From govisathish at gmail.com  Thu Sep 13 10:39:41 2007
From: govisathish at gmail.com (python_lover)
Date: Thu, 13 Sep 2007 07:39:41 -0700
Subject: Help to start python
In-Reply-To: <1189693433.545822.89580@o80g2000hse.googlegroups.com>
References: <1189693144.493878.130220@w3g2000hsg.googlegroups.com>
	<1189693433.545822.89580@o80g2000hse.googlegroups.com>
Message-ID: <1189694381.957459.232350@y42g2000hsy.googlegroups.com>

On Sep 13, 7:23 pm, kyoso... at gmail.com wrote:
> python_lover wrote:
> > Hi All,
>
> > I'm new  to python. I installed python 2.5  and IDLE 1.2.1 . I'm able
> > to run shell commands.
>
> > But I don't know how to execute a python program using this. When I'm
> > opeing a py program a seperate IDLE window opeing with program text.
> > But I don't know to to execute the prg.
>
> > Please help me on this .
>
> > thank you
>
> > regards
> > Sat
>
> When in IDLE, you can go to the Run menu and choose Run Module (or
> press F5) in the window that has the program code.
>
> Hope that helps!
>
> Mike- Hide quoted text -
>
> - Show quoted text -

Thankx mike.

It is working well.

Please guide me some good sites to start web based programing on
python.

thank you.

sat



From steve at holdenweb.com  Fri Sep 21 14:30:10 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 21 Sep 2007 14:30:10 -0400
Subject: TRying to import files from my folder not pythons lib folder
In-Reply-To: <1190396569.732154.234270@r29g2000hsg.googlegroups.com>
References: <1190395964.541835.114350@50g2000hsm.googlegroups.com>
	<1190396569.732154.234270@r29g2000hsg.googlegroups.com>
Message-ID: <fd12jj$jsm$1@sea.gmane.org>

kyosohma at gmail.com wrote:
> On Sep 21, 12:32 pm, "tedpot... at gmail.com" <tedpot... at gmail.com>
> wrote:
>> Hi,
>>
>> I'm trying to create my own lib of functions, but it seems like I can
>> only import them if they are in pythons lib folder.
>>
>> Example
>> I have a folder called
>> K:\mypython
>>
>> Now in the interactive python shell I type
>> Import k:\mypython\listall
>> And get a error on :
>>
>> If I store listall.py in pythons lib folder and type
>> Limport listall
>>
>> It works fins.
>>
>> Can I create my own library of functions and store them in a separate
>> dir????
>>
>> Also I try to creat a folder in pythomns lib folder and that did not
>> work
>>
>> Help
>> -Ted
> 
> One workaround is to do to this:
> 
> <code>
> 
> import sys
> sys.path.append(r'K:\mypython')
> import listall
> 
> </code>
> 
> You can also add your path to the .pth file, but I've never done that,
> so I can't tell you how.
> 
> Hope that helps!
> 
> Mike
> 
The easiest way, particularly for testing, is to set the PYTHONPATH 
variable. It should be a colon-separated list of directories on Unices, 
and a semi-colon separated list on Windows. Those directories will be 
added to sys.path.

See http://docs.python.org/tut/node8.html for yet more.

regards
  Steve

-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From rbonvall at gmail.com  Mon Sep  3 13:04:57 2007
From: rbonvall at gmail.com (Roberto Bonvallet)
Date: Mon, 03 Sep 2007 17:04:57 -0000
Subject: Problem with extremely small real number
In-Reply-To: <1188831370.133673.205230@r29g2000hsg.googlegroups.com>
References: <1188831370.133673.205230@r29g2000hsg.googlegroups.com>
Message-ID: <1188839097.832915.231490@w3g2000hsg.googlegroups.com>

On 3 sep, 10:56, Andrea <aciru... at gmail.com> wrote:

> def binomial(n, k):
>         assert n>0 and isinstance(n, (int, long)) and isinstance(k,
> (int,long))

Don't use assert to check whether the parameters have the right value.
assert should be used to claim that a certain condition always hold in
your program.
Prefer the following form, which will make debugging clearer:

    if n <= 0:
        raise ValueError("Wrong value of n")
    if not isinstance(n, (int, long)):
        raise TypeError("Wrong type of n")
    if not isinstance(k, (int, long)):
        raise TypeError("Wrong type of k")

Anyway, you shouldn't be checking the type of the parameters either.
It could be more useful if you cast to the desired type.  This way,
your function will handle gracefully the case when you accidentally
pass a string as a parameter:

    n = int(n)
    k = int(k)
    if n <= 0:
        raise ValueError("Wrong value of n: %d" % n)

Best regards,
--
Roberto Bonvallet



From steve at holdenweb.com  Mon Sep 24 23:04:03 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 24 Sep 2007 23:04:03 -0400
Subject: Regular Expressions: Can't quite figure this problem out
In-Reply-To: <496954360709241951h6901d60etf2c4b3b5ec759f2a@mail.gmail.com>
References: <496954360709241737o6e42e7efk29886b5631f6ca2e@mail.gmail.com>	
	<a49e45f50709241827i107d0acav28431853ef403702@mail.gmail.com>	
	<496954360709241853w6bb6e813ved0ec4fc80304d51@mail.gmail.com>	
	<op.ty6tjyfqx6zn5v@gabriel2.softlabbsas.com.ar>	
	<496954360709241917m3801e4aavee29cfef7deaf41b@mail.gmail.com>	
	<fd9rs6$8b2$1@sea.gmane.org>
	<496954360709241951h6901d60etf2c4b3b5ec759f2a@mail.gmail.com>
Message-ID: <46F87AA3.4040106@holdenweb.com>

Robert Dailey wrote:
> What I meant was that it's not an option because I'm trying to learn 
> regular expressions. RE is just as built in as anything else.
> 
> On 9/24/07, *Steve Holden * <steve at holdenweb.com 
> <mailto:steve at holdenweb.com>> wrote:
> 
>     Robert Dailey wrote:
>      >
>      >
>      > On 9/24/07, *Gabriel Genellina* <gagsl-py2 at yahoo.com.ar
>     <mailto:gagsl-py2 at yahoo.com.ar>
>      > <mailto:gagsl-py2 at yahoo.com.ar <mailto:gagsl-py2 at yahoo.com.ar>>>
>     wrote:
>      >
>      >     Yes: forget about regular expressions. ElementTree does that
>     for free:
>      >
>      >
>      > That's not an option.
>      >
>     Even though it's built into Python 2.5? That's a strange requirement.
> 
> 
Fair enough, but be aware that (as has already been pointed out) RE 
limitations will make it difficult to parse some XML. Still, trying to 
use them for that purpose is a good way of learning about them, I suppose.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline


From ldo at geek-central.gen.new_zealand  Fri Sep 21 05:20:39 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Fri, 21 Sep 2007 21:20:39 +1200
Subject: urllib2 POST problem
References: <1190231918.779534.22810@v29g2000prd.googlegroups.com>
Message-ID: <fd02d7$b2g$1@lust.ihug.co.nz>

In message <1190231918.779534.22810 at v29g2000prd.googlegroups.com>, darran
wrote:

> entry = "<request><notes>testing API</notes><hours>3.5</
> hours><project_id>65750</project_id><task_id>79702</
> task_id><spent_at>Thu, 13 Sep 2007</spent_at></request>"

...

> # this POST (same data as the above curl example) fails with an
> internal server error (500)
> req = urllib2.Request(url='http://subdomain.harvestapp.com/daily/add',
> data=entry)
> response = opener.open(req)
> print response.read()

Perhaps the value of "entry" needs to be URL-encoded?


From hyena at gmail.com  Sun Sep 30 09:38:04 2007
From: hyena at gmail.com (hyena)
Date: Sun, 30 Sep 2007 15:38:04 +0200
Subject: is it possible to use different font within one wxpython static
	text widget?
In-Reply-To: <1189613154.244069.15590@o80g2000hse.googlegroups.com>
References: <cbb24$46e8052d$839b8704$27403@news2.tudelft.nl>
	<1189613154.244069.15590@o80g2000hse.googlegroups.com>
Message-ID: <abd2d$46ffa6bd$4df9f6c6$19532@news1.tudelft.nl>

kyosohma at gmail.com ??:
> On Sep 12, 10:26 am, "hyena" <a... at hut.at> wrote:
>> problem is as title, bear me if this too silly or too naive.
>>
>> I use wx.statictext widget to show some information in GUI, there are some
>> numbers in the text to be emphasized in bigger other color. For example, in
>> sentence "the travel speed of this car is 40 km /hour", I would like "40" to
>> be bigger and in red color. I know I can use several statictext to get this
>> effect. But i am quite relucktant to do so since I am quite unfamiliar with
>> manageing the layout of widgets.
>>
>> Is there a convinient way to have this done? Thanks for any .input
> 
> 
> Without knowing what kind of interface you're making, I can only shoot
> in the dark. From your question, I would think that the FancyText
> widget would suffice. Other widgets that would be harder to use would
> be the StyledTextCtrl and the HtmlWindow (which I use for About
> dialogs).
> 
> Check out the wxPython Demo for sample code on each of these widgets
> and sizers. Also see the Wiki for tips and tricks on using Sizers.
> There's a new SizedControl that's supposed to simplify creating
> layouts, although I haven't used it. And there's also XRC too.
> 
> Mike
> 
Sorry did not check this group for a while. Thanks Mike for your input. 
I will go take a look at the fancytext widget.

Thanks again.



From stefan.behnel-n05pAM at web.de  Sat Sep 15 10:41:03 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Sat, 15 Sep 2007 16:41:03 +0200
Subject: python 2.5 cElementTree entity troubles
In-Reply-To: <5l22jsF5taqoU1@mid.uni-berlin.de>
References: <5l22jsF5taqoU1@mid.uni-berlin.de>
Message-ID: <46EBEEFF.80106@web.de>

Diez B. Roggisch wrote:
> Any suggestions on how to teach the built-in ET-parser entities?

As you already do it in your code.

http://effbot.org/elementtree/elementtree-xmlparser.htm#tag-ET.XMLParser.entity

But I guess your version of cET is just too old.

Stefan


From zzbbaadd at aol.com  Tue Sep  4 01:00:28 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Mon, 03 Sep 2007 22:00:28 -0700
Subject: parameter list notation
Message-ID: <1188882028.165803.316540@r34g2000hsd.googlegroups.com>

I am trying to use a database written in Python called buzhug.

In looking at some of the functions I see this prototype:

    def create(self,*fields,**kw):

I am not clear on what the * and the ** are for or what they
represent. Or, what are they referred to as so I can do a query for
information on them.

Thanks
TFD



From tim at tdw.net  Sat Sep 15 05:27:36 2007
From: tim at tdw.net (Tim Williams)
Date: Sat, 15 Sep 2007 10:27:36 +0100
Subject: trim start and trailing space chars from string
In-Reply-To: <46EBA4B1.1030302@yahoo.gr>
References: <46EBA4B1.1030302@yahoo.gr>
Message-ID: <9afea2ac0709150227j3ef7516cx401678b60bffa10c@mail.gmail.com>

On 15/09/2007, Konstantinos Pachopoulos <kostaspaxos at yahoo.gr> wrote:
> Hi,
> is there something corresponding to the java String.trim() method, ie
> trim start and trailing space/tab chars from string?
> say convert " asdf   "  to "asdf"?

>>> ' asdf '.strip()
'asdf'
>>> ' asdf '.rstrip()
' asdf'
>>> ' asdf '.lstrip()
'asdf '
>>>


From gagsl-py2 at yahoo.com.ar  Mon Sep 17 15:36:48 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 17 Sep 2007 16:36:48 -0300
Subject: UnicodeEncodeError in Windows
References: <1190025496.308969.51400@n39g2000hsh.googlegroups.com>
Message-ID: <op.tytcrmwbx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 17 Sep 2007 07:38:16 -0300, geoff_ness <geoffness8 at gmail.com>  
escribi?:

> def buildString(warrior):
>         """Build a string from a warrior's stats
>
>         Returns string for output to warStat."""
>         return "!tr!!td!!id!"+str(warrior.ID)+"!/id!!/td!"+\
>         "!td!"+str(warrior.damage)+"!/td!!td!"+str(warrior.kills)+\
>         "!/td!!td!"+str(warrior.survived)+"!/td!!/tr!"
>
> This code runs fine on my linux machine, but when I sent the code to a
> friend with python running on windows, he got the following error:
>
> Traceback (most recent call last):
>  File "C:\Documents and Settings\Administrator\Desktop
> \reparser_014(2)\iotp_alt2.py", line 169, in buildString
>    "!/td!!td!"+str(warrior.survived)+"!/td!!/tr!"
> UnicodeEncodeError: 'ascii' codec can't encode character u'\ufeff' in
> position 0: ordinal not in range(128)
>
> As I understand it the error is related to the ascii codec being
> unable to cope with the unicode string u'\ufeff'.
> The issue I have is that this error doesn't show up for me - ascii is
> the default encoding for me also. Any thoughts or assistance would be
> welcomed.

Some of those `warrior` attributes is an Unicode object that contains  
characters outside ASCII. str(x) tries to convert to string, using the  
default encoding, and fails. This happens on Windows and Linux too,  
depending on the data.
I've seen that you use codecs.open: you should write Unicode objects to  
the file, not strings, and that would be fine.
Look for some recent posts about this same problem.

-- 
Gabriel Genellina



From bbxx789_05ss at yahoo.com  Fri Sep  7 19:13:35 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Fri, 07 Sep 2007 16:13:35 -0700
Subject: why should I learn python
In-Reply-To: <xN4Ei.2189$3Y1.901@newssvr17.news.prodigy.net>
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
	<LC_Di.8274$924.7987@newssvr23.news.prodigy.net>
	<1189117798.506367.278560@y42g2000hsy.googlegroups.com>
	<1189118200.040934.151520@57g2000hsv.googlegroups.com>
	<1189133913.480902.289070@57g2000hsv.googlegroups.com>
	<xN4Ei.2189$3Y1.901@newssvr17.news.prodigy.net>
Message-ID: <1189206815.524056.153820@o80g2000hse.googlegroups.com>

On Sep 6, 10:51 pm, James Stroud <jstr... at mbi.ucla.edu> wrote:
> BartlebyScrivener wrote:
> > On Sep 6, 5:36 pm, Andr? <andre.robe... at gmail.com> wrote:
>
> >> Easy to read, easy to write, good libraries and, I have found, an
> >> extremely helpful community.
>
> >> Hobbyists (like me) can work on projects written in Python on and off
> >> (sometimes for weeks if not months without programming) and be able to
> >> resume the work very quickly (because it's so easy to read and
> >> understand the code).
>
> > I second these.  I am not a programmer. You can get busy with other
> > projects for weeks and come back to Python code and pick up where you
> > left off, because it uses WORDS.  Try remembering what (<>) or <*>
> > means after being away from Perl for a month.
>
> > rd
>
> Better is to try to remember the differences between and uses of:
>
>    $stupidPerl[4]
>    ${stupidPerl}[4]
>    $stupidPerl->[4]
>    ${stupidPerl}->[4]
>    $#stupidPerl[4]
>    $#{stupidPerl}[4]
>    $#{stupidPerl}->[4]
>    $#{$stupidPerl}->[4]->[4]
>
> And so on.
>
> Quiz: which are valid? (Careful now.)
>
> The friggin' language is useless (except for the fact that, like
> window$, a lot of people insist on using it over superior alternatives
> and so you find yourself confronting it from time to time). In fact, it
> was the need to use nested data structures that made me move to python
> when I realized all of the above would be a thing of the past (also made
> useless my perl "cheat sheet" that sits in my big-fat-useless-camel-book).
>
> $Perl->[Useless]
>
> --
> James Stroud
> UCLA-DOE Institute for Genomics and Proteomics
> Box 951570
> Los Angeles, CA 90095
>
> http://www.jamesstroud.com/

rofl.



From deets at nospam.web.de  Wed Sep 19 13:41:25 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 19 Sep 2007 19:41:25 +0200
Subject: compile for ARM
In-Reply-To: <mailman.774.1190221806.2658.python-list@python.org>
References: <mailman.774.1190221806.2658.python-list@python.org>
Message-ID: <5ld5avF7ne3mU1@mid.uni-berlin.de>

Rafael Marin Perez schrieb:
> Hello
> 
> I'm Rafael Marin, and work as reseacher in University of Murcia (Spain).
> 
> I want to install and compile modules of python2.4 in a ARMv5b
> architecture.
> 
> Any idea?

You might consider looking at the gumstix-project. They feature a 
linux-distro including python that is used by the gumstix running a 
XScale255-controller.  That machine is ARM-based- so you might get a 
clue on how to cross-compile for that architecture by looking at the 
gumstix-stuff.

Diez


From deets at nospam.web.de  Thu Sep 20 08:29:21 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 20 Sep 2007 14:29:21 +0200
Subject: I MEANT ONIX.... [it was Re: ONYX]
In-Reply-To: <1190283378.175422.73290@r29g2000hsg.googlegroups.com>
References: <1190211769.268351.79500@d55g2000hsg.googlegroups.com>
	<46f1726f$0$15276$426a74cc@news.free.fr>
	<1190282489.824709.29050@r29g2000hsg.googlegroups.com>
	<1190283378.175422.73290@r29g2000hsg.googlegroups.com>
Message-ID: <5lf7dsF7vn3qU1@mid.uni-berlin.de>

korovev76 at gmail.com schrieb:
> i'm such a lame... i meant onix... not onyx...
> http://xml.coverpages.org/onix.html
> 
> the questions remain the same ones...

lxml is a validating parser for python.

Diez


From dmitrey.kroshko at scipy.org  Wed Sep 19 07:39:44 2007
From: dmitrey.kroshko at scipy.org (dmitrey.kroshko at scipy.org)
Date: Wed, 19 Sep 2007 04:39:44 -0700
Subject: lambda-funcs problem
Message-ID: <1190201984.062329.182460@k79g2000hse.googlegroups.com>

hi all,
I need to create a Python list of lambda-funcs that are dependent on
the number of the ones, for example

F = []
for i in xrange(N):
    F.append(lambda x: x + i)

however, the example don't work - since i in end is N-1 it yields x+
(N-1) for any func.

So what's the best way to make it valid?
Evaluation speed is also very important to me.

Thank you in advance, D.



From larry.bates at websafe.com  Mon Sep 17 11:06:12 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Mon, 17 Sep 2007 10:06:12 -0500
Subject: Parsing problems: A journey from a text file to a directory tree
In-Reply-To: <1189958074.670245.17910@n39g2000hsh.googlegroups.com>
References: <1189958074.670245.17910@n39g2000hsh.googlegroups.com>
Message-ID: <1uSdnaBGwMtvCnPbnZ2dnUVZ_tjinZ2d@comcast.com>

Since you are going to need to do a dialog, I would use wxWindows tree
control.  It already knows how to do what you describe.  Then you can
just walk all the branches and create the folders.

-Larry

Martin M. wrote:
> Hi everybody,
> 
> Some of my colleagues want me to write a script for easy folder and
> subfolder creation on the Mac.
> 
> The script is supposed to scan a text file containing directory trees
> in the following format:
> 
> [New client]
> |-Invoices
> |-Offers
> |--Denied
> |--Accepted
> |-Delivery notes
> 
> As you can see, the folder hierarchy is expressed by the amounts of
> minuses, each section header framed by brackets (like in Windows
> config files).
> 
> After the scan process, the script is supposed to show a dialog, where
> the user can choose from the different sections (e.g. 'Alphabet',
> 'Months', 'New client' etc.). Then the script will create the
> corresponding folder hierarchy in the currently selected folder (done
> via AppleScript).
> 
> But currently I simply don't know how to parse these folder lists and
> how to save them in an array accordingly.
> 
> First I thought of an array like this:
> 
> dirtreedb = {'New client': {'Invoices': {}, 'Offers': {'Denied': {},
> 'Accpeted': {}}, 'Delivery notes': {}}}
> 
> But this doesn't do the trick, as I also have to save the hierarchy
> level of the current folder as well...
> 
> Argh, I really don't get my head around this problem and I need your
> help. I have the feeling, that the answer is not that complicated, but
> I just don't get it right now...
> 
> Your desperate,
> 
> Martin
> 


From tigerb at yahoo.com  Wed Sep 12 19:36:18 2007
From: tigerb at yahoo.com (TonyB)
Date: Wed, 12 Sep 2007 23:36:18 -0000
Subject: struct is saving 4 bytes instead of 2
In-Reply-To: <5kr8fkF53m8gU1@mid.individual.net>
References: <1189632217.661924.25520@r34g2000hsd.googlegroups.com>
	<5kr8fkF53m8gU1@mid.individual.net>
Message-ID: <1189640178.267346.321040@r34g2000hsd.googlegroups.com>

On Sep 12, 6:45 pm, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:
> TonyB wrote:
> > When I inspect the file with a hex editor it show that the
> > variable is being saved as 4 bytes.  How can I make it save the
> > value as 2 bytes?
>
> Use an aligment specifier in the format string (you want "standard"
> alignment). See:
>
> http://docs.python.org/lib/module-struct.html
>
> Regards,
>
> Bj?rn
>
> --
> BOFH excuse #428:
>
> Firmware update in the coffee machine

Bj?rn,

I tried

f.write(struct.pack('=h',thevariable))

and it works.  Many thanks,
Tony





From kyosohma at gmail.com  Thu Sep 27 10:26:24 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 27 Sep 2007 14:26:24 -0000
Subject: setuptools without unexpected downloads
In-Reply-To: <mailman.1140.1190847171.2658.python-list@python.org>
References: <87ejgmklep.fsf@benfinney.id.au>
	<1190802526.695391.326220@n39g2000hsh.googlegroups.com>
	<5lurorFa92euU1@mid.uni-berlin.de>
	<1190805012.275901.227570@57g2000hsv.googlegroups.com>
	<5luv0iFaai82U1@mid.uni-berlin.de>
	<1190808836.056298.232640@57g2000hsv.googlegroups.com>
	<fddivk$f90$1@sea.gmane.org>
	<mailman.1111.1190813942.2658.python-list@python.org>
	<1190840682.716950.131830@r29g2000hsg.googlegroups.com>
	<mailman.1140.1190847171.2658.python-list@python.org>
Message-ID: <1190903184.578243.192110@n39g2000hsh.googlegroups.com>

On Sep 26, 5:52 pm, Steve Holden <st... at holdenweb.com> wrote:
> kyoso... at gmail.com wrote:
> > On Sep 26, 8:30 am, Steve Holden <st... at holdenweb.com> wrote:
> >> Fredrik Lundh wrote:
> >>> Paul Boddie wrote:
> >>>> P.S. Of course, the package maintainer problem manifests itself most
> >>>> prominently on Windows where you often see people asking for pre-built
> >>>> packages or installers.
> >>> for the record, I'd love to see a group of volunteers doing stuff like
> >>> this for Windows.  there are plenty of volunteers that cover all major
> >>> Linux/*BSD distributions (tons of thanks to everyone involved in this!),
> >>> but as far as I can remember, nobody has ever volunteered to do the same
> >>> for Windows.
> >> I'd like to see something like this happen, too, and if a group of
> >> volunteers emerges I'll do what I can through the PSF to provide
> >> resources. Activities that benefit the whole community (or a large part
> >> of it) are, IMHO, well worth supporting.
>
> > What would it entail to do this? Using py2exe + some installer (like
> > Inno Setup) to create an installer that basically copies/installs the
> > files into the site-packages folder or wherever the user chooses? If
> > that's all it is, I would think it would be fairly easy to create
> > these. Maybe I'm over-simplifying it though.
>
> > What are a some examples of packages that need this?
>
> MySQLdb and psycopg are two obvious examples I have had to grub around
> or produce my own installers for. There's generally some configuration
> work to do for packages that have been produced without considering
> Windows requirements, and ideally this will be fed back to the developers.
>
> I think you may be oversimplifying a little. Pure Python packages aren't
> too problematic, it's mostly the extension modules. Unless a copy of
> Visual Studio is available (and we *might* get some cooperation from
> Microsoft there) that means resorting to MingW, which isn't an easy
> environment to play with (in my occasional experience, anyway).
>
> There's going to be increasing demand for 64-bit implementations too.
>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
>
> Sorry, the dog ate my .sigline

Steve,

We have Visual Studio 2005 at work and my boss is a Python nut, so I
could probably use it. I also have academic versions of VS 6 and 2003
(maybe 2005 too...I forget, it might be 2004) at home as well...I
think I can use those for open source development, although knowing
Microsoft, there's probably something draconian hiding in the EULA
somewhere.

If someone is willing to give me some guidance, I'll give it a try.

Mike



From zowtar at gmail.com  Wed Sep  5 13:54:12 2007
From: zowtar at gmail.com (zowtar)
Date: Wed, 05 Sep 2007 10:54:12 -0700
Subject: python-spidermonkey
In-Reply-To: <5k87f6F2icddU1@mid.uni-berlin.de>
References: <1189012861.893842.87710@k79g2000hse.googlegroups.com>
	<5k87f6F2icddU1@mid.uni-berlin.de>
Message-ID: <1189014852.804852.254390@k79g2000hse.googlegroups.com>


Diez B. Roggisch escreveu:

> zowtar schrieb:
> > Guys, I am using slackware... js-spidermonkey 1.5 compiled - OK, Pyrex
> > installed, but python-spidermonkey don't build...
> >
> > Screenshot: http://img406.imageshack.us/img406/562/testebp5.png
> >
> > what is the problem?
>
> google dead today?
>
> http://article.gmane.org/gmane.comp.python.wwwsearch.general/1085
>
> Might help.
>
> Diez

I need make tests... but I think is working now... thanks a lot!



From grue at mail.ru  Sun Sep 30 12:09:22 2007
From: grue at mail.ru (Timofei Shatrov)
Date: Sun, 30 Sep 2007 16:09:22 GMT
Subject: The Modernization of Emacs: terminology buffer and keybinding
References: <1182093200.598418.218620@e9g2000prf.googlegroups.com>
	<1182272495.990807.99110@a26g2000pre.googlegroups.com>
	<87tzt3ihev.fsf@kobe.laptop> <m31wg6lre9.fsf@borud.not>
	<1182370216.961241.6960@n60g2000hse.googlegroups.com>
	<85zm2ufjpb.fsf@lola.goethe.zz>
	<1182372592.803332.288260@u2g2000hsc.googlegroups.com>
	<m3myyt47nq.fsf@latakia.dyndns.org>
	<1182549094.366282.286740@m37g2000prh.googlegroups.com>
	<87bqf7fwmg.fsf@telesippa.clsnet.nl>
	<1182553682.197778.138500@g37g2000prf.googlegroups.com>
	<873b0fhokz.fsf@kobe.laptop> <13frd6vtarbee75@corp.supernews.com>
	<pmnLi.1684$hP.1048@newsfe12.lga> <87lkao8xgk.fsf@web.de>
Message-ID: <46ffc8cb.34689260@news.readfreenews.net>

On Sun, 30 Sep 2007 08:43:39 +0200, Klaus Schilling <schilling.klaus at web.de>
tried to confuse everyone with this message:

>
>that's because it's immoral not to give it all
>
>which is necessary in a moral culture.
>Only an immoral culture may accept non-disclosure
>
>private property is unethical
>

I see the light! You really won me over with your preaching.

-- 
|Don't believe this - you're not worthless              ,gr---------.ru
|It's us against millions and we can't take them all... |  ue     il   |
|But we can take them on!                               |     @ma      |
|                       (A Wilhelm Scream - The Rip)    |______________|


From fakeaddress at nowhere.org  Mon Sep 24 03:28:09 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Mon, 24 Sep 2007 00:28:09 -0700
Subject: Google and Python
In-Reply-To: <1i4rfyx.8vuc2j14j596uN%aleax@mac.com>
References: <1190228512.627109.308910@n39g2000hsh.googlegroups.com>
	<ufadnRC5BPZm6GzbnZ2dnUVZ_jOdnZ2d@comcast.com>
	<1190231094.276099.136250@22g2000hsm.googlegroups.com>
	<mailman.781.1190232163.2658.python-list@python.org>
	<1190235678.019823.315850@o80g2000hse.googlegroups.com>
	<SYpIi.5291$7P7.2845@newssvr19.news.prodigy.net>
	<1i4rfyx.8vuc2j14j596uN%aleax@mac.com>
Message-ID: <SFJJi.316$ua4.285@newssvr22.news.prodigy.net>

Alex Martelli wrote:
> Bryan Olson wrote:
[...]
>> How does Google use Python? As their scripting-language
>> of choice. A fine choice, but just a tiny little piece.
>>
>> Maybe Alex will disagree with me. In my short time at
>> Google, I was uber-nobody.
> 
> YouTube (one of Google's most valuable properties) is essentially
> all-Python (except for open-source infrastructure components such as
> lighttpd).  Also, at Google I'm specifically "Uber Tech Lead, Production
> Systems": while I can't discuss details, my main responsibilities relate
> to various software projects that are part of our "deep infrastructure",
> and our general philosophy there is "Python where we can, C++ where we
> must". 

Good motto. So is most of Google's code base now in
Python? About what is the ratio of Python code to C++
code? Of course lines of code is kine of a bogus measure.
Of all those cycles Google executes, about what portion
are executed by a Python interpreter?

> Python is definitely not "just a tiny little piece" nor (by a
> long shot) used only for "scripting" tasks; 

Ah, sorry. I meant the choice of scripting language was
a tiny little piece of Google's method of operation.
"Scripting language" means languages such as Python,
Perl, and Ruby.


> if the mutant space-eating
> nanovirus should instantly stop the execution of all Python code, the
> powerful infrastructure that has been often described as "Google's
> secret weapon" would seize up.

And the essence of the Google way is to employ a lot of
smart programmers to build their own software to run on
Google's infrastructure. Choice of language is triva.

I think both Python Google are great. What I find
ludicrous is the idea that the bits one hears about how
Google builds its software make a case for how others
should build theirs. Google is kind of secretive, and
their ways are very much their own. Google's software
is much more Googley than Pythonic.


-- 
--Bryan


From steve at REMOVE-THIS-cybersource.com.au  Sun Sep 16 08:51:00 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sun, 16 Sep 2007 12:51:00 -0000
Subject: generate list of partially accumulated values
References: <1189936564.932553.148800@50g2000hsm.googlegroups.com>
Message-ID: <13eq9lkpnlknl2b@corp.supernews.com>

On Sun, 16 Sep 2007 09:56:04 +0000, cesco wrote:

> Hi,
> 
> I have the following list:
> l = [1, 2, 3, 4]
> and I'd like to obtain a list like the following: 
> l_partial_sum = [1, 3, 6, 10] 
> (that is [1, 1+2, 1+2+3, 1+2+3+4])
> 
> Is there a simple way to accomplish this?

Yes, use a loop. Put it into a function:

def partial_sums(L):
    if not L:
        return []
    ps = [None]*len(L)
    ps[0] = L[0]
    for i in xrange(1, len(L)):
        ps[i] = ps[i-1] + L[i]
    return ps

>>> l = [1, 2, 3, 4]
>>> partial_sums(l)
[1, 3, 6, 10]


Here's a one-liner that give the same result:

[sum(l[0:i]) for i in xrange(len(l)+1)][1:]


Which is better, the one-liner using a super-fast built-in function 
written in C, or the multi-line function using just slow Python code?

(Hint: I wouldn't be asking the question if the "obvious" answer was 
right.)

Measure, don't guess!

>>> import timeit
>>> 
>>> timeit.Timer("partial_sums(l)", 
... "from __main__ import partial_sums; l = range(1000)").timeit(1000)
1.3528358936309814
>>> timeit.Timer("[sum(l[0:i]) for i in xrange(len(l)+1)][1:]", 
... "l = range(1000)").timeit(1000)
41.276183843612671

The one-liner is thirty times slower than the function. Can you explain 
why?

(Hint: how many times does it add numbers? How many times does it copy 
parts of the list?)



-- 
Steven.


From theller at ctypes.org  Thu Sep 13 05:19:11 2007
From: theller at ctypes.org (Thomas Heller)
Date: Thu, 13 Sep 2007 11:19:11 +0200
Subject: Get the complete command line as-is
In-Reply-To: <1189647903.978946.38350@r29g2000hsg.googlegroups.com>
References: <1189566000.793354.308420@19g2000hsx.googlegroups.com>	<fc83v4$cb3$1@news2.u-psud.fr>
	<1189647903.978946.38350@r29g2000hsg.googlegroups.com>
Message-ID: <fcavaf$rh9$1@sea.gmane.org>

wangzq schrieb:
> On Sep 12, 3:20 pm, Laurent Pointal <laurent.poin... at limsi.fr> wrote:
>> wangzq a ?crit :
>>
>> > Hello,
>>
>> > I'm passing command line parameters to my browser, I need to pass the
>> > complete command line as-is, for example:
>>
>> > test.py "abc def" xyz
>>
>> > If I use ' '.join(sys.argv[1:]), then the double quotes around "abc
>> > def" is gone, but I need to pass the complete command line ("abc def"
>> > xyz) to the browser, how can I do this?
>>
>> > I'm on Windows.
>>
>> As Windows command-line parsing seem to remove some chars, maybe you can
>> try to use the GetCommandLine() function from Win32 API (I dont know if
>> it is available in pywin32 package - you may need to write a wrapper
>> with ctypes).
>>
>> Seehttp://msdn2.microsoft.com/en-us/library/ms683156.aspx
>>
>> A+
>>
>> Laurent.
> 
> Thank you for the tip. It works:
> 
> import ctypes
> 
> p = ctypes.windll.kernel32.GetCommandLineA()
> print ctypes.c_char_p(p).value
> 

Better would be this code:

import ctypes
ctypes.windll.kernel32.GetCommandLineA.restype = ctypes.c_char_p
print ctypes.windll.kernel32.GetCommandLineA()

Thomas



From arne at vajhoej.dk  Fri Sep 14 19:51:14 2007
From: arne at vajhoej.dk (=?ISO-8859-1?Q?Arne_Vajh=F8j?=)
Date: Fri, 14 Sep 2007 19:51:14 -0400
Subject: Car-ac-systems
In-Reply-To: <Za6dnU1QmqNRGXTbnZ2dnUVZ8vudnZ2d@eclipse.net.uk>
References: <1189511932.371621.112970@o80g2000hse.googlegroups.com>
	<BeqdnaFrktIgBHvbnZ2dnUVZ8v-dnZ2d@eclipse.net.uk>
	<1189661753.315182.53630@22g2000hsm.googlegroups.com>
	<Za6dnU1QmqNRGXTbnZ2dnUVZ8vudnZ2d@eclipse.net.uk>
Message-ID: <46eb1e4e$0$90264$14726298@news.sunsite.dk>

[text reordered from top post to standard newsgroup style]

John Timney (MVP) wrote:
> <nebulous99 at gmail.com> wrote in message 
> news:1189661753.315182.53630 at 22g2000hsm.googlegroups.com...
>> On Sep 11, 9:35 am, "John Timney \(MVP\)"
>> <x_j... at timney.eclipse.co.uk> wrote:
>>> How do I control one with C# then!  Thats not on your site, clearly not
>>> everything I need to know then.  Waste of a site!
>> C# is just as off topic in comp.lang.java.programmer as car air-
>> conditioning systems. The latter, however, have the redeeming
>> characteristic that they are not the demonic spawn of evil Microsoft.
 > ho ho......now thats quite funny!

Before you start wondering too much try and make a search in
comp.lang.java.programmer for posts by nebulous99 ...

Arne


From seancron at gmail.com  Sat Sep  1 12:05:44 2007
From: seancron at gmail.com (seancron)
Date: Sat, 01 Sep 2007 16:05:44 -0000
Subject: nameerror upon calling function
Message-ID: <1188662744.345071.123610@57g2000hsv.googlegroups.com>

Hi,

I have a program that makes a call to a function in a different python
script that I wrote.  But, when I call the function I get the
following error:

NameError: global name 'WSDL' is not defined

I can't figure out why I'm getting this error since WSDL should be
defined. Here are the two scripts:

weatherpy.py
from xml.dom import minidom
from SOAPpy import WSDL
from libndfdsoap import ByDaySOAPRequest

wsdlfile = 'http://www.weather.gov/forecasts/xml/DWMLgen/wsdl/
ndfdXML.wsdl'

if __name__ == '__main__':
    ByDaySOAPRequest(39.0000, -77.0000, 2004-04-27, 7, '12 hourly')

libndfdsoap.py
def ByDaySOAPRequest(latitude, longitude, startDate, numDays,
hrFormat):
    """Sends a SOAP request using the NDFDgenByDay method and stores
the
    response in a file called weather.xml"""

    wsdlfile = 'http://www.weather.gov/forecasts/xml/DWMLgen/wsdl/
ndfdXML.wsdl'
    server = WSDL.Proxy(wsdlfile)
    response = server.NDFDgenByDay(latitude, longitude, startDate,
numDays,
                                   hrFormat)
    xml = open('/weather.xml', 'w')
    xml.write(response)
    xml.close()
    return

Can somebody please show me how to fix this error?

Thanks,

-Sean



From khemkaamit at gmail.com  Tue Sep 25 01:31:14 2007
From: khemkaamit at gmail.com (Amit Khemka)
Date: Tue, 25 Sep 2007 11:01:14 +0530
Subject: sorting a list numbers stored as strings
In-Reply-To: <1190633951.3385.23.camel@dot.uniqsys.com>
References: <1190632366.863711.100680@y42g2000hsy.googlegroups.com>
	<1360b7230709240423k47485263pedc6562000ba1597@mail.gmail.com>
	<1190633951.3385.23.camel@dot.uniqsys.com>
Message-ID: <1360b7230709242231m130bc8a0tecda74f66fd20a87@mail.gmail.com>

On 9/24/07, Carsten Haese <carsten at uniqsys.com> wrote:
> On Mon, 2007-09-24 at 16:53 +0530, Amit Khemka wrote:
> > On 9/24/07, aine_canby at yahoo.com <aine_canby at yahoo.com> wrote:
<snip>
> >
> > >>> l = ["1", "11", "2", "22"]
> > >>> sorted(l, cmp = lambda x, y: cmp(int(x), int(y)))  # provide your
> > own compare function !
> > >>> l
> > ['1', '2', '11', '22']
>
> That interpreter session is a work of fiction, since sorted returns the
> sorted list instead of sorting the list in place.

I am sorry, thanks for pointing out !
What I intended to write was:

>>> l = sorted(l, cmp = lambda x, y: cmp(int(x), int(y)))

Btw, It was more of a goofed up Reality show !

cheers,
-- 
----
Amit Khemka
website: www.onyomo.com
wap-site: www.owap.in


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Sep 27 03:30:34 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 27 Sep 2007 09:30:34 +0200
Subject: Using closures and partial functions to eliminate redundant code
In-Reply-To: <N9EKi.37131$RX.19410@newssvr11.news.prodigy.net>
References: <N9EKi.37131$RX.19410@newssvr11.news.prodigy.net>
Message-ID: <46fb5bf6$0$4748$426a34cc@news.free.fr>

Matthew Wilson a ?crit :
> I wrote some code to create a user and update a user on a remote box by
> sending emails to that remote box.  When I was done, I realized that my
> create_user function and my update_user function were effectively
> identical except for different docstrings and a single different value
> inside:
> 
>     ### VERSION ONE
> 
>     def create_user(username, userpassword, useremail):
>         "Send an email that will create a user in the remote system."
> 
>         # Build email
>         email_body = """
>     USERNAME = %s
>     USERPASSWORD = %s
>     USEREMAIL = %s
>     """ % (username, userpassword, useremail)
> 
>         # send it.
>         send_email(subject="CREATE", body=email_body)
> 
> 
>     def update_user(username, userpassword, useremail):
>         "Send an email that will update a user's password in the remote system."
> 
>         # Build email
>         email_body = """
>     USERNAME = %s
>     USERPASSWORD = %s
>     USEREMAIL = %s
>     """ % (username, userpassword, useremail)
> 
>         # send it.
>         send_email(subject="UPDATE", body=email_body)
> 
>     ### END

(snip)
> 
> Finally, I came up with this approach:
> 
>     ### VERSION THREE
> 
>     from functools import partial
> 
>     def _h(mode, username, userpassword, useremail):
> 
>         if mode not in ("create", "update"): 
>             raise ValueError("mode must be create or update!")
> 
>         # Build email
>         email_body = """
>     USERNAME = %s
>     USERPASSWORD = %s
>     USEREMAIL = %s
>     """ % (username, userpassword, useremail)
> 
>         # send it.  
>         send_email(subject=mode.upper(), body=email_body)
>             
>     # I can't figure out how to set up the docstring on these.
> 
>     v3_create_user = partial(_h, mode="create")
>     v3_update_user = partial(_h, mode="update")
> 
>     ### END
> 
> I'm interested to hear how other people deal with really similar code.

Depends.

> The similarity just bugs me.  However, I wonder if using stuff like
> closures or partial function application is needlessly showy.

Not necessarily, but in this case, it's just overkill IMHO - I'd just 
have factored out the common code:

    def _build_email(username, userpassword, useremail):
         """ builds the email body used by create_uer and update_user """
         return """
     USERNAME = %s
     USERPASSWORD = %s
     USEREMAIL = %s
     """ % (username, userpassword, useremail)


     def create_user(username, userpassword, useremail):
         "Send an email that will create a user in the remote system."
         send_email(subject="CREATE",
                    body=_build_email(username, userpassword, useremail)
                    )


     def update_user(username, userpassword, useremail):
         "Send an email that will update a user's password in the remote 
system."
         send_email(subject="UPDATE",
                    body=_build_email(username, userpassword, useremail)
                    )



Now there are of course cases where either closures and/or partials are 
the right thing to do.

> Also, I hope anyone here can help me figure out how to attach a
> meaningful docstring for my version three code.

Didn't try, but what about:
p = partial(func, arg)
p.__doc__ = "yadda yadda"



From puredata at 11h11.com  Tue Sep 25 23:08:15 2007
From: puredata at 11h11.com (patrick)
Date: Tue, 25 Sep 2007 23:08:15 -0400
Subject: jack audio connection kit
In-Reply-To: <1190774030.603655.85010@d55g2000hsg.googlegroups.com>
References: <mailman.1062.1190752347.2658.python-list@python.org>
	<1190774030.603655.85010@d55g2000hsg.googlegroups.com>
Message-ID: <46F9CD1F.50407@11h11.com>

found the perfect solution (for linux at least) : gstreamer!
http://pygstdocs.berlios.de/

pat


From veronika.lindstrand.kant at glocalnet.net  Thu Sep  6 16:06:24 2007
From: veronika.lindstrand.kant at glocalnet.net (Veronika Lindstrand Kant)
Date: Thu, 06 Sep 2007 22:06:24 +0200
Subject: Python and CUDO
Message-ID: <46E05DC0.7090102@glocalnet.net>

Hi!
I just wonder if there are any plans for building any support using 
NIVIDAS CUDO plattform into python?
For example when implementing Monte Carlo simulation performance always 
is an issue so extended numpy/numeric or a math library using the CUSO 
plattform could be a "cheap" grid approach.

I myself implemented a simple "batch grid" for distribute calculations 
to be executed in parallell supporting a typical pattern as:
for x in collect_data():
   post(calc(x))
syncronize()
generate_report(get_calculations())

So one idea supporting this pattern would be to define some kind of new 
form of generators which allows independ calculations be executed in 
parallell and depending on form returns the calculation either in 
synchronized way (i.e. returned in sequence order) or in a asyncronized 
order.

One other thing: for a long time I worked with a financial system, 
SunGard FRONT ARENA, which has integrated python into the system in a 
clever way according to Fredrik Lundh. I suggest that you extend the 
application list with this system.

/Fredrik Kant
www.kantconsulting.se



From dlwester at comcast.net  Mon Sep 24 15:59:52 2007
From: dlwester at comcast.net (Dave Westerman)
Date: Mon, 24 Sep 2007 15:59:52 -0400
Subject: execfile and function call
Message-ID: <nPOdnfr6xu2vimXbnZ2dnUVZ_tCrnZ2d@comcast.com>

I've got a Jython script where I'm doing an execfile() to pull in a 
small script that contains a function, which I then call.

execfile(app_applscript)
optionList = createOptionList(applOptions)

When I do this at the global level in my main script, it works just 
fine. However, when I move this code into a function in my main script, 
then it fails, telling me it can't find the function createOptionList().

Traceback (innermost last):
File "<string>", line 459, in ?
File "<string>", line 429, in processApplication
NameError: createOptionList

Does anyone have any idea what I'm doing wrong? I noticed that 
createOptionList no longer shows up when I do a dir(). Do I somehow have 
to get that to be a global? How do I do that?


From andres.j.new at gmail.com  Sun Sep 30 23:10:05 2007
From: andres.j.new at gmail.com (Andres Riofrio)
Date: Sun, 30 Sep 2007 20:10:05 -0700
Subject: Fwd: Using fractions instead of floats
In-Reply-To: <52c50880709302007g4103c6c6h9b09ee376fa77998@mail.gmail.com>
References: <1191202509.853059.222530@k79g2000hse.googlegroups.com>
	<1191206183.441075.167450@57g2000hsv.googlegroups.com>
	<52c50880709302007g4103c6c6h9b09ee376fa77998@mail.gmail.com>
Message-ID: <52c50880709302010n7cbc070fn6223bd94a67542dd@mail.gmail.com>

PS: Sorry, George Sakkis, for the double emailing... I forgot to add
python-list in the To: field the first time. :)

Haha. Ok. Thank you for pointing me to those links :). I hadn't
thought of searching for the word 'rational' instead of 'decimal'...

>From what I've read, seems that the principal reason for rejecting the
PEP is that there was not much need (enthusiasm)... Well, then I have
a question: Is there a way to make 5/2 return something other than an
integer? I can do:
class int(int):
  def __add__(self, other):
    pass
but that will only work if I do int(5)/int(2)...

(setting __builtin__.int=int doesn't work, either)

What I'd like is to be able to implement what I put in the proposal,
as I don't think it's a really big language change...

On 9/30/07, George Sakkis <george.sakkis at gmail.com> wrote:
> On Sep 30, 9:35 pm, andresj <andres.j.... at gmail.com> wrote:
> > I was doing some programming in Python, and the idea came to my mind: using fractions instead of floats when doing 2/5.
> > (...)
> > I would like to get some feedback on this idea. Has this been posted
> > before? If so, was it rejected? and for what?
>
> Is internet down today ?
>
> http://pypi.python.org/pypi/clnum/1.2
> http://www.python.org/dev/peps/pep-0239/


From stefan.behnel-n05pAM at web.de  Thu Sep 13 11:36:51 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Thu, 13 Sep 2007 17:36:51 +0200
Subject: lxml + mod_python: cannot unmarshal code objects in restricted
	execution mode
In-Reply-To: <1189688758.587404.139360@r29g2000hsg.googlegroups.com>
References: <1189688758.587404.139360@r29g2000hsg.googlegroups.com>
Message-ID: <46E95913.9030507@web.de>

Dmitri Fedoruk wrote:
> def extApplyXslt(xslt, data, logger ):
>     try:
>         strXslt = urllib2.urlopen(xslt).read()
>         # i have to read the xslt url to the python string
>     except urllib2.HTTPError, e:
>        .......
>     except urllib2.URLError, e:
>        .............
>     try:
>         xslt_parser = etree.XMLParser()
>         xslt_parser.resolvers.add( PrefixResolver("XSLT") )
> 
>         # and now I have to use the string; a more elegant solution,
> anyone?

Sure, lxml.etree can parse from file-like objects. Just hand in the result of
urlopen().

Apart from that, I saw that you found your way to the lxml mailing list, I'll
respond over there.

Stefan


From steven.bethard at gmail.com  Tue Sep 25 12:47:48 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 25 Sep 2007 10:47:48 -0600
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
Message-ID: <i-6dneF0MqovpmTbnZ2dnUVZ_iydnZ2d@comcast.com>

Mark Summerfield wrote:
> PEP: XXX
> Title: Sorted Dictionary
[snip]
>     In addition, the keys() method has two optional arguments:
> 
>     keys(firstindex : int = None, secondindex : int = None) -> list of keys
> 
>     The parameter names aren't nice, but using say "start" and "end" would
>     be misleading since the intention is for the parameters to work like
>     they do in range(), e.g.
> 
>         sd.keys()       # returns a list of all the sorteddict's keys
>         sd.keys(10)     # returns a list of the first 10 keys
>         sd.keys(19, 35) # returns a list of the 19th-34th keys inclusive

You should use the range() names, "start" and "stop":

     >>> help(range)
     Help on built-in function range in module __builtin__:

     range(...)
         range([start,] stop[, step]) -> list of integers

But I also agree that this is probably not necessary given the existence 
of slicing and itertools.islice().

>     Since the sorteddict's data is always kept in key order, indexes
>     (integer offsets) into the sorteddict make sense.  Five additional
>     methods are proposed to take advantage of this:
> 
>     key(index : int) -> value
> 
>     item(index : int) -> (key, value)
> 
>     value(index : int) -> key
> 
>     set_value(index : int, value)
> 
>     delete(index : int)
> 
>     Items and values can still be accessed using the key, e.g., sd[key],
>     since all the dict's methods are available.

I agree with others that these APIs are really not necessary. Simply 
call keys(), values() or items() and then use that list if you really 
want indexing. If you're dealing with a lot of these kind of indexing 
behaviors, working with the plain list object will be faster anyway.

> Examples
> 
>     To keep a collection of filenames on a case-insensitive file system in
>     sorted order, we could use code like this:
> 
>         files = collections.sorteddict.sorteddict()

The type should probably just be in collections directly. No need for a 
sub-package. So that would look like::

     files = collections.sorteddict()

I also strongly support Paul Hankin's proposal for the constructor API::

     sorteddict((mapping|sequence|..), cmp=None, key=None, reverse=False)

Being able to sort by a key= function would make sorteddict() 
dramatically more useful. I almost never use the builtin heap() because 
it doesn't support a key= function and I always need one. I suspect use 
cases for sorteddict() will be similar. For example::

     files = collections.sorteddict(key=lambda s: s.lower())
     for name in os.listdir("."):
         files[name] = ... some calculated value ...

Now the file names are in lower-case sorted order, but if you actually 
retrieve the keys, e.g. through .items(), you'll see the real filename, 
not the lower-cased ones.

STeVe


From dstromberglists at gmail.com  Tue Sep 25 20:58:56 2007
From: dstromberglists at gmail.com (Dan Stromberg)
Date: Tue, 25 Sep 2007 17:58:56 -0700
Subject: Python XML API's that preserve XML comments?
Message-ID: <pan.2007.09.26.00.58.55.406301@gmail.com>


Are there any python XML parsing API's that preserve comments -
preferrably that come with python 2.5.1?



From zzbbaadd at aol.com  Mon Sep 10 07:35:37 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Mon, 10 Sep 2007 04:35:37 -0700
Subject: Enum class with ToString functionality
In-Reply-To: <1189416537.050002.61120@r34g2000hsd.googlegroups.com>
References: <1189416537.050002.61120@r34g2000hsd.googlegroups.com>
Message-ID: <1189424137.007519.272320@y42g2000hsy.googlegroups.com>

On Sep 10, 2:28 am, bg... at yahoo.com wrote:
> Hi,
>
> I have the following class -
>
> class TestOutcomes:
>     PASSED = 0
>     FAILED = 1
>     ABORTED = 2
>
> plus the following code -
>
> testResult = TestOutcomes.PASSED
>
> testResultAsString
> if  testResult == TestOutcomes.PASSED:
>     testResultAsString = "Passed"
> elif testResult == TestOutcomes.FAILED :
>     testResultAsString = "Failed"
> else:
>     testResultAsString = "Aborted"
>
> But it would be much nicer if I had a function to covert to string as
> part of the TestOutcomes class. How would I implement this?
>
> Thanks,
>
> Barry

The equivalent to Java's toString() is __str__() in Python:

class TestOutcomes:
    PASSED = 0
    FAILED = 1
    ABORTED = 2

    def __init__(self,outcome):
        self.outcome = outcome

    def __str__(self):
        if  self.outcome == TestOutcomes.PASSED:
           return "Passed"
        elif self.outcome == TestOutcomes.FAILED :
           return "Failed"
        else:
           return "Aborted"

if __name__ == "__main__":
    testResult = TestOutcomes(TestOutcomes.ABORTED)
    print testResult
    testResult = TestOutcomes(TestOutcomes.FAILED)
    a = testResult.__str__()
    print a

Aborted
Failed




From bdesth.quelquechose at free.quelquepart.fr  Thu Sep 20 05:43:02 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 20 Sep 2007 11:43:02 +0200
Subject: Lookup values from one table to another based on a value
In-Reply-To: <1190315957.295875.34220@n39g2000hsh.googlegroups.com>
References: <1190298876.689060.44540@d55g2000hsg.googlegroups.com>
	<46f2930a$0$9505$426a74cc@news.free.fr>
	<1190305331.584560.218880@g4g2000hsf.googlegroups.com>
	<46f2a4e6$0$15456$426a74cc@news.free.fr>
	<1190315957.295875.34220@n39g2000hsh.googlegroups.com>
Message-ID: <46f2d599$0$8933$426a74cc@news.free.fr>

koutoo at hotmail.com a ?crit :
(snip)
> 
> If I flipped the Table being looked up not to repeat, would that make
> things easier to look up a value in?

Don't repeat informations.


From rrr at ronadam.com  Sun Sep 23 19:34:20 2007
From: rrr at ronadam.com (Ron Adam)
Date: Sun, 23 Sep 2007 18:34:20 -0500
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <13fdmdmsaasak91@corp.supernews.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>	<mailman.900.1190414696.2658.python-list@python.org>	<1190415741.380795.259050@y42g2000hsy.googlegroups.com>	<13f8unjjeqs5p97@corp.supernews.com>	<mailman.916.1190444594.2658.python-list@python.org>	<13faa66cb1phre1@corp.supernews.com>	<mailman.936.1190535220.2658.python-list@python.org>
	<13fdmdmsaasak91@corp.supernews.com>
Message-ID: <46F6F7FC.1050208@ronadam.com>



Scott David Daniels wrote:
> Ron Adam wrote:
>> Scott David Daniels wrote:
>>> Ron Adam wrote:
>>>> .... How about this?
>>>> def integrate(fn, x1, x2, n=100):...
>>> The point was a pedagogic suggestion, ... 
>> I understood your point.  I just found it interesting since I've been 
>> trying to extend my math (for use with python) skills in this area.
> 
> Ah, sorry.  I had realized I wasn't explicit in my first message.

Yes, I wasn't trying to correct you.  I'm sorry if it came across that way.


> Yes, a perfectly fine integration.

There's still something about it that bothers me.  I think it may be the 
n=100 rather than delta='.0001', or some other way to specify the minimal 
error.  (Yes, it's a bit off topic.)


> You can then (and this is a major jump to get used to):
>      import functools
> 
>      Sine = functools.partial(integrate, math.cos, 0.0, n=100)

I haven't played around with .partial yet.  I wonder if it could be used in 
dispatching situations where the function signatures differ?


> Similarly, you can define a derivative that will behave fairly well,
> all without examining the definition of the function being operated
> upon.

I'll get around to doing that at some point. ;-)


I also have a class that solves equations that takes a function in a 
similar way.  It uses the same method used by HP calculators to solve TVM 
equations.

Cheers,
    Ron




From paddy3118 at googlemail.com  Sat Sep 15 02:44:32 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Sat, 15 Sep 2007 06:44:32 -0000
Subject: Extended slicing and Ellipsis - where are they used?
In-Reply-To: <fcf551$r71$1@daisy.noc.ucla.edu>
References: <1189699345.436400.233460@g4g2000hsf.googlegroups.com>
	<fcclfe$ur6$1@daisy.noc.ucla.edu>
	<1189751869.773724.165040@w3g2000hsg.googlegroups.com>
	<fcf551$r71$1@daisy.noc.ucla.edu>
Message-ID: <1189838672.495173.19860@y42g2000hsy.googlegroups.com>

On Sep 15, 12:29 am, James Stroud <jstr... at mbi.ucla.edu> wrote:
> Paddy wrote:
> > And the ellipses ... ?
>
> ;)
>
> py> class Bob(dict):
> ...   def __getitem__(self, k, *args, **kwargs):
> ...     if k is Ellipsis:
> ...       return sorted(self.keys())
> ...     else:
> ...       return dict.__getitem__(self, k, *args, **kwargs)
> ...   def __setitem__(self, k, *args, **kwargs):
> ...     if k is Ellipsis:
> ...       raise KeyError, "Can't make elliptical assignments."
> ...     else:
> ...       return dict.__setitem__(self, k, *args, **kwargs)
> ...
> py> b = Bob(a=1, b=2, c=3, d=15.5)
> py> b
> {'a': 1, 'b': 2, 'c': 3, 'd': 15.5}
> py> for k in b[...]:
>    print '%s ==> %s' % (k, b[k])
> ...
> a ==> 1
> b ==> 2
> c ==> 3
> d ==> 15.5
> py> b[...] = 2
> ------------------------------------------------------------
> Traceback (most recent call last):
>    File "<ipython console>", line 1, in <module>
>    File "<ipython console>", line 9, in __setitem__
> <type 'exceptions.KeyError'>: "Can't make elliptical assignments."

Thanks again James.



From steve at holdenweb.com  Sun Sep 16 15:22:49 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 16 Sep 2007 15:22:49 -0400
Subject: Try this
In-Reply-To: <1189969529.652871.19280@50g2000hsm.googlegroups.com>
References: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>	<13eqsdfsfvsa16f@corp.supernews.com>
	<1189969529.652871.19280@50g2000hsm.googlegroups.com>
Message-ID: <fcjvq8$bp$1@sea.gmane.org>

mensanator at aol.com wrote:
> On Sep 16, 1:10?pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
>> On Sun, 16 Sep 2007 01:46:34 -0700, GeorgeRXZ <george... at gmail.com>
>> declaimed the following in comp.lang.python:
>>
>>> Then Open the Notepad and type the following sentence, and save the
>>> file and close the notepad. Now reopen the file and you will find out
>>> that, Notepad is not able to save the following text line.
>>> Well you are speed
>>> This occurs not only with above sentence but any sentence that has
>>> 4 3 3 5 (sequence of characters: Well=4 you=3 are=3 speed=5)
>>         I tried. I also opened the saved file in SciTE...
>> And the text WAS there...
>>
>>         It is Notepad that can not properly render what it,
>> itself, saved.
> 
> C:\Documents and Settings\mensanator\My Documents>type huh.txt
> Well you are speed
> 
> Yes, file was saved correctly.
> But reopening it shows 9 unprintable characters.
> If I copy those to a new file (huh1.txt):
> 
> C:\Documents and Settings\mensanator\My Documents>type huh1.txt
> ?????????
> 
> But wait...the new file is 20 characters, not 9.
> 
> 09/16/2007  01:44 PM                18 huh.txt
> 09/16/2007  01:54 PM                20 huh1.txt
> 
> C:\Documents and Settings\mensanator\My Documents>dump huh.txt
> huh.txt:
> 00000000  5765 6c6c 2079 6f75 2061 7265 2073 7065 Well you are spe
> 00000010  6564                                    ed
> 
> Here's what it's actually doing:
> 
> C:\Documents and Settings\mensanator\My Documents>dump huh1.txt
> huh1.txt:
> 00000000  fffe 5765 6c6c 2079 6f75 2061 7265 2073 .~Well you are s
> 00000010  7065 6564                               peed
> 
> 
One word: Unicode.

The "open" and "save" dialogs allow you to specify an encoding. If you 
specify Unicode the you will get what you see above. If you specify ANSI 
you will get the text you entered.

By the way, this has precisely what to do with Python?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From mridula.ccpl at gmail.com  Sat Sep 29 00:43:53 2007
From: mridula.ccpl at gmail.com (Mridula Ramesh)
Date: Sat, 29 Sep 2007 10:13:53 +0530
Subject: Bug: spurious indentation error
Message-ID: <33dffc910709282143y76151e66r2f8641ed2972661a@mail.gmail.com>

Hi.

Lol, nope, I checked today too, and it happened again. Try running this as a
script, not from the prompt -

class main():
    def __init__(self):
        rt.geometry("680x600")
        rt.config(bg="CornSilk")
        rt.title("my miniscule app")
        #MENU--------
        menu = Menu(rt)
        rt.config(menu=menu)
        # create a menu
        filemenu = Menu(menu), bg="White") #syntax error/ typo in this line.
        menu.add_cascade(label="Options", menu=filemenu)
        filemenu.add_command(label="Add New")#, command=callback)
        filemenu.add_command(label="Edit")
        filemenu.add_command(label="Delete")
        filemenu.add_separator()
        filemenu.add_command(label="Exit")
        self.dbConnect()
        self.nowgather(gctr)
        self.showfixed()
        self.showrecords()

    def dbConnect(self): #error gets thrown here as a tab-space indentation
error.
        #connects to database D:/Catalogue.mdb, and gathers all data in a
recordset
        #called rs. Puts this information into individual lists by field
name
        global gmax
        #setting record count to zero afresh.
        import win32com.client
        conn = win32com.client.Dispatch('ADODB.Connection')
        DSN = 'PROVIDER=Microsoft.Jet.OLEDB.4.0; DATA
SOURCE=D:/Catalogue.mdb;'
        conn.Open(DSN)
        rs = win32com.client.Dispatch('ADODB.Recordset')
        rs_name="MyRecordSet"
        rs.Cursorlocation = 3
        rs.Open('SELECT * FROM Library', conn)
        gmax = rs.RecordCount


Regards,
Mridula.


--------------------------------------------------------------------------------------------------------
This is probably a bug in your mind, not in the compiler ;-)

Without more detail (i.e. the complete code or a sizable and relevant
chunk of it, pkus the copied error message) it's impossible to say
exactly what was happening. However I am pretty confident that the
2.5.21 compiler will immediately report an unopened closing parenthesis
as a syntax error.

 >>> something = "abc".replace("c"), "d")
  File "<stdin>", line 1
    something = "abc".replace("c"), "d")
                                       ^
SyntaxError: invalid syntax
 >>>

So, what was the problem again? Give us a little more detail,  please.

regards
 Steve
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From wizzardx at gmail.com  Wed Sep 12 06:36:21 2007
From: wizzardx at gmail.com (David)
Date: Wed, 12 Sep 2007 12:36:21 +0200
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <18c1e6480709120334g6f9d7615jaf9826ee9d6951a8@mail.gmail.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<18c1e6480709120334g6f9d7615jaf9826ee9d6951a8@mail.gmail.com>
Message-ID: <18c1e6480709120336g715f91crcf7fea06ec04b1f6@mail.gmail.com>

On 9/12/07, David <wizzardx at gmail.com> wrote:
> > Please help if I am missing something -- this looks like a great
> > language but I am going to mad trying to read numerical code full of
> > 'self.'s breaking up the equations.
>
> You could try this in your functions:
>
> s = self
>
> Then you can use code like this: s.a_dot = s.k(s.a-s.u)
>
> Another option, if you use the vars a lot in a given function, is to
> copy them to local vars. This can also slightly speed up your code
> (fewer member lookups).
>

Also, there is no rule saying you need to use "self", it's just a
convention. You can declare your methods like this instead:

def foo(s, arg1, arg2):
  s.a_dot = s.k(s.a-s.u)


From steve at holdenweb.com  Tue Sep  4 19:11:18 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 04 Sep 2007 16:11:18 -0700
Subject: parameter list notation
In-Reply-To: <1188943564.291412.16000@50g2000hsm.googlegroups.com>
References: <1188882028.165803.316540@r34g2000hsd.googlegroups.com>	<1188882641.899594.212400@22g2000hsm.googlegroups.com>	<13drhdial6p58ca@corp.supernews.com>
	<1188943564.291412.16000@50g2000hsm.googlegroups.com>
Message-ID: <fbkomn$c5l$1@sea.gmane.org>

TheFlyingDutchman wrote:
> On Sep 4, 1:53 pm, Steven D'Aprano <st... at REMOVE-THIS-
> cybersource.com.au> wrote:
>> On Mon, 03 Sep 2007 22:10:41 -0700, TheFlyingDutchman wrote:
>>> Well I did a search on "Python variable length arguments" and found a
>>> hit that seems to explain the *fields parameter:
>>> When you declare an argment to start with '*', it takes the argument
>>> list into an array.
>> No it doesn't.
>>
>>>>> def test(*args):
>> ...     import array
>> ...     assert type(args) is array.array, "Not an array"
>> ...>>> test(1, 2, 3)
>>
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in <module>
>>   File "<stdin>", line 3, in test
>> AssertionError: Not an array
> 
> Oh, I forgot the context of the discussion! As you are well aware, my
> Python fork() (which I am now calling PIEthun 3.01 in beta and PIEthun
> 3000 upon release) has made a few changes. Tuples are known as arrays.
> Lists are known as uarrays (for updatable array) and the array module
> has been renamed to homo_uarray (homogenous_updatable_array was just
> too much typing).
> 
> In the future I will be sure to specify the context of my statements -
> whether PIEthunic or Pythonic in nature.
> 
> 
Perhaps you could move further discussions to comp.lang.piethun?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From massonmousson at gmail.com  Thu Sep 13 21:05:15 2007
From: massonmousson at gmail.com (Thierry Masson)
Date: Thu, 13 Sep 2007 18:05:15 -0700
Subject: Extending Python with C API
Message-ID: <c69d11d00709131805j1c39dc1w47ec39e914a72191@mail.gmail.com>

Hello,

I'm trying to use the C API to extend Python. I've looked at various books
and web sites (including the docs at python.org) and I can't get any of the
samples to work. Below is a very minimalist example that I'm trying to get
working and I was wondering if someone could tell me where I'm going wrong.
It's probably something very obvious to those familiar with this technique.

gtestmodule.c:
--------------------
#include "Python.h"

int GetInt(int iVal)
{
    return iVal;
}

char* GetString(void)
{
    return "This is the message";
}

PyObject* gtestmodule_GetInt(PyObject* pSelf, PyObject* pArgs)
{
    int x = 0;
    if (!PyArg_ParseTuple(pArgs, "i", &x))
        return NULL;
    GetInt(x);
    return PyBuildValue("i", x);
}

PyObject* gtestmodule_GetString(PyObject* pSelf, PyObject* pArgs)
{
    char* szMsg = GetString();
    return PyBuildValue("s", szMsg);
}

static PyMethodDef gtestmoduleMethods[] =
{
    {"GetInt", gtestmodule_GetInt, METH_VARARGS, "Description goes here"},
    {"GetString", gtestmodule_GetString, METH_VARARGS, "Description goes
here"},
    {NULL, NULL}
};

setup.py:
------------
from distutils.core import setup, Extension
setup(name = "gtestmodule",
      version = "1.0",
      maintainer = "thierry masson",
      maintainer_email = "blah at blah.com",
      description = "test module",
      ext_modules = [Extension("gtestmodule",["gtestmodule.c"])],
     )

test.py:
----------
import gtestmodule
print gtestmodule.GetInt(36);
print gtestmodule.GetString();

The setup script builds the library OK, and I've verified that
gtestmodule.so is getting created. But when I try to run a test script (
test.py, above) that uses the library, I get this error:

Traceback (most recent call last):
  File "test.py", line 2, in ?
    import gtestmodule
ImportError: ./gtestmodule.so: undefined symbol: PyBuildValue

The OS is Red Hat Enterprise Linux ES release 3 (Taroon Update 8), and the
Python version is 2.2.3 (rather old, I know, but I don't control the server
environment and my sysadmin tells me this is the most recent version of
Python officially supported by Red Hat.

Can anyone see where I'm going wrong?

Thanks!

Thierry
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From p at ulmcnett.com  Fri Sep  7 14:47:10 2007
From: p at ulmcnett.com (Paul McNett)
Date: Fri, 07 Sep 2007 11:47:10 -0700
Subject: Python and Cron
In-Reply-To: <a9f39a410709071024u3e669bafu128e8e88c64e072c@mail.gmail.com>
References: <a9f39a410709071024u3e669bafu128e8e88c64e072c@mail.gmail.com>
Message-ID: <46E19CAE.10205@ulmcnett.com>

Greg Lindstrom wrote:
> This may be more of a Linux question, but I'm hoping some of you may be 
> able to help me.
> 
> I have a python (2.4) routine running on Gentoo Linux.  It creates a 
> file and, after the file is complete, renames the file using the 
> os.rename() command.  When I run the file from the command line 
> everything works great, but when I schedule the job to run from the 
> crontab file, the original file is created and populated, but the rename 
> fails.  I am using full paths for both the original and destination 
> file, and run the command line version after I 'su' to the production 
> account (named 'edith').  I am told by my sysadmin that the cron jobs 
> run as edith as well, so he does not think it is a permission issue (he 
> points out the original file is being created and populated as 
> expected...the rename fails)
> 
> Have any of you dealt with anything like this?  It really has me 
> scratching my head.

Can you post the Python script?

What's the name of the original file, and what are you trying to rename 
it to? I'm wondering if you are deriving the new name from something, 
and that thing is failing from within the cronjob for some reason. 
Perhaps the new name contains a complete path in one of the cases but 
not in the other...

Edith should be getting email (if email routing is set up correctly) if 
the job is failing or producing output. Specifically, perhaps she's 
getting Python tracebacks and not telling you... :)



-- 
pkm ~ http://paulmcnett.com


From maxim.gavrilov at gmail.com  Mon Sep 24 14:26:04 2007
From: maxim.gavrilov at gmail.com (Vircom)
Date: Mon, 24 Sep 2007 11:26:04 -0700
Subject: Small changes in side library
In-Reply-To: <mailman.952.1190582159.2658.python-list@python.org>
References: <1190509647.227883.226460@d55g2000hsg.googlegroups.com>
	<mailman.952.1190582159.2658.python-list@python.org>
Message-ID: <1190658364.739221.39030@k79g2000hse.googlegroups.com>

On Sep 24, 1:16 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Sat, 22 Sep 2007 22:07:27 -0300, maxim.gavri... at gmail.com
> <maxim.gavri... at gmail.com> escribi?:
>
>
>
> > I have the side library which provides wide set of different
> > functions, but I'm going to replace some of them with mine and
> > provided such 'modified' library thought my project.
>
> > The following way works well for my purpose:
>
> > ------- mylib.py -------
> > import sidelib
>
> > import os, sys, ....
>
> > def func():
> >     .....
> > sidelib.func = func
> > ......
> > ?!?!?!?!
> > --------------------------
>
> > But this cause to write mylib.sidelib.func() to function call, is it
> > any way to 'map' definitions from sidelib to mylib (possible at point
> > marked ?!?!?!?!) such that constructions like mylib.func() will be
> > provided and client code don't see difference between changed and
> > original library in syntax way?
>
> Your code already works as you like:
> import sidelib
> sidelib.func()
> and you get the modified function.
>
> You don't have to say mylib.sidelib.func - in fact, mylib.sidelib is the
> same module object as sidelib
> But you have to ensure that the replacing code (mylib.py) runs *before*
> anyone tries to import something from sidelib.
>
> > One my idea was to do from sidelib import * and then modify globals()
> > dictionary, but this isn't good too because mylib imports many other
> > modules and they all mapped into it's namespace (like mylib.os,
> > mylib.sys).
>
> As you said, a bad idea.
>
> --
> Gabriel Genellina

Thank you for reply!
I make a mistake in my problem description, because I'm going not only
use my own functions (it'll be simple import library question), but
also using side library many functions (with only a few one replaced
by me). For now I'm stay at the following solution:
----- mylib.py -----
import sidelib
from sidelib import *

_sidelib_set = set(dir(sidelib))
_mylib_set = set(['replacedfunc1', 'replacedfunc2', ....]) # all
exports
__all__ = list(_sidelib_set.union(_mylib_set))

....implementations of _mylib_set functions....
--------------------

Seems it's pretty good for my task, mylib seems fully the same as the
sidelib one.

Thanks for you attention, anyway!



From gagsl-py2 at yahoo.com.ar  Tue Sep 25 16:40:20 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 25 Sep 2007 17:40:20 -0300
Subject: Python script to optimize XML text
References: <496954360709241336i43173947sda5245c2d7477ecb@mail.gmail.com>
	<mailman.1018.1190687230.2658.python-list@python.org>
	<46F8B985.7000803@web.de>
	<496954360709250743t6eec0d51x6d713a97317e6260@mail.gmail.com>
Message-ID: <op.ty781io0x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Tue, 25 Sep 2007 11:43:03 -0300, Robert Dailey <rcdailey at gmail.com>  
escribi?:

> Thanks for everyone's input. I wanted to learn regular expressions,  
> however
> I'm finding them to be quite evil. I think I've learned that it's always  
> a
> good idea to make regex a very LAST resort. This is my opinion I'm
> developing on. In any case, I like the ideas mentioned here concerning  
> using
> the XML parser to do the job for me. Thanks again everyone, I think I'll  
> be
> going with the XML parser to do what I need.

So you get by yourself to the truth of this famous quote:

	Some people, when confronted with a problem, think
	?I know, I'll use regular expressions.?   Now they have two problems.
	(Jamie Zawinski)

-- 
Gabriel Genellina



From tjreedy at udel.edu  Thu Sep 20 14:01:20 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 20 Sep 2007 14:01:20 -0400
Subject: Sets in Python
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com><CeB*qHeVr@news.chiark.greenend.org.uk><1190235483.412972.81280@v23g2000prn.googlegroups.com><_cmIi.3452$ZA5.919@nlpi068.nbdc.sbc.com><1190286192.103681.235270@w3g2000hsg.googlegroups.com>
	<4866bea60709201012x30fc0285j9c07dda2a1991d16@mail.gmail.com>
Message-ID: <fcuch9$sl$1@sea.gmane.org>


"Chris Mellon" <arkanes at gmail.com> wrote in message 
news:4866bea60709201012x30fc0285j9c07dda2a1991d16 at mail.gmail.com...
| On 9/20/07, Dustan <DustanGroups at gmail.com> wrote:
| > On Sep 19, 10:58 pm, Bryan Olson <fakeaddr... at nowhere.org> wrote:
| > > Bad news: Python 3000 has no immutable type for byte-strings.
| > > The new bytes type cannot serve for dict keys or set members.
| > > Many things one would want to hash are unhashable -- for
| > > example, the results of the hash functions in hashlib.
| >
| > Are you serious????
| >
|
| It's a little Chicken Little. The current version of py3k has no
| immutable bytes type, but there's work being done even as we speak to
| implement it.

To reinforce this comment: CPython3.0 will not be released for at least 9 
months.  The current 3.0.a1 is openly *experimental*.  3.0.a2 should be 
released within a few weeks with an invitation for anyone concerned with 
the final product to experiment with it.

GvR's development strategy has been to start small and add what is clearly 
useful (rather than start large and trim).  3.0 is being trimmed bit. 
Where too much is trimmed, something can get added back. 





From eduardo.padoan at gmail.com  Thu Sep 13 10:34:37 2007
From: eduardo.padoan at gmail.com (Eduardo O. Padoan)
Date: Thu, 13 Sep 2007 11:34:37 -0300
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <46e94623$0$30375$9b4e6d93@newsspool4.arcor-online.net>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189666095.727426.135170@o80g2000hse.googlegroups.com>
	<1189685403.306218.13270@22g2000hsm.googlegroups.com>
	<13eigagsuk74l55@corp.supernews.com>
	<46e94623$0$30375$9b4e6d93@newsspool4.arcor-online.net>
Message-ID: <dea92f560709130734j551c4167n4153b1c65fb544b9@mail.gmail.com>

On 9/13/07, Wildemar Wildenburger <lasses_weil at klapptsowieso.net> wrote:
> because I'm trained to interpret the underscore as a synonym for one
> space. It's not particularly beautiful, but that is probably a matter of
> habituation. And that exact word is probably the reason why I'd still
> use self or s (explained by a comment, because I can get very dumb if I
> have to).

Have you worked with code using gettext functions imported as "_"?
When I see a single underscore as a name, i18n comes to mind.


-- 
http://www.advogato.org/person/eopadoan/
Bookmarks: http://del.icio.us/edcrypt


From fakeaddress at nowhere.org  Mon Sep 10 06:09:34 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Mon, 10 Sep 2007 03:09:34 -0700
Subject: Modul (%) in python not like in C?
In-Reply-To: <13e9iqhmgofasfb@corp.supernews.com>
References: <mailman.294.1189364475.2658.python-list@python.org>
	<TM0Fi.4172$FO2.18@newssvr14.news.prodigy.net>
	<13e9iqhmgofasfb@corp.supernews.com>
Message-ID: <nJ8Fi.2146$Sd4.1926@nlpi061.nbdc.sbc.com>

Dennis Lee Bieber wrote:
> 	The best answer is probably to be found from the definition of
> divmod()

The divmod() function is one of those little delights that reminds
me why I love Python, but I do not think it answers the question
here. The definition of divmod() references the '%' operation, and
not the other way around.

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


>>>> divmod(70, 6)
> (11, 4)
>>>> 6*11 + 4
> 70
>>>> divmod(-70, 6)
> (-12, 2)
>>>> 6 * -12 + 2
> -70

Also:

 >>> divmod(70, -6)
(-12, -2)
 >>> -6*-12 + -2
70

 >>> divmod(-70, -6)
(11, -4)
 >>> -6*11 + -4
-70

> Or in general terms
> 
> (a, b) = divmod(x, y)
> x = y * a + b

> IOWs, the definition of modulo, and the definition of integer division,
> are linked...

Right. Thus given integers x and y, y!=0, Python and C agree:

    x == (y * (x / y)) + (x % y)

The disagreement is how integer division rounds. In C, integer
division rounds toward zero. In Python, integer division rounds
downward.


-- 
--Bryan


From gagsl-py2 at yahoo.com.ar  Mon Sep 24 21:43:40 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 24 Sep 2007 22:43:40 -0300
Subject: execfile and function call
References: <nPOdnfr6xu2vimXbnZ2dnUVZ_tCrnZ2d@comcast.com>
Message-ID: <op.ty6se3fux6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 24 Sep 2007 16:59:52 -0300, Dave Westerman <dlwester at comcast.net>  
escribi?:

> I've got a Jython script where I'm doing an execfile() to pull in a
> small script that contains a function, which I then call.
>
> execfile(app_applscript)
> optionList = createOptionList(applOptions)
>
> When I do this at the global level in my main script, it works just
> fine. However, when I move this code into a function in my main script,
> then it fails, telling me it can't find the function createOptionList().
>
> Traceback (innermost last):
> File "<string>", line 459, in ?
> File "<string>", line 429, in processApplication
> NameError: createOptionList
>
> Does anyone have any idea what I'm doing wrong? I noticed that
> createOptionList no longer shows up when I do a dir(). Do I somehow have
> to get that to be a global? How do I do that?

To answer your specific question: Use execfile(app_applscript, globals())  
instead (see <http://docs.python.org/lib/built-in-funcs.html#l2h-26>)
But I think it would be better to *import* createOptionList from that  
module. Using __import__ or imp may help, but the details are a bit  
different in Jython so I can't help you so much in this regard.


-- 
Gabriel Genellina



From k_r_a_j_kumar at yahoo.co.in  Wed Sep 19 04:50:43 2007
From: k_r_a_j_kumar at yahoo.co.in (Raj kumar)
Date: Wed, 19 Sep 2007 09:50:43 +0100 (BST)
Subject: How to know the starting point
Message-ID: <96489.19792.qm@web8706.mail.in.yahoo.com>

Hi,
I need help regarding the starting point in python project,
As we can find main() function in java class to know the starting class in java,
what is the starting point in python project?
How to find the starting point.
Thank you
       
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From deets at nospam.web.de  Mon Sep 24 08:39:34 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 24 Sep 2007 14:39:34 +0200
Subject: rules from an xml file
References: <1190633685.275142.264540@r29g2000hsg.googlegroups.com>
	<5lpm4dF93534U1@mid.uni-berlin.de>
	<5lpolvF95s07U4@mid.uni-berlin.de>
Message-ID: <5lppg6F90nllU1@mid.uni-berlin.de>

Marc 'BlackJack' Rintsch wrote:

> On Mon, 24 Sep 2007 13:42:05 +0200, Diez B. Roggisch wrote:
> 
>> jonny wrote:
>> 
>>> <rules>
>>>    <rule01>
>>>       <if>
>>> <or>
>>> <lessthan par_1="glicemyAtMorning" par_2="80"/>
>>> <lessthan par_1="glicemyAtNight" par_2="80"/>
>>> <and>
>>> <greaterthan par_1="glicemyAtMorning" par_2="0"/>
>>> <or>
>>> <equalto par_1="urine" par_2="0"/>
>>> <equalto par_1="urine" par_2="+/-"/>
>>> <equalto par_1="urine" par_2="+"/>
>>> </or>
>>> </and>
>>> </or>
>>> </if>
>>>         <then>
>>>            <sendmessage>Something is wrong!</sendmessage>
>>>         </then>
>>>    </rule01>
>>>    <rule02> ...  </rule02>
>>>    <rule03> ...   </rule03>
>>> </rules>
>>> [?]
>> [?]
>> Just a note: the use of "par_X" as attributes is unfortunate, to say the
>> least. It doesn't allow for easy argument swapping, can cause troubles
>> because you delete one attribute and miss renaming the others, and in
>> general it's not good design to have arbitrary numbers of parameters.
> 
> Quite the same is true for numbers in tag names.  If you (the OP) need to
> number the rules better use an attribute for the numbers.

I meant of course

<equalto>
  <param>0</param>
  <param>+</param>
</equalto>

Diez


From deets at nospam.web.de  Thu Sep 20 08:50:10 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 20 Sep 2007 14:50:10 +0200
Subject: I MEANT ONIX.... [it was Re: ONYX]
In-Reply-To: <1190291923.310128.156430@22g2000hsm.googlegroups.com>
References: <1190211769.268351.79500@d55g2000hsg.googlegroups.com>
	<46f1726f$0$15276$426a74cc@news.free.fr>
	<1190282489.824709.29050@r29g2000hsg.googlegroups.com>
	<1190283378.175422.73290@r29g2000hsg.googlegroups.com>
	<46f25191$0$29574$426a34cc@news.free.fr>
	<1190291923.310128.156430@22g2000hsm.googlegroups.com>
Message-ID: <5lf8ktF7v7b7U1@mid.uni-berlin.de>

korovev76 at gmail.com schrieb:
> On 20 Set, 12:55, Bruno Desthuilliers <bruno.
> 42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> 
>> First question : do you *really* need a validating parser ?
>>
> that's what they told me ("they" being "da boss")... I mean: i have to
> validate and to parse... i guess you can't do it at the same time, can
> you?
> 
> 
>> Second question : did you try to google for
>>    "+Python +validating +XML +parser"
> 
> I've already googled it, and found pyRXP... but  I was looking for
> someone/something already experienced with onix...

Well, it's XML with a DTD. Not much to see there. Nobody is going to 
help you generate and/or process it, as the application is _very_ 
domain-specific and unlikely to have some pre-built support libs.

However, using python you should be in an excellent position to create 
one for yourself - and maybe share, if "da boss" allows it.

Diez


From steve at REMOVE-THIS-cybersource.com.au  Tue Sep  4 17:17:09 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Tue, 04 Sep 2007 21:17:09 -0000
Subject: function call
References: <1188937059.459609.61850@57g2000hsv.googlegroups.com>
Message-ID: <13driql1otk1u7a@corp.supernews.com>

On Tue, 04 Sep 2007 13:17:39 -0700, ianar? wrote:

> Hey all,
> 
> Is there a way of printing out how a function was called? In other words
> if I do the following:
> 
> def someFunction(self):
>     self.someOtherFunction(var1, var2)
> 
> 
> I would get something like "someOtherFunction: called by: someFunction,
> args are: var1, var2"

The obvious way is:

def someFunction(self):
    print "someOtherFunction: called by: someFunction," \
    "args are: %s, %s" % (var1, var2)
    self.someOtherFunction(var1, var2)

but that has obvious inconveniences. 

Perhaps you should look at the Python debugger and profiler? Do they 
solve the underlying problem you are trying to solve?



-- 
Steven.


From jura.grozni at gmail.com  Sat Sep 29 14:52:49 2007
From: jura.grozni at gmail.com (azrael)
Date: Sat, 29 Sep 2007 18:52:49 -0000
Subject: wxpython combined with vpython
Message-ID: <1191091969.393341.286380@57g2000hsv.googlegroups.com>

One question. I didn't try it, just one idea
 Is it possible to put a Vpython window inside a WX frame like it is a
part of the wxframe between sizers or anything els



From nagle at animats.com  Wed Sep  5 11:25:05 2007
From: nagle at animats.com (John Nagle)
Date: Wed, 05 Sep 2007 08:25:05 -0700
Subject: FCGI app reloading on every request - solved
In-Reply-To: <nnt*By6Tr@news.chiark.greenend.org.uk>
References: <46DCDE59.8060109@animats.com>
	<MPG.21478b09a5d2650d989710@news.individual.de>
	<qwhDi.23908$eY.9978@newssvr13.news.prodigy.net>
	<nnt*By6Tr@news.chiark.greenend.org.uk>
Message-ID: <46DECA51.8060407@animats.com>

Sion Arrowsmith wrote:
> John Nagle  <nagle at animats.com> wrote:
> 
>>   Tried putting this in the .htaccess file:
>>
>><Files *.fcgi>
>>SetHandler fcgid-script
>>Options ExecCGI
>>allow from all
>></Files>
>>
>><Files *.foo>
>>ErrorDocument 403 "File type not supported."
>></Files>
>>
>>    Even with that, a ".foo" file gets executed as a CGI script,
>>and so does a ".fcgi" file.  It's an Apache configuration problem.
> 
> 
> I'd look to see if you've got a AllowOverride None set somewhere
> unhelpful (probably on the cgi-bin directory, although I note the
> default Apache2 config on my machine here does it for the document
> root too). Mind you, if you're managing this with a web tool rather
> than having access to the Apache config files, it might not be so
> straightforward to do.

     I now know what's wrong; it's a combination of several problems.

     First, configuring Apache via Plesk has very limited options,
and no documentation telling you what it's doing.  The actual
problem is that Plesk generates, in "/etc/conf/httpd.conf".

     ScriptAlias /cgi-bin/ "/var/www/cgi-bin/"

This makes anything in cgi-bin executable with mod-cgi,
regardless of anything set up for any other suffix. For
historical reasons, CGI gets better treatment in Apache than
other "mod-" components, and apparently ScriptAlias outranks
Files and AddHandler.  So that's why .fcgi programs were being
run as .cgi programs.

     With the Plesk-created configuration, an executable ".fcgi" file
in any web-server-visible directory OTHER than "cgi-bin" will execute
with mod_fcgi.  So that's how to get around this.  Note that this is
backwards from the usual CGI configuration, where scripts will execute
only from "cgi-bin".  This has security implications.

     If you're using Plesk, you can't change the defaults, because Plesk
regenerates the config files when you use the Plesk control panel app.
Nor will overrides in .htaccess work; those are disallowed by an
"AllowOverride None".  So you're stuck with what Plesk gives you.
Even on a dedicated server using Plesk.

     Then there's mod_fcgid, which Plesk configures but has almost no
documentation either.  If mod_fcgid can't spawn an application
process, for any reason, including a simple Python error,
the error message is "[warn] mod_fcgid: can't apply process slot for ...".
That's all you get in the Apache log.  The web user gets "Service
Temporarily Unavailable", because mod_fcgid doesn't distinguish
internally between "don't have enough resources to spawn a new process"
and "new process didn't launch correctly".   I had to look at the
source code for mod_fcgid to figure out what it meant.  (Ruby on Rails
people get this message now and then, and they're puzzled by it.)

     So that's what's going on.  This sort of thing is why mod_fcgid,
which is actually a good concept, isn't used much.

				John Nagle



From steve at holdenweb.com  Thu Sep 27 11:54:30 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 27 Sep 2007 11:54:30 -0400
Subject: Cross-platform time out decorator
In-Reply-To: <1190907553.425261.273400@w3g2000hsg.googlegroups.com>
References: <1190802115.585306.250400@o80g2000hse.googlegroups.com>	<1190899882.702911.44670@w3g2000hsg.googlegroups.com>	<87k5qc18gf.fsf@mulj.homelinux.net>
	<1190907553.425261.273400@w3g2000hsg.googlegroups.com>
Message-ID: <fdgjnm$9rl$1@sea.gmane.org>

Joel wrote:
> On Sep 27, 4:36 pm, Hrvoje Niksic <hnik... at xemacs.org> wrote:
>> Joel <joel.schae... at gmail.com> writes:
>>> I found the solution :
>>> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/440569
>>> describes a solution based on threads. I tested it and it works
>>> perfectly.
>> Note that, unlike the original alarm code, it doesn't really interrupt
>> the timed-out method, it just returns the control back to the caller,
>> using an exception to mark that a timeout occurred.  The "timed out"
>> code is still merrily running in the background.  I don't know if it's
>> a problem in your case, but it's an important drawback.
> 
> There should be a method to stop the thread though? I've never
> programmed thread stuff in python and wasn't able to find how to do
> it, would you happen to know how to "kill" the timed out thread?
> 
There is no way to "kill" a thread, other than set a flag and have the 
thread read it to realise the main thread wants it to stop.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From martin at v.loewis.de  Thu Sep 13 02:48:28 2007
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 13 Sep 2007 08:48:28 +0200
Subject: Parallel/Multiprocessing script design question
In-Reply-To: <yK3Gi.61203$Pv4.51195@newsfe19.lga>
References: <yK3Gi.61203$Pv4.51195@newsfe19.lga>
Message-ID: <46e8dd3d$0$16407$9b622d9e@news.freenet.de>

> I tend to ramble, and I am afraid none of you busy experts will bother 
> reading my long post

I think that's a fairly accurate description, and prediction.

> I am hoping people 
> with experience using any of these would chime in with tips. The main thing 
> I would look for in a toolkit is maturity and no extra dependencies. Plus a 
> wide user community is always good. 
> POSH/parallelpython/mpi4py/pyPar/Kamaelia/Twisted I am so confused :(

After reading your problem description, I think you need none of these.
Parallelization-wise, it seems to be a fairly straight-forward task,
with coarse-grained parallelism (which is the easier kind).

> 2. The processing involves multiple steps that each input file has to go 
> through. I am trying to decide between a batch mode design and a pipelined 
> design for concurrency.

Try to avoid synchronization as much as you can if you want a good
speed-up. Have long-running tasks that don't need to interact with
each other, rather than having frequent synchronization. If you
haven't read about Amdahl's law, do so now.

>From your description, it seems that having a single process process an
entire input file, from the beginning to the end, sounds like the right
approach; use the multiple CPUs to process different input files in
parallel (IIUC, they can be processed in any order, and simultaneously).

> In the batched design, all files will be processed 
> on one processing step(in parallel) before the next step is started.

Why that? If you have N "worker" processes, each one should do the
processing at its own rate. I.e. each one does all the steps for a
single file in sequence; no need to wait until all processes have
completed one step before starting the next one.

As for N: don't make it the number of input files. Instead, make it
the number of CPUs, or perhaps two times the number of CPUs. The maximum
speed-up out of k CPUs is k, so it is pointless (and memory-consuming)
to have many-more-than-k worker processes.

> In a pipelined design, each file will be taken through all steps to the end.

Perhaps this is what I suggested above - I would not call it
"pipelined", though, because in pipelining, I would expect that the
separate steps of a pipeline run in parallel, each one passing its
output to the next step in the pipeline. That allows for a maximum
speedup equal to the number of pipeline steps. IIUC, you have many
more input documents than pipeline steps, so parallelizing by input
data allows for higher speedups.

> The subprocess module should allow spawning new processes, 
> but I am not sure how to get status/error codes back from those?

What's wrong with the returncode attribute in subprocess?

> I guess I can forget about communicating with those?

Assuming all you want to know is whether they succeeded or failed: yes.
Just look at the exit status.

> I guess I would need some sort of queuing system here, to submit files 
> to the CPUs properly?

No. You don't submit files to CPUs, you submit them to processes (if
you "submit" anything at all). The operating system will chose a CPU
for you.

If you follow the architecture I proposed above (i.e. one Python
process processes a file from the beginning to the end), you pass
the file to be processed on the command line. If the processing is
fairly short (which I assume it is not), you could have a single
process process multiple input files, one after another (e.g.
process 1 does files 1..400, process 401..800, and so on).

> The other way could be to have each individual file run through all the 
> steps and have multiple such "pipelines" running simultaneously in parallel. 

Ok. See above - I wouldn't call it piplelined, but this is what you
should do.

> It feels like this method will lose cache performance because all the code 
> for all the steps will be loaded at the same time, but I am not sure if I 
> should be worrying about that.

[I assume you mean "CPU cache" here]

You should not worry about it, plus I very much doubt that this actually
happens. The code for all the steps will *not* be loaded into the cache;
that it sits in main memory has no effect whatsoever on cache
performance. You can assume that all the code that runs a single step
will be in the cache (unless the algorithms are very large). OTOH,
the data of a input file will probably not fit in the CPU cache. You
should be worried about reducing disk IO, so all processing of a file
should run completely in memory. For that, it is better if you run an
input file from the beginning to the end - if you would first read
all 800 files, decompress them, then likely the output will not
fit into the disk cache, so the system will have to read the compressed
data from disk in the next step.

Regards,
Martin


From zzbbaadd at aol.com  Tue Sep  4 18:06:04 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Tue, 04 Sep 2007 15:06:04 -0700
Subject: parameter list notation
In-Reply-To: <13drhdial6p58ca@corp.supernews.com>
References: <1188882028.165803.316540@r34g2000hsd.googlegroups.com>
	<1188882641.899594.212400@22g2000hsm.googlegroups.com>
	<13drhdial6p58ca@corp.supernews.com>
Message-ID: <1188943564.291412.16000@50g2000hsm.googlegroups.com>

On Sep 4, 1:53 pm, Steven D'Aprano <st... at REMOVE-THIS-
cybersource.com.au> wrote:
> On Mon, 03 Sep 2007 22:10:41 -0700, TheFlyingDutchman wrote:
> > Well I did a search on "Python variable length arguments" and found a
> > hit that seems to explain the *fields parameter:
>
> > When you declare an argment to start with '*', it takes the argument
> > list into an array.
>
> No it doesn't.
>
> >>> def test(*args):
>
> ...     import array
> ...     assert type(args) is array.array, "Not an array"
> ...>>> test(1, 2, 3)
>
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "<stdin>", line 3, in test
> AssertionError: Not an array

Oh, I forgot the context of the discussion! As you are well aware, my
Python fork() (which I am now calling PIEthun 3.01 in beta and PIEthun
3000 upon release) has made a few changes. Tuples are known as arrays.
Lists are known as uarrays (for updatable array) and the array module
has been renamed to homo_uarray (homogenous_updatable_array was just
too much typing).

In the future I will be sure to specify the context of my statements -
whether PIEthunic or Pythonic in nature.




From kyosohma at gmail.com  Mon Sep 10 10:15:40 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 10 Sep 2007 07:15:40 -0700
Subject: wxPython unexpected exit
In-Reply-To: <1189272447.892980.282380@r29g2000hsg.googlegroups.com>
References: <1189152617.169438.296630@d55g2000hsg.googlegroups.com>
	<1189172540.784080.231440@22g2000hsm.googlegroups.com>
	<1189272447.892980.282380@r29g2000hsg.googlegroups.com>
Message-ID: <1189433740.882996.15220@57g2000hsv.googlegroups.com>

Hi,

> Thanks for your help! It seems work!
> Another question: I create a progress bar, and on creation, it will be
> displayed,
> How can I invisualize it when later I no longer need it?

I think this is also a good way to use threads. Take a look at the
wxPython demo for the ProgressDialog code. Basically, you run it in a
loop and communicate with it every so often to tell it your progress.
When you're done, you can set some sentinel type value which would
kill the dialog.

I've never used it, but that's how I understand its usage. As I
mentioned, you should consider posting these types of questions to the
wxPython group: http://www.wxpython.org/maillist.php

Mike



From hniksic at xemacs.org  Thu Sep 27 10:36:32 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Thu, 27 Sep 2007 16:36:32 +0200
Subject: Cross-platform time out decorator
References: <1190802115.585306.250400@o80g2000hse.googlegroups.com>
	<1190899882.702911.44670@w3g2000hsg.googlegroups.com>
Message-ID: <87k5qc18gf.fsf@mulj.homelinux.net>

Joel <joel.schaerer at gmail.com> writes:

> I found the solution :
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/440569
> describes a solution based on threads. I tested it and it works
> perfectly.

Note that, unlike the original alarm code, it doesn't really interrupt
the timed-out method, it just returns the control back to the caller,
using an exception to mark that a timeout occurred.  The "timed out"
code is still merrily running in the background.  I don't know if it's
a problem in your case, but it's an important drawback.


From bignose+hates-spam at benfinney.id.au  Tue Sep 18 21:46:29 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 19 Sep 2007 11:46:29 +1000
Subject: [ANN] Metatest 0.1.0
References: <mailman.721.1190126947.2658.python-announce-list@python.org>
	<87sl5by343.fsf@benfinney.id.au> <46F0633E.7020304@pytex.org>
Message-ID: <87d4wfxw96.fsf@benfinney.id.au>

[Jonathan, please don't send me copies of messages sent to the
discussion thread. I follow comp.lang.python via a non-mail interface,
and it's irritating to get unwanted copies of messages via email.]

Jonathan Fine <jfine at pytex.org> writes:

> Ben Finney wrote:
> > Jonathan Fine <jfine at pytex.org> writes:
> >>    plus(2, '', _ex=TypeError)
> >
> > This second example seems counterintuitive. Is '_ex' part of the
> > public interface? If so, why does it follow the convention for
> > "not part of the public interface" (i.e. it is named with an
> > underscore)?
> 
> [...]
> The line
>      plus(2, '', _ex=TypeError)
> causes something to be recorded, and when the test is run the _ex
> argument is filtered off, and the remaining arguments passed to the
> plus function, as imported from mymod.

That's confusing, then, for two reasons:

It looks like '_ex' is an argument to the 'plus' function, which
otherwise (probably by design) looks exactly like a call to the 'plus'
function the programmer is testing. Since this is, instead, an
assertion *about* that function, it is misleading to see it as an
argument *to* the function.

It uses the "leading-underscore" convention which means "this is not
part of the public interface, and you'd better know what you're doing
if you use this externally".

> Finally, if you can think of a better way of saying, in Python, "The
> function call plus(2, '') raises a TypeError", please let me know,
> and I'll consider using it in the next version of Metatest.

I would think an explicit function call that says what it's doing
would be better. The unittest module implements this as:

    self.failUnlessRaises(TypeError, plus, 2, '')

or more generally:

    func = plus
    func_args = [2, '']
    self.failUnlessRaises(TypeError, func, *func_args)

which has the benefit of being explicit about what it's doing.

-- 
 \                     "Sometimes I -- no, I don't."  -- Steven Wright |
  `\                                                                   |
_o__)                                                                  |
Ben Finney


From larry.bates at websafe.com  Tue Sep 25 12:23:04 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 25 Sep 2007 11:23:04 -0500
Subject: comparing elements of a list with a string
In-Reply-To: <1190734785.439839.303030@50g2000hsm.googlegroups.com>
References: <1190734785.439839.303030@50g2000hsm.googlegroups.com>
Message-ID: <XLSdnddmo6KUq2TbnZ2dnUVZ_vShnZ2d@comcast.com>

Shriphani wrote:
> Hello all,
> I have a problem here. I have a list named list_of_files which
> contains filenames with their timestamps attached to the name. If I
> have a string "fstab", and I want to list out the files in whose names
> the word fstab appears should I go about like this :
> 
> def listAllbackups(file):
>     list_of_files = os.listdir("/home/shriphani/backupdir")
>     for element in list_of_files:
>          if element.find(file) != -1:
>              date = ###
>              time = ####
>               return (date, time)
> 
> The major trouble is that the return statement causes it to exit after
> attempt one. How do I use the yield statement here?
> 
> Regards,
> Shriphani Palakodety
> 

You should take a quick look at glob().  You may be able to use it to make life 
a lot easier.  Here is how you would do it if all your backup files begin with
fstab.

import glob
list_of_backup_files=glob.glob('/home/shriphani/backupdir/glob*')

If "fstab" can appear anywhere in the filename, this might not work for you.

-Larry


From bbxx789_05ss at yahoo.com  Fri Sep  7 19:13:13 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Fri, 07 Sep 2007 16:13:13 -0700
Subject: why should I learn python
In-Reply-To: <mailman.202.1189135284.2658.python-list@python.org>
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
	<mailman.189.1189118213.2658.python-list@python.org>
	<87zlzzs9by.fsf@wilson.homeunix.com>
	<13e1e52cfb1u505@corp.supernews.com>
	<mailman.202.1189135284.2658.python-list@python.org>
Message-ID: <1189206793.284959.264040@19g2000hsx.googlegroups.com>

On Sep 6, 9:20 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Thu, 06 Sep 2007 23:34:10 -0300, Grant Edwards <gra... at visi.com>  
> escribi?:
>
> > On 2007-09-06, Torsten Bronger <bron... at physik.rwth-aachen.de> wrote:
> >> Hall?chen!
>
> >> Tom Brown writes:
>
> >>> [...] Python has been by far the easiest to develop in.  Some
> >>> people might say it is not "real programming" because it is so
> >>> easy.
>
> >> I can't believe this.  Have you really heard such a statement?
>
> > Maybe it's a allusion to that fake Stroustrup interview where
> > he supposedly explains that C++ was meant to be a difficult
> > language to use as a means to keep more programmers employed at
> > higher salaries?
>
> I always thought the only goal of the C++ standard comittee was to devise  
> the most intrincate and convoluted rule ever imaginable.
> It's like playing AD&D: the basic manual says something, but The Book Of  
> The Perfect And Sublime Elf says that in this case this other rule  
> applies, but a warrior Elf can read in The Ultimate And Most Complete  
> Warrior Companion a totally different rule, but the character's alignment  
> forbids all the three possibilities...
>
> --
> Gabriel Genellina

Ha, ha, ha!  lol. :)



From paul.hankin at gmail.com  Tue Sep 25 15:02:48 2007
From: paul.hankin at gmail.com (Paul Hankin)
Date: Tue, 25 Sep 2007 19:02:48 -0000
Subject: Script to extract text from PDF files
In-Reply-To: <fdbh95$smc$1@solaris.cc.vt.edu>
References: <fdbh95$smc$1@solaris.cc.vt.edu>
Message-ID: <1190746968.162359.39890@r29g2000hsg.googlegroups.com>

On Sep 25, 6:41 pm, brad <byte8b... at gmail.com> wrote:
> I have a very crude Python script that extracts text from some (and I
> emphasize some) PDF documents. On many PDF docs, I cannot extract text,
> but this is because I'm doing something wrong. The PDF spec is large and
> complex and there are various ways in which to store and encode text. I
> wanted to post here and ask if anyone is interested in helping make the
> script better which means it should accurately extract text from most
> any pdf file... not just some.
>
> I know the topic of reading/extracting the text from a PDF document
> natively in Python comes up every now and then on comp.lang.python...
> I've posted about it in the past myself. After searching for other
> solutions, I've resorted to attempting this on my own in my spare time.
> Using apps external to Python (pdftotext, etc.) is not really an option
> for me. If someone knows of a free native Python app that does this now,
> let me know and I'll use that instead!

Googling for 'pdf to text python' and following the first link gives
http://pybrary.net/pyPdf/

--
Paul Hankin



From mbrown at phys.ksu.edu  Mon Sep 10 23:15:40 2007
From: mbrown at phys.ksu.edu (yagyala)
Date: Mon, 10 Sep 2007 20:15:40 -0700
Subject: pipes
Message-ID: <1189480540.812171.285820@r34g2000hsd.googlegroups.com>

Hi. I'm rtying to use pipes to communicate between a python GUI and a
spawned C++ program. I prefer not to use forking because the app may
be run on windows, where forking isn't supported. Roughly what I'm
doing is:

(r,w) = os.pipe()
spawnl(P_WAIT, 'tool.exe', ' ', message, str(w))
close(w)
print os.read(r, 1000)

In c++ ,
...
int main(int argc, char** argv)
{

}



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Sep 10 07:36:17 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 10 Sep 2007 13:36:17 +0200
Subject: less obvious "super"
References: <1189417830.645749.226120@d55g2000hsg.googlegroups.com>
Message-ID: <5kkohhF49338U1@mid.individual.net>

Nagarajan wrote:
> class A :
>     def __init__( self ):
>         self.x  = 0
> 
> class B ( A ):
>     def __init__( self, something ):
>         # Use "super" construct here so that I can "inherit" x of
>         # A
>         self.y  = something
> 
> How should I use "super" so that I could access the variable "x"
> of A in B?

Since you're neither using new-style classes (inheriting from
object) nor multiple inheritance, better use the classic way:

class B(A):
    def __init__(self, something):
        A.__init__(self)
        self.y  = something

IMHO, you could also benefit from looking at an OO python tutorial
since this is a standard approach.

Regards,


Bj?rn

-- 
BOFH excuse #145:

Flat tire on station wagon with tapes.  ("Never underestimate the
bandwidth of a station wagon full of tapes hurling down the
highway" Andrew S. Tannenbaum) 



From aclarke11 at yahoo.co.uk  Wed Sep 12 15:05:06 2007
From: aclarke11 at yahoo.co.uk (Tony)
Date: Wed, 12 Sep 2007 12:05:06 -0700
Subject: Tkinter pack difficulty
In-Reply-To: <1189617737.700363.187450@g4g2000hsf.googlegroups.com>
References: <1189617737.700363.187450@g4g2000hsf.googlegroups.com>
Message-ID: <1189623906.451500.111900@d55g2000hsg.googlegroups.com>

On Sep 12, 6:22 pm, Simon Forman <sajmik... at gmail.com> wrote:
> Hi all,
>
>Snip> Any thoughts or advice?
>
> Thanks in advance,
> ~Simon
>

This seems to do what you want, the difference is that the expand
option is left out top and bottom, also I increased height and put in
a width value as well:
from Tkinter import *

t = Tk()

header = Frame(t, bg="black", height=30, width = 10)
header.pack(fill=X, side=TOP, anchor=N)

body = Frame(t, bg="grey")
body.pack(expand=1, fill=BOTH, anchor=CENTER)

log = Frame(t, bg="white", height=30, width = 10)
log.pack( fill=X, side=BOTTOM, anchor=S)

t.mainloop()

Ciao
Tony



From koutoo at hotmail.com  Mon Sep 17 11:31:13 2007
From: koutoo at hotmail.com (koutoo at hotmail.com)
Date: Mon, 17 Sep 2007 08:31:13 -0700
Subject: Use GUI for Python
Message-ID: <1190043073.093736.272750@k79g2000hse.googlegroups.com>

I am new to python as I have been a VB programmer.  I am used to the
GUI interface, and was wondering if I had to choose between a GUI for
Python, which one should I go with?  Thanks.

Kou



From rrr at ronadam.com  Fri Sep 21 03:32:00 2007
From: rrr at ronadam.com (Ron Adam)
Date: Fri, 21 Sep 2007 02:32:00 -0500
Subject: Python 3K or Python 2.9?
In-Reply-To: <1190053757.091035.221570@22g2000hsm.googlegroups.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>	<46e7974d$0$31726$426a74cc@news.free.fr>	<fc8fc9$4qa$1@news2.carnet.hr>
	<5kq1hgF4r90oU1@mid.individual.net>	<1189618530.872819.136450@57g2000hsv.googlegroups.com>	<uir6ctto7.fsf@yahoo.com>	<1190013827.107324.111820@w3g2000hsg.googlegroups.com>	<mailman.645.1190026962.2658.python-list@python.org>
	<1190053757.091035.221570@22g2000hsm.googlegroups.com>
Message-ID: <46F37370.9040809@ronadam.com>



TheFlyingDutchman wrote:

> I am not talking about the way it does it, but rather, the way it
> could do it or... could have done it. That requires no knowledge of
> how the interpreter currently does it unless I am proposing something
> that no interpreter in the world could ever do.

Yes, there are a couple of things that could have been changed. But from 
what I can tell there are a number of reasons why things where chosen to be 
the way they are.

Two of those reasons is to make the core C code smaller and easier to 
maintain and also to make it easier to understand how things work. 
Exposing the inner workings as visible python code vs hidden C code helps 
both of those.

Another benefit of exposing more of the class machinery of Pythons objects 
as python code, is it makes it possible to modify more of how things work 
directly with python code.  A good way to see how this works is studying 
how descriptors and properties work.

     http://users.rcn.com/python/download/Descriptor.htm

You will find there is much more of python written in python than it may 
first seem.  In some cases the built in classes and modules are written in 
C, yet they still work as if they are written in Python.

So if you can find a way to do things like removing self in python in such 
a way that it doesn't require adding more to the Core interpreter, then it 
might be considered.

What I've found is as my skills improve, I take more advantage of being 
able to modify and/or introspect how things work.  This allows more choices 
on how I might solve a particular problem.

I also think there a lots of improvements that could be made to other parts 
of python such as the libraries that would be of much more practical benefit.

Regards,
    Ron


From python.list at tim.thechases.com  Sun Sep 30 14:22:10 2007
From: python.list at tim.thechases.com (Tim Chase)
Date: Sun, 30 Sep 2007 13:22:10 -0500
Subject: code for number guessing by computer
In-Reply-To: <1191174817.788812.40360@y42g2000hsy.googlegroups.com>
References: <1191174817.788812.40360@y42g2000hsy.googlegroups.com>
Message-ID: <46FFE952.30302@tim.thechases.com>

> hi, please help me,,,,,, a newbie.......send me code for a programme
> in which the computer tell u the number that u guessed............

I can think of at least two versions of this:

>>> _ = raw_input("Think of an integer greater than 1 and less
than 3")
>>> print "Your number was 2!  This code is teh awesome!"

or, if you need to guess an arbitrary number greater than "N",
you can use this spiffy code:

>>> print "Think of an integer greater than zero and I will guess it"
>>> i = 1
>>> while raw_input("Was your number %i?" % i) <> "yes": i += 1
...

>>> print "I guessed your number correctly!"


Oh...unless this was a homework problem and you were looking for
a standard binary search of a problem-space, in which case,
mailing lists don't generally do your homework for you.
However, the first solution I provided is *far* better than a
boring old binary-search because it solves the problem in O(1)
rather than O(log N)  which any good math wonk will tell you is a
much more efficient algorithm!  :)

-tkc







From dotancohen at gmail.com  Sun Sep  9 20:14:58 2007
From: dotancohen at gmail.com (Dotan Cohen)
Date: Mon, 10 Sep 2007 03:14:58 +0300
Subject: =?UTF-8?Q?Re:_Re=C3=A2=C2=AD:_=C3=A2=C2=ACM?=
	=?UTF-8?Q?odul=C3=A2=C2=AD_(%)_=C3=A2=C2=ACi?=
	=?UTF-8?Q?n_python_not_like_in_C=C3=A2=C2=AD=3F=C3=A2=C2=AC?=
In-Reply-To: <roy-1B651D.15084209092007@news.panix.com>
References: <mailman.294.1189364475.2658.python-list@python.org>
	<roy-1B651D.15084209092007@news.panix.com>
Message-ID: <880dece00709091714w3d1a9d81l6de0ade3ac44d99d@mail.gmail.com>

On 09/09/2007, Roy Smith <roy at panix.com> wrote:
> In article <mailman.294.1189364475.2658.python-list at python.org>,
>  "Dotan Cohen" <dotancohen at gmail.com> wrote:
>
> > FIrst of all, how is the % symbol (as in 70%6=4) called in English?
>
> It's called "modulo", but most people pronounce it "mod".
>
> It's documented at http://docs.python.org/ref/binary.html
>

Thanks, Roy. But it's hard to find when one doesn't know it's name!

Dotan Cohen

http://what-is-what.com
http://gibberish.co.il

--

?-?-?-?-?-?-?-?-?
?-?-?-?-?-?-?-?-?
?-?-?-?-?-?-?-?-?

A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?

From steve at holdenweb.com  Sat Sep  1 00:17:52 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 01 Sep 2007 00:17:52 -0400
Subject: Automation and scheduling of FrontPage publishing using Python
In-Reply-To: <fbamnh$r7q$7@lust.ihug.co.nz>
References: <1188517723.279932.299400@x40g2000prg.googlegroups.com>
	<fbamnh$r7q$7@lust.ihug.co.nz>
Message-ID: <fbap5j$gu4$1@sea.gmane.org>

Lawrence D'Oliveiro wrote:
> In message <1188517723.279932.299400 at x40g2000prg.googlegroups.com>,
> andrew.arobert at gmail.com wrote:
> 
>> We have numerous web sites which are currently being manually
>> published via Front Page.
>>
>> Doing one or two sites on an ad-hoc basis was not too bad but we are
>> now over 20 or thirty at set times during a business day.
> 
> Let me open the bidding by suggesting that you stop using FrontPage.

But that would mean reprogramming the functionality they now implement 
using FrontPage extensions. Any help with that?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From hall.jeff at gmail.com  Sat Sep 29 14:24:53 2007
From: hall.jeff at gmail.com (hall.jeff at gmail.com)
Date: Sat, 29 Sep 2007 18:24:53 -0000
Subject: Program inefficiency?
In-Reply-To: <mailman.1284.1191088565.2658.python-list@python.org>
References: <1191079347.192272.240540@22g2000hsm.googlegroups.com>
	<1191087234.915654.182370@k79g2000hse.googlegroups.com>
	<mailman.1284.1191088565.2658.python-list@python.org>
Message-ID: <1191090293.017485.225470@y42g2000hsy.googlegroups.com>

The search is trying to replace the spaces in our bookmarks (and the
links that go to those bookmarks)...

The bookmark tag looks like this:

<a href="Web_Sites.htm#A Web Sites">

and the bookmark tag looks like this

<a name="A Web Sites"></a>

some pitfalls I've already run up against...
SOMETIMES (but not often) the a and the href (or name) is split across
a line... this led me to just drop the "<a" from the front
If there are no spaces, SOME (but again, not all) of the "<a name"
tags don't have "'s... this is a problem because we're having to
replace all special characters with _'s...
Some of our bookmarks are quite wordy (we found one yesterday with 11
spaces)
href is sometimes all caps (HREF)

As you can imagine, there are alot of corner cases and I felt it was
easier just to be inefficient and write out all the regex cases and
loop through them repeatedly... I've also got to work around the stuff
already in the system (for example, I need to make certain I'm looking
behind the #'s in the bookmark links, otherwise I'll end up replacing
legitimate -'s in external web site addresses)

I think Pablo is correct that a single (or perhaps two) RE statements
are all that is needed... perhaps:

p1= re.compile('(href=|HREF=)+(.*)(#)+(.*)(\w\'\?-<: )+(.*)(">)+')
and the corresponding name replace and then the one corner case we ran
into of
p100= re.compile('(a name=)+(.*)(-)+(.*)(></a>)+')



From jstroud at mbi.ucla.edu  Fri Sep 14 21:57:40 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 14 Sep 2007 18:57:40 -0700
Subject: regexp search on infinite string?
In-Reply-To: <1189802940.518794.129130@r29g2000hsg.googlegroups.com>
References: <1189802940.518794.129130@r29g2000hsg.googlegroups.com>
Message-ID: <fcfdq4$23d$1@daisy.noc.ucla.edu>

Paddy wrote:
> Lets say i have a generator running that generates successive
> characters of a 'string'
>>From what I know, if I want to do a regexp search for a pattern of
> characters then I would have to 'freeze' the generator  and pass the
> characters so far to re.search.
> It is expensive to create successive characters, but caching could be
> used for past characters. is it possible to wrap the generator in a
> class, possibly inheriting from string, that would allow the regexp
> searching of the string but without terminating the generator? In
> other words duck typing for the usual string object needed by
> re.search?
> 
> - Paddy.
> 

re.search & re.compile checks for str or unicode types explicitly, so 
you need to turn your data into one of those before using the module.

buffer = []
while True:
   buffer.append(mygerator.next())
   m = re.search(pattern, "".join(buffer))
   if m:
     process(m)
     buffer = []

James



From mail at timgolden.me.uk  Thu Sep 13 07:18:01 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 13 Sep 2007 12:18:01 +0100
Subject: Python+Expect+Win32 = Not Possible?
In-Reply-To: <1189681397.349994.126130@57g2000hsv.googlegroups.com>
References: <1189657637.539038.317280@k79g2000hse.googlegroups.com>	<1189672955.321701.164050@57g2000hsv.googlegroups.com>
	<1189681397.349994.126130@57g2000hsv.googlegroups.com>
Message-ID: <46E91C69.6030607@timgolden.me.uk>

gamename wrote:
> On Sep 13, 1:42 am, half.ital... at gmail.com wrote:
>> On Sep 12, 9:27 pm, gamename <namesagame-use... at yahoo.com> wrote:
>>
>>> Hi,
>>> Is it still the case there is no practical Expect-like module for
>>> win32? I know that cygwin can support pexpect, but that isn't an
>>> option here --- I have to use a native win32 Python version.
>>> Are there alternatives, or is it simply not an option to replicate
>>> Expect on win32 with python?
>>> All I'm trying to do is start a couple processes, wait for each to say
>>> "done" on stdout and then quit (or timeout if something went wrong).
>>> TIA,
>>> -T
>> I had planned on using telnet to do the same thing on windows.  I
>> don't think I ever proved it, but I'm pretty sure it will work.
> 
> Thanks, Sean.  The problem is that telnet is generally disabled on
> most hosts nowadays.

I'm not sure whether the need you describe above "start a
couple [of] processes, wait for each to say 'done' and
then quit (or timeout...)" is *all* of your requirements
or just an example. And are these processes running on
remote machines? Or just locally?

Depending on those things, maybe there are other ways
to do what you want under Windows?

(I've checked back through the archives and I can't find
any earlier posts describing the requirement more clearly).

TJG


From bj_666 at gmx.net  Fri Sep  7 02:25:19 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 7 Sep 2007 06:25:19 GMT
Subject: Using wild character
References: <1189054805.447871.213150@y42g2000hsy.googlegroups.com>
	<1189058095.671230.262190@o80g2000hse.googlegroups.com>
	<5k9pjoF2mrncU1@mid.uni-berlin.de>
	<1189122511.231602.217710@w3g2000hsg.googlegroups.com>
Message-ID: <5kc96fF31i6hU1@mid.uni-berlin.de>

On Thu, 06 Sep 2007 16:48:31 -0700, Zentrader wrote:

> On Sep 6, 12:47 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>> On Wed, 05 Sep 2007 22:54:55 -0700, TheFlyingDutchman wrote:
>> > To do a "*string" wildcard filter use the endswith() function instead
>> > of startswith() and to do a *string* type wildcard filter use
>> > the find() function > -1.
>>
>> Maybe better the ``in`` operator for the '*string*' type.  `str.find()`
>> will go away in the future.
> 
> string.find serves a useful purpose in that it returns the starting
> location of the string found, or -1 if not found, so if you wanted to
> slice "abdecf" on"c", string.find will tell you where that is.

But that position is not needed here and I think::

  result = [name for name in names if 'spam' in name]

reads more natural than::

  result = [name for name in names if name.find('spam') > -1]

Ciao,
	Marc 'BlackJack' Rintsch


From m.n.summerfield at googlemail.com  Thu Sep 13 02:27:12 2007
From: m.n.summerfield at googlemail.com (Mark Summerfield)
Date: Thu, 13 Sep 2007 06:27:12 -0000
Subject: An ordered dictionary for the Python library?
In-Reply-To: <7xzlzrtrjn.fsf@ruckus.brouhaha.com>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<7xzlzrtrjn.fsf@ruckus.brouhaha.com>
Message-ID: <1189664832.876539.86800@k79g2000hse.googlegroups.com>

On 13 Sep, 00:03, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> Mark Summerfield <m.n.summerfi... at googlemail.com> writes:
> > I feel that Python lacks one useful data structure: an ordered
> > dictionary.
> > Do other Python programmers feel this lack? Is this worth a PEP?
>
> Yes.  It should use a functional data structure.

Could you elaborate?

Here's my impression of the postings so far: there are 3 categories of
response:

(A) There is no need for such a thing.

(B) It is useful, but so easy to implement that it needn't be in the
library.

(C) It is worth having an ordered data structure of some kind.

Regarding (A) and (B): I remember Python before it had the sets
module. "There's no need for sets, you can do them with dicts".
Thankfully sets are in the language and I for one use them
extensively.

For (C) what I had in mind was:

An API that is identical to a dict, with the few additional methods/
behaviours listed below:
- If an item is inserted it is put in the right place (because the
underlying data structure, b*tree, skiplist or whatever is
intrinsically ordered by < on the key)
- Extra methods
    key_at(index : int) -> key
    item_at(index : int) -> (key, value)
    value_at(index : int) -> value
    set_value_at(index : int, value) # no return value necessary but
maybe key if convenient
    od[x:y:z] -> list of values ordered by key # can read a slice but
not assign a slice
  and maybe
    keys_for(fromindex : int, uptobutexcludingindex : int) -> ordered
list of keys

I've given examples of the use cases I envisage (and that I use in
both Python with my own ordered dict and in C++ with the map class) in
a previous posting, and I've shown the  API I envisage above. I know
that some people might prefer ordering by value or the option of case-
insensitive ordering, but both these can be achieved using the API
above, e.g.,
    od[value.lower()] = value # case-insensitive ordering of list of
values
And as for duplicates there are two approaches I use: (1) make each
string unique as I showed in my previous post, or (2) use a value that
itself is a list, dict or set.
(As for those who have suggested an ordered data structure that isn't
a dict, I don't see a conflict, I'd be happy to see more data
structures in the collections module.)

Is what I've suggested sufficient (and sufficiently general) for the
standard library? If it is not, what should be done, or is there some
other approach and API that would better provide the functionality
envisaged?




From ricardo.turpino at gmail.com  Mon Sep 10 16:51:09 2007
From: ricardo.turpino at gmail.com (ricardo.turpino at gmail.com)
Date: Mon, 10 Sep 2007 13:51:09 -0700
Subject: Mac OSX sqlite problem. Missing?
In-Reply-To: <5klocbF498ruU1@mid.uni-berlin.de>
References: <1189455305.994439.107100@r34g2000hsd.googlegroups.com>
	<5klocbF498ruU1@mid.uni-berlin.de>
Message-ID: <1189457469.285055.212670@r29g2000hsg.googlegroups.com>

Diez B. Roggisch wrote:

>
> Are you by any chance using the python 2.3 when issuing that import
> statement?
>
> Diez

Unfortunately not :(

ibook:~/project1$ python -V
Python 2.5
ibook:~/project1$ python
Python 2.5 (r25:51918, Sep 19 2006, 08:49:13)
[GCC 4.0.1 (Apple Computer, Inc. build 5341)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import sqlite
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named sqlite
>>>



From theller at ctypes.org  Fri Sep  7 11:30:53 2007
From: theller at ctypes.org (Thomas Heller)
Date: Fri, 07 Sep 2007 17:30:53 +0200
Subject: debugging program that uses ctypes
In-Reply-To: <1189178285.647177.216320@g4g2000hsf.googlegroups.com>
References: <1189178285.647177.216320@g4g2000hsf.googlegroups.com>
Message-ID: <fbrqrd$gtd$1@sea.gmane.org>

marco_347 at yahoo.it schrieb:
> hi all, I have a python program that calls a dll through ctypes
> (py2.5). In some (reproducible)
> conditions the program crashes with an error in ctypes module.

You mean a segfault?

> How can I trace down the problem? I have created a debug build of
> python but I also use pyodbc
> and dateutil libraries in my program and I don't know how to make them
> visible to python_d.exe
> Am I using the right approach?

I would say yes.  It seems you are using windows - running debug builds of
python on windows start a dialog box that allows to attach the MSVC debugger
to the running program. Usually this allows to locate the error fairly quickly.

As you have discovered, the problem is that you need to build all the extensions
that you use in debug mode otherwise you cannot use them.

If you cannot rebuild the extensions you have to reproduce the crash in
a script that doesn't use these extensions.

Thomas



From jstroud at mbi.ucla.edu  Sun Sep 16 21:09:12 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 16 Sep 2007 18:09:12 -0700
Subject: adding a static class to another class
In-Reply-To: <mailman.629.1189984482.2658.python-list@python.org>
References: <mailman.629.1189984482.2658.python-list@python.org>
Message-ID: <fckjna$uci$1@daisy.noc.ucla.edu>

Nathan Harmston wrote:
> And also preventing more than one Manager instance instantiated at one
> time.

Forgot to answer this. You want the singleton pattern:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52558

James


From pdula at cisco.com  Mon Sep 24 08:13:38 2007
From: pdula at cisco.com (Piotr Dula (pdula))
Date: Mon, 24 Sep 2007 14:13:38 +0200
Subject: enabling IPv6 in python
Message-ID: <FA7FC8ED94835C49B2EF0EB0FB0AAEF02EC804@xmb-ams-331.emea.cisco.com>

Hello,
 
How to make python support IPv6?
 
I have IPv6 running on my host (interfaces have ipv6 addresses assigned)
 
I tried to do:
 
./configure --enable-ipv6
make 
make install
 
and I didn't get any error. However, IPv6 didn't work.  
 
 then I tried 
 
./configure --enable-ipv6=yes
 
and I got a lot of parse errors (many pages of errors similar to the
ones below)
 
In file included from /root/Piotr/Python-2.5.1/Modules/_tkinter.c:67:
/usr/include/tk.h:581: parse error before "Bool"
/usr/include/tk.h:583: parse error before "event"
/usr/include/tk.h:584: parse error before "root"
/usr/include/tk.h:585: parse error before "subwindow"
/usr/include/tk.h:586: parse error before "time"
/usr/include/tk.h:586: `time' redeclared as different kind of symbol
/usr/include/time.h:184: previous declaration of `time'
/usr/include/tk.h:591: parse error before "same_screen"
/usr/include/tk.h:597: parse error before "Bool"
/usr/include/tk.h:599: parse error before "window"
/usr/include/tk.h:601: parse error before "XActivateEven
 
How to make it work? 
 
Thank you in advance,
 
Piotr
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From jeroen.hegeman at gmail.com  Fri Sep 21 12:34:40 2007
From: jeroen.hegeman at gmail.com (Jeroen Hegeman)
Date: Fri, 21 Sep 2007 18:34:40 +0200
Subject: Newbie completely confused
Message-ID: <4437CC27-104E-4EE9-80DB-DCF36213B44F@gmail.com>

Dear Pythoneers,

I'm moderately new to python and it got me completely lost already.

I've got a bunch of large (30MB) txt files containing one 'event' per  
line. I open files after each other, read them line by line and from  
each line build a 'data structure' of a main class (HugeClass)  
containing some simple information as well as several instances of  
some other classes.

No problem so far, but I noticed that the first file was always  
faster than the others, whereas I would expect it to be slower, if  
anything. Testing with two copies of the same file shows the same  
behaviour.

Below is a (rather large, I'll explain) chunk of code. I ran this in  
a directory with two test files called 'test_file0.txt' and  
'test_file1.txt', each containing 10k lines of the same information  
as the 'long_line' variable in the code. This shows the following  
timing (consistently) for the little piece of code that reads all  
lines from file:

...processing all 2 files found
--> 1/2: ./test_file0.txt
Now reading ...
DEBUG readLines A took 0.093 s
...took 8.85717201233 seconds
--> 2/2: ./test_file0.txt
Now reading ...
DEBUG readLines A took 3.917 s
...took 12.8725550175 seconds

So the first time around the file gets read in in ~0.1 seconds, the  
second time around it needs almost four seconds! As far as I can see  
this is related to 'something in memory being copied around' since if  
I replace the 'alternative 1' by the 'alternative 2', basically  
making sure that my classes are not used, reading time the second  
time around drops back to normal (= roughly what it is the first pass).

I already want to apologise for the size of the code chunk below. I  
know about 'minimal reproducible examples' and such but I found out  
that if I commented out the filling (and thus binding) of some of the  
member variables in the lower-level classes, the problem (sometimes)  
also disappears. That also points to some magic happening in memory?

I probably mucked something up but I'm really lost as to where. Any  
help would be appreciated.

The original problem showed up using Python 2.4.3 under linux (Fedora  
Core 1).
Python 2.3.5 on OS X 10.4.10 (PPC) appears not to show this issue(?).

Thanks,
Jeroen

P.S. Any ideas on optimising the input to the classes would be  
welcome too ;-)

Jeroen Hegeman
jeroen DOT hegeman AT gmail DOT com



===================Start of code chunk=========================
#!/usr/bin/env python

import time
import sys
import os
import gzip
import pdb

long_line =  
"1,31905,0,174501,46152419,2117961,143,-1.0000,51,2,-19.9139,42,-19.9140 
, 
6.6002,0,0,0,46713.1484,2,0.0000,-1,1.4203220606,0.3876158297,147.121017 
4561,147.1284120973,-2,0.0000,-1,1.5887237787,-2.4011900425,-319.7776794 
434,319.7906836817,4,21,0.0000,-1,-0.5672637224,2.2052443027,-43.2842369 
080,43.3440905719,21,0.0000,-1,-0.8540721536,0.0770076364,-22.7033920288 
, 
22.7195827425,21,0.0000,-1,0.1623233557,0.5845987201,-28.0794525146,28.0 
860084170,21,0.0000,-1,0.1943928897,-0.2195242196,-22.0666370392,22.0685 
899391,6,0.0000,-1,-40.1810989380,-127.0743789673,-104.9231948853,239.74 
36794163,-6,0.0000,-1,43.2013626099,125.0640945435,-67.7339172363,227.17 
53587387,24,0.0000,-1,-57.9123306274,-17.3483123779,-71.8334121704,123.4 
397648033,-24,0.0000,-1,84.0985488892,54.4542312622,-62.4525032043,144.5 
299239704,5,0.0000,-1,17.7312316895,-109.7260665894,-33.0897827148,116.3 
039146130,-5,0.0000,-1,-40.8971862793,70.6098632812,-5.2814140320,82.645 
4347683,4,0.0000,-1,-6.2859884724,-17.9586020410,-58.9464384913,69.40294 
68585,-3,0.0000,-1,-51.6263811588,0.6104701459,-12.8869901896,54.0368221 
571,3,0.0000,-1,16.4690684490,48.0271777511,-51.7867884636,74.5327484701 
,-4,0.0000,-1,67.6295298338,6.4269350171,-10.6658525467,69.9971834876,7, 
7,1.0345464706e+01,-7.0800781250e+01,-2.0385742187e+01,7.5256346272e 
+01,1.3148,0.0072,0.0072,1.3148,0.0072,0.0072,1.0255,1.0413,0.0,0.0,0.0, 
0.0,-1.0,-4.2383,49.5276,13,0.1537,0.5156,0,0.9982,0.0034,1.0000,7,1,0.9 
566,0.0062,1,0,2,1.2736,1,7.8407,1,0,2,1.2736,1,7.8407,0,0,-1.0,-1.0,5,1 
,-2.4047853470e+01,4.0832519531e+01,-3.8452150822e+00,4.7851562559e 
+01,1.3383,0.0051,0.0051,1.3383,0.0051,0.0051,0.9340,0.9541,0.0,0.0,0.0, 
0.0,-1.0,-2.4609,21.3916,7,0.1166,0.5977,0,0.9999,0.0052,1.0000,9,1,0.99 
47,0.0063,1,0,2,0.7735,1,74.7937,1,0,2,0.7735,1,74.7937,0,0,-1.0,-1.0,5, 
1,-4.4067382812e+01,2.5634796619e+00,-1.1138916016e+01,4.6203614579e 
+01,1.3533,0.0054,0.0054,1.3533,0.0054,0.0054,1.0486,1.0903,0.0,0.0,0.0, 
0.0,-1.0,-3.9648,31.3733,13,0.1767,0.5508,100,0.9977,0.0040,1.0000,9,1,0 
. 
0000,0.4349,0,0,0,0.0000,0,-1000.0000,0,0,0,0.0000,0,-1000.0000,0,0,-1.0 
,-1.0,0,1,3.7200927734e+01,2.7465817928e+00,-5.5847163200e 
+00,3.7994386563e 
+01,1.3634,0.0062,0.0062,1.6488,0.0385,0.0385,0.7141,0.9013,5.3986899118 
e+00,6.6766492833e-01,-2.3780213181e-01,5.4460399892e 
+00,0.5504,-3.1445,0.7776,9,0.1169,0.7734,0,0.9977,0.0040,1.0000,7,1,0.0 
000,0.1099,0,0,0,0.0000,0,-1000.0000,0,0,0,0.0000,0,-1000.0000,1,-1,5.38 
93,0.5459,4,1,1.2969970703e+01,3.3203125000e+01,-3.7231445312e 
+01,5.2001951876e 
+01,1.4414,0.0129,0.0129,1.4414,0.0129,0.0129,0.9019,0.7331,0.0,0.0,0.0, 
0.0,-1.0,-10.0195,12.2034,17,0.1922,0.3633,0,0.9774,0.0248,1.0000,6,1,0. 
0000,0.3523,0,0,0,0.0000,0,-1000.0000,0,0,0,0.0000,0,-1000.0000,0,0,-1.0 
,-1.0,0,1,-1.6174327135e+00,-7.1411132812e+00,-1.8798828125e 
+01,2.0202637222e 
+01,1.7886,0.0352,0.0352,1.7886,0.0352,0.0352,1.8257,1.2368,0.0,0.0,0.0, 
0.0,-1.0,-17.3438,45.6714,10,0.1529,0.5625,0,0.9898,0.0094,1.0000,3,1,-1 
. 
0000,10000.0000,0,0,0,-1.0000,0,-1.0000,0,0,0,-1.0000,0,-1.0000,0,0,-1.0 
,-1.0,-6,0,-5.9204106331e+00,-3.4484868050e+00,-6.5307617187e 
+00,9.6740722971e 
+00,1.6782,0.0326,0.0326,1.6782,0.0326,0.0326,1.0000,1.0000,0.0,0.0,0.0, 
0.0,-1.0,-9.4727,37.3401,13,0.2711,0.2344,100,0.9861,0.0045,1.0000,3,1,- 
1.0000,10000.0000,0,0,0,-1.0000,0,-1.0000,0,0,0,-1.0000,0,-1.0000,0,0,-1 
.0,-1.0,-6,0"

######################################################################## 
###

class SmallClass:
     def __init__(self):
         return
     def input(self, line, c):
         self.item0 = int(line[c]); c += 1
         self.item1 = float(line[c]); c += 1
         self.item2 = int(line[c]); c += 1
         self.item3 = float(line[c]); c += 1
         self.item4 = float(line[c]); c += 1
         self.item5 = float(line[c]); c += 1
         self.item6 = float(line[c]); c += 1
         return c

######################################################################## 
###

class ModerateClass:
     def __init__(self):
         return
     def __del__(self):
         pass
         return
     def input(self, line, c):

         self.items = {}

         self.item0 = float(line[c]);
         c += 1

         unit1 = SmallClass()
         c = unit1.input(line, c)
         self.items[len(self.items)] = unit1
         unit2 = SmallClass()
         c = unit2.input(line, c)
         self.items[len(self.items)] = unit2

         units_chunk = []
         chunk_size = int(line[c])
         c += 1
         for i in xrange(chunk_size):
             unit = SmallClass()
             c = unit.input(line, c)
             units_chunk.append(unit)
         for i in xrange(10):
             unit = SmallClass()
             c = unit.input(line, c)
         return c

######################################################################## 
###

class LongClass:

     def __init__(self):
         return
     def clear(self):
         return
     def input(self, foo, c):
         self.item0 = float(foo[c]); c += 1
         self.item1 = float(foo[c]); c += 1
         self.item2 = float(foo[c]); c += 1
         self.item3 = float(foo[c]); c += 1
         self.item4 = float(foo[c]); c+=1
         self.item5 = float(foo[c]); c+=1
         self.item6 = float(foo[c]); c+=1
         self.item7 = float(foo[c]); c+=1
         self.item8 = float(foo[c]); c+=1
         self.item9 = float(foo[c]); c+=1
         self.item10 = float(foo[c]); c+=1
         self.item11 = float(foo[c]); c+=1
         self.item12 = float(foo[c]); c += 1
         self.item13 = float(foo[c]); c += 1
         self.item14 = float(foo[c]); c += 1
         self.item15 = float(foo[c]); c += 1
         self.item16 = float(foo[c]); c+=1
         self.item17 = float(foo[c]); c+=1
         self.item18 = float(foo[c]); c+=1
         self.item19 = int(foo[c]); c+=1
         self.item20 = float(foo[c]); c+=1
         self.item21 = float(foo[c]); c+=1
         self.item22 = int(foo[c]); c+=1
         self.item23 = float(foo[c]); c += 1
         self.item24 = float(foo[c]); c += 1
         self.item25 = float(foo[c]); c+=1
         self.item26 = int(foo[c]); c+=1
         self.item27 = bool(int(foo[c])); c+=1
         self.item28 = float(foo[c]); c+=1
         self.item29 = float(foo[c]); c+=1
         self.item30 = (foo[c] == "1"); c += 1
         self.item31 = (foo[c] == "1"); c += 1
         self.item32 = float(foo[c]); c += 1
         self.item33 = float(foo[c]); c += 1
         self.item34 = int(foo[c]); c += 1
         self.item35 = float(foo[c]); c += 1
         self.item36 = (foo[c] == "1"); c+=1
         self.item37 = (foo[c] == "1"); c+=1
         self.item38 = float(foo[c]); c += 1
         self.item39 = float(foo[c]); c += 1
         self.item40 = int(foo[c]); c += 1
         self.item41 = float(foo[c]); c += 1
         self.item42 = (foo[c] == "1"); c+=1
         self.item43 = float(foo[c]); c+=1
         self.item44 = float(foo[c]); c+=1
         self.item45 = float(foo[c]); c += 1
         self.item46 = int(foo[c]); c+=1
         self.item47 = bool(int(foo[c])); c+=1
         return c

######################################################################## 
###

class HugeClass:
     def __init__(self,line):
         self.clear()
         self.input(line)
         return
     def __del__(self):
         del self.B4v
         return
     def clear(self):
         self.long_classes = {}
         self.B4v={}
         return
     def input(self, line):

         try:
             foo = line.strip().split(',')
             c = 0

             self.asciiVersion = float(foo[c])
             c += 1

             self.item0 = foo[c]; c += 1
             self.item1 = (self.item0 != "0")

             self.item2 = (foo[c] == "1"); c += 1

             self.item3=int(foo[c]); c+=1
             self.item4=int(foo[c]); c+=1
             self.item5=int(foo[c]); c+=1
             self.item6=int(foo[c]); c += 1
             self.item7=float(foo[c]); c+=1

             self.item8 = foo[c]; c += 1
             bit_item = int(self.item8)
             self.item9 = bool(bit_item & 2048)
             self.item10 = bool(bit_item & 1024)
             self.item11 = bool(bit_item & 512)
             self.item12 = bool(bit_item & 256)
             self.item13 = bool(bit_item & 128)
             self.item14 = bool(bit_item & 64)
             self.item15 = bool(bit_item & 32)
             self.item16 = bool(bit_item & 16)
             self.item17 = bool(bit_item & 8)
             self.item18 = bool(bit_item & 4)
             self.item19 = bool(bit_item & 2)
             self.item20 = bool(bit_item & 1)

             self.item21 = int(foo[c]); c+=1
             self.item22 = float(foo[c]); c+=1
             self.item23 = int(foo[c]); c+=1
             self.item24 = float(foo[c]); c+=1

             self.item25 = float(foo[c]); c+=1

             self.item26 = foo[c]; c+=1
             self.item27 = int(foo[c]); c+=1
             self.item28 = int(foo[c]); c+=1

             self.item29 = ModerateClass()
             c = self.item29.input(foo, c)

             self.item30 = int(foo[c]); c+=1
             self.item31 = int(foo[c]); c+=1

             for i in xrange(self.item31):
                 unit = LongClass()
                 c = unit.input(foo, c)
                 self.long_classes[len(self.long_classes)] = unit

             assert(c == len(foo)), "ERROR We did not read the whole  
line!!!"

         except (ValueError,IndexError), msg:
             print >> sys.stderr, \
                   "ERROR Trouble reading line: `%(msg)s'" % vars()
             self.clear()
             return
         return

######################################################################## 
###

def readLines(f):
     DATA = []
     f.seek(0)

     time_a = time.time()
     for i in f:
         DATA.append(i)
     time_b = time.time()

     time_spent_reading = time_b - time_a
     print "DEBUG readLines took %.3f s" % time_spent_reading

     return DATA

######################################################################## 
###

def ReadClasses(filename):

     print 'Now reading ...'

     built_classes = {}

     # Read lines from file
     in_file = open(filename, 'r')
     LINES = readLines(in_file)
     in_file.close()

     # and interpret them.
     for i in LINES:
## This is alternative 1.
         built_classes[len(built_classes)] = HugeClass(long_line)
## The next line is alternative 2.
##        built_classes[len(built_classes)] = long_line

     del LINES

     return

######################################################################## 
###

def ProcessList():

     input_files = ["./test_file0.txt",
                    "./test_file0.txt"]

     # Loop over all files that we found.
     nfiles = len(input_files)
     file_index = 0
     for i in input_files:
         print "--> %i/%i: %s" % (file_index+1, nfiles, i)
         ReadClasses(i)
         file_index += 1

     return

######################################################################## 
###

if __name__ == "__main__":
     ProcessList()

     sys.exit(0)

######################################################################## 
###





From mrkafk at gmail.com  Sun Sep 30 09:53:14 2007
From: mrkafk at gmail.com (mrkafk at gmail.com)
Date: Sun, 30 Sep 2007 06:53:14 -0700
Subject: s.split() on multiple separators
Message-ID: <1191160394.870241.171200@w3g2000hsg.googlegroups.com>

Hello everyone,

OK, so I want to split a string c into words using several different
separators from a list (dels).

I can do this the following C-like way:

>>> c=' abcde abc cba fdsa bcd '.split()
>>> dels='ce '
>>> for j in dels:
	cp=[]
	for i in xrange(0,len(c)-1):
		cp.extend(c[i].split(j))
	c=cp


>>> c
['ab', 'd', '', 'ab', '', '']

But. Surely there is a more Pythonic way to do this?

I cannot do this:

>>> for i in dels:
	c=[x.split(i) for x in c]

because x.split(i) is a list.



From george.sakkis at gmail.com  Sun Sep 23 01:34:01 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: Sun, 23 Sep 2007 05:34:01 -0000
Subject: Factory function with keyword arguments
In-Reply-To: <13fbl9ertj5es12@corp.supernews.com>
References: <13fbl9ertj5es12@corp.supernews.com>
Message-ID: <1190525641.226153.100060@22g2000hsm.googlegroups.com>

On Sep 22, 10:53 pm, Steven D'Aprano <st... at REMOVE-THIS-
cybersource.com.au> wrote:
> I'm writing a factory function that needs to use keywords in the produced
> function, not the factory. Here's a toy example:
>
> def factory(flag):
>     def foo(obj, arg):
>         if flag:
>             # use the spam keyword to method()
>             return obj.method(spam=arg)
>         else:
>             # use the ham keyword
>             return obj.method(ham=arg)
>     return foo
>
> Problem: the test of which keyword to use is done every time the produced
> function is called, instead of once, in the factory.
>
> I thought of doing this:
>
> def factory(flag):
>     if flag: kw = 'spam'
>     else: kw = 'ham'
>     def foo(obj, arg):
>         kwargs = dict([(kw, arg)])
>         return obj.method(**kwargs)
>     return foo
>
> Is this the best way of doing this? Are there any alternative methods
> that aren't risky, slow or obfuscated?

Unless I'm missing something, the obvious way is to move the flag
check outside the function and have two definitions of foo:

def factory(flag):
    if flag: # use the spam keyword to method()
        def foo(obj, arg):
            return obj.method(spam=arg)
    else: # use the ham keyword
        def foo(obj, arg):
            return obj.method(ham=arg)
    return foo

Now if foo is more than a line or two and the only difference the flag
makes is the keyword argument, you can either factor the common part
out in another function called by foo or (if performance is crucial)
create foo dynamically through exec:

def factory(flag):
    kw = flag and 'spam' or 'ham'
    exec '''def foo(obj, arg):
                return obj.method(%s=arg)''' % kw
    return foo


George



From ricaraoz at gmail.com  Sat Sep  1 23:05:21 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Sun, 02 Sep 2007 00:05:21 -0300
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1i3rxit.1750ghi14bbcm3N%aleax@mac.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>	<1188364909.397692.209170@q4g2000prc.googlegroups.com>	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>	<1188369928.755777.142690@i38g2000prf.googlegroups.com>	<46d75191$0$401$426a74cc@news.free.fr>	<1188518054.298017.90610@x35g2000prf.googlegroups.com>	<46d76595$0$4013$426a74cc@news.free.fr>	<7xlkbsmqe4.fsf@ruckus.brouhaha.com>	<1188525647.003223.199620@q5g2000prf.googlegroups.com>	<mailman.181.1188527203.28954.python-list@python.org>	<1188537516.622167.115080@z24g2000prh.googlegroups.com>	<mailman.192.1188556734.28954.python-list@python.org>
	<1i3rxit.1750ghi14bbcm3N%aleax@mac.com>
Message-ID: <46DA2871.5030406@bigfoot.com>

Alex Martelli wrote:
> Ricardo Ar?oz <ricaraoz at gmail.com> wrote:
>    ...
>> We should remember that the level
>> of security of a 'System' is the same as the level of security of it's
>> weakest component,
> 
> Not true (not even for security, much less for reliability which is
> what's being discussed here).
> 
> It's easy to see how this assertion of yours is totally wrong in many
> ways...
> 
> Example 1: a toy system made up of subsystem A (which has a probability
> of 90% of working right) whose output feeds into subsystem B (which has
> a probability of 80% of working right).  A's failures and B's faliures
> are statistically independent (no common-mode failures, &c).
> 
> The ``level of goodness'' (probability of working right) of the weakest
> component, B, is 80%; but the whole system has a ``level of goodness''
> (probability of working right) of just 72%, since BOTH subsystems must
> work right for the whole system to do so.  72 != 80 and thus your
> assertion is false.
> 
> More generally: subsystems "in series" with independent failures can
> produce a system that's weaker than its weakest component.
> 
> 
> Example 2: another toy system made up of subsystems A1, A2 and A3, each
> trying to transform the same input supplied to all of them into a 1 bit
> result; each of these systems works right 80% of the time, statistically
> independently (no common-mode failures, &c).  The three subsystems'
> results are reconciled by a simple majority-voting component M which
> emits as the system's result the bit value that's given by two out of
> three of the Ai subsystems (or, of course, the value given unanimously
> by all) and has extremely high reliability thanks to its utter
> simplicity (say 99.9%, high enough that we can ignore M's contribution
> to system failures in a first-order analysis).
> 
> The whole system will fail when all Ai fail together (probability
> 0.2**3) or when 2 out of them fail while the hird one is working
> (probability 3*0.8*0.2**2):
> 
>>>> 0.2**3+3*0.2**2*0.8
> 0.10400000000000004
> 
> So, the system as a whole has a "level of goodness" (probability of
> working right) of almost 90% -- again different from the "weakest
> component" (each of the three Ai's), in this case higher.
> 
> More generally: subsystems "in parallel" (arranged so as to be able to
> survive the failure of some subset) with indipendent failures can
> produce a system that's stronger than its weakest component.
> 
> 
> Even in the field of security, which (changing the subject...) you
> specifically refer to, similar considerations apply.  If your assertion
> was correct, then removing one component would never WEAKEN a system's
> security -- it might increase it if it was the weakest, otherwise it
> would leave it intact.  And yet, a strong and sound tradition in
> security is to require MULTIPLE components to be all satisfied e.g. for
> access to secret information: e.g. the one wanting access must prove
> their identity (say by retinal scan), possess a physical token (say a
> key) AND know a certain secret (say a password).  Do you really think
> that, e.g., removing the need for the retinal scan would make the
> system's security *STRONGER*...?  It would clearly weaken it, as a
> would-be breaker would now need only to purloin the key and trick the
> secret password out of the individual knowing it, without the further
> problem of falsifying a retinal scan successfully.  Again, such security
> systems exist and are traditional exactly because they're STRONGER than
> their weakest component!
> 
> 
> So, the implication accompanying your assertion, that strenghtening a
> component that's not the weakest one is useless, is also false.  It may
> indeed have extremely low returns on investment, depending on system's
> structure and exact circumstances, but then again, it may not; nothing
> can be inferred about this ROI issue from the consideration in question.
> 
> 
> Alex

You win the argument, and thanks you prove my point. You typically
concerned yourself with the technical part of the matter, yet you
completely ignored the point I was trying to make.
That is that in real world applications formally proving the application
is not only an enormous resource waster but it also pays very little if
at all. I think most cases will fall under point (1) of your post, and
as so many other not formally proven subsystems are at work at the same
time there will be hardly any gain in doing it.
Point (2) of your post would be my preferred solution, and what is
usually done in hardware.
In the third part of your post, regarding security, I think you went off
the road. The weakest component would not be one of the requisites of
access, the weakest component I was referring to would be an actual
APPLICATION, e.g. an ftp server. In that case, if you have several
applications running your security will be the security of the weakest
of them.








From mail at timgolden.me.uk  Fri Sep  7 10:15:46 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Fri, 07 Sep 2007 15:15:46 +0100
Subject: Using s.sort([cmp[, key[,	reverse]]]) to sort a list of objects
	based on a attribute
In-Reply-To: <1189173455.525144.326300@y42g2000hsy.googlegroups.com>
References: <1189173455.525144.326300@y42g2000hsy.googlegroups.com>
Message-ID: <46E15D12.2010309@timgolden.me.uk>

cjt22 at bath.ac.uk wrote:
> Hi there
> 
> I am fairly new to Python and have not really used regular expressions
> before (I think this might be needed for my query) and wondered if you
> could help
> 
> I have a step class and store in a list step instances
> A step instance contains variables: name, startTime etc and startTime
> is stored as a string %H:%M:%S
> 
> What I would like to do is to be able to sort this list of objects
> based on the startTime object so that the first item in the list is
> the object with the earliest Start time and last item is the object
> with the last Start time.
> 
> I belive my key has to be = strpTime(step.sTime, "%H:%M:%S")
> But don't know how to create the comparison funciton.

You're going to get a *lot* of answers on this one!

To start the ball rolling...

<code>
import random

class Step:

   def __init__ (self, name, startTime):
     self.name = name
     self.startTime = startTime

   def __cmp__ (self, other):
     return cmp (self.startTime, other.startTime)

   def __str__ (self):
     return str (self.startTime)
   __repr__ = __str__

steps = [Step (h, "%02d:00:00" % h) for h in range (10)]
random.shuffle (steps)
print "Shuffled:", steps

steps.sort ()
print "Sorted:", steps
</code>

In this case, I've given the class a ordering-semantic based
on its startTime attribute. Obviously, this only makes sense
if you *always* want your class to sort this way, rather than
in this one instance.

To do it on a per-sort basis, you *could* create simple per-sort
equivalent:

<code fragment>

def compare_by_startTime (one, other):
   return cmp (one.startTime, other.startTime)

steps.sort (cmp=compare_by_startTime)

</code>

or, in the case you're asking about, you could use the
operator module's attrgetter function to do what you want:

<code fragment>
import operator

steps.sort (key=operator.attrgetter ("startTime"))

</code>

TJG


From zentraders at gmail.com  Tue Sep  4 11:38:08 2007
From: zentraders at gmail.com (Zentrader)
Date: Tue, 04 Sep 2007 08:38:08 -0700
Subject: Tkinter(2)
In-Reply-To: <1188913329.457394.94220@g4g2000hsf.googlegroups.com>
References: <1188913329.457394.94220@g4g2000hsf.googlegroups.com>
Message-ID: <1188920288.143141.321940@y42g2000hsy.googlegroups.com>

On Sep 4, 6:42 am, vijayca <vijay... at gmail.com> wrote:
> my python installation is:Active python 2.5.1
> i am using Red Hat Linux
> i have the Tkinter module installed but any simple script produces an
> error....
>
> script:
> from Tkinter import Label
> widget = Label(None, text='Hello GUI world!')
> widget.pack()
> widget.mainloop()
>
> error:
> Traceback (most recent call last):
>   File "guy.py", line 2, in <module>
>     widget = Label(None, text='Hello GUI world!')
>   File "/root/Desktop/pythonall/ActivePython-2.5.1.1-linux-x86/
> INSTALLDIR/lib/python2.5/lib-tk/Tkinter.py", line 2464, in __init__
>     Widget.__init__(self, master, 'label', cnf, kw)
>   File "/root/Desktop/pythonall/ActivePython-2.5.1.1-linux-x86/
> INSTALLDIR/lib/python2.5/lib-tk/Tkinter.py", line 1923, in __init__
>     BaseWidget._setup(self, master, cnf)
>   File "/root/Desktop/pythonall/ActivePython-2.5.1.1-linux-x86/
> INSTALLDIR/lib/python2.5/lib-tk/Tkinter.py", line 1898, in _setup
>     _default_root = Tk()
>   File "/root/Desktop/pythonall/ActivePython-2.5.1.1-linux-x86/
> INSTALLDIR/lib/python2.5/lib-tk/Tkinter.py", line 1636, in __init__
>     self.tk = _tkinter.create(screenName, baseName, className,
> interactive, wantobjects, useTk, sync, use)
> _tkinter.TclError: no display name and no $DISPLAY environment
> variable
>
> please help me....
> i hate those error messages...
> vijay

See this example
http://www.pythonware.com/library/tkinter/introduction/hello-tkinter.htm#AEN50
http://www.python-eggs.org/?row=2



From gary.thrapp at navy.mil  Wed Sep 12 17:40:30 2007
From: gary.thrapp at navy.mil (grt)
Date: Wed, 12 Sep 2007 14:40:30 -0700
Subject: Search path for python script
Message-ID: <1189633230.265179.58780@19g2000hsx.googlegroups.com>

I'm new to python, running it under cygwin. This must be easy but I
haven't figured it out. I'm trying to run a script by typing:

python test.py

where test.py is in a directory I've added to PYTHONPATH, but test.py
is not found. Perhaps PYTHONPATH only applies to modules imported
within a script. I didn't notice an option to python to search the
standard path, like Perl -S.

How is this done?



From python at cx.hu  Wed Sep  5 21:08:30 2007
From: python at cx.hu (Ferenczi Viktor)
Date: Thu, 6 Sep 2007 03:08:30 +0200
Subject: Any syntactic cleanup likely for Py3? And what about doc
	standards?
In-Reply-To: <87ejhc8z23.fsf@wilson.homeunix.com>
References: <46DEFD2E.5050205@sbcglobal.net>
	<mailman.118.1189034379.2658.python-list@python.org>
	<87ejhc8z23.fsf@wilson.homeunix.com>
Message-ID: <200709060308.30192.python@cx.hu>

> > Properties are very useful, since ordinary attribute access can be
> > transparently replaced with properties if the developer needs to
> > add code when it's set or needs to calculate it's value whenever
> > it is read.
>
> I totally agree.  I like to use properties.  However, Python already
> has properties.  Their syntax is quite nice in my opinion, and
> rather explicit, too.  Their only flaw is that they are not
> "virtual" (in C++ speak).  In other words, you can't pass a "self"
> parameter to them.

Thanks for your comment. I'm going to elaborate on this issue. - Viktor


From ptmcg at austin.rr.com  Sun Sep 16 11:38:19 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Sun, 16 Sep 2007 08:38:19 -0700
Subject: Cannot formulate regex
In-Reply-To: <mailman.610.1189955906.2658.python-list@python.org>
References: <mailman.610.1189955906.2658.python-list@python.org>
Message-ID: <1189957099.952690.275320@n39g2000hsh.googlegroups.com>

On Sep 16, 10:18 am, "Dotan Cohen" <dotanco... at gmail.com> wrote:
> I'd like to filter spam from a certain company. Here are examples of
> strings found in their spam:
> Mega Dik
> Mega D1k
> MegaDik
> Mega. Dik
> M eg ad ik
> M E _G_A_D_ IK
> M_E_G. ADI. K
>
> I figured that this regex would match all but the second example, yet
> it matches none:
> |[^a-z]m[^a-z]e[^a-z]g[^a-z]a[^a-z]d[^a-z]i[^a-z]k[^a-z]|i
>
> What would be the regex that matches "megadik" regardless of whatever
> characters are sprinkled throughout?
>
> Thanks in advance.
>
> Dotan

Or you could try using "MegaRegex"!  I do and my girlfriend can't stop
talking about it! :)

-- Paul



From joel.schaerer at gmail.com  Thu Sep 27 11:39:13 2007
From: joel.schaerer at gmail.com (Joel)
Date: Thu, 27 Sep 2007 08:39:13 -0700
Subject: Cross-platform time out decorator
In-Reply-To: <87k5qc18gf.fsf@mulj.homelinux.net>
References: <1190802115.585306.250400@o80g2000hse.googlegroups.com>
	<1190899882.702911.44670@w3g2000hsg.googlegroups.com>
	<87k5qc18gf.fsf@mulj.homelinux.net>
Message-ID: <1190907553.425261.273400@w3g2000hsg.googlegroups.com>

On Sep 27, 4:36 pm, Hrvoje Niksic <hnik... at xemacs.org> wrote:
> Joel <joel.schae... at gmail.com> writes:
> > I found the solution :
> >http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/440569
> > describes a solution based on threads. I tested it and it works
> > perfectly.
>
> Note that, unlike the original alarm code, it doesn't really interrupt
> the timed-out method, it just returns the control back to the caller,
> using an exception to mark that a timeout occurred.  The "timed out"
> code is still merrily running in the background.  I don't know if it's
> a problem in your case, but it's an important drawback.

There should be a method to stop the thread though? I've never
programmed thread stuff in python and wasn't able to find how to do
it, would you happen to know how to "kill" the timed out thread?



From lorestar at gmail.com  Tue Sep 18 17:06:43 2007
From: lorestar at gmail.com (Lorenzo Stella)
Date: Tue, 18 Sep 2007 14:06:43 -0700
Subject: can Python be useful as functional?
In-Reply-To: <13f00gv3gl3n43d@corp.supernews.com>
References: <1190073045.618869.261290@k79g2000hse.googlegroups.com>
	<mailman.727.1190133380.2658.python-list@python.org>
	<13f00gv3gl3n43d@corp.supernews.com>
Message-ID: <1190149603.682088.44510@y42g2000hsy.googlegroups.com>

On 18 Set, 18:51, Grant Edwards <gra... at visi.com> wrote:
> Perhaps Lorenzo Stella is referring to Python's lack of
> tail-recursion optimization?  There are languages that
> guarantee unlimited tail-recursion with a limited stack.

That's it.

Rustom Mody: your implementation lacks exactly where mine does. Try
listing the first 2000 primes... That's what I meant: I cannot in
general (with Python) get such list just by defining *what* it is, I
have to express *how* to get it (describing an algorithm).

"What" or "How": that is the question.

Steve Holden wrote:
> You just don't like the specific limit that Python imposes. So increase
> it with sys.setrecursionlimit().

That is obviously not the answer to my question.



From exarkun at divmod.com  Fri Sep 21 14:23:54 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Fri, 21 Sep 2007 14:23:54 -0400
Subject: Parameterize formatting string
In-Reply-To: <18c1e6480709211116v1c830409q306605e414102272@mail.gmail.com>
Message-ID: <20070921182354.8162.1602536699.divmod.quotient.12381@ohm>

On Fri, 21 Sep 2007 20:16:29 +0200, David <wizzardx at gmail.com> wrote:
>On 9/21/07, cyril giraudon <cyril.giraudon at gmail.com> wrote:
>> Hello,
>>
>> I 'd like to know if a std::setw() equivalent function exists in
>> python ?
>>
>> i thought of something like :
>>
>> a = 16
>> "%ai" % 12
>>
>> But it is not correct.
>>
>> Any Idea ?
>
>("%i" % 12).rjust(a)
>
>Or, more ugly:
>
>"%%%di" % a % 12
>
>The first % (after quotes) builds this string: "%16i".
>Then the second % operation converts that string to '              12'
>

Or '%*i' % (a, 12)

Jean-Paul


From paul.nospam at rudin.co.uk  Tue Sep 25 05:41:58 2007
From: paul.nospam at rudin.co.uk (Paul Rudin)
Date: Tue, 25 Sep 2007 10:41:58 +0100
Subject: obtaining multiple values from a function.
References: <1190708155.683502.93040@r29g2000hsg.googlegroups.com>
	<87sl53m90t.fsf@benfinney.id.au>
Message-ID: <87zlzbrsih.fsf@rudin.co.uk>

Ben Finney <bignose+hates-spam at benfinney.id.au> writes:


>
> If, instead, it makes sense for the results to be iterated over, you
> can write a function that yields results one at a time, without
> necessarily knowing in advance what the entire set will be::
>
>     >>> def fib(max_result):

Going off on a tangent a bit, but I was idly considering the absence
of itertools.ireduce the other day. A problem is that reduce gives a
single result, so it's not clear what ireduce would do (perhaps why
it's not there). One obvious candidate would be to give the whole
sequence of partial reductions. I'm not sure if this would be
generally useful, but it would give a succinct way to do the Fibonacci
sequence:

itertools.ireduce(operator.add, itertools.count())



From shankarjee at gmail.com  Wed Sep 19 12:49:50 2007
From: shankarjee at gmail.com (Shankarjee Krishnamoorthi)
Date: Wed, 19 Sep 2007 11:49:50 -0500
Subject: Embedding a executable inside Python Script
Message-ID: <ead600e10709190949q632627dat3c5993601b3ed2b8@mail.gmail.com>

Hi
    I have a python routine which calls an executable file created by
someone else (I dont have the source code. All I have is an exe file).
I do

# My Python Code
output = os.system('other_executable.exe')
# Rest of my program.

I need to give this routine to others to use it. I have a exe made
with py2exe for my Python routine. The issue I am running into is
this. All the exes (mycode.exe and other_executable.exe) are placed in
a Network drive(Say I:) so that people can access it.

When the user calls this from a Local Drice(Say C:) The output is like this
C:> I:\mycode.exe input_file
other_executable_file.exe is not found.....

Is there any way where I can circumvent this. Thanks

Shankarjee


From jeroen.hegeman at gmail.com  Mon Sep 24 11:50:57 2007
From: jeroen.hegeman at gmail.com (Jeroen Hegeman)
Date: Mon, 24 Sep 2007 17:50:57 +0200
Subject: Newbie completely confused
In-Reply-To: <IE4Ji.117838$pR1.5801002@phobos.telenet-ops.be>
References: <mailman.876.1190392492.2658.python-list@python.org>
	<IE4Ji.117838$pR1.5801002@phobos.telenet-ops.be>
Message-ID: <E647C0B6-7000-4BB2-ADEC-6C8B7BCB1CC2@gmail.com>

Thanks for the comments,

>
> (First, I had to add timing code to ReadClasses: the code you posted
> doesn't include them, and only shows timings for ReadLines.)
>
> Your program uses quite a bit of memory. I guess it gets harder and
> harder to allocate the required amounts of memory.

Well, I guess there could be something in that, but why is there a  
significant increase after the first time? And after that, single- 
trip time pretty much flattens out. No more obvious increases.

>
> If I change this line in ReadClasses:
>
>          built_classes[len(built_classes)] = HugeClass(long_line)
>
> to
>
> 	dummy = HugeClass(long_line)
>
> then both times the files are read and your data structures are built,
> but after each run the data structure is freed. The result is that  
> both
> runs are equally fast.

Isnt't the 'del LINES' supposed to achieve the same thing? And  
really, reading 30MB files should not be such a problem, right? (I'm  
also running with 1GB of RAM.)

> I'm not sure how to speed things up here... you're doing much  
> processing
> on a lot of small chunks of data. I have a number of observations and
> possible improvements though, and some might even speed things up a  
> bit.

Cool thanks, let's go over them.

>
> You read the files, but don't use the contents; instead you use
> long_line over and over. I suppose you do that because this is a test,
> not your actual code?

Yeah ;-) (Do I notice a lack of trust in the responses I get? Should  
I not mention 'newbie'?)

Let's get a couple of things out of the way:
- I do know about meaningful variable names and case-conventions,  
but ... First of all I also have to live with inherited code (I don't  
like people shouting in their code either), and secondly (all the  
itemx) most of these members normally _have_ descriptive names but  
I'm not supposed to copy-paste the original code to any newsgroups.
- I also know that a plain 'return' in python does not do anything  
but I happen to like them. Same holds for the sys.exit() call.
- The __init__ methods normally actually do something: they  
initialise some member variables to meaningful values (by calling the  
clear() method, actually).
- The __clear__ method normally brings objects back into a well- 
defined 'empty' state.
- The __del__ methods are actually needed in this case (well, in the  
_real_ code anyway). The python code loads a module written in C++  
and some of the member variables actually point to C++ objects  
created dynamically, so one actually has to call their destructors  
before unbinding the python var.

I tried to get things down to as small as possible, but when I found  
out that the size of the classes seems to contribute to the issue  
(removing enough member variables will bring you to a point where all  
of a sudden the speed increases a factor ten, there seems to be some  
breakpoint depending on the size of the classes) I could not simply  
remove all members but had to give them funky names. I kept the main  
structure of things, though, to see if that would solicit comments.  
(And it did...)

>
>
> In a number of cases, you use a dict like this:
>
>      built_classes  = {}
>      for i in LINES:
>          built_classes[len(built_classes)] = ...
>
> So you're using the indices 0, 1, 2, ... as the keys. That's not what
> dictionaries are made for; lists are much better for that:
>
>      built_classes = []
>      for i  in LINES:
>          built_classes.append(...)

Yeah, I inherited that part...

>
> Your readLines() function reads a whole file into memory. If you're
> working with large files, that's not such a good idea. It's better to
> load one line at a time into memory and work on that. I would even
> completely remove readLines() and restructure ReadClasses() like this:

Actually, part of what I removed was the real reason why readLines()  
is there at all: it reads files in blocks of (at most) some_number  
lines, and keeps track of the line offset in the file. I kept this  
structure hoping that someone would point out something obvious like  
some internal buffer going out of scope or whatever.

All right, thanks for the tips. I guess the issue itself is still  
open, though.

Cheers,
Jeroen

Jeroen Hegeman
jeroen DOT hegeman AT gmail DOT com

WARNING: This message may contain classified information. Immediately  
burn this message after reading.





From mail at microcorp.co.za  Sat Sep  1 04:18:03 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 1 Sep 2007 10:18:03 +0200
Subject: Non-Blocking IO
References: <1188614575.647228.248640@k79g2000hse.googlegroups.com>
Message-ID: <01f501c7ec71$4cce5a40$03000080@hendrik>

 "mp" <mail....il.com> wrote:


> Calling try3() yields the error:
>   File "./test.py", line 54, in try3
>     print os.read(fout.fileno(),256)
> OSError: [Errno 35] Resource temporarily unavailable

This means there is no data available- its actually working!

- Hendrik



From gagsl-py2 at yahoo.com.ar  Mon Sep 17 15:20:19 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 17 Sep 2007 16:20:19 -0300
Subject: Reading text files where last line has no EOL
References: <1190027021.235110.286450@g4g2000hsf.googlegroups.com>
	<mailman.649.1190028577.2658.python-list@python.org>
	<1190030558.568678.77370@y42g2000hsy.googlegroups.com>
Message-ID: <op.tytbz5nrx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 17 Sep 2007 09:02:38 -0300, BlueBird <phil at freehackers.org>  
escribi?:

> Oooooooops. It was a stupid bug in my script: textLine[:-
> int(textLine[-1]=='\n')] is not what I want (the real code was not a
> one-liner)! The documentation made me think that something wrong was
> going on with python but I should have known better.

If that expression is supposed to remove the trailing newline, I suggest  
using
textLine = textLine.rstrip('\n')

-- 
Gabriel Genellina



From lycka at carmen.se  Fri Sep 28 04:49:51 2007
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 28 Sep 2007 10:49:51 +0200
Subject: A question on python performance.
In-Reply-To: <mailman.1191.1190930173.2658.python-list@python.org>
References: <mailman.1191.1190930173.2658.python-list@python.org>
Message-ID: <fdif7f$n7p$1@wake.carmen.se>

Joe Goldthwaite wrote:
> I didn't know about the getattr function. I tried to search for that
> type of function but not knowing how to word the search request,
> I couldn't find it. 

You should really read through chapter 2 (Built-in Objects) of the
library reference. All that stuff is core Python functionality that
you should be aware of. Reading chapter 3 (Built-in Types) is also
a really good idea. A lot of the rest is good too, but there is
really no excuse for not knowing the contents of those chapters. ;)
It's just a few pages, and very useful to know. Read them now!


From mauro.tiz at gmail.com  Wed Sep 26 04:16:02 2007
From: mauro.tiz at gmail.com (mauro)
Date: Wed, 26 Sep 2007 01:16:02 -0700
Subject: Python class method as an argument of a function in a C extension
Message-ID: <1190794562.037602.317840@22g2000hsm.googlegroups.com>

Hi all,

I am trying to wrap some C code using SWIG (win32, mingw). I am new to
SWIG and to the Python/C API so what I am doing is looking at the
examples and trying to fit them to my needs, but I cannot find any
complete demo example of a C function taking as an argument a Python
function defined by the user.

What I am trying to do is to pass a class method as an argument of a
function defined in a C extension:

# file: runme.py

import myCExtensionModule

class MyClass:
	def __init__(self):
		self.myCounter = 0
		self.myVar     = 0
	def myMethod(self, myArg):
		self.myCounter += 1
		return self.myVar + myArg
	def runMe(self):
		myCExtensionModule.aCFunction(self.myMethod, 10)

x = MyClass()
x.runMe()

# end of runme.py

Can anybody give me an hint (or some link) on how to define
'aCFunction' and how to call 'self.myMethod' in the C source code?

Thank you very much for any kind of help!



From steve at holdenweb.com  Tue Sep  4 01:56:17 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 03 Sep 2007 22:56:17 -0700
Subject: So what exactly is a complex number?
In-Reply-To: <7xk5r7dm53.fsf@ruckus.brouhaha.com>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>	<mailman.4.1188866709.21370.python-list@python.org>	<roy-3C221C.22043603092007@news.panix.com>	<mailman.8.1188882659.2658.python-list@python.org>
	<7xk5r7dm53.fsf@ruckus.brouhaha.com>
Message-ID: <fbis23$t5k$1@sea.gmane.org>

Paul Rubin wrote:
> Steve Holden <steve at holdenweb.com> writes:
>> but the reals aren't. Clearly you *can* take the square root of all
>> real numbers, since a real number *is* also a complex number with a
>> zero imaginary component. They are mathematically equal and equivalent.
> 
> Ehhh, I let it slide before but since the above has been said a few
> times I thought I better mention that it's mathematically a bit bogus.
> We could say there is an embedding of the real numbers in the complex
> numbers (i.e. the set of complex numbers with Im z = 0).  But the
> usual mathematical definition of the reals (as a set in set theory) is
> a different set from the complex numbers, not a subset.  Also, for
> example, the derivative of a complex valued function means something
> considerably stronger than the derivative of a real valued function.
> The real valued function
> 
>   f(x) = { exp(-1/x**2, if x != 0,
>          { 0, if x = 0
> 
> for real x is infinitely differentiable at x=0 and all the derivatives
> are 0, which makes it sound like there's a Taylor series that
> converges to 0 everywhere in some neighborhood of x=0, which is
> obviously wrong since the function itself is nonzero when x!=0.  The
> discrepancy is because viewed as a complex valued function f(z), f is
> not differentiable at z=0 even once.
> 
> It's pretty normal for a real function f to have a first derivative at
> x, but no second derivative at x.  That can't happen with complex
> functions.  If f'(z) exists for some z, then f is analytic at z which
> means that all of f's derivatives exist at z and there is some
> neighborhood of z in which the Taylor series centered at z converges.

Much as I'd like to argue with that I can't, dammit :-)

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From f.guerrieri at gmail.com  Wed Sep  5 07:07:56 2007
From: f.guerrieri at gmail.com (Francesco Guerrieri)
Date: Wed, 5 Sep 2007 13:07:56 +0200
Subject: Looping through File Question
In-Reply-To: <1188989934.436165.213680@w3g2000hsg.googlegroups.com>
References: <1188989934.436165.213680@w3g2000hsg.googlegroups.com>
Message-ID: <79b79e730709050407m7b13a19eh72f8638ccfa65e81@mail.gmail.com>

On 9/5/07, planetmatt <planetmatt at gmail.com> wrote:
>
> I am a Python beginner.  I am trying to loop through a CSV file which
> I can do.  What I want to change though is for the loop to start at
> row 2 in the file thus excluding column headers.
>
> At present I am using this statement to initiate a loop though the
> records:
>
> for line in f.readlines():
>
> How do I start this at row 2?
>

you can simply call (and maybe throw away) f.readline() a single time before
looping.
If the lenght of the first line is fixed, you can also use f.seek to start
reading from the second row.

francesco
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From steve at holdenweb.com  Mon Sep 24 15:57:55 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 24 Sep 2007 15:57:55 -0400
Subject: SOAPpy Error
In-Reply-To: <46F7BEE1.300@gmail.com>
References: <46F7867F.3090607@gmail.com> <46F7BEE1.300@gmail.com>
Message-ID: <fd94s2$s39$1@sea.gmane.org>

linuxprog wrote:
> linuxprog a ?crit :
[obscure soappy question]

[...]

>> wha's wrong ?
>>
>> Thanks
>>
> still no answer !?

Four hours, and the Intarweb hasn't come up with the answer to your 
question?!?!?!?!?!?!?!

I'd ask Al Gore for your money back if I were you ...

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Sep 13 18:20:55 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 14 Sep 2007 00:20:55 +0200
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<5ksoaoF5am8cU1@mid.individual.net>
	<1189701793.466307.93210@g4g2000hsf.googlegroups.com>
	<5ktfjqF5ctrvU2@mid.individual.net>
	<46e98fd8$0$27757$426a34cc@news.free.fr>
Message-ID: <5ktre7F5ig0vU1@mid.individual.net>

Bruno Desthuilliers wrote:
> Bjoern Schliessmann a ?crit :

>> Why don't you make a preprocessor which accepts method
>> declarations without "self" and fixes them?
> 
> The problem being that there's no such thing as a "method
> declaration" in Python 

Yep, there are only definitions. I'm sorry.

> - only functions being attributes of a class...

What, IYHO, is the difference between a method and a function?

> (ok, I know, you meant "functions declared within a class
> statement").

I think that those functions _are_ special ones since the compiler
is able to make "method(instance, a, b)" out of 
"instance.method(a, b)". So IMHO, "method definition" makes sense.

Regards,


Bj?rn

-- 
BOFH excuse #144:

Too few computrons available.



From paul.nospam at rudin.co.uk  Fri Sep  7 12:44:12 2007
From: paul.nospam at rudin.co.uk (Paul Rudin)
Date: Fri, 07 Sep 2007 17:44:12 +0100
Subject: Organizing Code - Packages
References: <1189177596.960379.244990@w3g2000hsg.googlegroups.com>
	<46e17143$0$6189$426a74cc@news.free.fr>
	<1189183088.922537.18290@r34g2000hsd.googlegroups.com>
Message-ID: <87r6laa0ir.fsf@rudin.co.uk>

xkenneth <xkenneth at gmail.com> writes:

>> Ah, yes, a couple of things:
>> - avoid the 'one-class-per-file' syndrom. It's perfectly ok to have tens
>
> Yes but i find it hard to edit classes easily when I have more than
> one class per file.

Why?


From rrr at ronadam.com  Sun Sep 23 04:13:11 2007
From: rrr at ronadam.com (Ron Adam)
Date: Sun, 23 Sep 2007 03:13:11 -0500
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <13faa66cb1phre1@corp.supernews.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>	<mailman.900.1190414696.2658.python-list@python.org>	<1190415741.380795.259050@y42g2000hsy.googlegroups.com>	<13f8unjjeqs5p97@corp.supernews.com>	<mailman.916.1190444594.2658.python-list@python.org>
	<13faa66cb1phre1@corp.supernews.com>
Message-ID: <fd576j$pif$1@sea.gmane.org>



Scott David Daniels wrote:
> Ron Adam wrote:
>>
>> Scott David Daniels wrote:
>>> Cristian wrote:
>>>> On Sep 21, 3:44 pm, Ron Adam <r... at ronadam.com> wrote:
>>>>
>>>>> I think key may be to discuss names and name binding with your friend.
>>> Here's an idea:
>>>
>>> import math
>>>
>>> def sin_integral(start, finish, dx): ...
>>> def cos_integral(start, finish, dx): ...
>>> generalize and separate the integration technique from the
>>> function it integrates.
>> How about this?
>> It's based on the apple basic program example in How to Enjoy Calculus.
>>    Ron
>>
>> import math
>> def integrate(fn, x1, x2, n=100):...
>> def fn(x): ...
>> print "Area of fn:", integrate(fn, 0, 2)
>> print "Area of cos fn:", integrate(math.cos, 1, 2)
> 
> The point was a pedagogic suggestion, i.e. 

I understood your point.  I just found it interesting since I've been 
trying to extend my math (for use with python) skills in this area.


>"Try taking your
> friend along this path."   I wasn't trying to do a particularly
> good job integrating, simply trying to show how you could
> motivate first-class functions by showing a "useful" and
> "fun" (at least to an engineer) function that cries out
> for higher order functions.  In my experience engineers
> often want a "reason its useful" before engaging with an
> idea.  I'll bet that after a few such experiences he'll see
> how passing around functions and (later) making functions from
> from functions is a great tool to have in his toolbox.  Once
> he sees that, there will be no problem.

Yes, I agree. Another useful thing I've found is to store functions in a 
dictionary and call them (dispatching) based on some data value.

Ron



From larry.bates at websafe.com  Wed Sep 12 13:18:50 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Wed, 12 Sep 2007 12:18:50 -0500
Subject: Get the complete command line as-is
In-Reply-To: <1189566000.793354.308420@19g2000hsx.googlegroups.com>
References: <1189566000.793354.308420@19g2000hsx.googlegroups.com>
Message-ID: <ceKdneUSc6DqgnXbnZ2dnUVZ_saknZ2d@comcast.com>

wangzq wrote:
> Hello,
> 
> I'm passing command line parameters to my browser, I need to pass the
> complete command line as-is, for example:
> 
> test.py "abc def" xyz
> 
> If I use ' '.join(sys.argv[1:]), then the double quotes around "abc
> def" is gone, but I need to pass the complete command line ("abc def"
> xyz) to the browser, how can I do this?
> 
> I'm on Windows.
> 
> Thanks.
> 
Question: If you don't want to parse this as a command line, why don't you read 
it as data via raw input or from some configuration file?

something like:

python program (pgm.py):

cmdline=raw_input("enter your parameters")


external file (cmd.txt):

"abc def" xyz

python pgm.py < cmd.txt

-Larry


From max at alcyone.com  Sat Sep 22 17:17:12 2007
From: max at alcyone.com (Erik Max Francis)
Date: Sat, 22 Sep 2007 14:17:12 -0700
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <1190454275.282176.90830@k79g2000hse.googlegroups.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<1190413322.962737.53900@r29g2000hsg.googlegroups.com>
	<1190414192.636397.146450@57g2000hsv.googlegroups.com>
	<1190443748.907702.154660@22g2000hsm.googlegroups.com>
	<7xlkazgpc5.fsf@ruckus.brouhaha.com>
	<1190447257.060479.141280@n39g2000hsh.googlegroups.com>
	<5lk2olF8gic1U5@mid.uni-berlin.de>
	<1190454275.282176.90830@k79g2000hse.googlegroups.com>
Message-ID: <zfCdndEutb_EG2jbnZ2dnUVZ_o3inZ2d@speakeasy.net>

Kay Schluehr wrote:

> I checked out Io once and I disliked it. I expected Io's prototype OO
> being just a more flexible variant of class based OO but Io couples a
> prototype very closely to its offspring. When A produces B and A.f is
> modified after production of B also B.f is modified. A controls the
> state of B during the whole lifetime of B. I think parents shall not
> do this, not in real life and also not in programming language
> semantics.

It sounds like you're talking about some language other than Io, or 
didn't delve deeply enough into it, since Io makes no such requirements.

The attribute and method (not made distinct in Io; they're called 
"slots") is much the same as with Python; the current instance is 
checked for the object, then its parents, then _its_ parents, and so on.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   No man quite believes in any other man.
    -- H.L. Mencken


From mail at timgolden.me.uk  Thu Sep 13 05:25:38 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 13 Sep 2007 10:25:38 +0100
Subject: Get the complete command line as-is
In-Reply-To: <fcavaf$rh9$1@sea.gmane.org>
References: <1189566000.793354.308420@19g2000hsx.googlegroups.com>	<fc83v4$cb3$1@news2.u-psud.fr>	<1189647903.978946.38350@r29g2000hsg.googlegroups.com>
	<fcavaf$rh9$1@sea.gmane.org>
Message-ID: <46E90212.1080502@timgolden.me.uk>

Thomas Heller wrote:
> Better would be this code:
> 
> import ctypes
> ctypes.windll.kernel32.GetCommandLineA.restype = ctypes.c_char_p
> print ctypes.windll.kernel32.GetCommandLineA()

Or you could use pywin32:

<code>
import win32api

print win32api.GetCommandLine ()

</code>

TJG


From steve at holdenweb.com  Wed Sep  5 19:49:33 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 05 Sep 2007 16:49:33 -0700
Subject: Any syntactic cleanup likely for Py3? And what about doc
	standards?
In-Reply-To: <200709060128.03248.python@cx.hu>
References: <46DEFD2E.5050205@sbcglobal.net>	<mailman.112.1189022368.2658.python-list@python.org>	<1189024274.627827.285050@o80g2000hse.googlegroups.com>
	<200709060128.03248.python@cx.hu>
Message-ID: <fbnfad$hmr$2@sea.gmane.org>

Ferenczi Viktor wrote:
> Hello,
> 
>>> from property_support import hasProperties, Property
>>>
>>> @hasProperties
>>> class Sphere(object):
>>>     def setRadius(self, value):
>>>         ... some setter implementation ...
>>>     radius=Property(default=1.0, set=setRadius, type=(int, float))
>>>     color=Property(default='black', allowNone=True)
>>>
>>> This is a cleaner syntax if you need automatic default setter/getter
>>> implementations with type checking, default values, etc
> 
>> I really distaste this "etc." in your description. In the end you
>> promote endless lists of command line parameters to configure every
>> possible function. I also doubt that the solution is more clean but
>> arbitray instead.
> 
> Py3K does not enforce any particular use of the class decorator function. This 
> was only an example.
> 
>> My own guess why properties are not promoted with more emphasis is
>> that they lead to cargo cult programming i.e. everyone starts to use
>> property syntax even when usual attributes are sufficient. So the
>> syntax might even be intentionally ugly.
> 
> AFAIK there is no such a thing as "intentionally ugly" in the Python language. 
> I've never read this sentence before in manuals, tutorials, etc.
> 
Perhaps not, but ...

  http://mail.python.org/pipermail/python-dev/2005-September/056846.html

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From ldo at geek-central.gen.new_zealand  Thu Sep  6 22:52:33 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Fri, 07 Sep 2007 14:52:33 +1200
Subject: Checking if elements are empty
References: <2323A6D37908A847A7C32F1E3662C80E010A0246@dc1ex01.air.org>
	<fbme5d$qa$1@sea.gmane.org>
	<mailman.93.1189003016.2658.python-list@python.org>
Message-ID: <fbqedh$31g$1@lust.ihug.co.nz>

In message <mailman.93.1189003016.2658.python-list at python.org>, Chris Mellon
wrote:

> On 9/5/07, Steve Holden <steve at holdenweb.com> wrote:
>> Doran, Harold wrote:
> 
>> >
>> > Is there a way to check if the first element of y is null?
>> >
>>
>> len(y[0]) == 0
>>
>> would be the obvious way, assuming "null" means "the null string".
>>
> 
> Better spelled as
> 
> if y[0]:

Not a good idea.


From larry.bates at websafe.com  Mon Sep 17 10:54:00 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Mon, 17 Sep 2007 09:54:00 -0500
Subject: "once" assigment in Python
In-Reply-To: <1189750616.597409.85380@w3g2000hsg.googlegroups.com>
References: <1189750616.597409.85380@w3g2000hsg.googlegroups.com>
Message-ID: <1uSdnaFGwMuICHPbnZ2dnUVZ_tijnZ2d@comcast.com>

Lorenzo Di Gregorio wrote:
> Hello,
> 
> I've been using Python for some DES simulations because we don't need
> full C speed and it's so much faster for writing models.  During
> coding I find it handy to assign a variable *unless it has been
> already assigned*: I've found that this is often referred to as "once"
> assigment.
> 
> The best I could come up with in Python is:
> 
> try:
>   variable
> except NameError:
>   variable = method()
> 
> I wonder if sombody has a solution (trick, whatever ...) which looks
> more compact in coding.  Something like:
> 
> once(variable, method)
> 
> doesn't work, but it would be perfect.  Of course I can preprocess the
> Python code but an all-Python solution would be more handy.
> 
> Any suggestions?
> 
> Thx in advance,
> Lorenzo
> 
IMHO variables like what you describe are really data not program variables. 
You might consider putting variables like these in a dictionary and then check 
to see if the keys exist before assignment:

var_dict={}

#
# See if 'varname' initialized, if not it needs to be
#
if 'varname' not in var_dict:
      var_dict[varname]=somevalue

-Larry


From tjreedy at udel.edu  Fri Sep 28 21:55:35 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 28 Sep 2007 21:55:35 -0400
Subject: cute use of lambda
References: <1190945901.551940.165240@k79g2000hse.googlegroups.com>
Message-ID: <fdkbao$bnl$1@sea.gmane.org>


"Simon Forman" <sajmikins at gmail.com> wrote in message 
news:1190945901.551940.165240 at k79g2000hse.googlegroups.com...
| class FakeQueue(list):
|    put = list.append
|    get = lambda self: self.pop(0)

Sorry, to me this is a foolish use of lambda as it is exactly the same as

  def get(self): self.pop(0)

except that in the latter, the resulting function object gets a proper 
internal name instead of '<lambda>', therefore giving a more informative 
traceback in case of an exception.

tjr





From nagle at animats.com  Fri Sep 28 11:53:55 2007
From: nagle at animats.com (John Nagle)
Date: Fri, 28 Sep 2007 15:53:55 GMT
Subject: Python 3.0 migration plans?
In-Reply-To: <1i555ag.9ez4uvf4583jN%aleax@mac.com>
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>
	<%q0Li.725$ih1.539@nlpi068.nbdc.sbc.com>
	<1i555ag.9ez4uvf4583jN%aleax@mac.com>
Message-ID: <ns9Li.1172$4V6.1092@newssvr14.news.prodigy.net>

Alex Martelli wrote:
> John Nagle <nagle at animats.com> wrote:
> 
>> TheFlyingDutchman wrote:
>>> It seems that Python 3 is more significant for what it removes than
>>> what it adds.
>>>
>>> What are the additions that people find the most compelling?
>>     I'd rather see Python 2.5 finished, so it just works.
> 
> And I'd rather see peace on Earth and goodwill among men than _either_
> Python 3 or your cherished "finished" 2.5 -- the comparison and implied
> tradeoff make about as much sense as yours.

     Insofar as Python has an organization, it's not adequately managing
extension modules.  Each extension module has its own infrastructure,
with its own build procedures, its own bug list, and its own maintainers.
There's not even an archive.  Unlike CPAN, Cheese Shop is just a directory of
URLs.

     Take a look at how Perl does it.  Here are the instructions on
how to contribute to CPAN:

	http://www.cpan.org/modules/04pause.html

There's a way to get your module into the system, a standardized format,
build, and installation procedure, and an archive which is mirrored.
There's a common bug reporting system.  Modules abandoned by their
original developers are not lost, and can be "adopted" by someone else.

     Python doesn't have any of this.  And that's far more of a problem
than Python 3.x.

				John Nagle


From robert.kern at gmail.com  Thu Sep 20 14:08:00 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 20 Sep 2007 13:08:00 -0500
Subject: distutils, extensions, and missing headers
In-Reply-To: <1190297193.864613.13890@i13g2000prf.googlegroups.com>
References: <1190268535.052437.226240@v23g2000prn.googlegroups.com>	<mailman.791.1190272989.2658.python-list@python.org>
	<1190297193.864613.13890@i13g2000prf.googlegroups.com>
Message-ID: <fcucu1$179$1@sea.gmane.org>

Gary Jefferson wrote:
> On Sep 20, 1:22 am, Robert Kern <robert.k... at gmail.com> wrote:
>> Use the "headers" keyword to setup() to list the header files you want installed.
> 
>   I've tried "headers=['header1.h', 'header2.h']" in setup() as well
> as in Extension(), and neither seem to get the files into the bdist or
> bdist_rpm tarball.  Am I doing it wrong?  I can't seem to find any
> examples that use this via google.

You might need an accurate relative path. I'm assuming that you don't actually
keep header1.h and header2.h in the top-level directory next to the setup.py.

-- 
Robert Kern

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



From carsten at uniqsys.com  Fri Sep  7 09:07:49 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 07 Sep 2007 09:07:49 -0400
Subject: How to convert None to null value
In-Reply-To: <eb3f41b30709070219h1b32aacj8f6daac23cd02807@mail.gmail.com>
References: <eb3f41b30709070219h1b32aacj8f6daac23cd02807@mail.gmail.com>
Message-ID: <1189170469.3367.25.camel@dot.uniqsys.com>

On Fri, 2007-09-07 at 11:19 +0200, pradeep kumar wrote:
> Hi ,
> 
> i am trying to insert records from one table to another table in
> postgres sql using the the following code 
> 
> posConn.query("insert into
> usr(usr_id,usr_name,usr_passwd,grp_cde,usr_type,usr_chk_till_val, \ 
> 
> usr_active,usr_daily_auth,usr_lst_login,usr_lst_logout,usr_shift_id,usr_role_level) values \
>              ('%s','%s','%s',%s,%i,%d,'%s',%i,%i,%i,%i,%i)"
> %(row[0],row[1],row[2],row[3],row[4],row[5], \ 
>               row[7],row[8],row[10],row[11],row[12],row[14]) )
> 
> here row[4] column is having null value so python consides it as None
> but will insert into the table it inserts as None not null value 
> 
> please help how to convert None to null value 

If you were using a DB-API compliant module, you should use parameter
binding instead of building query strings by hand:
http://informixdb.blogspot.com/2007/07/filling-in-blanks.html

However, nothing in DB-API has a .query method, so either you're using a
module that's not conforming to DB-API, or you're using some kind of
wrapper around a DB-API module. In any case, you should try to find out
how to do parameter binding with whatever it is you're using. If it
doesn't have a parameter binding mechanism, you should throw it away and
replace it with a DB-API complaint module.

HTH,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From aleax at mac.com  Sun Sep  2 14:46:50 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 2 Sep 2007 11:46:50 -0700
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
	<1188735642.391419.103650@19g2000hsx.googlegroups.com>
	<1188740716.423349.304370@y42g2000hsy.googlegroups.com>
	<1188742231.470668.29910@g4g2000hsf.googlegroups.com>
	<1i3t4ha.1r0xx7414w0taxN%aleax@mac.com>
	<1188754943.512850.158320@y42g2000hsy.googlegroups.com>
Message-ID: <1i3t9p0.16643k010dbwtnN%aleax@mac.com>

Mark Dickinson <dickinsm at gmail.com> wrote:

> On Sep 2, 12:55 pm, al... at mac.com (Alex Martelli) wrote:
> > Mark Dickinson <dicki... at gmail.com> wrote:
> > > Well, for one thing, you're creating half a million xrange objects in
> > > the course of the search.  All the C code has
> > > to do is increment a few integers.
> >
> > I don't think the creation of xrange objects is a meaningful part of
> > Python's execution time here.  Consider:
> > [...]
> 
> Agreed---I just came to the same conclusion after doing some tests.
> So maybe it's the billion or so integer objects being created that
> dominate the running time?  (Not sure how many integer objects
> actually are created here: doesn't Python cache *some* small
> integers?)

Yep, some, say -5 to 100 or thereabouts; it also caches on a free-list
all the "empty" integer-objects it ever has (rather than returning the
memory for the system), so I don't think there's much optimization to be
had on that score either.


Alex


From pydecker at gmail.com  Wed Sep 12 21:42:06 2007
From: pydecker at gmail.com (Peter Decker)
Date: Wed, 12 Sep 2007 21:42:06 -0400
Subject: Python 3K or Python 2.9?
In-Reply-To: <87sl5j5r34.fsf@benfinney.id.au>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<87sl5j5r34.fsf@benfinney.id.au>
Message-ID: <ca55a9900709121842o54556361kba4e1067e94be8eb@mail.gmail.com>

On 9/12/07, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> TheFlyingDutchman <zzbbaadd at aol.com> writes:
>
> > I am talking about how an author describes in English the "this"
> > pointer/reference in their book on programming C++ or Java.
> >
> > I don't think you will find them saying that under the covers "this"
> > was passed to the method (if in fact it is). They just say that it
> > refers to the current object inside that object's method.
>
> In other words, it's magic, and the behaviour has to be explained so
> the reader knows where the undeclared 'this' comes from.
>
> How is that preferable to the magic of "instance is passed as the
> first argument to a method"?

So everything that isn't passed explicitly is "magic"? I suppose
__builtin__ counts as magic, too?

Define 'self' as a keyword, and its usage becomes no more magical than
'def' or 'break'.

-- 

# p.d.


From bjorn.kempen at gmail.com  Sun Sep 16 06:02:59 2007
From: bjorn.kempen at gmail.com (buffi)
Date: Sun, 16 Sep 2007 10:02:59 -0000
Subject: generate list of partially accumulated values
In-Reply-To: <1189936564.932553.148800@50g2000hsm.googlegroups.com>
References: <1189936564.932553.148800@50g2000hsm.googlegroups.com>
Message-ID: <1189936979.276166.103080@w3g2000hsg.googlegroups.com>

On Sep 16, 11:56 am, cesco <fd.calabr... at gmail.com> wrote:
> Hi,
>
> I have the following list:
> l = [1, 2, 3, 4]
> and I'd like to obtain a list like the following:
> l_partial_sum = [1, 3, 6, 10] (that is [1, 1+2, 1+2+3, 1+2+3+4])
>
> Is there a simple way to accomplish this?
>
> I came up with the following solution but it seems a bit too
> elaborated for the task:
> l_partial_sum = [reduce(lambda x,y:x+y, sub_l) for sub_l in [l[:i+1]
> for i in range(len(l))]]
>
> Any help will be appreciated.
>
> Thanks
> Francesco

>>> l = [1, 2, 3, 4]
>>> [sum(l[:x+1]) for x in xrange(len(l))]
[1, 3, 6, 10]

- Bj?rn Kemp?n



From duncan.booth at invalid.invalid  Thu Sep 27 13:06:30 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 27 Sep 2007 17:06:30 GMT
Subject: True of False
References: <1190910814.594559.30880@n39g2000hsh.googlegroups.com>
	<5m254hFatlbuU2@mid.uni-berlin.de>
Message-ID: <Xns99B8B834EFB61duncanbooth@127.0.0.1>

Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:

> In [268]: 'c' in a == True
> Out[268]: False
> 
> In [269]: ('c' in a) == True
> Out[269]: True
> 
> In [270]: 'c' in (a == True)
> -----------------------------------------------------------------------
> ---- 
><type 'exceptions.TypeError'>             Traceback (most recent call
>last) 
> 
> /home/bj/<ipython console> in <module>()
> 
><type 'exceptions.TypeError'>: argument of type 'bool' is not iterable
> 
> 
> What's going on there?

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

> Comparisons can be chained arbitrarily, e.g., x < y <= z is equivalent
> to x < y and y <= z, except that y is evaluated only once (but in both
> cases z is not evaluated at all when x < y is found to be false). 

In exactly the same way:

   'c' in a == True

is equivalent to:

   'c' in a and a == True

which is False.




From hniksic at xemacs.org  Tue Sep 18 11:41:46 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Tue, 18 Sep 2007 17:41:46 +0200
Subject: super() doesn't get superclass
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
Message-ID: <87abrkhtfp.fsf@mulj.homelinux.net>

Bruno Desthuilliers <bruno.42.desthuilliers at wtf.websiteburo.oops.com> writes:

> If a class X is in the MRO of call Y, then X is a superclass of Y. I
> agree that the documentation for super is somewhat misleading (and
> obviously wrong), but it still *give access to* (at least one of)
> the superclass(es).

I believe the confusion comes from different assumptions about what
"superclasses" refers to.  super() iterates over superclasses of the
*instance* in use, but an individual call to super does not
necessarily invoke the superclass of the *implementation* of the
method.  For example, given a random class:

class X(Y):
  def foo(self):
    super(X, self).foo()

...there is in fact no guarantee that super() calls a superclass of
X.  However, it is certainly guaranteed that it will call a superclass
of type(self).

Pre-2.2 Python used a simpler scheme where the superclass was always
called, but it caused problems with diamond inheritance where some
methods would be called either twice or not at all.  (This is
explained in http://www.python.org/download/releases/2.2.3/descrintro/
in some detail.)


From vriolk at gmail.com  Mon Sep 24 12:19:08 2007
From: vriolk at gmail.com (coldpizza)
Date: Mon, 24 Sep 2007 09:19:08 -0700
Subject: database persistence with mysql, sqlite
In-Reply-To: <mailman.993.1190636458.2658.python-list@python.org>
References: <1190502677.970811.181100@22g2000hsm.googlegroups.com>
	<mailman.993.1190636458.2658.python-list@python.org>
Message-ID: <1190650748.590245.221490@n39g2000hsh.googlegroups.com>

On Sep 24, 7:23 am, Lawrence D'Oliveiro <l... at geek-
central.gen.new_zealand> wrote:
> In message <1190502677.970811.181... at 22g2000hsm.googlegroups.com>, coldpizza
> wrote:
>
> > So far, with mysql I use 'SELECT * FROM TABLE LIMIT L1, L2' where L1
> > and  L2 define the range for the 'Next' and 'Previous' commands. I
> > have to run the query every time a click a 'Next/Prev' link. But I am
> > not sure that this is the best and most efficient way.

> Try it first, then see what happens. Remember, premature optimization is the
> root of all (programming) evil.

It turned out that the method above ('SELECT * FROM TABLE LIMIT L1,
L2') works ok both with mysql and sqlite3, therefore I have decided to
stick with it until I find something better. With Sqlite3 you are
supposed to use LIMIT 10 OFFSET NN, but it also apparently supports
the mysql syntax (LIMIT NN, 10) for compatibility reasons.



From python at hope.cz  Sat Sep 29 16:03:14 2007
From: python at hope.cz (Johny)
Date: Sat, 29 Sep 2007 13:03:14 -0700
Subject: How to unload a module after I've imported it.
Message-ID: <1191096194.002683.16240@50g2000hsm.googlegroups.com>

Is it possible to unload a module after I've imported it.
I have the main program from which I import several smaller programs.
Some of these uses timeoutsocket module.
But one of the smaller program can not work with the timeoutsocket
module, so I must
unload the timeoutsocket module, execute the program and  then  reload
timeoutsocket module.
So, s it possible to unload a module after I've imported it..
Thanks
L.



From ematus at gmail.com  Fri Sep 21 22:41:18 2007
From: ematus at gmail.com (Eduardo Matus)
Date: Fri, 21 Sep 2007 22:41:18 -0400
Subject: Gobject
Message-ID: <984ad6a0709211941g5bcffc7te9aa35bdef7eac83@mail.gmail.com>

hi all... I'm trying to get a event when a pipe of a process is no longer
receiving data, in this case a EOF...
the process start with no problems... but... the gobject_io_add_watch does
not trigger the test method when the file in mplayer has finish... any
ideas??
Thks :)

the codes is this (the relevant part):

import gobject, sys,os

<python-list at python.org>    def play(self,opciones ,target):
        mpc = "mplayer -slave -quiet \"" + target + "\" 2>/dev/null"
        self.pin, self.pout = os.popen2(mpc)  #open pipe
        self.startEofHandler()

    def startEofHandler(self):
        self.eofHandler = gobject.io_add_watch(self.pout, gobject.IO_HUP,
self.test)


    def test(self,source,condition):
        print 'Something happend!!'
        print source
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From pistacchio at gmail.com  Fri Sep  7 04:07:03 2007
From: pistacchio at gmail.com (gu)
Date: Fri, 07 Sep 2007 10:07:03 +0200
Subject: unexpected behavior: did i create a pointer?
Message-ID: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>

hi to all!
after two days debugging my code, i've come to the point that the 
problem was caused by an unexpected behaviour of python. or by lack of 
some information about the program, of course! i've stripped down the 
code to reproduce the problem:

<code>
a = {}

for x in range(10):
     for y in range(10):
         a[x,y] = "0"

copyOfA = a

def functionA(x,y):
     print a[x,y],
     copyOfA[x,y] = "*"
     print a[x,y],copyOfA[x,y]


for x in range(10):
     for y in range(10):
         functionA(x,y)

</code>


now, in the second "for" cycle and in functionA() i only 'touch' copyOfA 
(altering it). as i don't touch the variable "a", i expect it not to be 
affected by any change, but copyOfA acts like a pointer to a and 
altering copyOfA's values result in altering the values of "a", so the 
result that i expect is:
0 0 *
0 0 *
0 0 *
0 0 *
[..]

but i get:
0 * *
0 * *
0 * *
0 * *
[..]

what's going on?
thanks in advance.


From info at egenix.com  Wed Sep 12 11:23:19 2007
From: info at egenix.com (eGenix Team: M.-A. Lemburg)
Date: Wed, 12 Sep 2007 17:23:19 +0200
Subject: ANN: eGenix mxODBC and mxODBC Zope DA on 64-bit FreeBSD
Message-ID: <46E80467.2030100@egenix.com>

________________________________________________________________________

ANNOUNCING

               eGenix.com mxODBC Database Interface

              eGenix.com mxODBC Zope Database Adapter

                       for 64-bit FreeBSD


This announcement is also available on our web-site for online reading:
http://www.egenix.com/company/news/eGenix-mxODBC-on-FreeBSD-amd64-GA.html

________________________________________________________________________

eGenix mxODBC Distribution

The eGenix mxODBC Distribution is a Python database interface add-on
distribution for our eGenix mx Base Distribution. It comes with mxODBC,
our universal ODBC database interface for Python.

Customers who have purchased licenses for other platforms and wish to
move their installation to FreeBSD 64-bit, can do so without having to
buy a new license. The licenses will continue to work on the 64-bit
platform.

Users of mxODBC 2.0 will have to purchase new licenses from our online
shop in order to upgrade to mxODBC 3.0.

You can request 30-day evaluation licenses on the product page.

Downloads
---------

Please visit the eGenix mxODBC Distribution page for downloads,
instructions on installation and documentation of the packages.

    http://www.egenix.com/products/python/mxODBC/

Note that in order to use the eGenix mxODBC Distribution you need to
install the eGenix mx Base Distribution first.

________________________________________________________________________

eGenix mxODBC Zope DA


eGenix mxODBC Zope DA is our database interface for Zope and Plone. It
is based on the mxODBC interface.

Customers who have purchased licenses for other platforms and wish to
move their installation to FreeBSD 64-bit, can do so without having to
buy a new license. The licenses will continue to work on the 64-bit
platform.

You can request 30-day evaluation licenses on the product page.

Downloads
---------

Please visit the eGenix mxODBC Zope DA product page for downloads,
instructions on installation and documentation of the packages.

    http://www.egenix.com/products/zope/mxODBCZopeDA/

________________________________________________________________________

More Information

For more information on our products, licensing and download
instructions, please write to sales at egenix.com.

Enjoy,
-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, Sep 12 2007)
>>> Python/Zope Consulting and Support ...        http://www.egenix.com/
>>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
>>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________
2007-08-22: Released mxODBC 3.0.1              http://python.egenix.com/

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


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




From kar1107 at gmail.com  Tue Sep  4 19:05:38 2007
From: kar1107 at gmail.com (Karthik Gurusamy)
Date: Tue, 04 Sep 2007 23:05:38 -0000
Subject: how can I find out the process ids with a process name
In-Reply-To: <1188761187.522146.192380@y42g2000hsy.googlegroups.com>
References: <1188761187.522146.192380@y42g2000hsy.googlegroups.com>
Message-ID: <1188947138.904266.256440@r34g2000hsd.googlegroups.com>

On Sep 2, 12:26 pm, herman <Herman.Schu... at gmail.com> wrote:
> Hi,
>
> I would like to find out all the process id with the process name
> 'emacs'.
>
> In the shell, i can do this:
>
> $ ps -ef |grep emacs
> root     20731  8690  0 12:37 pts/2    00:00:09 emacs-snapshot-gtk
> root  25649 25357  0 13:55 pts/9    00:00:05 emacs-snapshot-gtk rtp.c
> root  26319 23926  0 14:06 pts/7    00:00:04 emacs-snapshot-gtk
> stressTestVideo.py
> root  26985     1  0 14:15 ?        00:00:01 /usr/bin/emacs-snapshot-
> gtk
> root     27472 21066  0 14:23 pts/5    00:00:00 grep emacs
>
> and I can see the process id is 20731, 25649, etc, etc.
>
> But now I would like to do the programmically in my python script.
> I know I can use ' os.system(cmd)' to execute the command 'ps -ef |
> grep emacs', but how
> can I pipe the output of my 'ps -ef | grep emacs' to my python script
> and then run a regression expression with it to get the process Ids?
>

Try commands module; it's simple to just get the output. subprocess
module is a newer way to doing things. But commands.getoutput() is lot
simpler for simple shell like tasks.

>>> import commands
>>> commands.getoutput("ps -ef | grep emacs | awk '{print $2}'")
'21739\n15937\n15287\n5097\n14797\n31777\n8779\n2973\n5413\n13024\n13026'
>>>

Your script can then use the output as its input.

Karthik

> Thank you.




From charles.fox at gmail.com  Wed Sep 12 10:43:51 2007
From: charles.fox at gmail.com (Charles Fox)
Date: Wed, 12 Sep 2007 07:43:51 -0700
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <46e7f450$0$12305$426a74cc@news.free.fr>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189604018.520338.162520@57g2000hsv.googlegroups.com>
	<46e7f450$0$12305$426a74cc@news.free.fr>
Message-ID: <1189608231.151112.147550@y42g2000hsy.googlegroups.com>

Thanks guys -- yeah these two stategies (short s.varname; and explicit
rescoping, a=self.a etc) are more or less what I was using.  That's
still kind of annoying though.

The s.varname approach still makes numerical code much harder to read.

I had a nasty bug with the boilerplate approach when forgetting to
reassign some of the variables back to members (self.a=a).  And that's
a lot of boilerplate you need -- I thought the python way was to
minimize redundant code?  (Ditching header files and curley brackets
was a main reason for me coming here).

I see the argument for making self explicit -- what would be wrong
with just .a instead of self.a though?  That's still explicit but much
easier to read.  (I think I've seen that somewhere else, is it C#?)



From xkenneth at gmail.com  Fri Sep  7 11:06:36 2007
From: xkenneth at gmail.com (xkenneth)
Date: Fri, 07 Sep 2007 15:06:36 -0000
Subject: Organizing Code - Packages
Message-ID: <1189177596.960379.244990@w3g2000hsg.googlegroups.com>

All,

    I apologize if this is a commonly asked question, but I didn't
find anything that answered my question while searching.

So what I have right now is a few packages that contain some commonly
used functions and another package that contains all of my custom
error classes. I want these error classes available to me in all of
the other packages in my library. Currently to achieve this at the top
of every module file I have the line "from My.Library.Errors import
*", my problem with this is that it manages to import the Errors into
every scope that they are used. I'm still pretty new to Python, and my
approachs are probably very rooted in C/C++ (I've had the hardest time
getting over not being able to overload functions), but am I doing
this correctly?

   Also, are there any good tutorials/examples out there of how to
organize your python code into packges?

Thanks for all the help!

Regards,
Ken



From zzbbaadd at aol.com  Fri Sep 21 00:22:23 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Thu, 20 Sep 2007 21:22:23 -0700
Subject: newb: BeautifulSoup
In-Reply-To: <1190343890.375836.78630@r29g2000hsg.googlegroups.com>
References: <1190343890.375836.78630@r29g2000hsg.googlegroups.com>
Message-ID: <1190348543.472684.243840@50g2000hsm.googlegroups.com>

On Sep 20, 8:04 pm, crybaby <joemystery... at gmail.com> wrote:
> I need to traverse a html page with big table that has many row and
> columns.  For example, how to go 35th td tag and do regex to retireve
> the content.  After that is done, you move down to 15th td tag from
> 35th tag (35+15) and do regex to retrieve the content?

Make the file an xhtml file (valid xml) if it isn't already and then
you can use software written to process XML files:

http://pyxml.sourceforge.net/topics/




From garyjefferson123 at yahoo.com  Fri Sep 21 00:43:54 2007
From: garyjefferson123 at yahoo.com (Gary Jefferson)
Date: Fri, 21 Sep 2007 04:43:54 -0000
Subject: calling extension's autoconf/make from distutils
Message-ID: <1190349834.894931.128050@q3g2000prf.googlegroups.com>

I've got a python extension that comes with its own standard autoconf/
automake system, and I can "python setup.py build" just fine with it
as long as I have previously done "./configure" in that directory.

However, 'python setup.py bdist_rpm' can't hope to have done './
configure' first, as it untars and tries to build the extension there.

Is there a hook for bdist_rpm (and friends) that will allow me to
insert a './configure' in the build process, sometime before it tries
to build the extension?

Thanks,
Gary



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Sep  7 03:49:29 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 07 Sep 2007 09:49:29 +0200
Subject: startswith( prefix[, start[, end]]) Query
In-Reply-To: <mailman.206.1189147329.2658.python-list@python.org>
References: <1189087752.538726.101350@r29g2000hsg.googlegroups.com>	<46e00d7e$0$16413$426a74cc@news.free.fr>	<1189145398.081080.59580@r34g2000hsd.googlegroups.com>
	<mailman.206.1189147329.2658.python-list@python.org>
Message-ID: <46e10284$0$439$426a34cc@news.free.fr>

Steve Holden a ?crit :
> TheFlyingDutchman wrote:
>>> Else, you could as well write your own testing function:
>>>
>>> def str_starts_with(astring, *prefixes):
>>>    startswith = astring.startswith
>>>    for prefix in prefixes:
>>>      if startswith(prefix):
>>>        return true
>>>    return false
>>>
>>
>> What is the reason for
>>   startswith = astring.startswith
>>   startswith(prefix)
>>
>> instead of
>>   astring.startswith(prefix)
>>
> It's an optimization: the assigment creates a "bound method" (i.e. a 
> method associated with a specific string instance) and avoids having to 
> look up the startswith method of astring for each iteration of the inner 
> loop.
> 
> Probably not really necessary, though, and they do say that premature 
> optimization is the root of all evil ...

I wouldn't call this one "premature" optimization, since it doesn't 
change the algorithm, doesn't introduce (much) complication, and is 
proven to really save on lookup time.

Now I do agree that unless you have quite a lot of prefixes to test, it 
might not be that necessary in this particular case...


From travelingwebs1 at gmail.com  Wed Sep 26 13:59:06 2007
From: travelingwebs1 at gmail.com (travelingwebs1 at gmail.com)
Date: Wed, 26 Sep 2007 17:59:06 -0000
Subject: Travel USA
Message-ID: <1190829546.266446.246520@g4g2000hsf.googlegroups.com>

http://world-traveling-destinations.blogspot.com/



From BjornSteinarFjeldPettersen at gmail.com  Thu Sep 20 04:01:56 2007
From: BjornSteinarFjeldPettersen at gmail.com (thebjorn)
Date: Thu, 20 Sep 2007 08:01:56 -0000
Subject: Sets in Python
In-Reply-To: <1190274620.912027.322880@50g2000hsm.googlegroups.com>
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
	<CeB*qHeVr@news.chiark.greenend.org.uk>
	<1190235483.412972.81280@v23g2000prn.googlegroups.com>
	<13f3m15igkstq2e@corp.supernews.com>
	<1190260923.243865.312190@z24g2000prh.googlegroups.com>
	<1190274620.912027.322880@50g2000hsm.googlegroups.com>
Message-ID: <1190275316.223732.191340@22g2000hsm.googlegroups.com>

On Sep 20, 9:50 am, thebjorn <BjornSteinarFjeldPetter... at gmail.com>
wrote:

it's bad form to reply to myself, I know, but

>     def __iter__(self):
>         for k in super(mdict,self).__iter__():
>             yield eval(k)

should probably be

    def __iter__(self):
        return (eval(k) for k in super(mdict,self).__iter__())

I'm still getting used to the power of generator expressions :-)

-- bjorn



From robert.kern at gmail.com  Sat Sep 22 03:03:47 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 22 Sep 2007 02:03:47 -0500
Subject: Getting rid of bitwise operators in Python 3?
In-Reply-To: <46f49740$0$32514$4c368faf@roadrunner.com>
References: <46f49740$0$32514$4c368faf@roadrunner.com>
Message-ID: <fd2eol$71g$1@sea.gmane.org>

Carl Banks wrote:
> Anyone with me here?  (I know the deadline for P3 PEPs has passed; this 
> is just talk.)

I'm not.  :-)

We use them in numpy. The bitwise operations on int and float arrays aren't all
that useful, but they are very useful for bool arrays. We can't use the
"and"/"or"/"not" keywords since they can't be overloaded, but they bitwise
operators fill the need fairly well. We've had
logical_and()/logical_or()/logical_not() functions since forever, too, and
they're a pain in the ass.

-- 
Robert Kern

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



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Sep 18 12:31:39 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 18 Sep 2007 18:31:39 +0200
Subject: Using pseudonyms (was Re: Python 3K or Python 2.9?)
In-Reply-To: <fcot65$1us$1@panix3.panix.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46ef893c$0$21882$426a34cc@news.free.fr>
	<fcop08$2ue$1@panix3.panix.com>
	<mailman.726.1190130940.2658.python-list@python.org>
	<fcot65$1us$1@panix3.panix.com>
Message-ID: <46effd63$0$16044$426a74cc@news.free.fr>

Aahz a ?crit :
> In article <mailman.726.1190130940.2658.python-list at python.org>,
> Steve Holden  <steve at holdenweb.com> wrote:
>> Aahz wrote:
>>> In article <46ef893c$0$21882$426a34cc at news.free.fr>,
>>> Bruno Desthuilliers  <bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote:
>>>> Aahz a ?crit :
>>>>> In article <46ee2d9d$0$26213$426a74cc at news.free.fr>,
>>>>> Bruno Desthuilliers  <bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote:
>>>>>> But what, given that I'm an AOL user still thinking it's kewl to hide 
>>>>>> behind a pseudo, what else would you expect ?
>>>>> What exactly is a "pseudo", pray tell?
>>>> Sorry : a pseudonym (a nickname).
>>> You apparently missed the thrust of my sarcasm.  You can't tell what is
>>> or is not a pseudonym online.  For all I know, "Bruno Desthulliers" is a
>>> pseudonym.  While I recognize that there is some social advantage to
>>> linking consistent identifiers with people, I have I think understandable
>>> irritation with people who insist that names follow certain patterns.
>>>
>>> (For those joining only recently, my full legal name is "Aahz", which I
>>> changed from my former name precisely because of attitudes like Bruno's.)

For the record, I usually don't give a damn about what 
name/nickname/whatever peoples use.

>> ... coupled with a certain bloody-mindedness that forces you to rub 
>> people's noses in your ability to choose to do so? ;-)
> 
> While there's certainly some truth to that, it is also the case that I
> have seen people like Bruno take exception to some people's born names.
> After all, there are people whose parents chose to name them "Moon Unit".

But then adding the lastname (ie 'Zappa') could clear the possible 
confusion !-)



From r-w at iinet.net.au  Mon Sep 17 06:52:14 2007
From: r-w at iinet.net.au (Ross Wilson)
Date: Mon, 17 Sep 2007 20:52:14 +1000
Subject: generating list of sub lists
In-Reply-To: <1189931217.415065.102820@w3g2000hsg.googlegroups.com>
References: <1189931217.415065.102820@w3g2000hsg.googlegroups.com>
Message-ID: <46ee5c5e$0$32487$5a62ac22@per-qv1-newsreader-01.iinet.net.au>

cesco wrote:
> Hi,
> 
> is there a one-liner to accomplish the following task?
>>From the list
> l = ['string1', 'string2', 'string3']
> generate the list of lists
> l = [['string1'], ['string1', 'string2'], ['string1', 'string2',
> 'string3']]
> 
> Any help would be appreciated.
> 
> Thanks
> Francesco
> 

l = [l, l]

Ross


From Shawn at Milochik.com  Wed Sep 19 13:13:24 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Wed, 19 Sep 2007 13:13:24 -0400
Subject: [Tutor] Finding prime numbers
In-Reply-To: <1190219929.7991.28.camel@apprentice-laptop>
References: <1190218927.7991.25.camel@apprentice-laptop>
	<82b4f5810709190931u16ee0621xc6608d2bcb2fec5e@mail.gmail.com>
	<1190219929.7991.28.camel@apprentice-laptop>
Message-ID: <2dc0c81b0709191013k181d1a74m76a08cecadb005c4@mail.gmail.com>

Here's my attempt:

#!/usr/bin/env python

import math

for x in range(3,1000,2):

    isPrime = True

    for y in range(3,(math.sqrt(x) + 1)):
        if x % y == 0:
            isPrime = False
            break

    if isPrime:
        print "%d is prime." % x

Notes: This doesn't bother with even numbers at all, and uses the
square root function of "math."

Any improvements anyone?


From idzwan.nizam at gmail.com  Wed Sep 12 09:47:58 2007
From: idzwan.nizam at gmail.com (idzwan.nizam at gmail.com)
Date: Wed, 12 Sep 2007 06:47:58 -0700
Subject: library to launch program in linux
In-Reply-To: <13e0itfgm0ida1c@corp.supernews.com>
References: <1189103678.484278.321650@r34g2000hsd.googlegroups.com>
	<13e0itfgm0ida1c@corp.supernews.com>
Message-ID: <1189604878.304602.104410@k79g2000hse.googlegroups.com>

On Sep 7, 2:49 am, Grant Edwards <gra... at visi.com> wrote:
> On 2007-09-06, idzwan.ni... at gmail.com <idzwan.ni... at gmail.com> wrote:
>
> > I'm a new user. What library should I use so that I canlaunch
> >programin linux using python? Thank you in advance.
>
> subprocess
>
> --
> Grant Edwards                   grante             Yow! Hello, GORRY-O!!
>                                   at               I'm a GENIUS from HARVARD!!
>                                visi.com

can you please show me the sample code using subprocess library. I
would like user to have few option, program they could run. say,
firefox and x chat. thank you



From s.mientki at id.umcn.nl  Tue Sep 25 06:37:37 2007
From: s.mientki at id.umcn.nl (stef)
Date: Tue, 25 Sep 2007 12:37:37 +0200
Subject: ANN: PyPE 2.8.7
In-Reply-To: <mailman.1037.1190715307.2658.python-list@python.org>
References: <mailman.1037.1190715307.2658.python-list@python.org>
Message-ID: <f082a$46f8e4f1$83aef404$21115@news1.tudelft.nl>

Josiah Carlson wrote:
> === What is PyPE? ===
> PyPE (Python Programmers' Editor) was written in order to offer a
> lightweight but powerful editor for those who think emacs is too much
> and idle is too little. Syntax highlighting is included out of the box,
> as is multiple open documents via tabs.
>
>   
sounds very good,
so now I want to try it ...
... the windows ansi zip file is corrupted :-(
... the unicode version crashes :-(

This is what the log file tells:
Traceback (most recent call last):
  File "pype.py", line 110, in ?
  File "zipextimporter.pyc", line 78, in load_module
  File "configuration.pyc", line 149, in ?
Exception: Unable to create config directory: 'G:\\.pype'

I don't have a G-drive ;-)

cheers,
Stef Mientki


From zzbbaadd at aol.com  Tue Sep 11 07:20:10 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Tue, 11 Sep 2007 04:20:10 -0700
Subject: cpython list __str__ method for floats
In-Reply-To: <13ectngf3aeqrb0@corp.supernews.com>
References: <13ectngf3aeqrb0@corp.supernews.com>
Message-ID: <1189509610.649272.44040@g4g2000hsf.googlegroups.com>

On Sep 11, 4:07 am, "[david]" <da... at nospam.spam> wrote:
> returns poorly formatted values:
>
>  >>>str(13.3)
> '13.3'
>  >>>str([13.3])
> '[13.300000000000001]'
>
> [david]

There is some difference in the way repr() and str() convert floats to
strings:

>>> a = 13.3
>>> print str(a)
13.3
>>> print repr(a)
13.300000000000001
>>> a
13.300000000000001
>>> a.__str__()
'13.3'
>>> a.__repr__()
'13.300000000000001'
>>>



From Summercoolness at gmail.com  Sat Sep 15 08:36:02 2007
From: Summercoolness at gmail.com (Summercool)
Date: Sat, 15 Sep 2007 12:36:02 -0000
Subject: how to join array of integers?
Message-ID: <1189859762.563599.269270@g4g2000hsf.googlegroups.com>

i think in Ruby, if you have an array (or list) of integers

foo = [1, 2, 3]

you can use foo.join(",") to join them into a string "1,2,3"

in Python... is the method to use  ",".join() ?  but then it must take
a list of strings... not integers...

any fast method?



From korovev76 at gmail.com  Thu Sep 20 06:16:18 2007
From: korovev76 at gmail.com (korovev76 at gmail.com)
Date: Thu, 20 Sep 2007 03:16:18 -0700
Subject: I MEANT ONIX.... [it was Re: ONYX]
In-Reply-To: <1190282489.824709.29050@r29g2000hsg.googlegroups.com>
References: <1190211769.268351.79500@d55g2000hsg.googlegroups.com>
	<46f1726f$0$15276$426a74cc@news.free.fr>
	<1190282489.824709.29050@r29g2000hsg.googlegroups.com>
Message-ID: <1190283378.175422.73290@r29g2000hsg.googlegroups.com>


i'm such a lame... i meant onix... not onyx...
http://xml.coverpages.org/onix.html

the questions remain the same ones...

thanx


On 20 Set, 12:01, korove... at gmail.com wrote:
> On 19 Set, 21:02, Bruno Desthuilliers
>
> <bdesth.quelquech... at free.quelquepart.fr> wrote:
>
> > I don't know what's "onyx-style" xml,
>
> i'm not used to xml, so for meonyxis just a mess...http://www.onyx.com/Products/xml.asp
>
> > but if it's xml, any xml parser
> > will parse it, and any validating parser should be able to validate it
> > given the correct DTD.
>
> For example?where do I find a good validating parser?
>
> thanx again





From bryanjugglercryptographer at yahoo.com  Mon Sep 17 16:29:27 2007
From: bryanjugglercryptographer at yahoo.com (bryanjugglercryptographer at yahoo.com)
Date: Mon, 17 Sep 2007 13:29:27 -0700
Subject: Saving parameters between Python applications?
In-Reply-To: <fcm036$cp8$1@news2.u-psud.fr>
References: <1189969538.830532.98840@g4g2000hsf.googlegroups.com>
	<fcm036$cp8$1@news2.u-psud.fr>
Message-ID: <1190060967.696332.113190@n39g2000hsh.googlegroups.com>

On Sep 17, 6:39 am, Laurent Pointal
> May use simple file in known place:
> $HOME/.myprefs
> $HOME/.conf/myprefs
>
> Or host specific configuration API:
> WindowsRegistry HKEY_CURRENT_USER\Software\MySociety\MyApp\myprefs
>
> See os.getenv, and _winreg Windows specific module.
> See also standard ConfigParser module


Also, os.path offers expanduser(). The following is reasonably
portable:

    import os

    user_home_dir = os.path.expanduser("~")


--
--Bryan



From jstroud at mbi.ucla.edu  Sun Sep 16 21:04:58 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 16 Sep 2007 18:04:58 -0700
Subject: adding a static class to another class
In-Reply-To: <mailman.629.1189984482.2658.python-list@python.org>
References: <mailman.629.1189984482.2658.python-list@python.org>
Message-ID: <fckjfd$u7c$1@daisy.noc.ucla.edu>

Nathan Harmston wrote:
> HI,
> 
> I m trying to start an api in a similar way to the djangic way of
> Class.objects.all(). Ie objects is a "Manager" class.
> 
> So:
> 
> class Foo(object):
>    def __init__(self):
>         self.test = "NEE"
> 
> class Manager(object):
>     def __init__(self):
>         pass
>    def all(self):
>        return "COCONUTS"
> 
> Because of how some of the code is set up I cant use
> metaclasses........so I try to use a decorator:
> 
> def addto(instance):
>     def decorator(f):
>         import new
>         f = new.instancemethod(f, instance, instance.__class__)
>         setattr(instance, "objects", f)
>         return f
>     return decorator
> 
> class Manager(object):
>     @addto(Foo)
>     def __init__(self):
>        .............
> 
> however this only binds the init method to the Foo.objects, so not
> what I want. If I try using classmethod...then it just says the
> Foo.objects doesnt exist.
> 
> Does anyone have any ideas how I can accomplish this using decorators?
> And also preventing more than one Manager instance instantiated at one
> time.
> 
> Many Thanks in advance,
> 
> Nathan

What you are trying to do is a little obscure to me, but I think you 
want want to rebind Foo.objects to a new manager every time you 
instantiate a Manager? This will do it:

class Foo(object):
    def __init__(self):
         self.test = "NEE"

class Manager(object):
     def __init__(self):
         pass
     def all(self):
        return "COCONUTS"

def addto(cls):
     def decorator(f):
       def _f(self, *args, **kwargs):
         cls.objects = self
         f(self, *args, **kwargs)
       return _f
     return decorator

class Manager(object):
     @addto(Foo)
     def __init__(self):
       pass

Example:

py> class Foo(object):
...    def __init__(self):
...         self.test = "NEE"
...
py> class Manager(object):
...     def __init__(self):
...         pass
...     def all(self):
...        return "COCONUTS"
...
py> def addto(cls):
...     def decorator(f):
...       def _f(self, *args, **kwargs):
...         cls.objects = self
...         f(self, *args, **kwargs)
...       return _f
...     return decorator
...
py> class Manager(object):
...     @addto(Foo)
...     def __init__(self):
...       pass
...
py> hasattr(Foo, 'objects')
False
py> m = Manager()
py> print m
<__main__.Manager object at 0x121b870>
py> print Foo.objects
<__main__.Manager object at 0x121b870>
py> n = Manager()
py> print n
<__main__.Manager object at 0x121b250>
py> print Foo.objects
<__main__.Manager object at 0x121b250>


If you just want the class Foo to have the class Manager as its objects, 
just do this:

   Foo.objects = Manager

But I don't think that's what you want.

I'm not familiar with django, so if I haven't hit it, please elaborate.

James



From bdesth.quelquechose at free.quelquepart.fr  Thu Sep 13 15:39:34 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 13 Sep 2007 21:39:34 +0200
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <46e98e01$0$30383$9b4e6d93@newsspool4.arcor-online.net>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189604018.520338.162520@57g2000hsv.googlegroups.com>
	<mailman.486.1189693844.2658.python-list@python.org>
	<13eim00ha4lf356@corp.supernews.com>
	<Xns99AA68B097778OKB@199.45.49.11>
	<5ktfb5F5ctrvU1@mid.individual.net>
	<46e98e01$0$30383$9b4e6d93@newsspool4.arcor-online.net>
Message-ID: <46e9921e$0$26251$426a74cc@news.free.fr>

Wildemar Wildenburger a ?crit :
> Bjoern Schliessmann wrote:
> 
>>> No, but the point being made is that it would be better IN
>>> THIS CASE.
>>
>>
>> It wouldn't. IMHO, rewriting the code to two or three lines would be
>> better.
>>
> 
> Well I think Charles' Point about making the equations look like the 
> ones in the paper(s) is a pretty good one. That is a special case in 
> that the code becomes clearer when it conformes to the standards of the 
> domain it is referring to; it is not meant to be understood by itself 
> but rather in conjunction with documents that motivate it.
> 
> Or in short: Breaking it into n>1 lines would make it more readable but 
> would break the connection with the form given in the papers. (Yes, of 
> course you can refer to the eq. in a comment but believe me: if you're 
> used to seeing a certain (form of) equation, your mind will trip over 
> any variation. That is best avoided.)

OTHO, simple math-illeterate programmers like me will have hard time 
maintaining such a code. Also and FWIW, it's not always possible to make 
a direct translation of a mathematic formula|algorithm in Python, and 
even when it is, it's not always the best thing to do wrt/ perfs (I 
recently had such a case, and after a pythonic rewrite the code was 
about 75% shorter, 50% faster, and 200% more readable for average joe 
programmer).

> ... my 2 sents, anyway ...

May I add my 2 cents - or should I send them  ?-)



From david at asdf.asdf  Thu Sep  6 22:03:26 2007
From: david at asdf.asdf (bambam)
Date: Fri, 7 Sep 2007 12:03:26 +1000
Subject: concise code (beginner)
References: <13dsvqrqivtf092@corp.supernews.com><13dv4uqqb806ff0@corp.supernews.com>
	<13dvvgk96amhhec@corp.supernews.com>
Message-ID: <13e1cbetihma1d6@corp.supernews.com>

Hi Steven.

Looking at your code, why are you naming the value
__all__? It looks like a built-in variable?

Unless there is an automatic way to correctly get the
function list, I will probably be better off giving the lines
sequence numbers, and generating the function list from
that.

Steve.

"Steven D'Aprano" <steve at REMOVE-THIS-cybersource.com.au> wrote in message 
news:13dvvgk96amhhec at corp.supernews.com...
> On Thu, 06 Sep 2007 15:44:57 +1000,
> "bambam" <david at asdf.asdf> wrote in message
> news:13dsvqrqivtf092 at corp.supernews.com...

>
> Try something like this: define a module holding the device functions.
>
> # module script
>
> __all__ = [a0010, a002, a0030, a0040, a0050]
>
...
# module test1
 import script
class Test1(pl_test.Pl_test)
"""ADC calibration and Battery Voltage calibration"""
    def run(self,devlist):
         for line in script.__all__:
             for self.dev in devlist
                 if self.dev.active and not self.dev.failed
                 try
                     line(self)
                 except Exception,e:
                     print e
                     self.dev.active=False

         print "The following devices passed:"
         for dev in devlist
             if dev.active and not dev.failed
                 print dev

         print "The following devices need to be re-tested"
         for dev in devlist
             if not dev.active
                 print dev

         print "The remaining devices failed"
         for dev in delist
             if dev.active and dev.failed
                 print dev

> -- 
> Steven.
> 




From bj_666 at gmx.net  Wed Sep 19 02:34:18 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 19 Sep 2007 06:34:18 GMT
Subject: Deserializing specific objects from a file
References: <1190156558.313252.31000@y27g2000pre.googlegroups.com>
Message-ID: <5lbu7aF78tegU1@mid.uni-berlin.de>

On Tue, 18 Sep 2007 16:02:38 -0700, Aaron J. M. wrote:

> There are many objects that I want be able to move in and out of
> memory at runtime; namely the game levels.  I only want one level in
> memory at a time, so I want to be able to unpickle specific Level
> objects as the player moves between levels.  I would prefer my
> serialized objects to reside in one file.
> 
> I haven't come across references that say how to do something like
> what I'm describing.  Does anyone here know what techniques I have to
> employ here?

Take a look at the `shelve`-Module.  Another option might be pickling to
individual files and store them in a ZIP archive.

Ciao,
	Marc 'BlackJack' Rintsch


From akhavr at kds.com.ua  Sat Sep 22 10:25:32 2007
From: akhavr at kds.com.ua (Andrey Khavryuchenko)
Date: Sat, 22 Sep 2007 17:25:32 +0300
Subject: Who can develop the following Python script into working
	application ?
References: <1190334828.210230.293980@50g2000hsm.googlegroups.com>
	<1190372423.768184.60080@19g2000hsx.googlegroups.com>
	<5lho31F84jgjU1@mid.uni-berlin.de>
	<1190419744.390216.19040@w3g2000hsg.googlegroups.com>
	<5lk9e0F8leeeU1@mid.uni-berlin.de>
Message-ID: <m37imig4kj.fsf@netmaster.kds.com.ua>


 DBR> And as you said yourself:

 DBR> """
 DBR> Frankly speaking I would prefer to pay for your kind assistance
 DBR> as it may take me to much time to learn some Python and understand the
 DBR> following script.
 DBR> """

 DBR> Now, again: http://www.guru.com/ There you can get devlopers for
 DBR> money. So what again is your problem?

Actually, I am a python (and django) developer, looking for a contract,
owning Nokia 770 and contacted original poster with no response.

-- 
Andrey V Khavryuchenko       http://a.khavr.com/    
Chytach - unflood your feeds http://www.chytach.com/
Software Development Company http://www.kds.com.ua/


From ladaan at iptel.org  Wed Sep 26 18:14:49 2007
From: ladaan at iptel.org (Ladislav Andel)
Date: Thu, 27 Sep 2007 00:14:49 +0200
Subject: ~ bit-wise unary operator
Message-ID: <46FAD9D9.1000503@iptel.org>

Hello,
why ~ bit-wise unary operator returns -(x+1) and not bit inversion of 
the given integer?

example:
a = 7978
a = ~a
python returns -7979

but I need to get back 57557 as in C language.

which is also in binary
0001111100101010
and inverted
1110000011010101

Is here any other operator or do I have to write it on my own?

Thank you,
Lada


From meesters at uni-mainz.de  Tue Sep 25 04:19:19 2007
From: meesters at uni-mainz.de (Christian Meesters)
Date: Tue, 25 Sep 2007 10:19:19 +0200
Subject: strange behavious of the logging module?
References: <fd6n9i$8hc$1@news1.zdv.uni-mainz.de>
	<fd7nf6$g14$02$1@news.t-online.com>
	<1190643051.084144.230220@o80g2000hse.googlegroups.com>
	<fd8l4n$9o1$03$1@news.t-online.com>
	<1190672978.233964.232900@g4g2000hsf.googlegroups.com>
	<fdaepi$k6m$00$1@news.t-online.com>
Message-ID: <fdaga7$e7j$1@news1.zdv.uni-mainz.de>

Peter Otten wrote:

> Vinay Sajip wrote:
> 
>> This is a known bug, and not specifically related to logging, though
>> it sometimes manifests itself via logging:
>> 
>> http://bugs.python.org/issue1180193
> 
> Yup, thanks for looking into it.
> 
> Peter
Thanks Vinay, but I am curious how issue 1180193 is related to the "bug"
Peter and me described: I do not have any *.pyc file around. As I kept
changing the file during development I used to call the program directly
using a link in my PATH. Hence no *.pyc file got created at all. 

However, does anybody know a suggestion for a work-around?

Christian


From wizzardx at gmail.com  Thu Sep 20 17:44:27 2007
From: wizzardx at gmail.com (David)
Date: Thu, 20 Sep 2007 23:44:27 +0200
Subject: re question
In-Reply-To: <d6944c490709190517t390086d4m915b77b1cef5055a@mail.gmail.com>
References: <d6944c490709190517t390086d4m915b77b1cef5055a@mail.gmail.com>
Message-ID: <18c1e6480709201444w5820f86flfa77c103d76570c7@mail.gmail.com>

On 9/19/07, Dan Bar Dov <bardov at gmail.com> wrote:
> I'm trying to construct a regular expression to match valid IP address,
> without leading zeroes (i.e
> 1.2.3.4, 254.10.0.0, but not 324.1.1.1, nor 010.10.10.1)
>
> This is what I come up with, and it does not work.
>
> r'(^[12]?\d{0,2}\.){3,3}[12]?\d{0,2}'
>
> What am I doing wrong?
> Any common knowledge IP matching RE?

http://www.regular-expressions.info/examples.html ?


From steve at holdenweb.com  Fri Sep 28 13:57:57 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 28 Sep 2007 13:57:57 -0400
Subject: Python 3.0 migration plans?
In-Reply-To: <1191000394.828693.285210@k79g2000hse.googlegroups.com>
References: <mailman.1195.1190936289.2658.python-list@python.org>	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>	<87641v4j38.fsf@benfinney.id.au>	<1190949502.875203.57690@w3g2000hsg.googlegroups.com>	<5m3p1dFbl98pU1@mid.uni-berlin.de>	<1190968707.799398.232550@19g2000hsx.googlegroups.com>	<5m4126FbgjabU1@mid.uni-berlin.de>	<1190993122.979034.305060@50g2000hsm.googlegroups.com>	<mailman.1236.1190995515.2658.python-list@python.org>	<1190997769.002795.59450@57g2000hsv.googlegroups.com>	<5m4qc2Fbbk19U1@mid.uni-berlin.de>
	<1191000394.828693.285210@k79g2000hse.googlegroups.com>
Message-ID: <46FD40A5.8030504@holdenweb.com>

TheFlyingDutchman wrote:
> On Sep 28, 10:01 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>> On Fri, 28 Sep 2007 09:42:49 -0700, TheFlyingDutchman wrote:
>>> Which of the common languages have higher order functions and what is
>>> the syntax?
>> C, C++, Pascal, Perl, PHP, Ruby have them.  And of course the functional
>> languages, most notably Lisp and Scheme as you asked for common languages.
>>
>> Don't know if C#'s delegates qualify.
>>
>> Ciao,
>>         Marc 'BlackJack' Rintsch
> 
> What is the syntax of a higher order function in C, C++ and Pascal?
> 
This is like listening to a four-year-old torment its parents with 
incessant questions. Do you *have* to ask every question that pops into 
your mind?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From jcarlson at uci.edu  Tue Sep 25 06:20:21 2007
From: jcarlson at uci.edu (Josiah Carlson)
Date: Tue, 25 Sep 2007 03:20:21 -0700
Subject: ANN: PyPE 2.8.7
Message-ID: <20070925031950.8542.JCARLSON@uci.edu>


=== What is PyPE? ===
PyPE (Python Programmers' Editor) was written in order to offer a
lightweight but powerful editor for those who think emacs is too much
and idle is too little. Syntax highlighting is included out of the box,
as is multiple open documents via tabs.

Beyond the basic functionality, PyPE offers an expandable source tree,
filesystem browser, draggable document list, todo list, filterable
function list, find and replace bars (no dialog to find or replace simple
strings), recordable and programmable macros, spell checker,
reconfigurable menu hotkeys, triggers, find in files, external process
shells, and much more.

=== More Information ===

If you would like more information about PyPE, including screenshots,
where to download the source or windows binaries, bug tracker, contact
information, or a somewhat complete listing of PyPE's features, visit
PyPE's home on the web:

    http://pype.sf.net/index.shtml

If you have any questions about PyPE, please contact me, Josiah Carlson,
aka the author of PyPE, at jcarlson at uci.edu (remember to include
"PyPE" in the subject).


PyPE 2.8.7 includes the following changes and bugfixes since release
2.8.5:

#-------------------------------- PyPE 2.8.7 ---------------------------------
(fixed) some bugs related to the parsers module movement.
(fixed) ordering of user profile path discovery to not break when confronted
with insane 'HOME' environment variable on Windows (will use USERPROFILE or
HOMEDRIVE/HOMEPATH first).
(fixed) unrepr mechansim can now handle negative value storage for disabled
realtime options, etc.


#-------------------------------- PyPE 2.8.6 ---------------------------------
(fixed) a bug with "Wrap Try/Except" as per emailed bug report from Ian York.
(added) ability to choose what port PyPE will listen on via --port= .
(fixed) workspaces in wxPython 2.8+, patch thanks to Craig Mahaney.
(added) explicit exclude dirs for find in files, patch thanks to Craig
Mahaney.
(added) paste and down mechanism to paste and move the cursor down, patch
thanks to Craig Mahaney.
(added) delete right mechanism to delete everything from the cursor to the end
of the line, patch thanks to Craig Mahaney.
(added) delete line mechanism to delete the current line, patch thanks to
Craig Mahaney.
(added) paste rectangle command for rectangular pasting, patch thanks to Craig
Mahaney.
(fixed) support for alternate background colors thanks to bug report from
Craig Mahaney.
(added) macro support to Craig Mahaney's added functionality.
(added) implementation for regular expression replacements, possibly to be
integrated as part of a 'replace in all open documents' in the future.
(added) automatic spellcheck for text and tex documents of up to 200,000 byes
in size.  Will only spellcheck if the user has enabled "check syntax" in the
"Realtime Options".
(fixed) issue when trying to save language settings when cursor position is
not to be saved.
(added) support for \chapter section delimiter in *tex files.
(fixed) issue that prevented the highest level source listing from being
sorted in the Name and Line sorted source trees.
(changed) rather than reading and executing a file for configuration loading,
we now use a variant of the 'unrepr()' mechanism with support for True/False.
(changed) find/replace bar now uses variant of 'unrepr()' rather than the
compiler module directly.
(changed) moved parsers.py to plugins and stopped using import * to get its
contents.


From christophertidy at hotmail.com  Mon Sep  3 12:13:28 2007
From: christophertidy at hotmail.com (christophertidy at hotmail.com)
Date: Mon, 03 Sep 2007 16:13:28 -0000
Subject: TypeError: 'module object is not callable'
In-Reply-To: <5k2cjmF1r2aiU1@mid.uni-berlin.de>
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<mailman.315.1188810174.28954.python-list@python.org>
	<46dbd11e$0$6228$426a74cc@news.free.fr>
	<mailman.317.1188812089.28954.python-list@python.org>
	<1188816626.021956.281040@22g2000hsm.googlegroups.com>
	<5k2cjmF1r2aiU1@mid.uni-berlin.de>
Message-ID: <1188836008.656284.76160@o80g2000hse.googlegroups.com>


>
> The others spottet the error I missed. But I can offer something else:
>
> http://dirtsimple.org/2004/12/python-is-not-java.html
>
> It's a worthy read for someone coming from Java, needing time to adjust.
>
> Diez- Hide quoted text -
>
> - Show quoted text -

That deffinately was a useful read, thanks.
Thankyou to everyone who sorted these problems for me, I have
progressed very well
with this python program throughout the day now.

I have another little question before I finish today:
I am currently struggling to use a global variable in my static
functions. I'll explain further

Within my main.py file I have

class Main(object):
    stepStore = StepStore()

    @staticmethod
    def createDepSteps():
        ....
        stepStore.addStep([bol7, pre5])
        .......

    @staticmethod
    def processSteps():
        for step in stepStore.stepList[:]:
        ......

Main.createDepSteps()
Main.processSteps()


Trying this approach I am getting a error saying with the
processSteps() method, stepStore is undefined
To solve this problem I am currently passing in the processSteps()
parameter a stepStore instance created within createDepSteps()
but there is surely a way stepStore can be a global attribute which
can be accessed from both methods?
Any help would be much appreciated again
Cheers
Chris



From ricaraoz at gmail.com  Sat Sep  1 08:51:26 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Sat, 01 Sep 2007 09:51:26 -0300
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <026201c7ec75$07d6e0c0$03000080@hendrik>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com><-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com><1188364909.397692.209170@q4g2000prc.googlegroups.com><1188367108.393207.241970@g4g2000hsf.googlegroups.com><1188369928.755777.142690@i38g2000prf.googlegroups.com><46d75191$0$401$426a74cc@news.free.fr><1188518054.298017.90610@x35g2000prf.googlegroups.com><46d76595$0$4013$426a74cc@news.free.fr><1188523589.736146.263510@l22g2000prc.googlegroups.com><1i3o9kr.2gmni61g62moaN%aleax@mac.com><7xwsvcc9yz.fsf@ruckus.brouhaha.com><1i3p8lm.19738kn1q0gkouN%aleax@mac.com><1188587846.687895.69240@q5g2000prf.googlegroups.com><38rmq4-cq.ln1@strongwill.g2ctech>	<46d903db$0$19580$4c368faf@roadrunner.com>
	<026201c7ec75$07d6e0c0$03000080@hendrik>
Message-ID: <46D9604E.6060708@bigfoot.com>

Hendrik van Rooyen wrote:
>  "Carl Banks" <pavl....mail.com> wrote:
> 
>> This is starting to sound silly, people.  Critical is a relative term, 
>> and one project's critical may be anothers mundane.  Sure a flaw in your 
>> flagship product is a critical problem *for your company*, but are you 
>> really trying to say that the criticalness of a bad web search is even 
>> comparable to the most important systems on airplanes, nuclear reactors, 
>> dams, and so on?  Come on.
> 
> This really intrigues me - how do you program a dam?  - and why is it
> critical?
> 
> Most dams just hold water back.
> 
> Dam design software - well yes that I would agree is critical.
> Is that what you mean?
> 
> - Hendrik
> 

Yup! He was referring to that Damn design software. Just as almost
everyone has at one time or another.  ;c)


From pavlovevidence at gmail.com  Sat Sep 29 02:19:37 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sat, 29 Sep 2007 02:19:37 -0400
Subject: Python 3.0 migration plans?
References: <mailman.1213.1190971515.2658.python-list@python.org>
	<mailman.1224.1190987126.2658.python-list@python.org>
Message-ID: <46fdfbf2$0$24308$4c368faf@roadrunner.com>

On Fri, 28 Sep 2007 09:56:48 -0400, Stephan Deibel wrote:
> Ian Dickinson wrote:
>> Never would look like a good time scale to me given that a lot of the
>> stuff I use is being ripped out!!!!
> 
> Has any one actually converted any real code or significant bits of code
> using the 3.0 converter (in the sandbox somewhere), and if so what kinds
> of things actually failed?

Well, since the converter is designed to convert 2.6 and above, and since 
there isn't much Python 2.6 code out there yet, I'd say nothing 
significant.  :)

Anyways, it is not designed to convert arbitrary code that's lying 
around: it's designed to convert a supported subset of Python 2.6+ into 
Python 3.0.  You'd have to write "transitional Python" to use the tool.



Carl Banks


From cmr.Pent at gmail.com  Wed Sep 12 05:10:09 2007
From: cmr.Pent at gmail.com (cmr.Pent at gmail.com)
Date: Wed, 12 Sep 2007 02:10:09 -0700
Subject: need scsh in a wikip article
In-Reply-To: <1189568488.932657.129510@o80g2000hse.googlegroups.com>
References: <1189563310.268611.4550@r34g2000hsd.googlegroups.com>
	<1189568488.932657.129510@o80g2000hse.googlegroups.com>
Message-ID: <1189588209.836060.46920@50g2000hsm.googlegroups.com>

> someone please add scsh there.

Why can't YOU add scsh or I am missing something??

Andrey



From http  Thu Sep 27 05:24:33 2007
From: http (Paul Rubin)
Date: 27 Sep 2007 02:24:33 -0700
Subject: sorteddict PEP proposal [started off as orderedict]
References: <1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>
	<1190753722.026806.254530@d55g2000hsg.googlegroups.com>
	<1190756003.292096.71130@o80g2000hse.googlegroups.com>
	<1190789981.385466.37870@57g2000hsv.googlegroups.com>
	<Xns99B760A3F5859duncanbooth@127.0.0.1>
	<1190805297.182232.116830@50g2000hsm.googlegroups.com>
	<Xns99B7957CCE43Fduncanbooth@127.0.0.1>
	<1190815180.945099.248670@n39g2000hsh.googlegroups.com>
	<1190816657.574437.80980@g4g2000hsf.googlegroups.com>
	<1190820026.299569.110250@n39g2000hsh.googlegroups.com>
	<Xns99B7DE66C56F6duncanbooth@127.0.0.1>
	<1190846656.770087.173230@19g2000hsx.googlegroups.com>
	<Xns99B85636C2565duncanbooth@127.0.0.1>
	<1190880801.795820.275070@50g2000hsm.googlegroups.com>
	<Xns99B867388AFCAduncanbooth@127.0.0.1>
Message-ID: <7xzlz8ea0e.fsf@ruckus.brouhaha.com>

Duncan Booth <duncan.booth at invalid.invalid> writes:
> Ok, your choice, just be aware that by using such a restrictive license you 
> will dissuade a lot of people from using your code. You've prevented your 
> module being used in any existing projects with Python license, GPL v2, or 
> probably any license other than GPL v3.

GPL2 projects seem to be migrating nicely to GPL3 so GPL2 shouldn't be
too much of a problem.  

Since one of the Python license's goals is to allow re-use in
proprietary programs, and the GPL family's main goal is the exact
opposite, I'd say if someone chooses a GPL, then preventing the code
from being used in a Python-licensed project was part of the intention
and not an undesired consequence.  While Python itself is unlikely to
switch to a new license in order to import GPL code, other projects
can and have done exactly that.


From jcd at sdf.lonestar.org  Fri Sep 21 15:29:50 2007
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Fri, 21 Sep 2007 15:29:50 -0400
Subject: RE Help
In-Reply-To: <1190401551.706792.178450@22g2000hsm.googlegroups.com>
References: <1190399985.324448.242610@d55g2000hsg.googlegroups.com>
	<mailman.884.1190400295.2658.python-list@python.org>
	<1190401551.706792.178450@22g2000hsm.googlegroups.com>
Message-ID: <20070921192950.GB12479@sdf.lonestar.org>

On Fri, Sep 21, 2007 at 12:05:51PM -0700, chris.monsanto at gmail.com wrote regarding Re: RE Help:
> 
> >
> > x = re.compile('START(.*)END', re.DOTALL)
> 
> You'll want to use a non-greedy match:
> 
> x = re.compile(r"START(.*?)END", re.DOTALL)
> 
> Otherwise the . will match END as well.

The . will only consume END if there is another END to match later on in the string.  And then it's a question of desired fuctionality.  If the given string is: "abcdSTARTefgENDxyzENDhijk" do you want to match "STARTefgEND" (in which case you need a non-greedy match r".*?" )? or do you want to match "STARTefgENDxyzEND" (in which case you need a greedy match: r".*" )?

Cheers,
Cliff


From piyushj at cse.iitk.ac.in  Thu Sep 27 09:07:09 2007
From: piyushj at cse.iitk.ac.in (Piyush Jain)
Date: Thu, 27 Sep 2007 18:37:09 +0530
Subject: making run time changes..
Message-ID: <000001c80107$4f9ff120$eedfd360$@iitk.ac.in>

Hi,

I am new(almost) to python. I wish to making a server in which I can make
changes at run time. For example , add a method to a class/attribute to
object etc. by sending it messages. 

Can anyone help me with what features to look into and how to go about it.
Are there any similar projects?

 

Regards,

Piyush

 

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From ldo at geek-central.gen.new_zealand  Tue Sep 25 22:19:00 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Wed, 26 Sep 2007 14:19:00 +1200
Subject: Script to extract text from PDF files
References: <fdbh95$smc$1@solaris.cc.vt.edu>
	<1190746968.162359.39890@r29g2000hsg.googlegroups.com>
	<1190747931.415834.75670@n39g2000hsh.googlegroups.com>
Message-ID: <fdcfik$brq$2@lust.ihug.co.nz>

In message <1190747931.415834.75670 at n39g2000hsh.googlegroups.com>, 
byte8bits at gmail.com wrote:

> On Sep 25, 3:02 pm, Paul Hankin <paul.han... at gmail.com> wrote:
>
>> Googling for 'pdf to text python' and following the first link
>> giveshttp://pybrary.net/pyPdf/
> 
> Doesn't work that well...

This is inherent in the nature of PDF: it's a page-description language, not
a document-interchange language. Each text-drawing command can put a block
of text anywhere on the page, so you have no idea, just from parsing the
PDF content, how to join these blocks up into lines, paragraphs, columns
etc.


From carsten at uniqsys.com  Mon Sep 24 07:39:11 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 24 Sep 2007 07:39:11 -0400
Subject: sorting a list numbers stored as strings
In-Reply-To: <1360b7230709240423k47485263pedc6562000ba1597@mail.gmail.com>
References: <1190632366.863711.100680@y42g2000hsy.googlegroups.com>
	<1360b7230709240423k47485263pedc6562000ba1597@mail.gmail.com>
Message-ID: <1190633951.3385.23.camel@dot.uniqsys.com>

On Mon, 2007-09-24 at 16:53 +0530, Amit Khemka wrote:
> On 9/24/07, aine_canby at yahoo.com <aine_canby at yahoo.com> wrote:
> > hi,
> >
> > I have the following list -
> >
> > ["1", "11", "2", "22"]
> >
> > how do I sort it like this -
> >
> > ["1", "2", "11", "22"]
> >
> 
> Hi,
> 
> >>> l = ["1", "11", "2", "22"]
> >>> sorted(l, cmp = lambda x, y: cmp(int(x), int(y)))  # provide your
> own compare function !
> >>> l
> ['1', '2', '11', '22']

That interpreter session is a work of fiction, since sorted returns the
sorted list instead of sorting the list in place. Also, it's better
(i.e. more readable and likely faster) to use a sort key function
instead of a comparison function whenever possible. In this case, the
sort key function is particularly trivial:

>>> l = ["1", "11", "2", "22"]
>>> sorted(l, key=int)
['1', '2', '11', '22']

-- 
Carsten Haese
http://informixdb.sourceforge.net




From zzbbaadd at aol.com  Thu Sep 20 02:17:36 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Wed, 19 Sep 2007 23:17:36 -0700
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
In-Reply-To: <mailman.786.1190246955.2658.python-list@python.org>
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<fcq352$u0a$1@sea.gmane.org>
	<mailman.786.1190246955.2658.python-list@python.org>
Message-ID: <1190269056.975115.217050@22g2000hsm.googlegroups.com>

2

On Sep 19, 5:08 pm, "Terry Reedy" <tjre... at udel.edu> wrote:
> "Terry Reedy" <tjre... at udel.edu> wrote in message
>

>
> This assumes that comparing versions of 1.5 is still relevant.  As far as I
> know, his patch has not been maintained to apply against current Python.
> This tells me that no one to date really wants to dump the GIL at the cost
> of half Python's speed.  Of course not.  The point of dumping the GIL is to
> use multiprocessors to get more speed!  So with two cores and extra
> overhead, Stein-patched 1.5 would not even break even.

Is the only point in getting rid of the GIL to allow multi-threaded
applications?

Can't multiple threads also provide a performance boost versus
multiple processes on a single-core machine?

>
> So now this question for you:  "CPython 2.5 runs too slow in 2007: true or
> false?"

Ugh, I guess I have to agree with Steven D'Aprano - it depends.

>
> If you answer false, then there is no need for GIL removal.

OK, I can see that.

> If you answer true, then cutting its speed for 90+% of people is bad.

OK, have to agree. Sounds like it could be a good candidate for a
fork. One question - is it a computer science maxim that an
interpreter that implements multi-threading will always be slower when
running single threaded apps?

>
> And another question: why should such people spend time they do not have to
> make Python worse for themselves?

I can't make an argument for someone doing something for free that
they don't have the time for. Ditto for doing something for free that
they don't want to do. But it does seem that if they give a reason for
why it's the wrong thing to do, it's fair to make a counter-argument.
Although I agree with Steven D'Aprano's theme in that it should be a
cordial rebuttal and not a demand.




From sjmachin at lexicon.net  Sat Sep 15 08:51:20 2007
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 15 Sep 2007 05:51:20 -0700
Subject: how to join array of integers?
In-Reply-To: <1189859762.563599.269270@g4g2000hsf.googlegroups.com>
References: <1189859762.563599.269270@g4g2000hsf.googlegroups.com>
Message-ID: <1189860680.729191.13290@g4g2000hsf.googlegroups.com>

On Sep 15, 10:36 pm, Summercool <Summercooln... at gmail.com> wrote:
> i think in Ruby, if you have an array (or list) of integers
>
> foo = [1, 2, 3]
>
> you can use foo.join(",") to join them into a string "1,2,3"
>
> in Python... is the method to use  ",".join() ?  but then it must take
> a list of strings... not integers...
>
> any fast method?

>>> foo = [1,2,3]
>>> ",".join(str(x) for x in foo)
'1,2,3'
>>> ",".join(map(str, foo))
'1,2,3'
>>>

If you are going to write several such results to a file, consider
using the csv module.

HTH,
John



From bkline at rksystems.com  Sun Sep 16 01:47:36 2007
From: bkline at rksystems.com (Bob Kline)
Date: Sun, 16 Sep 2007 01:47:36 -0400
Subject: Un(der)documented bits of cgi.py
Message-ID: <mLadnSK4GYnlXnHbnZ2dnUVZ_q2hnZ2d@speakeasy.net>

I'm trying to detect and intelligently deal with problems created when a 
user of a Python CGI page uploads a file and then gets impatient and 
clicks on some other button or the browser's cancel button (or even 
closes the page).  If the file is large enough, and the user is 
impatient enough, this can result in the FieldStorage.file object 
getting some, but not all of the bytes from the user's file, with no 
documented means of detecting that this has happened.  Poking around in 
the code for cgi.py in the standard library, it appears that there is an 
undocumented 'done' attribute which might be useful here (it seems as if 
it might get set to -1 when this condition is encountered), but of 
course one is reluctant to leave behind software which relies on 
undocumented behavior of packages, since those bits have a way of 
disappearing in the middle of the night, suddenly breaking one's 
software.  Can anyone think of a good reason why it would not be 
desirable to expose a publicly documented means of detecting the 
condition described above?

Cheers and thanks!
Bob Kline


From kyosohma at gmail.com  Tue Sep 18 15:36:52 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Tue, 18 Sep 2007 19:36:52 -0000
Subject: Tutorial or Example (or Tutorial) of Using Canvas to Produce a
	Plot
In-Reply-To: <WPTHi.5906$FO2.4148@newssvr14.news.prodigy.net>
References: <phRHi.50851$Um6.35199@newssvr12.news.prodigy.net>
	<13evohih7rkd030@corp.supernews.com>
	<WPTHi.5906$FO2.4148@newssvr14.news.prodigy.net>
Message-ID: <1190144212.073532.95830@d55g2000hsg.googlegroups.com>

On Sep 18, 12:23 pm, "W. Watson" <wolf_tra... at invalid.com> wrote:
> What would be appropriate? What are the choices? I'm pretty new to Python,
> but am familiar with the XWindow widget set. I think it is available under
> Python, but if there's a more suitable choice, that's fine. I would think
> Tkinter would be the simplest choice. Yes, Tkinter would be preferable. It
> seems to be the GUI of choice.
>
> Grant Edwards wrote:
> > On 2007-09-18, W. Watson <wolf_tra... at invalid.com> wrote:
>
> >> I'm looking for an example with canvas that produces, say, a
> >> complete x-y plot of some data.
>
> > With what widget set?
>
> --
>                           Wayne Watson (Nevada City, CA)
>
>                         Web Page: <speckledwithStars.net>

I've heard a lot about drawing with the wxPython widget set as well.

Some examples:

http://wiki.wxpython.org/RecipesImagesAndGraphics

Mike



From m.n.summerfield at googlemail.com  Wed Sep 26 11:40:39 2007
From: m.n.summerfield at googlemail.com (Mark Summerfield)
Date: Wed, 26 Sep 2007 15:40:39 -0000
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <1190820026.299569.110250@n39g2000hsh.googlegroups.com>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>
	<1190753722.026806.254530@d55g2000hsg.googlegroups.com>
	<1190756003.292096.71130@o80g2000hse.googlegroups.com>
	<1190789981.385466.37870@57g2000hsv.googlegroups.com>
	<Xns99B760A3F5859duncanbooth@127.0.0.1>
	<1190805297.182232.116830@50g2000hsm.googlegroups.com>
	<Xns99B7957CCE43Fduncanbooth@127.0.0.1>
	<1190815180.945099.248670@n39g2000hsh.googlegroups.com>
	<1190816657.574437.80980@g4g2000hsf.googlegroups.com>
	<1190820026.299569.110250@n39g2000hsh.googlegroups.com>
Message-ID: <1190821239.051614.301070@19g2000hsx.googlegroups.com>

On 26 Sep, 16:20, Paul Hankin <paul.han... at gmail.com> wrote:
> On Sep 26, 3:24 pm, Mark Summerfield <m.n.summerfi... at googlemail.com>
> wrote:
>
> > On 26 Sep, 14:59, Paul Hankin <paul.han... at gmail.com> wrote:
>
> > > On Sep 26, 2:46 pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
>
> > > > Paul Hankin <paul.han... at gmail.com> wrote:
> > > > > More flexibly, keep a set of inserted keys that haven't yet been
> > > > > included in the sorted list, and a set of deleted keys that haven't
> > > > > yet been removed from the sorted list. The cache is invalid if either
> > > > > of these sets are empty - and to make it valid you can choose what to
> > > > > do based on the sizes of the two sets (and the sorted list). For
> > > > > instance, if there's just been one insertion you're probably better
> > > > > doing an insertion rather than a full resort. Of course, there's a few
> > > > > nasty cases here but it's always possible to just throw away the
> > > > > sorted list and reconstruct it from the dict keys when things get too
> > > > > hairy (eg, the user deletes a key that's in the inserted-but-not-yet-
> > > > > sorted set).
>
> > > > Yes that sounds good. Did you mean 'The cache is invalid if either of
> > > > these sets is not empty'?
>
> > > Yes :)
>
> > > > If you delete a key which is in the inserted set you can simply delete
> > > > it from the inserted set.
>
> > > No, in case it was already in the sorted list before the insert. You
> > > have to remove it from the inserted set AND add it to the deleted set.
>
> > > --
> > > Paul Hankin
>
> > So should Duncan's
>
> >     def __removekey(self, key):
> >         if key in self.__addkeys:
> >             del self.__addkeys[key]
> >         else:
> >             self.__delkeys.add(key)
>
> > be changed to:
>
> >     def __removekey(self, key):
> >         if key in self.__addkeys:
> >             del self.__addkeys[key]
> >         self.__delkeys.add(key)
>
> Yes, and the same in __addkey: if it's in __delkeys it should be
> removed from there, and added to __addkeys. There's an invariant: any
> key is in at most one of __addkeys and __delkeys.

OK, I have changed both:

    def __addkey(self, key):
        if key in self.__delkeys:
            del self.__delkeys[key]
        self.__addkeys.add(key)


    def __removekey(self, key):
        if key in self.__addkeys:
            del self.__addkeys[key]
        self.__delkeys.add(key)

> > (BTW I'm happy to put up a new version on PyPI, but I'm v. conscious
> > of the fact that the key ideas and code have come from you and Duncan,
> > so if either of you would like to adopt it, I will gladly step aside.
> > I just want a sorteddict in Python, and I don't mind who does it:-)
>
> Speaking for myself, I'm happy to have helped out, but you should
> carry on.

OK, I will if Duncan doesn't want it:-)

> --
> Paul Hankin




From zzbbaadd at aol.com  Mon Sep 10 02:20:11 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Sun, 09 Sep 2007 23:20:11 -0700
Subject: Python syntax wart
In-Reply-To: <fbvvil$7dj$1@lust.ihug.co.nz>
References: <fbvvil$7dj$1@lust.ihug.co.nz>
Message-ID: <1189405211.875217.176620@57g2000hsv.googlegroups.com>

It may be that a language that doesn't have a statement terminator
(which can be end-of-line) needs a statement continuation symbol.
(Excluding languages like Lisp that have parentheses everywhere).



From carsten at uniqsys.com  Thu Sep 20 08:55:15 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 20 Sep 2007 08:55:15 -0400
Subject: AIX - Python - db2.py
In-Reply-To: <6702B04331BCF8408F9FE92AFC5349B7E442@INBLRCLUMS0201.in.tesco.org>
References: <6702B04331BCF8408F9FE92AFC5349B7E442@INBLRCLUMS0201.in.tesco.org>
Message-ID: <1190292915.3392.10.camel@dot.uniqsys.com>

On Thu, 2007-09-20 at 16:05 +0530, Shilavantar, Praveen wrote:
> Hi,
>  
>     I am getting the following error while installing PyDB2 package on
> AIX machine. 
> So can anybody give me the requirements list and a procedure to
> install PyDb2 package on AIX.
>  
>  
> xn75 at ti057:/home/xn75/PyDB2-1.1.0> python setup.py install
> Your DB2 root is:
> WARNING: it seems that you did not install 'Application Development
> Kit'.
> Compilation may fail

That warning message seems to be fairly clear about the requirements.
Have you installed the DB2 Application Development Client?

-- 
Carsten Haese
http://informixdb.sourceforge.net






From jbuturff at gmail.com  Mon Sep 24 20:49:11 2007
From: jbuturff at gmail.com (Horse)
Date: Mon, 24 Sep 2007 17:49:11 -0700
Subject: shutil.copy2 error
In-Reply-To: <1190673284.509807.110830@57g2000hsv.googlegroups.com>
References: <1190644477.380312.261840@d55g2000hsg.googlegroups.com>
	<1190673284.509807.110830@57g2000hsv.googlegroups.com>
Message-ID: <1190681351.841370.100150@19g2000hsx.googlegroups.com>

On Sep 24, 6:34 pm, Karthik Gurusamy <kar1... at gmail.com> wrote:
> On Sep 24, 7:34 am, Horse <jbutu... at gmail.com> wrote:
>
>
>
> > I've written a python script that copies a nightly Oracle backup file
> > to another server.  Every couple days, the script fails with this
> > error message:
>
> > Error copying Q:/Oradata/GISPROD/Backups/3UISN35R_1_1 to s:/gisprod/
> > backups/3UISN35R_1_1
> > [Errno 22] Invalid argument
>
> > Here's the code for the function I'm running.  The path names are all
> > correct, and it works *most of the time*.  It only fails about once or
> > twice a week.  Anyone know where I can get more info on this "errno 22
> > invalid argument"?
>
> > def CopyNewFiles(SOURCE_DIR, DEST_DIR):
> >     global STATUS
> >     try:
> >         os.chdir(SOURCE_DIR)
> >         for x in os.listdir(SOURCE_DIR):
> >             int_time = os.stat(x)[stat.ST_CTIME]
> >             str_time = time.ctime(int_time)
> >             if datetime.date.fromtimestamp(int_time + 0.00) >
> > YESTERDAY:
> >                 try:
> >                     DEST_FILE = os.path.join(DEST_DIR, x)
> >                     logfile.write("     Copying " + SOURCE_DIR + x + "
> > to " + DEST_FILE + "\n")
> >                     logfile.flush()
> >                     if not os.path.isfile(DEST_FILE):
> >                         shutil.copy2(x, DEST_FILE)
>
> I'm not sure of the error; but one possibility is that the source-
> directory contents may be modified by some other process, while you
> are looping here copying one-by-one the files.
>
> So a file 'x' could be present at the time you enter loop, but gone by
> the time you try the shutil.copy2. Again this is just a guess...
>
> Yet another possibility is 'x' is not a regular file (say in unix it
> could be a named pipe).. you can try adding a check for x (like
> os.path.isfile(x)) and copy only regular files.
>
> Karthik
>

Thanks for the ideas, I will look into if there is anything else using
these files (maybe a system level backup they hadn't told me
about??).  Otherwise, these files are perfectly valid, I can go back
on the ones that error and manually copy them by hand to the
destination folder.  I should've mentioned earlier, but this is
running on a windows 2000 system, and the destination folder is a
samba share on a Linux server.



From bignose+hates-spam at benfinney.id.au  Wed Sep  5 23:08:05 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 06 Sep 2007 13:08:05 +1000
Subject: Give List to Format String - How To
References: <1189046828.313284.235210@o80g2000hse.googlegroups.com>
Message-ID: <874pi87ap6.fsf@benfinney.id.au>

"gregpinero at gmail.com" <gregpinero at gmail.com> writes:

> I might just be being dumb tonight, but why doesn't this work:

Congratulations for finding the answer quickly, and thank you for
letting us know the answer.

In future, if you want to ask "why doesn't this work", please show us
all three of: the example code, the actual behaviour, and the expected
behaviour. "Doesn't work" is not a substitute for the last two.

-- 
 \        "Most people, I think, don't even know what a rootkit is, so |
  `\  why should they care about it?"  -- Thomas Hesse, Sony BMG, 2006 |
_o__)                                                                  |
Ben Finney


From gagsl-py2 at yahoo.com.ar  Tue Sep 18 08:50:41 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 18 Sep 2007 09:50:41 -0300
Subject: super, apply, or __init__ when subclassing?
References: <1190100791.740269.62880@k79g2000hse.googlegroups.com>
Message-ID: <op.tyuomrzgx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Tue, 18 Sep 2007 04:33:11 -0300, exhuma.twn <exhuma at gmail.com> escribi?:

> This is something that keeps confusing me. If you read examples of
> code on the web, you keep on seeing these three calls (super, apply
> and __init__) to reference the super-class. This looks to me as it is
> somehow personal preference. But this would conflict with the "There
> one way to do it" mind-set.
>
> So, knowing that in python there is one thing to do something, these
> three different calls must *do* domething different. But what exactly
> *is* the difference?

There are a few typos in your examples. If you write them this way:

> ------------ Exampel 1: -----------------------------
>
> class B(A):
>    def __init__(self, *args):
>       A.__init__(self, *args)
>
> ------------ Exampel 2: -----------------------------
>
> class B(A):
>    def __init__(self, *args):
>       apply( A.__init__, (self,) + args)
>
> ------------ Exampel 3: -----------------------------
>
> class B(A):
>    def __init__(self, *args):
>       super(B,self).__init__(*args)

then 2 is exactly the same as 1 but using a deprecated function. And 3 is  
the same as 1 only when there is single inheritance involved (and you are  
using new-style classes). But see the thread "super() doesn't get  
superclass"

-- 
Gabriel Genellina



From carsten at uniqsys.com  Fri Sep  7 15:15:25 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 07 Sep 2007 15:15:25 -0400
Subject: How to convert None to null value
In-Reply-To: <13e38g6poh2jre3@corp.supernews.com>
References: <eb3f41b30709070219h1b32aacj8f6daac23cd02807@mail.gmail.com>
	<mailman.217.1189170478.2658.python-list@python.org>
	<13e38g6poh2jre3@corp.supernews.com>
Message-ID: <1189192525.3367.97.camel@dot.uniqsys.com>

On Fri, 2007-09-07 at 12:10 -0700, Dennis Lee Bieber wrote:
> On Fri, 07 Sep 2007 09:07:49 -0400, Carsten Haese <carsten at uniqsys.com>
> declaimed the following in comp.lang.python:
> 
> 
> > doesn't have a parameter binding mechanism, you should throw it away and
> > replace it with a DB-API complaint module.
> >
> 	I hadn't realized the DB-API defined a "complaint" module <G>

Yeah, I noticed the typo a minute too late. Dyslexics of the world,
untie! ;-)

-- 
Carsten Haese
http://informixdb.sourceforge.net




From zzbbaadd at aol.com  Tue Sep  4 22:14:16 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Tue, 04 Sep 2007 19:14:16 -0700
Subject: parameter list notation
In-Reply-To: <mailman.53.1188947498.2658.python-list@python.org>
References: <1188882028.165803.316540@r34g2000hsd.googlegroups.com>
	<1188882641.899594.212400@22g2000hsm.googlegroups.com>
	<13drhdial6p58ca@corp.supernews.com>
	<1188943564.291412.16000@50g2000hsm.googlegroups.com>
	<mailman.53.1188947498.2658.python-list@python.org>
Message-ID: <1188958456.208622.44640@57g2000hsv.googlegroups.com>


>
> Perhaps you could move further discussions to comp.lang.piethun?
>

Fair enough. Will contain PIEthun discussion to the PIEthun mailing
list and the aforementioned newsgroup once it is established.

It suddenly dawned on me while rereading my defense of my use of the
term "array" .... that I wasn't the person who used array.

That came from here and was probably written by someone who has a lot
of experiences in languages other than Python:

http://snippets.dzone.com/posts/show/1713



From pixellee at 163.com  Sat Sep 15 20:43:40 2007
From: pixellee at 163.com (pixellee at 163.com)
Date: Sat, 15 Sep 2007 17:43:40 -0700
Subject: Latest software here!!!!!
In-Reply-To: <1189882311.391961.125720@r29g2000hsg.googlegroups.com>
References: <1189882311.391961.125720@r29g2000hsg.googlegroups.com>
Message-ID: <1189903420.991772.288850@k79g2000hse.googlegroups.com>

On 9 16 ,   2 51 , freesoftwarew... at gmail.com wrote:
> http://freesoftwareupgrades.blogspot.com/

what



From steve at holdenweb.com  Sun Sep 16 19:23:11 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 16 Sep 2007 19:23:11 -0400
Subject: Needless copying in iterations?
In-Reply-To: <13ercljcg60mq99@corp.supernews.com>
References: <fchk59$mm3$1@daisy.noc.ucla.edu>	<5l3ab6F5v20uU3@mid.uni-berlin.de>
	<13eourdrne86e61@corp.supernews.com>	<874phv42to.fsf@benfinney.id.au>
	<13epv3fnb6bak15@corp.supernews.com>	<mailman.611.1189957782.2658.python-list@python.org>
	<13ercljcg60mq99@corp.supernews.com>
Message-ID: <fckdsu$9pb$1@sea.gmane.org>

Steven D'Aprano wrote:
> On Sun, 16 Sep 2007 11:49:15 -0400, Steve Holden wrote:
> 
>>> It seems to me that the "consenting adults" philosophy of Python
>>> doesn't extend to the compiler, and perhaps it should. Maybe Python
>>> could optimize common cases, and if developers wanted to do wacky
>>> things, let them turn optimization off on a module-by-module basis.
>>>
>>> Or even function-by-function. Wouldn't it be nice to have decorators
>>> that could optimize the functions they decorated?
>>>
>> No, it would be disastrous, 
> 
> Disastrous, as in thousands dead, panic in the street, martial law 
> declared? I'm sure your program in important, but is it really *that* 
> important? :-)
> 
To me, naturally. I don't expect you to be quite so engaged :-)
> 
>> unless you could manage to implement a
>> mechanism that *told* you when the optimizations were playing havoc with
>> your program's execution.
> 
> How about "the test suite passes when I turn optimization off, but fails 
> when I turn optimization on"? How is that any different from "the test 
> suite passes when I use StringIO, but not if I use cStringIO"?
> 
Well, firstly it appears to mandate test-driven development. While this 
is a meritorious approach, it seems a rather draconian approach to 
language implementation.
> 
>  
>> The problem is that debugging only works if you can assume a
>> deterministic environment. If you are going to put funky optimizations
>> in that break determinism in "little-used" corner cases, then debugging
>> the situations when the optimizations *do* affect program execution will
>> be a complete pain.
> 
> Right, so we're back to the "any pixel is as likely as any other pixel" 
> example from Joel On Software I mentioned earlier. To prevent some 
> hypothetical developer doing some wacky thing from having to work harder 
> to debug some weird corner case, *everybody else* has to miss out on 
> optimizations that could lead to significantly better performance.
> 
> You might think that's a good trade-off. I don't.
> 
Well I have always gone by the principle "First, make it work. Then (if 
it doesn't work fast enough) make it work faster". Correctness is the 
first requirement. But it's naive to assume, even in a test-driven 
environment, that testing can be complete enough to trigger every 
possible pathology of a compiler that is no longer deterministic.

If you want to ask for that kind of trouble then feel free to go ahead, 
but I fear you will have to proceed without me.
> 
>>>>> for item in alist[1:5]:
>>>>>     alist.append(item) # side-effects DON'T matter
>>>> The compiler doesn't know that, at the time of invocation,
>>>> 'alist.append' doesn't have side effects that matter.
>>> It might if it knows what type alist is, and how long it is (as Marc
>>> Rintsch points out). That's why I used "alist" in my example rather
>>> than "an_arbitrary_sequence".
>>>
>> But alist doesn't *have* a type, and static program analysis would have
>> to be extensive to determine that it could only ever be of a specific
>> type.
> 
> Of course alist has a type. Python is a strongly-typed language, not 
> untyped.
> 
No, alist is a name. It's the objects that names refer to that have 
types. This is not a fatuous point, and I am well aware that Python is a 
strongly-typed language. It as, however, also a late-binding language, 
and it's precisely this aspect of its dynamism which confounds the 
solution you suggest.

> And I don't believe I specifically mentioned that static program analysis 
> was the only optimization possible. But even if it was...
> 
> I can *hand optimize* a function that I write, yes? I might *choose* to 
> say to myself, "Screw duck typing, in *my* program function foo will only 
> ever be called with an honest-to-god built-in list argument, I'm going to 
> optimize it for that case". We're all consenting adults here, right?
> 
> Well, what's the difference between me hand optimizing the function, and 
> calling a built-in decorator that does it for me? Why is it okay for me 
> to shoot myself in the foot, but not for me to tell the compiler to shoot 
> me in the foot?
> 
I'm nit sure what you are saying here. Are you implying that you want to 
include type declarations, or somehow impose them by the use of 
decorators? I'm quite happy to allow you to shoot yourself in the foot, 
because you are a consenting adult. However, it's also the 
responsibility of consenting adults to make sure their behavior doesn't 
harm the uninvolved, and I'm not convinced your approach wouldn't harm 
beginner unaware if its significance.
> 
>>> Because of its very nature, optimizing Python is hard. Even something
>>> as simple as tail-call recursion optimization is verboten, because
>>> Guido considers good stack traces more important than preventing stack
>>> overflows in the first place:
>>>
>>> http://www.tratt.net/laurie/tech_articles/articles/
> tail_call_optimization
>> And who's to say he's wrong, especially since Python is intended to be
>> an environment that's friendly to beginners.
> 
> I'm not saying he's *wrong*, I'm saying he's making trade-offs I would 
> like to see relaxed.
> 
Aah, right. Tough. :-)

> But in the specific case of recursion... have you seen the exception you 
> get when the recursion limit is hit? By default, you get 1000 lines of '  
> File "foo", line 2, in function_name' followed by "RuntimeError: maximum 
> recursion depth exceeded". Maybe I'm missing something there, but I don't 
> see how that's much of a help in debugging.
> 
That assumes a single recursive function. If there are a set of four or 
six mutually recursive functions the collapsing the traceback by 
tail-call optimization makes the situation impossible to debug in any 
straightforward way.
> 
>>> Anyway, I'm not really complaining. I like Python, I'm grateful for the
>>> work the Python-dev people have already done, and I'm in no position to
>>> volunteer to write an optimizing compiler. And it may be that,
>>> regardless of how smart you make the compiler, Python simply can't be
>>> optimized because of design decisions made back in 1990-whatever when
>>> Guido first started his grand plan.
>>>
>> There is some of that. The environment is so dynamic that even something
>> as innocuous as attribute lookup can actually involve properties (for
>> example) reading a relational database! I'm not saying that optimization
>> under these circumstances is possible, but that it's much more difficult
>> than is easily anticipated, and that the benefits to be gained might be
>> less than you would think.
> 
> I'm mostly objecting to people who say that Python's compiler "can't" be 
> optimized, which is not true. As I mentioned, there's already a peephole 
> optimizer. There are runtime optimizations possible. Psycho could become 
> a built-in, if the right people wanted it to become a built-in. Etc. With 
> a few million in funding, Python could become as heavily optimized as 
> Common Lisp.
> 
You seem to be unaware that there are organizations with a very large 
financial stake in Python's success. Given that they aren't providing 
this funding, who do you imagine will?

The PyPy project, to my mind one of the most meritorious projects to 
emerge form the infrastructure in the last few years, is the result of 
"a few million in funding", and it shows far more promise for 
speed-related optimization than CPython ever will, IMHO. But there is 
currently a hiatus in their funding and I am unsure where they are 
planning to go from here.

> Of course, whether that would still be the Python we know *now* is 
> another question. But then, with decorators and generator expressions and 
> iterators, Python 2.6 is not precisely the same as the Python we knew 
> back in 1997, is it?
> 
No. Perhaps what you seek is RPython.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From chris.monsanto at gmail.com  Wed Sep 26 14:41:53 2007
From: chris.monsanto at gmail.com (chris.monsanto at gmail.com)
Date: Wed, 26 Sep 2007 11:41:53 -0700
Subject: A question on python performance.
In-Reply-To: <mailman.1127.1190831666.2658.python-list@python.org>
References: <mailman.1127.1190831666.2658.python-list@python.org>
Message-ID: <1190832113.527114.94230@d55g2000hsg.googlegroups.com>

On Sep 26, 2:26 pm, "Joe Goldthwaite" <j... at goldthwaites.com> wrote:
> Hi everyone,
>
> I'm a developer who's been using python for a couple of years.  I wrote a
> fairly large application using it but I was learning the language at the
> same time so it most of the code kind of sucks.
>
> I've learned a lot since then and I've been going through my code trying to
> organize it better and make better use of Python's features.  I'm still  not
> an expert by any definition but I'm slowly getting better.
>
> I've been working on a trend class that takes twelve monthly numbers and
> returns a period to date, quarter to date, year to date and quarterly year
> to date numbers for a specific period. This worked but I ended up with a lot
> of code like this;
>
> def getValue(trend, param, per):
>    if param == 'Ptd':
>      return trend.Ptd(per)
>    elif param == 'Qtd':
>       return trend.Qtd(per)
>    elif param == 'Ytd':
>       return trend.Ytd(per)
>    elif param == 'YtdQ':
>       return trend.YtdQ(per)
>
> The code gets kind of wordy so I started trying to figure out how to call
> them dynamically since the param type is the same as the method the
> retrieves it.  I came up with this;
>
> def getValue(trend, param, per):
>    return trend.__class__.__dict__[param](trend, per)
>
> That worked but it seems like the above line would have to do lots more
> object look ups at runtime so I didn't think it would be very efficient.  I
> thought maybe I could add a caller method to the trend class and I came up
> with this;
>
> class trend:
>    ...
>    ...
>    ...
>    def caller(self, param, *args):
>       return self.__class__.__dict__[param](self, *args)
>
> This simplified the getValue function to this;
>
> def getValue(trend, param, per):
>         return trend.caller(param, per)
>
> Out of curiosity, I thought I'd do some benchmarking and see which one
> performs the best. I executed three multiple times;
>
> loop one.  Time=11.71 seconds;
>     trend.Ptd(per)
>     trend.Qtd(per)
>     trend.Ytd(per)
>     trend.YtdQ(per)
>
> loop two. 12.107 seconds;
>     trend.__class__.__dict__['Ptd'](trend, per)
>     trend.__class__.__dict__['Qtd'](trend, per)
>     trend.__class__.__dict__['Ytd'](trend, per)
>     trend.__class__.__dict__['YtdQ'](trend, per)
>
> loop three. 17.085 seconds;
>     trend.caller('Ptd', per)
>     trend.caller('Qtd', per)
>     trend.caller('Ytd', per)
>     trend.caller('YtdQ', per)
>
> The first surprise was how close the first and second loops were.  I would
> have thought the first loop would be much faster.  The second surprise was
> how much slower the third loop was.  I know it has an extra call in there
> but other than that, it's doing basically the same thing as loop two.  Is
> there that much overhead in making a class method call?
>
> Can anyone explain the differences?

Makes perfect sense to me! Think about it:

method 1: looks up the method directly from the object (fastest)
method 2: looks up __class__, then looks up __dict__, then gets the
element from __dict__
method 3: looks up caller, looks up __class__, looks up __dict__, gets
element from __dict__

To get the element directly from the object (method 1), Python has to
internally check __class__.__dict__[element], which shows why method 1
and method 2 are nearly the same speed. The last version has to look
up caller in addition to the process described by method 2.

The best way to do what you are doing:

getattr(self, param)(self, *args)



From zentraders at gmail.com  Fri Sep  7 15:26:46 2007
From: zentraders at gmail.com (Zentrader)
Date: Fri, 07 Sep 2007 12:26:46 -0700
Subject: How to determine the bool between the strings and ints?
In-Reply-To: <5kdjmcF31i6hU7@mid.uni-berlin.de>
References: <mailman.227.1189179649.2658.python-list@python.org>
	<1189182688.290480.102350@o80g2000hse.googlegroups.com>
	<mailman.232.1189183755.2658.python-list@python.org>
	<5kdjmcF31i6hU7@mid.uni-berlin.de>
Message-ID: <1189193206.466633.148610@r34g2000hsd.googlegroups.com>

On Sep 7, 11:30 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Fri, 07 Sep 2007 18:49:12 +0200, Jorgen Bodde wrote:
> > As for why caring if they are bools or not, I write True and False to
> > the properties, the internal mechanism works like this so I need to
> > make that distinction.
>
> Really?  Can't you just apply the `int()` function?
>
> In [52]: map(int, [1, 0, True, False])
> Out[52]: [1, 0, 1, 0]
>
> Ciao,
>         Marc 'BlackJack' Rintsch

Blackjack's solution would take care of the problem, so this is just
for general info.  Looks like a "feature" of isinstance() is to
consider both True and 1 as booleans, but type() distinguishes between
the two.
>>> x=True
... if type(x) == type(1):
...    print "int"
... else:
...    print "not int"
...
not int

 if type(x) == type(True):
...    print "bool"
...
bool



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Sep 12 18:53:41 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 13 Sep 2007 00:53:41 +0200
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
Message-ID: <5kr8vlF53m8gU3@mid.individual.net>

TheFlyingDutchman wrote:

> In C++ and Java I don't believe "this" is ever referred to as an
> implicit function parameter. 

Oh yes, it is. All methods use it as a base address into instances.
Implicitly though.

> It is a (sometimes necessary) way to reference the object inside
> one if it's methods. 

Also, I always like to use it explicitly. There's nothing worse than
to read others' source and not know if it's a global they access or
not.

> If it is in fact a real parameter in the underlying compiled-code
> implementation, that knowledge hurts more than it helps.

To which language are you referring here, Python or C++? No matter
what, I still don't really understand why it hurted.

Regards,


Bj?rn

-- 
BOFH excuse #296:

The hardware bus needs a new token.



From afriere at yahoo.co.uk  Tue Sep 25 22:33:50 2007
From: afriere at yahoo.co.uk (Asun Friere)
Date: Tue, 25 Sep 2007 19:33:50 -0700
Subject: jack audio connection kit
In-Reply-To: <mailman.1062.1190752347.2658.python-list@python.org>
References: <mailman.1062.1190752347.2658.python-list@python.org>
Message-ID: <1190774030.603655.85010@d55g2000hsg.googlegroups.com>

On Sep 26, 4:44 am, patrick <pured... at 11h11.com> wrote:
> hello everyone,
>
> is there a way to make python output audio in jack:http://jackaudio.org/
>
> jack is the best audio solution for linux, mac and lately windows. i
> found 1 project called pyjack, but the author remove the software from
> his website.
>
> that would be neat!
> pat

I suggest you email andy [at] a2hd [dot] com and ask him what happened
to PyJack.



From aboudouvas at panafonet.gr  Mon Sep  3 05:03:00 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: Mon, 03 Sep 2007 02:03:00 -0700
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
In-Reply-To: <1188803759.498517.198900@g4g2000hsf.googlegroups.com>
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<1188803759.498517.198900@g4g2000hsf.googlegroups.com>
Message-ID: <1188810180.119298.140840@22g2000hsm.googlegroups.com>

On Sep 3, 9:15 am, Michele Simionato <michele.simion... at gmail.com>
wrote:
> On Sep 3, 2:21 am, llothar <llot... at web.de> wrote:
>

> My personal opinion (and I am not the only one in the Python
> community) is that
> if you want to scale the way to go is to use processes, not threads,
> so removing the GIL would be a waste of effort anyway.
> Look at the 'processing' module in PyPI.
>
>  Michele Simionato


I second that. You may also look here,
http://www.parallelpython.com/

I tested it and work as expected. You can see all your processing-
cores work nicely and balanced.



From sergio.correia at gmail.com  Wed Sep 26 17:50:42 2007
From: sergio.correia at gmail.com (Sergio Correia)
Date: Wed, 26 Sep 2007 16:50:42 -0500
Subject: Simple threading example freezes IDLE?
In-Reply-To: <1190218626.334442.255450@57g2000hsv.googlegroups.com>
References: <1190218626.334442.255450@57g2000hsv.googlegroups.com>
Message-ID: <f1aa6d810709261450k575cf5b6s90615fc98a61eb1f@mail.gmail.com>

I think the -print- command, as used in IDLE, is not thread-safe. I
was bitten by an issue like that today, and the problem ended up being
the -print- command I used.

On the cmd line, it works per-fect-ly.. but IDLE seems to be the culprit.
A possible answer seems to be to write a wrapper for print that makes
it thread safe (with the help of a lock.

On 9/19/07, writser at gmail.com <writser at gmail.com> wrote:
> hey all,
>
> For my study I'm writing a simple threaded webcrawler and I am trying
> to do this in python. But somehow, using threads causes IDLE to crash
> on Windows XP (with the latest python distribution 2.5.1). Even a
> simple example such as this:
>
> import thread, time
>
> def doSomething():
>   print "something"
>
> for i in range(2):
>   thread.start_new(doSomething, ())
>
> causes IDLE to freeze when I type it in the interpreter. Using the
> python command line everything works just fine. Using IDLE on Debian
> linux also does not cause anything to crash. What am I overlooking?
>
> regards, Writser Cleveringa
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From paul.hankin at gmail.com  Thu Sep 20 18:26:29 2007
From: paul.hankin at gmail.com (Paul Hankin)
Date: Thu, 20 Sep 2007 22:26:29 -0000
Subject: about __str__
In-Reply-To: <mailman.835.1190325729.2658.python-list@python.org>
References: <mailman.835.1190325729.2658.python-list@python.org>
Message-ID: <1190327189.852581.170580@57g2000hsv.googlegroups.com>

On Sep 20, 10:08 pm, Konstantinos Pachopoulos <kostaspa... at yahoo.gr>
wrote:
>
> The __str__ method of "list" doesn't seem to call the __str__ method of
> the objects....
> ie, __str__ is not equicalent to the Java toString() method... Anyway,
> how can i fix this?

For whatever reason, __str__ of list calls repr rather than str on
its elements.

You can fix your code by adding __repr__ in your class:

Class CmterIDCmts:
    def __init__ ...
    def __str__ ...

    __repr__ = __str__

--
Paul Hankin



From bjourne at gmail.com  Mon Sep 10 19:16:37 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Tue, 11 Sep 2007 01:16:37 +0200
Subject: [ANN] GtkImageView 1.5.0 and PyGtkImageView 1.0.0 -- Image viewer
	widget for GTK
Message-ID: <740c3aec0709101616k10b57e89yd4af5ed1947e6ef4@mail.gmail.com>

I'm pleased to finally announce GtkImageView 1.5.0. I'm even more
pleased to ALSO announce PyGtkImageView 1.0.0:

Description
-----------
GtkImageView is a simple image viewer widget for GTK+. Similar to the
image viewer panes in gThumb or Eye of Gnome. It makes writing image
viewing and editing applications easy. Among its features are:

* Mouse and keyboard zooming.
* Scrolling and dragging.
* Adjustable interpolation.
* Fullscreen mode.
* GIF animation support.
* Ability to make selections.
* Extensible using a tool system.

PyGtkImageView is the Python bindings for the same thing.

GtkImageView Download
---------------------
Subversion: svn co http://publicsvn.bjourne.webfactional.com/gtkimageview
Tarball:    http://trac.bjourne.webfactional.com/attachment/wiki/WikiStart/gtkimageview-1.5.0.tar.gz
API doc:    http://trac.bjourne.webfactional.com/chrome/common/gtkimageview-docs/

PyGtkImageView Download
-----------------------
Subversion: svn co http://publicsvn.bjourne.webfactional.com/pygtkimageview
Tarball:    http://trac.bjourne.webfactional.com/attachment/wiki/WikiStart/pygtkimageview-1.0.0.tar.gz
API doc:    http://trac.bjourne.webfactional.com/chrome/common/pygtkimageview-docs/
PDF:        http://trac.bjourne.webfactional.com/attachment/wiki/WikiStart/pygtkimageview-1.0.0-api.pdf

Project website: http://trac.bjourne.webfactional.com

Examples
--------
Here is the canonical example for using the widget::

    #include <gtkimageview/gtkimagescrollwin.h>
    #include <gtkimageview/gtkimageview.h>
    ...
    GtkWidget *view = gtk_image_view_new ();
    GtkWidget *scroll = gtk_image_scroll_win_new (GTK_IMAGE_VIEW (view));

    /* Where "box" is a GtkBox already part of your layout. */
    gtk_box_pack_start (GTK_BOX (box), scroll, TRUE, TRUE, 0);

    GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file ("someimage.png", NULL);
    gtk_image_view_set_pixbuf (GTK_IMAGE_VIEW (view), pixbuf, TRUE);

Same thing using PyGtkImageView::

    import gtk
    import gtk.gdk
    import gtkimageview

    view = gtkimageview.ImageView()
    scroll = gtkimageview.ImageScrollWin(view)

    # Where "box" is a gtk.Box already part of your layout.
    box.pack_start(scroll)
    pixbuf = gtk.gdk.pixbuf_new_from_file("someimage.png")
    view.set_pixbuf(pixbuf)

Future
------
* Perl bindings.
* Gtk# bindings.
* Haskell bindings.


-- 
mvh Bj?rn


From wesbrooks at gmail.com  Wed Sep  5 06:26:24 2007
From: wesbrooks at gmail.com (Wesley Brooks)
Date: Wed, 5 Sep 2007 11:26:24 +0100
Subject: concise code (beginner)
In-Reply-To: <13dsvqrqivtf092@corp.supernews.com>
References: <13dsvqrqivtf092@corp.supernews.com>
Message-ID: <eec9f8ee0709050326u6e410ec1l93afe83cfce69f8e@mail.gmail.com>

Try adding all the functions into a list such as;

funcList = [dev.read1, dev.read2, dev.read3]

for func in funcList:
   for dev in devs:
       try:
           func()
       except:
           print exception
           remove dev from devs

Wes.

On 05/09/07, bambam <david at asdf.asdf> wrote:
> I have about 30 pages (10 * 3 pages each) of code like this
> (following). Can anyone suggest a more compact way to
> code the exception handling? If there is an exception, I need
> to continue the loop, and continue the list.
>
> Steve.
>
> -----------------------------------
> for dev in devs
>     try:
>         dev.read1()
>     except
>         print exception
>         remove dev from devs
>
> for dev in devs
>     try:
>         dev.read2()
>     except
>         print exception
>         remove dev from devs
>
> for dev in devs
>     try:
>         dev.read3()
>     except
>         print exception
>         remove dev from devs
>
> etc.
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From bignose+hates-spam at benfinney.id.au  Sun Sep 16 20:50:08 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 17 Sep 2007 10:50:08 +1000
Subject: Python "with"
References: <fck2di$7to$1@ss408.t-com.hr>
Message-ID: <87odg22jzz.fsf@benfinney.id.au>

Ivan Voras <ivoras at __fer.hr__> writes:

> I know it can be almost always done by using a temporary variable:
> 
> tmp = some.big.structure.or.nested.objects.element
> tmp.member1 = something
> tmp.member2 = something
> 
> but this looks ugly to me.)

To me, it looks explicit. Python programmers value explicit code.

In other words, this looks like the right way to do it. The
alternative you're looking for would be to make an implicit reference,
which would make the code harder to follow.

Note that in the specific case of an attribute of a module, the first
lone of the above example can be rewritten as::

    from some.big.package.or.nested.module import element as tmp

which is at least as common as the assignment example above.

-- 
 \          "The only tyrant I accept in this world is the still voice |
  `\                                       within."  -- Mahatma Gandhi |
_o__)                                                                  |
Ben Finney


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Sep 20 06:55:32 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 20 Sep 2007 12:55:32 +0200
Subject: I MEANT ONIX.... [it was Re: ONYX]
In-Reply-To: <1190283378.175422.73290@r29g2000hsg.googlegroups.com>
References: <1190211769.268351.79500@d55g2000hsg.googlegroups.com>
	<46f1726f$0$15276$426a74cc@news.free.fr>
	<1190282489.824709.29050@r29g2000hsg.googlegroups.com>
	<1190283378.175422.73290@r29g2000hsg.googlegroups.com>
Message-ID: <46f25191$0$29574$426a34cc@news.free.fr>

korovev76 at gmail.com a ?crit :
(top-post corrected)
> On 20 Set, 12:01, korove... at gmail.com wrote:
>> On 19 Set, 21:02, Bruno Desthuilliers
>>
>> <bdesth.quelquech... at free.quelquepart.fr> wrote:
>>
>>> I don't know what's "onyx-style" xml,
>> i'm not used to xml, so for meonyxis just a mess...http://www.onyx.com/Products/xml.asp

 > i'm such a lame... i meant onix... not onyx...
 > http://xml.coverpages.org/onix.html
 >
 > the questions remain the same ones...
 >
>
>>> but if it's xml, any xml parser
>>> will parse it, and any validating parser should be able to validate it
>>> given the correct DTD.
>> For example?where do I find a good validating parser?

First question : do you *really* need a validating parser ?

Second question : did you try to google for
   "+Python +validating +XML +parser"



From carsten at uniqsys.com  Tue Sep 25 06:01:29 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Tue, 25 Sep 2007 06:01:29 -0400
Subject: obtaining multiple values from a function.
In-Reply-To: <87zlzbrsih.fsf@rudin.co.uk>
References: <1190708155.683502.93040@r29g2000hsg.googlegroups.com>
	<87sl53m90t.fsf@benfinney.id.au>  <87zlzbrsih.fsf@rudin.co.uk>
Message-ID: <1190714489.3402.8.camel@dot.uniqsys.com>

On Tue, 2007-09-25 at 10:41 +0100, Paul Rudin wrote:
> Going off on a tangent a bit, but I was idly considering the absence
> of itertools.ireduce the other day. A problem is that reduce gives a
> single result, so it's not clear what ireduce would do (perhaps why
> it's not there). One obvious candidate would be to give the whole
> sequence of partial reductions. I'm not sure if this would be
> generally useful, but it would give a succinct way to do the Fibonacci
> sequence:
> 
> itertools.ireduce(operator.add, itertools.count())

Let's try it:

>>> def ireduce(op, iterable, partial=0):
...   for nxt in iterable:
...     partial = op(partial, nxt)
...     yield partial
... 
>>> import operator
>>> from itertools import islice, count
>>> 
>>> for x in islice(ireduce(operator.add, count()), 0, 10):
...   print x
... 
0
1
3
6
10
15
21
28
36
45

That's not the Fibonacci sequence.

-- 
Carsten Haese
http://informixdb.sourceforge.net




From mail at microcorp.co.za  Thu Sep 20 02:56:02 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 20 Sep 2007 08:56:02 +0200
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com><dea92f560709021735l2c72d53ew94410fcb33b9b50b@mail.gmail.com><mailman.303.1188779927.28954.python-list@python.org><1190164166.378500.155990@o80g2000hse.googlegroups.com>
	<13f2hctdoob87e5@corp.supernews.com>
Message-ID: <00f701c7fb59$3272e480$03000080@hendrik>


 "Steven D'Aprano" <steve at REMOVEau> wrote:

> 
> I think a better question is, how much faster/slower would Stein's code 
> be on today's processors, versus CPython being hand-simulated in a giant 
> virtual machine made of clockwork?

This obviously depends on whether or not the clockwork is orange

- Hendrik



From zzbbaadd at aol.com  Mon Sep 17 03:12:57 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Mon, 17 Sep 2007 00:12:57 -0700
Subject: Python 3K or Python 2.9?
In-Reply-To: <mailman.563.1189823461.2658.python-list@python.org>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<87sl5j5r34.fsf@benfinney.id.au>
	<1189646281.569796.267940@d55g2000hsg.googlegroups.com>
	<87ir6f5mrq.fsf@benfinney.id.au>
	<1189651204.408268.57580@19g2000hsx.googlegroups.com>
	<1i4dddf.piaojwz9lz40N%aleax@mac.com>
	<1189700775.661780.292150@50g2000hsm.googlegroups.com>
	<46e97917$0$9014$426a74cc@news.free.fr>
	<mailman.563.1189823461.2658.python-list@python.org>
Message-ID: <1190013177.473529.167770@o80g2000hse.googlegroups.com>


>
> <Ironic>
>
> Hi, I'm new to Python, I don't even fully know the language, never done
> a full project in Python. What's more, probably I'll never will.
> But that's not the point, the point is I want YOU people to modify the
> language you know in and out, the program with which you've done many
> systems, I want you to change it to suit my whims, so that I'll be
> comfortable with the 3 ten liners I'll write.
> TIA
>
> </Ironic>

<Zobionic>
Hi, I've used Python and have fallen in love with it. I know exactly
how Guido pronounces his name and since I saw him use the obtuse
phrase syntactic sugar I try and work it into every discussion I have
on Python syntax. I hate it when anyone offers criticism of Guido's
language. I have a picture of Bruce Eckel with a red universal not
sign over it on my wall and I throw my mechanical pencils at it every
night. I am especially upset when someone talks bad about kluges like
@staticmethod or FunctionName = staticmethod(FunctionName). Sure "def
static" or "static def" would be so much cleaner, simpler and clearer
but let's face it my fellow Pythonistas, this language may have
started out based on what was easy for people to learn and use but
we're in Nerdville now and clean and clear have become roadblocks! I
have so much more respect for Perl and the way it developed now!
</Zombionic>



From hniksic at xemacs.org  Fri Sep 21 10:14:33 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Fri, 21 Sep 2007 16:14:33 +0200
Subject: __contains__() and overload of in : Bug or Feature ???
References: <1190383050.514560.232660@50g2000hsm.googlegroups.com>
Message-ID: <87y7f0cdh2.fsf@mulj.homelinux.net>

"sebastien.lannez at gmail.com" <sebastien.lannez at gmail.com> writes:

>> The string "yop" evaluates to the boolean value True, as it is not
>> empty.
>
> Does it means that when overloading an operator, python just
> wrap the call to the method and keep control of the returned
> values ???

In case of 'in' operator, it does.


From kay.schluehr at gmx.net  Mon Sep 24 06:23:22 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Mon, 24 Sep 2007 03:23:22 -0700
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <5lp64dF95s07U1@mid.uni-berlin.de>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<1190413322.962737.53900@r29g2000hsg.googlegroups.com>
	<1190414192.636397.146450@57g2000hsv.googlegroups.com>
	<1190443748.907702.154660@22g2000hsm.googlegroups.com>
	<7xlkazgpc5.fsf@ruckus.brouhaha.com>
	<1190447257.060479.141280@n39g2000hsh.googlegroups.com>
	<5lk2olF8gic1U5@mid.uni-berlin.de>
	<1190454275.282176.90830@k79g2000hse.googlegroups.com>
	<46f6e9b0$0$32168$426a74cc@news.free.fr>
	<1190597548.214612.181140@22g2000hsm.googlegroups.com>
	<5lp64dF95s07U1@mid.uni-berlin.de>
Message-ID: <1190629402.040102.175860@50g2000hsm.googlegroups.com>

On Sep 24, 9:09 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:

> Python:
>
> class B(object):
>     def __init__(self):
>         self.things = list()
>
>     def add(self, thing):
>         self.things.append(thing)
>
> And Io:
>
> B := Object clone do(
>     init := method(
>         self things := list()
>         self
>     )
>
>     add := method(thing,
>         self things append(thing)
>     )
> )
>
> The `init` is called by the default `clone` method automatically just like
> `__init__()` in Python.  It is really much like the class/instance
> relationship in Python with just the line between class and instance
> blurred.

[...]

> Ciao,
>         Marc 'BlackJack' Rintsch

O.K. Marc, I'm convinced by the examples you presented. So init is
also special in Io and is called at the clone event to fill object
slots with data.

Now I have to track back in the discussion thread to remember why we
started to talk about Io...



From gslindstrom at gmail.com  Mon Sep 17 22:07:18 2007
From: gslindstrom at gmail.com (Greg Lindstrom)
Date: Mon, 17 Sep 2007 21:07:18 -0500
Subject: Why 'class spam(object)' instead of class spam(Object)' ?7
Message-ID: <a9f39a410709171907o29a3ebaamfaf21129bfe9e511@mail.gmail.com>

>
> Does the user care whether an object is implemented in C?
>
> Colin W.
>
> You're damn right I care!  This is critical to just about everything I
write because...well..I mean....well.  I guess it isn't really all that
important.  Never mind.

--greg
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From shankarjee at gmail.com  Wed Sep 12 17:00:52 2007
From: shankarjee at gmail.com (Shankarjee Krishnamoorthi)
Date: Wed, 12 Sep 2007 16:00:52 -0500
Subject: File Parsing Question
Message-ID: <ead600e10709121400l57822car8925eea30339b47c@mail.gmail.com>

Hi,
   I am new to Python. I am trying to do the following

inp = open(my_file,'r')

for line in inp:
  # Perform some operations with line
   if condition something:
         # Start re reading for that position again
         for line in inp:
              if some other condition
                     break
         # I need to go back one line and use that line value.
         # I need to perform the operations which are listed in the
top with this line
         #  value. I cannot push that operation here
         # I cannot do this with seek or tell.

In Perl this is what I have
while (<inp> ){
           # my_operations
           next if /pattern/
           while (<inp>) {
                   operations again
                   last if /pattern2/
           }
           seek(inp,(-1-length),1)
}

This works perfectly in Perl. Can I do the same in Python.

Thanks
Jee


From zzbbaadd at aol.com  Mon Sep 10 17:11:37 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Mon, 10 Sep 2007 14:11:37 -0700
Subject: Enum class with ToString functionality
In-Reply-To: <46e59bf7$0$21897$426a74cc@news.free.fr>
References: <1189416537.050002.61120@r34g2000hsd.googlegroups.com>
	<1189425154.788466.132370@d55g2000hsg.googlegroups.com>
	<46e59bf7$0$21897$426a74cc@news.free.fr>
Message-ID: <1189458697.707725.244980@g4g2000hsf.googlegroups.com>

On Sep 8, 9:52 am, Bruno Desthuilliers
<bdesth.quelquech... at free.quelquepart.fr> wrote:
> TheFlyingDutchman a ?crit :
>
>
>
> > On Sep 10, 2:28 am, bg... at yahoo.com wrote:
>
> >>Hi,
>
> >>I have the following class -
>
> >>class TestOutcomes:
> >>    PASSED = 0
> >>    FAILED = 1
> >>    ABORTED = 2
>
> >>plus the following code -
>
> >>testResult = TestOutcomes.PASSED
>
> >>testResultAsString
> >>if  testResult == TestOutcomes.PASSED:
> >>    testResultAsString = "Passed"
> >>elif testResult == TestOutcomes.FAILED :
> >>    testResultAsString = "Failed"
> >>else:
> >>    testResultAsString = "Aborted"
>
> >>But it would be much nicer if I had a function to covert to string as
> >>part of the TestOutcomes class. How would I implement this?
>
> >>Thanks,
>
> >>Barry
>
> > class TestOutcomes:
> >     PASSED = 0
> >     FAILED = 1
> >     ABORTED = 2
>
> >     def ToString(outcome):
> >         if  outcome == TestOutcomes.PASSED:
> >            return "Passed"
> >         elif outcome == TestOutcomes.FAILED :
> >            return "Failed"
> >         else:
> >            return "Aborted"
>
> >     ToString = staticmethod(ToString)
>
> > if __name__ == "__main__":
> >     testResult = TestOutcomes.PASSED
> >     testResultAsString = TestOutcomes.ToString(testResult)
> >     print testResultAsString
> >     print TestOutcomes.ToString(testResult)
>
> Technically correct, but totally unpythonic.

Speaking of unpythonic, I would call

  ToString = staticmethod(ToString)

A Perlific syntax.

>
> May I suggest some reading ?http://dirtsimple.org/2004/12/python-is-not-java.html

Well the Foo.Foo complaint is bogus:

from Foo import Foo



From iclark at mail.ewu.edu  Thu Sep 20 19:35:41 2007
From: iclark at mail.ewu.edu (Ian Clark)
Date: Thu, 20 Sep 2007 16:35:41 -0700
Subject: I could use some help making this Python code run faster using
	only Python code.
In-Reply-To: <1190330015.131971.265680@y42g2000hsy.googlegroups.com>
References: <1190325588.608625.259800@q3g2000prf.googlegroups.com>	<1190328413.226577.206740@k79g2000hse.googlegroups.com>
	<1190330015.131971.265680@y42g2000hsy.googlegroups.com>
Message-ID: <fcv04e$563$1@sea.gmane.org>

mensanator at aol.com wrote:
> On Sep 20, 5:46 pm, Paul Hankin <paul.han... at gmail.com> wrote:
>> On Sep 20, 10:59 pm, Python Maniac <raych... at hotmail.com> wrote:
>>
>>> I am new to Python however I would like some feedback from those who
>>> know more about Python than I do at this time.
>>> def scrambleLine(line):
>>>     s = ''
>>>     for c in line:
>>>         s += chr(ord(c) | 0x80)
>>>     return s
>>> def descrambleLine(line):
>>>     s = ''
>>>     for c in line:
>>>         s += chr(ord(c) & 0x7f)
>>>     return s
>>> ...
>> Well, scrambleLine will remove line-endings, so when you're
>> descrambling
>> you'll be processing the entire file at once. This is particularly bad
>> because of the way your functions work, adding a character at a time
>> to
>> s.
>>
>> Probably your easiest bet is to iterate over the file using read(N)
>> for some small N rather than doing a line at a time. Something like:
>>
>> process_bytes = (descrambleLine, scrambleLine)[action]
>> while 1:
>>     r = f.read(16)
>>     if not r: break
>>     ff.write(process_bytes(r))
>>
>> In general, rather than building strings by starting with an empty
>> string and repeatedly adding to it, you should use ''.join(...)
>>
>> For instance...
>> def descrambleLine(line):
>>   return ''.join(chr(ord(c) & 0x7f) for c in line)
>>
>> def scrambleLine(line):
>>   return ''.join(chr(ord(c) | 0x80) for c in line)
>>
>> It's less code, more readable and faster!
> 
> I would have thought that also from what I've heard here.
> 
> def scrambleLine(line):
>     s = ''
>     for c in line:
>         s += chr(ord(c) | 0x80)
>     return s
> 
> def scrambleLine1(line):
>     return ''.join([chr(ord(c) | 0x80) for c in line])
> 
> if __name__=='__main__':
>     from timeit import Timer
>     t = Timer("scrambleLine('abcdefghijklmnopqrstuvwxyz')", "from
> __main__ import scrambleLine")
>     print t.timeit()
> 
> ##  scrambleLine
> ##  13.0013366039
> ##  12.9461998318
> ##
> ##  scrambleLine1
> ##  14.4514098748
> ##  14.3594400695
> 
> How come it's not? Then I noticed you don't have brackets in
> the join statement. So I tried without them and got
> 
> ##  17.6010847978
> ##  17.6111472418
> 
> Am I doing something wrong?
> 
>> --
>> Paul Hankin
> 
> 

I got similar results as well. I believe the reason for join actually 
performing slower is because join iterates twice over the sequence. [1] 
The first time is to determine the size of the buffer to allocate and 
the second is to populate the buffer.

Ian

[1] http://mail.python.org/pipermail/python-list/2007-September/458119.html



From attn.steven.kuo at gmail.com  Tue Sep 11 01:46:34 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: Mon, 10 Sep 2007 22:46:34 -0700
Subject: Mac OSX sqlite problem. Missing?
In-Reply-To: <1189457469.285055.212670@r29g2000hsg.googlegroups.com>
References: <1189455305.994439.107100@r34g2000hsd.googlegroups.com>
	<5klocbF498ruU1@mid.uni-berlin.de>
	<1189457469.285055.212670@r29g2000hsg.googlegroups.com>
Message-ID: <1189489594.584753.312330@g4g2000hsf.googlegroups.com>

On Sep 10, 1:51 pm, ricardo.turp... at gmail.com wrote:
> Diez B. Roggisch wrote:
>
> > Are you by any chance using the python 2.3 when issuing that import
> > statement?
>
> > Diez
>
> Unfortunately not :(
>
> ibook:~/project1$ python -V
> Python 2.5
> ibook:~/project1$ python
> Python 2.5 (r25:51918, Sep 19 2006, 08:49:13)
> [GCC 4.0.1 (Apple Computer, Inc. build 5341)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.>>> import sqlite
>
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> ImportError: No module named sqlite
>
>




Isn't it sqlite3 (instead of sqlite)?

Python 2.5.1c1 (r251c1:54692, Apr 17 2007, 21:12:16)
[GCC 4.0.0 (Apple Computer, Inc. build 5026)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import sqlite3
>>> sqlite3.Connection
<type 'sqlite3.Connection'>
>>> sqlite3.Connection.__doc__
'SQLite database connection object.'
>>>


I also see it under that name in the repository:

    http://svn.python.org/view/python/trunk/Lib/sqlite3/

--
Hope this helps,
Steven



From rschroev_nospam_ml at fastmail.fm  Fri Sep  7 05:41:13 2007
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Fri, 07 Sep 2007 09:41:13 GMT
Subject: unexpected behavior: did i create a pointer?
In-Reply-To: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>
References: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>
Message-ID: <Z09Ei.92551$wA4.3469404@phobos.telenet-ops.be>

gu schreef:
> copyOfA = a
> 
> now, in the second "for" cycle and in functionA() i only 'touch' copyOfA 
> (altering it).

copyOfA isn't a copy of a; it's a different name bound to the same 
object as a. You can verify that: id(a) and id(copyOfA) will return the 
same value.

To make a copy of a (assuming a is a dict), you can do:

copyOfA = dict(a)

or

copyOfA = a.copy()

or more generally

import copy
copyOfA = copy.copy(a)


Cheers,
Roel

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From steve at holdenweb.com  Thu Sep  6 07:52:11 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 06 Sep 2007 04:52:11 -0700
Subject: interesting puzzle......try this you will be rewarded...
In-Reply-To: <13dvn2q9qogq484@corp.supernews.com>
References: <1189072576.997085.32360@r29g2000hsg.googlegroups.com>
	<13dvn2q9qogq484@corp.supernews.com>
Message-ID: <fbopld$1je$2@sea.gmane.org>

Steven D'Aprano wrote:
> On Thu, 06 Sep 2007 09:56:16 +0000, Renu wrote:
> 
>> Hi,
>>
>> Just click on this link n use ur common sence to navigate.
>>
>> It has 23 pages one after the other, starting from this first
>> Page. The trick is to find a way to go to the next page.
> 
> [snip]
> 
> In case it wasn't obvious, the site is nothing but adware. Banner ads, 
> google ads, text ads, blah blah blah. I stopped at page 1.
> 
> 
I'm surprised you went even that far. It was pretty obviously going to 
be a click trap. Why bother?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From fw3 at hotmail.co.jp  Fri Sep  7 13:37:00 2007
From: fw3 at hotmail.co.jp (wang frank)
Date: Fri, 07 Sep 2007 17:37:00 +0000
Subject: Speed of Python
In-Reply-To: <1189185542.798286.168880@50g2000hsm.googlegroups.com>
Message-ID: <BAY122-F37CD62BB3682998CD2C45AB4C50@phx.gbl>

Hi, 
Here is the matlab code:
function [z]=bench1(n)
for i=1:n,
    for j=1:1000,
        z=log(j);
        z1=log(j+1);
        z2=log(j+2);
        z3=log(j+3);
        z4=log(j+4);
        z5=log(j+5);
        z6=log(j+6);
        z7=log(j+7);
        z8=log(j+8);
        z9=log(j+9);
    end
end
z = z9;

I am not familiar with python, so I just simply try to reproduce the same 
code in python.
If you think that my python script is not efficient, could you tell me how 
to make it more efficient?

Thanks

Frank

>From: Roberto Bonvallet <rbonvall at gmail.com>
>To: python-list at python.org
>Subject: Re: Speed of Python
>Date: Fri, 07 Sep 2007 17:19:02 -0000
>
>On Sep 7, 12:42 pm, "wang frank" <f... at hotmail.co.jp> wrote:
> > Here is the bench1.py:
> > import math
> > def bench1(n):
> >         for i in range(n):
> >                 for j in range(1000):
> >                         m=j+1
> >                         z=math.log(m)
> >                         z1=math.log(m+1)
> >                         z2=math.log(m+2)
> >                         z3=math.log(m+3)
> >                         z4=math.log(m+4)
> >                         z5=math.log(m+5)
> >                         z6=math.log(m+6)
> >                         z7=math.log(m+7)
> >                         z8=math.log(m+8)
> >                         z9=math.log(m+9)
> >         return z9
> >
> > Is my conclusion correct that Python is slower than matlab?
>
>Show us your Matlab code in order to see if both are equivalent.
>Your Python code creates n lists of 1000 elements, so you're not
>actually
>measuring only the numeric computations.
>
>Cheers,
>--
>Roberto Bonvallet
>


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

_________________________________________________________________
??????????????????????????????????? 
http://messenger.live.jp/ 



From whamil1 at entergy.com  Tue Sep 11 07:40:28 2007
From: whamil1 at entergy.com (Hamilton, William )
Date: Tue, 11 Sep 2007 06:40:28 -0500
Subject: Checking if elements are empty
In-Reply-To: <fc468r$fd4$1@sea.gmane.org>
Message-ID: <588D53831C701746A2DF46E365C018CE01D2CB39@LITEXETSP001.etrsouth.corp.entergy.com>

> From: Steve Holden
> Neil Cerutti wrote:
> > On 2007-09-10, Chris Mellon <arkanes at gmail.com> wrote:
> >> On 9/10/07, Neil Cerutti <horpner at yahoo.com> wrote:
> >>> Agreed; but I prefer 'if y[0] == ""', absent more context and
> >>> better names.
> >> Probably should use u"" if you're going to take that route, as
> >> this will fail spuriously if y[0] contains a unicode string
> >> that can't be implicitly converted to ascii. Personally, I
> >> prefer the boolean check and I'll let operations fail elsewhere
> >> if there's a type mismatch.
> >
> > I have a quibble not with the functionality of the boolean check,
> > but with its expressiveness. if y[0] == "" expresses more, i.e.,
> > that I expect y[0] to contain a Python byte string.
> >
> I have a quibble with a test that will raise an exception when the
> anticipated condition is true. Your test is patently absurd, as you
> would have discovered had you bothered to try it:
> 
>  >>> y = ""
>  >>> if y[0] == "":
> ...   print "True"
> ... else:
> ...   print "False"
> ...
> Traceback (most recent call last):
>    File "<stdin>", line 1, in <module>
> IndexError: string index out of range
>  >>>
> 
> Further, when the string is *not* the null string the test will always
> return False, as you will be comparing two strings of unequal length.
> 
> So, absent a solution that works, len(y) == 0 looks pretty good.


Going back to the OP, the problem is taking a string such as
>>> x = '  \t"ff'
then splitting that string like this
>>> y = x.split('\t')

The question is, does the first element of the list y contain an empty
string or not?  In this case, the logic in the following conditional is
perfectly valid.
>>> if y[0] == "":
...    print "True"
... else
...    print "False"

(len(y[0]) == 0) would also work, and is the solution you originally
gave the OP.  


--
-Bill Hamilton


From nick at craig-wood.com  Thu Sep 20 05:30:16 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Thu, 20 Sep 2007 04:30:16 -0500
Subject: compile for ARM
References: <mailman.774.1190221806.2658.python-list@python.org>
	<5ld5avF7ne3mU1@mid.uni-berlin.de>
	<1190226961.806875.205530@i13g2000prf.googlegroups.com>
	<1190242283.372338.253440@22g2000hsm.googlegroups.com>
Message-ID: <slrnff4c4s.dv5.nick@irishsea.home.craig-wood.com>

Paul Boddie <paul at boddie.org.uk> wrote:
>  On 19 Sep, 20:36, Paul McGuire <pt... at austin.rr.com> wrote:
>  The inquirer might also consider crosstool, which is good at building
>  cross-compilers for GNU/Linux targeting "Embedded Linux":
> 
>  http://www.kegel.com/crosstool/
> 
>  As for building Python itself, searching the Python bug tracker for
>  "cross-compile" might provide some patches and advice:

You could also do the build using qemu which can emulate an ARM
system.

Debian do a complete ARM userspace, so you can install that under qemu
and do native builds.

Cross compilers work well though - we build our app which has python
embedded for ARM using a cross compiler running under debian.

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


From namesagame-usenet at yahoo.com  Thu Sep 13 12:25:49 2007
From: namesagame-usenet at yahoo.com (gamename)
Date: Thu, 13 Sep 2007 09:25:49 -0700
Subject: Python+Expect+Win32 = Not Possible?
In-Reply-To: <1189684296.283237.286220@g4g2000hsf.googlegroups.com>
References: <1189657637.539038.317280@k79g2000hse.googlegroups.com>
	<1189684296.283237.286220@g4g2000hsf.googlegroups.com>
Message-ID: <1189700749.642756.27830@o80g2000hse.googlegroups.com>

On Sep 13, 4:51 am, Philem <jimrtho... at gmail.com> wrote:
> On Sep 13, 12:27 am, gamename <namesagame-use... at yahoo.com> wrote:
>
> > Hi,
>
> > Is it still the case there is no practical Expect-like module for
> > win32? I know that cygwin can support pexpect, but that isn't an
> > option here --- I have to use a native win32 Python version.
>
> > Are there alternatives, or is it simply not an option to replicate
> > Expect on win32 with python?
>
> > All I'm trying to do is start a couple processes, wait for each to say
> > "done" on stdout and then quit (or timeout if something went wrong).
>
> > TIA,
> > -T
>
> You could try this link:http://www.activestate.com/Products/activetcl/features.plex
> and see if that gives you what you need.

It absolutely gives me what I need.  But the requirement is to use
Python specifically. :)  Tcl is a great language, but not an option in
this case.
>
> Luck!
> -J




From steve at REMOVE-THIS-cybersource.com.au  Fri Sep  7 22:58:33 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sat, 08 Sep 2007 02:58:33 -0000
Subject: Generating a unique identifier
References: <13e2fgbbpsatm39@corp.supernews.com>
	<7x3axq7a8a.fsf@ruckus.brouhaha.com>
	<7xodgejx3l.fsf@ruckus.brouhaha.com>
Message-ID: <13e43ups034ld13@corp.supernews.com>

On Fri, 07 Sep 2007 08:47:58 -0700, Paul Rubin wrote:

> Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
>> def unique_id():
>>    return os.urandom(10).encode('hex')
> 
> Sorry, make that 32 or 40 instead of 10, if the number of id's is large,
> to make birthday collisions unlikely.

I did a small empirical test, and with 16 million ids, I found no 
collisions.

However, I did find that trying to dispose of a set of 16 million short 
strings caused my Python session to lock up for twenty minutes until I 
got fed up and killed the process. Should garbage-collecting 16 million 
strings really take 20+ minutes?


> If you don't want the id's to be that large, you can implement a Feistel
> cipher using md5 or sha as the round function pretty straightforwardly,
> then just feed successive integers through it. That also guarantees
> uniqueness, at least within one run of the program.  I have some sample
> code around for that, let me know if you need it.

I'm not sure that I need it, but I would certainly be curious to see it.


Thanks,


-- 
Steven.


From ebgssth at gmail.com  Sat Sep 15 08:51:20 2007
From: ebgssth at gmail.com (js)
Date: Sat, 15 Sep 2007 21:51:20 +0900
Subject: how to join array of integers?
In-Reply-To: <1189859762.563599.269270@g4g2000hsf.googlegroups.com>
References: <1189859762.563599.269270@g4g2000hsf.googlegroups.com>
Message-ID: <a23effaf0709150551g19c611eqe1c912acf02306d3@mail.gmail.com>

print ''.join([str(i) for i in [1,2,3]])

On 9/15/07, Summercool <Summercoolness at gmail.com> wrote:
> i think in Ruby, if you have an array (or list) of integers
>
> foo = [1, 2, 3]
>
> you can use foo.join(",") to join them into a string "1,2,3"
>
> in Python... is the method to use  ",".join() ?  but then it must take
> a list of strings... not integers...
>
> any fast method?
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From steve at holdenweb.com  Sat Sep 15 23:29:25 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 15 Sep 2007 23:29:25 -0400
Subject: List append
In-Reply-To: <pan.2007.09.16.03.05.07.420599@member.fsf.org>
References: <1189826727.204061.310380@d55g2000hsg.googlegroups.com>
	<pan.2007.09.16.03.05.07.420599@member.fsf.org>
Message-ID: <fci7ul$6h2$1@sea.gmane.org>

Rob E wrote:
> On Sat, 15 Sep 2007 03:25:27 +0000, mouseit wrote:
> 
>> I'm trying to add an element to a list which is a property of an
>> object, stored in an array. When I append to one element, all of the
>> lists are appended!
>>
>> Example Code:
>>
>> class Test:
>>     array = []
>>
>> myTests = [Test() , Test() , Test()]
>> print len(myTests[1].array)
>> myTests[0].array.append( 5 )
>> print len(myTests[1].array)
>>
>> prints:
>> 0
>> 1
>>
>> This is probably a really easy question (I'm very new to python), so
>> thanks in advance for your help!
> 
> Yes, that's easy:
> 
> class myclass:
>    var1 = []
> 
> means that var1 is associated with the class.  If you want an attribute:
> 
> class myclass:
>     def __init__ (self):
>         self.var1 = []
> 
> is the correct way.
> 
It's easy to get confused, though, because when you try to access an 
instance attribute, if the attribute isn't found in the instance the 
interpreter will then look in the class, and then (if there is one) in 
the class's superclass, and so on.

A further complication arises with methods, since even when the method 
is acquired by inheritance it is bound to the instance.

 >>> class Mine(object):
...   pass
...
 >>> Mine.__init__
<slot wrapper '__init__' of 'object' objects>
 >>> mine = Mine()
 >>> mine.__init__
<method-wrapper '__init__' of Mine object at 0x7ff2c3cc>
 >>>

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From carsten at uniqsys.com  Mon Sep 10 09:31:10 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 10 Sep 2007 09:31:10 -0400
Subject: encoding latin1 to utf-8
In-Reply-To: <1189429907.971736.307210@57g2000hsv.googlegroups.com>
References: <1189427146.723304.270600@22g2000hsm.googlegroups.com>
	<mailman.315.1189428513.2658.python-list@python.org>
	<1189429907.971736.307210@57g2000hsv.googlegroups.com>
Message-ID: <1189431070.3385.28.camel@dot.uniqsys.com>

On Mon, 2007-09-10 at 13:11 +0000, Harshad Modi wrote:
> thx for Reply ,
> but I need some basic knowledge . how to encoding ? which algorithm
> use for that . bz my data has some special char , i have not
> confidence   this function got proper result. i want to make my own
> function  / script for encoding.

For basic knowledge about Unicode and character encodings, I highly
recommend amk's excellent Unicode How-To here:
http://www.amk.ca/python/howto/unicode

Once you've read and understood the How-To, I suggest you examine the
following:

1) Are you *sure* that the special characters in the original file are
latin-1 encoded? (If you're not sure, try to look at the file in a HEX
editor to see what character codes it uses for the special characters).
2) Are you sure that what you were using to look at the result file
understands and uses UTF-8 encoding? How are you telling it to use UTF-8
encoding?

Hope this helps,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From steve at REMOVE-THIS-cybersource.com.au  Thu Sep 20 00:16:33 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Thu, 20 Sep 2007 04:16:33 -0000
Subject: super() doesn't get superclass
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au> <87k5qn5cwi.fsf@mulj.homelinux.net>
	<87y7f2w0xj.fsf@benfinney.id.au> <13f3pbfh7to7k4b@corp.supernews.com>
	<873axavwhi.fsf@benfinney.id.au>
Message-ID: <13f3t11ql8s5c16@corp.supernews.com>

On Thu, 20 Sep 2007 13:36:41 +1000, Ben Finney wrote:

> Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> writes:
> 
>> On Thu, 20 Sep 2007 12:00:40 +1000, Ben Finney wrote:
>> 
>> > In its latter form, it is worthless to me when I'm looking for "get
>> > superclass of A", but its name and parameters and documentation all
>> > lead me very strongly to believe otherwise.
>> 
>> Why are you looking for the superclass of A?
> 
> Currently irrelevant to the point. Whether for good or bad reasons, I
> looked for a way to "get the superclass of A". 

A.__base__ and A.__bases__ are, I believe, the "right" way to do that.


> Everything about 'super'
> ? its name, parameter semantics, and documentation ? all firmly led me
> to believe that was the correct function for that purpose.

Name, I can accept.

Parameter semantics? That's borderline. "Get the superclass of A" looks 
like it should take ONE and ONLY one argument, namely A. super() 
typically takes two arguments, and only in non-typical use does it take a 
single argument.

And documentation? From help(super):


class super(object)
 |  super(type) -> unbound super object
 |  super(type, obj) -> bound super object; requires isinstance(obj, type)
 |  super(type, type2) -> bound super object; requires issubclass(type2, 
type)
 |  Typical use to call a cooperative superclass method:
 |  class C(B):
 |      def meth(self, arg):
 |          super(C, self).meth(arg)


Hmmm... it says it returns a super object, not a type or a class and 
certainly not "the superclass". It doesn't say what a super object 
actually is, but it doesn't say it is a type, or it would say "returns a 
type object". Nor does it say it returns the superclass -- it doesn't 
even use the term, with or without the hyphen.

And with a typical example shown right there, so close to the top, the 
documentation is pretty clear that super() doesn't do what you imagined 
it does.

So while I accept that the name of super() is misleading, I don't accept 
that the documentation is misleading. Incomplete, yes, hard to 
understand, yes, but not misleading. 

At least, it didn't mislead _me_, and I'm pretty gullible sometimes... 
*wink*



-- 
Steven.


From sajmikins at gmail.com  Thu Sep 27 22:18:21 2007
From: sajmikins at gmail.com (Simon Forman)
Date: Thu, 27 Sep 2007 19:18:21 -0700
Subject: cute use of lambda
Message-ID: <1190945901.551940.165240@k79g2000hse.googlegroups.com>

class FakeQueue(list):
    put = list.append
    get = lambda self: self.pop(0)


;]



From steve at holdenweb.com  Sun Sep 16 18:42:20 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 16 Sep 2007 18:42:20 -0400
Subject: Processing drag & drop on the desktop
In-Reply-To: <200709162124.38761.forty-two@is.nonze.ro>
References: <1189961614.510561.194610@w3g2000hsg.googlegroups.com>
	<200709162124.38761.forty-two@is.nonze.ro>
Message-ID: <fckbgb$3i5$1@sea.gmane.org>

Thomas Jollans wrote:
> On Sunday 16 September 2007, Pierre Quentel wrote:
>> Hi all,
>>
>> I would like to create an application on a Windows machine, such that
>> when a document is dragged and dropped on the application icon on the
>> desktop, the document is processed by the application
>>
>> For instance, if I drag & drop an Outlook message or a PPT
>> presentation, the application would propose to tag the document with
>> keywords taken from a database
>>
>> Is it possible to do this with a Python script, and how ?
> 
> Maybe the file name is passed as a command-line argument ?
> 
This may give you some information that help, but it's not file-based. 
You should be able to at least use it to explore the interface to 
Windows Explorer, though:

http://fraca7.free.fr/blog/index.php?2006/11/15/53-thunderbird-drag-and-drop-with-wxpython

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From stefan.behnel-n05pAM at web.de  Tue Sep 25 03:50:26 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Tue, 25 Sep 2007 09:50:26 +0200
Subject: Google and Python
In-Reply-To: <mailman.1031.1190705678.2658.python-list@python.org>
References: <1190228512.627109.308910@n39g2000hsh.googlegroups.com><ufadnRC5BPZm6GzbnZ2dnUVZ_jOdnZ2d@comcast.com><1190231094.276099.136250@22g2000hsm.googlegroups.com><mailman.781.1190232163.2658.python-list@python.org><1190235678.019823.315850@o80g2000hse.googlegroups.com><mailman.887.1190402873.2658.python-list@python.org><7xejgr68pm.fsf@ruckus.brouhaha.com>	<slrnffetai.ijq.nick@irishsea.home.craig-wood.com>
	<mailman.1031.1190705678.2658.python-list@python.org>
Message-ID: <46F8BDC2.40101@web.de>

Hendrik van Rooyen wrote:
> "Nick Craig-Wood" <ni....d.com> wrote:
> 
>> Passing file descriptors between processes is one of those things I've
>> always meant to have a go with, but the amount of code (in Advanced
>> Programming in the Unix Environment) needed to implement it is rather
>> disconcerting!  A python module to do it would be great!
> 
> I must be missing something here.
> 
> What is the advantage of passing the open file rather than just the
> fully qualified file name and having the other process open the
> file itself?

A "file descriptor" under Unix is not necessarily an open file that you can
find on the hard-disk. It might also be a socket connection or a pipe, or it
might be a file that was opened or created with specific rights or in an
atomic step (like temporary files).

Many things are (or look like or behave like) files in Unix, that's one of its
real beauties.

Stefan


From steveo at syslang.net  Fri Sep 21 11:07:23 2007
From: steveo at syslang.net (Steven W. Orr)
Date: Fri, 21 Sep 2007 11:07:23 -0400 (EDT)
Subject: An Editor that Skips to the End of a Def
In-Reply-To: <87hclpjm3a.fsf@rudin.co.uk>
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk>
Message-ID: <alpine.LFD.0.9999.0709211100280.759@saturn.syslang.net>

On Thursday, Sep 20th 2007 at 18:14 +0100, quoth Paul Rudin:

=>"W. Watson" <wolf_tracks at invalid.com> writes:
=>
=>> Thanks, but no thanks. The learning curve is way too steep.
=>
=>Up to you but, these days emacs comes with all sorts of
=>pointing-clicky-menu-y type things - you don't really have to learn
=>anything to get started.
=>
=>(It even gives useful advice on top-posting if you use it as a news
=>client :/)

Vuts det? Iz no longer Editor Mit Aggravating Control Sequencez? ;-)

-- 
Time flies like the wind. Fruit flies like a banana. Stranger things have  .0.
happened but none stranger than this. Does your driver's license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren't a hypothetical question?
steveo at syslang.net


From bj_666 at gmx.net  Sat Sep  1 15:53:47 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 1 Sep 2007 19:53:47 GMT
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
	<1i3ob5k.dm3jmoqx1z68N%aleax@mac.com>
	<mailman.282.1188675876.28954.python-list@python.org>
Message-ID: <5jtuabF16jr4U1@mid.uni-berlin.de>

On Sat, 01 Sep 2007 13:44:28 -0600, Michael L Torrie wrote:

> Alex Martelli wrote:
> 
>> is the "one obvious way to do it" (the set(...) is just a simple and
>> powerful optimization -- checking membership in a set is roughly O(1),
>> while checking membership in a list of N items is O(N)...).
> 
> Depending on a how a set is stored, I'd estimate any membership check in
> a set to be O(log N).

Sets are stored as hash tables so membership check is O(1) just like Alex
said.

Ciao,
	Marc 'BlackJack' Rintsch


From mahs at telcopartners.com  Thu Sep 20 19:13:54 2007
From: mahs at telcopartners.com (Michael Spencer)
Date: Thu, 20 Sep 2007 16:13:54 -0700
Subject: I could use some help making this Python code run faster using
	only   Python code.
In-Reply-To: <1190325588.608625.259800@q3g2000prf.googlegroups.com>
References: <1190325588.608625.259800@q3g2000prf.googlegroups.com>
Message-ID: <fcuurr$ta5$1@sea.gmane.org>

Python Maniac wrote:
> I am new to Python however I would like some feedback from those who
> know more about Python than I do at this time.
> 
> def scrambleLine(line):
>     s = ''
>     for c in line:
>         s += chr(ord(c) | 0x80)
>     return s
> 
> def descrambleLine(line):
>     s = ''
>     for c in line:
>         s += chr(ord(c) & 0x7f)
>     return s
> 

Try using str.translate instead - it's usually much faster than a pure python loop:
  >>> scramble = "".join(chr(c | 0x80) for c in range(256))
  >>> "source text".translate(scramble)
  '\xf3\xef\xf5\xf2\xe3\xe5\xa0\xf4\xe5\xf8\xf4'
  >>> descramble = "".join(chr(c & 0x7F) for c in range(256))
  >>> '\xf3\xef\xf5\xf2\xe3\xe5\xa0\xf4\xe5\xf8\xf4'.translate(descramble)
  'source text'
  >>>

You might then do the translation inline e.g., untested:

 > def scrambleFile(fname,action=1):
     translators = {0: descramble, 1: scramble} # defined as above
     try:
         translation_action = translators[action]
     except KeyError:
         raise ValueError("action must be 0 or 1")

 >     if (path.exists(fname)):
...
...
                 for line in f:
                     ff.write(line.translate(translation_action))
...

HTH
Michael



From vriolk at gmail.com  Sat Sep 22 19:11:17 2007
From: vriolk at gmail.com (coldpizza)
Date: Sat, 22 Sep 2007 16:11:17 -0700
Subject: database persistence with mysql, sqlite
Message-ID: <1190502677.970811.181100@22g2000hsm.googlegroups.com>

Hi,

I want to run a database query and then display the first 10 records
on a web page. Then I want to be able to click the 'Next' link on the
page to show the next 10 records, and so on.

My question is how to implement paging, i.e. the 'Next/Prev' NN
records without reestablishing a database connection every time I
click Next/Prev? Is it at all possible with cgi/mod_python?

For example, in a NON-web environment, with sqlite3 and most other
modules, I can establish a database connection once, get a cursor
object on which I run a single 'SELECT * FROM TABLE' statement and
then use cursor.fetchmany(NN) as many times as there are still results
left from the initial query.

How do I do the same for the web? I am not using any high-level
framework. I am looking for a solution at the level of cgi or
mod_python (Python Server Pages under Apache). To call
cursor.fetchmany(NN) over and over I need to pass a handle to the
database connection but how do I keep a reference to the cursor object
across pages? I use mysql and sqlite3 as databases, and I am looking
for an approach that would work with both database types (one at a
time). So far I have successfully used the following modules for
database access: sqlite3, mysqld, and pyodbc.

So far, with mysql I use 'SELECT * FROM TABLE LIMIT L1, L2' where L1
and  L2 define the range for the 'Next' and 'Previous' commands. I
have to run the query every time a click a 'Next/Prev' link. But I am
not sure that this is the best and most efficient way. I suppose using
CURSOR.FETCHMANY(NN) would probably be faster and nicer but how do I
pass an object reference across pages? Is it possible without any
higher-level libraries?

What would be the proper way to do it on a non-enterprise scale?

Would SqlAlchemy or SqlObject make things easier with regard to
database persistence?



From deets at nospam.web.de  Mon Sep 10 15:35:56 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 10 Sep 2007 21:35:56 +0200
Subject: Getting error zipimport.ZipImportError: can't decompress data;
	zlib not available
In-Reply-To: <1189452462.021120.199680@50g2000hsm.googlegroups.com>
References: <1189452462.021120.199680@50g2000hsm.googlegroups.com>
Message-ID: <5klkldF4du6mU2@mid.uni-berlin.de>

shabda raaj schrieb:
> I have a VPS server with fedora 7.
> I wanted to install easy_install on this server, but I got an error
> saying
>  unable to open /usr/lib/ > python2.5/config/Makefile (No such file or
> directory).
> So I installed the latest version of python from source.
> Now when I am trying to install libraries, I am getting an error like,
> "zipimport.ZipImportError: can't decompress data; zlib not available"

You'd better install the python-devel-package of the fedora-python. Then 
the first attempt should work, and you can forget about the 
self-compiled version.


Diez


From gagsl-py2 at yahoo.com.ar  Fri Sep 28 01:09:58 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 28 Sep 2007 02:09:58 -0300
Subject: Asynchronous Messaging
References: <1190807252.731074.141450@k79g2000hse.googlegroups.com>
	<1190819912.344267.52680@50g2000hsm.googlegroups.com>
	<mailman.1119.1190822847.2658.python-list@python.org>
	<1190868212.383316.20990@57g2000hsv.googlegroups.com>
	<mailman.1146.1190874945.2658.python-list@python.org>
	<1190951577.293881.44040@r29g2000hsg.googlegroups.com>
Message-ID: <op.tzclywjyx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Fri, 28 Sep 2007 00:52:57 -0300, wink <wink at saville.com> escribi?:

> Interesting, from the documentation for deque says;
> "Deques support thread-safe, ..." which would seem to
> imply a mutex of some sort would be used. But in
> looking at collectionsmodule.c for 2.5.1 I don't see
> any mutex which would seem to imply there is one
> place else, maybe the GIL, or the documentation is
> incorrect.

Uh, I had never noticed that append/pop claimed to be thread safe. Ok,  
they don't appear to call any Python code, neither Py_DECREF is used, so  
the GIL would make those methods thread safe, I think.
R. Hettinger, any comments?

-- 
Gabriel Genellina



From pavlovevidence at gmail.com  Wed Sep 12 19:41:12 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Wed, 12 Sep 2007 16:41:12 -0700
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <1i4c3p7.1o7gssi1ws1xa2N%aleax@mac.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189604018.520338.162520@57g2000hsv.googlegroups.com>
	<46e7f450$0$12305$426a74cc@news.free.fr>
	<1189608231.151112.147550@y42g2000hsy.googlegroups.com>
	<mailman.444.1189611299.2658.python-list@python.org>
	<1i4bnbp.1l8sr3mjdojghN%aleax@mac.com>
	<1189630374.506503.190690@r34g2000hsd.googlegroups.com>
	<1i4c3p7.1o7gssi1ws1xa2N%aleax@mac.com>
Message-ID: <1189640472.939618.281820@g4g2000hsf.googlegroups.com>

On Sep 12, 7:23 pm, al... at mac.com (Alex Martelli) wrote:
> Carl Banks <pavlovevide... at gmail.com> wrote:
>
>    ...
>
> > How about this?  The decorator could generate a bytecode wrapper that
> > would have the following behavior, where __setlocal__ and
> > __execute_function__ are special forms that are not possible in
> > Python.  (The loops would necessarily be unwrapped in the actual
> > bytecode.)
>
> I'm not entirely sure how you think those "special forms" would work.
>
> Right now, say, if the compiler sees somewhere in your function
>     z = 23
>     print z
> it thereby knows that z is a local name, so it adds a slot to the
> function's locals-array, suppose it's the 11th slot, and generates
> bytecode for "LOAD_FAST 11" and "STORE_FAST 11" to access and bind that
> 'z'.  (The string 'z' is stored in f.func_code.co_varnames but is not
> used for the access or storing, just for debug/reporting purposes; the
> access and storing are very fast because they need no lookup).
>
> If instead it sees a "print z" with no assignment to name z anywhere in
> the function's body, it generates instead bytecode "LOAD_GLOBAL `z`"
> (where the string `z` is actually stored in f.func_code.co_names).  The
> string (variable name) gets looked up in dict f.func_globals each and
> every time that variable is accessed or bound/rebound.

Withdrawn.  For some reason it was in my mind that variables not bound
within in the function would be local.

:|



[snip]
> > This wouldn't be that much slower than just assigning local variables
> > to locals by hand, and it would allow assignments in the
> > straightforward way as well.
>
> The big performance hit comes from the compiler having no clue about
> what you're doing (exactly the crucial hint that "assigning local
> variables by hand" DOES give the compiler;-)

Right.



Carl Banks



From me_zara at dea.spamcon.org  Mon Sep 10 06:27:52 2007
From: me_zara at dea.spamcon.org (Zara)
Date: Mon, 10 Sep 2007 12:27:52 +0200
Subject: Enum class with ToString functionality
References: <1189416537.050002.61120@r34g2000hsd.googlegroups.com>
Message-ID: <1r6ae3tuv8rj19ka3b2tpqsni29v48b7p5@4ax.com>

On Mon, 10 Sep 2007 02:28:57 -0700, bg_ie at yahoo.com wrote:

>Hi,
>
>I have the following class -
>
>class TestOutcomes:
>    PASSED = 0
>    FAILED = 1
>    ABORTED = 2
>
>plus the following code -
>
>testResult = TestOutcomes.PASSED
>
>testResultAsString
>if  testResult == TestOutcomes.PASSED:
>    testResultAsString = "Passed"
>elif testResult == TestOutcomes.FAILED :
>    testResultAsString = "Failed"
>else:
>    testResultAsString = "Aborted"
>
>But it would be much nicer if I had a function to covert to string as
>part of the TestOutcomes class. How would I implement this?
>
 You should implement __str__ (or __repr__) method in your class, 

class TestOutcomes:
    PASSED = 0
    FAILED = 1
    ABORTED = 2

   def __str__(self):
      textResultAsString="Unknown"
      if  testResult == TestOutcomes.PASSED:
         testResultAsString = "Passed"
      elif testResult == TestOutcomes.FAILED :
         testResultAsString = "Failed"
      else:
         testResultAsString = "Aborted"
      return testResultAsString

Regards,

Zara



From per9000 at gmail.com  Mon Sep 24 03:04:07 2007
From: per9000 at gmail.com (per9000)
Date: Mon, 24 Sep 2007 00:04:07 -0700
Subject: annoying stdin/stdout + pipes problem
In-Reply-To: <46f69324$0$90263$14726298@news.sunsite.dk>
References: <1190554821.677666.93530@w3g2000hsg.googlegroups.com>
	<46f69324$0$90263$14726298@news.sunsite.dk>
Message-ID: <1190617447.995633.48480@n39g2000hsh.googlegroups.com>

On 23 Sep, 18:24, Damjan <gdam... at gmail.com> wrote:
> > I want to create a program that reads input from stdio that can prompt
> > a user for input while doing so without getting into problems.
> ...
>
> The trick (which works on Linux for sure) is to open /dev/tty and ask
> question/get input on/from it.
> ...
>
> I'm not usre for other *nix-es, and on Windows this will surelly not work
> --
> damjan

Thanks,

it worked just fine on my Gnu/Linux machine, but I'd really like it to
be independent of OS. Any one else got some idea - or a windows
version of the same?

/Per

--

PS: for the record:
***>cat replace3.py && echo "---" && cat input.txt | python
replace3.py

from sys import stdin, stdout

def censor(foo, bar, input):
    return input.replace(foo, bar)

fp = open('/dev/tty', 'r+')
fp.write('Remove what? ')
i = fp.readline().strip()
fp.write('Replace %s with what? ' %i)
o = fp.readline().strip()
fp.close()

for line in stdin.xreadlines():
    line = censor('foo', 'candy', line)
    line = censor('bar', 'donkey', line)
    line = censor('baz', 'hare rama', line)
    line = censor(i, o, line)
    stdout.write(line)
---
Remove what? black
Replace black with what? beige
candy donkey hare rama
fudonkey donkeyooba xyxxyt
raboof txet
beige knight




From steven.bethard at gmail.com  Fri Sep 28 19:36:02 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 28 Sep 2007 17:36:02 -0600
Subject: Numeric command-line options vs. negative-number arguments
In-Reply-To: <1191021181.401767.41040@n39g2000hsh.googlegroups.com>
References: <1190913250.198794.269530@k79g2000hse.googlegroups.com>
	<fdgpic$ssu$00$1@news.t-online.com>
	<0a6dnQmBPIzuqmHbnZ2dnUVZ_vihnZ2d@comcast.com>
	<87ejgj4lpy.fsf_-_@benfinney.id.au>
	<X5adnVivJZ2wGWHbnZ2dnUVZ_tyknZ2d@comcast.com>
	<87wsub2s4w.fsf@benfinney.id.au>
	<Qo6dnV_HZetrm2DbnZ2dnUVZ_sejnZ2d@comcast.com>
	<1191021181.401767.41040@n39g2000hsh.googlegroups.com>
Message-ID: <8_adnam3nq95EmDbnZ2dnUVZ_qSonZ2d@comcast.com>

Carl Banks wrote:
> On Sep 28, 9:51 am, Steven Bethard <steven.beth... at gmail.com> wrote:
>> It was decided that practicality beats purity here. Arguments with
>> leading hyphens which look numeric but aren't in the parser are
>> interpreted as negative numbers. Arguments with leading hyphens which
>> don't look numeric and aren't in the parser raise errors. Sure, it's not
>> the pure answer, but it's the practical answer: "-123" is much more
>> likely to be a negative number than an option.
> 
> What if (for example) you define a option "-3", and also accept
> numerical arguments on the command line.  Then you could get sudden
> unexpected behavior if you input the wrong number:
> 
> "./hello -1"  works ok.
> "./hello -2"  works ok.
> "./hello -3"  ... whoops, now the negative number is suddenly an
> option.
> 
> Granted, it would be stupid for a program to do that, but it suggests
> to me that it's probably a good idea to treat all negative numbers the
> same.  I.e. if there are any numerical options, then all negative
> numbers are treated as options.  If there are none, then negative
> numbers are treated as numbers.

That's probably a good guideline. Anyone mixing numeric flags with 
negative number arguments is asking for an exception of some sort. ;-) 
I'm going to let it sit for a while and think about it, but I'll 
probably make that change in the next release.

STeVe


From hall.jeff at gmail.com  Sat Sep 29 12:49:37 2007
From: hall.jeff at gmail.com (hall.jeff at gmail.com)
Date: Sat, 29 Sep 2007 16:49:37 -0000
Subject: Program inefficiency?
In-Reply-To: <13fsvsp6p743qba@corp.supernews.com>
References: <1191079347.192272.240540@22g2000hsm.googlegroups.com>
	<13fss68juscn33@corp.supernews.com>
	<1191080844.248426.316340@g4g2000hsf.googlegroups.com>
	<13fsvsp6p743qba@corp.supernews.com>
Message-ID: <1191084577.091823.88960@57g2000hsv.googlegroups.com>

no swaps... memory usage is about 14k (these are small Html files)...
no hard drive cranking away or fan on my laptop going nutty... CPU
usage isn't even pegged... that's what makes me think it's not some
sort of bizarre memory leak... Unfortunately, it also means I'm out of
ideas...



From rafael81 at dif.um.es  Wed Sep 19 12:42:24 2007
From: rafael81 at dif.um.es (Rafael Marin Perez)
Date: Wed, 19 Sep 2007 18:42:24 +0200
Subject: compile for ARM
Message-ID: <1190220144.11755.13.camel@rapema-desktop>

Hello

I'm Rafael Marin, and work as reseacher in University of Murcia (Spain).

I want to install and compile modules of python2.4 in a ARMv5b
architecture.

Any idea?

Thank for your time.
Regards, Rafa.



From nick at craig-wood.com  Mon Sep 24 04:30:11 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Mon, 24 Sep 2007 03:30:11 -0500
Subject: Google and Python
References: <1190228512.627109.308910@n39g2000hsh.googlegroups.com>
	<ufadnRC5BPZm6GzbnZ2dnUVZ_jOdnZ2d@comcast.com>
	<1190231094.276099.136250@22g2000hsm.googlegroups.com>
	<mailman.781.1190232163.2658.python-list@python.org>
	<1190235678.019823.315850@o80g2000hse.googlegroups.com>
	<mailman.887.1190402873.2658.python-list@python.org>
	<7xejgr68pm.fsf@ruckus.brouhaha.com>
Message-ID: <slrnffetai.ijq.nick@irishsea.home.craig-wood.com>

Paul Rubin <http> wrote:
>  David <wizzardx at gmail.com> writes:
> > Another method is for the apps to run continuously and serve on non-80
> > port (or on 80 from another host), and your main web server on port 80
> > reverse proxies to it when appropriate.
> 
>  You can also pass the open sockets around between processes instead of
>  reverse proxying, using the SCM_RIGHTS message on Unix domain sockets
>  under Linux, or some similar mechanism under other Unixes (no idea
>  about Windows).  Python does not currently support this but one of
>  these days I want to get around to writing a patch.

An interesting idea!  Are there any web servers which work like that
at the moment?

Passing file descriptors between processes is one of those things I've
always meant to have a go with, but the amount of code (in Advanced
Programming in the Unix Environment) needed to implement it is rather
disconcerting!  A python module to do it would be great!

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


From aleax at mac.com  Tue Sep 18 01:24:10 2007
From: aleax at mac.com (Alex Martelli)
Date: Mon, 17 Sep 2007 22:24:10 -0700
Subject: can Python be useful as functional?
References: <1190073045.618869.261290@k79g2000hse.googlegroups.com>
	<mailman.696.1190092326.2658.python-list@python.org>
Message-ID: <1i4lvih.8g4kwjijx8e2N%aleax@mac.com>

Rustom Mody <rustompmody at gmail.com> wrote:

> Can someone help? Heres the non-working code
> 
> def si(l):
>     p = l.next()
>     yield p
>     (x for x in si(l) if x % p != 0)
> 
> There should be an yield or return somewhere but cant figure it out

Change last line to

    for x in (x for x in si(l) if x % p != 0): yield x

if you wish.


Alex



From rschroev_nospam_ml at fastmail.fm  Wed Sep 19 04:28:38 2007
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Wed, 19 Sep 2007 08:28:38 GMT
Subject: The meaning of  a = b  in object oriented languages
In-Reply-To: <_4OdnQi5jow61m3bnZ2dnUVZ_tvinZ2d@comcast.com>
References: <1190094057.976729.285120@n39g2000hsh.googlegroups.com>
	<fco0ev$hgj$1@news2.u-psud.fr>
	<s_LHi.111195$C95.5745789@phobos.telenet-ops.be>
	<_4OdnQi5jow61m3bnZ2dnUVZ_tvinZ2d@comcast.com>
Message-ID: <W45Ii.112915$3g4.5343422@phobos.telenet-ops.be>

Lew schreef:
> Roel Schroeven wrote:
>> Laurent Pointal schreef:
>>> Summercool a ?crit :
>>>> The meaning of  a = b  in object oriented languages.
>>>> ====================================================
>>> <zip>
>>>
>>> Oups, reading the subject I thought it was a Xah Lee post.
>> me too ...
> 
> Nah, this dude's all right, so far.  As if my opinion mattered.
> 
> Stay with it, Summercool.  It's what discussion groups are for.
> 
> Here's why the reaction: cross-posting of computer-science-type essays, 
> something Xah Lee does.  But he recycles all his decades-old crap and really 
> doesn't participate in the discussion.  This isn't that at all.

I fully agree and I didn't in any way mean to compare Summercool to Xah 
Lee. My apologies to Summercool if anyone interpreted it that way.

It's just that somehow the subject seems to follow the same template as 
what I've become used to from Xah Lee. I almost skipped reading the post 
because of that. Once I started reading it though, it became immediately 
clear that it was not comparable to Xah Lee's postings in any way, shape 
or form.

-- 
The saddest aspect of life right now is that science gathers knowledge
faster than society gathers wisdom.
   -- Isaac Asimov

Roel Schroeven


From andrewblakeslee at gmail.com  Fri Sep 28 17:27:58 2007
From: andrewblakeslee at gmail.com (AndyB)
Date: Fri, 28 Sep 2007 17:27:58 -0400
Subject: Checking for the existence of Duplicates
Message-ID: <qleLi.81762$Lu.68580@bignews8.bellsouth.net>

I have found a lot of material on removing duplicates from a list, but I 
am trying to find the most efficient way to just check for the existence 
of duplicates in a list.  Here is the best I have come up with so far:

             CheckList = [x[ValIndex] for x in  self.__XRList[z]]
             FilteredList = filter((lambda x:x != 0),CheckList)
             if len(FilteredList) > len(sets.Set(FilteredList)): return 
False

The first statement pulls the slice out of a matrix I need to check.
The filter statement gets rid of zeroes (they don't count as duplicates).
The if statement is the actual duplicates check

This is in a program that generates random numbers to do a brute force 
solve on a sudoku-like puzzle.  Once a certain level of difficulty in 
the puzzle is reached, performance goes off a cliff because the 
duplicate checking code, although fast, is executed so many times.


From rschroev_nospam_ml at fastmail.fm  Sat Sep 22 04:47:36 2007
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Sat, 22 Sep 2007 08:47:36 GMT
Subject: Newbie completely confused
In-Reply-To: <mailman.876.1190392492.2658.python-list@python.org>
References: <mailman.876.1190392492.2658.python-list@python.org>
Message-ID: <IE4Ji.117838$pR1.5801002@phobos.telenet-ops.be>

Jeroen Hegeman schreef:
> ...processing all 2 files found
> --> 1/2: ./test_file0.txt
> Now reading ...
> DEBUG readLines A took 0.093 s
> ...took 8.85717201233 seconds
> --> 2/2: ./test_file0.txt
> Now reading ...
> DEBUG readLines A took 3.917 s
> ...took 12.8725550175 seconds
> 
> So the first time around the file gets read in in ~0.1 seconds, the  
> second time around it needs almost four seconds! As far as I can see  
> this is related to 'something in memory being copied around' since if  
> I replace the 'alternative 1' by the 'alternative 2', basically  
> making sure that my classes are not used, reading time the second  
> time around drops back to normal (= roughly what it is the first pass).

(First, I had to add timing code to ReadClasses: the code you posted 
doesn't include them, and only shows timings for ReadLines.)

Your program uses quite a bit of memory. I guess it gets harder and 
harder to allocate the required amounts of memory.

If I change this line in ReadClasses:

         built_classes[len(built_classes)] = HugeClass(long_line)

to

	dummy = HugeClass(long_line)

then both times the files are read and your data structures are built, 
but after each run the data structure is freed. The result is that both 
runs are equally fast.

Also, if I run the first version (without the dummy) on a computer with 
a bit more memory (1 GiB), it seems there is no problem allocating 
memory: both runs are equally fast.

I'm not sure how to speed things up here... you're doing much processing 
on a lot of small chunks of data. I have a number of observations and 
possible improvements though, and some might even speed things up a bit.

You read the files, but don't use the contents; instead you use 
long_line over and over. I suppose you do that because this is a test, 
not your actual code?

__init__() with nothing (or only return) in it is not useful; better to 
just leave it out.


You have a number of return statements that don't do anything (i.e. they 
return nothing (None actually) at the end of the function). A function 
without return automatically returns None at the end, so it's better to 
leave them out.

Similarly you don't need to call sys.exit(): the script will terminate 
anyway if it reaches the end. Better leave it out.


LongClass.clear() doesn't do anything and isn't called anyway; leave it out.


ModerateClass.__del__() doesn't do anything either. I'm not sure how it 
affects what happens if ModerateClass gets freed, but I suggest you 
don't start messing with __del__() until you have more Python knowledge 
and experience. I'm not sure why you think you need to implement that 
method.
The same goes for HugeClass.__del__(). It does delete self.B4v, but the 
default behavior will do that too. Again, I don't get why you want to 
override the default behavior.


In a number of cases, you use a dict like this:

     built_classes  = {}
     for i in LINES:
         built_classes[len(built_classes)] = ...

So you're using the indices 0, 1, 2, ... as the keys. That's not what 
dictionaries are made for; lists are much better for that:

     built_classes = []
     for i  in LINES:
         built_classes.append(...)


HugeClass.B4v isn't used, so you can safely remove it.


Your readLines() function reads a whole file into memory. If you're 
working with large files, that's not such a good idea. It's better to 
load one line at a time into memory and work on that. I would even 
completely remove readLines() and restructure ReadClasses() like this:

def ReadClasses(filename):
      print 'Now reading ...'

      built_classes = []

      # Open file
      in_file = open(filename, 'r')

      # Read lines and interpret them.
      time_a = time.time()
      for i in in_file:
## This is alternative 1.
          built_classes.append(HugeClass(long_line))
## The next line is alternative 2.
##        built_classes[len(built_classes)] = long_line

      in_file.close()
      time_b = time.time()
      print "DEBUG readClasses took %.3f s" % (time_b - time_a)

Personally I only use 'i' for integer indices (as in 'for i in 
range(10)'); for other use I prefer more descriptive names:

     for line in in_file: ...

But I guess that's up to personal preference. Also you used LINES to 
store the file contents; the convention is that names with all capitals 
are used for constants, not for things that change.


In ProcessList(), you keep the index in a separate variable. Python has 
a trick so you don't have to do that yourself:

     nfiles = len(input_files)
     for file_index, i in enumerate(input_files):
         print "--> %i/%i: %s" % (file_index + 1, nfiles, i)
         ReadClasses(i)


Instead of item0, item1, ... , it's generally better to use a list, so 
you can use item[0], item[1], ...


And finally, John Machin's suggestion looks like a good way to 
restructure that long sequence of conversions and assignments in HugeClass.


-- 
The saddest aspect of life right now is that science gathers knowledge
faster than society gathers wisdom.
   -- Isaac Asimov

Roel Schroeven


From jasondrew72 at gmail.com  Mon Sep 17 09:22:08 2007
From: jasondrew72 at gmail.com (Jason Drew)
Date: Mon, 17 Sep 2007 06:22:08 -0700
Subject: simple regular expression problem
In-Reply-To: <1190034041.796626.66790@n39g2000hsh.googlegroups.com>
References: <1190034041.796626.66790@n39g2000hsh.googlegroups.com>
Message-ID: <1190035328.837246.318920@d55g2000hsg.googlegroups.com>

You just need a one-character addition to your regex:

regex = re.compile(r'<organisatie.*?</organisatie>', re.S)

Note, there is now a question mark (?) after the .*

By default, regular expressions are "greedy" and will grab as much
text as possible when making a match. So your original expression was
grabbing everything between the first opening tag and the last closing
tag. The question mark says, don't be greedy, and you get the
behaviour you need.

This is covered in the documentation for the re module.
http://docs.python.org/lib/module-re.html

Jason

On Sep 17, 9:00 am, duikboot <dijkstra.ar... at gmail.com> wrote:
> Hello,
>
> I am trying to extract a list of strings from a text. I am looking it
> for hours now, googling didn't help either.
> Could you please help me?
>
> >>>s = """ \n<organisatie>\n<Profiel_Id>28996</Profiel_Id>\n</organisatie>\n<organisatie>\n<Profiel_Id>28997</Profiel_Id>\n</organisatie>"""
> >>> regex = re.compile(r'<organisatie.*</organisatie>', re.S)
> >>> L = regex.findall(s)
> >>> print L
>
> ['organisatie>\n<Profiel_Id>28996</Profiel_Id>\n</organisatie>
> \n<organisatie>\n<Profiel_Id>28997</Profiel_Id>\n</organisatie']
>
> I expected:
> [('organisatie>\n<Profiel_Id>28996</Profiel_Id>\n</organisatie>
> \n<organisatie>), (<organisatie>\n<Profiel_Id>28997</Profiel_Id>\n</
> organisatie')]
>
> I must be missing something very obvious.
>
> Greetings Arjen




From tomharding at inbox.com  Mon Sep 17 13:02:31 2007
From: tomharding at inbox.com (Tom Harding)
Date: Mon, 17 Sep 2007 18:02:31 +0100
Subject: Using python to create windows apps that everyone can use?
Message-ID: <000001c7f94c$8a280de0$0202fea9@upstairs>

Hi guys, sorry to post another topic on this, as I am aware that it has
already been posted a few times, but not with specifically what I am looking
for. I want an app that makes a gui interface for python (similar to
Microsoft visual studio or qt designer, not a code based one) and/or an app
that can make this into a .exe that can be opened by any person on any
computer without python installed.

 

I would just love to do this in python and not C++, its so simple and
logical.

 

So basically, the easiest way to do that, please!

 

Thanks,

 

Tom Harding

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From ricaraoz at gmail.com  Tue Sep 18 18:44:10 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Tue, 18 Sep 2007 19:44:10 -0300
Subject: Pseudo-Private Class Attributes
Message-ID: <46F054BA.9050709@bigfoot.com>

That is self.__attributes

Been reading about the reasons to introduce them and am a little
concerned. As far as I understand it if you have a class that inherits
from two other classes which have both the same name for an attribute
then you will have a name clash because all instance attributes "wind up
in the single instance object at the bottom of the class tree".

Now I guess this means that in any real OOP project you'd better use
__attr for all your attributes, because classes are usually meant to be
subclassed and you can never know when you'll be subclassing from two
classes with attributes with the same name, and I guess you can't take
the risk of this happening because when it happens it will be hell to
find out what's going on.

Is this right?




From jura.grozni at gmail.com  Wed Sep 19 05:55:48 2007
From: jura.grozni at gmail.com (azrael)
Date: Wed, 19 Sep 2007 09:55:48 -0000
Subject: Help, I'm going mad with this
In-Reply-To: <fcqkju$7fp$00$1@news.t-online.com>
References: <1190173561.822713.200070@d55g2000hsg.googlegroups.com>
	<fcqkju$7fp$00$1@news.t-online.com>
Message-ID: <1190195748.442539.245200@r29g2000hsg.googlegroups.com>

I didn't found this one. Looks interesting and complex because I ran
away from C to Python because of the developing speed and pointers.
Thanks mate, I'll try it.

Other C implementations I found were much shorter, at least this is
going to be a little challenge. :D



From e.frerich at nord-com.net  Tue Sep 25 16:37:29 2007
From: e.frerich at nord-com.net (Egon Frerich)
Date: Tue, 25 Sep 2007 22:37:29 +0200
Subject: Zope review
In-Reply-To: <54e1e4bc0709220757r5609f19brabadc43f34ae90d8@mail.gmail.com>
References: <1190331847.514475.284200@22g2000hsm.googlegroups.com>	<1190403772.862325.113960@y42g2000hsy.googlegroups.com>	<mailman.901.1190415882.2658.python-list@python.org>	<1190432460.360614.293400@n39g2000hsh.googlegroups.com>
	<54e1e4bc0709220757r5609f19brabadc43f34ae90d8@mail.gmail.com>
Message-ID: <46F97189.20501@freudenberg.ih>

Sean Tierney schrieb:
>>From Twisted's website "Twisted is a networking engine written in
> Python, supporting numerous protocols. It contains a web server,
> numerous chat clients, chat servers, mail servers, and more.
> 
> Given that Zope is also a written in python, supports numerous
> protocols, contains a webserver, has several chat packages available,
> a comparison/contrast would be quite useful.


Zope 3 uses Twisted

Egon


From jscrerar at compuserve.com  Sun Sep 30 10:42:56 2007
From: jscrerar at compuserve.com (Jim)
Date: Sun, 30 Sep 2007 07:42:56 -0700
Subject: Command-line does work when scheduled
In-Reply-To: <mailman.1293.1191120273.2658.python-list@python.org>
References: <1191098074.342460.52130@n39g2000hsh.googlegroups.com>
	<mailman.1289.1191100817.2658.python-list@python.org>
	<1191104269.578536.56470@g4g2000hsf.googlegroups.com>
	<mailman.1291.1191113688.2658.python-list@python.org>
	<1191114246.668635.327080@o80g2000hse.googlegroups.com>
	<mailman.1293.1191120273.2658.python-list@python.org>
Message-ID: <1191163376.067339.34740@d55g2000hsg.googlegroups.com>

On Sep 29, 8:45 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Sat, 29 Sep 2007 22:04:06 -0300, Jim <jscre... at compuserve.com> escribi?:
>
> >> If it works this way, maybe the .py file extension is not correctly
> >> registered.
>
> > Yes, it works this way.
> > How do I register the .py extension correctly?
>
>  From a command line, type:
> assoc .py
> You should get:
> .py=Python.File
> If you get an error, or another thing like py_auto_file:
> assoc .py=Python.File
>
> Then:
> ftype Python.File
> You should get:
> Python.File=c:\path\to\python.exe "%1" %*
> If you don't:
> ftype Python.File=c:\path\to\python.exe "%1" %*
>
> The %* at the end is important: if you created the association by using  
> "Open with...", or selecting Python from the list of installed programs,  
> very likely the command says only "%1" - that is, the script being open,  
> but without any additional arguments.
>
> Better if you have administrative rights to do this tasks.
>
> --
> Gabriel Genellina

I believe I get the correct results as follows:
==============================================
Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

J:\Jim Crerar\mypython\misc>assoc .py
.py=Python.File

J:\Jim Crerar\mypython\misc>ftype Python.File
Python.File="E:\Python25\python.exe" "%1" %*

J:\Jim Crerar\mypython\misc>
===============================================
What else could be wrong?
Thanks,
Jim



From khemkaamit at gmail.com  Wed Sep  5 04:31:49 2007
From: khemkaamit at gmail.com (Amit Khemka)
Date: Wed, 5 Sep 2007 14:01:49 +0530
Subject: Printing lists in columns
In-Reply-To: <1188979665.052672.211110@r34g2000hsd.googlegroups.com>
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<slrnfdqe3t.i4p.hat@se-162.se.wtb.tue.nl>
	<Xns99A17FAC2587duncanbooth@127.0.0.1>
	<1188906767.737741.267350@19g2000hsx.googlegroups.com>
	<Xns99A18F8C528BCduncanbooth@127.0.0.1>
	<1188913394.763871.218660@d55g2000hsg.googlegroups.com>
	<46dd69b1$0$24998$426a74cc@news.free.fr>
	<1188917550.261894.84010@k79g2000hse.googlegroups.com>
	<46ddbb26$0$18672$426a74cc@news.free.fr>
	<1188979665.052672.211110@r34g2000hsd.googlegroups.com>
Message-ID: <1360b7230709050131xf709fe0k8a4f9e46bf525bdb@mail.gmail.com>

On 9/5/07, cjt22 at bath.ac.uk <cjt22 at bath.ac.uk> wrote:
> Thanks guys, I really appreciate it. I have never used google groups
> before and am so impressed with how helpful you all are. It is also lovely
> that none of you mock my little knowledge of Python but just want to
> improve it.

And we are proud of it !

> I have another question in relation to the izip_longest function (I
> persume
> this should be within the same topic).
> Using this funciton, is there a way to manipulate it so that the
> columns can be formated
> tabular i.e. perhaps using something such as str(list).rjust(15)
> because currently the columns
> overlap depending on the strings lengths within each column/list of
> lists. i.e. my output is
> currently like:
>
> bo, daf, da
> pres, ppar, xppc
> magnjklep, *, dsa
> *, *, nbi
>
> But I want it justified, i.e:
>
> bo       ,  daf,  da
> pres     , ppar,  xppc
> magnjklep,    *,  dsa
> *        ,    *,  nbi

You can format the output while "print"ing the table. Have a look at:

http://www.python.org/doc/current/lib/typesseq-strings.html

example:
for tup in  izip_longest(*d, **dict(fillvalue='*')):
    print "%15s, %15s, %15s" %tup   # for a tuple of length 3, you can
generalize it


> I am struggling to understand how the izip_longest function works
> and thus don't really know how it could be manipulated to do the
> above.
> It would be much apprecited if somoene could also explain how
> izip_function
> works as I don't like adding code into my programs which I struggle to
> understand.
> Or perhaps I have to pad out the lists when storing the Strings?
>
> Any help would be much appreciated.

This is an example of "generator" functions, to understand what they
are and how they work you can:
1. web-search for "python generators"
2. have  a look at "itertools" module, for more generators

-- 
----
Amit Khemka
website: www.onyomo.com
wap-site: www.owap.in


From gagsl-py2 at yahoo.com.ar  Mon Sep 17 16:37:44 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 17 Sep 2007 17:37:44 -0300
Subject: Class for custom Tkinter widget--difficulty
References: <5786d$46eedf63$4275d90a$16155@FUSE.NET>
Message-ID: <op.tytfk6ukx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 17 Sep 2007 17:11:03 -0300, Kevin Walzer <kw at codebykevin.com>  
escribi?:

> I'm trying to create a custom Tkinter widget class, and I'm having some
> difficulty getting it set up properly.
>
> The class is called MacToolbar, saved in its own module MacToolbar.py,
> and imported with this statement:
>
> 	import MacToolbar
>
> Here is the relevant portion of the class:
>
> ###relevant class code
>
> class MacToolbar:
>      def __init__(self, master):
>          self.tk.call("package", "require", "macsearchfield")
>          self.tk.call('package', 'require', 'tile')
>
>
>      def create(self):
>          self.baseframe = Tile.Frame(self, master)
>          self.baseframe.pack(side='top', fill='both', expand='no')
>
>
>      def toolbar(self):
>          self.create()
>          self.newframe = Tile.Frame(self.baseframe)
>          self.newframe.pack(fill='both', expand='yes')
>
>          self.buttonframe = Tile.Frame(self.newframe)
>          self.buttonframe.pack(side='top', fill='both', expand = 'yes')
>
>
> I'm a bit confused on how to call a class that is imported via a module.
> Both approaches I try produce errors:
>
> 	self.topframe = MacToolbar.toolbar(self.mainframe)
>   	self.topframe = MacToolbar.MacToolbar.toolbar(self.mainframe)

> [...] I was expecting to be able to use the standard Class.Method  
> notation in
> calling MacToolbar class methods, but it appears that this does not work
> at all: that's what I see in the first error above. Instead I have to
> use Module.Class.Method notation? I've never seen this before.
>
> Can someone point out what I am doing wrong, either in the construction
> of the class, the way it's imported, or in how I'm calling methods?

You have to create an instance, and then you call methods on that instance.
But toolbar() doesn't look like a method; both the create and toolbar  
methods appear to create the toolbar itself; probably you should move all  
that code into __init__.
Perhaps you should inherit from Frame?

Given the kind of mistakes you have, I suggest you read something about  
classes and object orientation in Python. (Maybe you have used a lot of  
classes, but perhaps this is the first class you *design*?)

-- 
Gabriel Genellina



From not_here at no_where.com  Sun Sep  9 12:41:42 2007
From: not_here at no_where.com (Brian)
Date: Sun, 09 Sep 2007 09:41:42 -0700
Subject: python 2.5 problems
Message-ID: <3nVEi.98555$Vk6.66626@newsfe07.phx>

Finally deleted 2.2 and loaded 2.5 (see below), using 
the msi, on my XP partition. Having intermittent system 
crashes. Assumed a corrupt download, so deleted and did 
another download/install. Same problems.

The associated DLLs when XP says that it must shut down 
the idle shell are not consistent.

So is there something not stable about ver 2.5 on XP ?

Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC 
v.1310 32 bit (Intel)] on win32

Thanks very much from my cat and dog.


From khemkaamit at gmail.com  Wed Sep  5 07:22:35 2007
From: khemkaamit at gmail.com (Amit Khemka)
Date: Wed, 5 Sep 2007 16:52:35 +0530
Subject: Looping through File Question
In-Reply-To: <79b79e730709050407m7b13a19eh72f8638ccfa65e81@mail.gmail.com>
References: <1188989934.436165.213680@w3g2000hsg.googlegroups.com>
	<79b79e730709050407m7b13a19eh72f8638ccfa65e81@mail.gmail.com>
Message-ID: <1360b7230709050422s202d3c4dr6d0e0c1b8335d1c3@mail.gmail.com>

On 9/5/07, Francesco Guerrieri <f.guerrieri at gmail.com> wrote:
> On 9/5/07, planetmatt <planetmatt at gmail.com> wrote:
> > I am a Python beginner.  I am trying to loop through a CSV file which
> > I can do.  What I want to change though is for the loop to start at
> > row 2 in the file thus excluding column headers.
> >
> > At present I am using this statement to initiate a loop though the
> > records:
> >
> > for line in f.readlines():
> >
> > How do I start this at row 2?
> >
>
> you can simply call (and maybe throw away) f.readline() a single time before
> looping.
> If the lenght of the first line is fixed, you can also use f.seek to start
> reading from the second row.
>
> francesco

Btw, if you are trying to read a csv file and parse it, you can save
some work  .. have a look at "csv" module !

-- 
----
Amit Khemka
website: www.onyomo.com
wap-site: www.owap.in


From llothar at web.de  Sat Sep  1 06:53:31 2007
From: llothar at web.de (llothar)
Date: Sat, 01 Sep 2007 03:53:31 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188369928.755777.142690@i38g2000prf.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
Message-ID: <1188644011.617040.185520@r29g2000hsg.googlegroups.com>

On 29 Aug., 13:45, Russ <uymqlp... at sneakemail.com> wrote:

> I have not yet personally used it, but I am interested in anything
> that can help to make my programs more reliable. If you are
> programming something that doesn't really need to be correct, than you
> probably don't need it. But if you really need (or want) your software

I'm one of the few (thousand) hard core Eiffel programmers on this
world
and i can tell you that this would not add to much to python. To get
the
benefits of it you need to use it together with a runtime that is
designed
from ground with DBC and a language that is fast enough to be able to
check the contracts, if you don't have the latter all you get is a
better
specification language (which you can write as comments in python).

Learn the Eiffel design way and then add assert statements whereever
you
need them. Works well when i do C/C++ programming and maybe even for
script languages - but i never used it for scripts as i don't see a
real
value here.



From metawilm at gmail.com  Tue Sep 25 13:48:29 2007
From: metawilm at gmail.com (metawilm at gmail.com)
Date: Tue, 25 Sep 2007 10:48:29 -0700
Subject: Nested For and While Statements
In-Reply-To: <1190740057.329424.57230@r29g2000hsg.googlegroups.com>
References: <1190662087.403000.16290@g4g2000hsf.googlegroups.com>
	<fd94av$fj8$1@daisy.noc.ucla.edu>
	<1190664644.936871.57050@57g2000hsv.googlegroups.com>
	<1190701545.148197.191090@o80g2000hse.googlegroups.com>
	<1190740057.329424.57230@r29g2000hsg.googlegroups.com>
Message-ID: <1190742509.262383.137100@o80g2000hse.googlegroups.com>

On Sep 25, 7:07 pm, Zentrader <zentrad... at gmail.com> wrote:
> Note that in list comprehension, [x for x in (1, 2, 3)], the
> for loop allocates memory the same way, but the scope changes so that
> "x" is visible outside the for loop,

How is this different? The variable spilling of list comprehension is
the same as for regular for loops. The (#) and (##) lines below don't
print the same value of j.

>>> for j in range(3):
...   print j, "first loop" (#)
...   for j in range(3):
...     print "     ", j, "2nd loop"
...   print j, "first loop, again?"  (##)


- Willem



From lucaberto at libero.it  Mon Sep 17 03:29:43 2007
From: lucaberto at libero.it (luca72)
Date: Mon, 17 Sep 2007 00:29:43 -0700
Subject: QPicture and Qpainter PyQt4
Message-ID: <1190014183.462244.135560@w3g2000hsg.googlegroups.com>

Hello at all
I have made this small tests:

this is the form implementation:

# -*- coding: utf-8 -*-

"""
Module implementing Form.
"""

from PyQt4.QtGui import QWidget
from PyQt4.QtCore import pyqtSignature
from PyQt4 import *
from disegni import PictureFrame

from Ui_form import Ui_Form

class Form(QWidget, Ui_Form):
    """
    Class documentation goes here.
    """
    def __init__(self, parent = None):
        """
        Constructor
        """
        QWidget.__init__(self, parent)
        self.setupUi(self)

    @pyqtSignature("")
    def on_pushButton_clicked(self):
        """
        Slot documentation goes here.
        """
        # TODO: not implemented yet
        #raise "Not implemented yet"
        #gr = QtGui.QPainter()
        picture = QtGui.QPicture()
        gr = QtGui.QPainter()
        gr.begin(picture)
        gr.setPen(QtGui.QPen(QtCore.Qt.black, 1, QtCore.Qt.SolidLine))
        gr.drawLine(70,100,150,100)
        gr.end()
        picture.save('dis.pic')
        self.frame.update()

and this is the clas that implements the paint event:

from PyQt4.QtGui import QWidget
from PyQt4.QtCore import pyqtSignature
from PyQt4 import *

class PictureFrame(QtGui.QFrame):

  def __init__(self, parent = None):
    QFrame.__init__(self, parent)
    picture = QtGui.QPicture()

  def paintEvent(self, event):
    picture.load('dis.pic')
    gr = QtGui.QPainter()
    gr.begin(self.frame)
    gr.drawPicture(0, 0, picture)
    gr.end()

But nothing is paint.
Can you give me some help

Regards

Luca



From gregturn at mindspring.com  Wed Sep 19 17:11:59 2007
From: gregturn at mindspring.com (Goldfish)
Date: Wed, 19 Sep 2007 14:11:59 -0700
Subject: Spring Python 0.3.0 is released!
In-Reply-To: <1189599938.930862.308330@g4g2000hsf.googlegroups.com>
References: <1189599938.930862.308330@g4g2000hsf.googlegroups.com>
Message-ID: <1190236319.992069.220690@d55g2000hsg.googlegroups.com>

Spring Python 0.3.1 was released today. It contains a quick add-on
feature: DecoratorBasedApplicationContext.

This feature lets you define an IoC container using python code and
decorators instead of an XML flat file. It handles things like
dependency injection and fetches things in order as needed. It also
supports two scopes: PROTOTYPE and SINGLETON.

Get it while its hot!



From jyamada1 at gmail.com  Wed Sep 19 14:04:03 2007
From: jyamada1 at gmail.com (Jason Yamada-Hanff)
Date: Wed, 19 Sep 2007 18:04:03 -0000
Subject: Freetype bindings, finally?
Message-ID: <1190225043.731294.7050@19g2000hsx.googlegroups.com>

Hi all,

I'm working on a project that would benefit very much from Python
Freetype2 bindings (the Fonty Python project).  I don't want to
duplicate efforts and wrap the library again if we don't have to.
Interestingly, it seems like there have been lots of attempts at doing
this.

Generally, there are:
ft2 - http://www.satzbau-gmbh.de/staff/abel/ft2/index.html
   No longer maintained, incomplete, beta, from around the 2.0 days.
Py-freetype - http://indic-computing.sourceforge.net/projects/pyfreetype2.html
    More recent, on Pyrex, last update was in 2003, no longer
maintained, doesn't compile for me

Then, it seems like multiple projects (matplotlib and PIL) have done
their own integration with FT, but maintain that code themselves, for
themselves.  These, of course, are up-to-date and maintained.  Are
there other projects that have also done their own work on FT
bindings?

Ultimately, this means that there is no FreeType2 bindings package
that is up-to-date and generally available, but that the work has been
done multiple times over by individual projects.  I understand that
this is totally the prerogative of each project.  The community,
though, could benefit from having a central package of bindings.  Are
those who have already worked on bindings willing to extract their
work into a separate package?  It would be great to finally have a set
of standard bindings!

Thoughts are welcome.  I am new to the C extension world, so I am
probably missing a whole other level of complexity here.

Thanks,
Jason

p.s. There is a sad message on Freetype's website about this
("Unfortunately, no mature Python bindings for FreeType 2 are
available currently..."), right above its notes about all the other
languages that do have bindings (including Ruby!). :-)



From nospam at non.com  Sat Sep 15 09:14:31 2007
From: nospam at non.com (=?iso-8859-1?b?cultaQ==?=)
Date: Sat, 15 Sep 2007 13:14:31 GMT
Subject: Rename multiple files using names in a text file
References: <QCAGi.159$cz3.82@nntpserver.swip.net>
	<fceoe4$hj2$1@daisy.noc.ucla.edu>
Message-ID: <XUQGi.51$j56.112@nntpserver.swip.net>

Le Fri, 14 Sep 2007 12:52:52 -0700, James Stroud a ?crit:

[...]
> Other than that your strip() is stripping off some whitespace that is 
> part of the name, I really can't see the problem either, but did you try 
> to add in the explicit path? E.g.:

actually, the problem was in "while i <= len(list_jpg_strip)" and i should
have been "while i < len(list_jpg_strip)".

Antoher problem was the name of jpg's files used for testing. A naughty
one was nammed "file.jpg " instead of "file.jpg". So maube, as you saif,
stripping is useless for list of jpg files.
Thanks a lot.
R?mi


From sebastien.lannez at gmail.com  Fri Sep 21 09:08:05 2007
From: sebastien.lannez at gmail.com (sebastien.lannez at gmail.com)
Date: Fri, 21 Sep 2007 13:08:05 -0000
Subject: __contains__() : Bug or Feature ???
Message-ID: <1190380085.770828.19400@o80g2000hse.googlegroups.com>

Hi everybody,

I need to overload the operator in and let him
return an object ... It seems it is not a
behavior Python expect :

>>> class A:
...    def __contains__(self,a):
...        return 'yop'
...
>>> a=A()
>>> print 'toto' in a
True
>>> print a.__contains__('toto')
yop

I don't know if it's a bug or a feature but i
really need this overloading and don't know
how to do it ... Furthermore I can't use
a trick of the kind : a |in| b ... because
my overloaded operator must be called by : a in b ...

Is someone could help me ?



From tim.williams at syniverse.com  Fri Sep  7 06:38:54 2007
From: tim.williams at syniverse.com (Tim Williams)
Date: Fri, 7 Sep 2007 11:38:54 +0100
Subject: why should I learn python
In-Reply-To: <200709061624.10112.brown@esteem.com>
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
	<87zlzzs9by.fsf@wilson.homeunix.com>
	<1189119676.239459.325280@w3g2000hsg.googlegroups.com>
	<200709061624.10112.brown@esteem.com>
Message-ID: <9afea2ac0709070338s38fe6c2eycd9b58ff19516895@mail.gmail.com>

On 07/09/07, Tom Brown <brown at esteem.com> wrote:
> On Thursday 06 September 2007 16:01, windandwaves wrote:
> > Hmmm, thank you all for your replies.  I will do some research on the
> > net (i did some already, but because I am really not much of a
> > programmer, it is often too detailed for me).  I have limited time,
> > but it does sound like something to learn, just for fun and for
> > practical use.  How would you use it in a web development
> > environment?  I mean, in real practical terms.  Could it assist with
> > php? Is it easy to write GUI programs in Python?
>
> Checkout http://www.djangoproject.com/ or http://turbogears.org/ for web
> development. Checkout http://www.riverbankcomputing.co.uk/pyqt/index.php for
> writing GUI programs. There are other options for GUI apps. That is the one I
> use all the time.

Also, check out Karrigell ( www.karrigell.com) .  It will show you
just how easy & fast Python can be for web development.  It has its
own web server, or it can sit behind Apache etc.

HTH :)


From stefan.behnel-n05pAM at web.de  Fri Sep 21 08:52:51 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Fri, 21 Sep 2007 14:52:51 +0200
Subject: An Editor that Skips to the End of a Def
In-Reply-To: <5lhs4pF8bkunU1@mid.individual.net>
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk> <fd0au1$fro$1@lust.ihug.co.nz>
	<5lhs4pF8bkunU1@mid.individual.net>
Message-ID: <46F3BEA3.8080100@web.de>

Bjoern Schliessmann wrote:
> Lawrence D'Oliveiro wrote:
>> After two decades of putting up with vi just to ensure
>> compatibility with every proprietary *nix system I might come
>> across, let me just say ...
>>
>> USE EMACS!
> 
> Nah. Use vim.
> 
>> Oh, and
>> <http://ars.userfriendly.org/cartoons/?id=20070910&mode=classic>.
> 
> Esc-Meta-Alt-Ctrl-Shift? :)

Yep, that's five of them.

Stefan


From Graham.Dumpleton at gmail.com  Thu Sep 13 19:04:17 2007
From: Graham.Dumpleton at gmail.com (Graham Dumpleton)
Date: Thu, 13 Sep 2007 23:04:17 -0000
Subject: lxml + mod_python: cannot unmarshal code objects in restricted
	execution mode
In-Reply-To: <1189688758.587404.139360@r29g2000hsg.googlegroups.com>
References: <1189688758.587404.139360@r29g2000hsg.googlegroups.com>
Message-ID: <1189724657.261461.181420@22g2000hsm.googlegroups.com>

On Sep 13, 11:05 pm, Dmitri Fedoruk <dfedo... at gmail.com> wrote:
> Hello everyone,
>
> I'm developing a mod_python application that is based on XML\XSLT
> transforming.
>
> I used 4Suite libraries for that, but as the speed was unacceptable
> for me, I switched to lxml. Everything became much easier and 10 times
> faster, but I've encountered the subject problem.
>
> In brief - all my data and xslt are stored and transferred in UTF-8.
> With 4Suite everything was fine all the time. With lxml it works fine
> from the console, but inside mod_python it occasionaly dies, ~ one
> time out of three. Strange - the same code with the same data works or
> dies by its own means.
>
> As far as I have found, there was a similar problem with PyXML and
> encodings module, but there was no clear solution.
>
> So, my configuration is the following:
> Python 2.5.1
> Server version: Apache/2.2.4 (FreeBSD)
> mod_python-3.3.1
>
> And the relevant parts of my code are these:
>
> def extApplyXslt(xslt, data, logger ):
>     try:
>         strXslt = urllib2.urlopen(xslt).read()
>         # i have to read the xslt url to the python string
>     except urllib2.HTTPError, e:
>        .......
>     except urllib2.URLError, e:
>        .............
>     try:
>         xslt_parser = etree.XMLParser()
>         xslt_parser.resolvers.add( PrefixResolver("XSLT") )
>
>         # and now I have to use the string; a more elegant solution,
> anyone?
>         f = StringIO(strXslt)
>         xslt_doc = etree.parse(f, xslt_parser)
>
>         # and here where the problem comes
>         transform = etree.XSLT(xslt_doc)
>
>     except Exception, exc:
>         logger.log(logging.CRITICAL, exc.__str__() )
>
>     try:
>       result_tree = transform(data)
>       return etree.tostring(result_tree, 'utf-8')
>     except Exception, exc:
>       print "xslt processing error!", exc.__str__()
>       return ""
>
> It dies with the message 'cannot unmarshal code objects in restricted
> execution mode'. By profiling I detected the point where problem
> occurs:
>  transform = etree.XSLT(xslt_doc)
>
> So, I would be grateful for any suggestions how to get rid of this.
> I'd really like to use lxml. Maybe I should initialize the xslt
> processor in somehow other way?
>
> Thanks in advance,
> Dmitri

Try forcing mod_python to run your code in the first interpreter
instance created by Python.

  PythonInterpreter main_interpreter

If that still doesn't work then you are hitting problems in mod_python
related to how it does GIL management or how the third party package
is implemented and whether it is compatible with use in secondary
Python interpreters. For details see:

If it still doesn't work and your application is a WSGI application
and you aren't using mod_python specific features, only choice at this
point would be to use mod_fastcgi or mod_wsgi instead. If using
mod_wsgi, you would still need to tell it to run your code in first
interpreter instance created by Python.

  WSGIApplicationGroup %{GLOBAL}

For some details on issues related to this problem, see sections
'Python Simplified GIL State API' and 'Multiple Python Sub
Interpreters' in mod_wsgi document:

  http://code.google.com/p/modwsgi/wiki/ApplicationIssues

Graham



From joemystery123 at gmail.com  Sun Sep 23 08:32:28 2007
From: joemystery123 at gmail.com (crybaby)
Date: Sun, 23 Sep 2007 05:32:28 -0700
Subject: newb: Question regarding custom exception
Message-ID: <1190550748.698865.210740@22g2000hsm.googlegroups.com>

Why you specify type and name of the exception in your custom
exceptions,
but not in built in exceptions

    except IOError:
        print "no file by the name ccy_rates*.txt"

    except MyError, e:
                print e.msg

Also, when you do:

try: raise MyError(23)

In "try: MyError(23) ", you are calling MyError class, but actually
get instantiated in except MyError, e: ?



From linuxprog at gmail.com  Mon Sep  3 05:43:27 2007
From: linuxprog at gmail.com (linuxprog)
Date: Mon, 03 Sep 2007 09:43:27 +0000
Subject: SOAP : ZSI error
Message-ID: <46DBD73F.6060003@gmail.com>

hello i need some help with ZSI module
i want to use the web service located here 
www.ebob42.com/cgi-bin/NumberToWordsInDutch.exe/soap/IDutch
the wsdl file : 
http://www.ebob42.com/cgi-bin/NumberToWordsInDutch.exe/wsdl/IDutch
that web service is very simple , the function NumToStr converts numbers 
to dutch words (description 
http://www.xmethods.net/ve2/ViewListing.po?key=uuid:01EF9AE1-6DD3-7317-AFA5-05A8A52FCD56)

i have generated IDutchservice_services with wsdl2py
here is my code :

import IDutchservice_services
soap = 
IDutchservice_services.IDutchbindingSOAP("www.ebob42.com/cgi-bin/NumberToWordsInDutch.exe/soap/IDutch")
ok = IDutchservice_services.NumToStr0Request()
ok.Num=5
print soap.NumToStr(ok)

that prints an error RuntimeError: must specify transport or url 
startswith https/http

what's wrong in my script ? thanks


From vijayeee at gmail.com  Wed Sep  5 08:32:18 2007
From: vijayeee at gmail.com (vijayca)
Date: Wed, 05 Sep 2007 12:32:18 -0000
Subject: threads
Message-ID: <1188995538.507987.142250@k79g2000hse.googlegroups.com>

i have written a script that spawns some threads....
all run in parallel....
now i need to stop all the threads once i press a key(example: "\n")
how to do it...



From ldo at geek-central.gen.new_zealand  Fri Sep  7 20:36:44 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 08 Sep 2007 12:36:44 +1200
Subject: Checking if elements are empty
References: <2323A6D37908A847A7C32F1E3662C80E010A0246@dc1ex01.air.org>
	<fbme5d$qa$1@sea.gmane.org>
	<mailman.93.1189003016.2658.python-list@python.org>
	<fbqedh$31g$1@lust.ihug.co.nz>
	<46e115e5$0$7691$9b4e6d93@newsspool2.arcor-online.net>
Message-ID: <fbsqqs$efc$2@lust.ihug.co.nz>

In message <46e115e5$0$7691$9b4e6d93 at newsspool2.arcor-online.net>, Wildemar
Wildenburger wrote:

> Lawrence D'Oliveiro wrote:
>
>> In message <mailman.93.1189003016.2658.python-list at python.org>, Chris
>> Mellon wrote:
>> 
>>> On 9/5/07, Steve Holden <steve at holdenweb.com> wrote:
>>>> Doran, Harold wrote:
>>>>>
>>>>> Is there a way to check if the first element of y is null?
>>>>> 
>>>> len(y[0]) == 0
>>>>
>>> Better spelled as
>>>
>>> if y[0]:
>> 
>> Not a good idea.
> 
> Why not?

Because there is a situation where your version of the test will fail even
if the first element of y is non-null.


From bj_666 at gmx.net  Mon Sep 10 03:39:21 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 10 Sep 2007 07:39:21 GMT
Subject: How to insert in a string @ a index
References: <1189274564.462664.131240@22g2000hsm.googlegroups.com>
	<46e4153a$0$32052$426a74cc@news.free.fr>
	<1189390526.723534.153390@d55g2000hsg.googlegroups.com>
	<1189409390.235999.307160@r29g2000hsg.googlegroups.com>
Message-ID: <5kkal9F3vfqqU2@mid.uni-berlin.de>

On Mon, 10 Sep 2007 00:29:50 -0700, Ant wrote:

> On Sep 10, 3:15 am, "a.m." <lolu... at gmail.com> wrote:
>> Thanks guys for you help. I ended up doing this way (for the
>> records)...
>>
>> t1 = "hello world hello. hello. \nwhy world hello"
> ...
> 
> Another approach may be to use the re module's sub function:
> 
> import re
> 
> t1 = 'hello world hello. hello. \nwhy world hello'
> 
> def matchHandler(match):
>     if <test here>:
>        return "XYZ" + match.group(0)
>     else:
>        return match.group(0)
> 
> re.sub(keyword, matchHandler, t1)

This doesn't work because according to the OP not all 'hello's are
keywords.  It seems to depend on the position if it's a keyword or not.

Ciao,
	Marc 'BlackJack' Rintsch


From paul at boddie.org.uk  Tue Sep 18 07:46:49 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Tue, 18 Sep 2007 04:46:49 -0700
Subject: Extracting xml from html
In-Reply-To: <1190063681.632965.249020@y42g2000hsy.googlegroups.com>
References: <1190061079.025479.129070@w3g2000hsg.googlegroups.com>
	<1190062919.998077.112810@19g2000hsx.googlegroups.com>
	<1190063681.632965.249020@y42g2000hsy.googlegroups.com>
Message-ID: <1190116009.060004.197470@n39g2000hsh.googlegroups.com>

On 17 Sep, 23:14, kyoso... at gmail.com wrote:
>
> I have lxml installed and I appear to also have libxml2dom installed.
> I know lxml has decent docs, but I don't see much for yours. Is this
> the only place to go:http://www.boddie.org.uk/python/libxml2dom.html
> ?

Unfortunately yes, with regard to online documentation, although the
distribution contains API documentation, and the package has
docstrings for most of the public classes, functions and methods. And
the API is a lot like the PyXML and minidom APIs, too.

Paul



From Brian.McCann at viziant.net  Thu Sep 13 15:16:50 2007
From: Brian.McCann at viziant.net (Brian McCann)
Date: Thu, 13 Sep 2007 15:16:50 -0400
Subject: sys.argv index out of range error
Message-ID: <93066C069973ED448DC2BCEA9C44A7383BE33A@efmailx>

Hi, 
 
I trying to create a bootstrap.sh shell script that takes two command line args that passes them
to two scripts. one script is init.sh  that sets up some environment varilables
the other will be a Python script used as the main build script. the contents of the bootstrap file and init.sh are
I've simplified the scripts as much as I could and still retain the errors
 
bootstrap.sh
#!/bin/sh
cd /home/workspaces
export LANG="en_US.UTF-8"

source init $1
test.py $2
#################################
 
init.sh

#!/bin/sh
WORKSPACE_ROOT="$1";

export JAVA_OPTIONS="-Djava.library.path=$WORKSPACE_ROOT/:$WORKSPACE_ROOT/:$WORKSPACE_ROOT/"
echo "JAVA_OPTIONS="$JAVA_OPTIONS;
 
set PATH="$WORKSPACE_ROOT/vendor/basistech/rlp5.4/rlp/bin/ia32-glibc23-gcc32:$WORKSPACE_ROOT/vendor/basistech/rlp5.4/rlp/bin/ia32-w32-msvc71:$WORKSPACE_ROOT/lib/core:$PATH"


##############################################################################
when I run the bootstrap.sh with two args

$ ./bootstrap.sh  spam   ham

init takes the spam with no problem 

this is the output on the command line

$ ./bootstrap.sh spam ham
JAVA_OPTIONS=-Djava.library.path=spam/:spam/:spam/
Traceback (most recent call last):
  File "./test.py", line 12, in ?
    aaa = sys.argv[1]
IndexError: list index out of range
 
 
This is the test.py script that gets the second arg
######################################
!/usr/bin/python
import string
import os
import sys

filename  = sys.argv[0]
aaa = sys.argv[1]


print aaa
#################################
 
 
If I remove "source init $1" from init.sh and replace it with "init 1$" I get this output which works
$ bootstrap.sh spam ham
JAVA_OPTIONS=-Djava.library.path=spam/:spam/:spam/
ham

what's wrong with  the line "source init $1  ?
 
 
Thanks,
Brian
 
 
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From bdesth.quelquechose at free.quelquepart.fr  Mon Sep  3 23:13:31 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 04 Sep 2007 05:13:31 +0200
Subject: concise code (beginner)
In-Reply-To: <13dsvqrqivtf092@corp.supernews.com>
References: <13dsvqrqivtf092@corp.supernews.com>
Message-ID: <46de8545$0$10566$426a74cc@news.free.fr>

bambam a ?crit :
> I have about 30 pages (10 * 3 pages each) of code like this
> (following). Can anyone suggest a more compact way to
> code the exception handling? If there is an exception, I need
> to continue the loop, and continue the list.
> 
> Steve.
> 
> -----------------------------------
> for dev in devs
>     try:
>         dev.read1()
>     except
>         print exception
>         remove dev from devs


for method_name in ['read1', 'read2', 'read3']:
   for dev in devs:
     try:
       meth = getattr(dev, method_name)
     except AttributeError, e:
       # should not happen, but we want to handle it anyway
       your_code_here()
     else:
       try:
         meth()
       except (SomePossibleException, SomeOtherPossibleException), e:
         print e
         # do what's needed to remove dev from devs
         # paying attention not to screw the looping machinery...

(snip)


From zentraders at gmail.com  Wed Sep 19 10:43:12 2007
From: zentraders at gmail.com (Zentrader)
Date: Wed, 19 Sep 2007 07:43:12 -0700
Subject: Find the ID, but how to select/copy the whole string by ID?
In-Reply-To: <1190209195.493784.133340@q3g2000prf.googlegroups.com>
References: <1190209195.493784.133340@q3g2000prf.googlegroups.com>
Message-ID: <1190212992.394640.257390@q3g2000prf.googlegroups.com>

sourcefile.find(stringID) returns the start location. You can use
print to see this.  You can then slice from start+len(stringID) and
print it out.  That should give you enough info to figure out how to
find and extract to the end of the string tag as well.  There are
other ways to do this, but string.find is the easiest to understand.



From mensanator at aol.com  Mon Sep 10 13:45:31 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: Mon, 10 Sep 2007 10:45:31 -0700
Subject: Modul (%) in python not like in C?
In-Reply-To: <13e9pjoc9rdfrf9@corp.supernews.com>
References: <mailman.294.1189364475.2658.python-list@python.org>
	<TM0Fi.4172$FO2.18@newssvr14.news.prodigy.net>
	<13e9iqhmgofasfb@corp.supernews.com>
	<1189403844.128637.85950@k79g2000hse.googlegroups.com>
	<13e9pjoc9rdfrf9@corp.supernews.com>
Message-ID: <1189446331.405110.291060@o80g2000hse.googlegroups.com>

On Sep 10, 1:38 am, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Sun, 09 Sep 2007 22:57:24 -0700, "mensana... at aol.com"
> <mensana... at aol.com> declaimed the following in comp.lang.python:
>
>
>
> > But, in general, doesn't (-11,-4) also satisfy
> >   x = y *   a +   b
> > -70 = 6 * -11 + (-4)?
>
> > Do you overpay your car loans and wait for a refund?
>
>         As I stated, integer division and modulo are linked... Which is
> "correct" is probably dependent upon the language specifications.

I didn't make an opinion on which was "correct".

> Either
> method allows one to recover the original value from the output of
> divmod.

My point was the need to satisfy x = y * a + b doesn't
explain WHY divmod(-70,6) returns (-12,2) instead of (-11,-4).

>
>         Whether that works in the way you intend is a different matter -- my
> car loans usually have interest factors which are applied per payment by
> payment date, so using modulo (or divmod) is not applicable, one must
> actually build the table of payments one at a time (especially since the
> automatic payments taken from paychecks gets "corrupted" during
> holidays, when paychecks are issued a day or two earlier than normal,
> meaning less interest charges during that period and more applied to
> principle; with more on interest the following week, and less on
> interest).

Ok, poor example. Suppose instead we are slicing a 70 character string
from the right. We certainly CAN'T have 6 12-letter slices, can we?
But we can have 6 11-letter slices with 4 characters left over.

And there are probably examples where (-12,2) would make more sense,
although I can't think of one at the moment.

Again, I'm not saying (-12,2) is wrong, just that the explanation
why it's (-12,2) is wanting since there are cases where (-11,-4)
makes more sense.

> --
>         Wulfraed        Dennis Lee Bieber               KD6MOG
>         wlfr... at ix.netcom.com             wulfr... at bestiaria.com
>                 HTTP://wlfraed.home.netcom.com/
>         (Bestiaria Support Staff:               web-a... at bestiaria.com)
>                 HTTP://www.bestiaria.com/




From bdesth.quelquechose at free.quelquepart.fr  Tue Sep  4 05:56:53 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 04 Sep 2007 11:56:53 +0200
Subject: PythonAlley.com
In-Reply-To: <1189012363.397845.174960@y42g2000hsy.googlegroups.com>
References: <mailman.92.1189002436.2658.python-list@python.org>
	<1189012363.397845.174960@y42g2000hsy.googlegroups.com>
Message-ID: <46def2a5$0$12296$426a34cc@news.free.fr>

dkeeney a ?crit :
(snip)
> The Python community online now seems to have two major segments, the
> c.l.p newsgroup (here),
> and a large selection of blogs.  C.l.p is unmoderated and often
> hostile. 
(snip)
> A moderated forum that gives recognition to the experienced and
> tolerance to newbies would be a good thing.

I'm surprised you find c.l.py an "hostile" place with no "tolerance to 
newbies", since it known for being one of the most friendly and helpful 
newsgroups on the comp.* usenet hierarchy - FWIW, may I quote some lines 
of a recent thread here ?
"""
Thanks guys, I really appreciate it. I have never used google groups
before
and am so impressed with how helpful you all are. It is also lovely
that
none of you mock my little knowledge of Python but just want to
improve it.
"""

Also, please notice there's mailing-list for CS-newbies 
(http://mail.python.org/mailman/listinfo/tutor), and quite a few web 
forums, starting with http://python-forum.org, so I'm not sure a new one 
is really that useful.

My 2 cents...


From deets at nospam.web.de  Mon Sep  3 12:43:51 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 03 Sep 2007 18:43:51 +0200
Subject: TypeError: 'module object is not callable'
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<mailman.315.1188810174.28954.python-list@python.org>
	<46dbd11e$0$6228$426a74cc@news.free.fr>
	<mailman.317.1188812089.28954.python-list@python.org>
	<1188816626.021956.281040@22g2000hsm.googlegroups.com>
	<5k2cjmF1r2aiU1@mid.uni-berlin.de>
	<1188836008.656284.76160@o80g2000hse.googlegroups.com>
Message-ID: <5k2ru7F1srgiU1@mid.uni-berlin.de>

 christophertidy at hotmail.com wrote:

> 
>>
>> The others spottet the error I missed. But I can offer something else:
>>
>> http://dirtsimple.org/2004/12/python-is-not-java.html
>>
>> It's a worthy read for someone coming from Java, needing time to adjust.
>>
>> Diez- Hide quoted text -
>>
>> - Show quoted text -
> 
> That deffinately was a useful read, thanks.
> Thankyou to everyone who sorted these problems for me, I have
> progressed very well
> with this python program throughout the day now.
> 
> I have another little question before I finish today:
> I am currently struggling to use a global variable in my static
> functions. I'll explain further
> 
> Within my main.py file I have
> 
> class Main(object):
>     stepStore = StepStore()
> 
>     @staticmethod
>     def createDepSteps():
>         ....
>         stepStore.addStep([bol7, pre5])
>         .......
> 
>     @staticmethod
>     def processSteps():
>         for step in stepStore.stepList[:]:
>         ......
> 
> Main.createDepSteps()
> Main.processSteps()
> 
> 
> Trying this approach I am getting a error saying with the
> processSteps() method, stepStore is undefined
> To solve this problem I am currently passing in the processSteps()
> parameter a stepStore instance created within createDepSteps()
> but there is surely a way stepStore can be a global attribute which
> can be accessed from both methods?
> Any help would be much appreciated again

You are deeeeep down in javaland again. first of all, with the exception of
factory methods, staticmethods or classmethods usually aren't needed. In
Python, you can define functions directly.

So move the above methods "toplevel", aka out of the class-context. and just
make stepStore a module-global variable.

Then things should work. 

The distinction between staticmethod and classmethod is, that staticmethod
is a "pure" method, something unknown in Java.

the classmethod OTOH is a method that gets the class as first argument
(instead of the instance, as in an instance-method):

class Foo(object):
   @classmethod
   def bar(cls):
       print cls

However: get rid of unnecessary classes. Java is severely limited regarding
the definition of "pure" code, the permanently needed class-context for
e.g. a main-method is absurd - to say the least.

Diez


From xingfukun at 126.com  Wed Sep 19 01:57:07 2007
From: xingfukun at 126.com (Xing)
Date: Wed, 19 Sep 2007 13:57:07 +0800
Subject: Puzzled in the coding of Chinese
References: <1190073045.618869.261290@k79g2000hse.googlegroups.com>,
	<fcoth7$ae0$1@sea.gmane.org>,
	<mailman.729.1190135451.2658.python-list@python.org>,
	<871wcvlwly.fsf@rudin.co.uk>
Message-ID: <200709191357069843001@126.com>

Dear list members,
	I am a newcomer in the world of Python. But I am attracted by Python's power in handling text! Now I apply it to handle Chinese but the Chinese character cann't be displayed on the screen. What displayed on the screen is the 16bits codes. I am so puzzled! I believe this is an easy question to most of python users and an important question to me. Thanks a lot to your help!

	






From fructidor00 at gmail.com  Sun Sep  9 18:02:55 2007
From: fructidor00 at gmail.com (GuillaumeC)
Date: Sun, 09 Sep 2007 22:02:55 -0000
Subject: UnboundLocalError on global variable
In-Reply-To: <mailman.298.1189371097.2658.python-list@python.org>
References: <mailman.298.1189371097.2658.python-list@python.org>
Message-ID: <1189375375.158754.269140@k79g2000hse.googlegroups.com>

> def processLogEntry(entry):
# ADD THIS TO YOUR CODE
    global cmterID_
>
>    revision = int(entry.getRevision())
>    commiter = str(entry.getAuthor())
>    datetime = getTimeStamp(entry.getDate())
>    message = str(entry.getMessage())
>
>    Commiter_[0] = cmterID_ //HERE's THE PROBLEM

The reason why it does not work is that there is an assignment to
cmterID_ in your function - even if it is after the problem. As a
consequence, the bytecode compiler makes this name local, and the name
is unbound. The quick fix is to add the global statement as above.

There is a good explanation here:
http://paddy3118.blogspot.com/2006/07/python-functions-assignments-and-scope.html

May I suggest that you use less global variables, for instance
enclosing your method in a class?



From antroy at gmail.com  Mon Sep 10 03:29:50 2007
From: antroy at gmail.com (Ant)
Date: Mon, 10 Sep 2007 00:29:50 -0700
Subject: How to insert in a string @ a index
In-Reply-To: <1189390526.723534.153390@d55g2000hsg.googlegroups.com>
References: <1189274564.462664.131240@22g2000hsm.googlegroups.com>
	<46e4153a$0$32052$426a74cc@news.free.fr>
	<1189390526.723534.153390@d55g2000hsg.googlegroups.com>
Message-ID: <1189409390.235999.307160@r29g2000hsg.googlegroups.com>

On Sep 10, 3:15 am, "a.m." <lolu... at gmail.com> wrote:
> Thanks guys for you help. I ended up doing this way (for the
> records)...
>
> t1 = "hello world hello. hello. \nwhy world hello"
...

Another approach may be to use the re module's sub function:

import re

t1 = 'hello world hello. hello. \nwhy world hello'

def matchHandler(match):
    if <test here>:
       return "XYZ" + match.group(0)
    else:
       return match.group(0)

re.sub(keyword, matchHandler, t1)

The nice thing about this approach is that you could store keyword:
test_function pairs in a dictionary, and reuse this whole block of
code for arbitrary keywords with arbitrary rules.

--
Ant...



From jura.grozni at gmail.com  Wed Sep 19 03:57:41 2007
From: jura.grozni at gmail.com (azrael)
Date: Wed, 19 Sep 2007 07:57:41 -0000
Subject: help, I'll go crazy
Message-ID: <1190188661.325493.68240@n39g2000hsh.googlegroups.com>

Some time ago I started a thread about the Otsu Threshold. Well I
didn' manage to make any progress to acomplish this task.
I tried to implement it from other Languages including Java and C.

Well, this is the example list.
histogram=[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 1, 0, 2, 0, 0, 2, 1, 2, 0, 1, 3, 3, 3, 3, 1, 3, 1, 3,
5, 2, 3, 3, 3, 6, 3, 4, 5, 4, 9, 6, 11, 6, 10, 3, 11, 9, 9, 12, 22,
18, 34, 22, 28, 32, 25, 34, 38, 34, 54, 65, 106, 160, 167, 203, 282,
364, 446, 637, 816, 1022, 1264, 1456, 1646, 1753, 1845, 1922, 2203,
2231, 1973, 2245, 2369, 2349, 2258, 2130, 2066, 1835, 1640, 1554,
1414, 1179, 1024, 974, 938, 838, 785, 756, 803, 921, 952, 865, 722,
625, 608, 547, 498, 412, 438, 408, 413, 415, 339, 366, 330, 320, 293,
315, 368, 411, 434, 500, 531, 538, 552, 665, 811, 869, 998, 1021,
1075, 1080, 1030, 934, 926, 1074, 942, 941, 1014, 1440, 2966, 5301,
2729, 3400, 5563, 13096, 9068, 6045, 2813, 686, 180]

# var() is from the numpy module
My Example is This
def otsu(hi):
    s=sum(hi)
    border=len(hi)
    for i in range(border):
        if hi[i]!=0:break
    for j in range(border-1,0-1,-1):
        if hi[j] != 0:break
    li=[]
    for l in range(len(hi)):
        hi[l]=float(hi[l])/s
    for k in range(i+1,j+1):
        q1=sum(hi[i:k])
        q2=sum(hi[k:j+1])
        v1=var(hi[i:k])
        v2=var(hi[k:j+1])
        a=q1*v1 + q2*v2
        li.append(a)
    print min(li)
    m,n=li[0],i
    for k in range(len(li)):
        if li[k]>m:
            m=li[k]
            n=k
     return n

This is a Threshold Method that accepts a list like a histogram and
return the optimal threshold value.
As I have been surfing the internet, I found several formulas.

Please, dear comunity, help me.I am desperate, I'll go mad. I can't
bealive it that I can't implement something so simple looking.
For this example list the thresh value should be 218. I know it
because I i tested it on an image in ImageJ, and then I exported the
histogram. If any other examples needed I cant'get you as much as
needed
If needed, I can Paste 3 other algorithms I tried.

Thaks in advance



From rrr at ronadam.com  Sun Sep 23 12:35:59 2007
From: rrr at ronadam.com (Ron Adam)
Date: Sun, 23 Sep 2007 11:35:59 -0500
Subject: Factory function with keyword arguments
In-Reply-To: <13fchhi2mnm5tc8@corp.supernews.com>
References: <13fbl9ertj5es12@corp.supernews.com>	<mailman.938.1190537767.2658.python-list@python.org>
	<13fchhi2mnm5tc8@corp.supernews.com>
Message-ID: <fd64lg$46f$1@sea.gmane.org>



Steven D'Aprano wrote:
> On Sun, 23 Sep 2007 03:55:45 -0500, Ron Adam wrote:
> 
>> Steven D'Aprano wrote:
>>> I'm writing a factory function that needs to use keywords in the
>>> produced function, not the factory. Here's a toy example:
> 
> [snip]
> 
> Thanks everyone who answered, you've given me a lot of good ideas.
> 
> I've run some tests with timeit, and most of the variants given were very 
> close in speed. The one exception was (not surprisingly) my version that 
> builds a tuple, puts it in a list, then converts it to a dict, *before* 
> doing anything useful with it. It was 3-4 times slower than the others.
> 
> George's version, with two definitions of foo(), was the fastest. The 
> second fastest was the variant using exec, which surprised me a lot. I 
> expected exec to be the slowest of the lot. Unfortunately, I doubt that 
> these would scale well as the factory becomes more complicated.

The one with exec (the others less so) will depend on the ratio of how 
often the factory is called vs how often the foo is called.  If the factory 
is called only once, then exec only runs once.  If the factory is called 
every time foo is needed, then it will be much slower.  So  your test needs 
to take into account how the factory function will be used in your program 
also.

Ron



From klove at tax.ok.gov  Tue Sep 25 16:15:05 2007
From: klove at tax.ok.gov (Kenneth Love)
Date: Tue, 25 Sep 2007 15:15:05 -0500
Subject: Overriding Logging Config FileHandler Filename
Message-ID: <005101c7ffb0$c34dc7d0$e6003dcc@worf2>

I have a Python logging config file that contains a RotatingFileHandler
handler.  In the args key, I have hard-coded the log filename.  Everything
works great.

However, I find that I now need to override this filename at application
runtime.  Is there a good way to do this?

Here is a bit of sample code that (hopefully) clarifies my question.

--------------- log.ini -----------------
[loggers]
keys=root,processor

; Lots more stuff here: handlers, formatters, and loggers.......

[handlers]
keys=consoleHandler,fileHandler

[handler_fileHandler]
class=handlers.RotatingFileHandler
level=DEBUG
formatter=standard
args=('D:\Projects\Python\src\log.log', 'a', 99999, 10)

-------------- mymain.py -----------------
import logging.config

logging.config.fileConfig('log.ini')

# TODO: Override log filename with new name (e.g. 'd:\\logs\\mymain.py.log')

log = logging.getLogger('mymain')

log.info('START: mymain.py')
log.info('FINISH: mymain.py')
------------------------------------------

adTHANKSvance,
Kenneth Love

-- 
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Kenneth Love                   |         Oklahoma Tax Commission
DP Programmer/Analyst          |         Information Technology
(405) 522 - 5864               |         http://www.tax.ok.gov/
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- 




From steve at holdenweb.com  Fri Sep  7 22:36:27 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 07 Sep 2007 19:36:27 -0700
Subject: Generating a unique identifier
In-Reply-To: <7xtzq57v64.fsf@ruckus.brouhaha.com>
References: <13e2fgbbpsatm39@corp.supernews.com>	<7x3axq7a8a.fsf@ruckus.brouhaha.com>	<13e3us269f59s7a@corp.supernews.com>	<7xd4wt99yv.fsf@ruckus.brouhaha.com>
	<7xtzq57v64.fsf@ruckus.brouhaha.com>
Message-ID: <fbt1rb$2to$1@sea.gmane.org>

Paul Rubin wrote:
> Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
>> the probability is about exp(-(2**60 / 2*2**160)) = 1/exp(2**101)
> 
> Bah.  Got that backwards and calculated wrong.  The probability of no
> collisions is
> 
>     exp(-(2**60) / (2*2**160)) = exp(-(2**-101)) = approx (1 - 2**-101)
> 
> which is very close to 1.  The probability of collision is about
> 2**-101 which is close to 0.  Proofread first, then post.  I keep
> getting that in the wrong order. 

Right. The words "birthday attack" should have been in the back of your 
mind while you were writing that message.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From kpalamartchouk at gmail.com  Wed Sep 12 07:54:44 2007
From: kpalamartchouk at gmail.com (kpalamartchouk at gmail.com)
Date: Wed, 12 Sep 2007 04:54:44 -0700
Subject: Sea-or-land test
Message-ID: <1189598084.622653.94590@50g2000hsm.googlegroups.com>

Could you advise if there exists a simple package, containing function
that would take geographic coordinates and return information on
whether this point belongs to land or sea? No great accuracy is needed
-- I am interested in just major features, like those seen on coarse
world maps.



From duncan.booth at invalid.invalid  Wed Sep 12 10:15:03 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 12 Sep 2007 14:15:03 GMT
Subject: An ordered dictionary for the Python library?
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<13efnmi4n959a59@corp.supernews.com>
Message-ID: <Xns99A99B272A352duncanbooth@127.0.0.1>

Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> wrote:

> In fact, I'm not sure what people mean by ordered dicts. I assume they
> mean the keys are ordered, not the values. But ordered by what?
> Insertion order? Modification order? Alphabetical order? 

All of the above at different times. Usually I think they mean original 
insertion order, I'd more often like modification order though.

Insertion order can certainly be useful: any situation where you currently 
keep items in a list because the original order is important but also copy 
them into a dictionary or set because you need fast lookup. 
e.g. if you want only unique items out of a list but need to preserve order 
of first occurrence.

Another example would be uml->code round tripping: you parse in an existing 
file containing method definitions, then update the method definitions from 
a UML model and write the file out again: ArchGenXML does exactly that, but 
last I looked the methods were written out in whatever order the dictionary 
stored them which really messes up version control. It really should 
preserve the order that methods appeared in the file.

Modification order would be great for a cache. Touch items whenever they 
are referenced and then whenever the cache gets too big just pop the oldest 
until you get back to the desired size.

Alphabetical or other sorted order when you want to get smallest/largest or 
next smaller/larger then a specific item. I don't agree you necessarily 
mean ordered by key rather than value, I think you could specify any 
sortkey and expect updating the value to restore the ordering. Maybe if you 
are recording some stats and want to regularly output the top 10?


From robert.schweikert at mathworks.com  Thu Sep 20 15:23:52 2007
From: robert.schweikert at mathworks.com (Robert Schweikert)
Date: Thu, 20 Sep 2007 15:23:52 -0400
Subject: validating parser
Message-ID: <fcuhc8$at5$1@fred.mathworks.com>

Is there a Python module which will do XSD validation?

Thanks,
Robert
-- 
Robert Schweikert                       MAY THE SOURCE BE WITH YOU
(robert.schweikert at mathworks.com)                 LINUX




From steve at holdenweb.com  Fri Sep 21 13:38:20 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 21 Sep 2007 13:38:20 -0400
Subject: xml-rpc timeout
In-Reply-To: <2_WdnTQ86eZNY27bnZ2dnUVZ_jCdnZ2d@comcast.com>
References: <2_WdnTQ86eZNY27bnZ2dnUVZ_jCdnZ2d@comcast.com>
Message-ID: <fd0vid$7sg$1@sea.gmane.org>

Jd wrote:
> Hi
>    I have a multi-threaded application. For certain operations to the
> server, I would like to explicitly set timeout so that I get correct
> status from the call and not timed out exception.
>    Does anyone know how to go about doing it ?
> 
The easiest way is to use socket.setdefaulttimeout() to establish a 
longer timeout period for all sockets, I guess. It's difficult to 
establish different timeouts for individual sockets when they aren't 
opened directly by your own code (though each socket does also have a 
method to set its timeout period).

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From gnewsg at gmail.com  Sun Sep  9 11:48:38 2007
From: gnewsg at gmail.com (billiejoex)
Date: Sun, 09 Sep 2007 08:48:38 -0700
Subject: os.sep and os.path.sep
Message-ID: <1189352918.534864.195850@g4g2000hsf.googlegroups.com>

>>> import os
>>> hasattr(os, 'sep')
True
>>> hasattr(os.path, 'sep')
True

By chance I noticed it.
Are there differences (I think not...)?
IMHO, if there are no differences os.path.sep should be removed since
it may be confusing.



From jeff at jmcneil.net  Thu Sep 27 17:08:17 2007
From: jeff at jmcneil.net (Jeff McNeil)
Date: Thu, 27 Sep 2007 17:08:17 -0400
Subject: How to Catch Errors in SimpleXMLRPCServer
In-Reply-To: <1190926533.435603.245530@o80g2000hse.googlegroups.com>
References: <1190921745.575519.53560@y42g2000hsy.googlegroups.com>
	<mailman.1184.1190922958.2658.python-list@python.org>
	<1190926533.435603.245530@o80g2000hse.googlegroups.com>
Message-ID: <82d28c40709271408m162ff9b4v4aa654a0eb48e053@mail.gmail.com>

Yeah, that code was out of memory and I didn't test it, my apologies.
Need to actually return a value from _dispatch.

class MyCalls(object):
   def _dispatch(self, method, args):
       try:
           return getattr(self, method)(*args)
       except:
           handle_logging()

server = SimpleXMLRPCServer(("localhost", 8000))
server.register_instance(MyCalls())
server.serve_forever()

-Jeff


On 9/27

On 9/27/07, gregpinero at gmail.com <gregpinero at gmail.com> wrote:
> On Sep 27, 3:55 pm, "Jeff McNeil" <j... at jmcneil.net> wrote:
> > Instead of register_function, use register_instance and provide a
> > _dispatch method in that instance that handles your exception logging.
> >
> > Pseudo:
> >
> > class MyCalls(object):
> >     def _dispatch(self, method, args):
> >         try:
> >             self.getattr(self, method)(*args)
> >         except:
> >             handle_logging()
> >
> > server = SimpleXMLRPCServer(("localhost", 8000))
> > server.register_instance(MyCalls())
> > server.serve_forever()
> >
> > There might be an easier way... but this works for me.
>
> I wonder if there is something wrong with that.  I get this error on
> calling ever method:
>
> Fault 1: 'exceptions.TypeError:cannot marshal None unless allow_none
> is enabled' but I can't see anywhere None would be coming from.
>
> -Greg
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From gagsl-py2 at yahoo.com.ar  Tue Sep 25 23:09:49 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 26 Sep 2007 00:09:49 -0300
Subject: Nested For and While Statements
References: <1190662087.403000.16290@g4g2000hsf.googlegroups.com>
	<fd94av$fj8$1@daisy.noc.ucla.edu>
	<1190664644.936871.57050@57g2000hsv.googlegroups.com>
	<1190701545.148197.191090@o80g2000hse.googlegroups.com>
	<1190740057.329424.57230@r29g2000hsg.googlegroups.com>
	<1190742509.262383.137100@o80g2000hse.googlegroups.com>
Message-ID: <op.ty8q2nzmx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 25 Sep 2007 14:48:29 -0300, <metawilm at gmail.com> escribi?:

> On Sep 25, 7:07 pm, Zentrader <zentrad... at gmail.com> wrote:
>> Note that in list comprehension, [x for x in (1, 2, 3)], the
>> for loop allocates memory the same way, but the scope changes so that
>> "x" is visible outside the for loop,
>
> How is this different? The variable spilling of list comprehension is
> the same as for regular for loops.

The fact that list comprehensions "leak" its loop variable is an  
unfortunate accident and will be corrected in Python 3.0

> The (#) and (##) lines below don't
> print the same value of j.
>
>>>> for j in range(3):
> ...   print j, "first loop" (#)
> ...   for j in range(3):
> ...     print "     ", j, "2nd loop"
> ...   print j, "first loop, again?"  (##)

Because neither list comprehensions nor for loops start a new scope. j is  
a global here, might be local to the enclosing function if any. Anyway,  
all j's are the same variable.

-- 
Gabriel Genellina



From martin at v.loewis.de  Sun Sep  2 14:45:49 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 02 Sep 2007 20:45:49 +0200
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
In-Reply-To: <46daeaec$0$19889$426a74cc@news.free.fr>
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
	<1188735642.391419.103650@19g2000hsx.googlegroups.com>
	<1188740716.423349.304370@y42g2000hsy.googlegroups.com>
	<1188743299.664137.194760@d55g2000hsg.googlegroups.com>
	<46daeaec$0$19889$426a74cc@news.free.fr>
Message-ID: <46DB04DD.80801@v.loewis.de>

>> (2) it is a interpretation language
> Not quite. It's compiled to byte-code - just like Java (would you call
> Java an 'interpreted language' ?)

Python is not implemented like Java. In Java (at least in HotSpot),
the byte code is further compiled to machine code before execution;
in Python, the byte code is interpreted.

Whether this makes Python an interpreter or a compiler,
I don't know.

Regards,
Martin


From perl4hire at softouch.on.ca  Sun Sep 16 13:23:40 2007
From: perl4hire at softouch.on.ca (Amer Neely)
Date: Sun, 16 Sep 2007 13:23:40 -0400
Subject: Coming from Perl
In-Reply-To: <1189712287.671352.72940@w3g2000hsg.googlegroups.com>
References: <Cv%Fi.198$372.59@read2.cgocable.net>
	<1189712287.671352.72940@w3g2000hsg.googlegroups.com>
Message-ID: <46ED669C.5090304@softouch.on.ca>

Paddy wrote:
> On Sep 13, 1:30 am, Amer Neely <perl4h... at softouch.on.ca> wrote:
>> I'm a complete newbie with Python, but have several years experience
>> with Perl in a web environment.
>>
>> A question I have, if someone here is familiar with Perl, does Python
>> have something like Perl's 'here document'? I've just searched and read
>> some postings on generating HTML but they all seem to refer to various
>> template utilities. Is this the only way, or am I missing something? I'm
>> used to generating X/HTML by hand, which makes the here document in Perl
>> ideal for me. Also, many times a client already existing HTML code that
>> I can use in a script.

> Hi Amer,
> Just as an aside, you might find this helpful:
>   http://wiki.python.org/moin/PerlPhrasebook
> It has perl code with python equivalents/notes.
> 

Hello Paddy,
Thanks for that link - it does look quite useful.

-- 
Amer Neely
w: www.webmechanic.softouch.on.ca/
Perl | MySQL programming for all data entry forms.
"Others make web sites. We make web sites work!"


From http  Wed Sep 19 22:14:39 2007
From: http (Paul Rubin)
Date: 19 Sep 2007 19:14:39 -0700
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<dea92f560709021735l2c72d53ew94410fcb33b9b50b@mail.gmail.com>
	<mailman.303.1188779927.28954.python-list@python.org>
	<1190164166.378500.155990@o80g2000hse.googlegroups.com>
	<1190241711.344058.238380@57g2000hsv.googlegroups.com>
	<1190242799.954176.279440@22g2000hsm.googlegroups.com>
Message-ID: <7xps0ew0a8.fsf@ruckus.brouhaha.com>

TheFlyingDutchman <zzbbaadd at aol.com> writes:
> The very fastest Intel processor of the last 1990's that I found came
> out in October 1999 and had a speed around 783Mhz. Current fastest
> processors are something like 3.74 Ghz, with larger caches. Memory is
> also faster and larger. It appears that someone running a non-GIL
> implementation of CPython today would have significantly faster
> performance than a GIL CPython implementation of the late 1990's.
> Correct me if I am wrong, but it seems that saying non-GIL CPython is
> too slow, while once valid, has become invalid due to the increase in
> computing power that has taken place.

This reasoning is invalid.  For one thing, disk and memory sizes and
network bandwith have increased by a much larger factor than CPU speed
since the late 1990's.  A big disk drive in 1999 was maybe 20gb; today
it's 750gb, almost 40x larger, way outstripping the 5x cpu mhz
increase.  A fast business network connection was a 1.4 mbit/sec T-1
line, today it's often 100 mbit or more, again far oustripping CPU
mhz.  If Python was just fast enough to firewall your T1 net
connection or index your 20gb hard drive in 1999, it's way too slow to
do the same with today's net connections and hard drives, just because
of that change in the hardware landscape.  We have just about stopped
seeing increases in cpu mhz: that 3.74ghz speed was probably reached a
couple years ago.  We get cpu speed increases now through parallelism,
not mhz.  Intel and AMD both have 4-core cpu's now and Intel has a
16-core chip coming.  Python is at a serious disadvantage compared
with other languages if the other languages keep up with developments
and Python does not.

Also, Python in the late 90's was pitched as a "scripting language",
intended for small throwaway tasks, while today it's used for complex
applications, and the language has evolved accordingly.  CPython is
way behind the times, not only from the GIL, but because its slow
bytecode interpreter, its non-compacting GC, etc.  The platitude that
performance doesn't matter, that programmer time is more valuable than
machine time, etc. is at best an excuse for laziness.  And more and
more often, in the application areas where Python is deployed, it's
just plain wrong.  Take web servers: a big site like Google has
something like a half million of them.  Even the comparatively wimpy
site where I work has a couple thousand.  If each server uses 150
watts of power (plus air conditioning), then if making the software 2x
faster lets us shut down 1000 of them, the savings in electricity
bills alone is larger than my salary.  Of course that doesn't include
environmental benefits, hardware and hosting costs, the costs and
headaches of administering that many boxes, etc.  For a lot of Python
users, significant speedups are a huge win.

However, I don't think fixing CPython (through GIL removal or anything
else) is the answer, and Jython isn't the answer either.  Python's
future is in PyPy, or should be.  Why would a self-respecting Python
implementation be written in (yikes) C or (yucch) Java, if it can be
written in Python?  So I hope that PyPy's future directions include
true parallelism.


From rcdailey at gmail.com  Tue Sep 25 23:32:05 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Tue, 25 Sep 2007 22:32:05 -0500
Subject: Invoking python through C++: How to?
In-Reply-To: <op.ty8q7watx6zn5v@gabriel2.softlabbsas.com.ar>
References: <496954360709251010q159199a4h9dd2b0e2ecad7a01@mail.gmail.com>
	<op.ty8q7watx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <496954360709252032j1298b259l54659b3bfc7c2a37@mail.gmail.com>

On 9/25/07, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>
> If you don't want to "share" objects between Python and C++, that's the
> simplest way.
> Or, look at the document "Extending and Embedding the Python Interpreter"
> <http://docs.python.org/ext/ext.html>
>
> --
> Gabriel Genellina


Thanks.
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From robin at reportlab.com  Fri Sep 28 07:50:54 2007
From: robin at reportlab.com (Robin Becker)
Date: Fri, 28 Sep 2007 12:50:54 +0100
Subject: recipient validation with smtplib
In-Reply-To: <9afea2ac0709280433n361ce4fx2a26a05de2b1b1ae@mail.gmail.com>
References: <46FCE387.9070601@chamonix.reportlab.co.uk>
	<9afea2ac0709280433n361ce4fx2a26a05de2b1b1ae@mail.gmail.com>
Message-ID: <46FCEA9E.3030700@chamonix.reportlab.co.uk>

Tim Williams wrote:
> On 28/09/2007, Robin Becker <robin at reportlab.com> wrote:
>> Is there a way to use smtplib to get recipient validation. I can use smtplib
>> quite happily to send emails using the locahost's sendmail, but sendmail is just
>>  fire and forget, so some bad addresses eg idiot at www.dingo.zzz don't cause any
>> error in the sending application. I know some smtp setups do enforce recipient
>> validation, but it doesn't seem terribly easy to do this with sendmail. I
>> wondered if there were some way to do this in python?
> 
> There is no way of  validating *every* email address you send to using
> SMTP alone.   Some servers accept every address and bounce later - as
> you have found out. So for the purpose of the SMTP client, or relaying
> server,  the address is valid at sending time to those servers.
> 
> Checking DNS for MX records is a possibility for removing some bad
> addresses, but it's not fool proof as the RFCs don't require MX
> records to exist for a domain to be able to receive email.  If no MX
> records are present, one (and only one!) IP address returned from the
> domain's A record(s) should be tried.
> 
> HTH :)
Thanks, it's at least ammunition for me to say it cannot easily be done. I found 
this milter

http://www.jmaimon.com/sendmail/callahead-milter/

but I think this will cause every send to be checked which is probably not what 
we need.
-- 
Robin Becker



From gagsl-py2 at yahoo.com.ar  Wed Sep  5 19:46:09 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 05 Sep 2007 20:46:09 -0300
Subject: Sort of an odd way to debug...
References: <1188933503.704007.285590@22g2000hsm.googlegroups.com>
	<1i3xrwm.ah5pxyzzlxnaN%aleax@mac.com>
Message-ID: <op.tx7ga7c6x6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 05 Sep 2007 02:15:52 -0300, Alex Martelli <aleax at mac.com> escribi?:

> xkenneth <xkenneth at gmail.com> wrote:
>    ...
>> What I'd like to do, is define a base class. This base class would
>> have a function, that gets called every time another function is
>> called (regardless of whether in the base class or a derived class),
>> and prints the doc string of each function whenever it's called. I'd
>> like to be able to do this without explicitly specifying the function
>> inside all of the other functions of a base class or derived class.
>
> So you need to write a metaclass that wraps every function attribute of
> the class into a wrapper performing such prints as you desire. [...]
>
> import inspect
> class MetaWrapFunctions(type):
>     def __init__(cls, name, bases, attrs):
>         for k, f in attrs.iteritems():
>             if inspect.isfunction(f):
>                 attrs[k] = make_printing_wrapper(f)
>         type.__init__(cls, name, bases, attrs)
>
> Should behave as you described.  I have not tested the code I'm
> suggesting (so there might be some errors of detail) but the general
> idea should work.

After playing a bit with the code I found a problem, __init__ is too late,  
changes to `attrs` are not reflected in the class namespace. Using __new__  
instead is OK. The metaclass should be then:

import inspect
class MetaWrapFunctions(type):
     def __new__(cls, name, bases, attrs):
         for k, f in attrs.iteritems():
             if inspect.isfunction(f):
                 attrs[k] = make_printing_wrapper(f)
         return super(MetaWrapFunctions, cls).__new__(cls, name, bases,  
attrs)

[another way would be to keep __init__ but using setattr(cls, k,  
wrapper(...)]

-- 
Gabriel Genellina



From mrc2323 at cox.net  Thu Sep 13 17:59:44 2007
From: mrc2323 at cox.net (Michael R. Copeland)
Date: Thu, 13 Sep 2007 14:59:44 -0700
Subject: How to Start
Message-ID: <MPG.215360ba6684d43b9896d5@news.cox.net>

   I've decided that Python is a language/environment I'd like to learn 
(I've been a professional programmer for 45+ years), but I really don't 
know where and how to start!  I have a number of books - and am buying 
some more - but because of the bewildering number of after-market 
packages, environments, and add-ons, I am really quite perplexed about 
starting.  8<{{
   Yes, I could fire up the interactive mode and play with some 
statements...but I consider that sort of thing for programming neophytes 
or experimenting with specific issues.  First, I want to develop a 
simple Windows application, and because of the plethora of "stuff" the 
Python world offers, I don't know where to begin.  
   For example, what basic, easy-to-use interface might I start with to 
build a simple text file parsing and analysis program?  That is, I'd 
like to start with a simple Windows shell that prompts for a file name, 
processes it, and then displays some result.
   I am certainly impressed with the apparent experience and openness of 
the regular players here, but the discussions here (and in 
c.l.p.announce) truly presume knowledge and experience with Python I 
don't yet have.  Yes, for even a very experienced programmer, entering 
the Python world is very daunting - but I want to get started.
   Please advise.  TIA


From carsten at uniqsys.com  Mon Sep 10 11:12:26 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 10 Sep 2007 11:12:26 -0400
Subject: printing list containing unicode string
In-Reply-To: <1189432793.383166.156710@d55g2000hsg.googlegroups.com>
References: <1189432793.383166.156710@d55g2000hsg.googlegroups.com>
Message-ID: <1189437146.7187.7.camel@dot.uniqsys.com>

On Mon, 2007-09-10 at 06:59 -0700, Xah Lee wrote:
> If i have a nested list, where the atoms are unicode strings, e.g.
> 
> # -*- coding: utf-8 -*-
> ttt=[[u"?",u"?"], [u"???"],...]
> print ttt
> 
> how can i print it without getting the u'\u1234' notation?
> i.e. i want it print just like this: [[u"?"], ...]
> 
> I can of course write a loop then for each string use
> "encode("utf-8")", but is there a easier way?

It's not quite clear why you want to do this, but this is how you could
do it:

print repr(ttt).decode("unicode_escape").encode("utf-8")

However, I am getting the impression that this is a "How can I use 'X'
to achieve 'Y'?" question instead of the preferable "How can I achieve
'Y'?" type of question. In other words, printing the repr() of a list
might not be the best solution to reach the actual goal, which you have
not stated.

HTH,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From paul.hankin at gmail.com  Sun Sep 30 19:07:36 2007
From: paul.hankin at gmail.com (Paul Hankin)
Date: Sun, 30 Sep 2007 23:07:36 -0000
Subject: s.split() on multiple separators
In-Reply-To: <1191179790.181227.323480@k79g2000hse.googlegroups.com>
References: <1191160394.870241.171200@w3g2000hsg.googlegroups.com>
	<bkRLi.1723$hI7.1162@newssvr17.news.prodigy.net>
	<1191179790.181227.323480@k79g2000hse.googlegroups.com>
Message-ID: <1191193656.196253.242100@19g2000hsx.googlegroups.com>

On Sep 30, 8:16 pm, mrk... at gmail.com wrote:
> > >  c=' abcde abc cba fdsa bcd '.split()
> > >  dels='ce '
> > >  for j in dels:
> > >    cp=[]
> > >    for i in xrange(0,len(c)-1):
>
> > The "-1" looks like a bug; remember in Python 'stop' bounds
> > are exclusive. The indexes of c are simply xrange(len(c)).
>
> Yep. Just found it out, though this seems a bit counterintuitive to
> me, even if it makes for more elegant code: I forgot about the high
> stop bound.

You made a common mistake of using a loop index instead of iterating
directly.
Instead of:
  for i in xrange(len(c)):
     cp.extend(c[i].split(j))

Just write:
  for words in c:
     cp.extend(words.split(j))

Then you won't make a bounds mistake, and this snippet becomes a LOT
more readable.

(Of course, you're better using re.split instead here, but the
principle is good).

--
Paul Hankin



From gnewsg at gmail.com  Mon Sep 10 21:30:59 2007
From: gnewsg at gmail.com (billiejoex)
Date: Mon, 10 Sep 2007 18:30:59 -0700
Subject: distutils question
Message-ID: <1189474259.573612.61270@57g2000hsv.googlegroups.com>

Hi there,
I'm having problems with creating an installer for a module of mine by
using distutils. I'll try to explain my problem as clear as I can
(sorry but English is not my first language).
This is the structure of my module:

--------------------------------
setup.py
mypackage/
    __init__.py
    module.py
demo/
    script.py
    test/
         test_script.py
test
     test_module.py
--------------------------------

By using distutils in such way a 'mypackage' directory within
'module.py' is created in python's 'site-packages' directory:

from distutils.core import setup
setup(
    ...
    packages = ['mypackage'],
)


The problem is that I can't find a way for including "demo" and "test"
directories (along with files contained in them) into "site-packages/
mypackage" directory.
The only way I found is *moving* 'demo' and 'test' directories into
'mypackage' but I would want to avoid that, if possible.

Could someone point me in the right direction? I passed the entire
night without finding a clue...



From rcdailey at gmail.com  Wed Sep 26 11:51:55 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Wed, 26 Sep 2007 10:51:55 -0500
Subject: Regular Expressions: Can't quite figure this problem out
In-Reply-To: <fdd44b$u1p$1@sea.gmane.org>
References: <496954360709241737o6e42e7efk29886b5631f6ca2e@mail.gmail.com>
	<496954360709241853w6bb6e813ved0ec4fc80304d51@mail.gmail.com>
	<op.ty6tjyfqx6zn5v@gabriel2.softlabbsas.com.ar>
	<496954360709241917m3801e4aavee29cfef7deaf41b@mail.gmail.com>
	<fd9rs6$8b2$1@sea.gmane.org>
	<496954360709241951h6901d60etf2c4b3b5ec759f2a@mail.gmail.com>
	<op.ty6ztgx0x6zn5v@gabriel2.softlabbsas.com.ar>
	<496954360709251421l578b9dfdwcc0e67d293ede1f3@mail.gmail.com>
	<496954360709251516teda6f2dwe8190236029e3688@mail.gmail.com>
	<fdd44b$u1p$1@sea.gmane.org>
Message-ID: <496954360709260851r2c0e1382x29e812484d764920@mail.gmail.com>

Even better! Now I can drop the regular expression that did the same thing
:)

Thanks!

On 9/26/07, Fredrik Lundh <fredrik at pythonware.com> wrote:
>
> Robert Dailey wrote:
>
> > Hmm, ElementTree.tostring() also adds a space between the last character
> > of the element name and the />. Not sure why it is doing this.
>
> ET is commonly used to generate (X)HTML fragments, and that space
> provides partial HTML compatibility.
>
> since the default serializer never generates CDATA sections, it should
> be safe to simply do a text.replace(" />", "/>") on the resulting string.
>
> </F>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From nytrokiss at gmail.com  Sun Sep 30 02:59:42 2007
From: nytrokiss at gmail.com (James Matthews)
Date: Sat, 29 Sep 2007 23:59:42 -0700
Subject: New to python
In-Reply-To: <46ff326e$0$17745$9b622d9e@news.freenet.de>
References: <1191126010.260942.89230@y42g2000hsy.googlegroups.com>
	<46ff326e$0$17745$9b622d9e@news.freenet.de>
Message-ID: <8a6b8e350709292359h1710bb13je8f146835a472913@mail.gmail.com>

Both are good however when looking for a book i would recommend core python
programming version 2! Enjoy OOP

On 30 Sep 2007 05:21:50 GMT, Stargaming <stargaming at gmail.com> wrote:
>
> On Sat, 29 Sep 2007 21:20:10 -0700, Googy wrote:
>
> > I am new to python...
> >
> > The programming language i know well is C Can any one recommend me the
> > good ebook for beginners. I have loads of ebooks but i am not able to
> > decide which to start with which book. Also i am learning XML so later
> > on i can switch to books on Python and XML but initially which book to
> > read??
> >
> > Please help...
>
> Generically, `A byte of Python`_ and `Dive into Python`_ are pretty
> common. ABOP has a few comments for C programmers as well, AFAIK.
>
> If you already got a few (e)books, you should perhaps just look through
> all of them and then, sequentially, read them.
>
> .. _A byte of Python: http://www.byteofpython.info/download/
> .. _Dive into Python: http://www.diveintopython.org/
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
http://www.goldwatches.com/mens/cufflinks.html
http://www.jewelerslounge.com
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From sbellon at sbellon.de  Fri Sep 28 16:56:03 2007
From: sbellon at sbellon.de (Stefan Bellon)
Date: Fri, 28 Sep 2007 22:56:03 +0200
Subject: List search
References: <eafb6$46fd68a3$4275d90a$4234@FUSE.NET>
Message-ID: <20070928225603.20575a72@cube.tz.axivion.com>

On Fri, 28 Sep, Kevin Walzer wrote:

> I'm having a problem with searching a list. Here's my code:
> 
> mylist = ['x11', 'x11-wm', 'x11-system']
> 
> for line in mylist:
> 	if 'x11' in line:
> 		print line

Just compare for equality:

       if line == 'x11':

or

print "\n".join(x for x in mylist if x == 'x11')

-- 
Stefan Bellon


From ptmcg at austin.rr.com  Tue Sep 25 11:14:02 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Tue, 25 Sep 2007 08:14:02 -0700
Subject: Regular Expressions: Can't quite figure this problem out
In-Reply-To: <mailman.1026.1190694227.2658.python-list@python.org>
References: <496954360709241737o6e42e7efk29886b5631f6ca2e@mail.gmail.com>
	<a49e45f50709241827i107d0acav28431853ef403702@mail.gmail.com>
	<496954360709241853w6bb6e813ved0ec4fc80304d51@mail.gmail.com>
	<op.ty6tjyfqx6zn5v@gabriel2.softlabbsas.com.ar>
	<496954360709241917m3801e4aavee29cfef7deaf41b@mail.gmail.com>
	<fd9rs6$8b2$1@sea.gmane.org>
	<496954360709241951h6901d60etf2c4b3b5ec759f2a@mail.gmail.com>
	<mailman.1026.1190694227.2658.python-list@python.org>
Message-ID: <1190733242.746403.264650@o80g2000hse.googlegroups.com>

On Sep 24, 11:23 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Mon, 24 Sep 2007 23:51:57 -0300, Robert Dailey <rcdai... at gmail.com>  
> escribi?:
>
> > What I meant was that it's not an option because I'm trying to learn  
> > regular
> > expressions. RE is just as built in as anything else.
>
> Ok, let's analyze what you want. You have for instance this text:
> "<action></action>"
> which should become
> "<action/>"
>
> You have to match:
> (opening angle bracket)(any word)(closing angle bracket)(opening angle  
> bracket)(slash)(same word as before)(closing angle bracket)
>
> This translates rather directly into this regular expression:
>
> r"<(\w+)></\1>"
>
> where \w+ means "one or more alphanumeric characters or _", and being  
> surrounded in () creates a group (group number one), which is  
> back-referenced as \1 to express "same word as before"
> The matched text should be replaced by (opening <)(the word  
> found)(slash)(closing >), that is: r"<\1/>"
> Using the sub function in module re:
>
> py> import re
> py> source = """
> ... <root></root>
> ... <root/>
> ... <root><frame type="image"><action></action></frame></root>
> ... <root><frame type="image"><action/></frame></root>
> ... """
> py> print re.sub(r"<(\w+)></\1>", r"<\1/>", source)
>
> <root/>
> <root/>
> <root><frame type="image"><action/></frame></root>
> <root><frame type="image"><action/></frame></root>
>
> Now, a more complex example, involving tags with attributes:
> <frame type="image"></frame>  -->  <frame type="image" />
>
> You have to match:
> (opening angle bracket)(any word)(any sequence of words,spaces,other  
> symbols,but NOT a closing angle bracket)(closing angle bracket)(opening  
> angle bracket)(slash)(same word as before)(closing angle bracket)
>
> r"<(\w+)([^>]*)></\1>"
>
> [^>] means "anything but a >", the * means "may occur many times, maybe  
> zero", and it's enclosed in () to create group 2.
>
> py> source = """
> ... <root></root>
> ... <root><frame type="image"></frame></root>
> ... """
> py> print re.sub(r"<(\w+)([^>]*)></\1>", r"<\1\2 />", source)
>
> <root />
> <root><frame type="image" /></root>
>
> Next step would be to allow whitespace wherever it is legal to appear -  
> left as an exercise to the reader. Hint: use \s*
>
> --
> Gabriel Genellina

And let's hope the OP doesn't have to parse anything truly nasty like:

<esolang:language name="Python" interpreter_prompt=">>>"></
esolang:language>

-- Paul



From zzbbaadd at aol.com  Wed Sep 19 17:01:18 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Wed, 19 Sep 2007 14:01:18 -0700
Subject: Google and Python
In-Reply-To: <mailman.781.1190232163.2658.python-list@python.org>
References: <1190228512.627109.308910@n39g2000hsh.googlegroups.com>
	<ufadnRC5BPZm6GzbnZ2dnUVZ_jOdnZ2d@comcast.com>
	<1190231094.276099.136250@22g2000hsm.googlegroups.com>
	<mailman.781.1190232163.2658.python-list@python.org>
Message-ID: <1190235678.019823.315850@o80g2000hse.googlegroups.com>

On Sep 19, 1:02 pm, Erik Jones <e... at myemma.com> wrote:
> is usually Apache at most sites?
>
> No an http server and application server are two different things.  
> An http server services requests of a web server those requests can  
> be for static files or for services of a local application in which  
> case the request if forwarded on to the application.  An application  
> services requests of an application.  They are separate concepts,  
> often chained, although they are sometimes implemented together.  
> What they are saying here is that they have built a highly optimizing  
> custom web server in C++ that services web requests for services of  
> applications written in any of the three listed languages.  So, yes,  
> in this case it is what is often Apache in other installations.
>
OK, thanks. Would you know what technique the custom web server uses
to invoke a C++ app (ditto for Java and Python) CGI is supposed to be
too slow for large sites.




From sjmachin at lexicon.net  Mon Sep 17 18:07:02 2007
From: sjmachin at lexicon.net (John Machin)
Date: Mon, 17 Sep 2007 15:07:02 -0700
Subject: qa
In-Reply-To: <mailman.674.1190063735.2658.python-list@python.org>
References: <mailman.674.1190063735.2658.python-list@python.org>
Message-ID: <1190066822.258702.158240@g4g2000hsf.googlegroups.com>

On Sep 18, 7:15 am, Shawn Minisall <trekker... at gmail.com> wrote:
> I'm trying to get a space in between these two strings but it's ignoring
> the space in between when it prints.
>
>  >>> string.capwords (string.join([s1 + " " + s2])) * 3
> 'Spam Ni!Spam Ni!Spam Ni!'
>  >>>

-1.  "qa" as a subject heading scarcely invites potential readers to
bother opening up your posting ...
0. Which 2 strings? You have got a space between 'spam' and 'ni'.
1. string.join([ONLY_ONE_element]) is a big fat no-operation.
2. It's ignoring what space when it prints?
3. Break your expression down into simple steps, so that you can see
where you are going wrong, like this:

>>> import string
>>> s1 = 'spam'
>>> s2 = 'ni!'
>>> s3 = s1 + " " + s2
>>> s3
'spam ni!'
>>> list1 = [s3]
>>> list1
['spam ni!']
>>> s4 = string.join(list1)
>>> s4
'spam ni!'
>>> s5 = string.capwords(s4)
>>> s5
'Spam Ni!'
>>> s6 = s5 * 3
>>> s6
'Spam Ni!Spam Ni!Spam Ni!'
>>>

Now: which part(s) of the above are not doing what you expected, and
what did you expect, and what is the basis for your expectation?

4. Almost all of the string module is deprecated -- instead you should
be using methods of string objects. Are you using an old book or
tutorial? If so, throw it away; it's well out of date.

5. capwords breaks the string into words (like the following) which is
a bit silly on a string that you've just laboriously constructed.

>>> def capwords(s):
...     return " ".join(w.capitalize() for w in s.split())
...
>>> capwords('foo bar zot')
'Foo Bar Zot'
>>>

6. What are you actually trying to achieve?




From crcarleRemoveThis at BOGUSsandia.gov  Mon Sep 17 20:01:38 2007
From: crcarleRemoveThis at BOGUSsandia.gov (Chris Carlen)
Date: Mon, 17 Sep 2007 17:01:38 -0700
Subject: Entering strings as user input but interpreting as Python input (sort
	of)
Message-ID: <fcn4h302ikb@news2.newsguy.com>

Hi:

I'm writing a Python program, a hex line editor, which takes in a line 
of input from the user such as:

 >>> cmd = raw_input('-').split()
-e 01 02 "abc def" 03 04
 >>> cmd
['e', '01', '02', '"abc', 'def"', '03', '04']

Trouble is, I don't want to split the quoted part where the space occurs.

So I would prefer the resulting list to contain:

['e', '01', '02', '"abc def"', '03', '04']

Furthermore, if the user entered:

-e 01 02 "abc \"def\"\r\n" 03 04

I would want the quoted part to be interpreted as if I entered it into 
Python itself (recognize escape sequences, and not split at spaces) as:

 >>> s = '"abc \"def\"\r\n"'
 >>> print s
"abc "def"
"
 >>>

In other words, if a quoted string occurs in the user input, I want only 
that part to be treated as a Python string.  Even more horrifying is 
that I want the outer quotes to remain as is (which Python doesn't do, 
of course).

I have begun to solve this problem by winding up writing what amounts to 
a custom split() method (I call it hsplit(), a function) which is a DFA 
that implements some of Python's string lexical analysis.  Code shown below.

The point of this in the context of the hex editor is that the user 
should be able to enter hex bytes without qualifications like "0xXX" but 
rather as simply: "0A 1B 2C" etc. but also be able to input a string 
without having to type in hex ASCII codes.  Hence the following input 
would be valid (the 'e' is the edit command to the editor):

-e 01 02 "a string with newline\n" 3d 4e 5f
-p


Is there a simpler way?

----------------------------------------------------------------
HSTRIP_NONE = 0
HSTRIP_IN_WORD = 1
HSTRIP_IN_QUOTE = 2
HSTRIP_IN_ESC = 3

def hsplit(string):
     lst = []
     word = []
     state = HSTRIP_NONE # not in word
     for c in string:

         if state == HSTRIP_NONE:
             if c == '"':
                 word.append(c)
                 state = HSTRIP_IN_QUOTE
             elif c != ' ':
                 word.append(c)
                 state = HSTRIP_IN_WORD
             # else c == ' ', so pass
         elif state == HSTRIP_IN_QUOTE:
             if c == '"':
                 word.append(c)
                 lst.append(''.join(word))
                 word = []
                 state = HSTRIP_NONE
             elif c == '\\':
                 state = HSTRIP_IN_ESC
             else:
                 word.append(c)
         elif state == HSTRIP_IN_ESC:
             if c == '\\':
                 word.append(c)
                 state = HSTRIP_IN_QUOTE
             elif c == '"':
                 word.append(c)
                 state = HSTRIP_IN_QUOTE
             elif c == 'n':
                 word.append('\n')
                 state = HSTRIP_IN_QUOTE
             else: # c == non escape or quote
		# for unrecognized escape, just put in verbatim
                 word.append('\\')
                 word.append(c)
                 state = HSTRIP_IN_QUOTE
         else: # if state == HSTRIP_IN_WORD
             if c == ' ' or c == '"':
                 lst.append(''.join(word))
                 if c == '"':
                     word = [c]
                     state = HSTRIP_IN_QUOTE
                 else:
                     word = []
                     state = HSTRIP_NONE
             else:
                 word.append(c)
     # this only happens if you run out of chars in string before a 
state change:
     if word: lst.append(''.join(word))
     return lst



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


-- 
Good day!

________________________________________
Christopher R. Carlen
Principal Laser&Electronics Technologist
Sandia National Laboratories CA USA
crcarleRemoveThis at BOGUSsandia.gov
NOTE, delete texts: "RemoveThis" and
"BOGUS" from email address to reply.


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Sep 10 07:53:08 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 10 Sep 2007 13:53:08 +0200
Subject: Python syntax wart
References: <fbvvil$7dj$1@lust.ihug.co.nz> <5khh6nF3i5nuU1@mid.uni-berlin.de>
	<46E390B7.2080808@web.de> <fc0518$aa2$5@lust.ihug.co.nz>
	<5ki2sdF3nr68U1@mid.individual.net> <fc2c52$i1l$3@lust.ihug.co.nz>
	<5kk8p0F3vfqqU1@mid.uni-berlin.de> <fc2t89$rik$4@lust.ihug.co.nz>
	<5kkcmvF3vfqqU3@mid.uni-berlin.de> <fc2uls$shh$2@lust.ihug.co.nz>
Message-ID: <5kkph4F486kdU2@mid.individual.net>

Lawrence D'Oliveiro wrote:
> In message <5kkcmvF3vfqqU3 at mid.uni-berlin.de>, Marc 'BlackJack'

>> I see a tree structure here ...
> 
> Good, you're improving.

Tree structures can't, IMHO, be called two-dimensional. Although,
you can represent them with a two-dimensional graph. If the tree
gets more complex this can become very messy.
 
>> And this is also easily written that way in Python if you don't
>> insist on the line break after the ``if`` or can live with
>> backslashes.
> 
> Which is precisely the point.

You're the first person I see using a complete line just for an "if"
or "for". Is this for tuning the code line count?

Regards,


Bj?rn

-- 
BOFH excuse #194:

We only support a 1200 bps connection.



From tgrav at mac.com  Wed Sep  5 10:07:01 2007
From: tgrav at mac.com (Tommy Grav)
Date: Wed, 5 Sep 2007 10:07:01 -0400
Subject: handling modules in packages
In-Reply-To: <fbmbp3$nm8$1@sea.gmane.org>
References: <619B716A-C1EB-42DF-9702-E288AD04F613@mac.com>
	<fbmbp3$nm8$1@sea.gmane.org>
Message-ID: <384C9792-3923-42C6-8F9C-E3EB19B8811A@mac.com>

>>
> The simplest thing to do would be to have PyAstro.__init__.py  
> import all
> the sub-modules, and define __all__ as the set of names that the  
> package
> should inject into importing modules.
>
> Then you could write (for example)
>
> from PyAstro import numpy, constants, conversion, obsrvations
>
> However if you are simply worried about run-time efficiency then don't
> be: once a module is imported further imports essentially reduce to
> checking that the module is already present in the sys.modules  
> dict, and
> so take almost no time at all.

So am I understanding it right that a second import numpy statement
in a different module (and thus a different namespace) just results in
a binding to the already existing numpy "object"?

Cheers
   Tommy




From stefan.behnel-n05pAM at web.de  Thu Sep 20 07:55:10 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Thu, 20 Sep 2007 13:55:10 +0200
Subject: lxml and identification of elements in source
In-Reply-To: <46f18900$0$5083$ba4acef3@news.orange.fr>
References: <46f18900$0$5083$ba4acef3@news.orange.fr>
Message-ID: <46F25F9E.7010700@web.de>

Laurent Pointal wrote:
> I use lxml to parse a document, modify some elements in the tree, run
> xinclude on it (thanks to Stefan Behnel for the pointer), and finally use
> the data to feed my sax-aware tool.
> 
> To report warnings/errors to the user (not related to XML itself, but to
> things like missing source for a cross-reference by example), is there a
> way to get the source-file and line/column of an element ?
> 
> [note: these informations are available when lxml parse the source, but are
> they kept anywhere in the document tree ?]

The lxml mailing list is a good place to ask these questions - although having
the name come up in c.l.py from time to time makes for some good advertising :)

Elements have a "sourceline" property that returns the line the Element was
parsed from. It returns None if the Element was created through the API. Also,
lines may become meaningless when you merge documents, e.g. xincluded elements
will refer to the line in the xincluded document, not some magically
calculated line in the target document. The column is not stored for an
Element after parsing is finished (no, we can't change that).

You can call getroottree() on an Element to retrieve it's root ElementTree,
which knows about the URL (and other things) in its docinfo property.

Stefan


From garyjefferson123 at gmail.com  Tue Sep 11 12:14:56 2007
From: garyjefferson123 at gmail.com (garyjefferson123 at gmail.com)
Date: Tue, 11 Sep 2007 09:14:56 -0700
Subject: customizing a logging logger
In-Reply-To: <1187412814.493872.325190@j4g2000prf.googlegroups.com>
References: <1187412814.493872.325190@j4g2000prf.googlegroups.com>
Message-ID: <1189527296.426004.17600@19g2000hsx.googlegroups.com>

I think the following question is clearer.

I want to make it so that method1 below can be transformed:

logger = logging.getLogger("somelogger")
class SomeOp:
    def __init__(self, ctx):
        self.ctx = ctx
    def method1(self):
        logger.info("%s: here's a message", self.ctx)
        logger.debug("%s: msg #2", self.ctx)
        v = 'yessir'
        logger.debug("%s: msg #3 %s", self.ctx, v)

into something like:

    def method1(self):
        logger.info("here's a message")
        logger.debug("msg #2")
        v = 'yessir'
        logger.debug("msg #3 %s", v)


What is the best way to do this, so that I don't have to manually put
the self.ctx in the log string in hundreds of different places?

Thanks,
Gary



From steve at holdenweb.com  Fri Sep  7 15:13:05 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 07 Sep 2007 12:13:05 -0700
Subject: unexpected behavior: did i create a pointer?
In-Reply-To: <pan.2007.09.07.10.40.46@REMOVE.THIS.cybersource.com.au>
References: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>	<46e11dfe$0$4517$9b4e6d93@newsspool3.arcor-online.net>
	<pan.2007.09.07.10.40.46@REMOVE.THIS.cybersource.com.au>
Message-ID: <fbs7s2$v8o$1@sea.gmane.org>

Steven D'Aprano wrote:
> On Fri, 07 Sep 2007 11:46:38 +0200, Wildemar Wildenburger wrote:
> 
>> gu wrote:
>>> hi to all!
>>> after two days debugging my code, i've come to the point that the
>>> problem was caused by an unexpected behaviour of python. or by lack of
>>> some information about the program, of course! i've stripped down the
>>> code to reproduce the problem:
>>>
>>> [snip FAQ]
>> Yes, basically you *created* a pointer. That's all that python has:
>> pointers.
> 
> No, you are confusing the underlying C implementation with Python. Python 
> doesn't have any pointers. CPython is implemented with pointers. PyPy, 
> being written entirely in Python, is implemented with Python objects like 
> lists and dicts. Jython, being implemented in Java, probably isn't 
> implemented with pointers either -- although of course the underlying 
> Java compiler might be. IronPython and Python for .Net, I have no idea 
> how they work. Could be magic for all I know. (Probably necromancy.) 
> 
> Naturally, regardless of whether you are using CPython, IronPython, PyPy 
> or some other variety of Python, the objects available to you include 
> ints, floats, strings, lists, dicts, sets and classes... but not pointers.
> 
> Nor does it include "peek" and "poke" commands for reading and writing 
> into random memory locations. Python is not C, and it is not Basic, nor 
> is it Forth or Lisp or assembler, and you shouldn't hammer the round peg 
> of Python objects into the square hole of C pointers.
> 
This seems to be obscuring the real issue for the sake of hammering an 
error in vocabulary. gu said """Yes, basically you *created* a pointer. 
That's all that python has: pointers.""" and you took issue with that, 
ultimately saying """the objects available to you include ints, floats, 
strings, lists, dicts, sets and classes... but not pointers""".

You are both right, and you are also both wrong.

Python does indeed provide a rich set of strongly typed object classes, 
and so clearly to say "Python only has pointers" is strictly an error. 
However, this overlooks the fact that *all* names in Python, and *all* 
items in container objects (lists, tuples, dicts ...) hold references to 
objects.

I mention this because it *is* significant to the semantics of 
assignment. From the point of view of a C programmer Python might 
actually look quite like a language in which all data objects had to be 
malloc'd, and the only variables were pointers to. Assignment (binding) 
in Python creates copies of references to objects, not copies of the 
objects themselves.

I have deliberately omitted discussion of the automatic dereferencing 
that takes place in Python, thereby allowing us to treat names as though 
they contained objects, but the fact remains that names *don't* contain 
objects, they contain references to objects. If you want to regard a 
reference and a pointer as two different things then I guess that's your 
nit to pick. But I don't think the original assertions quite justified 
your scathing remarks about "peek" and "poke".

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From arkanes at gmail.com  Tue Sep  4 15:26:53 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Tue, 4 Sep 2007 14:26:53 -0500
Subject: Sort of an odd way to debug...
In-Reply-To: <1188933503.704007.285590@22g2000hsm.googlegroups.com>
References: <1188933503.704007.285590@22g2000hsm.googlegroups.com>
Message-ID: <4866bea60709041226h741c6774l1fa19177bd329324@mail.gmail.com>

On 9/4/07, xkenneth <xkenneth at gmail.com> wrote:
> All,
>
>     Sorry for the vague topic, but I really didn't know how to
> describe what I want to do. I'd like to almost do a traceback of my
> code for debugging and I thought this would be a really cool way to do
> it if possible.
>
> What I'd like to do, is define a base class. This base class would
> have a function, that gets called every time another function is
> called (regardless of whether in the base class or a derived class),
> and prints the doc string of each function whenever it's called. I'd
> like to be able to do this without explicitly specifying the function
> inside all of the other functions of a base class or derived class.
>
> Here's what I think it would look like:
>
> class Base:
>      __init__(self,debug=False):
>             if debug:
>                 self.debug = debug
>
>      def functionThatAlwaysGetsCalled(self):
>            print self.__docstring__
>
> class Derived(Base):
>     """This function prints something"""
>     def printSometing(something)
>          #ghost function get's called here
>          print something
>
> Output would be:
> This function prints something
> something
>
> Thanks for any help!
>

This approach won't work, because you need cooperation from child
classes to trigger your  printing. A trace function (see sys.settrace)
is probably more useful.


From grante at visi.com  Sat Sep 15 12:25:15 2007
From: grante at visi.com (Grant Edwards)
Date: Sat, 15 Sep 2007 16:25:15 -0000
Subject: how to join array of integers?
References: <1189859762.563599.269270@g4g2000hsf.googlegroups.com>
	<a23effaf0709150551g19c611eqe1c912acf02306d3@mail.gmail.com>
	<46EBE498.9040800@ehas.org>
	<mailman.583.1189872945.2658.python-list@python.org>
Message-ID: <13eo1rb73mg8b77@corp.supernews.com>

On 2007-09-15, Erik Jones <erik at myemma.com> wrote:

>>> print ''.join([str(i) for i in [1,2,3]])
>>
>> It's better to use generator comprehension instead of LC:
>>
>> ",".join(str(i) for i in [1, 2, 3])
>
> Why is that?  That entire expression must be evaluated to obtain the  
> result, so what is the advantage of using a generator comprehension  
> v. a list comprehension?

The generator avoids creating the intermediate list -- it
generates the intermediate values on the fly. For short
sequences it probably doesn't matter much.  For a very long
list it's probably noticable.

-- 
Grant Edwards                   grante             Yow!  Mr and Mrs PED, can I
                                  at               borrow 26.7% of the RAYON
                               visi.com            TEXTILE production of the
                                                   INDONESIAN archipelago?


From cscheit at lstm.uni-erlangen.de  Tue Sep 18 09:58:42 2007
From: cscheit at lstm.uni-erlangen.de (Christoph Scheit)
Date: Tue, 18 Sep 2007 15:58:42 +0200
Subject: Memory Problem
In-Reply-To: <5la11gF71rf0U2@mid.uni-berlin.de>
References: <mailman.710.1190118615.2658.python-list@python.org>
	<5la11gF71rf0U2@mid.uni-berlin.de>
Message-ID: <200709181558.43026.cscheit@lstm.uni-erlangen.de>

On Tuesday 18 September 2007 15:10, Marc 'BlackJack' Rintsch wrote:
> On Tue, 18 Sep 2007 14:06:22 +0200, Christoph Scheit wrote:
> > Then the data is added to a table, which I use for the actual
> > Post-Processing. The table is actually a Class with several "Columns",
> > each column internally being represented by array.
>
> Array or list?

array

More details:
class DBTable:
	# the class DBTable has a list, each list entry referencing a DBColu  bject
	self.cols  = []
        
        self.dict = {, -1} #the dictionary is used to look up if an entry
        # already exists
	
class DBColumn:
	# has a name (string and a datatype (int, float, e.g.) as attribute plus
	self.data = array('f')	# an array of type float

I have to deal with several millions of data, actually I'm trying an example 
with
360 grid points and 10000 time steps, i.e. 3 600 000 entries (and each row 
consits of 4 int and one float)

Of course, the more keys the bigger is the dictionary, but is there a way to 
evaluate the actual size of the dictionary?

Greets and Thanks,

Chris
>
> > # create reader
> > breader = BDBReader("<var>", "<type>", "#")
> >
> > # read data
> > bData = breader.readDB(dbFileList[0])
> >
> > # create table
> > dTab = DBTable(breader.headings, breader.converters, [1,2])
> > addRows(bData, dTab)
> >
> > Before I add a new entry to the table, I check if there is already an
> > entry like this. To do so, I store keys for all the entries with
> > row-number in a dictionary. What about the memory consumption of the
> > dictionary?
>
> The more items you put into the dictionary the more memory it uses.  ;-)
>
> > Here the code for adding a new row to the table:
> >
> > # check if data already exists
> > if (self.keyDict.has_key(key)):
> >         rowIdx = self.keyDict[key]
> >         for i in self.mutableCols:
> >             self.cols[i][rowIdx] += rowData[i]
> >         return
> >
> >  # key is still available - insert row to table
> >  self.keyDict[key] = self.nRows
> >
> >  # insert data to the columns
> >  for i in range(0, self.nCols):
> >      self.cols[i].add(rowData[i])
> >
> >  # add row i and increment number of rows
> >  self.rows.append(DBRow(self, self.nRows))
> >  self.nRows += 1
> >
> > Maybe somebody can help me. If you need, I can give more implementation
> > details.
>
> IMHO That's not enough code and/or description of the data structure(s).
> And you also left out some information like the number of rows/columns and
> the size of the data.
>
> Have you already thought about using a database?
>
> Ciao,
> 	Marc 'BlackJack' Rintsch

-- 

============================
M.Sc. Christoph Scheit
Institute of Fluid Mechanics
FAU Erlangen-Nuremberg
Cauerstrasse 4
D-91058 Erlangen
Phone: +49 9131 85 29508
============================


From x_john at timney.eclipse.co.uk  Tue Sep 11 14:50:33 2007
From: x_john at timney.eclipse.co.uk (John Timney (MVP))
Date: Tue, 11 Sep 2007 19:50:33 +0100
Subject: Car-ac-systems
References: <cd6dnW0Vf8-wOnvbRVnyhwA@eclipse.net.uk><b0ac48a01b8bb8c9c2b92ff03bf0@msnews.microsoft.com><1189532573.728913.306470@g4g2000hsf.googlegroups.com>
	<5ko2rjF4om2bU1@mid.uni-berlin.de>
Message-ID: <fdGdnWvRKpfqfnvbnZ2dneKdnZydnZ2d@eclipse.net.uk>


"Marc 'BlackJack' Rintsch" <bj_666 at gmx.net> wrote in message 
news:5ko2rjF4om2bU1 at mid.uni-berlin.de...
> On Tue, 11 Sep 2007 17:42:53 +0000, Zentrader wrote:
>
>> <snip>
>> What is it about "please do not top-post" that you have difficulty
>> understanding? Or do "MVP"s feel that their time is so much more
>> valuable than anyone else's that they are free to ignore the norms?
>>
>> Who made this the norm?
>
> Common sense and (western) reading habits.
>
>> In my travels through web-land, it appears to be the opposite.
>
> You must travel strange territories.  ;-)
>
>> Don't waste space repeating everything in every post, and it wastes
>> everyone's time by have to go over the same thing again and again.
>
> That's why you trim the quoted part to the minimum to understand what one
> is answering.  Top posting and full quoting wastes time for people who
> want to see the context because context and answer are way apart and in 
> the
> wrong order so one has to scroll back and forth to keep track of the
> discussion.
>
> Ciao,
> Marc 'BlackJack' Rintsch


I like top posted threads, its my preferred response method - and actually 
also how I prefer to read a thread.  Normally, I and the thread followers 
are familiar with a threads context - and don't need to read down to get the 
context of a response.  Not much of a hardship really and just as I give my 
time freely in answering a thread - everyone else can chose freely to read 
it or ignore.

I don't though have no issues with people who chose to bottom post, or 
respond with the full thread if its relevent, or trim it.  If the answer is 
relevent, I'll gladly spend the time reading it from any direction.

Regards

John Timney (MVP)
http://www.johntimney.com
http://www.johntimney.com/blog




From planetmatt at gmail.com  Wed Sep  5 06:58:54 2007
From: planetmatt at gmail.com (planetmatt)
Date: Wed, 05 Sep 2007 10:58:54 -0000
Subject: Looping through File Question
Message-ID: <1188989934.436165.213680@w3g2000hsg.googlegroups.com>

I am a Python beginner.  I am trying to loop through a CSV file which
I can do.  What I want to change though is for the loop to start at
row 2 in the file thus excluding column headers.

At present I am using this statement to initiate a loop though the
records:

for line in f.readlines():

How do I start this at row 2?



From fructidor00 at gmail.com  Sun Sep  9 18:03:15 2007
From: fructidor00 at gmail.com (GuillaumeC)
Date: Sun, 09 Sep 2007 22:03:15 -0000
Subject: UnboundLocalError on global variable
In-Reply-To: <mailman.298.1189371097.2658.python-list@python.org>
References: <mailman.298.1189371097.2658.python-list@python.org>
Message-ID: <1189375395.552350.196510@50g2000hsm.googlegroups.com>

> def processLogEntry(entry):
# ADD THIS TO YOUR CODE
    global cmterID_
>
>    revision = int(entry.getRevision())
>    commiter = str(entry.getAuthor())
>    datetime = getTimeStamp(entry.getDate())
>    message = str(entry.getMessage())
>
>    Commiter_[0] = cmterID_ //HERE's THE PROBLEM

The reason why it does not work is that there is an assignment to
cmterID_ in your function - even if it is after the problem. As a
consequence, the bytecode compiler makes this name local, and the name
is unbound. The quick fix is to add the global statement as above.

There is a good explanation here:
http://paddy3118.blogspot.com/2006/07/python-functions-assignments-and-scope.html

May I suggest that you use less global variables, for instance
enclosing your method in a class?



From duncan.booth at invalid.invalid  Thu Sep  6 04:52:02 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 6 Sep 2007 08:52:02 GMT
Subject: Autogenerate functions (array of lambdas)
References: <1189067829.685339.50550@y42g2000hsy.googlegroups.com>
Message-ID: <Xns99A36463FEF74duncanbooth@127.0.0.1>

Chris Johnson <effigies at gmail.com> wrote:

> 2) Is there a better or preferred method than the one I've found?
> 

Use function default arguments to keep the current value of i at the point 
where you define the function.

a = [(lambda n=i: n) for i in range(10)]



From bj_666 at gmx.net  Thu Sep 13 13:33:33 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 13 Sep 2007 17:33:33 GMT
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr> <fc8fc9$4qa$1@news2.carnet.hr>
	<5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<87sl5j5r34.fsf@benfinney.id.au>
	<1189646281.569796.267940@d55g2000hsg.googlegroups.com>
	<87ir6f5mrq.fsf@benfinney.id.au>
	<1189651204.408268.57580@19g2000hsx.googlegroups.com>
	<1i4dddf.piaojwz9lz40N%aleax@mac.com>
	<1189700775.661780.292150@50g2000hsm.googlegroups.com>
	<46e96aaa$0$7685$9b4e6d93@newsspool2.arcor-online.net>
	<1189703457.297526.172460@50g2000hsm.googlegroups.com>
Message-ID: <5ktajdF57ml9U2@mid.uni-berlin.de>

On Thu, 13 Sep 2007 10:10:57 -0700, TheFlyingDutchman wrote:

>> Isn't one of the main ideas behind python that it doesn't force you to
>> do (well, declare) anything? And by "ideas" I mean "design decisions".
>> Thats exactly what makes python great for prototyping; you just do it
>> and see if it works. As soon as you need to declare things you have to
>> change stuff in at least 2 places for every change of heart you have.
>>
>> (Can you tell I'm currently forced to developing in Java? ;) (Which I'm
>> currently avoiding to do, by wasting my time on usenet.))
>>
> But if you are looking at code you didn't write, it's nice to be able
> to see all the member variables that a class has listed separate from
> method code.

That information is usually in the `__init__()` method and the class
docstring.

> I think static typing helps in trying to deduce what code is doing,
> particularly when you are looking at function definitions. You don't
> have to work to find out what type of variables it takes.

This should either be obvious or in the docstring.

Ciao,
	Marc 'BlackJack' Rintsch


From ebgssth at gmail.com  Tue Sep 18 07:15:34 2007
From: ebgssth at gmail.com (js)
Date: Tue, 18 Sep 2007 20:15:34 +0900
Subject: Looking for web software in Python.
In-Reply-To: <BLU110-W319059A993A1EA5197709EAAB80@phx.gbl>
References: <BLU110-W319059A993A1EA5197709EAAB80@phx.gbl>
Message-ID: <a23effaf0709180415n27808c0fv3af4df8ed00c10a3@mail.gmail.com>

http://wiki.python.org/moin/WebApplications?highlight=%28%28PythonWikiEngines%29%29

Hope this  helps

On 9/18/07, Kevin Ar18 <kevinar18 at hotmail.com> wrote:
>
> Are any of the following pieces of web software available in Python (under a non-copyleft license like BSD or MIT or Python license)?
>
>
> Mailing list - with web accessable archive and list maintenance.
> Source control
> Wiki System
>
> Again, only non-copyleft licenses like MIT, BSD, or public domain.
>
>
> Or would I be better off with PHP?
>
>
>
> BTW, does anyone know where that project is that was working on a forum made with Python?
> _________________________________________________________________
> More photos; more messages; more whatever ? Get MORE with Windows Live? Hotmail(r). NOW with 5GB storage.
> http://imagine-windowslive.com/hotmail/?locale=en-us&ocid=TXT_TAGHM_migration_HM_mini_5G_0907
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From eduardo.padoan at gmail.com  Fri Sep 14 21:59:13 2007
From: eduardo.padoan at gmail.com (Eduardo O. Padoan)
Date: Fri, 14 Sep 2007 22:59:13 -0300
Subject: How to avoid overflow errors
In-Reply-To: <7xmyvoag7j.fsf@ruckus.brouhaha.com>
References: <13em8vnr527rq20@corp.supernews.com>
	<mailman.560.1189817022.2658.python-list@python.org>
	<7xmyvoag7j.fsf@ruckus.brouhaha.com>
Message-ID: <dea92f560709141859peddacd1qe397c93d7cad7996@mail.gmail.com>

On 14 Sep 2007 18:08:00 -0700, Paul Rubin
<"http://phr.cx"@nospam.invalid> wrote:
> "Eduardo O. Padoan" <eduardo.padoan at gmail.com> writes:
> > Not totally unrelated, but in Py3k, as it seems, overflows are really
> > things of the past:
> >
> >
> > Python 3.0a1 (py3k:58061, Sep  9 2007, 13:18:37)
> > [GCC 4.1.3 20070831 (prerelease) (Ubuntu 4.1.2-16ubuntu1)] on linux2
> > Type "help", "copyright", "credits" or "license" for more information.
> > >>> class MyInt(int):
> > ...     pass
> > ...
> > >>> import sys
> > >>> MyInt(sys.maxint)
> > 2147483647
> > >>> MyInt(sys.maxint+1)
> > 2147483648
>
> I'd be interested in knowing what happens in 3.0a1 with
>
>   a = itertools.count(sys.maxint)
>   print a.next()
>   print a.next()


>>> print(next(a))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
OverflowError: cannot count beyond PY_SSIZE_T_MAX

Hum, you've got me there. it is the same as in 2.x. Maybe the message
should be less crypt, at least - nothing that googling for
PY_SSIZE_T_MAX cant help.

-- 
http://www.advogato.org/person/eopadoan/
Bookmarks: http://del.icio.us/edcrypt


From martin at v.loewis.de  Sat Sep 22 11:04:29 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 22 Sep 2007 17:04:29 +0200
Subject: uninstall python2.5 on debian
In-Reply-To: <mailman.702.1190098989.2658.python-list@python.org>
References: <mailman.702.1190098989.2658.python-list@python.org>
Message-ID: <46f52efe$0$15178$9b622d9e@news.freenet.de>

> I have tried make uninstall and searched the web, but that did not help me.
> I guess rm -Rf python2.5 is not a wise thing to do.

It's part of the solution. There is no automated install procedure; you
have to manually remove everything that got installed. In <prefix>/bin,
it's most files that have 2.5 in their name, plus any links to them. In
<prefix>/lib, it's python2.5. In <prefix>/include, it's python2.5. Plus
a few things that I probably forgot.

Regards,
Martin


From tdelaney at avaya.com  Mon Sep 24 08:07:20 2007
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Mon, 24 Sep 2007 20:07:20 +0800
Subject: Almost There - os.kill()
In-Reply-To: <1190634935.3385.36.camel@dot.uniqsys.com>
Message-ID: <E4C7BCAB1872014F81CEAACD25699B8C0849AA@301081ANEX2.global.avaya.com>

Carsten Haese wrote:

> On Mon, 2007-09-24 at 19:48 +0800, Delaney, Timothy (Tim) wrote:
>> Always be careful with int() incase any of the values have a leading
>> zero - check the documentation for int() carefully.
> 
> Why would leading zeroes be a problem?
> 
>>>> int("10")
> 10
>>>> int("010")
> 10
>>>> int("0010")
> 10
>>>> int("00010")
> 10
> 
> Maybe you're thinking of "evil eval?"
> 
>>>> eval("10")
> 10
>>>> eval("010")
> 8

Nope - pretty sure that an earlier version of Python defaulted to a
radix of 0, but it appears to default to a radix of 10 in Python 2.5.

In any case, I've submitted a bug report and suggested new text for the
documentation of int() to make it clear what happens when a radix is not
specified.

Tim Delaney


From mal at egenix.com  Tue Sep 25 08:13:41 2007
From: mal at egenix.com (M.-A. Lemburg)
Date: Tue, 25 Sep 2007 14:13:41 +0200
Subject: database persistence with mysql, sqlite
In-Reply-To: <1190502677.970811.181100@22g2000hsm.googlegroups.com>
References: <1190502677.970811.181100@22g2000hsm.googlegroups.com>
Message-ID: <46F8FB75.2070409@egenix.com>

On 2007-09-23 01:11, coldpizza wrote:
> Hi,
> 
> I want to run a database query and then display the first 10 records
> on a web page. Then I want to be able to click the 'Next' link on the
> page to show the next 10 records, and so on.
> 
> My question is how to implement paging, i.e. the 'Next/Prev' NN
> records without reestablishing a database connection every time I
> click Next/Prev? Is it at all possible with cgi/mod_python?
> 
> For example, in a NON-web environment, with sqlite3 and most other
> modules, I can establish a database connection once, get a cursor
> object on which I run a single 'SELECT * FROM TABLE' statement and
> then use cursor.fetchmany(NN) as many times as there are still results
> left from the initial query.
> 
> How do I do the same for the web? I am not using any high-level
> framework. I am looking for a solution at the level of cgi or
> mod_python (Python Server Pages under Apache). To call
> cursor.fetchmany(NN) over and over I need to pass a handle to the
> database connection but how do I keep a reference to the cursor object
> across pages? I use mysql and sqlite3 as databases, and I am looking
> for an approach that would work with both database types (one at a
> time). So far I have successfully used the following modules for
> database access: sqlite3, mysqld, and pyodbc.
> 
> So far, with mysql I use 'SELECT * FROM TABLE LIMIT L1, L2' where L1
> and  L2 define the range for the 'Next' and 'Previous' commands. I
> have to run the query every time a click a 'Next/Prev' link. But I am
> not sure that this is the best and most efficient way. I suppose using
> CURSOR.FETCHMANY(NN) would probably be faster and nicer but how do I
> pass an object reference across pages? Is it possible without any
> higher-level libraries?
> 
> What would be the proper way to do it on a non-enterprise scale?

Depends on what "enterprise" scale means to you :-)

The easiest way to get excellent performance for such queries is
using a long running process, mod_scgi and have the browser
send a session cookie for you to use to identify the request.
You can then open the connection and keep it open while the user
browses the site.

If you want to save yourself from most of the details,
just use Zope or Plone + e.g. our mxODBC Zope DA for the
database connection (it works with all the databases
you mention on Windows, Linux and Mac OS X).

Even if you don't want to code things using Zope/Plone,
you should still consider it for taking care of all the
middleware logic and then write your application as
separate package which you hook into Zope/Plone using
"external methods" or "Python scripts" (in their Zope
sense).

> Would SqlAlchemy or SqlObject make things easier with regard to
> database persistence?

Not really: they don't provide the session mechanisms you
would need.

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, Sep 25 2007)
>>> Python/Zope Consulting and Support ...        http://www.egenix.com/
>>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
>>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

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


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


From carsten at uniqsys.com  Thu Sep 13 21:26:33 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 13 Sep 2007 21:26:33 -0400
Subject: Extending Python with C API
In-Reply-To: <c69d11d00709131805j1c39dc1w47ec39e914a72191@mail.gmail.com>
References: <c69d11d00709131805j1c39dc1w47ec39e914a72191@mail.gmail.com>
Message-ID: <1189733193.3248.7.camel@localhost.localdomain>

On Thu, 2007-09-13 at 18:05 -0700, Thierry Masson wrote:
> Hello,
> 
> I'm trying to use the C API to extend Python. I've looked at various
> books and web sites (including the docs at python.org) and I can't get
> any of the samples to work. Below is a very minimalist example that
> I'm trying to get working and I was wondering if someone could tell me
> where I'm going wrong. It's probably something very obvious to those
> familiar with this technique. 
>[snip...]
> The setup script builds the library OK, and I've verified that
> gtestmodule.so is getting created. But when I try to run a test script
> ( test.py, above) that uses the library, I get this error:
> 
> Traceback (most recent call last):
>   File "test.py", line 2, in ?
>     import gtestmodule
> ImportError: ./gtestmodule.so: undefined symbol: PyBuildValue 

Your module C code uses an unknown function by the name of PyBuildValue.
The actual name of the function you mean is Py_BuildValue.

HTH,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From marcobonifazi at gmail.com  Thu Sep 20 11:21:06 2007
From: marcobonifazi at gmail.com (Marco Bonifazi)
Date: Thu, 20 Sep 2007 15:21:06 -0000
Subject: Python and RTF
In-Reply-To: <13f51i4adkseae5@corp.supernews.com>
References: <1190271676.160077.99270@w3g2000hsg.googlegroups.com>
	<13f51i4adkseae5@corp.supernews.com>
Message-ID: <1190301666.417426.13320@r29g2000hsg.googlegroups.com>

On 20 Set, 16:40, Grant Edwards <gra... at visi.com> wrote:
> On 2007-09-20, Rufman <stephaneru... at gmail.com> wrote:
>
> > Does anyone have a good rtf library for python,
>
> pyRTF is the only one I found.
>
> > have exprience with pyRTF
>
> Yes.
>
> > or a link to a good tutorial?
>
> Just the examples that come with pyRTF.
>
> FWIW, I've added support for EMF graphics and enhanced the
> scaling options for graphics:
>
> http://groups.google.com/group/comp.lang.python.announce/browse_threa...
>
> --
> Grant Edwards                   grante             Yow! Uh-oh!!  I'm having
>                                   at               TOO MUCH FUN!!
>                                visi.com


Oh, wonderful!
Is licensed with the GPL and LGPL as like the previous versions are?
Then, can I put in my closed software and at the end of my development
make a donation?

Marco Bonifazi




From arnodel at googlemail.com  Mon Sep  3 17:32:57 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 03 Sep 2007 14:32:57 -0700
Subject: trap setting attribute when the attribute is dict
In-Reply-To: <fbhodb$5uv$1@geraldo.cc.utexas.edu>
References: <fbhi38$3rg$1@geraldo.cc.utexas.edu>
	<1188845236.417709.307160@50g2000hsm.googlegroups.com>
	<fbhodb$5uv$1@geraldo.cc.utexas.edu>
Message-ID: <1188855177.466618.53640@22g2000hsm.googlegroups.com>

On Sep 3, 8:47 pm, <yos... at ccwf.cc.utexas.edu> wrote:

[...]

> My intention was to have a propery 'sum' in my object, and which has sum
> of all the values() of the dict (i have code to make sure that the value
> of dict are all numeric).  I could just the propery being calculated
> everytime the property got __getattr__.  But I thought that it was
> inefficient to calculate the same number over and over when the value is
> already known.  So I was thiking of calculating the number only when the
> dict got modified.
>
> I also experimented with the idea of subclassing dict itself to
> calculate the sum.  Is this what would be better solution?

Why not simply have a method to update the dictionary that also keeps
the sum up to date? Something like that:

>>> class MyObj(object):
...     def __init__(self):
...         self._d = {}
...         self._sum = 0
...     def set_key(self, key, val):
...         self._sum += val - self._d.get(key, 0)
...         self._d[key] = val
...     def get_key(self, key):
...         return self._d[key]
...     def sum(self):
...         return self._sum
...
>>> a = MyObj()
>>> a.set_key(1, 2)
>>> a.sum()
2
>>> a.set_key('a', 10)
>>> a.set_key(1, 5)
>>> a.sum()
15
>>>

Of course this is only worth it if you need to use the sum often
enough.
If you update the dictionary a lot but only need the sum from time to
time, then it might not be worth it at all.

Of course you could subclass dict:

class MyDict(dict):
    def __init__(self, *args, **kwargs):
            self._sum = sum(self.itervalues())
    def __setitem__(self, key, val):
            self._sum += val - self.get(key, 0)
            dict.__setitem__(self, key, val)
    def sum(self):
            return self._sum
    # overload all other methods that mutate the dict
    # to keep _sum up to date

>>> d = MyDict()
>>> d.sum()
0
>>> d['a']=5
>>> d.sum()
5
>>> d['b']=10
>>> d['a']=8
>>> d.sum()
18
>>>

HTH

--
Arnaud




From tokland at gmail.com  Sat Sep 29 17:17:36 2007
From: tokland at gmail.com (tokland at gmail.com)
Date: Sat, 29 Sep 2007 21:17:36 -0000
Subject: question about for cycle
In-Reply-To: <1191094689.726813.235340@50g2000hsm.googlegroups.com>
References: <mailman.1275.1191060311.2658.python-list@python.org>
	<1191073123.459709.98870@g4g2000hsf.googlegroups.com>
	<mailman.1278.1191076522.2658.python-list@python.org>
	<1191079144.724699.250470@o80g2000hse.googlegroups.com>
	<1191094689.726813.235340@50g2000hsm.googlegroups.com>
Message-ID: <1191100656.710846.108810@o80g2000hse.googlegroups.com>

On 29 sep, 21:38, Zentrader <zentrad... at gmail.com> wrote:

> ctr_a=0
> ctr_b=0
> while ctr_a < len(generator_a):
>      this_el_a = generator_a[ctr_a]
>      while ctr_b <  len(generator_b):
>          this_el_b = generator_b[ctr_ b]
>          if something_happen:
>              ctr_b = len(generator_b)       ## break this loop
>          if something_else:
>              ctr_a = len(generator_a)       ## break outer while loop
>          ctr_b += 1
>      ctr_a += 1

Mmm, isn't a bit complicated?

Anyway, neither len() nor __getitem__ work on generators.



From grante at visi.com  Thu Sep 20 10:35:24 2007
From: grante at visi.com (Grant Edwards)
Date: Thu, 20 Sep 2007 14:35:24 -0000
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<fcq352$u0a$1@sea.gmane.org>
	<mailman.786.1190246955.2658.python-list@python.org>
	<1190269056.975115.217050@22g2000hsm.googlegroups.com>
Message-ID: <13f519cj6nor65c@corp.supernews.com>

On 2007-09-20, TheFlyingDutchman <zzbbaadd at aol.com> wrote:

> Is the only point in getting rid of the GIL to allow multi-threaded
> applications?

That's the main point.

> Can't multiple threads also provide a performance boost versus
> multiple processes on a single-core machine?

That depends on the algorithm, the code, and the
synchronization requirements.

> OK, have to agree. Sounds like it could be a good candidate
> for a fork. One question - is it a computer science maxim that
> an interpreter that implements multi-threading will always be
> slower when running single threaded apps?

I presume you're referring to Amdahl's law.

  http://en.wikipedia.org/wiki/Amdahl's_law

Remember there are reasons other than speed on a
multi-processor platorm for wanting to do multi-threading.
Sometimes it just maps onto the application better than
a single-threaded solution.

-- 
Grant Edwards                   grante             Yow! I want you to MEMORIZE
                                  at               the collected poems of
                               visi.com            EDNA ST VINCENT MILLAY
                                                   ... BACKWARDS!!


From duncan.booth at invalid.invalid  Wed Sep 26 04:31:15 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 26 Sep 2007 08:31:15 GMT
Subject: sorteddict PEP proposal [started off as orderedict]
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>
	<1190753722.026806.254530@d55g2000hsg.googlegroups.com>
	<1190756003.292096.71130@o80g2000hse.googlegroups.com>
	<1190789981.385466.37870@57g2000hsv.googlegroups.com>
Message-ID: <Xns99B760A3F5859duncanbooth@127.0.0.1>

Mark Summerfield <m.n.summerfield at googlemail.com> wrote:

> As you've no doubt realised, this particular implementation gives best
> performance when the pattern of use is: lots of edits, lots of
> lookups, ..., and gives worst performance when the pattern of use is:
> edit, lookup, edit, lookup (in which case using a dict and sorted() is
> probably better).
> 
> So there is lots of scope for someone to do a version that has good
> performance for all patterns of use:-)

I that's the point though: you can't write one implementation that has good 
performance for all patterns of use: you have to either compromise on 
performance somewhere, or use an implementation specifically matched to 
your use case.

For example, if the use case was some updates followed by iterating over 
the first few keys only, it may be faster to use a heap for iteration.

I suspect that for many use patterns you could improve performance 
significantly by having two levels of invalidation for the the key list: in 
__setitem__, if the key already exists you don't need to discard the list 
in __keycache (although if a key or cmp function was provided it may no 
longer be sorted). In that case it might be worthwhile keeping __keycache 
but flagging it as needing to be sorted again next time it is used. Given 
that Python's sort is very fast on sorted or nearly sorted lists this could 
provide a worthwhile speedup for cases where the values change but the keys 
don't change often.



From michele.simionato at gmail.com  Wed Sep 12 11:12:15 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Wed, 12 Sep 2007 15:12:15 -0000
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <1189608231.151112.147550@y42g2000hsy.googlegroups.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189604018.520338.162520@57g2000hsv.googlegroups.com>
	<46e7f450$0$12305$426a74cc@news.free.fr>
	<1189608231.151112.147550@y42g2000hsy.googlegroups.com>
Message-ID: <1189609935.347945.139000@19g2000hsx.googlegroups.com>

On Sep 12, 4:43 pm, Charles Fox <charles.... at gmail.com> wrote:
> Thanks guys -- yeah these two stategies (short s.varname; and explicit
> rescoping, a=self.a etc) are more or less what I was using.  That's
> still kind of annoying though.
>
> The s.varname approach still makes numerical code much harder to read.
>
> I had a nasty bug with the boilerplate approach when forgetting to
> reassign some of the variables back to members (self.a=a).  And that's
> a lot of boilerplate you need -- I thought the python way was to
> minimize redundant code?  (Ditching header files and curley brackets
> was a main reason for me coming here).

You still can play with dictionaries, for instance:

def __init__(self, a, b, c):
   vars(self).update(locals())

correspond to

self.a = a
self.b = b
self.c = c

(and actually also to self.self =self).

> I see the argument for making self explicit -- what would be wrong
> with just .a instead of self.a though?  That's still explicit but much
> easier to read.  (I think I've seen that somewhere else, is it C#?)

This has been proposed many times. But self is handy because you can
give
a different name to it: for instance it becomes cls when you are
inside a classmethod.


    Michele Simionato



From gandalf at shopzeus.com  Thu Sep 13 09:41:30 2007
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Thu, 13 Sep 2007 15:41:30 +0200
Subject: wx.ToplevelWindow.SetIcon: Native MS Windows error dialog pops
	up	in wxPython app, no exception raised, no stack trace
In-Reply-To: <1189689558.938858.43970@g4g2000hsf.googlegroups.com>
References: <mailman.479.1189682950.2658.python-list@python.org>
	<1189689558.938858.43970@g4g2000hsf.googlegroups.com>
Message-ID: <46E93E0A.9090706@shopzeus.com>


> See main.py of the Demo, line 1129. img2py is in the following default
> location:
> C:\Python24\Lib\site-packages\wx-2.8-msw-unicode\wxPython\tools
>   

> Without seeing how you create the image, it's hard to troubleshoot,
> but I would guess that you have an absolute path that you're using in
> your script that is different than what the exe is looking for.
>   
I actually do have a wx.Icon instance loaded from a file. This problem 
is not about loading a file into a wx.Icon instance. This why I'm 
suprised about the message ("cannot load image file"). I already have 
both the icon and the top level window in memory. If I comment out the

self.SetIcon(icon)

line in my code then there is no error message (and no icon on the 
frame). The SetIcon method will call the Windows API at the end, and it 
has nothing to do with files. It accepts a window handle and a pointer 
to an icon resource. I cannot think about anything that would need to 
read from a file while setting the icon of the frame.  Moreover, the 
icon is showing on the frame, looks like there is no error, so why am I 
getting a message? It is not a python Exception, it pops out from 
nowhere. :-) I suspect it will be an internal error in wxWidgets or 
wxPython. But their mailing list is not working. :-(

Thanks anyway.

   Laszlo



From ldo at geek-central.gen.new_zealand  Thu Sep 27 01:05:32 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Thu, 27 Sep 2007 17:05:32 +1200
Subject: database persistence with mysql, sqlite
References: <1190502677.970811.181100@22g2000hsm.googlegroups.com>
	<mailman.993.1190636458.2658.python-list@python.org>
	<1190650748.590245.221490@n39g2000hsh.googlegroups.com>
	<HSnKi.35782$RX.34622@newssvr11.news.prodigy.net>
	<fdd5dg$o0o$4@lust.ihug.co.nz>
	<NnFKi.2654$6p6.417@newssvr25.news.prodigy.net>
Message-ID: <fdfdms$vt7$2@lust.ihug.co.nz>

In message <NnFKi.2654$6p6.417 at newssvr25.news.prodigy.net>, Bryan Olson
wrote:

> Lawrence D'Oliveiro wrote:
>> In Bryan Olson wrote:
>> 
>>> coldpizza wrote:
>>>> It turned out that the method above ('SELECT * FROM TABLE LIMIT L1,
>>>> L2') works ok both with mysql and sqlite3, therefore I have decided to
>>>> stick with it until I find something better. With Sqlite3 you are
>>>> supposed to use LIMIT 10 OFFSET NN, but it also apparently supports
>>>> the mysql syntax (LIMIT NN, 10) for compatibility reasons.
> 
>>> A more reliable form is along the lines:
>>>
>>>      SELECT keyfield, stuff
>>>      FROM table
>>>      WHERE keyfield > ?
>>>      ORDER BY keyfield
>>>      LIMIT 10
>>>
>>> With the right index, it's efficient.
>> 
>> But that involves keeping track of the right starting keyfield value for
>> the next batch of records, which is complicated and nontrivial.
> 
> We write the link so that the browser will send back the parameter we
> need. If the largest keyfield value on the page is
> "Two-Sheds" the link might read:
> 
> <A HREF="http://rfh.uk/tablnext.cgi?start=Two-Sheds">Next</A>

That's assuming keyfield is a) unique, and b) a relevant ordering for
displaying to the user.

> Keeping a cursor with pending data across HTTP requests is
> a world of hurt.

"limit offset, count" avoids all that.


From mccredie at gmail.com  Fri Sep 21 19:48:07 2007
From: mccredie at gmail.com (Matt McCredie)
Date: Fri, 21 Sep 2007 16:48:07 -0700
Subject: I could use some help making this Python code run faster using
	only Python code.
In-Reply-To: <1190417120.723579.267560@22g2000hsm.googlegroups.com>
References: <1190325588.608625.259800@q3g2000prf.googlegroups.com>
	<1190328413.226577.206740@k79g2000hse.googlegroups.com>
	<1190330015.131971.265680@y42g2000hsy.googlegroups.com>
	<1190357165.381313.197910@19g2000hsx.googlegroups.com>
	<Xns99B25B0334892duncanbooth@127.0.0.1>
	<1190394011.148384.106280@q3g2000prf.googlegroups.com>
	<mailman.897.1190412168.2658.python-list@python.org>
	<1190417120.723579.267560@22g2000hsm.googlegroups.com>
Message-ID: <9e95df10709211648q281d82dk2fa496816e04ff31@mail.gmail.com>

> It would be nice if Python could be made to automatically detect the
> LC and string translation patterns used by the unoptimized Python code
> and make them into optimized Python code on the fly at runtime.  I am
> more than a little amazed nobody has chosen to build a JIT (Just In-
> Time compiler) or cached-compiler into Python but maybe that sort of
> thing is just not needed given the fact that Python code can be easily
> optimized to run 30x faster.

See PyPy http://codespeak.net/pypy/ for a JIT comiler for python.
Although it is in the research phase, but worth taking a look at.

Matt


From __peter__ at web.de  Thu Sep 27 14:08:05 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 27 Sep 2007 20:08:05 +0200
Subject: getopt with negative numbers?
References: <1190913250.198794.269530@k79g2000hse.googlegroups.com>
	<fdgpic$ssu$00$1@news.t-online.com>
	<1190915197.390247.313590@57g2000hsv.googlegroups.com>
Message-ID: <fdgri5$ssu$00$2@news.t-online.com>

Casey wrote:

> On Sep 27, 1:34 pm, Peter Otten <__pete... at web.de> wrote:
>> optparse can handle options with a negative int value; "--" can be used
>> to signal that no more options will follow:
> 
> Thanks, Peter.  getopt supports the POSIX "--" end of options indicator
> as well, but that seems a little less elegant than being able to simply
> set a value that tells the parser "I don't use any numeric values as
> options, and I want to allow negative values as arguments".  At the
> parser level implemening this would be trivial and I frankly was hoping
> it had been implemented and it just wasn't mentioned in the spares
> Python getopt library reference.

After a quick glance into the getopt and optparse modules I fear that both
hardcode the "if it starts with '-' it must be an option" behaviour.

Peter


From ianare at gmail.com  Tue Sep  4 18:16:20 2007
From: ianare at gmail.com (=?iso-8859-1?B?aWFuYXLp?=)
Date: Tue, 04 Sep 2007 15:16:20 -0700
Subject: function call
In-Reply-To: <46ddc866$0$25003$426a34cc@news.free.fr>
References: <1188937059.459609.61850@57g2000hsv.googlegroups.com>
	<46ddc12c$0$24997$426a74cc@news.free.fr>
	<mailman.45.1188939395.2658.python-list@python.org>
	<46ddc866$0$25003$426a34cc@news.free.fr>
Message-ID: <1188944180.835384.40310@r34g2000hsd.googlegroups.com>

> > Every reasonable use case for this (and several unreasonable ones)
> > that I've encountered (and some that I've just imagined) can be better
> > addressed with a trace function (sys.set_trace) than by trying to do
> > this at the point of call.
>
> Indeed. Thanks for the correction.
>
> <op>
> relevant doc here:http://docs.python.org/lib/debugger-hooks.html
> </op>

Thanks for your help. I was hoping to see a quick and easy way to do
this, so this was helpful for this particular situation. I did not
want to set up a debugger, although I am aware it's the "correct"
thing to do ...

Cheers!




From techwr-l-confirm+22d099e2f3d881b010eaeb38c05837f62bbf60ad at lists.techwr-l.com  Mon Sep 17 19:24:38 2007
From: techwr-l-confirm+22d099e2f3d881b010eaeb38c05837f62bbf60ad at lists.techwr-l.com (techwr-l-confirm+22d099e2f3d881b010eaeb38c05837f62bbf60ad at lists.techwr-l.com)
Date: Mon, 17 Sep 2007 17:24:38 -0600
Subject: Your confirmation is required to join the TECHWR-L mailing list
Message-ID: <mailman.7690.1190071478.3063.techwr-l@lists.techwr-l.com>

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From jcd at sdf.lonestar.org  Thu Sep 13 14:52:47 2007
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Thu, 13 Sep 2007 14:52:47 -0400
Subject: plotting pixels in python
In-Reply-To: <1189708663.253748.323460@y42g2000hsy.googlegroups.com>
References: <1189706620.564963.29690@d55g2000hsg.googlegroups.com>
	<1189707751.846412.51420@r29g2000hsg.googlegroups.com>
	<1189708663.253748.323460@y42g2000hsy.googlegroups.com>
Message-ID: <20070913185247.GA7833@sdf.lonestar.org>

On Thu, Sep 13, 2007 at 06:37:43PM -0000, jo5867472 at gmail.com wrote regarding Re: plotting pixels in python:
> 
> On Sep 13, 11:22 pm, Paul McGuire <pt... at austin.rr.com> wrote:
> > On Sep 13, 1:03 pm, jo5867... at gmail.com wrote:
> >
> > > hi to all
> > > I am just a beginner of python. I want to know how pixels are plotted
> > > in python. I am not intending to use PIL because I don't need to
> > > manipulate images. So is there a simple module for 2D graphics and
> > > plot pixels
> >
> > Here is a *very* simple-minded module for creating BMP files, that
> > supports drawing points, lines, and simple shapes.
> >
> > http://www.geocities.com/ptmcg/python/index.html#bmp
> >
> > -- Paul
> 
> No currently I am using a canvas from the Tkinter module
> What I actually want is to show how a line is plotted pixel by pixel
> using a delay loop. I want functions something like putpixel not
> draw_line
> 

The question to your answer can be found here:

http://catb.org/~esr/faqs/smart-questions.html

Cheers,
Cliff


From govisathish at gmail.com  Thu Sep 13 10:19:04 2007
From: govisathish at gmail.com (python_lover)
Date: Thu, 13 Sep 2007 07:19:04 -0700
Subject: Help to start python
Message-ID: <1189693144.493878.130220@w3g2000hsg.googlegroups.com>

Hi All,

I'm new  to python. I installed python 2.5  and IDLE 1.2.1 . I'm able
to run shell commands.

But I don't know how to execute a python program using this. When I'm
opeing a py program a seperate IDLE window opeing with program text.
But I don't know to to execute the prg.

Please help me on this .

thank you

regards
Sat



From perl4hire at softouch.on.ca  Mon Sep 17 23:34:31 2007
From: perl4hire at softouch.on.ca (Amer Neely)
Date: Mon, 17 Sep 2007 23:34:31 -0400
Subject: Coming from Perl
In-Reply-To: <PGoHi.3595$3Y1.2483@newssvr17.news.prodigy.net>
References: <Cv%Fi.198$372.59@read2.cgocable.net>	<1189644803.816375.269950@y42g2000hsy.googlegroups.com>	<b46Gi.221$372.100@read2.cgocable.net>	<87y7fa52ru.fsf@benfinney.id.au>	<jWaGi.224$372.55@read2.cgocable.net>	<mailman.485.1189691416.2658.python-list@python.org>	<d9cGi.356$372.131@read2.cgocable.net>	<mailman.489.1189695918.2658.python-list@python.org>	<iPcGi.357$372.115@read2.cgocable.net>
	<mailman.490.1189698752.2658.python-list@python.org>
	<KgdGi.2174$tx1.172@read1.cgocable.net>
	<A7KGi.8106$z_5.484@nlpi069.nbdc.sbc.com>
	<oPRGi.2430$tx1.886@read1.cgocable.net>
	<PGoHi.3595$3Y1.2483@newssvr17.news.prodigy.net>
Message-ID: <LFHHi.2774$tx1.1003@read1.cgocable.net>

Bryan Olson wrote:
> Amer Neely wrote:
>> I don't have shell access but I can run 'which python' from a Perl 
>> script, and I will try the different shebang line you suggested.
> 
> And after trying it, Amer Neely reported:
> 
>> I tried `which python` and `whereis python` and got 0 back as a 
>> result. So it seems Python is not installed at all.
> 
> Probably right, but just to be thorough...  Since you do not
> have shell access, I'm guessing you are running these within
> a Perl cgi script, and getting the results via a browser. Is
> that right?

Yes.
> 
> Can you backtick other commands? What do you get if you run
> `which perl` the same way? How about `whoami`, `whereis sh`,
> and `which nosuchthingas5748614`? Can you list /, /bin and
> /usr/bin?

I just looked at my code and tried something else:
@SysCmd="which python";
system(@SysCmd);

and it came back
/usr/local/bin/python

> 
> How did you learn that this system could run your Perl
> scripts? Can that source give us anything to go on here?
> If Python is not installed, do you have some avenue for
> requesting it?
> 
> We're down to long shots. Still, hosts that support Perl
> but will not support Python are getting to be the rare.
> 
> 

I've asked my host to put in a request for it.

So it seems python IS installed, but not where I thought it was.

I just tried my script with the new path, but still got a 500 server 
error. Can I trap errors to a file locally?

-- 
Amer Neely
w: www.webmechanic.softouch.on.ca/
Perl | MySQL programming for all data entry forms.
"Others make web sites. We make web sites work!"


From jonas at mit.edu  Tue Sep  4 10:06:59 2007
From: jonas at mit.edu (jonas at mit.edu)
Date: Tue, 04 Sep 2007 07:06:59 -0700
Subject: GC performance with lists
Message-ID: <1188914819.723858.25000@d55g2000hsg.googlegroups.com>

While working on some python wrapping, I've run into some problems
where the GC seems to take an unreasonable amount of time to run. The
code below is a demonstration:

import gc
#gc.disable()

data = []
for i in xrange(100000):

    shortdata = []
    for j in range(57):
        mytuple = (j, i+1, i+2, i+3, i+4, i+5, i+6)
        shortdata.append(mytuple)
    data.extend(shortdata)

print len(data)

with gc disabled (the second line) the code runs in 15 seconds, with
it enabled it runs in 2:15, or ~9x slower. I expected some gc
overhead, but not an order of magnitude! Am I doing something
obviously wrong in the above code?

Thanks,
     ...Eric



From neogregorian at gmail.com  Fri Sep  7 10:51:43 2007
From: neogregorian at gmail.com (NeoGregorian)
Date: Fri, 07 Sep 2007 07:51:43 -0700
Subject: Python wrapper, problem with subprocess read/write
Message-ID: <1189176703.245411.60350@r29g2000hsg.googlegroups.com>

Hello, I am writing a wrapper to a basic Input/Output programs (where
you type a one line command at a time and then get 0 or more lines of
output before you can input the next command).

I'm sorry if this problem description is a bit long, but I wanted to
make the problem clear.

Example run of the original program:
C:\home\>start
Starting up program
   [Welcome to program v.X.Y.Z]
blahblahblah
and some more lines
>input command
program response...
more program response...
etc.
>another command
...

This is what the wrapper is expected to do...

1: Start up the program.
2: Forward the startup printouts by the program until the line where
it first asks for a command.
3: When waiting for input, input a command from a sequential list of
strings (or other source of strings).
4: Forward the programs printouts until all lines are read and the
program prompts for new command.
5: Repeat 3-4 until list is depleted or program is terminated and then
close the program.


Now, to the problem:
In step 2/4, how to read all lines except the one which is unfinished
(in the example, the lines beginning with >) and waiting for input?

My attempts use something like this:

proc = Popen(['programname'], stdout = PIPE, stdin = PIPE )
for string_element in string_source :
    proc.stdin.write(string_element)
    lines = proc.stdout.readlines()
    method_that_processes_output(lines)

The problem with this is that stdout.readlines() doesn't return since
it reads until EOF...
I tried instead to use:

lines = []
line = proc.stdout.readline()
while line :
    lines.append(line)
    line = proc.stdout.readline()

This prints out everything except the ">" line, which is good. But
then freezes while waiting for input, which is bad.

Any suggestions on how to solve this in a good way?



From arnodel at googlemail.com  Mon Sep 10 02:13:55 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 09 Sep 2007 23:13:55 -0700
Subject: Modul (%) in python not like in C?
In-Reply-To: <mailman.300.1189371539.2658.python-list@python.org>
References: <880dece00709091201n449d4c2k31998a5d426de17d@mail.gmail.com>
	<46E4466C.2030303@sdf.lonestar.org>
	<mailman.300.1189371539.2658.python-list@python.org>
Message-ID: <1189404835.984772.287220@r34g2000hsd.googlegroups.com>

On Sep 9, 10:06 pm, stef mientki <stef.mien... at gmail.com> wrote:
> J. Cliff Dyer wrote:
> > Dotan Cohen wrote:
>
> >> FIrst of all, how is the % symbol (as in 70%6=4) called in English?
>
> >> Second, in Turbo C -111%10=-1 however in python -111%10=9. Is one or
> >> the other in error? Is this a known gotcha? I tried to google the
> >> subject however one cannot google the symbol %. Thanks in advance.
>
> >> Dotan Cohen
>
> > The % operator is called "modulo" in English.  I don't think the
> > difference in implementation is an error.  It's just a difference of
> > calculation method.
>
> > Python will always yield a number x = m%n such that 0 <= x < n, but
> > Turbo C will always yield a number such that if x = m%n -x = -m%n.  That
> > is, since 111 % 10 = 1, -111 % 10 = -1.  The two values will always
> > differ by n (as used above).
>
> > I'm sure there are mathematicians on the list who can give you a more
> > technical, precise explanation of the reasons for the different results.
>
> It's a long time ago, but if I remember well,
> "modulo" was introduced as an operator in Galois fields theory,
> and Galois fields only exists of the whole numbers 0 .. N-1.

You're probably thinking of Galois *groups*.  Some finite Galois
groups are cyclic, so they are of the form Z/nZ that can be described
as {0, .. , n-1}.  But Galois groups can have many other forms.

--
Arnaud




From harry.g.george at boeing.com  Tue Sep 11 02:25:17 2007
From: harry.g.george at boeing.com (Harry George)
Date: Tue, 11 Sep 2007 06:25:17 GMT
Subject: Py2.5.1 on Ubuntu AMD X2, unicode problems
Message-ID: <xqxps0pg1ma.fsf@cola3.ca.boeing.com>

I'm building 2.5.1 from source, using the ubuntu(7.0.4)-provided gcc
4.1.2.  Based on google searches and nints found, here is the process:

------------------------------------------------------------
#---edit configure; test of wchar_t---
#include <ncursesw.h>
#include <wchar.h>
#-------------------------------------

cd Lib/test
rm test_multibyte*
cd ../..

#---edit Include/unicodeobject.h---
/* FIXME: MvL's new implementation assumes that Py_UNICODE_SIZE is
   properly set, but the default rules below doesn't set it.  I'll
   sort this out some other day -- fredrik at pythonware.com */
#define Py_UNICODE_SIZE 4
#ifndef Py_UNICODE_SIZE
#----------------------------

LDFLAGS='-L/usr/lib -lncursesw -L/usr/local/ssl/lib -lssl -lcrypto ' \
./configure --prefix=/usr/local \
--with-gcc=/usr/bin/gcc \
--enable-shared \
--enable-unicode=usc4 \

#---edit Modules/Setup---
(all the std ones....)
SSL=/usr/local/ssl
_ssl _ssl.c \
	-DUSE_SSL -I$(SSL)/include -I$(SSL)/include/openssl \
	-L$(SSL)/lib -lssl -lcrypto

#---end edits---

gmake altinstall
------------------------------------------------------------

I'm getting a failure during final libpython binding, on undefined
PyUnicodeUCS4_AsWideChar.  All the other PyUnicodeUCS4... functions
are being found.  It specifically says it is checking on the libpython
in /usr/local/lib (not somewhere in the source code build dirtree), so
that is a possible oddity.  Checking with nm on the lib shows
"AsWideChar" is in fact undefined.


1. If I onfigure with unicode=ucs2, does all this go away and I get a
working system (efficient or not) on my 64-bit machine?

2. Can you point to a configure (and maybe patch) process which leads
to a clean "make altinstall".    


-- 
Harry George
PLM Engineering Architecture


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Sep  3 07:26:54 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 03 Sep 2007 13:26:54 +0200
Subject: TypeError: 'module object is not callable'
In-Reply-To: <1188816626.021956.281040@22g2000hsm.googlegroups.com>
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<mailman.315.1188810174.28954.python-list@python.org>
	<46dbd11e$0$6228$426a74cc@news.free.fr>
	<mailman.317.1188812089.28954.python-list@python.org>
	<1188816626.021956.281040@22g2000hsm.googlegroups.com>
Message-ID: <46dbef7d$0$29304$426a74cc@news.free.fr>

christophertidy at hotmail.com a ?crit :
> Thank you for your help that seems to have done the trick.
> You are correct Diez B. Roggisch that I come from a java background!
> 
> I have a new tiny problem I can't understand either.
> Withing Step.py I have the following method
> 
> def isCompleted(self):
>     "Check whether data step has been processed"
>     return self.isCompleted

Java background, indeed !-)

In Python, everything (including functions, methods, modules, classes 
etc) is an object, and methods are just attributes like every others - 
ie, there's no separate namespaces for methods. So when you set an 
instance attribute 'isCompleted', it shadows the class attribute by the 
same name.

The obvious solution is to give attributes different names. The perhaps 
less obvious but much more pythonic solution is to get get rid of the 
getter if all it does is returning the attribute. I know this sounds 
strange when coming from Java, but there's no problem doing so - Python 
has support for computed attributes (aka properties), so you can always 
replace a plain attribute by a computed one latter if you need to do so, 
this won't impact the client code.

HTH


From gagsl-py2 at yahoo.com.ar  Fri Sep 14 00:06:11 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 14 Sep 2007 01:06:11 -0300
Subject: Setting stdout encoding
References: <1189416350.069995.220250@w3g2000hsg.googlegroups.com>
	<cfb578b20709100602i4146f5c0hd2a1343f644a90f@mail.gmail.com>
	<op.tygmb9nux6zn5v@gabriel2.softlabbsas.com.ar>
	<cfb578b20709110358n5801c19ie21d95ef1161e4c0@mail.gmail.com>
	<op.tykwpjijx6zn5v@gabriel2.softlabbsas.com.ar>
	<cfb578b20709130408u2bf27cabl72d230f5252480a6@mail.gmail.com>
Message-ID: <op.tymlolhqx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 13 Sep 2007 08:08:39 -0300, Fabio Zadrozny <fabiofz at gmail.com>  
escribi?:

>>
>> But I don't think it's a good idea. Changing the default encoding will
>> change it for *all* scripts, *all* users, *all* objects. And AFAIK you
>> have trouble ONLY with sys.std* - one should fix those objects, not mess
>> with a global configuration.
>>
>
> Makes sense... Do you think that creating a new object, setting it as
> sys.stdout and overriding its write() method to check for a unicode  
> string
> to do original_stdout.write(unicode_str.encode(my_encoding)) would do it?

Yes. See the other message from Ryan Ginstrom.

> (the ctypes version is not really an option as it is not available on  
> lots
> of installs -- although I can try to use it if it's available, but it  
> can't
> be the only solution).

I see... Wrapping stdout with your own object seems reasonable then.

-- 
Gabriel Genellina



From inigoserna at gmail.com  Mon Sep  3 18:02:36 2007
From: inigoserna at gmail.com (=?ISO-8859-1?Q?I=F1igo?= Serna)
Date: Tue, 04 Sep 2007 00:02:36 +0200
Subject: ANN: lfm 2.0
Message-ID: <1188856956.7698.11.camel@inigo>

Hi out there,

After a few years working silently I'm very pleased to announce here the
so much awaited new version of 'lfm'.

Last File Manager is a simple but powerful file manager for the
UNIX console. It's written in Python, using curses module.
Licensed under GNU Public License version 3.

Some of the features you could find in lfm:
- console-based file manager for UNIX platforms
- 1-pane or 2-pane view
- bookmarks
- vfs for compressed files
- dialogs with entry completion
- fast access to a shell
- direct integration of find/grep, df and other tools
- tabs per pane
- color files by extension [Andrey Skvortsov]
- fast file viewer with text and binary modes
- ...and many others


Download it from:

http://www.terra.es/personal7/inigoserna/lfm

or if it doesn't show last version (crap of ISP reverse proxy), try this
low-bandwidth home server:

http://inigo.katxi.org/devel/lfm

Of course, all comments, suggestions etc. are welcome.


Changes since previous version:

Version 2.0 ("Nine 1/2 weeks... ok, ok, and 3 years") - 2007/09/03:

  + tabs implemented
  + color files by extension [Andrey Skvortsov]
  + new IPC code and API; more flexible, powerful and stable
  + new un/compress vfs API, added support for .zip and .rar files
  + make sort mode per tab, not globally
  + support locale [Andrey Skvortsov]
  + speed up loading directory contents
  + speed cursor movement, don't waste much CPU
  + use logging module in lfm and pyview for debugging
  + overwrite_all_none: yes, all, no  => new options: "none", 
    "skip all""
  + rewrite/refactor most of code to make lfm more robust and clean
  + preferences:
    - change file name preferences.py => config.py
    - use ConfigParser
  + use tempfile secure versions mkdtemp() and mkstemp()
  + added man pages [Sebastien Bacher]
  + use reST for documentation
  + check for python version 2.3 or higher in lfm and pyview
  + updated to GPL v3 license
  + and fixed lot of bugs, some of them:
    - general:
      . delete garbage if user stops action
      . run 'do_special_view_file' as dettached from lfm window
      . path expand in bookmarks ("~/") [Andrey Skvortsov]
      . an ugly traceback crash appears when user starts "lfm path" and 
	has no permissions to enter. Show error message and default to
	current directory
      . lfm crashes when filename is not encoded with same codec than
        g_encoding utils.{decode|encode}. Needs curses module linked
	against ncursesw to work properly
      . sort_mix_cases = 1 performance degrades on larger dirs.
        Reported by Andrey Skvortsov
      . escape filenames with chars $ ". Reported by Andrey Skvortsov
    - user interface:
      . maximize/minimize window don't crash lfm anymore
      . dialogs appear at bad position after terminal is resized
      . handle window resize in Tree mode
      . refresh display after canceling completion dialog
      . "the size of the right pane does not fill the last column in
        terminal if their number is odd" [Andrey Skvortsov]
      . fix crash when "df" shows entries in two different lines (device
        name is too large, f.e. in linux lvm2 volumes)
      . if you try to enter a directory with insufficient permissions,
	after the error message is closed the cursorline refreshes to
	the first line
    - compress:
      . added -i flag (--ignore-zeros) flag to tar [Andrey Skvortsov]
      . standard tar needs - for flags
    - vfs:
      . vfs.py: regenerate_file, if user stops process, tempfile can't
	be deleted
    - find/grep:
      . escape special chars (- \ ( ) [ ]) in patterns
      . don't crash when find/grep returns no results
      . bug when matches occur in binary files
    - pyview:
      . goto line 0 in pyview showed a blank screen
      . crash in file info if filename is too long


Version 1.0 was never released in public


Best regards,
I?igo Serna




From bborcic at gmail.com  Wed Sep  5 07:57:42 2007
From: bborcic at gmail.com (Boris Borcic)
Date: Wed, 05 Sep 2007 13:57:42 +0200
Subject: So what exactly is a complex number?
In-Reply-To: <roy-3C221C.22043603092007@news.panix.com>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
	<mailman.4.1188866709.21370.python-list@python.org>
	<roy-3C221C.22043603092007@news.panix.com>
Message-ID: <46de99ee$1_5@news.bluewin.ch>

Roy Smith wrote:
> Boris Borcic <bborcic at gmail.com> wrote:
>> Complex numbers are like a subclass of real numbers 
> 
> I wouldn't use the term "subclass". 

Really you should name yourself as the author when you butcher someone else's 
prose to such a degree. Suppose I had written "Complex numbers are like an 
afghan beauty that has little chance to seduce you unless you first get to see 
her eyes despite the burkha she is usually wearing". Would you find it 
reasonable to cut this down to "Complex numbers are like an afghan beauty" and 
then criticize the result as if the word "like" hadn't survived this treatment ?

 > It certainly doesn't apply in the same
 > sense it applies in OOPLs.  For example, you can't say, "All complex
 > numbers are real numbers".  In fact, just the opposite.
 > But, it's equally wrong to say, "real numbers are a subclass of complex
 > numbers", at least not if you believe in LSP
 > (http://en.wikipedia.org/wiki/Liskov_substitution_principle).

Well, some edulcorated-analogical version of that principle was precisely what I 
had in mind when I wrote what I wrote - not what you cite and much less "just 
the opposite" of the latter, that you here adress.

What makes complex numbers magical to use is precisely that you can port to them 
without change (most of) the algebraic procedures that you first learn on the 
real number field. And manipulate them technically while neglecting that they 
are not really real numbers, except when convenient because (a) things will work 
uniformly using complex numbers where real numbers would present exceptions and 
(b) they allow more powerful results. And that's what LSP is about, is it not ?

> For example,
> it is true that you can take the square root of all complex numbers.  It is 
> not, however, true that you can take square root of all real numbers.

(a) note that with the subclass relation put in the order I had chosen, this 
would not contradict LSP

(b) and nevertheless :

 >>> x = -1.0
 >>> type(x)
<type 'float'>
 >>> import cmath
 >>> cmath.sqrt(x)
1j
 >>>

> 
> Don't confuse "subset" with "subclass".

Don't confuse myself with yourself, thanks :) Or are you going to say that you 
would have launched into the same diatribe if I had proposed a subclassing 
relation that wasn't counter the grain viz the purported subset relation ?

> The set of real numbers *is* a 
> subset of the set of complex numbers.

It *is* unfortunate that learning mathematics using sets allows to neglect the 
fundamental difference between the identity of physical objects and the identity 
of mathematical objects. The latter we only ever reach "up to isomorphism". 
There is a natural embedding of real numbers into complex numbers, but there is 
also a natural embedding of real numbers into surreal numbers. The two 
embeddings aren't compatible. So which should be promoted to "*being*", and why ?

> It is *not* true that either reals 
> or complex numbers are a subclass of the other.

What I had written : "Complex numbers are like a subclass of real numbers that 
elegantly extends the usual arithmetic operations to provide access to 
trigonometric functions and related goodies. This then allows you to think of 
trigonometric problems as simple arithmetic problems."

Boris Borcic




From arkanes at gmail.com  Tue Sep  4 16:56:29 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Tue, 4 Sep 2007 15:56:29 -0500
Subject: function call
In-Reply-To: <46ddc12c$0$24997$426a74cc@news.free.fr>
References: <1188937059.459609.61850@57g2000hsv.googlegroups.com>
	<46ddc12c$0$24997$426a74cc@news.free.fr>
Message-ID: <4866bea60709041356x21d7c204w87a44e7496b643b1@mail.gmail.com>

On 9/3/07, Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> wrote:
> ianar? a ?crit :
> > Hey all,
> >
> > Is there a way of printing out how a function was called? In other
> > words if I do the following:
> >
> > def someFunction(self):
> >     self.someOtherFunction(var1, var2)
> >
> >
> > I would get something like "someOtherFunction: called by:
> > someFunction, args are: var1, var2"
> >
> > Thanks in advance
> >
> You may be able to solve this using a decorator (to avoid polluting your
> code with this) and the infamous sys._getframe() hack.
> --

Every reasonable use case for this (and several unreasonable ones)
that I've encountered (and some that I've just imagined) can be better
addressed with a trace function (sys.set_trace) than by trying to do
this at the point of call.


From kenneth.m.mcdonald at sbcglobal.net  Sun Sep 23 01:26:22 2007
From: kenneth.m.mcdonald at sbcglobal.net (Kenneth McDonald)
Date: Sun, 23 Sep 2007 00:26:22 -0500
Subject: Python plugins for netbeans 6 IDE?
Message-ID: <46F5F8FE.2020208@sbcglobal.net>

Do any such exist? And do you find them worthwhile? I couldn't see any 
browsing the netbeans pages, but that doesn't mean they're not out there...

Thanks,
Ken


From tjreedy at udel.edu  Tue Sep 11 17:42:58 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 11 Sep 2007 17:42:58 -0400
Subject: Python.org mirror
References: <F79CF4D66F464242A8774755186E9EFE@laptopmark>
Message-ID: <fc724v$b50$1@sea.gmane.org>

|Could you inform me about the options to become an officiel python.org 
mirror?

The main python.org site maintainers do not necessarily read this 
group/list.

If no response here, try webmaster at python.org





From grante at visi.com  Thu Sep 20 10:40:04 2007
From: grante at visi.com (Grant Edwards)
Date: Thu, 20 Sep 2007 14:40:04 -0000
Subject: Python and RTF
References: <1190271676.160077.99270@w3g2000hsg.googlegroups.com>
Message-ID: <13f51i4adkseae5@corp.supernews.com>

On 2007-09-20, Rufman <stephanerufer at gmail.com> wrote:

> Does anyone have a good rtf library for python,

pyRTF is the only one I found.

> have exprience with pyRTF

Yes.

> or a link to a good tutorial?

Just the examples that come with pyRTF.

FWIW, I've added support for EMF graphics and enhanced the
scaling options for graphics:

http://groups.google.com/group/comp.lang.python.announce/browse_thread/thread/c56ccb0f65eae5da/e9997d47b4303547

-- 
Grant Edwards                   grante             Yow! Uh-oh!!  I'm having
                                  at               TOO MUCH FUN!!
                               visi.com            


From trekker182 at gmail.com  Sat Sep 15 21:29:37 2007
From: trekker182 at gmail.com (Shawn Minisall)
Date: Sat, 15 Sep 2007 21:29:37 -0400
Subject: thanks everyone for your replies!
Message-ID: <46EC8701.4040606@gmail.com>

:)


From vinay_sajip at yahoo.co.uk  Wed Sep 26 02:07:03 2007
From: vinay_sajip at yahoo.co.uk (Vinay Sajip)
Date: Tue, 25 Sep 2007 23:07:03 -0700
Subject: Overriding Logging Config FileHandler Filename
In-Reply-To: <mailman.1061.1190751312.2658.python-list@python.org>
References: <mailman.1061.1190751312.2658.python-list@python.org>
Message-ID: <1190786823.934389.139410@50g2000hsm.googlegroups.com>

On Sep 25, 9:15 pm, "Kenneth Love" <kl... at tax.ok.gov> wrote:
> I have a Pythonloggingconfig file that contains a RotatingFileHandler
> handler.  In the args key, I have hard-coded the log filename.  Everything
> works great.
>
> However, I find that I now need to override this filename at application
> runtime.  Is there a good way to do this?
>

Are you using the original file name mentioned in the config file at
all? Why and under what conditions do you need to switch? You could
easily do this programmatically - have two handlers and when you need
to, remove one from the logger and add the other. I see you are using
a rotating handler, which itself does rollover to new log files every
so often.

Regards,

Vinay Sajip



From paul at boddie.org.uk  Mon Sep  3 10:23:02 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Mon, 03 Sep 2007 07:23:02 -0700
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
In-Reply-To: <1188826786.674057.158020@d55g2000hsg.googlegroups.com>
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
	<1188735642.391419.103650@19g2000hsx.googlegroups.com>
	<1188740716.423349.304370@y42g2000hsy.googlegroups.com>
	<1188743299.664137.194760@d55g2000hsg.googlegroups.com>
	<46daeaec$0$19889$426a74cc@news.free.fr>
	<46DB04DD.80801@v.loewis.de>
	<46db085d$0$16113$9b4e6d93@newsspool1.arcor-online.net>
	<13dmctogeh19410@corp.supernews.com>
	<7x4picthpb.fsf@ruckus.brouhaha.com>
	<1188826786.674057.158020@d55g2000hsg.googlegroups.com>
Message-ID: <1188829382.536724.45270@d55g2000hsg.googlegroups.com>

On 3 Sep, 15:39, jwrweather... at gmail.com wrote:
> Thanks for all the answers to my question. I think what I need to take
> away from this is that xrange is an object

Indeed, but using xrange can be faster than converting your "for"
loops to "while" loops plus a counter; I converted your code to use
the latter arrangement and it was noticeably slower. Perhaps the
repeated invocation of each xrange object's next method is less
expensive than repeatedly obtaining new incremented int objects and
testing them against other int objects.

> - I thought it was just some loop construct, and that maths is slow in
> python - so avoid pathological looping.

You'd be wise to avoid doing unnecessary work deep within nested loops
in any programming language. Sadly, it's not possible for the compiler
to work out that some calculations can be lifted out of the innermost
loops in Python, since the various guarantees that make such
operations possible in other languages are not offered by Python.

> I remember the first time I tried Objective-C on OS X I used the
> NSNumber class for arithmetic - the results that time were pretty
> awful too!

Obviously, it'd be a fairer test if you used comparable numeric types
in both implementations, but a more capable numeric type would be
overkill for the C implementation of this program, and a less capable
numeric type doesn't exist for Python unless you're willing to use a
dialect such as Pyrex (as others have shown).

Paul



From joshua at eeinternet.com  Fri Sep 28 17:58:39 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Fri, 28 Sep 2007 13:58:39 -0800
Subject: GUI for viewing/editing python data structures?
References: <mailman.1139.1190845438.2658.python-list@python.org>
	<1190953236.340024.131370@o80g2000hse.googlegroups.com>
Message-ID: <fdjtef$bp5$1@sea.gmane.org>

On Thursday 27 September 2007 20:20, Paddy wrote:

> On Sep 26, 11:23 pm, "Joshua J. Kugler" <jos... at eeinternet.com> wrote:
>> A while back, I seem to remember coming across a small program that could
>> view and edit python data structures via a nice expanding tree view.  I'm
>> now in need of something like that (to verify data is imported correctly
>> into a shelve file) and having a GUI would be much simpler than trying to
>> wade through the output of str(d) or repr(d).
>>
>> I've tried googling with the obvious keywords (gui (view OR edit) python
>> data structures) but t didn't get me anywhere.
>>
> 
> The magic googling phrase is:
>   Python bean-editor
> 
> Which gave http://home.gna.org/oomadness/en/editobj/index.html
> 
> I've never used it. Could you tell me how you get on?
> 
> - Paddy.

Thank you!! This is EXACTLY what I was looking for. Should serve me well. 
For editing shelves, you just have to pull the data out via the key, and
then edit that, since a shelf is not a true dict, just acts like one.

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE



From tjreedy at udel.edu  Thu Sep 20 14:18:03 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 20 Sep 2007 14:18:03 -0400
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com><dea92f560709021735l2c72d53ew94410fcb33b9b50b@mail.gmail.com><mailman.303.1188779927.28954.python-list@python.org><1190164166.378500.155990@o80g2000hse.googlegroups.com><1190241711.344058.238380@57g2000hsv.googlegroups.com><1190242799.954176.279440@22g2000hsm.googlegroups.com><7xps0ew0a8.fsf@ruckus.brouhaha.com><13f3roj6gdfq6b7@corp.supernews.com>
	<7x1wctwg6x.fsf@ruckus.brouhaha.com>
Message-ID: <fcudgk$4li$1@sea.gmane.org>


"Paul Rubin" <"http://phr.cx"@NOSPAM.invalid> wrote in message 
news:7x1wctwg6x.fsf at ruckus.brouhaha.com...
| funding into PyPy development, since I think I saw something about the
| EU funding being interrupted.

As far as I know, the project was completed and promised funds paid.  But I 
don't know of any major follow-on funding, which I am sure they could use. 





From berteun at gmail.com  Wed Sep 26 08:06:26 2007
From: berteun at gmail.com (Berteun Damman)
Date: Wed, 26 Sep 2007 12:06:26 -0000
Subject: Tracking memory usage and object life time.
Message-ID: <1190808386.571152.103710@22g2000hsm.googlegroups.com>

Hello,

I have programmed some python script that loads a graph (the
mathemical one with vertices and edges) into memory, does some
transformations on it, and then tries to find shortest paths in this
graph, typically several tens of thousands. This works fine.

Then I made a test for this, so I could time it, run it several times
and take a look at the best time, et cetera. But it so happens that
the first time the test is run, is always the fastest. If I track
memory usage of Python in top, I see it starts out with around 80 MB
and slowly grows to 500MB. This might cause the slowdown (which is
about a factor 5 for large graphs).

When I run a test, I disable the garbage collection during the test
run (as is adviced), but just before starting a test I instruct the
garbage collector to collect. Running the test without disabling the
garbage collect doesn't show any difference though.

Where possible I explicitly 'del' some of the larger data structures
that have been created after I don't need them anymore. I furthermore
don't really see why there would be references to these larger objects
left. (I can be mistaken of course).

I understand this might be a bit of a vague problem, but does someone
have any idea why the memory usage keeps growing? And whether there is
some tool that assists me in keeping track of the objects currently
alive and the amount of memory they occupy?

The best I now can do is run the whole script several times (from a
shell script) -- but this also forces Python to reparse the graph
input again, and do some other stuff it only has to do once. And it's
also more difficult to examine values and results this way.

Berteun



From nytrokiss at gmail.com  Wed Sep 19 14:51:33 2007
From: nytrokiss at gmail.com (James Matthews)
Date: Wed, 19 Sep 2007 11:51:33 -0700
Subject: Removing objects in a list via a wild card
Message-ID: <8a6b8e350709191151n31b72bbvc3090031232d5fc8@mail.gmail.com>

Hi List

I have a list of files from my current directory:

import os

files = os.listdir(os.getcwd())

Now this list also includes some files that i don't want like my python
files... How would i remove them

Thanks
James

-- 
http://www.goldwatches.com/
http://www.jewelerslounge.com
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From paul.reiners at gmail.com  Tue Sep 11 18:55:44 2007
From: paul.reiners at gmail.com (Paul Reiners)
Date: Tue, 11 Sep 2007 22:55:44 -0000
Subject: Twisted Life version 1.0.0 (stable) released
Message-ID: <1189551344.358346.14050@r29g2000hsg.googlegroups.com>

Version 1.0.0 of Twisted Life has just been released. Twisted Life is
a video game that uses a variant of Conway's Life cellular automaton
as its universe.

In Twisted Life, you try to navigate to the center of the Twisted Life
universe without colliding into any of the malevolent, evil Life forms
circling the center.

I wrote this application as an entry to the PyWeek competition:

http://www.pyweek.org/

You can download Twisted Life from SourceForge.net:

http://sourceforge.net/projects/twisted-life/

Twisted Life is released under the GNU General Public License (GPL).



From bj_666 at gmx.net  Thu Sep 20 03:38:13 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 20 Sep 2007 07:38:13 GMT
Subject: os.popen and lengthy operations
References: <mailman.789.1190269908.2658.python-list@python.org>
Message-ID: <5lemb5F7r3c0U2@mid.uni-berlin.de>

On Thu, 20 Sep 2007 10:31:43 +0400, Dmitry Teslenko wrote:

> I'm using os.popen to perform lengthy operation such as building some
> project from source.
> It looks like this:
> def execute_and_save_output( command, out_file, err_file):
> 
> import os
> 
> def execute_and_save_output( command, out_file, err_file):
> 	(i,o,e) = os.popen3( command )
> 	try:
> 		for line in o:
> 			out_file.write( line )
> 
> 		for line in e:
> 			err_file.write( line )
> 	finally:
> 		i.close()
> 		o.close()
> 		e.close()
> 
> ...
> execute_and_save_output( '<some long to run command>', out_file, err_file)
> 
> Problem is that script hangs on operations that take long to execute
> and have lots of output such as building scripts.

Your code reads from the process' stdout until there is nothin to read
anymore and then from stderr.  The process might output something to both.
The output is buffered.  And when the stderr buffer is full the process
blocks until your application reads something from `e`.  That's where the
whole thing hangs.  You wait for something on `o` and the process waits
for you to read from `e` ? deadlock.

You have to use threads to read both `o` and `e` or the `select` module to
look which file has something to read.

Ciao,
	Marc 'BlackJack' Rintsch


From garyjefferson123 at yahoo.com  Thu Sep 20 10:06:33 2007
From: garyjefferson123 at yahoo.com (Gary Jefferson)
Date: Thu, 20 Sep 2007 07:06:33 -0700
Subject: distutils, extensions, and missing headers
In-Reply-To: <mailman.791.1190272989.2658.python-list@python.org>
References: <1190268535.052437.226240@v23g2000prn.googlegroups.com>
	<mailman.791.1190272989.2658.python-list@python.org>
Message-ID: <1190297193.864613.13890@i13g2000prf.googlegroups.com>

Robert, thanks for the help!


On Sep 20, 1:22 am, Robert Kern <robert.k... at gmail.com> wrote:
>
> Use the "headers" keyword to setup() to list the header files you want installed.

  I've tried "headers=['header1.h', 'header2.h']" in setup() as well
as in Extension(), and neither seem to get the files into the bdist or
bdist_rpm tarball.  Am I doing it wrong?  I can't seem to find any
examples that use this via google.


> For other files, it depends on where you need them to go. If you want the data
> files to be inside the package, you should use the "package_data" keyword. It
> was introduced in Python 2.4, so if you need to support pre-2.4 Pythons, there
> are recipes floating around to do so more nicely.
>
>  http://docs.python.org/dist/node12.html
>
> For other things (and hopefully, you can live with package data), use "data_files":
>
>  http://docs.python.org/dist/node13.html

  I also tried using data_files to get the headers included, but can't
seem to get that to work either.  No errors are reported for either
method.

Thanks,
Gary



From greg at cosc.canterbury.ac.nz  Mon Sep 24 22:16:35 2007
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Tue, 25 Sep 2007 14:16:35 +1200
Subject: ANN: Albow 1.1 and Humerus 1.0
Message-ID: <mailman.1035.1190714499.2658.python-announce-list@python.org>

I have released an updated version of my Albow gui library for PyGame, 
incorporating improvements made to it for my PyWeek 5 entry, and also Humerus, a 
skeleton game framework built on Albow.

http://www.cosc.canterbury.ac.nz/greg.ewing/python/Albow/

What is it?

Albow is a rather basic, no-frills widget set for creating a GUI using PyGame. 
It has been developed over the course of my last three PyWeek game competition 
entries. I am documenting and releasing it as a separate package so that others 
may benefit from it, and so that it will be permissible for use in future PyGame 
entries.

--
Gregory Ewing
greg.ewing at canterbury.ac.nz


From gtcopeland at gmail.com  Sat Sep  1 11:06:41 2007
From: gtcopeland at gmail.com (Greg Copeland)
Date: Sat, 01 Sep 2007 08:06:41 -0700
Subject: Pygame + PyInstaller?
Message-ID: <1188659201.217951.110830@r34g2000hsd.googlegroups.com>

Anyone had any luck on using PyInstaller to package up Pygame?  I
posted to the PyInstaller group some time ago and have yet to receive
a reply.  Anyone have any tips to offer here?

A like-solution which runs on Linux would also be welcome.  When
PyInstaller works, it's pretty nice.  When it doesn't, it is a real
pain to figure out what the heck it doesn't like.  So if anyone has a
less painful alternative, which runs on Linux, please let me know.


Greg



From aahz at pythoncraft.com  Thu Sep 13 22:41:31 2007
From: aahz at pythoncraft.com (Aahz)
Date: 13 Sep 2007 19:41:31 -0700
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<1i4bjb8.63ihk49vs6c8N%aleax@mac.com>
	<mailman.446.1189612813.2658.python-list@python.org>
	<1i4bm7a.1s51u591kreqe4N%aleax@mac.com>
Message-ID: <fccscr$qvq$1@panix3.panix.com>

In article <1i4bm7a.1s51u591kreqe4N%aleax at mac.com>,
Alex Martelli <aleax at mac.com> wrote:
>Chris Mellon <arkanes at gmail.com> wrote:
>> 
>> and I'll punch a kitten before I accept having to read
>> Python code guessing if something is a global, a local, or part of
>> self like I do in C++.
>
>Exactly: the technical objections that are being raised are bogus, and
>the REAL objections from the Python community boil down to: we like it
>better the way it is now.  Bringing technical objections that are easily
>debunked doesn't _strengthen_ our real case: in fact, it _weakens_ it.
>So, I'd rather see discussants focus on how things SHOULD be, rather
>than argue they must stay that way because of technical difficulties
>that do not really apply.
>
>The real advantage of making 'self' explicit is that it IS explicit, and
>we like it that way, just as much as its critics detest it.  Just like,
>say, significant indentation, it's a deep part of Python's culture,
>tradition, preferences, and mindset, and neither is going to go away (I
>suspect, in fact, that, even if Guido somehow suddenly changed his mind,
>these are issues on which even he couldn't impose a change at this point
>without causing a fork in the community).  Making up weak technical
>objections (ones that ignore the possibilities of __get__ or focus on
>something so "absolutely central" to everyday programming practice as
>inspect.getargspec [!!!], for example;-) is just not the right way to
>communicate this state of affairs.

While you have a point, I do think that there is no solution that allows
the following code to work with no marker distinguishing the local bar
from the instance's bar; the only question is how you want to mark up
your code:

class C:
    def foo(self, bar):
        print bar, self.bar

x = C()
x.bar = 'abc'
x.foo()

>From that standpoint, there is a technical objection involved.  Of
course, the solution can be any of a number of different marker systems
(or even choosing to have no marker and not permit a method to access
both object attributes and locals of the same name), and Python has
chosen to force the use of a marker for all object attributes, while also
choosing to have disjoint namespaces WRT globals and locals for any one
name.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"Many customs in this life persist because they ease friction and promote
productivity as a result of universal agreement, and whether they are
precisely the optimal choices is much less important." --Henry Spencer
http://www.lysator.liu.se/c/ten-commandments.html


From steve at holdenweb.com  Fri Sep 28 08:25:17 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 28 Sep 2007 08:25:17 -0400
Subject: recipient validation with smtplib
In-Reply-To: <46FCEA9E.3030700@chamonix.reportlab.co.uk>
References: <46FCE387.9070601@chamonix.reportlab.co.uk>	<9afea2ac0709280433n361ce4fx2a26a05de2b1b1ae@mail.gmail.com>
	<46FCEA9E.3030700@chamonix.reportlab.co.uk>
Message-ID: <fdirrf$ott$1@sea.gmane.org>

Robin Becker wrote:
> Tim Williams wrote:
>> On 28/09/2007, Robin Becker <robin at reportlab.com> wrote:
>>> Is there a way to use smtplib to get recipient validation. I can use smtplib
>>> quite happily to send emails using the locahost's sendmail, but sendmail is just
>>>  fire and forget, so some bad addresses eg idiot at www.dingo.zzz don't cause any
>>> error in the sending application. I know some smtp setups do enforce recipient
>>> validation, but it doesn't seem terribly easy to do this with sendmail. I
>>> wondered if there were some way to do this in python?
>> There is no way of  validating *every* email address you send to using
>> SMTP alone.   Some servers accept every address and bounce later - as
>> you have found out. So for the purpose of the SMTP client, or relaying
>> server,  the address is valid at sending time to those servers.
>>
>> Checking DNS for MX records is a possibility for removing some bad
>> addresses, but it's not fool proof as the RFCs don't require MX
>> records to exist for a domain to be able to receive email.  If no MX
>> records are present, one (and only one!) IP address returned from the
>> domain's A record(s) should be tried.
>>
>> HTH :)
> Thanks, it's at least ammunition for me to say it cannot easily be done. I found 
> this milter
> 
> http://www.jmaimon.com/sendmail/callahead-milter/
> 
> but I think this will cause every send to be checked which is probably not what 
> we need.

I have a client who gets many spurious web sign-ups (they are a 
telephone service). One of the signs of fraud is a bogus email address, 
  so it became very important to detect these.

The only way we could satisfactorily do so was to process the mailbox 
that received the bounces and detect a GUID in the bounce message to 
identify the potentially bogus accounts. This apparently works well 
enough to stop most scammers from making their first 'phone call. In 
general there is no way to tell when sending that an address is or is 
not valid.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From http  Fri Sep  7 11:42:45 2007
From: http (Paul Rubin)
Date: 07 Sep 2007 08:42:45 -0700
Subject: Generating a unique identifier
References: <13e2fgbbpsatm39@corp.supernews.com>
Message-ID: <7x3axq7a8a.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> writes:
> def unique_id():
>     n = 1234567890
>     while True:
>         yield n
>         n += 1

unique_id = itertools.count(1234567890)

> which is easy enough, but I thought I'd check if there was an existing 
> solution in the standard library that I missed. Also, for other 
> applications, I might want them to be rather less predictable.

def unique_id():
   return os.urandom(10).encode('hex')


From wizzardx at gmail.com  Sat Sep  8 14:22:47 2007
From: wizzardx at gmail.com (David)
Date: Sat, 8 Sep 2007 20:22:47 +0200
Subject: How to insert in a string @ a index
In-Reply-To: <18c1e6480709081121h21eac6d2s9d1e06a91ee8d6af@mail.gmail.com>
References: <1189274564.462664.131240@22g2000hsm.googlegroups.com>
	<18c1e6480709081121h21eac6d2s9d1e06a91ee8d6af@mail.gmail.com>
Message-ID: <18c1e6480709081122p7754d9edwbc9f5ca069e8319b@mail.gmail.com>

On 9/8/07, David <wizzardx at gmail.com> wrote:
> > The python doesn't supports t1[keyword_index]="XYZhello" (string
> > object assignment is not supported). How do I get to this problem? Any
> > sugguestions?
>
> Build a new string var using slicing. eg:
>
> t1 = t1[:keyword_index] + "XYZhello" + [keyword_index]
>

Typo. Missed a colon. Should be:

t1 = t1[:keyword_index] + "XYZhello" + [keyword_index:]


From DouhetSukd at gmail.com  Fri Sep 14 03:12:30 2007
From: DouhetSukd at gmail.com (DouhetSukd at gmail.com)
Date: Fri, 14 Sep 2007 00:12:30 -0700
Subject: funny little 190 lines command line math tutor I wrote for my 7-year
	old.
Message-ID: <1189753950.569402.186370@g4g2000hsf.googlegroups.com>

Sadly lacking in multi-media bells and whistles.  But my daughter
actually likes playing with it.

Coded on windows, but no reason it shouldn't work on Linux/OS X.

(hopefully the indentation won't be too mangled by usenet.  apologies
in advance if that is the case)

Enjoy.

Sample session:

D:\user\python>mathtester.py -1 3 -o /+ -r 2
Hello, I am your friendly computer.  I have a math quiz for you

 Problem #1

                 1 +  2 = 3
                                        Answered: 3.  Correct.

 Problem #2

                 3 +  3 = 6
                                        Answered: 6.  Correct.


Congratulations, you got  2 right out of  2


code:

************************************
"""
mathtester.py -h for more help .

HELPS YOUR KIDS TO LEARN MATH WITH INTERACTIVE PROMPTS.  EXAMPLE:

Hello, I am windoze, your friendly computer.  I have a math quiz for
you

 Problem #0

                 4 -  3 = 1
                                        Answered: 1.  Correct.

 Problem #1

                 8 -  6 = 14
                                        Answered:14.  Wrong.  Correct
answer: 2

This will pick two numbers, each between 0 and 10.  It will either add
or substract them.  Any questions with solutions less than zero
or greater than 20 will be rejected and re-created.

You get this by running it with all defaults.  i.e.

c:\>python mathtester.py


to get something like doing the multiplication of 1 to 3 times 10, run

c:\>python mathtester -o * -1 3 -2 10 -H 30

only multiplication '*' will be used, number #1 will be between 0 and
3.  number #2 will be between 0 and 10.  answers greater than 30 will
be rejected.

"""

import os, sys, optparse, random

_module_doc = __doc__

class Writer:
    """write to file and output to console"""
    def  __init__(self,fout):
        self.fout = fout
    def __call__(self,s,echoconsole=True):
        self.fout.write("\n" + s.replace("\t","    "))
        if echoconsole:
            print s

class Worker:

    fout = None
    filename = "test.txt"
    trivial_tolerance_percentage = 40
    accepted_operators = "+-*"

    def formatoptions(self):
        """most of the work is already done by optparser"""
        #filter on acceptable operators.  exit if none found.
        self.operators = [i for i in self.options.operators if i in
self.accepted_operators]
        if not self.operators:
            print ERROR_MSG_OPERATORS % {"supported" :
self.accepted_operators}
            sys.exit()
        #both number range limits are equal.
        if not self.options.numberRange2:
            self.options.numberRange2 = self.options.numberRange


    def  __init__(self):
        self.fout = open(self.filename,"w")
        Worker.writer = Writer(self.fout)
        self.formatoptions()
        self.asked = self.correct = 0
        self.set_asked = set()

    def process(self):
        """main loop - prints greetings, loops on questions, print
result summary and exits"""
        try:
          self.writer(GREETING)
          [self.doTest(cntr) for cntr in
range(0,self.options.repetitions)]
        except KeyboardInterrupt:
          pass
        self.writer(FAREWELL % vars(self))
        return True

    def doTest(self,number):
        """the workhorse function.  randomly picks a question + vets
the solution
        then asks the question and checks the answer"""
        self.writer("\n Problem #%s" % (number+1))

        while True:
            #pick random numbers and operator
            number1  = random.randint(0,self.options.numberRange)
            number2  = random.randint(0,self.options.numberRange2)
            operator =
self.operators[random.randint(0,len(self.operators)-1)]

            if number1 < 2 or number2 < 2 and
random.randint(1,100)>self.trivial_tolerance_percentage:
                #potentially reject trivial problems consisting of
zeros and ones.
                continue

            #flip a coin and put number #1 either right or left -
            #remember that the number ranges can be unequal so there
is a difference
            if random.randint(1,2) % 2:
                problem  = "%2s %s %2s" % (number1,operator,number2)
            else:
                problem  = "%2s %s %2s" % (number2,operator,number1)

            #use eval to get the expected solution
            solution = eval(problem)

            #solution within accepted bounds? if not, build another
problem
            if not ((solution >= self.options.minSolution) and
(solution <= self.options.maxSolution)):
                continue

            #don't ask the same question multiple times...
            if problem in self.set_asked:
                continue
            self.set_asked.add(problem)

            #answers other than digits will be ignored and the prompt
will repeat
            while True:
                try:
                    prompt = "\n\t\t" + problem + " = "
                    self.writer(prompt,False)
                    answer = raw_input(prompt)
                    answer = int("%s" % (answer.strip()))
                except ValueError:
                    continue
                break

            self.asked += 1
            #good, or bad, answer?
            if (answer == solution):
                msg = GOOD_ANSWER % {"answer":answer}
                self.correct += 1
            else:
                msg = BAD_ANSWER % locals()
            self.writer(msg,True)
            return

#not exactly i18n, but it's a start
GOOD_ANSWER         = "\t\t\t\t\tAnswered:%(answer)2s.  Correct."
BAD_ANSWER          = "\t\t\t\t\tAnswered:%(answer)2s.  Wrong.
Correct answer:%(solution)s"
GREETING            = "Hello, I am your friendly computer.  I have a
math quiz for you"
FAREWELL            = "\n\nCongratulations, you got %(correct)2s right
out of %(asked)2s"

HELP_NUMBER1        = "max value for number #1.  this keeps things
from getting too hard or easy. default:%s"
HELP_NUMBER2        = """max value for number #2, defaults to use the
same as number #1.  the reason you may want to have different ranges
is say doing the table of multiplications for 1 to 3 times 10"""
HELP_MATH_OPERATORS = "math operators to use/  defaults: %s"
HELP_REPETITIONS    = "number of questions to ask [%s]"
HELP_MIN_SOLUTION   = "minimum solution you want  [%s].  used to have
simple or hard questions"
HELP_MAX_SOLUTION   = "maximum solution you want  [%s].  used to have
simple or hard questions"

ERROR_MSG_OPERATORS = "no valid operators provided.  supported
operators: %(supported)s"


def getParser():
    """use optparse to prompt on the command line"""
    parser = optparse.OptionParser(usage = _module_doc)

    default = "10"
 
parser.add_option("-1",action="store",type="int",default=default,dest="numberRange",help=HELP_NUMBER1
% (default))

 
parser.add_option("-2",action="store",type="int",dest="numberRange2",help=HELP_NUMBER2)

    default = "+-"
    parser.add_option("-
o",action="store",dest="operators",default=default,help=HELP_MATH_OPERATORS
% default)

    default = "20"
    parser.add_option("-
r",action="store",type="int",dest="repetitions",default=default,help=HELP_REPETITIONS
% default)

    default = "0"
    parser.add_option("-
L",action="store",type="int",dest="minSolution",default=default,help=HELP_MIN_SOLUTION
% default)

    default = "20"
    parser.add_option("-
H",action="store",type="int",dest="maxSolution",default=default,help=HELP_MAX_SOLUTION
% default)

    return parser


def main():
    worker = success = 0
    try:
        (Worker.options, Worker.args) =
getParser().parse_args(sys.argv[1:])
        worker = Worker()
        success = worker.process()
    finally:
        if worker and worker.fout:
            worker.fout.close()
        if success :
            os.startfile(Worker.filename)

if __name__ == "__main__":
    main()



From srikrishnamohan at gmail.com  Sat Sep  1 10:06:55 2007
From: srikrishnamohan at gmail.com (km)
Date: Sat, 1 Sep 2007 19:36:55 +0530
Subject: metaclasses: timestamping instances
Message-ID: <f4cc03640709010706x352f097wdfe9e7fc3612580b@mail.gmail.com>

Hi all,

I have extended a prototype idea from Alex Martelli's resource on
metaclasses regarding time stamping of instances.

<code>
import time
class Meta(type):
    start = time.time()
    def __call__(cls, *args, **kw):
        print 'Meta start time  %e'%cls.start
        x = super(Meta, cls).__call__(*args, **kw)
        current_time = time.time()
        x._created = current_time - Meta.start
        Meta.start = time.time()
        return x

class X(object):
    __metaclass__ = Meta
class Y(X):
    __metaclass__ = Meta
    pass
a = X()
print 'a time stamp %e'%a._created
b = Y()
print 'b time stamp %e'%b._created
print abs(a._created - b._created)
</code>

I donot understand the difference between
1) setting __metaclass__ to 'Meta'  in class Y
2) not setting  __metaclass__  to Meta in class Y

Why is the difference in behaviour of time stamping between 1 & 2 ?

kindly enlighten
regards,
KM
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From fakeaddress at nowhere.org  Thu Sep 20 04:13:58 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Thu, 20 Sep 2007 01:13:58 -0700
Subject: Google and Python
In-Reply-To: <1190235678.019823.315850@o80g2000hse.googlegroups.com>
References: <1190228512.627109.308910@n39g2000hsh.googlegroups.com>
	<ufadnRC5BPZm6GzbnZ2dnUVZ_jOdnZ2d@comcast.com>
	<1190231094.276099.136250@22g2000hsm.googlegroups.com>
	<mailman.781.1190232163.2658.python-list@python.org>
	<1190235678.019823.315850@o80g2000hse.googlegroups.com>
Message-ID: <SYpIi.5291$7P7.2845@newssvr19.news.prodigy.net>

TheFlyingDutchman asked of someone:
> Would you know what technique the custom web server uses
> to invoke a C++ app 

No, I expect he would not know that. I can tell you
that GWS is just for Google, and anyone else is almost
certainly better off with Apache.

> (ditto for Java and Python) CGI is supposed to be too slow
> for large sites.

Sort of. The more queries a site answers, the more benefit
to reducing the per-request overhead. But if one thinks
Google could not afford so much machine time:

     On average, a single query on Google reads hundreds of
     megabytes of data and consumes tens of billions of CPU
     cycles.
     http://labs.google.com/papers/googlecluster.html

Another quote from that paper:

     We also produce all our software in-house [...]

There's a saying in the Navy that there are three ways to
do anything: the right way, the wrong way, and the Navy
way.  How does GWS invoke a Java app? The Google way.

How does Google use Python? As their scripting-language
of choice. A fine choice, but just a tiny little piece.

Maybe Alex will disagree with me. In my short time at
Google, I was uber-nobody.

-- 
--Bryan


From grante at visi.com  Wed Sep 19 11:57:36 2007
From: grante at visi.com (Grant Edwards)
Date: Wed, 19 Sep 2007 15:57:36 -0000
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<dea92f560709021735l2c72d53ew94410fcb33b9b50b@mail.gmail.com>
	<mailman.303.1188779927.28954.python-list@python.org>
	<1190164166.378500.155990@o80g2000hse.googlegroups.com>
	<13f2hctdoob87e5@corp.supernews.com>
Message-ID: <13f2hngbvli8v84@corp.supernews.com>

On 2007-09-19, Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> wrote:
> On Tue, 18 Sep 2007 18:09:26 -0700, TheFlyingDutchman wrote:
>
>> How much faster/slower would Greg Stein's code be on today's
>> processors versus CPython running on the processors of the
>> late 1990's? 
>
> I think a better question is, how much faster/slower would
> Stein's code be on today's processors, versus CPython being
> hand-simulated in a giant virtual machine made of clockwork?

That depends on whether you have the steam-driven model or the
water-wheel driven model.  The steam-drive one is quite a bit
faster once you get it going, but the water-wheel model has a
much shorter start-up time (though it is more weather
dependent).

-- 
Grant Edwards                   grante             Yow! Hey, waiter!  I want
                                  at               a NEW SHIRT and a PONY TAIL
                               visi.com            with lemon sauce!


From gregpinero at gmail.com  Thu Sep 27 16:55:33 2007
From: gregpinero at gmail.com (gregpinero at gmail.com)
Date: Thu, 27 Sep 2007 13:55:33 -0700
Subject: How to Catch Errors in SimpleXMLRPCServer
In-Reply-To: <mailman.1184.1190922958.2658.python-list@python.org>
References: <1190921745.575519.53560@y42g2000hsy.googlegroups.com>
	<mailman.1184.1190922958.2658.python-list@python.org>
Message-ID: <1190926533.435603.245530@o80g2000hse.googlegroups.com>

On Sep 27, 3:55 pm, "Jeff McNeil" <j... at jmcneil.net> wrote:
> Instead of register_function, use register_instance and provide a
> _dispatch method in that instance that handles your exception logging.
>
> Pseudo:
>
> class MyCalls(object):
>     def _dispatch(self, method, args):
>         try:
>             self.getattr(self, method)(*args)
>         except:
>             handle_logging()
>
> server = SimpleXMLRPCServer(("localhost", 8000))
> server.register_instance(MyCalls())
> server.serve_forever()
>
> There might be an easier way... but this works for me.

I wonder if there is something wrong with that.  I get this error on
calling ever method:

Fault 1: 'exceptions.TypeError:cannot marshal None unless allow_none
is enabled' but I can't see anywhere None would be coming from.

-Greg




From zentraders at gmail.com  Wed Sep 12 18:02:05 2007
From: zentraders at gmail.com (Zentrader)
Date: Wed, 12 Sep 2007 22:02:05 -0000
Subject: File Parsing Question
In-Reply-To: <mailman.455.1189630858.2658.python-list@python.org>
References: <mailman.455.1189630858.2658.python-list@python.org>
Message-ID: <1189634525.522225.285930@k79g2000hse.googlegroups.com>


Save the previous line in a variable if you want the previous line
only.
 for line in inp:
   # Perform some operations with line
    if condition something:
         print prev_line
         print line
         break
    # I need to go back one line and use that line value
--> prev_line = line

If you want to do more than that, then use data=inp.readlines() or you
can use
data = open(myfile), "r").readlines().  The data will be stored in
list format so you can access each line individually.



From super.sgt.pepper at gmail.com  Mon Sep 24 00:07:41 2007
From: super.sgt.pepper at gmail.com (Cristian)
Date: Mon, 24 Sep 2007 04:07:41 -0000
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <46f6eb3d$0$32060$426a34cc@news.free.fr>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<mailman.900.1190414696.2658.python-list@python.org>
	<1190415741.380795.259050@y42g2000hsy.googlegroups.com>
	<mailman.904.1190418441.2658.python-list@python.org>
	<1190419720.811685.145880@r29g2000hsg.googlegroups.com>
	<46f6eb3d$0$32060$426a34cc@news.free.fr>
Message-ID: <1190606861.982113.25240@d55g2000hsg.googlegroups.com>

On Sep 21, 5:21 pm, Bruno Desthuilliers
<bdesth.quelquech... at free.quelquepart.fr> wrote:

> Ok, then what about classes ? They also are objects-like-any-other,
> after all. So should we have this syntax too ?
>
> MyClass = class(ParentClass):
>    __init__ = function (self, name):
>      self.name = name
>
> ?-)

For consistency I would suggest this, but Python already does this!

Foo = type('Foo', (object, ), {'bar': lambda self, bar: bar})

I've created a new class and then binded it to name afterwards. If you
can import modules without special syntax and you can create classes
without special syntax, why should functions be treated any
differently?



From exhuma at gmail.com  Tue Sep 18 11:04:29 2007
From: exhuma at gmail.com (exhuma.twn)
Date: Tue, 18 Sep 2007 08:04:29 -0700
Subject: super, apply, or __init__ when subclassing?
In-Reply-To: <mailman.712.1190120462.2658.python-list@python.org>
References: <1190100791.740269.62880@k79g2000hse.googlegroups.com>
	<mailman.712.1190120462.2658.python-list@python.org>
Message-ID: <1190127869.252585.303120@v29g2000prd.googlegroups.com>

On Sep 18, 2:50 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Tue, 18 Sep 2007 04:33:11 -0300, exhuma.twn <exh... at gmail.com> escribi?:
>
> > This is something that keeps confusing me. If you read examples of
> > code on the web, you keep on seeing these three calls (super, apply
> > and __init__) to reference the super-class. This looks to me as it is
> > somehow personal preference. But this would conflict with the "There
> > one way to do it" mind-set.
>
> > So, knowing that in python there is one thing to do something, these
> > three different calls must *do* domething different. But what exactly
> > *is* the difference?
>
> There are a few typos in your examples. If you write them this way:
>

Example 3 was not really a typo on my side. While I was browsing
around for python, I saw this in a code-fragment. So I thought this
was the way to do it. Even though I thought "super(A..." does not make
sense in a "semantic" way. Instead of just accepting this as a fact I
probably should have trusted my gut-feeling and investigate.

Nonetheless the posts (and explanations) here were really helpful for
me to understand what's happening under the hood. But seeing these
three variants of doing (nearly) the same was an itch I finally
decided to scratch. So far I blindly used "Example 1" as it seemed to
work for me.

>
>
> > ------------ Exampel 1: -----------------------------
>
> > class B(A):
> >    def __init__(self, *args):
> >       A.__init__(self, *args)
>
> > ------------ Exampel 2: -----------------------------
>
> > class B(A):
> >    def __init__(self, *args):
> >       apply( A.__init__, (self,) + args)
>
> > ------------ Exampel 3: -----------------------------
>
> > class B(A):
> >    def __init__(self, *args):
> >       super(B,self).__init__(*args)
>
> then 2 is exactly the same as 1 but using a deprecated function. And 3 is  
> the same as 1 only when there is single inheritance involved (and you are  
> using new-style classes). But see the thread "super() doesn't get  
> superclass"
>
> --
> Gabriel Genellina




From tdelaney at avaya.com  Mon Sep 24 06:35:36 2007
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Mon, 24 Sep 2007 18:35:36 +0800
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <1190629152.3385.2.camel@dot.uniqsys.com>
Message-ID: <E4C7BCAB1872014F81CEAACD25699B8C0849A5@301081ANEX2.global.avaya.com>

Carsten Haese wrote:

>> Where the heck does *this* come from?  Neither Python 2.5.1 nor the
>> 3.0alpha has this in `__builtin__`.
> 
> It comes from the 'new' module:
> 
>>>> import new
>>>> help(new.function)
> Help on class function in module __builtin__:
> ...
> 
> Oddly enough, the help misrepresents which module the function is
> coming from.

Not exactly:

>>> help(type(lambda x: x))
Help on class function in module __builtin__:

The function type is builtin, but it doesn't have an exposed name.
`new.function` is simply a name bound to the function type.

Note the help says *class* function ...

Tim Delaney


From thanosv at gmail.com  Wed Sep 19 09:00:14 2007
From: thanosv at gmail.com (thanosv at gmail.com)
Date: Wed, 19 Sep 2007 06:00:14 -0700
Subject: HTTP Protocol Client
In-Reply-To: <1190196612.082912.149690@v23g2000prn.googlegroups.com>
References: <1190196612.082912.149690@v23g2000prn.googlegroups.com>
Message-ID: <1190206814.670422.72230@w3g2000hsg.googlegroups.com>

On Sep 19, 6:10 am, welcomestocont... at gmail.com wrote:
>  Hi,
>
> I am writing http protocol to get some data from servers. If i was
> using my localhost, getting replay from local and if want access other
> remote sites, i am getting error. Please reply it
>
> My localhost client script:::
>
> Code: ( python )
>
> import httplib
>
> h = httplib.HTTP('localhost',80)
>
> h.putrequest('GET','')
>
> h.putheader('User-Agent','Lame Tutorial Code')
>
> h.putheader('Accept','text/html')
>
> h.endheaders()
>
> errcode,errmsg, headers = h.getreply()
>
> print errcode,errmsg, headers
>
> f = h.getfile() # Get file object for reading data
>
> data = f.read()
>
> print data
>
> f.close()
>
> the Reply getting from this::::
>
> 403 Forbidden Date: Tue, 18 Sep 2007 05:20:36 GMT
>
> Server: Apache/2.0.52 (Red Hat)
>
> Accept-Ranges: bytes
>
> Content-Length: 3985
>
> Connection: close
>
> Content-Type: text/html; charset=UTF-8
>
> And some Html script
>
> If I want to access other sites:::
>
> import httplib
>
> h = httplib.HTTP('http://Google.com',80)
>
> h.putrequest('GET','')
>
> h.putheader('User-Agent','Lame Tutorial Code')
>
> h.putheader('Accept','text/html')
>
> h.endheaders()
>
> errcode,errmsg, headers = h.getreply()
>
> print errcode,errmsg, headers
>
> f = h.getfile() # Get file object for reading data
>
> data = f.read()
>
> print data
>
> f.close()
>
> I got the error like:::
>
> Traceback (most recent call last):
> File "c.py", line 6, in ?
> h.endheaders()
> File "/usr/lib/python2.3/httplib.py", line 712, in endheaders
> self._send_output()
> File "/usr/lib/python2.3/httplib.py", line 597, in _send_output
> self.send(msg)
> File "/usr/lib/python2.3/httplib.py", line 564, in send
> self.connect()
> File "/usr/lib/python2.3/httplib.py", line 532, in connect
> socket.SOCK_STREAM):
> socket.gaierror: (-2, 'Name or service not known')
>
> How can I access Remote sites using http protocol . I did'nt write
> server script.
>
> Thanks And Regards
> Allavarapu

1. First try setting the debug level with
h.set_debuglevel(9)
2. nslookup or dig google.com
3. are you behind a firewall ?

4. why not just use urllib.urlopen ? Its a lot easier and sets up all
the headers, and yes it can do POSTs.





From paul at boddie.org.uk  Mon Sep 17 05:51:52 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Mon, 17 Sep 2007 02:51:52 -0700
Subject: SVG to raster conversion.
In-Reply-To: <mailman.619.1189965066.2658.python-list@python.org>
References: <mailman.613.1189958286.2658.python-list@python.org>
	<46ED61E6.9010500@web.de>
	<mailman.619.1189965066.2658.python-list@python.org>
Message-ID: <1190022712.627003.180960@k79g2000hse.googlegroups.com>

On 16 Sep, 19:50, "J. Cliff Dyer" <j... at sdf.lonestar.org> wrote:
>
> Thanks.  I can't find a gimp-python package for gimp-2.x anywhere
> though.  Does such a thing exist?

I noticed that my copy of The GIMP has Python extensions, and looking
at the package details...

http://packages.ubuntu.com/feisty/graphics/gimp-python

...I can see that the gimp-python capabilities are provided by the
source distribution for The GIMP itself. Perhaps you need to either
install a package such as gimp-python for your operating system
distribution or to configure and build The GIMP from source
appropriately: I imagine that there's an --enable-python option (or
something similar) for the configure script which has to find your
Python installation in order for the bindings/extensions to be built.

Paul

P.S. For batch conversion of SVG images I've successfully used the
ksvgtopng program supplied with KDE.



From kar1107 at gmail.com  Thu Sep  6 15:56:47 2007
From: kar1107 at gmail.com (Karthik Gurusamy)
Date: Thu, 06 Sep 2007 12:56:47 -0700
Subject: concise code (beginner)
In-Reply-To: <fbn42h$k37$1@daisy.noc.ucla.edu>
References: <13dsvqrqivtf092@corp.supernews.com>
	<fbmrsg$dsi$1@daisy.noc.ucla.edu>
	<1189020188.842700.50950@d55g2000hsg.googlegroups.com>
	<fbn42h$k37$1@daisy.noc.ucla.edu>
Message-ID: <1189108607.080926.103650@19g2000hsx.googlegroups.com>

On Sep 5, 1:37 pm, James Stroud <jstr... at mbi.ucla.edu> wrote:
> Karthik Gurusamy wrote:
> > On Sep 5, 11:17 am, James Stroud <jstr... at mbi.ucla.edu> wrote:
>
> >> for i in xrange(number_of_reads):
> >>    for dev in devs:
> >>      try:
> >>        _reader = getattr(dev, 'read%d' % i)
> >>        _reader()
> >>      except Exception, e:
> >>        print e
> >>        devs.remove(dev)
>
> > I see in many of the solutions suggested above, the devs sequence/
> > iterator is being modified while iterating. I know it is not defined
> > for interation over dictionary keys. Are they defined for other
> > collections like lists?
>
> Good eye! My code is broke as you have noticed:
>
> py> r = range(5)
> py> for i in r:
> ...   print i
> ...   if i % 2:
> ...     r.remove(i)
> ...
> 0
> 1
> 3
>
> For longer sequences, the algorithm I've used in these cases in the past
> goes something like this:
>
> py> r = range(10, 17)
> py> print r
> [10, 11, 12, 13, 14, 15, 16]
> py>
> py> i = 0
> py> while i < len(r):
> ...   j = r[i]
> ...   print j
> ...   if j % 2:
> ...     r.remove(j)
> ...   else:
> ...     i += 1
> ...
> 10
> 11
> 12
> 13
> 14
> 15
> 16
> py> print r
> [10, 12, 14, 16]
>
> Which would change my problematic code above to:
>
> for i in xrange(number_of_reads):
>    j = 0
>    while j < len(devs):
>      try:
>        _reader = getattr(devs[j], 'read%d' % i)
>        _reader()
>        j += 1
>      except Exception, e:
>        print e
>        devs.remove(dev)
>
> Another way is to make a copy of devs, if devs is short, which makes my
> problematic code into a matter of a "typo"--maybe I can make this claim
> to save some face?
>
> for i in xrange(number_of_reads):
>    for dev in devs[:]:
>      try:
>        _reader = getattr(dev, 'read%d' % i)
>        _reader()
>      except Exception, e:
>        print e
>        devs.remove(dev)
>

Thanks, personally I like this duplicate copy solution. It's cleaner
and easier on the eye/brain. (Moreover the C like first solution
assumes the collection is a sequence, which is not true for dictionary/
set like collections).

That said, it may be a good future language enhancement to define a
reasonable consistent behavior for an iterator over a changing
collection. This occurs quite common when we walk a collection and
usually delete the current item.

For a sequence, what the expected behavior is quite obvious (just
remove this element and go over to the next). For other collections
like dictionary/set, again if the operation is delete, the expected
behavior is obvious. If we are doing insertion, for sequence a well-
defined behavior can be formulated (based on insert before or after
current position -- if after we will see it in the walk, if before we
won't see it) . For dict/set I see this isn't simple (as based on hash
key we may insert ahead or later of the current 'cursor'/position.

Karthik



> James
>
> --
> James Stroud
> UCLA-DOE Institute for Genomics and Proteomics
> Box 951570
> Los Angeles, CA 90095
>
> http://www.jamesstroud.com/




From BjornSteinarFjeldPettersen at gmail.com  Wed Sep 26 00:52:41 2007
From: BjornSteinarFjeldPettersen at gmail.com (thebjorn)
Date: Wed, 26 Sep 2007 04:52:41 -0000
Subject: ANN: PyPE 2.8.7
In-Reply-To: <f082a$46f8e4f1$83aef404$21115@news1.tudelft.nl>
References: <mailman.1037.1190715307.2658.python-list@python.org>
	<f082a$46f8e4f1$83aef404$21115@news1.tudelft.nl>
Message-ID: <1190782361.392001.48790@g4g2000hsf.googlegroups.com>

On Sep 25, 12:37 pm, stef <s.mien... at id.umcn.nl> wrote:
> Josiah Carlson wrote:
> > === What is PyPE? ===
> > PyPE (Python Programmers' Editor) was written in order to offer a
> > lightweight but powerful editor for those who think emacs is too much
> > and idle is too little. Syntax highlighting is included out of the box,
> > as is multiple open documents via tabs.
>
> sounds very good,
> so now I want to try it ...
> ... the windows ansi zip file is corrupted :-(
> ... the unicode version crashes :-(
>
> This is what the log file tells:
> Traceback (most recent call last):
>   File "pype.py", line 110, in ?
>   File "zipextimporter.pyc", line 78, in load_module
>   File "configuration.pyc", line 149, in ?
> Exception: Unable to create config directory: 'G:\\.pype'
>
> I don't have a G-drive ;-)
>
> cheers,
> Stef Mientki

You must be doing it wrong. Works flawlessly for me (no g: drive here
either) -- well, except that it doesn't have Emacs keybindings <wink>.

-- bjorn



From mrabens at gmail.com  Mon Sep 10 17:19:25 2007
From: mrabens at gmail.com (Martoon)
Date: Mon, 10 Sep 2007 14:19:25 -0700
Subject: C API (embedded Python): How to get and set named variables
In-Reply-To: <%igFi.98606$Vk6.77403@newsfe07.phx>
References: <1189447804.880483.175290@50g2000hsm.googlegroups.com>
	<%igFi.98606$Vk6.77403@newsfe07.phx>
Message-ID: <1189459165.540646.305680@o80g2000hse.googlegroups.com>

Thank you!  Just what I needed.

I came across the PyObject_*AttrString() functions earlier when
searching through the docs, and I thought I was in the right area, but
I didn't know what object I was supposed to set the attribute for.
Now I see that it's a module object.  It all makes sense now.  Thanks!



From hniksic at xemacs.org  Tue Sep 25 09:44:25 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Tue, 25 Sep 2007 15:44:25 +0200
Subject: sorting a list numbers stored as strings
References: <mailman.1028.1190696259.2658.python-list@python.org>
Message-ID: <877imeoo5i.fsf@mulj.homelinux.net>

"Delaney, Timothy (Tim)" <tdelaney at avaya.com> writes:

> Yep - appears I must have been misremembering from another language
> (dunno which)

<cough>Tcl</cough>


From bignose+hates-spam at benfinney.id.au  Thu Sep 20 18:02:05 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 21 Sep 2007 08:02:05 +1000
Subject: Tapping into the access of an int instance
References: <mailman.818.1190308885.2658.python-list@python.org>
Message-ID: <87y7f1t2qq.fsf@benfinney.id.au>

"Tor Erik S?nvisen" <torerik81 at gmail.com> writes:

> Does anyone know how to interrupt the lookup of an integer value?

AFAIK, int values *aren't* "looked up", in my understanding of that
term.

Can you explain what events you want to intercept?

> Below is how far I've come... What I want is to tap into the access
> of instance i's value 1...

In many senses "instance i" *is* "value 1".

What "access" do you want to intercept? Can you show some code
examples of things that you would expect to trigger this "access"?
Also, some similar events involving the instance that would *not*
trigger the same thing.

-- 
 \       "The generation of random numbers is too important to be left |
  `\                                 to chance."  -- Robert R. Coveyou |
_o__)                                                                  |
Ben Finney


From mccredie at gmail.com  Tue Sep  4 18:28:20 2007
From: mccredie at gmail.com (Matt McCredie)
Date: Tue, 4 Sep 2007 15:28:20 -0700
Subject: Registering a python function in C
In-Reply-To: <1188861109.041382.178950@d55g2000hsg.googlegroups.com>
References: <1188508874.879215.319400@i13g2000prf.googlegroups.com>
	<1188516423.744038.309700@z24g2000prh.googlegroups.com>
	<1188588784.764658.317570@r34g2000hsd.googlegroups.com>
	<1188592047.542946.249520@57g2000hsv.googlegroups.com>
	<1188861109.041382.178950@d55g2000hsg.googlegroups.com>
Message-ID: <9e95df10709041528i7a6b3ec8k13db81b873341ab7@mail.gmail.com>

> > Is Maya a different python build than what is contained at python.org?
> > If so, I suggest you get your C program to work with the latest python
> > build
> > from python.org.  Then see if you can get it to work with the Maya
> > version.
>
> Ok, did that. If I write a normal C++ program and use the python
> installed in my system, everything works ok and I can call the python
> funtions. From within maya(where the C code is running as a plugin),
> nothing happens. I tried removing my python installation so that only
> the one that comes with maya is running, but then I have no python.h
> or libs to compile against!! I found no help at the maya/python
> newsgroup, is there anyone who has done this before???

I don't really know how maya works with python. Is it possible to just
run arbitrary python code from maya? Can you get the version strings
and stuff?

>>>import sys
>>>print sys.version

That might give you a clue. It might just be that you need to compile
against a different version of Python. You could always just download
the different versions of Python and see if the included Python.h and
Python.lib work. I would go in this order: 2.3, 2.4, 2.2, 2.5.

Matt


From george.sakkis at gmail.com  Tue Sep  4 13:00:14 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: Tue, 04 Sep 2007 17:00:14 -0000
Subject: Python is overtaking Perl
In-Reply-To: <mailman.22.1188909362.2658.python-list@python.org>
References: <1188865943.238573.218750@w3g2000hsg.googlegroups.com>
	<mailman.22.1188909362.2658.python-list@python.org>
Message-ID: <1188925214.716404.219920@22g2000hsm.googlegroups.com>

On Sep 4, 8:35 am, Jean-Paul Calderone <exar... at divmod.com> wrote:
> On Tue, 04 Sep 2007 00:32:23 -0000, Ben <benyan... at gmail.com> wrote:
> >Here are the statistics from Google Trends:
>
> >http://benyang22a.blogspot.com/2007/09/perl-vs-python.html
>
> >From the graph, it seems more accurate to say that Perl is undertaking Python.
>
> Jean-Paul

And to make it even more accurate, "Perl is undertaking Python in
India", since that's where the difference in favor of Python comes
from.

George



From iapain at gmail.com  Sat Sep  1 03:17:14 2007
From: iapain at gmail.com (iapain)
Date: Sat, 01 Sep 2007 07:17:14 -0000
Subject: Python Unicode to String conversion
In-Reply-To: <1188600916.528901.189680@d55g2000hsg.googlegroups.com>
References: <1188600916.528901.189680@d55g2000hsg.googlegroups.com>
Message-ID: <1188631034.968347.116170@d55g2000hsg.googlegroups.com>

First make sure your DB encoding is UTF-8 not the latin1

> The error I keep having is something like this:
> ERREUR:  S?quence d'octets invalide pour le codage ?UTF8? : 0xe02063

then try this:

def smart_str(s, encoding='utf-8', errors='strict'):
    """
    Returns a bytestring version of 's', encoded as specified in
'encoding'.
    """
    if not isinstance(s, basestring):
        try:
            return str(s)
        except UnicodeEncodeError:
            return unicode(s).encode(encoding, errors)
    elif isinstance(s, unicode):
        return s.encode(encoding, errors)
    elif s and encoding != 'utf-8':
        return s.decode('utf-8', errors).encode(encoding, errors)
    else:
        return s





From wizzardx at gmail.com  Thu Sep 27 03:57:58 2007
From: wizzardx at gmail.com (David)
Date: Thu, 27 Sep 2007 09:57:58 +0200
Subject: Google and Python
In-Reply-To: <004001c800d2$e96e20e0$03000080@hendrik>
References: <1190228512.627109.308910@n39g2000hsh.googlegroups.com>
	<1190235678.019823.315850@o80g2000hse.googlegroups.com>
	<mailman.887.1190402873.2658.python-list@python.org>
	<7xejgr68pm.fsf@ruckus.brouhaha.com>
	<slrnffetai.ijq.nick@irishsea.home.craig-wood.com>
	<mailman.1031.1190705678.2658.python-list@python.org>
	<7xps07w5g3.fsf@ruckus.brouhaha.com>
	<mailman.1088.1190791009.2658.python-list@python.org>
	<slrnffk82a.krt.nick@irishsea.home.craig-wood.com>
	<004001c800d2$e96e20e0$03000080@hendrik>
Message-ID: <18c1e6480709270057j3c1ad69dn21a6d98b07a616f9@mail.gmail.com>

> > It is trivial to pass a socket to a new thread or a forked child - you
> > don't need this mechanism for that.  It doesn't work on different
> > machines though - it has to be on the same machine.
>
> 8< ------------- nice explanation by Nick-----------------------
>
> How does a very large volume site work then? - there must be some
> way of sharing the load without bottlenecking it through one machine?
>

Large sites do load balancing (caching, dns round robin, reverse
proxies, etc) over many hosts. Passing connection handles around on a
single host is a different type of optimization.

See this link for info on how Wikipedia handles their load-balancing:

http://en.wikipedia.org/wiki/Wikipedia#Software_and_hardware


From bscrivener42 at gmail.com  Fri Sep  7 22:58:16 2007
From: bscrivener42 at gmail.com (BartlebyScrivener)
Date: Sat, 08 Sep 2007 02:58:16 -0000
Subject: Is a Borg rebellion possible? (a metaclass question)
In-Reply-To: <mailman.244.1189191248.2658.python-list@python.org>
References: <1189168282.665210.260840@19g2000hsx.googlegroups.com>
	<mailman.220.1189171663.2658.python-list@python.org>
	<1189180478.257790.60160@g4g2000hsf.googlegroups.com>
	<mailman.244.1189191248.2658.python-list@python.org>
Message-ID: <1189220296.951992.232570@k79g2000hse.googlegroups.com>

On Sep 7, 1:53 pm, Steve Holden <st... at holdenweb.com> wrote:

> All you really need is to create your SplinterBorgs with appropriate
> group names, you don't neef subclasses at all:

oops, I tried this once and the link broke. I'll try tinyurl.

Dang. With that subject heading I thought this was about some post-
Singularity, Python-programmed cyborgs rising up to take over the
universe.

See, e.g.
How To Survive A Robot Uprising
http://tinyurl.com/yrk5pw

I am officially misled!

rd




From DustanGroups at gmail.com  Fri Sep  7 07:47:12 2007
From: DustanGroups at gmail.com (Dustan)
Date: Fri, 07 Sep 2007 11:47:12 -0000
Subject: unexpected behavior: did i create a pointer?
In-Reply-To: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>
References: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>
Message-ID: <1189165632.401620.220530@w3g2000hsg.googlegroups.com>

On Sep 7, 3:07 am, gu <pistacc... at gmail.com> wrote:
> hi to all!

Hi!

> after two days debugging my code, i've come to the point that the
> problem was caused by an unexpected behaviour of python. or by lack of
> some information about the program, of course! i've stripped down the
> code to reproduce the problem:
>
> <code>
> a = {}
>
> for x in range(10):
>      for y in range(10):
>          a[x,y] = "0"
>
> copyOfA = a
>
> def functionA(x,y):
>      print a[x,y],
>      copyOfA[x,y] = "*"
>      print a[x,y],copyOfA[x,y]
>
> for x in range(10):
>      for y in range(10):
>          functionA(x,y)
>
> </code>
>
> now, in the second "for" cycle and in functionA() i only 'touch' copyOfA
> (altering it). as i don't touch the variable "a", i expect it not to be
> affected by any change, but copyOfA acts like a pointer to a and
> altering copyOfA's values result in altering the values of "a", so the
> result that i expect is:
> 0 0 *
> 0 0 *
> 0 0 *
> 0 0 *
> [..]
>
> but i get:
> 0 * *
> 0 * *
> 0 * *
> 0 * *
> [..]
>
> what's going on?
> thanks in advance.

Welcome to Python! You might want to look at the documentation:
http://docs.python.org/

And the tutorials:
http://docs.python.org/tut/tut.html

Leaping into python from another language without looking at the above
documentation is not wise, since python has both a very different
structure and a somewhat different philosophy from other languages.



From korovev76 at gmail.com  Thu Sep 20 06:01:29 2007
From: korovev76 at gmail.com (korovev76 at gmail.com)
Date: Thu, 20 Sep 2007 03:01:29 -0700
Subject: ONYX
In-Reply-To: <46f1726f$0$15276$426a74cc@news.free.fr>
References: <1190211769.268351.79500@d55g2000hsg.googlegroups.com>
	<46f1726f$0$15276$426a74cc@news.free.fr>
Message-ID: <1190282489.824709.29050@r29g2000hsg.googlegroups.com>

On 19 Set, 21:02, Bruno Desthuilliers
<bdesth.quelquech... at free.quelquepart.fr> wrote:

>
> I don't know what's "onyx-style" xml,

i'm not used to xml, so for me onyx is just a mess...
http://www.onyx.com/Products/xml.asp

> but if it's xml, any xml parser
> will parse it, and any validating parser should be able to validate it
> given the correct DTD.

For example?where do I find a good validating parser?


thanx again




From uymqlp502 at sneakemail.com  Mon Sep  3 22:43:49 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Mon, 03 Sep 2007 19:43:49 -0700
Subject: programming by contract using "decorators"
Message-ID: <1188873829.158006.131900@y42g2000hsy.googlegroups.com>

In the thread I started a few days ago, I was told that "programming
by contract," could be done with "decorators." I was skeptical that
this was a good approach, but as an exercise, I tried to code it up in
a reasonably elegant form. I'd like to think I succeeded -- and I must
admit that those who told me it could be done with decorators were
right.

My code is shown below. It shows a function called "myfunction," and
another function for testing it called "myfunction_test." More
detailed explanation follows the listing. Comments and feedback are
welcome, of course.

#!/usr/bin/env python

def contract(test, check=0):
    "enforce programming by contract"

    if check: return test

    def null(func):
        def null2(*args, **keys):
            return func(*args, **keys)
        return null2

    return null

def getarg(args, keys, num, name):

    if name in keys: return keys[name]
    return args[num]

def myfunction_test(myfunction):
    "contract test for function myfunction"

    def test(*args, **keys):

        x = getarg(args, keys, 0, 'x')
        y = getarg(args, keys, 1, 'y')
        z = getarg(args, keys, 2, 'z')

        # preconditions would go here, if there were any

        result = myfunction(x, y, z) # execute function

        assert result == x**2 + 3 * y + z # post-condition

        return result

    return test

#=======================================

CheckContracts = 1

@contract(myfunction_test, CheckContracts)

def myfunction(x, y, z): return x**2 + 3 * y + z

print myfunction(4, z=1, y=3)

------------------- end of listing ---------------------

Here's what is going on. At the bottom of the listing, you will see
the definition of a function called "myfunction," followed by a call
of the function. It's a trivial function, but I gave it three
arguments just to test passing them out of order by keyword.

Just above the definition of "myfunction" is a "decorator" called
"contract," which takes two arguments. The first argument specifies
the name of the self-test contract function, which is
"myfunction_test" in this case. The second argument is used to enable
or disable the contract tests.

Note that I could have just called the decorator "myfunction_test" and
omitted the "contract" decorator, but I think this form, although
slightly less efficient, is more readable. It also allows the enabling/
disabling logic to be put in one function rather than having to repeat
it in every contract test function.

Dealing with the arguments was not a trivial matter -- at least not
for me. I had to experiment a bit to get it right. The "getarg"
function is simply a utility for parsing the ordered and keyword
arguments. It's very simple, but if something like this already
exists, please let me know. Thanks.



From duncan.booth at invalid.invalid  Mon Sep 10 04:57:42 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 10 Sep 2007 08:57:42 GMT
Subject: Python syntax wart
References: <fbvvil$7dj$1@lust.ihug.co.nz> <5khh6nF3i5nuU1@mid.uni-berlin.de>
	<46E390B7.2080808@web.de> <fc0518$aa2$5@lust.ihug.co.nz>
	<5ki2sdF3nr68U1@mid.individual.net> <fc2c52$i1l$3@lust.ihug.co.nz>
	<5kk8p0F3vfqqU1@mid.uni-berlin.de> <fc2t89$rik$4@lust.ihug.co.nz>
	<5kkcmvF3vfqqU3@mid.uni-berlin.de>
	<fc2uls$shh$2@lust.ihug.co.nz> <46E50239.7050007@web.de>
Message-ID: <Xns99A7651AD5055duncanbooth@127.0.0.1>

Stefan Behnel <stefan.behnel-n05pAM at web.de> wrote:

> This actually sounds somewhat pointless to me. If complex things don't
> fit into one line, a good way to deal with it is not to insist on
> making them a single statement.
> 

Or make them into a single method/function call. I would post some pseudo-
code replacing the TheProduct conditions with a single call to a 
meaningfully named method except I haven't got the faintest idea what it is 
trying to achieve.


From michele.simionato at gmail.com  Thu Sep 20 00:40:33 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Thu, 20 Sep 2007 04:40:33 -0000
Subject: Mixin classes and single/multiple inheritance
In-Reply-To: <87tzpquhol.fsf@benfinney.id.au>
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au>
	<46f0fba0$0$29605$426a34cc@news.free.fr>
	<1190199134.791808.267110@22g2000hsm.googlegroups.com>
	<mailman.778.1190225664.2658.python-list@python.org>
	<1190256493.827576.139470@r29g2000hsg.googlegroups.com>
	<877immvye0.fsf_-_@benfinney.id.au>
	<1190257864.945639.199230@k79g2000hse.googlegroups.com>
	<87tzpquhol.fsf@benfinney.id.au>
Message-ID: <1190263233.710025.109280@d55g2000hsg.googlegroups.com>

On Sep 20, 5:41 am, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> Michele Simionato <michele.simion... at gmail.com> writes:
> > Ben Finney wrote:
> > > What do you see as an appropriate use of mixin classes, and what
> > > an abuse?
>
> > An example of fine usage of mixin is Tkinter; an example of bad
> > usage if Zope 2.
>
> Which parts of those two very large code sets do I need to look at to
> see the examples you have in mind? I was hoping you could demonstrate
> with short code examples.

Unfortunately you see the issue only when you program in
the large. Take for instance the Plone BaseContent class; I believe
its MRO contains something like 35 classes (I don't remember
the exact number now) in a multiple inheritance hierarchy.
Instances have some something like 400+ methods and attributes.
Now try to understand from which of the parent classes the
attributes came. For Tkinter things are much easier, see
the effbot "Introduction to Tkinter" for a discussion of
the mixin classes it uses.  Then try something like
inspect.getmro(Tkinter.Label) , there are only 7 classes
in the hierarchy. Notice that even with single inheritance
you can run in deep hierarchies (Java docet).The problem,
as Guido once said, is the "inheritance is overrated".

   Michele Simionato




From mccredie at gmail.com  Mon Sep 10 14:19:30 2007
From: mccredie at gmail.com (Matimus)
Date: Mon, 10 Sep 2007 18:19:30 -0000
Subject: Question about PEP 8
In-Reply-To: <mailman.333.1189442375.2658.python-list@python.org>
References: <mailman.333.1189442375.2658.python-list@python.org>
Message-ID: <1189448370.564030.13120@19g2000hsx.googlegroups.com>

> will Py3K change the standard library names in order to follow PEP 8?)

Just continue down the list of PEPs and you will find the answer:

http://www.python.org/dev/peps/pep-3108/#modules-to-rename

This covers built-in modules. It doesn't cover 3rd party modules, like
wx. Most likely you will still see pep8 violations in non-standard
modules.

As for following or not following pep8 in conjunction with 3rd party
modules. Just make your code look nice. Don't go out of your way to
follow pep8 if it means that there will be a mix of styles that will
be confusing. If you are overloading a class that is part of wx I
would use the same style that wx uses. The reasoning being that people
who might use that class would probably see it as just another wx
class, and expect it to look and behave a certain way. Don't
dissapoint them.

Matt



From mensanator at aol.com  Sun Sep 16 15:05:29 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: Sun, 16 Sep 2007 12:05:29 -0700
Subject: Try this
In-Reply-To: <13eqsdfsfvsa16f@corp.supernews.com>
References: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>
	<13eqsdfsfvsa16f@corp.supernews.com>
Message-ID: <1189969529.652871.19280@50g2000hsm.googlegroups.com>

On Sep 16, 1:10?pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Sun, 16 Sep 2007 01:46:34 -0700, GeorgeRXZ <george... at gmail.com>
> declaimed the following in comp.lang.python:
>
> > Then Open the Notepad and type the following sentence, and save the
> > file and close the notepad. Now reopen the file and you will find out
> > that, Notepad is not able to save the following text line.
>
> > Well you are speed
>
> > This occurs not only with above sentence but any sentence that has
>
> > 4 3 3 5 (sequence of characters: Well=4 you=3 are=3 speed=5)
>
>         I tried. I also opened the saved file in SciTE...
> And the text WAS there...
>
>         It is Notepad that can not properly render what it,
> itself, saved.

C:\Documents and Settings\mensanator\My Documents>type huh.txt
Well you are speed

Yes, file was saved correctly.
But reopening it shows 9 unprintable characters.
If I copy those to a new file (huh1.txt):

C:\Documents and Settings\mensanator\My Documents>type huh1.txt
?????????

But wait...the new file is 20 characters, not 9.

09/16/2007  01:44 PM                18 huh.txt
09/16/2007  01:54 PM                20 huh1.txt

C:\Documents and Settings\mensanator\My Documents>dump huh.txt
huh.txt:
00000000  5765 6c6c 2079 6f75 2061 7265 2073 7065 Well you are spe
00000010  6564                                    ed

Here's what it's actually doing:

C:\Documents and Settings\mensanator\My Documents>dump huh1.txt
huh1.txt:
00000000  fffe 5765 6c6c 2079 6f75 2061 7265 2073 .~Well you are s
00000010  7065 6564                               peed




From pyth0nc0d3r at gmail.com  Fri Sep 14 17:59:50 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Fri, 14 Sep 2007 16:59:50 -0500
Subject: Just bought Python in a Nutshell
In-Reply-To: <eb79828c0709141432t582ddccbsda4750a4011666a9@mail.gmail.com>
References: <eb79828c0709132112o5a3e7137n5ae5cd55e3e0b839@mail.gmail.com>
	<mailman.520.1189748935.2658.python-list@python.org>
	<1189784843.896396.108960@g4g2000hsf.googlegroups.com>
	<eb79828c0709141312v588ef074w25c2200c37951098@mail.gmail.com>
	<59f9c5160709141412q1098a4cbi989b6eed2f2cc899@mail.gmail.com>
	<eb79828c0709141432t582ddccbsda4750a4011666a9@mail.gmail.com>
Message-ID: <eb79828c0709141459y264bc21fg4fcd17a4217cad65@mail.gmail.com>

Wow I just got it, and its nice doesn't even look used god damn. :D.

On 9/14/07, Lamonte Harris <pyth0nc0d3r at gmail.com> wrote:
>
> Lol, you bought it,  dude theres not one left imho.  When I bought it, it
> still said 1 More left Lol...mines should be her no less then a hour -.-...
> Taking SO LONG.
>
> On 9/14/07, Danyelle Gragsone <ladynikon at gmail.com> wrote:
> >
> > Luckily that site still had one left .. so i brought it :D.  I can
> > always use another good and CHEAP book.
> >
> > Danyelle
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>
>
-------------- next part --------------
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From python at rcn.com  Tue Sep 18 20:59:02 2007
From: python at rcn.com (Raymond Hettinger)
Date: Tue, 18 Sep 2007 17:59:02 -0700
Subject: Sets in Python
In-Reply-To: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
Message-ID: <1190163542.585160.16230@w3g2000hsg.googlegroups.com>

On Sep 18, 5:39 pm, sapsi <saptarshi.g... at gmail.com> wrote:
> I recently tried using the set function in Python and was surprised to
> find that
>
> a=[ 1, 2,3, [1,2] ]
>
> doesn't work with 'set', throwing TyperError (unhashable exception). I
> found out that this is because lists can't be hashed.
> So,this implies 'a' cannot be a set in python which i think is quite
> unfortunate, after all 'a' does look like a mathematical set.

This is written as:

a = set([1, 2, 3, frozenset([1, 2])])



> This is not related, but is there i neat way (without pop and list
> comprehension) to convert a set into a list?

list(a)


Raymond



From stef.mientki at gmail.com  Thu Sep 13 18:25:54 2007
From: stef.mientki at gmail.com (stef mientki)
Date: Fri, 14 Sep 2007 00:25:54 +0200
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <46e9b09c$0$7685$9b4e6d93@newsspool2.arcor-online.net>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>	<1189604018.520338.162520@57g2000hsv.googlegroups.com>	<mailman.486.1189693844.2658.python-list@python.org>	<13eim00ha4lf356@corp.supernews.com>	<Xns99AA68B097778OKB@199.45.49.11>	<5ktfb5F5ctrvU1@mid.individual.net>	<46e98e01$0$30383$9b4e6d93@newsspool4.arcor-online.net>	<46e9921e$0$26251$426a74cc@news.free.fr>	<46e995d1$0$16120$9b4e6d93@newsspool1.arcor-online.net>	<mailman.503.1189715816.2658.python-list@python.org>
	<46e9b09c$0$7685$9b4e6d93@newsspool2.arcor-online.net>
Message-ID: <46E9B8F2.9090506@gmail.com>


>>> Certainly, but again: Such main people are not the intended audience. 
>>> The code is for people that know how to read these equations. I think 
>>> a general rule of (any form of) writing is to write with your audience 
>>> in mind. I always do that and happily, that audience is usually naked.
>>>
>>>
>>>   
>>>       
>> Wouldn't Mathematica, Maple or MathCad be a far better choice ?
>>
>>     
> Well, those cost money ...
>
>   
Indeed, so I wondered why there isn't open source alternative (at least 
I didn't find one).
some Latex derivate + wxPython + Python could do the job
> Hey, why am *I* arguing here at all? This isn't my thread!
> Well, I guess the scientist in me felt tickled.
>   
Well, i'm on the sideline too ;-)
cheers,
Stef


From tec at knology.net  Tue Sep 11 09:22:19 2007
From: tec at knology.net (Tim)
Date: Tue, 11 Sep 2007 06:22:19 -0700
Subject: memcpy
In-Reply-To: <5knhtpF4b65dU6@mid.uni-berlin.de>
References: <1189449530.171049.323230@22g2000hsm.googlegroups.com>
	<5klnsbF3vfqqU10@mid.uni-berlin.de>
	<1189512598.410810.224340@y42g2000hsy.googlegroups.com>
	<5knhtpF4b65dU6@mid.uni-berlin.de>
Message-ID: <1189516939.394375.248830@d55g2000hsg.googlegroups.com>

On Sep 11, 8:01 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Tue, 11 Sep 2007 05:09:58 -0700, Tim wrote:
> > On Sep 10, 3:31 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> >> On Mon, 10 Sep 2007 11:38:50 -0700, Tim wrote:
> >> > How do I memcpy from a pointer to an array of floats in python?
>
> >> > I get errors: NameError: global name 'row' is not defined
>
> >> Well than the (global) name `row` is not defined.  Quite clear message,
> >> isn't it?  ;-)
>
> >> > I want to be able to get the row[i] array element. In C I would
> >> > normally place the address of row as the first argument.
>
> >> > cdll.msvcrt.memcpy( row, pData, 256 )
>
> >> > If I define row as the following I also get the following error:
>
> >> > row = ones( TOTAL_PARAMETER_ENTRIES, dtype=float )
>
> >> > ArgumentError: argument 1: <type 'exceptions.TypeError'>: Don't know
> >> > how to convert parameter 1
>
> >> You don't give enough information so we have to guess.  For example I
> >> guess the `ones()` function comes from one of the packages `numeric`,
> >> `numarray` or `numpy`!?
>
> >> This function returns a Python object.  You can't use arbitrary Python
> >> objects with `ctypes`.  `memcpy` expects a pointer not an object.
>
> > Can I initialize something in Python that I can get access to it's
> > pointer?
>
> "It's pointer"?  Then you have a pointer to a structure that represents
> the Python object but still no idea what data is at that pointer.  This is
> an implementation detail of the Python version and of the particular
> object.
>
> > Here is what I would like to write:
>
> > shared_memory_pointer = windll.kernel32.MapViewOfFile(hMapObject,
> > FILE_MAP_ALL_ACCESS,
> >             0, 0, TABLE_SHMEMSIZE)
>
> > memcpy( self.data, shared_memory_pointer, my_size )
>
> I haven't tested but it should be possible to declare the return type of
> `windll.kernel32.MapViewOfFile()` as ``ctypes.POINTER(ctypes.c_double *
> 256)`` and then do:
>
> test_data = numpy.ones(1000)
> shared_memory_pointer.contents[0:256] = test_data[0:256]
>
> Ciao,
>         Marc 'BlackJack' Rintsch- Hide quoted text -
>
> - Show quoted text -

Is this what you mean? Python did not like the word c_types in front
of POINTER. Do you know why? How can I re-declare a function's return
type if it is declared somewhere else?

        test_data = numpy.ones(1000)
        shared_memory_pointer = POINTER(c_float*256)
        shared_memory_pointer =
windll.kernel32.MapViewOfFile(hMapObject, FILE_MAP_ALL_ACCESS,
            0, 0, TABLE_SHMEMSIZE)
        test_data[0:256]= shared_memory_pointer.contents[0:256]

        print 'data:', test_data[0]






From bignose+hates-spam at benfinney.id.au  Tue Sep 18 01:24:21 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 18 Sep 2007 15:24:21 +1000
Subject: super() doesn't get superclass
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
Message-ID: <87zlzkzgu2.fsf@benfinney.id.au>

Evan Klitzke <evan at yelp.com> writes:

> On Tue, 2007-09-18 at 14:15 +1000, Ben Finney wrote:
> > Why does the documentation of 'super' say that it returns the
> > superclass when *that's not true*? It doesn't return the
> > superclass, it returns the next class in the MRO, whether that's a
> > superclass or not.
> 
> The next class in the MRO _is_ a superclass. Maybe not the way
> you've defined it in your own code, but certainly of the new class
> you created with MI.

If I define a class hierarchy as follows::

    class A(object): pass
    class B(object): pass
    class C(A): pass
    class D(B): pass

is it true to say that "D is a superclass of A"? No, because they're
entirely unrelated except that they inherit from 'object'. The
superclass of 'A' is 'object'.

How about this:

    class E(C, D): pass

In this instance, the MRO now has D following A; but the superclass of
'A' is still 'object'.

You seem to be saying that now suddenly D *is* a superclass of
A. That's certainly not what users will think of when they think
"superclass" though.

> > Actually, even that's not true. The error message "AttributeError:
> > 'super' object has no attribute 'bazfunc'" makes it clear that
> > 'super' actually returns not the superclass, but a 'super' object,
> > whatever that's supposed to be.
> 
> No, super really does return a class. What makes you think that
> super returns a special sort of object?

    >>> super(A)
    <super: <class 'A'>, NULL>
    >>> super(A).__class__
    <type 'super'>

What I expect, incidentally, is that a function documented as "returns
the superclass of 'type'" would actually return that class (in this
case, the type 'object'), not an object of 'super' type.

> > After reading the rest of the article, I'm amazed that 'super' as
> > currently implemented is in Python at all. I agree with the author
> > that it's useless unless *everyone* uses it for *everything*, and
> > even then it's pretty limited.
> 
> I don't see what the problem is. If you don't use super, then you can
> break the inheritance chain

I don't want to break the inheritance chain. I want the superclass,
not the "next class in the MRO".

Orthogonally to that, I think it's madness to write a function for
"return the next class in the MRO for 'type'" and document it as
"return the superclass of 'type'".

Am I mistaken in thinking that "superclass of foo" is equivalent to
"parent class of foo"? If so, I'd lay heavy odds that I'm not alone in
that thinking.

-- 
 \           "Laugh and the world laughs with you; snore and you sleep |
  `\                                                alone." ?anonymous |
_o__)                                                                  |
Ben Finney


From surye80 at gmail.com  Tue Sep 18 19:42:38 2007
From: surye80 at gmail.com (Vince Castellano)
Date: Tue, 18 Sep 2007 23:42:38 -0000
Subject: Custom PYTHONPATH not being seen by -m
Message-ID: <1190158958.441168.307740@q3g2000prf.googlegroups.com>

Hello,

I am running RHEL5, with Python 2.4.3. I do not experience this
problem on my other machines, which are 2.5.

The following should demonstrate my issue:

[16:38][vince:~]$ python -m srctools.symbol_replace -h
python: module srctools.symbol_replace not found
[16:40][vince:~]$ python
Python 2.4.3 (#1, Dec 11 2006, 11:38:52)
[GCC 4.1.1 20061130 (Red Hat 4.1.1-43)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import srctools.symbol_replace
>>> srctools.symbol_replace
<module 'srctools.symbol_replace' from '/usr/local/pymodules/srctools/
symbol_replace.py'>
>>>
[16:41][vince:~]$ echo $PYTHONPATH
/usr/local/pymodules


Thank you,
Vince



From http  Thu Sep 20 10:57:55 2007
From: http (Paul Rubin)
Date: 20 Sep 2007 07:57:55 -0700
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<fcq352$u0a$1@sea.gmane.org>
	<mailman.786.1190246955.2658.python-list@python.org>
	<1190263363.496695.83300@57g2000hsv.googlegroups.com>
	<mailman.802.1190292987.2658.python-list@python.org>
Message-ID: <7xwsulv0y4.fsf@ruckus.brouhaha.com>

"Chris Mellon" <arkanes at gmail.com> writes:
> No. Python has threads, and they're wrappers around true OS level
> system threads. What the GIL does is prevent *Python* code in those
> threads from running concurrently.

Well, C libraries can release the GIL if they are written for thread
safety, but as far as I know, most don't release it.  For example I
don't think cElementTree releases the GIL, and it's a huge CPU
consumer in some of the code I run, despite being written in C pretty
carefully.  Also, many of the most basic builtin types (such as dicts)
are implemented in C and don't release the GIL.

> Very, very few operations are CPU bound these days, and even fewer of
> the ones were Python is involved. The largest benefits to the desktop
> user of multiple cores are the increase in cross-process performance
> (multitasking), not single applications.

If you add up all the CPU cycles being used by Python everywhere,
I wonder how many of them are on desktops and how many are on servers.

> Python is not especially fast in terms of pure CPU time, so
> if you're CPU bound anyway moving your CPU bound code into C (or
> something else) is likely to reap far more benefits - and sidestepping
> the GIL in the process.

If moving code into C is so easy, why not move all the code there
instead of just the CPU-bound code?  Really, coding in C adds a huge
cost in complexity and unreliability.  Python makes life a lot better
for developers, and so reimplementing Python code in C should be seen
as a difficult desperation measure rather than an easy way to get
speedups.  Therefore, Python's slowness is a serious weakness and not
just a wart with an easy workaround.

> In short, I think any problem that would be directly addressed by
> removing the GIL is better addressed by other solutions.

It does sound like removing the GIL from CPython would have very high
costs in more than one area.  Is my hope that Python will transition
from CPython to PyPy overoptimistic?


From bronger at physik.rwth-aachen.de  Thu Sep  6 01:04:55 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Thu, 06 Sep 2007 07:04:55 +0200
Subject: Any syntactic cleanup likely for Py3? And what about doc
	standards?
References: <46DEFD2E.5050205@sbcglobal.net>
	<mailman.112.1189022368.2658.python-list@python.org>
	<87tzq898e2.fsf@wilson.homeunix.com>
	<mailman.118.1189034379.2658.python-list@python.org>
	<87ejhc8z23.fsf@wilson.homeunix.com> <zwKDi.10347$kI5.1097@trnddc08>
Message-ID: <87y7fk75ag.fsf@wilson.homeunix.com>

Hall?chen!

Alan Isaac writes:

> Torsten Bronger wrote: 
>
> [...]
>
>> Their only flaw is that they are not "virtual" (in C++ speak).
>> In other words, you can't pass a "self" parameter to them.
>
> http://www.kylev.com/2004/10/13/fun-with-python-properties/

Thanks, I knew the possibility of using another level of indirection
vir explicit __set and __get methods but I haven't seen a solution
with lambda yet.  I think on ActiveState's Python Cookbook site
there was a quite longish solution, too.

Then I formulate it more precisely: The "self" parameter is passed
to the setters and getters, however, it is not used for calling the
"correct" ones.  "Correct" seems to be in the eye of the beholder:
The Python designers apparently intentionally chose this odd
"semi-static" behaviour of "property".  But I think a fully virtual
behaviour would fit better into the Python mentality, it is easier
to explain, and it has more use cases.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From martinmichel at ame-electroplating.com  Sun Sep 16 11:54:34 2007
From: martinmichel at ame-electroplating.com (Martin M.)
Date: Sun, 16 Sep 2007 15:54:34 -0000
Subject: Parsing problems: A journey from a text file to a directory tree
Message-ID: <1189958074.670245.17910@n39g2000hsh.googlegroups.com>

Hi everybody,

Some of my colleagues want me to write a script for easy folder and
subfolder creation on the Mac.

The script is supposed to scan a text file containing directory trees
in the following format:

[New client]
|-Invoices
|-Offers
|--Denied
|--Accepted
|-Delivery notes

As you can see, the folder hierarchy is expressed by the amounts of
minuses, each section header framed by brackets (like in Windows
config files).

After the scan process, the script is supposed to show a dialog, where
the user can choose from the different sections (e.g. 'Alphabet',
'Months', 'New client' etc.). Then the script will create the
corresponding folder hierarchy in the currently selected folder (done
via AppleScript).

But currently I simply don't know how to parse these folder lists and
how to save them in an array accordingly.

First I thought of an array like this:

dirtreedb = {'New client': {'Invoices': {}, 'Offers': {'Denied': {},
'Accpeted': {}}, 'Delivery notes': {}}}

But this doesn't do the trick, as I also have to save the hierarchy
level of the current folder as well...

Argh, I really don't get my head around this problem and I need your
help. I have the feeling, that the answer is not that complicated, but
I just don't get it right now...

Your desperate,

Martin



From timr at probo.com  Tue Sep 11 03:58:33 2007
From: timr at probo.com (Tim Roberts)
Date: Tue, 11 Sep 2007 07:58:33 GMT
Subject: Using a time duration to print out data where every 2 seconds is
	a pixel
References: <1189427545.322679.260970@r29g2000hsg.googlegroups.com>
	<slrnfeaips.m47.hat@se-162.se.wtb.tue.nl>
	<mailman.319.1189432713.2658.python-list@python.org>
	<1189436278.456311.128260@22g2000hsm.googlegroups.com>
Message-ID: <6hice3hjf9r8tv6ru5pm7rhldge0cd3pra@4ax.com>

cjt22 at bath.ac.uk wrote:

>Thanks however I am still having a problem using the time module for
>arithmetic
>
>My string times are of values such as 09:55:17
>
>and I have code such as:
>
>>from time import *
>>startPoint = strptime(step.sTime, "%H:%S:%M")
>>finishPoint = strptime(step.fTime, "%H:%S:%M")

Your conversion strings cannot be correct.  Sure, there are international
differences in rendering dates and times, but not even in Eastern
WhereTheHeckIsStan do they encode hours, then seconds, then minutes.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From mal at egenix.com  Fri Sep 28 14:52:14 2007
From: mal at egenix.com (M.-A. Lemburg)
Date: Fri, 28 Sep 2007 20:52:14 +0200
Subject: OCBC connection
In-Reply-To: <fdjfs9$il$1@sea.gmane.org>
References: <mailman.1228.1190992159.2658.python-list@python.org>	<1191000128.112881.111790@r29g2000hsg.googlegroups.com>
	<fdjfs9$il$1@sea.gmane.org>
Message-ID: <46FD4D5E.9040704@egenix.com>

On 2007-09-28 20:07, Steve Holden wrote:
> kyosohma at gmail.com wrote:
>> On Sep 28, 9:57 am, "Sugrue, Sean" <Sean.Sug... at analog.com> wrote:
>>> I'm trying to make an odbc connection to postgresql which is on a server
>>> using python.
>>> Does anyone have a code snippet to make a basic connection with a select
>>> query?
>>>
>>> Sean
>> Sean,
>>
>> This appears to be what you're looking for:
>>
>> http://www.devx.com/opensource/Article/29071
>>
>> See also Python Database spec and module page:
>>
>> http://www.python.org/topics/database/
>>
> Mike:
> 
> This doesn't address the ODBC part of the inquiry. I was actually going 
> to respond saying I wasn't aware of an ODBC driver for PostgreSQL 
> (though I'd be surprised if there wasn't one).

There is one:

http://www.postgresql.org/ftp/odbc/versions/

and it works quite well with mxODBC on all supported platforms.

Here's a step-by-step guide for the Windows installation:

http://www.sparxsystems.com/EAUserGuide/setupapostgresqlodbcdriver.htm

Note that you should add these settings to your odbc.ini
section for the PostgreSQL data source in order to avoid
problems with BLOBs:

# Fetch BYTEA and TEXT as LongVarXXX column types:
ByteaAsLongVarBinary = 1
TextAsLongVarchar = 1

Alternatively, you can try the OpenLink driver:

http://uda.openlinksw.com/odbc/st/odbc-postgres-st/

If you're on Max OS, you should have a look at the ActualTech
drivers:

http://www.actualtechnologies.com/product_opensourcedatabases.php

Regards,
-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, Sep 28 2007)
>>> Python/Zope Consulting and Support ...        http://www.egenix.com/
>>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
>>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

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


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


From __peter__ at web.de  Mon Sep 24 11:29:27 2007
From: __peter__ at web.de (Peter Otten)
Date: Mon, 24 Sep 2007 17:29:27 +0200
Subject: strange behavious of the logging module?
References: <fd6n9i$8hc$1@news1.zdv.uni-mainz.de>
	<fd7nf6$g14$02$1@news.t-online.com>
	<1190643051.084144.230220@o80g2000hse.googlegroups.com>
Message-ID: <fd8l4n$9o1$03$1@news.t-online.com>

Vinay Sajip wrote:

> On Sep 24, 8:03 am, Peter Otten <__pete... at web.de> wrote:
>>
>> It would still be a good idea to file a bug report.
> 
> Not sure where the bug is. The script below, when called, prints
> "Information" to the console and "INFO     some_func Information" to
> mc_rigid.log, as I would expect. (Python 2.5.1)

I get

$ python vinaj.py 
Information
$ cat mc_rigid.log 
INFO     info     Information

Maybe a platform issue (I'm on Ubuntu 7.04)?

It seems Logger.findCaller() gets puzzled by the following discrepancy:

>>> logging.info.func_code.co_filename
'logging/__init__.py'
>>> logging._srcfile
'/usr/lib/python2.5/logging/__init__.py'

I don't think I have messed with paths manually on that machine, by the
way.

Peter


From rt at nospam.com  Fri Sep 21 17:17:48 2007
From: rt at nospam.com (Richard Townsend)
Date: Fri, 21 Sep 2007 22:17:48 +0100
Subject: Resolving windows shortcut to url
References: <lh68f3dskbiosrr98qideunruumqme1kel@4ax.com>
	<46f422d8$0$3030$e4fe514c@dreader31.news.xs4all.nl>
	<46f428ce$0$3030$e4fe514c@dreader31.news.xs4all.nl>
Message-ID: <8ec8f3db0bpda3k6s8sh6f0m0o3aock1jt@4ax.com>

On Fri, 21 Sep 2007 22:29:37 +0200, Ivo <ivonet at gmail.com> wrote:

>Ivo wrote:
>> Richard Townsend wrote:
>>> If I have a windows shortcut to a URL, is there a way to get the URL
>>> in a Python app?
>>>
>>> I found some code that uses pythoncom to resolve shortcuts to local
>>> files, but I haven't found any examples for URLs.
>>>
>>> The PyWin32 help mentions the PyIUniformResourceLocator Object, but I
>>> couldn't find an example of how to use it.
>>>
>> do you mean a *.lnk file or a *.url file?
>
>for a link (*.lnk) file:
>
>
>from win32com.shell import shell
>import pythoncom
>import os, sys
>
>class PyShortcut(object):
>     def __init__(self):
>         self._base = pythoncom.CoCreateInstance(shell.CLSID_ShellLink,
>                                                 None,
> 
>pythoncom.CLSCTX_INPROC_SERVER,
>                                                 shell.IID_IShellLink)
>
>     def load(self, filename):
> 
>self._base.QueryInterface(pythoncom.IID_IPersistFile).Load(filename)
>
>     def save(self, filename):
> 
>self._base.QueryInterface(pythoncom.IID_IPersistFile).Save(filename, 0)
>
>     def __getattr__(self, name):
>         if name != "_base":
>             return getattr(self._base, name)
>
>
>if __name__=="__main__":
>     lnk = PyShortcut()
>     lnk.load("path to your shortcut file including the .lnk extention 
>even if you don't see it in windows")
>     print "Location:", lnk.GetPath(shell.SLGP_RAWPATH)[0]

Hi Ivo,

I belive it is *.lnk files I'm interested in.

For example:

C:\Documents and Settings\All Users\Start
Menu\Programs\Development\Winpdb\winpdb-homepage.lnk

points to http://www.digitalpeers.com/pythondebugger/

However, your code is returning an empty string for location.

lnk.GetPath(shell.SLGP_RAWPATH) returns the tuple:

 ('', (0, <PyTime:01/01/1601 00:00:00>, <PyTime:01/01/1601 00:00:00>,
<PyTime:01/01/1601 00:00:00>, 0L, 0L, 0L, 0L, '', ''))

Regards,
Richard Townsend


From arkanes at gmail.com  Mon Sep 17 14:32:36 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Mon, 17 Sep 2007 13:32:36 -0500
Subject: Try this
In-Reply-To: <46EEC55A.9070602@holdenweb.com>
References: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>
	<1189981681.745195.18130@y42g2000hsy.googlegroups.com>
	<1189983233.709832.124290@19g2000hsx.googlegroups.com>
	<1189984913.956999.163100@n39g2000hsh.googlegroups.com>
	<1189990689.259451.232570@g4g2000hsf.googlegroups.com>
	<mailman.634.1189996018.2658.python-list@python.org>
	<1190008502.986300.286280@22g2000hsm.googlegroups.com>
	<mailman.646.1190027387.2658.python-list@python.org>
	<1190051875.433350.150820@50g2000hsm.googlegroups.com>
	<46EEC55A.9070602@holdenweb.com>
Message-ID: <4866bea60709171132o3a4210d2x21c76859b4056114@mail.gmail.com>

On 9/17/07, Steve Holden <steve at holdenweb.com> wrote:
> "Cretin" (in the sense of possessing sub-normal intelligence, as I do
> not know whether or not you have a thyroid deficiency) because you do
> not seem to be able to think of the needs of the larger community, and
> respond to argument with non-sequitur and evasion.
>
> Plus, you annoyed me. I should have restrained myself. Sorry.

I'm just adding to the noise here to comment that this rant is causing
this thread to display a dozen or so ads for thyroid medication in
gmail, which I find rather amusing.


From rrr at ronadam.com  Fri Sep 21 03:32:00 2007
From: rrr at ronadam.com (Ron Adam)
Date: Fri, 21 Sep 2007 02:32:00 -0500
Subject: Python 3K or Python 2.9?
In-Reply-To: <1190053757.091035.221570@22g2000hsm.googlegroups.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>	<46e7974d$0$31726$426a74cc@news.free.fr>	<fc8fc9$4qa$1@news2.carnet.hr>
	<5kq1hgF4r90oU1@mid.individual.net>	<1189618530.872819.136450@57g2000hsv.googlegroups.com>	<uir6ctto7.fsf@yahoo.com>	<1190013827.107324.111820@w3g2000hsg.googlegroups.com>	<mailman.645.1190026962.2658.python-list@python.org>
	<1190053757.091035.221570@22g2000hsm.googlegroups.com>
Message-ID: <46F37370.9040809@ronadam.com>



TheFlyingDutchman wrote:

> I am not talking about the way it does it, but rather, the way it
> could do it or... could have done it. That requires no knowledge of
> how the interpreter currently does it unless I am proposing something
> that no interpreter in the world could ever do.

Yes, there are a couple of things that could have been changed. But from 
what I can tell there are a number of reasons why things where chosen to be 
the way they are.

Two of those reasons is to make the core C code smaller and easier to 
maintain and also to make it easier to understand how things work. 
Exposing the inner workings as visible python code vs hidden C code helps 
both of those.

Another benefit of exposing more of the class machinery of Pythons objects 
as python code, is it makes it possible to modify more of how things work 
directly with python code.  A good way to see how this works is studying 
how descriptors and properties work.

     http://users.rcn.com/python/download/Descriptor.htm

You will find there is much more of python written in python than it may 
first seem.  In some cases the built in classes and modules are written in 
C, yet they still work as if they are written in Python.

So if you can find a way to do things like removing self in python in such 
a way that it doesn't require adding more to the Core interpreter, then it 
might be considered.

What I've found is as my skills improve, I take more advantage of being 
able to modify and/or introspect how things work.  This allows more choices 
on how I might solve a particular problem.

I also think there a lots of improvements that could be made to other parts 
of python such as the libraries that would be of much more practical benefit.

Regards,
    Ron



From stodge at gmail.com  Sun Sep 16 15:05:38 2007
From: stodge at gmail.com (Stodge)
Date: Sun, 16 Sep 2007 19:05:38 -0000
Subject: Saving parameters between Python applications?
Message-ID: <1189969538.830532.98840@g4g2000hsf.googlegroups.com>

I'm trying to do the following. I have a Python application that is
run:

python app1.py --location=c:\test1

What I want to do is save the location parameter, so I can then do (in
the same window):

python app2.py

And have app2.py automatically have access to the value of "location".

Now, the difficult part is, that in another window I want to do:

python app1.py --location=c:\test2
python app2.py

And have app2.py automatically get c:\test2 as the location. So the
two windows (consoles) are isolated from each other.

I thought I could use os.environ, but that doesn't save the variable
for applications that are run afterwards in the same window.

Any suggestions?

Thanks



From michele.simionato at gmail.com  Mon Sep  3 03:33:41 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Mon, 03 Sep 2007 07:33:41 -0000
Subject: How does super() work?
In-Reply-To: <mailman.308.1188803838.28954.python-list@python.org>
References: <eb79828c0708311358v388dc622qf781fe6651a7129e@mail.gmail.com>
	<mailman.308.1188803838.28954.python-list@python.org>
Message-ID: <1188804821.692585.138560@r29g2000hsg.googlegroups.com>

> En Fri, 31 Aug 2007 17:58:24 -0300, Lamonte Harris <pyth0nc0... at gmail.com>
> escribi?:
>
> > I've searched Google, and other search engines to try to find out how
> > super() works.  Can someone explain in short detail how super() works?  I
> > may and may not need to know this information, but it is good to know.

You may also look at my ACCU lectures on advanced Python:
http://www.phyast.pitt.edu/~micheles/oxford-lectures.zip



From dimitri.pater at gmail.com  Wed Sep  5 15:14:08 2007
From: dimitri.pater at gmail.com (dimitri pater)
Date: Wed, 5 Sep 2007 21:14:08 +0200
Subject: StringIO MySQL data blob Image problem
In-Reply-To: <e75321bd0709051213h686122d0w63318b1f16d2b509@mail.gmail.com>
References: <e75321bd0709050553h5e3302f7lf59f10104895ff5d@mail.gmail.com>
	<46DEAAAB.8040008@timgolden.me.uk>
	<e75321bd0709051213h686122d0w63318b1f16d2b509@mail.gmail.com>
Message-ID: <e75321bd0709051214t23ab465do47bb75d2f9dae024@mail.gmail.com>

---------- Forwarded message ----------
From: dimitri pater <dimitri.pater at gmail.com>
Date: Sep 5, 2007 9:13 PM
Subject: Re: StringIO MySQL data blob Image problem
To: Tim Golden <mail at timgolden.me.uk>


> Well, I'm mystified. Not by your results: that exactly what I
> expected to get, but because you're doing everything *except*
> manipulating an image and putting it into a PDF via ReportLab.
>
Dear Tim,
you are right of course, I have been trying to put the StringIO in a temp file:
cfoto=StringIO
cfoto.write(result[0][1].tostring())
dfoto=cfoto.getvalue()
fileFoto=open('temp.jpg','wb')
fileFoto.write(dfoto)

and indeed, the blob from MySQL is saved as an image!
however,
foto= Image('temp.jpg')
and inserting foto into a table results in:
x = struct.unpack('B', image.read(1))
error: unpack str size does not match format
oh, well... still needs some work
BTW: I used 'local' images before (I mean they did not originate from
a DB), that worked well in Reportlab's tables.
Thanks, I am getting there (I think)


-- 
---
You can't have everything. Where would you put it? -- Steven Wright
---
please visit www.serpia.org


From lorestar at gmail.com  Mon Sep 17 19:50:45 2007
From: lorestar at gmail.com (Lorenzo Stella)
Date: Mon, 17 Sep 2007 16:50:45 -0700
Subject: can Python be useful as functional?
Message-ID: <1190073045.618869.261290@k79g2000hse.googlegroups.com>

Hi all,
I haven't experienced functional programming very much, but now I'm
trying to learn Haskell and I've learned that: 1) in functional
programming LISTS are fundmental; 2) any "cycle" in FP become
recursion.
I also know that Python got some useful tool such as map, filter,
reduce... so I told: "let's try some FP-style programming with
Python!". I took a little example of Haskell:

     listprimes :: Integer -> [Integer]
     listprimes n = if n == 0 then sieve [2..] else sieve [2..(n-1)]
where
            sieve [] = []
            sieve (p:xs) = p : sieve (filter (\x -> mod x p > 0) xs)

and I tried to "translate" it in Python:

     def sieve(s):
         if s == []:
             return []
         else:
             return [s[0]] + sieve(filter((lambda x: x % s[0] > 0),
s[1:]))

     def listprimes(n):
         return sieve(range(2,n))

These should be almost the same: listprimes actually lists prime
integers up to n-1. The result is: Haskell implementation works well,
maybe it's not the better way to do it, but it does what I wanted.
Python implementation gives me

     RuntimeError: maximum recursion depth exceeded in cmp

My question is: how can we call a language "functional" if it's major
implementation has a limited stack? Or is my code wrong?

LS



From zzbbaadd at aol.com  Wed Sep  5 02:09:20 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Tue, 04 Sep 2007 23:09:20 -0700
Subject: list index()
In-Reply-To: <871wdd92vk.fsf@benfinney.id.au>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<87hcmhebwv.fsf@benfinney.id.au> <5jn9qgFdmbcU3@mid.uni-berlin.de>
	<1188886461.236237.168230@y42g2000hsy.googlegroups.com>
	<fbl6pe$2vd$1@lust.ihug.co.nz> <871wdd92vk.fsf@benfinney.id.au>
Message-ID: <1188972560.323189.33880@d55g2000hsg.googlegroups.com>


>
> I explain it by noting that list.index and dict.get serve totally
> different purposes. The former returns the index given a value; the
> latter returns a value given a key.

And the former raises an exception if the value is not found, while
the latter returns None if the value is not found.

>
> There are many areas of poor symmetry in the language and libraries;
> it isn't particularly clever or difficult to find them if one
> looks. Doing so doesn't appear to illustrate any point I see relevant
> in this thread.

It has been stated in this thread, that in Python, exceptions are used
differently than in other languages. Rather than just use them for
catastrophic errors that can't be dealt with, Python raises exceptions
on routine and survivable situations such as an item not found in a
list. It was mentioned that an exception is more Pythonic than
returning a "not found" value.

Someone pointed out that find() in str was a contradiction to this
since it doesn't throw an exception but returns a "not found" value,
and the response was that it was believed that find() would be removed
from the language (if so, it does not currently show up on the
"removed list" as has_key() and a few others do -
http://docs.python.org/dev/3.0/whatsnew/3.0.html) and was only there
for "historical reasons".

I don't believe the poster was trying to illustrate a point already
mentioned in the thread, but to give a contradiction to statements in
the thread. He was asking the question - why doesn't dict.get() throw
an exception on not found if that is the Pythonic way?




From blackmh at gmail.com  Wed Sep  5 04:07:44 2007
From: blackmh at gmail.com (Kveldulv)
Date: Wed, 05 Sep 2007 08:07:44 -0000
Subject: Catching gtk.STOCK_SIGNALS
Message-ID: <1188979664.773081.156720@57g2000hsv.googlegroups.com>

Hi all,

I made simple GUI with Glade, window and toolbar with one button that
calls
dialog with stock yes or no buttons. It's loaded with:
def callDialog(self, widget):
		self.wTree = gtk.glade.XML(self.gladefile, "yesorno")
		self.dlg = self.wTree.get_widget("yesorno")
and it works.
Now,  I want to call other dialog named dlg1 if gtk.RESPONSE_YES,
how do I do that? I went through pygtk tutoral and tried various ways
but can't figure it out... I'm probably missing something trivial
here.

tia



From ldo at geek-central.gen.new_zealand  Sat Sep  8 22:41:04 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sun, 09 Sep 2007 14:41:04 +1200
Subject: Does shuffle() produce uniform result ?
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
	<mailman.243.1187955760.32294.python-list@python.org>
	<tooru_honda-7C82D1.10432725082007@wvnews01.netvigator.com>
	<tooru_honda-58C552.20355225082007@wvnews01.netvigator.com>
	<tooru_honda-978B9E.11304526082007@wvnews01.netvigator.com>
	<slrnfdnojg.inr.apardon@rcpc42.vub.ac.be>
	<7xejhfbsjo.fsf@ruckus.brouhaha.com>
	<slrnfdpup6.inr.apardon@rcpc42.vub.ac.be>
	<7xabs39bin.fsf@ruckus.brouhaha.com>
	<13drijhfqlvlk96@corp.supernews.com>
Message-ID: <fbvmg0$1p3$3@lust.ihug.co.nz>

In message <13drijhfqlvlk96 at corp.supernews.com>, Steven D'Aprano wrote:

> Any cryptographer worth his salt (pun intended) would be looking to close
> that vulnerability BEFORE an attack is made public, and not just wait for
> the attack to trickle down from the NSA to the script kiddies.

Except that the NSA's reputation has taken a dent since they failed to
anticipate the attacks on MD5 and SHA-1.


From pavlovevidence at gmail.com  Fri Sep 21 23:44:00 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 21 Sep 2007 23:44:00 -0400
Subject: Getting rid of bitwise operators in Python 3?
Message-ID: <46f49740$0$32514$4c368faf@roadrunner.com>

Anyone with me here?  (I know the deadline for P3 PEPs has passed; this 
is just talk.)

Not many people are bit-fiddling these days.  One of the main uses of bit 
fields is flags, but that's not often done in Python because of keyword 
arguments and dicts, which are lot more versatile.  Another major use, 
talking to hardware, is not something oft done in Python either.

It seems like this occasional usage wouldn't justify having built-in 
operators on its own.  And with the int/long unification, it makes a bit 
less sense to think of integers as a bit field.  Python has these 
operators because of its heritage, but Python continues to move away from 
the bad habits of its ancestors (integer division and so on), and I 
wonder if this isn't another one.

Of course I'm not suggesting to get rid of bitwise operations altogether; 
just make them builtin functions: "x & 1" becomes "bitwise_and(x,1)" and 
so on.

Is it worth it to make such a change?  It would remove a lot of operators 
(11 by my count), vastly simplifying syntax,  Which, IMHO, is no small 
thing.  New numerical types would have fewer operations to support.  And 
let's face it: unlike arithmetic opertaions, there's not a lot of 
different meanings for bit operations. And it would also, um, make new 
special characters available *cough*.

Obviously, how widespread their usage is would matter.  But keep in mind 
it would also be easy to convert the code automatically, because the 
Python parser could reliably find all bitwise operations reliably.  (The 
problem would be types that overloaded them to be something other than 
bitwise operations: I'm looking at you, set.  That could very well be a 
deal breaker.  I've never approved of things with completely different 
meanings being deliberately overloaded to have the same spelling; this is 
one reason why.)

If anyone says, "But that takes away an easy test for oddness (x&1)!", 
or, "But you can multiply powers of two using left shift!  Isn't that 
cool?", I'm not buying it.  Those are gimmicks.  Arithmetic operations 
should be done with arithmetic operators.  The bitwise operators make the 
code much less readable, especially to people unfamiliar with this usage.


the-above-pun-was-intended-ly yr's,

Carl Banks


From mensanator at aol.com  Sun Sep 16 18:53:53 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: Sun, 16 Sep 2007 15:53:53 -0700
Subject: Try this
In-Reply-To: <1189981681.745195.18130@y42g2000hsy.googlegroups.com>
References: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>
	<13eqsdfsfvsa16f@corp.supernews.com>
	<1189969529.652871.19280@50g2000hsm.googlegroups.com>
	<mailman.621.1189970593.2658.python-list@python.org>
	<1189979679.969074.216490@y42g2000hsy.googlegroups.com>
	<1189981681.745195.18130@y42g2000hsy.googlegroups.com>
Message-ID: <1189983233.709832.124290@19g2000hsx.googlegroups.com>

On Sep 16, 5:28?pm, John Machin <sjmac... at lexicon.net> wrote:
> On Sep 17, 7:54 am, "mensana... at aol.com" <mensana... at aol.com> wrote:
>
>
>
>
>
> > On Sep 16, 2:22?pm, Steve Holden <st... at holdenweb.com> wrote:
>
> > > mensana... at aol.com wrote:
> > > > On Sep 16, 1:10?pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> > > >> On Sun, 16 Sep 2007 01:46:34 -0700, GeorgeRXZ <george... at gmail.com>
> > > >> declaimed the following in comp.lang.python:
>
> > > >>> Then Open the Notepad and type the following sentence, and save the
> > > >>> file and close the notepad. Now reopen the file and you will find out
> > > >>> that, Notepad is not able to save the following text line.
> > > >>> Well you are speed
> > > >>> This occurs not only with above sentence but any sentence that has
> > > >>> 4 3 3 5 (sequence of characters: Well=4 you=3 are=3 speed=5)
> > > >>         I tried. I also opened the saved file in SciTE...
> > > >> And the text WAS there...
>
> > > >>         It is Notepad that can not properly render what it,
> > > >> itself, saved.
>
> > > > C:\Documents and Settings\mensanator\My Documents>type huh.txt
> > > > Well you are speed
>
> > > > Yes, file was saved correctly.
> > > > But reopening it shows 9 unprintable characters.
> > > > If I copy those to a new file (huh1.txt):
>
> > > > C:\Documents and Settings\mensanator\My Documents>type huh1.txt
> > > > ?????????
>
> > > > But wait...the new file is 20 characters, not 9.
>
> > > > 09/16/2007  01:44 PM                18 huh.txt
> > > > 09/16/2007  01:54 PM                20 huh1.txt
>
> > > > C:\Documents and Settings\mensanator\My Documents>dump huh.txt
> > > > huh.txt:
> > > > 00000000  5765 6c6c 2079 6f75 2061 7265 2073 7065 Well you are spe
> > > > 00000010  6564                                    ed
>
> > > > Here's what it's actually doing:
>
> > > > C:\Documents and Settings\mensanator\My Documents>dump huh1.txt
> > > > huh1.txt:
> > > > 00000000  fffe 5765 6c6c 2079 6f75 2061 7265 2073 .~Well you are s
> > > > 00000010  7065 6564                               peed
>
> > > One word: Unicode.
>
> > > The "open" and "save" dialogs allow you to specify an encoding.
>
> > And the encoding specified was ANSI.
>
> > > If you
> > > specify Unicode the you will get what you see above.
>
> > And if you specify ANSI _before_ you click the file name,
> > the specification switches to Unicode and has to then
> > be manually switched back to ANSI.
>
> > > If you specify ANSI
> > > you will get the text you entered.
>
> > It's still a bug in the "open" dialog.
>
> It's more like a bug/feature in its encoding detector.

It is NOT a feature. If I save something as ANSI,
there is no excuse for it not to re-open in ANSI.

> I can get it to
> switch to Unicode only if there's an even number of characters AND the
> line is NOT terminated by CRLF -- add/remove one alpha character, or
> hit the enter key at the end of the line, and it won't detect it as
> Unicode when you open it again.
>
> You only get the BOM (0xfffe) if you are silly enough to save it while
> it's open in Unicode mode.

That was a test. I wasn't so stupid as to save
to the original file, but to make a copy.

>
>
>
> > > By the way, this has precisely what to do with Python?
>
> > I've been known to use Notepad to create Python
> > source code.
>
> Your source code would have to be trivially short to trigger the
> strange behaviour.

Makes you wonder what other edge cases aren't
handled properly.

Makes you wonder why Microsoft doesn't employ
professional programmers.



From surekap at gmail.com  Thu Sep 13 10:37:47 2007
From: surekap at gmail.com (Prateek)
Date: Thu, 13 Sep 2007 07:37:47 -0700
Subject: Possible suggestion for removing the GIL
In-Reply-To: <5ksb3mF5828oU1@mid.uni-berlin.de>
References: <1189657576.772108.136550@d55g2000hsg.googlegroups.com>
	<5ksb3mF5828oU1@mid.uni-berlin.de>
Message-ID: <1189694267.608577.288290@r34g2000hsd.googlegroups.com>

On Sep 13, 1:36 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Prateek wrote:
> > Hi,
>
> > Recently there was some talk on removing the GIL and even the BDFL has
> > written a blog post on it.
> > I was trying to come up with a scalable and backwards compatible
> > approach for how to do it.
>
> > I've put my thoughts up in a blog post - and I'd really like to hear
> > what the community thinks of it.
> > Mainly it revolves around dedicating one core for executing
> > synchronized code and doing context switches instead of acquiring/
> > releasing locks.
>
> Where is the gain? Having just one core doesn't give you true parallelism -
> which is the main reason behind the cries for a GIL-less Python.
>
> Diez

Diez,

I was talking of dedicating one core for synchronized code. In the
case of a threaded app on two cores, one core would be dedicated to
synchronized code and the other would run non-sync code (effectively
behaving like a single threaded machine). However, on machines with n
cores where n > 2 cores, we would have n-1 cores available to run code
in parallel.

Prateek



From gherzig at fmed.uba.ar  Thu Sep 20 17:01:38 2007
From: gherzig at fmed.uba.ar (Gerardo Herzig)
Date: Thu, 20 Sep 2007 18:01:38 -0300
Subject: Python Regex Question
In-Reply-To: <1190316811.760038.145850@50g2000hsm.googlegroups.com>
References: <1190316811.760038.145850@50g2000hsm.googlegroups.com>
Message-ID: <46F2DFB2.3040901@fmed.uba.ar>

joemystery123 at gmail.com wrote:

>I need to extract the number on each <td tags from a html file.
>
>i.e 49.950 from the following:
>
><td align=right width=80><font size=2 face="New Times
>Roman,Times,Serif">&nbsp;49.950&nbsp;</font></td>
>
>The actual number between: &nbsp;49.950&nbsp; can be any number of
>digits before decimal and after decimal.
>
><td align=right width=80><font size=2 face="New Times
>Roman,Times,Serif">&nbsp;######.####&nbsp;</font></td>
>
>How can I just extract the real/integer number using regex?
>
>  
>
If all the td's content has the &nbsp;[value_to_extract]&nbsp; pattern, 
things goes simplest

[untested]

/<td.*&nbsp;([^&]*)&nbsp;/

the parentesis will be used to group() the result (and extract what you 
really want)

Cheers
Gerardo


From kuantiko at escomposlinux.org  Sun Sep 16 05:03:49 2007
From: kuantiko at escomposlinux.org (=?ISO-8859-15?Q?Jes=FAs_Carrete_Monta=F1a?=)
Date: Sun, 16 Sep 2007 11:03:49 +0200
Subject: generating list of sub lists
References: <1189931217.415065.102820@w3g2000hsg.googlegroups.com>
Message-ID: <fcirhl$rh7$1@antonio.escomposlinux.org>

cesco wrote:

> l = ['string1', 'string2', 'string3']

l2=[l[:i+1] for i in range(len(l))]



From strombrg at gmail.com  Sun Sep 30 18:02:34 2007
From: strombrg at gmail.com (Dan Stromberg)
Date: Sun, 30 Sep 2007 22:02:34 GMT
Subject: notify when process finishes (on unix)
References: <1191161510.764656.244540@57g2000hsv.googlegroups.com>
	<mailman.1318.1191178487.2658.python-list@python.org>
Message-ID: <_1VLi.1737$hI7.787@newssvr17.news.prodigy.net>

On Sun, 30 Sep 2007 11:54:38 -0700, Michael Bentley wrote:

> On Sep 30, 2007, at 7:11 AM, bahoo wrote:
>> I'd like to write a script that sends me an email when a unix (Linux)
>> process ends running (or CPU drops below some threshold).  Could anyone
>> point me to the relevant functions, or show me an example?
> 
> man at.

http://stromberg.dnsalias.org/~strombrg/notify-when-up2.html



From gagsl-py2 at yahoo.com.ar  Tue Sep  4 15:13:17 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 04 Sep 2007 16:13:17 -0300
Subject: Undeterministic strxfrm?
References: <ixaDi.63$327.50@read3.inet.fi>
Message-ID: <op.tx480fgtx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 04 Sep 2007 07:34:54 -0300, Tuomas <tuomas.vesterinen at pp.inet.fi>  
escribi?:

> Python 2.4.3 (#3, Jun  4 2006, 09:19:30)
> [GCC 4.0.0 20050519 (Red Hat 4.0.0-8)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>  >>> import locale
>  >>> def key(s):
> ...     locale.setlocale(locale.LC_COLLATE, 'en_US.utf8')
> ...     return locale.strxfrm(s.encode('utf8'))
> ...
>  >>> first=key(u'maupassant guy')
>  >>> first==key(u'maupassant guy')
> False
>  >>> first
> '\x18\x0c \x1b\x0c\x1e\x1e\x0c\x19\x1f\x12
> $\x01\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x01\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x01\xf5\xb79'
>  >>> key(u'maupassant guy')
> '\x18\x0c \x1b\x0c\x1e\x1e\x0c\x19\x1f\x12
> $\x01\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x01\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x01\xb5'
>  >>>
>
> May be this is enough for a sort order but I need to be able to catch
> equals too. Any hints/explanations?

I can't use your same locale, but with my own locale settings, I get  
consistent results:

Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit  
(Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
py> import locale
py> locale.setlocale(locale.LC_COLLATE, 'Spanish_Argentina')
'Spanish_Argentina.1252'
py> def key(s):
...   return locale.strxfrm(s.encode('utf8'))
...
py> first=key(u'maupassant guy')
py> print repr(first)
'\x0eQ\x0e\x02\x0e\x9f\x0e~\x0e\x02\x0e\x91\x0e\x91\x0e\x02\x0ep\x0e\x99\x07\x02
\x0e%\x0e\x9f\x0e\xa7\x01\x01\x01\x01'
py> print repr(key(u'maupassant guy'))
'\x0eQ\x0e\x02\x0e\x9f\x0e~\x0e\x02\x0e\x91\x0e\x91\x0e\x02\x0ep\x0e\x99\x07\x02
\x0e%\x0e\x9f\x0e\xa7\x01\x01\x01\x01'
py> print first==key(u'maupassant guy')
True

Same thing with Python 2.4.4

-- 
Gabriel Genellina



From fakeaddress at nowhere.org  Sat Sep 15 07:56:32 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Sat, 15 Sep 2007 04:56:32 -0700
Subject: Modul (%) in python not like in C?
In-Reply-To: <mailman.367.1189507338.2658.python-list@python.org>
References: <mailman.294.1189364475.2658.python-list@python.org>	<TM0Fi.4172$FO2.18@newssvr14.news.prodigy.net>	<13ec37dri08s7a3@corp.supernews.com>	<EAoFi.6785$JD.2181@newssvr21.news.prodigy.net>
	<mailman.367.1189507338.2658.python-list@python.org>
Message-ID: <BLPGi.8123$z_5.7972@nlpi069.nbdc.sbc.com>

J. Cliff Dyer wrote:
> Bryan Olson wrote:
>> Scott David Daniels wrote:
>>   
>>> C, which was designed as a "high level assembly language," does not
>>> tightly define the results of / and % for negative numbers.  Instead
>>> it defines the result for positive over positive, and constrains the
>>> result for the others. 
>>>     
>> Not true. Here it is again:
>>
>>      When integers are divided, the result of the / operator is
>>      the algebraic quotient with any fractional part discarded.(87)
>>      If the quotient a/b is representable, the expression
>>      (a/b)*b + a%b shall equal a.
>>      [...]
>>      87) This is often called ??truncation toward zero??.
>>
>>      [International Standard ISO/IEC 9899:1999, Section 6.5.5
>>      Multiplicative operators, Paragraph 6 and footnote 87]
>>   
> But C was around for a long time before the 1999 standard.  C89,
> commonly called ANSI C, is still very commonly used in compilers, and
> K&R C goes back to 1972.  Is truncation toward 0 the standard for K&R C
> as well? 

Looks like you have a good point there. I do not have a copy of
the C89 standard, but do I have editions of Harbison&Steele that
reflect the 1989 standard, and they confirm your suspicion that
the results of the '/' and '%' operators on integer operants
were not uniquely defined in cases where an operand could be
negative.

Describing the '/' operator:

     For integral operands,, if the mathematical quotient is
     is not an exact integer, then the result will be one of
     the integers closest to the mathematical quotient of the
     operands. Of those two integers, the one closer to 0 must
     be chosen if both operands are positive

Furthermore:

     It is always true that (a/b)*b + a%b is equal to a if b
     is not 0

Quoted from: S. P. Harbison and G. L. Steele. /C: A
Reference Manual, Third Edition/, Prentice Hall, 1991;
Section 7.6.1, page 187.

So Arnau Sanchez and Scott David Daniels were correct with
respect to C89 and older standards, and many implementations
have not yet adopted the 1999 standard that strictly defines
the results of / and %.


-- 
--Bryan


From gherzig at fmed.uba.ar  Thu Sep  6 16:25:40 2007
From: gherzig at fmed.uba.ar (Gerardo Herzig)
Date: Thu, 06 Sep 2007 17:25:40 -0300
Subject: parsing long `To' and 'Cc' from email
Message-ID: <46E06244.80308@fmed.uba.ar>

Hi all. Im trying to develop yet another email filter. Just for fun for 
now. Im having a little trouble parsing long 'To' and 'Cc' headers. 
Sometimes p.e. the 'To' header comes like

'account1 at site.com, account at site2.com'
others comes like
'"My self" <my.account at self.net>, "My brother" <brother.account at self.net>',
other times a \r\t comes inside the `To' header. And any combination of 
the above mentioned (and shurely more) can ocur.

the email.* package dont seems to parse that kind of headers 
`correctly'. What i want is to get a list with all the email address in 
the `To' header.

Someone know if there is a more sofisticated parser for doing this?

Thanks!
Gerardo


From mbratcher at cclpcitrus.com  Fri Sep 28 11:56:18 2007
From: mbratcher at cclpcitrus.com (Mark Bratcher)
Date: Fri, 28 Sep 2007 11:56:18 -0400
Subject: Emailing the attachment created with the Quick Screenshots
	Script(Python + PIL)
Message-ID: <000001c801e8$1eb8ff20$eafca8c0@tfccorp.intra>

The quick screenshots script works great for the project I'm working on and
I'm trying to modify it to include emailing the JPG file it generates.  I
retrieved both scripts from the Python Archives.  The modified script is
pasted below and the errors below that.  My goal is to have the latest date
stamped file emailed to me.

 

If someone can see where I've gone wrong, it would be greatly appreciated.

 

"""

Simple script to capture your screen, save it named with today's date and
then

open it to allow editing and markup (circle problems, etc)

 

Created by Greg Pinero (gregpinero at gmail.com) Spring 2005

 

To run this you'll need:

>Python Imaging Library (PIL) -http://www.pythonware.com/products/pil/

>Python 2.3 or later - http://www.python.org

>Windows?

"""

import os

import sys

import time

import Image

import ImageGrab

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

#User Settings:

SaveDirectory=r'C:\Downloads\Python\Attachments'

ImageEditorPath=r'C:\WINDOWS\system32\mspaint.exe'

#Here is another example:

#ImageEditorPath=r'C:\Program Files\IrfanView\i_view32.exe'

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

 

img=ImageGrab.grab()

saveas=os.path.join(SaveDirectory,'ScreenShot_'+time.strftime('%Y_%m_%d%_%H_
%M_%S')+'.jpg')

img.save(saveas)

editorstring='"start"%s" "%s"'% (ImageEditorPath,saveas) #Just for Windows
right now?

#Notice the first leading " above? This is the bug in python that no one
will admit...

os.system(editorstring)

 

# Import smtplib for the actual sending function

import smtplib

 

# Here are the email package modules we'll need

from email.mime.image import MIMEImage

from email.mime.multipart import MIMEMultipart

 

COMMASPACE = ', '

 

# Create the container (outer) email message.

msg = MIMEMultipart()

msg['Subject'] = 'TEST'

# me == the sender's email address

# family = the list of all recipients' email addresses

msg['From'] = ("Mark Bratcher")

msg['To'] = COMMASPACE.join("Mark Bratcher")

msg.preamble = 'TEST'

 

# Assume we know that the image files are all in JPG format

for file in "c:\downloads\python\Attachments\*.jpg":

# Open the files in binary mode.  Let the MIMEImage class automatically

    # guess the specific image type.

    fp = open(file, 'rb')

    img = MIMEImage(fp.read())

    fp.close()

    msg.attach(img)

 

# Send the email via our own SMTP server.

s = smtplib.SMTP()

s.connect()

s.sendmail(me, family, msg.as_string())

s.close()

 

The errors I'm receiving in the Python Shell are:

 

>>> 

Traceback (most recent call last):

  File "C:\Downloads\Python\screenshooter.pyw", line 54, in <module>

    fp = open('C:\Downloads\Python\Attachments\*.jpg', 'rb')

IOError: [Errno 2] No such file or directory:
'C:\\Downloads\\Python\\Attachments\\*.jpg'

>>> 

Traceback (most recent call last):

  File "C:\Downloads\Python\screenshooter.pyw", line 54, in <module>

    fp = open('\Downloads\Python\Attachments\*.jpg', 'rb')

IOError: [Errno 2] No such file or directory:
'\\Downloads\\Python\\Attachments\\*.jpg'

>>> 

Traceback (most recent call last):

  File "C:\Downloads\Python\screenshooter.pyw", line 54, in <module>

    fp = open('*.jpg', 'rb')

IOError: [Errno 2] No such file or directory: '*.jpg'

>>> 

Traceback (most recent call last):

  File "C:\Downloads\Python\screenshooter.pyw", line 51, in <module>

    for file in jpgfiles:

NameError: name 'jpgfiles' is not defined

>>> 

Traceback (most recent call last):

  File "C:\Downloads\Python\screenshooter.pyw", line 54, in <module>

    fp = open(file, 'rb')

IOError: [Errno 2] No such file or directory: 'c'

>>> 

Traceback (most recent call last):

  File "C:\Downloads\Python\screenshooter.pyw", line 54, in <module>

    fp = open(file, 'rb')

IOError: [Errno 2] No such file or directory: 'c'

>>> 

Traceback (most recent call last):

  File "C:\Downloads\Python\screenshooter.pyw", line 54, in <module>

    fp = open(file, 'rb')

IOError: [Errno 2] No such file or directory: 'c'

 

 

Mark Bratcher

Consolidated Citrus, LP

4210-250 Metro, Parkway

Fort Myers, FL  33916

239-275-4060 ext 219

 

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From kskuhlman at gmail.com  Fri Sep  7 16:06:07 2007
From: kskuhlman at gmail.com (Ken Kuhlman)
Date: Fri, 07 Sep 2007 20:06:07 -0000
Subject: Best way to do attribute docstrings?
Message-ID: <1189195567.238990.54440@57g2000hsv.googlegroups.com>


What's the best method for annotating attributes with a docstring?
I'm looking to be able to introspect my class & get the comments back
out.

The technique I'm using is a little hoaky, but works.. basically I
create subclasses of the builtin types that I want to be able to use &
then instantiate them in my attribute assignments.   This gives me an
object that I can tweak the __doc__ attribute on.   An example of what
my code looks like is included below.

I saw that PEP 224 [1] was trying to meet this need, but got rejected
because the proposed syntax wasn't clear enough.

Thanks!
-Ken

[1] http://www.python.org/dev/peps/pep-0224/


attr_doc.py::

# Subclass str so we can modify instance's attributes (like __doc__)
class _(str): pass

# Boolean gave me extra fits that I don't understand, but this
technique works
class MyBool(int):
    def __str__(self):
        return `self.__int__() > 0`
    def __repr__(self):
        return self.__str__()

def bool_func(val):
    def blah():
       return MyBool(val)
    return blah
true = bool_func(True)
false = bool_func(False)


class Animal(object):
    four_legs = true()
    four_legs.__doc__ = "Animal has four legs"

    favorite_food = _('cheese')
    favorite_food.__doc__ = "Animal's favorite food"

    has_fur = true()
    has_fur.__doc__ = "Animal has fur"

print Animal.four_legs.__doc__, '::', Animal.four_legs
print Animal.favorite_food.__doc__, '::', Animal.favorite_food
print Animal.has_fur.__doc__, '::', Animal.has_fur

------
This gives the expected results:

Animal has four legs :: True
Animal's favorite food :: cheese
Animal has fur :: True



From aboudouvas at panafonet.gr  Mon Sep  3 06:19:52 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: Mon, 03 Sep 2007 03:19:52 -0700
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
In-Reply-To: <87tzqc9jda.fsf@benfinney.id.au>
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<1188803759.498517.198900@g4g2000hsf.googlegroups.com>
	<87tzqc9jda.fsf@benfinney.id.au>
Message-ID: <1188814792.025874.191320@d55g2000hsg.googlegroups.com>

I was wondering (and maybe i still do) about this GIL "problem". I am
relatively new to Python (less than a year) and when i started to
think about it i said: "Oh, this IS a problem". But when i dig a
little more, i found that "Ah, maybe it isn't".
I strongly believe that the best usage of multiple cores processor
will be achieved if programming languages are modified to support this
on their "hearts". Code blocks that would be identified by the
compiler and run in parallel and such things. Laboratories are working
on these stuff but i do not expect something in the very-near future.

So, as i mentioned above, there are solutions for that right now
("parallel python" and others) that enabled us with little effort to
spawn a new python interpreter, thus allowing the OS to schedule it on
a different core and do the job this way relatively cheap.
I wouldn't recommend going to IronPython despite the fact that the CLR
better utilize MP. The reason for this is that i would NEVER give up
the freedom that CPython gives me by exchange "better" usage of the MP
and platform lock-in.



From w.greg.phillips at gmail.com  Wed Sep 12 18:43:41 2007
From: w.greg.phillips at gmail.com (w.greg.phillips at gmail.com)
Date: Wed, 12 Sep 2007 15:43:41 -0700
Subject: Generating HTML
In-Reply-To: <mailman.449.1189617406.2658.python-list@python.org>
References: <9e2f512b0709112133l41ce5ef1g815962a81becf6b9@mail.gmail.com>
	<mailman.429.1189582623.2658.python-list@python.org>
	<46e79b40$0$28082$426a74cc@news.free.fr>
	<mailman.449.1189617406.2658.python-list@python.org>
Message-ID: <1189637021.632184.33790@g4g2000hsf.googlegroups.com>

On Sep 12, 1:16 pm, Evan Klitzke <e... at yelp.com> wrote:
> Can you compile Mako templates? This is one thing that I really like
> about Cheetah, and it wasn't clear to me from the Mako site if this is
> possible.

First line of the Mako home page:

"""Mako is a template library written in Python. It provides a
familiar, non-XML syntax which compiles into Python modules for
maximum performance."""

Greg




From carsten at uniqsys.com  Fri Sep  7 15:00:10 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 07 Sep 2007 15:00:10 -0400
Subject: Is a Borg rebellion possible? (a metaclass question)
In-Reply-To: <1189180478.257790.60160@g4g2000hsf.googlegroups.com>
References: <1189168282.665210.260840@19g2000hsx.googlegroups.com>
	<mailman.220.1189171663.2658.python-list@python.org>
	<1189180478.257790.60160@g4g2000hsf.googlegroups.com>
Message-ID: <1189191610.3367.93.camel@dot.uniqsys.com>

On Fri, 2007-09-07 at 15:54 +0000, Andr? wrote:
> Unfortunately, it fails.  Here's what I tried, followed by the
> traceback
> class SplinterBorg(object):
>     _shared_states = {}
>     def __new__(cls, *a, **k):
>         group = k.pop("group","BORG")
>         obj = object.__new__(cls, *a, **k)
>         obj.__dict__ = cls._shared_states.setdefault(group,{})
>         return obj
> 
> class MyClass(SplinterBorg):
>    def __init__(self, name):
>        self.name = name
>[...]
> Traceback (most recent call last):
>   File "test.py", line 15, in <module>
>     b1 = MyClass('b', group="B")
> TypeError: __init__() got an unexpected keyword argument 'group'

Indeed, if you have an __init__ method that shouldn't see the "group"
argument, you need a metaclass after all so you can yank the "group"
argument between __new__ and __init__. The following code seems to work,
but it's making my brain hurt:

class SplinterBorgMeta(type):
    def __call__(cls, *args, **kwargs):
        inst = cls.__new__(cls, *args, **kwargs)
        kwargs.pop("group",None)
        inst.__init__(*args,**kwargs)
        return inst

class SplinterBorg(object):
    __metaclass__ = SplinterBorgMeta
    _shared_states = {}
    def __new__(cls, *a, **k):
        group = k.pop("group","BORG")
        obj = object.__new__(cls, *a, **k)
        obj.__dict__ = cls._shared_states.setdefault(group,{})
        return obj

class MyClass(SplinterBorg):
    def __init__(self, name):
       self.name = name

The alternatives, as Steve just pointed out, would be not to subclass
SplinterBorg or to provide an __init__ method that expects a "group"
argument.

HTH,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From gagsl-py2 at yahoo.com.ar  Mon Sep  3 02:38:35 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 03 Sep 2007 03:38:35 -0300
Subject: advice about `correct' use of decorator
References: <46C4B097.4080309@fmed.uba.ar>
	<740c3aec0708170529s6f7e7fe2l8c92771c2d0a51d4@mail.gmail.com>
	<46C5C9AE.5020508@fmed.uba.ar>
	<mailman.112.1187787625.32294.python-list@python.org>
	<1187792001.935204.42330@e9g2000prf.googlegroups.com>
	<740c3aec0708230520h6a92a29ar180efed41730f563@mail.gmail.com>
	<op.txjpo7ixx6zn5v@gabriel2.softlabbsas.com.ar>
	<740c3aec0708290332k3c125d9el16250939e22ea8c4@mail.gmail.com>
Message-ID: <op.tx2felgfx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Wed, 29 Aug 2007 07:32:21 -0300, BJ?rn Lindqvist <bjourne at gmail.com>  
escribi?:

> On 8/24/07, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>> En Thu, 23 Aug 2007 09:20:21 -0300, BJ?rn Lindqvist <bjourne at gmail.com>
>> escribi?:
>>
>> > def check_user_logged_in(func):
>> >     def f(*args, **kwargs):
>> >         if global_state.the_user.is_logged_in:
>> >             return func(*args, **kwargs)
>> >         return show_login_page()
>> >     return f
>>
>> I think there is a semantic problem, perhaps we are not talking
>> about the same thing. I'm considering the software complexity AS
>> PERCEIVED BY THE PROGRAMMER, looking at the interactions between a
>> program and a programmer who is working on some task; some people
>> would say "cognitive complexity" to make it clear.
>
> There is no semantic problem. You are just mistaken in your belief
> that the complexity that the user of the decorator has to deal with is
> different from the complexity in implementing the decorator.

But they ARE different. That's the whole point of abstractions, code  
reuse, layered design... Designing a simple interfase on top of a complex  
system is very common. Nobody writes X-Window code, as nobody writes a raw  
event loop for Windows anymore: there are very good GUI toolkits, even  
portable frameworks, that put an abstract layer on top of that so the  
programmer has a much simple and coherent view. The complexity is behind  
the scenes.

>> Which API is more complex: one in which you can play a movie with
>> just a single call like PlayMovie(Title), or one on which you must
>> call a zillion functions to firtly initialize the stream format,
>> configure the display, disable undesired user interfase elements,
>> locate the movie file, load it in chunks, etc.? The first one is
>> certainly much simpler to use (simpler = less complex), and maybe
>> internally it calls the same functions as the second one, but nobody
>> cares.
>
> "nobody cares" is your guess. I'd bet that the caller of the PlayMovie
> function cares a lot: Is the movie played full screened? Which
> encodings are supported? Can you set the title of the movie window? Is
> streaming supported? Does it even work on windows? Which URI schemes
> does it support?  And so on and so on.
>
> That is why no video decoding API:s have a PlayMovie(Title) function
> and why I haven't seen a single 3d engine with a
> MakeReallyCoolDoomCloneFPSGame() function.

(yet!). What about urlopen? Using a single call one can be authenticated  
and retrieve any file in the other side of the planet. I consider it a  
simple interfase, altough it does complex things. Would you say it is  
better to use plain sockets everywhere? Or, since sockets are abstractions  
themselves, would you say it is better to use lower level primitives  
instead? Each time you descend a level, you have to use many simpler  
functions - but their combination is more complex.

> "hiding details" only works if the client programmer really doesn't
> care about the details.

Why should he care? Isn't "hiding implementation details" a good design  
principle?
When I use urlopen, I don't even care of the underlying socket  
implementation. I don't care which interfase the request is sent thru. I  
don't care if the answer got fragmented and some packets had to be  
reassembled. urlopen gives me something that looks like a file, and I just  
read() from it.

>> Back to your example, the fact that a decorator builds a higher order
>> function, does NOT make it more complex - because the programmer does  
>> not
>> see that. In fact, hiding the details makes it simpler.
>
> Yes, the programmer does see that. The example decorator I posted
> requires about a zillion preconditions to work correctly and will fail
> in weird ways when those preconditions are not satisfied. The
> programmer is interested in the crazy failures he or she will
> experience. I dare you to try and implementing the code both as a
> decorator and as a function, then write the unit tests and
> documentation. The complexity of those three items together
> (implementation + tests + documentation) will be much higher for the
> decorator choice because the complexity of the decorator
> implementation is a bit higher than using a plain old function.

Testing the decorator is as hard as testing any other function. Testing  
the decorated functions might involve *only* checking if the decorator is  
actually used for those functions.
Going to your posted example, I don't see the difference - I should say, I  
don't see the advantage. Using a decorator hides some implementation  
details and reduces coupling between modules, both good things on "my"  
book; your function with no decorator does quite the opposite, and doesn't  
look like good coding style (on "my" book, of course).

> Note also that it is extremely rare to see well-documented or
> well-tested code, which means that the programmer WILL have to analyze
> the implementation which means that implementation complexity matters
> a lot.

In any case, that would require testing and analyzing ONE function (the  
decorator) instead of inspecting a zillion repetitions of the same code  
that, when being wrong, have to be located and fixed on all those places.

Really, I still can't understand how you can defend such silly things -  
unless we are talking about different things.

-- 
Gabriel Genellina



From rschroev_nospam_ml at fastmail.fm  Mon Sep 17 04:10:40 2007
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Mon, 17 Sep 2007 08:10:40 GMT
Subject: Try this
In-Reply-To: <mailman.639.1190014678.2658.python-list@python.org>
References: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>
	<mailman.639.1190014678.2658.python-list@python.org>
Message-ID: <4EqHi.109510$aG7.5661996@phobos.telenet-ops.be>

BJ?rn Lindqvist schreef:
> On 9/16/07, GeorgeRXZ <georgerxz at gmail.com> wrote:
>> Well you are speed
> 
> That's an awesome party trick! But before I mail this to everyone at
> the office, must have a better sentence. Well you are speed is to
> gibberish. Something microsoft+evil... hm..

"This app can break" is the sentence used when I first heard about this 
bug. Perhaps not evil enough, but it does sound more sensible.

-- 
The saddest aspect of life right now is that science gathers knowledge
faster than society gathers wisdom.
   -- Isaac Asimov

Roel Schroeven


From devondejohn at comcast.net  Mon Sep  3 15:57:56 2007
From: devondejohn at comcast.net (devondejohn at comcast.net)
Date: Mon, 03 Sep 2007 12:57:56 -0700
Subject: Let's Unite Against Jews and Mongrels!
In-Reply-To: <46DAD433.1030503@comcast.net>
References: <1188198797.772672.60840@r29g2000hsg.googlegroups.com>
	<1188300284.507909.126770@57g2000hsv.googlegroups.com>
	<46D40BFE.2020301@comcast.net>
	<1188744204.822322.198360@57g2000hsv.googlegroups.com>
	<46DAD433.1030503@comcast.net>
Message-ID: <1188849476.067121.119110@r34g2000hsd.googlegroups.com>

On Sep 2, 9:18 am, "Richard B. Gilbert" <rgilber... at comcast.net>
wrote:
> Zentrader wrote:
> > On Aug 28, 4:50 am, "Richard B. Gilbert" <rgilber... at comcast.net>
> > wrote:
>
> >>>Unless, of course, someone has a working "Killbot".  If anyone has such
>
> >>a thing, please kill that "MI5victim" moron as well!
>
> > I reported MI5victim to s... at uce.gov and it appears to be gone, as
> > well as the "free air conditioner"'s posts.  (Thanks Steve Holden for
> > the reminder that it doesn't have to be personal e-mail spam in order
> > to be reported). If the OP posts again, report it.  Something like 75%
> > of internet mail is spam.
>
> MI5victim was alive and (I won't say well!!) a week ago.  It remains to
> be seen if he's gone.  And if you believe that reporting spam to
> s... at uce.gov actually has any effect on spam, you must believe in the
> Tooth Fairy as well!
>
> There will be spam as long as there are morons who will send the
> spammers money for whatever they're peddling!  I still get two or three
> "Spanish Prisoner" a/k/a "401" scams each week (this is the one where
> somebody has $30,000,000 US and will share it with you if only you will
> send him a little of your money)!  The US government does seem to have
> cracked down on the "Pharmacy" spam and the internet "pharmacies" that
> were behind it.
>
> Remember, it costs essentially nothing to send spam to 30,000,000 people
>   and if the spammer gets 0.5% response, he's ahead of the game!

HEY! NOBODY BASHES THE TOOTH FAIRY!



From jon+usenet at unequivocal.co.uk  Fri Sep 14 06:32:24 2007
From: jon+usenet at unequivocal.co.uk (Jon Ribbens)
Date: 14 Sep 2007 10:32:24 GMT
Subject: smtp debugging methods
References: <Pine.WNT.4.64.0709140015140.888@frna_yncgbc>
Message-ID: <slrnfekopo.haf.jon+usenet@snowy.squish.net>

On 2007-09-14, Sean Nakasone <seannakasone at yahoo.com> wrote:
> I'm having trouble with sending smtp mail.  It's hanging after the 
> smtplib.SMTP() line. It doesn't works from home but not from work.  What's 
> the best way to debug this?
>
> # Here's the error
>>>> server = smtplib.SMTP("smtp.gmail.com",465)

smtp.gmail.com port 465 is SSL only. Try port 587 instead.


From grante at visi.com  Sat Sep  1 00:24:22 2007
From: grante at visi.com (Grant Edwards)
Date: Sat, 01 Sep 2007 04:24:22 -0000
Subject: Looking for Delaunay triangulation module...
References: <13dge9m2339ka68@corp.supernews.com> <fbag9e$gnm$3@lust.ihug.co.nz>
Message-ID: <13dhqbm42tr1i7b@corp.supernews.com>

On 2007-09-01, Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> wrote:
> In message <13dge9m2339ka68 at corp.supernews.com>, Grant Edwards wrote:
>
>> So for lack of a delaunay module, I'm stuck trying to port my
>> application to Win32.
>
> Why not run it under Cygwin? :)

:)

I'm hoping there is an easier way than trying to build a
half-dozen large Python extensions (and their supporting
libraries) under Cygwin.

It looks like VTK might do the trick.  I can do the
triangulation, I just can't figure out how to get the data out
of the object containing the results.  VTK isn't very
Python-friendly at all.

-- 
Grant Edwards                   grante             Yow!  LOOK!!! I'm WALKING
                                  at               in my SLEEP again!!
                               visi.com            


From thomas.david.vaughan at gmail.com  Tue Sep 11 19:50:07 2007
From: thomas.david.vaughan at gmail.com (tvaughan)
Date: Tue, 11 Sep 2007 23:50:07 -0000
Subject: __getattr__ and static vs. instantiated
Message-ID: <1189554607.559487.224410@b32g2000prf.googlegroups.com>

Hi,

Let's say I have:

class Persistable(object):

        __attrs__ = {}

        def __getattr__(self, name):
                if name in self.__attrs__:
                        return self.__attrs__[name]['value']
                else:
                        return Object.__getattr__(self, name)

        def __setattr__(self, name, value):
                if name in self.__attrs__:
                        self.__attrs__[name]['value'] = value
                else:
                        Object.__setattr__(self, name, value)

And the I have:

class Person(Persistable):

        __storm_table__ = 'person'

        id = Int(primary=True)

        __attrs__ = {
                'name': {
                        'lang': 'en',
                        'value': Unicode(),
                },
        }

        def __init__(self):
                self.id = int(random.random() * 1000)

I can do this:

person = Person()
person.name = 'Jane Smith'

But I cannot do:

Person.name = 'Jane Smith'

or use Person.name in a Storm query like:

Person.name == 'Jane Smith'

__getattr__ is only called when using an instantiated class, and
never, it seems, in a static case. Why? How do I work around this?
Thanks.

-Tom

P.S. This is Python 2.5 on Ubuntu Feisty x86.



From ivonet at gmail.com  Fri Sep 21 16:04:12 2007
From: ivonet at gmail.com (Ivo)
Date: Fri, 21 Sep 2007 22:04:12 +0200
Subject: Resolving windows shortcut to url
In-Reply-To: <lh68f3dskbiosrr98qideunruumqme1kel@4ax.com>
References: <lh68f3dskbiosrr98qideunruumqme1kel@4ax.com>
Message-ID: <46f422d8$0$3030$e4fe514c@dreader31.news.xs4all.nl>

Richard Townsend wrote:
> If I have a windows shortcut to a URL, is there a way to get the URL
> in a Python app?
> 
> I found some code that uses pythoncom to resolve shortcuts to local
> files, but I haven't found any examples for URLs.
> 
> The PyWin32 help mentions the PyIUniformResourceLocator Object, but I
> couldn't find an example of how to use it.
> 
do you mean a *.lnk file or a *.url file?


From madzientist at gmail.com  Tue Sep 11 13:18:43 2007
From: madzientist at gmail.com (madzientist)
Date: Tue, 11 Sep 2007 10:18:43 -0700
Subject: Python code-writing for the blind. Was (Re: newbie: stani's python
	editor if-else)
In-Reply-To: <46e6aa30$0$22433$426a74cc@news.free.fr>
References: <1189484688.520933.25000@22g2000hsm.googlegroups.com>
	<mailman.381.1189514109.2658.python-list@python.org>
	<46e6aa30$0$22433$426a74cc@news.free.fr>
Message-ID: <1189531123.283413.160870@22g2000hsm.googlegroups.com>


Thanks, everybody, for the very very useful and kind responses.

There is a second reason why I asked the question about automatic de-
indenting. I am teaching myself Python partly so I can then help my
technically astute, but blind friend learn programming. For the many
reasons that Pythonistas like to cite often, I thought Python would be
a good choice to learn programming, and that perhaps the indentation
problem would be solved by the use of an intelligent editor.

But now I am not so sure, though I will try Emacs. Is there anyone
here with experience in such issues ? Maybe for her sake, I should
switch to learning Perl ;) ;)

More seriously, the added issue is that SPE uses spaces, not a single
tab to indent the lines, and I believe it is extremely tedious to use
screen-readers to keep track of blank spaces at the beginning of each
line. I have not tried it myself yet, but I will soon.

Is Python a bad choice for the blind programmer, as a result of a
tight linkage between visual aspects of the code and its function ? I
wish the site blindprogramming.com weren't so lifeless...

Thanks, Suresh



From uymqlp502 at sneakemail.com  Sun Sep  2 01:05:35 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Sat, 01 Sep 2007 22:05:35 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <K_bCi.721$7P7.506@newssvr19.news.prodigy.net>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<4866bea60708291013g56b3dea9m7abcf5e4e4f6e29c@mail.gmail.com>
	<mailman.120.1188423362.28954.python-list@python.org>
	<K_bCi.721$7P7.506@newssvr19.news.prodigy.net>
Message-ID: <1188709535.459572.22130@r34g2000hsd.googlegroups.com>

On Sep 1, 4:25 am, Bryan Olson

> Design-by-contract (or programming-by-contract) shines in large
> and complex projects, though it is not a radical new idea in
> software engineering. We pretty much generally agree that we want
> strong interfaces to encapsulate implementation complexity.
> That's what design-by-contract is really about.
>
> There is no strong case for adding new features to Python
> specifically for design-by-contract. The language is flexible
> enough to support optionally-executed pre-condition and
> post-condition checks, without any extension. The good and bad
> features of Python for realizing reliable abstraction are set
> and unlikely to change. Python's consistency and flexibility
> are laudable, while duck-typing is a convenience that will
> always make it less reliable than more type-strict languages.


Excellent points. As for "no strong case for adding new features to
Python specifically for design-by-contract," if you mean adding
something to language itself, I agree, but I see nothing wrong with
adding it to the standard libraries, if that is possible without
changing the language itself. Someone please correct me if I am wrong,
but I think PEP adds only to the libraries.



From ldo at geek-central.gen.new_zealand  Sat Sep 22 03:03:24 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 22 Sep 2007 19:03:24 +1200
Subject: Writing Object Data to Disk
References: <mailman.914.1190444082.2658.python-list@python.org>
Message-ID: <fd2ens$m9g$2@lust.ihug.co.nz>

In message <mailman.914.1190444082.2658.python-list at python.org>, Amit Kumar
Saha wrote:

> I would like to know if "Pickling" the class object is the only way of
> writing it to disk for persistent storage.

Wouldn't it be better to use a language-independent data representation that
wasn't tied to Python? Also tying your external data representation to your
internal program structure (objects) makes it harder to change the program
in future.


From Caseyweb at gmail.com  Thu Sep 27 17:55:34 2007
From: Caseyweb at gmail.com (Casey)
Date: Thu, 27 Sep 2007 21:55:34 -0000
Subject: getopt with negative numbers?
In-Reply-To: <mailman.1182.1190917341.2658.python-list@python.org>
References: <1190913250.198794.269530@k79g2000hse.googlegroups.com>
	<fdgpic$ssu$00$1@news.t-online.com>
	<1190915197.390247.313590@57g2000hsv.googlegroups.com>
	<fdgri5$ssu$00$2@news.t-online.com>
	<mailman.1182.1190917341.2658.python-list@python.org>
Message-ID: <1190930134.780005.68510@22g2000hsm.googlegroups.com>

On Sep 27, 2:21 pm, "J. Clifford Dyer" <j... at sdf.lonestar.org> wrote:
> If you can access the argument list manually, you could scan it for a negative integer, and then insert a '--' argument before that,
> if needed, before passing it to getopt/optparse.  Then you wouldn't have to worry about it on the command line.
>
> Cheers,
> Cliff

Brilliant!

<code>
    # Look for the first negative number (if any)
    for i,arg in enumerate(sys.argv[1:]):
        # stop if
        if arg[0] != "-": break
        # if a valid number is found insert a "--" string before it
which
        # explicitly flags to getopt the end of options
        try:
            f = float(arg)
            sys.argv.insert(i+1,"--")
            break;
        except ValueError:
            pass
</code>



From bj_666 at gmx.net  Fri Sep 14 08:04:51 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 14 Sep 2007 12:04:51 GMT
Subject: recursion
References: <fcbfnj$lh4$1@ss408.t-com.hr>
	<slrnfeinvk.1cc.horpner@FIAD06.norwich.edu>
	<mailman.491.1189700115.2658.python-list@python.org>
	<slrnfeit3k.1lg.horpner@FIAD06.norwich.edu>
	<fcdrv9$7lr$1@ss408.t-com.hr>
Message-ID: <5kvbn3F5h7l3U1@mid.uni-berlin.de>

On Fri, 14 Sep 2007 13:40:17 +0200, Gigs_ wrote:

> sorry i think that i express wrong. having problem with english
> 
> 
> what i mean is how python knows to add all thing at the end of recursion

Because you have written code that tells Python to do so.  ;-)

>  >>> def f(l):
>      if l == []:
>          return []
>      else:
>          return f(l[1:]) + l[:1]
> 
> 
> f([1,2,3])
> 
> recursion1   f([2,3]) + [1]
> 
> recursion2   f([3]) + [2]  or [2, 1]?
> 
> recursion3   f([]) + [3] or   [3, 2, 1]

Both alternatives in recursion 2 and 3 are wrong.  You have to simply
replace the function invocation by its result which gives:

    f([1, 2, 3])
r1  f([2, 3]) + [1]
r2  f([3]) + [2] + [1]
r3  f([]) + [3] + [2] + [1]
r4  [] + [3] + [2] + [1]

And now the calls return:

r3  [3] + [2] + [1]
r2  [3, 2] + [1]
r1  [3, 2, 1]

> i dont get all this
> 
>  >>> def f(l):
>      if l == []:
> 	print l
>          return []
>      else:
>          return f(l[1:]) + l[:1]
> 
>  >>> f([1,2,3])
> []
> [3, 2, 1]  # how this come here? how python save variables from each
> recursion?

There is not just one `l` but one distinct `l` in each call.

Ciao,
	Marc 'BlackJack' Rintsch


From super.sgt.pepper at gmail.com  Fri Sep 21 18:07:55 2007
From: super.sgt.pepper at gmail.com (Cristian)
Date: Fri, 21 Sep 2007 22:07:55 -0000
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <1190411282.060772.289270@y42g2000hsy.googlegroups.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
Message-ID: <1190412475.772358.109810@n39g2000hsh.googlegroups.com>

On Sep 21, 2:48 pm, chris.monsa... at gmail.com wrote:
> There are already anonymous functions in Python.
>
> lambda x, y, z: x + y + z
>
> is the same as:
>
> def _(x, y, z): return x + y + z
>
> As for the method stuff, check out staticmethod(). If you assign
> staticmethod(<function here>) to an object, it will be treated as a
> normal function and not as a "method."
>
> I have my own personal opinions about how methods should be in Python,
> but, whatever. It's weird to deal with stuff like this:
>
> x.y = re.match # Assign a function to an attribute of a class, but it
> doesn't work because you can't assign anything but methods!
> x.y = staticmethod(re.match) # Ugly

True, there is lambda, but that is very limited. It might be useful
for key arguments, but not much else. It doesn't solve the teaching
problem of "See, functions are just like any other data type. You can
assign it to a variable." It would be a footnote if it's mentioned at
all. My hope is to subtly reinforce the notion that functions are data
and can be passed around. The current function declaration doesn't
help with this. Creating a function and assigning it to a name is
exactly what Python does, why not have it come out in the syntax? It's
not necessary, yes, but I think it would be helpful for teaching
purposes.

Again, it's not necessary as much as it's more intuitive and obvious
what's going on. This helps a beginner sort out the process from the
syntax without taking it on faith. They can see the class declaration
and see "I'm defining just another attribute to this class only this
time it happens to be method".

There is nothing functionally lacking in Python. I'm just curious if
there's anything Python can do syntax-wise to help a person better
grasp programming ideas and Python's inner workings.



From json.barnes at gmail.com  Tue Sep 25 23:25:46 2007
From: json.barnes at gmail.com (Jason M Barnes)
Date: Tue, 25 Sep 2007 23:25:46 -0400
Subject: An Editor that Skips to the End of a Def
In-Reply-To: <fdcfci$brq$1@lust.ihug.co.nz>
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk> <fd0au1$fro$1@lust.ihug.co.nz>
	<5lhs4pF8bkunU1@mid.individual.net> <fd4168$ige$1@lust.ihug.co.nz>
	<slrnfff9op.1is.horpner@FIAD06.norwich.edu>
	<fd9ncb$q3l$1@lust.ihug.co.nz>
	<slrnffhe9g.2db.hat@se-162.se.wtb.tue.nl>
	<fdcfci$brq$1@lust.ihug.co.nz>
Message-ID: <833263a00709252025n47b1ed28pacfc0371a6792d11@mail.gmail.com>

Warning: Religion follows:

On 9/25/07, Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> wrote:
> In message <slrnffhe9g.2db.hat at se-162.se.wtb.tue.nl>, A.T.Hofkamp wrote:
>
> > On 2007-09-25, Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand>
> > wrote:
> >
> >> Why does it "choose" to modify your position when you exit insert mode?
> >
> > Try to insert 1 character in the middle of a line. You'll end up at the
> > same position. Now press 'j' (one line down), then '.' (do it again).
> > I believe that's why.
> >
> > Great when you have nicely formatted columns of code underneath each
> > other.
>
> It's strange, but in nearly 30 years of writing code in dozens of different
> languages, I've never felt the urge to line up my code in columns. Never.
> (Apart from assembly language, which I suspect you don't want to hear
> about.)
>
> > The cost of that power is a command/insert mode and a steep learning
> > curve.
>
> That's another issue, that of ROI. Having learnt the vi/vim keystrokes, what
> does that enable you to do? Use vi/vim, and that's it. Whereas I've found
> other situations where subsets of Emacs keystrokes are recognized, such as
> anything that uses GNU readline (including the Python console--see, this IS
> relevant to Python after all), and pico/nano. These are all extra goodies
> that are to be found on the way up the Emacs learning curve.

Off the top of my head, I can think of a few vim commands that have
come in handy.  I can search through a webpage in Firefox by using the
same '/' search command that vim has.  The movement keys (h,j,k,l) are
the same as in any paging program I've ever used.  Not to mention that
I learned regexes by learning 's/regex/replacement' first :-)
>
> > For example, ever wondered why you on earth you need CTL-C and CTL-V to
> > copy/paste? Why not simply select with the mouse, then right-click to
> > paste?
>
> Or better still, why not allow both?
>
> >> And the downside is that the largest single proportion of those commands
> >> end up being variations on "enter insert mode". Because most of the
> >> keystrokes you enter during an editing session are in fact text to be
> >> input into the file, not commands to manipulate that text. So in a modal
> >> editor, having to
> >
> > Depends on what you are doing. When entering new code, yes. When
> > maintaining code, no (lots of small changes).
>
> Making lots of small changes is even worse--it means you're jumping into
> insert mode for shorter times, more frequently.

If you're making lots of small changes, then you shouldn't be jumping
into insert mode at all, IMO.
>
> And that's when you discover something else: that how you delete text in
> vi/vim differs, depending on whether it's something you just inserted while
> currently in insert mode, or whether it was there from before you last
> entered insert mode: in the former case, you use backspace to delete, in
> the latter case, you can't use backspace, you have to use "X". What does
> backspace do when not in insert mode? It just moves you through the text.
> What does the forward-delete key do? In both modes, it actually deletes
> text!

Actually, vim always deletes the same way regardless of when it was
inserted -- one of the many *improvements* over vi.

That's my religion anyway ;-), but I thought this was a python mailing list ;-)

Jason
>
> At least with Emacs, text is text--it doesn't matter when it was inserted,
> it still behaves the same way.
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From wizzardx at gmail.com  Sat Sep  8 15:26:14 2007
From: wizzardx at gmail.com (David)
Date: Sat, 8 Sep 2007 21:26:14 +0200
Subject: Using struct timeval in python
In-Reply-To: <1189273504.153216.60470@22g2000hsm.googlegroups.com>
References: <1189273504.153216.60470@22g2000hsm.googlegroups.com>
Message-ID: <18c1e6480709081226k4d1d10baxbec668462ada95a1@mail.gmail.com>

On 9/8/07, sapsi <saptarshi.guha at gmail.com> wrote:
> Hi,
> I am using a library (pcapy) that returns a timeval object T=
> (seconds,microseconds) where microseconds is always < 1e6.
> Is there a Python class that can handle timeval structs? Specifically,
> I wish to subtract two T (defined above) objects, taking into account
> the large values of T[0] and T[1] (esp T[0])?
>
> At one point, I would have to step in, since T[0] rolls back to zero
> (after some time).

The Pythonic way would be to convert directly to a datetime (or
perhaps timedelta) object as soon as you receive your (seconds,
microseconds) tuple. Then you can subtract etc easily and interoperate
nicely with the rest of the standard python library.

But if you want to keep it in tuple format then you will probably need
to roll your own. eg: subclass tuple and override the __sub__ method.
Just make sure you handle negative values correctly (ie, what
(seconds,microseconds) you should end up with when you subtract a
later timval from an earlier timeval).

Alternatively you could convert to and from datetime as you need to
(perhaps subclassing and adding methods for easier conversion), but
that would be more expensive.


From bdesth.quelquechose at free.quelquepart.fr  Sun Sep  9 10:53:58 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 09 Sep 2007 16:53:58 +0200
Subject: creating really big lists
In-Reply-To: <1189531096.198401.76590@50g2000hsm.googlegroups.com>
References: <1188985838.661821.41530@k79g2000hse.googlegroups.com>
	<46e5b1b4$0$30530$426a74cc@news.free.fr>
	<1189531096.198401.76590@50g2000hsm.googlegroups.com>
Message-ID: <46e6feb8$0$25583$426a34cc@news.free.fr>

Dr Mephesto a ?crit :
> On Sep 8, 8:06 pm, Bruno Desthuilliers
> <bdesth.quelquech... at free.quelquepart.fr> wrote:
> 
>>Dr Mephesto a ?crit :
>>
>>
>>>Hi!
>>
>>>I would like to create a pretty big list of lists; a list 3,000,000
>>>long, each entry containing 5 empty lists. My application will append
>>>data each of the 5 sublists, so they will be of varying lengths (so no
>>>arrays!).
>>
>>>Does anyone know the most efficient way to do this?
>>
>>Hem... Did you consider the fact that RAM is not an unlimited resource?
>>
>>Let's do some simple math (please someone correct me if I'm going off
>>the road): if a Python (empty) list object required 256 bits (if I refer
>>to some old post by GvR, it's probably more - 384 bytes at least. Some
>>Python guru around ?), you'd need (1 + (3000000 * 5)) * 256 bits just to
>>build this list of lists. Which would make something around 3 Gb. Not
>>counting all other needed memory...
>>
>>FWIW, run the following code:
>>
>># eatallramthenswap.py
>>d = {}
>>for i in xrange(3000000):
>>   d[i] = ([], [], [], [], [])
>>
>>And monitor what happens with top...
> 
> 
> Unused ram is wasted ram :)

Indeed. But when your app eats all RAM and swap and brings the system 
down, users are usually a bit unhappy !-)

> I tried using MySQL, and it was to slow.

Possibly.

> and I have 4gb anyway...

*You* have 4gb. Yes, fine. But:

1/ please take time to re-read my post - the 3 gb is based on a very 
optimistic estimation (256 bits) of the size of an empty list. If you 
choose the (probably much closer to reality) estimate of 384 bits, then 
you need (1 + (3000000 * 5)) * 384, which makes =~ 5 gb. More than what 
*you* have. BTW, please remember that your OS and the Python interpreter 
are going to eat some of these 4 gb, and that you intend to actually 
*store* something - objects references - in these lists. Even if you do 
have a few shared references, this means that you'll have to have RAM 
space for *at least* 3000000 * 5 *more* Python objects (which make *1* 
object per list...). Which will *at minima* use about the same amount of 
RAM as the list of lists itself. Which take us to something like 10 
gb... for *1* object per list. I of course suppose you plan to store 
much more than 1 object per list !-)

2/ now ask yourself how many users of your application will have enough 
RAM to run it...

So IMVHO, the question is not how to build such a list in less than x 
minutes, but how to *not* build such a list. IOW, do you *really* need 
to store all that stuff in RAM ?


From bignose+hates-spam at benfinney.id.au  Tue Sep  4 02:50:11 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 04 Sep 2007 16:50:11 +1000
Subject: parameter list notation
References: <1188882028.165803.316540@r34g2000hsd.googlegroups.com>
Message-ID: <87y7fm9b6k.fsf@benfinney.id.au>

TheFlyingDutchman <zzbbaadd at aol.com> writes:

> In looking at some of the functions I see this prototype:
>     def create(self,*fields,**kw):
> 
> I am not clear on what the * and the ** are for or what they
> represent.

It would seem, then, that you haven't followed the exercises in the
Python tutorial <URL:http://docs.python.org/tut/> very thoroughly.

Please work your way through the whole tutorial, with the document and
an interactive Python prompt side by side. Run each exercise, read the
accompanying text, experiment until you understand what it does; then
move onto the next, and so on.

This will give you a grounding in the fundamentals of the language
that will be of great assistance to you, and to us.

-- 
 \            "It's not what you pay a man, but what he costs you that |
  `\                                          counts."  -- Will Rogers |
_o__)                                                                  |
Ben Finney


From emin.shopper at gmail.com  Fri Sep 21 16:03:09 2007
From: emin.shopper at gmail.com (Emin.shopper Martinian.shopper)
Date: Fri, 21 Sep 2007 16:03:09 -0400
Subject: which python mode to use in emacs
Message-ID: <32e43bb70709211303s9e14825v4fa3c75b3a4b9540@mail.gmail.com>

Dear Experts,

There seem to be multiple versions of python modes for emacs? Could someone
point me to the mainterers of either the "official" one or the one that is
being maintained most vigorously?

I've tried both python.el and python-mode.el. Both seem to have various
minor foibles which I'd be happy to help fix and improve but the EmacsWiki
page about python mode seems to imply that one or both or no longer
maintained or acceprting patches.

Thanks,
-Emin
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From pavlovevidence at gmail.com  Sat Sep 22 15:27:20 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sat, 22 Sep 2007 15:27:20 -0400
Subject: Getting rid of bitwise operators in Python 3?
References: <46f49740$0$32514$4c368faf@roadrunner.com>
	<13f99fediasg3ae@corp.supernews.com>
	<46f4c171$0$26367$4c368faf@roadrunner.com>
	<13fa49vie86ii1d@corp.supernews.com>
Message-ID: <46f57841$0$15333$4c368faf@roadrunner.com>

On Sat, 22 Sep 2007 12:57:35 +0000, Grant Edwards wrote:
> On 2007-09-22, Carl Banks <pavlovevidence at gmail.com> wrote:
>> Of course it would be.  The reason I mention it is that automatic
>> convertibility is a key factor in whether a change can make it into
>> Python 3.
> 
> It matters not whether fugly code is automatically generated or manually
> generated.  It's still hard to read and maintain.

By my understanding, it really doesn't matter that much.

The transition tool's purpose is to allow a subset of 2.x code to run on 
3.x, so that developers don't have to maintain separate codebases to 
support both.  The 3.x code that is produced isn't intended to be read or 
maintained.  So no big deal if it's a little ugly.  (But there's still 
tracebacks to read and regressions to debug, so I guess it can't be too 
ugly.)


Carl Banks


From munncha at gmail.com  Sun Sep 23 15:10:03 2007
From: munncha at gmail.com (Kurtis Heimerl)
Date: Sun, 23 Sep 2007 12:10:03 -0700
Subject: Preemption in python
In-Reply-To: <1190572311.5703.4.camel@thinkpad>
References: <9a4753250709221928s5768b15emecfd71a0f476cce@mail.gmail.com>
	<1190572311.5703.4.camel@thinkpad>
Message-ID: <9a4753250709231210l701a2cccge014732c79a5fdf9@mail.gmail.com>

I ran a brief program to just test the threading properties of my VM, it
seems to be preempting that application.

Are there any interesting locks in the gtk package that I might not be
playing well with?

The reader thread that only runs on a blocking call is at the end of my
response.

I'll explain a bit more. This thread is spawned, I also have the main thread
running a gtk windowed gui. The gui has it's own threads to deal with button
presses and such. The problem is that the gui never seems to let anyone else
run. Only on button presses that cause blocking calls (
ossaudiodev.audio.read for instance) does the reader thread print anything.

Likewise, this thread blocks the GUI thread. There's really just no
preemption at all going on, and it's exceedingly strange.

The GIL locking could be part of my problem. I'm not explicitly releasing
any locks, I have not used the lock interface at all. That shouldn't cause
the behavior I'm seeing though right?

class ReaderThread( threading.Thread ):

    def __init__(self, dtn):
        self.dtn = dtn
        threading.Thread.__init__(self)

    def run(self):
        print("RUNNING")
        while(True):
            bundle = api.recv(self.dtn.handle, DTN_PAYLOAD_MEM, 10)
            if(bundle):
                print("RECEIVED BUNDLE")
            else:
                print("NO BUNDLE")

Thanks for the help, I really appreciate it. I'm totally blocked on this
without you folk's help.

On 9/23/07, Evan Klitzke <evan at yelp.com> wrote:
>
> On Sat, 2007-09-22 at 19:28 -0700, Kurtis Heimerl wrote:
> > Hi, I'm developing my first python application, a multi-threaded cell
> > phone gadget on ubuntu 7.10. I've just split off my first thread, and
> > I've noticed something extremely strange: There doesn't seem to be any
> > preemption. There are currently two threads, one that pings a storage
> > service to see if there are messages available, and the other that
> > runs the gtk windows. If I do not explicitly yield either one, it runs
> > forever. I'm assuming this is a setting somewhere, but that's a very
> > strange default behavior.
> >
> > How do I get this to go about preempting these threads? Any advice
> > would be helpful. Thanks!
>
> I'm far from an expert in threaded Python applications, but threading
> ought to work out of the box. By default the Python interpreter will
> switch threads every 100 bytecode instructions
> (http://docs.python.org/api/threads.html).
>
> Note that if you are synchronizing around a lock, you may need to sleep
> before trying to reacquire the the lock to completely exit the critical
> section. A good overview of this (and the Python threading model) can be
> found at http://linuxgazette.net/107/pai.html
>
> --
> Evan Klitzke <evan at yelp.com>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From bborcic at gmail.com  Wed Sep  5 08:17:08 2007
From: bborcic at gmail.com (Boris Borcic)
Date: Wed, 05 Sep 2007 14:17:08 +0200
Subject: So what exactly is a complex number?
In-Reply-To: <7xk5r7dm53.fsf@ruckus.brouhaha.com>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
	<mailman.4.1188866709.21370.python-list@python.org>
	<roy-3C221C.22043603092007@news.panix.com>
	<mailman.8.1188882659.2658.python-list@python.org>
	<7xk5r7dm53.fsf@ruckus.brouhaha.com>
Message-ID: <46de9e7d$1_7@news.bluewin.ch>

Paul Rubin wrote:
> Also, for
> example, the derivative of a complex valued function means something
> considerably stronger than the derivative of a real valued function.

I vaguely remember (it has been decades) an amazingly beautiful russian doll 
system of four of five theorems, the first hypothesizing a function of a complex 
variable with a property that IIRC appeared somewhat weaker than 
differentiability, and the latter theorems not hypothesizing anything more, but 
pushing the consequence further to ever stronger properties.


From deets at nospam.web.de  Sat Sep 15 03:32:17 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 15 Sep 2007 09:32:17 +0200
Subject: An ordered dictionary for the Python library?
In-Reply-To: <1189833002.694934.284960@57g2000hsv.googlegroups.com>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<7xzlzrtrjn.fsf@ruckus.brouhaha.com>
	<1189664832.876539.86800@k79g2000hse.googlegroups.com>
	<7xps0mmig9.fsf@ruckus.brouhaha.com>
	<1189733708.659317.83950@y42g2000hsy.googlegroups.com>
	<1189753968.917636.310120@19g2000hsx.googlegroups.com>
	<fcemqi$g76$1@daisy.noc.ucla.edu>
	<1189800045.642278.313860@o80g2000hse.googlegroups.com>
	<fceq87$ivr$1@daisy.noc.ucla.edu>
	<1189833002.694934.284960@57g2000hsv.googlegroups.com>
Message-ID: <5l1g4nF60aluU1@mid.uni-berlin.de>

Mark Summerfield schrieb:
> On 14 Sep, 21:23, James Stroud <jstr... at mbi.ucla.edu> wrote:
>> Mark Summerfield wrote:
>>> I guess I'll have to rename my module (although unfortunately, my book
>>> has just gone into production and I have a (simpler) example of what I
>>> considered to be an ordered dict, so I will be adding to the
>>> terminology confusion). That notwithstanding, given that it is a
>>> sorteddict, how is the API?
>> I must think the API good because I have been implementing, in parallel
>> with this discussion, my own "OrderedDict" with a very similar API (this
>> is part of a larger project where I recently found the need to have a
>> well-implemented ordered dict). The only real omission I see is to allow
>> instantiating a "sorted dict" with an optional cmp function--to allow
>> the generalization of such features as case-independence, etc.
> 
> I tend to create different orderings by munging the keys rather than
> by having optional cmp functions (as you'll see in the sorteddict.py
> docstring). I've now put sorteddict on PyPI (with docs & tests):
> http://pypi.python.org/pypi/sorteddict

The advantage of a passed cmp-function is that the context of usage 
hasn't to be aware of any change in semantics. Yet for better 
performance, the cmp-function might be a tad to slow, better use a 
key-function like for sorted/sort.

Additionally, I'd change the parameter names of the keys()-method to 
start/end and make more clear if end is inclusive or not. The 
first/secondindex-names are pretty horrible IMHO, because the 
essentially enumerate parameters. Who wants to work with a method

foo(arg1, arg2, arg3)

? :)

Diez


From mail at timgolden.me.uk  Wed Sep 12 10:56:51 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Wed, 12 Sep 2007 15:56:51 +0100
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <1189608231.151112.147550@y42g2000hsy.googlegroups.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>	<1189604018.520338.162520@57g2000hsv.googlegroups.com>	<46e7f450$0$12305$426a74cc@news.free.fr>
	<1189608231.151112.147550@y42g2000hsy.googlegroups.com>
Message-ID: <46E7FE33.60209@timgolden.me.uk>

Charles Fox wrote:
> Thanks guys -- yeah these two stategies (short s.varname; and explicit
> rescoping, a=self.a etc) are more or less what I was using.  That's
> still kind of annoying though.
> 
> The s.varname approach still makes numerical code much harder to read.
> 
> I had a nasty bug with the boilerplate approach when forgetting to
> reassign some of the variables back to members (self.a=a).  And that's
> a lot of boilerplate you need -- I thought the python way was to
> minimize redundant code?  (Ditching header files and curley brackets
> was a main reason for me coming here).
> 
> I see the argument for making self explicit -- what would be wrong
> with just .a instead of self.a though?  That's still explicit but much
> easier to read.  (I think I've seen that somewhere else, is it C#?)

Charles, while you are quite right to air your ideas, do bear in mind
that this issue has been thrashed out again and again on this group
and in other forums. I hope you have at least read the FAQ:

http://www.python.org/doc/faq/general/#why-must-self-be-used-explicitly-in-method-definitions-and-calls

and PEP 3099:

http://www.python.org/dev/peps/pep-3099/

If you take the trouble to search the archives of this list alone
for, say, explicit+self, you'll see that there are quite strong arguments
(and argumentors) on both sides. In that sort of situation the status quo
tends to hold sway. (And in this case, GvR has only recently responded to
similar comments by Bruce Eckels -- a couple of heavyweights -- in a way
which makes it unlikely that this is going to change).

I think it's one of those things which comes down, fairly enough, to: we
do things this way and it works for us; other languages do other things
and it works for them.

TJG


From BjornSteinarFjeldPettersen at gmail.com  Sat Sep 29 15:58:04 2007
From: BjornSteinarFjeldPettersen at gmail.com (thebjorn)
Date: Sat, 29 Sep 2007 12:58:04 -0700
Subject: Program inefficiency?
In-Reply-To: <1191094332.393736.231390@w3g2000hsg.googlegroups.com>
References: <NYOBGCEXSMTP22SiTqg00150043@NYOBGCEXSMTP22.uswin.ad.vzwcorp.com>
	<mailman.1282.1191082697.2658.python-list@python.org>
	<1191094332.393736.231390@w3g2000hsg.googlegroups.com>
Message-ID: <1191095884.449018.59860@22g2000hsm.googlegroups.com>

On Sep 29, 9:32 pm, stdazi <std... at gmail.com> wrote:
> On Sep 29, 6:07 pm, Michael.Coll-Ba... at VerizonWireless.com wrote:
>
> > You did not mention the OS, but because you are using
> > "pathname\editfile.txt", it sounds like you are using an MS OS.  From
> > past experience with various MS OSes, I found that as the number of
> > files in a directory increases the slower your process runs for each
> > file.
>
> how so?

Not entirely sure why, but some of the ms docs allude to the fact that
there is a linked list involved (at least for fat-style disks).

-- bjorn



From aleax at mac.com  Sun Sep  9 11:59:08 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 9 Sep 2007 08:59:08 -0700
Subject: Using s.sort([cmp[, key[,
	reverse]]]) to sort a list of objects based on a attribute
References: <1189173455.525144.326300@y42g2000hsy.googlegroups.com>
	<87k5r2zhd6.fsf@kip.sateh.com>
	<1189319685.273092.31830@r34g2000hsd.googlegroups.com>
	<87ejh86vrl.fsf@kip.sateh.com>
Message-ID: <1i460vg.1lrus8jsdn4qN%aleax@mac.com>

Stefan Arentz <stefan.arentz at gmail.com> wrote:

> Miki <miki.tebeka at gmail.com> writes:
> 
> > >   steps.sort(key = lambda s: s.time)
> > This is why attrgetter in the operator module was invented.
> > from operator import attrgetter
> > ...
> > steps.sort(key=attrgettr("time"))
> 
> Personally I prefer the anonymous function over attrgettr :)

However, Python disagrees with you...:

brain:~ alex$ python -mtimeit -s'from operator import attrgetter;
L=map(complex,xrange(999))' 'sorted(L, key=lambda x:x.real)'
1000 loops, best of 3: 567 usec per loop

brain:~ alex$ python -mtimeit -s'from operator import attrgetter;
L=map(complex,xrange(999))' 'sorted(L, key=attrgetter("real"))'
1000 loops, best of 3: 367 usec per loop

A speed-up of 35% is a pretty clear indicator of what _Python_ "prefers"
in this situation:-).


Alex


From stef.mientki at gmail.com  Sun Sep  9 17:05:24 2007
From: stef.mientki at gmail.com (stef mientki)
Date: Sun, 09 Sep 2007 23:05:24 +0200
Subject: Python syntax wart
In-Reply-To: <fc1hif$h2f$1@daisy.noc.ucla.edu>
References: <fbvvil$7dj$1@lust.ihug.co.nz> <fc1hif$h2f$1@daisy.noc.ucla.edu>
Message-ID: <46E46014.3040401@gmail.com>

James Stroud wrote:
> Lawrence D'Oliveiro wrote:
>   
>> The one thing I don't like about Python syntax is using backslashes to
>> continue lines. Yes, you can avoid them if you can include parentheses
>> somehow, but this isn't always possible.
>>
>> Possible:
>>
>>     if (
>>             quitting
>>         and
>>             len(client["to_write"]) == 0
>>         and
>>             len(client["read"]) + client["to_read"] == 0
>>     ) :
>>         close_client(client, "shutting down")
>>     #end if
>>
>> Not possible:
>>
>>     for \
>>         Link \
>>     in \
>>         GetEachRecord \
>>           (
>>             "links",
>>             ("from_episode",),
>>             "to_episode = %s",
>>             [EpisodeID],
>>             "order by when_created"
>>           ) \
>>     :
>>         out.write \
>>           (
>>                 "<P><A HREF=\"%s\">Back to episode %d</A>\n"
>>             %
>>                 (
>>                     LinkToMe({"ep" : Link["from_episode"]}),
>>                     Link["from_episode"]
>>                 )
>>           )
>>     #end for
>>  
>>     
>
>
> I usually write my code in a way that can be understood by looking at 
> it, with self-documenting names, clear organization, and lines that fit 
> under 72 characters (if I can help it). But if you insist on making perl 
> noise, go 'head.
>
>   
Interesting thread, in automatically converting another language to Python,
the brackets idea might come in very handy.

"Self-documenting names",
yes I'm used to that too, but Python itself doesn't promote that ...
... as "case-sensitive"  seems to me a contradiction with 
"self-documenting-names"  ;-)

cheers,
Stef Mientki



From gagsl-py2 at yahoo.com.ar  Wed Sep 26 03:36:40 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 26 Sep 2007 04:36:40 -0300
Subject: Hello Gabriel cant help noticing you
References: <op.ty8ua9v4x6zn5v@gabriel2.softlabbsas.com.ar>
	<41607.51503.qm@web27811.mail.ukl.yahoo.com>
Message-ID: <op.ty83feodx6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 26 Sep 2007 03:35:25 -0300, hrishy <hrishys at yahoo.co.uk> escribi?:

> I couldnt help but to write this mail.
>
> I am not a python programmer just a shell script coder
> and i am planning to learn some decent python and
> raise my level from a shell script junkie to a Python
> gentleman the way you explain things and show it in
> code is simply amazing.

Thanks! I feel somewhat embarrassed now :">
Glad to see you find my posts useful.

> I particularly liked the way you explained that
> Regular expression stuff to parse that XML i am just
> awestruck.

Thanks again! But parsing XML is not a good example of RE usage, so I  
don't like it so much.

-- 
Gabriel Genellina



From aine_canby at yahoo.com  Thu Sep 27 09:42:03 2007
From: aine_canby at yahoo.com (aine_canby at yahoo.com)
Date: Thu, 27 Sep 2007 06:42:03 -0700
Subject: Confusion regarding constructor as default value
In-Reply-To: <1190898221.833936.40480@57g2000hsv.googlegroups.com>
References: <1190898221.833936.40480@57g2000hsv.googlegroups.com>
Message-ID: <1190900523.963182.306590@r29g2000hsg.googlegroups.com>

On 27 Sep, 15:03, aine_ca... at yahoo.com wrote:
> Why are the following different?
>
> def AddRow(self, rowName, tableRow=TableRow(ReleaseDate(""),
> ExpiryDate(""))):
>                 # check to see if the row already exists, if not add it to the
> container
>
>                 if not self.dict.has_key(rowName):
>                         self.dict[rowName] = tableRow
>
> def AddRow(self, rowName, tableRow):
>                 # check to see if the row already exists, if not add it to the
> container
>
>                 if not self.dict.has_key(rowName):
>                         self.dict[rowName] = TableRow(ReleaseDate(""), ExpiryDate(""))
>
> It seems that when I use the first function that I'm getting duplicate
> objects in self.dict
>
> Thanks for your help,
>
> Aine.

I've just tried the following:

Function A:

def AddRow(self, rowName, tableRow=TableRow(ReleaseDate(""),
ExpiryDate(""))):

    print tableRow
    if not self.dict.has_key(rowName):
        self.dict[rowName] = tableRow

Function B:

def AddRow(self, rowName, tableRow=None):

    if tableRow==None:
    	tableRow = TableRow(ReleaseDate(""), ExpiryDate(""))
    # check to see if the row already exists, if not add it to the
container
    print tableRow
    if not self.dict.has_key(rowName):
        self.dict[rowName] = tableRow

Function A is giving:

<DatabaseExamination.TableRow instance at 0x011D4468>
<DatabaseExamination.TableRow instance at 0x011D42B0> same!
<DatabaseExamination.TableRow instance at 0x011D42B0> same!
<DatabaseExamination.TableRow instance at 0x011D42B0> same!
<DatabaseExamination.TableRow instance at 0x011D42B0> same!

Function B is giving:

<DatabaseExamination.TableRow instance at 0x011D0670>
<DatabaseExamination.TableRow instance at 0x011D0760>
<DatabaseExamination.TableRow instance at 0x011D07D8>
<DatabaseExamination.TableRow instance at 0x011D0850>


So at least I know know what is causing the problem. But I'm still not
understanding why I can't use TableRow() as the default value in order
to geterate new instances.

How would you implement this?

Thanks,

Aine.



From garyrob at mac.com  Fri Sep  7 12:19:47 2007
From: garyrob at mac.com (Gary Robinson)
Date: Fri, 7 Sep 2007 12:19:47 -0400
Subject: getting the current function
In-Reply-To: mailman.159.1189093808.2658.python-list@python.org
Message-ID: <20070907121947211621.e552cc95@mac.com>

> This all seems a bit too complicated. Are you sure you want to do
> this? Maybe you need to step back and rethink your problem.

In version 2.1 Python added the ability to add function attributes -- see http://www.python.org/dev/peps/pep-0232/ for the justifications. A counter probably isn't one of them, I just used that as a quick example of using thisfunc(). 

I've just never liked the fact that you have to name the function when accessing those attributes from within the function. And I thought there might be other uses for something like thisfunc().

-- 

Gary Robinson
CTO
Emergent Music, LLC
garyrob at mac.com
207-942-3463
Company: http://www.goombah.com
Blog:    http://www.garyrobinson.net


From ianare at gmail.com  Tue Sep  4 16:17:39 2007
From: ianare at gmail.com (=?iso-8859-1?B?aWFuYXLp?=)
Date: Tue, 04 Sep 2007 13:17:39 -0700
Subject: function call
Message-ID: <1188937059.459609.61850@57g2000hsv.googlegroups.com>

Hey all,

Is there a way of printing out how a function was called? In other
words if I do the following:

def someFunction(self):
    self.someOtherFunction(var1, var2)


I would get something like "someOtherFunction: called by:
someFunction, args are: var1, var2"

Thanks in advance

- ianar?



From grante at visi.com  Thu Sep  6 14:49:19 2007
From: grante at visi.com (Grant Edwards)
Date: Thu, 06 Sep 2007 18:49:19 -0000
Subject: library to launch program in linux
References: <1189103678.484278.321650@r34g2000hsd.googlegroups.com>
Message-ID: <13e0itfgm0ida1c@corp.supernews.com>

On 2007-09-06, idzwan.nizam at gmail.com <idzwan.nizam at gmail.com> wrote:

> I'm a new user. What library should I use so that I can launch
> program in linux using python? Thank you in advance.

subprocess

-- 
Grant Edwards                   grante             Yow! Hello, GORRY-O!!
                                  at               I'm a GENIUS from HARVARD!!
                               visi.com            


From martin at v.loewis.de  Tue Sep  4 17:40:14 2007
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Tue, 04 Sep 2007 23:40:14 +0200
Subject: FCGI app reloading on every request
In-Reply-To: <qwhDi.23908$eY.9978@newssvr13.news.prodigy.net>
References: <46DCDE59.8060109@animats.com>
	<MPG.21478b09a5d2650d989710@news.individual.de>
	<qwhDi.23908$eY.9978@newssvr13.news.prodigy.net>
Message-ID: <46DDD0BE.9080509@v.loewis.de>

>    Anything executable in the
> cgi-bin directory is being launched as a CGI program.  A file
> named "example.foo", if executable, will launch as a CGI program.
> Nothing launches with FCGI.

Perhaps you have a SetHandler declaration somewhere that makes all
files CGI by default? I would advise against Sethandler, and
recommend AddHandler instead.

Regards,
Martin


From pavlovevidence at gmail.com  Sat Sep 29 02:19:37 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sat, 29 Sep 2007 02:19:37 -0400
Subject: Python 3.0 migration plans?
References: <mailman.1213.1190971515.2658.python-list@python.org>
	<mailman.1224.1190987126.2658.python-list@python.org>
Message-ID: <46fdfbf1$0$24308$4c368faf@roadrunner.com>

On Fri, 28 Sep 2007 09:56:48 -0400, Stephan Deibel wrote:
> Ian Dickinson wrote:
>> Never would look like a good time scale to me given that a lot of the
>> stuff I use is being ripped out!!!!
> 
> Has any one actually converted any real code or significant bits of code
> using the 3.0 converter (in the sandbox somewhere), and if so what kinds
> of things actually failed?

Well, since the converter is designed to convert 2.6 and above, and since 
there isn't much Python 2.6 code out there yet, I'd say nothing 
significant.  :)

Anyways, it is not designed to convert arbitrary code that's lying 
around: it's designed to convert a supported subset of Python 2.6+ into 
Python 3.0.  You'd have to write "transitional Python" to use the tool.



Carl Banks


From shabda.raaj at gmail.com  Mon Sep 10 15:27:42 2007
From: shabda.raaj at gmail.com (shabda raaj)
Date: Mon, 10 Sep 2007 19:27:42 -0000
Subject: Getting error zipimport.ZipImportError: can't decompress data;
	zlib not available
Message-ID: <1189452462.021120.199680@50g2000hsm.googlegroups.com>

I have a VPS server with fedora 7.
I wanted to install easy_install on this server, but I got an error
saying
 unable to open /usr/lib/ > python2.5/config/Makefile (No such file or
directory).
So I installed the latest version of python from source.
Now when I am trying to install libraries, I am getting an error like,
"zipimport.ZipImportError: can't decompress data; zlib not available"



From python.list at tim.thechases.com  Sat Sep 29 21:43:50 2007
From: python.list at tim.thechases.com (Tim Chase)
Date: Sat, 29 Sep 2007 20:43:50 -0500
Subject: Optparse and help formatting?
Message-ID: <46FEFF56.9090501@tim.thechases.com>

I've been learning the ropes of the optparse module and have been
having some trouble getting the help to format the way I want.

I want to specify parts of an option's help as multiline.
However, the optparse formatter seems to eat newlines despite my
inability to find anything in optparse.py that does something
obvious like .replace("\n", " ") to eat the newlines I stick in
the help.  It also seems to mung tabs.  An example from my code:

parser.add_option("-x", "--extended",
  action="callback",
  callback=callback_test,
  type="string",  # required to get metavar to show in help
  dest="test",
  metavar="CONF",
  help="a comma-separated list of options.\n"
    "s=[YYYY]MMDD,n=NAME,c=COLOR\n"
    "s,start=[YYYY]MMDD\n"
    "\tstart day of period (default, current day)\n"
  ...
  )

which would accept options that looked something like

  test.py -x s=20070401,n=XR71,c=black

(my callback_test breaks apart parser.rargs[0] to deal with the
funky params).

However, when I display the help, its reformatting eats the
newlines in my help-string and strangely looks like it converts
my tabs to spaces.

Any hints on how to either work around the problem or fix it?

As a side note, I couldn't find documented anywhere that if you
have a "metavar" setting for a "callback" parameter, you have to
specify the "type" to get the metavar to show up in the help as
"-x CONF, --extended=CONF".  If you don't specify the type, it
will display as "-x, --extended" without the metavar, even if you
specify one.  Hackishly setting type="string" made the metavar
appear.

Thanks for any hints,

-tkc
(python2.4 on Debian, FWIW)






From dickinsm at gmail.com  Sun Sep  2 15:23:21 2007
From: dickinsm at gmail.com (Mark Dickinson)
Date: Sun, 02 Sep 2007 19:23:21 -0000
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
In-Reply-To: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
Message-ID: <1188761001.837509.175450@50g2000hsm.googlegroups.com>

On Sep 2, 7:51 am, jwrweather... at gmail.com wrote:
> The resulting executable takes 0.24 seconds to run. I'm not expecting
> a scripting language to run faster than native code, but I was
> surprised at how much slower it was in this case. Any ideas as to what
> is causing python so much trouble in the above code?

Below is some code and some timings that show that Python is spending
at least 1/3 of its time computing the squares: a*a, b*b and c*c. So
to explain why Python is so much slower than C, it should be enough to
explain what's going on with these multiplications.  Here's my attempt
at an explanation:

To compute a*a, Python has to do the following, all at run-time

(1) Find the type of a.
(2) Look up the corresponding multiplication method for this type.
(3) (In the multiplication method): find the type of the right-hand
side, in this case a again.
(4) Having established that both arguments are ints, worry about
whether the result is going to overflow (in which case a long needs to
be returned).
(5) Do the multiplication.
(6) Allocate a new Python integer to hold the result, and return it.

The C code only has to do step (5), and this boils down to a single
machine instruction.

Mark

Code and timings: (Python 2.5.1/G4.)

def test():
    solutions = [0] * 1000
    for a in xrange(1, 1000):
        for b in xrange(1, 1000 - a):
            for c in xrange(1, 1000 - a - b):
                if a*a + b*b == c*c:
                    solutions[a+b+c] += 1
    return solutions

def test2():
    solutions = [0] * 1000
    squares = [x*x for x in xrange(1000)]
    for a in xrange(1, 1000):
        for b in xrange(1, 1000 - a):
            for c in xrange(1, 1000 - a - b):
                if squares[a] + squares[b] == squares[c]:
                    solutions[a+b+c] += 1
    return solutions


>>> from profile import run
>>> run("l = test(); l2 = test2()")
         5 function calls in 299.984 CPU seconds

   Ordered by: standard name

   ncalls  tottime  percall  cumtime  percall
filename:lineno(function)
        1    0.010    0.010    0.010    0.010 :0(setprofile)
        1    0.000    0.000  299.973  299.973 <string>:1(<module>)
        1    0.000    0.000  299.984  299.984 profile:0(l = test(); l2
= test2())
        0    0.000             0.000          profile:0(profiler)
        1  182.262  182.262  182.262  182.262 test.py:1(test)
        1  117.711  117.711  117.711  117.711 test.py:10(test2)






From afaNOSPAM at neuf.fr  Thu Sep 13 18:24:15 2007
From: afaNOSPAM at neuf.fr (Amaury Forgeot d'Arc)
Date: Fri, 14 Sep 2007 00:24:15 +0200
Subject: Lost in __setstate__() in C++ and swig
In-Reply-To: <1884096.5YeUtxM9vj@beaureve.gmx.net>
References: <1884096.5YeUtxM9vj@beaureve.gmx.net>
Message-ID: <fccd9r$2d4l$1@talisker.lacave.net>

Hello,

Martin Drautzburg a ?crit :
> I am trying to cPickle/unpickle a C++ extension class with some private
> data members. I wrote __getstate__() and __setstate__ in C++ (I have
> to, due to the private data). Pickling writes the following file:
> 
>         ccopy_reg
>         _reconstructor
>         p1
>         (cpyramid
>         MidiBytes
>         p2
>         c__builtin__
>         object
>         p3
>         NtRp4
>         (S'some unknown MidiBytes'
>         I1
>         I2
>         I3
>         tb.
> 
> But when unpickling I get the following error
> 
>         TypeError: in method 'MidiBytes___setstate__', argument 1 of type 
>         'pyramid::MidiBytes *'
> 
> I debugged the swig wrapper and indeed the wrapper is called with just
> one tuple argument. No object seems to be present at the time.
> 
> All the examples I've seen use python functions for __getstate__ and
> __setstate__ and it seems to me that the object itself is already there
> when __setstate__ is called. 

Unpickling an object does not use the normal path for creating the 
object. More precisely, the __init__ method is not called! See
http://docs.python.org/dev/library/pickle.html#pickling-and-unpickling-normal-class-instances

I suggest that you try to play with __getinitargs__ or __getnewargs__.
By calling __init__, it will give a chance to Swig to allocate the C++ 
object.

> 
> In a moment of dispair I declared __setstate__() static and have it
> create and return a MidiBytes object. 
> 
>         MidiBytes *MidiBytes:: __setstate__ (PyObject * aTuple) {
>                 return new MidiBytes();
>         }
> 
> Then unpickling no longer complains about "argument 1", but the
> unpickled object does not work
> 
>         >>> nn = cPickle.load(FILE)
>         >>> nn.len()
>         Traceback (most recent call last):
>           File "<stdin>", line 1, in ?
>           File "/usr/src/sound.d/pyramid/pyramid.py", line 618, in len
>             return _pyramid.MidiBytes_len(*args)
>         TypeError: in method 'MidiBytes_len', argument 1 of
>         type 'pyramid::MidiBytes *'

This message is typical of a swig object whose __init__ method has not 
been called. (No later than today, I forgot to call the base.__init__ in 
a derived class. Maybe we should ask Swig for a better message)
See above for a hint. Hope this helps...


-- 
Amaury


From m.prajwala at gmail.com  Thu Sep 20 08:59:36 2007
From: m.prajwala at gmail.com (prajwala)
Date: Thu, 20 Sep 2007 12:59:36 -0000
Subject: how to convert xml file to word document.
Message-ID: <1190293176.702616.235480@e9g2000prf.googlegroups.com>

   I want to convert xml file to a word document using python. Is
there
any built in module available?
   or Is there any other way to convert xml file to word document.
  Please suggest me. This is very urgent now.

Thanks,
prajwala



From steve at holdenweb.com  Mon Sep 17 07:24:40 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 17 Sep 2007 07:24:40 -0400
Subject: Reading text files where last line has no EOL
In-Reply-To: <1190027021.235110.286450@g4g2000hsf.googlegroups.com>
References: <1190027021.235110.286450@g4g2000hsf.googlegroups.com>
Message-ID: <46EE63F8.8060703@holdenweb.com>

BlueBird wrote:
> I tried and failed to read text files where the last line does not
> contain proper EOL. For my tests, I use a file that I create with the
> equivalent of :
> 
> open('toto', 'w').write( '1234\n4567\n89AB' )
> 
> 
> My reading code looks like this :
> 
>        l = f.readline()
>         while len(l):
>             self.appendLine( l )
>             l = f.readline()
> 
> The last line is not returned (89AB) is never returned.
> 
> I tried with "for l in f" with similar results.
> 
> I read the doc :
> 
> In order to make a for loop the most efficient way of looping over the
> lines of a file (a very common operation), the next() method uses a
> hidden read-ahead buffer. As a consequence of using a read-ahead
> buffer, combining next() with other file methods (like readline())
> does not work right. However, using seek() to reposition the file to
> an absolute position will flush the read-ahead buffer. New in version
> 2.3.
> 
> I've tried to do a f.seek( f.tell() ) but that did not help.
> 
> So how am I supposed to fetch that last line ?
> 
What version of Python are you using, and on what platform? WJFFM on 
2.5.1/Cygwin:

 >>> open('toto', 'w').write( '1234\n4567\n89AB' )
 >>> for l in open('toto'):
...   print l
...
1234

4567

89AB
 >>>

You will observe that the last line is presented, but correctly does not 
include a trailing line feed.

regards
  Steve

-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From rami.mawas at gmail.com  Thu Sep 13 01:12:54 2007
From: rami.mawas at gmail.com (rami.mawas at gmail.com)
Date: Thu, 13 Sep 2007 05:12:54 -0000
Subject: Implementing a fixed size stack for an RPN Calculator
In-Reply-To: <5kr5hoF4s6gmU3@mid.uni-berlin.de>
References: <1189630522.152326.3040@d55g2000hsg.googlegroups.com>
	<5kr5hoF4s6gmU3@mid.uni-berlin.de>
Message-ID: <1189660374.063395.71360@50g2000hsm.googlegroups.com>

On Sep 12, 2:55 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Wed, 12 Sep 2007 20:55:22 +0000, rami.ma... at gmail.com wrote:
> > I have implemented an RPN calculator in python but now I would like to
> > make the stack size fixed. how can I transform the user's RPN
> > expression from a stack overflow to a computable expression.
>
> > For instance, if my stack size is 2 then the some expression can't be
> > computed but could be transformed as following:
>
> > Non computable expression: 1 2 3 + +   --> stack size of 3 is needed
> > Computable expression: 1 2 + 3 +         --> stack size of 2 is needed
>
> > How can I define a formal way of transforming the non computable
> > expression to computable one.
>
> > My RPN only implements: + - x %
>
> Why does this homework assignment limit the stack so severely!?  ;-)
>
> Ciao,
>         Marc 'BlackJack' Rintsch


The problem is not with the stack being severely small or not, it
could be 1000 but it should be fixed and that's the limitation.



From tuomas.vesterinen at pp.inet.fi  Wed Sep  5 04:27:36 2007
From: tuomas.vesterinen at pp.inet.fi (Tuomas)
Date: Wed, 05 Sep 2007 08:27:36 GMT
Subject: Undeterministic strxfrm?
In-Reply-To: <mailman.59.1188963931.2658.python-list@python.org>
References: <ixaDi.63$327.50@read3.inet.fi>	<mailman.37.1188933223.2658.python-list@python.org>	<lKiDi.237$327.182@read3.inet.fi>	<fbkhdb$epk$00$1@news.t-online.com>	<htnDi.259$327.117@read3.inet.fi>
	<mailman.59.1188963931.2658.python-list@python.org>
Message-ID: <YLtDi.104$%R6.37@read3.inet.fi>

Gabriel Genellina wrote:
> I think it's not in the issue tracker - see  
> http://xforce.iss.net/xforce/xfdb/34060
> The fix is already in 2.5.1  
> http://www.python.org/download/releases/2.5.1/NEWS.txt

Thanks Gabriel, I'll try Python 2.5.1.

>> Reading the rev 54669 it seems to me, that the bug is not fixed. Man  
>> says:
>>
>> STRXFRM(3): ... size_t strxfrm(char *dest, const char *src, size_t n);
>> ... The first n characters of  the  transformed  string
>> are  placed in dest.  The transformation is based on the program?s
>> current locale for category LC_COLLATE.
>> ... The strxfrm() function returns the number of bytes required to
>> store  the transformed  string  in dest excluding the terminating ?\0?
>> character.  If the value returned is n or more, the contents of dest are
>> *indeterminate*.
>>
>> Accordin the man pages Python should know the size of the result it
>> expects and don't trust the size strxfrm returns. I don't completely
>> understand the collate algorithm, but it should offer different levels
>> of collate. So Python too, should offer those levels as a second
>> parameter. Hovever strxfrm don't offer more parameters either except
>> there is another function strcasecmp. So Python should be able to
>> calculate the expected size before calling strxfrm or strcasecmp. I
>> don't how it is possible. May be strcoll knows better and I should kick
>> strxfrm off and take strcoll instead. It costs converting the seach key
>> in every step of the search.
> 
> 
> No. That's why strxfrm is called twice: the first one returns the 
> required  buffer size, the buffer is resized, and strxfrm is called 
> again. That's a  rather common sequence when buffer sizes are not known 
> in advance.
> [Note that `dest` is indeterminate, NOT the function return value which  
> always returns the required buffer size]
> 

OK, I made too quick conclusions of the man text without knowing the 
details.

Tuomas


From dickinsm at gmail.com  Sun Sep  2 10:10:31 2007
From: dickinsm at gmail.com (Mark Dickinson)
Date: Sun, 02 Sep 2007 14:10:31 -0000
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
In-Reply-To: <1188740716.423349.304370@y42g2000hsy.googlegroups.com>
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
	<1188735642.391419.103650@19g2000hsx.googlegroups.com>
	<1188740716.423349.304370@y42g2000hsy.googlegroups.com>
Message-ID: <1188742231.470668.29910@g4g2000hsf.googlegroups.com>

On Sep 2, 9:45 am, jwrweather... at gmail.com wrote:
> [snip code]
>
> Thanks for that. I realise that improving the algorithm will speed
> things up. I wanted to know why my less than perfect algorithm was so
> much slower in python than exactly the same algorithm in C. Even when
> turning off gcc's optimiser with the -O0 flag, the C version is still
>
> > 100 times quicker.

Well, for one thing, you're creating half a million xrange objects in
the course of the search.  All the C code has
to do is increment a few integers.

Mark



From gagsl-py2 at yahoo.com.ar  Mon Sep 10 18:34:47 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 10 Sep 2007 19:34:47 -0300
Subject: Setting stdout encoding
References: <1189416350.069995.220250@w3g2000hsg.googlegroups.com>
	<cfb578b20709100602i4146f5c0hd2a1343f644a90f@mail.gmail.com>
Message-ID: <op.tygmb9nux6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 10 Sep 2007 10:02:42 -0300, Fabio Zadrozny <fabiofz at gmail.com>  
escribi?:

>> Does someone know if there's a way to explicitly set the stdout/stderr/
>> stdin
>> encoding that python should use?
>>
>> The encoding can be set using the C API for file objects - from Python
>> code, use ctypes:
>>
>>
> Yeap, but that would leave me with the original problem: I need to run a
> script to run the original script I want to run...(and not being  
> compatible
> with other python implementations). Isn't there any way to set that
> externally (like environment variable, args to the interpreter or  
> anything
> else like that)?

You could place code like that on sitecustomize.py
I think this should be fixed on Eclipse/pydev. If they replace sys.stdout  
with a different object - they should make sure it has the right behavior.  
Same for IDLE if it's broken too.

-- 
Gabriel Genellina



From steven at REMOVE.THIS.cybersource.com.au  Fri Sep  7 06:40:47 2007
From: steven at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Fri, 07 Sep 2007 10:40:47 -0000
Subject: unexpected behavior: did i create a pointer?
References: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>
	<46e11dfe$0$4517$9b4e6d93@newsspool3.arcor-online.net>
Message-ID: <pan.2007.09.07.10.40.46@REMOVE.THIS.cybersource.com.au>

On Fri, 07 Sep 2007 11:46:38 +0200, Wildemar Wildenburger wrote:

> gu wrote:
>> hi to all!
>> after two days debugging my code, i've come to the point that the
>> problem was caused by an unexpected behaviour of python. or by lack of
>> some information about the program, of course! i've stripped down the
>> code to reproduce the problem:
>> 
>> [snip FAQ]
> 
> Yes, basically you *created* a pointer. That's all that python has:
> pointers.

No, you are confusing the underlying C implementation with Python. Python 
doesn't have any pointers. CPython is implemented with pointers. PyPy, 
being written entirely in Python, is implemented with Python objects like 
lists and dicts. Jython, being implemented in Java, probably isn't 
implemented with pointers either -- although of course the underlying 
Java compiler might be. IronPython and Python for .Net, I have no idea 
how they work. Could be magic for all I know. (Probably necromancy.) 

Naturally, regardless of whether you are using CPython, IronPython, PyPy 
or some other variety of Python, the objects available to you include 
ints, floats, strings, lists, dicts, sets and classes... but not pointers.

Nor does it include "peek" and "poke" commands for reading and writing 
into random memory locations. Python is not C, and it is not Basic, nor 
is it Forth or Lisp or assembler, and you shouldn't hammer the round peg 
of Python objects into the square hole of C pointers.



-- 
Steven.


From gherron at islandtraining.com  Fri Sep 28 12:01:21 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Fri, 28 Sep 2007 09:01:21 -0700
Subject: Delete spaces
In-Reply-To: <1190994234.526554.110870@y42g2000hsy.googlegroups.com>
References: <1190994234.526554.110870@y42g2000hsy.googlegroups.com>
Message-ID: <46FD2551.7010309@islandtraining.com>

koutoo at hotmail.com wrote:
> If I have a text file that is delimited by spaces, how do I import it
> and get to comma delimited?  Here is a row of data from the text file:
>
> 1    1    10:55:14  2    65   8.5
> 1.4+1.1                       2.5       Class-2   0
>
> I tried a few examples from the group and it didn't work, since the
> file also has a header row and a row of seperators ( -------).  The
> lengths of each row is something like 130, so there are extra spaces
> after the last value as well.  I have tried joining and other things,
> but I couldn't figure out how to get the values to come together.
> Thanks.
>
> Kou
>
>   

After you recognize and handle the header and separator lines, the
remaining lines can be handled this way:

>>> l = '1    1    10:55:14  2    65   8.5'
>>> f = l.split()
>>> print f
['1', '1', '10:55:14', '2', '65', '8.5']

>>> ','.join(f)
'1,1,10:55:14,2,65,8.5'

or

>>> ', '.join(f)
'1, 1, 10:55:14, 2, 65, 8.5'
>>>

Gary Herron




From jfine at pytex.org  Tue Sep 18 13:11:49 2007
From: jfine at pytex.org (Jonathan Fine)
Date: Tue, 18 Sep 2007 18:11:49 +0100
Subject: Metatest 0.1.0
References: <mailman.721.1190126947.2658.python-announce-list@python.org>
	<1190130384.753009.142150@i13g2000prf.googlegroups.com>
Message-ID: <46F006D5.3060609@pytex.org>

Kay Schluehr wrote:

>>     http://metatest.sourceforge.net/doc/pyconuk2007/metatest.html

>From the HTML slides:
> 
>    Assertion tests are easy to write but report and run poorly.
> 
> I tend to think this is a prejudice that leads to ever more ways to
> write tests perform test discoveries, invent test frameworks etc.
> 
> When I thought about organizing my tests for EasyExtend I was seeking
> for a strategy being adapted to my own behaviour. The very first step
> I made when creating a new language, modifying a grammar rule,
> changing the Transformer etc. was starting an interactive shell and
> typing some commands. 

Yes, Python is really good for that.  I do it a lot also.

> This is just checking out or smoke testing my
> application and I wanted to reproduce it. So I recorded the
> interactive shell session and replayed it as another shell session. I
> enabled to set breakpoints in the logged output and implemented a
> command for proceeding the replay.

This is similar, I think, to what Metatest does.  See 
http://metatest.sourceforge.net/doc/pyconuk2007/metatest.html#slide5

> Then I discovered I actually wrote an interactive test runner. I don't
> have to care for all the exceptions being thrown in the session and
> don't care for cleanups but just assign parts of the session as tests
> using assert for getting an overview at the end. The only additonal
> command I implemented was raises to capture the side-effect of raising
> an exception.

Sounds interesting.  Is this code, or examples of its use, available?

> So I'm going to argue here that there isn't anything particular about
> writing/coding a test ( planning tests, specifying tests, reviewing a
> testspecification etc. are another issue ). Instead you can keep a
> seemingly unrelated practice and turn it into a test by a tiny
> signification.

I'm all in favour of making tests easier to write, easier to run, and 
the outputs easier to understand.

I've submitted a feature request for command line use of Metatest 
(something I've been thinking of a while):
http://sourceforge.net/tracker/index.php?func=detail&aid=1797187&group_id=204046&atid=988038

Here's how I'd like the feature to look (from the above URL):
===
Python 2.4.1a0 (#2, Feb 9 2005, 12:50:04)
[GCC 3.3.5 (Debian 1:3.3.5-8)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> from metatest.py.mymod import plus
 >>> import metatest
 >>> plus(2, 3) == 6
<MyStub 4>
 >>> metatest.immediate = True # New command
 >>> plus(2, 3) == 6
TestError: Expected '6', got '5'
 >>>
===

OK.  So now here's a problem.  We can create stuff like the above that 
states clearly (I hope) what is required.  How can we write a test for 
this sort of behaviour?  So that's another feature request.

While I'm in favour of using Metatest to write tests for Metatest 
(eating your own dogfood), I'm more interested in real world examples. 
But I've added second feature request, that Metatest be able to test 
Metatest.
http://sourceforge.net/tracker/index.php?func=detail&aid=1797202&group_id=204046&atid=988038

-- 
Jonathan



From exhuma at gmail.com  Mon Sep 24 11:29:13 2007
From: exhuma at gmail.com (exhuma.twn)
Date: Mon, 24 Sep 2007 08:29:13 -0700
Subject: (pyqt) Parameters when connecting a signal to a method?
In-Reply-To: <5lq0vhF9gj62U1@mid.uni-berlin.de>
References: <1190644558.386647.88270@22g2000hsm.googlegroups.com>
	<5lq0vhF9gj62U1@mid.uni-berlin.de>
Message-ID: <1190647753.019994.212890@d55g2000hsg.googlegroups.com>

On Sep 24, 4:47 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> exhuma.twn wrote:
> > Some code:
>
> > ----------------------------------------------------------------------
>
> > def foobar(w):
> >    print w
>
> > QtCore.QObject,connect( my_line_edit,
> > QtCore.SIGNAL("returnPressed()"), foobar )
>
> > ----------------------------------------------------------------------
>
> > How can I get this to work so "foobar" prints out the sender of the
> > signal (i.e. my_line_edit)?
>
> I _think_ there is a way to get the signals sender in Qt itself. But I'm
> unsure how to get that.
>
> Alternatively, you can use a closure to create a reference:
>
> def foobar(source, w):
>    print w
>
> def slotgen(source, slot):
>     def _slot(*args):
>         return slot(*((source,) + args))
>     return _slot
>
> my_slot = slotgen(my_line_edit, foobar)
>
> QtCore.QObject,connect( my_line_edit,
> QtCore.SIGNAL("returnPressed()"), my_slot )
>
> However, be careful to keep a reference to my_slot around! Otherwise, it
> will be garbage collected!
>
> diez

Thanks diez. This works :)
Although, I still have to digest *what* this closure does, but I will
leave this as an exercise to myself. ;)



From gagsl-py2 at yahoo.com.ar  Sun Sep 23 17:21:45 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 23 Sep 2007 18:21:45 -0300
Subject: Preemption in python
References: <9a4753250709221928s5768b15emecfd71a0f476cce@mail.gmail.com>
	<1190572311.5703.4.camel@thinkpad>
	<9a4753250709231210l701a2cccge014732c79a5fdf9@mail.gmail.com>
Message-ID: <op.ty4lmjflx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 23 Sep 2007 16:10:03 -0300, Kurtis Heimerl <munncha at gmail.com>  
escribi?:

> I'll explain a bit more. This thread is spawned, I also have the main  
> thread
> running a gtk windowed gui. The gui has it's own threads to deal with  
> button
> presses and such. The problem is that the gui never seems to let anyone  
> else
> run. Only on button presses that cause blocking calls (
> ossaudiodev.audio.read for instance) does the reader thread print  
> anything.

Google for "python gtk threading tutorial"

-- 
Gabriel Genellina



From http  Sat Sep  1 02:35:42 2007
From: http (Paul Rubin)
Date: 31 Aug 2007 23:35:42 -0700
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<7xlkbsmqe4.fsf@ruckus.brouhaha.com>
	<1188525647.003223.199620@q5g2000prf.googlegroups.com>
	<mailman.181.1188527203.28954.python-list@python.org>
	<slrnfdg413.1e8.horpner@FIAD06.norwich.edu>
	<1188589721.367781.322150@z24g2000prh.googlegroups.com>
Message-ID: <7xabs6gaf5.fsf@ruckus.brouhaha.com>

Russ <uymqlp502 at sneakemail.com> writes:
> The idea here is that errors in the self-testing code are unlikely
> to be correlated with errors in the primary code. Hence, you get a
> sort of multiplying effect on reliability. For example, if the
> chance of error in the primary code and the self-test code are each
> 0.01, the chance of an undetected error is approximately 0.01^2 or
> 0.0001.

But I think you give a lot of that back when you turn the checks off.
The errors you detect when the checks are enabled are only the ones
that result from your test data.  Turn off the checks and expose the
application to data from a potentially different distribution, and
you're back where you started.


From BjornSteinarFjeldPettersen at gmail.com  Sun Sep 16 19:35:10 2007
From: BjornSteinarFjeldPettersen at gmail.com (thebjorn)
Date: Sun, 16 Sep 2007 23:35:10 -0000
Subject: adding a static class to another class
In-Reply-To: <mailman.629.1189984482.2658.python-list@python.org>
References: <mailman.629.1189984482.2658.python-list@python.org>
Message-ID: <1189985710.946694.219420@g4g2000hsf.googlegroups.com>

On Sep 17, 1:14 am, "Nathan Harmston" <ratchetg... at googlemail.com>
wrote:
> HI,
>
> I m trying to start an api in a similar way to the djangic way of
> Class.objects.all(). Ie objects is a "Manager" class.
>
> So:
>
> class Foo(object):
>    def __init__(self):
>         self.test = "NEE"
>
> class Manager(object):
>     def __init__(self):
>         pass
>    def all(self):
>        return "COCONUTS"
>
> Because of how some of the code is set up I cant use
> metaclasses........so I try to use a decorator:
>
> def addto(instance):
>     def decorator(f):
>         import new
>         f = new.instancemethod(f, instance, instance.__class__)
>         setattr(instance, "objects", f)
>         return f
>     return decorator
>
> class Manager(object):
>     @addto(Foo)
>     def __init__(self):
>        .............
>
> however this only binds the init method to the Foo.objects, so not
> what I want. If I try using classmethod...then it just says the
> Foo.objects doesnt exist.
>
> Does anyone have any ideas how I can accomplish this using decorators?
> And also preventing more than one Manager instance instantiated at one
> time.
>
> Many Thanks in advance,
>
> Nathan

You want to use descriptors (classes that implement __get__, __set__,
__del__). Google for the particulars.

-- bjorn



From michele.simionato at gmail.com  Wed Sep 19 07:36:51 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Wed, 19 Sep 2007 11:36:51 -0000
Subject: super() doesn't get superclass
In-Reply-To: <87fy1a6h3b.fsf@mulj.homelinux.net>
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au>
	<46f0fba0$0$29605$426a34cc@news.free.fr>
	<1190199134.791808.267110@22g2000hsm.googlegroups.com>
	<87fy1a6h3b.fsf@mulj.homelinux.net>
Message-ID: <1190201811.727402.172330@k79g2000hse.googlegroups.com>

On Sep 19, 1:16 pm, Hrvoje Niksic <hnik... at xemacs.org> wrote:
> Your arguments against the superclass term seem to assume that there
> is only a single superclass to a particular class.

If you say "the" superclass, then you also assume it is unique. But
the big issue
is that the order of the methods depends on the second argument to
super, the instance,
so there is no useful concept of the superclass of the first argument
of super.
I rest my case.

 Michele Simionato



From bjorn.kempen at gmail.com  Sat Sep 15 17:24:18 2007
From: bjorn.kempen at gmail.com (buffi)
Date: Sat, 15 Sep 2007 21:24:18 -0000
Subject: problems using pythom tempfile module
In-Reply-To: <1189890699.807384.258580@o80g2000hse.googlegroups.com>
References: <1189890699.807384.258580@o80g2000hse.googlegroups.com>
Message-ID: <1189891458.583774.171030@22g2000hsm.googlegroups.com>

On Sep 15, 11:11 pm, "samir.... at googlemail.com"
<samir.... at googlemail.com> wrote:
> Hello everyone,
>
> I'm trying to test the tempfile module with the following script,
> which basically creates a temporary file, fills the file with some
> test data and prints it.
>
> import tempfile
>
> t = tempfile.TemporaryFile()
> t.write("lalalala")
> t.flush()
> print t.read()
>
> Unfortunately, the print statement gives me an empty string. Can
> somebody tell me what I'm doing wrong ?
>
> regards Samir

Do a t.seek(0) before you do the read to "rewind" the file and then it
should work.



From steve at REMOVE-THIS-cybersource.com.au  Fri Sep 21 19:33:35 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Fri, 21 Sep 2007 23:33:35 -0000
Subject: Calling constructor but not initializer
References: <13f7kmfhe19lb7b@corp.supernews.com>
	<mailman.870.1190386052.2658.python-list@python.org>
Message-ID: <13f8l6fs0ukfu57@corp.supernews.com>

On Fri, 21 Sep 2007 10:47:02 -0400, Steve Holden wrote:

[snippity-doo-dah]

>> but of course __init__ is automatically called.
>> 
>> 
>> Any suggestions for doing something like this?
>> 
>> 
> Easy: use a method whose name is something other than __init__, then
> don't bother to implement __init__. Note that __new__ shouldn't call
> __init__ anyway, that's done by the instance creation mechanism.

*stares at post*

You know, I must have been REALLY tired last night, because that is 
extraordinarily obvious.

Even more obvious is not to use __new__ at all, and just wrap the body of 
the __init__ in an "if instance should not be empty" clause.

Thanks to everyone for answering my stupid question without laughing.


-- 
Steven.


From michael at stroeder.com  Wed Sep  5 03:07:25 2007
From: michael at stroeder.com (=?UTF-8?B?TWljaGFlbCBTdHLDtmRlcg==?=)
Date: Wed, 05 Sep 2007 09:07:25 +0200
Subject: FCGI app reloading on every request
In-Reply-To: <qwhDi.23908$eY.9978@newssvr13.news.prodigy.net>
References: <46DCDE59.8060109@animats.com>
	<MPG.21478b09a5d2650d989710@news.individual.de>
	<qwhDi.23908$eY.9978@newssvr13.news.prodigy.net>
Message-ID: <d612r4-054.ln1@nb2.stroeder.com>

John Nagle wrote:
> 
>    Tried putting this in the .htaccess file:
> 
> <Files *.fcgi>
> SetHandler fcgid-script
> Options ExecCGI
> allow from all
> </Files>
> 
> <Files *.foo>
> ErrorDocument 403 "File type not supported."
> </Files>
> 
>     Even with that, a ".foo" file gets executed as a CGI script,
> and so does a ".fcgi" file.  It's an Apache configuration problem.

Are you sure that the server configuration allows overriding this in the
.htaccess file?

Ciao, Michael.


From tdelaney at avaya.com  Mon Sep 24 01:19:41 2007
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Mon, 24 Sep 2007 13:19:41 +0800
Subject: I could use some help making this Python code run faster
	usingonly Python code.
In-Reply-To: <1190491371.189556.177790@d55g2000hsg.googlegroups.com>
Message-ID: <E4C7BCAB1872014F81CEAACD25699B8C0849A0@301081ANEX2.global.avaya.com>

Python Maniac wrote:

> Some benchmarks showing the effectiveness of using Psyco:
> 
> scramble:       4.210
> scramble_listcomp:      2.343
> scramble_gencomp:       2.599
> scramble_map:   1.960
> scramble_imap:  2.231
> scramble_dict:  2.387
> scramble_dict_map:      0.535
> scramble_dict_imap:     0.726
> scramble_translate:     0.010
> 
> Now with Psyco...
> psyco.bind(scramble)...
> scramble:       0.121   4.088   34.670x faster
> scramble_listcomp:      0.215   2.128   10.919x faster
> scramble_gencomp:       2.563   0.036   1.014x faster
> scramble_map:   2.002   -0.043  0.979x slower
> scramble_imap:  2.175   0.056   1.026x faster
> scramble_dict:  0.199   2.188   11.983x faster
> scramble_dict_map:      0.505   0.029   1.058x faster
> scramble_dict_imap:     0.728   -0.001  0.998x slower
> scramble_translate:     0.009   0.001   1.111x faster
> 
> Overall, Psyco helped my little process of converting 20 MB worth of
> ASCII into what may not look like the original at 6x faster than
> without Psyco.

One thing you should notice with the above results:

Psyco made your initial, totally unoptimised algorithm the fastest of
all (except for translate, which is in a different league of course -
but is much more limited in what it can do).

The other algorithms are already heavily working in C code (dicts, etc),
but the initial algorithm provided lots of opportunities for Psyco to
hook in and use the runtime behaviour.

So, before trying to optimise, see if Psyco gives you the performance
you need.

Tim Delaney


From imageguy1206 at gmail.com  Fri Sep  7 07:35:34 2007
From: imageguy1206 at gmail.com (imageguy)
Date: Fri, 07 Sep 2007 04:35:34 -0700
Subject: py2exe - change name of exe created
Message-ID: <1189164934.544314.170020@w3g2000hsg.googlegroups.com>

I have a setup script like this;

setup(windows = [{"script":"myprogram.py",
	           "icon_resources":[(0,"nabbitt.ico")],
	            "other_resources": [(24,1,manifest)]}
],
		name = "Nabbitt ver 0.1",
		data_files = [("",rootdata)],
		zipfile = None,
		options = {"py2exe": {
						"compressed" : 1,
						"dll_excludes": ["w9xpopen.exe"],  #should also exclude
MSVCR71.dll
						"bundle_files": 3             # 1=Single .exe, 2=.exe with
pythonXX.dll
						}
						},
		)



From tim.couper at scivisum.co.uk  Sat Sep  1 06:20:19 2007
From: tim.couper at scivisum.co.uk (Tim Couper)
Date: Sat, 01 Sep 2007 11:20:19 +0100
Subject: So what exactly is a complex number?
In-Reply-To: <46d92f54$0$4533$9b4e6d93@newsspool3.arcor-online.net>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>	<mailman.212.1188576194.28954.python-list@python.org>	<451mq4-les.ln1@ozzie.tundraware.com>	<46d89ba9$0$30380$9b4e6d93@newsspool4.arcor-online.net>	<fbamkq$r7q$5@lust.ihug.co.nz>
	<46d92f54$0$4533$9b4e6d93@newsspool3.arcor-online.net>
Message-ID: <46D93CE3.2040404@scivisum.co.uk>

.. FWIW the fundamental difference in using complex number to represent 
purely vector information is that the algebra of complex numbers is such 
that the product of two of the imaginary components has a result in the 
real range (and a product of a real and imaginary components is in the 
imaginary range, etc); so what you are modelling should have this 
behaviour if you're using complex numbers to represent it;  otherwise a 
vector representation could be more appropriate. So in areas of physics 
where complex number representations are used, rather than vector, it's 
because this this algebra *is* appropriate. Now, if you're modelling 
entities that has up to 2 numeric components, which dos not have this 
"complex number" behaviour, and you're at most going to add and subtract 
these, then the representation of this as vector or complex number model 
are indeed identical. This could, however, be considered a special, or 
at least a simple, case.

Dr Tim Couper
CTO, SciVisum Ltd

www.scivisum.com



Wildemar Wildenburger wrote:
> Lawrence D'Oliveiro wrote:
>   
>> In message <46d89ba9$0$30380$9b4e6d93 at newsspool4.arcor-online.net>, Wildemar
>> Wildenburger wrote:
>>
>>     
>>> Tim Daneliuk wrote:
>>>       
>>>> One of the most common uses for Complex Numbers is in what are
>>>> called "vectors".  In a vector, you have both an amount and
>>>> a *direction*.  For example, I can say, "I threw 23 apples in the air
>>>> at a 45 degree angle".  Complex Numbers let us encode both
>>>> the magnitude (23) and the direction (45 degrees) as a "number".
>>>>
>>>>         
>>> 1. Thats the most creative use for complex numbers I've ever seen. Or
>>> put differently: That's not what you would normally use complex numbers
>>> for.
>>>       
>> But that's how they're used in AC circuit theory, as a common example.
>>     
>  >
> OK, I didn't put that in the right context, I guess. The "magnitude and 
> direction" thing is fine, I just scratched my head at the "23 apples at 
> 45 degrees" example. Basically because I see no way of adding 2 apples 
> at 16 degrees to 4 apples at 25 degrees and the result making any sense.
> Anyway, that was just humorous nitpicking on my side, don't take it too 
> seriously :).
>
> /W
>   


From ben at benfinney.id.au  Tue Sep 18 00:15:25 2007
From: ben at benfinney.id.au (Ben Finney)
Date: Tue, 18 Sep 2007 14:15:25 +1000
Subject: super() doesn't get superclass
Message-ID: <8764281uea.fsf@benfinney.id.au>

Howdy all,

After banging my head against super() trying to reliably get
attributes of a superclass, I gained a little enlightenment when this
turned up in a search:

    "Python's Super is nifty, but you can't use it
    (Previously: Python's Super Considered Harmful)"
    <URL:http://fuhm.org/super-harmful/>

An early paragraph stood out that made my current problems clear:

    One big problem with 'super' is that it sounds like it will cause
    the superclass's copy of the method to be called. This is simply
    not the case, it causes the next method in the MRO to be called.

Oh. The author's right, I got that mistaken impression too. Obviously,
then, I must have misread the documentation of 'super'. I went back to
double-check, and was appalled to find:

    super(type[, object-or-type])
    Return the superclass of type. [...]

    <URL:http://docs.python.org/lib/built-in-funcs.html#l2h-72>

Why does the documentation of 'super' say that it returns the
superclass when *that's not true*? It doesn't return the superclass,
it returns the next class in the MRO, whether that's a superclass or
not.

Actually, even that's not true. The error message "AttributeError:
'super' object has no attribute 'bazfunc'" makes it clear that 'super'
actually returns not the superclass, but a 'super' object, whatever
that's supposed to be.


After reading the rest of the article, I'm amazed that 'super' as
currently implemented is in Python at all. I agree with the author
that it's useless unless *everyone* uses it for *everything*, and even
then it's pretty limited.

One thing's for sure, it's badly misnamed, and falsely documented.

Can anyone point me to a counter-argument to the above article?

-- 
 \        "The World is not dangerous because of those who do harm but |
  `\          because of those who look at it without doing anything." |
_o__)                                                 ?Albert Einstein |
Ben Finney


From irstas at gmail.com  Fri Sep 28 14:06:07 2007
From: irstas at gmail.com (irstas at gmail.com)
Date: Fri, 28 Sep 2007 18:06:07 -0000
Subject: Can I overload the compare (cmp()) function for a Lists ([])
	index function?
In-Reply-To: <1191000652.430036.288400@y42g2000hsy.googlegroups.com>
References: <1191000652.430036.288400@y42g2000hsy.googlegroups.com>
Message-ID: <1191002767.350147.153910@57g2000hsv.googlegroups.com>

On Sep 28, 8:30 pm, xkenneth <xkenn... at gmail.com> wrote:
> Looking to do something similair. I'm working with alot of timestamps
> and if they're within a couple seconds I need them to be indexed and
> removed from a list.
> Is there any possible way to index with a custom cmp() function?
>
> I assume it would be something like...
>
> list.index(something,mycmp)
>
> Thanks!

Wouldn't it be enough to get the items that are "within a couple of
seconds" out of the list and into another list. Then you can process
the other list however you want. Like this:

 def isNew(x):
     return x < 5

 data = range(20)
 print data
 out, data = filter(isNew, data), filter(lambda x: not isNew(x), data)
 print out, data

Why do you want to use 'index'?

Your suggestion "list.index.__cmp__ = mycmp" certainly doesn't do
anything good. In fact, it just fails because the assignment is
illegal.. I don't think any documentation suggests doing that, so why
are you even trying to do that? It's just not a good idea to invent
semantics and hope that they work, in general.



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Sep 20 12:49:52 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 20 Sep 2007 18:49:52 +0200
Subject: An Editor that Skips to the End of a Def
In-Reply-To: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
Message-ID: <46f2a49b$0$15456$426a74cc@news.free.fr>

W. Watson a ?crit :
> Is there an editor that allows one to position to put the cursor and 
> then by pushing some button goes to the end of the def?

Emacs. And you don't even have to "push some button" (just remember the 
correct key sequence !-)


From mbac at gpshopper.com  Thu Sep 13 19:57:21 2007
From: mbac at gpshopper.com (Michael Bacarella)
Date: Thu, 13 Sep 2007 19:57:21 -0400
Subject: httplib hangs in read / strace says recvfrom()
Message-ID: <46E9CE61.7000706@gpshopper.com>

Hi list,

I'm 99% sure httplib is sporadically hanging when I call read() on the
HTTPResponse object (r.status == 200).

Evidence:
    straceing the process shows it's blocked in recvfrom()
    ls -la /proc/pid/fd shows the socket-id for recvfrom() file 
descriptor (3)
    lsof -n | grep socket-id shows the connection to the HTTP server (on 
localhost:8080)
    tcpdump -s 10000 -XXX -i lo port 8080 shows a response IS coming 
over the wire

This seems to be a common problem (according to the internets) but
I haven't seen a resolution or explanation posted.

I've tried httplib.py from Python 2.3 and also dropped in the one from
Python 2.5 with no difference.  Running on Linux kernel 2.6 (CentOS's, 
specifically).

Any responses CC me as I'm not subscribed [since Python has worked so
flawlessly for me otherwise <g>]

-- 
Michael Bacarella <mbac at gpshopper.com>
Director of Technology

1-212-488-2222 (office)
1-646-641-8662 (mobile)

http://gpshopper.com/
http://slifter.com/

GPSHOPPER, LLC
307 Seventh Avenue
Suite 2104
New York, NY 10001



From Graham.Dumpleton at gmail.com  Thu Sep 27 19:41:47 2007
From: Graham.Dumpleton at gmail.com (Graham Dumpleton)
Date: Thu, 27 Sep 2007 23:41:47 -0000
Subject: mod_python preprocess/filter before proxy
In-Reply-To: <mailman.1151.1190892781.2658.python-list@python.org>
References: <mailman.1151.1190892781.2658.python-list@python.org>
Message-ID: <1190936507.059142.169060@y42g2000hsy.googlegroups.com>

Yes, use PythonInputFilter directive to specify an input filter.

  http://www.modpython.org/live/current/doc-html/dir-filter-if.html

Input filters which modify the length of the data may be an issue
though when doing proxying however.

If you cant work it out, possibly more appropriate to take your
questions to the official mod_python mailing list referenced on the
mod_python site.

Graham

On Sep 27, 9:26 pm, David S?nchez Mart?n <dsanc... at e2000.es> wrote:
> Hi!
>
>   I've seen the message below in this python list, that seems to be
> unanswered.
>
>   I'm trying to do the pretty same thing.
>
>   There's a way to preprocess the request with a mod_python handler and then
> proxying it with mod_proxy?
>
>   Thank you very much in advance, and sorry for trying to revive such an old
> message.
>
> Cheers.
>
>
>
>
>
> >whale whale at mycameo.com
> >Tue Mar 25 05:49:42 CET 2003
>
> >I use Apache2.0.44 and mod_python3.0.1.
> >I add ProxyPass and PythonHandler directives in httpd.conf
> >## httpd.conf
> >ProxyPass  /test/  http://www.test.com
> >ProxyPassReverse  /test/  http://www.test.com
> ><Location />
> >    AddHandler python-program .htm .html
> >    PythonHandler mptest
> ></Location>
>
> >And mptest.py:
> >from mod_python import apache
> >def handler(req):
> >    req.write('Hello!!')
> >    return apache.OK
>
> >ex. My apache server iswww.server.com.
> >When I browsed the local server request(ex.
> >http://www.server.com/1.html),
> >I received 'Hello!!' response, the python handler worked well.
> >But when I browse the proxy request(ex.
> >http://www.server.com/test/1.html),
> >the response I received is the original content of
> >http://www.test.com/1.html, not 'Hello!!'.
> >The proxy requests didn't seem to be processed by mod_python handler.
> >How could I pre-process the proxy request before mod_proxy module?
> >Thanks a lot!!
>
> ---
> David Sanchez Martin
> Administrador de Sistemas
> dsanc... at e2000.es
> GPG Key ID: 0x37E7AC1F
>
> E2000 Nuevas Tecnolog?as
> Tel : +34 902 19 61 77
>
>  David S?nchez Mart?n.vcf
> 1KDownload
>
>  smime.p7s
> 1KDownload




From arkanes at gmail.com  Thu Sep 27 16:40:16 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 27 Sep 2007 15:40:16 -0500
Subject: Cross-platform time out decorator
In-Reply-To: <87ejgjnarq.fsf@mulj.homelinux.net>
References: <1190802115.585306.250400@o80g2000hse.googlegroups.com>
	<1190899882.702911.44670@w3g2000hsg.googlegroups.com>
	<87k5qc18gf.fsf@mulj.homelinux.net>
	<1190907553.425261.273400@w3g2000hsg.googlegroups.com>
	<87ejgjnarq.fsf@mulj.homelinux.net>
Message-ID: <4866bea60709271340h5ab27afbk2cf11599a5369935@mail.gmail.com>

On 9/27/07, Hrvoje Niksic <hniksic at xemacs.org> wrote:
> Joel <joel.schaerer at gmail.com> writes:
>
> >> Note that, unlike the original alarm code, it doesn't really interrupt
> >> the timed-out method, it just returns the control back to the caller,
> >> using an exception to mark that a timeout occurred.  The "timed out"
> >> code is still merrily running in the background.  I don't know if it's
> >> a problem in your case, but it's an important drawback.
> >
> > There should be a method to stop the thread though?
>
> Not in Python.  Thread killing primitives differ between systems and
> are unsafe in general, so they're not exposed to the interpreter.  On
> Windows you can attempt to use ctypes to get to TerminateThread, but
> you'll need to hack at an uncomfortably low level and be prepared to
> deal with the consequences, such as memory leaks.  If the timeouts
> happen rarely and the code isn't under your control (so you have no
> recourse but to terminate the thread), it might be worth it though.
> --


You can use ctypes and the Python API to raise a Python exception in
the thread. I don't normally mention this, because it has some
limitations, but it results in essentially the same effect as the
signal based method. They both have the limitation that C code can't
be interrupted.


From wolf_tracks at invalid.com  Thu Sep 20 23:49:59 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Thu, 20 Sep 2007 20:49:59 -0700
Subject: Drawing a 640x480 Raw Image
In-Reply-To: <QRGIi.54592$YL5.52604@newssvr29.news.prodigy.net>
References: <QRGIi.54592$YL5.52604@newssvr29.news.prodigy.net>
Message-ID: <oaHIi.3304$4J3.1437@newssvr22.news.prodigy.net>

Corrected misspelling in Subject. The image here is nothing more than a 
640x480 byte array. Each byte is a gra[e]yscale value.

W. Watson wrote:
> I'm getting a 640x480 greyscale image from a video device. I'd like to 
> place it on a canvas and then draw on the image. Does PIL or some image 
> facility allow me to do that?
> 

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From fernandofariajunior at gmail.com  Mon Sep  3 19:11:49 2007
From: fernandofariajunior at gmail.com (fernando)
Date: Mon, 03 Sep 2007 23:11:49 -0000
Subject: Registering a python function in C
In-Reply-To: <1188592047.542946.249520@57g2000hsv.googlegroups.com>
References: <1188508874.879215.319400@i13g2000prf.googlegroups.com>
	<1188516423.744038.309700@z24g2000prh.googlegroups.com>
	<1188588784.764658.317570@r34g2000hsd.googlegroups.com>
	<1188592047.542946.249520@57g2000hsv.googlegroups.com>
Message-ID: <1188861109.041382.178950@d55g2000hsg.googlegroups.com>


> Is Maya a different python build than what is contained at python.org?
> If so, I suggest you get your C program to work with the latest python
> build
> from python.org.  Then see if you can get it to work with the Maya
> version.

Ok, did that. If I write a normal C++ program and use the python
installed in my system, everything works ok and I can call the python
funtions. From within maya(where the C code is running as a plugin),
nothing happens. I tried removing my python installation so that only
the one that comes with maya is running, but then I have no python.h
or libs to compile against!! I found no help at the maya/python
newsgroup, is there anyone who has done this before???


Thanks for all the help!




From jcd at sdf.lonestar.org  Sun Sep 16 08:44:47 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Sun, 16 Sep 2007 08:44:47 -0400
Subject: generate list of partially accumulated values
In-Reply-To: <Lg8Hi.112905$%k.258704@twister2.libero.it>
References: <1189936564.932553.148800@50g2000hsm.googlegroups.com>	<1189936979.276166.103080@w3g2000hsg.googlegroups.com>	<1189937183.100462.175070@o80g2000hse.googlegroups.com>	<1189938119.469599.171960@w3g2000hsg.googlegroups.com>
	<Lg8Hi.112905$%k.258704@twister2.libero.it>
Message-ID: <46ED253F.3090109@sdf.lonestar.org>

ZeD wrote:
> cesco wrote:
>
>   
>> The list is composed of objects:
>> l = [obj1, obj2, obj3, obj4]
>> and I need to call a method (say method1) on each object as follow:
>> l1 = [obj1.method1(obj2), obj2.method1(obj3), obj3.method1(obj4),
>> obj4]
>>     
>
> to me it sounds a bit different from the original request, but...
>
>   
That's because it's the next problem on his homework assignment.  See
also the thread entitled: "generating list of sub lists.

Cheers,
Cliff



From tokland at gmail.com  Sat Sep 29 09:38:43 2007
From: tokland at gmail.com (tokland at gmail.com)
Date: Sat, 29 Sep 2007 13:38:43 -0000
Subject: question about for cycle
In-Reply-To: <mailman.1275.1191060311.2658.python-list@python.org>
References: <mailman.1275.1191060311.2658.python-list@python.org>
Message-ID: <1191073123.459709.98870@g4g2000hsf.googlegroups.com>

On 29 sep, 12:04, "fdu.xia... at gmail.com" <fdu.xia... at gmail.com> wrote:

> for i in generator_a:  # the first "for" cycle
>      for j in generator_b:
>          if something_happen:
>              # do something here ..., I want the outer cycle to break
>              break

Do you like this?

generator_ab = ((x, y) for x in generator_a for y in generator_b)
for i, j in generator_ab:
    if condition:
        # do something
        break



From NikitaTheSpider at gmail.com  Thu Sep 13 11:38:56 2007
From: NikitaTheSpider at gmail.com (Nikita the Spider)
Date: Thu, 13 Sep 2007 11:38:56 -0400
Subject: Generating HTML
References: <mailman.427.1189571602.2658.python-list@python.org>
Message-ID: <NikitaTheSpider-D1E5E9.11385613092007@johnf2.biosci.ohio-state.edu>

In article <mailman.427.1189571602.2658.python-list at python.org>,
 "Sebastian Bassi" <sbassi at clubdelarazon.org> wrote:

> Hello,
> 
> What are people using these days to generate HTML? I still use
> HTMLgen, but I want to know if there are new options. I don't
> want/need a web-framework a la Zope, just want to produce valid HTML
> from Python.
> Best,
> SB.

Spyce. Works fine server side (like PHP) and also run from the command line.

http://spyce.sourceforge.net/

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


From erik at myemma.com  Sat Sep 15 12:26:23 2007
From: erik at myemma.com (Erik Jones)
Date: Sat, 15 Sep 2007 11:26:23 -0500
Subject: how to join array of integers?
In-Reply-To: <13eo0pbiab4spdf@corp.supernews.com>
References: <1189859762.563599.269270@g4g2000hsf.googlegroups.com>
	<a23effaf0709150551g19c611eqe1c912acf02306d3@mail.gmail.com>
	<mailman.577.1189864628.2658.python-list@python.org>
	<13eo0pbiab4spdf@corp.supernews.com>
Message-ID: <2EE95E6A-D6D0-4742-844E-4F18265DC469@myemma.com>

On Sep 15, 2007, at 11:07 AM, Grant Edwards wrote:

> On 2007-09-15, Arnau Sanchez <arnau at ehas.org> wrote:
>
>>>> in Python... is the method to use ",".join() ?  but then it
>>>> must take a list of strings... not integers...
>>>>
>>>> any fast method?
>>
>>> print ''.join([str(i) for i in [1,2,3]])
>>
>> It's better to use generator comprehension instead of LC:
>>
>> ",".join(str(i) for i in [1, 2, 3])
>>
>> Or, if you happen to like the itertools modules:
>>
>> from itertools import imap
>> ",".join(imap(str, [1, 2, 3]))
>
> It's nice people have invented so many ways to spell the
> builting "map" ;)
>
>>>> ",".join(map(str,[1,2,3]))
> '1,2,3'

IIRC, map's status as a builtin is going away.

Erik Jones

Software Developer | Emma?
erik at myemma.com
800.595.4401 or 615.292.5888
615.292.0777 (fax)

Emma helps organizations everywhere communicate & market in style.
Visit us online at http://www.myemma.com




From jstroud at mbi.ucla.edu  Thu Sep 13 22:21:08 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 13 Sep 2007 19:21:08 -0700
Subject: An ordered dictionary for the Python library?
In-Reply-To: <1189733785.813953.77370@k79g2000hse.googlegroups.com>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<7xzlzrtrjn.fsf@ruckus.brouhaha.com>
	<1189664832.876539.86800@k79g2000hse.googlegroups.com>
	<fcc5lt$ish$1@daisy.noc.ucla.edu>
	<1189733785.813953.77370@k79g2000hse.googlegroups.com>
Message-ID: <fccqq4$34d$1@daisy.noc.ucla.edu>

Carl Banks wrote:
> On Sep 13, 4:20 pm, James Stroud <jstr... at mbi.ucla.edu> wrote:
>> Mark Summerfield wrote:
>>> - If an item is inserted it is put in the right place (because the
>>> underlying data structure, b*tree, skiplist or whatever is
>>> intrinsically ordered by < on the key)
>> +1 for all your suggestions below, but -1 for the above. You suggest that
>>
>>    myOrderedDict['key'] = value
>>
>> would place it in the dictionary in sorted order depending on 'key'.
>> More natural to some of us (or maybe its just me) would be to append the
>> key/value pair to the end of items.
> 
> Or, maybe, like, you know, you could have two different types that
> maintain two different orders?
> 

Do you mean, like, a SortedDict and an OrderedDict like I mentioned in 
the post you are replying to?


From grante at visi.com  Mon Sep 10 15:34:21 2007
From: grante at visi.com (Grant Edwards)
Date: Mon, 10 Sep 2007 19:34:21 -0000
Subject: How do I disable warnings?
Message-ID: <13eb71tjns922f9@corp.supernews.com>

I've read the documentation for the warnings module, but I'm
still unable to figure out how to disable a warning.

I'd like to disable this warning:

 Warning: 'with' will become a reserved keyword in Python 2.6

AFAICT, the following should work.  But, it doesn't.

  import warnings
  warnings.filterwarnings('ignore',".*'with' will become a reserved keyword.*")

What am I doing wrong?

-- 
Grant Edwards                   grante             Yow! And then we could sit
                                  at               on the hoods of cars at
                               visi.com            stop lights!


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Sep  5 09:30:10 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 05 Sep 2007 15:30:10 +0200
Subject: Accessing Module variables from another Module
In-Reply-To: <1188996919.321965.262830@k79g2000hse.googlegroups.com>
References: <1188981521.735630.133060@r29g2000hsg.googlegroups.com>
	<46de9f7f$0$30604$426a34cc@news.free.fr>
	<1188996919.321965.262830@k79g2000hse.googlegroups.com>
Message-ID: <46deaf5d$0$6133$426a74cc@news.free.fr>

cjt22 at bath.ac.uk a ?crit :
> On Sep 5, 1:22 pm, Bruno Desthuilliers <bruno.
> 42.desthuilli... at wtf.websiteburo.oops.com> wrote:
>> cj... at bath.ac.uk a ?crit :
>>
>>> Hi
>>> I am new to Python (I have come from a large background of Java) and
>>> wondered if someone could explain to me how I can access variables
>>> stored in my main module to other functions within other modules
>>> called
>>> from this module
>> (snip code)
>>> I am currently just passing the variable in as a parameter
>> And this is the RightThing(tm) to do.
>>
>>> but I thought with Python there would be a way to gain direct access
>>> to
>>> storeList within the modules called from the top main module?
>> Yes : passing it as a param !-)
>>
>> For other modules to get direct access to main.storeList, you'd need
>> these modules to import main in these other modules, which would
>> introduce circular dependencies, which are something you usuallay don't
>> want. 

(NB : the canonical solution to circular dependencies is to move the 
relevent definitions to a third module.)

> Also, and while it's ok to read imported modules attributes, it's
>> certainly not a good idea to mutate or rebind them IMHO, unless you're
>> ok with spaghetti code.
> 
> Cheers Bruno, I just wanted to make sure I was being consistent with
> the "Python way of things" :)

Then fire up your python shell and type 'import this' !-)



From zentraders at gmail.com  Fri Sep 14 11:00:46 2007
From: zentraders at gmail.com (Zentrader)
Date: Fri, 14 Sep 2007 08:00:46 -0700
Subject: subclass of integers
In-Reply-To: <1189780201.692192.291010@k79g2000hse.googlegroups.com>
References: <1189780201.692192.291010@k79g2000hse.googlegroups.com>
Message-ID: <1189782046.121148.65220@22g2000hsm.googlegroups.com>

This would accept ints, floats, and decimal types.

import decimal

class Nint(int):
    def __add__(self, x, y):
        try:
            return x+y
        except:
            return None

if __name__=='__main__':
    N=Nint()
    print N.__add__( 1, 2 )
    print N.__add__( 1, None )
    print N.__add__(decimal.Decimal("2"), decimal.Decimal("3"))
    print N.__add__(decimal.Decimal("2"), 3)



From rjagodic at gmail.com  Mon Sep 24 15:17:48 2007
From: rjagodic at gmail.com (Ratko)
Date: Mon, 24 Sep 2007 19:17:48 -0000
Subject: Can a base class know if a method has been overridden?
In-Reply-To: <mailman.1003.1190656592.2658.python-list@python.org>
References: <1190647436.423328.217670@w3g2000hsg.googlegroups.com>
	<46f7d897$0$25150$426a74cc@news.free.fr>
	<1190648887.051630.168520@r29g2000hsg.googlegroups.com>
	<46f7e8df$0$21052$426a74cc@news.free.fr>
	<mailman.1003.1190656592.2658.python-list@python.org>
Message-ID: <1190661468.851812.60970@50g2000hsm.googlegroups.com>

On Sep 24, 12:56 pm, St?phane Larouche <stephane.larou... at polymtl.ca>
wrote:
> What about something like:
>
> class A(object):
>         def my_method(self):
>                 print "A.my_method"
>         def call_my_method(self):
>                 if type(self).my_method == A.my_method:
>                         print "Calling base class method."
>                 else:
>                         print "Calling derived class method."
>                 self.my_method()
>
> class B(A):
>         pass
>
> class C(A):
>         def my_method(self):
>                 print "C.my_method"
>
> a = A()
> b = B()
> c = C()
>
> a.call_my_method()
> b.call_my_method()
> c.call_my_method()
>
> St?phane


I think it would confuse the user to have to call "call_my_method" as
opposed to calling "my_method" directly. The only reason why I wanted
to do this is simplicity, clarity and transparency. Thanks though.
Bruno's solution does exactly what I was looking for.

Ratko



From pavlovevidence at gmail.com  Tue Sep 18 06:22:00 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Tue, 18 Sep 2007 06:22:00 -0400
Subject: super() doesn't get superclass
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87vea8zg61.fsf@benfinney.id.au>
Message-ID: <46efb3c7$0$16468$4c368faf@roadrunner.com>

On Tue, 18 Sep 2007 15:38:46 +1000, Ben Finney wrote:
> Evan Klitzke <evan at yelp.com> writes:
> 
>> If you're using multiple inheritance, and you're _not_ using super
>> everywhere, then your code is broken anyway.
> 
> This seems to support the notion that 'super' is unusable. If I inherit
> from code that isn't under my control, and then use super(), my code is
> broken.
> 
> Therefore, to avoid writing broken code, I must either never inherit
> from code not under my control, or I must never use super(). Since the
> former is practically unavoidable, I must choose the latter.
> 
> Which, naturally, compounds the problem, since when someone else uses
> *my* code, they in turn must conclude that they can't use super().

I'm sorry, but you can't inherit from someone else's classes and not 
worry about what they're doing.  Whether they use super or not is only 
one possible concern.  It's not like the super destroyed the magical 
utopia where you could derive from other people's classes without worry.

In any case, it's just as problematic if you don't use super and your 
base classes do.  By your logic, your code is "broken" no matter what you 
do, and so the only "conclusion" you can come to is never to derive from 
classes that aren't under your control.

(Which, frankly, isn't all that bad a conclusion.  In 8 years of Python 
programming, I've inherited from exactly one class that wasn't under my 
control: Thread.  It's not "practically impossible" to avoid, at least 
not for me.)


>> Use super correctly in your own code, and you don't need to worry about
>> other people using it incorrectly.
> 
> As the article points out, when using super(),
> 
>     you must remember that super does not call your superclass. You must
>     be prepared to call any other class's method in the hierarchy and be
>     prepared to be called from any other class's method.
> 
> So, the programmer using super() very much *does* need to worry about
> other people using it correctly.

Yes.  Welcome to programming.


Carl Banks


From deets at nospam.web.de  Sun Sep  2 17:12:17 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 02 Sep 2007 23:12:17 +0200
Subject: howto reload Python module?
In-Reply-To: <1188764906.354022.86370@50g2000hsm.googlegroups.com>
References: <1188764906.354022.86370@50g2000hsm.googlegroups.com>
Message-ID: <5k0n9qF1jemiU1@mid.uni-berlin.de>

dmitrey schrieb:
> my Python module was changed in HDD (hardware disk drive), moreover,
> changed its location (but still present in sys.path).
> how can I reload a func "myfunc"  from the module? (or howto reload
> whole module)?
> Thank you in advance, D.

By using *drumroll* the reload function!

diez


From duncan.booth at invalid.invalid  Tue Sep  4 09:06:38 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 4 Sep 2007 13:06:38 GMT
Subject: Printing lists in columns (was: TypeError: 'module object is not
	callable')
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<mailman.315.1188810174.28954.python-list@python.org>
	<46dbd11e$0$6228$426a74cc@news.free.fr>
	<mailman.317.1188812089.28954.python-list@python.org>
	<1188816626.021956.281040@22g2000hsm.googlegroups.com>
	<5k2cjmF1r2aiU1@mid.uni-berlin.de>
	<1188836008.656284.76160@o80g2000hse.googlegroups.com>
	<46dc6f49$0$6207$426a34cc@news.free.fr>
	<1188900397.459760.259580@k79g2000hse.googlegroups.com>
	<slrnfdqe3t.i4p.hat@se-162.se.wtb.tue.nl>
	<Xns99A17FAC2587duncanbooth@127.0.0.1>
	<1188906767.737741.267350@19g2000hsx.googlegroups.com>
Message-ID: <Xns99A18F8C528BCduncanbooth@127.0.0.1>

cjt22 at bath.ac.uk wrote:

>> But watch out if the lists aren't all the same length: zip won't pad out
>> any sequences, so it maynotbe exactly what is wanted here:
>>
>> >>> x = ['1', '2', '3']
>> >>> y = ['4', '5']
>> >>> for row in zip(x,y):
>>
>>         print ', '.join(row)
>>
>> 1, 4
>> 2, 5
>>
> 
> Unfortunately the lists will be of different sizes

In that case use:

from itertools import repeat, chain, izip
def izip_longest(*args, **kwds):
    fillvalue = kwds.get('fillvalue')
    def sentinel(counter = ([fillvalue]*(len(args)-1)).pop):
        yield counter()         # yields the fillvalue, or raises IndexError
    fillers = repeat(fillvalue)
    iters = [chain(it, sentinel(), fillers) for it in args]
    try:
        for tup in izip(*iters):
            yield tup
    except IndexError:
        pass

        
x = ['1', '2', '3']
y = ['4', '5']
for row in izip_longest(x,y, fillvalue='*'):
    print ', '.join(row)


which gives:
	
1, 4
2, 5
3, *


(izip_longest is in a future version of itertools, but for 
now you have to define it yourself).



From arkanes at gmail.com  Thu Sep 20 08:56:22 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 20 Sep 2007 07:56:22 -0500
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
In-Reply-To: <1190263363.496695.83300@57g2000hsv.googlegroups.com>
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<fcq352$u0a$1@sea.gmane.org>
	<mailman.786.1190246955.2658.python-list@python.org>
	<1190263363.496695.83300@57g2000hsv.googlegroups.com>
Message-ID: <4866bea60709200556s4056f82fga35ee0de581fae3a@mail.gmail.com>

On 9/19/07, TheFlyingDutchman <zzbbaadd at aol.com> wrote:
> On Sep 19, 5:08 pm, "Terry Reedy" <tjre... at udel.edu> wrote:
> > "Terry Reedy" <tjre... at udel.edu> wrote in message
>
> This is a little confusing because google groups does not show your
> original post (not uncommon for them to lose a post in a thread - but
> somehow still reflect the fact that it exists in the total-posts
> number that they display) that you are replying to.
>
>
> >
> > This assumes that comparing versions of 1.5 is still relevant.  As far as I
> > know, his patch has not been maintained to apply against current Python.
> > This tells me that no one to date really wants to dump the GIL at the cost
> > of half Python's speed.  Of course not.  The point of dumping the GIL is to
> > use multiprocessors to get more speed!  So with two cores and extra
> > overhead, Stein-patched 1.5 would not even break even.
> >
> > Quad (and more) cores are a different matter.  Hence, I think, the
> > resurgence of interest.
>
> I am confused about the benefits/disadvantages of the "GIL removal".
> Is it correct that the GIL is preventing CPython from having threads?
>

No. Python has threads, and they're wrappers around true OS level
system threads. What the GIL does is prevent *Python* code in those
threads from running concurrently.

> Is it correct that the only issue with the GIL is the prevention of
> being able to do multi-threading?
>

This sentence doesn't parse in a way that makes sense.

> If you only planned on writing single-threaded applications would GIL-
> removal have no benefit?
>

Yes.

> Can threading have a performance benefit on a single-core machine
> versus  running multiple processes?
>

A simple question with a complicated answer. With the qualifier "can",
I have to say yes to be honest although you will only see absolute
performance increases on a single core from special purposed APIs that
call into C code anyway - and the GIL doesn't effect those so GIL
removal won't have an effect on the scalability of those operations.

Pure CPU bound threads (all pure Python code) will not increase
performance on a single core (there's CPU level concurrency that can,
but not OS level threads). You can improve *perceived* performance
this way (latency at the expense of throughput), but not raw
performance.

Very, very few operations are CPU bound these days, and even fewer of
the ones were Python is involved. The largest benefits to the desktop
user of multiple cores are the increase in cross-process performance
(multitasking), not single applications.

Servers vary more widely. However, in general, there's not a huge
benefit to faster threading when you can use multiple processes
instead. Python is not especially fast in terms of pure CPU time, so
if you're CPU bound anyway moving your CPU bound code into C (or
something else) is likely to reap far more benefits - and sidestepping
the GIL in the process.

In short, I think any problem that would be directly addressed by
removing the GIL is better addressed by other solutions.

> > So now this question for you:  "CPython 2.5 runs too slow in 2007: true or
> > false?"
>
> I guess I gotta go with Steven D'Aprano - both true and false
> depending on your situation.
>
> > If you answer false, then there is no need for GIL removal.
>
> OK, I see that.
>
> > If you answer true, then cutting its speed for 90+% of people is bad.
>
> OK, seems reasonable, assuming that multi-threading cannot be
> implemented without a performance hit on single-threaded applications.
> Is that a computer science maxim - giving an interpreted language
> multi-threading will always negatively impact the performance of
> single-threaded applications?
>

It's not a maxim, per se - it's possible to have lockless concurrency,
although when you do this it's more like the shared nothing process
approach - but in general, yes. The cost of threading is the cost of
the locking needed to ensure safety, and the amount of locking is
proportional to the amount of shared state. Most of the common uses of
threading in the real world do not improve absolute performance and
won't no matter how many cores you use.

> >
> > | Most people are not currently bothered by the GIL and would not want its
> > | speed halved.
> >
> > And another question: why should such people spend time they do not have to
> > make Python worse for themselves?
> >
> Saying they don't have time to make a change, any change, is always
> valid in my book. I cannot argue against that. Ditto for them saying
> they don't want to make a change with no explanation. But it seems if
> they make statements about why a change is not good, then it is fair
> to make a counter-argument. I do agree with the theme of Steven
> D'Aprano's comments in that it should be a cordial counter-argument
> and not a demand.
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From zzbbaadd at aol.com  Mon Sep 10 08:37:48 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Mon, 10 Sep 2007 05:37:48 -0700
Subject: Python syntax wart
In-Reply-To: <5kkp28F46jjuU2@mid.individual.net>
References: <fbvvil$7dj$1@lust.ihug.co.nz>
	<1189405211.875217.176620@57g2000hsv.googlegroups.com>
	<5kkp28F46jjuU2@mid.individual.net>
Message-ID: <1189427868.658784.168830@19g2000hsx.googlegroups.com>

On Sep 10, 4:45 am, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:
> TheFlyingDutchman wrote:
> > It may be that a language that doesn't have a statement terminator
> > (which can be end-of-line) needs a statement continuation symbol.
>
> Which language could that be? I can hardly imagine making a complex
> program out of one statement.
>
> Regards,
>
> Bj?rn
>
> --
> BOFH excuse #147:
>
> Party-bug in the Aloha protocol.

Funny how I mentioned end-of-line but didn't include Python as one
those languages that used it.
I should have said "It may be that a language that doesn't have a
statement terminator
symbol, but instead uses end-of-line, can't avoid a statement
continuation symbol.



From steve at REMOVE-THIS-cybersource.com.au  Sun Sep  9 04:58:21 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sun, 09 Sep 2007 08:58:21 -0000
Subject: Python syntax wart
References: <fbvvil$7dj$1@lust.ihug.co.nz>
Message-ID: <13e7ddd9hgibae6@corp.supernews.com>

On Sun, 09 Sep 2007 17:16:05 +1200, Lawrence D'Oliveiro wrote:

> The one thing I don't like about Python syntax is using backslashes to
> continue lines.

Then don't use them. Put everything in one long line.

Or do something like this. Instead of

for Link in GetEachRecord("lots", "and", "lots", "of", "arguments"):

you can do this:

args = ("lots", "and", "lots", "of", "arguments")
for Link in GetEachRecord(*args):



> Not possible:
> 
>     for \
>         Link \
>     in \
>         GetEachRecord \
>           (
>             "links",
>             ("from_episode",),
>             "to_episode = %s",
>             [EpisodeID],
>             "order by when_created"
>           ) \
>     :
>         out.write \
>           (
>                 "<P><A HREF=\"%s\">Back to episode %d</A>\n"
>             %
>                 (
>                     LinkToMe({"ep" : Link["from_episode"]}),
>                     Link["from_episode"]
>                 )
>           )
>     #end for


That is quite possibly the ugliest piece of code I've ever seen in 
Python. I'm impressed. Did you format it yourself or did you use a 
professionally written code-uglifier?

Or perhaps I should say:

That
    is
    quite possibly
        the
        ugliest piece
        of code
            I
            '
            ve
        ever seen
    in
        Python
    .
    # end sentence

But have you actually tried it before declaring it isn't possible? After 
writing a couple of short stub functions, then copy-and-pasting your 
code, it worked perfectly for me.

For the record, here are the stubs I used:

class Stub(object):
    def write(self, *args):
        print "Stub called"

def GetEachRecord(*args):
    return [{"from_episode": i} for i in range(5)]

def LinkToMe(*args):
    return "stub"

out = Stub()
EpisodeID = 1234

Now copy the "Not possible" code from Lawrence's original post. Make sure 
you adjust the indentation of the first line, i.e. there should be no 
white space before the "for". Paste the whole lot into your Python 
interpreter, and you should get "Stub called" printed five times.



-- 
Steven.


From mulkiatsch at gmail.com  Sun Sep 30 12:38:45 2007
From: mulkiatsch at gmail.com (Matthias Benkard)
Date: Sun, 30 Sep 2007 09:38:45 -0700
Subject: The Modernization of Emacs: terminology buffer and keybinding
In-Reply-To: <pmnLi.1684$hP.1048@newsfe12.lga>
References: <1182093200.598418.218620@e9g2000prf.googlegroups.com>
	<1182272495.990807.99110@a26g2000pre.googlegroups.com>
	<87tzt3ihev.fsf@kobe.laptop> <m31wg6lre9.fsf@borud.not>
	<1182370216.961241.6960@n60g2000hse.googlegroups.com>
	<85zm2ufjpb.fsf@lola.goethe.zz>
	<1182372592.803332.288260@u2g2000hsc.googlegroups.com>
	<m3myyt47nq.fsf@latakia.dyndns.org>
	<1182549094.366282.286740@m37g2000prh.googlegroups.com>
	<87bqf7fwmg.fsf@telesippa.clsnet.nl>
	<1182553682.197778.138500@g37g2000prf.googlegroups.com>
	<873b0fhokz.fsf@kobe.laptop> <13frd6vtarbee75@corp.supernews.com>
	<pmnLi.1684$hP.1048@newsfe12.lga>
Message-ID: <1191170325.947900.177850@50g2000hsm.googlegroups.com>

> So this has nothing to
> do with freedom in /any/ sense of the word, it has to do with a
> political agenda opposed to the idea of private property.

Freedom is inherently political, you know.  You're condemning the FSF
for being political, although the FSF's stated purpose is a political
one.  How does that make any sense?

~ Matthias



From apardon at forel.vub.ac.be  Mon Sep  3 09:43:20 2007
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 3 Sep 2007 13:43:20 GMT
Subject: How can I wait for all the threads I spawn for 5 minutes
References: <1188603646.671414.272760@w3g2000hsg.googlegroups.com>
Message-ID: <slrnfdo3ro.inr.apardon@rcpc42.vub.ac.be>

On 2007-08-31, herman <Herman.Schultz at gmail.com> wrote:
> Hi,
>
> In my python program, I would to like to spwan 5 threads, for the them
> for 5 minutes maximum and the continue. Here is my script:
>
>             threads = []
>
>             for j in range(5):
>                 t = MyThread()
>                 threads.append(t)
>
>             for t in threads:
>                 t.join(60*5)
>                 print "thread join\n"
>
>             # wait for 5 minutes for all the threads to complete ,
> and
>             # then continue
>
> But this code ends up waiting 5 minutes for **each** thread.  that is
> not what I want. I just want to wait for 5 minutes for all threads.
> how can I do that?
>
> And after 5 minutes, i want to kill off all the threads I spawn
> earlier, how can I do that in python.

You may wish to look at this. No guarantee though.

  http://groups.google.com/group/comp.lang.python/browse_thread/thread/2002d29c965534cc/5833130893cee567?lnk=st&q=&rnum=2&hl=nl#5833130893cee567


From earnclick at gmail.com  Sat Sep 15 04:17:26 2007
From: earnclick at gmail.com (earnclick at gmail.com)
Date: Sat, 15 Sep 2007 01:17:26 -0700
Subject: Make money to share your videos
Message-ID: <1189844246.297204.249090@o80g2000hse.googlegroups.com>


Goodtolove.com is sharing their 50% adsense revenue with you to post
videos of anything.
Just keep up logging in and start posting now to make money...



From ldo at geek-central.gen.new_zealand  Sun Sep  9 23:05:30 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 10 Sep 2007 15:05:30 +1200
Subject: Symbolic Link
References: <1187475296.173269.263080@k79g2000hse.googlegroups.com>
	<iwWxi.28394$RX.20505@newssvr11.news.prodigy.net>
	<1187555373.202634.163160@57g2000hsv.googlegroups.com>
	<1187646982.760523.195750@i38g2000prf.googlegroups.com>
	<mailman.87.1187737527.32294.python-list@python.org>
	<1187879000.370831.118780@j4g2000prf.googlegroups.com>
	<1o1Fi.33230$RX.26068@newssvr11.news.prodigy.net>
Message-ID: <fc2c9q$i1l$5@lust.ihug.co.nz>

In message <1o1Fi.33230$RX.26068 at newssvr11.news.prodigy.net>, samwyse wrote:

> A hard-link, OTOH, allows
> direct access to the contents of a file, as long as it is on the same
> filesystem.  No extra steps are required, so the process runs a few
> microseconds faster, and directory-level permissions can't get in the way.

Hard links are best avoided, because of the confusion they can cause.


From tgrav at mac.com  Sat Sep  8 20:48:06 2007
From: tgrav at mac.com (Tommy Grav)
Date: Sat, 8 Sep 2007 20:48:06 -0400
Subject: Organizing Code - Packages
In-Reply-To: <1189296296.175857.158770@22g2000hsm.googlegroups.com>
References: <1189177596.960379.244990@w3g2000hsg.googlegroups.com>
	<46e17143$0$6189$426a74cc@news.free.fr>
	<1189183088.922537.18290@r34g2000hsd.googlegroups.com>
	<87r6laa0ir.fsf@rudin.co.uk>
	<46e1a0bc$0$7689$9b4e6d93@newsspool2.arcor-online.net>
	<1189280539.449868.169910@22g2000hsm.googlegroups.com>
	<mailman.281.1189283755.2658.python-list@python.org>
	<1189296296.175857.158770@22g2000hsm.googlegroups.com>
Message-ID: <5E1563B7-9C9B-4FAE-BBA6-4C1960EC7656@mac.com>


On Sep 8, 2007, at 8:04 PM, xkenneth wrote:
>
> Code doesn't compile in python. This is pseudo code anyways.
> Can't post actual code and tracebacks because the code is proprietary.
> "MyModule" is pseudo code, and i forgot the arguments, the actual code
> and errors are unimportant for this question.

The code and traceback is important because the behavior you claim
is not easily explained without more information. How are we suppose  
to help
you make your code run, when you can't even properly explain the  
problem?

Cheers
   Tommy


From michele.simionato at gmail.com  Wed Sep 19 01:13:12 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Tue, 18 Sep 2007 22:13:12 -0700
Subject: super() doesn't get superclass
In-Reply-To: <8764281uea.fsf@benfinney.id.au>
References: <8764281uea.fsf@benfinney.id.au>
Message-ID: <1190178792.662623.164840@o80g2000hse.googlegroups.com>

On Sep 18, 12:15 am, Ben Finney <b... at benfinney.id.au> wrote:
> Howdy all,
>
> After banging my head against super() trying to reliably get
> attributes of a superclass, I gained a little enlightenment when this
> turned up in a search:
>
>     "Python's Super is nifty, but you can't use it
>     (Previously: Python's Super Considered Harmful)"
>     <URL:http://fuhm.org/super-harmful/>
>
> An early paragraph stood out that made my current problems clear:
>
>     One big problem with 'super' is that it sounds like it will cause
>     the superclass's copy of the method to be called. This is simply
>     not the case, it causes the next method in the MRO to be called.
>
> Oh. The author's right, I got that mistaken impression too. Obviously,
> then, I must have misread the documentation of 'super'. I went back to
> double-check, and was appalled to find:
>
>     super(type[, object-or-type])
>     Return the superclass of type. [...]
>
>     <URL:http://docs.python.org/lib/built-in-funcs.html#l2h-72>
>
> Why does the documentation of 'super' say that it returns the
> superclass when *that's not true*? It doesn't return the superclass,
> it returns the next class in the MRO, whether that's a superclass or
> not.
>
> Actually, even that's not true. The error message "AttributeError:
> 'super' object has no attribute 'bazfunc'" makes it clear that 'super'
> actually returns not the superclass, but a 'super' object, whatever
> that's supposed to be.
>
> After reading the rest of the article, I'm amazed that 'super' as
> currently implemented is in Python at all. I agree with the author
> that it's useless unless *everyone* uses it for *everything*, and even
> then it's pretty limited.
>
> One thing's for sure, it's badly misnamed, and falsely documented.

You are right, I think I even filed a documentation bug for
that years ago, and I wrote an entire paper on the subject that
however I never published since I never felt 100% confident
with super (and I had other fishes to fry ;)
I realize now that I was wrong in not publishing it.
You can find the draft (warning: it is a draft, I did
not check the examples there, they are likely broken)
here:

http://www.phyast.pitt.edu/~micheles/python/super.html

It begins as follows:

"""
The truth about super
Author: 	Michele Simionato
Date: 	June 2004
Status: 	Draft

super is a new built-in, first introduced in Python 2.2 and slightly
improved and fixed in Python 2.3, which is little known to the average
Python programmer. One of the reason for this fact is its poor
documentation`: at the time of this writing (June 2004) super
documentation is incomplete and in some parts misleading and even
wrong. For instance, it was recently pointed out on comp.lang.python
that the standard library (Python 2.3.4, section 2.1) still says:

super(type[, object-or-type])
  Return the superclass of type. If the second argument is omitted
the
  super object returned is unbound. If the second argument is an
object,
  isinstance(obj, type) must be true. If the second argument is a
type,
  issubclass(type2, type) must be true. super() only works for new-
style
  classes.

The first sentence is just plain wrong. super does not return the
superclass. There is no such a thing as "the" superclass in a Multiple
Inheritance (MI) language. Also, the sentence about 'unbound' is
misleading, since it may easily lead the programmer to think about
bound and unbound methods, whereas it has nothing to do with that
concept. Finally, there subtle pitfalls of super which are not at all
mentioned. IMNSHO super is one of the most trickiest and surprising
Python constructs, so it absolutely needs a document to share light on
some of his secrets: the present article aims to fix the issues with
the current documentation, and tell you the "truth" about super. At
least the amount of truth I have discovered with my experimentations,
which is certainly not the whole truth ;)

Here is the plan: first I will discuss the concept of superclass in a
Multiple Inheritance (MI) world (there is no such a thing as "the"
superclass!); second, I will show that super is a proxy object, able
to dispatch to the right methods/attributes in the MRO; third,

recall some background on how the resolution of methods works on how
descriptors work and (essentially pointing out to the standard
references); then I will discuss the more common invocation of super -
the invocation with two arguments - and finally I will discuss the
most tricky part, i.e. invoking super with just one argument and I
will discuss pitfalls.

Finally, a fair warning: this document is aimed to expert Pythonistas.
It is not for the faint of heart ;)
"""



From evan at yelp.com  Wed Sep 12 13:16:38 2007
From: evan at yelp.com (Evan Klitzke)
Date: Wed, 12 Sep 2007 10:16:38 -0700
Subject: Generating HTML
In-Reply-To: <46e79b40$0$28082$426a74cc@news.free.fr>
References: <9e2f512b0709112133l41ce5ef1g815962a81becf6b9@mail.gmail.com>
	<mailman.429.1189582623.2658.python-list@python.org>
	<46e79b40$0$28082$426a74cc@news.free.fr>
Message-ID: <1189617398.5630.0.camel@thinkpad>

On Wed, 2007-09-12 at 09:54 +0200, Bruno Desthuilliers wrote:
> Evan Klitzke a ?crit :
> > It's not applicable for everything, but if you're planning on using
> > Python to generate web pages you should really be using Cheetah
> > templates. Very simple to use template system that is also very
> > powerful, and you don't need to use it in conjunction with a heavy web
> > application framework. See http://www.cheetahtemplate.org/
> > 
> 
> Same for Mako (http://www.makotemplates.org), which has IMHO a much 
> nicer syntax (Cheetah looks too much like line noise IMHO).

Can you compile Mako templates? This is one thing that I really like
about Cheetah, and it wasn't clear to me from the Mako site if this is
possible.

-- 
Evan Klitzke <evan at yelp.com>



From BjornSteinarFjeldPettersen at gmail.com  Sat Sep 29 13:58:11 2007
From: BjornSteinarFjeldPettersen at gmail.com (thebjorn)
Date: Sat, 29 Sep 2007 10:58:11 -0700
Subject: sorteddict [was a PEP proposal, but isn't anymore!]
In-Reply-To: <Xns99BAAF2FE1D9Eduncanbooth@127.0.0.1>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190829592.800804.242260@50g2000hsm.googlegroups.com>
	<1190881576.186259.313720@57g2000hsv.googlegroups.com>
	<1190897445.179828.291720@y42g2000hsy.googlegroups.com>
	<slrnffslvp.40p.apardon@rcpc42.vub.ac.be>
	<Xns99BA9C6861A3Eduncanbooth@127.0.0.1>
	<1191078696.664214.152350@50g2000hsm.googlegroups.com>
	<Xns99BAAF2FE1D9Eduncanbooth@127.0.0.1>
Message-ID: <1191088691.380960.151260@d55g2000hsg.googlegroups.com>

On Sep 29, 7:13 pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
[...]
> Right now I think there are probably three dict variants needed: sorteddict
> (still waiting for a convincing use case), ordereddict (lots of use cases),
> and this one: stabledict.

What's stabledict? I'm assuming that ordereddict is a mapping that
maintains insertion order(?)

The only other mapping type I use very frequently is a dict where the
keys are limited to valid identifiers, and where attribute lookup
(d.foo) is defined as key lookup (d['foo']). It makes lots of code
easier to read (and write).

In the Smalltalk collection hierarchy SortedCollection is a subclass
of OrderedCollection, which implies to me that it'd be better to add
an ordereddict first.

-- bjorn



From steve at holdenweb.com  Tue Sep 11 18:02:54 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 11 Sep 2007 18:02:54 -0400
Subject: Python Database Apps
In-Reply-To: <xqx8x7duzrn.fsf@cola3.ca.boeing.com>
References: <1189479130.905136.196820@r34g2000hsd.googlegroups.com>	<mailman.403.1189541226.2658.python-list@python.org>
	<xqx8x7duzrn.fsf@cola3.ca.boeing.com>
Message-ID: <fc73ac$dns$1@sea.gmane.org>

Harry George wrote:
> Tom Brown <brown at esteem.com> writes:
> 
>> On Monday 10 September 2007 19:52, darien.watkins at gmail.com wrote:
>>> Kindof a poll, kindof curiosity...
>>>
>>> What is your favorite python - database combination?  I'm looking to
>>> make an app that has a local DB and a server side DB.  I'm looking at
>>> python and sqlite local side and sql server side.
>>>
>>> Any suggestions????
>> I have had a lot of good luck with PostgreSQL. It is easy to install and use. 
>> It is also very stable. It maybe overkill for a client side database. The 
>> psycopg package makes interfacing to PostgreSQL very easy and there is a 
>> package for Linux and Windows to make cross-platform development a breeze.
>>
>> -Tom
> 
> I use postgresql as well.  I wonder if Pythonistas do so out of
> concern for rigor, clarity, and scalability.  It works fine for a
> quick one-off effort and still works fine after scaling to a DBMS
> server supporting lots of clients, and running 10's of GBs of data.
> 
> If an app comes already designed for mysql, oracle, sqlite, db2, dbm,
> etc I'll use those.  But for my own projects, it is postgresql, with
> maybe SQLAlchemy (I'm back and forth on that.  Mostly stay with
> straight SQL).
> 
> Of course, as long as you write DBI2 compliant code, your app doesn't
> much care which DBMS you use.  The postgresql payoff is in admin
> functionality and scaling and full ACID.
> 
I also have a tendency to prefer PostgreSQL over MySQL, though I run and 
use both from time to time as an exercise in application portability.

Don't forget, there is absolutely no need to use the same database 
technology for the client-side and the central repository - sqlite is 
hard to beat for its simplicity and ease of installations on the client 
side, and you could look at PostgreSQL for the repository as and when 
that became a practical proposition.

regards
  Steve

-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From aleax at mac.com  Sat Sep  8 22:26:50 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 8 Sep 2007 19:26:50 -0700
Subject: Class design (information hiding)
References: <fbr2gg$ipg$1@online.de>
	<42d6c$46e138d3$547078de$10495@news.chello.at>
Message-ID: <1i44z4p.fbrtvc1qvlmitN%aleax@mac.com>

Gregor Horvath <gh at gregor-horvath.com> wrote:

> Alexander Eisenhuth schrieb:
> > 
> > I'm wodering how the information hiding in python is ment. As I 
> > understand there  doesn't exist public / protected / private  mechanism,
> > but a '_' and '__' naming convention.
> > 
> > As I figured out there is only public and private possible as speakin in
> > "C++ manner". Are you all happy with it. What does "the zen of python"
> > say to that design? (protected is useless?)
> 
> My favourite thread to this FAQ:
> 
>
> http://groups.google.at/group/comp.lang.python/browse_thread/thread/2c85
> d6412d9e99a4/b977ed1312e10b21#b977ed1312e10b21

Why, thanks for the pointer -- I'm particularly proud of having written
"""
The only really workable way to develop large software projects, just as
the only really workable way to run a large business, is a state of
controlled chaos.
"""
*before* I had read Brown and Eisenhardt's "Competing on the Edge:
Strategy as Structured Chaos" (at that time I had no real-world interest
in strategically managing a large business -- it was based on mere
intellectual curiosity and extrapolation that I wrote "controlled chaos"
where B & E have "structured chaos" so well and clearly explained;-).

BTW, if you want to read my entire post on that Austrian server, the
most direct URL is
<http://groups.google.at/group/comp.lang.python/msg/b977ed1312e10b21?>
...


Alex


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Sep 12 03:37:55 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 12 Sep 2007 09:37:55 +0200
Subject: Python 3K or Python 2.9?
In-Reply-To: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
Message-ID: <46e7974d$0$31726$426a74cc@news.free.fr>

TheFlyingDutchman a ?crit :
> Python user and advocate Bruce Eckel is disappointed with the
> additions (or lack of additions) in Python 3:
> 
> http://www.artima.com/weblogs/viewpost.jsp?thread=214112
> 

I'd say Mr Eckel fails to graps some of the great points about Python's 
object model - the rant about the use of 'self' is a sure clue.


From stefan.behnel-n05pAM at web.de  Tue Sep 18 02:56:30 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Tue, 18 Sep 2007 08:56:30 +0200
Subject: Extracting xml from html
In-Reply-To: <1190061079.025479.129070@w3g2000hsg.googlegroups.com>
References: <1190061079.025479.129070@w3g2000hsg.googlegroups.com>
Message-ID: <46EF769E.4080103@web.de>

kyosohma at gmail.com wrote:
> I am attempting to extract some XML from an HTML document that I get
> returned from a form based web page. For some reason, I cannot figure
> out how to do this.
> Here's a sample of the html:
> 
> <html>
> <body>
> lots of screwy text including divs and spans
> <Row status="o">
>     <RecordNum>1126264</RecordNum>
>     <Make>Mitsubishi</Make>
>     <Model>Mirage DE</Model>
> </Row>
> </body>
> </html>
> 
> What's the best way to get at the XML? Do I need to somehow parse it
> using the HTMLParser and then parse that with minidom or what?

lxml makes this pretty easy:

   >>> parser = etree.HTMLParser()
   >>> tree = etree.parse(the_file_or_url, parser)

This is actually a tree that can be treated as XML, e.g. with XPath, XSLT,
tree iteration, ... You will also get plain XML when you serialise it to XML:

   >>> xml_string = etree.tostring(tree)

Note that this doesn't add any namespaces, so you will not magically get valid
XHTML or something. You could rewrite the tags by hand, though.

Stefan


From michele.simionato at gmail.com  Tue Sep  4 00:06:56 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Tue, 04 Sep 2007 04:06:56 -0000
Subject: programming by contract using "decorators"
In-Reply-To: <1188873829.158006.131900@y42g2000hsy.googlegroups.com>
References: <1188873829.158006.131900@y42g2000hsy.googlegroups.com>
Message-ID: <1188878816.433034.32010@d55g2000hsg.googlegroups.com>


Russ wrote:
> Dealing with the arguments was not a trivial matter -- at least not
> for me. I had to experiment a bit to get it right. The "getarg"
> function is simply a utility for parsing the ordered and keyword
> arguments. It's very simple, but if something like this already
> exists, please let me know. Thanks.

Check out the decorator module at http://www.phyast.pitt.edu/~micheles/python/documentation.html


 Michele Simionato



From bdesth.quelquechose at free.quelquepart.fr  Sun Sep  9 11:33:26 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 09 Sep 2007 17:33:26 +0200
Subject: Python Database Apps
In-Reply-To: <mailman.403.1189541226.2658.python-list@python.org>
References: <1189479130.905136.196820@r34g2000hsd.googlegroups.com>
	<mailman.403.1189541226.2658.python-list@python.org>
Message-ID: <46e707f9$0$3308$426a34cc@news.free.fr>

Tom Brown a ?crit :
> On Monday 10 September 2007 19:52, darien.watkins at gmail.com wrote:
> 
>>Kindof a poll, kindof curiosity...
>>
>>What is your favorite python - database combination?  I'm looking to
>>make an app that has a local DB and a server side DB.  I'm looking at
>>python and sqlite local side and sql server side.
>>
>>Any suggestions????
> 
> 
> I have had a lot of good luck with PostgreSQL. It is easy to install and use. 

Well... For an experimented (or opiniated) Unix user, at least !-)

But I can only second : PgSql is probably one of the best free RDBMS 
around - one of my previous associates (and still friend !-), who has 
quite a few years of experience as an Oracle DBA, consider it (pg) as 
mostly as good as Oracle, and eventually better on some points. My own 
experience with Pg for web applications is that it JustWorks(tm) - never 
had a single problem with it. I wish I could say so about MySQL.

wrt/ sqlite, I've only used it for small web apps, and the only problem 
I had was a strange incompatibility bug with first PHP5 versions 
installed on the same machine. Since I doubt your users will have PHP5 
installed on the client machines (!), this should not be a problem.

And, while it may takes some time to learn, SQLAlchemy is a very great lib.


From xah at xahlee.org  Mon Sep 10 09:59:53 2007
From: xah at xahlee.org (Xah Lee)
Date: Mon, 10 Sep 2007 06:59:53 -0700
Subject: printing list containing unicode string
Message-ID: <1189432793.383166.156710@d55g2000hsg.googlegroups.com>

If i have a nested list, where the atoms are unicode strings, e.g.

# -*- coding: utf-8 -*-
ttt=[[u"?",u"?"], [u"???"],...]
print ttt

how can i print it without getting the u'\u1234' notation?
i.e. i want it print just like this: [[u"?"], ...]

I can of course write a loop then for each string use
"encode("utf-8")", but is there a easier way?

Thx.

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



From lasses_weil at klapptsowieso.net  Fri Sep  7 09:59:53 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Fri, 07 Sep 2007 15:59:53 +0200
Subject: unexpected behavior: did i create a pointer?
In-Reply-To: <pan.2007.09.07.10.40.46@REMOVE.THIS.cybersource.com.au>
References: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>	<46e11dfe$0$4517$9b4e6d93@newsspool3.arcor-online.net>
	<pan.2007.09.07.10.40.46@REMOVE.THIS.cybersource.com.au>
Message-ID: <46e15959$0$16104$9b4e6d93@newsspool1.arcor-online.net>

Steven D'Aprano wrote:
> On Fri, 07 Sep 2007 11:46:38 +0200, Wildemar Wildenburger wrote:
> 
>> gu wrote:
>>> hi to all!
>>> after two days debugging my code, i've come to the point that the
>>> problem was caused by an unexpected behaviour of python. or by lack of
>>> some information about the program, of course! i've stripped down the
>>> code to reproduce the problem:
>>>
>>> [snip FAQ]
>> Yes, basically you *created* a pointer. That's all that python has:
>> pointers.
> 
> No, you are confusing the underlying C implementation with Python.
I do not, as I have no clue of the C implementation :).
I just thought I'd go along with the analogy the OP created as that was 
his mindset and it would make things easier to follow if I didn't try to 
forcibly change that.
Please note that I had intended for the word 'created' to be in quotes 
rather than asterisks. I bit myself after I read my mistake online but 
then thought "Who cares?". I should have, maybe :).
And yes, I will admit that going along with that analogy isn't the best 
way to explain it. Grant Edwards in reply to Peter Otten makes it much 
clearer, I guess.

/W


From pavlovevidence at gmail.com  Wed Sep 12 16:55:07 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Wed, 12 Sep 2007 13:55:07 -0700
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <1189630374.506503.190690@r34g2000hsd.googlegroups.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189604018.520338.162520@57g2000hsv.googlegroups.com>
	<46e7f450$0$12305$426a74cc@news.free.fr>
	<1189608231.151112.147550@y42g2000hsy.googlegroups.com>
	<mailman.444.1189611299.2658.python-list@python.org>
	<1i4bnbp.1l8sr3mjdojghN%aleax@mac.com>
	<1189630374.506503.190690@r34g2000hsd.googlegroups.com>
Message-ID: <1189630507.918811.65270@50g2000hsm.googlegroups.com>

On Sep 12, 4:52 pm, Carl Banks <pavlovevide... at gmail.com> wrote:
> (The loops would necessarily be unwrapped in the actual
> bytecode.)


And by unwrapped, I mean unrolled.

:E3


Carl Banks



From mccredie at gmail.com  Thu Sep 20 17:38:59 2007
From: mccredie at gmail.com (Matt McCredie)
Date: Thu, 20 Sep 2007 14:38:59 -0700
Subject: re question
In-Reply-To: <d6944c490709190517t390086d4m915b77b1cef5055a@mail.gmail.com>
References: <d6944c490709190517t390086d4m915b77b1cef5055a@mail.gmail.com>
Message-ID: <9e95df10709201438i2000c972gd6c63864edeb54a1@mail.gmail.com>

On 9/19/07, Dan Bar Dov <bardov at gmail.com> wrote:
> I'm trying to construct a regular expression to match valid IP address,
> without leading zeroes (i.e
> 1.2.3.4, 254.10.0.0, but not 324.1.1.1, nor 010.10.10.1)
>
> This is what I come up with, and it does not work.
>
> r'(^[12]?\d{0,2}\.){3,3}[12]?\d{0,2}'
>
> What am I doing wrong?

I'm not sure what affect having the "^" inside of the parens will
have, but it surely isn't what you want.

This part: r"[12]?\d{0,2}" will match the following strings, which I'm
sure you dont' want:

"" - yes it will match an empty string (Is "..." a valid IP?)
"00" - It could start with a 0, as long as there are only two characters
"299" - A little outside of the range you are interested in

That {3,3} is better written as {3}.

> Any common knowledge IP matching RE?

I don't know if there is any common knowledge RE, but I came up with
the following:

r"((1\d{2}|2[0-4]\d|25[0-5]|[1-9]\d|\d)\.){3}(1\d{2}|2[0-4]\d|25[0-5]|[1-9]\d|\d)")

Let us break it down:

This matches an octet:
    r"(1\d{2}|2[0-5]\d|[1-9]\d|\d)"

Which will match any ONE of the following
    1\d{2}  - A "1" followed by any two digits
    2[0-4]\d - A "2" followed by 0,1,2,3 or 4 followed by any digit
    25[0-5] - A "25" followed by 0,1,2,3,4 or 5
    [1-9]\d - Any digit but 0 followed by any digit
    \d - Any Digit

I generally discourage people from using REs. I think the folowing is
much easier to read:

def isip(x):
    octs = x.split(".")
    if len(octs) != 4:
        return False
    for oct in octs:
        if len(oct) > 1 and oct[0] == "0":
            return False
        try:
            if not 0 <= int(oct) < 256:
                return False
        except ValueError:
            return False
    return True

Both solutions seem to work, though I used a small set of test cases.
Others may have better suggestions.

Matt


From hemanthps at gmail.com  Wed Sep 19 04:01:26 2007
From: hemanthps at gmail.com (hemanth)
Date: Wed, 19 Sep 2007 01:01:26 -0700
Subject: Creating OpenOffice doc's
In-Reply-To: <LcZHi.78$zy3.77@newsfe02.lga>
References: <LcZHi.78$zy3.77@newsfe02.lga>
Message-ID: <1190188886.834811.260350@57g2000hsv.googlegroups.com>

Go to http://ooolib.sourceforge.net/ and download the Python version
and unzip the file.
There are a few examples illustrating various features. I have used
this to create simple OO
spreadsheets.

Regards,
Hemanth Sethuram



From ricaraoz at gmail.com  Wed Sep 26 16:47:58 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Wed, 26 Sep 2007 17:47:58 -0300
Subject: Delete values from a string using the index
In-Reply-To: <1190838311.630506.64670@y42g2000hsy.googlegroups.com>
References: <1190838311.630506.64670@y42g2000hsy.googlegroups.com>
Message-ID: <46FAC57E.5090000@bigfoot.com>

koutoo at hotmail.com wrote:
> How do I delete or remove values from a list or string using the
> index.
> 
> If a = [1,2,3,4,5,6,7,8] and I want to get rid of 1 -5, how would I do
> that?
> 
> Thanks.
> 

If you want to do it all at once :

del a[1:4:2]


From martin at v.loewis.de  Sat Sep 22 13:29:26 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 22 Sep 2007 19:29:26 +0200
Subject: unicode categories -- regex
In-Reply-To: <1190476650.222233.187800@57g2000hsv.googlegroups.com>
References: <1190476650.222233.187800@57g2000hsv.googlegroups.com>
Message-ID: <46F550F6.3030805@v.loewis.de>

> So how do i include this information in regular pattern search? Any
> ideas?

At the moment, you have to generate a character class for this yourself,
e.g.

py> chars = [unichr(i) for i in range(sys.maxunicode)]
py> chars = [c for c in chars if unicodedata.category(c)=='Po']
py> expr = u'[\\' + u'\\'.join(chars)+"]"
py> expr = re.compile(expr)
py> expr.match(u"#")
<_sre.SRE_Match object at 0xb7ce1d40>
py> expr.match(u"a")
py> expr.match(u"\u05be")
<_sre.SRE_Match object at 0xb7ce1d78>

Creating this expression is fairly expensive, however, once compiled,
it has a compact representation in memory, and matching it is
efficient.

Contributions to support categories directly in re are welcome. Look
at the relevant Unicode recommendation on how to do that.

HTH,
Martin


From iclark at mail.ewu.edu  Fri Sep 21 11:38:07 2007
From: iclark at mail.ewu.edu (Ian Clark)
Date: Fri, 21 Sep 2007 08:38:07 -0700
Subject: acronym program
In-Reply-To: <46F3D8B5.60908@gmail.com>
References: <46F3D8B5.60908@gmail.com>
Message-ID: <fd0ogv$d6e$1@sea.gmane.org>

Shawn Minisall wrote:
> I'm trying to write a program that gets the first letter of every word 
> of a phrase and prints it on screen.  I'm having problems with it.  I'm 
> thinking a for loop would be good since I don't know the exact number of 
> words the user is going to enter, but after that I get confused.  How do 
> I tell python to just goto the beg of each word in the phrase and 
> include it in the acronym?  Am I on the right track?
> 
>     for a in string.split(phrase)
>     acronym = phrase [0]
>     acronym = acronym + 1
> 
> thx

List comprehensions[1] to the rescue!

     >>> phrase = 'hello there i am well how are you?'
     >>> acronym = [word[0] for word in phrase.split()]
     >>> acronym
     ['h', 't', 'i', 'a', 'w', 'h', 'a', 'y']

Ian

[1] http://docs.python.org/tut/node7.html#SECTION007140000000000000000



From bj_666 at gmx.net  Mon Sep  3 12:42:43 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 3 Sep 2007 16:42:43 GMT
Subject: TypeError: 'module object is not callable'
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<mailman.315.1188810174.28954.python-list@python.org>
	<46dbd11e$0$6228$426a74cc@news.free.fr>
	<mailman.317.1188812089.28954.python-list@python.org>
	<1188816626.021956.281040@22g2000hsm.googlegroups.com>
	<5k2cjmF1r2aiU1@mid.uni-berlin.de>
	<1188836008.656284.76160@o80g2000hse.googlegroups.com>
Message-ID: <5k2rs3F1t3qcU1@mid.uni-berlin.de>

On Mon, 03 Sep 2007 16:13:28 +0000, christophertidy wrote:

> Within my main.py file I have
> 
> class Main(object):
>     stepStore = StepStore()
> 
>     @staticmethod
>     def createDepSteps():
>         ....
>         stepStore.addStep([bol7, pre5])
>         .......
> 
>     @staticmethod
>     def processSteps():
>         for step in stepStore.stepList[:]:
>         ......
> 
> Main.createDepSteps()
> Main.processSteps()


What's `Main` useful for?  Is Java shining through again?  A class with
just static methods isn't a class but just a container for functions.  But
functions usually live in modules in Python so get rid of that class and
move the functions to module level.

> Trying this approach I am getting a error saying with the
> processSteps() method, stepStore is undefined

`stepStore` is searched in the function and then in the module.  But it
is defined in the class.  So you have to access `Main.stepStore`.  Unless
you are modifying `stepStore.stepList` while iterating over it, you don't
need to make a copy by the way.

Ciao,
	Marc 'BlackJack' Rintsch


From hat at se-162.se.wtb.tue.nl  Wed Sep 19 08:18:30 2007
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Wed, 19 Sep 2007 14:18:30 +0200
Subject: How can I know how much to read from a subprocess
References: <1190070896.332844.23080@22g2000hsm.googlegroups.com>
	<1190072376.600475.254260@y42g2000hsy.googlegroups.com>
	<slrnfevb8h.299.hat@se-162.se.wtb.tue.nl>
	<1190130585.255648.312730@q3g2000prf.googlegroups.com>
Message-ID: <slrnff24sm.43o.hat@se-162.se.wtb.tue.nl>

On 2007-09-18, spam.noam at gmail.com <spam.noam at gmail.com> wrote:
> On Sep 18, 1:48 pm, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
>> On 2007-09-17, spam.n... at gmail.com <spam.n... at gmail.com> wrote:
>>
>> > It seems that another solution is gobject.io_add_watch, but I don't
>> > see how it tells me how much I can read from the file - if I don't
>> > know that, I won't know the argument to give to the read() method in
>> > order to get all the data:
>>
>> >http://www.pygtk.org/docs/pygobject/gobject-functions.html#function-g...
>>
>> Usually, gobject only tells you that data is there (that is all it knows).
>> Therefore a read(1) should be safe.
>
> But even if it's fast enough, how do you know how many times you
> should call read(1)? If you do it too much, you'll be blocked until
> more output is available.

after reading 1 byte, wait for gobject again.

In other words, when gobject sends a notice, read 1 byte.
When there is more, gobject will tell you (probably very often :-) ).


>
>> If that is too slow, consider os.read() which reads all data available (afaik,
>> never tried it myself).
>>
> I tried it now, and it blocks just like the normal file.read().

So "os.read(handle.fileno(), 1000000)" blocks after gobject tells you there is data?
That is different than I heard, but you are probably correct, I cannot easily test this.


Albert


From arnau at ehas.org  Sat Sep 15 09:56:40 2007
From: arnau at ehas.org (Arnau Sanchez)
Date: Sat, 15 Sep 2007 15:56:40 +0200
Subject: how to join array of integers?
In-Reply-To: <a23effaf0709150551g19c611eqe1c912acf02306d3@mail.gmail.com>
References: <1189859762.563599.269270@g4g2000hsf.googlegroups.com>
	<a23effaf0709150551g19c611eqe1c912acf02306d3@mail.gmail.com>
Message-ID: <46EBE498.9040800@ehas.org>

js escribi?:

>> On 9/15/07, Summercool <Summercoolness at gmail.com> wrote:

>> in Python... is the method to use  ",".join() ?  but then it must take
>> a list of strings... not integers...
>>
>> any fast method?

 > print ''.join([str(i) for i in [1,2,3]])

It's better to use generator comprehension instead of LC:

",".join(str(i) for i in [1, 2, 3])

Or, if you happen to like the itertools modules:

from itertools import imap
",".join(imap(str, [1, 2, 3]))


From michele.simionato at gmail.com  Wed Sep 12 00:50:21 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Tue, 11 Sep 2007 21:50:21 -0700
Subject: Basic GUI
In-Reply-To: <1189569282.372083.264560@57g2000hsv.googlegroups.com>
References: <1189569282.372083.264560@57g2000hsv.googlegroups.com>
Message-ID: <1189572621.451715.280680@r34g2000hsd.googlegroups.com>

On Sep 11, 11:54 pm, Don Hanlen <dhan... at owt.com> wrote:
> I could solve my problems with the following psuedo-code made into
> real code:
> ----
>     import blah
>
>     t = blah.fork(runthisprogram.py)
>
>     #OK still in main
>     t.sendinfo(info)
>     info = t.receiveinfo()
> ----
>     #runthisprogram.py
>     def sendinfobacktopapa():
>         ? eventhere
>     def getinfofrompapa():
>         ? eventhere
> ----
>
> It seems to me that propagating events *may* be the best way to
> communicate.  I'm wide open, including to non-multi-process solutions.
>
> Thanks for your comments, I searched old posts for a while, various
> other Python info-sources, and couldn't find an answer.
> --
> don

Have a look at the 'processing' module.

    Michele Simionato



From evan at yelp.com  Wed Sep 12 01:49:59 2007
From: evan at yelp.com (Evan Klitzke)
Date: Tue, 11 Sep 2007 22:49:59 -0700
Subject: 2 daemons write to a single file /w python file IO
In-Reply-To: <fc7p9i$1rr$1@sea.gmane.org>
References: <fc7p9i$1rr$1@sea.gmane.org>
Message-ID: <1189576199.5842.10.camel@thinkpad>

On Tue, 2007-09-11 at 21:17 -0700, Andrey wrote:
> HI
> 
> i have a newbie question about the file() function.
> I have 2 daemons running on my linux box.
> 
> 1 will record the IDs to a file - logs.txt
> other 1 will open this file, read the IDs, and then "Clean up the 
> file" -logs.txt
> 
> Since these 2 daemons will run every 2-5mins, I think this will crash, isn't 
> it? When both daemons try to write to the file at the same time.

They will not crash. If you're writing a small amount of data using
os.write (e.g. a line or two at a time), the writes will probably end up
being atomic, and you don't have to worry about anything. This isn't
guaranteed of course, but if you're not writing out large buffers you
probably don't need to worry about it at all. The worst case scenario is
that the writes will be interleaved (e.g. daemon 1 writes "foo", daemon
2 writes "bar", and what ends up in the file is something like
"fbaroo"), there is not danger of crashing. The regular write method of
file objects is buffered, so I'd imagine that is more likely to have
this problem.

> I am wondering if this won't crash, OR if there is some simple high-level 
> functions can lock the file while writing...

There is a standard syscall in POSIX system that does real file locking
-- it's called flock. You can access it using the fcntl module as
fcntl.flock. The man page for flock has more details.

Basically what you need to do is call fcntl.flock before writing to the
file in each of your processes. The process will block until the lock is
released. On Linux the lock will be advisory only, so if you don't use
flock everywhere you can still have multiple processes with the file
descriptor open and writable at once.

> I also wonder if one side locked the file, what happens if the other side 
> try to open this locked file? raise error? so i also need to write a loop to 
> wait for the file to release locking?

The flock call will block if the file is already locked.

-- 
Evan Klitzke <evan at yelp.com>



From aleax at mac.com  Sun Sep  2 14:46:51 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 2 Sep 2007 11:46:51 -0700
Subject: Adding attributes stored in a list to a class dynamically.
References: <mailman.297.1188755850.28954.python-list@python.org>
Message-ID: <1i3t9va.1jkz4om1sajk8pN%aleax@mac.com>

Nathan Harmston <ratchetgrid at googlemail.com> wrote:

> Hi,
> 
> Sorry if the subject line of post is wrong, but I think that is what
> this is called. I want to create objects with
> 
> class Coconuts(object):
>     def __init__(self, a, b, *args, **kwargs):
>       self.a = a
>       self.b = b
> 
> def spam( l )
>    return Coconuts( l.a, l.b, l.attributes )
> 
> l in a parse line of a file which is a tuple wrapped with
> attrcol......with attributes a, b and attributes (which is a list of
> strings in the format key=value ie...
>        [ "id=bar", "test=1234", "doh=qwerty" ]  ).
> 
> I want to add attributes to Coconuts so that I can do
> print c.id, c.test, c.doh
> 
> HOwever I m not sure how to do this:
> 
> how can i assign args, kwargs within the constructor of coconuts and
> how can I deconstruct the list to form the correct syntax to be able
> to be used for args, kwargs.

If you want to pass the attributes list it's simpler to do that
directly, avoiding *a and **k constructs.  E.g.:

  def __init__(self, a, b, attrs):
    self.a = a
    self.b = b
    for attr in attrs:
      name, value = attr.split('=')
      setattr(self, name, value)

You may want to add some better error-handling (this code just raises
exceptions if any item in attrs has !=1 occurrences of the '=' sign,
etc, etc), but I hope this gives you the general idea.

Note that you'll have trouble accessing attributes that just happen to
be named like a Python keyword, e.g. if you have "yield=23" as one of
your attributes you will NOT be able to just say c.yield to get at that
attribute.  Also, I'm assuming it's OK for all of these attributes'
values to be strings, etc, etc.


Alex


From hpepper at gmail.com  Tue Sep 11 06:20:21 2007
From: hpepper at gmail.com (HowiPepper)
Date: Tue, 11 Sep 2007 03:20:21 -0700
Subject: why should I learn python
In-Reply-To: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
Message-ID: <1189506021.315340.108490@y42g2000hsy.googlegroups.com>

On Sep 6, 5:32 pm, windandwaves <nfranc... at gmail.com> wrote:
> Can someone tell me why I should learn python?  I am a webdeveloper,
> but I often see Python mentioned and I am curious to find out what I
> am missing out on.
>
> Thank you
>
> Nicolaas

Nicholaas,

There are many reasons to learn Python, and few not to.  I'm another
one of those "multiple language" programmers, and have worked in C/C++
(yes, both of them), Java, Pascal (and Delphi), BASIC (and it's Visual
cousin), Clipper, Perl, PHP and Python (and a couple of dialects of
Unix shell scripting as well).

I started working in Perl back in 1998, mainly for web development.
Since then, I've done just about anything possible you can do with
Perl, and used it as my "Swiss army chainsaw" for practically anything
I needed to do.  I got a contract with IBM, back in May of 2005, and
soon found out the group I worked with used Python for all of it's
"discretionary" development.  I started reading "A Byte of Python",
and was soon hooked.  I spent the next two years using Python as my
exclusive scripting language.  And by scripting, I mean anything from
one or two line throw-aways, to major programs.  Python makes it so
easy to build like that!

My new job, which I started several months ago, put me squarely back
in the Perl realm.  Now I really miss Python!  I've discussed with my
supervisor porting all of our Perl scripts over to Python, and he is
receptive, but I'm not holding my breath :-(  For now, I use Perl and
shell at work, and Python (and shell) at home.

Python is just so much nicer than any other language I've developed
in.  Once you get the swing of it (no pun intended), you will find
you're way more productive, your programs turn out better and are much
easier to go back to six months or a year later, and work with.  Right
now, I'm going through Perl hell, trying to figure out what the heck
the past two guys did and why! ;-)

Regards,
Howard



From mail at timgolden.me.uk  Thu Sep  6 07:58:10 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 06 Sep 2007 12:58:10 +0100
Subject: How to do python and RESTful
In-Reply-To: <fbooog$uf9$1@sea.gmane.org>
References: <1189022079.403495.175800@g4g2000hsf.googlegroups.com>
	<fbooog$uf9$1@sea.gmane.org>
Message-ID: <46DFEB52.3090806@timgolden.me.uk>

[MarkyMarc]
>> I have be looking at quixote, but is this uptodate? "plain"
>> mod_python, can this make url to http put,get,delete and post?

[Steve Holden]
> Would you care to explain why quixote needs to be "uptodate"? Surely it 
> either does what you want or it doesn't? If it dies, then it hardly 
> matters how "up to date" it is. Are you also concerned that some parts 
> of Python remains unchanged since before 1.5.2, now almost tne years old?

FWIW, I have used Quixote on two (v. small-scale) production websites,
both started several years ago when there were fewer web toolkits in
the Python universe. Every so often I consider reworking one or other
of them into one of the newer (read: more recently noised about)
toolkits/frameworks. But they work fine as they are, so why bother?
As a matter of fact, one uses Quixote v1, the other uses v2 which
occasionally throws me when I'm doing some work on both at the same
time!

TJG


From rups77 at gmail.com  Thu Sep 27 14:05:44 2007
From: rups77 at gmail.com (Recruiter-Adobe)
Date: Thu, 27 Sep 2007 11:05:44 -0700
Subject: HOT!!!PYTHON DEVELOPER REQUIRED @ ADOBE SYSTEMS
Message-ID: <1190916344.841925.94900@57g2000hsv.googlegroups.com>

Hi PYTHON DEVELOPERS,

ADOBE SYSTEMS is looking for a PYTHON DEVELOPER who can troubleshoot
Python based applet which makes data base queries and populates Excel
tables used to generate pivot charts, graphs and tables showing bug
metrics. Isolate problem which is causing reports to crash and
institute fix.

 This is a position through Manpower at our customer Adobe Systems,
you will be employed as a Manpower's contractor.

Job Responsibilities:

?         Setup a new server (development environment)

?         Install updated versions of both python and other plugins
used for our applet.

?         Import Code/applet  instance.

?         Remove code that uploads it to the Production Server
Instance

?         Eventually move the entire Production Instance over to the
newer server.

?         Update Code to comply with the latest Python standards

Knowledge & Skills:

?         Expert in Python Programming

?         Experience in COM Object programming speficially Excel COM
Objects

?         Experience in using WebServices (SOAP)

?         Win2k System Administration Experience a Plus

?         Need to migrate from version 2.3 to latest version of Python

Hourly Pay rate: $85-$100/hr

If interested, please send a Word copy of your resumeto
rbadame at manpowersj.com with your expected hourly rate, availability,
visa status, best time and phone # to contact you.



From hat at se-162.se.wtb.tue.nl  Thu Sep 13 03:11:39 2007
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Thu, 13 Sep 2007 09:11:39 +0200
Subject: Parallel/Multiprocessing script design question
References: <yK3Gi.61203$Pv4.51195@newsfe19.lga>
Message-ID: <slrnfeholb.4fp.hat@se-162.se.wtb.tue.nl>

On 2007-09-13, Amit N <nospam at 23342.om> wrote:
> Hi guys,
>
> I tend to ramble, and I am afraid none of you busy experts will bother 
> reading my long post, so I will try to summarize it first:

I haven't read the details, but you seem to aim for a single python program
that does 'it'. A single sequential thread is not fast enough, so you want
parallel execution (and yes there are a zillion ways of doing that).

Why don't you start at the other end?

Write a program for each task that you have, then fork/spawn/chain/whatever
enough processes at OS level to eat all your data. The OS is usually much
better at balancing CPU's. The Python module 'subprocess' would be your friend
in that case.

In addition, you can run each program independently, which will come in handy
one day.


Sincerely,
Albert



From __peter__ at web.de  Wed Sep 12 05:17:14 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 12 Sep 2007 11:17:14 +0200
Subject: Get Only the Last Items in a Traceback
References: <1189562968.529414.27910@w3g2000hsg.googlegroups.com>
Message-ID: <fc8aqq$3us$02$1@news.t-online.com>

Am Wed, 12 Sep 2007 02:09:28 +0000 schrieb gregpinero at gmail.com:

> I'm running code via the "exec in context" statement within a much
> larger program.  What I would like to do is capture any possible
> errors and show a pretty traceback just like the Python interactive
> interpreter does, but only show the part of the traceback relating to
> the code sent to exec.
> 
> For example here is the code I'm using:
> 
> try:
>     exec code
> except Exception,Err:
>     traceback.print_exc()
> 
> Which gives me something like this when it catches an exception:
> 
> Traceback (most recent call last):
>   File "/....py", line 843, in run
>     semi_safe_exec.safe_eval(code.replace('\r',''),context,5)
>   File ".....py", line 400, in safe_eval
>     exec_timed(code, context, timeout_secs)
>   File ".....py", line 353, in exec_timed
>     exec code in context
>   File "<string>", line 7, in ?
>   File "<string>", line 5, in func2
>   File "<string>", line 2, in func1
> ZeroDivisionError: integer division or modulo by zero
> 
> What I want to print instead is just something like:
> 
> Traceback (most recent call last):
>   File "<string>", line 7, in ?
>   File "<string>", line 5, in func2
>   File "<string>", line 2, in func1
> ZeroDivisionError: integer division or modulo by zero
> 
> Thanks in advance for the help.
> 
> -Greg
> 
> P.S. if it matters, for this example, code in exec code is:
> 
> def func1():
>     print 7/0
> 
> def func2():
>     func1()
> 
> func2()

Your assessment is wrong. You only get the extra lines in the traceback if
you don't immediately wrap the exec statement in a try ... except block:

$ cat snip_traceback1.py
import traceback

def alpha():
    try:
        beta()
    except Exception, e:
        traceback.print_exc()

def beta():
    gamma()

def gamma():
    exec s in {}

s = """ 
def delta():
    epsilon()
    
def epsilon():
    1/0
delta()
"""

if __name__ == "__main__":
    alpha()

$ python snip_traceback1.py 
Traceback (most recent call last):
  File "snip_traceback1.py", line 5, in alpha
    beta()
  File "snip_traceback1.py", line 10, in beta
    gamma()
  File "snip_traceback1.py", line 13, in gamma
    exec s in {}
  File "<string>", line 7, in <module>
  File "<string>", line 3, in delta
  File "<string>", line 6, in epsilon
ZeroDivisionError: integer division or modulo by zero

So the first step is to move the try ... except closer to the exec:

$ cat snip_traceback2.py
import traceback

def alpha():
    beta()

def beta():
    gamma()

def gamma():
    try:
        exec s in {}
    except Exception, e:
        traceback.print_exc()

s = """ 
def delta():
    epsilon()
    
def epsilon():
    1/0
delta()
"""

if __name__ == "__main__":
    alpha()

$ python snip_traceback2.py 
Traceback (most recent call last):
  File "snip_traceback2.py", line 11, in gamma
    exec s in {}
  File "<string>", line 7, in <module>
  File "<string>", line 3, in delta
  File "<string>", line 6, in epsilon
ZeroDivisionError: integer division or modulo by zero

You are almost there. Now let's strip off the outermost traceback:

$ cat snip_traceback3.py
import sys
import traceback

def alpha():
    beta()

def beta():
    gamma()

def gamma():
    try:
        exec s in {}
    except Exception, e:
        etype, value, tb = sys.exc_info()
        traceback.print_exception(etype, value, tb.tb_next)

s = """ 
def delta():
    epsilon()
    
def epsilon():
    1/0
delta()
"""

if __name__ == "__main__":
    alpha()

$ python snip_traceback3.py 
Traceback (most recent call last):
  File "<string>", line 7, in <module>
  File "<string>", line 3, in delta
  File "<string>", line 6, in epsilon
ZeroDivisionError: integer division or modulo by zero

Heureka.

Peter


From mail at timgolden.me.uk  Thu Sep 27 07:57:34 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 27 Sep 2007 12:57:34 +0100
Subject: Cross-platform time out decorator
In-Reply-To: <1190802115.585306.250400@o80g2000hse.googlegroups.com>
References: <1190802115.585306.250400@o80g2000hse.googlegroups.com>
Message-ID: <46FB9AAE.9070606@timgolden.me.uk>

Joel wrote:
> I've been using this nice timing out decorator :
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/307871 . The
> problem is that since it relies on sigalarm, it doesn't work under
> windows. Would anyone know how to do a cross-platform version?

I don't think you're going to find anything straightforward. AFAIK,
there's nothing on the Windows side of things which is directly
equivalent to the signals business in *nix. Sure, you can mess around
with timers and threads and events and so on. But it's far from being
the built-in tool which the signal module gives you.

TJG


From rgilbert88 at comcast.net  Sun Sep  2 11:18:11 2007
From: rgilbert88 at comcast.net (Richard B. Gilbert)
Date: Sun, 02 Sep 2007 11:18:11 -0400
Subject: Let's Unite Against Jews and Mongrels!
References: <1188198797.772672.60840@r29g2000hsg.googlegroups.com>
	<1188300284.507909.126770@57g2000hsv.googlegroups.com>
	<46D40BFE.2020301@comcast.net>
	<1188744204.822322.198360@57g2000hsv.googlegroups.com>
Message-ID: <46DAD433.1030503@comcast.net>

Zentrader wrote:
> On Aug 28, 4:50 am, "Richard B. Gilbert" <rgilber... at comcast.net>
> wrote:
> 
>>>Unless, of course, someone has a working "Killbot".  If anyone has such
>>
>>a thing, please kill that "MI5victim" moron as well!
> 
> 
> I reported MI5victim to spam at uce.gov and it appears to be gone, as
> well as the "free air conditioner"'s posts.  (Thanks Steve Holden for
> the reminder that it doesn't have to be personal e-mail spam in order
> to be reported). If the OP posts again, report it.  Something like 75%
> of internet mail is spam.
> 

MI5victim was alive and (I won't say well!!) a week ago.  It remains to 
be seen if he's gone.  And if you believe that reporting spam to 
spam at uce.gov actually has any effect on spam, you must believe in the 
Tooth Fairy as well!

There will be spam as long as there are morons who will send the 
spammers money for whatever they're peddling!  I still get two or three 
"Spanish Prisoner" a/k/a "401" scams each week (this is the one where 
somebody has $30,000,000 US and will share it with you if only you will 
send him a little of your money)!  The US government does seem to have 
cracked down on the "Pharmacy" spam and the internet "pharmacies" that 
were behind it.

Remember, it costs essentially nothing to send spam to 30,000,000 people 
  and if the spammer gets 0.5% response, he's ahead of the game!




From robert.rawlins at thinkbluemedia.co.uk  Mon Sep 24 07:23:25 2007
From: robert.rawlins at thinkbluemedia.co.uk (Robert Rawlins - Think Blue)
Date: Mon, 24 Sep 2007 12:23:25 +0100
Subject: Almost There - os.kill()
Message-ID: <002601c7fe9d$52ffb9c0$f8ff2d40$@rawlins@thinkbluemedia.co.uk>

Hello Guys,

 

Finally got around to sitting down to tidy up this script this morning but
I'm having a small syntax problem with os.kill() to kill a process on my
system. Here is the code:

 

def killApplication():

 

       pid = file('/var/lock/MyApplication.lock').read().strip()

       

       logging.info('Killing Application Process: %s' % pid)

 

       os.kill(pid, 15)

 

       logging.info('Application %s Killed' % pid)

 

As you can see if rips the PID from the lock file, which works fine as I get
log data which says 'Killing Application Process: 3079' exactly as I would
expect it too. However when I run this script I get the following error:

 

Traceback (most recent call last):

  File "/pblue/new/Alive.py", line 50, in ?

    main()

  File "/pblue/new/Alive.py", line 47, in main

    doCheck()

  File "/pblue/new/Alive.py", line 43, in doCheck

    killApplication()

  File "/pblue/new/Alive.py", line 28, in killApplication

    os.kill(pid, 15)

TypeError: an integer is required

 

Which would suggest its passing those arguments in as the wrong data types
to the kill command. What is the best way to convert these?

 

Thanks guys,

 

Rob

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From Erik-wikstrom at telia.com  Sun Sep 30 07:50:07 2007
From: Erik-wikstrom at telia.com (=?UTF-8?B?RXJpayBXaWtzdHLDtm0=?=)
Date: Sun, 30 Sep 2007 11:50:07 GMT
Subject: which language allows you to change an argument's value?
In-Reply-To: <1191149233.346818.246170@22g2000hsm.googlegroups.com>
References: <1191149233.346818.246170@22g2000hsm.googlegroups.com>
Message-ID: <P3MLi.10035$ZA.6750@newsb.telia.net>

On 2007-09-30 12:47, Summercool wrote:
> I wonder which language allows you to change an argument's value?
> like:
> 
> foo(&a) {
>   a = 3
> }
> 
> n = 1
> print n
> 
> foo(n)     # passing in n, not &n
> print n
> 
> and now n will be 3.  I think C++ and PHP can let you do that, using

Since you know C++ can do it why do you include c.l.c++? Honestly cross-
posting to groups discussing so many different groups is seldom a good
idea since the languages differ too much for a useful discussion.

> their reference (alias) mechanism.  And C, Python, and Ruby probably
> won't let you do that.  What about Java and Perl?

C will let you do it with pointers (it is just a syntactical difference
from references in this case) and Java's references allows it. I do not
know about Ruby, Python and Perl, but (AFAIK) the all have OO support so
I would be surprised if they used purely value semantics.

> is there any way to prevent a function from changing the argument's
> value?

Some languages, like C++ have the ability to make an argument const.

> isn't "what i pass in, the function can modify it" not a desireable
> behavior if i am NOT passing in the address of my argument?  For one

Being able to pass the actual object instead of a copy is highly
desirable for two reasons. In most languages only one return value is
allowed for a function so the ability to change parameters allows you to
artificially return more without having to wrap them in constructs. The
second reason is that for large objects the performance hit of having to
create a copy each time you call a function can be forbidding.

> thing, if we use a module, and call some functions in that module, and
> the module's author made some changes to his code, then we have no way
> of knowing what we pass in could get changed.  Of course, if it is in

As for knowing when a library function modifies an argument or not, well
that is why we have documentation.

> Java, Python, and Ruby, and we pass in a reference to object (not C+
> +'s meaning of alias reference)

In what way does the C++ reference differ from those in Java, Python,
and Ruby in this situation?

-- 
Erik Wikstr?m


From byte8bits at gmail.com  Fri Sep 21 14:39:45 2007
From: byte8bits at gmail.com (byte8bits at gmail.com)
Date: Fri, 21 Sep 2007 18:39:45 -0000
Subject: RE Help
Message-ID: <1190399985.324448.242610@d55g2000hsg.googlegroups.com>

Not specific to Python, but it will be implemented in it... how do I
compile a RE to catch everything between two know values? Here's what
I've tried (but failed) to accomplish... the knowns here are START and
END:

data = "asdfasgSTARTpruyerfghdfjENDhfawrgbqfgsfgsdfg"
x = re.compile('START.END', re.DOTALL)

x.findall(data)



From steve at holdenweb.com  Tue Sep 11 08:24:39 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 11 Sep 2007 08:24:39 -0400
Subject: function to do dynamic import?
In-Reply-To: <13ecb84p1ghrd64@corp.supernews.com>
References: <13ecb84p1ghrd64@corp.supernews.com>
Message-ID: <fc61e6$9bt$1@sea.gmane.org>

bambam wrote:
> import works in the main section of the module, but does
> not work as I hoped when run inside a function.
> 
> That is, the modules import correctly, but are not visible to
> the enclosing (global) scope.
> 
> Questions:
> (1) Where can I read an explanation of this?
> (2) Is there a work around?
> 
> BTW, sys.modules("filename") shows that the module is
> loaded, I just don't know how to use it when loaded that
> way.  Also, if I import again at the global scope, the module
> name becomes available.
> 
There's not much wrong with doing this, since it gives you the best of 
both worlds. But you mean sys.modules["filename"], don't you?

>>>> def gim():
> ... exec "import gamel"
> ...
>>>> gim()
>>>> sys.modules["gamel"]
> <module 'gamel' from 'c:\gamel.pyc'>
>>>> gamel
> NameError: name 'gamel' is not defined
>>>> exec "import gamel"
>>>> gamel
> <module 'gamel' from 'c:\gamel.pyc'> 
> 
> 
Whoa there! There's a lot of difference between "importing a module 
inside a function" and "executing an import statement inside a function".

If you want to do dynamic imports then the __import__ function is what 
you need. Trying to use exec like that is a bad idea unless you clearly 
understand the relationship between the different namespaces involved. 
In fact, trying to use exec at all is a bad idea until you understand 
Python better, and even then it's not often a terrific idea.

Think of exec more as a hack of last resort than the first tool to reach 
for to solve a problem.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From orsenthil at gmail.com  Wed Sep  5 11:39:13 2007
From: orsenthil at gmail.com (O.R.Senthil Kumaran)
Date: Wed, 5 Sep 2007 21:09:13 +0530
Subject: PythonAlley.com
In-Reply-To: <2dc0c81b0709050727q7e56e99dnf8918e7d143d53a@mail.gmail.com>
References: <2dc0c81b0709050727q7e56e99dnf8918e7d143d53a@mail.gmail.com>
Message-ID: <20070905153913.GD3437@gmail.com>

* Shawn Milochik <Shawn at Milochik.com> [2007-09-05 10:27:08]:
> I bought the domain PythonAlley.com (and PerlAlley.com and
> 
> Does anyone have any ideas as to what a wonderful use for
> PythonAlley.com would be? I'd really like to do something with at

If "you" don't have an idea, most likely others wont have as well. :)

-- 
O.R.Senthil Kumaran
http://uthcode.sarovar.org


From info at thegrantinstitute.com  Sat Sep 29 05:37:47 2007
From: info at thegrantinstitute.com (Anthony Jones)
Date: 29 Sep 2007 02:37:47 -0700
Subject: Professional Grant Proposal Writing Workshop (December 2007:
	University of Washington, Seattle)
Message-ID: <20070929023747.42F41735AAA57F03@thegrantinstitute.com>

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From amitsafe1 at gmail.com  Thu Sep 13 06:55:51 2007
From: amitsafe1 at gmail.com (amit)
Date: Thu, 13 Sep 2007 03:55:51 -0700
Subject: Make money to share your videos
Message-ID: <1189680951.542069.25890@22g2000hsm.googlegroups.com>

Make money to share your videos
Goodtolove.com is sharing their 50% adsense revenue with you to post
videos of anything.
Just keep up logging in and start posting now to make money...



From vincent.sabard at amadeus.com  Thu Sep 27 10:37:06 2007
From: vincent.sabard at amadeus.com (Vincent Sabard)
Date: Thu, 27 Sep 2007 16:37:06 +0200
Subject: Getting web page throught a proxy (squid)
Message-ID: <OF5B20D076.1669F038-ONC1257363.00504163-C1257363.00504D22@amadeus.com>

salut jean-paul,

comment vas-tu ?

vincent sabard.
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From zzbbaadd at aol.com  Wed Sep 12 20:53:23 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Wed, 12 Sep 2007 17:53:23 -0700
Subject: Coming from Perl
In-Reply-To: <Cv%Fi.198$372.59@read2.cgocable.net>
References: <Cv%Fi.198$372.59@read2.cgocable.net>
Message-ID: <1189644803.816375.269950@y42g2000hsy.googlegroups.com>

On Sep 12, 5:30 pm, Amer Neely <perl4h... at softouch.on.ca> wrote:
> I'm a complete newbie with Python, but have several years experience
> with Perl in a web environment.
>
> A question I have, if someone here is familiar with Perl, does Python
> have something like Perl's 'here document'? I've just searched and read
> some postings on generating HTML but they all seem to refer to various
> template utilities. Is this the only way, or am I missing something? I'm
> used to generating X/HTML by hand, which makes the here document in Perl
> ideal for me. Also, many times a client already existing HTML code that
> I can use in a script.
>
> --
> Amer Neely
> w:www.webmechanic.softouch.on.ca/
> Perl | MySQL programming for all data entry forms.
> "Others make web sites. We make web sites work!"

I am not sure if this is what you are looking for, but Python has a
special string with 3 quotes that I believe duplicates part of the
functionality of a here document:

myHmtlHeader = """
<head attribute = "abc">
<title>My Page</title>
</head>
"""

print myHtmlHeader


outputs:


<head attribute="abc">
<title>My Page</title>
</head>



From gagsl-py2 at yahoo.com.ar  Sun Sep  9 17:17:42 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 09 Sep 2007 18:17:42 -0300
Subject: os.sep and os.path.sep
References: <1189352918.534864.195850@g4g2000hsf.googlegroups.com>
Message-ID: <op.tyen3sksx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 09 Sep 2007 12:48:38 -0300, billiejoex <gnewsg at gmail.com> escribi?:

>>>> import os
>>>> hasattr(os, 'sep')
> True
>>>> hasattr(os.path, 'sep')
> True
>
> By chance I noticed it.
> Are there differences (I think not...)?
> IMHO, if there are no differences os.path.sep should be removed since
> it may be confusing.

They are the same, as documented on  
http://docs.python.org/lib/os-path.html#l2h-2796
And why do you think os.path.sep would be confusing?

-- 
Gabriel Genellina



From mail at microcorp.co.za  Sat Sep 22 03:40:31 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 22 Sep 2007 09:40:31 +0200
Subject: Writing Object Data to Disk
References: <1190443648.5838.6.camel@ubuntu-laptop>
Message-ID: <017501c7fceb$f0093d80$03000080@hendrik>


"Amit Kumar Saha" <da....o.in> wrote:

> I would like to know if "Pickling" the class object is the only way of
> writing it to disk for persistent storage.

look at marshall and shelve

>...........................................................Also, do we have a
concept
> similar to "array of objects" in Python? The number of objects is only
> known at "run-time".

I would use a list

- Hendrik



From aahz at pythoncraft.com  Thu Sep 27 22:14:23 2007
From: aahz at pythoncraft.com (Aahz)
Date: 27 Sep 2007 19:14:23 -0700
Subject: Python 3.0 migration plans?
References: <mailman.1195.1190936289.2658.python-list@python.org>
Message-ID: <fdho1v$rj1$1@panix3.panix.com>

In article <mailman.1195.1190936289.2658.python-list at python.org>,
Steve Holden  <steve at holdenweb.com> wrote:
>
>I wondered if a straw poll could get some idea of readers' thoughts 
>about when they will be migrating to 3.0 on, so I used the new widget on 
>Blogger to add a poll for that.
>
>I'd appreciate if if you would go to
>
>   http://holdenweb.blogspot.com/
>
>and register your vote on your intended migration timescale.

Does this require JavaScript?  If yes, count me as another "no" vote on
your survey.  ;-)
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

The best way to get information on Usenet is not to ask a question, but
to post the wrong information.


From welcomestocontact at gmail.com  Wed Sep 19 06:11:48 2007
From: welcomestocontact at gmail.com (welcomestocontact at gmail.com)
Date: Wed, 19 Sep 2007 03:11:48 -0700
Subject: HTTP Protocol Client
Message-ID: <1190196708.261138.233490@e9g2000prf.googlegroups.com>

 Hi,

I am writing http protocol to get some data from servers. If i was
using my localhost, getting replay from local and if want access other
remote sites, i am getting error. Please reply it

My localhost client script:::

Code: ( python )


import httplib

h = httplib.HTTP('localhost',80)

h.putrequest('GET','')

h.putheader('User-Agent','Lame Tutorial Code')

h.putheader('Accept','text/html')

h.endheaders()

errcode,errmsg, headers = h.getreply()

print errcode,errmsg, headers


f = h.getfile() # Get file object for reading data

data = f.read()

print data

f.close()





the Reply getting from this::::


403 Forbidden Date: Tue, 18 Sep 2007 05:20:36 GMT

Server: Apache/2.0.52 (Red Hat)

Accept-Ranges: bytes

Content-Length: 3985

Connection: close

Content-Type: text/html; charset=UTF-8

And some Html script




If I want to access other sites:::


import httplib

h = httplib.HTTP('http://Google.com',80)

h.putrequest('GET','')

h.putheader('User-Agent','Lame Tutorial Code')

h.putheader('Accept','text/html')

h.endheaders()



errcode,errmsg, headers = h.getreply()

print errcode,errmsg, headers


f = h.getfile() # Get file object for reading data

data = f.read()

print data

f.close()


I got the error like:::

Traceback (most recent call last):
File "c.py", line 6, in ?
h.endheaders()
File "/usr/lib/python2.3/httplib.py", line 712, in endheaders
self._send_output()
File "/usr/lib/python2.3/httplib.py", line 597, in _send_output
self.send(msg)
File "/usr/lib/python2.3/httplib.py", line 564, in send
self.connect()
File "/usr/lib/python2.3/httplib.py", line 532, in connect
socket.SOCK_STREAM):
socket.gaierror: (-2, 'Name or service not known')


How can I access Remote sites using http protocol . I did'nt write
server script.


Thanks And Regards
Allavarapu



From mickey at disney.com  Mon Sep 10 21:12:13 2007
From: mickey at disney.com (Wiseman)
Date: Mon, 10 Sep 2007 21:12:13 -0400
Subject: Python Problem
References: <l404e316v2lknjsfrct9nlcs2jl9206qrf@4ax.com>
Message-ID: <0pqbe3t2hha91m4oiaesqrtpkspn7n6t4r@4ax.com>

Carsten.

I want to thank you for your help.  I could not check this until this
morning. Now that I checked your answer - THANK YOU. 
I do have 2 installations of Python on my machine. Once I called
Python with a full path - my program orked as expected.

Meir




From fd.calabrese at gmail.com  Sun Sep 16 05:56:04 2007
From: fd.calabrese at gmail.com (cesco)
Date: Sun, 16 Sep 2007 09:56:04 -0000
Subject: generate list of partially accumulated values
Message-ID: <1189936564.932553.148800@50g2000hsm.googlegroups.com>

Hi,

I have the following list:
l = [1, 2, 3, 4]
and I'd like to obtain a list like the following:
l_partial_sum = [1, 3, 6, 10] (that is [1, 1+2, 1+2+3, 1+2+3+4])

Is there a simple way to accomplish this?

I came up with the following solution but it seems a bit too
elaborated for the task:
l_partial_sum = [reduce(lambda x,y:x+y, sub_l) for sub_l in [l[:i+1]
for i in range(len(l))]]

Any help will be appreciated.

Thanks
Francesco



From steve at REMOVE-THIS-cybersource.com.au  Fri Sep 21 21:17:48 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sat, 22 Sep 2007 01:17:48 -0000
Subject: Would Anonymous Functions Help in Learning Programming/Python?
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
Message-ID: <13f8r9sj0b9q94e@corp.supernews.com>

On Fri, 21 Sep 2007 22:07:55 +0000, Cristian wrote:

> True, there is lambda, but that is very limited. It might be useful for
> key arguments, but not much else.

No, lambda is useful for anything that any other function is useful for, 
provided that you can write it as a single expression and not need to use 
statements. In other words, a lambda function can do anything anything 
any other function can, just less conveniently.

(To pick one example at random, you can use print with lambda:
http://northernplanets.blogspot.com/2006/07/python-using-print-with-lambda.html 
and while it is easy it isn't exactly convenient.)

And that's basically why function definitions have the syntax they do, 
because trying to hammer a multi-line function definition into a single 
expression is painful.


> It doesn't solve the teaching problem
> of "See, functions are just like any other data type. You can assign it
> to a variable." 


Is their interactive interpreter broken?


>>> def parrot(colour='red'):
...     return "I'm a parrot with %s plumage." % colour
...
>>> bird = parrot # note the lack of brackets
>>> type(bird)
<type 'function'>
>>> bird('green')
"I'm a parrot with green plumage."


Or using lambda:


>>> parrot = lambda colour: "I'm a parrot with %s plumage." % colour
>>> parrot("purple")
"I'm a parrot with purple plumage."



> It would be a footnote if it's mentioned at all. My hope
> is to subtly reinforce the notion that functions are data and can be
> passed around. The current function declaration doesn't help with this.

Some things just need to be learnt. I'm in favour of making languages 
easy for newbies to learn, but making function and method definitions 
harder to use just so newbies will be given a subtle reminder of 
something that 80% of them will never notice or use anyway is a bad 
trade-off.


> Creating a function and assigning it to a name is exactly what Python
> does, why not have it come out in the syntax? It's not necessary, yes,
> but I think it would be helpful for teaching purposes.

If people don't get it when you EXPLICITLY show them that functions are 
first-class objects, how do you expect them to notice it on their own 
based on the IMPLICIT similarities in syntax?




-- 
Steven.


From andrewthommo at gmail.com  Mon Sep 17 20:33:17 2007
From: andrewthommo at gmail.com (Andrew Thompson)
Date: Mon, 17 Sep 2007 17:33:17 -0700
Subject: Free trips around the globe!!!!!!!!!!
In-Reply-To: <1190055580.004195.87900@k79g2000hse.googlegroups.com>
References: <1190054010.350444.11150@19g2000hsx.googlegroups.com>
	<1190055580.004195.87900@k79g2000hse.googlegroups.com>
Message-ID: <1190075597.165511.127820@50g2000hsm.googlegroups.com>

On Sep 18, 4:59 am, lilly <oviedolill... at gmail.com> wrote:
> On Sep 17, 2:33 pm, nutsbreak... at gmail.com wrote:
>
> >http://world-traveling-destinations.SPAMpot.com/
>
> this is ..

..widely cross-posted *spam*.

[ F'Ups set to c.l.j.p. only. ]



From jjl at pobox.com  Sat Sep 22 03:20:25 2007
From: jjl at pobox.com (John J. Lee)
Date: Sat, 22 Sep 2007 07:20:25 GMT
Subject: An Editor that Skips to the End of a Def
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87odfxjgjy.fsf@pobox.com> <7x4phpt9nf.fsf@ruckus.brouhaha.com>
Message-ID: <87wsuj4152.fsf@pobox.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:

> jjl at pobox.com (John J. Lee) writes:
>> Seriously for a moment, I read something recently (maybe here?) about
>> an Apple study that claimed to show that people who perceived keyboard
>> bindings as being much faster than mouseing did not, on average, take
>> less time to complete the actions that were studied (they took more
>> time, in fact).  The plausible explanation for this was that people's
>> subjective perception of time is affected by the greater mental work
>> involved in typing (as opposed to mousing) for a given action.
>
> I think mousing takes more mental work than typing, and that's why it
> subjectively seems slower even if a stopwatch shows it to be faster.
[...]

I'm not sure this is a matter for debate, as much as physical
measurement.


John


From aisaac at american.edu  Mon Sep 10 10:52:25 2007
From: aisaac at american.edu (Alan Isaac)
Date: Mon, 10 Sep 2007 14:52:25 GMT
Subject: announcement: OpenOpt and GenericOpt
Message-ID: <JScFi.1038$Af1.441@trnddc06>

OpenOpt and GenericOpt
======================

Introducing two new optimization packages.
OpenOpt and GenericOpt are 100% Python
with a single dependency: NumPy.
For more detail see below and also
<URL:https://projects.scipy.org/scipy/scikits/wiki/Optimization>

OpenOpt
-------

OpenOpt is new open source optimization framework.
OpenOpt is released under the BSD license.

The primary author and current maintainer of
OpenOpt is Dmitrey Kroshko <email:openopt AT ukr.net>
(Optimization Department, Cybernetics Institute, Ukrainian Science Academy)

OpenOpt goal: provide an open source alternative
to TomOpt TOMLAB (optimization framework for MATLAB)
and related optimization frameworks.  Currently OpenOpt
offers connections to a variety of open source solvers,
primarily for unconstrained optimization. (See below.)

OpenOpt provides provides connections a vraity of solvers,
including those in GenericOpt, which are included.
(Users will need to download other solvers;
we provide URLs for the downloads.)


GenericOpt
----------

GenericOpt is a toolkit for building specialized optimizers.
GenericOpt is released under the BSD license.

The primary author and current maintainer of GenericOpt is
Matthieu Brucher <email:matthieu.brucher AT gmail.com>

GenericOpt goal: provide an open source, extensible
toolit for "component-wise" construction of specialized
optimizers.  GenericOpt allows users who want detailed control to construct
their own solvers by choosing among a variety of algorithm components
(currently, most choices are among step and line-search algorithms.)

Usage: see Matthieu Brucher's tutorial 
<URL:https://projects.scipy.org/scipy/scikits/wiki/Optimization/tutorial>.  

Limitation: currently GenericOpt provides only unconstrained solvers. 

SciKits
-------

The SciPy project is developing a collection of open source packages for
scientific computing which are allowed to have more dependencies and
more varied licenses than those allowed for SciPy proper.
In contrast to SciPy, the related scikits may host any 
OSI-approved licensed code.  See
<URL:https://projects.scipy.org/scipy/scikits/>

OpenOpt and GenericOpt are available together as a
SciPy scikit.  The provides a unified optimization
framework along with a collection of solvers.
However, neither depends on the other.


OpenOpt Details
---------------

Key feature: a unified calling interface for all solvers,
a variety of pure Python solvers, and connections to 
numerous external solvers.

Example::

    from scikits.openopt import NLP
    p = NLP(lambda x: (x-1)**2, 4)
    r = p.solve('ralg')

In this example,
the objective function is (x-1)^2,
the start point is x0=4,
and 'ralg' specifies the name of solver involved.

See much more detailed example here 
<URL:http://projects.scipy.org/scipy/scikits/browser/trunk/openopt/scikits/openopt/examples/nlp_ALGENCAN.py> 




OpenOpt Connected External Solvers
----------------------------------

Non-linear problems (NLP)
~~~~~~~~~~~~~~~~~~~~~~~~~

- ALGENCAN <http://www.ime.usp.br/%7Eegbirgin/tango/py.php> 
  (GPL)
- lincher (BSD) (all types of constraints and 1st derivatives),
- ralg (BSD) (currently unconstrained only)
- scipy_tnc and scipy_lbfgsb (box-bounded, requires scipy 
  installed, BSD)

Non-smooth problems (NSP)
~~~~~~~~~~~~~~~~~~~~~~~~~

- ralg (BSD)
- ShorEllipsoid (BSD)
  (for small-scale problems with nVars = 1..10, former for 
  medium-scaled problems with nVars = 1...1000, requires r0)
  
Both are unconstrained for now.


Linear problems (LP)
~~~~~~~~~~~~~~~~~~~~

- lp_solve <http://sourceforge.net/projects/lpsolve> (LGPL)
- glpk <http://www.gnu.org/software/glpk/> (GPL)
- CVXOPT <http://www.ee.ucla.edu/%7Evandenbe/cvxopt/> (GPL) 
  (currently glpk requires CVXOPT installed)


Mixed-integer problems (MILP)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

- lp_solve <http://sourceforge.net/projects/lpsolve> 


Quadratic problems (QP)
~~~~~~~~~~~~~~~~~~~~~~~
- CVXOPT <http://www.ee.ucla.edu/%7Evandenbe/cvxopt/> (GPL) 
  (please note - NLP lincher solver requires QP solver, and 
  the only one for now is CVXOPT one)

Here you can look at examples for NLP 
<http://projects.scipy.org/scipy/scikits/browser/trunk/openopt/scikits/openopt/examples/nlp_1.py>, 
NSP 
<http://projects.scipy.org/scipy/scikits/browser/trunk/openopt/scikits/openopt/examples/nsp_1.py>, 
QP 
<http://projects.scipy.org/scipy/scikits/browser/trunk/openopt/scikits/openopt/examples/qp_1.py>, 
LP 
<http://projects.scipy.org/scipy/scikits/browser/trunk/openopt/scikits/openopt/examples/lp_1.py>, 
MILP 
<http://projects.scipy.org/scipy/scikits/browser/trunk/openopt/scikits/openopt/examples/milp_1.py> 


Acknowledgements
================

Development of OpenOpt was supported by Google through the 
Google Summer of Code (GSoC) program, with Alan G. Isaac
as mentor.  Additonal mentorship was provided by Jarrod Milman. 
Debts to the SciPy community are many, but we would particularly
like to thank Nils Wagner.


Appeal
======

The primary author and current maintainer of OpenOpt is Dmitrey Kroshko.  The
primary author and current maintainer of GenericOpt is Matthieu Brucher.  These
packages are already functional and extensible, but both would profit from
additional intensive development.  This will require sponsorship, especially
for substantial additions to OpenOpt. The use of Python for scientific
programming is only nascent in the Ukraine, so really an outside sponsor is
needed.  Ideas or leads are very welcome.



From saptarshi.guha at gmail.com  Thu Sep 20 20:59:13 2007
From: saptarshi.guha at gmail.com (sapsi)
Date: Thu, 20 Sep 2007 17:59:13 -0700
Subject: Python,SWIG and libjvm
In-Reply-To: <1190334123.039404.318860@d55g2000hsg.googlegroups.com>
References: <1190329236.398635.226020@y42g2000hsy.googlegroups.com>
	<1190334123.039404.318860@d55g2000hsg.googlegroups.com>
Message-ID: <1190336353.243711.166640@d55g2000hsg.googlegroups.com>

On Sep 20, 8:22 pm, sapsi <saptarshi.g... at gmail.com> wrote:
> On Sep 20, 7:00 pm, sapsi <saptarshi.g... at gmail.com> wrote:
>
> > Hello,
> > I'm not sure if this the correct list but here goes (and sorry for the
> > noise). I've been attempting to wrap python around libhdfs.
> > So far so good (
>
> I should point out that libhdfs is a c library to Hadoop Distributed
> FileSystem.
> Thank you
> Saptarshi

Hmm,here goes, you need -Wl,--rpart -Wl,path-to-jvm in the LDFLAGS in
the compile process.
HTH
Saptarshi



From saptarshi.guha at gmail.com  Sat Sep  8 16:25:59 2007
From: saptarshi.guha at gmail.com (sapsi)
Date: Sat, 08 Sep 2007 13:25:59 -0700
Subject: Using struct timeval in python
In-Reply-To: <mailman.279.1189279579.2658.python-list@python.org>
References: <1189273504.153216.60470@22g2000hsm.googlegroups.com>
	<mailman.279.1189279579.2658.python-list@python.org>
Message-ID: <1189283159.646802.34680@g4g2000hsf.googlegroups.com>

The timedelta module did the job just fine.
Thank you




From cjw at sympatico.ca  Mon Sep 17 20:15:44 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Mon, 17 Sep 2007 20:15:44 -0400
Subject: Use GUI for Python
In-Reply-To: <1190044523.666991.273910@y42g2000hsy.googlegroups.com>
References: <1190043073.093736.272750@k79g2000hse.googlegroups.com>
	<1190044523.666991.273910@y42g2000hsy.googlegroups.com>
Message-ID: <46EF18B0.1060505@sympatico.ca>

Jason wrote:
> On Sep 17, 9:31 am, kou... at hotmail.com wrote:
>> I am new to python as I have been a VB programmer.  I am used to the
>> GUI interface, and was wondering if I had to choose between a GUI for
>> Python, which one should I go with?  Thanks.
>>
>> Kou
> 
> You need to be more specific.  Do you mean that you are used to
> working in an IDE environment, where you can readily access the list
> of classes, methods, and such?  You might be interested in Eclipse
> [1], then installing the PyDev [2] plug-in to add Python support.
> Wing-IDE [3] and Komodo [4] may also be very suitable (but they cost
> money).
> 
> If you mean that you want to develop programs with a GUI interface,
> then you have a number of choices [5].  Most of these choices do not
> work in the same way that Microsoft Studio's GUI designer works,
> partly because Python isn't tied to any of them.
>   o  wxWidgets is MFC-like
>   o  PyQT and PyGTK are similar to their underlying interfaces
>   o  Tkinter comes with the default Python install, and provides the
> Tk widget set
>   o  With IronPython, you can access the regular Microsoft .NET GUIs
>   o  PythonCard and EasyGUI are supposed to be pretty easy GUIs to use
>   o  Dabo is a full-on database/GUI/platform set to easy cross-
> platform GUI and database programming.
> 
> The links to all those can be found at link [5]. Don't be afraid if
> the choices are overwhelming. You have choices.  I highly recommend
> that you learn Python first, then examine the different GUI systems,
> keeping in mind any requirements you may have and your previous
> experience.
> 
> [1] http://www.eclipse.org/
> [2] http://pydev.sourceforge.net/
> [3] http://wingware.com/
> [4] http://www.activestate.com/products/komodo_ide/
> [5] http://wiki.python.org/moin/GuiProgramming
> 
If you are looking for a good IDE and you are in the Windows World,
have a look at PyScripter.  It is in development and the developer
gives an excellent response to any queries or potential bugs.

Colin W.


From kay.schluehr at gmx.net  Fri Sep  7 00:19:26 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Thu, 06 Sep 2007 21:19:26 -0700
Subject: Any syntactic cleanup likely for Py3? And what about doc
	standards?
In-Reply-To: <1189076186.590996.190380@o80g2000hse.googlegroups.com>
References: <mailman.108.1189018988.2658.python-list@python.org>
	<1189076186.590996.190380@o80g2000hse.googlegroups.com>
Message-ID: <1189138766.283313.113690@50g2000hsm.googlegroups.com>

On Sep 6, 12:56 pm, Paul Boddie <p... at boddie.org.uk> wrote:

> I think there's been a widespread "kitchen sink" mentality around the
> Python language for some time, which is where the multimethods
> proposal, amongst others, fits in here.

Maybe that's one of two fixed points in the evolution of a programming
language? The other one might be an almost non-designed and small
language with a vast and flat library a la PHP and Zend. Apparently
even Scheme moves into the kitchen sink today with the new R6RS
specification.

Python is going to be the-right-thing with abandoning the print
statement or making lists a bit more monotyped with a type aware sort.
The worse-is-better philosophy on the other hand is  indifferent
towards stylistic consistency and equipped with less nominalistic
pedantry ( "this is a list and therefore you only have to use it as a
list and not as a multiset..." ).

This explains also the lack of interest into the std library which
will be reduced to CPython services and basic datatypes. But there are
also organizational issues and I don't even think that a lib that
provides applications and domain specific services has to be
necessarily maintained and approved by python-dev. I'd go even further
and contend that's one of the issues where a rather large community
such as Pythons could grow up and set code review standards ( and I
mean *manual* code reviews of conscientous readers. I don't mean
cheesecake or up(down)moddings in Web 2.0 style, implementing the
"wisdom of the crowd" ). I can even live with Eggs and a not-so-common
code base but not with low quality.




From nospam at non.com  Fri Sep 14 14:42:56 2007
From: nospam at non.com (=?iso-8859-1?b?cultaQ==?=)
Date: Fri, 14 Sep 2007 18:42:56 GMT
Subject: Rename multiple files using names in a text file
Message-ID: <QCAGi.159$cz3.82@nntpserver.swip.net>

Hi,

I would like to rename files (jpg's ones) using a text file containing the
new names...
Below is the code that doesn't work :
*****
#!/usr/bin/python
#-*- coding: utf-8 -*-
from os import listdir, getcwd, rename
import re
list_names=['new_name1','new_name2']
list_files = listdir(getcwd())
filtre = re.compile("jpg$", re.IGNORECASE) 
list_jpg = filter(filtre.search, list_files)
#strip all element of list list_jpg
list_jpg_strip=[]
for nom in list_jpg:
	#print nom.strip()
	list_jpg_strip.append(nom.strip())
#let's rename :
i=0
while i <= len(list_jpg_strip):
	rename(list_jpg_strip[i],list_names[i])
	i=i+1
****
The error message is :
File "ecm.py", line 17, in <module>
    rename(list_jpg_strip[i],list_names[i])
OSError: [Errno 2] No such file or directory
and all files exists, I checked it hundred times ! :-s
Do you have a clue ?
Thanks a lot.
R?mi.


From neoedmund at gmail.com  Mon Sep 10 05:30:04 2007
From: neoedmund at gmail.com (neoedmund)
Date: Mon, 10 Sep 2007 09:30:04 -0000
Subject: unexpected behavior: did i create a pointer?
In-Reply-To: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>
References: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>
Message-ID: <1189416604.902880.24370@g4g2000hsf.googlegroups.com>

On Sep 7, 4:07 pm, gu <pistacc... at gmail.com> wrote:
> hi to all!
> after two days debugging my code, i've come to the point that the
> problem was caused by an unexpected behaviour of python. or by lack of
> some information about the program, of course! i've stripped down the
> code to reproduce the problem:
>
> <code>
> a = {}
>
> for x in range(10):
>      for y in range(10):
>          a[x,y] = "0"
>
> copyOfA = a
>
> def functionA(x,y):
>      print a[x,y],
>      copyOfA[x,y] = "*"
>      print a[x,y],copyOfA[x,y]
>
> for x in range(10):
>      for y in range(10):
>          functionA(x,y)
>
> </code>
>
> now, in the second "for" cycle and in functionA() i only 'touch' copyOfA
> (altering it). as i don't touch the variable "a", i expect it not to be
> affected by any change, but copyOfA acts like a pointer to a and
> altering copyOfA's values result in altering the values of "a", so the
> result that i expect is:
> 0 0 *
> 0 0 *
> 0 0 *
> 0 0 *
> [..]
>
> but i get:
> 0 * *
> 0 * *
> 0 * *
> 0 * *
> [..]
>
> what's going on?
> thanks in advance.

no language act like want you tought, or the assignment operation will
be too expensive.



From arkanes at gmail.com  Thu Sep 20 10:58:03 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 20 Sep 2007 09:58:03 -0500
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
In-Reply-To: <7x1wctwg6x.fsf@ruckus.brouhaha.com>
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<dea92f560709021735l2c72d53ew94410fcb33b9b50b@mail.gmail.com>
	<mailman.303.1188779927.28954.python-list@python.org>
	<1190164166.378500.155990@o80g2000hse.googlegroups.com>
	<1190241711.344058.238380@57g2000hsv.googlegroups.com>
	<1190242799.954176.279440@22g2000hsm.googlegroups.com>
	<7xps0ew0a8.fsf@ruckus.brouhaha.com>
	<13f3roj6gdfq6b7@corp.supernews.com>
	<7x1wctwg6x.fsf@ruckus.brouhaha.com>
Message-ID: <4866bea60709200758o21d76483mb7f16d744ebc3f80@mail.gmail.com>

On 20 Sep 2007 07:43:18 -0700, Paul Rubin
<"http://phr.cx"@nospam.invalid> wrote:
> Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> writes:
> > That's why your "comparatively wimpy site" preferred to throw extra web
> > servers at the job of serving webpages rather than investing in smarter,
> > harder-working programmers to pull the last skerricks of performance out
> > of the hardware you already had.
>
> The compute intensive stuff (image rendering and crunching) has
> already had most of those skerricks pulled out.  It is written in C
> and assembler (not by us).  Only a small part of our stuff is written
> in Python: it just happens to be the part I'm involved with.
>

That means that this part is also unaffected by the GIL.

> > But Python speed ups don't come for free. For instance, I'd *really*
> > object if Python ran twice as fast for users with a quad-core CPU, but
> > twice as slow for users like me with only a dual-core CPU.
>
> Hmm.  Well if the tradeoff were selectable at python configuration
> time, then this option would certainly be worth doing.  You might not
> have a 4-core cpu today but you WILL have one soon.
>
> > What on earth makes you think that would be anything more than a
> > temporary, VERY temporary, shutdown? My prediction is that the last of
> > the machines wouldn't have even been unplugged
>
> Of course that example was a reductio ad absurdum.  In reality they'd
> use the speedup to compute 2x as much stuff, rather than ever powering
> any servers down.  Getting the extra computation is more valuable than
> saving the electricity.  It's just easier to put a dollar value on
> electricity than on computation in an example like this.  It's also
> the case for our specfiic site that our server cluster is in large
> part a disk farm and not just a compute farm, so even if we sped up
> the software infinitely we'd still need a lot of boxes to bolt the
> disks into and keep them spinning.
>

I think this is instructive, because it's pretty typical of GIL
complaints. Someone gives an example where the GIL is limited, but
upon inspection it turns out that the actual bottleneck is elsewhere,
that the GIL is being sidestepped anyway, and that the supposed
benefits of removing the GIL wouldn't materialize because the problem
space isn't really as described.

> > Now there's a thought... given that Google:
> >
> > (1) has lots of money;
> > (2) uses Python a lot;
> > (3) already employs both Guido and (I think...) Alex Martelli and
> > possibly other Python gurus;
> > (4) is not shy in investing in Open Source projects;
> > (5) and most importantly uses technologies that need to be used across
> > multiple processors and multiple machines
> >
> > one wonders if Google's opinion of where core Python development needs to
> > go is the same as your opinion?
>
> I think Google's approach has been to do cpu-intensive tasks in other
> languages, primarily C++.  It would still be great if they put some
> funding into PyPy development, since I think I saw something about the
> EU funding being interrupted.
> --

At the really high levels of scalability, such as across a server
farm, threading is useless. The entire point of threads, rather than
processes, is that you've got shared, mutable state. A shared nothing
process (or Actor, if you will) model is the only one that makes sense
if you really want to scale because it's the only one that allows you
to distribute over machines. The fact that it also scales very well
over multiple cores (better than threads, in many cases) is just
gravy.

The only hard example I've seen given of the GIL actually limiting
scalability is on single server, high volume Django sites, and I don't
think that the architecture of those sites is very scalable anyway.


From arne at vajhoej.dk  Sun Sep 30 17:03:15 2007
From: arne at vajhoej.dk (=?UTF-8?B?QXJuZSBWYWpow7hq?=)
Date: Sun, 30 Sep 2007 17:03:15 -0400
Subject: which language allows you to change an argument's value?
In-Reply-To: <P3MLi.10035$ZA.6750@newsb.telia.net>
References: <1191149233.346818.246170@22g2000hsm.googlegroups.com>
	<P3MLi.10035$ZA.6750@newsb.telia.net>
Message-ID: <47000ed3$0$90272$14726298@news.sunsite.dk>

Erik Wikstr?m wrote:
>> their reference (alias) mechanism.  And C, Python, and Ruby probably
>> won't let you do that.  What about Java and Perl?
> 
> C will let you do it with pointers (it is just a syntactical difference
> from references in this case) and Java's references allows it.

Neither C or Java has call by reference.

C pointers and Java references may work similarly in most cases
but it is still call by value.

>                                                                I do not
> know about Ruby, Python and Perl, but (AFAIK) the all have OO support so
> I would be surprised if they used purely value semantics.

I can not see why OO should indicate anything about call by reference
support.

>> isn't "what i pass in, the function can modify it" not a desireable
>> behavior if i am NOT passing in the address of my argument?  For one
> 
> Being able to pass the actual object instead of a copy is highly
> desirable for two reasons. In most languages only one return value is
> allowed for a function so the ability to change parameters allows you to
> artificially return more without having to wrap them in constructs. The
> second reason is that for large objects the performance hit of having to
> create a copy each time you call a function can be forbidding.

Usually it is not a good thing, because it makes the code much
more difficult to read.

But sometimes it is handy.

I think C# got it right.

It allows it but require an explicit marking of it in both formal
argument list and actual argument list.

>> Java, Python, and Ruby, and we pass in a reference to object (not C+
>> +'s meaning of alias reference)
> 
> In what way does the C++ reference differ from those in Java, Python,
> and Ruby in this situation?

C++ and Java are very different in this aspect.

Arne


From mail at timgolden.me.uk  Tue Sep 11 10:55:03 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Tue, 11 Sep 2007 15:55:03 +0100
Subject: Minor documentation bug
In-Reply-To: <1189518490.939985.101460@g4g2000hsf.googlegroups.com>
References: <1189518490.939985.101460@g4g2000hsf.googlegroups.com>
Message-ID: <46E6AC47.8030204@timgolden.me.uk>

Frank Millman wrote:
> I spotted a minor bug in the documentation to SimpleXMLRPCServer. It
> does not seem worth getting a login to the bugtracker just to enter
> this, so if it is confirmed as a bug perhaps someone would be so kind
> as to enter it for me.

Frank, please do take the trouble to enter this. With the
new roundup bugtracker, it's *really easy* to get a login.

http://bugs.python.org

TJG


From carsten at uniqsys.com  Mon Sep 24 07:55:35 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 24 Sep 2007 07:55:35 -0400
Subject: Almost There - os.kill()
In-Reply-To: <E4C7BCAB1872014F81CEAACD25699B8C0849A8@301081ANEX2.global.avaya.com>
References: <E4C7BCAB1872014F81CEAACD25699B8C0849A8@301081ANEX2.global.avaya.com>
Message-ID: <1190634935.3385.36.camel@dot.uniqsys.com>

On Mon, 2007-09-24 at 19:48 +0800, Delaney, Timothy (Tim) wrote:
> Always be careful with int() incase any of the values have a leading
> zero - check the documentation for int() carefully.

Why would leading zeroes be a problem?

>>> int("10")
10
>>> int("010")
10
>>> int("0010")
10
>>> int("00010")
10

Maybe you're thinking of "evil eval?"

>>> eval("10")
10
>>> eval("010")
8

-- 
Carsten Haese
http://informixdb.sourceforge.net




From wink at saville.com  Wed Sep 26 11:18:32 2007
From: wink at saville.com (wink)
Date: Wed, 26 Sep 2007 08:18:32 -0700
Subject: Asynchronous Messaging
In-Reply-To: <1190807252.731074.141450@k79g2000hse.googlegroups.com>
References: <1190807252.731074.141450@k79g2000hse.googlegroups.com>
Message-ID: <1190819912.344267.52680@50g2000hsm.googlegroups.com>

On Sep 26, 4:47 am, wink <w... at saville.com> wrote:
To make it easier to comment on the code, I'm including
"mproc.py" file below. Fredrik, was commenting about using
Queue and in fact I do. Queue is quite nice and is also
thread safe, which is a requirement for this implementation.
But its performance is poor if the number of items on a
Queue becomes large because it is implemented using a list.

One of the things I was thinking of was doing another implementation
using of Queue which was based on deque.


"""Message Processor Module.

This modules allows programmers to create compnents
which communicate asynchronously via messages. In
addition the receiving component is will only handle
one message at a time. This allows the programmer to
create multi-threaded program with fewer shared memory
thus fewer mutex's and semaphore's.

The basic communication is via an instance of the
Msg class which is sent to mproc's using the send
method. An Mproc is an active component which has a
thread and executes asynchronously from all other
Mproc's by using one MprocDriver for each Mproc. It
is also possible for several mproc's to share one
MprocDriver by using BaseMproc.

Each mproc must override the _handler method. When a
message arrives for a mproc is it placed in a Queue
and the driver calls the _handler method passing the
Msg as a parameter. The driver uses the Queue to
serialize the message processing, thus the _handler
method will be invoked with one message at a time.
Thus the _handler method does not generally need to
use mutex's or semaphore's. But because each message's
processing must be completed before the next message
will be started it is important that the message be
processed as quickly as possible.

Add more documentation."""

import copy
import threading
import Queue
import traceback

class Msg:
    """A message"""

    def __init__(self):
        """Initializer"""
        self.dstMpId = None
        self.dstCnId = None
        self.srcMpId = None
        self.srcCnId = None
        self.mid = None
        self.cmd = None
        self.tag = None
        self.status = None
        self.data = None

    def dup(self):
        """Duplicate the message"""
        msgCopy = copy.deepcopy(self)
        return msgCopy

    def send(self):
        """Send a message.

        Returns True if the message was started on its way"""

        try:
            MprocDriver._mpList[self.dstMpId]._msgQueue.put(self)
            return True
        except:
            return False

class BaseMproc:
    """Message Processor.

    A message processor requires a handler method and another
    driver which passes messages to it. This mproc driver has
    one overriding requirement, it must only pass one message at
    a time to the handler method. This eliminates any need for
    the programmer to worry about multi-threading issues while
    processing messages.

    This does put a burden on the handler routine, it must process
    messages quickly and in a non-blocking fashion so that the
    mproc may remain lively.

    The name of an BaseMproc must be unique, an exception is thrown
    if the name is already used."""

    def __init__(self, name, mprocDriver):
        """Initializer"""
        self.name = name
        addMproc(self, mprocDriver)

    def close(self):
        """Close the mproc"""
        #print "BaseMproc.close: ", self.name
        try:
            rmvMproc(self)
        except:
            #print "BaseMproc.close: excption"
            traceback.print_exc()
            self._unreg()

    def _handler(self):
        """Override this routine."""
        raise Exception("BaseMproc._handler needs to be overridden")

    def _reg(self, mprocDriver, id):
        """Register the mproc driver for this mproc"""
        self._mprocDriver = mprocDriver
        self._msgQueue = mprocDriver._msgQueue
        self.id = id

    def _unreg(self):
        """Unregister the mproc driver for this mproc"""
        self._mprocDriver = None
        self._msgQueue = None
        self.id = None

class Mproc(BaseMproc):
    """Active Message Processor.

    An active message processor isa BaseMproc but it always creates a
    MprocDriver instance as its driver"""

    def __init__(self, name):
        """Initializer"""
        BaseMproc.__init__(self, name,
MprocDriver("ActiveMprocDriver_" + name))

    def close(self):
        """Close the active mproc"""
        try:
            this_mprocDriver = self._mprocDriver
            BaseMproc.close(self)
            this_mprocDriver.close()
        except:
            print "Mproc.close: excption"
            traceback.print_exc()
            self._unreg()

class MprocDriver(threading.Thread, BaseMproc):
    """Message processor driver."""
    _mpList = []
    _mpDict = {}

    def __init__(self, name):
        """Initializer"""

        self._thisMpdDict = {}
        self._running = True
        self._msgQueue = Queue.Queue()

        threading.Thread.__init__(self)
        BaseMproc.__init__(self, name, self)

        self.start()

    def _regMproc(self, mproc, id):
        self._thisMpdDict[mproc.name] = mproc
        mproc._reg(self, id)

    def _unregMproc(self, mproc):
        #print "%s._unregMproc(%s):" % (self.name, mproc.name)
        del self._thisMpdDict[mproc.name]
        mproc._unreg()

    def _handler(self, msg):
        if (msg.mid == -1) and (msg.cmd == 0):
            self._running = False
            msg.completeQ.put(0)

    def close(self):
        """Close the mproc driver"""

        # Remove all mprocs related to this MprocDriver?????
        mprocs = self._thisMpdDict.values()
        for mproc in mprocs:
            if (mproc.name != self.name):
                rmvMproc(mproc)

        completeQ = Queue.Queue()
        msg = Msg()
        msg.dstMpId = self.id
        msg.mid = -1
        msg.cmd = 0
        msg.completeQ = completeQ
        msg.send()
        completeQ.get()

        # Remove ourself
        BaseMproc.close(self)
        del self._thisMpdDict

    def run(self):
        while (self._running):
            try:
                msg = self._msgQueue.get()
                mproc = MprocDriver._mpList[msg.dstMpId]
                mproc._handler(msg)
            except:
                if msg == None:
                    print "run: no message"
                elif mproc == None:
                    print "run: no mproc"
                elif not callable(mproc._handler):
                    print "run: mproc._handler is not callable"
                else:
                    print "run: mproc._handler caused an exception"
                    traceback.print_exc()

class PsMgr:
    """Publish Subscribe Manager.

    Allow mprocs to subscribe to any message having
    a specified mid/cmd.

    Maybe this should be in a separte module and instead
    of using class variables?
    """

    midDict = {}

    @classmethod
    def publish(self, msg):
        """Send the message to all subscribers"""
        pass

    @classmethod
    def subscribe(self, mproc, mid, cmd):
        """Subscribe the mproc to messages with mid/cmd"""
        self.publish = PsMgr._publish
        self.subscribe = PsMgr._subscribe
        self.unsubscribe = PsMgr._unsubscribe
        self.subscribe(mproc, mid, cmd)

    @classmethod
    def unsubscribe(self, mproc, mid, cmd):
        """Unsubscirve the mproc"""
        pass

    @classmethod
    def _publish(self, msg):
        """The actual publish routine where there is one or more
subscribers"""
        try:
            #print "_publish: msg.mid=%d msg.cmd=%d" % (msg.mid,
msg.cmd)
            subscribers = self.midDict[msg.mid][msg.cmd]
        except KeyError:
            #print "_publish: error no subscribers for msg.mid=%d
msg.cmd=%d" % (msg.mid, msg.cmd)
            pass
        else:
            for mproc in subscribers:
                msgNew = msg.dup()
                #print "_public mid=%d cmd=%d to %s" % (msgNew.mid,
msgNew.cmd, mproc.name) #, mproc.id)
                msgNew.dstMpId = mproc.id
                msgNew.send()

    @classmethod
    def _subscribe(self, mproc, mid, cmd):
        """The actual subscribe routine"""
        #print "_subscribe: add mproc %s for mid=%d cmd=%d" %
(mproc.name, mid, cmd)
        cmdDict = self.midDict.get(mid, {})
        subscribers = cmdDict.get(cmd, [])
        subscribers.append(mproc)
        cmdDict[cmd] = subscribers
        self.midDict[mid] = cmdDict

    @classmethod
    def _unsubscribe(self, mproc, mid, cmd):
        """The actual unsubscribe routine when there is one or more
subscribers"""
        #print "_unsubscribe: remove mproc %s for mid=%d cmd=%d" %
(mproc.name, mid, cmd)
        cmdDict = self.midDict.get(mid, {})
        subscribers = cmdDict.get(cmd, [])

        delList = []
        count = 0
        for mp in subscribers:
            if mp == mproc:
                delList.append(count)
            count += 1
        l = len(delList)
        for x in xrange(l-1, -1, -1):
            del subscribers[delList[x]]

        if len(self.midDict) == 0:
            self.publish = PsMgr.publish
            self.subscribe = PsMgr.subscribe
            self.unsubscribe = PsMgr.unsubscribe

def lookupMproc(name, onNotFound=None):
    """Lookup an message processor"""
    try:
        #print "lookupMproc: %s dict=%s" % (name, MprocDriver._mpDict)
        mproc = MprocDriver._mpDict[name]
    except: # Add not found exception?
        #print "lookupMproc: NOT FOUND", name
        mproc = onNotFound
    return mproc

def addMproc(mproc, mprocDriver):
    """Add a new message processor to the database"""
    if (lookupMproc(mproc.name) != None):
        raise NameError("%s BaseMproc already exists" % mproc.name)

    #print "addMproc:", mproc.name
    MprocDriver._mpList.append(mproc)
    MprocDriver._mpDict[mproc.name] = mproc
    #print "addMproc: dict=", MprocDriver._mpDict

    id = MprocDriver._mpList.index(mproc)
    mprocDriver._regMproc(mproc, id)

def rmvMproc(mproc):
    """Remove message processor from the database"""
    #print "rmvMproc:", mproc.name
    MprocDriver._mpList[mproc.id] = None
    del MprocDriver._mpDict[mproc.name];
    #print "rmvMproc: dict=", MprocDriver._mpDict
    mproc._mprocDriver._unregMproc(mproc)




From alexandre.badez at gmail.com  Wed Sep  5 09:34:42 2007
From: alexandre.badez at gmail.com (Alexandre Badez)
Date: Wed, 05 Sep 2007 13:34:42 -0000
Subject: Multi Heritage with slots
In-Reply-To: <1188996990.810829.122910@w3g2000hsg.googlegroups.com>
References: <1188982916.071976.160170@g4g2000hsf.googlegroups.com>
	<op.tx6f02mvwepdt4@ericb.pragmadev>
	<1188994956.570845.269250@w3g2000hsg.googlegroups.com>
	<mailman.81.1188996727.2658.python-list@python.org>
	<1188996990.810829.122910@w3g2000hsg.googlegroups.com>
Message-ID: <1188999282.387338.173880@o80g2000hse.googlegroups.com>

On Sep 5, 2:56 pm, Michele Simionato <michele.simion... at gmail.com>
wrote:
> On Sep 5, 2:52 pm, "Simon Brunning" <si... at brunningonline.net> wrote:
>
> > On 9/5/07, Alexandre Badez <alexandre.ba... at gmail.com> wrote:
>
> > > I use __slots__ not for memory optimization nor doing java.
> > > I use __slots__ because my class are used by other lib, and in the
> > > past, some of them misspell some attributes and involved a very
> > > annoying comportment of the global application.
> > > So the objective is only to prevent unwanted dynamism (but not in all
> > > the application, just some class).
>
> > Using slots to prevent the creation of new properties is what Eric
> > *means* by "doing java". You're trying to write Java style code in
> > Python, and it's not going to be pretty. Slots are not intended for
> > this purpose, and they aren't very good for it.
>
> Right, and this the way to do what the original poster wants:
>
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/252158
>
>                   Michele Simionato

Thanks every body for your remarks.
I still have a lot to learn in python...



From steve at holdenweb.com  Fri Sep 28 16:09:26 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 28 Sep 2007 16:09:26 -0400
Subject: Python 3.0 migration plans?
In-Reply-To: <1191009608.985644.271160@50g2000hsm.googlegroups.com>
References: <1191002679.569709.16870@22g2000hsm.googlegroups.com>	<mailman.1242.1191003389.2658.python-list@python.org>	<1191005906.556751.261940@22g2000hsm.googlegroups.com>	<5m51l4Fbao07U2@mid.uni-berlin.de>	<1191007754.740566.137510@n39g2000hsh.googlegroups.com>	<1191008702.579795.141180@r29g2000hsg.googlegroups.com>
	<1191009608.985644.271160@50g2000hsm.googlegroups.com>
Message-ID: <fdjn1m$m58$3@sea.gmane.org>

TheFlyingDutchman wrote:
> On Sep 28, 12:45 pm, George Sakkis <george.sak... at gmail.com> wrote:
>> On Sep 28, 3:29 pm, TheFlyingDutchman <zzbba... at aol.com> wrote:
>>
>>> One issue I have with this group and that I encountered many years ago
>>> in the Perl group is that there is no separate group
>>> comp.lang.python.beginner where you can ask questions without getting
>>> hit with RTFM! and the like.
>> Which shows once again that you're trying to break the world record of
>> being wrong in as many sentences as possible:
>>
>>    http://mail.python.org/mailman/listinfo/tutor
>>
>> You would do yourself (and others) a favor by migrating there for a
>> few weeks or months.
>>
>> George
> 
> Being in a land where every nit can be picked, I am surprised that you
> offered up a mailing list when I was asking for a newsgroup.
> 
That's because the tutor list doesn't offer a newsgroup. He was probably 
just trying to get rid of you.

Now at 98.75% ...

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From steve at holdenweb.com  Fri Sep 14 02:54:09 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 14 Sep 2007 02:54:09 -0400
Subject: "once" assigment in Python
In-Reply-To: <1189750616.597409.85380@w3g2000hsg.googlegroups.com>
References: <1189750616.597409.85380@w3g2000hsg.googlegroups.com>
Message-ID: <fcdb6j$2u0$1@sea.gmane.org>

Lorenzo Di Gregorio wrote:
> Hello,
> 
> I've been using Python for some DES simulations because we don't need
> full C speed and it's so much faster for writing models.  During
> coding I find it handy to assign a variable *unless it has been
> already assigned*: I've found that this is often referred to as "once"
> assigment.
> 
> The best I could come up with in Python is:
> 
> try:
>   variable
> except NameError:
>   variable = method()
> 
> I wonder if sombody has a solution (trick, whatever ...) which looks
> more compact in coding.  Something like:
> 
> once(variable, method)
> 
> doesn't work, but it would be perfect.  Of course I can preprocess the
> Python code but an all-Python solution would be more handy.
> 
> Any suggestions?
> 
Without being fatuous, I would suggest you rethink your approach to the 
problem.

Do your variables have default values? If not, what happens if the user 
does not set them and your code tries to refer to them? You seem to be 
trying to apply defaults if the user hasn't set a value, when the 
correct things to do is to apply the defaults *before the user gets a 
chance to do anything at all*. Then any changes made by the user will 
overwrite the defaults.

Even better, if its practical, is to provide your functionality as one 
or more functions, whose definitions can set default values for keyword 
arguments.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From fakeaddress at nowhere.org  Thu Sep 27 05:05:02 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Thu, 27 Sep 2007 09:05:02 GMT
Subject: Load balancing and passing sockets; was:  Re: Google and Python
In-Reply-To: <mailman.1148.1190875995.2658.python-list@python.org>
References: <1190228512.627109.308910@n39g2000hsh.googlegroups.com><ufadnRC5BPZm6GzbnZ2dnUVZ_jOdnZ2d@comcast.com><1190231094.276099.136250@22g2000hsm.googlegroups.com><mailman.781.1190232163.2658.python-list@python.org><1190235678.019823.315850@o80g2000hse.googlegroups.com><mailman.887.1190402873.2658.python-list@python.org><7xejgr68pm.fsf@ruckus.brouhaha.com><slrnffetai.ijq.nick@irishsea.home.craig-wood.com><mailman.1031.1190705678.2658.python-list@python.org><7xps07w5g3.fsf@ruckus.brouhaha.com><mailman.1088.1190791009.2658.python-list@python.org>	<slrnffk82a.krt.nick@irishsea.home.craig-wood.com>
	<mailman.1148.1190875995.2658.python-list@python.org>
Message-ID: <2nKKi.937$4V6.695@newssvr14.news.prodigy.net>

Hendrik van Rooyen wrote:
> "Nick Craig-Wood" wrote: [about passing sockets between processes]
>> It is trivial to pass a socket to a new thread or a forked child - you
>> don't need this mechanism for that.  It doesn't work on different
>> machines though - it has to be on the same machine.

> 
> How does a very large volume site work then? - there must be some
> way of sharing the load without bottlenecking it through one machine?

Several ways. The Domain Name System can provide multiple IP
addresses for the same name. IP addresses often often lead
to HTTP "reverse proxies" that shoot back cached replies to
common simple requests, and forward the harder ones to the
file/application servers, with intelligent load balancing.

The services are surprisingly basic, and some excellent
software is free:

   http://en.wikipedia.org/wiki/Round_robin_DNS
   http://en.wikipedia.org/wiki/Reverse_proxy
   http://en.wikipedia.org/wiki/Squid_proxy


Web apps tend to scale just great, except when they need
data that is both shared and modifiable.


-- 
--Bryan


From XX.XmcX at XX.XmclaveauX.com  Mon Sep 10 12:07:07 2007
From: XX.XmcX at XX.XmclaveauX.com (MC)
Date: Mon, 10 Sep 2007 18:07:07 +0200
Subject: shared memory pointer
References: <1189436265.841415.234050@w3g2000hsg.googlegroups.com>
	<mailman.325.1189437043.2658.python-list@python.org>
	<1189437684.476993.130390@g4g2000hsf.googlegroups.com>
Message-ID: <mn.543f7d7944c61cc8.46195@XX.XmclaveauX.com>

Hi!

I agree ; on windows mmap use Memory-Mapped-file, who use virtual 
memory. And shared memory use physical memory.

The difference is OS an not Python




-- 
@-salutations

Michel Claveau




From wizzardx at gmail.com  Mon Sep 10 07:30:56 2007
From: wizzardx at gmail.com (David)
Date: Mon, 10 Sep 2007 13:30:56 +0200
Subject: Enum class with ToString functionality
In-Reply-To: <1189416537.050002.61120@r34g2000hsd.googlegroups.com>
References: <1189416537.050002.61120@r34g2000hsd.googlegroups.com>
Message-ID: <18c1e6480709100430rf627c58we3fc525a1447c264@mail.gmail.com>

On 9/10/07, bg_ie at yahoo.com <bg_ie at yahoo.com> wrote:
> Hi,
>
> I have the following class -
>
> class TestOutcomes:
>     PASSED = 0
>     FAILED = 1
>     ABORTED = 2
>
> plus the following code -
>
> testResult = TestOutcomes.PASSED
>
> testResultAsString
> if  testResult == TestOutcomes.PASSED:
>     testResultAsString = "Passed"
> elif testResult == TestOutcomes.FAILED :
>     testResultAsString = "Failed"
> else:
>     testResultAsString = "Aborted"
>
> But it would be much nicer if I had a function to covert to string as
> part of the TestOutcomes class. How would I implement this?

You can use reflection to do this. Perhaps a constructor that goes
through your class dict (dir(self)) and builds an int->string mapping
property based on the value and name of the attributes (perhaps just
the ones whose type is int). To get the exact same result as your code
above you can capitalize the first letter of the attribute name, and
lowercase the rest.


From Shawn at Milochik.com  Fri Sep  7 14:19:06 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Fri, 7 Sep 2007 14:19:06 -0400
Subject: Python and Cron
In-Reply-To: <a9f39a410709071024u3e669bafu128e8e88c64e072c@mail.gmail.com>
References: <a9f39a410709071024u3e669bafu128e8e88c64e072c@mail.gmail.com>
Message-ID: <2dc0c81b0709071119scb80186k8114f6592391f3f9@mail.gmail.com>

Could you send the output of "crontab -l" and the script you're running?

It's probably an environment issue of some kind, but it's hard to say
what blindly.


From laurent.pointal at limsi.fr  Wed Sep 19 04:12:22 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Wed, 19 Sep 2007 10:12:22 +0200
Subject: lxml codespeak pages empty ?
Message-ID: <fcqll6$5ip$2@news2.u-psud.fr>

I can no longer get codespeak's lxml page at http://codespeak.net/lxml/ 
(get an empty HTML document <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 
Transitional//EN"><html><head><title></title></head><body></body></html>)...

Am-I alone in this case ?
Any codespeaker reading ?

A+

Laurent.



From deets at nospam.web.de  Sat Sep 22 06:34:12 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 22 Sep 2007 12:34:12 +0200
Subject: Who can develop the following Python script into working
	application ?
In-Reply-To: <1190419744.390216.19040@w3g2000hsg.googlegroups.com>
References: <1190334828.210230.293980@50g2000hsm.googlegroups.com>
	<1190372423.768184.60080@19g2000hsx.googlegroups.com>
	<5lho31F84jgjU1@mid.uni-berlin.de>
	<1190419744.390216.19040@w3g2000hsg.googlegroups.com>
Message-ID: <5lk9e0F8leeeU1@mid.uni-berlin.de>

http://members.lycos.co.uk/dariusjack/ schrieb:
> On Sep 21, 1:26 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>> <snip/>
>>
>>> Please help and let me know your terms.
>> There are websites dedicated to this - like e.g.
>>
>> http://www.guru.com/
>>
>> Make an offer there.
>>
>> Diez
> 
> Ok Diez,
> 
> Do you really think only Gurus from Guru.com can help me ?
> Do really need a middle-man ?

What middle-man?

> As you see, I am not developer of that code.
> Henri responded to me, code was intended for developers.
> It doesn't really look complicated or high-tech.
> Script should connect to a remote web site and get xml formatted data
> as a response to a query string http request, read data and inject
> into SQL database.
> Is Python not fit to a task of this kind ?
> Is there no a library of Python free scripts to accomplish the above
> like many for javascripts ?
> I am asking just of curosity, as an author of this script didn't
> respond to my second request  to tell me how complicated is the
> problem and what made him not to write that script as a fully working
> version.
> 
> Is Python so difficult, complicated, even for experienced developers ?

No, it's neither complicated nor difficult. And you know what? Not only 
for expierenced, but also for inexperienced developers it's an easy 
language.

And this community here is an extremely helpful and kind one.

But what it isn't is a forum to ask other to do your work FOR FREE. And 
get kinky about it if they refuse to do so...

And as you said yourself:

"""
Frankly speaking I would prefer to pay for your kind assistance
as it may take me to much time to learn some Python and understand the
following script.
"""

Now, again: http://www.guru.com/ There you can get devlopers for money. 
So what again is your problem?

Diez


From tutufan at gmail.com  Thu Sep 27 10:56:10 2007
From: tutufan at gmail.com (asdfjehqwjerhqjwljekrh)
Date: Thu, 27 Sep 2007 14:56:10 -0000
Subject: Google and Python
In-Reply-To: <1i4xorh.j5nc9k3y60vqN%aleax@mac.com>
References: <1190228512.627109.308910@n39g2000hsh.googlegroups.com>
	<ufadnRC5BPZm6GzbnZ2dnUVZ_jOdnZ2d@comcast.com>
	<1190231094.276099.136250@22g2000hsm.googlegroups.com>
	<mailman.781.1190232163.2658.python-list@python.org>
	<1190235678.019823.315850@o80g2000hse.googlegroups.com>
	<SYpIi.5291$7P7.2845@newssvr19.news.prodigy.net>
	<1i4rfyx.8vuc2j14j596uN%aleax@mac.com>
	<SFJJi.316$ua4.285@newssvr22.news.prodigy.net>
	<1i4xorh.j5nc9k3y60vqN%aleax@mac.com>
Message-ID: <1190904970.990749.113240@o80g2000hse.googlegroups.com>

On Sep 24, 10:40 am, al... at mac.com (Alex Martelli) wrote:
> > Good motto. So is most of Google's code base now in
> > Python? About what is the ratio of Python code to C++
> > code? Of course lines of code is kine of a bogus measure.
> > Of all those cycles Google executes, about what portion
> > are executed by a Python interpreter?
>
> I don't have those numbers at hand, and if I did they would be
> confidential

I would be curious to know whether they code much "mixed model"
coding.  By that I mean (a) code your application in Python, and then
(b) optimize it as necessary by moving some functionality into Python
C/C++ modules.  (Some of (b) may happen during design, of course.)

I think of this as the state of the art in programming practice, and I
wonder whether Google's doing this, or has a superior alternative.

Mike



From stefan.behnel-n05pAM at web.de  Mon Sep 10 09:39:27 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Mon, 10 Sep 2007 15:39:27 +0200
Subject: XML: SAX and XInclude
In-Reply-To: <fc3ggb$obi$1@news2.u-psud.fr>
References: <fc3ggb$obi$1@news2.u-psud.fr>
Message-ID: <46E5490F.8060107@web.de>

Laurent Pointal wrote:
> does anybody know about an XML parser usable with the sax API (xml.sax)
> and with XInclude feature support (directly or via hacks).

Try lxml.etree.

http://codespeak.net/lxml/

http://codespeak.net/lxml/tutorial.html
http://codespeak.net/lxml/api.html#xinclude-and-elementinclude
http://codespeak.net/lxml/parsing.html#iterparse-and-iterwalk

It's not half as complicated as SAX, BTW.

Stefan


From brenNOSPAMbarn at NObrenSPAMbarn.net  Thu Sep 20 13:05:08 2007
From: brenNOSPAMbarn at NObrenSPAMbarn.net (OKB (not okblacke))
Date: Thu, 20 Sep 2007 17:05:08 GMT
Subject: Sets in Python
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
	<CeB*qHeVr@news.chiark.greenend.org.uk>
	<1190235483.412972.81280@v23g2000prn.googlegroups.com>
	<13f3m15igkstq2e@corp.supernews.com>
	<1190260923.243865.312190@z24g2000prh.googlegroups.com>
	<13f4nclh902f78f@corp.supernews.com>
Message-ID: <Xns99B16684BC49AOKB@199.45.49.11>

Steven D'Aprano wrote:

> But of course you can't look up the dict by value, only by
> identity. But that's what you wanted.

    	Actually, if I understand the OP's examples right, he wants to look 
up only by value, not by identity.

-- 
--OKB (not okblacke)
Brendan Barnwell
"Do not follow where the path may lead.  Go, instead, where there is
no path, and leave a trail."
	--author unknown


From facundobatista at gmail.com  Wed Sep 19 16:41:49 2007
From: facundobatista at gmail.com (Facundo Batista)
Date: Wed, 19 Sep 2007 17:41:49 -0300
Subject: Python tickets summary
In-Reply-To: <e04bdf310709101325o1315adb0pebcb2f33d8313f35@mail.gmail.com>
References: <e04bdf310709101325o1315adb0pebcb2f33d8313f35@mail.gmail.com>
Message-ID: <e04bdf310709191341l289c034fjb4bf6d6b88ae4ef9@mail.gmail.com>

2007/9/10, Facundo Batista <facundobatista at gmail.com>:

> I modified my tool, whichs makes a summary of all the Python tickets
> (I moved the source where the info is taken from SF to our Roundup).

Based on an idea from Dennis Benzinger, now the temporal bars show the
moments where each comment was made, so it's easy to see the "rhythm"
of the ticket activity:

  http://www.taniquetil.com.ar/facundo/py_tickets.html

Regards,

-- 
.    Facundo

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


From bert at bertisevil.tv  Thu Sep  6 15:06:23 2007
From: bert at bertisevil.tv (Evil Bert)
Date: Thu, 06 Sep 2007 12:06:23 -0700
Subject: interesting puzzle......try this you will be rewarded...
In-Reply-To: <46e04138$0$16377$88260bb3@free.teranews.com>
References: <1189072576.997085.32360@r29g2000hsg.googlegroups.com>
	<46e04138$0$16377$88260bb3@free.teranews.com>
Message-ID: <IcYDi.1436$4J3.235@newssvr22.news.prodigy.net>

Tobiah wrote:
> My adblock extension must be doing a great job.
> I don't see any ads.  The puzzle is fun really,
> but I'm stuck right now at 'eeiigg'.

eight --> eeiigg
nine --> nniinn

Kinda silly, but it works


From Michael.J.Fromberger at Clothing.Dartmouth.EDU  Wed Sep 19 17:55:39 2007
From: Michael.J.Fromberger at Clothing.Dartmouth.EDU (Michael J. Fromberger)
Date: Wed, 19 Sep 2007 17:55:39 -0400
Subject: Parsing problems: A journey from a text file to a directory tree
References: <1189958074.670245.17910@n39g2000hsh.googlegroups.com>
	<Michael.J.Fromberger-550C9C.14515118092007@localhost>
	<1190154665.944722.137750@q3g2000prf.googlegroups.com>
Message-ID: <Michael.J.Fromberger-6E17B1.17553919092007@localhost>

Hi, John,

Your comments below are all reasonable.  However, I would like to point 
out that the purpose of my example was to provide a demonstration of an 
algorithm, not an industrial-grade solution to every aspect of the 
original poster's problem.  I am confident the original poster can deal 
with these aspects of his problem space on his own.

In article <1190154665.944722.137750 at q3g2000prf.googlegroups.com>,
 John Machin <sjmachin at lexicon.net> wrote:

> [...]
> > .            while new_level < len(state):
> > .                state.pop()
> 
> Hmmm ... consider rewriting that as the slightly less obfuscatory
> 
>     while len(state) > new_level:
>         state.pop()

This seems to me to be an aesthetic consideration only; I'm not sure I 
understand your rationale for reversing the sense of the comparison.  
Since it does not change the functionality, it's hardly worthy of 
complaint, but I don't see any improvement, either.

> A warning message if there are too many "-" characters might be a good
> idea:
> 
> [foo]
> |-bar
> |-zot
> |---plugh

Perhaps so.  Again, the original poster will have to decide what should 
be the correct response to input of this sort; at present, the 
implementation is tolerant of such variations, without loss of 
generality.

> And if the input line matches neither regex?

I believe it should be clear that such lines are ignored.  Again, this 
is an opportunity for the original poster to determine an alternative 
response -- perhaps an exception could be raised, if that is his desire.  
The problem specification did not constrain this case.

> > To call this, pass a file-like object to parse_folders(), e.g.:
> >
> > test1 = '''
> > [New client].
> 
> Won't work with the dot on the end.

My mistake.  The period was a copy-and-paste artifact, which I missed.

Cheers,
-M

-- 
Michael J. Fromberger             | Lecturer, Dept. of Computer Science
http://www.dartmouth.edu/~sting/  | Dartmouth College, Hanover, NH, USA


From robin at NOSPAMreportlab.com  Wed Sep 19 17:17:19 2007
From: robin at NOSPAMreportlab.com (Robin Becker)
Date: Wed, 19 Sep 2007 22:17:19 +0100
Subject: Odd files; just left behind?
In-Reply-To: <878x725ts7.fsf@pobox.com>
References: <mailman.760.1190205969.2658.python-list@python.org>
	<878x725ts7.fsf@pobox.com>
Message-ID: <46F191DF.7000908@jessikat.plus.net>

John J. Lee wrote:
> Robin Becker <robin at reportlab.com> writes:
> 
>> I see a folder .python-eggs in my home directory on one of our servers
>> with various .so files
>>
>> ~/.python-eggs/MySQL_python-1.2.2-py2.3-freebsd-6.1-SECURITY-i386.egg-tmp/_mysql.so
>>
>> are these just left behind from some install process?
> 
> Ah, it's about the resource extraction feature of setuptools.  It's
> possible for zipped eggs to contain resources that have to be
> extracted to the filesystem.  It puts them in the directory you saw
> (or somewhere else -- see the docstring in my other reply).
> 
> http://peak.telecommunity.com/DevCenter/PkgResources#resource-extraction
> http://peak.telecommunity.com/DevCenter/setuptools#automatic-resource-extraction
.....
Thanks John, but why not clean up?

-- 
Robin Becker


From zzbbaadd at aol.com  Mon Sep 10 07:52:34 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Mon, 10 Sep 2007 04:52:34 -0700
Subject: Enum class with ToString functionality
In-Reply-To: <1189416537.050002.61120@r34g2000hsd.googlegroups.com>
References: <1189416537.050002.61120@r34g2000hsd.googlegroups.com>
Message-ID: <1189425154.788466.132370@d55g2000hsg.googlegroups.com>

On Sep 10, 2:28 am, bg... at yahoo.com wrote:
> Hi,
>
> I have the following class -
>
> class TestOutcomes:
>     PASSED = 0
>     FAILED = 1
>     ABORTED = 2
>
> plus the following code -
>
> testResult = TestOutcomes.PASSED
>
> testResultAsString
> if  testResult == TestOutcomes.PASSED:
>     testResultAsString = "Passed"
> elif testResult == TestOutcomes.FAILED :
>     testResultAsString = "Failed"
> else:
>     testResultAsString = "Aborted"
>
> But it would be much nicer if I had a function to covert to string as
> part of the TestOutcomes class. How would I implement this?
>
> Thanks,
>
> Barry

class TestOutcomes:
    PASSED = 0
    FAILED = 1
    ABORTED = 2

    def ToString(outcome):
        if  outcome == TestOutcomes.PASSED:
           return "Passed"
        elif outcome == TestOutcomes.FAILED :
           return "Failed"
        else:
           return "Aborted"

    ToString = staticmethod(ToString)

if __name__ == "__main__":
    testResult = TestOutcomes.PASSED
    testResultAsString = TestOutcomes.ToString(testResult)
    print testResultAsString
    print TestOutcomes.ToString(testResult)


Passed
Passed



From michele.simionato at gmail.com  Thu Sep  6 05:18:07 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Thu, 06 Sep 2007 09:18:07 -0000
Subject: How to do python and RESTful
In-Reply-To: <1189022079.403495.175800@g4g2000hsf.googlegroups.com>
References: <1189022079.403495.175800@g4g2000hsf.googlegroups.com>
Message-ID: <1189070287.239501.70270@k79g2000hse.googlegroups.com>

On Sep 5, 9:54 pm, MarkyMarc <marcsgbrevko... at gmail.com> wrote:
> Hi all,
>
> I want to make a web service application in python and keywords are
> RESTful, python and nice urls(urls mapped to python objects).
>
> I don't want a big framework but a nice small one, that can just do
> the things I want.
>
> I have be looking at quixote, but is this uptodate? "plain"
> mod_python, can this make url to http put,get,delete and post?
>
> Can some one here point me some where I can read about python and
> RESTful or have some experiences with other?
>
> Any help is apricieted.
>
> Regards Marc

For the client part, there is an easy_installable library called
restclient (which
I tested very little but it seems to work). For the server part, I am
sure there are
many available, but is also easy to write your own. For instance,
using WSGI,
you can do something like:

   def restful_wsgi_app(env, resp):
        meth = env.get('REQUEST_METHOD')
        if meth == 'GET':
            ...
        elif meth == 'POST':
            ...
        elif meth == 'PUT':
            ....
        elif meth == 'DELETE':
            ...
        else:
            raise ValueError('Unknown HTTPMethod %r!!' % meth)
        ...

      Michele Simionato



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Sep 18 10:38:59 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 18 Sep 2007 16:38:59 +0200
Subject: Saving parameters between Python applications?
In-Reply-To: <1190122569.509673.41420@57g2000hsv.googlegroups.com>
References: <1189969538.830532.98840@g4g2000hsf.googlegroups.com>
	<fcm036$cp8$1@news2.u-psud.fr>
	<1190060967.696332.113190@n39g2000hsh.googlegroups.com>
	<1190122569.509673.41420@57g2000hsv.googlegroups.com>
Message-ID: <46efe2fb$0$27792$426a74cc@news.free.fr>

Stodge a ?crit :
> os.path.expanduser isn't an option; I need each console/window to
> maintain different values which I wouldn't get from saving to a user's
> home directory. Unless I used a different file for each console/window
> but that just gets me into the same situation I'm already in. I think
> the only option is to set environment variables using another script.
> I'm really surprised and disapponited by this.

Note that it's *not* a Python issue. You'd have the same problem with 
any other language.



From wgwhalley at gmail.com  Thu Sep 13 15:16:54 2007
From: wgwhalley at gmail.com (WGWhalley)
Date: Thu, 13 Sep 2007 12:16:54 -0700
Subject: Search path for python script
In-Reply-To: <1189633230.265179.58780@19g2000hsx.googlegroups.com>
References: <1189633230.265179.58780@19g2000hsx.googlegroups.com>
Message-ID: <z66dnV3OQo8DEXTbnZ2dnUVZ_uygnZ2d@comcast.com>

This works for me under cygwin.

Start the script with the line
#! /usr/bin/python

Place the script in a directory shown by the command
echo $PATH

Invoke the script using its name, i.e.

test.py




From richyjsm at gmail.com  Sat Sep 22 14:09:49 2007
From: richyjsm at gmail.com (richyjsm at gmail.com)
Date: Sat, 22 Sep 2007 18:09:49 -0000
Subject: Getting rid of bitwise operators in Python 3?
In-Reply-To: <miaJi.28220$eY.3184@newssvr13.news.prodigy.net>
References: <46f49740$0$32514$4c368faf@roadrunner.com>
	<miaJi.28220$eY.3184@newssvr13.news.prodigy.net>
Message-ID: <1190484589.890198.266430@y42g2000hsy.googlegroups.com>

On Sep 22, 11:13 am, Bryan Olson <fakeaddr... at nowhere.org> wrote:
> One surprising result was that more of the Python
> programmers surveyed use bitwise operators than are aware
> of the exponentiation operator, which C does not offer.

On that subject, I'd suggest that the pow() builtin (not the **
operator - just the pow() function) should also be a candidate for
removal...

Richard




From pavlovevidence at gmail.com  Sat Sep 22 01:32:37 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sat, 22 Sep 2007 01:32:37 -0400
Subject: Getting rid of bitwise operators in Python 3?
References: <46f49740$0$32514$4c368faf@roadrunner.com>
	<46f4a2e2$0$17220$9b622d9e@news.freenet.de>
Message-ID: <46f4b35b$0$19648$4c368faf@roadrunner.com>

On Sat, 22 Sep 2007 05:06:42 +0000, Stargaming wrote:
> On Fri, 21 Sep 2007 23:44:00 -0400, Carl Banks wrote:
> 
>> Anyone with me here?  (I know the deadline for P3 PEPs has passed; this
>> is just talk.)
>> 
>> Not many people are bit-fiddling these days.
> 
> Why did we invent the `binary literals`_ (0b101) then?

Hah, good point.

Ironic that base-2 literals are going into Python, but have never been a 
standard part of C where they would be a LOT more useful.


Carl Banks


From andreaswapf at gmail.com  Wed Sep 12 21:13:13 2007
From: andreaswapf at gmail.com (Andreas Wapf)
Date: Wed, 12 Sep 2007 18:13:13 -0700
Subject: python & osgi
Message-ID: <1189645993.968565.313760@57g2000hsv.googlegroups.com>

Is there something like a osgi implementation in python? I am really
impressed by the bundle system and the possibility to load and unload
bundles without wasting memory. Is it even possible to do something
like that in python? Would be nice to have a very small python
interpreter and just load the modules as needed.



From robin at reportlab.com  Fri Sep 21 05:32:44 2007
From: robin at reportlab.com (Robin Becker)
Date: Fri, 21 Sep 2007 10:32:44 +0100
Subject: Odd files; just left behind?
In-Reply-To: <46f2bd9b$0$20143$426a74cc@news.free.fr>
References: <mailman.760.1190205969.2658.python-list@python.org>	<878x725ts7.fsf@pobox.com>
	<46F191DF.7000908@jessikat.plus.net>
	<46f2bd9b$0$20143$426a74cc@news.free.fr>
Message-ID: <46F38FBC.7090903@chamonix.reportlab.co.uk>

Bruno Desthuilliers wrote:
> Robin Becker a ?crit :
>> John J. Lee wrote:
>>
>>> Robin Becker <robin at reportlab.com> writes:
>>>
>>>> I see a folder .python-eggs in my home directory on one of our servers
>>>> with various .so files
>>>>
>>>> ~/.python-eggs/MySQL_python-1.2.2-py2.3-freebsd-6.1-SECURITY-i386.egg-tmp/_mysql.so 
>>>>
>>>>
>>>> are these just left behind from some install process?
>>>
>>> Ah, it's about the resource extraction feature of setuptools.  It's
>>> possible for zipped eggs to contain resources that have to be
>>> extracted to the filesystem.  It puts them in the directory you saw
>>> (or somewhere else -- see the docstring in my other reply).
>>>
>>> http://peak.telecommunity.com/DevCenter/PkgResources#resource-extraction
>>> http://peak.telecommunity.com/DevCenter/setuptools#automatic-resource-extraction 
>>>
>> .....
>> Thanks John, but why not clean up?
>>
> Does it needs to be "cleaned up" ? .so files (shared libs) *need* to be 
> extracted from the egg to be usable. Where they are extracted is IIRC 
> configurable...
You're right! These files aren't temporary? It seems strange that the python 
files live with their associated lib/site-packages and the .so files are 
somewhere entirely different.

Python 2.3.6 (#1, Jun  7 2007, 10:44:52)
[GCC 3.4.4 [FreeBSD] 20050518] on freebsd6
Type "help", "copyright", "credits" or "license" for more information.
 >>> import MySQLdb
 >>> print MySQLdb.__file__
/myhome/PYTHON/lib/python2.3/site-packages/MySQL_python-1.2.2-py2.3-freebsd-6.1-SECURITY-i386.egg/MySQLdb/__init__.pyc
 >>> import _mysql
 >>> print _mysql.__file__
/myhome/.python-eggs/MySQL_python-1.2.2-py2.3-freebsd-6.1-SECURITY-i386.egg-tmp/_mysql.so
 >>>

it would seem simpler to have the .so files inside the site-packages and there's 
the question of why this folder has to be obfuscated (name starts with .). Even 
if these files are "resources" why should they be assumed to belong to the user? 
I could make the PYTHON folder world usable, but that won't help if I make all 
other things in myhome private. Surely code resources belong in the same area as 
the code that uses them.

Just another nonsense from the eggworld
-- 
Robin Becker



From harry.g.george at boeing.com  Thu Sep  6 03:18:31 2007
From: harry.g.george at boeing.com (Harry George)
Date: Thu, 6 Sep 2007 07:18:31 GMT
Subject: Sip4.7
References: <1189084181.385917.253950@d55g2000hsg.googlegroups.com>
Message-ID: <xqx642ocldk.fsf@cola3.ca.boeing.com>

luca72 <lucaberto at libero.it> writes:

> Hello
> i have python2.5 with sip4.6 installed on a linux machine, i need to
> install sip4.7 but i get a lot of error like this:
>
> sip.h:525: error: expected specifier-qualifier-list before
> 'PyMethodDef'
> sip.h:609: error: expected specifier-qualifier-list before
> 'sipForceConvertToFunc'
> sip.h:666: error: expected specifier-qualifier-list before 'PyObject'
> sip.h:902: error: expected specifier-qualifier-list before
> 'PyTypeObject
> sipint.h:81: error: expected '=', ',', ';', 'asm' or '__attribute__'
> before '*' token
> sipint.h:86: error: expected '=', ',', ';', 'asm' or '__attribute__'
> before '*' token
> sipint.h:87: error: expected '=', ',', ';', 'asm' or '__attribute__'
> before '*' token
> siplib.c:39: error: expected ')' before '*' token
> siplib.c:41: error: expected ')' before '*' token
> siplib.c:43: error: expected ')' before '*' token
> siplib.c:45: error: expected ')' before '*' token
> siplib.c:48: error: expected ')' before '*' token
> plib.c:285: error: expected specifier-qualifier-list before 'PyObject'
> siplib.c:290: error: expected '=', ',', ';', 'asm' or '__attribute__'
> before 'sipWrapperType_Type'
>
> Have you some idea why?
>
> Regards
>
> Luca
>

On Linux, py2.5 installed, sip 4.6 installed:

I just tried it using gcc/g++ 3.4.6 and and then a fresh start with
gcc/g++ 4.2.0.  Both worked fine.  If you have an older gcc/g++ that
might give the effect.

Notice that I have a wrapper to set paths for qt4, and a wrapper to
run python2.5.1.  These are for convenience and should not impact
results, unless of course you aren't makeing qt4 visible to the sip
compile process.

[sip-4.7]$ qt4 py25 configure.py
This is SIP 4.7 for Python 2.5.1 on linux2.
The SIP code generator will be installed in /usr/local/bin.
The SIP module will be installed in /usr/local/lib/python2.5/site-packages.
The SIP header file will be installed in /usr/local/include/python2.5.
The default directory to install .sip files in is /usr/local/share/sip.
The platform/compiler configuration is linux-g++.
Creating sipconfig.py...
Creating top level Makefile...
Creating sip code generator Makefile...
Creating sip module Makefile...
[build at cola3 sip-4.7]$ gmake
gmake[1]: Entering directory `/usr2/src/qt/sip-4.7/sipgen'
gcc -c -pipe -O2 -w -I. -o main.o main.c
gcc -c -pipe -O2 -w -I. -o transform.o transform.c
gcc -c -pipe -O2 -w -I. -o gencode.o gencode.c
gcc -c -pipe -O2 -w -I. -o export.o export.c
gcc -c -pipe -O2 -w -I. -o heap.o heap.c
gcc -c -pipe -O2 -w -I. -o parser.o parser.c
gcc -c -pipe -O2 -w -I. -o lexer.o lexer.c
g++  -o sip main.o transform.o gencode.o export.o heap.o parser.o lexer.o 
gmake[1]: Leaving directory `/usr2/src/qt/sip-4.7/sipgen'
gmake[1]: Entering directory `/usr2/src/qt/sip-4.7/siplib'
gcc -c -pipe -fPIC -O2 -w -I. -I/usr/local/include/python2.5 -o siplib.o siplib.c
gcc -c -pipe -fPIC -O2 -w -I. -I/usr/local/include/python2.5 -o qtlib.o qtlib.c
gcc -c -pipe -fPIC -O2 -w -I. -I/usr/local/include/python2.5 -o threads.o threads.c
gcc -c -pipe -fPIC -O2 -w -I. -I/usr/local/include/python2.5 -o objmap.o objmap.c
g++ -c -pipe -fPIC -O2 -w -I. -I/usr/local/include/python2.5 -o bool.o bool.cpp
g++ -shared -Wl,--version-script=sip.exp -o sip.so siplib.o qtlib.o threads.o objmap.o bool.o 
gmake[1]: Leaving directory `/usr2/src/qt/sip-4.7/siplib'


-- 
Harry George
PLM Engineering Architecture


From gandalf at shopzeus.com  Thu Sep  6 10:41:03 2007
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Thu, 06 Sep 2007 16:41:03 +0200
Subject: 2 python questions!
In-Reply-To: <20070905091437.C7C09C3821@mailserver10.hushmail.com>
References: <20070905091437.C7C09C3821@mailserver10.hushmail.com>
Message-ID: <46E0117F.8030700@shopzeus.com>

resist_think at hushmail.com wrote:
> Hi python community!
> First question has to do with threading support. There is the 
> following simple case:
> I have a dictionnary that gets it's values -which are url's-from a 
> function. Sort of
>
> dictionnary['1'] = "http://www.google.com"
> dictionnary['2'] = "http://www.python.com"
> ....
>
> I need to fill in the dictionnary with some url's. If I do it on 
> the simplest way, it would be like:
>
> for i in range(20):
>    dictionnary["%s" % i] = get_urls(args)
>
> and wait a long long time till it finishes. Can I do it easily with 
> threads, without having to add too much code? Ideal case would be 
> if all threads start simultaneously :)
>   
Look at thread.start_new_thread here: 
http://docs.python.org/lib/module-thread.html
You can call a function in a separate thread, and you do not need to 
write a new class.

(I do not like start_new_thread and I would define classes for this, but 
you are free to use this feature.)
> Now the second question has to do with images retrieval and 
> manipulation. Which libraries do you propose to work with to 
> retrieve and resize images from the web? 
>   
I would use PIL because it is popular, easy to use, available on most 
platforms and has few dependencies.

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


Best,

   Laszlo



From http  Tue Sep 25 03:49:00 2007
From: http (Paul Rubin)
Date: 25 Sep 2007 00:49:00 -0700
Subject: Google and Python
References: <1190228512.627109.308910@n39g2000hsh.googlegroups.com>
	<ufadnRC5BPZm6GzbnZ2dnUVZ_jOdnZ2d@comcast.com>
	<1190231094.276099.136250@22g2000hsm.googlegroups.com>
	<mailman.781.1190232163.2658.python-list@python.org>
	<1190235678.019823.315850@o80g2000hse.googlegroups.com>
	<mailman.887.1190402873.2658.python-list@python.org>
	<7xejgr68pm.fsf@ruckus.brouhaha.com>
	<slrnffetai.ijq.nick@irishsea.home.craig-wood.com>
	<mailman.1031.1190705678.2658.python-list@python.org>
Message-ID: <7xps07w5g3.fsf@ruckus.brouhaha.com>

"Hendrik van Rooyen" <mail at microcorp.co.za> writes:
> What is the advantage of passing the open file rather than just the
> fully qualified file name and having the other process open the
> file itself?

The idea is that the application is a web server.  The socket listener
accepts connections and hands them off to other processes.  That is,
the file descriptors are handles on network connections that were
opened by the remote client, not disk files that can be opened
locally.


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun Sep  9 07:14:21 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 09 Sep 2007 13:14:21 +0200
Subject: Python syntax wart
References: <fbvvil$7dj$1@lust.ihug.co.nz> <5khh6nF3i5nuU1@mid.uni-berlin.de>
	<46E390B7.2080808@web.de> <fc0518$aa2$5@lust.ihug.co.nz>
Message-ID: <5ki2sdF3nr68U1@mid.individual.net>

Lawrence D'Oliveiro wrote:
> But then you can no longer use indentation to display the
> two-dimensional structure of the statement.

How can a statement be two-dimensional? Like a two-dimensional
Turing Machine?

Regards,


Bj?rn

-- 
BOFH excuse #156:

Zombie processes haunting the computer



From bbxx789_05ss at yahoo.com  Sun Sep 16 04:47:59 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sun, 16 Sep 2007 01:47:59 -0700
Subject: (wxPython) wx.ProgressDialog - how to cancel out of?
In-Reply-To: <1189898710.639012.142170@19g2000hsx.googlegroups.com>
References: <rvrme3tb8snr5rnqgf5p8g1g4ponp0nbfj@4ax.com>
	<1189898710.639012.142170@19g2000hsx.googlegroups.com>
Message-ID: <1189932479.661450.13280@19g2000hsx.googlegroups.com>

On Sep 15, 5:25 pm, 7stud <bbxx789_0... at yahoo.com> wrote:
>    dialog.Destroy()
>    timer.Stop()

>    win.Show() #********************

You can also change that last line to win.Destroy(), and then the user
will never see the frame.



From bignose+hates-spam at benfinney.id.au  Wed Sep 12 00:14:00 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 12 Sep 2007 14:14:00 +1000
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<7x7imwpn1u.fsf@ruckus.brouhaha.com>
Message-ID: <87abrs7c6v.fsf@benfinney.id.au>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:

> TheFlyingDutchman <zzbbaadd at aol.com> writes:
> > Python user and advocate Bruce Eckel is disappointed with the
> > additions (or lack of additions) in Python 3:
> > 
> > http://www.artima.com/weblogs/viewpost.jsp?thread=214112
> 
> That article is pretty weak.

It is responded to by Guido here:

   "A Response to Bruce Eckel"
    <URL:http://www.artima.com/weblogs/viewpost.jsp?thread=214325>

-- 
 \      "The trouble with eating Italian food is that five or six days |
  `\                     later you're hungry again."  -- George Miller |
_o__)                                                                  |
Ben Finney


From marco at yafd.de  Mon Sep 24 06:49:17 2007
From: marco at yafd.de (Marco)
Date: Mon, 24 Sep 2007 12:49:17 +0200
Subject: vim - what's a smarttab?
In-Reply-To: <1190624225.926815.149720@50g2000hsm.googlegroups.com>
References: <1190624225.926815.149720@50g2000hsm.googlegroups.com>
Message-ID: <46F7962D.8000007@yafd.de>

Hi "7stud",

> Alternatively, what is a smarttab?

in VIM type :help smarttab and you'll see the following:

'smarttab' 'sta'        boolean (default off)
                         global
                         {not in Vi}
When on, a <Tab> in front of a line inserts blanks according to
'shiftwidth'.  'tabstop' or 'softtabstop' is used in other places.  A
<BS> will delete a 'shiftwidth' worth of space at the start of the
line.
When off, a <Tab> always inserts blanks according to 'tabstop' or
'softtabstop'.  'shiftwidth' is only used for shifting text left or
right |shift-left-right|.
What gets inserted (a Tab or spaces) depends on the 'expandtab'
option.  Also see |ins-expandtab|.  When 'expandtab' is not set, the
number of spaces is minimized by using <Tab>s.
NOTE: This option is reset when 'compatible' is set.

If you'd like to use VIM for Python make sure you have the following 
settings for the best result:
http://www.vex.net/~x/python_and_vim.html

Marco


From detlev at die-offenbachs.de  Sun Sep 30 12:02:39 2007
From: detlev at die-offenbachs.de (Detlev Offenbach)
Date: Sun, 30 Sep 2007 18:02:39 +0200
Subject: ANN: eric 4.0.2 released
Message-ID: <fdohav$ndn$3@online.de>

Hi,

this is to inform you about the release of eric 4.0.2. This is mainly a
bugfix release.

As usual you may get it at
http://www.die-offenbachs.de/eric/index.html

ChangeLog
---------
- compatibility fixes for Debian
- added '-z' to the installer to inhibit compilation of the python files
- changed code to not look for the Qt4 tools in a subdirectory of the Qt
  installation directory (it is now required, that the Qt bin directory 
  is in the PATH)
- changed code of Python debug client to better intercept output on
  non-win32 systems

What is eric?
-------------
eric is a Python and Ruby IDE with all batteries included. It is written
using PyQt4 and QScintilla2. For details see the a.m. web site.

Regards,
Detlev
-- 
Detlev Offenbach
detlev at die-offenbachs.de


From knipknap at gmail.com  Thu Sep  6 12:13:56 2007
From: knipknap at gmail.com (Samuel)
Date: Thu, 06 Sep 2007 16:13:56 -0000
Subject: ImportError depending on the calling module
In-Reply-To: <1189093482.137051.73770@r29g2000hsg.googlegroups.com>
References: <1189079269.279716.254560@50g2000hsm.googlegroups.com>
	<1189093482.137051.73770@r29g2000hsg.googlegroups.com>
Message-ID: <1189095236.413270.288090@50g2000hsm.googlegroups.com>

On Sep 6, 5:44 pm, Gabriel Genellina <gagsl-... at yahoo.com.ar> wrote:
> On 6 sep, 08:47, Samuel <knipk... at gmail.com> wrote:
> > Given the following directory structure:
>
> > ---------
> > |-- Obj.py
> > |-- __init__.py
> > |-- foo
> > |   |-- FooTest.py
> > |   `-- __init__.py
> > `-- start1.py
> > ---------
>
> The container looks like a package (you didn't tell us the name).
> Should be placed somewhere accessible thru sys.path

But it is. I added the path to sys.path.

> They should import the package as any other
> client code, without doing any import tricks nor playing with
> sys.path.

Why does it matter whether I install it in sys.path or whether
sys.path is modified? What's the difference?

What I am doing is I ship two modules in one tarball with my software.
The software is only unpacked and ran. It has to work without
installation.

-Samuel



From fakeaddress at nowhere.org  Sun Sep 30 13:49:23 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Sun, 30 Sep 2007 10:49:23 -0700
Subject: s.split() on multiple separators
In-Reply-To: <1191160394.870241.171200@w3g2000hsg.googlegroups.com>
References: <1191160394.870241.171200@w3g2000hsg.googlegroups.com>
Message-ID: <bkRLi.1723$hI7.1162@newssvr17.news.prodigy.net>

mrkafk at gmail.com wrote:
> Hello everyone,
> 
> OK, so I want to split a string c into words using several different
> separators from a list (dels).
> 
> I can do this the following C-like way:
> 
>  c=' abcde abc cba fdsa bcd '.split()
>  dels='ce '
>  for j in dels:
> 	cp=[]
> 	for i in xrange(0,len(c)-1):

The "-1" looks like a bug; remember in Python 'stop' bounds
are exclusive. The indexes of c are simply xrange(len(c)).

Python 2.3 and up offers: for (i, word) in enumerate(c):

> 		cp.extend(c[i].split(j))
> 	c=cp
> 
> 
> c
> ['ab', 'd', '', 'ab', '', '']

The bug lost some words, such as 'fdsa'.


> But. Surely there is a more Pythonic way to do this?

When string.split() doesn't quite cut it, try re.split(), or
maybe re.findall(). Is one of these what you want?

     import re

     c = ' abcde abc cba fdsa bcd '

     print re.split('[ce ]', c)

     print re.split('[ce ]+', c)

     print re.findall('[^ce ]+', c)


-- 
--Bryan


From jcd at sdf.lonestar.org  Tue Sep 11 07:20:28 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Tue, 11 Sep 2007 07:20:28 -0400
Subject: function to do dynamic import?
In-Reply-To: <13ecb84p1ghrd64@corp.supernews.com>
References: <13ecb84p1ghrd64@corp.supernews.com>
Message-ID: <46E679FC.1000302@sdf.lonestar.org>

bambam wrote:
> import works in the main section of the module, but does
> not work as I hoped when run inside a function.
>
> That is, the modules import correctly, but are not visible to
> the enclosing (global) scope.
>
> Questions:
> (1) Where can I read an explanation of this?
> (2) Is there a work around?
>
> BTW, sys.modules("filename") shows that the module is
> loaded, I just don't know how to use it when loaded that
> way.  Also, if I import again at the global scope, the module
> name becomes available.
>
> Steve.
>
> ---
>   
>>>> def gim():
>>>>         
> ... exec "import gamel"
> ...
>   
All you have done in this function is bind the module to the name gamel
within the scope of the function.  As soon as the function exits, the
module goes out of scope.  If you want to use it externally, return the
module.

def: gim():
    import gamel
    return gamel
>>>> gim()
>>>>         
This will have to change to

gamel = gim()

and the rest should work as expected.
>>>> sys.modules["gamel"]
>>>>         
> <module 'gamel' from 'c:\gamel.pyc'>
>   
>>>> gamel
>>>>         
> NameError: name 'gamel' is not defined
>   
>>>> exec "import gamel"
>>>> gamel
>>>>         
> <module 'gamel' from 'c:\gamel.pyc'> 
>
>
>   



From gagsl-py2 at yahoo.com.ar  Sun Sep  9 23:08:22 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 10 Sep 2007 00:08:22 -0300
Subject: Setting stdout encoding
References: <cfb578b20709091349q3c3ac1faq61d250e69d460506@mail.gmail.com>
Message-ID: <op.tye4b8h7x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 09 Sep 2007 17:49:14 -0300, Fabio Zadrozny <fabiofz at gmail.com>  
escribi?:

> Does someone know if there's a way to explicitly set the  
> stdout/stderr/stdin
> encoding that python should use?

The encoding can be set using the C API for file objects - from Python  
code, use ctypes:

py> from ctypes import *
py> PyFile_SetEncoding = pythonapi.PyFile_SetEncoding
py> PyFile_SetEncoding.argtypes = (py_object, c_char_p)
py> if not PyFile_SetEncoding(sys.stdout, "hex"):
...     raise ValueError
...
py> print "Hello"
Hello
py> print u"Hello"
48656c6c6f

-- 
Gabriel Genellina



From n00m at narod.ru  Fri Sep 21 09:58:57 2007
From: n00m at narod.ru (n00m)
Date: Fri, 21 Sep 2007 06:58:57 -0700
Subject: SHOCK: WHY None?
Message-ID: <1190383137.015553.235870@o80g2000hse.googlegroups.com>

def f(i,sm):
    if i+1==len(a):
        print sm+a[i]
        return sm+a[i]
    else:
        f(i+1,sm+a[i])

a=[1,2,3,4,5]

print f(0,0)




>>>
15
None
>>>



From JYOUNG79 at kc.rr.com  Wed Sep 12 15:21:22 2007
From: JYOUNG79 at kc.rr.com (JYOUNG79 at kc.rr.com)
Date: Wed, 12 Sep 2007 14:21:22 -0500
Subject: xml question
Message-ID: <c772ddb239364.39364c772ddb2@rdc-kc.rr.com>

Just curious if there's any python xml parsing tools built into the Mac (OS 10.4.10 Tiger)?  If so, 
could anyone 
share some simple code (or maybe point me to a web-site) of how to parse xml data from a 
file?  For example,  if I 
had a file that contained this:

		<colors>
			<color base="DeviceGray" />
			<color alt="DeviceCMYK" base="Separation">Black</color>
			<color alt="Lab" base="Separation">Light Blue</color>
			<color alt="ICCBased" base="Separation">Green</color>
		</colors>

I'd want to look in the 'colors' xml element, then look at each 'color' xml element inside and 
pull any that have 
values (which would be Black, Light Blue and Green).  I'd like to know how to pull 'attributes' 
too.

Thanks very much for your help.

Jay


From gagsl-py2 at yahoo.com.ar  Thu Sep 27 02:35:08 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 27 Sep 2007 03:35:08 -0300
Subject: Asynchronous Messaging
References: <1190807252.731074.141450@k79g2000hse.googlegroups.com>
	<1190819912.344267.52680@50g2000hsm.googlegroups.com>
	<mailman.1119.1190822847.2658.python-list@python.org>
	<1190868212.383316.20990@57g2000hsv.googlegroups.com>
Message-ID: <op.tzau8uypx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 27 Sep 2007 01:43:32 -0300, wink <wink at saville.com> escribi?:

> You are most correct, but Queue is slow compared to deque but
> not for the reason I guessed. Apparently it's because deque is
> implemented in C while Queue is in python. Using the program below
> it looks there is about a 35:1 speed difference.

That't not the reason. A Queue is built around a container, and it happens  
to be a deque in the default implementation. But the important thing is  
that a Queue is a synchronized object - it performs the necesary  
synchronization to ensure proper operation even from multiple threads  
attempting to use it at the same time.
So your comparison is meaningless, apart from telling that using mutexes  
is not cheap.

-- 
Gabriel Genellina



From duncan.booth at invalid.invalid  Wed Sep 26 09:46:03 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 26 Sep 2007 13:46:03 GMT
Subject: sorteddict PEP proposal [started off as orderedict]
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>
	<1190753722.026806.254530@d55g2000hsg.googlegroups.com>
	<1190756003.292096.71130@o80g2000hse.googlegroups.com>
	<1190789981.385466.37870@57g2000hsv.googlegroups.com>
	<Xns99B760A3F5859duncanbooth@127.0.0.1>
	<1190805297.182232.116830@50g2000hsm.googlegroups.com>
Message-ID: <Xns99B7957CCE43Fduncanbooth@127.0.0.1>

Paul Hankin <paul.hankin at gmail.com> wrote:

>> I suspect that for many use patterns you could improve performance
>> significantly by having two levels of invalidation for the the key
>> list: in __setitem__, if the key already exists you don't need to
>> discard the list in __keycache (although if a key or cmp function was
>> provided it may no longer be sorted). In that case it might be
>> worthwhile keeping __keycache but flagging it as needing to be sorted
>> again next time it is used. Given that Python's sort is very fast on
>> sorted or nearly sorted lists this could provide a worthwhile speedup
>> for cases where the values change but the keys don't change often.
> 
> More flexibly, keep a set of inserted keys that haven't yet been
> included in the sorted list, and a set of deleted keys that haven't
> yet been removed from the sorted list. The cache is invalid if either
> of these sets are empty - and to make it valid you can choose what to
> do based on the sizes of the two sets (and the sorted list). For
> instance, if there's just been one insertion you're probably better
> doing an insertion rather than a full resort. Of course, there's a few
> nasty cases here but it's always possible to just throw away the
> sorted list and reconstruct it from the dict keys when things get too
> hairy (eg, the user deletes a key that's in the inserted-but-not-yet-
> sorted set).
> 

Yes that sounds good. Did you mean 'The cache is invalid if either of
these sets is not empty'?

If you delete a key which is in the inserted set you can simply delete 
it from the inserted set. The inserted set can be added to sorted list
simply by appending and sorting, and the deleted keys can be removed
with a list comprehension. The only other thing you need is to catch
when the sort key has changed: a public method to request a resort would
handle this (but of course it wouldn't actually resort until it needed
the sorted keys again.)

Mark's sortteddict.py modified to avoid calling __invalidate_key (and 
__repr__ also implemented):

------------ sorteddict.py -------------
#!/usr/bin/env python
# Copyright (c) 2007 Qtrac Ltd. All rights reserved.
# This module is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or (at
# your option) any later version.
# The API and implementation are based on ideas from Paul Hankin writing
# on comp.lang.python.

"""
A dictionary that is sorted by key or by the given cmp or key function.

Provides a dictionary with the same methods and behavior as a standard
dict and that can be used as a drop-in replacement for a dict (apart
from the constructor), but which always returns iterators and lists
(whether of keys or values) in sorted order. It does not matter when
items are inserted or when removed, the items in the sorteddict are
always returned in sorted order. The ordering is implicitly based on the
key's __lt__() (or failing that __cmp__()) method if no cmp or key
function is given.

The main benefit of sorteddicts is that you never have to explicitly
sort.

One use case is where you have a set of objects that you want to make
available in various sorted orders. You could, of course, sort on demand,
but if the number of objects is very large (and if you're prepared to
sacrifice some memory), it may be faster to use a sorteddict. For
example:

>>> class PrimeMinister:
...    def __init__(self, forename, surname, elected):
...        self.forename = forename
...        self.surname = surname
...        self.elected = elected
>>> byForename = sorteddict(key=lambda pm: (pm.forename, pm.surname))
>>> bySurname = sorteddict(key=lambda pm: (pm.surname, pm.forename))
>>> byName = sorteddict(key=lambda pm: (pm.surname, pm.forename,
...                                     pm.elected), reverse=True)
>>> byElected = sorteddict(key=lambda pm: pm.elected)
>>> for forename, surname, elected in (
...         ("Ramsay", "MacDonald", "1924-01-22"),
...         ("Arthur", "Balfour", "1902-07-11"),
...         ("Herbert Henry", "Asquith", "1908-04-07"),
...         ("Stanley", "Baldwin", "1924-11-04"),
...         ("David", "Lloyd George", "1916-12-07"),
...         ("Andrew", "Bonar Law", "1922-10-23"),
...         ("Henry", "Campbell-Bannerman", "1905-12-05"),
...         ("Stanley", "Baldwin", "1923-05-23"),
...         ("Ramsay", "MacDonald", "1929-06-05")):
...     pm = PrimeMinister(forename, surname, elected)
...     byForename[pm] = pm
...     bySurname[pm] = pm
...     byName[pm] = pm
...     byElected[pm] = pm
>>> [pm.forename for pm in byForename.values()]
['Andrew', 'Arthur', 'David', 'Henry', 'Herbert Henry', 'Ramsay', \
'Ramsay', 'Stanley', 'Stanley']
>>> [pm.surname for pm in bySurname.values()]
['Asquith', 'Baldwin', 'Baldwin', 'Balfour', 'Bonar Law', \
'Campbell-Bannerman', 'Lloyd George', 'MacDonald', 'MacDonald']
>>> ["%s %s %s" % (pm.forename, pm.surname, pm.elected) \
     for pm in byName.values()]
['Ramsay MacDonald 1929-06-05', 'Ramsay MacDonald 1924-01-22', \
'David Lloyd George 1916-12-07', 'Henry Campbell-Bannerman 1905-12-05', \
'Andrew Bonar Law 1922-10-23', 'Arthur Balfour 1902-07-11', \
'Stanley Baldwin 1924-11-04', 'Stanley Baldwin 1923-05-23', \
'Herbert Henry Asquith 1908-04-07']
>>> ["%s %s %s" % (pm.forename, pm.surname, pm.elected) \
     for pm in byElected.values()]
['Arthur Balfour 1902-07-11', 'Henry Campbell-Bannerman 1905-12-05', \
'Herbert Henry Asquith 1908-04-07', 'David Lloyd George 1916-12-07', \
'Andrew Bonar Law 1922-10-23', 'Stanley Baldwin 1923-05-23', \
'Ramsay MacDonald 1924-01-22', 'Stanley Baldwin 1924-11-04', \
'Ramsay MacDonald 1929-06-05']

Thanks to Python's object references, even though there are four
sorteddicts referring to the same PrimeMinister objects, only one instance
of each object is held in memory.

>>> files = ["README.txt", "readme", "MANIFEST", "test.py"]
>>> d = sorteddict([(name, name) for name in files],
...                cmp=lambda a, b: cmp(a.lower(), b.lower()))
>>> d.keys()
['MANIFEST', 'readme', 'README.txt', 'test.py']

Here are a few tests for some of the base class methods that are not
reimplemented:

>>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
>>> d.get("X", 21)
21
>>> d.get("i")
4
>>> d.has_key("a")
True
>>> d.has_key("x")
False
>>> "a" in d
True
>>> "x" in d
False
>>> len(d)
6
>>> del d["n"]
>>> del d["y"]
>>> len(d)
4
>>> d.clear()
>>> len(d)
0
>>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
>>> d["i"]
4
>>> d["y"]
6
>>> d["z"]
Traceback (most recent call last):
...
KeyError: 'z'
"""

__author__ = "Mark Summerfield"
__version__ = "1.1.0"


class sorteddict(dict):
    """A dictionary that is sorted by key or by the given cmp or key function.

    The sorteddict always returns any list or iterator in sorted order.
    For best performance prefer a key argument to a cmp one. If neither
    is given __lt__() (falling back to __cmp__()) will be used for
    ordering.

    This particular implementation has reasonable performance if the
    pattern of use is: lots of edits, lots of lookups, ..., but gives
    its worst performance if the pattern of use is: edit, lookup, edit,
    lookup, ..., in which case using a plain dict and sorted() will
    probably be better.
    
    If you want to initialize with a dict, either use
    sorteddict(dict(...), ...), or create the sorteddict and then call
    update with the arguments normally passed to a dict constructor.
    """

    def __init__(self, iterable=None, cmp=None, key=None, reverse=False):
        """Initializes the sorteddict using the same arguments as sorted()

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> d.items()
        [('a', 2), ('i', 4), ('n', 3), ('s', 1), ('t', 5), ('y', 6)]
        >>> str(sorteddict())
        '{}'
        >>> e = sorteddict(d)
        >>> e.items()
        [('a', 2), ('i', 4), ('n', 3), ('s', 1), ('t', 5), ('y', 6)]
        """
        if iterable is None:
            iterable = []
        dict.__init__(self, iterable)
        self.__cmp = cmp
        self.__key = key
        self.__reverse = reverse
        self.__keycache = None
        self.__addkeys = set()
        self.__delkeys = set()

    @property
    def __keys(self):
        if self.__keycache is None:
            self.__keycache = dict.keys(self)
            self.__addkeys = set()
            self.__delkeys = set()
            self.__keycache.sort(cmp=self.__cmp, key=self.__key,
                                 reverse=self.__reverse)
        else:
            if self.__delkeys:
                delkeys = self.__delkeys
                self.__keycache = [key for key in self.__keycache if key not in delkeys]
                self.__delkeys = set()

            if self.__addkeys:
                self.__keycache += list(self.__addkeys)
                self.__addkeys = set()
                self.__keycache.sort(cmp=self.__cmp, key=self.__key,
                                     reverse=self.__reverse)
        return self.__keycache


    def __invalidate_key_cache(self):
        self.__keycache = None
        self.__addkeys = set()
        self.__delkeys = set()

    def __addkey(self, key):
        if key in self.__delkeys:
            del self.__delkeys[key]
        else:
            self.__addkeys.add(key)

    def __removekey(self, key):
        if key in self.__addkeys:
            del self.__addkeys[key]
        else:
            self.__delkeys.add(key)

    def update(self, *args, **kwargs):
        """Updates the sorteddict using the same arguments as dict

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5))
        >>> d.update(a=4, z=-4)
        >>> d.items()
        [('a', 4), ('i', 4), ('n', 3), ('s', 1), ('t', 5), ('z', -4)]
        >>> del d["a"]
        >>> del d["i"]
        >>> d.update({'g': 9}, a=1, z=3)
        >>> d.items()
        [('a', 1), ('g', 9), ('n', 3), ('s', 1), ('t', 5), ('z', 3)]
        >>> e = sorteddict(dict(p=4, q=5))
        >>> del d["a"]
        >>> del d["n"]
        >>> e.update(d)
        >>> e.items()
        [('g', 9), ('p', 4), ('q', 5), ('s', 1), ('t', 5), ('z', 3)]
        """
        self.__invalidate_key_cache()
        dict.update(self, *args, **kwargs)


    @classmethod
    def fromkeys(cls, iterable, value=None):
        """A class method that returns an sorteddict whose keys are
        from the iterable and each of whose values is value

        >>> d = sorteddict()
        >>> e = d.fromkeys("KYLIE", 21)
        >>> e.items()
        [('E', 21), ('I', 21), ('K', 21), ('L', 21), ('Y', 21)]
        >>> e = sorteddict.fromkeys("KYLIE", 21)
        >>> e.items()
        [('E', 21), ('I', 21), ('K', 21), ('L', 21), ('Y', 21)]
        """
        dictionary = cls()
        for key in iterable:
            dictionary[key] = value
        return dictionary


    def copy(self):
        """Returns a shallow copy of this sorteddict

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> e = d.copy()
        >>> e.items()
        [('a', 2), ('i', 4), ('n', 3), ('s', 1), ('t', 5), ('y', 6)]
        >>> d = sorteddict()
        >>> e = d.copy()
        >>> e.items()
        []
        """
        return sorteddict(dict.copy(self), cmp=self.__cmp,
                          key=self.__key, reverse=self.__reverse)


    def clear(self):
        """Removes every item from this sorteddict

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> len(d)
        6
        >>> d.clear()
        >>> len(d)
        0
        >>> d["m"] = 3
        >>> d["a"] = 5
        >>> d["z"] = 7
        >>> d["e"] = 9
        >>> d.keys()
        ['a', 'e', 'm', 'z']
        """
        self.__invalidate_key_cache()
        dict.clear(self)


    def setdefault(self, key, value):
        """If key is in the dictionary, returns its value;
        otherwise adds the key with the given value which is also
        returned

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> d.setdefault("n", 99)
        3
        >>> d.values()
        [2, 4, 3, 1, 5, 6]
        >>> d.setdefault("r", -20)
        -20
        >>> d.items()[2:]
        [('n', 3), ('r', -20), ('s', 1), ('t', 5), ('y', 6)]
        >>> d.setdefault("@", -11)
        -11
        >>> d.setdefault("z", 99)
        99
        >>> d.setdefault("m", 50)
        50
        >>> d.keys()
        ['@', 'a', 'i', 'm', 'n', 'r', 's', 't', 'y', 'z']
        """
        if key not in self:
            self.__addkey(key)
        return dict.setdefault(self, key, value)


    def pop(self, key, value=None):
        """If key is in the dictionary, returns its value and removes it
        from the dictionary; otherwise returns the given value

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> d.pop("n")
        3
        >>> "n" in d
        False
        >>> d.pop("q", 41)
        41
        >>> d.keys()
        ['a', 'i', 's', 't', 'y']
        >>> d.pop("a")
        2
        >>> d.pop("t")
        5
        >>> d.keys()
        ['i', 's', 'y']
        """
        if key not in self:
            return value
        self.__removekey(key)
        return dict.pop(self, key, value)


    def popitem(self):
        """Returns and removes an arbitrary item from the dictionary

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> len(d)
        6
        >>> item = d.popitem()
        >>> item = d.popitem()
        >>> item = d.popitem()
        >>> len(d)
        3
        """
        item = dict.popitem(self)
        self.__removekey(item[0])
        return item


    def keys(self):
        """Returns the dictionary's keys in sorted order

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> d.keys()
        ['a', 'i', 'n', 's', 't', 'y']
        """
        return self.__keys[:]


    def values(self):
        """Returns the dictionary's values in key order

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> d.values()
        [2, 4, 3, 1, 5, 6]
        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6),
        ...               reverse=True)
        >>> d.values()
        [6, 5, 1, 3, 4, 2]
        >>> d = sorteddict(dict(S=1, a=2, N=3, i=4, T=5, y=6),
        ...                cmp=lambda a, b: cmp(a.lower(), b.lower()))
        >>> d.keys()
        ['a', 'i', 'N', 'S', 'T', 'y']
        """
        return [self[key] for key in self.__keys]


    def items(self):
        """Returns the dictionary's items in key order

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> d.items()
        [('a', 2), ('i', 4), ('n', 3), ('s', 1), ('t', 5), ('y', 6)]
        """
        return [(key, self[key]) for key in self.__keys]


    def __iter__(self):
        """Returns an iterator over the dictionary's keys

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> list(d)
        ['a', 'i', 'n', 's', 't', 'y']
        """
        return iter(self.__keys)


    def iterkeys(self):
        """Returns an iterator over the dictionary's keys

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> list(d)
        ['a', 'i', 'n', 's', 't', 'y']
        """
        return iter(self.__keys)


    def itervalues(self):
        """Returns an iterator over the dictionary's values in key order

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> list(d.itervalues())
        [2, 4, 3, 1, 5, 6]
        """
        for key in self.__keys:
            yield self[key]


    def iteritems(self):
        """Returns an iterator over the dictionary's values in key order

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> list(d.iteritems())
        [('a', 2), ('i', 4), ('n', 3), ('s', 1), ('t', 5), ('y', 6)]
        """
        for key in self.__keys:
            yield key, self[key]


    def __delitem__(self, key):
        """Deletes the item with the given key from the dictionary

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> del d["s"]
        >>> del d["y"]
        >>> del d["a"]
        >>> d.keys()
        ['i', 'n', 't']
        """
        self.__removekey(key)
        dict.__delitem__(self, key)


    def __setitem__(self, key, value):
        """If key is in the dictionary, sets its value to value;
        otherwise adds the key to the dictionary with the given value

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> d["t"] = -17
        >>> d["z"] = 43
        >>> d["@"] = -11
        >>> d["m"] = 22
        >>> d["r"] = 5
        >>> d.keys()
        ['@', 'a', 'i', 'm', 'n', 'r', 's', 't', 'y', 'z']
        """
        if key not in self:
            self.__addkey(key)
        dict.__setitem__(self, key, value)


    def __repr__(self):
        """
        >>> sorteddict()
        sorteddict()
        >>> sorteddict({'a':1})
        sorteddict({'a': 1})
        >>> def comparison(a,b): return cmp(a,b)
        >>> def keyfn(a): return a
        >>> sorteddict({'a':1}, cmp=comparison) #doctest: +ELLIPSIS
        sorteddict({'a': 1}, cmp=<function comparison at ...>)
        >>> sorteddict({'a':1}, key=keyfn, reverse=True) #doctest: +ELLIPSIS
        sorteddict({'a': 1}, key=<function keyfn at ...>, reverse=True)
        """
        args = []
        if self:

            args.append(dict.__repr__(self))
        if self.__cmp is not None:
            args.append('cmp=%r' % self.__cmp)
        if self.__key is not None:
            args.append('key=%r' % self.__key)
        if self.__reverse is not False:
            args.append('reverse=%r' % self.__reverse)
        return "%s(%s)" % (self.__class__.__name__, ', '.join(args))


    def __str__(self):
        """Returns a human readable string representation of the
        dictionary
        
        The returned string is proportional in size to the number of
        items so could be very large.

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5))
        >>> str(d)
        "{'a': 2, 'i': 4, 'n': 3, 's': 1, 't': 5}"
        >>> d = sorteddict({2: 'a', 3: 'm', 1: 'x'})
        >>> str(d)
        "{1: 'x', 2: 'a', 3: 'm'}"
        """
        return "{%s}" % ", ".join(
               ["%r: %r" % (key, self[key]) for key in self.__keys])


if __name__ == "__main__":
    import doctest
    doctest.testmod()

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


From attn.steven.kuo at gmail.com  Tue Sep 11 02:12:32 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: Mon, 10 Sep 2007 23:12:32 -0700
Subject: function to do dynamic import?
In-Reply-To: <13ecb84p1ghrd64@corp.supernews.com>
References: <13ecb84p1ghrd64@corp.supernews.com>
Message-ID: <1189491152.601490.33880@o80g2000hse.googlegroups.com>

On Sep 10, 10:52 pm, "bambam" <da... at asdf.asdf> wrote:
> import works in the main section of the module, but does
> not work as I hoped when run inside a function.
>
> That is, the modules import correctly, but are not visible to
> the enclosing (global) scope.
>
> Questions:
> (1) Where can I read an explanation of this?
> (2) Is there a work around?
>
> BTW, sys.modules("filename") shows that the module is
> loaded, I just don't know how to use it when loaded that
> way.  Also, if I import again at the global scope, the module
> name becomes available.
>
> Steve.



(snipped)

This was recently discussed:

    http://groups.google.com/group/comp.lang.python/msg/f6fcdf49710cb833

--
Hope this helps,
Steven



From perl4hire at softouch.on.ca  Thu Sep 13 03:59:31 2007
From: perl4hire at softouch.on.ca (Amer Neely)
Date: Thu, 13 Sep 2007 03:59:31 -0400
Subject: Coming from Perl
In-Reply-To: <1189644803.816375.269950@y42g2000hsy.googlegroups.com>
References: <Cv%Fi.198$372.59@read2.cgocable.net>
	<1189644803.816375.269950@y42g2000hsy.googlegroups.com>
Message-ID: <b46Gi.221$372.100@read2.cgocable.net>

TheFlyingDutchman wrote:
> On Sep 12, 5:30 pm, Amer Neely <perl4h... at softouch.on.ca> wrote:
>> I'm a complete newbie with Python, but have several years experience
>> with Perl in a web environment.
>>
>> A question I have, if someone here is familiar with Perl, does Python
>> have something like Perl's 'here document'? I've just searched and read
>> some postings on generating HTML but they all seem to refer to various
>> template utilities. Is this the only way, or am I missing something? I'm
>> used to generating X/HTML by hand, which makes the here document in Perl
>> ideal for me. Also, many times a client already existing HTML code that
>> I can use in a script.
>>
>> --
>> Amer Neely
>> w:www.webmechanic.softouch.on.ca/
>> Perl | MySQL programming for all data entry forms.
>> "Others make web sites. We make web sites work!"
> 
> I am not sure if this is what you are looking for, but Python has a
> special string with 3 quotes that I believe duplicates part of the
> functionality of a here document:
> 
> myHmtlHeader = """
> <head attribute = "abc">
> <title>My Page</title>
> </head>
> """
> 
> print myHtmlHeader
> 
> 
> outputs:
> 
> 
> <head attribute="abc">
> <title>My Page</title>
> </head>
> 

Well, I have checked everything I can but I'm getting '500 Internal 
Server Error'. The log files aren't helpful:
[Thu Sep 13 03:43:00 2007] [error] [client 24.235.184.39] Premature end 
of script headers: /home/softouch/public_html/cgi-bin/scratch/hello.py

I can't even get it to run on my home PC running Apache + Win2K. Same error.

My script:
#!/usr/bin/python
import cgitb; cgitb.enable(display=0, logdir=".")
import sys
sys.stderr = sys.stdout
print "Content-Type: text/html"
print

print """
<html>
<body>
<div align="center"><font style="font-family:verdana; size:18px">Hello 
from Python</font></div>
<br>
Goodbye.
</body>
</html>
"""

-- 
Amer Neely
w: www.webmechanic.softouch.on.ca/
Perl | MySQL programming for all data entry forms.
"Others make web sites. We make web sites work!"


From Shawn at Milochik.com  Tue Sep 18 14:42:30 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Tue, 18 Sep 2007 14:42:30 -0400
Subject: Newbie question
In-Reply-To: <1190140395.567419.16280@k79g2000hse.googlegroups.com>
References: <1190139661.046103.45440@19g2000hsx.googlegroups.com>
	<mailman.732.1190140272.2658.python-list@python.org>
	<1190140395.567419.16280@k79g2000hse.googlegroups.com>
Message-ID: <2dc0c81b0709181142h4cfd4071o4a555002a6e44e76@mail.gmail.com>

On 9/18/07, koutoo at hotmail.com <koutoo at hotmail.com> wrote:
> On Sep 18, 1:31 pm, "Shawn Milochik" <Sh... at Milochik.com> wrote:
> > On 9/18/07, kou... at hotmail.com <kou... at hotmail.com> wrote:
> >
> > > If I have a file name: AVC1030708.14.  How do I strip out certain
> > > characters from the file name?  I am so used to using MID, LEFT, and
> > > RIGHT functions, that I have no idea how to do this in python?  I have
> > > had trouble as well with most newbies on finding the help.  But I have
> > > used the command line built in help, but with no luck.  Thanks.
> >
> > > Kou
> >
> > Do you want to strip out specific characters, characters in specific
> > positions, or characters matching certain patterns?
>
> Yes, I want specific characters in specific positions.
>

Try this:

newString = oldString[0:3] + oldString[5:10]

Some other quick examples:

>>> test = "this is a test"
>>> test
'this is a test'
>>> fred = test[:3] + test[9:]
>>> fred
'thi test'
>>> test[0:5]
'this '
>>> test[:5]
'this '
>>> test[4:]
' is a test'


From ldo at geek-central.gen.new_zealand  Sat Sep  8 01:14:00 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 08 Sep 2007 17:14:00 +1200
Subject: platform system may be Windows or Microsoft since Vista
References: <1188578878.264671.296440@k79g2000hse.googlegroups.com>
	<1188584386.174981.168040@z24g2000prh.googlegroups.com>
	<1188661487.176167.32600@57g2000hsv.googlegroups.com>
	<1189179369.101809.298360@g4g2000hsf.googlegroups.com>
Message-ID: <fbtb2o$nbh$3@lust.ihug.co.nz>

In message <1189179369.101809.298360 at g4g2000hsf.googlegroups.com>, 
p.lavarre at ieee.org wrote:

> I'm thinking no priority because there is no fixing this.

Why are you bothering to check an informational string? Why not check
directly for the functionality you need?


From larry.bates at websafe.com  Mon Sep 24 12:31:11 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Mon, 24 Sep 2007 11:31:11 -0500
Subject: Converting numbers to unicode charaters
In-Reply-To: <1190641342.127770.115610@y42g2000hsy.googlegroups.com>
References: <1190641342.127770.115610@y42g2000hsy.googlegroups.com>
Message-ID: <ofqdnQZyzZjRe2rbnZ2dnUVZ_gmdnZ2d@comcast.com>

How about:

ord=''.join([unichr(int(x,16)) for x in hexs])

I don't know if its faster, but I'll bet it is.

-Larry

byte8bits at gmail.com wrote:
> Here's how I'm doing this right now, It's a bit slow. I've just got
> the code working. I was wondering if there is a more efficient way of
> doing this... simple example from interactive Python:
> 
>>>> word = ''
>>>> hexs = ['42', '72', '61', '64']
>>>> for h in hexs:
> ...   char = unichr(int(h, 16))
> ...   word += char
> ...   print char
> ...
> B
> r
> a
> d
>>>> print word
> Brad
> 
> 
> Each hex_number is two digits. unichr converts that to a character
> that I append to previous ints that have been converted to chars. In
> this way, I convert a string of hex numbers to ints to letters, to
> words.
> 
> Perhaps I'm doing it wrong... any tips?
> 
> Thanks,
> Brad
> 


From __peter__ at web.de  Wed Sep 19 07:55:53 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 19 Sep 2007 13:55:53 +0200
Subject: Help for Otsu implementation from C
References: <1190201086.468348.274850@g4g2000hsf.googlegroups.com>
Message-ID: <fcr2o9$l32$03$1@news.t-online.com>

azrael wrote:

> Can somone look at this

> def otsu(hi):
>     fmax=-1.0
>     border=len(hi)
>     for i in range(border):
>         if hi[i]!=0:break
>     for j in range(border-1,0-1,-1):
>         if hi[j] != 0:break
>     s = sum([k*hi[k] for k in range(border)]) n = sum(hi) #
>     product(im.size)
>     n1=n2=csum=0.0
>     for k in range(i,j):
>         n1 += hi[k]
>         n2  = n - n1
>         csum+= k * hi[k]
>         m1 = csum/ n1
>         m2 = (s - csum)/n2

As I said in my previous post, try replacing this line

>         sb = n1 * n2 * (m2 - m1)

with the original

          sb = n1 * n2 * (m1 - m2) * (m1 - m2)

that has been commented out.

>         if sb > fmax:
>             fmax = sb
>             V=k+1
>     print V

> I try to implement it from C from this location.

Personally, I would start with a literal translation and not try to
improve it until it works.

Peter


From stephen.lewitowski at googlemail.com  Mon Sep 10 18:44:09 2007
From: stephen.lewitowski at googlemail.com (stephen.lewitowski at googlemail.com)
Date: Mon, 10 Sep 2007 15:44:09 -0700
Subject: Generating a unique identifier
In-Reply-To: <13e2fgbbpsatm39@corp.supernews.com>
References: <13e2fgbbpsatm39@corp.supernews.com>
Message-ID: <1189464249.600013.152290@r34g2000hsd.googlegroups.com>

On Sep 7, 1:03 pm, Steven D'Aprano <st... at REMOVE-THIS-
cybersource.com.au> wrote:
> I have an application that will be producing many instances, using them
> for a while, then tossing them away, and I want each one to have a unique
> identifier that won't be re-used for the lifetime of the Python session.
>
> I can't use the id() of the object, because that is only guaranteed to be
> unique during the lifetime of the object.
>
> For my application, it doesn't matter if the ids are predictable, so I
> could do something as simple as this:
>
> def unique_id():
>     n = 1234567890
>     while True:
>         yield n
>         n += 1
>
> unique_id = unique_id()
>
> while Application_Is_Running:
>     make_an_object(id=unique_id())
>     do_stuff_with_objects()
>     delete_some_of_them()
>
> which is easy enough, but I thought I'd check if there was an existing
> solution in the standard library that I missed. Also, for other
> applications, I might want them to be rather less predictable.
>
> --
> Steven.

This is very simple. Use a class variable that increments every time a
new object is created. If you need to use it in a number of different
types of object then you could use the code below in a metaclass and
tag all of your classes with the metaclass. Unless you are making
billions of objects then i think that this should suffice.

class MyObj:
   id_count = 0
   def __init__(self):
      self.id = self.id_count
      MyObj.id_count += 1
      print self.id, MyObj.id_count

MyObj()
MyObj()



From guruyaya at gmail.com  Mon Sep 17 15:33:56 2007
From: guruyaya at gmail.com (guruyaya)
Date: Mon, 17 Sep 2007 12:33:56 -0700
Subject: python libs for MinGW
In-Reply-To: <1190024517.087476.311460@n39g2000hsh.googlegroups.com>
References: <1190022847.857960.17720@19g2000hsx.googlegroups.com>
	<1190024517.087476.311460@n39g2000hsh.googlegroups.com>
Message-ID: <1190057636.011676.103870@d55g2000hsg.googlegroups.com>

Great! I've found this link
http://bonsai.ims.u-tokyo.ac.jp/~mdehoon/software/python/cygwin.html
it has libpython23.def and libpython23.a all set and ready to go.
Thanks anyway! Hope I could help someone.



From steve at holdenweb.com  Thu Sep 27 11:35:27 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 27 Sep 2007 11:35:27 -0400
Subject: making run time changes..
In-Reply-To: <000001c80107$4f9ff120$eedfd360$@iitk.ac.in>
References: <000001c80107$4f9ff120$eedfd360$@iitk.ac.in>
Message-ID: <fdgiju$516$2@sea.gmane.org>

Piyush Jain wrote:
> Hi,
> 
> I am new(almost) to python. I wish to making a server in which I can 
> make changes at run time. For example , add a method to a 
> class/attribute to object etc. by sending it messages.
> 
> Can anyone help me with what features to look into and how to go about 
> it. Are there any similar projects?
> 
Take a look at Pyro (Python remote objects). It can almost certainly do 
what you want.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From attn.steven.kuo at gmail.com  Thu Sep  6 13:56:33 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: Thu, 06 Sep 2007 17:56:33 -0000
Subject: Help setting default class attributes
In-Reply-To: <1189099594.432512.278950@22g2000hsm.googlegroups.com>
References: <1189099594.432512.278950@22g2000hsm.googlegroups.com>
Message-ID: <1189101393.484939.216840@g4g2000hsf.googlegroups.com>

On Sep 6, 10:26 am, rh0dium <steven.kl... at gmail.com> wrote:
> Hi all,
>
> I have the following piece of code and I wanted to set the default
> attributes based on a dictionary. What I am looking for is a way to
> take PIPODEFAULTS and assign each one as an attribute for the class
> pipo.  Can someone show me how to do this by iterating over the
> PIPODEFAULTS and assign them.  What I would expect to be able to do is
> call the class and modify them.
>
> example:
> a = pipo()
> print a.caseSensitivity
> "preserve"
>
> a.caseSensitivity = "lower"
> print a.caseSensitivity
> "lower"
>


I infer from your example that you want
to set default attributes for *instances of* class pipo
(not for class pipo itself).

Use setattr:

class pipo(object):
    PIPODEFAULTS = {'caseSensitivity':'preserve',
        'cellMapTable':'checkPolygon', # etc
    }
    def __init__(self, *args, **kwargs):
        for attr, value in pipo.PIPODEFAULTS.iteritems():
            setattr(self, attr, value)

a = pipo()
b = pipo()
print a.caseSensitivity
a.caseSensitivity = 'lower'
print a.caseSensitivity
print b.caseSensitivity

--
Hope this helps,
Steven




From namesagame-usenet at yahoo.com  Thu Sep 13 00:27:17 2007
From: namesagame-usenet at yahoo.com (gamename)
Date: Wed, 12 Sep 2007 21:27:17 -0700
Subject: Python+Expect+Win32 = Not Possible?
Message-ID: <1189657637.539038.317280@k79g2000hse.googlegroups.com>

Hi,

Is it still the case there is no practical Expect-like module for
win32? I know that cygwin can support pexpect, but that isn't an
option here --- I have to use a native win32 Python version.

Are there alternatives, or is it simply not an option to replicate
Expect on win32 with python?

All I'm trying to do is start a couple processes, wait for each to say
"done" on stdout and then quit (or timeout if something went wrong).

TIA,
-T



From paddy3118 at googlemail.com  Tue Sep 25 02:59:13 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Tue, 25 Sep 2007 06:59:13 -0000
Subject: Making a small change to a large XML document
In-Reply-To: <pan.2007.09.24.22.38.37.790708@gmail.com>
References: <pan.2007.09.24.22.38.37.790708@gmail.com>
Message-ID: <1190703553.516445.98080@22g2000hsm.googlegroups.com>

On Sep 24, 11:38 pm, Dan Stromberg <dstrombergli... at gmail.com> wrote:
> Say I want to take an existing XML document, and change the value="9997"
> and value="9998" to two different numbers, without changing any of the
> rest of the document - not even changing comments or indentation, if
> avoidable.
>
> What's the best way of doing it in python?
>
>   <bean id="cs" class="c.d.q.s.C">
>     <property name="p" value="9997"/>
>     <property name="mP" value="9998"/>
>     <property name="g" value="cs"/>
>     <property name="e" value="t"/>
>   </bean>
>
> My .xml file is full of such beans.
>
> I've played around with minidom a little in the past, and I'm targetting
> python 2.5.1.
>
> Thanks!

If it was machine formatted, regular XML, on a unix box then I'd use
sed:

  sed -e 's/value="9997"/value="zzz"/g;s/value="9998"/value="ZZZ"/g' \
    infile > outfile

It would work for what you said, but if other modifications are
needed
then it is short enough to throw away if necessary and write a larger
script in Python.

- Paddy.



From nfrancken at gmail.com  Thu Sep  6 17:32:08 2007
From: nfrancken at gmail.com (windandwaves)
Date: Thu, 06 Sep 2007 14:32:08 -0700
Subject: why should I learn python
Message-ID: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>

Can someone tell me why I should learn python?  I am a webdeveloper,
but I often see Python mentioned and I am curious to find out what I
am missing out on.

Thank you

Nicolaas



From junchi.tang at gmail.com  Thu Sep 20 11:31:25 2007
From: junchi.tang at gmail.com (junchi.tang at gmail.com)
Date: Thu, 20 Sep 2007 08:31:25 -0700
Subject: os.path.getmtime() and compare with a date type
Message-ID: <1190302285.127448.288010@22g2000hsm.googlegroups.com>

Hi,
I am new to python and are tryint to write a simple program delete log
files that are older than 30 days.

So I used os.path.getmtime(filepath) and compare it with a date but it
does not compile.

threshold_time = datetime.date.today() - datetime.timedelta(days=30)
mod_time = os.path.getmtime(file_path)

if( mod_time < threshold_time):
         #delete file

However the interpreter complains at the if line, say "can't comapre
datetime.date to int

How can I covert one of them to make it work?

Thank you!



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Sep 20 12:51:06 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 20 Sep 2007 18:51:06 +0200
Subject: Lookup values from one table to another based on a value
In-Reply-To: <1190305331.584560.218880@g4g2000hsf.googlegroups.com>
References: <1190298876.689060.44540@d55g2000hsg.googlegroups.com>
	<46f2930a$0$9505$426a74cc@news.free.fr>
	<1190305331.584560.218880@g4g2000hsf.googlegroups.com>
Message-ID: <46f2a4e6$0$15456$426a74cc@news.free.fr>

koutoo at hotmail.com a ?crit :
> On Sep 20, 10:34 am, Bruno Desthuilliers <bruno.
> 42.desthuilli... at wtf.websiteburo.oops.com> wrote:
>> kou... at hotmail.com a ?crit :
(snip)
>>> Normally in Access I would just use a Dlookup and be done with it, or
>>> use a Recordset in VB.  Thanks guys.

>> What about using a database ? Like SQLite ?
> 
> Ah, yes, that would appear to be a better means to retrieve data.  I
> visited the site, which version should I download?  Thanks.

The latest, unless you have reasons to choose an old one !-)



From kevinar18 at hotmail.com  Mon Sep 17 21:53:25 2007
From: kevinar18 at hotmail.com (Kevin Ar18)
Date: Mon, 17 Sep 2007 21:53:25 -0400
Subject: Looking for web software in Python.
Message-ID: <BLU110-W319059A993A1EA5197709EAAB80@phx.gbl>


Are any of the following pieces of web software available in Python (under a non-copyleft license like BSD or MIT or Python license)?


Mailing list - with web accessable archive and list maintenance.
Source control
Wiki System

Again, only non-copyleft licenses like MIT, BSD, or public domain.


Or would I be better off with PHP?



BTW, does anyone know where that project is that was working on a forum made with Python?
_________________________________________________________________
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From nutsbreaker2 at gmail.com  Wed Sep 26 13:52:32 2007
From: nutsbreaker2 at gmail.com (nutsbreaker2 at gmail.com)
Date: Wed, 26 Sep 2007 10:52:32 -0700
Subject: Guitars for 0$ !!!!!
Message-ID: <1190829152.350303.280950@o80g2000hse.googlegroups.com>

http://free-guitars.blogspot.com/



From iddw at hotmail.com  Wed Sep 12 09:33:38 2007
From: iddw at hotmail.com (Dave Hansen)
Date: Wed, 12 Sep 2007 06:33:38 -0700
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
Message-ID: <1189604018.520338.162520@57g2000hsv.googlegroups.com>

On Sep 12, 5:21 am, Charles Fox <charles.... at gmail.com> wrote:
> I've just started playing around with Python, as a possible
> replacement for a mix of C++, Matlab and Lisp.  The language looks
> lovely and clean with one huge exception:  I do a lot of numerical
> modeling, so I deal with objects (like neurons) described
> mathematically in papers, by equations like
>     a_dot = -k(a-u)
> In other languages, this translates nicely into code, but as far as I
> can tell, Python needs the ugly:
>     self.a_dot = -self.k(self.a-self.u)
> For large equations this is going to make my code seriously unreadable
> to the point of needing to switch back to Matlab -- and it seems to go
> against everything else about python's simplicity and elegance.  Am I

It goes back to the Zen of Python (import this): Explicit is better
than implicit.  And it's a boon to future maintainers of your code

> missing something?  Is there something like a 'with' command that lets
> me set the scope, like
>
>     with self:
>       .a_dot = -.k(.a-.u)

The name "self" is just a convention.  You can give it any name you
wish.  Using "s" is common.

As others have mentioned, you can also provide local synonyms if the
dot syntax is too onerous.  But make sure you use the member access
syntax if the result of an expression is an immutable type.  For
example, I assume a_dot is a mutable type, such as a list.  If so,
then you could simply use

   a_dot, k, a, u = self.a_dot, self.k, self.a, self.u
   a_dot = -k(a-u)

However, if it's an immutable type, such as a scalar, strung, or
tuple, you need

   self.a_dot = -k(a-u)

And it gets trickier if you have members taking intermediate values...

>
> It's premature to make language suggestions as I am new to the

That's for sure  ;-)

Regards,

   -=Dave



From mail at timgolden.me.uk  Wed Sep  5 09:10:03 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Wed, 05 Sep 2007 14:10:03 +0100
Subject: StringIO MySQL data blob Image problem
In-Reply-To: <e75321bd0709050553h5e3302f7lf59f10104895ff5d@mail.gmail.com>
References: <e75321bd0709050553h5e3302f7lf59f10104895ff5d@mail.gmail.com>
Message-ID: <46DEAAAB.8040008@timgolden.me.uk>

dimitri pater wrote:
> I am trying to insert an image, which is stored as a blob in MySQL,
> into a table using Reportlab.

[... snip stuff involving StringIO and getvalue / tostring etc. ...]

> This is also the string I see in the table, in stead of the actual image.

[.. snip more stuff ...]

> that returns:
> ?????lbo?q?5???\???????Y|A???,?????"??m3Z???f??""N?,?????I??t"?b5?@xq?'?k????s??d???????1???
> ?^?J?*?C(r)?{:t??_??????jo??
> ?C(c)???[)?gN???X?i etc... etc...
> and return an UnicodeDecodeError when I try to insert this into the table

Well, I'm mystified. Not by your results: that exactly what I
expected to get, but because you're doing everything *except*
manipulating an image and putting it into a PDF via ReportLab.

Just in case you're under any other impression, there's no such
thing as "a graphical image" in a database or in computer memory.
There's just a bunch of bytes which -- given the right libraries
-- can be represented as an image. Given other libraries, such
as the ones which print them to a text console, they can be
represented as a stream of apparent gibberish. You need to
use the former; you're using the latter.

It's a while since I did anything with ReportLab but I seem to
remember that you can pass it an image filename and, (possibly
as long as you have the Python Imaging Library installed),
it will insert it into the PDF you're building as a flowable.

Assuming I'm right, get hold of the bytes in your MySQL query,
save them as "temp.jpg" or whatever, and then pass that filename
along to ReportLab. Feel free to come back and ask if those
instructions aren't clear enough.

TJG


From steve at holdenweb.com  Wed Sep 26 19:11:14 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 26 Sep 2007 19:11:14 -0400
Subject: regex with specific list of string
In-Reply-To: <1190847411.999166.87060@w3g2000hsg.googlegroups.com>
References: <1190821357.753909.178210@50g2000hsm.googlegroups.com>	<fde2i4$9k1$1@sea.gmane.org>	<1190827835.3397.76.camel@dot.uniqsys.com>	<mailman.1126.1190830418.2658.python-list@python.org>
	<1190847411.999166.87060@w3g2000hsg.googlegroups.com>
Message-ID: <fdeoug$o3i$1@sea.gmane.org>

james_027 wrote:
> Hi all,
> 
>> This is fine IMO since the OP didn't specify the opposite.
>>
> 
> Thanks for all your replies, though I don't understand quite well the
> going argument? What do you mean when you say "the OP didn't specify
> the opposite"?
> 
> There reason for using regex is because I am going to use it in
> Django's URL pattern
> 
Carsten was pointing out that the pattern I gave you would match any 
string that *began* with one of the month names, as I didn't include an 
element to force a match of the end of the string.

I did this because I assumed you were most interested in finding out how 
to match one of a number of alternate strings, and this would likely 
only be a part of your final pattern.

If you already have what you need you really don't need to pay much 
attention to the rest: it's just geeks picking nits!

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From software at ginstrom.com  Wed Sep 12 21:14:07 2007
From: software at ginstrom.com (Ryan Ginstrom)
Date: Thu, 13 Sep 2007 10:14:07 +0900
Subject: Coming from Perl
In-Reply-To: <lR%Fi.203$372.178@read2.cgocable.net>
References: <Cv%Fi.198$372.59@read2.cgocable.net><87wsuv5r83.fsf@benfinney.id.au>
	<lR%Fi.203$372.178@read2.cgocable.net>
Message-ID: <002801c7f5a3$620afc70$0203a8c0@MOUSE>

> On Behalf Of Amer Neely
> I saw that and I guess that is the closest thing. In Perl I can do ..
> 
> print <<EndHTML;
> <html>
> <body>
> Hello
> </body>
> </html>
> EndHTML

>>> data = dict(title="Python Rocks!",
	    content="<p>I heart Python</p>")
>>> template = """<html>
<head>
<title>%(title)s</title>
</head>
<body>
%(content)s
</body>
</html>"""
>>> print template % data
<html>
<head>
<title>Python Rocks!</title>
</head>
<body>
<p>I heart Python</p>
</body>
</html>
>>>

You might also want to check out string.Template
(http://docs.python.org/lib/node40.html), or even move on to one of the
many, many templating languages (Mako, Cheetah, Kid, etc.)

Regards,
Ryan Ginstrom



From steve at holdenweb.com  Thu Sep  6 17:33:55 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 06 Sep 2007 14:33:55 -0700
Subject: parsing long `To' and 'Cc' from email
In-Reply-To: <46E076F4.20704@fmed.uba.ar>
References: <46E06244.80308@fmed.uba.ar> <fbpp5h$pje$1@sea.gmane.org>
	<46E076F4.20704@fmed.uba.ar>
Message-ID: <46E07243.5070402@holdenweb.com>

Gerardo Herzig wrote:
> Steve Holden wrote:
[...]
>>>
>> Have you tried using email.utils.getaddresses()?
>>
>> regards
>>  Steve
>>  
>>
> No, i was not. And it works just perfect! One day i will make a hard 
> question!! I wonder why this getaddresess() function is not a method 
> into the HeaderParser class.
> 
> Ok, so my content-filter can continue now. Thanks Steve!

Don't thank me, thank Barry Warsaw - he wrote most of this code.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From neilscad at hotmail.com  Sat Sep 29 16:30:33 2007
From: neilscad at hotmail.com (neil)
Date: Sun, 30 Sep 2007 09:30:33 +1300
Subject: python 2.5 and 3gb switch
References: <fdkan6$ne0$1@aioe.org> <fdkfqb$qr$1@daisy.noc.ucla.edu>
	<fdkq8g$vj2$1@aioe.org> <46FDF800.5030504@v.loewis.de>
	<fdl5lg$una$1@aioe.org> <46fe1e79$0$2816$9b622d9e@news.freenet.de>
	<fdlaoo$dt0$1@aioe.org>
Message-ID: <fdmclb$ich$1@aioe.org>


Since I was last here I found someone who is willing to do a 3gb python 
build for me who builds Blender as well.
I am pretty sure python is just not recognising the extra space.
Apparently there is a python module used in the 3gb Blender build I have 
that may be contributing too although the script I have requires a full 
python install.
I will see how his assistance goes.
Thanks for your willing help guys.
regards
Neil




From python at cx.hu  Tue Sep  4 16:09:56 2007
From: python at cx.hu (Ferenczi Viktor)
Date: Tue, 4 Sep 2007 22:09:56 +0200
Subject: Py3K: Ensuring future compatibility between function annotation based
	tools
Message-ID: <200709042209.56401.python@cx.hu>

There could be future compatibility issues between libraries using the new 
function annotation scheme: PEP 3107 -- Function Annotations
See also: http://www.python.org/dev/peps/pep-3107/

Let's assume two hypotetic libraries:
mashaller: provides JSON marshalling support
typechecker: provides runtime type checking

Let's write a simple function that uses both libraries:

from marshaller import marshall, JSON
from typechecker import check, Str

@marshall
@check
def splitter(s:Str) -> JSON:
    return s.split(',')

The function get a singe string and returns JSON encoded list of it's comma 
separated parts. Both libraries can be used together without problems as long 
as all arguments and the return value are annotated by at most one annotator 
object. However, there could be frequent use cases, when multiple annotations 
for a single argument or return value is required:

@marshall
@check
def splitter(s:(JSON, Str)) -> JSON:
    return s.split(',')

The above function does the same as the first one, but accepts a JSON encoded 
string. This solution works only if both libraries can cooperatively handle 
composite annotator objects and do not complain about unknown ones.
(Note, that the order of processing depends on the order of the decorators, 
not on the order of the annotators.)

Let me suggest the following recommendation for tool developers:

If you encounter a tuple as the annotator, then iterate it and process only 
the known ones while silently skipping all others. Keep all existing 
annotators if you include new ones. Create a tuple if you find an existing 
annotator and need to include a second one. Extend existing tuples by 
replacing them with new ones including new annotator(s).
(Possibly lists or dictionaries in place of tuples? I don't think so. Ideas?)

This way all annotation based tools will be compatible and should work 
seamlessly without imposing any unnecessary constraint.
Anybody with a better solution? Any comments?

Greetings, Viktor


From stargaming at gmail.com  Sun Sep 23 10:53:27 2007
From: stargaming at gmail.com (Stargaming)
Date: 23 Sep 2007 14:53:27 GMT
Subject: can I run pythons IDLE from a command line??
References: <1190475878.971841.253140@k79g2000hse.googlegroups.com>
	<mailman.926.1190476402.2658.python-list@python.org>
Message-ID: <46f67de7$0$8442$9b622d9e@news.freenet.de>

On Sat, 22 Sep 2007 17:53:09 +0200, Thomas Jollans wrote:

> On Saturday 22 September 2007, tedpottel at gmail.com wrote:
>> Hi,
>> Is their a version of pythons IDLE that will run in a dos command line?
>> The reason is that I would like to be able to run python code
>> interactively from my parable by connecting to my desktop using remote
>> command line or a telnet program.
> 
> The Python interpreter should do fine. If your PATH environment variable
> is set up correctly, just run "python", otherwise it's somewhere in your
> Python installation directory.

If you don't want to miss IDLE's advantages, `IPython <http://
ipython.scipy.org/moin/>`_ might be interesting for you.

Stargaming


From wizzardx at gmail.com  Sat Sep  8 16:35:50 2007
From: wizzardx at gmail.com (David)
Date: Sat, 8 Sep 2007 22:35:50 +0200
Subject: Organizing Code - Packages
In-Reply-To: <1189280539.449868.169910@22g2000hsm.googlegroups.com>
References: <1189177596.960379.244990@w3g2000hsg.googlegroups.com>
	<46e17143$0$6189$426a74cc@news.free.fr>
	<1189183088.922537.18290@r34g2000hsd.googlegroups.com>
	<87r6laa0ir.fsf@rudin.co.uk>
	<46e1a0bc$0$7689$9b4e6d93@newsspool2.arcor-online.net>
	<1189280539.449868.169910@22g2000hsm.googlegroups.com>
Message-ID: <18c1e6480709081335t18a91309nc647f0caa33f7272@mail.gmail.com>

> How do import statements that are declared at the top of a python
> module work?

http://docs.python.org/tut/node8.html


From stargaming at gmail.com  Thu Sep 20 09:25:41 2007
From: stargaming at gmail.com (Stargaming)
Date: 20 Sep 2007 13:25:41 GMT
Subject: frange() question
References: <fctrc1$doh$1@news.nems.noaa.gov>
Message-ID: <46f274d4$0$7146$9b622d9e@news.freenet.de>

On Thu, 20 Sep 2007 09:08:17 -0400, George Trojan wrote:

> A while ago I found somewhere the following implementation of frange():
> 
> def frange(limit1, limit2 = None, increment = 1.):
>      """
>      Range function that accepts floats (and integers). Usage:
>      frange(-2, 2, 0.1)
>      frange(10)
>      frange(10, increment = 0.5)
>      The returned value is an iterator.  Use list(frange) for a list.
>      """
>      if limit2 is None:
>          limit2, limit1 = limit1, 0.
>      else:
>          limit1 = float(limit1)
>      count = int(math.ceil(limit2 - limit1)/increment) return (limit1 +
>      n*increment for n in range(count))
> 
> I am puzzled by the parentheses in the last line. Somehow they make
> frange to be a generator:
>  >> print type(frange(1.0, increment=0.5))
> <type 'generator'>
> But I always thought that generators need a keyword "yield". What is
> going on here?
> 
> George

Consider the following:

    def foo():
        yield 1
    def bar():
        return foo()

Still, ``type(bar())`` would be a generator.

I don't want to tell you anything wrong because I don't know how 
generators are implemented on the C level but it's more like changing 
foo's (or frange's, in your example) return value.

HTH,
Stargaming


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Sep 24 12:42:27 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 24 Sep 2007 18:42:27 +0200
Subject: Can a base class know if a method has been overridden?
In-Reply-To: <1190648887.051630.168520@r29g2000hsg.googlegroups.com>
References: <1190647436.423328.217670@w3g2000hsg.googlegroups.com>
	<46f7d897$0$25150$426a74cc@news.free.fr>
	<1190648887.051630.168520@r29g2000hsg.googlegroups.com>
Message-ID: <46f7e8df$0$21052$426a74cc@news.free.fr>

Ratko a ?crit :
>> If your use case is to make sure a given ('abstract') method has been
>> overriden, the canonical solution is to raise NotImplementedError in the
>> base class's implementation
> 
> I am not really interested in forcing the subclass to implement a
> method. I am interested in knowing *whether* it did implement it or
> not.
> 
> 
>> Else, this may be possible using a custom metaclass (or possibly just
>> specializing the __new__ method), but there may be better solutions
>> (depending on what you're really trying to do)..
> 
> I have a base class EvtHandler that has methods defined to handle
> certain events. You then subclass from EvtHandler and override the
> methods for the events you want to receive. If a method has been
> overridden, the base class will automatically register for those
> events to make sure that they are even delivered to this handler
> (which is why I would need to know whether a method has been
> overridden or not). Of course, there are other ways of doing this
> which would require a bit more work from the subclass... I just
> thought this would be a neat "automatic" way of registering for
> events.
> 
> For example:
> 
> class EvtHandler:
>     def __init__(self):
>         if onKey is overridden:
>              register_for_key_events()
> 
>     def onKey(self):
>         pass
> 
> 
> class MyHandler(EvtHandler):
>     def onKey(self):
>         # do something here....
> 

Ok. The simplest solution, then, is simply to not implement the method 
in the base class, ie:

class EvtHandler:
     def __init__(self):
         if hasattr(self, 'onKey'):
              register_for_key_events()

      #def onKey(self):
      #    pass


class MyHandler(EvtHandler):
     def onKey(self):
         # do something here....


Another solution is to compare the functions wrapped by the methods:

class EvtHandler:
     def __init__(self):
         onKey = getattr(self, 'onKey')
         if onKey.im_func is EvtHandler.onKey.im_func:
              register_for_key_events()

      def onKey(self):
         pass


class MyHandler(EvtHandler):
     def onKey(self):
         # do something here....


HTH


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Sep 20 20:39:54 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 21 Sep 2007 02:39:54 +0200
Subject: executing list of methods (and collecting results)
References: <mailman.839.1190329275.2658.python-list@python.org>
Message-ID: <5lgi6qF81sotU1@mid.individual.net>

Gerardo Herzig wrote:

> I want the collect_validators() method is to execute any of the
> above methods, and collect their names as items of a list (wich
> will be the collect_validators() return value).

(inside class definition -- untested)
validators = {"is a number": is_really_a_number,
              "is even": is_even,
              "is greater than zero": is_greater_than_zero}

def collect_validators(self):
   return [desc for desc, func in self.validators.items() if func()]
 
> My first approach is:

... no method, but a generator. Executing it will give you a
generator object instead of a result list.
 
> [code]
> def collect_validators(self):
>     v_dict = { 'is_really_a_number': is_really_a_number,
>                       'is_even': is_even,
>                       'is_greater_than_zero', is_greater_than_zero
>                    }
> 
>        for name, meth in v_dict.items():
>           result = meth()
>           if result: yield name
> [/code]
> 
> I wondering if is this a good pattern to apply, i like the way it
> looks like, at least to me it looks `natural', 

IMHO, it doesn't look natural. It depends on what you want to
achieve. This generator will need to be iterated over until it
is "exhausted".

> but...im calling every method twice here?

No. Methods are only called if you apply the function call
operator, "()".

BTW, I hope you don't really want to test a number to be greater
than zero, or even, by using an own method, respectively, just to
test this.

Regards,


Bj?rn

-- 
BOFH excuse #321:

Scheduled global CPU outage



From Brian.McCann at viziant.net  Fri Sep  7 12:47:32 2007
From: Brian.McCann at viziant.net (Brian McCann)
Date: Fri, 7 Sep 2007 12:47:32 -0400
Subject: passing command line arguments
Message-ID: <93066C069973ED448DC2BCEA9C44A7383BE32D@efmailx>

 
Hi,
 
when I run the script show_args2.py

# ./show_args2.py 1 2 3

I get the following error

Traceback (most recent call last):
  File "./show_args2.py", line 4, in ?
    print 'The arguments of %s are "%s"' %s \
    NameError: name 's' is not defined


#####################################
<mailto:brian.mccann at viziant.net> 
this is the script
 #!/usr/bin/python
import sys, string
print 'The arguments of %s are "%s"' %s \
        (sys.argv[0], string.join(sys.argv[1:]))

 

any help would be greatly appreciated

-Brian


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From shriphanip at gmail.com  Tue Sep 25 04:15:55 2007
From: shriphanip at gmail.com (Shriphani)
Date: Tue, 25 Sep 2007 08:15:55 -0000
Subject: obtaining multiple values from a function.
Message-ID: <1190708155.683502.93040@r29g2000hsg.googlegroups.com>

hello all,

If I have a function that loops over a few elements and is expected to
throw out a few tuples as the output, then what should I be using in
place of return ?
Shriphani Palakodety.



From fperez.net at gmail.com  Sun Sep  9 17:26:36 2007
From: fperez.net at gmail.com (Fernando Perez)
Date: Sun, 09 Sep 2007 15:26:36 -0600
Subject: Any syntactic cleanup likely for Py3? And what about doc
	standards?
References: <46DEFD2E.5050205@sbcglobal.net>
	<mailman.112.1189022368.2658.python-list@python.org>
	<87tzq898e2.fsf@wilson.homeunix.com>
	<200709060119.28607.python@cx.hu>
Message-ID: <fc1oe4$a6r$1@sea.gmane.org>

Ferenczi Viktor wrote:


> Properties are very useful, since ordinary attribute access can be
> transparently replaced with properties if the developer needs to add code
> when it's set or needs to calculate it's value whenever it is read.
> 
> As an additional benefit this could allow developers to implement change
> events for properties that allows any number of observers to monitor
> property changes. This could be very useful in GUI programming, for
> example.

You might be interested in Traits:

http://code.enthought.com/traits/


Beautiful technology, precisely for the use cases you list, amongst many
others.

cheers,

f



From python at cx.hu  Tue Sep  4 17:16:08 2007
From: python at cx.hu (Ferenczi Viktor)
Date: Tue, 4 Sep 2007 23:16:08 +0200
Subject: doctest and decorators
In-Reply-To: <2bfa72fa0709041401g63e5f6aem55bcabe9e00134b@mail.gmail.com>
References: <2bfa72fa0709041329i14b5b547i2eb85250f7547da@mail.gmail.com>
	<200709042236.37712.python@cx.hu>
	<2bfa72fa0709041401g63e5f6aem55bcabe9e00134b@mail.gmail.com>
Message-ID: <200709042316.08263.python@cx.hu>

> @functools.wraps

Correctly:

@functools.wraps(f)

Pass the function to be wrapped by the decorator to the wraps function.

Regards, Viktor


From steve at holdenweb.com  Tue Sep  4 01:58:37 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 03 Sep 2007 22:58:37 -0700
Subject: parameter list notation
In-Reply-To: <1188882641.899594.212400@22g2000hsm.googlegroups.com>
References: <1188882028.165803.316540@r34g2000hsd.googlegroups.com>
	<1188882641.899594.212400@22g2000hsm.googlegroups.com>
Message-ID: <fbis6f$t5k$2@sea.gmane.org>

TheFlyingDutchman wrote:
> Well I did a search on "Python variable length arguments" and found a
> hit that seems to explain the *fields parameter:
> 
> When you declare an argment to start with '*', it takes the argument
> list into an array.
> 
> def foo(*args):
>   print "Number of arguments:", len(args)
>   print "Arguments are: ", args
> 
> 
Well done. The ** notation allows you to collect arbitrary keyword 
arguments into a dictionary (whose name is kw in the example you gave). 
With such a formal parameter any keyword argument is acceptable for a 
call (unless it duplicates a key value).

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From erik at myemma.com  Fri Sep 28 17:36:43 2007
From: erik at myemma.com (Erik Jones)
Date: Fri, 28 Sep 2007 16:36:43 -0500
Subject: Python 3.0 migration plans?
In-Reply-To: <1191009608.985644.271160@50g2000hsm.googlegroups.com>
References: <1191002679.569709.16870@22g2000hsm.googlegroups.com>
	<mailman.1242.1191003389.2658.python-list@python.org>
	<1191005906.556751.261940@22g2000hsm.googlegroups.com>
	<5m51l4Fbao07U2@mid.uni-berlin.de>
	<1191007754.740566.137510@n39g2000hsh.googlegroups.com>
	<1191008702.579795.141180@r29g2000hsg.googlegroups.com>
	<1191009608.985644.271160@50g2000hsm.googlegroups.com>
Message-ID: <4EB17941-E293-4B86-8B01-3DC79324BF1F@myemma.com>


On Sep 28, 2007, at 3:00 PM, TheFlyingDutchman wrote:

> On Sep 28, 12:45 pm, George Sakkis <george.sak... at gmail.com> wrote:
>> On Sep 28, 3:29 pm, TheFlyingDutchman <zzbba... at aol.com> wrote:
>>
>>> One issue I have with this group and that I encountered many  
>>> years ago
>>> in the Perl group is that there is no separate group
>>> comp.lang.python.beginner where you can ask questions without  
>>> getting
>>> hit with RTFM! and the like.
>>
>> Which shows once again that you're trying to break the world  
>> record of
>> being wrong in as many sentences as possible:
>>
>>    http://mail.python.org/mailman/listinfo/tutor
>>
>> You would do yourself (and others) a favor by migrating there for a
>> few weeks or months.
>>
>> George
>
> Being in a land where every nit can be picked, I am surprised that you
> offered up a mailing list when I was asking for a newsgroup.

I'm usually pretty quiet on this list.  That's what I find is the  
best way to participate.  However, I'm going to have to speak up and  
point out that that response is exactly the type of comment and/or  
reasoning that everyone here is trying to explain to you.  The  
resources are available for you to educate yourself.  Semantic  
arguments such as this are, at best, at a junior high level.  You are  
completely free to ask any question (about Python) you want here --  
just don't argue with the people giving you the answers.  And, to  
address the actual content of that response:  nobody, online or off,  
in newsgroups or on mailing lists, likes a nitpick.  So, please,  
quit.  I'd prefer you didn't leave and, instead, decided to actually,  
actively get along with the others here.  I think some of the  
question you've begun threads with have been both good and valid.   
It's just that you need some work on your e-people skills, man.

Erik Jones

Software Developer | Emma?
erik at myemma.com
800.595.4401 or 615.292.5888
615.292.0777 (fax)

Emma helps organizations everywhere communicate & market in style.
Visit us online at http://www.myemma.com




From michele.simionato at gmail.com  Thu Sep 20 01:30:09 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Thu, 20 Sep 2007 05:30:09 -0000
Subject: Mixin classes and single/multiple inheritance
In-Reply-To: <87myviuee5.fsf@benfinney.id.au>
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au>
	<46f0fba0$0$29605$426a34cc@news.free.fr>
	<1190199134.791808.267110@22g2000hsm.googlegroups.com>
	<mailman.778.1190225664.2658.python-list@python.org>
	<1190256493.827576.139470@r29g2000hsg.googlegroups.com>
	<877immvye0.fsf_-_@benfinney.id.au>
	<1190257864.945639.199230@k79g2000hse.googlegroups.com>
	<87y7f2uhpp.fsf@benfinney.id.au>
	<1190262607.684957.49610@57g2000hsv.googlegroups.com>
	<87myviuee5.fsf@benfinney.id.au>
Message-ID: <1190266209.617774.145250@n39g2000hsh.googlegroups.com>

On Sep 20, 6:52 am, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> Michele Simionato <michele.simion... at gmail.com> writes:
> > Since the language we have does have multiple inheritance, let's
> > use it to implement mixins.
> > ...
> > So, multiple inheritance is giving us very little for the point of
> > view of mixins; OTOH, multiple inheritance is giving us a lot of
> > headaches for what concerns cooperative methods.
>
> I may be obtuse, but the above statements seem to be professing
> contradictory viewpoints.
>
> Do you think multiple inheritance should or should not be used in
> Python to do what mixins do?

If you want to use mixins in Python, then you should use
multiple inheritance, since multiple inheritance is already
there, no point in reinventing it. OTOH, one may argue that
there are better approaches than mixins, but this is another
topic.

> > My point was that even if Python had been implemented without
> > multiple inheritance, it would have been simple to implement mixins,
> > or by copying the methods, or by dispatching with __getattr__.
>
> Can you give a code example of how you think mixins should be
> implemented in Python, assuming the absence of multiple inheritance?

I have various example somewhere in my hard disk, but now it is time
for me to go to job, so you will have to wait ;) But I
am sure others here can provide examples.

                     Michele Simionato



From cjw at sympatico.ca  Tue Sep 18 07:44:36 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Tue, 18 Sep 2007 07:44:36 -0400
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <740c3aec0709130730k2226e9abmbf5defb579b77660@mail.gmail.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>	<1189604018.520338.162520@57g2000hsv.googlegroups.com>
	<740c3aec0709130730k2226e9abmbf5defb579b77660@mail.gmail.com>
Message-ID: <fcodnp$7ln$1@sea.gmane.org>

BJ?rn Lindqvist wrote:
> On 9/12/07, Dave Hansen <iddw at hotmail.com> wrote:
>> The name "self" is just a convention.  You can give it any name you
>> wish.  Using "s" is common.
> 
> Not it's not common. And the name "self" is a convention codified in
> PEP8 which you shouldn't violate.
> 
> And I agree with the OP that the convention is really annoying.
> 
>   self.rect.width = self.foo(self.rect.x + self.rect.y) * self.boo()
> 
> is much less concise than
> 
>   s.rect.width = s.foo(s.rect.x + s.rect.y) * s.boo()
> 
Yes, but the OP went a step further, he suggested:

.rect.width = .foo(.rect.x + .rect.y) * .boo()

Among the many responses, I didn't spot anyone who dealt with this issue.

Does this preceding "." create parsing problems?

Colin W.



From truelixin at gmail.com  Thu Sep  6 01:44:20 2007
From: truelixin at gmail.com (truelixin at gmail.com)
Date: Wed, 05 Sep 2007 22:44:20 -0700
Subject: Using wild character
In-Reply-To: <1189054805.447871.213150@y42g2000hsy.googlegroups.com>
References: <1189054805.447871.213150@y42g2000hsy.googlegroups.com>
Message-ID: <1189057460.762343.187230@22g2000hsm.googlegroups.com>

i hope this may help you.

countries = ["india","africa","atlanta","artica","nigeria"]
filtered = filter(lambda item: item.startswith('a'), l)



From rami.mawas at gmail.com  Wed Sep 12 16:55:22 2007
From: rami.mawas at gmail.com (rami.mawas at gmail.com)
Date: Wed, 12 Sep 2007 20:55:22 -0000
Subject: Implementing a fixed size stack for an RPN Calculator
Message-ID: <1189630522.152326.3040@d55g2000hsg.googlegroups.com>


I have implemented an RPN calculator in python but now I would like to
make the stack size fixed. how can I transform the user's RPN
expression from a stack overflow to a computable expression.

For instance, if my stack size is 2 then the some expression can't be
computed but could be transformed as following:

Non computable expression: 1 2 3 + +   --> stack size of 3 is needed
Computable expression: 1 2 + 3 +         --> stack size of 2 is needed

How can I define a formal way of transforming the non computable
expression to computable one.

My RPN only implements: + - x %



From steve at holdenweb.com  Tue Sep 11 18:15:20 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 11 Sep 2007 18:15:20 -0400
Subject: Python.org mirror
In-Reply-To: <F79CF4D66F464242A8774755186E9EFE@laptopmark>
References: <F79CF4D66F464242A8774755186E9EFE@laptopmark>
Message-ID: <46E71378.40505@holdenweb.com>

Stream Service || Mark Scholten wrote:
> Dear sir, madam,
>  
> Stream Service would be happy to provide a free mirror for python.org. 
> We also host nl.php.net for free and we are happy to support more 
> opensource websites with free hosting.
>  
> Could you inform me about the options to become an officiel python.org 
> mirror?
>  
You may or may not be aware that the main Python site is hosted in the 
Netherlands.

Many thanks for your offer, but we have in any case discontinued the 
addition of new mirrors. See item 14 in

   http://www.python.org/psf/records/board/minutes/2007-03-12/

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From trekker182 at gmail.com  Mon Sep 17 17:15:29 2007
From: trekker182 at gmail.com (Shawn Minisall)
Date: Mon, 17 Sep 2007 17:15:29 -0400
Subject: qa
Message-ID: <46EEEE71.80108@gmail.com>

I'm trying to get a space in between these two strings but it's ignoring 
the space in between when it prints.

 >>> string.capwords (string.join([s1 + " " + s2])) * 3
'Spam Ni!Spam Ni!Spam Ni!'
 >>>


From roy at panix.com  Mon Sep  3 22:04:36 2007
From: roy at panix.com (Roy Smith)
Date: Mon, 03 Sep 2007 22:04:36 -0400
Subject: So what exactly is a complex number?
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
	<mailman.4.1188866709.21370.python-list@python.org>
Message-ID: <roy-3C221C.22043603092007@news.panix.com>

Boris Borcic <bborcic at gmail.com> wrote:
> Complex numbers are like a subclass of real numbers 

I wouldn't use the term "subclass".  It certainly doesn't apply in the same 
sense it applies in OOPLs.  For example, you can't say, "All complex 
numbers are real numbers".  In fact, just the opposite.

But, it's equally wrong to say, "real numbers are a subclass of complex 
numbers", at least not if you believe in LSP 
(http://en.wikipedia.org/wiki/Liskov_substitution_principle).  For example, 
it is true that you can take the square root of all complex numbers.  It is 
not, however, true that you can take square root of all real numbers.

Don't confuse "subset" with "subclass".  The set of real numbers *is* a 
subset of the set of complex numbers.  It is *not* true that either reals 
or complex numbers are a subclass of the other.


From mail at timgolden.me.uk  Fri Sep  7 03:47:19 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Fri, 07 Sep 2007 08:47:19 +0100
Subject: Finding specific date ranges
In-Reply-To: <1189122086.388859.146670@r34g2000hsd.googlegroups.com>
References: <1189090603.285778.282060@g4g2000hsf.googlegroups.com>
	<1189122086.388859.146670@r34g2000hsd.googlegroups.com>
Message-ID: <46E10207.3040900@timgolden.me.uk>

Zentrader wrote:
> On Sep 6, 7:56 am, kyoso... at gmail.com wrote:
>> December 31, 2006    January 13, 2007 # doesn't earn
>> January 14, 2007        January 27, 2007 # does earn
>> January 28, 2007        February 10, 2007 # doesn't
>> February 11, 2007       February 24, 2007 # does
> 
> Am I over simplifying if I say that since it appears to be a two week
> pay period, the date has to be greater than the 11th unless the first,
> or first and second, are on a weekend, in which case it would be > 12
> or > 13?  Or a reasonable facsimile thereof, depending on whether or
> not the two week period is Saturday through Friday.

I think it's one of those things where the neatest answer
could well depend on the sort of heuristic you mention. As
a rule, when I come across this kind of requirement, I tend
to put the most general solution in place, unless a *real*
optimisation is clearly called for. In my experience, this
makes it much easier for the next person who looks at the
code, typically years later, even if that's me!

(This is has just happened to me this week, having to review
a date-related calculation to do the repost frequency of the
adverts my company deals with. I wrote the original code five
years ago, and commented it intelligently, but I *still* had
to work through the code twice when we had a problem with a
particular cycle!)

TJG


From bj_666 at gmx.net  Sat Sep 22 12:32:28 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 22 Sep 2007 16:32:28 GMT
Subject: Would Anonymous Functions Help in Learning Programming/Python?
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<1190413322.962737.53900@r29g2000hsg.googlegroups.com>
	<1190414192.636397.146450@57g2000hsv.googlegroups.com>
	<1190443748.907702.154660@22g2000hsm.googlegroups.com>
	<7xlkazgpc5.fsf@ruckus.brouhaha.com>
	<1190447257.060479.141280@n39g2000hsh.googlegroups.com>
	<5lk2olF8gic1U5@mid.uni-berlin.de>
	<1190454275.282176.90830@k79g2000hse.googlegroups.com>
	<5lkbr8F8gic1U6@mid.uni-berlin.de>
	<1190469537.393019.133070@k79g2000hse.googlegroups.com>
Message-ID: <5lkucrF8gic1U8@mid.uni-berlin.de>

On Sat, 22 Sep 2007 06:58:57 -0700, Kay Schluehr wrote:

> On Sep 22, 1:15 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>> On Sat, 22 Sep 2007 02:44:35 -0700, Kay Schluehr wrote:
>> > I checked out Io once and I disliked it. I expected Io's prototype OO
>> > being just a more flexible variant of class based OO but Io couples a
>> > prototype very closely to its offspring. When A produces B and A.f is
>> > modified after production of B also B.f is modified.  A controls the
>> > state of B during the whole lifetime of B. I think parents shall not
>> > do this, not in real life and also not in programming language
>> > semantics.
>>
>> Well it's like Python: inherited slots (attributes) are looked up in the
>> ancestors.  It should be easy to override `Object clone` in Io, so all
>> slots of the ancestor are shallow copied to the clone, but I guess this
>> might break existing code.  At least for your own code you could introduce
>> a `realClone` slot.
> 
> But in class based OO most relevant attributes are defined during
> object construction and they can't be simply changed by setting a
> class attribute. Later you often create new attributes as but on
> object level. You do not overuse the object/class relationship to
> broadcast changes to all objects.

You don't do this in Io either.  It's really like Python in this respect.
There's an `init` slot that gets called by (the default) `clone` and you
set "instance attributes" there, for example mutables so they are not
shared by all clones.

Ciao,
	Marc 'BlackJack' Rintsch


From fabiofz at gmail.com  Sun Sep  9 16:49:14 2007
From: fabiofz at gmail.com (Fabio Zadrozny)
Date: Sun, 9 Sep 2007 17:49:14 -0300
Subject: Setting stdout encoding
Message-ID: <cfb578b20709091349q3c3ac1faq61d250e69d460506@mail.gmail.com>

Hi,

Does someone know if there's a way to explicitly set the stdout/stderr/stdin
encoding that python should use?

What I'm trying to do is make python recognize that the Eclipse output
accepts a different encoding (such as utf-8, cp1252, etc). More details on
the problem can be found at:
http://sourceforge.net/tracker/index.php?func=detail&aid=1580766&group_id=85796&atid=577329

The closest I could get to solving this was running a script that went on
and ran the script that should really be executed through the code below
(which I think is a lousy solution, but the only one I could see so far --
and I also have to keep different versions of that for jython, as in jython
that works without any workaround):

---------------------- script giving error ----------------------
print u"unicode char: >>\xF6<<"

---------------------- script I have to run to make it work
----------------------
if __name__ == '__main__':
    import sys
    reload(sys) #without the reload setdefaultencoding is not accessible
    sys.setdefaultencoding('cp1252')

    #go on and make an execfile on the module we actually want to run (we
have to be careful not to mess up that namespace)
    ....


Thanks,

Fabio
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From zzbbaadd at aol.com  Thu Sep 20 18:17:17 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Thu, 20 Sep 2007 15:17:17 -0700
Subject: about __str__
In-Reply-To: <mailman.835.1190325729.2658.python-list@python.org>
References: <mailman.835.1190325729.2658.python-list@python.org>
Message-ID: <1190326637.338109.139640@57g2000hsv.googlegroups.com>

I read here recently that the __str__ method of a list calls the
__repr__ method of each of its members. So you need to add a __repr__
method to your class:

class CmterIDCmts:
    def __init__(self,commiterID,commits):
        self.commiterID_=long(commiterID)
        self.commits_=long(commits)

    def __str__(self):
        s=""
        s+="<"+str(self.commiterID_)+":"+str(self.commits_)+">"
        return s
    def __repr__(self):
        return self.__str__()




From stef.mientki at gmail.com  Thu Sep 13 16:44:27 2007
From: stef.mientki at gmail.com (stef mientki)
Date: Thu, 13 Sep 2007 22:44:27 +0200
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <46e995d1$0$16120$9b4e6d93@newsspool1.arcor-online.net>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>	<1189604018.520338.162520@57g2000hsv.googlegroups.com>	<mailman.486.1189693844.2658.python-list@python.org>	<13eim00ha4lf356@corp.supernews.com>	<Xns99AA68B097778OKB@199.45.49.11>	<5ktfb5F5ctrvU1@mid.individual.net>	<46e98e01$0$30383$9b4e6d93@newsspool4.arcor-online.net>	<46e9921e$0$26251$426a74cc@news.free.fr>
	<46e995d1$0$16120$9b4e6d93@newsspool1.arcor-online.net>
Message-ID: <46E9A12B.20208@gmail.com>

Wildemar Wildenburger wrote:
> Bruno Desthuilliers wrote:
>   
>> OTHO, simple math-illeterate programmers like me will have hard time 
>> maintaining such a code.
>>     
> Certainly, but again: Such main people are not the intended audience. 
> The code is for people that know how to read these equations. I think a 
> general rule of (any form of) writing is to write with your audience in 
> mind. I always do that and happily, that audience is usually naked.
>
>
>   
Wouldn't Mathematica, Maple or MathCad be a far better choice ?

cheers,
Stef Mientki



From pramodmc4u at gmail.com  Sun Sep 30 13:53:37 2007
From: pramodmc4u at gmail.com (pramodmc4u at gmail.com)
Date: Sun, 30 Sep 2007 17:53:37 -0000
Subject: code for number guessing by computer
Message-ID: <1191174817.788812.40360@y42g2000hsy.googlegroups.com>

hi, please help me,,,,,, a newbie.......send me code for a programme
in which the computer tell u the number that u guessed............



From paddy3118 at googlemail.com  Sat Sep 15 02:36:32 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Sat, 15 Sep 2007 06:36:32 -0000
Subject: regexp search on infinite string?
In-Reply-To: <fcfdq4$23d$1@daisy.noc.ucla.edu>
References: <1189802940.518794.129130@r29g2000hsg.googlegroups.com>
	<fcfdq4$23d$1@daisy.noc.ucla.edu>
Message-ID: <1189838192.090251.292620@g4g2000hsf.googlegroups.com>

On Sep 15, 2:57 am, James Stroud <jstr... at mbi.ucla.edu> wrote:
> Paddy wrote:
> > Lets say i have a generator running that generates successive
> > characters of a 'string'
> >>From what I know, if I want to do a regexp search for a pattern of
> > characters then I would have to 'freeze' the generator  and pass the
> > characters so far to re.search.
> > It is expensive to create successive characters, but caching could be
> > used for past characters. is it possible to wrap the generator in a
> > class, possibly inheriting from string, that would allow the regexp
> > searching of the string but without terminating the generator? In
> > other words duck typing for the usual string object needed by
> > re.search?
>
> > - Paddy.
>
> re.search & re.compile checks for str or unicode types explicitly, so
> you need to turn your data into one of those before using the module.
>
> buffer = []
> while True:
>    buffer.append(mygerator.next())
>    m = re.search(pattern, "".join(buffer))
>    if m:
>      process(m)
>      buffer = []
>
> James

Thanks James.



From gagsl-py2 at yahoo.com.ar  Sun Sep 30 07:21:41 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 30 Sep 2007 08:21:41 -0300
Subject: which language allows you to change an argument's value?
References: <1191149233.346818.246170__37520.6361794428$1191149499$gmane$org@22g2000hsm.googlegroups.com>
Message-ID: <op.tzgsifbxx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 30 Sep 2007 07:47:13 -0300, Summercool <Summercoolness at gmail.com>  
escribi?:

> I wonder which language allows you to change an argument's value?
> like:
>
> foo(&a) {
>   a = 3
> }
>
> n = 1
> print n
>
> foo(n)     # passing in n, not &n
> print n
>
> and now n will be 3.  I think C++ and PHP can let you do that, using
> their reference (alias) mechanism.  And C, Python, and Ruby probably
> won't let you do that.  What about Java and Perl?
>
> is there any way to prevent a function from changing the argument's
> value?
>
> isn't "what i pass in, the function can modify it" not a desireable
> behavior if i am NOT passing in the address of my argument?  For one

C++ lets you use const references - and any well written code should use  
const& whenever the argument is not to be modified. A function/method may  
have two overloaded versions, with and without the const modifier.
So, if the argument *is* to be modified, there is no point in avoiding it  
(unless the interfase is not well designed in the first place)

In Python, rebinding a name inside a function does not have any effects in  
the caller. That is,

def foo(a):
   a = 3

n = 1
foo(n)
print n

will still print 1, not 3.

-- 
Gabriel Genellina



From lasses_weil at klapptsowieso.net  Mon Sep  3 07:34:36 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Mon, 03 Sep 2007 13:34:36 +0200
Subject: TypeError: 'module object is not callable'
In-Reply-To: <1188816626.021956.281040@22g2000hsm.googlegroups.com>
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<mailman.315.1188810174.28954.python-list@python.org>
	<46dbd11e$0$6228$426a74cc@news.free.fr>
	<mailman.317.1188812089.28954.python-list@python.org>
	<1188816626.021956.281040@22g2000hsm.googlegroups.com>
Message-ID: <46dbf14d$0$4530$9b4e6d93@newsspool3.arcor-online.net>

christophertidy at hotmail.com wrote:
> Thank you for your help that seems to have done the trick.
> You are correct Diez B. Roggisch that I come from a java background!
> 
> I have a new tiny problem I can't understand either.
> Withing Step.py I have the following method
> 
> def isCompleted(self):
>     "Check whether data step has been processed"
>     return self.isCompleted
> 
Java, ey? ;)

Why do you write a method that jut returns a variable anyway? Forget 
that. Python doesn't need getters and setters.



> Then within main.py I simply wish to print the value of isCompleted
> which I try to do by the following
> print 'Magn completed status is',a.isCompleted()
> 
> Which returns the following error:
>     a.isCompleted()
> TypeError: 'int' object is not callable
> 
That is (I think) because you have two things called "isCompleted" in 
your class: The variable of type int (which BTW had better been of type 
bool) and the method.
As I said, just scrap the method. In Python it's perfectly OK to expose 
variables in the API. If you still want getters and setters, use look 
into properties.

/W


From dotancohen at gmail.com  Sun Sep 16 12:06:08 2007
From: dotancohen at gmail.com (Dotan Cohen)
Date: Sun, 16 Sep 2007 18:06:08 +0200
Subject: Cannot formulate regex
In-Reply-To: <1189957099.952690.275320@n39g2000hsh.googlegroups.com>
References: <mailman.610.1189955906.2658.python-list@python.org>
	<1189957099.952690.275320@n39g2000hsh.googlegroups.com>
Message-ID: <880dece00709160906y68a28321nb3512ad422027797@mail.gmail.com>

On 16/09/2007, Paul McGuire <ptmcg at austin.rr.com> wrote:
> On Sep 16, 10:18 am, "Dotan Cohen" <dotanco... at gmail.com> wrote:
> > I'd like to filter spam from a certain company. Here are examples of
> > strings found in their spam:
> > Mega Dik
> > Mega D1k
> > MegaDik
> > Mega. Dik
> > M eg ad ik
> > M E _G_A_D_ IK
> > M_E_G. ADI. K
> >
> > I figured that this regex would match all but the second example, yet
> > it matches none:
> > |[^a-z]m[^a-z]e[^a-z]g[^a-z]a[^a-z]d[^a-z]i[^a-z]k[^a-z]|i
> >
> > What would be the regex that matches "megadik" regardless of whatever
> > characters are sprinkled throughout?
> >
> > Thanks in advance.
> >
> > Dotan
>
> Or you could try using "MegaRegex"!  I do and my girlfriend can't stop
> talking about it! :)
>

Hehe, thanks Paul. I should have though of the * myself... Got the job done.

Dotan Cohen

http://what-is-what.com
http://gibberish.co.il

--

?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?

A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?

From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Sep 12 08:00:41 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 12 Sep 2007 14:00:41 +0200
Subject: cpython list __str__ method for floats
References: <13ectngf3aeqrb0@corp.supernews.com>
	<5kndseF4iskqU1@mid.individual.net>
	<13eehfo8nr5eu1d@corp.supernews.com>
Message-ID: <5kq2n9F4uhr0U1@mid.individual.net>

[david] wrote:

> Leaving aside the question of why str should return repr,

str doesn't "return" repr. str returns a "nice string
representation" of an object. This "nice string representation" of
a list is the opening square bracket, the repr of its contents
seperated by comma, and the closing square bracket.
<prayer-mill>Here, it *only* makes sense to have a list printed
with the repr of their contents.</prayer-mill>

> 13.300000000000001 is not 'the float in full precision':
> it is an arbitrary translation of the float.

Do you know IEEE 754?
 
> The idea that 13.3 is a 'rounded' value for the number,
> and that 13.300000000000001 is not a 'rounded' value of
> the number, is a common error of intuitive mathematics.

I'm intrigued how /you/'d explain this, please do explain.

> I hope that when you say that this is a FAQ, you don't
> mean that the community has solidified on this naive
> interpretation :~)

No, I mean that your complaint is not at all new. Reading the
archives you could have learned a lot about this topic.

Regards,


Bj?rn

-- 
BOFH excuse #247:

Due to Federal Budget problems we have been forced to cut back on
the number of users able to access the system at one time. (namely
none allowed....)



From steve at holdenweb.com  Fri Sep 21 15:21:58 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 21 Sep 2007 15:21:58 -0400
Subject: xml-rpc timeout
In-Reply-To: <QYKdnX_tXu5Vj2nbnZ2dnUVZ_qWdnZ2d@comcast.com>
References: <2_WdnTQ86eZNY27bnZ2dnUVZ_jCdnZ2d@comcast.com>	<mailman.877.1190396335.2658.python-list@python.org>
	<QYKdnX_tXu5Vj2nbnZ2dnUVZ_qWdnZ2d@comcast.com>
Message-ID: <fd15kn$tke$1@sea.gmane.org>

Jd wrote:
> Steve Holden wrote:
>> Jd wrote:
>>> Hi
>>>    I have a multi-threaded application. For certain operations to the
>>> server, I would like to explicitly set timeout so that I get correct
>>> status from the call and not timed out exception.
>>>    Does anyone know how to go about doing it ?
>>>
>> The easiest way is to use socket.setdefaulttimeout() to establish a
>> longer timeout period for all sockets, I guess. It's difficult to
>> establish different timeouts for individual sockets when they aren't
>> opened directly by your own code (though each socket does also have a
>> method to set its timeout period).
>>
>> regards
>>  Steve
> 
> Ya.. the problem here is that I donot have acces to the socket. I have
> written my own transport etc.. but when the socket is getting created,
> there is no context for the method and where I know what method I am
> going to call, I do not have access to socket.
> 
But you are writing Python, so you can write

import socket
socket.setdefaulttimeout(60)

and this will apply to all sockets that on't have their own explicit 
timeouts applied. Give it a try.

> I would have thought this to be an easy thing to achieve. In order to
> make xml-rpc easy to use.. it has become difficult to control.
> 
You might also ask why your server *is* timing out. Timeouts shouldn't 
be a normal feature of TCP communications. Is there a reason of rthis 
anomalous behavior, or are you perhaps trying to solve the wrong problem?

> Anyone have any other ideas ?
> 
That's all from me!

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From michael at stroeder.com  Wed Sep  5 03:05:01 2007
From: michael at stroeder.com (=?ISO-8859-1?Q?Michael_Str=F6der?=)
Date: Wed, 05 Sep 2007 09:05:01 +0200
Subject: FCGI app reloading on every request
In-Reply-To: <MGeDi.23889$eY.15563@newssvr13.news.prodigy.net>
References: <46DCDE59.8060109@animats.com> <46DCE052.40708@v.loewis.de>
	<HG5Di.1553$Sd4.772@nlpi061.nbdc.sbc.com>
	<s7ovq4-3eb.ln1@nb2.stroeder.com>
	<MGeDi.23889$eY.15563@newssvr13.news.prodigy.net>
Message-ID: <t112r4-054.ln1@nb2.stroeder.com>

John Nagle wrote:
>    This is running on a dedicated server at APlus.net,
> running Red Hat Fedora Core 6, Python 2.5, and managed with Plesk 8.2.
> I just turned on fcgid from the Plesk control panel ("Physical hosting
> setup page for domain", checked "FastCGI"), and enabled the standard
> FCGI configuration, which is actually mod_fcgid.
> [..]
>   What's wierd is that the ".fcgi" suffix files get executed at all.
> I'd expect them to be either ignored or run properly with FCGI.

Then I would ask APlus.net what's really going on there.

Ciao, Michael.


From paddy3118 at googlemail.com  Sat Sep 22 10:50:12 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Sat, 22 Sep 2007 14:50:12 -0000
Subject: Getting rid of bitwise operators in Python 3?
In-Reply-To: <46f49740$0$32514$4c368faf@roadrunner.com>
References: <46f49740$0$32514$4c368faf@roadrunner.com>
Message-ID: <1190472612.942736.325850@w3g2000hsg.googlegroups.com>

Sorry Carl,
I think *you* may not have much need for bitwise operators but others,
including myself do. No matter what the usage found, I would think
replacing bitwise operators by function calls a retrograde step.

- Paddy.



From rbonvall at gmail.com  Fri Sep  7 13:55:57 2007
From: rbonvall at gmail.com (Roberto Bonvallet)
Date: Fri, 07 Sep 2007 17:55:57 -0000
Subject: Speed of Python
In-Reply-To: <mailman.236.1189186629.2658.python-list@python.org>
References: <1189185542.798286.168880@50g2000hsm.googlegroups.com>
	<mailman.236.1189186629.2658.python-list@python.org>
Message-ID: <1189187757.418355.58690@r34g2000hsd.googlegroups.com>

On Sep 7, 1:37 pm, "wang frank" <f... at hotmail.co.jp> wrote:
> Hi,
> Here is the matlab code:
> function [z]=bench1(n)
> for i=1:n,
>     for j=1:1000,
>         z=log(j);
>         z1=log(j+1);
>         z2=log(j+2);
>         z3=log(j+3);
>         z4=log(j+4);
>         z5=log(j+5);
>         z6=log(j+6);
>         z7=log(j+7);
>         z8=log(j+8);
>         z9=log(j+9);
>     end
> end
> z = z9;
>
> I am not familiar with python, so I just simply try to reproduce the same
> code in python.
> If you think that my python script is not efficient, could you tell me how
> to make it more efficient?

> > > import math
> > > def bench1(n):
> > >         for i in range(n):
> > >                 for j in range(1000):

The range(1000) call creates a list of 1000 elements each time it is
called.
This is expensive.  You could try something like the following:

def bench1a(n):
    r = range(1000)
    for i in range(n):
        # reuse the list
        for j in r:
            ...

def bench1b(n):
    for i in range(n):
        # don't use a list at all
        j = 0
        while j < 1000:
            ...

I'm no expert on Python optimization either, so I cannot guarantee
that both are
the best way to write this algorithm.

> > > [...]
> > >                         m=j+1

This step also doesn't occur in the Matlab code.

Hope this helps, although maybe I'm not the right person to talk about
optimization, and I haven't measured my code.

--
Roberto Bonvallet




From laurent.pointal at limsi.fr  Mon Sep 17 04:44:12 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Mon, 17 Sep 2007 10:44:12 +0200
Subject: Python "with"
In-Reply-To: <fck2di$7to$1@ss408.t-com.hr>
References: <fck2di$7to$1@ss408.t-com.hr>
Message-ID: <fcleos$2rt$1@news2.u-psud.fr>

Ivan Voras a ?crit :
<zip>
> I know it can be almost always done by using a temporary variable:
> 
> tmp = some.big.structure.or.nested.objects.element
> tmp.member1 = something
> tmp.member2 = something
> 
> but this looks ugly to me.)

The ugly part is the 'tmp' name, try to choose a name with a proper 
meaning about what it is really, and it become clean and readable:

filerefs = some.big.structure.or.nested.object.with.file.references
filerefs.encoding = "utf-8"
filerefs.name = "MyFileName.txt"
filerefs.use_quotes = True

Isn't it ?



From gagsl-py2 at yahoo.com.ar  Mon Sep 24 22:08:12 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 24 Sep 2007 23:08:12 -0300
Subject: Regular Expressions: Can't quite figure this problem out
References: <496954360709241737o6e42e7efk29886b5631f6ca2e@mail.gmail.com>
	<a49e45f50709241827i107d0acav28431853ef403702@mail.gmail.com>
	<496954360709241853w6bb6e813ved0ec4fc80304d51@mail.gmail.com>
Message-ID: <op.ty6tjyfqx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 24 Sep 2007 22:53:57 -0300, Robert Dailey <rcdailey at gmail.com>  
escribi?:

> Any easier way to do a 'replace' then using start(), end(), and slicing
> operations? I'm currently doing it manually.

Yes: forget about regular expressions. ElementTree does that for free:

source = """
<xml>
<root></root>
<root/>
<root><frame type="image"><action></action></frame></root>
<root><frame type="image"><action/></frame></root>
</xml>
"""

import xml.etree.ElementTree as ET
tree = ET.XML(source)
print ET.tostring(tree)

output:

<xml>
<root />
<root />
<root><frame type="image"><action /></frame></root>
<root><frame type="image"><action /></frame></root>
</xml>

-- 
Gabriel Genellina



From mhellwig at xs4all.nl  Tue Sep  4 22:13:15 2007
From: mhellwig at xs4all.nl (Martin P. Hellwig)
Date: Wed, 05 Sep 2007 04:13:15 +0200
Subject: Parse or Pass?
In-Reply-To: <46DD916E.4000201@v.loewis.de>
References: <1188917032.271543.236420@d55g2000hsg.googlegroups.com>
	<mailman.28.1188917501.2658.python-list@python.org>
	<46DD916E.4000201@v.loewis.de>
Message-ID: <46de108a$0$29358$e4fe514c@dreader19.news.xs4all.nl>

Martin v. L?wis wrote:
<cut>
> If I extrapolate my experience with German IT language, I
> think people often use terminology they have not fully
> understood. I often ask my students what the difference
> between "eingeben", "ausgeben", "?bergeben" und
> "zur?ckgeben" is when they start saying that "die
> Funktion gibt das Ergebnis aus".
> 
> Regards,
> Martin

Interesting, I lived my early childhood in Germany and somehow, now I 
see it all written in once, I have the feeling I get more confused. So 
would you agree with my interpretation?

Eingeben = <Giving in> Input: (A bit of) data from outside the function
Ausgeben = <Giving out> Output: (A bit of) data to display, network 
connection or file
Zur?ckgeben = <Giving back> Return: (altered)(bits of) data (from Input) 
to Output

Can I assume that Return in general always means that the particular 
function has exited with that? If not what is the difference then 
between Output and Return?

Another thing is that with the above statement the opposite could be 
true too, meaning  that Input in the German meaning would only been done 
when the function is initiated but how do you call the other input then? 
The appropriate German word would be "Zugeben", which translates to 
Enter (Giving too).

And then we have "?bergeben" which translates to throughput (giving 
over), which in my view is just something that gets data in and puts it 
out, contextually unaltered.  But would that do that with exiting the 
function or not? If it's not both what's the other one called? 
"?bernemen" perhaps (Taking over)?

Hmm feels like textbook classics, only if I knew which book, probably 
programming 101 :-)

-- 
mph


From bdesth.quelquechose at free.quelquepart.fr  Thu Sep 27 14:49:40 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 27 Sep 2007 20:49:40 +0200
Subject: An Editor that Skips to the End of a Def
In-Reply-To: <slrnffkodo.218.horpner@FIAD06.norwich.edu>
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk> <fd0au1$fro$1@lust.ihug.co.nz>
	<5lhs4pF8bkunU1@mid.individual.net> <fd4168$ige$1@lust.ihug.co.nz>
	<slrnfff9op.1is.horpner@FIAD06.norwich.edu>
	<fd9ncb$q3l$1@lust.ihug.co.nz>
	<slrnffhe9g.2db.hat@se-162.se.wtb.tue.nl>
	<fdcfci$brq$1@lust.ihug.co.nz>
	<mailman.1078.1190777151.2658.python-list@python.org>
	<slrnffkodo.218.horpner@FIAD06.norwich.edu>
Message-ID: <46fbfb6f$0$8896$426a74cc@news.free.fr>

Neil Cerutti a ?crit :
(snip)
> 
> Vim has Python integration if you want to control it with Python
> scripts. Cool! Of course, Vim needs such a capability more than
> Emacs, which has the very cool elisp scripting language.

FWIW, emacs is programmable in Python too IIRC.


From laurent.pointal at limsi.fr  Mon Sep 17 09:39:50 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Mon, 17 Sep 2007 15:39:50 +0200
Subject: Saving parameters between Python applications?
In-Reply-To: <1189969538.830532.98840@g4g2000hsf.googlegroups.com>
References: <1189969538.830532.98840@g4g2000hsf.googlegroups.com>
Message-ID: <fcm036$cp8$1@news2.u-psud.fr>

Stodge a ?crit :
> I'm trying to do the following. I have a Python application that is
> run:
> 
> python app1.py --location=c:\test1
> 
> What I want to do is save the location parameter, so I can then do (in
> the same window):
> 
> python app2.py
> 
> And have app2.py automatically have access to the value of "location".
> 
> Now, the difficult part is, that in another window I want to do:
> 
> python app1.py --location=c:\test2
> python app2.py
> 
> And have app2.py automatically get c:\test2 as the location. So the
> two windows (consoles) are isolated from each other.
> 
> I thought I could use os.environ, but that doesn't save the variable
> for applications that are run afterwards in the same window.
> 
> Any suggestions?

May use simple file in known place:
$HOME/.myprefs
$HOME/.conf/myprefs

Or host specific configuration API:
WindowsRegistry HKEY_CURRENT_USER\Software\MySociety\MyApp\myprefs


See os.getenv, and _winreg Windows specific module.
See also standard ConfigParser module
Hope you know how to read/write files.



From db3l.net at gmail.com  Sat Sep  1 18:58:47 2007
From: db3l.net at gmail.com (David Bolen)
Date: Sat, 01 Sep 2007 18:58:47 -0400
Subject: Co-developers wanted: document markup language
References: <87odgyyx9u.fsf@wilson.homeunix.com>
	<fakrtb$2ts$1@panix3.panix.com>
	<87tzqpew22.fsf@wilson.homeunix.com>
	<fal3cv$bi2$1@panix3.panix.com>
	<87tzqp77my.fsf@wilson.homeunix.com>
	<7xy7g1if24.fsf@ruckus.brouhaha.com> <fbbi1h$cdd$2@lust.ihug.co.nz>
	<roy-5D1B70.09244001092007@news.panix.com>
Message-ID: <m2zm06c7rs.fsf@valheru.db3l.homeip.net>

Roy Smith <roy at panix.com> writes:

> Anybody remember Scribe?

(raising hand)

OT, but I still have a bunch of Scribe source documents from college.

Of course, as I attended CMU where it originated I suppose that's not
unusual.  Definitely pre-WYSIWYG, but one of the first to separate
presentation markup from structure (very much in line with later stuff
like SGML from IBM although I don't recall the precise timing relation
of the two), including the use of styles.

I personally liked it a lot (I think the markup syntax is easier on
the eyes than the *ML family).  If I remember correctly, for a while
there, it was reasonably common to see Scribe-like markup in
newsgroups (e.g,. "@begin(flame)" and @end("flame") or "@b[emphasis]")
before SGML/XML/HTML became much more common ("<flame> ... </flame>").

-- David


From steve at holdenweb.com  Tue Sep 11 23:16:30 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 11 Sep 2007 23:16:30 -0400
Subject: Get the complete command line as-is
In-Reply-To: <1189566000.793354.308420@19g2000hsx.googlegroups.com>
References: <1189566000.793354.308420@19g2000hsx.googlegroups.com>
Message-ID: <fc7lmc$q0o$2@sea.gmane.org>

wangzq wrote:
> Hello,
> 
> I'm passing command line parameters to my browser, I need to pass the
> complete command line as-is, for example:
> 
> test.py "abc def" xyz
> 
> If I use ' '.join(sys.argv[1:]), then the double quotes around "abc
> def" is gone, but I need to pass the complete command line ("abc def"
> xyz) to the browser, how can I do this?
> 
> I'm on Windows.
> 
> Thanks.
> 
You can't. The quotes are gobbled  by the command-line processor before 
your program ever gets the chance to see them. You could try writing 
your own command shell ... or learn how to quote the quotes.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From steve at REMOVE-THIS-cybersource.com.au  Sat Sep 22 22:53:34 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sun, 23 Sep 2007 02:53:34 -0000
Subject: Factory function with keyword arguments
Message-ID: <13fbl9ertj5es12@corp.supernews.com>

I'm writing a factory function that needs to use keywords in the produced 
function, not the factory. Here's a toy example:

def factory(flag):
    def foo(obj, arg):
        if flag:
            # use the spam keyword to method()
            return obj.method(spam=arg)
        else:
            # use the ham keyword
            return obj.method(ham=arg)
    return foo

Problem: the test of which keyword to use is done every time the produced 
function is called, instead of once, in the factory.

I thought of doing this:

def factory(flag):
    if flag: kw = 'spam'
    else: kw = 'ham'
    def foo(obj, arg):
        kwargs = dict([(kw, arg)])
        return obj.method(**kwargs)
    return foo

Is this the best way of doing this? Are there any alternative methods 
that aren't risky, slow or obfuscated?

Before anyone suggests changing the flag argument to the factory to the 
name of the keyword, this is only a toy example, and doing so in my 
actual code isn't practical. 



-- 
Steven.


From daniel.j.larsson at gmail.com  Wed Sep  5 06:20:44 2007
From: daniel.j.larsson at gmail.com (Daniel Larsson)
Date: Wed, 5 Sep 2007 12:20:44 +0200
Subject: doctest and decorators
In-Reply-To: <1188970537.297655.256600@r34g2000hsd.googlegroups.com>
References: <2bfa72fa0709041329i14b5b547i2eb85250f7547da@mail.gmail.com>
	<200709042316.08263.python@cx.hu>
	<2bfa72fa0709041452o72d9a98fp939852d061a2cda3@mail.gmail.com>
	<200709050009.46380.python@cx.hu>
	<2bfa72fa0709041529g9d5ac22hce3a55d5357b1a1c@mail.gmail.com>
	<mailman.56.1188949595.2658.python-list@python.org>
	<1188970537.297655.256600@r34g2000hsd.googlegroups.com>
Message-ID: <2bfa72fa0709050320o65dc2d62u854799833bce665e@mail.gmail.com>

The __module__ attribute is set, but the problem is the test in
doctest.py(DocTestFinder._from_module)

        ...
        elif inspect.isfunction(object):
            return module.__dict__ is object.func_globals
        elif inspect.isclass(object):
            return module.__name__ == object.__module__
        elif inspect.getmodule(object) is not None:
            return module is inspect.getmodule(object)

On 9/5/07, Michele Simionato <michele.simionato at gmail.com> wrote:
>
> > En Tue, 04 Sep 2007 19:29:11 -0300, Daniel Larsson
> > <daniel.j.lars... at gmail.com> escribi?:
> >
> >
> >
> > > On 9/5/07, Ferenczi Viktor <pyt... at cx.hu> wrote:
> >
> > >> > > @functools.wraps(f)
> > >> > > Pass the function to be wrapped by the decorator to the wraps
> > >> function.
> > >> > Ooops, right. That doesn't change the fact that decorated functions
> > >> get
> > >> > hidden from doctest though.
> >
> > > I have no issue when the decorator is defined in the same module as
> the
> > > decorated function, my problem is running doctests on functions using
> an
> > > imported decorator. Having to implement the decorator in every source
> > > module
> > > isn't very practical.
>
> I cannot reproduce your problem. Using functools.wraps
> the __module__ attribute is set correctly and everything
> works, even for decorators defined in separated modules.
> Care to post a complete example of what you are doing?


inspect.isfunction(object) returns true, but the function's func_globals
isn't the same as the module's __dict__, since the function is actually my
decorator wrapper function.

Here's my two files again:

# decorator.py
import functools

def simplelog(f):
    @functools.wraps(f)
    def new_f(*args, **kwds):
        print "Wrapper calling func"
        return f(*args, **kwds)
    return new_f

# test.py
from decorator import simplelog

@simplelog
def test():
    """
    This test should fail, since the decorator prints output. Seems I don't
get called though
    >>> test()
    'works!'
    """
    return "works!"

if __name__ == '__main__':
    import doctest
    doctest.testmod()



         Michele Simionato
>
> P.S. for some reason your messages are not appearing on
> Google groups, I see only the replies.
>
>
Weird... afraid I have no clue why not :)
-------------- next part --------------
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From hniksic at xemacs.org  Wed Sep  5 08:15:27 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Wed, 05 Sep 2007 14:15:27 +0200
Subject: creating really big lists
References: <1188985838.661821.41530@k79g2000hse.googlegroups.com>
Message-ID: <874pi92tr4.fsf@mulj.homelinux.net>

Dr Mephesto <dnhkng at googlemail.com> writes:

> I would like to create a pretty big list of lists; a list 3,000,000
> long, each entry containing 5 empty lists. My application will
> append data each of the 5 sublists, so they will be of varying
> lengths (so no arrays!).
>
> Does anyone know the most efficient way to do this? I have tried:
>
> list = [[[],[],[],[],[]] for _ in xrange(3000000)]

You might want to use a tuple as the container for the lower-level
lists -- it's more compact and costs less allocation-wise.

But the real problem is not list allocation vs tuple allocation, nor
is it looping in Python; surprisingly, it's the GC.  Notice this:

$ python
Python 2.5.1 (r251:54863, May  2 2007, 16:56:35)
[GCC 4.1.2 (Ubuntu 4.1.2-0ubuntu4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import time
>>> t0=time.time(); l=[([],[],[],[],[]) for _ in xrange(3000000)];
>>> t1=time.time()
>>> t1-t0
143.89971613883972

Now, with the GC disabled:
$ python
Python 2.5.1 (r251:54863, May  2 2007, 16:56:35)
[GCC 4.1.2 (Ubuntu 4.1.2-0ubuntu4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import gc
>>> gc.disable()
>>> import time
>>> t0=time.time(); l=[([],[],[],[],[]) for _ in xrange(3000000)];
>>> t1=time.time()
>>> t1-t0
2.9048631191253662

The speed difference is staggering, almost 50-fold.  I suspect GC
degrades the (amortized) linear-time list building into quadratic
time.  Since you allocate all the small lists, the GC gets invoked
every 700 or so allocations, and has to visit more and more objects in
each pass.  I'm not sure if this can be fixed (shouldn't the
generational GC only have to visit the freshly created objects rather
than all of them?), but it has been noticed on this group before.

If you're building large data structures and don't need to reclaim
cyclical references, I suggest turning GC off, at least during
construction.


From Michael.Coll-Barth at VerizonWireless.com  Sat Sep 29 16:23:01 2007
From: Michael.Coll-Barth at VerizonWireless.com (Michael.Coll-Barth at VerizonWireless.com)
Date: Sat, 29 Sep 2007 16:23:01 -0400
Subject: Program inefficiency?
In-Reply-To: <NYOBGCEXSMTP21RmaPp001506d7@nyobgcexsmtp21.uswin.ad.vzwcorp.com>
References: <NYOBGCEXSMTP22SiTqg00150043@NYOBGCEXSMTP22.uswin.ad.vzwcorp.com><mailman.1282.1191082697.2658.python-list@python.org><1191094332.393736.231390@w3g2000hsg.googlegroups.com>
	<NYOBGCEXSMTP21RmaPp001506d7@nyobgcexsmtp21.uswin.ad.vzwcorp.com>
Message-ID: <20070929202305.8A2301E4005@bag.python.org>

 

> -----Original Message-----
> From: thebjorn
> 
> On Sep 29, 9:32 pm, stdazi <std... at gmail.com> wrote:
> > On Sep 29, 6:07 pm, Michael.Coll-Ba... at VerizonWireless.com wrote:
> >
> > > You did not mention the OS, but because you are using
> > > "pathname\editfile.txt", it sounds like you are using an 
> MS OS.  From
> > > past experience with various MS OSes, I found that as the 
> number of
> > > files in a directory increases the slower your process 
> runs for each
> > > file.
> >
> > how so?
> 
> Not entirely sure why, but some of the ms docs allude to the fact that
> there is a linked list involved (at least for fat-style disks).
> 

Wow!  Talk about defending one's self ( me ).  I took stdazi's question
to mean why I thought it was an MS OS issue.  And, yes, you are correct
about the linked-list.  Although, I do not know if that was the reason
for the my problem.


The information contained in this message and any attachment may be
proprietary, confidential, and privileged or subject to the work
product doctrine and thus protected from disclosure.  If the reader
of this message is not the intended recipient, or an employee or
agent responsible for delivering this message to the intended
recipient, you are hereby notified that any dissemination,
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If you have received this communication in error, please notify me
immediately by replying to this message and deleting it and all
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From kostaspaxos at yahoo.gr  Sat Sep 15 12:34:45 2007
From: kostaspaxos at yahoo.gr (Konstantinos Pachopoulos)
Date: Sat, 15 Sep 2007 19:34:45 +0300
Subject: find and remove "\" character from string
Message-ID: <46EC09A5.7050609@yahoo.gr>

Hi,
i have the following string s and the following code, which doesn't 
successfully remove the "\", but sucessfully removes the "\\".

 >>> s="Sad\\asd\asd"
 >>> newS=""
 >>> for i in s:
...     if i!="\\":
...             newS=newS+i
...
 >>> newS
'Sadasd\x07sd'

I have also read the following, but i do not understand the "...and the 
remaining characters have been mapped through the given translation 
table, which must be a string of length 256". Can some explain?

*translate*( 	table[, deletechars])

    Return a copy of the string where all characters occurring in the
    optional argument deletechars are removed, and the remaining
    characters have been mapped through the given translation table,
    which must be a string of length 256.

    For Unicode objects, the translate() method does not accept the
    optional deletechars argument. Instead, it returns a copy of the s
    where all characters have been mapped through the given translation
    table which must be a mapping of Unicode ordinals to Unicode
    ordinals, Unicode strings or |None|. Unmapped characters are left
    untouched. Characters mapped to |None| are deleted. Note, a more
    flexible approach is to create a custom character mapping codec
    using the codecs <http://docs.python.org/lib/module-codecs.html>
    module (see encodings.cp1251 for an example).









From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Sep 14 05:48:30 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 14 Sep 2007 11:48:30 +0200
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com><46e7974d$0$31726$426a74cc@news.free.fr><fc8fc9$4qa$1@news2.carnet.hr>
	<5kq1hgF4r90oU1@mid.individual.net><1189618530.872819.136450@57g2000hsv.googlegroups.com><1189619033.968437.286580@g4g2000hsf.googlegroups.com><5kr8vlF53m8gU3@mid.individual.net><1189643616.826715.58150@d55g2000hsg.googlegroups.com><5ksoaoF5am8cU1@mid.individual.net><1189701793.466307.93210@g4g2000hsf.googlegroups.com><5ktfjqF5ctrvU2@mid.individual.net><46e98fd8$0$27757$426a34cc@news.free.fr>
	<5ktre7F5ig0vU1@mid.individual.net>
	<mailman.522.1189752157.2658.python-list@python.org>
Message-ID: <5kv3neF5mo3hU3@mid.individual.net>

Terry Reedy wrote:
> No it does not.  The method wrapping is done at runtine.  The
> compiler is ignorant of the wrapping that will be done.

Agreed, after reading the docs.
 
>>>> dis.dis(f)
>   1           0 LOAD_GLOBAL              0 (c)
>               3 LOAD_ATTR                1 (meth)
>               6 CALL_FUNCTION            0
>               9 RETURN_VALUE
> 
> The function gets wrapped as a bound method as part of LOAD_ATTR. 
> When the compiler sees <expr>(args), it does not know and does not
> care about the
> particular type that <expr> will become.  It just assumes that it
> will be
> callable and emits the code to call it.  Consider

That's interesting. BTW, do you know something (apart from the dis
docs) that's worth reading if you're interested in Python byte
code?

Regards,


Bj?rn

-- 
BOFH excuse #138:

BNC (brain not connected)



From guettli.usenet at thomas-guettler.de  Wed Sep 19 11:08:29 2007
From: guettli.usenet at thomas-guettler.de (Thomas Guettler)
Date: 19 Sep 2007 15:08:29 GMT
Subject: AttributeError: How to list existing attributes?
References: <5lc8lbF79ba8U1@mid.individual.net>
	<5lc9mtF7hll5U1@mid.uni-berlin.de>
Message-ID: <5lcsbdF7ku5hU1@mid.individual.net>

Diez B. Roggisch wrote:

> Thomas Guettler wrote:
>
>> Hi,
>> 
>> how can you list the attributes of an object if you catch an
>> AttributeError?
>> 
>> I couldn't find a reference in the exception object, which
>> points to the object.
>> 
>> I want to call dir() on the object to list the user the known
>> attributes.
>> 
>> Is there a way to find the object by inspecting the stacktrace?
>
> By looking at the code at the line the stacktrace lists? And at least for
> me, there is a type-information as well:

Hello,

I  want to customize the debug tracebacks displayed in django.
It is not to find one particular error. That's why changing the
source is not a solution.

 Thomas

-- 
Thomas G?ttler, http://www.thomas-guettler.de/ http://www.tbz-pariv.de/
E-Mail: guettli (*) thomas-guettler + de
Spam Catcher: niemand.leermann at thomas-guettler.de



From steve at holdenweb.com  Wed Sep 26 12:49:10 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 26 Sep 2007 12:49:10 -0400
Subject: regex with specific list of string
In-Reply-To: <1190821357.753909.178210@50g2000hsm.googlegroups.com>
References: <1190821357.753909.178210@50g2000hsm.googlegroups.com>
Message-ID: <fde2i4$9k1$1@sea.gmane.org>

james_027 wrote:
> hi,
> 
> how do I regex that could check on any of the value that match any one
> of these ... 'jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug',
> 'sep', 'oct', 'nov', 'dec'
> 
> Thanks

 >>> patr = re.compile('jan|feb|mar|apr|may|jun|jul|aug|sep|nov|oct|dec')
 >>> patr.match("jul")
<_sre.SRE_Match object at 0x7ff28ad8>
 >>> patr.match("nosuch")
 >>>

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From zentraders at gmail.com  Thu Sep 27 20:58:52 2007
From: zentraders at gmail.com (Zentrader)
Date: Thu, 27 Sep 2007 17:58:52 -0700
Subject: ValueError: too many values to unpack
In-Reply-To: <mailman.1172.1190911576.2658.python-list@python.org>
References: <mailman.1172.1190911576.2658.python-list@python.org>
Message-ID: <1190941132.060599.89300@57g2000hsv.googlegroups.com>

On Sep 27, 9:46 am, Shawn Minisall <trekker... at comcast.net> wrote:
> I am trying to read a few lines of a file with multiple values, the rest
> are single and are reading in fine.
>
> With the multiple value lines, python says this "ValueError: too many
> values to unpack"
>
> I've googled it and it says that happens when you have too few or too
> many strings that don't match with the variables in number your trying
> to assign them too.  Below are the lines in reading in:
>
> line 3 - 19.18    29.15    78.75    212.10
> line 4 - 100    20    410.29
> And this is the code I'm using:
>
>    #read withdrawls from file on line3
>    line = infile.readline()
>      #split withdrawls up
>    withdraw1, withdraw2, withdraw3, withdraw4 = string.split(line, "\t")
>
>    #read deposits from file on line4
>    line = infile.readline()
>    #split deposits up
>    deposit1, deposit2, deposit3 = string.split(line, "\t")
>
> I have 4 strings to match line 3 and 3 to match the 3 on line 4...any
> thoughts?
>
> thx

A string.split returns a list so you don't have to know how many
elements there are beforehand.  A simple example
withdraw = line.split("\t")
if len(withdraw) == 3:
   match_3(withdraw)
elif len(withdraw) == 4::
   match_4(withdraw)
else:
   print "line.split() is not 3 or 4", withdraw



From michele.simionato at gmail.com  Thu Sep 20 11:36:31 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Thu, 20 Sep 2007 15:36:31 -0000
Subject: super() doesn't get superclass
In-Reply-To: <mailman.807.1190298736.2658.python-list@python.org>
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au>
	<46f0fba0$0$29605$426a34cc@news.free.fr>
	<1190199134.791808.267110@22g2000hsm.googlegroups.com>
	<mailman.778.1190225664.2658.python-list@python.org>
	<1190256493.827576.139470@r29g2000hsg.googlegroups.com>
	<mailman.807.1190298736.2658.python-list@python.org>
Message-ID: <1190302591.145295.213170@k79g2000hse.googlegroups.com>

On Sep 20, 4:31 pm, "Marshall T. Vandegrift" <llas... at gmail.com>
wrote:
> Michele Simionato <michele.simion... at gmail.com> writes:
> > I am not against mixins (even if I am certainly very much against the
> > *abuse* of mixins, such as in Zope 2). What I would advocate (but I
> > realize that it will never happen in Python) is single inheritance +
> > mixins a la Ruby.
>
> Ruby might be a bad example here.  Although the Ruby language syntax
> only supports single inheritance, mixins are implemented as multiple
> inheritance under the hood.  That is, inheriting from a class and
> including a class as a mixin modifies the sub-/mixing class in exactly
> the same way.
>
> -Marshall

The difference is that there is no cooperation, so you don't need to
bang your
head in order to understand the method resolution order.

     Michele Simionato



From vinay_sajip at yahoo.co.uk  Mon Sep 24 18:29:38 2007
From: vinay_sajip at yahoo.co.uk (Vinay Sajip)
Date: Mon, 24 Sep 2007 15:29:38 -0700
Subject: strange behavious of the logging module?
In-Reply-To: <fd8l4n$9o1$03$1@news.t-online.com>
References: <fd6n9i$8hc$1@news1.zdv.uni-mainz.de>
	<fd7nf6$g14$02$1@news.t-online.com>
	<1190643051.084144.230220@o80g2000hse.googlegroups.com>
	<fd8l4n$9o1$03$1@news.t-online.com>
Message-ID: <1190672978.233964.232900@g4g2000hsf.googlegroups.com>

On Sep 24, 4:29 pm, Peter Otten <__pete... at web.de> wrote:
> Vinay Sajip wrote:
> > On Sep 24, 8:03 am, Peter Otten <__pete... at web.de> wrote:
>
> >> It would still be a good idea to file a bug report.
>
> > Not sure where the bug is. The script below, when called, prints
> > "Information" to the console and "INFO     some_func Information" to
> > mc_rigid.log, as I would expect. (Python 2.5.1)
>
> I get
>
> $ python vinaj.py
> Information
> $ cat mc_rigid.log
> INFO     info     Information
>
> Maybe a platform issue (I'm on Ubuntu 7.04)?
>
> It seems Logger.findCaller() gets puzzled by the following discrepancy:
>
> >>>logging.info.func_code.co_filename
>
> 'logging/__init__.py'>>>logging._srcfile
>
> '/usr/lib/python2.5/logging/__init__.py'
>
> I don't think I have messed with paths manually on that machine, by the
> way.
>

This is a known bug, and not specifically related to logging, though
it sometimes manifests itself via logging:

http://bugs.python.org/issue1180193

Regards,

Vinay



From steve at REMOVE-THIS-cybersource.com.au  Sun Sep 16 05:50:39 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sun, 16 Sep 2007 09:50:39 -0000
Subject: Needless copying in iterations?
References: <fchk59$mm3$1@daisy.noc.ucla.edu>
	<5l3ab6F5v20uU3@mid.uni-berlin.de> <13eourdrne86e61@corp.supernews.com>
	<874phv42to.fsf@benfinney.id.au>
Message-ID: <13epv3fnb6bak15@corp.supernews.com>

On Sun, 16 Sep 2007 15:05:55 +1000, Ben Finney wrote:

> Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> writes:
> 
>> In *general* the compiler can't tell, but in specific cases it could. A
>> (hypothetical) optimizing compiler would tell the difference between:
>> 
>> for item in alist[1:5]:
>>     print item # no possible side-effects
> 
> The 'print' statement converts the 'item' to a str. That conversion
> could, in a pathological case, have a side-effect (say, if the class of
> 'item' had an overridden '__str__' method with side effects), and the
> compiler can't know this isn't a pathological case.

Fair enough... but I'm reminded of a rant by Joel Spolsky about GUI 
design:

'...programmers have tended to think that if users are allowed to resize 
and move windows, they should have complete flexibility over where these 
windows go, right down to the last pixel. After all, positioning a window 
2 pixels from the top of the screen is "equally likely" as positioning a 
window exactly at the top of the screen.'

http://www.joelonsoftware.com/uibook/fog0000000249.html

(three quarters of the way down, in Chapter 7.)

Maybe I'm being unfair, but it seems to me that the attitude is similar: 
'there's no point optimizing the common case of printing (say) ints 
stored in a list, Just In Case the programmer wants the incredibly rare 
case of setting sys.stdout to some wacky object that modifies the list 
he's iterating over. It could happen.'

*shrug* But apart from the occasional smart-alec who does it just to 
demonstrate that it is possible, it probably never has.

It seems to me that the "consenting adults" philosophy of Python doesn't 
extend to the compiler, and perhaps it should. Maybe Python could 
optimize common cases, and if developers wanted to do wacky things, let 
them turn optimization off on a module-by-module basis.

Or even function-by-function. Wouldn't it be nice to have decorators that 
could optimize the functions they decorated?


>> for item in alist[1:5]:
>>     alist.append(item) # side-effects DON'T matter
> 
> The compiler doesn't know that, at the time of invocation,
> 'alist.append' doesn't have side effects that matter.

It might if it knows what type alist is, and how long it is (as Marc 
Rintsch points out). That's why I used "alist" in my example rather than 
"an_arbitrary_sequence".


> The compiler for a dynamic language like Python has very little absolute
> "no significant side-effect in these specific cases" guarantee of the
> kind you're assuming even in the cases you choose for contrast with the
> ones that *do* have significant side-effects.

Yes, in general one might not be able to make those guarantees, but still 
there are common cases where you can. That's how Psycho works.

The point is rather moot, since CPython (and probably other Pythons) do 
almost no optimizations. But just because Python is a dynamic language 
doesn't mean there are no optimizations possible: Haskell is a dynamic 
language, and there are optimizing compilers for it. Of course, it is 
much simpler for Haskell, because of the type system it uses.

The CPython compiler already does a couple of source-code optimizations 
(ignores some unused strings; some constant folding) and at least one 
runtime optimization (string concatenation is no longer _always_ slow):

http://utcc.utoronto.ca/~cks/space/blog/python/ExaminingStringConcatOpt

Because of its very nature, optimizing Python is hard. Even something as 
simple as tail-call recursion optimization is verboten, because Guido 
considers good stack traces more important than preventing stack 
overflows in the first place:

http://www.tratt.net/laurie/tech_articles/articles/tail_call_optimization

Anyway, I'm not really complaining. I like Python, I'm grateful for the 
work the Python-dev people have already done, and I'm in no position to 
volunteer to write an optimizing compiler. And it may be that, regardless 
of how smart you make the compiler, Python simply can't be optimized 
because of design decisions made back in 1990-whatever when Guido first 
started his grand plan.



-- 
Steven.


From jergosh at wp.pl  Sat Sep  1 06:54:00 2007
From: jergosh at wp.pl (=?UTF-8?B?R3J6ZWdvcnogU8WCb2Rrb3dpY3o=?=)
Date: Sat, 01 Sep 2007 12:54:00 +0200
Subject: So what exactly is a complex number?
In-Reply-To: <451mq4-les.ln1@ozzie.tundraware.com>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>	<mailman.212.1188576194.28954.python-list@python.org>
	<451mq4-les.ln1@ozzie.tundraware.com>
Message-ID: <46D944C8.6090802@wp.pl>


> Here is a simple explanation (and it is not complete by a long shot).
>
> A number by itself is called a "scalar".  For example, when I say,
> "I have 23 apples", the "23" is a scalar that just represents an
> amount in this case.
>
> One of the most common uses for Complex Numbers is in what are
> called "vectors".  In a vector, you have both an amount and
> a *direction*.  For example, I can say, "I threw 23 apples in the air
> at a 45 degree angle".  Complex Numbers let us encode both
> the magnitude (23) and the direction (45 degrees) as a "number".
>
> There are actually two ways to represent Complex Numbers.
> One is called the "rectangular" form, the other the "polar"
> form, but both do the same thing - they encode a vector.
>
> Complex Numbers show up all over the place in engineering and
> science problems.  Languages like Python that have Complex Numbers
> as a first class data type allow you do to *arithmetic* on them
> (add, subtract, etc.).  This makes Python very useful when solving
> problems for engineering, science, navigation, and so forth.
>
>
> HTH,
>   
You're mixing definition with application. You didn't say a word about 
what complex numbers are, not a word about the imaginary unit, where 
does it come from, why is it 'imaginary' etc.  Since we're being arses 
here I'd hazard a guess you were educated in the USA where doing without 
understanding has been mastered by teachers and students alike. You're 
explanation of what vectors are is equally bogus but this has already 
been pointed out. I'd also like to see a three-dimensional vector 
represented by a complex number.

Besides, I find Wikipedia extremely unhelpful for learning maths, partly 
beacuse of it's non-linear nature (while reading an article you come 
across a term you don't know, follow a link, then follow three others 
and over the next 4 hours you find out lots of interesting things which 
are sadly at best tangential to the initial subject) and because it's 
written by people who already know a lot about the subject and take many 
things for granted. This seems to be a decent introduction: 
http://www.ping.be/~ping1339/complget.htm

Regards,
Greg


From hrishys at yahoo.co.uk  Wed Sep 26 02:35:25 2007
From: hrishys at yahoo.co.uk (hrishy)
Date: Wed, 26 Sep 2007 07:35:25 +0100 (BST)
Subject: Hello Gabriel cant help noticing you
In-Reply-To: <op.ty8ua9v4x6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <41607.51503.qm@web27811.mail.ukl.yahoo.com>

Hi Gabriel

I couldnt help but to write this mail.

I am not a python programmer just a shell script coder
and i am planning to learn some decent python and
raise my level from a shell script junkie to a Python
gentleman the way you explain things and show it in
code is simply amazing.

I particularly liked the way you explained that
Regular expression stuff to parse that XML i am just
awestruck.

NO BOOK/ARTICLE EVER OUT THERE IN MY MIND HAS DONE IT
SO CLEANLY AS YOU DID IT.

regards
Hrishy


      ___________________________________________________________
Yahoo! Answers - Got a question? Someone out there knows the answer. Try it
now.
http://uk.answers.yahoo.com/ 


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Sep 14 03:17:48 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 14 Sep 2007 09:17:48 +0200
Subject: Python 3K or Python 2.9?
In-Reply-To: <5ktre7F5ig0vU1@mid.individual.net>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<5ksoaoF5am8cU1@mid.individual.net>
	<1189701793.466307.93210@g4g2000hsf.googlegroups.com>
	<5ktfjqF5ctrvU2@mid.individual.net>
	<46e98fd8$0$27757$426a34cc@news.free.fr>
	<5ktre7F5ig0vU1@mid.individual.net>
Message-ID: <46ea3591$0$21741$426a34cc@news.free.fr>

Bjoern Schliessmann a ?crit :
> Bruno Desthuilliers wrote:
>> Bjoern Schliessmann a ?crit :
> 
>>> Why don't you make a preprocessor which accepts method
>>> declarations without "self" and fixes them?
>> The problem being that there's no such thing as a "method
>> declaration" in Python 
> 
> Yep, there are only definitions. I'm sorry.
> 
>> - only functions being attributes of a class...
> 
> What, IYHO, is the difference between a method and a function?

A method is a thin wrapper around a function, usually instanciated and 
returned by the __get__ method [1] of the function itself when the 
function is looked up as an attribute of a class or an instance:

 >>> class Foo(object):
...     def meth(self):
...             print "in %s meth" % self
...
 >>> Foo.__dict__['meth']
<function meth at 0xb7d76374>
 >>> Foo.meth
<unbound method Foo.meth>
 >>> Foo().meth
<bound method Foo.meth of <__main__.Foo object at 0xb7d7acac>>
 >>>

[1] you may want to read about the descriptor protocol which is the base 
mechanism on which methods and properties (computed attributes) are based.

>> (ok, I know, you meant "functions declared within a class
>> statement").
> 
> I think that those functions _are_ special ones

They aren't, and you should perhaps read the manual - all this is 
documented.

> since the compiler
> is able to make "method(instance, a, b)" out of 
> "instance.method(a, b)".

Once again, the compiler has *nothing* to do with this. Else, how could 
you do this:

 >>> def fun(obj):
...     print obj
...
 >>> Foo.fun = fun
 >>> Foo.fun
<unbound method Foo.fun>
 >>> Foo().fun
<bound method Foo.fun of <__main__.Foo object at 0xb7d7ad6c>>
 >>> fun
<function fun at 0xb7d763ac>
 >>> Foo.__dict__['fun']
<function fun at 0xb7d763ac>
 >>>


> So IMHO, "method definition" makes sense.

It doesn't.


From __peter__ at web.de  Sat Sep  8 04:07:14 2007
From: __peter__ at web.de (Peter Otten)
Date: Sat, 8 Sep 2007 10:07:14 +0200
Subject: unexpected behavior: did i create a pointer?
References: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>
	<46e11dfe$0$4517$9b4e6d93@newsspool3.arcor-online.net>
	<pan.2007.09.07.10.40.46@REMOVE.THIS.cybersource.com.au>
	<fbrdsm$5f3$01$1@news.t-online.com>
	<13e2jdobu2kqkf1@corp.supernews.com>
Message-ID: <fbtl7i$um3$02$2@news.t-online.com>

Am Fri, 07 Sep 2007 13:10:16 +0000 schrieb Grant Edwards:

> On 2007-09-07, Peter Otten <__peter__ at web.de> wrote:
>> Am Fri, 07 Sep 2007 10:40:47 +0000 schrieb Steven D'Aprano:
>>
>>> Python doesn't have any pointers.
>>
>> Thinking of python variables or "names" as pointers should
>> get you a long way when trying to understand python's behaviour.
> 
> But thinking of them as names bound to objects will get you
> further (and get you there faster). ;)

Understanding a new system in terms of one I already know works for me.
When terminology and the system it describes make a perfect fit that is a
strong indication that you have reached a dead end.

Peter


From steve at REMOVE-THIS-cybersource.com.au  Sat Sep 15 01:50:44 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sat, 15 Sep 2007 05:50:44 -0000
Subject: How to avoid overflow errors
References: <13em8vnr527rq20@corp.supernews.com>
	<fcfbj0$br$1@daisy.noc.ucla.edu>
Message-ID: <13emslk6n80mmf6@corp.supernews.com>

On Fri, 14 Sep 2007 18:19:45 -0700, James Stroud wrote:

>> How do I subclass int and/or long so that my class also auto-converts
>> only when needed?
>> 
>> 
>> 
>> 
> Use __new__.

The disadvantage of that is that your example code requires me to 
duplicate my methods in the long version and the int version. It's easy 
enough to work around that (class factory function) but it just seems all 
rather untidy...


-- 
Steven.


From gherzig at fmed.uba.ar  Thu Sep  6 17:53:56 2007
From: gherzig at fmed.uba.ar (Gerardo Herzig)
Date: Thu, 06 Sep 2007 18:53:56 -0300
Subject: parsing long `To' and 'Cc' from email
In-Reply-To: <fbpp5h$pje$1@sea.gmane.org>
References: <46E06244.80308@fmed.uba.ar> <fbpp5h$pje$1@sea.gmane.org>
Message-ID: <46E076F4.20704@fmed.uba.ar>

Steve Holden wrote:

>Gerardo Herzig wrote:
>  
>
>>Hi all. Im trying to develop yet another email filter. Just for fun for 
>>now. Im having a little trouble parsing long 'To' and 'Cc' headers. 
>>Sometimes p.e. the 'To' header comes like
>>
>>'account1 at site.com, account at site2.com'
>>others comes like
>>'"My self" <my.account at self.net>, "My brother" <brother.account at self.net>',
>>other times a \r\t comes inside the `To' header. And any combination of 
>>the above mentioned (and shurely more) can ocur.
>>
>>the email.* package dont seems to parse that kind of headers 
>>`correctly'. What i want is to get a list with all the email address in 
>>the `To' header.
>>
>>Someone know if there is a more sofisticated parser for doing this?
>>
>>    
>>
>Have you tried using email.utils.getaddresses()?
>
>regards
>  Steve
>  
>
No, i was not. And it works just perfect! One day i will make a hard 
question!! I wonder why this getaddresess() function is not a method 
into the HeaderParser class.

Ok, so my content-filter can continue now. Thanks Steve!
Gerardo


From arnodel at googlemail.com  Mon Sep 17 14:01:48 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 17 Sep 2007 18:01:48 -0000
Subject: how to join array of integers?
In-Reply-To: <87hcltnv2z.fsf@rudin.co.uk>
References: <1189859762.563599.269270@g4g2000hsf.googlegroups.com>
	<a23effaf0709150551g19c611eqe1c912acf02306d3@mail.gmail.com>
	<mailman.577.1189864628.2658.python-list@python.org>
	<13eos6ihf2mjg4a@corp.supernews.com> <87lkb6o4bx.fsf@rudin.co.uk>
	<13erbtbos7ld123@corp.supernews.com> <87hcltnv2z.fsf@rudin.co.uk>
Message-ID: <1190052108.347104.266250@y42g2000hsy.googlegroups.com>

On Sep 17, 4:57 pm, Paul Rudin <paul.nos... at rudin.co.uk> wrote:
[...]
> Although it's not clear to me why the join method needs a sequence
> rather than just an iterator.

Pure guess (I haven't looked at the code): the join method needs to
know the length of the string it builds in order to allocate the
correct amount of memory, therefore needs to traverse the iterable
object it is joining *twice* (find the length, allocate, fill in)?

--
Arnaud




From m.n.summerfield at googlemail.com  Tue Sep 25 07:51:01 2007
From: m.n.summerfield at googlemail.com (Mark Summerfield)
Date: Tue, 25 Sep 2007 11:51:01 -0000
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <1190719164.587009.206340@19g2000hsx.googlegroups.com>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
Message-ID: <1190721061.573653.304110@r29g2000hsg.googlegroups.com>

On 25 Sep, 12:19, Paul Hankin <paul.han... at gmail.com> wrote:
> Recall sorted...
>     sorted(iterable, cmp=None, key=None, reverse=False) --> new sorted
> list
>
> So why not construct sorteddicts using the same idea of sortedness?
>
> sorteddict((mapping | sequence | nothing), cmp=None, key=None,
> reverse=None)
>
> Then we can specify the exact behaviour of sorteddicts: it's the same
> as a regular dict, except when the order of keys is important they're
> ordered as if they were sorted by sorted(keys, cmp=sd._cmp,
> key=sd._key, reverse=sd._reverse). Here I imagine cmp, key and reverse
> are stored in the new sorteddict as attributes _cmp, _key, _reverse -
> obviously the actual implementation may differ.
>
> This has the benefit of making sorteddict's behaviour explicit and
> easy to understand, and doesn't introduce a new sorting API when we
> already have a perfectly decent one.
>
> The only problem here is the **kwargs form of the dict constructor
> doesn't translate as we're using keyword args to pass in the sort
> criterion. Perhaps someone has an idea of how this can be solved. If
> nothing else, this constructor could be dropped for sorteddicts, and
> sorteddict(dict(**kwargs), cmp=..., key=..., reverse=...) when that
> behaviour is wanted.
>
> I don't like the integral indexing idea or the slicing: indexing and
> slicing are already part of python and it's bad to have different
> syntax for the same concept on sorteddicts. I'd say it's not an
> important enough for sorteddicts anyway.
>
> --
> Paul Hankin


This makes a lot of sense to me. But how do you envisage it would be
implemented?




From bdesth.quelquechose at free.quelquepart.fr  Sat Sep  8 14:32:15 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 08 Sep 2007 20:32:15 +0200
Subject: Enum class with ToString functionality
In-Reply-To: <1189458697.707725.244980@g4g2000hsf.googlegroups.com>
References: <1189416537.050002.61120@r34g2000hsd.googlegroups.com>
	<1189425154.788466.132370@d55g2000hsg.googlegroups.com>
	<46e59bf7$0$21897$426a74cc@news.free.fr>
	<1189458697.707725.244980@g4g2000hsf.googlegroups.com>
Message-ID: <46e5b7ad$0$27788$426a74cc@news.free.fr>

TheFlyingDutchman a ?crit :
> On Sep 8, 9:52 am, Bruno Desthuilliers
> <bdesth.quelquech... at free.quelquepart.fr> wrote:
> 
>>TheFlyingDutchman a ?crit :
(snip)
>>>class TestOutcomes:
>>>    PASSED = 0
>>>    FAILED = 1
>>>    ABORTED = 2
>>
>>>    def ToString(outcome):
>>>        if  outcome == TestOutcomes.PASSED:
>>>           return "Passed"
>>>        elif outcome == TestOutcomes.FAILED :
>>>           return "Failed"
>>>        else:
>>>           return "Aborted"
>>
>>>    ToString = staticmethod(ToString)
>>
(snip)
>>Technically correct, but totally unpythonic.
> 
> 
> Speaking of unpythonic, I would call
> 
>   ToString = staticmethod(ToString)
> 
> A Perlific syntax.

Nope, just a good ole HOF.

But nowadays, it's usually written this way:

@staticmethod
def some_static_method():
    pass

> 
>>May I suggest some reading ?http://dirtsimple.org/2004/12/python-is-not-java.html
>  
> Well the Foo.Foo complaint is bogus:
> 
> from Foo import Foo
> 

Yes. And properties are bogus - just use getters and setters.

Seriously, writing Java in Python is definitively on the masochist side. 
  But if you like pain...


From paddy3118 at googlemail.com  Sun Sep 23 00:48:59 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Sun, 23 Sep 2007 04:48:59 -0000
Subject: Getting rid of bitwise operators in Python 3?
In-Reply-To: <46f57841$1$15333$4c368faf@roadrunner.com>
References: <46f49740$0$32514$4c368faf@roadrunner.com>
	<1190472612.942736.325850@w3g2000hsg.googlegroups.com>
	<46f57841$1$15333$4c368faf@roadrunner.com>
Message-ID: <1190522939.547177.294380@22g2000hsm.googlegroups.com>

On Sep 22, 8:29 pm, Carl Banks <pavlovevide... at gmail.com> wrote:
> On Sat, 22 Sep 2007 14:50:12 +0000, Paddy wrote:
> > Sorry Carl,
> > I think *you* may not have much need for bitwise operators but others,
> > including myself do. No matter what the usage found, I would think
> > replacing bitwise operators by function calls a retrograde step.
>
> Well, if people are going to take the suggestion this personally, maybe
> that's reason enough not to bother.
>
> Carl Banks

Carl, don't snipe. You asked and received many answers from personal
viewpoints.
Tally and move on. - Paddy.



From bj_666 at gmx.net  Mon Sep 10 04:19:36 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 10 Sep 2007 08:19:36 GMT
Subject: concise code (beginner)
References: <13dsvqrqivtf092@corp.supernews.com>
	<13dv4uqqb806ff0@corp.supernews.com> <fbqo83$8fd$1@lust.ihug.co.nz>
	<13e99756io95p66@corp.supernews.com> <fc2c86$i1l$4@lust.ihug.co.nz>
	<13e9taoa44icgb4@corp.supernews.com>
Message-ID: <5kkd0oF3vfqqU4@mid.uni-berlin.de>

On Mon, 10 Sep 2007 17:42:16 +1000, bambam wrote:

> "Lawrence D'Oliveiro" <ldo at geek-central.gen.new_zealand> wrote in
> message news:fc2c86$i1l$4 at lust.ihug.co.nz...
>> In message <13e99756io95p66 at corp.supernews.com>, bambam wrote:
>>
>>> Thank you,
>>
>> Don't top-post.
>
> I have a number of  news readers here, but all of them work
> better  with top-posting, and in none of them is top posting
> a problem.

This is not about *you* having any problems but all the people who must
read your top postings.  Most of them, at least in this news group, expect
that a text read from top to bottom follows time from earliest to latest.
And as most here don't top post, a conversation with a top poster starts
to get mixed and even harder to follow.

Ciao,
	Marc 'BlackJack' Rintsch


From wizzardx at gmail.com  Sat Sep  8 14:21:29 2007
From: wizzardx at gmail.com (David)
Date: Sat, 8 Sep 2007 20:21:29 +0200
Subject: How to insert in a string @ a index
In-Reply-To: <1189274564.462664.131240@22g2000hsm.googlegroups.com>
References: <1189274564.462664.131240@22g2000hsm.googlegroups.com>
Message-ID: <18c1e6480709081121h21eac6d2s9d1e06a91ee8d6af@mail.gmail.com>

> The python doesn't supports t1[keyword_index]="XYZhello" (string
> object assignment is not supported). How do I get to this problem? Any
> sugguestions?

Build a new string var using slicing. eg:

t1 = t1[:keyword_index] + "XYZhello" + [keyword_index]

Or use string formatting:

t1 = "your text bla bla %s bla bla bla %s bla bla" % (string1, string2)


From laurent.pointal at limsi.fr  Mon Sep 17 04:47:48 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Mon, 17 Sep 2007 10:47:48 +0200
Subject: SVG to raster conversion.
In-Reply-To: <mailman.613.1189958286.2658.python-list@python.org>
References: <mailman.613.1189958286.2658.python-list@python.org>
Message-ID: <fclevk$2rt$2@news2.u-psud.fr>

J. Cliff Dyer a ?crit :
> Does anybody know a good solution (preferably in python) for rasterizing
> SVG or other vector graphics.
> 
> I'm thinking something like
> 
> vector_image = SVGFile(path_to_image)
> raster_image = vector_image.rasterize(format, (width, height), dpi)
> raster_image.write(out_file)
> 
> Thanks for any pointers you might have.

Another link to complement other replies:

Maybe witgh Cairo:

Library:
http://cairographics.org/

SVG support:
http://cairographics.org/manual/cairo-SVG-Surfaces.html

Python binding:
http://cairographics.org/bindings/


A+

Laurent.


From kenneth.m.mcdonald at sbcglobal.net  Wed Sep  5 15:02:06 2007
From: kenneth.m.mcdonald at sbcglobal.net (Kenneth McDonald)
Date: Wed, 05 Sep 2007 14:02:06 -0500
Subject: Any syntactic cleanup likely for Py3? And what about doc standards?
Message-ID: <46DEFD2E.5050205@sbcglobal.net>

The reading I've done so far on Python 3 (alpha announcement, meta-PEP, 
some other PEPs) is generally encouraging, but there doesn't seem to be 
much on cleaning up the syntax, which has become uglier over time as 
features have been added on to an original syntax that wasn't designed 
to support them. It seems to me (from what little I've read--I admit 
that it's impossible to know for sure without experimenting quite a bit, 
for which I don't currently have the time) that new features such as 
multimethods might just make things more confusing (especially for 
newbies) in a lot of ways, without appropriate syntactic support.

Currently the most obvious example of this is Python 2.5's way of 
defining properties, which is ugly. leads often to writing of 
unnecessary code, and certainly doesn't make property code clear to a 
reader. Contrast this to the way properties (things that look like an 
instance variable but are actually bound to methods) are handled in Ruby 
and (IIRC, this also does a decent job) C#.

On the other hand, it does seem that some new syntactic support for 
other features will be added, so perhaps I'm just missing whichever PEPs 
talk about going back and adding cleaner syntax for existing features...?

Finally, another thing I've perhaps missed, but I can't see anything in 
what I've gone through, about correcting of of what I see to be one of 
Python's most long-standing really serious flaws, which is the lack of 
an official standard documentation markup syntax for writing 
documentation in code. This isn't even a matter of getting something 
developed, it's simply a matter of Guido and the Powers That Be 
bestowing their benediction on one of the several adequate or better 
documentation toolsets out there, so that more of us (slowly) start 
using it. Eventually this will result in work on the toolset itself, 
more people will be willing to use it, and there'll be a nice virtuous 
circle. Given how much more capable D'Oxygen is than any of the 
Python-specific solutions, I'd vote for D'Oxygen myself, but I'd prefer 
to have almost anything fill in this vacuum, rather than continue things 
the way they are.

As I say, I don't get the time I'd like to put into reading up on Py3, 
so please feel free to correct, point out references, etc. etc.

Thanks,
Ken


From tenax.raccoon at gmail.com  Mon Sep 10 09:47:46 2007
From: tenax.raccoon at gmail.com (Jason)
Date: Mon, 10 Sep 2007 06:47:46 -0700
Subject: Python syntax wart
In-Reply-To: <fbvvil$7dj$1@lust.ihug.co.nz>
References: <fbvvil$7dj$1@lust.ihug.co.nz>
Message-ID: <1189432066.374071.189370@57g2000hsv.googlegroups.com>

On Sep 8, 11:16 pm, Lawrence D'Oliveiro <l... at geek-
central.gen.new_zealand> wrote:
> The one thing I don't like about Python syntax is using backslashes to
> continue lines. Yes, you can avoid them if you can include parentheses
> somehow, but this isn't always possible.
>
> Possible:
>
>     if (
>             quitting
>         and
>             len(client["to_write"]) == 0
>         and
>             len(client["read"]) + client["to_read"] == 0
>     ) :
>         close_client(client, "shutting down")
>     #end if
>
> Not possible:
>
>     for \
>         Link \
>     in \
>         GetEachRecord \
>           (
>             "links",
>             ("from_episode",),
>             "to_episode = %s",
>             [EpisodeID],
>             "order by when_created"
>           ) \
>     :
>         out.write \
>           (
>                 "<P><A HREF=\"%s\">Back to episode %d</A>\n"
>             %
>                 (
>                     LinkToMe({"ep" : Link["from_episode"]}),
>                     Link["from_episode"]
>                 )
>           )
>     #end for

Python doesn't prevent you from writing ugly code, using poor variable
names, or doing other silly things.  The rules on indention require
that you are at least consistent on a given line.  That said, the
backslash simply continues the line, and I don't see why your (ugly,
IMO) code is impossible.  Here's some similarly schizophrenically
formatted code that I just tried:

>>> for \
...     l\
... in \
...     (\
...             1,
...                 2,
...             3
...     )\
... :
...     print\
...             "This is "\
...                     "poorly "\
...                                             "formatted!",\
... l
...
This is poorly formatted! 1
This is poorly formatted! 2
This is poorly formatted! 3
>>>

Looks like it runs to me.  In general, I'd recommend that you avoid
such nonsense spacing and alignment, and use wrappers, generators, and
other Python constructs to help write more sensible code.

  --Jason



From daniel.j.larsson at gmail.com  Tue Sep  4 20:15:21 2007
From: daniel.j.larsson at gmail.com (Daniel Larsson)
Date: Wed, 5 Sep 2007 02:15:21 +0200
Subject: doctest and decorators
In-Reply-To: <op.tx5lnhazx6zn5v@gabriel2.softlabbsas.com.ar>
References: <2bfa72fa0709041329i14b5b547i2eb85250f7547da@mail.gmail.com>
	<200709042316.08263.python@cx.hu>
	<2bfa72fa0709041452o72d9a98fp939852d061a2cda3@mail.gmail.com>
	<200709050009.46380.python@cx.hu>
	<2bfa72fa0709041529g9d5ac22hce3a55d5357b1a1c@mail.gmail.com>
	<op.tx5lnhazx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <2bfa72fa0709041715g72006d99x731f4e35f1dd8fc3@mail.gmail.com>

On 9/5/07, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>
> En Tue, 04 Sep 2007 19:29:11 -0300, Daniel Larsson
> <daniel.j.larsson at gmail.com> escribi?:
>
> > On 9/5/07, Ferenczi Viktor <python at cx.hu> wrote:
> >>
> >> > > @functools.wraps(f)
> >> > > Pass the function to be wrapped by the decorator to the wraps
> >> function.
> >> > Ooops, right. That doesn't change the fact that decorated functions
> >> get
> >> > hidden from doctest though.
> >
> >
> > I have no issue when the decorator is defined in the same module as the
> > decorated function, my problem is running doctests on functions using an
> > imported decorator. Having to implement the decorator in every source
> > module
> > isn't very practical. Try splitting your module in two, as I did, and
> run
> > with -v, and you'll see the problem.
>
> Looks like a bug. doctest is failing to recognize that the decorated
> function belongs to the module being tested.
>
> A simple patch: In doctest.py, method _from_module, near line 840, you
> have these lines:
>
>          elif inspect.getmodule(object) is not None:
>              return module is inspect.getmodule(object)
>
> Move them up, just before the line:
>
>          elif inspect.isfunction(object):


Yes, that was basically what I did as well. It makes much more sense to
check __module__ first (which is modifiable) rather than func_globals (which
obviously isn't).

I would have guessed the inspect.getmodule check would cover the isclass
test as well (?)

This works fine in this case, but I'm not sure whether this breaks in
> other circumstances (but I can't think of a case when using
> inspect.getmodule() would not be appropiate).
>
> PS: I can't see any tests for decorated functions (except
> @classmethod/@staticmethod) in the library test suite. I'll try to add
> some and submit a patch.
>
> --
> Gabriel Genellina
>
> --
> http://mail.python.org/mailman/listinfo/python-list
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From ricaraoz at gmail.com  Sat Sep  1 08:45:32 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Sat, 01 Sep 2007 09:45:32 -0300
Subject: list index() (OT)
In-Reply-To: <1188631457.050512.103060@y42g2000hsy.googlegroups.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>	<1cnfd31du01el95u70o8mjn9cb5r5aluiu@4ax.com>	<mailman.254.1188629922.28954.python-list@python.org>
	<1188631457.050512.103060@y42g2000hsy.googlegroups.com>
Message-ID: <46D95EEC.2000603@bigfoot.com>

Paddy wrote:
> On Sep 1, 7:57 am, "Hendrik van Rooyen" <m... at microcorp.co.za> wrote:
>> "Richie Hindle" <richi...ian.com> wrote:
>>> But - the word for someone who posts to the internet with the intention of
>>> stirring up trouble derives from the word for what fishermen do, not from
>>> the word for something that lives under a bridge.  It derives from "trolling
>>> for suckers" or "trolling for newbies".
>> So am I right in asserting that there is a difference in pronunciation
>> of the noun and the verb?
>>
>> He is a Troll - like the excellent frolic example
>> He likes to Troll - rhymes with roll?
>>
>> - Hendrik
> 
> No difference. A troll is a troll is a troll.
> 
> :-)
> 
> - Paddy.


BTW people , the word for what fishermen do is  T R A W L  and not troll
(Ha! and I'm not a native English speaker).


From bj_666 at gmx.net  Tue Sep 11 11:29:26 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 11 Sep 2007 15:29:26 GMT
Subject: memcpy
References: <1189449530.171049.323230@22g2000hsm.googlegroups.com>
	<5klnsbF3vfqqU10@mid.uni-berlin.de>
	<1189512598.410810.224340@y42g2000hsy.googlegroups.com>
	<5knhtpF4b65dU6@mid.uni-berlin.de>
	<1189516939.394375.248830@d55g2000hsg.googlegroups.com>
Message-ID: <5knqimF4b65dU7@mid.uni-berlin.de>

On Tue, 11 Sep 2007 06:22:19 -0700, Tim wrote:

> Is this what you mean? Python did not like the word c_types in front
> of POINTER. Do you know why?

Yes I know.  Read up how importing works.

> How can I re-declare a function's return type if it is declared
> somewhere else?

The return type of C functions wrapped by `ctypes` is always `int` until
you say otherwise.  How to do that is covered in the `ctypes`
tutorial/dicumentation.

>         test_data = numpy.ones(1000)
>         shared_memory_pointer = POINTER(c_float*256)

This binds the resulting "pointer" object to the name
`shared_memory_pointer`.

>         shared_memory_pointer =
> windll.kernel32.MapViewOfFile(hMapObject, FILE_MAP_ALL_ACCESS,
>             0, 0, TABLE_SHMEMSIZE)

And here you bind a different object to that name, so the first binding
has no effect.

Ciao,
	Marc 'BlackJack' Rintsch


From horpner at yahoo.com  Tue Sep 11 07:15:19 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Tue, 11 Sep 2007 11:15:19 GMT
Subject: Checking if elements are empty
References: <2323A6D37908A847A7C32F1E3662C80E010A0246@dc1ex01.air.org>
	<fbme5d$qa$1@sea.gmane.org>
	<mailman.93.1189003016.2658.python-list@python.org>
	<fbqedh$31g$1@lust.ihug.co.nz>
	<46e115e5$0$7691$9b4e6d93@newsspool2.arcor-online.net>
	<fbsqqs$efc$2@lust.ihug.co.nz>
	<46e2013a$0$7687$9b4e6d93@newsspool2.arcor-online.net>
	<slrnfead5j.mo.horpner@FIAD06.norwich.edu>
	<mailman.321.1189434264.2658.python-list@python.org>
	<slrnfeaoed.b4.horpner@FIAD06.norwich.edu>
	<mailman.329.1189439834.2658.python-list@python.org>
	<slrnfeauhp.14c.horpner@FIAD06.norwich.edu>
	<mailman.360.1189483878.2658.python-list@python.org>
Message-ID: <slrnfectjp.1n0.horpner@FIAD06.norwich.edu>

On 2007-09-10, Steve Holden <steve at holdenweb.com> wrote:
>> I have a quibble not with the functionality of the boolean check,
>> but with its expressiveness. if y[0] == "" expresses more, i.e.,
>> that I expect y[0] to contain a Python byte string.
>
> I have a quibble with a test that will raise an exception when
> the anticipated condition is true. Your test is patently
> absurd, as you would have discovered had you bothered to try
> it:

"if y[0] == "" expresses more, i.e., that I expect y[0] to
contain a Python byte string."

-- 
Neil Cerutti
Bach's death is attributed to the end of the Baroque era. --Music Lit Essay


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Sep 12 07:40:32 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 12 Sep 2007 13:40:32 +0200
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr>
Message-ID: <5kq1hgF4r90oU1@mid.individual.net>

Ivan Voras wrote:

> What does "self" have to do with an object model? It's an
> function/method argument that might as well be hidden in the
> compiler without ever touching the role it has (if not, why?). I
> agree that it's needless noise in a language.

If this was needless, why do C++ and Java have the "this" pointer?

Regards,


Bj?rn

-- 
BOFH excuse #390:

Increased sunspot activity.



From hniksic at xemacs.org  Fri Sep 21 09:37:33 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Fri, 21 Sep 2007 15:37:33 +0200
Subject: __contains__() : Bug or Feature ???
References: <1190380085.770828.19400@o80g2000hse.googlegroups.com>
Message-ID: <873ax8dtr6.fsf@mulj.homelinux.net>

"sebastien.lannez at gmail.com" <sebastien.lannez at gmail.com> writes:

> I need to overload the operator in and let him return an object
> ... It seems it is not a behavior Python expect :

Python expects it all right, but it intentionally converts the value
to a boolean.  The 'in' operator calls PySequence_Contains, which
returns a boolean value at the C level.  User-supplied __contains__ is
implemented as an adaptor in typeobject.c (slot_sq_contains).  It
takes the value returned by your __contains__ implementation and
converts it to 0 or 1.

I don't think you can overload 'in' as you want without pervasive
changes to CPython source code.


From george.sakkis at gmail.com  Thu Sep 27 15:54:40 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: Thu, 27 Sep 2007 19:54:40 -0000
Subject: ValueError: too many values to unpack
In-Reply-To: <mailman.1172.1190911576.2658.python-list@python.org>
References: <mailman.1172.1190911576.2658.python-list@python.org>
Message-ID: <1190922880.243988.149280@g4g2000hsf.googlegroups.com>

On Sep 27, 12:46 pm, Shawn Minisall <trekker... at comcast.net> wrote:
> I am trying to read a few lines of a file with multiple values, the rest
> are single and are reading in fine.
>
> With the multiple value lines, python says this "ValueError: too many
> values to unpack"
>
> I've googled it and it says that happens when you have too few or too
> many strings that don't match with the variables in number your trying
> to assign them too.  Below are the lines in reading in:
>
> line 3 - 19.18    29.15    78.75    212.10
> line 4 - 100    20    410.29
> And this is the code I'm using:
>
>    #read withdrawls from file on line3
>    line = infile.readline()
>      #split withdrawls up
>    withdraw1, withdraw2, withdraw3, withdraw4 = string.split(line, "\t")
>
>    #read deposits from file on line4
>    line = infile.readline()
>    #split deposits up
>    deposit1, deposit2, deposit3 = string.split(line, "\t")
>
> I have 4 strings to match line 3 and 3 to match the 3 on line 4...any
> thoughts?
>
> thx

Just print out the split without unpacking to see how many elements
there are actually present:

    print string.split(line, "\t")

By the way, most functions of the string module are deprecated in
favor of string methods; the above is better written as

    print line.split("\t")


HTH,
George



From vijayeee at gmail.com  Tue Sep  4 01:12:00 2007
From: vijayeee at gmail.com (vijayca)
Date: Tue, 04 Sep 2007 05:12:00 -0000
Subject: Tkinter
Message-ID: <1188882720.020666.67490@k79g2000hse.googlegroups.com>

i tried to use python gui module Tkinter in solaris,aix,hpux.....
while importing the module it  shows an error...

import Tkinter
error says that your python may not be configured for Tk()...
how to get out of this...



From raychorn at hotmail.com  Fri Sep 21 19:25:20 2007
From: raychorn at hotmail.com (Python Maniac)
Date: Fri, 21 Sep 2007 16:25:20 -0700
Subject: I could use some help making this Python code run faster using
	only Python code.
In-Reply-To: <mailman.897.1190412168.2658.python-list@python.org>
References: <1190325588.608625.259800@q3g2000prf.googlegroups.com>
	<1190328413.226577.206740@k79g2000hse.googlegroups.com>
	<1190330015.131971.265680@y42g2000hsy.googlegroups.com>
	<1190357165.381313.197910@19g2000hsx.googlegroups.com>
	<Xns99B25B0334892duncanbooth@127.0.0.1>
	<1190394011.148384.106280@q3g2000prf.googlegroups.com>
	<mailman.897.1190412168.2658.python-list@python.org>
Message-ID: <1190417120.723579.267560@22g2000hsm.googlegroups.com>

On Sep 21, 3:02 pm, "Matt McCredie" <mccre... at gmail.com> wrote:
> > Now I think I will code this little scrambler using nothing but the D
> > Language just to see whether there is any benefit in using D over
> > Python for this sort of problem.
>
> Isn't D compiled to machine code? I would expect it to win hands down.
> That is, unless it is horribly unoptimized.
>
> Matt

Well D code is compiled into machine code that runs via a VM.

My initial D code ran in about 6 secs as compare with the 2.278 secs
for the optimized Python code.

If I want the D code to run faster than the optimized Python I would
have to use the same Pythonic optimizations as were used in Python
when crafting the D code and then I would guess the optimized D code
might run only 2x faster than the optimized Python code.

In real terms < 3 secs to process a 20 MB file is more than reasonable
performance with no need to perform any additional optimizations.

For this particular problem Python performs as well as the D powered
machine code using far less effort, for me, than what it would take to
make the D code run faster than the Python code.

All this tells me the following:

* List Comprehensions are very powerful for Python.
* String translation is a must when processing string based data in an
iterative manner.
* Ruby has no hope of being able to beat Python for this type of
problem given the proper Python optimizations are used.
* There is no value in wasting time with lower-level languages to make
Python run faster for this type of problem.

It would be nice if Python could be made to automatically detect the
LC and string translation patterns used by the unoptimized Python code
and make them into optimized Python code on the fly at runtime.  I am
more than a little amazed nobody has chosen to build a JIT (Just In-
Time compiler) or cached-compiler into Python but maybe that sort of
thing is just not needed given the fact that Python code can be easily
optimized to run 30x faster.



From ldo at geek-central.gen.new_zealand  Sat Sep  1 02:55:52 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 01 Sep 2007 18:55:52 +1200
Subject: simple spider in python
References: <1187876014.845912.236690@e9g2000prf.googlegroups.com>
	<mailman.202.1187902138.32294.python-list@python.org>
Message-ID: <fbb293$hfv$1@lust.ihug.co.nz>

In message <mailman.202.1187902138.32294.python-list at python.org>, Michael
Bentley wrote:

> First thing to know is that google doesn't like the User-agent header
> urllib2 uses by default -- you'll have to masquerade as a browser
> (google throws a 403 error if you connect as 'User-Agent: Python-
> urllib/2.5': look into urllib2.build_opener()).

A bit small-minded of Google, don't you think. They also block the default
user-agent header for wget.


From grante at visi.com  Wed Sep 26 19:15:17 2007
From: grante at visi.com (Grant Edwards)
Date: Wed, 26 Sep 2007 23:15:17 -0000
Subject: ~ bit-wise unary operator
References: <mailman.1138.1190844872.2658.python-list@python.org>
Message-ID: <13flq05hoiq5he4@corp.supernews.com>

On 2007-09-26, Ladislav Andel <ladaan at iptel.org> wrote:
> Hello,
> why ~ bit-wise unary operator returns -(x+1) and not bit inversion of 
> the given integer?
>
> example:
> a = 7978
> a = ~a
> python returns -7979
>
> but I need to get back 57557 as in C language.

It's not what C language returns, but if you want 57557, you
can get it like this:

>>> (~7978) & 0xffff
57557

-- 
Grant Edwards                   grante             Yow! Do you think the
                                  at               "Monkees" should get gas on
                               visi.com            odd or even days?


From gagsl-py2 at yahoo.com.ar  Fri Sep 28 04:04:21 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 28 Sep 2007 05:04:21 -0300
Subject: marshal bug?
References: <1190961020.258850.215130@g4g2000hsf.googlegroups.com>
	<mailman.1209.1190963523.2658.python-list@python.org>
	<1190964399.196877.299630@19g2000hsx.googlegroups.com>
Message-ID: <op.tzct1jgux6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 28 Sep 2007 04:26:39 -0300, Anurag <anuraguniyal at gmail.com>  
escribi?:

> Now is there a easy way to by pass it (hack around it)
> I tried various options but all fail e.g.
> i= 123; marshal.dumps("%d"%123) != marshal.dumps("%d"%i)

You can't. Don't use marshal to compare objects. You appear to assume that  
two objects that compare equal, should have the same marshalled  
representation, and that is simply not true.

py> [1, 2.0, 3+0j, "4"] == [1.0, 2+0j, 3, u"4"]
True

> So maybe I have to change all my code to use pickle, which also
> consumes for memory per string.

Neither marshal nor pickle guarantee that equal objects have equal  
representations, so in this regard pickle won't help either.
Maybe if you explain what you really want to do someone could suggest a  
solution.

-- 
Gabriel Genellina



From rustompmody at gmail.com  Sat Sep 15 07:02:48 2007
From: rustompmody at gmail.com (Rustom Mody)
Date: Sat, 15 Sep 2007 16:32:48 +0530
Subject: trim start and trailing space chars from string
In-Reply-To: <46EBA4B1.1030302@yahoo.gr>
References: <46EBA4B1.1030302@yahoo.gr>
Message-ID: <f46c52560709150402k4a4bfb2alde6be7beda2da421@mail.gmail.com>

>>> s="     abcdef     "
>>> s.strip()
'abcdef'
>>> s.rstrip()
'     abcdef'
>>> s.lstrip()
'abcdef     '
>>>


On 9/15/07, Konstantinos Pachopoulos <kostaspaxos at yahoo.gr> wrote:
> Hi,
> is there something corresponding to the java String.trim() method, ie
> trim start and trailing space/tab chars from string?
> say convert " asdf   "  to "asdf"?
>
> Thnx
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From kyosohma at gmail.com  Tue Sep  4 16:35:38 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Tue, 04 Sep 2007 20:35:38 -0000
Subject: function call
In-Reply-To: <1188937059.459609.61850@57g2000hsv.googlegroups.com>
References: <1188937059.459609.61850@57g2000hsv.googlegroups.com>
Message-ID: <1188938138.583012.22570@22g2000hsm.googlegroups.com>

On Sep 4, 3:17 pm, ianar? <ian... at gmail.com> wrote:
> Hey all,
>
> Is there a way of printing out how a function was called? In other
> words if I do the following:
>
> def someFunction(self):
>     self.someOtherFunction(var1, var2)
>
> I would get something like "someOtherFunction: called by:
> someFunction, args are: var1, var2"
>
> Thanks in advance
>
> - ianar?

I think you can use __name__, but I'm not sure how to apply it here.
Read up on Python's introspection tools:

http://www.ibm.com/developerworks/library/l-pyint.html

Mike



From jeff at jmcneil.net  Thu Sep 27 15:55:52 2007
From: jeff at jmcneil.net (Jeff McNeil)
Date: Thu, 27 Sep 2007 15:55:52 -0400
Subject: How to Catch Errors in SimpleXMLRPCServer
In-Reply-To: <1190921745.575519.53560@y42g2000hsy.googlegroups.com>
References: <1190921745.575519.53560@y42g2000hsy.googlegroups.com>
Message-ID: <82d28c40709271255s1039e861xf9abbc80e1b56b09@mail.gmail.com>

Instead of register_function, use register_instance and provide a
_dispatch method in that instance that handles your exception logging.

Pseudo:

class MyCalls(object):
    def _dispatch(self, method, args):
        try:
            self.getattr(self, method)(*args)
        except:
            handle_logging()

server = SimpleXMLRPCServer(("localhost", 8000))
server.register_instance(MyCalls())
server.serve_forever()

There might be an easier way... but this works for me.

-Jeff

On 9/27/07, gregpinero at gmail.com <gregpinero at gmail.com> wrote:
> I have a pretty simple XMLRPCServer, something along the lines of the
> example:
>
> server = SimpleXMLRPCServer(("localhost", 8000))
> server.register_function(pow)
> server.register_function(lambda x,y: x+y, 'add')
> server.serve_forever()
>
> Now what I want to do is catch any errors that happen on requests, and
> ideally have them emailed to me.  I have the email part all taken care
> of, I just need to know how to get at the exceptions.
>
> Thanks in advance for any help,
>
> Greg
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From danb_83 at yahoo.com  Mon Sep 17 01:23:07 2007
From: danb_83 at yahoo.com (Dan Bishop)
Date: Sun, 16 Sep 2007 22:23:07 -0700
Subject: A short question about non-ascii characters in list
In-Reply-To: <mailman.636.1190005732.2658.python-list@python.org>
References: <mailman.636.1190005732.2658.python-list@python.org>
Message-ID: <1190006587.185218.168340@22g2000hsm.googlegroups.com>

On Sep 17, 12:08 am, js <ebgs... at gmail.com> wrote:
> >>> print u"???"
> ???
> >>> print [u"???"]
>
> [u'\xe4\xf6\xfc']
>
> Python seems to treat non-ASCII chars in a list differently from the
> one in the outside of a list.
> I think this behavior is so inconvenient and actually makes debugging
> work harder.
>
> Is this an intentional? Is there any doc discussing about this?

It's intentional.  __str__ of a list uses the __repr__ of its
elements.  This helps reduce confusion (e.g., between ['a', 'b, c']
and ['a, b', 'c']).



From lasses_weil at klapptsowieso.net  Thu Sep 13 12:51:51 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Thu, 13 Sep 2007 18:51:51 +0200
Subject: Python 3K or Python 2.9?
In-Reply-To: <1189700775.661780.292150@50g2000hsm.googlegroups.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<87sl5j5r34.fsf@benfinney.id.au>
	<1189646281.569796.267940@d55g2000hsg.googlegroups.com>
	<87ir6f5mrq.fsf@benfinney.id.au>
	<1189651204.408268.57580@19g2000hsx.googlegroups.com>
	<1i4dddf.piaojwz9lz40N%aleax@mac.com>
	<1189700775.661780.292150@50g2000hsm.googlegroups.com>
Message-ID: <46e96aaa$0$7685$9b4e6d93@newsspool2.arcor-online.net>

TheFlyingDutchman wrote:
> What I would like to have seen added to class definitions was the
> forced declaration of all object variables in the class outside of
> methods. I don't like the fact that they have to be, and can be
> created in any method on the fly.
> 
Isn't one of the main ideas behind python that it doesn't force you to 
do (well, declare) anything? And by "ideas" I mean "design decisions".
Thats exactly what makes python great for prototyping; you just do it 
and see if it works. As soon as you need to declare things you have to 
change stuff in at least 2 places for every change of heart you have.

(Can you tell I'm currently forced to developing in Java? ;) (Which I'm 
currently avoiding to do, by wasting my time on usenet.))

/W


From dotancohen at gmail.com  Sun Sep  9 15:01:11 2007
From: dotancohen at gmail.com (Dotan Cohen)
Date: Sun, 9 Sep 2007 22:01:11 +0300
Subject: Modul (%) in python not like in C?
Message-ID: <880dece00709091201n449d4c2k31998a5d426de17d@mail.gmail.com>

FIrst of all, how is the % symbol (as in 70%6=4) called in English?

Second, in Turbo C -111%10=-1 however in python -111%10=9. Is one or
the other in error? Is this a known gotcha? I tried to google the
subject however one cannot google the symbol %. Thanks in advance.

Dotan Cohen

http://what-is-what.com
http://gibberish.co.il

--

?-?-?-?-?-?-?-?-?
?-?-?-?-?-?-?-?-?
?-?-?-?-?-?-?-?-?

A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?

From dnhkng at googlemail.com  Wed Sep  5 05:50:38 2007
From: dnhkng at googlemail.com (Dr Mephesto)
Date: Wed, 05 Sep 2007 09:50:38 -0000
Subject: creating really big lists
Message-ID: <1188985838.661821.41530@k79g2000hse.googlegroups.com>

Hi!

I would like to create a pretty big list of lists; a list 3,000,000
long, each entry containing 5 empty lists. My application will append
data each of the 5 sublists, so they will be of varying lengths (so no
arrays!).

Does anyone know the most efficient way to do this? I have tried:

list = [[[],[],[],[],[]] for _ in xrange(3000000)]

but its not soooo fast. Is there a way to do this without looping?

David.



From steve at REMOVE-THIS-cybersource.com.au  Thu Sep  6 06:54:18 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Thu, 06 Sep 2007 10:54:18 -0000
Subject: interesting puzzle......try this you will be rewarded...
References: <1189072576.997085.32360@r29g2000hsg.googlegroups.com>
Message-ID: <13dvn2q9qogq484@corp.supernews.com>

On Thu, 06 Sep 2007 09:56:16 +0000, Renu wrote:

> Hi,
> 
> Just click on this link n use ur common sence to navigate.
> 
> It has 23 pages one after the other, starting from this first
> Page. The trick is to find a way to go to the next page.

[snip]

In case it wasn't obvious, the site is nothing but adware. Banner ads, 
google ads, text ads, blah blah blah. I stopped at page 1.


-- 
Steven.





From bdesth.quelquechose at free.quelquepart.fr  Wed Sep 19 15:02:32 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 19 Sep 2007 21:02:32 +0200
Subject: ONYX
In-Reply-To: <1190211769.268351.79500@d55g2000hsg.googlegroups.com>
References: <1190211769.268351.79500@d55g2000hsg.googlegroups.com>
Message-ID: <46f1726f$0$15276$426a74cc@news.free.fr>

korovev76 at gmail.com a ?crit :
> Hi everybody! Is there anything out there that can validate and parse
> some "onyx-style" xml?

I don't know what's "onyx-style" xml, but if it's xml, any xml parser 
will parse it, and any validating parser should be able to validate it 
given the correct DTD.


From mail2spj at yahoo.com  Mon Sep 17 17:00:13 2007
From: mail2spj at yahoo.com (SPJ)
Date: Mon, 17 Sep 2007 14:00:13 -0700 (PDT)
Subject: Writing to multiple excel worksheets
Message-ID: <969892.43175.qm@web50103.mail.re2.yahoo.com>

Hi,

I have a list which I need to write to excel worksheet. The list is like:
data = ['IP1','21','ftp','\n','IP1','22','ssh','\n','IP2','22','ssh','\n','IP2','23','telnet','\n']
Now the task is to create a workbook with tabbed sheet for each of the service's in the list i.e. tabs for ftp, ssh, telnet etc. The data needs to be written in the corresponding sheets. 

What is the best way to achieve this?
I couldn't find much help on the internet nor in the earlier threads. Please help.

Thanks,
SPJ

       
---------------------------------
Yahoo! oneSearch: Finally,  mobile search that gives answers, not web links. 
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From hall.jeff at gmail.com  Sat Sep 29 11:22:27 2007
From: hall.jeff at gmail.com (hall.jeff at gmail.com)
Date: Sat, 29 Sep 2007 15:22:27 -0000
Subject: Program inefficiency?
Message-ID: <1191079347.192272.240540@22g2000hsm.googlegroups.com>

I wrote the following simple program to loop through our help files
and fix some errors (in case you can't see the subtle RE search that's
happening, we're replacing spaces in bookmarks with _'s)

the program works great except for one thing. It's significantly
slower through the later files in the search then through the early
ones... Before anyone criticizes, I recognize that that middle section
could be simplified with a for loop... I just haven't cleaned it
up...

The problem is that the first 300 files take about 10-15 seconds and
the last 300 take about 2 minutes... If we do more than about 1500
files in one run, it just hangs up and never finishes...

Is there a solution here that I'm missing? What am I doing that is so
inefficient?

# File: masseditor.py

import re
import os
import time

def massreplace():
    editfile = open("pathname\editfile.txt")
    filestring = editfile.read()
    filelist = filestring.splitlines()
##    errorcheck = re.compile('(a name=)+(.*)(-)+(.*)(></a>)+')
    for i in range(len(filelist)):
        source = open(filelist[i])
        starttext = source.read()
        interimtext = replacecycle(starttext)
        interimtext = replacecycle(interimtext)
        interimtext = replacecycle(interimtext)
        interimtext = replacecycle(interimtext)
        interimtext = replacecycle(interimtext)
        interimtext = replacecycle(interimtext)
        interimtext = replacecycle(interimtext)
        interimtext = replacecycle(interimtext)
        interimtext = replacecycle(interimtext)
        interimtext = replacecycle(interimtext)
        interimtext = replacecycle(interimtext)
        interimtext = replacecycle(interimtext)
        finaltext = replacecycle(interimtext)
        source.close()
        source = open(filelist[i],"w")
        source.write(finaltext)
        source.close()
##        if errorcheck.findall(finaltext)!=[]:
##            print errorcheck.findall(finaltext)
##            print filelist[i]
        if i == 100:
            print "done 100"
            print time.clock()
        elif i == 300:
            print "done 300"
            print time.clock()
        elif i == 600:
            print "done 600"
            print time.clock()
        elif i == 1000:
            print "done 1000"
            print time.clock()
    print "done"
    print i
    print time.clock()

def replacecycle(starttext):
    p1= re.compile('(href=|HREF=)+(.*)(#)+(.*)( )+(.*)(">)+')
    p2= re.compile('(name=")+(.*)( )+(.*)(">)+')
    p3= re.compile('(href=|HREF=)+(.*)(#)+(.*)(\')+(.*)(">)+')
    p4= re.compile('(name=")+(.*)(\')+(.*)(">)+')
    p5= re.compile('(href=|HREF=)+(.*)(#)+(.*)(-)+(.*)(">)+')
    p6= re.compile('(name=")+(.*)(-)+(.*)(">)+')
    p7= re.compile('(href=|HREF=)+(.*)(#)+(.*)(<)+(.*)(">)+')
    p8= re.compile('(name=")+(.*)(<)+(.*)(">)+')
    p7= re.compile('(href=|HREF=")+(.*)(#)+(.*)(:)+(.*)(">)+')
    p8= re.compile('(name=")+(.*)(:)+(.*)(">)+')
    p9= re.compile('(href=|HREF=")+(.*)(#)+(.*)(\?)+(.*)(">)+')
    p10= re.compile('(name=")+(.*)(\?)+(.*)(">)+')
    p100= re.compile('(a name=)+(.*)(-)+(.*)(></a>)+')
    q1= r"\1\2\3\4_\6\7"
    q2= r"\1\2_\4\5"
    interimtext = p1.sub(q1, starttext)
    interimtext = p2.sub(q2, interimtext)
    interimtext = p3.sub(q1, interimtext)
    interimtext = p4.sub(q2, interimtext)
    interimtext = p5.sub(q1, interimtext)
    interimtext = p6.sub(q2, interimtext)
    interimtext = p7.sub(q1, interimtext)
    interimtext = p8.sub(q2, interimtext)
    interimtext = p9.sub(q1, interimtext)
    interimtext = p10.sub(q2, interimtext)
    interimtext = p100.sub(q2, interimtext)

    return interimtext

massreplace()



From bignose+hates-spam at benfinney.id.au  Wed Sep 19 22:55:35 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 20 Sep 2007 12:55:35 +1000
Subject: Mixin classes and single/multiple inheritance (was: super() doesn't
	get superclass)
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au>
	<46f0fba0$0$29605$426a34cc@news.free.fr>
	<1190199134.791808.267110@22g2000hsm.googlegroups.com>
	<mailman.778.1190225664.2658.python-list@python.org>
	<1190256493.827576.139470@r29g2000hsg.googlegroups.com>
Message-ID: <877immvye0.fsf_-_@benfinney.id.au>

Michele Simionato <michele.simionato at gmail.com> writes:

> I am not against mixins (even if I am certainly very much against
> the *abuse* of mixins, such as in Zope 2). What I would advocate
> (but I realize that it will never happen in Python) is single
> inheritance + mixins a la Ruby.

For those unfamiliar with Ruby, could you explain how you see this
being done in Python?

What do you see as an appropriate use of mixin classes, and what an
abuse?

What would the semantics be in Python for "single inheritance + mixins
a la Ruby"? Can you give example syntax?

-- 
 \     "As we enjoy great advantages from the inventions of others, we |
  `\     should be glad to serve others by any invention of ours."  -- |
_o__)                                                Benjamin Franklin |
Ben Finney


From sergio.correia at gmail.com  Sat Sep  8 13:53:49 2007
From: sergio.correia at gmail.com (Sergio Correia)
Date: Sat, 8 Sep 2007 12:53:49 -0500
Subject: Why 'class spam(object)' instead of class spam(Object)' ?
In-Reply-To: <fbs1id$acq$1@sea.gmane.org>
References: <mailman.205.1189146609.2658.python-list@python.org>
	<46e10916$0$16518$4c368faf@roadrunner.com>
	<fbs1id$acq$1@sea.gmane.org>
Message-ID: <f1aa6d810709081053j35a67243u4afaa88b4fd36227@mail.gmail.com>

Thanks for the replies, very instructive!

On 9/7/07, Steve Holden <steve at holdenweb.com> wrote:
> Carl Banks wrote:
> > On Fri, 07 Sep 2007 01:30:00 -0500, Sergio Correia wrote:
> >> Hi, I'm kinda new to Python (that means, I'm a total noob here), but
> >> have one doubt which is more about consistency that anything else.
> >>
> >> Why if PEP 8 says that "Almost without exception, class names use the
> >> CapWords convention", does the most basic class, object, is lowercase?
> >
> > It said "almost".  :)
> >
> Indeed it did, and never forget that most of PEP 8 was derived from an
> essay by Guido whose original title was "A Foolish Consistency is the
> Hobgoblin of Little Minds" ...
> >
> >> I found a thread about this:
> >> http://mail.python.org/pipermail/python-list/2007-April/437365.html
> >> where its stated that -object- is actually a type, not a class; but the
> >> idea still doesn't convince me.
> >
> You don't have to be convinced. You just have to do what the PEP says
> yourself and ignore the people who *haven't* done what it says
> (particularly if they are core Python developers).
>
> > There's a false dichotomy there: it's not an either-or situation.  Almost
> > everyone would agree that new-style classes, defined by the Python class
> > statement, are both classes and types.  Some might squabble over whether
> > object is class, but it has nothing to do with why object is spelled in
> > lower-case.
> >
> > The reason why "object" is lower case is because built-in types are
> > spelled in lower-case.  Why are built-in types lower case?  Because many
> > built-in types were originially functions.  For example, "int" and "str"
> > were once functions.  When these symbols became the names of their
> > respective types, they kept the lower-case spelling, and it became
> > convention for built-in types to be spelled lower-case.
> >
> In other words: "Get over it" ;-)
>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd           http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
> --------------- Asciimercial ------------------
> Get on the web: Blog, lens and tag the Internet
> Many services currently offer free registration
> ----------- Thank You for Reading -------------
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From laurent.pointal at limsi.fr  Mon Sep 17 07:33:28 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Mon, 17 Sep 2007 13:33:28 +0200
Subject: Python "with"
In-Reply-To: <fclikb$blt$1@news2.carnet.hr>
References: <fck2di$7to$1@ss408.t-com.hr> <fcleos$2rt$1@news2.u-psud.fr>
	<fclikb$blt$1@news2.carnet.hr>
Message-ID: <fclom8$8h6$1@news2.u-psud.fr>

Ivan Voras a ?crit :
> Laurent Pointal wrote:
> 
>> The ugly part is the 'tmp' name, try to choose a name with a proper 
>> meaning about what it is really, and it become clean and readable:
>>
>> filerefs = some.big.structure.or.nested.object.with.file.references
>> filerefs.encoding = "utf-8"
>> filerefs.name = "MyFileName.txt"
>> filerefs.use_quotes = True
>>
>> Isn't it ?
> 
> Well, no, but this might be due to personal tastes. At least, I don't 
> think it's better then some other alternatives. For example, in C99 you 
> can do:
> 
> static struct option_s foo_option = {
>     .name = "foo",
>     .type = O_STRING,
>     .def_value = "default"
> };
> 
> At least to me, this looks even better than the Pascal's syntax.

If its at construction time, you can do the same with Python:

class option_s(object) :
     def __init__(self,**initializers) :
         self.__dict__.update(initializers)

foo_option = option_s(
     name = "foo",
     type_ = O_STRING,
     def_value = "default"
     )


And if the class has no such construction idiom, you can play like this:

x = X()
x.__dict__.update(dict(
     name = "foo",
     type_ = O_STRING,
     def_value = "default"
))


Note: this directly manipulate objects attributes - some times its 
preffered to use ad-hoc methods.

Note2: I prefer the "namespace.name = value" solution, more readable.

Note3: Its funny to see how Python users tries to change the language, 
does this occure with C, C++, Java, C# ?



From tdelaney at avaya.com  Wed Sep 26 05:42:10 2007
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Wed, 26 Sep 2007 17:42:10 +0800
Subject: sorting a list numbers stored as strings
In-Reply-To: <877imeoo5i.fsf@mulj.homelinux.net>
Message-ID: <E4C7BCAB1872014F81CEAACD25699B8C0849BB@301081ANEX2.global.avaya.com>

Hrvoje Niksic wrote:

> "Delaney, Timothy (Tim)" <tdelaney at avaya.com> writes:
> 
>> Yep - appears I must have been misremembering from another language
>> (dunno which)
> 
> <cough>Tcl</cough>

Not bloody likely - only used Tcl for expect, and then only very
minimally. I'm sure there's at least one language though among the 20+
I've forgotten over the years that has significant leading zeroes in its
default string->int parsing.

Actually, I think Java does ...

Tim Delaney


From jstroud at mbi.ucla.edu  Sat Sep  8 01:00:26 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 07 Sep 2007 22:00:26 -0700
Subject: pdb question - spew out "steps" until crash needed
Message-ID: <fbta9a$b2p$1@daisy.noc.ucla.edu>

How do I get pdb to just run my program and spew out what's happening 
until it crashes/freezes? (This is a malloc error in a library somewhere 
and I can't figure out where--no exceptions thrown, etc.)

I think I might need to live a lot longer to simply hit 's' [enter] 
until I get to the crash. Easiest would be run->spew->read last line.

James

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

http://www.jamesstroud.com/


From grante at visi.com  Wed Sep 12 10:28:59 2007
From: grante at visi.com (Grant Edwards)
Date: Wed, 12 Sep 2007 14:28:59 -0000
Subject: library to launch program in linux
References: <1189103678.484278.321650@r34g2000hsd.googlegroups.com>
	<13e0itfgm0ida1c@corp.supernews.com>
	<1189604878.304602.104410@k79g2000hse.googlegroups.com>
Message-ID: <13efttb3b3q40a@corp.supernews.com>

On 2007-09-12, idzwan.nizam at gmail.com <idzwan.nizam at gmail.com> wrote:

>>> I'm a new user. What library should I use so that I canlaunch
>>> programin linux using python? Thank you in advance.

> can you please show me the sample code using subprocess library.

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

> I would like user to have few option, program they could run.
> say, firefox and x chat.

I'd like to be 15 years younger.

-- 
Grant Edwards                   grante             Yow! I'm definitely not
                                  at               in Omaha!
                               visi.com            


From hanser at club-internet.fr  Sat Sep  1 11:19:49 2007
From: hanser at club-internet.fr (Pierre Hanser)
Date: Sat, 01 Sep 2007 17:19:49 +0200
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <46d903db$0$19580$4c368faf@roadrunner.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<1188523589.736146.263510@l22g2000prc.googlegroups.com>
	<1i3o9kr.2gmni61g62moaN%aleax@mac.com>
	<7xwsvcc9yz.fsf@ruckus.brouhaha.com>
	<1i3p8lm.19738kn1q0gkouN%aleax@mac.com>
	<1188587846.687895.69240@q5g2000prf.googlegroups.com>
	<38rmq4-cq.ln1@strongwill.g2ctech>
	<46d903db$0$19580$4c368faf@roadrunner.com>
Message-ID: <46D98315.4030602@club-internet.fr>

Carl Banks a ?crit :
> 
> This is starting to sound silly, people.  Critical is a relative term, 
> and one project's critical may be anothers mundane.  Sure a flaw in your 
> flagship product is a critical problem *for your company*, but are you 
> really trying to say that the criticalness of a bad web search is even 
> comparable to the most important systems on airplanes, nuclear reactors, 
> dams, and so on?  Come on.

20 years ago, there was *no* computer at all in nuclear reactors.


From f.guerrieri at gmail.com  Wed Sep  5 16:47:20 2007
From: f.guerrieri at gmail.com (Francesco Guerrieri)
Date: Wed, 5 Sep 2007 22:47:20 +0200
Subject: concise code (beginner)
In-Reply-To: <fbn42h$k37$1@daisy.noc.ucla.edu>
References: <13dsvqrqivtf092@corp.supernews.com>
	<fbmrsg$dsi$1@daisy.noc.ucla.edu>
	<1189020188.842700.50950@d55g2000hsg.googlegroups.com>
	<fbn42h$k37$1@daisy.noc.ucla.edu>
Message-ID: <79b79e730709051347t260ae465v4c455bc66372863f@mail.gmail.com>

On 9/5/07, James Stroud <jstroud at mbi.ucla.edu> wrote:
>
>
> Another way is to make a copy of devs, if devs is short, which makes my
>
>

When I process something of that genre (e.g. files) I prefer not to lose
trace of what's happened by removing the "bad items". Instead I prefer to
flag  or otherwise to store them in some place from where they could get
back. Obviously, it depends on the details of the program :)

francesco
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From ricaraoz at gmail.com  Sun Sep  2 11:19:33 2007
From: ricaraoz at gmail.com (=?UTF-8?B?UmljYXJkbyBBcsOhb3o=?=)
Date: Sun, 02 Sep 2007 12:19:33 -0300
Subject: localizing a sort
In-Reply-To: <fbdv47$jcm$03$1@news.t-online.com>
References: <mailman.283.1188683800.28954.python-list@python.org>
	<fbdv47$jcm$03$1@news.t-online.com>
Message-ID: <46DAD485.405@bigfoot.com>

Peter Otten wrote:
> Am Sat, 01 Sep 2007 18:56:38 -0300 schrieb Ricardo Ar?oz:
> 
>> Hi, I've been working on sorting out some words.
>>
>> My locale is :
>>>>> import locale
>>>>> locale.getdefaultlocale()
>> ('es_AR', 'cp1252')
>>
>> I do :
>>>>> a = '???????????????'
>>>>> print ''.join(sorted(a, cmp=lambda x,y: locale.strcoll(x,y)))
>> aeiou???????????????
> 
> The lambda is superfluous. Just write cmp=locale.strcoll instead.

No it is not :
>>> print ''.join(sorted(a, cmp=locale.strcoll(x,y)))
Traceback (most recent call last):
  File "<input>", line 1, in <module>
TypeError: strcoll expected 2 arguments, got 0

You need the lambda to assign both arguments.

>  
>> This is not what I am expecting. I was expecting :
>> a???e???i???.....etc.
>>
>> The reason is that if you want to order some words (say for a dictionary
>> (paper dict, where you look up words)) this is what happens :
>>>>> a = 'pal?bra de p?labra de pblabra'
>>>>> print ' '.join(sorted(a.split(), cmp=lambda x,y: locale.strcoll(x, y)))
>> de de pal?bra pblabra p?labra
>>
>> While any human being would expect :
>>
>> de de pal?bra p?labra pblabra
>>
>> Does anybody know a way in which I could get the desired output?
> 
> I suppose it would work on your machine if you set the locale first with
> 
>>>> locale.setlocale(locale.LC_ALL, "")

This works. Thanks Peter.



From remm1 at member.fsf.org  Sat Sep 15 23:05:09 2007
From: remm1 at member.fsf.org (Rob E)
Date: Sat, 15 Sep 2007 22:05:09 -0500
Subject: List append
References: <1189826727.204061.310380@d55g2000hsg.googlegroups.com>
Message-ID: <pan.2007.09.16.03.05.07.420599@member.fsf.org>

On Sat, 15 Sep 2007 03:25:27 +0000, mouseit wrote:

> I'm trying to add an element to a list which is a property of an
> object, stored in an array. When I append to one element, all of the
> lists are appended!
> 
> Example Code:
> 
> class Test:
>     array = []
> 
> myTests = [Test() , Test() , Test()]
> print len(myTests[1].array)
> myTests[0].array.append( 5 )
> print len(myTests[1].array)
> 
> prints:
> 0
> 1
> 
> This is probably a really easy question (I'm very new to python), so
> thanks in advance for your help!

Yes, that's easy:

class myclass:
   var1 = []

means that var1 is associated with the class.  If you want an attribute:

class myclass:
    def __init__ (self):
        self.var1 = []

is the correct way.

Rob



From p at ulmcnett.com  Mon Sep 24 13:33:22 2007
From: p at ulmcnett.com (Paul McNett)
Date: Mon, 24 Sep 2007 10:33:22 -0700
Subject: Is there some sort of portable IDE?
In-Reply-To: <eb79828c0709241026q3587ae8ag56ad41b510d4e994@mail.gmail.com>
References: <eb79828c0709241026q3587ae8ag56ad41b510d4e994@mail.gmail.com>
Message-ID: <46F7F4E2.4070707@ulmcnett.com>

Lamonte Harris wrote:
> Like say you don't got python installed, but you want to test code is 
> there a way?(School)

Like way, dude, check this out:
http://www.portablepython.com/



-- 
pkm ~ http://paulmcnett.com


From trekker182 at gmail.com  Fri Sep 21 11:36:06 2007
From: trekker182 at gmail.com (Shawn Minisall)
Date: Fri, 21 Sep 2007 11:36:06 -0400
Subject: acronym program
In-Reply-To: <87lkb0hxgu.fsf@rudin.co.uk>
References: <mailman.871.1190386285.2658.python-list@python.org>
	<87lkb0hxgu.fsf@rudin.co.uk>
Message-ID: <46F3E4E6.7050207@gmail.com>

That was it!  Thanks a lot!

I was also trying to output the acronym in caps so I was entering 
string.upper (acronym) like whats in the book and kept getting a 
"'tuple' object is not callable" error message.  Just for the heck of it 
I tried it acronym.upper() and it worked!  I thought it could work both 
ways?



Paul Rudin wrote:
> Shawn Minisall <trekker182 at gmail.com> writes:
>
>   
>> I'm trying to write a program that gets the first letter of every word
>> of a phrase and prints it on screen.  I'm having problems with it.
>> I'm thinking a for loop would be good since I don't know the exact
>> number of words the user is going to enter, but after that I get
>> confused.  How do I tell python to just goto the beg of each word in
>> the phrase and include it in the acronym?  Am I on the right track?
>>
>>    for a in string.split(phrase)
>>    acronym = phrase [0]
>>    acronym = acronym + 1
>>     
>
>
> How about:
>
> for a in phrase.split():
>     print a[0]
>
>
>
>   



From kar1107 at gmail.com  Wed Sep 19 16:29:22 2007
From: kar1107 at gmail.com (Karthik Gurusamy)
Date: Wed, 19 Sep 2007 20:29:22 -0000
Subject: Removing objects in a list via a wild card
In-Reply-To: <mailman.782.1190232672.2658.python-list@python.org>
References: <8a6b8e350709191151n31b72bbvc3090031232d5fc8@mail.gmail.com>
	<mailman.782.1190232672.2658.python-list@python.org>
Message-ID: <1190233762.051021.307250@k35g2000prh.googlegroups.com>

On Sep 19, 1:11 pm, David <wizza... at gmail.com> wrote:
> On 9/19/07, James Matthews <nytrok... at gmail.com> wrote:
>
> > Hi List
>
> > I have a list of files from my current directory:
>
> > import os
>
> > files = os.listdir(os.getcwd())
>
> > Now this list also includes some files that i don't want like my python
> > files... How would i remove them
>
> You can use regular expressions:
>
> import re
> files=[file for file in os.listdir(os.getcwd()) if not
> re.match('^.+\.((py)|(pyc))$', file)]
>
> You can also use fnmatch:
>
> from fnmatch import fnmatch
> files = [file for file in os.listdir(os.getcwd()) if not fnmatch(file,
> '*.py') and not fnmatch(file, '*.pyc')]

Another option is to use glob.

import glob

p1 = glob.glob('*.py')
p2 = glob.glob('*.pyc')
all = glob.glob('*')              # won't include '.', '..'

non_py = set(all) - set(p1) - set(p2)

Karthik



From steve at REMOVE-THIS-cybersource.com.au  Sun Sep  2 18:05:44 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sun, 02 Sep 2007 22:05:44 -0000
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
	<1188735642.391419.103650@19g2000hsx.googlegroups.com>
	<1188740716.423349.304370@y42g2000hsy.googlegroups.com>
	<1188743299.664137.194760@d55g2000hsg.googlegroups.com>
	<46daeaec$0$19889$426a74cc@news.free.fr> <46DB04DD.80801@v.loewis.de>
	<46db085d$0$16113$9b4e6d93@newsspool1.arcor-online.net>
Message-ID: <13dmctogeh19410@corp.supernews.com>

On Sun, 02 Sep 2007 21:00:45 +0200, Wildemar Wildenburger wrote:

> Martin v. L?wis wrote:
>>>> (2) it is a interpretation language
>>> Not quite. It's compiled to byte-code - just like Java (would you call
>>> Java an 'interpreted language' ?)
>> 
>> Python is not implemented like Java. In Java (at least in HotSpot), the
>> byte code is further compiled to machine code before execution; in
>> Python, the byte code is interpreted.
>> 
> OK, good. Naive question now comming to mind: Why doesn't Python do the
> latter as well?
> 
> /W

There is no single version of Java, and the reference interpretation runs 
on a virtual machine just like Python. Today there are virtual machine 
implementations of Java, native compilers, and Just In Time compilers for 
Java, including HotSpot mentioned by Martin, but Java the language was 
originally defined to run on a VM.

See, for example, here: http://schmidt.devlib.org/java/compilers.html

There are costs to native compilation, the biggest one of course being 
the initial investment in time and effort in creating the native 
compiler. Sun and other commercial companies have invested a lot of money 
in Java, and I don't think the money invested in Python has come even 
close. Consequently, any work into JIT compilation for Java has been done 
by volunteers.

Nevertheless, we have Psyco, which is a JIT compiler of sorts; work also 
continues on PyPy (Python implemented in Python) which, it is hoped, will 
lead to faster Python implementations.

Part of the reason that native compilation for Python is hard is that 
Python's dynamic object model makes it very difficult to apply the same 
sorts of compiler optimizations that C and Java allow. Comparatively 
little of the work done by Python can be safely pushed from run time to 
compile time, so it is unlikely that the average Python application will 
ever run as fast as the equivalent C code -- although that ignores the 
question of what "the equivalent C code" could possibly mean. (If the C 
code includes all the dynamic high-level features of Python, it too would 
surely run as slowly as Python, and if it didn't, it can hardly be said 
to be equivalent.) Nevertheless, by using something like Psyco parts of 
your Python code can run at virtually the same speed as C.

A big question mark in my mind is Lisp, which according to aficionados is 
just as dynamic as Python, but has native compilers that generate code 
running as fast as highly optimized C. I'm not qualified to judge whether 
the lessons learnt from Lisp can be applied to Python, but in any case 
Lisp is an old, old language -- only Fortran is older. The amount of 
development effort and money put into Lisp dwarfs that put into Python by 
possibly a hundred or more.

So... if you'd like to see Python run as fast as C or Lisp, and you have 
a few tens of millions of dollars spare to invest in development, I think 
the Python Software Foundation would love to hear from you.



-- 
Steven.


From dsanchez at e2000.es  Thu Sep 27 07:26:39 2007
From: dsanchez at e2000.es (=?iso-8859-1?Q?David_S=E1nchez_Mart=EDn?=)
Date: Thu, 27 Sep 2007 13:26:39 +0200
Subject: mod_python preprocess/filter before proxy
Message-ID: <004301c800f9$45dcbcd0$0414a8c0@e2000.local>


Hi!

  I've seen the message below in this python list, that seems to be
unanswered.

  I'm trying to do the pretty same thing.

  There's a way to preprocess the request with a mod_python handler and then
proxying it with mod_proxy?

  Thank you very much in advance, and sorry for trying to revive such an old
message.

Cheers.


>
>whale whale at mycameo.com
>Tue Mar 25 05:49:42 CET 2003
>
>I use Apache2.0.44 and mod_python3.0.1.
>I add ProxyPass and PythonHandler directives in httpd.conf
>## httpd.conf
>ProxyPass  /test/  http://www.test.com
>ProxyPassReverse  /test/   http://www.test.com
><Location />
>    AddHandler python-program .htm .html
>    PythonHandler mptest
></Location>    
>
>
>And mptest.py:
>from mod_python import apache
>def handler(req):
>    req.write('Hello!!')
>    return apache.OK
>
>ex. My apache server is www.server.com.
>When I browsed the local server request(ex.
>http://www.server.com/1.html),
>I received 'Hello!!' response, the python handler worked well.
>But when I browse the proxy request(ex.
>http://www.server.com/test/1.html),
>the response I received is the original content of
>http://www.test.com/1.html, not 'Hello!!'.
>The proxy requests didn't seem to be processed by mod_python handler.
>How could I pre-process the proxy request before mod_proxy module?
>Thanks a lot!!
>



---
David Sanchez Martin
Administrador de Sistemas
dsanchez at e2000.es
GPG Key ID: 0x37E7AC1F

E2000 Nuevas Tecnolog?as
Tel : +34 902 19 61 77
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From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sat Sep 29 17:40:26 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sat, 29 Sep 2007 23:40:26 +0200
Subject: List search
References: <eafb6$46fd68a3$4275d90a$4234@FUSE.NET>
Message-ID: <5m7v2aFc35svU1@mid.individual.net>

Kevin Walzer wrote:

> I'm having a problem with searching a list. Here's my code:
> 
> mylist = ['x11', 'x11-wm', 'x11-system']
> 
> for line in mylist:
>     if 'x11' in line:
>         print line
> 
> This results in the following output:
> 
> x11
> x11-wm
> x11-system
> 
> I'm looking to return the list item that just has 'x11'.

Why do you want to have an item you already know?

If you just wanted to check *if* the string "x11" is in the list,
you'd use

if "x11" in mylist:

Regards,


Bj?rn

-- 
BOFH excuse #221:

The mainframe needs to rest.  It's getting old, you know.



From bdesth.quelquechose at free.quelquepart.fr  Sun Sep  9 08:26:08 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 09 Sep 2007 14:26:08 +0200
Subject: Python code-writing for the blind. Was (Re: newbie: stani's 
	pythoneditor if-else)
In-Reply-To: <mailman.395.1189531731.2658.python-list@python.org>
References: <mailman.395.1189531731.2658.python-list@python.org>
Message-ID: <46e6dc13$0$22499$426a34cc@news.free.fr>

Hamilton, William a ?crit :
>>From: madzientist
>>
>>Thanks, everybody, for the very very useful and kind responses.
>>
>>There is a second reason why I asked the question about automatic de-
>>indenting. I am teaching myself Python partly so I can then help my
>>technically astute, but blind friend learn programming. For the many
>>reasons that Pythonistas like to cite often, I thought Python would be
>>a good choice to learn programming, and that perhaps the indentation
>>problem would be solved by the use of an intelligent editor.
>>
>>But now I am not so sure, though I will try Emacs. Is there anyone
>>here with experience in such issues ? 

There has been recently a thread about the use of a preprocessor for 
blind Python programmers, you may want to have a look:
http://groups.google.fr/group/comp.lang.python/browse_thread/thread/80654a87bfa89e3b/de268f888d9cdf0e

(snip)
>>More seriously, the added issue is that SPE uses spaces, not a single
>>tab to indent the lines,

Most code editor let you configure this. wrt/ Python, just make sure you 
do not, never, mix tabs and spaces.

(snip)


From kyosohma at gmail.com  Thu Sep  6 13:29:19 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 06 Sep 2007 17:29:19 -0000
Subject: Finding specific date ranges
In-Reply-To: <mailman.161.1189094229.2658.python-list@python.org>
References: <1189090603.285778.282060@g4g2000hsf.googlegroups.com>
	<mailman.161.1189094229.2658.python-list@python.org>
Message-ID: <1189099759.833051.253020@y42g2000hsy.googlegroups.com>

On Sep 6, 10:57 am, Tim Golden <m... at timgolden.me.uk> wrote:
> kyoso... at gmail.com wrote:
> > Hi,
>
> > I am working on a timesheet application in which I need to to find the
> > first pay period in a month that is entirely contained in that month
> > to calculate vacation time. Below are some example date ranges:
>
> > December 31, 2006    January 13, 2007 # doesn't earn
> > January 14, 2007   January 27, 2007 # does earn
> > January 28, 2007   February 10, 2007 # doesn't
> > February 11, 2007  February 24, 2007 # does
>
> > So far, the best approach I've come up with is to create a list of
> > tuples that contain the pay period date ranges for the year and
> > iterate through the tuples looking for the first occurrence of the
> > month names matching. Then I'd add that date range to a separate list
> > and somehow ignore any other matches in that month. This seems like a
> > hack. Does anyone have a better idea?
>
> Well, I can come up with a solution which basically reflects the
> way I'd do it in SQL (since this kind of thing is my bread-and-butter
> there) but I'm not convinced it's really any better than your proposal.
> However, for the purposes of illustration:
>
> <code>
> import calendar
> import datetime
>
> YEAR = 2007
>
> months = [
>    (datetime.date (YEAR, n, 1), datetime.date (YEAR, n, calendar.monthrange (YEAR, n)[1]))
>    for n in range (1, 13)
> ]
>
> periods = [
>    (datetime.date(2006, 12, 31), datetime.date(2007, 1, 13)),
>    (datetime.date(2007, 1, 14), datetime.date(2007, 1, 27)),
>    (datetime.date(2007, 1, 28), datetime.date(2007, 2, 10)),
>    (datetime.date(2007, 2, 11), datetime.date(2007, 2, 24))
> ]
>
> for m in months:
>    candidate_periods = [p for p in periods if m[0] <= p[0] and p[1] <= m[1]]
>    if candidate_periods:
>      print m[0], "=>", min (candidate_periods)
>    else:
>      print m[0], "=>", "no period matches"
>
> </code>
>
> TJG

Thanks! I'll try it both ways and see if there's any appreciable
difference in speed, although since it will be packaged into an
executable, that may not be an issue anyway.

Mike



From orsenthil at gmail.com  Sun Sep  9 20:22:57 2007
From: orsenthil at gmail.com (O.R.Senthil Kumaran)
Date: Mon, 10 Sep 2007 05:52:57 +0530
Subject: os.sep and os.path.sep
In-Reply-To: <1189352918.534864.195850@g4g2000hsf.googlegroups.com>
References: <1189352918.534864.195850@g4g2000hsf.googlegroups.com>
Message-ID: <20070910002257.GA3416@gmail.com>

* billiejoex <gnewsg at gmail.com> [2007-09-09 08:48:38]:

> >>> import os
> >>> hasattr(os, 'sep')
> True
> >>> hasattr(os.path, 'sep')
> True
> 
> By chance I noticed it.
> Are there differences (I think not...)?
> IMHO, if there are no differences os.path.sep should be removed since
> it may be confusing.

If you lookup os module, not only os.sep but couple of other values are also imported from os.path. 

from os.path import (curdir, pardir, sep, pathsep, defpath, extsep, altsep,
    devnull)

Yes, you are right. There are no differences. They exists there for utility purposes. Removing them would be a bad idea.

-- 
O.R.Senthil Kumaran
http://uthcode.sarovar.org


From mccredie at gmail.com  Sun Sep 23 13:48:04 2007
From: mccredie at gmail.com (Matt McCredie)
Date: Sun, 23 Sep 2007 10:48:04 -0700
Subject: I could use some help making this Python code run faster using
	only Python code.
In-Reply-To: <1190491227.688310.247030@w3g2000hsg.googlegroups.com>
References: <1190325588.608625.259800@q3g2000prf.googlegroups.com>
	<1190328413.226577.206740@k79g2000hse.googlegroups.com>
	<1190330015.131971.265680@y42g2000hsy.googlegroups.com>
	<1190357165.381313.197910@19g2000hsx.googlegroups.com>
	<Xns99B25B0334892duncanbooth@127.0.0.1>
	<1190394011.148384.106280@q3g2000prf.googlegroups.com>
	<mailman.897.1190412168.2658.python-list@python.org>
	<1190417120.723579.267560@22g2000hsm.googlegroups.com>
	<5ljrklF8gic1U3@mid.uni-berlin.de>
	<1190491227.688310.247030@w3g2000hsg.googlegroups.com>
Message-ID: <9e95df10709231048k81179fbo31bb3cdbb09b8f22@mail.gmail.com>

> Yes, Digital Mars D is what I was referring to and yes I know D is not
> as efficient as C++.  If I knew of a good C++ compiler that is not
> from Microsoft that works natively with Windows I would be happy to
> consider using it.

I've had good luck with MinGW (gcc compiled for windows).

http://www.mingw.org

Matt


From bignose+hates-spam at benfinney.id.au  Wed Sep 19 23:41:06 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 20 Sep 2007 13:41:06 +1000
Subject: Mixin classes and single/multiple inheritance
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au>
	<46f0fba0$0$29605$426a34cc@news.free.fr>
	<1190199134.791808.267110@22g2000hsm.googlegroups.com>
	<mailman.778.1190225664.2658.python-list@python.org>
	<1190256493.827576.139470@r29g2000hsg.googlegroups.com>
	<877immvye0.fsf_-_@benfinney.id.au>
	<1190257864.945639.199230@k79g2000hse.googlegroups.com>
Message-ID: <87y7f2uhpp.fsf@benfinney.id.au>

Michele Simionato <michele.simionato at gmail.com> writes:

> It is already possible to use a syntax like this
> 
>  class MyClass(Base):
>     mixin(Mixin1, Mixin2, ...)
> 
> using P.J. Eby's trick for implementing what he calls class
> decorators (see also
> http://www.phyast.pitt.edu/~micheles/python/classinitializer.html)
> 
> But I would not use it, let's use the language we have, not
> to invent our own.

Okay. How do we use the language we have to achieve what mixin classes
achieve in Ruby? Can you give an code example that you *would*
recommend for someone looking to do what mixin classes do?

-- 
 \           "In case you haven?t noticed, [the USA] are now almost as |
  `\       feared and hated all over the world as the Nazis were."  -- |
_o__)                                              Kurt Vonnegut, 2004 |
Ben Finney


From bogus@does.not.exist.com  Fri Sep  7 09:03:45 2007
From: bogus@does.not.exist.com (Thin Myrna)
Date: Fri, 7 Sep 2007 15:03:45 +0200
Subject: wxPython unexpected exit
References: <1189152617.169438.296630@d55g2000hsg.googlegroups.com>
Message-ID: <46e14c12$0$11094$3b214f66@aconews.univie.ac.at>


"Jimmy" <mcknight0219 at gmail.com> wrote in message 
news:1189152617.169438.296630 at d55g2000hsg.googlegroups.com...
> Hi, wxPython is cool and easy to use, But I ran into a problem
> recently when I try to write a GUI.
> The thing is I want to periodically update the content of StatixText
> object, so after create them, I pack them into a list...the problem
> comes when I later try to extract them from the list! I don't know
> why?
> my code is as following:
>
> import wx, socket
> import thread
>
> class MyFrame(wx.Frame):
>
> firstrun = 0
> def __init__(self):
> wx.Frame.__init__(self, None, -1, 'Notifier')
> self.panel = wx.Panel(self, -1)
> self.length = 50
> self.scale = 0.6
> self.count = 5
> self.size = wx.Frame.GetSize(self)
> self.distance = self.size[1] / self.count
> self.labellist = []
> self.gaugelist = []
>
> def ParseAndDisplay(self, data):
> print "Successful access to main Frame class"
> print 'And receive data: ', data
> if MyFrame.firstrun == 0:
> print 'First time run'
> items = 3
> for i in range(items):
> self.labellist.append(wx.StaticText(self.panel, -1, data+str(i),
> (150, 50+i*20), (300,30)))
> MyFrame.firstrun = 1
> else:
> self.labellist[0].SetLabel('AAA')//PROGRAM WILL ABORT HERE!!!
> self.labellist[1].SetLabel("Guo")
> self.labellist[2].SetLabel("Qiang")
>
>
> class NetUdp:
>
> def __init__(self):
> self.port = 8081
> self.s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
> self.s.bind(("", self.port))
> print "Listening on port", self.port
>
> def recvdata(self):
> data, addr = self.s.recvfrom(1024)
> return data
>
>
> def netThread():
> netudp = NetUdp()
> while True:
> data = netudp.recvdata()
> frame.ParseAndDisplay(data)
>
> if __name__ == '__main__':
> firstrun = 0
> app = wx.PySimpleApp()
> frame = MyFrame()
> frame.Show()
> # start network thread first
> id = thread.start_new_thread(netThread, ())
> # main wxpython loop begins
> app.MainLoop()
>
> I know the code is ugly, but can anyone really save me here!
>

Communication OS thread -> wx has to be done in a certain way. You must not 
do this directly, i.e. you must not call wx code from w/i an OS thread. See 
the wxPython Demo for an example of what you want to do: Process and 
Events -> Threads.

Cheers
Thin




From cjt22 at bath.ac.uk  Tue Sep  4 07:52:47 2007
From: cjt22 at bath.ac.uk (cjt22 at bath.ac.uk)
Date: Tue, 04 Sep 2007 04:52:47 -0700
Subject: Printing lists in columns (was: TypeError: 'module object is not
	callable')
In-Reply-To: <Xns99A17FAC2587duncanbooth@127.0.0.1>
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<mailman.315.1188810174.28954.python-list@python.org>
	<46dbd11e$0$6228$426a74cc@news.free.fr>
	<mailman.317.1188812089.28954.python-list@python.org>
	<1188816626.021956.281040@22g2000hsm.googlegroups.com>
	<5k2cjmF1r2aiU1@mid.uni-berlin.de>
	<1188836008.656284.76160@o80g2000hse.googlegroups.com>
	<46dc6f49$0$6207$426a34cc@news.free.fr>
	<1188900397.459760.259580@k79g2000hse.googlegroups.com>
	<slrnfdqe3t.i4p.hat@se-162.se.wtb.tue.nl>
	<Xns99A17FAC2587duncanbooth@127.0.0.1>
Message-ID: <1188906767.737741.267350@19g2000hsx.googlegroups.com>


> But watch out if the lists aren't all the same length: zip won't pad out
> any sequences, so it maynotbe exactly what is wanted here:
>
> >>> x = ['1', '2', '3']
> >>> y = ['4', '5']
> >>> for row in zip(x,y):
>
>         print ', '.join(row)
>
> 1, 4
> 2, 5
>

Unfortunately the lists will be of different sizes
By the way I apologise for different questions within the same thread.
When I have another question, I will make a new topic




From daniel.j.larsson at gmail.com  Wed Sep  5 06:27:50 2007
From: daniel.j.larsson at gmail.com (Daniel Larsson)
Date: Wed, 5 Sep 2007 12:27:50 +0200
Subject: concise code (beginner)
In-Reply-To: <13dsvqrqivtf092@corp.supernews.com>
References: <13dsvqrqivtf092@corp.supernews.com>
Message-ID: <2bfa72fa0709050327y2edf081anb579cc7c65b75183@mail.gmail.com>

def process_devs(devs, fun):
    for dev in devs:
        try:
            fun(dev)
        except:
             print exception
             remove dev from devs
     return devs

process_devs(devs, lambda d: d.read1())
process_devs(devs, lambda d: d.read2())
...

On 9/5/07, bambam <david at asdf.asdf> wrote:
>
> I have about 30 pages (10 * 3 pages each) of code like this
> (following). Can anyone suggest a more compact way to
> code the exception handling? If there is an exception, I need
> to continue the loop, and continue the list.
>
> Steve.
>
> -----------------------------------
> for dev in devs
>     try:
>         dev.read1()
>     except
>         print exception
>         remove dev from devs
>
> for dev in devs
>     try:
>         dev.read2()
>     except
>         print exception
>         remove dev from devs
>
> for dev in devs
>     try:
>         dev.read3()
>     except
>         print exception
>         remove dev from devs
>
> etc.
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From paul.nospam at rudin.co.uk  Wed Sep  5 06:00:38 2007
From: paul.nospam at rudin.co.uk (Paul Rudin)
Date: Wed, 05 Sep 2007 11:00:38 +0100
Subject: creating really big lists
References: <1188985838.661821.41530@k79g2000hse.googlegroups.com>
Message-ID: <87ejhd2zzt.fsf@rudin.co.uk>

Dr Mephesto <dnhkng at googlemail.com> writes:

> Hi!
>
> I would like to create a pretty big list of lists; a list 3,000,000
> long, each entry containing 5 empty lists. My application will append
> data each of the 5 sublists, so they will be of varying lengths (so no
> arrays!).
>
> Does anyone know the most efficient way to do this? I have tried:
>
> list = [[[],[],[],[],[]] for _ in xrange(3000000)]
>
> but its not soooo fast. Is there a way to do this without looping?

You can do:

   [[[],[],[],[],[]]] * 3000000

although I don't know if it performs any better than what you already
have.


From bj_666 at gmx.net  Mon Sep 17 04:27:17 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 17 Sep 2007 08:27:17 GMT
Subject: where are the .pyc files?
References: <1189963710.714191.74440@n39g2000hsh.googlegroups.com>
	<5l57t1F655kfU5@mid.uni-berlin.de>
	<1189992200.860524.58620@w3g2000hsg.googlegroups.com>
Message-ID: <5l6s35F64s8vU1@mid.uni-berlin.de>

On Mon, 17 Sep 2007 01:23:20 +0000, Summercool wrote:

> On Sep 16, 10:36 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>>
>> The `*.pyc` files are usually only created when you import a module, not
>> when a module is run directly.
> 
> how come a program that runs directly doesn't need to be optimized
> into bytecode first?

Programs need to be compiled to bytecode and they actually are.  The
bytecode is just not dumped into a file but compiled at every run.

Ciao,
	Marc 'BlackJack' Rintsch


From sjmachin at lexicon.net  Sat Sep  1 01:13:30 2007
From: sjmachin at lexicon.net (John Machin)
Date: Fri, 31 Aug 2007 22:13:30 -0700
Subject: HowTo Use Cython on a Windows XP Box?
In-Reply-To: <1188618022.208258.15620@22g2000hsm.googlegroups.com>
References: <rO3Ci.32$453.27@trndny02>
	<1188618022.208258.15620@22g2000hsm.googlegroups.com>
Message-ID: <1188623610.532790.114000@o80g2000hse.googlegroups.com>

On Sep 1, 1:40 pm, Paul McGuire <pt... at austin.rr.com> wrote:
> On Aug 31, 9:06 pm, David Lees <debl2NoS... at verizon.net> wrote:
>
> > August 31, 2007
>
> > I just downloaded the current Cython release and have no problem running
> > the cpython.py translator on the demo code.  But when I try compiling, I
> > get an error complaining that my version of Python (which is the current
> > 2.5.1 downloaded from python.org) was compiled with Visual C++ 2003.  I
> > only have Visual C++ 2005 on my machine and am unable to find a download
> > of 2003 on the Microsoft site (no big surprise).  I have never built
> > Python from source.  Is it necessary or can someone suggest an alternative?
>
> > TIA
>
> > david lees
>
> Unless you are customizing Python (and you can accomplish a *lot*
> without doing so), it is not necessary to build Python from source.
> Download one of the pre-built Windows binaries and install it, or get
> the Win Python distribution from ActiveState and install that.  Then
> start writing your own Python demo scripts.
>

Paul, AFAICT the OP is referring not to CPython, but to Cython, which
is a Pyrex fork. See http://www.cython.org/

Building CPython from source is likely to be a red herring. The OP's
question appears to be "How do I, on Windows, compile C code generated
by Cython into a pyd that will play happily with the standard-issue
python.exe and python25.dll?", and is probably best directed to one of
the 3 forums mentioned on the above-referenced page.

HTH,
John






From ricaraoz at gmail.com  Fri Sep 21 19:15:34 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Fri, 21 Sep 2007 20:15:34 -0300
Subject: Counting method calls
Message-ID: <46F45096.2000509@bigfoot.com>

Hi, I know I'm being dumb but, why does it not work?

>>> class MyList(list):
...     def __init__(self):
...         self.calls = 0
...     def __getattr__(self, name):
...         self.calls += 1
...         return list.__getattribute__(self, name)

>>> a = MyList()
>>> a
[]
>>> a.append(1)
>>> a
[1]
>>> a.calls
88
>>> a.append(3)
>>> a.calls
88
>>> a.sort()
>>> a
[1, 3]
>>> a.calls
176


TIA


From mccredie at gmail.com  Tue Sep 25 12:18:30 2007
From: mccredie at gmail.com (Matimus)
Date: Tue, 25 Sep 2007 16:18:30 -0000
Subject: comparing elements of a list with a string
In-Reply-To: <1190734785.439839.303030@50g2000hsm.googlegroups.com>
References: <1190734785.439839.303030@50g2000hsm.googlegroups.com>
Message-ID: <1190737110.939047.101990@22g2000hsm.googlegroups.com>


Shriphani wrote:
> Hello all,
> I have a problem here. I have a list named list_of_files which
> contains filenames with their timestamps attached to the name. If I
> have a string "fstab", and I want to list out the files in whose names
> the word fstab appears should I go about like this :
>
> def listAllbackups(file):
>     list_of_files = os.listdir("/home/shriphani/backupdir")
>     for element in list_of_files:
>          if element.find(file) != -1:
>              date = ###
>              time = ####
>               return (date, time)
>
> The major trouble is that the return statement causes it to exit after
> attempt one. How do I use the yield statement here?

I would just do this:

[code]
from glob import glob
def listallbackupfiles(filename):
    return glob("/home/shriphani/backupdir/*%s*"%filename)
[/code]



From paul.nospam at rudin.co.uk  Tue Sep 18 13:19:37 2007
From: paul.nospam at rudin.co.uk (Paul Rudin)
Date: Tue, 18 Sep 2007 18:19:37 +0100
Subject: can Python be useful as functional?
References: <1190073045.618869.261290@k79g2000hse.googlegroups.com>
	<fcoth7$ae0$1@sea.gmane.org>
	<mailman.729.1190135451.2658.python-list@python.org>
Message-ID: <871wcvlwly.fsf@rudin.co.uk>

Robin Becker <robin at reportlab.com> writes:

> Steve Holden wrote:
>> Lorenzo Stella wrote:
> ......
>> So, which environment do you habitually use that provides an
>> *unlimited* stack?
>>
>> You remind me of the conversation between the philosopher and an
>> attractive lady whom he was seated next to at dinner. He asked her
>> if she would sleep with him for a million dollars, to which she
>> readily agreed. So he followed this by asking her if she'd sleep
>> with him for a dollar. She replied: "No. Do you take me for a
>> prostitutte?", to which his riposte was "We have already established
>> that fact, and are now merely haggling about the price".
>>
>
> allegedly G B Shaw
> (http://findarticles.com/p/articles/mi_qn4158/is_19980925/ai_n14182408)

Also allegedly Winston Churchill, although wikiquote says:

  "This is a very old joke where the participants vary dramatically
   from each telling. It's very unlikely though not impossible that
   the joke originated from Churchill."


From bignose+hates-spam at benfinney.id.au  Tue Sep 18 01:52:15 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 18 Sep 2007 15:52:15 +1000
Subject: super() doesn't get superclass
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<1i4lvsx.mhw5621jlsd53N%aleax@mac.com>
Message-ID: <87ir68zfjk.fsf@benfinney.id.au>

Sorry, I read your message too fast and responded to the wrong point
:-)

aleax at mac.com (Alex Martelli) writes:

> Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> > Am I mistaken in thinking that "superclass of foo" is equivalent
> > to "parent class of foo"? If so, I'd lay heavy odds that I'm not
> > alone in that thinking.
> 
> In general, "a superclass of foo" means "a class X such that foo is a
> sublass of X"

Read "ancestor" where I wrote "parent", then. It seems that (with that
substitution) my thinking is correct. Yes?

Why, then, does super() traverse the MRO of class 'A', instead of the
ancestors of class 'A'? And, since that's what it does, is it not
misnamed, since "next in the MRO" is *not* the same thing as
"superclass"?

-- 
 \      "Remember:  every member of your 'target audience' also owns a |
  `\        broadcasting station. These 'targets' can shoot back."  -- |
_o__)       Michael Rathbun to advertisers, news.admin.net-abuse.email |
Ben Finney


From martin at v.loewis.de  Tue Sep 11 17:06:42 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 11 Sep 2007 23:06:42 +0200
Subject: Py2.5.1 on Ubuntu AMD X2, unicode problems
In-Reply-To: <xqxps0pg1ma.fsf@cola3.ca.boeing.com>
References: <xqxps0pg1ma.fsf@cola3.ca.boeing.com>
Message-ID: <46e70362$0$7896$9b622d9e@news.freenet.de>

> I'm building 2.5.1 from source, using the ubuntu(7.0.4)-provided gcc
> 4.1.2.

Something must be terribly wrong with your system if you have to go
through such hassles. It should build out of the box, and does for
me on Debian.

Regards,
Martin


From wolf_tracks at invalid.com  Thu Sep 20 23:47:41 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Thu, 20 Sep 2007 20:47:41 -0700
Subject: An Editor that Skips to the End of a Def
In-Reply-To: <874phou1pa.fsf@benfinney.id.au>
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk>
	<tfAIi.51111$Um6.44314@newssvr12.news.prodigy.net>
	<YPGIi.54591$YL5.26012@newssvr29.news.prodigy.net>
	<874phou1pa.fsf@benfinney.id.au>
Message-ID: <e8HIi.3303$4J3.1378@newssvr22.news.prodigy.net>

How about in the case of MS Win?

Ben Finney wrote:
> "W. Watson" <wolf_tracks at invalid.com> writes:
> 
>> Is vim just an editor or is it capable of running and debugging a
>> program, as well?
> 
> (Please don't top-post. Instead, reply below each point to which
> you're responding, removing quoted text irrelevant to your response.)
> 
> Both Emacs and Vim are highly customisable text editors. They are
> configurable with complete programming languages specific to the
> program, and both have a huge community of programmers writing useful
> extensions.
> 
> So, neither of them is "just an editor"; they are editors at their
> core, that can become complete programming environments by taking
> already-written components for them. Your operating system
> distribution of either Vim or Emacs will already include many of these
> components when you install the package, and many more are available.
> 

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From steve at holdenweb.com  Tue Sep 11 23:14:18 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 11 Sep 2007 23:14:18 -0400
Subject: function to do dynamic import?
In-Reply-To: <13eek2h7lcikm5b@corp.supernews.com>
References: <13ecb84p1ghrd64@corp.supernews.com>	<mailman.378.1189513496.2658.python-list@python.org>
	<13eek2h7lcikm5b@corp.supernews.com>
Message-ID: <fc7li9$q0o$1@sea.gmane.org>

bambam wrote:
[...]
> def gim(self):
>     for gamel in self.gamel_list:
>         __import__(gamel['file'])
> 
> Works as hoped for. I did a web search for 'dynamic import' and
> the only examples I found used exec.
> 
> Thanks
> 
Cool. You're getting there!

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From rt at nospam.com  Tue Sep 18 17:58:48 2007
From: rt at nospam.com (Richard Townsend)
Date: Tue, 18 Sep 2007 22:58:48 +0100
Subject: Tutorial or Example (or Tutorial) of Using Canvas to Produce a
	Plot
References: <phRHi.50851$Um6.35199@newssvr12.news.prodigy.net>
	<13evohih7rkd030@corp.supernews.com>
	<WPTHi.5906$FO2.4148@newssvr14.news.prodigy.net>
	<13f0b2qlvj5ige6@corp.supernews.com>
	<hnWHi.9038$z_5.1095@nlpi069.nbdc.sbc.com>
Message-ID: <9ai0f39lejmjc2qbfcgo1t4h8b3e6ot9jd@4ax.com>

On Tue, 18 Sep 2007 13:18:36 -0700, "W. Watson"
<wolf_tracks at invalid.com> wrote:

>Tk is it. I'm really not interested in the others at this point.
>

John Grayson's book 'Python and Tkinter Programming' has a chapter on
plotting Graphs and Charts. You can even download that chapter as a
PDF file:

http://www.manning-source.com/books/grayson/grayson_ch11.pdf

See http://www.manning.com/grayson/ for more info about the book.



From zentraders at gmail.com  Thu Sep 27 20:51:58 2007
From: zentraders at gmail.com (Zentrader)
Date: Thu, 27 Sep 2007 17:51:58 -0700
Subject: Creating Table using Tkinter
In-Reply-To: <1190918535.924299.22750@k79g2000hse.googlegroups.com>
References: <1190918535.924299.22750@k79g2000hse.googlegroups.com>
Message-ID: <1190940718.952849.135510@k79g2000hse.googlegroups.com>


Two existing solutions are TableList + TableListWrapper (Google for
it), and MultiListBox
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52266  In both
cases you send the program the titles and data and the program takes
care of all of the details.  BTW, you can attach a scrollbar to any Tk
app, so that shouldn't be a concern.  See here for some scrollbar
examples.
http://infohost.nmt.edu/tcc/help/pubs/tkinter/



From skip at pobox.com  Sat Sep  1 15:15:54 2007
From: skip at pobox.com (Skip Montanaro)
Date: Sat, 1 Sep 2007 19:15:54 +0000 (UTC)
Subject: datetime.timedelta division confusion
References: <mailman.279.1188671323.28954.python-list@python.org>
	<1188672183.410842.27070@r29g2000hsg.googlegroups.com>
Message-ID: <loom.20070901T211511-772@post.gmane.org>

> Try d // 2 ?
> It may be that v2.6 considers / as __truediv__ and not __div__.

Ah, right you are.  Thanks...

Skip






From mensanator at aol.com  Sun Sep 16 20:45:24 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: Sun, 16 Sep 2007 17:45:24 -0700
Subject: Try this
In-Reply-To: <mailman.631.1189985407.2658.python-list@python.org>
References: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>
	<13eqsdfsfvsa16f@corp.supernews.com>
	<1189969529.652871.19280@50g2000hsm.googlegroups.com>
	<mailman.621.1189970593.2658.python-list@python.org>
	<1189979679.969074.216490@y42g2000hsy.googlegroups.com>
	<1189981681.745195.18130@y42g2000hsy.googlegroups.com>
	<1189983233.709832.124290@19g2000hsx.googlegroups.com>
	<mailman.631.1189985407.2658.python-list@python.org>
Message-ID: <1189989924.078654.9290@k79g2000hse.googlegroups.com>

On Sep 16, 6:25?pm, Steve Holden <st... at holdenweb.com> wrote:
> mensana... at aol.com wrote:
> > On Sep 16, 5:28?pm, John Machin <sjmac... at lexicon.net> wrote:
> >> On Sep 17, 7:54 am, "mensana... at aol.com" <mensana... at aol.com> wrote:
>
> >>> On Sep 16, 2:22?pm, Steve Holden <st... at holdenweb.com> wrote:
> >>>> mensana... at aol.com wrote:
> >>>>> On Sep 16, 1:10?pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> >>>>>> On Sun, 16 Sep 2007 01:46:34 -0700, GeorgeRXZ <george... at gmail.com>
> >>>>>> declaimed the following in comp.lang.python:
> >>>>>>> Then Open the Notepad and type the following sentence, and save the
> >>>>>>> file and close the notepad. Now reopen the file and you will find out
> >>>>>>> that, Notepad is not able to save the following text line.
> >>>>>>> Well you are speed
> >>>>>>> This occurs not only with above sentence but any sentence that has
> >>>>>>> 4 3 3 5 (sequence of characters: Well=4 you=3 are=3 speed=5)
> >>>>>>         I tried. I also opened the saved file in SciTE...
> >>>>>> And the text WAS there...
> >>>>>>         It is Notepad that can not properly render what it,
> >>>>>> itself, saved.
> >>>>> C:\Documents and Settings\mensanator\My Documents>type huh.txt
> >>>>> Well you are speed
> >>>>> Yes, file was saved correctly.
> >>>>> But reopening it shows 9 unprintable characters.
> >>>>> If I copy those to a new file (huh1.txt):
> >>>>> C:\Documents and Settings\mensanator\My Documents>type huh1.txt
> >>>>> ?????????
> >>>>> But wait...the new file is 20 characters, not 9.
> >>>>> 09/16/2007  01:44 PM                18 huh.txt
> >>>>> 09/16/2007  01:54 PM                20 huh1.txt
> >>>>> C:\Documents and Settings\mensanator\My Documents>dump huh.txt
> >>>>> huh.txt:
> >>>>> 00000000  5765 6c6c 2079 6f75 2061 7265 2073 7065 Well you are spe
> >>>>> 00000010  6564                                    ed
> >>>>> Here's what it's actually doing:
> >>>>> C:\Documents and Settings\mensanator\My Documents>dump huh1.txt
> >>>>> huh1.txt:
> >>>>> 00000000  fffe 5765 6c6c 2079 6f75 2061 7265 2073 .~Well you are s
> >>>>> 00000010  7065 6564                               peed
> >>>> One word: Unicode.
> >>>> The "open" and "save" dialogs allow you to specify an encoding.
> >>> And the encoding specified was ANSI.
> >>>> If you
> >>>> specify Unicode the you will get what you see above.
> >>> And if you specify ANSI _before_ you click the file name,
> >>> the specification switches to Unicode and has to then
> >>> be manually switched back to ANSI.
> >>>> If you specify ANSI
> >>>> you will get the text you entered.
> >>> It's still a bug in the "open" dialog.
> >> It's more like a bug/feature in its encoding detector.
>
> > It is NOT a feature. If I save something as ANSI,
> > there is no excuse for it not to re-open in ANSI.
>
> >> I can get it to
> >> switch to Unicode only if there's an even number of characters AND the
> >> line is NOT terminated by CRLF -- add/remove one alpha character, or
> >> hit the enter key at the end of the line, and it won't detect it as
> >> Unicode when you open it again.
>
> >> You only get the BOM (0xfffe) if you are silly enough to save it while
> >> it's open in Unicode mode.
>
> > That was a test. I wasn't so stupid as to save
> > to the original file, but to make a copy.
>
> >>>> By the way, this has precisely what to do with Python?
> >>> I've been known to use Notepad to create Python
> >>> source code.
> >> Your source code would have to be trivially short to trigger the
> >> strange behaviour.
>
> > Makes you wonder what other edge cases aren't
> > handled properly.
>
> > Makes you wonder why Microsoft doesn't employ
> > professional programmers.
>
> Makes *me* wonder why you haven't got better things to do with your time.

It's Sunday.

>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
>
> Sorry, the dog ate my .sigline- Hide quoted text -
>
> - Show quoted text -




From gagsl-py2 at yahoo.com.ar  Fri Sep  7 22:49:12 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 07 Sep 2007 23:49:12 -0300
Subject: subprocess.communicate messes things up
References: <1189216294.958415.289400@r29g2000hsg.googlegroups.com>
Message-ID: <op.tybd4aikx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 07 Sep 2007 22:51:34 -0300, <KingShivan at gmail.com> escribi?:

> problem is that the first time I press a key, it works, but after it
> just print the keys I press, the annoying line being the one with
> communicate, any idea of what is happening ?
>
> 	child1 = subprocess.Popen("/usr/bin/mplayer -slave -quiet -
> idle",stdin=subprocess.PIPE,stdout=FNULL,stderr=FNULL,shell=True)
> 	while 1:
> 		ch=getkey()
> 		name=os.listdir("/home/shivan/"+ch)
> 		file_to_load = "/home/shivan/"+ch+"/"+name[0]
> 		print "loadfile "+file_to_load
> 		output, errors = child1.communicate("loadfile "+file_to_load+" \n")

communicate sends its input and waits until the process finishes,  
collecting all output. So it's not adequate for your needs.
You should write directly to child1.stdin: child1.stdin.write("loadfile  
"+file_to_load+" \n")

-- 
Gabriel Genellina



From na at na.com  Wed Sep 12 09:08:12 2007
From: na at na.com (Josh)
Date: Wed, 12 Sep 2007 09:08:12 -0400
Subject: pythonesque constructs for c++
Message-ID: <fc8oc8$12vc$1@grapevine.csail.mit.edu>

One of the best features of python is its ease of use, and the ease of use 
of its modules. Modules like os, os.path, and datetime are invaluable!

Does anyone know of analagous c++ libraries? It seems to me that most of the 
functionality of these modules could easily be replicated in c++. Before I 
go about doing that, I was just wondering if anyone knows if they already 
exist?

thanks,
Josh




From ricaraoz at gmail.com  Sun Sep  9 19:16:52 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Sun, 09 Sep 2007 20:16:52 -0300
Subject: Modul (%) in python not like in C?
In-Reply-To: <1189377800.482587.143060@22g2000hsm.googlegroups.com>
References: <880dece00709091201n449d4c2k31998a5d426de17d@mail.gmail.com>	<46E4466C.2030303@sdf.lonestar.org>	<mailman.300.1189371539.2658.python-list@python.org>	<slrnfe8rgp.66h.missive@dell.linuxdev.us.dell.com>
	<1189377800.482587.143060@22g2000hsm.googlegroups.com>
Message-ID: <46E47EE4.5080801@bigfoot.com>

John Machin wrote:
> On Sep 10, 8:05 am, Lee Harr <miss... at frontiernet.net> wrote:
>>>> Python will always yield a number x = m%n such that 0 <= x < n, but
>>>> Turbo C will always yield a number such that if x = m%n -x = -m%n.  That
>>>> is, since 111 % 10 = 1, -111 % 10 = -1.  The two values will always
>>>> differ by n (as used above).
>> Maybe it is an order-of-operations thing....
>>
>> -111 % 10 = -1
>> (-111) % 10 = 9
>> ?
> 
> and on the other hand, maybe it's not. Try to think of any language
> where unary minus binds so loosely.

Why the theoretical argument when you can TEST your assumptions?

>>> -111 % 10
9
>>> (-111) % 10
9




From rcdailey at gmail.com  Mon Sep 24 22:51:57 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Mon, 24 Sep 2007 21:51:57 -0500
Subject: Regular Expressions: Can't quite figure this problem out
In-Reply-To: <fd9rs6$8b2$1@sea.gmane.org>
References: <496954360709241737o6e42e7efk29886b5631f6ca2e@mail.gmail.com>
	<a49e45f50709241827i107d0acav28431853ef403702@mail.gmail.com>
	<496954360709241853w6bb6e813ved0ec4fc80304d51@mail.gmail.com>
	<op.ty6tjyfqx6zn5v@gabriel2.softlabbsas.com.ar>
	<496954360709241917m3801e4aavee29cfef7deaf41b@mail.gmail.com>
	<fd9rs6$8b2$1@sea.gmane.org>
Message-ID: <496954360709241951h6901d60etf2c4b3b5ec759f2a@mail.gmail.com>

What I meant was that it's not an option because I'm trying to learn regular
expressions. RE is just as built in as anything else.

On 9/24/07, Steve Holden <steve at holdenweb.com> wrote:
>
> Robert Dailey wrote:
> >
> >
> > On 9/24/07, *Gabriel Genellina* <gagsl-py2 at yahoo.com.ar
> > <mailto:gagsl-py2 at yahoo.com.ar>> wrote:
> >
> >     Yes: forget about regular expressions. ElementTree does that for
> free:
> >
> >
> > That's not an option.
> >
> Even though it's built into Python 2.5? That's a strange requirement.
>
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From welcomestocontact at gmail.com  Wed Sep 19 06:10:12 2007
From: welcomestocontact at gmail.com (welcomestocontact at gmail.com)
Date: Wed, 19 Sep 2007 03:10:12 -0700
Subject: HTTP Protocol Client
Message-ID: <1190196612.082912.149690@v23g2000prn.googlegroups.com>

 Hi,

I am writing http protocol to get some data from servers. If i was
using my localhost, getting replay from local and if want access other
remote sites, i am getting error. Please reply it

My localhost client script:::

Code: ( python )


import httplib

h = httplib.HTTP('localhost',80)

h.putrequest('GET','')

h.putheader('User-Agent','Lame Tutorial Code')

h.putheader('Accept','text/html')

h.endheaders()

errcode,errmsg, headers = h.getreply()

print errcode,errmsg, headers


f = h.getfile() # Get file object for reading data

data = f.read()

print data

f.close()





the Reply getting from this::::


403 Forbidden Date: Tue, 18 Sep 2007 05:20:36 GMT

Server: Apache/2.0.52 (Red Hat)

Accept-Ranges: bytes

Content-Length: 3985

Connection: close

Content-Type: text/html; charset=UTF-8

And some Html script




If I want to access other sites:::


import httplib

h = httplib.HTTP('http://Google.com',80)

h.putrequest('GET','')

h.putheader('User-Agent','Lame Tutorial Code')

h.putheader('Accept','text/html')

h.endheaders()



errcode,errmsg, headers = h.getreply()

print errcode,errmsg, headers


f = h.getfile() # Get file object for reading data

data = f.read()

print data

f.close()


I got the error like:::

Traceback (most recent call last):
File "c.py", line 6, in ?
h.endheaders()
File "/usr/lib/python2.3/httplib.py", line 712, in endheaders
self._send_output()
File "/usr/lib/python2.3/httplib.py", line 597, in _send_output
self.send(msg)
File "/usr/lib/python2.3/httplib.py", line 564, in send
self.connect()
File "/usr/lib/python2.3/httplib.py", line 532, in connect
socket.SOCK_STREAM):
socket.gaierror: (-2, 'Name or service not known')


How can I access Remote sites using http protocol . I did'nt write
server script.


Thanks And Regards
Allavarapu



From hniksic at xemacs.org  Thu Sep 20 04:31:46 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Thu, 20 Sep 2007 10:31:46 +0200
Subject: super() doesn't get superclass
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au> <87k5qn5cwi.fsf@mulj.homelinux.net>
	<87y7f2w0xj.fsf@benfinney.id.au>
Message-ID: <87tzppivpp.fsf@mulj.homelinux.net>

Ben Finney <bignose+hates-spam at benfinney.id.au> writes:

>> The definition of superclass is not the issue, the issue is
>> "superclass *of which class*"?  You expect super(A, self) to iterate
>> only over superclasses of A, even when self is an instance of a
>> subtype of A.
>
> Yes. Those are the specific parameters to the function call, so that
> *is* what I expect.

The specific parameters are a type and an instance.  Those same
parameters can and do allow for an implementation that accesses
supertypes of type(self).  That is in fact more logical; otherwise one
could simply iterate over A.__bases__ and we wouldn't need an
elaborate 'super' construct.

Not iterating only over A's superclasses is the entire *point* of
super.  The only deficiency of super I see in this thread is
incomplete documentation.


From george.sakkis at gmail.com  Mon Sep 17 09:48:41 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: Mon, 17 Sep 2007 13:48:41 -0000
Subject: simple regular expression problem
In-Reply-To: <1190034041.796626.66790@n39g2000hsh.googlegroups.com>
References: <1190034041.796626.66790@n39g2000hsh.googlegroups.com>
Message-ID: <1190036921.873800.28470@k79g2000hse.googlegroups.com>

On Sep 17, 9:00 am, duikboot <dijkstra.ar... at gmail.com> wrote:

> Hello,
>
> I am trying to extract a list of strings from a text. I am looking it
> for hours now, googling didn't help either.
> Could you please help me?
>
> >>>s = """ \n<organisatie>\n<Profiel_Id>28996</Profiel_Id>\n</organisatie>\n<organisatie>\n<Profiel_Id>28997</Profiel_Id>\n</organisatie>"""
> >>> regex = re.compile(r'<organisatie.*</organisatie>', re.S)
> >>> L = regex.findall(s)
> >>> print L
>
> ['organisatie>\n<Profiel_Id>28996</Profiel_Id>\n</organisatie>
> \n<organisatie>\n<Profiel_Id>28997</Profiel_Id>\n</organisatie']
>
> I expected:
> [('organisatie>\n<Profiel_Id>28996</Profiel_Id>\n</organisatie>
> \n<organisatie>), (<organisatie>\n<Profiel_Id>28997</Profiel_Id>\n</
> organisatie')]
>
> I must be missing something very obvious.

The less obvious thing that you're missing is that regular expressions
is not the best solution to every text-related problem. Thinking at a
higher level helps sometimes; for example here you don't  want to
extract "a list of strings from a text", you want to extract specific
elements from an XML data source. There are several standard and non
standard python packages for XML processing, look for them online.
Here's how to do it using the (3rd party) BeautyfulSoup module:

>>> from BeautifulSoup import BeautifulStoneSoup
>>> BeautifulStoneSoup(s).findAll('organisatie')
[<organisatie>
<profiel_id>28996</profiel_id>
</organisatie>, <organisatie>
<profiel_id>28997</profiel_id>
</organisatie>]


HTH,
George



From rcdailey at gmail.com  Tue Sep 25 10:43:03 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Tue, 25 Sep 2007 09:43:03 -0500
Subject: Python script to optimize XML text
In-Reply-To: <46F8B985.7000803@web.de>
References: <496954360709241336i43173947sda5245c2d7477ecb@mail.gmail.com>
	<mailman.1018.1190687230.2658.python-list@python.org>
	<46F8B985.7000803@web.de>
Message-ID: <496954360709250743t6eec0d51x6d713a97317e6260@mail.gmail.com>

Hey guys,

Thanks for everyone's input. I wanted to learn regular expressions, however
I'm finding them to be quite evil. I think I've learned that it's always a
good idea to make regex a very LAST resort. This is my opinion I'm
developing on. In any case, I like the ideas mentioned here concerning using
the XML parser to do the job for me. Thanks again everyone, I think I'll be
going with the XML parser to do what I need.

Have a good day everyone.

On 9/25/07, Stefan Behnel <stefan.behnel-n05pAM at web.de> wrote:
>
> Gabriel Genellina wrote:
> > En Mon, 24 Sep 2007 17:36:05 -0300, Robert Dailey <rcdailey at gmail.com>
> > escribi?:
> >
> >> I'm currently seeking a python script that provides a way of
> >> optimizing out
> >> useless characters in an XML document to provide the optimal size for
> the
> >> file. For example, assume the following XML script:
> >>
> >> <root>
> >>     <Test></Test>
> >>     <!-- <CommentedOutElement/> -->
> >>
> >>     <!-- Do Something Else -->
> >> </root>
> >>
> >> By running this through an XML optimizer, the file would appear as:
> >>
> >> <root><Test/></root>
> >
> > ElementTree does that almost for free.
>
> As the OP is currently using lxml.etree (and as this was a cross-post to
> c.l.py and lxml-dev), I already answered on the lxml list.
>
> This is just to mention that the XMLParser of lxml.etree accepts keyword
> options to ignore plain whitespace content, comments and processing
> instructions, and that you can provide a DTD to tell it what
> whitespace-only
> content really is "useless" in the sense of your specific application.
>
> Stefan
> --
> http://mail.python.org/mailman/listinfo/python-list
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From deets at nospam.web.de  Wed Sep 19 05:50:21 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 19 Sep 2007 11:50:21 +0200
Subject: AttributeError: How to list existing attributes?
References: <5lc8lbF79ba8U1@mid.individual.net>
Message-ID: <5lc9mtF7hll5U1@mid.uni-berlin.de>

Thomas Guettler wrote:

> Hi,
> 
> how can you list the attributes of an object if you catch an
> AttributeError?
> 
> I couldn't find a reference in the exception object, which
> points to the object.
> 
> I want to call dir() on the object to list the user the known
> attributes.
> 
> Is there a way to find the object by inspecting the stacktrace?

By looking at the code at the line the stacktrace lists? And at least for
me, there is a type-information as well:

Python 2.5.1 (r251:54863, May  2 2007, 16:56:35)
[GCC 4.1.2 (Ubuntu 4.1.2-0ubuntu4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
clWelcome to rlcompleter2 0.96
for nice experiences hit <tab> multiple times
>>> class Foo(object): pass
...
>>> f = Foo()
>>> f.foo
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'Foo' object has no attribute 'foo'
>>>                                   

You can't possibly know which attributes the object has, though. Because it
might be an attribute dynamically added.

So the best thing is to put a print-statement before the exception-throwing
line or put a 

import pdb; pdb.set_trace()

there, and fiddle around with the object.

Diez


From aleax at mac.com  Wed Sep  5 01:15:52 2007
From: aleax at mac.com (Alex Martelli)
Date: Tue, 4 Sep 2007 22:15:52 -0700
Subject: Sort of an odd way to debug...
References: <1188933503.704007.285590@22g2000hsm.googlegroups.com>
Message-ID: <1i3xrwm.ah5pxyzzlxnaN%aleax@mac.com>

xkenneth <xkenneth at gmail.com> wrote:
   ...
> What I'd like to do, is define a base class. This base class would
> have a function, that gets called every time another function is
> called (regardless of whether in the base class or a derived class),
> and prints the doc string of each function whenever it's called. I'd
> like to be able to do this without explicitly specifying the function
> inside all of the other functions of a base class or derived class.

So you need to write a metaclass that wraps every function attribute of
the class into a wrapper performing such prints as you desire.  The
metaclass will be inherited by subclasses (unless metaclass conflicts
intervene in multiple-inheritance situation).

You don't appear to need the printing-wrapper to be a method, and it's
simpler to have it be a freestanding function, such as:

import functools
def make_printing_wrapper(f):
    @functools.wraps(f)
    def wrapper(*a, **k):
        print f.__doc__
        return f(*a, **k)
    return wrapper

Now, the metaclass could be, say:

import inspect
class MetaWrapFunctions(type):
    def __init__(cls, name, bases, attrs):
        for k, f in attrs.iteritems():
            if inspect.isfunction(f):
                attrs[k] = make_printing_wrapper(f)
        type.__init__(cls, name, bases, attrs)

and the base class:

class Base:
    __metaclass__ = MetaWrapFunctions

Now, the code:

> class Derived(Base):
>     """This function prints something"""
>     def printSometing(something)
>          #ghost function get's called here
>          print something
> 
> Output would be:
> This function prints something
> something

Should behave as you described.  I have not tested the code I'm
suggesting (so there might be some errors of detail) but the general
idea should work.


Alex


From nospam.please at alum.com  Tue Sep  4 09:42:42 2007
From: nospam.please at alum.com (n o s p a m p l e a s e)
Date: Tue, 04 Sep 2007 06:42:42 -0700
Subject: Calling a dos batch file from python
Message-ID: <1188913362.279426.290370@r34g2000hsd.googlegroups.com>

Suppose I have a batch file called mybatch.bat  and I want to run it
from a python script. How can I call this batch file in python script?

Thanx/NSP



From ptmcg at austin.rr.com  Sat Sep  8 20:10:38 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Sat, 08 Sep 2007 17:10:38 -0700
Subject: Parsing nested constructs
In-Reply-To: <46e308d3$0$9153$426a74cc@news.free.fr>
References: <46e308d3$0$9153$426a74cc@news.free.fr>
Message-ID: <1189296638.625012.286250@k79g2000hse.googlegroups.com>

On Sep 8, 3:42 pm, tool69 <k... at free.fr> wrote:
> Hi,
>
> I need to parse some source with nested parenthesis, like this :
>
>  >cut-------------
>
> {
>      {item1}
>      {
>       {item2}
>       {item3}
>      }
>
> }
>
>  >cut-------------
>
> In fact I'd like to get all start indexes of items and their end (or
> lenght).
>
> I know regexps are rather limited for this type of problems.
> I don't need an external module.
>
> What would you suggest me ?
>
> Thanks.

Well, it is an external module, but pyparsing makes this pretty
straightforward:

from pyparsing import *

data = """
{
     {item1}
     {
      {item2}
      {item3}
     }

}
"""

# define delimiters, but suppress them from the output
LBRACE,RBRACE = map(Suppress,"{}")

# forward define recursive items list
items = Forward()

# items is zero or more words of alphas and numbers, or an embedded
# group enclosed in braces
items << ZeroOrMore( Word(alphanums) | Group( LBRACE + items +
RBRACE ) )

# parse the input string, and print out the results
print items.parseString(data)

"""
prints:
[[['item1'], [['item2'], ['item3']]]]

or:
[
    [
        ['item1'],
        [
            ['item2'],
            ['item3']
        ]
    ]
]
"""

-- Paul



From gigs at hi.t-com.hr  Fri Sep 14 09:58:39 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Fri, 14 Sep 2007 15:58:39 +0200
Subject: recursion
In-Reply-To: <mailman.532.1189774061.2658.python-list@python.org>
References: <fcbfnj$lh4$1@ss408.t-com.hr>	<slrnfeinvk.1cc.horpner@FIAD06.norwich.edu>	<mailman.491.1189700115.2658.python-list@python.org>	<slrnfeit3k.1lg.horpner@FIAD06.norwich.edu>	<fcdrv9$7lr$1@ss408.t-com.hr>
	<mailman.532.1189774061.2658.python-list@python.org>
Message-ID: <fce42o$sig$1@ss408.t-com.hr>

Steve Holden wrote:
> Gigs_ wrote:
>> sorry i think that i express wrong. having problem with english
>>
>>
>> what i mean is how python knows to add all thing at the end of recursion
>>
>>  >>> def f(l):
>>      if l == []:
>>          return []
>>      else:
>>          return f(l[1:]) + l[:1]
>>
>>
>> f([1,2,3])
>>
>> recursion1   f([2,3]) + [1]
>>
>> recursion2   f([3]) + [2]  or [2, 1]?
>>
>> recursion3   f([]) + [3] or   [3, 2, 1]
>>
>>
>> i dont get all this
>>
>>  >>> def f(l):
>>      if l == []:
>>     print l
>>          return []
>>      else:
>>          return f(l[1:]) + l[:1]
>>
>>  >>> f([1,2,3])
>> []
>> [3, 2, 1]  # how this come here? how python save  variables from each 
>> recursion?
>>
>>
>> sorry again for first post
>>
> I think the thing you are missing is that the recursive call f(l[1:]) in 
> the return statement causes the current call to be suspended until the 
> recursive call is complete. The new call has its own value for l, which 
> is the caller's l[1:]. Each new call creates a completely new namespace.
> 
> A less complicated function might make it a little more obvious.
> 
>  def factorial(n):
>     print "n =", n
>     if n=0:
>         return 1
>     else:
>         return n * factorial(n-1)
> 
> Try running that with a few different arguments to show you how the 
> recursion works.
> 
> regards
>  Steve
 >>> def factorial(n):
    print "n =", n
    if n==0:
        return 1
    else:
        return n * factorial(n-1)

 >>> factorial(3)
n = 3
n = 2
n = 1
n = 0
6


now i understand. but one question at the end this function return 1. how python 
knows that it needs to multiply 1 with all recursive returns. (why python didnt 
sum recursive return with 1?)


that will be all, thanks in advance


From knipknap at gmail.com  Tue Sep 25 09:17:01 2007
From: knipknap at gmail.com (Samuel)
Date: Tue, 25 Sep 2007 06:17:01 -0700
Subject: ANNOUNCE: Exscript 0.9.9
Message-ID: <1190726221.366322.87240@k79g2000hse.googlegroups.com>

Introduction
-------------
Exscript is a scripting language for automating Telnet or SSH
sessions. It supports a wide range of features, such as
parallelization, AAA authentication methods, TACACS, and a very simple
template language.

This release comes with many new features, and the documentation was
also greatly improved. Please refer to the project page for
documentation.

A lot of changes were made since release 0.9.8, so 0.9.9 was added
before the final 1.0. Hopefully this will be the last release before
1.0 stable.

New since 0.9.8
------------------
* The SSH adapter was completely reworked and should now be on par
with the Telnet adapter.
* The telnet adapter now supports negotiation. This means that a
connection should now automatically choose a script-friendly terminal
type. (e.g. one that uses no color control characters).
* Exscript is now fully supported on Python >= 2.2.
* SSH support is now optional. The protocol adapters are now loaded
dynamically, such that SSH does not have to be installed if only
Telnet is used.
* The error handling of the parser was greatly improved, and more
errors should now be detected at compile time.
* Prompt recognition was further improved.
* It is now possible to use \r and \n in strings.
* Strings may now be concatenated using the "." operator.
* Added "in" and "not in" operators for searching through a list.
* Fixed: Escaping of some characters outside of code context did not
work.
* Fixed: Escaping quotes in a string would not work.
* Added support for using $-prefixed variable names in strings.
* Added the builtin variable "response", that now includes the
response of the last command.
* #-prefixed lines are now comments.
* Fixed a bug that some operations would not work when accessing the
iterator variable in the body of a loop tag.
* Fix: In several cases accessing a variable would fail.
* Added support for "while" and "until" loops.
* Added support for "into" keyword.
* Use friendlier thread names.

Dependencies
-------------
* Python 2.2 or greater
* Python-crypto
* Python-pexpect (optional, for SSH support)
* ssh (optional, for SSH support)

Download Exscript
------------------
Release: http://exscript.googlecode.com/files/exscript-0.9.9.tgz
SVN instructions: http://code.google.com/p/exscript/source

Links
------
Exscript project page: http://code.google.com/p/exscript/
Mailing list: http://groups.google.com/group/exscript
Bug tracker: http://code.google.com/p/exscript/issues/list
Browse the source: http://exscript.googlecode.com/svn/trunk/



From sreisscruz at gmail.com  Tue Sep 11 20:08:47 2007
From: sreisscruz at gmail.com (Steve)
Date: Tue, 11 Sep 2007 17:08:47 -0700
Subject: Help With PyParsing of output from win32pdhutil.ShowAllProcesses()
In-Reply-To: <1189534321.833098.114700@g4g2000hsf.googlegroups.com>
References: <1189534321.833098.114700@g4g2000hsf.googlegroups.com>
Message-ID: <1189555727.675690.143240@v23g2000prn.googlegroups.com>

Hi All,

I did a lot of digging into the code in the module, win32pdhutil, and
decided to create some custom methods.


added to : import win32pdhutil



def ShowAllProcessesAsList():

    object = find_pdh_counter_localized_name("Process")
    items, instances =
win32pdh.EnumObjectItems(None,None,object,win32pdh.PERF_DETAIL_WIZARD)

    # Need to track multiple instances of the same name.
    instance_dict = {}
    all_process_dict = {}

    for instance in instances:
        try:
            instance_dict[instance] = instance_dict[instance] + 1
        except KeyError:
            instance_dict[instance] = 0

    # Bit of a hack to get useful info.

    items = [find_pdh_counter_localized_name("ID Process")] + items[:
5]
#    print items
#    print "Process Name", string.join(items,",")

    all_process_dict['Headings'] = items                    # add
headings to dict

    for instance, max_instances in instance_dict.items():

        for inum in xrange(max_instances+1):
            hq = win32pdh.OpenQuery()
            hcs = []
            row = []

            for item in items:
                path =
win32pdh.MakeCounterPath( (None,object,instance,None, inum, item) )
                hcs.append(win32pdh.AddCounter(hq, path))

            win32pdh.CollectQueryData(hq)
            # as per http://support.microsoft.com/default.aspx?scid=kb;EN-US;q262938,
some "%" based
            # counters need two collections
            time.sleep(0.01)
            win32pdh.CollectQueryData(hq)
#            print "%-15s\t" % (instance[:15]),

            row.append(instance[:15])

            for hc in hcs:
                type, val = win32pdh.GetFormattedCounterValue(hc,
win32pdh.PDH_FMT_LONG)
#                print "item : %5d" % (val),
                row.append(val)
                win32pdh.RemoveCounter(hc)

#            print
#            print ' row = ', instance ,row
            all_process_dict[instance] = row                    # add
current row to dict

            win32pdh.CloseQuery(hq)

    return all_process_dict


def ShowSingleProcessAsList(sProcessName):

    object = find_pdh_counter_localized_name("Process")
    items, instances =
win32pdh.EnumObjectItems(None,None,object,win32pdh.PERF_DETAIL_WIZARD)

    # Need to track multiple instances of the same name.
    instance_dict = {}
    all_process_dict = {}

    for instance in instances:
        try:
            instance_dict[instance] = instance_dict[instance] + 1
        except KeyError:
            instance_dict[instance] = 0

    # Bit of a hack to get useful info.

    items = [find_pdh_counter_localized_name("ID Process")] + items[:
5]
#    print items
#    print "Process Name", string.join(items,",")

#    all_process_dict['Headings'] = items                    # add
headings to dict

#    print 'instance dict = ', instance_dict
#    print

    if sProcessName in instance_dict:
        instance = sProcessName
        max_instances = instance_dict[sProcessName]
#        print sProcessName, '  max_instances = ', max_instances

        for inum in xrange(max_instances+1):
            hq = win32pdh.OpenQuery()
            hcs = []
            row = []

            for item in items:
                path =
win32pdh.MakeCounterPath( (None,object,instance,None, inum, item) )
                hcs.append(win32pdh.AddCounter(hq, path))

            try:
              win32pdh.CollectQueryData(hq)
            except:
              all_process_dict[sProcessName] =
[0,0,0,0,0,0,0]          # process not found - set to all zeros
              break

            # as per http://support.microsoft.com/default.aspx?scid=kb;EN-US;q262938,
some "%" based
            # counters need two collections
            time.sleep(0.01)
            win32pdh.CollectQueryData(hq)
#            print "%-15s\t" % (instance[:15]),

            row.append(instance[:15])

            for hc in hcs:
                type, val = win32pdh.GetFormattedCounterValue(hc,
win32pdh.PDH_FMT_LONG)
#                print "item : %5d" % (val),
                row.append(val)
                win32pdh.RemoveCounter(hc)

#            print
#            print ' row = ', instance ,row
            all_process_dict[instance] = row                    # add
current row to dict

            win32pdh.CloseQuery(hq)
    else:
      all_process_dict[sProcessName] = [0,0,0,0,0,0,0]          #
process not found - set to all zeros

    return all_process_dict

=============================

Demo :

import win32pdhutil      # with customized methods in win32pdhutil
(above)


###################################################################
#              GetMemoryStats                                     #
###################################################################

def GetMemoryStats(sProcessName, iPauseTime):

  Memory_Dict = {}

## Headings   ['ProcessName', '% Processor Time', '% User Time', '%
Privileged Time', 'Virtual Bytes Peak', 'Virtual Bytes']
##machine process  =  {'firefox': ['firefox', 2364, 0, 0, 0,
242847744, 211558400]}

  loop_counter = 0

  print('\n\n** Starting Free Memory Sampler **\n\n')
  print('Process : %s\n  Delay : %d  seconds\n\n') % (sProcessName,
iPauseTime)
  print('\n\nPress : Ctrl-C to stop and output stats...\n\n')


  try:

      while 1:
        print('Sample : %d') % loop_counter
        row = []

        machine_process =
win32pdhutil2.ShowSingleProcessAsList(sProcessName)
#        print 'machine process  = ', machine_process
        row.append(machine_process[sProcessName]
[5])                         # Virtual Bytes Peak
        row.append(machine_process[sProcessName]
[6])                         # Virtual Bytes

        Memory_Dict[loop_counter] =
row                                      # add values to the
dictionary
        loop_counter += 1
        time.sleep(iPauseTime)

  except KeyboardInterrupt:                 # Ctrl-C encountered
    print "End of Sample...\n\n"


  return Memory_Dict


###################################################################
#############           M A I N         ###########################
###################################################################

def Main():

  iPause_time = 5                             # pause time - seconds
  sProcessName = 'firefox'                    # Process to watch
  sReportFileName = 'MemoryStats.csv'         # output filename

  Memory_Dict = GetMemoryStats(sProcessName, iPause_time)


  outfile = open(sReportFileName,"w")       # send output to a file
  outfile.write('SampleTime, VirtualBytesMax, VirtualBytes\n')


  for current_stat in Memory_Dict:
    line = ('%s,%d,%d\n') % (current_stat, Memory_Dict[current_stat]
[0],Memory_Dict[current_stat][1] )
    outfile.write(line)


  outfile.close()            # close output file


if __name__ == "__main__":
  Main()


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

I have found that the process that you want to want to monitor needs
to be started before this script is started. The script will handle
when the process disappears and set the stats to zeros.

Enjoy!

Steve



From dariusjack2006 at yahoo.ie  Mon Sep 24 11:45:46 2007
From: dariusjack2006 at yahoo.ie (http://members.lycos.co.uk/dariusjack/)
Date: Mon, 24 Sep 2007 08:45:46 -0700
Subject: To Andrey Khavryuchenko <akhavr@kds.com.ua> was: Who can develop the
	following Python script into working application ?
Message-ID: <1190648746.213074.79210@y42g2000hsy.googlegroups.com>

to Andrey Khavryuchenko <akhavr at kds.com.ua>
he said:
"
Actually, I am a python (and django) developer, looking for a
contract,
owning Nokia 770 and contacted original poster with no response.

--
Andrey V Khavryuchenko       http://a.khavr.com/
Chytach - unflood your feeds http://www.chytach.com/
Software Development Company http://www.kds.com.ua/
"

I didn't get any email from you.
Please have a look at your mailbox to verify the above.

Darius



From python.list at tim.thechases.com  Sun Sep 30 08:37:10 2007
From: python.list at tim.thechases.com (Tim Chase)
Date: Sun, 30 Sep 2007 07:37:10 -0500
Subject: Optparse and help formatting?
In-Reply-To: <87abr423hu.fsf@benfinney.id.au>
References: <mailman.1294.1191120597.2658.python-list@python.org>
	<87abr423hu.fsf@benfinney.id.au>
Message-ID: <46FF9876.8000307@tim.thechases.com>

>> I've been learning the ropes of the optparse module and have been
>> having some trouble getting the help to format the way I want.
> 
> A quick perusal of the 'optparse.py' code shows me this:
> 
> ========
> [...]
> class OptionParser([...]):
>     def __init__([...],
>                  formatter=None,
>                  [...]):
>         [...]
>         if formatter is None:
>             formatter = IndentedHelpFormatter()
>         [...]
> ========
> 
> So, the OptionParser init method accepts the help formatter as the
> 'formatter' argument, defaulting to a new instance of
> IndentedHelpFormatter.
> 
> Presumably, it's a matter of subclassing 'optparse.HelpFormatter' and
> overriding the behaviour you want to change, then passing an instance
> of your new class as the 'formatter' argument to the 'OptionParser()'
> invocation.

Ben, thanks for pointing me in the right direction.  Digging in
this code, it looks like textwrap.[fill|wrap] method calls were
what was eating my NL and munging my tabs.

While not a terribly elegant solution, as there's no easy way to
intercept the two bits I want without copying and pasting a large
bit of the format_description and format_option methods just to
change the behavior of one call to textwrap.*, I did manage to
get it working as desired.

In the event that anybody else needs the solution I hacked
together, I've pasted it below which, as Ben suggests, can be
used with

  parser = OptionParser(...
    formatter=IndentedHelpFormatterWithNL()
    )

Hope this helps somebody else too.

-tim



class IndentedHelpFormatterWithNL(IndentedHelpFormatter):
  def format_description(self, description):
    if not description: return ""
    desc_width = self.width - self.current_indent
    indent = " "*self.current_indent
# the above is still the same
    bits = description.split('\n')
    formatted_bits = [
      textwrap.fill(bit,
        desc_width,
        initial_indent=indent,
        subsequent_indent=indent)
      for bit in bits]
    result = "\n".join(formatted_bits) + "\n"
    return result

  def format_option(self, option):
    # The help for each option consists of two parts:
    #   * the opt strings and metavars
    #   eg. ("-x", or "-fFILENAME, --file=FILENAME")
    #   * the user-supplied help string
    #   eg. ("turn on expert mode", "read data from FILENAME")
    #
    # If possible, we write both of these on the same line:
    #   -x    turn on expert mode
    #
    # But if the opt string list is too long, we put the help
    # string on a second line, indented to the same column it would
    # start in if it fit on the first line.
    #   -fFILENAME, --file=FILENAME
    #       read data from FILENAME
    result = []
    opts = self.option_strings[option]
    opt_width = self.help_position - self.current_indent - 2
    if len(opts) > opt_width:
      opts = "%*s%s\n" % (self.current_indent, "", opts)
      indent_first = self.help_position
    else: # start help on same line as opts
      opts = "%*s%-*s  " % (self.current_indent, "", opt_width, opts)
      indent_first = 0
    result.append(opts)
    if option.help:
      help_text = self.expand_default(option)
# Everything is the same up through here
      help_lines = []
      for para in help_text.split("\n"):
        help_lines.extend(textwrap.wrap(para, self.help_width))
# Everything is the same after here
      result.append("%*s%s\n" % (
        indent_first, "", help_lines[0]))
      result.extend(["%*s%s\n" % (self.help_position, "", line)
        for line in help_lines[1:]])
    elif opts[-1] != "\n":
      result.append("\n")
    return "".join(result)





From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Sep 12 07:30:14 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 12 Sep 2007 13:30:14 +0200
Subject: unexpected behavior: did i create a pointer?
In-Reply-To: <1189416604.902880.24370@g4g2000hsf.googlegroups.com>
References: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>
	<1189416604.902880.24370@g4g2000hsf.googlegroups.com>
Message-ID: <46e7cdc6$0$12298$426a74cc@news.free.fr>

neoedmund a ?crit :
> On Sep 7, 4:07 pm, gu <pistacc... at gmail.com> wrote:
(snip pb and code)
>> now, in the second "for" cycle and in functionA() i only 'touch' copyOfA
>> (altering it). as i don't touch the variable "a", i expect it not to be
>> affected by any change, but copyOfA acts like a pointer to a and
>> altering copyOfA's values result in altering the values of "a", so the
>> result that i expect is:
(snip)
> no language act like want you tought, or the assignment operation will
> be too expensive.

IIRC, php4 was doing copies for arrays...


From kyosohma at gmail.com  Thu Sep 13 09:26:33 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 13 Sep 2007 06:26:33 -0700
Subject: wxstyledtextctrl and xml markup
In-Reply-To: <mailman.478.1189682613.2658.python-list@python.org>
References: <mailman.478.1189682613.2658.python-list@python.org>
Message-ID: <1189689993.338662.267340@k79g2000hse.googlegroups.com>

On Sep 13, 6:23 am, OpenPavilion Team <openpavil... at openpavilion.org>
wrote:
> Hello community,
>
> I want to create an editor for a self defined xml markup language. I want to
> use wxpython with wxstyledtextctrl and I have looked around at yellowbrain
> site, but there are no examples. I also watched the styledtextctrl examples
> with wxpython 2.8.4.
>
> What I am looking for is an example of how to do the autocompletion part for
> the styledtextctrl based on my self defined XML language.
>
> example:
> <profile>
>      <connection></connection>
>      <company>
>           <person></person>
>      </company>
>      [...]
> </profile>
>
> Since I don't know styledtextctrl, I fear that I am about to write a complex
> handler for the autocompletion part, whereas there could be some easy to use
> features built into styledtextctrl. My problem is that I don't want to
> externalize the grammar of the XML instead of coding it inside the
> autocompletion handler.
>
> Are there any examples for wxstyledtextctrl, xml and autocompletion ?
>
> Regards
> Pavilion
> --
> View this message in context:http://www.nabble.com/wxstyledtextctrl-and-xml-markup-tf4435096.html#...
> Sent from the Python - python-list mailing list archive at Nabble.com.

The demo for the StyledTextCtrl_2 mentions something about
autocomplete in the code. Not sure what it's talking about though. The
docs for it seem to link to Scintilla, so reading up on Scintilla's
usage would probably be valuable.

The wiki has one recipe on it for this control:
http://wiki.wxpython.org/Using_Python_Regular_Expressions_with_StyledTextCtrl

I highly recommend the wxPython mailing list. Right now it is down
(see their website), but when it's back up (check their website for
news), that's where I'd post this question if no one else here
answers.

Mike




From m.n.summerfield at googlemail.com  Tue Sep 25 07:25:39 2007
From: m.n.summerfield at googlemail.com (Mark Summerfield)
Date: Tue, 25 Sep 2007 11:25:39 -0000
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <fdaqdk$lvk$1@gemini.csx.cam.ac.uk>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<fdaqdk$lvk$1@gemini.csx.cam.ac.uk>
Message-ID: <1190719539.721683.282550@50g2000hsm.googlegroups.com>

On 25 Sep, 12:11, Jeremy Sanders <jeremy
+complangpyt... at jeremysanders.net> wrote:
> Mark Summerfield wrote:
> > If there is positive feedback I will submit the PEP to the reviewers,
> > so if you think it is a good idea please say so. (I'm sure that if you
> > _don't_ like it you'll tell me anyway:-)
>
> It would be nice to have the ability to use numerical indexes and the key,
> but I don't think they should share the same methods.

They don't; you use [] for key index and key(), value(), or item() for
index access.

> A useful use case would be to make a LRU (least recently used) dictionary,
> where the keys are time-based (e.g. an incrementing counter). You should be
> able to identify the least recently used object for discarding by just
> accessing the last item in the dictionary.

You could do that with a sorteddict simply by using datetime.date
objects or timestamp strings for keys. You could get the first or last
item (no matter what its key). For example:

d = sorteddict({1200:"lunch", 1100:"elevensies", 1600:"tea",
1900:"dinner"})
d.items()
[(1100, 'elevensies'), (1200, 'lunch'), (1600, 'tea'), (1900,
'dinner')]
d.item(0), d.item(-1)
((1100, 'elevensies'), (1900, 'dinner'))

So you could remove the last item using d.delete(-1).

> By the way, I think a LRU cache dictionary would be a great addition to the
> standard library.
>
> Is there any speed advantage from implementing the sorteddict as a red-black
> tree or something similar in C?

I'm sure that a C-based implementation using red-black or AVL trees or
skiplists would be faster, but right now I'm just trying to get an
acceptable API.

Corrections to my original PEP:

   value(index : int) -> value # I incorrectly had the return value as
key

Also, now in the second example I use a tuple of string, int ID rather
than strings.

> Jeremy
>
> --
> Jeremy Sandershttp://www.jeremysanders.net/




From luojiang2 at tom.com  Tue Sep  4 03:44:16 2007
From: luojiang2 at tom.com (Ginger)
Date: Tue, 4 Sep 2007 15:44:16 +0800
Subject: how to get a formatted string?
References: <eeednfMnn5paIkHbnZ2dnUVZ_sGvnZ2d@trueband.net>
	<46DCD51B.7040508@v.loewis.de>
Message-ID: <006301c7eec7$654a9e00$4de1a8c0@amd.com>

like format function in Visual Basic, 
format("##.##%",0.3456) ==>>  34.56%

From Shawn at Milochik.com  Wed Sep 12 06:42:09 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Wed, 12 Sep 2007 06:42:09 -0400
Subject: Difference between two times (working ugly code, needs polish)
In-Reply-To: <1189587589.085002.34000@19g2000hsx.googlegroups.com>
References: <mailman.405.1189543618.2658.python-list@python.org>
	<13ee01cfc7f4be2@corp.supernews.com>
	<2dc0c81b0709111420r453ac15av6c7aa19473785080@mail.gmail.com>
	<fc73nf$gcq$1@sea.gmane.org>
	<mailman.421.1189557069.2658.python-list@python.org>
	<1189587589.085002.34000@19g2000hsx.googlegroups.com>
Message-ID: <2dc0c81b0709120342n49195770uf4536e7903f33af3@mail.gmail.com>

> Just to be picky - your function returns the number of days between
> two dates, but it's called isOld, which looks like it should return a
> boolean.  i.e.  it looks like it would be used as:
>
> if not isOld(auctionDate, currentTime):
>     checkForBid()
>
> rather than how I assume it is used:
>
> if isOld(auctionDate, currentTime) <= 10:
>     checkForBid()
>
> I'd call it daysDiff or something similar, or make it more specific so
> that it works like the first block of code above:

You're absolutely right; I started writing it with one purpose in mind
and changed it midstream. I actually renamed it yesterday to dayDiff.
;o)

Shawn


From fakeaddress at nowhere.org  Thu Sep 27 02:15:49 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Thu, 27 Sep 2007 06:15:49 GMT
Subject: database persistence with mysql, sqlite
In-Reply-To: <fdfdms$vt7$2@lust.ihug.co.nz>
References: <1190502677.970811.181100@22g2000hsm.googlegroups.com>
	<mailman.993.1190636458.2658.python-list@python.org>
	<1190650748.590245.221490@n39g2000hsh.googlegroups.com>
	<HSnKi.35782$RX.34622@newssvr11.news.prodigy.net>
	<fdd5dg$o0o$4@lust.ihug.co.nz>
	<NnFKi.2654$6p6.417@newssvr25.news.prodigy.net>
	<fdfdms$vt7$2@lust.ihug.co.nz>
Message-ID: <pUHKi.37152$RX.7247@newssvr11.news.prodigy.net>

Lawrence D'Oliveiro wrote:
> Bryan Olson wrote:
> 
>> Lawrence D'Oliveiro wrote:
>>> In Bryan Olson wrote:
>>>
>>>> coldpizza wrote:
>>>>> It turned out that the method above ('SELECT * FROM TABLE LIMIT L1,
>>>>> L2') works ok both with mysql and sqlite3, therefore I have decided to
>>>>> stick with it until I find something better. With Sqlite3 you are
>>>>> supposed to use LIMIT 10 OFFSET NN, but it also apparently supports
>>>>> the mysql syntax (LIMIT NN, 10) for compatibility reasons.

>>>> A more reliable form is along the lines:
>>>>
>>>>      SELECT keyfield, stuff
>>>>      FROM table
>>>>      WHERE keyfield > ?
>>>>      ORDER BY keyfield
>>>>      LIMIT 10
>>>>
>>>> With the right index, it's efficient.

>>> But that involves keeping track of the right starting keyfield value for
>>> the next batch of records, which is complicated and nontrivial.

>> We write the link so that the browser will send back the parameter we
>> need. If the largest keyfield value on the page is
>> "Two-Sheds" the link might read:
>>
>> <A HREF="http://rfh.uk/tablnext.cgi?start=Two-Sheds">Next</A>
> 
> That's assuming keyfield is a) unique, 

Exactly; that was was the idea behind the name choice. The
method extends to multi-column keys, so it is generally
applicable.

> and b) a relevant ordering for
> displaying to the user.

That's a nice-to-have, but not required.

>> Keeping a cursor with pending data across HTTP requests is
>> a world of hurt.
> 
> "limit offset, count" avoids all that.

It can be stateless, but then it is unreliable. Here's an
example with Python 2.5:


import sqlite3

db = sqlite3.connect(":memory:")

# Simple table, an integer and the hex for that integer
db.execute(
   "CREATE TABLE numbers (num INTEGER PRIMARY KEY, hex TEXT)")

# Start with 10-29 in the table
for i in range(10, 30):
     db.execute("INSERT INTO numbers VALUES (?, ?)", (i, hex(i)))


# Print 4 records starting at offset
def next4(offset):
     cur = db.execute(
       "SELECT * FROM numbers LIMIT 4 OFFSET ?",
       (offset,))
     for x in cur:
         print x


# Walk the table with LIMIT and OFFSET

next4(0)   # Good, prints 10-13
next4(4)   # Good, prints 14-17

# Another transaction inserts new records
for i in range(0, 4):
     db.execute("INSERT INTO numbers VALUES (?, ?)", (i, hex(i)))

next4(8)   # Bad, prints 14-17 again

# Another transaction deletes records
for i in range(0, 4):
     db.execute("DELETE FROM numbers WHERE num = ?", (i,))

next4(12)  # Bad, we're missing 18-21



The method I advocated is still not the same as doing the
whole thing in a serializable transaction, but it will
return any record that stays in the table the whole time,
and will not return any record multiple times.


-- 
--Bryan


From richyjsm at gmail.com  Mon Sep 24 18:01:00 2007
From: richyjsm at gmail.com (richyjsm at gmail.com)
Date: Mon, 24 Sep 2007 22:01:00 -0000
Subject: Nested For and While Statements
In-Reply-To: <1190667172.491315.209110@y42g2000hsy.googlegroups.com>
References: <1190662087.403000.16290@g4g2000hsf.googlegroups.com>
	<1190666647.199890.174670@o80g2000hse.googlegroups.com>
	<1190667172.491315.209110@y42g2000hsy.googlegroups.com>
Message-ID: <1190671260.703917.279830@57g2000hsv.googlegroups.com>

On Sep 24, 4:52 pm, kou... at hotmail.com wrote:
> Here is my code, in the hopes that there is a reason why it isn't
> running.  Thanks guys.

[code snipped]

You're missing the closing parenthesis on the last line of the inner
for loop.

Richard



From bdesth.quelquechose at free.quelquepart.fr  Sun Sep  2 14:19:21 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 02 Sep 2007 20:19:21 +0200
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188585630.539835.242460@i38g2000prf.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<7xlkbsmqe4.fsf@ruckus.brouhaha.com>
	<1188525647.003223.199620@q5g2000prf.googlegroups.com>
	<mailman.181.1188527203.28954.python-list@python.org>
	<1188537516.622167.115080@z24g2000prh.googlegroups.com>
	<mailman.217.1188577500.28954.python-list@python.org>
	<1188585630.539835.242460@i38g2000prf.googlegroups.com>
Message-ID: <46dc74ad$0$8877$426a74cc@news.free.fr>

Russ a ?crit :
(snip)

> Frankly, Mr. Holden, I'm getting a bit tired of the clannish behavior
> here, where
> "outsiders" like me are held to a higher standard than your "insider"
> friends. I don't know who you are, nor do I care what you and your 
 > little group think about me.

If you took time to follow discussions on this group, you'd notice that 
newcomers are usually welcome. It's not a problem of being an "outsider" 
of an "insider", and there's nothing clannish (or very few, specially 
when compared to some other places on usenet), it's mostly a problem 
with your attitude. And please notice, once again, that I'm not talking 
about *you* - as a person - but about how you behave(d).

(snip)


From paul.hankin at gmail.com  Mon Sep 24 18:02:48 2007
From: paul.hankin at gmail.com (Paul Hankin)
Date: Mon, 24 Sep 2007 22:02:48 -0000
Subject: Nested For and While Statements
In-Reply-To: <1190667172.491315.209110@y42g2000hsy.googlegroups.com>
References: <1190662087.403000.16290@g4g2000hsf.googlegroups.com>
	<1190666647.199890.174670@o80g2000hse.googlegroups.com>
	<1190667172.491315.209110@y42g2000hsy.googlegroups.com>
Message-ID: <1190671368.813611.260370@w3g2000hsg.googlegroups.com>

First the bugs...

On Sep 24, 9:52 pm, kou... at hotmail.com wrote:
> ...
>     avcsasdoc = workspace + "\avcsas.txt"
> ...

There's quite a few cases like this where you don't escape
backslashes, so your filenames are mostly mangled. Here \a produces
character code 7, which is definitely wrong.

Either escape them like this: '\\avcsas.txt' or use raw strings where
backslashes aren't treated specially: r'\avcsas.txt'. You might want
to look at the 'os.path' module for help in constructing filenames.

You have a 'break' and the end of the last for loop. This has the
effect of stopping the for loop at the first iteration. Either it's a
bug, or you really didn't want a for loop!


There's also quite a few places where your code could be improved:

>         classsum = avcclass[0] + avcclass[1] + avcclass[2] +
> avcclass[3] + avcclass[4] + avcclass[5] \
>        + avcclass[6] + avcclass[7] + avcclass[8] + avcclass[9] +
> avcclass[10] \
>        + avcclass[11] + avcclass[12] + avcclass[13]

Is better written
     classsum = ''.join(avcclass[:14])


> addzeros = {1:"0", 2:"00", 3:"000", 4:"0000"}
> ...
> ... addzeros[numzeros] + lanex[i-1]

Good idea, but in this case python provides an easier alternative:
  ... '0' * numzeros + lanex[i - 1]
Or use the 'rjust' method which right-justifies a string:
  ... lanex[i - 1].rjust(5, '0')


> for i in range(1,Nscheme+1):
>      numzeros = 5 - int(len(lanex[i-1]))
>      avcclass.append(addzeros[numzeros] + lanex[i-1])
>      Nlanex.append(int(lanex[i-1])

Is better as
  for i in range(Nscheme):
      ... use i rather than i - 1

(I assume Visual Basic for loops are off by one).

In fact, this loop is even better if you just iterate over lanex
itself. Using a loop index rather than iterating directly is a common
mistake.

for lane in lanex:
    avcclass.append(lane.rjust(5, '0'))
    Nlanex.append(int(lane))

Or even better, use list comprehensions to construct your two lists
explicitly:

avcclass = [lane.rjust(5, '0') for lane in lanex]
Nlanex = [int(lane) for lane in lanex]

Note, each rewrite makes the intention of the code clearer, as well as
being shorter. This makes your code easier to read and understand, and
less buggy.


Since all you do with avcclass is sum it, combine this with the
classsum optimisation above to get

classsum = ''.join(lane.rjust(5, '0') for lane in lanex[:14])
Nlanex = [int(lane) for lane in lanex]

>    lanex = []
>    if numlanes == 2:
>        lane1 = newlist1[2:2+Nscheme]
>        lanex.append(lane1)
>        lane2 = newlist1[2+Nscheme:2+Nscheme*2]
>        lanex.append(lane2)
>    else:
>        lane1 = newlist1[2:2+Nscheme]
>        lanex.append(lane1)
>        lane2 = newlist1[2+Nscheme:2+Nscheme*2]
>        lanex.append(lane2)
>        lane3 = newlist1[2+Nscheme*2:2+Nscheme*3]
>        lanex.append(lane3)
>        lane4 = newlist1[2+Nscheme*3:2+Nscheme*4]
>        lanex.append(lane4)

List comprehensions beat copy/paste:

total_schemes = 2 if numlanes == 2 else 4
lanex = [newlist1[2 + i * Nscheme:2 + (i + 1) * Nscheme]
    for i in range(total_schemes)]

HTH, and welcome to python!

--
Paul Hankin



From mccredie at gmail.com  Tue Sep  4 13:08:57 2007
From: mccredie at gmail.com (Matimus)
Date: Tue, 04 Sep 2007 17:08:57 -0000
Subject: Python is overtaking Perl
In-Reply-To: <1188873133.137684.147260@r29g2000hsg.googlegroups.com>
References: <1188865943.238573.218750@w3g2000hsg.googlegroups.com>
	<20070904024908.b8aca60c.sulsa@gazeta.pl>
	<1188869347.102325.119830@w3g2000hsg.googlegroups.com>
	<IrCdnQkp_ds-JEHbnZ2dnUVZ_iydnZ2d@speakeasy.net>
	<1188873133.137684.147260@r29g2000hsg.googlegroups.com>
Message-ID: <1188925737.869396.316750@19g2000hsx.googlegroups.com>

> So I think we can at least say from the chart that searches combining
> the terms 'python' and 'programming' have been falling, by some
> unquantifiable amount (it don't _look_ like much!?), relative to the
> number of total searches.

I think it is the search volume relative to the total number of
searches. So, all the decline means is that the number of  searches
for "Python programming" releative to all searches done is declining.
For example, there is a larger number of people searching for things
like "Britney Spears", "Paris Hilton" and "pr0n" than there are for
Python. It is simply a sign that Google is becoming more popular with
the mainstream user, not python, ruby or even perl becoming less
popular.

Matt




From shriphanip at gmail.com  Thu Sep 27 12:48:53 2007
From: shriphanip at gmail.com (Shriphani)
Date: Thu, 27 Sep 2007 16:48:53 -0000
Subject: True of False
In-Reply-To: <1190910814.594559.30880@n39g2000hsh.googlegroups.com>
References: <1190910814.594559.30880@n39g2000hsh.googlegroups.com>
Message-ID: <1190911733.926189.228110@d55g2000hsg.googlegroups.com>


kou... at hotmail.com wrote:
> I tried writing a true and false If statement and didn't get
> anything?  I read some previous posts, but I must be missing
> something.  I just tried something easy:
>
> a = ["a", "b", "c", "d", "e", "f"]
>
> if "c" in a == True:
>      Print "Yes"
>
> When I run this, it runs, but nothing prints.  What am I doing wrong?
> Thanks.
>
> Kou

Hello,
Just try :

a = ["a","b","c","d","e","f"]
if "c" in a:
    print "yes"

That is going to work as the statement '"c" in a' itself is true. You
could try that by typing "c" in a at the interpreter.

regards,
Shriphani Palakodety



From phil at riverbankcomputing.co.uk  Sun Sep 23 17:34:54 2007
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Sun, 23 Sep 2007 22:34:54 +0100
Subject: building a GUI
In-Reply-To: <46F6CB6C.3050609@gmail.com>
References: <1190557293.266783.251480@y42g2000hsy.googlegroups.com>
	<5lnp2rF90pqqU1@mid.uni-berlin.de> <46F6CB6C.3050609@gmail.com>
Message-ID: <200709232234.54500.phil@riverbankcomputing.co.uk>

On Sunday 23 September 2007, stef mientki wrote:
> Diez B. Roggisch wrote:
> > stef mientki schrieb:
> >> Thomas Dybdahl Ahle wrote:
> >>> Den Sun, 23 Sep 2007 17:28:38 +0200 skrev stef mientki:
> >>>> yadin wrote:
> >>>>> if i were up to make a GUI chich are the advantages of choosing
> >>>>> python over matlab or java?
> >>>>
> >>>> The best is Delphi,
> >>>> second is VB,
> >>>
> >>> That sounds mostly like a personal preference :)
> >>
> >> Well I prefer Python ( because of it's OS-independancy and it's open
> >> source),
> >> but Python is really (still) much worse for GUI designs.
> >> Just compare some parameters like:
> >> - ease of use
> >> - speed of development
> >> - support of features
> >> - availability of libraries
> >> - documentation
> >
> > Sounds like PyQt for me. Best GUI-designer I know, tremendous speed in
> > development, giant sized lib that does all kinds of stuff & is
> > brilliantly designed + professional grade docus.
>
> Could well be,
> but I never looked at PyQt seriously,
> because of their weird license.

It's not weird. It's either GPL or proprietary. Your choice. That's as 
complicated as it gets.

Phil


From stefan.arentz at gmail.com  Sun Sep  9 05:19:42 2007
From: stefan.arentz at gmail.com (Stefan Arentz)
Date: 09 Sep 2007 11:19:42 +0200
Subject: Using s.sort([cmp[, key[,
	reverse]]]) to sort a list of objects based on a attribute
References: <1189173455.525144.326300@y42g2000hsy.googlegroups.com>
	<87k5r2zhd6.fsf@kip.sateh.com>
	<1189319685.273092.31830@r34g2000hsd.googlegroups.com>
Message-ID: <87ejh86vrl.fsf@kip.sateh.com>

Miki <miki.tebeka at gmail.com> writes:

> >   steps.sort(key = lambda s: s.time)
> This is why attrgetter in the operator module was invented.
> from operator import attrgetter
> ...
> steps.sort(key=attrgettr("time"))

Personally I prefer the anonymous function over attrgettr :)

 S.


From sjmachin at lexicon.net  Sat Sep 29 09:01:26 2007
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 29 Sep 2007 06:01:26 -0700
Subject: question about for cycle
In-Reply-To: <mailman.1275.1191060311.2658.python-list@python.org>
References: <mailman.1275.1191060311.2658.python-list@python.org>
Message-ID: <1191070886.287115.239520@19g2000hsx.googlegroups.com>

On Sep 29, 8:04 pm, "fdu.xia... at gmail.com" <fdu.xia... at gmail.com>
wrote:
[snip]

> And I have another question. Which is the most efficient way to check if there
> are duplicate items in a list ? The items in the list may cannot be hashed, so
> set() may not work on the list.

The following classic by Tim Peters answers the question "How do I
remove duplicate items from a list".

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52560

It should help -- provided of course that you mean "duplicates" in the
sense that two Python objects a and b are duplicates iff a == b.
If you mean duplicates in a fuzzier sense e.g. "Mao Zedong" and "Mao
Tse-Tung", the problem gets harder ...

HTH,
John



From dteslenko at gmail.com  Thu Sep 20 02:31:43 2007
From: dteslenko at gmail.com (Dmitry Teslenko)
Date: Thu, 20 Sep 2007 10:31:43 +0400
Subject: os.popen and lengthy operations
Message-ID: <91325fec0709192331i700cd172seb9534288f200424@mail.gmail.com>

Hello!
I'm using os.popen to perform lengthy operation such as building some
project from source.
It looks like this:
def execute_and_save_output( command, out_file, err_file):

import os

def execute_and_save_output( command, out_file, err_file):
	(i,o,e) = os.popen3( command )
	try:
		for line in o:
			out_file.write( line )

		for line in e:
			err_file.write( line )
	finally:
		i.close()
		o.close()
		e.close()

...
execute_and_save_output( '<some long to run command>', out_file, err_file)

Problem is that script hangs on operations that take long to execute
and have lots of output such as building scripts.


From xah at xahlee.org  Mon Sep 10 22:26:20 2007
From: xah at xahlee.org (Xah Lee)
Date: Mon, 10 Sep 2007 19:26:20 -0700
Subject: printing list containing unicode string
In-Reply-To: <1189432793.383166.156710@d55g2000hsg.googlegroups.com>
References: <1189432793.383166.156710@d55g2000hsg.googlegroups.com>
Message-ID: <1189477580.214510.212420@22g2000hsm.googlegroups.com>

This post is about some notes and corrections to a online article
regarding unicod and python.

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

by happenstance i was reading:

Unicode HOWTO
http://www.amk.ca/python/howto/unicode

Here's some problems i see:

? No conspicuous authorship. (however, oddly, it has a conspicuous
acknowledgement of names listing.) (This problem is a indirect
consequence of communism fanatism ushered by OpenSource movement)
(Originally i was just going to write to the author on some
corrections.)

?  It's very wasteful of space. In most texts, the majority of the
code points are less than 127, or less than 255, so a lot of space is
occupied by zero bytes.  

Not true. In Asia, most chars has unicode number above 255. Considered
globally, *possibly* today there are more computer files in Chinese
than in all latin-alphabet based lang.

?  Many Internet standards are defined in terms of textual data, and
can't handle content with embedded zero bytes. 

Not sure what he mean by "can't handle content with embedded zero
bytes". Overall i think this sentence is silly, and he's probably
thinking in unix/linux.

?  Encodings don't have to handle every possible Unicode
character, .... 

This is inane. A encoding, by definition, turns numbers into binary
numbers (in our context, it means a encoding handles all unicode chars
by definition). What he really meant to say is something like this:
"Practically speaking, most computer languages in western society
don't need to support unicode with respect to the language's source
file"

?  
UTF-8 has several convenient properties:
1. It can handle any Unicode code point.
...
 

As mentioned before, by definition, any Unicode encoding encodes all
unicode char set. The mentioning of above as a "convenient property"
is inane.

?  4.UTF-8 is fairly compact; the majority of code points are turned
into two bytes, and values less than 128 occupy only a single byte. 

Note here, that utf-8 is relative compact only if most of your text
are latin alphabets. If you are not a occidental men and you write
Chinese, utf-8 is comparatively inefficient. (utf-8 as one of the
Unicode encoding is probably comparatively inefficient for japanese,
korean, Arabic, or any non-latin-alphabet based langs)

Also note, the article overly focus on utf-8. Microsoft's Windows NT,
is probably the first major operating system that support unicode
throughly, and they use utf-16. For Much of America and Europe, which
are currently roughly the leader in computing, utf-8 is more efficient
in some sense (e.g. at least in disk space requirements). But consider
global computing, in particular Chinese & Japanese, utf-16 is overall
superior than utf-8.

Part of the reason, that utf-8 is favored in this article, has to do
with Linux (and unix). The reason unixes in general have choosen utf-8
instead of utf-16, is largely because unix is one motherfucking bag of
shit that it is impossible to support utf-16 without scraping a large
chuck of unix things.

PS I did not read the article in detail, but only roughly to see how
Python handle unicode because i was often confused by python's encode/
decode/unicode methods and functions.

... am gonna continue reading that article about Python specific
issues...

also note, this post is posted thru groups.google.com, and it contains
the double angled quotation mark chars. As of 2 weeks ago, it
quotation marks seems to be deleted in the process of posting, i.e.
unicode name: "LEFT-POINTING DOUBLE ANGLE QUOTATION MARK" and "RIGHT-
POINTING DOUBLE ANGLE QUOTATION MARK".  Here, i enclose the double-
angled quation mark inside a double curly quote: "  ". If inside the
double curly quote you see spaces, than that means google groups
fucked up.

References and Further readings:

? Unicode in Perl & Python
http://xahlee.org/perl-python/unicode.html

? the Journey of a Foreign Character thru Internet
http://xahlee.org/Periodic_dosage_dir/t2/non-ascii_journey.html

? Unicode Characters Example
http://xahlee.org/Periodic_dosage_dir/t1/20040505_unicode.html

? Python's unicodedata module
http://xahlee.org/perl-python/unicodedata_module.html

? Emacs and Unicode Tips
http://xahlee.org/emacs/emacs_n_unicode.html

? Java Tutorial: Unicode in Java
http://xahlee.org/java-a-day/unicode_in_java.html

? Character Sets and Encoding in HTML
http://xahlee.org/js/html_chars.html

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



From f.guerrieri at gmail.com  Mon Sep 10 08:05:37 2007
From: f.guerrieri at gmail.com (Francesco Guerrieri)
Date: Mon, 10 Sep 2007 14:05:37 +0200
Subject: less obvious "super"
In-Reply-To: <1189424762.591411.99760@d55g2000hsg.googlegroups.com>
References: <1189417830.645749.226120@d55g2000hsg.googlegroups.com>
	<Xns99A77DA03E585duncanbooth@127.0.0.1>
	<1189424762.591411.99760@d55g2000hsg.googlegroups.com>
Message-ID: <79b79e730709100505n246d9539t6c6ee0b3cca2dbfc@mail.gmail.com>

On 9/10/07, Nagarajan <naga86 at gmail.com> wrote:
>
>
>
> What's the difference b/w:
>      class A:
> and
>      class A ( object ):
>
> Thanks.
>

The first one declares an old-style class. The second one declares a new
style class.
It's better to use the new-style (always derive from object).

See
http://www.python.org/doc/newstyle.html
for further reading

francesco
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From steve at holdenweb.com  Wed Sep 19 11:47:38 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 19 Sep 2007 11:47:38 -0400
Subject: psycopg2 or pygresql?
In-Reply-To: <1190214385.994370.167750@r29g2000hsg.googlegroups.com>
References: <1190214385.994370.167750@r29g2000hsg.googlegroups.com>
Message-ID: <fcrgan$b80$1@sea.gmane.org>

exhuma.twn wrote:
> Plain and simple. What would you use?
> 
> So far I have written everything with psycopg2. One thing that annoys
> me is that I cannot easily access the column names from a query. I
> know that this is not part of the DBAPI2  so I cannot expect the model
> to suport it.
> 
Yes it is.

Execute a SELECT * FROM TABLE WHERE 1=0 and then examine 
cursor.description. This allows you to introspect on database structure.

> I quite like the "mogrify" method of psycopg2 very much. It's very
> useful for debugging.
> 
> And before someone says: "Use the DictCursor-factory to access column
> names". Yes I can do that. But a dict does not guarantee the same
> order of keys as the columns were specified in the query.
> 
See below.

> The reason: I wrote a very simple Qt-Widget (inherited from
> QTableWidget) that takes a SQL query and displays the results. And I
> would like to have the columns ordered the same way as I specified in
> the query *with* a header-label. For now I hava a method on the widget
> which takes a query, *and* a list of labels.
> 
> I can live with that though. Although it itches me.
> 
> Would pygresql solve my dilemma? Or would you rather say: "Don't use
> pygresql!"  ;)
> 
Here's a psycopg2-based session:

 >>> curs
<cursor object at 0x00B823C8; closed: 0>
 >>> curs.execute("SELECT * FROM Person WHERE 1=0")
 >>> curs.description
(('psnid', 23, None, 4, None, None, None), ('psnfirstname', 1043, None, 
50, None, None, None), ('psnlastname', 1043, None, 50, None, None, 
None), ('psndear', 1043, None, 50, None, None, None), ('psntitle', 1043, 
None, 50, None, None, None), ('psnworkphone', 1043, None, 30, None, 
None, None), ('psnworkextension', 1043, None, 20, None, None, None), 
('psnhomephone', 1043, None, 30, None, None, None), ('psnmobilephone', 
1043, None, 30, None, None, None), ('psnfaxnumber', 1043, None, 30, 
None, None, None), ('psnemailname', 1043, None, 50, None, None, None), 
('psnreferredby', 1043, None, 50, None, None, None), ('psnlocid', 23, 
None, 4, None, None, None), ('psnnotes', 1043, None, -1, None, None, None))

I believe if you use specific column names in your query they will 
appear in the order given in the query also.

I use this technique in

   http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/81189

to print arbitrary query outputs.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From bozonm at vscht.cz  Wed Sep 26 16:31:32 2007
From: bozonm at vscht.cz (Michal Bozon)
Date: Wed, 26 Sep 2007 22:31:32 +0200
Subject: Tkinter / Tk 8.5
Message-ID: <pan.2007.09.26.20.31.31.424223@vscht.cz>

Today has been released a first beta of Tk 8.5, including a Ttk
(tile) style engine, which makes possible the native look
of widgets on MS
platform, without having to install any extension.

http://wiki.tcl.tk/11075
http://sourceforge.net/mailarchive/message.php?msg_name=1190813039.46fa5d6f6a06b%40webmail.nist.gov

Is there a chance it will be included in 2.5.x, 2.6 or 3.0 ?

 -m.


From vedrandekovic at v-programs.com  Tue Sep 18 07:44:32 2007
From: vedrandekovic at v-programs.com (vedrandekovic at v-programs.com)
Date: Tue, 18 Sep 2007 04:44:32 -0700
Subject: string replace shortcut
Message-ID: <1190115872.824161.115420@w3g2000hsg.googlegroups.com>

Hello,

I am trying to replace some string with list objects:

>>> my_text1="function1 function2"
>>> from my_module_with_functions_1 import *
>>> from my_module_with_functions_2 import *

# functions in module " my_module_with_functions_1 ":
 
my_func1  it's value "function1"
 
my_func2  it's value "function2"

# functions in module " my_module_with_functions_2 ":
 
my_func100  it's value "bla bla 1"
 
my_func200  it's value "bla bla 2"

........now, we need find and replace functions from module "
my_module_with_functions_1 "  and
replace them with  functions from module " my_module_with_functions_2
"

with: my_text1.replace(items1,items2)

Result must be:

>>> print my_text1.replace(items1,items2)
bla bla 1 bla bla 2


Regards,
Vedran



From anomyo2 at gmail.com  Tue Sep 11 16:40:40 2007
From: anomyo2 at gmail.com (anton a)
Date: Tue, 11 Sep 2007 22:40:40 +0200
Subject: Compiler Python
In-Reply-To: <000001c7f4a2$307fa720$917ef560$@com>
References: <000001c7f4a2$307fa720$917ef560$@com>
Message-ID: <7e72bde20709111340x61d1812ag1070722dee59721f@mail.gmail.com>

Hello

Someone knows since as I can obtain the information detailed about the
compiler of Python? (Table of tokens, lists of productions of the
syntactic one , semantic restrictions...)

Thanks.


From lasses_weil at klapptsowieso.net  Thu Sep 13 12:29:41 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Thu, 13 Sep 2007 18:29:41 +0200
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <mailman.487.1189694503.2658.python-list@python.org>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>	<1189666095.727426.135170@o80g2000hse.googlegroups.com>	<1189685403.306218.13270@22g2000hsm.googlegroups.com>	<13eigagsuk74l55@corp.supernews.com>	<46e94623$0$30375$9b4e6d93@newsspool4.arcor-online.net>
	<mailman.487.1189694503.2658.python-list@python.org>
Message-ID: <46e96575$0$7702$9b4e6d93@newsspool2.arcor-online.net>

Eduardo O. Padoan wrote:
> On 9/13/07, Wildemar Wildenburger <lasses_weil at klapptsowieso.net> wrote:
>> because I'm trained to interpret the underscore as a synonym for one
>> space. It's not particularly beautiful, but that is probably a matter of
>> habituation. And that exact word is probably the reason why I'd still
>> use self or s (explained by a comment, because I can get very dumb if I
>> have to).
> 
> Have you worked with code using gettext functions imported as "_"?
> When I see a single underscore as a name, i18n comes to mind.
> 
> 
See? Habituation. Just what I'm saying. :)

/W


From stef.mientki at gmail.com  Sun Sep 23 14:22:12 2007
From: stef.mientki at gmail.com (stef mientki)
Date: Sun, 23 Sep 2007 20:22:12 +0200
Subject: building a GUI
In-Reply-To: <pan.2007.09.23.17.41.52@gmail.com>
References: <1190557293.266783.251480@y42g2000hsy.googlegroups.com>	<mailman.940.1190560838.2658.python-list@python.org>
	<pan.2007.09.23.17.41.52@gmail.com>
Message-ID: <46F6AED4.2000004@gmail.com>

Thomas Dybdahl Ahle wrote:
> Den Sun, 23 Sep 2007 17:28:38 +0200 skrev stef mientki:
>   
>> yadin wrote:
>>
>>     
>>> if i were up to make a GUI chich are the advantages of choosing python
>>> over matlab or java?
>>>
>>>       
>> The best is Delphi,
>> second is VB,
>>     
>
> That sounds mostly like a personal preference :)
>
>   
Well I prefer Python ( because of it's OS-independancy and it's open 
source),
but Python is really (still) much worse for GUI designs.
Just compare some parameters like:
- ease of use
- speed of development
- support of features
- availability of libraries
- documentation
> I would certainly suggest Python very much for any kind of gui.
>   
I agree to that ;-)

cheers,
Stef
>   



From david at boddie.org.uk  Sun Sep 30 14:15:33 2007
From: david at boddie.org.uk (David Boddie)
Date: Sun, 30 Sep 2007 20:15:33 +0200
Subject: How to display a videostream in the PyQt GUI by a efficient way
Message-ID: <200709302015.33842.david@boddie.org.uk>

On Sun Sep 30 09:10:40 CEST 2007, Kivilaya wrote:

>    I read the method in the given link and learn a lot from it. I'll
> try to display the data inside a QWidget directly instead of the
> current way. But I still have a question, is there any way to make the
> displaying of RGB data in a QWidget more quickly.

You can set certain flags to ensure that the widget isn't being updated
or painted on too often. See the WA_OpaquePaintEvent and
WA_NoSystemBackground flags:

http://www.riverbankcomputing.com/Docs/PyQt4/html/qt.html#WidgetAttribute-enum

The problem may be related to the conversion process rather than the time
it takes to display the image. You mentioned that you were obtaining the
images as PIL Image objects, but these need to be converted to QImage or
QPixmap objects, so the raw data from the camera is being converted at
least twice before it reaches the screen!

>    In fact, my work is to make a gui for displaying my
> partners'experimental results to our teacher, the source video is no
> need to be encoded to mpeg or h264 format, so I get the video from
> camera in the raw format and display them without encodeing or
> decoding process.

Which operating system is this on? (I'm guessing that it's Windows because
you mentioned the videocapture module.)

>    As my partners will do some experiments on the raw data, maybe add
> a mark to label some area in the current frame, or change some part of
> it, I get every frame as a picture before they process the picture
> data, and then display the picture after their process.

So, do you intend to process the video and store it in a file, or do you
want to make these changes on a live video stream?

> But displaying the pictures one by one in my current way is so slow,
> I'm afraid that time spend on it is too long and the displaying of
> results will be discontinuous. So I think maybe there is another way
> to show these pictures.

Is there another way of getting the data from the camera? Perhaps the
author of videocapture has some ideas that can help you speed up the
conversion and rendering process. Maybe the Device.getBuffer() function
will provide data that can be passed directly to QPixmap.loadFromData().

David


From rowen at cesmail.net  Wed Sep 12 15:08:33 2007
From: rowen at cesmail.net (Russell E. Owen)
Date: Wed, 12 Sep 2007 12:08:33 -0700
Subject: An ordered dictionary for the Python library?
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<13efnmi4n959a59@corp.supernews.com>
Message-ID: <rowen-59A5BB.12083312092007@gnus01.u.washington.edu>

In article <13efnmi4n959a59 at corp.supernews.com>,
 Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> wrote:

> On Wed, 12 Sep 2007 07:33:45 +0000, Mark Summerfield wrote:
> 
> > I feel that Python lacks one useful data structure: an ordered
> > dictionary.
> > 
> > I find such data structures v. useful in C++.
> [snip]
> 
> 
> Personally, I've never missed an ordered dict. What do people use them 
> for?
> 
> In fact, I'm not sure what people mean by ordered dicts. I assume they 
> mean the keys are ordered, not the values. But ordered by what? Insertion 
> order? Modification order? Alphabetical order?

Opinions vary, but I think of it this way:
- A sorted dict keeps its keys sorted. This has an obvious alternative 
just sort the keys later (though I can imagine cases where it would be 
nicer not to).

- An ordered dict remembers the order of insertion. This is useful when 
you want to retain the order of insertion yet you also want fast lookup 
of individual items. Unlike a sorted dict, there is no trivial 
alternative (though you can argue about "trivial") and I really wish 
there was. There are several free versions available.

-- Russell


From steve at REMOVE-THIS-cybersource.com.au  Fri Sep  7 21:31:46 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sat, 08 Sep 2007 01:31:46 -0000
Subject: Generating a unique identifier
References: <13e2fgbbpsatm39@corp.supernews.com>
	<7x3axq7a8a.fsf@ruckus.brouhaha.com>
Message-ID: <13e3us269f59s7a@corp.supernews.com>

On Fri, 07 Sep 2007 08:42:45 -0700, Paul Rubin wrote:

> Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> writes:
>> def unique_id():
>>     n = 1234567890
>>     while True:
>>         yield n
>>         n += 1
> 
> unique_id = itertools.count(1234567890)

Sweet!

I really must make itertools second-nature. I always forget it.

 
>> which is easy enough, but I thought I'd check if there was an existing
>> solution in the standard library that I missed. Also, for other
>> applications, I might want them to be rather less predictable.
> 
> def unique_id():
>    return os.urandom(10).encode('hex')

Any time I see something using a random number to generate IDs, I worry 
about collisions. Am I being paranoid? (But even paranoids write code 
with bugs...)


Here's something which is a little less predictable than a straight 
counter:

def unpredictable_counter(n=12345678):
    while True:
        n += random.randint(1, 68)
        yield n

def more_unpredictable_counter(n=1234567):
    uc = unpredictable_counter(n)
    pool = []
    while True:
        if not pool:
            pool = [None]*99
            for i in range(99):
                pool[i] = uc.next()
            random.shuffle(pool)
        yield pool.pop()




-- 
Steven.


From bdesth.quelquechose at free.quelquepart.fr  Thu Sep 20 04:00:41 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 20 Sep 2007 10:00:41 +0200
Subject: Odd files; just left behind?
In-Reply-To: <46F191DF.7000908@jessikat.plus.net>
References: <mailman.760.1190205969.2658.python-list@python.org>
	<878x725ts7.fsf@pobox.com> <46F191DF.7000908@jessikat.plus.net>
Message-ID: <46f2bd9b$0$20143$426a74cc@news.free.fr>

Robin Becker a ?crit :
> John J. Lee wrote:
> 
>> Robin Becker <robin at reportlab.com> writes:
>>
>>> I see a folder .python-eggs in my home directory on one of our servers
>>> with various .so files
>>>
>>> ~/.python-eggs/MySQL_python-1.2.2-py2.3-freebsd-6.1-SECURITY-i386.egg-tmp/_mysql.so 
>>>
>>>
>>> are these just left behind from some install process?
>>
>>
>> Ah, it's about the resource extraction feature of setuptools.  It's
>> possible for zipped eggs to contain resources that have to be
>> extracted to the filesystem.  It puts them in the directory you saw
>> (or somewhere else -- see the docstring in my other reply).
>>
>> http://peak.telecommunity.com/DevCenter/PkgResources#resource-extraction
>> http://peak.telecommunity.com/DevCenter/setuptools#automatic-resource-extraction 
>>
> 
> .....
> Thanks John, but why not clean up?
> 
Does it needs to be "cleaned up" ? .so files (shared libs) *need* to be 
extracted from the egg to be usable. Where they are extracted is IIRC 
configurable...


From ldo at geek-central.gen.new_zealand  Mon Sep 24 03:50:02 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 24 Sep 2007 19:50:02 +1200
Subject: Would Anonymous Functions Help in Learning Programming/Python?
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<zOdJi.35091$RX.24066@newssvr11.news.prodigy.net>
Message-ID: <fd7q7a$me4$3@lust.ihug.co.nz>

In message <zOdJi.35091$RX.24066 at newssvr11.news.prodigy.net>, Bryan Olson
wrote:

> The keyword "lambda" sucks. ...
> 
> Alonzo Church's calculus used the *symbol*.

The keyword was popularized by LISP, and hence adopted by most other
languages to copy the concept.

In my view, it's no worse than using "=" for assignment instead of equality.

> "function" would be a much better keyword.

As used that way in JavaScript.


From danielk at featherbrain.net  Tue Sep 11 10:07:27 2007
From: danielk at featherbrain.net (Daniel Klein)
Date: Tue, 11 Sep 2007 14:07:27 GMT
Subject: pipes
References: <1189480540.812171.285820@r34g2000hsd.googlegroups.com>
Message-ID: <mv7de3dg9qsdakojf866ggeg0h3f7hnmt4@4ax.com>

On Mon, 10 Sep 2007 20:15:40 -0700, yagyala <mbrown at phys.ksu.edu>
wrote:

>Hi. I'm rtying to use pipes to communicate between a python GUI and a
>spawned C++ program. I prefer not to use forking because the app may
>be run on windows, where forking isn't supported. Roughly what I'm
>doing is:
>
>(r,w) = os.pipe()
>spawnl(P_WAIT, 'tool.exe', ' ', message, str(w))
>close(w)
>print os.read(r, 1000)
>
>In c++ ,
>...
>int main(int argc, char** argv)
>{
>
>}

The 'subprocess' module provides an easier interface imo, eg:

process = subprocess.Popen('tool.exe', stdin=subprocess.PIPE,      
               stdout=subprocess.PIPE, universal_newlines=true)
(self.outstream, self.instream) = (process.stdout, process.stdin)

Daniel Klein


From imageguy1206 at gmail.com  Fri Sep  7 07:35:34 2007
From: imageguy1206 at gmail.com (imageguy)
Date: Fri, 07 Sep 2007 04:35:34 -0700
Subject: py2exe - change name of exe created
Message-ID: <1189164934.705547.156670@r34g2000hsd.googlegroups.com>

I have a setup script like this;

setup(windows = [{"script":"myprogram.py",
	           "icon_resources":[(0,"nabbitt.ico")],
	            "other_resources": [(24,1,manifest)]}
],
		name = "Nabbitt ver 0.1",
		data_files = [("",rootdata)],
		zipfile = None,
		options = {"py2exe": {
						"compressed" : 1,
						"dll_excludes": ["w9xpopen.exe"],  #should also exclude
MSVCR71.dll
						"bundle_files": 3             # 1=Single .exe, 2=.exe with
pythonXX.dll
						}
						},
		)



From daniel.j.larsson at gmail.com  Wed Sep  5 13:31:48 2007
From: daniel.j.larsson at gmail.com (Daniel Larsson)
Date: Wed, 5 Sep 2007 19:31:48 +0200
Subject: Soemthing wrong w/ urllib module or something.
In-Reply-To: <eb79828c0709051010n52737c59v34244752fa91631e@mail.gmail.com>
References: <eb79828c0709021754h17c89a52ld36990c4e2a535c@mail.gmail.com>
	<46DBC5CB.3040007@timgolden.me.uk>
	<eb79828c0709030622q47caf860n58e69a6c888c8e4d@mail.gmail.com>
	<46DC0BA6.50606@timgolden.me.uk>
	<eb79828c0709030630y6ddbf077j429e8003242bf0d5@mail.gmail.com>
	<eb79828c0709051010n52737c59v34244752fa91631e@mail.gmail.com>
Message-ID: <2bfa72fa0709051031o3cb4230eke7b285dca1a77c26@mail.gmail.com>

Are you using http proxying when you browse to the server? Have you tried to
do

$ curl http://DOMAINHERE/

If that works, connecting with a plain socket should work too. Otherwise, I
believe urllib has support for a proxying server, check the docs.

On 9/5/07, Lamonte Harris <pyth0nc0d3r at gmail.com> wrote:
>
> Anyone got an answer for this?
>
> On 9/3/07, Lamonte Harris <pyth0nc0d3r at gmail.com> wrote:
> >
> > Yeah I can browse it like normal.  For some reason though my News System
> > that worked like a charm just stopped working also.  Is there any
> > alternatives that I could try to use to POST to a PHP script?
> >
> > On 9/3/07, Tim Golden <mail at timgolden.me.uk > wrote:
> > >
> > > [Tim Golden]
> > > >> To do the obvious, can you open a socket connection
> > > >> to the domain you're using?
> > > >>
> > > >> <code>
> > > >> from socket import socket
> > > >> socket ().connect (("DOMAINHERE", 80))
> > > >>
> > > >> </code>
> > > >>
> > > >> or does it give you the same error?
> > >
> > > [Lamonte Harris]
> > > > Yeah I basically got the same error.
> > > >
> > > > Traceback (most recent call last):
> > > >   File "<stdin>", line 1, in <module>
> > > >   File "<string>", line 1, in connect
> > > > socket.error: (10053, 'Software caused connection abort')
> > >
> > > OK, then *something's* blocking access to that host (at least)
> > > on port 80. Can you browse the web normally from this machine?
> > > In particular, can you browse to that site ("DOMAINHERE")?
> > >
> > > TJG
> > >
> >
> >
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
-------------- next part --------------
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From mauro.tiz at gmail.com  Thu Sep 27 09:48:15 2007
From: mauro.tiz at gmail.com (mauro)
Date: Thu, 27 Sep 2007 06:48:15 -0700
Subject: PyObject_CallObject: difference between functions and class methods
Message-ID: <1190900895.635795.262350@y42g2000hsy.googlegroups.com>

Hi all!

I am trying to call within a C extension a Python function provided as
an argument by the user with: PyObject_Call(). The C extension should
work also if the user supplies a class method, but in this case I am
getting an error. Do I need to explicitly pass 'self' as an argument
to PyObject_Call()? If so, how can I do that?

Now, I am using:

if ((tmp_args = PyTuple_New(1)) == NULL)
		PyErr_SetString( PyExc_ReferenceError, "attempt to access a null-
pointer" );
PyTuple_SetItem(tmp_args, 0, paramlist);

to create the tuple required by PyObject_Call(), but I have no idea on
how to add a reference to 'self'.

Here is what I would like to obtain:

##
import mymodule

def myfunc(x):
	# Do something
	return [z]

class MyClass:
	def mymethod(self, x):
		# Do something
		return z
	def runme(self):
		mymodule.main(myfunc) # This will work
		mymodule.main(self.mymethod) # This will not work (Segmentation
fault)

x = MyClass()
x.runme()
##

Thanks in advance.

Mauro



From byte8bits at gmail.com  Wed Sep 26 11:13:15 2007
From: byte8bits at gmail.com (brad)
Date: Wed, 26 Sep 2007 11:13:15 -0400
Subject: Script to extract text from PDF files
In-Reply-To: <mailman.1114.1190818547.2658.python-list@python.org>
References: <mailman.1114.1190818547.2658.python-list@python.org>
Message-ID: <fddsud$fnv$1@solaris.cc.vt.edu>

David Boddie wrote:
> There's a little information on that online:
>   http://www.glyphandcog.com/textext.html

Thanks, I'll read that.

> Just because inserting and encoding is well documented doesn't mean that the
> reverse processes are easy. :-/

Boy, that's an understatement... most of the PDF tools (in fact almost 
all) I come across write  PDF docs... they output things to PDF. It's 
like anyone can generate PDF files... it's dead simple, but extracting 
text out of them in an accurate, reliable manner is much more difficult.

> Maybe you should look at the source code for pdftotext, if that's an option.

I'm not sure it's opensource/free software with source available, but 
I'll look into that.

> Can I suggest that you approach one or more authors of the existing Python
> PDF solutions and work with them on this? There are at least four PDF parsers
> written in Python out there.

I appreciate that suggestion, but again, none of the current solutions 
I've seen and tried, extract text from pdf documents. I'd love to be 
proven wrong on this point. So if one of those four current PDF 
solutions you mention do that, please let me know.

Thanks,

Brad


From joel.hedlund at gmail.com  Tue Sep 25 18:11:13 2007
From: joel.hedlund at gmail.com (Joel Hedlund)
Date: Wed, 26 Sep 2007 00:11:13 +0200
Subject: What is a good way of having several versions of a python module
	installed in parallell?
In-Reply-To: <mailman.1054.1190736712.2658.python-list@python.org>
References: <fdai0b$7iv$1@news.lysator.liu.se>	<5ls95aF9pq3gU1@mid.uni-berlin.de>
	<mailman.1054.1190736712.2658.python-list@python.org>
Message-ID: <fdborn$h5q$1@news.lysator.liu.se>

First of all, thanks for all the input - it's appreciated.

> Otherwise, three words:
> 
>   test driven development

Do you also do this for all the little stuff, the small hacks you just 
whip together to get a particular task done? My impression is that doing 
proper unittests adds a lot of time to development, and I'm thinking 
that this may be a low return investment for the small programs.

I try to aim for reusability and generalizability also in my smaller 
hacks mainly as a safeguard. My reasoning here is that if I mess up 
somehow, sooner or later I'll notice, and then I have a chance of making 
realistic damage assessments. But even so, I must admit that I tend to 
do quite little testing for these small projects... Maybe I should be 
rethinking this?

Cheers!
/Joel


From Caseyweb at gmail.com  Thu Sep 27 13:14:10 2007
From: Caseyweb at gmail.com (Casey)
Date: Thu, 27 Sep 2007 17:14:10 -0000
Subject: getopt with negative numbers?
Message-ID: <1190913250.198794.269530@k79g2000hse.googlegroups.com>

Is there an easy way to use getopt and still allow negative numbers as
args?  I can easily write a workaround (pre-process the tail end of
the arguments, stripping off any non-options including negative
numbers into a separate sequence and ignore the (now empty) args list
returned by getopt, but it would seem this is such a common
requirement that there would be an option to treat a negative value as
an argument.  Note that this is only a problem if the first non-option
is a negative value, since getopt stops processing options as soon as
it identifies the first argument value.

Alternatively, does optparse handle this?  I haven't used optparse (I
know it is more powerful and OO, but you tend to stick with what you
know, especially when it is part of my normal python programming
template), but if it handles negative numbers I'm willing to learn it.



From gagsl-py2 at yahoo.com.ar  Mon Sep 17 04:17:31 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 17 Sep 2007 01:17:31 -0700
Subject: Try this
In-Reply-To: <1190008502.986300.286280@22g2000hsm.googlegroups.com>
References: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>
	<13eqsdfsfvsa16f@corp.supernews.com>
	<1189969529.652871.19280@50g2000hsm.googlegroups.com>
	<mailman.621.1189970593.2658.python-list@python.org>
	<1189979679.969074.216490@y42g2000hsy.googlegroups.com>
	<1189981681.745195.18130@y42g2000hsy.googlegroups.com>
	<1189983233.709832.124290@19g2000hsx.googlegroups.com>
	<1189984913.956999.163100@n39g2000hsh.googlegroups.com>
	<1189990689.259451.232570@g4g2000hsf.googlegroups.com>
	<mailman.634.1189996018.2658.python-list@python.org>
	<1190008502.986300.286280@22g2000hsm.googlegroups.com>
Message-ID: <1190017051.877316.72330@r29g2000hsg.googlegroups.com>

On 17 sep, 02:55, "mensana... at aol.com" <mensana... at aol.com> wrote:
> On Sep 16, 9:27?pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>
> > En Sun, 16 Sep 2007 21:58:09 -0300, mensana... at aol.com  
> > <mensana... at aol.com> escribi :
>
> > >> I'm eagerly awaiting publication of your professional specification
> > >> for correctly detecting the encoding of an arbitrary stream of
> > >> bytes
>
> > > The very presence of an algorithm to detect encoding is a bug.
> > > Files with they .txt extension should always be treated as ANSI
> > > even if they contain binary data.
>
> > Why ANSI?
>
> Because that's the absence of encoding?

Are you kidding?

> > Because it's convenient to *you*?
>
> No, it's ANSI unless told otherwise.

Oh, yes, it's a joke surely.
(Anyway, *which* ANSI standard? AFAIK, the Windows character set has
never been standardized by ANSI).

> > What about the rest of the world that don't speak
> > English or even worse, don't use the Latin alpabet?
>
> When the rest of the world creates the next
> generation of computers, THEY can chosse the
> defaults.

No comments.

> > What do you mean by "binary data"?
>
> 8-bit, ASCII is only 7-bit.

Being "binary" as opposed to "text" has nothing to do with the number
of bits. "?Ol?!" is text, and contains characters outside the ASCII
set. A signal with range 0-63 can be encoded into 6 bits, but it's
binary data, not text.

> > Notepad is not interpreting the file as  
> > "binary", it's text,
>
> And will treat non-ASCII data as if it were ASCII.

I think you were complaining about the opposite situation.

> > but interpreted using the wrong encoding.
>
> So that's not a serious bug? To decide that a file
> is Unicode despite the absence of the appropriate
> markers?

Which are "the appropiate markers"? A BOM is not always required, and
Notepad supported Unicode even before the BOM was invented.
Please redirect your bug reports to bugs at microsoft.com

> > As every character goes into the same code block the heuristics concludes  
> > that the text is some Estern language encoded in UTF16.
>
> But...but...Notepad doesn't have a UTF16 option.

What it calls "Unicode" is in fact UTF16, or UCS2 on some previous
Windows versions.

> > This is the "Well you are speed" phrase interpreted as UTF16:  
> > u'\u6557\u6c6c\u7920\u756f\u6120\u6572\u7320\u6570\u6465'
>
> How can you tell from that that it's UTF16? If there's
> something stored in addition to those 18 bytes, you're
> being misleading.

*I* can tell it's not, but Notepad (which presumibly calls
IsTextUnicode) cannot, and I can't blame it given a so small sample of
less than 20 bytes.

> > > Notepad should never be
> > > allowed to try to decide what the encoding is if the the open
> > > dialog has the encoding set to ANSI.
>
> > I'm using notepad.exe version 5.1.2600.2180 (XP SP2 fully updated) and  
> > that's exactly what happens. I have to explicitely select Unicode in order  
> > to see those Han characters.
>
> So which is worse, you having to tell it that it's
> Unicode or Notepad deciding on its own that a file
> is Unicode when it isn't.

I don't know, and I don't care, and I don't use Notepad.

--
Gabriel Genellina



From carsten at uniqsys.com  Wed Sep 19 10:58:56 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Wed, 19 Sep 2007 10:58:56 -0400
Subject: Find the ID, but how to select/copy the whole string by ID?
In-Reply-To: <79b79e730709190741i2deb95c8m2982b3201a3fc4be@mail.gmail.com>
References: <1190209195.493784.133340@q3g2000prf.googlegroups.com>
	<79b79e730709190741i2deb95c8m2982b3201a3fc4be@mail.gmail.com>
Message-ID: <1190213936.3371.34.camel@dot.uniqsys.com>

On Wed, 2007-09-19 at 16:41 +0200, Francesco Guerrieri wrote:
> On 9/19/07, Leon <mingliang2000 at gmail.com> wrote:
> > stringID = str(raw_input('Enter the string ID : '))
> > file = open('strings.txt')
> > sourcefile = file.read()
> > file.close()
> > sourcefile.find (stringID)
> >
> > but how can I select and copy the specific string from <str> to </str>
> > with id I input?
> 
> If the file you are parsing is in xml, there are many parser out there
> which can help you (this is discussed very often on this list, even
> today) .
> 
> If the format is very simple and you really want to do it by hand, you
> could do something like:
> 
> stringID = raw_input('Enter the string ID:')
> for line in open('strings.txt'):
>     if line.find(stringID) > -1:
>         print 'Found!'

Using find() for XML parsing is like using a machine gun to pound a nail
into a wall. It is absolutely the wrong tool for the job. If the input
file looks something like this:

<str id="123">blah</str>
<str id="12">spam</str>

, then looking for id 12 is going to match on the wrong ID. Besides,
that code only tells you where something that looks like the ID you're
looking for is in the file. There is no guarantee that the match
actually occurs inside an ID attribute. It also doesn't help in
retrieving the text contents of the <str> tag that has this ID.

If your input is an XML file, using an actual XML parser is the only
correct solution.

-- 
Carsten Haese
http://informixdb.sourceforge.net




From http  Tue Sep  4 02:42:56 2007
From: http (Paul Rubin)
Date: 03 Sep 2007 23:42:56 -0700
Subject: Does shuffle() produce uniform result ?
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
	<mailman.243.1187955760.32294.python-list@python.org>
	<tooru_honda-7C82D1.10432725082007@wvnews01.netvigator.com>
	<tooru_honda-58C552.20355225082007@wvnews01.netvigator.com>
	<tooru_honda-978B9E.11304526082007@wvnews01.netvigator.com>
	<slrnfdnojg.inr.apardon@rcpc42.vub.ac.be>
	<7xejhfbsjo.fsf@ruckus.brouhaha.com>
	<slrnfdpup6.inr.apardon@rcpc42.vub.ac.be>
Message-ID: <7xabs39bin.fsf@ruckus.brouhaha.com>

Antoon Pardon <apardon at forel.vub.ac.be> writes:
> > No the idea is that once there's enough entropy in the pool to make
> > one encryption key (say 128 bits), the output of /dev/urandom is
> > computationally indistinguishable from random output no matter how
> > much data you read from it.
> 
> If you were talking about /dev/random I would agree. But this is what
> the man page on my system says about /dev/urandom. ...
>        the returned values are theoretically vulnerable to a
>        cryptographic attack on the algorithms used by the driver.

Right.  The idea is that those attacks don't exist and therefore the
output is computationally indistinguishable from random.  Of course
whether the idea is correct, an unproven conjecture, but it looks
pretty good; certainly finding any problem with the specific
algorithms in urandom would be a significant research discovery and
not likely to affect the application being discussed.  Finding a
general attack that couldn't be fixed with some simple tweak would be
a major crypto breakthrough that would probably reshape a lot of
complexity theory.  This is unlike the situation with Mersenne
Twister, which was not designed for indistinguishability against an
opponent who knew what to look for.

In short, using /dev/random is fairly silly once you know there's
enough entropy in the randomness pool to make a good key.  If
/dev/urandom's algorithms are broken then whatever you're doing with
the /dev/random output is probably also broken.


From bbxx789_05ss at yahoo.com  Sat Sep 15 07:15:23 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sat, 15 Sep 2007 04:15:23 -0700
Subject: Just bought Python in a Nutshell
In-Reply-To: <mailman.569.1189843719.2658.python-list@python.org>
References: <eb79828c0709132112o5a3e7137n5ae5cd55e3e0b839@mail.gmail.com>
	<mailman.520.1189748935.2658.python-list@python.org>
	<1189784843.896396.108960@g4g2000hsf.googlegroups.com>
	<eb79828c0709141312v588ef074w25c2200c37951098@mail.gmail.com>
	<59f9c5160709141412q1098a4cbi989b6eed2f2cc899@mail.gmail.com>
	<eb79828c0709141432t582ddccbsda4750a4011666a9@mail.gmail.com>
	<eb79828c0709141459y264bc21fg4fcd17a4217cad65@mail.gmail.com>
	<46EB5B10.2020100@gmail.com>
	<96f089100709150107t10275d23p6b8cb7be6e748b7f@mail.gmail.com>
	<mailman.569.1189843719.2658.python-list@python.org>
Message-ID: <1189854923.148481.294830@n39g2000hsh.googlegroups.com>

Used copies of computer books for out of date editions are always
cheap.  "Python in a Nutshell (2nd ed)" is a reference book with a
frustratingly poor index--go figure.  It also contains errors not
posted in the errata.



From bh at izb.knu.ac.kr  Sun Sep 30 14:46:55 2007
From: bh at izb.knu.ac.kr (Byung-Hee HWANG)
Date: Mon, 01 Oct 2007 03:46:55 +0900
Subject: Can you please give me some advice?
In-Reply-To: <1191173228.756531.225860@o80g2000hse.googlegroups.com>
References: <mailman.1300.1191147737.2658.python-list@python.org>
	<13fuv0gh7342r27@corp.supernews.com>
	<1191173228.756531.225860@o80g2000hse.googlegroups.com>
Message-ID: <1191178015.1510.21.camel@viola.izb.knu.ac.kr>

On Sun, 2007-09-30 at 17:27 +0000, cmpython at gmail.com wrote:
> I know nothing of Ruby, but just the fact that in Ruby the Hello World
> program is
> 
> puts 'Hello, World!'
> 
> whereas the Python Hello World program is
> 
> print 'Hello, World!'
> 
> suggests to me that Python is more intuitive because the word "print"
> has a meaning in English that makes sense given what you want to do,
> but "puts" just doesn't.  And, as someone who has been learning Python
> from almost no knowledge of programming, I've found it is not too bad
> in trying to keep as reasonably close to a natural language like
> English
> as possible.
> 
> I also think the mandatory indenting of Python is helpful in forcing
> new programmers to be neat and see code blocks quickly.  Plus I doubt
> the Ruby community has such a large group of helpful people and
> libraries
> and such (but I could be wrong about that, just assuming it based on
> the
> fact that Python has been around longer).
> 
> On the other hand, perhaps because Ruby is newer it has been able to
> freshly start with advantages learned from the difficulties of other
> languages.  Byung-Hee Hwang ought to go the Ruby group and see what
> they are saying.
> 
> As far as English goes, Byung-Hee, you have to admit English grammar
> is easy (though spelling is not so easy).  That anyone can speak and
> write Chinese is impressive to me, as the language looks completely
> impossible!  Good luck!
> 
I read above your comments all. It will be good reason for my decision
must be Python. Anyway, your guidance has been useful and is greatly
appreciated. Okay, I will study English very hardly, as well. Thanks,
again!

Byung-Hee
 



From kf9150 at gmail.com  Sat Sep 29 02:08:19 2007
From: kf9150 at gmail.com (kf9150 at gmail.com)
Date: Sat, 29 Sep 2007 06:08:19 -0000
Subject: your opinion on book "Foundations of Python Network Programming"?
In-Reply-To: <1191017421.527084.104240@n39g2000hsh.googlegroups.com>
References: <1191016773.834049.8940@19g2000hsx.googlegroups.com>
	<1191017421.527084.104240@n39g2000hsh.googlegroups.com>
Message-ID: <1191046099.184895.139470@r29g2000hsg.googlegroups.com>

On Sep 28, 12:10 pm, TheFlyingDutchman <zzbba... at aol.com> wrote:
> I have not read this book but just wanted to say, in case you don't
> already know, they have Chapter 13 on FTP available as a free download
> at the publisher's web site:
>
> http://www.apress.com/book/view/1590593715

thanks for the link, i just downloaded the chapter.



From bjourne at gmail.com  Mon Sep 17 03:37:53 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Mon, 17 Sep 2007 09:37:53 +0200
Subject: Try this
In-Reply-To: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>
References: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>
Message-ID: <740c3aec0709170037m47a64dcaub008b83c6788b171@mail.gmail.com>

On 9/16/07, GeorgeRXZ <georgerxz at gmail.com> wrote:
> Well you are speed

That's an awesome party trick! But before I mail this to everyone at
the office, must have a better sentence. Well you are speed is to
gibberish. Something microsoft+evil... hm..

-- 
mvh Bj?rn


From horpner at yahoo.com  Tue Sep 18 08:17:29 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Tue, 18 Sep 2007 12:17:29 GMT
Subject: can Python be useful as functional?
References: <1190073045.618869.261290@k79g2000hse.googlegroups.com>
	<46ef8895$0$21882$426a34cc@news.free.fr>
	<1190106829.680544.159250@g4g2000hsf.googlegroups.com>
Message-ID: <slrnfevfag.1qs.horpner@FIAD06.norwich.edu>

On 2007-09-18, Kay Schluehr <kay.schluehr at gmx.net> wrote:
> On 18 Sep., 10:13, Bruno Desthuilliers <bruno.
> 42.desthuilli... at wtf.websiteburo.oops.com> wrote:
>> Lorenzo Stella a ?crit :
>>
>> > Hi all,
>> > I haven't experienced functional programming very much, but now I'm
>> > trying to learn Haskell and I've learned that: 1) in functional
>> > programming LISTS are fundmental;
>>
>> Not exactly. They are used quite a lot, yes, but that's also
>> the case in other paradigms. What's important in functional
>> programming is *functions*.
>
> Functional lists are not quite the same. They are actually
> recursive datastructes. In Python you would model them as
> nested tuples:
>
> t = (a, (b, (c, ...(d, None)))))

Tuples won't work for cyclic data, though.

-- 
Neil Cerutti


From gh at gregor-horvath.com  Mon Sep  3 07:40:49 2007
From: gh at gregor-horvath.com (Gregor Horvath)
Date: Mon, 03 Sep 2007 13:40:49 +0200
Subject: advice about `correct' use of decorator
In-Reply-To: <mailman.2074.1187294411.22759.python-list@python.org>
References: <mailman.2074.1187294411.22759.python-list@python.org>
Message-ID: <47ebd$46dbf2e2$547078de$8282@news.chello.at>

Gerardo Herzig schrieb:
> 
> @is_logued_in
> def change_pass():
>    bla
>    bla
> 
> And so on for all the other functions who needs that the user is still 
> loged in.
> 
> where obviosly the is_logued_in() function will determine if the dude is 
> still loged in, and THEN execute change_pass(). If the dude is not loged 
> in, change_pass() is NOT executed at all. Instead, it will be redirected 
> to the `login' screen.
> 
> Something in my mind tells me that this is not the pythonic way...But i 
> like the idea, so please tell me that im in the right way :)
> 

That's how turbogears does it.
See:

http://docs.turbogears.org/1.0/UsingIdentity?highlight=%28identity%29


Greg


From Scott.Daniels at Acm.Org  Sat Sep 22 10:39:17 2007
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sat, 22 Sep 2007 07:39:17 -0700
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <mailman.916.1190444594.2658.python-list@python.org>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>	<mailman.900.1190414696.2658.python-list@python.org>	<1190415741.380795.259050@y42g2000hsy.googlegroups.com>	<13f8unjjeqs5p97@corp.supernews.com>
	<mailman.916.1190444594.2658.python-list@python.org>
Message-ID: <13faa66cb1phre1@corp.supernews.com>

Ron Adam wrote:
> 
> 
> Scott David Daniels wrote:
>> Cristian wrote:
>>> On Sep 21, 3:44 pm, Ron Adam <r... at ronadam.com> wrote:
>>>
>>>> I think key may be to discuss names and name binding with your friend.
>>
>> Here's an idea:
>>
>> import math
>>
>> def sin_integral(start, finish, dx): ...
>> def cos_integral(start, finish, dx): ...
>> generalize and separate the integration technique from the
>> function it integrates.
> 
> How about this?
> It's based on the apple basic program example in How to Enjoy Calculus.
>    Ron
> 
> import math
> def integrate(fn, x1, x2, n=100):...
> def fn(x): ...
> print "Area of fn:", integrate(fn, 0, 2)
> print "Area of cos fn:", integrate(math.cos, 1, 2)

The point was a pedagogic suggestion, i.e. "Try taking your
friend along this path."   I wasn't trying to do a particularly
good job integrating, simply trying to show how you could
motivate first-class functions by showing a "useful" and
"fun" (at least to an engineer) function that cries out
for higher order functions.  In my experience engineers
often want a "reason its useful" before engaging with an
idea.  I'll bet that after a few such experiences he'll see
how passing around functions and (later) making functions from
from functions is a great tool to have in his toolbox.  Once
he sees that, there will be no problem.

-Scott David Daniels
Scott.Daniels at Acm.Org


From m.n.summerfield at googlemail.com  Fri Sep 14 12:43:17 2007
From: m.n.summerfield at googlemail.com (Mark Summerfield)
Date: Fri, 14 Sep 2007 16:43:17 -0000
Subject: An ordered dictionary for the Python library?
In-Reply-To: <slrnfel71p.spv.apardon@rcpc42.vub.ac.be>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<7xzlzrtrjn.fsf@ruckus.brouhaha.com>
	<1189664832.876539.86800@k79g2000hse.googlegroups.com>
	<7xps0mmig9.fsf@ruckus.brouhaha.com>
	<1189733708.659317.83950@y42g2000hsy.googlegroups.com>
	<1189753968.917636.310120@19g2000hsx.googlegroups.com>
	<slrnfekm8t.spv.apardon@rcpc42.vub.ac.be>
	<1189767415.814718.312870@k79g2000hse.googlegroups.com>
	<slrnfekt46.spv.apardon@rcpc42.vub.ac.be>
	<1189778191.529829.293320@19g2000hsx.googlegroups.com>
	<slrnfel71p.spv.apardon@rcpc42.vub.ac.be>
Message-ID: <1189788197.234522.197750@22g2000hsm.googlegroups.com>

On 14 Sep, 15:35, Antoon Pardon <apar... at forel.vub.ac.be> wrote:
[snip]
> I wish you all the luck you can get. Maybe if you succeed I'll change
> my mind about writing a PEP myself.
>
> However I think your chances will increase if you write your module
> and have it available in the cheese shop. If people start using your
> module regularly, your chances of it being included in the standard
> library will increase greatly.

I've taken your advice and put it on PyPI. PyPI isn't as easy to use
as CPAN, and the classifiers don't include "algorithms" or "data
structures" which I find surprising.



From laurent.pointal at limsi.fr  Tue Sep 11 08:44:18 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Tue, 11 Sep 2007 14:44:18 +0200
Subject: memcpy
In-Reply-To: <1189512598.410810.224340@y42g2000hsy.googlegroups.com>
References: <1189449530.171049.323230@22g2000hsm.googlegroups.com>
	<5klnsbF3vfqqU10@mid.uni-berlin.de>
	<1189512598.410810.224340@y42g2000hsy.googlegroups.com>
Message-ID: <fc62j3$9dt$1@news2.u-psud.fr>

Tim a ?crit :
<zip>
> Can I initialize something in Python that I can get access to it's
> pointer?

No, there is no pointer in Python semantic (they exist behind the scene 
in C-Python).

> How about:
> 
> self.data =
> TOTAL_OUTPUT_PARMETERS*[TOTAL_PARAMETER_ENTRIES*[c_float()]
> 
> or
> 
> self.data = TOTAL_OUTPUT_PARMETERS*[c_char_p("temp")]
> 
> or
> 
> self.data = [TOTAL_OUTPUT_PARMETERS*1.0]*TOTAL_PARAMETER_ENTRIES
> 
> I need to be able to copy the contents of a pointer to shared memory
> into an array of floats so I can index into that array and see my
> data. I have a pointer to shared meory but I don't know how to access
> it.

See module ctypes (14.14 in library reference manual).

A+

Laurent.


From gagsl-py2 at yahoo.com.ar  Tue Sep  4 14:46:37 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 04 Sep 2007 15:46:37 -0300
Subject: Noob: What is a slot? Me trying to understand another's code
References: <mailman.61.1188906904.2656.python-list@python.org>
	<CEFAE560FE3E3C458A2335A1AA37A82D06763950@MAIL2W2K3.WarrenNT.SaintFrancis.Loc>
Message-ID: <op.tx47rz04x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 04 Sep 2007 15:03:16 -0300, Carnell, James E  
<jecarnell at saintfrancis.com> escribi?:

> MY QUESTION:
> What is a slot? In class Object below the __init__ has a slot.  Note:
> The slot makes use of a data object called 'percept' that is used in the
> TableDrivenAgent(Agent) at the bottom of this post. I am guessing this
> is a type of Finite State Machine (I haven't bought the book yet so I am
> guessing).

The authors appear to be using the term in a very general sense - meaning  
"something that has to be filled in".
That is, you (the programmer) is supposed to "fill" the slot with  
meaningful code or data.

> [...] You subclass Object to get the objects you want.  Each object can
> have a .__name__  slot (used for output only).
> [...] An Agent is a subclass of Object with one required slot,
>     .program, which should hold a function that takes one argument, the
>     percept, and returns an action. Note that 'program' is a slot, not a  
> method.

Here they're trying to bind a simple function (not a method) to a name. I  
don't see the point in forcing things that way, maybe the authors have  
good reasons. But I'd use a staticmethod instead, perhaps.

Note: The C Python source code does use "slots", fields in a structure  
holding function pointers. For example, filling the nb_add slot in a type  
object, one can evaluate a+b for instances of that type.

-- 
Gabriel Genellina



From gagsl-py2 at yahoo.com.ar  Thu Sep  6 11:32:14 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 06 Sep 2007 08:32:14 -0700
Subject: Getting original working directory
In-Reply-To: <mailman.155.1189092379.2658.python-list@python.org>
References: <mailman.155.1189092379.2658.python-list@python.org>
Message-ID: <1189092734.750184.317490@y42g2000hsy.googlegroups.com>

On 6 sep, 12:19, rave247 rave247 <rave... at seznam.cz> wrote:

> I' am unable to solve this problem. I've got python program, it is installed in standard location. I run this program from some location X (note that I just type relative "myscript", leaving operating system to look up script itself using PATH variable) and this program somewhere in the code calls os.chdir() to change it is current working directory and I would need in python code to get the *original* directory location *after* os.chdir() is performed. This means the location X from which script was performed - it is the location I am in after script is finished.

Use os.getcwd()
http://docs.python.org/lib/os-file-dir.html

--
Gabriel Genellina



From aleax at mac.com  Mon Sep  3 23:44:30 2007
From: aleax at mac.com (Alex Martelli)
Date: Mon, 3 Sep 2007 20:44:30 -0700
Subject: Can you use -getattr- to get a function in the current module?
References: <mailman.8.1188866779.21370.python-list@python.org>
Message-ID: <1i3vtib.1y4lrkw6rojnvN%aleax@mac.com>

Sergio Correia <sergio.correia at gmail.com> wrote:

> This works:
> 
> # Module spam.py
> 
> import eggs
> 
> print getattr(eggs, 'omelet')(100)
> 
> That is, I just call the function omelet inside the module eggs and
> evaulate it with the argument 100.
> 
> But what if the function 'omelet' is in the module where I do the
> getattr (that is, in spam.py).  If I do any of this
> 
> print getattr(spam, 'omelet')(100)
> print getattr('','omelet')(100)
> print getattr('omelet')(100)
> 
> It wont work. Any ideas?

globals() returns a dict of all globals defined so far, so, _after_ 'def
omelet ...' has executed, globals()['omelet'](100) should be OK.


Alex


From bdesth.quelquechose at free.quelquepart.fr  Mon Sep 17 18:41:16 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 18 Sep 2007 00:41:16 +0200
Subject: What's with "long running processes" ?
In-Reply-To: <1190137468.694220.126180@d55g2000hsg.googlegroups.com>
References: <1190137468.694220.126180@d55g2000hsg.googlegroups.com>
Message-ID: <46f02389$0$32214$426a74cc@news.free.fr>

walterbyrd a ?crit :
> I understand that Python has them, but PHP doesn't.

Really ?

> I think that is because mod_php is built into apache, but mod_python
> is not usually in apache.

Language etc aside, what the difference between mod_php and mod_python 
(or mod_whatever) from apache's POV ?

> If  mod_python was built into apache, would
> python still have long running processes (LRP)?

mod_php is not more 'built into' apache than mod_python. Both are 
extension modules for apache. FWIW, when apache is configured to use 
mod_python, it starts a first python interpreter process at startup, 
then some more python "sub-interpreters" when needed, according to your 
configuration.

> Do LRPs have to do with a Python interpreter running all the time? Or
> is it something else?

The notion of "long running process" is nothing Python-specific. The 
most basic way to deliver dynamic content from a web server like apache 
is to use CGI - which means that on each http request, the web server 
starts a new (Python | Perl | PHP | Whatever) process. A more elaborate 
solution is to have another process running independently, and some way 
for both processes (web server and application) to communicate. This was 
is usually known as a "long running process".

> I also understand that LRPs are the reason that shared hosting is less
> common, and more expensive for python than php.

Yes and no. You can use Python with apache without a LRP - either with 
CGI or mod_python -  but the first solution is very inefficient, and the 
second is not really appropriate for shared hosting given how mod_python 
works. Also, while LRPs have a big advantage (you don't need to rebuild 
the whole world for each and every request), they have a couple 
drawbacks when it comes to shared hosting. The first one is that your 
host must provide some way to manage (run/stop/restart/monitor) the 
process. The second is that, while CGI scripts are (more or less) under 
control of the web server (IOW : they won't hang out forever), it's not 
true for LRPs. Which means that a program error (ie: an endless loop 
allocating memory on each iteration...) can potentially bring the while 
server down. Not that there are no ways to limit the risks and 
consequences, but this requires much more work for the host (and believe 
me, shared hosting administration is not simple...).

> The LRP have a major
> effect on how many users can packed onto a single server.

Not necessarily. From a purely technical POV, they are usually less 
wasteful wrt/ resources than CGI or mod_php.

> As to LRPs: does it matter if you're using mod_python, fastcgi, wsgi,
> scgi, cgi, or whatever?
 >
> Obviously, I am a little foggy about LRPs, can somebody help me out?

You can help yourself out, by installing apache on your own machine and 
learning the different ways to deploy web applications with it. While 
you won't have the same constraints as a shared hosting admin, you'll at 
least get a better understanding of the whole damn thing.





From sjmachin at lexicon.net  Sat Sep 15 07:22:49 2007
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 15 Sep 2007 04:22:49 -0700
Subject: regexp search on infinite string?
In-Reply-To: <1189838192.090251.292620@g4g2000hsf.googlegroups.com>
References: <1189802940.518794.129130@r29g2000hsg.googlegroups.com>
	<fcfdq4$23d$1@daisy.noc.ucla.edu>
	<1189838192.090251.292620@g4g2000hsf.googlegroups.com>
Message-ID: <1189855369.578539.14600@50g2000hsm.googlegroups.com>

On Sep 15, 4:36 pm, Paddy <paddy3... at googlemail.com> wrote:
> On Sep 15, 2:57 am, James Stroud <jstr... at mbi.ucla.edu> wrote:
>
>
>
> > Paddy wrote:
> > > Lets say i have a generator running that generates successive
> > > characters of a 'string'
> > >>From what I know, if I want to do a regexp search for a pattern of
> > > characters then I would have to 'freeze' the generator  and pass the
> > > characters so far to re.search.
> > > It is expensive to create successive characters, but caching could be
> > > used for past characters. is it possible to wrap the generator in a
> > > class, possibly inheriting from string, that would allow the regexp
> > > searching of the string but without terminating the generator? In
> > > other words duck typing for the usual string object needed by
> > > re.search?
>
> > > - Paddy.
>
> > re.search & re.compile checks for str or unicode types explicitly, so
> > you need to turn your data into one of those before using the module.

Aaaarbejaysus. Since when?

>>> import array
>>> ba = array.array('c', 'A hollow voice says "Plugh".')
>>> import re
>>> mobj = re.search('voi', ba)
>>> mobj
<_sre.SRE_Match object at 0x00B99598>
>>> mobj.span()
(9, 12)
>>>

>
> > buffer = []
> > while True:
> >    buffer.append(mygerator.next())
> >    m = re.search(pattern, "".join(buffer))
> >    if m:
> >      process(m)
> >      buffer = []
>
> > James
>
> Thanks James.

So:
buffer = array.array('c')
and flick the "".join() etc etc

HTH,
John





From luismgz at gmail.com  Mon Sep  3 01:10:39 2007
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M=2E_Gonz=E1lez?=)
Date: Mon, 03 Sep 2007 05:10:39 -0000
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
In-Reply-To: <1188785779.956824.143860@w3g2000hsg.googlegroups.com>
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<dea92f560709021735l2c72d53ew94410fcb33b9b50b@mail.gmail.com>
	<mailman.303.1188779927.28954.python-list@python.org>
	<1188785779.956824.143860@w3g2000hsg.googlegroups.com>
Message-ID: <1188796239.144793.239370@r29g2000hsg.googlegroups.com>

On Sep 2, 11:16 pm, llothar <llot... at web.de> wrote:
> On 3 Sep., 07:38, "Eduardo O. Padoan" <eduardo.pad... at gmail.com>
> wrote:
>
> > > No.http://www.artima.com/weblogs/viewpost.jsp?thread=211430
>
> > Ops, I meant:http://www.artima.com/forums/threaded.jsp?forum=106&thread=211200
>
> Thanks. I whish there would be a project for rewritting the C
> interpreter
> to make it better and more useable for threading use.
>
> But the CPU infrastructure is also not perfect enough so maybe it's
> good to
> wait with this a few more years until Intel and AMD know what they are
> doing.


I read somewhere that PYPY won't have the interpreter lock (I may be
wrong though).
Check it out: http://codespeak.net/pypy




From duncan.booth at invalid.invalid  Sat Sep 29 10:23:06 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 29 Sep 2007 14:23:06 GMT
Subject: sorteddict [was a PEP proposal, but isn't anymore!]
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190829592.800804.242260@50g2000hsm.googlegroups.com>
	<1190881576.186259.313720@57g2000hsv.googlegroups.com>
	<1190897445.179828.291720@y42g2000hsy.googlegroups.com>
	<slrnffslvp.40p.apardon@rcpc42.vub.ac.be>
Message-ID: <Xns99BA9C6861A3Eduncanbooth@127.0.0.1>

Antoon Pardon <apardon at forel.vub.ac.be> wrote:

> On 2007-09-27, gatti at dsdata.it <gatti at dsdata.it> wrote:
> 
>> Is this a practical use case? When are sequential visits of all
>> elements in order frequently suspended to make insertions and
>> deletions, with a need for efficient lookup by key?
> 
> Does it need to be a sequential visit of *all* elements?
> 
> Suppose you have a mapping of start times to tasks. You can then want
> to iterate over all tasks that need to be started between noon en 4 pm
> next monday.  If you have a hashtable you still will need to sort all
> the keys even if you will visit only 10%. If you have a tree you can
> just visit the specified keys.
> 
It still depends on the exact pattern of use. If you have an implementation 
which tracks additions and deletions and sorts them into the list when 
required (as we came up with earlier) then this is much more efficient that 
re-sorting the whole list every time. Sorting a large sorted list with a 
few unsorted elements on the end is comparable to inserting the elements 
individually into a tree, and you still have the hashtable benefits on 
accessing elements to help level the playing field.

For me though, the most convincing use-case for a sorted dictionary is one 
that I don't think has been mentioned yet:
There are situations when you want to use a dictionary with existing 
library code that doesn't care about the random key ordering, but you have 
additional requirements which the original code didn't know about. 

For example, in the sorteddict code I added an implementation for the 
__repr__ method and an associated doctest. Unlike iteration over sorteddict 
itself, I didn't bother to make __repr__ stable, so in that particular 
doctest it only tests the repr of a sorteddict with a single element. 
If that was fixed to make the repr stable it would be a real benefit for 
writing any doctests which want to produce a dictionary as a result.

Another example would be if you had a library which serialised a dictionary 
to xml. There is nothing wrong with the library if it doesn't care about 
order, but if you have some other reason why you want the xml to be stable 
(e.g. because you store it in a version control system and want to compare 
revisions) then a sorteddict would allow you to impose that behaviour on 
the library from outside.

Contrary to my earlier insistence that sorteddict is only really useful if 
you can have a key parameter, both of these examples simply want an 
arbitrary but defined order of iteration for dictionary keys. A much 
simpler sorteddict that has been discussed earlier would be sufficient.


From zachREMOVE at MEin.tu-clausthal.de  Fri Sep 28 15:00:45 2007
From: zachREMOVE at MEin.tu-clausthal.de (Gabriel Zachmann)
Date: Fri, 28 Sep 2007 21:00:45 +0200
Subject: Bug with lists of pairs of lists and append()
Message-ID: <fdjj0o$2oit$1@ariadne.rz.tu-clausthal.de>

Well,

could some kind soul please explain to me why the following trivial code 
is misbehaving?


#!/usr/bin/python
s = []
l = [ 0 ]
r = [0, 0]
while r:
	x = (l,r)
	print x
	s.append( x )
	l.append( r.pop(0) )
print s



The output I get is:

([0], [0, 0])
([0, 0], [0])
[([0, 0, 0], []), ([0, 0, 0], [])]

and the error is in the last line: the two pairs in the outer list are 
identical and they should be equal to the pairs one the first and the 
2nd line, respectively! Shouldn't they?

I think I'm going nuts -- for the life of me I don't see what's going on ...

Thanks a lot in advance for any insights, etc.

Best regards,
Gabriel.


From dkixk at earthlink.net  Fri Sep 28 19:27:04 2007
From: dkixk at earthlink.net (Damien Kick)
Date: Fri, 28 Sep 2007 18:27:04 -0500
Subject: The Modernization of Emacs: terminology buffer and keybinding
In-Reply-To: <873b0fhokz.fsf@kobe.laptop>
References: <1182093200.598418.218620@e9g2000prf.googlegroups.com>
	<1182272495.990807.99110@a26g2000pre.googlegroups.com>
	<87tzt3ihev.fsf@kobe.laptop> <m31wg6lre9.fsf@borud.not>
	<1182370216.961241.6960@n60g2000hse.googlegroups.com>
	<85zm2ufjpb.fsf@lola.goethe.zz>
	<1182372592.803332.288260@u2g2000hsc.googlegroups.com>
	<m3myyt47nq.fsf@latakia.dyndns.org>
	<1182549094.366282.286740@m37g2000prh.googlegroups.com>
	<87bqf7fwmg.fsf@telesippa.clsnet.nl>
	<1182553682.197778.138500@g37g2000prf.googlegroups.com>
	<873b0fhokz.fsf@kobe.laptop>
Message-ID: <13frd6vtarbee75@corp.supernews.com>

Giorgos Keramidas wrote:
> On Fri, 22 Jun 2007 23:08:02 -0000, nebulous99 at gmail.com wrote:
>> So much for the "free" in "free software". If you can't actually use
>> it without paying money, whether for the software or for some book, it
>> isn't really free, is it?
> 
> Please do not confuse the term 'free' in 'free software' with 'gratis'.
> 
> 'Gratis', i.e. 'lacking a monetary price tag' is something *very*
> different from the meaning of 'free' in 'free software'.

If you were referring to the "free" in "free Mumia Abu Jamal", I would 
agree with you.  I don't think anyone would imagine that this phrase 
meant that someone was going to get Mumia Abu Jamal gratis.  Like it or 
not, "free software" referring to "free as in beer" is probably the most 
common interpretation of the phrase for a native English speaker. 
Admittedly, I do not have a "scientific" survey handy.  However, I just 
asked my wife--who has absolutely no interest in anything related to 
programming, has never heard of the FSF, Eric Raymond, nor the 
disagreement between those two camps, nor probably will she ever have an 
interest--what she thinks I mean when I say "free software".  After 
getting over the "why are you asking such a stupid question" phase, the 
first thing that jumped to her mind was "free as in beer".  You can 
stamp, growl, swagger, spit, curse, and bluster all you want on this 
point, but millions of English speakers are going to ignore you anyway. 
  Lucky for most of them, they do not have to suffer the lectures of 
sociopolitically motivated language mavens trying to "correct" them from 
the error of mistaking the meaning of a phrase to be the normal meaning 
of that phrase.


From rainwatching at gmail.com  Sat Sep  1 11:54:09 2007
From: rainwatching at gmail.com (=?iso-8859-1?q?S=F6nmez_Kartal?=)
Date: Sat, 01 Sep 2007 15:54:09 -0000
Subject: reload(sys)
In-Reply-To: <f8GdnZ-6HbH-1kXbnZ2dnUVZ_s3inZ2d@comcast.com>
References: <1188521143.421431.119100@l22g2000prc.googlegroups.com>
	<JK2dnSgydPkg8ErbnZ2dnUVZ_u3inZ2d@comcast.com>
	<1188564816.430863.219560@w3g2000hsg.googlegroups.com>
	<f8GdnZ-6HbH-1kXbnZ2dnUVZ_s3inZ2d@comcast.com>
Message-ID: <1188662049.337034.58220@w3g2000hsg.googlegroups.com>

On 31 A ustos, 20:09, Steven Bethard <steven.beth... at gmail.com> wrote:
> S?nmez Kartal wrote:
> > On 31 A ustos, 04:24, Steven Bethard <steven.beth... at gmail.com> wrote:
> >> S?nmez Kartal wrote:
> >>> I've had an encoding issue and solved it by
> >>> "sys.setdefaultencoding('utf-8')"...
> >>> My first try wasn't successful since setdefaultencoding is not named
> >>> when I imported sys module. After, I import sys module, I needed to
> >>> write "reload(sys)" also.
> >>> I wonder why we need to call "reload(sys)" to get setdefaultencoding
> >>> named?
> >> sys.setdefaultencoding is purposely deleted from the sys module after
> >> it's loaded because you really shouldn't be using it. The reload() call
> >> restores the deleted attribute.
>
> >> If you'd like a less brittle solution to your encoding issue, explain
> >> what the issue was, and people here can probably help you find a better
> >> solution.
>
> >> STeVe
>
> > I was using the XMLBuilder(xmlbuilder.py). I'm writing XML files as
> > "f.write(str(xml))". At execution of that line, it gives error with
> > description, configure your default encoding...
>
> Could you post the actual traceback you're getting?
>
> STeVe

Steve,
I get this when it happens: "Decoding Error: You must configure
default encoding" which comes from in the code excerpt in
xmlbuilder.py (http://rafb.net/p/9rURi822.html)




From cjt22 at bath.ac.uk  Tue Sep  4 10:54:10 2007
From: cjt22 at bath.ac.uk (cjt22 at bath.ac.uk)
Date: Tue, 04 Sep 2007 07:54:10 -0700
Subject: Printing lists in columns
In-Reply-To: <46dd69b1$0$24998$426a74cc@news.free.fr>
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<mailman.315.1188810174.28954.python-list@python.org>
	<46dbd11e$0$6228$426a74cc@news.free.fr>
	<mailman.317.1188812089.28954.python-list@python.org>
	<1188816626.021956.281040@22g2000hsm.googlegroups.com>
	<5k2cjmF1r2aiU1@mid.uni-berlin.de>
	<1188836008.656284.76160@o80g2000hse.googlegroups.com>
	<46dc6f49$0$6207$426a34cc@news.free.fr>
	<1188900397.459760.259580@k79g2000hse.googlegroups.com>
	<slrnfdqe3t.i4p.hat@se-162.se.wtb.tue.nl>
	<Xns99A17FAC2587duncanbooth@127.0.0.1>
	<1188906767.737741.267350@19g2000hsx.googlegroups.com>
	<Xns99A18F8C528BCduncanbooth@127.0.0.1>
	<1188913394.763871.218660@d55g2000hsg.googlegroups.com>
	<46dd69b1$0$24998$426a74cc@news.free.fr>
Message-ID: <1188917650.826116.252470@19g2000hsx.googlegroups.com>

On Sep 4, 3:20 pm, Bruno Desthuilliers <bruno.
42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> cj... at bath.ac.uk a ?crit :
> (snip)
>
> > Thanks guys
>
> > I have a list of lists such as
> >  a = ["1" , "2"]  b = ["4", "5", "6"]  c = ["7",8", "9"]
> > Stored in another list: d = [a,b,c]
>
> > I know this makes me sound very stupid but how would I specify
> > in the parameter the inner lists without having to write them all out
> > such as:
>
> > for row in izip_longest(d[0], d[1], d[2], fillvalue='*'):
> >     print ', '.join(row)
>
> > i.e. How could I do the following if I didn't know how many list of
> > lists I had.
>
> for row in izip_longest(*d, fillvalue='*'):
>      print ', '.join(row)
>
> HTH

I thought that, but when I tried it, I recieved a
"Syntax error: invalid syntax"
message with ^ pointing to the 'e' of fillvalue



From usenet at solar-empire.de  Thu Sep 27 13:45:06 2007
From: usenet at solar-empire.de (Marc Christiansen)
Date: Thu, 27 Sep 2007 19:45:06 +0200
Subject: True of False
References: <1190910814.594559.30880@n39g2000hsh.googlegroups.com>
	<mailman.1173.1190911739.2658.python-list@python.org>
	<1190912324.363127.26100@r29g2000hsg.googlegroups.com>
Message-ID: <2q6ts4-gjv.ln1@pluto.solar-empire.de>

Casey <Caseyweb at gmail.com> wrote:
> I would recommend the OP try this:
> 
> run the (I)python shell and try the following:
> 
>>>> a = [x for x in "abcdefg"]
>>>> a
> ['a','b','c','d','e','f','g']
>>>> "c" in a
> True
>>>> "c" in a == True
> False
>>>> ("c" in a) == True
> True
> 
> The reason your conditional failed is that it was interpreted as "c"
> in (a == True) which is False.

That was my first thought, too. But watch:
  >>> a = list("abcde")
  >>> a
  ['a', 'b', 'c', 'd', 'e']
  >>> "c" in (a == True)
  Traceback (most recent call last):
    File "<stdin>", line 1, in <module>
  TypeError: argument of type 'bool' is not iterable

Then it dawned on me (is this the right phrase?): It's the same situation
as e.g. x < y >= 1, which means the same as "x < y and y >= 1" (except
that y is only evaluated once). So '"c" in a == True' gets evaluated as
'"c" in a and a == True'.

> the "==" operator binds at a higher precedence level than the "in"
> operator, just as multiplication binds higher than addition

Operator precedence plays no role in this case. It is a case of
'chained' comparisons.

Hope that clears it up
Marc


From jstroud at mbi.ucla.edu  Sun Sep  9 15:36:02 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 09 Sep 2007 12:36:02 -0700
Subject: Python syntax wart
In-Reply-To: <fbvvil$7dj$1@lust.ihug.co.nz>
References: <fbvvil$7dj$1@lust.ihug.co.nz>
Message-ID: <fc1hif$h2f$1@daisy.noc.ucla.edu>

Lawrence D'Oliveiro wrote:
> The one thing I don't like about Python syntax is using backslashes to
> continue lines. Yes, you can avoid them if you can include parentheses
> somehow, but this isn't always possible.
> 
> Possible:
> 
>     if (
>             quitting
>         and
>             len(client["to_write"]) == 0
>         and
>             len(client["read"]) + client["to_read"] == 0
>     ) :
>         close_client(client, "shutting down")
>     #end if
> 
> Not possible:
> 
>     for \
>         Link \
>     in \
>         GetEachRecord \
>           (
>             "links",
>             ("from_episode",),
>             "to_episode = %s",
>             [EpisodeID],
>             "order by when_created"
>           ) \
>     :
>         out.write \
>           (
>                 "<P><A HREF=\"%s\">Back to episode %d</A>\n"
>             %
>                 (
>                     LinkToMe({"ep" : Link["from_episode"]}),
>                     Link["from_episode"]
>                 )
>           )
>     #end for
>  


I usually write my code in a way that can be understood by looking at 
it, with self-documenting names, clear organization, and lines that fit 
under 72 characters (if I can help it). But if you insist on making perl 
noise, go 'head.


record_type = "links"
episodes = ("from_episode",)
format = "to_episodes = %s"
ids = [EpisodeID]
order = "order by when_created"

records = GetEachRecord(record_type, episodes, format, ids, order)

for Link in records:
   template = "<P><A HREF=\"%s\">Back to episode %d</A>\n"
   the_link = Link["from_episode"]
   target = LinkToMe({"ep" : Link["from_episode"]})

   msg = template % (target, the_link)

   out.write(msg)


James


From Graham.Dumpleton at gmail.com  Wed Sep  5 21:22:38 2007
From: Graham.Dumpleton at gmail.com (Graham Dumpleton)
Date: Thu, 06 Sep 2007 01:22:38 -0000
Subject: Module for mod_python
In-Reply-To: <mailman.120.1189035174.2658.python-list@python.org>
References: <12506829.post@talk.nabble.com>
	<mailman.120.1189035174.2658.python-list@python.org>
Message-ID: <1189041758.262088.60520@y42g2000hsy.googlegroups.com>

On Sep 6, 9:32 am, rieh25 <robertoedw... at gmail.com> wrote:
> Is it such a bad idea that it doesn't deserve a reply?

You only posted the question six hours ago. Maybe the people who might
want to comment are asleep.

BTW, have you done an analysis of the various existing database object
relational mapper systems for Python that already exist? There are
also some systems for automatic web application forms generation based
on database data as well.

How is what you have in mind different to or not covered by these
existing packages?

If you describe how what you want to do isn't satisfied by the
existing systems then people may be more interested in commenting. If
you aren't aware of these existing systems then perhaps use Google to
do some research on them first.

Graham

> rieh25 wrote:
>
> > I've been thinking about a module (actually I have it partially
> > implemented in Zope), that would do the following things:
>
> > - Read the structure of a MySql database (fill a dictionary with it)
>
> > In order to:
>
> > - Quickly create detail/filter/update forms given a table name (without
> > specifying the fields because they have already been detected)
> > - Keep state of record selection. In order to implement Master-Detail form
> > processing, with unlimited levels of parent-child table relations, which
> > have also been detected already (foreign keys)
> > - Management of interrelation between security and menus (a user can only
> > access certain parts of the application)
>
> > I think that Ruby on Rails does something similar, but still I thing it
> > would be interesting to implement it in Python. What do you think?
>
> --
> View this message in context:http://www.nabble.com/Module-for-mod_python-tf4386823.html#a12513012
> Sent from the Python - python-list mailing list archive at Nabble.com.




From steve at holdenweb.com  Wed Sep 12 20:37:43 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 12 Sep 2007 20:37:43 -0400
Subject: Search path for python script
In-Reply-To: <1189633230.265179.58780@19g2000hsx.googlegroups.com>
References: <1189633230.265179.58780@19g2000hsx.googlegroups.com>
Message-ID: <fca0om$hn5$1@sea.gmane.org>

grt wrote:
> I'm new to python, running it under cygwin. This must be easy but I
> haven't figured it out. I'm trying to run a script by typing:
> 
> python test.py
> 
> where test.py is in a directory I've added to PYTHONPATH, but test.py
> is not found. Perhaps PYTHONPATH only applies to modules imported
> within a script. I didn't notice an option to python to search the
> standard path, like Perl -S.
> 
> How is this done?
> 
The PYTHONPATH is only used to augment sys.path, which in turn is only 
used for locating modules to import.

If you want to locate scripts then just put them on your PATH, and make 
sure they are +x with a shebang line (#!/usr/bin/env python is the 
commonest) at the head.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From steve at REMOVE-THIS-cybersource.com.au  Sun Sep  2 18:40:50 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sun, 02 Sep 2007 22:40:50 -0000
Subject: howto reload Python module?
References: <1188764906.354022.86370@50g2000hsm.googlegroups.com>
Message-ID: <13dmevig2cn53b8@corp.supernews.com>

On Sun, 02 Sep 2007 13:28:26 -0700, dmitrey wrote:

> my Python module was changed in HDD (hardware disk drive), moreover,
> changed its location (but still present in sys.path). how can I reload a
> func "myfunc"  from the module? (or howto reload whole module)?
> Thank you in advance, D.

You're moving the LOCATION of modules while they are running???

WHY???

Nevertheless, and much to my surprise, a quick test suggests that so long 
as the new location is in sys.path, reload() continues to do what it is 
supposed to do.


-- 
Steven.


From bscrivener42 at gmail.com  Wed Sep 12 19:06:00 2007
From: bscrivener42 at gmail.com (BartlebyScrivener)
Date: Wed, 12 Sep 2007 23:06:00 -0000
Subject: Search path for python script
In-Reply-To: <1189633230.265179.58780@19g2000hsx.googlegroups.com>
References: <1189633230.265179.58780@19g2000hsx.googlegroups.com>
Message-ID: <1189638360.283791.273910@50g2000hsm.googlegroups.com>

On Sep 12, 4:40 pm, grt <gary.thr... at navy.mil> wrote:
>
> I'm trying to run a script by typing:
>
> python test.py
>

What happens if you just type:

test.py  or test

and hit Enter?

rd



From perl4hire at softouch.on.ca  Thu Sep 13 12:10:46 2007
From: perl4hire at softouch.on.ca (Amer Neely)
Date: Thu, 13 Sep 2007 12:10:46 -0400
Subject: Coming from Perl
In-Reply-To: <mailman.490.1189698752.2658.python-list@python.org>
References: <Cv%Fi.198$372.59@read2.cgocable.net>	<1189644803.816375.269950@y42g2000hsy.googlegroups.com>	<b46Gi.221$372.100@read2.cgocable.net>	<87y7fa52ru.fsf@benfinney.id.au>	<jWaGi.224$372.55@read2.cgocable.net>	<mailman.485.1189691416.2658.python-list@python.org>	<d9cGi.356$372.131@read2.cgocable.net>	<mailman.489.1189695918.2658.python-list@python.org>	<iPcGi.357$372.115@read2.cgocable.net>
	<mailman.490.1189698752.2658.python-list@python.org>
Message-ID: <KgdGi.2174$tx1.172@read1.cgocable.net>

Tim Golden wrote:
> Amer Neely wrote:
>> Richie Hindle wrote:
>>>> [Amer]
>>>> #!/usr/bin/python
>>>> [...] On my home PC [...]
>>>> [Thu Sep 13 04:16:03 2007] [error] [client 0.0.0.0] (OS 2)The system 
>>>> cannot find the file specified.
>>> That's because on your home PC Python is somewhere like
>>> C:\Python25\python.exe, not /usr/bin/python.
>>>
>>> Are you sure /usr/bin/python is correct for your hosting environment?
>>>
>>
>> It's my understanding that the Windows shell doesn't pay much 
>> attention to the shebang line if the file type is associated with the 
>> proper application.
>>
>> But I tried your suggestion and got the same results.
> 

See my reply to this post - I had a typo in the shebang line and it now 
works on my home PC.

> The Windows shell doesn't, but Apache does. (Haven't followed
> this thread closely, but I seem to remember it has to do with
> running CGI scripts).

This seems to indicate that maybe my host needs to configure Apache to 
run python scripts? But I didn't need to do anything with mine.

-- 
Amer Neely
w: www.webmechanic.softouch.on.ca/
Perl | MySQL programming for all data entry forms.
"Others make web sites. We make web sites work!"


From rcdailey at gmail.com  Tue Sep  4 14:26:36 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Tue, 4 Sep 2007 13:26:36 -0500
Subject: Rendering API for python?
Message-ID: <496954360709041126l2c1d4a3cg821b263acb9fa9c2@mail.gmail.com>

Hi,

I'm developing a quick python script to test an algorithm of mine. I would
like to be able to plot the algorithm results to a diagram (much like you
can do in Matlab). I was wondering if there's an API around that would allow
me to quickly do this? Perhaps some sort of rendering API or plotting API
for python? Any help is greatly appreciated. Thanks.

PS: I'm using Python on Windows.
-------------- next part --------------
An HTML attachment was scrubbed...
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From michele.simionato at gmail.com  Wed Sep 12 10:54:34 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Wed, 12 Sep 2007 14:54:34 -0000
Subject: Dynamically removing methods in new-style classes
In-Reply-To: <1189607295.676704.215210@r34g2000hsd.googlegroups.com>
References: <1189607295.676704.215210@r34g2000hsd.googlegroups.com>
Message-ID: <1189608874.316142.64050@g4g2000hsf.googlegroups.com>

On Sep 12, 4:28 pm, agupta0... at gmail.com wrote:
> I am trying unsuccessfully to remove some methods from an instance,

Usuall one does not remove methods, but wraps the object and delegates
only to
a restricted number of methods. Is this solution viable? If not, you
may be
forced to change the class of the instance, or to play trick such as

def removed_method(self):
   raise NotImplementedError

self.test1 = removed_method.__get__(self)

          Michele Simionato



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Sep 12 03:54:46 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 12 Sep 2007 09:54:46 +0200
Subject: Generating HTML
In-Reply-To: <mailman.429.1189582623.2658.python-list@python.org>
References: <9e2f512b0709112133l41ce5ef1g815962a81becf6b9@mail.gmail.com>
	<mailman.429.1189582623.2658.python-list@python.org>
Message-ID: <46e79b40$0$28082$426a74cc@news.free.fr>

Evan Klitzke a ?crit :
> On Wed, 2007-09-12 at 01:33 -0300, Sebastian Bassi wrote:
>> Hello,
>>
>> What are people using these days to generate HTML? I still use
>> HTMLgen, but I want to know if there are new options. I don't
>> want/need a web-framework a la Zope, just want to produce valid HTML
>> from Python.
> 
> It's not applicable for everything, but if you're planning on using
> Python to generate web pages you should really be using Cheetah
> templates. Very simple to use template system that is also very
> powerful, and you don't need to use it in conjunction with a heavy web
> application framework. See http://www.cheetahtemplate.org/
> 

Same for Mako (http://www.makotemplates.org), which has IMHO a much 
nicer syntax (Cheetah looks too much like line noise IMHO).


From wizzardx at gmail.com  Sun Sep 23 12:34:48 2007
From: wizzardx at gmail.com (David)
Date: Sun, 23 Sep 2007 18:34:48 +0200
Subject: Writing Object Data to Disk
In-Reply-To: <1190443648.5838.6.camel@ubuntu-laptop>
References: <1190443648.5838.6.camel@ubuntu-laptop>
Message-ID: <18c1e6480709230934k61504fa1r528c2f4ade9722f0@mail.gmail.com>

> I would like to know if "Pickling" the class object is the only way of
> writing it to disk for persistent storage. Also, do we have a concept
> similar to "array of objects" in Python? The number of objects is only
> known at "run-time".

Have a look at YAML.

http://freshmeat.net/projects/syck/

Also it is possible to persist python data to and from XML. See
xml.marshal.generic.dumps


From duncan.booth at invalid.invalid  Sun Sep 16 09:09:17 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 16 Sep 2007 13:09:17 GMT
Subject: Can't see the arguements when use Python in WSH.
References: <1189945728.024735.3960@w3g2000hsg.googlegroups.com>
Message-ID: <Xns99AD8FFD58F1Eduncanbooth@127.0.0.1>

GaryLee <garywlee at gmail.com> wrote:

> Does anyone have the same situation? Is it my pywin32 package
> corrupted? I've downloaded the last pywin32 package and executed the
> site-packages\win32comext\axscript\client\pyscript.py to register the
> PyScript. But, the problem is still there.
> 
I've no idea why pyscript.py doesn't set up the registry correctly, but it 
should all work if you run the command:

   ftype pysFile=%SystemRoot%\System32\WScript.exe "%1" %*

(If you wish you can try "ftype pysFile" first to see the current setting. 
On my system the file association wasn't set at all but it sounds like on 
yours it may be set but missing the %*)


From ed at leafe.com  Wed Sep 19 14:14:04 2007
From: ed at leafe.com (Ed Leafe)
Date: Wed, 19 Sep 2007 14:14:04 -0400
Subject: super() doesn't get superclass
In-Reply-To: <1190199134.791808.267110@22g2000hsm.googlegroups.com>
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au>
	<46f0fba0$0$29605$426a34cc@news.free.fr>
	<1190199134.791808.267110@22g2000hsm.googlegroups.com>
Message-ID: <7442D29C-FC2E-4E31-A82F-D1F8F7D1ECF5@leafe.com>

On Sep 19, 2007, at 6:52 AM, Michele Simionato wrote:


> Well, I am personally *against* multiple inheritance (i.e. IMO it
> gives more troubles than advantages)

	For the sorts of examples that have been used in this thread, it  
isn't MI that's problematic; it's the poor quality of the design.

	Mixing two complete classes to create a multiply-inherited class is  
almost always the sign of poor design. OTOH, mixin-style classes are  
a wonderful way to ensure consistency across several different  
classes that all need a common behavior added to them. We use mixins  
extensively throughout Dabo, and they allow us to give several  
classes the desired behaviors, while only having one mixin class to  
maintain.

-- Ed Leafe
-- http://leafe.com
-- http://dabodev.com




From jjl at pobox.com  Tue Sep 11 16:51:11 2007
From: jjl at pobox.com (John J. Lee)
Date: Tue, 11 Sep 2007 20:51:11 GMT
Subject: Car-ac-systems
References: <cd6dnW0Vf8-wOnvbRVnyhwA@eclipse.net.uk>
	<b0ac48a01b8bb8c9c2b92ff03bf0@msnews.microsoft.com>
	<1189532573.728913.306470@g4g2000hsf.googlegroups.com>
	<5ko2rjF4om2bU1@mid.uni-berlin.de>
	<fdGdnWvRKpfqfnvbnZ2dneKdnZydnZ2d@eclipse.net.uk>
Message-ID: <87odg9lydc.fsf@pobox.com>

"John Timney (MVP)" <x_john at timney.eclipse.co.uk> writes:
[...]
> I like top posted threads, its my preferred response method - and actually 
[...]

http://en.wikipedia.org/wiki/Apostrophe#English_language_usage


John


From robert.kern at gmail.com  Fri Sep 28 17:03:21 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 28 Sep 2007 16:03:21 -0500
Subject: List search
In-Reply-To: <eafb6$46fd68a3$4275d90a$4234@FUSE.NET>
References: <eafb6$46fd68a3$4275d90a$4234@FUSE.NET>
Message-ID: <fdjq6r$2en$1@sea.gmane.org>

Kevin Walzer wrote:
> I'm having a problem with searching a list. Here's my code:
> 
> mylist = ['x11', 'x11-wm', 'x11-system']
> 
> for line in mylist:
> 	if 'x11' in line:
> 		print line
> 
> This results in the following output:
> 
> x11
> x11-wm
> x11-system
> 
> I'm looking to return the list item that just has 'x11'.  How can I 
> structure my search term so that this output is returned?

line == 'x11'

-- 
Robert Kern

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



From robyn.sword at phs.com  Mon Sep 24 11:39:11 2007
From: robyn.sword at phs.com (Sword, Robyn)
Date: Mon, 24 Sep 2007 10:39:11 -0500
Subject: CLAIM YOUR TWO FREE UNIVERSAL STUDIOS TICKETS!
Message-ID: <CC91260B9BB4C941B80ABDA7E598EDA501460EA8@APSW0442EVS.ms.ds.uhc.com>


how do you claim your tickets?


 


CLAIM YOUR TWO FREE UNIVERSAL STUDIOS TICKETS!

CLAIM YOUR TWO FREE UNIVERSAL STUDIOS TICKETS! lisawill4u at yahoo.com
<mailto:python-list%40python.org?Subject=CLAIM%20YOUR%20TWO%20FREE%20UNI
VERSAL%20STUDIOS%20TICKETS%21&In-Reply-To=> 
Sat Nov 20 21:35:53 CET 2004 

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From kay.schluehr at gmx.net  Tue Sep 18 16:37:43 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Tue, 18 Sep 2007 13:37:43 -0700
Subject: Metatest 0.1.0
In-Reply-To: <46F006D5.3060609@pytex.org>
References: <mailman.721.1190126947.2658.python-announce-list@python.org>
	<1190130384.753009.142150@i13g2000prf.googlegroups.com>
	<46F006D5.3060609@pytex.org>
Message-ID: <1190147863.968759.229330@g4g2000hsf.googlegroups.com>

On Sep 18, 7:11 pm, Jonathan Fine <jf... at pytex.org> wrote:
Jonathan Fine schrieb:
> Kay Schluehr wrote:
>
>>>     http://metatest.sourceforge.net/doc/pyconuk2007/metatest.html
>
>>> From the HTML slides:
>>
>>    Assertion tests are easy to write but report and run poorly.
>>
>> I tend to think this is a prejudice that leads to ever more ways to
>> write tests perform test discoveries, invent test frameworks etc.
>>
>> When I thought about organizing my tests for EasyExtend I was seeking
>> for a strategy being adapted to my own behaviour. The very first step
>> I made when creating a new language, modifying a grammar rule,
>> changing the Transformer etc. was starting an interactive shell and
>> typing some commands.
>
> Yes, Python is really good for that.  I do it a lot also.
>
>> This is just checking out or smoke testing my
>> application and I wanted to reproduce it. So I recorded the
>> interactive shell session and replayed it as another shell session. I
>> enabled to set breakpoints in the logged output and implemented a
>> command for proceeding the replay.
>
> This is similar, I think, to what Metatest does.  See http://metatest.sourceforge.net/doc/pyconuk2007/metatest.html#slide5
>
>> Then I discovered I actually wrote an interactive test runner. I don't
>> have to care for all the exceptions being thrown in the session and
>> don't care for cleanups but just assign parts of the session as tests
>> using assert for getting an overview at the end. The only additonal
>> command I implemented was raises to capture the side-effect of raising
>> an exception.
>
> Sounds interesting.  Is this code, or examples of its use, available?

Sure, it's part of EasyExtend. See also www.fiber-space.de

Checkout the documentation for consoletest. I guess in the current
release recording and replaying can't be done in the same
run. I've got a corrected version on my disk but I didn't uploaded it
yet and corrected the docs.

The reason why consoletest is bundled with EasyExtend is the use of a
different, more flexible and somewhat simpler InteractiveConsole
implementation than available in the stdandard library that can
execute code of arbitrary languages. This was a projects requirement
but
there is no fundamental reason why it can't be separated from
eeconsole.py.

>> So I'm going to argue here that there isn't anything particular about
>> writing/coding a test ( planning tests, specifying tests, reviewing a
>> testspecification etc. are another issue ). Instead you can keep a
>> seemingly unrelated practice and turn it into a test by a tiny
>> signification.
>
> I'm all in favour of making tests easier to write, easier to run, and the outputs easier to understand.
>
> I've submitted a feature request for command line use of Metatest (something I've been thinking of a while):
> http://sourceforge.net/tracker/index.php?func=detail&aid=1797187&group_id=204046&atid=988038
>
> Here's how I'd like the feature to look (from the above URL):
> ===
> Python 2.4.1a0 (#2, Feb 9 2005, 12:50:04)
> [GCC 3.3.5 (Debian 1:3.3.5-8)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> from metatest.py.mymod import plus
> >>> import metatest
> >>> plus(2, 3) == 6
> <MyStub 4>
> >>> metatest.immediate = True # New command
> >>> plus(2, 3) == 6
> TestError: Expected '6', got '5'
> >>>
> ===
>
> OK.  So now here's a problem.  We can create stuff like the above that states clearly (I hope) what is required.  How can we write a test for this sort of behaviour?  So that's another feature request.
How does metatest analyze the tested expression? Lets say I try to
check this expression

>>> plus( f(1) == True, f(2) != False) == plus( f(2) == True, f(1) != False)

metatest must have decent knowledge about the expression structure of
Python expressions to detect the top level comparison and separate it
from the right and left hand side in order to generate the message of
the example. Since consoletest uses Pythons assert it is obviously
primitive in this respect and lacks expressivity of error messages. So
it fails with respect of one of your criteria. But note that
EasyExtend has the full power of a python parser in the background and
is a framework for analyzing and transforming expressions. I refused
to filter assert here or nest transformers since they might interfere
with more general purposes of EasyExtend.

Regards, Kay




From rave247 at seznam.cz  Thu Sep  6 11:19:35 2007
From: rave247 at seznam.cz (=?us-ascii?Q?rave247=20rave247?=)
Date: Thu, 06 Sep 2007 17:19:35 +0200 (CEST)
Subject: =?us-ascii?Q?Getting=20original=20working=20directory?=
Message-ID: <1520.1657-1856-1993609010-1189091974@seznam.cz>

Hi,

I' am unable to solve this problem. I've got python program, it is installed in standard location. I run this program from some location X (note that I just type relative "myscript", leaving operating system to look up script itself using PATH variable) and this program somewhere in the code calls os.chdir() to change it is current working directory and I would need in python code to get the *original* directory location *after* os.chdir() is performed. This means the location X from which script was performed - it is the location I am in after script is finished.

Thanks for any help


From bj_666 at gmx.net  Fri Sep  7 09:42:30 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 7 Sep 2007 13:42:30 GMT
Subject: exponential float formmating
References: <1189170499.945175.275210@57g2000hsv.googlegroups.com>
Message-ID: <5kd2q6F31i6hU4@mid.uni-berlin.de>

On Fri, 07 Sep 2007 06:08:19 -0700, zunbeltz wrote:

> For compatibility reasons with an old program I have to format string
> in exponential format with the following format
> 
> 0.xxxxxE-yy
> 
> This means that the number start always by 0 and after the exponent
> there should be alway the sing and 2 number for the exponent.
> 
> for example 13 shoud be 0.13000E+02
> I always get 1.30000E001

I don't know if this is platform dependent but this works for me:

In [41]: '%e' % 1.3
Out[41]: '1.300000e+00'

In [42]: ('%e' % 1.3).upper()
Out[42]: '1.300000E+00'

Ciao,
	Marc 'BlackJack' Rintsch


From carsten at uniqsys.com  Tue Sep 18 13:58:03 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Tue, 18 Sep 2007 13:58:03 -0400
Subject: Writing to multiple excel worksheets
In-Reply-To: <F0BABB54-FDE4-437F-B158-9F8B2D3D8432@comhem.se>
References: <969892.43175.qm@web50103.mail.re2.yahoo.com>
	<F0BABB54-FDE4-437F-B158-9F8B2D3D8432@comhem.se>
Message-ID: <1190138283.3388.19.camel@dot.uniqsys.com>

On Tue, 2007-09-18 at 18:49 +0200, Tommy Nordgren wrote:
> 	Excel files are in a binary and proprietary format.

True, but that doesn't mean you can't create them with free software.
PyExcelerator (http://sourceforge.net/projects/pyexcelerator) can create
Excel files.

HTH,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From s.mientki at id.umcn.nl  Thu Sep 13 09:27:57 2007
From: s.mientki at id.umcn.nl (stef)
Date: Thu, 13 Sep 2007 15:27:57 +0200
Subject: wxstyledtextctrl and xml markup
In-Reply-To: <1189689993.338662.267340@k79g2000hse.googlegroups.com>
References: <mailman.478.1189682613.2658.python-list@python.org>
	<1189689993.338662.267340@k79g2000hse.googlegroups.com>
Message-ID: <4abcb$46e93adc$83aef404$31489@news2.tudelft.nl>


> I highly recommend the wxPython mailing list. Right now it is down
> (see their website), 
its'up again.


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Sep 19 07:55:07 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 19 Sep 2007 13:55:07 +0200
Subject: super() doesn't get superclass
In-Reply-To: <1190199134.791808.267110@22g2000hsm.googlegroups.com>
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au>
	<46f0fba0$0$29605$426a34cc@news.free.fr>
	<1190199134.791808.267110@22g2000hsm.googlegroups.com>
Message-ID: <46f10e0e$0$27681$426a34cc@news.free.fr>

Michele Simionato a ?crit :
> On Sep 19, 12:36 pm, Bruno Desthuilliers <bruno.
> 42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> 
>> The next class in the MRO *is* a superclass of the *instance*. Else it
>> wouldn't be in the MRO !-)
> 
> Bruno, there is no such a thing as a superclass in a multiple
> inheritance

May I disagree ? Of course, with MI, there's no such thing as "the" 
superclass, but there are still superclasses - the classes listed in the 
MRO. At least according to a commonly agreed definition of "superclass"...

(snip)

>> Well, I understand that you disagree with both the documention and the
>> name of super. As far as I'm concerned, the mere fact that this
>> discussion happens is probably a sign that there's something to be fixed
>> here - at least wrt documentation, possibly wrt/ naming. But the
>> *feature* by itself is certainly something we do want to keep, whatever
>> some may argue.
> 
> Well, I am personally *against* multiple inheritance (i.e. IMO it
> gives more
> troubles than advantages)

Given Python's type system and support for delegation, it's a fact that 
MI is not that necessary - FWIW, I don't remember having ever used it 
except in Zope2 (where it's commonly a PITA).

Now I don't think there's any reason to remove from MI, since it's 
already there, and about as usable as it can be.


From __peter__ at web.de  Sun Sep 23 03:29:12 2007
From: __peter__ at web.de (Peter Otten)
Date: Sun, 23 Sep 2007 09:29:12 +0200
Subject: newb: glob on windows os.renames creates many nested folders
References: <1190515183.389916.92240@19g2000hsx.googlegroups.com>
Message-ID: <fd54k8$ahk$03$1@news.t-online.com>

crybaby wrote:

> when I do this in my python code and run it in windows xp, it creates
> ctemp/..../.../.../../ so on and creates file t.  Not file starting
> with the name complist and ending with .txt (complist*.txt).  Any idea
> why this may be? glob only works in *nix not on windows?
> 
> os.renames(glob.glob('complist*.txt')
> [0],r'temp/'.join(glob.glob('complist*.txt')[0]))

Python does what you tell it. Let's assume

>>> glob.glob("complist*.txt")
['complist001.txt', 'complist002.txt']

The first argument to os.renames() is then

'complist001.txt'

and the second is 'temp/'.join('complist001.txt'), or

>>> "temp/".join("complist001.txt")
'ctemp/otemp/mtemp/ptemp/ltemp/itemp/stemp/ttemp/0temp/0temp/1temp/.temp/ttemp/xtemp/t'

that is the join() method interprets the string "complist001.txt" as the
character sequence ["c", "o", "m", ...] and stuffs a "temp/" between "c"
and "o", "o" and "m", ...

What you want instead is just "temp/" + "complist001.txt" or, written in
an os-independent way, os.path.join("temp", "complist001.txt") where a
path separator is added automatically. Your code then becomes

fn = glob.glob("complist*.txt")[0] # don't call stuff like that twice
os.renames(fn, os.path.join("temp", fn))

Peter


From lucaberto at libero.it  Thu Sep  6 09:09:41 2007
From: lucaberto at libero.it (luca72)
Date: Thu, 06 Sep 2007 06:09:41 -0700
Subject: Sip4.7
Message-ID: <1189084181.385917.253950@d55g2000hsg.googlegroups.com>

Hello
i have python2.5 with sip4.6 installed on a linux machine, i need to
install sip4.7 but i get a lot of error like this:

sip.h:525: error: expected specifier-qualifier-list before
'PyMethodDef'
sip.h:609: error: expected specifier-qualifier-list before
'sipForceConvertToFunc'
sip.h:666: error: expected specifier-qualifier-list before 'PyObject'
sip.h:902: error: expected specifier-qualifier-list before
'PyTypeObject
sipint.h:81: error: expected '=', ',', ';', 'asm' or '__attribute__'
before '*' token
sipint.h:86: error: expected '=', ',', ';', 'asm' or '__attribute__'
before '*' token
sipint.h:87: error: expected '=', ',', ';', 'asm' or '__attribute__'
before '*' token
siplib.c:39: error: expected ')' before '*' token
siplib.c:41: error: expected ')' before '*' token
siplib.c:43: error: expected ')' before '*' token
siplib.c:45: error: expected ')' before '*' token
siplib.c:48: error: expected ')' before '*' token
plib.c:285: error: expected specifier-qualifier-list before 'PyObject'
siplib.c:290: error: expected '=', ',', ';', 'asm' or '__attribute__'
before 'sipWrapperType_Type'

Have you some idea why?

Regards

Luca



From mensanator at aol.com  Sun Sep  9 16:12:09 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: Sun, 09 Sep 2007 13:12:09 -0700
Subject: Modul (%) in python not like in C?
In-Reply-To: <mailman.295.1189365378.2658.python-list@python.org>
References: <880dece00709091201n449d4c2k31998a5d426de17d@mail.gmail.com>
	<mailman.295.1189365378.2658.python-list@python.org>
Message-ID: <1189368729.821382.85430@50g2000hsm.googlegroups.com>

On Sep 9, 2:15???pm, "J. Cliff Dyer" <j... at sdf.lonestar.org> wrote:
> Dotan Cohen wrote:
> > FIrst of all, how is the % symbol (as in 70%6=4) called in English?
>
> > Second, in Turbo C -111%10=-1 however in python -111%10=9. Is one or
> > the other in error? Is this a known gotcha? I tried to google the
> > subject however one cannot google the symbol %. Thanks in advance.
>
> > Dotan Cohen
>
> The % operator is called "modulo" in English. ?I don't think the
> difference in implementation is an error. ?It's just a difference of
> calculation method.
>
> Python will always yield a number x = m%n such that 0 <= x < n, but
> Turbo C will always yield a number such that if x = m%n -x = -m%n. ?That
> is, since 111 % 10 = 1, -111 % 10 = -1. ?The two values will always
> differ by n (as used above).
>
> I'm sure there are mathematicians on the list who can give you a more
> technical, precise explanation of the reasons for the different results.
>
> Cheers,
> Cliff

Think of clock arithmetic:

     /   0
 -1 /
   / 9       1

   8           2

   7           3

     6       4

         5

1 step counter-clockwise is the same as 9 steps
clockwise, so -1 is congruent to 9 (mod 10), so both
are correct. A common mistake is to assume -1 and +1
to be the same. Remember, in Python, sequential
negative numbers % n is equivalent to going
counter-clockwise:

>>> for i in xrange(-1,-12,-1):
	print i % 12,


11 10 9 8 7 6 5 4 3 2 1





From fakeaddress at nowhere.org  Wed Sep 26 03:28:39 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Wed, 26 Sep 2007 07:28:39 GMT
Subject: database persistence with mysql, sqlite
In-Reply-To: <1190650748.590245.221490@n39g2000hsh.googlegroups.com>
References: <1190502677.970811.181100@22g2000hsm.googlegroups.com>
	<mailman.993.1190636458.2658.python-list@python.org>
	<1190650748.590245.221490@n39g2000hsh.googlegroups.com>
Message-ID: <HSnKi.35782$RX.34622@newssvr11.news.prodigy.net>

coldpizza wrote:
> It turned out that the method above ('SELECT * FROM TABLE LIMIT L1,
> L2') works ok both with mysql and sqlite3, therefore I have decided to
> stick with it until I find something better. With Sqlite3 you are
> supposed to use LIMIT 10 OFFSET NN, but it also apparently supports
> the mysql syntax (LIMIT NN, 10) for compatibility reasons.

A more reliable form is along the lines:

     SELECT keyfield, stuff
     FROM table
     WHERE keyfield > ?
     ORDER BY keyfield
     LIMIT 10

With the right index, it's efficient.


-- 
--Bryan


From carsten at uniqsys.com  Fri Sep  7 13:40:35 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 07 Sep 2007 13:40:35 -0400
Subject: passing command line arguments
In-Reply-To: <93066C069973ED448DC2BCEA9C44A7383BE32D@efmailx>
References: <93066C069973ED448DC2BCEA9C44A7383BE32D@efmailx>
Message-ID: <1189186835.3367.59.camel@dot.uniqsys.com>

On Fri, 2007-09-07 at 12:47 -0400, Brian McCann wrote:
>  
> Hi,
>  
> when I run the script show_args2.py
> 
> # ./show_args2.py 1 2 3
> 
> I get the following error
> 
> Traceback (most recent call last):
>   File "./show_args2.py", line 4, in ?
>     print 'The arguments of %s are "%s"' %s \
>     NameError: name 's' is not defined

Start here: http://catb.org/~esr/faqs/smart-questions.html#before

-- 
Carsten Haese
http://informixdb.sourceforge.net




From martin at v.loewis.de  Sat Sep 29 03:00:16 2007
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 29 Sep 2007 09:00:16 +0200
Subject: python 2.5 and 3gb switch
In-Reply-To: <fdkq8g$vj2$1@aioe.org>
References: <fdkan6$ne0$1@aioe.org> <fdkfqb$qr$1@daisy.noc.ucla.edu>
	<fdkq8g$vj2$1@aioe.org>
Message-ID: <46FDF800.5030504@v.loewis.de>

> The code runs successfully in lesser missions it just wont run in the extra 
> memory available when I try to run it along with my other programs in a 3gb 
> space.

Still, it would be helpful if you explained how "wont run" manifests:
does it fail to start, does it give you an exception, does it crash,
does it erase your hard disk?

I'm not aware of a 3gb Python build, but you should be able to build it
yourself.

Regards,
Martin


From zzbbaadd at aol.com  Fri Sep 28 13:24:46 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Fri, 28 Sep 2007 10:24:46 -0700
Subject: Python 3.0 migration plans?
In-Reply-To: <5m4oi1Fbic8sU1@mid.uni-berlin.de>
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>
	<87641v4j38.fsf@benfinney.id.au>
	<1190949502.875203.57690@w3g2000hsg.googlegroups.com>
	<5m3p1dFbl98pU1@mid.uni-berlin.de>
	<1190968707.799398.232550@19g2000hsx.googlegroups.com>
	<5m4126FbgjabU1@mid.uni-berlin.de>
	<1190993122.979034.305060@50g2000hsm.googlegroups.com>
	<5m4oi1Fbic8sU1@mid.uni-berlin.de>
Message-ID: <1191000286.256156.49530@n39g2000hsh.googlegroups.com>

On Sep 28, 9:30 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> > You said it was a most basic language feature. I still haven't heard
> > anything that leads me to believe that statement is correct. What
> > languages implemented decorators as a most basic language feature?
>
> I was talking about Python, the programming language that is discussed in
> this NG
>
> > Python didn't have them for over a decade so it doesn't qualify.
>
> Says who? For further comments, see below.

I had the impression you were saying it was a basic language feature
of most languages. In any event Guido Van Rossum didn't include them
for over a decade. If he felt they were a basic language feature it
seems that he would have included them in 1991.

>
>
>
> >> >> Maybe you should start using python more and _then_ start discussions
> >> >> about it's features, when you have good grounds and can provide viable
> >> >> alternatives? But I guess that's a wish that won't be granted....
>
> >> > static and abstract keywords would seem to be very viable
> >> > alternatives. Viable enough that several language designers used them.
>
> >> As I said - you don't get it. The decorators (in conjunction with the
> >> descriptor protocol - ever heard of that?) are very powerful yet lead as
> >> an artifact to simple, declarative implementations of features you like,
> >> namely static and abstract methods.
>
> > You said I had to provide a viable alternative. I did that. I haven't
> > heard of the descriptor protocol.
>
> Where did you do provide that alternative?

def static
def abstract

I was not providing an alternative for decorators.


>
> > One of the problems with "getting" decorators is that they are not in
> > older books at all and newer books like Beginning Python from Novice
> > to Professional (c) 2005 Magnus Lie Hetland, that I own, devote almost
> > nothing to them. Out of 640 pages they are only mentioned
> > in one paragraph that is in a section titled "Static Methods and Class
> > Methods",(and followed by a class example with @staticmethod and
> > @classmethod).
>
> > So it seems like Magnus Lie Hetland didn't think they were very
> > important and he had Professional in his book title.
>
> I consider "core features of a language" the features that are part of the
> specification and implementation. Neither do I care if there is anecdotal
> evidence of prior usage in other languages, nor who or who not thinks they
> are important enough to be dealt with in a book.

By that definition isn't anything that is part of a language a core
feature?  Weren't we talking about basic features?

>
> And above all, I don't consider the time things have been around _without_
> any feature as proof of their irrelevance - or do you consider cars being
> not core to western culture because they only have been around about 100
> years, whereas horses have been there for thousands of years? Happy riding,
> cowboy!

A relevant analogy would talk about a feature of cars that was not on
them in the beginning but has been added later and whether it was a
basic (or now, core) feature. Your definition of core feature given
above means that anything on a car when it comes out of the factory is
a core feature.

>
> Python 2.4 has been released in 2003, btw - so decorators are around for 4
> years now.
>
> So unless you come up with a definition of "core feature of a language" that
> someone respectable in the CS-community wrote that features "time being
> around" or "random book authors consider worthy" or "persons lacking the
> motivation to really dig into do finally get it", I consider your
> definition worthless. Agreed?
>

Since you defined a core feature (haven't seen your definition of a
basic feature) as anything in the specification or implementation, I
agree that it makes sense for you to disregard anything that limits
core features to something less than everything.


> >> Besides, those 'several language designers' seem to think that the
> >> introduction of keywords isn't enough, but a general purpose annotation
> >> scheme seems to be viable - or how do you explain e.g. JDK 1.5
> >> Annotations?
>
> > I certainly wouldn't call them a basic language feature. Java 1.0 came
> > out in January 1996, Java 1.5 in September 2004. It doesn't appear
> > that the language designer of Java, James Gosling, is still at the
> > wheel or BDFL. But yes, Java is showing signs of "complexity creep".
> > You'll be happy to know that I really dislike the C++ template syntax
> > and Java has decided to add something similar.
>
> Again, your anecdotal language feature definition is nonsense.
>
> By the way, considering generics and C++-templates as "something similar"
> shows the inclined beholder that there are other languages out there you
> don't really understand.

For me understanding is all I can hope to attain. Really understanding
is something I must yield to the corps d'elite.




From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Tue Sep 11 13:41:43 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Tue, 11 Sep 2007 19:41:43 +0200
Subject: mod_python and pysvn
References: <1189525797.361829.69380@g4g2000hsf.googlegroups.com>
	<mailman.392.1189526179.2658.python-list@python.org>
Message-ID: <5ko2anF4iuuiU1@mid.individual.net>

Tim Golden wrote:
> Sjoerd wrote:

>> ClientError: Unable to open an ra_local session to URL
>> Unable to open repository 'file:///P:/tools/builds/repository'
>> 
>> does anyone know how I can fix this?
> 
> Usually means that the process which Apache is running under
> (may well be LocalSystem) doesn't know about or doesn't have
> access to p:/tools etc. 

Isn't this an SVN client error? Seems to me that the repository URL
is invalid.

Tim, try accessing the repository using svn list from the command
line.

Regards,


Bj?rn

-- 
BOFH excuse #350:

paradigm shift...without a clutch



From lasses_weil at klapptsowieso.net  Thu Sep 13 12:37:24 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Thu, 13 Sep 2007 18:37:24 +0200
Subject: Help to start python
In-Reply-To: <1189694381.957459.232350@y42g2000hsy.googlegroups.com>
References: <1189693144.493878.130220@w3g2000hsg.googlegroups.com>
	<1189693433.545822.89580@o80g2000hse.googlegroups.com>
	<1189694381.957459.232350@y42g2000hsy.googlegroups.com>
Message-ID: <46e96744$0$7702$9b4e6d93@newsspool2.arcor-online.net>

python_lover wrote:
> Please guide me some good sites to start web based programing on
> python.
> 

Here's a good one:
<http://www.google.de/search?hl=de&q=python%20web%20programming&btnG=Google-Suche&meta=>

Always remember: GIYF
If you don't know what that means: 
<http://www.google.de/search?hl=de&q=GIYF&btnG=Google-Suche&meta=>

/W


From bignose+hates-spam at benfinney.id.au  Wed Sep 26 05:30:53 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 26 Sep 2007 19:30:53 +1000
Subject: setuptools without unexpected downloads
References: <87ejgmklep.fsf@benfinney.id.au> <878x6ukkvq.fsf@benfinney.id.au>
	<5luhb0Faal8aU1@mid.uni-berlin.de> <874phhlupi.fsf@benfinney.id.au>
	<5lumarFae888U1@mid.uni-berlin.de>
Message-ID: <87ve9xkc36.fsf@benfinney.id.au>

"Diez B. Roggisch" <deets at nospam.web.de> writes:

> Ben Finney wrote:
> > How would I modify my 'setup.py' script so that its default
> > behaviour, when dependencies are not met, is not "download and
> > install dependencies via setuptools" but instead "exit with error
> > message"?
> 
> easy_install has the --no-deps commandline argument.

As am I.

> I'm not sure if that is triggerable from inside setup.py

Thanks for this answer.

> - but in the end, you wanted user choice, didn't you?

No. In the end, I want the default to be as described above. User
choice is desirable, but not necessary for this requirement.

> Generally speaking, I think the real problem here is the clash
> between "cultures" of dependency-handling. But it's certainly beyond
> setuptools scope to cope with every imaginable package management
> system out there, and provide means to trigger an installation of
> say e.g. debian packages that are needed.

Indeed, and that's beyond the scope of what I'm asking about.

-- 
 \        "As soon as I get through with you, you'll have a clear case |
  `\                for divorce and so will my wife."  -- Groucho Marx |
_o__)                                                                  |
Ben Finney


From ptmcg at austin.rr.com  Mon Sep 24 16:01:52 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Mon, 24 Sep 2007 13:01:52 -0700
Subject: Nested For and While Statements
In-Reply-To: <1190662087.403000.16290@g4g2000hsf.googlegroups.com>
References: <1190662087.403000.16290@g4g2000hsf.googlegroups.com>
Message-ID: <1190664112.564911.13480@57g2000hsv.googlegroups.com>

On Sep 24, 2:28 pm, kou... at hotmail.com wrote:
> I start my code with some constants then a while statement.  But I
> have some For statements towards the end within the While statement
> where I start getting some errors.  I'm hoping I won't have to post my
> code, but it looks something like this:
>
> Import os, string
>
> while this:
>
>      All Code indented like it should
>
>      Last line in While.
>
>            For i in range(1)
>                 class = []
>                 class2 = []
>                 For i in range(2)
>                      Do this
>                      And this
>                      And that.
>
>                      Next Line hits snag here?  Where should this line
> be?

Why are the for loops further indented than the body of the while?  If
they are part of the while, "For i in range(1)" should line up with
"Last line in While."  If they are not part of the while, but come
after, then "For i in range(1)" should line up with "while this:".

Also, as James Stroud said, your for loop indexes are the same
variable.

-- Paul



From mensanator at aol.com  Sun Sep 16 17:54:39 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: Sun, 16 Sep 2007 14:54:39 -0700
Subject: Try this
In-Reply-To: <mailman.621.1189970593.2658.python-list@python.org>
References: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>
	<13eqsdfsfvsa16f@corp.supernews.com>
	<1189969529.652871.19280@50g2000hsm.googlegroups.com>
	<mailman.621.1189970593.2658.python-list@python.org>
Message-ID: <1189979679.969074.216490@y42g2000hsy.googlegroups.com>

On Sep 16, 2:22?pm, Steve Holden <st... at holdenweb.com> wrote:
> mensana... at aol.com wrote:
> > On Sep 16, 1:10?pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> >> On Sun, 16 Sep 2007 01:46:34 -0700, GeorgeRXZ <george... at gmail.com>
> >> declaimed the following in comp.lang.python:
>
> >>> Then Open the Notepad and type the following sentence, and save the
> >>> file and close the notepad. Now reopen the file and you will find out
> >>> that, Notepad is not able to save the following text line.
> >>> Well you are speed
> >>> This occurs not only with above sentence but any sentence that has
> >>> 4 3 3 5 (sequence of characters: Well=4 you=3 are=3 speed=5)
> >>         I tried. I also opened the saved file in SciTE...
> >> And the text WAS there...
>
> >>         It is Notepad that can not properly render what it,
> >> itself, saved.
>
> > C:\Documents and Settings\mensanator\My Documents>type huh.txt
> > Well you are speed
>
> > Yes, file was saved correctly.
> > But reopening it shows 9 unprintable characters.
> > If I copy those to a new file (huh1.txt):
>
> > C:\Documents and Settings\mensanator\My Documents>type huh1.txt
> > ?????????
>
> > But wait...the new file is 20 characters, not 9.
>
> > 09/16/2007  01:44 PM                18 huh.txt
> > 09/16/2007  01:54 PM                20 huh1.txt
>
> > C:\Documents and Settings\mensanator\My Documents>dump huh.txt
> > huh.txt:
> > 00000000  5765 6c6c 2079 6f75 2061 7265 2073 7065 Well you are spe
> > 00000010  6564                                    ed
>
> > Here's what it's actually doing:
>
> > C:\Documents and Settings\mensanator\My Documents>dump huh1.txt
> > huh1.txt:
> > 00000000  fffe 5765 6c6c 2079 6f75 2061 7265 2073 .~Well you are s
> > 00000010  7065 6564                               peed
>
> One word: Unicode.
>
> The "open" and "save" dialogs allow you to specify an encoding.

And the encoding specified was ANSI.

> If you
> specify Unicode the you will get what you see above.

And if you specify ANSI _before_ you click the file name,
the specification switches to Unicode and has to then
be manually switched back to ANSI.

> If you specify ANSI
> you will get the text you entered.

It's still a bug in the "open" dialog.

>
> By the way, this has precisely what to do with Python?

I've been known to use Notepad to create Python
source code.

>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
>
> Sorry, the dog ate my .sigline- Hide quoted text -
>
> - Show quoted text -




From sajmikins at gmail.com  Wed Sep 26 17:01:01 2007
From: sajmikins at gmail.com (Simon Forman)
Date: Wed, 26 Sep 2007 14:01:01 -0700
Subject: Matplotlib TkAgg WindowsXP ImportError
In-Reply-To: <1190827160.282738.293770@k79g2000hse.googlegroups.com>
References: <1190827160.282738.293770@k79g2000hse.googlegroups.com>
Message-ID: <1190840461.990352.152900@k79g2000hse.googlegroups.com>

On Sep 26, 1:19 pm, Simon Forman <sajmik... at gmail.com> wrote:
> Hello,
>
> I just installed Matplotlib (and NumPy) on a windows XP machine, and
> I'm getting the following traceback when I try to use the TkAgg
> backend.
>
> Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit
> (Intel)] on
> win32
> Type "help", "copyright", "credits" or "license" for more information.>>> import matplotlib
> >>> matplotlib.use('TkAgg')
> >>> from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
>
> Traceback (most recent call last):
>  File "<stdin>", line 1, in <module>
>  File "C:\Python25\Lib\site-packages\matplotlib\backends
> \backend_tkagg.py",
> line 8, in <module>
>    import tkagg                 # Paint image to Tk photo blitter
> extension
>  File "C:\Python25\lib\site-packages\matplotlib\backends\tkagg.py",
> line 1, in <module>
>    import _tkagg
> ImportError: DLL load failed: The specified module could not be found.
>
>
>
> I found one old (2004) posthttp://mail.python.org/pipermail/python-list/2004-April/258963.html
> that seems to indicate that some sort version mismatch of the Tk/Tcl
> libraries may be to blame.  But I don't know how to diagnose that or
> what to do about it.
>
> FWIW, I installed using matplotlib-0.90.1.win32-py2.5.exe and
> numpy-1.0.3.1.win32-py2.5.exe.
>
> Thanks in advance for any help.
> Sincerely,
> ~Simon


Ah, nevermind.  I was missing MSVCP71.dll. Once I included that in the
system folder matplotlib ran fine.

Sorry for the "noise".
~Simon



From raj.amal at gmail.com  Fri Sep 28 00:40:59 2007
From: raj.amal at gmail.com (Amal)
Date: Fri, 28 Sep 2007 10:10:59 +0530
Subject: ImportError: /usr/lib/python2.4/site-packages/_xmlplus/parsers/pyexpat.so:
	undefined symbol: PyUnicodeUCS4_Decode
Message-ID: <3bfbb0bb0709272140n394315ddu2266eff99840db44@mail.gmail.com>

When I am compiling some code, I am getting the following the above
mentioned error. So how can i go about solving this issue.

Should I recompile python using -enable-unicode=UCS4 option.  Is there no
other way to solve this issue.

Amal.
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From kay.schluehr at gmx.net  Tue Sep 18 11:46:24 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Tue, 18 Sep 2007 08:46:24 -0700
Subject: Metatest 0.1.0
In-Reply-To: <mailman.721.1190126947.2658.python-announce-list@python.org>
References: <mailman.721.1190126947.2658.python-announce-list@python.org>
Message-ID: <1190130384.753009.142150@i13g2000prf.googlegroups.com>

On Sep 18, 3:55 pm, Jonathan Fine <jf... at pytex.org> wrote:
> Hello
>
> This announcement also appears on the Metatest web sitehttp://metatest.sourceforge.net
>
> ===
> *** Metatest - a Python test framework
>
> Metatest is a simple and elegant Python framework for writing tests.
>
> Metatest is mostly about writing tests and by design is not tied to any
> particular test runner. Hence the name.
>
> Here's how to write some tests using Metatest. We can think of the tests
> as an executable specification.
>
>      from metatest.py.mymod import plus, Point
>
>      # Function plus adds two numbers.
>      plus(2, 2) == 4
>      plus(2, '', _ex=TypeError)
>
>      # Class Point represent a point in the plane.
>      p = Point(2, 5)
>      p.x == 2
>      p.y == 5
>      p.area == 10
>
> And here's one way to run them.
>
>      if __name__ == '__main__':
>          import metatest
>          metatest.run()
>
> It's not hard to write an adapter that will run these tests in a
> different test runner framework.
>
> We gave a talk about Metatest at PyCon UK 2007 and here are the slides
> (HTML).
>      http://www.pyconuk.org
>      http://metatest.sourceforge.net/doc/pyconuk2007/metatest.html
>
> Please visit Sourceforge to download Metatest.
>      http://sourceforge.net/project/showfiles.php?group_id=204046
>
> --
> Jonathan Fine

>From the HTML slides:

   Assertion tests are easy to write but report and run poorly.

I tend to think this is a prejudice that leads to ever more ways to
write tests perform test discoveries, invent test frameworks etc.

When I thought about organizing my tests for EasyExtend I was seeking
for a strategy being adapted to my own behaviour. The very first step
I made when creating a new language, modifying a grammar rule,
changing the Transformer etc. was starting an interactive shell and
typing some commands. This is just checking out or smoke testing my
application and I wanted to reproduce it. So I recorded the
interactive shell session and replayed it as another shell session. I
enabled to set breakpoints in the logged output and implemented a
command for proceeding the replay.

Then I discovered I actually wrote an interactive test runner. I don't
have to care for all the exceptions being thrown in the session and
don't care for cleanups but just assign parts of the session as tests
using assert for getting an overview at the end. The only additonal
command I implemented was raises to capture the side-effect of raising
an exception.

So I'm going to argue here that there isn't anything particular about
writing/coding a test ( planning tests, specifying tests, reviewing a
testspecification etc. are another issue ). Instead you can keep a
seemingly unrelated practice and turn it into a test by a tiny
signification.



From theller at ctypes.org  Fri Sep  7 13:58:00 2007
From: theller at ctypes.org (Thomas Heller)
Date: Fri, 07 Sep 2007 19:58:00 +0200
Subject: py2exe - change name of exe created
In-Reply-To: <1189182302.680374.172940@k79g2000hse.googlegroups.com>
References: <1189164934.705547.156670@r34g2000hsd.googlegroups.com>	<1189165183.727542.47640@19g2000hsx.googlegroups.com>	<mailman.224.1189174965.2658.python-list@python.org>
	<1189182302.680374.172940@k79g2000hse.googlegroups.com>
Message-ID: <fbs3f9$gqh$1@sea.gmane.org>

imageguy schrieb:
[...]
>> > Note that every thing works fine with this and creates an exe program
>> > called
>> > "myprogram.exe"
>>
>> > I would like to setup program to create an output called;
>> > "MyBestProgram.exe"
>>
>> > IS that at all possible ?
>>
>> Yes.  Use a 'dest_base' key in the dictionary, like so:
>>
>> > setup(windows = [{"script":"myprogram.py",
>> >                    "icon_resources":[(0,"nabbitt.ico")],
>>
>>                      "dest_base": "MyBestProgram",>                     "other_resources": [(24,1,manifest)]}
>>
>> ...
>>
>> 'dest_base' is the basename of the destination program that py2exe creates.
>>
>> Thomas- Hide quoted text -
>>
>> - Show quoted text -
> 
> Thanks.
> I really appreciate the response.
> Where would I find that in the docs ?  Thought I had searched
> everywhere.


If you have searched everywhere then it isn't in the docs.  You can probably
learn a lot about py2exe when you try out and study the supplied samples; they
are in the Lib\site-packages\py2exe\samples subdirectories.

The next step would be to consult the source code ;-)

The current maintainer of pyexe, Jimmy Retzlaff, seems to have disappeared
from the net as it seems; I hope he is well.  So, the current state of py2exe
itself and the documentation is not so good; OTOH there is a wiki on
www.py2exe.org where anyone can contribute tips tricks and docs.

Thomas



From steve at REMOVE-THIS-cybersource.com.au  Tue Sep 25 08:45:30 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Tue, 25 Sep 2007 12:45:30 -0000
Subject: sorting a list numbers stored as strings
References: <mailman.1028.1190696259.2658.python-list@python.org>
Message-ID: <13fi0na7rhfl90d@corp.supernews.com>

On Tue, 25 Sep 2007 12:46:54 +0800, Delaney, Timothy (Tim) wrote:

> Carsten Haese wrote:
> 
>> On Mon, 2007-09-24 at 19:58 +0800, Delaney, Timothy (Tim) wrote:
>>> I'm sure that in some version of Python it would have given a
>>> ValueError (due to the default radix being 0) but it appears to have
>>> changed to a default radix of 10 somewhere along the way.
>> 
>> Not even Python 1.5.2 seems to have a problem with leading zeroes:
>> 
>> Python 1.5.2 (#1, Nov  6 1999, 14:53:40) [C] on sco_sv3 Copyright
>> 1991-1995 Stichting Mathematisch Centrum, Amsterdam
>>>>> int("08")
>> 8
> 
> Yep - appears I must have been misremembering from another language
> (dunno which) or I misinterpreted the docs.

I also remember something in Python about leading zeroes leading to 
"surprising" effects... ah, I got it!


>>> int("020")
20
>>> 020
16


-- 
Steven.



From deets at nospam.web.de  Wed Sep 26 09:24:52 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 26 Sep 2007 15:24:52 +0200
Subject: Test-driven development and code size
References: <fdai0b$7iv$1@news.lysator.liu.se>
	<5ls95aF9pq3gU1@mid.uni-berlin.de>
	<mailman.1054.1190736712.2658.python-list@python.org>
	<fdborn$h5q$1@news.lysator.liu.se>
	<87ejgmmgc2.fsf_-_@benfinney.id.au>
	<fddcnp$sn9$1@news.lysator.liu.se>
Message-ID: <5lv4t4Faeqk8U1@mid.uni-berlin.de>

Joel Hedlund wrote:

>> test-driven development merely means that you take that test case and
>> *keep it* in your unit test. Then, once you're assured that you will
>> find the bug again any time it reappears, go ahead and fix it.
> 
> My presumption has been that in order to do proper test-driven development
> I would have to make enormous test suites covering all bases for my small
> hacks before I could getting down and dirty with coding (as for example in
> http://www.diveintopython.org/unit_testing). This of course isn't very
> appealing when you need something done "now". But if I understand you
> correctly, if I would formalize what little testing I do, so that I can
> add to a growing test suite for each program as bugs are discovered and
> needs arise, would you consider that proper test-driven development? (or
> rather, is that how you do it?)

Sounds good to me. IMHO there are two ways one gathers tests:

 - concrete bugs appear, and one writes a test that reproduces the bug &
eventually after the fix runs smoothly

 - new features are planned/implemented, and the tests accompany them right
from the start, to allow .. .well, to test them :)

I always found it difficult to "just think" of new tests. Of course if you
_start_ with TDD, point two is applied right from the start and should
apply.

Diez


From sjmachin at lexicon.net  Mon Sep 24 18:03:03 2007
From: sjmachin at lexicon.net (John Machin)
Date: Mon, 24 Sep 2007 15:03:03 -0700
Subject: Newbie completely confused
In-Reply-To: <mailman.998.1190649076.2658.python-list@python.org>
References: <mailman.876.1190392492.2658.python-list@python.org>
	<1190434069.108503.281930@y42g2000hsy.googlegroups.com>
	<mailman.998.1190649076.2658.python-list@python.org>
Message-ID: <1190671383.685768.237010@d55g2000hsg.googlegroups.com>

On Sep 25, 1:51 am, Jeroen Hegeman <jeroen.hege... at gmail.com> wrote:
> > Your code does NOT include any statements that could have produced the
> > above line of output -- IOW, you have not posted the code that you
> > actually ran.
>
> Oh my, I must have cleaned it up a bit too much, hoping that people
> would focus on the issue instead of the formatting of the output
> strings! Did you miss your morning coffee???

The difference was not a formatting difference; it was complete
absence of a statement, raising the question of what other non-obvious
differences there might be.

You miss the point: if it is obvious that the posted code did not
produce the posted output (common when newbies are thrashing around
trying to solve a problem), some of the audience may not bother trying
to help with the main issue -- they may attempt to help with side
issues (as I did with the fugly code bloat) or just ignore you
altogether.

>
> > Your code is already needlessly monstrously large.
>
> Which I realised and apologised for beforehand.

An apology does not change the fact that the code was needlesly large
(AND needed careful post-linefolding reformatting just to make it
runnable) and so some may not have bothered to read it.

>
> > And Python 2.5.1 does what? Strike 3.
>
> Hmm, I must have missed where it said that you can only ask for help
> if you're using the latest version...

You missed the point again: that your problem may be fixed in a later
version.

> In case you're wondering, 2.5.1
> is not _really_ that wide-spread as most of the older versions.

I wasn't wondering. I know. I maintain a package (xlrd) which works on
Python 2.5 all the way back to 2.1. It occasionally has possibly
similar "second iteration goes funny" issues (e.g. when reading 120MB
Excel spreadsheet files one after the other). You mention that
removing some attributes from a class may make your code stop
exhibiting cliff-face behaviour. If you can produce two versions of
your code that actually demonstrate the abrupt change, I'd be quite
interested in digging into it, to our possible mutual benefit.

> > For handling the bit extraction stuff, either
> [snip]
> > (b) do a loop over the bit positions
>
> Now that sounds more useful. I'll give that a try.
>

I'm glad you found something possibly more useful in my posting :-)

Cheers,
John




From listserver at tdw.net  Thu Sep  6 11:29:47 2007
From: listserver at tdw.net (Tim Williams)
Date: Thu, 6 Sep 2007 16:29:47 +0100
Subject: startswith( prefix[, start[, end]]) Query
In-Reply-To: <46e00d7e$0$16413$426a74cc@news.free.fr>
References: <1189087752.538726.101350@r29g2000hsg.googlegroups.com>
	<46e00d7e$0$16413$426a74cc@news.free.fr>
Message-ID: <9afea2ac0709060829y507806d6hc1bd94111a69b938@mail.gmail.com>

On 06/09/07, Bruno Desthuilliers
<bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote:
>
> You may want to try with a regexp, but I'm not sure it's worth it (hint:
> the timeit module is great for quick small benchmarks).
>
> Else, you could as well write your own testing function:
>
> def str_starts_with(astring, *prefixes):
>   startswith = astring.startswith
>   for prefix in prefixes:
>     if startswith(prefix):
>       return true
>   return false
>
> for line in f:
>   if str_starts_with(line, 'abc, 'de', 'xxx'):
>     # CODE HERE
>

Isn't slicing still faster than startswith?    As you mention timeit,
then you should probably add slicing to the pot too :)

if astring[:len(prefix)] == prefix:
     do_stuff()

:)


From python at hope.cz  Tue Sep 25 10:31:58 2007
From: python at hope.cz (Johny)
Date: Tue, 25 Sep 2007 07:31:58 -0700
Subject: HTTPS  request
Message-ID: <1190730718.341771.215970@19g2000hsx.googlegroups.com>

If I need to log in to a site using https protocol must I use
certification file and key file?
The class HTTPSConnection syntax is
class HTTPSConnection( host[, port, key_file, cert_file])

and I do not know if it is nescessary or not.
Thanks for help.
L.



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Sep 28 06:26:33 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 28 Sep 2007 12:26:33 +0200
Subject: ValueError: too many values to unpack,>>>
In-Reply-To: <mailman.1187.1190923345.2658.python-list@python.org>
References: <mailman.1169.1190911027.2658.python-list@python.org>	<5m24sfFatlbuU1@mid.uni-berlin.de>	<46FBED79.6070207@comcast.net>
	<fdgs2t$8ni$1@sea.gmane.org>	<mailman.1183.1190921081.2658.python-list@python.org>	<46fc09ae$0$22333$426a74cc@news.free.fr>
	<mailman.1187.1190923345.2658.python-list@python.org>
Message-ID: <46fcd6ae$0$6780$426a74cc@news.free.fr>

J. Clifford Dyer a ?crit :
> On Thu, Sep 27, 2007 at 09:50:26PM +0200, Bruno Desthuilliers wrote
> regarding Re: ValueError: too many values to unpack,>>>:
>> Shawn Minisall a ?crit :
(snip)
>>> I did and it printed everything up until the 3rd line with 3
>>> numbers for deposits.  I have since figured it out...the teacher
>>> put in an extra tab after the last value so python thought it was
>>> 4 values for three.  I went back into the file and deleted the
>>> extra tab after the 3rd number and saved it...now it's working
>>> fine. I'm going to kill her...

>> You'd better learn how to deal with "this-cant-happen-here"
>> situation, because it's how it is in real-life.
>> 
> 
> And preferably learn how to deal with it in your code, not in the
> data that's given to you.

Thanks for clarifying this point, which is of course what I meant.



From tokland at gmail.com  Sat Sep 15 13:20:48 2007
From: tokland at gmail.com (tokland at gmail.com)
Date: Sat, 15 Sep 2007 17:20:48 -0000
Subject: how to join array of integers?
In-Reply-To: <13eo0pbiab4spdf@corp.supernews.com>
References: <1189859762.563599.269270@g4g2000hsf.googlegroups.com>
	<a23effaf0709150551g19c611eqe1c912acf02306d3@mail.gmail.com>
	<mailman.577.1189864628.2658.python-list@python.org>
	<13eo0pbiab4spdf@corp.supernews.com>
Message-ID: <1189876848.763453.8190@o80g2000hse.googlegroups.com>

Grant Edwards ha escrito:

> > Or, if you happen to like the itertools modules:
> >
> > from itertools import imap
> > ",".join(imap(str, [1, 2, 3]))
>
> It's nice people have invented so many ways to spell the
> builting "map" ;)

Did you wonder why the Python developers bother to implement "imap" if
"map" was already there?

> >>> ",".join(map(str,[1,2,3]))
> '1,2,3'

Of course the result is the same, but "map" returns a list while
"itertools.imap" returns an iterator. Fortunately, "map" will become
lazy on Py3000:

http://mail.python.org/pipermail/python-3000/2007-August/009207.html

As you said, it won't be noticeable for short lists, but it's a good
programming practice to use generators instead of lists (if you don't
really need a list!)

arnau



From gagsl-py2 at yahoo.com.ar  Mon Sep 10 04:49:11 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 10 Sep 2007 01:49:11 -0700
Subject: Python syntax wart
In-Reply-To: <5ki2sdF3nr68U1@mid.individual.net>
References: <fbvvil$7dj$1@lust.ihug.co.nz><5khh6nF3i5nuU1@mid.uni-berlin.de>
	<46E390B7.2080808@web.de> <fc0518$aa2$5@lust.ihug.co.nz>
	<5ki2sdF3nr68U1@mid.individual.net>
Message-ID: <1189414151.003351.229860@r34g2000hsd.googlegroups.com>

On 9 sep, 08:14, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:

> How can a statement be two-dimensional? Like a two-dimensionalTuringMachine?

Do you know the Befunge language? Program flow is not lineal but along
a 2D grid. There are variants over toroids and more bizarre surfaces,
even using 3D.

"Befunge is believed to be the first two-dimensional, ASCII-based,
general-purpose programming language."
<http://www.esolangs.org/wiki/Befunge>

--
Gabriel Genellina



From mensanator at aol.com  Thu Sep 13 16:59:07 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: Thu, 13 Sep 2007 13:59:07 -0700
Subject: Decimal formatting
In-Reply-To: <1189716651.810481.260850@y42g2000hsy.googlegroups.com>
References: <1189716651.810481.260850@y42g2000hsy.googlegroups.com>
Message-ID: <1189717147.538624.189890@19g2000hsx.googlegroups.com>

On Sep 13, 3:50 pm, Harlin Seritt <harlinser... at yahoo.com> wrote:
> Cant believe I have to post this and get help... and can't believe I
> couldnt Google it reasonably well enough... I need to take a float
> variable and have it display as a string to always have two decimal
> places:
>
> 12.3333 -> 12.33
> 1.0 -> 1.00
> etc...
>
> Anyone willing to help with this one?

>>> a
12.33333
>>> print '%0.2f' % a
12.33
>>> a = 1
>>> print '%0.2f' % a
1.00


>
> thanks,
>
> Harlin




From http  Thu Sep 20 19:30:04 2007
From: http (Paul Rubin)
Date: 20 Sep 2007 16:30:04 -0700
Subject: I could use some help making this Python code run faster using
	only Python code.
References: <1190325588.608625.259800@q3g2000prf.googlegroups.com>
Message-ID: <7xbqbwrk3n.fsf@ruckus.brouhaha.com>

Python Maniac <raychorn at hotmail.com> writes:
> I am new to Python however I would like some feedback from those who
> know more about Python than I do at this time.

Use the array module and do 32-bit or 64-bit operations with it.
See http://nightsong.com/phr/crypto/p3.py for a more serious
encryption module written that way.


From ben at benfinney.id.au  Wed Sep 26 02:09:34 2007
From: ben at benfinney.id.au (Ben Finney)
Date: Wed, 26 Sep 2007 16:09:34 +1000
Subject: setuptools without unexpected downloads
Message-ID: <87ejgmklep.fsf@benfinney.id.au>

Howdy all,

The Python distutils has been built upon by setuptools, providing
features asked for by many developers.

One of these is the ability for the 'setup.py' program to declare
package dependencies in a fairly standardised way, and determine if
they're met before attempting to install the package. This is good for
distributing one's software to folks whose operating system is stuck
somewhere in the mid-20th century by not providing such a dependency
system.

However, one of the areas where setuptools clashes with existing
package dependency systems is its default of *downloading* those
packages declared as dependencies, and installing them in its own way
getting in the way of the existing package dependency system.

How can I, as the distributor of a package using setuptools, gain the
benefits of dependency declaration and checking, without the drawback
of unexpected and potentially unwanted download and installation?

I know that a user can choose (if they've read the mass of setuptools
documentation) to disallow this download-and-install-dependencies
behaviour with a specific invocation of 'setup.py'. But how can I
disallow this from within the 'setup.py' program, so my users don't
have to be aware of this unexpected default behaviour?

-- 
 \       "I disapprove of what you say, but I will defend to the death |
  `\     your right to say it."  -- Evelyn Beatrice Hall, _The Friends |
_o__)                                               of Voltaire_, 1906 |
Ben Finney


From python at cx.hu  Tue Sep  4 16:36:37 2007
From: python at cx.hu (Ferenczi Viktor)
Date: Tue, 4 Sep 2007 22:36:37 +0200
Subject: doctest and decorators
In-Reply-To: <2bfa72fa0709041329i14b5b547i2eb85250f7547da@mail.gmail.com>
References: <2bfa72fa0709041329i14b5b547i2eb85250f7547da@mail.gmail.com>
Message-ID: <200709042236.37712.python@cx.hu>

> I assume this is a FAQ, but I couldn't find much helpful information
> googling. I'm having trouble with doctest skipping my functions, if I'm
> using decorators (that are defined in a separate module). If I'm
> understanding what is happening correctly, it's because doctest checks if
> the function's func_global attribute is the same as the module's __dict__
> attribute. The decorator in question returns a wrapping function, though,
> so this check fails.
> What are some solutions to this? I can define __test__, but it seems rather
> cumbersome.

Please take a look at the documentation of the functools standard module in 
the Python manual, especially the wraps decorator. It could probably help.

Viktor


From kollasb+news at gmail.com  Sun Sep 23 01:57:58 2007
From: kollasb+news at gmail.com (Suresh Babu Kolla)
Date: Sun, 23 Sep 2007 05:57:58 GMT
Subject: subprocess -popen - reading stdout from child - hangs
In-Reply-To: <1190518129.356844.242710@19g2000hsx.googlegroups.com>
References: <1190518129.356844.242710@19g2000hsx.googlegroups.com>
Message-ID: <GfnJi.35163$RX.24106@newssvr11.news.prodigy.net>

gregpinero at gmail.com wrote:
> Let's say I have this Python file called loop.py:
> 
> import sys
> print 'hi'
> sys.stdout.flush()
> while 1:
>     pass
> 
> And I want to call it from another Python process and read the value
> 'hi'.  How would I do it?
> 
> So far I have tried this:
> 
>>>> proc = subprocess.Popen('python /home/chiefinnovator/loop.py',shell=True,stdin=subprocess.PIPE,stdout=subprocess.PIPE)
>>>> proc.stdout.read()
> 

 From python documentation

`read([size])'
      Read at most SIZE bytes from the file (less if the read hits `EOF'
      before obtaining SIZE bytes).  If the SIZE argument is negative or
      omitted, read all data until `EOF' is reached.  The bytes are
      returned as a string object.  An empty string is returned when
      `EOF' is encountered immediately.  (For certain files, like ttys,
      it makes sense to continue reading after an `EOF' is hit.)  Note
      that this method may call the underlying C function `fread()' more
      than once in an effort to acquire as close to SIZE bytes as
      possible. Also note that when in non-blocking mode, less data than
      what was requested may be returned, even if no SIZE parameter was
      given.

  read call in your code is waiting for EOF, since the script never exits
  EOF is not reached.

  Change read code to

  proc.stdout.readline()

  or

  remove while 1 loop from loop.py.

HTH
Kolla


From mccredie at gmail.com  Mon Sep 10 01:29:38 2007
From: mccredie at gmail.com (Matt McCredie)
Date: Sun, 9 Sep 2007 22:29:38 -0700
Subject: help - error when trying to call super class method
In-Reply-To: <584090.28836.qm@web51105.mail.re2.yahoo.com>
References: <584090.28836.qm@web51105.mail.re2.yahoo.com>
Message-ID: <9e95df10709092229k321d46cbvaded47cdddc1362@mail.gmail.com>

> I am trying to extend list class to build a stack class -- see code below---
> but I got an error when I try to call len method from list class here.. why?
> Thanks in advance!

Jeff did a good job of answering your questions. I just wanted to note
that your pop is broken, but that doesn't matter since list already
has a pop method that will do what you want. Actually it has a push
method that does what you want too, it is called `append'. If you
really want a push method, you could just do this:

[code]
>>> class Stack(list):
...     push = list.append
>>> s = Stack()
>>> s.push(1)
>>> s.push(2)
>>> s.push(3)
>>> s.pop()
3
>>> s.pop()
2
>>> s.pop()
1
[/code]

Matt


From no at spam.com  Mon Sep 10 14:47:40 2007
From: no at spam.com (Farshid Lashkari)
Date: Mon, 10 Sep 2007 11:47:40 -0700
Subject: C API (embedded Python): How to get and set named variables
In-Reply-To: <1189447804.880483.175290@50g2000hsm.googlegroups.com>
References: <1189447804.880483.175290@50g2000hsm.googlegroups.com>
Message-ID: <%igFi.98606$Vk6.77403@newsfe07.phx>

mrabens at gmail.com wrote:
>>From the C API (I'm using Python embedded), how can I get and set the
> value of named variables?  Right now, I'm using hacks like
> PyRun_SimpleString("foobar = 12\n"), but I'd really like to access the
> named objects directly.
> 

You can use the following C functions to set/get named attributes of an 
object:

PyObject_SetAttrString
PyObject_GetAttrString

If the attributes belong to the global scope of a module, then you can 
use "PyImport_AddModule" to get a handle to the module object. For 
example, if you wanted to get the value of an integer in the __main__ 
module named "foobar", you would do the following:

PyObject *m = PyImport_AddModule("__main__");
PyObject *v = PyObject_GetAttrString(m,"foobar");

int foobar = PyInt_AsLong(v);

Py_DECREF(v);

You will probably want to add some error checking in your code.

-Farshid


From gh at gregor-horvath.com  Tue Sep 11 13:26:26 2007
From: gh at gregor-horvath.com (Gregor Horvath)
Date: Tue, 11 Sep 2007 19:26:26 +0200
Subject: Python code-writing for the blind. Was (Re: newbie: stani's python
	editor if-else)
In-Reply-To: <1189531123.283413.160870@22g2000hsm.googlegroups.com>
References: <1189484688.520933.25000@22g2000hsm.googlegroups.com>
	<mailman.381.1189514109.2658.python-list@python.org>
	<46e6aa30$0$22433$426a74cc@news.free.fr>
	<1189531123.283413.160870@22g2000hsm.googlegroups.com>
Message-ID: <b32e4$46e6cfc2$547078de$7728@news.chello.at>

madzientist schrieb:

> 
> Is Python a bad choice for the blind programmer, as a result of a
> tight linkage between visual aspects of the code and its function ? I
> wish the site blindprogramming.com weren't so lifeless...

There was a thread regarding blind people and python indentation shortly:

http://groups.google.com/group/comp.lang.python/browse_thread/thread/80654a87bfa89e3b

Gregor


From zentraders at gmail.com  Tue Sep  4 18:39:21 2007
From: zentraders at gmail.com (Zentrader)
Date: Tue, 04 Sep 2007 15:39:21 -0700
Subject: Python is overtaking Perl
In-Reply-To: <1188925737.869396.316750@19g2000hsx.googlegroups.com>
References: <1188865943.238573.218750@w3g2000hsg.googlegroups.com>
	<20070904024908.b8aca60c.sulsa@gazeta.pl>
	<1188869347.102325.119830@w3g2000hsg.googlegroups.com>
	<IrCdnQkp_ds-JEHbnZ2dnUVZ_iydnZ2d@speakeasy.net>
	<1188873133.137684.147260@r29g2000hsg.googlegroups.com>
	<1188925737.869396.316750@19g2000hsx.googlegroups.com>
Message-ID: <1188945561.400276.186770@k79g2000hse.googlegroups.com>

>So, all the decline means is that the number of  searches
> for "Python programming" releative to all searches done is declining.

Which makes sense.  There are an many python tutorial/code snippet
sites, sites that list those type of python sites, as well as the
python.org site which means that a Google search is becoming less and
less necessary.  I think the language is gaining more people because
it's an excellent language and don't really care what rank it has.



From paul.hankin at gmail.com  Wed Sep 26 18:25:09 2007
From: paul.hankin at gmail.com (Paul Hankin)
Date: Wed, 26 Sep 2007 22:25:09 -0000
Subject: ~ bit-wise unary operator
In-Reply-To: <mailman.1138.1190844872.2658.python-list@python.org>
References: <mailman.1138.1190844872.2658.python-list@python.org>
Message-ID: <1190845509.225196.88460@19g2000hsx.googlegroups.com>

On Sep 26, 11:14 pm, Ladislav Andel <lad... at iptel.org> wrote:
> Hello,
> why ~ bit-wise unary operator returns -(x+1) and not bit inversion of
> the given integer?
>
> example:
> a = 7978
> a = ~a
> python returns -7979
>
> but I need to get back 57557 as in C language.
>
> which is also in binary
> 0001111100101010
> and inverted
> 1110000011010101
>
> Is here any other operator or do I have to write it on my own?

The size of int is an implementation detail in C, so you may not get
57557 (in fact, you're only likely to get that answer if a is an
unsigned short on any modern architecture. But if that's what you
want, try
def invert(x):
  return ~x & 0xffff

--
Paul Hankin



From nutsbreaker4 at gmail.com  Sat Sep 15 14:04:38 2007
From: nutsbreaker4 at gmail.com (nutsbreaker4 at gmail.com)
Date: Sat, 15 Sep 2007 11:04:38 -0700
Subject: World's most popular traveling destinations
Message-ID: <1189879478.488113.36740@k79g2000hse.googlegroups.com>

http://world-traveling-destinations.blogspot.com/



From gagsl-py2 at yahoo.com.ar  Wed Sep 12 23:52:14 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 13 Sep 2007 00:52:14 -0300
Subject: MemoryError on reading mbox file
References: <1189589259.662667.149730@w3g2000hsg.googlegroups.com>
	<1189607986.628841.215930@50g2000hsm.googlegroups.com>
Message-ID: <op.tykqdcc8x6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 12 Sep 2007 11:39:46 -0300, Istvan Albert  
<istvan.albert at gmail.com> escribi?:

> On Sep 12, 5:27 am, Christoph Krammer <redtige... at googlemail.com>
> wrote:
>
>>     string = self._file.read(stop - self._file.tell())
>> MemoryError
>
> This line reads an entire message into memory as a string. Is it
> possible that you have a huge email in there (hundreds of MB) with
> some attachment encoded as text?

Printing start,stop,stop-start inside that method would be an easy way to  
find if that is the case.

The following idea could help to fix it - at least, avoiding to read the  
whole message at once:
self._message_factory will eventually call the mailbox.Message  
constructor, which accepts a file object too (instead of a huge string).  
In that same module there is an utility class, _PartialFile ("A read-only  
wrapper of part of a file"). _mboxMMDF.get_file() does return a  
_PartialFile object, so I'd try this code (untested!):

     def get_message(self, key):
         """Return a Message representation or raise a KeyError."""
         msg = self._message_factory(self.get_file(key, True))
         msg.set_from(msg.get_unixfrom()[5:])
         return msg

-- 
Gabriel Genellina



From gagsl-py2 at yahoo.com.ar  Tue Sep 25 22:49:22 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 25 Sep 2007 23:49:22 -0300
Subject: Regular Expressions: Can't quite figure this problem out
References: <496954360709241737o6e42e7efk29886b5631f6ca2e@mail.gmail.com>
	<a49e45f50709241827i107d0acav28431853ef403702@mail.gmail.com>
	<496954360709241853w6bb6e813ved0ec4fc80304d51@mail.gmail.com>
	<op.ty6tjyfqx6zn5v@gabriel2.softlabbsas.com.ar>
	<496954360709241917m3801e4aavee29cfef7deaf41b@mail.gmail.com>
	<fd9rs6$8b2$1@sea.gmane.org>
	<496954360709241951h6901d60etf2c4b3b5ec759f2a@mail.gmail.com>
	<op.ty6ztgx0x6zn5v@gabriel2.softlabbsas.com.ar>
	<496954360709251421l578b9dfdwcc0e67d293ede1f3@mail.gmail.com>
Message-ID: <op.ty8p4kw2x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 25 Sep 2007 18:21:08 -0300, Robert Dailey <rcdailey at gmail.com>  
escribi?:

> One thing I noticed is that it is placing an arbitrary space between "  
> and
> />. For example:
>
>
> <root><frame type="image" /></root>
>
> Notice that there's a space between "image" and /></root>

Just remove the space in the replacement string:

>> py> print re.sub(r"<(\w+)([^>]*)></\1>", r"<\1\2 />", source)
                                                    ^
                                                    |

-- 
Gabriel Genellina



From apardon at forel.vub.ac.be  Thu Sep 27 02:49:31 2007
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 27 Sep 2007 06:49:31 GMT
Subject: sorteddict PEP proposal [started off as orderedict]
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>
	<1190753722.026806.254530@d55g2000hsg.googlegroups.com>
	<1190756003.292096.71130@o80g2000hse.googlegroups.com>
	<1190789981.385466.37870@57g2000hsv.googlegroups.com>
	<Xns99B760A3F5859duncanbooth@127.0.0.1>
	<87sl51lshd.fsf@mulj.homelinux.net>
	<1190799759.367001.106400@r29g2000hsg.googlegroups.com>
	<87fy11lo22.fsf@mulj.homelinux.net>
	<1190804538.469582.96950@22g2000hsm.googlegroups.com>
	<slrnffkjoa.hc2.apardon@rcpc42.vub.ac.be>
	<1190814263.104358.158090@n39g2000hsh.googlegroups.com>
Message-ID: <slrnffmkjq.hc2.apardon@rcpc42.vub.ac.be>

On 2007-09-26, Mark Summerfield <m.n.summerfield at googlemail.com> wrote:
> On 26 Sep, 13:22, Antoon Pardon <apar... at forel.vub.ac.be> wrote:
>>
>> Well you should decide what you want. In a previous exchange one of the
>> things that was wanted was that you could already seed a tree by using
>> key word arguments so that you could do the following:
>>
>> t=Tree(a=15, b=30)
>>
>> which would be equivallent to:
>>
>> t=Tree()
>> t.update(a=15,b=30)
>>
>> But with the above proposal
>>
>> t=Tree(cmp=cmp)
>>
>> is not equivallent to
>>
>> t=Tree()
>> t.update(cmp=cmp)
>>
>> So it seems the API needs some more sorting out.
>
> I think you missed some of the previous postings.

That is possible.
>
> The sorteddict API that has emerged so far is (1) apart from the
> constructor, everything is identical to dict, (2) the constructor
> takes the same args as sorted(), so if you want to seed with a dict or
> with keywords you write sorteddict(dict(a=1,b=2), ...), (or you could
> create a sorteddict and use update() since that takes the same args as
> dict's constructor).
>
> Could your AVLTree support cmp and keys and reverse?

It already supports cmp. Although for the moment it is done by
subclassing. Like the following.

class myTree(AVLTree):
  @staticmethod
  def cmp(a, b);
    return ....

I don't think adding support for keys will be difficult but it may be
tedious.

I would prefer not to support reverse because the effect can be acquired
by the other two and in contradiction with sorting, I think using it
will slow things down instead of speeding things up.

-- 
Antoon Pardon


From semanticist at gmail.com  Mon Sep 24 21:27:19 2007
From: semanticist at gmail.com (Miles)
Date: Mon, 24 Sep 2007 21:27:19 -0400
Subject: Regular Expressions: Can't quite figure this problem out
In-Reply-To: <496954360709241737o6e42e7efk29886b5631f6ca2e@mail.gmail.com>
References: <496954360709241737o6e42e7efk29886b5631f6ca2e@mail.gmail.com>
Message-ID: <a49e45f50709241827i107d0acav28431853ef403702@mail.gmail.com>

On 9/24/07, Robert Dailey <rcdailey at gmail.com> wrote:
> Hi,
>
> I'm attempting to create a regular expression that removes redundancy in
> empty XML elements. For example:
>
> <root></root>
>
> The regular expression would convert the XML above into:
>
>  <root/>

If you can guarantee that the XML is well-formed, then this should work:

pattern = r'<([^/>][^>]*(?<!/))></[^>]+>'
replace = r'<\1/>'

-Miles


From hat at se-162.se.wtb.tue.nl  Tue Sep 18 06:48:49 2007
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Tue, 18 Sep 2007 12:48:49 +0200
Subject: How can I know how much to read from a subprocess
References: <1190070896.332844.23080@22g2000hsm.googlegroups.com>
	<1190072376.600475.254260@y42g2000hsy.googlegroups.com>
Message-ID: <slrnfevb8h.299.hat@se-162.se.wtb.tue.nl>

On 2007-09-17, spam.noam at gmail.com <spam.noam at gmail.com> wrote:
> It seems that another solution is gobject.io_add_watch, but I don't
> see how it tells me how much I can read from the file - if I don't
> know that, I won't know the argument to give to the read() method in
> order to get all the data:
>
> http://www.pygtk.org/docs/pygobject/gobject-functions.html#function-gobject--io-add-watch
>

Usually, gobject only tells you that data is there (that is all it knows).
Therefore a read(1) should be safe.
If that is too slow, consider os.read() which reads all data available (afaik,
never tried it myself).

Albert


From gagsl-py2 at yahoo.com.ar  Sat Sep 29 02:04:09 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 29 Sep 2007 03:04:09 -0300
Subject: Bug: spurious indentation error
References: <33dffc910709282143y76151e66r2f8641ed2972661a@mail.gmail.com>
Message-ID: <op.tzei47apx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 29 Sep 2007 01:43:53 -0300, Mridula Ramesh  
<mridula.ccpl at gmail.com> escribi?:

> Lol, nope, I checked today too, and it happened again. Try running this  
> as a
> script, not from the prompt -

I got a SyntaxError on line 10 as expected.
After correcting it, I got an `IndentationError: expected an indented  
block` on line 23, due to a long line being wrapped onto the next line.

A syntax error may be reported some lines later than the actual mistake,  
if the following lines build a good construct. For example, a missing  
close parenthesis.

-- 
Gabriel Genellina



From steve at holdenweb.com  Tue Sep 18 11:51:20 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 18 Sep 2007 11:51:20 -0400
Subject: Using pseudonyms (was Re: Python 3K or Python 2.9?)
In-Reply-To: <fcop08$2ue$1@panix3.panix.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>	<46ee2d9d$0$26213$426a74cc@news.free.fr>	<fcn81q$g80$1@panix3.panix.com>	<46ef893c$0$21882$426a34cc@news.free.fr>
	<fcop08$2ue$1@panix3.panix.com>
Message-ID: <46EFF3F8.7000303@holdenweb.com>

Aahz wrote:
> In article <46ef893c$0$21882$426a34cc at news.free.fr>,
> Bruno Desthuilliers  <bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote:
>> Aahz a ?crit :
>>> In article <46ee2d9d$0$26213$426a74cc at news.free.fr>,
>>> Bruno Desthuilliers  <bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote:
>>>> But what, given that I'm an AOL user still thinking it's kewl to hide 
>>>> behind a pseudo, what else would you expect ?
>>> What exactly is a "pseudo", pray tell?
>> Sorry : a pseudonym (a nickname).
> 
> You apparently missed the thrust of my sarcasm.  You can't tell what is
> or is not a pseudonym online.  For all I know, "Bruno Desthulliers" is a
> pseudonym.  While I recognize that there is some social advantage to
> linking consistent identifiers with people, I have I think understandable
> irritation with people who insist that names follow certain patterns.
> 
> (For those joining only recently, my full legal name is "Aahz", which I
> changed from my former name precisely because of attitudes like Bruno's.)
> 
... coupled with a certain bloody-mindedness that forces you to rub 
people's noses in your ability to choose to do so? ;-)

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline


From xiaoyisheng at gmail.com  Thu Sep 13 04:48:45 2007
From: xiaoyisheng at gmail.com (Pacino)
Date: Thu, 13 Sep 2007 08:48:45 -0000
Subject: read part of jpeg file by pure python
In-Reply-To: <fcat76$vnc$1@news2.u-psud.fr>
References: <1189671634.712690.154580@o80g2000hse.googlegroups.com>
	<fcat76$vnc$1@news2.u-psud.fr>
Message-ID: <1189673325.083163.210630@d55g2000hsg.googlegroups.com>

On 9 13 ,   4 43 , Laurent Pointal <laurent.poin... at limsi.fr> wrote:
> Pacino a ?crit :
>
> > Hi, everyone,
>
> > I am wondering whether it's possible to read part (e.g. 1000*1000) of
> > a huge jpeg file (e.g. 30000*30000) and save it to another jpeg file
> > by pure python. I failed to read the whole file and split it, because
> > it would cost 2GB memory.
>
> > Can anyone help me? Any comments would be appreciated.
>
> > Thanks.
>
> > Robert
>
> Just reading parts of the *file* is easy (see tell() seek() and read()
> methods on files).
> But to extract a part of the *picture*, you must uncompress the picture
> in memory, grab the sub-picture, and save it back - generally with
> compression. I can't see how you can bypass the uncompress/compress
> phases and the corresponding memory use.
>
> A+
>
> Laurent.

The most difficult part is the uncompress part. I don't want the whole
picture to be uncompressed in the memory, because it will consume a
lot of memory (2GB, as I mentioned). My goal is to uncompress part of
the picture into the memory.

I just read some article on this subject (http://mail.python.org/
pipermail/image-sig/1999-April/000713.html) , but haven't test it out
yet.

Robert



From bdesth.quelquechose at free.quelquepart.fr  Sat Sep 22 09:07:03 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 22 Sep 2007 15:07:03 +0200
Subject: Nested For and While Statements
In-Reply-To: <1190666585.281623.228920@22g2000hsm.googlegroups.com>
References: <1190662087.403000.16290@g4g2000hsf.googlegroups.com>
	<1190664112.564911.13480@57g2000hsv.googlegroups.com>
	<1190666585.281623.228920@22g2000hsm.googlegroups.com>
Message-ID: <46f82621$0$9017$426a34cc@news.free.fr>

koutoo at hotmail.com a ?crit :
(snip)
> My actual code has different variables, but thanks for pointing that
> out.  I'm so used to coding in VB, where indenting isn't a problem, so
> all this indenting is new to me how Python wants it dictated. 

statement:
   block line 1
   block line 2
# end statement block


  I made
> the changes and still get an error at the same point after the second
> For statement? So:
> 
> While :
>      Code under while
>      More under while.
> 
>      For (x)
>           Part of x
>           Last of x
> 
>           For(y)
>                Part of y
>                Still part of y
>                last part of y.
             # end for(y)

>           New line part of x #where does this belong? 

        # end for(x)

>      Last line under while not in For  #Should go under While, right?

   # end while


From idzwan.nizam at gmail.com  Thu Sep  6 14:34:38 2007
From: idzwan.nizam at gmail.com (idzwan.nizam at gmail.com)
Date: Thu, 06 Sep 2007 11:34:38 -0700
Subject: library to launch program in linux
Message-ID: <1189103678.484278.321650@r34g2000hsd.googlegroups.com>

Hi there,

I'm a new user. What library should I use so that I can launch program
in linux using python? Thank you in advance.



From ricaraoz at gmail.com  Sun Sep  2 07:36:35 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Sun, 02 Sep 2007 08:36:35 -0300
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1i3s2rz.1pkz4z1i1e3a1N%aleax@mac.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>	<1188364909.397692.209170@q4g2000prc.googlegroups.com>	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>	<1188369928.755777.142690@i38g2000prf.googlegroups.com>	<46d75191$0$401$426a74cc@news.free.fr>	<1188518054.298017.90610@x35g2000prf.googlegroups.com>	<46d76595$0$4013$426a74cc@news.free.fr>	<7xlkbsmqe4.fsf@ruckus.brouhaha.com>	<1188525647.003223.199620@q5g2000prf.googlegroups.com>	<mailman.181.1188527203.28954.python-list@python.org>	<1188537516.622167.115080@z24g2000prh.googlegroups.com>	<mailman.192.1188556734.28954.python-list@python.org>	<1i3rxit.1750ghi14bbcm3N%aleax@mac.com>	<mailman.287.1188702321.28954.python-list@python.org>
	<1i3s2rz.1pkz4z1i1e3a1N%aleax@mac.com>
Message-ID: <46DAA043.5010300@bigfoot.com>

Alex Martelli wrote:
> Ricardo Ar?oz <ricaraoz at gmail.com> wrote:
>    ...
>>>> We should remember that the level
>>>> of security of a 'System' is the same as the level of security of it's
>>>> weakest component,
>    ...
>> You win the argument, and thanks you prove my point. You typically
>> concerned yourself with the technical part of the matter, yet you
>> completely ignored the point I was trying to make.
> 
> That's because I don't particularly care about "the point you were
> trying to make" (either for or against -- as I said, it's a case of ROI
> for different investments [in either security, or, more germanely to
> this thread, reliability] rather than of useful/useless classification
> of the investments), while I care deeply about proper system thinking
> (which you keep failing badly on, even in this post).

And here you start, followed by 'F- at system thinking', 'glib and false
assertions', 'falsities', etc.
I don't think you meant anything personal, how could you, we don't know
each other. But the outcome feels like a personal attack instead of an
attack on the ideas exposed.
If that's not what you intended, you should check your communication
abilities and see what is wrong. If that is what you meant well...

So I will not answer your post. I'll let it rest for a while till I
don't feel the sting, then I'll re-read it and try to learn as much as I
can from your thoughts (thank you for them). And even though some of
your thinking process I find objectionable I will not comment on it as
I'm sure it will start some new flame exchange which will have a lot to
do with ego and nothing to do with python.



From bloominator at hotmail.com  Thu Sep 13 22:50:39 2007
From: bloominator at hotmail.com (Gary Bloom)
Date: Thu, 13 Sep 2007 22:50:39 -0400
Subject: PIL DPI trouble
Message-ID: <BAY113-DAV1B4F4E6832AFBD8872083A3BC0@phx.gbl>

Howdy!

I notice that the PIL has trouble playing with the DPI of other programs and image standards: when I create a file with Paint Shop Pro or Photoshop, the PIL routines can't properly recognize the DPI.  And when I create an image file (via the save method) of PIL, setting the DPI, those same two programs can't read the DPI as set by them.  Is there a workaround for this?

Other than this one issue, I have found the PIL to be a BLAST!  :)

Thanks!

Gary Bloom
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From python at hope.cz  Fri Sep 28 02:02:25 2007
From: python at hope.cz (Johny)
Date: Thu, 27 Sep 2007 23:02:25 -0700
Subject: Python  and SSL
Message-ID: <1190959345.041723.108130@k79g2000hse.googlegroups.com>

I need to use Python with SSL comunication betweeen servers.
(I use hhtplib but I think urllib2 can also be used )
 I think I need to use SSL root certificate and tell  a program to
trust this certificate.
But how can I tell my Python program to trust my SSL certificate?
When I tried  before I received the error 503
Thank you for help
L,



From blackmh at gmail.com  Sun Sep  2 15:22:49 2007
From: blackmh at gmail.com (Kveldulv)
Date: Sun, 02 Sep 2007 12:22:49 -0700
Subject: Glade + Python = No GUI
In-Reply-To: <46db09e1$0$7697$9b4e6d93@newsspool2.arcor-online.net>
References: <1188750465.530463.271750@22g2000hsm.googlegroups.com>
	<46db09e1$0$7697$9b4e6d93@newsspool2.arcor-online.net>
Message-ID: <1188760969.316987.214410@w3g2000hsg.googlegroups.com>

On Sep 2, 9:07 pm, Wildemar Wildenburger
<lasses_w... at klapptsowieso.net> wrote:
> Kveldulv wrote:
> > When interrupted, I get
>
> > File "gui.py", line 11, in <module>
> >     gtk.main()
>
> Ah, I see now. Thats just telling you that *you* interrupted the
> function/method/whateverthatis.
>
> > When GUI coded manually, all works.
>
> Hence: Something in your (generated) code or XML file is corrupt or
> missing. Perhaps some sort of show() call or attribute. I really only
> have marginal experience with pygtk so I'm just stabbing at thin air.
>
> sorry :(
> /W

I sorted it out and you're right. I didn't found out why this thing
didn't work since
it's c/pasted straight from the book I'm learning from but this did
the trick:

class TwoButtonsGUI:
    def __init__(self):
	xml = gtk.glade.XML("buttons.glade")


	self.window = xml.get_widget("window1")
	self.window.show()

etc

Thanks for help!



From tim at tdw.net  Fri Sep 28 08:29:40 2007
From: tim at tdw.net (Tim Williams)
Date: Fri, 28 Sep 2007 13:29:40 +0100
Subject: recipient validation with smtplib
In-Reply-To: <46FCEA9E.3030700@chamonix.reportlab.co.uk>
References: <46FCE387.9070601@chamonix.reportlab.co.uk>
	<9afea2ac0709280433n361ce4fx2a26a05de2b1b1ae@mail.gmail.com>
	<46FCEA9E.3030700@chamonix.reportlab.co.uk>
Message-ID: <9afea2ac0709280529o349a004mb5f2295a8f1f5907@mail.gmail.com>

On 28/09/2007, Robin Becker <robin at reportlab.com> wrote:
> Tim Williams wrote:
> > On 28/09/2007, Robin Becker <robin at reportlab.com> wrote:
> >> Is there a way to use smtplib to get recipient validation. I can use smtplib
> >> quite happily to send emails using the locahost's sendmail, but sendmail is just
> >>  fire and forget, so some bad addresses eg idiot at www.dingo.zzz don't cause any
> >> error in the sending application. I know some smtp setups do enforce recipient
> >> validation, but it doesn't seem terribly easy to do this with sendmail. I
> >> wondered if there were some way to do this in python?
> >
> > There is no way of  validating *every* email address you send to using
> > SMTP alone.   Some servers accept every address and bounce later - as
> > you have found out. So for the purpose of the SMTP client, or relaying
> > server,  the address is valid at sending time to those servers.
> >
> > Checking DNS for MX records is a possibility for removing some bad
> > addresses, but it's not fool proof as the RFCs don't require MX
> > records to exist for a domain to be able to receive email.  If no MX
> > records are present, one (and only one!) IP address returned from the
> > domain's A record(s) should be tried.
> >
> > HTH :)
> Thanks, it's at least ammunition for me to say it cannot easily be done. I found
> this milter
>
> http://www.jmaimon.com/sendmail/callahead-milter/
>
> but I think this will cause every send to be checked which is probably not what
> we need.


Hmm,  call-ahead functions just initiate the first part of the SMTP
dialogue - to the RCPT TO,   unless you cache the results so that the
call-ahead only checks each address once a day or so there is no
benefit.  Without caching it will just slow down sending process as
you will get 1.5 SMTP conversations per outgoing message instead of
just 1.    However,  they still won't catch invalid email addresses
when the server accepts all addresses* and bounces later.

* all addresses = all addresses on domains local to that server.

I have written functions like this in the past for outbound/inbound
(recipient/sender) address checking,  using combinations of SMTP
dialogue, DNS and port checking, bounce-collection, SPF and other
techniques over the years.   There is no guaranteed way of checking
that all email addresses in your list are either VALID or INVALID.
Valid email addresses can get refused/bounce for a variety of reasons,
and invalid addresses sometimes get accepted/don't bounce at all.

You should work on either a best-effort basis,  running some checks
but accepting that its not foolproof  -OR- use no checks at all
knowing that most invalid email addresses will be handled correctly by
the SMTP processes

HTH :)


From kib2 at free.fr  Sat Sep  8 18:03:47 2007
From: kib2 at free.fr (tool69)
Date: Sun, 09 Sep 2007 00:03:47 +0200
Subject: Parsing nested constructs
In-Reply-To: <mailman.282.1189286722.2658.python-list@python.org>
References: <46e308d3$0$9153$426a74cc@news.free.fr>
	<mailman.282.1189286722.2658.python-list@python.org>
Message-ID: <46e31bf8$0$26727$426a34cc@news.free.fr>

David a ?crit :
> On 9/8/07, tool69 <kib2 at free.fr> wrote:
>> Hi,
>>
>> I need to parse some source with nested parenthesis, like this :
>>
> 
> If this is exactly how your data looks, then how about a loop which
> searches for "{item" and the following "}"? You can use the "find"
> string method for that.
> 
> Otherwise, if the items don't look exactly like "{item", but the
> formatting is otherwise exactly the same as above, then look for lines
> that have both "{" and "}" on them, then get the string between them.
> 
> Otherwise, if { and } and the item aren't always on the same line,
> then go through the string character by character, keep track of when
> you encounter "{" and "}". When you encounter a "}" and there was a
> "{" before (ie, not a "}"), then get the string between the "{" and
> the "}"
Hi David,

thanks for answering, I will choose the last one as my strings are not 
on the same line and may contain a lot of stuff inside.

cheers,

6TooL9


From redtiger84 at googlemail.com  Wed Sep 12 10:18:21 2007
From: redtiger84 at googlemail.com (Christoph Krammer)
Date: Wed, 12 Sep 2007 14:18:21 -0000
Subject: MemoryError on reading mbox file
In-Reply-To: <mailman.431.1189592452.2658.python-list@python.org>
References: <1189589259.662667.149730@w3g2000hsg.googlegroups.com>
	<mailman.431.1189592452.2658.python-list@python.org>
Message-ID: <1189606701.345077.213410@d55g2000hsg.googlegroups.com>

On 12 Sep., 12:20, David <wizza... at gmail.com> wrote:
> It may be that Python's garbage collection isn't keeping up with your app.
>
> You could try periodically forcing it to run. eg:
>
> import gc
> gc.collect()

I tried this, but the problem is not solved. When invoking the garbage
collection after every loop run, the amount of memory indicated by top
stays the same for a very long time until at some point (at different
messages), while it is executing the loop header, the memory increases
until it hits 100% and swap hit also 100% => MemoryError

Can there be a problem within the mailbox module while processing too
large files?

Regards,
 Christoph




From davigoli at gmail.com  Mon Sep 24 20:53:46 2007
From: davigoli at gmail.com (David)
Date: Tue, 25 Sep 2007 00:53:46 -0000
Subject: PIL GIF transparency
Message-ID: <1190681626.499676.14620@n39g2000hsh.googlegroups.com>

Hello alll,

Apologies if this isn't the correct list.

I'm getting my feet wet with the Python Imaging Library (PIL) 1.1.6 on
Python 2.5.1.  I have played around quite a bit with transparent GIFs,
and from what I can tell, PIL should support what I want to do -
except I can't seem to get it to work.

I have a large number of smallish icons (GIFs with transparency) that
I'd like to tile into a grid in one large GIF image.  The background
color of the image should be GIF-transparent.  Currently, I can set it
to be white or black or any other color I want, just not transparent.
My current code:

import os, sys
from PIL import Image, ImageColor

# size in pixels of each row/col
ROWSIZE = 50
COLSIZE = 50

# maxwidth of sprite grid
SPRITEWIDTH = 20
MAXWIDTH = COLSIZE*SPRITEWIDTH

FILENAME = '/static/images/icons.gif'

def merge():
    pwd = os.getcwd()
    imagePath = os.path.join(pwd, 'images')

    # Somehow, I need to ensure the palette used in the sprite image
    # is the same as the individual icons
    sprites = Image.new('RGBA', (MAXWIDTH, MAXWIDTH), (253,253,253,0))
    sprites.putalpha(0)

    palette = None
    colors = []
    col = 10
    row = 10

    for f in os.listdir(imagePath):
        try:
            im = Image.open(os.path.join(imagePath, f))

            if im.size[0] <= 20 and im.size[1] <= 20 and im.format ==
'GIF':
                sprites.paste(im.copy(), (col, row))
                print 'url(/static/images/%s) => url(%s) -%dpx -%dpx'
% (f, FILENAME, col, row)
                col += COLSIZE
                if col >= MAXWIDTH:
                    row += ROWSIZE
                    col = 10

                if row >= sprites.size[1]:
                    break

        except IOError, ex:
            pass

    sprites = sprites.crop((0,0,MAXWIDTH, row)).point(lambda pt: pt ==
(253, 253, 253, 0) and 0 or pt)
    return sprites

So this code is obviously littered with the detritus of failed
attempts to get transparency to work.  Has anyone out there had any
experience with this?

Thanks,

David



From ivonet at gmail.com  Fri Sep 21 16:20:00 2007
From: ivonet at gmail.com (Ivo)
Date: Fri, 21 Sep 2007 22:20:00 +0200
Subject: Resolving windows shortcut to url
In-Reply-To: <46f422d8$0$3030$e4fe514c@dreader31.news.xs4all.nl>
References: <lh68f3dskbiosrr98qideunruumqme1kel@4ax.com>
	<46f422d8$0$3030$e4fe514c@dreader31.news.xs4all.nl>
Message-ID: <46f4268d$0$3030$e4fe514c@dreader31.news.xs4all.nl>

Ivo wrote:
> Richard Townsend wrote:
>> If I have a windows shortcut to a URL, is there a way to get the URL
>> in a Python app?
>>
>> I found some code that uses pythoncom to resolve shortcuts to local
>> files, but I haven't found any examples for URLs.
>>
>> The PyWin32 help mentions the PyIUniformResourceLocator Object, but I
>> couldn't find an example of how to use it.
>>
> do you mean a *.lnk file or a *.url file?

if an *.url file just open it as a properties file (ConfigParser) 
because it looks something like:


[InternetShortcut]
URL=http://ivonet.nl/
IDList=
IconFile=http://ivonet.nl/favicon.ico
IconIndex=1
[{000214A0-0000-0000-C000-000000000046}]
Prop3=19,2



From perl4hire at softouch.on.ca  Thu Sep 13 11:39:22 2007
From: perl4hire at softouch.on.ca (Amer Neely)
Date: Thu, 13 Sep 2007 11:39:22 -0400
Subject: Coming from Perl
In-Reply-To: <mailman.489.1189695918.2658.python-list@python.org>
References: <Cv%Fi.198$372.59@read2.cgocable.net>	<1189644803.816375.269950@y42g2000hsy.googlegroups.com>	<b46Gi.221$372.100@read2.cgocable.net>	<87y7fa52ru.fsf@benfinney.id.au>	<jWaGi.224$372.55@read2.cgocable.net>	<mailman.485.1189691416.2658.python-list@python.org>	<d9cGi.356$372.131@read2.cgocable.net>
	<mailman.489.1189695918.2658.python-list@python.org>
Message-ID: <iPcGi.357$372.115@read2.cgocable.net>

Richie Hindle wrote:
>> [Amer]
>> #!/usr/bin/python
>> [...] On my home PC [...]
>> [Thu Sep 13 04:16:03 2007] [error] [client 0.0.0.0] (OS 2)The system 
>> cannot find the file specified.
> 
> That's because on your home PC Python is somewhere like
> C:\Python25\python.exe, not /usr/bin/python.
> 
> Are you sure /usr/bin/python is correct for your hosting environment?
> 

It's my understanding that the Windows shell doesn't pay much attention 
to the shebang line if the file type is associated with the proper 
application.

But I tried your suggestion and got the same results.

-- 
Amer Neely
w: www.webmechanic.softouch.on.ca/
Perl | MySQL programming for all data entry forms.
"Others make web sites. We make web sites work!"


From domma at procoders.net  Mon Sep  3 09:06:57 2007
From: domma at procoders.net (Achim Domma)
Date: Mon, 03 Sep 2007 06:06:57 -0700
Subject: 400 Bad Request calling urllib2.urlopen()
Message-ID: <1188824817.761125.190520@k79g2000hse.googlegroups.com>

Hi,

I have an url which redirects the client to another url. If I paste
the url into a browser, it works fine. If I open it via
urllib2.urlopen() I get the following error:

Traceback (most recent call last):
  File "...\crawlRawDocuments.py", line 16, in <module>
    body = urlopen(url).read()
  File "C:\Python25\lib\urllib2.py", line 121, in urlopen
    return _opener.open(url, data)
  File "C:\Python25\lib\urllib2.py", line 380, in open
    response = meth(req, response)
  File "C:\Python25\lib\urllib2.py", line 491, in http_response
    'http', request, response, code, msg, hdrs)
  File "C:\Python25\lib\urllib2.py", line 412, in error
    result = self._call_chain(*args)
  File "C:\Python25\lib\urllib2.py", line 353, in _call_chain
    result = func(*args)
  File "C:\Python25\lib\urllib2.py", line 575, in http_error_302
    return self.parent.open(new)
  File "C:\Python25\lib\urllib2.py", line 380, in open
    response = meth(req, response)
  File "C:\Python25\lib\urllib2.py", line 491, in http_response
    'http', request, response, code, msg, hdrs)
  File "C:\Python25\lib\urllib2.py", line 418, in error
    return self._call_chain(*args)
  File "C:\Python25\lib\urllib2.py", line 353, in _call_chain
    result = func(*args)
  File "C:\Python25\lib\urllib2.py", line 499, in http_error_default
    raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
urllib2.HTTPError: HTTP Error 400: Bad Request

I'm using Python 2.5.1 and Google did not help. Any hint on how to fix
or debug this problem?

regards,
Achim



From tjreedy at udel.edu  Thu Sep 20 14:29:10 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 20 Sep 2007 14:29:10 -0400
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com><fcq352$u0a$1@sea.gmane.org><mailman.786.1190246955.2658.python-list@python.org><1190263363.496695.83300@57g2000hsv.googlegroups.com><mailman.802.1190292987.2658.python-list@python.org>
	<7xwsulv0y4.fsf@ruckus.brouhaha.com>
Message-ID: <fcue5f$6vm$1@sea.gmane.org>


"Paul Rubin" <"http://phr.cx"@NOSPAM.invalid> wrote in message 
news:7xwsulv0y4.fsf at ruckus.brouhaha.com...
| It does sound like removing the GIL from CPython would have very high
| costs in more than one area.  Is my hope that Python will transition
| from CPython to PyPy overoptimistic?

I presume you mean 'will the leading edge reference version transition...
Or more plainly, "will Guido switch to PyPy for further development of 
Python?"  I once thought so, but 1) Google sped the arrival of Py3.0 by 
hiring Guido with a major chunk of time devoted to Python development, so 
he started before PyPy was even remotely ready (and it still is not); and 
2) PyPy did not focus only or specifically on being a CPython replacement 
but became an umbrella for a variety of experiment (including, for 
instance, a Scheme frontend). 





From luismgz at gmail.com  Mon Sep 24 21:36:38 2007
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M=2E_Gonz=E1lez?=)
Date: Tue, 25 Sep 2007 01:36:38 -0000
Subject: TRying to import files from my folder not pythons lib folder
In-Reply-To: <mailman.969.1190620981.2658.python-list@python.org>
References: <1190395964.541835.114350@50g2000hsm.googlegroups.com>
	<1190396569.732154.234270@r29g2000hsg.googlegroups.com>
	<mailman.883.1190399436.2658.python-list@python.org>
	<1190595699.093793.100960@w3g2000hsg.googlegroups.com>
	<mailman.969.1190620981.2658.python-list@python.org>
Message-ID: <1190684198.266529.85020@y42g2000hsy.googlegroups.com>

On Sep 24, 5:00 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Sun, 23 Sep 2007 22:01:39 -0300, Luis M. Gonz?lez <luis... at gmail.com>
> escribi?:
>
> > This is exactly what I did, but I have a new problem now:
> > After setingPYTHONPATHI'm no longer able to start IDLE from the
> > start menu.
> > It seems the system cannot find the file.
> > But if I eliminatePYTHONPATH, everything works as it used to.
>
> > I setPYTHONPATHbecause I wanted to import any existing file in my
> > desktop without having to use sys.path.append...
> > It works when using the command line but strangely, something get
> > messed up with IDLE.
> > Any hint?
>
> Perhaps a python module in your desktop has a name conflicting with a
> standard module?
>
> - On the Start menu, navigate to the IDLE item, but dont click it.
> - RIGHT click on it, and select Properties. Copy the Destination field.
> Should be something like "C:\Python25\Lib\idlelib\idle.bat"
> - Open a cmd window (console), paste the above text and press Enter.
> - Almost certainly you'll get an error; post here the full error and
> traceback.
>
> --
> Gabriel Genellina

I solved the problem!
You were right. It seems there was a module that was causing problems,
although I don't know which one...
I just moved all the .py files on my desktop to a new folder, and
everything worked just fine.
The list of .py files in my desktop were:

'code.py', 'code2.py', 'code22.py', 'code3.py', 'draft.py',
'flups.py', 'forma.py', 'fx.py', 'nuevo.py', 'nwind', 'ops',
'pages.py', 'qqq.py', 'sample.py', 'ses.py', 'sess.py', 'sess2.py',
'soup.py', 'style.py', 'test_session.py', 'up.py', 'up2.py', 'ww.py',
'xx.pyw', 'xx.rsrc.py', 'xxxx.py'

Any idea of which one was causing trouble?

Gracias, che!
Luis



From ebgssth at gmail.com  Mon Sep 17 03:25:22 2007
From: ebgssth at gmail.com (js)
Date: Mon, 17 Sep 2007 16:25:22 +0900
Subject: A short question about non-ascii characters in list
In-Reply-To: <1190006587.185218.168340@22g2000hsm.googlegroups.com>
References: <mailman.636.1190005732.2658.python-list@python.org>
	<1190006587.185218.168340@22g2000hsm.googlegroups.com>
Message-ID: <a23effaf0709170025n791b325dq3df896ea55880344@mail.gmail.com>

Thank you for your quick reply.

> It's intentional.  __str__ of a list uses the __repr__ of its
> elements.  This helps reduce confusion (e.g., between ['a', 'b, c']
> and ['a, b', 'c']).
That's make sence, but it's also true that
sometimes we want to see the contents of a list in pretty format.
So for now I need to write and use crappy mylist like this.

class mylist(list):
    def __str__(self):
        return '[' + ', '.join(self) + ']'

l = mylist([u"???", u"???", u"???"])
print unicode(l)


very ugly, but just works.


From kishore at mindriver-it.com  Tue Sep 25 05:24:59 2007
From: kishore at mindriver-it.com (kishore at mindriver-it.com)
Date: Tue, 25 Sep 2007 14:54:59 +0530
Subject: URGENT REQUIREMENT FOR PYTHON DEVELOPERS
Message-ID: <20070926221048.CD77B1E4009@bag.python.org>

HI 

 

THIS IS KRISHNA KISHORE FROM MindRiver. We have an Urgent requirement for
Python Developers who have 5-7 YRS of EXP.

 

 SKILLS  :PYTHON AND C/C++

 

   WORK LOCATION    :  BANGALROE

 

     PLEASE REVERT US WITH YOUR UPDATED PROFILES.

 

Thanks & Regards,

Kishore Seethanraju |Senior Associate-People Consulting| MindRiver
Information Technologies Pvt. Ltd.
Suite# 512, 4th Floor and Suite # 104, Ground Floor ,Oxford Towers, 139,
Airport Road, Bangalore 560 008| Tel: +91.80.3052.1600 |Direct:
+91.80.3057.5799| Mobile: + 91.9901 96 1696 | Fax: +91.80.3057.5797| Email:
kishore at mindriver-it.com <mailto:skishore at mindriver-it.com>  | Web
www.mindriver-it.com <http://www.mindriver-it.com/>  

Information transmitted by this-mail is proprietary to MindRiver and / or
its Customers and is intended for use only by the individual or entity to
which it is addressed, and may contain information that is privileged,
confidential or exempt from disclosure under applicable law. If you are not
the intended recipient or it appears that this mail has been forwarded to
you without proper authority, you are notified that any use or dissemination
of this information in any manner is strictly prohibited. In such cases,
please notify us immediately at the above mentioned telephone number or
email to services at mindriver-it.com and delete this mail from your records.
We believe this email to be virus free but do not warrant that this is the
case and we will not accept liability for any losses arising from any virus
being transmitted unintentionally by us'

 

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From sergio.correia at gmail.com  Tue Sep  4 00:15:50 2007
From: sergio.correia at gmail.com (Sergio Correia)
Date: Mon, 3 Sep 2007 23:15:50 -0500
Subject: Can you use -getattr- to get a function in the current module?
In-Reply-To: <op.tx32paapx6zn5v@gabriel2.softlabbsas.com.ar>
References: <f1aa6d810709031613r74fc74f0ub9efcc3e4f3b26c1@mail.gmail.com>
	<op.tx32paapx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <f1aa6d810709032115g57bd5238p3aef1931089b4eb1@mail.gmail.com>

Alex, Gabriel,

Thanks for the reply. Works great!

On 9/3/07, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
> En Mon, 03 Sep 2007 20:13:43 -0300, Sergio Correia
> <sergio.correia at gmail.com> escribi?:
>
> > # Module spam.py
> >
> > import eggs
> >
> > print getattr(eggs, 'omelet')(100)
> >
> > That is, I just call the function omelet inside the module eggs and
> > evaulate it with the argument 100.
> >
> > But what if the function 'omelet' is in the module where I do the
> > getattr (that is, in spam.py).  If I do any of this
>
> Use globals():
>
> print globals()['omelet'](100)
>
> (Of course this only makes sense when using a variable instead of
> 'omelet'...)
>
> --
> Gabriel Genellina
>
> --
> http://mail.python.org/mailman/listinfo/python-list

From e.expelliarmus at yahoo.com  Sun Sep 16 14:41:48 2007
From: e.expelliarmus at yahoo.com (e.expelliarmus at yahoo.com)
Date: Sun, 16 Sep 2007 11:41:48 -0700
Subject: best site for hacking tricks , computer tweaks
Message-ID: <1189968108.948320.282940@o80g2000hse.googlegroups.com>

check this out buddies...  a kool site for anti hacking and hacking
tips and tricks , computer tweaks to enhance ur pc,small virus
creation ,etc.... it's the best site ...             www.realm-of-tricks.blogspot.com



From fakeaddress at nowhere.org  Wed Sep  5 05:58:47 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Wed, 05 Sep 2007 09:58:47 GMT
Subject: Python is overtaking Perl
In-Reply-To: <1188865943.238573.218750@w3g2000hsg.googlegroups.com>
References: <1188865943.238573.218750@w3g2000hsg.googlegroups.com>
Message-ID: <r5vDi.48928$Um6.34719@newssvr12.news.prodigy.net>


The expression "faint praise" comes to mind.


-- 
--Bryan


From python at jayloden.com  Sun Sep 30 23:42:51 2007
From: python at jayloden.com (Jay Loden)
Date: Sun, 30 Sep 2007 23:42:51 -0400
Subject: Command-line does work when scheduled
In-Reply-To: <op.tzhtb4atx6zn5v@a98gizw.cpe.telecentro.net.ar>
References: <1191098074.342460.52130@n39g2000hsh.googlegroups.com>	<mailman.1289.1191100817.2658.python-list@python.org>	<1191104269.578536.56470@g4g2000hsf.googlegroups.com>	<mailman.1291.1191113688.2658.python-list@python.org>	<1191114246.668635.327080@o80g2000hse.googlegroups.com>	<mailman.1293.1191120273.2658.python-list@python.org>	<1191163376.067339.34740@d55g2000hsg.googlegroups.com>
	<op.tzhtb4atx6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <47006CBB.9060300@jayloden.com>

I sometimes see issues like this at work because certain processes, including scheduled tasks if I remember right, can run as Local System user instead of as your user account. That tends to be a real pain for Python or Perl scripts because that means that they don't have the associations configured properly. You can play around a bit as Local System to find out, using an old trick: 

open a command prompt and type the following:

  at nn:nn /interactive cmd

where nn:nn is one minute from the current time (24 hour clock, so 11:30 pm would be 24:30). This will launch a cmd prompt on your desktop, but running as Local System instead of as yourself. From there you can see what your script does when you run it as the System user, and see what assoc .py says etc. 

If you still can't figure it out, the only other things I can think of would be to wrap it in a .bat file and try using that for your scheduled task, or using py2exe to compile your script to an exe which should eliminate the whole file association/PATH issue altogether ;)

Hope that helps,

-Jay

Gabriel Genellina wrote:
> No more ideas... I think the scheduler just executes the command line, and  
> if it works in a console, should work in the scheduler too... Unless you  
> execute the job under another user, who has a different association for  
> .py files, that's the only reason I can think of.


From http  Fri Sep 21 16:53:57 2007
From: http (Paul Rubin)
Date: 21 Sep 2007 13:53:57 -0700
Subject: Google and Python
References: <1190228512.627109.308910@n39g2000hsh.googlegroups.com>
	<ufadnRC5BPZm6GzbnZ2dnUVZ_jOdnZ2d@comcast.com>
	<1190231094.276099.136250@22g2000hsm.googlegroups.com>
	<mailman.781.1190232163.2658.python-list@python.org>
	<1190235678.019823.315850@o80g2000hse.googlegroups.com>
	<mailman.887.1190402873.2658.python-list@python.org>
Message-ID: <7xejgr68pm.fsf@ruckus.brouhaha.com>

David <wizzardx at gmail.com> writes:
> Another method is for the apps to run continuously and serve on non-80
> port (or on 80 from another host), and your main web server on port 80
> reverse proxies to it when appropriate.

You can also pass the open sockets around between processes instead of
reverse proxying, using the SCM_RIGHTS message on Unix domain sockets
under Linux, or some similar mechanism under other Unixes (no idea
about Windows).  Python does not currently support this but one of
these days I want to get around to writing a patch.


From mark at qtrac.eu  Tue Sep 25 06:34:23 2007
From: mark at qtrac.eu (Mark Summerfield)
Date: Tue, 25 Sep 2007 11:34:23 +0100
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <59e9fd3a0709250313v76a7626dn69908b39e4ba100b@mail.gmail.com>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<59e9fd3a0709250313v76a7626dn69908b39e4ba100b@mail.gmail.com>
Message-ID: <200709251134.23398.mark@qtrac.eu>

On 2007-09-25, Andrew Durdin wrote:
> On 9/25/07, Mark Summerfield <m.n.summerfield at googlemail.com> wrote:
> >     Since the sorteddict's data is always kept in key order, indexes
> >     (integer offsets) into the sorteddict make sense.  Five additional
> >     methods are proposed to take advantage of this:
> >
> >     key(index : int) -> value
> >
> >     item(index : int) -> (key, value)
> >
> >     value(index : int) -> key
> >
> >     set_value(index : int, value)
> >
> >     delete(index : int)
>
> But what about using non-sequential integer keys (something I do quite
> often)?
>
> e.g. sorteddict({1:'a', 3:'b': 5:'c', 99:'d'})[3]  should return 'b', not
> 'd'.
>
> Andrew

The sorteddict really does work in key order, so:

    d = sorteddict({1:'a', 3:'b', 5:'c', 99:'d'})
    d.items()
    [(1, 'a'), (3, 'b'), (5, 'c'), (99, 'd')]

If you do d[3] you will get 'd' since that is the 4th sequential item.
If you want to get the item with _key_ 3 then use value():

    d.value(3)
    'd'


PS In my previous reply I got my example wrong a second time: should have 
been:
    for item in itemsByDate.values():...



-- 
Mark Summerfield, Qtrac Ltd., www.qtrac.eu



From deets at nospam.web.de  Mon Sep  3 07:23:50 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 03 Sep 2007 13:23:50 +0200
Subject: TypeError: 'module object is not callable'
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<mailman.315.1188810174.28954.python-list@python.org>
	<46dbd11e$0$6228$426a74cc@news.free.fr>
	<mailman.317.1188812089.28954.python-list@python.org>
	<1188816626.021956.281040@22g2000hsm.googlegroups.com>
Message-ID: <5k2966F1prguU1@mid.uni-berlin.de>

 christophertidy at hotmail.com wrote:

> Thank you for your help that seems to have done the trick.
> You are correct Diez B. Roggisch that I come from a java background!
> 
> I have a new tiny problem I can't understand either.
> Withing Step.py I have the following method
> 
> def isCompleted(self):
>     "Check whether data step has been processed"
>     return self.isCompleted
> 
> Then within main.py I simply wish to print the value of isCompleted
> which I try to do by the following
> print 'Magn completed status is',a.isCompleted()
> 
> Which returns the following error:
>     a.isCompleted()
> TypeError: 'int' object is not callable
> 
> I have tried ideas such as int(a.isCompleted) but to no prevail. Any
> ideas?

Without more code, not really. It seems as if a is an integer, and not an
instance of Step.

Diez


From arkanes at gmail.com  Mon Sep 24 12:09:10 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Mon, 24 Sep 2007 11:09:10 -0500
Subject: Can a base class know if a method has been overridden?
In-Reply-To: <1190648887.051630.168520@r29g2000hsg.googlegroups.com>
References: <1190647436.423328.217670@w3g2000hsg.googlegroups.com>
	<46f7d897$0$25150$426a74cc@news.free.fr>
	<1190648887.051630.168520@r29g2000hsg.googlegroups.com>
Message-ID: <4866bea60709240909h3c40bddcv7c4cce70d5c9b382@mail.gmail.com>

On 9/24/07, Ratko <rjagodic at gmail.com> wrote:
> > If your use case is to make sure a given ('abstract') method has been
> > overriden, the canonical solution is to raise NotImplementedError in the
> > base class's implementation
>
> I am not really interested in forcing the subclass to implement a
> method. I am interested in knowing *whether* it did implement it or
> not.
>
>
> > Else, this may be possible using a custom metaclass (or possibly just
> > specializing the __new__ method), but there may be better solutions
> > (depending on what you're really trying to do)..
>
> I have a base class EvtHandler that has methods defined to handle
> certain events. You then subclass from EvtHandler and override the
> methods for the events you want to receive. If a method has been
> overridden, the base class will automatically register for those
> events to make sure that they are even delivered to this handler
> (which is why I would need to know whether a method has been
> overridden or not). Of course, there are other ways of doing this
> which would require a bit more work from the subclass... I just
> thought this would be a neat "automatic" way of registering for
> events.
>
> For example:
>
> class EvtHandler:
>     def __init__(self):
>         if onKey is overridden:
>              register_for_key_events()
>
>     def onKey(self):
>         pass
>
>
> class MyHandler(EvtHandler):
>     def onKey(self):
>         # do something here....

Clumsy, but it seems to work. Using a sentinel value as Marc Rintsch
suggests might be better:

>>> class A(object):
...     def vMethod(self, x):
...         raise NotImplemented
...     def is_implemented(self, method):
...         if getattr(type(self), method.__name__).im_func is not
method.im_func:
...             return True
...     def otherMethod(self, x):
...         raise NotImplemented
...
>>> class B(A):
...     def vMethod(self, x):
...         print x
...
>>> b = b()
Traceback (most recent call last):
  File "<input>", line 1, in <module>
TypeError: 'B' object is not callable
>>> b = B()
>>> b.otherMethod(10)
Traceback (most recent call last):
  File "<input>", line 1, in <module>
  File "<input>", line 8, in otherMethod
TypeError: exceptions must be classes, instances, or strings
(deprecated), not NotImplementedType
>>> b.vMethod(10)
10
>>> b.is_implemented(A.vMethod)
True
>>> b.is_implemented(A.otherMethod)
>>>


(Note that I accidentally raised NotImplemented instead of
NotImplementedError, oops.)


From steve at holdenweb.com  Tue Sep 11 14:46:30 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 11 Sep 2007 14:46:30 -0400
Subject: Car-ac-systems
In-Reply-To: <1189532573.728913.306470@g4g2000hsf.googlegroups.com>
References: <cd6dnW0Vf8-wOnvbRVnyhwA@eclipse.net.uk>	<b0ac48a01b8bb8c9c2b92ff03bf0@msnews.microsoft.com>
	<1189532573.728913.306470@g4g2000hsf.googlegroups.com>
Message-ID: <fc6nq9$2ua$1@sea.gmane.org>

Zentrader wrote:
> <snip>
> What is it about "please do not top-post" that you have difficulty
> understanding? Or do "MVP"s feel that their time is so much more
> valuable than anyone else's that they are free to ignore the norms?
> 
[Actually I wrote the bit above [to a third party], but apparently 
zentrader doesn't feel the need to conform with the norm about quoting 
other people's messages].

> Who made this the norm?  In my travels through web-land, it appears to
> be the opposite.  Don't waste space repeating everything in every
> post, and it wastes everyone's time by have to go over the same thing
> again and again.  Perhaps this thread has a purpose after all, anyway
> it has been reported as spam.
> 
I wasn't talking about "webland". I was talking about the 
comp.lang.python newsgroup/python-list mailing list. And please don;t 
complain that you don't have time to establish the norms for each group 
you post to, since it's long been accepted netiquette that you should 
*read* any group you intend to post to for a while, giving you time to 
discover what the accepted norms *are* ... and on c.l.py the norm is 
definitely "avoid top-posting".

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From zentraders at gmail.com  Thu Sep  6 19:28:46 2007
From: zentraders at gmail.com (Zentrader)
Date: Thu, 06 Sep 2007 16:28:46 -0700
Subject: Beginners Query - Simple counter problem
In-Reply-To: <WZidnbvgAJstpX3bRVnytgA@bt.com>
References: <WZidnbvgAJstpX3bRVnytgA@bt.com>
Message-ID: <1189121326.783000.313180@50g2000hsm.googlegroups.com>

On Sep 6, 10:29 am, David Barr <david.barr... at btinternet.com> wrote:
> yields no results.

Since every response so far has answered everything __Except The
Question You Asked__, your code runs fine on my Linux machine and
prints 15.  The error may be before this bit of code so it isn't
getting called.  Add some print statements and try again

def d6(i):
     print "start of d6()"
     roll = 0
     count = 0
     while count <= i:
         print "d6 count =", count, "of", i
         roll = roll + random.randint(1,6)
         count += 1

     print "returning roll =", roll
     return roll

print d6(3)



From carl.dhalluin at gmail.com  Wed Sep  5 10:45:11 2007
From: carl.dhalluin at gmail.com (carl.dhalluin at gmail.com)
Date: Wed, 05 Sep 2007 14:45:11 -0000
Subject: python exec behaves inconsistent with respect to module imports
In-Reply-To: <fbmde0$io2$03$1@news.t-online.com>
References: <1188997944.162811.33640@r34g2000hsd.googlegroups.com>
	<fbmde0$io2$03$1@news.t-online.com>
Message-ID: <1189003511.666050.293060@22g2000hsm.googlegroups.com>

Hi

Thank you for the explanation

It seems that python behaves different for variables created in the
toplevel namespace, versus deeper namespaces.

CODE:

def g():
  a=2
  print "a in LOC:",locals().has_key('a')
  print "a in GLO:",globals().has_key('a')
  def f():
    print "a in LOC:",locals().has_key('a')
    print "a in GLO:",globals().has_key('a')
    print a
  f()
g()

b=3
print "b in LOC:",locals().has_key('b')
print "b in GLO:",globals().has_key('b')
def h():
  print "b in LOC:",locals().has_key('b')
  print "b in GLO:",globals().has_key('b')
  print b
h()


RESULT:

a in LOC: True
a in GLO: False
a in LOC: True
a in GLO: False
2
b in LOC: True
b in GLO: True
b in LOC: False
b in GLO: True
3


DISCUSSION:

locals() are passed through from a function to a nested function
locals() are not passed if you go from top-level to a nested function.

globals() are visible from all levels
globals() are auto-populated at top level

So now get back to my exec code in the previous post.
The exec applies a mixture of both rules
1. The exec looks at its namespace to apply the rule for globals().
Since I'm not at top-level, variables are not auto-populated in the
globals(), unless I add the keyword 'global' like you suggested.
2. However, the exec applies the other rule for locals(). It does NOT
copy the locals() from one level to the nested one, although it
should.

To me this seems a bug in python exec:
- exec should look at its context to find out if the exec is called
top-level or deeper
- if top-level: auto-populate globals, and do not allow inheritance of
locals to nested levels
- if non top-level: dont populate globals, but allow inheritance of
locals to nested levels.

What do you think?








From steve at holdenweb.com  Mon Sep 24 14:19:27 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 24 Sep 2007 14:19:27 -0400
Subject: xml-rpc timeout
In-Reply-To: <fd30ef$ag$2@lust.ihug.co.nz>
References: <2_WdnTQ86eZNY27bnZ2dnUVZ_jCdnZ2d@comcast.com>	<mailman.877.1190396335.2658.python-list@python.org>	<QYKdnX_tXu5Vj2nbnZ2dnUVZ_qWdnZ2d@comcast.com>	<mailman.885.1190402534.2658.python-list@python.org>
	<fd30ef$ag$2@lust.ihug.co.nz>
Message-ID: <fd8v3e$4ki$1@sea.gmane.org>

Lawrence D'Oliveiro wrote:
> In message <mailman.885.1190402534.2658.python-list at python.org>, Steve
> Holden wrote:
> 
>> Timeouts shouldn't be a normal feature of TCP communications.
> 
> On the contrary, they should. How else are you going to detect that the
> other side has died?

You missed the point, which is that TCP hosts shouldn't normally die. In 
other words, if timeout code is regularly invoked in communicating with 
a specific host, that host is likely at fault.

Naturally timeouts are useful for detecting dropped communications.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From sdeibel at wingware.com  Fri Sep 28 09:56:48 2007
From: sdeibel at wingware.com (Stephan Deibel)
Date: Fri, 28 Sep 2007 09:56:48 -0400
Subject: Python 3.0 migration plans?
In-Reply-To: <mailman.1213.1190971515.2658.python-list@python.org>
References: <mailman.1213.1190971515.2658.python-list@python.org>
Message-ID: <46FD0820.7010705@wingware.com>

Ian Dickinson wrote:
> Never would look like a good time scale to me given that a lot of the stuff I use is being ripped out!!!!

Has any one actually converted any real code or significant bits of code
using the 3.0 converter (in the sandbox somewhere), and if so what kinds
of things actually failed?

Nothing I've read about 3.0 has alarmed me that much yet, but I've not
yet actually tried converting code for it (except a few extension modules,
which at least _compiled_ just fine against 3.0).

- Stephan


From perl4hire at softouch.on.ca  Thu Sep 13 09:30:19 2007
From: perl4hire at softouch.on.ca (Amer Neely)
Date: Thu, 13 Sep 2007 09:30:19 -0400
Subject: Coming from Perl
In-Reply-To: <87y7fa52ru.fsf@benfinney.id.au>
References: <Cv%Fi.198$372.59@read2.cgocable.net>
	<1189644803.816375.269950@y42g2000hsy.googlegroups.com>
	<b46Gi.221$372.100@read2.cgocable.net>
	<87y7fa52ru.fsf@benfinney.id.au>
Message-ID: <jWaGi.224$372.55@read2.cgocable.net>

Ben Finney wrote:
> Amer Neely <perl4hire at softouch.on.ca> writes:
> 
>> Well, I have checked everything I can but I'm getting '500 Internal
>> Server Error'.
> 
> This is the HTTP response code saying that the program that should
> have served the response document instead exited with an error.
> 
> To debug, you should first run the program (or at least the part that
> you're trying to implement) *outside* the context of a web server. Do
> it at a command line, and any errors will show up as exception
> tracebacks.
> 
> Only when you have something that performs correctly outside a web
> server context should you consider how to wrap it in that new
> (harder-to-debug) context.
> 

That is where I'm stuck. It runs fine on my home computer, but I don't 
have shell access to my hosted site.

Can you or anyone see anything in the posted code that might be the 
cause? Why is it so much harder to debug? There is no syntax error that 
I can tell. I've set the file permissions to rwxr-xr-x. I've printed the 
correct content type. It's a simple print statement, as per several 
examples I've seen.

Is it an Apache thing? I've not seen any mention in the documentation on 
that.

-- 
Amer Neely
w: www.webmechanic.softouch.on.ca/
Perl | MySQL programming for all data entry forms.
"Others make web sites. We make web sites work!"


From kyosohma at gmail.com  Thu Sep 13 13:38:21 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 13 Sep 2007 10:38:21 -0700
Subject: Help to start python
In-Reply-To: <1189694381.957459.232350@y42g2000hsy.googlegroups.com>
References: <1189693144.493878.130220@w3g2000hsg.googlegroups.com>
	<1189693433.545822.89580@o80g2000hse.googlegroups.com>
	<1189694381.957459.232350@y42g2000hsy.googlegroups.com>
Message-ID: <1189705101.661806.255580@19g2000hsx.googlegroups.com>

On Sep 13, 9:39 am, python_lover <govisath... at gmail.com> wrote:
> On Sep 13, 7:23 pm, kyoso... at gmail.com wrote:
>
>
>
> > python_lover wrote:
> > > Hi All,
>
> > > I'm new  to python. I installed python 2.5  and IDLE 1.2.1 . I'm able
> > > to run shell commands.
>
> > > But I don't know how to execute a python program using this. When I'm
> > > opeing a py program a seperate IDLE window opeing with program text.
> > > But I don't know to to execute the prg.
>
> > > Please help me on this .
>
> > > thank you
>
> > > regards
> > > Sat
>
> > When in IDLE, you can go to the Run menu and choose Run Module (or
> > press F5) in the window that has the program code.
>
> > Hope that helps!
>
> > Mike- Hide quoted text -
>
> > - Show quoted text -
>
> Thankx mike.
>
> It is working well.
>
> Please guide me some good sites to start web based programing on
> python.
>
> thank you.
>
> sat

Check out
http://wiki.python.org/moin/WebProgramming
http://www.boddie.org.uk/python/HTML.html
http://www.crummy.com/software/BeautifulSoup/

And the many Python web frameworks, like Django, TurboGears, Zope/
Plone, etc.

Mike




From nospam at nowhere.com  Sun Sep  2 06:28:10 2007
From: nospam at nowhere.com (DavidM)
Date: 2 Sep 2007 22:28:10 +1200
Subject: ANN: Python bindings for mjpegtools (yuv4mpeg)
Message-ID: <46da903a$1@news.orcon.net.nz>

Hi,

I've built some bindings for the yuv4mpeg API, supporting both Python
and C++.

http://www.freenet.org.nz/pyyuv4mpeg/

Based on SWIG, implements virtually the whole API as given in
yuv4mpeg.h, and also implements a high-level 'Stream' class in both C++
and Python.

These bindings allow easy creation of video filters, in Python or C++, that
work to the mjpegtools 'yuv4mpegpipe' standard - reading YUV4MPEG frames
into stdin and/or writing YUV4MPEG frames to stdout.

Enjoy

Cheers
David


From Dominic at PLEASEASK.co.uk  Thu Sep  6 06:01:49 2007
From: Dominic at PLEASEASK.co.uk (special_dragonfly)
Date: Thu, 6 Sep 2007 11:01:49 +0100
Subject: SQLite and coercing to Unicode - please help.
Message-ID: <46dfcbea$0$89178$7b0f0fd3@mistral.news.newnet.co.uk>

Hello!
First, the problem: the program below falls over with the following error:
TypeError: coercing to Unicode: need string or buffer, NoneType found.
and gives the following line:
"' WHERE secBoardId='"+Values[0]+"'"
My first thought was that Values[0] was containing nothing at all, that 
would allow a NoneType to be found, but it has data in that position of the 
list - you'll see below.
So I thought that Values[0] was 'losing' its type somewhere, so I checked it 
just by having the program print out type(Values[0]), it says it's a 
string - also seen below.
So given it's not a NoneType and it's a string, I don't understand why I'm 
getting the error. I tried forcing it to a particular type (I think that's 
the right word), so I put lines like:
Values[0]=unicode(Values[0]) or
WHERE ... ='"str(Values[0]+"'"
but neither worked.
I've put my code below, I'm sorry it's so long, I've commented the line 
where it's falling over.
If it's useful, I am using Python 2.5.1, ElementTree 1.2.6 and pySQLite 
2.3.5
If this is a silly mistake ( one where RTFM is a valid response, can you 
point me at the place where I can get the answer please?), otherwise any 
help is greatly appreciated as I'm out of ideas. :(
Dominic


The output:
At top of function: GBP/PLUS-ofn-GB00B12T7004
Values list contains: ['GBP/PLUS-ofn-GB00B12T7004', u'GBP', u'GB00B12T7004 
', u'All Star Minerals plc                   ', 'ASMO', 'DE', 'PLUS', 
u'B12T700', u'        ', u'A', None, None, None, '000000000000000000', '0', 
'0']

Type of Values[0] is: <type 'str'>

The code:
def dealwithSecBRep(text_buffer):
    # text_buffer contains a sequential string of xml
    Elements=['secBoardId','currencyId','issuerId','secName','secShortName','secClassId',\
              'sectorId','isin','issueDate','inheritedState','bidPrice','offerPrice','midPrice',\
              'standardMarketSize','openPrice','closePrice']
    Values=[]
    dom=get_a_document(text_buffer) # this function returns an xml document.
    branch=dom.getiterator(Elements[0])
    Values.append(GetUniqueId(branch[0])) # Combo of secCode and secBoardId
    print "At top of function:",Values[0]
    sql=cursor.execute('SELECT*FROM SecB WHERE 
secBoardId='+"'"+Values[0]+"'").fetchall()
    SQL2=sql
    flag=0
    if len(sql)>0:
        #Prior database exists
        try:
            branch=dom.getiterator(Elements[1])
            Values.append(branch[0].text) # currencyID
        except:
            value=GetFromDB('currencyCode',text_buffer)
            Values.append(value)
        try:
            branch=dom.getiterator(Elements[2])
            Values.append(branch[0].text) # issuerName
        except:
            value=GetFromDB('issuerName',text_buffer)
            Values.append(value)
        try:
            branch=dom.getiterator(Elements[3])
            Values.append(branch[0].text) # Tradable Instrument Name
        except:
            value=GetFromDB('Tradable Instrument Name',text_buffer)
            Values.append(value)
        try:
            branch=dom.getiterator(Elements[4])
            Values.append(branch[0].text) # Tradable Instrument Short Name
        except:
            value=GetFromDB('Tradable Instrument Short Name',text_buffer)
            Values.append(value)
        try:
            branch=dom.getiterator(Elements[5])
            Values.append(branch[0].text) # Tradable Instrument Type
        except:
            value=GetFromDB('Tradable Instrument Type',text_buffer)
            Values.append(value)
        try:
            branch=dom.getiterator(Elements[6])
            Values.append(branch[0].text) # SectorCode
        except:
            Values.append('PLUS') # SectorCode if one does not naturally 
exist
        try:
            branch=dom.getiterator(Elements[7])
            value=str(branch[0].text)
            Values.append(value[4:11]) # SEDOL
        except:
            value=GetFromDB('SEDOL Code',text_buffer)
            Values.append(value)
        try:
            branch=dom.getiterator(Elements[8])
            Values.append(branch[0].text) # Date
        except:
            value=GetFromDB('Tradable Instrument Effective 
Date',text_buffer)
            Values.append(value)
        try:
            branch=dom.getiterator(Elements[9])
            Values.append(branch[0].text) # inherited State
        except:
            value=GetFromDB('inheritedState',text_buffer)
            Values.append(value)
        try:
            branch=dom.getiterator(Elements[10])
            Values.append(branch[0].text) # bidPrice if available
        except:
            Values.append("0"*18) # bidPrice if not available
        try:
            branch=dom.getiterator(Elements[11])
            Values.append(branch[0].text) # offerPrice if available
        except:
            Values.append("0"*18) # offerPrice if not available
        try:
            branch=dom.getiterator(Elements[12])
            Values.append(branch[0].text) # midPrice if available
        except:
            Values.append("0"*18) # midPrice if not available
        try:
            branch=dom.getiterator(Elements[13])
            Values.append(branch[0].text) # standardMarketSize if available
        except:
            Values.append("0"*18) # standardMarketSize if not available
        try:
            branch=dom.getiterator(Elements[14])
            Values.append(branch[0].text) # Stock Open
        except:
            Values.append("0") # Stock Close
        try:
            branch=dom.getiterator(Elements[15])
            Values.append(branch[0].text) # Stock Close
        except:
            Values.append("0") # Stock Open
        flag=0
    else:
        #Fill missing fields with blanks.
        try:
            branch=dom.getiterator(Elements[1])
            Values.append(branch[0].text) # currencyID
        except:
            Values.append(" "*3)
        try:
            branch=dom.getiterator(Elements[2])
            Values.append(branch[0].text) # issuerName
        except:
            Values.append(" "*35)
        try:
            branch=dom.getiterator(Elements[3])
            Values.append(branch[0].text) # Tradable Instrument Name
        except:
            Values.append(" "*40)
        try:
            branch=dom.getiterator(Elements[4])
            Values.append(branch[0].text) # Tradable Instrument Short Name
        except:
            Values.append(" "*15)
        try:
            branch=dom.getiterator(Elements[5])
            Values.append(branch[0].text) # Tradable Instrument Type
        except:
            Values.append("  ") #It's length 2
        try:
            branch=dom.getiterator(Elements[6])
            Values.append(branch[0].text) # SectorCode
        except:
            Values.append('PLUS') # SectorCode if one does not naturally 
exist
        try:
            branch=dom.getiterator(Elements[7])
            value=str(branch[0].text)
            Values.append(value[4:11]) # SEDOL
        except:
            Values.append(" "*7)
        try:
            branch=dom.getiterator(Elements[8])
            Values.append(branch[0].text) # Date
        except:
            Values.append(" "*8)
        try:
            branch=dom.getiterator(Elements[9])
            Values.append(branch[0].text) # inherited State
        except:
            Values.append('A') # Means Active
        try:
            branch=dom.getiterator(Elements[10])
            Values.append(branch[0].text) # bidPrice if available
        except:
            Values.append("0"*18) # bidPrice if not available
        try:
            branch=dom.getiterator(Elements[11])
            Values.append(branch[0].text) # offerPrice if available
        except:
            Values.append("0"*18) # offerPrice if not available
        try:
            branch=dom.getiterator(Elements[12])
            Values.append(branch[0].text) # midPrice if available
        except:
            Values.append("0"*18) # midPrice if not available
        try:
            branch=dom.getiterator(Elements[13])
            value=string.ljust(string.rjust(branch[0][0].text,10,"0"),18,"0")
            Values.append(value) # standardMarketSize if available
        except:
            Values.append("0"*18) # standardMarketSize if not available
        print "Values currenctly:",Values
        try:
            branch=dom.getiterator(Elements[14])
            value=string.ljust(string.rjust(branch[0][0].text,10,"0"),18,"0")
            Values.append(branch[0].text) # Stock Open
        except:
            Values.append("0") # Stock Close
        try:
            branch=dom.getiterator(Elements[15])
            value=string.ljust(string.rjust(branch[0][0].text,10,"0"),18,"0")
            Values.append(branch[0].text) # Stock Close
        except:
            Values.append("0") # Stock Open
        flag=1
    if flag==0:
        print "Values list contains:",Values,"\n"
        print "Type of Values[0] is:",type(Values[0]),"\n"
        longstring="UPDATE SecB SET 
currencyCode='"+Values[1]+"',issuerName='"+Values[2]+"',instrName='"+Values[3]+\
                    "',instrShortName='"+Values[4]+"',instrType='"+Values[5]+"',secCode='"+Values[6]+\
                    "',SEDOL='"+Values[7]+"',Date='"+Values[8]+"',SuspendedState='"+Values[9]+\
                    "',bidPrice='"+Values[10]+"',offerPrice='"+Values[11]+"',midPrice='"+Values[12]+\
                    "',standardMarketSize='"+Values[13]+"',openOrClosed='"+Values[14]+\
                    "' WHERE secBoardId='"+Values[0]+"'" # This is the line 
it falls over on.
        cursor.execute(longstring)
        connection.commit()
        currentStatus=SQL2[0][13] #current Stock Status
        if currentStatus==1: # Open
            if Values[14]!='0': # xml says open
                oldStart("<secBoardRep>",text_buffer) #5SE
            elif Values[15]!='0': # xml says closed
                oldStart("<ClosingRep>",text_buffer)
            elif Values[14]==0 and Values[15]==0: # neither openPrice nor 
closePrice exist in xml
                oldStart("<secBoardRep2>",text_buffer) # just 5ER and 5IS
        else: # currently Closed
            if Values[14]!='0': #xml says open
                oldStart("<OpeningRep>",text_buffer) # 5PR
            else: #xml says closed
                oldStart("<secBoard2Rep>",text_buffer) # 5ER,5IS
    else:
        cursor.execute('INSERT INTO SecB VALUES 
(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)',\
                       (Values[0],Values[1],Values[2],Values[3],Values[4],Values[5],\
                        Values[6],Values[7],Values[8],Values[9],Values[10],Values[11],\
                        Values[12],Values[13],Values[14]))
        connection.commit()
        if Values[14]!='0': # xml says open
            test=dom.getiterator('openPrice')
            oldStart("<secBoard2Rep>",text_buffer) # 5ER, 5IS
            oldStart("<OpeningRep>",text_buffer) # 5PR
        else: # xml says closed, or neither options exist.
            oldStart("<secBoard2Rep>",text_buffer) # 5ER, 5IS




From kib2 at free.fr  Sat Sep  8 16:42:06 2007
From: kib2 at free.fr (tool69)
Date: Sat, 08 Sep 2007 22:42:06 +0200
Subject: Parsing nested constructs
Message-ID: <46e308d3$0$9153$426a74cc@news.free.fr>

Hi,

I need to parse some source with nested parenthesis, like this :

 >cut-------------

{
     {item1}
     {
      {item2}
      {item3}
     }
}

 >cut-------------


In fact I'd like to get all start indexes of items and their end (or 
lenght).

I know regexps are rather limited for this type of problems.
I don't need an external module.

What would you suggest me ?

Thanks.


From json.barnes at gmail.com  Fri Sep 28 19:29:54 2007
From: json.barnes at gmail.com (Jason M Barnes)
Date: Fri, 28 Sep 2007 19:29:54 -0400
Subject: Bug with lists of pairs of lists and append()
In-Reply-To: <slrnffqvr6.uut.zach@zaphome.in.tu-clausthal.de>
References: <slrnffqvr6.uut.zach@zaphome.in.tu-clausthal.de>
Message-ID: <833263a00709281629x6de213c4w13a93e8c37389bd8@mail.gmail.com>

On 9/28/07, Gabriel Zachmann <zach at removeme.in.tu-clausthal.de> wrote:
> Well,
>
> could some kind soul please explain to me why the following trivial code is
> misbehaving?
>
> #!/usr/bin/python
>
> lst = [ 0, 1, 2 ]
>
> s = []
>
> l = [ lst[0] ]
> r = lst[1:]
> while r:
>     x = (l,r)
>     print x
>     s.append( x )
>
>     l.append( r.pop(0) )
>
> print s
>
>
>
> The output I get is:
>
> ([0], [1, 2])
> ([0, 1], [2])
> [([0, 1, 2], []), ([0, 1, 2], [])]
>
> and the error is in the last line: the two pairs in the outer list are
> identical and they should be as the pairs on the first and the 2nd line,
> respectively!
>
> I think I'm going nuts -- for the life of me I don't see what's going on ...
> (I've been tracking down a bug in my larger python script, and the cause
> seems to boil down to the above snippet.)
>
> Thanks a lot in advance for any insights, etc.
>
> Best regards,
> Gabriel.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>

If you're familiar with C or C++, think of s as holding a pointer to x
which in turn holds a pointer to l and r, so when you change l or r, x
(and s indirectly) is still pointing to the same lists which by the
end of your loop have changed to r=[] and l=[0,1,2].

BTW:  It's not really "misbehaving."  It's doing exactly what you're
telling it to do ;-)

Jason


From DouhetSukd at gmail.com  Fri Sep 14 03:18:27 2007
From: DouhetSukd at gmail.com (DouhetSukd at gmail.com)
Date: Fri, 14 Sep 2007 00:18:27 -0700
Subject: funny little 190 lines command line math tutor I wrote for my
	7-year old.
In-Reply-To: <1189753950.569402.186370@g4g2000hsf.googlegroups.com>
References: <1189753950.569402.186370@g4g2000hsf.googlegroups.com>
Message-ID: <1189754307.528472.7590@w3g2000hsg.googlegroups.com>

Ok, it does look a bit mangled.  I re-posted it on www.pastebin.com,
at http://python.pastebin.com/m7b1f9ab5.

Cheers



From antroy at gmail.com  Mon Sep 10 03:50:56 2007
From: antroy at gmail.com (Ant)
Date: Mon, 10 Sep 2007 00:50:56 -0700
Subject: python 2.5 problems
In-Reply-To: <mailman.293.1189360234.2658.python-list@python.org>
References: <3nVEi.98555$Vk6.66626@newsfe07.phx>
	<mailman.293.1189360234.2658.python-list@python.org>
Message-ID: <1189410656.649807.63640@r29g2000hsg.googlegroups.com>

On Sep 9, 6:57 pm, "O.R.Senthil Kumaran" <orsent... at gmail.com> wrote:
> > Finally deleted 2.2 and loaded 2.5 (see below), using
>
> Dont delete. Uninstall python 2.2 and additional modules if you have installed them.

But since you've already deleted 2.2, download and reinstall 2.2,
uninstall 2.2 and 2.5 via Add/Remove Programs and then reinstall 2.5
again.

--
Ant...



From hall.jeff at gmail.com  Sat Sep 29 14:32:07 2007
From: hall.jeff at gmail.com (hall.jeff at gmail.com)
Date: Sat, 29 Sep 2007 18:32:07 -0000
Subject: Program inefficiency?
In-Reply-To: <1191090293.017485.225470@y42g2000hsy.googlegroups.com>
References: <1191079347.192272.240540@22g2000hsm.googlegroups.com>
	<1191087234.915654.182370@k79g2000hse.googlegroups.com>
	<mailman.1284.1191088565.2658.python-list@python.org>
	<1191090293.017485.225470@y42g2000hsy.googlegroups.com>
Message-ID: <1191090727.614819.292550@50g2000hsm.googlegroups.com>

It think he's saying it should look like this:

# File: masseditor.py

import re
import os
import time

p1= re.compile('(href=|HREF=)+(.*)(#)+(.*)(\w\'\?-<:)+(.*)(">)+')
p2= re.compile('(name=")+(.*)(\w\'\?-<:)+(.*)(">)+')
p100= re.compile('(a name=)+(.*)(-)+(.*)(></a>)+')
q1= r"\1\2\3\4_\6\7"
q2= r"\1\2_\4\5"

def massreplace():
    editfile = open("C:\Program Files\Credit Risk Management\Masseditor
\editfile.txt")
    filestring = editfile.read()
    filelist = filestring.splitlines()

    for i in range(len(filelist)):
        source = open(filelist[i])
        starttext = source.read()

        for i in range (13):
            interimtext = p1.sub(q1, starttext)
            interimtext= p2.sub(q2, interimtext)
            interimtext= p100.sub(q2, interimtext)
        source.close()
        source = open(filelist[i],"w")
        source.write(finaltext)
        source.close()

massreplace()

I'll try that and see how it works...



From steve at holdenweb.com  Wed Sep 19 08:22:11 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 19 Sep 2007 08:22:11 -0400
Subject: How to know the starting point
In-Reply-To: <96489.19792.qm@web8706.mail.in.yahoo.com>
References: <96489.19792.qm@web8706.mail.in.yahoo.com>
Message-ID: <fcr49g$n21$1@sea.gmane.org>

Raj kumar wrote:
> Hi,
> I need help regarding the starting point in python project,
> As we can find main() function in java class to know the starting class 
> in java,
> what is the starting point in python project?
> How to find the starting point.
> Thank you

The starting point is the top of the file. Class and def statements are 
executable, and bind their names to the definitions. The bodies are this 
compiled, but the compiled code is only executed when a call is made 
(which avoids forward referencing problems, by and large: names are 
late-bound).

So the interpreter just starts at the top and runs through the code in 
sequence.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From daniel.j.larsson at gmail.com  Fri Sep  7 06:03:10 2007
From: daniel.j.larsson at gmail.com (Daniel Larsson)
Date: Fri, 7 Sep 2007 12:03:10 +0200
Subject: Class design (information hiding)
In-Reply-To: <fbr2gg$ipg$1@online.de>
References: <fbr2gg$ipg$1@online.de>
Message-ID: <2bfa72fa0709070303m66c791cbn7e87d64944dd104c@mail.gmail.com>

On 9/7/07, Alexander Eisenhuth <newsuser at stacom-software.de> wrote:
>
> Hi all,
>
> I'm wodering how the information hiding in python is ment. As I understand
> there
>   doesn't exist public / protected / private  mechanism, but a '_' and
> '__'
> naming convention.
>
> As I figured out there is only public and private possible as speakin in
> "C++
> manner". Are you all happy with it. What does "the zen of python" say to
> that
> design? (protected is useless?)


Strictly speaking, everything is public in python. Members prefixed with
"__" just get name mangled. But conceptually, yes, there is only public and
private members. Information hiding is based on convention, otherwise it
would be hard to write debuggers in python, which by definition wants to
break the information hiding principle. If you're not writing a debugger,
doc generator, or other type of meta level program, follow the conventions
of not peeking under the hood.

class A:
>         def __init__(self):
>                 self.__z = 1
>                 self._z = 2
>                 self.z = 3
>         def _getX(self):
>                 return "X"
>         def __getY(self):
>                 return "Y"
>         def doAnything(self):
>                 print self.__getY()
>
>
> class B(A):
>         def __init__(self):
>                 A.__init__(self)
>                 print dir (self)
> >>> b = B()
> ['_A__getY', '_A__z', '__doc__', '__init__', '__module__', '_getX', '_z',
> 'doAnything', 'z']
>
> I was a bit surprised about '_A__getY' and '_A__z'.


This is so that in class B, you can also have members called __getY and __z,
and they won't interfere with class A (they'll be called _B__getY and _B__z
respectively ).

What would you say to a C++ Programmer about class interfaces in big Python
> systems? What is the idea behind the _ and __ naming.


As a rough analogy:

__name -> private
_name -> protected

Use or don't use '_'
> methods ? (As Designer of the software, as Programmer of the software)


I don't know if you're making a distinction here between "designer" and
"programmer". Are you meaning "implementer of library" and "user of
library"? As a user of a library, never ever explicitly call members
starting with an underscore.

Regards Alexander
>
>
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From jcd at sdf.lonestar.org  Thu Sep 13 16:59:45 2007
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Thu, 13 Sep 2007 16:59:45 -0400
Subject: Decimal formatting
In-Reply-To: <1189716651.810481.260850@y42g2000hsy.googlegroups.com>
References: <1189716651.810481.260850@y42g2000hsy.googlegroups.com>
Message-ID: <20070913205945.GB5674@sdf.lonestar.org>

On Thu, Sep 13, 2007 at 01:50:51PM -0700, Harlin Seritt wrote regarding Decimal formatting:
> 
> Cant believe I have to post this and get help... and can't believe I
> couldnt Google it reasonably well enough... I need to take a float
> variable and have it display as a string to always have two decimal
> places:
> 
> 12.3333 -> 12.33
> 1.0 -> 1.00
> etc...
> 
> Anyone willing to help with this one?
> 
> thanks,
> 
> Harlin
> 

f = 12.333333
i = 10
f_output = "%0.2f" % f
i_output = "%0.2f" % i


Cheers,
Cliff



From sigmarCdS at hotmail.com  Mon Sep 24 07:34:45 2007
From: sigmarCdS at hotmail.com (jonny)
Date: Mon, 24 Sep 2007 04:34:45 -0700
Subject: rules from an xml file
Message-ID: <1190633685.275142.264540@r29g2000hsg.googlegroups.com>

I have a python code that manages some parameters using some variable
rules that may change from day to day. I'd like that the code will
self-modify according to rules parsed from a xml file:

example:

<rules>
   <rule01>
      <if>
		<or>
			<lessthan par_1="glicemyAtMorning" par_2="80"/>
			<lessthan par_1="glicemyAtNight" par_2="80"/>
			<and>
				<greaterthan par_1="glicemyAtMorning" par_2="0"/>
				<or>
					<equalto par_1="urine" par_2="0"/>
					<equalto par_1="urine" par_2="+/-"/>
					<equalto par_1="urine" par_2="+"/>
				</or>
			</and>
		</or>
	</if>
        <then>
           <sendmessage>Something is wrong!</sendmessage>
        </then>
   </rule01>
   <rule02> ...  </rule02>
   <rule03> ...   </rule03>
</rules>

Due to the fact that rules may change, I have to manage the python
program, parsing the whole xml file, and self-modify the python code
according to these variable rules.
How can I do?



From jelleferinga at gmail.com  Thu Sep  6 12:12:11 2007
From: jelleferinga at gmail.com (jelle)
Date: Thu, 06 Sep 2007 16:12:11 -0000
Subject: initializing cooperative method
Message-ID: <1189095131.853954.233660@r34g2000hsd.googlegroups.com>

Hi,

I'm writing a bunch of abstract classes and I'd like to delegate the
arguments of the concrete class the to abstract one. I was surprised
to see that the print statement in the abstract class isn't executed.
But moreover, I'd like to find out an idiom that allows one to
delegate arguments in the inherited class. Any ideas?

Thanks,

-jelle



    class Abstract(object):
        def __init__(self, a='a', b='b'):
            self.a, self.b = a, b
            print a, b

    class Concrete(Abstract):
        def __init__(self, a='AAA', b='BBB'):
            super(Abstract, self).__init__( a=a, b=b )
            print a, b

    c = Concrete(a=1)
    >>> c = Concrete(a=1)
    1 BBB



From paul.hankin at gmail.com  Fri Sep 28 18:20:54 2007
From: paul.hankin at gmail.com (Paul Hankin)
Date: Fri, 28 Sep 2007 15:20:54 -0700
Subject: Checking for the existence of Duplicates
In-Reply-To: <qleLi.81762$Lu.68580@bignews8.bellsouth.net>
References: <qleLi.81762$Lu.68580@bignews8.bellsouth.net>
Message-ID: <1191018054.695826.73470@57g2000hsv.googlegroups.com>

On Sep 28, 10:27 pm, AndyB <andrewblakes... at gmail.com> wrote:
> ...
> This is in a program that generates random numbers to do a brute force
> solve on a sudoku-like puzzle.  Once a certain level of difficulty in
> the puzzle is reached, performance goes off a cliff because the
> duplicate checking code, although fast, is executed so many times.

For a sudoku solver, you may be better dodging the problem, and
maintaining a set per row, column and box saying which numbers have
been placed already - and thus avoiding adding duplicates in the first
place. It may be better to use a bitfield instead (ie use bits 1..9 of
an int to represent these sets). You should also check out Donald
Knuth's 'Dancing Links' algorithm as a clever implementation of a
brute-force search that works perfectly for sudoku solving. (It uses
linked lists, but the idea still works in python).

But to answer your actual question:

> I have found a lot of material on removing duplicates from a list, but I
> am trying to find the most efficient way to just check for the existence
> of duplicates in a list.  Here is the best I have come up with so far:
>
>              CheckList = [x[ValIndex] for x in  self.__XRList[z]]
>              FilteredList = filter((lambda x:x != 0),CheckList)
>              if len(FilteredList) > len(sets.Set(FilteredList)): return

In general, the natural way to test for duplicates is as you have it,
except that set is now built-in, so you can write
    def has_no_duplicates(x):
        return len(x) == len(set(x))

But in your case, you're having to construct the list and filter, so
it's better just to loop and do everything at once:

found = set()
for x in self.__XRList[z]:
    cell = x[ValIndex]
    if cell != 0 and cell in found:
        return False
    found.add(cell)

Since your elements are probably numbers 1 to 9 (or 0), you might use
bitfields. I'd expect this to be faster, but you should check:

found = 0
for x in self.__XRList[z]:
    cellbit = 1 << x[ValIndex]
    if cellbit != 1 and (cellbit & found):
        return False
    found |= cellbit

--
Paul Hankin



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Sep 11 03:45:15 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 11 Sep 2007 09:45:15 +0200
Subject: newbie: stani's python editor if-else
In-Reply-To: <1189484688.520933.25000@22g2000hsm.googlegroups.com>
References: <1189484688.520933.25000@22g2000hsm.googlegroups.com>
Message-ID: <46e6478c$0$28487$426a74cc@news.free.fr>

madzientist a ?crit :
> hi,

> two quick questions:
> 
> a) i am using SPE (latest version) and for some reason, when i type,
> say
> 
> if 1==2:
>     print "not equal"
>     else:
>           print "equal"
> 
> the else is at the same indentation level as the preceding print
> statement, and i get a syntax error

Obviously. As you know, in Python, indentation is signifiant.

> why doesn't spe automatically put the else at the level of the if
> statement ? 

I don't know. Perhaps you should ask the author ?

> what am i dong wrong ?

Mmm, let's see.... Posting on the wrong place, perhaps ?-)

> once i manually change the
> indentation, the code snippet runs perfectly.

Indeed.

> b) if this is not the group for such elementary questions, please do
> let me know.

Ok, since you ask for it : this is not the group for problems related to 
SPE.

You probably want the SPE mailing-list (if it exists), or whatever the 
project page offers as a mean of sending feedback to the author.

Python-related questions, even elementary ones (provided you at least 
took time to read the official tutorial), are of course welcome !-)

HTH


From f.guerrieri at gmail.com  Wed Sep  5 06:29:58 2007
From: f.guerrieri at gmail.com (Francesco Guerrieri)
Date: Wed, 5 Sep 2007 12:29:58 +0200
Subject: concise code (beginner)
In-Reply-To: <13dsvqrqivtf092@corp.supernews.com>
References: <13dsvqrqivtf092@corp.supernews.com>
Message-ID: <79b79e730709050329n393489c9jc956211da4065118@mail.gmail.com>

On 9/5/07, bambam <david at asdf.asdf> wrote:
>
> I have about 30 pages (10 * 3 pages each) of code like this
> (following). Can anyone suggest a more compact way to
> code the exception handling? If there is an exception, I need
> to continue the loop, and continue the list.
>
> Steve.
>
> -----------------------------------
> for dev in devs
>     try:
>         dev.read1()
>     except
>         print exception
>         remove dev from devs
>
> for dev in devs
>     try:
>         dev.read2()
>     except
>         print exception
>         remove dev from devs
>
> for dev in devs
>     try:
>         dev.read3()
>     except
>         print exception
>         remove dev from devs
>
> etc.
>


well the first thought is:  why don't you put all the calls in a single for
loop?
for dev in devs:
try:
    call the methods on dev (instead of explicitly elencating all of them
there could and should be other solutions more mantainable)
except:
    flag dev as unusable

Modifying the sequence you are iterating over can be tricky.


francesco
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From arkanes at gmail.com  Wed Sep 12 12:00:03 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 12 Sep 2007 11:00:03 -0500
Subject: Python 3K or Python 2.9?
In-Reply-To: <1i4bjb8.63ihk49vs6c8N%aleax@mac.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <Xns99A98AE12D514duncanbooth@127.0.0.1>
	<1i4bjb8.63ihk49vs6c8N%aleax@mac.com>
Message-ID: <4866bea60709120900k35d30132yafd8fad0aeb0074d@mail.gmail.com>

On 9/12/07, Alex Martelli <aleax at mac.com> wrote:
> Duncan Booth <duncan.booth at invalid.invalid> wrote:
>    ...
> > As for omitting 'self' from method definitions, at first site you might
> > think the compiler could just decide that any 'def' directly inside a
> > class could silently insert 'self' as an additional argument. This
> > doesn't work though because not everything defined in a class has to be
> > an instance method: static methods don't have a self parameter at all,
> > class methods traditionally use 'cls' instead of 'self' as the name of
> > the first parameter and it is also possible to define a function inside
> > a class block and use it as a function. e.g.
>
> Actually you could do the "magic first-parameter insertion" just when
> returning a bound or unbound method object in the function's __get__
> special method, and that would cover all of the technical issues you
> raise.  E.g.:
>

> > class Weird:
> >    def factory(arg):
> >        """Returns a function based on its argument"""
> >
> >    foo = factory("foo")
> >    bar = factory("bar")
> >    del factory
> >
> > When factory is called, it is a simple function not a method. If it had
>
> Sure, that's because the function object itself is called, not a bound
> or unbound method object -- indeed. factory.__get__ never gets called
> here.
>
> > class C:
> >    def method(self): pass
> >
> > and
> >
> > def foo(self): pass
> > class C: pass
> > C.method = foo
> >
> > both of these result in effectively the same class (although the second
> > one has a different name for the method in tracebacks).
>
> And exactly the same would occur if the self argument was omitted from
> the signature and magically inserted when __get__ does its job.
>

This would mean that mixing functions and methods would have to be
done like you do it in C++, with lots of careful knowledge and
inspection of what you're working with. What would happen to stuff
like inspect.getargspec?

Besides, if self isn't in the argument spec, you know that the very
next thing people will complain about is that it's not implicitly used
for locals, and I'll punch a kitten before I accept having to read
Python code guessing if something is a global, a local, or part of
self like I do in C++.


From andreas.tawn at ubisoft.com  Fri Sep  7 05:08:02 2007
From: andreas.tawn at ubisoft.com (Andreas Tawn)
Date: Fri, 7 Sep 2007 11:08:02 +0200
Subject: interesting puzzle......try this you will be rewarded...
Message-ID: <8AEDA5E3386EA742B8C24C95FF0C7580013D0FF6@PDC-MAIL3.ubisoft.org>

>Basilisk96 wrote:
>> I remember seeing a more elaborate puzzle that involved coding,
>> cryptography knowledge, etc. to get through it. But what was the
link,
>> I forget now...
>
>There's this one http://www.inwardhellix.net/
>
>I haven't played it yet so I can't vouch for its quality.  (am playing 
>it now)

Maybe http://www.pythonchallenge.com/ ?

Cheers,

Drea

Andreas Tawn
Lead Technical Artist
Ubisoft Reflections


From tjreedy at udel.edu  Tue Sep 18 23:00:10 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 18 Sep 2007 23:00:10 -0400
Subject: no more reload() in py3k
References: <1190165028.837799.220300@q3g2000prf.googlegroups.com>
Message-ID: <fcq3bk$udc$1@sea.gmane.org>

I believe Guido said on the Py3 dev list that reload should have been moved 
to one of the modules (maybe inspect) rather than removed completely (and 
that he missed it also).  So this appears to be an alpha1 glitch.

tjr





From pavlovevidence at gmail.com  Fri Sep 28 19:13:01 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 28 Sep 2007 16:13:01 -0700
Subject: Numeric command-line options vs. negative-number arguments
In-Reply-To: <Qo6dnV_HZetrm2DbnZ2dnUVZ_sejnZ2d@comcast.com>
References: <1190913250.198794.269530@k79g2000hse.googlegroups.com>
	<fdgpic$ssu$00$1@news.t-online.com>
	<0a6dnQmBPIzuqmHbnZ2dnUVZ_vihnZ2d@comcast.com>
	<87ejgj4lpy.fsf_-_@benfinney.id.au>
	<X5adnVivJZ2wGWHbnZ2dnUVZ_tyknZ2d@comcast.com>
	<87wsub2s4w.fsf@benfinney.id.au>
	<Qo6dnV_HZetrm2DbnZ2dnUVZ_sejnZ2d@comcast.com>
Message-ID: <1191021181.401767.41040@n39g2000hsh.googlegroups.com>

On Sep 28, 9:51 am, Steven Bethard <steven.beth... at gmail.com> wrote:
> Ben Finney wrote:
> > Steven Bethard <steven.beth... at gmail.com> writes:
> >> Argparse knows what your option flags look like, so if you specify
> >> one, it knows it's an option.  Argparse will only interpret it as a
> >> negative number if you specify a negative number that doesn't match
> >> a known option.
>
> > That's also irritating, and violates the expected behaviour. It leads
> > to *some* undefined options being flagged as errors, and others
> > interpreted as arguments. The user shouldn't need to know the complete
> > set of options to know which leading-hyphen arguments will be treated
> > as options and which ones won't.
>
> > The correct behaviour would be to *always* interpret an argument that
> > has a leading hyphen as an option (unless it follows an explicit '--'
> > option), and complain if the option is unknown.
>
> It was decided that practicality beats purity here. Arguments with
> leading hyphens which look numeric but aren't in the parser are
> interpreted as negative numbers. Arguments with leading hyphens which
> don't look numeric and aren't in the parser raise errors. Sure, it's not
> the pure answer, but it's the practical answer: "-123" is much more
> likely to be a negative number than an option.

What if (for example) you define a option "-3", and also accept
numerical arguments on the command line.  Then you could get sudden
unexpected behavior if you input the wrong number:

"./hello -1"  works ok.
"./hello -2"  works ok.
"./hello -3"  ... whoops, now the negative number is suddenly an
option.

Granted, it would be stupid for a program to do that, but it suggests
to me that it's probably a good idea to treat all negative numbers the
same.  I.e. if there are any numerical options, then all negative
numbers are treated as options.  If there are none, then negative
numbers are treated as numbers.


Carl Banks



From steve at holdenweb.com  Wed Sep 26 09:30:52 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 26 Sep 2007 09:30:52 -0400
Subject: setuptools without unexpected downloads
In-Reply-To: <fddivk$f90$1@sea.gmane.org>
References: <87ejgmklep.fsf@benfinney.id.au><874phhlupi.fsf@benfinney.id.au>	<5lumarFae888U1@mid.uni-berlin.de>	<1190802526.695391.326220@n39g2000hsh.googlegroups.com>	<5lurorFa92euU1@mid.uni-berlin.de>	<1190805012.275901.227570@57g2000hsv.googlegroups.com>	<5luv0iFaai82U1@mid.uni-berlin.de>	<1190808836.056298.232640@57g2000hsv.googlegroups.com>
	<fddivk$f90$1@sea.gmane.org>
Message-ID: <fddmua$t17$1@sea.gmane.org>

Fredrik Lundh wrote:
> Paul Boddie wrote:
> 
>> P.S. Of course, the package maintainer problem manifests itself most
>> prominently on Windows where you often see people asking for pre-built
>> packages or installers.
> 
> for the record, I'd love to see a group of volunteers doing stuff like 
> this for Windows.  there are plenty of volunteers that cover all major 
> Linux/*BSD distributions (tons of thanks to everyone involved in this!), 
> but as far as I can remember, nobody has ever volunteered to do the same 
> for Windows.
> 
I'd like to see something like this happen, too, and if a group of 
volunteers emerges I'll do what I can through the PSF to provide 
resources. Activities that benefit the whole community (or a large part 
of it) are, IMHO, well worth supporting.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From jcd at sdf.lonestar.org  Mon Sep 10 08:48:24 2007
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Mon, 10 Sep 2007 08:48:24 -0400
Subject: encoding latin1 to utf-8
In-Reply-To: <1189427146.723304.270600@22g2000hsm.googlegroups.com>
References: <1189427146.723304.270600@22g2000hsm.googlegroups.com>
Message-ID: <20070910124824.GC5084@sdf.lonestar.org>

On Mon, Sep 10, 2007 at 12:25:46PM -0000, Harshad Modi wrote regarding encoding latin1 to utf-8:
> Path: news.xs4all.nl!newsspool.news.xs4all.nl!transit.news.xs4all.nl!newsgate.cistron.nl!xs4all!news.glorb.com!postnews.google.com!22g2000hsm.googlegroups.com!not-for-mail
> 
> hello ,
>  I make one function for encoding latin1 to utf-8. but i think it is
> not work proper.
> plz guide me.
> 
> it is not get proper result . such that i got "Belgi???" using this
> method, (Belgium)  :
> 
> import codecs
> import sys
> # Encoding / decoding functions
> def encode(filename):
>  file = codecs.open(filename, encoding="latin-1")
>  data = file.read()
>  file = codecs.open(filename,"wb", encoding="utf-8")
>  file.write(data)
> 
> file_name=sys.argv[1]
> encode(file_name)

Some tips to help you out. 

1.  Close your filehandles when you're done with them.
2.  Don't shadow builtin names.  Python uses the name file, and binding it to your own function can have ugly side effects that manifest down the road.

So perhaps try the following:

import codecs

def encode(filename):
	read_handle = codecs.open(filename, encoding='latin-1')
	data = read_handle.read()
	read_handle.close()
	write_handle = codecs.open(filename, 'wb', encoding='utf-8')
	write_handle.write(data)
	write_handle.close()

For what it's worth though, I couldn't reproduce your problem with either your code or mine.  This is not too surprising as all the ascii characters are encoded identically in utf-8 and latin-1.  So your program should output exactly the same file as it reads, if the contents of the file just read "Belgium"

Cheers,
Cliff


From bronger at physik.rwth-aachen.de  Wed Sep  5 06:45:26 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Wed, 05 Sep 2007 12:45:26 +0200
Subject: Wanted: safe codec for filenames
Message-ID: <87sl5tcrw9.fsf@wilson.homeunix.com>

Hall?chen!

I'd like to map general unicode strings to safe filename.  I tried
punycode but it is case-sensitive, which Windows is not.  Thus,
"Hallo" and "hallo" are mapped to "Hallo-" and "hallo-", however, I
need uppercase Latin letters being encoded, too, and the encoding
must contain only lowercase Latin letters, numbers, underscores, and
maybe a little bit more.  The result should be more legible than
base64, though.

Has anybody created such a codec already?

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From brown at esteem.com  Thu Sep  6 18:39:13 2007
From: brown at esteem.com (Tom Brown)
Date: Thu, 6 Sep 2007 15:39:13 -0700
Subject: why should I learn python
In-Reply-To: <1189117798.506367.278560@y42g2000hsy.googlegroups.com>
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
	<LC_Di.8274$924.7987@newssvr23.news.prodigy.net>
	<1189117798.506367.278560@y42g2000hsy.googlegroups.com>
Message-ID: <200709061539.13537.brown@esteem.com>

On Thursday 06 September 2007 15:29, windandwaves wrote:
> On Sep 7, 9:50 am, James Stroud <jstr... at mbi.ucla.edu> wrote:
> > Seewww.python.org. Trust us all when we say that its the best.
>
> I get that feeling - yes.  Question is:
>
> 1. what is it good for?
> 2. why is it so good?
>
> I would love to hear some opinions.

1. It is good for just about everything except kernel modules.
2. Ease of use.


From zentraders at gmail.com  Tue Sep 25 13:07:37 2007
From: zentraders at gmail.com (Zentrader)
Date: Tue, 25 Sep 2007 10:07:37 -0700
Subject: Nested For and While Statements
In-Reply-To: <1190701545.148197.191090@o80g2000hse.googlegroups.com>
References: <1190662087.403000.16290@g4g2000hsf.googlegroups.com>
	<fd94av$fj8$1@daisy.noc.ucla.edu>
	<1190664644.936871.57050@57g2000hsv.googlegroups.com>
	<1190701545.148197.191090@o80g2000hse.googlegroups.com>
Message-ID: <1190740057.329424.57230@r29g2000hsg.googlegroups.com>

Scope had to do with "visibility" and not with how memory was
allocated.  Scope means, can this line of code access that block of
memory.  Note that in list comprehension, [x for x in (1, 2, 3)], the
for loop allocates memory the same way, but the scope changes so that
"x" is visible outside the for loop, so I guess we will have to agree
to disagree.



From jstucklex at attglobal.net  Sun Sep 30 13:55:28 2007
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Sun, 30 Sep 2007 13:55:28 -0400
Subject: which language allows you to change an argument's value?
In-Reply-To: <1191170989.227928.252880@g4g2000hsf.googlegroups.com>
References: <1191149233.346818.246170@22g2000hsm.googlegroups.com>
	<f891e9884d1151a8d46e8be15e43b788@ruby-forum.com>
	<1191170989.227928.252880@g4g2000hsf.googlegroups.com>
Message-ID: <W6adnfctA_ArfmLbnZ2dnUVZ_g-dnZ2d@comcast.com>

Summercool wrote:
> On Sep 30, 4:18 am, 7stud -- <dol... at excite.com> wrote:
>> SpringFlowers AutumnMoon wrote:
>>> we have no way
>>> of knowing what we pass in could get changed.
>> Sure you do.  You look at the function's signature.  In order to use
>> someone else's library, you have to know the function's signature.  And
>> the signature explicitly tells you whether the value you pass in could
>> be changed.
> 
> do you mean in C++?  I tried to find signature in two C++ books and it
> is not there.  Google has a few results but it looks something like
> prototype.  Is signature the same as the function prototype in the .h
> file?  If so, don't we usually just include <___.h> and forget about
> the rest.  Documentation is fine although in some situation, the
> descriptions is 2 lines, and notes and warnings are 4, 5 times that,
> and the users' discussing it, holding different opinion is again 2, 3
> times of that length.  I think in Pascal and C, we can never have an
> argument modified unless we explicitly allow it, by passing in the
> pointer (address) of the argument.
>

You need to get more C++ books :-).  You generally won't find them in 
basic books, but some of the more advanced ones talk about function 
signatures.

A C++ function's signature is dependent on the function name, number of 
parameters being passed, and the type of each parameter.  This is passed 
onto the linker.  In any C++ program, every function signature must be 
unique.

But in this case he's a little incorrect.  You *could* look at the 
function's signature, but it's much easier just to look at the 
function's declaration.

> also i think for string, it is a bit different because by default,
> string is a pointer to char or the address of the first char in C and C
> ++.  So it is like passing in the address already.  it is when the
> argument n is something like 1 that makes me wonder.
> 
> 


-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From http  Sat Sep  8 00:15:50 2007
From: http (Paul Rubin)
Date: 07 Sep 2007 21:15:50 -0700
Subject: Generating a unique identifier
References: <13e2fgbbpsatm39@corp.supernews.com>
	<7x3axq7a8a.fsf@ruckus.brouhaha.com>
	<7xodgejx3l.fsf@ruckus.brouhaha.com>
	<13e43ups034ld13@corp.supernews.com>
Message-ID: <7xwsv1n66h.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> writes:
> > Sorry, make that 32 or 40 instead of 10, if the number of id's is large,
> > to make birthday collisions unlikely.
> 
> I did a small empirical test, and with 16 million ids, I found no 
> collisions.

16 million 32-byte ids?  With string and dictionary overhead that's
probably on the order of 1 GB.  Anyway, 16 bytes is enough, as
mentioned elsewhere.

> However, I did find that trying to dispose of a set of 16 million short 
> strings caused my Python session to lock up for twenty minutes until I 
> got fed up and killed the process. Should garbage-collecting 16 million 
> strings really take 20+ minutes?

Maybe your system was thrashing, or maybe the GC was happening during
allocation (there was some discussion of that a while back).

> > If you don't want the id's to be that large, you can implement a Feistel
> I'm not sure that I need it, but I would certainly be curious to see it.

I posted some code elsewhere in the thread.


From phil at riverbankcomputing.co.uk  Sun Sep 16 13:28:45 2007
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Sun, 16 Sep 2007 18:28:45 +0100
Subject: SVG to raster conversion.
In-Reply-To: <46ED5283.3030004@sdf.lonestar.org>
References: <46ED5283.3030004@sdf.lonestar.org>
Message-ID: <200709161828.45145.phil@riverbankcomputing.co.uk>

On Sunday 16 September 2007, J. Cliff Dyer wrote:
> Does anybody know a good solution (preferably in python) for rasterizing
> SVG or other vector graphics.
>
> I'm thinking something like
>
> vector_image = SVGFile(path_to_image)
> raster_image = vector_image.rasterize(format, (width, height), dpi)
> raster_image.write(out_file)
>
> Thanks for any pointers you might have.

PyQt has QSVGRenderer (http://doc.trolltech.com/4.3/qsvgrenderer.html) which 
will render to a QPixmap (http://doc.trolltech.com/4.3/qpixmap.html) which 
you can save in a number of standard formats.

Phil


From bj_666 at gmx.net  Sat Sep 22 08:34:21 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 22 Sep 2007 12:34:21 GMT
Subject: Writing Object Data to Disk
References: <mailman.3168.1190445604.2656.python-list@python.org>
	<mailman.922.1190461411.2658.python-list@python.org>
Message-ID: <5lkgedF8gic1U7@mid.uni-berlin.de>

On Sat, 22 Sep 2007 17:13:14 +0530, Amit Kumar Saha wrote:

> BTW, do we have something like array of objects here?

Like someone already said: lists.

Ciao,
	Marc 'BlackJack' Rintsch


From gagsl-py2 at yahoo.com.ar  Thu Sep  6 11:44:42 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 06 Sep 2007 08:44:42 -0700
Subject: ImportError depending on the calling module
In-Reply-To: <1189079269.279716.254560@50g2000hsm.googlegroups.com>
References: <1189079269.279716.254560@50g2000hsm.googlegroups.com>
Message-ID: <1189093482.137051.73770@r29g2000hsg.googlegroups.com>

On 6 sep, 08:47, Samuel <knipk... at gmail.com> wrote:

> Given the following directory structure:
>
> ---------
> |-- Obj.py
> |-- __init__.py
> |-- foo
> |   |-- FooTest.py
> |   `-- __init__.py
> `-- start1.py
> ---------

The container looks like a package (you didn't tell us the name).
Should be placed somewhere accessible thru sys.path
start1.py does NOT belong to the package, neither start2.py; place
them somewhere else. They should import the package as any other
client code, without doing any import tricks nor playing with
sys.path.

--
Gabriel Genellina



From paddy3118 at googlemail.com  Sat Sep  1 03:24:17 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Sat, 01 Sep 2007 07:24:17 -0000
Subject: list index() (OT)
In-Reply-To: <mailman.254.1188629922.28954.python-list@python.org>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<1cnfd31du01el95u70o8mjn9cb5r5aluiu@4ax.com>
	<mailman.254.1188629922.28954.python-list@python.org>
Message-ID: <1188631457.050512.103060@y42g2000hsy.googlegroups.com>

On Sep 1, 7:57 am, "Hendrik van Rooyen" <m... at microcorp.co.za> wrote:
> "Richie Hindle" <richi...ian.com> wrote:
> > But - the word for someone who posts to the internet with the intention of
> > stirring up trouble derives from the word for what fishermen do, not from
> > the word for something that lives under a bridge.  It derives from "trolling
> > for suckers" or "trolling for newbies".
>
> So am I right in asserting that there is a difference in pronunciation
> of the noun and the verb?
>
> He is a Troll - like the excellent frolic example
> He likes to Troll - rhymes with roll?
>
> - Hendrik

No difference. A troll is a troll is a troll.

:-)

- Paddy.




From hniksic at xemacs.org  Thu Sep 27 10:15:21 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Thu, 27 Sep 2007 16:15:21 +0200
Subject: PyObject_CallObject: difference between functions and class
	methods
References: <1190900895.635795.262350@y42g2000hsy.googlegroups.com>
Message-ID: <87ejgkurd2.fsf@mulj.homelinux.net>

[ Note that there is now a mailing list dedicated to the C API:
http://mail.python.org/mailman/listinfo/capi-sig ]

mauro <mauro.tiz at gmail.com> writes:

> I am trying to call within a C extension a Python function provided as
> an argument by the user with: PyObject_Call(). The C extension should
> work also if the user supplies a class method, but in this case I am
> getting an error. Do I need to explicitly pass 'self' as an argument
> to PyObject_Call()?

You don't.  The reference to self will be added automatically when
invoking the function you receive as object.method.

> if ((tmp_args = PyTuple_New(1)) == NULL)
> 		PyErr_SetString( PyExc_ReferenceError, "attempt to access a null-
> pointer" );
> PyTuple_SetItem(tmp_args, 0, paramlist);

Maybe you are mismanaging the reference count -- PyTuple_SetItem
steals the refcount of its argument.  Anyway, why not use
PyObject_CallFunction or PyObject_CallFunctionObjArgs?  For example:

PyObject *
mymodule_main(PyObject *ignored, PyObject *func)
{
  PyObject *result, *my_param;
  /* ... do something, e.g. create my_param ... */

  /* call func */
  result = PyObject_CallFunction(received_func, "O", my_param);
  Py_DECREF(my_param);  /* assuming you no longer need it */
  if (!result)
    return NULL;

  /* ... do something with result ... */

  Py_DECREF(result);
  Py_INCREF(Py_None);
  return Py_None;      /* or whatever */
}


From rikard.bosnjakovic at gmail.com  Sat Sep 15 00:07:31 2007
From: rikard.bosnjakovic at gmail.com (Rikard Bosnjakovic)
Date: Sat, 15 Sep 2007 06:07:31 +0200
Subject: [Tutor] Is there some sort of Python Error log.
In-Reply-To: <eb79828c0709141650r238b6699x6a3a3dedd3d3c157@mail.gmail.com>
References: <eb79828c0709141650r238b6699x6a3a3dedd3d3c157@mail.gmail.com>
Message-ID: <d9e88eaf0709142107p16a8b4d5le61bbb9406dc6e32@mail.gmail.com>

On 15/09/2007, Lamonte Harris <pyth0nc0d3r at gmail.com> wrote:

> Command prompt is a pain and it would be pretty nice to have this feature.

If you are using a Unixish system, do "python myscript.py 2> error.log".


-- 
- Rikard - http://bos.hack.org/cv/


From darien.watkins at gmail.com  Tue Sep 11 14:56:27 2007
From: darien.watkins at gmail.com (darien.watkins at gmail.com)
Date: Tue, 11 Sep 2007 11:56:27 -0700
Subject: Python Database Apps
In-Reply-To: <mailman.387.1189521302.2658.python-list@python.org>
References: <1189479130.905136.196820@r34g2000hsd.googlegroups.com>
	<mailman.387.1189521302.2658.python-list@python.org>
Message-ID: <1189536987.259907.68650@e34g2000pro.googlegroups.com>

On Sep 11, 9:25 am, Ed Leafe <e... at leafe.com> wrote:
> On Sep 10, 2007, at 10:52 PM, darien.watk... at gmail.com wrote:
>
> > Kindof a poll, kindof curiosity...
>
> > What is your favorite python - database combination?  I'm looking to
> > make an app that has a local DB and a server side DB.  I'm looking at
> > python and sqlite local side and sql server side.
>
>         Are you asking for opinions on what sort of database engine to use?
> Or are you trying to get a feel for what people use to develop their
> apps? Are you looking for a web app, or a desktop app, or a non-UI app?
>
> -- Ed Leafe
> --http://leafe.com
> --http://dabodev.com

It would help to get a feel of what is the most popular combination
for people to develop their apps.  It's gonna be a desktop app.  The
database engine is going to be the critical component.  I like sqlite
so that I don't need a database server on the client side.  It would
help though if there is a way to sync between multiple clients to a
central server database.  That's the tough part.  To give you a better
idea of what i'm trying to do, I am trying to write an app where
multiple technicians have an issue tracker that is available both
offline and online.  I was looking to use sqlite as the local side
that would sync new and updated issues to a central server when
online.  Any technician may work on any issue.  Generally they will
not be working on the same issue at the same time.  The technicians
are geographically diverse (anywhere in the southeast US, not in an
office.)

Thanks for the feedback so far...

Darien



From bronger at physik.rwth-aachen.de  Thu Sep  6 02:38:45 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Thu, 06 Sep 2007 08:38:45 +0200
Subject: Any syntactic cleanup likely for Py3? And what about doc
	standards?
References: <46DEFD2E.5050205@sbcglobal.net>
	<mailman.112.1189022368.2658.python-list@python.org>
	<87tzq898e2.fsf@wilson.homeunix.com>
	<mailman.118.1189034379.2658.python-list@python.org>
	<87ejhc8z23.fsf@wilson.homeunix.com> <zwKDi.10347$kI5.1097@trnddc08>
	<13dv7biiu70252d@corp.supernews.com>
Message-ID: <87wsv4xpqi.fsf@wilson.homeunix.com>

Hall?chen!

Steven D'Aprano writes:

> On Thu, 06 Sep 2007 03:31:43 +0000, Alan Isaac wrote:
>
>>> Their only flaw is that they are not "virtual" (in C++ speak).
>>> In other words, you can't pass a "self" parameter to them.
>> 
>> http://www.kylev.com/2004/10/13/fun-with-python-properties/
>
>
> I'm not 100% sure I get what problem that piece of code is
> supposed to solve, but if I have understood it, the obvious
> solution is to use inheritance, not nasty tricks with lambdas.

Yes, it is the right solution for the wrong problem.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From horpner at yahoo.com  Fri Sep  7 13:22:03 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Fri, 07 Sep 2007 17:22:03 GMT
Subject: interesting puzzle......try this you will be rewarded...
References: <1189072576.997085.32360@r29g2000hsg.googlegroups.com>
	<46e04138$0$16377$88260bb3@free.teranews.com>
	<IcYDi.1436$4J3.235@newssvr22.news.prodigy.net>
	<1189130241.529344.52950@57g2000hsv.googlegroups.com>
	<mailman.199.1189132820.2658.python-list@python.org>
Message-ID: <slrnfe2gtn.1rc.horpner@FIAD06.norwich.edu>

On 2007-09-07, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
> En Thu, 06 Sep 2007 22:57:21 -0300, Basilisk96 <basilisk96 at gmail.com>  
> escribi?:
>
>> I got to 14 :)
>>
>> It's rather silly.
>>
>> I remember seeing a more elaborate puzzle that involved coding,
>> cryptography knowledge, etc. to get through it. But what was the link,
>> I forget now...
>
> Me too, and I can't find that link either. #15 is a bit
> difficult for people outside US, and spelling on #21 is
> questionable, but I liked this woody thing :)

Y'all may be thinking of The Euler Project, which provides math
puzzles for programmers.

http://projecteuler.net/

-- 
Neil Cerutti
I pulled away from the side of the road, glanced at my mother-in-law and
headed over the embankment. --Insurance Claim Blooper


From bignose+hates-spam at benfinney.id.au  Thu Sep 27 21:34:01 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 28 Sep 2007 11:34:01 +1000
Subject: Numeric command-line options vs. negative-number arguments (was:
	getopt with negative numbers?)
References: <1190913250.198794.269530@k79g2000hse.googlegroups.com>
	<fdgpic$ssu$00$1@news.t-online.com>
	<0a6dnQmBPIzuqmHbnZ2dnUVZ_vihnZ2d@comcast.com>
Message-ID: <87ejgj4lpy.fsf_-_@benfinney.id.au>

Steven Bethard <steven.bethard at gmail.com> writes:

> In most cases, argparse (http://argparse.python-hosting.com/)
> supports negative numbers right out of the box, with no need to use
> '--':
> 
>     >>> import argparse
>     >>> parser = argparse.ArgumentParser()
>     >>> parser.add_argument('-a', type=int)
>     >>> parser.add_argument('b', type=int)
>     >>> args = parser.parse_args('-a -42 -123'.split())
>     >>> args.a
>     -42
>     >>> args.b
>     -123

That would be irritating. I've used many programs which have numbers
for their options because it makes the most sense, e.g. 'mpage' to
indicate number of virtual pages on one page, or any number of
networking commands that use '-4' and '-6' to specify IPv4 or IPv6.

If argparse treats those as numeric arguments instead of options,
that's violating the Principle of Least Astonishment for established
command-line usage (hyphen introduces an option).

-- 
 \       "I went to a general store. They wouldn't let me buy anything |
  `\                                  specifically."  -- Steven Wright |
_o__)                                                                  |
Ben Finney


From gnewsg at gmail.com  Mon Sep 10 10:08:33 2007
From: gnewsg at gmail.com (billiejoex)
Date: Mon, 10 Sep 2007 07:08:33 -0700
Subject: How can I test 'warnings' from testsuite?
Message-ID: <1189433313.296787.166060@22g2000hsm.googlegroups.com>

Hi there,
into a module of mine I 'warn' a message if a certain situation
occurs:


def add_anonymous_user(permissions=('r'):
      if 'w' in p:
          import warnings
          warnings.warn("it's not rencommended assigning 'w'
permission to anonymous user.", RuntimeWarning, stacklevel=2)


I'd like to test such event from test suite ("fail test if warn is not
raised") but don't know how.

Any suggestion?



From jcd at sdf.lonestar.org  Tue Sep 11 16:49:01 2007
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Tue, 11 Sep 2007 16:49:01 -0400
Subject: Car-ac-systems
In-Reply-To: <fdGdnWvRKpfqfnvbnZ2dneKdnZydnZ2d@eclipse.net.uk>
References: <5ko2rjF4om2bU1@mid.uni-berlin.de>
	<fdGdnWvRKpfqfnvbnZ2dneKdnZydnZ2d@eclipse.net.uk>
Message-ID: <20070911204901.GA6188@sdf.lonestar.org>

On Tue, Sep 11, 2007 at 07:50:33PM +0100, John Timney (MVP) wrote regarding Re: Car-ac-systems:
> 
> "Marc 'BlackJack' Rintsch" <bj_666 at gmx.net> wrote in message 
> news:5ko2rjF4om2bU1 at mid.uni-berlin.de...
> > On Tue, 11 Sep 2007 17:42:53 +0000, Zentrader wrote:
> >
> >> <snip>
> >> What is it about "please do not top-post" that you have difficulty
> >> understanding? Or do "MVP"s feel that their time is so much more
> >> valuable than anyone else's that they are free to ignore the norms?
> >>
> >> Who made this the norm?
> >
> > Common sense and (western) reading habits.
> >
> >> In my travels through web-land, it appears to be the opposite.
> >
> > You must travel strange territories.  ;-)
> >
> >> Don't waste space repeating everything in every post, and it wastes
> >> everyone's time by have to go over the same thing again and again.
> >
> > That's why you trim the quoted part to the minimum to understand what one
> > is answering.  Top posting and full quoting wastes time for people who
> > want to see the context because context and answer are way apart and in 
> > the
> > wrong order so one has to scroll back and forth to keep track of the
> > discussion.
> >
> > Ciao,
> > Marc 'BlackJack' Rintsch
> 
> 
> I like top posted threads, its my preferred response method - and actually 
> also how I prefer to read a thread.  Normally, I and the thread followers 
> are familiar with a threads context - and don't need to read down to get the 
> context of a response.  Not much of a hardship really and just as I give my 
> time freely in answering a thread - everyone else can chose freely to read 
> it or ignore.
> 
> I don't though have no issues with people who chose to bottom post, or 
> respond with the full thread if its relevent, or trim it.  If the answer is 
> relevent, I'll gladly spend the time reading it from any direction.
> 
> Regards
> 
> John Timney (MVP)

Thank you for your courtesy in bottom posting that comment, in spite of your personal preference.  It makes the group easier to follow.  

Personally, I have nothing against top-posted comments.  What really gets my panties in a bunch, however, are threads in which some replies are top-posted and some bottom posted.  Then, in order to get the full story you end up bouncing back and forth through the message and trying to remember how deeply nested the last post was.  

Cheers, and welcome to c.l.py.

Cliff


From danfike at gmail.com  Mon Sep 24 11:13:53 2007
From: danfike at gmail.com (danfike at gmail.com)
Date: Mon, 24 Sep 2007 15:13:53 -0000
Subject: Building Python with VC8 on x64 Vista
In-Reply-To: <46F52FFD.3040500@v.loewis.de>
References: <1190299551.573204.322440@57g2000hsv.googlegroups.com>
	<46F52FFD.3040500@v.loewis.de>
Message-ID: <1190646833.144905.40030@19g2000hsx.googlegroups.com>

On Sep 22, 10:08 am, "Martin v. L?wis" <mar... at v.loewis.de> wrote:
> > 1>py_dyn_test.obj : error LNK2001: unresolved external symbol
> > _Py_NoneStruct
>
> Could it be that py_dyn_test.obj is a x86 (not AMD64) object
> file? Run dumpbin.

Hmm - I've never used dumpbin, but I think I like it.

It doesn't look like these are x86, though. See below:

D:\....\py_dyn_test\x64\Debug>dumpbin /HEADERS py_dyn_test.obj
Microsoft (R) COFF/PE Dumper Version 8.00.50727.762
Copyright (C) Microsoft Corporation.  All rights reserved.


Dump of file py_dyn_test.obj

File Type: COFF OBJECT

FILE HEADER VALUES
            8664 machine (x64)
            ....


D:\....\3rdParty\Python25\libs>dumpbin /HEADERS python25_d.lib
Microsoft (R) COFF/PE Dumper Version 8.00.50727.762
Copyright (C) Microsoft Corporation.  All rights reserved.


Dump of file python25_d.lib

File Type: LIBRARY

FILE HEADER VALUES
            8664 machine (x64)
               3 number of sections
        46F3CED2 time date stamp Fri Sep 21 09:01:54 2007
             113 file pointer to symbol table
               8 number of symbols
               0 size of optional header
               0 characteristics

<snip>

  Version      : 0
  Machine      : 8664 (x64)
  TimeDateStamp: 46F3CED2 Fri Sep 21 09:01:54 2007
  SizeOfData   : 0000001E
  DLL name     : python25_d.dll
  Symbol name  : _Py_NoneStruct
  Type         : data
  Name type    : name
  Hint         : 900
  Name         : _Py_NoneStruct

<etc>



From http  Sun Sep  9 13:09:14 2007
From: http (Paul Rubin)
Date: 09 Sep 2007 10:09:14 -0700
Subject: Does shuffle() produce uniform result ?
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
	<mailman.243.1187955760.32294.python-list@python.org>
	<tooru_honda-7C82D1.10432725082007@wvnews01.netvigator.com>
	<tooru_honda-58C552.20355225082007@wvnews01.netvigator.com>
	<tooru_honda-978B9E.11304526082007@wvnews01.netvigator.com>
	<slrnfdnojg.inr.apardon@rcpc42.vub.ac.be>
	<7xejhfbsjo.fsf@ruckus.brouhaha.com>
	<slrnfdpup6.inr.apardon@rcpc42.vub.ac.be>
	<7xabs39bin.fsf@ruckus.brouhaha.com>
	<13drijhfqlvlk96@corp.supernews.com> <fbvmg0$1p3$3@lust.ihug.co.nz>
	<7xhcm4pl5m.fsf@ruckus.brouhaha.com>
	<cBMEi.2652$3Y1.1934@newssvr17.news.prodigy.net>
Message-ID: <7xwsuzdav9.fsf@ruckus.brouhaha.com>

Bryan Olson <fakeaddress at nowhere.org> writes:
> I haven't kept up. Has anyone exhibited a SHA-1 collision?

I don't think anyone has shown an actual collision, but apparently
there is now a known way to find them in around 2**63 operations.  I
don't know if it parallellizes as well as a brute force attack does.
If it does, then it's presumably within reach of the distributed
attacks like the ones used against DES in the late 1990's, given the
hardware speedups that have occurred since then.  NIST is trying to
phase out SHA-1 by 2010.

http://en.wikipedia.org/wiki/SHA1#Cryptanalysis_of_SHA-1
http://csrc.nist.gov/hash_standards_comments.pdf


From prikar20 at gmail.com  Wed Sep 19 23:46:08 2007
From: prikar20 at gmail.com (prikar20 at gmail.com)
Date: Thu, 20 Sep 2007 03:46:08 -0000
Subject: Sets in Python
In-Reply-To: <1190247922.835055.31950@y42g2000hsy.googlegroups.com>
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
	<CeB*qHeVr@news.chiark.greenend.org.uk>
	<1190235483.412972.81280@v23g2000prn.googlegroups.com>
	<1190239608.835359.51150@22g2000hsm.googlegroups.com>
	<1190244370.741482.6540@y27g2000pre.googlegroups.com>
	<1190247922.835055.31950@y42g2000hsy.googlegroups.com>
Message-ID: <1190259968.214528.158370@v29g2000prd.googlegroups.com>

On Sep 19, 5:25 pm, Mark Dickinson <dicki... at gmail.com> wrote:
> On Sep 19, 7:26 pm, Karthik Gurusamy <kar1... at gmail.com> wrote:
>
> > If I did, a = [10, 20] and I did d[a]= 'foo', then a.append(30).
> > If dict complains key error on d[a] now, I won't be surprised. If I do
> > d[[10, 20, 30]], I will be surprised if it doesn't find the item. Of
> > course, in today's behavior the above is syntax error.
>
> It sounds as though you're proposing something like the following:
>
> >>> k = mylist([1, 2])
> >>> d = {k : 'test'}
> >>> d[k]
> 'test'
> >>> k.append(3)
> >>> d[k]
>
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> KeyError: [1, 2, 3]
>
> So far, so good.  But how do you explain the following to a confused
> newcomer?
>
> >>> d.keys()
> [[1, 2, 3]]
> >>> k in d.keys()
> True
> >>> k in d
> False
> >>> d[k]
>
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> KeyError: [1, 2, 3]
>
> In other words, to repeat Sion Arrowsmith's question, what would you
> expect d.keys() to return after a key of d has been modified?

In the new model, it should be the value at the time of addition.
That is [1,2] (not [1,2,3]). This does mean a copy of key in
maintained internally in the dict. I think today that's not needed
(just a reference to the key's object is sufficient).

Again, this may not be the most elegant solution; neither seems to be
the current requirement that keys must be immutable. Fundamentally
dict is a mapping; underneath it could even use other elaborate
algorithms (say for integer keys, an avl tree) -- there is no reason
to expose the the quirks of hashing to the programmer.

Karthik
>
> Mark




From brice.fernandes at gmail.com  Sun Sep 23 12:28:44 2007
From: brice.fernandes at gmail.com (brice.fernandes at gmail.com)
Date: Sun, 23 Sep 2007 09:28:44 -0700
Subject: building a GUI
In-Reply-To: <mailman.940.1190560838.2658.python-list@python.org>
References: <1190557293.266783.251480@y42g2000hsy.googlegroups.com>
	<mailman.940.1190560838.2658.python-list@python.org>
Message-ID: <1190564924.417792.287930@o80g2000hse.googlegroups.com>

On Sep 23, 4:28 pm, stef mientki <stef.mien... at gmail.com> wrote:
> yadin wrote:
> > if i were up to make a GUI chich are the advantages of choosing python
> > over matlab or java?
>
> As MatLab has a very lousy GUI,
> any other language would be an advantage ;-)
>
> The best is Delphi,
> second is VB,
> then comes SciLab, Python, etc
> I don't know where Java fits in.
>
> But as Wildemar said, your question is much to broad.
>
> cheers,
> Stef

Form a newbie's point of view, Java's Swing Libraries (gui stuff) are
pretty easy to get to grips with, if a bit big. They are also
incredibly well documented, and are distributed by sun with the core
language.

Compared to most python toolkits, they are approximately as complex,
but far better documented. The other good thing compared to python is
their integration at the language API level rather than as a
supplementary module. A quick look at the 1.6 swing tutorial will tell
you whether this is something you'd like to use:
http://java.sun.com/docs/books/tutorial/uiswing/start/index.html

hope this helps

brice



From greg at cosc.canterbury.ac.nz  Mon Sep 24 22:15:17 2007
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Tue, 25 Sep 2007 14:15:17 +1200
Subject: ANN: 555-BOOM! version 0.6
Message-ID: <mailman.1034.1190714499.2658.python-announce-list@python.org>

I have released a post-competition version of my PyWeek 5 game competition 
entry, 555-BOOM!.

http://www.cosc.canterbury.ac.nz/greg.ewing/python/PyWeek5/index.html

This version has been tidied up in various ways, and a few more levels added. I 
have made a number of improvements to the level editor; it should be easier and 
less confusing to use now. Documentation for the level editor is included.

What is it?

This is a game involving telephones, relays, rotary switches, and other 
electrical things that make nice whirring and clicking noises. As well as 
challenging yourself to solve the puzzles, you can also use the comprehensive 
built-in level editor to create new puzzles for yourself and others, or just to 
play around and have fun with the parts.

--
Gregory Ewing
greg.ewing at canterbury.ac.nz


From Shawn at Milochik.com  Tue Sep  4 14:19:45 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Tue, 4 Sep 2007 14:19:45 -0400
Subject: [Tutor] Code reading for learning Python
In-Reply-To: <46D61C0A.9090204@tds.net>
References: <86105.56732.qm@web56412.mail.re3.yahoo.com>
	<46D61C0A.9090204@tds.net>
Message-ID: <2dc0c81b0709041119j44dad31fn14b6cf6cdd83e160@mail.gmail.com>

I second the Python Cookbook recommendation.


From jcd at sdf.lonestar.org  Mon Sep 10 22:49:31 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Mon, 10 Sep 2007 22:49:31 -0400
Subject: printing list containing unicode string
In-Reply-To: <1189477580.214510.212420@22g2000hsm.googlegroups.com>
References: <1189432793.383166.156710@d55g2000hsg.googlegroups.com>
	<1189477580.214510.212420@22g2000hsm.googlegroups.com>
Message-ID: <46E6023B.1090909@sdf.lonestar.org>

Xah Lee wrote:
> This post is about some notes and corrections to a online article
> regarding unicod and python.
>
> --------------
>
> by happenstance i was reading:
>
> Unicode HOWTO
> http://www.amk.ca/python/howto/unicode
>
> Here's some problems i see:
>
> ? No conspicuous authorship. (however, oddly, it has a conspicuous
> acknowledgement of names listing.) (This problem is a indirect
> consequence of communism fanatism ushered by OpenSource movement)
> (Originally i was just going to write to the author on some
> corrections.)
>
> ? It's very wasteful of space. In most texts, the majority of the
> code points are less than 127, or less than 255, so a lot of space is
> occupied by zero bytes.
>
> Not true. In Asia, most chars has unicode number above 255. Considered
> globally, *possibly* today there are more computer files in Chinese
> than in all latin-alphabet based lang.
>
That's an interesting point. I'd be interested to see numbers on
that, and how those numbers have changed over the past five years.
Sadly, such data is most likely impossible to obtain.

However, it should be pointed out that most *code*, whether written in
the United States, New Zealand, India, China, or Botswana is written
in English. In part because it has become a standard of sorts, much
as italian was a standard for musical notation, due in part to the
US's former (and perhaps current, but certainly fading) dominance in
the field, and in part to the lack of solid support for unicode among
many programming languages and compilers. Thus the author's bias, while
inaccurate, is still understandable.

> ? Many Internet standards are defined in terms of textual data, and
> can't handle content with embedded zero bytes.
>
> Not sure what he mean by "can't handle content with embedded zero
> bytes". Overall i think this sentence is silly, and he's probably
> thinking in unix/linux.
>
> ? Encodings don't have to handle every possible Unicode
> character, ....
>
> This is inane. A encoding, by definition, turns numbers into binary
> numbers (in our context, it means a encoding handles all unicode chars
> by definition). What he really meant to say is something like this:
> "Practically speaking, most computer languages in western society
> don't need to support unicode with respect to the language's source
> file"
>
> ?
> UTF-8 has several convenient properties:
> 1. It can handle any Unicode code point.
> ...
>
>
> As mentioned before, by definition, any Unicode encoding encodes all
> unicode char set. The mentioning of above as a "convenient property"
> is inane.
>
No, it's not inane. UCS-2, for example, is a fixed width, 2-byte
encoding that can handle any unicode code point up to 0xffff, but
cannot handle the 3 and 4 byte extension sets. UCS-2 was developed
for applications in which having fixed width characters is essential,
but has the limitations of not being able to handle any Unicode code
point. IIRC, when it was developed, it did handle every code point,
and then Unicode grew. There is also a UCS-4 to handle this
limitation. UTF-16 is based on a two-byte unit, but is variable
width, like UTF-8, which makes it flexible enough to handle any code
point, but harder to process, and a bear to seek through to a certain
point.

(I'm politely ignoring your ill-reasoned attacks on non-Microsoft OSes).

Cheers,
Cliff


From eugene.vandenbulke at gmail.com  Sat Sep  8 04:37:51 2007
From: eugene.vandenbulke at gmail.com (EuGeNe Van den Bulke)
Date: Sat, 08 Sep 2007 10:37:51 +0200
Subject: python sqlite THREADSAFE?
Message-ID: <fbtn0r$bol$1@aioe.org>

Hi,

Is the sqlite distributed with Python 2.5 compiled with the 
-DTHREADSAFE=1 flag? My gutt feeling is Windows (yes) MacOS/Linux (no) 
but ...

If it is not on MacOS/Linux, how do I go about replacing the sqlite so 
file with a threadsafe sqlite?

Thanks,

EuGeNe -- http://www.3kwa.com


From stefan.behnel-n05pAM at web.de  Fri Sep 21 08:50:22 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Fri, 21 Sep 2007 14:50:22 +0200
Subject: An Editor that Skips to the End of a Def
In-Reply-To: <YPGIi.54591$YL5.26012@newssvr29.news.prodigy.net>
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk>
	<tfAIi.51111$Um6.44314@newssvr12.news.prodigy.net>
	<YPGIi.54591$YL5.26012@newssvr29.news.prodigy.net>
Message-ID: <46F3BE0E.8090001@web.de>

W. Watson wrote:
> Is vim just an editor or is it capable of running and debugging a
> program, as well?

Depends on how you define an editor. If you take Emacs as example for an
editor, then, no, it's not an editor.

BTW:

>>> (It even gives useful advice on top-posting if you use it as a news
>>> client :/)

Stefan


From linuxprog at gmail.com  Mon Sep 24 05:42:23 2007
From: linuxprog at gmail.com (linuxprog)
Date: Mon, 24 Sep 2007 09:42:23 +0000
Subject: SOAPpy Error
Message-ID: <46F7867F.3090607@gmail.com>

hi all

i'm building a webservice client with soappy

when i send some informations it's returns an error
here is the informations that generates the error
    var = SOAPpy.structType()
    var._addItem("code", u"XysZjd")
    var._addItem("value", 1)
when i send the var variable SOAPpy prints this

  File "C:\Python23\lib\site-packages\SOAPpy\Client.py", line 473, in 
__call__
    return self.__r_call(*args, **kw)
  File "C:\Python23\lib\site-packages\SOAPpy\Client.py", line 495, in 
__r_call
    self.__hd, self.__ma)
  File "C:\Python23\lib\site-packages\SOAPpy\Client.py", line 366, in __call
    config = self.config)
  File "C:\Python23\lib\site-packages\SOAPpy\Client.py", line 228, in call
    data = r.getfile().read()
AttributeError: 'NoneType' object has no attribute 'read'

when i have activate debug , the debug mode shows :
code :  -1
msg : 
headers : None

it should prints some thing like this if all goes well :
code :  200
msg :  OK
headers : Date: Mon, 24 Sep 2007 09:08:45 GMT
Server: Apache/2.2.3 (Debian) PHP/5.2.0-8+etch7
X-Powered-By: PHP/5.2.0-8+etch7
Content-Length: 2116
Connection: close
Content-Type: text/xml; charset=utf-8

wha's wrong ?

Thanks


From rcdailey at gmail.com  Mon Sep 24 20:37:20 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Mon, 24 Sep 2007 19:37:20 -0500
Subject: Regular Expressions: Can't quite figure this problem out
Message-ID: <496954360709241737o6e42e7efk29886b5631f6ca2e@mail.gmail.com>

Hi,

I'm attempting to create a regular expression that removes redundancy in
empty XML elements. For example:

<root></root>

The regular expression would convert the XML above into:

<root/>

And another complex example:

<root><frame type="image"><action></action></frame></root>

would be:

<root><frame type="image"><action/></frame></root>


So far I've been unsuccessful in creating a regular expression to do this.
Below are outlined various guarantees:

- The XML to be parsed shall have NO comments in it
- The XML to be parsed shall have NO whitespace (spaces, tabs, carriage
returns, etc) between elements. The examples above represent what this
means.

Thanks.
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From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun Sep  2 04:46:37 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 02 Sep 2007 10:46:37 +0200
Subject: How best to dynamically define methods (and functions)?
References: <mailman.288.1188704597.28954.python-list@python.org>
Message-ID: <5jvbjaF1ct31U1@mid.individual.net>

Kenneth McDonald wrote:

> I can see an obvious but hacky way to define a Python function at
> runtime. 

What way is this? All Python function definitions in your code are
executed at runtime.

> In case it's of interest in the context of the question, I need to
> define a largish set of functions (and similar methods) that
> define a XML-type markup language. Most of these functions will
> just be of the form
> 
> def fun(...):
>     return Node('fun', ...)
> 
> so it'd definitely be nice to just create most of them
> automatically, and only do the special cases by hand.

This looks cumbersome to me. If you reworked the interface (perhaps
using dicts or a generic function) it might get clearer.

Regards,


Bj?rn

-- 
BOFH excuse #241:

_Rosin_ core solder? But...



From timaranz at gmail.com  Wed Sep 26 01:07:32 2007
From: timaranz at gmail.com (timaranz at gmail.com)
Date: Tue, 25 Sep 2007 22:07:32 -0700
Subject: Missing documentation for ElementTree?
In-Reply-To: <mailman.1080.1190779234.2658.python-list@python.org>
References: <496954360709251539y2511a1cbnd25c6d3a0d368d2a@mail.gmail.com>
	<mailman.1080.1190779234.2658.python-list@python.org>
Message-ID: <1190783252.777675.44180@r29g2000hsg.googlegroups.com>

On Sep 26, 4:00 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Tue, 25 Sep 2007 19:39:33 -0300, Robert Dailey <rcdai... at gmail.com>
> escribi?:
>
> > for the _ElementInterface class, there is no documentation for most of
> > the
> > members of this class such as .tail and .text. There's a brief
> > description
> > of these things on the front page of the ElementTree docs but nothing
> > helpful. I have no idea what Tail is vs Text and I wanted to figure this
> > out
> > myself, however I don't think I can now. Anyone know if I'm just missing
> > something in the documentation or if it really isn't in there?
>
> Start here:http://www.effbot.org/zone/element-index.htm
>
> --
> Gabriel Genellina

Check out the development version of the documentation
http://docs.python.org/dev/library/xml.etree.elementtree.html#module-xml.etree.ElementTree



From gagsl-py2 at yahoo.com.ar  Mon Sep 24 22:36:23 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 24 Sep 2007 23:36:23 -0300
Subject: TRying to import files from my folder not pythons lib folder
References: <1190395964.541835.114350@50g2000hsm.googlegroups.com>
	<1190396569.732154.234270@r29g2000hsg.googlegroups.com>
	<mailman.883.1190399436.2658.python-list@python.org>
	<1190595699.093793.100960@w3g2000hsg.googlegroups.com>
	<mailman.969.1190620981.2658.python-list@python.org>
	<1190684198.266529.85020@y42g2000hsy.googlegroups.com>
Message-ID: <op.ty6uuxlux6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 24 Sep 2007 22:36:38 -0300, Luis M. Gonz?lez <luismgz at gmail.com>  
escribi?:

> I solved the problem!
> You were right. It seems there was a module that was causing problems,
> although I don't know which one...
> I just moved all the .py files on my desktop to a new folder, and
> everything worked just fine.
> The list of .py files in my desktop were:
>
> 'code.py', 'code2.py', 'code22.py', 'code3.py', 'draft.py',
> 'flups.py', 'forma.py', 'fx.py', 'nuevo.py', 'nwind', 'ops',
> 'pages.py', 'qqq.py', 'sample.py', 'ses.py', 'sess.py', 'sess2.py',
> 'soup.py', 'style.py', 'test_session.py', 'up.py', 'up2.py', 'ww.py',
> 'xx.pyw', 'xx.rsrc.py', 'xxxx.py'
>
> Any idea of which one was causing trouble?

Possibly code.py, it's a standard module  
<http://docs.python.org/lib/module-code.html>

> Gracias, che!

De nada loco!

-- 
Gabriel Genellina



From raychorn at hotmail.com  Sat Sep 22 16:00:27 2007
From: raychorn at hotmail.com (Python Maniac)
Date: Sat, 22 Sep 2007 13:00:27 -0700
Subject: I could use some help making this Python code run faster using
	only Python code.
In-Reply-To: <5ljrklF8gic1U3@mid.uni-berlin.de>
References: <1190325588.608625.259800@q3g2000prf.googlegroups.com>
	<1190328413.226577.206740@k79g2000hse.googlegroups.com>
	<1190330015.131971.265680@y42g2000hsy.googlegroups.com>
	<1190357165.381313.197910@19g2000hsx.googlegroups.com>
	<Xns99B25B0334892duncanbooth@127.0.0.1>
	<1190394011.148384.106280@q3g2000prf.googlegroups.com>
	<mailman.897.1190412168.2658.python-list@python.org>
	<1190417120.723579.267560@22g2000hsm.googlegroups.com>
	<5ljrklF8gic1U3@mid.uni-berlin.de>
Message-ID: <1190491227.688310.247030@w3g2000hsg.googlegroups.com>

On Sep 21, 11:39 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Fri, 21 Sep 2007 16:25:20 -0700, Python Maniac wrote:
> > On Sep 21, 3:02 pm, "Matt McCredie" <mccre... at gmail.com> wrote:
>
> >> Isn't D compiled to machine code? I would expect it to win hands down.
> >> That is, unless it is horribly unoptimized.
>
> > Well D code is compiled into machine code that runs via a VM.
>
> About which D are we talking here?  Not digital mars' successor to C++,
> right!?
>
> Ciao,
>         Marc 'BlackJack' Rintsch

Yes, Digital Mars D is what I was referring to and yes I know D is not
as efficient as C++.  If I knew of a good C++ compiler that is not
from Microsoft that works natively with Windows I would be happy to
consider using it but alas the only one I have found so far is from
Digital Mars.  Digital Mars D has nice integration with Python via pyd
and this is another plus, in my mind.




From steve at holdenweb.com  Fri Sep 28 18:16:51 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 28 Sep 2007 18:16:51 -0400
Subject: Python 3.0 migration plans?
In-Reply-To: <1191013033.145194.193040@50g2000hsm.googlegroups.com>
References: <mailman.1195.1190936289.2658.python-list@python.org>	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>	<%q0Li.725$ih1.539@nlpi068.nbdc.sbc.com>	<1i555ag.9ez4uvf4583jN%aleax@mac.com>	<ns9Li.1172$4V6.1092@newssvr14.news.prodigy.net>
	<1191013033.145194.193040@50g2000hsm.googlegroups.com>
Message-ID: <46FD7D53.1060403@holdenweb.com>

Kay Schluehr wrote:
> On 28 Sep., 17:53, John Nagle <na... at animats.com> wrote:
>> Alex Martelli wrote:
>>> John Nagle <na... at animats.com> wrote:
>>>> TheFlyingDutchman wrote:
>>>>> It seems that Python 3 is more significant for what it removes than
>>>>> what it adds.
>>>>> What are the additions that people find the most compelling?
>>>>     I'd rather see Python 2.5 finished, so it just works.
>>> And I'd rather see peace on Earth and goodwill among men than _either_
>>> Python 3 or your cherished "finished" 2.5 -- the comparison and implied
>>> tradeoff make about as much sense as yours.
>>      Insofar as Python has an organization, it's not adequately managing
>> extension modules.  Each extension module has its own infrastructure,
>> with its own build procedures, its own bug list, and its own maintainers.
>> There's not even an archive.  Unlike CPAN, Cheese Shop is just a directory of
>> URLs.
> 
> John, can't you please piss off?
> 
> Thanks, Kay
> 
Oops! Let's get back to goodwill and peace to all men, can we - 
including {Flying Dutch,wo}men?

crabbi-ly y'rs  - steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From seanttierney at gmail.com  Fri Sep 21 19:53:41 2007
From: seanttierney at gmail.com (Sean Tierney)
Date: Fri, 21 Sep 2007 16:53:41 -0700
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <54e1e4bc0709211647v10140c13y90c9bd68007c8398@mail.gmail.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<mailman.900.1190414696.2658.python-list@python.org>
	<1190415741.380795.259050@y42g2000hsy.googlegroups.com>
	<54e1e4bc0709211647v10140c13y90c9bd68007c8398@mail.gmail.com>
Message-ID: <54e1e4bc0709211653r2720b00cr67ab12223ce0fac2@mail.gmail.com>

On 9/21/07, Sean Tierney <seanttierney at gmail.com> wrote:
> Just tell him that "functions are like all  other variables and can
> therefore be passed by other functions or returned by other functions.
> "
>
> If your friend understands variables and functions and he can't make
> the "leap" (and assuming you're right, of course) then your friend
> doesn't [might not] understand variables and functions [and he might need patience b/c this stuff is hard and not everyone is as smart as everyone else].
>
> Happy Friday.
>
> Sean [moderately overweight, self-admitted (very) slow learner.]
>
> On 9/21/07, Cristian <super.sgt.pepper at gmail.com> wrote:
> > On Sep 21, 3:44 pm, Ron Adam <r... at ronadam.com> wrote:
> >
> > > I think key may be to discuss names and name binding with your friend.  How
> > > a name is not the object it self, like a variable is in other languages.
> > > For example show him how an object can have more than one name.  And discus
> > > how names can be bound to nearly anything, including classes and functions.
> >
> > I could discuss name binding but it would be great if Python said this
> > itself. After all, you can even bind a module with the foo = bar
> > syntax by using __import__ function. If function definitions followed
> > the same pattern, I think a beginner would subconsciously (maybe even
> > consciously) realize that function names are just like everything
> > else. Actually, this would be helpful for many people. If you come
> > from a language like Java you're used to thinking of attributes and
> > methods as living in different namespaces. I think a new syntax will
> > encourage seasoned programmers think in a more Pythonic way.
> >
> > Python has done a very good job in easing people into programming. My
> > friend doesn't come to me very often because the syntax is clear and
> > simple and the builtin datatypes allow you to do so much. My goal is
> > that I would never have to explain to him about name binding; that
> > he'd pick it up by learning the language on his own. He's learned
> > lists, dictionaries and even some OOP without me. I don't think name
> > binding would be a stretch.
> >
> > > You could also discus factory functions with him.  Once he gets that a
> > > function can return another function, then it won't be so much of a leap
> > > for a function to take a function as an argument.
> >
> > I think this isn't the most intuitive way of approaching first order
> > functions. It's true that if a function can return another function
> > then a function must be first order (i.e., it's just like any other
> > variable), but that seems almost backwards to me. I think it would
> > make more sense to have beginners _know_ that functions are like all
>
> > other variables and can therefore be passed by other functions or
> > returned by other functions. That I think would be better accomplished
> > if they define functions the same way you would define other variables
> > that you know can be passed and returned.
> >
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>
>
> --
> Sean Tierney
>


-- 
Sean Tierney


From kyosohma at gmail.com  Sat Sep 15 15:48:42 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Sat, 15 Sep 2007 19:48:42 -0000
Subject: (wxPython) wx.ProgressDialog - how to cancel out of?
In-Reply-To: <rvrme3tb8snr5rnqgf5p8g1g4ponp0nbfj@4ax.com>
References: <rvrme3tb8snr5rnqgf5p8g1g4ponp0nbfj@4ax.com>
Message-ID: <1189885722.198714.266810@o80g2000hse.googlegroups.com>

On Sep 15, 12:57 am, Terry Carroll <carr... at nospam-tjc.com> wrote:
> I'm trying to use wx.ProgressBar, and the cancel button is not
> responding.
>
> Here is a simple program that exhibits the problem:
>
> #########################################################
> import  wx
> import time
>
> max = 10
> app = wx.PySimpleApp()
> dlg = wx.ProgressDialog("Progress dialog example",
>                        "variables to be shown here",
>                        maximum = max,
>                        style = wx.PD_CAN_ABORT
>                         | wx.PD_CAN_SKIP
>                         #| wx.PD_APP_MODAL
>                         | wx.PD_ELAPSED_TIME
>                         | wx.PD_ESTIMATED_TIME
>                         | wx.PD_REMAINING_TIME
>                         )
>
> keepGoing = True
> skip = False
> count = 0
>
> while keepGoing and count < max:
>     count += 1
>     wx.MilliSleep(1000)
>     #time.sleep(1)
>     newtext = "(before) count: %s, keepGoing: %s, skip: %s " % \
>               (count, keepGoing, skip)
>     print newtext
>     (keepGoing, skip) = dlg.Update(count, newtext)
>     newtext = "(after) count: %s, keepGoing: %s, skip: %s " % \
>               (count, keepGoing, skip)
>     print newtext
> dlg.Destroy()
> #########################################################
>
> The dialog looks right when this runs, but....
>
> What's right: I get a progress bar;  it includes "Skip" and "Cancel"
> buttons; it shows 10 seconds of progress, and updates once per second
> with the variables' values on each iteration.
>
> What's wrong is that I can't get clicking on the "Skip" or "Cancel"
> buttons to have any effect.  Instead, as soon as the dialog displays,
> I get an hourglass, and it doesn't matter what I click on.  Here's
> what the print statements display, consistently, regardless of what I
> try to click or whether I click nothing at all:
>
> I:\python>test1.py
> (before) count: 1, keepGoing: True, skip: False
> (after) count: 1, keepGoing: True, skip: False
> (before) count: 2, keepGoing: True, skip: False
> (after) count: 2, keepGoing: True, skip: True
> (before) count: 3, keepGoing: True, skip: True
> (after) count: 3, keepGoing: True, skip: True
> (before) count: 4, keepGoing: True, skip: True
> (after) count: 4, keepGoing: True, skip: True
> (before) count: 5, keepGoing: True, skip: True
> (after) count: 5, keepGoing: True, skip: True
> (before) count: 6, keepGoing: True, skip: True
> (after) count: 6, keepGoing: True, skip: True
> (before) count: 7, keepGoing: True, skip: True
> (after) count: 7, keepGoing: True, skip: True
> (before) count: 8, keepGoing: True, skip: True
> (after) count: 8, keepGoing: True, skip: True
> (before) count: 9, keepGoing: True, skip: True
> (after) count: 9, keepGoing: True, skip: True
> (before) count: 10, keepGoing: True, skip: True
> (after) count: 10, keepGoing: True, skip: True
>
> Two oddities here:
>
> 1) As I read the docs, the keepGoing variable should be set to True,
> unless I click on "Cancel," in which case it should be set to False
> (which would end the loop).  That doesn't happen.  This is really what
> I'm most concerned here with.
>
> 2) The variable "skip: set to False on the first iteration, and then
> set to True on subsequent iterations?  Note that this happens even if
> no buttons are selected.  This is just a weirdness to me, and not my
> main concern, but I thought I'd mention it in case it's relevant.
>
> You can see some variations in the commented-out code that I tried;
> they did not help.
>
> Relevant software and releases:
>
> OS: Windows XP Home Edition, Version 2002, SP2
> Python: ActivePython 2.5.0.0
> wxPython: 2.8.1.1 (msw-unicode)
>
> Any help appreciated.

I'm not seeing the error either. The code looks very similar to the
example in the demo. Maybe you can look at it and see the difference?
The only thing I see is that the demo embeds the ProgressDialog into a
Panel object.

You should probably post this to the wxPython mailing group:
http://wxpython.org/maillist.php

Mike



From lasses_weil at klapptsowieso.net  Sun Sep  2 15:00:45 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Sun, 02 Sep 2007 21:00:45 +0200
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
In-Reply-To: <46DB04DD.80801@v.loewis.de>
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
	<1188735642.391419.103650@19g2000hsx.googlegroups.com>
	<1188740716.423349.304370@y42g2000hsy.googlegroups.com>
	<1188743299.664137.194760@d55g2000hsg.googlegroups.com>
	<46daeaec$0$19889$426a74cc@news.free.fr>
	<46DB04DD.80801@v.loewis.de>
Message-ID: <46db085d$0$16113$9b4e6d93@newsspool1.arcor-online.net>

Martin v. L?wis wrote:
>>> (2) it is a interpretation language
>> Not quite. It's compiled to byte-code - just like Java (would you call
>> Java an 'interpreted language' ?)
> 
> Python is not implemented like Java. In Java (at least in HotSpot),
> the byte code is further compiled to machine code before execution;
> in Python, the byte code is interpreted.
> 
OK, good. Naive question now comming to mind: Why doesn't Python do the 
latter as well?

/W


From harry.g.george at boeing.com  Thu Sep  6 01:47:31 2007
From: harry.g.george at boeing.com (Harry George)
Date: Thu, 6 Sep 2007 05:47:31 GMT
Subject: SSL Issue
References: <mailman.114.1189025717.2658.python-list@python.org>
Message-ID: <xqxbqcge45o.fsf@cola3.ca.boeing.com>

Jurian Botha <jurian at oco.co.za> writes:

> Sorry if this is a real dumb question, but I'm totally stumped.
>
> I'm trying to connect to a https url in order to do some xml-rpc method
> calls, but I'm getting the following error:
>
> Error Type: sslerror
> Error Value: (6, 'TLS/SSL connection has been closed')
>
> What could be causing this error, any clues would be greatly appreciated.
>
> Thanks
> -- 
> View this message in context: http://www.nabble.com/SSL-Issue-tf4388062.html#a12510772
> Sent from the Python - python-list mailing list archive at Nabble.com.
>

I don't have a complete story, but here are some hints:

1. The message is from:
http://www.openssl.org/docs/ssl/SSL_get_error.html
(see "ZERO RETURN")
probably as filtered by 
PyOpenSSL, which has its own issues:
http://mail.python.org/pipermail/python-dev/2007-August/074322.html

2. Chances are that your certificates are out of whack, or you are
misusing the SSL context parameters, or are not telling the HTTP
Connection object about the SSL Connection properly.

3. Debugging at the python layer is easier (put print statements in
M2Crypto's SSL/Context and SSL/Connection) but if necessary, dive into
openssl:
http://www.mail-archive.com/openssl-users at openssl.org/msg49287.html

4. You can check for the "hello" handshake using WireShark.

5. I haven't found a tutorial for full Python client/server over HTTPS
with verification of both client and server certificates.  If that is
where you are going, let me know what works.




-- 
Harry George
PLM Engineering Architecture


From mail at microcorp.co.za  Tue Sep 25 02:34:21 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 25 Sep 2007 08:34:21 +0200
Subject: Google and Python
References: <1190228512.627109.308910@n39g2000hsh.googlegroups.com><ufadnRC5BPZm6GzbnZ2dnUVZ_jOdnZ2d@comcast.com><1190231094.276099.136250@22g2000hsm.googlegroups.com><mailman.781.1190232163.2658.python-list@python.org><1190235678.019823.315850@o80g2000hse.googlegroups.com><mailman.887.1190402873.2658.python-list@python.org><7xejgr68pm.fsf@ruckus.brouhaha.com>
	<slrnffetai.ijq.nick@irishsea.home.craig-wood.com>
Message-ID: <000b01c7ff46$5e33dfc0$03000080@hendrik>

"Nick Craig-Wood" <ni....d.com> wrote:

> Passing file descriptors between processes is one of those things I've
> always meant to have a go with, but the amount of code (in Advanced
> Programming in the Unix Environment) needed to implement it is rather
> disconcerting!  A python module to do it would be great!

I must be missing something here.

What is the advantage of passing the open file rather than just the
fully qualified file name and having the other process open the
file itself?

I would tend to not go this route, but would opt for one "file owner"
process and use a message based protocol if heavy sharing is envisaged.
It feels "more right" to me than to have different processes read and write 
to the same thing.  I can imagine big Dragons with sharp teeth...

- Hendrik



From fakeaddress at nowhere.org  Wed Sep 26 23:24:30 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Thu, 27 Sep 2007 03:24:30 GMT
Subject: database persistence with mysql, sqlite
In-Reply-To: <fdd5dg$o0o$4@lust.ihug.co.nz>
References: <1190502677.970811.181100@22g2000hsm.googlegroups.com>
	<mailman.993.1190636458.2658.python-list@python.org>
	<1190650748.590245.221490@n39g2000hsh.googlegroups.com>
	<HSnKi.35782$RX.34622@newssvr11.news.prodigy.net>
	<fdd5dg$o0o$4@lust.ihug.co.nz>
Message-ID: <NnFKi.2654$6p6.417@newssvr25.news.prodigy.net>

Lawrence D'Oliveiro wrote:
> In Bryan Olson wrote:
> 
>> coldpizza wrote:
>>> It turned out that the method above ('SELECT * FROM TABLE LIMIT L1,
>>> L2') works ok both with mysql and sqlite3, therefore I have decided to
>>> stick with it until I find something better. With Sqlite3 you are
>>> supposed to use LIMIT 10 OFFSET NN, but it also apparently supports
>>> the mysql syntax (LIMIT NN, 10) for compatibility reasons.

>> A more reliable form is along the lines:
>>
>>      SELECT keyfield, stuff
>>      FROM table
>>      WHERE keyfield > ?
>>      ORDER BY keyfield
>>      LIMIT 10
>>
>> With the right index, it's efficient.
> 
> But that involves keeping track of the right starting keyfield value for the
> next batch of records, which is complicated and nontrivial.

I think you missed the idea here. Recall that we return a
web page showing 10 records and a 'Next' link. We write the
link so that the browser will send back the parameter we
need. If the largest keyfield value on the page is
"Two-Sheds" the link might read:

<A HREF="http://rfh.uk/tablnext.cgi?start=Two-Sheds">Next</A>

The solution is stateless. There's no "keeping track" on the
server side. When we respond to a request, we neither look up
a previous request nor store anything for a future response.


> Simpler to let
> the DBMS do the work for you.

Keeping a cursor with pending data across HTTP requests is
a world of hurt.


-- 
--Bryan


From grante at visi.com  Sat Sep 22 01:19:42 2007
From: grante at visi.com (Grant Edwards)
Date: Sat, 22 Sep 2007 05:19:42 -0000
Subject: Getting rid of bitwise operators in Python 3?
References: <46f49740$0$32514$4c368faf@roadrunner.com>
Message-ID: <13f99fediasg3ae@corp.supernews.com>

On 2007-09-22, Carl Banks <pavlovevidence at gmail.com> wrote:

> Anyone with me here?  (I know the deadline for P3 PEPs has passed; this 
> is just talk.)

Not me.

> Not many people are bit-fiddling these days.

I do.

> One of the main uses of bit fields is flags, but that's not
> often done in Python because of keyword arguments and dicts,
> which are lot more versatile.  Another major use, talking to
> hardware, is not something oft done in Python either.

I do it all the time.

Bit fiddling is also required for implementing communications
prototocols.

> It seems like this occasional usage wouldn't justify having built-in 
> operators on its own.  And with the int/long unification, it makes a bit 
> less sense to think of integers as a bit field.  Python has these 
> operators because of its heritage, but Python continues to move away from 
> the bad habits of its ancestors (integer division and so on), and I 
> wonder if this isn't another one.
>
> Of course I'm not suggesting to get rid of bitwise operations altogether; 
> just make them builtin functions: "x & 1" becomes "bitwise_and(x,1)" and 
> so on.
>
> Is it worth it to make such a change?  It would remove a lot of operators 
> (11 by my count), vastly simplifying syntax,  Which, IMHO, is no small 
> thing.

If you don't want to use the bitwise operations, then ignore
them.  Presto!  Simpler syntax.

> Obviously, how widespread their usage is would matter.  But keep in mind 
> it would also be easy to convert the code automatically, because the 
> Python parser could reliably find all bitwise operations reliably.

The resulting code wold be fugly.

-- 
Grant



From jura.grozni at gmail.com  Wed Sep 19 15:33:08 2007
From: jura.grozni at gmail.com (azrael)
Date: Wed, 19 Sep 2007 12:33:08 -0700
Subject: Help for Otsu implementation from C
In-Reply-To: <fcr2o9$l32$03$1@news.t-online.com>
References: <1190201086.468348.274850@g4g2000hsf.googlegroups.com>
	<fcr2o9$l32$03$1@news.t-online.com>
Message-ID: <1190230388.764546.114690@57g2000hsv.googlegroups.com>

I know. The translation is not so important to me, because this is
going to just a little function that is working in the last step of
the whole proces. The whole implementation wont be published and has
just the meaning to implement a first alpha version of a face
recognition system. It is nearly finished, and this is the only
function I am missing. For this purpose I need it to work "EXACTLY".

I know that it doesnt look pythonic. After I know that it works
correctly, I am going to write a total Rewrite for the Beta Version.



On Sep 19, 1:55 pm, Peter Otten <__pete... at web.de> wrote:
> azrael wrote:
> > Can somone look at this
> > def otsu(hi):
> >     fmax=-1.0
> >     border=len(hi)
> >     for i in range(border):
> >         if hi[i]!=0:break
> >     for j in range(border-1,0-1,-1):
> >         if hi[j] != 0:break
> >     s = sum([k*hi[k] for k in range(border)]) n = sum(hi) #
> >     product(im.size)
> >     n1=n2=csum=0.0
> >     for k in range(i,j):
> >         n1 += hi[k]
> >         n2  = n - n1
> >         csum+= k * hi[k]
> >         m1 = csum/ n1
> >         m2 = (s - csum)/n2
>
> As I said in my previous post, try replacing this line
>
> >         sb = n1 * n2 * (m2 - m1)
>
> with the original
>
>           sb = n1 * n2 * (m1 - m2) * (m1 - m2)
>
> that has been commented out.
>
> >         if sb > fmax:
> >             fmax = sb
> >             V=k+1
> >     print V
> > I try to implement it from C from this location.
>
> Personally, I would start with a literal translation and not try to
> improve it until it works.
>
> Peter




From list-ener at strank.info  Thu Sep  6 07:37:50 2007
From: list-ener at strank.info (Stefan Rank)
Date: Thu, 06 Sep 2007 13:37:50 +0200
Subject: Nudge needed for rst to html
In-Reply-To: <46DFE179.40003@timgolden.me.uk>
References: <46DFE179.40003@timgolden.me.uk>
Message-ID: <46DFE68E.2080906@strank.info>

on 06.09.2007 13:16 Tim Golden said the following:
> I'm a bit embarrassed about this, but I've scoured
> the docutils docs and I can't seem to work out how
> to take a block of ReStructuredText and output a
> raw HTML fragment, ideally without a surrounding
> document or embedded/linked css etc. (I'm trying
> to allow rst in our helpdesk system which can render
> nicely on the web version and be readable in text).
> 
> I thought that:
> 
> <code>
> import docutils.core
> 
> html = docutils.core.publish_string ("Hello, world!", writer_name="html")
> 
> </code>
> 
> would do the trick, but that produces an entire document with
> an embedded style block.

try this::

   import docutils.core

   parts = docutils.core.publish_parts("Hello!", writer_name="html")
   html = parts['body']

tfm: http://docutils.sourceforge.net/docs/api/publisher.html

cheers,
stefan



From paul at boddie.org.uk  Wed Sep 26 08:13:56 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Wed, 26 Sep 2007 05:13:56 -0700
Subject: setuptools without unexpected downloads
In-Reply-To: <5luv0iFaai82U1@mid.uni-berlin.de>
References: <87ejgmklep.fsf@benfinney.id.au><874phhlupi.fsf@benfinney.id.au>
	<5lumarFae888U1@mid.uni-berlin.de>
	<1190802526.695391.326220@n39g2000hsh.googlegroups.com>
	<5lurorFa92euU1@mid.uni-berlin.de>
	<1190805012.275901.227570@57g2000hsv.googlegroups.com>
	<5luv0iFaai82U1@mid.uni-berlin.de>
Message-ID: <1190808836.056298.232640@57g2000hsv.googlegroups.com>

On 26 Sep, 13:44, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>
> Do I understand that correctly that essentially you're saying: if you want
> your software released for a certain distro, package it up for it the way
> it's supposed to be? I can understand that and said so myself - but then,
> the whole setuptools-debate has come to an end.

Yes, my preference is to install software as native packages, although
I'm generally spoilt by the selection of packages available and the
availability of packaging for current and previous versions of a lot
of Python packages for my system. One problem with promoting system/
native packages is that it can be difficult for people not using the
target platform to actually build the packages themselves, thus
requiring some kind of package maintainer role to be filled by another
person, but generally any demand on a given system for a package leads
to that role being filled by a community member fairly quickly. And
there are some existing semi-automated solutions, too, such as stdeb
and the distutils bdist_rpm option.

Paul

P.S. Of course, the package maintainer problem manifests itself most
prominently on Windows where you often see people asking for pre-built
packages or installers.



From bj_666 at gmx.net  Sun Sep 16 02:24:09 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 16 Sep 2007 06:24:09 GMT
Subject: Needless copying in iterations?
References: <fchk59$mm3$1@daisy.noc.ucla.edu>
	<5l3ab6F5v20uU3@mid.uni-berlin.de> <13eourdrne86e61@corp.supernews.com>
Message-ID: <5l40g9F655kfU1@mid.uni-berlin.de>

On Sun, 16 Sep 2007 00:40:13 +0000, Steven D'Aprano wrote:

> On Sun, 16 Sep 2007 00:05:58 +0000, Marc 'BlackJack' Rintsch wrote:
> 
> In *general* the compiler can't tell, but in specific cases it could. A 
> (hypothetical) optimizing compiler would tell the difference between:
> 
> 
> for item in alist[1:5]:
>     print item # no possible side-effects

To expand on what Ben said:  After conversion to `str` the result is then
given to `sys.stdout.write()` and of course `sys.stdout` could be another
object that changes `alist`.

> for item in alist[1:5]:
>     alist.append(item) # side-effects DON'T matter

Side effect do matter here, even in not so pathological cases.  There are
cases where you get a different result whether you copy or not even with
plain vanilla `list`\s:

In [153]: alist = [1, 2, 3]

In [154]: for item in alist[1:5]:
   .....:     alist.append(item)
   .....:

In [155]: alist
Out[155]: [1, 2, 3, 2, 3]

In [156]: alist = [1, 2, 3]

In [157]: for item in islice(alist, 1, 5):
   .....:     alist.append(item)
   .....:

In [158]: alist
Out[158]: [1, 2, 3, 2, 3, 2, 3]

Ciao,
	Marc 'BlackJack' Rintsch


From dohertywa at gmail.com  Mon Sep 17 16:12:18 2007
From: dohertywa at gmail.com (dohertywa)
Date: Mon, 17 Sep 2007 13:12:18 -0700
Subject: pattern combinations
In-Reply-To: <mailman.667.1190056268.2658.python-list@python.org>
References: <d6a0d8f10709171204v5a8b0ff5haab94b80e2c28e1@mail.gmail.com>
	<mailman.667.1190056268.2658.python-list@python.org>
Message-ID: <1190059938.527265.292000@57g2000hsv.googlegroups.com>

On Sep 17, 3:11 pm, "Shawn Milochik" <Sh... at Milochik.com> wrote:
> On 9/17/07, dorje tarap <dorjeta... at googlemail.com> wrote:
>
>
>
> > Hi all,
>
> >  Given some patterns such as "...t...s." I need to make all possible
> > combinations given a separate list for each position. The length of the
> > pattern is fixed to 9, so thankfully that reduces a bit of the complexity.
>
> >  For example I have the following:
>
> >  pos1 = ['a',' t']
> >  pos2 = ['r', 's']
> >  pos3 = ['n', 'f']
>
> >  So if the pattern contains a '.' character at position 1 it could be 'a' or
> > 't'. For the pattern '.s.' (length of 3 as example) all combinations would
> > be:
>
> >  asn
> >  asf
> >  tsn
> >  tsf
>
> >  Thanks
> > --
> >http://mail.python.org/mailman/listinfo/python-list
>
> Sounds like homework to me.

Checkout http://probstat.sf.net/ it will sort you out quick.



From ricaraoz at gmail.com  Fri Sep  7 13:59:12 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Fri, 07 Sep 2007 14:59:12 -0300
Subject: Finding specific date ranges
In-Reply-To: <46E02369.6020504@timgolden.me.uk>
References: <1189090603.285778.282060@g4g2000hsf.googlegroups.com>
	<46E02369.6020504@timgolden.me.uk>
Message-ID: <46E19170.4020409@bigfoot.com>

Tim Golden wrote:
> kyosohma at gmail.com wrote:
>> Hi,
>>
>> I am working on a timesheet application in which I need to to find the
>> first pay period in a month that is entirely contained in that month
>> to calculate vacation time. Below are some example date ranges:
>>
>>
>> December 31, 2006    January 13, 2007 # doesn't earn
>> January 14, 2007	January 27, 2007 # does earn
>> January 28, 2007	February 10, 2007 # doesn't
>> February 11, 2007	February 24, 2007 # does
>>

What about (untested) :
import datetime

def itEarns(fromDate, toDate) :
    return (fromDate.year == toDate.year and fromDate.month == toDate.month)

periods = [
    (datetime.date(2006, 12, 31), datetime.date(2007, 1, 13)),
    (datetime.date(2007, 1, 14), datetime.date(2007, 1, 27)),
    (datetime.date(2007, 1, 28), datetime.date(2007, 2, 10)),
    (datetime.date(2007, 2, 11), datetime.date(2007, 2, 24))
]

candidatePeriods = [(frm, to) for frm, to in periods if itEarns(frm, to)]

??

>>
>> So far, the best approach I've come up with is to create a list of
>> tuples that contain the pay period date ranges for the year and
>> iterate through the tuples looking for the first occurrence of the
>> month names matching. Then I'd add that date range to a separate list
>> and somehow ignore any other matches in that month. This seems like a
>> hack. Does anyone have a better idea?
> 
> 
> Well, I can come up with a solution which basically reflects the
> way I'd do it in SQL (since this kind of thing is my bread-and-butter
> there) but I'm not convinced it's really any better than your proposal.
> However, for the purposes of illustration:
> 
> <code>
> import calendar
> import datetime
> 
> YEAR = 2007
> 
> months = [
>    (datetime.date (YEAR, n, 1), datetime.date (YEAR, n, calendar.monthrange (YEAR, n)[1]))
>    for n in range (1, 13)
> ]
> 
> periods = [
>    (datetime.date(2006, 12, 31), datetime.date(2007, 1, 13)),
>    (datetime.date(2007, 1, 14), datetime.date(2007, 1, 27)),
>    (datetime.date(2007, 1, 28), datetime.date(2007, 2, 10)),
>    (datetime.date(2007, 2, 11), datetime.date(2007, 2, 24))
> ]
> 
> for m in months:
>    candidate_periods = [p for p in periods if m[0] <= p[0] and p[1] <= m[1]]
>    if candidate_periods:
>      print m[0], "=>", min (candidate_periods)
>    else:
>      print m[0], "=>", "no period matches"
> 
> </code>
> 
> TJG




From babycode at gmail.com  Thu Sep 20 10:29:00 2007
From: babycode at gmail.com (babycode at gmail.com)
Date: Thu, 20 Sep 2007 07:29:00 -0700
Subject: unittest tutorial
In-Reply-To: <fctj6d$4gk$1@ss408.t-com.hr>
References: <fctj6d$4gk$1@ss408.t-com.hr>
Message-ID: <1190298540.618701.221870@k79g2000hse.googlegroups.com>

On Sep 20, 6:48 am, Gigs_ <g... at hi.t-com.hr> wrote:
> does anyone know some good tutorial for unittest? (with examples how unit work)?
>
> thank you

http://www.onlamp.com/pub/a/python/2005/02/03/tdd_pyunit2.html



From byte8bits at gmail.com  Tue Sep 25 13:41:56 2007
From: byte8bits at gmail.com (brad)
Date: Tue, 25 Sep 2007 13:41:56 -0400
Subject: Script to extract text from PDF files
Message-ID: <fdbh95$smc$1@solaris.cc.vt.edu>

I have a very crude Python script that extracts text from some (and I 
emphasize some) PDF documents. On many PDF docs, I cannot extract text, 
but this is because I'm doing something wrong. The PDF spec is large and 
complex and there are various ways in which to store and encode text. I 
wanted to post here and ask if anyone is interested in helping make the 
script better which means it should accurately extract text from most 
any pdf file... not just some.

I know the topic of reading/extracting the text from a PDF document 
natively in Python comes up every now and then on comp.lang.python... 
I've posted about it in the past myself. After searching for other 
solutions, I've resorted to attempting this on my own in my spare time. 
Using apps external to Python (pdftotext, etc.) is not really an option 
for me. If someone knows of a free native Python app that does this now, 
let me know and I'll use that instead!

So, if other more experienced programmer are interested in helping make 
the script better, please let me know. I can host a website and the 
latest revision and do all of the grunt work.

Thanks,

Brad


From rave247 at seznam.cz  Thu Sep  6 15:25:28 2007
From: rave247 at seznam.cz (=?us-ascii?Q?rave247=20rave247?=)
Date: Thu, 06 Sep 2007 21:25:28 +0200 (CEST)
Subject: =?us-ascii?Q?Re=3A=20Getting=20original=20working=20directory?=
In-Reply-To: <fbpjgm$5jv$1@sea.gmane.org>
Message-ID: <1505.1821-20120-1168490301-1189106727@seznam.cz>

Yes, I think you are right, without hacking into the parent process it will not work, and this is bad way. I hope I find the better way. Thanks for your comments

> ------------ P?vodn? zpr?va ------------
> Od: Steve Holden <steve at holdenweb.com>
> P?edm?t: Re: Getting original working directory
> Datum: 06.9.2007 21:15:10
> ----------------------------------------
> rave247 rave247 wrote:
> > If I could use os.getcwd() or save the value to some variable before calling
> os.chdir()
>  > I would do it, believe me. However I can't because it is the part of 
> code where I
>  > can't do any changes.
> > 
> > Also I do not agree that such thing is not possible because after python
> script
>  > finishes its work, it naturally gets back into the original location 
> from where
>  > you started the script (in shell you are in the original location 
> after script
>  > finishes). So this information has to be stored somewhere (probably 
> in shell which
>  > runs the interpreter) and there *must*  be a way how to get it. 
> Simply after
>  > calling os.chdir() the original value doen't disappear, I think it 
> just needs
>  >  some nice hack if python doesn't provide a way how to get it.
> > 
> Python runs as a sub-process. The parent process (the one that started 
> Python) contains the working directory that the Python interpreter 
> inherited from it. But you can't expect to just go poking around inside 
> the environment of your parent process, which will typically be waiting 
> for you to finish before it continues. Why *must* there be a way to get 
> at its current directory? Once it continues, of course, it does so in 
> the same directory. If you want to hack into your parent process to find 
> that information that's up to you, but Python certainly has no special 
> mechanism  for doing it.
> 
> If you treat the answers to all your questions with so little respect 
> it's a wonder you bother asking the questions in the first place.
> 
> You didn't even explain what the relationship was between the "myscript" 
> that you want to run and the Python code that you want to switch back to 
> the original working directory. Sorry, we aren't mind readers (though 
> some of the guys on this list get close on occasion).
> 
> regards
>   Steve
> -- 
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd           http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
> --------------- Asciimercial ------------------
> Get on the web: Blog, lens and tag the Internet
> Many services currently offer free registration
> ----------- Thank You for Reading -------------
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 
> 
> 


From kw at codebykevin.com  Thu Sep 27 10:23:17 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Thu, 27 Sep 2007 10:23:17 -0400
Subject: Tkinter / Tk 8.5
In-Reply-To: <op.tza09o0qwepdt4@ericb.pragmadev>
References: <pan.2007.09.26.20.31.31.424223@vscht.cz>
	<13fm60kbhr28fa8@corp.supernews.com>
	<op.tza09o0qwepdt4@ericb.pragmadev>
Message-ID: <46FBBCD5.3070106@codebykevin.com>

Eric Brunel wrote:
> On Thu, 27 Sep 2007 04:41:48 +0200, Scott David Daniels 
> <Scott.Daniels at Acm.Org> wrote:
> 
>> Michal Bozon wrote:
>>> Today has been released a first beta of Tk 8.5, including a Ttk
>>> (tile) style engine, which makes possible the native look
>>> of widgets on MS platform, without having to install any extension.
>>>  Is there a chance it will be included in 2.5.x, 2.6 or 3.0 ?
>>
>> This is just a guess, but:
>>     The beta: no way for anything.
>>     2.5.x: also very unlikely
>>     2.6: unlikely unless release is _soon_ (first alpha of 2.6 is out)
> 
> It won't be: tcl/tk development is quite slow. There have been several 
> months between each 5 or 6 alpha release and between the last alpha and 
> the beta. So don't expect the official release to come soon...
> 
>>     3.0: much more likely, 3.0 won't be out for some time.
> 
> This would be my guess too...

I'd say that Tk 8.5 will be out before Python 3.0: the beta phase should 
be fairly efficient on Tk.

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


From ricaraoz at gmail.com  Wed Sep 26 16:43:42 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Wed, 26 Sep 2007 17:43:42 -0300
Subject: Delete values from a string using the index
In-Reply-To: <1190838311.630506.64670@y42g2000hsy.googlegroups.com>
References: <1190838311.630506.64670@y42g2000hsy.googlegroups.com>
Message-ID: <46FAC47E.40606@bigfoot.com>

koutoo at hotmail.com wrote:
> How do I delete or remove values from a list or string using the
> index.
> 
> If a = [1,2,3,4,5,6,7,8] and I want to get rid of 1 -5, how would I do
> that?
> 
> Thanks.
> 

del a[1]
del a[-5]



From cjt22 at bath.ac.uk  Tue Sep  4 09:43:14 2007
From: cjt22 at bath.ac.uk (cjt22 at bath.ac.uk)
Date: Tue, 04 Sep 2007 06:43:14 -0700
Subject: Printing lists in columns (was: TypeError: 'module object is not
	callable')
In-Reply-To: <Xns99A18F8C528BCduncanbooth@127.0.0.1>
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<mailman.315.1188810174.28954.python-list@python.org>
	<46dbd11e$0$6228$426a74cc@news.free.fr>
	<mailman.317.1188812089.28954.python-list@python.org>
	<1188816626.021956.281040@22g2000hsm.googlegroups.com>
	<5k2cjmF1r2aiU1@mid.uni-berlin.de>
	<1188836008.656284.76160@o80g2000hse.googlegroups.com>
	<46dc6f49$0$6207$426a34cc@news.free.fr>
	<1188900397.459760.259580@k79g2000hse.googlegroups.com>
	<slrnfdqe3t.i4p.hat@se-162.se.wtb.tue.nl>
	<Xns99A17FAC2587duncanbooth@127.0.0.1>
	<1188906767.737741.267350@19g2000hsx.googlegroups.com>
	<Xns99A18F8C528BCduncanbooth@127.0.0.1>
Message-ID: <1188913394.763871.218660@d55g2000hsg.googlegroups.com>

On Sep 4, 2:06 pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> cj... at bath.ac.uk wrote:
> >> But watch out if the lists aren't all the same length: zip won't pad out
> >> any sequences, so it maynotbe exactly what is wanted here:
>
> >> >>> x = ['1', '2', '3']
> >> >>> y = ['4', '5']
> >> >>> for row in zip(x,y):
>
> >>         print ', '.join(row)
>
> >> 1, 4
> >> 2, 5
>
> > Unfortunately the lists will be of different sizes
>
> In that case use:
>
> from itertools import repeat, chain, izip
> def izip_longest(*args, **kwds):
>     fillvalue = kwds.get('fillvalue')
>     def sentinel(counter = ([fillvalue]*(len(args)-1)).pop):
>         yield counter()         # yields the fillvalue, or raises IndexError
>     fillers = repeat(fillvalue)
>     iters = [chain(it, sentinel(), fillers) for it in args]
>     try:
>         for tup in izip(*iters):
>             yield tup
>     except IndexError:
>         pass
>
> x = ['1', '2', '3']
> y = ['4', '5']
> for row in izip_longest(x,y, fillvalue='*'):
>     print ', '.join(row)
>
> which gives:
>
> 1, 4
> 2, 5
> 3, *
>
> (izip_longest is in a future version of itertools, but for
> now you have to define it yourself).

Thanks guys

I have a list of lists such as
 a = ["1" , "2"]  b = ["4", "5", "6"]  c = ["7",8", "9"]
Stored in another list: d = [a,b,c]

I know this makes me sound very stupid but how would I specify
in the parameter the inner lists without having to write them all out
such as:

for row in izip_longest(d[0], d[1], d[2], fillvalue='*'):
    print ', '.join(row)

i.e. How could I do the following if I didn't know how many list of
lists I had.
Sorry this sounds stupid and easy.
Thankyou very much in advance as well, you are all very helpful
indeed.



From chris.olekas at gmail.com  Mon Sep 10 11:57:41 2007
From: chris.olekas at gmail.com (Chris)
Date: Mon, 10 Sep 2007 08:57:41 -0700
Subject: Silent SaveAs when using the Excel win32com module
Message-ID: <1189439861.200686.245420@k79g2000hse.googlegroups.com>

I'm trying to create an excel file which will act as a log, however I
want to overwrite the file if it exists.

Looking at the SaveAs method I can't find anything that would allow
it. I don't want the prompt to appear to ask whether to replace the
file or not. I just want to replace it without thinking.

Thanks in advance.



From rrr at ronadam.com  Fri Sep 21 10:41:30 2007
From: rrr at ronadam.com (Ron Adam)
Date: Fri, 21 Sep 2007 09:41:30 -0500
Subject: Python 3K or Python 2.9?
In-Reply-To: <46f38907$0$27686$426a74cc@news.free.fr>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>	<46e7974d$0$31726$426a74cc@news.free.fr>	<fc8fc9$4qa$1@news2.carnet.hr>	<5kq1hgF4r90oU1@mid.individual.net>	<1189618530.872819.136450@57g2000hsv.googlegroups.com>	<uir6ctto7.fsf@yahoo.com>	<1190013827.107324.111820@w3g2000hsg.googlegroups.com>	<mailman.645.1190026962.2658.python-list@python.org>	<1190053757.091035.221570@22g2000hsm.googlegroups.com>	<mailman.857.1190359937.2658.python-list@python.org>
	<46f38907$0$27686$426a74cc@news.free.fr>
Message-ID: <fd0l6r$2ln$1@sea.gmane.org>



Bruno Desthuilliers wrote:
> Ron Adam a ?crit :
>>
>> TheFlyingDutchman wrote:
>>
>>> I am not talking about the way it does it, but rather, the way it
>>> could do it or... could have done it. That requires no knowledge of
>>> how the interpreter currently does it unless I am proposing something
>>> that no interpreter in the world could ever do.
> (snip)
>> So if you can find a way to do things like removing self in python in 
>> such a way that it doesn't require adding more to the Core interpreter, 
>> then it might be considered.
> 
> By who ? As far as I'm concerned, I don't want 'self' to be removed, and 
> I'm probably not the only one here.

The term "might be considered" in this case is a very very small 
possibility.  It would need to be a very good solution which has some very 
nice benifits over the current way.  As you say below, it's probably not 
possible.

This was more of a challenge to get anyone who thinks it's worth doing to 
learn more about how python works rather than just propose arbitrary ideas.


>> What I've found is as my skills improve, I take more advantage of being 
>> able to modify and/or introspect how things work.  This allows more 
>> choices on how I might solve a particular problem.
> 
> The changes required by removing self would make most of this either 
> painfull or near impossible AFAICT.

Right, It would have a cascade effect in many places.


>> I also think there a lots of improvements that could be made to other 
>> parts of python such as the libraries that would be of much more 
>> practical benefit.
> 
> indeed.

Cheers,
   Ron






From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Sep 17 05:07:04 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 17 Sep 2007 11:07:04 +0200
Subject: Python 3K or Python 2.9?
In-Reply-To: <1190016312.637754.109770@n39g2000hsh.googlegroups.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<87sl5j5r34.fsf@benfinney.id.au>
	<1189646281.569796.267940@d55g2000hsg.googlegroups.com>
	<87ir6f5mrq.fsf@benfinney.id.au>
	<1189651204.408268.57580@19g2000hsx.googlegroups.com>
	<1i4dddf.piaojwz9lz40N%aleax@mac.com>
	<1189700775.661780.292150@50g2000hsm.googlegroups.com>
	<46e97917$0$9014$426a74cc@news.free.fr>
	<mailman.563.1189823461.2658.python-list@python.org>
	<1190013177.473529.167770@o80g2000hse.googlegroups.com>
	<46ee2d9d$0$26213$426a74cc@news.free.fr>
	<1190016312.637754.109770@n39g2000hsh.googlegroups.com>
Message-ID: <46ee43b8$0$30545$426a74cc@news.free.fr>

TheFlyingDutchman a ?crit :
> <VivaLaFrance>
> If you wanna know why the Renault Dauphine requires the driver to pull
> down on the rearview mirror in order to shift into reverse you simply
> need to open the hood and remove the engine and disassemble the
> transmission and you will see that it has no way of distinguishing a
> shift into third from a shift into reverse without a rearview mirror
> pull. But these days most people just open the glove compartment when
> shifting into reverse which works just as well!
>  </VivaLaFrance>

Very interesting engineering problem. But a bit out of date and totally 
unrelated to Python. Anything else ?


From george.sakkis at gmail.com  Fri Sep  7 14:49:56 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 07 Sep 2007 18:49:56 -0000
Subject: Speed of Python
In-Reply-To: <mailman.230.1189183406.2658.python-list@python.org>
References: <mailman.230.1189183406.2658.python-list@python.org>
Message-ID: <1189190996.887575.27240@57g2000hsv.googlegroups.com>

On Sep 7, 12:42 pm, "wang frank" <f... at hotmail.co.jp> wrote:

> Is my conclusion correct that Python is slower than matlab? Are there any
> way to speed it up?

Yes, use Numpy for any non trivial number-crunching task: http://numpy.scipy.org/.
Even if you don't, you can speed up the original function by ~25% if
you replace range() with xrange() and bind the log function to a local
variable:

def bench2(n):
    from math import log
    for i in xrange(n):
        for j in xrange(1000):
            m=j+1
            z=log(m)
            z1=log(m+1)
            z2=log(m+2)
            z3=log(m+3)
            z4=log(m+4)
            z5=log(m+5)
            z6=log(m+6)
            z7=log(m+7)
            z8=log(m+8)
            z9=log(m+9)
    return z9


HTH,

George



From jd at nospam.com  Fri Sep 21 13:28:22 2007
From: jd at nospam.com (Jd)
Date: Fri, 21 Sep 2007 10:28:22 -0700
Subject: xml-rpc timeout 
Message-ID: <2_WdnTQ86eZNY27bnZ2dnUVZ_jCdnZ2d@comcast.com>

Hi
   I have a multi-threaded application. For certain operations to the
server, I would like to explicitly set timeout so that I get correct
status from the call and not timed out exception.
   Does anyone know how to go about doing it ?

/Jd


From raychorn at hotmail.com  Sat Sep 22 16:02:51 2007
From: raychorn at hotmail.com (Python Maniac)
Date: Sat, 22 Sep 2007 13:02:51 -0700
Subject: I could use some help making this Python code run faster using
	only Python code.
In-Reply-To: <Xns99B25B0334892duncanbooth@127.0.0.1>
References: <1190325588.608625.259800@q3g2000prf.googlegroups.com>
	<1190328413.226577.206740@k79g2000hse.googlegroups.com>
	<1190330015.131971.265680@y42g2000hsy.googlegroups.com>
	<1190357165.381313.197910@19g2000hsx.googlegroups.com>
	<Xns99B25B0334892duncanbooth@127.0.0.1>
Message-ID: <1190491371.189556.177790@d55g2000hsg.googlegroups.com>

On Sep 21, 12:56 am, Duncan Booth <duncan.bo... at invalid.invalid>
wrote:
> George Sakkis <george.sak... at gmail.com> wrote:
> > It has to do with the input string length; try multiplying it by 10 or
> > 100. Below is a more complete benchmark; for largish strings, the imap
> > version is the fastest among those using the original algorithm. Of
> > course using a lookup table as Diez showed is even faster. FWIW, here
> > are some timings (Python 2.5, WinXP):
>
> > scramble:       1.818
> > scramble_listcomp:      1.492
> > scramble_gencomp:       1.535
> > scramble_map:   1.377
> > scramble_imap:  1.332
> > scramble_dict:  0.817
> > scramble_dict_map:      0.419
> > scramble_dict_imap:     0.410
>
> I added another one:
>
> import string
> scramble_translation = string.maketrans(''.join(chr(i) for i in xrange
> (256)), ''.join(chr(i|0x80) for i in xrange(256)))
> def scramble_translate(line):
>     return string.translate(line, scramble_translation)
>
> ...
>     funcs = [scramble, scramble_listcomp, scramble_gencomp,
>              scramble_map, scramble_imap,
>              scramble_dict, scramble_dict_map, scramble_dict_imap,
>              scramble_translate
>          ]
>
> and I think I win:
>
> scramble:       1.949
> scramble_listcomp:      1.439
> scramble_gencomp:       1.455
> scramble_map:   1.470
> scramble_imap:  1.546
> scramble_dict:  0.914
> scramble_dict_map:      0.415
> scramble_dict_imap:     0.416
> scramble_translate:     0.007

Some benchmarks showing the effectiveness of using Psyco:

scramble:       4.210
scramble_listcomp:      2.343
scramble_gencomp:       2.599
scramble_map:   1.960
scramble_imap:  2.231
scramble_dict:  2.387
scramble_dict_map:      0.535
scramble_dict_imap:     0.726
scramble_translate:     0.010

Now with Psyco...
psyco.bind(scramble)...
scramble:       0.121   4.088   34.670x faster
scramble_listcomp:      0.215   2.128   10.919x faster
scramble_gencomp:       2.563   0.036   1.014x faster
scramble_map:   2.002   -0.043  0.979x slower
scramble_imap:  2.175   0.056   1.026x faster
scramble_dict:  0.199   2.188   11.983x faster
scramble_dict_map:      0.505   0.029   1.058x faster
scramble_dict_imap:     0.728   -0.001  0.998x slower
scramble_translate:     0.009   0.001   1.111x faster

Overall, Psyco helped my little process of converting 20 MB worth of
ASCII into what may not look like the original at 6x faster than
without Psyco.



From steve at REMOVE-THIS-cybersource.com.au  Sun Sep 16 18:48:19 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sun, 16 Sep 2007 22:48:19 -0000
Subject: Needless copying in iterations?
References: <fchk59$mm3$1@daisy.noc.ucla.edu>
	<5l3ab6F5v20uU3@mid.uni-berlin.de> <13eourdrne86e61@corp.supernews.com>
	<874phv42to.fsf@benfinney.id.au> <13epv3fnb6bak15@corp.supernews.com>
	<mailman.611.1189957782.2658.python-list@python.org>
Message-ID: <13ercljcg60mq99@corp.supernews.com>

On Sun, 16 Sep 2007 11:49:15 -0400, Steve Holden wrote:

>> It seems to me that the "consenting adults" philosophy of Python
>> doesn't extend to the compiler, and perhaps it should. Maybe Python
>> could optimize common cases, and if developers wanted to do wacky
>> things, let them turn optimization off on a module-by-module basis.
>> 
>> Or even function-by-function. Wouldn't it be nice to have decorators
>> that could optimize the functions they decorated?
>> 
> No, it would be disastrous, 

Disastrous, as in thousands dead, panic in the street, martial law 
declared? I'm sure your program in important, but is it really *that* 
important? :-)


> unless you could manage to implement a
> mechanism that *told* you when the optimizations were playing havoc with
> your program's execution.

How about "the test suite passes when I turn optimization off, but fails 
when I turn optimization on"? How is that any different from "the test 
suite passes when I use StringIO, but not if I use cStringIO"?


 
> The problem is that debugging only works if you can assume a
> deterministic environment. If you are going to put funky optimizations
> in that break determinism in "little-used" corner cases, then debugging
> the situations when the optimizations *do* affect program execution will
> be a complete pain.

Right, so we're back to the "any pixel is as likely as any other pixel" 
example from Joel On Software I mentioned earlier. To prevent some 
hypothetical developer doing some wacky thing from having to work harder 
to debug some weird corner case, *everybody else* has to miss out on 
optimizations that could lead to significantly better performance.

You might think that's a good trade-off. I don't.


>>>> for item in alist[1:5]:
>>>>     alist.append(item) # side-effects DON'T matter
>>> The compiler doesn't know that, at the time of invocation,
>>> 'alist.append' doesn't have side effects that matter.
>> 
>> It might if it knows what type alist is, and how long it is (as Marc
>> Rintsch points out). That's why I used "alist" in my example rather
>> than "an_arbitrary_sequence".
>> 
> But alist doesn't *have* a type, and static program analysis would have
> to be extensive to determine that it could only ever be of a specific
> type.

Of course alist has a type. Python is a strongly-typed language, not 
untyped.

And I don't believe I specifically mentioned that static program analysis 
was the only optimization possible. But even if it was...

I can *hand optimize* a function that I write, yes? I might *choose* to 
say to myself, "Screw duck typing, in *my* program function foo will only 
ever be called with an honest-to-god built-in list argument, I'm going to 
optimize it for that case". We're all consenting adults here, right?

Well, what's the difference between me hand optimizing the function, and 
calling a built-in decorator that does it for me? Why is it okay for me 
to shoot myself in the foot, but not for me to tell the compiler to shoot 
me in the foot?


>> Because of its very nature, optimizing Python is hard. Even something
>> as simple as tail-call recursion optimization is verboten, because
>> Guido considers good stack traces more important than preventing stack
>> overflows in the first place:
>> 
>> http://www.tratt.net/laurie/tech_articles/articles/
tail_call_optimization
>> 
> And who's to say he's wrong, especially since Python is intended to be
> an environment that's friendly to beginners.

I'm not saying he's *wrong*, I'm saying he's making trade-offs I would 
like to see relaxed.

But in the specific case of recursion... have you seen the exception you 
get when the recursion limit is hit? By default, you get 1000 lines of '  
File "foo", line 2, in function_name' followed by "RuntimeError: maximum 
recursion depth exceeded". Maybe I'm missing something there, but I don't 
see how that's much of a help in debugging.


>> Anyway, I'm not really complaining. I like Python, I'm grateful for the
>> work the Python-dev people have already done, and I'm in no position to
>> volunteer to write an optimizing compiler. And it may be that,
>> regardless of how smart you make the compiler, Python simply can't be
>> optimized because of design decisions made back in 1990-whatever when
>> Guido first started his grand plan.
>> 
> There is some of that. The environment is so dynamic that even something
> as innocuous as attribute lookup can actually involve properties (for
> example) reading a relational database! I'm not saying that optimization
> under these circumstances is possible, but that it's much more difficult
> than is easily anticipated, and that the benefits to be gained might be
> less than you would think.

I'm mostly objecting to people who say that Python's compiler "can't" be 
optimized, which is not true. As I mentioned, there's already a peephole 
optimizer. There are runtime optimizations possible. Psycho could become 
a built-in, if the right people wanted it to become a built-in. Etc. With 
a few million in funding, Python could become as heavily optimized as 
Common Lisp.

Of course, whether that would still be the Python we know *now* is 
another question. But then, with decorators and generator expressions and 
iterators, Python 2.6 is not precisely the same as the Python we knew 
back in 1997, is it?



-- 
Steven.


From antroy at gmail.com  Sat Sep 29 06:46:18 2007
From: antroy at gmail.com (Ant)
Date: Sat, 29 Sep 2007 03:46:18 -0700
Subject: Python 3.0 migration plans?
In-Reply-To: <mailman.1195.1190936289.2658.python-list@python.org>
References: <mailman.1195.1190936289.2658.python-list@python.org>
Message-ID: <1191062778.951573.166480@d55g2000hsg.googlegroups.com>

I've posted my vote. However, I guess it won't be that simple in
practice. I suspect that the following is more likely:

1) Migrate to 3000 fairly soon after release for scripts and new
projects for which required third party modules are available for 3k
2) Migrate existing projects to 3k a) when frameworks/modules that
they use are available and b) if and when doing so would be
advantageous.

I suspect that many of the projects I have that are solid and are in
no imminent need of development will remain <3k for several years.

Cheers,

--
Ant



From jonas.maurus at gmail.com  Wed Sep 19 16:48:33 2007
From: jonas.maurus at gmail.com (Jonas Maurus)
Date: Wed, 19 Sep 2007 20:48:33 -0000
Subject: limiting memory consumption of Python itself or a dict in a Python
	program
Message-ID: <1190234913.608070.5410@19g2000hsx.googlegroups.com>

Hello everybody,

I'm pondering the following problem:

I want to write a Python program that receives messages via SMTP and
stores them in a dict or an array. For my purposes it would be
important that all received mail would be kept in RAM and not cached
out to disk. If a new message comes in that can't fit in the allocated
memory, a number of old messages would be discarded.

As the server needs to have room for other tasks, I'd like to limit
the overall memory consumption to a certain amount.

Is this possible? How would I go about implementing it? By imposing
"ulimit"s and catching MemoryError?

Thanks for your help,
Jonas



From jstroud at mbi.ucla.edu  Thu Sep 20 20:38:00 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 20 Sep 2007 17:38:00 -0700
Subject: executing list of methods (and collecting results)
In-Reply-To: <mailman.839.1190329275.2658.python-list@python.org>
References: <mailman.839.1190329275.2658.python-list@python.org>
Message-ID: <fcv3n2$tsd$1@daisy.noc.ucla.edu>

Gerardo Herzig wrote:
> Hi all. Im in this situation: I want to perform several kind of 
> (validating) methods to a given value.
> Lets say i have a class named Number, and the following methods:
> is_really_a_number(),
> is_even(),
> is_greater_than_zero(),
> and so on. All of them returning booleans.
> 
> I want the collect_validators() method is to execute any of the above 
> methods, and collect their names as items of a list (wich will be the 
> collect_validators() return value).
> 
> My first approach is:
> 
> [code]
> def collect_validators(self):
>    v_dict = { 'is_really_a_number': is_really_a_number,
>                      'is_even': is_even,
>                      'is_greater_than_zero', is_greater_than_zero
>                   }
> 
>       for name, meth in v_dict.items():
>          result = meth()
>          if result: yield name
> [/code]
> 
> I wondering if is this a good pattern to apply, i like the way it looks 
> like, at least to me it looks `natural', but...im calling every method 
> twice here? One in v_dict and again on the dict iteration?
> 
> Any suggestion will be great!
> 
> Thanks!
> Gerardo

You are not calling every method twice. You are painstakingly typing out 
their names twice. But fortunately, functions and methods have a 
__name__ attribute which makes a this typing redundant. I would give 
your class instances a _validators attribute which is a list of 
validating methods, then make the generator like this:

def collect_validators(self):
   for v in self._validators:
     if v():
       yield v.__name__

James


From jura.grozni at gmail.com  Sat Sep 22 13:24:29 2007
From: jura.grozni at gmail.com (azrael)
Date: Sat, 22 Sep 2007 10:24:29 -0700
Subject: Help for Otsu implementation from C
In-Reply-To: <1190230388.764546.114690@57g2000hsv.googlegroups.com>
References: <1190201086.468348.274850@g4g2000hsf.googlegroups.com>
	<fcr2o9$l32$03$1@news.t-online.com>
	<1190230388.764546.114690@57g2000hsv.googlegroups.com>
Message-ID: <1190481869.029440.240720@22g2000hsm.googlegroups.com>

Thanks Man, I did it. It works fantastic.


On Sep 19, 9:33 pm, azrael <jura.gro... at gmail.com> wrote:
> I know. The translation is not so important to me, because this is
> going to just a little function that is working in the last step of
> the whole proces. The whole implementation wont be published and has
> just the meaning to implement a first alpha version of a face
> recognition system. It is nearly finished, and this is the only
> function I am missing. For this purpose I need it to work "EXACTLY".
>
> I know that it doesnt look pythonic. After I know that it works
> correctly, I am going to write a total Rewrite for the Beta Version.
>
> On Sep 19, 1:55 pm, Peter Otten <__pete... at web.de> wrote:
>
> > azrael wrote:
> > > Can somone look at this
> > > def otsu(hi):
> > >     fmax=-1.0
> > >     border=len(hi)
> > >     for i in range(border):
> > >         if hi[i]!=0:break
> > >     for j in range(border-1,0-1,-1):
> > >         if hi[j] != 0:break
> > >     s = sum([k*hi[k] for k in range(border)]) n = sum(hi) #
> > >     product(im.size)
> > >     n1=n2=csum=0.0
> > >     for k in range(i,j):
> > >         n1 += hi[k]
> > >         n2  = n - n1
> > >         csum+= k * hi[k]
> > >         m1 = csum/ n1
> > >         m2 = (s - csum)/n2
>
> > As I said in my previous post, try replacing this line
>
> > >         sb = n1 * n2 * (m2 - m1)
>
> > with the original
>
> >           sb = n1 * n2 * (m1 - m2) * (m1 - m2)
>
> > that has been commented out.
>
> > >         if sb > fmax:
> > >             fmax = sb
> > >             V=k+1
> > >     print V
> > > I try to implement it from C from this location.
>
> > Personally, I would start with a literal translation and not try to
> > improve it until it works.
>
> > Peter




From steve at REMOVE-THIS-cybersource.com.au  Wed Sep 12 08:38:13 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Wed, 12 Sep 2007 12:38:13 -0000
Subject: newbie: self.member syntax seems /really/ annoying
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
Message-ID: <13efndlln9n9659@corp.supernews.com>

On Wed, 12 Sep 2007 03:21:58 -0700, Charles Fox wrote:

> I've just started playing around with Python, as a possible replacement
> for a mix of C++, Matlab and Lisp.  The language looks lovely and clean
> with one huge exception:  I do a lot of numerical modeling, so I deal
> with objects (like neurons) described mathematically in papers, by
> equations like
>     a_dot = -k(a-u)
> In other languages, this translates nicely into code, but as far as I
> can tell, Python needs the ugly:
>     self.a_dot = -self.k(self.a-self.u)

I think you've been seriously mislead. You don't NEED self. That's only 
for writing classes.

Although Python is completely object oriented, and everything is an 
object, you don't have to put your code in classes.

Instead of doing something like this:

class Adder(object):
    """Pointless class to add things."""
    def __init__(self, value):
        self.value = other
    def add(self, other):
        x = self.value + other
        return float(x)

you don't need a class. Just write a function:

def add(x, other):
    """Function that adds other to x."""
    return float(x + other)

Here's how I would write your function above:

def function(a, u, k):
    """Calculate a_dot from a, u and k."""
    return -k(a-u)

And here is how I would use it:

a = 57 # or whatever...
u = 54
k = 3
a_dot = function(a, u, k)


See? Not a single "self" in sight.


You might also like to read about a strange, bizarre programming that 
forces you to put everything inside classes:

http://steve-yegge.blogspot.com/2006/03/execution-in-kingdom-of-nouns.html




-- 
Steven.


From steven.bethard at gmail.com  Fri Sep 28 13:44:07 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 28 Sep 2007 11:44:07 -0600
Subject: getopt with negative numbers?
In-Reply-To: <1190999036.588941.165610@g4g2000hsf.googlegroups.com>
References: <1190913250.198794.269530@k79g2000hse.googlegroups.com>
	<fdgpic$ssu$00$1@news.t-online.com>
	<1190915197.390247.313590@57g2000hsv.googlegroups.com>
	<fdgri5$ssu$00$2@news.t-online.com>
	<mailman.1182.1190917341.2658.python-list@python.org>
	<1190930134.780005.68510@22g2000hsm.googlegroups.com>
	<mailman.1196.1190937544.2658.python-list@python.org>
	<1190944143.521085.66910@g4g2000hsf.googlegroups.com>
	<871wcj4ib9.fsf@benfinney.id.au>
	<1190999036.588941.165610@g4g2000hsf.googlegroups.com>
Message-ID: <GdednaFCqLj6oGDbnZ2dnUVZ_g6dnZ2d@comcast.com>

Casey wrote:
> Ben Finney wrote:
>> I believe they shouldn't because the established interface is that a
>> hyphen always introduced an option unless (for those programs that
>> support it) a '--' option is used, as discussed.
>
> Not "THE" established interface; "AN" established interface.  There
> are other established interfaces that have different behaviors. I'm a
> pragmatist; I write software for users, not techies.  I suspect most
> users would expect a command like "abc -a -921 351 175" to treat the
> "-921" as a negative integer and not abort the program with some
> obscure error about option 921 not being known.

Glad I'm not alone in this. ;-) A user shouldn't have to go out of their 
way to specify regular numbers on the command line, regardless of 
whether they're positive or negative.

STeVe



From gagsl-py2 at yahoo.com.ar  Sat Sep 22 01:31:01 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 22 Sep 2007 02:31:01 -0300
Subject: threading.local _threading_local problems
References: <wvednQdqvJ0jnWnbnZ2dnUVZ_tOdnZ2d@comcast.com>
Message-ID: <op.ty1ixzf8x6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 21 Sep 2007 14:36:34 -0300, Jd <jd at nospam.com> escribi?:

> Hi
>   I have the following situation.. Have a worker thread, that does the
> "work" given to it. While doing work, some of the objects use thread
> local storage for storing that requires explicit close. e.g. connection
> handles. These objects are long living. The worker, does not have any
> direct access to the objects.
>
>   I would like to clean up thread local area explicitly so that I do not
> run out of connection handles. Any ideas on how to access local storage
> from the thread ? (threading.local() gives new object everytime.. I am
> looking for something like singleton / global access from within the  
> thread)

Create a local() object *once*; it may be a global variable. Then assign  
to its attributes from any thread. Each thread will see a different set of  
attributes.

>   Or is there anyway to notify the object when the thread for which it
> set the local storage is going away ?

Do that at the end of the thread's run method.

-- 
Gabriel Genellina



From heikki at osafoundation.org  Fri Sep 21 04:07:44 2007
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Fri, 21 Sep 2007 01:07:44 -0700
Subject: M2Crypto 0.18 - new version, same old build bugs.
In-Reply-To: <eiAIi.10067$924.3670@newssvr23.news.prodigy.net>
References: <eiAIi.10067$924.3670@newssvr23.news.prodigy.net>
Message-ID: <xoudna66YI1O5m7bnZ2dnUVZ_umdnZ2d@comcast.com>

John Nagle wrote:
> Back in March, I posted this:
> 
>>     Hit that with OpenSSL.  Red Hat took elliptical curve cryptography
>> out of Fedora 6 for patent reasons.  With that missing, M2Crypto won't
>> build.  It ought to; the implementor of M2Crypto thought of that, because
>> it's an optional feature.  But M2Crypto uses SWIG.  SWIG doesn't normally
>> process nested include files.  OpenSSL had changed their configuration
>> approach to use nested include files.  So SWIG didn't see the #define
>> that
>> said to turn off elliptical curve crypto support.  This resulted in
>> compile errors in the 24,000 lines of code that come out of SWIG. 
> 
>    That was for M2Crypto 0.17.
> 
>    It's still broken in M2Crypto 0.18.

This was reported as
https://bugzilla.osafoundation.org/show_bug.cgi?id=9404 and fixed, at
least according to the person who reported the bug. I'd be curious to
know why the fix does not work for you...

As an alternative, does it work if you add line 130 to setup.py:

'-DOPENSSL_NO_EC', # Uncomment if you have
trouble compiling without EC support

-- 
  Heikki Toivonen


From ptmcg at austin.rr.com  Thu Sep 13 14:22:31 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Thu, 13 Sep 2007 11:22:31 -0700
Subject: plotting pixels in python
In-Reply-To: <1189706620.564963.29690@d55g2000hsg.googlegroups.com>
References: <1189706620.564963.29690@d55g2000hsg.googlegroups.com>
Message-ID: <1189707751.846412.51420@r29g2000hsg.googlegroups.com>

On Sep 13, 1:03 pm, jo5867... at gmail.com wrote:
> hi to all
> I am just a beginner of python. I want to know how pixels are plotted
> in python. I am not intending to use PIL because I don't need to
> manipulate images. So is there a simple module for 2D graphics and
> plot pixels

Here is a *very* simple-minded module for creating BMP files, that
supports drawing points, lines, and simple shapes.

http://www.geocities.com/ptmcg/python/index.html#bmp

-- Paul



From grante at visi.com  Sat Sep 29 11:35:36 2007
From: grante at visi.com (Grant Edwards)
Date: Sat, 29 Sep 2007 15:35:36 -0000
Subject: Program inefficiency?
References: <1191079347.192272.240540@22g2000hsm.googlegroups.com>
Message-ID: <13fss68juscn33@corp.supernews.com>

> [...]
> the program works great except for one thing. It's significantly
> slower through the later files in the search then through the early
> ones... Before anyone criticizes, I recognize that that middle section
> could be simplified with a for loop... I just haven't cleaned it
> up...
>
> The problem is that the first 300 files take about 10-15 seconds and
> the last 300 take about 2 minutes... If we do more than about 1500
> files in one run, it just hangs up and never finishes...
>
> Is there a solution here that I'm missing? What am I doing that is so
> inefficient?

The only thing I see is that you compile all of the RE's every
time you call replacecycle().  They really only need to be
compiled once, but I don't know why that would cause the
progressive slowing.

FWIW, it seems to me like a shell+sed script would be the
obvious solution to the problem.

> # File: masseditor.py
>
> import re
> import os
> import time
>
> def massreplace():
>     editfile = open("pathname\editfile.txt")
>     filestring = editfile.read()
>     filelist = filestring.splitlines()
> ##    errorcheck = re.compile('(a name=)+(.*)(-)+(.*)(></a>)+')
>     for i in range(len(filelist)):
>         source = open(filelist[i])
>         starttext = source.read()
>         interimtext = replacecycle(starttext)
>         interimtext = replacecycle(interimtext)
>         interimtext = replacecycle(interimtext)
>         interimtext = replacecycle(interimtext)
>         interimtext = replacecycle(interimtext)
>         interimtext = replacecycle(interimtext)
>         interimtext = replacecycle(interimtext)
>         interimtext = replacecycle(interimtext)
>         interimtext = replacecycle(interimtext)
>         interimtext = replacecycle(interimtext)
>         interimtext = replacecycle(interimtext)
>         interimtext = replacecycle(interimtext)
>         finaltext = replacecycle(interimtext)
>         source.close()
>         source = open(filelist[i],"w")
>         source.write(finaltext)
>         source.close()
> ##        if errorcheck.findall(finaltext)!=[]:
> ##            print errorcheck.findall(finaltext)
> ##            print filelist[i]
>         if i == 100:
>             print "done 100"
>             print time.clock()
>         elif i == 300:
>             print "done 300"
>             print time.clock()
>         elif i == 600:
>             print "done 600"
>             print time.clock()
>         elif i == 1000:
>             print "done 1000"
>             print time.clock()
>     print "done"
>     print i
>     print time.clock()
>
> def replacecycle(starttext):
>     p1= re.compile('(href=|HREF=)+(.*)(#)+(.*)( )+(.*)(">)+')
>     p2= re.compile('(name=")+(.*)( )+(.*)(">)+')
>     p3= re.compile('(href=|HREF=)+(.*)(#)+(.*)(\')+(.*)(">)+')
>     p4= re.compile('(name=")+(.*)(\')+(.*)(">)+')
>     p5= re.compile('(href=|HREF=)+(.*)(#)+(.*)(-)+(.*)(">)+')
>     p6= re.compile('(name=")+(.*)(-)+(.*)(">)+')
>     p7= re.compile('(href=|HREF=)+(.*)(#)+(.*)(<)+(.*)(">)+')
>     p8= re.compile('(name=")+(.*)(<)+(.*)(">)+')
>     p7= re.compile('(href=|HREF=")+(.*)(#)+(.*)(:)+(.*)(">)+')
>     p8= re.compile('(name=")+(.*)(:)+(.*)(">)+')
>     p9= re.compile('(href=|HREF=")+(.*)(#)+(.*)(\?)+(.*)(">)+')
>     p10= re.compile('(name=")+(.*)(\?)+(.*)(">)+')
>     p100= re.compile('(a name=)+(.*)(-)+(.*)(></a>)+')
>     q1= r"\1\2\3\4_\6\7"
>     q2= r"\1\2_\4\5"
>     interimtext = p1.sub(q1, starttext)
>     interimtext = p2.sub(q2, interimtext)
>     interimtext = p3.sub(q1, interimtext)
>     interimtext = p4.sub(q2, interimtext)
>     interimtext = p5.sub(q1, interimtext)
>     interimtext = p6.sub(q2, interimtext)
>     interimtext = p7.sub(q1, interimtext)
>     interimtext = p8.sub(q2, interimtext)
>     interimtext = p9.sub(q1, interimtext)
>     interimtext = p10.sub(q2, interimtext)
>     interimtext = p100.sub(q2, interimtext)
>
>     return interimtext
>
> massreplace()
>


-- 
Grant Edwards                   grante             Yow!  Are you still
                                  at               SEXUALLY ACTIVE? Did you
                               visi.com            BRING th' REINFORCEMENTS?


From newsuser at stacom-software.de  Fri Sep  7 04:35:27 2007
From: newsuser at stacom-software.de (Alexander Eisenhuth)
Date: Fri, 07 Sep 2007 10:35:27 +0200
Subject: Class design (information hiding)
Message-ID: <fbr2gg$ipg$1@online.de>

Hi all,

I'm wodering how the information hiding in python is ment. As I understand there 
  doesn't exist public / protected / private  mechanism, but a '_' and '__' 
naming convention.

As I figured out there is only public and private possible as speakin in "C++ 
manner". Are you all happy with it. What does "the zen of python" say to that 
design? (protected is useless?)


class A:
	def __init__(self):
		self.__z = 1
		self._z = 2
		self.z = 3
	def _getX(self):
		return "X"
	def __getY(self):
		return "Y"
	def doAnything(self):
		print self.__getY()


class B(A):
	def __init__(self):
		A.__init__(self)
		print dir (self)
 >>> b = B()
['_A__getY', '_A__z', '__doc__', '__init__', '__module__', '_getX', '_z', 
'doAnything', 'z']

I was a bit surprised about '_A__getY' and '_A__z'.

What would you say to a C++ Programmer about class interfaces in big Python 
systems? What is the idea behind the _ and __ naming. Use or don't use '_' 
methods ? (As Designer of the software, as Programmer of the software)

Regards Alexander



		


From m.n.summerfield at googlemail.com  Tue Sep 25 16:55:22 2007
From: m.n.summerfield at googlemail.com (Mark Summerfield)
Date: Tue, 25 Sep 2007 13:55:22 -0700
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <1190748509.786571.124150@n39g2000hsh.googlegroups.com>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>
Message-ID: <1190753722.026806.254530@d55g2000hsg.googlegroups.com>

On 25 Sep, 20:28, Paul Hankin <paul.han... at gmail.com> wrote:
> On Sep 25, 7:58 pm, Steven Bethard <steven.beth... at gmail.com> wrote:
>
>
>
> > > Paul Hankin wrote:
> > > ...
> > > class sorteddict(dict):
> > >     "A sorted dictionary"
> > >     def __init__(self, arg=None, cmp=None, key=None, reverse=False):
> > >         if arg:
> > >     ...
>
> > With this is the implementation, I'm definitely -1. Not because it's a
> > bad implementation, but because if the iteration is always doing a sort,
> > then there's no reason for a separate data structure. Just use sorted()
> > directly on a regular dict. That has the advantage of being much more
> > obvious about where the expensive operations are::
>
> >      for key in sorted(d, ...):
> >          ... whatever you want to do ...
>
> > IMHO, the only reason to introduce a sorteddict() is if it minimizes the
> > cost of sorting the keys.
>
> I disagree with your reason for introducing a sorteddict - the main
> reason should be if it makes code that uses it simpler and more
> readable, with efficiency (within reasonable limits) being of
> secondary importance. Unfortunately for sorteddict, your code is
> simpler and more explicit for most obvious use cases.
>
> But, with Bill's cached sorted key list it'll be reasonably efficient,
> and it's likely possible to update the sorted cache more efficiently
> than resorting if there's only been a small number of insertions since
> the last sort, but I haven't the time to do a thorough job.
>
> --
> Paul Hankin

I think that keeping a sorted list of keys is worthwhile, but because
the key or cmp functions could access keys or values or both you have
to invalidate whenever a key or value is added or changed. Here's my
version (v. similar to yours of course, but sorting when necessary):

class sorteddict(dict):

    def __init__(self, iterable=None, cmp=None, key=None,
reverse=False):
        if iterable is None:
            iterable = []
        dict.__init__(self, iterable)
        self.__cmp = cmp
        self.__key = key
        self.__reverse = reverse
        self.__keys = None

    def update(self, *args, **kwargs):
        dict.update(self, *args, **kwargs)
        self.__keys = None

    @classmethod
    def fromkeys(cls, iterable, value=None):
        dictionary = cls()
        for key in iterable:
            dictionary[key] = value
        return dictionary

    def copy(self):
        dictionary = sorteddict(dict.copy(self), cmp=self.__cmp,
                                key=self.__key,
reverse=self.__reverse)
        dictionary.__keys = None if self.__keys is None else
self.__keys[:]
        return dictionary

    def clear(self):
        self.__keys = None
        dict.clear(self)

    def setdefault(self, key, value):
        self.__keys = None
        return dict.setdefault(self, key, value)

    def pop(self, key, value=None):
        if key not in self:
            return value
        self.__keys = None
        return dict.pop(self, key, value)

    def popitem(self):
        self.__keys = None
        return dict.popitem(self)

    def keys(self):
        if self.__keys is None:
            self.__keys = sorted(dict.keys(self), cmp=self.__cmp,
                                 key=self.__key,
reverse=self.__reverse)
        return self.__keys[:]

    def values(self):
        if self.__keys is None:
            self.__keys = sorted(dict.keys(self), cmp=self.__cmp,
                                 key=self.__key,
reverse=self.__reverse)
        return [self[key] for key in self.__keys]

    def items(self):
        if self.__keys is None:
            self.__keys = sorted(dict.keys(self), cmp=self.__cmp,
                                 key=self.__key,
reverse=self.__reverse)
        return [(key, self[key]) for key in self.__keys]

    def __iter__(self):
        if self.__keys is None:
            self.__keys = sorted(dict.keys(self), cmp=self.__cmp,
                                 key=self.__key,
reverse=self.__reverse)
        return iter(self.__keys)

    def iterkeys(self):
        if self.__keys is None:
            self.__keys = sorted(dict.keys(self), cmp=self.__cmp,
                                 key=self.__key,
reverse=self.__reverse)
        return iter(self.__keys)

    def itervalues(self):
        if self.__keys is None:
            self.__keys = sorted(dict.keys(self), cmp=self.__cmp,
                                 key=self.__key,
reverse=self.__reverse)
        for key in self.__keys:
            yield self[key]

    def iteritems(self):
        if self.__keys is None:
            self.__keys = sorted(dict.keys(self), cmp=self.__cmp,
                                 key=self.__key,
reverse=self.__reverse)
        for key in self.__keys:
            yield key, self[key]

    def __delitem__(self, key):
        self.__keys = None
        dict.__delitem__(self, key)

    def __setitem__(self, key, value):
        self.__keys = None
        dict.__setitem__(self, key, value)

    def __repr__(self):
        return str(self)

    def __str__(self):
        if self.__keys is None:
            self.__keys = sorted(dict.keys(self), cmp=self.__cmp,
                                 key=self.__key,
reverse=self.__reverse)
        return "{%s}" % ", ".join(
               ["%r: %r" % (key, self[key]) for key in self.__keys])



From tec at knology.net  Mon Sep 10 10:57:45 2007
From: tec at knology.net (Tim)
Date: Mon, 10 Sep 2007 07:57:45 -0700
Subject: shared memory pointer
Message-ID: <1189436265.841415.234050@w3g2000hsg.googlegroups.com>

Hello Everyone,

I am getting shared memory in python using the following.

szName = c_char_p(name)
hMapObject = windll.kernel32.CreateFileMappingA(INVALID_HANDLE_VALUE,
            None, PAGE_READONLY, 0, TABLE_SHMEMSIZE, szName)
if (hMapObject == 0):
            print "OpenKey: Could not open name file mapping object"
            raise WinError()

self.pData = windll.kernel32.MapViewOfFile(hMapObject,
       FILE_MAP_ALL_ACCESS, 0, 0, TABLE_SHMEMSIZE)

This seems to work OK. How do I get to the data in self.pData? It is
suppose to be an array of floats. I think MapViewOfFile returns a
point to the data. Here is what I tried.

current_time = 45.55
memcpy( current_time, self.pData, 4 )

but I get an error:

ArgumentError: argument 1: <type 'exceptions.TypeError'>: Don't know
how to convert parameter 1

I need to get my floating point array casted from the self.pData. Any
help would be appreciated!

Thanks
Tim



From steve at REMOVE-THIS-cybersource.com.au  Sat Sep 22 20:02:52 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sun, 23 Sep 2007 00:02:52 -0000
Subject: Would Anonymous Functions Help in Learning Programming/Python?
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<XIbJi.36$ua4.28@newssvr22.news.prodigy.net>
	<7xy7eysfc0.fsf@ruckus.brouhaha.com>
	<hXeJi.7647$FO2.4554@newssvr14.news.prodigy.net>
	<7xbqbu1k7a.fsf@ruckus.brouhaha.com>
Message-ID: <13fbb9c51ksaj19@corp.supernews.com>

On Sat, 22 Sep 2007 14:09:13 -0700, Paul Rubin wrote:

>> Nevertheless, def is never a real anonymous function constructor.
> 
> Well, def constructs a function with a name, but the function can stay
> around after the name goes away, after which I'd say the function is
> nameless.  One could otherwise say that (lambda x: x+x) is not anonymous
> either, since id(lambda ...) is a unique label stuck to it like a
> __name__.

If you want to be tediously pedantic, lambda doesn't construct anonymous 
functions either: you can bind them to a name, and whether you do or not, 
they have a name.

>>> f = lambda: 3
>>> f.__name__
'<lambda>'

It's just that all functions created by lambda share the same name.

If you really want an anonymous function...

>>> def foo():
...     return 3
...
>>> foo.__name__ = ''
>>> foo
<function  at 0x97a26bc>


I know, I know, I'm being tediously pedantic... and that's not what the 
anonymity of lambda refers to. What it actually means is that the lambda 
doesn't create a name in a namespace. In that regard, calling a factory 
function is also anonymous, because the function isn't added to the 
calling code's namespace.

Or, to put it another way...

def factory():
    def foo():
        return 3
    return foo


Within factory(), foo() is not an anonymous function, because 'foo' is in 
the local namespace. But the result of factory() is anonymous in the same 
sense that lambda is: although the function object has a attribute 
__name__ set to 'foo', calling factory() doesn't modify the caller's 
namespace (unless you assign the result to a name).


-- 
Steven.


From gslindstrom at gmail.com  Fri Sep  7 15:09:06 2007
From: gslindstrom at gmail.com (Greg Lindstrom)
Date: Fri, 7 Sep 2007 14:09:06 -0500
Subject: Python and Cron
In-Reply-To: <46E19CAE.10205@ulmcnett.com>
References: <a9f39a410709071024u3e669bafu128e8e88c64e072c@mail.gmail.com>
	<46E19CAE.10205@ulmcnett.com>
Message-ID: <a9f39a410709071209o713d77ebrc25b6dc6a8fbae35@mail.gmail.com>

> Can you post the Python script?


Not the whole thing; it's quite long.  But here's the relevant parts.  We're
using the ado database interface into postgres (that's what the
results.EOFis all about)

output_file = file(output_path, 'w')   # output_path =
/my_path/data/work/my_file.txt
while not results.EOF:
row = results.GetRowAssoc(upper=0)
output_file.write(row['data'])
results.MoveNext()
output_file.close()
debug('Total Bytes Written: %d' % total_bytes)

new_path = None
if total_bytes > 0:   new_path = output_path.replace('/work/', '/')
else:                     new_path = output_path.replace('/work/',
'/empty/')

debug('Original Path [%s]'%output_path)   # new_path =
/my_path/data/my_file.txt
debug('     New Path [%s]'%new_path)      # new_path =
/my_path/data/empty/my_file.txt


The original code looked like this (worked from command line, failed with
cron)

os.rename(output_path, new_path)

But since that didn't work and I could create a new file, I tried this as a
work around

output_file = file(new_path, 'w')
for line in file(output_path):
output_file.write(line)
output_file.close()

The interesting/infuriating thing is that the second method also fails; that
is, the file is not moved to the data directory or the "empty"
directory...it remains in the "work" directory after the cron job
completes.  If I run the same routine from the command like (after su'ing to
the edith user) it runs and moves the file to the appropriate directory.

I am going to see if we can get the email routing set up (we run over 100
cron jobs daily so I'm not sure I want it on too long) to see if it will
tell me anything.


Thanks for your time and effort
--greg



What's the name of the original file, and what are you trying to rename
> it to? I'm wondering if you are deriving the new name from something,
> and that thing is failing from within the cronjob for some reason.
> Perhaps the new name contains a complete path in one of the cases but
> not in the other...
>
> Edith should be getting email (if email routing is set up correctly) if
> the job is failing or producing output. Specifically, perhaps she's
> getting Python tracebacks and not telling you... :)
>
>
>
> --
> pkm ~ http://paulmcnett.com
>
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From bignose+hates-spam at benfinney.id.au  Mon Sep 10 22:12:05 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 11 Sep 2007 12:12:05 +1000
Subject: Enum class with ToString functionality
References: <1189416537.050002.61120@r34g2000hsd.googlegroups.com>
	<87bqca9hrw.fsf@benfinney.id.au>
	<1189472591.797327.189180@w3g2000hsg.googlegroups.com>
Message-ID: <87sl5m7xxm.fsf@benfinney.id.au>

TheFlyingDutchman <zzbbaadd at aol.com> writes:

> >     <URL:http://cheeseshop.python.org/pypi/enum/>

(Please preserve attribution lines so it's clear who wrote what.)

> Looking at the documentation it looks excellent. But I don't
> understand the 0.4.2 version number,

Note the tag that says the "Development Status" is "Beta".

> particularly when you refer to it as robust.

I assume you're referring to the short description, "Robust enumerated
type support in Python".

That refers to the implemented type as robust, not the state of the
code. That is, the short description should be read as "Support, in
Python, for robust enumerated types". It's a description of the
package functionality.

If, of course, the state of the code is not robust, that's a bug that
needs to be fixed; but that's true for any package.

-- 
 \     "Try to become not a man of success, but try rather to become a |
  `\                                   man of value." ?Albert Einstein |
_o__)                                                                  |
Ben Finney


From mail at microcorp.co.za  Thu Sep 20 02:51:38 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 20 Sep 2007 08:51:38 +0200
Subject: Tutorial or Example (or Tutorial) of Using Canvas to Producea Plot
References: <phRHi.50851$Um6.35199@newssvr12.news.prodigy.net><13evohih7rkd030@corp.supernews.com><WPTHi.5906$FO2.4148@newssvr14.news.prodigy.net><13f0b2qlvj5ige6@corp.supernews.com><hnWHi.9038$z_5.1095@nlpi069.nbdc.sbc.com><9ai0f39lejmjc2qbfcgo1t4h8b3e6ot9jd@4ax.com><1190185249.235840.263260@50g2000hsm.googlegroups.com>
	<Mn9Ii.9921$924.3247@newssvr23.news.prodigy.net>
Message-ID: <00f601c7fb59$31ba42e0$03000080@hendrik>


"W. Watson" <wolf_tracks at invalid.com> wrote:


> I'm just trying to get some feel for how canvas works. I'm about to modify a 
> program I use for meteor work. It uses canvas to display images, and I plan 
> to draw on the image. For example, I plan to draw compass headings on a 
> circle every 30 degrees. Just warming up to the task.

Don't be surprised if you can't draw a full circle - I have never managed it,
but 359.99 degrees works fine

- Hendrik



From paul.nospam at rudin.co.uk  Fri Sep 21 11:03:45 2007
From: paul.nospam at rudin.co.uk (Paul Rudin)
Date: Fri, 21 Sep 2007 16:03:45 +0100
Subject: acronym program
References: <mailman.871.1190386285.2658.python-list@python.org>
Message-ID: <87lkb0hxgu.fsf@rudin.co.uk>

Shawn Minisall <trekker182 at gmail.com> writes:

> I'm trying to write a program that gets the first letter of every word
> of a phrase and prints it on screen.  I'm having problems with it.
> I'm thinking a for loop would be good since I don't know the exact
> number of words the user is going to enter, but after that I get
> confused.  How do I tell python to just goto the beg of each word in
> the phrase and include it in the acronym?  Am I on the right track?
>
>    for a in string.split(phrase)
>    acronym = phrase [0]
>    acronym = acronym + 1


How about:

for a in phrase.split():
    print a[0]





From bbxx789_05ss at yahoo.com  Thu Sep 20 15:17:00 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Thu, 20 Sep 2007 12:17:00 -0700
Subject: subprocess: returncode v. poll()
Message-ID: <1190315820.532320.26570@22g2000hsm.googlegroups.com>

Hi,

What is the difference between:

1) getting the returncode directly from the subprocess object
2) calling poll() on the subprocess object?

Here is an example:


import subprocess

p = subprocess.Popen("ls", stdout=subprocess.PIPE)
print p.returncode
print p.poll()
print

print p.stdout.read()[:5]
print

print p.returncode
print p.poll()
print p.returncode


--output:--
None
None

10tes

None
0
0



From ricaraoz at gmail.com  Sat Sep  8 17:32:45 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Sat, 08 Sep 2007 18:32:45 -0300
Subject: Spell-checking Python source code
In-Reply-To: <1189285495.185657.88010@o80g2000hse.googlegroups.com>
References: <1189285495.185657.88010@o80g2000hse.googlegroups.com>
Message-ID: <46E314FD.7030200@bigfoot.com>

John Zenger wrote:
> To my horror, someone pointed out to me yesterday that a web app I
> wrote has been prominently displaying a misspelled word.  The word was
> buried in my code.
> 
> Is there a utility out there that will help spell-check literal
> strings entered into Python source code?  I don't mean spell-check
> strings entered by the user; I mean, go through the .py file, isolate
> strings, and tell me when the strings contain misspelled words.  In an
> ideal world, my IDE would do this with a red wavy line.
> 
> I guess a second-best thing would be an easy technique to open a .py
> file and isolate all strings in it.
> 
> (I know that the better practice is to isolate user-displayed strings
> from the code, but in this case that just didn't happen.)
> 

Use the re module, identify the strings and write them to another file,
then open the file with your spell checker. Program shouldn't be more
than 10 lines.





From robin at alldunn.com  Fri Sep 28 01:08:27 2007
From: robin at alldunn.com (Robin Dunn)
Date: Thu, 27 Sep 2007 22:08:27 -0700
Subject: ANNOUNCE: wxPython 2.8.6.0
Message-ID: <46FC8C4B.8000808@alldunn.com>

Announcing
----------

The 2.8.6.0 release of wxPython is now available for download at
http://wxpython.org/download.php.  This release is mostly about fixing
a number of bugs and inconsistencies in wxWidgets and wxPython.

Source code is available, as well as binaries for Python 2.3, 2.4 and
2.5, for Windows and Mac, as well some pacakges for various Linux
distributions.  A summary of changes is listed below and also at
http://wxpython.org/recentchanges.php.


What is wxPython?
-----------------

wxPython is a GUI toolkit for the Python programming language. It
allows Python programmers to create programs with a robust, highly
functional graphical user interface, simply and easily. It is
implemented as a Python extension module that wraps the GUI components
of the popular wxWidgets cross platform library, which is written in
C++.

wxPython is a cross-platform toolkit. This means that the same program
will usually run on multiple platforms without modifications.
Currently supported platforms are 32-bit Microsoft Windows, most Linux
or other Unix-like systems using GTK2, and Mac OS X 10.3+, in most
cases the native widgets are used on each platform to provide a 100%
native look and feel for the application.


Changes in 2.8.6.0
------------------

This release is mostly about fixing a number of bugs and
inconsistencies in wxWidgets and wxPython.  In other words, there have
been a whole lot more changes than what is listed here, but they are
not new features or API visible changes, which is what are usually
listed in this file.

Some Menu APIs added to make things more consistent.  Added
wx.MenuBar.SetMenuLabel, wx.MenuBar.GetMenuLabel,
wx.MenuBar.GetMenuLabelText, wx.Menu.GetLabelText,
wx.MenuItem.SetItemLabel, wx.MenuItem.GetItemLabel,
wx.MenuItem.GetItemLabelText, wx.MenuItem.GetLabelText.  The
Get...Label functions get the raw label with mnemonics and
accelerators, and the Get...LabelText functions get the text only,
without mnemonics/accelerators.

Added wx.BORDER_THEME style.  This style will attempt to use a theme
specific style, if the current platform and environment is themeable
and has a specific theme style.  For example, you could use this on
Windows XP on a custom control to give it a themed border style that
looks like what is used by default on the native wx.TextCtrl or
wx.ListBox.  Since there were not any more available bits for border
styles, this style replaces wx.BORDER_DOUBLE.

-- 
Robin Dunn
Software Craftsman
http://wxPython.org  Java give you jitters?  Relax with wxPython!



From arkanes at gmail.com  Fri Sep  7 10:55:28 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Fri, 7 Sep 2007 09:55:28 -0500
Subject: Best practice prompting for password
In-Reply-To: <46E14CF1.8090706@gentlemail.com>
References: <46E14CF1.8090706@gentlemail.com>
Message-ID: <4866bea60709070755i3602eac4se2a47d9211526b6a@mail.gmail.com>

On 9/7/07, GiBo <gibo at gentlemail.com> wrote:
> Hi,
>
> what's the best practice to securely prompt user for password on console
> in Python? IIRC some programs like SSH do a lot to ensure that the input
> comes from TTY and is not redirected from somewhere and several other
> checks. In the case of OpenSSH even the password prompt is always
> displayed regardless if the output is redirected to a file or not.
>
> Any pointers to best practice or code snippet of python password prompt?
>

The getpass module.


From gagsl-py2 at yahoo.com.ar  Mon Sep 17 21:58:59 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 17 Sep 2007 22:58:59 -0300
Subject: Entering strings as user input but interpreting as Python input
	(sort of)
References: <fcn4h302ikb@news2.newsguy.com>
Message-ID: <op.tytuglolx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 17 Sep 2007 21:01:38 -0300, Chris Carlen  
<crcarleRemoveThis at BOGUSsandia.gov> escribi?:

> I'm writing a Python program, a hex line editor, which takes in a line
> of input from the user such as:
>
>  >>> cmd = raw_input('-').split()
> -e 01 02 "abc def" 03 04
>  >>> cmd
> ['e', '01', '02', '"abc', 'def"', '03', '04']
>
> Trouble is, I don't want to split the quoted part where the space occurs.

For this, try using the shlex module  
<http://docs.python.org/lib/module-shlex.html>
The cmd module may be useful too, so you can concentrate on your own  
functions, not the framework: <http://docs.python.org/lib/module-cmd.html>

-- 
Gabriel Genellina



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Sep  6 10:23:59 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 06 Sep 2007 16:23:59 +0200
Subject: startswith( prefix[, start[, end]])  Query
In-Reply-To: <1189087752.538726.101350@r29g2000hsg.googlegroups.com>
References: <1189087752.538726.101350@r29g2000hsg.googlegroups.com>
Message-ID: <46e00d7e$0$16413$426a74cc@news.free.fr>

cjt22 at bath.ac.uk a ?crit :
> Hi
> 
> startswith( prefix[, start[, end]])  States:
> 
> Return True if string starts with the prefix, otherwise return False.
> prefix can also be a tuple of suffixes to look for. However when I try
> and add a tuple of suffixes I get the following error:
> 
> Type Error: expected a character buffer object
> 
> For example:
> 
> file = f.readlines()
> for line in file:

slightly OT, but:
1/ you should not use 'file' as an identifier, it shadowas the builtin 
file type
2/ FWIW, it's also a pretty bad naming choice for a list of lines - why 
not just name this list 'lines' ?-)
3/ anyway, unless you need to store this whole list in memory, you'd be 
better using the iterator idiom (Python files are iterables):

f = open('some_file.ext')
for line in f:
   print line


>     if line.startswith(("abc","df"))
>         CODE
> 
> It would generate the above error

May I suggest that you read the appropriate version of the doc ? That 
is, the one corresponding to your installed Python version ?-)

Passing a tuple to str.startswith is new in 2.5. I bet you're trying it 
on a 2.4 or older version.

> To overcome this problem, I am currently just joining individual
> startswith methods
> i.e. if line.startswith("if") or line.startswith("df")
> but know there must be a way to define all my suffixes in one tuple.

You may want to try with a regexp, but I'm not sure it's worth it (hint: 
the timeit module is great for quick small benchmarks).

Else, you could as well write your own testing function:

def str_starts_with(astring, *prefixes):
   startswith = astring.startswith
   for prefix in prefixes:
     if startswith(prefix):
       return true
   return false

for line in f:
   if str_starts_with(line, 'abc, 'de', 'xxx'):
     # CODE HERE

HTH


From tim.couper at scivisum.co.uk  Tue Sep  4 09:53:46 2007
From: tim.couper at scivisum.co.uk (Tim Couper)
Date: Tue, 04 Sep 2007 14:53:46 +0100
Subject: Setting Current Dir in Python
In-Reply-To: <fbjmci$dig$1@sea.gmane.org>
References: <000001c7eeec$d9341470$8b9c3d50$@net>	<46DD5135.7060501@scivisum.co.uk>
	<fbjmci$dig$1@sea.gmane.org>
Message-ID: <46DD636A.7090209@scivisum.co.uk>

Steve

Of course it is. I'd like to think I left a test for the observant, but 
in reality it just shows I can't copy-type  ... :-)

Tim


Dr Tim Couper
CTO, SciVisum Ltd

www.scivisum.com



Steve Holden wrote:
> Tim Couper wrote:
>   
>> "Non-ASCII character '\xef' in file"
>>
>> SandhirFileMonitor.py on line 356, 
>>
>> This is reason for the failure .. you have a (probably accidentally placed) non-ascii (ie whose value is > 128) character on line 356, whose hex value is ef (decimal 259) . Solution: find that line and remove the character - or line.
>>
>>     
> Tim:
>
> You should know that any two-digit hexadecimal number is less than 255!
>
>  >>> int("ef", 16)
> 239
>
> regards
>   Steve
>   


From richardjones at optushome.com.au  Fri Sep 21 22:42:17 2007
From: richardjones at optushome.com.au (Richard Jones)
Date: Sat, 22 Sep 2007 12:42:17 +1000
Subject: Registration for OSDC 2007 is open
Message-ID: <200709221242.17442.richardjones@optushome.com.au>

OSDC 2007 is in Brisbane this year on 27-29 November (with a tutorial day on 
the 26th). $275 early bid registration closes October 14th.

Just follow the instructions at the top of http://osdc.com.au/registration/ to 
1. register and 2. pay. (If you are going to pay by credit card/PayPal you 
should note the OS7xxxxx invoice number that the registration process 
allocates you and re-enter that when you pay.)


    Richard


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Sep  5 10:43:02 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 05 Sep 2007 16:43:02 +0200
Subject: handling modules in packages
In-Reply-To: <mailman.89.1189001226.2658.python-list@python.org>
References: <619B716A-C1EB-42DF-9702-E288AD04F613@mac.com>	<fbmbp3$nm8$1@sea.gmane.org>
	<mailman.89.1189001226.2658.python-list@python.org>
Message-ID: <46dec070$0$25029$426a74cc@news.free.fr>

Tommy Grav a ?crit :
(snip)
 >
> So am I understanding it right that a second import numpy statement
> in a different module (and thus a different namespace) just results in
> a binding to the already existing numpy "object"?

Yes.

And FWIW, you can drop the quotes around the word 'object', because 
Python's modules *are* objects:

Python 2.5.1 (r251:54863, May  2 2007, 16:56:35)
[GCC 4.1.2 (Ubuntu 4.1.2-0ubuntu4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> import sys
 >>> sys.__class__
<type 'module'>
 >>>


HTH


From a.schmolck at gmail.com  Wed Sep  5 08:48:02 2007
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: Wed, 05 Sep 2007 13:48:02 +0100
Subject: Calling a matlab script from python
References: <1188978068.544030.158010@19g2000hsx.googlegroups.com>
Message-ID: <yfstzq96zy5.fsf@gmail.com>

n o s p a m p l e a s e <nospam.please at alum.com> writes:

> Suppose I have a matlab script mymatlab.m. How can I call this script
> from a python script?

You could use <http://mlabwrap.sourceforge.net/>.

'as


From sajmikins at gmail.com  Mon Sep 17 02:12:40 2007
From: sajmikins at gmail.com (Simon Forman)
Date: Mon, 17 Sep 2007 06:12:40 -0000
Subject: Tkinter pack difficulty
In-Reply-To: <rowen-B40CB5.12150412092007@gnus01.u.washington.edu>
References: <1189617737.700363.187450@g4g2000hsf.googlegroups.com>
	<rowen-B40CB5.12150412092007@gnus01.u.washington.edu>
Message-ID: <1190009560.393700.170690@w3g2000hsg.googlegroups.com>

Thanks everyone for the incredibly helpful replies!  I got the effect
I wanted, no problem.  I don't know why I didn't think to remove the
expand option.  I thought the sticky option would constrain the
expansion.

Thanks again,
~Simon



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Sep 17 10:15:04 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 17 Sep 2007 16:15:04 +0200
Subject: Saving parameters between Python applications?
In-Reply-To: <1189969538.830532.98840@g4g2000hsf.googlegroups.com>
References: <1189969538.830532.98840@g4g2000hsf.googlegroups.com>
Message-ID: <46ee8be6$0$14822$426a74cc@news.free.fr>

Stodge a ?crit :
> I'm trying to do the following. I have a Python application that is
> run:
> 
> python app1.py --location=c:\test1
> 
> What I want to do is save the location parameter, so I can then do (in
> the same window):
> 
> python app2.py
> 
> And have app2.py automatically have access to the value of "location".
> 
> Now, the difficult part is, that in another window I want to do:
> 
> python app1.py --location=c:\test2
> python app2.py
> 
> And have app2.py automatically get c:\test2 as the location. So the
> two windows (consoles) are isolated from each other.
> 
> I thought I could use os.environ, but that doesn't save the variable
> for applications that are run afterwards in the same window.
> 
> Any suggestions?

Yes : pass the same arg to both app1.py and app2.py !-)

Braindead, I know, but still the simplest solution.




From aleax at mac.com  Thu Sep 13 11:23:07 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 13 Sep 2007 08:23:07 -0700
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<87sl5j5r34.fsf@benfinney.id.au>
	<1189646281.569796.267940@d55g2000hsg.googlegroups.com>
	<87ir6f5mrq.fsf@benfinney.id.au>
	<1189651204.408268.57580@19g2000hsx.googlegroups.com>
Message-ID: <1i4dddf.piaojwz9lz40N%aleax@mac.com>

TheFlyingDutchman <zzbbaadd at aol.com> wrote:

> >     >>> Foo.bar(foo, "spam")
> >     >>> foo.bar("spam")
> 
> That looks like a case of "There's more than one way to do it". ;)
> The first form is definitely consistent with the
> method declaration, so there's a lot to be said for using that style
> when teaching people to make classes -> send self, receive self.

On the other hand, the second form is not polymorphic: it doesn't allow
for foo to be an instance of some OTHER class (possibly subclassing Foo
and overriding bar) -- it will call the Foo version of bar anyway.

type(foo).bar(foo, "spam") *IS* almost semantically equivalent to the
obviousy simpler foo.bar("spam") -- but doesn't cover the possibility
for foo to do a *per-instance* override of 'bar'.

getattr(foo, 'bar', functools.partial(type(foo).bar, foo))("spam") is
getting closer to full semantic equivalence.  And if you think that's
"another OBVIOUS way of doing it" wrt foo.bar("spam"), I think your
definition of "obvious" may need a reset (not to mention the fact that
the "equivalent" version is way slower;-).

Foo.bar(foo, "spam")'s different semantics are important when any
implementation of type(foo).bar (or other method yet) wants to BYPASS
polymorphism to redirect part of the functionality to a specific type's
implementation of bar ('super' may help in some cases, but it keeps some
polymorphic aspects and pretty often you just want to cut all
polymorphism off and just redirect to ONE specific implementation).


Alex


From svenn.bjerkem at googlemail.com  Wed Sep 26 16:49:10 2007
From: svenn.bjerkem at googlemail.com (Svenn Are Bjerkem)
Date: Wed, 26 Sep 2007 20:49:10 -0000
Subject: Script to extract text from PDF files
In-Reply-To: <1190747931.415834.75670@n39g2000hsh.googlegroups.com>
References: <fdbh95$smc$1@solaris.cc.vt.edu>
	<1190746968.162359.39890@r29g2000hsg.googlegroups.com>
	<1190747931.415834.75670@n39g2000hsh.googlegroups.com>
Message-ID: <1190839750.537205.193110@d55g2000hsg.googlegroups.com>

On Sep 25, 9:18 pm, byte8b... at gmail.com wrote:
> On Sep 25, 3:02 pm, Paul Hankin <paul.han... at gmail.com> wrote:
>
> > Googling for 'pdf to text python' and following the first link giveshttp://pybrary.net/pyPdf/
>
> Doesn't work that well, I've tried it, you should too... the author
> even admits this:
>
> extractText() [#]
>
>     Locate all text drawing commands, in the order they are provided
> in the content stream, and extract the text. This works well for some
> PDF files, but poorly for others, depending on the generator used.
> This will be refined in the future. Do not rely on the order of text
> coming out of this function, as it will change if this function is
> made more sophisticated. - sourcehttp://pybrary.net/pyPdf/pythondoc-pyPdf.pdf.html

I have downloaded this package and installed it and found that the
text-extraction is more or less useless. Looking into the code and
comparing with the PDF spec show a very early implementation of text
extraction. Luckily it is possible to overwrite the textextraction
method in the base class without having to fiddle with the original
code. I tried to contact the developer to offer some help on
implementing text extraction, but he didn't answer my emails.
--
Svenn



From jjl at pobox.com  Thu Sep 20 15:27:51 2007
From: jjl at pobox.com (John J. Lee)
Date: Thu, 20 Sep 2007 19:27:51 GMT
Subject: UTF-8 characters in doctest
References: <1190202459.229197.297350@n39g2000hsh.googlegroups.com>
	<fcr3u9$l32$03$2@news.t-online.com>
Message-ID: <878x71jfwo.fsf@pobox.com>

Peter Otten <__peter__ at web.de> writes:
[...]
> # -*- coding: utf8 -*-
> r"""
>>>> f("???".decode("utf8"))
> (u'\xe4\xf6\xfc',)
> """
> def f(s):
>     return (s,)

Forgive me if this is a stupid question, but: What purpose does
function f serve?


John


From mail at microcorp.co.za  Sat Sep  1 04:46:54 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 1 Sep 2007 10:46:54 +0200
Subject: list index() (OT)
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com><46d674c2$0$417$426a34cc@news.free.fr><1188496588.750629.208100@g4g2000hsf.googlegroups.com><1188497498.3468.60.camel@dot.uniqsys.com><021801c7eba2$ad429640$03000080@hendrik>	<1cnfd31du01el95u70o8mjn9cb5r5aluiu@4ax.com><007f01c7ec65$605e6700$03000080@hendrik>
	<fbb35i$3co$2@sea.gmane.org>
Message-ID: <026301c7ec75$087eb980$03000080@hendrik>

 "Steve Holden" <s...web.com> wrote:


> Where's Godwin's Law when yo need it?

Hitler would not have spellt "you" like that...

- Hendrik



From bj_666 at gmx.net  Thu Sep 13 02:55:56 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 13 Sep 2007 06:55:56 GMT
Subject: python & osgi
References: <1189645993.968565.313760@57g2000hsv.googlegroups.com>
Message-ID: <5ks57sF57ml9U1@mid.uni-berlin.de>

On Wed, 12 Sep 2007 18:13:13 -0700, Andreas Wapf wrote:

> Is there something like a osgi implementation in python? I am really
> impressed by the bundle system and the possibility to load and unload
> bundles without wasting memory.

I'm really impressed by the about 1000 pages OSGi specification.  8-)

> Is it even possible to do something like that in python? Would be nice to
> have a very small python interpreter and just load the modules as needed.

Modules are only loaded as you import them, so you can make it as "lazy"
as you want.  I don't know if it's possible to unload them again.  But is
code really a memory problem?  I've never thought "OMG memory is getting
low, I wish I could unload a module to get some space."  In my experience
it's always data that eats my RAM.

Ciao,
	Marc 'BlackJack' Rintsch


From grante at visi.com  Sat Sep 15 12:07:07 2007
From: grante at visi.com (Grant Edwards)
Date: Sat, 15 Sep 2007 16:07:07 -0000
Subject: how to join array of integers?
References: <1189859762.563599.269270@g4g2000hsf.googlegroups.com>
	<a23effaf0709150551g19c611eqe1c912acf02306d3@mail.gmail.com>
	<mailman.577.1189864628.2658.python-list@python.org>
Message-ID: <13eo0pbiab4spdf@corp.supernews.com>

On 2007-09-15, Arnau Sanchez <arnau at ehas.org> wrote:

>>> in Python... is the method to use ",".join() ?  but then it
>>> must take a list of strings... not integers...
>>>
>>> any fast method?
>
> > print ''.join([str(i) for i in [1,2,3]])
>
> It's better to use generator comprehension instead of LC:
>
> ",".join(str(i) for i in [1, 2, 3])
>
> Or, if you happen to like the itertools modules:
>
> from itertools import imap
> ",".join(imap(str, [1, 2, 3]))

It's nice people have invented so many ways to spell the
builting "map" ;)

>>> ",".join(map(str,[1,2,3]))
'1,2,3'

-- 
Grant Edwards                   grante             Yow!  Thousands of days of
                                  at               civilians... have produced
                               visi.com            a... feeling for the
                                                   aesthetic modules --


From george.sakkis at gmail.com  Sun Sep 30 22:36:23 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: Mon, 01 Oct 2007 02:36:23 -0000
Subject: Using fractions instead of floats
In-Reply-To: <1191202509.853059.222530@k79g2000hse.googlegroups.com>
References: <1191202509.853059.222530@k79g2000hse.googlegroups.com>
Message-ID: <1191206183.441075.167450@57g2000hsv.googlegroups.com>

On Sep 30, 9:35 pm, andresj <andres.j.... at gmail.com> wrote:
> I was doing some programming in Python, and the idea came to my mind: using fractions instead of floats when doing 2/5.
> (...)
> I would like to get some feedback on this idea. Has this been posted
> before? If so, was it rejected? and for what?

Is internet down today ?

http://pypi.python.org/pypi/clnum/1.2
http://www.python.org/dev/peps/pep-0239/

George



From bbxx789_05ss at yahoo.com  Sat Sep 15 17:27:13 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sat, 15 Sep 2007 14:27:13 -0700
Subject: curses: x, y positioning
Message-ID: <1189891633.622313.81850@r29g2000hsg.googlegroups.com>

I can't see to get any y, x coordinates to work with curses.  Here is
an example:

import curses

def my_program(screen):
    while True:
        ch = screen.getch()
        if ch == ord("q"):
            break
        if ch <= 255:
            screen.addstr(30, 10, "*%s*" % chr(ch))
            screen.refresh()

curses.wrapper(my_program)

Here is the result:

Traceback (most recent call last):
  File "2pythontest.py", line 12, in ?
    curses.wrapper(my_program)
  File "/Library/Frameworks/Python.framework/Versions/2.4//lib/
python2.4/curses/wrapper.py", line 44, in wrapper
    return func(stdscr, *args, **kwds)
  File "2pythontest.py", line 9, in my_program
    screen.addstr(30, 10, "*%s*" % chr(ch))
_curses.error: addstr() returned ERR



From rschroev_nospam_ml at fastmail.fm  Tue Sep 25 08:36:54 2007
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Tue, 25 Sep 2007 12:36:54 GMT
Subject: Newbie completely confused
In-Reply-To: <s15Ki.122826$Mk7.5894272@phobos.telenet-ops.be>
References: <mailman.876.1190392492.2658.python-list@python.org>	<IE4Ji.117838$pR1.5801002@phobos.telenet-ops.be>
	<mailman.997.1190649060.2658.python-list@python.org>
	<s15Ki.122826$Mk7.5894272@phobos.telenet-ops.be>
Message-ID: <Gh7Ki.123009$2a5.5774496@phobos.telenet-ops.be>

Roel Schroeven schreef:
> import time
> 
> input_files = ["./test_file0.txt", "./test_file1.txt"]
> 
> total_start = time.time()
> data = {}
> for input_fn in input_files:
>      file_start = time.time()
>      f = file(input_fn, 'r')
>      data[input_fn] = f.read()
>      f.close()
>      file_done = time.time()
>      print '%s: %f to read %d bytes' % (input_fn, file_done - 
> file_start, len(data))

... that should of course be len(data[input_fn]) ...

> total_done = time.time()
> print 'all done in %f' % (total_done - total_start)
> 
> 
> When I run that with test_file0.txt and test_file1.txt as you described 
> (each 30 MB), I get this output:
> 
> ./test_file0.txt: 0.260000 to read 1 bytes
> ./test_file1.txt: 0.251000 to read 2 bytes
> all done in 0.521000

... and then that becomes:

./test_file0.txt: 0.290000 to read 33170000 bytes
./test_file1.txt: 0.231000 to read 33170000 bytes
all done in 0.521000


-- 
The saddest aspect of life right now is that science gathers knowledge
faster than society gathers wisdom.
   -- Isaac Asimov

Roel Schroeven


From gagsl-py2 at yahoo.com.ar  Wed Sep 26 02:57:18 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 26 Sep 2007 03:57:18 -0300
Subject: the address of list.append and list.append.__doc__
References: <1190775258.351819.24930@22g2000hsm.googlegroups.com>
	<mailman.1077.1190776788.2658.python-list@python.org>
	<1190780557.879816.13800@d55g2000hsg.googlegroups.com>
	<mailman.1083.1190785973.2658.python-list@python.org>
	<1190788149.477809.80130@g4g2000hsf.googlegroups.com>
Message-ID: <op.ty81lsijx6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 26 Sep 2007 03:29:09 -0300, HYRY <ruoyu0088 at gmail.com> escribi?:

> I want to add a docstring translator into the Python interpreter. If
> the user input:
>>>> a = [1,2,3]
>>>> a.append(
> this translator will show the docstring of append in my native
> language. Because __doc__ is read only, I added a dict to the
> interpreter as follows:
>
> DOC[list.append.__doc__] = """ translated version of the __doc__ """
>
> When it is the time to show docstring, the program get the translated
> version from DOC.
> This works, but I think the key of DOC is too long, so I want to use
> the id of list.append.__doc__ as the key; or use the id of
> list.append:

Don't worry about that. There is no "wasted memory" apart from some  
overhead due to the string object itself (a few bytes per string, fixed  
and not depending on the string length).
Just use the __doc__ as the dictionary key. Perhaps using an external  
database, to avoid keeping all the translated texts in memory.

-- 
Gabriel Genellina



From iclark at mail.ewu.edu  Fri Sep 14 16:46:35 2007
From: iclark at mail.ewu.edu (Ian Clark)
Date: Fri, 14 Sep 2007 13:46:35 -0700
Subject: subclass of integers
In-Reply-To: <1189780201.692192.291010@k79g2000hse.googlegroups.com>
References: <1189780201.692192.291010@k79g2000hse.googlegroups.com>
Message-ID: <fcervb$da5$1@sea.gmane.org>

Mark Morss wrote:
> I would like to construct a class that includes both the integers and
> None.  I desire that if x and y are elements of this class, and both
> are integers, then arithmetic operations between them, such as x+y,
> return the same result as integer addition.  However if either x or y
> is None, these operations return None.
> 
> It's simple enough to construct a subclass of integers that behave in
> this way:
> 
> class Nint(int):
>     def __add__(self,other):
>         if (other != None):
>             return self+other
>         else:
>             return None
>     def __radd__(self,other):
>         if (other != None):
>             return other+self
>         else:
>             return None
>     #...and so forth
> 
> However I have not been able to figure out how to make it so that
> None, as well as an integer, could be an element of my class.  My
> preliminary impression is that I have to override int.__new__; but I
> am uncertain how to do that and have been unable to find anything on
> the web explaining that.  Indeed I haven't been able to find much
> about __new__ at all.  Overriding this method of built-in classes
> seems to be quite unusual.
> 
> I would very much appreciate anyone's help.

My thought would be rather than trying to cram None into a subclass of 
int, to use delegation instead...

-----8<--------------------------------------------------
class NoneInt(object):
     def __init__(self, value):
         self.value = value

     def __add__(self, other):
         if isinstance(other, NoneInt):
             if None in (self.value, other.value):
                 return NoneInt(None)
             return NoneInt(self.value + other.value)
         elif isinstance(other, int):
             if self.value is None:
                 return NoneInt(None)
             return NoneInt(self.value + other)
         else:
             raise TypeError(
                 "unsupported operand type(s) for +: 'NoneInt'"
                 "and '%s'" % str(other.__class__.__name__)
             )
     __radd__ = __add__

     def __str__(self):
         return 'NoneInt(%s)' % str(self.value)


def main():
     print '42? ', NoneInt(40) + NoneInt(2)
     print '41? ', NoneInt(40) + 1
     print '40? ', 25 + NoneInt(15)
     print 'None? ', NoneInt(None)
     print 'None? ', NoneInt(None) + 1
     print 'None? ', 1 + NoneInt(None)
     print 'Error? ', NoneInt(0) + 'spam'

if __name__ == '__main__':
     main()
-----8<--------------------------------------------------

Ian



From cjt22 at bath.ac.uk  Tue Sep  4 10:52:30 2007
From: cjt22 at bath.ac.uk (cjt22 at bath.ac.uk)
Date: Tue, 04 Sep 2007 07:52:30 -0700
Subject: Printing lists in columns
In-Reply-To: <46dd69b1$0$24998$426a74cc@news.free.fr>
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<mailman.315.1188810174.28954.python-list@python.org>
	<46dbd11e$0$6228$426a74cc@news.free.fr>
	<mailman.317.1188812089.28954.python-list@python.org>
	<1188816626.021956.281040@22g2000hsm.googlegroups.com>
	<5k2cjmF1r2aiU1@mid.uni-berlin.de>
	<1188836008.656284.76160@o80g2000hse.googlegroups.com>
	<46dc6f49$0$6207$426a34cc@news.free.fr>
	<1188900397.459760.259580@k79g2000hse.googlegroups.com>
	<slrnfdqe3t.i4p.hat@se-162.se.wtb.tue.nl>
	<Xns99A17FAC2587duncanbooth@127.0.0.1>
	<1188906767.737741.267350@19g2000hsx.googlegroups.com>
	<Xns99A18F8C528BCduncanbooth@127.0.0.1>
	<1188913394.763871.218660@d55g2000hsg.googlegroups.com>
	<46dd69b1$0$24998$426a74cc@news.free.fr>
Message-ID: <1188917550.261894.84010@k79g2000hse.googlegroups.com>

On Sep 4, 3:20 pm, Bruno Desthuilliers <bruno.
42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> cj... at bath.ac.uk a ?crit :
> (snip)
>
> > Thanks guys
>
> > I have a list of lists such as
> >  a = ["1" , "2"]  b = ["4", "5", "6"]  c = ["7",8", "9"]
> > Stored in another list: d = [a,b,c]
>
> > I know this makes me sound very stupid but how would I specify
> > in the parameter the inner lists without having to write them all out
> > such as:
>
> > for row in izip_longest(d[0], d[1], d[2], fillvalue='*'):
> >     print ', '.join(row)
>
> > i.e. How could I do the following if I didn't know how many list of
> > lists I had.
>
> for row in izip_longest(*d, fillvalue='*'):
>      print ', '.join(row)
>
> HTH

I thought that but when I tried it I recieved a
"Syntax Error: Invalid Syntax"
with a ^ pointing to fillvalue :S



From joel.schaerer at gmail.com  Thu Sep 27 09:31:22 2007
From: joel.schaerer at gmail.com (Joel)
Date: Thu, 27 Sep 2007 06:31:22 -0700
Subject: Cross-platform time out decorator
In-Reply-To: <1190802115.585306.250400@o80g2000hse.googlegroups.com>
References: <1190802115.585306.250400@o80g2000hse.googlegroups.com>
Message-ID: <1190899882.702911.44670@w3g2000hsg.googlegroups.com>

On Sep 26, 12:21 pm, Joel <joel.schae... at gmail.com> wrote:
> I've been using this nice timing out decorator :http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/307871. The
> problem is that since it relies on sigalarm, it doesn't work under
> windows. Would anyone know how to do a cross-platform version?
>
> Thanks a lot!
>
> joel

I found the solution : http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/440569
describes a solution based on threads. I tested it and it works
perfectly.



From manuel.graune at koeln.de  Mon Sep 24 12:55:45 2007
From: manuel.graune at koeln.de (Manuel Graune)
Date: Mon, 24 Sep 2007 18:55:45 +0200
Subject: An Editor that Skips to the End of a Def
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87odfxjgjy.fsf@pobox.com> <fd033u$bnc$1@lust.ihug.co.nz>
	<3Md*NJqVr@news.chiark.greenend.org.uk>
	<m3hcll72wx.fsf@uriel.graune.org> <fd789c$clc$1@lust.ihug.co.nz>
Message-ID: <m364206m0e.fsf@uriel.graune.org>

Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> writes:

> In message <m3hcll72wx.fsf at uriel.graune.org>, Manuel Graune wrote:
>
>> Matthew Woodcraft <mattheww at chiark.greenend.org.uk> writes:
>> 
>>> Lawrence D'Oliveiro  <ldo at geek-central.gen.new_zealand> wrote:>
>>>
>>>> <http://www.asktog.com/SunWorldColumns/S02KeyboardVMouse3.html>
>>>
>> And "cursor keys"? Please, every self respecting editor has ways for
>> moving around quite a bit more efficiently.
>> 
>> And on top of that a use case, which no one in his right mind would
>> do this way. Accomplishing this task with search-and-replace would
>> have taken about 10 seconds. With Mouse or Keyboard.
>
> Just to reinforce the point that the above was in no way an artificial or
> isolated case:
>
> <http://www.asktog.com/TOI/toi06KeyboardVMouse1.html>
> <http://www.asktog.com/TOI/toi22KeyboardVMouse2.html>

Without knowing more about the design of those studies, further
discussion is kind of pointless. I would really like to see a comparison
of "mouse-centered IDEs" (e. g. Eclipse) vs. "keyboard-centered IDEs"
(e. g. Emacs). used for some small progamming task (and not isolated
editing problems). For one thing, most programmers more or less
<quote>
are not normal people. We tend to have superior memories, we actually
grasp boolean logic, we have formed priesthoods around the most
egregious interfaces, and we have a firm belief that the average citizen
is in search of an editor for his daily C and Pascal coding tasks.

We are not firmly rooted in the real world.
</quote>

So I'm not really concerned about the first-time user, for which without
a doubt a mouse-based user-interface is easier (and probably faster). I
need an editor/IDE I feel comfortable with after using it for a
month or longer. And for the record: Being subjectively faster is good
enough for me. I don't really care if I could have saved 15 minutes at
the end of the day with the objectively faster interface, if I don't
feel slowed down.  

But since this is not a usability-NG and I originally just wanted to
point out that the specific example is far from ideal, I won't
continue this discussion in this NG. If you want to, you can contact me
by mail.

Regards,

Manuel


-- 
A hundred men did the rational thing. The sum of those rational choices was
called panic. Neal Stephenson -- System of the world
http://www.graune.org/GnuPG_pubkey.asc
Key fingerprint = 1E44 9CBD DEE4 9E07 5E0A  5828 5476 7E92 2DB4 3C99


From mastro.francesco at gmail.com  Thu Sep 27 09:12:40 2007
From: mastro.francesco at gmail.com (mastro.francesco at gmail.com)
Date: Thu, 27 Sep 2007 06:12:40 -0700
Subject: Mysqldb & stderr
Message-ID: <1190898760.854246.51690@n39g2000hsh.googlegroups.com>

developing a daemon (using python 2.4 and mysqldb 1.2.1_p2) we notes
that mysqldb class write on stderr some warnings and error
asyncronously (uhmmm.... it's good written? ;P ).
If stderr is closed these function raise up an I/O error (obviously).
We spent a lot of time to understand
for now we redirected stderr on /dev/null, but.. it's a workaround.

Someone knows how stop write on stderr (and stdout) on mysqldb?


Thanks.



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Sep 11 10:46:10 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 11 Sep 2007 16:46:10 +0200
Subject: newbie: stani's python editor if-else
In-Reply-To: <mailman.381.1189514109.2658.python-list@python.org>
References: <1189484688.520933.25000@22g2000hsm.googlegroups.com>
	<mailman.381.1189514109.2658.python-list@python.org>
Message-ID: <46e6aa30$0$22433$426a74cc@news.free.fr>

Steve Holden a ?crit :
> madzientist wrote:
>> hi,
>>
>> two quick questions:
>>
>> a) i am using SPE (latest version) and for some reason, when i type,
>> say
>>
>> if 1==2:
>>     print "not equal"
>>     else:
>>           print "equal"
>>
>> the else is at the same indentation level as the preceding print
>> statement, and i get a syntax error
>>
>> why doesn't spe automatically put the else at the level of the if
>> statement ? 
(snip)
> 
> The point here is that SPE isn't analyzing your source in sufficient 
> detail to recognize the need to "outdent" the else statement. Clearly 
> there could be any number of statements at the same indent level as the 
> first print statement.
> 
> For the record this is not a behavior restricted to SPE, but also occurs 
> in Wing IDE, PythonWin and Scite, for starters.
> 
> Technically you are correct in the example you give: an IDE could decide 
> to remove one level of indentation, but of course there's always the 
> "dangling else" problem: if one "if" statement is nested inside another 
> one, which indentation level would be appropriate for an "else"?
> 
> Generally speaking, only the programmer can know, and so generally you 
> are left to enforce these issues for yourself.

Emacs does a good job here - FWIW, it solves the "dangling else" problem 
by deindenting one level, then it's up to you to deindent more if 
appropriate. In practice, it turns out to be right most of the times, 
and not a problem in the few special cases.


From wizzardx at gmail.com  Wed Sep 12 06:20:47 2007
From: wizzardx at gmail.com (David)
Date: Wed, 12 Sep 2007 12:20:47 +0200
Subject: MemoryError on reading mbox file
In-Reply-To: <1189589259.662667.149730@w3g2000hsg.googlegroups.com>
References: <1189589259.662667.149730@w3g2000hsg.googlegroups.com>
Message-ID: <18c1e6480709120320k1f83a040r2e4138f4c95f880f@mail.gmail.com>

>
> My system has 512M RAM and 768M swap, which seems to run out at an
> early stage of this. Is there a way to clean up memory for messages
> already processed?

It may be that Python's garbage collection isn't keeping up with your app.

You could try periodically forcing it to run. eg:

import gc
gc.collect()

You can also finetune the GC settings and check what is using up your memory.

More info here: http://docs.python.org/lib/module-gc.html


From zzbbaadd at aol.com  Wed Sep 12 21:18:01 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Wed, 12 Sep 2007 18:18:01 -0700
Subject: Python 3K or Python 2.9?
In-Reply-To: <87sl5j5r34.fsf@benfinney.id.au>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<87sl5j5r34.fsf@benfinney.id.au>
Message-ID: <1189646281.569796.267940@d55g2000hsg.googlegroups.com>

On Sep 12, 5:47 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> TheFlyingDutchman <zzbba... at aol.com> writes:
> > I am talking about how an author describes in English the "this"
> > pointer/reference in their book on programming C++ or Java.
>
> > I don't think you will find them saying that under the covers "this"
> > was passed to the method (if in fact it is). They just say that it
> > refers to the current object inside that object's method.
>
> In other words, it's magic, and the behaviour has to be explained so
> the reader knows where the undeclared 'this' comes from.

I would disagree that it _has_ to be explained where it came from. I
think knowing that the compiler is providing it is sufficient. Any
further knowledge of what the compiler is doing under the covers to
provide it is unnecessary. Sun made no mention of where "this" comes
from in that link I provided.

>
> How is that preferable to the magic of "instance is passed as the
> first argument to a method"?

I would mention that an instance is passed as the first parameter
argument of a method if the methods were declared with the extra
argument and called with the extra argument:


a = MyClass()

my_method(a,someParameter)

Then it makes sense to me to talk about it.






From gagsl-py2 at yahoo.com.ar  Sat Sep 29 21:56:56 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 29 Sep 2007 22:56:56 -0300
Subject: Balloon Taskbar Popup for Windows XP
References: <1191062421.610473.13070@19g2000hsx.googlegroups.com>
Message-ID: <op.tzf2c6bsx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 29 Sep 2007 07:40:21 -0300, makko <elmakko at gmail.com> escribi?:

> I need to create a function that will produce a balloon popup in the
> taskbar when called. Whats the shortest and easiest way to do this?

Mark Hammond's pywin32 extensions support notification icons but not  
balloon popups. The Windows NOTIFYICONDATA structure in newer shell  
versions contains more fields, required to show a balloon tooltip, but it  
is incompatible with earlier versions (there are dumb people in MS too...)
Below there is a demo based on win32gui_taskbar.py, using pywin32, ctypes  
and struct. The bulk of code is just to create the window, setup the menu,  
and such. The balloon is shown on this fragment:

     def show_balloon(self):
         # For this message I can't use the win32gui structure because
         # it doesn't declare the new, required fields
         nid = PyNOTIFYICONDATA()
         nid.hWnd = self.hwnd
         nid.uFlags = NIF_INFO
         # type of balloon and text are random
         from random import choice
         nid.dwInfoFlags = choice([NIIF_INFO, NIIF_WARNING, NIIF_ERROR])
         nid.szInfo = choice(["Balloon text.", "This text is nicer.", "Perl  
rulez! :)"])
         nid.szInfoTitle = "A Title"
         # Call the Windows function, not the wrapped one
         from ctypes import windll
         Shell_NotifyIcon = windll.shell32.Shell_NotifyIconA
         Shell_NotifyIcon(NIM_MODIFY, nid.pack())

For more info see the Shell_NotifyIcon docs at  
<http://msdn2.microsoft.com/en-us/library/ms647738.aspx>

<code>
# Based on win32gui_taskbar demo

 from win32api import *
# Try and use XP features, so we get alpha-blending etc.
try:
     from winxpgui import *
except ImportError:
     from win32gui import *
import win32con
import sys, os
import struct
import timer

class PyNOTIFYICONDATA:
     _struct_format = (
         "I" # DWORD cbSize;
         "I" # HWND hWnd;
         "I" # UINT uID;
         "I" # UINT uFlags;
         "I" # UINT uCallbackMessage;
         "I" # HICON hIcon;
         "128s" #    TCHAR szTip[128];
         "I" # DWORD dwState;
         "I" # DWORD dwStateMask;
         "256s" # TCHAR szInfo[256];
         "I" #     union {
             #    UINT  uTimeout;
             #    UINT  uVersion;
             #} DUMMYUNIONNAME;
         "64s" #    TCHAR szInfoTitle[64];
         "I" #  DWORD dwInfoFlags;
         #       GUID guidItem;
     )
     _struct = struct.Struct(_struct_format)

     hWnd = 0
     uID = 0
     uFlags = 0
     uCallbackMessage = 0
     hIcon = 0
     szTip = ''
     dwState = 0
     dwStateMask = 0
     szInfo = ''
     uTimeoutOrVersion = 0
     szInfoTitle = ''
     dwInfoFlags = 0

     def pack(self):
         return self._struct.pack(
             self._struct.size,
             self.hWnd,
             self.uID,
             self.uFlags,
             self.uCallbackMessage,
             self.hIcon,
             self.szTip,
             self.dwState,
             self.dwStateMask,
             self.szInfo,
             self.uTimeoutOrVersion,
             self.szInfoTitle,
             self.dwInfoFlags)

     def __setattr__(self, name, value):
         # avoid wrong field names
         if not hasattr(self, name):
             raise NameError, name
         self.__dict__[name] = value

class MainWindow:
     def __init__(self):
         message_map = {
                 win32con.WM_DESTROY: self.OnDestroy,
                 win32con.WM_COMMAND: self.OnCommand,
                 win32con.WM_USER+20: self.OnTaskbarNotify,
         }
         # Register the Window class.
         wc = WNDCLASS()
         hinst = wc.hInstance = GetModuleHandle(None)
         wc.lpszClassName = "PythonTaskbarDemo"
         wc.lpfnWndProc = message_map # could also specify a wndproc.
         classAtom = RegisterClass(wc)
         # Create the Window.
         style = win32con.WS_OVERLAPPED | win32con.WS_SYSMENU
         self.hwnd = CreateWindow( classAtom, "Taskbar Demo", style, \
                 0, 0, win32con.CW_USEDEFAULT, win32con.CW_USEDEFAULT, \
                 0, 0, hinst, None)
         UpdateWindow(self.hwnd)
         iconPathName = os.path.abspath(os.path.join( sys.prefix, "pyc.ico"  
))
         icon_flags = win32con.LR_LOADFROMFILE | win32con.LR_DEFAULTSIZE
         try: hicon = LoadImage(hinst, iconPathName, win32con.IMAGE_ICON,  
0, 0, icon_flags)
         except: hicon = LoadIcon(0, win32con.IDI_APPLICATION)
         flags = NIF_ICON | NIF_MESSAGE | NIF_TIP
         nid = (self.hwnd, 0, flags, win32con.WM_USER+20, hicon, "Balloon  
tooltip demo")
         Shell_NotifyIcon(NIM_ADD, nid)
         print "Ready. Click on the Python icon."

     def OnTaskbarNotify(self, hwnd, msg, wparam, lparam):
         if lparam==win32con.WM_LBUTTONUP or lparam==win32con.WM_RBUTTONUP:
             print "Click."
             menu = CreatePopupMenu()
             AppendMenu( menu, win32con.MF_STRING, 1024, "Generate balloon")
             AppendMenu( menu, win32con.MF_STRING, 1025, "Exit")
             pos = GetCursorPos()
             SetForegroundWindow(self.hwnd)
             TrackPopupMenu(menu, win32con.TPM_LEFTALIGN, pos[0], pos[1],  
0, self.hwnd, None)
             PostMessage(self.hwnd, win32con.WM_NULL, 0, 0)
             return 1

     def enqueue_balloon(self):
         timer.set_timer(3000, self.show_balloon)
         print "A balloon will appear in 3 sec"

     def show_balloon(self, id, time):
         timer.kill_timer(id) # one-shot timer!

         # For this message I can't use the win32gui structure because
         # it doesn't declare the new, required fields
         nid = PyNOTIFYICONDATA()
         nid.hWnd = self.hwnd
         nid.uFlags = NIF_INFO
         # type of balloon and text are random
         from random import choice
         nid.dwInfoFlags = choice([NIIF_INFO, NIIF_WARNING, NIIF_ERROR])
         nid.szInfo = choice(["Balloon text.", "This text is nicer.", "Perl  
rulez! :)"])
         nid.szInfoTitle = "A Title"
         # Call the Windows function, not the wrapped one
         from ctypes import windll
         Shell_NotifyIcon = windll.shell32.Shell_NotifyIconA
         Shell_NotifyIcon(NIM_MODIFY, nid.pack())

     def OnCommand(self, hwnd, msg, wparam, lparam):
         id = LOWORD(wparam)
         if id == 1024:
             self.enqueue_balloon()
         elif id == 1025:
             print "Goodbye"
             DestroyWindow(self.hwnd)
         else:
             print "OnCommand for ID", id

     def OnDestroy(self, hwnd, msg, wparam, lparam):
         nid = (self.hwnd, 0)
         Shell_NotifyIcon(NIM_DELETE, nid)
         PostQuitMessage(0) # Terminate the app.

def main():
     w=MainWindow()
     PumpMessages()

if __name__=='__main__':
     main()
</code>

-- 
Gabriel Genellina



From iainking at gmail.com  Wed Sep 12 04:59:49 2007
From: iainking at gmail.com (Iain King)
Date: Wed, 12 Sep 2007 08:59:49 -0000
Subject: Difference between two times (working ugly code, needs polish)
In-Reply-To: <mailman.421.1189557069.2658.python-list@python.org>
References: <mailman.405.1189543618.2658.python-list@python.org>
	<13ee01cfc7f4be2@corp.supernews.com>
	<2dc0c81b0709111420r453ac15av6c7aa19473785080@mail.gmail.com>
	<fc73nf$gcq$1@sea.gmane.org>
	<mailman.421.1189557069.2658.python-list@python.org>
Message-ID: <1189587589.085002.34000@19g2000hsx.googlegroups.com>

On Sep 12, 1:31 am, "Shawn Milochik" <Sh... at Milochik.com> wrote:
> > I suppose really oneDay should be a global (i.e. outside the function
> > definition). Apart from that it would be hard to improve on: obvious,
> > easy to read, in short - pythonic.
>
> > Are you concerned about daylight savings? That could certainly introduce
> > a whole new level of complexity into the problem. Let's hope not ...
>
> I'm not concerned with DST; this is a script which checks my Ebay
> auctions (I have some things for sale), and sends me e-mail whenever
> someone bids. It's run by cron every half hour -- it keeps me from
> compulsively checking my auctions. ^_^
>
> In any case, DST isn't an issue because the same machine generates
> both timestamps, and all I use it for is to stop displaying auctions
> after they are 10 days old, so I don't get all my old crap filling up
> the alert e-mail or skewing the total dollar amount for all active
> auctions.
>
> Thanks.
> Shawn

Just to be picky - your function returns the number of days between
two dates, but it's called isOld, which looks like it should return a
boolean.  i.e.  it looks like it would be used as:

if not isOld(auctionDate, currentTime):
    checkForBid()

rather than how I assume it is used:

if isOld(auctionDate, currentTime) <= 10:
    checkForBid()

I'd call it daysDiff or something similar, or make it more specific so
that it works like the first block of code above:

ONEDAY = 60*60*24
OLDNESS_THRESHOLD = 10

def isOld(lastUpdate, runTimeStamp):
    lastUpdate = time.mktime(time.strptime(lastUpdate, "%Y-%m-%d_%H:
%M"))
    runTimeStamp = time.mktime(time.strptime(runTimeStamp, "%Y-%m-%d_
%H:%M"))
    return (runTimeStamp - lastUpdate) / ONEDAY  >=  OLDNESS_THRESHOLD

if not isOld(auctionDate, currentTime):
    checkForBid()

Iain



From afriere at yahoo.co.uk  Mon Sep  3 22:32:13 2007
From: afriere at yahoo.co.uk (Asun Friere)
Date: Mon, 03 Sep 2007 19:32:13 -0700
Subject: Python is overtaking Perl
In-Reply-To: <IrCdnQkp_ds-JEHbnZ2dnUVZ_iydnZ2d@speakeasy.net>
References: <1188865943.238573.218750@w3g2000hsg.googlegroups.com>
	<20070904024908.b8aca60c.sulsa@gazeta.pl>
	<1188869347.102325.119830@w3g2000hsg.googlegroups.com>
	<IrCdnQkp_ds-JEHbnZ2dnUVZ_iydnZ2d@speakeasy.net>
Message-ID: <1188873133.137684.147260@r29g2000hsg.googlegroups.com>

On Sep 4, 11:49 am, Erik Max Francis <m... at alcyone.com> wrote:

> Who knows?  The graph has no labeling or calibration for the y-axis, so
> it's meaningless.
>

Well yes, some calibration would make it more meaningful, but it is at
least labeled 'Search Volume.'  What's worse the calibration changes
with any search you do (try 'java programming, python programming').
In any case this is how Google describe what they are doing.

|Google Trends analyzes a portion of Google web searches to compute
how many
|searches have been done for the terms you enter, relative to the
total number
|of searches done on Google over time. We then show you a graph with
the
|results -- our search-volume graph -- plotted on a linear scale.

So I think we can at least say from the chart that searches combining
the terms 'python' and 'programming' have been falling, by some
unquantifiable amount (it don't _look_ like much!?), relative to the
number of total searches.  I think we can also say that nothing in the
chart implies that the "amount of python programers is smaller every
year."




From bdesth.quelquechose at free.quelquepart.fr  Wed Sep 19 15:23:03 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 19 Sep 2007 21:23:03 +0200
Subject: cannot create my own dict
In-Reply-To: <slrnff260r.43o.hat@se-162.se.wtb.tue.nl>
References: <slrnff260r.43o.hat@se-162.se.wtb.tue.nl>
Message-ID: <46f17743$0$12915$426a34cc@news.free.fr>

A.T.Hofkamp a ?crit :
> Hello all,
> 
> This morning I tried to create my own read-only dictionary, and failed
> miserably.
> I don't understand why, can somebody enlighten me?
> 
> Below is a brute-force experiment that cannot deal with "x in obj", plz read
> the explanation below the code:
> --------------------------------
> class myowndict(object):
>     def __init__(self, mydict):
>         self.mydict = mydict

Why don't you just subclass dict and override the needed method(s) ?

class ReadOnlyDict(dict):
     @classmethod
     def _raise(cls):
         raise AttributeError("%s is read-only" % cls.__name__)

     def __setitem__(self, name, val):
         self._raise()

     def setdefault(self, name, value=None):
         self._raise()

     # TODO : check if I missed some other setter ?

def test(d):
     print d
     try:
         d['c'] = 3
     except AttributeError, e:
         print "__setitem__ ok, got : %s" % e
     else:
         assert('failed on __setitem__')
     try:
         d.setdefault('c', 3)
     except AttributeError, e:
         print "setdefault ok, got : %s" % e
     else:
         assert('failed on setdefault')

if __name__ == '__main__':
     d1 = ReadOnlyDict(a=1, b=2)
     test(d1)

     d2 = ReadOnlyDict({'a':1, 'b':2})
     test(d2)

     d3 = ReadOnlyDict((c, i+1) for i, c in enumerate('ab'))
     test(d3)

    d4 = ReadOnlyDict(**d1)
    test(d4)

NB : works fine so far, but choke on fromkeys, which obviously uses 
__setitem__


> # Below is produced with
> # print '\n'.join(['        self.%s = self.mydict.%s' % (v,v)
> #                                         for v in dir(dict)])
> # commented-out functions done by hand
> #
>         #self.__class__ = self.mydict.__class__
>         self.__cmp__ = self.mydict.__cmp__
>         self.__contains__ = self.mydict.__contains__

(snip lots of useless code)

May I suggest that you learn to use __getattr__ and __setattr__ ?-)

HTH


From nagle at animats.com  Tue Sep 25 13:40:50 2007
From: nagle at animats.com (John Nagle)
Date: Tue, 25 Sep 2007 10:40:50 -0700
Subject: M2Crypto 0.18 - new version, same old build bugs - more details
In-Reply-To: <Ur-dnTfIZcj5M2XbnZ2dnUVZ_hSdnZ2d@comcast.com>
References: <eiAIi.10067$924.3670@newssvr23.news.prodigy.net>
	<xoudna66YI1O5m7bnZ2dnUVZ_umdnZ2d@comcast.com>
	<46F82296.5010701@animats.com>
	<Ur-dnTfIZcj5M2XbnZ2dnUVZ_hSdnZ2d@comcast.com>
Message-ID: <7ybKi.1138$hI7.1043@newssvr17.news.prodigy.net>

Heikki Toivonen wrote:
> John Nagle wrote:
> 
>>But notice that the -D entry didn't appear on the SWIG command line.
>>Neither did the "-includeall".  The "swig_opts" values around line
>>129 aren't actually being used.  I think that's left over from the code
>>intended
>>to allow builds with Python 2.3 and earlier.  The "self.swig_opts" up at
>>line 53 of "setup.py" seems to be controlling.  The patch was to
>>the obsolete code.
> 
> 
> Aha! Good find. I reopened
> https://bugzilla.osafoundation.org/show_bug.cgi?id=9404 and attached a
> patch that should address this for real this time. At least -includeall
> appears in my Ubuntu Dapper Drake environment. Could you give it a go
> and let me know how it works?

    That's progress, but the build still doesn't work:

$ python setup.py build
running build
running build_py
running build_ext
building 'M2Crypto.__m2crypto' extension
swigging SWIG/_m2crypto.i to SWIG/_m2crypto_wrap.c
swig -python -I/usr/local/include/python2.5 -I/usr/include -includeall 
-D__i386__ -o SWIG/_m2crypto_wrap.c SWIG/_m2crypto.i
/usr/include/openssl/opensslconf.h:13: Error: Unable to find 'opensslconf-i386.h'
error: command 'swig' failed with exit status 1

Now that SWIG is being invoked with "-includeall", it has to have
all the include paths defined.  (Without "includeall", includes
are deferred until the C compile stage.) Note that the SWIG command line
specifies "/usr/include", but not "/usr/include/openssl".
Within M2Crypto's SWIG files, there's

    _ec.i:%include <openssl/opensslconf.h>

which brings in "opensslconf.h" from /usr/include/openssl.
But that file has

#if defined(__i386__)
#include "opensslconf-i386.h"
#elif defined(__ia64__)
...

Since "opensslconf-i386.h" lives in /usr/include/openssl,
and that directory isn't mentioned on the SWIG command line,
the #include of "opensslconf-i386.h" fails.

And, no, adding

	self.swig_opts.append('-DOPENSSL_NO_EC')
	# Uncomment if you can't build with EC disabled

does not help.

As a test, I tried adding "-I/usr/include/openssl" to the SWIG command
line.  Building then gets further, but during a C compile, we get

SWIG/_m2crypto_wrap.c:2529:18: error: _lib.h: No such file or directory

and the build goes downhill from there, with many compile errors in the
GCC phase.  The gcc call

gcc -pthread -fno-strict-aliasing -DNDEBUG -g -O3 -Wall -Wstrict-prototypes 
-fPIC -I/usr/local/include/python2.5 -c SWIG/_m2crypto_wrap.c -o 
build/temp.linux-i686-2.5/SWIG/_m2crypto_wrap.o -DTHREADING

is in the directory below SWIG, and doesn't include SWIG, so it's clear
why gcc couldn't find the file.

So those fixes were not enough.  Include file management in the M2Crypto build
clearly needs some work.

				John Nagle


From iclark at mail.ewu.edu  Fri Sep 21 17:14:48 2007
From: iclark at mail.ewu.edu (Ian Clark)
Date: Fri, 21 Sep 2007 14:14:48 -0700
Subject: newb: Simple regex problem headache
In-Reply-To: <1190408680.273525.209270@w3g2000hsg.googlegroups.com>
References: <1190408680.273525.209270@w3g2000hsg.googlegroups.com>
Message-ID: <fd1c89$okm$1@sea.gmane.org>

crybaby wrote:
> import re
> 
> s1 ='&nbsp;25000&nbsp;'
> s2 = '&nbsp;5.5910&nbsp;'
> 
> mypat = re.compile('[0-9]*(\.[0-9]*|$)')
> rate= mypat.search(s1)
> print rate.group()
> 
> rate=mypat.search(s2)
> print rate.group()
> rate = mypat.search(s1)
> price = float(rate.group())
> print price
> 
> I get an error when it hits the whole number, that is in this format:
> s1 ='&nbsp;25000&nbsp;'
> For whole number s2, mypat catching empty string.  I want it to give
> me 25000.
> I am getting this error:
> 
>     price = float(rate.group())
>     ValueError: empty string for float()
> 
> Anyone knows, how I can get 25000 out of s2 = '&nbsp;5.5910&nbsp;'
> using regex pattern, mypat = re.compile('[0-9]*(\.[0-9]*|$)').  mypat
> works fine for real numbers, but doesn't work for whole numbers.
> 
> thanks
> 

Try this:
     >>> import re
     >>> s1 ='&nbsp;25000&nbsp;'
     >>> s2 = '&nbsp;5.5910&nbsp;'
     >>> num_pat = re.compile(r'([0-9]+(\.[0-9]+)?)')
     >>> num_pat.search(s1).group(1)
     '25000'
     >>> num_pat.search(s2).group(1)
     '5.5910'

Ian



From bj_666 at gmx.net  Sat Sep 22 17:28:21 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 22 Sep 2007 21:28:21 GMT
Subject: I could use some help making this Python code run faster using
	only Python code.
References: <1190325588.608625.259800@q3g2000prf.googlegroups.com>
	<1190328413.226577.206740@k79g2000hse.googlegroups.com>
	<1190330015.131971.265680@y42g2000hsy.googlegroups.com>
	<1190357165.381313.197910@19g2000hsx.googlegroups.com>
	<Xns99B25B0334892duncanbooth@127.0.0.1>
	<1190394011.148384.106280@q3g2000prf.googlegroups.com>
	<mailman.897.1190412168.2658.python-list@python.org>
	<1190417120.723579.267560@22g2000hsm.googlegroups.com>
	<5ljrklF8gic1U3@mid.uni-berlin.de>
	<1190491227.688310.247030@w3g2000hsg.googlegroups.com>
Message-ID: <5llfnlF8gic1U11@mid.uni-berlin.de>

On Sat, 22 Sep 2007 13:00:27 -0700, Python Maniac wrote:

> On Sep 21, 11:39 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>> On Fri, 21 Sep 2007 16:25:20 -0700, Python Maniac wrote:
>>
>> > Well D code is compiled into machine code that runs via a VM.
>>
>> About which D are we talking here?  Not digital mars' successor to C++,
>> right!?
> 
> Yes, Digital Mars D is what I was referring to and yes I know D is not
> as efficient as C++.

But D code doesn't run in a VM unless you see hardware processors as VMs.

Ciao,
	Marc 'BlackJack' Rintsch


From lutz at rmi.net  Mon Sep  3 17:19:54 2007
From: lutz at rmi.net (Mark Lutz)
Date: Mon, 03 Sep 2007 14:19:54 -0700
Subject: Colorado Python training in October
Message-ID: <1188854394.021585.121570@o80g2000hse.googlegroups.com>

Python author and trainer Mark Lutz will be teaching another
3-day Python class at a conference center in Longmont, Colorado,
on October 23-25, 2007.

This is a public training session open to individual enrollments,
and covers the same topics as the 3-day onsite sessions that Mark
teaches, with hands-on lab work.

For more information on this class, please visit these web pages:

http://home.earthlink.net/~python-training/longmont-public-classes.htm

Thanks for your interest.
--Python Training Services



From zentraders at gmail.com  Thu Sep  6 19:41:26 2007
From: zentraders at gmail.com (Zentrader)
Date: Thu, 06 Sep 2007 16:41:26 -0700
Subject: Finding specific date ranges
In-Reply-To: <1189090603.285778.282060@g4g2000hsf.googlegroups.com>
References: <1189090603.285778.282060@g4g2000hsf.googlegroups.com>
Message-ID: <1189122086.388859.146670@r34g2000hsd.googlegroups.com>

On Sep 6, 7:56 am, kyoso... at gmail.com wrote:
> December 31, 2006    January 13, 2007 # doesn't earn
> January 14, 2007        January 27, 2007 # does earn
> January 28, 2007        February 10, 2007 # doesn't
> February 11, 2007       February 24, 2007 # does

Am I over simplifying if I say that since it appears to be a two week
pay period, the date has to be greater than the 11th unless the first,
or first and second, are on a weekend, in which case it would be > 12
or > 13?  Or a reasonable facsimile thereof, depending on whether or
not the two week period is Saturday through Friday.



From sjmachin at lexicon.net  Sun Sep 16 18:28:01 2007
From: sjmachin at lexicon.net (John Machin)
Date: Sun, 16 Sep 2007 15:28:01 -0700
Subject: Try this
In-Reply-To: <1189979679.969074.216490@y42g2000hsy.googlegroups.com>
References: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>
	<13eqsdfsfvsa16f@corp.supernews.com>
	<1189969529.652871.19280@50g2000hsm.googlegroups.com>
	<mailman.621.1189970593.2658.python-list@python.org>
	<1189979679.969074.216490@y42g2000hsy.googlegroups.com>
Message-ID: <1189981681.745195.18130@y42g2000hsy.googlegroups.com>

On Sep 17, 7:54 am, "mensana... at aol.com" <mensana... at aol.com> wrote:
> On Sep 16, 2:22?pm, Steve Holden <st... at holdenweb.com> wrote:
>
>
>
> > mensana... at aol.com wrote:
> > > On Sep 16, 1:10?pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> > >> On Sun, 16 Sep 2007 01:46:34 -0700, GeorgeRXZ <george... at gmail.com>
> > >> declaimed the following in comp.lang.python:
>
> > >>> Then Open the Notepad and type the following sentence, and save the
> > >>> file and close the notepad. Now reopen the file and you will find out
> > >>> that, Notepad is not able to save the following text line.
> > >>> Well you are speed
> > >>> This occurs not only with above sentence but any sentence that has
> > >>> 4 3 3 5 (sequence of characters: Well=4 you=3 are=3 speed=5)
> > >>         I tried. I also opened the saved file in SciTE...
> > >> And the text WAS there...
>
> > >>         It is Notepad that can not properly render what it,
> > >> itself, saved.
>
> > > C:\Documents and Settings\mensanator\My Documents>type huh.txt
> > > Well you are speed
>
> > > Yes, file was saved correctly.
> > > But reopening it shows 9 unprintable characters.
> > > If I copy those to a new file (huh1.txt):
>
> > > C:\Documents and Settings\mensanator\My Documents>type huh1.txt
> > > ?????????
>
> > > But wait...the new file is 20 characters, not 9.
>
> > > 09/16/2007  01:44 PM                18 huh.txt
> > > 09/16/2007  01:54 PM                20 huh1.txt
>
> > > C:\Documents and Settings\mensanator\My Documents>dump huh.txt
> > > huh.txt:
> > > 00000000  5765 6c6c 2079 6f75 2061 7265 2073 7065 Well you are spe
> > > 00000010  6564                                    ed
>
> > > Here's what it's actually doing:
>
> > > C:\Documents and Settings\mensanator\My Documents>dump huh1.txt
> > > huh1.txt:
> > > 00000000  fffe 5765 6c6c 2079 6f75 2061 7265 2073 .~Well you are s
> > > 00000010  7065 6564                               peed
>
> > One word: Unicode.
>
> > The "open" and "save" dialogs allow you to specify an encoding.
>
> And the encoding specified was ANSI.
>
> > If you
> > specify Unicode the you will get what you see above.
>
> And if you specify ANSI _before_ you click the file name,
> the specification switches to Unicode and has to then
> be manually switched back to ANSI.
>
> > If you specify ANSI
> > you will get the text you entered.
>
> It's still a bug in the "open" dialog.

It's more like a bug/feature in its encoding detector. I can get it to
switch to Unicode only if there's an even number of characters AND the
line is NOT terminated by CRLF -- add/remove one alpha character, or
hit the enter key at the end of the line, and it won't detect it as
Unicode when you open it again.

You only get the BOM (0xfffe) if you are silly enough to save it while
it's open in Unicode mode.

>
>
>
> > By the way, this has precisely what to do with Python?
>
> I've been known to use Notepad to create Python
> source code.

Your source code would have to be trivially short to trigger the
strange behaviour.




From pdula at cisco.com  Mon Sep 24 05:37:49 2007
From: pdula at cisco.com (Piotr Dula (pdula))
Date: Mon, 24 Sep 2007 11:37:49 +0200
Subject: IPv6 in python
Message-ID: <FA7FC8ED94835C49B2EF0EB0FB0AAEF02EC701@xmb-ams-331.emea.cisco.com>

Hello,
 
How to make python support IPv6?
 
I tried to do:
 
./configure --enable-ipv6
make 
make install
 
and I didn't get any error. However, IPv6 doesn't seem to be working
yet.
 
then I tried 
 
./configure --enable-ipv6=yes
 
and I got a lot of parse errors (many pages similar to this below)
 
In file included from /root/Piotr/Python-2.5.1/Modules/_tkinter.c:67:
/usr/include/tk.h:581: parse error before "Bool"
/usr/include/tk.h:583: parse error before "event"
/usr/include/tk.h:584: parse error before "root"
/usr/include/tk.h:585: parse error before "subwindow"
/usr/include/tk.h:586: parse error before "time"
/usr/include/tk.h:586: `time' redeclared as different kind of symbol
/usr/include/time.h:184: previous declaration of `time'
/usr/include/tk.h:591: parse error before "same_screen"
/usr/include/tk.h:597: parse error before "Bool"
/usr/include/tk.h:599: parse error before "window"
/usr/include/tk.h:601: parse error before "XActivateEven
 
How to make it work? 
 
Thank you in advance,
 
Piotr
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From bbxx789_05ss at yahoo.com  Tue Sep 25 00:15:49 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Mon, 24 Sep 2007 21:15:49 -0700
Subject: vim - what's a smarttab?
In-Reply-To: <mailman.978.1190630969.2658.python-list@python.org>
References: <1190624225.926815.149720@50g2000hsm.googlegroups.com>
	<mailman.978.1190630969.2658.python-list@python.org>
Message-ID: <1190693749.202770.227890@57g2000hsv.googlegroups.com>

On Sep 24, 4:49 am, Marco <ma... at yafd.de> wrote:
>
> > Alternatively, what is a smarttab?
>
> in VIM type :help smarttab and you'll see the following:
>

Thanks!  I spent an hour hunting around on google with no success. :(

Another question if you don't mind.  I'm using vim 6.2, and I am
trying to setup vim to use different tab sizes based on different file
types.  I've searched around, and as far as I can tell, this should
work:

filetype indent on

Somehow that is supposed to let vim decide what type of file is being
edited.   But, it doesn't work for me.  Is there a list of file types
vim can recognize?  This is what my ~/.vimrc file looks like:

"python settings:
set tabstop=4              "4 space tab
set shiftwidth=4           "The amount to block indent when using <
and >
set smarttab               "Uses shiftwidth instead of tabstop at
start of lines
set expandtab              "Replaces a <TAB> with spaces--more
portable
set softtabstop=4          "Causes backspace to delete 4 spaces =
converted <TAB>

"general settings:
filetype indent on         "new in vim 6.0+; file type specific
indenting
set nu                     "line numbers on (set nonu)
syntax on                  "turns on syntax highlighting




From bdesth.quelquechose at free.quelquepart.fr  Mon Sep  3 11:10:54 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 03 Sep 2007 17:10:54 +0200
Subject: function call
In-Reply-To: <46ddc12c$0$24997$426a74cc@news.free.fr>
References: <1188937059.459609.61850@57g2000hsv.googlegroups.com>
	<46ddc12c$0$24997$426a74cc@news.free.fr>
Message-ID: <46ddc536$0$30590$426a74cc@news.free.fr>

Bruno Desthuilliers a ?crit :
> ianar? a ?crit :
> 
>> Hey all,
>>
>> Is there a way of printing out how a function was called? In other
>> words if I do the following:
>>
>> def someFunction(self):
>>     self.someOtherFunction(var1, var2)
>>
>>
>> I would get something like "someOtherFunction: called by:
>> someFunction, args are: var1, var2"
>>
>> Thanks in advance
>>
> You may be able to solve this using a decorator (to avoid polluting your 
> code with this) and the infamous sys._getframe() hack.

Not even with sys._getframe in fact - or at least not directly !-)


import inspect

def trace(func):
     def traced(*args, **kw):
         f = inspect.currentframe(1)
         caller = inspect.getframeinfo(f)[2]
         print "%s : called by %s with %s %s" \
               % (caller, func.__name__, str(args), kw)
         return func(*args, **kw)
     return traced

@trace
def test(toto, tata=None):
     return 42

def call(toto):
     return test(toto, 24)

call("foo")

HTH


From DustanGroups at gmail.com  Sun Sep 16 13:08:06 2007
From: DustanGroups at gmail.com (Dustan)
Date: Sun, 16 Sep 2007 17:08:06 -0000
Subject: Try this
In-Reply-To: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>
References: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>
Message-ID: <1189962486.806757.257700@w3g2000hsg.googlegroups.com>

On Sep 16, 3:46 am, GeorgeRXZ <george... at gmail.com> wrote:
> If you have Microsoft windows 98/2000/ME/XP/2003 Operating System on
> your PC.
> Then Open the Notepad and type the following sentence, and save the
> file and close the notepad. Now reopen the file and you will find out
> that, Notepad is not able to save the following text line.
>
> Well you are speed
>
> This occurs not only with above sentence but any sentence that has
>
> 4 3 3 5 (sequence of characters: Well=4 you=3 are=3 speed=5)
>
> When type following sentence and save file then same thing occurs.
>
> This is not Maria
>
> GEOrgE
> << Develop a website that will help people,
> Avoid spamming, provide quality contents on your website >>
>
> http://zsoftwares.googlepages.com/index.htm

Didntworkiwantmymoneyback.



From stef.mientki at gmail.com  Sun Sep 23 18:08:09 2007
From: stef.mientki at gmail.com (stef mientki)
Date: Mon, 24 Sep 2007 00:08:09 +0200
Subject: building a GUI
In-Reply-To: <200709232234.54500.phil@riverbankcomputing.co.uk>
References: <1190557293.266783.251480@y42g2000hsy.googlegroups.com>	<5lnp2rF90pqqU1@mid.uni-berlin.de>
	<46F6CB6C.3050609@gmail.com>
	<200709232234.54500.phil@riverbankcomputing.co.uk>
Message-ID: <46F6E3C9.7040702@gmail.com>

Phil Thompson wrote:
> On Sunday 23 September 2007, stef mientki wrote:
>   
>> Diez B. Roggisch wrote:
>>     
>>> stef mientki schrieb:
>>>       
>>>> Thomas Dybdahl Ahle wrote:
>>>>         
>>>>> Den Sun, 23 Sep 2007 17:28:38 +0200 skrev stef mientki:
>>>>>           
>>>>>> yadin wrote:
>>>>>>             
>>>>>>> if i were up to make a GUI chich are the advantages of choosing
>>>>>>> python over matlab or java?
>>>>>>>               
>>>>>> The best is Delphi,
>>>>>> second is VB,
>>>>>>             
>>>>> That sounds mostly like a personal preference :)
>>>>>           
>>>> Well I prefer Python ( because of it's OS-independancy and it's open
>>>> source),
>>>> but Python is really (still) much worse for GUI designs.
>>>> Just compare some parameters like:
>>>> - ease of use
>>>> - speed of development
>>>> - support of features
>>>> - availability of libraries
>>>> - documentation
>>>>         
>>> Sounds like PyQt for me. Best GUI-designer I know, tremendous speed in
>>> development, giant sized lib that does all kinds of stuff & is
>>> brilliantly designed + professional grade docus.
>>>       
>> Could well be,
>> but I never looked at PyQt seriously,
>> because of their weird license.
>>     
>
> It's not weird. It's either GPL or proprietary. Your choice. That's as 
> complicated as it gets.
>   
This is what I find "weird":
== quote ==
Trolltech's commercial license terms do not allow you to start 
developing proprietary software using the Open Source edition.
== end quote ==
Stef



From jcd at sdf.lonestar.org  Sun Sep  9 15:15:56 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Sun, 09 Sep 2007 15:15:56 -0400
Subject: Modul (%) in python not like in C?
In-Reply-To: <880dece00709091201n449d4c2k31998a5d426de17d@mail.gmail.com>
References: <880dece00709091201n449d4c2k31998a5d426de17d@mail.gmail.com>
Message-ID: <46E4466C.2030303@sdf.lonestar.org>

Dotan Cohen wrote:
> FIrst of all, how is the % symbol (as in 70%6=4) called in English?
>
> Second, in Turbo C -111%10=-1 however in python -111%10=9. Is one or
> the other in error? Is this a known gotcha? I tried to google the
> subject however one cannot google the symbol %. Thanks in advance.
>
> Dotan Cohen
>   

The % operator is called "modulo" in English.  I don't think the 
difference in implementation is an error.  It's just a difference of 
calculation method. 

Python will always yield a number x = m%n such that 0 <= x < n, but 
Turbo C will always yield a number such that if x = m%n -x = -m%n.  That 
is, since 111 % 10 = 1, -111 % 10 = -1.  The two values will always 
differ by n (as used above). 

I'm sure there are mathematicians on the list who can give you a more 
technical, precise explanation of the reasons for the different results.

Cheers,
Cliff


From grante at visi.com  Thu Sep  6 22:34:10 2007
From: grante at visi.com (Grant Edwards)
Date: Fri, 07 Sep 2007 02:34:10 -0000
Subject: why should I learn python
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
	<mailman.189.1189118213.2658.python-list@python.org>
	<87zlzzs9by.fsf@wilson.homeunix.com>
Message-ID: <13e1e52cfb1u505@corp.supernews.com>

On 2007-09-06, Torsten Bronger <bronger at physik.rwth-aachen.de> wrote:
> Hall?chen!
>
> Tom Brown writes:
>
>> [...] Python has been by far the easiest to develop in.  Some
>> people might say it is not "real programming" because it is so
>> easy.
>
> I can't believe this.  Have you really heard such a statement?

Maybe it's a allusion to that fake Stroustrup interview where
he supposedly explains that C++ was meant to be a difficult
language to use as a means to keep more programmers employed at
higher salaries?

-- 
Grant Edwards                   grante             Yow!  Yow! I threw up on
                                  at               my window!
                               visi.com            


From jcd at sdf.lonestar.org  Tue Sep 11 06:53:50 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Tue, 11 Sep 2007 06:53:50 -0400
Subject: Enum class with ToString functionality
In-Reply-To: <1r6ae3tuv8rj19ka3b2tpqsni29v48b7p5@4ax.com>
References: <1189416537.050002.61120@r34g2000hsd.googlegroups.com>
	<1r6ae3tuv8rj19ka3b2tpqsni29v48b7p5@4ax.com>
Message-ID: <46E673BE.6070208@sdf.lonestar.org>

Zara wrote:
> On Mon, 10 Sep 2007 02:28:57 -0700, bg_ie at yahoo.com wrote:
>
>   
>> Hi,
>>
>> I have the following class -
>>
>> class TestOutcomes:
>>    PASSED = 0
>>    FAILED = 1
>>    ABORTED = 2
>>
>> plus the following code -
>>
>> testResult = TestOutcomes.PASSED
>>
>> testResultAsString
>> if  testResult == TestOutcomes.PASSED:
>>    testResultAsString = "Passed"
>> elif testResult == TestOutcomes.FAILED :
>>    testResultAsString = "Failed"
>> else:
>>    testResultAsString = "Aborted"
>>
>> But it would be much nicer if I had a function to covert to string as
>> part of the TestOutcomes class. How would I implement this?
>>
>>     
>  You should implement __str__ (or __repr__) method in your class, 
>
> class TestOutcomes:
>     PASSED = 0
>     FAILED = 1
>     ABORTED = 2
>
>    def __str__(self):
>       textResultAsString="Unknown"
>       if  testResult == TestOutcomes.PASSED:
>          testResultAsString = "Passed"
>       elif testResult == TestOutcomes.FAILED :
>          testResultAsString = "Failed"
>       else:
>          testResultAsString = "Aborted"
>       return testResultAsString
>
> Regards,
>
> Zara
>
>   
This code cannot output "Unknown," because you use an else: at the end
of your if-chain to represent a specific (non-catch-all) case. 

s/else:/elif testResult == TestOutcomes.ABORTED:/

Cheers,
Cliff


From elmakko at gmail.com  Sat Sep 29 06:40:21 2007
From: elmakko at gmail.com (makko)
Date: Sat, 29 Sep 2007 10:40:21 -0000
Subject: Balloon Taskbar Popup for Windows XP
Message-ID: <1191062421.610473.13070@19g2000hsx.googlegroups.com>

Greetings,
I need to create a function that will produce a balloon popup in the
taskbar when called. Whats the shortest and easiest way to do this?
Thanks.

regards,
Makko



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Sep 26 16:42:00 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 26 Sep 2007 22:42:00 +0200
Subject: Delete values from a string using the index
References: <1190838311.630506.64670@y42g2000hsy.googlegroups.com>
Message-ID: <5lvugoFap2kaU1@mid.individual.net>

 koutoo at hotmail.com wrote:
> How do I delete or remove values from a list or string using the
> index.
> 
> If a = [1,2,3,4,5,6,7,8] and I want to get rid of 1 -5, how would
> I do that?

del a[0:5]

Be sure to check out the relevant section of the Python tutorial.

http://docs.python.org/tut/node7.html

Regards,


Bj?rn

-- 
BOFH excuse #31:

cellular telephone interference



From llothar at web.de  Sat Sep  1 06:44:10 2007
From: llothar at web.de (llothar)
Date: Sat, 01 Sep 2007 03:44:10 -0700
Subject: How to find out if the interpreter is a debug build?
In-Reply-To: <46d905d5$0$26151$9b622d9e@news.freenet.de>
References: <1188609417.273513.74450@i13g2000prf.googlegroups.com>
	<46d905d5$0$26151$9b622d9e@news.freenet.de>
Message-ID: <1188643450.431001.219220@o80g2000hse.googlegroups.com>

On 1 Sep., 13:25, "Martin v. L?wis" <mar... at v.loewis.de> wrote:

> If you want it cross-platform, you can check whether sys.getobjects
> is available. That, of course, is also unsafe because there isn't
> a single "debug build" on Unix, but instead, several debugging
> features can be enabled and disabled separately, so you would have
> to specify first what precisely a debug build is.

I thought that the answer is as complicated as this. At the moment it
would be nice and enough if i only can find out if my binary
extension can be loaded into an interpreter or if this requires a
new extension build.

It is a huge problem and weakness of python if this is impossible
with
debug builds.  And if you answer that this is up to the user, i have
to
say, no it isn't: At least if you are like me and are working on an
IDE with a debugger component.




From bronger at physik.rwth-aachen.de  Wed Sep  5 18:20:45 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Thu, 06 Sep 2007 00:20:45 +0200
Subject: Wanted: safe codec for filenames
References: <87sl5tcrw9.fsf@wilson.homeunix.com>
Message-ID: <87ps0w92ki.fsf@wilson.homeunix.com>

Hall?chen!

Torsten Bronger writes:

> I'd like to map general unicode strings to safe filename.  I tried
> punycode but it is case-sensitive, which Windows is not.  Thus,
> "Hallo" and "hallo" are mapped to "Hallo-" and "hallo-", however,
> I need uppercase Latin letters being encoded, too, and the
> encoding must contain only lowercase Latin letters, numbers,
> underscores, and maybe a little bit more.  The result should be
> more legible than base64, though.
>
> Has anybody created such a codec already?

Okay, the following works fine for me:


--8<---------------cut here---------------start------------->8---
import codecs

class Codec(codecs.Codec):
    """Codec class for safe filenames.  Safe filenames work on all important
    filesystems, i.e., they don't contain special or dangerous characters, and
    they don't assume that filenames are treated case-sensitively.

        >>> u"hallo".encode("safefilename")
        'hallo'
        >>> u"Hallo".encode("safefilename")
        '(h)allo'
        >>> u"MIT Thesis".encode("safefilename")
        '(mit)_(t)hesis'
        >>> u"Gesch\\u00e4ftsbrief".encode("safefilename")
        '(g)esch{e4}ftsbrief'

    Of course, the mapping works in both directions as expected:

        >>> "(g)esch{e4}ftsbrief".decode("safefilename")
        u'Gesch\\xe4ftsbrief'
        >>> "(mit)_(t)hesis".decode("safefilename")
        u'MIT Thesis'

    """
    lowercase_letters = "abcdefghijklmnopqrstuvwxyz"
    safe_characters = lowercase_letters + "0123456789-+!$%&`'@~#.,^"
    uppercase_letters = lowercase_letters.upper()
    def encode(self, input, errors='strict'):
        """Convert Unicode strings to safe filenames."""
        output = ""
        i = 0
        input_length = len(input)
        while i < input_length:
            c = input[i]
            if c in self.safe_characters:
                output += str(c)
            elif c == " ":
                output += "_"
            elif c in self.uppercase_letters:
                output += "("
                while i < input_length and input[i] in self.uppercase_letters:
                    output += str(input[i]).lower()
                    i += 1
                output += ")"
                continue
            else:
                output += "{" + hex(ord(c))[2:] + "}"
            i += 1
        return output, input_length
    def handle_problematic_characters(self, errors, input, start, end, message):
        if errors == 'ignore':
            return u""
        elif errors == 'replace':
            return u"?"
        else:
            raise UnicodeDecodeError("safefilename", input, start, end, message)
    def decode(self, input, errors='strict'):
        """Convert safe filenames to Unicode strings."""
        input = str(input)
        input_length = len(input)
        output = u""
        i = 0
        while i < input_length:
            c = input[i]
            if c in self.safe_characters:
                output += c
            elif c == "_":
                output += " "
            elif c == "(":
                i += 1
                while i < input_length and input[i] in self.lowercase_letters:
                    output += input[i].upper()
                    i += 1
                if i == input_length:
                    self.handle_problematic_characters(errors, input, i-1, i, "open parenthesis was never closed")
                    continue
                if input[i] != ')':
                    self.handle_problematic_characters(
                            errors, input, i, i+1, "invalid character '%s' in parentheses sequence" % input[i])
                    continue
            elif c == "{":
                end_position = input.find("}", i)
                if end_position == -1:
                    end_position = i+1
                    while end_position < input_length and input[end_position] in "0123456789abcdef" and \
                            end_position - i <= 8:
                        end_position += 1
                    output += self.handle_problematic_characters(errors, input, i, end_position,
                                                                 "open backet was never closed")
                    i = end_position
                    continue
                else:
                    try:
                        output += unichr(int(input[i+1:end_position], 16))
                    except:
                        output += self.handle_problematic_characters(errors, input, i, end_position+1,
                                                                "invalid data between brackets")
                i = end_position
            else:
                output += self.handle_problematic_characters(errors, input, i, i+1, "invalid character '%s'" % c)
            i += 1
        return output, input_length

class StreamWriter(Codec, codecs.StreamWriter):
    pass
            
class StreamReader(Codec, codecs.StreamReader):
    pass
                

def _registry(encoding):
    if encoding == "safefilename":
        return (Codec().encode, Codec().decode, StreamReader, StreamWriter)
    else:
        return None

codecs.register(_registry)

if __name__ == "__main__":
    import doctest
    doctest.testmod()
--8<---------------cut here---------------end--------------->8---


-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From ndbecker2 at gmail.com  Mon Sep 24 14:13:18 2007
From: ndbecker2 at gmail.com (Neal Becker)
Date: Mon, 24 Sep 2007 14:13:18 -0400
Subject: puzzled about floats
Message-ID: <fd8utc$2u3$1@sea.gmane.org>

from math import modf

class nco (object):
    def __init__ (self, delta):
        self.delta = delta
        self.phase = 0.0
    def __call__ (self):
        self.phase += self.delta
        f,i = modf (self.phase)
        print  modf (self.phase)
        if (self.phase > 1.0):
            self.phase -= 1.0
        return self.phase

n = nco (0.1)
for x in xrange (100):
    print '%.12f' % n()

prints out
[...]
(0.99999999999999978, 0.0)   <<< from modf
1.000000000000   << from n()

I'm baffled as to why 'print modf (self.phase)' prints out the first value,
but the result printed in the 2nd case is different.  Without any precision
spec on the first print, an approximate float value was printed, but even
with %.12f, the second gives exactly 1.000....



From belred at gmail.com  Mon Sep 24 20:34:38 2007
From: belred at gmail.com (belred at gmail.com)
Date: Tue, 25 Sep 2007 00:34:38 -0000
Subject: ironpython with nosetest
Message-ID: <1190680478.800804.207350@o80g2000hse.googlegroups.com>

has anyone tried nosetest with ironpython?  i installed IPCE-r6,
copied the nose directory below the .egg directory from my cpython
directory and copied to IPCE-r6/lib.  i then created a file called
n.py which contained two lines:

import nose
none.run()

i was then able to run it against a test file such as:

ipy n.py test_n.py

or

ipy n.py test_n.py:TestTest.test_f1

it worked as expected.  what doesn't work is if i omit the file name
and just run ipy n.py, it won't discover any test files. -w (working
directory) and -a (attribute) options seem to be ignored. but -s for
(don't capture output) and -h (help) does work.


thanks,

bryan



From jstroud at mbi.ucla.edu  Thu Sep  6 22:32:37 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 06 Sep 2007 19:32:37 -0700
Subject: why should I learn python
In-Reply-To: <87zlzzs9by.fsf@wilson.homeunix.com>
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>	<mailman.189.1189118213.2658.python-list@python.org>
	<87zlzzs9by.fsf@wilson.homeunix.com>
Message-ID: <9L2Ei.1850$Sd4.621@nlpi061.nbdc.sbc.com>

Torsten Bronger wrote:
> Hall?chen!
> 
> Tom Brown writes:
> 
>> [...] Python has been by far the easiest to develop in.  Some
>> people might say it is not "real programming" because it is so
>> easy.
> 
> I can't believe this.  Have you really heard such a statement?
> 
> Tsch?,
> Torsten.
> 

Look, a "real" programming language is scheme, not something trivial to 
understand like (the basics of) python. Scheme is hard to understand and 
takes a long time to get used to, so its perfect as a learning tool--to 
make the professors look smarter. This is why its what they teach as an 
introductory course at MIT. This is also why physicists like RPN 
calculators.

(see (later you))

James

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

http://www.jamesstroud.com/


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Sep 12 18:54:52 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 13 Sep 2007 00:54:52 +0200
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr>
	<5kq1hgF4r90oU1@mid.individual.net> <46E7D82C.40302@web.de>
Message-ID: <5kr91sF53m8gU4@mid.individual.net>

Stefan Behnel wrote:
> Bjoern Schliessmann wrote:


>> If this was needless, why do C++ and Java have the "this"
>> pointer?
> 
> Be careful when you use the word "needless" in the context of
> Java.

Umm, why? I didn't introduce it.

Regards,


Bj?rn

-- 
BOFH excuse #8:

static buildup



From zentraders at gmail.com  Wed Sep 19 10:50:57 2007
From: zentraders at gmail.com (Zentrader)
Date: Wed, 19 Sep 2007 07:50:57 -0700
Subject: still get a <defunct> using a python script in the crontab
In-Reply-To: <1190196137.140718.198510@n39g2000hsh.googlegroups.com>
References: <1190196137.140718.198510@n39g2000hsh.googlegroups.com>
Message-ID: <1190213457.663885.313330@k35g2000prh.googlegroups.com>

> If I run the command /usr/sbin/program_prgchk everything works (no
> <defunct> process)
> But when I use it in the crontab I get a <defunct> process

The crontabs file on my system is stored in /var/spool/cron/
crontabs/.  It appears you are checking the wrong file.  Try a
"crontab -e" from the command line and compare it to the contents in
the /etc/crontab file.



From zzbbaadd at aol.com  Wed Sep 12 13:43:53 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Wed, 12 Sep 2007 10:43:53 -0700
Subject: Python 3K or Python 2.9?
In-Reply-To: <1189618530.872819.136450@57g2000hsv.googlegroups.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
Message-ID: <1189619033.968437.286580@g4g2000hsf.googlegroups.com>


>
> "this" in C++ and Java is not shown in the parameter list, which was
> what he was
> complaining about.  He wants
>
> class MyClass:
>         def SomeFunction(someParameter):
>            self.someParameter = someParameter
>
> not
>
> class MyClass:
>         def SomeFunction(self, someParameter):
>            self.someParameter = someParameter
>
> The confusing way about the current Python method when you first
> encounter it is
>  why is "self" being passed in when you write the function but not
> when you call it. If the compiler is smart enough to know that
>
>     a = MyClass()
>     a.SomeFunction(12)
>
> SomeFunction() has a "self" implicitly added to the parameter list, it
> seems that it should be smart enough to know that a function defined
> in a class has a "self" implicitly added to the parameter list.

In C++ and Java I don't believe "this" is ever referred to as an
implicit function parameter. It is a (sometimes necessary) way to
reference the object inside one if it's methods. If it is in fact a
real parameter in the underlying compiled-code implementation, that
knowledge hurts more than it helps.



From rampeters at gmail.com  Mon Sep 10 14:53:54 2007
From: rampeters at gmail.com (johnny)
Date: Mon, 10 Sep 2007 11:53:54 -0700
Subject: noob: reloading modified python file within Python Shell
Message-ID: <1189450434.578698.286760@o80g2000hse.googlegroups.com>

from people.models import *

Now I make changes to the models.py.  How do I reload this module in
Python Shell?



From bignose+hates-spam at benfinney.id.au  Sun Sep 30 00:15:09 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 30 Sep 2007 14:15:09 +1000
Subject: Optparse and help formatting?
References: <mailman.1294.1191120597.2658.python-list@python.org>
Message-ID: <87abr423hu.fsf@benfinney.id.au>

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

> I've been learning the ropes of the optparse module and have been
> having some trouble getting the help to format the way I want.

A quick perusal of the 'optparse.py' code shows me this:

========
[...]
class OptionParser([...]):
    def __init__([...],
                 formatter=None,
                 [...]):
        [...]
        if formatter is None:
            formatter = IndentedHelpFormatter()
        [...]
========

So, the OptionParser init method accepts the help formatter as the
'formatter' argument, defaulting to a new instance of
IndentedHelpFormatter.

Presumably, it's a matter of subclassing 'optparse.HelpFormatter' and
overriding the behaviour you want to change, then passing an instance
of your new class as the 'formatter' argument to the 'OptionParser()'
invocation.

-- 
 \        "Members of the general public commonly find copyright rules |
  `\     implausible, and simply disbelieve them."  -- Jessica Litman, |
_o__)                                              _Digital Copyright_ |
Ben Finney


From david at asdf.asdf  Sun Sep  9 21:58:54 2007
From: david at asdf.asdf (bambam)
Date: Mon, 10 Sep 2007 11:58:54 +1000
Subject: concise code (beginner)
References: <13dsvqrqivtf092@corp.supernews.com>
	<13dv4uqqb806ff0@corp.supernews.com> <fbqo83$8fd$1@lust.ihug.co.nz>
Message-ID: <13e99756io95p66@corp.supernews.com>

I can try that, but I'm not sure that it will work. The problem
is that devList is just a pointer to a list owned by someone else.
Making devList point to a new list won't work: I need to make
the parent list different. I could do this by adding an extra
level of indirection, but I think at the risk making the call
environment more complex.

Still, the main thing is that I hadn't even thought of doing it
that way.

Thank you,

Steve.


"Lawrence D'Oliveiro" <ldo at geek-central.gen.new_zealand> wrote in message 
news:fbqo83$8fd$1 at lust.ihug.co.nz...
> In message <13dv4uqqb806ff0 at corp.supernews.com>, bambam wrote:
>
>> The devices are in a list, and are removed by using pop(i). This
>> messes up the loop iteration, so it is actually done by setting a
>> flag on each device in the exception handler, with ANOTHER
>> loop after each write/read/calculate sequence.
>
> Why not just build a new list? E.g.
>
>    newdevs = []
>    for dev in devs :
>        ...
>        if not removing_dev :
>            newdevs.append(dev)
>        #end if
>    #end for
>    devs = newdevs 




From jstroud at mbi.ucla.edu  Fri Sep 14 15:52:52 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 14 Sep 2007 12:52:52 -0700
Subject: Rename multiple files using names in a text file
In-Reply-To: <QCAGi.159$cz3.82@nntpserver.swip.net>
References: <QCAGi.159$cz3.82@nntpserver.swip.net>
Message-ID: <fceoe4$hj2$1@daisy.noc.ucla.edu>

r?mi wrote:
> Hi,
> 
> I would like to rename files (jpg's ones) using a text file containing the
> new names...
> Below is the code that doesn't work :
> *****
> #!/usr/bin/python
> #-*- coding: utf-8 -*-
> from os import listdir, getcwd, rename
> import re
> list_names=['new_name1','new_name2']
> list_files = listdir(getcwd())
> filtre = re.compile("jpg$", re.IGNORECASE) 
> list_jpg = filter(filtre.search, list_files)
> #strip all element of list list_jpg
> list_jpg_strip=[]
> for nom in list_jpg:
> 	#print nom.strip()
> 	list_jpg_strip.append(nom.strip())
> #let's rename :
> i=0
> while i <= len(list_jpg_strip):
> 	rename(list_jpg_strip[i],list_names[i])
> 	i=i+1
> ****
> The error message is :
> File "ecm.py", line 17, in <module>
>     rename(list_jpg_strip[i],list_names[i])
> OSError: [Errno 2] No such file or directory
> and all files exists, I checked it hundred times ! :-s
> Do you have a clue ?
> Thanks a lot.
> R?mi.

Other than that your strip() is stripping off some whitespace that is 
part of the name, I really can't see the problem either, but did you try 
to add in the explicit path? E.g.:

path_to = getcwd()
list_files = listdir(path_to)
.
.
.
for nom in list_jpg:
   old_path = os.path.join(path_to, nom.strip())
   list_jpg_strip.append(old_path)
.
.
.
for old_path, new_name in zip(list_jpg_strip, list_names):
   new_path = os.path.join(path_to, new_name)
   rename(old_path, new_path)

James


From zentraders at gmail.com  Tue Sep  4 15:10:16 2007
From: zentraders at gmail.com (Zentrader)
Date: Tue, 04 Sep 2007 12:10:16 -0700
Subject: gucci shoes,LV handbag chanel levi's kobe max
In-Reply-To: <1188915977.444157.103850@r29g2000hsg.googlegroups.com>
References: <1188915977.444157.103850@r29g2000hsg.googlegroups.com>
Message-ID: <1188933016.338377.270610@r29g2000hsg.googlegroups.com>

Reported as spam



From __peter__ at web.de  Sun Sep  2 05:18:00 2007
From: __peter__ at web.de (Peter Otten)
Date: Sun, 2 Sep 2007 11:18:00 +0200
Subject: localizing a sort
References: <mailman.283.1188683800.28954.python-list@python.org>
Message-ID: <fbdv47$jcm$03$1@news.t-online.com>

Am Sat, 01 Sep 2007 18:56:38 -0300 schrieb Ricardo Ar?oz:

> Hi, I've been working on sorting out some words.
> 
> My locale is :
>>>> import locale
>>>> locale.getdefaultlocale()
> ('es_AR', 'cp1252')
> 
> I do :
>>>> a = '???????????????'
>>>> print ''.join(sorted(a, cmp=lambda x,y: locale.strcoll(x,y)))
> aeiou???????????????

The lambda is superfluous. Just write cmp=locale.strcoll instead.
 
> This is not what I am expecting. I was expecting :
> a???e???i???.....etc.
> 
> The reason is that if you want to order some words (say for a dictionary
> (paper dict, where you look up words)) this is what happens :
>>>> a = 'pal?bra de p?labra de pblabra'
>>>> print ' '.join(sorted(a.split(), cmp=lambda x,y: locale.strcoll(x, y)))
> de de pal?bra pblabra p?labra
> 
> While any human being would expect :
> 
> de de pal?bra p?labra pblabra
> 
> Does anybody know a way in which I could get the desired output?

I suppose it would work on your machine if you set the locale first with

>>> locale.setlocale(locale.LC_ALL, "")
'de_DE.UTF-8'

I have to resort to a list instead of a string on mine because it uses the 
UTF-8 encoding where one character may consist of more than one byte.
(Providing key is more efficient than cmp.)

>>> a = ['?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', 'a', 'e', 'i', 'o', 'u']
>>> print "".join(sorted(a, key=locale.strxfrm))
a???e???i???o???u???

However, to make your program a bit more portable I recommend that you 
use unicode instead of str:

>>> import locale
>>> locale.setlocale(locale.LC_ALL, "")
'de_DE.UTF-8'
>>> encoding = locale.getlocale()[1]
>>> def sortkey(s):
...     return locale.strxfrm(s.encode(encoding))
... 
>>> print "".join(sorted(u"???????????????aeiou", key=sortkey))
a???e???i???o???u???
>>> 

Peter


From ldo at geek-central.gen.new_zealand  Mon Sep 10 20:22:32 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Tue, 11 Sep 2007 12:22:32 +1200
Subject: /dev/null as a file-like object, or logging to nothing
References: <87k5r1jdzq.fsf@wilson.homeunix.com>
	<5kg48jF33dv5U3@mid.uni-berlin.de>
	<87fy1pjbpl.fsf@wilson.homeunix.com>
	<uxv*tevUr@news.chiark.greenend.org.uk>
Message-ID: <fc4n48$s40$2@lust.ihug.co.nz>

In message <uxv*tevUr at news.chiark.greenend.org.uk>, Sion Arrowsmith wrote:

> Torsten Bronger  <bronger at physik.rwth-aachen.de> wrote:
>>Marc 'BlackJack' Rintsch writes:
>
>>> `os.devnull`?
>
>>Yes, but I wasn't really sure how portable it is, in particular, on
>>Windows.
> 
> Windows has a NUL: device which behaves like /dev/null .

It's not a device, it's a reserved file name. Or rather, a reserved file
name prefix: any attempt to open a file name beginning with NUL, e.g.
NUL.DAT, will cause your output to disappear into a black hole.

This has bitten Windows users more than once.


From pavlovevidence at gmail.com  Sat Sep 29 03:26:06 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sat, 29 Sep 2007 03:26:06 -0400
Subject: python 2.5 and 3gb switch
References: <fdkan6$ne0$1@aioe.org> <fdkfqb$qr$1@daisy.noc.ucla.edu>
	<fdkq8g$vj2$1@aioe.org>
Message-ID: <46fe0a01$0$7528$4c368faf@roadrunner.com>

On Sat, 29 Sep 2007 18:10:22 +1200, neil wrote:
> why?

An error traceback or any other information might help us understand the 
problem.  Even if you think you know what the issue is--and you didn't 
seem 100% certain--an example would help other people understand the 
issue better.


> I am asking if any one knows of a 3gb python build. The code runs
> successfully in lesser missions it just wont run in the extra memory
> available when I try to run it along with my other programs in a 3gb
> space.
> thanks for your reply though

You're probably out of luck.  Blender uses a built-in Python interpreter, 
which means you're stuck with whatever version it uses.  If you were to 
install a different version of Python, Blender wouldn't use it--it would 
still use it's built-in version.

(On Windows, I'm not sure if Blender ships with the Python DLL or if 
Python is statically linked in.  If Blender does ship with the Python 
DLL, you could try to replace the DLL it ships with with the DLL from a 
64-bit build of Python, but it would almost certainly crash Blender 
because the function signatures would be different.  Hell, much lesser 
changes can cause problems: it is because of Blender that I compile 
Python in UCS-4 mode.)

There is another possibility: perhaps it is a 64-bit version of Python 
built into Blender, but you need some standard libraries not supplied by 
Blender.  (This is something a traceback might have been able to help us 
find out.)  Does your conversion utility depend on having Python 
installed?  If so, then installing a 64-bit version could help.  But, it 
still behooves you to install the exact same version of Python, 
preferrably built with the same options.

I can't help you there, though; don't run Windows myself.  Did you look 
at the Active State distros?  Maybe they have one.

And finally, asking on the Blender forums would probably be more helpful.


Carl Banks


From dariusjack2006 at yahoo.ie  Fri Sep 21 07:00:23 2007
From: dariusjack2006 at yahoo.ie (http://members.lycos.co.uk/dariusjack/)
Date: Fri, 21 Sep 2007 04:00:23 -0700
Subject: Who can develop the following Python script into working
	application ?
In-Reply-To: <1190334828.210230.293980@50g2000hsm.googlegroups.com>
References: <1190334828.210230.293980@50g2000hsm.googlegroups.com>
Message-ID: <1190372423.768184.60080@19g2000hsx.googlegroups.com>

On Sep 21, 2:33 am, "http://members.lycos.co.uk/dariusjack/"
<dariusjack2... at yahoo.ie> wrote:
> Hi,
>
> I am happy user of Nokia 770 tablett
> and one application for  Nokia 770 is maemo mapper (beta navigation
> application).
> And the following script should run under mm (for Debian).
> Its developer told me it wans intended for other developers.
> I have no idea how to write Python script
> so please tell me how to learn how the following script works and how
> to modify it to be fully working,
> Frankly speaking I would prefer to pay for your kind assistance
> as it may take me to much time to learn some Python and understand the
> following script.
>
> I would like to modify it to add 2 more columns to SQL (sqlite3) POI
> database, to set proximity value and spead limit as in safety cam POI
> in standard car navigation systems.
>
> Please let me know your opinion.
>
> Darius
>
> #!/usr/bin/python2.5
> #
> # This library is free software; you can redistribute it and/or
> # modify it under the terms of the GNU Lesser General Public
> # License as published by the Free Software Foundation; either
> # version 2.1 of the License, or (at your option) any later version.
> #
> # This library is distributed in the hope that it will be useful,
> # but WITHOUT ANY WARRANTY; without even the implied warranty of
> # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> # Lesser General Public License for more details.
> #
> # You should have received a copy of the GNU Lesser General Public
> # License along with this library; if not, write to the Free Software
> # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> 02110-1301  USA
>
> __author__    = "Henri Bergius <henri.berg... at iki.fi>"
> __version__   = "0.0.1"
> __date__      = "2007-03-06"
> __copyright__ = "Copyright (c) 2007 %s. All rights reserved." %
> __author__
> __licence__   = "LGPL"
>
> import sqlite3
> import dbus
> import httplib
> import os
> from xml.dom.minidom import parseString
>
> # Start with getting position from GeoClue
> bus = dbus.SessionBus()
> # TODO: Get the GeoClue interface to use from /schemas/apps/geoclue/
> position/defaultpath
> # and /schemas/apps/geoclue/position/defaultserviceGConf keys
> proxy_obj =
> bus.get_object('org.foinse_project.geoclue.position.hostip', '/org/
> foinse_project/geoclue/position/hostip')
> geoclue_iface = dbus.Interface(proxy_obj,
> 'org.foinse_project.geoclue.position')
>
> # Get the coordinates from the service
> coordinates = geoclue_iface.current_position()
> # We can also use hardcoded
> #coordinates[0] = 60.158806494564
> #coordinates[1] = 24.9426341056824
>
> print "According to GeoClue you are in %s %s." % (coordinates[0],
> coordinates[1])
>
> # Make the HTTP request to the Geonames service
> print "Pulling local Wikipedia pages from Geonames"
> http_connection = httplib.HTTPConnection("ws.geonames.org")
> http_connection.request("GET", "/findNearbyWikipedia?lat=%s" %
> coordinates[0] + "&lng=%s" % coordinates[1] + "&maxRows=100")
> http_response = http_connection.getresponse()
> # TODO: Error handling
> xml = http_response.read()
>
> def parse_entries(xml):
>     dom = parseString(xml)
>     entries = dom.getElementsByTagName('entry')
>     results = []
>     for entry in entries:
>         entry_dictionary = {}
>         entry_dictionary['title'] = entry.getElementsByTagName('title')
> [0].firstChild.data
>         entry_dictionary['summary'] =
> entry.getElementsByTagName('summary')[0].firstChild.data + " (source:
> Wikipedia)"
>
>         if (entry.getElementsByTagName('feature')[0].firstChild):
>             entry_dictionary['feature'] =
> entry.getElementsByTagName('feature')[0].firstChild.data
>
>         entry_dictionary['lat'] =
> float(entry.getElementsByTagName('lat')[0].firstChild.data)
>         entry_dictionary['lon'] =
> float(entry.getElementsByTagName('lng')[0].firstChild.data)
>         results.append(entry_dictionary)
>     return results
>
> entries = parse_entries(xml)
>
> # Open SQLite connection
> #sqlite_connection = sqlite3.connect(os.path.expanduser("~/
> MyDocs/.documents/poi.db"))
> sqlite_connection = sqlite3.connect(os.path.expanduser("/home/user/
> MyDocs/.documents/poi.db"))
> sqlite_cursor = sqlite_connection.cursor()
> for entry in entries:
>     # Check if the entry is already in database
>     sql_variables = (entry["title"],)
>     sqlite_cursor.execute('select poi_id from poi where label=?',
> sql_variables)
>     existing_entry_id = sqlite_cursor.fetchall()
>     if (existing_entry_id):
>         print "%s is already in database, skipping" % entry["title"]
>         # TODO: Update
>     else:
>         print "Inserting %s (%s, %s) into POI database" %
> (entry["title"], entry["lat"], entry["lon"])
>         # TODO: Be smarter about POI categories
>         sql_variables = (entry["lat"], entry["lon"], entry["title"],
> entry["summary"], 10)
>         sqlite_cursor.execute("insert into poi (lat, lon, label, desc,
> cat_id) values (?, ?, ?, ?, ?)", sql_variables)
>
> sqlite_connection.commit()
> sqlite_cursor.close()
> sqlite_connection.close()

Please help and let me know your terms.

Darius



From pavlovevidence at gmail.com  Mon Sep 17 04:27:51 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Mon, 17 Sep 2007 04:27:51 -0400
Subject: Try this
References: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>
	<13eqsdfsfvsa16f@corp.supernews.com>
	<1189969529.652871.19280@50g2000hsm.googlegroups.com>
	<mailman.621.1189970593.2658.python-list@python.org>
	<1189979679.969074.216490@y42g2000hsy.googlegroups.com>
	<1189981681.745195.18130@y42g2000hsy.googlegroups.com>
	<1189983233.709832.124290@19g2000hsx.googlegroups.com>
	<1189984913.956999.163100@n39g2000hsh.googlegroups.com>
	<1189990689.259451.232570@g4g2000hsf.googlegroups.com>
Message-ID: <46ee460b$0$19586$4c368faf@roadrunner.com>

On Sun, 16 Sep 2007 17:58:09 -0700, mensanator at aol.com wrote:
> The very presence of an algorithm to detect encoding is a bug. Files
> with they .txt extension should always be treated as ANSI even if they
> contain binary data. Notepad should never be allowed to try to decide
> what the encoding is if the the open dialog has the encoding set to
> ANSI.


I'm sure, then, you'll be happy to know that Python 3 will use similar 
(or maybe not similar) heuristics to determine the encoding of text 
files.  At least that was the case last time I checked.


FWIW, I'm not a big fan of heuristics, either (and this behavior would 
seriously irk me on Linux, where, unlike in Windows, there is an 
occasional need to create files containing only a small ascii string).  
But sometimes heuristics are necessary.  There's too many non-ascii text 
files floating around out there for Microsoft to do nothing; they have 
clients in many countries they have to please.



Carl Banks


From jwrweatherley at gmail.com  Sun Sep  2 09:45:16 2007
From: jwrweatherley at gmail.com (jwrweatherley at gmail.com)
Date: Sun, 02 Sep 2007 06:45:16 -0700
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
In-Reply-To: <1188735642.391419.103650@19g2000hsx.googlegroups.com>
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
	<1188735642.391419.103650@19g2000hsx.googlegroups.com>
Message-ID: <1188740716.423349.304370@y42g2000hsy.googlegroups.com>

[snip code]

Thanks for that. I realise that improving the algorithm will speed
things up. I wanted to know why my less than perfect algorithm was so
much slower in python than exactly the same algorithm in C. Even when
turning off gcc's optimiser with the -O0 flag, the C version is still
> 100 times quicker.



From mccredie at gmail.com  Wed Sep 26 13:00:47 2007
From: mccredie at gmail.com (Matimus)
Date: Wed, 26 Sep 2007 17:00:47 -0000
Subject: Python class method as an argument of a function in a C extension
In-Reply-To: <1190794562.037602.317840@22g2000hsm.googlegroups.com>
References: <1190794562.037602.317840@22g2000hsm.googlegroups.com>
Message-ID: <1190826047.552990.47310@n39g2000hsh.googlegroups.com>

> Can anybody give me an hint (or some link) on how to define
> 'aCFunction' and how to call 'self.myMethod' in the C source code?

A python function defined in C accepts a pointer to self and a tuple
of arguments, each of which is also a PyObject. If you pass a function
or method, it will be included in the tuple of arguments. I don't
think there is any difference between passing a method and a function.
You can call that method using functions in the `Object Protocol'
section of the API, such as PyObject_Call(...).

Here is an example from the Python documentation:
http://docs.python.org/ext/callingPython.html

The first part shows how to get a function as an argument. The
following bits of code show how to actually call that function.The
example uses PyEval_CallObject, which I can't find documentation to.
I'm not sure if it even exists (it may be a documentation error). But
from the example it seems to work exactly the same as
PyObject_CallObject.

Matt



From bbxx789_05ss at yahoo.com  Thu Sep 20 15:28:10 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Thu, 20 Sep 2007 12:28:10 -0700
Subject: subprocess: returncode v. poll()
In-Reply-To: <1190316312.929039.85670@o80g2000hse.googlegroups.com>
References: <1190315820.532320.26570@22g2000hsm.googlegroups.com>
	<1190316312.929039.85670@o80g2000hse.googlegroups.com>
Message-ID: <1190316490.165848.248300@w3g2000hsg.googlegroups.com>

On Sep 20, 1:25 pm, 7stud <bbxx789_0... at yahoo.com> wrote:
> On Sep 20, 1:17 pm, 7stud <bbxx789_0... at yahoo.com> wrote:
>
>
>
> > Hi,
>
> > What is the difference between:
>
> > 1) getting the returncode directly from the subprocess object
> > 2) calling poll() on the subprocess object?
>
> > Here is an example:
>
> > import subprocess
>
> > p = subprocess.Popen("ls", stdout=subprocess.PIPE)
> > print p.returncode
> > print p.poll()
> > print
>
> > print p.stdout.read()[:5]
> > print
>
> > print p.returncode
> > print p.poll()
> > print p.returncode
>
> > --output:--
> > None
> > None
>
> > 10tes
>
> > None
> > 0
> > 0
>
> Hmm....after a little more testing, I don't think returncode
> dynamically updates:
>
> import subprocess
> import time
>
> p = subprocess.Popen("ls", stdout=subprocess.PIPE)
>
> print p.returncode
> time.sleep(5)
> print p.returncode
> time.sleep(2)
> print p.returncode
>
> print p.stdout.read()[:5]
> print p.returncode
>
> --output:--
> None
> None
> None
> 10tes
> None

...but then when is p.returncode set?  And what good is it?



From duncan.booth at invalid.invalid  Thu Sep 27 03:32:03 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 27 Sep 2007 07:32:03 GMT
Subject: sorteddict PEP proposal [started off as orderedict]
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>
	<1190753722.026806.254530@d55g2000hsg.googlegroups.com>
	<1190756003.292096.71130@o80g2000hse.googlegroups.com>
	<1190789981.385466.37870@57g2000hsv.googlegroups.com>
	<Xns99B760A3F5859duncanbooth@127.0.0.1>
	<1190805297.182232.116830@50g2000hsm.googlegroups.com>
	<Xns99B7957CCE43Fduncanbooth@127.0.0.1>
	<1190815180.945099.248670@n39g2000hsh.googlegroups.com>
	<1190816657.574437.80980@g4g2000hsf.googlegroups.com>
	<1190820026.299569.110250@n39g2000hsh.googlegroups.com>
	<Xns99B7DE66C56F6duncanbooth@127.0.0.1>
	<1190846656.770087.173230@19g2000hsx.googlegroups.com>
Message-ID: <Xns99B85636C2565duncanbooth@127.0.0.1>

Paul Hankin <paul.hankin at gmail.com> wrote:

>> A key which is in dict must be either in __keycache or in __addkeys, but
>> never in both.
> 
> Yes, I'm sorry: you're right.
> 
> But there's a different bug: if you delete a key that's not in the
> dict, you'll add it to the deleted list before the exception for the
> missing key is raised.
> 
> sd = sorteddict.sorteddict()
> sd['a'] = 'a'
> print sd.keys() = ['a']
> try:
>     del sd['b']
> except:
>     pass
> sd['b'] = 'b'
> print sd.keys()
> 
> The second print statement produces ['a'] rather than ['a', 'b']

Yes, I think there are probably several cases where I need to account for 
exceptions.

There's another serious problem: if Mark wants this module to be used and 
stand any chance at all of eventually being incorporated into the standard 
library, then he will have to change the license on his code: the GPL 
simply isn't an option here.


From paul at boddie.org.uk  Thu Sep 20 05:24:36 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Thu, 20 Sep 2007 02:24:36 -0700
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
In-Reply-To: <1190242799.954176.279440@22g2000hsm.googlegroups.com>
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<dea92f560709021735l2c72d53ew94410fcb33b9b50b@mail.gmail.com>
	<mailman.303.1188779927.28954.python-list@python.org>
	<1190164166.378500.155990@o80g2000hse.googlegroups.com>
	<1190241711.344058.238380@57g2000hsv.googlegroups.com>
	<1190242799.954176.279440@22g2000hsm.googlegroups.com>
Message-ID: <1190280276.340286.240300@r29g2000hsg.googlegroups.com>

On 20 Sep, 00:59, TheFlyingDutchman <zzbba... at aol.com> wrote:
>
> Paul it's a pleasure to see that you are not entirely against
> complaints.

Well, it seems to me that I'm usually the one making them. ;-)

> The very fastest Intel processor of the last 1990's that I found came
> out in October 1999 and had a speed around 783Mhz. Current fastest
> processors are something like 3.74 Ghz, with larger caches.

True, although you're paying silly money for a 3.8 GHz CPU with a
reasonable cache. However, as always, you can get something not too
far off for a reasonable sum. When I bought my CPU two or so years
ago, there was a substantial premium for as little as 200 MHz over the
3.0 GHz CPU I went for, and likewise a 3.4 GHz CPU seems to be had for
a reasonable price these days in comparison to the unit with an extra
400 MHz.

Returning to the subject under discussion, though, one big difference
between then and now is the availability of dual core CPUs, and these
seem to be fairly competitive on price with single cores, although the
frequencies of each core are lower and you have to decide whether you
believe the AMD marketing numbers: is a dual 2.2 GHz core CPU "4200+"
or not, for example? One can argue whether it's better to have two
cores, especially for certain kinds of applications (and CPython,
naturally), but if I were compiling lots of stuff, the ability to do a
"make -j2" and have a decent speed-up would almost certainly push me
in the direction of multicore units, especially if the CPU consumed
less power. And if anyone thinks all this parallelism is just
hypothetical, they should take a look at distcc to see a fairly clear
roadmap for certain kinds of workloads.

> Memory is also faster and larger. It appears that someone running a non-GIL
> implementation of CPython today would have significantly faster
> performance than a GIL CPython implementation of the late 1990's.
> Correct me if I am wrong, but it seems that saying non-GIL CPython is
> too slow, while once valid, has become invalid due to the increase in
> computing power that has taken place.

Although others have picked over these arguments, I can see what
you're getting at: even if we take a fair proportion of the increase
in computing power since the late 1990s, rather than 100% of it,
CPython without the GIL would still faster and have more potential for
further speed increases in more parallel architectures, rather than
running as fast as possible on a "sequential" architecture where not
even obscene amounts of money will buy you significantly better
performance. But I don't think it's so interesting to consider this
situation as merely a case of removing the GIL and using lots of
threads.

Let us return to the case I referenced above: even across networks,
where the communications cost is significantly higher than that of
physical memory, distributed compilation can provide a good
performance curve. Now I'm not arguing that every computational task
can be distributed in such a way, but we can see that some
applications of parallelisation are mature, even mainstream. There are
also less extreme cases: various network services can be scaled up
relatively effectively by employing multiple processes, as is the UNIX
way; some kinds of computation can be done in separate processes and
the results collected later on - we do this with relational databases
all the time. So, we already know that monolithic multithreaded
processes are not the only answer. (Java put an emphasis on extensive
multithreading and sandboxing because of the requirements of running
different people's code side-by-side on embedded platforms with
relatively few operating system conveniences, as well as on Microsoft
Windows, of course.)

If the programmer cost in removing the GIL and maintaining a GIL-free
CPython ecosystem is too great, then perhaps it is less expensive to
employ other, already well-understood mechanisms instead. Of course,
there's no "global programmer lock", so everyone interested in doing
something about removing the GIL, writing their own Python
implementation, or whatever they see to be the solution can freely do
so without waiting for someone else to get round to it. Like those
more readily parallelisable applications mentioned above, more stuff
can get done provided that everyone doesn't decide to join the same
project. A lesson from the real world, indeed.

Paul



From BjornSteinarFjeldPettersen at gmail.com  Thu Sep 20 02:18:01 2007
From: BjornSteinarFjeldPettersen at gmail.com (thebjorn)
Date: Thu, 20 Sep 2007 06:18:01 -0000
Subject: Mixin classes and single/multiple inheritance
In-Reply-To: <87myviuee5.fsf@benfinney.id.au>
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au>
	<46f0fba0$0$29605$426a34cc@news.free.fr>
	<1190199134.791808.267110@22g2000hsm.googlegroups.com>
	<mailman.778.1190225664.2658.python-list@python.org>
	<1190256493.827576.139470@r29g2000hsg.googlegroups.com>
	<877immvye0.fsf_-_@benfinney.id.au>
	<1190257864.945639.199230@k79g2000hse.googlegroups.com>
	<87y7f2uhpp.fsf@benfinney.id.au>
	<1190262607.684957.49610@57g2000hsv.googlegroups.com>
	<87myviuee5.fsf@benfinney.id.au>
Message-ID: <1190269081.359324.57300@k79g2000hse.googlegroups.com>

On Sep 20, 6:52 am, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> Michele Simionato <michele.simion... at gmail.com> writes:
> > Since the language we have does have multiple inheritance, let's
> > use it to implement mixins.
> > ...
> > So, multiple inheritance is giving us very little for the point of
> > view of mixins; OTOH, multiple inheritance is giving us a lot of
> > headaches for what concerns cooperative methods.
>
> I may be obtuse, but the above statements seem to be professing
> contradictory viewpoints.

How so? A language doesn't need MI to have mixins (e.g. Ruby does
this). This doesn't seem to contradict that MI is, in general, a
horrible solution to most problems -- one example being the general
difficulty in groking cooperative (super) methods. A single-
inheritance language, otoh, is also a chore to work with (for a
specific subset of designs) -- unless there is _some_ way to do
mixins.  But for the general case I agree with Micele that delegation
is the better solution (Explicit is better than implicit).

> Do you think multiple inheritance should or should not be used in
> Python to do what mixins do?

Michele already answered this, Python has MI so it would just be
confusing to implement mixins any other way.

> > My point was that even if Python had been implemented without
> > multiple inheritance, it would have been simple to implement mixins,
> > or by copying the methods, or by dispatching with __getattr__.
>
> Can you give a code example of how you think mixins should be
> implemented in Python, assuming the absence of multiple inheritance?

Googling for "Ruby mixins tutorial" gave me the following link:
http://www.juixe.com/techknow/index.php/2006/06/15/mixins-in-ruby/

If I tell you that self.something is written @something in Ruby, and
inheritance is written class Base < Parent (as opposed to class
Base(Parent):) everything else should be understandable..?

How to implement include and extend in Python is left as an excercise
for the reader.

-- bjorn




From marcobonifazi at gmail.com  Thu Sep 20 05:18:25 2007
From: marcobonifazi at gmail.com (Marco Bonifazi)
Date: Thu, 20 Sep 2007 02:18:25 -0700
Subject: Python and RTF
In-Reply-To: <1190271676.160077.99270@w3g2000hsg.googlegroups.com>
References: <1190271676.160077.99270@w3g2000hsg.googlegroups.com>
Message-ID: <1190279905.435511.219510@r29g2000hsg.googlegroups.com>

On 20 Set, 09:01, Rufman <stephaneru... at gmail.com> wrote:
> Does anyone have a good rtf library for python, have exprience with
> pyRTF or a link to a good tutorial?
>
> thx Stephane

I have just used PyRtf to create a "report" with table and simple
images.

What is your question?

Marco Bonifazi
http://www.bonifazi.eu



From laurent.pointal at wanadoo.fr  Mon Sep  3 17:04:32 2007
From: laurent.pointal at wanadoo.fr (Laurent Pointal)
Date: Mon, 03 Sep 2007 23:04:32 +0200
Subject: Python object <-> XML
References: <1188849714.128121.139450@r34g2000hsd.googlegroups.com>
Message-ID: <46dc76e6$0$27389$ba4acef3@news.orange.fr>

Samuel wrote:

> Hi,
> 
> Say you have the following XML:
> 
> <item ref="1">
>   <name>item 1</name>
> </item>
> <item ref="2">
>   <name>item 2</name>
> </item>
> <group>
>   <item ref="1" />
>   <item ref="2" />
>   <name>my group</name>
> </group>
> 
> Is there an easy way (i.e. without writing a sax/dom parser) to load
> this into a (number of) Python object(s), manipulate the instance, and
> save the result back to XML?
> 
> -Samuel

I dont know if this suit your needs:

http://uche.ogbuji.net/tech/4suite/amara/

Take a look at the Amara Bindery:

http://uche.ogbuji.net/tech/4suite/etc/amara-manual.html#bindery

A+

Laurent.



From vijayeee at gmail.com  Tue Sep  4 09:42:09 2007
From: vijayeee at gmail.com (vijayca)
Date: Tue, 04 Sep 2007 13:42:09 -0000
Subject: Tkinter(2)
Message-ID: <1188913329.457394.94220@g4g2000hsf.googlegroups.com>

my python installation is:Active python 2.5.1
i am using Red Hat Linux
i have the Tkinter module installed but any simple script produces an
error....

script:
from Tkinter import Label
widget = Label(None, text='Hello GUI world!')
widget.pack()
widget.mainloop()


error:
Traceback (most recent call last):
  File "guy.py", line 2, in <module>
    widget = Label(None, text='Hello GUI world!')
  File "/root/Desktop/pythonall/ActivePython-2.5.1.1-linux-x86/
INSTALLDIR/lib/python2.5/lib-tk/Tkinter.py", line 2464, in __init__
    Widget.__init__(self, master, 'label', cnf, kw)
  File "/root/Desktop/pythonall/ActivePython-2.5.1.1-linux-x86/
INSTALLDIR/lib/python2.5/lib-tk/Tkinter.py", line 1923, in __init__
    BaseWidget._setup(self, master, cnf)
  File "/root/Desktop/pythonall/ActivePython-2.5.1.1-linux-x86/
INSTALLDIR/lib/python2.5/lib-tk/Tkinter.py", line 1898, in _setup
    _default_root = Tk()
  File "/root/Desktop/pythonall/ActivePython-2.5.1.1-linux-x86/
INSTALLDIR/lib/python2.5/lib-tk/Tkinter.py", line 1636, in __init__
    self.tk = _tkinter.create(screenName, baseName, className,
interactive, wantobjects, useTk, sync, use)
_tkinter.TclError: no display name and no $DISPLAY environment
variable


please help me....
i hate those error messages...
vijay



From m.n.summerfield at googlemail.com  Tue Sep 25 06:24:15 2007
From: m.n.summerfield at googlemail.com (Mark Summerfield)
Date: Tue, 25 Sep 2007 10:24:15 -0000
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <slrnffhmle.2ja.hat@se-162.se.wtb.tue.nl>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<slrnffhmle.2ja.hat@se-162.se.wtb.tue.nl>
Message-ID: <1190715855.858519.30540@50g2000hsm.googlegroups.com>

On 25 Sep, 10:53, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
> On 2007-09-25, Mark Summerfield <m.n.summerfi... at googlemail.com> wrote:
>
> > If there is positive feedback I will submit the PEP to the reviewers,
> > so if you think it is a good idea please say so. (I'm sure that if you
> > _don't_ like it you'll tell me anyway:-)
>
> I like the idea, ie +1.
>
> >     This PEP proposes the addition of a sorted dictionary class to the
> >     standard library's collections module.
>
> You don't seem to mention the sort criterium. I'd suggest to use the __lt__
> operator, which you probably intended since it is commonly used.

You are right that I implicitly use __lt__ (or __cmp__ if there's no
__lt__).

> Also, can I specify a custom sort function, as with list.sort() ?

No. That would make comparing two sorteddicts problematic. You can
always use munged string keys as my second example shows.

> >     In addition, the keys() method has two optional arguments:
>
> >     keys(firstindex : int = None, secondindex : int = None) -> list of
>
> Not sure this is a good idea. Wouldn't simply
>
> mysorteddict.keys()[firstindex:secondindex]
>
> be much better? It can do all you propose, and more (with iterators/generators
> and such). I see no need to implement it inside the sorteddict as well.

The reason for making it part of th

> >     Since the sorteddict's data is always kept in key order, indexes
> >     (integer offsets) into the sorteddict make sense.  Five additional
> >     methods are proposed to take advantage of this:
>
> >     key(index : int) -> value
>
> >     item(index : int) -> (key, value)
>
> >     value(index : int) -> key
>
> >     set_value(index : int, value)
>
> >     delete(index : int)
>
> I wouldn't do this. It breaks compability with the normal dict. A beginning
> user will expect dict and sorteddict to behave the same (except for
> sortedness), including their set of supporting functions imho.
>
> Otherwise, please make a case for them (and maybe even a new PEP to get them in
> both types of dicts).
>
> > Examples
>
> >     To keep a collection of filenames on a case-insensitive file
> > system in
> >     sorted order, we could use code like this:
>
> >         files = collections.sorteddict.sorteddict()
> >         for name in os.listdir("."):
> >             files[name.lower()] = name
>
> The more interesting case would be to you preserve case of the files within the
> keys.
>
> I usually need this data structure with an A* algorithm implementation, where I
> need to obtain the cheapest solution found so far.
>
> >         for item in listOfItems:
> >             itemsByDate["%s\t%17X" % (item.date, id(item))] = item
> >             itemsByName["%s\t%17X" % (item.name, id(item))] = item
> >             itemsBySize["%s\t%17X" % (item.size, id(item))] = item
>
> Wouldn't a line like "itemsBySize[(item.size, id(item))] = item" do as well?
>
> (or with a custom sort function on items?)
>
> >     Now we can iterate in date or name order, for example:
>
> >         for item in itemsByDate:
> >             print item.name, item.date
>
> Hmm, not with dict:
>
> >>> for x in {1:10, 2:20}:
>
> ...   print x
> ...
> 1
> 2
>
> So you should get your "%s\t%17X" strings here.
>
> Sincerely,
> Albert




From zentraders at gmail.com  Sat Sep 29 15:38:09 2007
From: zentraders at gmail.com (Zentrader)
Date: Sat, 29 Sep 2007 19:38:09 -0000
Subject: question about for cycle
In-Reply-To: <1191079144.724699.250470@o80g2000hse.googlegroups.com>
References: <mailman.1275.1191060311.2658.python-list@python.org>
	<1191073123.459709.98870@g4g2000hsf.googlegroups.com>
	<mailman.1278.1191076522.2658.python-list@python.org>
	<1191079144.724699.250470@o80g2000hse.googlegroups.com>
Message-ID: <1191094689.726813.235340@50g2000hsm.googlegroups.com>

On Sep 29, 8:19 am, George Sakkis <george.sak... at gmail.com> wrote:
> On Sep 29, 10:34 am, "fdu.xia... at gmail.com" <fdu.xia... at gmail.com>
> wrote:
>
>
>
> > tokl... at gmail.com wrote:
>
> >  > On 29 sep, 12:04, "fdu.xia... at gmail.com" <fdu.xia... at gmail.com> wrote:
>
> >  >> for i in generator_a:  # the first "for" cycle
> >  >>      for j in generator_b:
> >  >>          if something_happen:
> >  >>              # do something here ..., I want the outer cycle to break
> >  >>              break
>
> >  > Do you like this?
>
> >  > generator_ab = ((x, y) for x in generator_a for y in generator_b)
> >  > for i, j in generator_ab:
> >  >     if condition:
> >  >         # do something
> >  >         break
>
> >   In this case, the tuple generator_ab must be generated first.
> George

You can get specific break points by expanding the for loop into a
while loop, and this is perhaps why it has never been implemented with
for loops.
ctr_a=0
ctr_b=0
while ctr_a < len(generator_a):
     this_el_a = generator_a[ctr_a]

     while ctr_b <  len(generator_b):
         this_el_b = generator_b[ctr_ b]
         if something_happen:
             ctr_b = len(generator_b)       ## break this loop
         if something_else:
             ctr_a = len(generator_a)       ## break outer while loop
         ctr_b += 1
     ctr_a += 1



From scottishguy at gmail.com  Tue Sep 11 08:17:55 2007
From: scottishguy at gmail.com (scottishguy)
Date: Tue, 11 Sep 2007 12:17:55 -0000
Subject: Mac OSX sqlite problem. Missing?
In-Reply-To: <1189489594.584753.312330@g4g2000hsf.googlegroups.com>
References: <1189455305.994439.107100@r34g2000hsd.googlegroups.com>
	<5klocbF498ruU1@mid.uni-berlin.de>
	<1189457469.285055.212670@r29g2000hsg.googlegroups.com>
	<1189489594.584753.312330@g4g2000hsf.googlegroups.com>
Message-ID: <1189513075.665508.245570@50g2000hsm.googlegroups.com>

On Sep 11, 2:46 am, "attn.steven.... at gmail.com"
<attn.steven.... at gmail.com> wrote:
> On Sep 10, 1:51 pm, ricardo.turp... at gmail.com wrote:
>
>
>
> > Diez B. Roggisch wrote:
>
> > > Are you by any chance using the python 2.3 when issuing that import
> > > statement?
>
> > > Diez
>
> > Unfortunately not :(
>
> > ibook:~/project1$ python -V
> > Python 2.5
> > ibook:~/project1$ python
> > Python 2.5 (r25:51918, Sep 19 2006, 08:49:13)
> > [GCC 4.0.1 (Apple Computer, Inc. build 5341)] on darwin
> > Type "help", "copyright", "credits" or "license" for more information.>>> import sqlite
>
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in <module>
> > ImportError: No module named sqlite
>
> Isn't it sqlite3 (instead of sqlite)?
>
> Python 2.5.1c1 (r251c1:54692, Apr 17 2007, 21:12:16)
> [GCC 4.0.0 (Apple Computer, Inc. build 5026)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.>>> import sqlite3
> >>> sqlite3.Connection
>
> <type 'sqlite3.Connection'>>>> sqlite3.Connection.__doc__
>
> 'SQLite database connection object.'
>
>
>
> I also see it under that name in the repository:
>
>    http://svn.python.org/view/python/trunk/Lib/sqlite3/
>
> --
> Hope this helps,
> Steven

The problem is that the user is trying to install the turbogears
framework, and 'tg-admin' tries to import sqlite (not sqlite3)

He's getting this error:
 'import sqlite.  ImportError: No module named sqlite'.

Without changing the turbogears code, what should he do? Set up a
symbolic link from 'sqlite3' to 'sqlite' ?



From cjw at sympatico.ca  Fri Sep 28 16:55:20 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Fri, 28 Sep 2007 16:55:20 -0400
Subject: Python 3.0 migration plans?
In-Reply-To: <46FD40A5.8030504@holdenweb.com>
References: <mailman.1195.1190936289.2658.python-list@python.org>	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>	<87641v4j38.fsf@benfinney.id.au>	<1190949502.875203.57690@w3g2000hsg.googlegroups.com>	<5m3p1dFbl98pU1@mid.uni-berlin.de>	<1190968707.799398.232550@19g2000hsx.googlegroups.com>	<5m4126FbgjabU1@mid.uni-berlin.de>	<1190993122.979034.305060@50g2000hsm.googlegroups.com>	<mailman.1236.1190995515.2658.python-list@python.org>	<1190997769.002795.59450@57g2000hsv.googlegroups.com>	<5m4qc2Fbbk19U1@mid.uni-berlin.de>	<1191000394.828693.285210@k79g2000hse.googlegroups.com>
	<46FD40A5.8030504@holdenweb.com>
Message-ID: <46FD6A38.5070606@sympatico.ca>

Steve Holden wrote:
> TheFlyingDutchman wrote:
>> On Sep 28, 10:01 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>>> On Fri, 28 Sep 2007 09:42:49 -0700, TheFlyingDutchman wrote:
>>>> Which of the common languages have higher order functions and what is
>>>> the syntax?
>>> C, C++, Pascal, Perl, PHP, Ruby have them.  And of course the functional
>>> languages, most notably Lisp and Scheme as you asked for common languages.
>>>
>>> Don't know if C#'s delegates qualify.
>>>
>>> Ciao,
>>>         Marc 'BlackJack' Rintsch
>> What is the syntax of a higher order function in C, C++ and Pascal?
>>
> This is like listening to a four-year-old torment its parents with 
> incessant questions. Do you *have* to ask every question that pops into 
> your mind?
> 
> regards
>   Steve
Tut Tut!

A reasonable question is being asked.

Colin W.


From bj_666 at gmx.net  Wed Sep 12 03:33:52 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 12 Sep 2007 07:33:52 GMT
Subject: Python Problem
References: <l404e316v2lknjsfrct9nlcs2jl9206qrf@4ax.com>
	<pl6ee3hutvaf3s8399upqq4tap4bqn7r8m@4ax.com>
	<slrnfef44e.1di.hat@se-162.se.wtb.tue.nl>
Message-ID: <5kpj30F4s6gmU1@mid.uni-berlin.de>

On Wed, 12 Sep 2007 09:09:02 +0200, A.T.Hofkamp wrote:

> On 2007-09-11, Wiseman <mickey at disney.com> wrote:
>>
>>  Hi,
>>
>> OK - it works in WindowsXP.
>> I installed "enchant" on my SuSE 10.0 (using YAST). 
>> The enchant Suse package looks like a general Linux package, not a
>> Python specific.
> 
> You'd seem to be right judging by this web-page:
> http://www.novell.com/products/linuxpackages/suselinux/enchant.html
> 
> As you can see, there is no file installed at a path with "python" in it.
> 
>> What am I missing?
> 
> Python bindings to the library perhaps?
> You may be more lucky with an enchant-dev package (if it exists). I am however
> not a Suse user and not an echant user (well, not from my Python code at least).

PyEnchant seems to be an independent project:

  http://pyenchant.sourceforge.net/

So there is either an extra package for SuSE or the OP has to build it
himself.

Ciao,
	Marc 'BlackJack' Rintsch


From fukazawa at gmail.com  Tue Sep 25 23:11:43 2007
From: fukazawa at gmail.com (Andy)
Date: Wed, 26 Sep 2007 03:11:43 -0000
Subject: stopping a while True: with the keyboard
In-Reply-To: <mailman.1073.1190775523.2658.python-list@python.org>
References: <mailman.1071.1190769576.2658.python-list@python.org>
	<1190774898.348656.190760@y42g2000hsy.googlegroups.com>
	<mailman.1073.1190775523.2658.python-list@python.org>
Message-ID: <1190776303.793648.292610@d55g2000hsg.googlegroups.com>

Hi,

I think you can use the 'curses' module to catch the keyboard event.
The name of the method is 'keyname()'.  But I'm afraid curses is not
available on Windows Python, so you may have to be a bit more
imaginative.  I just tried with Python 2.4 on Windows XP.

To leave the while loop, use the 'break' command.

Andy



From deets at nospam.web.de  Tue Sep 25 07:19:07 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 25 Sep 2007 13:19:07 +0200
Subject: What is a good way of having several versions of a python module
	installed in parallell?
References: <fdai0b$7iv$1@news.lysator.liu.se>
Message-ID: <5ls95aF9pq3gU1@mid.uni-berlin.de>

Joel Hedlund wrote:

> Hi!
> 
> I write, use and reuse a lot of small python programs for variuos purposes
> in my work. These use a growing number of utility modules that I'm
> continuously developing and adding to as new functionality is needed.
> Sometimes I discover earlier design mistakes in these modules, and rather
> than keeping old garbage I often rewrite the parts that are
> unsatisfactory. This often breaks backwards compatibility, and since I
> don't feel like updating all the code that relies on the old (functional
> but flawed) modules, I'm left with a hack library that depends on halting
> versions of my utility modules. The way I do it now is that I update the
> programs as needed when I need them, but this approach makes me feel a bit
> queasy. It seems to me like I'm thinking about this in the wrong way.
> 
> Does anyone else recognize this situation in general? How do you handle
> it?
> 
> I have a feeling it should be possible to have multiple versions of the
> modules installed simultaneously, and maybe do something like this:
> 
> mymodule/
> + mymodule-1.1.3/
> + mymodule-1.1.0/
> + mymodule-0.9.5/
> - __init__.py
> 
> and having some kind of magic in __init__.py that let's the programmer
> choose version after import:
> 
> import mymodule
> mymodule.require_version("1.1.3")
> 
> Is this a good way of thinking about it? What would be an efficient way of
> implementing it?

Use setuptools. It can exactly do that - install different versions parallel
as eggs, and with a pre-import require-statment you require the desired
one.

Diez


From redtiger84 at googlemail.com  Wed Sep 12 05:27:39 2007
From: redtiger84 at googlemail.com (Christoph Krammer)
Date: Wed, 12 Sep 2007 09:27:39 -0000
Subject: MemoryError on reading mbox file
Message-ID: <1189589259.662667.149730@w3g2000hsg.googlegroups.com>

Hello everybody,

I have to convert a huge mbox file (~1.5G) to MySQL.

I tried with the following simple code:

for m in mailbox.mbox(fileName):

  msg  = m.as_string(True)
  hash = md5.new(msg).hexdigest()

  try:
    dbcurs.execute("""INSERT INTO archive (hash, msg) VALUES (%s,
%s)""", (hash, msg))
  except MySQLdb.OperationalError, err:
    print "%s  Error (%d): %s" % (file, err[0], err[1])
  else:
    print "%s: Message successfully added to database" % (hash,
spamSource)

The problem seems to be the size of file, every time I try to execute
the script, after about 20000 messages, the following error occurs:

Traceback (most recent call last):
  File "email_to_mysql_mbox.py", line 21, in <module>
    for m in mailbox.mbox(fileName):
  File "/usr/lib/python2.5/mailbox.py", line 98, in itervalues
    value = self[key]
  File "/usr/lib/python2.5/mailbox.py", line 70, in __getitem__
    return self.get_message(key)
  File "/usr/lib/python2.5/mailbox.py", line 633, in get_message
    string = self._file.read(stop - self._file.tell())
MemoryError

My system has 512M RAM and 768M swap, which seems to run out at an
early stage of this. Is there a way to clean up memory for messages
already processed?

Thanks and regards,
 Christoph



From shankarjee at gmail.com  Thu Sep 13 09:28:27 2007
From: shankarjee at gmail.com (Shankarjee Krishnamoorthi)
Date: Thu, 13 Sep 2007 08:28:27 -0500
Subject: File Parsing Question
In-Reply-To: <fcamhi$821$00$1@news.t-online.com>
References: <mailman.455.1189630858.2658.python-list@python.org>
	<1189634861.631219.143310@57g2000hsv.googlegroups.com>
	<mailman.456.1189636092.2658.python-list@python.org>
	<13ehmjf33b3d029@corp.supernews.com>
	<fcamhi$821$00$1@news.t-online.com>
Message-ID: <ead600e10709130628r58108ecl7414f7c322c67984@mail.gmail.com>

Great. That worked for me. I had some of my routines implemented in
Perl earlier. Now that I started using Python I am trying to do all my
automation scripts with Python. Thanks a ton

Jee

On 9/13/07, Peter Otten <__peter__ at web.de> wrote:
> Dennis Lee Bieber wrote:
>
> >  for line in inp:
> >
> > will read one line at a time (I'm fairly sure the iterator doesn't
> > attempt to buffer multiple lines behind the scenes)
>
> You are wrong:
>
> >>> open("tmp.txt", "w").writelines("%s\n" % (9*c) for c in "ABCDE")
> >>> instream = open("tmp.txt")
> >>> for line in instream:
> ...     print instream.tell(), line.strip()
> ...
> 50 AAAAAAAAA
> 50 BBBBBBBBB
> 50 CCCCCCCCC
> 50 DDDDDDDDD
> 50 EEEEEEEEE
> >>>
>
> Here's the workaround:
>
> >>> instream = open("tmp.txt")
> >>> for line in iter(instream.readline, ""):
> ...     print instream.tell(), line.strip()
> ...
> 10 AAAAAAAAA
> 20 BBBBBBBBB
> 30 CCCCCCCCC
> 40 DDDDDDDDD
> 50 EEEEEEEEE
> >>>
>
> Peter
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From bronger at physik.rwth-aachen.de  Wed Sep  5 19:36:36 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Thu, 06 Sep 2007 01:36:36 +0200
Subject: Any syntactic cleanup likely for Py3? And what about doc
	standards?
References: <46DEFD2E.5050205@sbcglobal.net>
	<mailman.112.1189022368.2658.python-list@python.org>
	<87tzq898e2.fsf@wilson.homeunix.com>
	<mailman.118.1189034379.2658.python-list@python.org>
Message-ID: <87ejhc8z23.fsf@wilson.homeunix.com>

Hall?chen!

Ferenczi Viktor writes:

> [...]
>
> Properties are very useful, since ordinary attribute access can be
> transparently replaced with properties if the developer needs to
> add code when it's set or needs to calculate it's value whenever
> it is read.

I totally agree.  I like to use properties.  However, Python already
has properties.  Their syntax is quite nice in my opinion, and
rather explicit, too.  Their only flaw is that they are not
"virtual" (in C++ speak).  In other words, you can't pass a "self"
parameter to them.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From __peter__ at web.de  Wed Sep 19 03:54:38 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 19 Sep 2007 09:54:38 +0200
Subject: Help, I'm going mad with this
References: <1190173561.822713.200070@d55g2000hsg.googlegroups.com>
Message-ID: <fcqkju$7fp$00$1@news.t-online.com>

azrael wrote:

> Help, I'm going mad with this

Is "Otsu threshold algorithm" to boring as a subject?

> Meanwhile I tried about 5 different implementations of the otsu
> threshold algorithm. I'll go mad.
> Please help me. I don't know what to do. I even tried to implement it
> from c and java, but no way. nothing.
> I've been reading about 5 ppt presentations and 4 pdf's and I failed.
> Can someone look at this code.
> If needed I can paste 3 other codes.

Hmm, you just learned that quality is more important than quantity then.
Choose the text that seems most accessible while still complete and try to
understand it.

> if __name__=="__main__":
>     otsu(histogram)

You are using a parameter before defining it. It seems you have not yet
groked the basics of cut and past then.

>     histogram= [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
> 0, 0, 0, 0, 0, 0, 0, 1, 0, 2, 0, 0, 2, 1, 2, 0, 1, 3, 3, 3, 3, 1, 3,
> 1, 3, 5, 2, 3, 3, 3, 6, 3, 4, 5, 4, 9, 6, 11, 6, 10, 3, 11, 9, 9, 12,
> 22, 18, 34, 22, 28, 32, 25, 34, 38, 34, 54, 65, 106, 160, 167, 203,
> 282, 364, 446, 637, 816, 1022, 1264, 1456, 1646, 1753, 1845, 1922,
> 2203, 2231, 1973, 2245, 2369, 2349, 2258, 2130, 2066, 1835, 1640,
> 1554, 1414, 1179, 1024, 974, 938, 838, 785, 756, 803, 921, 952, 865,
> 722, 625, 608, 547, 498, 412, 438, 408, 413, 415, 339, 366, 330, 320,
> 293, 315, 368, 411, 434, 500, 531, 538, 552, 665, 811, 869, 998, 1021,
> 1075, 1080, 1030, 934, 926, 1074, 942, 941, 1014, 1440, 2966, 5301,
> 2729, 3400, 5563, 13096, 9068, 6045, 2813, 686, 180]
> 
> 
> Well, this list is a example list that i have exported. for this list
> the result the threshold should be at 218.

If you need the result and don't want to bother with understanding the
algorithm -- I found an implementation in C via Google Codesearch 

http://www.google.com/codesearch?hl=de&q=+otsu+threshold+show:3rXPo8eEzw0:z-1MzowD-bQ:cDGSVzqKA7M&sa=N&cd=1&ct=rc&cs_p=http://www.studio-to-go.co.uk/source-packages/2.x/gocr-0.41.tar.bz2&cs_f=gocr-0.41/src/otsu.c#a0

It gives the desired result if you use the line that is commented out

// orig: sb ...

instead of its current replacement. Translation to Python should be
straightforward, but you can ask on c.l.py if you run into problems.

Peter


From ldo at geek-central.gen.new_zealand  Sun Sep  9 22:58:02 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 10 Sep 2007 14:58:02 +1200
Subject: Does shuffle() produce uniform result ?
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
	<mailman.243.1187955760.32294.python-list@python.org>
	<tooru_honda-7C82D1.10432725082007@wvnews01.netvigator.com>
	<tooru_honda-58C552.20355225082007@wvnews01.netvigator.com>
	<tooru_honda-978B9E.11304526082007@wvnews01.netvigator.com>
	<slrnfdnojg.inr.apardon@rcpc42.vub.ac.be>
	<7xejhfbsjo.fsf@ruckus.brouhaha.com>
	<slrnfdpup6.inr.apardon@rcpc42.vub.ac.be>
	<7xabs39bin.fsf@ruckus.brouhaha.com>
	<13drijhfqlvlk96@corp.supernews.com> <fbvmg0$1p3$3@lust.ihug.co.nz>
	<7xhcm4pl5m.fsf@ruckus.brouhaha.com> <fc059c$aa2$6@lust.ihug.co.nz>
	<7xsl5ndau8.fsf@ruckus.brouhaha.com>
Message-ID: <fc2brq$i1l$1@lust.ihug.co.nz>

In message <7xsl5ndau8.fsf at ruckus.brouhaha.com>, Paul Rubin wrote:

> Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> writes:
>> > ... and it's to NSA's credit that SHA-1 held up for as long as it did.
>> But they have no convincing proposal for a successor. That means the gap
>> between the classified and non-classified state of the art has shrunk
>> down to insignificance.
> 
> The successor is SHA-2.

According to this <http://en.wikipedia.org/wiki/SHA-1>, the family of
algorithms collectively described as "SHA-2" is by no means a definitive
successor to SHA-1.


From andre.roberge at gmail.com  Fri Sep  7 08:31:22 2007
From: andre.roberge at gmail.com (=?iso-8859-1?B?QW5kcuk=?=)
Date: Fri, 07 Sep 2007 12:31:22 -0000
Subject: Is a Borg rebellion possible?   (a metaclass question)
Message-ID: <1189168282.665210.260840@19g2000hsx.googlegroups.com>

In my application, I make use of the Borg idiom, invented by Alex
Martelli.

class Borg(object):
    '''Borg Idiom, from the Python Cookbook, 2nd Edition, p:273

    Derive a class form this; all instances of that class will share
the
    same state, provided that they don't override __new__; otherwise,
    remember to use Borg.__new__ within the overriden class.
    '''
    _shared_state = {}
    def __new__(cls, *a, **k):
        obj = object.__new__(cls, *a, **k)
        obj.__dict__ = cls._shared_state
        return obj

----
This has worked very well so far, but is starting to impose some
unwanted constraints on my program design.

What I would like to do is, to put it figuratively, create a Borg
rebellion with various splinter groups.  In concrete Python terms, I
would like to have

class MyClass(Borg, ...):
   ...

seven_of_nine = MyClass(...)  # part of group "BORG"
two_of_nine = MyClass(...)

splinter1 = MyClass(..., group='splinter')
splinter2 = MyClass(..., group='splinter')

and have splinter 1 and splinter2 share the same state, but a
different state than the one shared by members of the BORG collective.

Any suggestions from the metaclass experts?

Andr?



From malibuster at gmail.com  Wed Sep  5 17:17:40 2007
From: malibuster at gmail.com (malibuster at gmail.com)
Date: Wed, 05 Sep 2007 14:17:40 -0700
Subject: Text processing and file creation
In-Reply-To: <1189024097.175349.221210@w3g2000hsg.googlegroups.com>
References: <1189008809.718361.45790@g4g2000hsf.googlegroups.com>
	<1189024097.175349.221210@w3g2000hsg.googlegroups.com>
Message-ID: <1189027060.889829.282510@r34g2000hsd.googlegroups.com>

On Sep 5, 1:28 pm, Paddy <paddy3... at googlemail.com> wrote:
> On Sep 5, 5:13 pm, "malibus... at gmail.com" <malibus... at gmail.com>
> wrote:
>
> > I have a text source file of about 20.000 lines.>From this file, I like to write the first 5 lines to a new file. Close
>
> > that file, grab the next 5 lines write these to a new file... grabbing
> > 5 lines and creating new files until processing of all 20.000 lines is
> > done.
> > Is there an efficient way to do this in Python?
> > In advance, thanks for your help.
>
> If its on unix: use split.
> If its your homework: show us what you have so far...
>
> - Paddy.

Paddy,

Thanks for making me aware of the (UNIX) split command (split -l 5
inFile.txt), it's short, it's fast, it's beautiful.

I am still wondering how to do this efficiently in Python (being kind
of new to it... and it's not for homework).

-- Martin.


I am still wondering how to do this in Python (being new to Python)



From jura.grozni at gmail.com  Sat Sep  1 18:44:18 2007
From: jura.grozni at gmail.com (azrael)
Date: Sat, 01 Sep 2007 22:44:18 -0000
Subject: Pivy problem and some other stuff
In-Reply-To: <13df1kmak87mbb@corp.supernews.com>
References: <1188501707.593319.23330@m37g2000prh.googlegroups.com>
	<5jom54Fh543U2@mid.uni-berlin.de>
	<13df1kmak87mbb@corp.supernews.com>
Message-ID: <1188686658.296058.56960@57g2000hsv.googlegroups.com>

Look, what I think about is this.
I'd like to make a multi dimensional list in which evry single element
would represent a function. By looping through the list I would
execute the functions. But not only that, it is possible to experiment
with recoursions.
the return 1 2 and 3 examples are just a examples. Of course that the
thing I'm thinking about is a little bit more complex.



From daniel.j.larsson at gmail.com  Wed Sep  5 10:43:11 2007
From: daniel.j.larsson at gmail.com (Daniel Larsson)
Date: Wed, 5 Sep 2007 16:43:11 +0200
Subject: Checking if elements are empty
In-Reply-To: <4866bea60709050736t5f9f6759x4a8b685bc9ad4ec@mail.gmail.com>
References: <2323A6D37908A847A7C32F1E3662C80E010A0246@dc1ex01.air.org>
	<fbme5d$qa$1@sea.gmane.org>
	<4866bea60709050736t5f9f6759x4a8b685bc9ad4ec@mail.gmail.com>
Message-ID: <2bfa72fa0709050743t66a6a399mdc6cd77b7ea43ee9@mail.gmail.com>

On 9/5/07, Chris Mellon <arkanes at gmail.com> wrote:
>
> On 9/5/07, Steve Holden <steve at holdenweb.com> wrote:
> > Doran, Harold wrote:
>
> > >
> > > Is there a way to check if the first element of y is null?
> > >
> >
> > len(y[0]) == 0
> >
> > would be the obvious way, assuming "null" means "the null string".
> >
>
> Better spelled as
>
> if y[0]:


Even better spelled as

if not y[0]:

;-)

--
> http://mail.python.org/mailman/listinfo/python-list
>
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From garyrob at mac.com  Thu Sep  6 11:43:26 2007
From: garyrob at mac.com (Gary Robinson)
Date: Thu, 6 Sep 2007 11:43:26 -0400
Subject: getting the current function
Message-ID: <20070906114326335905.d48a6c2b@mac.com>

Alex Martelli has a cookbook recipe, whoami, for retrieving the name of the current function: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/66062. It uses sys._getframe(). I'm a little wary about using sys._getframe() because of the underscore prefix and the fact that the python docs say "This function should be used for internal and specialized purposes only." 

I feel more comfortable using the equivalent functionality in the inspect module.

Also, I wanted a way to get access to the current function, not just its name.

I came up with:

import inspect

def thisfunc(n=0):
    currentFrame = inspect.currentframe()
    outerFrames = inspect.getouterframes(currentFrame)
    callingFrame = outerFrames[n + 1][0]
    callersCallingFrame = outerFrames[n + 2][0]
    return callersCallingFrame.f_locals[callingFrame.f_code.co_name]

The n argument lets you go up the stack to get callers of callers if that's convenient. For instance:

def attr(name, value):
    caller = thisfunc(1)
    if not hasattr(caller, name):
        setattr(caller, name, value)
    
def x():
    attr('counter', 0)
    thisfunc().counter += 1
    print thisfunc().counter
    
x()
x()
x()

Returns the output

1
2
3

Of course you don't need an attr() function for creating a function attribute, but this way your code won't break if you change the name of the function.

I was about to create a cookbook recipe, but decided to ask for some feedback from the community first. 

Do you see situations where this function wouldn't work right?

Also, the python docs warn about storing frame objects due to the possibility of reference cycles being created (http://docs.python.org/lib/inspect-stack.html). But I don't think that's a worry here since thisfunc() stores the references on the stack rather than the heap. But I'm not sure. Obviously, it would be easy to add a try/finally with appropriate del's, but I don't want to do it if it's not necessary.

I welcome feedback of any type.

Thanks,
Gary




-- 

Gary Robinson
CTO
Emergent Music, LLC
garyrob at mac.com
207-942-3463
Company: http://www.goombah.com
Blog:    http://www.garyrobinson.net


From martijn at gamecreators.nl  Wed Sep 19 06:02:17 2007
From: martijn at gamecreators.nl (martijn at gamecreators.nl)
Date: Wed, 19 Sep 2007 03:02:17 -0700
Subject: still get a <defunct> using a python script in the crontab
Message-ID: <1190196137.140718.198510@n39g2000hsh.googlegroups.com>

H!

I have made a program that is checking if a program is running or not.
If the program is not running then it must start the program again.

in the /etc/crontab:
*     *       *       *       *       root    /usr/sbin/
program_prgchk

in the /usr/sbin/program_prgchk:
/usr/local/bin/python /home/reseller/domeinaanvraag/program_prgchk.py


in the program_prgchk.py:
----------------------------------------
import string
import os
import commands

def checkifrunning():
    line = string.strip(commands.getoutput("ps x -o pid,command | grep
program_reseller.py | grep -v 'grep'"))
    pid = string.split(line,' ')[0]
    if pid<>'':pid = int(pid)
    return pid

if checkifrunning()=='':
    os.system('/usr/sbin/program_reseller')
#    os.wait()
#    os.waitpid(checkifrunning(),0)

os._exit(0)


If I run the command /usr/sbin/program_prgchk everything works (no
<defunct> process)
But when I use it in the crontab I get a <defunct> process

Thanks for helping,
GC-Martijn



From wangzq at gmail.com  Wed Sep 12 21:45:03 2007
From: wangzq at gmail.com (wangzq)
Date: Thu, 13 Sep 2007 01:45:03 -0000
Subject: Get the complete command line as-is
In-Reply-To: <fc83v4$cb3$1@news2.u-psud.fr>
References: <1189566000.793354.308420@19g2000hsx.googlegroups.com>
	<fc83v4$cb3$1@news2.u-psud.fr>
Message-ID: <1189647903.978946.38350@r29g2000hsg.googlegroups.com>

On Sep 12, 3:20 pm, Laurent Pointal <laurent.poin... at limsi.fr> wrote:
> wangzq a ?crit :
>
> > Hello,
>
> > I'm passing command line parameters to my browser, I need to pass the
> > complete command line as-is, for example:
>
> > test.py "abc def" xyz
>
> > If I use ' '.join(sys.argv[1:]), then the double quotes around "abc
> > def" is gone, but I need to pass the complete command line ("abc def"
> > xyz) to the browser, how can I do this?
>
> > I'm on Windows.
>
> As Windows command-line parsing seem to remove some chars, maybe you can
> try to use the GetCommandLine() function from Win32 API (I dont know if
> it is available in pywin32 package - you may need to write a wrapper
> with ctypes).
>
> Seehttp://msdn2.microsoft.com/en-us/library/ms683156.aspx
>
> A+
>
> Laurent.

Thank you for the tip. It works:

import ctypes

p = ctypes.windll.kernel32.GetCommandLineA()
print ctypes.c_char_p(p).value

Now I only need to split the whole command line into 3 parts and get
the last one.

Thanks for all your input.




From gagsl-py2 at yahoo.com.ar  Sat Sep 29 22:45:59 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 29 Sep 2007 23:45:59 -0300
Subject: Command-line does work when scheduled
References: <1191098074.342460.52130@n39g2000hsh.googlegroups.com>
	<mailman.1289.1191100817.2658.python-list@python.org>
	<1191104269.578536.56470@g4g2000hsf.googlegroups.com>
	<mailman.1291.1191113688.2658.python-list@python.org>
	<1191114246.668635.327080@o80g2000hse.googlegroups.com>
Message-ID: <op.tzf4mxy3x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 29 Sep 2007 22:04:06 -0300, Jim <jscrerar at compuserve.com> escribi?:

>> If it works this way, maybe the .py file extension is not correctly
>> registered.
>
> Yes, it works this way.
> How do I register the .py extension correctly?

 From a command line, type:
assoc .py
You should get:
.py=Python.File
If you get an error, or another thing like py_auto_file:
assoc .py=Python.File

Then:
ftype Python.File
You should get:
Python.File=c:\path\to\python.exe "%1" %*
If you don't:
ftype Python.File=c:\path\to\python.exe "%1" %*

The %* at the end is important: if you created the association by using  
"Open with...", or selecting Python from the list of installed programs,  
very likely the command says only "%1" - that is, the script being open,  
but without any additional arguments.

Better if you have administrative rights to do this tasks.

-- 
Gabriel Genellina



From openopt at ukr.net  Sun Sep  2 16:28:26 2007
From: openopt at ukr.net (dmitrey)
Date: Sun, 02 Sep 2007 13:28:26 -0700
Subject: howto reload Python module?
Message-ID: <1188764906.354022.86370@50g2000hsm.googlegroups.com>

my Python module was changed in HDD (hardware disk drive), moreover,
changed its location (but still present in sys.path).
how can I reload a func "myfunc"  from the module? (or howto reload
whole module)?
Thank you in advance, D.



From ricaraoz at gmail.com  Sat Sep  1 09:33:42 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Sat, 01 Sep 2007 10:33:42 -0300
Subject: list index() (OT)
In-Reply-To: <fbbnvs$nhb$1@sea.gmane.org>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>	<1cnfd31du01el95u70o8mjn9cb5r5aluiu@4ax.com>	<mailman.254.1188629922.28954.python-list@python.org>	<1188631457.050512.103060@y42g2000hsy.googlegroups.com>	<46D95EEC.2000603@bigfoot.com>
	<fbbnvs$nhb$1@sea.gmane.org>
Message-ID: <46D96A36.1050006@bigfoot.com>

Steve Holden wrote:
> Ricardo Ar?oz wrote:
>> Paddy wrote:
>>> On Sep 1, 7:57 am, "Hendrik van Rooyen" <m... at microcorp.co.za> wrote:
>>>> "Richie Hindle" <richi...ian.com> wrote:
>>>>> But - the word for someone who posts to the internet with the intention of
>>>>> stirring up trouble derives from the word for what fishermen do, not from
>>>>> the word for something that lives under a bridge.  It derives from "trolling
>>>>> for suckers" or "trolling for newbies".
>>>> So am I right in asserting that there is a difference in pronunciation
>>>> of the noun and the verb?
>>>>
>>>> He is a Troll - like the excellent frolic example
>>>> He likes to Troll - rhymes with roll?
>>>>
>>>> - Hendrik
>>> No difference. A troll is a troll is a troll.
>>>
>>> :-)
>>>
>>> - Paddy.
>>
>> BTW people , the word for what fishermen do is  T R A W L  and not troll
>> (Ha! and I'm not a native English speaker).
> 
> Just read the whole thread, or use a dictionary: in fishing, trolling 
> and trawling are two different things; the first is done with a net, the 
> second with a line.
> 
> regards
>   Steve

Damn Wikipedia! It always gets things upside down, specially when I
'read the whole thread' :

"Trolling for fish" is a form of angling where lines with hook-rigged
lures are dragged behind a boat to entice fish to bite. Compare the term
"Trawling for fish," which involves dragging a net behind a boat to
catch large numbers of fish.

;c)

(Don't mind me. Just trolling...)






From richie at entrian.com  Thu Sep 13 09:48:46 2007
From: richie at entrian.com (Richie Hindle)
Date: Thu, 13 Sep 2007 14:48:46 +0100
Subject: Coming from Perl
In-Reply-To: <jWaGi.224$372.55@read2.cgocable.net>
References: <Cv%Fi.198$372.59@read2.cgocable.net>
	<1189644803.816375.269950@y42g2000hsy.googlegroups.com>
	<b46Gi.221$372.100@read2.cgocable.net>
	<87y7fa52ru.fsf@benfinney.id.au>
	<jWaGi.224$372.55@read2.cgocable.net>
Message-ID: <46fie3h8j1tbfq4cfuf94gagddvaei714p@4ax.com>


[Amer]
> Can you or anyone see anything in the posted code that might be the 
> cause?

> #!/usr/bin/python
> import cgitb; cgitb.enable(display=0, logdir=".")
> import sys
> sys.stderr = sys.stdout
> print "Content-Type: text/html"
> print

My guess would be that you don't have cgitb in your server environment, or
that you have a bogus one.  Rearrange things like this:

#!/usr/bin/python
print "Content-Type: text/html"
print
import sys
sys.stderr = sys.stdout
import cgitb; cgitb.enable(display=0, logdir=".")

-- 
Richie Hindle
richie at entrian.com


From trekker182 at gmail.com  Fri Sep 21 10:44:05 2007
From: trekker182 at gmail.com (Shawn Minisall)
Date: Fri, 21 Sep 2007 10:44:05 -0400
Subject: acronym program
Message-ID: <46F3D8B5.60908@gmail.com>

I'm trying to write a program that gets the first letter of every word 
of a phrase and prints it on screen.  I'm having problems with it.  I'm 
thinking a for loop would be good since I don't know the exact number of 
words the user is going to enter, but after that I get confused.  How do 
I tell python to just goto the beg of each word in the phrase and 
include it in the acronym?  Am I on the right track?

    for a in string.split(phrase)
    acronym = phrase [0]
    acronym = acronym + 1

thx


From jura.grozni at gmail.com  Wed Sep 19 07:24:46 2007
From: jura.grozni at gmail.com (azrael)
Date: Wed, 19 Sep 2007 11:24:46 -0000
Subject: Help for Otsu implementation from C
Message-ID: <1190201086.468348.274850@g4g2000hsf.googlegroups.com>

Can somone look at this

def otsu(hi):
    fmax=-1.0
    border=len(hi)
    for i in range(border):
        if hi[i]!=0:break
    for j in range(border-1,0-1,-1):
        if hi[j] != 0:break
    s = sum([k*hi[k] for k in range(border)])
    n = sum(hi) # product(im.size)
    n1=n2=csum=0.0
    for k in range(i,j):
        n1 += hi[k]
        n2  = n - n1
        csum+= k * hi[k]
        m1 = csum/ n1
        m2 = (s - csum)/n2
        sb = n1 * n2 * (m2 - m1)
        if sb > fmax:
            fmax = sb
            V=k+1
    print V

I try to implement it from C from this location.

http://www.google.com/codesearch?hl=de&q=+otsu+threshold+show:3rXPo8eEzw0:z-1MzowD-bQ:cDGSVzqKA7M&sa=N&cd=1&ct=rc&cs_p=http://www.studio-to-go.co.uk/source-packages/2.x/gocr-0.41.tar.bz2&cs_f=gocr-0.41/src/otsu.c#a0

It gives me till now the closest threshold value but still not the
exact

Testing Histogram given to the function as an atribute is:
hi = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 1, 0, 2, 0, 0, 2, 1, 2, 0, 1, 3, 3, 3, 3, 1, 3, 1, 3, 5,
2, 3, 3, 3, 6, 3, 4, 5, 4, 9, 6, 11, 6, 10, 3, 11, 9, 9, 12, 22, 18,
34, 22, 28, 32, 25, 34, 38, 34, 54, 65, 106, 160, 167, 203, 282, 364,
446, 637, 816, 1022, 1264, 1456, 1646, 1753, 1845, 1922, 2203, 2231,
1973, 2245, 2369, 2349, 2258, 2130, 2066, 1835, 1640, 1554, 1414,
1179, 1024, 974, 938, 838, 785, 756, 803, 921, 952, 865, 722, 625,
608, 547, 498, 412, 438, 408, 413, 415, 339, 366, 330, 320, 293, 315,
368, 411, 434, 500, 531, 538, 552, 665, 811, 869, 998, 1021, 1075,
1080, 1030, 934, 926, 1074, 942, 941, 1014, 1440, 2966, 5301, 2729,
3400, 5563, 13096, 9068, 6045, 2813, 686, 180]

it gives me 221 value but it should give me 218

Thanks in advance



From bj_666 at gmx.net  Fri Sep  7 09:46:14 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 7 Sep 2007 13:46:14 GMT
Subject: Class design (information hiding)
References: <fbr2gg$ipg$1@online.de>
	<46e1305e$0$18302$426a74cc@news.free.fr> <fbrj0h$74r$1@online.de>
Message-ID: <5kd316F31i6hU5@mid.uni-berlin.de>

On Fri, 07 Sep 2007 15:17:06 +0200, Alexander Eisenhuth wrote:

> Bruno Desthuilliers schrieb:
> 
>> Nope. It's either 'interface' (no leading underscore),  'implementation' 
>> (single leading underscore), 'implementation with some protection 
>> against accidental overriding' (two leading underscores).
> 
> What do you mean with 'implementation'? What does it express?

I guess he meant 'implementation detail', i.e. someone other then the
author of the class should not use until he really knows the
implementation and that this all might change without notice in the next
release.

Ciao,
	Marc 'BlackJack' Rintsch


From siona at chiark.greenend.org.uk  Wed Sep 19 09:22:22 2007
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 19 Sep 2007 14:22:22 +0100 (BST)
Subject: super() doesn't get superclass
References: <8764281uea.fsf@benfinney.id.au> <876427zhzq.fsf@benfinney.id.au>
	<13f196qktorgc88@corp.supernews.com>
	<873axbxl2f.fsf@benfinney.id.au>
Message-ID: <MKD*JIeVr@news.chiark.greenend.org.uk>

Ben Finney  <bignose+hates-spam at benfinney.id.au> wrote:
> If a function is named 'super' and operates on
>classes, it's a pretty strong implication that it's about
>superclasses.

But it doesn't (under normal circumstances) operate on classes.
It operates on an *instance*. And what you get back is a (proxy
to) a superclass/ancestor of the *instance*.

(And in the super(A, B) case, you get a superclass/ancestor of
*B*. As has just been said somewhere very near here, what is
misleading is the prominence of A, which isn't really the most
important class involved.)

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
   "Frankly I have no feelings towards penguins one way or the other"
        -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From robert.rawlins at thinkbluemedia.co.uk  Thu Sep 20 05:35:12 2007
From: robert.rawlins at thinkbluemedia.co.uk (Robert Rawlins - Think Blue)
Date: Thu, 20 Sep 2007 10:35:12 +0100
Subject: Killing A Process By PID
Message-ID: <00ec01c7fb69$8b2b5840$a18208c0$@rawlins@thinkbluemedia.co.uk>

Hello Guys,

 

I've got some code here which I'm using to kill a process if it freezes.
However I have no real way of testing it as I can't force a freeze on my
application. So thought I would run the code past you lot to see if anything
jumps out as not being quite right.

 

Now, my main application when it starts creates a lock file containing its
process ID using the following code:

 

file('/var/lock/Application.lock', 'w').write(str(os.getpid()))

 

Which to be honest appears to run just fine, when I look in that file it
always contains the correct process ID, for instance, 3419 or something like
that. This application also writes a date stamp to a log file every 10
seconds or so, and it's this date stamp that I use to determine if the
application has crashed.

 

def doCheck():

    try:

        f = open('/pblue/new/Logs/Alive.log','r')

 

        try:

            timestamp = f.read()

        finally:

            f.close()

    except Exception, e:

        logging.error(str(e))

    nowdatetime = timestuff.now()

 

    filedatetime = timestuff.strptime(timestamp, '%Y-%m-%d %H:%M:%S')

 

    if timestuff.RelativeDateTimeDiff(nowdatetime,filedatetime).minutes > 1:

        killApplication()

 

def killApplication():

      pid = file('/var/lock/Application.lock').read().strip()

      

      if file('/proc/%s/cmdline' % pid).read().endswith('python'):

            os.system('kill %s' % pid)

 

Now, this second script is run every minute on the system, the idea is to
check that time stamp file, and if it hasn't been updated in the past
minute, then kill the process, inittab can then pick it back up and it will
be as right as rain again. Now the problem is that I'm unable to test it
properly, and from what I've seen so far, when the app does freeze, the
process isn't being killed, which leads me to believe something isn't quite
right in my second script above.

 

Does anyone spot anything that sticks out? Or perhaps something I could be
doing a little better?

 

Thanks guys,

 

Rob

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From jgardner.jonathangardner.net at gmail.com  Thu Sep 13 16:00:22 2007
From: jgardner.jonathangardner.net at gmail.com (Jonathan Gardner)
Date: Thu, 13 Sep 2007 20:00:22 -0000
Subject: Python Database Apps
In-Reply-To: <1189658282.646375.160150@19g2000hsx.googlegroups.com>
References: <1189479130.905136.196820@r34g2000hsd.googlegroups.com>
	<mailman.387.1189521302.2658.python-list@python.org>
	<1189536987.259907.68650@e34g2000pro.googlegroups.com>
	<mailman.438.1189600804.2658.python-list@python.org>
	<1189608814.932322.301950@22g2000hsm.googlegroups.com>
	<mailman.460.1189641373.2658.python-list@python.org>
	<1189658282.646375.160150@19g2000hsx.googlegroups.com>
Message-ID: <1189713622.239555.164720@r29g2000hsg.googlegroups.com>

On Sep 12, 9:38 pm, Prateek <sure... at gmail.com> wrote:
> Have you checked out Brainwave?http://www.brainwavelive.com
>
> We provide a schema-free non-relational database bundled with an app
> server which is basically CherryPy with a few enhancements (rich JS
> widgets, Cheetah/Clearsilver templates). Free for non-commercial use.
>

You might want to rethink how you are handling databases. What sets
your database apart from hierarchical or object-oriented databases? Do
you understand why people prefer relational databases over the other
options? There's a reason why SQL has won out over all the other
options available. You would do well to understand it rather than
trying out things we already know do not work.



From kar1107 at gmail.com  Tue Sep 18 19:44:58 2007
From: kar1107 at gmail.com (Karthik Gurusamy)
Date: Tue, 18 Sep 2007 23:44:58 -0000
Subject: How can I know how much to read from a subprocess
In-Reply-To: <1190070896.332844.23080@22g2000hsm.googlegroups.com>
References: <1190070896.332844.23080@22g2000hsm.googlegroups.com>
Message-ID: <1190159098.980853.117290@v23g2000prn.googlegroups.com>

On Sep 17, 4:14 pm, spam.n... at gmail.com wrote:
> Hello,
>
> I want to write a terminal program in pygtk. It will run a subprocess,
> display everything it writes in its standard output and standard
> error, and let the user write text into its standard input.
>
> The question is, how can I know if the process wrote something to its
> output, and how much it wrote? I can't just call read(), since it will
> block my process.

The solution is not simple. You may try a separate thread to do the
reading (so that you can afford to block that single thread). You can
also run into other I/O deadlocks with a simple solution (ie if you
try to feed the whole stdin before reading any stdout, your stdin
feeding can block because the process's stdout is full --  it's a bit
confusing but for large stdin/stdout, a deadlock is very much
possible).

Did you try subprocess.Popen.communicate() ? Under the covers it
should take care of th ese deadlock issues. It may read and buffer the
whole stdout/stderr, so don't use it if the process generates infinite/
very-large stdout/stderr.

If the process you launch needs two way communication, like an ssh/ftp
session (where the stdin depends on process's prior stdout), the only
viable solution is to simulate a human (e.g. pexpect module)

Karthik
>
> Thanks,
> Noam




From mensanator at aol.com  Mon Sep 17 13:57:55 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: Mon, 17 Sep 2007 10:57:55 -0700
Subject: Try this
In-Reply-To: <mailman.646.1190027387.2658.python-list@python.org>
References: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>
	<13eqsdfsfvsa16f@corp.supernews.com>
	<1189969529.652871.19280@50g2000hsm.googlegroups.com>
	<mailman.621.1189970593.2658.python-list@python.org>
	<1189979679.969074.216490@y42g2000hsy.googlegroups.com>
	<1189981681.745195.18130@y42g2000hsy.googlegroups.com>
	<1189983233.709832.124290@19g2000hsx.googlegroups.com>
	<1189984913.956999.163100@n39g2000hsh.googlegroups.com>
	<1189990689.259451.232570@g4g2000hsf.googlegroups.com>
	<mailman.634.1189996018.2658.python-list@python.org>
	<1190008502.986300.286280@22g2000hsm.googlegroups.com>
	<mailman.646.1190027387.2658.python-list@python.org>
Message-ID: <1190051875.433350.150820@50g2000hsm.googlegroups.com>

On Sep 17, 6:09 am, Steve Holden <st... at holdenweb.com> wrote:
> mensana... at aol.com wrote:
> > On Sep 16, 9:27?pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> > wrote:
> >> En Sun, 16 Sep 2007 21:58:09 -0300, mensana... at aol.com  
> [...]
> >> What about the rest of the world that don't speak
> >> English or even worse, don't use the Latin alpabet?
>
> > When the rest of the world creates the next
> > generation of computers, THEY can chosse the
> > defaults.
>
> Right, because of course US companies have no desire to do business with
> the rest of the world.

I'm merely pointing out that it is the legacy of the history of
information technology that is chauvinistic. That happens to be
the way things are, I did not say that's the way they should be.

>
> I'm not given to ad hominem attacks, but this remark really seems to
> indicate that "chauvinistic cretin" might apply to you.

_I_ didn't invent ASCII or EBCDIC. Why weren't the European
and Chinese languages considered when these were developed
40-50 years ago? Because they were "chauvinistic cretins"?
Is that what you think?

> You'll be gald
> to know you are unlikely to hear from me again.

Why? Because I tend to act as a gadfly? To point out that
the emperor is, in fact, naked? Because the professional
programming community doesn't like their dirty laundry
aired in public?

>
> Your perception of the development of information technology is so
> skewed you would be better off knowing nothing.

My perception is skewed? Why then, does Unicode even exist?

>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
>
> Sorry, the dog ate my .sigline




From m.n.summerfield at googlemail.com  Thu Sep 27 04:26:16 2007
From: m.n.summerfield at googlemail.com (Mark Summerfield)
Date: Thu, 27 Sep 2007 08:26:16 -0000
Subject: sorteddict [was a PEP proposal, but isn't anymore!]
In-Reply-To: <1190829592.800804.242260@50g2000hsm.googlegroups.com>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190829592.800804.242260@50g2000hsm.googlegroups.com>
Message-ID: <1190881576.186259.313720@57g2000hsv.googlegroups.com>

On 26 Sep, 18:59, Raymond Hettinger <pyt... at rcn.com> wrote:
> [Mark Summerfield]
>
> > Below is a PEP proposal for a sorteddict. It arises out of a
> > discussion on this list that began a few weeks ago with the subject of
> > "An ordered dictionary for the Python library?"
>
> It is worth remembering that the long sought after datatype was a dict
> that could loop over keys in *insertion* order, not based on some
> function of the key itself.
>
> > If there is positive feedback I will submit the PEP to the reviewers,
> > so if you think it is a good idea please say so.
>
> As one who was submitted many PEPs, I can advise that the quickest way
> to irrevocably kill an idea is to submit a PEP to early (we almost
> didn't get genexps because the PEP was submitted pre-maturely).
> Instead, I advise posting an ASPN recipe so the details can be
> hammered-out and a fan club can be grown.
>
> For this particular idea, I am -1 on inclusion in the standard
> library.  The PEP focuses mainly on implementation but is weakest in
> the rationale section.  Its advantages over "for k in sorted(d)" are
> miniscule.  To be considered for the collections module, there needs
> to be compelling use case advantages either in terms of usability or
> performance.
[snip]

I gave up on the idea of submitting it as a PEP many postings ago:-)
I've now changed the subject line to reflect that.

I will leave the pure python sorteddict on PyPI for anyone who wants
it.

I won't put it on the cookbook site for the time being, simply because
it is eating up much  more time than I thought!




From andre.roberge at gmail.com  Fri Sep  7 11:54:38 2007
From: andre.roberge at gmail.com (=?iso-8859-1?B?QW5kcuk=?=)
Date: Fri, 07 Sep 2007 15:54:38 -0000
Subject: Is a Borg rebellion possible? (a metaclass question)
In-Reply-To: <mailman.220.1189171663.2658.python-list@python.org>
References: <1189168282.665210.260840@19g2000hsx.googlegroups.com>
	<mailman.220.1189171663.2658.python-list@python.org>
Message-ID: <1189180478.257790.60160@g4g2000hsf.googlegroups.com>

On Sep 7, 10:27 am, Carsten Haese <cars... at uniqsys.com> wrote:
> On Fri, 2007-09-07 at 12:31 +0000, Andr? wrote:
> > In my application, I make use of the Borg idiom, invented by Alex
> > Martelli.
>
> > class Borg(object):
> >     '''Borg Idiom, from the Python Cookbook, 2nd Edition, p:273
>
> >     Derive a class form this; all instances of that class will share
> > the
> >     same state, provided that they don't override __new__; otherwise,
> >     remember to use Borg.__new__ within the overriden class.
> >     '''
> >     _shared_state = {}
> >     def __new__(cls, *a, **k):
> >         obj = object.__new__(cls, *a, **k)
> >         obj.__dict__ = cls._shared_state
> >         return obj
>
> > ----
> > This has worked very well so far, but is starting to impose some
> > unwanted constraints on my program design.
>
> > What I would like to do is, to put it figuratively, create a Borg
> > rebellion with various splinter groups.  In concrete Python terms, I
> > would like to have
>
> > class MyClass(Borg, ...):
> >    ...
>
> > seven_of_nine = MyClass(...)  # part of group "BORG"
> > two_of_nine = MyClass(...)
>
> > splinter1 = MyClass(..., group='splinter')
> > splinter2 = MyClass(..., group='splinter')
>
> > and have splinter 1 and splinter2 share the same state, but a
> > different state than the one shared by members of the BORG collective.
>
> > Any suggestions from the metaclass experts?
>
> You don't need a metaclass. Just turn _shared_state into a dictionary of
> shared states, keyed by the group name:
>
> class SplinterBorg(object):
>     _shared_states = {}
>     def __new__(cls, *a, **k):
>         group = k.pop("group","BORG")
>         obj = object.__new__(cls, *a, **k)
>         obj.__dict__ = cls._shared_states.setdefault(group,{})
>         return obj
>
> HTH,
>
> --
> Carsten Haesehttp://informixdb.sourceforge.net

Unfortunately, it fails.  Here's what I tried, followed by the
traceback
class SplinterBorg(object):
    _shared_states = {}
    def __new__(cls, *a, **k):
        group = k.pop("group","BORG")
        obj = object.__new__(cls, *a, **k)
        obj.__dict__ = cls._shared_states.setdefault(group,{})
        return obj

class MyClass(SplinterBorg):
   def __init__(self, name):
       self.name = name

a1 = MyClass('a')
a2 = MyClass('aa')
b1 = MyClass('b', group="B")


Traceback (most recent call last):
  File "test.py", line 15, in <module>
    b1 = MyClass('b', group="B")
TypeError: __init__() got an unexpected keyword argument 'group'




From sergio.correia at gmail.com  Mon Sep  3 01:43:58 2007
From: sergio.correia at gmail.com (Sergio Correia)
Date: Mon, 3 Sep 2007 00:43:58 -0500
Subject: PYTHONPATH not working on Windows XP (?)
Message-ID: <f1aa6d810709022243idabe3bao3912b36a02eadfdf@mail.gmail.com>

Hi,

I'm trying to add a personal folder to the path used by python in
searching for packages and modules. This folder, "C:\docs\utils" , has
some packages not yet ready for "site-packages".

First, I tried sys.path.append("C:\docs\utils") BUT this only lasts
for the current python session.

Then, I read about PYTHONPATH and went to Control Panel - System -
Advanced - Enviromental Variables, and created a new variable
(PYTHONPATH) containing the folder. However, sys.path does not detects
it.. keeps printing the same old files:

>>> import sys; import pprint; pprint.pprint(sys.path)

['C:\\Program Files\\AutoHotkey',
 'C:\\Program Files\\Python25\\Lib\\idlelib',
 'C:\\WINDOWS\\system32\\python25.zip',
 'C:\\Program Files\\Python25\\DLLs',
 'C:\\Program Files\\Python25\\lib',
 'C:\\Program Files\\Python25\\lib\\plat-win',
 'C:\\Program Files\\Python25\\lib\\lib-tk',
 'C:\\Program Files\\Python25',
 'C:\\Program Files\\Python25\\lib\\site-packages']

(By the way, how did that AutoHotkey folder got there? Can I remove it
from sys.path?)

After my second failure, I went to the registry
HKEY_LOCAL_MACHINE\SOFTWARE\Python\PythonCore\2.5\PythonPath

and added my folder there. Still nothing on sys.path , and my imports fail.

Any suggestions for adding my path to sys.path permanently? I'm
running out of ideas

Thanks,
Sergio


From steve at holdenweb.com  Tue Sep 11 18:15:20 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 11 Sep 2007 18:15:20 -0400
Subject: Python.org mirror
In-Reply-To: <F79CF4D66F464242A8774755186E9EFE@laptopmark>
References: <F79CF4D66F464242A8774755186E9EFE@laptopmark>
Message-ID: <46E71378.40505@holdenweb.com>

Stream Service || Mark Scholten wrote:
> Dear sir, madam,
>  
> Stream Service would be happy to provide a free mirror for python.org. 
> We also host nl.php.net for free and we are happy to support more 
> opensource websites with free hosting.
>  
> Could you inform me about the options to become an officiel python.org 
> mirror?
>  
You may or may not be aware that the main Python site is hosted in the 
Netherlands.

Many thanks for your offer, but we have in any case discontinued the 
addition of new mirrors. See item 14 in

   http://www.python.org/psf/records/board/minutes/2007-03-12/

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------


From horpner at yahoo.com  Fri Sep 14 10:20:41 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Fri, 14 Sep 2007 14:20:41 GMT
Subject: recursion
References: <fcbfnj$lh4$1@ss408.t-com.hr>
	<slrnfeinvk.1cc.horpner@FIAD06.norwich.edu>
	<mailman.491.1189700115.2658.python-list@python.org>
	<slrnfeit3k.1lg.horpner@FIAD06.norwich.edu>
	<fcdrv9$7lr$1@ss408.t-com.hr> <5kvbn3F5h7l3U1@mid.uni-berlin.de>
	<1189774387.132173.282890@r29g2000hsg.googlegroups.com>
Message-ID: <slrnfel6cp.1is.horpner@FIAD06.norwich.edu>

On 2007-09-14, John Machin <sjmachin at lexicon.net> wrote:
> On Sep 14, 10:04 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>> On Fri, 14 Sep 2007 13:40:17 +0200, Gigs_ wrote:
>> > sorry i think that i express wrong. having problem with english
>>
>> > what i mean is how python knows to add all thing at the end of recursion
>>
>> Because you have written code that tells Python to do so.  ;-)
>>
>> >  >>> def f(l):
>> >      if l == []:
>> >          return []
>> >      else:
>> >          return f(l[1:]) + l[:1]
>>
>> > f([1,2,3])
>>
>> > recursion1   f([2,3]) + [1]
>>
>> > recursion2   f([3]) + [2]  or [2, 1]?
>>
>> > recursion3   f([]) + [3] or   [3, 2, 1]
>>
>> Both alternatives in recursion 2 and 3 are wrong.  You have to
>> simply replace the function invocation by its result which
>> gives:
>>
>>     f([1, 2, 3])
>> r1  f([2, 3]) + [1]
>> r2  f([3]) + [2] + [1]
>> r3  f([]) + [3] + [2] + [1]
>> r4  [] + [3] + [2] + [1]
>>
>> And now the calls return:
>>
>> r3  [3] + [2] + [1]
>> r2  [3, 2] + [1]
>> r1  [3, 2, 1]
>>
>> > i dont get all this
>>
>> >  >>> def f(l):
>> >      if l == []:
>> >    print l
>> >          return []
>> >      else:
>> >          return f(l[1:]) + l[:1]
>>
>> >  >>> f([1,2,3])
>> > []
>> > [3, 2, 1]  # how this come here? how python save variables from each
>> > recursion?
>>
>> There is not just one `l` but one distinct `l` in each call.
>>
>
> I reckon that what the OP wants is a simple explanation of how
> function calls use a stack mechanism for arguments and local
> variables, and how this allows recursive calls, unlike the good ol'
> FORTRAN IV of blessed memory. Perhaps someone could oblige him?
>
> I'd try but it's time for my beauty sleep :-)
><yawn>
> Good night all

I may as well stick my neck out again, since I'm already
beautiful. ;)

Another way of understanding recursion is to break it up into
seperate functions, so the spectre of a function calling itself
doesn't appear.

def f(l):
  if l == []:
    return []
  else:
    return f(l[1:]) + l[:1]

The function above reverses a list of arbitrary length. To help
understand how it works, I'll write several discreet functions
that sort lists of fixed lengths.

I start with a simple case (though not the simplest case--that
only comes with experience), reversing a two-element list:

def f2(l): # reverse a two-element list
  return [l[1], l[0]]

Next build up to the next level, writing a function that can
reverse a three-element list. The key is to be as lazy as
possible. You must figure out a way of taking advantage of the
function that reverses a two-element list. The obvious solution
is to use f2 to reverse the last two elements in our list, and
append the first element in the list to that result:

def f3(l): # reverse a three-element list
  return f2(l[1:]) + l[:1]

And so on:

def f4(l):
  return f3(l[1:]) + l[:1]

def f5(l):
  return f4(l[1:]) + l[:1]

def f6(l):
  return f5(l[1:]) + l[:1]

A definite pattern had emerged, and it should be apparent now how
to combine all those functions into one:

def f_(l):
  if len(l) == 2:
    return [l[1], l[0]]
  else:
    return f_(l[1:]) + l[:1]

But the function above breaks for lists with less than two items.

>>> f_([1])
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 2, in f2
IndexError: list index out of range

We can handle that. The reverse of a zero or one-element list is
just itself.

def f_(l):
  if len(l) < 2:
    return l
  elif len(l) == 2:
    return [l[1], l[0]]
  else:
    return f_(l[1:]) + l[:1]

And we've arrived at an OK recursive function that can handle
arbitrary length lists. It's not as simple as it could be,
however. A little intuitive leap, perhaps, will allow you to note
that the case of a two-element list can actually be handled
without a special case:

def f(l):
  if len(l) < 2:
    return l
  else:
    return f(l[1:]) + l[:1]

Final note: for reasons of tradition, base cases are almost
always set up as it was in the original function, checking for a
zero-length list, and returning a new empty list, the truly
simplest base case. Another intuitive leap is possibly required
to note that a one-element list is not a special case after all:
it's a reverse of a zero-element list with that one element
appended.

def f(l):
  if len(l) == 0:
    return []
  else:
    return f(l[1:]) + l[:1]

Clear as mud?

-- 
Neil Cerutti


From ldo at geek-central.gen.new_zealand  Sun Sep 23 22:54:54 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 24 Sep 2007 14:54:54 +1200
Subject: [Bulk] Re: Writing Object Data to Disk
References: <1190443648.5838.6.camel@ubuntu-laptop>
	<18c1e6480709230934k61504fa1r528c2f4ade9722f0@mail.gmail.com>
	<mailman.943.1190567992.2658.python-list@python.org>
Message-ID: <fd78tu$d8c$2@lust.ihug.co.nz>

In message <mailman.943.1190567992.2658.python-list at python.org>, Amit Kumar
Saha wrote:

> I appreciate the XML related comment, but as of now I am ready-to-roll
> with Python specific pickling. XML will be used in a later version of my
> code!

Will you need to maintain backward compatibility with data written by the
current version of your code?


From steve at holdenweb.com  Sat Sep 15 18:40:22 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 15 Sep 2007 18:40:22 -0400
Subject: problems using pythom tempfile module
In-Reply-To: <1189894434.135052.283420@w3g2000hsg.googlegroups.com>
References: <1189890699.807384.258580@o80g2000hse.googlegroups.com>	<1189891458.583774.171030@22g2000hsm.googlegroups.com>
	<1189894434.135052.283420@w3g2000hsg.googlegroups.com>
Message-ID: <fchn0m$4d8$1@sea.gmane.org>

samir.vds at googlemail.com wrote:
> On Sep 15, 5:24 pm, buffi <bjorn.kem... at gmail.com> wrote:
>> On Sep 15, 11:11 pm, "samir.... at googlemail.com"
>>
>>
>>
>> <samir.... at googlemail.com> wrote:
>>> Hello everyone,
>>> I'm trying to test the tempfile module with the following script,
>>> which basically creates a temporary file, fills the file with some
>>> test data and prints it.
>>> import tempfile
>>> t = tempfile.TemporaryFile()
>>> t.write("lalalala")
>>> t.flush()
>>> print t.read()
>>> Unfortunately, the print statement gives me an empty string. Can
>>> somebody tell me what I'm doing wrong ?
>>> regards Samir
>> Do a t.seek(0) before you do the read to "rewind" the file and then it
>> should work.
> 
> Ok, this really worked. Can you elaborate why I have to insert this
> statement?
> 
Each file has a "current position". As you write a file the current 
position moves to stay just ahead of what's been written. So if you read 
it without resetting the current position (back to the beginning with 
seek(0)) you will get an immediate end of file (i.e. 0 bytes) returned.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From korovev76 at gmail.com  Wed Sep 19 10:22:49 2007
From: korovev76 at gmail.com (korovev76 at gmail.com)
Date: Wed, 19 Sep 2007 07:22:49 -0700
Subject: ONYX
Message-ID: <1190211769.268351.79500@d55g2000hsg.googlegroups.com>

Hi everybody! Is there anything out there that can validate and parse
some "onyx-style" xml? I searched the web, but coulnd't find nothing
really interesting about it...


thank you!

korovev



From chris.monsanto at gmail.com  Fri Sep 21 22:12:26 2007
From: chris.monsanto at gmail.com (chris.monsanto at gmail.com)
Date: Sat, 22 Sep 2007 02:12:26 -0000
Subject: Counting method calls
In-Reply-To: <mailman.902.1190416492.2658.python-list@python.org>
References: <mailman.902.1190416492.2658.python-list@python.org>
Message-ID: <1190427146.685440.111640@50g2000hsm.googlegroups.com>

On Sep 21, 7:15 pm, Ricardo Ar?oz <ricar... at gmail.com> wrote:
> Hi, I know I'm being dumb but, why does it not work?
>
> >>> class MyList(list):
>
> ...     def __init__(self):
> ...         self.calls = 0
> ...     def __getattr__(self, name):
> ...         self.calls += 1
> ...         return list.__getattribute__(self, name)
>
> >>> a = MyList()
> >>> a
> []
> >>> a.append(1)
> >>> a
> [1]
> >>> a.calls
> 88
> >>> a.append(3)
> >>> a.calls
> 88
> >>> a.sort()
> >>> a
> [1, 3]
> >>> a.calls
>
> 176
>
> TIA

__getattr__ only works for attributes that don't exist. The name is
sorta confusing...



From koutoo at hotmail.com  Tue Sep 18 16:59:47 2007
From: koutoo at hotmail.com (koutoo at hotmail.com)
Date: Tue, 18 Sep 2007 13:59:47 -0700
Subject: How do you limit the # of lines Read?
Message-ID: <1190149187.799482.151320@19g2000hsx.googlegroups.com>

I am working on a loop for my code and was wondering if there is a way
to limit the number of lines read through?  I'd hate to cut the test
file in order to run the code in the testing phase.  Can you add a
value in the parenthesis of the readline() function?

t = string.readline()  # Limit this somehow?


Kou



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Sep 21 03:36:16 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 21 Sep 2007 09:36:16 +0200
Subject: Zope review
In-Reply-To: <1190331847.514475.284200@22g2000hsm.googlegroups.com>
References: <1190331847.514475.284200@22g2000hsm.googlegroups.com>
Message-ID: <46f37471$0$16854$426a74cc@news.free.fr>

Norm a ?crit :
> Hi,
> 
> without meaning to start a flame war between the various python web
> tools, I was wondering if anyone had a review of the status of Zope.
> For example, is it being used for new projects or just maintenance?
> 
> I really like the look of Zope 3, and the interface/schema pattern for
> defining objects looks very useful - but if the general feeling is to
> use a different tool since Zope 3 isn't being used in the community
> then I would prefer to start with that as I get to grips with Python
> again.

Zope is kinda of a world by itself, and it's often considered as not 
very pythonic. FWIW, it has it's own community.

As far as I'm concerned, having working experience with Zope2, I'd say 
that Zope3 is certainly an interesting evolution, but absolutely not the 
kind of framework I'm after. My bet is that Pylons is the next big thing.



From __peter__ at web.de  Wed Sep 19 10:03:50 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 19 Sep 2007 16:03:50 +0200
Subject: Keeping a database connection with a Singleton?
References: <1190208406.041953.115580@g4g2000hsf.googlegroups.com>
	<fcr969$c8g$02$1@news.t-online.com>
	<1190209817.842068.280270@w3g2000hsg.googlegroups.com>
Message-ID: <fcra86$c8g$02$2@news.t-online.com>

exhuma.twn wrote:

> On Sep 19, 3:45 pm, Peter Otten <__pete... at web.de> wrote:
>> exhuma.twn wrote:
> [...]
>>
>> By the way, there is a pythonic (near) singleton: the module. So if you go
>> with option 2, just move the connection setup into a separate module that
>> you can import into client code.
>>
>> Peter
> 
> You say "(near)" singleton. What's the difference then?

I was thinking of the main script of an application. If you import
that by its name

import main # assuming the file is main.py

you end up with two instances sys.modules["main"] and sys.modules["__main__"].

Peter


From xah at xahlee.org  Mon Sep 10 18:14:51 2007
From: xah at xahlee.org (Xah Lee)
Date: Mon, 10 Sep 2007 15:14:51 -0700
Subject: printing list containing unicode string
In-Reply-To: <mailman.326.1189437162.2658.python-list@python.org>
References: <1189432793.383166.156710@d55g2000hsg.googlegroups.com>
	<mailman.326.1189437162.2658.python-list@python.org>
Message-ID: <1189462491.541100.107150@22g2000hsm.googlegroups.com>

On Sep 10, 8:12 am, Carsten Haese <cars... at uniqsys.com> wrote:
Xah Lee wrote:
 
If i have a nested list, where the atoms are unicode strings, e.g.

# -*- coding: utf-8 -*-
ttt=[[u"?",u"?"], [u"???"],...]
print ttt

how can i print it without getting the u'\u1234' notation?
i.e. i want it print just like this: [[u"?"], ...]
 

Carsten Haese wrote:
 
It's not quite clear why you want to do this, but this is how you
could
do it:

print repr(ttt).decode("unicode_escape").encode("utf-8")
 

Super! Thanks a lot.

About why i want to... i think it's just simpler and easier on the
eye?

here's a example output from my program:
[[u' ', 1022], [u'?', 472], [u' ', 128], [u'?w', 300], [u'?s', 12],
[u'?|', 184],...]

wouldn't it be preferable if Python print like this by default...

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



From luojiang2 at tom.com  Mon Sep 10 22:45:20 2007
From: luojiang2 at tom.com (Ginger)
Date: Tue, 11 Sep 2007 10:45:20 +0800
Subject: anybody has py modules emulating symbian 60 on PC?
References: <mailman.1141.1189478046.2656.python-list@python.org>
Message-ID: <005f01c7f41d$cb9cfa80$4de1a8c0@amd.com>

like appuifw/graphics/sysinfo modules,
i've get some primary modules of these, they do what they did on S60 platform. u can get them from http://pdis.hiit.fi/pdis/
but these modules i get are rather simple ones, and a full emulation is needed ..., so anyone who has it, plz send me a copy, with my appreciation.

    thanks and regards
Ginger


From xdicry at gmail.com  Wed Sep 12 04:17:21 2007
From: xdicry at gmail.com (Evan)
Date: Wed, 12 Sep 2007 01:17:21 -0700
Subject: How can I work on VIM for python code such as cscope for C code?
Message-ID: <1189585041.556933.77350@22g2000hsm.googlegroups.com>

Hi, guys ~~

How can i work on VIM for python code?  I use cscope plugin on VIM for
C code before, it helps me to  different function and search C
variable where it is defined.

I'm now starting to learn python, and I'd like to know how works on
VIM.

I saw that the VIM is support python such as syntax highlighting,
autocmd,etc. but I really want to know if it can work with TAG.

Do I need to downlaod other software/plugin?

Thanks,



From dotancohen at gmail.com  Sun Sep 16 12:07:30 2007
From: dotancohen at gmail.com (Dotan Cohen)
Date: Sun, 16 Sep 2007 18:07:30 +0200
Subject: Cannot formulate regex
In-Reply-To: <5dcHi.108404$Y95.5768344@phobos.telenet-ops.be>
References: <mailman.610.1189955906.2658.python-list@python.org>
	<5dcHi.108404$Y95.5768344@phobos.telenet-ops.be>
Message-ID: <880dece00709160907l5d512305k9cb074f99da38175@mail.gmail.com>

On 16/09/2007, Roel Schroeven <rschroev_nospam_ml at fastmail.fm> wrote:
> FYI Kodos (http://kodos.sourceforge.net/) can be very useful for
> developing, testing and debugging such regexes.

Thanks, it's even in the Ubuntu repos.

> If I have been able to see further, it was only because I stood
> on the shoulders of giants.  -- Isaac Newton

Liebnitz should have quoted Newton on that one, too!

Dotan


From walter at livinglogic.de  Wed Sep 12 08:13:48 2007
From: walter at livinglogic.de (=?UTF-8?B?V2FsdGVyIETDtnJ3YWxk?=)
Date: Wed, 12 Sep 2007 14:13:48 +0200
Subject: Generating HTML
In-Reply-To: <9e2f512b0709112133l41ce5ef1g815962a81becf6b9@mail.gmail.com>
References: <9e2f512b0709112133l41ce5ef1g815962a81becf6b9@mail.gmail.com>
Message-ID: <46E7D7FC.8070002@livinglogic.de>

Sebastian Bassi wrote:

> Hello,
> 
> What are people using these days to generate HTML? I still use
> HTMLgen, but I want to know if there are new options. I don't
> want/need a web-framework a la Zope, just want to produce valid HTML
> from Python.

If you want something that works similar to HTMLgen, you could use XIST:
http://www.livinglogic.de/Python/xist/

Servus,
   Walter


From steve at holdenweb.com  Mon Sep 17 07:09:26 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 17 Sep 2007 07:09:26 -0400
Subject: Try this
In-Reply-To: <1190008502.986300.286280@22g2000hsm.googlegroups.com>
References: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>	<13eqsdfsfvsa16f@corp.supernews.com>	<1189969529.652871.19280@50g2000hsm.googlegroups.com>	<mailman.621.1189970593.2658.python-list@python.org>	<1189979679.969074.216490@y42g2000hsy.googlegroups.com>	<1189981681.745195.18130@y42g2000hsy.googlegroups.com>	<1189983233.709832.124290@19g2000hsx.googlegroups.com>	<1189984913.956999.163100@n39g2000hsh.googlegroups.com>	<1189990689.259451.232570@g4g2000hsf.googlegroups.com>	<mailman.634.1189996018.2658.python-list@python.org>
	<1190008502.986300.286280@22g2000hsm.googlegroups.com>
Message-ID: <fcln98$ef4$1@sea.gmane.org>

mensanator at aol.com wrote:
> On Sep 16, 9:27?pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>> En Sun, 16 Sep 2007 21:58:09 -0300, mensana... at aol.com  
[...]
>> What about the rest of the world that don't speak
>> English or even worse, don't use the Latin alpabet?
> 
> When the rest of the world creates the next
> generation of computers, THEY can chosse the
> defaults.
> 
Right, because of course US companies have no desire to do business with 
the rest of the world.

I'm not given to ad hominem attacks, but this remark really seems to 
indicate that "chauvinistic cretin" might apply to you. You'll be gald 
to know you are unlikely to hear from me again.

Your perception of the development of information technology is so 
skewed you would be better off knowing nothing.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From rafael81 at dif.um.es  Thu Sep 20 04:28:49 2007
From: rafael81 at dif.um.es (Rafael Marin Perez)
Date: Thu, 20 Sep 2007 10:28:49 +0200
Subject: Python for NSLU2
Message-ID: <1190276929.11755.41.camel@rapema-desktop>

Hello,

I am Rafael Marin Perez, and work as a researcher in University of
Murcia (Spain).
We are using the Network Storage Link for USB2.0 (NSLU2) device to
desploy a wireless sensor network (WSN). 

And I need to install a bootstrap-loader of MSP430 in my NSLU2 to transfer
the compiled images to the nodes. This bootstrap work over python.
Therefore, I'm trying to install and compile modules of python2.4 for
the ARM architecture of NSLU2 device.
But I don't get to compile correctly.

I'm using the cross compiler:
http://peter.korsgaard.com/articles/crosstool-armv5b-softfloat-gcc-3.3.4-glibc-2.2.5.tar.gz

Any idea, How can I do this?

Thanks for your help.
Regards, Rafa.






From deets at nospam.web.de  Tue Sep 25 18:15:42 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 26 Sep 2007 00:15:42 +0200
Subject: jack audio connection kit
In-Reply-To: <mailman.1062.1190752347.2658.python-list@python.org>
References: <mailman.1062.1190752347.2658.python-list@python.org>
Message-ID: <5ltfleF9tgibU1@mid.uni-berlin.de>

patrick schrieb:
> hello everyone,
> 
> is there a way to make python output audio in jack:
> http://jackaudio.org/
> 
> jack is the best audio solution for linux, mac and lately windows. i 
> found 1 project called pyjack, but the author remove the software from 
> his website.
> 
> that would be neat!

It seems to be a C-API-based app - simply use ctypes to access it. 
Shouldn't be hard.

Diez


From writser at gmail.com  Wed Sep 19 12:17:06 2007
From: writser at gmail.com (writser at gmail.com)
Date: Wed, 19 Sep 2007 09:17:06 -0700
Subject: Simple threading example freezes IDLE?
Message-ID: <1190218626.334442.255450@57g2000hsv.googlegroups.com>

hey all,

For my study I'm writing a simple threaded webcrawler and I am trying
to do this in python. But somehow, using threads causes IDLE to crash
on Windows XP (with the latest python distribution 2.5.1). Even a
simple example such as this:

import thread, time

def doSomething():
  print "something"

for i in range(2):
  thread.start_new(doSomething, ())

causes IDLE to freeze when I type it in the interpreter. Using the
python command line everything works just fine. Using IDLE on Debian
linux also does not cause anything to crash. What am I overlooking?

regards, Writser Cleveringa



From brown at esteem.com  Thu Sep  6 19:24:09 2007
From: brown at esteem.com (Tom Brown)
Date: Thu, 6 Sep 2007 16:24:09 -0700
Subject: why should I learn python
In-Reply-To: <1189119676.239459.325280@w3g2000hsg.googlegroups.com>
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
	<87zlzzs9by.fsf@wilson.homeunix.com>
	<1189119676.239459.325280@w3g2000hsg.googlegroups.com>
Message-ID: <200709061624.10112.brown@esteem.com>

On Thursday 06 September 2007 16:01, windandwaves wrote:
> Hmmm, thank you all for your replies.  I will do some research on the
> net (i did some already, but because I am really not much of a
> programmer, it is often too detailed for me).  I have limited time,
> but it does sound like something to learn, just for fun and for
> practical use.  How would you use it in a web development
> environment?  I mean, in real practical terms.  Could it assist with
> php? Is it easy to write GUI programs in Python?

Checkout http://www.djangoproject.com/ or http://turbogears.org/ for web 
development. Checkout http://www.riverbankcomputing.co.uk/pyqt/index.php for 
writing GUI programs. There are other options for GUI apps. That is the one I 
use all the time.

Good luck,
Tom


From fakeaddress at nowhere.org  Wed Sep 19 00:08:23 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Wed, 19 Sep 2007 04:08:23 GMT
Subject: can Python be useful as functional?
In-Reply-To: <mailman.700.1190096495.2658.python-list@python.org>
References: <1190073045.618869.261290@k79g2000hse.googlegroups.com>	<mailman.696.1190092326.2658.python-list@python.org>	<1i4lvih.8g4kwjijx8e2N%aleax@mac.com>
	<mailman.700.1190096495.2658.python-list@python.org>
Message-ID: <Xg1Ii.34734$RX.31745@newssvr11.news.prodigy.net>

Rustom Mody asked:
> [...] why does
> 
> (yield(x) for x in si(l) if x % p != 0)
> 
> not work? I would have expected generator expression to play better
> with generators.

You have a statement, "yield(x)", where the construct requires
an expression.


-- 
--Bryan


From kf9150 at gmail.com  Fri Sep 28 17:59:33 2007
From: kf9150 at gmail.com (kf9150 at gmail.com)
Date: Fri, 28 Sep 2007 14:59:33 -0700
Subject: your opinion on book "Foundations of Python Network Programming"?
Message-ID: <1191016773.834049.8940@19g2000hsx.googlegroups.com>

Hello,

i'm debating if i should buy this book. it received good reviews at
Amazon: http://tinyurl.com/24zvrf. but it was published in 2004 and
i'm afraid quite some materials might be outdated? any input?

thanks,

kelie



From charles.fox at gmail.com  Thu Sep 13 12:05:10 2007
From: charles.fox at gmail.com (Charles Fox)
Date: Thu, 13 Sep 2007 09:05:10 -0700
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <13eim00ha4lf356@corp.supernews.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189604018.520338.162520@57g2000hsv.googlegroups.com>
	<mailman.486.1189693844.2658.python-list@python.org>
	<13eim00ha4lf356@corp.supernews.com>
Message-ID: <1189699510.244755.85080@r34g2000hsd.googlegroups.com>

hmm, I guess this is the difference between numerical programming and
the rest -- sure, if I was writing a database server or something it
would be great to have thisObject.veryLongName to know what everything
is -- however when you are implementing a model from a published
paper, the variables tend to be single greek or roman letter names,
possibly with subscripts and superscripts, and it helps if the name
you see on the screen is the same as the name on the paper, as is the
case in matlab.  You want the equation on screen to look as similar to
the one on the paper as possible, especially if its going to be read
by another programmer who is familiar with the paper.

Maybe for now I will just fix up my emacs to display the world 'self'
in 10% gray...   :-)




From hanke at brailcom.org  Thu Sep 20 09:26:56 2007
From: hanke at brailcom.org (Hynek Hanke)
Date: Thu, 20 Sep 2007 09:26:56 -0400
Subject: pdb attach?
Message-ID: <46F27520.40603@brailcom.org>

Hello,

please, is there something like 'attach' in pdb yet? My application uses 
threads
and when it freezes (e.g. due to a deadlock situation), I'd like to get 
the traceback
of all threads and inspect at which point did the application get into 
problems.
Or could I send a signal to such a python process so that it would 
output backtraces
from all threads before terminating?

Because currently, if a thread runs into deadlock problems (or a thread 
fails on
an exception and the other thread can't join it), I have no way of 
determining
what went wrong.

Such processes are not possible to terminate via CTRL-C in the 
interpreter, so
I can't get the backtrace this way. Furthermore, I also need to debug 
subprocesses,
so these are difficult to invoke interactively.

I'm happy for any suggestions.

Thank you,
Hynek Hanke


From rrr at ronadam.com  Fri Sep 21 20:33:16 2007
From: rrr at ronadam.com (Ron Adam)
Date: Fri, 21 Sep 2007 19:33:16 -0500
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <1190415741.380795.259050@y42g2000hsy.googlegroups.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>	<mailman.900.1190414696.2658.python-list@python.org>
	<1190415741.380795.259050@y42g2000hsy.googlegroups.com>
Message-ID: <fd1nsc$r10$1@sea.gmane.org>



Cristian wrote:
> On Sep 21, 3:44 pm, Ron Adam <r... at ronadam.com> wrote:
> 
>> I think key may be to discuss names and name binding with your friend.  How
>> a name is not the object it self, like a variable is in other languages.
>> For example show him how an object can have more than one name.  And discus
>> how names can be bound to nearly anything, including classes and functions.
> 
> I could discuss name binding but it would be great if Python said this
> itself. After all, you can even bind a module with the foo = bar
> syntax by using __import__ function. If function definitions followed
> the same pattern, I think a beginner would subconsciously (maybe even
> consciously) realize that function names are just like everything
> else. Actually, this would be helpful for many people. If you come
> from a language like Java you're used to thinking of attributes and
> methods as living in different namespaces. I think a new syntax will
> encourage seasoned programmers think in a more Pythonic way.

I could see methods having their own keywords.  Then functions defined in 
classes would be static methods without any extra work.   But to do that 
would break a lot of already existing code as well as confuse a lot of 
current users.


> Python has done a very good job in easing people into programming. My
> friend doesn't come to me very often because the syntax is clear and
> simple and the builtin datatypes allow you to do so much. My goal is
> that I would never have to explain to him about name binding; that
> he'd pick it up by learning the language on his own. He's learned
> lists, dictionaries and even some OOP without me. I don't think name
> binding would be a stretch.

Chances are he'll run into a gotcha where an object has two names and sort 
it out that way.  Which is why I suggested starting there.  It will save 
him some grief if he hasn't run into it yet.


>> You could also discus factory functions with him.  Once he gets that a
>> function can return another function, then it won't be so much of a leap
>> for a function to take a function as an argument.
> 
> I think this isn't the most intuitive way of approaching first order
> functions. 

The Python tutorial does this by defining a function, then assigning it to 
another name and calling it from the new name.

      http://www.python.org/doc/current/tut/tut.html


> It's true that if a function can return another function
> then a function must be first order (i.e., it's just like any other
> variable), but that seems almost backwards to me. I think it would
> make more sense to have beginners _know_ that functions are like all
> other variables and can therefore be passed by other functions or
> returned by other functions. That I think would be better accomplished
> if they define functions the same way you would define other variables
> that you know can be passed and returned.

I think it gets awkward fairly quick if you try and work out how to do 
this.  There have been requests in the past to have functions assigned to 
names like other things.

The nice thing about the current syntax is it more closely resembles what 
you would type at call time, so it is more self documenting.

    def sum(x, y):
        return x + Y

    total = sum(1, 2)


I think changing that would be trading one type of clarity for another.


Ron












From dominique.pignon at free.fr  Mon Sep 24 19:54:42 2007
From: dominique.pignon at free.fr (Dominique Pignon)
Date: Tue, 25 Sep 2007 01:54:42 +0200
Subject: Pyrex installation on windows XP: step-by-step guide
Message-ID: <000501c7ff06$4939cd40$0200a8c0@amilo>

Bravo pour le guide d'installation!
Je suppose que vous parlez fran?ais.
J'ai install? pyrex suivant vos conseils
tout se passe normalement
l'exemple primes est install? dans /Lib/site_packages/primes.pyd

le programme a ?t? compil? 
mais je n'arrive pas  ? faore le test le module n'est pas reconnu:

>>> primes
Traceback (most recent call last):
  File "<pyshell#4>", line 1, in -toplevel-
    primes
NameError: name 'primes' is not defined

que se passe-t-il?
cela doit sans doute ?tre trivial

merci de me r?pondre
Dominique Pignon
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From cjt22 at bath.ac.uk  Fri Sep  7 09:57:35 2007
From: cjt22 at bath.ac.uk (cjt22 at bath.ac.uk)
Date: Fri, 07 Sep 2007 06:57:35 -0700
Subject: Using s.sort([cmp[, key[,
	reverse]]]) to sort a list of objects based on a attribute
Message-ID: <1189173455.525144.326300@y42g2000hsy.googlegroups.com>

Hi there

I am fairly new to Python and have not really used regular expressions
before (I think this might be needed for my query) and wondered if you
could help

I have a step class and store in a list step instances
A step instance contains variables: name, startTime etc and startTime
is stored as a string %H:%M:%S

What I would like to do is to be able to sort this list of objects
based on the startTime object so that the first item in the list is
the object with the earliest Start time and last item is the object
with the last Start time.

I belive my key has to be = strpTime(step.sTime, "%H:%M:%S")
But don't know how to create the comparison funciton.

Any help on how I can perform this whole operation would be much
appreciated.

Thanks
Chris



From maxim.gavrilov at gmail.com  Mon Sep 24 14:31:56 2007
From: maxim.gavrilov at gmail.com (Vircom)
Date: Mon, 24 Sep 2007 11:31:56 -0700
Subject: Small changes in side library
In-Reply-To: <1190658364.739221.39030@k79g2000hse.googlegroups.com>
References: <1190509647.227883.226460@d55g2000hsg.googlegroups.com>
	<mailman.952.1190582159.2658.python-list@python.org>
	<1190658364.739221.39030@k79g2000hse.googlegroups.com>
Message-ID: <1190658716.773690.171020@50g2000hsm.googlegroups.com>

On Sep 24, 10:26 pm, Vircom <maxim.gavri... at gmail.com> wrote:
> On Sep 24, 1:16 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>
>
>
> > En Sat, 22 Sep 2007 22:07:27 -0300, maxim.gavri... at gmail.com
> > <maxim.gavri... at gmail.com> escribi?:
>
> > > I have the side library which provides wide set of different
> > > functions, but I'm going to replace some of them with mine and
> > > provided such 'modified' library thought my project.
>
> > > The following way works well for my purpose:
>
> > > ------- mylib.py -------
> > > import sidelib
>
> > > import os, sys, ....
>
> > > def func():
> > >     .....
> > > sidelib.func = func
> > > ......
> > > ?!?!?!?!
> > > --------------------------
>
> > > But this cause to write mylib.sidelib.func() to function call, is it
> > > any way to 'map' definitions from sidelib to mylib (possible at point
> > > marked ?!?!?!?!) such that constructions like mylib.func() will be
> > > provided and client code don't see difference between changed and
> > > original library in syntax way?
>
> > Your code already works as you like:
> > import sidelib
> > sidelib.func()
> > and you get the modified function.
>
> > You don't have to say mylib.sidelib.func - in fact, mylib.sidelib is the
> > same module object as sidelib
> > But you have to ensure that the replacing code (mylib.py) runs *before*
> > anyone tries to import something from sidelib.
>
> > > One my idea was to do from sidelib import * and then modify globals()
> > > dictionary, but this isn't good too because mylib imports many other
> > > modules and they all mapped into it's namespace (like mylib.os,
> > > mylib.sys).
>
> > As you said, a bad idea.
>
> > --
> > Gabriel Genellina
>
> Thank you for reply!
> I make a mistake in my problem description, because I'm going not only
> use my own functions (it'll be simple import library question), but
> also using side library many functions (with only a few one replaced
> by me). For now I'm stay at the following solution:
> ----- mylib.py -----
> import sidelib
> from sidelib import *
>
> _sidelib_set = set(dir(sidelib))
> _mylib_set = set(['replacedfunc1', 'replacedfunc2', ....]) # all
> exports
> __all__ = list(_sidelib_set.union(_mylib_set))
>
> ....implementations of _mylib_set functions....
> --------------------
>
> Seems it's pretty good for my task, mylib seems fully the same as the
> sidelib one.
>
> Thanks for you attention, anyway!

Sorry, I'm misunderstand your propose by first reading. Importing
sidelib after my changes are really the best idea. I'm changingmy
project this way.

Thank you!!!



From tuomas.vesterinen at pp.inet.fi  Tue Sep  4 11:33:55 2007
From: tuomas.vesterinen at pp.inet.fi (Tuomas)
Date: Tue, 04 Sep 2007 15:33:55 GMT
Subject: REGULAR EXPRESSION
In-Reply-To: <1188912767.360967.306050@y42g2000hsy.googlegroups.com>
References: <1188912767.360967.306050@y42g2000hsy.googlegroups.com>
Message-ID: <DVeDi.136$327.107@read3.inet.fi>

AniNair wrote:
> hi.. I am trying to match '+ %&/-' etc using regular expression  in
> expressions like 879+34343. I tried \W+   but it matches only in the
> beginning of the string Plz help Thanking you in advance...
> 

Is this what you are seeking for?

 >>> re.compile('(\+{0,1})?([0-9]+)').findall('879+34343')
[('', '879'), ('+', '34343')]

Tuomas Vesterinen


From wizzardx at gmail.com  Fri Sep 28 03:27:40 2007
From: wizzardx at gmail.com (David)
Date: Fri, 28 Sep 2007 09:27:40 +0200
Subject: marshal bug?
In-Reply-To: <18c1e6480709280011g1fcc4976v77dd0eec0e416752@mail.gmail.com>
References: <1190961020.258850.215130@g4g2000hsf.googlegroups.com>
	<18c1e6480709280011g1fcc4976v77dd0eec0e416752@mail.gmail.com>
Message-ID: <18c1e6480709280027p43b6fcd4v83c9d262953bae09@mail.gmail.com>

> I'm not sure why, but marshal does dump the 2 differently. ie:
>
> >>> marshal.dumps(str(123))
> 's\x03\x00\x00\x00123'
>
> >>> marshal.dumps(str("123"))
> 't\x03\x00\x00\x00123'
>

I've just checked the source [1].

's' refers to a regular string, 't' refers to an interned[2] string.

In other words the difference between the 2 marshal dumps is an
internal python implementation detail. You probably shouldn't be
comparing marshal dumps in your app in the first place.

[1] http://coverage.livinglogic.de/Python/marshal.c.html. (Actually, I
checked the downloaded bz2, but this is the only URL for marshal.c I
could find)
[2] http://mindprod.com/jgloss/interned.html


From shriphanip at gmail.com  Tue Sep 25 11:39:45 2007
From: shriphanip at gmail.com (Shriphani)
Date: Tue, 25 Sep 2007 08:39:45 -0700
Subject: comparing elements of a list with a string
Message-ID: <1190734785.439839.303030@50g2000hsm.googlegroups.com>

Hello all,
I have a problem here. I have a list named list_of_files which
contains filenames with their timestamps attached to the name. If I
have a string "fstab", and I want to list out the files in whose names
the word fstab appears should I go about like this :

def listAllbackups(file):
    list_of_files = os.listdir("/home/shriphani/backupdir")
    for element in list_of_files:
         if element.find(file) != -1:
             date = ###
             time = ####
              return (date, time)

The major trouble is that the return statement causes it to exit after
attempt one. How do I use the yield statement here?

Regards,
Shriphani Palakodety



From nagle at animats.com  Thu Sep 20 21:38:44 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 20 Sep 2007 18:38:44 -0700
Subject: M2Crypto 0.18 - new version, same old build bugs.
In-Reply-To: <1190325086.825866.319760@k79g2000hse.googlegroups.com>
References: <eiAIi.10067$924.3670@newssvr23.news.prodigy.net>
	<1190325086.825866.319760@k79g2000hse.googlegroups.com>
Message-ID: <54FIi.10130$z_5.1294@nlpi069.nbdc.sbc.com>

Paul Boddie wrote:
> On 20 Sep, 22:12, John Nagle <na... at animats.com> wrote:
> 
>>    That was for M2Crypto 0.17.
>>
>>    It's still broken in M2Crypto 0.18.
>>
>>    And there's no RPM or Windows binary.
>>
>>    Nobody actually uses this stuff, do they?
> 
> 
> I can find Ubuntu packages for 0.16 and 0.17:
> 
> http://packages.ubuntu.com/feisty/libs/python-m2crypto
> http://packages.ubuntu.com/gutsy/libs/python-m2crypto
> 
> So, clearly some people are managing to build the library, even if it
> isn't the absolute latest version. You might want to take a look at
> the source packages and the patches the distribution people apply,
> although it doesn't look like they are actually doing much patching.
> The source packages suggest that they use SWIG 1.3.24 to build
> M2Crypto - is that what you're using?
> 
> Paul

    I have builds of 0.17 of M2Crypto for both Linux and Windows. I want
the new bug fixes. The 0.17 version mishandles SSL certs that specify
more than one domain name, and that's supposedly fixed in 0.18.  But
there are enough changes that just copying over the relevant file
(Checker.py) isn't sufficient.

				John Nagle

					


From ldo at geek-central.gen.new_zealand  Sun Sep  9 02:56:16 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sun, 09 Sep 2007 18:56:16 +1200
Subject: pdb question - spew out "steps" until crash needed
References: <fbta9a$b2p$1@daisy.noc.ucla.edu>
	<7xbqcd4s2y.fsf@ruckus.brouhaha.com>
Message-ID: <fc05eg$aa2$7@lust.ihug.co.nz>

In message <7xbqcd4s2y.fsf at ruckus.brouhaha.com>, Paul Rubin wrote:

> However, the malloc problem has probably already screwed things up
> long before the application actually freezes.  Your best bet is
> to recompile Python with malloc debugging enabled and/or run Python
> itself under a debugger.

A simple thing to try would be to invoke Python with MALLOC_CHECK_ set to 3.
This enables extra checking in the glibc malloc routine, which might help
shed some light on the problem.


From __peter__ at web.de  Thu Sep 27 13:34:04 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 27 Sep 2007 19:34:04 +0200
Subject: getopt with negative numbers?
References: <1190913250.198794.269530@k79g2000hse.googlegroups.com>
Message-ID: <fdgpic$ssu$00$1@news.t-online.com>

Casey wrote:

> Is there an easy way to use getopt and still allow negative numbers as
> args?  I can easily write a workaround (pre-process the tail end of
> the arguments, stripping off any non-options including negative
> numbers into a separate sequence and ignore the (now empty) args list
> returned by getopt, but it would seem this is such a common
> requirement that there would be an option to treat a negative value as
> an argument.  Note that this is only a problem if the first non-option
> is a negative value, since getopt stops processing options as soon as
> it identifies the first argument value.
> 
> Alternatively, does optparse handle this?  I haven't used optparse (I
> know it is more powerful and OO, but you tend to stick with what you
> know, especially when it is part of my normal python programming
> template), but if it handles negative numbers I'm willing to learn it.

optparse can handle options with a negative int value; "--" can be used to
signal that no more options will follow:

>>> import optparse
>>> parser = optparse.OptionParser()
>>> parser.add_option("-a", type="int")
<Option at 0xb7d6fd8c: -a>
>>> options, args = parser.parse_args(["-a", "-42", "--", "-123"])
>>> options.a
-42
>>> args
['-123']

Without the "--" arg you will get an error:

>>> parser.parse_args(["-123"])
Usage:  [options]

: error: no such option: -1
$

Peter


From martin at v.loewis.de  Fri Sep 28 18:21:47 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 29 Sep 2007 00:21:47 +0200
Subject: Python  and SSL
In-Reply-To: <1190959345.041723.108130@k79g2000hse.googlegroups.com>
References: <1190959345.041723.108130@k79g2000hse.googlegroups.com>
Message-ID: <46fd7e7b$0$18410$9b622d9e@news.freenet.de>

> I need to use Python with SSL comunication betweeen servers.
> (I use hhtplib but I think urllib2 can also be used )
>  I think I need to use SSL root certificate and tell  a program to
> trust this certificate.

I don't think so - what the SSL module does is already fine for you.

> But how can I tell my Python program to trust my SSL certificate?

Why do you want to tell it that? The SSL module will trust *any*
server certificate, no need to tell it explicitly which ones to
trust.

> When I tried  before I received the error 503

That must be an independent error.

Regards,
Martin


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Sep  6 04:50:41 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 06 Sep 2007 10:50:41 +0200
Subject: How to do python and RESTful
In-Reply-To: <1189022079.403495.175800@g4g2000hsf.googlegroups.com>
References: <1189022079.403495.175800@g4g2000hsf.googlegroups.com>
Message-ID: <46dfbf61$0$19855$426a34cc@news.free.fr>

MarkyMarc a ?crit :
> Hi all,
> 
> I want to make a web service application in python and keywords are
> RESTful, python and nice urls(urls mapped to python objects).
> 
> I don't want a big framework but a nice small one, that can just do
> the things I want.
> 
> I have be looking at quixote, but is this uptodate? "plain"
> mod_python, can this make url to http put,get,delete and post?
> 
> Can some one here point me some where I can read about python and
> RESTful or have some experiences with other?
> 
You may want to have a look at Pylons (http://pylonshq.com).


From koutoo at hotmail.com  Fri Sep 28 11:43:54 2007
From: koutoo at hotmail.com (koutoo at hotmail.com)
Date: Fri, 28 Sep 2007 08:43:54 -0700
Subject: Delete spaces
Message-ID: <1190994234.526554.110870@y42g2000hsy.googlegroups.com>

If I have a text file that is delimited by spaces, how do I import it
and get to comma delimited?  Here is a row of data from the text file:

1    1    10:55:14  2    65   8.5
1.4+1.1                       2.5       Class-2   0

I tried a few examples from the group and it didn't work, since the
file also has a header row and a row of seperators ( -------).  The
lengths of each row is something like 130, so there are extra spaces
after the last value as well.  I have tried joining and other things,
but I couldn't figure out how to get the values to come together.
Thanks.

Kou



From cjt22 at bath.ac.uk  Tue Sep 11 02:41:21 2007
From: cjt22 at bath.ac.uk (cjt22 at bath.ac.uk)
Date: Mon, 10 Sep 2007 23:41:21 -0700
Subject: Using a time duration to print out data where every 2 seconds is
	a pixel
In-Reply-To: <13eb0b0d3mdhkcb@corp.supernews.com>
References: <1189427545.322679.260970@r29g2000hsg.googlegroups.com>
	<slrnfeaips.m47.hat@se-162.se.wtb.tue.nl>
	<mailman.319.1189432713.2658.python-list@python.org>
	<1189436278.456311.128260@22g2000hsm.googlegroups.com>
	<13eb0b0d3mdhkcb@corp.supernews.com>
Message-ID: <1189492881.419335.227580@r29g2000hsg.googlegroups.com>

 On Sep 10, 6:39 pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Mon, 10 Sep 2007 07:57:58 -0700, cj... at bath.ac.uk declaimed the
> following in comp.lang.python:
>
> > >from time import *
> > >startPoint = strptime(step.sTime, "%H:%S:%M")
> > >finishPoint = strptime(step.fTime, "%H:%S:%M")
>
> > >duration = mktime(startPoint) - mktime(finishPoint)
>
>         Ignoring the mktime() error, shouldn't those be reversed -- end
> times are larger than start times...
>
> > but it generates the error
>
> > >OverflowError: mktime argument out of range
>
>         I suspect you will need to supply a full date... mktime() wants
> calendar date/time values, not some HMS value that is relative to an
> arbitrary zero. That is, if your data is in the form "9h 5m, 20s from
> start of effort" you need to supply a dummy day representing "start of
> effort" (midnight probably)
>
>         Maybe look at the documentation for the datetime module -- in
> particular timedelta()
>
> >>> from datetime import timedelta
> >>> pStart = timedelta(hours=9, minutes=5, seconds=20)
> >>> pEnd = timedelta(hours=13, minutes=21, seconds=5)
> >>> dur = pEnd - pStart
> >>> print dur.days, dur.seconds, dur.microseconds
>
> 0 15345 0
> --
>         Wulfraed        Dennis Lee Bieber               KD6MOG
>         wlfr... at ix.netcom.com             wulfr... at bestiaria.com
>                 HTTP://wlfraed.home.netcom.com/
>         (Bestiaria Support Staff:               web-a... at bestiaria.com)
>                 HTTP://www.bestiaria.com/

Thanks for all the help, I will have a look at my errors today.

Can I also ask does anyone know how I could plot the "gannt chart"
looking representation of my data without having to install something
such as gnu plot. i.e. how would I simply work out how to move a space
accross the screen every 2 seconds, if a Step lasted 45 seconds for
example how would I represent that in terms of a print out with
spaces?

I hope that makes sense!



From apardon at forel.vub.ac.be  Fri Sep 14 10:35:37 2007
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 14 Sep 2007 14:35:37 GMT
Subject: An ordered dictionary for the Python library?
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<7xzlzrtrjn.fsf@ruckus.brouhaha.com>
	<1189664832.876539.86800@k79g2000hse.googlegroups.com>
	<7xps0mmig9.fsf@ruckus.brouhaha.com>
	<1189733708.659317.83950@y42g2000hsy.googlegroups.com>
	<1189753968.917636.310120@19g2000hsx.googlegroups.com>
	<slrnfekm8t.spv.apardon@rcpc42.vub.ac.be>
	<1189767415.814718.312870@k79g2000hse.googlegroups.com>
	<slrnfekt46.spv.apardon@rcpc42.vub.ac.be>
	<1189778191.529829.293320@19g2000hsx.googlegroups.com>
Message-ID: <slrnfel71p.spv.apardon@rcpc42.vub.ac.be>

On 2007-09-14, Mark Summerfield <m.n.summerfield at googlemail.com> wrote:
>> > Also, it does not provide the key(), value(), and item() methods that
>> > the API I proposed can support (because in an ordereddict, index
>> > positions make sense).
>>
>> At the time I wrote my module I never had a need for these. Do you have
>> a use case or is it a consideration of completeness that makes you want
>> these? Maybe I can take a look in how to implement this, but at this
>> moment it doesn't sound that usefull to me.
>
> I put them in for completeness, although in some contexts I have found
> the ability to ask for the n-th item to be v. useful.

If you don't have a use case, I advise you to drop them. As far as I
understand people's sentiments, including a feature without a use case
illustrating its usefullness will decrease your chances.

>> On the other hand your API doesn't seem to allow for iterating over only
>> a part of the keys. Supposing all keys are strings, I can easily iterate
>> over all keys that start with an 'n' or with any arbitrary prefix.
>> That IMO seems more usefull.
>
> That is an appealing feature---but I don't want to make any assumption
> about keys (they could be ints, id()s, strs, or anything that is
> acceptable to a dict.

The feature doesn't depend on any assumption. if your keys are integers
you can iterate over all keys between 121 and 8264. Iterating over all
keys that start with an 'n' just depends on the fact that all such
strings lie between the strings 'n' and 'o'.

However not all keys acceptable to a dict, will be acceptable to
a SortedDict. Some types are hashable but not completly comparable.
Those objects will not be usable as a key in a SortedDict although
they can be used as a key in an normal dict.

> There's nothing to stop you creating a PEP for your AVL tree---I'd
> certainly be glad for one to be in the collections module. I'm not
> advocating "only one" ordered data structure, but rather one
> particular one---and I certainly hope the collections module will have
> several eventually, and that other people will propose PEPs for other
> data structures, such as AVL trees, B*Trees, skiplists, etc., since
> all have something to offer.

I'm not interrested in writing a PEP. My impression from asking around
is that is too much work for too little chance to get it accepted.
That is more a personal evaluation of how I value my time and how much I
would prefer it to have my module included than about the PEP process
in itself.

If someone would like to use my avl module as a starting point for a PEP,
I may consider allowing that, but writing the PEP myself is going to
take too much time from other projects.

>> > If there was consensus on an API and you, me, and others had different
>> > implementations, we could always come up with some tests to compare
>> > their relative performance, and put the fastest one(s) forward in a
>> > PEP. (I don't care if my own code is used or not, it is the
>> > functionality in Python's standard library that I want, whoever's code
>> > it is.)
>>
>> Good luck on finding that consensus. If you really want this I fear you
>> will have to start writing that PEP before a consensus is reached and
>> hope to find a proposal that will be acceptable to the majority and
>> especially the BDFL.
>
> I don't expect my API to satisfy everyone, but by making it as close
> to what exists already, i.e., a dict, yet with keys that "happen" to
> be ordered (and offering a few extra methods to help users exploit
> that if they want), I am hoping this will make it more likely to be
> acceptable.

I wish you all the luck you can get. Maybe if you succeed I'll change
my mind about writing a PEP myself.

However I think your chances will increase if you write your module
and have it available in the cheese shop. If people start using your
module regularly, your chances of it being included in the standard
library will increase greatly.

-- 
Antoon Pardon

-- 
Antoon Pardon


From gregturn at mindspring.com  Wed Sep 12 08:50:09 2007
From: gregturn at mindspring.com (Goldfish)
Date: Wed, 12 Sep 2007 05:50:09 -0700
Subject: Python Database Apps
In-Reply-To: <mailman.438.1189600804.2658.python-list@python.org>
References: <1189479130.905136.196820@r34g2000hsd.googlegroups.com>
	<mailman.387.1189521302.2658.python-list@python.org>
	<1189536987.259907.68650@e34g2000pro.googlegroups.com>
	<mailman.438.1189600804.2658.python-list@python.org>
Message-ID: <1189601409.752125.47740@r34g2000hsd.googlegroups.com>

I use MySQL and also sqlite. However, I also use Spring Python (http://
springpython.python-hosting.com) to use both its DatabaseTemplate
utility class and also the remoting functionality. This way, I can
have the database code sitting on the server, and then export the data
access functions remotely to clients. It is also relatively easy to
swap out database engines.

For the record: Spring Python is my pet project. I use it myself, and
recommend it to others as well.



From mahs at telcopartners.com  Fri Sep 14 14:14:23 2007
From: mahs at telcopartners.com (Michael Spencer)
Date: Fri, 14 Sep 2007 11:14:23 -0700
Subject: subclass of integers
In-Reply-To: <1189780201.692192.291010@k79g2000hse.googlegroups.com>
References: <1189780201.692192.291010@k79g2000hse.googlegroups.com>
Message-ID: <fcej26$168$1@sea.gmane.org>

Mark Morss wrote:
> I would like to construct a class that includes both the integers and
> None.  I desire that if x and y are elements of this class, and both
> are integers, then arithmetic operations between them, such as x+y,
> return the same result as integer addition.  However if either x or y
> is None, these operations return None.
> 
> It's simple enough to construct a subclass of integers that behave in
> this way:
> 
> class Nint(int):
>     def __add__(self,other):
>         if (other != None):
>             return self+other
>         else:
>             return None
>     def __radd__(self,other):
>         if (other != None):
>             return other+self
>         else:
>             return None
>     #...and so forth
> 
> However I have not been able to figure out how to make it so that
> None, as well as an integer, could be an element of my class.  My
> preliminary impression is that I have to override int.__new__; but I
> am uncertain how to do that and have been unable to find anything on
> the web explaining that.  Indeed I haven't been able to find much
> about __new__ at all.  Overriding this method of built-in classes
> seems to be quite unusual.
> 
> I would very much appreciate anyone's help.
> 
Do you really need to define one class that can represent None and the integers? 
   integers already behave as you want, except that they cannot do binary 
operations with None.  So why not simply define a NoneInt object?

  >>> class NoneInt(object):
  ...     def _all_binops(self, other):
  ...         if isinstance(other, (int, NoneInt)):
  ...             return NoneInt()
  ...         else:
  ...             raise TypeError()
  ...     __add__ = __radd__ = _all_binops
  ...     # ...add comparison, unary methods to taste
  ...     def __repr__(self):
  ...         return "NoneInt()"
  ...
  >>> 3+NoneInt()
  NoneInt()
  >>> NoneInt()+2
  NoneInt()
  >>> "s"+NoneInt()
  Traceback (most recent call last):
    File "<input>", line 1, in <module>
    File "<input>", line 6, in _all_binops
  TypeError
  >>>

Getting back to your question, you can indeed override int.__new__ to return 
something other than a raw int.  This explains how and why:
http://www.python.org/download/releases/2.2.3/descrintro/
But unless there's more to your requirement than you set out above, it's 
probably not worth the trouble.

HTH, Michael





From ironfroggy at gmail.com  Fri Sep 14 02:44:18 2007
From: ironfroggy at gmail.com (Calvin Spealman)
Date: Fri, 14 Sep 2007 02:44:18 -0400
Subject: "once" assigment in Python
In-Reply-To: <1189750616.597409.85380@w3g2000hsg.googlegroups.com>
References: <1189750616.597409.85380@w3g2000hsg.googlegroups.com>
Message-ID: <76fd5acf0709132344g3b62415fhac330f2309439dfc@mail.gmail.com>

This is one of the things that I often see people trying to do in
Python, where the best solution is simply to understand how Python
works and craft the code to work with the language. The problem, in my
view, is not that you don't have a good way to do this "once
assignment" operation, but that you are in a position where you don't
know if a name has been assigned to or not. Yes, Python is a very
dynamic language, but that doesn't mean you should exploit this to be
so dynamic that you don't know the state of your own code at a given
point.

If you don't know that a name has been assigned to or not, there are
only a few kinds of structures that lead to such a lack of state
knowledge and all of them are avoidable. A common idiom might go along
the lines of:

if A:
    B = value

Now, if A is false we might not have B defined at all, turning a
condition into an error (a raised NameError if we try to use B. What
we need to do is either find an alternative value, a default value to
assign before all this, or do everything with the value inside the if
block, and not conditionally create names.

There is no good way to do your "once assignment", and that isn't an
accident. Your code is fragile if you don't know what variables you
have. Depending on the type, there are some good solutions. if the
value cannot be None or if its only numbers, for example, you can do
this:

B = B or value

Now it only changes it if B is None or 0, depending on the case. This
may or may not help you. If you use a default None, you can also just
check for that identity explicitly.

On 9/14/07, Lorenzo Di Gregorio <lorenzo.digregorio at gmail.com> wrote:
> Hello,
>
> I've been using Python for some DES simulations because we don't need
> full C speed and it's so much faster for writing models.  During
> coding I find it handy to assign a variable *unless it has been
> already assigned*: I've found that this is often referred to as "once"
> assigment.
>
> The best I could come up with in Python is:
>
> try:
>   variable
> except NameError:
>   variable = method()
>
> I wonder if sombody has a solution (trick, whatever ...) which looks
> more compact in coding.  Something like:
>
> once(variable, method)
>
> doesn't work, but it would be perfect.  Of course I can preprocess the
> Python code but an all-Python solution would be more handy.
>
> Any suggestions?
>
> Thx in advance,
> Lorenzo
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
Read my blog! I depend on your acceptance of my opinion! I am interesting!
http://ironfroggy-code.blogspot.com/


From steve at holdenweb.com  Fri Sep  7 14:53:54 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 07 Sep 2007 11:53:54 -0700
Subject: Is a Borg rebellion possible? (a metaclass question)
In-Reply-To: <1189180478.257790.60160@g4g2000hsf.googlegroups.com>
References: <1189168282.665210.260840@19g2000hsx.googlegroups.com>	<mailman.220.1189171663.2658.python-list@python.org>
	<1189180478.257790.60160@g4g2000hsf.googlegroups.com>
Message-ID: <fbs6o3$ri2$1@sea.gmane.org>

Andr? wrote:
> On Sep 7, 10:27 am, Carsten Haese <cars... at uniqsys.com> wrote:
>> On Fri, 2007-09-07 at 12:31 +0000, Andr? wrote:
>>> In my application, I make use of the Borg idiom, invented by Alex
>>> Martelli.
>>> class Borg(object):
>>>     '''Borg Idiom, from the Python Cookbook, 2nd Edition, p:273
>>>     Derive a class form this; all instances of that class will share
>>> the
>>>     same state, provided that they don't override __new__; otherwise,
>>>     remember to use Borg.__new__ within the overriden class.
>>>     '''
>>>     _shared_state = {}
>>>     def __new__(cls, *a, **k):
>>>         obj = object.__new__(cls, *a, **k)
>>>         obj.__dict__ = cls._shared_state
>>>         return obj
>>> ----
>>> This has worked very well so far, but is starting to impose some
>>> unwanted constraints on my program design.
>>> What I would like to do is, to put it figuratively, create a Borg
>>> rebellion with various splinter groups.  In concrete Python terms, I
>>> would like to have
>>> class MyClass(Borg, ...):
>>>    ...
>>> seven_of_nine = MyClass(...)  # part of group "BORG"
>>> two_of_nine = MyClass(...)
>>> splinter1 = MyClass(..., group='splinter')
>>> splinter2 = MyClass(..., group='splinter')
>>> and have splinter 1 and splinter2 share the same state, but a
>>> different state than the one shared by members of the BORG collective.
>>> Any suggestions from the metaclass experts?
>> You don't need a metaclass. Just turn _shared_state into a dictionary of
>> shared states, keyed by the group name:
>>
>> class SplinterBorg(object):
>>     _shared_states = {}
>>     def __new__(cls, *a, **k):
>>         group = k.pop("group","BORG")
>>         obj = object.__new__(cls, *a, **k)
>>         obj.__dict__ = cls._shared_states.setdefault(group,{})
>>         return obj
>>
>> HTH,
>>
>> --
>> Carsten Haesehttp://informixdb.sourceforge.net
> 
> Unfortunately, it fails.  Here's what I tried, followed by the
> traceback
> class SplinterBorg(object):
>     _shared_states = {}
>     def __new__(cls, *a, **k):
>         group = k.pop("group","BORG")
>         obj = object.__new__(cls, *a, **k)
>         obj.__dict__ = cls._shared_states.setdefault(group,{})
>         return obj
> 
> class MyClass(SplinterBorg):
>    def __init__(self, name):
>        self.name = name
> 
> a1 = MyClass('a')
> a2 = MyClass('aa')
> b1 = MyClass('b', group="B")
> 
> 
> Traceback (most recent call last):
>   File "test.py", line 15, in <module>
>     b1 = MyClass('b', group="B")
> TypeError: __init__() got an unexpected keyword argument 'group'
> 
> 
Because your subclass signature is completely wrong. Why did you feel 
you had to add an __init__() method to your subclass? This has two bvad 
effects:

1. It stops the super-class's __init__() method from being called, and

2. It breaks the calling syntax specified in the superclass.

All you really need is to create your SplinterBorgs with appropriate 
group names, you don't neef subclasses at all:

a1 = SplinterBorg(group="one")
a2 = SplinterBorg(group="two")

and so on.

If you want to create subclasses then they should work like this:

class MyBorg1(SplinterBorg):
     def __init__(self):
         SplinterBorg.__init__(self, group='borg1')

and so on, with a different group for each. But this seems over complicated.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
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----------- Thank You for Reading -------------



From bj_666 at gmx.net  Tue Sep 18 09:10:09 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 18 Sep 2007 13:10:09 GMT
Subject: Memory Problem
References: <mailman.710.1190118615.2658.python-list@python.org>
Message-ID: <5la11gF71rf0U2@mid.uni-berlin.de>

On Tue, 18 Sep 2007 14:06:22 +0200, Christoph Scheit wrote:

> Then the data is added to a table, which I use for the actual Post-Processing.
> The table is actually a Class with several "Columns", each column internally
> being represented by array.

Array or list?

> # create reader
> breader = BDBReader("<var>", "<type>", "#")
>  
> # read data
> bData = breader.readDB(dbFileList[0])
> 
> # create table
> dTab = DBTable(breader.headings, breader.converters, [1,2])
> addRows(bData, dTab)
> 
> Before I add a new entry to the table, I check if there is already an entry 
> like this. To do so, I store keys for all the entries with row-number in a
> dictionary. What about the memory consumption of the dictionary?

The more items you put into the dictionary the more memory it uses.  ;-)

> Here the code for adding a new row to the table:
> 
> # check if data already exists
> if (self.keyDict.has_key(key)):
>         rowIdx = self.keyDict[key]
>         for i in self.mutableCols:
>             self.cols[i][rowIdx] += rowData[i]
>         return
>             
>  # key is still available - insert row to table
>  self.keyDict[key] = self.nRows
>         
>  # insert data to the columns
>  for i in range(0, self.nCols):
>      self.cols[i].add(rowData[i])
>         
>  # add row i and increment number of rows
>  self.rows.append(DBRow(self, self.nRows))
>  self.nRows += 1
> 
> Maybe somebody can help me. If you need, I can give more implementation
> details.

IMHO That's not enough code and/or description of the data structure(s). 
And you also left out some information like the number of rows/columns and
the size of the data.

Have you already thought about using a database?

Ciao,
	Marc 'BlackJack' Rintsch


From deets at nospam.web.de  Sat Sep 22 06:37:49 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 22 Sep 2007 12:37:49 +0200
Subject: find difference in days from YYYYMMDD to YYYYMMDD
In-Reply-To: <mailman.920.1190453625.2658.python-list@python.org>
References: <mailman.920.1190453625.2658.python-list@python.org>
Message-ID: <5lk9kqF8h45eU1@mid.uni-berlin.de>

Konstantinos Pachopoulos schrieb:
> Hi,
> does any body now any such algorith? to find difference in days from 
> YYYYMMDD to YYYYMMDD?
> Or just an algorithm, that converts YYYYMMDD to seconds since the epoch?

See the modules datetime and time in the standard library.

Diez


From lasses_weil at klapptsowieso.net  Fri Sep  7 21:56:10 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Sat, 08 Sep 2007 03:56:10 +0200
Subject: Checking if elements are empty
In-Reply-To: <fbsqqs$efc$2@lust.ihug.co.nz>
References: <2323A6D37908A847A7C32F1E3662C80E010A0246@dc1ex01.air.org>
	<fbme5d$qa$1@sea.gmane.org>
	<mailman.93.1189003016.2658.python-list@python.org>
	<fbqedh$31g$1@lust.ihug.co.nz>
	<46e115e5$0$7691$9b4e6d93@newsspool2.arcor-online.net>
	<fbsqqs$efc$2@lust.ihug.co.nz>
Message-ID: <46e2013a$0$7687$9b4e6d93@newsspool2.arcor-online.net>

Lawrence D'Oliveiro wrote:
>>>> if y[0]:
>>> Not a good idea.
>> Why not?
> 
> Because there is a situation where your version of the test will fail even
> if the first element of y is non-null.

Such as? Seriously people, a little more verbosity wouldn't hurt here. 
This isn't a mystery game.

/W


From Shawn at Milochik.com  Thu Sep 20 11:44:25 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Thu, 20 Sep 2007 11:44:25 -0400
Subject: Finding prime numbers
In-Reply-To: <1190302258.922419.113030@w3g2000hsg.googlegroups.com>
References: <1190218927.7991.25.camel@apprentice-laptop>
	<82b4f5810709190931u16ee0621xc6608d2bcb2fec5e@mail.gmail.com>
	<1190219929.7991.28.camel@apprentice-laptop>
	<2dc0c81b0709191013k181d1a74m76a08cecadb005c4@mail.gmail.com>
	<mailman.777.1190222135.2658.python-list@python.org>
	<1190225821.182650.227540@k79g2000hse.googlegroups.com>
	<mailman.779.1190226722.2658.python-list@python.org>
	<1190302258.922419.113030@w3g2000hsg.googlegroups.com>
Message-ID: <2dc0c81b0709200844r5d9ba024wfc3601ca2517eb97@mail.gmail.com>

On 9/20/07, kyosohma at gmail.com <kyosohma at gmail.com> wrote:
> On Sep 19, 1:31 pm, "Shawn Milochik" <Sh... at Milochik.com> wrote:
> > > If you'd just search the archives, you would have found this:
> >
> > >http://groups.google.com/group/comp.lang.python/browse_thread/thread/...
> >
> > Yeah, but that's no fun. ;o)
>
> Yes! Never do what you can fool others into doing for you.
>
> Mike
>

Maybe for some people, but for me it's more fun to figure it out on my
own. By the "no fun" part, I meant that it wouldn't be fun to just
find the answer in an old thread instead of writing code to find
primes myself.


From mail at timgolden.me.uk  Fri Sep 21 10:06:40 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Fri, 21 Sep 2007 15:06:40 +0100
Subject: SHOCK: WHY None?
In-Reply-To: <1190383137.015553.235870@o80g2000hse.googlegroups.com>
References: <1190383137.015553.235870@o80g2000hse.googlegroups.com>
Message-ID: <46F3CFF0.7090709@timgolden.me.uk>

n00m wrote:
> def f(i,sm):
>     if i+1==len(a):
>         print sm+a[i]
>         return sm+a[i]
>     else:
>         f(i+1,sm+a[i])
> 
> a=[1,2,3,4,5]
> 
> print f(0,0)
> 
> 
> 15
> None

You're not actually returning anything from
the recursive call.

TJG


From bdesth.quelquechose at free.quelquepart.fr  Sat Sep  8 14:14:38 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 08 Sep 2007 20:14:38 +0200
Subject: startswith( prefix[, start[, end]]) Query
In-Reply-To: <mailman.235.1189186328.2658.python-list@python.org>
References: <1189087752.538726.101350@r29g2000hsg.googlegroups.com>	<46e00d7e$0$16413$426a74cc@news.free.fr>	<1189145398.081080.59580@r34g2000hsd.googlegroups.com>	<mailman.206.1189147329.2658.python-list@python.org>	<46e10284$0$439$426a34cc@news.free.fr>
	<mailman.235.1189186328.2658.python-list@python.org>
Message-ID: <46e5b38d$0$30530$426a74cc@news.free.fr>

Steve Holden a ?crit :
> Bruno Desthuilliers wrote:
> 
>> Steve Holden a ?crit :
> 
> [...]
> 
>>>
>>> Probably not really necessary, though, and they do say that premature 
>>> optimization is the root of all evil ...
>>
>>
>> I wouldn't call this one "premature" optimization, since it doesn't 
>> change the algorithm, doesn't introduce (much) complication, and is 
>> proven to really save on lookup time.
>>
>> Now I do agree that unless you have quite a lot of prefixes to test, 
>> it might not be that necessary in this particular case...
> 
> 
> The defense rests.

Sorry, I don't understand this one (please bare with a poor french boy).



From orsenthil at gmail.com  Tue Sep 11 09:56:41 2007
From: orsenthil at gmail.com (O.R.Senthil Kumaran)
Date: Tue, 11 Sep 2007 19:26:41 +0530
Subject: urllib2: handle an error (302)
In-Reply-To: <75eeb70e0709102158m2388e4h5988b0d6433f3bb3@mail.gmail.com>
References: <75eeb70e0709102158m2388e4h5988b0d6433f3bb3@mail.gmail.com>
Message-ID: <20070911135641.GB3614@gmail.com>

> When urllib2 libs visit a URL with 302 error follow the location
> automatically. I need to get the location  in order to get the full
> URL (not relative URL) parsing html code.

urllib2 automatically handles the 302 redirection. What you get as the end result is the 'redirected' page. 
- If all you want is the 'redirected' page. Blindly use urllib2, it handles it.
- If you want a 'smarter' way of handling redirection, then you might have to extend the HTTPRedirectHandler.

A very good example is provided by Mark Pilgrim in his 'Dive Into Python'.
Have a look here:
http://www.diveintopython.org/http_web_services/index.html

Example 11.1 openanything.py


Implement your program along those lines.

Thanks,
Senthil

-- 
O.R.Senthil Kumaran
http://uthcode.sarovar.org


From steve at REMOVE-THIS-cybersource.com.au  Sun Sep 23 06:55:46 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sun, 23 Sep 2007 10:55:46 -0000
Subject: Factory function with keyword arguments
References: <13fbl9ertj5es12@corp.supernews.com>
	<mailman.938.1190537767.2658.python-list@python.org>
Message-ID: <13fchhi2mnm5tc8@corp.supernews.com>

On Sun, 23 Sep 2007 03:55:45 -0500, Ron Adam wrote:

> Steven D'Aprano wrote:
>> I'm writing a factory function that needs to use keywords in the
>> produced function, not the factory. Here's a toy example:

[snip]

Thanks everyone who answered, you've given me a lot of good ideas.

I've run some tests with timeit, and most of the variants given were very 
close in speed. The one exception was (not surprisingly) my version that 
builds a tuple, puts it in a list, then converts it to a dict, *before* 
doing anything useful with it. It was 3-4 times slower than the others.

George's version, with two definitions of foo(), was the fastest. The 
second fastest was the variant using exec, which surprised me a lot. I 
expected exec to be the slowest of the lot. Unfortunately, I doubt that 
these would scale well as the factory becomes more complicated.

Excluding those two, the next fastest was the original code snippet, the 
one I rejected as clearly too slow! It's apparently faster to check a 
flag than it is build and then expand a dict for keyword arguments.

A valuable lesson... always measure before guessing whether code will be 
slow or not.



-- 
Steven.


From info at thegrantinstitute.com  Tue Sep  4 02:00:38 2007
From: info at thegrantinstitute.com (Anthony Jones)
Date: 03 Sep 2007 23:00:38 -0700
Subject: Professional Grant Proposal Writing Workshop (September 2007: Simon
	Fraser University)
Message-ID: <20070903230038.9EE0907498E7462D@thegrantinstitute.com>

An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070903/cccfd263/attachment.html>

From kyosohma at gmail.com  Wed Sep 19 10:09:12 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 19 Sep 2007 07:09:12 -0700
Subject: Drag image
In-Reply-To: <1190181974.468405.126430@z24g2000prh.googlegroups.com>
References: <1190181974.468405.126430@z24g2000prh.googlegroups.com>
Message-ID: <1190210952.761429.289620@o80g2000hse.googlegroups.com>

On Sep 19, 1:06 am, ndoe <ndoe_JTK... at yahoo.co.id> wrote:
> i want show image from button? and the image can be drag and rezise ?
> any body help me!!! i try to make it but is not  sucsseful yet

Please post some code so we can see what you're up to.

Mike



From paul.hankin at gmail.com  Mon Sep 24 10:23:55 2007
From: paul.hankin at gmail.com (Paul Hankin)
Date: Mon, 24 Sep 2007 14:23:55 -0000
Subject: Converting numbers to unicode charaters
In-Reply-To: <1190641342.127770.115610@y42g2000hsy.googlegroups.com>
References: <1190641342.127770.115610@y42g2000hsy.googlegroups.com>
Message-ID: <1190643835.058229.204330@d55g2000hsg.googlegroups.com>

On Sep 24, 2:42 pm, byte8b... at gmail.com wrote:
> Here's how I'm doing this right now, It's a bit slow. I've just got
> the code working. I was wondering if there is a more efficient way of
> doing this... simple example from interactive Python:
>
> >>> word = ''
> >>> hexs = ['42', '72', '61', '64']
> >>> for h in hexs:
>
> ...   char = unichr(int(h, 16))
> ...   word += char
> ...   print char
> ...
> B
> r
> a
> d>>> print word
>
> Brad
>
> Each hex_number is two digits. unichr converts that to a character
> that I append to previous ints that have been converted to chars. In
> this way, I convert a string of hex numbers to ints to letters, to
> words.

The cleanest code is:

word = ''.join(unichr(int(h, 16)) for h in hexs)

If you want fast, you can build a cache once that maps hex strings to
unicode characters something like this:

cache = dict((hex(i)[2:], unichr(i)) for i in range(256))

Then use something like your code:
word = ''
for h in hexs:
  word += cache[h]

Or a list comprehension:
word = ''.join([cache[h] for h in hexs])

Or a generator:
word = ''.join(cache[h] for h in hexs)

--
Paul Hankin



From erik at myemma.com  Sat Sep 15 12:15:31 2007
From: erik at myemma.com (Erik Jones)
Date: Sat, 15 Sep 2007 11:15:31 -0500
Subject: how to join array of integers?
In-Reply-To: <46EBE498.9040800@ehas.org>
References: <1189859762.563599.269270@g4g2000hsf.googlegroups.com>
	<a23effaf0709150551g19c611eqe1c912acf02306d3@mail.gmail.com>
	<46EBE498.9040800@ehas.org>
Message-ID: <48B48092-168D-4547-8EA7-BB0B59B7C38A@myemma.com>


On Sep 15, 2007, at 8:56 AM, Arnau Sanchez wrote:

> js escribi?:
>
>>> On 9/15/07, Summercool <Summercoolness at gmail.com> wrote:
>
>>> in Python... is the method to use  ",".join() ?  but then it must  
>>> take
>>> a list of strings... not integers...
>>>
>>> any fast method?
>
>> print ''.join([str(i) for i in [1,2,3]])
>
> It's better to use generator comprehension instead of LC:
>
> ",".join(str(i) for i in [1, 2, 3])

Why is that?  That entire expression must be evaluated to obtain the  
result, so what is the advantage of using a generator comprehension  
v. a list comprehension?




From m.n.summerfield at googlemail.com  Wed Sep 12 09:54:10 2007
From: m.n.summerfield at googlemail.com (Mark Summerfield)
Date: Wed, 12 Sep 2007 13:54:10 -0000
Subject: An ordered dictionary for the Python library?
In-Reply-To: <1189601205.503841.327170@o80g2000hse.googlegroups.com>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<13efnmi4n959a59@corp.supernews.com>
	<1189601205.503841.327170@o80g2000hse.googlegroups.com>
Message-ID: <1189605250.186948.303130@50g2000hsm.googlegroups.com>

On 12 Sep, 13:46, Michele Simionato <michele.simion... at gmail.com>
wrote:
> On Sep 12, 2:42 pm, Steven D'Aprano <st... at REMOVE-THIS-
>
> cybersource.com.au> wrote:
> > On Wed, 12 Sep 2007 07:33:45 +0000, Mark Summerfield wrote:
> > In fact, I'm not sure what people mean by ordered dicts. I assume they
> > mean the keys are ordered, not the values. But ordered by what? Insertion
> > order? Modification order? Alphabetical order?
>
> Insertion order.
>
>  M.S.


Actually I meant by key order, so insertion order doesn't matter at
all. If you need a dictionary-like data structure that respects
insertion order you could use a list of (key, value) tuples.

Another respondent asked about use cases.

I have found time and again that I needed (key, value) pairs where the
key is some string that provides a representation for human readers
and the value is some internal key (e.g., database ID) that the system
uses internally. In these cases I often need to present the user with
a list of items from which to choose and want to present them in
sorted order. Naturally, I could use an ordinary dict and then do
this:

for string in sorted(d.keys()):
    process(string)

But what happens when I need to do this a *lot* and when the number of
items is hundreds or a few thousands? I'm having to sort again and
again, since it is often the case that the items in the list changes
during the runtime of the application. So my solution in C++ is to use
an ordered dictionary (a map in C++ jargon), which in Python means I
can simply write:

for string in od.keys():
    process(string)

Another situation where this is useful is if you need to hold lists of
strings preserving case but want them to be presented case-
insensitively. Here, you populate the ordered dictionary like this:

for string in somelist:
    od[string.lower()] = string

Now you can iterate over od in case-insensitive order and yet still
have access to the case-sensitive original, and never have to
explicitly sort the strings.

I think it comes down to the nail and hammer issue: if you have a
hammer all problems look nail shaped. In Python we have dict and list
so everything looks suitable for those data structures. But having had
a wrench (ordered dictionaries) in C++, I find that some problems need
a wrench. I think that once Python programmers have access to an
ordered dictionary some proportion of them will find it painful to
program without it, so I really think it belongs in the standard
library.



From wolf_tracks at invalid.com  Tue Sep 18 13:23:02 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Tue, 18 Sep 2007 17:23:02 GMT
Subject: Tutorial or Example (or Tutorial) of Using Canvas to Produce
	a Plot
In-Reply-To: <13evohih7rkd030@corp.supernews.com>
References: <phRHi.50851$Um6.35199@newssvr12.news.prodigy.net>
	<13evohih7rkd030@corp.supernews.com>
Message-ID: <WPTHi.5906$FO2.4148@newssvr14.news.prodigy.net>

What would be appropriate? What are the choices? I'm pretty new to Python, 
but am familiar with the XWindow widget set. I think it is available under 
Python, but if there's a more suitable choice, that's fine. I would think 
Tkinter would be the simplest choice. Yes, Tkinter would be preferable. It 
seems to be the GUI of choice.

Grant Edwards wrote:
> On 2007-09-18, W. Watson <wolf_tracks at invalid.com> wrote:
> 
>> I'm looking for an example with canvas that produces, say, a
>> complete x-y plot of some data.
> 
> With what widget set?
> 

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From steve at REMOVE-THIS-cybersource.com.au  Mon Sep  3 09:34:59 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Mon, 03 Sep 2007 13:34:59 -0000
Subject: Adding attributes stored in a list to a class dynamically.
References: <mailman.297.1188755850.28954.python-list@python.org>
	<1i3t9va.1jkz4om1sajk8pN%aleax@mac.com>
	<1188769303.724140.248630@d55g2000hsg.googlegroups.com>
	<13dmehro14cjp05@corp.supernews.com>
	<1188794274.562413.70140@k79g2000hse.googlegroups.com>
Message-ID: <13do3c36rlqn873@corp.supernews.com>

On Mon, 03 Sep 2007 04:37:54 +0000, Brian Munroe wrote:

> On Sep 2, 3:33 pm, Steven D'Aprano <st... at REMOVE-THIS-
> cybersource.com.au> wrote:
> 
> 
>> In a nutshell, like all double-underscore methods, __setattr__ are for
>> overriding behaviour in your own classes. With very few exceptions, you
>> shouldn't need to directly call double-underscore methods (although you
>> often may _write_ double-underscore methods).
>>
>>
> I think I understand.  You are saying that if I wanted to override the
> normal behavior when doing something like
> 
>     p1.firstName = "Brian"
> 
> then I'd override __setattr__()?
> 
> But if I am doing something like creating dynamic attributes, the more
> 'correct' way is to use setattr?  Even though they both appear to do the
> same thing, the more Pythonic way is to never directly call magic
> methods (if you can help it)?


No, they don't do the same thing.

The normal way of accessing an object attribute is with the dot operator:

obj.name

Behind the scenes, Python does a whole lot of magic to make that work. 
Under *normal* circumstances, when you write "obj.name" Python looks for 
an attribute called "name", and returns whatever it finds. The *details* 
of the lookup process itself can be as simple as "look in obj.__dict__" 
or it can be significantly more complicated if obj has slots and super-
classes and properties. But don't worry about the complications, just 
think of "look up an attribute" as a single operation for now.

What if you don't know the name of the attribute when you are writing 
your code, but only at runtime? You want something like this:

s = "na" + "me" # We don't know this until runtime.
obj.s

but that doesn't work, because Python looks up an attribute called s.

That's where getattr(), setattr() and delattr() come into play: you can 
give the name of the attribute as a string at runtime, not hard coded in 
your source code: getattr(obj, s) evaluates s as the string "name", then 
looks up the attribute called "name" just as if you had written obj.name.

Now, what about __getattr__ __setattr__ and __delattr__? They too take 
the name of the attribute as a string, but that's about the only 
similarity with the non-underscore versions. They exist for a completely 
different reason.

The underscore versions are for customizing the lookup process, not for 
dynamically looking up names. If your class needs to do something non-
standard when you write obj.name, you might need to write methods 
__getattr__ etc.

Regardless of whether your attribute lookup was from obj.name or from 
getattr(obj, "name"), when Python goes to do the actual lookup, it will 
call on the double-underscore versions if needed:

if the __getattr__ method exists, it is ONLY called if the lookup fails;

if the __getattribute__ method exists, it is called for EVERY lookup;

if the __setattr__ method exists, it is called when you try to assign to 
an attribute;

if the __delattr__ method exists, it is called when you try to delete an 
attribute.


In a nutshell: getattr() etc. are for looking up attributes dynamically 
when you don't know the name of the attribute until runtime. __getattr__ 
etc. are for looking up attributes when you need to compute the value on 
the fly. (But an easier, less troublesome way of doing that is with 
properties.)



-- 
Steven.


From anuraguniyal at gmail.com  Wed Sep 26 08:18:24 2007
From: anuraguniyal at gmail.com (Anurag)
Date: Wed, 26 Sep 2007 05:18:24 -0700
Subject: Getting rid of bitwise operators in Python 3?
In-Reply-To: <46f49740$0$32514$4c368faf@roadrunner.com>
References: <46f49740$0$32514$4c368faf@roadrunner.com>
Message-ID: <1190809104.614963.165400@22g2000hsm.googlegroups.com>

On Sep 22, 8:44 am, Carl Banks <pavlovevide... at gmail.com> wrote:
> Anyone with me here?  (I know the deadline for P3 PEPs has passed; this
> is just talk.)
>
> Not many people are bit-fiddling these days.  One of the main uses of bit
> fields is flags, but that's not often done in Python because of keyword
> arguments and dicts, which are lot more versatile.  Another major use,
> talking to hardware, is not something oft done in Python either.
>
Actually I think many people are not using many operators now
days..lets remove them all
e.g. I searched one of my downloder script and it doesn't have '+'
operator
lets remove it!

-Anurag



From bj_666 at gmx.net  Mon Sep 24 05:03:16 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 24 Sep 2007 09:03:16 GMT
Subject: Passing parameters at the command line (New Python User)
References: <1190621098.582906.49760@r29g2000hsg.googlegroups.com>
Message-ID: <5lpcqkF95s07U2@mid.uni-berlin.de>

On Mon, 24 Sep 2007 01:04:58 -0700, cjt22 wrote:

>     for i in range(len(args)):
>         if args[i] == "-no":
>             Initialise.init(0)
>             Process.processCon(file2,1)
>             Output.print()
> 
>         if args[i] == "-not":
>            Initialise.init(1)
>             Process1.process(stepStore, firstSteps)
>             Output.print1()

That ``for`` loop is an anti-pattern in Python.  If you want to iterate
over the elements of `args` the just do it directly instead of using an
index:

    for arg in args:
        if arg == '-no':
            # ...

If you need the element *and* an index:

    for i, arg in enumarate(args):
        # ...

Ciao,
	Marc 'BlackJack' Rintsch


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Sep  7 03:26:10 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 07 Sep 2007 09:26:10 +0200
Subject: why should I learn python
In-Reply-To: <mailman.192.1189121055.2658.python-list@python.org>
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>	<87zlzzs9by.fsf@wilson.homeunix.com>	<1189119676.239459.325280@w3g2000hsg.googlegroups.com>
	<mailman.192.1189121055.2658.python-list@python.org>
Message-ID: <46e0fd0c$0$2273$426a74cc@news.free.fr>

Tom Brown a ?crit :
> On Thursday 06 September 2007 16:01, windandwaves wrote:
>> Hmmm, thank you all for your replies.  I will do some research on the
>> net (i did some already, but because I am really not much of a
>> programmer, it is often too detailed for me).  I have limited time,
>> but it does sound like something to learn, just for fun and for
>> practical use.  How would you use it in a web development
>> environment?  I mean, in real practical terms.  Could it assist with
>> php? Is it easy to write GUI programs in Python?
> 
> Checkout http://www.djangoproject.com/ or http://turbogears.org/ for web 
> development.

You forgot www.pylonshq.com - but indeed, Pylons may not be for newbies 
(and anyway, turbogears 2.0 will be based on it...)


From erik at myemma.com  Wed Sep 26 16:43:46 2007
From: erik at myemma.com (Erik Jones)
Date: Wed, 26 Sep 2007 15:43:46 -0500
Subject: Delete values from a string using the index
In-Reply-To: <1190838311.630506.64670@y42g2000hsy.googlegroups.com>
References: <1190838311.630506.64670@y42g2000hsy.googlegroups.com>
Message-ID: <4CAC0ABD-0774-4386-8FFF-676399C45988@myemma.com>

On Sep 26, 2007, at 3:25 PM, koutoo at hotmail.com wrote:

> How do I delete or remove values from a list or string using the
> index.
>
> If a = [1,2,3,4,5,6,7,8] and I want to get rid of 1 -5, how would I do
> that?
>
> Thanks.
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list

 >>> l = [1, 2, 3]
 >>> del l[1]
 >>> l
[1, 3]

Erik Jones

Software Developer | Emma?
erik at myemma.com
800.595.4401 or 615.292.5888
615.292.0777 (fax)

Emma helps organizations everywhere communicate & market in style.
Visit us online at http://www.myemma.com




From planetmatt at gmail.com  Wed Sep  5 08:26:35 2007
From: planetmatt at gmail.com (planetmatt)
Date: Wed, 05 Sep 2007 12:26:35 -0000
Subject: Looping through File Question
In-Reply-To: <1188992047.858695.174790@r34g2000hsd.googlegroups.com>
References: <1188989934.436165.213680@w3g2000hsg.googlegroups.com>
	<1188992047.858695.174790@r34g2000hsd.googlegroups.com>
Message-ID: <1188995195.932117.111440@k79g2000hse.googlegroups.com>

On 5 Sep, 12:34, John Machin <sjmac... at lexicon.net> wrote:
> On Sep 5, 8:58 pm, planetmatt <planetm... at gmail.com> wrote:
>
> > I am a Python beginner.  I am trying to loop through a CSV file which
> > I can do.  What I want to change though is for the loop to start at
> > row 2 in the file thus excluding column headers.
>
> > At present I am using this statement to initiate a loop though the
> > records:
>
> > for line in f.readlines():
>
> > How do I start this at row 2?
>
> The quick answer to your literal question is:
>   for line in f.readlines()[1:]:
> or, with extreme loss of elegance, this:
>   for lino, line in enumerate(f.readlines()):
>       if not lino:
>           continue
>
> But readline and readlines are old hat, and you wouldn't want to read
> a file of a few million lines into a big list, so a better answer is:
>
>     _unused = f.next()
>     for line in f:
>
> But you did say you were reading a CSV file, and you don't really want
> to do your own CSV parsing, even if you think you know how to get it
> right, so best is:
>
>     import csv
>     rdr = csv.reader(f)
>     heading_row = rdr.next()
>     for data_row in rdr:
>
> HTH,
> John

Thanks so much for the quick response.  All working now.

I had looked at the CSV module but when I ran into another problem of
trying to loop through all columns, I was given a solution in another
forum which used the readlines() method.

I have looked at the CSV documentation but didn't see any mention of
heading_row or data_row.  Is there a definitive Python documentation
site with code examples like MS's MSDN?




From python-url at phaseit.net  Mon Sep  3 14:28:48 2007
From: python-url at phaseit.net (Gabriel Genellina)
Date: Mon, 3 Sep 2007 18:28:48 +0000 (UTC)
Subject: Python-URL! - weekly Python news and links (Sep  3)
Message-ID: <fbhjp0$k7r$1@lairds.us>

QOTW:  "If there were a protein that could only be folded by proving the
Riemann Hypothesis, the gene that coded for it would quickly get weeded
out of the gene pool." - Scott Aaaronson
    http://scottaaronson.com/blog/?p=266

"We read Knuth so you don't have to." - Tim Peters

    
    The first Python 3000 release is out -- Python 3.0a1.
    Anouncement by Guido van Rossum:
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/267a7b9f3619022b/d7ff1cf24fd44510
    Download it:     http://python.org/download/releases/3.0/
    
    The first Python Unconference is under two weeks away:
	 http://pycamp.python.org/Texas/

    Using set operations instead of list.index(), why there is
    no list.find(), and the right way to pronounce "troll".
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/6edd7c3363cf2834/262d7a0affcba78e
    
    Analyzing a very slow Python code (loops, xrange and
    integer arithmetic only)
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/94fade7f69fd9d6/5ab70849893ecfc2
    
    Free memory, garbage collection, and the reuse of integer objects.
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/6b3f78fe88686940/fe19a8ccfcf6272d
    
    An old PEP on Programming by Contract revisited
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/fecfac3549230a0b/67b8a02147e22143
    
    Started about client/server applications, then people
    comment about their favorite architectures.
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/273797276173ea97/b1e2d8f0ff7871e4
    
    Using fcntl to syncronize file access by two processes
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/c09abd7272f739ff/2b44e4382cd30a1b
    
    The difference between os.getenv/os.putenv and os.environ[]
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/60a59bbf8207aeb0/4e9e51c84dc7a01f

    Python sort-of joins the 21st century of Web 2.0, and video, and
    ... well, the technical point is that Django's a solution liked
    by many:
	 http://groups.google.com/group/comp.lang.python/msg/79e2137000b89417
    

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

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

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

    Just beginning with Python?  This page is a great place to start:
	http://wiki.python.org/moin/BeginnersGuide/Programmers

    The Python Papers aims to publish "the efforts of Python enthusiats":
	http://pythonpapers.org/
    The Python Magazine is a technical monthly devoted to Python:
	http://pythonmagazine.com

    Readers have recommended the "Planet" sites:
	http://planetpython.org
	http://planet.python.org

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

    Python411 indexes "podcasts ... to help people learn Python ..."
    Updates appear more-than-weekly:
        http://www.awaretek.com/python/index.html

    Steve Bethard continues the marvelous tradition early borne by
    Andrew Kuchling, Michael Hudson, Brett Cannon, Tony Meyer, and Tim
    Lesher of intelligently summarizing action on the python-dev mailing
    list once every other week.
	http://www.python.org/dev/summary/

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

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

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

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

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

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch

    Although unmaintained since 2002, the Cetus collection of Python
    hyperlinks retains a few gems.
        http://www.cetus-links.org/oo_python.html

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

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

    Many Python conferences around the world are in preparation.
    Watch this space for links to them.

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
	http://www.python.org/dev/peps/pep-0042/

    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

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

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

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

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


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

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


-- The Python-URL! Team--

Phaseit, Inc. (http://phaseit.net) is pleased to participate in and
sponsor the "Python-URL!" project.  Watch this space for upcoming
news about posting archives.


From tdelaney at avaya.com  Tue Sep 25 00:45:48 2007
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Tue, 25 Sep 2007 12:45:48 +0800
Subject: Almost There - os.kill()
In-Reply-To: <E4C7BCAB1872014F81CEAACD25699B8C0849AA@301081ANEX2.global.avaya.com>
Message-ID: <E4C7BCAB1872014F81CEAACD25699B8C0849B3@301081ANEX2.global.avaya.com>

Delaney, Timothy (Tim) wrote:

> Nope - pretty sure that an earlier version of Python defaulted to a
> radix of 0, but it appears to default to a radix of 10 in Python 2.5.
> 
> In any case, I've submitted a bug report and suggested new text for
> the documentation of int() to make it clear what happens when a radix
> is not specified.

Hmm - looks like I must have been misremembering from another language -
it appears Python always used a default radix of 10.

Anyway, the docs have been updated.

Tim Delaney


From xah at xahlee.org  Mon Sep 10 09:15:01 2007
From: xah at xahlee.org (Xah Lee)
Date: Mon, 10 Sep 2007 06:15:01 -0700
Subject: general function for sorting a matrix
In-Reply-To: <5jllseF6oarU1@mid.uni-berlin.de>
References: <1188402447.290663.307640@z24g2000prh.googlegroups.com>
	<5jllseF6oarU1@mid.uni-berlin.de>
Message-ID: <1189430101.043811.3060@57g2000hsv.googlegroups.com>

hi, just a quick reply.

You are right, the python version i have is really terrible.

I'll look at your solution and possibly reply later.

Thanks for your code. It's great!

 Xah

On Aug 29, 9:40 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Wed, 29 Aug 2007 08:47:27 -0700,XahLeewrote:
> > While reviewing this code, there's something interesting of note.
>
> > Namely, in my perl solution, the approach is drastically different
> > than the python version. Instead ofsortingby looping thru the
> >sortingdirectives, it parses the directives then generate the
> > complete sort code, then eval it in one shot. This is more of a pure
> > functional approach.
>
> I don't see why that is more functional.  After all you iterate in both
> versions through the directives.  In Perl to build the code, in Python to
> sort the list multiple times.  Here's a Python function that sorts the
> list just once:
>
> def sort_matrix(matrix, directives):
>     tmp = [(column - 1, str if as_string else float, 1 if ascending else -1)
>            for (column, as_string, ascending) in directives]
>
>     def cmp_func(row_a, row_b):
>         for column, convert_func, factor in tmp:
>             result = cmp(convert_func(row_a[column]),
>                          convert_func(row_b[column])) * factor
>             if result:
>                 return result
>         return 0
>
>     matrix.sort(cmp=cmp_func)
>
> There's no return value as your reference implementation sorts in place
> too.
>
> Ciao,
>         Marc 'BlackJack' Rintsch




From mail at timgolden.me.uk  Tue Sep 11 10:52:19 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Tue, 11 Sep 2007 15:52:19 +0100
Subject: shared memory pointer
In-Reply-To: <1189520483.489744.106960@19g2000hsx.googlegroups.com>
References: <1189436265.841415.234050@w3g2000hsg.googlegroups.com>	<mailman.325.1189437043.2658.python-list@python.org>	<1189437684.476993.130390@g4g2000hsf.googlegroups.com>	<mailman.384.1189515477.2658.python-list@python.org>
	<1189520483.489744.106960@19g2000hsx.googlegroups.com>
Message-ID: <46E6ABA3.1080203@timgolden.me.uk>

Tim wrote:
> I think I want to stay away from mmap because it uses the disk to
> store my memory. 

My point is that, whatever mmap is doing, your own code
is doing *exactly the same thing*. Passing the
INVALID_HANDLE_VALUE as both your code and the mmap
code are doing is documented as producing an area of
memory backed by the page file (which, let's face it,
is what all of your memory is backed by). Whether that's
good enough for you or not I don't know, but you're not
going to get any better with *this* technique :)

[... snip explanation of C++ simulator and Python charting ...]

OK, so your C++ stuff dumps to memory. Using CreateFileMapping
and MapViewOfFile? Or some other kind of global memory?

In short, if your C++ can write stuff out to shared memory
created using CreateFileMapping/MapViewOfFile with a first
param of INVALID_HANDLE_VALUE and a tag name, you can use
Python's mmap with the equivalent values and tag name to
access that data. Straightforward.

If, on the other hand, your C++ is writing to arbitrary
global memory, I don't think it's going to fly. You could
also use named pipes, by the way, and possibly other
Windows synching mechanisms. (He says, muddying the waters
horribly).

TJG


From steve at holdenweb.com  Wed Sep 26 13:41:59 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 26 Sep 2007 13:41:59 -0400
Subject: regex with specific list of string
In-Reply-To: <1190827835.3397.76.camel@dot.uniqsys.com>
References: <1190821357.753909.178210@50g2000hsm.googlegroups.com>	<fde2i4$9k1$1@sea.gmane.org>
	<1190827835.3397.76.camel@dot.uniqsys.com>
Message-ID: <fde5l5$mld$1@sea.gmane.org>

Carsten Haese wrote:
> On Wed, 2007-09-26 at 12:49 -0400, Steve Holden wrote:
>> james_027 wrote:
>>> hi,
>>>
>>> how do I regex that could check on any of the value that match any one
>>> of these ... 'jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug',
>>> 'sep', 'oct', 'nov', 'dec'
>>>
>>> Thanks
>>  >>> patr = re.compile('jan|feb|mar|apr|may|jun|jul|aug|sep|nov|oct|dec')
>>  >>> patr.match("jul")
>> <_sre.SRE_Match object at 0x7ff28ad8>
>>  >>> patr.match("nosuch")
> 
> Unfortunately, that also matches margarine, mayonnaise, and octopus,
> just to name a few ;-)
> 
Indeed, but I think the essential point was served. Unlike the 
mayonnaise and octopus.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From rrr at ronadam.com  Sun Sep 23 04:55:45 2007
From: rrr at ronadam.com (Ron Adam)
Date: Sun, 23 Sep 2007 03:55:45 -0500
Subject: Factory function with keyword arguments
In-Reply-To: <13fbl9ertj5es12@corp.supernews.com>
References: <13fbl9ertj5es12@corp.supernews.com>
Message-ID: <46F62A11.7010002@ronadam.com>



Steven D'Aprano wrote:
> I'm writing a factory function that needs to use keywords in the produced 
> function, not the factory. Here's a toy example:


> I thought of doing this:
> 
> def factory(flag):
>     if flag: kw = 'spam'
>     else: kw = 'ham'
>     def foo(obj, arg):
>         kwargs = dict([(kw, arg)])
>         return obj.method(**kwargs)
>     return foo
> 
> Is this the best way of doing this? Are there any alternative methods 
> that aren't risky, slow or obfuscated?

Looks ok to me.  It can be simplified a bit.

    def factory(flag):
        kw = 'spam' if flag else 'ham'
        def foo(obj, arg):
            return obj.method(**{kw:arg})
        return foo


Cheers,
    Ron



From steve at holdenweb.com  Tue Sep 18 11:48:23 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 18 Sep 2007 11:48:23 -0400
Subject: Saving parameters between Python applications?
In-Reply-To: <1190122569.509673.41420@57g2000hsv.googlegroups.com>
References: <1189969538.830532.98840@g4g2000hsf.googlegroups.com>	<fcm036$cp8$1@news2.u-psud.fr>	<1190060967.696332.113190@n39g2000hsh.googlegroups.com>
	<1190122569.509673.41420@57g2000hsv.googlegroups.com>
Message-ID: <fcos05$4dj$1@sea.gmane.org>

Stodge wrote:
> os.path.expanduser isn't an option; I need each console/window to
> maintain different values which I wouldn't get from saving to a user's
> home directory. Unless I used a different file for each console/window
> but that just gets me into the same situation I'm already in. I think
> the only option is to set environment variables using another script.
> I'm really surprised and disapponited by this.
> 
That's a sign of your inexperience, then. As someone has already pointed 
out, this is nothing to do with Python.

Under UNIX/Linux you could use the $$ variable to construct a filename 
specific to a particular shell process and put it in the environment, 
but I'm not aware of a similar feature in Windows. This is probably a 
sign of *my* inexperience :-)

> One option I thought of but haven't investigated, is the ability to
> get the parent (i.e. console's) process id and use that to create a
> file somewhere. Not sure if this is even possible.
> 
You might be able to write a Python program to access it :-)

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From ron.longo at cox.net  Thu Sep 27 17:28:44 2007
From: ron.longo at cox.net (Ron Provost)
Date: Thu, 27 Sep 2007 17:28:44 -0400
Subject: Creating Table using Tkinter
References: <1190918535.924299.22750@k79g2000hse.googlegroups.com>
Message-ID: <008001c8014d$629ee830$6701a8c0@aristotle>

Ankit,

Have you tried the HList (or one of the descendant widgets) in Tix?  The Tix 
library includes quite a few additional widgets and it's part of the 
standard python distribution.

Ron
----- Original Message ----- 
From: "Ankit" <ankitanand1986 at gmail.com>
Newsgroups: comp.lang.python
To: <python-list at python.org>
Sent: Thursday, September 27, 2007 2:42 PM
Subject: Creating Table using Tkinter


> Hi guys i need to make a table to store a certain data using
> Tkinter..I have searched on the group but i have not been able to find
> a solution that would work for me..The thing is that i want my table
> to be scrollable both horizontally and vertically and i also want to
> transmit the data from the table serially to a microcontroller so i
> also need to make sure that i am able to read all the data
> individually..I am writing my code on Windows..my table is dynamic
> that is the number of columns are fixed but the number of rows can
> vary that would depend on the user..Initially i ask him about the
> number of rows...Waiting for your replies..
>
> Regards
> Ankit Anand
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list 



From cool.gaurav.ignition at gmail.com  Sun Sep 30 00:20:10 2007
From: cool.gaurav.ignition at gmail.com (Googy)
Date: Sat, 29 Sep 2007 21:20:10 -0700
Subject: New to python
Message-ID: <1191126010.260942.89230@y42g2000hsy.googlegroups.com>

I am new to python...

The programming language i know well is C
Can any one recommend me the good ebook for beginners. I have loads of
ebooks but i am not able to decide which to start with which book.
Also i am learning XML so later on i can switch to books on Python and
XML but initially which book to read??

Please help...



From arkanes at gmail.com  Thu Sep 20 13:12:30 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 20 Sep 2007 12:12:30 -0500
Subject: Sets in Python
In-Reply-To: <1190286192.103681.235270@w3g2000hsg.googlegroups.com>
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
	<CeB*qHeVr@news.chiark.greenend.org.uk>
	<1190235483.412972.81280@v23g2000prn.googlegroups.com>
	<_cmIi.3452$ZA5.919@nlpi068.nbdc.sbc.com>
	<1190286192.103681.235270@w3g2000hsg.googlegroups.com>
Message-ID: <4866bea60709201012x30fc0285j9c07dda2a1991d16@mail.gmail.com>

On 9/20/07, Dustan <DustanGroups at gmail.com> wrote:
> On Sep 19, 10:58 pm, Bryan Olson <fakeaddr... at nowhere.org> wrote:
> > Bad news: Python 3000 has no immutable type for byte-strings.
> > The new bytes type cannot serve for dict keys or set members.
> > Many things one would want to hash are unhashable -- for
> > example, the results of the hash functions in hashlib.
>
> Are you serious????
>

It's a little Chicken Little. The current version of py3k has no
immutable bytes type, but there's work being done even as we speak to
implement it.


From m.n.summerfield at googlemail.com  Thu Sep 27 04:13:21 2007
From: m.n.summerfield at googlemail.com (Mark Summerfield)
Date: Thu, 27 Sep 2007 08:13:21 -0000
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <Xns99B85636C2565duncanbooth@127.0.0.1>
References: <1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>
	<1190753722.026806.254530@d55g2000hsg.googlegroups.com>
	<1190756003.292096.71130@o80g2000hse.googlegroups.com>
	<1190789981.385466.37870@57g2000hsv.googlegroups.com>
	<Xns99B760A3F5859duncanbooth@127.0.0.1>
	<1190805297.182232.116830@50g2000hsm.googlegroups.com>
	<Xns99B7957CCE43Fduncanbooth@127.0.0.1>
	<1190815180.945099.248670@n39g2000hsh.googlegroups.com>
	<1190816657.574437.80980@g4g2000hsf.googlegroups.com>
	<1190820026.299569.110250@n39g2000hsh.googlegroups.com>
	<Xns99B7DE66C56F6duncanbooth@127.0.0.1>
	<1190846656.770087.173230@19g2000hsx.googlegroups.com>
	<Xns99B85636C2565duncanbooth@127.0.0.1>
Message-ID: <1190880801.795820.275070@50g2000hsm.googlegroups.com>

On 27 Sep, 08:32, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> Paul Hankin <paul.han... at gmail.com> wrote:
> >> A key which is in dict must be either in __keycache or in __addkeys, but
> >> never in both.
>
> > Yes, I'm sorry: you're right.
>
> > But there's a different bug: if you delete a key that's not in the
> > dict, you'll add it to the deleted list before the exception for the
> > missing key is raised.
>
> > sd = sorteddict.sorteddict()
> > sd['a'] = 'a'
> > print sd.keys() = ['a']
> > try:
> >     del sd['b']
> > except:
> >     pass
> > sd['b'] = 'b'
> > print sd.keys()
>
> > The second print statement produces ['a'] rather than ['a', 'b']
>
> Yes, I think there are probably several cases where I need to account for
> exceptions.
>
> There's another serious problem: if Mark wants this module to be used and
> stand any chance at all of eventually being incorporated into the standard
> library, then he will have to change the license on his code: the GPL
> simply isn't an option here.

I have fixed __addkey() and __removekey():

    def __addkey(self, key):
        if key in self.__delkeys:
            self.__delkeys.remove(key)
        else:
            self.__addkeys.add(key)


    def __removekey(self, key):
        if key in self.__addkeys:
            self.__addkeys.remove(key)
        else:
            self.__delkeys.add(key)

I have also fixed __delitem__():

        try:
            dict.__delitem__(self, key)
        except KeyError:
            raise
        else:
            self.__removekey(key)

As for the license, while it is on PyPI, I'll leave it as GPL v 3. If
it was wanted for the standard library (and I can't see that ever
happening), I will happily change it to the one that is preferred for
Python modules.



From Summercoolness at gmail.com  Sun Sep 30 12:49:49 2007
From: Summercoolness at gmail.com (Summercool)
Date: Sun, 30 Sep 2007 16:49:49 -0000
Subject: which language allows you to change an argument's value?
In-Reply-To: <f891e9884d1151a8d46e8be15e43b788@ruby-forum.com>
References: <1191149233.346818.246170@22g2000hsm.googlegroups.com>
	<f891e9884d1151a8d46e8be15e43b788@ruby-forum.com>
Message-ID: <1191170989.227928.252880@g4g2000hsf.googlegroups.com>

On Sep 30, 4:18 am, 7stud -- <dol... at excite.com> wrote:
> SpringFlowers AutumnMoon wrote:
> > we have no way
> > of knowing what we pass in could get changed.
>
> Sure you do.  You look at the function's signature.  In order to use
> someone else's library, you have to know the function's signature.  And
> the signature explicitly tells you whether the value you pass in could
> be changed.

do you mean in C++?  I tried to find signature in two C++ books and it
is not there.  Google has a few results but it looks something like
prototype.  Is signature the same as the function prototype in the .h
file?  If so, don't we usually just include <___.h> and forget about
the rest.  Documentation is fine although in some situation, the
descriptions is 2 lines, and notes and warnings are 4, 5 times that,
and the users' discussing it, holding different opinion is again 2, 3
times of that length.  I think in Pascal and C, we can never have an
argument modified unless we explicitly allow it, by passing in the
pointer (address) of the argument.

also i think for string, it is a bit different because by default,
string is a pointer to char or the address of the first char in C and C
++.  So it is like passing in the address already.  it is when the
argument n is something like 1 that makes me wonder.




From gagsl-py2 at yahoo.com.ar  Mon Sep  3 20:17:00 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 03 Sep 2007 21:17:00 -0300
Subject: SOAP : ZSI error
References: <46DBD73F.6060003@gmail.com>
Message-ID: <op.tx3semonx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 03 Sep 2007 06:43:27 -0300, linuxprog <linuxprog at gmail.com>  
escribi?:

> import IDutchservice_services
> soap =
> IDutchservice_services.IDutchbindingSOAP("www.ebob42.com/cgi-bin/NumberToWordsInDutch.exe/soap/IDutch")
> ok = IDutchservice_services.NumToStr0Request()
> ok.Num=5
> print soap.NumToStr(ok)
>
> that prints an error RuntimeError: must specify transport or url
> startswith https/http
>
> what's wrong in my script ? thanks

Just a guess based on the error message, try using:

IDutchservice_services.IDutchbindingSOAP("http://www.ebob42.com/cgi-bin/...)


-- 
Gabriel Genellina



From daniel.j.larsson at gmail.com  Wed Sep  5 06:42:13 2007
From: daniel.j.larsson at gmail.com (Daniel Larsson)
Date: Wed, 5 Sep 2007 12:42:13 +0200
Subject: decorator and signal handler
In-Reply-To: <1188985182.617611.121740@r29g2000hsg.googlegroups.com>
References: <1188985182.617611.121740@r29g2000hsg.googlegroups.com>
Message-ID: <2bfa72fa0709050342v24a4f057hf5ae289ccb189c16@mail.gmail.com>

On 9/5/07, stalex <shao.tu at gmail.com> wrote:
>
> Hi all,
>
> I wrote the following code since I want to try using a decorator to
> install signal handler:
>
> ## The test.py script
> #################
> import os
> import time
> import signal
>
> def sigHandler(sid):
>     def handler(f):
>         signal.signal(sid, f)
>         return f
>     return handler
>
> class Test(object):
>     @sigHandler(signal.SIGTERM)
>     def _sigHandler(self, signalId, currentFrame):
>         print "Received:", signalId
>
> if __name__ == "__main__":
>     print "pid:", os.getpid()
>
>     t = Test()
>     time.sleep(300)
>
> # From terminal, say A
> ####################
> $ python test.py
> pid: 1234
>
> # From terminal, say B
> ###################
> $ kill -TERM 1234
>
> After issuing the kill command from terminal B, the process of test.py
> from terminal A is terminated.
> Python print out some exception message as following:
> Traceback (most recent call last):
>     File "a.py", line 22, in <module>
>         time.sleep(300)
> TypeError: _sigHandler() takes exactly 3 arguments (2 given)
>
> At a guess, I think the decorator I defined did not pass the 'self' as
> the first argument to _sigHandler() method, did it? And I have no idea
> of how to write a correct one. Any suggestion?


You can't call an unbound method without supplying the instance explicitly.

Try decorate a global function instead, and it should work.

--
> http://mail.python.org/mailman/listinfo/python-list
>
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From koutoo at hotmail.com  Thu Sep 20 15:19:17 2007
From: koutoo at hotmail.com (koutoo at hotmail.com)
Date: Thu, 20 Sep 2007 12:19:17 -0700
Subject: Lookup values from one table to another based on a value
In-Reply-To: <46f2a4e6$0$15456$426a74cc@news.free.fr>
References: <1190298876.689060.44540@d55g2000hsg.googlegroups.com>
	<46f2930a$0$9505$426a74cc@news.free.fr>
	<1190305331.584560.218880@g4g2000hsf.googlegroups.com>
	<46f2a4e6$0$15456$426a74cc@news.free.fr>
Message-ID: <1190315957.295875.34220@n39g2000hsh.googlegroups.com>

On Sep 20, 11:51 am, Bruno Desthuilliers <bruno.
42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> kou... at hotmail.com a ?crit :
>
> > On Sep 20, 10:34 am, Bruno Desthuilliers <bruno.
> > 42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> >> kou... at hotmail.com a ?crit :
> (snip)
> >>> Normally in Access I would just use a Dlookup and be done with it, or
> >>> use a Recordset in VB.  Thanks guys.
> >> What about using a database ? Like SQLite ?
>
> > Ah, yes, that would appear to be a better means to retrieve data.  I
> > visited the site, which version should I download?  Thanks.
>
> The latest, unless you have reasons to choose an old one !-)


If I flipped the Table being looked up not to repeat, would that make
things easier to look up a value in?

Exp:

Table1

Site = 103
Lane = 1
Direction = ?
FHWA Lane = ?

Table2

Site, Lane 1, Direction 1, FHWA Lane 1,
103, 1, 1, 1



From duncan.booth at invalid.invalid  Fri Sep  7 04:07:25 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 7 Sep 2007 08:07:25 GMT
Subject: startswith( prefix[, start[, end]]) Query
References: <1189087752.538726.101350@r29g2000hsg.googlegroups.com>
	<46e00d7e$0$16413$426a74cc@news.free.fr>
	<mailman.156.1189092591.2658.python-list@python.org>
Message-ID: <Xns99A45CD3825D7duncanbooth@127.0.0.1>

"Tim Williams" <listserver at tdw.net> wrote:

> Isn't slicing still faster than startswith?    As you mention timeit,
> then you should probably add slicing to the pot too :)
> 

Possibly, but there are so many other factors that affect the timing 
that writing it clearly should be your first choice.

Some timings:

@echo off
setlocal
cd \python25\lib
echo "startswith"
..\python timeit.py -s "s='abracadabra1'*1000;t='abracadabra2'" s.startswith(t)
..\python timeit.py -s "s='abracadabra1'*1000;t='abracadabra1'" s.startswith(t)
echo "prebound startswith"
..\python timeit.py -s "s='abracadabra1'*1000;t='abracadabra2';startswith=s.startswith" startswith(t)
..\python timeit.py -s "s='abracadabra1'*1000;t='abracadabra1';startswith=s.startswith" startswith(t)
echo "slice with len"
..\python timeit.py -s "s='abracadabra1'*1000;t='abracadabra2'" s[:len(t)]==t
..\python timeit.py -s "s='abracadabra1'*1000;t='abracadabra1'" s[:len(t)]==t
echo "slice with magic number"
..\python timeit.py -s "s='abracadabra1'*1000;t='abracadabra2'" s[:12]==t
..\python timeit.py -s "s='abracadabra1'*1000;t='abracadabra1'" s[:12]==t

and typical output from this is:

"startswith"
1000000 loops, best of 3: 0.542 usec per loop
1000000 loops, best of 3: 0.514 usec per loop
"prebound startswith"
1000000 loops, best of 3: 0.472 usec per loop
1000000 loops, best of 3: 0.474 usec per loop
"slice with len"
1000000 loops, best of 3: 0.501 usec per loop
1000000 loops, best of 3: 0.456 usec per loop
"slice with magic number"
1000000 loops, best of 3: 0.34 usec per loop
1000000 loops, best of 3: 0.315 usec per loop

So for these particular strings, the naive slice wins if the comparison is 
true, but loses to the pre-bound method if the comparison fails. The slice is 
taking a hit from calling len every time, so pre-calculating the length
(which should be possible in the same situations as pre-binding startswith)
might be worthwhile, but I would still favour using startswith unless I knew
the code was time critical.


From travelingwebs1 at gmail.com  Sun Sep 23 15:35:14 2007
From: travelingwebs1 at gmail.com (travelingwebs1 at gmail.com)
Date: Sun, 23 Sep 2007 12:35:14 -0700
Subject: Travel around the globe...
Message-ID: <1190576114.537338.298990@w3g2000hsg.googlegroups.com>

http://world-traveling-destinations.blogspot.com/



From frikimaster at gmail.com  Tue Sep 11 15:16:04 2007
From: frikimaster at gmail.com (Antoni Villalonga)
Date: Tue, 11 Sep 2007 21:16:04 +0200
Subject: urllib2: handle an error (302)
In-Reply-To: <20070911135641.GB3614@gmail.com>
References: <75eeb70e0709102158m2388e4h5988b0d6433f3bb3@mail.gmail.com>
	<20070911135641.GB3614@gmail.com>
Message-ID: <75eeb70e0709111216s64c6159dr8780ec12497bf745@mail.gmail.com>

2007/9/11, O.R.Senthil Kumaran:
> > When urllib2 libs visit a URL with 302 error follow the location
> > automatically. I need to get the location  in order to get the full
> > URL (not relative URL) parsing html code.
>
> urllib2 automatically handles the 302 redirection. What you get as the end result is the 'redirected' page.
> - If all you want is the 'redirected' page. Blindly use urllib2, it handles it.
> - If you want a 'smarter' way of handling redirection, then you might have to extend the HTTPRedirectHandler.
>
> A very good example is provided by Mark Pilgrim in his 'Dive Into Python'.
> Have a look here:
> http://www.diveintopython.org/http_web_services/index.html
>
> Example 11.1 openanything.py
>
>
> Implement your program along those lines.
>
> Thanks,
> Senthil

Tnks It works!!

-- 
"Boring two-person multiplayer may turn friends into enemies."

Antoni Villalonga i Noceras
#Bloc# ~> http://friki.CAT
#Jabber# ~> friki at bulmalug.net


From zentraders at gmail.com  Mon Sep 24 16:19:14 2007
From: zentraders at gmail.com (Zentrader)
Date: Mon, 24 Sep 2007 13:19:14 -0700
Subject: Nested For and While Statements
In-Reply-To: <1190664644.936871.57050@57g2000hsv.googlegroups.com>
References: <1190662087.403000.16290@g4g2000hsf.googlegroups.com>
	<fd94av$fj8$1@daisy.noc.ucla.edu>
	<1190664644.936871.57050@57g2000hsv.googlegroups.com>
Message-ID: <1190665154.788961.87010@n39g2000hsh.googlegroups.com>

In addition, "for" is lower case, i.e not "For".  If this doesn't
solve the problem then please post the actual error message. "Next
Line hits snag here?  Where should this line be?" is not specific
enough.



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Sep 26 04:03:03 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 26 Sep 2007 10:03:03 +0200
Subject: Zope review
In-Reply-To: <mailman.1064.1190752984.2658.python-list@python.org>
References: <1190331847.514475.284200@22g2000hsm.googlegroups.com>	<1190403772.862325.113960@y42g2000hsy.googlegroups.com>	<mailman.901.1190415882.2658.python-list@python.org>	<1190432460.360614.293400@n39g2000hsh.googlegroups.com>	<54e1e4bc0709220757r5609f19brabadc43f34ae90d8@mail.gmail.com>
	<mailman.1064.1190752984.2658.python-list@python.org>
Message-ID: <46fa1218$0$26004$426a74cc@news.free.fr>

Egon Frerich a ?crit :

> Zope 3 uses Twisted

Chapter and verse ???



From alberto.griggio at gmail.com  Thu Sep  6 05:21:41 2007
From: alberto.griggio at gmail.com (Alberto Griggio)
Date: Thu, 06 Sep 2007 11:21:41 +0200
Subject: Text processing and file creation
References: <1189008809.718361.45790@g4g2000hsf.googlegroups.com>
	<1189024097.175349.221210@w3g2000hsg.googlegroups.com>
	<1189027060.889829.282510@r34g2000hsd.googlegroups.com>
Message-ID: <fbogn0$3bh$1@sea.gmane.org>

> Thanks for making me aware of the (UNIX) split command (split -l 5
> inFile.txt), it's short, it's fast, it's beautiful.
> 
> I am still wondering how to do this efficiently in Python (being kind
> of new to it... and it's not for homework).

Something like this should do the job:

def nlines(num, fileobj):
    done = [False]
    def doit():
        for i in xrange(num):
            l = fileobj.readline()
            if not l:
                done[0] = True
                return
            yield l
    while not done[0]:
        yield doit()

for i, group in enumerate(nlines(5, open('bigfile.txt'))):
    out = open('chunk_%d.txt' % i)
    for line in group:
        out.write(line)


> I am still wondering how to do this in Python (being new to Python)

This is just one way of doing it, but not as concise as using split...

Alberto




From arvind1.singh at gmail.com  Sat Sep 22 11:24:45 2007
From: arvind1.singh at gmail.com (Arvind Singh)
Date: Sat, 22 Sep 2007 20:54:45 +0530
Subject: Killing A Process By PID
In-Reply-To: <E687AE52-6F72-4374-9662-84044B403210@jedimindworks.com>
References: <5970333469768353093@unknownmsgid>
	<c19402930709201946qc8828f7h3725b4dd8c4b3823@mail.gmail.com>
	<E687AE52-6F72-4374-9662-84044B403210@jedimindworks.com>
Message-ID: <c19402930709220824p97703ds7cf0c39219f751ba@mail.gmail.com>

> file('/var/lock/Application.lock', 'w').write(str(os.getpid()))
> >
> >  Which to be honest appears to run just fine, when I look in that file
> > it always contains the correct process ID, for instance, 3419 or something
> > like that.
> >
> I honestly doubt that. The I/O is buffered and you need to flush()/close()
> the file. Otherwise data may not get written until python interpreter exits.
>
>
> Isn't the file closed after the file().write()?  Seems to me that the
> great garbage collector in the sky will happily flush(), close() and forget
> it ever happened...
>

Yes, the GC will flush()/close() the file properly. My mistake, sorry about
that.

-- 
Regards,
Arvind
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From gagsl-py2 at yahoo.com.ar  Fri Sep 21 02:58:26 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 21 Sep 2007 03:58:26 -0300
Subject: Processing drag & drop on the desktop
References: <1189961614.510561.194610@w3g2000hsg.googlegroups.com>
	<1uSdnaNGwMvgBXPbnZ2dnUVZ_tjinZ2d@comcast.com>
	<1190181749.502414.195730@r29g2000hsg.googlegroups.com>
Message-ID: <op.tyzsboe7x6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 19 Sep 2007 03:02:29 -0300, Pierre Quentel  
<quentel.pierre at wanadoo.fr> escribi?:

> then put a shortcut to this script on the desktop
>
> When I drop a file on the shortcut, nothing happens (when I double-
> click on the shorcut, a console window opens and sys.argv is actually
> stored in the file)
>
> Am I missing something ?

The shortcut must point to a *program*, not a *document*.
Change the "shortcut destination" to point to:
c:\path\to\python c:\path\to\your\script.py

-- 
Gabriel Genellina



From http  Sat Sep  8 12:53:44 2007
From: http (Paul Rubin)
Date: 08 Sep 2007 09:53:44 -0700
Subject: creating really big lists
References: <874pi92tr4.fsf@mulj.homelinux.net>
	<mailman.121.1189035929.2658.python-list@python.org>
	<1189057626.943757.210420@d55g2000hsg.googlegroups.com>
	<1189063849.118900.327540@22g2000hsm.googlegroups.com>
	<1189192606.119578.100820@r34g2000hsd.googlegroups.com>
	<mailman.263.1189215250.2658.python-list@python.org>
	<1189267181.964313.302520@g4g2000hsf.googlegroups.com>
Message-ID: <7x7in1rtd3.fsf@ruckus.brouhaha.com>

Dr Mephesto <dnhkng at googlemail.com> writes:
> well, I want to (maybe) have a dictionary where the value is a list of
> 5 lists. And I want to add a LOT of data to these lists. 10?s of
> millions of pieces of data. Will this be a big problem? I can just try
> it out in practice on monday too :)

Yes, that may be a problem both because of the amount of memory
required, and because of how the GC works.  You may want to turn off
the GC while building these list.  Otherwise, think of some other
strategy, like files on disk.


From alexandre.badez at gmail.com  Wed Sep  5 08:22:36 2007
From: alexandre.badez at gmail.com (Alexandre Badez)
Date: Wed, 05 Sep 2007 12:22:36 -0000
Subject: Multi Heritage with slots
In-Reply-To: <op.tx6f02mvwepdt4@ericb.pragmadev>
References: <1188982916.071976.160170@g4g2000hsf.googlegroups.com>
	<op.tx6f02mvwepdt4@ericb.pragmadev>
Message-ID: <1188994956.570845.269250@w3g2000hsg.googlegroups.com>

On Sep 5, 12:42 pm, "Eric Brunel" <see.signat... at no.spam> wrote:
> Seehttp://mail.python.org/pipermail/python-list/2006-December/418768.html
>
> Basically, the general advice you're likely to get here is: don't use
> __slots__, or at least don't use __slots__ with inheritance.
>
> BTW, what are you trying to do? Is it really a memory footprint
> optimization, which is the intended use case for __slots__, or are you
> just doing Java in Python?
> --
> python -c "print ''.join([chr(154 - ord(c)) for c in
> 'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"

Thanks for your answer.
I use __slots__ not for memory optimization nor doing java.
I use __slots__ because my class are used by other lib, and in the
past, some of them misspell some attributes and involved a very
annoying comportment of the global application.
So the objective is only to prevent unwanted dynamism (but not in all
the application, just some class).

PS: I very like your signature ;)



From claird at lairds.us  Sat Sep 15 08:20:02 2007
From: claird at lairds.us (Cameron Laird)
Date: Sat, 15 Sep 2007 12:20:02 +0000
Subject: Python+Expect+Win32 = Not Possible?
References: <1189657637.539038.317280@k79g2000hse.googlegroups.com>
	<1189672955.321701.164050@57g2000hsv.googlegroups.com>
	<1189681397.349994.126130@57g2000hsv.googlegroups.com>
Message-ID: <i8vsr4-5f3.ln1@lairds.us>

In article <1189681397.349994.126130 at 57g2000hsv.googlegroups.com>,
gamename  <namesagame-usenet at yahoo.com> wrote:
>On Sep 13, 1:42 am, half.ital... at gmail.com wrote:
>> On Sep 12, 9:27 pm, gamename <namesagame-use... at yahoo.com> wrote:
>>
>> > Hi,
>>
>> > Is it still the case there is no practical Expect-like module for
>> > win32? I know that cygwin can support pexpect, but that isn't an
>> > option here --- I have to use a native win32 Python version.
>>
>> > Are there alternatives, or is it simply not an option to replicate
>> > Expect on win32 with python?
>>
>> > All I'm trying to do is start a couple processes, wait for each to say
>> > "done" on stdout and then quit (or timeout if something went wrong).
>>
>> > TIA,
>> > -T
>>
>> I had planned on using telnet to do the same thing on windows.  I
>> don't think I ever proved it, but I'm pretty sure it will work.
>
>Thanks, Sean.  The problem is that telnet is generally disabled on
>most hosts nowadays.
			.
			.
			.
I'm plenty confused about who's saying what now.  Yes,
well-run modern hosts disable telnetd; I think the 
original description, though, was about use of telnet
to connect to hardware devices which provide some
simple TCP/IP (or serial-line?) service.  Windows 
still builds in the telnet *client* ...

... which might well be superfluous.  If these 
hardware devices (did I understand that part correctly?)
are just simple network servers, and don't, for example,
demand authentication, Python's socket library can be
used directly (and even portably!), without involvement
of Expect capabilities or an external telnet executable.


From rtw at freenet.co.uk  Wed Sep 12 17:20:49 2007
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Wed, 12 Sep 2007 16:20:49 -0500
Subject: I want py2exe not to create library.zip
References: <mailman.452.1189627963.2658.python-list@python.org>
Message-ID: <_tmdna-0DrGsxXXbnZ2dnUVZ8sjinZ2d@pipex.net>

On Wed, 12 Sep 2007 22:09:30 +0200, Laszlo Nagy wrote:

> Hi,
> 
> I want py2exe not to create library.zip. My reason is that the installed
> program will be a self updating program, and it must be able to download
> changes (newer python source files) from the server. So the files should
> not be in library.zip. I tried the --bundle option but apparently it can
> only be used to make the distribution __more__ bundled.

In your setup.py, after the call to setup(), use zipfile.ZipFile
to extract the "library.zip" into a directory called "library" then
delete the .zip.

I can't remember of the top of my head, but you may actually need
to rename the new directory to library.zip for your application
to work.

-- 
Rob.


From ptmcg at austin.rr.com  Wed Sep 19 14:36:01 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Wed, 19 Sep 2007 11:36:01 -0700
Subject: compile for ARM
In-Reply-To: <5ld5avF7ne3mU1@mid.uni-berlin.de>
References: <mailman.774.1190221806.2658.python-list@python.org>
	<5ld5avF7ne3mU1@mid.uni-berlin.de>
Message-ID: <1190226961.806875.205530@i13g2000prf.googlegroups.com>

On Sep 19, 12:41 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Rafael Marin Perez schrieb:
>
> > Hello
>
> > I'm Rafael Marin, and work as reseacher in University of Murcia (Spain).
>
> > I want to install and compile modules of python2.4 in a ARMv5b
> > architecture.
>
> > Any idea?
>
> You might consider looking at the gumstix-project. They feature a
> linux-distro including python that is used by the gumstix running a
> XScale255-controller.  That machine is ARM-based- so you might get a
> clue on how to cross-compile for that architecture by looking at the
> gumstix-stuff.
>
> Diez


The gumstix buildroot requires a Linux platform - I was able to build
Python for gumstix using a Debian environment.  The gumstix mailing
list and wiki were very helpful.

-- Paul



From sjmachin at lexicon.net  Sun Sep  9 18:43:20 2007
From: sjmachin at lexicon.net (John Machin)
Date: Sun, 09 Sep 2007 15:43:20 -0700
Subject: Modul (%) in python not like in C?
In-Reply-To: <slrnfe8rgp.66h.missive@dell.linuxdev.us.dell.com>
References: <880dece00709091201n449d4c2k31998a5d426de17d@mail.gmail.com>
	<46E4466C.2030303@sdf.lonestar.org>
	<mailman.300.1189371539.2658.python-list@python.org>
	<slrnfe8rgp.66h.missive@dell.linuxdev.us.dell.com>
Message-ID: <1189377800.482587.143060@22g2000hsm.googlegroups.com>

On Sep 10, 8:05 am, Lee Harr <miss... at frontiernet.net> wrote:
> >> Python will always yield a number x = m%n such that 0 <= x < n, but
> >> Turbo C will always yield a number such that if x = m%n -x = -m%n.  That
> >> is, since 111 % 10 = 1, -111 % 10 = -1.  The two values will always
> >> differ by n (as used above).
>
> Maybe it is an order-of-operations thing....
>
> -111 % 10 = -1
> (-111) % 10 = 9
> ?

and on the other hand, maybe it's not. Try to think of any language
where unary minus binds so loosely.




From steve at holdenweb.com  Fri Sep  7 02:41:45 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 06 Sep 2007 23:41:45 -0700
Subject: startswith( prefix[, start[, end]]) Query
In-Reply-To: <1189145398.081080.59580@r34g2000hsd.googlegroups.com>
References: <1189087752.538726.101350@r29g2000hsg.googlegroups.com>	<46e00d7e$0$16413$426a74cc@news.free.fr>
	<1189145398.081080.59580@r34g2000hsd.googlegroups.com>
Message-ID: <fbqrrb$9uf$1@sea.gmane.org>

TheFlyingDutchman wrote:
>> Else, you could as well write your own testing function:
>>
>> def str_starts_with(astring, *prefixes):
>>    startswith = astring.startswith
>>    for prefix in prefixes:
>>      if startswith(prefix):
>>        return true
>>    return false
>>
> 
> What is the reason for
>   startswith = astring.startswith
>   startswith(prefix)
> 
> instead of
>   astring.startswith(prefix)
> 
It's an optimization: the assigment creates a "bound method" (i.e. a 
method associated with a specific string instance) and avoids having to 
look up the startswith method of astring for each iteration of the inner 
loop.

Probably not really necessary, though, and they do say that premature 
optimization is the root of all evil ...

regards
Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From neilscad at hotmail.com  Fri Sep 28 21:45:08 2007
From: neilscad at hotmail.com (neil)
Date: Sat, 29 Sep 2007 13:45:08 +1200
Subject: python 2.5 and 3gb switch
Message-ID: <fdkan6$ne0$1@aioe.org>

Hello group,

I have a question I hope someone knowledgeable here might assist me with :o)

I am working on a python exporter to get a scene out of Blender and into a 
renderer called Indigo. I hope you at least have heard of open source 
Blender..
The scene is very large requiring me to use a 3gb switch enabled version of 
Blender and of course boot into a 3gb XP.
Unfortunately it seems that the limitation is now that python wont handle 
the mission I pass to it.
I am wondering if there is any build of python available that is 3gb aware? 
( if that is indeed the issue)
I see python is not really there for 64 bit yet but most of the people 
wanting to use this exporter will have 32 bit anyway.

Any assistance is appreciated
regards
Neil 




From kj7ny at nakore.com  Thu Sep 27 11:13:59 2007
From: kj7ny at nakore.com (kj7ny)
Date: Thu, 27 Sep 2007 08:13:59 -0700
Subject: How do I get the value out of a DOM Element
In-Reply-To: <46FB5B8E.8050100@web.de>
References: <1190872252.204687.286640@19g2000hsx.googlegroups.com>
	<46FB5B8E.8050100@web.de>
Message-ID: <1190906039.259425.312640@50g2000hsm.googlegroups.com>

Forgot to mention I'm using Python 2.4.3.



From carroll at nospam-tjc.com  Tue Sep 18 00:11:35 2007
From: carroll at nospam-tjc.com (Terry Carroll)
Date: Mon, 17 Sep 2007 21:11:35 -0700
Subject: (wxPython) wx.ProgressDialog - how to cancel out of?
References: <rvrme3tb8snr5rnqgf5p8g1g4ponp0nbfj@4ax.com>
	<1189898710.639012.142170@19g2000hsx.googlegroups.com>
	<1189932479.661450.13280@19g2000hsx.googlegroups.com>
Message-ID: <8sjue3p8st4shkrujlp3voq2nidasian6g@4ax.com>

Thanks to both kyosohma and 7stud for the suggestions.  I'll try
variations on the code suggested by 7stud, and follow up to the
wx-python list as kyosohma  suggested if I need more help.


From deets at nospam.web.de  Mon Sep  3 05:09:13 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 03 Sep 2007 11:09:13 +0200
Subject: Weird gcc errors while installing "MySQL-python" module
References: <1188770238.595895.288760@r29g2000hsg.googlegroups.com>
Message-ID: <5k219pF1p42tU3@mid.uni-berlin.de>

Jonas Schneider wrote:

> Hi guys,
> 
> I?m experiencing weird error messages while installing MySQL-python
> with easy_install... I have no idea where the errors come from.
> 
> Read the whole output at http://pastebin.com/m3859cf40
> It?s really a lot...
> 
> Someone got ideas?

The pastebin errormessage didn't work for me, on two different machines
actually.

Diez


From jstroud at mbi.ucla.edu  Thu Sep 20 20:46:01 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 20 Sep 2007 17:46:01 -0700
Subject: Tapping into the access of an int instance
In-Reply-To: <mailman.818.1190308885.2658.python-list@python.org>
References: <mailman.818.1190308885.2658.python-list@python.org>
Message-ID: <fcv463$tsd$2@daisy.noc.ucla.edu>

Tor Erik S?nvisen wrote:
> Hi,
> 
> Does anyone know how to interrupt the lookup of an integer value? I
> know I need to subclass int, since builtin types can't be altered
> directly...
> 
> Below is how far I've come... What I want is to tap into the access of
> instance i's value 1...
> 
>>>> class Int(int):
> 	def __init__(self, *a, **k):
> 		super(Int, self).__init__(self, *a, **k)
> 
> 		
>>>> i = Int(1)
>>>> i
> 1
> 
> Regards,
> Tor Erik

Perhaps you could elaborate on what you want to do with that value once 
you "tap" it.


From steve at holdenweb.com  Fri Sep  7 13:25:32 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 07 Sep 2007 10:25:32 -0700
Subject: Why 'class spam(object)' instead of class spam(Object)' ?
In-Reply-To: <46e10916$0$16518$4c368faf@roadrunner.com>
References: <mailman.205.1189146609.2658.python-list@python.org>
	<46e10916$0$16518$4c368faf@roadrunner.com>
Message-ID: <fbs1id$acq$1@sea.gmane.org>

Carl Banks wrote:
> On Fri, 07 Sep 2007 01:30:00 -0500, Sergio Correia wrote:
>> Hi, I'm kinda new to Python (that means, I'm a total noob here), but
>> have one doubt which is more about consistency that anything else.
>>
>> Why if PEP 8 says that "Almost without exception, class names use the
>> CapWords convention", does the most basic class, object, is lowercase?
> 
> It said "almost".  :)
> 
Indeed it did, and never forget that most of PEP 8 was derived from an 
essay by Guido whose original title was "A Foolish Consistency is the 
Hobgoblin of Little Minds" ...
> 
>> I found a thread about this:
>> http://mail.python.org/pipermail/python-list/2007-April/437365.html
>> where its stated that -object- is actually a type, not a class; but the
>> idea still doesn't convince me.
> 
You don't have to be convinced. You just have to do what the PEP says 
yourself and ignore the people who *haven't* done what it says 
(particularly if they are core Python developers).

> There's a false dichotomy there: it's not an either-or situation.  Almost 
> everyone would agree that new-style classes, defined by the Python class 
> statement, are both classes and types.  Some might squabble over whether 
> object is class, but it has nothing to do with why object is spelled in 
> lower-case.
> 
> The reason why "object" is lower case is because built-in types are 
> spelled in lower-case.  Why are built-in types lower case?  Because many 
> built-in types were originially functions.  For example, "int" and "str" 
> were once functions.  When these symbols became the names of their 
> respective types, they kept the lower-case spelling, and it became 
> convention for built-in types to be spelled lower-case.
> 
In other words: "Get over it" ;-)

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From DustanGroups at gmail.com  Sun Sep 16 20:57:06 2007
From: DustanGroups at gmail.com (Dustan)
Date: Mon, 17 Sep 2007 00:57:06 -0000
Subject: Python "with"
In-Reply-To: <fck2di$7to$1@ss408.t-com.hr>
References: <fck2di$7to$1@ss408.t-com.hr>
Message-ID: <1189990626.709096.166220@57g2000hsv.googlegroups.com>

On Sep 16, 3:07 pm, Ivan Voras <ivoras at __fer.hr__> wrote:
> Hi,
>
> I'm looking for a construct that's similar to (Turbo) Pascal's "with"
> statement. I read about the Python's new "with" statement, but I was
> dissapointed to learn that it does something different (I still don't
> see how it's better than try..except..finally, but that's not my question).
>
> Is there something similar to what I want that's Pythonic enough?
>
> (If you're not familiar with Pascal, here's how it works:
>
> with some.big.structure.or.nested.objects.element do begin
>      member1 := something;
>      member2 := something;
> end;
>
> which exactly translates to this equivalent:
>
> some.big.structure.or.nested.objects.element.member1 := something;
> some.big.structure.or.nested.objects.element.member2 := something;
>
> i.e. it's a wrist-saver. I think a similar feature exists in C99, for
> structs.
>
> I know it can be almost always done by using a temporary variable:
>
> tmp = some.big.structure.or.nested.objects.element
> tmp.member1 = something
> tmp.member2 = something
>
> but this looks ugly to me.)
>
>  signature.asc
> 1KDownload

>>> import this # Note item #5



From aleax at mac.com  Sun Sep  2 00:15:28 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 1 Sep 2007 21:15:28 -0700
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<7xlkbsmqe4.fsf@ruckus.brouhaha.com>
	<1188525647.003223.199620@q5g2000prf.googlegroups.com>
	<mailman.181.1188527203.28954.python-list@python.org>
	<1188537516.622167.115080@z24g2000prh.googlegroups.com>
	<mailman.192.1188556734.28954.python-list@python.org>
	<1i3rxit.1750ghi14bbcm3N%aleax@mac.com>
	<mailman.287.1188702321.28954.python-list@python.org>
Message-ID: <1i3s2rz.1pkz4z1i1e3a1N%aleax@mac.com>

Ricardo Ar?oz <ricaraoz at gmail.com> wrote:
   ...
> >> We should remember that the level
> >> of security of a 'System' is the same as the level of security of it's
> >> weakest component,
   ...
> You win the argument, and thanks you prove my point. You typically
> concerned yourself with the technical part of the matter, yet you
> completely ignored the point I was trying to make.

That's because I don't particularly care about "the point you were
trying to make" (either for or against -- as I said, it's a case of ROI
for different investments [in either security, or, more germanely to
this thread, reliability] rather than of useful/useless classification
of the investments), while I care deeply about proper system thinking
(which you keep failing badly on, even in this post).

> In the third part of your post, regarding security, I think you went off
> the road. The weakest component would not be one of the requisites of
> access, the weakest component I was referring to would be an actual
> APPLICATION,

Again, F- at system thinking: a system's components are NOT just
"applications" (what's the alternative to their being "actual", btw?),
nor is it necessarily likely that an application would be the weakest
one of the system's components (these wrong assertions are in addition
to your original error, which you keep repeating afterwards).

For example, in a system where access is gained *just* by knowing a
secret (e.g., a password), the "weakest component" is quite likely to be
that handy but very weak architectural choice -- or, seen from another
viewpoint, the human beings that are supposed to know that password,
remember, and keep it secret.  If you let them choose their password,
it's too likely to be "fred" or other easily guessable short word; if
you force them to make it at least 8 characters long, it's too likely to
be "fredfred"; if you force them to use length, mixed case and digits,
it's too likely to be "Fred2Fred".  If you therefore decide that
passwords chosen by humans are too weak and generate one for them,
obtaining, say, "FmZACc2eZL", they'll write it down (perhaps on a
post-it attached to their screen...) because they just can't commit to
memory a lot of long really-random strings (and nowadays the poor users
are all too likely to need to memorize far too many passwords).  A
clever attacker has many other ways to try to steal passwords, from
"social engineering" (pose as a repair person and ask the user to reveal
their password as a prerequisite of obtaining service), to keystroke
sniffers of several sorts, fake applications that imitate real ones and
steal the password before delegating to the real apps, etc, etc.

Similarly, if all that's needed is a physical token (say, some sort of
electronic key), that's relatively easy to purloin by traditional means,
such as pickpocketing and breaking-and-entering; certain kind of
electronic keys (such as the passive unencrypted RFID chips that are
often used e.g. to control access to buildings) are, in addition,
trivially easy to "steal" by other (technological) means.

Refusing to admit that certain components of a system ARE actually part
of the system is weak, blinkered thinking that just can't allow halfway
decent system design -- be that for purposes of reliability, security,
availability, or whatever else.  Indeed, if certain part of the system's
architecture are OUTSIDE your control (because you can't redesign the
human mind, for example;-), all the more important then to make them the
focus of the whole design (since you must design AROUND them, and any
amelioration of their weaknesses is likely to have great ROI -- e.g., if
you can make the users take a 30-minutes short course in password
security, and accompany that with a password generator that makes
reasonably memorable though random ones, you're going to get substantial
returns on investment in any password-using system's security).

> e.g. an ftp server. In that case, if you have several
> applications running your security will be the security of the weakest
> of them.

Again, false as usual, and for the same reason I already explained: if
your system can be broken by breaking any one of several components,
then it's generally WEAKER than the weakest of the components.  Say that
you're running on the system two servers, an FTP one that can be broken
into by 800 hackers in the world, and a SSH one that can only be broken
into by 300 hackers in the world; unless every single one of the hackers
who are able to break into the SSH server is *also* able to break into
the FTP one (a very special case indeed!), there are now *MORE* than 800
hackers in the world that can break into your system as a whole -- in
other words, again and no matter how often you repeat falsities to the
contraries without a shred of supporting argument, your assertion is
*FALSE*, and in this case your security is *WEAKER* than the security of
the weaker of the two components.

I do not really much care what point(s) you are trying to make through
your glib and false assertions: I *DO* care that these falsities, these
extremely serious errors that stand in the way of proper system
thinking, be never left unchallenged and uncorrected.  Unfortunately a
*LOT* of people (including, shudder, ones who are responsible for
architecting, designing and implementing some systems) are under very
serious misapprehensions that impede "system thinking", some of the same
ilk as your falsities (looking at only PART of the system and never the
whole, using far-too-simplified rules of thumbs to estimate system
properties, and so forth), some nearly reversed (missing opportunities
to make systems *simpler*, overly focusing on separate components, &c).

As to your specific point about "program proofs" being likely overkill
(which doesn't mean "useless", but rather means "low ROI" compared to
spending comparable resources in other reliability enhancements), that's
probably true in many cases.  But when a probably-true thesis is being
"defended" by tainted means, such as false assertions and excessive
simplifications that may cause serious damage if generally accepted and
applied to other issues, debunking the falsities in question is and
remains priority number 1 for me.


Alex


From bignose+hates-spam at benfinney.id.au  Sun Sep 16 20:39:53 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 17 Sep 2007 10:39:53 +1000
Subject: Needless copying in iterations?
References: <fchk59$mm3$1@daisy.noc.ucla.edu>
	<5l3ab6F5v20uU3@mid.uni-berlin.de>
	<13eourdrne86e61@corp.supernews.com>
	<874phv42to.fsf@benfinney.id.au>
	<13epv3fnb6bak15@corp.supernews.com>
Message-ID: <87wsuq2kh2.fsf@benfinney.id.au>

Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> writes:

> On Sun, 16 Sep 2007 15:05:55 +1000, Ben Finney wrote:
> > The compiler for a dynamic language like Python has very little
> > absolute "no significant side-effect in these specific cases"
> > guarantee of the kind you're assuming even in the cases you choose
> > for contrast with the ones that *do* have significant
> > side-effects.
> 
> Yes, in general one might not be able to make those guarantees, but
> still there are common cases where you can.

Perhaps. All my message was intended to show was that your message
didn't contain any such cases.

-- 
 \         "If life deals you lemons, why not go kill someone with the |
  `\  lemons (maybe by shoving them down his throat)."  -- Jack Handey |
_o__)                                                                  |
Ben Finney


From dc79it at gmail.com  Wed Sep 26 03:15:30 2007
From: dc79it at gmail.com (dc79it at gmail.com)
Date: Wed, 26 Sep 2007 00:15:30 -0700
Subject: FTP upload through proxy
Message-ID: <1190790930.519414.232920@r29g2000hsg.googlegroups.com>

Hi,

I hav'been searching the groups for a way to _upload_ a file
to a ftp site using a proxy server with URLLIB (1 or 2) or FTPLIB.

I can download a file from a ftp site through the proxy - but I need
to be able to upload.

There are some postings about file uploads using http_post but none
mentioned ftp uploads using urllib2 over proxy server ...

Has anyone done this ?  Can it be done ?

Thanks



From darran at edmstudio.com  Wed Sep 19 15:58:38 2007
From: darran at edmstudio.com (darran)
Date: Wed, 19 Sep 2007 12:58:38 -0700
Subject: urllib2 POST problem
Message-ID: <1190231918.779534.22810@v29g2000prd.googlegroups.com>

I'm struggling with using urllib2 to access the Harvest time-tracking
web service (http://www.getharvest.com/api).  GET is working fine.
POST is giving me a problem.  Here is an example that creates a new
time-tracking entry using curl.

$ curl http://subdomain.harvestapp.com/daily/add -H 'Accept:
application/xml' \
  -H 'Content-Type: application/xml' \
  -u myusername:mypassword \
  -d '<request><notes>testing API</notes><hours>3.5</
hours><project_id>65750</project_id><task_id>79702</
task_id><spent_at>Thu, 13 Sep 2007</spent_at></request>'

Here's a selection of info from running the above with --verbose
output:

* About to connect() to edmstudio.harvestapp.com port 80
> POST /daily/add HTTP/1.1
> Authorization: Basic xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Accept: application/xml
> Content-Type: application/xml
> Content-Length: 154
>
> <request><notes>testing API</notes><hours>3.5</hours><project_id>65750</project_id><task_id>79702</task_id><spent_at>Thu, 13 Sep 2007</spent_at></request>HTTP/1.1 201 Created

Notice that 1) it is a POST, and 2) the data is going across as an
unencoded (xml) string.  Now here is my attempt to achieve this with
python's urllib2:

entry = "<request><notes>testing API</notes><hours>3.5</
hours><project_id>65750</project_id><task_id>79702</
task_id><spent_at>Thu, 13 Sep 2007</spent_at></request>"

import urllib2
import base64
opener = urllib2.build_opener()
opener.addheaders = [
    ('Content-Type', 'application/xml'),
    ('Accept', 'application/xml'),
    ('Authorization', 'Basic %s' \
     % base64.encodestring('%s:%s' % (myusername, mypassword)))]

# this GET works just fine - proof that authentication is correct
req = urllib2.Request(url='http://subdomain.harvestapp.com/daily')
response = opener.open(req)
print response.read()

# this POST (same data as the above curl example) fails with an
internal server error (500)
req = urllib2.Request(url='http://subdomain.harvestapp.com/daily/add',
data=entry)
response = opener.open(req)
print response.read()

I'm stumped.  As always, any help is much appreciated.



From fdu.xiaojf at gmail.com  Sat Sep 29 10:34:21 2007
From: fdu.xiaojf at gmail.com (fdu.xiaojf at gmail.com)
Date: Sat, 29 Sep 2007 22:34:21 +0800
Subject: question about for cycle
In-Reply-To: <1191073123.459709.98870@g4g2000hsf.googlegroups.com>
References: <mailman.1275.1191060311.2658.python-list@python.org>
	<1191073123.459709.98870@g4g2000hsf.googlegroups.com>
Message-ID: <46FE626D.5060404@gmail.com>

tokland at gmail.com wrote:
 > On 29 sep, 12:04, "fdu.xia... at gmail.com" <fdu.xia... at gmail.com> wrote:
 >
 >> for i in generator_a:  # the first "for" cycle
 >>      for j in generator_b:
 >>          if something_happen:
 >>              # do something here ..., I want the outer cycle to break
 >>              break
 >
 > Do you like this?
 >
 > generator_ab = ((x, y) for x in generator_a for y in generator_b)
 > for i, j in generator_ab:
 >     if condition:
 >         # do something
 >         break
 >
  In this case, the tuple generator_ab must be generated first. Sometime
  it maybe a waste to generate all possible combinations of i,j first.

  I have googled and found the PEP-3136(Labeled break and continue),
  which has been rejected. I have also read why Guido rejected this PEP(
  http://mail.python.org/pipermail/python-3000/2007-July/008663.html),
  but I still think labeled break and continue is a good feature in my
  case.

  Regards,





From software at ginstrom.com  Thu Sep 13 07:43:11 2007
From: software at ginstrom.com (Ryan Ginstrom)
Date: Thu, 13 Sep 2007 20:43:11 +0900
Subject: Setting stdout encoding
In-Reply-To: <cfb578b20709130408u2bf27cabl72d230f5252480a6@mail.gmail.com>
References: <1189416350.069995.220250@w3g2000hsg.googlegroups.com><cfb578b20709100602i4146f5c0hd2a1343f644a90f@mail.gmail.com><op.tygmb9nux6zn5v@gabriel2.softlabbsas.com.ar><cfb578b20709110358n5801c19ie21d95ef1161e4c0@mail.gmail.com><op.tykwpjijx6zn5v@gabriel2.softlabbsas.com.ar>
	<cfb578b20709130408u2bf27cabl72d230f5252480a6@mail.gmail.com>
Message-ID: <00e601c7f5fb$43d5ccf0$0203a8c0@MOUSE>

> On Behalf Of Fabio Zadrozny
> Makes sense... Do you think that creating a new object, 
> setting it as sys.stdout and overriding its write() method to 
> check for a unicode string to do 
> original_stdout.write(unicode_str.encode(my_encoding)) would 
> do it?

Here's an output stream encoder I have used. It might be kind of screwball,
so I'd welcome any feedback on it, but it does work for encoding output
streams.

import sys

class OutStreamEncoder(object):
    """Wraps an out stream with an encoder"""

    def __init__(self, outstream, encoding=None):
        self.stdout = outstream
        if not encoding:
            self.encoding = sys.getfilesystemencoding()
        else:
            self.encoding = encoding

    def write(self, obj):
        """Wraps the output stream's write method, encoding it with
        the specified encoding"""

        self.stdout.write(obj.encode(self.encoding))

    def __getattr__(self, attr):
        """Delegate everything but write to the stream"""

        if attr != "write":
            return getattr(self.stdout, attr)
        return self.write


>>> from cStringIO import StringIO as si
>>> out = si()
>>> nihongo = unicode("???", "sjis")
>>> print >> out, nihongo

Traceback (most recent call last):
  File "<pyshell#40>", line 1, in <module>
    print >> out, nihongo
UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-2:
ordinal not in range(128)
>>> out = OutStreamEncoder(out, "utf-8")
>>> print >> out, nihongo
>>> val = out.getvalue()
>>> print val.decode("utf-8")
???

>>> 

Regards,
Ryan Ginstrom



From perl4hire at softouch.on.ca  Wed Sep 12 20:54:05 2007
From: perl4hire at softouch.on.ca (Amer Neely)
Date: Wed, 12 Sep 2007 20:54:05 -0400
Subject: Coming from Perl
In-Reply-To: <87wsuv5r83.fsf@benfinney.id.au>
References: <Cv%Fi.198$372.59@read2.cgocable.net>
	<87wsuv5r83.fsf@benfinney.id.au>
Message-ID: <lR%Fi.203$372.178@read2.cgocable.net>

Ben Finney wrote:
> Amer Neely <perl4hire at softouch.on.ca> writes:
> 
>> A question I have, if someone here is familiar with Perl, does Python
>> have something like Perl's 'here document'?
> 
> I'm not sure exactly what behaviour you want, but Python accepts
> literal strings to be triple-quoted (i.e. delimited by """ pairs or
> ''' pairs), which allows you to freely use literal line feed and quote
> characters inside that string.
> 
>     <URL:http://docs.python.org/ref/strings.html>
> 

I saw that and I guess that is the closest thing. In Perl I can do ..

print <<EndHTML;
<html>
<body>
Hello
</body>
</html>
EndHTML

In this case 'EndHTML' is a label, and I'm telling perl to print 
everything as is up to that label.

-- 
Amer Neely
w: www.webmechanic.softouch.on.ca/
Perl | MySQL programming for all data entry forms.
"Others make web sites. We make web sites work!"


From guruyaya at gmail.com  Mon Sep 17 05:54:07 2007
From: guruyaya at gmail.com (guruyaya)
Date: Mon, 17 Sep 2007 02:54:07 -0700
Subject: python libs for MinGW
Message-ID: <1190022847.857960.17720@19g2000hsx.googlegroups.com>

Hi. Strange. I have wrote this message before but somehow it just
vanished. I'll try again.
I want to install pyqt, on my windows XP using python 2.3. To do that
I need to install qt, and to do that, I need to install sip 4.7. Now
python configure give out (among lots of other errors), this line:
siplib.o:siplib.c:(.text+0x17): undefined reference to
`_imp__PyType_Type'
That I understand indicate I don't have python development libs in my
mingw (version  3.4.2). I cannot find it. I just looked all over for
it, and found none. Can anyone show me where it can be found? I prefer
a pre-compiled, but a well documented compiled eddition will do the
trick as well.

Thanks In Advance
Yair



From Caseyweb at gmail.com  Thu Sep 27 21:49:03 2007
From: Caseyweb at gmail.com (Casey)
Date: Thu, 27 Sep 2007 18:49:03 -0700
Subject: getopt with negative numbers?
In-Reply-To: <mailman.1196.1190937544.2658.python-list@python.org>
References: <1190913250.198794.269530@k79g2000hse.googlegroups.com>
	<fdgpic$ssu$00$1@news.t-online.com>
	<1190915197.390247.313590@57g2000hsv.googlegroups.com>
	<fdgri5$ssu$00$2@news.t-online.com>
	<mailman.1182.1190917341.2658.python-list@python.org>
	<1190930134.780005.68510@22g2000hsm.googlegroups.com>
	<mailman.1196.1190937544.2658.python-list@python.org>
Message-ID: <1190944143.521085.66910@g4g2000hsf.googlegroups.com>

On Sep 27, 7:57 pm, Neal Becker <ndbeck... at gmail.com> wrote:
> One person's "brilliant" is another's "kludge".
Well, it is a hack and certainly not as clean as having getopt or
optparse handle this natively (which I believe they should).  But I
think it is a simple and clever hack and still allows getopt or
optparse to function normally.  So I wouldn't call it a kludge, which
implies a more clumsy hack. As you say, it is all a matter of
perspective.



From pyth0nc0d3r at gmail.com  Fri Sep 14 00:12:48 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Thu, 13 Sep 2007 23:12:48 -0500
Subject: Just bought Python in a Nutshell
Message-ID: <eb79828c0709132112o5a3e7137n5ae5cd55e3e0b839@mail.gmail.com>

http://www.powells.com/biblio/63-9780596001889-7  Used, has anyone read this
book.  Any additional information that you like,dislike about this book? [I
like having real books and stead of ebooks because its better on the eyes.]
Should be her 2morrow Afternoon :), few hours before I get home great deal
:D.
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From deets at nospam.web.de  Wed Sep  5 06:20:27 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 05 Sep 2007 12:20:27 +0200
Subject: concise code (beginner)
References: <13dsvqrqivtf092@corp.supernews.com>
Message-ID: <5k7e7bF2g23sU1@mid.uni-berlin.de>

bambam wrote:

> I have about 30 pages (10 * 3 pages each) of code like this
> (following). Can anyone suggest a more compact way to
> code the exception handling? If there is an exception, I need
> to continue the loop, and continue the list.
> 
> Steve.
> 
> -----------------------------------
> for dev in devs
>     try:
>         dev.read1()
>     except
>         print exception
>         remove dev from devs
> 
> for dev in devs
>     try:
>         dev.read2()
>     except
>         print exception
>         remove dev from devs
> 
> for dev in devs
>     try:
>         dev.read3()
>     except
>         print exception
>         remove dev from devs

for method in (DevClass.read1, DevClass.read2, ...):
  for dev in devs:
      try:
        method(dev)
      except:
        print execption
        remove dev from devs

Diez


From cokofreedom at gmail.com  Thu Sep 20 12:02:35 2007
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Thu, 20 Sep 2007 09:02:35 -0700
Subject: os.path.getmtime() and compare with a date type
In-Reply-To: <1190302285.127448.288010@22g2000hsm.googlegroups.com>
References: <1190302285.127448.288010@22g2000hsm.googlegroups.com>
Message-ID: <1190304155.227750.125130@g4g2000hsf.googlegroups.com>

On Sep 20, 5:31 pm, junchi.t... at gmail.com wrote:
> Hi,
> I am new to python and are tryint to write a simple program delete log
> files that are older than 30 days.
>
> So I used os.path.getmtime(filepath) and compare it with a date but it
> does not compile.
>
> threshold_time = datetime.date.today() - datetime.timedelta(days=30)
> mod_time = os.path.getmtime(file_path)
>
> if( mod_time < threshold_time):
>          #delete file
>
> However the interpreter complains at the if line, say "can't comapre
> datetime.date to int
>
> How can I covert one of them to make it work?
>
> Thank you!

would putting it within int() work? I've not had much experience with
time module, but I guess it must have a similar function...



From daniel.j.larsson at gmail.com  Tue Sep  4 16:29:58 2007
From: daniel.j.larsson at gmail.com (Daniel Larsson)
Date: Tue, 4 Sep 2007 22:29:58 +0200
Subject: doctest and decorators
Message-ID: <2bfa72fa0709041329i14b5b547i2eb85250f7547da@mail.gmail.com>

Hi,

I assume this is a FAQ, but I couldn't find much helpful information
googling. I'm having trouble with doctest skipping my functions, if I'm
using decorators (that are defined in a separate module). If I'm
understanding what is happening correctly, it's because doctest checks if
the function's func_global attribute is the same as the module's __dict__
attribute. The decorator in question returns a wrapping function, though, so
this check fails.

What are some solutions to this? I can define __test__, but it seems rather
cumbersome.
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From fredrik at pythonware.com  Wed Sep 26 07:53:44 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 26 Sep 2007 13:53:44 +0200
Subject: Asynchronous Messaging
In-Reply-To: <1190807252.731074.141450@k79g2000hse.googlegroups.com>
References: <1190807252.731074.141450@k79g2000hse.googlegroups.com>
Message-ID: <fddh87$8k1$1@sea.gmane.org>

wink wrote:

> This provides two benefits, a sender is never directly effected by the
> receiver and since the receiver handles only one message at a time
> it generally never has to use mutexes or semaphores. This allows for
> the programmer to use multiple threads without having to contend with the
> associated issues mutexes have in the area of deadly embraces or race
> conditions.

import Queue # ?

</F>



From aleax at mac.com  Mon Sep 24 11:40:04 2007
From: aleax at mac.com (Alex Martelli)
Date: Mon, 24 Sep 2007 08:40:04 -0700
Subject: Google and Python
References: <1190228512.627109.308910@n39g2000hsh.googlegroups.com>
	<ufadnRC5BPZm6GzbnZ2dnUVZ_jOdnZ2d@comcast.com>
	<1190231094.276099.136250@22g2000hsm.googlegroups.com>
	<mailman.781.1190232163.2658.python-list@python.org>
	<1190235678.019823.315850@o80g2000hse.googlegroups.com>
	<SYpIi.5291$7P7.2845@newssvr19.news.prodigy.net>
	<1i4rfyx.8vuc2j14j596uN%aleax@mac.com>
	<SFJJi.316$ua4.285@newssvr22.news.prodigy.net>
Message-ID: <1i4xorh.j5nc9k3y60vqN%aleax@mac.com>

Bryan Olson <fakeaddress at nowhere.org> wrote:
   ...
> > YouTube (one of Google's most valuable properties) is essentially
> > all-Python (except for open-source infrastructure components such as
> > lighttpd).  Also, at Google I'm specifically "Uber Tech Lead, Production
> > Systems": while I can't discuss details, my main responsibilities relate
> > to various software projects that are part of our "deep infrastructure",
> > and our general philosophy there is "Python where we can, C++ where we
> > must". 
> 
> Good motto. So is most of Google's code base now in
> Python? About what is the ratio of Python code to C++
> code? Of course lines of code is kine of a bogus measure.
> Of all those cycles Google executes, about what portion
> are executed by a Python interpreter?

I don't have those numbers at hand, and if I did they would be
confidential: you know that Google doesn't release many numbers at all
about its operations, most particularly not about our production
infrastructure (not even, say, how many server we have, in how many data
centers, with what bandwidth, and so on).

Still, I wouldn't say that "most" of our codebase is in Python: there's
a lot of Java, a lot of C++, a lot of Python, a lot of Javascript (which
may not correspond to all that many "cycles Google executes" since the
main point of coding in Javascript is having it execute in the user's
browser, of course, but it's still code that gets developed, debugged,
deployed, maintained), and a lot of other languages including ones that
Google developed in-house such as
<http://labs.google.com/papers/sawzall.html> .


> > Python is definitely not "just a tiny little piece" nor (by a
> > long shot) used only for "scripting" tasks; 
> 
> Ah, sorry. I meant the choice of scripting language was
> a tiny little piece of Google's method of operation.

In the same sense in which other such technology choices (C++, Java,
what operating systems, what relational databases, what http servers,
and so on) are similarly "tiny pieces", maybe.  Considering the number
of technology choices that must be made, plus the number of other
choices that aren't directly about technology but, say, about
methodology (style guides for each language in use, mandatory code
reviews before committing to the shared codebase, release-engineering
practices, standards for unit-tests and other kinds of tests, and so on,
and so forth), one could defensibly make a case that each and every such
choice must of necessity be "but a tiny little piece" of the whole.

> "Scripting language" means languages such as Python,
> Perl, and Ruby.

A widespread terminology, but nevertheless a fundamentally bankrupt one:
when a language is used to develop an application, it's very misleading
to call it a "scripting language", as it implies that it's instead used
only to "script" something else.  When it comes time to decide which mix
of languages to use to develop a new application, it's important to
avoid being biased by having tagged some languages as "scripting" ones,
some (say Java) as "application" ones, others yet (say C++) as "system"
ones -- the natural subconscious process would be to say "well I'm
developing an X, I should use an X language, not a Y language or a Z
language", which is most likely to lead to wrong choices.


> > if the mutant space-eating
> > nanovirus should instantly stop the execution of all Python code, the
> > powerful infrastructure that has been often described as "Google's
> > secret weapon" would seize up.
> 
> And the essence of the Google way is to employ a lot of
> smart programmers to build their own software to run on
> Google's infrastructure. Choice of language is triva.

No, it's far from trivial, any more than choice of operating system, and
so on.  Google is a technology company: exactly which technologies to
use and/or develop for the various necessary tasks, far from being
trivial, is the very HEART of its operation.

Your ludicrous claim is similar to saying that the essence of a certain
hedge fund is to employ smart traders to make a lot of money by
sophisticated trades (so far so reasonable) and (here comes the idiocy)
"choice of currencies and financial instruments is trivia" (?!?!?!) --
it's the HEART of such a fund, to pick and choose which positions to
build, unwind, or sell-on, and which (e.g.) currencies should be
involved in such positions is obviously *crucial*, one of the many
important decisions those "smart traders" make every day, and far from
the least important of the many.  And similarly, OF COURSE, for choices
of technologies (programming languages very important among those) for a
technology company, just like, say, what horticultural techniques and
chemicals to employ would be for a company whose "essence" was
cultivating artichokes for sale on the market, and so on.


> I think both Python Google are great. What I find
> ludicrous is the idea that the bits one hears about how
> Google builds its software make a case for how others
> should build theirs.

To each his own, I guess: what I find ludicrous is your claim about
"trivia", as I explained above.  To me, on the contrary, it seems
self-evident that if a company X enjoys great success employing
technique Y, this *DOES* make something of a case for another company Z
to seriously consider and probably try out Y, when attempting tasks
analogous to those X has had success with, to see if some of the success
could not be replicable in Z's own similar tasks.  This is the heart of
"benchmarking" and "industry best practices" -- and why many companies
in the role of X aren't all that forthcoming about publicizing all the
details of their Y's, just in case Z's endeavours should put Z in
competition with X (this always needs to be balanced with the many
_advantages_ connected to publicizing some of those Y's, of course).

Such empirical support, while of course far from infallible (one will
always have to take into consideration many details, and the devil is in
the details), tends to perform vastly better in supporting decision
making than purely abstract considerations bereft of any such empirical
underpinnings.

> Google is kind of secretive, and
> their ways are very much their own. Google's software
> is much more Googley than Pythonic.

Nevertheless, if "Python has been an important part of Google since the
beginning" (as my colleague Peter Norvig said well before I joined
Google, then Guido did, etc etc), then clearly being Pythonic can be *an
important part* (NOT "trivia"!!!) of being Googley, and it would be
seriously stupid to choose to ignore this crucial data point.  YouTube's
choice of Python, done well before anybody had even conceived of their
becoming part of Google one day, does seem to have served them
particularly well too (and they gave lots of details in their talk on
the subject at OSCON, some materials are at
<http://www.scribd.com/doc/244443/Supersising-YouTube-with-Python> and
you can search web and blogs for more), etc, etc.

One delightful part of working at Google is that top management is *NOT*
made up of pointy-haired beancounters who consider such issues as choice
of technologies "trivia" -- Eric Schmidt (the CEO) started his career by
coding "lex" (the lexical analyzer part of the yacc/lex combination),
Stu Feldman started his by writing "make" (still the best-known
semi-automated software-build approach), Urs H?lzle pioneered
just-in-time compilers, Udi Manber wrote a great book on algorithms
(using a somewhat Pascal-like pseudocode which however used indentation
to denote blocks;-), etc, etc.  They KNOW how important ("trivia"
indeed...!-) such choices are: that's part of what makes them great
leaders of passionate engineers -- they haven't and never will forget
their own engineering roots.


Alex


From janencarl at aznex.net  Mon Sep  3 22:15:37 2007
From: janencarl at aznex.net (Carl Trachte)
Date: Mon, 3 Sep 2007 19:15:37 -0700
Subject: py3k - format specifier for strings
Message-ID: <eeednfMnn5paIkHbnZ2dnUVZ_sGvnZ2d@trueband.net>

Hello.
Python 3.0.a1 has been released.  I'm trying to get the hang of the new
string formatting in the form:

>>> a = "{0}".format(5.66)
>>> a
'5.66'

There are more options in PEP 3101 (fill, alignment, etc.), but I'm having
trouble implementing them.  The doc has not yet been written.  I haven't
consulted the source code yet.

Any help in the way of examples would be appreciated.

Carl T.




From jecarnell at saintfrancis.com  Tue Sep  4 14:03:16 2007
From: jecarnell at saintfrancis.com (Carnell, James E)
Date: Tue, 4 Sep 2007 13:03:16 -0500
Subject: Noob: What is a slot? Me trying to understand another's code
In-Reply-To: <mailman.61.1188906904.2656.python-list@python.org>
Message-ID: <CEFAE560FE3E3C458A2335A1AA37A82D06763950@MAIL2W2K3.WarrenNT.SaintFrancis.Loc>



I am thinking about purchasing a book, but wanted to make sure I could
get through the code that implements what the book is about (Artificial
Intelligence a Modern Approach). Anyway, I'm not a very good programmer
and OOP is still sinking in, so please don't answer my questions like I
really know anything.

MY QUESTION:
What is a slot? In class Object below the __init__ has a slot.  Note:
The slot makes use of a data object called 'percept' that is used in the
TableDrivenAgent(Agent) at the bottom of this post. I am guessing this
is a type of Finite State Machine (I haven't bought the book yet so I am
guessing).

MY GUESS AT THE ANSWER:
I've played around with it, and my guess is that is just some data
container local to the instance of Object (after it has been extended or
inherited or whatever). In other words, if I would have made some global
dictionary that each instance of Object and or Agent(Object) could
access it would be possible to allow instances of other classes to
access the global dictionary.

Why not make a class instance have something like a dictionary for
keeping it's own records like self.myListOfActions then you could append
to it etc. I guess it wouldn't be private, but I don't think anything
really is private in python.

Anyway, why a slot (whatever that is)?


class Object:
    """This represents any physical object that can appear in an
Environment.
    You subclass Object to get the objects you want.  Each object can
have a
    .__name__  slot (used for output only)."""
    def __repr__(self):
        return '<%s>' % getattr(self, '__name__',
self.__class__.__name__)

    def is_alive(self):
        """Objects that are 'alive' should return true."""
        return hasattr(self, 'alive') and self.alive

class Agent(Object):
    """An Agent is a subclass of Object with one required slot,
    .program, which should hold a function that takes one argument, the
    percept, and returns an action. (What counts as a percept or action
    will depend on the specific environment in which the agent exists.) 
    Note that 'program' is a slot, not a method.  If it were a method,
    then the program could 'cheat' and look at aspects of the agent.
    It's not supposed to do that: the program can only look at the
    percepts.  An agent program that needs a model of the world (and of
    the agent itself) will have to build and maintain its own model.
    There is an optional slots, .performance, which is a number giving
    the performance measure of the agent in its environment."""


##################### HERE IS THE SLOT #######################

    def __init__(self):
        def program(percept):
            return raw_input('Percept=%s; action? ' % percept)
        self.program = program
        self.alive = True

################THIS APPEARS LATER IN THE PROGRAM##############
< so you can see where the 'percept' is coming from and how it is being
used.

class TableDrivenAgent(Agent):
    """This agent selects an action based on the percept sequence.
    It is practical only for tiny domains.
    To customize it you provide a table to the constructor. [Fig.
2.7]"""
    
    def __init__(self, table):
        "Supply as table a dictionary of all {percept_sequence:action}
pairs."
        ## The agent program could in principle be a function, but
because
        ## it needs to store state, we make it a callable instance of a
class.
        Agent.__init__(self)
        ################################### percept ##########
        percepts = []
        def program(percept):
            percepts.append(percept)
            action = table.get(tuple(percepts))
            return action
        self.program = program


Thanks for your time (and patience),

James Carnell




From stargaming at gmail.com  Sat Sep 22 01:06:42 2007
From: stargaming at gmail.com (Stargaming)
Date: 22 Sep 2007 05:06:42 GMT
Subject: Getting rid of bitwise operators in Python 3?
References: <46f49740$0$32514$4c368faf@roadrunner.com>
Message-ID: <46f4a2e2$0$17220$9b622d9e@news.freenet.de>

On Fri, 21 Sep 2007 23:44:00 -0400, Carl Banks wrote:

> Anyone with me here?  (I know the deadline for P3 PEPs has passed; this
> is just talk.)
> 
> Not many people are bit-fiddling these days.

Why did we invent the `binary literals`_ (0b101) then?
  
> One of the main uses of
> bit fields is flags, but that's not often done in Python because of
> keyword arguments and dicts, which are lot more versatile.  Another
> major use, talking to hardware, is not something oft done in Python
> either.

Talking to hardware, parsing files or network streams and all this stuff 
where you cannot rely on 8 bit encoding so well.

> It seems like this occasional usage wouldn't justify having built-in
> operators on its own.  And with the int/long unification, it makes a bit
> less sense to think of integers as a bit field.  Python has these
> operators because of its heritage, but Python continues to move away
> from the bad habits of its ancestors (integer division and so on), and I
> wonder if this isn't another one.

Heh, ``0b1 / 0b11`` would be 0.33333333333333331 then. Particularly 
funny. ;)

> Of course I'm not suggesting to get rid of bitwise operations
> altogether; just make them builtin functions: "x & 1" becomes
> "bitwise_and(x,1)" and so on.
>
> Is it worth it to make such a change?  It would remove a lot of
> operators (11 by my count), vastly simplifying syntax,  Which, IMHO, is
> no small thing.  New numerical types would have fewer operations to
> support.  And let's face it: unlike arithmetic opertaions, there's not a
> lot of different meanings for bit operations. And it would also, um,
> make new special characters available *cough*.

You're right about the simplification here perhaps. But nobody is forced 
to either learn or use (please, don't invert this argument justifying "we 
can implement any feature then -- don't use it if you don't like it!" ;)) 
them. But it's just a little bit sugar -- like, say, decorators -- and I 
like that.
 
> Obviously, how widespread their usage is would matter.  But keep in mind
> it would also be easy to convert the code automatically, because the
> Python parser could reliably find all bitwise operations reliably.  (The
> problem would be types that overloaded them to be something other than
> bitwise operations: I'm looking at you, set.  That could very well be a
> deal breaker.  I've never approved of things with completely different
> meanings being deliberately overloaded to have the same spelling; this
> is one reason why.)

A quick `google code search`_ failed but IMO those operators give you 
some freedom to make *your* classes more syntactical-sugar'ly. ``<<`` is 
used in PyParsing, as far as I know.

> If anyone says, "But that takes away an easy test for oddness (x&1)!",
> or, "But you can multiply powers of two using left shift!  Isn't that
> cool?", I'm not buying it.  Those are gimmicks.  Arithmetic operations
> should be done with arithmetic operators.  The bitwise operators make
> the code much less readable, especially to people unfamiliar with this
> usage.

Full acknowledgement! But in bit-wise environments, they can be 
particularly useful.

> the-above-pun-was-intended-ly yr's,
> 
> Carl Banks

.. _binary literals: http://www.python.org/dev/peps/pep-3127/
.. _google code search: http://www.google.com/codesearch?hl=en&lr=&q=lang%
3Apython+%3C%3C+%3E%3E+%7E+%26+%5C%7C+%5C%5E


From bjourne at gmail.com  Thu Sep 13 10:30:36 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Thu, 13 Sep 2007 16:30:36 +0200
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <1189604018.520338.162520@57g2000hsv.googlegroups.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189604018.520338.162520@57g2000hsv.googlegroups.com>
Message-ID: <740c3aec0709130730k2226e9abmbf5defb579b77660@mail.gmail.com>

On 9/12/07, Dave Hansen <iddw at hotmail.com> wrote:
> The name "self" is just a convention.  You can give it any name you
> wish.  Using "s" is common.

Not it's not common. And the name "self" is a convention codified in
PEP8 which you shouldn't violate.

And I agree with the OP that the convention is really annoying.

  self.rect.width = self.foo(self.rect.x + self.rect.y) * self.boo()

is much less concise than

  s.rect.width = s.foo(s.rect.x + s.rect.y) * s.boo()

-- 
mvh Bj?rn


From arnodel at googlemail.com  Wed Sep  5 17:31:23 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 05 Sep 2007 14:31:23 -0700
Subject: Text processing and file creation
In-Reply-To: <1189008809.718361.45790@g4g2000hsf.googlegroups.com>
References: <1189008809.718361.45790@g4g2000hsf.googlegroups.com>
Message-ID: <1189027883.834083.291430@19g2000hsx.googlegroups.com>

On Sep 5, 5:13 pm, "malibus... at gmail.com" <malibus... at gmail.com>
wrote:
> I have a text source file of about 20.000 lines.>From this file, I like to write the first 5 lines to a new file. Close
>
> that file, grab the next 5 lines write these to a new file... grabbing
> 5 lines and creating new files until processing of all 20.000 lines is
> done.
> Is there an efficient way to do this in Python?

Sure!

> In advance, thanks for your help.

from my_useful_functions import new_file, write_first_5_lines,
done_processing_file, grab_next_5_lines, another_new_file, write_these

in_f = open('myfile')
out_f = new_file()
write_first_5_lines(in_f, out_f) # write first 5 lines
close(out_f)
while not done_processing_file(in_f): # until done processing
   lines = grab_next_5_lines(in_f) # grab next 5 lines
   out_f = another_new_file()
   write_these(lines, out_f) # write these
   close(out_f)
print "all done!" # All done
print "Now there are 4000 files in this directory..."

Python 3.0 - ready (I've used open() instead of file())

HTH

--
Arnaud




From kostaspaxos at yahoo.gr  Thu Sep 20 17:08:02 2007
From: kostaspaxos at yahoo.gr (Konstantinos Pachopoulos)
Date: Fri, 21 Sep 2007 00:08:02 +0300
Subject: about __str__
Message-ID: <46F2E132.9080002@yahoo.gr>

Hi,
i have the following class:
===========================================
class CmterIDCmts:   
    def __init__(self,commiterID,commits):
        self.commiterID_=long(commiterID)
        self.commits_=long(commits)
       

    def __str__(self):
        s=""
        s+="<"+str(self.commiterID_)+":"+str(self.commits_)+">"
        return s
===========================================

and then i create the following 2 objects and list:
===========================================
a=CmterIDCmts(2,3)
b=CmterIDCmts(4,5)
print a
print b
c=[]
c.append(a)
c.append(b)
print c
===========================================
and this is what i get:
===========================================
<2:3>
<4:5>
[<CmterIDCmts.CmterIDCmts instance at 821045869>, 
<CmterIDCmts.CmterIDCmts instance at 1735488308>]
===========================================

The __str__ method of "list" doesn't seem to call the __str__ method of 
the objects....
ie, __str__ is not equicalent to the Java toString() method... Anyway, 
how can i fix this?

Thanks


From perl4hire at softouch.on.ca  Sat Sep 15 09:35:17 2007
From: perl4hire at softouch.on.ca (Amer Neely)
Date: Sat, 15 Sep 2007 09:35:17 -0400
Subject: Coming from Perl - SOLVED
In-Reply-To: <YXzGi.2335$4J3.0@newssvr22.news.prodigy.net>
References: <Cv%Fi.198$372.59@read2.cgocable.net>	<QvnGi.2216$tx1.843@read1.cgocable.net>
	<YXzGi.2335$4J3.0@newssvr22.news.prodigy.net>
Message-ID: <ZaRGi.457$372.378@read2.cgocable.net>

I V wrote:
> On Thu, 13 Sep 2007 23:49:32 -0400, Amer Neely wrote:
>> In trying to track down why this script would not run on my host, it has
>> to come to light that Python is installed, however the Apache module is
>> not. So, short story is - I was flogging a dead horse.
> 
> Which Apache module? You don't need any special modules (just the regular 
> CGI one) to use python in a CGI script.

That is an interesting observation. It does run under my Apache + Win2K 
at home, with no special configuration by me. All I'm going on is what 
the techs told me.

So, you think it may be something else? I've changed and even eliminated 
the end-of-line chars in my print statements.

Another poster (Bryan Olson) has suggested a few things to try as well 
so I will try those. I don't have shell access though, so the best I can 
do is execute shell commands from a Perl script.

-- 
Amer Neely
w: www.webmechanic.softouch.on.ca/
Perl | MySQL programming for all data entry forms.
"Others make web sites. We make web sites work!"


From fdu.xiaojf at gmail.com  Sat Sep 29 23:32:01 2007
From: fdu.xiaojf at gmail.com (fdu.xiaojf at gmail.com)
Date: Sun, 30 Sep 2007 11:32:01 +0800
Subject: question about for cycle
In-Reply-To: <1191079144.724699.250470@o80g2000hse.googlegroups.com>
References: <mailman.1275.1191060311.2658.python-list@python.org>	<1191073123.459709.98870@g4g2000hsf.googlegroups.com>	<mailman.1278.1191076522.2658.python-list@python.org>
	<1191079144.724699.250470@o80g2000hse.googlegroups.com>
Message-ID: <46FF18B1.5030704@gmail.com>

George Sakkis wrote:
> On Sep 29, 10:34 am, "fdu.xia... at gmail.com" <fdu.xia... at gmail.com>
> wrote:
>> tokl... at gmail.com wrote:
>>
>>  > On 29 sep, 12:04, "fdu.xia... at gmail.com" <fdu.xia... at gmail.com> wrote:
>>  >
>>  >> for i in generator_a:  # the first "for" cycle
>>  >>      for j in generator_b:
>>  >>          if something_happen:
>>  >>              # do something here ..., I want the outer cycle to break
>>  >>              break
>>  >
>>  > Do you like this?
>>  >
>>  > generator_ab = ((x, y) for x in generator_a for y in generator_b)
>>  > for i, j in generator_ab:
>>  >     if condition:
>>  >         # do something
>>  >         break
>>  >
>>   In this case, the tuple generator_ab must be generated first.
> 
> It's not a tuple, it is a generator expression that can generate
> tuples *lazily*.
> 
>> Sometime it maybe a waste to generate all possible combinations of i,j first.
> 
> It doesn't; read about generator expressions at http://www.python.org/dev/peps/pep-0289/
> 
> George
> 
Thanks, I didn't realize that.

However, I still think labeled break and continue is a valuable feature, which 
is easier to understand and to use.



From tundra at tundraware.com  Sat Sep  1 22:26:11 2007
From: tundra at tundraware.com (Tim Daneliuk)
Date: Sat, 01 Sep 2007 21:26:11 -0500
Subject: So what exactly is a complex number?
In-Reply-To: <46d92f54$0$4533$9b4e6d93@newsspool3.arcor-online.net>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
	<mailman.212.1188576194.28954.python-list@python.org>
	<451mq4-les.ln1@ozzie.tundraware.com>
	<46d89ba9$0$30380$9b4e6d93@newsspool4.arcor-online.net>
	<fbamkq$r7q$5@lust.ihug.co.nz>
	<46d92f54$0$4533$9b4e6d93@newsspool3.arcor-online.net>
Message-ID: <tijpq4-uo22.ln1@ozzie.tundraware.com>

Wildemar Wildenburger wrote:
> Lawrence D'Oliveiro wrote:
>> In message <46d89ba9$0$30380$9b4e6d93 at newsspool4.arcor-online.net>, 
>> Wildemar
>> Wildenburger wrote:
>>
>>> Tim Daneliuk wrote:
>>>> One of the most common uses for Complex Numbers is in what are
>>>> called "vectors".  In a vector, you have both an amount and
>>>> a *direction*.  For example, I can say, "I threw 23 apples in the air
>>>> at a 45 degree angle".  Complex Numbers let us encode both
>>>> the magnitude (23) and the direction (45 degrees) as a "number".
>>>>
>>> 1. Thats the most creative use for complex numbers I've ever seen. Or
>>> put differently: That's not what you would normally use complex numbers
>>> for.
>>
>> But that's how they're used in AC circuit theory, as a common example.
>  >
> OK, I didn't put that in the right context, I guess. The "magnitude and 
> direction" thing is fine, I just scratched my head at the "23 apples at 
> 45 degrees" example. Basically because I see no way of adding 2 apples 

It was badly stated, I'll agree.  What I should have said is something
like "An apple is launched at 45 degrees." thereby sticking to the
magnitude and direction thing.

> at 16 degrees to 4 apples at 25 degrees and the result making any sense.

No, but go to my other example of an aircraft in flight and winds
aloft.  It is exactly the case that complex numbers provide a convenient
way to add these two "vectors" (don't wince, please) to provide the
effective speed and direction of the aircraft.  Numerous such examples
abound in physics, circuit analysis, the analysis of rotating machinery,
etc.

> Anyway, that was just humorous nitpicking on my side, don't take it too 
> seriously :).


I didn't and I concede I could have provided a better and crisper example.

> /W


-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From horpner at yahoo.com  Mon Sep 24 08:22:08 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Mon, 24 Sep 2007 12:22:08 GMT
Subject: An Editor that Skips to the End of a Def
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk> <fd0au1$fro$1@lust.ihug.co.nz>
	<5lhs4pF8bkunU1@mid.individual.net> <fd4168$ige$1@lust.ihug.co.nz>
Message-ID: <slrnfff9op.1is.horpner@FIAD06.norwich.edu>

On 2007-09-22, Lawrence D'Oliveiro
<ldo at geek-central.gen.new_zealand> wrote:
> In message <5lhs4pF8bkunU1 at mid.individual.net>, Bjoern
> Schliessmann wrote:
>> Nah. Use vim.
>
> Every other text editor I have ever used understands that the
> current position in a file is _between_ two characters (or
> before the first character, or after the last character), not
> _on_ a character. But not vi and its ilk.
>
> Try the following in vi/vim: Move to some point in the middle
> of a line. Press "i" to get into insert mode. Press escape to
> get out again. You'll end up one position to the left of where
> you were before. Press "i", and then escape again--you've moved
> another position left. Why is it incapable of keeping track of
> such a simple thing as your current position in the file?

That's a silly question. Of course it knows your current
position--it just chooses to modify your position when you exit
insert mode.

> Why does it need two different insert commands, "i" versus "a"?
> Because one of them can't insert at the end of a line, and the
> other can't insert at the beginning.

i and a are two of *many* ways to enter insert mode. I'm not sure
all of them are completely justified (I've never uses s or S, for
example). I typically use o, O, i, I and A the most. I don't have
much use for a.

> And why have command-versus-insert mode at all? No other text
> editor still surviving uses such an antiquated concept.

The existence of command mode allows plain old keystrokes to be
commands--it potentially makes commands easier to type. Emacs
users don't find it to be a compelling advantage. ;)

-- 
Neil Cerutti


From laurent.pointal at wanadoo.fr  Tue Sep 18 15:34:14 2007
From: laurent.pointal at wanadoo.fr (Laurent Pointal)
Date: Tue, 18 Sep 2007 21:34:14 +0200
Subject: Newbie question
References: <1190139661.046103.45440@19g2000hsx.googlegroups.com>
Message-ID: <46f02836$0$5097$ba4acef3@news.orange.fr>

 koutoo at hotmail.com wrote:

> If I have a file name: AVC1030708.14.  How do I strip out certain
> characters from the file name?  I am so used to using MID, LEFT, and
> RIGHT functions, that I have no idea how to do this in python?  I have
> had trouble as well with most newbies on finding the help.  But I have
> used the command line built in help, but with no luck.  Thanks.
> 
> Kou

As you seem to know about mid, left, right functions, you may have already
programmed with languages such as Basic.

Learning Python is usually easy, see Python tutorials in several places:
* http://docs.python.org/tut/tut.html
* http://www.awaretek.com/tutorials.html
* http://effbot.org/pytut/


Once you have the language basics, you can look after the standard library
documentation:
* http://docs.python.org/lib/lib.html

For a very quick overview of the language and the libraries, you may take a
look at R.Gruet Python Quick Reference or at my Python Quick Reference
Card - these are refs, not learning tools.
* http://rgruet.free.fr/
* http://www.limsi.fr/Individu/pointal/python/pqrc/ (still for Python 2.4 -
working on 2.5)




From aleax at mac.com  Sun Sep 16 02:30:40 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 15 Sep 2007 23:30:40 -0700
Subject: Just bought Python in a Nutshell
References: <eb79828c0709132112o5a3e7137n5ae5cd55e3e0b839@mail.gmail.com>
	<mailman.520.1189748935.2658.python-list@python.org>
	<1189784843.896396.108960@g4g2000hsf.googlegroups.com>
	<eb79828c0709141312v588ef074w25c2200c37951098@mail.gmail.com>
	<59f9c5160709141412q1098a4cbi989b6eed2f2cc899@mail.gmail.com>
	<eb79828c0709141432t582ddccbsda4750a4011666a9@mail.gmail.com>
	<eb79828c0709141459y264bc21fg4fcd17a4217cad65@mail.gmail.com>
	<46EB5B10.2020100@gmail.com>
	<96f089100709150107t10275d23p6b8cb7be6e748b7f@mail.gmail.com>
	<mailman.569.1189843719.2658.python-list@python.org>
	<1189854923.148481.294830@n39g2000hsh.googlegroups.com>
Message-ID: <1i4i965.w52gsnd3sh62N%aleax@mac.com>

7stud <bbxx789_05ss at yahoo.com> wrote:

> Used copies of computer books for out of date editions are always
> cheap.  "Python in a Nutshell (2nd ed)" is a reference book with a
> frustratingly poor index--go figure.  It also contains errors not
> posted in the errata.

You can always enter errata at
<http://www.oreilly.com/cgi-bin/errata.form/pythonian2> and thus help
all future readers of the book (if your errata are confirmed to be
valid).  Vague mentions of "errors not posted in the errata" are far
less useful (and unconfirmed, too).


Alex


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Sep 17 09:57:46 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 17 Sep 2007 15:57:46 +0200
Subject: Web Programming thru python
In-Reply-To: <1190037018.743304.142700@19g2000hsx.googlegroups.com>
References: <1190027654.008396.326100@57g2000hsv.googlegroups.com>
	<1190037018.743304.142700@19g2000hsx.googlegroups.com>
Message-ID: <46ee87d8$0$12286$426a74cc@news.free.fr>

danfolkes a ?crit :
(top post corrected - Daniel, please, avoid top-posting...)
> On Sep 17, 7:14 am, python_lover <govisath... at gmail.com> wrote:
>> HI,
>>
>> Please help how to execute a py file with xitami.
>>
>> I installed xitami , downloaded lrwp file.
>>
>> accessing the first web application program
>>
>> import urllib
>> # Get a file-like object for the Python Web site's home page.
>> f = urllib.urlopen("http://www.python.org")
>> # Read from the object, storing the page's contents in 's'.
>> s = f.read()
>> f.close()
>>
>> through browser like "http://localhost/first.py
>>
>> it is dispaying the source code of the first.py.
>>
>> Please help me how to execute the file.
>>
> 
 > I have been wondering the same thing.  I know you have to load the
 > mod_python into apache.

Not necessarily - there are other ways to serve python-generated dynamic 
content from apache. But anyway, please note the OP is asking about 
xitami, not apache...



From Caseyweb at gmail.com  Thu Sep 27 18:01:19 2007
From: Caseyweb at gmail.com (Casey)
Date: Thu, 27 Sep 2007 22:01:19 -0000
Subject: getopt with negative numbers?
In-Reply-To: <mailman.1182.1190917341.2658.python-list@python.org>
References: <1190913250.198794.269530@k79g2000hse.googlegroups.com>
	<fdgpic$ssu$00$1@news.t-online.com>
	<1190915197.390247.313590@57g2000hsv.googlegroups.com>
	<fdgri5$ssu$00$2@news.t-online.com>
	<mailman.1182.1190917341.2658.python-list@python.org>
Message-ID: <1190930479.886915.229070@o80g2000hse.googlegroups.com>

On Sep 27, 2:21 pm, "J. Clifford Dyer" <j... at sdf.lonestar.org> wrote:
> If you can access the argument list manually, you could scan it for a negative integer,
> and then insert a '--' argument before that, if needed, before passing it to getopt/optparse.
> Then you wouldn't have to worry about it on the command line.
>
> Cheers,
> Cliff

Brilliant!

# Look for the first negative number (if any)
for i,arg in enumerate(sys.argv[1:]):
    # stop if a non-argument is detected
    if arg[0] != "-": break
    # if a valid number is found insert a "--" string before it which
    # explicitly flags to getopt the end of options
    try:
        f = float(arg)
        sys.argv.insert(i+1,"--")
        break;
    except ValueError:
        pass



From duncan.booth at invalid.invalid  Tue Sep  4 07:33:00 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 4 Sep 2007 11:33:00 GMT
Subject: Printing lists in columns (was: TypeError: 'module object is not
	callable')
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<mailman.315.1188810174.28954.python-list@python.org>
	<46dbd11e$0$6228$426a74cc@news.free.fr>
	<mailman.317.1188812089.28954.python-list@python.org>
	<1188816626.021956.281040@22g2000hsm.googlegroups.com>
	<5k2cjmF1r2aiU1@mid.uni-berlin.de>
	<1188836008.656284.76160@o80g2000hse.googlegroups.com>
	<46dc6f49$0$6207$426a34cc@news.free.fr>
	<1188900397.459760.259580@k79g2000hse.googlegroups.com>
	<slrnfdqe3t.i4p.hat@se-162.se.wtb.tue.nl>
Message-ID: <Xns99A17FAC2587duncanbooth@127.0.0.1>

"A.T.Hofkamp" <hat at se-162.se.wtb.tue.nl> wrote:

>> Each loop I perform, I get a new list of Strings.
>> I then want to print these lists as columns adjacent to each other
>> starting with the first
>> created list in the first column and last created list in the final
>> column.
> 
> Use zip:
> 
>>>> x = ['1', '2']
>>>> y = ['3', '4']
>>>> for row in zip(x,y):
> ...   print ', '.join(row)
> ...
> 1, 3
> 2, 4
> 
> 
> zip() constructs a list of rows, like
> 
> [('1', '3'), ('2', '4')]
> 
> which is then quite easy to print

But watch out if the lists aren't all the same length: zip won't pad out 
any sequences, so it may not be exactly what is wanted here:

>>> x = ['1', '2', '3']
>>> y = ['4', '5']
>>> for row in zip(x,y):
	print ', '.join(row)

	
1, 4
2, 5
>>> 


From bignose+hates-spam at benfinney.id.au  Wed Sep 19 22:12:27 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 20 Sep 2007 12:12:27 +1000
Subject: super() doesn't get superclass
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<1i4lvsx.mhw5621jlsd53N%aleax@mac.com>
	<87r6kwzg1h.fsf@benfinney.id.au>
	<13f3j83lun4ckc5@corp.supernews.com>
Message-ID: <87r6kuw0dw.fsf@benfinney.id.au>

Scott David Daniels <Scott.Daniels at Acm.Org> writes:

> Ben Finney wrote:
> > aleax at mac.com (Alex Martelli) writes:
> >
> >> In general, "a superclass of foo" means "a class X such that foo is a
> >> sublass of X"
> >
> > Sure. However, this doesn't equate to the assertion that "next class
> > in the MRO is the superclass", which is what I was responding to.
> >
> One thing not pointed out in this thread is that the chain of classes
> on the MRO starting with super(A, obj) _will_ include all superclasses
> of A.  That is the guarantee of the MRO, and that is why super is an
> appropriate name.

Yes, it does include those classes. The problem is it also includes an
unknown (to the implementation of A) number of classes that are *not*
superclasses of A. Thus, 'super' is a *bad* name for such a function.

-- 
 \            "There are always those who think they know what is your |
  `\       responsibility better than you do."  -- Ralph Waldo Emerson |
_o__)                                                                  |
Ben Finney


From kyosohma at gmail.com  Fri Sep  7 09:58:10 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 07 Sep 2007 13:58:10 -0000
Subject: Generating a unique identifier
In-Reply-To: <13e2fgbbpsatm39@corp.supernews.com>
References: <13e2fgbbpsatm39@corp.supernews.com>
Message-ID: <1189173490.461032.80480@k79g2000hse.googlegroups.com>

On Sep 7, 7:03 am, Steven D'Aprano <st... at REMOVE-THIS-
cybersource.com.au> wrote:
> I have an application that will be producing many instances, using them
> for a while, then tossing them away, and I want each one to have a unique
> identifier that won't be re-used for the lifetime of the Python session.
>
> I can't use the id() of the object, because that is only guaranteed to be
> unique during the lifetime of the object.
>
> For my application, it doesn't matter if the ids are predictable, so I
> could do something as simple as this:
>
> def unique_id():
>     n = 1234567890
>     while True:
>         yield n
>         n += 1
>
> unique_id = unique_id()
>
> while Application_Is_Running:
>     make_an_object(id=unique_id())
>     do_stuff_with_objects()
>     delete_some_of_them()
>
> which is easy enough, but I thought I'd check if there was an existing
> solution in the standard library that I missed. Also, for other
> applications, I might want them to be rather less predictable.
>
> --
> Steven.

You could always use the md5 module along with time.time() to generate
a unique id.

Mike



From dnhkng at googlemail.com  Thu Sep  6 01:47:06 2007
From: dnhkng at googlemail.com (Dr Mephesto)
Date: Thu, 06 Sep 2007 05:47:06 -0000
Subject: creating really big lists
In-Reply-To: <mailman.121.1189035929.2658.python-list@python.org>
References: <874pi92tr4.fsf@mulj.homelinux.net>
	<mailman.121.1189035929.2658.python-list@python.org>
Message-ID: <1189057626.943757.210420@d55g2000hsg.googlegroups.com>

On 6 Sep., 01:34, "Delaney, Timothy (Tim)" <tdela... at avaya.com> wrote:
> Hrvoje Niksic wrote:
> > Dr Mephesto <dnh... at googlemail.com> writes:
>
> >> I would like to create a pretty big list of lists; a list 3,000,000
> >> long, each entry containing 5 empty lists. My application will
> >> append data each of the 5 sublists, so they will be of varying
> >> lengths (so no arrays!).
>
> >> Does anyone know the most efficient way to do this? I have tried:
>
> >> list = [[[],[],[],[],[]] for _ in xrange(3000000)]
> > If you're building large data structures and don't need to reclaim
> > cyclical references, I suggest turning GC off, at least during
> > construction.
>
> This is good advice, but another question is whether you really want
> such a list. You may well be better off with a database of some kind -
> they're designed for manipulating large amounts of data.
>
> Tim Delaney

I need some real speed! a database is waaay to slow for the algorithm
im using. and because the sublists are of varying size, i dont think I
can use an array...



From garywlee at gmail.com  Mon Sep 17 02:04:37 2007
From: garywlee at gmail.com (GaryLee)
Date: Mon, 17 Sep 2007 06:04:37 -0000
Subject: Can't see the arguements when use Python in WSH.
In-Reply-To: <Xns99AD8FFD58F1Eduncanbooth@127.0.0.1>
References: <1189945728.024735.3960@w3g2000hsg.googlegroups.com>
	<Xns99AD8FFD58F1Eduncanbooth@127.0.0.1>
Message-ID: <1190009077.663473.201240@50g2000hsm.googlegroups.com>

On 9 16 ,   9 09 , Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> GaryLee <garyw... at gmail.com> wrote:
> > Does anyone have the same situation? Is it my pywin32 package
> > corrupted? I've downloaded the last pywin32 package and executed the
> > site-packages\win32comext\axscript\client\pyscript.py to register the
> > PyScript. But, the problem is still there.
>
> I've no idea why pyscript.py doesn't set up the registry correctly, but it
> should all work if you run the command:
>
>    ftype pysFile=%SystemRoot%\System32\WScript.exe "%1" %*
>
> (If you wish you can try "ftype pysFile" first to see the current setting.
> On my system the file association wasn't set at all but it sounds like on
> yours it may be set but missing the %*)

I am sure that my setting in registry is correct. After run ftype
pysFile, I got the following response.

    > ftype pysFile
    pysFile=%SystemRoot%\System32\WScript.exe "%1" %*

I've also checked the DropHandler setting in registry. The value is
correct.
I just don't want to re-install my python 2.4, because I've installed
too many package.



From saptarshi.guha at gmail.com  Tue Sep 18 20:39:47 2007
From: saptarshi.guha at gmail.com (sapsi)
Date: Tue, 18 Sep 2007 17:39:47 -0700
Subject: Sets in  Python
Message-ID: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>

Hello,
I recently tried using the set function in Python and was surprised to
find that

a=[ 1, 2,3, [1,2] ]

doesn't work with 'set', throwing TyperError (unhashable exception). I
found out that this is because lists can't be hashed.

So,this implies 'a' cannot be a set in python which i think is quite
unfortunate, after all 'a' does look like a mathematical set.

My question is,
1) Why can't lists be hashed?
and
2) This is not related, but is there i neat way (without pop and list
comprehension) to convert a set into a list? I say neat because i'm
guessing using list comprehension might turn out be slow and there
might be other methods which are faster.

Thank you for your time
SM



From deets at nospam.web.de  Sun Sep 16 07:17:31 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 16 Sep 2007 13:17:31 +0200
Subject: python 2.5 cElementTree entity troubles
In-Reply-To: <46EBF4D5.3080104@web.de>
References: <5l22jsF5taqoU1@mid.uni-berlin.de> <46EBEEFF.80106@web.de>
	<46EBF4D5.3080104@web.de>
Message-ID: <5l4hn2F6d3vsU1@mid.uni-berlin.de>

Stefan Behnel schrieb:
> Stefan Behnel wrote:
>> Diez B. Roggisch wrote:
>>> Any suggestions on how to teach the built-in ET-parser entities?
>> As you already do it in your code.
>>
>> http://effbot.org/elementtree/elementtree-xmlparser.htm#tag-ET.XMLParser.entity
> 
> Hmmm, I never needed this, but the test doesn't work for me either (with ET
> 1.3, Python 2.5.1). ET's parser uses the generic expat callback for entities,
> but it doesn't seem to get called for entities on my side... Looks like
> something's broken there.

I tried to go with explicit cElementTree and elementtree-installations - 
same problem....

Could this be a bug in the underlying python-shipped expat parser?

Diez


From george.sakkis at gmail.com  Thu Sep  6 22:50:39 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 07 Sep 2007 02:50:39 -0000
Subject: Text processing and file creation
In-Reply-To: <1189027060.889829.282510@r34g2000hsd.googlegroups.com>
References: <1189008809.718361.45790@g4g2000hsf.googlegroups.com>
	<1189024097.175349.221210@w3g2000hsg.googlegroups.com>
	<1189027060.889829.282510@r34g2000hsd.googlegroups.com>
Message-ID: <1189133439.559915.233350@19g2000hsx.googlegroups.com>

On Sep 5, 5:17 pm, "malibus... at gmail.com" <malibus... at gmail.com>
wrote:
> On Sep 5, 1:28 pm, Paddy <paddy3... at googlemail.com> wrote:
>
> > On Sep 5, 5:13 pm, "malibus... at gmail.com" <malibus... at gmail.com>
> > wrote:
>
> > > I have a text source file of about 20.000 lines.>From this file, I like to write the first 5 lines to a new file. Close
>
> > > that file, grab the next 5 lines write these to a new file... grabbing
> > > 5 lines and creating new files until processing of all 20.000 lines is
> > > done.
> > > Is there an efficient way to do this in Python?
> > > In advance, thanks for your help.
>
> > If its on unix: use split.
> > If its your homework: show us what you have so far...
>
> > - Paddy.
>
> Paddy,
>
> Thanks for making me aware of the (UNIX) split command (split -l 5
> inFile.txt), it's short, it's fast, it's beautiful.
>
> I am still wondering how to do this efficiently in Python (being kind
> of new to it... and it's not for homework).
>
> -- Martin.
>
> I am still wondering how to do this in Python (being new to Python)

If this was a code golf challenge, a decent entry (146 chars) could
be:

import itertools as it
for i,g in it.groupby(enumerate(open('input.txt')),lambda(i,_):i/
5):open("output.%d.txt"%i,'w').writelines(s for _,s in g)

or a bit less cryptically:

import itertools as it
for chunk,enum_lines in it.groupby(enumerate(open('input.txt')),
                                   lambda (i,line): i//5):
  open("output.%d.txt" % chunk, 'w').writelines(line for _,line
                                                in enum_lines)


George



From martin at v.loewis.de  Sat Sep 29 05:44:25 2007
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 29 Sep 2007 11:44:25 +0200
Subject: python 2.5 and 3gb switch
In-Reply-To: <fdl5lg$una$1@aioe.org>
References: <fdkan6$ne0$1@aioe.org> <fdkfqb$qr$1@daisy.noc.ucla.edu>
	<fdkq8g$vj2$1@aioe.org> <46FDF800.5030504@v.loewis.de>
	<fdl5lg$una$1@aioe.org>
Message-ID: <46fe1e79$0$2816$9b622d9e@news.freenet.de>

> This is where python gives 'memerror'. Although the space is there it wont 
> use it.

It's still not clear to me. Please be as precise and literal as you can
when reporting error messages. I very much doubt that Python outputs

memerror

at some point to the terminal; the string 'memerror' does not occur in
the entire Python source code. There are things in Python that have a
similar spelling, but again, please copy that spelling (and any
additional output that surrounds that text) literally, rather than
rephrasing it.

> I believe I should be using Python that is 3gb enabled as well

I'm not so sure about that, with your description right now. There might
be other reasons that cause that error (but they are hard to guess as
still still don't know exactly what the error is).

Regards,
Martin


From stefan.behnel-n05pAM at web.de  Wed Sep 26 03:27:15 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Wed, 26 Sep 2007 09:27:15 +0200
Subject: Python XML API's that preserve XML comments?
In-Reply-To: <pan.2007.09.26.00.58.55.406301@gmail.com>
References: <pan.2007.09.26.00.58.55.406301@gmail.com>
Message-ID: <46FA09D3.4080506@web.de>

Dan Stromberg wrote:
> Are there any python XML parsing API's that preserve comments -

Try lxml.

http://codespeak.net/lxml


> preferrably that come with python 2.5.1?

It doesn't come with Python 2.5.1, but it's compatible to ElementTree, which
is part of the stdlib. So you can have a fallback to the stdlib if lxml is not
installed (though this will loose comments then).

Stefan


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Sep 17 09:50:32 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 17 Sep 2007 15:50:32 +0200
Subject: simple regular expression problem
In-Reply-To: <1190034041.796626.66790@n39g2000hsh.googlegroups.com>
References: <1190034041.796626.66790@n39g2000hsh.googlegroups.com>
Message-ID: <46ee8628$0$31888$426a74cc@news.free.fr>

duikboot a ?crit :
> Hello,
> 
> I am trying to extract a list of strings from a text. I am looking it
> for hours now, googling didn't help either.
> Could you please help me?
> 
>>>> s = """ \n<organisatie>\n<Profiel_Id>28996</Profiel_Id>\n</organisatie>\n<organisatie>\n<Profiel_Id>28997</Profiel_Id>\n</organisatie>"""
>>>> regex = re.compile(r'<organisatie.*</organisatie>', re.S)
>>>> L = regex.findall(s)
>>>> print L
> ['organisatie>\n<Profiel_Id>28996</Profiel_Id>\n</organisatie>
> \n<organisatie>\n<Profiel_Id>28997</Profiel_Id>\n</organisatie']
> 
> I expected:
> [('organisatie>\n<Profiel_Id>28996</Profiel_Id>\n</organisatie>
> \n<organisatie>), (<organisatie>\n<Profiel_Id>28997</Profiel_Id>\n</
> organisatie')]
> 
> I must be missing something very obvious.

wrt/ regexp, Jason gave you the answer. Another point is that, when 
dealing with XML, it's sometime better to use an XML parser.

Q&D :

 >>> from xml.etree import ElementTree as ET
 >>> s = "<root>" + s + "</root>"
 >>> tree = ET.fromstring(s)
 >>> tree
<Element root at b795b2ac>
 >>> tree.findall("organisatie/Profiel_Id")
[<Element Profiel_Id at b795b32c>, <Element Profiel_Id at b795b3ec>]
 >>> _[0].text
'28996'
 >>> [it.text for it in tree.findall("organisatie/Profiel_Id")]
['28996', '28997']
 >>>

HTH



From skip at pobox.com  Sat Sep  1 14:28:02 2007
From: skip at pobox.com (skip at pobox.com)
Date: Sat, 1 Sep 2007 13:28:02 -0500
Subject: datetime.timedelta division confusion
Message-ID: <18137.44850.939462.817616@montanaro.dyndns.org>


Running from Subversion, I see confusing (to me) behavior related to
division of datetime.timedelta objects by integers:

    % python
    Python 2.6a0 (trunk:57277:57280M, Aug 28 2007, 17:44:49) 
    [GCC 4.0.1 (Apple Computer, Inc. build 5367)] on darwin
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import datetime
    >>> d = datetime.timedelta(1)
    >>> d / 2
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
    TypeError: unsupported operand type(s) for /: 'datetime.timedelta' and 'int'
    >>> d.__div__(2)
    datetime.timedelta(0, 43200)

When I run the interpreter under gdb's control with a breakpoint set in
delta_divide, the breakpoint is not reached in the first case, but it is in
the second.  Is there something amiss with division of timedelta objects by
ints or am I just missing something?

Skip



From evan at yelp.com  Tue Sep 25 12:01:46 2007
From: evan at yelp.com (Evan Klitzke)
Date: Tue, 25 Sep 2007 09:01:46 -0700
Subject: comparing elements of a list with a string
In-Reply-To: <1190734785.439839.303030@50g2000hsm.googlegroups.com>
References: <1190734785.439839.303030@50g2000hsm.googlegroups.com>
Message-ID: <1190736106.5564.14.camel@thinkpad>

On Tue, 2007-09-25 at 08:39 -0700, Shriphani wrote:
> Hello all,
> I have a problem here. I have a list named list_of_files which
> contains filenames with their timestamps attached to the name. If I
> have a string "fstab", and I want to list out the files in whose names
> the word fstab appears should I go about like this :
> 
> def listAllbackups(file):
>     list_of_files = os.listdir("/home/shriphani/backupdir")
>     for element in list_of_files:
>          if element.find(file) != -1:
>              date = ###
>              time = ####
>               return (date, time)
> 
> The major trouble is that the return statement causes it to exit after
> attempt one. How do I use the yield statement here?

You can just replace the return statement with a yield statement,
nothing fancy is required. Also, as long as you're using the string.find
method to search for the file, I'd replace it with "if file in element",
which is a bit more idiomatic.

-- 
Evan Klitzke <evan at yelp.com>



From alpha04 at netvigator.com  Wed Sep 12 00:17:21 2007
From: alpha04 at netvigator.com (Andrey)
Date: Tue, 11 Sep 2007 21:17:21 -0700
Subject: 2 daemons write to a single file /w python file IO
Message-ID: <fc7p9i$1rr$1@sea.gmane.org>

HI

i have a newbie question about the file() function.
I have 2 daemons running on my linux box.

1 will record the IDs to a file - logs.txt
other 1 will open this file, read the IDs, and then "Clean up the 
file" -logs.txt

Since these 2 daemons will run every 2-5mins, I think this will crash, isn't 
it? When both daemons try to write to the file at the same time.

I am wondering if this won't crash, OR if there is some simple high-level 
functions can lock the file while writing...
I also wonder if one side locked the file, what happens if the other side 
try to open this locked file? raise error? so i also need to write a loop to 
wait for the file to release locking?

seems a basic easy thing but i just cannot find an simple answer.
I always advoid this issue by putting them in mysql (well, fast and hassle 
free for locking)

Thanks
Jay





From grflanagan at yahoo.co.uk  Tue Sep 25 02:37:09 2007
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: Mon, 24 Sep 2007 23:37:09 -0700
Subject: Making a small change to a large XML document
In-Reply-To: <pan.2007.09.24.22.38.37.790708@gmail.com>
References: <pan.2007.09.24.22.38.37.790708@gmail.com>
Message-ID: <1190702229.813088.236100@o80g2000hse.googlegroups.com>

On Sep 25, 12:38 am, Dan Stromberg <dstrombergli... at gmail.com> wrote:
> Say I want to take an existing XML document, and change the value="9997"
> and value="9998" to two different numbers, without changing any of the
> rest of the document - not even changing comments or indentation, if
> avoidable.
>
> What's the best way of doing it in python?
>
>   <bean id="cs" class="c.d.q.s.C">
>     <property name="p" value="9997"/>
>     <property name="mP" value="9998"/>
>     <property name="g" value="cs"/>
>     <property name="e" value="t"/>
>   </bean>
>
> My .xml file is full of such beans.
>
> I've played around with minidom a little in the past, and I'm targetting
> python 2.5.1.
>
> Thanks!

With ElementTree (from xml.etree import ElementTree) and the 'replace'
and 'sub' functions here:

  http://gflanagan.net/site/python/utils/elementfilter/elementfilter.py

(Some improvements to ElementTree:

  http://effbot.org/zone/elementtree-13-intro.htm

)

Gerard



From gnewsg at gmail.com  Mon Sep 10 11:38:27 2007
From: gnewsg at gmail.com (billiejoex)
Date: Mon, 10 Sep 2007 08:38:27 -0700
Subject: How can I test 'warnings' from testsuite?
In-Reply-To: <1189437319.084730.12300@k79g2000hse.googlegroups.com>
References: <1189433313.296787.166060@22g2000hsm.googlegroups.com>
	<1189437319.084730.12300@k79g2000hse.googlegroups.com>
Message-ID: <1189438707.543278.299480@r34g2000hsd.googlegroups.com>

On 10 Set, 17:15, "attn.steven.... at gmail.com"
<attn.steven.... at gmail.com> wrote:
> On Sep 10, 7:08 am, billiejoex <gne... at gmail.com> wrote:
>
> > Hi there,
> > into a module of mine I 'warn' a message if a certain situation
> > occurs:
>
> > def add_anonymous_user(permissions=('r'):
> >       if 'w' in p:
> >           import warnings
> >           warnings.warn("it's not rencommended assigning 'w'
> > permission to anonymous user.", RuntimeWarning, stacklevel=2)
>
> > I'd like to test such event from test suite ("fail test if warn is not
> > raised") but don't know how.
>
> > Any suggestion?
>
> You can (temporarily) change warnings to exceptions
> for the purposes of testing; see filterwarnings in
> the warnings module.  E.g.,
>
> import warnings
> import unittest
>
> def foo():
>     warnings.warn("Foo", RuntimeWarning, stacklevel=2)
>
> class testWarn(unittest.TestCase):
>     def setUp(self):
>         warnings.filterwarnings("error")
>     def test_1(self):
>         self.assertRaises(RuntimeWarning, foo)
>     def tearDown(self):
>         warnings.resetwarnings()
>
> s = unittest.TestSuite()
> s.addTest(unittest.makeSuite(testWarn))
>
> if __name__ == '__main__':
>     import sys
>     sys.argv.append('-v')
>     unittest.TextTestRunner(verbosity=2).run(s)
>
> --
> Hope this helps,
> Steven

This is exactly what I was searching for.
Thank you very much.



From joshua at eeinternet.com  Wed Sep 26 18:23:30 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Wed, 26 Sep 2007 14:23:30 -0800
Subject: GUI for viewing/editing python data structures?
Message-ID: <fdem52$gl6$1@sea.gmane.org>

A while back, I seem to remember coming across a small program that could
view and edit python data structures via a nice expanding tree view.  I'm
now in need of something like that (to verify data is imported correctly
into a shelve file) and having a GUI would be much simpler than trying to
wade through the output of str(d) or repr(d).

I've tried googling with the obvious keywords (gui (view OR edit) python
data structures) but t didn't get me anywhere.

Pointers?

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE



From xkenneth at gmail.com  Fri Sep  7 12:38:08 2007
From: xkenneth at gmail.com (xkenneth)
Date: Fri, 07 Sep 2007 16:38:08 -0000
Subject: Organizing Code - Packages
In-Reply-To: <46e17143$0$6189$426a74cc@news.free.fr>
References: <1189177596.960379.244990@w3g2000hsg.googlegroups.com>
	<46e17143$0$6189$426a74cc@news.free.fr>
Message-ID: <1189183088.922537.18290@r34g2000hsd.googlegroups.com>


> Ah, yes, a couple of things:
> - avoid the 'one-class-per-file' syndrom. It's perfectly ok to have tens

Yes but i find it hard to edit classes easily when I have more than
one class per file.

Regards,
Ken



From rainwatching at gmail.com  Thu Sep  6 07:13:29 2007
From: rainwatching at gmail.com (=?iso-8859-1?q?S=F6nmez_Kartal?=)
Date: Thu, 06 Sep 2007 11:13:29 -0000
Subject: reload(sys)
In-Reply-To: <b4GdnYMUSPu56UbbnZ2dnUVZ_u2mnZ2d@comcast.com>
References: <1188521143.421431.119100@l22g2000prc.googlegroups.com>
	<JK2dnSgydPkg8ErbnZ2dnUVZ_u3inZ2d@comcast.com>
	<1188564816.430863.219560@w3g2000hsg.googlegroups.com>
	<f8GdnZ-6HbH-1kXbnZ2dnUVZ_s3inZ2d@comcast.com>
	<1188662049.337034.58220@w3g2000hsg.googlegroups.com>
	<b4GdnYMUSPu56UbbnZ2dnUVZ_u2mnZ2d@comcast.com>
Message-ID: <1189077209.646830.111990@19g2000hsx.googlegroups.com>

On 3 Eyl?l, 05:40, Steven Bethard <steven.beth... at gmail.com> wrote:
> S?nmez Kartal wrote:
> > I was using the XMLBuilder(xmlbuilder.py). I'm writing XML files as
> > "f.write(str(xml))". At execution of that line, it gives error with
> > description, configure your default encoding...
>
> [and later]
>
> > I get this when it happens: "Decoding Error: You must configure
> > default encoding" which comes from in the code excerpt in
> > xmlbuilder.py (http://rafb.net/p/9rURi822.html)
>
> Can you show the code where you populate the XMLBuilder? I'm guessing
> you're doing something like::
>
>      import xmlbuilder
>      builder = xmlbuilder.XMLBuilder()
>      builder.foo = dict(bar='? and ?')
>      str(builder)
>
> That breaks because the string '? and ?' is not properly encoded. Have
> you declared an encoding in your source file? PEP 263 shows you how:
>
>      http://www.python.org/dev/peps/pep-0263/
>
> Note that with Python 2.5 the code above gives a SyntaxError without a
> proper encoding. You should also probably be prefixing your string
> literals containing weird characters with "u" to make them unicode.
> Doing both of these in the code above made it work for me.
>
> STeVe

http://rafb.net/p/RfaF8215.html

products in the code is a list of dictionaries which are returned by
makeProduct function.

I'm not typing or pasting those characters into my script. So,
declaring an encoding didn't make it. :-( But, your code excerpt
runned well.

I have tried "f.write(unicode(xml))" for the last line of the script.
No success.

I think we should think about how we can achieve the effect of
"sys.setdefaultencoding('utf-8')"



From ebouvier at jetmultimedia.fr  Thu Sep 27 12:38:24 2007
From: ebouvier at jetmultimedia.fr (Eric BOUVIER)
Date: Thu, 27 Sep 2007 18:38:24 +0200
Subject: Pb with an AttributeError
In-Reply-To: <676224240709270915x537a6426h1512cbddccb5c68f@mail.gmail.com>
Message-ID: <FFC5D92B345ADD428B11AA3943023F3004176B03@BARDEAU.hmc.jet>

 Thanks, 

I find the "type" function and effectively the type is a dict. 
I didn't know this type before !  :-}

The program normally try to get the value of SP between the <> 
in the string1. Here, it's 136. 
The string1 is normally longer and had a lot of "<value>" but only one 
with "<value>=".

I find str() and applied it to tranform the type 'dict' in a sting type.
Thus, I arrived to get "136" with regular expression.

   Thanks


> -----Message d'origine-----
> De : Nathan Harmston [mailto:ratchetgrid at googlemail.com] 
> Envoy? : jeudi 27 septembre 2007 18:16
> ? : Eric BOUVIER
> Cc : python-list at python.org
> Objet : Re: Pb with an AttributeError
> 
> Hi,
> 
> I m not sure what your trying to do, but this is where your 
> problem is:
> 
> string1 is not a string it is actually a dict because of your eval.
> When you call
> string1["param"] inside the string.split()
> 
> it is returning a dictionary and not a string....
> 'param': {'key': 'SP<136>=', 'value': ['SD:<0> ']}
> 
> since {'key': 'SP<136>=', 'value': ['SD:<0> ']} is inside curly
> brackets it is a dictionary.
> 
> I still dont get what your trying to have as your final result, but
> hope this helps.
> 
> Thanks
> 
> Nathan
> 
> On 27/09/2007, Eric BOUVIER <ebouvier at jetmultimedia.fr> wrote:
> >
> >
> >
> > Hello,
> >
> > First, sorry for my english.
> >
> > I've just been assigned a project written in Python which 
> contains bug(s).
> > I've never programmed in Python, but I've read the code
> > and understood basically what the different source codes do.
> >
> > I've traced the code and found where the problem is but I don't
> > know how to solve the problem.
> >
> > Here it is :
> >
> > I've got a string issued from a CSV file :
> >    string1 = eval(line[4])
> >    print " * string1 = (", string1 ,") \n"
> >         =>  * string1 = ( {'header': 'X-Score', 'param': 
> {'key': 'SP<136>=',
> > 'value': ['SD:<0> ']} )
> >
> > Then, there is a split with the equal :
> >    TheParts = string.split(string1["param"], "=")
> >    print " * TheParts = (", TheParts ,") \n"
> >
> > But, running the program returns :
> >
> > Traceback (most recent call last):
> >   File "C:\test\helper.py", line 136, in Action_handler
> >     Score_eval(line, OutputFile_SP, This_Host)
> >   File "C:\test\helper.py", line 66, in Score_eval
> >     TheParts = string.split(string1["param"], "=")
> >   File "C:\ActiveState\Python25\lib\string.py", line 290,
> > in split
> >     return s.split(sep, maxsplit)
> > AttributeError: 'dict' object has no attribute 'split'  !?!
> >
> > I've found that it works when I put directly the string in the split
> > expression :
> >
> >    TheParts = string.split(" {'key': 'ESP<136>=', 'value': 
> ['SHA:<0> ']} ",
> > "=")
> >       => * TheParts =   ["{'key': 'ESP<136>", "', 'value': 
> ['SHA:<0> ']}"]
> >
> >   But the code isn't dynamic anymore !
> > I think it's a problem with the type, but the different 
> syntax I've tried
> > didn't work.
> > Is somebody could help me ?
> >
> >  Thank you
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
> 


From cmr.Pent at gmail.com  Thu Sep 13 02:23:58 2007
From: cmr.Pent at gmail.com (cmr.Pent at gmail.com)
Date: Wed, 12 Sep 2007 23:23:58 -0700
Subject: need scsh in a wikip article
In-Reply-To: <46e7b20d.4115317@news.readfreenews.net>
References: <1189563310.268611.4550@r34g2000hsd.googlegroups.com>
	<1189568488.932657.129510@o80g2000hse.googlegroups.com>
	<1189588209.836060.46920@50g2000hsm.googlegroups.com>
	<46e7b20d.4115317@news.readfreenews.net>
Message-ID: <1189664638.579309.263770@g4g2000hsf.googlegroups.com>

On 12 ????, 13:32, g... at mail.ru (Timofei Shatrov) wrote:
> On Wed, 12 Sep 2007 02:10:09 -0700, "cmr.P... at gmail.com" <cmr.P... at gmail.com>
> tried to confuse everyone with this message:
>
> >> someone please add scsh there.
>
> >Why can't YOU add scsh or I am missing something??
>
> Maybe he is banned?
>

Huh, that sounds reasonable.

Andrey



From robert.kern at gmail.com  Mon Sep 10 16:11:46 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 10 Sep 2007 15:11:46 -0500
Subject: noob: reloading modified python file within Python Shell
In-Reply-To: <1189450434.578698.286760@o80g2000hse.googlegroups.com>
References: <1189450434.578698.286760@o80g2000hse.googlegroups.com>
Message-ID: <fc48ea$o4m$1@sea.gmane.org>

johnny wrote:
> from people.models import *
> 
> Now I make changes to the models.py.  How do I reload this module in
> Python Shell?

import people.models
reload(people.models)
from people.models import *

-- 
Robert Kern

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



From michele.simionato at gmail.com  Wed Sep  5 06:42:23 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Wed, 5 Sep 2007 12:42:23 +0200
Subject: doctest and decorators
In-Reply-To: <2bfa72fa0709050320o65dc2d62u854799833bce665e@mail.gmail.com>
References: <2bfa72fa0709041329i14b5b547i2eb85250f7547da@mail.gmail.com>
	<200709042316.08263.python@cx.hu>
	<2bfa72fa0709041452o72d9a98fp939852d061a2cda3@mail.gmail.com>
	<200709050009.46380.python@cx.hu>
	<2bfa72fa0709041529g9d5ac22hce3a55d5357b1a1c@mail.gmail.com>
	<mailman.56.1188949595.2658.python-list@python.org>
	<1188970537.297655.256600@r34g2000hsd.googlegroups.com>
	<2bfa72fa0709050320o65dc2d62u854799833bce665e@mail.gmail.com>
Message-ID: <4edc17eb0709050342v5d51299am22b18ff46698a7c8@mail.gmail.com>

On 9/5/07, Daniel Larsson <daniel.j.larsson at gmail.com> wrote:
>  Here's my two files again:
>
>  # decorator.py
>  import functools
>
>  def simplelog(f):
>      @functools.wraps(f)
>      def new_f(*args, **kwds):
>          print "Wrapper calling func"
>          return f(*args, **kwds)
>      return new_f
>
>  # test.py
>  from decorator import simplelog
>
>  @simplelog
>  def test():
>      """
>     This test should fail, since the decorator prints output. Seems I don't
> get called though
>      >>> test()
>      'works!'
>      """
>      return "works!"
>
>  if __name__ == '__main__':
>      import doctest
>      doctest.testmod()
>

Ok, I could not see the code before (Google groups as getting worse as
the time goes by).  It looks like you are right, it is a bug in
doctest.

    Michele Simionato


From bj_666 at gmx.net  Sat Sep 22 19:04:42 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 22 Sep 2007 23:04:42 GMT
Subject: Getting rid of bitwise operators in Python 3?
References: <46f49740$0$32514$4c368faf@roadrunner.com>
	<miaJi.28220$eY.3184@newssvr13.news.prodigy.net>
	<1190484589.890198.266430@y42g2000hsy.googlegroups.com>
	<SDfJi.54712$YL5.36046@newssvr29.news.prodigy.net>
Message-ID: <5lllcaF8gic1U12@mid.uni-berlin.de>

On Sat, 22 Sep 2007 21:17:38 +0000, Bryan Olson wrote:

> The operator module offers pow(). Is there any good reason for
> pow() as a built-in?

The `operator.pow()` is  just the function for ``**``, it lacks the
optional third argument of the built in `pow()`.

Ciao,
	Marc 'BlackJack' Rintsch


From jgardner.jonathangardner.net at gmail.com  Mon Sep 10 19:05:38 2007
From: jgardner.jonathangardner.net at gmail.com (Jonathan Gardner)
Date: Mon, 10 Sep 2007 23:05:38 -0000
Subject: getting the current function
In-Reply-To: <mailman.229.1189182388.2658.python-list@python.org>
References: <mailman.229.1189182388.2658.python-list@python.org>
Message-ID: <1189465538.120047.16020@19g2000hsx.googlegroups.com>

On Sep 7, 9:19 am, Gary Robinson <gary... at mac.com> wrote:
> > This all seems a bit too complicated. Are you sure you want to do
> > this? Maybe you need to step back and rethink your problem.
>
> In version 2.1 Python added the ability to add function attributes -- seehttp://www.python.org/dev/peps/pep-0232/for the justifications. A counter probably isn't one of them, I just used that as a quick example of using thisfunc().
>
> I've just never liked the fact that you have to name the function when accessing those attributes from within the function. And I thought there might be other uses for something like thisfunc().
>

If I had a scenario where I needed a function that would change its
behavior based on its attributes I would use an object instead. If I
really, really needed it to behave like a function, then I would
override __call__.

Using a function's attributes to modify its behavior seems like using
a singleton or a module variable to modify the behavior of functions.
I would avoid it if I wanted to write code that someone else
(including myself) may want to use one day. Otherwise, it would be
hard to keep different bits of code separate from one another.




From martijn at gamecreators.nl  Wed Sep 19 11:02:57 2007
From: martijn at gamecreators.nl (martijn at gamecreators.nl)
Date: Wed, 19 Sep 2007 08:02:57 -0700
Subject: still get a <defunct> using a python script in the crontab
In-Reply-To: <1190213457.663885.313330@k35g2000prh.googlegroups.com>
References: <1190196137.140718.198510@n39g2000hsh.googlegroups.com>
	<1190213457.663885.313330@k35g2000prh.googlegroups.com>
Message-ID: <1190214177.505110.261120@57g2000hsv.googlegroups.com>

On 19 sep, 16:50, Zentrader <zentrad... at gmail.com> wrote:
> > If I run the command /usr/sbin/program_prgchk everything works (no
> > <defunct> process)
> > But when I use it in the crontab I get a <defunct> process
>
> The crontabs file on my system is stored in /var/spool/cron/
> crontabs/.  It appears you are checking the wrong file.  Try a
> "crontab -e" from the command line and compare it to the contents in
> the /etc/crontab file.

The crontab is working because I can see that he started the
os.system('/usr/sbin/program_reseller') AND a <defunct> process (what
I can only kill by killing the '/usr/sbin/program_reseller'



From aleax at mac.com  Sun Sep  2 13:13:05 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 2 Sep 2007 10:13:05 -0700
Subject: code check for modifying sequence while iterating over it?
References: <mailman.233.1188587597.28954.python-list@python.org>
Message-ID: <1i3t59h.1cywbfkgommpbN%aleax@mac.com>

Neal Becker <ndbecker2 at gmail.com> wrote:

> After just getting bitten by this error, I wonder if any pylint, pychecker
> variant can detect this error?

I know pychecker can't (and I doubt pylint can, but I can't download the
latest version to check as logilab's website is temporarily down for
maintenance right now).  It's a very thorny problem to detect a
reasonable subset of likely occurrences of this bug by static analysis
only, i.e., without running the code:-(


Alex


From iclark at mail.ewu.edu  Thu Sep 13 12:14:42 2007
From: iclark at mail.ewu.edu (Ian Clark)
Date: Thu, 13 Sep 2007 09:14:42 -0700
Subject: recursion
In-Reply-To: <slrnfeinvk.1cc.horpner@FIAD06.norwich.edu>
References: <fcbfnj$lh4$1@ss408.t-com.hr>
	<slrnfeinvk.1cc.horpner@FIAD06.norwich.edu>
Message-ID: <fcbnli$jlg$1@sea.gmane.org>

Neil Cerutti wrote:
> On 2007-09-13, Gigs_ <gigs at hi.t-com.hr> wrote:
>> Can someone explain me this
>>
>>>>> def f(l):
>> 	if l == []:
>> 		return []
>> 	else:
>> 		return f(l[1:]) + l[:1]  # <= cant figure this, how is all sum at the end?
> 
> In plain English, the above program says:
> 
> The sum of the items in list l is zero if the list is empty.
> Otherwise, the sum is the value of the first item plus the sum of
> the rest of the items in the list.

Am I missing something? What does this have to do with summing?

     >>> def f(l):
     ...     if l == []:
     ...         return []
     ...     else:
     ...         return f(l[1:]) + l[:1]
     ...
     >>> f([1, 2, 3, 4])
     [4, 3, 2, 1]

Ian



From johnzenger at gmail.com  Sat Sep  8 17:04:55 2007
From: johnzenger at gmail.com (John Zenger)
Date: Sat, 08 Sep 2007 14:04:55 -0700
Subject: Spell-checking Python source code
Message-ID: <1189285495.185657.88010@o80g2000hse.googlegroups.com>

To my horror, someone pointed out to me yesterday that a web app I
wrote has been prominently displaying a misspelled word.  The word was
buried in my code.

Is there a utility out there that will help spell-check literal
strings entered into Python source code?  I don't mean spell-check
strings entered by the user; I mean, go through the .py file, isolate
strings, and tell me when the strings contain misspelled words.  In an
ideal world, my IDE would do this with a red wavy line.

I guess a second-best thing would be an easy technique to open a .py
file and isolate all strings in it.

(I know that the better practice is to isolate user-displayed strings
from the code, but in this case that just didn't happen.)



From horpner at yahoo.com  Thu Sep 20 13:03:02 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 20 Sep 2007 17:03:02 GMT
Subject: Sets in Python
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
	<CeB*qHeVr@news.chiark.greenend.org.uk>
	<1190235483.412972.81280@v23g2000prn.googlegroups.com>
	<1190239608.835359.51150@22g2000hsm.googlegroups.com>
	<1190244370.741482.6540@y27g2000pre.googlegroups.com>
	<1190247922.835055.31950@y42g2000hsy.googlegroups.com>
	<1190259968.214528.158370@v29g2000prd.googlegroups.com>
	<5lel9rF7r3c0U1@mid.uni-berlin.de>
Message-ID: <slrnff5629.1do.horpner@FIAD06.norwich.edu>

On 2007-09-20, Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:
>> In the new model, it should be the value at the time of
>> addition. That is [1,2] (not [1,2,3]). This does mean a copy
>> of key in maintained internally in the dict.
>
> A copy!?  That has to be a deep copy.  Which would make
> `dict`\s alot slower and use more memory.  Plus you can't store
> objects that can't be copied anymore.  That doesn't sound like
> a good trade off to me.

Python's dict implementation is so deeply unorthoganal (is that a
word?) to Python's basic assignment semantics and clever type
hierarchy that it's hard to even sensibly promote anything other
than the current implementation without completely redesigning
Python.

-- 
Neil Cerutti


From zzbbaadd at aol.com  Mon Sep 10 22:38:08 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Mon, 10 Sep 2007 19:38:08 -0700
Subject: Enum class with ToString functionality
In-Reply-To: <87sl5m7xxm.fsf@benfinney.id.au>
References: <1189416537.050002.61120@r34g2000hsd.googlegroups.com>
	<87bqca9hrw.fsf@benfinney.id.au>
	<1189472591.797327.189180@w3g2000hsg.googlegroups.com>
	<87sl5m7xxm.fsf@benfinney.id.au>
Message-ID: <1189478288.237609.25140@50g2000hsm.googlegroups.com>

On Sep 10, 7:12 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> TheFlyingDutchman <zzbba... at aol.com> writes:
> > >     <URL:http://cheeseshop.python.org/pypi/enum/>
>
> (Please preserve attribution lines so it's clear who wrote what.)
>
> > Looking at the documentation it looks excellent. But I don't
> > understand the 0.4.2 version number,
>
> Note the tag that says the "Development Status" is "Beta".
>
> > particularly when you refer to it as robust.
>
> I assume you're referring to the short description, "Robust enumerated
> type support in Python".
>
> That refers to the implemented type as robust, not the state of the
> code. That is, the short description should be read as "Support, in
> Python, for robust enumerated types". It's a description of the
> package functionality.
>
> If, of course, the state of the code is not robust, that's a bug that
> needs to be fixed; but that's true for any package.
>
> --
>  \     "Try to become not a man of success, but try rather to become a |
>   `\                                   man of value." -Albert Einstein |
> _o__)                                                                  |
> Ben Finney

What is the difference between this version and the 1.0 version?



From orsenthil at gmail.com  Wed Sep  5 11:48:39 2007
From: orsenthil at gmail.com (O.R.Senthil Kumaran)
Date: Wed, 5 Sep 2007 21:18:39 +0530
Subject: Checking if elements are empty
In-Reply-To: <fbme5d$qa$1@sea.gmane.org>
References: <2323A6D37908A847A7C32F1E3662C80E010A0246@dc1ex01.air.org>
	<fbme5d$qa$1@sea.gmane.org>
Message-ID: <20070905154839.GE3437@gmail.com>

> Doran, Harold wrote:
> 
> I presume you meant
> 
> x = '  \t\'ff'
> 
> 
> > Is there a way to check if the first element of y is null?
> > 

You can use startswith() method of string objects.

if x.startswith(' '):
	print True


-- 
O.R.Senthil Kumaran
http://uthcode.sarovar.org


From stef.mientki at gmail.com  Fri Sep 14 16:21:13 2007
From: stef.mientki at gmail.com (stef mientki)
Date: Fri, 14 Sep 2007 22:21:13 +0200
Subject: why does Configparser change names to lowercase ?
Message-ID: <46EAED39.9080209@gmail.com>

hello,

Why does  Configparser change names to lowercase ?

As Python is case sensitive (which btw I don't like at all ;-)
but now when really need the casesensitivity,
because it handles about names which should be recognized by human,
it changes everything to lowercase ????

thanks,
Stef Mientki




From zzbbaadd at aol.com  Wed Sep 19 18:59:59 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Wed, 19 Sep 2007 15:59:59 -0700
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
In-Reply-To: <1190241711.344058.238380@57g2000hsv.googlegroups.com>
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<dea92f560709021735l2c72d53ew94410fcb33b9b50b@mail.gmail.com>
	<mailman.303.1188779927.28954.python-list@python.org>
	<1190164166.378500.155990@o80g2000hse.googlegroups.com>
	<1190241711.344058.238380@57g2000hsv.googlegroups.com>
Message-ID: <1190242799.954176.279440@22g2000hsm.googlegroups.com>

On Sep 19, 3:41 pm, Paul Boddie <p... at boddie.org.uk> wrote:
> On 19 Sep, 03:09, TheFlyingDutchman <zzbba... at aol.com> wrote:
>
>
>
> > How much faster/slower would Greg Stein's code be on today's
> > processors versus CPython running on the processors of the late
> > 1990's? And if you decide to answer, please add a true/false response
> > to this statement - "CPython in the late 1990's ran too slow".
>
> Too slow for what? And what's the fixation with CPython, anyway? Other
> implementations of Python 2.x don't have the GIL. Contrary to popular
> folklore, Jython has been quite a reasonable implementation of Python
> for about half as long as CPython has been around, if you don't mind
> the JVM. I'm sure people have lots of complaints about Jython like
> they do about CPython and the GIL, thinking that complaining about it
> is going to make the situation better, or that they're imparting some
> kind of "wisdom" to which the people who actually wrote the code must
> be oblivious, but nobody is withholding the code from anyone who wants
> to actually improve it.

>
> And there we learn something: that plenty of people are willing to
> prod others into providing them with something that will make their
> lives better, their jobs easier, and their profits greater, but not so
> many are interested in contributing back to the cause and taking on
> very much of the work themselves. Anyway, the response to your
> statement is "false". Now you'll have to provide us with the insight
> we're all missing. Don't disappoint!
>
> Paul

Paul it's a pleasure to see that you are not entirely against
complaints.

The very fastest Intel processor of the last 1990's that I found came
out in October 1999 and had a speed around 783Mhz. Current fastest
processors are something like 3.74 Ghz, with larger caches. Memory is
also faster and larger. It appears that someone running a non-GIL
implementation of CPython today would have significantly faster
performance than a GIL CPython implementation of the late 1990's.
Correct me if I am wrong, but it seems that saying non-GIL CPython is
too slow, while once valid, has become invalid due to the increase in
computing power that has taken place.



From xkenneth at gmail.com  Wed Sep 12 15:51:44 2007
From: xkenneth at gmail.com (xkenneth)
Date: Wed, 12 Sep 2007 12:51:44 -0700
Subject: xmlrpclib and SimpleXMLRPCServer questions
Message-ID: <1189626704.033328.9500@k79g2000hse.googlegroups.com>

So i've been trying to set up a simple server and client through
XMLRPC in python.

Here's my code:

SERVER

import SimpleXMLRPCServer


class DataServer:
    def __init__(self):
        pass

    def test(self,test):
        self.this = test

    def show(self):
        print self.this

server = SimpleXMLRPCServer.SimpleXMLRPCServer(("localhost", 8005))
server.register_instance(DataServer())
server.serve_forever()

CLIENT
import xmlrpclib
server = xmlrpclib.Server('http://localhost:8005')
server.test(5)
server.show()


Now, I'm getting the most odd callback from the client side:

>>> server.show()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.4/
lib/python2.4/xmlrpclib.py", line 1096, in __call__
    return self.__send(self.__name, args)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.4/
lib/python2.4/xmlrpclib.py", line 1383, in __request
    verbose=self.__verbose
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.4/
lib/python2.4/xmlrpclib.py", line 1147, in request
    return self._parse_response(h.getfile(), sock)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.4/
lib/python2.4/xmlrpclib.py", line 1286, in _parse_response
    return u.close()
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.4/
lib/python2.4/xmlrpclib.py", line 744, in close
    raise Fault(**self._stack[0])
xmlrpclib.Fault: <Fault 1: 'exceptions.TypeError:cannot marshal None
unless allow_none is enabled'>

What is causing this? The server recieves the data and seems to
respond properly regardless of this error, so by all means i can
always catch it, but that sounds stupid.

Here I can verify the server process is indeed recieving the data
(calling the client with two different values):

localhost - - [12/Sep/2007 14:35:18] "POST /RPC2 HTTP/1.0" 200 -
5
localhost - - [12/Sep/2007 14:35:41] "POST /RPC2 HTTP/1.0" 200 -
10

Looking at the documentation:

class SimpleXMLRPCServer(	addr[, requestHandler[,
logRequests[allow_none[, encoding]]]])

I'm not sure how to specify the allow_none value or it's type, how can
i find out more?

Thanks for the help!

Regards,
Ken



From steve at holdenweb.com  Tue Sep 18 09:32:45 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 18 Sep 2007 09:32:45 -0400
Subject: adodb with mysql - connection string syntax for filepath
In-Reply-To: <33dffc910709180023w42471f33n5bd76f8b02f40930@mail.gmail.com>
References: <33dffc910709162342x49657895t938fb1f8af2834de@mail.gmail.com>
	<33dffc910709180023w42471f33n5bd76f8b02f40930@mail.gmail.com>
Message-ID: <fcok1r$l9$2@sea.gmane.org>

Mridula Ramesh wrote:
> Hi. Firstly, thank you both very much for the response!
> 
> Cliff, I did some more reading up about it after  you corrected me re 
> MySQL not being a _language_  but another means of storing data (would 
> you believe NONE of the connection tutorials actually said that?!) 
> Anyway, now I have MySQL on my machine, and it's installed - if I say 
> "import MySQLdb" in python prompt, it does that, but I can't see any exe 
> in the program's folder itself: does that mean tables can only be 
> created by code? *puzzled*
> 
> Steve, thank you too, I looked up the link you had given, but I do not 
> yet know which part of that site may help me... And I am now going to 
> struggle with Dive Into Python before attempting much else!
> 
> This is a nice, helpful mailing group!
> 
We try, though not everyone appreciates us :-)

You may find

   http://www.connectionstrings.com/

more helpful.

regard
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From nanjundi at gmail.com  Thu Sep 27 15:33:04 2007
From: nanjundi at gmail.com (Nanjundi)
Date: Thu, 27 Sep 2007 19:33:04 -0000
Subject: getopt with negative numbers?
In-Reply-To: <fdgpic$ssu$00$1@news.t-online.com>
References: <1190913250.198794.269530@k79g2000hse.googlegroups.com>
	<fdgpic$ssu$00$1@news.t-online.com>
Message-ID: <1190921584.071884.155460@o80g2000hse.googlegroups.com>

On Sep 27, 1:34 pm, Peter Otten <__pete... at web.de> wrote:
...
> >>> args
>
> ['-123']
>
> Without the "--" arg you will get an error:
>
> >>> parser.parse_args(["-123"])
>
> Usage:  [options]
>
> : error: no such option: -1
> $
>
> Peter

Passing -a-123 works
>>> options, args = parser.parse_args(["-a-123"])
>>> options.a
-123

-N



From bignose+hates-spam at benfinney.id.au  Fri Sep 28 18:19:34 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 29 Sep 2007 08:19:34 +1000
Subject: getopt with negative numbers?
References: <1190913250.198794.269530@k79g2000hse.googlegroups.com>
	<fdgpic$ssu$00$1@news.t-online.com>
	<1190915197.390247.313590@57g2000hsv.googlegroups.com>
	<fdgri5$ssu$00$2@news.t-online.com>
	<mailman.1182.1190917341.2658.python-list@python.org>
	<1190930134.780005.68510@22g2000hsm.googlegroups.com>
	<mailman.1196.1190937544.2658.python-list@python.org>
	<1190944143.521085.66910@g4g2000hsf.googlegroups.com>
	<871wcj4ib9.fsf@benfinney.id.au>
	<1190999036.588941.165610@g4g2000hsf.googlegroups.com>
	<GdednaFCqLj6oGDbnZ2dnUVZ_g6dnZ2d@comcast.com>
Message-ID: <87odfm3021.fsf@benfinney.id.au>

Steven Bethard <steven.bethard at gmail.com> writes:

> A user shouldn't have to go out of their way to specify regular
> numbers on the command line, regardless of whether they're positive
> or negative.

A user shouldn't have to go out of their way to know whether what they
type on a command line will be treated as an option or an argument.

-- 
 \        "When I was crossing the border into Canada, they asked if I |
  `\     had any firearms with me. I said, 'Well, what do you need?'"  |
_o__)                                                 -- Steven Wright |
Ben Finney


From steve at holdenweb.com  Sun Sep 16 11:49:41 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 16 Sep 2007 11:49:41 -0400
Subject: Needless copying in iterations?
In-Reply-To: <13epv3fnb6bak15@corp.supernews.com>
References: <fchk59$mm3$1@daisy.noc.ucla.edu>	<5l3ab6F5v20uU3@mid.uni-berlin.de>
	<13eourdrne86e61@corp.supernews.com>	<874phv42to.fsf@benfinney.id.au>
	<13epv3fnb6bak15@corp.supernews.com>
Message-ID: <fcjjak$m0k$2@sea.gmane.org>

Steven D'Aprano wrote:
> On Sun, 16 Sep 2007 15:05:55 +1000, Ben Finney wrote:
> 
>> Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> writes:
>>
>>> In *general* the compiler can't tell, but in specific cases it could. A
>>> (hypothetical) optimizing compiler would tell the difference between:
>>>
>>> for item in alist[1:5]:
>>>     print item # no possible side-effects
>> The 'print' statement converts the 'item' to a str. That conversion
>> could, in a pathological case, have a side-effect (say, if the class of
>> 'item' had an overridden '__str__' method with side effects), and the
>> compiler can't know this isn't a pathological case.
> 
> Fair enough... but I'm reminded of a rant by Joel Spolsky about GUI 
> design:
> 
> '...programmers have tended to think that if users are allowed to resize 
> and move windows, they should have complete flexibility over where these 
> windows go, right down to the last pixel. After all, positioning a window 
> 2 pixels from the top of the screen is "equally likely" as positioning a 
> window exactly at the top of the screen.'
> 
> http://www.joelonsoftware.com/uibook/fog0000000249.html
> 
> (three quarters of the way down, in Chapter 7.)
> 
> Maybe I'm being unfair, but it seems to me that the attitude is similar: 
> 'there's no point optimizing the common case of printing (say) ints 
> stored in a list, Just In Case the programmer wants the incredibly rare 
> case of setting sys.stdout to some wacky object that modifies the list 
> he's iterating over. It could happen.'
> 
> *shrug* But apart from the occasional smart-alec who does it just to 
> demonstrate that it is possible, it probably never has.
> 
> It seems to me that the "consenting adults" philosophy of Python doesn't 
> extend to the compiler, and perhaps it should. Maybe Python could 
> optimize common cases, and if developers wanted to do wacky things, let 
> them turn optimization off on a module-by-module basis.
> 
> Or even function-by-function. Wouldn't it be nice to have decorators that 
> could optimize the functions they decorated?
> 
No, it would be disastrous, unless you could manage to implement a 
mechanism that *told* you when the optimizations were playing havoc with 
your program's execution.

The problem is that debugging only works if you can assume a 
deterministic environment. If you are going to put funky optimizations 
in that break determinism in "little-used" corner cases, then debugging 
the situations when the optimizations *do* affect program execution will 
be a complete pain.

> 
>>> for item in alist[1:5]:
>>>     alist.append(item) # side-effects DON'T matter
>> The compiler doesn't know that, at the time of invocation,
>> 'alist.append' doesn't have side effects that matter.
> 
> It might if it knows what type alist is, and how long it is (as Marc 
> Rintsch points out). That's why I used "alist" in my example rather than 
> "an_arbitrary_sequence".
> 
But alist doesn't *have* a type, and static program analysis would have 
to be extensive to determine that it could only ever be of a specific type.
> 
>> The compiler for a dynamic language like Python has very little absolute
>> "no significant side-effect in these specific cases" guarantee of the
>> kind you're assuming even in the cases you choose for contrast with the
>> ones that *do* have significant side-effects.
> 
> Yes, in general one might not be able to make those guarantees, but still 
> there are common cases where you can. That's how Psycho works.
> 
Yes, but psycho doesn't use static program analysis but instead uses 
run-time environment examination to determine whether specific 
optimizations can be applied.

> The point is rather moot, since CPython (and probably other Pythons) do 
> almost no optimizations. But just because Python is a dynamic language 
> doesn't mean there are no optimizations possible: Haskell is a dynamic 
> language, and there are optimizing compilers for it. Of course, it is 
> much simpler for Haskell, because of the type system it uses.
> 
> The CPython compiler already does a couple of source-code optimizations 
> (ignores some unused strings; some constant folding) and at least one 
> runtime optimization (string concatenation is no longer _always_ slow):
> 
> http://utcc.utoronto.ca/~cks/space/blog/python/ExaminingStringConcatOpt
> 
> Because of its very nature, optimizing Python is hard. Even something as 
> simple as tail-call recursion optimization is verboten, because Guido 
> considers good stack traces more important than preventing stack 
> overflows in the first place:
> 
> http://www.tratt.net/laurie/tech_articles/articles/tail_call_optimization
> 
And who's to say he's wrong, especially since Python is intended to be 
an environment that's friendly to beginners.

> Anyway, I'm not really complaining. I like Python, I'm grateful for the 
> work the Python-dev people have already done, and I'm in no position to 
> volunteer to write an optimizing compiler. And it may be that, regardless 
> of how smart you make the compiler, Python simply can't be optimized 
> because of design decisions made back in 1990-whatever when Guido first 
> started his grand plan.
> 
There is some of that. The environment is so dynamic that even something 
as innocuous as attribute lookup can actually involve properties (for 
example) reading a relational database! I'm not saying that optimization 
under these circumstances is possible, but that it's much more difficult 
than is easily anticipated, and that the benefits to be gained might be 
less than you would think.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From charles.fox at gmail.com  Wed Sep 12 06:21:58 2007
From: charles.fox at gmail.com (Charles Fox)
Date: Wed, 12 Sep 2007 03:21:58 -0700
Subject: newbie: self.member syntax seems /really/ annoying
Message-ID: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>

I've just started playing around with Python, as a possible
replacement for a mix of C++, Matlab and Lisp.  The language looks
lovely and clean with one huge exception:  I do a lot of numerical
modeling, so I deal with objects (like neurons) described
mathematically in papers, by equations like
    a_dot = -k(a-u)
In other languages, this translates nicely into code, but as far as I
can tell, Python needs the ugly:
    self.a_dot = -self.k(self.a-self.u)
For large equations this is going to make my code seriously unreadable
to the point of needing to switch back to Matlab -- and it seems to go
against everything else about python's simplicity and elegance.  Am I
missing something?  Is there something like a 'with' command that lets
me set the scope, like

    with self:
      .a_dot = -.k(.a-.u)

It's premature to make language suggestions as I am new to the
language, but I would have though that making a 'with self' explicit
in all methods would have been neat, so I could just write
      .a_dot = -.k(.a-.u)
which would still avoid confusion with local function variables, since
'.a' is different from 'a'.

Please help if I am missing something -- this looks like a great
language but I am going to mad trying to read numerical code full of
'self.'s breaking up the equations.



From rcdailey at gmail.com  Tue Sep 25 21:14:34 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Tue, 25 Sep 2007 20:14:34 -0500
Subject: Regular Expressions: Can't quite figure this problem out
In-Reply-To: <46F995F2.5070405@sdf.lonestar.org>
References: <496954360709241737o6e42e7efk29886b5631f6ca2e@mail.gmail.com>
	<496954360709241853w6bb6e813ved0ec4fc80304d51@mail.gmail.com>
	<op.ty6tjyfqx6zn5v@gabriel2.softlabbsas.com.ar>
	<496954360709241917m3801e4aavee29cfef7deaf41b@mail.gmail.com>
	<fd9rs6$8b2$1@sea.gmane.org>
	<496954360709241951h6901d60etf2c4b3b5ec759f2a@mail.gmail.com>
	<op.ty6ztgx0x6zn5v@gabriel2.softlabbsas.com.ar>
	<496954360709251421l578b9dfdwcc0e67d293ede1f3@mail.gmail.com>
	<496954360709251516teda6f2dwe8190236029e3688@mail.gmail.com>
	<46F995F2.5070405@sdf.lonestar.org>
Message-ID: <496954360709251814y80d5263t5a8f72745b341dad@mail.gmail.com>

On 9/25/07, J. Cliff Dyer <jcd at sdf.lonestar.org> wrote:
>
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Robert Dailey top posted:
> > Hmm, ElementTree.tostring() also adds a space between the last
> > character of the element name and the />. Not sure why it is doing
> > this.
> >
> > Something like <root/> will become <root /> after the tostring().
>
>
> The space was common practice in pseudo-XHTML code when people still
> had to routinely support browsers like Netscape 4, which had no clue
> about XML.  It basically makes a uniquely XML construct into valid
> HTML.  Basically, the space makes unaware parsers treat the / as the
> next attribute.  Being an attribute with unknown meaning, the standard
> practice is to ignore it, and hence, it is parsed properly in both
> XHTML parsers and plain HTML parsers.  I guess the practice just
> caught on beyond the XHTML world.
>
> I don't know if there's a flag to get rid of it, but you can always
> dig into the code....
>
> Cheers,
> Cliff
>
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.7 (MingW32)
>
> iD8DBQFG+ZXyGI3CK/MIt30RAkvhAJ0TAz4Y5ngDEVo9wnRwPhESh+D64QCcDjdM
> JKT6H37LgX1Fk7665+Mqwh0=
> =GcvK
> -----END PGP SIGNATURE-----
>
>
Right now I just run a trivial regular expression on the result of
tostring() to remove the spaces.
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From ebouvier at jetmultimedia.fr  Thu Sep 27 11:03:02 2007
From: ebouvier at jetmultimedia.fr (Eric BOUVIER)
Date: Thu, 27 Sep 2007 17:03:02 +0200
Subject: Pb with an AttributeError
Message-ID: <FFC5D92B345ADD428B11AA3943023F300417685E@BARDEAU.hmc.jet>


Hello,

First, sorry for my english.

I've just been assigned a project written in Python which contains
bug(s).
I've never programmed in Python, but I've read the code  
and understood basically what the different source codes do.

I've traced the code and found where the problem is but I don't 
know how to solve the problem.

Here it is :

I've got a string issued from a CSV file : 
   string1 = eval(line[4])
   print " * string1 = (", string1 ,") \n"      
        =>  * string1 = ( {'header': 'X-Score', 'param': {'key':
'SP<136>=', 'value': ['SD:<0> ']} )

Then, there is a split with the equal : 
   TheParts = string.split(string1["param"], "=")
   print " * TheParts = (", TheParts ,") \n"

But, running the program returns : 

Traceback (most recent call last):
  File "C:\test\helper.py", line 136, in Action_handler
    Score_eval(line, OutputFile_SP, This_Host)
  File "C:\test\helper.py", line 66, in Score_eval
    TheParts = string.split(string1["param"], "=")
  File "C:\ActiveState\Python25\lib\string.py", line 290, in split
    return s.split(sep, maxsplit)
AttributeError: 'dict' object has no attribute 'split'  !?!

I've found that it works when I put directly the string in the split
expression : 

   TheParts = string.split(" {'key': 'ESP<136>=', 'value': ['SHA:<0> ']}
", "=")
      => * TheParts =   ["{'key': 'ESP<136>", "', 'value': ['SHA:<0>
']}"]

  But the code isn't dynamic anymore !
I think it's a problem with the type, but the different syntax I've
tried didn't work.
Is somebody could help me ?

 Thank you

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From attn.steven.kuo at gmail.com  Mon Sep 10 16:50:23 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: Mon, 10 Sep 2007 13:50:23 -0700
Subject: How do I disable warnings?
In-Reply-To: <13eb71tjns922f9@corp.supernews.com>
References: <13eb71tjns922f9@corp.supernews.com>
Message-ID: <1189457423.063659.127690@57g2000hsv.googlegroups.com>

On Sep 10, 12:34 pm, Grant Edwards <gra... at visi.com> wrote:
> I've read the documentation for the warnings module, but I'm
> still unable to figure out how to disable a warning.
>
> I'd like to disable this warning:
>
>  Warning: 'with' will become a reserved keyword in Python 2.6
>
> AFAICT, the following should work.  But, it doesn't.
>
>   import warnings
>   warnings.filterwarnings('ignore',".*'with' will become a reserved keyword.*")
>
> What am I doing wrong?
>


That looks to be a compile-time warning.  Refer to a
previous discussion here:

    http://groups.google.com/group/comp.lang.python/msg/9f604b477ad31ef3

--
Hope this helps,
Steven




From erik at myemma.com  Fri Sep 21 17:18:26 2007
From: erik at myemma.com (Erik Jones)
Date: Fri, 21 Sep 2007 16:18:26 -0500
Subject: newb: Simple regex problem headache
In-Reply-To: <1190408680.273525.209270@w3g2000hsg.googlegroups.com>
References: <1190408680.273525.209270@w3g2000hsg.googlegroups.com>
Message-ID: <1DF6C386-661E-4191-9952-7349390B8BCE@myemma.com>


On Sep 21, 2007, at 4:04 PM, crybaby wrote:

> import re
>
> s1 ='&nbsp;25000&nbsp;'
> s2 = '&nbsp;5.5910&nbsp;'
>
> mypat = re.compile('[0-9]*(\.[0-9]*|$)')
> rate= mypat.search(s1)
> print rate.group()
>
> rate=mypat.search(s2)
> print rate.group()
> rate = mypat.search(s1)
> price = float(rate.group())
> print price
>
> I get an error when it hits the whole number, that is in this format:
> s1 ='&nbsp;25000&nbsp;'
> For whole number s2, mypat catching empty string.  I want it to give
> me 25000.
> I am getting this error:
>
>     price = float(rate.group())
>     ValueError: empty string for float()
>
> Anyone knows, how I can get 25000 out of s2 = '&nbsp;5.5910&nbsp;'
> using regex pattern, mypat = re.compile('[0-9]*(\.[0-9]*|$)').  mypat
> works fine for real numbers, but doesn't work for whole numbers.

I'm not sure what you just said makes a lot of sense, but if all your  
looking for is a regex that will match number strings with or without  
a decimal point, try '\d*\.?\d*'

Erik Jones

Software Developer | Emma?
erik at myemma.com
800.595.4401 or 615.292.5888
615.292.0777 (fax)

Emma helps organizations everywhere communicate & market in style.
Visit us online at http://www.myemma.com




From carsten at uniqsys.com  Fri Sep 14 12:53:23 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 14 Sep 2007 12:53:23 -0400
Subject: where is help file?
In-Reply-To: <46eab4bc$0$3811$5402220f@news.sunrise.ch>
References: <13el4vvna6jildc@corp.supernews.com>
	<mailman.539.1189779786.2658.python-list@python.org>
	<46eab4bc$0$3811$5402220f@news.sunrise.ch>
Message-ID: <1189788803.3377.14.camel@dot.uniqsys.com>

On Fri, 2007-09-14 at 18:20 +0200, Martin Blume wrote:
> AFAIK you have to import the module first, before you can get help
> on that module.

While that is true of the help(module_name) form, this is not necessary
in the interactive helper you start by calling help().

-- 
Carsten Haese
http://informixdb.sourceforge.net




From meesters at uni-mainz.de  Sun Sep 23 17:53:53 2007
From: meesters at uni-mainz.de (Christian Meesters)
Date: Sun, 23 Sep 2007 23:53:53 +0200
Subject: strange behavious of the logging module?
Message-ID: <fd6n9i$8hc$1@news1.zdv.uni-mainz.de>

Hi,

having the following code:

import logging
logging.basicConfig(level=logging.ERROR,
                    format='%(levelname)-8s %(message)s',
                    filename='mc_rigid.log',
                    filemode='w')
# define a Handler which writes INFO messages or higher to the sys.stderr
console = logging.StreamHandler()
console.setLevel(logging.INFO)
# set a format which is simpler for console use
formatter = logging.Formatter('%(message)s')
# tell the handler to use this format
console.setFormatter(formatter)
# add the handler to the root logger
logging.getLogger('').addHandler(console)

I observe nothing printed on the console. However if I change the level
(just after the import) from logging.ERROR to logging.DEBUG I do see all
info lines on the console as intended.

Can anybody tell my mistake? I thought changing the level in basicConfig
would have no impact on the following StreamHandler instance.
Also, adding %(funcName)-8s to the formatter in basigConfig does not work
for me: instead of the functions name the level in lower case gets inserted
into the logfile.

My python:
Python 2.5.1 (r251:54863, May  2 2007, 16:56:35) 
[GCC 4.1.2 (Ubuntu 4.1.2-0ubuntu4)] on linux2

TIA
Christian


From joemystery123 at gmail.com  Thu Sep 20 23:04:50 2007
From: joemystery123 at gmail.com (crybaby)
Date: Thu, 20 Sep 2007 20:04:50 -0700
Subject: newb: BeautifulSoup
Message-ID: <1190343890.375836.78630@r29g2000hsg.googlegroups.com>

I need to traverse a html page with big table that has many row and
columns.  For example, how to go 35th td tag and do regex to retireve
the content.  After that is done, you move down to 15th td tag from
35th tag (35+15) and do regex to retrieve the content?



From zzbbaadd at aol.com  Thu Sep 13 14:37:39 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Thu, 13 Sep 2007 11:37:39 -0700
Subject: Python 3K or Python 2.9?
In-Reply-To: <46e96aaa$0$7685$9b4e6d93@newsspool2.arcor-online.net>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<87sl5j5r34.fsf@benfinney.id.au>
	<1189646281.569796.267940@d55g2000hsg.googlegroups.com>
	<87ir6f5mrq.fsf@benfinney.id.au>
	<1189651204.408268.57580@19g2000hsx.googlegroups.com>
	<1i4dddf.piaojwz9lz40N%aleax@mac.com>
	<1189700775.661780.292150@50g2000hsm.googlegroups.com>
	<46e96aaa$0$7685$9b4e6d93@newsspool2.arcor-online.net>
Message-ID: <1189708659.784852.285160@22g2000hsm.googlegroups.com>


>
> (Can you tell I'm currently forced to developing in Java? ;) (Which I'm
> currently avoiding to do, by wasting my time on usenet.))
>

Maybe you can sneak Jython into the mix. Just describe it as "this
Java scripting language".






From wizzardx at gmail.com  Fri Sep 28 03:11:58 2007
From: wizzardx at gmail.com (David)
Date: Fri, 28 Sep 2007 09:11:58 +0200
Subject: marshal bug?
In-Reply-To: <1190961020.258850.215130@g4g2000hsf.googlegroups.com>
References: <1190961020.258850.215130@g4g2000hsf.googlegroups.com>
Message-ID: <18c1e6480709280011g1fcc4976v77dd0eec0e416752@mail.gmail.com>

On 9/28/07, Anurag <anuraguniyal at gmail.com> wrote:
> I have been chasing a problem in my code since hours and it bolis down
> to this
> import marshal
> marshal.dumps(str(123)) != marshal.dumps(str("123"))
>

I'm not sure why, but marshal does dump the 2 differently. ie:

>>> marshal.dumps(str(123))
's\x03\x00\x00\x00123'

>>> marshal.dumps(str("123"))
't\x03\x00\x00\x00123'

Somehow, marshal detects a difference between these 2 and changes the
first character in it's output. From the documentation:

"Details of the format are undocumented on purpose; it may change
between Python versions (although it rarely does)".

So you could check the C code to find out what the "s" and "t" mean,
but your assumptions on the format for your app could become incorrect
with new Python versions, or with different marshalling backends.


From boris.dusek at gmail.com  Sat Sep 15 07:55:28 2007
From: boris.dusek at gmail.com (=?utf-8?B?Qm9yaXMgRHXFoWVr?=)
Date: Sat, 15 Sep 2007 11:55:28 -0000
Subject: int('\x23') != 0x23 (a.k.a convert char to integer of its byte
	representation)
Message-ID: <1189857328.342615.105660@g4g2000hsf.googlegroups.com>

Hi,

I am looking for the best way to convert a string of length 1 (= 1
character as string) to integer that has the same value as numeric
representation of that character. Background: I am writing functions
abstracting endianness, e.g. converting a string of length 4 to the
appropriate integer value (e.g. '\x01\x00\x00\x00' = 2**24 for big
endian memory, 2**0 for little endian memory). For this, I need to
know the numeric value of each byte and sum them according to
endianness.

I thought that something like int('\x01') might work, provided the
argument is string of length 1, but that throws an error:

>>> int('\x12')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ValueError: invalid literal for int():

The code I want to write looks like this:

mem = '\x11\x22\x33\x44'
factor = 1
sum = 0
for byte in mem:
    sum += int(byte) * factor
    factor *= 2**8

Could you please tell me how to achieve what I want in Python? (it
would be straightforward in C)

Thanks for any suggestions,
Boris Du?ek



From missive at frontiernet.net  Sun Sep  9 18:05:13 2007
From: missive at frontiernet.net (Lee Harr)
Date: Sun, 09 Sep 2007 22:05:13 GMT
Subject: Modul (%) in python not like in C?
References: <880dece00709091201n449d4c2k31998a5d426de17d@mail.gmail.com>
	<46E4466C.2030303@sdf.lonestar.org>
	<mailman.300.1189371539.2658.python-list@python.org>
Message-ID: <slrnfe8rgp.66h.missive@dell.linuxdev.us.dell.com>

>> Python will always yield a number x = m%n such that 0 <= x < n, but 
>> Turbo C will always yield a number such that if x = m%n -x = -m%n.  That 
>> is, since 111 % 10 = 1, -111 % 10 = -1.  The two values will always 
>> differ by n (as used above). 


Maybe it is an order-of-operations thing....

-111 % 10 = -1
(-111) % 10 = 9
?



From Chris.Tidy at jet.uk  Tue Sep  4 06:06:37 2007
From: Chris.Tidy at jet.uk (Chris.Tidy at jet.uk)
Date: Tue, 04 Sep 2007 03:06:37 -0700
Subject: TypeError: 'module object is not callable'
In-Reply-To: <46dc6f49$0$6207$426a34cc@news.free.fr>
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<mailman.315.1188810174.28954.python-list@python.org>
	<46dbd11e$0$6228$426a74cc@news.free.fr>
	<mailman.317.1188812089.28954.python-list@python.org>
	<1188816626.021956.281040@22g2000hsm.googlegroups.com>
	<5k2cjmF1r2aiU1@mid.uni-berlin.de>
	<1188836008.656284.76160@o80g2000hse.googlegroups.com>
	<46dc6f49$0$6207$426a34cc@news.free.fr>
Message-ID: <1188900397.459760.259580@k79g2000hse.googlegroups.com>

Thanks guys. Changing to how Python does things has a lot of geting
used to!
Do any of you have any ideas on the best way to do the following
problem:

Each loop I perform, I get a new list of Strings.
I then want to print these lists as columns adjacent to each other
starting with the first
created list in the first column and last created list in the final
column.

If you need any more information, just let me know!
Cheers



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Sep 10 07:47:46 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 10 Sep 2007 13:47:46 +0200
Subject: Python syntax wart
References: <fbvvil$7dj$1@lust.ihug.co.nz><5khh6nF3i5nuU1@mid.uni-berlin.de>
	<46E390B7.2080808@web.de> <fc0518$aa2$5@lust.ihug.co.nz>
	<5ki2sdF3nr68U1@mid.individual.net>
	<1189414151.003351.229860@r34g2000hsd.googlegroups.com>
Message-ID: <5kkp72F486kdU1@mid.individual.net>

Gabriel Genellina wrote:
> Do you know the Befunge language? Program flow is not lineal but
> along a 2D grid. There are variants over toroids and more bizarre
> surfaces, even using 3D.

Ah, I remember. Once read about it. Really cool idea :)

Regards,


Bj?rn

-- 
BOFH excuse #149:

Dew on the telephone lines.



From heikki at osafoundation.org  Fri Sep 28 17:13:13 2007
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Fri, 28 Sep 2007 14:13:13 -0700
Subject: Python  and SSL
In-Reply-To: <1190959345.041723.108130@k79g2000hse.googlegroups.com>
References: <1190959345.041723.108130@k79g2000hse.googlegroups.com>
Message-ID: <6cydncA2Jpv082DbnZ2dnUVZ_q6dnZ2d@comcast.com>

Johny wrote:
> I need to use Python with SSL comunication betweeen servers.
> (I use hhtplib but I think urllib2 can also be used )
>  I think I need to use SSL root certificate and tell  a program to
> trust this certificate.

You can't do secure SSL with the builtin SSL support, you need to use a
third party module. There are a few available, including M2Crypto, TLS
Lite, pyOpenSSL and pyOpenSSL-extended. Since I am the maintainer of
M2Crypto I will naturally recommend that ;)

http://chandlerproject.org/Projects/MeTooCrypto

-- 
  Heikki Toivonen


From ldo at geek-central.gen.new_zealand  Mon Sep 24 00:29:12 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 24 Sep 2007 16:29:12 +1200
Subject: Newbie completely confused
References: <4437CC27-104E-4EE9-80DB-DCF36213B44F@gmail.com>
	<mailman.912.1190438242.2658.python-list@python.org>
Message-ID: <fd7eeo$g31$4@lust.ihug.co.nz>

In message <mailman.912.1190438242.2658.python-list at python.org>, Gabriel
Genellina wrote:

> En Fri, 21 Sep 2007 13:34:40 -0300, Jeroen Hegeman
> <jeroen.hegeman at gmail.com> escribi?:
> 
>> class ModerateClass:
>>      def __init__(self):
>>          return
>>      def __del__(self):
>>          pass
>>          return
>>
>> class HugeClass:
>>      def __init__(self,line):
>>          self.clear()
>>          self.input(line)
>>          return
>>      def __del__(self):
>>          del self.B4v
>>          return
>>      def clear(self):
>>          self.long_classes = {}
>>          self.B4v={}
>>          return
> 
> (BTW, all those return statements are redundant and useless)

The OP could be trying to use them as some kind of textual indicator of the
end of the function. Myself, I prefer end-comments, e.g.

    class HugeClass :

        ...

        def clear(self) :
            ...
        #end clear

    #end HugeClass



From torriem at chem.byu.edu  Sat Sep  1 15:44:28 2007
From: torriem at chem.byu.edu (Michael L Torrie)
Date: Sat, 01 Sep 2007 13:44:28 -0600
Subject: list index()
In-Reply-To: <1i3ob5k.dm3jmoqx1z68N%aleax@mac.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>	<mailman.135.1188474634.28954.python-list@python.org>	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
	<1i3ob5k.dm3jmoqx1z68N%aleax@mac.com>
Message-ID: <46D9C11C.5010103@chem.byu.edu>

Alex Martelli wrote:

> is the "one obvious way to do it" (the set(...) is just a simple and
> powerful optimization -- checking membership in a set is roughly O(1),
> while checking membership in a list of N items is O(N)...).

Depending on a how a set is stored, I'd estimate any membership check in
a set to be O(log N).  That's if it's stored in a tree of some kind,
which you'd need to fast finding.  Say a balanced binary tree.  Worst
case, you'd have to search half of the elements to find what you were
looking for.

> 
> 
> Alex



From dandolls at yahoo.co.in  Sat Sep 22 02:47:28 2007
From: dandolls at yahoo.co.in (Amit Kumar Saha)
Date: Sat, 22 Sep 2007 12:17:28 +0530
Subject: Writing Object Data to Disk
Message-ID: <1190443648.5838.6.camel@ubuntu-laptop>

Hello,

I have a Python class with data members, say:

class Foo:
	def __init__(self):
		
		self.a=7
		self.b[]={1,3,4}
		#couple of more lists, tuples, etc

I would like to know if "Pickling" the class object is the only way of
writing it to disk for persistent storage. Also, do we have a concept
similar to "array of objects" in Python? The number of objects is only
known at "run-time".

Thanks,

-- 
Amit Kumar Saha
me blogs@ http://amitksaha.blogspot.com
URL:http://amitsaha.in.googlepages.com




From steve at REMOVE-THIS-cybersource.com.au  Fri Sep 21 10:18:55 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Fri, 21 Sep 2007 14:18:55 -0000
Subject: Calling constructor but not initializer
Message-ID: <13f7kmfhe19lb7b@corp.supernews.com>

I have a class that has a distinct "empty" state. In the empty state, it 
shouldn't have any data attributes, but it should still have methods.

The analogy is with a list: an empty list still has methods like append() 
etc. but it has no "data", if by data you mean items in the list.

I can construct an empty instance in the __new__ constructor, and I can 
initialize an non-empty instance in the __init__ initializer, but I can't 
think of any good way to stop __init__ from being called if the instance 
is empty. In pseudo-code, I want to do something like this:

class Parrot(object):
    def __new__(cls, data):
        construct a new empty instance
        if data is None:
            return that empty instance
        else:
            call __init__ on the instance to populate it
            return the non-empty instance


but of course __init__ is automatically called.


Any suggestions for doing something like this?


-- 
Steven


From nick at craig-wood.com  Thu Sep 20 09:30:10 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Thu, 20 Sep 2007 08:30:10 -0500
Subject: unittest tutorial
References: <fctj6d$4gk$1@ss408.t-com.hr>
Message-ID: <slrnff4rtv.hk4.nick@irishsea.home.craig-wood.com>

Gigs_ <gigs at hi.t-com.hr> wrote:
>  does anyone know some good tutorial for unittest? (with examples
>  how unit work)?

There is one in Dive into Python

  http://www.diveintopython.org/unit_testing/index.html

Buy the book is my advice!
-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From cstewart913 at gmail.com  Thu Sep 27 10:50:57 2007
From: cstewart913 at gmail.com (cstewart913 at gmail.com)
Date: Thu, 27 Sep 2007 14:50:57 -0000
Subject: os.removedirs - How to force this delete?
Message-ID: <1190904657.333070.45290@n39g2000hsh.googlegroups.com>

I've been searching to find a way to force this delete to work even if
the directory isn't empty.  I've had no luck thus far.  Anyone know
what that would be?



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Sep  7 03:22:27 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 07 Sep 2007 09:22:27 +0200
Subject: Why 'class spam(object)' instead of class spam(Object)' ?
In-Reply-To: <mailman.205.1189146609.2658.python-list@python.org>
References: <mailman.205.1189146609.2658.python-list@python.org>
Message-ID: <46e0fc2e$0$2273$426a74cc@news.free.fr>

Sergio Correia a ?crit :
> Hi, I'm kinda new to Python (that means, I'm a total noob here), but
> have one doubt which is more about consistency that anything else.
> 
> Why if PEP 8 says that "Almost without exception, class names use the
> CapWords convention", does the most basic class, object, is lowercase?

Because it is an exception ?-)

Notice that all builtin types (list, dict, set, str, unicode, int, long, 
float, tuple, file, object, type, function, classmethod, staticmethod, 
property etc) are lower-case.

(snip interrogations about "object"'s type)

>>>> class Eggs(object):
> 	def __init__(self):
> 		self.x = 1
>>>> type(Eggs)
> <type 'type'>
> 
> Type 'type'? What is that supposed to mean?

type(Eggs) is roughly equivalent to Eggs.__class__, ie it returns the 
class of the Eggs class object, IOW the metaclass. In Python, classes 
are objects, so they are themselves instances of a class - by default, 
for new-style classes, instances of the class 'type'. In case you 
wonder, class 'type' is an instance of itself.


> Hope this makes any sense ;),

Idem !-)



From steve at holdenweb.com  Wed Sep 19 12:54:28 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 19 Sep 2007 12:54:28 -0400
Subject: psycopg2 or pygresql?
In-Reply-To: <1190219077.252577.259570@19g2000hsx.googlegroups.com>
References: <1190214385.994370.167750@r29g2000hsg.googlegroups.com>	<mailman.771.1190216902.2658.python-list@python.org>
	<1190219077.252577.259570@19g2000hsx.googlegroups.com>
Message-ID: <fcrk81$oh9$1@sea.gmane.org>

exhuma.twn wrote:
[...]
> 
> Apparently I am deaf dumb and blind.... :( Sorry. I grepped several
> times through the PEP for various other reasons, and this little bit
> escaped me.
> 
You forgot "stupid" ;-)

> Thanks for being nice guys and answering anyhow. Much appreciated.
> 

A pleasure.

been-known-to-act-stupid-myself-ly y'rs  - steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From exhuma at gmail.com  Wed Sep 19 11:06:25 2007
From: exhuma at gmail.com (exhuma.twn)
Date: Wed, 19 Sep 2007 08:06:25 -0700
Subject: psycopg2 or pygresql?
Message-ID: <1190214385.994370.167750@r29g2000hsg.googlegroups.com>

Plain and simple. What would you use?

So far I have written everything with psycopg2. One thing that annoys
me is that I cannot easily access the column names from a query. I
know that this is not part of the DBAPI2  so I cannot expect the model
to suport it.

I quite like the "mogrify" method of psycopg2 very much. It's very
useful for debugging.

And before someone says: "Use the DictCursor-factory to access column
names". Yes I can do that. But a dict does not guarantee the same
order of keys as the columns were specified in the query.

The reason: I wrote a very simple Qt-Widget (inherited from
QTableWidget) that takes a SQL query and displays the results. And I
would like to have the columns ordered the same way as I specified in
the query *with* a header-label. For now I hava a method on the widget
which takes a query, *and* a list of labels.

I can live with that though. Although it itches me.

Would pygresql solve my dilemma? Or would you rather say: "Don't use
pygresql!"  ;)



From paul.nospam at rudin.co.uk  Thu Sep 20 13:14:17 2007
From: paul.nospam at rudin.co.uk (Paul Rudin)
Date: Thu, 20 Sep 2007 18:14:17 +0100
Subject: An Editor that Skips to the End of a Def
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
Message-ID: <87hclpjm3a.fsf@rudin.co.uk>

"W. Watson" <wolf_tracks at invalid.com> writes:

> Thanks, but no thanks. The learning curve is way too steep.

Up to you but, these days emacs comes with all sorts of
pointing-clicky-menu-y type things - you don't really have to learn
anything to get started.

(It even gives useful advice on top-posting if you use it as a news
client :/)


From ladynikon at gmail.com  Wed Sep  5 13:20:23 2007
From: ladynikon at gmail.com (Danyelle Gragsone)
Date: Wed, 5 Sep 2007 13:20:23 -0400
Subject: PythonAlley.com
In-Reply-To: <1189012363.397845.174960@y42g2000hsy.googlegroups.com>
References: <mailman.92.1189002436.2658.python-list@python.org>
	<1189012363.397845.174960@y42g2000hsy.googlegroups.com>
Message-ID: <59f9c5160709051020n2a3aab69l5a1022bef606559f@mail.gmail.com>

Hey,

I would tool around other python sites.. look for anything you would
like to see or maybe improve on.

Danyelle


From saptarshi.guha at gmail.com  Sat Sep  8 13:45:04 2007
From: saptarshi.guha at gmail.com (sapsi)
Date: Sat, 08 Sep 2007 10:45:04 -0700
Subject: Using struct timeval in python
Message-ID: <1189273504.153216.60470@22g2000hsm.googlegroups.com>

Hi,
I am using a library (pcapy) that returns a timeval object T=
(seconds,microseconds) where microseconds is always < 1e6.
Is there a Python class that can handle timeval structs? Specifically,
I wish to subtract two T (defined above) objects, taking into account
the large values of T[0] and T[1] (esp T[0])?

At one point, I would have to step in, since T[0] rolls back to zero
(after some time).

Any pointers?
Thanks in advance
Saptarshi



From stefano.esposito87 at gmail.com  Mon Sep 17 12:23:59 2007
From: stefano.esposito87 at gmail.com (Stefano Esposito)
Date: Mon, 17 Sep 2007 18:23:59 +0200
Subject: How to assign a function to another function
Message-ID: <20070917182359.600c6837.stefano.esposito87@gmail.com>

Hi all

what i'm trying to do is this:

>>>def foo ():
...	return None
...
>>>def bar ():
...	print "called bar"
...
>>>def assigner ():
...	foo = bar
...
>>>assigner()
>>>foo()
called bar
>>>

This piece of code is not working and even trying with
>>>def assigner (a, b):
...	a = b
...
>>>assigner(foo, bar)
>>>foo()

isn't working. How can I achieve my goal?

Thanks for your help! :)
-- 
Stefano Esposito <stefano.esposito87 at gmail.com>


From kay.schluehr at gmx.net  Sat Sep 22 02:49:08 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Fri, 21 Sep 2007 23:49:08 -0700
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <1190414192.636397.146450@57g2000hsv.googlegroups.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<1190413322.962737.53900@r29g2000hsg.googlegroups.com>
	<1190414192.636397.146450@57g2000hsv.googlegroups.com>
Message-ID: <1190443748.907702.154660@22g2000hsm.googlegroups.com>

On 22 Sep., 00:36, Cristian <super.sgt.pep... at gmail.com> wrote:

> Yeah, I agree, that does look pretty ugly. Correct me if I'm wrong,
> but I thought the way Python determines a block is by the whitespace
> of the first line. So, as long as the spacing (or !tabbing!) is
> consistent from line to line the parser will know it's part of the
> same block. From that I don't think the parser would have much trouble
> extracting the function definition from the above example. I would
> change the word "def". That's never been informative enough for me.

Here is the grammar:

http://svn.python.org/projects/stackless/tags/python-2.5/Grammar/Grammar

If you feel you can transform it into another unambigous grammar
mixing statements and expressions it's up to you. Guido at least does
not seem to show interest:

http://www.artima.com/weblogs/viewpost.jsp?thread=147358

When you are working on it you'll need a parser generator that also
checks your changes.
EasyExtend might help

http://www.fiber-space.de/EasyExtend/doc/EE.html

You can use it with Python 2.5, create a new fiber and a Grammar.ext
file. Note that the parser generator is LL(1) so it is not all
powerfull but *very* efficient. Tokenization is performed separately.
INDENT, DEDENT are indentation token used within the definition of the
suite nonterminal. I'd provide additional help when you get stuck.

Finally the standard response to your claims: "this is all open
source". This advice might be annoying and uncomfortable and maybe you
just want to talk about some problems and make a few guesses instead
of solving them actually. We are all Web 2.0 now and discussing issues
and doing socialization might be more important than everything else
even among geeks. This can be confusing however for people who believe
that softskills are not everything.

Regards, Kay







From david at nospam.spam  Sun Sep 23 21:47:29 2007
From: david at nospam.spam (david)
Date: Mon, 24 Sep 2007 11:47:29 +1000
Subject: Getting rid of bitwise operators in Python 3?
In-Reply-To: <1190504436.192047.173220@n39g2000hsh.googlegroups.com>
References: <46f49740$0$32514$4c368faf@roadrunner.com>
	<miaJi.28220$eY.3184@newssvr13.news.prodigy.net>
	<1190484589.890198.266430@y42g2000hsy.googlegroups.com>
	<SDfJi.54712$YL5.36046@newssvr29.news.prodigy.net>
	<5lllcaF8gic1U12@mid.uni-berlin.de>
	<1190504436.192047.173220@n39g2000hsh.googlegroups.com>
Message-ID: <13fe5pjo0se9275@corp.supernews.com>

richyjsm at gmail.com wrote:
> On Sep 22, 7:04 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>> On Sat, 22 Sep 2007 21:17:38 +0000, Bryan Olson wrote:
>>> The operator module offers pow(). Is there any good reason for
>>> pow() as a built-in?
>> The `operator.pow()` is  just the function for ``**``, it lacks the
>> optional third argument of the built in `pow()`.
>>
>> Ciao,
>>         Marc 'BlackJack' Rintsch
> 
> But does the three-argument version of pow() really belong in the
> core?  Who uses it?

It was a common cryptographic operation.

The two-argument version is used by the same
person who wrote the semi-colon at the end of
every line of the code I'm working with.

Personally, I'm sorry that 'and' and 'or' weren't
chosen for the bitwise operators: I'd happily give
up 'and' and 'or' for logic operations.

[david]


From david.barr456 at btinternet.com  Thu Sep  6 13:29:32 2007
From: david.barr456 at btinternet.com (David Barr)
Date: Thu, 06 Sep 2007 18:29:32 +0100
Subject: Beginners Query - Simple counter problem
Message-ID: <WZidnbvgAJstpX3bRVnytgA@bt.com>

I am brand new to Python (this is my second day), and the only 
experience I have with programming was with VBA.  Anyway, I'm posting 
this to see if anyone would be kind enough to help me with this (I 
suspect, very easy to solve) query.

The following code is in a file which I am running through the 
interpreter with the execfile command, yet it yeilds no results.  I 
appreciate I am obviously doing something really stupid here, but I 
can't find it.  Any help appreciated.


def d6(i):
     roll = 0
     count = 0
     while count <= i:
         roll = roll + random.randint(1,6)
         count += 1

     return roll

print d6(3)


From http  Fri Sep 28 20:07:54 2007
From: http (Paul Rubin)
Date: 28 Sep 2007 17:07:54 -0700
Subject: Can I overload the compare (cmp()) function for a Lists ([])
	index function?
References: <1191000652.430036.288400@y42g2000hsy.googlegroups.com>
Message-ID: <7xzlz6mizp.fsf@ruckus.brouhaha.com>

xkenneth <xkenneth at gmail.com> writes:
> Looking to do something similair. I'm working with alot of timestamps
> and if they're within a couple seconds I need them to be indexed and
> removed from a list.
> Is there any possible way to index with a custom cmp() function?

This sounds like you want itertools.groupby.  What is the exact
requirement?


From wangzq at gmail.com  Tue Sep 11 23:00:00 2007
From: wangzq at gmail.com (wangzq)
Date: Tue, 11 Sep 2007 20:00:00 -0700
Subject: Get the complete command line as-is
Message-ID: <1189566000.793354.308420@19g2000hsx.googlegroups.com>

Hello,

I'm passing command line parameters to my browser, I need to pass the
complete command line as-is, for example:

test.py "abc def" xyz

If I use ' '.join(sys.argv[1:]), then the double quotes around "abc
def" is gone, but I need to pass the complete command line ("abc def"
xyz) to the browser, how can I do this?

I'm on Windows.

Thanks.



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Sep 17 10:01:23 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 17 Sep 2007 16:01:23 +0200
Subject: A short question about non-ascii characters in list
References: <mailman.636.1190005732.2658.python-list@python.org>
	<1190006587.185218.168340@22g2000hsm.googlegroups.com>
	<mailman.638.1190013927.2658.python-list@python.org>
Message-ID: <5l7fljF6ot2jU1@mid.individual.net>

js wrote:
> That's make sence, but it's also true that
> sometimes we want to see the contents of a list in pretty format.

That may be true, but most of the time not (at least not me) --
lists are no pretty printing instrument, but a container.

> So for now I need to write and use crappy mylist like this.
> 
> class mylist(list):
>     def __str__(self):
>         return '[' + ', '.join(self) + ']'
> 
> l = mylist([u"???", u"???", u"???"])
> print unicode(l)
> 
> 
> very ugly, but just works.

What's wrong with

print ",".join(mylist)

? Also, the your solution isn't really "ugly" in my opinion.

Regards,


Bj?rn

-- 
BOFH excuse #55:

Plumber mistook routing panel for decorative wall fixture



From cscheit at lstm.uni-erlangen.de  Thu Sep 20 11:24:23 2007
From: cscheit at lstm.uni-erlangen.de (Christoph Scheit)
Date: Thu, 20 Sep 2007 17:24:23 +0200
Subject: Python-list Digest, Vol 48, Issue 301
In-Reply-To: <mailman.2897.1190299804.2656.python-list@python.org>
References: <mailman.2897.1190299804.2656.python-list@python.org>
Message-ID: <200709201724.23611.cscheit@lstm.uni-erlangen.de>

Hello,

is there a way to do something like
for i,j in l1, l2:
    print i,j

?
Thanks in advance,
Chris

-- 

============================
M.Sc. Christoph Scheit
Institute of Fluid Mechanics
FAU Erlangen-Nuremberg
Cauerstrasse 4
D-91058 Erlangen
Phone: +49 9131 85 29508
============================


From pablo at decode.com.ar  Sat Sep 29 14:18:23 2007
From: pablo at decode.com.ar (Pablo Ziliani)
Date: Sat, 29 Sep 2007 15:18:23 -0300
Subject: strange unbound local error?
In-Reply-To: <1191089079.818739.245820@22g2000hsm.googlegroups.com>
References: <1191089079.818739.245820@22g2000hsm.googlegroups.com>
Message-ID: <46FE96EF.1060404@decode.com.ar>

righes at arcor.de wrote:
> spam = 42
>
> def eggs():
>     print spam
>     spam = spam + 1
>
> if __name__=="__main__":
>     eggs()
>
> This thows an UnboundLocalError at line 4 (print statement). But if I
> comment out line 5 (variable assignment), no error occurs.
>
> Can you explain me this, please?

Hi Enrico,

You need to say that you will be modifying the variable in the global 
scope, like this:

spam = 42

def eggs():
    global spam # <--here
    print spam
    spam = spam + 1

if __name__=="__main__":
    eggs()


This can help you:
http://www.pasteur.fr/recherche/unites/sis/formation/python/ch04.html


Pablo


From cai.haibin at gmail.com  Wed Sep 26 11:42:37 2007
From: cai.haibin at gmail.com (james_027)
Date: Wed, 26 Sep 2007 15:42:37 -0000
Subject: regex with specific list of string
Message-ID: <1190821357.753909.178210@50g2000hsm.googlegroups.com>

hi,

how do I regex that could check on any of the value that match any one
of these ... 'jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug',
'sep', 'oct', 'nov', 'dec'

Thanks
james



From skulka3 at gmail.com  Thu Sep 27 12:53:31 2007
From: skulka3 at gmail.com (skulka3 at gmail.com)
Date: Thu, 27 Sep 2007 16:53:31 -0000
Subject: Implement file download using python
In-Reply-To: <5m24lrFb8ao0U1@mid.uni-berlin.de>
References: <1190910556.681518.277220@o80g2000hse.googlegroups.com>
	<5m24lrFb8ao0U1@mid.uni-berlin.de>
Message-ID: <1190912011.073484.68250@o80g2000hse.googlegroups.com>

On Sep 27, 11:39 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>  skul... at gmail.com wrote:
> > Hello,
>
> > I want to implement file downloads inside an authenticated web page,
> > such that when a user clicks a link, the server side python code
> > connects to a ftp server, downloads a relevant file and then streams
> > the file to the browser for the user to open it with the appropriate
> > application. In this case it will either be a pdf or a tiff file.
>
> > This function is quite similar to something like writing raw bytes to
> > a ServletOutputStream in java to be rendered directly to the user.
>
> > It would be nice if someone can provide guidance, examples on how such
> > a task may be accomplished using python.
>
> Fetching using ftplib is easy. But serving depends on what
> HTTP-server-environment you use. Please elaborate on that.
>
> Diez

Thanks Diez for your reply.
I am comfortable with using ftplib to fetch the file. As for the HTTP-
server environment,
I am using Apache 1.3 web server and python 2.1.3.

Salil.

Salil.



From gagsl-py2 at yahoo.com.ar  Sun Sep  9 15:17:49 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 09 Sep 2007 16:17:49 -0300
Subject: /dev/null as a file-like object, or logging to nothing
References: <87k5r1jdzq.fsf@wilson.homeunix.com>
	<5kg48jF33dv5U3@mid.uni-berlin.de>
	<87fy1pjbpl.fsf@wilson.homeunix.com>
Message-ID: <op.tyeijzs9x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 08 Sep 2007 14:42:14 -0300, Torsten Bronger  
<bronger at physik.rwth-aachen.de> escribi?:

>> `os.devnull`?
>
> Yes, but I wasn't really sure how portable it is, in particular, on
> Windows.  So does
>
> open(os.devnull, "w").write("Schallalla")
>
> work on Windows like on Unix?

Yes. os.devnull=='nul' on Windows.

-- 
Gabriel Genellina



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Sep 21 03:19:40 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 21 Sep 2007 09:19:40 +0200
Subject: An Editor that Skips to the End of a Def
In-Reply-To: <e8HIi.3303$4J3.1378@newssvr22.news.prodigy.net>
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk>
	<tfAIi.51111$Um6.44314@newssvr12.news.prodigy.net>
	<YPGIi.54591$YL5.26012@newssvr29.news.prodigy.net>
	<874phou1pa.fsf@benfinney.id.au>
	<e8HIi.3303$4J3.1378@newssvr22.news.prodigy.net>
Message-ID: <46f3708c$0$32593$426a74cc@news.free.fr>

W. Watson a ?crit :
> How about in the case of MS Win?
> 
> Ben Finney wrote:
>>
>> (Please don't top-post. Instead, reply below each point to which
>> you're responding, removing quoted text irrelevant to your response.)
>>

Wayne, may I second Ben on his suggestion to stop top-posting ?


From modiinfo at gmail.com  Wed Sep 12 09:24:22 2007
From: modiinfo at gmail.com (Harshad Modi)
Date: Wed, 12 Sep 2007 13:24:22 -0000
Subject: encoding latin1 to utf-8
In-Reply-To: <1189465050.827331.211320@r34g2000hsd.googlegroups.com>
References: <1189427146.723304.270600@22g2000hsm.googlegroups.com>
	<1189465050.827331.211320@r34g2000hsd.googlegroups.com>
Message-ID: <1189603462.937669.257550@d55g2000hsg.googlegroups.com>

thx for response ,
i think, my file has wrong encoding format.
thanks for guide and advise



From orsenthil at gmail.com  Mon Sep  3 14:42:25 2007
From: orsenthil at gmail.com (O.R.Senthil Kumaran)
Date: Tue, 4 Sep 2007 00:12:25 +0530
Subject: ShowMeDo.com Announces Winner of Most-Video-Plays of the Month
In-Reply-To: <46DBC8D2.1000404@taupro.com>
References: <46DBC8D2.1000404@taupro.com>
Message-ID: <20070903184225.GA5632@gmail.com>

> ShowMeDo.com, a website offering over 361 instructional screencasts about
> topics both Python and non-Python, has announced their first winner of the
> month for the most-played video.  And the winner is:
> 
>      "Learn Django: Create a Wiki in 20 minutes"
> 
> by Siddharta Govindaraj, founder of Silver Stripe Software, with 1851 views in
> August, far outpacing the second-place entry.  The prize is a ?20 (UK) voucher
> to Amazon.  Congratulations, Siddhi!  You can watch it at:
> 
>   http://showmedo.com/videos/video?name=1100000&fromSeriesID=110
> 
> Siddhi is also helping Doug Napoleone with PyCon this year, providing a
> program for generating attendee badges and working to integrate it into the
> Django-based conference site.
> 
> You can find Siddhi at:
> 
>     http://siddhi.blogspot.com/
>     http://www.silverstripesoftware.com/
> 
> So who will win this month?  It could be you!  How about a screencast
> showcasing a different web framework like TurboGears or Twisted Web?  Or
> something about databases, either relational or object.
> 
> Jeff Rush
> Python Advocacy Coordinator
> 
> -- 

-- 
O.R.Senthil Kumaran
http://uthcode.sarovar.org


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Sep  5 12:57:55 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 05 Sep 2007 18:57:55 +0200
Subject: Text processing and file creation
References: <1189008809.718361.45790@g4g2000hsf.googlegroups.com>
	<1189009392.762504.87070@19g2000hsx.googlegroups.com>
Message-ID: <5k85ghF2hvr3U1@mid.individual.net>

 kyosohma at gmail.com wrote:

> I would use a counter in a for loop using the readline method to
> iterate over the 20,000 line file. 

file objects are iterables themselves, so there's no need to do that
by using a method.

> Reset the counter every 5 lines/ iterations and close the file. 

I'd use a generator that fetches five lines of the file per
iteration and iterate over it instead of the file directly.

> Have fun!

Definitely -- and also do your homework yourself :)

Regards,


Bj?rn

-- 
BOFH excuse #339:

manager in the cable duct



From software at ginstrom.com  Sat Sep 15 20:14:57 2007
From: software at ginstrom.com (Ryan Ginstrom)
Date: Sun, 16 Sep 2007 09:14:57 +0900
Subject: Python statements not forcing whitespace is messy?
In-Reply-To: <46EC3C6E.6050002@sdf.lonestar.org>
References: <1189884110.006272.240840@50g2000hsm.googlegroups.com>
	<46EC3C6E.6050002@sdf.lonestar.org>
Message-ID: <030b01c7f7f6$9de2cb10$0203a8c0@MOUSE>

> On Behalf Of J. Cliff Dyer
> On the other hand, this is just as bad:
> 
> [ ( y ) for ( x , y ) in [ ( "foo" , 2 ) , ( "bar" , 4 ) ] if 
> "foo" in ( x ) ]

I think that's allowed in order to recruit C/C++ programmers.

Regards,
Ryan Ginstrom



From wolf_tracks at invalid.com  Thu Sep 20 23:26:40 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Fri, 21 Sep 2007 03:26:40 GMT
Subject: Drawing a 640x480 Ras Image
Message-ID: <QRGIi.54592$YL5.52604@newssvr29.news.prodigy.net>

I'm getting a 640x480 greyscale image from a video device. I'd like to place 
it on a canvas and then draw on the image. Does PIL or some image facility 
allow me to do that?

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From http  Thu Sep 20 10:43:18 2007
From: http (Paul Rubin)
Date: 20 Sep 2007 07:43:18 -0700
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<dea92f560709021735l2c72d53ew94410fcb33b9b50b@mail.gmail.com>
	<mailman.303.1188779927.28954.python-list@python.org>
	<1190164166.378500.155990@o80g2000hse.googlegroups.com>
	<1190241711.344058.238380@57g2000hsv.googlegroups.com>
	<1190242799.954176.279440@22g2000hsm.googlegroups.com>
	<7xps0ew0a8.fsf@ruckus.brouhaha.com>
	<13f3roj6gdfq6b7@corp.supernews.com>
Message-ID: <7x1wctwg6x.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> writes:
> That's why your "comparatively wimpy site" preferred to throw extra web 
> servers at the job of serving webpages rather than investing in smarter, 
> harder-working programmers to pull the last skerricks of performance out 
> of the hardware you already had.

The compute intensive stuff (image rendering and crunching) has
already had most of those skerricks pulled out.  It is written in C
and assembler (not by us).  Only a small part of our stuff is written
in Python: it just happens to be the part I'm involved with.

> But Python speed ups don't come for free. For instance, I'd *really* 
> object if Python ran twice as fast for users with a quad-core CPU, but 
> twice as slow for users like me with only a dual-core CPU.

Hmm.  Well if the tradeoff were selectable at python configuration
time, then this option would certainly be worth doing.  You might not
have a 4-core cpu today but you WILL have one soon.

> What on earth makes you think that would be anything more than a 
> temporary, VERY temporary, shutdown? My prediction is that the last of 
> the machines wouldn't have even been unplugged

Of course that example was a reductio ad absurdum.  In reality they'd
use the speedup to compute 2x as much stuff, rather than ever powering
any servers down.  Getting the extra computation is more valuable than
saving the electricity.  It's just easier to put a dollar value on
electricity than on computation in an example like this.  It's also
the case for our specfiic site that our server cluster is in large
part a disk farm and not just a compute farm, so even if we sped up
the software infinitely we'd still need a lot of boxes to bolt the
disks into and keep them spinning.

> Now there's a thought... given that Google:
> 
> (1) has lots of money;
> (2) uses Python a lot;
> (3) already employs both Guido and (I think...) Alex Martelli and 
> possibly other Python gurus;
> (4) is not shy in investing in Open Source projects;
> (5) and most importantly uses technologies that need to be used across 
> multiple processors and multiple machines
> 
> one wonders if Google's opinion of where core Python development needs to 
> go is the same as your opinion?

I think Google's approach has been to do cpu-intensive tasks in other
languages, primarily C++.  It would still be great if they put some
funding into PyPy development, since I think I saw something about the
EU funding being interrupted.


From gigs at hi.t-com.hr  Thu Sep 20 06:48:14 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Thu, 20 Sep 2007 12:48:14 +0200
Subject: unittest tutorial
Message-ID: <fctj6d$4gk$1@ss408.t-com.hr>

does anyone know some good tutorial for unittest? (with examples how unit work)?



thank you


From kj7ny at nakore.com  Thu Sep 27 01:50:52 2007
From: kj7ny at nakore.com (kj7ny)
Date: Wed, 26 Sep 2007 22:50:52 -0700
Subject: How do I get the value out of a DOM Element
Message-ID: <1190872252.204687.286640@19g2000hsx.googlegroups.com>

I have been able to get xml.dom.minidom.parse('somefile.xml') and then
dom.getElementsByTagName('LLobjectID') to work to the point where I
get something like: [<DOM Element: LLobjectID at 0x13cba08>] which I
can get down to <DOM Element: LLobjectID at 0x13cba08> but then I
can't find any way to just get the value out from the thing!

.toxml() returns something like: u'<LLobjectID><![CDATA[1871203]]></
LLobjectID>'.

How do I just get the 1871203 out of the DOM Element?

Thanks,



From fakeaddress at nowhere.org  Sat Sep 22 01:17:50 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Fri, 21 Sep 2007 22:17:50 -0700
Subject: Sets in Python
In-Reply-To: <mailman.855.1190359579.2658.python-list@python.org>
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>	<CeB*qHeVr@news.chiark.greenend.org.uk>	<1190235483.412972.81280@v23g2000prn.googlegroups.com>	<13f3m15igkstq2e@corp.supernews.com>	<1190260923.243865.312190@z24g2000prh.googlegroups.com>	<13f4nclh902f78f@corp.supernews.com>
	<mailman.855.1190359579.2658.python-list@python.org>
Message-ID: <Jz1Ji.5487$7P7.2532@newssvr19.news.prodigy.net>

Gabriel Genellina wrote:
> En Thu, 20 Sep 2007 08:46:29 -0300, Steven D'Aprano 
> 
>> Another way is to use this class:
>>
>> class HashableList(list):
>>     def __hash__(self):
>>         return hash(tuple(self))
> 
> ...and that will stop working as soon as the list is mutated (which is 
> exactly what you said before)

Yup. I had suggested that technique in this thread, but it
doesn't really work. It hashes by state and compares by
state, but the actual key that a dict would store is the
object's identity. If the state has changed by the time
of a dict lookup, the dict will look in the hash-bucket
of the old state, but the object's equality test will
compare against the current state.
Bummer. Sorry.


-- 
--Bryan


From bdesth.quelquechose at free.quelquepart.fr  Fri Sep 21 20:16:32 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 22 Sep 2007 02:16:32 +0200
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <1190527642.681501.18900@57g2000hsv.googlegroups.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<1190413322.962737.53900@r29g2000hsg.googlegroups.com>
	<1190414192.636397.146450@57g2000hsv.googlegroups.com>
	<1190443748.907702.154660@22g2000hsm.googlegroups.com>
	<7xlkazgpc5.fsf@ruckus.brouhaha.com>
	<1190447257.060479.141280@n39g2000hsh.googlegroups.com>
	<5lk2olF8gic1U5@mid.uni-berlin.de>
	<1190454275.282176.90830@k79g2000hse.googlegroups.com>
	<zfCdndEutb_EG2jbnZ2dnUVZ_o3inZ2d@speakeasy.net>
	<1190527642.681501.18900@57g2000hsv.googlegroups.com>
Message-ID: <46f6ea13$0$32168$426a74cc@news.free.fr>

Kay Schluehr a ?crit :
> On 22 Sep., 23:17, Erik Max Francis <m... at alcyone.com> wrote:
> 
> 
>>The attribute and method (not made distinct in Io; they're called
>>"slots") is much the same as with Python; the current instance is
>>checked for the object, then its parents, then _its_ parents, and so on.
> 
> 
> Repeating the same point as Marc doesn't mean that I have to repeat my
> reply as well. Doesn't it?
> 
Then please don't answer my own repeating of the same point !-)


From jfine at pytex.org  Tue Sep 18 19:46:06 2007
From: jfine at pytex.org (Jonathan Fine)
Date: Wed, 19 Sep 2007 00:46:06 +0100
Subject: [ANN] Metatest 0.1.0
References: <mailman.721.1190126947.2658.python-announce-list@python.org>
	<87sl5by343.fsf@benfinney.id.au>
Message-ID: <46F0633E.7020304@pytex.org>

Ben Finney wrote:
> Jonathan Fine <jfine at pytex.org> writes:
> 
>>Here's how to write some tests using Metatest. We can think of the
>>tests as an executable specification.
>>
>>    from metatest.py.mymod import plus, Point
>>
>>    # Function plus adds two numbers.
>>    plus(2, 2) == 4
>>    plus(2, '', _ex=TypeError)
> 
> This second example seems counterintuitive. Is '_ex' part of the
> public interface? If so, why does it follow the convention for "not
> part of the public interface" (i.e. it is named with an underscore)?

Hello Ben

(Well, I'm glad you seem to find the first example intuitive.)

No, the function we are testing here is
     def plus(a, b):
         return a + b

However, the line
    plus(2, '', _ex=TypeError)
refers only indirectly to the function plus, to be imported from mymod.

Read again the line
    from metatest.py.mymod import plus, Point

We do some metapath magic and some __method__ tricks to ensure that here 
plus is what I have called a 'stub object', although 'unknown' would be 
a better term.  See
    http://metatest.sourceforge.net/doc/pyconuk2007/metatest.html#slide11
    http://www.python.org/dev/peps/pep-0302/

The line
      plus(2, '', _ex=TypeError)
causes something to be recorded, and when the test is run the _ex 
argument is filtered off, and the remaining arguments passed to the plus 
function, as imported from mymod.

This is done by the function split_kwargs in the module
http://metatest.cvs.sourceforge.net/metatest/metatest/py/metatest/player.py?view=markup

Hope this helps.  If not, maybe try downloading and running it.

Finally, if you can think of a better way of saying, in Python, "The 
function call plus(2, '') raises a TypeError", please let me know, and 
I'll consider using it in the next version of Metatest.

-- 
Jonathan






From rodney.maxwell at gmail.com  Sat Sep 15 11:39:59 2007
From: rodney.maxwell at gmail.com (Rodney Maxwell)
Date: Sat, 15 Sep 2007 15:39:59 -0000
Subject: Extended slicing and Ellipsis - where are they used?
In-Reply-To: <fcclfe$ur6$1@daisy.noc.ucla.edu>
References: <1189699345.436400.233460@g4g2000hsf.googlegroups.com>
	<fcclfe$ur6$1@daisy.noc.ucla.edu>
Message-ID: <1189870799.980905.5020@r29g2000hsg.googlegroups.com>

On Sep 13, 5:50 pm, James Stroud <jstr... at mbi.ucla.edu> wrote:
> Rodney Maxwell wrote:
> > The following are apparently legal Python syntactically:
> >    L[1:3, 8:10]
> >    L[1, ..., 5:-2]
>
> > But they don't seem to work on lists:
> >>>> l = [0,1,2,3]
> >>>> l[0:2,3]
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in <module>
> > TypeError: list indices must be integers
> >>>> l[...]
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in <module>
> > TypeError: list indices must be integers
>
> > So where is this extended slicing used?
>
> AFAICT this syntax is not used in the standard library. However, the
> mega-beauty of it is that you can make use of it in your own classes:
>
> py> class Bob(list):
> ...   def __getitem__(self, i):
> ...     try:
> ...       return [list.__getitem__(self, j) for j in i]
> ...     except TypeError:
> ...       return list.__getitem__(self, i)
> ...
> py> b = Bob(xrange(15, 30))
> py> b[3, 5, 7, 13]
> [18, 20, 22, 28]
>
> James

Or
>>> b[0:3, 5, 9]
[[15, 16, 17], 20, 24]

which is what I was looking for in the first place.

Thanks,
Rodney



From kyosohma at gmail.com  Thu Sep  6 16:00:49 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 06 Sep 2007 20:00:49 -0000
Subject: Finding specific date ranges
In-Reply-To: <mailman.180.1189107571.2658.python-list@python.org>
References: <1189090603.285778.282060@g4g2000hsf.googlegroups.com>
	<mailman.161.1189094229.2658.python-list@python.org>
	<1189099759.833051.253020@y42g2000hsy.googlegroups.com>
	<mailman.163.1189100515.2658.python-list@python.org>
	<1189101946.318748.99670@y42g2000hsy.googlegroups.com>
	<mailman.180.1189107571.2658.python-list@python.org>
Message-ID: <1189108849.016880.215270@o80g2000hse.googlegroups.com>

On Sep 6, 2:39 pm, Tim Golden <t... at timgolden.me.uk> wrote:
>
> > Anyway, your method is probably clearer to read whereas mine
>
>  > doesn't require anything to be imported.
>
> I think I've been a SQL & Python programmer for so long that
> I tend to do anything -- and sometimes too much -- to avoid
> messy loop/exit-when structures. On reflection, my code
> would be simplified by ignoring all the datetime.date stuff
> which is irrelevant for the purpose, since tuples will
> compare perfectly well. Also, I had to put the conditional
> in the loop because I didn't have data for every month. If
> you *knew* you had at least one period for each month and
> weren't fussed about, say, date arithmetic later on, it
> would be even simpler, just a min () function around
> a generator expression.
>


I'm getting pretty sick of for loops, flags and/or sentinel values. I
do *know* that there should be one (and only one) period per month
that applies. I just have to grab that period. I currently calculate
the date ranges on the fly based on the last date in the 2-value pair.
Ugh.

I've read an re-read about generators, but they seem to cause my mind
to go blank. It's like the related  with statement or decorators. I
just don't understand them well enough to implement them.


> Frankly, though, with code as small scale as this, it's
> far more important what *you* the programmer and any
> future maintainers will find easy to understand and use,
> and far less important how clever the code is or how
> fast it runs.

I agree. The simpler the code is to read and maintain, the better.
Clever, short code may be cool, but it can also be a pain to
troubleshoot.

Mike



From maxim.gavrilov at gmail.com  Sat Sep 22 21:07:27 2007
From: maxim.gavrilov at gmail.com (maxim.gavrilov at gmail.com)
Date: Sun, 23 Sep 2007 01:07:27 -0000
Subject: Small changes in side library
Message-ID: <1190509647.227883.226460@d55g2000hsg.googlegroups.com>

Hi, all!

May be this question have been already discussed, but I found nothing
closer :-/
I have the side library which provides wide set of different
functions, but I'm going to replace some of them with mine and
provided such 'modified' library thought my project.

The following way works well for my purpose:

------- mylib.py -------
import sidelib

import os, sys, ....

def func():
    .....
sidelib.func = func
......
?!?!?!?!
--------------------------

But this cause to write mylib.sidelib.func() to function call, is it
any way to 'map' definitions from sidelib to mylib (possible at point
marked ?!?!?!?!) such that constructions like mylib.func() will be
provided and client code don't see difference between changed and
original library in syntax way?

One my idea was to do from sidelib import * and then modify globals()
dictionary, but this isn't good too because mylib imports many other
modules and they all mapped into it's namespace (like mylib.os,
mylib.sys).

Thanks for attention!



From f.guerrieri at gmail.com  Tue Sep 18 08:40:57 2007
From: f.guerrieri at gmail.com (Francesco Guerrieri)
Date: Tue, 18 Sep 2007 14:40:57 +0200
Subject: Wait For Application Start
In-Reply-To: <120025966304300060@unknownmsgid>
References: <120025966304300060@unknownmsgid>
Message-ID: <79b79e730709180540q2045a086rc6a049f16bd7e7ad@mail.gmail.com>

On 9/18/07, Robert Rawlins - Think Blue
<robert.rawlins at thinkbluemedia.co.uk> wrote:
> This seems like a very logical method, but I'm not sure how to implement it
> into my python code? Is there a simple way to make it wait for that file?
> Without the need to build my own conditional loop?

I'm not sure why how you could avoid a conditional loop. Could
something like this work?

import os.path
import time

while True:
    if os.path.exists(YOUR_FILE):
        break
    time.sleep(30)

francesco


From limodou at gmail.com  Thu Sep 13 09:35:32 2007
From: limodou at gmail.com (limodou)
Date: Thu, 13 Sep 2007 21:35:32 +0800
Subject: wxstyledtextctrl and xml markup
In-Reply-To: <1189689993.338662.267340@k79g2000hse.googlegroups.com>
References: <mailman.478.1189682613.2658.python-list@python.org>
	<1189689993.338662.267340@k79g2000hse.googlegroups.com>
Message-ID: <505f13c0709130635g5cb3e843m700a098bedc41dbd@mail.gmail.com>

> I highly recommend the wxPython mailing list. Right now it is down
> (see their website), but when it's back up (check their website for
> news), that's where I'd post this question if no one else here
> answers.
>
wxPython mail list already comes back!

-- 
I like python!
UliPad <<The Python Editor>>: http://code.google.com/p/ulipad/
My Blog: http://www.donews.net/limodou


From koutoo at hotmail.com  Tue Sep 18 14:33:15 2007
From: koutoo at hotmail.com (koutoo at hotmail.com)
Date: Tue, 18 Sep 2007 11:33:15 -0700
Subject: Newbie question
In-Reply-To: <mailman.732.1190140272.2658.python-list@python.org>
References: <1190139661.046103.45440@19g2000hsx.googlegroups.com>
	<mailman.732.1190140272.2658.python-list@python.org>
Message-ID: <1190140395.567419.16280@k79g2000hse.googlegroups.com>

On Sep 18, 1:31 pm, "Shawn Milochik" <Sh... at Milochik.com> wrote:
> On 9/18/07, kou... at hotmail.com <kou... at hotmail.com> wrote:
>
> > If I have a file name: AVC1030708.14.  How do I strip out certain
> > characters from the file name?  I am so used to using MID, LEFT, and
> > RIGHT functions, that I have no idea how to do this in python?  I have
> > had trouble as well with most newbies on finding the help.  But I have
> > used the command line built in help, but with no luck.  Thanks.
>
> > Kou
>
> Do you want to strip out specific characters, characters in specific
> positions, or characters matching certain patterns?

Yes, I want specific characters in specific positions.



From aahz at pythoncraft.com  Mon Sep 17 21:05:34 2007
From: aahz at pythoncraft.com (Aahz)
Date: 17 Sep 2007 18:05:34 -0700
Subject: simple regular expression problem
References: <1190034041.796626.66790@n39g2000hsh.googlegroups.com>
Message-ID: <fcn88u$4bo$1@panix3.panix.com>

In article <1190034041.796626.66790 at n39g2000hsh.googlegroups.com>,
duikboot  <dijkstra.arjen at gmail.com> wrote:
>
>I am trying to extract a list of strings from a text. I am looking it
>for hours now, googling didn't help either.

To emphasize the other answers you got about avoiding regexps, here's a
nice quote from my .sig database:

'Some people, when confronted with a problem, think "I know, I'll use
regular expressions."  Now they have two problems.'  --Jamie Zawinski
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

The best way to get information on Usenet is not to ask a question, but
to post the wrong information.


From Mihai.Grecu at gmail.com  Mon Sep 24 08:12:24 2007
From: Mihai.Grecu at gmail.com (mihai)
Date: Mon, 24 Sep 2007 12:12:24 -0000
Subject: python variable assignement
In-Reply-To: <mailman.975.1190630140.2658.python-list@python.org>
References: <1190628822.472242.272900@19g2000hsx.googlegroups.com>
	<mailman.975.1190630140.2658.python-list@python.org>
Message-ID: <1190635944.655293.38290@y42g2000hsy.googlegroups.com>


This is the code:

begin = select_point()
if begin == None:
        return

end = select_point()
while end != None:
        record = Record(begin, end)
        id = add(record)
        begin = end
        end = select_point()
        # here (sometimes) begin has the same value (or points to the
same object) like end, the newly selected one

Is there a way to see if the names points to the same variables or
that there are different variables with the same values?

The problem is that the problem is more like an bug,
it happens only in certain conditions, and I have no idea why.

I have checked the values returned by select_point() and are different
in all the cases,
so the problem is with that variables names/values.

Thank you again,
Mihai.



From usenet at nicko.org  Sat Sep  1 10:42:39 2007
From: usenet at nicko.org (Nicko)
Date: Sat, 01 Sep 2007 07:42:39 -0700
Subject: list index()
In-Reply-To: <mailman.151.1188496838.28954.python-list@python.org>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
	<mailman.151.1188496838.28954.python-list@python.org>
Message-ID: <1188657759.339661.324070@r34g2000hsd.googlegroups.com>

On Aug 30, 7:00 pm, Steve Holden <st... at holdenweb.com> wrote:

> You can also generate the files that are in one directory but ot the
> other with
>
> (afiles | bfiles) - (afiles & bfiles)

Or just (afiles ^ bfiles).

    Nicko

--
(lambda f: lambda *a:f(f,*a))(
    lambda f,l,i:l[i][1]+f(f,l,l[i][0]) if l[i][0]>0 else "")(
    sorted(enumerate('~ooiirnncc at -kk.og'),key=lambda a:a[1]),0)[1:]



From richardjones at optushome.com.au  Fri Sep 28 19:08:00 2007
From: richardjones at optushome.com.au (Richard Jones)
Date: Sat, 29 Sep 2007 09:08:00 +1000
Subject: Python 3.0 migration plans?
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>
	<%q0Li.725$ih1.539@nlpi068.nbdc.sbc.com>
	<1i555ag.9ez4uvf4583jN%aleax@mac.com>
	<ns9Li.1172$4V6.1092@newssvr14.news.prodigy.net>
Message-ID: <46fd8950$0$15142$afc38c87@news.optusnet.com.au>

John Nagle wrote:
>      Insofar as Python has an organization, it's not adequately managing
> extension modules.  Each extension module has its own infrastructure,
> with its own build procedures, its own bug list, and its own maintainers.
> There's not even an archive.  Unlike CPAN, Cheese Shop is just a directory
> of URLs.

Ah, it's not usenet without someone speaking from ignorance! :)


    Richard



From bdesth.quelquechose at free.quelquepart.fr  Sat Sep 29 11:46:26 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 29 Sep 2007 17:46:26 +0200
Subject: New to python
In-Reply-To: <1191126010.260942.89230@y42g2000hsy.googlegroups.com>
References: <1191126010.260942.89230@y42g2000hsy.googlegroups.com>
Message-ID: <46ffe5d3$0$26294$426a74cc@news.free.fr>

Googy a ?crit :
> I am new to python...
> 
> The programming language i know well is C
> Can any one recommend me the good ebook for beginners. I have loads of
> ebooks but i am not able to decide which to start with which book.
> Also i am learning XML so later on i can switch to books on Python and
> XML but initially which book to read??

The canonical answer is:
- the official tutorial
- dive into python



From daniel.j.larsson at gmail.com  Wed Sep  5 15:55:52 2007
From: daniel.j.larsson at gmail.com (Daniel Larsson)
Date: Wed, 5 Sep 2007 21:55:52 +0200
Subject: concise code (beginner)
In-Reply-To: <1189020188.842700.50950@d55g2000hsg.googlegroups.com>
References: <13dsvqrqivtf092@corp.supernews.com>
	<fbmrsg$dsi$1@daisy.noc.ucla.edu>
	<1189020188.842700.50950@d55g2000hsg.googlegroups.com>
Message-ID: <2bfa72fa0709051255o79c86c44pbeddf87fe55fe802@mail.gmail.com>

On 9/5/07, Karthik Gurusamy <kar1107 at gmail.com> wrote:
>
> On Sep 5, 11:17 am, James Stroud <jstr... at mbi.ucla.edu> wrote:
> > bambam wrote:
> > > I have about 30 pages (10 * 3 pages each) of code like this
> > > (following). Can anyone suggest a more compact way to
> > > code the exception handling? If there is an exception, I need
> > > to continue the loop, and continue the list.
> >
> > > Steve.
> >
> > > -----------------------------------
> > > for dev in devs
> > >     try:
> > >         dev.read1()
> > >     except
> > >         print exception
> > >         remove dev from devs
> >
> > > for dev in devs
> > >     try:
> > >         dev.read2()
> >
> > [etc.]
> >
> > My keen sense of pattern recognition tells me that all of your read's
> > follow the same naming pattern--or was that just an accidental naming
> > coincidence on your part for the sake of example?
> >
> > for i in xrange(number_of_reads):
> >    for dev in devs:
> >      try:
> >        _reader = getattr(dev, 'read%d' % i)
> >        _reader()
> >      except Exception, e:
> >        print e
> >        devs.remove(dev)
>
> I see in many of the solutions suggested above, the devs sequence/
> iterator is being modified while iterating. I know it is not defined
> for interation over dictionary keys. Are they defined for other
> collections like lists?
>
> Karthik


You're  right, that's a bad thing. You should collect the "bad" devs in a
separate list, and remove them outside the loop.
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From knipknap at gmail.com  Thu Sep  6 12:22:39 2007
From: knipknap at gmail.com (Samuel)
Date: Thu, 06 Sep 2007 16:22:39 -0000
Subject: ImportError depending on the calling module
In-Reply-To: <1189095236.413270.288090@50g2000hsm.googlegroups.com>
References: <1189079269.279716.254560@50g2000hsm.googlegroups.com>
	<1189093482.137051.73770@r29g2000hsg.googlegroups.com>
	<1189095236.413270.288090@50g2000hsm.googlegroups.com>
Message-ID: <1189095759.095051.252360@y42g2000hsy.googlegroups.com>

On Sep 6, 6:13 pm, Samuel <knipk... at gmail.com> wrote:
> Why does it matter whether I install it in sys.path or whether
> sys.path is modified? What's the difference?
>
> What I am doing is I ship two modules in one tarball with my software.
> The software is only unpacked and ran. It has to work without
> installation.

I see now how this works; when a script is ran, only the top-level of
the current module is searched. Now that's just ugly, but well... at
least I now know how to work around this.

Thanks,
-Samuel



From nagle at animats.com  Tue Sep  4 11:18:04 2007
From: nagle at animats.com (John Nagle)
Date: Tue, 04 Sep 2007 15:18:04 GMT
Subject: FCGI app reloading on every request
In-Reply-To: <s7ovq4-3eb.ln1@nb2.stroeder.com>
References: <46DCDE59.8060109@animats.com> <46DCE052.40708@v.loewis.de>
	<HG5Di.1553$Sd4.772@nlpi061.nbdc.sbc.com>
	<s7ovq4-3eb.ln1@nb2.stroeder.com>
Message-ID: <MGeDi.23889$eY.15563@newssvr13.news.prodigy.net>

Michael Str?der wrote:
> John Nagle wrote:
> 
>>    What's actually happening is that FCGI isn't running at all.
>>My .fcgi file is being executed by Apache's CGI handler, and
>>"fcgi.py" recognizes this, then reads the parameters as if
>>a CGI program.  So it works just like a CGI program: one
>>load per request.  Not sure why Apache is doing that yet.
>>I'm looking at Apache configuration files now.
> 
> 
> Are you running mod_fastcgi oder mod_fcgid?

    I'm using mod_fcgid.

    This is running on a dedicated server at APlus.net,
running Red Hat Fedora Core 6, Python 2.5, and managed with Plesk 8.2.
I just turned on fcgid from the Plesk control panel ("Physical hosting
setup page for domain", checked "FastCGI"), and enabled the standard
FCGI configuration, which is actually mod_fcgid.

    The Python app is launched from "cgi-bin" with a file ending in
".fcgi".  It uses Alan Saddi's "fcgi.py" module to interface with
an FCGI server.  Python programs that use "fcgi.py" will also run
as standard CGI programs, for debug purposes.  And that's what's
happening.  I modified my test Python program to patch
"fcgi.CGIrequest._end" with a version that logged its calls,
and that's being called.  This indicates that "fcgi.py" is running
in CGI mode, not FCGI mode.  My test program is reloaded for every
HTTP request, as indicated by debug output, so it really is running
in CGI mode, with the expected low performance.

   What's wierd is that the ".fcgi" suffix files get executed at all.
I'd expect them to be either ignored or run properly with FCGI.

				John Nagle




From steveo at syslang.net  Mon Sep 10 11:46:42 2007
From: steveo at syslang.net (Steven W. Orr)
Date: Mon, 10 Sep 2007 11:46:42 -0400 (EDT)
Subject: Python syntax wart
In-Reply-To: <5kkdsrF3vfqqU5@mid.uni-berlin.de>
References: <fbvvil$7dj$1@lust.ihug.co.nz> <5khh6nF3i5nuU1@mid.uni-berlin.de>
	<46E390B7.2080808@web.de> <fc0518$aa2$5@lust.ihug.co.nz>
	<5ki2sdF3nr68U1@mid.individual.net> <fc2c52$i1l$3@lust.ihug.co.nz>
	<5kk8p0F3vfqqU1@mid.uni-berlin.de> <fc2t89$rik$4@lust.ihug.co.nz>
	<5kkcmvF3vfqqU3@mid.uni-berlin.de> <fc2uls$shh$2@lust.ihug.co.nz>
	<5kkdsrF3vfqqU5@mid.uni-berlin.de>
Message-ID: <alpine.LFD.0.9999.0709101145440.30806@saturn.syslang.net>

On Monday, Sep 10th 2007 at 08:34 -0000, quoth Marc 'BlackJack' Rintsch:

=>On Mon, 10 Sep 2007 20:19:08 +1200, Lawrence D'Oliveiro wrote:
=>
=>> In message <5kkcmvF3vfqqU3 at mid.uni-berlin.de>, Marc 'BlackJack' Rintsch
=>> wrote:
=>> 
=>>> I see a tree structure here ...
=>> 
=>> Good, you're improving.
=>
=>Thanks.
=>
=>>> ... but still no table. 
=>> 
=>> Who said anything about a table?
=>
=>Me. If that statement is 2D I expected to see a table structure.  And I
=>don't mean that the source code itself is arranged in lines and columns
=>but that the so called *2D statement* can be seen as table.
=>
=>>> And this is also easily written that way in Python if you don't insist on
=>>> the line break after the ``if`` or can live with backslashes.
=>> 
=>> Which is precisely the point.
=>
=>Then is the lack of curly braces also a syntax wart.  Maybe you should
=>switch to a different language or write a preprocessor.

C'mon	give	the
	poor	guy
a		break.

What		did
	I	just
say		?

-- 
Time flies like the wind. Fruit flies like a banana. Stranger things have  .0.
happened but none stranger than this. Does your driver's license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren't a hypothetical question?
steveo at syslang.net


From iclark at mail.ewu.edu  Thu Sep 13 17:06:40 2007
From: iclark at mail.ewu.edu (Ian Clark)
Date: Thu, 13 Sep 2007 14:06:40 -0700
Subject: sys.argv index out of range error
In-Reply-To: <93066C069973ED448DC2BCEA9C44A7383BE33A@efmailx>
References: <93066C069973ED448DC2BCEA9C44A7383BE33A@efmailx>
Message-ID: <fcc8p1$hjb$1@sea.gmane.org>

Brian McCann wrote:
> init.sh
> 
> #!/bin/sh
> WORKSPACE_ROOT="$1";
> 
> export JAVA_OPTIONS="-Djava.library.path=$WORKSPACE_ROOT/:$WORKSPACE_ROOT/:$WORKSPACE_ROOT/"
> echo "JAVA_OPTIONS="$JAVA_OPTIONS;
>  
> set PATH="$WORKSPACE_ROOT/vendor/basistech/rlp5.4/rlp/bin/ia32-glibc23-gcc32:$WORKSPACE_ROOT/vendor/basistech/rlp5.4/rlp/bin/ia32-w32-msvc71:$WORKSPACE_ROOT/lib/core:$PATH"

Taken from `help set` (at the bottom of the page; emphasis mine):
   Using + rather than - causes these flags to be turned off.  The
   flags can also be used upon invocation of the shell.  The current
   set of flags may be found in $-.  *The remaining n ARGs are positional
   parameters and are assigned, in order, to $1, $2, .. $n.  If no
   ARGs are given, all shell variables are printed.*

Short answer: change set to export.

Slightly longer answer:
What this invocation of set is doing is setting the shell variable PATH 
to the value you give *and* setting the $1 variable to the same value 
and removing all other numbered variables. So if you put a print $2 
after `source init.sh $1` in bootstrap.sh you'll notice it's blank, as 
set is removing it.

The reason this happens when you source the file rather than just 
calling it is that when you source a file it runs in the current shell. 
So calling set then wipes out all the other numbered variables. When 
simply calling the script it creates a subshell where those things still 
happen, just not in the parent shell.

Ian



From http  Mon Sep 24 04:48:17 2007
From: http (Paul Rubin)
Date: 24 Sep 2007 01:48:17 -0700
Subject: Would Anonymous Functions Help in Learning Programming/Python?
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<1190413322.962737.53900@r29g2000hsg.googlegroups.com>
	<fd7r7s$n3o$2@lust.ihug.co.nz>
Message-ID: <7xvea0xxda.fsf@ruckus.brouhaha.com>

Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> writes:
> The fact that Python has difficulties is purely a demonstration of the
> limitations of indentation-controlled syntax, not a criticism of the
> concept itself.

Not even.  Haskell has indentation syntax (they call it "layout")
but can have multi-line function definitions inside expressions.


From python at cx.hu  Wed Sep  5 15:59:11 2007
From: python at cx.hu (Ferenczi Viktor)
Date: Wed, 5 Sep 2007 21:59:11 +0200
Subject: Any syntactic cleanup likely for Py3? And what about doc
	standards?
In-Reply-To: <46DEFD2E.5050205@sbcglobal.net>
References: <46DEFD2E.5050205@sbcglobal.net>
Message-ID: <200709052159.11316.python@cx.hu>

Hi!

> The reading I've done so far on Python 3 (alpha announcement, meta-PEP,
> some other PEPs) is generally encouraging, but there doesn't seem to be
> much on cleaning up the syntax, which has become uglier over time as
> features have been added on to an original syntax that wasn't designed
> to support them. It seems to me (from what little I've read--I admit
> that it's impossible to know for sure without experimenting quite a bit,
> for which I don't currently have the time) that new features such as
> multimethods might just make things more confusing (especially for
> newbies) in a lot of ways, without appropriate syntactic support.

There are some cleanups, such as the new class decorators and function 
annotation syntax. Both of them provides a common, much better solution 
instead of current weird solutions, such as metaclasses and specially 
formatted docstrings. Since Python currenty has a very nice syntax it cannot 
be cleaned up much further.

> Currently the most obvious example of this is Python 2.5's way of
> defining properties, which is ugly. leads often to writing of
> unnecessary code, and certainly doesn't make property code clear to a
> reader. Contrast this to the way properties (things that look like an
> instance variable but are actually bound to methods) are handled in Ruby
> and (IIRC, this also does a decent job) C#.
> On the other hand, it does seem that some new syntactic support for
> other features will be added, so perhaps I'm just missing whichever PEPs
> talk about going back and adding cleaner syntax for existing features...?

Class decorators allows clean implementation of properties.
Detailed description: http://www.python.org/dev/peps/pep-3129/
Lets use a hypothetic library providing properties, for example:

from property_support import hasProperties, Property

@hasProperties
class Sphere(object):
    def setRadius(self, value):
        ... some setter implementation ...
    radius=Property(default=1.0, set=setRadius, type=(int, float))
    color=Property(default='black', allowNone=True)

This is a cleaner syntax if you need automatic default setter/getter 
implementations with type checking, default values, etc. You can optionally 
override/extend some of the default implementations. This could be 
implemented by a third party library using class decorators and need not be 
restricted by a strict syntax in the language itself. This is a good design 
choice from my point of view, since it does not require the introduction of 
new symbols into the syntax, fully dynamic and inspected at runtime.

> Finally, another thing I've perhaps missed, but I can't see anything in
> what I've gone through, about correcting of of what I see to be one of
> Python's most long-standing really serious flaws, which is the lack of
> an official standard documentation markup syntax for writing
> documentation in code. This isn't even a matter of getting something
> developed, it's simply a matter of Guido and the Powers That Be
> bestowing their benediction on one of the several adequate or better
> documentation toolsets out there, so that more of us (slowly) start
> using it. Eventually this will result in work on the toolset itself,
> more people will be willing to use it, and there'll be a nice virtuous
> circle. Given how much more capable D'Oxygen is than any of the
> Python-specific solutions, I'd vote for D'Oxygen myself, but I'd prefer
> to have almost anything fill in this vacuum, rather than continue things
> the way they are.

Maybe the community should ask Guido to suggest a
"preferred" tool for documenting Python code.

Regars, Viktor


From kar1107 at gmail.com  Wed Sep  5 15:23:08 2007
From: kar1107 at gmail.com (Karthik Gurusamy)
Date: Wed, 05 Sep 2007 12:23:08 -0700
Subject: concise code (beginner)
In-Reply-To: <fbmrsg$dsi$1@daisy.noc.ucla.edu>
References: <13dsvqrqivtf092@corp.supernews.com>
	<fbmrsg$dsi$1@daisy.noc.ucla.edu>
Message-ID: <1189020188.842700.50950@d55g2000hsg.googlegroups.com>

On Sep 5, 11:17 am, James Stroud <jstr... at mbi.ucla.edu> wrote:
> bambam wrote:
> > I have about 30 pages (10 * 3 pages each) of code like this
> > (following). Can anyone suggest a more compact way to
> > code the exception handling? If there is an exception, I need
> > to continue the loop, and continue the list.
>
> > Steve.
>
> > -----------------------------------
> > for dev in devs
> >     try:
> >         dev.read1()
> >     except
> >         print exception
> >         remove dev from devs
>
> > for dev in devs
> >     try:
> >         dev.read2()
>
> [etc.]
>
> My keen sense of pattern recognition tells me that all of your read's
> follow the same naming pattern--or was that just an accidental naming
> coincidence on your part for the sake of example?
>
> for i in xrange(number_of_reads):
>    for dev in devs:
>      try:
>        _reader = getattr(dev, 'read%d' % i)
>        _reader()
>      except Exception, e:
>        print e
>        devs.remove(dev)

I see in many of the solutions suggested above, the devs sequence/
iterator is being modified while iterating. I know it is not defined
for interation over dictionary keys. Are they defined for other
collections like lists?

Karthik

>
> James
>
> --
> James Stroud
> UCLA-DOE Institute for Genomics and Proteomics
> Box 951570
> Los Angeles, CA 90095
>
> http://www.jamesstroud.com/




From roy at panix.com  Sun Sep  9 15:08:42 2007
From: roy at panix.com (Roy Smith)
Date: Sun, 09 Sep 2007 15:08:42 -0400
Subject: Re‭: ‬Modul‭ (%) ‬in python not like in C‭?‬
References: <mailman.294.1189364475.2658.python-list@python.org>
Message-ID: <roy-1B651D.15084209092007@news.panix.com>

In article??? <???mailman.294.1189364475.2658???.???python-list at python.org???>,???
??? "???Dotan Cohen???" <???dotancohen at gmail.com???> ???wrote???:???

???> ???FIrst of all???, ???how is the??? % ???symbol??? (???as in 70%6???=???4???) ???called in English???????

It's called??? "???modulo???", ???but most people pronounce it??? "???mod???".???

It's documented at http???://???docs.python.org/ref/binary.html


From xkenneth at gmail.com  Fri Sep 28 13:30:52 2007
From: xkenneth at gmail.com (xkenneth)
Date: Fri, 28 Sep 2007 17:30:52 -0000
Subject: Can I overload the compare (cmp()) function for a Lists ([]) index
	function?
Message-ID: <1191000652.430036.288400@y42g2000hsy.googlegroups.com>

Looking to do something similair. I'm working with alot of timestamps
and if they're within a couple seconds I need them to be indexed and
removed from a list.
Is there any possible way to index with a custom cmp() function?

I assume it would be something like...

list.index(something,mycmp)

Thanks!



From bj_666 at gmx.net  Sat Sep 15 20:00:09 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 16 Sep 2007 00:00:09 GMT
Subject: string questions
References: <mailman.597.1189900374.2658.python-list@python.org>
Message-ID: <5l3a09F5v20uU2@mid.uni-berlin.de>

On Sat, 15 Sep 2007 19:52:47 -0400, Shawn Minisall wrote:

> Hi everyone, I'm a beginning programming student in Python and have a 
> few questions regarding strings.
> 
> If s1 = "spam"
> 
> If s2 = "ni!"
> 
> 1. Would string.ljust(string.upper(s2),4) * 3 start it at the left 
> margin and move it 12 spaces to the right because of the 4 *3?  If so, 
> why is it in the parathesis for the upper command and not the ljust?   I 
> already know that it would cap it to NI!

Fire up the interpreter and just try it.  And then the different parts to
know whats going on in detail.

But please don't use the functions in `string` that are also available as
methods on strings.  Those functions are deprecated.

> 2.  To get the output "Spam Ni! Spam Ni! Spam Ni!" I could do something 
> like this string.join ([s1, s2]),
> 
> But I'm a little lost how to get it repeated three times on one line.  
> Would I  just have to put the same command on the next two lines?

Try out the code from 1. and you should get an idea ho to repeat three
times.

> 3. To change spam to spm, the string.replace seems to be the best 
> function to use.  However, when I use
> string.replace(s1, "a", " ") in python to replace a with an empty space, 
> it doesn't work...I just get spam back when I print s1.   Any ideas?

Yes, read the documentation to find out that `replace()` does not alter the
string -- strings in Python are immutable -- but returns a new, changed
string.

Ciao,
	Marc 'BlackJack' Rintsch


From namesagame-usenet at yahoo.com  Fri Sep 28 15:57:49 2007
From: namesagame-usenet at yahoo.com (gamename)
Date: Fri, 28 Sep 2007 12:57:49 -0700
Subject: C Source Code Generator For Test Cases
In-Reply-To: <5m51iuFbao07U1@mid.uni-berlin.de>
References: <1191001738.456766.176050@n39g2000hsh.googlegroups.com>
	<5m51iuFbao07U1@mid.uni-berlin.de>
Message-ID: <1191009469.736521.39210@k79g2000hse.googlegroups.com>

>
> How about using c-types to access your C-stuff to test, and use python + the
> testcase-tables to invoke that?
>

Sure, that's possible.  But the source code for tests (once all the
parms are read)
still needs to be generated.  Calling the lib from python or from C,
there still
needs to be a way to generate 100+ test routines. ;-)

-T



From torerik81 at gmail.com  Thu Sep 20 13:21:22 2007
From: torerik81 at gmail.com (=?ISO-8859-1?Q?Tor_Erik_S=F8nvisen?=)
Date: Thu, 20 Sep 2007 19:21:22 +0200
Subject: Tapping into the access of an int instance
Message-ID: <96f089100709201021m25e2243ey5fb9fa48917c3bc0@mail.gmail.com>

Hi,

Does anyone know how to interrupt the lookup of an integer value? I
know I need to subclass int, since builtin types can't be altered
directly...

Below is how far I've come... What I want is to tap into the access of
instance i's value 1...

>>> class Int(int):
	def __init__(self, *a, **k):
		super(Int, self).__init__(self, *a, **k)

		
>>> i = Int(1)
>>> i
1

Regards,
Tor Erik


From madzientist at gmail.com  Tue Sep 11 00:24:48 2007
From: madzientist at gmail.com (madzientist)
Date: Mon, 10 Sep 2007 21:24:48 -0700
Subject: newbie: stani's python editor if-else
Message-ID: <1189484688.520933.25000@22g2000hsm.googlegroups.com>


hi,

two quick questions:

a) i am using SPE (latest version) and for some reason, when i type,
say

if 1==2:
    print "not equal"
    else:
          print "equal"

the else is at the same indentation level as the preceding print
statement, and i get a syntax error

why doesn't spe automatically put the else at the level of the if
statement ? what am i dong wrong ? once i manually change the
indentation, the code snippet runs perfectly.

b) if this is not the group for such elementary questions, please do
let me know.

thanks !!!!

suresh



From imageguy1206 at gmail.com  Fri Sep  7 12:25:02 2007
From: imageguy1206 at gmail.com (imageguy)
Date: Fri, 07 Sep 2007 09:25:02 -0700
Subject: py2exe - change name of exe created
In-Reply-To: <mailman.224.1189174965.2658.python-list@python.org>
References: <1189164934.705547.156670@r34g2000hsd.googlegroups.com>
	<1189165183.727542.47640@19g2000hsx.googlegroups.com>
	<mailman.224.1189174965.2658.python-list@python.org>
Message-ID: <1189182302.680374.172940@k79g2000hse.googlegroups.com>

On Sep 7, 11:22 am, Thomas Heller <thel... at ctypes.org> wrote:
> imageguy schrieb:
>
>
>
>
>
> > Sorry for the double post, sent it to quickly.
>
> > I have a setup script like this;
>
> > setup(windows = [{"script":"myprogram.py",
> >                    "icon_resources":[(0,"nabbitt.ico")],
> >                     "other_resources": [(24,1,manifest)]}
> > ],
> >                 name = "My Program ver 0.1",
> >                 data_files = [("",rootdata)],
> >                 zipfile = None,
> >                 options = {"py2exe": {
> >                                        "compressed" : 1,
> >                                        "dll_excludes":
> > ["w9xpopen.exe"],
> >                                         "bundle_files": 3
> >                                                 }
> >                         },
> >                 )
>
> > Note that every thing works fine with this and creates an exe program
> > called
> > "myprogram.exe"
>
> > I would like to setup program to create an output called;
> > "MyBestProgram.exe"
>
> > IS that at all possible ?
>
> Yes.  Use a 'dest_base' key in the dictionary, like so:
>
> > setup(windows = [{"script":"myprogram.py",
> >                    "icon_resources":[(0,"nabbitt.ico")],
>
>                      "dest_base": "MyBestProgram",>                     "other_resources": [(24,1,manifest)]}
>
> ...
>
> 'dest_base' is the basename of the destination program that py2exe creates.
>
> Thomas- Hide quoted text -
>
> - Show quoted text -

Thanks.
I really appreciate the response.
Where would I find that in the docs ?  Thought I had searched
everywhere.

G.



From RoryBecker at newsgroup.nospam  Tue Sep 11 13:32:05 2007
From: RoryBecker at newsgroup.nospam (Rory Becker)
Date: Tue, 11 Sep 2007 17:32:05 +0000 (UTC)
Subject: Car-ac-systems
References: <cd6dnW0Vf8-wOnvbRVnyhwA@eclipse.net.uk>
Message-ID: <b0ac48a01b8bb8c9c2b92ff03bf0@msnews.microsoft.com>

> Thats all it is.  It may have been a usefully intended resource once,
> but they have no controls whatsoever.  Its time someone closed it
> down.

Some would say the same thing about email or the internet at large. 

It doesn't make it true.

Pick almost any community facility and you will find elements of the community 
that would vandelise it or treat it like Sh*t.

Luckily you don't have to subscribe to all the blogs on blogspot. you can 
pick just the ones that interest you.

:)

--
Rory




From m.n.summerfield at googlemail.com  Wed Sep 26 07:02:18 2007
From: m.n.summerfield at googlemail.com (Mark Summerfield)
Date: Wed, 26 Sep 2007 11:02:18 -0000
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <87fy11lo22.fsf@mulj.homelinux.net>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>
	<1190753722.026806.254530@d55g2000hsg.googlegroups.com>
	<1190756003.292096.71130@o80g2000hse.googlegroups.com>
	<1190789981.385466.37870@57g2000hsv.googlegroups.com>
	<Xns99B760A3F5859duncanbooth@127.0.0.1>
	<87sl51lshd.fsf@mulj.homelinux.net>
	<1190799759.367001.106400@r29g2000hsg.googlegroups.com>
	<87fy11lo22.fsf@mulj.homelinux.net>
Message-ID: <1190804538.469582.96950@22g2000hsm.googlegroups.com>

On 26 Sep, 11:27, Hrvoje Niksic <hnik... at xemacs.org> wrote:
> Mark Summerfield <m.n.summerfi... at googlemail.com> writes:
> > On 26 Sep, 09:51, Hrvoje Niksic <hnik... at xemacs.org> wrote:
> >> Duncan Booth <duncan.bo... at invalid.invalid> writes:
> >> > I that's the point though: you can't write one implementation
> >> > that has good performance for all patterns of use
>
> >> An implementation of sorted dict using a balanced tree as the
> >> underlying data structure would give decent performance in all the
> >> mentioned use cases.  For example, red-black trees search, insert, and
> >> delete in O(log n) time.
>
> > Basically, as implemented, I have to invalidate if there is any
> > change [...]
>
> No argument here, as long as the limitation is understood to be a
> consequence of the current implementation model.  Seriously proposing
> a sorteddict that is a mere syntactic sugar over dict dooms the PEP to
> rejection.

On the Py3K list GvR made it clear that sorteddict wouldn't be in
Python until an implementation had been in popular use for some
time... so I will not put forward a PEP for it.

> Major programming language libraries have included sorted mapping and
> set types for a while now, making the performance and complexity
> constraints generally well understood.  We should make use of that
> knowledge when designing sorteddict.

I know! I use Python and C++ and Qt, so what with the STL and Qt's
containers I'm used to having far more containers to choose from than
Python offers. I think Python could do with both sorteddict and
sortedset in the collections module, but to get decent performance
will require a balanced tree (or a skiplist) implementation, and I
don't have the time to do that. Apart from Antoon Pardon's AVL tree,
there's also Chris Gonnerman's RBTree, also pure Python, with a dict
API and that seems to accept a cmp function, but again, I don't know
whether it could be adapted to the sorteddict((mapping | sequence |
nothing), cmp=None, key=None, reverse=None) API that Paul Hankin
described.



From deets at nospam.web.de  Thu Sep 20 02:04:38 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 20 Sep 2007 08:04:38 +0200
Subject: python-mcrypt install on Mac OSX
In-Reply-To: <mailman.787.1190248902.2658.python-list@python.org>
References: <mailman.787.1190248902.2658.python-list@python.org>
Message-ID: <5legsqF7k809U1@mid.uni-berlin.de>

Ahmad ? Baitalmal schrieb:
> Hi,
> I'm having a hard time getting python-mcrypt extension to build.
> I installed libmcrypt with --prefix=/usr and I checked that the library 
> exists
> 
> -rwxr-xr-x   1 root  wheel    352K Sep 19 16:53 
> /usr/lib/libmcrypt.4.4.8.dylib*
> lrwxr-xr-x   1 root  wheel     21B Sep 19 16:53 
> /usr/lib/libmcrypt.4.dylib@ -> libmcrypt.4.4.8.dylib
> lrwxr-xr-x   1 root  wheel     21B Sep 19 16:53 
> /usr/lib/libmcrypt.dylib@ -> libmcrypt.4.4.8.dylib
> -rwxr-xr-x   1 root  wheel    801B Sep 19 16:53 /usr/lib/libmcrypt.la*
> 
> But this is the output from setting up python-mcrypt
> 
> # python setup.py build
> running build
> running build_ext
> building 'mcrypt' extension
> creating build
> creating build/temp.macosx-10.3-fat-2.5
> gcc -arch ppc -arch i386 -isysroot /Developer/SDKs/MacOSX10.4u.sdk 
> -fno-strict-aliasing -Wno-long-double -no-cpp-precomp -mno-fused-madd 
> -fno-common -dynamic -DNDEBUG -g -O3 -DVERSION="1.1" -I/usr/include 
> -I/Library/Frameworks/Python.framework/Versions/2.5/include/python2.5 -c 
> mcrypt.c -o build/temp.macosx-10.3-fat-2.5/mcrypt.o
> creating build/lib.macosx-10.3-fat-2.5
> gcc -arch i386 -arch ppc -isysroot /Developer/SDKs/MacOSX10.4u.sdk -g 
> -bundle -undefined dynamic_lookup 
> build/temp.macosx-10.3-fat-2.5/mcrypt.o -lmcrypt -o 
> build/lib.macosx-10.3-fat-2.5/mcrypt.so
> /usr/bin/ld: for architecture ppc
> /usr/bin/ld: can't locate file for: -lmcrypt
> collect2: ld returned 1 exit status
> /usr/bin/ld: for architecture i386
> /usr/bin/ld: can't locate file for: -lmcrypt
> collect2: ld returned 1 exit status
> lipo: can't open input file: /var/tmp//ccGRKjU2.out (No such file or 
> directory)
> error: command 'gcc' failed with exit status 1
> 
> 
> What am I missing here? I linked PHP with the same libmcrypt library 
> just fine. This is only happening for this extension only.

Try setting the DYLD_LIBRARY_PATH might help. Or altering the setup.py 
to add -L/usr/lib.

Diez


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Sep 10 07:42:31 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 10 Sep 2007 13:42:31 +0200
Subject: python 2.5 problems
References: <3nVEi.98555$Vk6.66626@newsfe07.phx>
Message-ID: <5kkot7F46jjuU1@mid.individual.net>

Brian wrote:

> Finally deleted 2.2 and loaded 2.5 (see below), using
> the msi, on my XP partition. Having intermittent system
> crashes. 

The probability that this is not a coincidence is IMHO very, very
low. Looks like a deeper software or even hardware problem.

Regards,


Bj?rn

-- 
BOFH excuse #353:

Second-system effect.



From lists at zopyx.com  Fri Sep 28 11:41:55 2007
From: lists at zopyx.com (Andreas Jung)
Date: Fri, 28 Sep 2007 17:41:55 +0200
Subject: [Zope] how do I test for the current item in an iteration
In-Reply-To: <005b01c801e5$600ad3c0$0200a8c0@design4>
References: <005b01c801e5$600ad3c0$0200a8c0@design4>
Message-ID: <EDB2285E43DA6FD25C828DAB@suxmac2.local>



--On 28. September 2007 16:36:43 +0100 kamal hamzat 
<hamzat at dnetsystems.net> wrote:

> Dear All,
>
> I have this error after i added the if statement
>
> Error Type: TypeError
> Error Value: mybrains.__cmp__(x,y) requires y to be a 'mybrains', not a
> 'int'
>
>
> for i in context.zCatNewsCurrent():
>      if i <= 5:
>         print "%s: %s: %s" % (i.id, i.author, i.summary)
>
>         return printed

Look at Python's enumerate() method.

-aj
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From exhuma at gmail.com  Wed Sep 19 10:08:31 2007
From: exhuma at gmail.com (exhuma.twn)
Date: Wed, 19 Sep 2007 07:08:31 -0700
Subject: Keeping a database connection with a Singleton?
In-Reply-To: <fcra86$c8g$02$2@news.t-online.com>
References: <1190208406.041953.115580@g4g2000hsf.googlegroups.com>
	<fcr969$c8g$02$1@news.t-online.com>
	<1190209817.842068.280270@w3g2000hsg.googlegroups.com>
	<fcra86$c8g$02$2@news.t-online.com>
Message-ID: <1190210911.324836.14940@19g2000hsx.googlegroups.com>

On Sep 19, 4:03 pm, Peter Otten <__pete... at web.de> wrote:
> exhuma.twn wrote:
> > On Sep 19, 3:45 pm, Peter Otten <__pete... at web.de> wrote:
> >> exhuma.twn wrote:
> > [...]
>
> >> By the way, there is a pythonic (near) singleton: the module. So if you go
> >> with option 2, just move the connection setup into a separate module that
> >> you can import into client code.
>
> >> Peter
>
> > You say "(near)" singleton. What's the difference then?
>
> I was thinking of the main script of an application. If you import
> that by its name
>
> import main # assuming the file is main.py
>
> you end up with two instances sys.modules["main"] and sys.modules["__main__"].
>
> Peter

I see. Thanks. I will give it a go.



From jcd at sdf.lonestar.org  Tue Sep 11 14:02:02 2007
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Tue, 11 Sep 2007 14:02:02 -0400
Subject: Car-ac-systems
In-Reply-To: <5ko2rjF4om2bU1@mid.uni-berlin.de>
References: <cd6dnW0Vf8-wOnvbRVnyhwA@eclipse.net.uk>
	<b0ac48a01b8bb8c9c2b92ff03bf0@msnews.microsoft.com>
	<1189532573.728913.306470@g4g2000hsf.googlegroups.com>
	<5ko2rjF4om2bU1@mid.uni-berlin.de>
Message-ID: <20070911180202.GA28970@sdf.lonestar.org>

On Tue, Sep 11, 2007 at 05:50:43PM +0000, Marc 'BlackJack' Rintsch wrote regarding Re: Car-ac-systems:
> 
> On Tue, 11 Sep 2007 17:42:53 +0000, Zentrader wrote:
> 
> > <snip>
> > What is it about "please do not top-post" that you have difficulty
> > understanding? Or do "MVP"s feel that their time is so much more
> > valuable than anyone else's that they are free to ignore the norms?
> > 
> > Who made this the norm?
> 
> Common sense and (western) reading habits.
> 

More to the point, one or more of the mailing lists to which you are posting.  When in Rome, do as the Romans do.  If you don't know what the Romans do, you're probably cross-posting too broadly.

Cheers,
Cliff



From Sean.Sugrue at analog.com  Fri Sep 28 16:46:24 2007
From: Sean.Sugrue at analog.com (Sugrue, Sean)
Date: Fri, 28 Sep 2007 16:46:24 -0400
Subject: OCBC connection
In-Reply-To: <fdjmng$m58$2@sea.gmane.org>
Message-ID: <8FDC0F9BE1F91D44BE964AA54AAA67B629B62A1F@wilmexm3.ad.analog.com>

I want to connect on the windows side to a solaris server which has a
postgres database installed.
I can connect to the postgres database using the postgres odbc
connection but I'm using excel. 
I'd rather use python because it ports easily over to solaris. I will
install psycopg2 and try the code 
that was sent.

Thanks
Sean  

-----Original Message-----
From: python-list-bounces+sean.sugrue=analog.com at python.org
[mailto:python-list-bounces+sean.sugrue=analog.com at python.org] On Behalf
Of Steve Holden
Sent: Friday, September 28, 2007 4:04 PM
To: python-list at python.org
Subject: Re: OCBC connection

kyosohma at gmail.com wrote:
[...]
>>
>>  >>> curs = conn.cursor()
>>  >>> import psycopg2 as db
>>  >>> conn = db.connect(database="pycon", user="username",
>>          password="password", host="localhost", port=5432)  >>> curs 
>> = conn.cursor()  >>> curs.execute("SELECT orgid, orgname FROM 
>> organization")  >>> from pprint import pprint # just for neatness  
>> >>> pprint(curs.fetchall()) [(1, 'AB Strakt'),
>>   (79, 'DevIS'),
>>      ...
>>   (113, 'Test Organization'),
>>   (19, 'Holden Web LLC')]
>>  >>>

> Whoops! I almost posted some code using the adodb or the odbc module, 
> which is what I would have probably used, but I figured I'd take a 
> look and see if there was a postgres module available. I'm not seeing 
> any basic differences between your code and the code I linked to 
> though...except that if I ran your first line of code, I would get an 
> exception as "conn" hasn't been defined yet.
> 
> Whatever. I apologize for being misleading(?)
> 
I screwed up anyway - the first line shouldn't have been included.

But perhaps Sean could enlighten us as to whether ODBC is really a
requirement, or simply the first solution that he thought of. I don't
know why one would *require* ODBC.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline

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


From zzbbaadd at aol.com  Thu Sep 20 00:14:32 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Wed, 19 Sep 2007 21:14:32 -0700
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
In-Reply-To: <13f3roj6gdfq6b7@corp.supernews.com>
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<dea92f560709021735l2c72d53ew94410fcb33b9b50b@mail.gmail.com>
	<mailman.303.1188779927.28954.python-list@python.org>
	<1190164166.378500.155990@o80g2000hse.googlegroups.com>
	<1190241711.344058.238380@57g2000hsv.googlegroups.com>
	<1190242799.954176.279440@22g2000hsm.googlegroups.com>
	<7xps0ew0a8.fsf@ruckus.brouhaha.com>
	<13f3roj6gdfq6b7@corp.supernews.com>
Message-ID: <1190261672.753941.26320@o80g2000hse.googlegroups.com>

On Sep 19, 8:54 pm, Steven D'Aprano <st... at REMOVE-THIS-
cybersource.com.au> wrote:
> On Wed, 19 Sep 2007 19:14:39 -0700, Paul Rubin wrote:


>
> > etc. is at best an excuse for laziness.
>
> What are you doing about solving the problem? Apart from standing on the
> side-lines calling out "Get yer lazy behinds movin', yer lazy bums!!!" at
> the people who aren't even convinced there is a problem that needs
> solving?

He's trying to convince the developers that there is a problem. That
is not the same as your strawman argument.

>
> > And more and more often, in the
> > application areas where Python is deployed, it's just plain wrong.  Take
> > web servers: a big site like Google has something like a half million of
> > them.  Even the comparatively wimpy site where I work has a couple
> > thousand.  If each server uses 150 watts of power (plus air
> > conditioning), then if making the software 2x faster lets us shut down
> > 1000 of them,
>
> What on earth makes you think that would be anything more than a
> temporary, VERY temporary, shutdown? My prediction is that the last of
> the machines wouldn't have even been unplugged before management decided
> that running twice as fast, or servicing twice as many people at the same
> speed, is more important than saving on the electricity bill, and they'd
> be plugged back in.
>
Plugging back in 1000 servers would be preferable to buying and
plugging in 2000 new servers which is what would occur if the software
in this example had not been sped up 2x and management had still
desired a 2x speed up in system performance as you suggest.



From koara at atlas.cz  Sat Sep 22 17:53:04 2007
From: koara at atlas.cz (koara)
Date: Sat, 22 Sep 2007 14:53:04 -0700
Subject: unicode categories -- regex
In-Reply-To: <46F550F6.3030805@v.loewis.de>
References: <1190476650.222233.187800@57g2000hsv.googlegroups.com>
	<46F550F6.3030805@v.loewis.de>
Message-ID: <1190497984.345297.82070@o80g2000hse.googlegroups.com>

> At the moment, you have to generate a character class for this yourself,
> e.g.
> ...


Thank you Martin, this is exactly what i wanted to know.



From mail at timgolden.me.uk  Thu Sep  6 04:02:58 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 06 Sep 2007 09:02:58 +0100
Subject: StringIO MySQL data blob Image problem
In-Reply-To: <e75321bd0709051426o6a0499efn2ba4d58908101bca@mail.gmail.com>
References: <e75321bd0709050553h5e3302f7lf59f10104895ff5d@mail.gmail.com>	<46DEAAAB.8040008@timgolden.me.uk>	<e75321bd0709051213h686122d0w63318b1f16d2b509@mail.gmail.com>	<e75321bd0709051214t23ab465do47bb75d2f9dae024@mail.gmail.com>
	<e75321bd0709051426o6a0499efn2ba4d58908101bca@mail.gmail.com>
Message-ID: <46DFB432.20706@timgolden.me.uk>

dimitri pater wrote:
> Hi,
> the following code works when inserting images in reportlab tables:
> 
> (result4 is a query result)
> a=0
> for i in result4:
>            cfoto = StringIO()
>            cfoto.write(result4[a][9].tostring())
>            dfoto = cfoto.getvalue()
>            fileFoto = open(str(a)+'temp.jpg','wb')
>            fileFoto.write(dfoto)
>            fileFoto.close()
>            foto = Image(str(a)+'temp.jpg')
>            a+=1
> 
>           Do stuff here (insert the Image)
> 
> The problem with this code is that I need to create a unique file
> (str(a)+'temp.jpg'), I tried to use a single temp.jpg but it kept
> using the data from the first record. Tried flush(), truncate(0), but
> it didn't work. (My mistake probably ;-)
> But the images show in the PDF so that's fine for now.

You've obviously already worked this one out, which is
great. But if I might just comment on the code a little
bit, in a spirit of helpful criticism:

* It's not clear (to me) why you're using a StringIO
at all. I'm not familiar with MySQL in particular, but
in general, database interface modules will return a Python
string or possibly a buffer object from a Blob field.
In other words, is there anything to stop you simply
writing "result4[a][9]" directly into a file?

<code>
# ... stuff leading up to:
blob = result4[a][9]
ofile = open ("temp.jpg", "wb")
ofile.write (blob) # (or, possibly, str (blob) if it's a buffer)
ofile.close ()
</code>

* Assuming you're using any recent version of Python,
you can save the extra counter by iterating over
enumerate (result4) which return a 0-based index
and the indexed item as a tuple. In fact, now I look
at it, you're doing the work twice. You're iterating
over result4 but doing nothing with the "i" which
is the result of the iteration. You might do better
with something like this:

<code>
#
# I've used "a", "i" to match your code,
# but more descriptive names are good, such
# as n_result, result or whatever fits your mind.
#
for a, i in enumerate (result4):
   blob = i[9]
   ofile = open ("%d-temp.jpg" % a, "wb")
   ofile.write (blob)
   ofile.close ()

</code>

* Finally, the tempfile module is a good one to use for
temporary files. (Although the xx-temp.jpg solution you
used may be perfectly acceptable for your needs).

In the above, I've avoided quite a few good-practice
issues, such as try-except blocks when writing a file,
or with-blocks in Python 2.5+. The code I've sketched
out is merely a rough-and-ready illustration of a
particular point, not a manual of best practice.

I suspect you may be newish to Python, if not to programming
in general. My comments above aren't intended to be
nitpicks to show up your ignorance, but hopefully hints
which might help you look at alternatives or consider
alternative idioms within Python itself.

Good luck with the PDFs!

TJG


From andre.ditador9999 at gmail.com  Mon Sep 17 13:57:30 2007
From: andre.ditador9999 at gmail.com (Andre P.S Duarte)
Date: Mon, 17 Sep 2007 17:57:30 -0000
Subject: =?iso-8859-1?q?I=B4m_trying_to_desenvolve_a_site_in_python?=
Message-ID: <1190051850.198096.258890@o80g2000hse.googlegroups.com>

I?m trying to desenvolve a site in python. Any recommendation on
literature or sites I shoul see. Being that I?m a low experienced
programmer, if even I could be cald one lol, but any information would
really help!



From I_Dickinson at bitwisert.com  Fri Sep 28 04:23:37 2007
From: I_Dickinson at bitwisert.com (Ian Dickinson)
Date: Fri, 28 Sep 2007 09:23:37 +0100
Subject: Python 3.0 migration plans?
Message-ID: <46FCC819020000C8000023A2@bwrt2.bitwisert.com>

Never would look like a good time scale to me given that a lot of the stuff I use is being ripped out!!!!






From paddy3118 at googlemail.com  Wed Sep 19 03:00:00 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Wed, 19 Sep 2007 07:00:00 -0000
Subject: Sets in Python
In-Reply-To: <1190163542.585160.16230@w3g2000hsg.googlegroups.com>
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
	<1190163542.585160.16230@w3g2000hsg.googlegroups.com>
Message-ID: <1190185200.598314.216210@y42g2000hsy.googlegroups.com>

On Sep 19, 1:59 am, Raymond Hettinger <pyt... at rcn.com> wrote:
> On Sep 18, 5:39 pm, sapsi <saptarshi.g... at gmail.com> wrote:
>
> > I recently tried using the set function in Python and was surprised to
> > find that
>
> > a=[ 1, 2,3, [1,2] ]
>
> > doesn't work with 'set', throwing TyperError (unhashable exception). I
> > found out that this is because lists can't be hashed.
> > So,this implies 'a' cannot be a set in python which i think is quite
> > unfortunate, after all 'a' does look like a mathematical set.
>
> This is written as:
>
> a = set([1, 2, 3, frozenset([1, 2])])
>
> > This is not related, but is there i neat way (without pop and list
> > comprehension) to convert a set into a list?
>
> list(a)
>
> Raymond

frozenset over turning the embedded list into a tuple?
The tuple would preserve order in the item (1,2)
 a = set([1,2,3, (1,2)])

- Paddy.



From duncan.booth at invalid.invalid  Sat Sep 29 13:13:46 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 29 Sep 2007 17:13:46 GMT
Subject: sorteddict [was a PEP proposal, but isn't anymore!]
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190829592.800804.242260@50g2000hsm.googlegroups.com>
	<1190881576.186259.313720@57g2000hsv.googlegroups.com>
	<1190897445.179828.291720@y42g2000hsy.googlegroups.com>
	<slrnffslvp.40p.apardon@rcpc42.vub.ac.be>
	<Xns99BA9C6861A3Eduncanbooth@127.0.0.1>
	<1191078696.664214.152350@50g2000hsm.googlegroups.com>
Message-ID: <Xns99BAAF2FE1D9Eduncanbooth@127.0.0.1>

thebjorn <BjornSteinarFjeldPettersen at gmail.com> wrote:

> On Sep 29, 4:23 pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> [...]
>> Another example would be if you had a library which serialised a
>> dictionary to xml. There is nothing wrong with the library if it
>> doesn't care about order, but if you have some other reason why you
>> want the xml to be stable (e.g. because you store it in a version
>> control system and want to compare revisions) then a sorteddict would
>> allow you to impose that behaviour on the library from outside.
>>
>> Contrary to my earlier insistence that sorteddict is only really
>> useful if you can have a key parameter, both of these examples simply
>> want an arbitrary but defined order of iteration for dictionary keys.
>> A much simpler sorteddict that has been discussed earlier would be
>> sufficient. 
> 
> In fact, a dictionary that maintains insertion order would work in
> this case too.
> 
It would be better than the current situation, but say I have elements 'a', 
'b', and 'c'. Next run of the program I delete 'b', then the run after that 
I add 'b' back into the list so now I might get 'a', 'c', 'b'. Sorting 
would ensure that I can tell that I actually reverted a change.

Right now I think there are probably three dict variants needed: sorteddict 
(still waiting for a convincing use case), ordereddict (lots of use cases), 
and this one: stabledict.


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sat Sep 22 05:24:54 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sat, 22 Sep 2007 11:24:54 +0200
Subject: Getting rid of bitwise operators in Python 3?
References: <46f49740$0$32514$4c368faf@roadrunner.com>
	<13f99fediasg3ae@corp.supernews.com>
	<46f4c171$0$26367$4c368faf@roadrunner.com>
Message-ID: <5lk5b6F8iosiU2@mid.individual.net>

Carl Banks wrote:
> On Sat, 22 Sep 2007 05:19:42 +0000, Grant Edwards wrote:

>> I do.
> 
> Your anecdotal evidence is noted and given all the consideration
> it's due.

Being funny, or being arrogant? Many today's network protocols work
with bit flags. It is /not/ anecdotal.
 
>> I do it all the time.
> 
> Anecdotes again.  Do you have any stats on the usage of hardware
> interfacing in Python?  That would be a lot more useful.

You want to take features out just because they are not widely used?
Let's get rid of metaclasses and operator overloading too then.
Let's create special object types for implementing this and pack
them into seperate modules.
 
>> If you don't want to use the bitwise operations, then ignore
>> them.
>> Presto!  Simpler syntax.
> 
> Until people no longer need to read code written by others, this
> argument is utter bull.

What is your goal already? Holy war against usage of bitwise
operators? I can't think of any other reason.
 
> It's completely besides the point, anyways.  The point is to make
> the language core smaller.  It would shift code implementing
> bitwise logic out the core parts of Python, and localize it in
> modulespace.  

And seriously, what is the point of this? Why do you want to enforce
banning bitwise operations?

Regards,


Bj?rn

-- 
BOFH excuse #193:

Did you pay the new Support Fee?



From duncan.booth at invalid.invalid  Tue Sep  4 11:16:54 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 4 Sep 2007 15:16:54 GMT
Subject: Printing lists in columns (was: TypeError: 'module object is not
	callable')
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<mailman.315.1188810174.28954.python-list@python.org>
	<46dbd11e$0$6228$426a74cc@news.free.fr>
	<mailman.317.1188812089.28954.python-list@python.org>
	<1188816626.021956.281040@22g2000hsm.googlegroups.com>
	<5k2cjmF1r2aiU1@mid.uni-berlin.de>
	<1188836008.656284.76160@o80g2000hse.googlegroups.com>
	<46dc6f49$0$6207$426a34cc@news.free.fr>
	<1188900397.459760.259580@k79g2000hse.googlegroups.com>
	<slrnfdqe3t.i4p.hat@se-162.se.wtb.tue.nl>
	<Xns99A17FAC2587duncanbooth@127.0.0.1>
	<1188906767.737741.267350@19g2000hsx.googlegroups.com>
	<Xns99A18F8C528BCduncanbooth@127.0.0.1>
	<1188913394.763871.218660@d55g2000hsg.googlegroups.com>
Message-ID: <Xns99A1A5A65B0CBduncanbooth@127.0.0.1>

cjt22 at bath.ac.uk wrote:

> I know this makes me sound very stupid but how would I specify
> in the parameter the inner lists without having to write them all out
> such as:
> 
> for row in izip_longest(d[0], d[1], d[2], fillvalue='*'):
>     print ', '.join(row)
> 
> i.e. How could I do the following if I didn't know how many list of
> lists I had.
> Sorry this sounds stupid and easy.
> Thankyou very much in advance as well, you are all very helpful
> indeed.

The variable arguments have to appear last in the call (in the order *x, 
**y if you have both):

>>> a = ["1" , "2"];  b = ["4", "5", "6"];  c = ["7", "8", "9"]
>>> d = [a, b, c]
>>> for row in izip_longest(fillvalue='*', *d):
	print ', '.join(row)

	
1, 4, 7
2, 5, 8
*, 6, 9
>>> 


From stefan.behnel-n05pAM at web.de  Fri Sep 21 01:27:50 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Fri, 21 Sep 2007 07:27:50 +0200
Subject: validating parser
In-Reply-To: <mailman.832.1190324098.2658.python-list@python.org>
References: <fcuhc8$at5$1@fred.mathworks.com>
	<mailman.832.1190324098.2658.python-list@python.org>
Message-ID: <46F35656.9000705@web.de>

David wrote:
> On 9/20/07, Robert Schweikert <robert.schweikert at mathworks.com> wrote:
>> Is there a Python module which will do XSD validation?
> 
> http://mail.python.org/pipermail/xml-sig/2006-June/011527.html

... of which lxml (i.e. libxml2) is definitely the most standards compliant
(and feature rich anyway).

Stefan


From mclausch at gmail.com  Thu Sep 13 17:47:26 2007
From: mclausch at gmail.com (Matthew Lausch)
Date: Thu, 13 Sep 2007 14:47:26 -0700
Subject: Subprocess module and unicode input
In-Reply-To: <mailman.265.1189219380.2658.python-list@python.org>
References: <1189201586.423477.28200@g4g2000hsf.googlegroups.com>
	<mailman.265.1189219380.2658.python-list@python.org>
Message-ID: <1189720046.872190.177000@o80g2000hse.googlegroups.com>

Thanks! That worked perfectly.
Matt

On Sep 7, 10:42 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Fri, 07 Sep 2007 18:46:26 -0300, Matthew Lausch <mclau... at gmail.com>
> escribi?:
>
> > I'd like to use thesubprocessmodule with upper level characters in
> > the process name or in the arguments to the process. Something like
> > this:
>
> > cmd = [ u'test_\u65e5\u672c\u8a9e_exec.bat', u'arg1', u'arg2' ]
> >subprocess.call(cmd)
>
> > But this gives the error:
>
> > UnicodeEncodeError: 'ascii' codec can't encode characters in position
> > 5-7: ordinal not in range(128)
>
> > Is there a way around this problem? I don't want to assume any
> > particular set of characters. The example above uses Japanese
> > characters, but I would like to support anything.
>
> You have to encode those unicode objects anyway - but you don't have to
> assume any encoding.
> Your .bat file will be executed by CMD.EXE, and the shell expects a string
> - doesn't understand unicode objects. Like when you type that same
> commands on the console.
> Use sys.getfilesystemencoding() to obtain the required encoding (likely
> "mbcs"):
>
> fse = sys.getfilesystemencoding()
> cmd = [arg.encode(fse) if isinstance(arg,unicode) else arg
>         for arg in cmd]
>
> --
> Gabriel Genellina




From zzbbaadd at aol.com  Wed Sep 12 22:40:04 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Wed, 12 Sep 2007 19:40:04 -0700
Subject: Python 3K or Python 2.9?
In-Reply-To: <87ir6f5mrq.fsf@benfinney.id.au>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<87sl5j5r34.fsf@benfinney.id.au>
	<1189646281.569796.267940@d55g2000hsg.googlegroups.com>
	<87ir6f5mrq.fsf@benfinney.id.au>
Message-ID: <1189651204.408268.57580@19g2000hsx.googlegroups.com>


>     >>> Foo.bar(foo, "spam")
>     >>> foo.bar("spam")

That looks like a case of "There's more than one way to do it". ;)
The first form is definitely consistent with the
method declaration, so there's a lot to be said for using that style
when teaching people to make classes -> send self, receive self.


> The latter two statements are equivalent. The 'instance.method(args)'
> syntax is just sugar for 'Class.method(instance, args)'.

I think I saw where Guido Van Rossum had referred to something as
"syntactic sugar" in some python.org page. I am not familiar with
sugar as related to syntax. Is it being used as a synonym for "easier
way of doing it"?



From aine_canby at yahoo.com  Thu Sep 27 09:44:51 2007
From: aine_canby at yahoo.com (aine_canby at yahoo.com)
Date: Thu, 27 Sep 2007 06:44:51 -0700
Subject: Confusion regarding constructor as default value
In-Reply-To: <5m1pqjFb5l19U1@mid.uni-berlin.de>
References: <1190898221.833936.40480@57g2000hsv.googlegroups.com>
	<5m1pqjFb5l19U1@mid.uni-berlin.de>
Message-ID: <1190900691.009109.259450@57g2000hsv.googlegroups.com>

On 27 Sep, 15:34, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>  aine_ca... at yahoo.com wrote:
> > Why are the following different?
>
> > def AddRow(self, rowName, tableRow=TableRow(ReleaseDate(""),
> > ExpiryDate(""))):
> > # check to see if the row already exists, if not add it to the
> > container
>
> > if not self.dict.has_key(rowName):
> > self.dict[rowName] = tableRow
>
> > def AddRow(self, rowName, tableRow):
> > # check to see if the row already exists, if not add it to the
> > container
>
> > if not self.dict.has_key(rowName):
> > self.dict[rowName] = TableRow(ReleaseDate(""), ExpiryDate(""))
>
> > It seems that when I use the first function that I'm getting duplicate
> > objects in self.dict
>
> > Thanks for your help,
>
> It's a FAQ.
>
> http://effbot.org/pyfaq/why-are-default-values-shared-between-objects...
>
> Diez- D?lj citerad text -
>
> - Visa citerad text -

Cool, I understand now. It was my understanding of how Python works
that was at fault.



From lobais at gmail.com  Sun Sep 23 13:44:53 2007
From: lobais at gmail.com (Thomas Dybdahl Ahle)
Date: Sun, 23 Sep 2007 19:44:53 +0200
Subject: Untrusted python code
Message-ID: <pan.2007.09.23.17.44.53@gmail.com>

Hi, I have an application for which I want users to be able to make 
themes.
I've planed a rather advanced model (in xml), which gives themes the 
option to redefine various drawing methods.
Now I don't want those themes to be able to take over the current user, 
but I'd still like the scripts to be able to import stuff like math.
Is there a way to ensure no IO and other dangerous stuff is done?


From cjt22 at bath.ac.uk  Mon Sep 10 10:57:58 2007
From: cjt22 at bath.ac.uk (cjt22 at bath.ac.uk)
Date: Mon, 10 Sep 2007 07:57:58 -0700
Subject: Using a time duration to print out data where every 2 seconds is
	a pixel
In-Reply-To: <mailman.319.1189432713.2658.python-list@python.org>
References: <1189427545.322679.260970@r29g2000hsg.googlegroups.com>
	<slrnfeaips.m47.hat@se-162.se.wtb.tue.nl>
	<mailman.319.1189432713.2658.python-list@python.org>
Message-ID: <1189436278.456311.128260@22g2000hsm.googlegroups.com>

Thanks however I am still having a problem using the time module for
arithmetic

My string times are of values such as 09:55:17

and I have code such as:

>from time import *
>startPoint = strptime(step.sTime, "%H:%S:%M")
>finishPoint = strptime(step.fTime, "%H:%S:%M")

>duration = mktime(startPoint) - mktime(finishPoint)

but it generates the error

>OverflowError: mktime argument out of range

Cheers



From dariusjack2006 at yahoo.ie  Fri Sep 21 20:09:04 2007
From: dariusjack2006 at yahoo.ie (http://members.lycos.co.uk/dariusjack/)
Date: Fri, 21 Sep 2007 17:09:04 -0700
Subject: Who can develop the following Python script into working
	application ?
In-Reply-To: <5lho31F84jgjU1@mid.uni-berlin.de>
References: <1190334828.210230.293980@50g2000hsm.googlegroups.com>
	<1190372423.768184.60080@19g2000hsx.googlegroups.com>
	<5lho31F84jgjU1@mid.uni-berlin.de>
Message-ID: <1190419744.390216.19040@w3g2000hsg.googlegroups.com>

On Sep 21, 1:26 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> <snip/>
>
> > Please help and let me know your terms.
>
> There are websites dedicated to this - like e.g.
>
> http://www.guru.com/
>
> Make an offer there.
>
> Diez

Ok Diez,

Do you really think only Gurus from Guru.com can help me ?
Do really need a middle-man ?
As you see, I am not developer of that code.
Henri responded to me, code was intended for developers.
It doesn't really look complicated or high-tech.
Script should connect to a remote web site and get xml formatted data
as a response to a query string http request, read data and inject
into SQL database.
Is Python not fit to a task of this kind ?
Is there no a library of Python free scripts to accomplish the above
like many for javascripts ?
I am asking just of curosity, as an author of this script didn't
respond to my second request  to tell me how complicated is the
problem and what made him not to write that script as a fully working
version.

Is Python so difficult, complicated, even for experienced developers ?

Thanks for any comments.

Darius




From danb_83 at yahoo.com  Fri Sep 14 19:16:36 2007
From: danb_83 at yahoo.com (Dan Bishop)
Date: Fri, 14 Sep 2007 16:16:36 -0700
Subject: subclass of integers
In-Reply-To: <1189780201.692192.291010@k79g2000hse.googlegroups.com>
References: <1189780201.692192.291010@k79g2000hse.googlegroups.com>
Message-ID: <1189811796.011837.75780@r29g2000hsg.googlegroups.com>

On Sep 14, 9:30 am, Mark Morss <mfmo... at aep.com> wrote:
> I would like to construct a class that includes both the integers and
> None.  I desire that if x and y are elements of this class, and both
> are integers, then arithmetic operations between them, such as x+y,
> return the same result as integer addition.  However if either x or y
> is None, these operations return None.

Rather than subclassing int, why not just make a singleton NaN object
with overloaded arithmetic operators that all return NaN?



From khemkaamit at gmail.com  Mon Sep  3 05:02:35 2007
From: khemkaamit at gmail.com (Amit Khemka)
Date: Mon, 3 Sep 2007 14:32:35 +0530
Subject: TypeError: 'module object is not callable'
In-Reply-To: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
Message-ID: <1360b7230709030202o5f0ff4cm6a95f99b9867d80a@mail.gmail.com>

On 9/3/07, christophertidy at hotmail.com <christophertidy at hotmail.com> wrote:
> Hi
>
> I am new to Python and have recieved this error message when trying to
> instantiate an object from a class from another file within the same
> directory and wondered what I have done wrong.
>
> I have a Step.py class:
> class Step(object)
>         def __init__(self, sName):

>         "Initialise a new Step instance"
>         self.sName = sName
>         self.depSteps = []
>         self.remDepSteps = []
>         self.isCompleted = 0
>
>
> Then I have created a new file within the same directory called
> main.py:
>
> import Step
> a  = Step("magn")
>
> The following however generates the error
> Traceback (most recent call last):
>   File "main.py", line 3, in ?
>     a  = Step("magn")
> TypeError: 'module' object is not callable
>
> If anyone could help point me in the right direction, how to fix this
> problem it would be much appreciated.
> Chris

The exception is being raised as you are being confused about the
names ie: you have a class named "Step" in a module named "Step.py" .
And by importing the module the only "Step"  python sees is the module
not the names declared within the module.

To access a name defined in the module you can do :

example1:
import Step
a = Step.Step("magn") # It refers the name "Step" defined IN the module "Step"

example 2:
from Step import Step # You directly import the class ( and make the
name visible in your name space)
a = Step("magn")


Also have a look at:
http://effbot.org/zone/import-confusion.htm
http://docs.python.org/ref/import.html


Cheers,

-- 
----
Amit Khemka
website: www.onyomo.com
wap-site: www.owap.in


From arnodel at googlemail.com  Sun Sep  2 08:20:42 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 02 Sep 2007 05:20:42 -0700
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
In-Reply-To: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
Message-ID: <1188735642.391419.103650@19g2000hsx.googlegroups.com>

On Sep 2, 12:51 pm, jwrweather... at gmail.com wrote:
> I'm pretty new to python, but am very happy with it. As well as using
> it at work I've been using it to solve various puzzles on the Project
> Euler site -http://projecteuler.net. So far it has not let me down,
> but it has proved surprisingly slow on one puzzle.
>
> The puzzle is: p is the perimeter of a right angle triangle with
> integral length sides, {a,b,c}. which value of p  < 1000, is the
> number of solutions {a,b,c} maximised?
>
> Here's my python code:
>
> #!/usr/local/bin/python
>
> solutions = [0] * 1001
> p = 0
>
> for a in xrange(1, 1000):
>     for b in xrange(1, 1000 - a):
>         for c in xrange(1, 1000 - a - b):
>             p = a + b + c
>             if p < 1000:
>                 if a ** 2 + b ** 2 == c ** 2:
>                     solutions[p] += 1
>
> max = 0
> maxIndex = 0
> index = 0
> for solution in solutions:
>     if solution > max:
>         max = solution
>         maxIndex = index
>     index += 1
>
> print maxIndex
>
> It takes 2 minutes and twelve seconds on a 2.4GHz Core2Duo MacBook
> Pro. Surprised at how slow it was I implemented the same algorithm in
> C:
>
> #include <stdio.h>
> #include <stdlib.h>
>
> int main() {
>   int* solutions = calloc(1000, sizeof(int));
>
>   int p;
>   for(int a = 1; a < 1000; ++a) {
>     for(int b = 1; b < 1000 - a; ++b) {
>       for(int c = 1; c < 1000 - a - b; ++c) {
>         p = a + b + c;
>         if(p < 1000) {
>           if(a * a + b * b == c * c) {
>             solutions[p] += 1;
>           }
>         }
>       }
>     }
>   }
>
>   int max = 0;
>   int maxIndex = 0;
>
>   for(int i = 0; i < 1000; ++i) {
>     if(solutions[i] > max) {
>       max = solutions[i];
>       maxIndex = i;
>     }
>   }
>   printf("%d\n", maxIndex);
>   return 0;
>
> }
>
> gcc -o 39 -std=c99 -O3 39.c
>
> The resulting executable takes 0.24 seconds to run. I'm not expecting
> a scripting language to run faster than native code, but I was
> surprised at how much slower it was in this case. Any ideas as to what
> is causing python so much trouble in the above code?

from math import sqrt

solutions = [0] * 1001
p = 0

for a in xrange(1, 1000):
    a2 = a*a
    for b in xrange(1, 1000 - a):
        c = sqrt(a2 + b*b)
        if c == int(c) and a+b+c < 1000:
            solutions[a+b+int(c)] += 1

max = 0
maxIndex = 0
index = 0
for solution in solutions:
    if solution > max:
        max = solution
        maxIndex = index
    index += 1

print maxIndex

--
Arnaud




From steve at holdenweb.com  Fri Sep 21 10:47:02 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 21 Sep 2007 10:47:02 -0400
Subject: Calling constructor but not initializer
In-Reply-To: <13f7kmfhe19lb7b@corp.supernews.com>
References: <13f7kmfhe19lb7b@corp.supernews.com>
Message-ID: <fd0lh7$347$1@sea.gmane.org>

Steven D'Aprano wrote:
> I have a class that has a distinct "empty" state. In the empty state, it 
> shouldn't have any data attributes, but it should still have methods.
> 
> The analogy is with a list: an empty list still has methods like append() 
> etc. but it has no "data", if by data you mean items in the list.
> 
> I can construct an empty instance in the __new__ constructor, and I can 
> initialize an non-empty instance in the __init__ initializer, but I can't 
> think of any good way to stop __init__ from being called if the instance 
> is empty. In pseudo-code, I want to do something like this:
> 
> class Parrot(object):
>     def __new__(cls, data):
>         construct a new empty instance
>         if data is None:
>             return that empty instance
>         else:
>             call __init__ on the instance to populate it
>             return the non-empty instance
> 
> 
> but of course __init__ is automatically called.
> 
> 
> Any suggestions for doing something like this?
> 
> 
Easy: use a method whose name is something other than __init__, then 
don't bother to implement __init__. Note that __new__ shouldn't call 
__init__ anyway, that's done by the instance creation mechanism.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From kar1107 at gmail.com  Tue Sep 25 16:55:52 2007
From: kar1107 at gmail.com (Karthik Gurusamy)
Date: Tue, 25 Sep 2007 20:55:52 -0000
Subject: Confused about 'positive lookbehind assertion'
In-Reply-To: <mailman.1049.1190732512.2658.python-list@python.org>
References: <496954360709241938k6baf1009gc7cab215ad16b12f@mail.gmail.com>
	<mailman.1049.1190732512.2658.python-list@python.org>
Message-ID: <1190753752.126335.205410@o80g2000hse.googlegroups.com>

On Sep 25, 8:01 am, Erik Jones <e... at myemma.com> wrote:
> On Sep 24, 2007, at 9:38 PM, Robert Dailey wrote:
>
> > Hi,
>
> > I've been reading the python documentation on 'positive lookbehind
> > assertion' and I don't understand at all how it works. The python
> > docs give the following example:
>
> > " (?<=abc)def will find a match in "abcdef", since the lookbehind
> > will back up 3 characters and check if the contained pattern matches."
>
> > Can anyone emphasize more on what this RE operation does? Thanks.
>
> Have you actually tried it out?
>
>  >>> import re
>  >>> r = re.compile(r'(?<=abc)def')
>  >>> m1 = r.search('aaaabcdeffff')
>  >>> m1.group()'def'
> 'def'
>  >>> m2 = r.search('bcdefff')
>  >>> m2 == None
> True
>
> So, it matches 'def' but only if it is immediately preceded by 'abc'.

Any idea what this positive lookbehind achieves which can't be done
without it.
I remember cases where positive look-ahead is useful.

In the above example, r.search('abcdef') does the job of ensuring
'def' is preceded by 'abc'.

Karthik

>
> Erik Jones
>
> Software Developer | Emma?
> e... at myemma.com
> 800.595.4401 or 615.292.5888
> 615.292.0777 (fax)
>
> Emma helps organizations everywhere communicate & market in style.
> Visit us online athttp://www.myemma.com




From bjorn.kempen at gmail.com  Sat Sep 15 18:35:32 2007
From: bjorn.kempen at gmail.com (buffi)
Date: Sat, 15 Sep 2007 22:35:32 -0000
Subject: Needless copying in iterations?
In-Reply-To: <mailman.595.1189895158.2658.python-list@python.org>
References: <fchk59$mm3$1@daisy.noc.ucla.edu>
	<mailman.595.1189895158.2658.python-list@python.org>
Message-ID: <1189895732.702943.295980@d55g2000hsg.googlegroups.com>

On Sep 16, 12:25 am, "Calvin Spealman" <ironfro... at gmail.com> wrote:
> This is a case where its up to the type involved. For example,
> xrange() slices the way you want but range() does not.

Coul you explain this?
As far as I know you can't slice a xrange

- Bj?rn Kemp?n



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Sep  3 13:38:05 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 03 Sep 2007 19:38:05 +0200
Subject: 400 Bad Request calling urllib2.urlopen()
References: <1188824817.761125.190520@k79g2000hse.googlegroups.com>
Message-ID: <5k2v3nF1qr20U1@mid.individual.net>

Achim Domma wrote:

> urllib2.HTTPError: HTTP Error 400: Bad Request
> 
> I'm using Python 2.5.1 and Google did not help. Any hint on how to
> fix or debug this problem?

Use e. g. wireshark to look at the raw stream data and check if the
request is malformed.

Regards,


Bj?rn

-- 
BOFH excuse #123:

user to computer ratio too high.



From imageguy1206 at gmail.com  Fri Sep  7 07:39:43 2007
From: imageguy1206 at gmail.com (imageguy)
Date: Fri, 07 Sep 2007 04:39:43 -0700
Subject: py2exe - change name of exe created
In-Reply-To: <1189164934.705547.156670@r34g2000hsd.googlegroups.com>
References: <1189164934.705547.156670@r34g2000hsd.googlegroups.com>
Message-ID: <1189165183.727542.47640@19g2000hsx.googlegroups.com>

Sorry for the double post, sent it to quickly.

I have a setup script like this;

setup(windows = [{"script":"myprogram.py",
                   "icon_resources":[(0,"nabbitt.ico")],
                    "other_resources": [(24,1,manifest)]}
],
                name = "My Program ver 0.1",
                data_files = [("",rootdata)],
                zipfile = None,
                options = {"py2exe": {
                                       "compressed" : 1,
                                       "dll_excludes":
["w9xpopen.exe"],
                                        "bundle_files": 3
                                                }
                        },
                )


Note that every thing works fine with this and creates an exe program
called
"myprogram.exe"

I would like to setup program to create an output called;
"MyBestProgram.exe"

IS that at all possible ?

Geoff.



From zentraders at gmail.com  Sat Sep 22 15:10:52 2007
From: zentraders at gmail.com (Zentrader)
Date: Sat, 22 Sep 2007 12:10:52 -0700
Subject: find difference in days from YYYYMMDD to YYYYMMDD
In-Reply-To: <mailman.920.1190453625.2658.python-list@python.org>
References: <mailman.920.1190453625.2658.python-list@python.org>
Message-ID: <1190488252.350797.267160@g4g2000hsf.googlegroups.com>

On Sep 22, 2:37 am, Konstantinos Pachopoulos <kostaspa... at yahoo.gr>
wrote:
> Hi,
> does any body now any such algorith? to find difference in days from
> YYYYMMDD to YYYYMMDD?
> Or just an algorithm, that converts YYYYMMDD to seconds since the epoch?
>
> Thanks

For some reason, to-seconds-since-epoch is in the calendar class.
calendar.timegm() takes a tuple and returns the epoch seconds
import time
import calendar

today_secs = calendar.timegm( (2007, 9, 22, 0, 0, 0) )
print today_secs
one_day = 24*60*60
print time.gmtime( today_secs+one_day )



From ptmcg at austin.rr.com  Fri Sep 14 09:13:50 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Fri, 14 Sep 2007 06:13:50 -0700
Subject: extract text from log file using re
In-Reply-To: <mailman.498.1189710574.2658.python-list@python.org>
References: <mailman.498.1189710574.2658.python-list@python.org>
Message-ID: <1189775630.680665.39510@g4g2000hsf.googlegroups.com>

On Sep 13, 4:09 pm, Fabian Braennstroem <f.braennstr... at gmx.de> wrote:
> Hi,
>
> I would like to delete a region on a log file which has this
> kind of structure:
>

How about just searching for what you want.  Here are two approaches,
one using pyparsing, one using the batteries-included re module.

-- Paul


# -*- coding: iso-8859-15 -*-
data = """\
   498 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04 8.3956e-04
3.8560e-03 4.8384e-02 11:40:01  499
   499 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04 8.3956e-04
3.8560e-03 4.8384e-02 11:40:01  499
reversed flow in 1 faces on pressure-outlet 35.

Writing
"/home/gcae504/SCR1/Solververgleich/Klimakruemmer_AK/CAD/Daimler/
fluent-050?0.cas"...
 5429199 mixed cells, zone 29, binary.
11187656 mixed interior faces, zone 30, binary.
   20004 triangular wall faces, zone 31, binary.
    1104 mixed velocity-inlet faces, zone 32, binary.
  133638 triangular wall faces, zone 33, binary.
   14529 triangular wall faces, zone 34, binary.
    1350 mixed pressure-outlet faces, zone 35, binary.
   11714 mixed wall faces, zone 36, binary.
 1232141 nodes, binary.
 1232141 node flags, binary.
Done.

Writing
"/home/gcae504/SCR1/Solververgleich/Klimakruemmer_AK/CAD/Daimler/
fluent-050?0.dat"...
Done.


   500 1.0049e-03 2.4630e-04 9.8395e-05 1.4865e-04 8.3913e-04
3.8545e-03 1.3315e-01 11:14:10  500


 reversed flow in 2 faces on pressure-outlet 35.
   501 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04 8.3956e-04
3.8560e-03 4.8384e-02 11:40:01  499
"""

print "search using pyparsing"
from pyparsing import *

integer = Word(nums).setParseAction(lambda t:int(t[0]))
scireal = Regex(r"\d*\.\d*e\-\d\d").setParseAction(lambda
t:float(t[0]))
time = Regex(r"\d\d:\d\d:\d\d")

logline = (integer("testNum") +
           And([scireal]*7)("data") +
           time("testTime") +
           integer("result"))

for tRes in logline.searchString(data):
    print "Test#:",tRes.testNum
    print "Data:", tRes.data
    print "Time:", tRes.testTime
    print "Output:", tRes.result
    print

print
print "search using re's"
import re
integer = r"\d*"
scireal = r"\d*\.\d*e\-\d\d"
time = r"\d\d:\d\d:\d\d"
ws = r"\s*"

namedField = lambda reStr,n: "(?P<%s>%s)" % (n,reStr)
logline = re.compile(
            namedField(integer,"testNum") + ws +
            namedField( (scireal+ws)*7,"data" ) +
            namedField(time,"testTime") + ws +
            namedField(integer,"result") )
for m in logline.finditer(data):
    print "Test#:",int(m.group("testNum"))
    print "Data:", map(float,m.group("data").split())
    print "Time:", m.group("testTime")
    print "Output:", int(m.group("result"))
    print

Prints:

search using pyparsing
Test#: 498
Data: [0.0010085999999999999, 0.00024607999999999997,
9.8589000000000001e-005, 0.00014908, 0.00083956000000000005,
0.0038560000000000001, 0.048384000000000003]
Time: 11:40:01
Output: 499

Test#: 499
Data: [0.0010085999999999999, 0.00024607999999999997,
9.8589000000000001e-005, 0.00014908, 0.00083956000000000005,
0.0038560000000000001, 0.048384000000000003]
Time: 11:40:01
Output: 499

Test#: 500
Data: [0.0010049, 0.00024630000000000002, 9.8394999999999996e-005,
0.00014865000000000001, 0.00083913, 0.0038544999999999999,
0.13314999999999999]
Time: 11:14:10
Output: 500

Test#: 501
Data: [0.0010085999999999999, 0.00024607999999999997,
9.8589000000000001e-005, 0.00014908, 0.00083956000000000005,
0.0038560000000000001, 0.048384000000000003]
Time: 11:40:01
Output: 499


search using re's
Test#: 498
Data: [0.0010085999999999999, 0.00024607999999999997,
9.8589000000000001e-005, 0.00014908, 0.00083956000000000005,
0.0038560000000000001, 0.048384000000000003]
Time: 11:40:01
Output: 499

Test#: 499
Data: [0.0010085999999999999, 0.00024607999999999997,
9.8589000000000001e-005, 0.00014908, 0.00083956000000000005,
0.0038560000000000001, 0.048384000000000003]
Time: 11:40:01
Output: 499

Test#: 500
Data: [0.0010049, 0.00024630000000000002, 9.8394999999999996e-005,
0.00014865000000000001, 0.00083913, 0.0038544999999999999,
0.13314999999999999]
Time: 11:14:10
Output: 500

Test#: 501
Data: [0.0010085999999999999, 0.00024607999999999997,
9.8589000000000001e-005, 0.00014908, 0.00083956000000000005,
0.0038560000000000001, 0.048384000000000003]
Time: 11:40:01
Output: 499




From newsuser at stacom-software.de  Fri Sep  7 09:17:06 2007
From: newsuser at stacom-software.de (Alexander Eisenhuth)
Date: Fri, 07 Sep 2007 15:17:06 +0200
Subject: Class design (information hiding)
In-Reply-To: <46e1305e$0$18302$426a74cc@news.free.fr>
References: <fbr2gg$ipg$1@online.de> <46e1305e$0$18302$426a74cc@news.free.fr>
Message-ID: <fbrj0h$74r$1@online.de>

Bruno Desthuilliers schrieb:

> Nope. It's either 'interface' (no leading underscore),  'implementation' 
> (single leading underscore), 'implementation with some protection 
> against accidental overriding' (two leading underscores).

What do you mean with 'implementation'? What does it express?


From tdwdotnet at gmail.com  Thu Sep 20 19:04:42 2007
From: tdwdotnet at gmail.com (Tim Williams)
Date: Fri, 21 Sep 2007 00:04:42 +0100
Subject: I could use some help making this Python code run faster using
	only Python code.
In-Reply-To: <1190325588.608625.259800@q3g2000prf.googlegroups.com>
References: <1190325588.608625.259800@q3g2000prf.googlegroups.com>
Message-ID: <9afea2ac0709201604i3a4510e1o8edc8fa01bcd5432@mail.gmail.com>

On 20/09/2007, Python Maniac <raychorn at hotmail.com> wrote:
> I am new to Python however I would like some feedback from those who
> know more about Python than I do at this time.
>
> def scrambleLine(line):
>    s = ''
>    for c in line:
>        s += chr(ord(c) | 0x80)
>    return s
>
> def descrambleLine(line):
>    s = ''
>    for c in line:
>        s += chr(ord(c) & 0x7f)
>    return ''.join( [chr(ord(c) & 0x7f) for c in line] )
>
> def scrambleFile(fname,action=1):
>    if (path.exists(fname)):
>        try:
>            f = open(fname, "r")
>            toks = fname.split('.')
>            while (len(toks) > 2):
>                toks.pop()
>            fname = '.'.join(toks)
>            if (action == 1):
>                _fname = fname + '.scrambled'
>            elif (action == 0):
>                _fname = fname + '.descrambled'
>            if (path.exists(_fname)):
>                os.remove(_fname)
>            ff = open(_fname, "w+")
>            if (action == 1):
>                for l in f:
>                    ff.write(scrambleLine(l))
>            elif (action == 0):
>                for l in f:
>                    ff.write(descrambleLine(l))
>        except Exception, details:
>            print 'ERROR :: (%s)' % details
>        finally:
>            f.close()
>            ff.close()
>    else:
>        print 'WARNING :: Missing file "%s" - cannot continue.' % fname
>
> --


def scrambleLine(line):
   return ''.join( [chr(ord(c) | 0x80) for c in line] )

def descrambleLine(line):
    return ''.join( [chr(ord(c) & 0x7f) for c in line] )

def scrambleFile(fname,action=1):
       try:
           f = open(fname, "r")
           fname = '.'.join(fname.split('.')[:2])
           if action:
               _fname = fname + '.scrambled'
           else:
               _fname = fname + '.descrambled'
           ff = open(_fname, "w")
           if action:
               ff.write('\r\n.join([scrambleLine(l) for l in f ]))
           else :
               ff.write('\r\n.join([descrambleLine(l) for l in f ]))
           f.close()
           ff.close()
       except Exception, details:
           print 'ERROR :: (%s)' % details

HTH :)


From prudek at bvx.cz  Mon Sep 10 09:38:34 2007
From: prudek at bvx.cz (Milos Prudek)
Date: Mon, 10 Sep 2007 15:38:34 +0200
Subject: zlib
Message-ID: <200709101538.35071.prudek@bvx.cz>

Although I have Python 2.5 with zlib in my Linux disto, I need to install my 
own Python (as most Zope developers do). Zope requires zlib. Python 2.4.4 
does not contain zlib. 

What is the correct procedure for installing zlib from source into Python?

-- 
Milos Prudek


From nagle at animats.com  Tue Sep  4 00:26:01 2007
From: nagle at animats.com (John Nagle)
Date: Mon, 03 Sep 2007 21:26:01 -0700
Subject: FCGI app reloading on every request
Message-ID: <46DCDE59.8060109@animats.com>

    I'm converting a web app from CGI to FCGI.  The application works fine
under FCGI, but it's being reloaded for every request, which makes FCGI
kind of pointless.  I wrote a little FCGI app which prints when the program is 
loaded and when it gets a request.  And indeed, the program gets reloaded for
each HTTP request.  Something is probably misconfigured.  But what?

    I'm using Apache with "mod_fcgid", configured via Plesk.  Plesk
sets up "/etc/httpd/conf.d/fcgid.conf" with:

# added by psa-mod-fcgid-configurator
<IfModule mod_fcgid.c>
   IdleTimeout 3600
   ProcessLifeTime 7200
   MaxProcessCount 64
   DefaultMaxClassProcessCount 8
   IPCConnectTimeout 30
   IPCCommTimeout 45
   DefaultInitEnv RAILS_ENV production
</IfModule>

which seems reasonable enough, even though I'm not using
Rails or Ruby.

On the Python side, I'm using Python 2.5 on Linux, with Alan
Saddi's "fcgi.py" module.

Everything seems to work correctly, and there are no errors in the Apache
error log.  But performance is terrible because the Python code
is reloaded for each request.  I can only get about five transactions
a second through, on an dedicated server, with each transaction
doing a simple MySQL request.  All the time is going into program loading;
the database is mostly idle.

				John Nagle


From richyjsm at gmail.com  Mon Sep  3 08:07:21 2007
From: richyjsm at gmail.com (richyjsm at gmail.com)
Date: Mon, 03 Sep 2007 12:07:21 -0000
Subject: So what exactly is a complex number?
In-Reply-To: <mailman.310.1188805355.28954.python-list@python.org>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
	<mailman.212.1188576194.28954.python-list@python.org>
	<451mq4-les.ln1@ozzie.tundraware.com>
	<mailman.266.1188644067.28954.python-list@python.org>
	<lbjpq4-eo22.ln1@ozzie.tundraware.com>
	<mailman.310.1188805355.28954.python-list@python.org>
Message-ID: <1188821241.516029.229020@o80g2000hse.googlegroups.com>

On Sep 2, 6:13 am, Grzegorz S odkowicz <jerg... at wp.pl> wrote:

> In fact, a proper vector in physics has 4 features: point of
> application, magnitude, direction and sense.

so whats the "point of application" of the sum of two vectors?  Do
tell.




From mbrown at phys.ksu.edu  Mon Sep 10 23:34:25 2007
From: mbrown at phys.ksu.edu (yagyala)
Date: Mon, 10 Sep 2007 20:34:25 -0700
Subject: pipes
Message-ID: <1189481665.242123.172870@k79g2000hse.googlegroups.com>

Hi. I'm trying to communicate with a c++ executable via pipes. I
prefer not to use forks because I want it to work on windows. In
python the code looks roughly like:

(r,w) = pipes()
spawnl(P_WAIT, 'tool.exe', 'dummy', message, str(w))
close(w)
print os.read(r, 1000)
close r

and in c++

int main (int argc, char**argv)
{
     ......
     filedescriptor = atoi(argv[2]);
    message = argv[1];
     FILE * stream = fdopen(filedescriptor, "a");
     cout << fputs(stream, message) << endl;
     .....
     return 0;

}

Sorry for any obvious errors, but I have neither the code nor my c++
reference handy, and I'm quite tired.
When I run the program the line " cout << fputs(stream, message) <<
endl", prints '0', indicating that I am writing to the file. I try
closing the file to be sure it is being flushed. I think I've tried
flushing it while leaving it open to be sure it isn't destroyed. But
no matter what I do, 'message' just sin't getting written back to the
pipe, or at least the python code isnt getting it. If I don't close w
after calling the c++ code the program hangs without responding to
input.

Do I need to be doing this across two processes (ie forking) ?  Any
ideas?
Thanks



From ricaraoz at gmail.com  Mon Sep 24 09:41:22 2007
From: ricaraoz at gmail.com (=?UTF-8?B?UmljYXJkbyBBcsOhb3o=?=)
Date: Mon, 24 Sep 2007 10:41:22 -0300
Subject: scope, modyfing outside object from inside the method
In-Reply-To: <fd7m9s$9fe$1@news2.task.gda.pl>
References: <fd7m9s$9fe$1@news2.task.gda.pl>
Message-ID: <46F7BE82.2050102@bigfoot.com>

Marcin St?pnicki wrote:
> Hello.
> 
> I thought I understand this, but apparently I don't :(. I'm missing
> something very basic and fundamental here, so redirecting me to the
> related documentation is welcomed as well as providing working code :).
> 
> Trivial example which works as expected:
> 
>>>> x = {'a':123, 'b': 456}
>>>> y = x 
>>>> x['a']=890
>>>> y
> {'a': 890, 'b': 456}
> 
> Now, let's try something more sophisticated (it's not real world example,
> I've made up the problem which I think illustrates my issue). Let's say
> I've got such a structure:
> 
> results = [ {'a': 12, 'b': 30 },
>             {'a': 13, 'b': 40 } ]
> 
> I'd like to have each row and column in separate object of self-made
> classes.:
> 
> class mycolumn():
>   def __init__(self, resultset, row, col):
> 	self.value = resultset[row][col]
>   def __str__(self):
> 	return 'Column value: %s' % self.value
> 
> class myrow():
>   def __init__(self):
> 	self.container = {}
>   def __str__ (self):
> 	return self.container
> 
> results = [
> 	{'a': 12, 'b' :30 },
>         {'a': 13, 'b' :40 } 
> ]
> 
> mystruct = []
> 
> for row in results:
> 	mystruct.append ( myrow() )
> 	for col in row:
>  	       	mystruct [len(mystruct)-1].container[col] = \
> 			 mycolumn(results, results.index(row), col)
> 
> print mystruct[0].container['b'] # 12
> results[0]['b'] = 50             # 
> print mystruct[0].container['b'] # also 12 :/
> 
> In other words, I'd like to "map" the results to myrow and mycolumn
> objects, and have these new objects' values changed when I change "results".
> 
> I hope I explained it well enough :). Thank you for your time.
> 

Would this work for you?

class myrow():
  def __init__(self, idict = {}):
	self.container = idict
  def __str__ (self):
	return self.container.__str__()

results = [
	{'a': 12, 'b' :30 },
        {'a': 13, 'b' :40 }
]

mystruct = []

for row in results:
    mystruct.append(myrow(row))

results[1]['b'] = 444

print results  # [{'a': 12, 'b': 30}, {'a': 13, 'b': 444}]

print mystruct # does not work ok , you should probably define
               # mystruct's __str__ method properly

# But, save for the __str__ thingy, the rest is ok.

for row in mystruct:
    print row

# {'a': 12, 'b': 30}
# {'a': 13, 'b': 444}

HTH








From f.guerrieri at gmail.com  Wed Sep 19 11:10:09 2007
From: f.guerrieri at gmail.com (Francesco Guerrieri)
Date: Wed, 19 Sep 2007 17:10:09 +0200
Subject: Find the ID, but how to select/copy the whole string by ID?
In-Reply-To: <1190213936.3371.34.camel@dot.uniqsys.com>
References: <1190209195.493784.133340@q3g2000prf.googlegroups.com>
	<79b79e730709190741i2deb95c8m2982b3201a3fc4be@mail.gmail.com>
	<1190213936.3371.34.camel@dot.uniqsys.com>
Message-ID: <79b79e730709190810i663daab3h1102c7d5662ee4ab@mail.gmail.com>

On 9/19/07, Carsten Haese <carsten at uniqsys.com> wrote:

> , then looking for id 12 is going to match on the wrong ID. Besides,
> that code only tells you where something that looks like the ID you're
> looking for is in the file. There is no guarantee that the match
> actually occurs inside an ID attribute. It also doesn't help in
> retrieving the text contents of the <str> tag that has this ID.
>
> If your input is an XML file, using an actual XML parser is the only
> correct solution.

You're perfectly right.
The code example was purposedly incomplete for this very reason.
It could be made less sensitive to false matches by constructing a
correct substring, something like

pattern = '<str id = ' + stringID + '>'

and then in the loop:

line.find(pattern)

but I agree that it would be wrong to proceed this way.
The motivation of my reply was more to suggest a better way to iterate
over a file than else... but since I've been confusing it probably
would have been better to avoid.

francesco


From gagsl-py2 at yahoo.com.ar  Mon Sep 17 19:08:07 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 17 Sep 2007 16:08:07 -0700
Subject: class that keeps track of instances
In-Reply-To: <fcmu0m$61c$1@geraldo.cc.utexas.edu>
References: <fcmu0m$61c$1@geraldo.cc.utexas.edu>
Message-ID: <1190070487.679308.108120@y42g2000hsy.googlegroups.com>

On 17 sep, 19:10, <yos... at ccwf.cc.utexas.edu> wrote:

> I'd like some advices from more experienced python users.  I want to
> have a class in my python application that does not allow multiple
> instance with same "name".  
>
> I want to have a class (call it kls) that behave at least following way:
>
> 1) New instance has to have a property called 'name'
> 2) When instance is attemped to created, e.g., x=kls(name='myname'), and
> there already exists an instance with obj.name =='myname', that
> pre-existing instance is returned, instead of making new one.  

For all of this I would use the __new__ method.

> 3) A class property 'all' for class gives me a list of all the
> instances.  So kls.all lets me iterates through all instances.
> 4) When all the hard-link to an instance is deleted, the instance should
> be deleted, just like an instance from any regular class does.

I'd store a WeakValueDictionary using the name as a key. Instead of a
property 'all', I'd use a method 'get_all_instances()' that should
call values() on the weak dictionary.

> My question is if i can find metaclass or something that allows me to
> create such class easily.  I tried to search such thing on internet, but
> I even don't know how to call this kind of thing.  It is in a sense like
> singleton, but less restrictive.

Have you tried the Python Cookbook?

> Assuming that I have to write it on my own, what should I do?  I tried
> to implement it using weakref.WeakValueDictionary and metaclass, but
> instance doesn't disappear when I think it should disappear.  I am also
> wondering if it is easier to keeping {name:id(obj)} would be a better
> solution.

A WeakValueDictionary should work. If the instance is not deleted when
you expect, maybe there are other references somewhere, or the garbage
collector didn't run yet.

Ok, finally I wrote an example:

py> from weakref import WeakValueDictionary
py>
py> class OneOfAKind(object):
...     _instances = WeakValueDictionary()
...     def __new__(cls, name):
...         inst = cls._instances.get(name, None)
...         if inst is None:
...             inst = cls._instances[name] = super(OneOfAKind,
cls).__new__(cls
)
...             inst.name = name
...         return inst
...     @classmethod
...     def get_all_instances(cls):
...         return cls._instances.values()
...     __str__ = __repr__ = lambda self: '%s(%r)' %
(self.__class__.__name__, s
elf.name)
...
py> a = OneOfAKind('A')
py> b = OneOfAKind('A')
py> assert b is a
py> c = OneOfAKind('C')
py> assert c is not a
py> print OneOfAKind.get_all_instances()
[OneOfAKind('A'), OneOfAKind('C')]
py> del c
py> import gc
py> gc.collect()
17
py> print OneOfAKind.get_all_instances()
[OneOfAKind('A')]
py> del a
py> del b
py> gc.collect()
0
py> print OneOfAKind.get_all_instances()
[]
py>

--
Gabriel Genellina




From jgardner.jonathangardner.net at gmail.com  Tue Sep 11 16:39:28 2007
From: jgardner.jonathangardner.net at gmail.com (Jonathan Gardner)
Date: Tue, 11 Sep 2007 20:39:28 -0000
Subject: Python Database Apps
In-Reply-To: <mailman.403.1189541226.2658.python-list@python.org>
References: <1189479130.905136.196820@r34g2000hsd.googlegroups.com>
	<mailman.403.1189541226.2658.python-list@python.org>
Message-ID: <1189543168.276429.290180@e34g2000pro.googlegroups.com>

On Sep 11, 1:07 pm, Tom Brown <br... at esteem.com> wrote:
>
> I have had a lot of good luck with PostgreSQL. It is easy to install and use.
> It is also very stable. It maybe overkill for a client side database. The
> psycopg package makes interfacing to PostgreSQL very easy and there is a
> package for Linux and Windows to make cross-platform development a breeze.
>

SQLAlchemy works wonderfully with PostgreSQL. I absolutely love it.

For client-side apps, managing a PostgreSQL installation might be
asking too much. But for a web site or web service, I absolutely
recommend it.



From ivonet at gmail.com  Fri Sep 21 15:09:22 2007
From: ivonet at gmail.com (Ivo)
Date: Fri, 21 Sep 2007 21:09:22 +0200
Subject: Python Regex Question
In-Reply-To: <1190332336.357719.28060@19g2000hsx.googlegroups.com>
References: <1190316811.760038.145850@50g2000hsm.googlegroups.com>
	<46f2c7e8$0$21956$88260bb3@free.teranews.com>
	<1190332336.357719.28060@19g2000hsx.googlegroups.com>
Message-ID: <46f415ff$0$3060$e4fe514c@dreader31.news.xs4all.nl>

crybaby wrote:
> On Sep 20, 4:12 pm, Tobiah <t... at tobiah.org> wrote:
>> joemystery... at gmail.com wrote:
>>> I need to extract the number on each <td tags from a html file.
>>> i.e 49.950 from the following:
>>> <td align=right width=80><font size=2 face="New Times
>>> Roman,Times,Serif">&nbsp;49.950&nbsp;</font></td>
>>> The actual number between: &nbsp;49.950&nbsp; can be any number of
>>> digits before decimal and after decimal.
>>> <td align=right width=80><font size=2 face="New Times
>>> Roman,Times,Serif">&nbsp;######.####&nbsp;</font></td>
>>> How can I just extract the real/integer number using regex?
>> '[0-9]*\.[0-9]*'
>>
>> --
>> Posted via a free Usenet account fromhttp://www.teranews.com
> 
> I am trying to use BeautifulSoup:
> 
>     soup = BeautifulSoup(page)
> 
>     td_tags = soup.findAll('td')
>     i=0
>     for td in td_tags:
>         i = i+1
>         print "td: ", td
>         # re.search('[0-9]*\.[0-9]*', td)
>         price = re.compile('[0-9]*\.[0-9]*').search(td)
> 
> I am getting an error:
> 
>            price= re.compile('[0-9]*\.[0-9]*').search(td)
> TypeError: expected string or buffer
> 
> Does beautiful soup returns array of objects? If so, how do I pass
> "td" instance as string to re.search?  What is the different between
> re.search vs re.compile().search?
> 

I don't know anything about BeautifulSoup, but to the other questions:

var=re.compile(regexpr) compiles the expression and after that you can 
use var as the reference to that compiled expression (costs less)

re.search(expr, string) compiles and searches every time. This can 
potentially be more expensive in calculating power. especially if you 
have to use the expression a lot of times.

The way you use it it doesn't matter.

do:
pattern = re.compile('[0-9]*\.[0-9]*')
result = pattern.findall(your tekst here)

Now you can reuse pattern.

Cheers,
Ivo.


From __peter__ at web.de  Mon Sep 24 06:07:15 2007
From: __peter__ at web.de (Peter Otten)
Date: Mon, 24 Sep 2007 12:07:15 +0200
Subject: Properties and Objects...
References: <mailman.928.1190485247.2658.python-list@python.org>
Message-ID: <fd828j$fkp$01$1@news.t-online.com>

George V. Neville-Neil wrote:

> I have been trying to switch this over to using properties, which seem
> at first glance to be cleaner, but which I am having a lot of problems
> with.  In particular I want to add a property to an object, not a
> class.  

You can't. The underlying mechanism (descriptors) works on the class level.

> The field list in a class is actually relatively static but I
> wind up with ugly code like:
> 
> class ethernet(pcs.Packet):
>     """Ethernet"""
>     __layout__ = pcs.Layout()
>     _map = ethernet_map.map
>     
>     src = pcs.StringField("src", 48)
>     dst = pcs.StringField("dst", 48)
>     type = pcs.Field("type", 16)

>From the piece of code you present I would guess that the above class
attributes are superfluous. Or doesn't pcs.Packet.__init__() do the

self.src = ... 

thingy?

>     def __init__(self, bytes = None, timestamp = None):
>         """initialize an ethernet packet"""
> 
>         src = pcs.StringField("src", 48)
>         dst = pcs.StringField("dst", 48)
>         type = pcs.Field("type", 16)
> 
>         pcs.Packet.__init__(self, [dst, src, type], bytes = bytes)
>         self.description = inspect.getdoc(self)
> 
> and assigning the properties at class time means that it's hard to have
> variations, packets with the same name but with slightly varying field
> lists.

What's so hard about subclassing?

> So, is there a way to assign a property to an object, like this:
> 
>     def __init__(....
>          self.src = property()
> 
> or something like that?

You can make a property that delegates its behaviour, e. g:

import new

def get_src_one(self):
    return 42

class A(object):
    src = property(lambda self: self.get_src())
    def __init__(self, get):
        self.get_src = new.instancemethod(get, self)

a = A(get_src_one)
print a.src

But -- ceterum censeo -- subclassing is probably better, cleaner and
faster. Then instead of calling the class directly make a factory function
that picks the appropriate subclass.

Peter


From http  Tue Sep 11 02:13:57 2007
From: http (Paul Rubin)
Date: 10 Sep 2007 23:13:57 -0700
Subject: Modul (%) in python not like in C?
References: <mailman.294.1189364475.2658.python-list@python.org>
	<TM0Fi.4172$FO2.18@newssvr14.news.prodigy.net>
Message-ID: <7x8x7dvie2.fsf@ruckus.brouhaha.com>

Bryan Olson <fakeaddress at nowhere.org> writes:
> > FIrst of all, how is the % symbol (as in 70%6=4) called in English?
> 
> The operator is usually called "mod". (The symbol is usually
> called "percent".)

In Lisp, we'd say Python implements the mod function and C implements
the rem (remainder) function.  See also the functions floor and
truncate:

http://www.cs.cmu.edu/Groups/AI/html/cltl/clm/node130.html


From asma61 at dsl.pipex.com  Sat Sep  8 21:16:40 2007
From: asma61 at dsl.pipex.com (DaveM)
Date: Sun, 09 Sep 2007 02:16:40 +0100
Subject: Spell-checking Python source code
References: <1189285495.185657.88010@o80g2000hse.googlegroups.com>
Message-ID: <s8i6e3prdvsld9aetjoo9k8lr54i3rq7cv@4ax.com>

On Sat, 08 Sep 2007 14:04:55 -0700, John Zenger <johnzenger at gmail.com>
wrote:

> In an ideal world, my IDE would do this with a red wavy line.

I can't help with your problem, but this is the first thing I turn off in
Word. It drives me _mad_. 

Sorry - just had to share that.

DaveM


From steve at REMOVE-THIS-cybersource.com.au  Wed Sep 12 08:42:58 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Wed, 12 Sep 2007 12:42:58 -0000
Subject: An ordered dictionary for the Python library?
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
Message-ID: <13efnmi4n959a59@corp.supernews.com>

On Wed, 12 Sep 2007 07:33:45 +0000, Mark Summerfield wrote:

> I feel that Python lacks one useful data structure: an ordered
> dictionary.
> 
> I find such data structures v. useful in C++.
[snip]


Personally, I've never missed an ordered dict. What do people use them 
for?

In fact, I'm not sure what people mean by ordered dicts. I assume they 
mean the keys are ordered, not the values. But ordered by what? Insertion 
order? Modification order? Alphabetical order? 


-- 
Steven.


From mccredie at gmail.com  Thu Sep  6 19:30:39 2007
From: mccredie at gmail.com (Matimus)
Date: Thu, 06 Sep 2007 23:30:39 -0000
Subject: Subclassing zipfile (new style class)
In-Reply-To: <H8KdnVfPDO28F33bnZ2dnUVZ_i2dnZ2d@comcast.com>
References: <H8KdnVfPDO28F33bnZ2dnUVZ_i2dnZ2d@comcast.com>
Message-ID: <1189121439.945643.135660@r29g2000hsg.googlegroups.com>

> import zipfile
> class walkZip(zipfile):
>      pass
>
> if __name__ == "__main__":
>      print "Hello World"


`zipfile' is the name of the module, not a class. What you probably
want is this:

[code]
import zipfile
class WalkZip(zipfile.ZipFile):
    pass

if __name__ == "__main__":
    print "hello world"
[/code]

Matt



From BjornSteinarFjeldPettersen at gmail.com  Tue Sep 25 12:55:21 2007
From: BjornSteinarFjeldPettersen at gmail.com (thebjorn)
Date: Tue, 25 Sep 2007 09:55:21 -0700
Subject: sorting a list numbers stored as strings
In-Reply-To: <13fi0na7rhfl90d@corp.supernews.com>
References: <mailman.1028.1190696259.2658.python-list@python.org>
	<13fi0na7rhfl90d@corp.supernews.com>
Message-ID: <1190739321.755370.262290@57g2000hsv.googlegroups.com>

On Sep 25, 2:45 pm, Steven D'Aprano <st... at REMOVE-THIS-
cybersource.com.au> wrote:
> On Tue, 25 Sep 2007 12:46:54 +0800, Delaney, Timothy (Tim) wrote:
> > Carsten Haese wrote:
>
> >> On Mon, 2007-09-24 at 19:58 +0800, Delaney, Timothy (Tim) wrote:
> >>> I'm sure that in some version of Python it would have given a
> >>> ValueError (due to the default radix being 0) but it appears to have
> >>> changed to a default radix of 10 somewhere along the way.
>
> >> Not even Python 1.5.2 seems to have a problem with leading zeroes:
>
> >> Python 1.5.2 (#1, Nov  6 1999, 14:53:40) [C] on sco_sv3 Copyright
> >> 1991-1995 Stichting Mathematisch Centrum, Amsterdam
> >>>>> int("08")
> >> 8
>
> > Yep - appears I must have been misremembering from another language
> > (dunno which) or I misinterpreted the docs.
>
> I also remember something in Python about leading zeroes leading to
> "surprising" effects... ah, I got it!
>
> >>> int("020")
> 20
> >>> 020
> 16

You can get the latter behavior using eval:

>>> eval("020")
16
>>> eval("09")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<string>", line 1
    09
    ^
SyntaxError: invalid token
>>>

This usually bites you in the @$$ when you're trying to store config
data as a Python datastructure in an external file -- so that you can
do config_data = eval(open('config.data').read()).

-- bjorn



From gagsl-py2 at yahoo.com.ar  Tue Sep  4 23:45:09 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 05 Sep 2007 00:45:09 -0300
Subject: Undeterministic strxfrm?
References: <ixaDi.63$327.50@read3.inet.fi>
	<mailman.37.1188933223.2658.python-list@python.org>
	<lKiDi.237$327.182@read3.inet.fi>
	<fbkhdb$epk$00$1@news.t-online.com>
	<htnDi.259$327.117@read3.inet.fi>
Message-ID: <op.tx5wpjqxx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 04 Sep 2007 22:18:05 -0300, Tuomas <tuomas.vesterinen at pp.inet.fi>  
escribi?:

> Peter Otten wrote:
>> Python seems to be the culprit as there is a relatively recent
>> strxfrm-related bugfix, see
>
> Thanks Peter. Can't find it, do you have the issue number?

I think it's not in the issue tracker - see  
http://xforce.iss.net/xforce/xfdb/34060
The fix is already in 2.5.1  
http://www.python.org/download/releases/2.5.1/NEWS.txt

> Reading the rev 54669 it seems to me, that the bug is not fixed. Man  
> says:
>
> STRXFRM(3): ... size_t strxfrm(char *dest, const char *src, size_t n);
> ... The first n characters of  the  transformed  string
> are  placed in dest.  The transformation is based on the program?s
> current locale for category LC_COLLATE.
> ... The strxfrm() function returns the number of bytes required to
> store  the transformed  string  in dest excluding the terminating ?\0?
> character.  If the value returned is n or more, the contents of dest are
> *indeterminate*.
>
> Accordin the man pages Python should know the size of the result it
> expects and don't trust the size strxfrm returns. I don't completely
> understand the collate algorithm, but it should offer different levels
> of collate. So Python too, should offer those levels as a second
> parameter. Hovever strxfrm don't offer more parameters either except
> there is another function strcasecmp. So Python should be able to
> calculate the expected size before calling strxfrm or strcasecmp. I
> don't how it is possible. May be strcoll knows better and I should kick
> strxfrm off and take strcoll instead. It costs converting the seach key
> in every step of the search.

No. That's why strxfrm is called twice: the first one returns the required  
buffer size, the buffer is resized, and strxfrm is called again. That's a  
rather common sequence when buffer sizes are not known in advance.
[Note that `dest` is indeterminate, NOT the function return value which  
always returns the required buffer size]

-- 
Gabriel Genellina



From gagsl-py2 at yahoo.com.ar  Wed Sep 26 00:19:47 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 26 Sep 2007 01:19:47 -0300
Subject: stopping a while True: with the keyboard
References: <46F9B38C.2090406@11h11.com>
Message-ID: <op.ty8ua9v4x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 25 Sep 2007 22:19:08 -0300, patrick <puredata at 11h11.com> escribi?:

> i am looking for a way to break a while True: when pressing "s" on my
> keyboard. how can i do this?

Windows only: Using the msvcrt module:

   from msvcrt import kbhit, getch
   a, b = 1, 1
   while True:
     a, b = a+b, a
     print a
     if kbhit() and getch() in 'sS':
       print "\nThanks!"
       break

There is a portable getch recipe in the Python Cookbook:  
<http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/134892> that  
supposedly should work on Windows, Linux and Mac OSX too.

If you just want to break the loop, and don't care too much in which state  
your variables remain, you can use Ctrl-C and catch the KeyboardInterrupt:

   a, b = 1, 1
   try:
     while True:
       a, b = a+b, a
       print a
   except KeyboardInterrupt:
     print "\nThanks!"
   ... continue program ...

-- 
Gabriel Genellina



From perl4hire at softouch.on.ca  Wed Sep 12 20:30:54 2007
From: perl4hire at softouch.on.ca (Amer Neely)
Date: Wed, 12 Sep 2007 20:30:54 -0400
Subject: Coming from Perl
Message-ID: <Cv%Fi.198$372.59@read2.cgocable.net>

I'm a complete newbie with Python, but have several years experience 
with Perl in a web environment.

A question I have, if someone here is familiar with Perl, does Python 
have something like Perl's 'here document'? I've just searched and read 
some postings on generating HTML but they all seem to refer to various 
template utilities. Is this the only way, or am I missing something? I'm 
used to generating X/HTML by hand, which makes the here document in Perl 
ideal for me. Also, many times a client already existing HTML code that 
I can use in a script.

-- 
Amer Neely
w: www.webmechanic.softouch.on.ca/
Perl | MySQL programming for all data entry forms.
"Others make web sites. We make web sites work!"


From steve at holdenweb.com  Sun Sep 16 19:25:05 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 16 Sep 2007 19:25:05 -0400
Subject: Try this
In-Reply-To: <1189983233.709832.124290@19g2000hsx.googlegroups.com>
References: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>	<13eqsdfsfvsa16f@corp.supernews.com>	<1189969529.652871.19280@50g2000hsm.googlegroups.com>	<mailman.621.1189970593.2658.python-list@python.org>	<1189979679.969074.216490@y42g2000hsy.googlegroups.com>	<1189981681.745195.18130@y42g2000hsy.googlegroups.com>
	<1189983233.709832.124290@19g2000hsx.googlegroups.com>
Message-ID: <fcke0g$9pb$2@sea.gmane.org>

mensanator at aol.com wrote:
> On Sep 16, 5:28?pm, John Machin <sjmac... at lexicon.net> wrote:
>> On Sep 17, 7:54 am, "mensana... at aol.com" <mensana... at aol.com> wrote:
>>
>>
>>
>>
>>
>>> On Sep 16, 2:22?pm, Steve Holden <st... at holdenweb.com> wrote:
>>>> mensana... at aol.com wrote:
>>>>> On Sep 16, 1:10?pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
>>>>>> On Sun, 16 Sep 2007 01:46:34 -0700, GeorgeRXZ <george... at gmail.com>
>>>>>> declaimed the following in comp.lang.python:
>>>>>>> Then Open the Notepad and type the following sentence, and save the
>>>>>>> file and close the notepad. Now reopen the file and you will find out
>>>>>>> that, Notepad is not able to save the following text line.
>>>>>>> Well you are speed
>>>>>>> This occurs not only with above sentence but any sentence that has
>>>>>>> 4 3 3 5 (sequence of characters: Well=4 you=3 are=3 speed=5)
>>>>>>         I tried. I also opened the saved file in SciTE...
>>>>>> And the text WAS there...
>>>>>>         It is Notepad that can not properly render what it,
>>>>>> itself, saved.
>>>>> C:\Documents and Settings\mensanator\My Documents>type huh.txt
>>>>> Well you are speed
>>>>> Yes, file was saved correctly.
>>>>> But reopening it shows 9 unprintable characters.
>>>>> If I copy those to a new file (huh1.txt):
>>>>> C:\Documents and Settings\mensanator\My Documents>type huh1.txt
>>>>> ?????????
>>>>> But wait...the new file is 20 characters, not 9.
>>>>> 09/16/2007  01:44 PM                18 huh.txt
>>>>> 09/16/2007  01:54 PM                20 huh1.txt
>>>>> C:\Documents and Settings\mensanator\My Documents>dump huh.txt
>>>>> huh.txt:
>>>>> 00000000  5765 6c6c 2079 6f75 2061 7265 2073 7065 Well you are spe
>>>>> 00000010  6564                                    ed
>>>>> Here's what it's actually doing:
>>>>> C:\Documents and Settings\mensanator\My Documents>dump huh1.txt
>>>>> huh1.txt:
>>>>> 00000000  fffe 5765 6c6c 2079 6f75 2061 7265 2073 .~Well you are s
>>>>> 00000010  7065 6564                               peed
>>>> One word: Unicode.
>>>> The "open" and "save" dialogs allow you to specify an encoding.
>>> And the encoding specified was ANSI.
>>>> If you
>>>> specify Unicode the you will get what you see above.
>>> And if you specify ANSI _before_ you click the file name,
>>> the specification switches to Unicode and has to then
>>> be manually switched back to ANSI.
>>>> If you specify ANSI
>>>> you will get the text you entered.
>>> It's still a bug in the "open" dialog.
>> It's more like a bug/feature in its encoding detector.
> 
> It is NOT a feature. If I save something as ANSI,
> there is no excuse for it not to re-open in ANSI.
> 
>> I can get it to
>> switch to Unicode only if there's an even number of characters AND the
>> line is NOT terminated by CRLF -- add/remove one alpha character, or
>> hit the enter key at the end of the line, and it won't detect it as
>> Unicode when you open it again.
>>
>> You only get the BOM (0xfffe) if you are silly enough to save it while
>> it's open in Unicode mode.
> 
> That was a test. I wasn't so stupid as to save
> to the original file, but to make a copy.
> 
>>
>>
>>>> By the way, this has precisely what to do with Python?
>>> I've been known to use Notepad to create Python
>>> source code.
>> Your source code would have to be trivially short to trigger the
>> strange behaviour.
> 
> Makes you wonder what other edge cases aren't
> handled properly.
> 
> Makes you wonder why Microsoft doesn't employ
> professional programmers.
> 
Makes *me* wonder why you haven't got better things to do with your time.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From grante at visi.com  Tue Sep 18 15:51:54 2007
From: grante at visi.com (Grant Edwards)
Date: Tue, 18 Sep 2007 19:51:54 -0000
Subject: Tutorial or Example (or Tutorial) of Using Canvas to Produce a
	Plot
References: <phRHi.50851$Um6.35199@newssvr12.news.prodigy.net>
	<13evohih7rkd030@corp.supernews.com>
	<WPTHi.5906$FO2.4148@newssvr14.news.prodigy.net>
Message-ID: <13f0b2qlvj5ige6@corp.supernews.com>

On 2007-09-18, W. Watson <wolf_tracks at invalid.com> wrote:

> What would be appropriate? What are the choices? I'm pretty new to Python, 
> but am familiar with the XWindow widget set.

There's no such thing as "the XWindow widget set".  There are
at least 8-10 different X Windows widget sets.  The ones that I
can name off the top of my head:

 Tk
 Athena
 Motif
 FLTK
 GTK
 Qt
 XRT 
 WxWidgets (actually sort of meta-widget-set)

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

http://en.wikipedia.org/wiki/List_of_widget_toolkits#On_Unix.2C_under_the_X_Window_System
 
-- 
Grant Edwards                   grante             Yow! As President I have
                                  at               to go vacuum my coin
                               visi.com            collection!


From gregpinero at gmail.com  Wed Sep  5 22:47:08 2007
From: gregpinero at gmail.com (gregpinero at gmail.com)
Date: Thu, 06 Sep 2007 02:47:08 -0000
Subject: Give List to Format String - How To
Message-ID: <1189046828.313284.235210@o80g2000hse.googlegroups.com>

I might just be being dumb tonight, but why doesn't this work:

>>> '%s aaa %s aa %s' % ['test' for i in range(3)]
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: not enough arguments for format string

(I'm in Python 2.4 if that matters)

Thanks,

Greg



From jstroud at mbi.ucla.edu  Tue Sep 25 16:30:04 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Tue, 25 Sep 2007 13:30:04 -0700
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <mailman.1040.1190717047.2658.python-list@python.org>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>	<59e9fd3a0709250313v76a7626dn69908b39e4ba100b@mail.gmail.com>
	<mailman.1040.1190717047.2658.python-list@python.org>
Message-ID: <fdbr29$fdg$2@daisy.noc.ucla.edu>

Mark Summerfield wrote:
> Hmmm, managed to confuse myself with 'b' and 'd'!
> 
> d = sorteddict({1:"one", 3:"three", 5:"five", 99:"ninetynine"})
> 
> d.items()
> 
> [(1, 'one'), (3, 'three'), (5, 'five'), (99, 'ninetynine')]
> 
> d[3], d.value(3)
> 
> ('three', 'ninetynine')
> 
> So using [] returns the value for the given key and using value()
> returns the value for the given index position.
> 

I didn't read enough messages. My last post is redundant.


From software at ginstrom.com  Wed Sep 12 07:16:16 2007
From: software at ginstrom.com (Ryan Ginstrom)
Date: Wed, 12 Sep 2007 20:16:16 +0900
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
Message-ID: <043301c7f52e$5673f850$0203a8c0@MOUSE>

> On Behalf Of Charles Fox
> described mathematically in papers, by equations like
>     a_dot = -k(a-u)
> In other languages, this translates nicely into code, but as 
> far as I can tell, Python needs the ugly:
>     self.a_dot = -self.k(self.a-self.u)

In addition to the other advice you've received, if you don't need to
preserve state, you could avoid the "self" business by putting your
functions in a module instead of an object.

def k(a):
    return a**3

def dot(a, u)
    return -k(a-u)

Python modules are also objects, so they can serve in place of class
instances much of the time.

Regards,
Ryan Ginstrom



From gagsl-py2 at yahoo.com.ar  Mon Sep 17 05:30:40 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 17 Sep 2007 06:30:40 -0300
Subject: Python Unicode to String conversion
References: <1188600916.528901.189680@d55g2000hsg.googlegroups.com>
	<1188631034.968347.116170@d55g2000hsg.googlegroups.com>
	<1189962693.168033.258520@d55g2000hsg.googlegroups.com>
	<1190003594.207618.314480@22g2000hsm.googlegroups.com>
Message-ID: <op.tyskpel7x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 17 Sep 2007 01:33:14 -0300, Richard Levasseur  
<richardlev at gmail.com> escribi?:

> When dealing with unicode, i've run into situations where I have
> multiple encodings in the same string, usually latin1 and utf8
> (latin1 != ascii, and latin1 != utf8, and they don't play nice
> together). So, for future readers, if you have problems dealing with
> unicode encode and decode, try using a mix of latin1 and utf8
> encodings to figure out whats going on, and what characters are
> fubar'ing the process.

Life is easier if you follow these guidelines:
- work internally always in Unicode (not strings)
- All input data (read from files, coming from an Internet connection,  
typed by user...) should be decoded from byte strings into unicode as  
early as possible. (You should know which encoding your data comes in, in  
each case)
- All output data (written to files, printing to screen, etc) is encoded  
 from unicode into byte strings as late as possible.

This way, unless your input data is garbage, you never could mix strings  
 from different encodings.
For further information, read the Unicode Howto  
<http://www.amk.ca/python/howto/unicode> and this excerpt form the "Python  
Cookbook", by Alex Martelli  
<http://www.onlamp.com/pub/a/python/excerpt/pythonckbk_chap1/index.html>

-- 
Gabriel Genellina



From ldo at geek-central.gen.new_zealand  Mon Sep 10 03:54:49 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 10 Sep 2007 19:54:49 +1200
Subject: Python syntax wart
References: <fbvvil$7dj$1@lust.ihug.co.nz> <5khh6nF3i5nuU1@mid.uni-berlin.de>
	<46E390B7.2080808@web.de> <fc0518$aa2$5@lust.ihug.co.nz>
	<5ki2sdF3nr68U1@mid.individual.net> <fc2c52$i1l$3@lust.ihug.co.nz>
	<5kk8p0F3vfqqU1@mid.uni-berlin.de>
Message-ID: <fc2t89$rik$4@lust.ihug.co.nz>

In message <5kk8p0F3vfqqU1 at mid.uni-berlin.de>, Marc 'BlackJack' Rintsch
wrote:

> On Mon, 10 Sep 2007 15:02:58 +1200, Lawrence D'Oliveiro wrote:
> 
>> In message <5ki2sdF3nr68U1 at mid.individual.net>, Bjoern Schliessmann
>> wrote:
>> 
>>> Lawrence D'Oliveiro wrote:
>>>> But then you can no longer use indentation to display the
>>>> two-dimensional structure of the statement.
>>> 
>>> How can a statement be two-dimensional?
>> 
>> Like this (from C++ code, but the idea is the same):
>> 
>>     if
>>       (
>>             ThisCh >= 'A' and ThisCh <= 'Z'
>>         or
>>             ThisCh >= '0' and ThisCh <= '9'
>>         or
>>             ThisCh == '_'
>>         or
>>             ThisCh == '.'
>>       )
>>         ...
> 
> I still down see the second dimension.

Horizontal + vertical = 2 dimensions.

A more complicated example:

    if
      (
            TheProduct == JobSettings.Product.end()
        or
                TheProduct->second.PerType != ProductPerPerson
            and
                TheProduct->second.PerType != ProductPerNone
      )
        ...


From timr at probo.com  Tue Sep 25 01:32:42 2007
From: timr at probo.com (Tim Roberts)
Date: Tue, 25 Sep 2007 05:32:42 GMT
Subject: directpython question
References: <fd5apt029m@enews1.newsguy.com>
Message-ID: <aq6hf3dk1ouodp2q5nr7f7fv210r2djg9k@4ax.com>

"veki" <vedrandekovic at v-programs.com> wrote:
>
>Hello,
>I've got IBM Thinkpad 30 laptop with configuration:
>...
>,then I have been install directx 9.0c,Python 2.5 and directpython for
>python 2.5.On my two computers directpython works but on this
>laptop it don't want work e.g:
>
>When I want execute this script on laptop:
>
>import d3dx
>frame=d3dx.Frame(u'SOME FRAME')
>frame.mainloop()
>
>I get this error:
>...
>RuntimeError: No valid mode found

The R30 has kind of a wimpy graphics chip.  What graphics mode are you in?
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From zunbeltz at gmail.com  Fri Sep  7 10:17:53 2007
From: zunbeltz at gmail.com (zunbeltz at gmail.com)
Date: Fri, 07 Sep 2007 07:17:53 -0700
Subject: exponential float formmating
In-Reply-To: <5kd2q6F31i6hU4@mid.uni-berlin.de>
References: <1189170499.945175.275210@57g2000hsv.googlegroups.com>
	<5kd2q6F31i6hU4@mid.uni-berlin.de>
Message-ID: <1189174673.600550.288440@50g2000hsm.googlegroups.com>

On 7 sep, 15:42, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Fri, 07 Sep 2007 06:08:19 -0700, zunbeltz wrote:
> > For compatibility reasons with an old program I have to format string
> > in exponential format with the following format
>
> > 0.xxxxxE-yy
>
> > This means that the number start always by 0 and after the exponent
> > there should be alway the sing and 2 number for the exponent.
>
> > for example 13 shoud be 0.13000E+02
> > I always get 1.30000E001
>
> I don't know if this is platform dependent but this works for me:
>
> In [41]: '%e' % 1.3
> Out[41]: '1.300000e+00'
>
> In [42]: ('%e' % 1.3).upper()
> Out[42]: '1.300000E+00'
>
> Ciao,
>         Marc 'BlackJack' Rintsch

I am working in windows I get
>>> '%e' % 13
'1.300000e+001'

In all cases I need the number to start with 0
0.13000E+01



From bignose+hates-spam at benfinney.id.au  Thu Sep  6 20:00:50 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 07 Sep 2007 10:00:50 +1000
Subject: Getting original working directory
References: <mailman.171.1189104427.2658.python-list@python.org>
Message-ID: <87sl5r5op9.fsf@benfinney.id.au>

Please don't top-post. Instead, trim the parts you're not replying to
(preserving the attribution line so we can see who wrote what), and
put your reply beneath those, so your message reads in normal
chronological order.

rave247 rave247 <rave247 at seznam.cz> writes:

> If I could use os.getcwd() or save the value to some variable before
> calling os.chdir() I would do it, believe me. However I can't
> because it is the part of code where I can't do any changes.

Then why not get the value from 'os.getcwd()' *before* calling the
"part of code where you can't make changes"? You're the one writing
the program, you can decide which actions happen in which order.

> So this information has to be stored somewhere (probably in shell
> which runs the interpreter)

In the parent process of the Python program, yes.

> and there *must* be a way how to get it.

This doesn't follow at all. Child processes get only a small,
well-specified set of values from their parent (via the operating
system), and are deliberately restricted from poking around inside
their parent. Think for a while on how you'd have to write such a
parent process to account for such meddling and you'll appreciate why.

> Simply after calling os.chdir() the original value doen't disappear

For the current running process, it does. Just as in Python binding a
different value to a name means the previous value is lost ? unless
you bind that previous value somewhere else first so you can get at it
again.

-- 
 \         "I got up the other day, and everything in my apartment has |
  `\       been stolen and replaced with an exact replica."  -- Steven |
_o__)                                                           Wright |
Ben Finney


From gslindstrom at gmail.com  Fri Sep  7 15:14:12 2007
From: gslindstrom at gmail.com (Greg Lindstrom)
Date: Fri, 7 Sep 2007 14:14:12 -0500
Subject: Python and Cron
Message-ID: <a9f39a410709071214h69a22fbcnbc40fa3ecd7ac96c@mail.gmail.com>

> "Shawn Milochik" <Shawn at Milochik.com>
> Could you send the output of "crontab -l" and the script you're running?
>
> It's probably an environment issue of some kind, but it's hard to say
> what blindly.



# run client pricing at 0215 (p) Monday-Friday
15 2 * * 1-5 cd /m01/edith/src && /usr/bin/python /m01/edith/src/driver.py
--paid-date yesterday --jobname professional >>
/m01/edith/stdout/ecomppo.stdout 2&>1

I've emailed parts of the script in another reply.

Thanks for your time,
--greg
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From kay.schluehr at gmx.net  Wed Sep 19 06:08:36 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Wed, 19 Sep 2007 03:08:36 -0700
Subject: Metatest 0.1.0
In-Reply-To: <46F05FB1.7070807@pytex.org>
References: <mailman.721.1190126947.2658.python-announce-list@python.org>
	<1190130384.753009.142150@i13g2000prf.googlegroups.com>
	<46F006D5.3060609@pytex.org>
	<1190147863.968759.229330@g4g2000hsf.googlegroups.com>
	<46F05FB1.7070807@pytex.org>
Message-ID: <1190196516.575165.175880@50g2000hsm.googlegroups.com>

On 19 Sep., 01:30, Jonathan Fine <jf... at pytex.org> wrote:

> > there is no fundamental reason why it can't be separated from
> > eeconsole.py.
>
> OK.  That might be a good idea.

Ironically, I liked the idea of having more expressive assert
statements - a discussion you brought up. But this requires either
syntcatical analysis in the general case ( EE and assert magic ) some
particular API ( Ben Finney ) or a somewhat restricted, but fully
embedded, domain specific language ( Metatest ).

Here is what I got after an hour of hacking and filtering assert.
Additional remarks are in line comments:

_______________________________________________________________________________

 ZERO

 On Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
(Intel)]

 Reuses session report ZERO_20.eerp

_______________________________________________________________________________

# define a test function add and check it out

>>> def add(y,x):
...     return x+y
...
>>> assert add(1,2) == 0
Traceback (most recent call last):
  File "<input>", line 1, in <module>
AssertionError: 3 == 0

# An tested assertion is splitted into lhs, op, rhs. If this is not
possible assert
# won't be changed by magics.
# Here we see a simple formatting of the result in the form:
#     "%s %s %s" % (eval(lhs), op, eval(rhs))
# More elaborated formatting schemes are user defined:

>>> class MyFormatter(AssertionFormatter):
... 	def format(self, lhs, op, rhs):
... 		if op == "==":
... 			return "Expected: %s. Received: %s"%(lhs, rhs)
... 		else:
... 			return super(MyFormatter, self).format(lhs, op, rhs)
...

# The class AssertionFormatter is defined in
EasyExtend.fibers.zero.fiber.
# It provides a single method
#
#        format(lhs: str, op: str, rhs: str) -> str
#
# The default behaviour is the one
# demonstrated above. One can overwrite format in subclasses and pass
the subclass
# instance to assert.
# The arguments will be supplied by the framework.


# Here we see the new formatter in action:

>>> assert add(1,2) == 0, MyFormatter
Traceback (most recent call last):
  File "<input>", line 1, in <module>
AssertionError: Expected: 3. Received: 0

# Now it falls back to the default formatting:

?>>>
>>> !
>>> assert add(1,2) <=0, MyFormatter
Traceback (most recent call last):
  File "<input>", line 1, in <module>
AssertionError: 3 <= 0
>>> quit

--------------------.
Recorded assertions |
--------------------------------------------------------------------------------------------------
Status |eerp ln|repl ln| Assertion
-------+-------+-------
+--------------------------------------------------------------------------
ERROR  | 14    | 14    | assert add(1,2) == 0
ERROR  | 26    | 26    | assert add(1,2) == 0, MyFormatter
ERROR  | 31    | 31    | assert add(1,2) <=0, MyFormatter
-------+-------+-------
+--------------------------------------------------------------------------

Regards, Kay



From kyosohma at gmail.com  Tue Sep 18 15:31:48 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Tue, 18 Sep 2007 19:31:48 -0000
Subject: Extracting xml from html
In-Reply-To: <mailman.676.1190065903.2658.python-list@python.org>
References: <1190061079.025479.129070@w3g2000hsg.googlegroups.com>
	<mailman.676.1190065903.2658.python-list@python.org>
Message-ID: <1190143908.594470.244440@y42g2000hsy.googlegroups.com>

On Sep 17, 4:51 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Mon, 17 Sep 2007 17:31:19 -0300, <kyoso... at gmail.com> escribi?:
>
> > I am attempting to extract some XML from an HTML document that I get
> > returned from a form based web page. For some reason, I cannot figure
> > out how to do this. I thought I could use the minidom module to do it,
> > but all I get is a screwy traceback:
>
> > Traceback (most recent call last):
> >   File "C:\Python24\lib\xml\dom\expatbuilder.py", line 207, in
> > parseFile
> >     parser.Parse(buffer, 0)
> > ExpatError: mismatched tag: line 1, column 357
>
> So your HTML is not a well formed XML document, as many html pages, and
> you can't use an XML parser. (even a valid HTML document may not be valid
> XML). Let's try with some mismatched tags:

> Depending on your document, you may prefer to extract the XML blocks using
> BeautifulSoup, and then parse each one using BeautifulStoneSoup (the XML
> parser) or xml.etree.ElementTree
>
> --
> Gabriel Genellina

Thanks for the reply. I already knew about BeautifulSoup but I was
hoping to avoid installing *yet another module* on my PC. I got it to
work with lxml, but it's not very pretty. See my reply to Stefan.

Mike



From kyosohma at gmail.com  Wed Sep  5 14:05:34 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 05 Sep 2007 18:05:34 -0000
Subject: Text processing and file creation
In-Reply-To: <5k85ghF2hvr3U1@mid.individual.net>
References: <1189008809.718361.45790@g4g2000hsf.googlegroups.com>
	<1189009392.762504.87070@19g2000hsx.googlegroups.com>
	<5k85ghF2hvr3U1@mid.individual.net>
Message-ID: <1189015534.548982.318010@k79g2000hse.googlegroups.com>

On Sep 5, 11:57 am, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:
>  kyoso... at gmail.com wrote:
> > I would use a counter in a for loop using the readline method to
> > iterate over the 20,000 line file.
>
> file objects are iterables themselves, so there's no need to do that
> by using a method.

Very true! Darn it!

>
> > Reset the counter every 5 lines/ iterations and close the file.
>
> I'd use a generator that fetches five lines of the file per
> iteration and iterate over it instead of the file directly.
>

I still haven't figured out how to use generators, so this didn't even
come to mind. I usually see something like this example for reading a
file:

f = open(somefile)
for line in f:
    # do something


http://docs.python.org/tut/node9.html

Okay, so they didn't use readline. I wonder where I saw that.

> > Have fun!
>
> Definitely -- and also do your homework yourself :)
>
> Regards,
>
> Bj?rn
>
> --
> BOFH excuse #339:
>
> manager in the cable duct

Mike



From ivoras at __fer.hr__  Sun Sep 16 16:07:07 2007
From: ivoras at __fer.hr__ (Ivan Voras)
Date: Sun, 16 Sep 2007 22:07:07 +0200
Subject: Python "with"
Message-ID: <fck2di$7to$1@ss408.t-com.hr>

Hi,

I'm looking for a construct that's similar to (Turbo) Pascal's "with"
statement. I read about the Python's new "with" statement, but I was
dissapointed to learn that it does something different (I still don't
see how it's better than try..except..finally, but that's not my question).

Is there something similar to what I want that's Pythonic enough?

(If you're not familiar with Pascal, here's how it works:

with some.big.structure.or.nested.objects.element do begin
     member1 := something;
     member2 := something;
end;

which exactly translates to this equivalent:

some.big.structure.or.nested.objects.element.member1 := something;
some.big.structure.or.nested.objects.element.member2 := something;

i.e. it's a wrist-saver. I think a similar feature exists in C99, for
structs.

I know it can be almost always done by using a temporary variable:

tmp = some.big.structure.or.nested.objects.element
tmp.member1 = something
tmp.member2 = something

but this looks ugly to me.)

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From martin at v.loewis.de  Sat Sep  1 08:38:50 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 01 Sep 2007 14:38:50 +0200
Subject: How to find out if the interpreter is a debug build?
In-Reply-To: <1188643450.431001.219220@o80g2000hse.googlegroups.com>
References: <1188609417.273513.74450@i13g2000prf.googlegroups.com>
	<46d905d5$0$26151$9b622d9e@news.freenet.de>
	<1188643450.431001.219220@o80g2000hse.googlegroups.com>
Message-ID: <46d95d5a$0$9015$9b622d9e@news.freenet.de>

> It is a huge problem and weakness of python

Would you like to contribute a patch?

Regards,
Martin


From jchurchill at open-it.org  Tue Sep 25 18:51:37 2007
From: jchurchill at open-it.org (John Churchill)
Date: Tue, 25 Sep 2007 15:51:37 -0700 (PDT)
Subject: jack audio connection kit
In-Reply-To: <46F956FE.3090803@11h11.com>
References: <46F956FE.3090803@11h11.com>
Message-ID: <Pine.LNX.4.64.0709251547120.1112@kodama.stanford.edu>

On Tue, 25 Sep 2007, patrick wrote:

> hello everyone,
>
> is there a way to make python output audio in jack:
> http://jackaudio.org/
>
> jack is the best audio solution for linux, mac and lately windows. i
> found 1 project called pyjack, but the author remove the software from
> his website.
>
> that would be neat!
> pat
>

Hi Pat,

I'd take a look at pygame ( http://www.pygame.org ).  Specifically, the 
conch music sound toolkit.  You should be able to play audio that way.

-John


From chris.olekas at gmail.com  Mon Sep 10 12:05:34 2007
From: chris.olekas at gmail.com (Chris)
Date: Mon, 10 Sep 2007 09:05:34 -0700
Subject: Silent SaveAs when using the Excel win32com module
In-Reply-To: <1189439861.200686.245420@k79g2000hse.googlegroups.com>
References: <1189439861.200686.245420@k79g2000hse.googlegroups.com>
Message-ID: <1189440334.351120.307380@19g2000hsx.googlegroups.com>

On Sep 10, 11:57 am, Chris <chris.ole... at gmail.com> wrote:
> I'm trying to create an excel file which will act as a log, however I
> want to overwrite the file if it exists.
>
> Looking at the SaveAs method I can't find anything that would allow
> it. I don't want the prompt to appear to ask whether to replace the
> file or not. I just want to replace it without thinking.
>
> Thanks in advance.

Googling around I found that a way around this is to just delete the
file before you save (if it exists)... any other solutions?



From bdesth.quelquechose at free.quelquepart.fr  Sat Sep  8 14:06:45 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 08 Sep 2007 20:06:45 +0200
Subject: creating really big lists
In-Reply-To: <1188985838.661821.41530@k79g2000hse.googlegroups.com>
References: <1188985838.661821.41530@k79g2000hse.googlegroups.com>
Message-ID: <46e5b1b4$0$30530$426a74cc@news.free.fr>

Dr Mephesto a ?crit :
> Hi!
> 
> I would like to create a pretty big list of lists; a list 3,000,000
> long, each entry containing 5 empty lists. My application will append
> data each of the 5 sublists, so they will be of varying lengths (so no
> arrays!).
> 
> Does anyone know the most efficient way to do this? 

Hem... Did you consider the fact that RAM is not an unlimited resource?

Let's do some simple math (please someone correct me if I'm going off 
the road): if a Python (empty) list object required 256 bits (if I refer 
to some old post by GvR, it's probably more - 384 bytes at least. Some 
Python guru around ?), you'd need (1 + (3000000 * 5)) * 256 bits just to 
build this list of lists. Which would make something around 3 Gb. Not 
counting all other needed memory...

FWIW, run the following code:

# eatallramthenswap.py
d = {}
for i in xrange(3000000):
   d[i] = ([], [], [], [], [])

And monitor what happens with top...





From trekker182 at comcast.net  Thu Sep 27 12:46:08 2007
From: trekker182 at comcast.net (Shawn Minisall)
Date: Thu, 27 Sep 2007 12:46:08 -0400
Subject: ValueError: too many values to unpack
Message-ID: <46FBDE50.4080503@comcast.net>

I am trying to read a few lines of a file with multiple values, the rest 
are single and are reading in fine.

With the multiple value lines, python says this "ValueError: too many 
values to unpack"

I've googled it and it says that happens when you have too few or too 
many strings that don't match with the variables in number your trying 
to assign them too.  Below are the lines in reading in:

line 3 - 19.18    29.15    78.75    212.10
line 4 - 100    20    410.29  
And this is the code I'm using:

   #read withdrawls from file on line3
   line = infile.readline()
     #split withdrawls up
   withdraw1, withdraw2, withdraw3, withdraw4 = string.split(line, "\t")

   #read deposits from file on line4
   line = infile.readline()
   #split deposits up
   deposit1, deposit2, deposit3 = string.split(line, "\t")

I have 4 strings to match line 3 and 3 to match the 3 on line 4...any 
thoughts?

thx


From george.sakkis at gmail.com  Sun Sep 30 15:37:36 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: Sun, 30 Sep 2007 19:37:36 -0000
Subject: Can you please give me some advice?
In-Reply-To: <mailman.1317.1191178454.2658.python-list@python.org>
References: <mailman.1300.1191147737.2658.python-list@python.org>
	<13fuv0gh7342r27@corp.supernews.com>
	<1191173228.756531.225860@o80g2000hse.googlegroups.com>
	<mailman.1317.1191178454.2658.python-list@python.org>
Message-ID: <1191181056.529752.16000@w3g2000hsg.googlegroups.com>

On Sep 30, 2:54 pm, Ricardo Ar?oz <ricar... at gmail.com> wrote:
>
> Errhhh..... guys...... I think .kr means Korea.... so he would speak
> Korean, not Chinese

In this case, http://kr.diveintopython.org/html/index.htm might be
more useful ;-)

George



From grante at visi.com  Fri Sep  7 09:17:53 2007
From: grante at visi.com (Grant Edwards)
Date: Fri, 07 Sep 2007 13:17:53 -0000
Subject: py2exe - change name of exe created
References: <1189164934.705547.156670@r34g2000hsd.googlegroups.com>
	<1189165183.727542.47640@19g2000hsx.googlegroups.com>
Message-ID: <13e2js1r7mjql58@corp.supernews.com>

On 2007-09-07, imageguy <imageguy1206 at gmail.com> wrote:

> Note that every thing works fine with this and creates an exe
> program called "myprogram.exe"
>
> I would like to setup program to create an output called;
> "MyBestProgram.exe"
>
> IS that at all possible ?

ADD this to the end of your script:

import os
os.rename('dist/myprogram.exe','dist/MyBestProgram.exe')

-- 
Grant Edwards                   grante             Yow! Zippy's brain cells
                                  at               are straining to bridge
                               visi.com            synapses ...


From george.sakkis at gmail.com  Sat Sep 29 11:19:04 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: Sat, 29 Sep 2007 15:19:04 -0000
Subject: question about for cycle
In-Reply-To: <mailman.1278.1191076522.2658.python-list@python.org>
References: <mailman.1275.1191060311.2658.python-list@python.org>
	<1191073123.459709.98870@g4g2000hsf.googlegroups.com>
	<mailman.1278.1191076522.2658.python-list@python.org>
Message-ID: <1191079144.724699.250470@o80g2000hse.googlegroups.com>

On Sep 29, 10:34 am, "fdu.xia... at gmail.com" <fdu.xia... at gmail.com>
wrote:
> tokl... at gmail.com wrote:
>
>  > On 29 sep, 12:04, "fdu.xia... at gmail.com" <fdu.xia... at gmail.com> wrote:
>  >
>  >> for i in generator_a:  # the first "for" cycle
>  >>      for j in generator_b:
>  >>          if something_happen:
>  >>              # do something here ..., I want the outer cycle to break
>  >>              break
>  >
>  > Do you like this?
>  >
>  > generator_ab = ((x, y) for x in generator_a for y in generator_b)
>  > for i, j in generator_ab:
>  >     if condition:
>  >         # do something
>  >         break
>  >
>   In this case, the tuple generator_ab must be generated first.

It's not a tuple, it is a generator expression that can generate
tuples *lazily*.

> Sometime it maybe a waste to generate all possible combinations of i,j first.

It doesn't; read about generator expressions at http://www.python.org/dev/peps/pep-0289/

George



From llothar at web.de  Sat Sep  1 09:42:53 2007
From: llothar at web.de (llothar)
Date: Sat, 01 Sep 2007 06:42:53 -0700
Subject: How to find out if the interpreter is a debug build?
In-Reply-To: <46d95d5a$0$9015$9b622d9e@news.freenet.de>
References: <1188609417.273513.74450@i13g2000prf.googlegroups.com>
	<46d905d5$0$26151$9b622d9e@news.freenet.de>
	<1188643450.431001.219220@o80g2000hse.googlegroups.com>
	<46d95d5a$0$9015$9b622d9e@news.freenet.de>
Message-ID: <1188654173.615402.190960@19g2000hsx.googlegroups.com>

>
> Would you like to contribute a patch?

Would such a patch require a full blown PEP?

If i have to write a PEP i can better add it to the documentation of
my application and be sure that the problem is solved. A patch might
be rejected by anybody in a bad mood or who don't understand why it is
usefull.



From samir.vds at googlemail.com  Sat Sep 15 18:13:54 2007
From: samir.vds at googlemail.com (samir.vds at googlemail.com)
Date: Sat, 15 Sep 2007 15:13:54 -0700
Subject: problems using pythom tempfile module
In-Reply-To: <1189891458.583774.171030@22g2000hsm.googlegroups.com>
References: <1189890699.807384.258580@o80g2000hse.googlegroups.com>
	<1189891458.583774.171030@22g2000hsm.googlegroups.com>
Message-ID: <1189894434.135052.283420@w3g2000hsg.googlegroups.com>

On Sep 15, 5:24 pm, buffi <bjorn.kem... at gmail.com> wrote:
> On Sep 15, 11:11 pm, "samir.... at googlemail.com"
>
>
>
> <samir.... at googlemail.com> wrote:
> > Hello everyone,
>
> > I'm trying to test the tempfile module with the following script,
> > which basically creates a temporary file, fills the file with some
> > test data and prints it.
>
> > import tempfile
>
> > t = tempfile.TemporaryFile()
> > t.write("lalalala")
> > t.flush()
> > print t.read()
>
> > Unfortunately, the print statement gives me an empty string. Can
> > somebody tell me what I'm doing wrong ?
>
> > regards Samir
>
> Do a t.seek(0) before you do the read to "rewind" the file and then it
> should work.

Ok, this really worked. Can you elaborate why I have to insert this
statement?



From jcd at sdf.lonestar.org  Sun Sep 16 13:50:56 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Sun, 16 Sep 2007 13:50:56 -0400
Subject: SVG to raster conversion.
In-Reply-To: <46ED61E6.9010500@web.de>
References: <mailman.613.1189958286.2658.python-list@python.org>
	<46ED61E6.9010500@web.de>
Message-ID: <46ED6D00.9000806@sdf.lonestar.org>

Stefan Behnel wrote:
> J. Cliff Dyer wrote:
>   
>> Does anybody know a good solution (preferably in python) for rasterizing
>> SVG or other vector graphics.
>>
>> I'm thinking something like
>>
>> vector_image = SVGFile(path_to_image)
>> raster_image = vector_image.rasterize(format, (width, height), dpi)
>> raster_image.write(out_file)
>>
>> Thanks for any pointers you might have.
>>     
>
> The GIMP can do it, and you can even program it in Python.
>
> Stefan
>   
Thanks.  I can't find a gimp-python package for gimp-2.x anywhere
though.  Do
es such a thing exist?


From laurent.pointal at limsi.fr  Mon Sep 24 10:21:52 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Mon, 24 Sep 2007 16:21:52 +0200
Subject: Converting numbers to unicode charaters
In-Reply-To: <1190641342.127770.115610@y42g2000hsy.googlegroups.com>
References: <1190641342.127770.115610@y42g2000hsy.googlegroups.com>
Message-ID: <fd8h60$6p5$1@news2.u-psud.fr>

byte8bits at gmail.com a ?crit :
> Here's how I'm doing this right now, It's a bit slow. I've just got
> the code working. I was wondering if there is a more efficient way of
> doing this... simple example from interactive Python:
> 
>>>> word = ''
>>>> hexs = ['42', '72', '61', '64']
>>>> for h in hexs:
> ...   char = unichr(int(h, 16))
> ...   word += char
> ...   print char
> ...
> B
> r
> a
> d
>>>> print word
> Brad
> 
> 
> Each hex_number is two digits. unichr converts that to a character
> that I append to previous ints that have been converted to chars. In
> this way, I convert a string of hex numbers to ints to letters, to
> words.
> 
> Perhaps I'm doing it wrong... any tips?

You have to go by int conversion to get codes, and by unichr to get 
corresponding unicode chars, so this seem the solution.

You may eventually use a more condensed expression and avoid n 
concatenation of n chars using join, like this:

 >>> u''.join(unichr(int(x,16)) for x in ['42','72','61','64'])
u'Brad'



From cai.haibin at gmail.com  Tue Sep 25 22:55:17 2007
From: cai.haibin at gmail.com (james_027)
Date: Wed, 26 Sep 2007 02:55:17 -0000
Subject: %s shortcut?
Message-ID: <1190775317.062210.234400@g4g2000hsf.googlegroups.com>

hi i have something like this

cursor.execute("""
            select c.name,
                (select from ap_invoice i where Month(i.date) = 1 and
Year(i.date) = %s and i.customer_id = c.id and i.status != 'CAN') jan,
                (select from ap_invoice i where Month(i.date) = 2 and
Year(i.date) = %s and i.customer_id = c.id and i.status != 'CAN') feb,
                (select from ap_invoice i where Month(i.date) = 3 and
Year(i.date) = %s and i.customer_id = c.id and i.status != 'CAN') mar
            from ap_customer c
            order by %s""",
            [year, order_by])

what I could like to happen is ... since the first three %s points to
the same year variable, how do I let python know it without doing
[year ,year, year, order_by] ... This should be 12 I just cut it down

Thanks
james



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Sep 28 04:04:04 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 28 Sep 2007 10:04:04 +0200
Subject: A question on python performance.
In-Reply-To: <mailman.1191.1190930173.2658.python-list@python.org>
References: <mailman.1191.1190930173.2658.python-list@python.org>
Message-ID: <46fcb549$0$9487$426a74cc@news.free.fr>

Joe Goldthwaite a ?crit :
(snip)

>  I guess I still think of decorators as the people
> who got the gym ready for the prom.  I've tried getting up to speed on
> decorators but I haven't had much success.

The @decorator syntax is just syntactic sugar for a common use of higher 
order functions. So to understand decorators, you first need understand 
the concepts of higher order functions and closures. Both are documented 
  in many places on the web.

> Bruno Desthuilliers wrote:
> 
>> IOW, direct access to obj.__class__.__dict__ bypasses both inheritence
>> and per-instance overriding.
> 
> Thanks for your response also Bruno. I don't understand the code you
> posted well enough yet to even ask a useful question. There are a number
> of things I haven't seen before.

It's very 101 python code, apart from this line :
   c2.dothis = dothat.__get__(c2, type(c2))

which is a way to dynamically attach a function as method to an 
instance, directly invoking the descriptor protocol (it's documented on 
python.org)

FWIW, it's most often done using the 'new' module, and possibly less 
confusing:

import new
c2.dothis = new.instancemethod(dothat, c2, type(c2))

> Now I really feel like a newbie!

My fault - this example wasn't that necessary, the main point was wrt/ 
direct access to instance.__class__.__dict__ bypassing normal attribute 
lookup rules so inherited attributes are not resolved...

> I'm working on it though so I may have some questions later.

You're welcome.



From bdesth.quelquechose at free.quelquepart.fr  Sat Sep 29 13:17:43 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 29 Sep 2007 19:17:43 +0200
Subject: Can you please give me some advice?
In-Reply-To: <1191173228.756531.225860@o80g2000hse.googlegroups.com>
References: <mailman.1300.1191147737.2658.python-list@python.org>
	<13fuv0gh7342r27@corp.supernews.com>
	<1191173228.756531.225860@o80g2000hse.googlegroups.com>
Message-ID: <46fffb38$0$30242$426a74cc@news.free.fr>

cmpython at gmail.com a ?crit :
(snip)
> I know nothing of Ruby, but just the fact that in Ruby the Hello World
> program is
> 
> puts 'Hello, World!'
> 
> whereas the Python Hello World program is
> 
> print 'Hello, World!'
> 
> suggests to me that Python is more intuitive because the word "print"
> has a meaning in English that makes sense given what you want to do,
> but "puts" just doesn't.

Hem.... Sorry, but it reminds me of the most clueless comments on Python 
I've seen on c.l.ruby. I really don't think Python is more or less 
"intuitive" than Ruby, and making a judgement on such a pointless detail 
is not even worth the bandswith IMHO. FWIW, 'puts' means 'put string' 
(implied : on stdout), which is certainly much more semantically correct 
than what 'print' implies. When stdout is redirected to a socket that 
send bytes to a client program - like, say, a browser -, you're 
certainly not "printing" anything.

Anyway, at this level, Python and Ruby are surprisingly close to each 
other.

>  And, as someone who has been learning Python
> from almost no knowledge of programming, I've found it is not too bad
> in trying to keep as reasonably close to a natural language like
> English
> as possible.

Here again, Ruby claims (or at least some rubyists do) that Ruby is as 
close as possible to "natural language". With examples like:

5.times do {
    something
    and_something_else
}

which is arguably more "intuitive" than:

for i in range(5):
   do_something()
   and_something_else()


> I also think the mandatory indenting of Python is helpful in forcing
> new programmers to be neat and see code blocks quickly.  Plus I doubt
> the Ruby community has such a large group of helpful people

While perhaps smaller, the Ruby community is (AFAICT) known for being 
very active and helpful.

> and
> libraries
> and such (but I could be wrong about that, just assuming it based on
> the
> fact that Python has been around longer).

On this last point at least, you're probably right !-)

> On the other hand, perhaps because Ruby is newer it has been able to
> freshly start with advantages learned from the difficulties of other
> languages.   Byung-Hee Hwang ought to go the Ruby group and see what
> they are saying.

Indeed. Or even better, try both languages and find out which one he 
likes best. Implementation and 3rd part libs set aside, I could not say 
one is better than the other, so it's mostly a matter of personal taste 
and affinities.

> As far as English goes, Byung-Hee, you have to admit English grammar
> is easy

Would you say French is easy ? Because as far as I'm concerned, I find 
it the easiest language ever. Could it be because I'm french ?-)

(snip)


From bignose+hates-spam at benfinney.id.au  Tue Sep 18 01:48:09 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 18 Sep 2007 15:48:09 +1000
Subject: The meaning of  a = b  in object oriented languages
References: <1190094057.976729.285120@n39g2000hsh.googlegroups.com>
Message-ID: <87myvkzfqe.fsf@benfinney.id.au>

Summercool <Summercoolness at gmail.com> writes:

> I just want to confirm that in OOP, if a is an object, then b = a is
> only copying the reference.

Whether the language is OO or not has no bearing on this question. The
semantics of the assignment operator can and do differ between
languages, orthogonal to whether OOP is involved.

-- 
 \     "Our task must be to free ourselves from our prison by widening |
  `\    our circle of compassion to embrace all humanity and the whole |
_o__)                       of nature in its beauty." ?Albert Einstein |
Ben Finney


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Sep 24 11:32:58 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 24 Sep 2007 17:32:58 +0200
Subject: Can a base class know if a method has been overridden?
In-Reply-To: <1190647436.423328.217670@w3g2000hsg.googlegroups.com>
References: <1190647436.423328.217670@w3g2000hsg.googlegroups.com>
Message-ID: <46f7d897$0$25150$426a74cc@news.free.fr>

Ratko a ?crit :
> Hi all,
> 
> I was wondering if something like this is possible. Can a base class
> somehow know if a certain method has been overridden by the subclass?

If your use case is to make sure a given ('abstract') method has been 
overriden, the canonical solution is to raise NotImplementedError in the 
base class's implementation, ie:


class Parent(object):
   def method(self):
     raise NotImplementedError

class GoodGirl(Parent):
   def method(self):
     print "I'm a good girl"

class BadBoy(Parent):
   pass


Else, this may be possible using a custom metaclass (or possibly just 
specializing the __new__ method), but there may be better solutions 
(depending on what you're really trying to do)..

HTH


From Unbekannt.Beispiel at googlemail.com  Thu Sep 13 14:22:39 2007
From: Unbekannt.Beispiel at googlemail.com (Iwan)
Date: Thu, 13 Sep 2007 11:22:39 -0700
Subject: awrkawrprpkar
Message-ID: <1189707759.601153.212610@22g2000hsm.googlegroups.com>

http://www.martin-stosch-superstar.wg.am/



From steve at holdenweb.com  Tue Sep 25 08:17:01 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 25 Sep 2007 08:17:01 -0400
Subject: An Editor that Skips to the End of a Def
In-Reply-To: <5ls313F9ndm1U1@mid.individual.net>
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>	<87odfxjn16.fsf@rudin.co.uk>	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>	<87hclpjm3a.fsf@rudin.co.uk>
	<fd0au1$fro$1@lust.ihug.co.nz>	<5lhs4pF8bkunU1@mid.individual.net>
	<fd4168$ige$1@lust.ihug.co.nz>	<slrnfff9op.1is.horpner@FIAD06.norwich.edu>	<fd9ncb$q3l$1@lust.ihug.co.nz>
	<5ls313F9ndm1U1@mid.individual.net>
Message-ID: <46F8FC3D.6050700@holdenweb.com>

Bjoern Schliessmann wrote:
> Lawrence D'Oliveiro wrote:
>> That's like saying, about a program that, when given "2 + 2",
>> outputs "5", that _of course_ it knows the correct answer is "4",
>> it just chooses to "modify" the answer before outputting it.
> 
> No. Which laws say how transitions between modes have to be? Thus, I
> know laws saying 2 and 2 is 4.
>  
>> Why does it "choose" to modify your position when you exit insert
>> mode? Does the phrase "broken as designed" mean anything to you?
> 
> Does the phrase "everything I don't like is stupid" mean anything to
> you? Honestly, if you don't like it, either propose improvement or
> stop using it (and complaining about it). Your preference with user
> interfaces is obviously different. (Personally, I prefer single
> strokes to breaking my fingers with Esc-Meta-Alt-Control-Shift.
> :) )
>  
Does "this non-Python related twaddle is boring the shit out of me" mean 
anything to you both?

[...]

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From arnau at ehas.org  Sun Sep  9 15:40:45 2007
From: arnau at ehas.org (Arnau Sanchez)
Date: Sun, 09 Sep 2007 21:40:45 +0200
Subject: Modul (%) in python not like in C?
In-Reply-To: <46E4466C.2030303@sdf.lonestar.org>
References: <880dece00709091201n449d4c2k31998a5d426de17d@mail.gmail.com>
	<46E4466C.2030303@sdf.lonestar.org>
Message-ID: <46E44C3D.4050308@ehas.org>

J. Cliff Dyer escribi?:

> Dotan Cohen wrote:

>> FIrst of all, how is the % symbol (as in 70%6=4) called in English?
>>
>> Second, in Turbo C -111%10=-1 however in python -111%10=9. Is one or
>> the other in error? Is this a known gotcha? I tried to google the
>> subject however one cannot google the symbol %. Thanks in advance.
>>
>> Dotan Cohen
>>   
> 
> The % operator is called "modulo" in English.  I don't think the 
> difference in implementation is an error.  It's just a difference of 
> calculation method. 
> 
> Python will always yield a number x = m%n such that 0 <= x < n, but 
> Turbo C will always yield a number such that if x = m%n -x = -m%n.  That 
> is, since 111 % 10 = 1, -111 % 10 = -1.  The two values will always 
> differ by n (as used above). 

In fact, what you get in C depends on the compiler and architecture, while 
Python is always consistent and returns positive remainders.

More info:

http://www.python.org/doc/faq/programming/#why-does-22-10-return-3

http://groups.google.com/group/comp.lang.python/search?group=comp.lang.python&q=modulo+negative+C



From jstroud at mbi.ucla.edu  Wed Sep  5 14:17:52 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 05 Sep 2007 11:17:52 -0700
Subject: concise code (beginner)
In-Reply-To: <13dsvqrqivtf092@corp.supernews.com>
References: <13dsvqrqivtf092@corp.supernews.com>
Message-ID: <fbmrsg$dsi$1@daisy.noc.ucla.edu>

bambam wrote:
> I have about 30 pages (10 * 3 pages each) of code like this
> (following). Can anyone suggest a more compact way to
> code the exception handling? If there is an exception, I need
> to continue the loop, and continue the list.
> 
> Steve.
> 
> -----------------------------------
> for dev in devs
>     try:
>         dev.read1()
>     except
>         print exception
>         remove dev from devs
> 
> for dev in devs
>     try:
>         dev.read2()
[etc.]

My keen sense of pattern recognition tells me that all of your read's 
follow the same naming pattern--or was that just an accidental naming 
coincidence on your part for the sake of example?


for i in xrange(number_of_reads):
   for dev in devs:
     try:
       _reader = getattr(dev, 'read%d' % i)
       _reader()
     except Exception, e:
       print e
       devs.remove(dev)

James

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

http://www.jamesstroud.com/


From arkanes at gmail.com  Wed Sep 12 11:34:48 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 12 Sep 2007 10:34:48 -0500
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <1189608231.151112.147550@y42g2000hsy.googlegroups.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189604018.520338.162520@57g2000hsv.googlegroups.com>
	<46e7f450$0$12305$426a74cc@news.free.fr>
	<1189608231.151112.147550@y42g2000hsy.googlegroups.com>
Message-ID: <4866bea60709120834t63e606c5g9fc63396b12e753@mail.gmail.com>

On 9/12/07, Charles Fox <charles.fox at gmail.com> wrote:
> Thanks guys -- yeah these two stategies (short s.varname; and explicit
> rescoping, a=self.a etc) are more or less what I was using.  That's
> still kind of annoying though.
>
> The s.varname approach still makes numerical code much harder to read.
>
> I had a nasty bug with the boilerplate approach when forgetting to
> reassign some of the variables back to members (self.a=a).  And that's
> a lot of boilerplate you need -- I thought the python way was to
> minimize redundant code?  (Ditching header files and curley brackets
> was a main reason for me coming here).
>
> I see the argument for making self explicit -- what would be wrong
> with just .a instead of self.a though?  That's still explicit but much
> easier to read.  (I think I've seen that somewhere else, is it C#?)
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


This is terrible and horrible, please don't use it. That said,
presenting the magic implicit_self context manager!

from __future__ import with_statement
import sys

class implicit_self(object):
    def __init__(self, obj):
        self.obj = obj
    def __enter__(self):
        local = sys._getframe(1).f_locals
        local.update(self.obj.__dict__)
    def __exit__(self, exc, obj, tb):
        local = sys._getframe(1).f_locals
        for k in self.obj.__dict__:
            setattr(self.obj, k, local[k])

if __name__ == '__main__':
    class Test(object):
        pass
    t = Test()
    t.a = 10
    t.b = 20
    with implicit_self(t):
        print a
        print b
        a = 40
        b = a * 2

    print t.a
    print t.b


From robin at reportlab.com  Mon Sep 17 09:16:34 2007
From: robin at reportlab.com (Robin Becker)
Date: Mon, 17 Sep 2007 14:16:34 +0100
Subject: Python 3K or Python 2.9?
In-Reply-To: <1189573098.290501.72630@50g2000hsm.googlegroups.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>	<7x7imwpn1u.fsf@ruckus.brouhaha.com>	<87abrs7c6v.fsf@benfinney.id.au>
	<1189573098.290501.72630@50g2000hsm.googlegroups.com>
Message-ID: <46EE7E32.7090506@chamonix.reportlab.co.uk>

Graham Dumpleton wrote:
>.......
> In that blog, Guido says:
> 
> """Concurrency: It seems we're now happily out exploring here. I'm
> looking forward to benchmarks showing that PP or similar (or
> dissimilar!) solutions actually provide a performance gain. Another
> route I'd like to see explored is integrating one such solution into
> an existing web framework (or perhaps as WSGI middleware) so that web
> applications have an easy way out without redesigning their
> architecture."""
.......

Well I have been trying out a system very like PP. For various reasons I prefer 
to write my own scheduler based on more traditional code, but it's very easy to 
get SSH based workers going. Agreed it's a noddy system, but I find the 
following timings for the pp callback demo with start=1, end=200000000.

All the workers are similar to a pp local worker, but some are controlled via 
ssh and hence have to be initialised by an argument like -c"exec input()" which 
downloads some bootstrap code; I find that an easy way to utilize a server which 
already has ssh.

The local workers are clearly dominant, but even though app1,app3,app4 are not 
in the same country they can still be used to provide useful work.

I suspect most people won't want to use  either ssh or socket based workers when 
64 cpu machines arrive. The worker farm topology is also a bit wrong for 
massively parallel stuff.

################################################################
Starting scheduler with 1 workers(1 local)
Partial sum is 0.69314718306 | diff = -2.50006693125e-009
Job execution statistics:
  job count | % of all jobs | job time sum | time per job | worker
        128 |        100.00 |      59.7190 |     0.466555 | local:3676
        128 |        100.00 |      59.7190 |     0.466555 | all local
        128 |        100.00 |      59.7190 |     0.466555 | total
Time elapsed since scheduler creation 59.7820000648
Real average time 0.467046875507


Starting scheduler with 2 workers(2 local)
Partial sum is 0.69314718306 | diff = -2.50006693125e-009
Job execution statistics:
  job count | % of all jobs | job time sum | time per job | worker
         64 |         50.00 |      31.5300 |     0.492656 | local:324
         64 |         50.00 |      31.2190 |     0.487797 | local:3684
        128 |        100.00 |      62.7490 |     0.490227 | all local
        128 |        100.00 |      62.7490 |     0.490227 | total
Time elapsed since scheduler creation 31.5460000038
Real average time 0.24645312503


Starting scheduler with 3 workers(2 local)
Partial sum is 0.69314718306 | diff = -2.50006704228e-009
Job execution statistics:
  job count | % of all jobs | job time sum | time per job | worker
         53 |         41.41 |      25.6580 |     0.484113 | local:2392
         52 |         40.63 |      25.5150 |     0.490673 | local:416
         23 |         17.97 |      24.2500 |     1.054348 | ssh:RLUK_robin:20457
        105 |         82.03 |      51.1730 |     0.487362 | all local
        128 |        100.00 |      75.4230 |     0.589242 | total
Time elapsed since scheduler creation 25.7349998951
Real average time 0.20105468668


Starting scheduler with 4 workers(2 local)
Partial sum is 0.69314718306 | diff = -2.50006704228e-009
Job execution statistics:
  job count | % of all jobs | job time sum | time per job | worker
         46 |         35.94 |      22.2200 |     0.483043 | local:2328
         46 |         35.94 |      22.4670 |     0.488413 | local:3580
         21 |         16.41 |      22.3150 |     1.062619 | ssh:RLUK_robin:20500
         15 |         11.72 |      21.9730 |     1.464867 | ssh:app1:3549
         92 |         71.88 |      44.6870 |     0.485728 | all local
        128 |        100.00 |      88.9750 |     0.695117 | total
Time elapsed since scheduler creation 23.0320000648
Real average time 0.179937500507

Starting scheduler with 5 workers(2 local)
Partial sum is 0.69314718306 | diff = -2.50006704228e-009
Job execution statistics:
  job count | % of all jobs | job time sum | time per job | worker
         40 |         31.25 |      19.3600 |     0.484000 | local:1376
         41 |         32.03 |      19.7030 |     0.480561 | local:3608
         18 |         14.06 |      19.1090 |     1.061611 | ssh:RLUK_robin:20524
         14 |         10.94 |      19.1110 |     1.365071 | ssh:app1:3596
         15 |         11.72 |      19.0950 |     1.273000 | ssh:app3:44316
         81 |         63.28 |      39.0630 |     0.482259 | all local
        128 |        100.00 |      96.3780 |     0.752953 | total
Time elapsed since server creation 19.9850001335
Real average time 0.156132813543

Starting scheduler with 7 workers(2 local)
Partial sum is 0.69314718306 | diff = -2.50006693125e-009
Job execution statistics:
  job count | % of all jobs | job time sum | time per job | worker
         31 |         24.22 |      14.9540 |     0.482387 | local:2588
         31 |         24.22 |      15.0630 |     0.485903 | local:472
         13 |         10.16 |      14.0790 |     1.083000 | ssh:RLUK_robin:20548
          9 |          7.03 |      14.7680 |     1.640889 | ssh:app1:3626
         11 |          8.59 |      14.3260 |     1.302364 | ssh:app3:44344
         15 |         11.72 |      14.2990 |     0.953267 | ssh:app4:61396
         18 |         14.06 |      14.4050 |     0.800278 | ssh:app5:1258
         62 |         48.44 |      30.0170 |     0.484145 | all local
        128 |        100.00 |     101.8940 |     0.796047 | total
Time elapsed since scheduler creation 15.2030000687
Real average time 0.118773438036
################################################################
-- 
Robin Becker



From nagle at animats.com  Mon Sep 17 19:29:40 2007
From: nagle at animats.com (John Nagle)
Date: Mon, 17 Sep 2007 16:29:40 -0700
Subject: ANN: M2Crypto 0.18
In-Reply-To: <ocGdnXUJH8pyqzfbnZ2dnUVZ_rOdnZ2d@comcast.com>
References: <ocGdnXUJH8pyqzfbnZ2dnUVZ_rOdnZ2d@comcast.com>
Message-ID: <vVDHi.4705$7P7.766@newssvr19.news.prodigy.net>

Heikki Toivonen wrote:
> M2Crypto is the most complete Python wrapper for OpenSSL featuring RSA,
> DSA, DH, HMACs, message digests, symmetric ciphers (including AES); SSL
> functionality to implement clients and servers; HTTPS extensions to
> Python's httplib, urllib, and xmlrpclib; unforgeable HMAC'ing
> AuthCookies for web session management; FTP/TLS client and server;
> S/MIME; ZServerSSL: A HTTPS server for Zope and ZSmime: An S/MIME
> messenger for Zope.
> 
> Download links on the homepage at
> http://chandlerproject.org/Projects/MeTooCrypto.

    Is there a Windows binary for M2Crypto 0.18 yet?

						John Nagle


From bert at bertisevil.tv  Fri Sep  7 11:28:09 2007
From: bert at bertisevil.tv (Evil Bert)
Date: Fri, 07 Sep 2007 15:28:09 GMT
Subject: interesting puzzle......try this you will be rewarded...
In-Reply-To: <mailman.214.1189160840.2658.python-list@python.org>
References: <mailman.214.1189160840.2658.python-list@python.org>
Message-ID: <d6eEi.14181$3x.11948@newssvr25.news.prodigy.net>

Andreas Tawn wrote:
> Maybe http://www.pythonchallenge.com/ ?

Fun!  Thanks!


From pavlovevidence at gmail.com  Sat Sep  1 22:28:33 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sat, 1 Sep 2007 22:28:33 -0400
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<1188523589.736146.263510@l22g2000prc.googlegroups.com>
	<1i3o9kr.2gmni61g62moaN%aleax@mac.com>
	<7xwsvcc9yz.fsf@ruckus.brouhaha.com>
	<1i3p8lm.19738kn1q0gkouN%aleax@mac.com>
	<1188587846.687895.69240@q5g2000prf.googlegroups.com>
	<38rmq4-cq.ln1@strongwill.g2ctech>
	<46d903db$0$19580$4c368faf@roadrunner.com>
	<gjvnq4-a45.ln1@strongwill.g2ctech>
Message-ID: <46da2b31$0$6412$4c368faf@roadrunner.com>

On Sat, 01 Sep 2007 08:38:38 -0300, Jorge Godoy wrote:

> Carl Banks wrote:
> 
>> This is starting to sound silly, people.  Critical is a relative term,
>> and one project's critical may be anothers mundane.  Sure a flaw in
>> your flagship product is a critical problem *for your company*, but are
>> you really trying to say that the criticalness of a bad web search is
>> even comparable to the most important systems on airplanes, nuclear
>> reactors, dams, and so on?  Come on.
> 
> Who said they were the same? 

The word I used was "comparable".

> I said that just because it doesn't take
> lives it doesn't mean it isn't important.  I wasn't going to reply to
> not extend this, but this misunderstanding of your was bugging me.

Well, I wasn't talking about "importance", actually.  Importance is 
really a matter for sociologists.  Perhaps you can find a sociologist who 
would agree that a health monitoring system is more important than an 
aircraft control system (probably wouldn't be too hard, actually, 
especially if it's a military aircraft).  I could hardly argue with that.

But, frankly, importance to society is only a small part of what 
determines criticalness of the application; and criticalness is what 
factors into a decision on what programming language to use.  Here are 
some of the main factors that determine criticalness:

How much time is there between failure and catastrophe?  What is the cost 
(societal and/or economic) of a catastrophe?  How recoverable is a 
failure?  What is the degree of difficulty of the programming?  Do small 
errors accumulate?  How many government regulations does the code have to 
meet?  What is the acceptable failure rate before an application is 
allowed to deploy?  How much money is being spent to ensure flawless 
operation before it even deploys?

By these criteria, Google web search, your health monitoring system, a 
bank transaction system, etc., hardly compare to something like aircraft 
control.  I'm sorry.


> I use Python on systems that deal with human health and wrong
> calculations may have severe impact on a good sized population.  Using
> Python.

Cool. Not that, by itself, would be enough to make me feel good about 
Python on airplanes.


> As with nuclear reactors, dams, airplanes and so on we have a lot of
> redundancy and a lot of checkpoints.  No one is crazy to take them out
> or even to remove some kind of dispositive to allow manual intervention
> at critical points.

Really?  I must work with crazy people then, because we are working on a 
full authority control system: no bypassing the computer, no manual 
intervention.


Carl Banks


From mblume at socha.net  Fri Sep 14 12:20:12 2007
From: mblume at socha.net (Martin Blume)
Date: Fri, 14 Sep 2007 18:20:12 +0200
Subject: where is help file?
References: <13el4vvna6jildc@corp.supernews.com>
	<mailman.539.1189779786.2658.python-list@python.org>
Message-ID: <46eab4bc$0$3811$5402220f@news.sunrise.ch>

"Carsten Haese" schrieb
> > new to Fedora7, typed python in interactive interpreter, then
help().
> > Then modules to get a list of modules.  Then module name to get
info
> > on a module but no help file.  What is the help file name?
> > Is there an environmental variable I have to set?
>
> There is no help file, and no environment variable. The help text
is
> stored directly inside each module and function that supplies a
help
> text. Observe:
>
> >>> def f(x):
> ...   "Calculate the square of x."
> ...   return x**x
> ...
> >>> help(f)
> Help on function f in module __main__:
>
> f(x)
>     Calculate the square of x.
> (END)
>
> Providing such a help text is optional, but all standard library
modules
> do provide help as far as I know. Consequently, the fact that you
have a
> module that doesn't provide a help text seems to indicate that
it's not
> a standard library module. What's the name of the module you're
trying
> to get help on?
>
> Hope this helps (no pun intended),
>
AFAIK you have to import the module first, before you can get help
on that module.

HTH
Martin



From rrr at ronadam.com  Sun Sep 23 04:55:45 2007
From: rrr at ronadam.com (Ron Adam)
Date: Sun, 23 Sep 2007 03:55:45 -0500
Subject: Factory function with keyword arguments
In-Reply-To: <13fbl9ertj5es12@corp.supernews.com>
References: <13fbl9ertj5es12@corp.supernews.com>
Message-ID: <46F62A11.7010002@ronadam.com>



Steven D'Aprano wrote:
> I'm writing a factory function that needs to use keywords in the produced 
> function, not the factory. Here's a toy example:


> I thought of doing this:
> 
> def factory(flag):
>     if flag: kw = 'spam'
>     else: kw = 'ham'
>     def foo(obj, arg):
>         kwargs = dict([(kw, arg)])
>         return obj.method(**kwargs)
>     return foo
> 
> Is this the best way of doing this? Are there any alternative methods 
> that aren't risky, slow or obfuscated?

Looks ok to me.  It can be simplified a bit.

    def factory(flag):
        kw = 'spam' if flag else 'ham'
        def foo(obj, arg):
            return obj.method(**{kw:arg})
        return foo


Cheers,
    Ron


From paul at boddie.org.uk  Fri Sep  7 08:10:37 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Fri, 07 Sep 2007 05:10:37 -0700
Subject: Any syntactic cleanup likely for Py3? And what about doc
	standards?
In-Reply-To: <1189138766.283313.113690@50g2000hsm.googlegroups.com>
References: <mailman.108.1189018988.2658.python-list@python.org>
	<1189076186.590996.190380@o80g2000hse.googlegroups.com>
	<1189138766.283313.113690@50g2000hsm.googlegroups.com>
Message-ID: <1189167037.704759.174420@19g2000hsx.googlegroups.com>

On 7 Sep, 06:19, Kay Schluehr <kay.schlu... at gmx.net> wrote:
> On Sep 6, 12:56 pm, Paul Boddie <p... at boddie.org.uk> wrote:
>
> > I think there's been a widespread "kitchen sink" mentality around the
> > Python language for some time, which is where the multimethods
> > proposal, amongst others, fits in here.
>
> Maybe that's one of two fixed points in the evolution of a programming
> language? The other one might be an almost non-designed and small
> language with a vast and flat library a la PHP and Zend. Apparently
> even Scheme moves into the kitchen sink today with the new R6RS
> specification.

My impression of PHP (before version 5), derived from anecdotes and
general criticism, is that both the language and the most promoted
libraries have accumulated features without much regard to how the end-
user experience works out. In contrast, it is said that Python has
been improved with more attention to the end-user experience (albeit
with limitations related to the main implementation and backwards
compatibility), with Python 3000 being the pinnacle of this user-
centric process. Regardless of whether Python 3000 really tidies up
the experience, it is notable that the promotional value of the
standard library has diminished, perhaps because the core developers
no longer feel that the language attracts embarrassing criticism which
is best answered by deflecting the critic to standard library
solutions.

> Python is going to be the-right-thing with abandoning the print
> statement or making lists a bit more monotyped with a type aware sort.
> The worse-is-better philosophy on the other hand is  indifferent
> towards stylistic consistency and equipped with less nominalistic
> pedantry ( "this is a list and therefore you only have to use it as a
> list and not as a multiset..." ).

I think you've swum into the philosophical "deep end" on this
point. ;-) But of the different articles on the PythonWarts page I
mentioned, Mertz's criticisms (which include notes on sorting
heterogeneous collections) are certainly worth reading, partly because
they do highlight awkward-to-address end-user expectations whilst
being fairly modern criticisms. That's not to say that I agree with
everything he writes, although I have some sympathy with his opinions
on iterators vs. sequences and the current level of convenience in
this area.

> This explains also the lack of interest into the std library which
> will be reduced to CPython services and basic datatypes. But there are
> also organizational issues and I don't even think that a lib that
> provides applications and domain specific services has to be
> necessarily maintained and approved by python-dev. I'd go even further
> and contend that's one of the issues where a rather large community
> such as Pythons could grow up and set code review standards ( and I
> mean *manual* code reviews of conscientous readers. I don't mean
> cheesecake or up(down)moddings in Web 2.0 style, implementing the
> "wisdom of the crowd" ). I can even live with Eggs and a not-so-common
> code base but not with low quality.

Once upon a time I wrote some thoughts down about marketing Python
where one considers a number of things as the "product" or "solution".
Certainly, in earlier times, adding stuff to the standard library was
a way of positioning Python as a solution to problems in particular
domains: if you needed to write a mail client, for example, Python
provided a working solution as standard that would potentially be
enough to persuade people to use Python for such a project. The belief
that modules should be included in the standard library is a
continuation of this "positioning" or advocacy-related sentiment, as
well as being an issue of convenience, of course.

As technical issues start to encourage other models for providing
solutions based on Python, one has to consider the social aspects of
such models. Where something in the standard library should have an
implicit stamp of approval, although opinions are divided on whether
some modules deserve their place, other models need to support notions
of approval, credibility, quality, and so on. And there we have
different approaches: repositories (optionally with rankings, noticing
that Ubuntu seems to be adding support for such things),
megaframeworks (where people effectively recommend a combination of
solutions), "heavy" distributions (with a selection of popular
packages in an enlarged standard library).

In my opinion, such wider work on promoting Python's usability is
possibly more beneficial to both potential and existing elements of
the community than merely polishing the language and hoping that
people are motivated to write great code because of the increased
elegance.

Paul



From x_john at timney.eclipse.co.uk  Tue Sep 11 10:33:19 2007
From: x_john at timney.eclipse.co.uk (John Timney (MVP))
Date: Tue, 11 Sep 2007 15:33:19 +0100
Subject: Car-ac-systems
References: <1189511932.371621.112970@o80g2000hse.googlegroups.com>
	<BeqdnaFrktIgBHvbnZ2dnUVZ8v-dnZ2d@eclipse.net.uk>
	<YaadnYyTWsmTAnvbnZ2dnUVZ_iydnZ2d@comcast.com>
Message-ID: <cd6dnW0Vf8-wOnvbRVnyhwA@eclipse.net.uk>

Thats all it is.  It may have been a usefully intended resource once, but 
they have no controls whatsoever.  Its time someone closed it down.

Regards

John Timney (MVP)
http://www.johntimney.com
http://www.johntimney.com/blog


"Lew" <lew at lewscanon.com> wrote in message 
news:YaadnYyTWsmTAnvbnZ2dnUVZ_iydnZ2d at comcast.com...
> John Timney (MVP) wrote:
>> How do I control one with C# then!  Thats not on your site, clearly not 
>> everything I need to know then.  Waste of a site!
>
> Please do not top post.
>
>> "knjaz" <knjaz0 at gmail.com> wrote in message
>>> Here you can find everything you need to know about car air
>>> conditioning
>>>
>>> http://car-ac-systems.blogspot.spam/
>
> I'm starting to see "blogspot" as a synonym for "spam".
>
> -- 
> Lew 




From fredrik at pythonware.com  Wed Sep 26 04:53:48 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 26 Sep 2007 10:53:48 +0200
Subject: Pyrex installation on windows XP: step-by-step guide
In-Reply-To: <000501c7ff06$4939cd40$0200a8c0@amilo>
References: <000501c7ff06$4939cd40$0200a8c0@amilo>
Message-ID: <fdd6ms$6ei$1@sea.gmane.org>

Dominique Pignon wrote:

> Bravo pour le guide d'installation!
> Je suppose que vous parlez fran?ais.
> J'ai install? pyrex suivant vos conseils
> tout se passe normalement
> l'exemple primes est install? dans /Lib/site_packages/primes.pyd
>  
> le programme a ?t? compil?
> mais je n'arrive pas  ? faore le test le module n'est pas reconnu:
>  
>  >>> primes
> Traceback (most recent call last):
>   File "<pyshell#4>", line 1, in -toplevel-
>     primes
> NameError: name 'primes' is not defined

   >>> import primes
   >>> primes

</F>



From jasondrew72 at gmail.com  Mon Sep 17 09:50:22 2007
From: jasondrew72 at gmail.com (Jason Drew)
Date: Mon, 17 Sep 2007 06:50:22 -0700
Subject: simple regular expression problem
In-Reply-To: <1190035916.278037.56070@57g2000hsv.googlegroups.com>
References: <1190034041.796626.66790@n39g2000hsh.googlegroups.com>
	<1190035328.837246.318920@d55g2000hsg.googlegroups.com>
	<1190035916.278037.56070@57g2000hsv.googlegroups.com>
Message-ID: <1190037022.404652.269620@r29g2000hsg.googlegroups.com>

You're welcome!

Also, of course, parsing XML is a very common task and you might be
interested in using one of the standard modules for that, e.g.
http://docs.python.org/lib/module-xml.parsers.expat.html

Then all the tricky parsing work has been done for you.

Jason


On Sep 17, 9:31 am, duikboot <dijkstra.ar... at gmail.com> wrote:
> Thank you very much, it works. I guess I didn't read it right.
>
> Arjen
>
> On Sep 17, 3:22 pm, Jason Drew <jasondre... at gmail.com> wrote:
>
> > You just need a one-character addition to your regex:
>
> > regex = re.compile(r'<organisatie.*?</organisatie>', re.S)
>
> > Note, there is now a question mark (?) after the .*
>
> > By default, regular expressions are "greedy" and will grab as much
> > text as possible when making a match. So your original expression was
> > grabbing everything between the first opening tag and the last closing
> > tag. The question mark says, don't be greedy, and you get the
> > behaviour you need.
>
> > This is covered in the documentation for the re module.http://docs.python.org/lib/module-re.html
>
> > Jason
>
> > On Sep 17, 9:00 am, duikboot <dijkstra.ar... at gmail.com> wrote:
>
> > > Hello,
>
> > > I am trying to extract a list of strings from a text. I am looking it
> > > for hours now, googling didn't help either.
> > > Could you please help me?
>
> > > >>>s = """ \n<organisatie>\n<Profiel_Id>28996</Profiel_Id>\n</organisatie>\n<organisatie>\n<Profiel_Id>28997</Profiel_Id>\n</organisatie>"""
> > > >>> regex = re.compile(r'<organisatie.*</organisatie>', re.S)
> > > >>> L = regex.findall(s)
> > > >>> print L
>
> > > ['organisatie>\n<Profiel_Id>28996</Profiel_Id>\n</organisatie>
> > > \n<organisatie>\n<Profiel_Id>28997</Profiel_Id>\n</organisatie']
>
> > > I expected:
> > > [('organisatie>\n<Profiel_Id>28996</Profiel_Id>\n</organisatie>
> > > \n<organisatie>), (<organisatie>\n<Profiel_Id>28997</Profiel_Id>\n</
> > > organisatie')]
>
> > > I must be missing something very obvious.
>
> > > Greetings Arjen




From freeaircon at gmail.com  Thu Sep 27 11:41:19 2007
From: freeaircon at gmail.com (freeaircon at gmail.com)
Date: Thu, 27 Sep 2007 15:41:19 -0000
Subject: Traveling Europe
Message-ID: <1190907679.164542.149190@19g2000hsx.googlegroups.com>

World's most popular traveling destinations

http://world-traveling-destinations.blogspot.com/



From jergosh at wp.pl  Sun Sep  2 06:13:12 2007
From: jergosh at wp.pl (=?UTF-8?B?R3J6ZWdvcnogU8WCb2Rrb3dpY3o=?=)
Date: Sun, 02 Sep 2007 12:13:12 +0200
Subject: So what exactly is a complex number?
In-Reply-To: <lbjpq4-eo22.ln1@ozzie.tundraware.com>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>	<mailman.212.1188576194.28954.python-list@python.org>	<451mq4-les.ln1@ozzie.tundraware.com>	<mailman.266.1188644067.28954.python-list@python.org>
	<lbjpq4-eo22.ln1@ozzie.tundraware.com>
Message-ID: <46DA8CB8.3000104@wp.pl>

>  I was trying to motivate the idea by means of analogy. This is a
>  legitimate thing to do.  It helps lead people to a conceptual
>  understanding long before they understand the minutae.
You're mixing terms again. Analogy is saying 'something is like 
something else.'  What you are saying is 'Something is used to represent 
something.' You also make a scalar - vector distinction which is neither 
here nor there and implies that complex numbers are vectors, as opposed 
to real numbers.

Are you seriously saying that the imaginary unit is a small detail when 
explaining complex numbers? If you don't even mention the form 'a + bi' 
how can anyone make heads or tails of it? You omit many logical steps in 
what you think to be a simple explanation.

In fact, a proper vector in physics has 4 features: point of 
application, magnitude, direction and sense. In case of a vector in two 
dimensions (a special case, which you also fail to stress not to mention 
that you were talking about space) the magnitude and sense can be 
described by one number and the direction as another.  Since a complex 
number is composed of two numbers it can be used to describe those 
features of a vector.
Numbers are commonly used to represent breast sizes. This doesn't mean 
numbers are breasts, alas. If someone asks you what numbers are and you 
say only that they are used to denote breasts sizes, you might create 
the wrong impression.

>  I just didn't think that was the best place to start explicating the
>  *concept*. I find concrete examples that then can lead to theoretical
>  underpinnings a better way to go than the reverse.
1. Actual answer to the question can hardly be regarded as 'theoretical 
underpinnings'
2. You don't mention that answer at all.
3. Your 'concrete example' is equally sloppy and full of omissions.

>  It is so hard to grasp that learning happens in layers, and that each
>  layer need not be complete or even precise?
Is it so hard to grasp that you completely omit certain important layers?

>  Evidently you've either never taught (or were very bad at it).  You
>  have to motivate concept and interest before you can get to the
>  precise detail.
If someone asks a question their interest is evident, I think. I also 
reckon they expect a simple answer which in this case is either a link 
or something along the lines:

'As you know, square roots of negative numbers aren't real numbers. We 
are taught at school that they "don't exist". However, if we denote 
square root of -1 as i we can represent any such root as a product of a 
real number and i.
Eg.
sqrt(-9) = sqrt(9 * -1) = 3 * i
sqrt(-0.25) = sqrt(0.25 * -1) = 0.5i etc.

Since sqrt(-1) has little representation in the surrounding world 
(saying "I have 2i apples" makes no sense) it's called the imaginary 
unit. Now, complex numbers are numbers of the form
a + bi
where a and b are real numbers. They have been invented because they 
have many applications in mathematics, physics, engineering etc. They 
have many useful properties, perhaps most important of which being that 
i2 = -1. <Explanation of complex plane as an example of application>

Note that real numbers are a subset of complex numbers. They are complex 
numbers with imaginary part equal to 0.
Also, since i also means current in physics and electrical engineering, 
the imaginary unit is denoted as j in those contexts. This is also the 
case in Python (presumably because i is a common name for an integer 
variable). Speaking of which, they are a built-in type in Py. Try 
performing operations on them in the interactive mode:
> >> c = 4 + 1j d = 1 + 2j c + d
(5+5j)
> >> c = 1j # 1 is necessary because 'j' is a legit name for a
> >> variable c * c
(-1+0j)'

And no, I've never taught professionally. Have you?

>  For instance, you start with Newtonian physics, not quantum physics.
>  The entry level physics classes ignore things like the the non-linear
>  behavior of springs, or the effects when you don't actually do things
>  in a vacuum.  By your definition these lectures would be "wrong" ..
>  but they're not. They are attempting to introduce a topic painlessly.
>  And that's what I was doing.
That's not what you were doing. You were doing the equivalent of 'Hello, 
today we shall discuss gravity. I have 23 apples here, and I will throw 
them at 45 degrees - let's denote this by a vector. I throw them. Oh 
look, they fell! Well, that's gravity. Thank you for your attention.'

> > does it come from, why is it 'imaginary' etc.  Since we're being
> > arses here I'd hazard a guess you were educated in the USA where
> > doing without understanding has been mastered by teachers and
> > students alike. You're
>
>  I was initially educated in Europe where being rude was sometimes
>  encouraged to mask insecurity with a false sense of self-importance.
>  I was later educated in both Canada and the US wherein I learned both
>  they "why" and the how"
I'm sorry I made a generalisation from a tendency that I encountered. I 
shouldn't have done that. But the fact remains that your explanation, 
further statements and general mental sloppiness are excellent examples 
of what I said. Whether you learned how and why is debatable but you 
certainly don't know how to pass knowledge on.

GS.



From buzzard at urubu.freeserve.co.uk  Mon Sep  3 11:39:48 2007
From: buzzard at urubu.freeserve.co.uk (Duncan Smith)
Date: Mon, 03 Sep 2007 16:39:48 +0100
Subject: Problem with extremely small real number
In-Reply-To: <1188831370.133673.205230@r29g2000hsg.googlegroups.com>
References: <1188831370.133673.205230@r29g2000hsg.googlegroups.com>
Message-ID: <fbh9o2$n0a$1@energise.enta.net>

Andrea wrote:
> Hi,
> I need to calculate this probability P!/{n \choose p}, varying both n
> and p, n takes values in this range [512:1024] and p in [2:12].
> So i write this code in python:
> 
> def factorial(n):
> 	result=1
> 	if n==0: return 1
> 	for i in xrange(1, abs(n)+1):
> 		result = i*result
> 	if n >= 0:
> 		return result
> 	else:
> 		return -result
> def binomial(n, k):
> 	assert n>0 and isinstance(n, (int, long)) and isinstance(k,
> (int,long))
> 	if k < 0 or k > n:
> 		return 0
> 	if k == 0 or k == n:
> 		return 1
> 	return factorial(n) // (factorial(k) * factorial(n-k))
> 
> I want to call factorial(2)//binomial(1024,2) for example, in this way
> trivially I obtain 0 as probability, how can I obtain the probability
> forcing this division to output extremely small real numbers????
> 

'//' is floor division.

>>> 2/523776
0
>>> 2//523776
0
>>> float(2)/523776
3.8184261974584555e-006
>>> from __future__ import division
>>> 2/523776
3.8184261974584555e-006
>>> 2//523776
0
>>>

Duncan


From cyberco at gmail.com  Mon Sep 24 12:24:06 2007
From: cyberco at gmail.com (cyberco)
Date: Mon, 24 Sep 2007 16:24:06 -0000
Subject: building a GUI
In-Reply-To: <1190557293.266783.251480@y42g2000hsy.googlegroups.com>
References: <1190557293.266783.251480@y42g2000hsy.googlegroups.com>
Message-ID: <1190651046.952799.167500@d55g2000hsg.googlegroups.com>

Try BoaConstructor and the wxPython library, both are wonderfull. If
you don't mind using Java Swing, and there are good reasons for that,
go for jython. It simplifies the java swingcode so much you don't have
to use a graphical GUI builder anymore :)



From arkanes at gmail.com  Sun Sep  2 20:32:06 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Sun, 2 Sep 2007 19:32:06 -0500
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
In-Reply-To: <5k0rppF1l48jU1@mid.uni-berlin.de>
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
	<1188735642.391419.103650@19g2000hsx.googlegroups.com>
	<1188740716.423349.304370@y42g2000hsy.googlegroups.com>
	<1188743299.664137.194760@d55g2000hsg.googlegroups.com>
	<46daeaec$0$19889$426a74cc@news.free.fr> <46DB04DD.80801@v.loewis.de>
	<46db085d$0$16113$9b4e6d93@newsspool1.arcor-online.net>
	<5k0rppF1l48jU1@mid.uni-berlin.de>
Message-ID: <4866bea60709021732j2c102eb7n6c49514ac86ee45d@mail.gmail.com>

On 9/2/07, Diez B. Roggisch <deets at nospam.web.de> wrote:
> Wildemar Wildenburger schrieb:
> > Martin v. L?wis wrote:
> >>>> (2) it is a interpretation language
> >>> Not quite. It's compiled to byte-code - just like Java (would you call
> >>> Java an 'interpreted language' ?)
> >>
> >> Python is not implemented like Java. In Java (at least in HotSpot),
> >> the byte code is further compiled to machine code before execution;
> >> in Python, the byte code is interpreted.
> >>
> > OK, good. Naive question now comming to mind: Why doesn't Python do the
> > latter as well?
>
> because of the dynamic nature of it. Java is statically typed, so the
> JIT can heavily optimize.
>
> OTH psyco IS a JIT-compiler to optimize certain calculations which are
> mostly of a numerical nature. But this can't be done to the extend it is
> possible in java.
>

Original code: 3 min, 9 seconds
Original code with psyco: 30.28 seconds
Original code, compiled with Pyrex: 1min 39 seconds (moves the for loops into C)
Same, with a,b,c declared with cdef int: 20 seconds (uses c pow()
instead of going through Python).
Same, with the for..xrange loops rewritten to use C integer loops: 13
seconds (saves xrange use, but since the python loop was already gone,
not too much savings).

With a small amount of work, you should be able to implement the C
algorithm in Pyrex (or even just use the C algorithm, in a wrapper
that converts the return value to an int) and get the same speed as
the C version + a constant marshalling factor.

Adding pysco took all of 20 seconds (half that because I needed to
move the module scope code into a function), and re-writing with pyrex
took a minute or two. So, as a demonstration of numeric optmization,
both of them can give you quite good rewards with minimal effort.


From jgardner.jonathangardner.net at gmail.com  Thu Sep  6 17:07:20 2007
From: jgardner.jonathangardner.net at gmail.com (Jonathan Gardner)
Date: Thu, 06 Sep 2007 21:07:20 -0000
Subject: getting the current function
In-Reply-To: <mailman.159.1189093808.2658.python-list@python.org>
References: <mailman.159.1189093808.2658.python-list@python.org>
Message-ID: <1189112840.487100.29730@50g2000hsm.googlegroups.com>

On Sep 6, 8:43 am, Gary Robinson <gary... at mac.com> wrote:
>
> I welcome feedback of any type.
>

This all seems a bit too complicated. Are you sure you want to do
this? Maybe you need to step back and rethink your problem.

Your example can be rewritten a number of different ways that are
easier to think about.

The simple approach:

  _x_counter = 0
  def x():
      _x_counter += 1
      return _x_counter

The generator approach:

  def counter_gen():
      x = 0
      while True:
          x += 1
          yield x

  counter = counter_gen()
  counter.next()
  counter.next() # etc...

A class-based approach:

  class Counter(object):
      def __init__(self):
          self._x = 0

      def count(self):
          self._x += 1
          return self._x

In general, there really isn't a need to mess with stack frames unless
you are really interested in looking at the stack frame.



From arnodel at googlemail.com  Mon Sep  3 11:52:01 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 03 Sep 2007 08:52:01 -0700
Subject: Problem with extremely small real number
In-Reply-To: <1188831370.133673.205230@r29g2000hsg.googlegroups.com>
References: <1188831370.133673.205230@r29g2000hsg.googlegroups.com>
Message-ID: <1188834721.490889.281330@r34g2000hsd.googlegroups.com>

On Sep 3, 3:56 pm, Andrea <aciru... at gmail.com> wrote:
> Hi,
> I need to calculate this probability P!/{n \choose p}, varying both n
> and p, n takes values in this range [512:1024] and p in [2:12].
> So i write this code in python:
>
> def factorial(n):
>         result=1
>         if n==0: return 1
>         for i in xrange(1, abs(n)+1):
>                 result = i*result
>         if n >= 0:
>                 return result
>         else:
>                 return -result
> def binomial(n, k):
>         assert n>0 and isinstance(n, (int, long)) and isinstance(k,
> (int,long))
>         if k < 0 or k > n:
>                 return 0
>         if k == 0 or k == n:
>                 return 1
>         return factorial(n) // (factorial(k) * factorial(n-k))
>
> I want to call factorial(2)//binomial(1024,2) for example, in this way
> trivially I obtain 0 as probability, how can I obtain the probability
> forcing this division to output extremely small real numbers????
>
> I want to produce a program that provide a set of data of this
> probability on varying n and p, in order to plot a surface with this
> data set with gnuplot, any comments or suggestion?
> thanks in advance,
> Andrea

You're using integer division, that's why you probabilities are 0!
In python (up to 2.5 at list), if one integer/long is divided by
another, integer division is used.
But if one of the operands is a float, then the other one is converted
to a float and float division is used.

* convert your integers to floats first.
* Don't use //, use /
(// is 'true division', it will always give you the rounded answer)

[This can cause confusion, and I think it has been changed from v2.6
on - which I haven't got to try so correct me if  I'm wrong]

Thus:
\
>>> float(factorial(2)) / binomial(1024, 2)
3.8184261974584555e-06

BTW
p! / nCp = p! / (n! / p!(n-p)!) = (p!)^2 * (n! / (n-p)!) = (p!)^2 /
\prod_{i=n-p+1}^n i

Therefore:

def product(a, b):
    return reduce(lambda x, y: x*y, xrange(a, b+1))

def f(n, p):
    return float(product(1, p))**2 / product(n-p+1, n)

>>> f(1024, 2)
3.8184261974584555e-06

This will be more efficient.

--
Arnaud




From deets at nospam.web.de  Thu Sep 27 08:20:45 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 27 Sep 2007 14:20:45 +0200
Subject: "No backend servers available" using httplib
References: <1190884447.792688.107710@g4g2000hsf.googlegroups.com>
	<46fb7e40$0$29672$426a74cc@news.free.fr>
	<1190892499.308111.61600@g4g2000hsf.googlegroups.com>
Message-ID: <5m1lgtFb40hpU1@mid.uni-berlin.de>

Henrik Lied wrote:

> On Sep 27, 11:56 am, Bruno Desthuilliers <bruno.
> 42.desthuilli... at wtf.websiteburo.oops.com> wrote:
>> Henrik Lied a ?crit :
>>
>> > Hi there!
>>
>> > I'm using a recipe found on ASPN [1] to upload some data to an
>> > external server.
>>
>> > The request fails, and all I get in response is "No backend servers
>> > available".
>>
>> > So I'm wondering: Is this a known exception-message in httplib,
>>
>> If it was, you should have a full traceback then.
>>
>> > or
>> > could it be an error in the requested external resource?
>> > [1]:http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/146306
>>
>>  From the recipe's code and the message, looks like you're connecting to
>> (or via) a proxy which fails to relay to the real server.
> 
> Hello Bruno,
> 
> The actual reason was quite a bit simpler: The receiving server
> required a certain keyword to be first in the request - which I was
> not aware of. So now it works - but it's not perfect:
> 
> Is there a way to stream the file content over the connection? The way
> it works now, the whole file is loaded into memory, right?

It appears not, as the httplib uses sendall on the underlying socket.

Diez


From steve at REMOVE-THIS-cybersource.com.au  Sun Sep 16 18:29:44 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sun, 16 Sep 2007 22:29:44 -0000
Subject: Needless copying in iterations?
References: <fchk59$mm3$1@daisy.noc.ucla.edu>
	<5l3ab6F5v20uU3@mid.uni-berlin.de> <13eourdrne86e61@corp.supernews.com>
	<874phv42to.fsf@benfinney.id.au> <13epv3fnb6bak15@corp.supernews.com>
	<5l4ghuF655kfU2@mid.uni-berlin.de> <13eqc2daojgho03@corp.supernews.com>
	<7xzlzmoagn.fsf@ruckus.brouhaha.com>
Message-ID: <13erbiogu1k09f0@corp.supernews.com>

On Sun, 16 Sep 2007 09:12:56 -0700, Paul Rubin wrote:

> Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> writes:
>> > What do you mean by Haskell is a dynamic language?  It is statically
>> > and strict typed and the compiler usually knows all the functions. 
>> > No "surprises", no side effects, no duck typing.
>> 
>> Haskell's IO monad (and possibly the do monad?) allows side effects. It
>> would be a pretty poor programming language that didn't allow input or
>> output!
> 
> In a certain theoretical sense, input and output in the IO monad are not
> side effects.

Nevertheless, the authors of the paper listed below say they use the IO 
monad to get mutable objects and therefore side effects.


>> See also http://homepages.cwi.nl/~ralf/OOHaskell/ showing that Haskell
>> can do object-oriented programming, complete with mutable objects and
>> side-effects. Although "duck typing" is listed as a keyword, I couldn't
>> see any reference to it in the paper.
> 
> That describes an OO extension to Haskell, which I suppose is
> interesting, but it's not Haskell.

Built entirely from standard Haskell98. Saying that it isn't Haskell is a 
little like saying that Python plus the Sets module isn't Python anymore.



-- 
Steven.


From zzbbaadd at aol.com  Wed Sep 12 01:19:23 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Tue, 11 Sep 2007 22:19:23 -0700
Subject: Get the complete command line as-is
In-Reply-To: <1189574125.024273.119770@o80g2000hse.googlegroups.com>
References: <1189566000.793354.308420@19g2000hsx.googlegroups.com>
	<1189567985.089215.108250@k79g2000hse.googlegroups.com>
	<1189573229.875265.250340@d55g2000hsg.googlegroups.com>
	<1189574125.024273.119770@o80g2000hse.googlegroups.com>
Message-ID: <1189574363.384564.248160@57g2000hsv.googlegroups.com>


>
> python.exe test.py  "\"abc def\" 123"
>
> import sys
> commandLine = "".join(sys.argv[1:])
>
> print commandLine
>
> gives:
>
> "abc def" 123

With the surrounding quotes you actually only need:

commandLine = sys.argv[1]



From gagsl-py2 at yahoo.com.ar  Sat Sep 29 17:16:08 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 29 Sep 2007 18:16:08 -0300
Subject: How to unload a module after I've imported it.
References: <1191096194.002683.16240@50g2000hsm.googlegroups.com>
	<1191097935.819936.148950@50g2000hsm.googlegroups.com>
Message-ID: <op.tzfpc6imx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 29 Sep 2007 17:32:15 -0300, marvinla <marvinware2005 at gmail.com>  
escribi?:

> Have you tried a del?
>
>>> import socket
>>> dir()
> ['__builtins__', '__doc__', '__name__', 'socket']
>>> del socket
>>> dir()
> ['__builtins__', '__doc__', '__name__']

py> import socket
py> del socket
py> import sys
py> sys.modules['socket']
<module 'socket' from 'c:\apps\Python25\lib\socket.pyc'>

del only removes the reference from the current namespace, but the module  
is still loaded and available.
del sys.modules['socket'] would remove the module so the next import  
statement will have to reload it.

Back to the original question, timeoutsocket replaces some objects in the  
socket module with its own versions, just "unloading" timeoutsocket would  
not be enough, the changes had to be reverted.

timeoutsocket is an old hack for Python 2.2 and earlier. Since 2.3 you can  
achieve the same thing using socket.setdefaulttimeout() so unless you are  
forced to use such ancient versions, it can be dropped.

-- 
Gabriel Genellina



From ldo at geek-central.gen.new_zealand  Fri Sep 21 05:32:46 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Fri, 21 Sep 2007 21:32:46 +1200
Subject: An Editor that Skips to the End of a Def
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87odfxjgjy.fsf@pobox.com>
Message-ID: <fd033u$bnc$1@lust.ihug.co.nz>

In message <87odfxjgjy.fsf at pobox.com>, John J. Lee wrote:

> Seriously for a moment, I read something recently (maybe here?) about
> an Apple study that claimed to show that people who perceived keyboard
> bindings as being much faster than mouseing did not, on average, take
> less time to complete the actions that were studied (they took more
> time, in fact).  The plausible explanation for this was that people's
> subjective perception of time is affected by the greater mental work
> involved in typing (as opposed to mousing) for a given action.

<http://www.asktog.com/SunWorldColumns/S02KeyboardVMouse3.html>


From conra2004 at yahoo.com  Sat Sep 29 13:29:19 2007
From: conra2004 at yahoo.com (yadin)
Date: Sat, 29 Sep 2007 10:29:19 -0700
Subject: xyz points and magnitude to intensity or colormap or contourmap
Message-ID: <1191086959.115748.122450@o80g2000hse.googlegroups.com>

hi!
how do you do contour maps with vtk?
i have 3600 points for each point i have a corresponding magnitude.
i plane to do contour maps that is i plot each point
with a different color (representing its magnitude )
how can i do this with using python, matplotlib or vtk?
does any one have a similar example
please any thing to start wiht wil be good
thanks



From kay.schluehr at gmx.net  Sat Sep 29 00:12:29 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Fri, 28 Sep 2007 21:12:29 -0700
Subject: cute use of lambda
In-Reply-To: <mailman.1270.1191030962.2658.python-list@python.org>
References: <1190945901.551940.165240@k79g2000hse.googlegroups.com>
	<mailman.1270.1191030962.2658.python-list@python.org>
Message-ID: <1191039149.066051.92930@k79g2000hse.googlegroups.com>

On 29 Sep., 03:55, "Terry Reedy" <tjre... at udel.edu> wrote:
> "Simon Forman" <sajmik... at gmail.com> wrote in message
>
> news:1190945901.551940.165240 at k79g2000hse.googlegroups.com...
> | class FakeQueue(list):
> |    put = list.append
> |    get = lambda self: self.pop(0)
>
> Sorry, to me this is a foolish use of lambda as it is exactly the same as
>
>   def get(self): self.pop(0)

Better use

    def get(self): return self.pop(0)

otherwise you will *get* nothing ;)

BTW I wonder why a destructive operation is named *get* instead of
*take* ?



From cjw at sympatico.ca  Mon Sep 17 20:57:20 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Mon, 17 Sep 2007 20:57:20 -0400
Subject: Why 'class spam(object)' instead of class spam(Object)' ?
In-Reply-To: <fbs1id$acq$1@sea.gmane.org>
References: <mailman.205.1189146609.2658.python-list@python.org>	<46e10916$0$16518$4c368faf@roadrunner.com>
	<fbs1id$acq$1@sea.gmane.org>
Message-ID: <46EF2270.6080000@sympatico.ca>

Steve Holden wrote:
> Carl Banks wrote:
>> On Fri, 07 Sep 2007 01:30:00 -0500, Sergio Correia wrote:
>>> Hi, I'm kinda new to Python (that means, I'm a total noob here), but
>>> have one doubt which is more about consistency that anything else.
>>>
>>> Why if PEP 8 says that "Almost without exception, class names use the
>>> CapWords convention", does the most basic class, object, is lowercase?
>> It said "almost".  :)
>>
> Indeed it did, and never forget that most of PEP 8 was derived from an 
> essay by Guido whose original title was "A Foolish Consistency is the 
> Hobgoblin of Little Minds" ...
>>> I found a thread about this:
>>> http://mail.python.org/pipermail/python-list/2007-April/437365.html
>>> where its stated that -object- is actually a type, not a class; but the
>>> idea still doesn't convince me.
> You don't have to be convinced. You just have to do what the PEP says 
> yourself and ignore the people who *haven't* done what it says 
> (particularly if they are core Python developers).
> 
>> There's a false dichotomy there: it's not an either-or situation.  Almost 
>> everyone would agree that new-style classes, defined by the Python class 
>> statement, are both classes and types.  Some might squabble over whether 
>> object is class, but it has nothing to do with why object is spelled in 
>> lower-case.
>>
>> The reason why "object" is lower case is because built-in types are 
>> spelled in lower-case.  Why are built-in types lower case?  Because many 
>> built-in types were originially functions.  For example, "int" and "str" 
>> were once functions.  When these symbols became the names of their 
>> respective types, they kept the lower-case spelling, and it became 
>> convention for built-in types to be spelled lower-case.
>>
> In other words: "Get over it" ;-)
> 
> regards
>   Steve
Surely Python 3000 gives the opportunity to introduce some consistency.

Does the user care whether an object is implemented in C?

Colin W.


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Sep  7 07:05:08 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 07 Sep 2007 13:05:08 +0200
Subject: Class design (information hiding)
In-Reply-To: <fbr2gg$ipg$1@online.de>
References: <fbr2gg$ipg$1@online.de>
Message-ID: <46e1305e$0$18302$426a74cc@news.free.fr>

Alexander Eisenhuth a ?crit :
> Hi all,
> 
> I'm wodering how the information hiding in python is ment. 

Conventions...

> As I 
> understand there  doesn't exist public / protected / private  mechanism, 
> but a '_' and '__' naming convention.

Yes.

> As I figured out there is only public and private possible as speakin in 
> "C++ manner".

Nope. It's either 'interface' (no leading underscore),  'implementation' 
(single leading underscore), 'implementation with some protection 
against accidental overriding' (two leading underscores).

> Are you all happy with it.

Can't speak for others, but as far as I'm concerned, I'm perfectly happy 
with this.

> 
> class A:
>     def __init__(self):
>         self.__z = 1
>         self._z = 2
>         self.z = 3
>     def _getX(self):
>         return "X"
>     def __getY(self):
>         return "Y"
>     def doAnything(self):
>         print self.__getY()
> 
> 
> class B(A):
>     def __init__(self):
>         A.__init__(self)
>         print dir (self)
>  >>> b = B()
> ['_A__getY', '_A__z', '__doc__', '__init__', '__module__', '_getX', 
> '_z', 'doAnything', 'z']
> 
> I was a bit surprised about '_A__getY' and '_A__z'.

It's documented.

(snip)

> What is the idea behind the _ and __ naming.

cf above.

You may also want to read this - while C++ is not Java either, some 
advises may still apply:
http://dirtsimple.org/2004/12/python-is-not-java.html

HTH


From arkanes at gmail.com  Sat Sep  8 14:52:05 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Sat, 8 Sep 2007 13:52:05 -0500
Subject: wxpython automate progress bar
In-Reply-To: <1189275182.954315.16090@19g2000hsx.googlegroups.com>
References: <1189275182.954315.16090@19g2000hsx.googlegroups.com>
Message-ID: <4866bea60709081152i2c87f676h5fc23a68db3bea7c@mail.gmail.com>

On 9/8/07, Jimmy <mcknight0219 at gmail.com> wrote:
> Hi, I want a progress bar to increase automatically, so I wrote code
> like this:
> current = 0
>                 while True:
>                         if current == 100:
>                                 current = 0
>                         self._gauge.SetValue(current)
>                         time.sleep(0.1)
>                         current = current + 1
>
> I put this in the __init__ section, however, the window will never
> show! and there are
> error message like this:
> ** (python:28543): CRITICAL **: clearlooks_style_draw_handle:
> assertion `width >= -1' failed
>
> can anyone tell me why this happen?Thanks :)
>

Because you are blocking the event loop so while you are doing this
your application isn't running and not painting. Use a wx.Timer
instead.

Why are you lying to your users about what you are doing and how long
it is taking anyway?


From bignose+hates-spam at benfinney.id.au  Wed Sep 19 22:08:47 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 20 Sep 2007 12:08:47 +1000
Subject: super() doesn't get superclass
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<1i4lvsx.mhw5621jlsd53N%aleax@mac.com>
	<87r6kwzg1h.fsf@benfinney.id.au>
	<13f3j83lun4ckc5@corp.supernews.com>
Message-ID: <87sl5aw0k0.fsf@benfinney.id.au>

Scott David Daniels <Scott.Daniels at Acm.Org> writes:

> Ben Finney wrote:
> > aleax at mac.com (Alex Martelli) writes:
> >
> >> In general, "a superclass of foo" means "a class X such that foo is a
> >> sublass of X"
> >
> > Sure. However, this doesn't equate to the assertion that "next class
> > in the MRO is the superclass", which is what I was responding to.
> >
> One thing not pointed out in this thread is that the chain of classes
> on the MRO starting with super(A, obj) _will_ include all superclasses
> of A.  That is the guarantee of the MRO, and that is why super is an
> appropriate name.

Yes, it does include those classes. The problem is it also includes an
unknown (to the implementation of A) number of classes that are *not*
superclasses of A. Thus, 'super' is a *bad* name for such a function.

-- 
 \            "There are always those who think they know what is your |
  `\       responsibility better than you do."  -- Ralph Waldo Emerson |
_o__)                                                                  |
Ben Finney


From gregpinero at gmail.com  Tue Sep 11 22:09:28 2007
From: gregpinero at gmail.com (gregpinero at gmail.com)
Date: Wed, 12 Sep 2007 02:09:28 -0000
Subject: Get Only the Last Items in a Traceback
Message-ID: <1189562968.529414.27910@w3g2000hsg.googlegroups.com>

I'm running code via the "exec in context" statement within a much
larger program.  What I would like to do is capture any possible
errors and show a pretty traceback just like the Python interactive
interpreter does, but only show the part of the traceback relating to
the code sent to exec.

For example here is the code I'm using:

try:
    exec code
except Exception,Err:
    traceback.print_exc()

Which gives me something like this when it catches an exception:

Traceback (most recent call last):
  File "/....py", line 843, in run
    semi_safe_exec.safe_eval(code.replace('\r',''),context,5)
  File ".....py", line 400, in safe_eval
    exec_timed(code, context, timeout_secs)
  File ".....py", line 353, in exec_timed
    exec code in context
  File "<string>", line 7, in ?
  File "<string>", line 5, in func2
  File "<string>", line 2, in func1
ZeroDivisionError: integer division or modulo by zero

What I want to print instead is just something like:

Traceback (most recent call last):
  File "<string>", line 7, in ?
  File "<string>", line 5, in func2
  File "<string>", line 2, in func1
ZeroDivisionError: integer division or modulo by zero

Thanks in advance for the help.

-Greg

P.S. if it matters, for this example, code in exec code is:

def func1():
    print 7/0

def func2():
    func1()

func2()



From sjmachin at lexicon.net  Mon Sep 17 18:22:23 2007
From: sjmachin at lexicon.net (John Machin)
Date: Mon, 17 Sep 2007 15:22:23 -0700
Subject: qa
In-Reply-To: <mailman.677.1190066333.2658.python-list@python.org>
References: <46EEEE71.80108@gmail.com>
	<mailman.677.1190066333.2658.python-list@python.org>
Message-ID: <1190067743.203008.162280@k79g2000hse.googlegroups.com>

On Sep 18, 7:59 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Mon, 17 Sep 2007 18:15:29 -0300, Shawn Minisall <trekker... at gmail.com>
> escribi?:
>
> > I'm trying to get a space in between these two strings but it's ignoring
> > the space in between when it prints.
>
> >  >>> string.capwords (string.join([s1 + " " + s2])) * 3
> > 'Spam Ni!Spam Ni!Spam Ni!'
>
> It doesn't matter how many spaces you put in between, capwords will
> collapse all of them into a single space.

This is true. However AFAICT the OP doesn't have multiple spaces --
unless of course his unspecified s1 had trailing space(s) and/or his
unspecified s2 had leading space(s)!!




From bignose+hates-spam at benfinney.id.au  Sun Sep 16 20:46:03 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 17 Sep 2007 10:46:03 +1000
Subject: CherryPy support (was: The path '/' was not found.)
References: <1189972647.697108.315460@g4g2000hsf.googlegroups.com>
Message-ID: <87sl5e2k6s.fsf@benfinney.id.au>

PFGCIO <Michael.O.Rivera at gmail.com> writes:

> I've checked for space/tab problems twice.  Any ideas?

For CherryPy support, you might want to instead try the mailing lists
for that project:

    <URL:http://www.cherrypy.org/wiki/CherryPyInvolved#Howtocontactus>

-- 
 \           "Professionalism has no place in art, and hacking is art. |
  `\      Software Engineering might be science; but that's not what I |
_o__)        do. I'm a hacker, not an engineer."  -- Jamie W. Zawinski |
Ben Finney


From hidalgovelazquez at gmail.com  Sun Sep 23 06:38:29 2007
From: hidalgovelazquez at gmail.com (Hidalgo Velázquez)
Date: Sun, 23 Sep 2007 12:38:29 +0200
Subject: Naples is burning
Message-ID: <ufgcf3d0ags1qlnnka781pkbuagpf8u5oq@4ax.com>

Please, dear Mr Bush: we don't have weapons of destruction mass, but
bomb my people and save us.
Please, dear old friend Vesuvio: wake up and save us.
Please, dear Jesus Christ: give us the Big One and save us...

http://www.youtube.com/watch?v=eU3fNRcBtQw


From jfine at pytex.org  Tue Sep 18 15:05:40 2007
From: jfine at pytex.org (Jonathan Fine)
Date: Tue, 18 Sep 2007 20:05:40 +0100
Subject: cvs module
References: <fcp682$goe$1@foggy.unx.sas.com>
Message-ID: <46F02184.30003@pytex.org>

Tim Arnold wrote:
> Hi, I need to do some scripting that interacts with CVS. I've been just 
> doing system calls and parsing the output to figure out what's going on, but 
> it would be nice to deal with CVS directly.
> 
> Does anyone know of a python module I can use to interface with CVS?
> thanks,

Hello Tim

Not exactly what you asked for, but I've integrated Tortoise CVS with 
WinEdt.  This gives users with menu commands in WinEdt for invoking 
Tortoise.  Works well for my users, but might not meet your need.

Have you looked at
     http://rhaptos.org/downloads/python/pycvs/

Or for Subversion
     http://pysvn.tigris.org/

If you use Subversion, you call then also use Trac (which is written in 
Python)
     http://trac.edgewall.org/

Please let us know how you get on.

-- 
Jonathan





From karthikiyengar111 at gmail.com  Wed Sep  5 01:12:26 2007
From: karthikiyengar111 at gmail.com (Karthik)
Date: Tue, 04 Sep 2007 22:12:26 -0700
Subject: How do i record and invert a sound wave in real time using Tkinter,
	tkSnack and wave modules?
Message-ID: <1188969146.599520.233450@y42g2000hsy.googlegroups.com>

Hi,
I want to record a sound wave from a mic and at the same time invert
it and play the inverted wave.My code goes as follows, however nothing
is written into the E:\inverted.wav file.Thanks in advance for any
help.

from Tkinter import *
root = Tk()
import tkSnack
tkSnack.initializeSnack(root)
t=tkSnack
import wave
import audioop
a=audioop
w=wave
import threading
import os
def fin():

		s=t.Sound(file='E:/final.wav')
		s.frequency=44100
		s.record()    #Start recording
		def invert():
			global f,i,as
			f=w.open("E:\\final.wav","r")
			frame=f.readframes(1)
			i=w.open("E:\\inverted.wav","w")
			#sw=f.getsampwidth()
			i.setsampwidth(2)
			#nf=f.getnframes()
			i.setnframes(30*50000)
			#nc=f.getnchannels()
			i.setnchannels(1)
			#fr=f.getframerate()
			i.setframerate(44100)
			f.setpos(220500)
			c=0
			while frame:
                                #invert and write it to inverted.wav
				i.writeframesraw(audioop.mul(frame,2,-1.0))
                                c=c+1
				frame=f.readframes(1)
				if c==100:
					as=t.Sound(load='E:/inverted.wav')
					as.play()


		def stp():
			s.stop()
			as.stop()
			f.close()
			i.close()

		k=threading.Timer(30.0000,stp) #Stop recording after 30 sec
		k.start()
		j=threading.Timer(5.00000,invert) #Start reading recorded file
		j.start()                                      #after 5sec

fin()



From newsuser at stacom-software.de  Tue Sep 25 09:37:25 2007
From: newsuser at stacom-software.de (Alexander Eisenhuth)
Date: Tue, 25 Sep 2007 15:37:25 +0200
Subject: PyQt disconnect signal / slot
In-Reply-To: <mailman.1045.1190727345.2658.python-list@python.org>
References: <fdb257$lra$1@online.de>
	<mailman.1045.1190727345.2658.python-list@python.org>
Message-ID: <fdb2uk$mlo$1@online.de>

Phil, thanks for that quick reply

Phil Thompson schrieb:
> On Tuesday 25 September 2007, Alexander Eisenhuth wrote:
>> Hello PyQt experts,
>>
>> do i have to disconnect all signal/slots, after the emitting object is
>> deleted, or does it the QObject destructor?
> 
> It's done for you - same as Qt.
> 
> Phil


From munncha at gmail.com  Sat Sep 22 19:18:07 2007
From: munncha at gmail.com (Kurtis Heimerl)
Date: Sat, 22 Sep 2007 16:18:07 -0700
Subject: Threading preemption questions
Message-ID: <9a4753250709221618x246249d0p5d7abe9092cf4ef7@mail.gmail.com>

Hi, I'm developing my first python application, a multi-threaded cell phone
gadget on ubuntu 7.10. I've just split off my first thread, and I've noticed
something extremely strange: There doesn't seem to be any preemption. There
are currently two threads, one that pings a storage service to see if there
are messages available, and the other that runs the gtk windows. If I do not
explicitly yield either one, it runs forever. I'm assuming this is a setting
somewhere, but that's a very strange default behavior.

How do I get this to go about preempting these threads? Any advice would be
helpful. Thanks!
-------------- next part --------------
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From sreisscruz at gmail.com  Tue Sep 11 14:12:01 2007
From: sreisscruz at gmail.com (Steve)
Date: Tue, 11 Sep 2007 11:12:01 -0700
Subject: Help With PyParsing of output from win32pdhutil.ShowAllProcesses()
Message-ID: <1189534321.833098.114700@g4g2000hsf.googlegroups.com>

Hi All (especially Paul McGuire!)

Could you lend a hand in the grammar and paring of the output from the
function win32pdhutil.ShowAllProcesses()?

This is the code that I have so far (it is very clumsy at the
moment) :


import string
import win32api
import win32pdhutil
import re
import pyparsing


process_info = win32pdhutil.ShowAllProcesses()

print process_info
print

## Output from ShowAllProcesses :

##Process Name   ID Process,% Processor Time,% User Time,% Privileged
Time,Virtual Bytes Peak,Virtual Bytes
##PyScripter     	 2572     0     0     0 96370688 96370688
##vmnetdhcp      	 1184     0     0     0 13942784 13942784
##vmount2        	  780     0     0     0 40497152 38400000
##ipoint         	  260     0     0     0 63074304 58531840


sProcess_Info = str(process_info)
print('type = ', type(sProcess_Info))

## Try some test data :
test = ('Process Name   ID Process,% Processor Time,% User Time,%
Privileged Time,Virtual Bytes Peak,Virtual Bytes',
        'PyScripter     	 2572     0     0     0 96370688 96370688',
        'vmnetdhcp      	 1184     0     0     0 13942784 13942784',
        'vmount2        	  780     0     0     0 40497152 38400000',
        'ipoint         	  260     0     0     0 63074304 58531840')

heading = pyparsing.Literal('Process Name   ID Process,% Processor
Time,% User Time,% Privileged Time,Virtual Bytes Peak,Virtual
Bytes').suppress()
integer = pyparsing.Word(pyparsing.nums)
process_name = pyparsing.Word(pyparsing.alphas)

#ProcessList = heading + process_name + pyparsing.OneOrMore(integer)
ProcessList = process_name + pyparsing.OneOrMore(integer)

# Now parse data and print results

for current_line in test :
    print('Current line = %s') % (current_line)

    try:
       data = ProcessList.parseString(current_line)
       print "data:", data
    except:
       pass


print('\n\nParse Actual data : \n\n')
## Parse the actual data from ShowAllProcesses :

ProcessList = heading + process_name + pyparsing.OneOrMore(integer)
data = ProcessList.parseString(sProcess_Info)
print "data:", data
print "data.asList():",
print "data keys:", data.keys()



=====

Output from run :


Process Name ID Process,% Processor Time,% User Time,% Privileged
Time,Virtual Bytes Peak,Virtual Bytes
PyScripter       2572     0     0     0 101416960 97730560
vmnetdhcp        1184     0     0     0 13942784 13942784
vmount2           780     0     0     0 40497152 38400000
ipoint            260     0     0     0 65175552 58535936
DockingDirector   916     0     0     0 102903808 101695488
vmnat             832     0     0     0 15757312 15757312
svchost          1060     0     0     0 74764288 72294400
svchost          1120     0     0     0 46632960 45846528
svchost          1768     0     0     0 131002368 113393664
svchost          1988     0     0     0 33619968 31047680
svchost           236     0     0     0 39841792 39055360
System              4     0     0     0 3624960 1921024
....

None

('type = ', <type 'str'>)
Current line = Process Name   ID Process,% Processor Time,% User Time,
% Privileged Time,Virtual Bytes Peak,Virtual Bytes
Current line = PyScripter        2572     0     0     0 96370688
96370688
data: ['PyScripter', '2572', '0', '0', '0', '96370688', '96370688']
Current line = vmnetdhcp         1184     0     0     0 13942784
13942784
data: ['vmnetdhcp', '1184', '0', '0', '0', '13942784', '13942784']
Current line = vmount2            780     0     0     0 40497152
38400000
data: ['vmount', '2', '780', '0', '0', '0', '40497152', '38400000']
Current line = ipoint             260     0     0     0 63074304
58531840
data: ['ipoint', '260', '0', '0', '0', '63074304', '58531840']


Parse Actual data :


Traceback (most recent call last):
  File "ProcessInfo.py", line 55, in <module>
    data = ProcessList.parseString(sProcess_Info)
  File "C:\Python25\lib\site-packages\pyparsing.py", line 821, in
parseString
    loc, tokens = self._parse( instring.expandtabs(), 0 )
  File "C:\Python25\lib\site-packages\pyparsing.py", line 712, in
_parseNoCache
    loc,tokens = self.parseImpl( instring, preloc, doActions )
  File "C:\Python25\lib\site-packages\pyparsing.py", line 1864, in
parseImpl
    loc, resultlist = self.exprs[0]._parse( instring, loc, doActions,
callPreParse=False )
  File "C:\Python25\lib\site-packages\pyparsing.py", line 716, in
_parseNoCache
    loc,tokens = self.parseImpl( instring, preloc, doActions )
  File "C:\Python25\lib\site-packages\pyparsing.py", line 2106, in
parseImpl
    return self.expr._parse( instring, loc, doActions,
callPreParse=False )
  File "C:\Python25\lib\site-packages\pyparsing.py", line 716, in
_parseNoCache
    loc,tokens = self.parseImpl( instring, preloc, doActions )
  File "C:\Python25\lib\site-packages\pyparsing.py", line 1118, in
parseImpl
    raise exc
pyparsing.ParseException: Expected "Process Name   ID Process,%
Processor Time,% User Time,% Privileged Time,Virtual Bytes
Peak,Virtual Bytes" (at char 0), (line:1, col:1)



Many thanks!

Steve



From mrabens at gmail.com  Mon Sep 10 14:10:04 2007
From: mrabens at gmail.com (mrabens at gmail.com)
Date: Mon, 10 Sep 2007 11:10:04 -0700
Subject: C API (embedded Python): How to get and set named variables
Message-ID: <1189447804.880483.175290@50g2000hsm.googlegroups.com>

>From the C API (I'm using Python embedded), how can I get and set the
value of named variables?  Right now, I'm using hacks like
PyRun_SimpleString("foobar = 12\n"), but I'd really like to access the
named objects directly.



From BjornSteinarFjeldPettersen at gmail.com  Tue Sep 25 13:35:03 2007
From: BjornSteinarFjeldPettersen at gmail.com (thebjorn)
Date: Tue, 25 Sep 2007 10:35:03 -0700
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
Message-ID: <1190741703.958265.292670@50g2000hsm.googlegroups.com>

On Sep 25, 10:53 am, Mark Summerfield <m.n.summerfi... at googlemail.com>
wrote:
> Hi,
>
> Below is a PEP proposal for a sorteddict. It arises out of a
> discussion on this list that began a few weeks ago with the subject of
> "An ordered dictionary for the Python library?", and a similar one on
> the P3K mailing list with the subject "ordered dict for p3k
> collections?".
>
> If there is positive feedback I will submit the PEP to the reviewers,
> so if you think it is a good idea please say so. (I'm sure that if you
> _don't_ like it you'll tell me anyway:-)

I can't see much advantage over:

  for key in sorted(mydict):
      ...

A much simpler data-structure, that is also very useful, is a
dictionary that keeps insertion order -- it's also something that's a
tad bit more difficult to implement yourself than the above. My
personal implementation is documented at http://blog.tkbe.org/archive/python-property-set/
It's very tempting to add value access by numerical index (I did as
well), however I now think it's a mistake.

-1 from me.

-- bjorn






From steve at holdenweb.com  Fri Sep  7 13:31:48 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 07 Sep 2007 10:31:48 -0700
Subject: startswith( prefix[, start[, end]]) Query
In-Reply-To: <46e10284$0$439$426a34cc@news.free.fr>
References: <1189087752.538726.101350@r29g2000hsg.googlegroups.com>	<46e00d7e$0$16413$426a74cc@news.free.fr>	<1189145398.081080.59580@r34g2000hsd.googlegroups.com>	<mailman.206.1189147329.2658.python-list@python.org>
	<46e10284$0$439$426a34cc@news.free.fr>
Message-ID: <fbs1u4$bhh$1@sea.gmane.org>

Bruno Desthuilliers wrote:
> Steve Holden a ?crit :
[...]
>>
>> Probably not really necessary, though, and they do say that premature 
>> optimization is the root of all evil ...
> 
> I wouldn't call this one "premature" optimization, since it doesn't 
> change the algorithm, doesn't introduce (much) complication, and is 
> proven to really save on lookup time.
> 
> Now I do agree that unless you have quite a lot of prefixes to test, it 
> might not be that necessary in this particular case...

The defense rests.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From sergio.correia at gmail.com  Wed Sep 26 19:01:42 2007
From: sergio.correia at gmail.com (Sergio Correia)
Date: Wed, 26 Sep 2007 18:01:42 -0500
Subject: Simple threading example freezes IDLE?
In-Reply-To: <f1aa6d810709261600u6a7d1970q26d367ebf6ad01b3@mail.gmail.com>
References: <1190218626.334442.255450@57g2000hsv.googlegroups.com>
	<f1aa6d810709261450k575cf5b6s90615fc98a61eb1f@mail.gmail.com>
	<f1aa6d810709261600u6a7d1970q26d367ebf6ad01b3@mail.gmail.com>
Message-ID: <f1aa6d810709261601n79960111g80b6d7f2669432fd@mail.gmail.com>

I think I have pinpointed the error:

When the -print- command fills the screen, IDLE crashes. That is, if i
have 30 empty lines before I start to push the current screen upwards,
when the last of those lines is used, and its time to push the screen
upwards, IDLE crashes.

I'm using IDLE 1.2.1, Python 2.5.1, and Tk 8.4. Does anyone has any
idea of why is this happening?

Thanks,
Sergio

Example code   --->  http://pastebin.com/f21868e26

import time
import Queue
import threading

class Worker(threading.Thread):

    def __init__(self,  inQueue, **kwds):
        threading.Thread.__init__(self, **kwds)
        self.inQueue = inQueue
        self.setDaemon(True)
        self.start()

    def run(self):
        while True:
            item = self.inQueue.get()
            print item
            self.inQueue.task_done()
            time.sleep(0.1)

qSymbols = Queue.Queue()
symbols = range(50)
for symbol in sorted(symbols):
    qSymbols.put_nowait(symbol)

Worker(qSymbols) # Start thread
qSymbols.join()
print "The End..."




On 9/26/07, Sergio Correia <sergio.correia at gmail.com> wrote:
> I think the -print- command, as used in IDLE, is not thread-safe. I
> was bitten by an issue like that today, and the problem ended up being
> the -print- command I used.
>
> On the cmd line, it works per-fect-ly.. but IDLE seems to be the culprit.
> A possible answer seems to be to write a wrapper for print that makes
> it thread safe (with the help of a lock.
>
> On 9/19/07, writser at gmail.com <writser at gmail.com> wrote:
> > hey all,
> >
> > For my study I'm writing a simple threaded webcrawler and I am trying
> > to do this in python. But somehow, using threads causes IDLE to crash
> > on Windows XP (with the latest python distribution 2.5.1). Even a
> > simple example such as this:
> >
> > import thread, time
> >
> > def doSomething():
> >   print "something"
> >
> > for i in range(2):
> >   thread.start_new(doSomething, ())
> >
> > causes IDLE to freeze when I type it in the interpreter. Using the
> > python command line everything works just fine. Using IDLE on Debian
> > linux also does not cause anything to crash. What am I overlooking?
> >
> > regards, Writser Cleveringa
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>


From jstroud at mbi.ucla.edu  Tue Sep 25 16:28:25 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Tue, 25 Sep 2007 13:28:25 -0700
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <mailman.1039.1190716656.2658.python-list@python.org>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>	<59e9fd3a0709250313v76a7626dn69908b39e4ba100b@mail.gmail.com>
	<mailman.1039.1190716656.2658.python-list@python.org>
Message-ID: <46F96F69.6080405@mbi.ucla.edu>

Mark Summerfield wrote:
> On 2007-09-25, Andrew Durdin wrote:
>> e.g. sorteddict({1:'a', 3:'b': 5:'c', 99:'d'})[3]  should return 'b', not
>> 'd'.
> 
> The sorteddict really does work in key order, so:
> 
>     d = sorteddict({1:'a', 3:'b', 5:'c', 99:'d'})
>     d.items()
>     [(1, 'a'), (3, 'b'), (5, 'c'), (99, 'd')]
> 
> If you do d[3] you will get 'd' since that is the 4th sequential item.
> If you want to get the item with _key_ 3 then use value():
> 
>     d.value(3)
>     'd'

If a quorum opinion might sway you, I have found, after prolonged and 
almost metaphysical type meditation on and experimentation with the 
subject, that it would be undesirable to support the type of ambiguous 
item access that you suggest.

1.  It would break symmetry with __setitem__:

     >>> d = sorteddict({1:'a', 3:'b', 5:'c', 99:'d'})
     >>> d[2] = 'x'
     >>> d[2]
     'b'

     The need for a work-around in this case (i.e. value()) sends
     a flag that something is clumsy about the interface. It seems that
     the presence of the value() method exists simply to compensate
     for the "broken" design. More symmetrical would be to make value()
     or some other well named method return a value at an index.

2.  Such ambiguity breaks 100% compatiblity with the built-in
     dict. I think the success of a sorted dict would be tied quite
     closely to its being a superset of dict. This compatibility
     not only makes it easy for people to start using sorteddict
     without remembering the distinctions but should also reduce
     the need for explicit type checking in libraries that use
     sorteddict.


James


From ldo at geek-central.gen.new_zealand  Sun Sep  9 23:02:58 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 10 Sep 2007 15:02:58 +1200
Subject: Python syntax wart
References: <fbvvil$7dj$1@lust.ihug.co.nz> <5khh6nF3i5nuU1@mid.uni-berlin.de>
	<46E390B7.2080808@web.de> <fc0518$aa2$5@lust.ihug.co.nz>
	<5ki2sdF3nr68U1@mid.individual.net>
Message-ID: <fc2c52$i1l$3@lust.ihug.co.nz>

In message <5ki2sdF3nr68U1 at mid.individual.net>, Bjoern Schliessmann wrote:

> Lawrence D'Oliveiro wrote:
>> But then you can no longer use indentation to display the
>> two-dimensional structure of the statement.
> 
> How can a statement be two-dimensional?

Like this (from C++ code, but the idea is the same):

    if
      (
            ThisCh >= 'A' and ThisCh <= 'Z'
        or
            ThisCh >= '0' and ThisCh <= '9'
        or
            ThisCh == '_'
        or
            ThisCh == '.'
      )
        ...



From martin at v.loewis.de  Sat Sep 22 11:08:45 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 22 Sep 2007 17:08:45 +0200
Subject: Building Python with VC8 on x64 Vista
In-Reply-To: <1190299551.573204.322440@57g2000hsv.googlegroups.com>
References: <1190299551.573204.322440@57g2000hsv.googlegroups.com>
Message-ID: <46F52FFD.3040500@v.loewis.de>

> 1>py_dyn_test.obj : error LNK2001: unresolved external symbol
> _Py_NoneStruct

Could it be that py_dyn_test.obj is a x86 (not AMD64) object
file? Run dumpbin.

Regards,
Martin


From DustanGroups at gmail.com  Tue Sep 18 21:49:09 2007
From: DustanGroups at gmail.com (Dustan)
Date: Wed, 19 Sep 2007 01:49:09 -0000
Subject: Sets in Python
In-Reply-To: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
Message-ID: <1190166549.112117.149540@57g2000hsv.googlegroups.com>

On Sep 18, 7:39 pm, sapsi <saptarshi.g... at gmail.com> wrote:
> Hello,
> I recently tried using the set function in Python and was surprised to
> find that
>
> a=[ 1, 2,3, [1,2] ]
>
> doesn't work with 'set', throwing TyperError (unhashable exception). I
> found out that this is because lists can't be hashed.
>
> So,this implies 'a' cannot be a set in python which i think is quite
> unfortunate, after all 'a' does look like a mathematical set.

It is not the variable *a* itself that's a problem when constructing a
set (ie. set(a)); it is the content. set() goes through each of the
items and adds that item to the set. 1, 2, and 3 are valid because
they can be hashed. The next item in the list, however, is [1,2], and
cannot be hashed because it is a mutable list.

The solution is as Raymond Hettinger said:

a = set([1, 2, 3, frozenset([1, 2])])

> My question is,
> 1) Why can't lists be hashed?

They're mutable.

> and
> 2) This is not related, but is there i neat way (without pop and list
> comprehension) to convert a set into a list? I say neat because i'm
> guessing using list comprehension might turn out be slow and there
> might be other methods which are faster.

list(a_set)

> Thank you for your time

You're welcome.



From chris.monsanto at gmail.com  Fri Sep 21 17:11:56 2007
From: chris.monsanto at gmail.com (chris.monsanto at gmail.com)
Date: Fri, 21 Sep 2007 14:11:56 -0700
Subject: newb: Simple regex problem headache
In-Reply-To: <1190408680.273525.209270@w3g2000hsg.googlegroups.com>
References: <1190408680.273525.209270@w3g2000hsg.googlegroups.com>
Message-ID: <1190409116.456756.43260@22g2000hsm.googlegroups.com>

On Sep 21, 5:04 pm, crybaby <joemystery... at gmail.com> wrote:
> import re
>
> s1 ='&nbsp;25000&nbsp;'
> s2 = '&nbsp;5.5910&nbsp;'
>
> mypat = re.compile('[0-9]*(\.[0-9]*|$)')
> rate= mypat.search(s1)
> print rate.group()
>
> rate=mypat.search(s2)
> print rate.group()
> rate = mypat.search(s1)
> price = float(rate.group())
> print price
>
> I get an error when it hits the whole number, that is in this format:
> s1 ='&nbsp;25000&nbsp;'
> For whole number s2, mypat catching empty string.  I want it to give
> me 25000.
> I am getting this error:
>
>     price = float(rate.group())
>     ValueError: empty string for float()
>
> Anyone knows, how I can get 25000 out of s2 = '&nbsp;5.5910&nbsp;'
> using regex pattern, mypat = re.compile('[0-9]*(\.[0-9]*|$)').  mypat
> works fine for real numbers, but doesn't work for whole numbers.
>
> thanks

Your pattern matches the empty string a bit too well, if you know what
I mean!

Changing the regex slightly to '[0-9]+(\.[0-9]+)?' yields the results
you want:

25000
5.5910
25000.0




From chris.monsanto at gmail.com  Tue Sep 25 15:51:43 2007
From: chris.monsanto at gmail.com (chris.monsanto at gmail.com)
Date: Tue, 25 Sep 2007 12:51:43 -0700
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <1190741703.958265.292670@50g2000hsm.googlegroups.com>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190741703.958265.292670@50g2000hsm.googlegroups.com>
Message-ID: <1190749903.499945.172350@o80g2000hse.googlegroups.com>

On Sep 25, 1:35 pm, thebjorn <BjornSteinarFjeldPetter... at gmail.com>
wrote:
> On Sep 25, 10:53 am, Mark Summerfield <m.n.summerfi... at googlemail.com>
> wrote:
>
> > Hi,
>
> > Below is a PEP proposal for a sorteddict. It arises out of a
> > discussion on this list that began a few weeks ago with the subject of
> > "An ordered dictionary for the Python library?", and a similar one on
> > the P3K mailing list with the subject "ordered dict for p3k
> > collections?".
>
> > If there is positive feedback I will submit the PEP to the reviewers,
> > so if you think it is a good idea please say so. (I'm sure that if you
> > _don't_ like it you'll tell me anyway:-)
>
> I can't see much advantage over:
>
>   for key in sorted(mydict):
>       ...
>
> A much simpler data-structure, that is also very useful, is a
> dictionary that keeps insertion order -- it's also something that's a
> tad bit more difficult to implement yourself than the above. My
> personal implementation is documented athttp://blog.tkbe.org/archive/python-property-set/
> It's very tempting to add value access by numerical index (I did as
> well), however I now think it's a mistake.
>
> -1 from me.
>
> -- bjorn

I agree on both counts. When I saw this topic, I was hoping it would
be about a structure that remembers insertion order. Now if you
drafted a pep on THAT, I would stand behind it.



From ndbecker2 at gmail.com  Thu Sep 27 19:57:03 2007
From: ndbecker2 at gmail.com (Neal Becker)
Date: Thu, 27 Sep 2007 19:57:03 -0400
Subject: getopt with negative numbers?
References: <1190913250.198794.269530@k79g2000hse.googlegroups.com>
	<fdgpic$ssu$00$1@news.t-online.com>
	<1190915197.390247.313590@57g2000hsv.googlegroups.com>
	<fdgri5$ssu$00$2@news.t-online.com>
	<mailman.1182.1190917341.2658.python-list@python.org>
	<1190930134.780005.68510@22g2000hsm.googlegroups.com>
Message-ID: <fdhg14$74e$1@sea.gmane.org>

Casey wrote:

> On Sep 27, 2:21 pm, "J. Clifford Dyer" <j... at sdf.lonestar.org> wrote:
>> If you can access the argument list manually, you could scan it for a
>> negative integer, and then insert a '--' argument before that,
>> if needed, before passing it to getopt/optparse.  Then you wouldn't have
>> to worry about it on the command line.
>>
>> Cheers,
>> Cliff
> 
> Brilliant!
> 
> <code>
>     # Look for the first negative number (if any)
>     for i,arg in enumerate(sys.argv[1:]):
>         # stop if
>         if arg[0] != "-": break
>         # if a valid number is found insert a "--" string before it
> which
>         # explicitly flags to getopt the end of options
>         try:
>             f = float(arg)
>             sys.argv.insert(i+1,"--")
>             break;
>         except ValueError:
>             pass
> </code>
> 

One person's "brilliant" is another's "kludge".



From adurdin at gmail.com  Tue Sep 25 06:13:10 2007
From: adurdin at gmail.com (Andrew Durdin)
Date: Tue, 25 Sep 2007 11:13:10 +0100
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
Message-ID: <59e9fd3a0709250313v76a7626dn69908b39e4ba100b@mail.gmail.com>

On 9/25/07, Mark Summerfield <m.n.summerfield at googlemail.com> wrote:
>
>     Since the sorteddict's data is always kept in key order, indexes
>     (integer offsets) into the sorteddict make sense.  Five additional
>     methods are proposed to take advantage of this:
>
>     key(index : int) -> value
>
>     item(index : int) -> (key, value)
>
>     value(index : int) -> key
>
>     set_value(index : int, value)
>
>     delete(index : int)

But what about using non-sequential integer keys (something I do quite often)?

e.g. sorteddict({1:'a', 3:'b': 5:'c', 99:'d'})[3]  should return 'b', not 'd'.

Andrew


From jcd at sdf.lonestar.org  Thu Sep 27 14:21:46 2007
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Thu, 27 Sep 2007 14:21:46 -0400
Subject: getopt with negative numbers?
In-Reply-To: <fdgri5$ssu$00$2@news.t-online.com>
References: <1190913250.198794.269530@k79g2000hse.googlegroups.com>
	<fdgpic$ssu$00$1@news.t-online.com>
	<1190915197.390247.313590@57g2000hsv.googlegroups.com>
	<fdgri5$ssu$00$2@news.t-online.com>
Message-ID: <20070927182146.GA6026@sdf.lonestar.org>

If you can access the argument list manually, you could scan it for a negative integer, and then insert a '--' argument before that, if needed, before passing it to getopt/optparse.  Then you wouldn't have to worry about it on the command line. 

Cheers,
Cliff

On Thu, Sep 27, 2007 at 08:08:05PM +0200, Peter Otten wrote regarding Re: getopt with negative numbers?:
> 
> Casey wrote:
> 
> > On Sep 27, 1:34 pm, Peter Otten <__pete... at web.de> wrote:
> >> optparse can handle options with a negative int value; "--" can be used
> >> to signal that no more options will follow:
> > 
> > Thanks, Peter.  getopt supports the POSIX "--" end of options indicator
> > as well, but that seems a little less elegant than being able to simply
> > set a value that tells the parser "I don't use any numeric values as
> > options, and I want to allow negative values as arguments".  At the
> > parser level implemening this would be trivial and I frankly was hoping
> > it had been implemented and it just wasn't mentioned in the spares
> > Python getopt library reference.
> 
> After a quick glance into the getopt and optparse modules I fear that both
> hardcode the "if it starts with '-' it must be an option" behaviour.
> 
> Peter
> -- 
> http://mail.python.org/mailman/listinfo/python-list


From nospam.please at alum.com  Wed Sep  5 03:30:18 2007
From: nospam.please at alum.com (n o s p a m p l e a s e)
Date: Wed, 05 Sep 2007 00:30:18 -0700
Subject: Calling a dos batch file from python
In-Reply-To: <1188918114.131796.302250@19g2000hsx.googlegroups.com>
References: <1188913362.279426.290370@r34g2000hsd.googlegroups.com>
	<1188918114.131796.302250@19g2000hsx.googlegroups.com>
Message-ID: <1188977418.033333.68990@y42g2000hsy.googlegroups.com>

On Sep 4, 5:01 pm, kyoso... at gmail.com wrote:
> On Sep 4, 8:42 am, n o s p a m p l e a s e <nospam.ple... at alum.com>
> wrote:
>
> > Suppose I have a batch file called mybatch.bat  and I want to run it
> > from a python script. How can I call this batch file in python script?
>
> > Thanx/NSP
>
> The subprocess module should work.
>
Thanx to all those who responded. It was quite simple.

import os
os.system("mybatch.bat")

NSP



From apardon at forel.vub.ac.be  Fri Sep 14 07:46:14 2007
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 14 Sep 2007 11:46:14 GMT
Subject: An ordered dictionary for the Python library?
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<7xzlzrtrjn.fsf@ruckus.brouhaha.com>
	<1189664832.876539.86800@k79g2000hse.googlegroups.com>
	<7xps0mmig9.fsf@ruckus.brouhaha.com>
	<1189733708.659317.83950@y42g2000hsy.googlegroups.com>
	<1189753968.917636.310120@19g2000hsx.googlegroups.com>
	<slrnfekm8t.spv.apardon@rcpc42.vub.ac.be>
	<1189767415.814718.312870@k79g2000hse.googlegroups.com>
Message-ID: <slrnfekt46.spv.apardon@rcpc42.vub.ac.be>

On 2007-09-14, Mark Summerfield <m.n.summerfield at googlemail.com> wrote:
> On 14 Sep, 10:49, Antoon Pardon <apar... at forel.vub.ac.be> wrote:
>> > # some time later
>> > d["e"] = 15
>> > # later still
>> > d["b"] = 70
>> > d.keys() # returns ['a', 'b', 'e', 'm', 'x']
>> > d.values() # returns [1, 70, 15, 4, 20]
>>
>> which seems to be exactly what my avltree module mentioned earlier
>> provides.
>>
>> >>> from avltree import Tree
>> >>> d=Tree(a=1, x=20, b=35, m=4)
>> >>> d["e"] = 15
>> >>> d["b"] = 70
>> >>> d.keys()
>>
>> ['a', 'b', 'e', 'm', 'x']>>> d.values()
>>
>> [1, 70, 15, 4, 20]
>
> Antoon,
>
> Your AVL tree looks impressive (although it has five times the lines
> of my ordereddict), but it does not appear to support dict.update()'s
> API (which was extended in 2.4), so you can't do: avl.update({'g':
> 20}, a=9, b=22).

It is true that I didn't follow up the API difference made to dict
since I wrote the module, but I think these are rather minor.
I don't think it would take a lot of work to correct these.

> Also, it does not provide the key(), value(), and item() methods that
> the API I proposed can support (because in an ordereddict, index
> positions make sense).

At the time I wrote my module I never had a need for these. Do you have
a use case or is it a consideration of completeness that makes you want
these? Maybe I can take a look in how to implement this, but at this
moment it doesn't sound that usefull to me.

On the other hand your API doesn't seem to allow for iterating over only
a part of the keys. Supposing all keys are strings, I can easily iterate
over all keys that start with an 'n' or with any arbitrary prefix.
That IMO seems more usefull.

> If there was consensus on an API and you, me, and others had different
> implementations, we could always come up with some tests to compare
> their relative performance, and put the fastest one(s) forward in a
> PEP. (I don't care if my own code is used or not, it is the
> functionality in Python's standard library that I want, whoever's code
> it is.)

Good luck on finding that consensus. If you really want this I fear you
will have to start writing that PEP before a consensus is reached and
hope to find a proposal that will be acceptable to the majority and
especially the BDFL.

-- 
Antoon Pardon


From m.n.summerfield at googlemail.com  Fri Sep 14 09:56:31 2007
From: m.n.summerfield at googlemail.com (Mark Summerfield)
Date: Fri, 14 Sep 2007 13:56:31 -0000
Subject: An ordered dictionary for the Python library?
In-Reply-To: <slrnfekt46.spv.apardon@rcpc42.vub.ac.be>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<7xzlzrtrjn.fsf@ruckus.brouhaha.com>
	<1189664832.876539.86800@k79g2000hse.googlegroups.com>
	<7xps0mmig9.fsf@ruckus.brouhaha.com>
	<1189733708.659317.83950@y42g2000hsy.googlegroups.com>
	<1189753968.917636.310120@19g2000hsx.googlegroups.com>
	<slrnfekm8t.spv.apardon@rcpc42.vub.ac.be>
	<1189767415.814718.312870@k79g2000hse.googlegroups.com>
	<slrnfekt46.spv.apardon@rcpc42.vub.ac.be>
Message-ID: <1189778191.529829.293320@19g2000hsx.googlegroups.com>

On 14 Sep, 12:46, Antoon Pardon <apar... at forel.vub.ac.be> wrote:
> On 2007-09-14, Mark Summerfield <m.n.summerfi... at googlemail.com> wrote:
>
>
>
> > On 14 Sep, 10:49, Antoon Pardon <apar... at forel.vub.ac.be> wrote:
> >> > # some time later
> >> > d["e"] = 15
> >> > # later still
> >> > d["b"] = 70
> >> > d.keys() # returns ['a', 'b', 'e', 'm', 'x']
> >> > d.values() # returns [1, 70, 15, 4, 20]
>
> >> which seems to be exactly what my avltree module mentioned earlier
> >> provides.
>
> >> >>> from avltree import Tree
> >> >>> d=Tree(a=1, x=20, b=35, m=4)
> >> >>> d["e"] = 15
> >> >>> d["b"] = 70
> >> >>> d.keys()
>
> >> ['a', 'b', 'e', 'm', 'x']>>> d.values()
>
> >> [1, 70, 15, 4, 20]
>
> > Antoon,
>
> > Your AVL tree looks impressive (although it has five times the lines
> > of my ordereddict), but it does not appear to support dict.update()'s
> > API (which was extended in 2.4), so you can't do: avl.update({'g':
> > 20}, a=9, b=22).
>
> It is true that I didn't follow up the API difference made to dict
> since I wrote the module, but I think these are rather minor.
> I don't think it would take a lot of work to correct these.

I'm sure you're right.

> > Also, it does not provide the key(), value(), and item() methods that
> > the API I proposed can support (because in an ordereddict, index
> > positions make sense).
>
> At the time I wrote my module I never had a need for these. Do you have
> a use case or is it a consideration of completeness that makes you want
> these? Maybe I can take a look in how to implement this, but at this
> moment it doesn't sound that usefull to me.

I put them in for completeness, although in some contexts I have found
the ability to ask for the n-th item to be v. useful.

> On the other hand your API doesn't seem to allow for iterating over only
> a part of the keys. Supposing all keys are strings, I can easily iterate
> over all keys that start with an 'n' or with any arbitrary prefix.
> That IMO seems more usefull.

That is an appealing feature---but I don't want to make any assumption
about keys (they could be ints, id()s, strs, or anything that is
acceptable to a dict.

There's nothing to stop you creating a PEP for your AVL tree---I'd
certainly be glad for one to be in the collections module. I'm not
advocating "only one" ordered data structure, but rather one
particular one---and I certainly hope the collections module will have
several eventually, and that other people will propose PEPs for other
data structures, such as AVL trees, B*Trees, skiplists, etc., since
all have something to offer.

> > If there was consensus on an API and you, me, and others had different
> > implementations, we could always come up with some tests to compare
> > their relative performance, and put the fastest one(s) forward in a
> > PEP. (I don't care if my own code is used or not, it is the
> > functionality in Python's standard library that I want, whoever's code
> > it is.)
>
> Good luck on finding that consensus. If you really want this I fear you
> will have to start writing that PEP before a consensus is reached and
> hope to find a proposal that will be acceptable to the majority and
> especially the BDFL.

I don't expect my API to satisfy everyone, but by making it as close
to what exists already, i.e., a dict, yet with keys that "happen" to
be ordered (and offering a few extra methods to help users exploit
that if they want), I am hoping this will make it more likely to be
acceptable.




From steve at REMOVE-THIS-cybersource.com.au  Fri Sep  7 23:28:00 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sat, 08 Sep 2007 03:28:00 -0000
Subject: exponential float formmating
References: <1189170499.945175.275210@57g2000hsv.googlegroups.com>
	<5kd2q6F31i6hU4@mid.uni-berlin.de>
Message-ID: <13e45m0dtpa5s53@corp.supernews.com>

On Fri, 07 Sep 2007 13:42:30 +0000, Marc 'BlackJack' Rintsch wrote:

> On Fri, 07 Sep 2007 06:08:19 -0700, zunbeltz wrote:
> 
>> For compatibility reasons with an old program I have to format string
>> in exponential format with the following format
>> 
>> 0.xxxxxE-yy
>> 
>> This means that the number start always by 0 and after the exponent
>> there should be alway the sing and 2 number for the exponent.
>> 
>> for example 13 shoud be 0.13000E+02
>> I always get 1.30000E001
> 
> I don't know if this is platform dependent but this works for me:
> 
> In [41]: '%e' % 1.3
> Out[41]: '1.300000e+00'
> 
> In [42]: ('%e' % 1.3).upper()
> Out[42]: '1.300000E+00'

Alas, you've missed the Original Poster's requirement that the formatted 
number always starts with 0.

Also, an easier way to format floats with a capital E is to use %E 
instead of %e.

I don't believe there is a standard way of formatting floats with a 
leading zero.


-- 
Steven.


From Wiseman1024 at gmail.com  Wed Sep 26 09:40:44 2007
From: Wiseman1024 at gmail.com (Miguel Perez)
Date: Wed, 26 Sep 2007 13:40:44 -0000
Subject: My tail call optimizing decorator
Message-ID: <1190814044.910422.240920@o80g2000hse.googlegroups.com>

Please critique this tail call optimizing decorator I've written. I've
tried to fix the pitfalls of other proposed decorators, and the result
is this one that supports mutual recursion, does not use exceptions,
stack inspection or any implementation-dependent hack, and is pretty
short and fast - the fastest out of the ones I could find and try. In
fact, in tail-recursive environments I tested the impact of using the
decorator is difficult to even measure, as the extra time the
decorator takes to run is probably saved by the better use of cache
memory. The only caveat is that if used in a function that's not
called in a tail-recursive fashion, bad things will happen.

def tailcall(f):
	'''Decorator that implements tail call optimization.

	Supports cooperative tail call - even when only one of the functions
is
	decorated, and all exceptions pass through it. You can tell the
functions
	that have been tail optimized because they have "tco" before them in
the
	stack frame.

	The only caveat is that if you attempt to decorate a function that
isn't
	called in a tail recursive fashion from another decorated function,
you'll
	get wrong results.'''
	tdata = [False] #[Optimizing?]
	DO_CALL = object() #Call marker
	def tco(*a, **aa):
		if tdata[0]:
			return DO_CALL, a, aa
		else:
			tdata[0] = True
			ret = f(*a, **aa)
			while type(ret) is tuple and ret and ret[0] is DO_CALL:
				ret = f(*ret[1], **ret[2])
			tdata[0] = False
			return ret
	tco.__doc__ = f.__doc__
	return tco



From bj_666 at gmx.net  Tue Sep 18 17:09:43 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 18 Sep 2007 21:09:43 GMT
Subject: How do you limit the # of lines Read?
References: <1190149187.799482.151320@19g2000hsx.googlegroups.com>
Message-ID: <5lat4nF71rf0U3@mid.uni-berlin.de>

On Tue, 18 Sep 2007 13:59:47 -0700, koutoo wrote:

> I am working on a loop for my code and was wondering if there is a way
> to limit the number of lines read through?  I'd hate to cut the test
> file in order to run the code in the testing phase.  Can you add a
> value in the parenthesis of the readline() function?
> 
> t = string.readline()  # Limit this somehow?

Do you want to limit how much of *one* line is read or the number of lines!?

The latter can be done with `itertools.islice()`.

Ciao,
	Marc 'BlackJack' Rintsch


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Sep 24 11:26:38 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 24 Sep 2007 17:26:38 +0200
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <1190645954.381931.187210@y42g2000hsy.googlegroups.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<Bgv*HjvVr@news.chiark.greenend.org.uk>
	<46f79c75$0$30457$426a34cc@news.free.fr>
	<1190645954.381931.187210@y42g2000hsy.googlegroups.com>
Message-ID: <46f7d71a$0$17837$426a74cc@news.free.fr>

NickC a ?crit :
> On Sep 24, 9:16 pm, Bruno Desthuilliers <bruno.
> 42.desthuilli... at wtf.websiteburo.oops.com> wrote:
>> Matthew Woodcraft a ?crit :
>>> One reason for the different syntax is that functions, unlike most
>>> other objects, know their own names (which can be shown in tracebacks
>>> and the like).
>> Nope. They know *one* of their names - the one they've been given when
>> first instanciated. Which may or not be the name used to get at them...
> 
> That's exactly the point - a function may be given many names through
> the assignment statement, just like any other data value. However, the
> *first* name given to a function (the one in the def statement) is
> special, as that is the name the function knows *itself* by.
> 
"knows itself by" ? Really ?-)

 >>> def toto(level):
...     print "toto %s" % level
...     if level == 0: print "done"
...     else: toto(level-1)
...
 >>> toto(3)
toto 3
toto 2
toto 1
toto 0
done
 >>> tutu = toto
 >>> def toto(level):
...     print "YADDA YADDA"
...
 >>> tutu(3)
toto 3
YADDA YADDA
 >>>


> While a function *can* be treated like any other piece of data once
> you have a reference to one, the original statement does a lot more
> than a normal assignment does:

Indeed. But :

>   - being within the scope of a function significantly alters name
> binding and lookup

Runtime stuff and 'locals' parameters of te function object initializer 
AFAICT.

>   - return statements and yield statements are meaningful only within
> the scope of a function

s/"within the scope"/"in the code object"/, I'd say... Look at the 
signature of the function object's initializer, it takes a code object.

Please some guru correct me if I'm wrong, but AFAICT, you can have all 
this working without the def statement itself (even if it's quite enough 
of a boring work to justify the existence of the def statement).

Anyway, the OP suggestion was to turn the statement into an expression 
(? la javascript), not to get rid of it.

>   - you can attach decorators to a function definition

@decorators are just syntactic sugar for HOFs. If you want to apply a 
decorator do a lambda, you don't need this syntax - just pass the lambda 
as a param to the decorator.

>   - you can include a docstring in a function definition

And you can add it afterwards too:

>>> toto.__doc__ is None
True
>>> toto.__doc__ = "yadda"
>>> toto.__doc__
'yadda'


Don't get me wrong, I'm not saying the def statement is useless. Just 
that the reasons why this statement exists have very few to do with your 
arguments here.


From ricaraoz at gmail.com  Sat Sep  8 22:04:15 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Sat, 08 Sep 2007 23:04:15 -0300
Subject: include myVar
Message-ID: <46E3549F.1000503@bigfoot.com>

Is there a way to import a module whose name is in a variable (read from
a configuration file for example)?

TIA


From http  Sun Sep 16 12:25:10 2007
From: http (Paul Rubin)
Date: 16 Sep 2007 09:25:10 -0700
Subject: generate list of partially accumulated values
References: <1189936564.932553.148800@50g2000hsm.googlegroups.com>
Message-ID: <7xveaao9w9.fsf@ruckus.brouhaha.com>

cesco <fd.calabrese at gmail.com> writes:
> I have the following list:
> l = [1, 2, 3, 4]
> and I'd like to obtain a list like the following:
> l_partial_sum = [1, 3, 6, 10] (that is [1, 1+2, 1+2+3, 1+2+3+4])
> 
> Is there a simple way to accomplish this?

I won't show explicit code since you are apparently asking a homework
question.  But Python style tends to prefer doing this sort of thing
imperatively, possibly using generator functions.


From stefan.behnel-n05pAM at web.de  Wed Sep 26 07:32:11 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Wed, 26 Sep 2007 13:32:11 +0200
Subject: elementtree question
In-Reply-To: <fd8p68$bf5$1@foggy.unx.sas.com>
References: <fd0lmi$pm8$1@foggy.unx.sas.com> <46F76F86.6010307@web.de>
	<fd8p68$bf5$1@foggy.unx.sas.com>
Message-ID: <46FA433B.2020407@web.de>

Tim Arnold wrote:
> Thanks for the great answers--I learned a lot. I'm looking forward to the ET 
> 1.3 version.

Note that there is a difference in behaviour, though. lxml.etree forces
Elements to be uniquely positioned in a tree, so the code I posted relies on
the "side effect" of automatically removing an Element from the old position
when inserting it at a different place. ElementTree does not do that, so this
code is not portable between the two libraries.

Stefan


From duncan.booth at invalid.invalid  Mon Sep 24 06:57:04 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 24 Sep 2007 10:57:04 GMT
Subject: Would Anonymous Functions Help in Learning Programming/Python?
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<mailman.900.1190414696.2658.python-list@python.org>
	<1190415741.380795.259050@y42g2000hsy.googlegroups.com>
	<mailman.904.1190418441.2658.python-list@python.org>
	<1190419720.811685.145880@r29g2000hsg.googlegroups.com>
	<46f6eb3d$0$32060$426a34cc@news.free.fr>
	<1190606861.982113.25240@d55g2000hsg.googlegroups.com>
	<46f786cc$0$8901$426a74cc@news.free.fr>
	<5lpgfuF95s07U3@mid.uni-berlin.de>
	<mailman.974.1190629159.2658.python-list@python.org>
Message-ID: <Xns99B5798FA59CEduncanbooth@127.0.0.1>

Carsten Haese <carsten at uniqsys.com> wrote:

> It comes from the 'new' module:
> 
>>>> import new
>>>> help(new.function)
> Help on class function in module __builtin__:
> ...
> 
> Oddly enough, the help misrepresents which module the function is coming
> from.

No, I don't think it is misrepresenting anything. The 'new' module simply 
exposes names for some things which don't otherwise  have names, none of 
the types accessible through that module are actually defined there.

The class 'function' is a builtin definition, but by default it isn't bound 
to any name accessible to the Python interpreter. If you do:

>>> def f(): pass

>>> type(f).__module__
'__builtin__'
>>> help(type(f))
Help on class function in module __builtin__:
... etc ...

then the help makes a bit more sense.



From cscheit at lstm.uni-erlangen.de  Tue Sep 18 11:24:46 2007
From: cscheit at lstm.uni-erlangen.de (Christoph Scheit)
Date: Tue, 18 Sep 2007 17:24:46 +0200
Subject: Memory Problem
In-Reply-To: <op.tyutklkdx6zn5v@a98gizw.cpe.telecentro.net.ar>
References: <mailman.710.1190118615.2658.python-list@python.org>
	<200709181558.43026.cscheit@lstm.uni-erlangen.de>
	<op.tyutklkdx6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <200709181724.46141.cscheit@lstm.uni-erlangen.de>

Hi, Thank you all very much,

so I will consider using a database. Anyway I would like
how to detect cycles, if there are.

> >> >  # add row i and increment number of rows
> >> >  self.rows.append(DBRow(self, self.nRows))
> >> >  self.nRows += 1
>
> This looks suspicious, and may indicate that your structure contains
> cycles, and Python cannot always recall memory from those cycles, and you
> end using much more memory than needed.
>
> --
> Gabriel Genellina

How can I detect if there are cycles?

self.rows is a list containing DBRow-objects,
each itself being an integer pointer (index) to the i-th row.
Im using this list in order to sort the table by sorting the index-list
instead of realy sorting the entries. (or to filter).

-- 

============================
M.Sc. Christoph Scheit
Institute of Fluid Mechanics
FAU Erlangen-Nuremberg
Cauerstrasse 4
D-91058 Erlangen
Phone: +49 9131 85 29508
============================


From pixellee at 163.com  Sat Sep 15 23:49:44 2007
From: pixellee at 163.com (pixellee)
Date: Sun, 16 Sep 2007 03:49:44 +0000 (UTC)
Subject: Python & Blend or Maya
Message-ID: <fci94m$u2u$1@news.cn99.com>

Anybody introdcing something on the subject?


From wizzardx at gmail.com  Thu Sep 20 17:24:13 2007
From: wizzardx at gmail.com (David)
Date: Thu, 20 Sep 2007 23:24:13 +0200
Subject: subprocess: returncode v. poll()
In-Reply-To: <1190316490.165848.248300@w3g2000hsg.googlegroups.com>
References: <1190315820.532320.26570@22g2000hsm.googlegroups.com>
	<1190316312.929039.85670@o80g2000hse.googlegroups.com>
	<1190316490.165848.248300@w3g2000hsg.googlegroups.com>
Message-ID: <18c1e6480709201424s5e92fbfoee2cf53a57bb76de@mail.gmail.com>

On 9/20/07, 7stud <bbxx789_05ss at yahoo.com> wrote:
> On Sep 20, 1:25 pm, 7stud <bbxx789_0... at yahoo.com> wrote:
> > On Sep 20, 1:17 pm, 7stud <bbxx789_0... at yahoo.com> wrote:
> >
> >
> >
> > > Hi,
> >
> > > What is the difference between:
> >
> > > 1) getting the returncode directly from the subprocess object
> > > 2) calling poll() on the subprocess object?
> >
> > > Here is an example:
> >
> > > import subprocess
> >
> > > p = subprocess.Popen("ls", stdout=subprocess.PIPE)
> > > print p.returncode
> > > print p.poll()
> > > print
> >
> > > print p.stdout.read()[:5]
> > > print
> >
> > > print p.returncode
> > > print p.poll()
> > > print p.returncode
> >
> > > --output:--
> > > None
> > > None
> >
> > > 10tes
> >
> > > None
> > > 0
> > > 0
> >
> > Hmm....after a little more testing, I don't think returncode
> > dynamically updates:
> >
> > import subprocess
> > import time
> >
> > p = subprocess.Popen("ls", stdout=subprocess.PIPE)
> >
> > print p.returncode
> > time.sleep(5)
> > print p.returncode
> > time.sleep(2)
> > print p.returncode
> >
> > print p.stdout.read()[:5]
> > print p.returncode
> >
> > --output:--
> > None
> > None
> > None
> > 10tes
> > None
>
> ...but then when is p.returncode set?  And what good is it?

AFAICT p.returncode is only set by Popen methods. It doesn't
automatically get set by the OS internals that manage the actual
process.

One place where it is useful is when using Popen's communicate()
method, which returns (stdout,stderr), but not the return code. Also
it lets you call poll() but not have to save poll()'s return value.


From gagsl-py2 at yahoo.com.ar  Wed Sep  5 21:55:51 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 05 Sep 2007 22:55:51 -0300
Subject: So what exactly is a complex number?
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
	<mailman.212.1188576194.28954.python-list@python.org>
	<451mq4-les.ln1@ozzie.tundraware.com>
	<mailman.266.1188644067.28954.python-list@python.org>
	<lbjpq4-eo22.ln1@ozzie.tundraware.com>
	<mailman.310.1188805355.28954.python-list@python.org>
	<1188821241.516029.229020@o80g2000hse.googlegroups.com>
	<46DE7AB9.9000702@wp.pl>
Message-ID: <op.tx7mbdidx6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 05 Sep 2007 06:45:29 -0300, Grzegorz S?odkowicz <jergosh at wp.pl>  
escribi?:

> I believe vectors can only be added if they have the same point of
> application. The result is then applied to the same point.

You are talking about "forces", not "vectors" in general. Using the "point  
of application" is just a convenient way of condensing two things: the  
resultant force -a vector- and the resultant momentum -a pseudovector-  
into a single entity, and only makes sense for a rigid body.

-- 
Gabriel Genellina



From dstanek at dstanek.com  Thu Sep  6 15:03:38 2007
From: dstanek at dstanek.com (David Stanek)
Date: Thu, 6 Sep 2007 15:03:38 -0400
Subject: Getting original working directory
In-Reply-To: <1658.1882-17889-1055570935-1189104422@seznam.cz>
References: <fbpgvn$sa6$1@sea.gmane.org>
	<1658.1882-17889-1055570935-1189104422@seznam.cz>
Message-ID: <de32cc030709061203u1605da6ep206ed7629090cab1@mail.gmail.com>

On 9/6/07, rave247 rave247 <rave247 at seznam.cz> wrote:
>
> If I could use os.getcwd() or save the value to some variable before
> calling os.chdir() I would do it, believe me. However I can't because it
> is the part of code where I can't do any changes.


Why is it not possible. If nothing else create a new module that does the
os.getcwd() then call the module that you cannot change.

Also I do not agree that such thing is not possible because after python
> script finishes its work, it naturally gets back into the original location
> from where you started the script (in shell you are in the original location
> after script finishes). So this information has to be stored somewhere
> (probably in shell which runs the interpreter) and there *must*  be a way
> how to get it. Simply after calling os.chdir() the original value doen't
> disappear, I think it just needs some nice hack if python doesn't provide a
> way how to get it.
>

The shell is back to where it started for a very different reason. I won't
go into it, because it's not about Python. However, if you know what shell
you will *always* be using to run the script, then there may be a way. Bash,
for example, will have the path where you were when the script started in
os.environ['PWD']. I suspect most shells have something similar.


David
--
http://www.traceback.org
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From mcl.office at googlemail.com  Fri Sep  7 10:39:46 2007
From: mcl.office at googlemail.com (mcl)
Date: Fri, 07 Sep 2007 07:39:46 -0700
Subject: MySQLdb: ValueError Something Stupid
In-Reply-To: <mailman.218.1189170695.2658.python-list@python.org>
References: <1189163332.990248.134080@d55g2000hsg.googlegroups.com>
	<1189169527.020589.185120@w3g2000hsg.googlegroups.com>
	<mailman.218.1189170695.2658.python-list@python.org>
Message-ID: <1189175986.343368.221520@d55g2000hsg.googlegroups.com>

On 7 Sep, 14:11, Carsten Haese <cars... at uniqsys.com> wrote:
> On Fri, 2007-09-07 at 05:52 -0700, mcl wrote:
> > > ValueError: invalid literal for int(): 0-
> > >       args = ('invalid literal for int(): 0-',)
>
> > > =========================================
> > > Thanks Richard
>
> > Sort of solved it.
>
> > On that particular table it did not like * for all fields.
>
> > Any reason why that would be the case ?
>
> None that we can divine without more information. What's the schema for
> the table in question, which column(s) are you excluding to make the
> query work, and what kind of data is in the column(s) you're excluding?
>
> --
> Carsten Haesehttp://informixdb.sourceforge.net

Thanks for replying.

I did not exclude any columns and the Schema is:

CREATE TABLE lstData (
  qlCat varchar(20) NOT NULL default '',
  qlTitle varchar(255) NOT NULL default '',
  qlSubTitle varchar(255) default NULL,
  qlDetails text,
  qlPic varchar(20) default NULL,
  qlPostCode varchar(16) default NULL,
  qlUpd timestamp NOT NULL default '0000-00-00 00:00:00' on update
CURRENT_TIMESTAMP,
  KEY `idx-qlCat` (qlCat)
) ENGINE=MyISAM DEFAULT CHARSET=latin1;

Thanks again

Richard



From paul.hankin at gmail.com  Tue Sep 25 11:39:00 2007
From: paul.hankin at gmail.com (Paul Hankin)
Date: Tue, 25 Sep 2007 15:39:00 -0000
Subject: Clustering text-documents in bundles
In-Reply-To: <1190733093.110073.101460@k79g2000hse.googlegroups.com>
References: <1190733093.110073.101460@k79g2000hse.googlegroups.com>
Message-ID: <1190734740.508174.216190@22g2000hsm.googlegroups.com>

On Sep 25, 4:11 pm, "exhuma.twn" <exh... at gmail.com> wrote:
> Is it possible to calculate a distance between two chunks of text? I
> suppose one could simply do a simple word-count on the chunks
> (removing common noise words of course). And then go from there. Maybe
> even assigning different weighting to words. But maybe there is a well-
> tested and useful algorithm already available?

A good distance between two chunks of text is the number of changes
you have to make to one to transform it to the other. You should look
at 'difflib' with which you should be able to code up this sort of
distance (although the details will depend just on what your text
looks like).

--
Paul Hankin



From splifingate at gmail.com  Fri Sep  7 18:58:14 2007
From: splifingate at gmail.com (ah)
Date: Fri, 07 Sep 2007 18:58:14 -0400
Subject: What does this thread have to do with classical music,
In-Reply-To: <200820071919337538%erfc@caballista.org>
References: <7nnh7350b5h25ghocra72b23mmsnnkj8bh@4ax.com>
	<4694e124$0$97214$892e7fe2@authen.yellow.readfreenews.net>
	<46957ef1$0$10227$8f2e0ebb@news.shared-secrets.com>
	<46963170$0$97261$892e7fe2@authen.yellow.readfreenews.net>
	<46981df7$0$12095$8f2e0ebb@news.shared-secrets.com>
	<46990784$0$97223$892e7fe2@authen.yellow.readfreenews.net>
	<4699297c$0$4706$4c368faf@roadrunner.com>
	<140720071431044860%erfc@caballista.org>
	<46a3a1a7$0$15115$8f2e0ebb@news.shared-secrets.com>
	<220720072148091069%erfc@caballista.org>
	<46a5385d$0$4832$8f2e0ebb@news.shared-secrets.com>
	<250720071834457296%erfc@caballista.org>
	<46aceaa5$0$13281$8f2e0ebb@news.shared-secrets.com>
	<290720071853200863%erfc@caballista.org>
	<46b12539$0$4807$8f2e0ebb@news.shared-secrets.com>
	<010820072033374341%erfc@caballista.org>
	<46c63474$0$4844$8f2e0ebb@news.shared-secrets.com>
	<180820070841431634%erfc@caballista.org>
	<46c90727$0$14433$8f2e0ebb@news.shared-secrets.com>
	<200820071919337538%erfc@caballista.org>
Message-ID: <46e1d2a4$0$5075$8f2e0ebb@news.shared-secrets.com>

Art Deco wrote:
> ah <splifingate at gmail.com> wrote:
>>Art Deco wrote:
>>> ah <splifingate at gmail.com> wrote:
>>>>Art Deco wrote:
>>>>> ah <splifingate at gmail.com> wrote:
>>>>>>Art Deco wrote:
>>>>>>> ah <splifingate at gmail.com> wrote:
>>>>>>>>Art Deco wrote:
>>>>>>>>> ah <splifingate at gmail.com> wrote:
>>>>>>>>>>Art Deco wrote:
>>>>>>>>>>> ah <splifingate at gmail.com> wrote:
>>>>>>>>>>>>Art Deco wrote:
>>>>>>>>>>>>> Who wrote?
>>>>>>>>>>>>> 
>>>>>>>>>>>>> 
>>>>>>>>>>>>>>What does that have to do with classical music, snuhwolf?
>>>>>>>>>>>>> 
>>>>>>>>>>>>>>What does that have to do with classical music, snuhwolf?
>>>>>>>>>>>>> 
>>>>>>>>>>>>> How many more times will you be asking the same tired, lame
>>>>>>>>>>>>> questions,
>>>>>>>>>>>>> Tholen?
>>>>>>>>>>>>
>>>>>>>>>>>>Till 2056?
>>>>>>>>>>> 
>>>>>>>>>>> At that point, he will have made the Thirty Years Pset War look like
>>>>>>>>>>> 1967 in the Sinai.
>>>>>>>>>>
>>>>>>>>>>It must have been Hell to keep a garden during those times.
>>>>>>>>>>
>>>>>>>>>>Did they all eat jerky, or what?
>>>>>>>>> 
>>>>>>>>> Worse -- worm-laden hardtack.
>>>>>>>>
>>>>>>>>Luxury!
>>>>>>>>
>>>>>>>>Why, I remember when I was a lad . . . we used to watch the local churls
>>>>>>>>across the fences eating that well.
>>>>>>>>
>>>>>>>>We only had millings (and (occasionally) water) on Tuesdays and Fridays.
>>>>>>> 
>>>>>>> Grog and hardtack, life is good!
>>>>>>
>>>>>>?Viva la basura!
>>>>> 
>>>>> Vivat les ordures!
>>>>
>>>>Vivara los trunctiato!
>>> 
>>> das Leben ist gut!
>>
>>de Handel esta disgustipado!
> 
> la vita ? buona!

que grupo da merda!


From mouseit101 at gmail.com  Fri Sep 14 23:25:27 2007
From: mouseit101 at gmail.com (mouseit)
Date: Sat, 15 Sep 2007 03:25:27 -0000
Subject: List append
Message-ID: <1189826727.204061.310380@d55g2000hsg.googlegroups.com>

I'm trying to add an element to a list which is a property of an
object, stored in an array. When I append to one element, all of the
lists are appended!

Example Code:

class Test:
    array = []

myTests = [Test() , Test() , Test()]
print len(myTests[1].array)
myTests[0].array.append( 5 )
print len(myTests[1].array)

prints:
0
1

This is probably a really easy question (I'm very new to python), so
thanks in advance for your help!



From cjw at sympatico.ca  Mon Sep 17 17:50:10 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Mon, 17 Sep 2007 17:50:10 -0400
Subject: Python "with"
In-Reply-To: <fck2di$7to$1@ss408.t-com.hr>
References: <fck2di$7to$1@ss408.t-com.hr>
Message-ID: <fcmsr6$7dk$1@sea.gmane.org>

Ivan Voras wrote:
> Hi,
> 
> I'm looking for a construct that's similar to (Turbo) Pascal's "with"
> statement. I read about the Python's new "with" statement, but I was
> dissapointed to learn that it does something different (I still don't
> see how it's better than try..except..finally, but that's not my question).
> 
> Is there something similar to what I want that's Pythonic enough?
> 
> (If you're not familiar with Pascal, here's how it works:
> 
> with some.big.structure.or.nested.objects.element do begin
>      member1 := something;
>      member2 := something;
> end;
> 
> which exactly translates to this equivalent:
> 
> some.big.structure.or.nested.objects.element.member1 := something;
> some.big.structure.or.nested.objects.element.member2 := something;
> 
> i.e. it's a wrist-saver. I think a similar feature exists in C99, for
> structs.
> 
> I know it can be almost always done by using a temporary variable:
> 
> tmp = some.big.structure.or.nested.objects.element
> tmp.member1 = something
> tmp.member2 = something
> 
> but this looks ugly to me.)
> 
> 
The "with" statement in Pascal was a neat feature to use with records.

Unfortunately, in Python 2.5, "with" has a different use.

Colin W.



From luismgz at gmail.com  Mon Sep 24 21:24:39 2007
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M=2E_Gonz=E1lez?=)
Date: Tue, 25 Sep 2007 01:24:39 -0000
Subject: TRying to import files from my folder not pythons lib folder
In-Reply-To: <mailman.969.1190620981.2658.python-list@python.org>
References: <1190395964.541835.114350@50g2000hsm.googlegroups.com>
	<1190396569.732154.234270@r29g2000hsg.googlegroups.com>
	<mailman.883.1190399436.2658.python-list@python.org>
	<1190595699.093793.100960@w3g2000hsg.googlegroups.com>
	<mailman.969.1190620981.2658.python-list@python.org>
Message-ID: <1190683479.660166.217980@r29g2000hsg.googlegroups.com>

On Sep 24, 5:00 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Sun, 23 Sep 2007 22:01:39 -0300, Luis M. Gonz?lez <luis... at gmail.com>
> escribi?:
>
> > This is exactly what I did, but I have a new problem now:
> > After setingPYTHONPATHI'm no longer able to start IDLE from the
> > start menu.
> > It seems the system cannot find the file.
> > But if I eliminatePYTHONPATH, everything works as it used to.
>
> > I setPYTHONPATHbecause I wanted to import any existing file in my
> > desktop without having to use sys.path.append...
> > It works when using the command line but strangely, something get
> > messed up with IDLE.
> > Any hint?
>
> Perhaps a python module in your desktop has a name conflicting with a
> standard module?
>
> - On the Start menu, navigate to the IDLE item, but dont click it.
> - RIGHT click on it, and select Properties. Copy the Destination field.
> Should be something like "C:\Python25\Lib\idlelib\idle.bat"
> - Open a cmd window (console), paste the above text and press Enter.
> - Almost certainly you'll get an error; post here the full error and
> traceback.
>
> --
> Gabriel Genellina

If I paste the destination path in the command window, it simply
disappears before I can read any error message.
If I enter "cmd" and then the destination path, I get this:

C:\Documents and Settings\Administrador>C:\Python25\Lib\idlelib
\idle.bat
El sistema no puede encontrar el archivo idle.pyw.

Any hint?

Luis



From zzbbaadd at aol.com  Fri Sep  7 12:31:28 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Fri, 07 Sep 2007 09:31:28 -0700
Subject: How to determine the bool between the strings and ints?
In-Reply-To: <mailman.227.1189179649.2658.python-list@python.org>
References: <mailman.227.1189179649.2658.python-list@python.org>
Message-ID: <1189182688.290480.102350@o80g2000hse.googlegroups.com>

On Sep 7, 8:40 am, "Jorgen Bodde" <jorgen.maill... at gmail.com> wrote:
> Hi All,
>
> I have a dictionary with settings. The settinfgs can be strings, ints
> or bools. I would like to write this list dynamically to disk in a big
> for loop, unfortunately the bools need to be written as 0 or 1 to the
> config with WriteInt, the integers also with WriteInt and the strings
> with a simple Write.
>
> The list is something like;
>
> options[A] = True
> options[B] = 1
> options[C] = "Hello"
>
> I wanted to use isinstance to determine if it is a bool or an int or a
> string. However I am confused trying it out in the interactive editor;
>
> >>> a = False
> >>> if isinstance(a, bool):
>
> ...     print "OK"
> ...
> OK>>> if isinstance(a, int):
>
> ...     print "OK"
> ...
> OK
>
>
>
> I don't get it. is the bool derived from 'int' in some way? What is
> the best way to check if the config I want to write is an int or a
> bool ?
>
> Regards,
> - Jorgen

This came up in a discussion within the last two weeks but I cannot
find it in a search of google.

It appear that you can get the exact class (as opposed to "is this
class or a derivative" that isinstance() seems to provide)
 with the  __class__ attribute:


>>> a = True
>>> print a.__class__ == bool
True
>>> print a.__class__ == int
False
>>> b = 1
>>> print b.__class__ == int
True
>>> print b.__class__  == bool
False






From zentraders at gmail.com  Tue Sep 11 13:42:53 2007
From: zentraders at gmail.com (Zentrader)
Date: Tue, 11 Sep 2007 17:42:53 -0000
Subject: Car-ac-systems
In-Reply-To: <b0ac48a01b8bb8c9c2b92ff03bf0@msnews.microsoft.com>
References: <cd6dnW0Vf8-wOnvbRVnyhwA@eclipse.net.uk>
	<b0ac48a01b8bb8c9c2b92ff03bf0@msnews.microsoft.com>
Message-ID: <1189532573.728913.306470@g4g2000hsf.googlegroups.com>

<snip>
What is it about "please do not top-post" that you have difficulty
understanding? Or do "MVP"s feel that their time is so much more
valuable than anyone else's that they are free to ignore the norms?

Who made this the norm?  In my travels through web-land, it appears to
be the opposite.  Don't waste space repeating everything in every
post, and it wastes everyone's time by have to go over the same thing
again and again.  Perhaps this thread has a purpose after all, anyway
it has been reported as spam.



From david at asdf.asdf  Wed Sep  5 06:05:15 2007
From: david at asdf.asdf (bambam)
Date: Wed, 5 Sep 2007 20:05:15 +1000
Subject: concise code (beginner)
Message-ID: <13dsvqrqivtf092@corp.supernews.com>

I have about 30 pages (10 * 3 pages each) of code like this
(following). Can anyone suggest a more compact way to
code the exception handling? If there is an exception, I need
to continue the loop, and continue the list.

Steve.

-----------------------------------
for dev in devs
    try:
        dev.read1()
    except
        print exception
        remove dev from devs

for dev in devs
    try:
        dev.read2()
    except
        print exception
        remove dev from devs

for dev in devs
    try:
        dev.read3()
    except
        print exception
        remove dev from devs

etc. 




From kay.schluehr at gmx.net  Fri Sep 28 16:57:13 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Fri, 28 Sep 2007 13:57:13 -0700
Subject: Python 3.0 migration plans?
In-Reply-To: <ns9Li.1172$4V6.1092@newssvr14.news.prodigy.net>
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>
	<%q0Li.725$ih1.539@nlpi068.nbdc.sbc.com>
	<1i555ag.9ez4uvf4583jN%aleax@mac.com>
	<ns9Li.1172$4V6.1092@newssvr14.news.prodigy.net>
Message-ID: <1191013033.145194.193040@50g2000hsm.googlegroups.com>

On 28 Sep., 17:53, John Nagle <na... at animats.com> wrote:
> Alex Martelli wrote:
> > John Nagle <na... at animats.com> wrote:
>
> >> TheFlyingDutchman wrote:
> >>> It seems that Python 3 is more significant for what it removes than
> >>> what it adds.
>
> >>> What are the additions that people find the most compelling?
> >>     I'd rather see Python 2.5 finished, so it just works.
>
> > And I'd rather see peace on Earth and goodwill among men than _either_
> > Python 3 or your cherished "finished" 2.5 -- the comparison and implied
> > tradeoff make about as much sense as yours.
>
>      Insofar as Python has an organization, it's not adequately managing
> extension modules.  Each extension module has its own infrastructure,
> with its own build procedures, its own bug list, and its own maintainers.
> There's not even an archive.  Unlike CPAN, Cheese Shop is just a directory of
> URLs.

John, can't you please piss off?

Thanks, Kay



From ptmcg at austin.rr.com  Sat Sep  1 02:00:34 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Fri, 31 Aug 2007 23:00:34 -0700
Subject: HowTo Use Cython on a Windows XP Box?
In-Reply-To: <1188623610.532790.114000@o80g2000hse.googlegroups.com>
References: <rO3Ci.32$453.27@trndny02>
	<1188618022.208258.15620@22g2000hsm.googlegroups.com>
	<1188623610.532790.114000@o80g2000hse.googlegroups.com>
Message-ID: <1188626434.629725.190080@19g2000hsx.googlegroups.com>

On Sep 1, 12:13 am, John Machin <sjmac... at lexicon.net> wrote:
> On Sep 1, 1:40 pm, Paul McGuire <pt... at austin.rr.com> wrote:
>
>
>
>
>
> > On Aug 31, 9:06 pm, David Lees <debl2NoS... at verizon.net> wrote:
>
> > > August 31, 2007
>
> > > I just downloaded the current Cython release and have no problem running
> > > the cpython.py translator on the demo code.  But when I try compiling, I
> > > get an error complaining that my version of Python (which is the current
> > > 2.5.1 downloaded from python.org) was compiled with Visual C++ 2003.  I
> > > only have Visual C++ 2005 on my machine and am unable to find a download
> > > of 2003 on the Microsoft site (no big surprise).  I have never built
> > > Python from source.  Is it necessary or can someone suggest an alternative?
>
> > > TIA
>
> > > david lees
>
> > Unless you are customizing Python (and you can accomplish a *lot*
> > without doing so), it is not necessary to build Python from source.
> > Download one of the pre-built Windows binaries and install it, or get
> > the Win Python distribution from ActiveState and install that.  Then
> > start writing your own Python demo scripts.
>
> Paul, AFAICT the OP is referring not to CPython, but to Cython, which
> is a Pyrex fork. Seehttp://www.cython.org/
>
> Building CPython from source is likely to be a red herring. The OP's
> question appears to be "How do I, on Windows, compile C code generated
> by Cython into a pyd that will play happily with the standard-issue
> python.exe and python25.dll?", and is probably best directed to one of
> the 3 forums mentioned on the above-referenced page.
>
> HTH,
> John- Hide quoted text -
>
> - Show quoted text -

Thanks, I thought "Cython" was a typo of "CPython".

Glad the OP found a better-informed resource.

-- Paul



From phil at freehackers.org  Mon Sep 17 08:02:38 2007
From: phil at freehackers.org (BlueBird)
Date: Mon, 17 Sep 2007 05:02:38 -0700
Subject: Reading text files where last line has no EOL
In-Reply-To: <mailman.649.1190028577.2658.python-list@python.org>
References: <1190027021.235110.286450@g4g2000hsf.googlegroups.com>
	<mailman.649.1190028577.2658.python-list@python.org>
Message-ID: <1190030558.568678.77370@y42g2000hsy.googlegroups.com>

On 17 sep, 13:24, Steve Holden <st... at holdenweb.com> wrote:
> BlueBird wrote:
> > I tried and failed to read text files where the last line does not
> > contain proper EOL. For my tests, I use a file that I create with the
> > equivalent of :
>
> > open('toto', 'w').write( '1234\n4567\n89AB' )
>
> > My reading code looks like this :
>
> >        l = f.readline()
> >         while len(l):
> >             self.appendLine( l )
> >             l = f.readline()
>
> > The last line is not returned (89AB) is never returned.
>
> > I tried with "for l in f" with similar results.
>
> > I read the doc :
>
> > In order to make a for loop the most efficient way of looping over the
> > lines of a file (a very common operation), the next() method uses a
> > hidden read-ahead buffer. As a consequence of using a read-ahead
> > buffer, combining next() with other file methods (like readline())
> > does not work right. However, using seek() to reposition the file to
> > an absolute position will flush the read-ahead buffer. New in version
> > 2.3.
>
> > I've tried to do a f.seek( f.tell() ) but that did not help.
>
> > So how am I supposed to fetch that last line ?
>
> What version of Python are you using, and on what platform? WJFFM on
> 2.5.1/Cygwin:
>
>  >>> open('toto', 'w').write( '1234\n4567\n89AB' )
>  >>> for l in open('toto'):
> ...   print l
> ...
> 1234
>
> 4567
>
> 89AB
>  >>>
>
> You will observe that the last line is presented, but correctly does not
> include a trailing line feed.
>

Oooooooops. It was a stupid bug in my script: textLine[:-
int(textLine[-1]=='\n')] is not what I want (the real code was not a
one-liner)! The documentation made me think that something wrong was
going on with python but I should have known better.

Thanks.







From kyosohma at gmail.com  Wed Sep  5 12:23:12 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 05 Sep 2007 16:23:12 -0000
Subject: Text processing and file creation
In-Reply-To: <1189008809.718361.45790@g4g2000hsf.googlegroups.com>
References: <1189008809.718361.45790@g4g2000hsf.googlegroups.com>
Message-ID: <1189009392.762504.87070@19g2000hsx.googlegroups.com>

On Sep 5, 11:13 am, "malibus... at gmail.com" <malibus... at gmail.com>
wrote:
> I have a text source file of about 20.000 lines.>From this file, I like to write the first 5 lines to a new file. Close
>
> that file, grab the next 5 lines write these to a new file... grabbing
> 5 lines and creating new files until processing of all 20.000 lines is
> done.
> Is there an efficient way to do this in Python?
> In advance, thanks for your help.

I would use a counter in a for loop using the readline method to
iterate over the 20,000 line file. Reset the counter every 5 lines/
iterations and close the file. To name files with unique names, use
the time module. Something like this:

x = 'filename-%s.txt' % time.time()

Have fun!

Mike



From Sean.Sugrue at analog.com  Fri Sep 28 13:22:27 2007
From: Sean.Sugrue at analog.com (Sugrue, Sean)
Date: Fri, 28 Sep 2007 13:22:27 -0400
Subject: FW: OCBC connection
Message-ID: <8FDC0F9BE1F91D44BE964AA54AAA67B629B61E8F@wilmexm3.ad.analog.com>

Is this the right email list to be on for asking rather elementary
python questions?
If not do you have a suggestion

Sean 

-----Original Message-----
From: python-list-bounces+sean.sugrue=analog.com at python.org
[mailto:python-list-bounces+sean.sugrue=analog.com at python.org] On Behalf
Of Sugrue, Sean
Sent: Friday, September 28, 2007 10:58 AM
To: python-list at python.org
Subject: OCBC connection

I'm trying to make an odbc connection to postgresql which is on a server
using python.
Does anyone have a code snippet to make a basic connection with a select
query?

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


From ldo at geek-central.gen.new_zealand  Sat Sep  1 02:52:01 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 01 Sep 2007 18:52:01 +1200
Subject: How to find parent function/class of generators?
References: <mailman.289.1188029998.32294.python-list@python.org>
Message-ID: <fbb21s$evf$7@lust.ihug.co.nz>

In message <mailman.289.1188029998.32294.python-list at python.org>, J. A.
Aczel wrote:

> Unfortunately, generator objects don't seem to include any information
> about the parent object or function that created them.

So add your own.



From bbxx789_05ss at yahoo.com  Sat Sep 15 19:25:10 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sat, 15 Sep 2007 16:25:10 -0700
Subject: (wxPython) wx.ProgressDialog - how to cancel out of?
In-Reply-To: <rvrme3tb8snr5rnqgf5p8g1g4ponp0nbfj@4ax.com>
References: <rvrme3tb8snr5rnqgf5p8g1g4ponp0nbfj@4ax.com>
Message-ID: <1189898710.639012.142170@19g2000hsx.googlegroups.com>

Terry Carroll wrote:
>
> 2) The variable "skip: set to False on the first iteration, and then
> set to True on subsequent iterations?  Note that this happens even if
> no buttons are selected.  This is just a weirdness to me, and not my
> main concern, but I thought I'd mention it in case it's relevant.
>

The docs say:

wx.PD_CAN_SKIP
This flag tells the dialog that it should have a "Skip" button which
the user may press. If this happens, the next call to Update() will
return True in the second component of its return value.

What I'm seeing is: the second item in the tuple returned by Update()
is False if the skip button wasn't clicked and it's True for one
return value when the skip button was clicked, then the value reverts
back to False when Update() returns the next time.



From wesbrooks at gmail.com  Wed Sep  5 06:30:05 2007
From: wesbrooks at gmail.com (Wesley Brooks)
Date: Wed, 5 Sep 2007 11:30:05 +0100
Subject: concise code (beginner)
In-Reply-To: <eec9f8ee0709050326u6e410ec1l93afe83cfce69f8e@mail.gmail.com>
References: <13dsvqrqivtf092@corp.supernews.com>
	<eec9f8ee0709050326u6e410ec1l93afe83cfce69f8e@mail.gmail.com>
Message-ID: <eec9f8ee0709050330k1a0596dcp49961901a2047d10@mail.gmail.com>

Sorry, just seen a mistake in my code, however Diez beat me to what I
was actually thinking!

Wes

On 05/09/07, Wesley Brooks <wesbrooks at gmail.com> wrote:
> Try adding all the functions into a list such as;
>
> funcList = [dev.read1, dev.read2, dev.read3]
>
> for func in funcList:
>    for dev in devs:
>        try:
>            func()
>        except:
>            print exception
>            remove dev from devs
>
> Wes.
>
> On 05/09/07, bambam <david at asdf.asdf> wrote:
> > I have about 30 pages (10 * 3 pages each) of code like this
> > (following). Can anyone suggest a more compact way to
> > code the exception handling? If there is an exception, I need
> > to continue the loop, and continue the list.
> >
> > Steve.
> >
> > -----------------------------------
> > for dev in devs
> >     try:
> >         dev.read1()
> >     except
> >         print exception
> >         remove dev from devs
> >
> > for dev in devs
> >     try:
> >         dev.read2()
> >     except
> >         print exception
> >         remove dev from devs
> >
> > for dev in devs
> >     try:
> >         dev.read3()
> >     except
> >         print exception
> >         remove dev from devs
> >
> > etc.
> >
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>


From paul.nospam at rudin.co.uk  Tue Sep 25 06:10:29 2007
From: paul.nospam at rudin.co.uk (Paul Rudin)
Date: Tue, 25 Sep 2007 11:10:29 +0100
Subject: obtaining multiple values from a function.
References: <1190708155.683502.93040@r29g2000hsg.googlegroups.com>
	<87sl53m90t.fsf@benfinney.id.au> <87zlzbrsih.fsf@rudin.co.uk>
	<mailman.1033.1190714497.2658.python-list@python.org>
Message-ID: <87sl53rr6y.fsf@rudin.co.uk>

Carsten Haese <carsten at uniqsys.com> writes:


> ...
> That's not the Fibonacci sequence.

Bah, you're right of course, I should be more more careful before
posting these things. 



From h.jaeger at medienkonzepte.de  Wed Sep 26 06:45:02 2007
From: h.jaeger at medienkonzepte.de (Horst =?iso-8859-1?Q?J=E4ger?=)
Date: Wed, 26 Sep 2007 12:45:02 +0200
Subject: Documentation about pyexpat
Message-ID: <7.0.1.0.1.20070926124001.01c055b8@medienkonzepte.de>

Hi,

is there any documentation about the pyexpat lib?

Sorry if this is a stupid question :)



Horst



From tim.arnold at sas.com  Tue Sep 18 14:43:14 2007
From: tim.arnold at sas.com (Tim Arnold)
Date: Tue, 18 Sep 2007 14:43:14 -0400
Subject: cvs module
Message-ID: <fcp682$goe$1@foggy.unx.sas.com>

Hi, I need to do some scripting that interacts with CVS. I've been just 
doing system calls and parsing the output to figure out what's going on, but 
it would be nice to deal with CVS directly.

Does anyone know of a python module I can use to interface with CVS?
thanks,
--Tim Arnold




From stefan.arentz at gmail.com  Mon Sep 10 07:10:24 2007
From: stefan.arentz at gmail.com (Stefan Arentz)
Date: 10 Sep 2007 13:10:24 +0200
Subject: Using s.sort([cmp[, key[,
	reverse]]]) to sort a list of objects based on a attribute
References: <1189173455.525144.326300@y42g2000hsy.googlegroups.com>
	<87k5r2zhd6.fsf@kip.sateh.com>
	<1189319685.273092.31830@r34g2000hsd.googlegroups.com>
	<87ejh86vrl.fsf@kip.sateh.com>
	<1i460vg.1lrus8jsdn4qN%aleax@mac.com>
Message-ID: <87odga6ajj.fsf@kip.sateh.com>

aleax at mac.com (Alex Martelli) writes:

> Stefan Arentz <stefan.arentz at gmail.com> wrote:
> 
> > Miki <miki.tebeka at gmail.com> writes:
> > 
> > > >   steps.sort(key = lambda s: s.time)
> > > This is why attrgetter in the operator module was invented.
> > > from operator import attrgetter
> > > ...
> > > steps.sort(key=attrgettr("time"))
> > 
> > Personally I prefer the anonymous function over attrgettr :)
> 
> However, Python disagrees with you...:
> 
> brain:~ alex$ python -mtimeit -s'from operator import attrgetter;
> L=map(complex,xrange(999))' 'sorted(L, key=lambda x:x.real)'
> 1000 loops, best of 3: 567 usec per loop
> 
> brain:~ alex$ python -mtimeit -s'from operator import attrgetter;
> L=map(complex,xrange(999))' 'sorted(L, key=attrgetter("real"))'
> 1000 loops, best of 3: 367 usec per loop
> 
> A speed-up of 35% is a pretty clear indicator of what _Python_ "prefers"
> in this situation:-).

I could not care less :-)

 S.


From maxime.p at gmail.com  Fri Sep 21 10:29:13 2007
From: maxime.p at gmail.com (Ulysse)
Date: Fri, 21 Sep 2007 07:29:13 -0700
Subject: Remote Command a Python Script
Message-ID: <1190384953.774277.249350@k79g2000hse.googlegroups.com>

Hello,

I've installed Python 2.5 on my WRT54G Linksys Router. On this router
a script is executed. This script write a little Pickle database in
the router memory.

I would like to write another Python script which will be able to :

1. Stop and start the remote script from my Windows Computer. At
present I use Putty to connect to the router by the SSL, then I
manually kill the python process.

2. Retrieve the little database located in router memory and backup it
on my Window PC. At present I use WinSCP (like FTP) to get the pickle
file.

Can you help me with that (modules to use, useful code snippets)

Thank a lot,

Maxime



From BjornSteinarFjeldPettersen at gmail.com  Sat Sep 29 11:11:36 2007
From: BjornSteinarFjeldPettersen at gmail.com (thebjorn)
Date: Sat, 29 Sep 2007 08:11:36 -0700
Subject: sorteddict [was a PEP proposal, but isn't anymore!]
In-Reply-To: <Xns99BA9C6861A3Eduncanbooth@127.0.0.1>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190829592.800804.242260@50g2000hsm.googlegroups.com>
	<1190881576.186259.313720@57g2000hsv.googlegroups.com>
	<1190897445.179828.291720@y42g2000hsy.googlegroups.com>
	<slrnffslvp.40p.apardon@rcpc42.vub.ac.be>
	<Xns99BA9C6861A3Eduncanbooth@127.0.0.1>
Message-ID: <1191078696.664214.152350@50g2000hsm.googlegroups.com>

On Sep 29, 4:23 pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
[...]
> Another example would be if you had a library which serialised a dictionary
> to xml. There is nothing wrong with the library if it doesn't care about
> order, but if you have some other reason why you want the xml to be stable
> (e.g. because you store it in a version control system and want to compare
> revisions) then a sorteddict would allow you to impose that behaviour on
> the library from outside.
>
> Contrary to my earlier insistence that sorteddict is only really useful if
> you can have a key parameter, both of these examples simply want an
> arbitrary but defined order of iteration for dictionary keys. A much
> simpler sorteddict that has been discussed earlier would be sufficient.

In fact, a dictionary that maintains insertion order would work in
this case too.

-- bjorn



From lorenzo.digregorio at gmail.com  Fri Sep 14 02:16:56 2007
From: lorenzo.digregorio at gmail.com (Lorenzo Di Gregorio)
Date: Fri, 14 Sep 2007 06:16:56 -0000
Subject: "once" assigment in Python
Message-ID: <1189750616.597409.85380@w3g2000hsg.googlegroups.com>

Hello,

I've been using Python for some DES simulations because we don't need
full C speed and it's so much faster for writing models.  During
coding I find it handy to assign a variable *unless it has been
already assigned*: I've found that this is often referred to as "once"
assigment.

The best I could come up with in Python is:

try:
  variable
except NameError:
  variable = method()

I wonder if sombody has a solution (trick, whatever ...) which looks
more compact in coding.  Something like:

once(variable, method)

doesn't work, but it would be perfect.  Of course I can preprocess the
Python code but an all-Python solution would be more handy.

Any suggestions?

Thx in advance,
Lorenzo



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Sep  5 13:25:07 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 05 Sep 2007 19:25:07 +0200
Subject: So what exactly is a complex number?
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>	<mailman.212.1188576194.28954.python-list@python.org>	<451mq4-les.ln1@ozzie.tundraware.com>	<mailman.266.1188644067.28954.python-list@python.org>	<lbjpq4-eo22.ln1@ozzie.tundraware.com>	<mailman.310.1188805355.28954.python-list@python.org>
	<1188821241.516029.229020@o80g2000hse.googlegroups.com>
	<mailman.76.1188991428.2658.python-list@python.org>
Message-ID: <5k873jF2i7l1U1@mid.individual.net>

Grzegorz S?odkowicz wrote:
> I believe vectors can only be added if they have the same point of
> application. 

That may be true in physical observations, but doesn't make "point
of application" a vector property. If you had it as property, you
could never say that in a force field the force was equal at two
points.

This is also contradicted by the fact that complex numbers are used
to represent vectors. A complex number only has a "direction" (in a
plane) and "length". Not more.

> The result is then applied to the same point. 

To which points "apply" velocity vectors, unit vectors, or axial
vectors (like angular velocity)?

Regards,


Bj?rn

-- 
BOFH excuse #354:

Chewing gum on /dev/sd3c



From gtcopeland at gmail.com  Sun Sep  2 09:31:42 2007
From: gtcopeland at gmail.com (Greg Copeland)
Date: Sun, 02 Sep 2007 13:31:42 -0000
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
In-Reply-To: <1188735642.391419.103650@19g2000hsx.googlegroups.com>
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
	<1188735642.391419.103650@19g2000hsx.googlegroups.com>
Message-ID: <1188739902.598343.246660@22g2000hsm.googlegroups.com>

On Sep 2, 7:20 am, Arnaud Delobelle <arno... at googlemail.com> wrote:
> On Sep 2, 12:51 pm, jwrweather... at gmail.com wrote:
>
>
>
> > I'm pretty new to python, but am very happy with it. As well as using
> > it at work I've been using it to solve various puzzles on the Project
> > Euler site -http://projecteuler.net. So far it has not let me down,
> > but it has proved surprisingly slow on one puzzle.
>
> > The puzzle is: p is the perimeter of a right angle triangle with
> > integral length sides, {a,b,c}. which value of p  < 1000, is the
> > number of solutions {a,b,c} maximised?
>
> > Here's my python code:
>
> > #!/usr/local/bin/python
>
> > solutions = [0] * 1001
> > p = 0
>
> > for a in xrange(1, 1000):
> >     for b in xrange(1, 1000 - a):
> >         for c in xrange(1, 1000 - a - b):
> >             p = a + b + c
> >             if p < 1000:
> >                 if a ** 2 + b ** 2 == c ** 2:
> >                     solutions[p] += 1
>
> > max = 0
> > maxIndex = 0
> > index = 0
> > for solution in solutions:
> >     if solution > max:
> >         max = solution
> >         maxIndex = index
> >     index += 1
>
> > print maxIndex
>
> > It takes 2 minutes and twelve seconds on a 2.4GHz Core2Duo MacBook
> > Pro. Surprised at how slow it was I implemented the same algorithm in
> > C:
>
> > #include <stdio.h>
> > #include <stdlib.h>
>
> > int main() {
> >   int* solutions = calloc(1000, sizeof(int));
>
> >   int p;
> >   for(int a = 1; a < 1000; ++a) {
> >     for(int b = 1; b < 1000 - a; ++b) {
> >       for(int c = 1; c < 1000 - a - b; ++c) {
> >         p = a + b + c;
> >         if(p < 1000) {
> >           if(a * a + b * b == c * c) {
> >             solutions[p] += 1;
> >           }
> >         }
> >       }
> >     }
> >   }
>
> >   int max = 0;
> >   int maxIndex = 0;
>
> >   for(int i = 0; i < 1000; ++i) {
> >     if(solutions[i] > max) {
> >       max = solutions[i];
> >       maxIndex = i;
> >     }
> >   }
> >   printf("%d\n", maxIndex);
> >   return 0;
>
> > }
>
> > gcc -o 39 -std=c99 -O3 39.c
>
> > The resulting executable takes 0.24 seconds to run. I'm not expecting
> > a scripting language to run faster than native code, but I was
> > surprised at how much slower it was in this case. Any ideas as to what
> > is causing python so much trouble in the above code?
>
> from math import sqrt
>
> solutions = [0] * 1001
> p = 0
>
> for a in xrange(1, 1000):
>     a2 = a*a
>     for b in xrange(1, 1000 - a):
>         c = sqrt(a2 + b*b)
>         if c == int(c) and a+b+c < 1000:
>             solutions[a+b+int(c)] += 1
>
> max = 0
> maxIndex = 0
> index = 0
> for solution in solutions:
>     if solution > max:
>         max = solution
>         maxIndex = index
>     index += 1
>
> print maxIndex
>
> --
> Arnaud

For the curious:

O	O + P	A	A + P
======= ======= ======= =======
2:22.56 0:25.65 0:00.75 0:00.20

O = Original Implementation
P = Psyco (psyco.full())
A = Arnaud's Revised Implementation



From python at rcn.com  Wed Sep 26 16:06:36 2007
From: python at rcn.com (Raymond Hettinger)
Date: Wed, 26 Sep 2007 13:06:36 -0700
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <fdebrf$chm$1@daisy.noc.ucla.edu>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190829592.800804.242260@50g2000hsm.googlegroups.com>
	<fdebrf$chm$1@daisy.noc.ucla.edu>
Message-ID: <1190837196.742499.13900@w3g2000hsg.googlegroups.com>

[James Stroud ]
> Maybe its the PEP killers who act prematurely because I friggin' love
> genexps and the little generators they generate.

No, it's the PEP author who controls when they ask for pronouncement.
The natural instinct is to ask for pronouncement as soon as you have
an implementation and a couple of advocates, but the smarter play is
to put the code in the wild and let it mature so that the kinks get
worked out, a fan club can grow, the patterns of usage become
established, and acceptance/rejection becomes self-evident.

Genexps got hung-up on details like whether the loop variable should
be visible (like it is with list comps), was it faster or slower than
list comps (unknown until an implementation was provided), could it be
fit into the grammar unambiguously (the answer was yes *after*
introducing a requirement for enclosing parentheses in some cases).
Also, there were some cases that had (and still have) surprising
behaviors -- in the end, those were addressed by adding advice to
consumer genexps right away and not pass them around like regular
generators where the scoping was more self-evident.

The other disadvantage of asking for pronouncement prematurely is the
risk that everyone gives it a nod without deep thought about whether
it is truly necessary and useful.  I got dict.fromkeys() accepted
without much fuss but now am now sure it was a good idea -- it added
to an already heavy dict API but did not offer compelling usability
advantages or performance advantages.  Had the set() builtin already
been in place, it is much less likely that dict.fromkeys would have
been accepted.


Raymond



From horpner at yahoo.com  Thu Sep 13 13:32:38 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 13 Sep 2007 17:32:38 GMT
Subject: recursion
References: <fcbfnj$lh4$1@ss408.t-com.hr>
	<slrnfeinvk.1cc.horpner@FIAD06.norwich.edu>
	<mailman.491.1189700115.2658.python-list@python.org>
Message-ID: <slrnfeit3k.1lg.horpner@FIAD06.norwich.edu>

On 2007-09-13, Ian Clark <iclark at mail.ewu.edu> wrote:
> Neil Cerutti wrote:
>> On 2007-09-13, Gigs_ <gigs at hi.t-com.hr> wrote:
>>> Can someone explain me this
>>>
>>>>>> def f(l):
>>> 	if l == []:
>>> 		return []
>>> 	else:
>>> 		return f(l[1:]) + l[:1]  # <= cant figure this, how is all sum at the end?
>> 
>> In plain English, the above program says:
>> 
>> The sum of the items in list l is zero if the list is empty.
>> Otherwise, the sum is the value of the first item plus the sum of
>> the rest of the items in the list.
>
> Am I missing something? What does this have to do with summing?
>
>      >>> def f(l):
>      ...     if l == []:
>      ...         return []
>      ...     else:
>      ...         return f(l[1:]) + l[:1]
>      ...
>      >>> f([1, 2, 3, 4])
>      [4, 3, 2, 1]

It says: You need to read more than the first sentence of a
message before responsing:

> Well, it would say that if it weren't somewhat buggy. l[:1]
> doesn't evaluate to a number, but to a list containing one
> number, so the above program doesn't do what you say it does.
>
> It should read something like:
>
>  def my_sum(seq):
>    if len(seq) == 0:
>      return 0
>    else:
>      return seq[0] + my_sum(seq[1:])

-- 
Neil Cerutti


From dohertywa at gmail.com  Sun Sep 16 11:01:26 2007
From: dohertywa at gmail.com (dohertywa)
Date: Sun, 16 Sep 2007 15:01:26 -0000
Subject: Probstat Combination Objects and Persistence
Message-ID: <1189954886.324005.325240@22g2000hsm.googlegroups.com>

Hi:

I'm working with probstat module which does an excellent job for the
project I'm working on.

I am passing the Combination objects I generate to generator functions
that allow me to scale down the results.

I am trying to find a way however to store the end resultant
Combination object.  Try to pickle it, and Python segfaults.

I want to be able to store the Combination object at any point so I
may operate on it later without having to repeat previous work.

Any suggestions?

TVKIA,
Adam



From s.mientki at id.umcn.nl  Wed Sep 12 09:26:24 2007
From: s.mientki at id.umcn.nl (stef)
Date: Wed, 12 Sep 2007 15:26:24 +0200
Subject: Is the wxPython list down?
In-Reply-To: <1189602607.803546.180320@w3g2000hsg.googlegroups.com>
References: <1189602607.803546.180320@w3g2000hsg.googlegroups.com>
Message-ID: <591b7$46e7e900$83aef404$14417@news2.tudelft.nl>

kyosohma at gmail.com wrote:
> Hi,
>
> Does anyone know if the wxPython mailing list is having issues? I
>   
Yes the server has hardware problems,
Robin Dunn (moderator), is informed about it.

cheers,
Stef Mientki


From brandon.w.barry at gmail.com  Thu Sep 13 18:40:33 2007
From: brandon.w.barry at gmail.com (Brandon Barry)
Date: Thu, 13 Sep 2007 22:40:33 -0000
Subject: How to Start
In-Reply-To: <MPG.215360ba6684d43b9896d5@news.cox.net>
References: <MPG.215360ba6684d43b9896d5@news.cox.net>
Message-ID: <1189723233.969322.81110@o80g2000hse.googlegroups.com>

On Sep 13, 5:59 pm, mrc2... at cox.net (Michael R. Copeland) wrote:
>    I've decided that Python is a language/environment I'd like to learn
> (I've been a professional programmer for 45+ years), but I really don't
> know where and how to start!  I have a number of books - and am buying
> some more - but because of the bewildering number of after-market
> packages, environments, and add-ons, I am really quite perplexed about
> starting.  8<{{
>    Yes, I could fire up the interactive mode and play with some
> statements...but I consider that sort of thing for programming neophytes
> or experimenting with specific issues.  First, I want to develop a
> simple Windows application, and because of the plethora of "stuff" the
> Python world offers, I don't know where to begin.
>    For example, what basic, easy-to-use interface might I start with to
> build a simple text file parsing and analysis program?  That is, I'd
> like to start with a simple Windows shell that prompts for a file name,
> processes it, and then displays some result.
>    I am certainly impressed with the apparent experience and openness of
> the regular players here, but the discussions here (and in
> c.l.p.announce) truly presume knowledge and experience with Python I
> don't yet have.  Yes, for even a very experienced programmer, entering
> the Python world is very daunting - but I want to get started.
>    Please advise.  TIA

Michael,

I suggest starting with Python's core documentation.  Its rather well
written and contains many examples.  If nothing else, a thorough
review of the Library reference may help you evaluate the
"after-market packages, environments, and add-ons" you describe.

    http://docs.python.org/tut/tut.html (Tutorial)
    http://docs.python.org/lib/lib.html (Library Reference)
    http://docs.python.org/ref/ref.html (Language Reference)

The simple text parsing and analysis program you are considering seems
unlikely to require either "Extending and Embedding" or the Python/C
API, but if you find yourself drawn to either topic I again suggest
starting with the core documentation.

    http://docs.python.org/ext/ext.html (Extending and Embedding)
    http://docs.python.org/api/api.html (Python/C API)

You may also find it useful to examine others' programs.  The Python
Package Index and ActiveState's Python Cookbook are both excellent
resources.

    http://cheeseshop.python.org/pypi (Package Index)
    http://aspn.activestate.com/ASPN/Python/Cookbook/

Every new Python user should read David Goodger's "Idiomatic Python"
tutorial.

    http://python.net/~goodger/projects/pycon/2007/idiomatic/handout.html

I've benefited greatly from HOWTOs available at A.M. Kuchling's
website.

    http://www.amk.ca/python/howto/

Be sure to consider the optparse and cmd modules if you decide to
develop the simple shell you've described.

I hope this helps,
Brandon



From madzientist at gmail.com  Wed Sep 12 17:54:53 2007
From: madzientist at gmail.com (madzientist)
Date: Wed, 12 Sep 2007 14:54:53 -0700
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <13efndlln9n9659@corp.supernews.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<13efndlln9n9659@corp.supernews.com>
Message-ID: <1189634093.644036.40780@r29g2000hsg.googlegroups.com>


As a newbie to Python (and OOP), I would love to hear what people
think of Steven's suggestion below. Is there a reason why classes
would be useful for the OP's question ? If you can point me to a brief
online tutorial addressing this, I would happily go there to read it
too :)

Thanks, Suresh

On Sep 12, 8:38 am, Steven D'Aprano <st... at REMOVE-THIS-
cybersource.com.au> wrote:
> On Wed, 12 Sep 2007 03:21:58 -0700, Charles Fox wrote:
> > I've just started playing around with Python, as a possible replacement
> > for a mix of C++, Matlab and Lisp.  The language looks lovely and clean
> > with one huge exception:  I do a lot of numerical modeling, so I deal
> > with objects (like neurons) described mathematically in papers, by
> > equations like
> >     a_dot = -k(a-u)
> > In other languages, this translates nicely into code, but as far as I
> > can tell, Python needs the ugly:
> >     self.a_dot = -self.k(self.a-self.u)
>
> I think you've been seriously mislead. You don't NEED self. That's only
> for writing classes.
>
> Although Python is completely object oriented, and everything is an
> object, you don't have to put your code in classes.
>
> Instead of doing something like this:
>
> class Adder(object):
>     """Pointless class to add things."""
>     def __init__(self, value):
>         self.value = other
>     def add(self, other):
>         x = self.value + other
>         return float(x)
>
> you don't need a class. Just write a function:
>
> def add(x, other):
>     """Function that adds other to x."""
>     return float(x + other)
>
> Here's how I would write your function above:
>
> def function(a, u, k):
>     """Calculate a_dot from a, u and k."""
>     return -k(a-u)
>
> And here is how I would use it:
>
> a = 57 # or whatever...
> u = 54
> k = 3
> a_dot = function(a, u, k)
>
> See? Not a single "self" in sight.
>
> You might also like to read about a strange, bizarre programming that
> forces you to put everything inside classes:
>
> http://steve-yegge.blogspot.com/2006/03/execution-in-kingdom-of-nouns...
>
> --
> Steven.




From rustompmody at gmail.com  Tue Sep 18 01:12:00 2007
From: rustompmody at gmail.com (Rustom Mody)
Date: Tue, 18 Sep 2007 10:42:00 +0530
Subject: can Python be useful as functional?
In-Reply-To: <1190073045.618869.261290@k79g2000hse.googlegroups.com>
References: <1190073045.618869.261290@k79g2000hse.googlegroups.com>
Message-ID: <f46c52560709172212i39986b10l940a688364038a2f@mail.gmail.com>

The following defines the infinite list of primes as a generator [chap
6.5 of the library]

def sieve(l):
    p = l.next()
    yield p
    for x in sieve(l):
        if x % p != 0:
            yield x

After that

from itertools import *
>>> [p for i,p in izip(range(10), sieve(count(2)))]
[2, 3, 5, 7, 11, 13, 17, 19, 23, 29]
>>>


I tried to write a shorter generator expression based sieve but cant
get it right.
Can someone help? Heres the non-working code

def si(l):
    p = l.next()
    yield p
    (x for x in si(l) if x % p != 0)

There should be an yield or return somewhere but cant figure it out

On 9/18/07, Lorenzo Stella <lorestar at gmail.com> wrote:
> Hi all,
> I haven't experienced functional programming very much, but now I'm
> trying to learn Haskell and I've learned that: 1) in functional
> programming LISTS are fundmental; 2) any "cycle" in FP become
> recursion.
> I also know that Python got some useful tool such as map, filter,
> reduce... so I told: "let's try some FP-style programming with
> Python!". I took a little example of Haskell:
>
>      listprimes :: Integer -> [Integer]
>      listprimes n = if n == 0 then sieve [2..] else sieve [2..(n-1)]
> where
>             sieve [] = []
>             sieve (p:xs) = p : sieve (filter (\x -> mod x p > 0) xs)
>
> and I tried to "translate" it in Python:
>
>      def sieve(s):
>          if s == []:
>              return []
>          else:
>              return [s[0]] + sieve(filter((lambda x: x % s[0] > 0),
> s[1:]))
>
>      def listprimes(n):
>          return sieve(range(2,n))
>
> These should be almost the same: listprimes actually lists prime
> integers up to n-1. The result is: Haskell implementation works well,
> maybe it's not the better way to do it, but it does what I wanted.
> Python implementation gives me
>
>      RuntimeError: maximum recursion depth exceeded in cmp
>
> My question is: how can we call a language "functional" if it's major
> implementation has a limited stack? Or is my code wrong?
>
> LS
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From stefan.behnel-n05pAM at web.de  Sun Sep  9 02:20:39 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Sun, 09 Sep 2007 08:20:39 +0200
Subject: Python syntax wart
In-Reply-To: <5khh6nF3i5nuU1@mid.uni-berlin.de>
References: <fbvvil$7dj$1@lust.ihug.co.nz> <5khh6nF3i5nuU1@mid.uni-berlin.de>
Message-ID: <46E390B7.2080808@web.de>

Marc 'BlackJack' Rintsch wrote:
> On Sun, 09 Sep 2007 17:16:05 +1200, Lawrence D'Oliveiro wrote:
> 
>> The one thing I don't like about Python syntax is using backslashes to
>> continue lines. Yes, you can avoid them if you can include parentheses
>> somehow, but this isn't always possible.
>>
>> Possible:
>>
>> [?]
>>
>> Not possible:
>>
>>     for \
>>         Link \
>>     in \
>>         GetEachRecord \
>>           (
>>             "links",
>>             ("from_episode",),
>>             "to_episode = %s",
>>             [EpisodeID],
>>             "order by when_created"
>>           ) \
>>     :
>>         out.write \
>>           (
>>                 "<P><A HREF=\"%s\">Back to episode %d</A>\n"
>>             %
>>                 (
>>                     LinkToMe({"ep" : Link["from_episode"]}),
>>                     Link["from_episode"]
>>                 )
>>           )
>>     #end for
> 
> What do you mean by not possible!?  This compiles fine for me.

He means he has to use backslashes instead of parentheses here.

Which is not true, you could easily rephrase this as:

    for link in GetEachRecord(
             "links",
             ....):
        out.write(
             ....
             )

See? No backslash!

Stefan


From Scott.Daniels at Acm.Org  Sun Sep 23 17:26:32 2007
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sun, 23 Sep 2007 14:26:32 -0700
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <mailman.936.1190535220.2658.python-list@python.org>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>	<mailman.900.1190414696.2658.python-list@python.org>	<1190415741.380795.259050@y42g2000hsy.googlegroups.com>	<13f8unjjeqs5p97@corp.supernews.com>	<mailman.916.1190444594.2658.python-list@python.org>	<13faa66cb1phre1@corp.supernews.com>
	<mailman.936.1190535220.2658.python-list@python.org>
Message-ID: <13fdmdmsaasak91@corp.supernews.com>

Ron Adam wrote:
> Scott David Daniels wrote:
>> Ron Adam wrote:
>>> .... How about this?
>>> def integrate(fn, x1, x2, n=100):...
>> The point was a pedagogic suggestion, ... 
> I understood your point.  I just found it interesting since I've been 
> trying to extend my math (for use with python) skills in this area.

Ah, sorry.  I had realized I wasn't explicit in my first message.
Yes, a perfectly fine integration.

You can then (and this is a major jump to get used to):
     import functools

     Sine = functools.partial(integrate, math.cos, 0.0, n=100)

Similarly, you can define a derivative that will behave fairly well,
all without examining the definition of the function being operated
upon.

-Scott



From f.braennstroem at gmx.de  Thu Sep 13 17:09:16 2007
From: f.braennstroem at gmx.de (Fabian Braennstroem)
Date: Thu, 13 Sep 2007 21:09:16 +0000
Subject: extract text from log file using re
Message-ID: <fcc1so$pcv$1@sea.gmane.org>

Hi,

I would like to delete a region on a log file which has this
kind of structure:


#------flutest------------------------------------------------------------
   498 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04
8.3956e-04 3.8560e-03 4.8384e-02 11:40:01  499
   499 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04
8.3956e-04 3.8560e-03 4.8384e-02 11:40:01  499
reversed flow in 1 faces on pressure-outlet 35.

Writing
"/home/gcae504/SCR1/Solververgleich/Klimakruemmer_AK/CAD/Daimler/fluent-0500.cas"...
 5429199 mixed cells, zone 29, binary.
11187656 mixed interior faces, zone 30, binary.
   20004 triangular wall faces, zone 31, binary.
    1104 mixed velocity-inlet faces, zone 32, binary.
  133638 triangular wall faces, zone 33, binary.
   14529 triangular wall faces, zone 34, binary.
    1350 mixed pressure-outlet faces, zone 35, binary.
   11714 mixed wall faces, zone 36, binary.
 1232141 nodes, binary.
 1232141 node flags, binary.
Done.


Writing
"/home/gcae504/SCR1/Solververgleich/Klimakruemmer_AK/CAD/Daimler/fluent-0500.dat"...
Done.

   500 1.0049e-03 2.4630e-04 9.8395e-05 1.4865e-04
8.3913e-04 3.8545e-03 1.3315e-01 11:14:10  500

 reversed flow in 2 faces on pressure-outlet 35.
   501 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04
8.3956e-04 3.8560e-03 4.8384e-02 11:40:01  499

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

I have a small script, which removes lines starting with
'(re)versed', '(i)teration' and '(t)urbulent'  and put the
rest into an array:

# -- plot residuals ----------------------------------------
      import re
filename="flutest"
reversed_flow=re.compile('^\ re')
turbulent_viscosity_ratio=re.compile('^\ tu')
iteration=re.compile('^\ \ i')

begin_of_res=re.compile('>\ \ \ i')
end_of_res=re.compile('^\ ad')

begin_of_writing=re.compile('^\Writing')
end_of_writing=re.compile('^\Done')

end_number=0
begin_number=0


n = 0
for line in open(filename).readlines():
    n = n + 1
    if begin_of_res.match(line):
        begin_number=n+1
        print "Line Number (begin): " + str(n)

    if end_of_res.match(line):
        end_number=n
        print "Line Number (end): " + str(n)

    if begin_of_writing.match(line):
        begin_w=n+1
        print "BeginWriting: " + str(n)
        print "HALLO"

    if end_of_writing.match(line):
        end_w=n+1
        print "EndWriting: " +str(n)

if n > end_number:
    end_number=n
    print "Line Number (end): " + str(end_number)





n = 0
array = []
array_dummy = []
array_mapped = []

mapped = []
mappe = []

n = 0
for line in open(filename).readlines():
    n = n + 1
    if (begin_number <= n) and (end_number > n):
#        if (begin_w <= n) and (end_w > n):
            if not reversed_flow.match(line) and not
iteration.match(line) and not
turbulent_viscosity_ratio.match(line):
                m=(line.strip().split())
                print m
                if len(m) > 0:
#                    print len(m)
                    laenge_liste=len(m)
#                    print len(m)
                    mappe.append(m)


#--end plot
residuals-------------------------------------------------

This works fine ; except for the region with the writing
information:

#-----writing information
-----------------------------------------
Writing "/home/fb/fluent-0500.cas"...
 5429199 mixed cells, zone 29, binary.
11187656 mixed interior faces, zone 30, binary.
   20004 triangular wall faces, zone 31, binary.
    1104 mixed velocity-inlet faces, zone 32, binary.
  133638 triangular wall faces, zone 33, binary.
   14529 triangular wall faces, zone 34, binary.
    1350 mixed pressure-outlet faces, zone 35, binary.
   11714 mixed wall faces, zone 36, binary.
 1232141 nodes, binary.
 1232141 node flags, binary.
Done.
# -------end writing information -------------------------------

Does anyone know, how I can this 'writing' stuff too? The
matchingIt occurs a lot :-(

Regards!
Fabian



From carsten at uniqsys.com  Fri Sep  7 09:27:35 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 07 Sep 2007 09:27:35 -0400
Subject: Is a Borg rebellion possible?   (a metaclass question)
In-Reply-To: <1189168282.665210.260840@19g2000hsx.googlegroups.com>
References: <1189168282.665210.260840@19g2000hsx.googlegroups.com>
Message-ID: <1189171655.3367.38.camel@dot.uniqsys.com>

On Fri, 2007-09-07 at 12:31 +0000, Andr? wrote:
> In my application, I make use of the Borg idiom, invented by Alex
> Martelli.
> 
> class Borg(object):
>     '''Borg Idiom, from the Python Cookbook, 2nd Edition, p:273
> 
>     Derive a class form this; all instances of that class will share
> the
>     same state, provided that they don't override __new__; otherwise,
>     remember to use Borg.__new__ within the overriden class.
>     '''
>     _shared_state = {}
>     def __new__(cls, *a, **k):
>         obj = object.__new__(cls, *a, **k)
>         obj.__dict__ = cls._shared_state
>         return obj
> 
> ----
> This has worked very well so far, but is starting to impose some
> unwanted constraints on my program design.
> 
> What I would like to do is, to put it figuratively, create a Borg
> rebellion with various splinter groups.  In concrete Python terms, I
> would like to have
> 
> class MyClass(Borg, ...):
>    ...
> 
> seven_of_nine = MyClass(...)  # part of group "BORG"
> two_of_nine = MyClass(...)
> 
> splinter1 = MyClass(..., group='splinter')
> splinter2 = MyClass(..., group='splinter')
> 
> and have splinter 1 and splinter2 share the same state, but a
> different state than the one shared by members of the BORG collective.
> 
> Any suggestions from the metaclass experts?

You don't need a metaclass. Just turn _shared_state into a dictionary of
shared states, keyed by the group name:

class SplinterBorg(object):
    _shared_states = {}
    def __new__(cls, *a, **k):
        group = k.pop("group","BORG")
        obj = object.__new__(cls, *a, **k)
        obj.__dict__ = cls._shared_states.setdefault(group,{})
        return obj

HTH,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From Shawn at Milochik.com  Fri Sep 14 09:44:23 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Fri, 14 Sep 2007 09:44:23 -0400
Subject: [Tutor] Just bought Python in a Nutshell
In-Reply-To: <eb79828c0709132112o5a3e7137n5ae5cd55e3e0b839@mail.gmail.com>
References: <eb79828c0709132112o5a3e7137n5ae5cd55e3e0b839@mail.gmail.com>
Message-ID: <2dc0c81b0709140644w629acda6vee05d589a2e54043@mail.gmail.com>

My best advice:

Skim it -- just flip the pages, glancing at each one without really
reading it -- maybe just read the bold type. You'll find that very
rewarding when you run into a problem in your coding and remember that
you saw *something* which could be related. You will probably notice
some built-in functions that you will need and possibly would have
re-invented if you didn't know they were there.

I don't really find it to be a "reading" book -- it's more of a
reference book. Flip through it, then keep it within reach of your
keyboard.

Shawn


From ldo at geek-central.gen.new_zealand  Mon Sep 10 03:52:26 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 10 Sep 2007 19:52:26 +1200
Subject: Does shuffle() produce uniform result ?
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
	<mailman.243.1187955760.32294.python-list@python.org>
	<tooru_honda-7C82D1.10432725082007@wvnews01.netvigator.com>
	<tooru_honda-58C552.20355225082007@wvnews01.netvigator.com>
	<tooru_honda-978B9E.11304526082007@wvnews01.netvigator.com>
	<slrnfdnojg.inr.apardon@rcpc42.vub.ac.be>
	<7xejhfbsjo.fsf@ruckus.brouhaha.com>
	<slrnfdpup6.inr.apardon@rcpc42.vub.ac.be>
	<7xabs39bin.fsf@ruckus.brouhaha.com>
	<13drijhfqlvlk96@corp.supernews.com> <fbvmg0$1p3$3@lust.ihug.co.nz>
	<7xhcm4pl5m.fsf@ruckus.brouhaha.com> <fc059c$aa2$6@lust.ihug.co.nz>
	<13e7roq4dbo6043@corp.supernews.com>
Message-ID: <fc2t3q$rik$3@lust.ihug.co.nz>

In message <13e7roq4dbo6043 at corp.supernews.com>, Steven D'Aprano wrote:

> On Sun, 09 Sep 2007 18:53:32 +1200, Lawrence D'Oliveiro wrote:
> 
>> In message <7xhcm4pl5m.fsf at ruckus.brouhaha.com>, Paul Rubin wrote:
>> 
>>> Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> writes:
>>>
>>>> Except that the NSA's reputation has taken a dent since they failed to
>>>> anticipate the attacks on MD5 and SHA-1.
>>> 
>>> NSA had nothing to do with MD5 ...
>> 
>> Nevertheless, it was their job to anticipate attacks on it. After all,
>> they call themselves the "National _Security_ Agency", don't they?
> 
> The NSA has many jobs, and doing public research in crypto is only one of
> them -- and a particularly small one at that. For all we know, they had
> an attack on MD5 ten years before anyone else and didn't tell anyone
> because keeping it secret made it useful for one of their other jobs.

Yes, but they're supposed to look after US _National_ security, not their
own security. Since people in strategic jobs make so much use of hash
functions in crypto, that means it is most certainly an important part of
the NSA's function to ensure that there are good hash functions available.
They've fallen down on that job.

>>> ... and it's to NSA's credit that SHA-1 held up for as long as it did.
>> 
>> But they have no convincing proposal for a successor. That means the gap
>> between the classified and non-classified state of the art has shrunk
>> down to insignificance.
> 
> I don't see how that follows.

Because previously, the NSA has done things that it took open researchers
years, even decades, to figure out. But not any more.


From steve at holdenweb.com  Mon Sep 17 07:02:14 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 17 Sep 2007 07:02:14 -0400
Subject: Python 3K or Python 2.9?
In-Reply-To: <1190013827.107324.111820@w3g2000hsg.googlegroups.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>	<46e7974d$0$31726$426a74cc@news.free.fr>	<fc8fc9$4qa$1@news2.carnet.hr>
	<5kq1hgF4r90oU1@mid.individual.net>	<1189618530.872819.136450@57g2000hsv.googlegroups.com>	<uir6ctto7.fsf@yahoo.com>
	<1190013827.107324.111820@w3g2000hsg.googlegroups.com>
Message-ID: <fclmrn$cuq$1@sea.gmane.org>

TheFlyingDutchman wrote:
>> The other half of the confusion is cleared up by considering that
>> Python methods are ordinary functions that don't magically "know" in
>> which "class" context they are executing: they must be told via the
>> first parameter.
>>
> 
> They can be told all they want by the compiler/runtime - implicitly -
> under-the-covers, out-of-sight.
> 
I wish you would keep these deep insightful comments to yourself. Your 
knowledge of the interpreter internals appears to be based on 
examination by crystal ball.

You conveniently ignore the fact that the situation described by David 
Trudgett (and, by the way, your quoting with no attributions is also 
becoming tiresome very quickly) is a *design choice*, not a mistake. 
It's done precisely to make an explicit reference to the instance 
available to methods.

You also conveniently ignore the fact that changing tis would also 
change other aspects of the language, such as the ability to graft 
functions into instances and classes as methods.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From w_a_x_man at yahoo.com  Sun Sep 30 16:06:39 2007
From: w_a_x_man at yahoo.com (William James)
Date: Sun, 30 Sep 2007 13:06:39 -0700
Subject: Delete spaces
In-Reply-To: <1191064960.624796.115790@d55g2000hsg.googlegroups.com>
References: <1190994234.526554.110870@y42g2000hsy.googlegroups.com>
	<1191064960.624796.115790@d55g2000hsg.googlegroups.com>
Message-ID: <1191182799.149749.174140@57g2000hsv.googlegroups.com>


John Machin wrote:
> On Sep 29, 1:43 am, kou... at hotmail.com wrote:
> > If I have a text file that is delimited by spaces, how do I import it
> > and get to comma delimited?  Here is a row of data from the text file:
> >
> > 1    1    10:55:14  2    65   8.5
> > 1.4+1.1                       2.5       Class-2   0
> >
> > I tried a few examples from the group and it didn't work, since the
> > file also has a header row and a row of seperators ( -------).  The
> > lengths of each row is something like 130, so there are extra spaces
> > after the last value as well.  I have tried joining and other things,
> > but I couldn't figure out how to get the values to come together.
> > Thanks.
> >
> > Kou
>
> It would help enormously if you could show us UNAMBIGUOUSLY what is in
> say the first 3 lines after the headings and separators -- do this:
>
> print repr(open("thefile", "rb").read()[:400])
>
> The other thing you need is to know enough about the file format to
> show us what is the CSV output that you require from the sample input
> -- we don't have crystal balls, and are likely to make half-donkeyed
> guesses, like these:
>
> If the spaces are really tabs, use line.split('\t')
>
> Otherwise: the file has fixed column widths, and any use of line.split
> will mangle it.
>
> The clumsy way to handle this is to count column positions, and write
> something ugly like:
> field1 = line[0:8]
> field2 = line[8:20]
> etc
>
> "a row of seperators ( -------)" sounds suspiciously like the "column
> aligned" format that can be produced by running a SQL query on a SQL
> Server database using MS's "Query Analyser". It looks like this:
>
> RecordType  ID1                  ID2         Description
> ----------- -------------------- ----------- ----------------------
> 1           12345678             123456      Widget
> 4           87654321             654321      Gizmoid
> etc
>
> Does your file look something like that? If so, then all you have to
> do is leverage off the fact that the second line has one-space gaps
> between each bunch of dashes, and you can write a little module that
> will read any file like that, just as though it were a CSV file.

If the fields are separated by whitespace, this Awk program can
handle the situation:

awk 'BEGIN{OFS=","} {$1=$1} 1' oldfile >newfile

If the fields are fixed-width and the 2nd line is a guide to those
widths,
then this Ruby program should work (not optimized for speed):

lines = IO.readlines( 'data2' )
# Dump header.
lines.shift
# Save column guide.
guide = lines.shift.scan( /-+ */ )
for line in lines do
  puts guide.map{|s| line.slice!(0,s.size).strip}.join(",")
end



From steve at holdenweb.com  Tue Sep 18 15:46:37 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 18 Sep 2007 15:46:37 -0400
Subject: can Python be useful as functional?
In-Reply-To: <871wcvlwly.fsf@rudin.co.uk>
References: <1190073045.618869.261290@k79g2000hse.googlegroups.com>	<fcoth7$ae0$1@sea.gmane.org>	<mailman.729.1190135451.2658.python-list@python.org>
	<871wcvlwly.fsf@rudin.co.uk>
Message-ID: <fcp9us$o8k$1@sea.gmane.org>

Paul Rudin wrote:
> Robin Becker <robin at reportlab.com> writes:
> 
>> Steve Holden wrote:
>>> Lorenzo Stella wrote:
>> ......
>>> So, which environment do you habitually use that provides an
>>> *unlimited* stack?
>>>
>>> You remind me of the conversation between the philosopher and an
>>> attractive lady whom he was seated next to at dinner. He asked her
>>> if she would sleep with him for a million dollars, to which she
>>> readily agreed. So he followed this by asking her if she'd sleep
>>> with him for a dollar. She replied: "No. Do you take me for a
>>> prostitutte?", to which his riposte was "We have already established
>>> that fact, and are now merely haggling about the price".
>>>
>> allegedly G B Shaw
>> (http://findarticles.com/p/articles/mi_qn4158/is_19980925/ai_n14182408)
> 
> Also allegedly Winston Churchill, although wikiquote says:
> 
>   "This is a very old joke where the participants vary dramatically
>    from each telling. It's very unlikely though not impossible that
>    the joke originated from Churchill."

Also allegedly Bertrand Russell, who was going to be the subject of my 
version until I realized that I would get many corrections to any 
asserted identity of the originator. I should have know to expect just 
as many corrections to the absence of any such assertion, this being 
c.l.py :-)

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From lew at lewscanon.com  Tue Sep 18 18:05:27 2007
From: lew at lewscanon.com (Lew)
Date: Tue, 18 Sep 2007 18:05:27 -0400
Subject: The meaning of  a = b  in object oriented languages
In-Reply-To: <s_LHi.111195$C95.5745789@phobos.telenet-ops.be>
References: <1190094057.976729.285120@n39g2000hsh.googlegroups.com>
	<fco0ev$hgj$1@news2.u-psud.fr>
	<s_LHi.111195$C95.5745789@phobos.telenet-ops.be>
Message-ID: <_4OdnQi5jow61m3bnZ2dnUVZ_tvinZ2d@comcast.com>

Roel Schroeven wrote:
> Laurent Pointal schreef:
>> Summercool a ?crit :
>>>
>>> The meaning of  a = b  in object oriented languages.
>>> ====================================================
>> <zip>
>>
>> Oups, reading the subject I thought it was a Xah Lee post.
> 
> me too ...

Nah, this dude's all right, so far.  As if my opinion mattered.

Stay with it, Summercool.  It's what discussion groups are for.

Here's why the reaction: cross-posting of computer-science-type essays, 
something Xah Lee does.  But he recycles all his decades-old crap and really 
doesn't participate in the discussion.  This isn't that at all.

-- 
Lew


From Shawn at Milochik.com  Wed Sep  5 13:03:38 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Wed, 5 Sep 2007 13:03:38 -0400
Subject: Text processing and file creation
In-Reply-To: <1189008809.718361.45790@g4g2000hsf.googlegroups.com>
References: <1189008809.718361.45790@g4g2000hsf.googlegroups.com>
Message-ID: <2dc0c81b0709051003n6b81493ah373ce626e172309e@mail.gmail.com>

On 9/5/07, malibuster at gmail.com <malibuster at gmail.com> wrote:
> I have a text source file of about 20.000 lines.
> >From this file, I like to write the first 5 lines to a new file. Close
> that file, grab the next 5 lines write these to a new file... grabbing
> 5 lines and creating new files until processing of all 20.000 lines is
> done.
> Is there an efficient way to do this in Python?
> In advance, thanks for your help.
>


I have written a working test of this. Here's the basic setup:




open the input file

function newFileName:
    generate a filename (starting with 00001.tmp).
    If filename exists, increment and test again (0002.tmp and so on).
    return fileName

read a line until input file is empty:

    test to see whether I have written five lines. If so, get a new
file name, close file, and open new file

    write line to file

close output file final time


Once you get some code running, feel free to post it and we'll help.


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Sep 24 07:29:48 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 24 Sep 2007 13:29:48 +0200
Subject: Writing Object Data to Disk
In-Reply-To: <mailman.941.1190565296.2658.python-list@python.org>
References: <1190443648.5838.6.camel@ubuntu-laptop>
	<mailman.941.1190565296.2658.python-list@python.org>
Message-ID: <46f79f99$0$30457$426a34cc@news.free.fr>

David a ?crit :
>> I would like to know if "Pickling" the class object is the only way of
>> writing it to disk for persistent storage. Also, do we have a concept
>> similar to "array of objects" in Python? The number of objects is only
>> known at "run-time".
> 
> Have a look at YAML.
> 
> http://freshmeat.net/projects/syck/
> 
> Also it is possible to persist python data to and from XML. See
> xml.marshal.generic.dumps

or JSON...


From byte8bits at gmail.com  Mon Sep 24 09:42:22 2007
From: byte8bits at gmail.com (byte8bits at gmail.com)
Date: Mon, 24 Sep 2007 06:42:22 -0700
Subject: Converting numbers to unicode charaters
Message-ID: <1190641342.127770.115610@y42g2000hsy.googlegroups.com>

Here's how I'm doing this right now, It's a bit slow. I've just got
the code working. I was wondering if there is a more efficient way of
doing this... simple example from interactive Python:

>>> word = ''
>>> hexs = ['42', '72', '61', '64']
>>> for h in hexs:
...   char = unichr(int(h, 16))
...   word += char
...   print char
...
B
r
a
d
>>> print word
Brad


Each hex_number is two digits. unichr converts that to a character
that I append to previous ints that have been converted to chars. In
this way, I convert a string of hex numbers to ints to letters, to
words.

Perhaps I'm doing it wrong... any tips?

Thanks,
Brad



From dotancohen at gmail.com  Sun Sep 16 11:18:21 2007
From: dotancohen at gmail.com (Dotan Cohen)
Date: Sun, 16 Sep 2007 17:18:21 +0200
Subject: Cannot formulate regex
Message-ID: <880dece00709160818h7463ec2apc5b54454315d32f6@mail.gmail.com>

I'd like to filter spam from a certain company. Here are examples of
strings found in their spam:
Mega Dik
Mega D1k
MegaDik
Mega. Dik
M eg ad ik
M E _G_A_D_ IK
M_E_G. ADI. K

I figured that this regex would match all but the second example, yet
it matches none:
|[^a-z]m[^a-z]e[^a-z]g[^a-z]a[^a-z]d[^a-z]i[^a-z]k[^a-z]|i

What would be the regex that matches "megadik" regardless of whatever
characters are sprinkled throughout?

Thanks in advance.

Dotan


From christopher.saunter at durham.ac.uk  Sun Sep 23 10:25:53 2007
From: christopher.saunter at durham.ac.uk (c d saunter)
Date: Sun, 23 Sep 2007 14:25:53 +0000 (UTC)
Subject: Getting rid of bitwise operators in Python 3?
References: <46f49740$0$32514$4c368faf@roadrunner.com>
Message-ID: <fd5t1h$216$1@heffalump.dur.ac.uk>

: arguments and dicts, which are lot more versatile.  Another major use, 
: talking to hardware, is not something oft done in Python either.

Are you sure?  I've been doing lots of exactly that for 4 years, and 
I'm not the only one round here...  Python makes an excellent language for 
talking to hardware.

cds


From jcd at sdf.lonestar.org  Fri Sep 21 17:53:10 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Fri, 21 Sep 2007 17:53:10 -0400
Subject: RE Help
In-Reply-To: <200709212209.29148.thomas@jollans.com>
References: <1190399985.324448.242610@d55g2000hsg.googlegroups.com>
	<200709212209.29148.thomas@jollans.com>
Message-ID: <46F43D45.3000600@sdf.lonestar.org>

Thomas Jollans wrote:
> On Friday 21 September 2007, byte8bits at gmail.com wrote:
>   
>> Not specific to Python, but it will be implemented in it... how do I
>> compile a RE to catch everything between two know values? Here's what
>> I've tried (but failed) to accomplish... the knowns here are START and
>> END:
>>
>> data = "asdfasgSTARTpruyerfghdfjENDhfawrgbqfgsfgsdfg"
>> x = re.compile('START.END', re.DOTALL)
>>
>> x.findall(data)
>>     
>
> I'm not sure finding a variable number of occurences can be done with re. How 
> about
>
> # data = the string
> strings = []
> for s in data.split('START')[1:]:
>     strings.append(s.split('END')[0])
>   
Nice.  I've noticed that since I switched from Perl to Python, I hardly
ever use regular expressions anymore.  In perl, they're so easy to fire
up that they become the first tool out of the toolbox, but when you make
the barrier to access just a tiny bit higher (import re/re.compile) you
start noticing how easy it is to accomplish most of those feats without
regexes, and much more readably, too.

Of course, it should be noted that the different implementations
suggested behave differently, which could also affect the choice of
method.  If you have "abcSTARTdefSTARTghiEND", your version will spit
out strings = ['def', 'ghi'], but a regex, depending on whether it is
greedy or non greedy, will either spit out ['STARTdefSTARTghiEND'] or
['STARTghiEND'].

Correction, it will spit out the first one, whether greedy or not.  The
difference comes with two END tags in a row.


Cheers,
Cliff


From bj_666 at gmx.net  Thu Sep 27 12:53:09 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 27 Sep 2007 16:53:09 GMT
Subject: comparing elements of a list with a string
References: <1190734785.439839.303030@50g2000hsm.googlegroups.com>
	<XLSdnddmo6KUq2TbnZ2dnUVZ_vShnZ2d@comcast.com>
	<mailman.1057.1190742568.2658.python-list@python.org>
	<1190889848.653434.178450@g4g2000hsf.googlegroups.com>
	<mailman.1154.1190896212.2658.python-list@python.org>
Message-ID: <5m25flFatlbuU3@mid.uni-berlin.de>

On Thu, 27 Sep 2007 08:16:59 -0400, Steve Holden wrote:

> Shriphani wrote:
>> Hello,
>> Would that mean that if I wanted to append all the (date, time) tuples
>> to a list, I should do something like:
>> 
>> for file in list_of_backup_files:
>>     some_list.append(file)
> 
> That would be one way to do it (assuming you started with some_list as 
> an empty list). But a faster way would be to use a list comprehension 
> and say
> 
> some_list = [f for f in list_of_backup_files]

Or:

some_list = list(list_of_backup_files)

If `some_list` is not empty:

some_list.extend(list_of_backup_files)

Ciao,
	Marc 'BlackJack' Rintsch


From erik at myemma.com  Fri Sep 28 10:37:15 2007
From: erik at myemma.com (Erik Jones)
Date: Fri, 28 Sep 2007 09:37:15 -0500
Subject: Python 3.0 migration plans?
In-Reply-To: <fdhknb$has$1@sea.gmane.org>
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<fdhja4$qdk$1@daisy.noc.ucla.edu> <fdhknb$has$1@sea.gmane.org>
Message-ID: <8D62705E-2E4D-4F97-9553-9B1460923057@myemma.com>


On Sep 27, 2007, at 8:17 PM, Steve Holden wrote:

> James Stroud wrote:
>> Steve Holden wrote:
>>> I wondered if a straw poll could get some idea of readers' thoughts
>>> about when they will be migrating to 3.0 on, so I used the new  
>>> widget on
>>> Blogger to add a poll for that.
>>>
>>> I'd appreciate if if you would go to
>>>
>>>   http://holdenweb.blogspot.com/
>>>
>>> and register your vote on your intended migration timescale.
>>>
>>> Thanks!
>>
>> I'm going to abstain voting until 'public beta + about 1 year' is  
>> a choice.
>>
> Richard Jones wrote:
>> I'll use the "no plans" response for my actual "no simple answer"  
>> real
>> response.
>>
>>
> So what we need is a poll on what the questions should be. I *love*  
> c.l.py.

Does professional vs. personal use matter here?  What if I plan to  
switch in the morning or at midnight on the first solstice after the  
second alpha release?  Is Mercury or Venus in retrograde?  These  
things matter... :)

Erik Jones

Software Developer | Emma?
erik at myemma.com
800.595.4401 or 615.292.5888
615.292.0777 (fax)

Emma helps organizations everywhere communicate & market in style.
Visit us online at http://www.myemma.com




From cjt22 at bath.ac.uk  Tue Sep 11 04:08:39 2007
From: cjt22 at bath.ac.uk (cjt22 at bath.ac.uk)
Date: Tue, 11 Sep 2007 01:08:39 -0700
Subject: Using a time duration to print out data where every 2 seconds is
	a pixel
In-Reply-To: <6hice3hjf9r8tv6ru5pm7rhldge0cd3pra@4ax.com>
References: <1189427545.322679.260970@r29g2000hsg.googlegroups.com>
	<slrnfeaips.m47.hat@se-162.se.wtb.tue.nl>
	<mailman.319.1189432713.2658.python-list@python.org>
	<1189436278.456311.128260@22g2000hsm.googlegroups.com>
	<6hice3hjf9r8tv6ru5pm7rhldge0cd3pra@4ax.com>
Message-ID: <1189498119.318745.242690@y42g2000hsy.googlegroups.com>

On Sep 11, 8:58 am, Tim Roberts <t... at probo.com> wrote:
> cj... at bath.ac.uk wrote:
> >Thanks however I am still having a problem using the time module for
> >arithmetic
>
> >My string times are of values such as 09:55:17
>
> >and I have code such as:
>
> >>from time import *
> >>startPoint = strptime(step.sTime, "%H:%S:%M")
> >>finishPoint = strptime(step.fTime, "%H:%S:%M")
>
> Your conversion strings cannot be correct.  Sure, there are international
> differences in rendering dates and times, but not even in Eastern
> WhereTheHeckIsStan do they encode hours, then seconds, then minutes.
> --
> Tim Roberts, t... at probo.com
> Providenza & Boekelheide, Inc.

Sorry I meant %H:%M:%S just wrote it wrong! Any advice on how to print
out the duration though would be much appreciated.
I think I have now got the time conversion problems sorted thanks to
the help from google groups!



From vijayeee at gmail.com  Wed Sep  5 07:15:44 2007
From: vijayeee at gmail.com (vijayca)
Date: Wed, 05 Sep 2007 11:15:44 -0000
Subject: Looping through File Question
In-Reply-To: <1188989934.436165.213680@w3g2000hsg.googlegroups.com>
References: <1188989934.436165.213680@w3g2000hsg.googlegroups.com>
Message-ID: <1188990944.650558.153230@22g2000hsm.googlegroups.com>

On Sep 5, 3:58 pm, planetmatt <planetm... at gmail.com> wrote:
> I am a Python beginner.  I am trying to loop through a CSV file which
> I can do.  What I want to change though is for the loop to start at
> row 2 in the file thus excluding column headers.
>
> At present I am using this statement to initiate a loop though the
> records:
>
> for line in f.readlines():
>
> How do I start this at row 2?

just use readline() method...this will move the file pointer to the
next line....
example:
fd=open("/tmp.txt","r")
fd.readline()                ##THIS MOVES THE FILE POINTER TO THE
SECOND LINE

now carry on with...
for line in f.readlines():   #THIS WILL BEGIN WITH THE SECOND ROW AS
THE FILE POINTER IS IN 2NDLINE
  ....



From michele.simionato at gmail.com  Wed Sep 19 23:11:04 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Thu, 20 Sep 2007 03:11:04 -0000
Subject: Mixin classes and single/multiple inheritance (was: super()
	doesn't get superclass)
In-Reply-To: <877immvye0.fsf_-_@benfinney.id.au>
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au>
	<46f0fba0$0$29605$426a34cc@news.free.fr>
	<1190199134.791808.267110@22g2000hsm.googlegroups.com>
	<mailman.778.1190225664.2658.python-list@python.org>
	<1190256493.827576.139470@r29g2000hsg.googlegroups.com>
	<877immvye0.fsf_-_@benfinney.id.au>
Message-ID: <1190257864.945639.199230@k79g2000hse.googlegroups.com>

On Sep 20, 4:55 am, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> Michele Simionato <michele.simion... at gmail.com> writes:
> > I am not against mixins (even if I am certainly very much against
> > the *abuse* of mixins, such as in Zope 2). What I would advocate
> > (but I realize that it will never happen in Python) is single
> > inheritance + mixins a la Ruby.
>
> For those unfamiliar with Ruby, could you explain how you see this
> being done in Python?

I don't see this being done in Python, it is too late now (for
backward compatibility and all that). But you can still do it
by yourself, the simplest thing being copying the methods
of the mixin class. It is already possible to use a syntax
like this

 class MyClass(Base):
    mixin(Mixin1, Mixin2, ...)

using P.J. Eby's trick for implementing what he calls class
decorators (see also http://www.phyast.pitt.edu/~micheles/python/classinitializer.html)

But I would not use it, let's use the language we have, not
to invent our own.

> What do you see as an appropriate use of mixin classes, and what an
> abuse?

An example of fine usage of mixin is Tkinter; an example of
bad usage if Zope 2. In any case, I think using composition
in the end is a better solution than mixins (it
is much more scalable).

> What would the semantics be in Python for "single inheritance + mixins
> a la Ruby"? Can you give example syntax?
>

Already done. Since all hierarchies would be flat, super syntax
would be trivial as in Ruby/Java/etc (self.super.meth(args, kw)).

           Michele Simionato



From bbxx789_05ss at yahoo.com  Mon Sep 24 04:57:05 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Mon, 24 Sep 2007 01:57:05 -0700
Subject: vim - what's a smarttab?
Message-ID: <1190624225.926815.149720@50g2000hsm.googlegroups.com>

Is smarttab one of these:

1) Expands tabs into the number of spaces set with tabstop at the
start of a line, and uses a tabstop sized tab elsewhere.

2) Expands tabs into the number of spaces set with shiftwidth at the
start of a line, and expands tabs into the number spaces set with
tabstop elsewhere.

3) Doesn't do any expanding: uses shiftwidth sized tabs at beginning
of line, and tabstop sized tabs elsewhere.

Alternatively, what is a smarttab?

Thanks.



From koutoo at hotmail.com  Thu Sep 27 12:33:34 2007
From: koutoo at hotmail.com (koutoo at hotmail.com)
Date: Thu, 27 Sep 2007 09:33:34 -0700
Subject: True of False
Message-ID: <1190910814.594559.30880@n39g2000hsh.googlegroups.com>

I tried writing a true and false If statement and didn't get
anything?  I read some previous posts, but I must be missing
something.  I just tried something easy:

a = ["a", "b", "c", "d", "e", "f"]

if "c" in a == True:
     Print "Yes"

When I run this, it runs, but nothing prints.  What am I doing wrong?
Thanks.

Kou



From gdi.promoter at gmail.com  Thu Sep 20 02:01:38 2007
From: gdi.promoter at gmail.com (GDI groups)
Date: Wed, 19 Sep 2007 23:01:38 -0700
Subject: Income for life
Message-ID: <1190268098.206437.10150@i13g2000prf.googlegroups.com>

Hi, all

I'm recommended GDI website http://www.globalrichonline.com/

You can make the money online 100%

Good day.



From steve at holdenweb.com  Fri Sep 28 13:57:57 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 28 Sep 2007 13:57:57 -0400
Subject: Python 3.0 migration plans?
In-Reply-To: <1191000394.828693.285210@k79g2000hse.googlegroups.com>
References: <mailman.1195.1190936289.2658.python-list@python.org>	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>	<87641v4j38.fsf@benfinney.id.au>	<1190949502.875203.57690@w3g2000hsg.googlegroups.com>	<5m3p1dFbl98pU1@mid.uni-berlin.de>	<1190968707.799398.232550@19g2000hsx.googlegroups.com>	<5m4126FbgjabU1@mid.uni-berlin.de>	<1190993122.979034.305060@50g2000hsm.googlegroups.com>	<mailman.1236.1190995515.2658.python-list@python.org>	<1190997769.002795.59450@57g2000hsv.googlegroups.com>	<5m4qc2Fbbk19U1@mid.uni-berlin.de>
	<1191000394.828693.285210@k79g2000hse.googlegroups.com>
Message-ID: <46FD40A5.8030504@holdenweb.com>

TheFlyingDutchman wrote:
> On Sep 28, 10:01 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>> On Fri, 28 Sep 2007 09:42:49 -0700, TheFlyingDutchman wrote:
>>> Which of the common languages have higher order functions and what is
>>> the syntax?
>> C, C++, Pascal, Perl, PHP, Ruby have them.  And of course the functional
>> languages, most notably Lisp and Scheme as you asked for common languages.
>>
>> Don't know if C#'s delegates qualify.
>>
>> Ciao,
>>         Marc 'BlackJack' Rintsch
> 
> What is the syntax of a higher order function in C, C++ and Pascal?
> 
This is like listening to a four-year-old torment its parents with 
incessant questions. Do you *have* to ask every question that pops into 
your mind?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline


From f.guerrieri at gmail.com  Mon Sep 10 03:55:33 2007
From: f.guerrieri at gmail.com (Francesco Guerrieri)
Date: Mon, 10 Sep 2007 09:55:33 +0200
Subject: concise code (beginner)
In-Reply-To: <13e9taoa44icgb4@corp.supernews.com>
References: <13dsvqrqivtf092@corp.supernews.com>
	<13dv4uqqb806ff0@corp.supernews.com> <fbqo83$8fd$1@lust.ihug.co.nz>
	<13e99756io95p66@corp.supernews.com> <fc2c86$i1l$4@lust.ihug.co.nz>
	<13e9taoa44icgb4@corp.supernews.com>
Message-ID: <79b79e730709100055v50839390g28848e5e9d920d00@mail.gmail.com>

On 9/10/07, bambam <david at asdf.asdf> wrote:
>
> I have a number of  news readers here, but all of them work
> better  with top-posting, and in none of them is top posting
> a problem. What software are you using?
>
> Steve.
>

I use gmail and I can assure you that top posting is annoying.

francesco
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From techwr-l-bounces at lists.techwr-l.com  Mon Sep 17 20:49:27 2007
From: techwr-l-bounces at lists.techwr-l.com (techwr-l-bounces at lists.techwr-l.com)
Date: Mon, 17 Sep 2007 18:49:27 -0600
Subject: You have been unsubscribed from the TECHWR-L mailing list
Message-ID: <mailman.0.1190076567.8781.techwr-l@lists.techwr-l.com>

We're sorry to see that you're leaving TECHWR-L. If there is anything
you believe TECHWR-L should have offered but didn't, or if there are
any other suggestions you may have for the list, please feel free to
write directly to us.

TECHWR-L Administrators admin at techwr-l.com


From paddy3118 at googlemail.com  Sat Sep 15 11:58:59 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Sat, 15 Sep 2007 15:58:59 -0000
Subject: regexp search on infinite string?
In-Reply-To: <1189861667.962508.76850@57g2000hsv.googlegroups.com>
References: <1189802940.518794.129130@r29g2000hsg.googlegroups.com>
	<1189860966.073168.33840@50g2000hsm.googlegroups.com>
	<1189861667.962508.76850@57g2000hsv.googlegroups.com>
Message-ID: <1189871939.267407.114000@n39g2000hsh.googlegroups.com>

On Sep 15, 2:07 pm, John Machin <sjmac... at lexicon.net> wrote:
> On Sep 15, 10:56 pm, Paddy <paddy3... at googlemail.com> wrote:
>
>
>
> > On Sep 14, 9:49 pm, Paddy <paddy3... at googlemail.com> wrote:
>
> > > Lets say i have a generator running that generates successive
> > > characters of a 'string'>From what I know, if I want to do a regexp search for a pattern of
>
> > > characters then I would have to 'freeze' the generator  and pass the
> > > characters so far to re.search.
> > > It is expensive to create successive characters, but caching could be
> > > used for past characters. is it possible to wrap the generator in a
> > > class, possibly inheriting from string, that would allow the regexp
> > > searching of the string but without terminating the generator? In
> > > other words duck typing for the usual string object needed by
> > > re.search?
>
> > > - Paddy.
>
> > There seems to be no way of breaking into the re library accessing
> > characters from the string:
>
> > >>> class S(str):
>
> > ...     def __getitem__(self, *a):
> > ...             print "getitem:",a
> > ...             return str.__getitem__(self, *a)
> > ...     def __get__(self, *a):
> > ...             print "get:",a
> > ...             return str.__get__(self, *a)
> > ...>>> s = S('sdasd')
> > >>> m = re.search('as', s); m.span()
> > (2, 4)
> > >>> m = sre.search('as', s); m.span()
> > (2, 4)
> > >>> class A(array.array):
>
> > ...     def __getitem__(self, *a):
> > ...             print "getitem:",a
> > ...             return str.__getitem__(self, *a)
> > ...     def __get__(self, *a):
> > ...             print "get:",a
> > ...             return str.__get__(self, *a)
> > ...
>
> > >>> s = A('c','sdasd')
> > >>> m = re.search('as', s); m.span()
> > (2, 4)
> > >>> m = sre.search('as', s); m.span()
> > (2, 4)
>
> > - Paddy.
>
> That would no doubt be because it either copies the input [we hope
> not] or more likely because it hands off the grunt work to a C module
> (_sre).

Yes, it seems to need a buffer/string so probably access a contiguous
area of memory from C.
o
>
> Why do you want to "break into" it, anyway?

A simulation generates stream of data that could be gigabytes from
which I'd like to find interesting bits by doing a regexp search. I
could use megabyte length sliding buffers, and probably will have to.

- Paddy.



From orsenthil at gmail.com  Mon Sep  3 14:12:11 2007
From: orsenthil at gmail.com (O.R.Senthil Kumaran)
Date: Mon, 3 Sep 2007 23:42:11 +0530
Subject: 400 Bad Request calling urllib2.urlopen()
In-Reply-To: <1188824817.761125.190520@k79g2000hse.googlegroups.com>
References: <1188824817.761125.190520@k79g2000hse.googlegroups.com>
Message-ID: <20070903181211.GB5077@gmail.com>

> I have an url which redirects the client to another url. If I paste
> the url into a browser, it works fine. If I open it via

Any redirection is setup using either of the 301, 302, 303, 307 return codes of HTTP. Atleast, thats what standard determines.

>   File "C:\Python25\lib\urllib2.py", line 575, in http_error_302
>     return self.parent.open(new)

Here we see that redirect handler http_error_302 has taken effect.

>   File "C:\Python25\lib\urllib2.py", line 499, in http_error_default
>     raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
> urllib2.HTTPError: HTTP Error 400: Bad Request

The redirected page is not getting fetched by the OpenerDirector of urllib2. This could be due to various reasons.
- the protocol is unsupported.
- there is some prevention from accessing the resource directly.

If its possible, can you share the url which is throwing this error?
To me, it does seem urllib2 issue, it could be the (improper ??) redirection setup at webserver.


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

-- 
O.R.Senthil Kumaran
http://uthcode.sarovar.org


From kskuhlman at gmail.com  Tue Sep 25 21:41:31 2007
From: kskuhlman at gmail.com (Ken Kuhlman)
Date: Wed, 26 Sep 2007 01:41:31 -0000
Subject: Best way to do attribute docstrings?
In-Reply-To: <1189540345.260656.115760@q5g2000prf.googlegroups.com>
References: <1189195567.238990.54440@57g2000hsv.googlegroups.com>
	<mailman.262.1189214761.2658.python-list@python.org>
	<1189540345.260656.115760@q5g2000prf.googlegroups.com>
Message-ID: <1190770891.044084.123540@50g2000hsm.googlegroups.com>

Replying to myself in case someone finds this interesting.

Anyway, I took another shot at this with a little fresher mind, and it
was quickly obvious that I was trying to force attributes to behave
more like classes.  It was a small step from there to creating a
factory function to return instances of the appropriate class.  I'm
much happier with the result than either of the two previously posted
kludges.


# A factory function for generating attributes that can be annotated.
def attr(value, doc=None):
    base = type(value)
    if base == bool:
        # bool class can't be used as a base, so we make one that can.
        class MyBool(int):
            def __str__(self):
                return str(bool(self))
            __repr__ = __str__
        base = MyBool

    class FancyAttr(base):
        pass

    fa = FancyAttr(value)
    fa.__doc__ = doc
    return fa


class Animal(object):
    four_legs = attr(value = True, doc = "Animal has four legs")
    favorite_food = attr('cheese', doc = "Animal's favorite food")
    has_fur = attr(False)
    has_fur.__doc__ "Animal has fur"

print Animal.four_legs.__doc__, '::', Animal.four_legs
print Animal.favorite_food.__doc__, '::', Animal.favorite_food
print Animal.has_fur.__doc__, '::', Animal.has_fur




From fakeaddress at nowhere.org  Sun Sep  2 03:49:26 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Sun, 02 Sep 2007 07:49:26 GMT
Subject: So what exactly is a complex number?
In-Reply-To: <lbjpq4-eo22.ln1@ozzie.tundraware.com>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>	<mailman.212.1188576194.28954.python-list@python.org>	<451mq4-les.ln1@ozzie.tundraware.com>
	<mailman.266.1188644067.28954.python-list@python.org>
	<lbjpq4-eo22.ln1@ozzie.tundraware.com>
Message-ID: <aWtCi.12917$3x.3718@newssvr25.news.prodigy.net>

Tim Daneliuk wrote:
> Grzegorz S?odkowicz wrote:
[...]
>> You're mixing definition with application. You didn't say a word about 
>> what complex numbers are, not a word about the imaginary unit, where 
> 
> I was trying to motivate the idea by means of analogy.  This is a
> legitimate thing to do.  It helps lead people to a conceptual understanding
> long before they understand the minutae.   I am well aware of the
> imaginary unit and from whence complex analysis springs.  I just didn't
> think that was the best place to start explicating the *concept*.

Gotta side with Grzegorz on this. Simplifying an explanation
of complex numbers to the point of omitting the imaginary unit
helps lead people to a conceptual *misunderstanding*. I don't
like feeling confused, but where I really screw up is where I
think I understand what I do not.


-- 
--Bryan


From deets at nospam.web.de  Mon Sep  3 08:22:14 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 03 Sep 2007 14:22:14 +0200
Subject: TypeError: 'module object is not callable'
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<mailman.315.1188810174.28954.python-list@python.org>
	<46dbd11e$0$6228$426a74cc@news.free.fr>
	<mailman.317.1188812089.28954.python-list@python.org>
	<1188816626.021956.281040@22g2000hsm.googlegroups.com>
Message-ID: <5k2cjmF1r2aiU1@mid.uni-berlin.de>

 christophertidy at hotmail.com wrote:

> Thank you for your help that seems to have done the trick.
> You are correct Diez B. Roggisch that I come from a java background!
> 
> I have a new tiny problem I can't understand either.
> Withing Step.py I have the following method
> 
> def isCompleted(self):
>     "Check whether data step has been processed"
>     return self.isCompleted
> 
> Then within main.py I simply wish to print the value of isCompleted
> which I try to do by the following
> print 'Magn completed status is',a.isCompleted()
> 
> Which returns the following error:
>     a.isCompleted()
> TypeError: 'int' object is not callable
> 
> I have tried ideas such as int(a.isCompleted) but to no prevail. Any
> ideas?

The others spottet the error I missed. But I can offer something else:

http://dirtsimple.org/2004/12/python-is-not-java.html

It's a worthy read for someone coming from Java, needing time to adjust.

Diez


From f.guerrieri at gmail.com  Tue Sep 18 15:10:10 2007
From: f.guerrieri at gmail.com (Francesco Guerrieri)
Date: Tue, 18 Sep 2007 21:10:10 +0200
Subject: Newbie question
In-Reply-To: <1190139661.046103.45440@19g2000hsx.googlegroups.com>
References: <1190139661.046103.45440@19g2000hsx.googlegroups.com>
Message-ID: <79b79e730709181210m72a39ea7xa0aeed9dcfa44f20@mail.gmail.com>

On 9/18/07, koutoo at hotmail.com <koutoo at hotmail.com> wrote:
> If I have a file name: AVC1030708.14.  How do I strip out certain
> characters from the file name?  I am so used to using MID, LEFT, and
> RIGHT functions, that I have no idea how to do this in python?  I have
> had trouble as well with most newbies on finding the help.  But I have
> used the command line built in help, but with no luck.  Thanks.
>
> Kou

As a newbie, you would do well to read and study the tutorial which
you can find at http://docs.python.org/tut/tut.html

In particular there is an interesting section on Strings:
http://docs.python.org/tut/node5.html#SECTION005120000000000000000

and
http://docs.python.org/lib/string-methods.html

Francesco


From aboudouvas at panafonet.gr  Mon Sep  3 06:19:40 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: Mon, 03 Sep 2007 03:19:40 -0700
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
In-Reply-To: <87tzqc9jda.fsf@benfinney.id.au>
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<1188803759.498517.198900@g4g2000hsf.googlegroups.com>
	<87tzqc9jda.fsf@benfinney.id.au>
Message-ID: <1188814780.980563.158150@57g2000hsv.googlegroups.com>

I was wondering (and maybe i still do) about this GIL "problem". I am
relatively new to Python (less than a year) and when i started to
think about it i said: "Oh, this IS a problem". But when i dig a
little more, i found that "Ah, maybe it isn't".
I strongly believe that the best usage of multiple cores processor
will be achieved if programming languages are modified to support this
on their "hearts". Code blocks that would be identified by the
compiler and run in parallel and such things. Laboratories are working
on these stuff but i do not expect something in the very-near future.

So, as i mentioned above, there are solutions for that right now
("parallel python" and others) that enabled us with little effort to
spawn a new python interpreter, thus allowing the OS to schedule it on
a different core and do the job this way relatively cheap.
I wouldn't recommend going to IronPython despite the fact that the CLR
better utilize MP. The reason for this is that i would NEVER give up
the freedom that CPython gives me by exchange "better" usage of the MP
and platform lock-in.



From steve at REMOVE-THIS-cybersource.com.au  Sun Sep 16 08:53:30 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sun, 16 Sep 2007 12:53:30 -0000
Subject: generate list of partially accumulated values
References: <1189936564.932553.148800@50g2000hsm.googlegroups.com>
	<1189936979.276166.103080@w3g2000hsg.googlegroups.com>
	<1189937183.100462.175070@o80g2000hse.googlegroups.com>
	<1189938119.469599.171960@w3g2000hsg.googlegroups.com>
Message-ID: <13eq9qak4pbqr3f@corp.supernews.com>

On Sun, 16 Sep 2007 10:21:59 +0000, cesco wrote:

> The list is composed of objects:
> l = [obj1, obj2, obj3, obj4]
> and I need to call a method (say method1) on each object as follow: l1 =
> [obj1.method1(obj2), obj2.method1(obj3), obj3.method1(obj4), obj4]
> 
> Is there a clean way of doing this?

Yes, write a function that loops over the list doing what you want. Not 
everything needs to be a one-liner.


-- 
Steven.


From cai.haibin at gmail.com  Wed Sep 26 18:56:51 2007
From: cai.haibin at gmail.com (james_027)
Date: Wed, 26 Sep 2007 22:56:51 -0000
Subject: regex with specific list of string
In-Reply-To: <mailman.1126.1190830418.2658.python-list@python.org>
References: <1190821357.753909.178210@50g2000hsm.googlegroups.com>
	<fde2i4$9k1$1@sea.gmane.org>
	<1190827835.3397.76.camel@dot.uniqsys.com>
	<mailman.1126.1190830418.2658.python-list@python.org>
Message-ID: <1190847411.999166.87060@w3g2000hsg.googlegroups.com>

Hi all,

> This is fine IMO since the OP didn't specify the opposite.
>

Thanks for all your replies, though I don't understand quite well the
going argument? What do you mean when you say "the OP didn't specify
the opposite"?

There reason for using regex is because I am going to use it in
Django's URL pattern

Thanks
james



From jjl at pobox.com  Sat Sep 22 03:27:56 2007
From: jjl at pobox.com (John J. Lee)
Date: Sat, 22 Sep 2007 07:27:56 GMT
Subject: frange() question
References: <fctrc1$doh$1@news.nems.noaa.gov> <87tzppjhe4.fsf@pobox.com>
	<mailman.827.1190318121.2658.python-list@python.org>
Message-ID: <87lkaz40sj.fsf@pobox.com>

Carsten Haese <carsten at uniqsys.com> writes:

> On Thu, 2007-09-20 at 18:55 +0000, John J. Lee wrote:
>> Functions are never generators, senso stricto.  There are "generator
>> functions", which *return* (or yield) generators when you call them.
>
> Actually, a generator function is a function that returns a generator.

Read what I wrote again.  What makes you begin your sentence with
"Actually", rather than "Putting it another way"?


[...snip more sensible stuff I must assume was directed at the OP...]


John


From bronger at physik.rwth-aachen.de  Thu Sep  6 18:42:53 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Fri, 07 Sep 2007 00:42:53 +0200
Subject: why should I learn python
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
	<LC_Di.8274$924.7987@newssvr23.news.prodigy.net>
	<1189117798.506367.278560@y42g2000hsy.googlegroups.com>
Message-ID: <874pi7tnyq.fsf@wilson.homeunix.com>

Hall?chen!

windandwaves writes:

> On Sep 7, 9:50 am, James Stroud <jstr... at mbi.ucla.edu> wrote:
>> Seewww.python.org. Trust us all when we say that its the best.
>>
>
> I get that feeling - yes.  Question is:
>
> 1. what is it good for?
> 2. why is it so good?

Your questions are very general.  I think it is best to do some
Internet research on it instead of asking in newsgroups.  Newsgroups
or web forums become interesting when you have more specific
questions.

When I chose my new favourite language 2.5 years ago, I also used
Goggle for it.  There is a lot of material about Python out there.
You may start on Wikipedia, and you may look for "Python
v. another-language" pages.  They are often very informative.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From jscrerar at compuserve.com  Sat Sep 29 18:17:49 2007
From: jscrerar at compuserve.com (Jim)
Date: Sat, 29 Sep 2007 15:17:49 -0700
Subject: Command-line does work when scheduled
In-Reply-To: <mailman.1289.1191100817.2658.python-list@python.org>
References: <1191098074.342460.52130@n39g2000hsh.googlegroups.com>
	<mailman.1289.1191100817.2658.python-list@python.org>
Message-ID: <1191104269.578536.56470@g4g2000hsf.googlegroups.com>

On Sep 29, 3:19 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Sat, 29 Sep 2007 17:34:34 -0300, Jim <jscre... at compuserve.com> escribi?:
>
> > I want to schedule a Python program that reads the command line for
> > input.  However, when adding an argument to the command line Python
> > will not pick it up when using Windows scheduled tasks.
>
> > How do I get it to work?
>
> Do you write the command line when defining the task? Using double quotes  
> around arguments with spaces?
> It works fine for me.
>
> --
> Gabriel Genellina

I ran the following on the Scheduled Tasks:
   "J:\Jim Crerar\MyPython\Zero_OE_Counter\Zero_OE_Counter.py"  n
   "J:\Jim Crerar\MyPython\Zero_OE_Counter\Zero_OE_Counter.py  n"
   "J:\Jim Crerar\MyPython\Zero_OE_Counter\Zero_OE_Counter.py"  "n"
None of them work.
However, no problem with running from *.bat file or directly from
shortcut on my Desktop.
Thanks,
Jim



From cjt22 at bath.ac.uk  Mon Sep 10 08:32:25 2007
From: cjt22 at bath.ac.uk (cjt22 at bath.ac.uk)
Date: Mon, 10 Sep 2007 05:32:25 -0700
Subject: Using a time duration to print out data where every 2 seconds is a
	pixel
Message-ID: <1189427545.322679.260970@r29g2000hsg.googlegroups.com>

Hi there, I wonder if any of you could tell me the best way to going
about solving this little problem!

I have a list of Step objects containing their start and finish times
The steps are sorted so that they are in order of their step times
The start and finish times are in string format of "%H:%S:%M" all on
the same day

I want to be able print out the Steps as a visual representation so
that I can show
1. The order the steps started
2. The duration of the steps

i.e. a print out such as:


[    a    ]
           [ b ]
      [             c           ]

so:
[ stepName ] is the duration of the Step (i.e. 1 pixel for every 2
seconds it lasted)
[  a ] started first so it is printed first,   [ b ] started x seconds
later so it is printed y pixels tabbed away form the side etc etc

Any help would be much appreciated.

Another related question is that I can't seem to do arithmetic when
the variables are in String format
of  %H:%M:%S or converted to type struct_time

i.e.
> startPoint = strptime(step.sTime, "%H:%S:%M")
> finishPoint = strptime(step.fTime, "%H:%S:%M")
> duration = finishPoint - startPoint

generates a error:
Type error: unsupport operand types for: 'time.struct_time' and
'time.struct_time'

trying to do time arithmetic when the times are stored in this format
as strings also fails so any help regarding any of this would be muhc
appreciated



From BjornSteinarFjeldPettersen at gmail.com  Thu Sep 20 03:50:20 2007
From: BjornSteinarFjeldPettersen at gmail.com (thebjorn)
Date: Thu, 20 Sep 2007 07:50:20 -0000
Subject: Sets in Python
In-Reply-To: <1190260923.243865.312190@z24g2000prh.googlegroups.com>
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
	<CeB*qHeVr@news.chiark.greenend.org.uk>
	<1190235483.412972.81280@v23g2000prn.googlegroups.com>
	<13f3m15igkstq2e@corp.supernews.com>
	<1190260923.243865.312190@z24g2000prh.googlegroups.com>
Message-ID: <1190274620.912027.322880@50g2000hsm.googlegroups.com>

On Sep 20, 6:02 am, Karthik Gurusamy <kar1... at gmail.com> wrote:
> On Sep 19, 7:17 pm, Steven D'Aprano <st... at REMOVE-THIS-
>
[...]
> > (2) Allow the hash of mutable objects to change, which means you can use
> > mutable objects as keys in dicts but if you change them, you can no
> > longer find them in the dict. They'll still be there, using up memory,
> > but you can't get to them.
>
> In the new model, at the time of addition, you need to remember the
> key at that time. If it's a list, you make a copy of the items.

Eek! Barf! Gag me with a spoon! etc. etc. :-)

And you mean a deep-copy, not just a copy, right?

Or perhaps you were thinking of something like this (mdict ::= mutable
dict):

class mdict(dict):
    def __setitem__(self, k, val):
        super(mdict,self).__setitem__(`k`, val)
    def __getitem__(self, k):
        return super(mdict,self).__getitem__(`k`)
    def __contains__(self, k):
        return super(mdict,self).__contains__(`k`)
    def keys(self):
        return list(eval(k) for k in super(mdict,self).keys())
    def __iter__(self):
        for k in super(mdict,self).__iter__():
            yield eval(k)
    def items(self):
        return list((eval(k),v) for k,v in super(mdict,self).items())
    def __repr__(self):
        items = ', '.join('%s: %s' % (k,repr(v)) for k,v in
self.items())
        return '{' + items + '}'

I think it does what you want..?:

>>> m = mdict()
>>> a, b = [], [1,2]
>>> print m
{}
>>> m[a] = a
>>> m[b] = b
>>> m
{[1, 2]: [1, 2], []: []}
>>> m.keys()
[[1, 2], []]
>>> for k in m:
...     m[k].append('foo')
...
>>> m
{[1, 2]: [1, 2, 'foo'], []: ['foo']}
>>> m.items()
[([1, 2], [1, 2, 'foo']), ([], ['foo'])]
>>> m.values()
[[1, 2, 'foo'], ['foo']]
>>> a in m
False
>>> a
['foo']
>>> b
[1, 2, 'foo']
>>> [] in m
True
>>> [1,2] in m
True
>>> m[{'key':['val']}] = 'this works too'

It'll work for all keys, k, where eval(`k`) == k, and repr(a) ==
repr(b) when a == b (I'm pretty sure the latter isn't always true for
dicts, although I haven't looked at the implementation.)

-- bjorn



From cjw at sympatico.ca  Mon Sep 17 20:15:44 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Mon, 17 Sep 2007 20:15:44 -0400
Subject: Use GUI for Python
In-Reply-To: <1190044523.666991.273910@y42g2000hsy.googlegroups.com>
References: <1190043073.093736.272750@k79g2000hse.googlegroups.com>
	<1190044523.666991.273910@y42g2000hsy.googlegroups.com>
Message-ID: <46EF18B0.1060505@sympatico.ca>

Jason wrote:
> On Sep 17, 9:31 am, kou... at hotmail.com wrote:
>> I am new to python as I have been a VB programmer.  I am used to the
>> GUI interface, and was wondering if I had to choose between a GUI for
>> Python, which one should I go with?  Thanks.
>>
>> Kou
> 
> You need to be more specific.  Do you mean that you are used to
> working in an IDE environment, where you can readily access the list
> of classes, methods, and such?  You might be interested in Eclipse
> [1], then installing the PyDev [2] plug-in to add Python support.
> Wing-IDE [3] and Komodo [4] may also be very suitable (but they cost
> money).
> 
> If you mean that you want to develop programs with a GUI interface,
> then you have a number of choices [5].  Most of these choices do not
> work in the same way that Microsoft Studio's GUI designer works,
> partly because Python isn't tied to any of them.
>   o  wxWidgets is MFC-like
>   o  PyQT and PyGTK are similar to their underlying interfaces
>   o  Tkinter comes with the default Python install, and provides the
> Tk widget set
>   o  With IronPython, you can access the regular Microsoft .NET GUIs
>   o  PythonCard and EasyGUI are supposed to be pretty easy GUIs to use
>   o  Dabo is a full-on database/GUI/platform set to easy cross-
> platform GUI and database programming.
> 
> The links to all those can be found at link [5]. Don't be afraid if
> the choices are overwhelming. You have choices.  I highly recommend
> that you learn Python first, then examine the different GUI systems,
> keeping in mind any requirements you may have and your previous
> experience.
> 
> [1] http://www.eclipse.org/
> [2] http://pydev.sourceforge.net/
> [3] http://wingware.com/
> [4] http://www.activestate.com/products/komodo_ide/
> [5] http://wiki.python.org/moin/GuiProgramming
> 
If you are looking for a good IDE and you are in the Windows World,
have a look at PyScripter.  It is in development and the developer
gives an excellent response to any queries or potential bugs.

Colin W.



From mail at timgolden.me.uk  Tue Sep 11 08:58:26 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Tue, 11 Sep 2007 13:58:26 +0100
Subject: shared memory pointer
In-Reply-To: <1189437684.476993.130390@g4g2000hsf.googlegroups.com>
References: <1189436265.841415.234050@w3g2000hsg.googlegroups.com>	<mailman.325.1189437043.2658.python-list@python.org>
	<1189437684.476993.130390@g4g2000hsf.googlegroups.com>
Message-ID: <46E690F2.9060306@timgolden.me.uk>

Tim wrote:
> I saw the mmap function in the shared memory example. I had some
> concern with my large memory size being written to the disk drive. I
> though it might slow down my application. The reason I am writting
> this new code is because the existing method using a file. I thought
> shared memory would be much faster.
> 
> I have tried using the memcpy and addresses, casting, etc. Is there a
> way to use memcpy with the pData returned by MapViewOfFile()?

Tim, let's try to back up on this a moment. As I understand, you're
running under Windows and you want to use shared memory, presumably
between two processes. You know about the CreateFileMapping/MapViewOfFile
API, possibly from this example on MSDN [1] and you want to use that
technique in Windows *without* an explicit file backing.

Am I right so far?

I suggested the mmap module, and you seemed to pick up on it
and be trying to use both your ctypes solution *and* the mmap
module as two halves of the same mechanism. Maybe I misunderstood,
but that's what it looked like.

Then you asked a question about getting hold of a Python object's
memory address to be able to pass it into your ctypes solution.
(Which makes sense, given the nature of that solution).

What you seem to have missed is that your ctypes code is doing
*exactly* what the mmapmodule.c code (which is the implementation
of the mmap module) is doing for you behind the scenes.

Here's your code (very slightly reformatted):

<code>
szName = c_char_p(name)
hMapObject = windll.kernel32.CreateFileMappingA(
   INVALID_HANDLE_VALUE,
   None,
   PAGE_READONLY,
   0,
   TABLE_SHMEMSIZE,
   szName
)
if (hMapObject == 0):
   print "OpenKey: Could not open name file mapping object"
   raise WinError()

self.pData = windll.kernel32.MapViewOfFile(
   hMapObject,
   FILE_MAP_ALL_ACCESS,
   0,
   0,
   TABLE_SHMEMSIZE
)

</code>

and here's the code from mmapmodule.c (also reformatted
and snipped about):

<code>
m_obj->map_handle = CreateFileMapping(
   m_obj->file_handle,
   NULL,
   flProtect,
   size_hi,
   size_lo,
   m_obj->tagname
);
if (m_obj->map_handle != NULL) {
   m_obj->data = (char *) MapViewOfFile(
     m_obj->map_handle,
     dwDesiredAccess,
     0,
     0,
     0
);

</code>

I hope you can see that they're basically doing the same
thing. (given the appropriate parameters). The only
clear difference is that the final param to MapViewOfFile
is 0 in the Python code, which the MSDN docs[2] indicate
"If this parameter is 0 (zero), the mapping extends
from the specified offset to the end of the file mapping."
It's not clear from that how it applies to a non-file-backed
FileMapping, but I *assume* that the Python devs have tested
that out.

In short, to have two Python processes talk via shared
memory (not linking to a specific file) the following
works for me:

<code-a>
import mmap

#
# The 0 special file value can be -1 in Python 2.5
#
shmem = mmap.mmap (0, 1000, "TJG", mmap.ACCESS_WRITE)
shmem.write ("blah blah")
</code-a>

<code-b>
import mmap

shmem = mmap.mmap (0, 1000, "TJG", mmap.ACCESS_WRITE)
print shmem.read (9)
</code>

Obviously, I've used dummy codes and values, but since
the .write and .read (and the other helper methods)
use strings, you can always pickle or marshal arbitrary
Python data to move it around.

I hope all that's helpful; if nothing else, it's given
me some exercise in reading the code of the stdlib, which
can't be bad!

TJG

[1] http://msdn2.microsoft.com/en-us/library/aa366551.aspx
[2] http://msdn2.microsoft.com/en-us/library/aa366761.aspx


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Sep 13 14:54:29 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 13 Sep 2007 20:54:29 +0200
Subject: newbie: self.member syntax seems /really/ annoying
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189604018.520338.162520@57g2000hsv.googlegroups.com>
	<mailman.486.1189693844.2658.python-list@python.org>
	<13eim00ha4lf356@corp.supernews.com>
	<Xns99AA68B097778OKB@199.45.49.11>
Message-ID: <5ktfb5F5ctrvU1@mid.individual.net>

OKB (not okblacke) wrote:

What kind of name is this?

> No, but the point being made is that it would be better IN
> THIS CASE.

It wouldn't. IMHO, rewriting the code to two or three lines would be
better. No need to scream, BTW.

Regards,


Bj?rn

-- 
BOFH excuse #447:

According to Microsoft, it's by design



From bignose+hates-spam at benfinney.id.au  Mon Sep 17 22:07:39 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 18 Sep 2007 12:07:39 +1000
Subject: Why 'class spam(object)' instead of class spam(Object)' ?
References: <mailman.205.1189146609.2658.python-list@python.org>
	<46e10916$0$16518$4c368faf@roadrunner.com>
	<fbs1id$acq$1@sea.gmane.org>
	<mailman.688.1190077067.2658.python-list@python.org>
Message-ID: <87d4wg20b8.fsf@benfinney.id.au>

[Colin, you posted your message to both of 'comp.lang.python' and
'gmane.comp.python.general'. The latter is merely a view on the
former, and your message appears in exactly the same places if you
post only to 'comp.lang.python'.]

"Colin J. Williams" <cjw at sympatico.ca> writes:

> > Carl Banks wrote:
> >> The reason why "object" is lower case is because built-in types
> >> are spelled in lower-case.

> Does the user care whether an object is implemented in C?

Probably not. But they probably do care that the type is built-in.

-- 
 \      "The trouble with the rat race is that even if you win, you're |
  `\                    still a rat."  -- Jane Wagner, via Lily Tomlin |
_o__)                                                                  |
Ben Finney


From dstanek at dstanek.com  Thu Sep  6 05:00:12 2007
From: dstanek at dstanek.com (David Stanek)
Date: Thu, 6 Sep 2007 05:00:12 -0400
Subject: Autogenerate functions (array of lambdas)
In-Reply-To: <1189067829.685339.50550@y42g2000hsy.googlegroups.com>
References: <1189067829.685339.50550@y42g2000hsy.googlegroups.com>
Message-ID: <de32cc030709060200y6242b198s9c6a2e07e94433d5@mail.gmail.com>

On 9/6/07, Chris Johnson <effigies at gmail.com> wrote:
>
> What I want to do is build an array of lambda functions, like so:
>
> a = [lambda: i for i in range(10)]
>
> (This is just a demonstrative dummy array. I don't need better ways to
> achieve the above functionality.)
>
> print [f() for f in a]
>
> results in: [9, 9, 9, 9, 9, 9, 9, 9, 9, 9]
> rather than the hoped for: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>
> Clearly, lambda is returning the object i, which is left at the last
> value of range(10). The following is my solution.
>
> t = lambda i: lambda: i
> a = [t(i) for i in range(10)]
>
> or the somewhat more terse:
>
> a = [(lambda i: lambda: i)(i) for i in range(10)]
>
> This gives the behavior which, intuitively, I expected from the
> original syntax. So my questions are:
> 1) Does this make sense as what should be done here? That is, would
> this be the behavior you'd want more often than not? As I said,
> intuitively, I would think the lambda would treat the iterator
> variable as a constant in this context.
> 2) Is there a better or preferred method than the one I've found?


A more explicit example of your solution would be:
    >>> def gen(i):
    ...     return lambda: i # bind to the i passed in
    ...
    >>> l = [gen(i) for i in range(10)]
    >>> [f() for f in l]
    [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

Your initial lambda: i creates a function that binds to i in the current
scope. When you wrapped that in another lambda you were creating a new scope
with a new value of i and returning a function bound to that value for i.

Take a look at closures:
  http://www.ibm.com/developerworks/linux/library/l-prog2.html#h1
  http://ivan.truemesh.com/archives/000392.html


David
--
http://www.traceback.org
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From alexandre.badez at gmail.com  Thu Sep 27 11:46:55 2007
From: alexandre.badez at gmail.com (Alexandre Badez)
Date: Thu, 27 Sep 2007 15:46:55 -0000
Subject: Launching command on windows
In-Reply-To: <1190902803.222738.52050@w3g2000hsg.googlegroups.com>
References: <1190899078.141370.116190@57g2000hsv.googlegroups.com>
	<1190902803.222738.52050@w3g2000hsg.googlegroups.com>
Message-ID: <1190908015.102664.323390@w3g2000hsg.googlegroups.com>

On Sep 27, 4:20 pm, kyoso... at gmail.com wrote:
>
> I got it to work using subprocess.Popen
>
> Not sure why it doesn't work with os.system though.
>
> Mike

Thanks Mike and Mauro,

Mauro, your solution do not seems to work (or I made a mistake..)
Mike your solution work great, thanks.
But, I steel think it's a bug (python or window ??).
I will try to take a look about it, when I have time.

Alex



From guruyaya at gmail.com  Sun Sep 16 06:06:45 2007
From: guruyaya at gmail.com (guruyaya)
Date: Sun, 16 Sep 2007 03:06:45 -0700
Subject: Half off topic, getting python development lib from mingw
Message-ID: <1189937205.093048.238900@k79g2000hse.googlegroups.com>

Hi guys. I'm using python 2.3 on XP. At the moment, I might add, I
cannot change any of these: I cannot move back to linux, and I cannot
use a higher version of python.
Trying to install sip 4.7, using gcc version 3.4.2 (mingw-special),
created this error:

siplib.o:siplib.c:(.text+0x17): undefined reference to
`_imp__PyType_Type'

that led me to understand, that I just didn't install the mingw port
of python development libs. That's cool, but I just can't find it
anywhere. Anyone has a link?



From gherzig at fmed.uba.ar  Wed Sep  5 09:38:50 2007
From: gherzig at fmed.uba.ar (Gerardo Herzig)
Date: Wed, 05 Sep 2007 10:38:50 -0300
Subject: Help me understand this script
In-Reply-To: <OF516F31FE.31225D80-ON8525734D.00405FE1-8525734D.00408DB0@notes.uss.com>
References: <OF516F31FE.31225D80-ON8525734D.00405FE1-8525734D.00408DB0@notes.uss.com>
Message-ID: <46DEB16A.5060200@fmed.uba.ar>

Ryan J Nauman wrote:

>Can someone help me understand this script please?
>I understand everything except for the anagram function.  Could you break 
>it down into more than 1 line of code for me or explain it? (I understand 
>WHAT it does but HOW?) Thanks.
>
>Script >>
>
>###
># SCRABBLE.PY
>#
># purpose: 
>#       find usable "bingos" based on your rack
>#
># usage:
>#       python scrabble.py eilsnsy
>#
># output:
># Straight anagrams: 
>#  linseys
>#  lysines
># Possible other words: 
># + B
>#   sensibly
>#+ K
>#   skylines
>#+ V
>#   sylvines
>###
># Scrabble is a registered trademark of J. W. Spear & Son PLC and 
># Hasbro Inc. Any and all uses of the word "Scrabble" in this code
># refers to this trademark.
>#
># This code is not affiliated with any company.
>###
>
>import sys
>
>WORDS = [ i.rstrip ().lower() for i in file ('c:\python25\TWL06.txt') ]
># you can download the current TWL and/or SOWPODS dictionaries from 
># http://67.19.18.90/twl.zip and http://67.19.18.90/sowpods.zip . 
># Update the file name above as appropriate if you want to use a "proper"
># Scrabble dictionary.
>
>
>
>def alphabetise(word):
>    x = [i for i in word]
>    x.sort()
> 
>    return "".join(x)
>
>def anagram(word):
>    wordLength = len(word)
>    sortedWord = alphabetise(word.lower())
>    return [i for i in WORDS if len(i) == wordLength and alphabetise(i) == 
>sortedWord]
>
>for word in sys.argv[1:]:
>    print "Straight anagrams: "
>    for i in anagram(word):
>        print "  " + i
>    print "Possible other words: "
>    for i in "ABCDEFGHIJKLMNOPQRSTUVWXYZ":
>        a = anagram(i + word)
>        if a:
>            print "+", i
>            for h in a:
>                print "  ", h
>
><< End script
>  
>
I guess the difficult part remains in the last line. (Untested code bellow)
[code]

def anagram(word):
    resultValue = []
    wordLength = len(word)
    sortedWord = alphabetise(word.lower()) #not much to change until here
    for WORD in WORDS:
	if wordLength == len(WORD) and alphabetise(WORD) == sortedWord:
		resultValue.append(WORD)

    return resultValue

[/code]

Cheers.
Gerardo


From bbxx789_05ss at yahoo.com  Mon Sep 17 11:54:06 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Mon, 17 Sep 2007 08:54:06 -0700
Subject: curses: x, y positioning
In-Reply-To: <1190044252.770768.241100@w3g2000hsg.googlegroups.com>
References: <1189891633.622313.81850@r29g2000hsg.googlegroups.com>
	<m9qre35si8tujadfs6d0ukk4f9rhdgvuao@4ax.com>
	<1190035292.415363.22320@50g2000hsm.googlegroups.com>
	<1190044252.770768.241100@w3g2000hsg.googlegroups.com>
Message-ID: <1190044446.102835.323950@n39g2000hsh.googlegroups.com>

On Sep 17, 9:50 am, 7stud <bbxx789_0... at yahoo.com> wrote:
> Ok.  This works:
>
> import curses
> import curses.wrapper

Oops.  That second import statement isn't necessary.



From mridula.ccpl at gmail.com  Fri Sep 28 07:41:35 2007
From: mridula.ccpl at gmail.com (Mridula Ramesh)
Date: Fri, 28 Sep 2007 17:11:35 +0530
Subject: Bug: spurious indentation error
Message-ID: <33dffc910709280441p14f78175n8549bdb315416328@mail.gmail.com>

hi.

is this the right place to report a bug?

i had written this by mistake:
   filemenu = Menu(menu) , bg="White")

instead of
  filemenu = Menu(menu, bg="Pink")

and the compiler kept giving me an indentation error in a line much further
down which was perfectly okay.

i am using python 2.5.1 with IDLE 1.2.1 on a windows XP machine.
anyone else struggling with the same thing, beware! :)

-mridula.
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From daniel.j.larsson at gmail.com  Tue Sep  4 17:52:37 2007
From: daniel.j.larsson at gmail.com (Daniel Larsson)
Date: Tue, 4 Sep 2007 23:52:37 +0200
Subject: doctest and decorators
In-Reply-To: <200709042316.08263.python@cx.hu>
References: <2bfa72fa0709041329i14b5b547i2eb85250f7547da@mail.gmail.com>
	<200709042236.37712.python@cx.hu>
	<2bfa72fa0709041401g63e5f6aem55bcabe9e00134b@mail.gmail.com>
	<200709042316.08263.python@cx.hu>
Message-ID: <2bfa72fa0709041452o72d9a98fp939852d061a2cda3@mail.gmail.com>

On 9/4/07, Ferenczi Viktor <python at cx.hu> wrote:
>
> > @functools.wraps
>
> Correctly:
>
> @functools.wraps(f)
>
> Pass the function to be wrapped by the decorator to the wraps function.


Ooops, right. That doesn't change the fact that decorated functions get
hidden from doctest though.
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From jgardner.jonathangardner.net at gmail.com  Thu Sep  6 16:52:34 2007
From: jgardner.jonathangardner.net at gmail.com (Jonathan Gardner)
Date: Thu, 06 Sep 2007 20:52:34 -0000
Subject: parsing long `To' and 'Cc' from email
In-Reply-To: <mailman.181.1189108639.2658.python-list@python.org>
References: <mailman.181.1189108639.2658.python-list@python.org>
Message-ID: <1189111954.287203.123440@o80g2000hse.googlegroups.com>

On Sep 6, 1:25 pm, Gerardo Herzig <gher... at fmed.uba.ar> wrote:
> the email.* package dont seems to parse that kind of headers
> `correctly'. What i want is to get a list with all the email address in
> the `To' header.
>
> Someone know if there is a more sofisticated parser for doing this?
>

If you're not interested in parsing the entire email message, you may
just want to run a regex on the message itself, looking for the "to"
header.

Here's a good start:

r"^to:\s*(.*)$"

You'll want to use the multi-line and case-insensitive options when
you use it.






From jweida at gmail.com  Sat Sep  1 22:48:57 2007
From: jweida at gmail.com (Jerry)
Date: Sun, 02 Sep 2007 02:48:57 -0000
Subject: Automation and scheduling of FrontPage publishing using Python
In-Reply-To: <1188698223.393723.151140@d55g2000hsg.googlegroups.com>
References: <1188517723.279932.299400@x40g2000prg.googlegroups.com>
	<fbamnh$r7q$7@lust.ihug.co.nz>
	<mailman.250.1188620292.28954.python-list@python.org>
	<fbb1lr$evf$5@lust.ihug.co.nz>
	<mailman.255.1188630271.28954.python-list@python.org>
	<fbb3kv$jk5$1@lust.ihug.co.nz>
	<1188698223.393723.151140@d55g2000hsg.googlegroups.com>
Message-ID: <1188701337.798785.188420@19g2000hsx.googlegroups.com>

andrew,

I would try looking into Windows automation with Python.
http://www.google.com/search?q=windows+automation+python should get
you started.  The winGuiAuto package may help you out as it is like
have a human click and move throughout the interface.  The only
downside is that there is no recorder to help you build the script, so
I would try to do as much in VBA as you can (does FrontPage even
support VBA?) and then just write your python script to get through
the program enough to execute the macro.



From bj_666 at gmx.net  Mon Sep 24 08:25:35 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 24 Sep 2007 12:25:35 GMT
Subject: rules from an xml file
References: <1190633685.275142.264540@r29g2000hsg.googlegroups.com>
	<5lpm4dF93534U1@mid.uni-berlin.de>
Message-ID: <5lpolvF95s07U4@mid.uni-berlin.de>

On Mon, 24 Sep 2007 13:42:05 +0200, Diez B. Roggisch wrote:

> jonny wrote:
> 
>> <rules>
>>    <rule01>
>>       <if>
>> <or>
>> <lessthan par_1="glicemyAtMorning" par_2="80"/>
>> <lessthan par_1="glicemyAtNight" par_2="80"/>
>> <and>
>> <greaterthan par_1="glicemyAtMorning" par_2="0"/>
>> <or>
>> <equalto par_1="urine" par_2="0"/>
>> <equalto par_1="urine" par_2="+/-"/>
>> <equalto par_1="urine" par_2="+"/>
>> </or>
>> </and>
>> </or>
>> </if>
>>         <then>
>>            <sendmessage>Something is wrong!</sendmessage>
>>         </then>
>>    </rule01>
>>    <rule02> ...  </rule02>
>>    <rule03> ...   </rule03>
>> </rules>
>> [?]
> [?]
> Just a note: the use of "par_X" as attributes is unfortunate, to say the
> least. It doesn't allow for easy argument swapping, can cause troubles
> because you delete one attribute and miss renaming the others, and in
> general it's not good design to have arbitrary numbers of parameters.

Quite the same is true for numbers in tag names.  If you (the OP) need to
number the rules better use an attribute for the numbers.

Ciao,
	Marc 'BlackJack' Rintsch


From jstroud at mbi.ucla.edu  Mon Sep 24 15:49:55 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 24 Sep 2007 12:49:55 -0700
Subject: Nested For and While Statements
In-Reply-To: <1190662087.403000.16290@g4g2000hsf.googlegroups.com>
References: <1190662087.403000.16290@g4g2000hsf.googlegroups.com>
Message-ID: <fd94av$fj8$1@daisy.noc.ucla.edu>

koutoo at hotmail.com wrote:
> I start my code with some constants then a while statement.  But I
> have some For statements towards the end within the While statement
> where I start getting some errors.  I'm hoping I won't have to post my
> code, but it looks something like this:
> 
> Import os, string
> 
> while this:
> 
>      All Code indented like it should
> 
> 
>      Last line in While.
> 
>            For i in range(1)
>                 class = []
>                 class2 = []
>                 For i in range(2)
>                      Do this
>                      And this
>                      And that.
> 
>                      Next Line hits snag here?  Where should this line
> be?
> 

Your for loops both use the same counting index.


From grante at visi.com  Tue Sep 18 12:00:11 2007
From: grante at visi.com (Grant Edwards)
Date: Tue, 18 Sep 2007 16:00:11 -0000
Subject: How can I know how much to read from a subprocess
References: <1190070896.332844.23080@22g2000hsm.googlegroups.com>
	<1190072376.600475.254260@y42g2000hsy.googlegroups.com>
	<slrnfevb8h.299.hat@se-162.se.wtb.tue.nl>
	<1190130585.255648.312730@q3g2000prf.googlegroups.com>
Message-ID: <13evtgbv6aqtf0@corp.supernews.com>

On 2007-09-18, spam.noam at gmail.com <spam.noam at gmail.com> wrote:

> But even if it's fast enough, how do you know how many times you
> should call read(1)? If you do it too much, you'll be blocked until
> more output is available.

You don't know.  That's why you use non-blocking mode.

-- 
Grant Edwards                   grante             Yow! BELA LUGOSI is my
                                  at               co-pilot ...
                               visi.com            


From paddy3118 at googlemail.com  Fri Sep 14 02:37:49 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Fri, 14 Sep 2007 06:37:49 -0000
Subject: Extended slicing and Ellipsis - where are they used?
In-Reply-To: <fcclfe$ur6$1@daisy.noc.ucla.edu>
References: <1189699345.436400.233460@g4g2000hsf.googlegroups.com>
	<fcclfe$ur6$1@daisy.noc.ucla.edu>
Message-ID: <1189751869.773724.165040@w3g2000hsg.googlegroups.com>

On Sep 14, 1:50 am, James Stroud <jstr... at mbi.ucla.edu> wrote:
> Rodney Maxwell wrote:
> > The following are apparently legal Python syntactically:
> >    L[1:3, 8:10]
> >    L[1, ..., 5:-2]
>
> > But they don't seem to work on lists:
> >>>> l = [0,1,2,3]
> >>>> l[0:2,3]
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in <module>
> > TypeError: list indices must be integers
> >>>> l[...]
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in <module>
> > TypeError: list indices must be integers
>
> > So where is this extended slicing used?
>
> AFAICT this syntax is not used in the standard library. However, the
> mega-beauty of it is that you can make use of it in your own classes:
>
> py> class Bob(list):
> ...   def __getitem__(self, i):
> ...     try:
> ...       return [list.__getitem__(self, j) for j in i]
> ...     except TypeError:
> ...       return list.__getitem__(self, i)
> ...
> py> b = Bob(xrange(15, 30))
> py> b[3, 5, 7, 13]
> [18, 20, 22, 28]
>
> James

And the ellipses ... ?

- Paddy.



From gandalf at designaproduct.biz  Thu Sep 13 07:29:06 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Thu, 13 Sep 2007 13:29:06 +0200
Subject: wx.ToplevelWindow.SetIcon: Native MS Windows error dialog pops up
	in wxPython app, no exception raised, no stack trace
Message-ID: <46E91F02.7080806@designaproduct.biz>


  Hello,

I wrote a small program that works uses wxPython. The same application 
works on Linux and Windows. When I start it from MS Windows, I see this 
error message appearing each time I open a window:

---------------------------
Warehouseclient Error
---------------------------
Can't load image from file '': file does not exist.
---------------------------
OK  
---------------------------


The message box itself is a native MS Windows dialog. Otherwise the 
program works fine, just here is this annoying message. There is no 
exception raised in the Python program. Nothing printed on console. I 
figured out that this happens only when I set the icon of the window 
using this code:

self.SetIcon(icon)

However, the error dialog is not displayed right after the SetIcon call 
and no exception is raised. The dialog is displayed after __init__ has 
been called, and probably before EVT_SHOW gets called. Documentation of 
SetIcon 
(http://wxwidgets.org/manuals/stable/wx_wxtoplevelwindow.html#wxtoplevelwindowseticon) 
says that it is safe to delete the icon after calling this function. Now 
here are the wreid things:

1. The icon is displayed correctly in the left top corner, so where is 
the error?
2. The error message complains about a file. What has 
wx.ToplevelFrame.SetIcon do with files?

I'm using: Windows XP Professional, Python 2.5, wxPython 2.8

Thanks,

   Laszlo



From namesagame-usenet at yahoo.com  Thu Sep 13 07:03:17 2007
From: namesagame-usenet at yahoo.com (gamename)
Date: Thu, 13 Sep 2007 04:03:17 -0700
Subject: Python+Expect+Win32 = Not Possible?
In-Reply-To: <1189672955.321701.164050@57g2000hsv.googlegroups.com>
References: <1189657637.539038.317280@k79g2000hse.googlegroups.com>
	<1189672955.321701.164050@57g2000hsv.googlegroups.com>
Message-ID: <1189681397.349994.126130@57g2000hsv.googlegroups.com>

On Sep 13, 1:42 am, half.ital... at gmail.com wrote:
> On Sep 12, 9:27 pm, gamename <namesagame-use... at yahoo.com> wrote:
>
> > Hi,
>
> > Is it still the case there is no practical Expect-like module for
> > win32? I know that cygwin can support pexpect, but that isn't an
> > option here --- I have to use a native win32 Python version.
>
> > Are there alternatives, or is it simply not an option to replicate
> > Expect on win32 with python?
>
> > All I'm trying to do is start a couple processes, wait for each to say
> > "done" on stdout and then quit (or timeout if something went wrong).
>
> > TIA,
> > -T
>
> I had planned on using telnet to do the same thing on windows.  I
> don't think I ever proved it, but I'm pretty sure it will work.

Thanks, Sean.  The problem is that telnet is generally disabled on
most hosts nowadays.

>
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52228
>
> ~Sean




From furkankuru at gmail.com  Sat Sep 22 06:28:40 2007
From: furkankuru at gmail.com (Furkan Kuru)
Date: Sat, 22 Sep 2007 13:28:40 +0300
Subject: calling the function of one class from another class
In-Reply-To: <33dffc910709220024l74b14267v93564df10f5af9a6@mail.gmail.com>
References: <33dffc910709220024l74b14267v93564df10f5af9a6@mail.gmail.com>
Message-ID: <3a4a8f930709220328h1ae25d10jd772e265cd298bcd@mail.gmail.com>

On 9/22/07, Mridula Ramesh <mridula.ccpl at gmail.com> wrote:
>
> hi.
>
> i currently have code structured like this:
>
> classA():
> >     def __init__():
> >      ..............
> >      ..............
> >
> >     def fnc1():
> >     ....................
> >     ....................
> >
> >
> > classB():
> >    def __init__():
> >     ........................
> >     ........................
> >     classA.fnc1()    #this is where i get an error
> >
>
> TypeError: unbound method fnc1() must be called with classA instance as
> first argument (got nothing instead)
>
> when i do  fnc1(classA) i get:
>
> NameError: global name 'fnc1' is not defined
>
> am i violating some programming rule by trying to call fnc1 in classB? i
> am only now learning OO alongside python, so i'm not sure! also, can someone
> please tell me where to go for more articles on the classes and functions
> and calling them from other places?
>
> thanks a lot!
>
> mridula.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>

you should create an instance of ClassA:

a = ClassA()
a.fnc1()

or if you want a static function you should declare the method as static

classA():
    def __init__():
     ..............
     ..............
    @staticmethod
    def fnc1():
    ....................
    ....................
-- 
Furkan Kuru
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From bignose+hates-spam at benfinney.id.au  Wed Sep 19 23:41:46 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 20 Sep 2007 13:41:46 +1000
Subject: Mixin classes and single/multiple inheritance
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au>
	<46f0fba0$0$29605$426a34cc@news.free.fr>
	<1190199134.791808.267110@22g2000hsm.googlegroups.com>
	<mailman.778.1190225664.2658.python-list@python.org>
	<1190256493.827576.139470@r29g2000hsg.googlegroups.com>
	<877immvye0.fsf_-_@benfinney.id.au>
	<1190257864.945639.199230@k79g2000hse.googlegroups.com>
Message-ID: <87tzpquhol.fsf@benfinney.id.au>

Michele Simionato <michele.simionato at gmail.com> writes:

> Ben Finney wrote:
> > What do you see as an appropriate use of mixin classes, and what
> > an abuse?
> 
> An example of fine usage of mixin is Tkinter; an example of bad
> usage if Zope 2.

Which parts of those two very large code sets do I need to look at to
see the examples you have in mind? I was hoping you could demonstrate
with short code examples.

-- 
 \          "One thing vampire children have to be taught early on is, |
  `\                   don't run with a wooden stake."  -- Jack Handey |
_o__)                                                                  |
Ben Finney


From bronger at physik.rwth-aachen.de  Thu Sep  6 02:02:33 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Thu, 06 Sep 2007 08:02:33 +0200
Subject: Wanted: safe codec for filenames
References: <87sl5tcrw9.fsf@wilson.homeunix.com>
	<87ps0w92ki.fsf@wilson.homeunix.com>
	<mailman.132.1189046151.2658.python-list@python.org>
Message-ID: <871wdcz5za.fsf@wilson.homeunix.com>

Hall?chen!

Gabriel Genellina writes:

> En Wed, 05 Sep 2007 19:20:45 -0300, Torsten Bronger
> <bronger at physik.rwth-aachen.de> escribi?:
>
>> Torsten Bronger writes:
>>
>>> I'd like to map general unicode strings to safe filename.  I
>>> tried punycode but it is case-sensitive, which Windows is not.
>>> [...]
>>
>> Okay, the following works fine for me:
>
> Nice codec. Altough if one is looking for really portable file
> names, there are additional rules, collected here
> http://www.boost.org/libs/filesystem/doc/portability_guide.htm
> Hard to comply with all the character set rules *and* keep all name
> lengths below the limits.

Yes, and therefore, a *very* careful encoding was not an option.
For my own application, I need long filenames for example.  So I
used a Wikipedia table to find a sensible compromise.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From deets at nospam.web.de  Thu Sep  6 03:21:08 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 06 Sep 2007 09:21:08 +0200
Subject: Using wild character
In-Reply-To: <1189054805.447871.213150@y42g2000hsy.googlegroups.com>
References: <1189054805.447871.213150@y42g2000hsy.googlegroups.com>
Message-ID: <5k9o3gF2n8u0U1@mid.uni-berlin.de>

Sreeraj schrieb:
> hi,
> 
>  I am a beginner in Python. I wish to know how can i filter a list of
> strings using wild characters.ie
> Lets say i have list countries =
> ["india","africa","atlanta","artica","nigeria"]. I need only the list
> of string starting with 'a'.

While the startswith-method others pointed out works, I wanted to direct 
you attention to the module fnmatch.

http://www.python.org/doc/current/lib/module-fnmatch.html

It will work with real wildcards.

Diez


From fakeaddress at nowhere.org  Sat Sep 22 11:13:22 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Sat, 22 Sep 2007 15:13:22 GMT
Subject: Getting rid of bitwise operators in Python 3?
In-Reply-To: <46f49740$0$32514$4c368faf@roadrunner.com>
References: <46f49740$0$32514$4c368faf@roadrunner.com>
Message-ID: <miaJi.28220$eY.3184@newssvr13.news.prodigy.net>

Carl Banks wrote:
> Not many people are bit-fiddling these days.  One of the main uses of bit 
> fields is flags, but that's not often done in Python because of keyword 
> arguments and dicts, which are lot more versatile.  Another major use, 
> talking to hardware, is not something oft done in Python either.
[...]
> Of course I'm not suggesting to get rid of bitwise operations altogether; 
> just make them builtin functions: "x & 1" becomes "bitwise_and(x,1)" and 
> so on.

Based on one informal survey (of my recollection), many
Pythoneers bit-twiddle, and all of them also know C. For
this population, Python's adoption of C's bitwise operators
helps avoid user-out-of-memory errors. Python even kept C's
counter-intuitive low precedence for shifts.

One surprising result was that more of the Python
programmers surveyed use bitwise operators than are aware
of the exponentiation operator, which C does not offer.

Possibly the study used a bias sample.


-- 
--Bryan


From yosuke at ccwf.cc.utexas.edu  Mon Sep 17 18:10:30 2007
From: yosuke at ccwf.cc.utexas.edu (yosuke at ccwf.cc.utexas.edu)
Date: Mon, 17 Sep 2007 22:10:30 +0000 (UTC)
Subject: class that keeps track of instances
Message-ID: <fcmu0m$61c$1@geraldo.cc.utexas.edu>

Hello all,

I'd like some advices from more experienced python users.  I want to
have a class in my python application that does not allow multiple
instance with same "name".  

I want to have a class (call it kls) that behave at least following way:

1) New instance has to have a property called 'name'
2) When instance is attemped to created, e.g., x=kls(name='myname'), and
there already exists an instance with obj.name =='myname', that
pre-existing instance is returned, instead of making new one.  
3) A class property 'all' for class gives me a list of all the
instances.  So kls.all lets me iterates through all instances.
4) When all the hard-link to an instance is deleted, the instance should
be deleted, just like an instance from any regular class does.

My question is if i can find metaclass or something that allows me to
create such class easily.  I tried to search such thing on internet, but
I even don't know how to call this kind of thing.  It is in a sense like
singleton, but less restrictive.

Assuming that I have to write it on my own, what should I do?  I tried
to implement it using weakref.WeakValueDictionary and metaclass, but
instance doesn't disappear when I think it should disappear.  I am also
wondering if it is easier to keeping {name:id(obj)} would be a better
solution.

Any other suggestions are very much appreciated as well.



-- 
yosuke kimura
Center for Energy and Environmental Resources
The Univ. of Texas at Austin, USA


From stephane.larouche at polymtl.ca  Mon Sep 24 13:56:04 2007
From: stephane.larouche at polymtl.ca (=?utf-8?b?U3TDqXBoYW5l?= Larouche)
Date: Mon, 24 Sep 2007 17:56:04 +0000 (UTC)
Subject: Can a base class know if a method has been overridden?
References: <1190647436.423328.217670@w3g2000hsg.googlegroups.com>
	<46f7d897$0$25150$426a74cc@news.free.fr>
	<1190648887.051630.168520@r29g2000hsg.googlegroups.com>
	<46f7e8df$0$21052$426a74cc@news.free.fr>
Message-ID: <loom.20070924T175232-466@post.gmane.org>

What about something like:

class A(object):
	def my_method(self):
		print "A.my_method"
	def call_my_method(self):
		if type(self).my_method == A.my_method:
			print "Calling base class method."
		else:
			print "Calling derived class method."
		self.my_method()
		
class B(A):
	pass

class C(A):
	def my_method(self):
		print "C.my_method"

a = A()
b = B()
c = C()

a.call_my_method()
b.call_my_method()
c.call_my_method()


St?phane





From effigies at gmail.com  Thu Sep  6 11:46:42 2007
From: effigies at gmail.com (Chris Johnson)
Date: Thu, 06 Sep 2007 15:46:42 -0000
Subject: Autogenerate functions (array of lambdas)
In-Reply-To: <7xr6lc6v49.fsf@ruckus.brouhaha.com>
References: <1189067829.685339.50550@y42g2000hsy.googlegroups.com>
	<7xr6lc6v49.fsf@ruckus.brouhaha.com>
Message-ID: <1189093602.253138.147650@50g2000hsm.googlegroups.com>

On Sep 6, 3:44 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> Chris Johnson <effig... at gmail.com> writes:
> > a = [lambda: i for i in range(10)]
> > print [f() for f in a]
> > results in: [9, 9, 9, 9, 9, 9, 9, 9, 9, 9]
> > rather than the hoped for: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>
> The usual idiom is
>
>   a = [lambda i=i: i for i in range(10)]
>
> That way i is not a free variable in the lambda.

Thanks. I figured there had to be a better way than what I was doing.



From jgardner.jonathangardner.net at gmail.com  Thu Sep  6 19:08:35 2007
From: jgardner.jonathangardner.net at gmail.com (Jonathan Gardner)
Date: Thu, 06 Sep 2007 23:08:35 -0000
Subject: SSL Issue
In-Reply-To: <xqxbqcge45o.fsf@cola3.ca.boeing.com>
References: <mailman.114.1189025717.2658.python-list@python.org>
	<xqxbqcge45o.fsf@cola3.ca.boeing.com>
Message-ID: <1189120115.915370.307810@57g2000hsv.googlegroups.com>

On Sep 5, 10:47 pm, Harry George <harry.g.geo... at boeing.com> wrote:
> Jurian Botha <jur... at oco.co.za> writes:
> > Sorry if this is a real dumb question, but I'm totally stumped.
>
> > I'm trying to connect to a https url in order to do some xml-rpc method
> > calls, but I'm getting the following error:
>
> > Error Type: sslerror
> > Error Value: (6, 'TLS/SSL connection has been closed')
>
> > What could be causing this error, any clues would be greatly appreciated.
>
> > Thanks
> > --
> > View this message in context:http://www.nabble.com/SSL-Issue-tf4388062.html#a12510772
> > Sent from the Python - python-list mailing list archive at Nabble.com.
>
> I don't have a complete story, but here are some hints:
>
> 1. The message is from:http://www.openssl.org/docs/ssl/SSL_get_error.html
> (see "ZERO RETURN")
> probably as filtered by
> PyOpenSSL, which has its own issues:http://mail.python.org/pipermail/python-dev/2007-August/074322.html
>
> 2. Chances are that your certificates are out of whack, or you are
> misusing the SSL context parameters, or are not telling the HTTP
> Connection object about the SSL Connection properly.
>
> 3. Debugging at the python layer is easier (put print statements in
> M2Crypto's SSL/Context and SSL/Connection) but if necessary, dive into
> openssl:
> http://www.mail-archive.com/openssl-us... at openssl.org/msg49287.html
>
> 4. You can check for the "hello" handshake using WireShark.
>
> 5. I haven't found a tutorial for full Python client/server over HTTPS
> with verification of both client and server certificates.  If that is
> where you are going, let me know what works.
>


Try the "openssl s_client <host>:<port>" command to get some handy
info on what is happening. It's kind of like telnet but for SSL. This
will help isolate SSL issues from the Python layer.



From bh at izb.knu.ac.kr  Sun Sep 30 09:35:06 2007
From: bh at izb.knu.ac.kr (Byung-Hee HWANG)
Date: Sun, 30 Sep 2007 22:35:06 +0900
Subject: Can you please give me some advice?
In-Reply-To: <46ff7b44$0$4798$4fafbaef@reader4.news.tin.it>
References: <mailman.1300.1191147737.2658.python-list@python.org>
	<46ff7b44$0$4798$4fafbaef@reader4.news.tin.it>
Message-ID: <1191159306.2127.13.camel@viola.izb.knu.ac.kr>

On Sun, 2007-09-30 at 12:33 +0200, morphine wrote:
> Byung-Hee HWANG wrote:
> 
> > Hi there,
> > 
> > What is different between Ruby and Python? I am wondering what language
> > is really mine for work. Somebody tell me Ruby is clean or Python is
> > really easy! Anyway I will really make decision today what I have to
> > study from now on. 
> 
> What kind of advice do you expect on a NG called comp.lang.PYTHON ?
                                                            ^^^^^^^^
Your advice is the best.. really it hit my head very strongly..

> 
> > What I make the decision is more difficult than to 
> > know why I have to learn English. Yeah I do not like to learn English
> > because it is just very painful..
> 
> Then stop learning it ;)
 ^^^^^^^^^^^^^^^^^^^^^^^
You are bad.. I'm really pain..

sorry for noise.. but I really wanted to say about the above matters.. 




From jjl at pobox.com  Thu Sep 20 15:18:25 2007
From: jjl at pobox.com (John J. Lee)
Date: Thu, 20 Sep 2007 19:18:25 GMT
Subject: Python tickets summary
References: <e04bdf310709101325o1315adb0pebcb2f33d8313f35@mail.gmail.com>
	<mailman.783.1190234515.2658.python-list@python.org>
Message-ID: <87hclpjgce.fsf@pobox.com>

"Facundo Batista" <facundobatista at gmail.com> writes:
[...]
> Based on an idea from Dennis Benzinger, now the temporal bars show the
> moments where each comment was made, so it's easy to see the "rhythm"
> of the ticket activity:
>
>   http://www.taniquetil.com.ar/facundo/py_tickets.html

I like that.  I've often scrolled up and down tickets trying to get a
sense of what your display tells you at a glance.


John


From garywlee at gmail.com  Sun Sep 16 08:28:48 2007
From: garywlee at gmail.com (GaryLee)
Date: Sun, 16 Sep 2007 05:28:48 -0700
Subject: Can't see the arguements when use Python in WSH.
Message-ID: <1189945728.024735.3960@w3g2000hsg.googlegroups.com>

Hi, Folks:

I am using Python in WSH. However, I got a strange problem on my
computer. Here is a small program to show the problem.

# xxx.pys
objArgs = WScript.Arguments
for i in xrange(objArgs.Count()):
    WScript.Echo(objArgs(i))
WScript.Echo('Total %d arguments.' % objArgs.Count())

If I execute this document by following command, the objArgs.Count()
always return 0 and no argument was included.
> xxx.pys 1 2 3 4

Because, the script will show "Totals 0 arguments", the program can be
executed normally. It just can't get the arguments. However, if I use
following command to execute the script. I can get the arguments.
> wscript.exe xxx.py 1 2 3 4

If I drag some documents and drop them onto the icon of xxx.pys file,
it still can't get the arguments. I am sure that the DropHandler has
been set properly.

Finally, I use a wsf file to embeded the same script file. It looks
like this:

<?xml version="1.0" ?>
<package id="xxx">
<job id="myjob">
<comment>blah blah</comment>
<script language="python">
<![CDATA[
objArgs = WScript.Arguments
for i in xrange(objArgs.Count()):
    WScript.Echo(objArgs(i))
WScript.Echo('Total %d arguments.' % objArgs.Count())
]]>
</script>
</job>
</package>

This wsf file can work very well. When I drop some files onto it, it
can show the path of those documents. However, I just want to know why
my pys file can't work.

Does anyone have the same situation? Is it my pywin32 package
corrupted? I've downloaded the last pywin32 package and executed the
site-packages\win32comext\axscript\client\pyscript.py to register the
PyScript. But, the problem is still there.

Sincerely yours,
Gary



From rhamph at gmail.com  Fri Sep  7 12:46:00 2007
From: rhamph at gmail.com (Rhamphoryncus)
Date: Fri, 07 Sep 2007 16:46:00 -0000
Subject: concise code (beginner)
In-Reply-To: <1189108607.080926.103650@19g2000hsx.googlegroups.com>
References: <13dsvqrqivtf092@corp.supernews.com>
	<fbmrsg$dsi$1@daisy.noc.ucla.edu>
	<1189020188.842700.50950@d55g2000hsg.googlegroups.com>
	<fbn42h$k37$1@daisy.noc.ucla.edu>
	<1189108607.080926.103650@19g2000hsx.googlegroups.com>
Message-ID: <1189183560.572177.56930@r34g2000hsd.googlegroups.com>

On Sep 6, 1:56 pm, Karthik Gurusamy <kar1... at gmail.com> wrote:
> That said, it may be a good future language enhancement to define a
> reasonable consistent behavior for an iterator over a changing
> collection. This occurs quite common when we walk a collection and
> usually delete the current item.
>
> For a sequence, what the expected behavior is quite obvious (just
> remove this element and go over to the next). For other collections
> like dictionary/set, again if the operation is delete, the expected
> behavior is obvious. If we are doing insertion, for sequence a well-
> defined behavior can be formulated (based on insert before or after
> current position -- if after we will see it in the walk, if before we
> won't see it) . For dict/set I see this isn't simple (as based on hash
> key we may insert ahead or later of the current 'cursor'/position.

Removing from a list while you iterate will had quadratic performance
though.  O(n) to find the element you wish to remove and move over
everything after it, multiplied by your original O(n) of iterating,
gives O(n**2).  That, combined with the fact that adding enough
accounting to invalidate or update your iterator would be a cost on
all the correct users too, is why it's not done.

The best approach in almost all cases in python is to create a new
container as you iterate over the old one.  After you finish, you
replace the old one with the new one.  This lets you keep an overall
O(n) performance, as well as avoiding the tricky semantics.

--
Adam Olsen, aka Rhamphoryncus



From llothar at web.de  Sun Sep  2 22:16:19 2007
From: llothar at web.de (llothar)
Date: Sun, 02 Sep 2007 19:16:19 -0700
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
In-Reply-To: <mailman.303.1188779927.28954.python-list@python.org>
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<dea92f560709021735l2c72d53ew94410fcb33b9b50b@mail.gmail.com>
	<mailman.303.1188779927.28954.python-list@python.org>
Message-ID: <1188785779.956824.143860@w3g2000hsg.googlegroups.com>

On 3 Sep., 07:38, "Eduardo O. Padoan" <eduardo.pad... at gmail.com>
wrote:
> > No.http://www.artima.com/weblogs/viewpost.jsp?thread=211430
>
> Ops, I meant:http://www.artima.com/forums/threaded.jsp?forum=106&thread=211200
>

Thanks. I whish there would be a project for rewritting the C
interpreter
to make it better and more useable for threading use.

But the CPU infrastructure is also not perfect enough so maybe it's
good to
wait with this a few more years until Intel and AMD know what they are
doing.




From gregpinero at gmail.com  Mon Sep 24 17:22:40 2007
From: gregpinero at gmail.com (gregpinero at gmail.com)
Date: Mon, 24 Sep 2007 21:22:40 -0000
Subject: subprocess -popen - reading stdout from child - hangs
In-Reply-To: <1190530682.420121.31520@y42g2000hsy.googlegroups.com>
References: <1190518129.356844.242710@19g2000hsx.googlegroups.com>
	<1190530682.420121.31520@y42g2000hsy.googlegroups.com>
Message-ID: <1190668960.766658.235070@g4g2000hsf.googlegroups.com>

On Sep 23, 2:58 am, Karthik Gurusamy <kar1... at gmail.com> wrote:
> On Sep 22, 8:28 pm, "gregpin... at gmail.com" <gregpin... at gmail.com>
> wrote:
>
> > Let's say I have this Python file called loop.py:
>
> > import sys
> > print 'hi'
> > sys.stdout.flush()
>
> Add sys.stdout.close()
>

Adding sys.stdout.close() and removing sys.stdout.flush() seems to
make it work.  But can the while loop still use sys.stdout later on?
Do I have to reopen it?

Thanks,

Greg




From sergio.correia at gmail.com  Fri Sep  7 02:30:00 2007
From: sergio.correia at gmail.com (Sergio Correia)
Date: Fri, 7 Sep 2007 01:30:00 -0500
Subject: Why 'class spam(object)' instead of class spam(Object)' ?
Message-ID: <f1aa6d810709062330s3589cdb3s80c0d65e4d49b098@mail.gmail.com>

Hi, I'm kinda new to Python (that means, I'm a total noob here), but
have one doubt which is more about consistency that anything else.

Why if PEP 8 says that "Almost without exception, class names use the
CapWords convention", does the most basic class, object, is lowercase?

I found a thread about this:
http://mail.python.org/pipermail/python-list/2007-April/437365.html
where its stated that -object- is actually a type, not a class; but
the idea still doesn't convince me.

If i create a class Spam using -object- as a parent class, I would
expect -object- to be a class, not a type as in type(object) (what is
the difference between both btw?). But, on the other hand, if I do
help(object), I get:

>>> help(object)
Help on class object in module __builtin__:

class object
 |  The most base type

So is this a class? No...

>>> object
<type 'object'>

My doubts get compounded when strange stuff starts to happen:

>>> class Eggs(object):
	def __init__(self):
		self.x = 1
>>> type(Eggs)
<type 'type'>

Type 'type'? What is that supposed to mean?

Hope this makes any sense ;),

Sergio


From arkanes at gmail.com  Wed Sep  5 10:36:51 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 5 Sep 2007 09:36:51 -0500
Subject: Checking if elements are empty
In-Reply-To: <fbme5d$qa$1@sea.gmane.org>
References: <2323A6D37908A847A7C32F1E3662C80E010A0246@dc1ex01.air.org>
	<fbme5d$qa$1@sea.gmane.org>
Message-ID: <4866bea60709050736t5f9f6759x4a8b685bc9ad4ec@mail.gmail.com>

On 9/5/07, Steve Holden <steve at holdenweb.com> wrote:
> Doran, Harold wrote:

> >
> > Is there a way to check if the first element of y is null?
> >
>
> len(y[0]) == 0
>
> would be the obvious way, assuming "null" means "the null string".
>

Better spelled as

if y[0]:


From ivoras at _fer.hr_  Thu Sep 13 09:53:45 2007
From: ivoras at _fer.hr_ (Ivan Voras)
Date: Thu, 13 Sep 2007 15:53:45 +0200
Subject: Parallel/Multiprocessing script design question
In-Reply-To: <yK3Gi.61203$Pv4.51195@newsfe19.lga>
References: <yK3Gi.61203$Pv4.51195@newsfe19.lga>
Message-ID: <fcbfda$tui$1@news2.carnet.hr>

Amit N wrote:

> About 800+ 10-15MB files are generated daily that need to be processed. The 
> processing consists of different steps that the files must go through:
> 
> -Uncompress
> -FilterA
> -FilterB
> -Parse
> -Possibly compress parsed files for archival

You can implement one of two easy straightforward approaches:

1 - Create one program, start N instances of it, where N is the number 
of CPUs/cores, and let each process one file to completion. You'll 
probably need an "overseer" program to start them and dispatch jobs to 
them. The easiest is to start your processes with first N files, then 
monitor them for completion and when any of them finishes, start another 
with the next file in queue, etc.

2 - Create a program / process for each of these steps and let the steps 
operate independently, but feed output from one step to the input of the 
next. You'll probably need some buffering and more control, so that if 
(for example) "FilterA" is slower then "Uncompress", the "Uncompress" 
process is signaled to wait a little until "FilterA" needs more data. 
The key is that, as long as all the steps run at approximatly the same 
speed, they can run in parallel.

Note that both approaches are in principle independent on whether you 
use threads or processes, with the exception of communication between 
the steps/stages, but you can't use threads in python if your goal is 
parallel execution of threads.


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From software at ginstrom.com  Wed Sep  5 04:44:47 2007
From: software at ginstrom.com (Ryan Ginstrom)
Date: Wed, 5 Sep 2007 17:44:47 +0900
Subject: Printing lists in columns
In-Reply-To: <1188979665.052672.211110@r34g2000hsd.googlegroups.com>
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com><mailman.315.1188810174.28954.python-list@python.org><46dbd11e$0$6228$426a74cc@news.free.fr><mailman.317.1188812089.28954.python-list@python.org><1188816626.021956.281040@22g2000hsm.googlegroups.com><5k2cjmF1r2aiU1@mid.uni-berlin.de><1188836008.656284.76160@o80g2000hse.googlegroups.com><46dc6f49$0$6207$426a34cc@news.free.fr><1188900397.459760.259580@k79g2000hse.googlegroups.com><slrnfdqe3t.i4p.hat@se-162.se.wtb.tue.nl><Xns99A17FAC2587duncanbooth@127.0.0.1><1188906767.737741.267350@19g2000hsx.googlegroups.com><Xns99A18F8C528BCduncanbooth@127.0.0.1><1188913394.763871.218660@d55g2000hsg.googlegroups.com><46dd69b1$0$24998$426a74cc@news.free.fr><1188917550.261894.84010@k79g2000hse.googlegroups.com><46ddbb26$0$18672$426a74cc@news.free.fr>
	<1188979665.052672.211110@r34g2000hsd.googlegroups.com>
Message-ID: <011c01c7ef99$0447fd50$0303a8c0@MOUSE>

> On Behalf Of cjt22 at bath.ac.uk
> bo, daf, da
> pres, ppar, xppc
> magnjklep, *, dsa
> *, *, nbi
> 
> But I want it justified, i.e:
> 
> bo       ,  daf,  da
> pres     , ppar,  xppc
> magnjklep,    *,  dsa
> *        ,    *,  nbi

Once you have a nice rectangular list of lists, you might want to take a
look at my padnums module.

# Usage:
import padnums
import sys

table = [row for row in izip_longest(*d, fillvalue='*')]
padnums.pprint_table(sys.stdout, table)

Code described here, with link to module:
http://ginstrom.com/scribbles/2007/09/04/pretty-printing-a-table-in-python/

Regards,
Ryan Ginstrom



From sean.pythonlist at gmail.com  Fri Sep 28 18:38:40 2007
From: sean.pythonlist at gmail.com (sean tierney)
Date: Fri, 28 Sep 2007 15:38:40 -0700
Subject: your opinion on book "Foundations of Python Network Programming"?
In-Reply-To: <1191016773.834049.8940@19g2000hsx.googlegroups.com>
References: <1191016773.834049.8940@19g2000hsx.googlegroups.com>
Message-ID: <8cfa857a0709281538k3df9bd19yf1e54496d03f1319@mail.gmail.com>

I just read it (though I bought it half a year ago...don't judge :).

Author recommends Python 2.3 and above...and as far as I know the
examples are good.  And if anything IS outdated -- you'll be able to
do some quick research to get you to where you need to be...and he
does mention code several areas of change/addition/modification. (ie
urllib and urllib2).  He uses a couple of 3rd party projects too.

I really liked the book.  I think Goerzen did a good job.  He
addresses the code in the context of the problem the code is meant to
solve, which I found helpful.  That said, it's not a substitute for
actually reading the code.

...if you haven't read the most recent edition of Programming Python
by Mark Lutz (O'Reilly), I'd recommend that first.  Programming Python
covers (some) networking and everything else.  More bang for the $$.



Sean



On 9/28/07, kf9150 at gmail.com <kf9150 at gmail.com> wrote:
> Hello,
>
> i'm debating if i should buy this book. it received good reviews at
> Amazon: http://tinyurl.com/24zvrf. but it was published in 2004 and
> i'm afraid quite some materials might be outdated? any input?
>
> thanks,
>
> kelie
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From stefano.esposito87 at gmail.com  Mon Sep 17 13:11:16 2007
From: stefano.esposito87 at gmail.com (Stefano Esposito)
Date: Mon, 17 Sep 2007 19:11:16 +0200
Subject: How to assign a function to another function
In-Reply-To: <87d4whnsnd.fsf@rudin.co.uk>
References: <mailman.657.1190047202.2658.python-list@python.org>
	<87d4whnsnd.fsf@rudin.co.uk>
Message-ID: <20070917191116.603b7ec7.stefano.esposito87@gmail.com>

On Mon, 17 Sep 2007 17:49:58 +0100
Paul Rudin <paul.nospam at rudin.co.uk> wrote:

> Stefano Esposito <stefano.esposito87 at gmail.com> writes:
> 
> > Hi all
> >
> > what i'm trying to do is this:
> >
> >>>>def foo ():
> > ...	return None
> > ...
> >>>>def bar ():
> > ...	print "called bar"
> > ...
> >>>>def assigner ():
> > ...	foo = bar
> > ...
> >>>>assigner()
> >>>>foo()
> > called bar
> >>>>
> >
> > This piece of code is not working and even trying with...
> 
> 
> > ... How can I achieve my goal?
> 
> 
> By adding the line:
>    global foo
> at the beginning of the body of assigner.
> 

This worked, thanks a lot :)


-- 
Stefano Esposito <stefano.esposito87 at gmail.com>


From f.guerrieri at gmail.com  Sun Sep 30 11:48:56 2007
From: f.guerrieri at gmail.com (Francesco Guerrieri)
Date: Sun, 30 Sep 2007 17:48:56 +0200
Subject: s.split() on multiple separators
In-Reply-To: <1191160394.870241.171200@w3g2000hsg.googlegroups.com>
References: <1191160394.870241.171200@w3g2000hsg.googlegroups.com>
Message-ID: <79b79e730709300848l198cccb6r49636e6cba78fede@mail.gmail.com>

On 9/30/07, mrkafk at gmail.com <mrkafk at gmail.com> wrote:
> Hello everyone,
>
> OK, so I want to split a string c into words using several different
> separators from a list (dels).

Have a look at this recipe:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/303342

which contains several ways to solve the problem. You could both
translate all your separators to a single one, and then split over it,
or (maybe the simpler solution) going for the list comprehension
solution.

francesco


From paul.hankin at gmail.com  Wed Sep 26 09:59:40 2007
From: paul.hankin at gmail.com (Paul Hankin)
Date: Wed, 26 Sep 2007 13:59:40 -0000
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <Xns99B7957CCE43Fduncanbooth@127.0.0.1>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>
	<1190753722.026806.254530@d55g2000hsg.googlegroups.com>
	<1190756003.292096.71130@o80g2000hse.googlegroups.com>
	<1190789981.385466.37870@57g2000hsv.googlegroups.com>
	<Xns99B760A3F5859duncanbooth@127.0.0.1>
	<1190805297.182232.116830@50g2000hsm.googlegroups.com>
	<Xns99B7957CCE43Fduncanbooth@127.0.0.1>
Message-ID: <1190815180.945099.248670@n39g2000hsh.googlegroups.com>

On Sep 26, 2:46 pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> Paul Hankin <paul.han... at gmail.com> wrote:
> > More flexibly, keep a set of inserted keys that haven't yet been
> > included in the sorted list, and a set of deleted keys that haven't
> > yet been removed from the sorted list. The cache is invalid if either
> > of these sets are empty - and to make it valid you can choose what to
> > do based on the sizes of the two sets (and the sorted list). For
> > instance, if there's just been one insertion you're probably better
> > doing an insertion rather than a full resort. Of course, there's a few
> > nasty cases here but it's always possible to just throw away the
> > sorted list and reconstruct it from the dict keys when things get too
> > hairy (eg, the user deletes a key that's in the inserted-but-not-yet-
> > sorted set).
>
> Yes that sounds good. Did you mean 'The cache is invalid if either of
> these sets is not empty'?

Yes :)

> If you delete a key which is in the inserted set you can simply delete
> it from the inserted set.

No, in case it was already in the sorted list before the insert. You
have to remove it from the inserted set AND add it to the deleted set.

--
Paul Hankin



From bjorn.kempen at gmail.com  Sun Sep 16 06:06:23 2007
From: bjorn.kempen at gmail.com (buffi)
Date: Sun, 16 Sep 2007 10:06:23 -0000
Subject: generate list of partially accumulated values
In-Reply-To: <1189936979.276166.103080@w3g2000hsg.googlegroups.com>
References: <1189936564.932553.148800@50g2000hsm.googlegroups.com>
	<1189936979.276166.103080@w3g2000hsg.googlegroups.com>
Message-ID: <1189937183.100462.175070@o80g2000hse.googlegroups.com>

Uh... that turned out weird.

Anyways, here goes again

l = [1, 2, 3, 4]
[sum(l[:x+1]) for x in xrange(len(l))]



From kennytilton at optonline.net  Sun Sep 30 20:22:47 2007
From: kennytilton at optonline.net (Ken Tilton)
Date: Sun, 30 Sep 2007 20:22:47 -0400
Subject: The Modernization of Emacs: terminology buffer and keybinding
In-Reply-To: <1191170325.947900.177850@50g2000hsm.googlegroups.com>
References: <1182093200.598418.218620@e9g2000prf.googlegroups.com>
	<1182272495.990807.99110@a26g2000pre.googlegroups.com>
	<87tzt3ihev.fsf@kobe.laptop> <m31wg6lre9.fsf@borud.not>
	<1182370216.961241.6960@n60g2000hse.googlegroups.com>
	<85zm2ufjpb.fsf@lola.goethe.zz>
	<1182372592.803332.288260@u2g2000hsc.googlegroups.com>
	<m3myyt47nq.fsf@latakia.dyndns.org>
	<1182549094.366282.286740@m37g2000prh.googlegroups.com>
	<87bqf7fwmg.fsf@telesippa.clsnet.nl>
	<1182553682.197778.138500@g37g2000prf.googlegroups.com>
	<873b0fhokz.fsf@kobe.laptop> <13frd6vtarbee75@corp.supernews.com>
	<pmnLi.1684$hP.1048@newsfe12.lga>
	<1191170325.947900.177850@50g2000hsm.googlegroups.com>
Message-ID: <t5XLi.109$kd4.32@newsfe12.lga>



Matthias Benkard wrote:
>>So this has nothing to
>>do with freedom in /any/ sense of the word, it has to do with a
>>political agenda opposed to the idea of private property.
> 
> 
> Freedom is inherently political, you know.  You're condemning the FSF
> for being political, although the FSF's stated purpose is a political
> one. 

Oh, I missed that. I just saw something about software should be shared 
and programmers should be content with an hourly wage, not sales.

kt

-- 
http://www.theoryyalgebra.com/

"We are what we pretend to be." -Kurt Vonnegut


From kostaspaxos at yahoo.gr  Thu Sep 13 03:56:40 2007
From: kostaspaxos at yahoo.gr (Konstantinos Pachopoulos)
Date: Thu, 13 Sep 2007 10:56:40 +0300
Subject: cannot declare global vars!
Message-ID: <46E8ED38.6070204@yahoo.gr>

Hi,
i had posted earlier for not being able to declare global vars. No i 
followed the suggestions and created a class, but still the vars do not 
seem to have a global scope. I have tried pretty much everything. Any 
advice appreciated... Here:

========================================================
#!/usr/bin/env jython

#imports
...


class SVNLogs2DBParser:           

    #svnLogging_
    #dbTable_
    #cmterID_
    #projID_
    #fileIDNumber_
    #Commiter_
    #Commit_
    #StoredProject_
    #ProjectVersion_
    #entryList_
   
    def 
__init__(self,svnLogging_=SVNLogging(SVN_REPOS),dbTable_=DBTablesHandler(),cmterID_=0,projID_=0,
    
fileIDNumber_=0,Commiter_={},Commit_={},StoredProject_={},ProjectVersion_={},entryList_={}):    
      

        pass
        #svnLogging_=SVNLogging(SVN_REPOS)  
        #print "Connection established to SVN repository..."       
        #dbTable_=DBTablesHandler()       
        #cmterID_=0
        #projID_=0
        #fileIDNumber_=0
        #Commiter_={}
        #Commit_={}
        #StoredProject_={}       
        #ProjectVersion_={}
        #entryList_={}



    #reads all the revision logs (traversing them PIVOT at a time) and
    #processes each log entry
    def getLogsLoop(self):
   
   
        while 
svnLogging_.getCurrentRevisionNumber()!=svnLogging_.getLatestRevisionNumber():    
                                                   
            entryList_=svnLogging_.getNextLogs(PIVOT);
            #print "Attempting to go over the HEAD revision..."   

            for entry in self.entryList:
                print "processing new SVN entry..."
                processLogEntry(entry)

            entryList_.clear()   



    #processes each log entry
    #
    #"entry" is of type SVNLogEntry. See SVNKit API   
    #"changedPaths" is returned as a java.util.HashMap
    #with key strings (paths) and values SVNLogEntryPath objects
    #"entry.getDates()" returns a java.util.Date object
    def processLogEntry(self, entry):
        revision = int(entry.getRevision())
        commiter = str(entry.getAuthor()) 
        datetime = getTimeStamp(entry.getDate())
        message = str(entry.getMessage())       
        changedPaths = entry.getChangedPaths()  
       
        #array passed for updating the  Commiter DB table
        Commiter_[0] = cmterID_
        Commiter_[1] = commiter
        dbTable_.updateCommiterTable(Commiter_)

        #array passed for updating the Commit DB table
        Commit_[0] = projID_
        Commit_[1] = datetime   
        Commit_[2] = cmterID_
        Commit_[3] = 0.0
        Commit_[4] = "" #properties
        fileStats=getFileTypes(changedPaths)
        Commit_[5] = fileStats[0]
        Commit_[6] = fileStats[2]
        Commit_[7] = fileStats[1]
        Commit_[8] = fileStats[3]
        Commit_[9] = fileStats[4]       
        dbTable_.updateCommitTable(self.Commit_)


        ProjectVersion_[0]=projID_
        ProjectVersion_[1]=0.0
        dbTable_.updateProjectVersionTable(ProjectVersion_)


        Project[0]=projID_
        Project[1]=""
        Project[2]=""
        Project[3]=""
        Project[4]=""            
        
dbTable_.updateProjectTable(Project_)                                     

        cmterID_+=1           
        projID_+=1


    
##############################HELPER##METHODS###############################    

 ....

    
##############################HELPER##METHODS###############################



From bj_666 at gmx.net  Thu Sep  6 04:02:13 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 6 Sep 2007 08:02:13 GMT
Subject: concise code (beginner)
References: <13dsvqrqivtf092@corp.supernews.com>
	<13dv4uqqb806ff0@corp.supernews.com>
Message-ID: <5k9qg5F2mrncU2@mid.uni-berlin.de>

On Thu, 06 Sep 2007 15:44:57 +1000, bambam wrote:

> def script(self)
>     def a0010(): global self; self.power_on([self.dev]);
>     def a0020(): global self; self.dev.addLog([self.name, ' started']);
>     def a0030(): global self; self.resetMinuteReg([self.dev]);
>     def a0040(): global self; self.disablePLmessages([self.dev]);
>     def a0050(): global self; self.dev.testH.writePLram((PL.BCAL12<<8));

What is this ``global self`` meant to do?  And the first line is missing a
colon at the end.

Ciao,
	Marc 'BlackJack' Rintsch


From bj_666 at gmx.net  Mon Sep 10 09:57:14 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 10 Sep 2007 13:57:14 GMT
Subject: Using a time duration to print out data where every 2 seconds
	is a pixel
References: <1189427545.322679.260970@r29g2000hsg.googlegroups.com>
	<slrnfeaips.m47.hat@se-162.se.wtb.tue.nl>
Message-ID: <5kl0pqF3vfqqU7@mid.uni-berlin.de>

On Mon, 10 Sep 2007 15:48:44 +0200, A.T.Hofkamp wrote:

> (I have seen references to a module called datetime, but I have never used such
> a module so no idea what it is or where to get it).

It's just an import away -- in the standard library.  :-)

Ciao,
	Marc 'BlackJack' Rintsch


From rrr at ronadam.com  Sat Sep 22 03:02:57 2007
From: rrr at ronadam.com (Ron Adam)
Date: Sat, 22 Sep 2007 02:02:57 -0500
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <13f8unjjeqs5p97@corp.supernews.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>	<mailman.900.1190414696.2658.python-list@python.org>	<1190415741.380795.259050@y42g2000hsy.googlegroups.com>
	<13f8unjjeqs5p97@corp.supernews.com>
Message-ID: <46F4BE21.2050800@ronadam.com>



Scott David Daniels wrote:
> Cristian wrote:
>> On Sep 21, 3:44 pm, Ron Adam <r... at ronadam.com> wrote:
>>
>>> I think key may be to discuss names and name binding with your friend.
> 
> Here's an idea:
> 
> import math
> 
> def sin_integral(start, finish, dx):
>      total = 0.0
>      y0 = math.sin(start)
>      for n in range(1, 1 + int((finish - start) / float(dx))):
>          y1 = math.sin(start + n * dx)
>          total += (y0 + y1)
>          y0 = y1
>      return total / 2. * dx
> 
> 
> def cos_integral(start, finish, dx):
>      total = 0.0
>      y0 = math.sin(start)
>      for n in range(1, 1 + int((finish - start) / float(dx))):
>          y1 = math.cos(start + n * dx)
>          total += (y0 + y1)
>          y0 = y1
>      return total / 2. * dx
> 
> generalize and separate the integration technique from the
> function it integrates.


How about this?

It's based on the apple basic program example in How to Enjoy Calculus.


    Ron




import math

def integrate(fn, x1, x2, n=100):
     # Calculate area of fn using Simpson's rule.
     width = float(x2 - x1) / n
     area = fn(x1)
     if n % 2 != 0:     # make sure its even
         n += 1
     for n in range(1, n):
         x = x1 + n * width
         if n % 2 == 0:
             area += 2.0 * fn(x)
         else:
             area += 4.0 * fn(x)
     area += fn(x2)
     return area * (width / 3.0)


def fn(x):
     return x**2

print "Area of fn:", integrate(fn, 0, 2)

print "Area of cos fn:", integrate(math.cos, 1, 2)

print "Area of sin fn:", integrate(math.sin, 1, 2)




Area of fn: 2.66666666667
Area of cos fn: 0.0678264420216
Area of sin fn: 0.956449142468





From paul.hankin at gmail.com  Tue Sep 25 17:33:23 2007
From: paul.hankin at gmail.com (Paul Hankin)
Date: Tue, 25 Sep 2007 21:33:23 -0000
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <1190753722.026806.254530@d55g2000hsg.googlegroups.com>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>
	<1190753722.026806.254530@d55g2000hsg.googlegroups.com>
Message-ID: <1190756003.292096.71130@o80g2000hse.googlegroups.com>

On Sep 25, 9:55 pm, Mark Summerfield <m.n.summerfi... at googlemail.com>
wrote:
> ...
> class sorteddict(dict):
>
> ...
>         if self.__keys is None:
>             self.__keys = sorted(dict.keys(self), cmp=self.__cmp,
>                                  key=self.__key,
> reverse=self.__reverse)

You'd be better defining __keys like this:

def __getkeys(self):
  if self.__keycache is None:
     self.__keycache = dict.keys(self)
     self.__keycache.sort(cmp=...)
  return self.__keycache

__keys = property(__getkeys)

and where you have 'self.__keys = None', either replace with
'self.__keycache = None' or more cleanly with a call to:

def __invalidate_key_cache(self):
    self.__keycache = None

to improve the code quality.

--
Paul Hankin



From deets at nospam.web.de  Fri Sep 21 10:44:17 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 21 Sep 2007 16:44:17 +0200
Subject: Remote Command a Python Script
References: <1190384953.774277.249350@k79g2000hse.googlegroups.com>
Message-ID: <5li3m1F8cdk0U1@mid.uni-berlin.de>

Ulysse wrote:

> Hello,
> 
> I've installed Python 2.5 on my WRT54G Linksys Router. On this router
> a script is executed. This script write a little Pickle database in
> the router memory.
> 
> I would like to write another Python script which will be able to :
> 
> 1. Stop and start the remote script from my Windows Computer. At
> present I use Putty to connect to the router by the SSL, then I
> manually kill the python process.
> 
> 2. Retrieve the little database located in router memory and backup it
> on my Window PC. At present I use WinSCP (like FTP) to get the pickle
> file.
> 
> Can you help me with that (modules to use, useful code snippets)

Check out pyro.

Diez


From hpepper at gmail.com  Tue Sep 11 06:22:24 2007
From: hpepper at gmail.com (HowiPepper)
Date: Tue, 11 Sep 2007 03:22:24 -0700
Subject: why should I learn python
In-Reply-To: <1189506021.315340.108490@y42g2000hsy.googlegroups.com>
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
	<1189506021.315340.108490@y42g2000hsy.googlegroups.com>
Message-ID: <1189506144.628422.93260@w3g2000hsg.googlegroups.com>

Sorry Nicolaas, I didn't mean to misspell your name!

Regards,
Howard



From chaelon at gmail.com  Sat Sep 22 21:09:01 2007
From: chaelon at gmail.com (chaelon at gmail.com)
Date: Sun, 23 Sep 2007 01:09:01 -0000
Subject: find difference in days from YYYYMMDD to YYYYMMDD
In-Reply-To: <mailman.920.1190453625.2658.python-list@python.org>
References: <mailman.920.1190453625.2658.python-list@python.org>
Message-ID: <1190509741.062389.232920@d55g2000hsg.googlegroups.com>

On Sep 22, 5:37 am, Konstantinos Pachopoulos <kostaspa... at yahoo.gr>
wrote:
> Hi,
> does any body now any such algorith? to find difference in days from
> YYYYMMDD to YYYYMMDD?
> Or just an algorithm, that converts YYYYMMDD to seconds since the epoch?
>
> Thanks

Seen some complex answers here.  Let's keep it dead simple.  Use the
datetime module to do the heavy lifting.  Go to IDLE, write this.

import datetime.

Then start to write this:

difference = datetime.date(

and at that point IDLE will tell you to put in year,month,day.  That's
convenient.  Do as IDLE asks, obey IDLE!  Wind up with this (put date
later in history first, here are two I've used):

difference = datetime.date(2007,9,25) - datetime.date(1970,12,25)
print difference

13419 days, 0:00:00

Hey now!  Date math!  Yeah!



From gherzig at fmed.uba.ar  Mon Sep 24 08:45:45 2007
From: gherzig at fmed.uba.ar (Gerardo Herzig)
Date: Mon, 24 Sep 2007 09:45:45 -0300
Subject: database persistence with mysql, sqlite
In-Reply-To: <1190502677.970811.181100@22g2000hsm.googlegroups.com>
References: <1190502677.970811.181100@22g2000hsm.googlegroups.com>
Message-ID: <46F7B179.9050100@fmed.uba.ar>

coldpizza wrote:

>Hi,
>
>I want to run a database query and then display the first 10 records
>on a web page. Then I want to be able to click the 'Next' link on the
>page to show the next 10 records, and so on.
>
>My question is how to implement paging, i.e. the 'Next/Prev' NN
>records without reestablishing a database connection every time I
>click Next/Prev? Is it at all possible with cgi/mod_python?
>
>For example, in a NON-web environment, with sqlite3 and most other
>modules, I can establish a database connection once, get a cursor
>object on which I run a single 'SELECT * FROM TABLE' statement and
>then use cursor.fetchmany(NN) as many times as there are still results
>left from the initial query.
>
>How do I do the same for the web? I am not using any high-level
>framework. I am looking for a solution at the level of cgi or
>mod_python (Python Server Pages under Apache). To call
>cursor.fetchmany(NN) over and over I need to pass a handle to the
>database connection but how do I keep a reference to the cursor object
>across pages? I use mysql and sqlite3 as databases, and I am looking
>for an approach that would work with both database types (one at a
>time). So far I have successfully used the following modules for
>database access: sqlite3, mysqld, and pyodbc.
>  
>
Apache/cgi just dont work this way. When apache receives a new request 
(a cgi being called), it starts a new thread, it execute him, and gives 
the client some result. AND THEN KILL THE THREAD. Altough i never used 
it, what i think you need is fast cgi (fcgi), wich takes care of 
persistent connections to a web server.

Cheers.
Gerardo


From whamil1 at entergy.com  Wed Sep 12 10:39:41 2007
From: whamil1 at entergy.com (Hamilton, William )
Date: Wed, 12 Sep 2007 09:39:41 -0500
Subject: An ordered dictionary for the Python library?
In-Reply-To: <1189605843.866907.117370@w3g2000hsg.googlegroups.com>
Message-ID: <588D53831C701746A2DF46E365C018CE01D2CB41@LITEXETSP001.etrsouth.corp.entergy.com>

> From: Michele Simionato
> 
> On Sep 12, 3:54 pm, Mark Summerfield <m.n.summerfi... at googlemail.com>
> wrote:
> > On 12 Sep, 13:46, Michele Simionato <michele.simion... at gmail.com>
> >
> > Actually I meant by key order, so insertion order doesn't matter at
> > all. If you need a dictionary-like data structure that respects
> > insertion order you could use a list of (key, value) tuples.
> >
> > Another respondent asked about use cases.
> >
> > I have found time and again that I needed (key, value) pairs where
the
> > key is some string that provides a representation for human readers
> > and the value is some internal key (e.g., database ID) that the
system
> > uses internally. In these cases I often need to present the user
with
> > a list of items from which to choose and want to present them in
> > sorted order. Naturally, I could use an ordinary dict and then do
> > this:
> >
> > for string in sorted(d.keys()):
> >     process(string)
> >
> > But what happens when I need to do this a *lot* and when the number
of
> > items is hundreds or a few thousands? I'm having to sort again and
> > again, since it is often the case that the items in the list changes
> > during the runtime of the application. So my solution in C++ is to
use
> > an ordered dictionary (a map in C++ jargon), which in Python means I
> > can simply write:
> >
> > for string in od.keys():
> >     process(string)
> >
> 
> For your use case I would wrap a list [(key, value)] with a dict-like
> object and I would use the bisect module in the standard library to
> keep
> the inner list ordered.


Or subclass dict to carry along a sorted list of keys with it and return
that when dict.keys() is called.  Even better, only have .keys() sort
the keys list when a key has been added to it since the last call.


--
-Bill Hamilton


From jcd at sdf.lonestar.org  Tue Sep 11 06:41:51 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Tue, 11 Sep 2007 06:41:51 -0400
Subject: Modul (%) in python not like in C?
In-Reply-To: <EAoFi.6785$JD.2181@newssvr21.news.prodigy.net>
References: <mailman.294.1189364475.2658.python-list@python.org>	<TM0Fi.4172$FO2.18@newssvr14.news.prodigy.net>	<13ec37dri08s7a3@corp.supernews.com>
	<EAoFi.6785$JD.2181@newssvr21.news.prodigy.net>
Message-ID: <46E670EF.7020207@sdf.lonestar.org>

Bryan Olson wrote:
> Scott David Daniels wrote:
>   
>> C, which was designed as a "high level assembly language," does not
>> tightly define the results of / and % for negative numbers.  Instead
>> it defines the result for positive over positive, and constrains the
>> result for the others. 
>>     
>
> Not true. Here it is again:
>
>      When integers are divided, the result of the / operator is
>      the algebraic quotient with any fractional part discarded.(87)
>      If the quotient a/b is representable, the expression
>      (a/b)*b + a%b shall equal a.
>      [...]
>      87) This is often called ??truncation toward zero??.
>
>      [International Standard ISO/IEC 9899:1999, Section 6.5.5
>      Multiplicative operators, Paragraph 6 and footnote 87]
>
>
>   
But C was around for a long time before the 1999 standard.  C89,
commonly called ANSI C, is still very commonly used in compilers, and
K&R C goes back to 1972.  Is truncation toward 0 the standard for K&R C
as well? 

Cheers,
Cliff


From ldo at geek-central.gen.new_zealand  Wed Sep 26 04:31:44 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Wed, 26 Sep 2007 20:31:44 +1200
Subject: database persistence with mysql, sqlite
References: <1190502677.970811.181100@22g2000hsm.googlegroups.com>
	<mailman.993.1190636458.2658.python-list@python.org>
	<1190650748.590245.221490@n39g2000hsh.googlegroups.com>
	<HSnKi.35782$RX.34622@newssvr11.news.prodigy.net>
Message-ID: <fdd5dg$o0o$4@lust.ihug.co.nz>

In message <HSnKi.35782$RX.34622 at newssvr11.news.prodigy.net>, Bryan Olson
wrote:

> coldpizza wrote:
>> It turned out that the method above ('SELECT * FROM TABLE LIMIT L1,
>> L2') works ok both with mysql and sqlite3, therefore I have decided to
>> stick with it until I find something better. With Sqlite3 you are
>> supposed to use LIMIT 10 OFFSET NN, but it also apparently supports
>> the mysql syntax (LIMIT NN, 10) for compatibility reasons.
> 
> A more reliable form is along the lines:
> 
>      SELECT keyfield, stuff
>      FROM table
>      WHERE keyfield > ?
>      ORDER BY keyfield
>      LIMIT 10
> 
> With the right index, it's efficient.

But that involves keeping track of the right starting keyfield value for the
next batch of records, which is complicated and nontrivial. Simpler to let
the DBMS do the work for you.


From oviedolilliam at gmail.com  Mon Sep 17 14:59:40 2007
From: oviedolilliam at gmail.com (lilly)
Date: Mon, 17 Sep 2007 18:59:40 -0000
Subject: Free trips around the globe!!!!!!!!!!
In-Reply-To: <1190054010.350444.11150@19g2000hsx.googlegroups.com>
References: <1190054010.350444.11150@19g2000hsx.googlegroups.com>
Message-ID: <1190055580.004195.87900@k79g2000hse.googlegroups.com>

On Sep 17, 2:33 pm, nutsbreak... at gmail.com wrote:
> http://world-traveling-destinations.blogspot.com/

this is good



From jUrner at arcor.de  Thu Sep 13 21:35:08 2007
From: jUrner at arcor.de (=?iso-8859-1?q?J=FCrgen_Urner?=)
Date: Thu, 13 Sep 2007 18:35:08 -0700
Subject: An ordered dictionary for the Python library?
In-Reply-To: <7xps0mmig9.fsf@ruckus.brouhaha.com>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<7xzlzrtrjn.fsf@ruckus.brouhaha.com>
	<1189664832.876539.86800@k79g2000hse.googlegroups.com>
	<7xps0mmig9.fsf@ruckus.brouhaha.com>
Message-ID: <1189733708.659317.83950@y42g2000hsy.googlegroups.com>

Puh, what a discussion... most common use case I can think of is

>> d = {'a': 1, 'b': 2, 'c': 3}
>> for key in d:
>>     # do something that relies on order of keys as specified in the constructor


It's a bit tireing having to type

>> for key in sorted(d.keys()):
>>     do_somethig_with(d[key])

instead of a trustfully

>> for value in d.values():
>>     do_somethig_with(value)

As far as I can see much cleaner. No black magic needed ++ sort the
dict
to another order and rely on the sort order being stable would be a
really
a nice thing to have.


My 2 cents,  J?rgen



From timaranz at gmail.com  Tue Sep 18 21:23:48 2007
From: timaranz at gmail.com (timaranz at gmail.com)
Date: Tue, 18 Sep 2007 18:23:48 -0700
Subject: no more reload() in py3k
Message-ID: <1190165028.837799.220300@q3g2000prf.googlegroups.com>

Hi all, this is possibly a python-dev question but I'll ask here
first.

Situation:
I work on an application that takes 10-20 seconds to startup plus
opening a document.  To avoid having to restart the entire application
each edit-debug cycle we rely heavily on the reload command. A typical
method in our command dispatcher looks like this:

def edit_something(self, something):
   reload(meshDialogModule)
   dlg = meshDialogModule.MeshDialog(self.app, something)
   dlg.run()

when the application is built into an exe the reload function is
redefined to lambda x: x.
The advantage of this is that every time I open a dialog my latest
changes are applied and the debug cycle is: edit code -> open dialog -
>
test -> close dialog -> edit code, which is many times faster than
restarting the app and opening a project each time.

Question:
I am told to use the exec() statement instead.  I don't see how I can
use exec to reload a module.

Cheers
Tim



From kyosohma at gmail.com  Mon Sep 17 09:06:15 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 17 Sep 2007 06:06:15 -0700
Subject: (wxPython) icon on panel
In-Reply-To: <1189932153.859201.222370@o80g2000hse.googlegroups.com>
References: <1189932153.859201.222370@o80g2000hse.googlegroups.com>
Message-ID: <1190034375.284403.95150@n39g2000hsh.googlegroups.com>

On Sep 16, 3:42 am, Jimmy <mcknight0... at gmail.com> wrote:
> hi,all!
> have you used 'dictionary' of linux, the program that rests on the
> panel as an icon, and when you click on the icon, it will display a
> window and do something. So i'm wondering how to achieve this. I guess
> it's a dialog window, right? but the crucial part is how to minimize
> the program to an icon on the panel and make it responsive to the
> click event.
> thanks in advance!

I've never used this "dictionary" program you're talking about, but I
think I know what you mean. I would recommend that you download the
wxPython Demo and open the main.py file in the "wxPython2.8 Docs and
Demos\demo" subdirectory. There's a class in there called
"DemoTaskBarIcon" which you can use to figure out how to do the whole
iconizing thing.

As for how to minimize to an icon, this is how I do it:

# bind the frame/app to wx.EVT_ICONIZE
self.Bind(wx.EVT_ICONIZE, self.onMinimize)

# hide the frame
def onMinimize(self, event):
   self.frame.Hide()

If you can't get it to work, please ask for help on the wxPython
mailing list: http://www.wxpython.org/maillist.php

They're quite helpful.

Mike



From Michael.J.Fromberger at Clothing.Dartmouth.EDU  Fri Sep 21 08:54:20 2007
From: Michael.J.Fromberger at Clothing.Dartmouth.EDU (Michael J. Fromberger)
Date: Fri, 21 Sep 2007 08:54:20 -0400
Subject: frange() question
References: <fctrc1$doh$1@news.nems.noaa.gov>
Message-ID: <Michael.J.Fromberger-7D753B.08542021092007@localhost>

In article <fctrc1$doh$1 at news.nems.noaa.gov>,
 George Trojan <george.trojan at noaa.gov> wrote:

> A while ago I found somewhere the following implementation of frange():
> 
> def frange(limit1, limit2 = None, increment = 1.):
>      """
>      Range function that accepts floats (and integers).
>      Usage:
>      frange(-2, 2, 0.1)
>      frange(10)
>      frange(10, increment = 0.5)
>      The returned value is an iterator.  Use list(frange) for a list.
>      """
>      if limit2 is None:
>          limit2, limit1 = limit1, 0.
>      else:
>          limit1 = float(limit1)
>      count = int(math.ceil(limit2 - limit1)/increment)
>      return (limit1 + n*increment for n in range(count))
> 
> I am puzzled by the parentheses in the last line. Somehow they make 
> frange to be a generator:
>  >> print type(frange(1.0, increment=0.5))
> <type 'generator'>
> But I always thought that generators need a keyword "yield". What is 
> going on here?

Hi, George,

The expression returned is a "generator expression", 

  return (limit1 + n*increment for n in range(count))

Thus, although frange itself is not written as a generator, it does 
return a generator as its result.  The syntax is like that of list 
comprehensions; see:

  <http://docs.python.org/ref/genexpr.html>

Cheers,
-M

-- 
Michael J. Fromberger             | Lecturer, Dept. of Computer Science
http://www.dartmouth.edu/~sting/  | Dartmouth College, Hanover, NH, USA


From michael at jedimindworks.com  Tue Sep 18 15:29:21 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Tue, 18 Sep 2007 12:29:21 -0700
Subject: Wait For Application Start
In-Reply-To: <79b79e730709180540q2045a086rc6a049f16bd7e7ad@mail.gmail.com>
References: <120025966304300060@unknownmsgid>
	<79b79e730709180540q2045a086rc6a049f16bd7e7ad@mail.gmail.com>
Message-ID: <5AF03B37-0D8A-457E-8995-8C4E578C9550@jedimindworks.com>


On Sep 18, 2007, at 5:40 AM, Francesco Guerrieri wrote:

> On 9/18/07, Robert Rawlins - Think Blue
> <robert.rawlins at thinkbluemedia.co.uk> wrote:
>> This seems like a very logical method, but I'm not sure how to  
>> implement it
>> into my python code? Is there a simple way to make it wait for  
>> that file?
>> Without the need to build my own conditional loop?
>
> I'm not sure why how you could avoid a conditional loop. Could
> something like this work?
>
> import os.path
> import time
>
> while True:
>     if os.path.exists(YOUR_FILE):
>         break
>     time.sleep(30)

or

while not os.path.exists(YOUR_FILE):
     time.sleep(1)





From fd.calabrese at gmail.com  Sun Sep 16 04:26:57 2007
From: fd.calabrese at gmail.com (cesco)
Date: Sun, 16 Sep 2007 08:26:57 -0000
Subject: generating list of sub lists
Message-ID: <1189931217.415065.102820@w3g2000hsg.googlegroups.com>

Hi,

is there a one-liner to accomplish the following task?
>From the list
l = ['string1', 'string2', 'string3']
generate the list of lists
l = [['string1'], ['string1', 'string2'], ['string1', 'string2',
'string3']]

Any help would be appreciated.

Thanks
Francesco



From koutoo at hotmail.com  Mon Sep 24 16:52:52 2007
From: koutoo at hotmail.com (koutoo at hotmail.com)
Date: Mon, 24 Sep 2007 13:52:52 -0700
Subject: Nested For and While Statements
In-Reply-To: <1190666647.199890.174670@o80g2000hse.googlegroups.com>
References: <1190662087.403000.16290@g4g2000hsf.googlegroups.com>
	<1190666647.199890.174670@o80g2000hse.googlegroups.com>
Message-ID: <1190667172.491315.209110@y42g2000hsy.googlegroups.com>

On Sep 24, 3:44 pm, Roberto Bonvallet <rbonv... at gmail.com> wrote:
> On Sep 24, 3:28 pm, kou... at hotmail.com wrote:
>
> > [...] where I start getting some errors.
> > I'm hoping I won't have to post my code
>
> "Doctor, I'm feeling bad.  I hope I won't have to tell you my
> symptoms.  What do I have?"
>
> Please provide the actual errors and the actual code.  It is easier,
> less error prone and more useful to copy and paste them instead of
> writing some pseudocode.  Maybe the repeated index i is a typo you
> made when writing this post and the original code is correct, but we
> don't have any way to know that.
>
> --
> Roberto Bonvallet

Here is my code, in the hopes that there is a reason why it isn't
running.  Thanks guys.

Option Explicit - 'Sorry so use to writing this!

import os, string

# Get filename to work with
workspace = "c:\\temp"
filename = "\AVC1030708.14"
doc1 = workspace + filename

onedoc = open(doc1, "r")
rdoc1 = onedoc.read()
doclist1 = string.split(rdoc1, "\n")
for i in range(8):
    doclist1.pop(0)

length = int(len(newlist1))-2
Nscheme = int(filename[12:14])
numlanes = length/Nscheme

site = filename[4:7]
year = filename[7:9]
month = filename[9:11]
Sscheme = str(Nscheme)

# Get Master AVC Table for Lanes & Direction
fileavc = "\AVCMaster"
doc2 = workspace + fileavc

twodoc = open(doc2, "r")
rdoc2 = twodoc.read()
doclist2 = string.split(rdoc2, "\n")
doclist2.pop(0)

# Dictionary of Zeros to add to Class Fields
addzeros = {1:"0", 2:"00", 3:"000", 4:"0000"}

while doclist1:

    list1 = doclist1[0]
    doclist1.pop(0)
    newlist1 = list1.split(",")
    date1 = newlist1[0]

    if len(newlist1[0])== 8:
        day = date1[2:3]
    else:
        day = date1[2:4]

    if len(day)>1:
        day = "0" +1

    hour = newlist1[1]

    lanex = []
    # Find number of Lanes & Fields
    if numlanes == 2:
        lane1 = newlist1[2:2+Nscheme]
        lanex.append(lane1)
        lane2 = newlist1[2+Nscheme:2+Nscheme*2]
        lanex.append(lane2)
    else:
        lane1 = newlist1[2:2+Nscheme]
        lanex.append(lane1)
        lane2 = newlist1[2+Nscheme:2+Nscheme*2]
        lanex.append(lane2)
        lane3 = newlist1[2+Nscheme*2:2+Nscheme*3]
        lanex.append(lane3)
        lane4 = newlist1[2+Nscheme*3:2+Nscheme*4]
        lanex.append(lane4)

    doctemp = doclist2
    listtemp = doctemp[0]
    avclist = listtemp.split(",")

    while site <> avclist[0]:
        doctemp.pop(0)
        listtemp = doctemp[0]
        avclist = listtemp.split(",")

    dirx = []
    fhlanex = []

    dirx.append(avclist[2])
    fhlanex.append(avclist[3])
    dirx.append(avclist[5])
    fhlanex.append(avclist[6])

    if avclist[8] <> "0":
        dirx.append(avclist[8])
        fhlanex.append(avclist[9])
        dirx.append(avclist [11])
        fhlanex.append(avclist[12])


    for x in range(1, numlanes+1):
        avcclass = []
        Nlanex = []
        for i in range(1,Nscheme+1):
            numzeros = 5 - int(len(lanex[i-1]))
            avcclass.append(addzeros[numzeros] + lanex[i-1])
            Nlanex.append(int(lanex[i-1])

        lanex.pop(0)
        totalclass = sum(Nlanex)
        Stotalclass = str(totalclass)
        #Create 90 Character File for SAS Job
        classsum = avcclass[0] + avcclass[1] + avcclass[2] +
avcclass[3] + avcclass[4] + avcclass[5] \
        + avcclass[6] + avcclass[7] + avcclass[8] + avcclass[9] +
avcclass[10] \
        + avcclass[11] + avcclass[12] + avcclass[13]
        classmn = "C27" + site + dirx[x] + lanex[x] + year + month +
day + hour + Stotalclass + classsum
        break

    avcsasdoc = workspace + "\avcsas.txt"
    fdoc = open(avcsasdoc, "w")
    fdoc.write(classmn)



From nagle at animats.com  Fri Sep 28 01:51:19 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 27 Sep 2007 22:51:19 -0700
Subject: Python 3.0 migration plans?
In-Reply-To: <1190942968.920485.311870@g4g2000hsf.googlegroups.com>
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>
Message-ID: <%q0Li.725$ih1.539@nlpi068.nbdc.sbc.com>

TheFlyingDutchman wrote:
> It seems that Python 3 is more significant for what it removes than
> what it adds.
> 
> What are the additions that people find the most compelling?

    I'd rather see Python 2.5 finished, so it just works.
All the major third-party libraries working and available with
working builds for all major platforms.  That working set
of components in all the major distros used on servers.
The major hosting companies having that up and running on
their servers.  Windows installers that install a collection
of components that all play well together.

    That's what I mean by "working".

				John Nagle


From steve at holdenweb.com  Sat Sep 15 21:16:30 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 15 Sep 2007 21:16:30 -0400
Subject: Python statements not forcing whitespace is messy?
In-Reply-To: <46ec6826$1@news.eftel.com.au>
References: <1189884110.006272.240840@50g2000hsm.googlegroups.com>	<mailman.589.1189887114.2658.python-list@python.org>	<1189890755.870694.29790@r29g2000hsg.googlegroups.com>	<mailman.594.1189893054.2658.python-list@python.org>	<fchku3$n6e$1@daisy.noc.ucla.edu>
	<46ec6826$1@news.eftel.com.au>
Message-ID: <fci05d$ohj$1@sea.gmane.org>

John Machin wrote:
> On 16/09/2007 8:11 AM, James Stroud wrote:
>> Steve Holden wrote:
>>> I don't know why you have a bug up your ass about it, as the
>>> Americans say.
>> I think most Americans say "wild hare up your ass".
> 
> The essence of Steve's point appears to be that the OP has ridden into 
> town to preach a misguided crusade against the heretofore-unknown 
> non-spacing heretics.  It also seems to be alleged that at some stage, 
> the OP's donkey has been severely molested by some malevolent fauna; I 
> am having difficulty understanding the connection between the two 
> themes, and which is cause and which is effect. Enlightenment, please.
> 
I guess I got the metaphor wrong?

Eradicate the ten fetters of Buddhism and you will attain enlightenment.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From exarkun at divmod.com  Fri Sep 28 14:16:20 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Fri, 28 Sep 2007 14:16:20 -0400
Subject: Python 3.0 migration plans?
In-Reply-To: <1191002679.569709.16870@22g2000hsm.googlegroups.com>
Message-ID: <20070928181620.8162.1410141668.divmod.quotient.15562@ohm>

On Fri, 28 Sep 2007 11:04:39 -0700, TheFlyingDutchman <zzbbaadd at aol.com> wrote:
> [snip]
>
>In this case I asked it as part of the original question and it was
>ignored. I have programmed in C and C++ and a little Pascal many years
>ago. I don't remember anything about Higher Order Functions and would
>like to see exactly how you do it and to verify the contention.
>

Perhaps you could do a bit of independent research.  Then your messages
to the group could contain more thoughtful questions and responses.

Jean-Paul


From sreeraj22283 at gmail.com  Thu Sep  6 01:00:05 2007
From: sreeraj22283 at gmail.com (Sreeraj)
Date: Wed, 05 Sep 2007 22:00:05 -0700
Subject: Using wild character
Message-ID: <1189054805.447871.213150@y42g2000hsy.googlegroups.com>

hi,

 I am a beginner in Python. I wish to know how can i filter a list of
strings using wild characters.ie
Lets say i have list countries =
["india","africa","atlanta","artica","nigeria"]. I need only the list
of string starting with 'a'.


thank you

Sreeraj



From steve at REMOVE-THIS-cybersource.com.au  Sun Sep 16 09:31:57 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sun, 16 Sep 2007 13:31:57 -0000
Subject: Needless copying in iterations?
References: <fchk59$mm3$1@daisy.noc.ucla.edu>
	<5l3ab6F5v20uU3@mid.uni-berlin.de> <13eourdrne86e61@corp.supernews.com>
	<874phv42to.fsf@benfinney.id.au> <13epv3fnb6bak15@corp.supernews.com>
	<5l4ghuF655kfU2@mid.uni-berlin.de>
Message-ID: <13eqc2daojgho03@corp.supernews.com>

On Sun, 16 Sep 2007 10:58:07 +0000, Marc 'BlackJack' Rintsch wrote:

> On Sun, 16 Sep 2007 09:50:39 +0000, Steven D'Aprano wrote:
> 
>> The point is rather moot, since CPython (and probably other Pythons) do
>> almost no optimizations. But just because Python is a dynamic language
>> doesn't mean there are no optimizations possible: Haskell is a dynamic
>> language, and there are optimizing compilers for it. Of course, it is
>> much simpler for Haskell, because of the type system it uses.
> 
> What do you mean by Haskell is a dynamic language?  It is statically and
> strict typed and the compiler usually knows all the functions.  No
> "surprises", no side effects, no duck typing.

Haskell's IO monad (and possibly the do monad?) allows side effects. It 
would be a pretty poor programming language that didn't allow input or 
output!

See also http://homepages.cwi.nl/~ralf/OOHaskell/
showing that Haskell can do object-oriented programming, complete with 
mutable objects and side-effects. Although "duck typing" is listed as a 
keyword, I couldn't see any reference to it in the paper.

Haskell uses type inference, and has a "maybe" type for those cases where 
it can't tell what the type will be.

If you still don't accept that Haskell is a dynamic language, for 
whatever definition of dynamic language you use, I'll withdraw the claim 
for the sake of not getting bogged down in long arguments over something 
that was really just a minor point.


-- 
Steven.


From mkent at acm.org  Sat Sep  8 22:53:10 2007
From: mkent at acm.org (Mike Kent)
Date: Sat, 08 Sep 2007 22:53:10 -0400
Subject: APL2007 reminder:  early (cheaper) registration ends Thursday 9/13
Message-ID: <46E36016.1020803@acm.org>

On-line registration is through the OOPSLA registrar

	http://www.regmaster.com/conf/oopsla2007.html


APL 2007 home page

	http://www.sigapl.org/apl2007.html


From zzbbaadd at aol.com  Tue Sep 11 23:27:08 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Tue, 11 Sep 2007 20:27:08 -0700
Subject: Python 3K or Python 2.9?
Message-ID: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>

Python user and advocate Bruce Eckel is disappointed with the
additions (or lack of additions) in Python 3:

http://www.artima.com/weblogs/viewpost.jsp?thread=214112



From stefan.behnel-n05pAM at web.de  Wed Sep 26 07:25:32 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Wed, 26 Sep 2007 13:25:32 +0200
Subject: elementtree question
In-Reply-To: <mailman.1094.1190794841.2658.python-list@python.org>
References: <fd0lmi$pm8$1@foggy.unx.sas.com> <46F76F86.6010307@web.de>
	<mailman.1094.1190794841.2658.python-list@python.org>
Message-ID: <46FA41AC.4070604@web.de>

Fredrik Lundh wrote:
> (this recent lxml habit of using lxml-specific versions of things that
> are trivial to do with the standard API is a bit disappointing.  kind of
> defeats the purpose of having a standard API...)

ElementTree is not the only standard API that lxml is following. Another one
is the standard API of the "list" builtin type, which has an extend() method.

ah-you're-just-jealous-we-had-it-first-ly,

Stefan :)


From gatti at dsdata.it  Thu Sep 27 08:50:45 2007
From: gatti at dsdata.it (gatti at dsdata.it)
Date: Thu, 27 Sep 2007 05:50:45 -0700
Subject: sorteddict [was a PEP proposal, but isn't anymore!]
In-Reply-To: <1190881576.186259.313720@57g2000hsv.googlegroups.com>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190829592.800804.242260@50g2000hsm.googlegroups.com>
	<1190881576.186259.313720@57g2000hsv.googlegroups.com>
Message-ID: <1190897445.179828.291720@y42g2000hsy.googlegroups.com>

I don't see a focused discussion of computational complexity of a
sorted dict; its API cannot be simpler than sorting a dictionary and
it has issues and complications that have already been discussed
without completely satisfactory solutions, so the only possible reason
to adopt a sorted dict is that some important use case for mapping
types becomes significantly cheaper.

With n entries, the size of a non-sorted hashtable, of a hashtable
plus lists or sets of keys, and of reasonable sorted dict
implementations with trees are all O(n). No substantial space
advantage can be obtained by sorting dictionaries.

Iterating through all n entries of a mapping, once, in sorted order,
is O(n) time and O(1) space with an unsorted hash table, a hash table
with a sorted list of the keys and all  types of tree that I know of.
If there is a performance gain, it must come from amortizing
insertions, deletions and index-building. (The other operation, value
updates for an existing key, doesn't matter: updates cause no
structural changes and they must not invalidate any iterator.)

Let's consider a very simple use case: n insertions followed by x
iterations through all entries and n*y lookups by key.

Cost for a hashtable and an ad hoc sorted list of the keys,
fundamentally equivalent to sorting a Python dict:

O(n) for insertions
O(n log n) for indexing
O(nx) for iterations
O(ny) for lookups

Cost for a tree:

O(n log n) for insertions
no indexing
O(nx) for iterations
O(ny log n) for lookups

The hashtable comes out ahead because of cheaper lookups, for any x
and y; note that without lookups there is no reason to use a mapping
instead of a list of (key,value) tuples.

With an equal number k of insertions and deletions between the
iterations, the hashtable must be reindexed x times:

O(n) for insertions
O(kx) for updates and deletions
O(nx log n) for indexing and reindexing
O(nx) for iterations
O(ny) for lookups

The tree might be cheaper:

O(n log n) for insertions
O(kx log n) for updates and deletions
no indexing and reindexing
O(nx) for iterations
O(ny log n) for lookups

For a fixed small k, or with k proportional to n, reindexing the
hashtable and lookups in the tree are equally mediocre.

Maybe we could make k changes in the middle of each iteration. For a
naively reindexed hashtable:

O(n) for insertions
O(kx) for updates and deletions
O(knx log n) for indexing and reindexing
O(nx) for iterations
O(ny) for lookups

For a tree, the costs remain as above: the new factor of n for the
hashtable is fatal. Clever updates of the existing index or use of a
heap would lower the cost, but they would need to be encapsulated as a
sorteddict implementation.

Is this a practical use case? When are sequential visits of all
elements in order frequently suspended to make insertions and
deletions, with a need for efficient lookup by key?
- Priority queues; but given the peculiar pattern of insertions and
deletions there are more suitable specialized data structures.
- A* and similar best-first algorithms.
It's a small but important niche; maybe it isn't important enough for
the standard library. Other absent datatypes like heaps, an immutable
mapping type similar to frozenset and tuple, or disjoint sets with
would be more fundamental and general, and a mapping that remembers
the order of insertion regardless of keys would be equally useful.
In the Java collections framework all these kinds of mapping and
others coexist peacefully, but Python doesn't have the same kitchen
sink approach to basic libraries.

Regarding the API, a sorted dict should not expose random access by an
entry's position in the sequence: it is a gratuitous difficulty for
the implementor and, more importantly, a perversion of the mapping
data type. For that purpose there are lists and tuples, or explicit
indices like those of the Boost multi-index containers (http://
www.boost.org/libs/multi_index).
The only differences with dict should be the constraint that items(),
keys(), values(), iteritems(), iterkeys(), itervalues() return entries
sorted by key.

Regards,

Lorenzo Gatti



From jgodoy at gmail.com  Sat Sep  1 07:38:38 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sat, 01 Sep 2007 08:38:38 -0300
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<1188523589.736146.263510@l22g2000prc.googlegroups.com>
	<1i3o9kr.2gmni61g62moaN%aleax@mac.com>
	<7xwsvcc9yz.fsf@ruckus.brouhaha.com>
	<1i3p8lm.19738kn1q0gkouN%aleax@mac.com>
	<1188587846.687895.69240@q5g2000prf.googlegroups.com>
	<38rmq4-cq.ln1@strongwill.g2ctech>
	<46d903db$0$19580$4c368faf@roadrunner.com>
Message-ID: <gjvnq4-a45.ln1@strongwill.g2ctech>

Carl Banks wrote:

> This is starting to sound silly, people.  Critical is a relative term,
> and one project's critical may be anothers mundane.  Sure a flaw in your
> flagship product is a critical problem *for your company*, but are you
> really trying to say that the criticalness of a bad web search is even
> comparable to the most important systems on airplanes, nuclear reactors,
> dams, and so on?  Come on.

Who said they were the same?  I said that just because it doesn't take lives
it doesn't mean it isn't important.  I wasn't going to reply to not extend
this, but this misunderstanding of your was bugging me.

I use Python on systems that deal with human health and wrong calculations
may have severe impact on a good sized population.  Using Python.

As with nuclear reactors, dams, airplanes and so on we have a lot of
redundancy and a lot of checkpoints.  No one is crazy to take them out or
even to remove some kind of dispositive to allow manual intervention at
critical points.




From richardjones at optushome.com.au  Sat Sep  8 22:06:04 2007
From: richardjones at optushome.com.au (Richard Jones)
Date: Sun, 09 Sep 2007 12:06:04 +1000
Subject: include myVar
References: <mailman.290.1189303445.2658.python-list@python.org>
Message-ID: <46e3550c$0$22253$afc38c87@news.optusnet.com.au>

Ricardo Ar?oz wrote:
> Is there a way to import a module whose name is in a variable (read from
> a configuration file for example)?

pydoc __import__


    Richard



From bj_666 at gmx.net  Sat Sep  1 05:11:59 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 1 Sep 2007 09:11:59 GMT
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<1188523589.736146.263510@l22g2000prc.googlegroups.com>
	<1i3o9kr.2gmni61g62moaN%aleax@mac.com>
	<7xwsvcc9yz.fsf@ruckus.brouhaha.com>
	<1i3p8lm.19738kn1q0gkouN%aleax@mac.com>
	<1188587846.687895.69240@q5g2000prf.googlegroups.com>
	<38rmq4-cq.ln1@strongwill.g2ctech>
	<46d903db$0$19580$4c368faf@roadrunner.com>
	<mailman.264.1188636661.28954.python-list@python.org>
Message-ID: <5jsomvFu0saU1@mid.uni-berlin.de>

On Sat, 01 Sep 2007 10:34:08 +0200, Hendrik van Rooyen wrote:

> "Carl Banks" <pavl....mail.com> wrote:
> 
>> This is starting to sound silly, people.  Critical is a relative term, 
>> and one project's critical may be anothers mundane.  Sure a flaw in your 
>> flagship product is a critical problem *for your company*, but are you 
>> really trying to say that the criticalness of a bad web search is even 
>> comparable to the most important systems on airplanes, nuclear reactors, 
>> dams, and so on?  Come on.
> 
> This really intrigues me - how do you program a dam?  - and why is it
> critical?
> 
> Most dams just hold water back.

And some produce electricity.  And most if not all can regulate how many
water is let through.  If something goes wrong the valley behind the dam
gets flooded.  If this is controlled by a computer you have the need for
reliable software.

Ciao,
	Marc 'BlackJack' Rintsch


From llothar at web.de  Sun Sep  2 20:21:38 2007
From: llothar at web.de (llothar)
Date: Sun, 02 Sep 2007 17:21:38 -0700
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
Message-ID: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>

I'm afraid that the GIL is killing the usefullness of python for some
types of applications now where 4,8 oder 64 threads on a chip are here
or comming soon.

What is the status about that for the future of python?

I know that at the moment allmost nobody in the scripting world has
solved this problem, but it bites and it bites hard. Only groovy as a
Java Plugin has support but i never tried it. Writing an interpreter
that does MT this seems to be extremely difficult to do it right, with
lots of advanced stuff like CAS and lock free programming.

Even Smalltalk and Common Lisp didn't get it until know (with the
exception of certain experiments).



From bignose+hates-spam at benfinney.id.au  Tue Sep 18 19:14:15 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 19 Sep 2007 09:14:15 +1000
Subject: super() doesn't get superclass
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<87abrkhtfp.fsf@mulj.homelinux.net>
Message-ID: <871wcvzhvc.fsf@benfinney.id.au>

Hrvoje Niksic <hniksic at xemacs.org> writes:

> class X(Y):
>   def foo(self):
>     super(X, self).foo()
> 
> ...there is in fact no guarantee that super() calls a superclass of
> X.  However, it is certainly guaranteed that it will call a superclass
> of type(self).

Not even that. It could call *any class in the inheritance hierarchy*,
depending on how the MRO has resolved "next class". Even one that is
neither an ancestor nor a descendant of X.

-- 
 \     "When I was a kid I used to pray every night for a new bicycle. |
  `\    Then I realised that the Lord doesn't work that way so I stole |
_o__)                one and asked Him to forgive me."  -- Emo Philips |
Ben Finney


From buzzard at urubu.freeserve.co.uk  Thu Sep 20 10:45:24 2007
From: buzzard at urubu.freeserve.co.uk (Duncan Smith)
Date: Thu, 20 Sep 2007 15:45:24 +0100
Subject: writing to lists within a dictionary
In-Reply-To: <1190291825.337829.34670@19g2000hsx.googlegroups.com>
References: <1190291825.337829.34670@19g2000hsx.googlegroups.com>
Message-ID: <fcu13h$2ujt$1@energise.enta.net>

cokofreedom at gmail.com wrote:
> I am trying to write a basic anagram system, that takes a text file
> line by line and by sorting the string into its alphabetical form
> compares it to keys within a dictionary.
> 
> If it matches a key I want to add it (in its unordered form) to a list
> for that key.
> 
> So far this is what I have
> 
> import sys, string, fileinput
> 
> # takes an item (string) and converts it to its basic alphabetical
> form
> def getChar( item ):
> 	item_chars = []
> 	for i in range(len(item)):
> 		item_chars.append(item[i])
> 	item_chars.sort()
> 	return string.join(item_chars, "")
> 
> anagramDict = {}
> 
> for line in fileinput.input("fakelist.txt"):
> 	myLine = line.replace("\n", "") #remove the carriage returns
> 	myString = getChar(myLine) #get the alphabetical form
> 	for k in anagramDict.items(): #iterator through the keys in the
> dictionary
> 		if k[0] == myString: #if the key matches our string
> 			anagramDict[k].append([myLine])#append that k and add the value
> this line
> 	else:
> 		anagramDict[myString] = [myLine] #else there is no key the same so
> make a new one
> 
> print anagramDict
> 

A few suggestions.

Use string methods, rather than the string module.
Replace getChar with a simple one-liner (check out the builtin 'sorted'
function).
Consider whether it's really necessary to iterate over all the
dictionary keys.
Check out the setdefault method of dictionaries.

Duncan


From hat at se-162.se.wtb.tue.nl  Thu Sep 20 02:51:28 2007
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Thu, 20 Sep 2007 08:51:28 +0200
Subject: cannot create my own dict
References: <slrnff260r.43o.hat@se-162.se.wtb.tue.nl>
	<46f17c26$0$26298$426a74cc@news.free.fr>
Message-ID: <slrnff463g.536.hat@se-162.se.wtb.tue.nl>

On 2007-09-19, Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> wrote:
> A.T.Hofkamp a ?crit :
>> So if copying all methods of a native dictionary is not enough, what should I
>> do to make my class work as a dictionary WITHOUT deriving from dict (which will
>> obviously work).
>>

Hello all,

Thanks for all the suggestions, the cause of the problem seems to be that I
assumed that I can export magic methods from a member. Apparently, that is not
true :-(

> Sorry, I missed this last requirement. BTW, why don't you want to 
> subclass dict ?

The reason for this problem is that we are busy re-structuring a large Python
program, and we want to ensure nobody is messing up our data structures (at
least not until we are finished).
Most data types have a nice frozen variant (set -> frozenset, list -> tuple,
__setattr__ override), but dictionaries do not.

As a result I wanted to have a read-only dictionary.
There is one in the Cook book, but it uses property's that I don't understand
and they are also not in de Python language reference (at least I couldn't find
them in the index and not in the table of contents).
I don't like code that I don't understand (in particular when bugs in that code
will be nasty to debug), so I decided to write my own, not in the last place,
because I expected it to be simple in Python.
I can derive from dict, but the problem with that is that I start with a
read/write dictionary, and I can only hope to plug all holes to prevent my data
from leaking out.
By starting from 'object', I certainly don't have that problem, I start with a
closed bucket and punch holes in it in a controlled way.
(I rather have the program drop dead due to not having enough access than
have it continue with too much access causing havoc 500 statements later in a
totally unrelated area.)

Rather than write a bunch of code like

    def __contains__(self, val):
        return val in self.mydict

I thought I'd simply do

   self.__contains__ == self.d.__contains__

which is exactly the same but less work (or so I thought), and possibly
slightly faster.

Well, no such luck thus :-(


Tnx for clearing up the problem,
Albert


From dimitri.pater at gmail.com  Wed Sep  5 17:26:51 2007
From: dimitri.pater at gmail.com (dimitri pater)
Date: Wed, 5 Sep 2007 23:26:51 +0200
Subject: StringIO MySQL data blob Image problem
In-Reply-To: <e75321bd0709051214t23ab465do47bb75d2f9dae024@mail.gmail.com>
References: <e75321bd0709050553h5e3302f7lf59f10104895ff5d@mail.gmail.com>
	<46DEAAAB.8040008@timgolden.me.uk>
	<e75321bd0709051213h686122d0w63318b1f16d2b509@mail.gmail.com>
	<e75321bd0709051214t23ab465do47bb75d2f9dae024@mail.gmail.com>
Message-ID: <e75321bd0709051426o6a0499efn2ba4d58908101bca@mail.gmail.com>

Hi,
the following code works when inserting images in reportlab tables:

(result4 is a query result)
a=0
for i in result4:
           cfoto = StringIO()
           cfoto.write(result4[a][9].tostring())
           dfoto = cfoto.getvalue()
           fileFoto = open(str(a)+'temp.jpg','wb')
           fileFoto.write(dfoto)
           fileFoto.close()
           foto = Image(str(a)+'temp.jpg')
           a+=1

          Do stuff here (insert the Image)

The problem with this code is that I need to create a unique file
(str(a)+'temp.jpg'), I tried to use a single temp.jpg but it kept
using the data from the first record. Tried flush(), truncate(0), but
it didn't work. (My mistake probably ;-)
But the images show in the PDF so that's fine for now.

On 9/5/07, dimitri pater <dimitri.pater at gmail.com> wrote:
> ---------- Forwarded message ----------
> From: dimitri pater <dimitri.pater at gmail.com>
> Date: Sep 5, 2007 9:13 PM
> Subject: Re: StringIO MySQL data blob Image problem
> To: Tim Golden <mail at timgolden.me.uk>
>
>
> > Well, I'm mystified. Not by your results: that exactly what I
> > expected to get, but because you're doing everything *except*
> > manipulating an image and putting it into a PDF via ReportLab.
> >
> Dear Tim,
> you are right of course, I have been trying to put the StringIO in a temp file:
> cfoto=StringIO
> cfoto.write(result[0][1].tostring())
> dfoto=cfoto.getvalue()
> fileFoto=open('temp.jpg','wb')
> fileFoto.write(dfoto)
>
> and indeed, the blob from MySQL is saved as an image!
> however,
> foto= Image('temp.jpg')
> and inserting foto into a table results in:
> x = struct.unpack('B', image.read(1))
> error: unpack str size does not match format
> oh, well... still needs some work
> BTW: I used 'local' images before (I mean they did not originate from
> a DB), that worked well in Reportlab's tables.
> Thanks, I am getting there (I think)
>
>
> --
> ---
> You can't have everything. Where would you put it? -- Steven Wright
> ---
> please visit www.serpia.org
>


-- 
---
You can't have everything. Where would you put it? -- Steven Wright
---
please visit www.serpia.org


From steve at holdenweb.com  Wed Sep 26 11:17:33 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 26 Sep 2007 11:17:33 -0400
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <1190814263.104358.158090@n39g2000hsh.googlegroups.com>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>	<1190719164.587009.206340@19g2000hsx.googlegroups.com>	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>	<1190744523.025029.227690@k79g2000hse.googlegroups.com>	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>	<1190753722.026806.254530@d55g2000hsg.googlegroups.com>	<1190756003.292096.71130@o80g2000hse.googlegroups.com>	<1190789981.385466.37870@57g2000hsv.googlegroups.com>	<Xns99B760A3F5859duncanbooth@127.0.0.1>	<87sl51lshd.fsf@mulj.homelinux.net>	<1190799759.367001.106400@r29g2000hsg.googlegroups.com>	<87fy11lo22.fsf@mulj.homelinux.net>	<1190804538.469582.96950@22g2000hsm.googlegroups.com>	<slrnffkjoa.hc2.apardon@rcpc42.vub.ac.be>
	<1190814263.104358.158090@n39g2000hsh.googlegroups.com>
Message-ID: <fddt6b$lf9$1@sea.gmane.org>

Mark Summerfield wrote:
> On 26 Sep, 13:22, Antoon Pardon <apar... at forel.vub.ac.be> wrote:
[...]
>> So it seems the API needs some more sorting out.
> 
> I think you missed some of the previous postings.
> 
> The sorteddict API that has emerged so far is (1) apart from the
> constructor, everything is identical to dict, (2) the constructor
> takes the same args as sorted(), so if you want to seed with a dict or
> with keywords you write sorteddict(dict(a=1,b=2), ...), (or you could
> create a sorteddict and use update() since that takes the same args as
> dict's constructor).
> 
> Could your AVLTree support cmp and keys and reverse?
> 
I don't see how you can guarantee ordering of the seeded components, 
since you are creating an inherently unpredictable dict as the component 
to specify the initial contents of the sorteddict.

Or is an arbitrary initial ordering acceptable?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From tim.arnold at sas.com  Mon Sep 24 12:38:32 2007
From: tim.arnold at sas.com (Tim Arnold)
Date: Mon, 24 Sep 2007 12:38:32 -0400
Subject: elementtree question
References: <fd0lmi$pm8$1@foggy.unx.sas.com> <46F76F86.6010307@web.de>
Message-ID: <fd8p68$bf5$1@foggy.unx.sas.com>

Thanks for the great answers--I learned a lot. I'm looking forward to the ET 
1.3 version.  I'm currently working on some older HP10.20ux machines and 
haven't been able to compile lxml all the way through yet.

thanks again,
--Tim Arnold




From daniel.j.larsson at gmail.com  Thu Sep  6 14:42:43 2007
From: daniel.j.larsson at gmail.com (Daniel Larsson)
Date: Thu, 6 Sep 2007 20:42:43 +0200
Subject: library to launch program in linux
In-Reply-To: <1189103678.484278.321650@r34g2000hsd.googlegroups.com>
References: <1189103678.484278.321650@r34g2000hsd.googlegroups.com>
Message-ID: <2bfa72fa0709061142j65cad924ybce436701dd64bd1@mail.gmail.com>

On 9/6/07, idzwan.nizam at gmail.com <idzwan.nizam at gmail.com> wrote:
>
> Hi there,
>
> I'm a new user. What library should I use so that I can launch program
> in linux using python? Thank you in advance.


os.system or the commands library.

--
> http://mail.python.org/mailman/listinfo/python-list
>
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From jergosh at wp.pl  Thu Sep  6 05:50:37 2007
From: jergosh at wp.pl (=?UTF-8?B?R3J6ZWdvcnogU8WCb2Rrb3dpY3o=?=)
Date: Thu, 06 Sep 2007 11:50:37 +0200
Subject: So what exactly is a complex number?
In-Reply-To: <5k86hqF2if1hU1@mid.individual.net>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>	<mailman.212.1188576194.28954.python-list@python.org>	<451mq4-les.ln1@ozzie.tundraware.com>	<mailman.266.1188644067.28954.python-list@python.org>	<lbjpq4-eo22.ln1@ozzie.tundraware.com>	<mailman.310.1188805355.28954.python-list@python.org>
	<5k86hqF2if1hU1@mid.individual.net>
Message-ID: <46DFCD6D.2070002@wp.pl>

 >> In fact, a proper vector in physics has 4 features: point of
>> application, magnitude, direction and sense.
>>     
>
> No -- a vector has the properties "magnitude" and direction.
> Although not everything that has magnitude and direction is a
> vector.
>
> It's very unusual to have a fixed point of application as a vector's
> property (at least I haven't seen it so far). That would complicate
> equality tests.
>   
Interesting. It appears that we are ran into a mathematical cultural 
difference. Were I come from vectors *are* defined as having four 
properties that I enumerated. After some research I found that English 
sources (Wikipedia) indeed give the definition you supplied. In my old 
mechanics textbook (which is in English) vectors are divided into 
'fixed' (having a clearly defined point of application), 'sliding' 
(p.o.a. can be moved along a line) and 'free' (those not associated with 
a unique line in space).

However, given the following problem: (assuming 2-d Cartesian coordinate 
system and gravity acting 'downwards') "There are 3 point masses: 2 kg 
at (0, 0), 1 kg at (5, 4) and 4 kg at (2, 2). The acting forces are 
given as vectors: [2, 2] [1, 1]. Find the trajectories of all point 
masses." how would you propose to solve it without knowing where the 
forces are applied?
>> In case of a vector in two dimensions (a special case, which you
>> also fail to stress not to mention that you were talking about
>> space) the magnitude and sense can be described by one number     
>
> Actually, the "magnitude" and "sense" you use here are redundant.
> What's the difference between a vector with magnitude "1" and
> sense "-", and magnitude "-1" and sense "+"?
>   
Again, I think we were given different definitions. Mine states that 
direction is 'the line on which the vector lies', sense is the 'arrow' 
and magnitude is the 'length' (thus non-negative). The definition is 
separate from mathematical description (which can be '[1 1] applied at 
(0, 0)' or 'sqrt(2) at 45 deg applied at (0, 0)' or any other that is 
unambiguous).
>> and the direction as another.
>>     
>
> Represent the direction as one number? Only in a one-dimensional
> space.
>   
No. In one-dimensional 'space' direction is a ? quantity (a 'sense'). In 
2-d it can be given as an angle.

Regards,
Greg



From jstroud at mbi.ucla.edu  Thu Sep 27 20:54:30 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 27 Sep 2007 17:54:30 -0700
Subject: Python 3.0 migration plans?
In-Reply-To: <mailman.1195.1190936289.2658.python-list@python.org>
References: <mailman.1195.1190936289.2658.python-list@python.org>
Message-ID: <fdhja4$qdk$1@daisy.noc.ucla.edu>

Steve Holden wrote:
> I wondered if a straw poll could get some idea of readers' thoughts 
> about when they will be migrating to 3.0 on, so I used the new widget on 
> Blogger to add a poll for that.
> 
> I'd appreciate if if you would go to
> 
>   http://holdenweb.blogspot.com/
> 
> and register your vote on your intended migration timescale.
> 
> Thanks!

I'm going to abstain voting until 'public beta + about 1 year' is a choice.

James


From carsten at uniqsys.com  Wed Sep 12 18:56:28 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Wed, 12 Sep 2007 18:56:28 -0400
Subject: Error in random module, bad installation?
In-Reply-To: <1189635238.655642.233240@g4g2000hsf.googlegroups.com>
References: <1189635238.655642.233240@g4g2000hsf.googlegroups.com>
Message-ID: <1189637788.3301.3.camel@localhost.localdomain>

On Wed, 2007-09-12 at 15:13 -0700, Andrew F wrote:
> >>> import random
> Unexpected error: <type 'exceptions.TypeError'>
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "random.py", line 10, in <module>
>     x = random.random()
> TypeError: 'module' object is not callable

You have a file called random.py in your current directory. It's
shadowing the random module from the library.

HTH,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From bjorn.kempen at gmail.com  Sat Sep 15 18:02:52 2007
From: bjorn.kempen at gmail.com (buffi)
Date: Sat, 15 Sep 2007 22:02:52 -0000
Subject: Python statements not forcing whitespace is messy?
In-Reply-To: <mailman.594.1189893054.2658.python-list@python.org>
References: <1189884110.006272.240840@50g2000hsm.googlegroups.com>
	<mailman.589.1189887114.2658.python-list@python.org>
	<1189890755.870694.29790@r29g2000hsg.googlegroups.com>
	<mailman.594.1189893054.2658.python-list@python.org>
Message-ID: <1189893772.157240.178800@19g2000hsx.googlegroups.com>

On Sep 15, 11:49 pm, Steve Holden <st... at holdenweb.com> wrote:
> buffi wrote:
> > On Sep 15, 10:11 pm, "J. Cliff Dyer" <j... at sdf.lonestar.org> wrote:
> >> buffi wrote:
> >>> Am I the only one that thinks that python statements should force
> >>> whitespace before and after them?
> >>> Right now this is not enforced and for an example these statements are
> >>> valid
> >>> print"hello"
> >>> "foo"if"bar"else"foobar"
> >>> for(x,y)in[(1,2),(3,4)]:print(x,y)
> >>> [(y)for(x,y)in[("foo",2),("bar",4)]if"foo"in(x)]
> >>> ...and so on.
> >> On the other hand, this is just as bad:
>
> >> [ ( y ) for ( x , y ) in [ ( "foo" , 2 ) , ( "bar" , 4 ) ] if "foo" in (
> >> x ) ]
>
> >> And I'd hate to have to remember all of the rules for what can go
> >> together and what can't, especially when it comes time to debug.  No.
> >> I don't think it should be forced, but maybe put it in PEP8 or PEP3008.
>
> >> Also, the only thing I find thoroughly disagreeable in all of that
> >> mess, is the run-ins involving " characters.  The rest are at least
> >> clear at a glance what belongs where.
>
> >> Also, would you require the following?
>
> >> my_function (swallow='European')
>
> >> Because that is just an awful use of whitespace.
>
> >> Cheers,
> >> Cliff
>
> > I believe that having whitespace around the builtin statements, and
> > having whitespace around everything is pretty different.
>
> > There would be no downside whatsoever to enforcing this, except for
> > backwards incompatibility (which is a rather huge downside but well...
> > py3k is gonna break everything anyways). There obviously shouldnt be
> > any limit to the maximum amount of whitespace used around statements
> > (due to formatting and so on), but allowing stuff like print"hello" is
> > just horrible.
>
> If you don't like it then don't write it. I've been reading this group
> on and off for about ten years and I believe your email is the first to
> point out that this is possible. Clearly it isn't something that happens
> a lot, and I don't know why you have a bug up your ass about it, as the
> Americans say.
>
> The Python philosophy is to be permissive, and to expect individual
> users to write readable Python. Since they obviously do (one message in
> ten years providing a counter-example) I think you are wasting your time
> and energy on this.
>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
>
> Sorry, the dog ate my .sigline

I actually found out about this myself while grading student labs. I
myself didn't even know that you could write statements like this
until then, but since some students does it that means that there
should be other people out there as well that does it.

And I can't say that I agree about "The Python philosophy being
permissive, and to expect individual users to write readable Python".
Python enforces proper indentation which I think is a great idea since
I'm used to reading horribly indented code by others. I would love to
see this extended to enforce proper whitespacing for statements.

"There should be one-and preferably only one-obvious way to do it." is
a phrase that is usually considered pythonic, and I think that it
should also apply a bit when it comes to coding conventions.

- Bj?rn Kemp?n



From zzbbaadd at aol.com  Mon Sep  3 23:02:46 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Mon, 03 Sep 2007 20:02:46 -0700
Subject: Python is overtaking Perl
In-Reply-To: <20070904024908.b8aca60c.sulsa@gazeta.pl>
References: <1188865943.238573.218750@w3g2000hsg.googlegroups.com>
	<20070904024908.b8aca60c.sulsa@gazeta.pl>
Message-ID: <1188874966.963370.223660@r34g2000hsd.googlegroups.com>


> This chart is showing that amount of python programers is smaller every
> year :(

I saw an article maybe a year ago, regarding "best careers" that
completely contradicted previous articles I had seen in years gone by.
It said that the number of people in programming and related jobs
would decline in future decades.




From roy at panix.com  Sat Sep  1 00:06:13 2007
From: roy at panix.com (Roy Smith)
Date: Sat, 01 Sep 2007 00:06:13 -0400
Subject: So what exactly is a complex number?
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
	<mailman.212.1188576194.28954.python-list@python.org>
	<451mq4-les.ln1@ozzie.tundraware.com>
	<46d89ba9$0$30380$9b4e6d93@newsspool4.arcor-online.net>
	<fbamkq$r7q$5@lust.ihug.co.nz>
Message-ID: <roy-4D87D2.00061301092007@news.panix.com>

In article <fbamkq$r7q$5 at lust.ihug.co.nz>,
 Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> wrote:

> In message <46d89ba9$0$30380$9b4e6d93 at newsspool4.arcor-online.net>, Wildemar
> Wildenburger wrote:
> 
> > Tim Daneliuk wrote:
> >> 
> >> One of the most common uses for Complex Numbers is in what are
> >> called "vectors".  In a vector, you have both an amount and
> >> a *direction*.  For example, I can say, "I threw 23 apples in the air
> >> at a 45 degree angle".  Complex Numbers let us encode both
> >> the magnitude (23) and the direction (45 degrees) as a "number".
> >> 
> > 1. Thats the most creative use for complex numbers I've ever seen. Or
> > put differently: That's not what you would normally use complex numbers
> > for.
> 
> But that's how they're used in AC circuit theory, as a common example.

Well, not really.  They're often talked about as vectors, when people are 
being sloppy, but they really aren't.

In the physical world, let's say I take out a compass, mark off a bearing 
of 045 (north-east), and walk in that direction at a speed of 5 MPH.  
That's a vector.  The "north" and "east" components of the vector are both 
measuring fundamentally identical quantities, along perpendicular axes.  I 
could pick any arbitrary direction to call 0 (magnetic north, true north, 
grid north, or for those into air navigation, the 000 VOR radial) and all 
that happens is I have to rotate my map.

But, if I talk about complex impedance in an AC circuit, I'm measuring two 
fundamentally different things; resistance and reactance.  One of these 
consumes power, the other doesn't.  There is a real, physical, difference 
between these two things.  When I talk about having a pole in the left-hand 
plane, it's critical that I'm talking about negative values for the real 
component.  I can't just pick a different set of axis for my complex plane 
and expect things to still make sense.


From bdesth.quelquechose at free.quelquepart.fr  Wed Sep 19 15:43:59 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 19 Sep 2007 21:43:59 +0200
Subject: cannot create my own dict
In-Reply-To: <slrnff260r.43o.hat@se-162.se.wtb.tue.nl>
References: <slrnff260r.43o.hat@se-162.se.wtb.tue.nl>
Message-ID: <46f17c26$0$26298$426a74cc@news.free.fr>

A.T.Hofkamp a ?crit :
> Hello all,
> 
> This morning I tried to create my own read-only dictionary, and failed
> miserably.
> I don't understand why, can somebody enlighten me?
> 
(snip)

> So if copying all methods of a native dictionary is not enough, what should I
> do to make my class work as a dictionary WITHOUT deriving from dict (which will
> obviously work).
> 

Sorry, I missed this last requirement. BTW, why don't you want to 
subclass dict ?

Anyway, something like the following should do the trick
(NB : Q&D, needs at least some testing):

class ReadOnlyDict(object):
     def __init__(self, *args, **kw):
         self._dict = dict(*args, **kw)

     def __getattr__(self, name):
         if name in ('__setitem__', 'setdefault'):
             raise AttributeError("%s is read-only" % \
                                   self.__class__.__name__)
         return getattr(self._dict, name)

     for name in dir(dict):
         if name.startswith('__') \
         and name not in ('__new__', '__init__',
                          '__setitem__', '__class__', '__dict__'):
             exec("%s = dict.%s" % (name, name))






From tuomas.vesterinen at pp.inet.fi  Wed Sep 12 17:25:27 2007
From: tuomas.vesterinen at pp.inet.fi (Tuomas)
Date: Wed, 12 Sep 2007 21:25:27 GMT
Subject: An ordered dictionary for the Python library?
In-Reply-To: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
Message-ID: <46E85979.4060905@pp.inet.fi>

Mark Summerfield wrote:
> I feel that Python lacks one useful data structure: an ordered
> dictionary.

Why it should be a dict. With it you can only maintain the order 
x1<x2<x3... But by definition the order only requires x1<=x2<=x3... 
There are many use cases where keys are not unique. I'd prefer a list 
implementation, which would maintain the user defined order (cmp, key). 
So you could map your objects with any order.

TV


From whamil1 at entergy.com  Tue Sep 25 14:43:45 2007
From: whamil1 at entergy.com (Hamilton, William )
Date: Tue, 25 Sep 2007 13:43:45 -0500
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <1190744523.025029.227690@k79g2000hse.googlegroups.com>
Message-ID: <588D53831C701746A2DF46E365C018CE01D2CB52@LITEXETSP001.etrsouth.corp.entergy.com>

> From: Paul Hankin
> 
> 
> Here's a first go. Sorting occurs when the keys are iterated over,
> making it fast (almost as a dict) for construction, insertion, and
> deletion, but slow if you're iterating a lot. You should look at some
> use cases to decide if this approach is best, or if a sorted
> datastructure should be used instead, but my instinct is that this is
> a decent approach. Certainly, you're unlikely to get a simpler
> implementation :)
> 
> class sorteddict(dict):
>     "A sorted dictionary"
>     def __init__(self, arg=None, cmp=None, key=None, reverse=False):
>         if arg:
>             super(sorteddict, self).__init__(arg)
>         else:
>             super(sorteddict, self).__init__()
>         self._cmp = cmp
>         self._key = key
>         self._reverse = reverse
>     def keys(self):
>         return sorted(super(sorteddict, self).keys(), cmp=self._cmp,
>             key=self._key, reverse=self._reverse)
>     def iter_keys(self):
>         return (s for s in self.keys())
>     def items(self):
>         return [(key, self[key]) for key in self.keys()]
>     def iter_items(self):
>         return ((key, self[key]) for key in self.keys())
>     def values(self):
>         return [self[key] for key in self.keys()]
>     def iter_values(self):
>         return (self[key] for key in self.keys())
>     def __str__(self):
>         return '{' + ', '.join('%s: %s' % (repr(k), repr(v))
>             for k, v in self.iter_items()) + '}'
>     def __repr__(self):
>         return str(self)
>     def __iter__(self):
>         return self.iter_keys()


You could speed up keys() at the cost of memory if you maintained a list
of keys in the instance.  Doing so would let you use an "unsorted" flag
that gets set when a new key is added and checked when keys() is called.
If the flag is unset, just return a copy of the list.  Otherwise, sort
the list in place, return a copy, and unset the flag.  (Copies because
you don't want the master key list to be modified by code using the
class.)

The use case for this seems to be when you have a dictionary that you
need to often work through in sorted order.  Sorting the keys every time
keys() is called isn't an improvement over using a regular dict and
sorting the keys normally.  So the extra memory cost of maintaining an
internal keys list looks reasonable to me.



--
-Bill Hamilton


From mensanator at aol.com  Mon Sep 10 01:57:24 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: Sun, 09 Sep 2007 22:57:24 -0700
Subject: Modul (%) in python not like in C?
In-Reply-To: <13e9iqhmgofasfb@corp.supernews.com>
References: <mailman.294.1189364475.2658.python-list@python.org>
	<TM0Fi.4172$FO2.18@newssvr14.news.prodigy.net>
	<13e9iqhmgofasfb@corp.supernews.com>
Message-ID: <1189403844.128637.85950@k79g2000hse.googlegroups.com>

On Sep 9, 11:43?pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Mon, 10 Sep 2007 01:06:59 GMT, Bryan Olson <fakeaddr... at nowhere.org>
> declaimed the following in comp.lang.python:
>
> > They also disagree about integer division. C rounds toward zero;
> > Python rounds downward.
>
> > In C:       -111 / 10  evaluates to -11
> > In Python:  -111 / 10  evaluates to -12
>
> > > Is this a known gotcha? I tried to google the
> > > subject however one cannot google the symbol %.
>
> > I think it's a known gotcha. I cited the refs in another post.
>
>         The best answer is probably to be found from the definition of
> divmod()
>
>
>
> >>> divmod(70, 6)
> (11, 4)
> >>> 6*11 + 4
> 70
> >>> divmod(-70, 6)
> (-12, 2)
> >>> 6 * -12 + 2
> -70
>
> Or in general terms
>
> (a, b) = divmod(x, y)
> x = y * a + b

But, in general, doesn't (-11,-4) also satisfy
  x = y *   a +   b
-70 = 6 * -11 + (-4)?

Do you overpay your car loans and wait for a refund?

Or do you make your last payment the residue of the
debt after making 47 (or whatever) equal payments?


>
> IOWs, the definition of modulo, and the definition of integer division,
> are linked...
>
> --
>         Wulfraed        Dennis Lee Bieber               KD6MOG
>         wlfr... at ix.netcom.com             wulfr... at bestiaria.com
>                 HTTP://wlfraed.home.netcom.com/
>         (Bestiaria Support Staff:               web-a... at bestiaria.com)
>                 HTTP://www.bestiaria.com/




From gtcopeland at gmail.com  Sat Sep  1 09:25:59 2007
From: gtcopeland at gmail.com (Greg Copeland)
Date: Sat, 01 Sep 2007 06:25:59 -0700
Subject: Shed Skin Python-to-C++ compiler 0.0.23
In-Reply-To: <1187794819.745225.240130@j4g2000prf.googlegroups.com>
References: <mailman.3.1187613108.26576.python-list@python.org>
	<1187725658.819624.309370@r34g2000hsd.googlegroups.com>
	<1187794819.745225.240130@j4g2000prf.googlegroups.com>
Message-ID: <1188653159.558070.120270@19g2000hsx.googlegroups.com>

On Aug 22, 10:00 am, srepmub <mark.duf... at gmail.com> wrote:
> > Adding socket support would certainly open the door for many common
> > classes applications.  If I had my pick, I say, sockets and then re.
>
> Thanks. Especially sockets should be not too hard to add, but I
> probably won't work on these directly myself. Let me know if you are
> interested.. :-)
>
> > BTW, I gatta say projects like shedskin and pypy are the most exciting
> > python projects I'm aware of.  Please keep of the good work.  I'm so
> > excited about the day I can begin using shedskin for the types of
> > projects I use python on.
>
> I'm practically working alone on Shedskin, so the better bet will be
> PyPy, unless I start getting more help.
>
> BTW I usually add a link to the homepage, but somehow I forgot this
> time:
>
> http://mark.dufour.googlepages.com
>
> Thanks!
> Mark Dufour.


Mark, I wish I had the time to help with your project.  I believe
PyPy, Shedskin, and pyvm (which might be dead now), are the most
interesting python projects currently going on.  In fact, I would
place them ahead of python 3000 even.

Greg



From goodger at python.org  Mon Sep 10 19:13:47 2007
From: goodger at python.org (David Goodger)
Date: Mon, 10 Sep 2007 19:13:47 -0400
Subject: Next PyCon Organizers' Meeting Tuesday, 11 September
Message-ID: <46E5CFAB.8090802@python.org>

Next meeting: Tuesday, September 11, at 18:00 UTC (2PM Eastern, 1PM Central,
12PM Mountain, 11AM Pacific).

I'll post some agenda items, but feel free to add more:
http://wiki.python.org/moin/PyCon2008/OrganizersMeetings

Connection details:
http://wiki.python.org/moin/PyCon2008/OrganizersMeetingsConnectionDetails

PyCon is a community conference.  Please join in and help out!

David Goodger
PyCon 2008 Chair


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From joel.hedlund at gmail.com  Tue Sep 25 07:08:07 2007
From: joel.hedlund at gmail.com (Joel Hedlund)
Date: Tue, 25 Sep 2007 13:08:07 +0200
Subject: What is a good way of having several versions of a python module
	installed in parallell?
Message-ID: <fdai0b$7iv$1@news.lysator.liu.se>

Hi!

I write, use and reuse a lot of small python programs for variuos purposes in my work. These use a growing number of utility modules that I'm continuously developing and adding to as new functionality is needed. Sometimes I discover earlier design mistakes in these modules, and rather than keeping old garbage I often rewrite the parts that are unsatisfactory. This often breaks backwards compatibility, and since I don't feel like updating all the code that relies on the old (functional but flawed) modules, I'm left with a hack library that depends on halting versions of my utility modules. The way I do it now is that I update the programs as needed when I need them, but this approach makes me feel a bit queasy. It seems to me like I'm thinking about this in the wrong way.

Does anyone else recognize this situation in general? How do you handle it? 

I have a feeling it should be possible to have multiple versions of the modules installed simultaneously, and maybe do something like this: 

mymodule/
+ mymodule-1.1.3/
+ mymodule-1.1.0/
+ mymodule-0.9.5/
- __init__.py

and having some kind of magic in __init__.py that let's the programmer choose version after import:

import mymodule
mymodule.require_version("1.1.3")

Is this a good way of thinking about it? What would be an efficient way of implementing it?

Cheers!
/Joel Hedlund


From exhuma at gmail.com  Thu Sep  6 12:12:56 2007
From: exhuma at gmail.com (exhuma.twn)
Date: Thu, 06 Sep 2007 09:12:56 -0700
Subject: Changing data in an QAbstractListModel
Message-ID: <1189095176.973314.227720@r29g2000hsg.googlegroups.com>

Hi, I want to create a very simple read-only ListView. As the same
data is used on various places in the UI, I decided to create a new
ListView with a new Model instead of using the QListWidget.

So far, the data displays correctly after setting it with "setModel"
on the ListView. But how do I tell the views that the data is updated
in the model?

I defined a simple "update" method in the model which I call on
certain events to fetch the new data in the DB. I tried to "emit" the
"dataChanged()" signal of the Model without success. I don't know
where I should get the two required "index" parameters from.

Any hints?

Here's the model:
#--------------------------------------------------
class UnitListModel(QtCore.QAbstractListModel):

   __units = []

   def update(self):
      c = db_con.cursor()
      # SELECT only the most recent entry for each company
      c.execute("SELECT DISTINCT ON (unit_id) nom FROM unit ORDER BY
unit_id, year DESC")
      for unit in c.fetchall():
         self.__units.append( unit[0] )
      c.close()

   def rowCount(self, parent = QtCore.QModelIndex()):
      return len(self.__units)

   def data(self, index, role):
      if not index.isValid():
         return QtCore.QVariant()

      if index.row() >= len(self.__units):
         return QtCore.QVariant()

      if role == QtCore.Qt.DisplayRole:
         return QtCore.QVariant(self.__units[index.row()])
      else:
         return QtCore.QVariant()
#--------------------------------------------------



From orsenthil at gmail.com  Wed Sep  5 22:40:41 2007
From: orsenthil at gmail.com (O.R.Senthil Kumaran)
Date: Thu, 6 Sep 2007 08:10:41 +0530
Subject: ??????urllib post????????????
In-Reply-To: <1188993813.330662.174660@w3g2000hsg.googlegroups.com>
References: <1188993813.330662.174660@w3g2000hsg.googlegroups.com>
Message-ID: <20070906024041.GA6599@gmail.com>

If possible, please post your query in ASCII.

-- 
Senthil


* liangxuliang79 at gmail.com <liangxuliang79 at gmail.com> [2007-09-05 05:03:33]:

> ????www.mmmppp333.com??????????http://ishare.iask.sina.com.cn/cgi-bin/
> fileid.cgi?fileid=844050
> ??????post fileid=844050????????
> 
> ????post????????????fileid=844050??????server??????????header??header????local????location????
> ??????????????????????????????????????????????mp3????????????????????????????local????????????mp3??????????????????????????????????
> ??????????????????????????????
> 
> ??????????????python??urllib????????urllib???????????????????????local????????????????local????????mp3????????
> ????????????????mp3.??
> 
> ??post????????/download.php?? post????????fileid=844050????????????????????????????????????????????????????
> ????????????????????web??????????????????????
> -- 
> http://mail.python.org/mailman/listinfo/python-list
-- 
O.R.Senthil Kumaran
http://uthcode.sarovar.org


From fredrik at pythonware.com  Wed Sep 26 07:52:24 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 26 Sep 2007 13:52:24 +0200
Subject: elementtree question
In-Reply-To: <fd0lmi$pm8$1@foggy.unx.sas.com>
References: <fd0lmi$pm8$1@foggy.unx.sas.com>
Message-ID: <fddh5r$94s$1@sea.gmane.org>

Tim Arnold wrote:


> I figure there must be a way to do it by creating a 'div' SubElement to the 
> 'body' tag and somehow copying the rest of the tree under that SubElement, 
> but it's beyond my comprehension.
> 
> How can I accomplish this?
> (I know I could put the class on the body tag itself, but that won't satisfy 
> the powers-that-be).

for completeness, here's an efficient and fairly straightforward way to 
do it under plain 2.5 xml.etree:

body = doc.find(".//body")

# clone and mutate the body element
div = copy.copy(body)
div.tag = "div"
div.set("class", "remapped")

# replace the body contents with the new div
body.clear()
body[:] = [div]

</F>



From http  Sat Sep 22 02:56:58 2007
From: http (Paul Rubin)
Date: 21 Sep 2007 23:56:58 -0700
Subject: Would Anonymous Functions Help in Learning Programming/Python?
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<1190413322.962737.53900@r29g2000hsg.googlegroups.com>
	<1190414192.636397.146450@57g2000hsv.googlegroups.com>
	<1190443748.907702.154660@22g2000hsm.googlegroups.com>
Message-ID: <7xlkazgpc5.fsf@ruckus.brouhaha.com>

Kay Schluehr <kay.schluehr at gmx.net> writes:
> If you feel you can transform it into another unambigous grammar
> mixing statements and expressions it's up to you.

We got rid of the print statement for python 3.0.  Why not get rid
of the rest of them too?  Just use expressions for everything, as
works fine for plenty of other languages.  


From duncan.booth at invalid.invalid  Wed Sep 26 16:52:17 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 26 Sep 2007 20:52:17 GMT
Subject: sorteddict PEP proposal [started off as orderedict]
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>
	<1190753722.026806.254530@d55g2000hsg.googlegroups.com>
	<1190756003.292096.71130@o80g2000hse.googlegroups.com>
	<1190789981.385466.37870@57g2000hsv.googlegroups.com>
	<Xns99B760A3F5859duncanbooth@127.0.0.1>
	<1190805297.182232.116830@50g2000hsm.googlegroups.com>
	<Xns99B7957CCE43Fduncanbooth@127.0.0.1>
	<1190815180.945099.248670@n39g2000hsh.googlegroups.com>
	<1190816657.574437.80980@g4g2000hsf.googlegroups.com>
	<1190820026.299569.110250@n39g2000hsh.googlegroups.com>
Message-ID: <Xns99B7DE66C56F6duncanbooth@127.0.0.1>

Paul Hankin <paul.hankin at gmail.com> wrote:

>> So should Duncan's
>>
>>     def __removekey(self, key):
>>         if key in self.__addkeys:
>>             del self.__addkeys[key]
>>         else:
>>             self.__delkeys.add(key)
>>
>> be changed to:
>>
>>     def __removekey(self, key):
>>         if key in self.__addkeys:
>>             del self.__addkeys[key]
>>         self.__delkeys.add(key)
> 
> Yes, and the same in __addkey: if it's in __delkeys it should be
> removed from there, and added to __addkeys. There's an invariant: any
> key is in at most one of __addkeys and __delkeys.
> 

No, don't do that. The code was fine as I had written it, except for the
minor point that sets don't support 'del'! Also there need to be some tests 
which actually exercise those two branches of the code: once you add 
appropriate tests it will become obvious that you really do need the else.

A key which is in dict must be either in __keycache or in __addkeys, but 
never in both.

A key which is not in the dict is either in none of __keycache, __addkeys, 
and __delkeys, or it is in both __keycache and __delkeys.

If you don't have the else in both __removekey and __addkey, then deleting 
a key leaves the key present in both __keycache and __delkeys (as it 
should), and re-adding the key then leaves it in both __keycache and 
__addkeys which breaks the first condition and means iterating will see 
the key twice. Alternatively adding a key not in the dictionary and then 
deleting it leaves it only in __delkeys, which isn't as serious. Actually 
maybe you only need it in __addkey, or maybe I still don't have enough 
tests.

Here's the code with set removal fixed and the extra test added: try 
removing the else from __addkey and you'll find it gives repeated indexes 
on iteration.

However, what we really need now is some code which actually uses both 
versions of sorteddict, and an ordinary dict sorted when needed, and 
demonstrates a real benefit from one or both sorteddict over the ordinary 
dict. I think my version should be faster, but it is more complicated and 
often in Python the fastest way is also the simplest.

------------- sorteddict.py -----------------------
#!/usr/bin/env python
# Copyright (c) 2007 Qtrac Ltd. All rights reserved.
# This module is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or (at
# your option) any later version.
# The API and implementation are based on ideas from Paul Hankin writing
# on comp.lang.python.

"""
A dictionary that is sorted by key or by the given cmp or key function.

Provides a dictionary with the same methods and behavior as a standard
dict and that can be used as a drop-in replacement for a dict (apart
from the constructor), but which always returns iterators and lists
(whether of keys or values) in sorted order. It does not matter when
items are inserted or when removed, the items in the sorteddict are
always returned in sorted order. The ordering is implicitly based on the
key's __lt__() (or failing that __cmp__()) method if no cmp or key
function is given.

The main benefit of sorteddicts is that you never have to explicitly
sort.

One use case is where you have a set of objects that you want to make
available in various sorted orders. You could, of course, sort on demand,
but if the number of objects is very large (and if you're prepared to
sacrifice some memory), it may be faster to use a sorteddict. For
example:

>>> class PrimeMinister:
...    def __init__(self, forename, surname, elected):
...        self.forename = forename
...        self.surname = surname
...        self.elected = elected
>>> byForename = sorteddict(key=lambda pm: (pm.forename, pm.surname))
>>> bySurname = sorteddict(key=lambda pm: (pm.surname, pm.forename))
>>> byName = sorteddict(key=lambda pm: (pm.surname, pm.forename,
...                                     pm.elected), reverse=True)
>>> byElected = sorteddict(key=lambda pm: pm.elected)
>>> for forename, surname, elected in (
...         ("Ramsay", "MacDonald", "1924-01-22"),
...         ("Arthur", "Balfour", "1902-07-11"),
...         ("Herbert Henry", "Asquith", "1908-04-07"),
...         ("Stanley", "Baldwin", "1924-11-04"),
...         ("David", "Lloyd George", "1916-12-07"),
...         ("Andrew", "Bonar Law", "1922-10-23"),
...         ("Henry", "Campbell-Bannerman", "1905-12-05"),
...         ("Stanley", "Baldwin", "1923-05-23"),
...         ("Ramsay", "MacDonald", "1929-06-05")):
...     pm = PrimeMinister(forename, surname, elected)
...     byForename[pm] = pm
...     bySurname[pm] = pm
...     byName[pm] = pm
...     byElected[pm] = pm
>>> [pm.forename for pm in byForename.values()]
['Andrew', 'Arthur', 'David', 'Henry', 'Herbert Henry', 'Ramsay', \
'Ramsay', 'Stanley', 'Stanley']
>>> [pm.surname for pm in bySurname.values()]
['Asquith', 'Baldwin', 'Baldwin', 'Balfour', 'Bonar Law', \
'Campbell-Bannerman', 'Lloyd George', 'MacDonald', 'MacDonald']
>>> ["%s %s %s" % (pm.forename, pm.surname, pm.elected) \
     for pm in byName.values()]
['Ramsay MacDonald 1929-06-05', 'Ramsay MacDonald 1924-01-22', \
'David Lloyd George 1916-12-07', 'Henry Campbell-Bannerman 1905-12-05', \
'Andrew Bonar Law 1922-10-23', 'Arthur Balfour 1902-07-11', \
'Stanley Baldwin 1924-11-04', 'Stanley Baldwin 1923-05-23', \
'Herbert Henry Asquith 1908-04-07']
>>> ["%s %s %s" % (pm.forename, pm.surname, pm.elected) \
     for pm in byElected.values()]
['Arthur Balfour 1902-07-11', 'Henry Campbell-Bannerman 1905-12-05', \
'Herbert Henry Asquith 1908-04-07', 'David Lloyd George 1916-12-07', \
'Andrew Bonar Law 1922-10-23', 'Stanley Baldwin 1923-05-23', \
'Ramsay MacDonald 1924-01-22', 'Stanley Baldwin 1924-11-04', \
'Ramsay MacDonald 1929-06-05']

Thanks to Python's object references, even though there are four
sorteddicts referring to the same PrimeMinister objects, only one instance
of each object is held in memory.

>>> files = ["README.txt", "readme", "MANIFEST", "test.py"]
>>> d = sorteddict([(name, name) for name in files],
...                cmp=lambda a, b: cmp(a.lower(), b.lower()))
>>> d.keys()
['MANIFEST', 'readme', 'README.txt', 'test.py']

Here are a few tests for some of the base class methods that are not
reimplemented:

>>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
>>> d.get("X", 21)
21
>>> d.get("i")
4
>>> d.has_key("a")
True
>>> d.has_key("x")
False
>>> "a" in d
True
>>> "x" in d
False
>>> len(d)
6
>>> del d["n"]
>>> del d["y"]
>>> len(d)
4
>>> d.clear()
>>> len(d)
0
>>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
>>> d["i"]
4
>>> d["y"]
6
>>> d["z"]
Traceback (most recent call last):
...
KeyError: 'z'

Check that a mix of adding and removing keys doesn't cause confusion:

>>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
>>> d.keys()
['a', 'i', 'n', 's', 't', 'y']
>>> del d["t"]
>>> d["t"]=6
>>> d.keys()
['a', 'i', 'n', 's', 't', 'y']

"""

__author__ = "Mark Summerfield"
__version__ = "1.1.0"


class sorteddict(dict):
    """A dictionary that is sorted by key or by the given cmp or key function.

    The sorteddict always returns any list or iterator in sorted order.
    For best performance prefer a key argument to a cmp one. If neither
    is given __lt__() (falling back to __cmp__()) will be used for
    ordering.

    This particular implementation has reasonable performance if the
    pattern of use is: lots of edits, lots of lookups, ..., but gives
    its worst performance if the pattern of use is: edit, lookup, edit,
    lookup, ..., in which case using a plain dict and sorted() will
    probably be better.
    
    If you want to initialize with a dict, either use
    sorteddict(dict(...), ...), or create the sorteddict and then call
    update with the arguments normally passed to a dict constructor.
    """

    def __init__(self, iterable=None, cmp=None, key=None, reverse=False):
        """Initializes the sorteddict using the same arguments as sorted()

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> d.items()
        [('a', 2), ('i', 4), ('n', 3), ('s', 1), ('t', 5), ('y', 6)]
        >>> str(sorteddict())
        '{}'
        >>> e = sorteddict(d)
        >>> e.items()
        [('a', 2), ('i', 4), ('n', 3), ('s', 1), ('t', 5), ('y', 6)]
        """
        if iterable is None:
            iterable = []
        dict.__init__(self, iterable)
        self.__cmp = cmp
        self.__key = key
        self.__reverse = reverse
        self.__keycache = None
        self.__addkeys = set()
        self.__delkeys = set()

    @property
    def __keys(self):
        if self.__keycache is None:
            self.__keycache = dict.keys(self)
            self.__addkeys = set()
            self.__delkeys = set()
            self.__keycache.sort(cmp=self.__cmp, key=self.__key,
                                 reverse=self.__reverse)
        else:
            if self.__delkeys:
                delkeys = self.__delkeys
                self.__keycache = [key for key in self.__keycache if key not in delkeys]
                self.__delkeys = set()

            if self.__addkeys:
                self.__keycache += list(self.__addkeys)
                self.__addkeys = set()
                self.__keycache.sort(cmp=self.__cmp, key=self.__key,
                                     reverse=self.__reverse)
        return self.__keycache


    def __invalidate_key_cache(self):
        self.__keycache = None
        self.__addkeys = set()
        self.__delkeys = set()

    def __addkey(self, key):
        if key in self.__delkeys:
            self.__delkeys.remove(key)
        else:
            self.__addkeys.add(key)

    def __removekey(self, key):
        if key in self.__addkeys:
            self.__addkeys.remove(key)
        else:
            self.__delkeys.add(key)

    def update(self, *args, **kwargs):
        """Updates the sorteddict using the same arguments as dict

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5))
        >>> d.update(a=4, z=-4)
        >>> d.items()
        [('a', 4), ('i', 4), ('n', 3), ('s', 1), ('t', 5), ('z', -4)]
        >>> del d["a"]
        >>> del d["i"]
        >>> d.update({'g': 9}, a=1, z=3)
        >>> d.items()
        [('a', 1), ('g', 9), ('n', 3), ('s', 1), ('t', 5), ('z', 3)]
        >>> e = sorteddict(dict(p=4, q=5))
        >>> del d["a"]
        >>> del d["n"]
        >>> e.update(d)
        >>> e.items()
        [('g', 9), ('p', 4), ('q', 5), ('s', 1), ('t', 5), ('z', 3)]
        """
        self.__invalidate_key_cache()
        dict.update(self, *args, **kwargs)


    @classmethod
    def fromkeys(cls, iterable, value=None):
        """A class method that returns an sorteddict whose keys are
        from the iterable and each of whose values is value

        >>> d = sorteddict()
        >>> e = d.fromkeys("KYLIE", 21)
        >>> e.items()
        [('E', 21), ('I', 21), ('K', 21), ('L', 21), ('Y', 21)]
        >>> e = sorteddict.fromkeys("KYLIE", 21)
        >>> e.items()
        [('E', 21), ('I', 21), ('K', 21), ('L', 21), ('Y', 21)]
        """
        dictionary = cls()
        for key in iterable:
            dictionary[key] = value
        return dictionary


    def copy(self):
        """Returns a shallow copy of this sorteddict

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> e = d.copy()
        >>> e.items()
        [('a', 2), ('i', 4), ('n', 3), ('s', 1), ('t', 5), ('y', 6)]
        >>> d = sorteddict()
        >>> e = d.copy()
        >>> e.items()
        []
        """
        return sorteddict(dict.copy(self), cmp=self.__cmp,
                          key=self.__key, reverse=self.__reverse)


    def clear(self):
        """Removes every item from this sorteddict

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> len(d)
        6
        >>> d.clear()
        >>> len(d)
        0
        >>> d["m"] = 3
        >>> d["a"] = 5
        >>> d["z"] = 7
        >>> d["e"] = 9
        >>> d.keys()
        ['a', 'e', 'm', 'z']
        """
        self.__invalidate_key_cache()
        dict.clear(self)


    def setdefault(self, key, value):
        """If key is in the dictionary, returns its value;
        otherwise adds the key with the given value which is also
        returned

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> d.setdefault("n", 99)
        3
        >>> d.values()
        [2, 4, 3, 1, 5, 6]
        >>> d.setdefault("r", -20)
        -20
        >>> d.items()[2:]
        [('n', 3), ('r', -20), ('s', 1), ('t', 5), ('y', 6)]
        >>> d.setdefault("@", -11)
        -11
        >>> d.setdefault("z", 99)
        99
        >>> d.setdefault("m", 50)
        50
        >>> d.keys()
        ['@', 'a', 'i', 'm', 'n', 'r', 's', 't', 'y', 'z']
        """
        if key not in self:
            self.__addkey(key)
        return dict.setdefault(self, key, value)


    def pop(self, key, value=None):
        """If key is in the dictionary, returns its value and removes it
        from the dictionary; otherwise returns the given value

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> d.pop("n")
        3
        >>> "n" in d
        False
        >>> d.pop("q", 41)
        41
        >>> d.keys()
        ['a', 'i', 's', 't', 'y']
        >>> d.pop("a")
        2
        >>> d.pop("t")
        5
        >>> d.keys()
        ['i', 's', 'y']
        """
        if key not in self:
            return value
        self.__removekey(key)
        return dict.pop(self, key, value)


    def popitem(self):
        """Returns and removes an arbitrary item from the dictionary

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> len(d)
        6
        >>> item = d.popitem()
        >>> item = d.popitem()
        >>> item = d.popitem()
        >>> len(d)
        3
        """
        item = dict.popitem(self)
        self.__removekey(item[0])
        return item


    def keys(self):
        """Returns the dictionary's keys in sorted order

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> d.keys()
        ['a', 'i', 'n', 's', 't', 'y']
        """
        return self.__keys[:]


    def values(self):
        """Returns the dictionary's values in key order

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> d.values()
        [2, 4, 3, 1, 5, 6]
        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6),
        ...               reverse=True)
        >>> d.values()
        [6, 5, 1, 3, 4, 2]
        >>> d = sorteddict(dict(S=1, a=2, N=3, i=4, T=5, y=6),
        ...                cmp=lambda a, b: cmp(a.lower(), b.lower()))
        >>> d.keys()
        ['a', 'i', 'N', 'S', 'T', 'y']
        """
        return [self[key] for key in self.__keys]


    def items(self):
        """Returns the dictionary's items in key order

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> d.items()
        [('a', 2), ('i', 4), ('n', 3), ('s', 1), ('t', 5), ('y', 6)]
        """
        return [(key, self[key]) for key in self.__keys]


    def __iter__(self):
        """Returns an iterator over the dictionary's keys

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> list(d)
        ['a', 'i', 'n', 's', 't', 'y']
        """
        return iter(self.__keys)


    def iterkeys(self):
        """Returns an iterator over the dictionary's keys

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> list(d)
        ['a', 'i', 'n', 's', 't', 'y']
        """
        return iter(self.__keys)


    def itervalues(self):
        """Returns an iterator over the dictionary's values in key order

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> list(d.itervalues())
        [2, 4, 3, 1, 5, 6]
        """
        for key in self.__keys:
            yield self[key]


    def iteritems(self):
        """Returns an iterator over the dictionary's values in key order

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> list(d.iteritems())
        [('a', 2), ('i', 4), ('n', 3), ('s', 1), ('t', 5), ('y', 6)]
        """
        for key in self.__keys:
            yield key, self[key]


    def __delitem__(self, key):
        """Deletes the item with the given key from the dictionary

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> del d["s"]
        >>> del d["y"]
        >>> del d["a"]
        >>> d.keys()
        ['i', 'n', 't']
        """
        self.__removekey(key)
        dict.__delitem__(self, key)


    def __setitem__(self, key, value):
        """If key is in the dictionary, sets its value to value;
        otherwise adds the key to the dictionary with the given value

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5, y=6))
        >>> d["t"] = -17
        >>> d["z"] = 43
        >>> d["@"] = -11
        >>> d["m"] = 22
        >>> d["r"] = 5
        >>> d.keys()
        ['@', 'a', 'i', 'm', 'n', 'r', 's', 't', 'y', 'z']
        """
        if key not in self:
            self.__addkey(key)
        dict.__setitem__(self, key, value)


    def __repr__(self):
        """
        >>> sorteddict()
        sorteddict()
        >>> sorteddict({'a':1})
        sorteddict({'a': 1})
        >>> def comparison(a,b): return cmp(a,b)
        >>> def keyfn(a): return a
        >>> sorteddict({'a':1}, cmp=comparison) #doctest: +ELLIPSIS
        sorteddict({'a': 1}, cmp=<function comparison at ...>)
        >>> sorteddict({'a':1}, key=keyfn, reverse=True) #doctest: +ELLIPSIS
        sorteddict({'a': 1}, key=<function keyfn at ...>, reverse=True)
        """
        args = []
        if self:
            args.append(dict.__repr__(self))
        if self.__cmp is not None:
            args.append('cmp=%r' % self.__cmp)
        if self.__key is not None:
            args.append('key=%r' % self.__key)
        if self.__reverse is not False:
            args.append('reverse=%r' % self.__reverse)
        return "%s(%s)" % (self.__class__.__name__, ', '.join(args))


    def __str__(self):
        """Returns a human readable string representation of the
        dictionary
       
        The returned string is proportional in size to the number of
        items so could be very large.

        >>> d = sorteddict(dict(s=1, a=2, n=3, i=4, t=5))
        >>> str(d)
        "{'a': 2, 'i': 4, 'n': 3, 's': 1, 't': 5}"
        >>> d = sorteddict({2: 'a', 3: 'm', 1: 'x'})
        >>> str(d)
        "{1: 'x', 2: 'a', 3: 'm'}"
        """
        return "{%s}" % ", ".join(
               ["%r: %r" % (key, self[key]) for key in self.__keys])


if __name__ == "__main__":
    import doctest
    doctest.testmod()

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


From arnodel at googlemail.com  Sun Sep  9 15:39:48 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 09 Sep 2007 12:39:48 -0700
Subject: Modul (%) in python not like in C?
In-Reply-To: <mailman.295.1189365378.2658.python-list@python.org>
References: <880dece00709091201n449d4c2k31998a5d426de17d@mail.gmail.com>
	<mailman.295.1189365378.2658.python-list@python.org>
Message-ID: <1189366788.800728.209180@19g2000hsx.googlegroups.com>

On Sep 9, 8:15 pm, "J. Cliff Dyer" <j... at sdf.lonestar.org> wrote:
> Dotan Cohen wrote:
> > FIrst of all, how is the % symbol (as in 70%6=4) called in English?
>
> > Second, in Turbo C -111%10=-1 however in python -111%10=9. Is one or
> > the other in error? Is this a known gotcha? I tried to google the
> > subject however one cannot google the symbol %. Thanks in advance.
>
> > Dotan Cohen
>
> The % operator is called "modulo" in English.  I don't think the
> difference in implementation is an error.  It's just a difference of
> calculation method.
>
> Python will always yield a number x = m%n such that 0 <= x < n, but
> Turbo C will always yield a number such that if x = m%n -x = -m%n.  That
> is, since 111 % 10 = 1, -111 % 10 = -1.  The two values will always
> differ by n (as used above).
>
> I'm sure there are mathematicians on the list who can give you a more
> technical, precise explanation of the reasons for the different results.

I don't know if there's a mathematical explanation of the difference,
but I prefer the behaviour of the Python modulo operator because for
any a, b, n, if  a = b (mod n) holds then the Python expression 'a % n
== b % n' evaluates to True.

--
Arnaud




From robin at reportlab.com  Wed Sep 19 08:44:54 2007
From: robin at reportlab.com (Robin Becker)
Date: Wed, 19 Sep 2007 13:44:54 +0100
Subject: super() doesn't get superclass
In-Reply-To: <1190178792.662623.164840@o80g2000hse.googlegroups.com>
References: <8764281uea.fsf@benfinney.id.au>
	<1190178792.662623.164840@o80g2000hse.googlegroups.com>
Message-ID: <46F119C6.1070405@chamonix.reportlab.co.uk>

Michele Simionato wrote:
....... interesting stuff ommitted

super seems to return an object of type super, but I cannot seem to find any 
documention on this type except for 3.4.2.3

"Super Binding
If a is an instance of super, then the binding super(B, obj).m() searches 
obj.__class__.__mro__ for the base class A immediately preceding B and then 
invokes the descriptor with the call: A.__dict__['m'].__get__(obj, A). "


-- 
Robin Becker



From paul.hankin at gmail.com  Wed Sep 26 19:22:49 2007
From: paul.hankin at gmail.com (Paul Hankin)
Date: Wed, 26 Sep 2007 23:22:49 -0000
Subject: A question on python performance.
In-Reply-To: <mailman.1127.1190831666.2658.python-list@python.org>
References: <mailman.1127.1190831666.2658.python-list@python.org>
Message-ID: <1190848969.640188.237480@w3g2000hsg.googlegroups.com>

On Sep 26, 7:26 pm, "Joe Goldthwaite" <j... at goldthwaites.com> wrote:
> The code gets kind of wordy so I started trying to figure out how to call
> them dynamically since the param type is the same as the method the
> retrieves it.  I came up with this;
>
> def getValue(trend, param, per):
>    return trend.__class__.__dict__[param](trend, per)
>
> That worked but it seems like the above line would have to do lots more
> object look ups at runtime so I didn't think it would be very efficient.  I
> thought maybe I could add a caller method to the trend class and I came up
> with this;
>
> class trend:
>    ...
>    ...
>    ...
>    def caller(self, param, *args):
>       return self.__class__.__dict__[param](self, *args)
>
> This simplified the getValue function to this;
>
> def getValue(trend, param, per):
>         return trend.caller(param, per)

You're calling a function (getValue) that just calls a method of trend
(caller), that just calls another method of trend (Ptd or Qtd or ...).
You can skip all these steps, and just call the method yourself: the
code that calls getValue(trend, param, per) replace with
trend.<something>(per) if you're calling getValue with a static value
for param, or getattr(trend, param)(per) if param is dynamic.

--
Paul Hankin



From Graham.Dumpleton at gmail.com  Thu Sep 20 21:03:36 2007
From: Graham.Dumpleton at gmail.com (Graham Dumpleton)
Date: Fri, 21 Sep 2007 01:03:36 -0000
Subject: Python,SWIG and libjvm
In-Reply-To: <1190329236.398635.226020@y42g2000hsy.googlegroups.com>
References: <1190329236.398635.226020@y42g2000hsy.googlegroups.com>
Message-ID: <1190336616.212881.171910@i38g2000prf.googlegroups.com>

On Sep 21, 9:00 am, sapsi <saptarshi.g... at gmail.com> wrote:
> Hello,
> I'm not sure if this the correct list but here goes (and sorry for the
> noise). I've been attempting to wrap python around libhdfs.
> So far so good (i've attached the SWIG template at the end). The
> compilation works without errors and the shared objects do have
> references to all the functions.
>
> However, when importing into python
>
> import pyhdfs
>
> i get the following error:
>
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "/home/sguha/tmp/b/hdfs.py", line 7, in ?
>     import _hdfs
> ImportError: libjvm.so: cannot open shared object file: No such file
> or directory
>
> However, libjvm.so is located in /home/sguha/mine/jdk1.6.0_02/jre/lib/
> amd64/server which is present in the PYTHONPATH and sys.path.
> I can understand it complaining <i>while</i> loading the libjvm.so
> but python doesn't locate it even when in the path.
>
> As an aside, the build command for hdfs.c has "   -ljvm  " - this
> should affect SWIG, right? Meaning if my program (e.g) links to a
> library and i want a wrapper around my program (to python) i need SWIG
> templates for my headers only and not for the linked library...right?
> ( I guess the answer is i dont otherwise that would be quite a
> nightmare of work)
>
> Thank you for your time
> Saptarshi
>
> Attachments:
> SWIG template
> %module pyhdfs
>
> %{
> #include "hdfs.h"
> %}
>
> %include "hdfs.h"

Your libjvm.so isn't being found because it isn't in a standard system
library directory. You have a few choices to solve this:

1. Install libjvm.so into /lib or /usr/lib. You may be able to get
away with putting it in /usr/local/lib if your OS is setup to look
there.

2. If a Linux/Solaris box, do:

  LD_LIBRARY_PATH=/home/sguha/mine/jdk1.6.0_02/jre/lib/amd64/server
  export LD_LIBRARY_PATH

then run your application. This will tell you application to look in
that directory for the shared library at run time.

3. If on Linux/Solaris, compile that library directory into the Python
module .so by setting before you compile your Python module:

  LD_RUN_PATH=/home/sguha/mine/jdk1.6.0_02/jre/lib/amd64/server
  export LD_RUN_PATH

This only needs to be done at compile time, but means your module will
always expect it to be in that location.

Graham



From kahrny at gmail.com  Fri Sep  7 06:02:14 2007
From: kahrny at gmail.com (kahrny at gmail.com)
Date: Fri, 07 Sep 2007 10:02:14 -0000
Subject: why should I learn python
In-Reply-To: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
Message-ID: <1189159334.533470.17570@r29g2000hsg.googlegroups.com>

On Sep 6, 10:32 pm, windandwaves <nfranc... at gmail.com> wrote:
> Can someone tell me why I should learn python?  I am a webdeveloper,
> but I often see Python mentioned and I am curious to find out what I
> am missing out on.
>
> Thank you
>
> Nicolaas

 - You never really have to reinvent the wheel, and many python
modules are included by default. This means that you can accomplish
what you wanted to do much faster. Thus You can write a lot less code
to get to what you want to do. If a module does not exist yet, you can
create it!
 - It is kinda close to pseudo code, so you can 'think' much easier in
python.
 - It can be used for many many tasks, and you can adapt your
application as need be.
 - It is still quite fast and lightweight!
 - The community in general is quite helpful
 - It is quite fun to use
 - If it's good enough for nasa.. :-P

In regards to people claiming it is not 'real', that is a load of poo!
Ignore thy c elitists. Eric Raymond wrote a nice 'Why Python?'
article. http://www.linuxjournal.com/article/3882



From jcd at sdf.lonestar.org  Thu Sep  6 22:57:18 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Thu, 06 Sep 2007 22:57:18 -0400
Subject: why should I learn python
In-Reply-To: <87zlzzs9by.fsf@wilson.homeunix.com>
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>	<mailman.189.1189118213.2658.python-list@python.org>
	<87zlzzs9by.fsf@wilson.homeunix.com>
Message-ID: <46E0BE0E.2040702@sdf.lonestar.org>

Torsten Bronger wrote:
> Hall?chen!
>
> Tom Brown writes:
>
>   
>> [...] Python has been by far the easiest to develop in.  Some
>> people might say it is not "real programming" because it is so
>> easy.
>>     
>
> I can't believe this.  Have you really heard such a statement?
>
> Tsch?,
> Torsten.
>   
The catch-phrase such people often use is "scripting language."  If you 
hear python called a "scripting language," the speaker is obliquely 
implying the superiority of their own "programming language."
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From sbellon at sbellon.de  Thu Sep 13 13:13:41 2007
From: sbellon at sbellon.de (Stefan Bellon)
Date: Thu, 13 Sep 2007 19:13:41 +0200
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<87sl5j5r34.fsf@benfinney.id.au>
	<1189646281.569796.267940@d55g2000hsg.googlegroups.com>
	<87ir6f5mrq.fsf@benfinney.id.au>
	<1189651204.408268.57580@19g2000hsx.googlegroups.com>
	<1i4dddf.piaojwz9lz40N%aleax@mac.com>
	<1189700775.661780.292150@50g2000hsm.googlegroups.com>
Message-ID: <20070913191341.69dae855@cube.tz.axivion.com>

On Thu, 13 Sep, TheFlyingDutchman wrote:

> Bruce said that no other mainstream OO language is explicitly passing
> the object as a parameter to class methods.

Ada 95 does. And Ada 95 was the first standardized OO language. Now
with Ada 2005 you can either pass the the object explicitly as first
parameter (like in Ada 95) or you can call the method on the object
(like in Java, C++, Python, ...) and the object is passed implicitly.

-- 
Stefan Bellon


From steve at REMOVE-THIS-cybersource.com.au  Sun Sep  9 09:03:22 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sun, 09 Sep 2007 13:03:22 -0000
Subject: Does shuffle() produce uniform result ?
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
	<mailman.243.1187955760.32294.python-list@python.org>
	<tooru_honda-7C82D1.10432725082007@wvnews01.netvigator.com>
	<tooru_honda-58C552.20355225082007@wvnews01.netvigator.com>
	<tooru_honda-978B9E.11304526082007@wvnews01.netvigator.com>
	<slrnfdnojg.inr.apardon@rcpc42.vub.ac.be>
	<7xejhfbsjo.fsf@ruckus.brouhaha.com>
	<slrnfdpup6.inr.apardon@rcpc42.vub.ac.be>
	<7xabs39bin.fsf@ruckus.brouhaha.com>
	<13drijhfqlvlk96@corp.supernews.com>
	<fbvmg0$1p3$3@lust.ihug.co.nz> <7xhcm4pl5m.fsf@ruckus.brouhaha.com>
	<fc059c$aa2$6@lust.ihug.co.nz>
Message-ID: <13e7roq4dbo6043@corp.supernews.com>

On Sun, 09 Sep 2007 18:53:32 +1200, Lawrence D'Oliveiro wrote:

> In message <7xhcm4pl5m.fsf at ruckus.brouhaha.com>, Paul Rubin wrote:
> 
>> Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> writes:
>>
>>> Except that the NSA's reputation has taken a dent since they failed to
>>> anticipate the attacks on MD5 and SHA-1.
>> 
>> NSA had nothing to do with MD5 ...
> 
> Nevertheless, it was their job to anticipate attacks on it. After all,
> they call themselves the "National _Security_ Agency", don't they?

The NSA has many jobs, and doing public research in crypto is only one of 
them -- and a particularly small one at that. For all we know, they had 
an attack on MD5 ten years before anyone else and didn't tell anyone 
because keeping it secret made it useful for one of their other jobs.


>> ... and it's to NSA's credit that SHA-1 held up for as long as it did.
> 
> But they have no convincing proposal for a successor. That means the gap
> between the classified and non-classified state of the art has shrunk
> down to insignificance.

I don't see how that follows. But even if it does... maybe it's because 
there is nowhere to go from here? You can't make mathematical 
breakthroughs to order.


-- 
Steven.


From hniksic at xemacs.org  Wed Sep 19 08:02:55 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Wed, 19 Sep 2007 14:02:55 +0200
Subject: super() doesn't get superclass
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au>
	<46f0fba0$0$29605$426a34cc@news.free.fr>
	<1190199134.791808.267110@22g2000hsm.googlegroups.com>
	<87fy1a6h3b.fsf@mulj.homelinux.net>
	<1190201811.727402.172330@k79g2000hse.googlegroups.com>
Message-ID: <87bqby6exc.fsf@mulj.homelinux.net>

Michele Simionato <michele.simionato at gmail.com> writes:

> On Sep 19, 1:16 pm, Hrvoje Niksic <hnik... at xemacs.org> wrote:
>> Your arguments against the superclass term seem to assume that there
>> is only a single superclass to a particular class.
>
> If you say "the" superclass, then you also assume it is unique.

FWIW, Bruno said "a", at least in the section you quoted.

> But the big issue is that the order of the methods depends on the
> second argument to super, the instance, so there is no useful
> concept of the superclass of the first argument of super.

No argument here.


From steve at REMOVE-THIS-cybersource.com.au  Thu Sep  6 08:49:02 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Thu, 06 Sep 2007 12:49:02 -0000
Subject: interesting puzzle......try this you will be rewarded...
References: <1189072576.997085.32360@r29g2000hsg.googlegroups.com>
	<13dvn2q9qogq484@corp.supernews.com>
	<mailman.150.1189079709.2658.python-list@python.org>
Message-ID: <13dvtpub9gte735@corp.supernews.com>

On Thu, 06 Sep 2007 04:52:11 -0700, Steve Holden wrote:

>> In case it wasn't obvious, the site is nothing but adware. Banner ads,
>> google ads, text ads, blah blah blah. I stopped at page 1.
>> 
>> 
> I'm surprised you went even that far. It was pretty obviously going to
> be a click trap. Why bother?

Stupidity?

No, wait, I meant curiosity. I wanted to see if it was at least targeted 
to the audience (Python developers). It wasn't.


-- 
Steven.


From tdwdotnet at gmail.com  Fri Sep 28 17:04:07 2007
From: tdwdotnet at gmail.com (Tim Williams)
Date: Fri, 28 Sep 2007 22:04:07 +0100
Subject: List search
In-Reply-To: <eafb6$46fd68a3$4275d90a$4234@FUSE.NET>
References: <eafb6$46fd68a3$4275d90a$4234@FUSE.NET>
Message-ID: <9afea2ac0709281404u62072355o5474a83e3cac5b6c@mail.gmail.com>

On 28/09/2007, Kevin Walzer <kw at codebykevin.com> wrote:
> I'm having a problem with searching a list. Here's my code:
>
> mylist = ['x11', 'x11-wm', 'x11-system']
>
> for line in mylist:
>        if 'x11' in line:
>                print line
>
> This results in the following output:
>
> x11
> x11-wm
> x11-system
>

That output is correct,  you are asking your script to print any list
item containing x11 when what you actually wanted was a list item that
is the string 'x11'

mylist = ['x11', 'x11-wm', 'x11-system']
for item in mylist:
      if item ==  'x11':
               print line

If there is only ever one 'x11' in the list you could also consider

print mylist.index('x11')

and

print mylist[mylist.index('x11')]

Also, before iterating the whole list check that 'x11' exists

if 'x11' in mylist:
    do stuff

and list comprehesions

print [x for x in mylist if x == 'x11']

HTH :)

Tim Williams


From gagsl-py2 at yahoo.com.ar  Sun Sep  9 23:42:37 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 10 Sep 2007 00:42:37 -0300
Subject: concise code (beginner)
References: <13dsvqrqivtf092@corp.supernews.com>
	<13dv4uqqb806ff0@corp.supernews.com> <fbqo83$8fd$1@lust.ihug.co.nz>
	<13e99756io95p66@corp.supernews.com>
Message-ID: <op.tye5xbfwx6zn5v@a98gizw.cpe.telecentro.net.ar>

> "Lawrence D'Oliveiro" <ldo at geek-central.gen.new_zealand> wrote in message
> news:fbqo83$8fd$1 at lust.ihug.co.nz...
>>
>> Why not just build a new list? E.g.
>>
>>    newdevs = []
>>    for dev in devs :
>>        ...
>>        if not removing_dev :
>>            newdevs.append(dev)
>>        #end if
>>    #end for
>>    devs = newdevs

En Sun, 09 Sep 2007 22:58:54 -0300, bambam <david at asdf.asdf> escribi?:

> I can try that, but I'm not sure that it will work. The problem
> is that devList is just a pointer to a list owned by someone else.
> Making devList point to a new list won't work: I need to make
> the parent list different. I could do this by adding an extra
> level of indirection, but I think at the risk making the call
> environment more complex.

Then use [:] to *replace* all the old list items, do not merely rebind the  
name. That last statement
should be, instead:

devs[:] = newdevs

(Please don't top-post)

-- 
Gabriel Genellina



From Shawn at Milochik.com  Mon Sep 17 15:11:02 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Mon, 17 Sep 2007 15:11:02 -0400
Subject: pattern combinations
In-Reply-To: <d6a0d8f10709171204v5a8b0ff5haab94b80e2c28e1@mail.gmail.com>
References: <d6a0d8f10709171204v5a8b0ff5haab94b80e2c28e1@mail.gmail.com>
Message-ID: <2dc0c81b0709171211o58d72f00q8147094a6b01a54d@mail.gmail.com>

On 9/17/07, dorje tarap <dorjetarap at googlemail.com> wrote:
> Hi all,
>
>  Given some patterns such as "...t...s." I need to make all possible
> combinations given a separate list for each position. The length of the
> pattern is fixed to 9, so thankfully that reduces a bit of the complexity.
>
>  For example I have the following:
>
>  pos1 = ['a',' t']
>  pos2 = ['r', 's']
>  pos3 = ['n', 'f']
>
>  So if the pattern contains a '.' character at position 1 it could be 'a' or
> 't'. For the pattern '.s.' (length of 3 as example) all combinations would
> be:
>
>  asn
>  asf
>  tsn
>  tsf
>
>  Thanks
> --
> http://mail.python.org/mailman/listinfo/python-list
>


Sounds like homework to me.


From willmaier at ml1.net  Fri Sep  7 08:14:34 2007
From: willmaier at ml1.net (Will Maier)
Date: Fri, 7 Sep 2007 07:14:34 -0500
Subject: Generating a unique identifier
In-Reply-To: <13e2fgbbpsatm39@corp.supernews.com>
References: <13e2fgbbpsatm39@corp.supernews.com>
Message-ID: <20070907121434.GC26089@lass.lfod.us>

On Fri, Sep 07, 2007 at 12:03:23PM -0000, Steven D'Aprano wrote:
[...]
> which is easy enough, but I thought I'd check if there was an existing 
> solution in the standard library that I missed. Also, for other 
> applications, I might want them to be rather less predictable.

2.5 includes the uuid module for RFC 4122 universally-unique IDs:

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

-- 

[Will Maier]-----------------[willmaier at ml1.net|http://www.lfod.us/]


From stefan.behnel-n05pAM at web.de  Mon Sep 24 04:04:22 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Mon, 24 Sep 2007 10:04:22 +0200
Subject: elementtree question
In-Reply-To: <fd0lmi$pm8$1@foggy.unx.sas.com>
References: <fd0lmi$pm8$1@foggy.unx.sas.com>
Message-ID: <46F76F86.6010307@web.de>

Tim Arnold wrote:
> Hi, I'm using elementtree and elementtidy to work with some HTML files. For 
> some of these files I need to enclose the body content in a new div tag, 
> like this:
> <body>
>   <div class="remapped">
>    original contents...
>   </div>
> </body>

Give lxml.etree (or lxml.html) a try:

    tree = etree.parse("http://url.to/some.html", etree.HTMLParser())
    body = tree.find("body")

and then:

    div = etree.Element("div", {"class" : "remapped"})
    div.extend(body)
    body.append(div)

or alternatively:

    children = list(body)
    div = etree.SubElement(body, "div", {"class" : "remapped"})
    div.extend(children)

http://codespeak.net/lxml/

and for lxml.html, which is currently in alpha status:

http://codespeak.net/lxml/dev/

ET 1.3 will also support the extend() function, BTW.

Stefan


From bj_666 at gmx.net  Mon Sep 10 03:07:12 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 10 Sep 2007 07:07:12 GMT
Subject: Python syntax wart
References: <fbvvil$7dj$1@lust.ihug.co.nz>
	<5khh6nF3i5nuU1@mid.uni-berlin.de> <46E390B7.2080808@web.de>
	<fc0518$aa2$5@lust.ihug.co.nz> <5ki2sdF3nr68U1@mid.individual.net>
	<fc2c52$i1l$3@lust.ihug.co.nz>
Message-ID: <5kk8p0F3vfqqU1@mid.uni-berlin.de>

On Mon, 10 Sep 2007 15:02:58 +1200, Lawrence D'Oliveiro wrote:

> In message <5ki2sdF3nr68U1 at mid.individual.net>, Bjoern Schliessmann wrote:
> 
>> Lawrence D'Oliveiro wrote:
>>> But then you can no longer use indentation to display the
>>> two-dimensional structure of the statement.
>> 
>> How can a statement be two-dimensional?
> 
> Like this (from C++ code, but the idea is the same):
> 
>     if
>       (
>             ThisCh >= 'A' and ThisCh <= 'Z'
>         or
>             ThisCh >= '0' and ThisCh <= '9'
>         or
>             ThisCh == '_'
>         or
>             ThisCh == '.'
>       )
>         ...

I still down see the second dimension.  If you say 2D I think of
something like a table with two columns and not a sequential condition
spread over several lines.

Ciao,
	Marc 'BlackJack' Rintsch


From mauriceling at acm.org  Thu Sep  6 21:50:31 2007
From: mauriceling at acm.org (Maurice LING)
Date: Fri, 07 Sep 2007 01:50:31 GMT
Subject: why should I learn python
In-Reply-To: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
Message-ID: <46e0ae64$1@news.unimelb.edu.au>

windandwaves wrote:
> Can someone tell me why I should learn python?  I am a webdeveloper,
> but I often see Python mentioned and I am curious to find out what I
> am missing out on.
> 
> Thank you
> 
> Nicolaas
> 

The last edition of The Python Papers (volume 2 issue 2, 
http://archive.pythonpapers.org/ThePythonPapersVolume2Issue2.pdf) has an 
article on Django, a web framework. It may help you see what you are 
missing out on.

maurice


From duncan.booth at invalid.invalid  Tue Sep 18 07:44:58 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 18 Sep 2007 11:44:58 GMT
Subject: Looking for web software in Python.
References: <mailman.691.1190080412.2658.python-list@python.org>
Message-ID: <Xns99AF8028D38D8duncanbooth@127.0.0.1>

Kevin Ar18 <kevinar18 at hotmail.com> wrote:

> 
> Are any of the following pieces of web software available in Python
> (under a non-copyleft license like BSD or MIT or Python license)? 
> 
> 
> Mailing list - with web accessable archive and list maintenance.
> Source control
> Wiki System
> 
> Again, only non-copyleft licenses like MIT, BSD, or public domain.
> 
> 
I'm curious why copyleft matters to you. Were you planning on taking the 
mailing list software and redistributing a modified version?

There is nothing in the GPL which prevents you taking something like 
Mailman, modifying it as much as you like and using the improved version. 
There is no requirement on you to release your changes provided you don't 
actually distribute the code to third parties.

What do you mean by 'source control' available in Python? Subversion isn't 
written in Python but you can certainly write Python code which interacts 
with it either client or server-side. The Subversion license is Apache 
style so that would suite you although again I doubt whether it matters.


From aleax at mac.com  Sun Sep  2 12:55:29 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 2 Sep 2007 09:55:29 -0700
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
	<1188735642.391419.103650@19g2000hsx.googlegroups.com>
	<1188740716.423349.304370@y42g2000hsy.googlegroups.com>
	<1188742231.470668.29910@g4g2000hsf.googlegroups.com>
Message-ID: <1i3t4ha.1r0xx7414w0taxN%aleax@mac.com>

Mark Dickinson <dickinsm at gmail.com> wrote:

> On Sep 2, 9:45 am, jwrweather... at gmail.com wrote:
> > [snip code]
> >
> > Thanks for that. I realise that improving the algorithm will speed
> > things up. I wanted to know why my less than perfect algorithm was so
> > much slower in python than exactly the same algorithm in C. Even when
> > turning off gcc's optimiser with the -O0 flag, the C version is still
> >
> > > 100 times quicker.
> 
> Well, for one thing, you're creating half a million xrange objects in
> the course of the search.  All the C code has
> to do is increment a few integers.

I don't think the creation of xrange objects is a meaningful part of
Python's execution time here.  Consider:

M = 1000
solutions = [0] * M

def f2():
    "a*a + b*b precalculated"
    for a in xrange(1, M):
        a2 = a*a
        for b in xrange(1, M - a):
            s = a2 + b*b
            for c in xrange(1, M - a - b):
                if s == c*c:
                    solutions[a+b+c] += 1

def f3(M=M, solutions=solutions):
    "pull out all the stops"
    xrs = [xrange(1, k) for k in xrange(0, M+1)]
    for a in xrs[M]:
        a2 = a*a
        for b in xrs[M-a]:
            s = a2 + b*b
            for c in xrs[M-a-b]:
                if s == c*c:
                    solutions[a+b+c] += 1

import time

t = time.time()
f2()
e = time.time()
print e-t, max(xrange(M), key=solutions.__getitem__)

solutions = [0]*M
t = time.time()
f3(M, solutions)
e = time.time()
print e-t, max(xrange(M), key=solutions.__getitem__)


f2 is Arnaud's optimization of the OP's algorithm by simple hoisting; f3
further hoists the xrange creation -- it creates only 1000 such objects
rather than half a million.  And yet...:

brain:~/py25 alex$ python puz.py
34.6613101959 840
36.2000119686 840
brain:~/py25 alex$ 

...which suggests that creating an xrange object is _cheaper_ than
indexing a list...


Alex


From nagle at animats.com  Mon Sep 24 16:48:22 2007
From: nagle at animats.com (John Nagle)
Date: Mon, 24 Sep 2007 13:48:22 -0700
Subject: M2Crypto 0.18 - new version, same old build bugs - more details
In-Reply-To: <xoudna66YI1O5m7bnZ2dnUVZ_umdnZ2d@comcast.com>
References: <eiAIi.10067$924.3670@newssvr23.news.prodigy.net>
	<xoudna66YI1O5m7bnZ2dnUVZ_umdnZ2d@comcast.com>
Message-ID: <46F82296.5010701@animats.com>

Heikki Toivonen wrote:
> John Nagle wrote:
> 
>>Back in March, I posted this:
>>
>>
>>>    Hit that with OpenSSL.  Red Hat took elliptical curve cryptography
>>>out of Fedora 6 for patent reasons.  With that missing, M2Crypto won't
>>>build.  It ought to; the implementor of M2Crypto thought of that, because
>>>it's an optional feature.  But M2Crypto uses SWIG.  SWIG doesn't normally
>>>process nested include files.  OpenSSL had changed their configuration
>>>approach to use nested include files.  So SWIG didn't see the #define
>>>that
>>>said to turn off elliptical curve crypto support.  This resulted in
>>>compile errors in the 24,000 lines of code that come out of SWIG. 
>>
>>   That was for M2Crypto 0.17.
>>
>>   It's still broken in M2Crypto 0.18.
> 
> 
> This was reported as
> https://bugzilla.osafoundation.org/show_bug.cgi?id=9404 and fixed, at
> least according to the person who reported the bug. I'd be curious to
> know why the fix does not work for you...
> 
> As an alternative, does it work if you add line 130 to setup.py:
> 
> '-DOPENSSL_NO_EC', # Uncomment if you have
> trouble compiling without EC support

OK, here's the build failing:

python setup.py build
running build
running build_py
running build_ext
building 'M2Crypto.__m2crypto' extension
swigging SWIG/_m2crypto.i to SWIG/_m2crypto_wrap.c
swig -python -I/usr/local/include/python2.5 -I/usr/include -o 
SWIG/_m2crypto_wrap.c SWIG/_m2crypto.i
/usr/include/openssl/opensslconf.h:27: Error: CPP #error ""This openssl-devel 
package does not work your architecture?"". Use the -cpperraswarn option to 
continue swig processing.
error: command 'swig' failed with exit status 1

OK, let's check the requirements, from
http://chandlerproject.org/bin/view/Projects/MeTooCrypto
M2Crypto 0.18:
     * Python 2.3 or newer
          o m2urllib2 requires Python 2.4 or newer
     * OpenSSL 0.9.7 or newer
           o Some optional new features will require OpenSSL 0.9.8 or newer
     * SWIG 1.3.24 or newer

python --version
  Python 2.5 [OK here, 2.5 >= 2.4]

swig -version
  SWIG Version 1.3.31  [OK here; 1.3.31 >= 1.3.24]
  Compiled with i386-redhat-linux-g++ [i386-redhat-linux-gnu]

openssl
OpenSSL> version
OpenSSL 0.9.8a 11 Oct 2005  [OK here; 0.9.8a => 0.9.7.]

Tried the suggested patch to "setup.py":
diff setup.py.orig setup.py
130c130
<                                   #'-D__i386__', # Uncomment for early OpenSSL 
0.9.7 versions
---
 >                                   '-D__i386__', # Uncomment for early OpenSSL 
0.9.7 versions

No change in error message.  That gets us

-bash-3.1$ python setup.py build
running build
running build_py
running build_ext
building 'M2Crypto.__m2crypto' extension
swigging SWIG/_m2crypto.i to SWIG/_m2crypto_wrap.c
swig -python -I/usr/local/include/python2.5 -I/usr/include -o 
SWIG/_m2crypto_wrap.c SWIG/_m2crypto.i
/usr/include/openssl/opensslconf.h:27: Error: CPP #error ""This openssl-devel 
package does not work your architecture?"". Use the -cpperraswarn option to 
continue swig processing.
error: command 'swig' failed with exit status 1

But notice that the -D entry didn't appear on the SWIG command line.
Neither did the "-includeall".  The "swig_opts" values around line
129 aren't actually being used.  I think that's left over from the code intended
to allow builds with Python 2.3 and earlier.  The "self.swig_opts" up at
line 53 of "setup.py" seems to be controlling.  The patch was to
the obsolete code.

This is on Fedora Core 5, x86, 32 bit.

					John Nagle



From kyosohma at gmail.com  Wed Sep 19 14:17:01 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 19 Sep 2007 11:17:01 -0700
Subject: Finding prime numbers
In-Reply-To: <mailman.777.1190222135.2658.python-list@python.org>
References: <1190218927.7991.25.camel@apprentice-laptop>
	<82b4f5810709190931u16ee0621xc6608d2bcb2fec5e@mail.gmail.com>
	<1190219929.7991.28.camel@apprentice-laptop>
	<2dc0c81b0709191013k181d1a74m76a08cecadb005c4@mail.gmail.com>
	<mailman.777.1190222135.2658.python-list@python.org>
Message-ID: <1190225821.182650.227540@k79g2000hse.googlegroups.com>

On Sep 19, 12:15 pm, "Shawn Milochik" <Sh... at Milochik.com> wrote:
> Okay, I caught one bug already myself:
>
>  for y in range(3,(math.sqrt(x) + 1)):
>
> should be
>
> for y in range(3,(int(math.sqrt(x)) + 1)):

If you'd just search the archives, you would have found this:

http://groups.google.com/group/comp.lang.python/browse_thread/thread/b134b2235e9c19a6/34857fb0b0b2a4b5?lnk=gst&q=prime+number&rnum=1#34857fb0b0b2a4b5

And Google has many hits. Here's one example:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/366178

Mike



From deets at nospam.web.de  Thu Sep 27 12:39:24 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 27 Sep 2007 18:39:24 +0200
Subject: Implement file download using python
References: <1190910556.681518.277220@o80g2000hse.googlegroups.com>
Message-ID: <5m24lrFb8ao0U1@mid.uni-berlin.de>

 skulka3 at gmail.com wrote:

> Hello,
> 
> I want to implement file downloads inside an authenticated web page,
> such that when a user clicks a link, the server side python code
> connects to a ftp server, downloads a relevant file and then streams
> the file to the browser for the user to open it with the appropriate
> application. In this case it will either be a pdf or a tiff file.
> 
> This function is quite similar to something like writing raw bytes to
> a ServletOutputStream in java to be rendered directly to the user.
> 
> It would be nice if someone can provide guidance, examples on how such
> a task may be accomplished using python.

Fetching using ftplib is easy. But serving depends on what
HTTP-server-environment you use. Please elaborate on that.

Diez


From grante at visi.com  Sat Sep 22 08:57:35 2007
From: grante at visi.com (Grant Edwards)
Date: Sat, 22 Sep 2007 12:57:35 -0000
Subject: Getting rid of bitwise operators in Python 3?
References: <46f49740$0$32514$4c368faf@roadrunner.com>
	<13f99fediasg3ae@corp.supernews.com>
	<46f4c171$0$26367$4c368faf@roadrunner.com>
Message-ID: <13fa49vie86ii1d@corp.supernews.com>

On 2007-09-22, Carl Banks <pavlovevidence at gmail.com> wrote:

>> If you don't want to use the bitwise operations, then ignore
>> them.  Presto!  Simpler syntax.
>
> Until people no longer need to read code written by others, this argument 
> is utter bull.
>
> It's completely besides the point, anyways.  The point is to
> make the language core smaller.

Since when has the size of Python been a concern?

> It would shift code implementing bitwise logic out the core
> parts of Python, and localize it in modulespace.  It's not 
> about trying to make the mental footprint of the language
> smaller; in fact, wouldn't do that at all.

I disagree.  Making the mental footprint of the language
smaller is far more important.  The small size of the mental
footprint is what helps readability, maintainability, and
productivity.  Space in my head is more valuable than space in
my computer.

>>> Obviously, how widespread their usage is would matter.  But
>>> keep in mind it would also be easy to convert the code
>>> automatically, because the Python parser could reliably find
>>> all bitwise operations reliably.
>> 
>> The resulting code wold be fugly.
>
> Of course it would be.  The reason I mention it is that
> automatic convertibility is a key factor in whether a change
> can make it into Python 3.

It matters not whether fugly code is automatically generated or
manually generated.  It's still hard to read and maintain.

-- 
Grant Edwards                   grante             Yow!  I feel... JUGULAR...
                                  at               
                               visi.com            


From __peter__ at web.de  Thu Sep 13 02:03:44 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 13 Sep 2007 08:03:44 +0200
Subject: File Parsing Question
References: <mailman.455.1189630858.2658.python-list@python.org>
	<1189634861.631219.143310@57g2000hsv.googlegroups.com>
	<mailman.456.1189636092.2658.python-list@python.org>
Message-ID: <fcajs0$ft9$02$1@news.t-online.com>

Am Wed, 12 Sep 2007 17:28:08 -0500 schrieb Shankarjee Krishnamoorthi:

> I would prefer to use something with seek. 

Writing Perl in any language?

> I am not able to use seek()
> with "for line in inp". Use tell and seek does not seem to do anything
> with the code. When I try to do
> 
> for line in inp.readlines():

readlines() reads the whole file at once, so inp.tell() will give the
position at the end of the file from now on.

>     # Top of Loop
>     if not condition in line:
>             do_something
>     else:
>           for lines in inp.readlines():
>               if not condition
>                    do_something
>               else:
>                    break
>                    pos = inp.tell()
>    inp.seek(pos)   ---> This line has not effect in the program
> 
> Not sure if Iam missing something very basic. Also the previous line
> needs to be used in the position I call # Top of Loop.

If you want to use seek/tell you can't iterate over the file directly
because

for line in inp: 
   # ...

reads ahead to make that iteration highly efficient -- so you will often
get a position further ahead than the end of the current line. 

But you can use readline() (which doesn't read ahead) in conjunction with
tell/seek; just replace all occurences of

for line in inp:
    # ...

with

for line in iter(inp.readline, ""):
    # ...        

Peter


From lasses_weil at klapptsowieso.net  Fri Sep  7 09:45:30 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Fri, 07 Sep 2007 15:45:30 +0200
Subject: Checking if elements are empty
In-Reply-To: <pan.2007.09.07.10.34.04@REMOVE.THIS.cybersource.com.au>
References: <2323A6D37908A847A7C32F1E3662C80E010A0246@dc1ex01.air.org>	<fbme5d$qa$1@sea.gmane.org>	<mailman.93.1189003016.2658.python-list@python.org>	<fbqedh$31g$1@lust.ihug.co.nz>	<46e115e5$0$7691$9b4e6d93@newsspool2.arcor-online.net>
	<pan.2007.09.07.10.34.04@REMOVE.THIS.cybersource.com.au>
Message-ID: <46e155fb$0$7701$9b4e6d93@newsspool2.arcor-online.net>

Steven D'Aprano wrote:
> On Fri, 07 Sep 2007 11:12:05 +0200, Wildemar Wildenburger wrote:
> 
>> Lawrence D'Oliveiro wrote:
>>> In message <mailman.93.1189003016.2658.python-list at python.org>, Chris
>>> Mellon wrote:
>>>
>>>> On 9/5/07, Steve Holden <steve at holdenweb.com> wrote:
>>>>> Doran, Harold wrote:
>>>>>> Is there a way to check if the first element of y is null?
>>>>>>
>>>>> len(y[0]) == 0
>>>>>
>>>> Better spelled as
>>>>
>>>> if y[0]:
>>> Not a good idea.
>> Why not?
> 
> 
> What happens if y is an empty list?
> 
> 
An exception pops up, of course ;).

It all depends on the (intended) semantics of the program; the original 
question sounds like that list is supposed to have at least one element 
at that point, so there is no problem. And if it's not then that has to 
be dealt with, but that is not the problem here.
So the usual way to check if the first element of a list y is True in a 
boolean context is indeed "if y[0]:" (or for False of course "if not 
y[0]:").

/W


From larry.bates at websafe.com  Wed Sep 19 15:18:06 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Wed, 19 Sep 2007 14:18:06 -0500
Subject: Google and Python
In-Reply-To: <1190228512.627109.308910@n39g2000hsh.googlegroups.com>
References: <1190228512.627109.308910@n39g2000hsh.googlegroups.com>
Message-ID: <ufadnRC5BPZm6GzbnZ2dnUVZ_jOdnZ2d@comcast.com>

TheFlyingDutchman wrote:
> Around 2000 I heard that Google was using Python to some extent. Now I
> see that Guido Van Rossum works for them as well as Alex Martellis who
> has the title "Uber Technical Lead" which seems to imply some fairly
> heavy Python usage there. I was wondering what is done at Google with
> Python and which Python "environments/applications" (Zope, TurboGears,
> mod_python ...) are in use, and what is done with other languages, and
> which other languages are they using.
> 

Have you tried Google "google python".  Turns up a lot of links for me.

-Larry


From mattheww at chiark.greenend.org.uk  Tue Sep 11 13:00:52 2007
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 11 Sep 2007 18:00:52 +0100 (BST)
Subject: Modul (%) in python not like in C?
References: <mailman.294.1189364475.2658.python-list@python.org>
	<13ec37dri08s7a3@corp.supernews.com>
	<EAoFi.6785$JD.2181@newssvr21.news.prodigy.net>
	<mailman.367.1189507338.2658.python-list@python.org>
Message-ID: <yZn*XjBUr@news.chiark.greenend.org.uk>

J. Cliff Dyer <jcd at sdf.lonestar.org> wrote:
>Bryan Olson wrote:
>> Not true. Here it is again:
>>
>>      When integers are divided, the result of the / operator is
>>      the algebraic quotient with any fractional part discarded.(87)
>>      If the quotient a/b is representable, the expression
>>      (a/b)*b + a%b shall equal a.
>>      [...]
>>      87) This is often called 'truncation toward zero'
>>
>>      [International Standard ISO/IEC 9899:1999, Section 6.5.5
>>      Multiplicative operators, Paragraph 6 and footnote 87]


> But C was around for a long time before the 1999 standard.  C89,
> commonly called ANSI C, is still very commonly used in compilers, and
> K&R C goes back to 1972.  Is truncation toward 0 the standard for K&R C
> as well? 

As I remember, the behaviour for negative 'a' wasn't specified in K&R C
or in C89; the rule was tightened up for C99.

-M-



From kyosohma at gmail.com  Wed Sep 12 09:20:54 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 12 Sep 2007 13:20:54 -0000
Subject: Sea-or-land test
In-Reply-To: <1189598084.622653.94590@50g2000hsm.googlegroups.com>
References: <1189598084.622653.94590@50g2000hsm.googlegroups.com>
Message-ID: <1189603254.821828.296380@k79g2000hse.googlegroups.com>

On Sep 12, 6:54 am, kpalamartch... at gmail.com wrote:
> Could you advise if there exists a simple package, containing function
> that would take geographic coordinates and return information on
> whether this point belongs to land or sea? No great accuracy is needed
> -- I am interested in just major features, like those seen on coarse
> world maps.

This may be of use to you: http://cheeseshop.python.org/pypi/geopy

or http://blog.case.edu/bmb12/2006/09/geocoding_tools_for_python_and_caseclasses

Should be helpful anyway.

Mike



From chris.olekas at gmail.com  Tue Sep 11 13:26:43 2007
From: chris.olekas at gmail.com (Chris)
Date: Tue, 11 Sep 2007 10:26:43 -0700
Subject: Excel process still running after program completion.
In-Reply-To: <mailman.394.1189529975.2658.python-list@python.org>
References: <1189525558.721174.198370@19g2000hsx.googlegroups.com>
	<mailman.394.1189529975.2658.python-list@python.org>
Message-ID: <1189531603.894247.218710@r29g2000hsg.googlegroups.com>

On Sep 11, 12:59 pm, "Hamilton, William " <wham... at entergy.com> wrote:
> > From: Chris
>
> > I have a python script that is driving Excel and using the win32com
> > module. However, upon program completion there's still an Excel.exe
> > process running in the background that I must terminate through Task
> > Manager. Reading up on other threads indicate that maybe I still have
> > some Excel objects referenced within my code. Is this why the process
> > doesn't terminate?
>
> > The related (I hope) parts of my code is here.
>
> > x1App = Dispatch("Excel.Application")
> > Book1 = x1App.Workbooks.Open(ExcelLogPath+"\\outputLog-template.xls")
> > x1App.Visible = 1
> > for sheets in Book1.Worksheets:
> >              if sheets.Name == file_name:
> >                       sheetExists = True
> > if sheetExists != True:
> >              activeSheet =
> > Book1.Worksheets.Add(After=Book1.Worksheets(1))
> >              activeSheet.Name = file_name
> >              testNum[file_name] = 0
> > Book1.Worksheets(file_name).Select()
> > Book1.ActiveSheet.Cells(1+(testNum[file_name]*20),1).Value = "Original
> > File Name"
> > Book1.ActiveSheet.Cells(2+(testNum[file_name]*20),1).Value =
> > file_name
> > Book1.ActiveSheet.Pictures().Insert(output).Select()
> > Book1.SaveAs(Filename=path)
> > x1App.ActiveWorkbook.Close(SaveChanges=0)
> > x1App.Quit()
> > del x1App
> > del Book1
> > del activeSheet
>
> > What am I missing?
>
> In my Excel projects, I terminate it with:
>
> xlBook.Close()
> xlApp.Quit()
>
> I haven't had a problem with Excel staying open after the program ends.
>
> (On a tangent, I want to find the person who thought it was a good idea
> to use the same symbol in a font for 1, l, and I and do some unpleasant
> things.)
>
> --
> -Bill Hamilton

That doesn't really fix the problem as I'm pretty sure its identical
code for
x1App.ActiveWorkbook.Close(SaveChanges=0)

I think where my problem lies is within my for each loop where I
search to see if the worksheet with the name already exists
for sheets in Book1.Worksheets:
     if sheets.Name == file_name:
           sheetExists = True


Since I'm assuming that it creates objects for each of the sheets and
I don't delete them...



From ratchetgrid at googlemail.com  Sun Sep  2 13:57:21 2007
From: ratchetgrid at googlemail.com (Nathan Harmston)
Date: Sun, 2 Sep 2007 18:57:21 +0100
Subject: Adding attributes stored in a list to a class dynamically.
Message-ID: <676224240709021057y6dc9a51aie2f9bb553c3a6d19@mail.gmail.com>

Hi,

Sorry if the subject line of post is wrong, but I think that is what
this is called. I want to create objects with

class Coconuts(object):
    def __init__(self, a, b, *args, **kwargs):
      self.a = a
      self.b = b

def spam( l )
   return Coconuts( l.a, l.b, l.attributes )

l in a parse line of a file which is a tuple wrapped with
attrcol......with attributes a, b and attributes (which is a list of
strings in the format key=value ie...
       [ "id=bar", "test=1234", "doh=qwerty" ]  ).

I want to add attributes to Coconuts so that I can do
print c.id, c.test, c.doh

HOwever I m not sure how to do this:

how can i assign args, kwargs within the constructor of coconuts and
how can I deconstruct the list to form the correct syntax to be able
to be used for args, kwargs.

HOpe this makes sense,

Thanks in advance,

Nathan


From aine_canby at yahoo.com  Mon Sep 24 07:12:46 2007
From: aine_canby at yahoo.com (aine_canby at yahoo.com)
Date: Mon, 24 Sep 2007 04:12:46 -0700
Subject: sorting a list numbers stored as strings
Message-ID: <1190632366.863711.100680@y42g2000hsy.googlegroups.com>

hi,

I have the following list -

["1", "11", "2", "22"]

how do I sort it like this -

["1", "2", "11", "22"]

thanks,

aine



From panguohualove at sina.com  Sat Sep 29 22:24:07 2007
From: panguohualove at sina.com (panguohua)
Date: Sat, 29 Sep 2007 19:24:07 -0700
Subject: earn $26800 a month with google adsense
Message-ID: <1191119047.330796.246600@22g2000hsm.googlegroups.com>

www.space666.com


sport news and make money



From blackmh at gmail.com  Sun Sep  2 19:40:29 2007
From: blackmh at gmail.com (Kveldulv)
Date: Sun, 02 Sep 2007 23:40:29 -0000
Subject: Glade + Python = No GUI
In-Reply-To: <1188760969.316987.214410@w3g2000hsg.googlegroups.com>
References: <1188750465.530463.271750@22g2000hsm.googlegroups.com>
	<46db09e1$0$7697$9b4e6d93@newsspool2.arcor-online.net>
	<1188760969.316987.214410@w3g2000hsg.googlegroups.com>
Message-ID: <1188776429.469599.74480@d55g2000hsg.googlegroups.com>

Note to myself and python noobs like me:
Don't forget to set Visible to yes on main window in Glade :)





From andre.ditador9999 at gmail.com  Mon Sep 17 17:11:53 2007
From: andre.ditador9999 at gmail.com (Andre P.S Duarte)
Date: Mon, 17 Sep 2007 21:11:53 -0000
Subject: =?iso-8859-1?q?Re:_I=B4m_trying_to_desenvolve_a_site_in_python?=
In-Reply-To: <mailman.671.1190059650.2658.python-list@python.org>
References: <1190051850.198096.258890@o80g2000hse.googlegroups.com>
	<5l7uglF6kto9U1@mid.individual.net>
	<1190053707.193010.159350@n39g2000hsh.googlegroups.com>
	<mailman.671.1190059650.2658.python-list@python.org>
Message-ID: <1190063513.429061.13970@d55g2000hsg.googlegroups.com>

On 17 set, 17:08, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Mon, 17 Sep 2007 15:28:27 -0300, Arnaud Delobelle
> <arno... at googlemail.com> escribi?:
>
> > On Sep 17, 7:14 pm, Bjoern Schliessmann <usenet-
> > mail-0306.20.chr0n... at spamgourmet.com> wrote:
> >> Andre P.S Duarte wrote:
> >> > I?m trying to desenvolve a site in python.
>
> >> What does "desenvolve" mean? By "site", do you mean a web site?
>
> > "desenvolver" is a spanish verb meaning "to develop".
>
> Yes, but more likely the OP has a Portuguese/Brazilian origin, and the
> word exists in that language too.
> Going on topic, a good starting point is  http://wiki.python.org/moin/WebFrameworks
>
> --
> Gabriel Genellina

txs it?s helped a lot!! Yes i?m brazilian. sorry for the bad english
lol



From apardon at forel.vub.ac.be  Mon Sep  3 06:31:12 2007
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 3 Sep 2007 10:31:12 GMT
Subject: Does shuffle() produce uniform result ?
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
	<mailman.243.1187955760.32294.python-list@python.org>
	<tooru_honda-7C82D1.10432725082007@wvnews01.netvigator.com>
	<tooru_honda-58C552.20355225082007@wvnews01.netvigator.com>
	<tooru_honda-978B9E.11304526082007@wvnews01.netvigator.com>
Message-ID: <slrnfdnojg.inr.apardon@rcpc42.vub.ac.be>

On 2007-08-26, tooru honda <tooru_honda at fast-mail.org> wrote:
> By incorporating Alex's code, I got another performance boost of 20%.  
> It is mostly due to Alex's more efficient implementation of block random 
> than my own version.

If I understand correctly that you are using urandom as a random
generator I wouldn't trust too much on this performance. Urandom
uses the systemwide entropy-pool. If other programs need this pool
too, your performance can drop spectaculary. If you are using a linux
machine just try to execute "od -x /dev/random" at the same time
as your program.

-- 
Antoon Pardon


From ricaraoz at gmail.com  Mon Sep  3 06:28:45 2007
From: ricaraoz at gmail.com (=?UTF-8?B?UmljYXJkbyBBcsOhb3o=?=)
Date: Mon, 03 Sep 2007 07:28:45 -0300
Subject: advice about `correct' use of decorator
In-Reply-To: <op.tx2felgfx6zn5v@a98gizw.cpe.telecentro.net.ar>
References: <46C4B097.4080309@fmed.uba.ar>	<740c3aec0708170529s6f7e7fe2l8c92771c2d0a51d4@mail.gmail.com>	<46C5C9AE.5020508@fmed.uba.ar>	<mailman.112.1187787625.32294.python-list@python.org>	<1187792001.935204.42330@e9g2000prf.googlegroups.com>	<740c3aec0708230520h6a92a29ar180efed41730f563@mail.gmail.com>	<op.txjpo7ixx6zn5v@gabriel2.softlabbsas.com.ar>	<740c3aec0708290332k3c125d9el16250939e22ea8c4@mail.gmail.com>
	<op.tx2felgfx6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <46DBE1DD.2070405@bigfoot.com>

Gabriel Genellina wrote:
> En Wed, 29 Aug 2007 07:32:21 -0300, BJ?rn Lindqvist <bjourne at gmail.com>  
> escribi?:
> 
>> On 8/24/07, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>>> En Thu, 23 Aug 2007 09:20:21 -0300, BJ?rn Lindqvist <bjourne at gmail.com>
>>> escribi?:
>>>
>>>> def check_user_logged_in(func):
>>>>     def f(*args, **kwargs):
>>>>         if global_state.the_user.is_logged_in:
>>>>             return func(*args, **kwargs)
>>>>         return show_login_page()
>>>>     return f
>>> I think there is a semantic problem, perhaps we are not talking
>>> about the same thing. I'm considering the software complexity AS
>>> PERCEIVED BY THE PROGRAMMER, looking at the interactions between a
>>> program and a programmer who is working on some task; some people
>>> would say "cognitive complexity" to make it clear.
>> There is no semantic problem. You are just mistaken in your belief
>> that the complexity that the user of the decorator has to deal with is
>> different from the complexity in implementing the decorator.
> 
> But they ARE different. That's the whole point of abstractions, code  
> reuse, layered design... Designing a simple interfase on top of a complex  
> system is very common. Nobody writes X-Window code, as nobody writes a raw  
> event loop for Windows anymore: there are very good GUI toolkits, even  
> portable frameworks, that put an abstract layer on top of that so the  
> programmer has a much simple and coherent view. The complexity is behind  
> the scenes.
> 
>>> Which API is more complex: one in which you can play a movie with
>>> just a single call like PlayMovie(Title), or one on which you must
>>> call a zillion functions to firtly initialize the stream format,
>>> configure the display, disable undesired user interfase elements,
>>> locate the movie file, load it in chunks, etc.? The first one is
>>> certainly much simpler to use (simpler = less complex), and maybe
>>> internally it calls the same functions as the second one, but nobody
>>> cares.
>> "nobody cares" is your guess. I'd bet that the caller of the PlayMovie
>> function cares a lot: Is the movie played full screened? Which
>> encodings are supported? Can you set the title of the movie window? Is
>> streaming supported? Does it even work on windows? Which URI schemes
>> does it support?  And so on and so on.
>>
>> That is why no video decoding API:s have a PlayMovie(Title) function
>> and why I haven't seen a single 3d engine with a
>> MakeReallyCoolDoomCloneFPSGame() function.
> 
> (yet!). What about urlopen? Using a single call one can be authenticated  
> and retrieve any file in the other side of the planet. I consider it a  
> simple interfase, altough it does complex things. Would you say it is  
> better to use plain sockets everywhere? Or, since sockets are abstractions  
> themselves, would you say it is better to use lower level primitives  
> instead? Each time you descend a level, you have to use many simpler  
> functions - but their combination is more complex.
> 
>> "hiding details" only works if the client programmer really doesn't
>> care about the details.
> 
> Why should he care? Isn't "hiding implementation details" a good design  
> principle?
> When I use urlopen, I don't even care of the underlying socket  
> implementation. I don't care which interfase the request is sent thru. I  
> don't care if the answer got fragmented and some packets had to be  
> reassembled. urlopen gives me something that looks like a file, and I just  
> read() from it.
> 
>>> Back to your example, the fact that a decorator builds a higher order
>>> function, does NOT make it more complex - because the programmer does  
>>> not
>>> see that. In fact, hiding the details makes it simpler.
>> Yes, the programmer does see that. The example decorator I posted
>> requires about a zillion preconditions to work correctly and will fail
>> in weird ways when those preconditions are not satisfied. The
>> programmer is interested in the crazy failures he or she will
>> experience. I dare you to try and implementing the code both as a
>> decorator and as a function, then write the unit tests and
>> documentation. The complexity of those three items together
>> (implementation + tests + documentation) will be much higher for the
>> decorator choice because the complexity of the decorator
>> implementation is a bit higher than using a plain old function.
> 
> Testing the decorator is as hard as testing any other function. Testing  
> the decorated functions might involve *only* checking if the decorator is  
> actually used for those functions.
> Going to your posted example, I don't see the difference - I should say, I  
> don't see the advantage. Using a decorator hides some implementation  
> details and reduces coupling between modules, both good things on "my"  
> book; your function with no decorator does quite the opposite, and doesn't  
> look like good coding style (on "my" book, of course).
> 
>> Note also that it is extremely rare to see well-documented or
>> well-tested code, which means that the programmer WILL have to analyze
>> the implementation which means that implementation complexity matters
>> a lot.
> 
> In any case, that would require testing and analyzing ONE function (the  
> decorator) instead of inspecting a zillion repetitions of the same code  
> that, when being wrong, have to be located and fixed on all those places.
> 
> Really, I still can't understand how you can defend such silly things -  
> unless we are talking about different things.
> 


FACADE

Intent : Provide a unified interface to a set of interfaces in a
subsystem. Facade defines a higher-level interface that makes the
subsystem easier to use.

GoF Design Patterns. pp.185








From rbonvall at gmail.com  Mon Sep 24 16:44:07 2007
From: rbonvall at gmail.com (Roberto Bonvallet)
Date: Mon, 24 Sep 2007 13:44:07 -0700
Subject: Nested For and While Statements
In-Reply-To: <1190662087.403000.16290@g4g2000hsf.googlegroups.com>
References: <1190662087.403000.16290@g4g2000hsf.googlegroups.com>
Message-ID: <1190666647.199890.174670@o80g2000hse.googlegroups.com>

On Sep 24, 3:28 pm, kou... at hotmail.com wrote:
> [...] where I start getting some errors.
> I'm hoping I won't have to post my code

"Doctor, I'm feeling bad.  I hope I won't have to tell you my
symptoms.  What do I have?"

Please provide the actual errors and the actual code.  It is easier,
less error prone and more useful to copy and paste them instead of
writing some pseudocode.  Maybe the repeated index i is a typo you
made when writing this post and the original code is correct, but we
don't have any way to know that.

--
Roberto Bonvallet



From jstroud at mbi.ucla.edu  Mon Sep 17 01:35:36 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 16 Sep 2007 22:35:36 -0700
Subject: Python statements not forcing whitespace is messy?
In-Reply-To: <mailman.606.1189946595.2658.python-list@python.org>
References: <1189884110.006272.240840@50g2000hsm.googlegroups.com>	<mailman.589.1189887114.2658.python-list@python.org>	<1189890755.870694.29790@r29g2000hsg.googlegroups.com>	<mailman.594.1189893054.2658.python-list@python.org>	<fchku3$n6e$1@daisy.noc.ucla.edu>
	<46ec6826$1@news.eftel.com.au>	<fci05d$ohj$1@sea.gmane.org>
	<mailman.606.1189946595.2658.python-list@python.org>
Message-ID: <WgoHi.3337$Sd4.2613@nlpi061.nbdc.sbc.com>

Peter Decker wrote:
> On 9/15/07, Steve Holden <steve at holdenweb.com> wrote:
>> John Machin wrote:
>>> On 16/09/2007 8:11 AM, James Stroud wrote:
>>>> Steve Holden wrote:
>>>>> I don't know why you have a bug up your ass about it, as the
>>>>> Americans say.
>>>> I think most Americans say "wild hare up your ass".
> 
>> I guess I got the metaphor wrong?
> 
> Maybe it's a Southern US thing. I've always heard "bug" used; somehow
> it doesn't seem that a wild hare would fit!
> 

We say "wild hare" down in Texas. I think I've heard "bug" before, but I 
wanted an excuse to vent about the hair v. hare issue in some of these 
American idioms. I guess I have a <insert idiom here> about it.

James


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Sep 21 06:42:58 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 21 Sep 2007 12:42:58 +0200
Subject: Odd files; just left behind?
In-Reply-To: <mailman.860.1190367290.2658.python-list@python.org>
References: <mailman.760.1190205969.2658.python-list@python.org>	<878x725ts7.fsf@pobox.com>	<46F191DF.7000908@jessikat.plus.net>	<46f2bd9b$0$20143$426a74cc@news.free.fr>
	<mailman.860.1190367290.2658.python-list@python.org>
Message-ID: <46f3a032$0$26141$426a74cc@news.free.fr>

Robin Becker a ?crit :
> Bruno Desthuilliers wrote:
>> Robin Becker a ?crit :
>>> John J. Lee wrote:
>>>
>>>> Robin Becker <robin at reportlab.com> writes:
>>>>
>>>>> I see a folder .python-eggs in my home directory on one of our servers
>>>>> with various .so files
>>>>>
>>>>> ~/.python-eggs/MySQL_python-1.2.2-py2.3-freebsd-6.1-SECURITY-i386.egg-tmp/_mysql.so 
>>>>>
>>>>>
>>>>> are these just left behind from some install process?
>>>>
>>>> Ah, it's about the resource extraction feature of setuptools.  It's
>>>> possible for zipped eggs to contain resources that have to be
>>>> extracted to the filesystem.  It puts them in the directory you saw
>>>> (or somewhere else -- see the docstring in my other reply).
>>>>
>>>> http://peak.telecommunity.com/DevCenter/PkgResources#resource-extraction 
>>>>
>>>> http://peak.telecommunity.com/DevCenter/setuptools#automatic-resource-extraction 
>>>>
>>> .....
>>> Thanks John, but why not clean up?
>>>
>> Does it needs to be "cleaned up" ? .so files (shared libs) *need* to 
>> be extracted from the egg to be usable. Where they are extracted is 
>> IIRC configurable...

> You're right! These files aren't temporary?



> It seems strange that the 
> python files live with their associated lib/site-packages and the .so 
> files are somewhere entirely different.

IIRC, where .so files are extracted is configurable using 
PYTHON_EGG_CACHE (cf the first link above).

> Python 2.3.6 (#1, Jun  7 2007, 10:44:52)
> [GCC 3.4.4 [FreeBSD] 20050518] on freebsd6
> Type "help", "copyright", "credits" or "license" for more information.
>  >>> import MySQLdb
>  >>> print MySQLdb.__file__
> /myhome/PYTHON/lib/python2.3/site-packages/MySQL_python-1.2.2-py2.3-freebsd-6.1-SECURITY-i386.egg/MySQLdb/__init__.pyc 
 >
>  >>> import _mysql
>  >>> print _mysql.__file__
> /myhome/.python-eggs/MySQL_python-1.2.2-py2.3-freebsd-6.1-SECURITY-i386.egg-tmp/_mysql.so 


>  >>>
> 
> it would seem simpler to have the .so files inside the site-packages and 
> there's the question of why this folder has to be obfuscated (name 
> starts with .). Even if these files are "resources" why should they be 
> assumed to belong to the user?

Notice that you did install your lib/python in /myhome, not in /usr[/local]

(snip)
> Just another nonsense from the eggworld

Or just another example of not reading the FineManual(tm) ?


From rzantow at gmail.com  Sat Sep  8 13:33:20 2007
From: rzantow at gmail.com (rzed)
Date: Sat, 08 Sep 2007 17:33:20 +0000
Subject: startswith( prefix[, start[, end]]) Query
References: <1189087752.538726.101350@r29g2000hsg.googlegroups.com>
	<46e00d7e$0$16413$426a74cc@news.free.fr>
	<mailman.156.1189092591.2658.python-list@python.org>
	<Xns99A45CD3825D7duncanbooth@127.0.0.1>
Message-ID: <Xns99A589E6E6CE1rzantowgmailcom@208.49.80.253>

Duncan Booth <duncan.booth at invalid.invalid> wrote in
news:Xns99A45CD3825D7duncanbooth at 127.0.0.1: 

I went through your example to get timings for my machine, and I 
ran into an issue I didn't expect.

My bat file did the following 10 times in a row:
(the command line wraps in this post)

call timeit -s "s='abracadabra1'*1000;t='abracadabra2';
    	startswith=s.startswith" startswith(t)
... giving me these times:

1000000 loops, best of 3: 0.483 usec per loop
1000000 loops, best of 3: 0.49 usec per loop
1000000 loops, best of 3: 0.489 usec per loop
1000000 loops, best of 3: 0.491 usec per loop
1000000 loops, best of 3: 0.488 usec per loop
1000000 loops, best of 3: 0.492 usec per loop
1000000 loops, best of 3: 0.49 usec per loop
1000000 loops, best of 3: 0.493 usec per loop
1000000 loops, best of 3: 0.486 usec per loop
1000000 loops, best of 3: 0.489 usec per loop

Then I thought that a shorter name for the lookup might affect the 
timings, so I changed the bat file, which now did the following 10 
times in a row:

timeit -s "s='abracadabra1'* 1000;t='abracadabra2';
 	sw=s.startswith" sw(t)

... giving me these times:
1000000 loops, best of 3: 0.516 usec per loop
1000000 loops, best of 3: 0.512 usec per loop
1000000 loops, best of 3: 0.514 usec per loop
1000000 loops, best of 3: 0.517 usec per loop
1000000 loops, best of 3: 0.515 usec per loop
1000000 loops, best of 3: 0.518 usec per loop
1000000 loops, best of 3: 0.523 usec per loop
1000000 loops, best of 3: 0.513 usec per loop
1000000 loops, best of 3: 0.514 usec per loop
1000000 loops, best of 3: 0.515 usec per loop

In other words, the shorter name did seem to affect the timings, 
but in a negative way. Why it would actually change at all is 
beyond me, but it is consistently this way on my machine. 

Can anyone explain this?

-- 
rzed


From ldo at geek-central.gen.new_zealand  Sat Sep 22 17:24:24 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sun, 23 Sep 2007 09:24:24 +1200
Subject: An Editor that Skips to the End of a Def
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk> <fd0au1$fro$1@lust.ihug.co.nz>
	<5lhs4pF8bkunU1@mid.individual.net>
Message-ID: <fd4168$ige$1@lust.ihug.co.nz>

In message <5lhs4pF8bkunU1 at mid.individual.net>, Bjoern Schliessmann wrote:

> Lawrence D'Oliveiro wrote:
>
>> After two decades of putting up with vi just to ensure
>> compatibility with every proprietary *nix system I might come
>> across, let me just say ...
>> 
>> USE EMACS!
> 
> Nah. Use vim.

Every other text editor I have ever used understands that the current
position in a file is _between_ two characters (or before the first
character, or after the last character), not _on_ a character. But not vi
and its ilk.

Try the following in vi/vim: Move to some point in the middle of a line.
Press "i" to get into insert mode. Press escape to get out again. You'll
end up one position to the left of where you were before. Press "i", and
then escape again--you've moved another position left. Why is it incapable
of keeping track of such a simple thing as your current position in the
file?

Why does it need two different insert commands, "i" versus "a"? Because one
of them can't insert at the end of a line, and the other can't insert at
the beginning.

And why have command-versus-insert mode at all? No other text editor still
surviving uses such an antiquated concept.


From lasses_weil at klapptsowieso.net  Sat Sep  8 23:01:07 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Sun, 09 Sep 2007 05:01:07 +0200
Subject: Parsing nested constructs
In-Reply-To: <1189296638.625012.286250@k79g2000hse.googlegroups.com>
References: <46e308d3$0$9153$426a74cc@news.free.fr>
	<1189296638.625012.286250@k79g2000hse.googlegroups.com>
Message-ID: <46e361f3$0$7695$9b4e6d93@newsspool2.arcor-online.net>

Paul McGuire wrote:
> Well, it is an external module, but pyparsing makes this pretty
> straightforward:
> 
> [snip delightful parsing]
> 
Again pyparsing to the rescue :)

I have to do a parsing project in Java right now and I dearly miss 
pyparsing. I explained it to the guy I'm working for, and he was pretty 
impressed.

Thought that might make you smile.

/W


From f.guerrieri at gmail.com  Mon Sep 10 06:06:03 2007
From: f.guerrieri at gmail.com (Francesco Guerrieri)
Date: Mon, 10 Sep 2007 12:06:03 +0200
Subject: less obvious "super"
In-Reply-To: <1189417830.645749.226120@d55g2000hsg.googlegroups.com>
References: <1189417830.645749.226120@d55g2000hsg.googlegroups.com>
Message-ID: <79b79e730709100306w2fd7b8cai54550434f92c891c@mail.gmail.com>

On 9/10/07, Nagarajan <naga86 at gmail.com> wrote:
>
> Hi group,
> I am confused with "super" usage..It seems to be complicated and less
> obvious.
> Here is what I need to achieve..
>
> class A :
>     def __init__( self ):
>         self.x  = 0
>
> class B ( A ):
>     def __init__( self, something ):
>         # Use "super" construct here so that I can "inherit" x of A
>         self.y  = something
>
> How should I use "super" so that I could access the variable "x" of A
> in B?
>


You don't need to use super in this case. You just have to remember to
explicitly initialize the classes you are deriving from. In this case,

class B(A):
    def __init__(self, something):
        A.__init__(self)
        self.y = something

bye,
francesco
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From half.italian at gmail.com  Thu Sep 13 04:42:35 2007
From: half.italian at gmail.com (half.italian at gmail.com)
Date: Thu, 13 Sep 2007 08:42:35 -0000
Subject: Python+Expect+Win32 = Not Possible?
In-Reply-To: <1189657637.539038.317280@k79g2000hse.googlegroups.com>
References: <1189657637.539038.317280@k79g2000hse.googlegroups.com>
Message-ID: <1189672955.321701.164050@57g2000hsv.googlegroups.com>

On Sep 12, 9:27 pm, gamename <namesagame-use... at yahoo.com> wrote:
> Hi,
>
> Is it still the case there is no practical Expect-like module for
> win32? I know that cygwin can support pexpect, but that isn't an
> option here --- I have to use a native win32 Python version.
>
> Are there alternatives, or is it simply not an option to replicate
> Expect on win32 with python?
>
> All I'm trying to do is start a couple processes, wait for each to say
> "done" on stdout and then quit (or timeout if something went wrong).
>
> TIA,
> -T

I had planned on using telnet to do the same thing on windows.  I
don't think I ever proved it, but I'm pretty sure it will work.

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52228

~Sean



From laurent.pointal at limsi.fr  Thu Sep 13 04:43:18 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Thu, 13 Sep 2007 10:43:18 +0200
Subject: read part of jpeg file by pure python
In-Reply-To: <1189671634.712690.154580@o80g2000hse.googlegroups.com>
References: <1189671634.712690.154580@o80g2000hse.googlegroups.com>
Message-ID: <fcat76$vnc$1@news2.u-psud.fr>

Pacino a ?crit :
> Hi, everyone,
> 
> I am wondering whether it's possible to read part (e.g. 1000*1000) of
> a huge jpeg file (e.g. 30000*30000) and save it to another jpeg file
> by pure python. I failed to read the whole file and split it, because
> it would cost 2GB memory.
> 
> Can anyone help me? Any comments would be appreciated.
> 
> Thanks.
> 
> Robert
> 

Just reading parts of the *file* is easy (see tell() seek() and read()
methods on files).
But to extract a part of the *picture*, you must uncompress the picture
in memory, grab the sub-picture, and save it back - generally with
compression. I can't see how you can bypass the uncompress/compress
phases and the corresponding memory use.

A+

Laurent.


From bdesth.quelquechose at free.quelquepart.fr  Sun Sep  2 13:56:15 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 02 Sep 2007 19:56:15 +0200
Subject: TypeError: 'module object is not callable'
In-Reply-To: <1188836008.656284.76160@o80g2000hse.googlegroups.com>
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<mailman.315.1188810174.28954.python-list@python.org>
	<46dbd11e$0$6228$426a74cc@news.free.fr>
	<mailman.317.1188812089.28954.python-list@python.org>
	<1188816626.021956.281040@22g2000hsm.googlegroups.com>
	<5k2cjmF1r2aiU1@mid.uni-berlin.de>
	<1188836008.656284.76160@o80g2000hse.googlegroups.com>
Message-ID: <46dc6f49$0$6207$426a34cc@news.free.fr>

christophertidy at hotmail.com a ?crit :
(snip)
> 
> I have another little question before I finish today:
> I am currently struggling to use a global variable in my static
> functions. I'll explain further
> 
> Within my main.py file I have
> 
> class Main(object):
>     stepStore = StepStore()
> 
>     @staticmethod
>     def createDepSteps():
>         ....
>         stepStore.addStep([bol7, pre5])
>         .......
> 
>     @staticmethod
>     def processSteps():
>         for step in stepStore.stepList[:]:
>         ......
> 
> Main.createDepSteps()
> Main.processSteps()
> 
(snip)

Marc and Diez already gave you the good answers on this (basically: get 
rid of useless classes, and use plain functions instead of 
staticmethods). I'd just add a couple comments:

First point: OO is not about classes, it's about objects - FWIW, the 
mere concept of 'class' is nowhere in the definition of OO, and some 
OOPLs don't even have that concept (cf Self and Javascript).

Second point : in Python, everything (well... almost - at least 
everything that can be bound to a name) is an object. So Python's 
modules and functions are objects.

Third point : "top-level" (aka 'module level', aka 'globals') names 
(names defined outside classes or functions) are in fact module 
attributes. So, to make a long story short, you can consider a module as 
a kind of a singleton.

What I wanted to point out here is that there's much more to OO than 
what one learns with Java - and, FWIW, much more to Python's object 
model than what it may seems at first.

Ah, and, BTW : welcome here !-)


From stefan.arentz at gmail.com  Thu Sep  6 04:47:52 2007
From: stefan.arentz at gmail.com (Stefan Arentz)
Date: 06 Sep 2007 10:47:52 +0200
Subject: We need PIGs :)
References: <mailman.131.1188450658.28954.python-list@python.org>
	<46d74472$0$402$426a34cc@news.free.fr>
	<87hcm81dot.fsf@kip.sateh.com> <5k9qpsF2mrncU3@mid.uni-berlin.de>
Message-ID: <877in418p3.fsf@kip.sateh.com>

Marc 'BlackJack' Rintsch <bj_666 at gmx.net> writes:

> On Thu, 06 Sep 2007 09:00:02 +0200, Stefan Arentz wrote:
> 
> > What I find really frustrating in Python (combined with usually bad
> > documentation) is that many people have different styles. The most
> > frustratinng being getFoo() vs .foo, vs get_foo().
> 
> `getFoo()` is discouraged by PEP 8.  You don't have the choice between
> `.foo` and `.get_foo()` in Java because Java has no properties and people
> are trained to write getters and setters for everything.  I like that
> choice in Python because I can write shorter code that is not cluttered
> with very simple getters and setters.

I like that too, but unfortunately not everybody is doing
it. Unpredictable code (apis) is in my opinion the biggest
productivity killer.

 S.



From jjl at pobox.com  Thu Sep 20 15:13:54 2007
From: jjl at pobox.com (John J. Lee)
Date: Thu, 20 Sep 2007 19:13:54 GMT
Subject: An Editor that Skips to the End of a Def
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
Message-ID: <87odfxjgjy.fsf@pobox.com>

"W. Watson" <wolf_tracks at invalid.com> writes:

> Thanks, but no thanks. The learning curve is way too steep.
[...]

Eclipse must be able to do this.

Eclipse is emacs for stupid people ;-)

Seriously for a moment, I read something recently (maybe here?) about
an Apple study that claimed to show that people who perceived keyboard
bindings as being much faster than mouseing did not, on average, take
less time to complete the actions that were studied (they took more
time, in fact).  The plausible explanation for this was that people's
subjective perception of time is affected by the greater mental work
involved in typing (as opposed to mousing) for a given action.

I suspect the reality is at neither extreme (nor "somewhere in the
middle").


John


From AnonMail2005 at gmail.com  Wed Sep  5 18:05:04 2007
From: AnonMail2005 at gmail.com (AnonMail2005 at gmail.com)
Date: Wed, 05 Sep 2007 15:05:04 -0700
Subject: Registering a python function in C
In-Reply-To: <1188861109.041382.178950@d55g2000hsg.googlegroups.com>
References: <1188508874.879215.319400@i13g2000prf.googlegroups.com>
	<1188516423.744038.309700@z24g2000prh.googlegroups.com>
	<1188588784.764658.317570@r34g2000hsd.googlegroups.com>
	<1188592047.542946.249520@57g2000hsv.googlegroups.com>
	<1188861109.041382.178950@d55g2000hsg.googlegroups.com>
Message-ID: <1189029904.265510.185540@22g2000hsm.googlegroups.com>

On Sep 3, 7:11 pm, fernando <fernandofariajun... at gmail.com> wrote:
> > Is Maya a different python build than what is contained at python.org?
> > If so, I suggest you get your C program to work with the latest python
> > build
> > from python.org.  Then see if you can get it to work with the Maya
> > version.
>
> Ok, did that. If I write a normal C++ program and use the python
> installed in my system, everything works ok and I can call the python
> funtions. From within maya(where the C code is running as a plugin),
> nothing happens. I tried removing my python installation so that only
> the one that comes with maya is running, but then I have no python.h
> or libs to compile against!! I found no help at the maya/python
> newsgroup, is there anyone who has done this before???
>
> Thanks for all the help!

>From what I understand, it seems like maya includes a python build/
download
when you download maya.

You should be able to get the libs and include files from there.  It
also
looks like maya explicitly says what python build it uses when it is
started up interactively.

I would bet that your installation of maya and your (different)
installation of
python are conflicting.



From henriklied at gmail.com  Thu Sep 27 05:14:07 2007
From: henriklied at gmail.com (Henrik Lied)
Date: Thu, 27 Sep 2007 09:14:07 -0000
Subject: "No backend servers available" using httplib
Message-ID: <1190884447.792688.107710@g4g2000hsf.googlegroups.com>

Hi there!

I'm using a recipe found on ASPN [1] to upload some data to an
external server.

The request fails, and all I get in response is "No backend servers
available".

So I'm wondering: Is this a known exception-message in httplib, or
could it be an error in the requested external resource?

[1]: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/146306

-----
Thanks,
Henrik



From newsuser at stacom-software.de  Tue Sep 25 09:23:51 2007
From: newsuser at stacom-software.de (Alexander Eisenhuth)
Date: Tue, 25 Sep 2007 15:23:51 +0200
Subject: PyQt disconnect signal / slot
Message-ID: <fdb257$lra$1@online.de>

Hello PyQt experts,

do i have to disconnect all signal/slots, after the emitting object is deleted, 
or does it the QObject destructor?

Thanks
Alexander


From pyth0nc0d3r at gmail.com  Sat Sep  1 18:03:57 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Sat, 1 Sep 2007 17:03:57 -0500
Subject: Windows Media Player Playlist
Message-ID: <eb79828c0709011503gb887d0fwe870efb6de6292cd@mail.gmail.com>

Is it possible to use python to get the current playlist of the current
playing songs from Windows Media Player or Windows Player Classic?
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From sharinginfo4 at gmail.com  Wed Sep 26 09:06:38 2007
From: sharinginfo4 at gmail.com (Laptop secret)
Date: Wed, 26 Sep 2007 13:06:38 -0000
Subject: The Big Secret inside your Laptop /Computer
Message-ID: <1190811998.697399.223470@k79g2000hse.googlegroups.com>

HI,

We may not aware that the laptop you bring around has abig secret
inside.
Some of expert may have known it and keep it as secret. If you are
fond of browsing in internet you may probably discover it.

Read further thru this site and you may find out :

http://sharinginfo4.googlepages.com/home

Have a great time then,
Steven



From steve at holdenweb.com  Mon Sep 17 14:20:10 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 17 Sep 2007 14:20:10 -0400
Subject: Try this
In-Reply-To: <1190051875.433350.150820@50g2000hsm.googlegroups.com>
References: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>	<13eqsdfsfvsa16f@corp.supernews.com>	<1189969529.652871.19280@50g2000hsm.googlegroups.com>	<mailman.621.1189970593.2658.python-list@python.org>	<1189979679.969074.216490@y42g2000hsy.googlegroups.com>	<1189981681.745195.18130@y42g2000hsy.googlegroups.com>	<1189983233.709832.124290@19g2000hsx.googlegroups.com>	<1189984913.956999.163100@n39g2000hsh.googlegroups.com>	<1189990689.259451.232570@g4g2000hsf.googlegroups.com>	<mailman.634.1189996018.2658.python-list@python.org>	<1190008502.986300.286280@22g2000hsm.googlegroups.com>	<mailman.646.1190027387.2658.python-list@python.org>
	<1190051875.433350.150820@50g2000hsm.googlegroups.com>
Message-ID: <46EEC55A.9070602@holdenweb.com>

mensanator at aol.com wrote:
> On Sep 17, 6:09 am, Steve Holden <st... at holdenweb.com> wrote:
>> mensana... at aol.com wrote:
>>> On Sep 16, 9:27?pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
>>> wrote:
>>>> En Sun, 16 Sep 2007 21:58:09 -0300, mensana... at aol.com  
>> [...]
>>>> What about the rest of the world that don't speak
>>>> English or even worse, don't use the Latin alpabet?
>>> When the rest of the world creates the next
>>> generation of computers, THEY can chosse the
>>> defaults.
>> Right, because of course US companies have no desire to do business with
>> the rest of the world.
> 
> I'm merely pointing out that it is the legacy of the history of
> information technology that is chauvinistic. That happens to be
> the way things are, I did not say that's the way they should be.
> 
You imply that's the way they should be by placing pre-conditions on the 
  adoption of anything but ASCII as a default.

>> I'm not given to ad hominem attacks, but this remark really seems to
>> indicate that "chauvinistic cretin" might apply to you.
> 
> _I_ didn't invent ASCII or EBCDIC. Why weren't the European
> and Chinese languages considered when these were developed
> 40-50 years ago? Because they were "chauvinistic cretins"?
> Is that what you think?
> 
No. In those days (sixty years ago) less was possible, and achieving 
anything, however limited, represented progress. Certainly it would have 
been nice to see the adoption of more internationally-applicable 
standards, but the codes that were used in the early computes had their 
roots in even earlier information systems like teletypes and telex 
machines. It was partly a matter of adapting what already existed.

In these more enlightened times we can build systems for larger 
audiences by making them applicable to a wider range of languages and 
character sets. The standards and the technology already exist to do so.

So, "chauvinistic" because you appear to require the users of the 
non-ASCII parts of Unicode to contribute something before they get 
systems that suit their needs, when in fact the boot is on the other 
foot and it behooves the manufacturers to adapt to market needs if they 
want to serve those markets.

"Cretin" (in the sense of possessing sub-normal intelligence, as I do 
not know whether or not you have a thyroid deficiency) because you do 
not seem to be able to think of the needs of the larger community, and 
respond to argument with non-sequitur and evasion.

Plus, you annoyed me. I should have restrained myself. Sorry.

>> You'll be gald
>> to know you are unlikely to hear from me again.
> 
> Why? Because I tend to act as a gadfly? To point out that
> the emperor is, in fact, naked? Because the professional
> programming community doesn't like their dirty laundry
> aired in public?
> 
No, because everything you discuss appears to be discussed in the most 
simplistic terms, with limited perspective. So a discussion with you is 
about as satisfying as a discussion with a twelve year old child.

>> Your perception of the development of information technology is so
>> skewed you would be better off knowing nothing.
> 
> My perception is skewed? Why then, does Unicode even exist?
> 
To meet real needs which you appear to feel shouldn't be met until the 
people with those needs have built their own information technologies 
(or in your words "created the next generation of computers.").

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From jjl at pobox.com  Sat Sep 22 03:12:49 2007
From: jjl at pobox.com (John J. Lee)
Date: Sat, 22 Sep 2007 07:12:49 GMT
Subject: UTF-8 characters in doctest
References: <1190202459.229197.297350@n39g2000hsh.googlegroups.com>
	<fcr3u9$l32$03$2@news.t-online.com> <878x71jfwo.fsf@pobox.com>
	<fcvo1o$dg5$03$1@news.t-online.com>
Message-ID: <8764235g26.fsf@pobox.com>

Peter Otten <__peter__ at web.de> writes:
[...]
>> Forgive me if this is a stupid question, but: What purpose does
>> function f serve?
>
> Like the OP's get_inventary_number() it takes a unicode string and
> returns a tuple of unicode strings. I'ts pointless otherwise. I hoped I
> had stripped down his code to a point where the analogy was still
> recognizable.

Ah, right.


John


From steve at REMOVE-THIS-cybersource.com.au  Thu Sep  6 09:18:12 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Thu, 06 Sep 2007 13:18:12 -0000
Subject: concise code (beginner)
References: <13dsvqrqivtf092@corp.supernews.com>
	<13dv4uqqb806ff0@corp.supernews.com>
Message-ID: <13dvvgk96amhhec@corp.supernews.com>

On Thu, 06 Sep 2007 15:44:57 +1000, bambam wrote:

> First, thank you.
> 
> All of the suggestions match what we want to do much better than what we
> are doing. We have a script, written in python, which is doing testing.
> But the python script doesn't look anything like the test script,
> because the python script is written in python, and the test script is a
> series of instrument command macros.
> 
> By putting the script sequence into a collection that is separate from
> the python code, we will get script list that general engineering will
> find much easier to understand:
> 
> 
> def script(self)
>     def a0010(): global self; self.power_on([self.dev]); 
>     def a0020(): global self; self.dev.addLog([self.name, ' started']);
>     def a0030(): global self; self.resetMinuteReg([self.dev]); 
>     def a0040(): global self; self.disablePLmessages([self.dev]); 
>     def a0050(): global self; self.dev.testH.writePLram((PL.BCAL12<<8));

That's rather hideous code, and I'm not sure I understand what it's 
supposed to do. As far as I can tell, you have a function called "script" 
which takes a single argument. It then defines five functions, throws 
them away, and returns None.

"self" is not a reserved word in Python (although perhaps it should 
be...) but it has a VERY strong convention for when to use it: when 
defining instance methods, it is used for the automatically-supplied 
instance argument. The above functions look like they were written by 
somebody who has just copied some methods from another piece of code 
without understanding what they were seeing. (Sorry.)


> Most of these won't generate exceptions: exceptions are expected only on
> the calculations following the reads, but of course the problem is that
> the exceptions are unexpected... 

I don't think so. I think they are expected. You say so yourself.


> The semi-colons were already there,

Fine. Time to remove them.


> I've just stripped out the loops and exception handlers. The original
> code is a mixture of functions with internal and external [dev] loops.
> 
> Because of the sequence names, I have a choice of using generated call
> names (James), or a static list of some sort.
> 
> Other possibilities might be
> 1) Using dir(script) to get a list of line functions 2) Using
> frame.f_lineno instead of line functions 3) Use an expression list
> instead of line functions 4) Multiple script objects with yield on each
> line.

My brain hurts.


> The devices are in a list, and are removed by using pop(i). This messes
> up the loop iteration, so it is actually done by setting a flag on each
> device in the exception handler, with ANOTHER loop after each
> write/read/calculate sequence. I left that out also because I wanted to
> show the intended logic.

Try something like this: define a module holding the device functions. 
Rather than have the functions access a global variable, which is almost 
always a bad thing to do, have them take a single argument.

# module device

__all__ = [a0010, a002, a0030, a0040, a0050]

def a0010(obj):
    obj.power_on([obj.dev])
def a0020(obj):
    obj.dev.addLog([obj.name, ' started'])
def a0030(obj):
    obj.resetMinuteReg([obj.dev])
def a0040(obj):
    obj.disablePLmessages([obj.dev])
def a0050(obj):
    obj.dev.testH.writePLram((PL.BCAL12<<8))


Now define a second module to call those functions.

# module tester

import device
passed = device.__all__[:] # a copy of the list
some_object = Something() # I have no idea what this should be...

for function in device.__all__:
    try:
        function(some_object)
    except Exception, e:
        print e
        passed.remove(function)

print "The following functions passed:"
for function in passed:
    print function


And then I suggest you spend some time reading up about doc tests and 
unit tests.

Hope this helps,



-- 
Steven.



From jjl at pobox.com  Sat Sep 22 14:21:07 2007
From: jjl at pobox.com (John J. Lee)
Date: Sat, 22 Sep 2007 18:21:07 GMT
Subject: frange() question
References: <fctrc1$doh$1@news.nems.noaa.gov> <87tzppjhe4.fsf@pobox.com>
	<mailman.827.1190318121.2658.python-list@python.org>
	<87lkaz40sj.fsf@pobox.com>
	<mailman.927.1190476490.2658.python-list@python.org>
Message-ID: <87odfuwoh8.fsf@pobox.com>

Carsten Haese <carsten at uniqsys.com> writes:

> On Sat, 2007-09-22 at 07:27 +0000, John J. Lee wrote:
>> Carsten Haese <carsten at uniqsys.com> writes:
>> 
>> > On Thu, 2007-09-20 at 18:55 +0000, John J. Lee wrote:
>> >> Functions are never generators, senso stricto.  There are "generator
>> >> functions", which *return* (or yield) generators when you call them.
>> >
>> > Actually, a generator function is a function that returns a generator.
>> 
>> Read what I wrote again.  What makes you begin your sentence with
>> "Actually", rather than "Putting it another way"?
>
> I was attempting to correct your interjection "(or yield)." A generator
> function doesn't yield a generator; it returns a generator that yields
> sequence values.

OK.  There's an obvious second language issue here (the first being
the generator / generator function), which I was trying to draw
attention away from, in the interests of explaining the concept, and
the first language issue.  Probably a bad idea!


> The second half of my post illustrates a difference of opinion about
> what constitutes a generator function. You state that frange() is not a
> generator function because it doesn't use yield, but it behaves like
> one. My point is that it *is* a generator function because the generator
> expression is merely syntactic sugar for an equivalent for/yield loop.

Seems to me that's a definitional thing, with no conceptual content,
so "difference of opinion" seems an odd choice of words.  It would be
nice to nail the definitions down.  Do the Python docs do that?


> Of course, the distinction of whether frange() *is* a generator function
> or merely *behaves* as one is immaterial in practice, and we can both be
> right in the absence of a formal definition of what a generator function
> is. PEP 255 says "A function that contains a yield statement is called a
> generator function," but that was written before generator expressions
> were introduced.

Ah, they do -- thanks.  Though I'm now left puzzled why you express
your "difference of opionion" above...


John


From steve at holdenweb.com  Fri Sep 28 18:16:51 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 28 Sep 2007 18:16:51 -0400
Subject: Python 3.0 migration plans?
In-Reply-To: <1191013033.145194.193040@50g2000hsm.googlegroups.com>
References: <mailman.1195.1190936289.2658.python-list@python.org>	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>	<%q0Li.725$ih1.539@nlpi068.nbdc.sbc.com>	<1i555ag.9ez4uvf4583jN%aleax@mac.com>	<ns9Li.1172$4V6.1092@newssvr14.news.prodigy.net>
	<1191013033.145194.193040@50g2000hsm.googlegroups.com>
Message-ID: <46FD7D53.1060403@holdenweb.com>

Kay Schluehr wrote:
> On 28 Sep., 17:53, John Nagle <na... at animats.com> wrote:
>> Alex Martelli wrote:
>>> John Nagle <na... at animats.com> wrote:
>>>> TheFlyingDutchman wrote:
>>>>> It seems that Python 3 is more significant for what it removes than
>>>>> what it adds.
>>>>> What are the additions that people find the most compelling?
>>>>     I'd rather see Python 2.5 finished, so it just works.
>>> And I'd rather see peace on Earth and goodwill among men than _either_
>>> Python 3 or your cherished "finished" 2.5 -- the comparison and implied
>>> tradeoff make about as much sense as yours.
>>      Insofar as Python has an organization, it's not adequately managing
>> extension modules.  Each extension module has its own infrastructure,
>> with its own build procedures, its own bug list, and its own maintainers.
>> There's not even an archive.  Unlike CPAN, Cheese Shop is just a directory of
>> URLs.
> 
> John, can't you please piss off?
> 
> Thanks, Kay
> 
Oops! Let's get back to goodwill and peace to all men, can we - 
including {Flying Dutch,wo}men?

crabbi-ly y'rs  - steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline


From justin.mailinglists at gmail.com  Sun Sep  9 21:53:56 2007
From: justin.mailinglists at gmail.com (Justin Ezequiel)
Date: Mon, 10 Sep 2007 01:53:56 -0000
Subject: MySQLdb: ValueError Something Stupid
In-Reply-To: <1189175986.343368.221520@d55g2000hsg.googlegroups.com>
References: <1189163332.990248.134080@d55g2000hsg.googlegroups.com>
	<1189169527.020589.185120@w3g2000hsg.googlegroups.com>
	<mailman.218.1189170695.2658.python-list@python.org>
	<1189175986.343368.221520@d55g2000hsg.googlegroups.com>
Message-ID: <1189389236.503269.14670@g4g2000hsf.googlegroups.com>

On Sep 7, 10:39 pm, mcl <mcl.off... at googlemail.com> wrote:
> On 7 Sep, 14:11, Carsten Haese <cars... at uniqsys.com> wrote:
>
>
>
> > On Fri, 2007-09-07 at 05:52 -0700, mcl wrote:
> > > > ValueError: invalid literal for int(): 0-
> > > >       args = ('invalid literal for int(): 0-',)
>
> > > > =========================================
> > > > Thanks Richard
>
> > > Sort of solved it.
>
> > > On that particular table it did not like * for all fields.
>
> > > Any reason why that would be the case ?
>
> > None that we can divine without more information. What's the schema for
> > the table in question, which column(s) are you excluding to make the
> > query work, and what kind of data is in the column(s) you're excluding?
>
> > --
> > Carsten Haesehttp://informixdb.sourceforge.net
>
> Thanks for replying.
>
> I did not exclude any columns and the Schema is:
>
> CREATE TABLE lstData (
>   qlCat varchar(20) NOT NULL default '',
>   qlTitle varchar(255) NOT NULL default '',
>   qlSubTitle varchar(255) default NULL,
>   qlDetails text,
>   qlPic varchar(20) default NULL,
>   qlPostCode varchar(16) default NULL,
>   qlUpd timestamp NOT NULL default '0000-00-00 00:00:00' on update
> CURRENT_TIMESTAMP,
>   KEY `idx-qlCat` (qlCat)
> ) ENGINE=MyISAM DEFAULT CHARSET=latin1;
>
> Thanks again
>
> Richard

saw this before on earlier MySQLdb and timestamp column
try upgrading your MySQLdb

see https://bugzilla.redhat.com/show_bug.cgi?id=155341 or
http://www.ravenbrook.com/project/p4dti/master/code/replicator/mysqldb_support.py



From steven.bethard at gmail.com  Fri Sep 28 09:51:49 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 28 Sep 2007 07:51:49 -0600
Subject: Numeric command-line options vs. negative-number arguments
In-Reply-To: <87wsub2s4w.fsf@benfinney.id.au>
References: <1190913250.198794.269530@k79g2000hse.googlegroups.com>
	<fdgpic$ssu$00$1@news.t-online.com>
	<0a6dnQmBPIzuqmHbnZ2dnUVZ_vihnZ2d@comcast.com>
	<87ejgj4lpy.fsf_-_@benfinney.id.au>
	<X5adnVivJZ2wGWHbnZ2dnUVZ_tyknZ2d@comcast.com>
	<87wsub2s4w.fsf@benfinney.id.au>
Message-ID: <Qo6dnV_HZetrm2DbnZ2dnUVZ_sejnZ2d@comcast.com>

Ben Finney wrote:
> Steven Bethard <steven.bethard at gmail.com> writes:
>> Argparse knows what your option flags look like, so if you specify
>> one, it knows it's an option.  Argparse will only interpret it as a
>> negative number if you specify a negative number that doesn't match
>> a known option.
> 
> That's also irritating, and violates the expected behaviour. It leads
> to *some* undefined options being flagged as errors, and others
> interpreted as arguments. The user shouldn't need to know the complete
> set of options to know which leading-hyphen arguments will be treated
> as options and which ones won't.
> 
> The correct behaviour would be to *always* interpret an argument that
> has a leading hyphen as an option (unless it follows an explicit '--'
> option), and complain if the option is unknown.

It was decided that practicality beats purity here. Arguments with 
leading hyphens which look numeric but aren't in the parser are 
interpreted as negative numbers. Arguments with leading hyphens which 
don't look numeric and aren't in the parser raise errors. Sure, it's not 
the pure answer, but it's the practical answer: "-123" is much more 
likely to be a negative number than an option.

STeVe


From paul.nospam at rudin.co.uk  Wed Sep 19 02:50:41 2007
From: paul.nospam at rudin.co.uk (Paul Rudin)
Date: Wed, 19 Sep 2007 07:50:41 +0100
Subject: super() doesn't get superclass
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au>
	<13f196qktorgc88@corp.supernews.com>
	<873axbxl2f.fsf@benfinney.id.au>
Message-ID: <87wsunjghq.fsf@rudin.co.uk>

Ben Finney <bignose+hates-spam at benfinney.id.au> writes:


> Possibly the name 'next_in_mro', while ugly, would at least match the
> actual behaviour of this function.

In common lisp there's (call-next-method ...) 



From lasses_weil at klapptsowieso.net  Sun Sep  9 08:11:06 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Sun, 09 Sep 2007 14:11:06 +0200
Subject: Python syntax wart
In-Reply-To: <13e7ddd9hgibae6@corp.supernews.com>
References: <fbvvil$7dj$1@lust.ihug.co.nz> <13e7ddd9hgibae6@corp.supernews.com>
Message-ID: <46e3e2db$0$30369$9b4e6d93@newsspool4.arcor-online.net>

Steven D'Aprano wrote:
> That is quite possibly the ugliest piece of code I've ever seen in 
> Python. I'm impressed. Did you format it yourself or did you use a 
> professionally written code-uglifier?
>
Boy did that make me laugh! The notion of a "code uglifier" just is a 
pearl. (I hate to call attention to these things, but that was actually 
a pun. I'm just too proud of it.)

/W


From bdesth.quelquechose at free.quelquepart.fr  Fri Sep 21 20:14:52 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 22 Sep 2007 02:14:52 +0200
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <1190454275.282176.90830@k79g2000hse.googlegroups.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<1190413322.962737.53900@r29g2000hsg.googlegroups.com>
	<1190414192.636397.146450@57g2000hsv.googlegroups.com>
	<1190443748.907702.154660@22g2000hsm.googlegroups.com>
	<7xlkazgpc5.fsf@ruckus.brouhaha.com>
	<1190447257.060479.141280@n39g2000hsh.googlegroups.com>
	<5lk2olF8gic1U5@mid.uni-berlin.de>
	<1190454275.282176.90830@k79g2000hse.googlegroups.com>
Message-ID: <46f6e9b0$0$32168$426a74cc@news.free.fr>

Kay Schluehr a ?crit :
(snip)
> 
> I checked out Io once and I disliked it. I expected Io's prototype OO
> being just a more flexible variant of class based OO but Io couples a
> prototype very closely to its offspring. When A produces B and A.f is
> modified after production of B also B.f is modified. A controls the
> state of B during the whole lifetime of B. I think parents shall not
> do this, not in real life and also not in programming language
> semantics.

I may totally miss the point, but how is this different from:

class A(object):
     def dothis(self):
         print "A.dothis(%s)" % self

class B(A):
     pass

b = B()

b.dothis()

def dothat(self):
     print "function dothat(%s)" % self

A.dothis = dothat
b.dothis()



From python-url at phaseit.net  Mon Sep 10 08:27:08 2007
From: python-url at phaseit.net (Gabriel Genellina)
Date: Mon, 10 Sep 2007 12:27:08 +0000 (UTC)
Subject: Python-URL! - weekly Python news and links (Sep 10)
Message-ID: <fc3d6s$qp9$1@lairds.us>

QOTW:  "Python is a revelation to me as a language that grows with the ability
of the programmer, which creates a multi-level community not too centered on
one-upmanship to nurture new talent." - John K Masters

"Python is a well designed language that focuses on a few simple ideas (name
semantics, dictionaries, simplicity of expression, trusting the programmer)
to make a surprisingly powerful and expressive language." - Steven Rumbalski

    
    Why should I learn python?
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/e0ec3289a995997e/
    
    Examining (the lack of) access specifiers in Python
    and how "information hiding" is obtained
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/71ef60e2d3203702/
    
    (FAQ) Two names referencing the same mutable object.  Pointers,
    references, the Java model, and how things are different in C++. 
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/d05183ffe7d473c1/
    
    The module operator (%) differs slightly from its C counterpart
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/a559c5ab2b8fe45a/
    
    Several ways to generate unique identifiers
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/3db6fef289d93a9c/
    
    Extending the Borg pattern to support distinct groups
    of objects
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/8cc3b3bc924ed0f6/
    
    exec and the local and global namespaces
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/16eaad6c94c4daed/
    
    Generating "safe" filenames suitable for different
    platforms.
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/aae0fbf0a370c761/
    
    

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

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

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

    Just beginning with Python?  This page is a great place to start:
	http://wiki.python.org/moin/BeginnersGuide/Programmers

    The Python Papers aims to publish "the efforts of Python enthusiats":
	http://pythonpapers.org/
    The Python Magazine is a technical monthly devoted to Python:
	http://pythonmagazine.com

    Readers have recommended the "Planet" sites:
	http://planetpython.org
	http://planet.python.org

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

    Python411 indexes "podcasts ... to help people learn Python ..."
    Updates appear more-than-weekly:
        http://www.awaretek.com/python/index.html

    Steve Bethard continues the marvelous tradition early borne by
    Andrew Kuchling, Michael Hudson, Brett Cannon, Tony Meyer, and Tim
    Lesher of intelligently summarizing action on the python-dev mailing
    list once every other week.
	http://www.python.org/dev/summary/

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

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

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

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

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

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch

    Although unmaintained since 2002, the Cetus collection of Python
    hyperlinks retains a few gems.
        http://www.cetus-links.org/oo_python.html

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

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

    Many Python conferences around the world are in preparation.
    Watch this space for links to them.

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
	http://www.python.org/dev/peps/pep-0042/

    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

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

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

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

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


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

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


-- The Python-URL! Team--

Phaseit, Inc. (http://phaseit.net) is pleased to participate in and
sponsor the "Python-URL!" project.  Watch this space for upcoming
news about posting archives.


From bjorn.kempen at gmail.com  Sat Sep 15 17:12:35 2007
From: bjorn.kempen at gmail.com (buffi)
Date: Sat, 15 Sep 2007 21:12:35 -0000
Subject: Python statements not forcing whitespace is messy?
In-Reply-To: <mailman.589.1189887114.2658.python-list@python.org>
References: <1189884110.006272.240840@50g2000hsm.googlegroups.com>
	<mailman.589.1189887114.2658.python-list@python.org>
Message-ID: <1189890755.870694.29790@r29g2000hsg.googlegroups.com>

On Sep 15, 10:11 pm, "J. Cliff Dyer" <j... at sdf.lonestar.org> wrote:
> buffi wrote:
> > Am I the only one that thinks that python statements should force
> > whitespace before and after them?
>
> > Right now this is not enforced and for an example these statements are
> > valid
>
> > print"hello"
> > "foo"if"bar"else"foobar"
> > for(x,y)in[(1,2),(3,4)]:print(x,y)
> > [(y)for(x,y)in[("foo",2),("bar",4)]if"foo"in(x)]
>
> > ...and so on.
>
> On the other hand, this is just as bad:
>
> [ ( y ) for ( x , y ) in [ ( "foo" , 2 ) , ( "bar" , 4 ) ] if "foo" in (
> x ) ]
>
> And I'd hate to have to remember all of the rules for what can go
> together and what can't, especially when it comes time to debug.  No.
> I don't think it should be forced, but maybe put it in PEP8 or PEP3008.
>
> Also, the only thing I find thoroughly disagreeable in all of that
> mess, is the run-ins involving " characters.  The rest are at least
> clear at a glance what belongs where.
>
> Also, would you require the following?
>
> my_function (swallow='European')
>
> Because that is just an awful use of whitespace.
>
> Cheers,
> Cliff

I believe that having whitespace around the builtin statements, and
having whitespace around everything is pretty different.

There would be no downside whatsoever to enforcing this, except for
backwards incompatibility (which is a rather huge downside but well...
py3k is gonna break everything anyways). There obviously shouldnt be
any limit to the maximum amount of whitespace used around statements
(due to formatting and so on), but allowing stuff like print"hello" is
just horrible.

- Bj?rn Kemp?n



From perl4hire at softouch.on.ca  Thu Sep 13 04:06:50 2007
From: perl4hire at softouch.on.ca (Amer Neely)
Date: Thu, 13 Sep 2007 04:06:50 -0400
Subject: Coming from Perl
In-Reply-To: <b46Gi.221$372.100@read2.cgocable.net>
References: <Cv%Fi.198$372.59@read2.cgocable.net>
	<1189644803.816375.269950@y42g2000hsy.googlegroups.com>
	<b46Gi.221$372.100@read2.cgocable.net>
Message-ID: <2b6Gi.222$372.110@read2.cgocable.net>

Amer Neely wrote:
> TheFlyingDutchman wrote:
>> On Sep 12, 5:30 pm, Amer Neely <perl4h... at softouch.on.ca> wrote:
>>> I'm a complete newbie with Python, but have several years experience
>>> with Perl in a web environment.
>>>
>>> A question I have, if someone here is familiar with Perl, does Python
>>> have something like Perl's 'here document'? I've just searched and read
>>> some postings on generating HTML but they all seem to refer to various
>>> template utilities. Is this the only way, or am I missing something? I'm
>>> used to generating X/HTML by hand, which makes the here document in Perl
>>> ideal for me. Also, many times a client already existing HTML code that
>>> I can use in a script.
>>>
>>> -- 
>>> Amer Neely
>>> w:www.webmechanic.softouch.on.ca/
>>> Perl | MySQL programming for all data entry forms.
>>> "Others make web sites. We make web sites work!"
>>
>> I am not sure if this is what you are looking for, but Python has a
>> special string with 3 quotes that I believe duplicates part of the
>> functionality of a here document:
>>
>> myHmtlHeader = """
>> <head attribute = "abc">
>> <title>My Page</title>
>> </head>
>> """
>>
>> print myHtmlHeader
>>
>>
>> outputs:
>>
>>
>> <head attribute="abc">
>> <title>My Page</title>
>> </head>
>>
> 
> Well, I have checked everything I can but I'm getting '500 Internal 
> Server Error'. The log files aren't helpful:
> [Thu Sep 13 03:43:00 2007] [error] [client 24.235.184.39] Premature end 
> of script headers: /home/softouch/public_html/cgi-bin/scratch/hello.py
> 
> I can't even get it to run on my home PC running Apache + Win2K. Same 
> error.
> 
> My script:
> #!/usr/bin/python
> import cgitb; cgitb.enable(display=0, logdir=".")
> import sys
> sys.stderr = sys.stdout
> print "Content-Type: text/html"
> print
> 
> print """
> <html>
> <body>
> <div align="center"><font style="font-family:verdana; size:18px">Hello 
> from Python</font></div>
> <br>
> Goodbye.
> </body>
> </html>
> """
> 

I should have added that it runs from the command line OK.

-- 
Amer Neely
w: www.webmechanic.softouch.on.ca/
Perl | MySQL programming for all data entry forms.
"Others make web sites. We make web sites work!"


From tdelaney at avaya.com  Wed Sep  5 19:34:44 2007
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Thu, 6 Sep 2007 07:34:44 +0800
Subject: creating really big lists
In-Reply-To: <874pi92tr4.fsf@mulj.homelinux.net>
Message-ID: <E4C7BCAB1872014F81CEAACD25699B8C08492C@301081ANEX2.global.avaya.com>

Hrvoje Niksic wrote:

> Dr Mephesto <dnhkng at googlemail.com> writes:
> 
>> I would like to create a pretty big list of lists; a list 3,000,000
>> long, each entry containing 5 empty lists. My application will
>> append data each of the 5 sublists, so they will be of varying
>> lengths (so no arrays!). 
>> 
>> Does anyone know the most efficient way to do this? I have tried:
>> 
>> list = [[[],[],[],[],[]] for _ in xrange(3000000)]

> If you're building large data structures and don't need to reclaim
> cyclical references, I suggest turning GC off, at least during
> construction.

This is good advice, but another question is whether you really want
such a list. You may well be better off with a database of some kind -
they're designed for manipulating large amounts of data.

Tim Delaney


From rustompmody at gmail.com  Sat Sep 15 04:59:45 2007
From: rustompmody at gmail.com (Rustom Mody)
Date: Sat, 15 Sep 2007 14:29:45 +0530
Subject: c interfacing in 2.5
Message-ID: <f46c52560709150159r6489faq2d672e85d4950fc5@mail.gmail.com>

I used python extensive 3-5 years back.  Coming back I find some
changes.  Trying to understand whats new and would appreciate any
help/comments/pointers.

Earlier there were basically two options:
SWIG: convenient but inefficient
Native (Extending/Embedding): an efficient way of getting a headache!
(Boost being ignored because not using C++)

Now it seems there are more possibilities:

-- Sip seems to be more efficient than swig and easier than native but
not well documented
-- pyrex could be considered
-- I know someone who uses pygtk to make wrappings

But most interesting is ctype.  I wonder if having ctype in the core
language changes the ease of use of the native wrapping model and
thereby makes sip/swig etc less necessary?

Your views and/or experience appreciated.


From ricaraoz at gmail.com  Tue Sep  4 19:35:39 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Tue, 04 Sep 2007 20:35:39 -0300
Subject: REGULAR EXPRESSION
In-Reply-To: <fbjnc1$i8b$1@sea.gmane.org>
References: <1188912767.360967.306050@y42g2000hsy.googlegroups.com>
	<fbjnc1$i8b$1@sea.gmane.org>
Message-ID: <46DDEBCB.3000704@bigfoot.com>

Steve Holden wrote:
> AniNair wrote:
>> hi.. I am trying to match '+ %&/-' etc using regular expression  in
>> expressions like 879+34343. I tried \W+   but it matches only in the
>> beginning of the string Plz help Thanking you in advance...
>>
> Perhaps you could give a few example of strings that should and 
> shouldn't match? It isn't clear from your description what pattern you 
> are trying to find.
> 
> regards
>   Steve


If it's operations between two numbers try :
r'([\d.]+?)\s*([-+/*%&])([\d.]+)'
It will give you 3 groups, first number, operation and second number
(caveat emptor).


From steve at holdenweb.com  Sat Sep 15 15:44:46 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 15 Sep 2007 15:44:46 -0400
Subject: find and remove "\" character from string
In-Reply-To: <46EC09A5.7050609@yahoo.gr>
References: <46EC09A5.7050609@yahoo.gr>
Message-ID: <fchcnj$78t$1@sea.gmane.org>

Konstantinos Pachopoulos wrote:
> Hi,
> i have the following string s and the following code, which doesn't 
> successfully remove the "\", but sucessfully removes the "\\".
> 
>  >>> s="Sad\\asd\asd"
>  >>> newS=""
>  >>> for i in s:
> ...     if i!="\\":
> ...             newS=newS+i
> ...
>  >>> newS
> 'Sadasd\x07sd'
> 
In actual fact there was just a single backslash in s to start with. If 
you read the documentation carefully at

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

(though it's the language reference manual, and therefore not 
necessarily suitable reading for beginners)  you will see that the "\\" 
represents a single backslash character and \a represents an ASCII BEL 
character (whose decimal value is 7, and which the interpreter 
represents as the hexadecimal escape string \x07).

So the characters in s were S a d \ a s d \x07 s d and you shoudl have 
seen len(s) == 10.

As has already been mentioned, the shortest way to do what you want would be

newS = s.replace("\\", "")

> I have also read the following, but i do not understand the "...and the 
> remaining characters have been mapped through the given translation 
> table, which must be a string of length 256". Can some explain?
> 
> *translate*( 	table[, deletechars])
> 
>     Return a copy of the string where all characters occurring in the
>     optional argument deletechars are removed, and the remaining
>     characters have been mapped through the given translation table,
>     which must be a string of length 256.
> 
>     For Unicode objects, the translate() method does not accept the
>     optional deletechars argument. Instead, it returns a copy of the s
>     where all characters have been mapped through the given translation
>     table which must be a mapping of Unicode ordinals to Unicode
>     ordinals, Unicode strings or |None|. Unmapped characters are left
>     untouched. Characters mapped to |None| are deleted. Note, a more
>     flexible approach is to create a custom character mapping codec
>     using the codecs <http://docs.python.org/lib/module-codecs.html>
>     module (see encodings.cp1251 for an example).
> 
The translate() string method uses the numeric represetation of each 
character as an index into the translation table. So a null translation 
table can be constructed using

 >>> t = "".join(chr(i) for i in range(256))
 >>> t
'\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\r\x0e\x0f\x10\x11\x12\x13\x14\
x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f 
!"#$%&\'()*+,-./0123456789:;<=>?@ABC
DEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~\x7f\x80\x81\x82\x83
\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f\x90\x91\x92\x93\x94\x95\x96\x97
\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab
\xac\xad\xae\xaf\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf
\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3
\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7
\xe8\xe9\xea\xeb\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb
\xfc\xfd\xfe\xff'
 >>>

(the above output will look a little screwy in the mail because of odd 
line wrapping).

So hopefully you could then achieve the same effect (at vastly greater 
complexity than the first solution) using

 >>> s="Sad\\asd\asd"
 >>> len(s)
10
 >>> newS = s.translate(t, "\\")
 >>> newS
'Sadasd\x07sd'
 >>>

You would probably only want to use that method if you were actually 
translating some of the characters at the same time.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Sep  7 11:33:26 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 07 Sep 2007 17:33:26 +0200
Subject: Class design (information hiding)
In-Reply-To: <fbrj0h$74r$1@online.de>
References: <fbr2gg$ipg$1@online.de> <46e1305e$0$18302$426a74cc@news.free.fr>
	<fbrj0h$74r$1@online.de>
Message-ID: <46e16f3f$0$26262$426a74cc@news.free.fr>

Alexander Eisenhuth a ?crit :
> Bruno Desthuilliers schrieb:
> 
>> Nope. It's either 'interface' (no leading underscore),  
>> 'implementation' (single leading underscore), 'implementation with 
>> some protection against accidental overriding' (two leading underscores).
> 
> What do you mean with 'implementation'? What does it express?

The fact that a given attribute (or method - which are just callable 
attributes FWIW) is an implementation detail, and not a part of the 
class interface.


From tmp-pythonlist at tschreiner.org  Wed Sep 26 16:40:18 2007
From: tmp-pythonlist at tschreiner.org (Thomas Schreiner)
Date: Wed, 26 Sep 2007 22:40:18 +0200
Subject: stdout and embedding into Windows apps
In-Reply-To: <46F1135A.3020301@tschreiner.org>
References: <46F1135A.3020301@tschreiner.org>
Message-ID: <46FAC3B2.7020802@tschreiner.org>

Hi,

> I'm extending a windows application (C++) by embedding Python calls.
> It seems to be a known problem that windows applications detach
> immediately from the calling console, so that all output to stdout
> (from both C++ and Python) doesn't get shown anywhere.
 >
 > A workaround seems to be the allocation of a windows console and
 > redirecting stdout to it:
 >
 > AllocConsole(); freopen("conin$", "r", stdin); freopen("conout$",
 > "w", stdout); freopen("conout$", "w", stderr);
 >
 > Still, this console only shows the output of my C++ application, not
 > the output of the embedded python calls.
 >
 > The following code Py_Initialize(); std::cout << "start printing..."
 > << std::endl; PyRun_SimpleString("print('PRINT')\n"); std::cout <<
 > "done printing." << std::endl;
 >
 > only prints
 >
 > start printing... done printing.
 >
 > Does anybody know how to fix this issue? Basically I want to get an
 > ipython console running in the background of my Windows app, so that
 > I can process its data.

for the files: I got close to what I wanted using WConio:
  http://newcenturycomputers.net/projects/wconio.html

I basically wrote my own class that I used for overwriting stdin and
stdout and that internally used WConio. This still doesn't allow
readline functionality from windows consoles, but still it's better than
nothing.

If you have any additional ideas, especially about how I can still use 
readline despite of overwriting stdin/stdout, please CC me.

Cheers,


Thomas



-- 
Thomas Schreiner, AGBS
Max Planck Institute for Biological Cybernetics
72076 Tuebingen / Germany

http://www.isistius.de


From gagsl-py2 at yahoo.com.ar  Mon Sep 10 05:25:50 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 10 Sep 2007 02:25:50 -0700
Subject: Setting stdout encoding
Message-ID: <1189416350.069995.220250@w3g2000hsg.googlegroups.com>

En Sun, 09 Sep 2007 17:49:14 -0300, Fabio Zadrozny <fabiofz at gmail.com>
escribi?:

Does someone know if there's a way to explicitly set the stdout/stderr/
stdin
encoding that python should use?

The encoding can be set using the C API for file objects - from Python
code, use ctypes:

py> from ctypes import *
py> PyFile_SetEncoding = pythonapi.PyFile_SetEncoding
py> PyFile_SetEncoding.argtypes = (py_object, c_char_p)
py> if not PyFile_SetEncoding(sys.stdout, "hex"):
...     raise ValueError
...
py> print "Hello"
Hello
py> print u"Hello"
48656c6c6f

--
Gabriel Genellina



From gagsl-py2 at yahoo.com.ar  Fri Sep 21 04:02:41 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 21 Sep 2007 05:02:41 -0300
Subject: newb: BeautifulSoup
References: <1190343890.375836.78630@r29g2000hsg.googlegroups.com>
Message-ID: <op.tyzvarn3x6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 21 Sep 2007 00:04:50 -0300, crybaby <joemystery123 at gmail.com>  
escribi?:

> I need to traverse a html page with big table that has many row and
> columns.  For example, how to go 35th td tag and do regex to retireve
> the content.  After that is done, you move down to 15th td tag from
> 35th tag (35+15) and do regex to retrieve the content?

See the examples at the BeautifulSoup page
http://www.crummy.com/software/BeautifulSoup/

-- 
Gabriel Genellina



From steve at holdenweb.com  Tue Sep 25 13:48:45 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 25 Sep 2007 13:48:45 -0400
Subject: comparing elements of a list with a string
In-Reply-To: <XLSdnddmo6KUq2TbnZ2dnUVZ_vShnZ2d@comcast.com>
References: <1190734785.439839.303030@50g2000hsm.googlegroups.com>
	<XLSdnddmo6KUq2TbnZ2dnUVZ_vShnZ2d@comcast.com>
Message-ID: <fdbhls$l4i$1@sea.gmane.org>

Larry Bates wrote:
> Shriphani wrote:
>> Hello all,
>> I have a problem here. I have a list named list_of_files which
>> contains filenames with their timestamps attached to the name. If I
>> have a string "fstab", and I want to list out the files in whose names
>> the word fstab appears should I go about like this :
>>
>> def listAllbackups(file):
>>     list_of_files = os.listdir("/home/shriphani/backupdir")
>>     for element in list_of_files:
>>          if element.find(file) != -1:
>>              date = ###
>>              time = ####
>>               return (date, time)
>>
>> The major trouble is that the return statement causes it to exit after
>> attempt one. How do I use the yield statement here?
>>
>> Regards,
>> Shriphani Palakodety
>>
> 
> You should take a quick look at glob().  You may be able to use it to make life 
> a lot easier.  Here is how you would do it if all your backup files begin with
> fstab.
> 
> import glob
> list_of_backup_files=glob.glob('/home/shriphani/backupdir/glob*')
> 
> If "fstab" can appear anywhere in the filename, this might not work for you.
> 
I don't see why

list_of_backup_files=glob.glob('/home/shriphani/backupdir/*fstab*')

shouldn't work. However, t answer the OP's question about yield (which 
nobody seems to have done fully yet):

1. Rewrite the function to become a generator function:

def listAllbackups(file):
     list_of_files = os.listdir("/home/shriphani/backupdir")
     for element in list_of_files:
          if file in element: # tidied this up too
              date = 1 ###
              time = 2 ####
              yield (date, time)

2. Create a generator by calling the function:

list_of_backup_files = listAllbackups("fstab")

3. Use the generator in an iterative context:

for file in list_of_backup_files:
     # do something

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From uymqlp502 at sneakemail.com  Sun Sep  2 04:00:37 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Sun, 02 Sep 2007 01:00:37 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <7xfy1xob5j.fsf@ruckus.brouhaha.com>
References: <1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<7xlkbsmqe4.fsf@ruckus.brouhaha.com>
	<1188525647.003223.199620@q5g2000prf.googlegroups.com>
	<mailman.181.1188527203.28954.python-list@python.org>
	<1188537516.622167.115080@z24g2000prh.googlegroups.com>
	<mailman.217.1188577500.28954.python-list@python.org>
	<1188585630.539835.242460@i38g2000prf.googlegroups.com>
	<mailman.234.1188588307.28954.python-list@python.org>
	<1188592039.612652.223700@r23g2000prd.googlegroups.com>
	<1i3ryxd.g2pzgq159lt5sN%aleax@mac.com>
	<1188711881.370954.175830@o80g2000hse.googlegroups.com>
	<7xfy1xob5j.fsf@ruckus.brouhaha.com>
Message-ID: <1188720037.117228.243240@r34g2000hsd.googlegroups.com>

On Sep 1, 11:04 pm, Paul Rubin wrote:

> I still don't understand why you don't like the decorator approach,
> which can easily implement the above.

Well, maybe decorators are the answer. If a function needs only one
decorator for all the conditions and invariants (pre and post-
conditions), and if it can just point to functions defined elsewhere
(rather than defining everything inline), then perhaps they make
sense. I guess I need to read up more on decorators to see if this is
possible.

In fact, the ideal would be to have just a single decorator type, say
"contract" or "self_test", that takes an argument that points to the
relevant functions to use for the function that the decorator applies
to. Then the actual self-test functions could be pushed off somewhere
else, and the "footprint" on the primary code would be minimal



From quentel.pierre at wanadoo.fr  Fri Sep 21 11:03:02 2007
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: Fri, 21 Sep 2007 15:03:02 -0000
Subject: Processing drag & drop on the desktop
In-Reply-To: <mailman.853.1190357939.2658.python-list@python.org>
References: <1189961614.510561.194610@w3g2000hsg.googlegroups.com>
	<1uSdnaNGwMvgBXPbnZ2dnUVZ_tjinZ2d@comcast.com>
	<1190181749.502414.195730@r29g2000hsg.googlegroups.com>
	<mailman.853.1190357939.2658.python-list@python.org>
Message-ID: <1190386982.714606.70820@n39g2000hsh.googlegroups.com>

On 21 sep, 08:58, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:


> The shortcut must point to a *program*, not a *document*.
> Change the "shortcut destination" to point to:
> c:\path\to\python c:\path\to\your\script.py
>
> --
> Gabriel Genellina

Thanks for the explanation Gabriel, it works fine now
Pierre



From prudek at bvx.cz  Tue Sep 11 11:57:27 2007
From: prudek at bvx.cz (Milos Prudek)
Date: Tue, 11 Sep 2007 17:57:27 +0200
Subject: Why zlib not included in Python tarball?
In-Reply-To: <46E5B84D.5020803@v.loewis.de>
References: <mailman.337.1189455641.2658.python-list@python.org>
	<46E5B84D.5020803@v.loewis.de>
Message-ID: <200709111757.27597.prudek@bvx.cz>


> Depends on the operating system and the Python version. On Unix, you
> need to install zlib first; if you install a precompiled zlib package,
> make sure you install the header files as well.

You were right. Thank you. 



-- 
Milos Prudek


From kw at codebykevin.com  Mon Sep 17 16:11:03 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Mon, 17 Sep 2007 16:11:03 -0400
Subject: Class for custom Tkinter widget--difficulty
Message-ID: <5786d$46eedf63$4275d90a$16155@FUSE.NET>

I'm trying to create a custom Tkinter widget class, and I'm having some 
difficulty getting it set up properly.

The class is called MacToolbar, saved in its own module MacToolbar.py, 
and imported with this statement:

	import MacToolbar

Here is the relevant portion of the class:

###relevant class code

class MacToolbar:
     def __init__(self, master):
         self.tk.call("package", "require", "macsearchfield")
         self.tk.call('package', 'require', 'tile')


     def create(self):
         self.baseframe = Tile.Frame(self, master)
         self.baseframe.pack(side='top', fill='both', expand='no')


     def toolbar(self):
         self.create()
         self.newframe = Tile.Frame(self.baseframe)
         self.newframe.pack(fill='both', expand='yes')

         self.buttonframe = Tile.Frame(self.newframe)
         self.buttonframe.pack(side='top', fill='both', expand = 'yes')


I'm a bit confused on how to call a class that is imported via a module. 
Both approaches I try produce errors:

The first approach:

	self.topframe = MacToolbar.toolbar(self.mainframe)

yields this error:

	AttributeError: 'module' object has no attribute 'toolbar'

The second approach:

  	self.topframe = MacToolbar.MacToolbar.toolbar(self.mainframe)

yields this error:

	TypeError: unbound method toolbar() must be called with MacToolbar 
instance as first argument (got Frame instance instead)

I was expecting to be able to use the standard Class.Method notation in 
calling MacToolbar class methods, but it appears that this does not work 
at all: that's what I see in the first error above. Instead I have to 
use Module.Class.Method notation? I've never seen this before.

Can someone point out what I am doing wrong, either in the construction 
of the class, the way it's imported, or in how I'm calling methods?

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


From bdesth.quelquechose at free.quelquepart.fr  Mon Sep  3 23:31:36 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 04 Sep 2007 05:31:36 +0200
Subject: Printing lists in columns
In-Reply-To: <1188979665.052672.211110@r34g2000hsd.googlegroups.com>
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<mailman.315.1188810174.28954.python-list@python.org>
	<46dbd11e$0$6228$426a74cc@news.free.fr>
	<mailman.317.1188812089.28954.python-list@python.org>
	<1188816626.021956.281040@22g2000hsm.googlegroups.com>
	<5k2cjmF1r2aiU1@mid.uni-berlin.de>
	<1188836008.656284.76160@o80g2000hse.googlegroups.com>
	<46dc6f49$0$6207$426a34cc@news.free.fr>
	<1188900397.459760.259580@k79g2000hse.googlegroups.com>
	<slrnfdqe3t.i4p.hat@se-162.se.wtb.tue.nl>
	<Xns99A17FAC2587duncanbooth@127.0.0.1>
	<1188906767.737741.267350@19g2000hsx.googlegroups.com>
	<Xns99A18F8C528BCduncanbooth@127.0.0.1>
	<1188913394.763871.218660@d55g2000hsg.googlegroups.com>
	<46dd69b1$0$24998$426a74cc@news.free.fr>
	<1188917550.261894.84010@k79g2000hse.googlegroups.com>
	<46ddbb26$0$18672$426a74cc@news.free.fr>
	<1188979665.052672.211110@r34g2000hsd.googlegroups.com>
Message-ID: <46de8982$0$10567$426a74cc@news.free.fr>

cjt22 at bath.ac.uk a ?crit :
> Thanks guys, I really appreciate it. I have never used google groups
> before

Actually, comp.lang.python is a usenet newsgroup, not a google group. 
Google only gives you a web fronted (and archives...) for that group. I 
personnaly access it with my MUA.

> and am so impressed with how helpful you all are. It is also lovely
> that
> none of you mock my little knowledge of Python but just want to
> improve it.

Well... Why should we mock ? We've all been beginners, and we're still 
all beginners in a domain or another.

But welcome to c.l.py and thanks for appreciating this group anyway !-)

> I have another question in relation to the izip_longest function (I
> persume
> this should be within the same topic).
> Using this funciton, is there a way to manipulate it so that the
> columns can be formated
> tabular i.e. perhaps using something such as str(list).rjust(15)
> because currently the columns
> overlap depending on the strings lengths within each column/list of
> lists. i.e. my output is
> currently like:
> 
> bo, daf, da
> pres, ppar, xppc
> magnjklep, *, dsa
> *, *, nbi
> 
> But I want it justified, i.e:
> 
> bo       ,  daf,  da
> pres     , ppar,  xppc
> magnjklep,    *,  dsa
> *        ,    *,  nbi
> 
> I am struggling to understand how the izip_longest function works

What's bothering you ?-)

Sorry, just joking. This code uses some 'advanced' stuffs like closures, 
HOFs and generators/iterators, so it's obviously not that simple to grok 
- FWIW, I myself had to read it at least thrice to understand it.

> and thus don't really know how it could be manipulated to do the
> above.

FWIW, you don't have - and IMHO should not try - to do this within 
izip_longest, which is a generic function.

> It would be much apprecited if somoene could also explain how
> izip_function
> works as I don't like adding code into my programs which I struggle to
> understand.
> Or perhaps I have to pad out the lists when storing the Strings?

I'd personnaly do the formatting just before printing.


From phil at riverbankcomputing.co.uk  Tue Sep 25 09:35:32 2007
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Tue, 25 Sep 2007 14:35:32 +0100
Subject: PyQt disconnect signal / slot
In-Reply-To: <fdb257$lra$1@online.de>
References: <fdb257$lra$1@online.de>
Message-ID: <200709251435.32863.phil@riverbankcomputing.co.uk>

On Tuesday 25 September 2007, Alexander Eisenhuth wrote:
> Hello PyQt experts,
>
> do i have to disconnect all signal/slots, after the emitting object is
> deleted, or does it the QObject destructor?

It's done for you - same as Qt.

Phil


From tgrav at mac.com  Sat Sep  1 20:45:37 2007
From: tgrav at mac.com (Tommy Grav)
Date: Sat, 1 Sep 2007 20:45:37 -0400
Subject: A big problem with _name_ ==  '_main_'
In-Reply-To: <fbd0g8$e3c$1@aioe.org>
References: <fbd0g8$e3c$1@aioe.org>
Message-ID: <C2A38CC2-65A5-4205-8DFD-7C93CEBB7F92@mac.com>

On Sep 1, 2007, at 8:35 PM, onurays wrote:
> I have begun to teach me Python today. The problem is :
>
>     NameError: name 'name' is not defined.
>
> I am using winXP and i used that:
>
>     if  _name_ == '_main_' :
>         MyClass()
>         gtk.main()
>
> Onuray.

I believe that should be a double underscore

if __name__ == '__main__':
	MyClass()
	gtk.main()

Cheers
   Tommy



From bj_666 at gmx.net  Mon Sep 10 04:34:36 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 10 Sep 2007 08:34:36 GMT
Subject: Python syntax wart
References: <fbvvil$7dj$1@lust.ihug.co.nz>
	<5khh6nF3i5nuU1@mid.uni-berlin.de> <46E390B7.2080808@web.de>
	<fc0518$aa2$5@lust.ihug.co.nz> <5ki2sdF3nr68U1@mid.individual.net>
	<fc2c52$i1l$3@lust.ihug.co.nz> <5kk8p0F3vfqqU1@mid.uni-berlin.de>
	<fc2t89$rik$4@lust.ihug.co.nz> <5kkcmvF3vfqqU3@mid.uni-berlin.de>
	<fc2uls$shh$2@lust.ihug.co.nz>
Message-ID: <5kkdsrF3vfqqU5@mid.uni-berlin.de>

On Mon, 10 Sep 2007 20:19:08 +1200, Lawrence D'Oliveiro wrote:

> In message <5kkcmvF3vfqqU3 at mid.uni-berlin.de>, Marc 'BlackJack' Rintsch
> wrote:
> 
>> I see a tree structure here ...
> 
> Good, you're improving.

Thanks.

>> ... but still no table. 
> 
> Who said anything about a table?

Me. If that statement is 2D I expected to see a table structure.  And I
don't mean that the source code itself is arranged in lines and columns
but that the so called *2D statement* can be seen as table.

>> And this is also easily written that way in Python if you don't insist on
>> the line break after the ``if`` or can live with backslashes.
> 
> Which is precisely the point.

Then is the lack of curly braces also a syntax wart.  Maybe you should
switch to a different language or write a preprocessor.

Ciao,
	Marc 'BlackJack' Rintsch


From paul.nospam at rudin.co.uk  Mon Sep 10 04:26:54 2007
From: paul.nospam at rudin.co.uk (Paul Rudin)
Date: Mon, 10 Sep 2007 09:26:54 +0100
Subject: concise code (beginner)
References: <13dsvqrqivtf092@corp.supernews.com>
	<13dv4uqqb806ff0@corp.supernews.com> <fbqo83$8fd$1@lust.ihug.co.nz>
	<13e99756io95p66@corp.supernews.com> <fc2c86$i1l$4@lust.ihug.co.nz>
	<13e9taoa44icgb4@corp.supernews.com>
	<5kkd0oF3vfqqU4@mid.uni-berlin.de>
Message-ID: <87veajq629.fsf@rudin.co.uk>

Marc 'BlackJack' Rintsch <bj_666 at gmx.net> writes:

> On Mon, 10 Sep 2007 17:42:16 +1000, bambam wrote:
>
>> "Lawrence D'Oliveiro" <ldo at geek-central.gen.new_zealand> wrote in
>> message news:fc2c86$i1l$4 at lust.ihug.co.nz...
>>> In message <13e99756io95p66 at corp.supernews.com>, bambam wrote:
>>>
>>>> Thank you,
>>>
>>> Don't top-post.
>>
>> I have a number of  news readers here, but all of them work
>> better  with top-posting, and in none of them is top posting
>> a problem.
>
> This is not about *you* having any problems but all the people who must
> read your top postings.  Most of them, at least in this news group, expect
> that a text read from top to bottom follows time from earliest to latest.
> And as most here don't top post, a conversation with a top poster starts
> to get mixed and even harder to follow.


>From <http://en.wikipedia.org/wiki/Top-posting>

A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?

:)



From carsten at uniqsys.com  Fri Sep  7 23:01:37 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 07 Sep 2007 23:01:37 -0400
Subject: Python Problem
In-Reply-To: <l404e316v2lknjsfrct9nlcs2jl9206qrf@4ax.com>
References: <l404e316v2lknjsfrct9nlcs2jl9206qrf@4ax.com>
Message-ID: <1189220497.3262.24.camel@localhost.localdomain>

On Fri, 2007-09-07 at 21:58 -0400, Wiseman wrote:
> Hi,
> 
> The line:
> 
> import enchant
> 
> works perfectly OK when I call a Python progrma (sp.py) from IDLE
> (WInXP). When I try to run it ftom the command line (python sp.py) the
> response is:
> 
> Traceback (most recent call last):
>    File "sp.py", line 3, in <module>
>      import enchant
> ImportError: No module named enchant

Enchant is a third-party package that must have been installed
separately. The most likely cause for the problem you're seeing is that
you have two Python versions on your computer, one with Enchant
installed, one without, and you're running the GUI of the one that does
have Enchant and the command line of the one that doesn't.

It's possible that the cause is something else, but to eliminate the
most obvious solution, run "import sys; print sys.version" in each
Python and check if they differ.

> Searching my computer (the whole of drive c:\) I could not find ANY
> file called enchant.*.

It is not necessary to have a file called enchant-dot-anything anywhere
on your disk to successfully import enchant as a module. The module
could also be built-in, stored inside a zip-file, or it could be a
package.

In enchant's case, it's a package, i.e. somewhere on your disk you'll
find a folder called "enchant" with a file "__init__.py" inside it.

To find out quickly where "enchant" is, simply issue "print enchant"
after importing enchant in IDLE. It'll tell you from where the module
was loaded.

HTH,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From deets at nospam.web.de  Wed Sep 26 05:16:11 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 26 Sep 2007 11:16:11 +0200
Subject: setuptools without unexpected downloads
References: <87ejgmklep.fsf@benfinney.id.au> <878x6ukkvq.fsf@benfinney.id.au>
	<5luhb0Faal8aU1@mid.uni-berlin.de> <874phhlupi.fsf@benfinney.id.au>
Message-ID: <5lumarFae888U1@mid.uni-berlin.de>

Ben Finney wrote:

> "Diez B. Roggisch" <deets at nospam.web.de> writes:
> 
>> Ben Finney schrieb:
>> > To clarify: I want to retain the "assert the specified
>> > dependencies are satisfied" behaviour, without the "... and, if
>> > not, download and install them the Setuptools Way" behaviour.
>> >
>> > Instead, I just want the default "dependencies not satisfied"
>> > behaviour for my 'setup.py' program to be: complain the
>> > dependencies aren't met, and refuse to install.
>> 
>> The problem here is that your favorite OS vendor/distributor not
>> necessarily offers the required meta-information - so setuptools
>> can't check the dependencies.
> 
> Let's assume it does. How would I modify my 'setup.py' script so that
> its default behaviour, when dependencies are not met, is not "download
> and install dependencies via setuptools" but instead "exit with error
> message"?

easy_install has the --no-deps commandline argument. I'm not sure if that is
triggerable from inside setup.py - but in the end, you wanted user choice,
didn't you?

Generally speaking, I think the real problem here is the clash
between "cultures" of dependency-handling. But it's certainly beyond
setuptools scope to cope with every imaginable package management system
out there, and provide means to trigger an installation of say e.g. debian
packages that are needed.

So - if you really want to go the debian/ubuntu/suse/whatever-way, provide
packages in their respective format, with the dependencies met.

If you are not willing to do that, the self-contained solution at least
offers an option for hassle-free first time installation, especially when
there is a mixture of meetable and non-meetable dependencies with the OS
system.

For example - what if there is no debian package that provides module XY in
the required version? Do you rather install it into the global
site-packages, or do you rather keep it private to the program requiring
it? I'd say the latter is better in mostly all circumstances, as it will
not disrupt the workings of other programs/modules.

Diez


From netguru7575 at gmail.com  Sun Sep 30 01:41:48 2007
From: netguru7575 at gmail.com (netguru7575 at gmail.com)
Date: Sat, 29 Sep 2007 22:41:48 -0700
Subject: All Quick Test Professional (QTP) FAQs
Message-ID: <1191130908.594033.290730@w3g2000hsg.googlegroups.com>

All Quick Test Professional (QTP) FAQs



QuickTest Professional (QTP) Questions and Answers Part # 1

http://softwareqatestings.com/content/view/188/38/



QuickTest Professional (QTP) Questions and Answers Part # 2

http://softwareqatestings.com/content/view/189/38/



QuickTest Professional (QTP) Questions and Answers Part # 3

http://softwareqatestings.com/content/view/190/38/



QuickTest Professional (QTP) Questions and Answers Part # 4

http://softwareqatestings.com/content/view/191/38/



QuickTest Professional (QTP) Questions and Answers Part # 5

http://softwareqatestings.com/content/view/192/38/



From fakeaddress at nowhere.org  Sat Sep 22 11:34:53 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Sat, 22 Sep 2007 15:34:53 GMT
Subject: Zope review
In-Reply-To: <mailman.924.1190473062.2658.python-list@python.org>
References: <1190331847.514475.284200@22g2000hsm.googlegroups.com>	<1190403772.862325.113960@y42g2000hsy.googlegroups.com>	<mailman.901.1190415882.2658.python-list@python.org>	<1190432460.360614.293400@n39g2000hsh.googlegroups.com>
	<mailman.924.1190473062.2658.python-list@python.org>
Message-ID: <xCaJi.51366$Um6.14342@newssvr12.news.prodigy.net>

Sean Tierney wrote:
>>From Twisted's website "Twisted is a networking engine written in
> Python, supporting numerous protocols. It contains a web server,
> numerous chat clients, chat servers, mail servers, and more.
> 
> Given that Zope is also a written in python, supports numerous
> protocols, contains a webserver, has several chat packages available,
> a comparison/contrast would be quite useful.

You just got a useful comparison from Istvan Albert:

> Istvan Albert wrote:
>> Twisted is a networking engine, Zope is a web application framework,
>> Plone is a content management system, there is nothing to compare,
>> these are different applications altogether, it is not like you'd
>> replace one with the other
>>
>> For applications that can be compared see Zope vs Django vs Pylons vs
>> web.py vs CherryPy. Google these and contrast away.


-- 
--Bryan


From carsten at uniqsys.com  Sat Sep 22 11:53:57 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Sat, 22 Sep 2007 11:53:57 -0400
Subject: frange() question
In-Reply-To: <87lkaz40sj.fsf@pobox.com>
References: <fctrc1$doh$1@news.nems.noaa.gov> <87tzppjhe4.fsf@pobox.com>
	<mailman.827.1190318121.2658.python-list@python.org>
	<87lkaz40sj.fsf@pobox.com>
Message-ID: <1190476437.3108.35.camel@localhost.localdomain>

On Sat, 2007-09-22 at 07:27 +0000, John J. Lee wrote:
> Carsten Haese <carsten at uniqsys.com> writes:
> 
> > On Thu, 2007-09-20 at 18:55 +0000, John J. Lee wrote:
> >> Functions are never generators, senso stricto.  There are "generator
> >> functions", which *return* (or yield) generators when you call them.
> >
> > Actually, a generator function is a function that returns a generator.
> 
> Read what I wrote again.  What makes you begin your sentence with
> "Actually", rather than "Putting it another way"?

I was attempting to correct your interjection "(or yield)." A generator
function doesn't yield a generator; it returns a generator that yields
sequence values.

The second half of my post illustrates a difference of opinion about
what constitutes a generator function. You state that frange() is not a
generator function because it doesn't use yield, but it behaves like
one. My point is that it *is* a generator function because the generator
expression is merely syntactic sugar for an equivalent for/yield loop.

Of course, the distinction of whether frange() *is* a generator function
or merely *behaves* as one is immaterial in practice, and we can both be
right in the absence of a formal definition of what a generator function
is. PEP 255 says "A function that contains a yield statement is called a
generator function," but that was written before generator expressions
were introduced.

HTH,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From tenax.raccoon at gmail.com  Tue Sep  4 02:14:21 2007
From: tenax.raccoon at gmail.com (Jason)
Date: Mon, 03 Sep 2007 23:14:21 -0700
Subject: list index()
In-Reply-To: <5jn9qgFdmbcU3@mid.uni-berlin.de>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<87hcmhebwv.fsf@benfinney.id.au> <5jn9qgFdmbcU3@mid.uni-berlin.de>
Message-ID: <1188886461.236237.168230@y42g2000hsy.googlegroups.com>

On Aug 30, 1:27 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Thu, 30 Aug 2007 17:09:36 +1000, Ben Finney wrote:
> > zzbba... at aol.com writes:
>
> >> What's with the index() function of lists throwing an exception on not
> >> found?
>
> > It's letting you know that the item isn't in the list. There's no
> > sensible return value from an "index" function in that condition.
>
> What about -1?  C programmers do this all the time.  :-)
>
> Ciao,
>         Marc 'BlackJack' Rintsch

As other people pointed out, C doesn't have exceptions, so a C
programmer must make an in/out parameter to indicate an error, or have
a special return value.  In Python, you're most often searching the
list for an object which is in the list, so the lack of the object is
an exceptional condition.  You can certain check with the "in"
operator beforehand to avoid the exception.  You may also subclass a
list and override the index method, or write a standalone function to
catch the exception and change its value.

The reason why the exception is more Pythonic is that the return value
is always a guaranteed good index into the list.  Any errors
(including calling .index() on a non-list instance that doesn't have
a .index method) are exceptional, and should probably follow a very
different code path.

Returning -1 is not a good return value to indicate an error.  After
all, -1 is a valid index in most Python lists.  (Negative numbers
index from the tail of the list.)

  --Jason



From carsten at uniqsys.com  Mon Sep 24 07:49:39 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 24 Sep 2007 07:49:39 -0400
Subject: Almost There - os.kill()
In-Reply-To: <003201c7fe9f$a88ff3d0$f9afdb70$@rawlins@thinkbluemedia.co.uk>
References: <002601c7fe9d$52ffb9c0$f8ff2d40$@rawlins@thinkbluemedia.co.uk>
	<003201c7fe9f$a88ff3d0$f9afdb70$@rawlins@thinkbluemedia.co.uk>
Message-ID: <1190634579.3385.33.camel@dot.uniqsys.com>

On Mon, 2007-09-24 at 12:40 +0100, Robert Rawlins - Think Blue wrote:
> Woops,
> 
>  
> 
> Spoke too soon, just wrapped them in int() and it works a charm :-D

I'm glad that you figured it out for yourself. I'd like to suggest that
you adjust your "give up and ask the list for help" threshold upwards.
Being stumped is frustrating, but on the other hand, figuring stuff out
for yourself is very rewarding, and you retain the acquired knowledge
more readily than if someone just gave you the answer.

By the way, I hope you only wrapped the pid argument in int(), since 15
is already an int.

-- 
Carsten Haese
http://informixdb.sourceforge.net




From steve at REMOVE-THIS-cybersource.com.au  Fri Sep 14 20:14:47 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sat, 15 Sep 2007 00:14:47 -0000
Subject: How to avoid overflow errors
Message-ID: <13em8vnr527rq20@corp.supernews.com>

I thought that overflow errors would be a thing of the past now that 
Python automatically converts ints to longs as needed. Unfortunately, 
that is not the case.

>>> class MyInt(int):
...     pass
...
>>> MyInt(sys.maxint)
2147483647
>>> MyInt(sys.maxint+1)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
OverflowError: long int too large to convert to int


How do I subclass int and/or long so that my class also auto-converts 
only when needed?



-- 
Steven.


From arobert at townisp.com  Mon Sep 10 19:53:28 2007
From: arobert at townisp.com (Andrew Robert)
Date: Mon, 10 Sep 2007 19:53:28 -0400
Subject: question on python syntax
In-Reply-To: <1189467581.200075.236120@g4g2000hsf.googlegroups.com>
References: <1189467581.200075.236120@g4g2000hsf.googlegroups.com>
Message-ID: <46E5D8F8.1060501@townisp.com>

a.m. wrote:
> If I type this in shell
> 
> $ ./yourfile.py 12:34 PM &
> 
> What does '$', '.', '/' and '& means in this succession? Note: 12:34
> PM is a argument to the yourfile.py.
> 

This not python syntax but Unix shell.

$             = shell prompt
./            = look for the program in my current working directory
yourfile.py   = the program name
12:34         = argument 1
PM            = argument 2
&             = run in background


From modiinfo at gmail.com  Mon Sep 10 09:11:47 2007
From: modiinfo at gmail.com (Harshad Modi)
Date: Mon, 10 Sep 2007 13:11:47 -0000
Subject: encoding latin1 to utf-8
In-Reply-To: <mailman.315.1189428513.2658.python-list@python.org>
References: <1189427146.723304.270600@22g2000hsm.googlegroups.com>
	<mailman.315.1189428513.2658.python-list@python.org>
Message-ID: <1189429907.971736.307210@57g2000hsv.googlegroups.com>

thx for Reply ,
but I need some basic knowledge . how to encoding ? which algorithm
use for that . bz my data has some special char , i have not
confidence   this function got proper result. i want to make my own
function  / script for encoding.



From me at rpatterson.net  Sun Sep 30 17:14:53 2007
From: me at rpatterson.net (Ross Patterson)
Date: Sun, 30 Sep 2007 14:14:53 -0700
Subject: ANN: Generating svn:externals by inspecting a repository -
	z3c.repoexternals
Message-ID: <87r6kfkg8i.fsf@superfluity.lefae.org>

z3c.repoexternals recursively retrieves subversion directory listings
from the url or path and matches directories against a previous set of
svn:externals if provided then against regular expressions and generates
qualifying svn:externals lines.  The defaults generate a set of
svn:externals for all the trunks in a repository and keeps them up to
date with the repository as new trunks are added when the previous
externals are provided thereafter.

http://cheeseshop.python.org/pypi/z3c.repoexternals

Ross



From michele.simionato at gmail.com  Mon Sep  3 03:15:59 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Mon, 03 Sep 2007 07:15:59 -0000
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
In-Reply-To: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
Message-ID: <1188803759.498517.198900@g4g2000hsf.googlegroups.com>

On Sep 3, 2:21 am, llothar <llot... at web.de> wrote:
> I'm afraid that the GIL is killing the usefullness of python for some
> types of applications now where 4,8 oder 64 threads on a chip are here
> or comming soon.
>
> What is the status about that for the future of python?

This is FAQ. You will find thousands of discussion on the net about
that.
My personal opinion (and I am not the only one in the Python
community) is that
if you want to scale the way to go is to use processes, not threads,
so removing the GIL would be a waste of effort anyway.
Look at the 'processing' module in PyPI.

 Michele Simionato



From aahz at pythoncraft.com  Sat Sep  1 11:16:40 2007
From: aahz at pythoncraft.com (Aahz)
Date: 1 Sep 2007 08:16:40 -0700
Subject: Co-developers wanted: document markup language
References: <87odgyyx9u.fsf@wilson.homeunix.com>
	<7xy7g1if24.fsf@ruckus.brouhaha.com> <fbbi1h$cdd$2@lust.ihug.co.nz>
	<roy-5D1B70.09244001092007@news.panix.com>
Message-ID: <fbbvoo$38t$1@panix3.panix.com>

In article <roy-5D1B70.09244001092007 at news.panix.com>,
Roy Smith  <roy at panix.com> wrote:
>
>Anybody remember Scribe?

Not directly....

http://groups.google.com/group/comp.os.cpm.amethyst/msg/d12201a697384a6a
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"If you don't know what your program is supposed to do, you'd better not
start writing it."  --Dijkstra


From evan at yelp.com  Mon Sep 17 21:30:21 2007
From: evan at yelp.com (Evan Klitzke)
Date: Mon, 17 Sep 2007 18:30:21 -0700
Subject: can Python be useful as functional?
In-Reply-To: <1190073045.618869.261290@k79g2000hse.googlegroups.com>
References: <1190073045.618869.261290@k79g2000hse.googlegroups.com>
Message-ID: <cfb58d850709171830p2322e18fy4383a9cceac0c69f@mail.gmail.com>

On 9/17/07, Lorenzo Stella <lorestar at gmail.com> wrote:
> Hi all,
> I haven't experienced functional programming very much, but now I'm
> trying to learn Haskell and I've learned that: 1) in functional
> programming LISTS are fundmental; 2) any "cycle" in FP become
> recursion.
> I also know that Python got some useful tool such as map, filter,
> reduce... so I told: "let's try some FP-style programming with
> Python!". I took a little example of Haskell:
>
>      listprimes :: Integer -> [Integer]
>      listprimes n = if n == 0 then sieve [2..] else sieve [2..(n-1)]
> where
>             sieve [] = []
>             sieve (p:xs) = p : sieve (filter (\x -> mod x p > 0) xs)
>
> and I tried to "translate" it in Python:
>
>      def sieve(s):
>          if s == []:
>              return []
>          else:
>              return [s[0]] + sieve(filter((lambda x: x % s[0] > 0),
> s[1:]))
>
>      def listprimes(n):
>          return sieve(range(2,n))
>
> These should be almost the same: listprimes actually lists prime
> integers up to n-1. The result is: Haskell implementation works well,
> maybe it's not the better way to do it, but it does what I wanted.
> Python implementation gives me
>
>      RuntimeError: maximum recursion depth exceeded in cmp
>
> My question is: how can we call a language "functional" if it's major
> implementation has a limited stack? Or is my code wrong?

Python does not optimize tail recursion. You can increase the maximum
recursion limit with sys.setrecursionlimit, but the code will still be
slow.

I am a fan of functional programming languages (including Haskell!),
but I wouldn't try to write functional code in Python -- the language
isn't optimized for this type of code, and the syntax it provides
isn't very elegant, compared to other functional languages. If you
want to write functional code, use a real functional language!

-- 
Evan Klitzke <evan at yelp.com>


From ricaraoz at gmail.com  Sun Sep 30 14:54:04 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Sun, 30 Sep 2007 15:54:04 -0300
Subject: Can you please give me some advice?
In-Reply-To: <1191173228.756531.225860@o80g2000hse.googlegroups.com>
References: <mailman.1300.1191147737.2658.python-list@python.org>	<13fuv0gh7342r27@corp.supernews.com>
	<1191173228.756531.225860@o80g2000hse.googlegroups.com>
Message-ID: <46FFF0CC.4070106@bigfoot.com>

cmpython at gmail.com wrote:
>> Hello World in Ruby (and a few other languages):http://www.oreillynet.com/ruby/blog/2005/12/hello_world.html
> 
>> Hello World in Python:http://python.about.com/od/gettingstarted/ss/helloworld.htm
> 
> I know nothing of Ruby, but just the fact that in Ruby the Hello World
> program is
> 
> puts 'Hello, World!'
> 
> whereas the Python Hello World program is
> 
> print 'Hello, World!'
> 
> suggests to me that Python is more intuitive because the word "print"
> has a meaning in English that makes sense given what you want to do,
> but "puts" just doesn't.  And, as someone who has been learning Python
> from almost no knowledge of programming, I've found it is not too bad
> in trying to keep as reasonably close to a natural language like
> English
> as possible.
> 
> I also think the mandatory indenting of Python is helpful in forcing
> new programmers to be neat and see code blocks quickly.  Plus I doubt
> the Ruby community has such a large group of helpful people and
> libraries
> and such (but I could be wrong about that, just assuming it based on
> the
> fact that Python has been around longer).
> 
> On the other hand, perhaps because Ruby is newer it has been able to
> freshly start with advantages learned from the difficulties of other
> languages.  Byung-Hee Hwang ought to go the Ruby group and see what
> they are saying.
> 
> As far as English goes, Byung-Hee, you have to admit English grammar
> is easy (though spelling is not so easy).  That anyone can speak and
> write Chinese is impressive to me, as the language looks completely
> impossible!  Good luck!
> 
> 

Errhhh..... guys...... I think .kr means Korea.... so he would speak
Korean, not Chinese




From wizzardx at gmail.com  Wed Sep 12 06:34:52 2007
From: wizzardx at gmail.com (David)
Date: Wed, 12 Sep 2007 12:34:52 +0200
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
Message-ID: <18c1e6480709120334g6f9d7615jaf9826ee9d6951a8@mail.gmail.com>

> Please help if I am missing something -- this looks like a great
> language but I am going to mad trying to read numerical code full of
> 'self.'s breaking up the equations.

You could try this in your functions:

s = self

Then you can use code like this: s.a_dot = s.k(s.a-s.u)

Another option, if you use the vars a lot in a given function, is to
copy them to local vars. This can also slightly speed up your code
(fewer member lookups).


From steve at REMOVE-THIS-cybersource.com.au  Wed Sep 12 23:09:27 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Thu, 13 Sep 2007 03:09:27 -0000
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr> <fc8fc9$4qa$1@news2.carnet.hr>
	<5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<87sl5j5r34.fsf@benfinney.id.au>
	<1189646281.569796.267940@d55g2000hsg.googlegroups.com>
	<87ir6f5mrq.fsf@benfinney.id.au>
	<1189651204.408268.57580@19g2000hsx.googlegroups.com>
Message-ID: <13ehaf7rsbdba60@corp.supernews.com>

On Wed, 12 Sep 2007 19:40:04 -0700, TheFlyingDutchman wrote:

>>     >>> Foo.bar(foo, "spam")
>>     >>> foo.bar("spam")
> 
> That looks like a case of "There's more than one way to do it". ;) The
> first form is definitely consistent with the method declaration, so
> there's a lot to be said for using that style when teaching people to
> make classes -> send self, receive self.

I think it is a horrible thing to teach beginners. Would you teach them 
to write 1.__add__(1) instead of 1+1?

I think that beginners should be taught to write

instance.method(arguments)

and then only introduced to 

class.method(instance, arguments)

when they progress to needing to know what happens under the hood.



>> The latter two statements are equivalent. The 'instance.method(args)'
>> syntax is just sugar for 'Class.method(instance, args)'.
> 
> I think I saw where Guido Van Rossum had referred to something as
> "syntactic sugar" in some python.org page. I am not familiar with sugar
> as related to syntax. Is it being used as a synonym for "easier way of
> doing it"?

"Syntactic sugar" is not really well defined, it's a fuzzy concept, but 
in a nutshell it is special syntax made to "sweeten" the language by 
giving an easier way to write common tasks.

It's hard to find examples of syntactic sugar that everybody agrees are 
syntactic sugar, but I consider the following to be good (in the sense of 
useful, obvious and well-thought-out) examples:

alist[-1] for alist[len(alist)-1]

list comprehensions and generator expressions


Perhaps less attractive, but still very(?) useful, examples of syntactic 
sugar are decorators and the "X if C else Y" ternary operator.



-- 
Steven


From gagsl-py2 at yahoo.com.ar  Sun Sep 16 22:27:25 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 16 Sep 2007 23:27:25 -0300
Subject: Try this
References: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>
	<13eqsdfsfvsa16f@corp.supernews.com>
	<1189969529.652871.19280@50g2000hsm.googlegroups.com>
	<mailman.621.1189970593.2658.python-list@python.org>
	<1189979679.969074.216490@y42g2000hsy.googlegroups.com>
	<1189981681.745195.18130@y42g2000hsy.googlegroups.com>
	<1189983233.709832.124290@19g2000hsx.googlegroups.com>
	<1189984913.956999.163100@n39g2000hsh.googlegroups.com>
	<1189990689.259451.232570@g4g2000hsf.googlegroups.com>
Message-ID: <op.tyr03zvkx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 16 Sep 2007 21:58:09 -0300, mensanator at aol.com  
<mensanator at aol.com> escribi?:

>> I'm eagerly awaiting publication of your professional specification
>> for correctly detecting the encoding of an arbitrary stream of
>> bytes
>
> The very presence of an algorithm to detect encoding is a bug.
> Files with they .txt extension should always be treated as ANSI
> even if they contain binary data.

Why ANSI? Because it's convenient to *you*? What about the rest of the  
world that don't speak English or even worse, don't use the Latin alpabet?
What do you mean by "binary data"? Notepad is not interpreting the file as  
"binary", it's text, but interpreted using the wrong encoding.

If you want to understand what happens here: The Unicode block for 'CJK  
Unified Han' goes from U+4E00 to U+9FFF and is the largest block in the  
basic plane, with more than 20000 code points. The previous block contains  
the famous 64 hexagrams, and the previous block is 'CJK Unified Han  
Extension A' ranging from U+3400 to U+4DBF.
Note that ASCII letters go from 0x41-0x5A and 0x61-7A, and the range  
0x4100-0x7AFF is totally contained inside the above Unicode blocks.  
Reading a small phrase containing only ASCII letters as it were in UTF16  
would collapse each two letters into a single character, each character  
being part of 'CJK Unified Han'. (Space and punctuation are allowed in odd  
positions only, else the character would not belong to the Han blocks).
As every character goes into the same code block the heuristics concludes  
that the text is some Estern language encoded in UTF16.
This is the "Well you are speed" phrase interpreted as UTF16:  
u'\u6557\u6c6c\u7920\u756f\u6120\u6572\u7320\u6570\u6465'

> Notepad should never be
> allowed to try to decide what the encoding is if the the open
> dialog has the encoding set to ANSI.

I'm using notepad.exe version 5.1.2600.2180 (XP SP2 fully updated) and  
that's exactly what happens. I have to explicitely select Unicode in order  
to see those Han characters.

-- 
Gabriel Genellina



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Sep 14 05:41:13 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 14 Sep 2007 11:41:13 +0200
Subject: newbie: self.member syntax seems /really/ annoying
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>	<1189604018.520338.162520@57g2000hsv.googlegroups.com>	<mailman.486.1189693844.2658.python-list@python.org>	<13eim00ha4lf356@corp.supernews.com>	<Xns99AA68B097778OKB@199.45.49.11>	<5ktfb5F5ctrvU1@mid.individual.net>	<46e98e01$0$30383$9b4e6d93@newsspool4.arcor-online.net>	<46e9921e$0$26251$426a74cc@news.free.fr>	<46e995d1$0$16120$9b4e6d93@newsspool1.arcor-online.net>	<mailman.503.1189715816.2658.python-list@python.org>
	<46e9b09c$0$7685$9b4e6d93@newsspool2.arcor-online.net>
	<mailman.509.1189721902.2658.python-list@python.org>
Message-ID: <5kv39pF5mo3hU1@mid.individual.net>

stef mientki wrote:
> Indeed, so I wondered why there isn't open source alternative (at
> least I didn't find one).

Have a look at scilab and octave. Not sure if it's GPL though.

Regards,


Bj?rn

-- 
BOFH excuse #387:

Your computer's union contract is set to expire at midnight.



From darien.watkins at gmail.com  Wed Sep 12 10:53:34 2007
From: darien.watkins at gmail.com (darien.watkins at gmail.com)
Date: Wed, 12 Sep 2007 14:53:34 -0000
Subject: Python Database Apps
In-Reply-To: <mailman.438.1189600804.2658.python-list@python.org>
References: <1189479130.905136.196820@r34g2000hsd.googlegroups.com>
	<mailman.387.1189521302.2658.python-list@python.org>
	<1189536987.259907.68650@e34g2000pro.googlegroups.com>
	<mailman.438.1189600804.2658.python-list@python.org>
Message-ID: <1189608814.932322.301950@22g2000hsm.googlegroups.com>

On Sep 12, 8:39 am, Ed Leafe <e... at leafe.com> wrote:
> On Sep 11, 2007, at 2:56 PM, darien.watk... at gmail.com wrote:
>
> > It's gonna be a desktop app.  The
> > database engine is going to be the critical component.  I like sqlite
> > so that I don't need a database server on the client side.  It would
> > help though if there is a way to sync between multiple clients to a
> > central server database.  That's the tough part.  To give you a better
> > idea of what i'm trying to do, I am trying to write an app where
> > multiple technicians have an issue tracker that is available both
> > offline and online.  I was looking to use sqlite as the local side
> > that would sync new and updated issues to a central server when
> > online.  Any technician may work on any issue.  Generally they will
> > not be working on the same issue at the same time.  The technicians
> > are geographically diverse (anywhere in the southeast US, not in an
> > office.)
>
>         As far as the server goes, you can't go wrong with PostgreSQL, as
> others have mentioned. I have more experience with MySQL, but their
> recent licensing changes have simply made it easier to go with
> Postgres, as I don't have to worry about which clause of which
> document I might be violating.
>
>         For the local data store, SQLite is far and away the best choice,
> since you don't have to use two types of data access, as you would if
> you went with SQL on the server and, say, pickling on the local.
>
>         If you create both data stores with the same structure, you can use
> UUIDs as your keys, along with a timestamp flag for records that are
> added or modified when disconnected so that you can re-sync later.
> You will have to handle conflicts (i.e., someone changed a record
> that another also changed while disconnected) on your own,
> implementing your own business logic to determine who "wins", and how
> the conflicted data is handled.
>
>         I'll close with a plug for our product: Dabo. It is a desktop
> application framework with support for SQLite, PostgreSQL, MySQL,
> Firebird and Microsoft SQL Server databases. For disconnected data,
> you would simply define a local connection (to SQLite) and a remote
> connection (to your server database), and switch between the two
> depending on whether you are disconnected or not. The framework will
> handle the rest, allowing you to focus on the stuff that is unique to
> your app, such as the conflict resolution and business logic.
>
> -- Ed Leafe
> --http://leafe.com
> --http://dabodev.com

Thanks for ideas Ed.  I am checking out dabo now.  I do have a few
questions about it.  Packaging.  Is it easy to package into a quick
install for windows.  The users are going to want to get too in
depth.  Second, data sources.  When I'm adding a data source to the
window in class designer, it always picks up the one I created (which
incidentally was a sample, my form for connection manager isn't
working at the moment.)  My idea is to have the the local sqlite
database as the only viewable data source, and the server side only
for syncing.  So they logon, sync up, sync down, and view.  I'm
worried about having to get them to install python, dabo, and the app.

Darien



From jcd at sdf.lonestar.org  Sat Sep 15 20:23:40 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Sat, 15 Sep 2007 20:23:40 -0400
Subject: string questions
In-Reply-To: <5l3a09F5v20uU2@mid.uni-berlin.de>
References: <mailman.597.1189900374.2658.python-list@python.org>
	<5l3a09F5v20uU2@mid.uni-berlin.de>
Message-ID: <46EC778C.60809@sdf.lonestar.org>

Marc 'BlackJack' Rintsch wrote:
> But please don't use the functions in `string` that are also available as
> methods on strings.  Those functions are deprecated.
>
>   
Meaning (for newbie clarification):

instead of string.upper(s2), just do s2.upper().  For more detail, see
the docs.





From bronger at physik.rwth-aachen.de  Wed Sep  5 16:15:01 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Wed, 05 Sep 2007 22:15:01 +0200
Subject: Any syntactic cleanup likely for Py3? And what about doc
	standards?
References: <46DEFD2E.5050205@sbcglobal.net>
	<mailman.112.1189022368.2658.python-list@python.org>
Message-ID: <87tzq898e2.fsf@wilson.homeunix.com>

Hall?chen!

Ferenczi Viktor writes:

> [...]
>
> Class decorators allows clean implementation of properties.
> Detailed description: http://www.python.org/dev/peps/pep-3129/
> Lets use a hypothetic library providing properties, for example:
>
> from property_support import hasProperties, Property
>
> @hasProperties
> class Sphere(object):
>     def setRadius(self, value):
>         ... some setter implementation ...
>     radius=Property(default=1.0, set=setRadius, type=(int, float))
>     color=Property(default='black', allowNone=True)
>
> This is a cleaner syntax if you need automatic default
> setter/getter implementations with type checking, default values,
> etc.

Well, I think @hasProperties is very ugly.  Such things always look
like a dirty trick.  The programmer wonders why the language cannot
detect by itself that there are properties in this class.  But
anyway ... would these properties finally be virtual?

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From cjw at sympatico.ca  Sun Sep 23 19:30:56 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Sun, 23 Sep 2007 19:30:56 -0400
Subject: __contains__() and overload of in : Bug or Feature ???
In-Reply-To: <1190383050.514560.232660@50g2000hsm.googlegroups.com>
References: <1190383050.514560.232660@50g2000hsm.googlegroups.com>
Message-ID: <fd6t0d$89k$1@sea.gmane.org>

sebastien.lannez at gmail.com wrote:
> Thanks for your quick response.
> 
>>> I need to overload the operator in and let him
>>> return an object ... It seems it is not a
>>> behavior Python expect :
>>>
>>>>>> class A:
>>> ...    def __contains__(self,a):
>>> ...        return 'yop'
>>> ...
>>>>>> a=A()
>>>>>> print 'toto' in a
>>> True
>>>>>> print a.__contains__('toto')
>>> yop
> 
>> Not sure what you're trying to achieve,
> 
> Using Python as an algebraic parser for
> symbolic mathematical equation and I need
> that the 'in' operator returns an object based
> on its two arguments.
> 
>> but the semantics of the "in" operator
>> make it return a boolean value.
> 
> That is why I need to overload it.
> 
>> The string "yop" evaluates to the boolean
>> value True, as it is not empty.
> 
> Does it means that when overloading an operator, python just
> wrap the call to the method and keep control of the returned
> values ??? Is there a way to bypass this wrapping ???
> 
Can you not achieve what you wish to do with a conditional
expression?

"yop" if a in b else "nop"

Colin W.



From pavlovevidence at gmail.com  Mon Sep 10 18:30:03 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Mon, 10 Sep 2007 15:30:03 -0700
Subject: Python syntax wart
In-Reply-To: <1189426067.777376.106470@r34g2000hsd.googlegroups.com>
References: <fbvvil$7dj$1@lust.ihug.co.nz>
	<1189405211.875217.176620@57g2000hsv.googlegroups.com>
	<1189426067.777376.106470@r34g2000hsd.googlegroups.com>
Message-ID: <1189463403.282658.266280@g4g2000hsf.googlegroups.com>

On Sep 10, 8:07 am, TheFlyingDutchman <zzbba... at aol.com> wrote:
> On Sep 9, 11:20 pm, TheFlyingDutchman <zzbba... at aol.com> wrote:
>
> > It may be that a language that doesn't have a statement terminator
> > (which can be end-of-line) needs a statement continuation symbol.
> > (Excluding languages like Lisp that have parentheses everywhere).
>
> Actually I guess Python does have a statement terminator - end-of-
> line.
> If you use end-of-line as your statement terminator it is difficult
> and maybe impossible
> to avoid a line-continuation character in those situations where you
> don't want
> an end-of-line to terminate your statement.

Well, a good chunk of line continuations can be done implicitly with
parentheses (one of the few places where implicit is better than
explicit).

Problem is, there are a few places where you might to break line that
parentheses aren't legal.  Back in the day, import statements were
like this, but the designers of Python artifically added the ability
to use parentheses there.  Nowadays, they're rarely needed.  One of
their main remaining uses is in opening multiline strings, like so:

mls = """\
This is line 1.
This is line 2.
I like all my lines lined up.
"""

The OP seems to be complaining that you can't arbitrarily break lines
in the middle of a statement, so that he can write ridiculously
formatted code.  It's not impossible to do what he asks; for example,
the following hypothetical code is not ambiguous.

for
     x
in
     range(10)
:
     print x

It isn't legal to end the statement anywhere before the colon, so it
would be possible to add a rule to Python's parser that says, "there
shall be implicit line continuations everywhere between the opening
keyword and the colon".

To be honest, I've always thought this would be a nice feature to
have, but now that I've seen what kind of abominations are possible
with it, I'm not so sure.

Carl Banks



P.S. The "two dimensional structure" can currently be done like this,
not that I believe such a travesty should ever be used in real code.

for(
    x
)in(
    range(10)
):
    print x



From michele.simionato at gmail.com  Wed Sep 19 06:52:14 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Wed, 19 Sep 2007 10:52:14 -0000
Subject: super() doesn't get superclass
In-Reply-To: <46f0fba0$0$29605$426a34cc@news.free.fr>
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au>
	<46f0fba0$0$29605$426a34cc@news.free.fr>
Message-ID: <1190199134.791808.267110@22g2000hsm.googlegroups.com>

On Sep 19, 12:36 pm, Bruno Desthuilliers <bruno.
42.desthuilli... at wtf.websiteburo.oops.com> wrote:

> The next class in the MRO *is* a superclass of the *instance*. Else it
> wouldn't be in the MRO !-)

Bruno, there is no such a thing as a superclass in a multiple
inheritance
world, and it is a very bad idea to continue to use that terminology.
I was
convinced of that by Bjorn Pettersen in a thread on comp.lang.python
in May 2003
and you may Google for it. You may find there convincing arguments
against the
superclass concept, some of which I report in
http://www.phyast.pitt.edu/~micheles/python/super.html

> Well, I understand that you disagree with both the documention and the
> name of super. As far as I'm concerned, the mere fact that this
> discussion happens is probably a sign that there's something to be fixed
> here - at least wrt documentation, possibly wrt/ naming. But the
> *feature* by itself is certainly something we do want to keep, whatever
> some may argue.

Well, I am personally *against* multiple inheritance (i.e. IMO it
gives more
troubles than advantages)
>
> The goal is to call the correct "next" method according to MRO. Indeed,
> it could have been name "call_next_method".

Right.

     Michele Simionato



From gh at gregor-horvath.com  Tue Sep 11 10:22:25 2007
From: gh at gregor-horvath.com (Gregor Horvath)
Date: Tue, 11 Sep 2007 16:22:25 +0200
Subject: newbie: stani's python editor if-else
In-Reply-To: <1189517164.302630.307850@w3g2000hsg.googlegroups.com>
References: <1189484688.520933.25000@22g2000hsm.googlegroups.com>
	<1189517164.302630.307850@w3g2000hsg.googlegroups.com>
Message-ID: <22fd7$46e6a4a2$547078de$31885@news.chello.at>

kyosohma at gmail.com schrieb:

> I agree with Steve. I have yet to see an IDE for Python (or anything
> else) that unindents statements. Even IDLE, the Official IDE for
> Python, doesn't do that.


emacs in python-mode

Just hit TAB and it unindents "else" in the given example.
Hit TAB again and it cylces in the possible indentations.

Gregor


From mal at egenix.com  Fri Sep 28 13:37:29 2007
From: mal at egenix.com (M.-A. Lemburg)
Date: Fri, 28 Sep 2007 19:37:29 +0200
Subject: FW: OCBC connection
In-Reply-To: <8FDC0F9BE1F91D44BE964AA54AAA67B629B61E8F@wilmexm3.ad.analog.com>
References: <8FDC0F9BE1F91D44BE964AA54AAA67B629B61E8F@wilmexm3.ad.analog.com>
Message-ID: <46FD3BD9.6080405@egenix.com>

On 2007-09-28 19:22, Sugrue, Sean wrote:
> Is this the right email list to be on for asking rather elementary
> python questions?
> If not do you have a suggestion

It's the right place, indeed :-)

Here's an example using mxODBC:

# mxODBC is available from http://www.egenix.com/products/python/mxODBC/:

# On Windows:
from mx.ODBC import Windows as Database

# On Mac OS X:
from mx.ODBC import iODBC as Database

# On Linux/BSD/etc.:
from mx.ODBC import unixODBC as Database
# or
from mx.ODBC import iODBC as Database

# Open a connection to the database
connection = Database.DriverConnect('DSN=<datasourcename>;'
                                    'UID=<username>;'
                                    'PWD=<password>;'
                                    'KEYWORD=<value>')
# replace the values accordingly, add new keyword-value pairs as
# necessary for your data source; data sources are configured
# in the ODBC manager

# Create a cursor; this is used to execute commands
cursor = connection.cursor()

# Create a table
cursor.execute('CREATE TABLE mxodbcexample1 '
               ' (id integer, name varchar(10), data varchar(254))')
# this command does not create a result set, so there's nothing
# to fetch from the database; however in order to make the
# change permanent, we need to commit the change
connection.commit()

# Prepare some data rows to add to the table, ie. a list of tuples
rows = []
for i in range(42):
    name = 'name-%i' % i
    data = 'value-%i' % i
    rows.append((i, name, data))

# Add the data in one go; the values from the tuples get assigned
# to the ?-mark parameter markers in the SQL statement based on
# their position and the SQL statement is executed once for
# each tuple in the list of rows
cursor.executemany('INSERT INTO mxodbcexample1 VALUES (?,?,?)',
                   rows)

# If you apply changes to the database, be sure to commit or
# rollback your changes; a call to .commit() or .rollback()
# will implicitly start a new transaction
connection.commit()

# Now fetch some data rows
from_id = 40
to_id = 42
cursor.execute('SELECT * FROM mxodbcexample1'
               ' WHERE (id >= ?) and (id < ?)',
               (from_id, to_id))

# Fetch the results
for i, row in enumerate(cursor.fetchall()):
    print 'Row %i: %r' % (i, row)

# Remove the table again
cursor.execute('DROP TABLE mxodbcexample1')
connection.commit()

# Close the connection
connection.close()

Regards,
-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, Sep 28 2007)
>>> Python/Zope Consulting and Support ...        http://www.egenix.com/
>>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
>>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

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


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


> Sean 
> 
> -----Original Message-----
> From: python-list-bounces+sean.sugrue=analog.com at python.org
> [mailto:python-list-bounces+sean.sugrue=analog.com at python.org] On Behalf
> Of Sugrue, Sean
> Sent: Friday, September 28, 2007 10:58 AM
> To: python-list at python.org
> Subject: OCBC connection
> 
> I'm trying to make an odbc connection to postgresql which is on a server
> using python.
> Does anyone have a code snippet to make a basic connection with a select
> query?
> 
> Sean
> --
> http://mail.python.org/mailman/listinfo/python-list



From Shawn at Milochik.com  Tue Sep 25 15:07:59 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Tue, 25 Sep 2007 15:07:59 -0400
Subject: [Tutor] Take if offline
In-Reply-To: <82b4f5810709251202y4924204bw2f79f97a1f44c09@mail.gmail.com>
References: <7941B2693F32294AAF16C26B679A258D0D805E@csomb01.corp.atmel.com>
	<46F959CA.9080806@tds.net>
	<82b4f5810709251202y4924204bw2f79f97a1f44c09@mail.gmail.com>
Message-ID: <2dc0c81b0709251207g15b6b5e6g64309b155193186@mail.gmail.com>

Since everyone else is replying to the list, I'll (top) post this:

No, not really. He had to give everyone the rule once. Otherwise, he'd
have to do it a hundred times a day, and monitor every single post to
find out who he had to inform. He'd end up doing not much else with
his life, and would flee to a monastery and give up coding forever.
You wouldn't want that to happen, would you?




On 9/25/07, Michael Langford <mlangford.cs03 at gtalumni.org> wrote:
> I agree with Kent...
>
> --
> Michael Langford
> Phone: 404-386-0495
> Consulting: http://www.TierOneDesign.com/
> Entertaining:
> http://www.ThisIsYourCruiseDirectorSpeaking.com
>
>
> On 9/25/07, Kent Johnson <kent37 at tds.net> wrote:
> > Hansen, Mike wrote:
> > > Anytime someone posts in HTML, or posts without a subject, or
> > > accidentally
> > > hijacks a thread, or top-posts, or writes in caps, a couple of posters
> > > pop up
> > > and complain. Rather than posting to the entire list, I think it'd be
> > > best if
> > > you send your complaint directly to the "offending" user. I'd prefer to
> > > read
> > > about Python not read lessons in net/mail-list etiquette.
> >
> > Hmmm. So instead, whenever someone complains about netiquette on-list we
> > should post on-list complaining about it? I'm not sure that improves the
> > situation any, especially if it sparks a discussion. Perhaps you should
> > email your suggestion privately to the offending parties. :-)
> >
> > I definitely think this list is about how to be part of the Python
> > community, as well as how to program in Python. Knowing how to
> > participate in a mailing list is part of that. Maybe you could just skip
> > those posts, there are not that many of them.
> >
> > Kent
> > _______________________________________________
> > Tutor maillist  -  Tutor at python.org
> > http://mail.python.org/mailman/listinfo/tutor
> >
>
>
> _______________________________________________
> Tutor maillist  -  Tutor at python.org
> http://mail.python.org/mailman/listinfo/tutor
>
>


-- 
Please read:
http://milocast.com/2007/07/31/this-i-believe/


From steve at holdenweb.com  Mon Sep 17 14:38:18 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 17 Sep 2007 14:38:18 -0400
Subject: how to join array of integers?
In-Reply-To: <87hcltnv2z.fsf@rudin.co.uk>
References: <1189859762.563599.269270@g4g2000hsf.googlegroups.com>	<a23effaf0709150551g19c611eqe1c912acf02306d3@mail.gmail.com>	<mailman.577.1189864628.2658.python-list@python.org>	<13eos6ihf2mjg4a@corp.supernews.com>
	<87lkb6o4bx.fsf@rudin.co.uk>	<13erbtbos7ld123@corp.supernews.com>
	<87hcltnv2z.fsf@rudin.co.uk>
Message-ID: <fcmhip$p0o$1@sea.gmane.org>

Paul Rudin wrote:
> Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> writes:
> 
>> On Sun, 16 Sep 2007 19:25:22 +0100, Paul Rudin wrote:
>>
>>>> The generator expression takes about twice as long to run, and in my
>>>> opinion it is no more readable. So what's the advantage?
>>> If you do it with a decent size list they take more or less the same
>>> time. 
>> Did you try it, 
> 
> Yes.
> 
>> or are you guessing? 
> 
> Well - I guessed first, otherwise it wouldn't have been worth trying :)
> 
>> What do you call a decent size?
> 
> I used 10,000.
> 
>>
>>> You'd presumably expect the generator to use less memory; which
>>> might be an advantage if you have large lists.
>> Unfortunately, Python doesn't make it as easy to measure memory use as it 
>> does to time snippets of code, so that's just a hypothetical.
> 
> Well - as it turns out the list gets made anyway by the join method,
> so in this case there's probably little difference. However there
> (obviously) are siturations where a generator is going to save you a
> significant memory over the similar list comprehension.
> 
>>
>>> Isn't it odd that the generator isn't faster, since the comprehension
>>> presumably builds a list first and then iterates over it, whereas the
>>> generator doesn't need to make a list?
>> Who says it doesn't need to make a list? string.join() needs a sequence.
>>
> 
> The generator doesn't make a list. The implementation of str.join does
> apparently needs a sequence and so makes a list from the generator
> passed to it, which is presumably why you get essentially the same
> performance once you factor out setup noise for small lists.
> 
> Although it's not clear to me why the join method needs a sequence
> rather than just an iterator.

I suspect it's to do with making memory allocation easier, though I 
didn't read the whole gory detail in stringobject.c. Without a 
pre-existing set of joinable items you have to build the string up using 
some sort of allocate-and-reallocate strategy, whereas if you have the 
joinables already in a sequence you can pre-compute how much memory the 
result will need.

Ah, right, it's in the comment:

          * Do a pre-pass to figure out the total amount of space we'll
          * need (sz), see whether any argument is absurd, and defer to
          * the Unicode join if appropriate.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From Shawn at Milochik.com  Fri Sep 14 09:59:36 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Fri, 14 Sep 2007 09:59:36 -0400
Subject: [Tutor] list iteration question for writing to a file on disk
In-Reply-To: <BAY111-W57740F9C97F963177C59CF3BC0@phx.gbl>
References: <BAY111-W4C4ABD47B42DBA13A2AC6F3C00@phx.gbl>
	<46E563DA.4090106@umn.edu>
	<BAY111-W228603CCC24C3A84144F5AF3C30@phx.gbl>
	<46E95D8E.7070801@tds.net>
	<BAY111-W1005A75AD89BC967012FEAF3C30@phx.gbl>
	<46E99CEE.3030304@tds.net>
	<BAY111-W57740F9C97F963177C59CF3BC0@phx.gbl>
Message-ID: <2dc0c81b0709140659j702c997fkbefc412a09cd53c4@mail.gmail.com>

When you use "print," it automatically adds a newline (\n).

You can avoid this by following the print line with a comma:

print j,

Or rstrip() the line before printing. Either way.


From bvukov at yahoo.com  Sat Sep 29 03:34:38 2007
From: bvukov at yahoo.com (bvukov at yahoo.com)
Date: Sat, 29 Sep 2007 00:34:38 -0700
Subject: Reentrancy of Python interpreter
In-Reply-To: <mailman.1260.1191015110.2658.python-list@python.org>
References: <mailman.1260.1191015110.2658.python-list@python.org>
Message-ID: <1191051278.075475.128020@o80g2000hse.googlegroups.com>

On Sep 28, 11:31 pm, Brad Johnson <Brad.John... at ballardtech.com>
wrote:
> I have embedded a single threaded instance of the Python interpreter in my
> application.
>
> I have a place where I execute a Python command that calls into C++ code which
> then in turn calls back into Python using the same interpreter. I get a fatal
> error which is "PyThreadStage_Get: no current thread."
>
> I guess I understand why I can't have two invocations of the same interpreter
> thread in one call stack, but how would I go about solving this?

Looks like ( from PyThreadStage_Get error ) that you lost the GIL. You
probably
entered some C++ code and encapsulated you're work in the

Py_BEGIN_ALLOW_THREADS
<code>
Py_END_ALLOW_THREADS

but you're <code> is calling back the Python function, and you forgot
to acquire
back the GIL.



From zzbbaadd at aol.com  Thu Sep 20 00:42:43 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Wed, 19 Sep 2007 21:42:43 -0700
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
In-Reply-To: <mailman.786.1190246955.2658.python-list@python.org>
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<fcq352$u0a$1@sea.gmane.org>
	<mailman.786.1190246955.2658.python-list@python.org>
Message-ID: <1190263363.496695.83300@57g2000hsv.googlegroups.com>

On Sep 19, 5:08 pm, "Terry Reedy" <tjre... at udel.edu> wrote:
> "Terry Reedy" <tjre... at udel.edu> wrote in message

This is a little confusing because google groups does not show your
original post (not uncommon for them to lose a post in a thread - but
somehow still reflect the fact that it exists in the total-posts
number that they display) that you are replying to.


>
> This assumes that comparing versions of 1.5 is still relevant.  As far as I
> know, his patch has not been maintained to apply against current Python.
> This tells me that no one to date really wants to dump the GIL at the cost
> of half Python's speed.  Of course not.  The point of dumping the GIL is to
> use multiprocessors to get more speed!  So with two cores and extra
> overhead, Stein-patched 1.5 would not even break even.
>
> Quad (and more) cores are a different matter.  Hence, I think, the
> resurgence of interest.

I am confused about the benefits/disadvantages of the "GIL removal".
Is it correct that the GIL is preventing CPython from having threads?

Is it correct that the only issue with the GIL is the prevention of
being able to do multi-threading?

If you only planned on writing single-threaded applications would GIL-
removal have no benefit?

Can threading have a performance benefit on a single-core machine
versus  running multiple processes?

> So now this question for you:  "CPython 2.5 runs too slow in 2007: true or
> false?"

I guess I gotta go with Steven D'Aprano - both true and false
depending on your situation.

> If you answer false, then there is no need for GIL removal.

OK, I see that.

> If you answer true, then cutting its speed for 90+% of people is bad.

OK, seems reasonable, assuming that multi-threading cannot be
implemented without a performance hit on single-threaded applications.
Is that a computer science maxim - giving an interpreted language
multi-threading will always negatively impact the performance of
single-threaded applications?

>
> | Most people are not currently bothered by the GIL and would not want its
> | speed halved.
>
> And another question: why should such people spend time they do not have to
> make Python worse for themselves?
>
Saying they don't have time to make a change, any change, is always
valid in my book. I cannot argue against that. Ditto for them saying
they don't want to make a change with no explanation. But it seems if
they make statements about why a change is not good, then it is fair
to make a counter-argument. I do agree with the theme of Steven
D'Aprano's comments in that it should be a cordial counter-argument
and not a demand.




From daniel.j.larsson at gmail.com  Tue Sep  4 18:29:11 2007
From: daniel.j.larsson at gmail.com (Daniel Larsson)
Date: Wed, 5 Sep 2007 00:29:11 +0200
Subject: doctest and decorators
In-Reply-To: <200709050009.46380.python@cx.hu>
References: <2bfa72fa0709041329i14b5b547i2eb85250f7547da@mail.gmail.com>
	<200709042316.08263.python@cx.hu>
	<2bfa72fa0709041452o72d9a98fp939852d061a2cda3@mail.gmail.com>
	<200709050009.46380.python@cx.hu>
Message-ID: <2bfa72fa0709041529g9d5ac22hce3a55d5357b1a1c@mail.gmail.com>

On 9/5/07, Ferenczi Viktor <python at cx.hu> wrote:
>
> > > @functools.wraps(f)
> > > Pass the function to be wrapped by the decorator to the wraps
> function.
> > Ooops, right. That doesn't change the fact that decorated functions get
> > hidden from doctest though.


I have no issue when the decorator is defined in the same module as the
decorated function, my problem is running doctests on functions using an
imported decorator. Having to implement the decorator in every source module
isn't very practical. Try splitting your module in two, as I did, and run
with -v, and you'll see the problem.

Run my test script (one file) with the -v (verbose) option. Without the -v
> option it does not show output. This fact is documented in the Python
> manual
> at the doctest module.
>
> --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
> import functools
>
> def simplelog(f):
>     @functools.wraps(f)
>     def new_f(*args, **kwds):
>         print "Wrapper calling func"
>         return f(*args, **kwds)
>     return new_f
>
> @simplelog
> def test():
>     """
>     >>> test()
>     Wrapper calling func
>     'works!'
>     """
>     return 'works!'
>
> def fn():
>     """
>     >>> fn()
>     'ok'
>     """
>     return 'ok'
>
> if __name__ == '__main__':
>     import doctest
>     doctest.testmod()
> --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
>
> Regard, Viktor
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From gregpinero at gmail.com  Sat Sep 22 23:28:49 2007
From: gregpinero at gmail.com (gregpinero at gmail.com)
Date: Sun, 23 Sep 2007 03:28:49 -0000
Subject: subprocess -popen - reading stdout from child - hangs
Message-ID: <1190518129.356844.242710@19g2000hsx.googlegroups.com>

Let's say I have this Python file called loop.py:

import sys
print 'hi'
sys.stdout.flush()
while 1:
    pass

And I want to call it from another Python process and read the value
'hi'.  How would I do it?

So far I have tried this:

>>> proc = subprocess.Popen('python /home/chiefinnovator/loop.py',shell=True,stdin=subprocess.PIPE,stdout=subprocess.PIPE)
>>> proc.stdout.read()

But it just hangs at read()

proc.communicate() also just hangs.  What am I doing wrong?  Please
advise.

Thanks,

Greg



From marco_347 at yahoo.it  Fri Sep  7 11:18:05 2007
From: marco_347 at yahoo.it (marco_347 at yahoo.it)
Date: Fri, 07 Sep 2007 08:18:05 -0700
Subject: debugging program that uses ctypes
Message-ID: <1189178285.647177.216320@g4g2000hsf.googlegroups.com>

hi all, I have a python program that calls a dll through ctypes
(py2.5). In some (reproducible)
conditions the program crashes with an error in ctypes module.
How can I trace down the problem? I have created a debug build of
python but I also use pyodbc
and dateutil libraries in my program and I don't know how to make them
visible to python_d.exe
Am I using the right approach?

thanks in advance for hints,
Marco



From RJNauman at uss.com  Wed Sep  5 07:45:06 2007
From: RJNauman at uss.com (Ryan J Nauman)
Date: Wed, 5 Sep 2007 07:45:06 -0400
Subject: Help me understand this script
Message-ID: <OF516F31FE.31225D80-ON8525734D.00405FE1-8525734D.00408DB0@notes.uss.com>

Can someone help me understand this script please?
I understand everything except for the anagram function.  Could you break 
it down into more than 1 line of code for me or explain it? (I understand 
WHAT it does but HOW?) Thanks.

Script >>

###
# SCRABBLE.PY
#
# purpose: 
#       find usable "bingos" based on your rack
#
# usage:
#       python scrabble.py eilsnsy
#
# output:
# Straight anagrams: 
#  linseys
#  lysines
# Possible other words: 
# + B
#   sensibly
#+ K
#   skylines
#+ V
#   sylvines
###
# Scrabble is a registered trademark of J. W. Spear & Son PLC and 
# Hasbro Inc. Any and all uses of the word "Scrabble" in this code
# refers to this trademark.
#
# This code is not affiliated with any company.
###

import sys

WORDS = [ i.rstrip ().lower() for i in file ('c:\python25\TWL06.txt') ]
# you can download the current TWL and/or SOWPODS dictionaries from 
# http://67.19.18.90/twl.zip and http://67.19.18.90/sowpods.zip . 
# Update the file name above as appropriate if you want to use a "proper"
# Scrabble dictionary.



def alphabetise(word):
    x = [i for i in word]
    x.sort()
 
    return "".join(x)

def anagram(word):
    wordLength = len(word)
    sortedWord = alphabetise(word.lower())
    return [i for i in WORDS if len(i) == wordLength and alphabetise(i) == 
sortedWord]

for word in sys.argv[1:]:
    print "Straight anagrams: "
    for i in anagram(word):
        print "  " + i
    print "Possible other words: "
    for i in "ABCDEFGHIJKLMNOPQRSTUVWXYZ":
        a = anagram(i + word)
        if a:
            print "+", i
            for h in a:
                print "  ", h

<< End script
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From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Sep 21 11:09:21 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 21 Sep 2007 17:09:21 +0200
Subject: An Editor that Skips to the End of a Def
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk> <fd0au1$fro$1@lust.ihug.co.nz>
	<5lhs4pF8bkunU1@mid.individual.net> <46F3BEA3.8080100@web.de>
Message-ID: <5li551F87hfcU1@mid.individual.net>

Stefan Behnel wrote:
> Bjoern Schliessmann wrote:
>> Lawrence D'Oliveiro wrote:

>>> <http://ars.userfriendly.org/cartoons/
>>> ?id=20070910&mode=classic>. 
>>
>> Esc-Meta-Alt-Ctrl-Shift? :)
> 
> Yep, that's five of them.

I'd also have mentioned Caps Lock, Alt Gr, Compose and Sysrq if
there was no deeper meaning in what I wrote.

Regards,


Bj?rn

-- 
BOFH excuse #25:

Decreasing electron flux



From jstroud at mbi.ucla.edu  Fri Sep 14 16:23:51 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 14 Sep 2007 13:23:51 -0700
Subject: An ordered dictionary for the Python library?
In-Reply-To: <1189800045.642278.313860@o80g2000hse.googlegroups.com>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<7xzlzrtrjn.fsf@ruckus.brouhaha.com>
	<1189664832.876539.86800@k79g2000hse.googlegroups.com>
	<7xps0mmig9.fsf@ruckus.brouhaha.com>
	<1189733708.659317.83950@y42g2000hsy.googlegroups.com>
	<1189753968.917636.310120@19g2000hsx.googlegroups.com>
	<fcemqi$g76$1@daisy.noc.ucla.edu>
	<1189800045.642278.313860@o80g2000hse.googlegroups.com>
Message-ID: <fceq87$ivr$1@daisy.noc.ucla.edu>

Mark Summerfield wrote:
> I guess I'll have to rename my module (although unfortunately, my book
> has just gone into production and I have a (simpler) example of what I
> considered to be an ordered dict, so I will be adding to the
> terminology confusion). That notwithstanding, given that it is a
> sorteddict, how is the API?

I must think the API good because I have been implementing, in parallel 
with this discussion, my own "OrderedDict" with a very similar API (this 
is part of a larger project where I recently found the need to have a 
well-implemented ordered dict). The only real omission I see is to allow 
instantiating a "sorted dict" with an optional cmp function--to allow 
the generalization of such features as case-independence, etc.

James


From carsten at uniqsys.com  Wed Sep  5 22:56:23 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Wed, 05 Sep 2007 22:56:23 -0400
Subject: Give List to Format String - How To
In-Reply-To: <1189046828.313284.235210@o80g2000hse.googlegroups.com>
References: <1189046828.313284.235210@o80g2000hse.googlegroups.com>
Message-ID: <1189047383.3231.3.camel@localhost.localdomain>

On Thu, 2007-09-06 at 02:47 +0000, gregpinero at gmail.com wrote:
> I might just be being dumb tonight, but why doesn't this work:
> 
> >>> '%s aaa %s aa %s' % ['test' for i in range(3)]
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> TypeError: not enough arguments for format string

To format multiple objects, the right operand must be a tuple. A list is
not a tuple, so '%' only sees one argument. You want something like
this:

>>> '%s aaa %s aa %s' % tuple('test' for i in range(3))
'test aaa test aa test'

HTH,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From semanticist at gmail.com  Thu Sep 13 17:00:59 2007
From: semanticist at gmail.com (Miles)
Date: Thu, 13 Sep 2007 17:00:59 -0400
Subject: sys.argv index out of range error
In-Reply-To: <93066C069973ED448DC2BCEA9C44A7383BE33A@efmailx>
References: <93066C069973ED448DC2BCEA9C44A7383BE33A@efmailx>
Message-ID: <a49e45f50709131400y2a645eccwf0b4803c1f4a428b@mail.gmail.com>

On 9/13/07, Brian McCann wrote:
> bootstrap.sh
> #!/bin/sh
> cd /home/workspaces
> export LANG="en_US.UTF-8"
>
> source init $1
> test.py $2
> #################################
>
> what's wrong with  the line "source init $1  ?

Assuming your /bin/sh is actually the Bourne-again shell, this excerpt
from the Bash manual explains what's happening ("source" is a synonym
for "."):

"""
. filename [arguments]
Read and execute commands from the filename argument in the current
shell context. [...] If any arguments are supplied, they become the
positional parameters when filename is executed. Otherwise the
positional parameters are unchanged.
"""

So "source [script] [args]" clobbers the parameters of the *current*
shell context.  So any of these should work:
* use "source init.sh" to use the same shell context;
* use "./init.sh $1" to use a new context; or
* save the needed parameters in other variables before clobbering them.

-Miles


From zzbbaadd at aol.com  Thu Sep 13 12:43:13 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Thu, 13 Sep 2007 09:43:13 -0700
Subject: Python 3K or Python 2.9?
In-Reply-To: <5ksoaoF5am8cU1@mid.individual.net>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<5ksoaoF5am8cU1@mid.individual.net>
Message-ID: <1189701793.466307.93210@g4g2000hsf.googlegroups.com>


>
> > Here is a link to a tutorial where Sun is talking about the this
> > reference:
> >http://java.sun.com/docs/books/tutorial/java/javaOO/thiskey.html
>
> That's a tutorial for getting you started, no reference
> documentation or in-depth course.
>
Here's a FAQ item where they refer to it as I think Python should have
done it - a special predefined variable:

http://www.faqs.org/docs/javap/c5/s5.html

"Java provides a special, predefined variable named "this" that you
can use for such purposes. The variable, this, is used in the source
code of an instance method to refer to the object that contains the
method. This intent of the name, this, is to refer to "this object,"
the one right here that this very method is in. If x is an instance
variable in the same object, then this.x can be used as a full name
for that variable. If otherMethod() is an instance method in the same
object, then this.otherMethod() could be used to call that method.
Whenever the computer executes an instance method, it automatically
sets the variable, this, to refer to the object that contains the
method."



"this" is hard to query on but I would be interested in seeing some
site talking about Java where "this" is mentioned as being "passed
in".





From gandalf at shopzeus.com  Wed Sep 12 16:09:30 2007
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Wed, 12 Sep 2007 22:09:30 +0200
Subject: I want py2exe not to create library.zip
Message-ID: <46E8477A.6000507@shopzeus.com>


  Hi,

I want py2exe not to create library.zip. My reason is that the installed 
program will be a self updating program, and it must be able to download 
changes (newer python source files) from the server. So the files should 
not be in library.zip. I tried the --bundle option but apparently it can 
only be used to make the distribution __more__ bundled.

Thanks,

   Laszlo



From Scott.Daniels at Acm.Org  Wed Sep 26 22:41:48 2007
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Wed, 26 Sep 2007 19:41:48 -0700
Subject: Tkinter / Tk 8.5
In-Reply-To: <pan.2007.09.26.20.31.31.424223@vscht.cz>
References: <pan.2007.09.26.20.31.31.424223@vscht.cz>
Message-ID: <13fm60kbhr28fa8@corp.supernews.com>

Michal Bozon wrote:
> Today has been released a first beta of Tk 8.5, including a Ttk
> (tile) style engine, which makes possible the native look
> of widgets on MS platform, without having to install any extension.
> 
> Is there a chance it will be included in 2.5.x, 2.6 or 3.0 ?

This is just a guess, but:
    The beta: no way for anything.
    2.5.x: also very unlikely
    2.6: unlikely unless release is _soon_ (first alpha of 2.6 is out)
    3.0: much more likely, 3.0 won't be out for some time.

-Scott David Daniels
Scott.Daniels at Acm.Org


From see at signature.invalid  Mon Sep 17 19:41:44 2007
From: see at signature.invalid (Nigel Rowe)
Date: Mon, 17 Sep 2007 23:41:44 GMT
Subject: Python "with"
References: <fck2di$7to$1@ss408.t-com.hr> <fcleos$2rt$1@news2.u-psud.fr>
	<fclikb$blt$1@news2.carnet.hr> <fclom8$8h6$1@news2.u-psud.fr>
	<13et3kv409e355d@corp.supernews.com>
Message-ID: <YgEHi.19212$tu2.2648@fe09.news.easynews.com>

On Tue, 18 Sep 2007 00:26, Grant Edwards wrote in comp.lang.python
<<13et3kv409e355d at corp.supernews.com>>:

> On 2007-09-17, Laurent Pointal <laurent.pointal at limsi.fr> wrote:
> 
>> Note3: Its funny to see how Python users tries to change the
language, 
>> does this occure with C, C++, Java, C# ?
> 
> Yes.  I remember somebody I worked with once who write a C
> program using a whole pile of macros to make it look like BASIC:
> 
> #define IF  if (
> #define THEN ) {
> #define ELSE } else {
> #define ENDIF }
> 
> and so on...
> 

and latin speaking perl programmers use Lingua::Romana::Perligata
<http://www.csse.monash.edu.au/~damian/papers/HTML/Perligata.html>

Totaly insane.  Oh, wait, they're perl programmers.

-- 
        Nigel Rowe
        A pox upon the spammers that make me write my address like..
                rho (snail) fisheggs (stop) name


From fakeaddress at nowhere.org  Sun Sep 23 15:28:08 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Sun, 23 Sep 2007 19:28:08 GMT
Subject: database persistence with mysql, sqlite
In-Reply-To: <1190502677.970811.181100@22g2000hsm.googlegroups.com>
References: <1190502677.970811.181100@22g2000hsm.googlegroups.com>
Message-ID: <c7zJi.35228$RX.15371@newssvr11.news.prodigy.net>

coldpizza wrote:
> I want to run a database query and then display the first 10 records
> on a web page. Then I want to be able to click the 'Next' link on the
> page to show the next 10 records, and so on.

> My question is how to implement paging, i.e. the 'Next/Prev' NN
> records without reestablishing a database connection every time I
> click Next/Prev? Is it at all possible with cgi/mod_python?

Caching database connections works in mod_python; not so
much with cgi.

> For example, in a NON-web environment, with sqlite3 and most other
> modules, I can establish a database connection once, get a cursor
> object on which I run a single 'SELECT * FROM TABLE' statement and
> then use cursor.fetchmany(NN) as many times as there are still results
> left from the initial query.
> 
> How do I do the same for the web? 

Short answer: you don't. It would mean saving cursors with
partial query results, and arranging for incoming requests to
go to the right process. Web-apps avoid that kind of thing.
Many web toolkits offer session objects, but do not support
saving active objects such as cursors. That said, I've
never tried what you proposing with the tools you name.

Depending on how your database handles transactions, an
open cursor can lock-out writers, and even other readers.
How long do you keep it around if the user doesn't return?

What should happen if the user re-loads a page from a few
sets-of-10 back?


> I am not using any high-level
> framework. I am looking for a solution at the level of cgi or
> mod_python (Python Server Pages under Apache). To call
> cursor.fetchmany(NN) over and over I need to pass a handle to the
> database connection but how do I keep a reference to the cursor object
> across pages? I use mysql and sqlite3 as databases, and I am looking
> for an approach that would work with both database types (one at a
> time). So far I have successfully used the following modules for
> database access: sqlite3, mysqld, and pyodbc.
> 
> So far, with mysql I use 'SELECT * FROM TABLE LIMIT L1, L2' where L1
> and  L2 define the range for the 'Next' and 'Previous' commands. I
> have to run the query every time a click a 'Next/Prev' link. 

You might want to run that query by a MySQL expert.

The basic method is nice in that it needs no server-side
state between requests. (It's a little squirrely in that
it can show a set of records that was never the contents
of the table.)


> But I am
> not sure that this is the best and most efficient way. I suppose using
> CURSOR.FETCHMANY(NN) would probably be faster and nicer but how do I
> pass an object reference across pages? Is it possible without any
> higher-level libraries?

Do you know that you have a performance problem? If so do
you know that it is due to too many cursor.execute() calls?
Keeping partially-executed queries is way down on the list
of optimizations to try.

> What would be the proper way to do it on a non-enterprise scale?

With mod_python, you can cache connections, which may help.
If you use "ORDER BY" with "LIMIT", the right index can make
a big difference.

Have you considered implementing your 'Next/Prev' commands
on the browser side with Javascript? The server could then
get all the records in one query, and the user would see
point-in-time correct results.

Another possibility is to the get all the query results and
save them in a session object, then deal them out a few at
a time. But as a rule of thumb, the less state on the server
the better.


> Would SqlAlchemy or SqlObject make things easier with regard to
> database persistence?

Quite likely, but probably not in the way you propose.
The web frameworks that use those toolkits try to do
things in robust and portable ways.


-- 
--Bryan


From bdesth.quelquechose at free.quelquepart.fr  Sat Sep 22 08:33:19 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 22 Sep 2007 14:33:19 +0200
Subject: Can a base class know if a method has been overridden?
In-Reply-To: <1190661185.359967.78610@w3g2000hsg.googlegroups.com>
References: <1190647436.423328.217670@w3g2000hsg.googlegroups.com>
	<46f7d897$0$25150$426a74cc@news.free.fr>
	<1190648887.051630.168520@r29g2000hsg.googlegroups.com>
	<46f7e8df$0$21052$426a74cc@news.free.fr>
	<1190661185.359967.78610@w3g2000hsg.googlegroups.com>
Message-ID: <46f81e39$0$27759$426a34cc@news.free.fr>

Ratko a ?crit :
 > bruno a ?crit
>>Another solution is to compare the functions wrapped by the methods:
>>
>>class EvtHandler:
>>     def __init__(self):
>>         onKey = getattr(self, 'onKey')
>>         if onKey.im_func is EvtHandler.onKey.im_func:

s/is/is not/, of course

>>              register_for_key_events()
>>
>>      def onKey(self):
>>         pass
>>
>>class MyHandler(EvtHandler):
>>     def onKey(self):
>>         # do something here....
>>
>>HTH
> 
> 
> The second solution works beautifully! 

Hem... Almost !-)

> Thank you very much.
> I was aware that not implementing the onKey method in the first place
> is the simplest solution but it's much cleaner to offer the methods in
> advance so that the user can see what is possible.

Yeps - a placeholder 'abstract' method with only a docstring. It's a 
common pattern in frameworks, but usually it's just an ordinary template 
method pattern defaulting to a no-op.

FWIW, if you have several such methods to handle, you can use a more 
generic approach:

_handlers = {
     'onKey':registerForKeyEvents,
     'onClick':registerForMouseEvents,
} # etc

class EventHandler(object):
     for _name in _handlers:
         exec "%s=lambda self, *args, **kw: pass" % _name

     def __new__(cls, *args, **kw):
        obj = object.__new__(cls, *args, **kw)
        for name, register_func in _handlers.items():
            meth = getattr(obj, name)
            dummy = getattr(EventHandler, name)
            if meth.im_func is not dummy.im_func:
                 register_func(meth)
        return obj


HTH


From gagsl-py2 at yahoo.com.ar  Thu Sep  6 22:39:59 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 06 Sep 2007 23:39:59 -0300
Subject: interesting puzzle......try this you will be rewarded...
References: <1189072576.997085.32360@r29g2000hsg.googlegroups.com>
	<46e04138$0$16377$88260bb3@free.teranews.com>
	<IcYDi.1436$4J3.235@newssvr22.news.prodigy.net>
	<1189130241.529344.52950@57g2000hsv.googlegroups.com>
Message-ID: <op.tx9i0xq0x6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 06 Sep 2007 22:57:21 -0300, Basilisk96 <basilisk96 at gmail.com>  
escribi?:

> I got to 14 :)
>
> It's rather silly.
>
> I remember seeing a more elaborate puzzle that involved coding,
> cryptography knowledge, etc. to get through it. But what was the link,
> I forget now...

Me too, and I can't find that link either.
#15 is a bit difficult for people outside US, and spelling on #21 is  
questionable, but I liked this woody thing :)

-- 
Gabriel Genellina



From naufraghi at develer.com  Mon Sep 17 11:22:41 2007
From: naufraghi at develer.com (Matteo Bertini)
Date: Mon, 17 Sep 2007 17:22:41 +0200
Subject: ANNOUNCE: PyQt3Support r1 - Python bindings for Qt3Support
Message-ID: <46EE9BC1.20500@develer.com>

#### PyQt3Support - Python bindings for Qt3Support ####

http://www.develer.com/oss/PyQt3Support

#### What is this?

PyQt3Support is an extension to PyQt4 that adds bindings to Qt's
Qt3Support library for usage from the Python language.

This is very helpful to migrate existing PyQt3 applications to PyQt4.

#### Why?

Porting from Qt3 to Qt4 can be tedious and bug-prone.

For C++ programmers, Trolltech provides a library, called Qt3Support,
that immensely helps. With Qt3Support, a C++ programmer basically only
needs mechanical changes to your source code. The library is made of two
different parts:

    * A new family of widgets (Q3*) with the same API of Qt3.
    * New member functions (or overloads) within standard Qt4 widgets.

For Python programmers, the situation is worse: PyQt4 does not bind
Qt3Support to Python. Developers of PyQt3 are forced to manually upgrade
their code to PyQt4, class by class.

This package fills the gap. By providing a new module PyQt4.Qt3Support,
it enables PyQt3 developers to access Trolltech's migration library, and
thus upgrade their code much easily and faster, with almost only
mechanical changes. It's not a panacea of course: you probably still
need minor manual adjustments and supervising, but it can still be of
great help.

#### Where?

PyQt3Support has been developed and tested under both Windows (2000, XP,
Vista) and Linux (Ubuntu, Fedora).

#### License

Qt3Support follows whatever license you have for PyQt3 and PyQt4,
because its source code is machine-generated from PyQt3's and PyQt4's
source code.

Thus, Qt3Support can be freely used under both the GPL or the commercial
license offered by Qt/PyQt producers.

In case you are interested in developing Qt3Support itself, you want to
know that the script that generates Qt3Support is released under the GPL
license.

#### Status

PyQt3Support is not complete: it binds about 30% of the Qt3Support, but
don't be fooled by this figure: it's the part that is probably used most
in existing programs (more common widgets, constructors, ecc.).

Moreover, since it is fully machine-generated, it is very easy to extend
it to cover more classes and functions. See below as per how to
contribute to the development.

* PyQt3 ported classes:
    Q3VBox, Q3HBox, Q3Frame, Q3Grid, Q3Accel, Q3PopupMenu, Q3MenuData,
    Q3DockWindow, Q3DockArea, Q3ListView, Q3ScrollView, Q3ColorGroup,
    Q3Header, Q3ListBox, Q3StrList, Q3Table, Q3MemArray, Q3MainWindow,
    Q3ToolBar, Q3Action, Q3SimpleRichText, Q3StyleSheet, Q3Mime,
    Q3ComboBox, Q3GroupBox, Q3FileDialog, Q3Url, Q3WidgetStack,
    Q3HGroupBox, Q3VGroupBox, Q3IconView, Q3DragObject, Q3Picture,
    Q3ValueList, Q3CString, Q3ButtonGroup, Q3VButtonGroup

* PyQt4 qt3supported classes:
    Gui.QBoxLayout, Core.QNamespace, Gui.QLCDNumber, Gui.QGridLayout,
    Gui.QApplication, Gui.QPushButton, OpenGL.QGLWidget, Core.QObject,
    Gui.QLabel, Gui.QPixmap, Core.QTextCodec, Gui.QToolButton,
    Gui.QTabWidget, Gui.QMenu, Core.QTimer, Gui.QLayout, Gui.QPalette,
    Gui.QMenuBar, Gui.QLineEdit, Gui.QDialog, Gui.QInputDialog,
    Gui.QCheckBox, Gui.QWidget, Gui.QTextEdit, Gui.QEvent, Gui.QSlider


#### Download

http://www.develer.com/oss/PyQt3Support


-- 
Matteo Bertini - naufraghi at develer.com
Develer S.r.l. - http://www.develer.com
Software Solutions






From srikrishnamohan at gmail.com  Mon Sep  3 06:39:05 2007
From: srikrishnamohan at gmail.com (km)
Date: Mon, 3 Sep 2007 16:09:05 +0530
Subject: metaclasses: timestamping instances
In-Reply-To: <1188665051.107414.61200@50g2000hsm.googlegroups.com>
References: <f4cc03640709010706x352f097wdfe9e7fc3612580b@mail.gmail.com>
	<mailman.277.1188662918.28954.python-list@python.org>
	<1188665051.107414.61200@50g2000hsm.googlegroups.com>
Message-ID: <f4cc03640709030339h7f1041a4p6e11239399a84755@mail.gmail.com>

Hi,

But why does it show  varied difference in the time  between a and b
instance creations when __metaclass__ hook is used and when not used in
class Y ? I dont understand that point !

KM
On 9/1/07, Michele Simionato <michele.simionato at gmail.com> wrote:
>
> On Sep 1, 6:07 pm, Steve Holden <st... at holdenweb.com> wrote:
> <snip>
> >
> > Debugging with Wing IDE and examining the classes at a breakpoint shows
> > this to be true (even after Y's __metaclass__ assignment is commented
> out):
> >
> >  >>> X.__metaclass__
> > <class '__main__.Meta'>
> >  >>> Y.__metaclass__
> > <class '__main__.Meta'>
> >  >>>
>
> For the benefit of the readers I will just point out that in order
> to determine the metaclass of a class it is far better NOT to relay on
> the
> __metaclass__ attribute. The right thing to to is to look at the
> __class__
> attribute, or to use type. Here is a (made up) example
> where .__metaclass__ gives
> the wrong result:
>
>
> In [9]: class M(type): pass
>    ...:
>
> In [10]: class B: __metaclass__ = M
>    ....:
>
> In [11]: B.__metaclass__ = None # now the hook is set to None, but the
> metaclass does not change
>
> In [12]: B.__class__
> Out[12]: <class '__main__.M'>
>
>        Michele Simionato
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
-------------- next part --------------
An HTML attachment was scrubbed...
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From rbonvall at gmail.com  Fri Sep  7 13:19:02 2007
From: rbonvall at gmail.com (Roberto Bonvallet)
Date: Fri, 07 Sep 2007 17:19:02 -0000
Subject: Speed of Python
In-Reply-To: <mailman.230.1189183406.2658.python-list@python.org>
References: <mailman.230.1189183406.2658.python-list@python.org>
Message-ID: <1189185542.798286.168880@50g2000hsm.googlegroups.com>

On Sep 7, 12:42 pm, "wang frank" <f... at hotmail.co.jp> wrote:
> Here is the bench1.py:
> import math
> def bench1(n):
>         for i in range(n):
>                 for j in range(1000):
>                         m=j+1
>                         z=math.log(m)
>                         z1=math.log(m+1)
>                         z2=math.log(m+2)
>                         z3=math.log(m+3)
>                         z4=math.log(m+4)
>                         z5=math.log(m+5)
>                         z6=math.log(m+6)
>                         z7=math.log(m+7)
>                         z8=math.log(m+8)
>                         z9=math.log(m+9)
>         return z9
>
> Is my conclusion correct that Python is slower than matlab?

Show us your Matlab code in order to see if both are equivalent.
Your Python code creates n lists of 1000 elements, so you're not
actually
measuring only the numeric computations.

Cheers,
--
Roberto Bonvallet



From mail at timgolden.me.uk  Thu Sep 13 11:52:41 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 13 Sep 2007 16:52:41 +0100
Subject: Coming from Perl
In-Reply-To: <iPcGi.357$372.115@read2.cgocable.net>
References: <Cv%Fi.198$372.59@read2.cgocable.net>	<1189644803.816375.269950@y42g2000hsy.googlegroups.com>	<b46Gi.221$372.100@read2.cgocable.net>	<87y7fa52ru.fsf@benfinney.id.au>	<jWaGi.224$372.55@read2.cgocable.net>	<mailman.485.1189691416.2658.python-list@python.org>	<d9cGi.356$372.131@read2.cgocable.net>	<mailman.489.1189695918.2658.python-list@python.org>
	<iPcGi.357$372.115@read2.cgocable.net>
Message-ID: <46E95CC9.2000103@timgolden.me.uk>

Amer Neely wrote:
> Richie Hindle wrote:
>>> [Amer]
>>> #!/usr/bin/python
>>> [...] On my home PC [...]
>>> [Thu Sep 13 04:16:03 2007] [error] [client 0.0.0.0] (OS 2)The system 
>>> cannot find the file specified.
>> That's because on your home PC Python is somewhere like
>> C:\Python25\python.exe, not /usr/bin/python.
>>
>> Are you sure /usr/bin/python is correct for your hosting environment?
>>
> 
> It's my understanding that the Windows shell doesn't pay much attention 
> to the shebang line if the file type is associated with the proper 
> application.
> 
> But I tried your suggestion and got the same results.

The Windows shell doesn't, but Apache does. (Haven't followed
this thread closely, but I seem to remember it has to do with
running CGI scripts).

TJG


From david at asdf.asdf  Tue Sep 11 21:54:51 2007
From: david at asdf.asdf (bambam)
Date: Wed, 12 Sep 2007 11:54:51 +1000
Subject: function to do dynamic import?
References: <13ecb84p1ghrd64@corp.supernews.com>
	<1189491152.601490.33880@o80g2000hse.googlegroups.com>
Message-ID: <13eehnapt0r0jc2@corp.supernews.com>


<attn.steven.kuo at gmail.com> wrote in message 
news:1189491152.601490.33880 at o80g2000hse.googlegroups.com...
> On Sep 10, 10:52 pm, "bambam" <da... at asdf.asdf> wrote:
>> import works in the main section of the module, but does
>> not work as I hoped when run inside a function.
>>
>> That is, the modules import correctly, but are not visible to
>> the enclosing (global) scope.
>>
>> Questions:
>> (1) Where can I read an explanation of this?
>> (2) Is there a work around?
>>
>> BTW, sys.modules("filename") shows that the module is
>> loaded, I just don't know how to use it when loaded that
>> way.  Also, if I import again at the global scope, the module
>> name becomes available.
>>
>> Steve.
>
>
>
> (snipped)
>
> This was recently discussed:
>
>    http://groups.google.com/group/comp.lang.python/msg/f6fcdf49710cb833
>
> --
> Hope this helps,
> Steven
>

def gim():
    exec "global gamel"
    exec "import gamel"

Unfortunately, does not have the desired effect.
Steve.




From jcd at sdf.lonestar.org  Thu Sep 20 23:04:49 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Thu, 20 Sep 2007 23:04:49 -0400
Subject: UTF-8 characters in doctest
In-Reply-To: <878x71jfwo.fsf@pobox.com>
References: <1190202459.229197.297350@n39g2000hsh.googlegroups.com>	<fcr3u9$l32$03$2@news.t-online.com>
	<878x71jfwo.fsf@pobox.com>
Message-ID: <46F334D1.20909@sdf.lonestar.org>

John J. Lee wrote:
> Peter Otten <__peter__ at web.de> writes:
> [...]
>   
>> def f(s):
>>     return (s,)
>>     
>
> Forgive me if this is a stupid question, but: What purpose does
> function f serve?
>
>
> John
>   

Well, it has nothing to do with the unicode bit that came before it.  It
just takes an argument, and wraps it in a 1-tuple.  Guessing by the
argument of "s", that argument is expected to be a string.

One use I can think of is that sometimes you'll find a function that
returns a string or a list or tuple of strings. If you want to pass that
result on to a for loop, and only loop once on the string (instead of
looping on each letter of the string), you might want to wrap it in a
tuple or a list before passing it to the loop.

Cheers,
Cliff




From ed at leafe.com  Wed Sep 12 08:39:01 2007
From: ed at leafe.com (Ed Leafe)
Date: Wed, 12 Sep 2007 08:39:01 -0400
Subject: Python Database Apps
In-Reply-To: <1189536987.259907.68650@e34g2000pro.googlegroups.com>
References: <1189479130.905136.196820@r34g2000hsd.googlegroups.com>
	<mailman.387.1189521302.2658.python-list@python.org>
	<1189536987.259907.68650@e34g2000pro.googlegroups.com>
Message-ID: <BFE22934-3F43-40C2-90F9-F69B9704F1BB@leafe.com>

On Sep 11, 2007, at 2:56 PM, darien.watkins at gmail.com wrote:

> It's gonna be a desktop app.  The
> database engine is going to be the critical component.  I like sqlite
> so that I don't need a database server on the client side.  It would
> help though if there is a way to sync between multiple clients to a
> central server database.  That's the tough part.  To give you a better
> idea of what i'm trying to do, I am trying to write an app where
> multiple technicians have an issue tracker that is available both
> offline and online.  I was looking to use sqlite as the local side
> that would sync new and updated issues to a central server when
> online.  Any technician may work on any issue.  Generally they will
> not be working on the same issue at the same time.  The technicians
> are geographically diverse (anywhere in the southeast US, not in an
> office.)

	As far as the server goes, you can't go wrong with PostgreSQL, as  
others have mentioned. I have more experience with MySQL, but their  
recent licensing changes have simply made it easier to go with  
Postgres, as I don't have to worry about which clause of which  
document I might be violating.

	For the local data store, SQLite is far and away the best choice,  
since you don't have to use two types of data access, as you would if  
you went with SQL on the server and, say, pickling on the local.

	If you create both data stores with the same structure, you can use  
UUIDs as your keys, along with a timestamp flag for records that are  
added or modified when disconnected so that you can re-sync later.  
You will have to handle conflicts (i.e., someone changed a record  
that another also changed while disconnected) on your own,  
implementing your own business logic to determine who "wins", and how  
the conflicted data is handled.

	I'll close with a plug for our product: Dabo. It is a desktop  
application framework with support for SQLite, PostgreSQL, MySQL,  
Firebird and Microsoft SQL Server databases. For disconnected data,  
you would simply define a local connection (to SQLite) and a remote  
connection (to your server database), and switch between the two  
depending on whether you are disconnected or not. The framework will  
handle the rest, allowing you to focus on the stuff that is unique to  
your app, such as the conflict resolution and business logic.

-- Ed Leafe
-- http://leafe.com
-- http://dabodev.com




From cyberco at gmail.com  Wed Sep 26 16:27:18 2007
From: cyberco at gmail.com (cyberco)
Date: Wed, 26 Sep 2007 20:27:18 -0000
Subject: PyS60
In-Reply-To: <1190731662.584011.105500@o80g2000hse.googlegroups.com>
References: <1190731662.584011.105500@o80g2000hse.googlegroups.com>
Message-ID: <1190838438.101681.60090@d55g2000hsg.googlegroups.com>

I have used PyS60 quite a lot a while ago, but what is it you exactly
wanted to know?
One thing I can tell you is that it's a pity that it only runs on
Series 60 phones and that the security restrictions of third edition
devices severely limited the options for developers.

2B



From sulsa at gazeta.pl  Mon Sep  3 20:49:08 2007
From: sulsa at gazeta.pl (Sulsa)
Date: Tue, 4 Sep 2007 02:49:08 +0200
Subject: Python is overtaking Perl
References: <1188865943.238573.218750@w3g2000hsg.googlegroups.com>
Message-ID: <20070904024908.b8aca60c.sulsa@gazeta.pl>

On Tue, 04 Sep 2007 00:32:23 -0000
Ben <benyang22 at gmail.com> wrote:

> Here are the statistics from Google Trends:
> 
> http://benyang22a.blogspot.com/2007/09/perl-vs-python.html
> 

This chart is showing that amount of python programers is smaller every
year :(


From namesagame-usenet at yahoo.com  Sat Sep 29 15:53:17 2007
From: namesagame-usenet at yahoo.com (gamename)
Date: Sat, 29 Sep 2007 12:53:17 -0700
Subject: C Source Code Generator For Test Cases
In-Reply-To: <5m69hrFbre38U1@mid.uni-berlin.de>
References: <1191001738.456766.176050@n39g2000hsh.googlegroups.com>
	<5m51iuFbao07U1@mid.uni-berlin.de>
	<1191009469.736521.39210@k79g2000hse.googlegroups.com>
	<5m69hrFbre38U1@mid.uni-berlin.de>
Message-ID: <1191095597.287680.298400@50g2000hsm.googlegroups.com>


> Instead of reading the testcase tables and generating source for test
> routines you simply can do the tests right away.
>

Can't. :(  This is for an embedded system.  I need to create source
(in C) on one machine and then compile on others.  The only thing that
I can be certain of is an ANSI compiler on any machine I use.

-T



From bignose+hates-spam at benfinney.id.au  Thu Sep 20 23:39:13 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 21 Sep 2007 13:39:13 +1000
Subject: An Editor that Skips to the End of a Def
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk>
	<tfAIi.51111$Um6.44314@newssvr12.news.prodigy.net>
	<YPGIi.54591$YL5.26012@newssvr29.news.prodigy.net>
Message-ID: <874phou1pa.fsf@benfinney.id.au>

"W. Watson" <wolf_tracks at invalid.com> writes:

> Is vim just an editor or is it capable of running and debugging a
> program, as well?

(Please don't top-post. Instead, reply below each point to which
you're responding, removing quoted text irrelevant to your response.)

Both Emacs and Vim are highly customisable text editors. They are
configurable with complete programming languages specific to the
program, and both have a huge community of programmers writing useful
extensions.

So, neither of them is "just an editor"; they are editors at their
core, that can become complete programming environments by taking
already-written components for them. Your operating system
distribution of either Vim or Emacs will already include many of these
components when you install the package, and many more are available.

-- 
 \        "The restriction of knowledge to an elite group destroys the |
  `\                   spirit of society and leads to its intellectual |
_o__)                                impoverishment." ?Albert Einstein |
Ben Finney


From namesagame-usenet at yahoo.com  Thu Sep 13 12:23:55 2007
From: namesagame-usenet at yahoo.com (gamename)
Date: Thu, 13 Sep 2007 09:23:55 -0700
Subject: Python+Expect+Win32 = Not Possible?
In-Reply-To: <mailman.483.1189690866.2658.python-list@python.org>
References: <1189657637.539038.317280@k79g2000hse.googlegroups.com>
	<1189672955.321701.164050@57g2000hsv.googlegroups.com>
	<1189681397.349994.126130@57g2000hsv.googlegroups.com>
	<mailman.483.1189690866.2658.python-list@python.org>
Message-ID: <1189700635.617281.190250@k79g2000hse.googlegroups.com>

On Sep 13, 4:18 am, Tim Golden <m... at timgolden.me.uk> wrote:
> gamename wrote:
> > On Sep 13, 1:42 am, half.ital... at gmail.com wrote:
> >> On Sep 12, 9:27 pm, gamename <namesagame-use... at yahoo.com> wrote:
>
> >>> Hi,
> >>> Is it still the case there is no practical Expect-like module for
> >>> win32? I know that cygwin can support pexpect, but that isn't an
> >>> option here --- I have to use a native win32 Python version.
> >>> Are there alternatives, or is it simply not an option to replicate
> >>> Expect on win32 with python?
> >>> All I'm trying to do is start a couple processes, wait for each to say
> >>> "done" on stdout and then quit (or timeout if something went wrong).
> >>> TIA,
> >>> -T
> >> I had planned on using telnet to do the same thing on windows.  I
> >> don't think I ever proved it, but I'm pretty sure it will work.
>
> > Thanks, Sean.  The problem is that telnet is generally disabled on
> > most hosts nowadays.
>
> I'm not sure whether the need you describe above "start a
> couple [of] processes, wait for each to say 'done' and
> then quit (or timeout...)" is *all* of your requirements
> or just an example. And are these processes running on
> remote machines? Or just locally?
>
Good question.  That's part of the requirements.  The rest are:  The
processes need to be async (i.e. the script doesn't stop while waiting
for the process to complete). They also need some kind of timeout
mechanism so that the processes don't run forever. All processes are
local.

> Depending on those things, maybe there are other ways
> to do what you want under Windows?
>
> (I've checked back through the archives and I can't find
> any earlier posts describing the requirement more clearly).
>
> TJG




From ldo at geek-central.gen.new_zealand  Fri Sep 14 02:44:21 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Fri, 14 Sep 2007 18:44:21 +1200
Subject: "once" assigment in Python
References: <1189750616.597409.85380@w3g2000hsg.googlegroups.com>
Message-ID: <fcdak5$o9t$1@lust.ihug.co.nz>

In message <1189750616.597409.85380 at w3g2000hsg.googlegroups.com>, Lorenzo Di
Gregorio wrote:

> During coding I find it handy to assign a variable *unless it has been
> already assigned*: I've found that this is often referred to as "once"
> assigment.

Why not just assign to it once at the beginning and be done with it?


From fakeaddress at nowhere.org  Sat Sep 22 16:30:05 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Sat, 22 Sep 2007 20:30:05 GMT
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <7xy7eysfc0.fsf@ruckus.brouhaha.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<XIbJi.36$ua4.28@newssvr22.news.prodigy.net>
	<7xy7eysfc0.fsf@ruckus.brouhaha.com>
Message-ID: <hXeJi.7647$FO2.4554@newssvr14.news.prodigy.net>

Paul Rubin wrote:
> Bryan Olson <fakeaddress at nowhere.org> writes:
>> chris.monsanto at gmail.com wrote:
>>> There are already anonymous functions in Python.
>>> lambda x, y, z: x + y + z
>>> is the same as:
>>> def _(x, y, z): return x + y + z
>> They are the same only in special cases:
>>      The special identifier "_" is used in the interactive
>>      interpreter to store the result of the last evaluation...
> 
> I'm not sure what Chris was really getting at, 

I was big-time unsure. At first, I thought Chris's latter
form to be equivalent to a pass statement. I've long used
the Python convention of assigning throw-away values to '_',
and I was under the mistaken impression Python defined _
as a discard target.

When I looked it up, I was surprised to find that my
understanding of the _ variable was wrong, and shocked that
there really is an interesting context where Chris's claim
has a strong case.


> since among other
> things lambda:... is an expression while def... is a statement.

True fact, but note that one form of statement is an expression.

> But Python certainly has anonymous functions without lambda:
> 
>    def compose(f,g):
>      def h(*a, **k):
>        return f(g(*a, **k))
>      return h
> 
>    x = compose(math.sin, math.cos)(1.0)
> computes sin(cos(1.0)) where a function equivalent to 
>   lambda x: sin(cos(x))
> is constructed and used without being bound to a symbol.

How anonymous is that function when we can see that its name is 'h'?

     import math

     f = compose(math.sin, math.cos)
     print f.__name__

Am I making a bogus argument? Kind of. Most authors of "anonymous"
works do in fact have real names. The term really means that they
entered the context at issue dissociated from their given name.
Nevertheless, def is never a real anonymous function constructor.

If our concern is Python's suitability for studying principles of
programming, I think I'm on stronger ground. Python is great for
getting things done. It is easy to learn in the sense of learning
to to use if for practical tasks. Python's actual semantics are not
as neat and clean as some other languages.


-- 
--Bryan


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun Sep  9 06:04:52 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 09 Sep 2007 12:04:52 +0200
Subject: Python syntax wart
References: <fbvvil$7dj$1@lust.ihug.co.nz>
Message-ID: <5khuq4F3ij9eU1@mid.individual.net>

Lawrence D'Oliveiro wrote:

> Not possible:
> 
>     for \
>         Link \
>     in \
>         GetEachRecord \
>           (
>             "links",
>             ("from_episode",),
>             "to_episode = %s",
>             [EpisodeID],
>             "order by when_created"
>           ) \
>     :
>         out.write \
>           (
>                 "<P><A HREF=\"%s\">Back to episode %d</A>\n"
>             %
>                 (
>                     LinkToMe({"ep" : Link["from_episode"]}),
>                     Link["from_episode"]
>                 )
>           )
>     #end for

IMHO, that's no Python syntax wart, but a coding style wart.

What's wrong with this:

for Link in GetEachRecord(
        "links",
        ("from_episode",),
        "to_episode = %s",
        [EpisodeID],
        "order by when_created"
         ):
    out.write("<P><A HREF=\"%s\">Back to episode %d</A>\n" % (
                LinkToMe({"ep" : Link["from_episode"]}),
                Link["from_episode"]
                )
            )

It's still quite crammed; I think I'd write it more explicit.

(Personally, I've never needed the possibility to tear a "for" apart
so it covers more than ten lines, or to waste lines by placing
single parentheses or colons in them -- my screen really isn't
unlimited in size.)

Regards,


Bj?rn


-- 
BOFH excuse #247:

Due to Federal Budget problems we have been forced to cut back on
the number of users able to access the system at one time. (namely
none allowed....)



From gagsl-py2 at yahoo.com.ar  Tue Sep 18 09:19:38 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 18 Sep 2007 10:19:38 -0300
Subject: string replace shortcut
References: <1190115872.824161.115420@w3g2000hsg.googlegroups.com>
Message-ID: <op.tyupy0jwx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Tue, 18 Sep 2007 08:44:32 -0300, <vedrandekovic at v-programs.com>  
escribi?:

> Hello,
>
> I am trying to replace some string with list objects:
>
>>>> my_text1="function1 function2"
>>>> from my_module_with_functions_1 import *
>>>> from my_module_with_functions_2 import *
>
> # functions in module " my_module_with_functions_1 ":
> my_func1  it's value "function1"
> my_func2  it's value "function2"
>
> # functions in module " my_module_with_functions_2 ":
> my_func100  it's value "bla bla 1"
> my_func200  it's value "bla bla 2"
>
> ........now, we need find and replace functions from module "
> my_module_with_functions_1 "  and
> replace them with  functions from module " my_module_with_functions_2
> "
>
> with: my_text1.replace(items1,items2)
>
> Result must be:
>
>>>> print my_text1.replace(items1,items2)
> bla bla 1 bla bla 2

I'm unsure what you want. You keep saying "functions" but they are  
apparently strings.
If your problem is how to replace many strings, just do it one at a time  
(asuuming they're unique so the order is not important).

def multi_replace(text, list1, list2):
     for rep1, rep2 in itertools.izip(list1, list2):
         text = text.replace(rep1, rep2)
     return text

py> multi_replace("a sentence with a few words", ["sentence","words"],  
["man","d
ollars"])
'a man with a few dollars'

Now, your problem may be building both lists. They must be syncronized,  
that is, the first element on one list must correspond to the first  
element on the other, and so on. The import statement doesn't guarantee  
any ordering so I think the best way would be to define an __all__  
attribute on both modules, and import that:

 from my_module_with_functions_1 import __all__ as list_of_names_1
 from my_module_with_functions_2 import __all__ as list_of_names_2

new_text = multi_replace(my_text1, list_of_names_1, list_of_names_2)

-- 
Gabriel Genellina



From aleax at mac.com  Sun Sep 30 20:40:27 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 30 Sep 2007 17:40:27 -0700
Subject: Can you please give me some advice?
References: <mailman.1300.1191147737.2658.python-list@python.org>
Message-ID: <1i59kx9.1rytrz2xyu2w9N%aleax@mac.com>

Byung-Hee HWANG <bh at izb.knu.ac.kr> wrote:

> Hi there,
> 
> What is different between Ruby and Python?

Not all that much; Python is more mature, Ruby more fashionable.

 I am wondering what language
> is really mine for work. Somebody tell me Ruby is clean or Python is
> really easy! Anyway I will really make decision today what I have to
> study from now on. What I make the decision is more difficult than to
> know why I have to learn English. Yeah I do not like to learn English
> because it is just very painful..

www.python.or.kr/
http://wiki.python.org/moin/KoreanPythonBooks


Alex


From gagsl-py2 at yahoo.com.ar  Tue Sep  4 15:26:53 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 04 Sep 2007 16:26:53 -0300
Subject: Setting Current Dir in Python
References: <000001c7eeec$d9341470$8b9c3d50$@net>
Message-ID: <op.tx49m3vxx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 04 Sep 2007 09:12:22 -0300, Sandipan Gangopadhyay  
<sandipan at earthlink.net> escribi?:

> I have recently installed Python 2.5.1 and Pythonwin (without any  
> errors) on
> Windows Vista Ultimate.
>
> Now, the programs run fine within Pythonwin IDE when current directory is
> set to the program's directory.
>
> But, when I double click them from Windows Explorer, the program is not  
> run.

First, fix your source code (either removing the non-ascii character or  
adding an encoding line at the top, see  
<http://www.python.org/peps/pep-0263.html>) (PEP0263 is enforced from  
Python 2.5 and up; you got a warning on earlier versions).

os.getcwd() returns the current directory.
os.chdir() changes the current directory.
A shortcut on the desktop may use the desktop itself as the initial  
directory.
If you want to run your script from within the same directory as it  
resides, try this:
os.chdir(os.path.dirname(__file__))


-- 
Gabriel Genellina



From mcl.office at googlemail.com  Fri Sep  7 07:08:52 2007
From: mcl.office at googlemail.com (mcl)
Date: Fri, 07 Sep 2007 04:08:52 -0700
Subject: MySQLdb: ValueError Something Stupid
Message-ID: <1189163332.990248.134080@d55g2000hsg.googlegroups.com>

I have just started with python and MySQL.

I have a simple test for each of my tables.

The first two work as expected, but the third 'qlooks', gives a
ValueError.

If I copy and paste the SQL in the traceback to phpMyAdmin, it works
as expected.

Can anyone give a clue as to what I am doing wrong

Python 2.4
MySQL  4.1.22-standard

The tablename qlooks is LOWERCASE

Code =======================================================
	cursor = gv.conn.cursor()
	queries = ["%septi%"]
	fields = ("qlTitle", "qlSubTitle", "qlPostCode", "qlMap",
"qlDetails")
	tblFields = "select * from qlooks "
	whereTests = 'Where qlTitle like "%septi%"'
	sql = tblFields + whereTests
	#cursor.execute(sql)
	cursor.execute('select * from PERMS')
	row = cursor.fetchone()
	print "Row=", row, gv.nl
	cursor.execute('select * from LISTS')
	row = cursor.fetchone()
	print "Row=", row, gv.nl
	cursor.execute('select * from qlooks')
	row = cursor.fetchone()
	print "Row=", row, gv.nl

	cursor.close()

ERROR TRACEBACK ++++++++++++++++++++++++++++++++++++++++

   79         print "Row=", row, gv.nl
   80         cursor.execute('select * from qlooks')
   81         row = cursor.fetchone()
   82         print "Row=", row, gv.nl
cursor = <MySQLdb.cursors.Cursor instance>, cursor.execute = <bound
method Cursor.execute of <MySQLdb.cursors.Cursor instance>>
 /usr/lib/python2.4/site-packages/MySQLdb/cursors.py in
execute(self=<MySQLdb.cursors.Cursor instance>, query='select * from
qlooks', args=None)
   93         """
   94         del self.messages[:]
   95         return self._execute(query, args)
   96
   97     def _execute(self, query, args):
self = <MySQLdb.cursors.Cursor instance>, self._execute = <bound
method Cursor._execute of <MySQLdb.cursors.Cursor instance>>, query =
'select * from qlooks', args = None
 /usr/lib/python2.4/site-packages/MySQLdb/cursors.py in
_execute(self=<MySQLdb.cursors.Cursor instance>, query='select * from
qlooks', args=None)
  112             exc, value, tb = exc_info()
  113             del tb
  114             self.errorhandler(self, exc, value)
  115         self._executed = query
  116         return r
self = <MySQLdb.cursors.Cursor instance>, self.errorhandler = <bound
method Connection.defaulterrorhandler of ...l.connection open to
'db.sabren.com' at 936cac4>>, exc = <class exceptions.ValueError>,
value = <exceptions.ValueError instance>
 /usr/lib/python2.4/site-packages/MySQLdb/connections.py in
defaulterrorhandler(connection=<_mysql.connection open to
'db.sabren.com' at 936cac4>, cursor=<MySQLdb.cursors.Cursor instance>,
errorclass=<class exceptions.ValueError>,
errorvalue=<exceptions.ValueError instance>)
   31     else:
   32         connection.messages.append(error)
   33     raise errorclass, errorvalue
   34
   35
errorclass = <class exceptions.ValueError>, errorvalue =
<exceptions.ValueError instance>

ValueError: invalid literal for int(): 0-
      args = ('invalid literal for int(): 0-',)


=========================================
Thanks Richard



From jwrweatherley at gmail.com  Sun Sep  2 07:51:42 2007
From: jwrweatherley at gmail.com (jwrweatherley at gmail.com)
Date: Sun, 02 Sep 2007 04:51:42 -0700
Subject: Why is this loop heavy code so slow in Python? Possible Project Euler
	spoilers
Message-ID: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>

I'm pretty new to python, but am very happy with it. As well as using
it at work I've been using it to solve various puzzles on the Project
Euler site - http://projecteuler.net. So far it has not let me down,
but it has proved surprisingly slow on one puzzle.

The puzzle is: p is the perimeter of a right angle triangle with
integral length sides, {a,b,c}. which value of p  < 1000, is the
number of solutions {a,b,c} maximised?

Here's my python code:

#!/usr/local/bin/python

solutions = [0] * 1001
p = 0

for a in xrange(1, 1000):
    for b in xrange(1, 1000 - a):
        for c in xrange(1, 1000 - a - b):
            p = a + b + c
            if p < 1000:
                if a ** 2 + b ** 2 == c ** 2:
                    solutions[p] += 1

max = 0
maxIndex = 0
index = 0
for solution in solutions:
    if solution > max:
        max = solution
        maxIndex = index
    index += 1

print maxIndex


It takes 2 minutes and twelve seconds on a 2.4GHz Core2Duo MacBook
Pro. Surprised at how slow it was I implemented the same algorithm in
C:

#include <stdio.h>
#include <stdlib.h>

int main() {
  int* solutions = calloc(1000, sizeof(int));

  int p;
  for(int a = 1; a < 1000; ++a) {
    for(int b = 1; b < 1000 - a; ++b) {
      for(int c = 1; c < 1000 - a - b; ++c) {
	p = a + b + c;
	if(p < 1000) {
	  if(a * a + b * b == c * c) {
	    solutions[p] += 1;
          }
        }
      }
    }
  }

  int max = 0;
  int maxIndex = 0;

  for(int i = 0; i < 1000; ++i) {
    if(solutions[i] > max) {
      max = solutions[i];
      maxIndex = i;
    }
  }
  printf("%d\n", maxIndex);
  return 0;
}


gcc -o 39 -std=c99 -O3 39.c

The resulting executable takes 0.24 seconds to run. I'm not expecting
a scripting language to run faster than native code, but I was
surprised at how much slower it was in this case. Any ideas as to what
is causing python so much trouble in the above code?



From duncan.booth at invalid.invalid  Mon Sep 10 07:23:04 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 10 Sep 2007 11:23:04 GMT
Subject: Enum class with ToString functionality
References: <1189416537.050002.61120@r34g2000hsd.googlegroups.com>
Message-ID: <Xns99A77DF1BB5Bduncanbooth@127.0.0.1>

bg_ie at yahoo.com wrote:

> But it would be much nicer if I had a function to covert to string as
> part of the TestOutcomes class. How would I implement this?

Perhaps: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/413486


From jjl at pobox.com  Sat Sep 22 03:21:31 2007
From: jjl at pobox.com (John J. Lee)
Date: Sat, 22 Sep 2007 07:21:31 GMT
Subject: An Editor that Skips to the End of a Def
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87odfxjgjy.fsf@pobox.com> <m0BIi.16$Dy4.1@fe099.usenetserver.com>
Message-ID: <87sl574138.fsf@pobox.com>

Gary Coulbourne <bear at bears.org> writes:

> John J. Lee wrote:
>> Eclipse must be able to do this.
>
> Not by default... but I am certain there are plugins that provide python
> integration.  (And jython integration)

Well yes, obviously (?) I meant Eclipse with pydev installed.


John


From bignose+hates-spam at benfinney.id.au  Mon Sep 10 23:02:06 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 11 Sep 2007 13:02:06 +1000
Subject: Enum class with ToString functionality
References: <1189416537.050002.61120@r34g2000hsd.googlegroups.com>
	<87bqca9hrw.fsf@benfinney.id.au>
	<1189472591.797327.189180@w3g2000hsg.googlegroups.com>
	<87sl5m7xxm.fsf@benfinney.id.au>
	<1189478288.237609.25140@50g2000hsm.googlegroups.com>
Message-ID: <87odg99a6p.fsf@benfinney.id.au>

TheFlyingDutchman <zzbbaadd at aol.com> writes:

> On Sep 10, 7:12 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
> > TheFlyingDutchman <zzbba... at aol.com> writes:
> > > Looking at the documentation it looks excellent. But I don't
> > > understand the 0.4.2 version number,
> >
> > Note the tag that says the "Development Status" is "Beta".
> 
> What is the difference between this version and the 1.0 version?

I don't know yet, since my time machine is currently in for repairs.

-- 
 \      "If you ever reach total enlightenment while you're drinking a |
  `\   beer, I bet it makes beer shoot out your nose."  -- Jack Handey |
_o__)                                                                  |
Ben Finney


From max at alcyone.com  Sat Sep  1 23:53:33 2007
From: max at alcyone.com (Erik Max Francis)
Date: Sat, 01 Sep 2007 20:53:33 -0700
Subject: How best to dynamically define methods (and functions)?
In-Reply-To: <KY-dnfnpZM-0rkfbnZ2dnUVZ_t6onZ2d@speakeasy.net>
References: <mailman.288.1188704597.28954.python-list@python.org>
	<KY-dnfnpZM-0rkfbnZ2dnUVZ_t6onZ2d@speakeasy.net>
Message-ID: <KY-dnfjpZM8grkfbnZ2dnUVZ_t7inZ2d@speakeasy.net>

Erik Max Francis wrote:

> Something like::
> 
>     method = ['fun', ...]
>     for method in methods:
>         setattr(MyClass, method, lambda *x: Node(method, *x))

Err, that first line was supposed to be methods = ...

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   I like young girls. Their stories are shorter.
    -- Thomas McGuane


From jd at nospam.com  Fri Sep 21 14:53:34 2007
From: jd at nospam.com (Jd)
Date: Fri, 21 Sep 2007 11:53:34 -0700
Subject: xml-rpc timeout
In-Reply-To: <mailman.877.1190396335.2658.python-list@python.org>
References: <2_WdnTQ86eZNY27bnZ2dnUVZ_jCdnZ2d@comcast.com>
	<mailman.877.1190396335.2658.python-list@python.org>
Message-ID: <QYKdnX_tXu5Vj2nbnZ2dnUVZ_qWdnZ2d@comcast.com>

Steve Holden wrote:
> Jd wrote:
>> Hi
>>    I have a multi-threaded application. For certain operations to the
>> server, I would like to explicitly set timeout so that I get correct
>> status from the call and not timed out exception.
>>    Does anyone know how to go about doing it ?
>>
> The easiest way is to use socket.setdefaulttimeout() to establish a
> longer timeout period for all sockets, I guess. It's difficult to
> establish different timeouts for individual sockets when they aren't
> opened directly by your own code (though each socket does also have a
> method to set its timeout period).
> 
> regards
>  Steve

Ya.. the problem here is that I donot have acces to the socket. I have
written my own transport etc.. but when the socket is getting created,
there is no context for the method and where I know what method I am
going to call, I do not have access to socket.

I would have thought this to be an easy thing to achieve. In order to
make xml-rpc easy to use.. it has become difficult to control.

Anyone have any other ideas ?

/Jd


From blackmh at gmail.com  Wed Sep 12 12:34:44 2007
From: blackmh at gmail.com (Kveldulv)
Date: Wed, 12 Sep 2007 09:34:44 -0700
Subject: PyGTK right-click menu
Message-ID: <1189614884.175694.50420@y42g2000hsy.googlegroups.com>

HI all,

can someone show me how to make simple right-click menu in PyGTK.

tia



From alexandre.badez at gmail.com  Thu Sep 27 09:17:58 2007
From: alexandre.badez at gmail.com (Alexandre Badez)
Date: Thu, 27 Sep 2007 13:17:58 -0000
Subject: Launching command on windows
Message-ID: <1190899078.141370.116190@57g2000hsv.googlegroups.com>

Hy,

I'm working on windows and I try to do something like:

import os
APP = os.path.abspath("C:\\Program Files\\Notepad++\\notepad++.exe")
FILE1 = os.path.abspath("D:\\Documents and settings\\test1.py")
FILE2 = os.path.abspath("D:\\Documents and settings\\test2.py")
command = '"%(app)s" "%(file1)s" "%(file2)s"' % {
    'app' : APP,
    'file1' : FILE1,
    'file2' : FILE2}
# === FOR 'DEBUG' ===
print APP
print FILE1
print FILE2
print command
print repr(command)
# === END FOR 'DEBUG' ===
os.system(command)


This code give in output:
C:\Program Files\Notepad++\notepad++.exe
D:\Documents and settings\test1.py
D:\Documents and settings\test2.py
"C:\Program Files\Notepad++\notepad++.exe" "D:\Documents and settings
\test1.py" "D:\Documents and settings\test2.py"
'"C:\\Program Files\\Notepad++\\notepad++.exe" "D:\\Documents and
settings\\test1.py" "D:\\Documents and settings\\test2.py"'

'C:\Program' n'est pas reconnu en tant que commande interne
ou externe, un programme ex,cutable ou un fichier de commandes.
# <= My windows is a french one
# This error message could be translated as:
# 'c:\Program' is not an internal nor external command, an executable
program nor a command file

But if I copy the command in the output, an paste it in a console, it
work very well.
Does any of you know what I can do ?

PS: I think I'm oblige to add " neer every path for spaces in path,
but if you know an other way, it could be cool :)



From deets at nospam.web.de  Wed Sep 12 06:34:59 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 12 Sep 2007 12:34:59 +0200
Subject: newbie: self.member syntax seems /really/ annoying
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
Message-ID: <5kptmjF50dtfU1@mid.uni-berlin.de>

> 
>     with self:
>       .a_dot = -.k(.a-.u)
> 
> It's premature to make language suggestions as I am new to the
> language, but I would have though that making a 'with self' explicit
> in all methods would have been neat, so I could just write
>       .a_dot = -.k(.a-.u)
> which would still avoid confusion with local function variables, since
> '.a' is different from 'a'.
> 
> Please help if I am missing something -- this looks like a great
> language but I am going to mad trying to read numerical code full of
> 'self.'s breaking up the equations.

This is a FAQ - and the short answer is: no, you don't miss anything, and
it's not going change. If you want, you can shorten the expressions like
this:

s = self
s.a * s.b

Or choose any other valid name, e.g. the underscore.

Another (yet rather ugly) alternative would be to push the names into the
global namespace. But that could of course create major mayhem! So take
this with a huge grain of salt:

globals().update(self.__dict__)

a * b

Diez


From mydomdom at gmail.com  Fri Sep 14 08:21:43 2007
From: mydomdom at gmail.com (Dominique)
Date: Fri, 14 Sep 2007 12:21:43 +0000 (UTC)
Subject: Install Mac OS X - Idle doesn't show up
Message-ID: <loom.20070914T141438-201@post.gmane.org>

Hello,

Sorry bothering you with such a trivial problem.

I installed python on a new mac at office.
It seems everything is fine: in the console, I access to python.
But I just can't start Idle. It seems to open but closes immediately (it appears
in the dock and closes immediately).
It is also impossible to open any .py file.

I am sure some of you have a good idea of what to do (path,...).

Thanks in advance
Dominique



From jstroud at mbi.ucla.edu  Sat Sep 15 05:45:10 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sat, 15 Sep 2007 02:45:10 -0700
Subject: How to avoid overflow errors
In-Reply-To: <13emslk6n80mmf6@corp.supernews.com>
References: <13em8vnr527rq20@corp.supernews.com>	<fcfbj0$br$1@daisy.noc.ucla.edu>
	<13emslk6n80mmf6@corp.supernews.com>
Message-ID: <WKNGi.4471$7P7.3085@newssvr19.news.prodigy.net>

Steven D'Aprano wrote:
> On Fri, 14 Sep 2007 18:19:45 -0700, James Stroud wrote:
> 
>>> How do I subclass int and/or long so that my class also auto-converts
>>> only when needed?
>>>
>> Use __new__.
> 
> The disadvantage of that is that your example code requires me to 
> duplicate my methods in the long version and the int version. It's easy 
> enough to work around that (class factory function) but it just seems all 
> rather untidy...


The __new__ method is where you implement such decisions. There is no 
"tidier" way for one class "auto-convert" to another class, which is 
what you asked for (it says so right up there ^). So, if you don't like 
the answer, don't ask the question.

Despite its unseemly appearance because of all the underscores, it is 
the natural way in python (to do what you have asked and not something 
which you didn't ask).

The way to avoid duplicating methods (which is what you are asking for, 
no?) while still allowing your classes to maintain their identities is 
by using mixins:


class MyModulatingMixin(object):
   def modulate(self, sum):
     if self.modulus is None:
       return self.__class__(sum)
     else:
       return self.__class__(sum % self.modulus)
   def __add__(self, other):
     sum = long.__add__(long(self), long(other))
     return self.modulate(sum)
   def __mul__(self, other):
     sum = long.__mul__(long(self), long(other))
     return self.modulate(sum)

class MyLong(long):
   def __new__(cls, v, m=None):
     obj = long.__new__(cls, v)
     obj.modulus = m
     return obj

class MyInt(int):
   def __new__(cls, v, m=None):
     try:
       obj = int.__new__(cls, v)
       obj.modulus = m
     except OverflowError:
       obj = MyLong(v, m)
     return obj

for cls in MyLong, MyInt:
   cls.__bases__ = (MyModulatingMixin,) + cls.__bases__


py> i = MyInt(51)
py> j = MyInt(40, 7)
py> k = MyLong(2, 13)
py> i + j
91
py> j + k
0
py> k + j
3L
py> i * k
102
py> type(i * k)
<class '__main__.MyInt'>
py> k * i
11L
py> type(k * i)
<class '__main__.MyLong'>


James


From json.barnes at gmail.com  Wed Sep 26 12:38:35 2007
From: json.barnes at gmail.com (Jason M Barnes)
Date: Wed, 26 Sep 2007 09:38:35 -0700
Subject: An Editor that Skips to the End of a Def
In-Reply-To: <slrnffkodo.218.horpner@FIAD06.norwich.edu>
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<fd0au1$fro$1@lust.ihug.co.nz> <5lhs4pF8bkunU1@mid.individual.net>
	<fd4168$ige$1@lust.ihug.co.nz>
	<slrnfff9op.1is.horpner@FIAD06.norwich.edu>
	<fd9ncb$q3l$1@lust.ihug.co.nz>
	<slrnffhe9g.2db.hat@se-162.se.wtb.tue.nl>
	<fdcfci$brq$1@lust.ihug.co.nz>
	<mailman.1078.1190777151.2658.python-list@python.org>
	<slrnffkodo.218.horpner@FIAD06.norwich.edu>
Message-ID: <833263a00709260938y5c7bed1cmecd97dcfc111c7e9@mail.gmail.com>

On 9/26/07, Neil Cerutti <horpner at yahoo.com> wrote:
> On 2007-09-26, Jason M Barnes <json.barnes at gmail.com> wrote:
> > Off the top of my head, I can think of a few vim commands that
> > have come in handy.  I can search through a webpage in Firefox
> > by using the same '/' search command that vim has.  The
> > movement keys (h,j,k,l) are the same as in any paging program
> > I've ever used.  Not to mention that I learned regexes by
> > learning 's/regex/replacement' first :-)
>
> Yup. A huge advantge of learning vi is how much it helps improve
> your nethack experience. ;) Ignorance was Emacs was an obstacle I
> had to overcome in order to get into the Lisp world, though.

Ha!  I'm trying to learn Lisp now, too, and I'm having to learn Emacs
to be more efficient.  I feel like I'm taking my first CS class again.
(Now was that C-x C-c or M-c M-x?... Nope, that didn't work... ;-)
>
> > That's my religion anyway ;-), but I thought this was a python
> > mailing list ;-)
>
> Vim has Python integration if you want to control it with Python
> scripts. Cool! Of course, Vim needs such a capability more than
> Emacs, which has the very cool elisp scripting language. I'm not
> so keen on Vim's built-in scripting language.
>
> --
> Neil Cerutti
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From gagsl-py2 at yahoo.com.ar  Sat Sep 29 17:19:14 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 29 Sep 2007 18:19:14 -0300
Subject: Command-line does work when scheduled
References: <1191098074.342460.52130@n39g2000hsh.googlegroups.com>
Message-ID: <op.tzfpicunx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 29 Sep 2007 17:34:34 -0300, Jim <jscrerar at compuserve.com> escribi?:

> I want to schedule a Python program that reads the command line for
> input.  However, when adding an argument to the command line Python
> will not pick it up when using Windows scheduled tasks.
>
> How do I get it to work?

Do you write the command line when defining the task? Using double quotes  
around arguments with spaces?
It works fine for me.

-- 
Gabriel Genellina



From paul.hankin at gmail.com  Mon Sep 24 18:03:05 2007
From: paul.hankin at gmail.com (Paul Hankin)
Date: Mon, 24 Sep 2007 22:03:05 -0000
Subject: Nested For and While Statements
In-Reply-To: <1190667172.491315.209110@y42g2000hsy.googlegroups.com>
References: <1190662087.403000.16290@g4g2000hsf.googlegroups.com>
	<1190666647.199890.174670@o80g2000hse.googlegroups.com>
	<1190667172.491315.209110@y42g2000hsy.googlegroups.com>
Message-ID: <1190671385.064498.206920@y42g2000hsy.googlegroups.com>

First the bugs...

On Sep 24, 9:52 pm, kou... at hotmail.com wrote:
> ...
>     avcsasdoc = workspace + "\avcsas.txt"
> ...

There's quite a few cases like this where you don't escape
backslashes, so your filenames are mostly mangled. Here \a produces
character code 7, which is definitely wrong.

Either escape them like this: '\\avcsas.txt' or use raw strings where
backslashes aren't treated specially: r'\avcsas.txt'. You might want
to look at the 'os.path' module for help in constructing filenames.

You have a 'break' and the end of the last for loop. This has the
effect of stopping the for loop at the first iteration. Either it's a
bug, or you really didn't want a for loop!


There's also quite a few places where your code could be improved:

>         classsum = avcclass[0] + avcclass[1] + avcclass[2] +
> avcclass[3] + avcclass[4] + avcclass[5] \
>        + avcclass[6] + avcclass[7] + avcclass[8] + avcclass[9] +
> avcclass[10] \
>        + avcclass[11] + avcclass[12] + avcclass[13]

Is better written
     classsum = ''.join(avcclass[:14])


> addzeros = {1:"0", 2:"00", 3:"000", 4:"0000"}
> ...
> ... addzeros[numzeros] + lanex[i-1]

Good idea, but in this case python provides an easier alternative:
  ... '0' * numzeros + lanex[i - 1]
Or use the 'rjust' method which right-justifies a string:
  ... lanex[i - 1].rjust(5, '0')


> for i in range(1,Nscheme+1):
>      numzeros = 5 - int(len(lanex[i-1]))
>      avcclass.append(addzeros[numzeros] + lanex[i-1])
>      Nlanex.append(int(lanex[i-1])

Is better as
  for i in range(Nscheme):
      ... use i rather than i - 1

(I assume Visual Basic for loops are off by one).

In fact, this loop is even better if you just iterate over lanex
itself. Using a loop index rather than iterating directly is a common
mistake.

for lane in lanex:
    avcclass.append(lane.rjust(5, '0'))
    Nlanex.append(int(lane))

Or even better, use list comprehensions to construct your two lists
explicitly:

avcclass = [lane.rjust(5, '0') for lane in lanex]
Nlanex = [int(lane) for lane in lanex]

Note, each rewrite makes the intention of the code clearer, as well as
being shorter. This makes your code easier to read and understand, and
less buggy.


Since all you do with avcclass is sum it, combine this with the
classsum optimisation above to get

classsum = ''.join(lane.rjust(5, '0') for lane in lanex[:14])
Nlanex = [int(lane) for lane in lanex]

>    lanex = []
>    if numlanes == 2:
>        lane1 = newlist1[2:2+Nscheme]
>        lanex.append(lane1)
>        lane2 = newlist1[2+Nscheme:2+Nscheme*2]
>        lanex.append(lane2)
>    else:
>        lane1 = newlist1[2:2+Nscheme]
>        lanex.append(lane1)
>        lane2 = newlist1[2+Nscheme:2+Nscheme*2]
>        lanex.append(lane2)
>        lane3 = newlist1[2+Nscheme*2:2+Nscheme*3]
>        lanex.append(lane3)
>        lane4 = newlist1[2+Nscheme*3:2+Nscheme*4]
>        lanex.append(lane4)

List comprehensions beat copy/paste:

total_schemes = 2 if numlanes == 2 else 4
lanex = [newlist1[2 + i * Nscheme:2 + (i + 1) * Nscheme]
    for i in range(total_schemes)]

HTH, and welcome to python!

--
Paul Hankin



From steve at holdenweb.com  Wed Sep  5 02:35:56 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 04 Sep 2007 23:35:56 -0700
Subject: list index()
In-Reply-To: <1188972560.323189.33880@d55g2000hsg.googlegroups.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>	<87hcmhebwv.fsf@benfinney.id.au>
	<5jn9qgFdmbcU3@mid.uni-berlin.de>	<1188886461.236237.168230@y42g2000hsy.googlegroups.com>	<fbl6pe$2vd$1@lust.ihug.co.nz>
	<871wdd92vk.fsf@benfinney.id.au>
	<1188972560.323189.33880@d55g2000hsg.googlegroups.com>
Message-ID: <fbliod$5uk$1@sea.gmane.org>

TheFlyingDutchman wrote:
>> I explain it by noting that list.index and dict.get serve totally
>> different purposes. The former returns the index given a value; the
>> latter returns a value given a key.
> 
> And the former raises an exception if the value is not found, while
> the latter returns None if the value is not found.
> 
>> There are many areas of poor symmetry in the language and libraries;
>> it isn't particularly clever or difficult to find them if one
>> looks. Doing so doesn't appear to illustrate any point I see relevant
>> in this thread.
> 
> It has been stated in this thread, that in Python, exceptions are used
> differently than in other languages. Rather than just use them for
> catastrophic errors that can't be dealt with, Python raises exceptions
> on routine and survivable situations such as an item not found in a
> list. It was mentioned that an exception is more Pythonic than
> returning a "not found" value.
> 
> Someone pointed out that find() in str was a contradiction to this
> since it doesn't throw an exception but returns a "not found" value,
> and the response was that it was believed that find() would be removed
> from the language (if so, it does not currently show up on the
> "removed list" as has_key() and a few others do -
> http://docs.python.org/dev/3.0/whatsnew/3.0.html) and was only there
> for "historical reasons".
> 
> I don't believe the poster was trying to illustrate a point already
> mentioned in the thread, but to give a contradiction to statements in
> the thread. He was asking the question - why doesn't dict.get() throw
> an exception on not found if that is the Pythonic way?
> 
> 
Because it's an explicit short-cut for a frequently-required paradigm. 
It's effectively an extension to dict indexing - which, you will recall, 
*does* raise an exception when the key is not found. Does *everything* 
have to raise such an exception?

There's no requirement for Python to be 100% consistent in its 
application of a principle, but on the whole it is reasonably consistent.

For Pete's sake stop wasting your time and go do some programming. 
Nothing will ever be perfect, not even Python ;-)

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From HDoran at air.org  Wed Sep  5 09:30:32 2007
From: HDoran at air.org (Doran, Harold)
Date: Wed, 5 Sep 2007 09:30:32 -0400
Subject: Checking if elements are empty
Message-ID: <2323A6D37908A847A7C32F1E3662C80E010A0246@dc1ex01.air.org>

Dear list:

Suppose I have a string as follows

x = '  \t'ff'

I can split this up as

y = x.split('\t')

Which gives

[ '  ', 'ff']

len(y)
2

Is there a way to check if the first element of y is null?

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From http  Sat Sep 22 17:09:13 2007
From: http (Paul Rubin)
Date: 22 Sep 2007 14:09:13 -0700
Subject: Would Anonymous Functions Help in Learning Programming/Python?
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<XIbJi.36$ua4.28@newssvr22.news.prodigy.net>
	<7xy7eysfc0.fsf@ruckus.brouhaha.com>
	<hXeJi.7647$FO2.4554@newssvr14.news.prodigy.net>
Message-ID: <7xbqbu1k7a.fsf@ruckus.brouhaha.com>

Bryan Olson <fakeaddress at nowhere.org> writes:
> How anonymous is that function when we can see that its name is 'h'?

h is out of scope after compose returns, so the function is anonymous
in the sense that there is no symbol bound to the function, through
which you can refer to it.

>      import math
> 
>      f = compose(math.sin, math.cos)
>      print f.__name__

I prefer to think of __name__ as just some debugging info stuck inside
the closure, though actually Python is introspective enough to be able
to let you locate and call a function whose __name__ is "h".  Of
course there might be more than one:

    f = compose(math.sin, math.cos)
    g = compose(math.sqrt, math.tan)
    print f.__name__, g.__name__

> Nevertheless, def is never a real anonymous function constructor.

Well, def constructs a function with a name, but the function can stay
around after the name goes away, after which I'd say the function is
nameless.  One could otherwise say that (lambda x: x+x) is not
anonymous either, since id(lambda ...) is a unique label stuck to it
like a __name__.

> If our concern is Python's suitability for studying principles of
> programming, I think I'm on stronger ground. Python is great for
> getting things done. It is easy to learn in the sense of learning
> to to use if for practical tasks. Python's actual semantics are not
> as neat and clean as some other languages.

Fair enough.


From bj_666 at gmx.net  Wed Sep 19 07:56:19 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 19 Sep 2007 11:56:19 GMT
Subject: lambda-funcs problem
References: <1190201984.062329.182460@k79g2000hse.googlegroups.com>
Message-ID: <5lch33F78tegU2@mid.uni-berlin.de>

On Wed, 19 Sep 2007 04:39:44 -0700, dmitrey.kroshko wrote:

> I need to create a Python list of lambda-funcs that are dependent on
> the number of the ones, for example
> 
> F = []
> for i in xrange(N):
>     F.append(lambda x: x + i)
> 
> however, the example don't work - since i in end is N-1 it yields x+
> (N-1) for any func.
> 
> So what's the best way to make it valid?

The variable is bound to the name `i` when the lambda function is
created not to the value that `i` had at that time.  The idiomatic way is
to use a default value for an argument because those are evaluated at
definition time of functions::

    F.append(lambda x, i=i: x + i)

Ciao,
	Marc 'BlackJack' Rintsch


From gagsl-py2 at yahoo.com.ar  Mon Sep 17 19:20:09 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 17 Sep 2007 16:20:09 -0700
Subject: qa
In-Reply-To: <1190067743.203008.162280@k79g2000hse.googlegroups.com>
References: <46EEEE71.80108@gmail.com>
	<mailman.677.1190066333.2658.python-list@python.org>
	<1190067743.203008.162280@k79g2000hse.googlegroups.com>
Message-ID: <1190071209.302485.48700@22g2000hsm.googlegroups.com>

On 17 sep, 19:22, John Machin <sjmac... at lexicon.net> wrote:
> On Sep 18, 7:59 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>
> > It doesn't matter how many spaces you put in between, capwords will
> > collapse all of them into a single space.
>
> This is true. However AFAICT the OP doesn't have multiple spaces --
> unless of course his unspecified s1 had trailing space(s) and/or his
> unspecified s2 had leading space(s)!!

Yes, unfortunately (to the OP) my crystall ball is on repair, and I'm
using the spare one, which is not as good and has a narrower range
than my large ball :)

--
Gabriel Genellina



From malibuster at gmail.com  Wed Sep  5 12:13:29 2007
From: malibuster at gmail.com (malibuster at gmail.com)
Date: Wed, 05 Sep 2007 09:13:29 -0700
Subject: Text processing and file creation
Message-ID: <1189008809.718361.45790@g4g2000hsf.googlegroups.com>

I have a text source file of about 20.000 lines.
>From this file, I like to write the first 5 lines to a new file. Close
that file, grab the next 5 lines write these to a new file... grabbing
5 lines and creating new files until processing of all 20.000 lines is
done.
Is there an efficient way to do this in Python?
In advance, thanks for your help.



From byte8bits at gmail.com  Tue Sep 25 17:42:26 2007
From: byte8bits at gmail.com (byte8bits at gmail.com)
Date: Tue, 25 Sep 2007 21:42:26 -0000
Subject: comparing elements of a list with a string
In-Reply-To: <1190734785.439839.303030@50g2000hsm.googlegroups.com>
References: <1190734785.439839.303030@50g2000hsm.googlegroups.com>
Message-ID: <1190756546.077433.257760@57g2000hsv.googlegroups.com>

On Sep 25, 11:39 am, Shriphani <shripha... at gmail.com> wrote:

> If I have a string "fstab", and I want to list out the files in whose names
> the word fstab appears should I go about like this :
>
> def listAllbackups(file):
>     list_of_files = os.listdir("/home/shriphani/backupdir")
>     for element in list_of_files:
>          if element.find(file) != -1:
>              date = ###
>              time = ####
>               return (date, time)

I would do something like this instead:

>>> for root, dirs, files in os.walk('.'):
...   for f in files:
...     if 'text' in f:
...       print f
...
gimp-text-tool
gimp-text-tool.presets
text.py~
textwrap.pyc
textwrap.py
...

You can append the output to a list and return that list if you want
to encapsulate this in a function.



From dejanews at email.com  Sun Sep  9 21:48:45 2007
From: dejanews at email.com (samwyse)
Date: Mon, 10 Sep 2007 01:48:45 GMT
Subject: Symbolic Link
In-Reply-To: <1187879000.370831.118780@j4g2000prf.googlegroups.com>
References: <1187475296.173269.263080@k79g2000hse.googlegroups.com>
	<iwWxi.28394$RX.20505@newssvr11.news.prodigy.net>
	<1187555373.202634.163160@57g2000hsv.googlegroups.com>
	<1187646982.760523.195750@i38g2000prf.googlegroups.com>
	<mailman.87.1187737527.32294.python-list@python.org>
	<1187879000.370831.118780@j4g2000prf.googlegroups.com>
Message-ID: <1o1Fi.33230$RX.26068@newssvr11.news.prodigy.net>

mosscliffe wrote:
> On 22 Aug, 00:05, Ian Clark <icl... at mail.ewu.edu> wrote:
>>
>>>On Aug 19, 4:29 pm,mosscliffe<mcl.off... at googlemail.com> wrote:
>>>
>>>>The source file is in an area which python can see, but not the
>>>>browser.  I am trying to make a link in a browser friendly area so I
>>>>can use it to display an image file.
>>
>>My question would be why a symbolic link? Why not a hard link? Are the
>>two directories on different mount points? After the script finishes
>>does python need to see that image file again? Why not just move it?
> 
> I have tested a hard link now and it seems to work fine.  I am
> deleting the link/s at the end of the session/s.

This is a bit late, but the reason the symbolic link won't work is 
because it's the web-server that's resolving it.  The browser can only 
see things that the web-server, huh, serves, so what was meant in the 
first paragraph above was that the web server couldn't access the file 
in its original location.  If you create a sym-link, the web server 
opens the link, finds out the actual location of the file, and tries to 
open that file, which it still can't do.  A hard-link, OTOH, allows 
direct access to the contents of a file, as long as it is on the same 
filesystem.  No extra steps are required, so the process runs a few 
microseconds faster, and directory-level permissions can't get in the way.


From rbonvall at gmail.com  Tue Sep 11 23:08:48 2007
From: rbonvall at gmail.com (Roberto Bonvallet)
Date: Wed, 12 Sep 2007 03:08:48 -0000
Subject: "Variable variable name" or "variable lvalue"
In-Reply-To: <f9vn4l$d6n$02$1@news.t-online.com>
References: <1187199722.618893.281170@r29g2000hsg.googlegroups.com>
	<f9vn4l$d6n$02$1@news.t-online.com>
Message-ID: <1189566528.536915.219610@22g2000hsm.googlegroups.com>

On Aug 15, 4:19 pm, Peter Otten <__pete... at web.de> wrote:
> If you want to simplify things somewhat you can merge the two loops into
> one:
>
>     numbers = [12.5, 25, 12.5]
>     accu = Material(numbers[0])
>     for x in numbers[1:]:
>         accu += Material(x)
>     period = Slab(accu)

Better to use the `sum' builtin and a generator expression:

    period = Slab(sum(Material(x)) for x in numbers)

--
Roberto Bonvallet



From srijit at yahoo.com  Wed Sep 12 08:06:02 2007
From: srijit at yahoo.com (Srijit Kumar Bhadra)
Date: Wed, 12 Sep 2007 05:06:02 -0700
Subject: SIP examples
Message-ID: <1189598762.360580.119240@22g2000hsm.googlegroups.com>

I am trying to learn SIP (http://www.riverbankcomputing.co.uk/sip/)
these days. I do not see any examples similar to SWIG. http://www.swig.org/doc.html
has lots of examples. But for SIP, all I see is a reference guide
(http://www.riverbankcomputing.com/Docs/sip4/sipref.html).
Examples help. Where can I get examples for SIP 4.7?

Regards,
/Srijit



From Blinston_Fernandes at Dell.com  Mon Sep 17 22:17:17 2007
From: Blinston_Fernandes at Dell.com (Blinston_Fernandes at Dell.com)
Date: Tue, 18 Sep 2007 07:47:17 +0530
Subject: why does Configparser change names to lowercase ?
In-Reply-To: <fcmu6c$bh5$1@sea.gmane.org>
References: <46EAED39.9080209@gmail.com> <fcmu6c$bh5$1@sea.gmane.org>
Message-ID: <C38B725A049843478F1DA8F6A2448CDBC3F160@blrx3m12.blr.amer.dell.com>

This works ...

Cf=ConfigParser.ConfigParser()
Cf.optionxform=str
...

Blinston.
-----Original Message-----
From: python-list-bounces+blinston_fernandes=dell.com at python.org [mailto:python-list-bounces+blinston_fernandes=dell.com at python.org] On Behalf Of Joshua J. Kugler
Sent: Tuesday, September 18, 2007 3:44 AM
To: python-list at python.org
Subject: Re: why does Configparser change names to lowercase ?

On Friday 14 September 2007 12:21, stef mientki wrote:
> Why does  Configparser change names to lowercase ?
> 
> As Python is case sensitive (which btw I don't like at all ;-) but now 
> when really need the casesensitivity, because it handles about names 
> which should be recognized by human, it changes everything to 
> lowercase ????
> 
> thanks,
> Stef Mientki

According to the ConfigParser docs:

"All option names used in interpolation will be passed through the
optionxform() method just like any other option name reference. For example, using the default implementation of optionxform() (which converts option names to lower case), the values "foo %(bar)s" and "foo %(BAR)s" are equivalent."

So, it seems it would be trivial so sublcass ConfigParser, and reimplement
optionxform()

Hope that helps.

j

--
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE

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


From kenneth.m.mcdonald at sbcglobal.net  Tue Sep  4 15:15:43 2007
From: kenneth.m.mcdonald at sbcglobal.net (Kenneth McDonald)
Date: Tue, 04 Sep 2007 14:15:43 -0500
Subject: Questions on FOX GUI and Python
Message-ID: <46DDAEDF.8000500@sbcglobal.net>

Would anyone care to offer their opinions as to using Python with the 
FOX GUI toolkit? Ease of use, stability, power,
speed, etc., all thoughts would be appreciated.


Thanks,
Ken


From gagsl-py2 at yahoo.com.ar  Thu Sep 27 18:33:20 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 27 Sep 2007 19:33:20 -0300
Subject: making run time changes..
References: <000001c80107$4f9ff120$eedfd360$@iitk.ac.in>
	<fdgiju$516$2@sea.gmane.org>
	<002f01c80126$d08aee10$71a0ca30$@iitk.ac.in>
Message-ID: <op.tzb3lup3x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Thu, 27 Sep 2007 13:52:39 -0300, Piyush Jain <piyushj at cse.iitk.ac.in>  
escribi?:

>> I am new(almost) to python. I wish to making a server in which I can
>> make changes at run time. For example , add a method to a
>> class/attribute to object etc. by sending it messages.

To add a new attribute with a name known only at runtime, use setattr  
<http://docs.python.org/lib/built-in-funcs.html> either on the class (will  
be a class attribute then) or any individual instance.
To create a new method, just assign a function to the class.
I'd suggest first learning a bit more about Python until you are more  
fluent with the language. (And consider the risk of executing untrusted  
code from the outside).

-- 
Gabriel Genellina



From bj_666 at gmx.net  Tue Sep 11 02:18:08 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 11 Sep 2007 06:18:08 GMT
Subject: printing list containing unicode string
References: <1189432793.383166.156710@d55g2000hsg.googlegroups.com>
	<1189477580.214510.212420@22g2000hsm.googlegroups.com>
Message-ID: <5kmq90F4b65dU2@mid.uni-berlin.de>

On Mon, 10 Sep 2007 19:26:20 -0700, Xah Lee wrote:

> ?  Many Internet standards are defined in terms of textual data, and
> can't handle content with embedded zero bytes. 
> 
> Not sure what he mean by "can't handle content with embedded zero
> bytes". Overall i think this sentence is silly, and he's probably
> thinking in unix/linux.

No he's probably thinking of all the text based protocols (HTTP, SMTP, ?)
and that one of the most used programming languages, C, can't cope with
embedded null bytes in strings.

> ?  Encodings don't have to handle every possible Unicode
> character, .... 
> 
> This is inane. A encoding, by definition, turns numbers into binary
> numbers (in our context, it means a encoding handles all unicode chars
> by definition).

How do you encode chinese characters with the ISO-8859-1 encoding? This
encoding obviously doesn't handle *all* unicode characters.

> ?  
> UTF-8 has several convenient properties:
> 1. It can handle any Unicode code point.
> ...
>  
> 
> As mentioned before, by definition, any Unicode encoding encodes all
> unicode char set. The mentioning of above as a "convenient property"
> is inane.

You are being silly here.

Ciao,
	Marc 'BlackJack' Rintsch


From gagsl-py2 at yahoo.com.ar  Sun Sep 30 23:32:08 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 01 Oct 2007 00:32:08 -0300
Subject: s.split() on multiple separators
References: <1191160394.870241.171200@w3g2000hsg.googlegroups.com>
	<bkRLi.1723$hI7.1162@newssvr17.news.prodigy.net>
	<1191179790.181227.323480@k79g2000hse.googlegroups.com>
Message-ID: <op.tzh1funix6zn5v@gabriel2.softlabbsas.com.ar>

En Sun, 30 Sep 2007 16:16:30 -0300, <mrkafk at gmail.com> escribi?:

>> From my POV, if I want sequence from here to there, it should include
> both here and there.
>
> I do understand the consequences of making high bound exclusive, which
> is more elegant code: xrange(len(c)). But it does seem a bit
> illogical...

See this note from E.W.Dijkstra in 1982 where he says that the Python  
convention is the best choice.
http://www.cs.utexas.edu/users/EWD/transcriptions/EWD08xx/EWD831.html

-- 
Gabriel Genellina



From horpner at yahoo.com  Tue Sep  4 06:44:27 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Tue, 04 Sep 2007 10:44:27 GMT
Subject: OT: pronounciation [was: list index()]
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<1188497498.3468.60.camel@dot.uniqsys.com>
	<mailman.188.1188546300.28954.python-list@python.org>
	<0v2dnaYWyv4HWkrbnZ2dnUVZ_oTinZ2d@speakeasy.net>
	<1188551958.728836.137370@x35g2000prf.googlegroups.com>
	<fOadnfwlCJbQfErbnZ2dnUVZ_jCdnZ2d@speakeasy.net>
	<46D7E36D.4000301@timgolden.me.uk>
	<mailman.191.1188555581.28954.python-list@python.org>
	<1188591855.327294.181280@r34g2000hsd.googlegroups.com>
Message-ID: <slrnfdguql.1g8.horpner@FIAD06.norwich.edu>

On 2007-08-31, Paddy <paddy3118 at googlemail.com> wrote:
> On Aug 31, 11:19 am, Tim Golden <m... at timgolden.me.uk> wrote:
>> Tim Golden wrote:
>> > Erik Max Francis wrote:
>> >> Paddy wrote:
>>
>> >>> I say the 'oll' in troll like the 'ol' in frolic, and pronounce roll
>> >>> and role similarly.
>>
>> >>> My accent is probably from the East Midlands of the UK, but is not
>> >>> pronounced.
>> >> _Troll_ and _frolic_ aren't pronounced with the same "o" sound in any
>> >> accent I've ever heard of.  Which you pronounce _boat_ and _bot_ the
>> >> same way, too?
>>
>> > [Amusingly contemplating a trolling war about the pronunciation of "troll"]
>>
>> > Well they sound the same in my more-or-less South London accent.
>> > I can't write those funny phonetic symbols (and I hate to
>> > imagine the Unicode encoding hoops I'd have to jump through
>> > to make them readable anyway) but both "o"s sound short to me.
>> > Like "bot" rather than "boat" using your example.
>>
>> Since we're talking... I'm still a little startled when I listen
>> to some of the excellent webcasts that are being produced these
>> days (showmedo.com and friends) and hear American voices pronounce
>> Python... well, the way they do, with the stress and something of a
>> drawl on the second syllable. I'm sure it's just as amusing the other
>> way round: we pronounce it with the stress on the first syllable and
>> the characteristic short vowel sound in the second.
>> (Something like: Pie'thun).
>>
>> TJG
>
> The only true way of pronouncing Python (the computing language), is
> the way it is done at the beginning of Monty Pythons Flying Circus of
> course :-)
>
> Your right, the American way does make me pause.

Ya'll can keep yer gall-dern schwa outta my Pie-thawn, ya hear?

-- 
Neil Cerutti
Persons are prohibited from picking flowers from any but their own graves.
--sign at Pennsylvania cemetery


From siona at chiark.greenend.org.uk  Wed Sep  5 07:52:13 2007
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 05 Sep 2007 12:52:13 +0100 (BST)
Subject: FCGI app reloading on every request
References: <46DCDE59.8060109@animats.com>
	<MPG.21478b09a5d2650d989710@news.individual.de>
	<qwhDi.23908$eY.9978@newssvr13.news.prodigy.net>
Message-ID: <nnt*By6Tr@news.chiark.greenend.org.uk>

John Nagle  <nagle at animats.com> wrote:
>    Tried putting this in the .htaccess file:
>
><Files *.fcgi>
>SetHandler fcgid-script
>Options ExecCGI
>allow from all
></Files>
>
><Files *.foo>
>ErrorDocument 403 "File type not supported."
></Files>
>
>     Even with that, a ".foo" file gets executed as a CGI script,
>and so does a ".fcgi" file.  It's an Apache configuration problem.

I'd look to see if you've got a AllowOverride None set somewhere
unhelpful (probably on the cgi-bin directory, although I note the
default Apache2 config on my machine here does it for the document
root too). Mind you, if you're managing this with a web tool rather
than having access to the Apache config files, it might not be so
straightforward to do.

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
   "Frankly I have no feelings towards penguins one way or the other"
        -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From cmpython at gmail.com  Sun Sep 30 13:27:08 2007
From: cmpython at gmail.com (cmpython at gmail.com)
Date: Sun, 30 Sep 2007 17:27:08 -0000
Subject: Can you please give me some advice?
In-Reply-To: <13fuv0gh7342r27@corp.supernews.com>
References: <mailman.1300.1191147737.2658.python-list@python.org>
	<13fuv0gh7342r27@corp.supernews.com>
Message-ID: <1191173228.756531.225860@o80g2000hse.googlegroups.com>


> Hello World in Ruby (and a few other languages):http://www.oreillynet.com/ruby/blog/2005/12/hello_world.html

> Hello World in Python:http://python.about.com/od/gettingstarted/ss/helloworld.htm

I know nothing of Ruby, but just the fact that in Ruby the Hello World
program is

puts 'Hello, World!'

whereas the Python Hello World program is

print 'Hello, World!'

suggests to me that Python is more intuitive because the word "print"
has a meaning in English that makes sense given what you want to do,
but "puts" just doesn't.  And, as someone who has been learning Python
from almost no knowledge of programming, I've found it is not too bad
in trying to keep as reasonably close to a natural language like
English
as possible.

I also think the mandatory indenting of Python is helpful in forcing
new programmers to be neat and see code blocks quickly.  Plus I doubt
the Ruby community has such a large group of helpful people and
libraries
and such (but I could be wrong about that, just assuming it based on
the
fact that Python has been around longer).

On the other hand, perhaps because Ruby is newer it has been able to
freshly start with advantages learned from the difficulties of other
languages.  Byung-Hee Hwang ought to go the Ruby group and see what
they are saying.

As far as English goes, Byung-Hee, you have to admit English grammar
is easy (though spelling is not so easy).  That anyone can speak and
write Chinese is impressive to me, as the language looks completely
impossible!  Good luck!




From joe at goldthwaites.com  Wed Sep 26 14:26:43 2007
From: joe at goldthwaites.com (Joe Goldthwaite)
Date: Wed, 26 Sep 2007 11:26:43 -0700
Subject: A question on python performance.
Message-ID: <000a01c8006a$cac4af00$6c01a8c0@applexp>

Hi everyone,

I'm a developer who's been using python for a couple of years.  I wrote a
fairly large application using it but I was learning the language at the
same time so it most of the code kind of sucks.

I've learned a lot since then and I've been going through my code trying to
organize it better and make better use of Python's features.  I'm still  not
an expert by any definition but I'm slowly getting better.

I've been working on a trend class that takes twelve monthly numbers and
returns a period to date, quarter to date, year to date and quarterly year
to date numbers for a specific period. This worked but I ended up with a lot
of code like this;

def getValue(trend, param, per):
   if param == 'Ptd':
     return trend.Ptd(per)
   elif param == 'Qtd':
      return trend.Qtd(per)
   elif param == 'Ytd':
      return trend.Ytd(per)
   elif param == 'YtdQ':
      return trend.YtdQ(per)

The code gets kind of wordy so I started trying to figure out how to call
them dynamically since the param type is the same as the method the
retrieves it.  I came up with this;

def getValue(trend, param, per):
   return trend.__class__.__dict__[param](trend, per)

That worked but it seems like the above line would have to do lots more
object look ups at runtime so I didn't think it would be very efficient.  I
thought maybe I could add a caller method to the trend class and I came up
with this;

class trend:
   ...
   ...
   ...
   def caller(self, param, *args):
      return self.__class__.__dict__[param](self, *args)

This simplified the getValue function to this;

def getValue(trend, param, per):
	return trend.caller(param, per)

Out of curiosity, I thought I'd do some benchmarking and see which one
performs the best. I executed three multiple times;

loop one.  Time=11.71 seconds;
    trend.Ptd(per)
    trend.Qtd(per)
    trend.Ytd(per)
    trend.YtdQ(per)

loop two. 12.107 seconds;
    trend.__class__.__dict__['Ptd'](trend, per)
    trend.__class__.__dict__['Qtd'](trend, per)
    trend.__class__.__dict__['Ytd'](trend, per)
    trend.__class__.__dict__['YtdQ'](trend, per)

loop three. 17.085 seconds;
    trend.caller('Ptd', per)
    trend.caller('Qtd', per)
    trend.caller('Ytd', per)
    trend.caller('YtdQ', per)

The first surprise was how close the first and second loops were.  I would
have thought the first loop would be much faster.  The second surprise was
how much slower the third loop was.  I know it has an extra call in there
but other than that, it's doing basically the same thing as loop two.  Is
there that much overhead in making a class method call?

Can anyone explain the differences?



From david at boddie.org.uk  Sun Sep 23 18:57:40 2007
From: david at boddie.org.uk (David Boddie)
Date: Mon, 24 Sep 2007 00:57:40 +0200
Subject: building a GUI
Message-ID: <200709240057.40451.david@boddie.org.uk>

On Mon Sep 24 00:08:09 CEST 2007, stef mientki wrote:
> Phil Thompson wrote:
> > On Sunday 23 September 2007, stef mientki wrote:
> 
> >> Could well be,
> >> but I never looked at PyQt seriously,
> >> because of their weird license.
> >
> > It's not weird. It's either GPL or proprietary. Your choice. That's as 
> > complicated as it gets.
>
> This is what I find "weird":
> == quote ==
> Trolltech's commercial license terms do not allow you to start 
> developing proprietary software using the Open Source edition.
> == end quote ==

Well, if you know you're going to be developing proprietary software, what
on earth are you doing with the Open Source edition?

OK, perhaps by asking that rhetorical question I'm simplifying people's
reasons and motives for using Open Source (and in this case Free/Libre)
software to develop tools or solutions that they later want to release as
closed, proprietary products. There are lots of ways people can end up in
that position, of course. Some people find their way there by accident;
others know what the situation is going to be well in advance...

In any case, I think it's useful to be clear about what each license does
or does not allow, especially if this leads to people making informed
decisions well before they learn about the consequences. In this case, the
terms of the commercial license place certain demands on the licensee, just
as with many other commercial licenses.

If someone develops a product using a GPL-licensed library, they can always
release that product under the GPL, even if that's not what they had in
mind when they started. ;-)

David


From hniksic at xemacs.org  Thu Sep  6 04:56:57 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Thu, 06 Sep 2007 10:56:57 +0200
Subject: creating really big lists
References: <874pi92tr4.fsf@mulj.homelinux.net>
	<mailman.121.1189035929.2658.python-list@python.org>
	<1189057626.943757.210420@d55g2000hsg.googlegroups.com>
Message-ID: <877in4goiu.fsf@mulj.homelinux.net>

Dr Mephesto <dnhkng at googlemail.com> writes:

> I need some real speed!

Is the speed with the GC turned off sufficient for your usage?


From tokland at gmail.com  Sat Sep 22 11:04:19 2007
From: tokland at gmail.com (tokland at gmail.com)
Date: Sat, 22 Sep 2007 15:04:19 -0000
Subject: find difference in days from YYYYMMDD to YYYYMMDD
In-Reply-To: <mailman.920.1190453625.2658.python-list@python.org>
References: <mailman.920.1190453625.2658.python-list@python.org>
Message-ID: <1190473459.642519.288580@g4g2000hsf.googlegroups.com>

On 22 sep, 11:37, Konstantinos Pachopoulos <kostaspa... at yahoo.gr>
wrote:

> does any body now any such algorith? to find difference in days from
> YYYYMMDD to YYYYMMDD?

Once I needed the same and I wrote:

def days_difference(s1, s2):
    splitdate = lambda s: time.strptime(s, "%Y%m%d")[:3]
    str2date = lambda s: datetime.date(*splitdate(s))
    delta = str2date(s1) - str2date(s2)
    return delta.days

print days_difference("20071112", "20061029") # 379

Although I'm sure there is a better way.

arnau



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Sep 13 03:41:17 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 13 Sep 2007 09:41:17 +0200
Subject: Python 3K or Python 2.9?
In-Reply-To: <1189651204.408268.57580@19g2000hsx.googlegroups.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<87sl5j5r34.fsf@benfinney.id.au>
	<1189646281.569796.267940@d55g2000hsg.googlegroups.com>
	<87ir6f5mrq.fsf@benfinney.id.au>
	<1189651204.408268.57580@19g2000hsx.googlegroups.com>
Message-ID: <46e8e998$0$20168$426a34cc@news.free.fr>

TheFlyingDutchman a ?crit :
>>     >>> Foo.bar(foo, "spam")
>>     >>> foo.bar("spam")
> 
> That looks like a case of "There's more than one way to do it". ;)

Nope, on the contrary. The nice thing with this model is that you don't 
have distinct rules for functions and methods, since methods are just 
plain functions.

>> The latter two statements are equivalent. The 'instance.method(args)'
>> syntax is just sugar for 'Class.method(instance, args)'.
> 
> I think I saw where Guido Van Rossum had referred to something as
> "syntactic sugar" in some python.org page. I am not familiar with
> sugar as related to syntax. Is it being used as a synonym for "easier
> way of doing it"?

Yes. "syntactic sugar" mostly means "nicer, simpler syntax for something 
that could be done without". And one of the *great* strength of Python 
is that it exposes both the syntactic sugar for the most common uses 
case and the underlying implementation for most advanced tricks.


From tjreedy at udel.edu  Fri Sep 14 12:41:15 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 14 Sep 2007 12:41:15 -0400
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com><46e7974d$0$31726$426a74cc@news.free.fr><fc8fc9$4qa$1@news2.carnet.hr><5kq1hgF4r90oU1@mid.individual.net><1189618530.872819.136450@57g2000hsv.googlegroups.com><1189619033.968437.286580@g4g2000hsf.googlegroups.com><5kr8vlF53m8gU3@mid.individual.net><1189643616.826715.58150@d55g2000hsg.googlegroups.com><5ksoaoF5am8cU1@mid.individual.net><1189701793.466307.93210@g4g2000hsf.googlegroups.com><5ktfjqF5ctrvU2@mid.individual.net><46e98fd8$0$27757$426a34cc@news.free.fr><5ktre7F5ig0vU1@mid.individual.net><mailman.522.1189752157.2658.python-list@python.org>
	<5kv3neF5mo3hU3@mid.individual.net>
Message-ID: <fcedj8$q4l$1@sea.gmane.org>


"Bjoern Schliessmann" <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> wrote 
in message news:5kv3neF5mo3hU3 at mid.individual.net...
That's interesting. BTW, do you know something (apart from the dis
docs) that's worth reading if you're interested in Python byte
code?

------------------
That is the only Python specific thing I remember reading.  Of course, it 
helps that I learned assembler a long time ago, and that I have used an HP 
reverse-polish notation calculator (a fixed-size stack machine), and that I 
have seen and understand algorithms for turning prefix and infix to postfix 
notation.

tjr





From http  Sun Sep  2 13:37:01 2007
From: http (Paul Rubin)
Date: 02 Sep 2007 10:37:01 -0700
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
	<1188735642.391419.103650@19g2000hsx.googlegroups.com>
	<1188740716.423349.304370@y42g2000hsy.googlegroups.com>
	<1188742231.470668.29910@g4g2000hsf.googlegroups.com>
	<1i3t4ha.1r0xx7414w0taxN%aleax@mac.com>
	<7xfy1x0zhk.fsf@ruckus.brouhaha.com>
	<1i3t5rz.1l19v341prahzxN%aleax@mac.com>
Message-ID: <7xejhht1du.fsf@ruckus.brouhaha.com>

aleax at mac.com (Alex Martelli) writes:
> Reusing xranges is exactly what my code was doing 

Oh cool, I missed that, I was just going by the text description.
Looking at the code, yes, it's re-using the xranges.  Thanks.


From dstromberglists at gmail.com  Mon Sep 24 18:38:38 2007
From: dstromberglists at gmail.com (Dan Stromberg)
Date: Mon, 24 Sep 2007 15:38:38 -0700
Subject: Making a small change to a large XML document
Message-ID: <pan.2007.09.24.22.38.37.790708@gmail.com>


Say I want to take an existing XML document, and change the value="9997"
and value="9998" to two different numbers, without changing any of the
rest of the document - not even changing comments or indentation, if
avoidable.

What's the best way of doing it in python?

  <bean id="cs" class="c.d.q.s.C">
    <property name="p" value="9997"/>
    <property name="mP" value="9998"/>
    <property name="g" value="cs"/>
    <property name="e" value="t"/>
  </bean>

My .xml file is full of such beans.

I've played around with minidom a little in the past, and I'm targetting
python 2.5.1.

Thanks!



From zentraders at gmail.com  Wed Sep 12 20:08:50 2007
From: zentraders at gmail.com (Zentrader)
Date: Wed, 12 Sep 2007 17:08:50 -0700
Subject: File Parsing Question
In-Reply-To: <mailman.456.1189636092.2658.python-list@python.org>
References: <mailman.455.1189630858.2658.python-list@python.org>
	<1189634861.631219.143310@57g2000hsv.googlegroups.com>
	<mailman.456.1189636092.2658.python-list@python.org>
Message-ID: <1189642130.651522.273310@d55g2000hsg.googlegroups.com>

> for line in inp.readlines():

If you are now using readlines() instead of readline(), then
a) it is only used once to read all data into a container
b) you can access each element/line by it's relative number

data=open(filename, "r").readlines()
for eachline in data :   (not readlines())

so try
print data[0] ## first rec
print data[9] ## 10th rec, etc

you can use
ctr = 0
for eachline in data:
   ##do something
   if ctr > 0:
      print "this line is", eachline          ## or data[ctr]
      print "prev_line = ", data[ctr-1]
   ctr += 1

or a slightly different way
stop = len(data)
ctr=0
while ctr < stop:
   ## do something
   if ctr > 0 :
      this_line = data[ctr]
      prev_line = data[ctr-1]
   ctr += 1

Sorry, I don't use file.seek() so can't help there



From kostaspaxos at yahoo.gr  Thu Sep 20 03:12:43 2007
From: kostaspaxos at yahoo.gr (Konstantinos Pachopoulos)
Date: Thu, 20 Sep 2007 10:12:43 +0300
Subject: cannot __getitem__  from DB reply list 
Message-ID: <46F21D6B.8070107@yahoo.gr>

Hi,
i have the following function:
################################
    def getGNUPlotInputFeaturesVersion(self):
        s=""
        bugCommits=0
        trdocCommits=0
        featCommits=0
        ct=CommitType()

        for version in self.releaseVersionsList_:
            self.execQuery("SELECT 
msg,prssedDevsFileNum,prssedMakesFileNum,prssedDocsFileNum,prssedGraphsFileNum 
FROM Commit WHERE \
                                                    
projVersion=\""+version+"\";");
            for tuple in self.dbcursor_.fetchall():
                print tuple
################################
On the "print tuple" part, i get:

kostas at sqo-oss:~/workspace/SVNLog2DB$ jython 2LaunchQueries.py
Connection established to  database...
Traceback (innermost last):
  File "2LaunchQueries.py", line 5, in ?
  File "/home/kostas/workspace/SVNLog2DB/QueryExecutor.py", line 80, in 
getGNUPlotInputFeaturesVersion
AttributeError: __getitem__


As far as i have read, this means, that there is a problem getting 
something from the list, because it  might be FOR EXAMPLE , that 
"self.dbcursor_.fetchall()" doesn't return a list -i know it does. 
However, i did a "print self.dbcursor_.fetchall()" and i got a huge list 
of tuples...

Why can't i iterate the list? Any advice?


From ratchetgrid at googlemail.com  Mon Sep 17 19:22:37 2007
From: ratchetgrid at googlemail.com (Nathan Harmston)
Date: Tue, 18 Sep 2007 00:22:37 +0100
Subject: adding a static class to another class
In-Reply-To: <46eef7d2$0$13879$426a74cc@news.free.fr>
References: <mailman.629.1189984482.2658.python-list@python.org>
	<46eef7d2$0$13879$426a74cc@news.free.fr>
Message-ID: <676224240709171622g49c366e7x3b58342b662b6b9@mail.gmail.com>

Hi,

I guess my description was a bit rubbish in retrospec, I dont even
think the title of my email made sense....it doesnt to me now:

class Manager(object):
  def __init__(self):
    pass
  def dosomething(self):
    return "RESULTS"

class Foo(object):
  def __init__(self):
    self.a = "NEE"

What I m trying to do is end up with the following syntax:

f = Foo() # instantiates a Foo object
g= Foo.objects.dosomething() # returns "RESULTS"

The best way I ve found of doing this is overriding new

class Foo(object):
    def __new__(cls, *args, **kw):
      cls.objects = Manager()

----> If I do it like this, I get exactly what I want - especially if
I change the new method in Manager to one supplied by Bruno.

However, I m playing around with SQLAlchemy (which is going to be used
by some of the Managers I create, others will use different things)
which means that overriding new is not allowed, I cant assign a mapper
to Foo.

So I was trying to think of another way of doing cls.objects =
Manager()....and the only solution I could think of was to use a
decorator and try to do it somehow.......

>From Brunos answer I guess a decorator is not a good way of
accomplishing this, so if there anyway of doing this without using a
metaclass......or by using a decorator or not....any help would be
greatly appreciated.

Many Thanks in advance

Nathan









On 17/09/2007, Bruno Desthuilliers
<bdesth.quelquechose at free.quelquepart.fr> wrote:
> Nathan Harmston a ?crit :
> > HI,
> >
> > I m trying to start an api in a similar way to the djangic way of
> > Class.objects.all(). Ie objects is a "Manager" class.
> >
> > So:
> >
> > class Foo(object):
> >    def __init__(self):
> >         self.test = "NEE"
> >
> > class Manager(object):
> >     def __init__(self):
> >         pass
> >    def all(self):
> >        return "COCONUTS"
> >
> > Because of how some of the code is set up I cant use
> > metaclasses........so I try to use a decorator:
> >
> > def addto(instance):
> >     def decorator(f):
> >         import new
> >         f = new.instancemethod(f, instance, instance.__class__)
> >         setattr(instance, "objects", f)
> >         return f
> >     return decorator
> >
> > class Manager(object):
> >     @addto(Foo)
> >     def __init__(self):
> >        .............
> >
> > however this only binds the init method to the Foo.objects, so not
> > what I want.
>
> Indeed.
>
> > If I try using classmethod...then it just says the
> > Foo.objects doesnt exist.
>
> You mean decorating Manager.__init__ with classmethod ???
>
> I may be wrong, but I suspect you don't have a clear idea of what you're
> doing here.
>
> > Does anyone have any ideas how I can accomplish this using decorators?
>
> Yes : don't use a decorator !-)
>
> Instead of asking for how to implement what you think is the solution,
> you might be better explaining the problem you're trying to solve.
>
> > And also preventing more than one Manager instance instantiated at one
> > time.
>
> Q&D:
>
> class Singleton(object):
>      def __new__(cls):
>          if not hasattr(cls, '_inst'):
>              cls._inst = object.__new__(cls)
>          return cls._inst
>
>
> Same remark as above...
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From sjmachin at lexicon.net  Wed Sep  5 09:09:24 2007
From: sjmachin at lexicon.net (John Machin)
Date: Wed, 05 Sep 2007 06:09:24 -0700
Subject: creating really big lists
In-Reply-To: <1188985838.661821.41530@k79g2000hse.googlegroups.com>
References: <1188985838.661821.41530@k79g2000hse.googlegroups.com>
Message-ID: <1188997764.337396.15640@r34g2000hsd.googlegroups.com>

On Sep 5, 7:50 pm, Dr Mephesto <dnh... at googlemail.com> wrote:
> Hi!
>
> I would like to create a pretty big list of lists; a list 3,000,000
> long, each entry containing 5 empty lists. My application will append
> data each of the 5 sublists, so they will be of varying lengths (so no
> arrays!).

Will each and every of the 3,000,000 slots be used? If not, you may be
much better off storagewise if you used a dictionary instead of a
list, at the cost of slower access.

Cheers,
John



From paul.nospam at rudin.co.uk  Thu Sep 20 12:53:57 2007
From: paul.nospam at rudin.co.uk (Paul Rudin)
Date: Thu, 20 Sep 2007 17:53:57 +0100
Subject: An Editor that Skips to the End of a Def
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
Message-ID: <87odfxjn16.fsf@rudin.co.uk>

"W. Watson" <wolf_tracks at invalid.com> writes:

> Is there an editor that allows one to position to put the cursor and
> then by pushing some button goes to the end of the def?

C-M-e in emacs/python-mode.


From grante at visi.com  Tue Sep  4 11:34:34 2007
From: grante at visi.com (Grant Edwards)
Date: Tue, 04 Sep 2007 15:34:34 -0000
Subject: How do I get triangles from a vtkPolyData object?
References: <13do9eh8dtqa236@corp.supernews.com>
Message-ID: <13dquoa1r252o60@corp.supernews.com>

On 2007-09-03, Grant Edwards <grante at visi.com> wrote:

Is there _any_ documentation for the Python bindings to the vtk
library?   I'm still beating my head against a wall trying to
figure out how to get the actual data out of vtk objects when
Python doesn't make visible the required "Get" methods....



> I posted this question to the vtk mailing list last week:
>
>   I've been Googling and wandering through the class references
>   most of the afternoon, but I can't figure out how to get the
>   triangles out of the vtkPolyData that vtkDelaunay2D produces?
>
>   I can get the vertex corredinates like this:
>
>     delny = vtk.vtkDelaunay2D()
>     delny.SetInput(profile)
>     delny.SetTolerance(0.001)
>     delny.Update()
>
>     o = delny.GetOutput()
>
>     vertexes = [o.GetPoint(i) for i in xrange(o.GetNumberOfPoints())]
>
>   I can see that there are 84 triangles, and 'o' is a vtkPolyData
>   object that has 84 cells and 84 polygons, so they obviously
>   represent the triangles, but I can't figure out how to get
>   something useful out of the cells or polys.
>
> I got multiple replies telling me that I need to make calls to
> o.GetNextCell().  The posters were even kind enough to include
> examples in C++ showing how to do a delaunay triangulation and
> retrieve the triangle info.

I accidentally left out a step -- it's actually a vtkCellArray
object obtained by calling o.GetPolys() that is missing the
GetCell() and GetNextCell() methods which I need to call.

-- 
Grant Edwards                   grante             Yow! My mind is a potato
                                  at               field ...
                               visi.com            


From gagsl-py2 at yahoo.com.ar  Fri Sep 14 00:23:52 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 14 Sep 2007 01:23:52 -0300
Subject: Setting stdout encoding
References: <1189416350.069995.220250@w3g2000hsg.googlegroups.com>
	<cfb578b20709100602i4146f5c0hd2a1343f644a90f@mail.gmail.com>
	<op.tygmb9nux6zn5v@gabriel2.softlabbsas.com.ar>
	<cfb578b20709110358n5801c19ie21d95ef1161e4c0@mail.gmail.com>
	<op.tykwpjijx6zn5v@gabriel2.softlabbsas.com.ar>
	<cfb578b20709130408u2bf27cabl72d230f5252480a6@mail.gmail.com>
	<00e601c7f5fb$43d5ccf0$0203a8c0@MOUSE>
Message-ID: <op.tymmh2x3x6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 13 Sep 2007 08:43:11 -0300, Ryan Ginstrom <software at ginstrom.com>  
escribi?:

>> On Behalf Of Fabio Zadrozny
>> Makes sense... Do you think that creating a new object,
>> setting it as sys.stdout and overriding its write() method to
>> check for a unicode string to do
>> original_stdout.write(unicode_str.encode(my_encoding)) would
>> do it?
>
> Here's an output stream encoder I have used. It might be kind of  
> screwball,
> so I'd welcome any feedback on it, but it does work for encoding output
> streams.

Looks fine to me, just two comments:

>     def write(self, obj):
>         """Wraps the output stream's write method, encoding it with
>         the specified encoding"""
>
>         self.stdout.write(obj.encode(self.encoding))

You should check that obj is an unicode object before calling encode.  
Strings should not be encoded.

>     def __getattr__(self, attr):
>         """Delegate everything but write to the stream"""
>
>         if attr != "write":
>             return getattr(self.stdout, attr)
>         return self.write

__getattr__ is only called when the attribute has NOT been found in the  
usual way, so checking for "write" is unnecesary. Just return  
getattr(self.stdout, attr) always.

-- 
Gabriel Genellina



From steven at REMOVE.THIS.cybersource.com.au  Fri Sep  7 06:34:08 2007
From: steven at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Fri, 07 Sep 2007 10:34:08 -0000
Subject: Checking if elements are empty
References: <2323A6D37908A847A7C32F1E3662C80E010A0246@dc1ex01.air.org>
	<fbme5d$qa$1@sea.gmane.org>
	<mailman.93.1189003016.2658.python-list@python.org>
	<fbqedh$31g$1@lust.ihug.co.nz>
	<46e115e5$0$7691$9b4e6d93@newsspool2.arcor-online.net>
Message-ID: <pan.2007.09.07.10.34.04@REMOVE.THIS.cybersource.com.au>

On Fri, 07 Sep 2007 11:12:05 +0200, Wildemar Wildenburger wrote:

> Lawrence D'Oliveiro wrote:
>> In message <mailman.93.1189003016.2658.python-list at python.org>, Chris
>> Mellon wrote:
>> 
>>> On 9/5/07, Steve Holden <steve at holdenweb.com> wrote:
>>>> Doran, Harold wrote:
>>>>> Is there a way to check if the first element of y is null?
>>>>>
>>>> len(y[0]) == 0
>>>>
>>> Better spelled as
>>>
>>> if y[0]:
>> 
>> Not a good idea.
> 
> Why not?


What happens if y is an empty list?


-- 
Steven.



From mail at microcorp.co.za  Sat Sep  1 02:28:21 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 1 Sep 2007 08:28:21 +0200
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com><46d674c2$0$417$426a34cc@news.free.fr><1188496588.750629.208100@g4g2000hsf.googlegroups.com>	<1188497498.3468.60.camel@dot.uniqsys.com><mailman.188.1188546300.28954.python-list@python.org>
	<0v2dnaYWyv4HWkrbnZ2dnUVZ_oTinZ2d@speakeasy.net>
Message-ID: <003301c7ec61$4b6d8500$03000080@hendrik>

 "Erik Max Francis" <ma...e.com> wrote:


> Hendrik van Rooyen wrote:
> 
> > weird this - maybe a native English speaker can comment - 
> > when I pronounce what fishermen do - it rhymes with roll,
> > but when I am talking about the thing that lives under bridges
> > and munches goats, the "O" sound is shorter, and more 
> > towards the back of my mouth.
> 
> Native English accents vary as well, but _roll_ rhymes with _troll_, not 
> _trawl_.  _Trawl_ would rhyme with _fall_, and _fall_ definitely doesn't 
> rhyme with _roll_.
> 

I did not mean using a net to scour the seabed - Trawl,
I meant using a spoon to see what you can induce to strike - Troll

- Hendrik



From gregpinero at gmail.com  Sun Sep 23 00:16:43 2007
From: gregpinero at gmail.com (gregpinero at gmail.com)
Date: Sun, 23 Sep 2007 04:16:43 -0000
Subject: subprocess -popen - reading stdout from child - hangs
In-Reply-To: <1190518129.356844.242710@19g2000hsx.googlegroups.com>
References: <1190518129.356844.242710@19g2000hsx.googlegroups.com>
Message-ID: <1190521003.928634.48900@d55g2000hsg.googlegroups.com>

On Sep 22, 11:28 pm, "gregpin... at gmail.com" <gregpin... at gmail.com>
wrote:
> Let's say I have this Python file called loop.py:
>
> import sys
> print 'hi'
> sys.stdout.flush()
> while 1:
>     pass
>
> And I want to call it from another Python process and read the value
> 'hi'.  How would I do it?
>
> So far I have tried this:
>
> >>> proc = subprocess.Popen('python /home/chiefinnovator/loop.py',shell=True,stdin=subprocess.PIPE,stdout=subprocess.PIPE)
> >>> proc.stdout.read()
>
> But it just hangs at read()
>
> proc.communicate() also just hangs.  What am I doing wrong?  Please
> advise.

Well, using this subclass of subprocess.Popen fixes the problem
(http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/440554)

I don't understand how it works though.  Would anyone mind
explaining?  I'm thinking there's something fundamental about Unix
processes I'm not understanding.

-Greg



From timr at probo.com  Sun Sep 16 22:41:59 2007
From: timr at probo.com (Tim Roberts)
Date: Mon, 17 Sep 2007 02:41:59 GMT
Subject: curses: x, y positioning
References: <1189891633.622313.81850@r29g2000hsg.googlegroups.com>
Message-ID: <m9qre35si8tujadfs6d0ukk4f9rhdgvuao@4ax.com>

7stud <bbxx789_05ss at yahoo.com> wrote:

>I can't see to get any y, x coordinates to work with curses.  Here is
>an example:
>
>import curses
>
>def my_program(screen):
>    while True:
>        ch = screen.getch()
>        if ch == ord("q"):
>            break
>        if ch <= 255:
>            screen.addstr(30, 10, "*%s*" % chr(ch))
>            screen.refresh()
>
>curses.wrapper(my_program)

Don't you want mvaddstr?  (And remember that y comes first.)
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From gavin at madzag.com  Fri Sep 14 00:57:43 2007
From: gavin at madzag.com (Gavin Tomlins)
Date: Fri, 14 Sep 2007 14:57:43 +1000
Subject: Spaces from string specifier
Message-ID: <03a601c7f68b$ccdf1ed0$669d5c70$@com>

Greetings all,

 

I'm trying to work out when using a format specifier I get spaces in the
resulting string.  Eg. Looking at the outputted string you can see that
there are spaces after T5LAT, F4LAT etc. as I result from trying to keep the
code aligned 

 

Does anyone have any insights in how to prevent this ? 

 

Regards

 

Gavin

 

--- Code Fragment ---

 

fmtSqlP300Amp = 'UPDATE Patient SET  \

                O2AMP = "%s", O1AMP = "%s", OzAMP = "%s", PzAMP = "%s",
P4AMP = "%s", CP4AMP = "%s", T6AMP = "%s", C4AMP = "%s", TP8AMP = "%s",
T4AMP = "%s", T5AMP = "%s", P3AMP = "%s", \

                CP3AMP = "%s", CPzAMP = "%s", CzAMP = "%s", FC4AMP = "%s",
FT8AMP = "%s", TP7AMP = "%s", C3AMP = "%s", FCzAMP = "%s", FzAMP = "%s",
F4AMP = "%s", F8AMP = "%s", \

                T3AMP = "%s", FT7AMP = "%s", FC3AMP = "%s", F3AMP = "%s",
FP2AMP = "%s", F7AMP = "%s", FP1AMP = "%s" \

                WHERE Pat_Id = "%s;"'

 

sqlAmpString = fmtSqlP300Amp % (
self.ERPAmpSites[O2],self.ERPAmpSites[O1],self.ERPAmpSites[Oz],self.ERPAmpSi
tes[Pz],self.ERPAmpSites[P4],self.ERPAmpSites[CP4],self.ERPAmpSites[T6], \

 
self.ERPAmpSites[C4],self.ERPAmpSites[TP8],self.ERPAmpSites[T4],self.ERPAmpS
ites[T5],self.ERPAmpSites[P3],self.ERPAmpSites[CP3], \

 
self.ERPAmpSites[CPz],self.ERPAmpSites[Cz],self.ERPAmpSites[FC4],self.ERPAmp
Sites[FT8],self.ERPAmpSites[TP7],self.ERPAmpSites[C3], \

 
self.ERPAmpSites[FCz],self.ERPAmpSites[Fz],self.ERPAmpSites[F4],self.ERPAmpS
ites[F8],self.ERPAmpSites[T3],self.ERPAmpSites[FT7], \

 
self.ERPAmpSites[FC3],self.ERPAmpSites[F3],self.ERPAmpSites[FP2],self.ERPAmp
Sites[F7],self.ERPAmpSites[FP1], self.ERPPatId)

 

 

print sqlAmpString

--- Output ---

....................................................

sqlAmpString

....................................................

UPDATE Patient SET                  O2AMP = "2.43119", O1AMP = "2.77413",
OzAMP = "2.47781", PzAMP = "2.50786", P4AMP = "4.579", CP4AMP = "3.50302",
T6AMP = "9.55172", C4AMP = "1.21119", TP8AMP = "5.6498", T4AMP = "1.29149",
T5AMP = "0.565705", P3AMP = "-0.957866",                 CP3AMP =
"-0.231566", CPzAMP = "0.970299", CzAMP = "-0.214471", FC4AMP = "-0.607667",
FT8AMP = "-0.226904", TP7AMP = "-1.51269", C3AMP = "-1.26248", FCzAMP =
"-1.61319", FzAMP = "-2.55086", F4AMP = "-1.87688", F8AMP = "-1.11846",
T3AMP = "-1.98619", FT7AMP = "-2.0613", FC3AMP = "-1.8458", F3AMP =
"-2.23433", FP2AMP = "-2.01364", F7AMP = "-1.80539", FP1AMP = "-2.00328"
WHERE Pat_Id = "GT0001;"

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From hanke at brailcom.org  Thu Sep 20 09:24:22 2007
From: hanke at brailcom.org (Hynek Hanke)
Date: Thu, 20 Sep 2007 09:24:22 -0400
Subject: pdb attach?
Message-ID: <46F27486.4000504@brailcom.org>


Hello,

please, is there something like 'attach' in pdb yet? My application uses 
threads
and when it freezes (e.g. due to a deadlock situation), I'd like to get 
the traceback
of all threads and inspect at which point did the application get into 
problems.
Or could I send a signal to such a python process so that it would 
output backtraces
from all threads before terminating?

Because currently, if a thread runs into deadlock problems (or a thread 
fails on
an exception and the other thread can't join it), I have no way of 
determining
what went wrong.

Such processes are not possible to terminate via CTRL-C in the 
interpreter, so
I can't get the backtrace this way. Furthermore, I also need to debug 
subprocesses,
so these are difficult to invoke interactively.

I'm happy for any suggestions.

Thank you,
Hynek Hanke


From bignose+hates-spam at benfinney.id.au  Tue Sep 18 19:11:37 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 19 Sep 2007 09:11:37 +1000
Subject: super() doesn't get superclass
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
Message-ID: <876427zhzq.fsf@benfinney.id.au>

Bruno Desthuilliers <bruno.42.desthuilliers at wtf.websiteburo.oops.com> writes:

> Ben Finney a ?crit :
> > Evan Klitzke <evan at yelp.com> writes:
> >> On Tue, 2007-09-18 at 14:15 +1000, Ben Finney wrote:
> >>> [the 'super' function] doesn't return the superclass, it returns
> >>> the next class in the MRO, whether that's a superclass or not.
> >> The next class in the MRO _is_ a superclass.
> >
> > [demonstration that the next class in the MRO is not necessarily a
> > superclass]
> >
> > You seem to be saying that now suddenly D *is* a superclass of
> > A. 
> 
> I don't see such an assertion in Evan's answer. Chapter and verse
> ???

I've trimmed the quoting to make it clearer.

Evan is claiming that "the next class in the MRO _is_ a superclass",
apparently by his definition or some other that I've not seen.

I've shown a fairly simple multiple-inheritance hierarchy where the
next class in the MRO is not an ancestor of the subject class, but is
instead a class that merely shares a common ancestor.

Either "superclass of A" is equivalent to "ancestor class of A", or
it's not. I maintain that many programmers will expect that it is, but
Evan's assertion says otherwise. It can't be both.

> > That's certainly not what users will think of when they think
> > "superclass" though.
> 
> If a class X is in the MRO of call Y, then X is a superclass of Y.

That goes completely against what Alex Martelli told me, which was
that "superclass" can be thought of as synonymous with "ancestor".

> I agree that the documentation for super is somewhat misleading (and
> obviously wrong),

Well, that's the first time someone has acknowledged that in this
thread, so I guess this is something.

> but it still *give access to* (at least one of) the superclass(es).

Only if you allow "some class somewhere in the inheritance tree, even
one this class never inherited from directly or indirectly" to be in
the definition of "superclass".

I'm arguing that what people mean by "superclass" is "a direct or
indirect ancestor class", and it's highly misleading to imply that by
the function name what that's not what the function does.

> >>> After reading the rest of the article, I'm amazed that 'super'
> >>> as currently implemented is in Python at all.
> 
> If you have a better solution for handling multiple inheritence,
> please share with us.

My concern is to at least not *directly mislead* the programmer
through a badly-named function. If 'super' can invoke a non-superclass
? if instead it gets "the next class in the MRO" ? then this is at the
least badly-named.

> FWIW, after all the articles I've read explaining why Python is
> badly designed, badly implemented, and totally flawed, I do wonder
> why this language exists at all !-)

In most of those arguments I'm firmly on the side of the Python
designers. Not on this one.

> > I don't want to break the inheritance chain. I want the
> > superclass,
> 
> A soon as you have either multiple inheritence and/or an inheritence
> tree with depth > 1, there's no such thing as "the" superclass. wrt/
> your exemple, object, A, B, C and D are *all* superclasses of E.

Yes, they are. But my example was not "get the superclass of E", but
"get the superclass of A".

The *only* ancestor of 'A' in the example is 'object', so I expect
"superclass of A" to *always* get 'object'. But that's not what
happens!

Instead, it *sometimes* gets 'object', and *sometimes* gets 'D' ?
depending on who has inherited from a class that isn't even 'A'!
That's what makes 'super' definitely misnamed, and practically
unusable.

> The next class in the MRO is (usually and AFAICT) the most direct
> superclass.

Demonstrably not, in the examples given in
<URL:http://fuhm.org/super-harmful/>.

> I wouldn't use such an extreme word as 'madness', but I totally agree
> that this should be corrected. Care to submit a doc patch ?

I don't understand what practical uses 'super' is intended for (only
that they don't seem to match any of my needs), so the only
replacement I would come up with would not be constructive.

-- 
 \       "A computer once beat me at chess, but it was no match for me |
  `\                                  at kick boxing."  -- Emo Philips |
_o__)                                                                  |
Ben Finney


From kw at codebykevin.com  Fri Sep 14 09:42:14 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Fri, 14 Sep 2007 09:42:14 -0400
Subject: Install Mac OS X - Idle doesn't show up
In-Reply-To: <mailman.530.1189773306.2658.python-list@python.org>
References: <mailman.530.1189773306.2658.python-list@python.org>
Message-ID: <46EA8FB6.4040405@codebykevin.com>

Dominique wrote:
> Hello,
> 
> Sorry bothering you with such a trivial problem.
> 
> I installed python on a new mac at office.
> It seems everything is fine: in the console, I access to python.
> But I just can't start Idle. It seems to open but closes immediately (it appears
> in the dock and closes immediately).
> It is also impossible to open any .py file.
> 
> I am sure some of you have a good idea of what to do (path,...).
> 
> Thanks in advance
> Dominique
> 
How did you install/build Python? On the Mac, you really aren't supposed 
to start it from the terminal unless you are running it under X11 or are 
using a non-framework build. If you built it the standard Mac way, or if 
you use the binary installer from python.org, Idle is installed in 
/Applications/MacPython 2.5. Look there, and you should be able to drag 
the Idle icon to the dock.

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


From xah at xahlee.org  Mon Sep 10 18:39:14 2007
From: xah at xahlee.org (Xah Lee)
Date: Mon, 10 Sep 2007 15:39:14 -0700
Subject: printing list containing unicode string
In-Reply-To: <mailman.326.1189437162.2658.python-list@python.org>
References: <1189432793.383166.156710@d55g2000hsg.googlegroups.com>
	<mailman.326.1189437162.2658.python-list@python.org>
Message-ID: <1189463954.322906.130590@r34g2000hsd.googlegroups.com>

Google groups seems to be stripping my quotation marks    lately.
Here's a retry to post my previous message.

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

Xah Lee wrote:
  
  If i have a nested list, where the atoms are unicode strings, e.g.
  # -*- coding: utf-8 -*-
  ttt=[[u"?",u"?"], [u"???"],...]
  print ttt

  how can i print it without getting the u'\u1234' notation?
  i.e. i want it print just like this: [[u"?"], ...]
  

Carsten Haese wrote:
  
  It's not quite clear why you want to do this, but this is how you
  could do it:

  print repr(ttt).decode("unicode_escape").encode("utf-8")
  

Super! Thanks a lot.

About why i want to... i think it's just simpler and easier on the
eye?

here's a example output from my program:
[[u' ', 1022], [u'?', 472], [u' ', 128], [u'?w', 300], [u'?s', 12],
[u'?|', 184],...]

wouldn't it be preferable if Python print like this by default...

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



From zzbbaadd at aol.com  Mon Sep 10 23:37:31 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Mon, 10 Sep 2007 20:37:31 -0700
Subject: Enum class with ToString functionality
In-Reply-To: <mailman.353.1189479368.2658.python-list@python.org>
References: <1189416537.050002.61120@r34g2000hsd.googlegroups.com>
	<87bqca9hrw.fsf@benfinney.id.au>
	<1189472591.797327.189180@w3g2000hsg.googlegroups.com>
	<87sl5m7xxm.fsf@benfinney.id.au>
	<1189478288.237609.25140@50g2000hsm.googlegroups.com>
	<mailman.353.1189479368.2658.python-list@python.org>
Message-ID: <1189481851.468452.198260@d55g2000hsg.googlegroups.com>

On Sep 10, 7:55 pm, "J. Cliff Dyer" <j... at sdf.lonestar.org> wrote:
> TheFlyingDutchman wrote:
> > On Sep 10, 7:12 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
> >  wrote:
> >> TheFlyingDutchman <zzbba... at aol.com> writes:
> >>>> <URL:http://cheeseshop.python.org/pypi/enum/>
> >> (Please preserve attribution lines so it's clear who wrote what.)
>
> >>> Looking at the documentation it looks excellent. But I don't
> >>> understand the 0.4.2 version number,
> >> Note the tag that says the "Development Status" is "Beta".
>
> >>> particularly when you refer to it as robust.
> >> I assume you're referring to the short description, "Robust
> >> enumerated type support in Python".
>
> >> That refers to the implemented type as robust, not the state of
> >> the code. That is, the short description should be read as
> >> "Support, in Python, for robust enumerated types". It's a
> >> description of the package functionality.
>
> >> If, of course, the state of the code is not robust, that's a bug
> >> that needs to be fixed; but that's true for any package.
>
> >> -- \     "Try to become not a man of success, but try rather to
> >> become a | `\                                   man of value."
> >> -Albert Einstein | _o__)
> >> | Ben Finney
>
> > What is the difference between this version and the 1.0 version?
>
> Uh... The 1.0 version is vaporware?
>
> Cheers,
> Cliff

I think not. 42% of it is alive and kicking as we speak.



From jeff at taupro.com  Mon Sep  3 04:41:54 2007
From: jeff at taupro.com (Jeff Rush)
Date: Mon, 03 Sep 2007 03:41:54 -0500
Subject: ShowMeDo.com Announces Winner of Most-Video-Plays of the Month
Message-ID: <46DBC8D2.1000404@taupro.com>

ShowMeDo.com, a website offering over 361 instructional screencasts about
topics both Python and non-Python, has announced their first winner of the
month for the most-played video.  And the winner is:

     "Learn Django: Create a Wiki in 20 minutes"

by Siddharta Govindaraj, founder of Silver Stripe Software, with 1851 views in
August, far outpacing the second-place entry.  The prize is a ?20 (UK) voucher
to Amazon.  Congratulations, Siddhi!  You can watch it at:

  http://showmedo.com/videos/video?name=1100000&fromSeriesID=110

Siddhi is also helping Doug Napoleone with PyCon this year, providing a
program for generating attendee badges and working to integrate it into the
Django-based conference site.

You can find Siddhi at:

    http://siddhi.blogspot.com/
    http://www.silverstripesoftware.com/

So who will win this month?  It could be you!  How about a screencast
showcasing a different web framework like TurboGears or Twisted Web?  Or
something about databases, either relational or object.

Jeff Rush
Python Advocacy Coordinator



From dtrudgett at yahoo.com  Sat Sep 15 00:54:32 2007
From: dtrudgett at yahoo.com (David Trudgett)
Date: Sat, 15 Sep 2007 14:54:32 +1000
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
Message-ID: <uir6ctto7.fsf@yahoo.com>

TheFlyingDutchman <zzbbaadd at aol.com> writes:

> The confusing way about the current Python method when you first
> encounter it is
>  why is "self" being passed in when you write the function but not
> when you call it. If the compiler is smart enough to know that
>
>     a = MyClass()
>     a.SomeFunction(12)
>
> SomeFunction() has a "self" implicitly added to the parameter list, it
> seems that it should be smart enough to know that a function defined
> in a class has a "self" implicitly added to the parameter list.

Several languages use the "object.method(args)" form, which is syntactic
sugar for "method(object, other_args)" which Ada, for instance, uses.
Knowing this clears up half the confusion (the object /is/ passed as a
parameter whichever syntax is used).

The other half of the confusion is cleared up by considering that
Python methods are ordinary functions that don't magically "know" in
which "class" context they are executing: they must be told via the
first parameter.

David Trudgett


-- 
These are not the droids you are looking for. Move along.


From shankarjee at gmail.com  Wed Sep 12 18:28:08 2007
From: shankarjee at gmail.com (Shankarjee Krishnamoorthi)
Date: Wed, 12 Sep 2007 17:28:08 -0500
Subject: File Parsing Question
In-Reply-To: <1189634861.631219.143310@57g2000hsv.googlegroups.com>
References: <mailman.455.1189630858.2658.python-list@python.org>
	<1189634861.631219.143310@57g2000hsv.googlegroups.com>
Message-ID: <ead600e10709121528r733dffedp1f807bf2c6c69c26@mail.gmail.com>

I would prefer to use something with seek. I am not able to use seek()
with "for line in inp". Use tell and seek does not seem to do anything
with the code. When I try to do

for line in inp.readlines():
    # Top of Loop
    if not condition in line:
            do_something
    else:
          for lines in inp.readlines():
              if not condition
                   do_something
              else:
                   break
                   pos = inp.tell()
   inp.seek(pos)   ---> This line has not effect in the program

Not sure if Iam missing something very basic. Also the previous line
needs to be used in the position I call # Top of Loop.

Thanks


On 9/12/07, Zentrader <zentraders at gmail.com> wrote:
> I'm assuming you know that python has a file.seek(), but you have to
> know the number of bytes you want to move from the beginning of the
> file or from the current location.  You could save the length of the
> previous record, and use file seek to backup and then move forward,
> but it is simpler to save the previous rec or use readlines() if the
> file will fit into a reasonable amount of memory.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From bbrown at speakeasy.net  Tue Sep 11 04:29:11 2007
From: bbrown at speakeasy.net (Robert Brown)
Date: Tue, 11 Sep 2007 04:29:11 -0400
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
	<1188735642.391419.103650@19g2000hsx.googlegroups.com>
	<1188740716.423349.304370@y42g2000hsy.googlegroups.com>
	<1188743299.664137.194760@d55g2000hsg.googlegroups.com>
	<46daeaec$0$19889$426a74cc@news.free.fr>
	<46DB04DD.80801@v.loewis.de>
	<46db085d$0$16113$9b4e6d93@newsspool1.arcor-online.net>
	<13dmctogeh19410@corp.supernews.com>
	<bCMCi.38254$G23.34196@newsreading01.news.tds.net>
Message-ID: <m2lkbdsizs.fsf@manolo-blahnik.bibliotech.com>

Neil Cerutti <horpner at yahoo.com> writes:

> On 2007-09-02, Steven D'Aprano
> <steve at REMOVE-THIS-cybersource.com.au> wrote:
>> A big question mark in my mind is Lisp, which according to
>> aficionados is just as dynamic as Python, but has native
>> compilers that generate code running as fast as highly
>> optimized C.

> Lisp, as far as I know, requires type declarations, discipline,
> deep knowledge of Lisp, and more than passing knowledge of your
> Lisp implementation in order to generate code that's competitive
> with C.

On my Mac Mini, the original Python code runs in 6 minutes 37 seconds using
Python 2.3.5.  The Common Lisp code below, a straightforward translation,
containing *no* type declarations, runs in 27 seconds on the same Mini using
SBCL.

When the commented out optimization declaration is included in the code, the
run time drops to 3.3 seconds.  For comparison, run times with GCC on the C
version posted earlier are 3.5 seconds unoptimized and 0.58 seconds with
optimization flag "-O3".

So for this example, deep knowledge of the Lisp implementation and type
declarations are not required to get speed equivalent to unoptimized C code.
Approaching the speed of optimized C code does require more work.

====================

(defun doit ()
;;  (declare (optimize (speed 3) (safety 0) (debug 0)))
  (let ((solutions (make-array 1001 :initial-element 0)))
    (loop for a upfrom 1 below 10000
          do (loop for b upfrom 1 below (- 1000 a)
                   do (loop for c upfrom 1 below (- 1000 a b)
                            do (let ((p (+ a b c)))
                                 (when (and (< p 1000)
                                            (= (+ (* a a) (* b b)) (* c c)))
                                   (incf (aref solutions p)))))))
    (loop with max-index = 0
          with max = 0
          for solution across solutions
          for index upfrom 0
          do (when (> solution max)
               (setf max solution)
               (setf max-index index))
          finally (print max-index))))


From ivoras at _fer.hr_  Mon Sep 17 05:49:55 2007
From: ivoras at _fer.hr_ (Ivan Voras)
Date: Mon, 17 Sep 2007 11:49:55 +0200
Subject: Python "with"
In-Reply-To: <fcleos$2rt$1@news2.u-psud.fr>
References: <fck2di$7to$1@ss408.t-com.hr> <fcleos$2rt$1@news2.u-psud.fr>
Message-ID: <fclikb$blt$1@news2.carnet.hr>

Laurent Pointal wrote:

> The ugly part is the 'tmp' name, try to choose a name with a proper 
> meaning about what it is really, and it become clean and readable:
> 
> filerefs = some.big.structure.or.nested.object.with.file.references
> filerefs.encoding = "utf-8"
> filerefs.name = "MyFileName.txt"
> filerefs.use_quotes = True
> 
> Isn't it ?

Well, no, but this might be due to personal tastes. At least, I don't 
think it's better then some other alternatives. For example, in C99 you 
can do:

static struct option_s foo_option = {
     .name = "foo",
     .type = O_STRING,
     .def_value = "default"
};

At least to me, this looks even better than the Pascal's syntax.


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From attn.steven.kuo at gmail.com  Thu Sep 13 11:10:46 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: Thu, 13 Sep 2007 08:10:46 -0700
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <1i4bnbp.1l8sr3mjdojghN%aleax@mac.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189604018.520338.162520@57g2000hsv.googlegroups.com>
	<46e7f450$0$12305$426a74cc@news.free.fr>
	<1189608231.151112.147550@y42g2000hsy.googlegroups.com>
	<mailman.444.1189611299.2658.python-list@python.org>
	<1i4bnbp.1l8sr3mjdojghN%aleax@mac.com>
Message-ID: <1189696246.195431.244960@22g2000hsm.googlegroups.com>

On Sep 12, 10:05 am, al... at mac.com (Alex Martelli) wrote:

...

> into a function and a call to it:
>
>     def f():
>         with implicit_self(t):
>             print a
>             print b
>             a = 40
>             b = a * 2
>     f()
>
> ...even with different values for the argument to _getframe.  You just
> can't "dynamically" add local variables to a function, beyond the set
> the compiler has determined are local (and those are exactly the ones
> that are *assigned to* in the function's body -- no less, no more --
> where "assigned to" includes name-binding statements such as 'def' and
> 'class' in addition to plain assignment statements, of course).
>
> Making, say, 'a' hiddenly mean 'x.a', within a function, requires a
> decorator that suitably rewrites the function's bytecode... (after
> which, it WOULD still be terrible and horrible and not to be used, just
> as you say, but it might at least _work_;-).  Main problem is, the
> decorator needs to know the set of names to be "faked out" in this
> terrible and horrible way at the time the 'def' statement executes: it
> can't wait until runtime (to dynamically determine what's in var(self))
> before it rewrites the bytecode (well, I guess you _could_ arrange a
> complicated system to do that, but it _would_ be ridiculously slow).
>
> You could try defeating the fundamental optimization that stands in your
> way by adding, say,
>     exec 'pass'
> inside the function-needing-fakeouts -- but we're getting deeper and
> deeper into the mire...;-)



What about abusing 'import' like this:

    def f():
        with implicit_self(t):
            sys.modules['__the_mire__'] = t
            from __the_mire__ import a, b
            print a
            print b
            a = 40
            b = a * 2


If the list of attributes is long then
'import' can save some typing compared to

a = self.a
b = self.b
...
z = self.z


--
Regards,
Steven



From bignose+hates-spam at benfinney.id.au  Tue Sep 18 01:38:46 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 18 Sep 2007 15:38:46 +1000
Subject: super() doesn't get superclass
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
Message-ID: <87vea8zg61.fsf@benfinney.id.au>

Evan Klitzke <evan at yelp.com> writes:

> If you're using multiple inheritance, and you're _not_ using super
> everywhere, then your code is broken anyway.

This seems to support the notion that 'super' is unusable. If I
inherit from code that isn't under my control, and then use super(),
my code is broken.

Therefore, to avoid writing broken code, I must either never inherit
from code not under my control, or I must never use super(). Since the
former is practically unavoidable, I must choose the latter.

Which, naturally, compounds the problem, since when someone else uses
*my* code, they in turn must conclude that they can't use super().

> Use super correctly in your own code, and you don't need to worry
> about other people using it incorrectly.

As the article points out, when using super(),

    you must remember that super does not call your superclass. You
    must be prepared to call any other class's method in the hierarchy
    and be prepared to be called from any other class's method.

So, the programmer using super() very much *does* need to worry about
other people using it correctly.

-- 
 \         "Quidquid latine dictum sit, altum viditur."  ("Whatever is |
  `\                   said in Latin, sounds profound.")  -- Anonymous |
_o__)                                                                  |
Ben Finney


From arvind1.singh at gmail.com  Sat Sep 29 23:48:16 2007
From: arvind1.singh at gmail.com (Arvind Singh)
Date: Sun, 30 Sep 2007 09:18:16 +0530
Subject: HOT!!!PYTHON DEVELOPER REQUIRED @ ADOBE SYSTEMS
In-Reply-To: <1190916344.841925.94900@57g2000hsv.googlegroups.com>
References: <1190916344.841925.94900@57g2000hsv.googlegroups.com>
Message-ID: <c19402930709292048v3311961ao7483a89b0e415822@mail.gmail.com>

THANKS for introducing me to Python "applets".

Applications --> Applets --> Apploids --> Applcainers --> ... -->
Approcities


Sorry, couldn't resist.


On 9/27/07, Recruiter-Adobe <rups77 at gmail.com> wrote:
>
> Hi PYTHON DEVELOPERS,
>
> ADOBE SYSTEMS is looking for a PYTHON DEVELOPER who can troubleshoot
> Python based applet which makes data base queries and populates Excel
> tables used to generate pivot charts, graphs and tables showing bug
> metrics. Isolate problem which is causing reports to crash and
> institute fix.
>
> This is a position through Manpower at our customer Adobe Systems,
> you will be employed as a Manpower's contractor.
>
> Job Responsibilities:
>
> ?         Setup a new server (development environment)
>
> ?         Install updated versions of both python and other plugins
> used for our applet.
>
> ?         Import Code/applet  instance.
>
> ?         Remove code that uploads it to the Production Server
> Instance
>
> ?         Eventually move the entire Production Instance over to the
> newer server.
>
> ?         Update Code to comply with the latest Python standards
>
> Knowledge & Skills:
>
> ?         Expert in Python Programming
>
> ?         Experience in COM Object programming speficially Excel COM
> Objects
>
> ?         Experience in using WebServices (SOAP)
>
> ?         Win2k System Administration Experience a Plus
>
> ?         Need to migrate from version 2.3 to latest version of Python
>
> Hourly Pay rate: $85-$100/hr
>
> If interested, please send a Word copy of your resumeto
> rbadame at manpowersj.com with your expected hourly rate, availability,
> visa status, best time and phone # to contact you.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Regards,
Arvind
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From stodge at gmail.com  Wed Sep 19 20:43:25 2007
From: stodge at gmail.com (Stodge)
Date: Wed, 19 Sep 2007 17:43:25 -0700
Subject: Saving parameters between Python applications?
In-Reply-To: <mailman.724.1190130636.2658.python-list@python.org>
References: <1189969538.830532.98840@g4g2000hsf.googlegroups.com>
	<fcm036$cp8$1@news2.u-psud.fr>
	<1190060967.696332.113190@n39g2000hsh.googlegroups.com>
	<1190122569.509673.41420@57g2000hsv.googlegroups.com>
	<mailman.724.1190130636.2658.python-list@python.org>
Message-ID: <1190249005.462312.281240@22g2000hsm.googlegroups.com>

I wrote a small C program in Linux and used setenv() from stdlib and
it modified the console's environment. I can also modify the console's
environment from a DOS batch file, so why not in Python?

Guess I'm inexperienced and I just don't get it. :)

On Sep 18, 11:48 am, Steve Holden <st... at holdenweb.com> wrote:
> Stodge wrote:
> > os.path.expanduser isn't an option; I need each console/window to
> > maintain different values which I wouldn't get from saving to a user's
> > home directory. Unless I used a different file for each console/window
> > but that just gets me into the same situation I'm already in. I think
> > the only option is to set environment variables using another script.
> > I'm really surprised and disapponited by this.
>
> That's a sign of your inexperience, then. As someone has already pointed
> out, this is nothing to do with Python.
>
> Under UNIX/Linux you could use the $$ variable to construct a filename
> specific to a particular shell process and put it in the environment,
> but I'm not aware of a similar feature in Windows. This is probably a
> sign of *my* inexperience :-)
>
> > One option I thought of but haven't investigated, is the ability to
> > get the parent (i.e. console's) process id and use that to create a
> > file somewhere. Not sure if this is even possible.
>
> You might be able to write a Python program to access it :-)
>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
>
> Sorry, the dog ate my .sigline




From bignose+hates-spam at benfinney.id.au  Sun Sep 16 01:05:55 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 16 Sep 2007 15:05:55 +1000
Subject: Needless copying in iterations?
References: <fchk59$mm3$1@daisy.noc.ucla.edu>
	<5l3ab6F5v20uU3@mid.uni-berlin.de>
	<13eourdrne86e61@corp.supernews.com>
Message-ID: <874phv42to.fsf@benfinney.id.au>

Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> writes:

> In *general* the compiler can't tell, but in specific cases it
> could. A (hypothetical) optimizing compiler would tell the
> difference between:
> 
> for item in alist[1:5]:
>     print item # no possible side-effects

The 'print' statement converts the 'item' to a str. That conversion
could, in a pathological case, have a side-effect (say, if the class
of 'item' had an overridden '__str__' method with side effects), and
the compiler can't know this isn't a pathological case.

> for item in alist[1:5]:
>     alist.append(item) # side-effects DON'T matter

The compiler doesn't know that, at the time of invocation,
'alist.append' doesn't have side effects that matter.

The compiler for a dynamic language like Python has very little
absolute "no significant side-effect in these specific cases"
guarantee of the kind you're assuming even in the cases you choose for
contrast with the ones that *do* have significant side-effects.

-- 
 \          "When we call others dogmatic, what we really object to is |
  `\        their holding dogmas that are different from our own."  -- |
_o__)                                                   Charles Issawi |
Ben Finney


From bj_666 at gmx.net  Fri Sep  7 07:14:03 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 7 Sep 2007 11:14:03 GMT
Subject: unexpected behavior: did i create a pointer?
References: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>
	<46e11dfe$0$4517$9b4e6d93@newsspool3.arcor-online.net>
	<pan.2007.09.07.10.40.46@REMOVE.THIS.cybersource.com.au>
Message-ID: <5kcq3rF31i6hU2@mid.uni-berlin.de>

On Fri, 07 Sep 2007 10:40:47 +0000, Steven D'Aprano wrote:

> Nor does it include "peek" and "poke" commands for reading and writing 
> into random memory locations.

I guess `ctypes` offers tools to write `peek()` and `poke()`.  :-)

Ciao,
	Marc 'BlackJack' Rintsch


From http  Sat Sep 29 04:48:40 2007
From: http (Paul Rubin)
Date: 29 Sep 2007 01:48:40 -0700
Subject: Python  and SSL
References: <1190959345.041723.108130@k79g2000hse.googlegroups.com>
	<46fd7e7b$0$18410$9b622d9e@news.freenet.de>
	<7x641u0zvl.fsf@ruckus.brouhaha.com>
	<46fdf708$0$2775$9b622d9e@news.freenet.de>
Message-ID: <7xve9tvouv.fsf@ruckus.brouhaha.com>

"Martin v. L?wis" <martin at v.loewis.de> writes:
> Please try to understand that OP's question. He got some error,
> and for some reason, he concluded that he needs to tell Python
> to trust the server certificate (most likely to make the error
> go away). I told him that he is likely wrong, and that Python already
> trusts his server certificate. I was not proposing any judgment on
> whether that's a good thing or not. In fact, I have no idea whether
> security was of any concern to the OP.

Oh, I see, I didn't interpret the question that way but it does fit
and the answer is reasonable in that situation.  


From steve at REMOVE-THIS-cybersource.com.au  Wed Sep 12 13:17:56 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Wed, 12 Sep 2007 17:17:56 -0000
Subject: Dynamically removing methods in new-style classes
References: <1189607295.676704.215210@r34g2000hsd.googlegroups.com>
Message-ID: <13eg7q4tbrksj36@corp.supernews.com>

On Wed, 12 Sep 2007 14:28:15 +0000, agupta0318 wrote:

> I am trying unsuccessfully to remove some methods from an instance,
> based on values passed in to the constructor as in the following
> example:

[snip]


>>> class C(object):
...     def method(self):
...             return "method exists"
...
>>> c = C()
>>> c.method()
'method exists'
>>> del c.__class__.method
>>> c.method()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'C' object has no attribute 'method'


Of course deleting methods from the class has the disadvantage that you 
delete them from the class. A better solution might be to mask them:


>>> class C(object):
...     def method(self):
...             return "method exists"
...     def methodgone(self, *args):
...             raise AttributeError("method gone")
...
>>> c = C()
>>> d = C()
>>> c.method = c.methodgone
>>> c.method()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 5, in methodgone
AttributeError: method gone
>>> d.method()
'method exists'


-- 
Steven.


From bignose+hates-spam at benfinney.id.au  Wed Sep 19 22:04:48 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 20 Sep 2007 12:04:48 +1000
Subject: super() doesn't get superclass
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<1i4lvsx.mhw5621jlsd53N%aleax@mac.com>
	<87r6kwzg1h.fsf@benfinney.id.au>
	<13f3j83lun4ckc5@corp.supernews.com>
Message-ID: <87tzpqw0qn.fsf@benfinney.id.au>

Scott David Daniels <Scott.Daniels at Acm.Org> writes:

> Ben Finney wrote:
> > aleax at mac.com (Alex Martelli) writes:
> >
> >> In general, "a superclass of foo" means "a class X such that foo is a
> >> sublass of X"
> >
> > Sure. However, this doesn't equate to the assertion that "next class
> > in the MRO is the superclass", which is what I was responding to.
> >
> One thing not pointed out in this thread is that the chain of classes
> on the MRO starting with super(A, obj) _will_ include all superclasses
> of A.  That is the guarantee of the MRO, and that is why super is an
> appropriate name.

Yes, it does include those classes. The problem is it also includes an
unknown (to the implementation of A) number of classes that are *not*
superclasses of A. Thus, 'super' is a *bad* name for such a function.

-- 
 \            "There are always those who think they know what is your |
  `\       responsibility better than you do."  -- Ralph Waldo Emerson |
_o__)                                                                  |
Ben Finney


From deets at nospam.web.de  Sat Sep 15 08:47:34 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 15 Sep 2007 14:47:34 +0200
Subject: python 2.5 cElementTree entity troubles
Message-ID: <5l22jsF5taqoU1@mid.uni-berlin.de>

Hi,

this snippet, adapted from

http://svn.effbot.org/public/tags/celementtree-1.0-20050126/selftest.py

fails miserably with an unknown entity exception:

from xml.etree.cElementTree import *

ENTITY_XML = """
<document>&entity;</document>
"""

parser = XMLTreeBuilder()
parser.entity["entity"] = "text"
print parser.entity

parser.feed(ENTITY_XML)
root = parser.close()


Any suggestions on how to teach the built-in ET-parser entities?

Python version is Python 2.5.1 (r251:54869, Apr 18 2007, 22:08:04)  on OSX.

Regards,

Diez


From usenet at solar-empire.de  Thu Sep 27 11:33:03 2007
From: usenet at solar-empire.de (Marc Christiansen)
Date: Thu, 27 Sep 2007 17:33:03 +0200
Subject: os.removedirs - How to force this delete?
References: <1190904657.333070.45290@n39g2000hsh.googlegroups.com>
Message-ID: <f2vss4-sdv.ln1@pluto.solar-empire.de>

cstewart913 at gmail.com wrote:
> I've been searching to find a way to force this delete to work even if
> the directory isn't empty.  I've had no luck thus far.  Anyone know
> what that would be?

Answering your immediate question: you can't force os.removedirs to
delete non-empty dirs.
But shutil.rmtree(path, ignore_errors=True) does what you want.

HTH, Marc


From cappy2112 at gmail.com  Tue Sep  4 02:00:40 2007
From: cappy2112 at gmail.com (Cappy2112)
Date: Tue, 04 Sep 2007 06:00:40 -0000
Subject: pyPortMidi
Message-ID: <1188885640.409493.147160@w3g2000hsg.googlegroups.com>


Does anyone here use pyPortMidi- in particular for Sending/receiving
sysex?



From tjreedy at udel.edu  Fri Sep 14 02:42:03 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 14 Sep 2007 02:42:03 -0400
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com><46e7974d$0$31726$426a74cc@news.free.fr><fc8fc9$4qa$1@news2.carnet.hr>
	<5kq1hgF4r90oU1@mid.individual.net><1189618530.872819.136450@57g2000hsv.googlegroups.com><1189619033.968437.286580@g4g2000hsf.googlegroups.com><5kr8vlF53m8gU3@mid.individual.net><1189643616.826715.58150@d55g2000hsg.googlegroups.com><5ksoaoF5am8cU1@mid.individual.net><1189701793.466307.93210@g4g2000hsf.googlegroups.com><5ktfjqF5ctrvU2@mid.individual.net><46e98fd8$0$27757$426a34cc@news.free.fr>
	<5ktre7F5ig0vU1@mid.individual.net>
Message-ID: <fcdafo$13e$1@sea.gmane.org>


"Bjoern Schliessmann" <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> wrote 
in message news:5ktre7F5ig0vU1 at mid.individual.net...
|> - only functions being attributes of a class...

|What, IYHO, is the difference between a method and a function?

A method is a function accessed as an attribute of a class or instance.
As an object type, it is a *runtime* function wrapper.

|> (ok, I know, you meant "functions declared within a class> statement").

| I think that those functions _are_ special ones

Thinking does not make things so.

|since the compiler is able to make "method(instance, a, b)" out of
|"instance.method(a, b)".

No it does not.  The method wrapping is done at runtine.  The compiler is 
ignorant of the wrapping that will be done.

>>> class C:
 def meth(self): pass

>>> c = C()
>>> import dis
>>> def f(): return c.meth()

>>> dis.dis(f)
  1           0 LOAD_GLOBAL              0 (c)
              3 LOAD_ATTR                1 (meth)
              6 CALL_FUNCTION            0
              9 RETURN_VALUE

The function gets wrapped as a bound method as part of LOAD_ATTR.  When the 
compiler sees <expr>(args), it does not know and does not care about the 
particular type that <expr> will become.  It just assumes that it will be 
callable and emits the code to call it.  Consider

>>> def g(): return C()

>>> dis.dis(g)
  1           0 LOAD_GLOBAL              0 (C)
              3 CALL_FUNCTION            0
              6 RETURN_VALUE

It does not notice and does not care that 'C' will be bound to a class.

Terry Jan Reedy







From bignose+hates-spam at benfinney.id.au  Tue Sep 18 01:41:30 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 18 Sep 2007 15:41:30 +1000
Subject: super() doesn't get superclass
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<1i4lvsx.mhw5621jlsd53N%aleax@mac.com>
Message-ID: <87r6kwzg1h.fsf@benfinney.id.au>

aleax at mac.com (Alex Martelli) writes:

> In general, "a superclass of foo" means "a class X such that foo is a
> sublass of X"

Sure. However, this doesn't equate to the assertion that "next class
in the MRO is the superclass", which is what I was responding to.

-- 
 \       "Even if the voices in my head are not real, they have pretty |
  `\                                           good ideas." ?anonymous |
_o__)                                                                  |
Ben Finney


From paul.nospam at rudin.co.uk  Sun Sep 16 14:25:22 2007
From: paul.nospam at rudin.co.uk (Paul Rudin)
Date: Sun, 16 Sep 2007 19:25:22 +0100
Subject: how to join array of integers?
References: <1189859762.563599.269270@g4g2000hsf.googlegroups.com>
	<a23effaf0709150551g19c611eqe1c912acf02306d3@mail.gmail.com>
	<mailman.577.1189864628.2658.python-list@python.org>
	<13eos6ihf2mjg4a@corp.supernews.com>
Message-ID: <87lkb6o4bx.fsf@rudin.co.uk>

Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> writes:

> On Sat, 15 Sep 2007 15:56:40 +0200, Arnau Sanchez wrote:
>
>> js escribi?:
>> 
>>>> On 9/15/07, Summercool <Summercoolness at gmail.com> wrote:
>> 
>>>> in Python... is the method to use  ",".join() ?  but then it must take
>>>> a list of strings... not integers...
>>>>
>>>> any fast method?
>> 
>>  > print ''.join([str(i) for i in [1,2,3]])
>> 
>> It's better to use generator comprehension instead of LC:
>> 
>> ",".join(str(i) for i in [1, 2, 3])
>
>
> Really? Why do you say that a generator expression is "better" than a 
> list comprehension?
>
>
>>>> import timeit
>>>> timeit.Timer("', '.join([str(i) for i in [1,2,3]])", "").repeat()
> [5.0969390869140625, 4.5353701114654541, 4.5807528495788574]
>>>> timeit.Timer("', '.join(str(i) for i in [1,2,3])", "").repeat()
> [11.651727914810181, 10.635221004486084, 10.522483110427856]
>
> The generator expression takes about twice as long to run, and in my 
> opinion it is no more readable. So what's the advantage?

If you do it with a decent size list they take more or less the same
time. You'd presumably expect the generator to use less memory; which
might be an advantage if you have large lists.

Isn't it odd that the generator isn't faster, since the comprehension
presumably builds a list first and then iterates over it, whereas the
generator doesn't need to make a list?


From nytrokiss at gmail.com  Sat Sep 29 23:29:38 2007
From: nytrokiss at gmail.com (James Matthews)
Date: Sat, 29 Sep 2007 20:29:38 -0700
Subject: HOT!!!PYTHON DEVELOPER REQUIRED @ ADOBE SYSTEMS
In-Reply-To: <1190916344.841925.94900@57g2000hsv.googlegroups.com>
References: <1190916344.841925.94900@57g2000hsv.googlegroups.com>
Message-ID: <8a6b8e350709292029u7944e9a7x5b6af461f4129369@mail.gmail.com>

Spam!

On 9/27/07, Recruiter-Adobe <rups77 at gmail.com> wrote:
>
> Hi PYTHON DEVELOPERS,
>
> ADOBE SYSTEMS is looking for a PYTHON DEVELOPER who can troubleshoot
> Python based applet which makes data base queries and populates Excel
> tables used to generate pivot charts, graphs and tables showing bug
> metrics. Isolate problem which is causing reports to crash and
> institute fix.
>
> This is a position through Manpower at our customer Adobe Systems,
> you will be employed as a Manpower's contractor.
>
> Job Responsibilities:
>
> ?         Setup a new server (development environment)
>
> ?         Install updated versions of both python and other plugins
> used for our applet.
>
> ?         Import Code/applet  instance.
>
> ?         Remove code that uploads it to the Production Server
> Instance
>
> ?         Eventually move the entire Production Instance over to the
> newer server.
>
> ?         Update Code to comply with the latest Python standards
>
> Knowledge & Skills:
>
> ?         Expert in Python Programming
>
> ?         Experience in COM Object programming speficially Excel COM
> Objects
>
> ?         Experience in using WebServices (SOAP)
>
> ?         Win2k System Administration Experience a Plus
>
> ?         Need to migrate from version 2.3 to latest version of Python
>
> Hourly Pay rate: $85-$100/hr
>
> If interested, please send a Word copy of your resumeto
> rbadame at manpowersj.com with your expected hourly rate, availability,
> visa status, best time and phone # to contact you.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
http://www.goldwatches.com/mens/cufflinks.html
http://www.jewelerslounge.com
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From hniksic at xemacs.org  Fri Sep 21 10:53:37 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Fri, 21 Sep 2007 16:53:37 +0200
Subject: Calling constructor but not initializer
References: <13f7kmfhe19lb7b@corp.supernews.com>
Message-ID: <87tzpocbny.fsf@mulj.homelinux.net>

Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> writes:

> I can construct an empty instance in the __new__ constructor, and I
> can initialize an non-empty instance in the __init__ initializer,
> but I can't think of any good way to stop __init__ from being called
> if the instance is empty. In pseudo-code, I want to do something
> like this:
>
> class Parrot(object):
>     def __new__(cls, data):
>         construct a new empty instance
>         if data is None:
>             return that empty instance
>         else:
>             call __init__ on the instance to populate it
>             return the non-empty instance

Suggestion 1: since you "construct a new empty instance" in both
cases, simply move the entire logic to __init__.

Suggestion 2: name your initialization method something other than
__init__ and the
calling-type-object-automatically-calls-__init__-after-__new__ simply
disappears.

Can you specify the way you'd like to instantiate the class?


From stefan.behnel-n05pAM at web.de  Thu Sep 27 13:46:08 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Thu, 27 Sep 2007 19:46:08 +0200
Subject: How do I get the value out of a DOM Element
In-Reply-To: <1190906039.259425.312640@50g2000hsm.googlegroups.com>
References: <1190872252.204687.286640@19g2000hsx.googlegroups.com>
	<46FB5B8E.8050100@web.de>
	<1190906039.259425.312640@50g2000hsm.googlegroups.com>
Message-ID: <46FBEC60.3030904@web.de>

kj7ny wrote:
> Forgot to mention I'm using Python 2.4.3.

You can install both lxml and ET on Python 2.4 (and 2.3). It's just that ET
went into the stdlib from 2.5 on.

Stefan


From bignose+hates-spam at benfinney.id.au  Sun Sep 30 21:48:02 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 01 Oct 2007 11:48:02 +1000
Subject: Using fractions instead of floats
References: <1191202509.853059.222530@k79g2000hse.googlegroups.com>
Message-ID: <87ir5rzju5.fsf@benfinney.id.au>

andresj <andres.j.new at gmail.com> writes:

> The problem arises when you try to represent some number, like 0.4 in
> a float.

Which is really a specific case of the general problem that, for any
given number base, some non-integer numbers cannot be exactly
represented as fractions.

> Secondly, what happens if I need to sum 1/3 and 0.4? I could use
> Decimal to represent 0.4 precisely, but what about 1/3?

What about the sum of ? (pi) and ?2 (sqrt(2))?

> So the solution I think is using a fraction type/class

As explained above, a fractional-number class only shifts the "exact
representation" problem, it doesn't solve it.

-- 
 \         "Facts do not cease to exist because they are ignored."  -- |
  `\                                                     Aldous Huxley |
_o__)                                                                  |
Ben Finney


From jgardner.jonathangardner.net at gmail.com  Thu Sep 13 15:57:22 2007
From: jgardner.jonathangardner.net at gmail.com (Jonathan Gardner)
Date: Thu, 13 Sep 2007 19:57:22 -0000
Subject: Python Database Apps
In-Reply-To: <xqx8x7duzrn.fsf@cola3.ca.boeing.com>
References: <1189479130.905136.196820@r34g2000hsd.googlegroups.com>
	<mailman.403.1189541226.2658.python-list@python.org>
	<xqx8x7duzrn.fsf@cola3.ca.boeing.com>
Message-ID: <1189713442.091878.41910@g4g2000hsf.googlegroups.com>

On Sep 11, 5:56 am, Harry George <harry.g.geo... at boeing.com> wrote:
> I use postgresql as well.  I wonder if Pythonistas do so out of
> concern for rigor, clarity, and scalability.  It works fine for a
> quick one-off effort and still works fine after scaling to a DBMS
> server supporting lots of clients, and running 10's of GBs of data.
>

I can only speak for myself, but I use it for the reasons you listed.
I also appreciate the concise and clear documentation, the helpfulness
of the community, and the clarity of the code. It's also pretty easy
to get back into PostgreSQL after leaving it for years. There's not
too many weird details you have to remember to get your job done.

> Of course, as long as you write DBI2 compliant code, your app doesn't
> much care which DBMS you use.  The postgresql payoff is in admin
> functionality and scaling and full ACID.
>

It's not true that DBI2 compliance meands plug-and-play. Among the
various databases, the featuresets are different, and the way certain
features are implemented is different. You need something like
SQLAlchemy on top to make it truly portable.



From arnodel at googlemail.com  Sun Sep  9 10:09:39 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 09 Sep 2007 07:09:39 -0700
Subject: unexpected behavior: did i create a pointer?
In-Reply-To: <13e7rhtqelbcb54@corp.supernews.com>
References: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>
	<46e11dfe$0$4517$9b4e6d93@newsspool3.arcor-online.net>
	<pan.2007.09.07.10.40.46@REMOVE.THIS.cybersource.com.au>
	<fbrdsm$5f3$01$1@news.t-online.com>
	<13e2jdobu2kqkf1@corp.supernews.com>
	<fbtl7i$um3$02$2@news.t-online.com>
	<13e4rno5qal6h4b@corp.supernews.com>
	<1189330200.935267.107970@19g2000hsx.googlegroups.com>
	<13e7rhtqelbcb54@corp.supernews.com>
Message-ID: <1189346979.198156.115170@g4g2000hsf.googlegroups.com>

On Sep 9, 1:59 pm, Steven D'Aprano <st... at REMOVE-THIS-
cybersource.com.au> wrote:
> On Sun, 09 Sep 2007 02:30:00 -0700, Arnaud Delobelle wrote:
> >> You know, maybe because I came to Python with no C experience, I never
> >> had trouble with the "unexpected behaviour" that so confused the
> >> original poster. It's just obvious.
>
> > The funny thing is that if the OP had thought of both 'a' and 'copyOfA'
> > as C-like pointers then he wouldn't have been confused :)
>
> You're almost certainly wrong. He would have written to ask why this
> doesn't do what he expects:
>
> >>> x = 3
> >>> y = x # x and y are both pointers to the same value
> >>> x += 1

This means that x now points to the value of x + 1, i.e. an int object
with value 4.

> >>> print x == y # of course, they are pointers to the same value

Of course not, now x points to 4 and y points to 3 !

> False
>
> Or why lower_list() works as expected, but lower_string() doesn't:
>
> >>> def lower_list(L):
>
> ...     for i, x in enumerate(L):
> ...         L[i] = x.lower()
> ...>>> s = ['STRING']
> >>> lower_list(s)
> >>> print s == ['string']
> True
>
> >>> def lower_string(s):
>
> ...     s = s.lower()
> ...>>> s = "STRING"
> >>> lower_string(s)

Let's see what happens here:  when lower_string(s) is called, the 's'
which is local to lower_string is made to point to the same object as
the global s (i.e. the string object with value "STRING").  In the
body of the function, the statement s=s.lower() makes the local 's'
point to a new string object returned s.lower().  Of course this has
not effect on what object the global 's' points to.

> >>> print s == "string"

Obviously not, since s still points to the string object with value
"STRING"

> False
>
> The "names in Python are pointers" analogy only gives you the right
> answer half the time.

They give *you* the right answer only half the time ;)

They give me the right answer all the time.  Not that I usually think
of names as pointers.  But if I choose to do so, I can still get it
right.  And if it works for me consistently, there must be some
validity in it, no?

What I think is a more dangerous misconception is to think that the
assignement operator (=) has the same meaning in C and python.

--
Arnaud



From wizzardx at gmail.com  Sat Sep  8 17:44:10 2007
From: wizzardx at gmail.com (David)
Date: Sat, 8 Sep 2007 23:44:10 +0200
Subject: Spell-checking Python source code
In-Reply-To: <46E314FD.7030200@bigfoot.com>
References: <1189285495.185657.88010@o80g2000hse.googlegroups.com>
	<46E314FD.7030200@bigfoot.com>
Message-ID: <18c1e6480709081444x69c4d23cx65f7c9b62eda8271@mail.gmail.com>

> >
> > (I know that the better practice is to isolate user-displayed strings
> > from the code, but in this case that just didn't happen.)
> >
>
> Use the re module, identify the strings and write them to another file,
> then open the file with your spell checker. Program shouldn't be more
> than 10 lines.
>
>

Have a look at the tokenize python module for the regular expressions
for extracting strings (for all possible Python string formats). On a
Debian box you can find it here: /usr/lib/python2.4/tokenize.py

It would probably be simpler to hack a copy of that script so it
writes all the strings in your source to a text file, which you then
spellcheck.

Another method would be to log all the strings your web app writes, to
a text file, then run through your entire site, and then spellcheck
your logfile.


From mridula.ccpl at gmail.com  Wed Sep 26 05:58:16 2007
From: mridula.ccpl at gmail.com (Mridula Ramesh)
Date: Wed, 26 Sep 2007 15:28:16 +0530
Subject: frame refresh or redraw for records?
Message-ID: <33dffc910709260258h4bdb24aeifa6a6b218f0aac0b@mail.gmail.com>

hi.

my actual code is a bit too long to post here, but this is how the code
works : the application loads, the first screen appears. it is to view the
records in a database, so you can scroll and view records by clicking on the
standard navigation buttons ( |<, <<, >>, >| ).

the problem is that since all my navigation code is in one class, and the
display class is called from class navigation() to make frame and the
buttons, the frame and buttons are reloaded afresh each time.  this means
that if the text fields' lengths vary, the frame messily tends to move
around to accommodate them.

1. is it wrong (ie. inefficient/ slower/ BAD pgming practice!) to reload the
frame and its children widgets every time?
2. is there a way to clear the frame of the child widgets? - this would
solve the problem of the Jumping Buttons! frame.destroy() seems to be
crashing my  whole application. is there another way?

is it possible to make a function so that every time the main values change,
a series of events is triggered?

i'm sorry, i've searched quite a bit for this frame business, and so far
it's either not worked/ been incomprehensible!

thank you for your patience -
mridula.
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From rabidpoobear at gmail.com  Sat Sep 15 00:15:59 2007
From: rabidpoobear at gmail.com (Luke Paireepinart)
Date: Fri, 14 Sep 2007 23:15:59 -0500
Subject: [Tutor] Is there some sort of Python Error log.
In-Reply-To: <eb79828c0709141650r238b6699x6a3a3dedd3d3c157@mail.gmail.com>
References: <eb79828c0709141650r238b6699x6a3a3dedd3d3c157@mail.gmail.com>
Message-ID: <46EB5C7F.2070901@gmail.com>

Lamonte Harris wrote:
> Command prompt is a pain and it would be pretty nice to have this feature.
If you're on windows, try using an IDE for your code editing.  Then the 
errors will show up in the interactive shell that the IDE runs, and you 
won't have to deal with starting a DOS command prompt to catch your errors.
-Luke


From tismer at stackless.com  Mon Sep  3 20:19:47 2007
From: tismer at stackless.com (Christian Tismer)
Date: Tue, 04 Sep 2007 02:19:47 +0200
Subject: [Crew] Four Years of Starship hosting come to an end
In-Reply-To: <46DC1042.5020906@drees.name>
References: <46DC1042.5020906@drees.name>
Message-ID: <46DCA4A3.8060404@stackless.com>

Stefan Drees wrote:
> Dear Crew of the Python Starship,
> 
> after a short email exchange of thoughts with Christian Tismer, that he 
> might take over again the hosting of the ship or silently give over some 
> of its remains to a museum, he encouraged me, to let go after four years 
> of hosting, so that I can get a grip on new stuff.

Yes, Stefan!
You hosted the ship, you payed the bills, and you got all the little
to nothing feed-backs from the Starship crew that really made
you into continuing your job. I am very fond of you. We could
go for some real task, now.

> Remember? Back in those days, when hosting providers did not offer 
> python environements but html or perl or php or sh cgi's ... Chris 
> 'Pirx' Tismer founded the Starship, by spreading the idea that 
> Pythonistas should buy planks, and he then would assemble a ship - what 
> would become "our" ship

This is almost 10 years ago, and I do remember very well.
The Starship had its role, and this was very explicitly stated
at one of the ancient PyCon events, when Guido stated that
I had not enough resources to support the Starship well enough.

Meanwhile, the world has changed quite a lot, and starship's
role might have diminished or redefined.

> I am convinced, that Chris will be interested, if there is still a need 
> for the ship and what kind of exact need there is.

Yes. If there is a wish to continue Starship, then we can do this.
I have a new server with a XEN site set up, ready for you. I also
can toss it. It is not me who needs Starship, I'm asking you.

> On October, 1st of this year 2007, whatever makes out "the ship" will 
> have been transferred to another location or just vanish into space.

I will at least take the archives, and consider how to carry
on, dependent from the community's response.

> It has been a real pleisure for me to serve this community with hosting 
> the ship!

It has been great to experience your support!

We can now try something completely different. Please let us know
your opinions.

p.s.: this is the only time I'll be cross-posting to python-list.
-- 
Christian Tismer             :^)   <mailto:tismer at stackless.com>
tismerysoft GmbH             :     Have a break! Take a ride on Python's
Johannes-Niemeyer-Weg 9A     :    *Starship* http://starship.python.net/
14109 Berlin                 :     PGP key -> http://wwwkeys.pgp.net/
work +49 30 802 86 56  mobile +49 173 24 18 776  fax +49 30 80 90 57 05
PGP 0x57F3BF04       9064 F4E1 D754 C2FF 1619  305B C09C 5A3B 57F3 BF04
       whom do you want to sponsor today?   http://www.stackless.com/


From walterbyrd at iname.com  Tue Sep 18 13:44:28 2007
From: walterbyrd at iname.com (walterbyrd)
Date: Tue, 18 Sep 2007 10:44:28 -0700
Subject: What's with "long running processes" ?
Message-ID: <1190137468.694220.126180@d55g2000hsg.googlegroups.com>

I understand that Python has them, but PHP doesn't.

I think that is because mod_php is built into apache, but mod_python
is not usually in apache. If  mod_python was built into apache, would
python still have long running processes (LRP)?

Do LRPs have to do with a Python interpreter running all the time? Or
is it something else?

I also understand that LRPs are the reason that shared hosting is less
common, and more expensive for python than php. The LRP have a major
effect on how many users can packed onto a single server.

As to LRPs: does it matter if you're using mod_python, fastcgi, wsgi,
scgi, cgi, or whatever?

Obviously, I am a little foggy about LRPs, can somebody help me out?



From steven.bethard at gmail.com  Mon Sep 24 15:09:43 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 24 Sep 2007 13:09:43 -0600
Subject: Passing parameters at the command line (New Python User)
In-Reply-To: <1190621098.582906.49760@r29g2000hsg.googlegroups.com>
References: <1190621098.582906.49760@r29g2000hsg.googlegroups.com>
Message-ID: <R-CdnT48UqzplmXbnZ2dnUVZ_hKdnZ2d@comcast.com>

cjt22 at bath.ac.uk wrote:
> Hi there. I just wondered whether anyone could recommend the correct
> way I should be passing command line parameters into my program. I am
> currently using the following code:
> 
> def main(argv = None):
> 
> 
>     file1=  "directory1"
>     file2 =  "directory2"
> 
> 
>     if argv is None:
>         args = sys.argv[1:]
> 
>     if len(args) == 0:
>         Initialise.init(0)
>         Process.processCon(file1, 0)
>         Output.print()
> 
>     for i in range(len(args)):
>         if args[i] == "-no":
>             Initialise.init(0)
>             Process.processCon(file2,1)
>             Output.print()
> 
>         if args[i] == "-not":
>            Initialise.init(1)
>             Process1.process(stepStore, firstSteps)
>             Output.print1()
> 
> 
> 
> if __name__ == "__main__":
>     main()
> 
> 
> Have I used bad syntax here so that a user can either run the program
> with commands:
> main.py
> main.py -no
> main.py -not
> 
> If I also wanted an option file to be passed in at the command line
> for 'main.py' and 'main.py -no' what would be the best way to go about
> this? I have never used Python to pass in arguments at the command
> line so any help would be much appreciated.

A solution using argparse (http://argparse.python-hosting.com/):

     import argparse

     def main(no=False, nott=False):
         file1 = "directory1"
         file2 = "directory2"

         if nott:
             print 'Initialise.init(1)'
             print 'Process1.process(stepStore, firstSteps)'
             print 'Output.print1()'
         else:
             print 'Initialise.init(0)'
             if no:
                 print 'Process.processCon(file2, 1)'
             else:
                 print 'Process.processCon(file1, 0)'
             print 'Output.print()'

     if __name__ == "__main__":
         parser = argparse.ArgumentParser()
         parser.add_argument('-no', action='store_true')
         parser.add_argument('-not', action='store_true', dest='nott')
         args = parser.parse_args()
         main(no=args.no, nott=args.nott)

Note that I've used print statements since I don't have your Initialize, 
Process, etc. objects. If I knew what "-no" and "-not" meant better, I 
could give you a better suggestion, e.g. where you parse the 0 or 1 
value for Initialize.init directly from the command line.

STeVe


From gagsl-py2 at yahoo.com.ar  Thu Sep 27 00:41:17 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 27 Sep 2007 01:41:17 -0300
Subject: scope, modyfing outside object from inside the method
References: <fd7m9s$9fe$1@news2.task.gda.pl>
	<mailman.1011.1190671351.2658.python-list@python.org>
	<fddnea$229$1@news2.task.gda.pl>
Message-ID: <op.tzapy3kgx6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 26 Sep 2007 10:39:22 -0300, Marcin St?pnicki  
<mstepnicki at gmail.com> escribi?:

> At first glance (before adding id()) it's a little bit weird. The  
> original
> object was supposedly "overwritten", but as one can see it has different
> id then the new one. mystruct still holds references to old object,
> though. I can handle it and just change original object, but I'm curious
> if there's a way to "swap" them "on-the-fly".

You should read this <http://effbot.org/zone/python-objects.htm>

-- 
Gabriel Genellina



From fabioztessitore at libero.it  Mon Sep  3 11:46:49 2007
From: fabioztessitore at libero.it (Fabio Z Tessitore)
Date: 03 Sep 2007 15:46:49 GMT
Subject: Problem with extremely small real number
References: <1188831370.133673.205230@r29g2000hsg.googlegroups.com>
Message-ID: <46dc2c69$0$10623$4fafbaef@reader2.news.tin.it>

Il Mon, 03 Sep 2007 07:56:10 -0700, Andrea ha scritto:

> [cut]
> 
> I want to call factorial(2)//binomial(1024,2) for example, in this way
> trivially I obtain 0 as probability, how can I obtain the probability
> forcing this division to output extremely small real numbers????

int to float will help

print float(factorial(2))/binomial(1024,2)

bye


From geoffness8 at gmail.com  Mon Sep 17 06:38:16 2007
From: geoffness8 at gmail.com (geoff_ness)
Date: Mon, 17 Sep 2007 10:38:16 -0000
Subject: UnicodeEncodeError in Windows
Message-ID: <1190025496.308969.51400@n39g2000hsh.googlegroups.com>

Hello - and apologies in advance for the length of this post.

I am having a hard time understanding the errors being generated by a
program I've written. The code is intended to parse text files which
are copied and pasted from web pages from an online game. The encoding
of the pages is ISO-8859-1, but the text that gets copied contains
characters from character sets other than latin-1.
For instance, one of the lines I need to be able to read is:
196679	Daimyo ? Druid	145	27	12/09/07 21:40:04	[ Expel ]

I start with the file 'citizen_list' and use this function to read it
and return a list of names (for instance, Daimyo ? Druid) and ID
numbers:

# builds the list of names from the citizens list
def getNames(f):
	"""Builds a list from the town list of names

	Returns a list"""
	newlist = []
	for line in f:
	        namewords = line.rstrip('[Expel]\n\t ')\
		.rstrip(':/0123456789 ').rstrip('\t ').rstrip('0123456789 ')\
		.rstrip('\t ').rstrip('0123456789 ').rstrip('\t ').split()
		entry = ";".join([namewords[0], "
".join(namewords[1:len(namewords)])])
		newlist.append(entry)
	return newlist

citizens = codecs.open('citizen_list', 'r', 'utf-8', 'strict')
listNames = getNames(citizens)
citizens.close()

I've specified 'utf-8' as the encoding as this seemed to be the best
candidate for picking up all the names in the list. I use the names in
other functions - for example:

def getdamage(warrior, rpt):
	"""reads each line of war report

	returns damage and number of kills for citizen name"""
        for line in rpt:
                if (line.startswith(warrior.name) or \
                    line.startswith('A blue aura surrounds ' +
warrior.name))\
                    and line.find('weapon') > 0:
                        warrior.addDamage(int(line[line.find('caused ')
+7:line.find(' damage')]))
                        if rpt.next().find('is dead') >0:
                                warrior.addKill()
                elif line.startswith(warrior.name+' is dead'):
                        warrior.dies()
                        break
                elif line.startswith('Starting round'):
                        warrior.addRound()

for cit in listNames:
        c = Warrior(cit.split(';')[0], cit.split(';')[1])
        totalnum += 1
        report = codecs.open('war_report','r', 'utf-8', 'strict')
        getdamage(c, report)
        report.close()
--[snip]--

def buildString(warrior):
        """Build a string from a warrior's stats

        Returns string for output to warStat."""
        return "!tr!!td!!id!"+str(warrior.ID)+"!/id!!/td!"+\
        "!td!"+str(warrior.damage)+"!/td!!td!"+str(warrior.kills)+\
        "!/td!!td!"+str(warrior.survived)+"!/td!!/tr!"

This code runs fine on my linux machine, but when I sent the code to a
friend with python running on windows, he got the following error:

Traceback (most recent call last):
 File "D:\Python25\Lib\SITE-P~1\PYTHON~1\pywin\framework
\scriptutils.py", line 310, in RunScript
   exec codeObject in _main_._dict_
 File "C:\Documents and Settings\Administrator\Desktop
\reparser_014(2)\parser_1.0.py", line 63, in <module>
   "".join(["%s" % buildString(c) for c in citlistS[:100]])+"!/
table!")
 File "C:\Documents and Settings\Administrator\Desktop
\reparser_014(2)\iotp_alt2.py", line 169, in buildString
   "!/td!!td!"+str(warrior.survived)+"!/td!!/tr!"
UnicodeEncodeError: 'ascii' codec can't encode character u'\ufeff' in
position 0: ordinal not in range(128)

As I understand it the error is related to the ascii codec being
unable to cope with the unicode string u'\ufeff'.
The issue I have is that this error doesn't show up for me - ascii is
the default encoding for me also. Any thoughts or assistance would be
welcomed.

Cheers



From xkenneth at gmail.com  Sat Sep  8 15:42:19 2007
From: xkenneth at gmail.com (xkenneth)
Date: Sat, 08 Sep 2007 12:42:19 -0700
Subject: Organizing Code - Packages
In-Reply-To: <46e1a0bc$0$7689$9b4e6d93@newsspool2.arcor-online.net>
References: <1189177596.960379.244990@w3g2000hsg.googlegroups.com>
	<46e17143$0$6189$426a74cc@news.free.fr>
	<1189183088.922537.18290@r34g2000hsd.googlegroups.com>
	<87r6laa0ir.fsf@rudin.co.uk>
	<46e1a0bc$0$7689$9b4e6d93@newsspool2.arcor-online.net>
Message-ID: <1189280539.449868.169910@22g2000hsm.googlegroups.com>

On Sep 7, 2:04 pm, Wildemar Wildenburger
<lasses_w... at klapptsowieso.net> wrote:
> Paul Rudin wrote:
> > xkenneth <xkenn... at gmail.com> writes:
>
> >>> Ah, yes, a couple of things:
> >>> - avoid the 'one-class-per-file' syndrom. It's perfectly ok to have tens
> >> Yes but i find it hard to edit classes easily when I have more than
> >> one class per file.
>
> > Why?
>
> Scroll-Blindness would be a good reason.
>
> It would however be completely rediculous to create a file for every
> 10-liner class you have (and I have found that Python classes tend to be
> rather short).
>
> /

Yes I agree, "Scroll-Blindness" it just gets long and confusing.
Navigating isn't so bad (emacs) here. I have another question for
something I don't quite understand.

How do import statements that are declared at the top of a python
module work?

for instance....

from MyModule.Objects import *

class Class:
      def function:
           #here i cannot access the things that should have been
imported from the above statement
           #i printed the dir() function to verify this

This happens when I'm using the Class i just defined from another
python script. I can understand if that statement at the top if not
being executed when I import the above defined class, if so, I need to
access the classes from the other modules, so where do I put the
import statement? Is it proper to put import statements inside of
class function definitions? This solves my problem but seems VERY
incorrect coming from my old C/C++ ways.

Thanks Again!

Regards,
Ken




From paul at boddie.org.uk  Thu Sep 27 04:27:58 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Thu, 27 Sep 2007 01:27:58 -0700
Subject: How do I get the value out of a DOM Element
In-Reply-To: <1190872252.204687.286640@19g2000hsx.googlegroups.com>
References: <1190872252.204687.286640@19g2000hsx.googlegroups.com>
Message-ID: <1190881678.362175.211980@g4g2000hsf.googlegroups.com>

On 27 Sep, 07:50, kj7ny <kj... at nakore.com> wrote:
> I have been able to get xml.dom.minidom.parse('somefile.xml') and then
> dom.getElementsByTagName('LLobjectID') to work to the point where I
> get something like: [<DOM Element: LLobjectID at 0x13cba08>] which I
> can get down to <DOM Element: LLobjectID at 0x13cba08> but then I
> can't find any way to just get the value out from the thing!
>
> .toxml() returns something like: u'<LLobjectID><![CDATA[1871203]]></
> LLobjectID>'.
>
> How do I just get the 1871203 out of the DOM Element?

DOM Level 3 provides the textContent property:

http://www.w3.org/TR/DOM-Level-3-Core/core.html#Node3-textContent

You'll find this in libxml2dom and possibly some other packages such
as pxdom. For the above case with minidom specifically (at least with
versions I've used), you need to iterate over the childNodes of the
element, obtaining the nodeValue for each node and joining them
together. Something like this might do it:

"".join([n.nodeValue for n in element.childNodes])

It's not pretty, but encapsulating stuff like this is what functions
are good for.

Paul



From Shawn at Milochik.com  Tue Sep 11 20:31:06 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Tue, 11 Sep 2007 20:31:06 -0400
Subject: Difference between two times (working ugly code, needs polish)
In-Reply-To: <fc73nf$gcq$1@sea.gmane.org>
References: <mailman.405.1189543618.2658.python-list@python.org>
	<13ee01cfc7f4be2@corp.supernews.com>
	<2dc0c81b0709111420r453ac15av6c7aa19473785080@mail.gmail.com>
	<fc73nf$gcq$1@sea.gmane.org>
Message-ID: <2dc0c81b0709111731t3063d10cr60127c973a2a30b4@mail.gmail.com>

>
> I suppose really oneDay should be a global (i.e. outside the function
> definition). Apart from that it would be hard to improve on: obvious,
> easy to read, in short - pythonic.
>
> Are you concerned about daylight savings? That could certainly introduce
> a whole new level of complexity into the problem. Let's hope not ...

I'm not concerned with DST; this is a script which checks my Ebay
auctions (I have some things for sale), and sends me e-mail whenever
someone bids. It's run by cron every half hour -- it keeps me from
compulsively checking my auctions. ^_^

In any case, DST isn't an issue because the same machine generates
both timestamps, and all I use it for is to stop displaying auctions
after they are 10 days old, so I don't get all my old crap filling up
the alert e-mail or skewing the total dollar amount for all active
auctions.

Thanks.
Shawn


From kyosohma at gmail.com  Tue Sep 11 09:26:04 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Tue, 11 Sep 2007 13:26:04 -0000
Subject: newbie: stani's python editor if-else
In-Reply-To: <1189484688.520933.25000@22g2000hsm.googlegroups.com>
References: <1189484688.520933.25000@22g2000hsm.googlegroups.com>
Message-ID: <1189517164.302630.307850@w3g2000hsg.googlegroups.com>

On Sep 10, 11:24 pm, madzientist <madzient... at gmail.com> wrote:
> hi,
>
> two quick questions:
>
> a) i am using SPE (latest version) and for some reason, when i type,
> say
>
> if 1==2:
>     print "not equal"
>     else:
>           print "equal"
>
> the else is at the same indentation level as the preceding print
> statement, and i get a syntax error
>
> why doesn't spe automatically put the else at the level of the if
> statement ? what am i dong wrong ? once i manually change the
> indentation, the code snippet runs perfectly.
>
> b) if this is not the group for such elementary questions, please do
> let me know.
>
> thanks !!!!
>
> suresh

I agree with Steve. I have yet to see an IDE for Python (or anything
else) that unindents statements. Even IDLE, the Official IDE for
Python, doesn't do that.

Mike



From lasses_weil at klapptsowieso.net  Sun Sep  2 15:07:13 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Sun, 02 Sep 2007 21:07:13 +0200
Subject: Glade + Python = No GUI
In-Reply-To: <1188750465.530463.271750@22g2000hsm.googlegroups.com>
References: <1188750465.530463.271750@22g2000hsm.googlegroups.com>
Message-ID: <46db09e1$0$7697$9b4e6d93@newsspool2.arcor-online.net>

Kveldulv wrote:
> When interrupted, I get
> 
> File "gui.py", line 11, in <module>
>     gtk.main()
> 
Ah, I see now. Thats just telling you that *you* interrupted the 
function/method/whateverthatis.

> When GUI coded manually, all works.
> 
Hence: Something in your (generated) code or XML file is corrupt or 
missing. Perhaps some sort of show() call or attribute. I really only 
have marginal experience with pygtk so I'm just stabbing at thin air.

sorry :(
/W


From grante at visi.com  Wed Sep 12 11:18:37 2007
From: grante at visi.com (Grant Edwards)
Date: Wed, 12 Sep 2007 15:18:37 -0000
Subject: newbie: self.member syntax seems /really/ annoying
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189604018.520338.162520@57g2000hsv.googlegroups.com>
	<46e7f450$0$12305$426a74cc@news.free.fr>
	<1189608231.151112.147550@y42g2000hsy.googlegroups.com>
	<mailman.440.1189608982.2658.python-list@python.org>
Message-ID: <13eg0qd93d90e1a@corp.supernews.com>

On 2007-09-12, Tim Golden <mail at timgolden.me.uk> wrote:

> I think it's one of those things which comes down, fairly
> enough, to: we do things this way and it works for us; other
> languages do other things and it works for them.

But not as nearly well as our way works for us, of course. ;)

-- 
Grant Edwards                   grante             Yow! I'm meditating on
                                  at               the FORMALDEHYDE and the
                               visi.com            ASBESTOS leaking into my
                                                   PERSONAL SPACE!!


From kivilaya at 163.com  Fri Sep 28 23:12:25 2007
From: kivilaya at 163.com (kivilaya)
Date: Fri, 28 Sep 2007 20:12:25 -0700
Subject: How to display a videostream in the PyQt GUI by a efficient way
Message-ID: <1191035545.816512.171410@g4g2000hsf.googlegroups.com>

Hello, everyone? : )

  I'm a beginner of pyqt, and recently I'm having a problem with it. I
hope someone could help me.

  As required, I need to get a videostream from a camera, and process
every frame to add some information on it, and then display the frame
in a PyQt GUI.
  But I don't know how to display the videostream in the PyQt GUI by a
efficient way.

Currently, I do these like this:
1. Get the videostream by the videocapture module (a useful module
written by Markus Gritsch) in the format of  PIL images;
2. Process every PIL image and add the information;
3. Convert every PIL image to QPixmap and display it using
QLabel.setPixmap.


I think it is a very inefficient way, but I don't known how to display
the videostream in other ways, so I need your help,  Thanks!

PS:I do it with Windows XP, Python 2.5.1, PyQt4.3.0



From gherzig at fmed.uba.ar  Mon Sep  3 09:28:02 2007
From: gherzig at fmed.uba.ar (Gerardo Herzig)
Date: Mon, 03 Sep 2007 10:28:02 -0300
Subject: How does super() work?
In-Reply-To: <eb79828c0708311358v388dc622qf781fe6651a7129e@mail.gmail.com>
References: <eb79828c0708311358v388dc622qf781fe6651a7129e@mail.gmail.com>
Message-ID: <46DC0BE2.5000901@fmed.uba.ar>

Lamonte Harris wrote:

>I've searched Google, and other search engines to try to find out how
>super() works.  Can someone explain in short detail how super() works?  I
>may and may not need to know this information, but it is good to know.
>
>  
>
There is at least one explanation in the python.org site, among other 
topics related to super() usage:
http://www.python.org/download/releases/2.2.3/descrintro/#cooperation

Cheers,
Gerardo


From mail at microcorp.co.za  Sat Sep  1 02:40:26 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 1 Sep 2007 08:40:26 +0200
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com><1188497498.3468.60.camel@dot.uniqsys.com><mailman.188.1188546300.28954.python-list@python.org><0v2dnaYWyv4HWkrbnZ2dnUVZ_oTinZ2d@speakeasy.net>
	<1188551958.728836.137370@x35g2000prf.googlegroups.com>
Message-ID: <005201c7ec62$fb267460$03000080@hendrik>

"Paddy" <pad....o.mail.com> wrote:
> 
> I say the 'oll' in troll like the 'ol' in frolic, and pronounce roll
> and role similarly.
> 
> My accent is probably from the East Midlands of the UK, but is not
> pronounced.

Same here - when the Troll lives under a bridge - I could not think
of something to rhyme with it - frolic is just right.

- Hendrik



From kyosohma at gmail.com  Wed Sep 26 17:04:42 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 26 Sep 2007 21:04:42 -0000
Subject: setuptools without unexpected downloads
In-Reply-To: <mailman.1111.1190813942.2658.python-list@python.org>
References: <87ejgmklep.fsf@benfinney.id.au><5lumarFae888U1@mid.uni-berlin.de>
	<1190802526.695391.326220@n39g2000hsh.googlegroups.com>
	<5lurorFa92euU1@mid.uni-berlin.de>
	<1190805012.275901.227570@57g2000hsv.googlegroups.com>
	<5luv0iFaai82U1@mid.uni-berlin.de>
	<1190808836.056298.232640@57g2000hsv.googlegroups.com>
	<fddivk$f90$1@sea.gmane.org>
	<mailman.1111.1190813942.2658.python-list@python.org>
Message-ID: <1190840682.716950.131830@r29g2000hsg.googlegroups.com>

On Sep 26, 8:30 am, Steve Holden <st... at holdenweb.com> wrote:
> Fredrik Lundh wrote:
> > Paul Boddie wrote:
>
> >> P.S. Of course, the package maintainer problem manifests itself most
> >> prominently on Windows where you often see people asking for pre-built
> >> packages or installers.
>
> > for the record, I'd love to see a group of volunteers doing stuff like
> > this for Windows.  there are plenty of volunteers that cover all major
> > Linux/*BSD distributions (tons of thanks to everyone involved in this!),
> > but as far as I can remember, nobody has ever volunteered to do the same
> > for Windows.
>
> I'd like to see something like this happen, too, and if a group of
> volunteers emerges I'll do what I can through the PSF to provide
> resources. Activities that benefit the whole community (or a large part
> of it) are, IMHO, well worth supporting.
>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
>
> Sorry, the dog ate my .sigline

What would it entail to do this? Using py2exe + some installer (like
Inno Setup) to create an installer that basically copies/installs the
files into the site-packages folder or wherever the user chooses? If
that's all it is, I would think it would be fairly easy to create
these. Maybe I'm over-simplifying it though.

What are a some examples of packages that need this?

Mike



From paddy3118 at googlemail.com  Sat Sep  1 03:17:46 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Sat, 01 Sep 2007 07:17:46 -0000
Subject: Way off topic
In-Reply-To: <mailman.253.1188628894.28954.python-list@python.org>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<1188551958.728836.137370@x35g2000prf.googlegroups.com>
	<mailman.253.1188628894.28954.python-list@python.org>
Message-ID: <1188631066.050222.69840@22g2000hsm.googlegroups.com>

On Sep 1, 7:40 am, "Hendrik van Rooyen" <m... at microcorp.co.za> wrote:
> "Paddy" <pad....o.mail.com> wrote:
>
> > I say the 'oll' in troll like the 'ol' in frolic, and pronounce roll
> > and role similarly.
>
> Same here - when the Troll lives under a bridge - I could not think
> of something to rhyme with it - frolic is just right.
>
> - Hendrik

Yep, they would have posted about it way-back if they had the tech...

http://uk.youtube.com/watch?v=zZ3fjQa5Hls

(Gershwin doesn't seem to have a line about troll though :-)

- Paddy.




From pablo at decode.com.ar  Sat Sep 29 13:55:53 2007
From: pablo at decode.com.ar (Pablo Ziliani)
Date: Sat, 29 Sep 2007 14:55:53 -0300
Subject: Program inefficiency?
In-Reply-To: <1191087234.915654.182370@k79g2000hse.googlegroups.com>
References: <1191079347.192272.240540@22g2000hsm.googlegroups.com>
	<1191087234.915654.182370@k79g2000hse.googlegroups.com>
Message-ID: <46FE91A9.1080904@decode.com.ar>

thebjorn wrote:
> On Sep 29, 5:22 pm, hall.j... at gmail.com wrote:
>   
>> I wrote the following simple program to loop through our help files
>> and fix some errors (in case you can't see the subtle RE search that's
>> happening, we're replacing spaces in bookmarks with _'s)
>> (...)
>>     
>
> Ugh, that was entirely too many regexps for my taste :-)
>
> How about something like:
>
> def attr_ndx_iter(txt, attribute):
>     (...)
> def substr_map(txt, indices, fn):
>     (...)
> def transform(s):
>     (...)
> def zap_spaces(txt, *attributes):
>     (...)
> def mass_replace():
>     (...)

Oh yeah, now it's clear as mud.
I do think that the whole program shouldn't take more than 10 lines of 
code using one sensible regex (impossible to define without knowing the 
real input and output formats).
And (sorry to tell) I'm convinced this is a problem for regexes, in 
spite of anybody's personal taste.

Pablo


From Shawn at Milochik.com  Tue Sep 11 17:20:36 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Tue, 11 Sep 2007 17:20:36 -0400
Subject: Difference between two times (working ugly code, needs polish)
In-Reply-To: <13ee01cfc7f4be2@corp.supernews.com>
References: <mailman.405.1189543618.2658.python-list@python.org>
	<13ee01cfc7f4be2@corp.supernews.com>
Message-ID: <2dc0c81b0709111420r453ac15av6c7aa19473785080@mail.gmail.com>

On 9/11/07, Grant Edwards <grante at visi.com> wrote:
> On 2007-09-11, Shawn Milochik <Shawn at Milochik.com> wrote:
>
> > I have done what I wanted, but I think there must be a much better way.
>
> See the strptime() function in either the time or the datetime
> modules:
>
> http://docs.python.org/lib/module-time.html
> http://docs.python.org/lib/module-datetime.html
>


Grant:

Thanks, this works, and is much shorter. Any further improvements, anyone?

def isOld(lastUpdate, runTimeStamp):

   oneDay = 60 * 60 * 24

   lastUpdate = time.mktime(time.strptime(lastUpdate, "%Y-%m-%d_%H:%M"))
   runTimeStamp = time.mktime(time.strptime(runTimeStamp, "%Y-%m-%d_%H:%M"))

   return (runTimeStamp - lastUpdate) / oneDay


From paddy3118 at googlemail.com  Thu Sep 13 15:38:07 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Thu, 13 Sep 2007 19:38:07 -0000
Subject: Coming from Perl
In-Reply-To: <Cv%Fi.198$372.59@read2.cgocable.net>
References: <Cv%Fi.198$372.59@read2.cgocable.net>
Message-ID: <1189712287.671352.72940@w3g2000hsg.googlegroups.com>

On Sep 13, 1:30 am, Amer Neely <perl4h... at softouch.on.ca> wrote:
> I'm a complete newbie with Python, but have several years experience
> with Perl in a web environment.
>
> A question I have, if someone here is familiar with Perl, does Python
> have something like Perl's 'here document'? I've just searched and read
> some postings on generating HTML but they all seem to refer to various
> template utilities. Is this the only way, or am I missing something? I'm
> used to generating X/HTML by hand, which makes the here document in Perl
> ideal for me. Also, many times a client already existing HTML code that
> I can use in a script.
>
> --
> Amer Neely
> w:www.webmechanic.softouch.on.ca/
> Perl | MySQL programming for all data entry forms.
> "Others make web sites. We make web sites work!"

Hi Amer,
Just as an aside, you might find this helpful:
  http://wiki.python.org/moin/PerlPhrasebook
It has perl code with python equivalents/notes.

- Paddy.



From kivilaya at 163.com  Sun Sep 30 03:10:40 2007
From: kivilaya at 163.com (kivilaya)
Date: Sun, 30 Sep 2007 00:10:40 -0700
Subject: How to display a videostream in the PyQt GUI by a efficient way
In-Reply-To: <mailman.1283.1191085590.2658.python-list@python.org>
References: <mailman.1283.1191085590.2658.python-list@python.org>
Message-ID: <1191136240.057573.254230@w3g2000hsg.googlegroups.com>

Hi, David, thank you for your help! ^__^

   I read the method in the given link and learn a lot from it. I'll
try to display the data inside a QWidget directly instead of the
current way. But I still have a question, is there any way to make the
displaying of RGB data in a QWidget more quickly.

   In fact, my work is to make a gui for displaying my
partners'experimental results to our teacher, the source video is no
need to be encoded to mpeg or h264 format, so I get the video from
camera in the raw format and display them without encodeing or
decoding process.

   As my partners will do some experiments on the raw data, maybe add
a mark to label some area in the current frame, or change some part of
it, I get every frame as a picture before they process the picture
data, and then display the picture after their process. But displaying
the pictures one by one in my current way is so slow, I'm afraid that
time spend on it is too long and the displaying of results will be
discontinuous. So I think maybe there is another way to show these
pictures.

   Look forward to more advices.^ ^

   Thanks!
Kivilaya



From michele.simionato at gmail.com  Wed Sep  5 08:56:30 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Wed, 05 Sep 2007 12:56:30 -0000
Subject: Multi Heritage with slots
In-Reply-To: <mailman.81.1188996727.2658.python-list@python.org>
References: <1188982916.071976.160170@g4g2000hsf.googlegroups.com>
	<op.tx6f02mvwepdt4@ericb.pragmadev>
	<1188994956.570845.269250@w3g2000hsg.googlegroups.com>
	<mailman.81.1188996727.2658.python-list@python.org>
Message-ID: <1188996990.810829.122910@w3g2000hsg.googlegroups.com>

On Sep 5, 2:52 pm, "Simon Brunning" <si... at brunningonline.net> wrote:
> On 9/5/07, Alexandre Badez <alexandre.ba... at gmail.com> wrote:
>
> > I use __slots__ not for memory optimization nor doing java.
> > I use __slots__ because my class are used by other lib, and in the
> > past, some of them misspell some attributes and involved a very
> > annoying comportment of the global application.
> > So the objective is only to prevent unwanted dynamism (but not in all
> > the application, just some class).
>
> Using slots to prevent the creation of new properties is what Eric
> *means* by "doing java". You're trying to write Java style code in
> Python, and it's not going to be pretty. Slots are not intended for
> this purpose, and they aren't very good for it.
>

Right, and this the way to do what the original poster wants:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/252158

                  Michele Simionato



From Michael.Coll-Barth at VerizonWireless.com  Sat Sep 29 12:07:52 2007
From: Michael.Coll-Barth at VerizonWireless.com (Michael.Coll-Barth at VerizonWireless.com)
Date: Sat, 29 Sep 2007 12:07:52 -0400
Subject: Program inefficiency?
In-Reply-To: <NYOBGCEXSMTP22SiTqg00150043@NYOBGCEXSMTP22.uswin.ad.vzwcorp.com>
References: <NYOBGCEXSMTP22SiTqg00150043@NYOBGCEXSMTP22.uswin.ad.vzwcorp.com>
Message-ID: <20070929161816.43FD71E4004@bag.python.org>

 

> -----Original Message-----
> From: hall.jeff at gmail.com
> the program works great except for one thing. It's significantly
> slower through the later files in the search then through the early
> ones... Before anyone criticizes, I recognize that that middle section
> could be simplified with a for loop... I just haven't cleaned it
> up...
> 
> The problem is that the first 300 files take about 10-15 seconds and
> the last 300 take about 2 minutes... If we do more than about 1500
> files in one run, it just hangs up and never finishes...
> 
> Is there a solution here that I'm missing? What am I doing that is so
> inefficient?

You did not mention the OS, but because you are using
"pathname\editfile.txt", it sounds like you are using an MS OS.  From
past experience with various MS OSes, I found that as the number of
files in a directory increases the slower your process runs for each
file.  You might try putting these files into multiple sub-directories.


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immediately by replying to this message and deleting it and all
copies and backups thereof.  Thank you.



From whamil1 at entergy.com  Mon Sep 10 12:24:11 2007
From: whamil1 at entergy.com (Hamilton, William )
Date: Mon, 10 Sep 2007 11:24:11 -0500
Subject: Silent SaveAs when using the Excel win32com module
In-Reply-To: <1189439861.200686.245420@k79g2000hse.googlegroups.com>
Message-ID: <588D53831C701746A2DF46E365C018CE01D2CB38@LITEXETSP001.etrsouth.corp.entergy.com>

> From: Chris
> 
> I'm trying to create an excel file which will act as a log, however I
> want to overwrite the file if it exists.
> 
> Looking at the SaveAs method I can't find anything that would allow
> it. I don't want the prompt to appear to ask whether to replace the
> file or not. I just want to replace it without thinking.
> 
> Thanks in advance.


Check if the file exists and delete it before saving the new one.
--
-Bill Hamilton


From nospam at nowhere.com  Sat Sep 29 23:17:03 2007
From: nospam at nowhere.com (DavidM)
Date: 30 Sep 2007 15:17:03 +1200
Subject: ANN: y4m - Python video editing framework
Message-ID: <46ff071f@news.orcon.net.nz>

Hi all,

Just a quick message to announce the latest release (v0.1.1) of the
'y4m' framework. www.freenet.org.nz/y4m

What is 'y4m'?

y4m is a python framework for manipulating yuv4mpeg video streams.

Young but growing rapidly.

It offers an intuitive Python API for:

 - opening yuv4mpeg streams for reading from stdin or a file (or
   auto-converting from any other video format ffmpeg can cope with)

 - opening yuv4mpeg streams for writing to stdout or a file (or
   autoconverting to any other video format ffmpeg can handle)

 - reading/changing stream and frame attributes

 - manipulating frames at any level - as rows/columns, or as pixels,
   or as Y,Cb,Cr planes

 - performing basic editing operations, such as:
    - scaling
    - cropping
    - clipping (eg taking 15 secs of a stream after the first minute)
    - flipping
    - overlaying
    - cross-fading (also known as 'dissolve')
    - transparency
    - polygon fill
    - arbitrary rotation

 - simple keyframe interpolation

It also features a plugin architecture, whereby you can overcome the
performance penalties of python by invoking fast plugins written in C. 

The plugin interface offers a simple and powerful framework to support
writing your own plugins easily, and comes with several working example
plugins).

y4m is a toolkit you can use for writing your own yuv4mpeg stdio
filters, or even building your own video editing software.

y4m is still in alpha, but works quite well on 32-bit architecture.

(I can't guarantee it on 64-bit just yet - at least not till I've pulled
out all the remaining (sizeof)int==(sizeof)(*) assumptions.  Anyone with
64-bit architecture is welcome to try it - I'd love to hear how you get
on with it.)

All feedback, suggestions, patches, bouquets, brickbats etc welcome.

Cheers
David


From mauro.tiz at gmail.com  Thu Sep 27 10:16:45 2007
From: mauro.tiz at gmail.com (mauro)
Date: Thu, 27 Sep 2007 07:16:45 -0700
Subject: Launching command on windows
In-Reply-To: <1190899078.141370.116190@57g2000hsv.googlegroups.com>
References: <1190899078.141370.116190@57g2000hsv.googlegroups.com>
Message-ID: <1190902605.700575.127180@n39g2000hsh.googlegroups.com>

On 27 Set, 15:17, Alexandre Badez <alexandre.ba... at gmail.com> wrote:
> Hy,
>
> I'm working on windows and I try to do something like:
>
> import os
> APP = os.path.abspath("C:\\Program Files\\Notepad++\\notepad++.exe")
> FILE1 = os.path.abspath("D:\\Documents and settings\\test1.py")
> FILE2 = os.path.abspath("D:\\Documents and settings\\test2.py")
> command = '"%(app)s" "%(file1)s" "%(file2)s"' % {
>     'app' : APP,
>     'file1' : FILE1,
>     'file2' : FILE2}
> # === FOR 'DEBUG' ===
> print APP
> print FILE1
> print FILE2
> print command
> print repr(command)
> # === END FOR 'DEBUG' ===
> os.system(command)
>
> This code give in output:
> C:\Program Files\Notepad++\notepad++.exe
> D:\Documents and settings\test1.py
> D:\Documents and settings\test2.py
> "C:\Program Files\Notepad++\notepad++.exe" "D:\Documents and settings
> \test1.py" "D:\Documents and settings\test2.py"
> '"C:\\Program Files\\Notepad++\\notepad++.exe" "D:\\Documents and
> settings\\test1.py" "D:\\Documents and settings\\test2.py"'
>
> 'C:\Program' n'est pas reconnu en tant que commande interne
> ou externe, un programme ex,cutable ou un fichier de commandes.
> # <= My windows is a french one
> # This error message could be translated as:
> # 'c:\Program' is not an internal nor external command, an executable
> program nor a command file
>
> But if I copy the command in the output, an paste it in a console, it
> work very well.
> Does any of you know what I can do ?
>
> PS: I think I'm oblige to add " neer every path for spaces in path,
> but if you know an other way, it could be cool :)

If you don't mind using spawnl instead of system, this should work
even with spaces:
os.spawnl(os.P_NOWAITO, command)
I hope it helps.

Mauro



From cyberco at gmail.com  Fri Sep 21 16:08:08 2007
From: cyberco at gmail.com (cyberco)
Date: Fri, 21 Sep 2007 20:08:08 -0000
Subject: uninstall python2.5 on debian
In-Reply-To: <mailman.702.1190098989.2658.python-list@python.org>
References: <mailman.702.1190098989.2658.python-list@python.org>
Message-ID: <1190405288.005864.153180@r29g2000hsg.googlegroups.com>

On Sep 18, 9:03 am, "dimitri pater" <dimitri.pa... at gmail.com> wrote:
> Hello,
> both python2.3 and python2.5 are installed on my Debian webserver. For
> some reason, I would like to uninstall Python2.5 which was installed
> from source (make install) and keep 2.3.
> I have tried make uninstall and searched the web, but that did not help me.
> I guess rm -Rf python2.5 is not a wise thing to do.
>
> thanks,
> Dimitri
>
> --
> ---
> You can't have everything. Where would you put it? -- Steven Wright
> ---
> please visitwww.serpia.org

I'm not sure if this is what you're looking for, but in /usr/bin/
there is a symbolic link named 'python' that points to a python
version in the same directory. I had the same issue and just
redirected the pointer (deleted the old one and created an new one
with the same name that pointed to the python version I wanted to use
when invoking 'python'). Having said that, the other python version is
still installed...(which was no problem at all in my case).



From BjornSteinarFjeldPettersen at gmail.com  Sat Sep 29 13:33:54 2007
From: BjornSteinarFjeldPettersen at gmail.com (thebjorn)
Date: Sat, 29 Sep 2007 10:33:54 -0700
Subject: Program inefficiency?
In-Reply-To: <1191079347.192272.240540@22g2000hsm.googlegroups.com>
References: <1191079347.192272.240540@22g2000hsm.googlegroups.com>
Message-ID: <1191087234.915654.182370@k79g2000hse.googlegroups.com>

On Sep 29, 5:22 pm, hall.j... at gmail.com wrote:
> I wrote the following simple program to loop through our help files
> and fix some errors (in case you can't see the subtle RE search that's
> happening, we're replacing spaces in bookmarks with _'s)
>
> the program works great except for one thing. It's significantly
> slower through the later files in the search then through the early
> ones... Before anyone criticizes, I recognize that that middle section
> could be simplified with a for loop... I just haven't cleaned it
> up...
>
> The problem is that the first 300 files take about 10-15 seconds and
> the last 300 take about 2 minutes... If we do more than about 1500
> files in one run, it just hangs up and never finishes...
>
> Is there a solution here that I'm missing? What am I doing that is so
> inefficient?

Ugh, that was entirely too many regexps for my taste :-)

How about something like:

def attr_ndx_iter(txt, attribute):
    "Return all the start and end indices for the values of
attribute."
    txt = txt.lower()
    attribute = attribute.lower() + '='
    alen = len(attribute)
    chunks = txt.split(attribute)
    if len(chunks) == 1:
        return

    start = len(chunks[0]) + alen
    end = -1

    for chunk in chunks[1:]:
        qchar = chunk[0]
        end = start + chunk.index(qchar, 1)
        yield start + 1, end
        start += len(chunk) + alen

def substr_map(txt, indices, fn):
    "Apply fn to text within indices."
    res = []
    cur = 0

    for i,j in indices:
        res.append(txt[cur:i])
        res.append(fn(txt[i:j]))
        cur = j

    res.append(txt[cur:])
    return ''.join(res)

def transform(s):
    "The transformation to do on the attribute values."
    return s.replace(' ', '_')

def zap_spaces(txt, *attributes):
    for attr in attributes:
        txt = substr_map(txt, attr_ndx_iter(txt, attr), transform)
    return txt

def mass_replace():
    import sys
    w = sys.stdout.write

    for f in open(r'pathname\editfile.txt'):
        try:
            open(f, 'w').write(zap_spaces(open(f).read(), 'href',
'name'))
            w('.') # progress-meter :-)
        except:
            print 'Error processing file:', f

minimally-tested'ly y'rs
-- bjorn



From lasses_weil at klapptsowieso.net  Sun Sep  2 13:29:01 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Sun, 02 Sep 2007 19:29:01 +0200
Subject: Glade + Python = No GUI
In-Reply-To: <1188750465.530463.271750@22g2000hsm.googlegroups.com>
References: <1188750465.530463.271750@22g2000hsm.googlegroups.com>
Message-ID: <46daf2de$0$4530$9b4e6d93@newsspool3.arcor-online.net>

Kveldulv wrote:
> I made simple GUI in Glade 3 (Ubuntu 7.04) consisting of only 2
> buttons. When I run
> 2buttonsgui.py, no GUI pops out
> 
> #!/usr/bin/env python
> import pygtk
> import gtk.glade
> 
> class TwoButtonsGUI:
>     def __init__(self):
>         self.window = gtk.glade.XML("/home/myusername/Desktop/
> 2buttons.glade", "window1")
> 
> if __name__ == '__main__':
>     TwoButtonsGUI()
>     gtk.main()
> 
> When interrupted, I get
> 
> File "gui.py", line 11, in <module>
>     gtk.main()
> 
> When GUI coded manually, all works.
> 
Shouldnt there be more to that error message of yours? I would expect 
something like "NameError: name 'gtk' is not defined"?

Because as it seems you haven't impored gtk (only gtk.glade). So adding 
"import gtk" at the beginning should help.

I may be wrong; I recall some weird importing requirements for pygtk, so 
I'm not sure if I'm to uninformed to see the actual problem.

/W


From mridula.ccpl at gmail.com  Tue Sep 25 06:21:24 2007
From: mridula.ccpl at gmail.com (Mridula Ramesh)
Date: Tue, 25 Sep 2007 15:51:24 +0530
Subject: buttons keep jumping, frame loads on top of itself
Message-ID: <33dffc910709250321j5695933dq84b5d8c6b76273ed@mail.gmail.com>

hi.

my actual code is a bit too long to post here, but this is how the code
works : the application loads, the first screen appears. it is to view the
records in a database, so you can scroll and view records by clicking on the
standard navigation buttons ( |<, <<, >>, >| ).

the problem is that since all my navigation code is in one class, and the
display class is called from class navigation() to make frame and the
buttons, the frame and buttons are reloaded afresh each time.  this means
that if the text fields' lengths vary, the frame messily tends to move
around to accommodate them.

1. is it wrong (ie. inefficient/ slower/ BAD pgming practice!) to reload the
frame and its children widgets every time?
2. is there a way to clear the frame of the child widgets? - this would
solve the problem of the Jumping Buttons! frame.destroy() seems to be
crashing my application.

thank you for your patience!

regards,
mridula.
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From deets at nospam.web.de  Mon Sep 24 04:47:17 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 24 Sep 2007 10:47:17 +0200
Subject: Passing parameters at the command line (New Python User)
References: <1190621098.582906.49760@r29g2000hsg.googlegroups.com>
Message-ID: <5lpbslF904p8U1@mid.uni-berlin.de>

 cjt22 at bath.ac.uk wrote:

> Hi there. I just wondered whether anyone could recommend the correct
> way I should be passing command line parameters into my program. I am
> currently using the following code:

<snip/>

Use the module optparse.

Diez


From sjmachin at lexicon.net  Mon Sep 17 08:46:39 2007
From: sjmachin at lexicon.net (John Machin)
Date: Mon, 17 Sep 2007 05:46:39 -0700
Subject: how to join array of integers?
In-Reply-To: <1190031374.566560.312510@19g2000hsx.googlegroups.com>
References: <1189859762.563599.269270@g4g2000hsf.googlegroups.com>
	<1190031374.566560.312510@19g2000hsx.googlegroups.com>
Message-ID: <1190033199.800006.288530@y42g2000hsy.googlegroups.com>

On Sep 17, 10:16 pm, "timw.google" <tjand... at yahoo.com> wrote:
> On Sep 15, 8:36 am, Summercool <Summercooln... at gmail.com> wrote:
>
> > i think in Ruby, if you have an array (or list) of integers
>
> > foo = [1, 2, 3]
>
> > you can use foo.join(",") to join them into a string "1,2,3"
>
> > in Python... is the method to use  ",".join() ?  but then it must take
> > a list of strings... not integers...
>
> > any fast method?
>
> Isn't the OP just looking for something like:
>
>
>
> >>> foo=[1,2,3]
> >>> bar=[4,5,6]
> >>> foo+bar
> [1, 2, 3, 4, 5, 6]

No. Read what he wrote. He has a SINGLE list whose elements are (e.g.)
integers [1, 2, 3], *NOT* two lists. He wants to create a STRING
"1,2,3", not a list.



From mydomdom at gmail.com  Fri Sep 14 08:43:41 2007
From: mydomdom at gmail.com (Dominique)
Date: Fri, 14 Sep 2007 12:43:41 +0000 (UTC)
Subject: Install Mac OS X - Idle doesn't show up
References: <loom.20070914T141438-201@post.gmane.org>
Message-ID: <loom.20070914T144204-511@post.gmane.org>

Dominique <mydomdom <at> gmail.com> writes:

> 
> 
One precision: When I go in the console and type idle, it works: idle appears.
But I would like to be able to launch idle from the dock
Dominique






From fw3 at hotmail.co.jp  Fri Sep  7 18:59:26 2007
From: fw3 at hotmail.co.jp (wang frank)
Date: Fri, 07 Sep 2007 22:59:26 +0000
Subject: Speed of Python
In-Reply-To: <c266a7930709071449i4ddcbd34h6d559da93076532b@mail.gmail.com>
Message-ID: <BAY122-F281710D79D61C90E54E2CCB4C50@phx.gbl>


I also have tried to use numpy to speed it up. However, surprisingly, it is 
slower than the pure python code.

Here is the code:
import  numpy 
arange=numpy.arange
nlog=numpy.log
def bench6(n):
	for i in xrange(n):
		for j in xrange(1000):
			m=j+1
			z=nlog(m)
			z1=nlog(m+1)
			z2=nlog(m+2)
			z3=nlog(m+3)
			z4=nlog(m+4)
			z5=nlog(m+5)
			z6=nlog(m+6)
			z7=nlog(m+7)
			z8=nlog(m+8)
			z9=nlog(m+9)
	return z9	

from math import log
def bench3(n):
	for i in xrange(n):
		for j in xrange(1000):
#			m=j+1
			z=log(j+1)
			z1=log(j+2)
			z2=log(j+3)
			z3=log(j+4)
			z4=log(j+5)
			z5=log(j+6)
			z6=log(j+7)
			z7=log(j+8)
			z8=log(j+9)
			z9=log(j+10)
	return z9		

Here is the result:

>>> t6=timeit.Timer("bench1.bench6(10)", "import bench1")
>>> t6.repeat(1,1)
[0.73878858905254674]
>>> t3=timeit.Timer("bench1.bench3(10)", "import bench1")
>>> t3.repeat(1,1)
[0.056632337350038142]


Anyone know why?

Thanks

Frank


>From: "Kurt Smith" <kwmsmith at gmail.com>
>To: "wang frank" <fw3 at hotmail.co.jp>
>Subject: Re: Speed of Python
>Date: Fri, 7 Sep 2007 16:49:05 -0500
>
>On 9/7/07, wang frank <fw3 at hotmail.co.jp> wrote:
> > Hi,
> > Here is the matlab code:
> > function [z]=bench1(n)
> > for i=1:n,
> >     for j=1:1000,
> >         z=log(j);
> >         z1=log(j+1);
> >         z2=log(j+2);
> >         z3=log(j+3);
> >         z4=log(j+4);
> >         z5=log(j+5);
> >         z6=log(j+6);
> >         z7=log(j+7);
> >         z8=log(j+8);
> >         z9=log(j+9);
> >     end
> > end
> > z = z9;
> >
> > I am not familiar with python, so I just simply try to reproduce the 
same
> > code in python.
> > If you think that my python script is not efficient, could you tell me 
how
> > to make it more efficient?
>
>One thing you can do is bind math.log to the function's namespace thusly:
>
>import math
>def bench1_opt(n):
>     log = math.log
>     for i in range(n):
>         for j in range(1000):
>             m=j+1
>             z=log(m)
>             z1=log(m+1)
>             z2=log(m+2)
>             z3=log(m+3)
>             z4=log(m+4)
>             z5=log(m+5)
>             z6=log(m+6)
>             z7=log(m+7)
>             z8=log(m+8)
>             z9=log(m+9)
>     return z9
>
>On my system I get about a 20% speedup over the 'unoptimized' version
>(even though this optimization is rather trivial and may even help
>readability).  Still not matlab speed, but better.  You might be able
>to do better using xrange instead of range, but the loop overhead
>isn't the main slowdown (only about 1% ).
>
>For comparisons in real-world usage (if you are doing numerical work),
>I urge you to take a look at a specifically numerical package --
>numpy/scipy or their equivalents: http://www.scipy.org/  Python is a
>*very* general language not suited for heavy numerical work out of the
>box -- dedicated numerical packages adapt python to this specialized
>envirornment, and are becoming more and more competitive with Matlab.
>The best part is you can put your time-critical code in FORTRAN or C
>and wrap it with pyrex, f2py, weave, etc. pretty easily, and still
>have the beauty of Python gluing everything together.
>
>Kurt

_________________________________________________________________
??????????????????????????????????? 
http://messenger.live.jp/ 



From steve at holdenweb.com  Mon Sep 10 21:02:20 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 10 Sep 2007 21:02:20 -0400
Subject: question on python syntax
In-Reply-To: <1189467581.200075.236120@g4g2000hsf.googlegroups.com>
References: <1189467581.200075.236120@g4g2000hsf.googlegroups.com>
Message-ID: <fc4pes$jt6$1@sea.gmane.org>

a.m. wrote:
> If I type this in shell
> 
> $ ./yourfile.py 12:34 PM &
> 
> What does '$', '.', '/' and '& means in this succession? Note: 12:34
> PM is a argument to the yourfile.py.
> 
"$" is the shell prompting you to let you know it's ready for you to 
type a command.

"./" says "look in the current directory for a file called ...".

Since the first token in the command contains a path separator ("/") the 
normal mechanism of looking for the executable in each of the 
directories in the current $PATH is not used [if you don't understand 
this sentence, ignore it].

"&" says "run this command in the background and immediately prompt for 
another command, instead of waiting for the command to finish like you 
usually do".

Technically, by the way, 12:34 PM is *two* arguments to the yourfile.py, 
not one.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Sep 12 18:47:31 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 13 Sep 2007 00:47:31 +0200
Subject: pythonesque constructs for c++
References: <fc8oc8$12vc$1@grapevine.csail.mit.edu>
Message-ID: <5kr8k3F53m8gU2@mid.individual.net>

Josh wrote:

> Does anyone know of analagous c++ libraries? It seems to me that
> most of the functionality of these modules could easily be
> replicated in c++. 

Sure, there are many. Apart from the already named, also widget
libraries often bring their own tools for this. wxWidgets and Qt
do, for instance.

Regards,


Bj?rn

-- 
BOFH excuse #15:

temporary routing anomaly



From steve at holdenweb.com  Tue Sep 18 11:51:20 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 18 Sep 2007 11:51:20 -0400
Subject: Using pseudonyms (was Re: Python 3K or Python 2.9?)
In-Reply-To: <fcop08$2ue$1@panix3.panix.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>	<46ee2d9d$0$26213$426a74cc@news.free.fr>	<fcn81q$g80$1@panix3.panix.com>	<46ef893c$0$21882$426a34cc@news.free.fr>
	<fcop08$2ue$1@panix3.panix.com>
Message-ID: <46EFF3F8.7000303@holdenweb.com>

Aahz wrote:
> In article <46ef893c$0$21882$426a34cc at news.free.fr>,
> Bruno Desthuilliers  <bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote:
>> Aahz a ?crit :
>>> In article <46ee2d9d$0$26213$426a74cc at news.free.fr>,
>>> Bruno Desthuilliers  <bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote:
>>>> But what, given that I'm an AOL user still thinking it's kewl to hide 
>>>> behind a pseudo, what else would you expect ?
>>> What exactly is a "pseudo", pray tell?
>> Sorry : a pseudonym (a nickname).
> 
> You apparently missed the thrust of my sarcasm.  You can't tell what is
> or is not a pseudonym online.  For all I know, "Bruno Desthulliers" is a
> pseudonym.  While I recognize that there is some social advantage to
> linking consistent identifiers with people, I have I think understandable
> irritation with people who insist that names follow certain patterns.
> 
> (For those joining only recently, my full legal name is "Aahz", which I
> changed from my former name precisely because of attitudes like Bruno's.)
> 
... coupled with a certain bloody-mindedness that forces you to rub 
people's noses in your ability to choose to do so? ;-)

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From istvan.albert at gmail.com  Thu Sep 20 20:48:39 2007
From: istvan.albert at gmail.com (Istvan Albert)
Date: Thu, 20 Sep 2007 17:48:39 -0700
Subject: I could use some help making this Python code run faster using
	only Python code.
In-Reply-To: <1190330015.131971.265680@y42g2000hsy.googlegroups.com>
References: <1190325588.608625.259800@q3g2000prf.googlegroups.com>
	<1190328413.226577.206740@k79g2000hse.googlegroups.com>
	<1190330015.131971.265680@y42g2000hsy.googlegroups.com>
Message-ID: <1190335719.911878.299700@k79g2000hse.googlegroups.com>

On Sep 20, 7:13 pm, "mensana... at aol.com" <mensana... at aol.com> wrote:

> How come it's not? Then I noticed you don't have brackets in
> the join statement. So I tried without them and got

If memory serves me right newer versions of python will recognize and
optimize string concatenation via the += operator, thus the advice to
use join does not apply.

i.




From http  Thu Sep 13 16:14:14 2007
From: http (Paul Rubin)
Date: 13 Sep 2007 13:14:14 -0700
Subject: An ordered dictionary for the Python library?
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<7xzlzrtrjn.fsf@ruckus.brouhaha.com>
	<1189664832.876539.86800@k79g2000hse.googlegroups.com>
Message-ID: <7xps0mmig9.fsf@ruckus.brouhaha.com>

Mark Summerfield <m.n.summerfield at googlemail.com> writes:
> > Yes.  It should use a functional data structure.
> Could you elaborate?

I mean use a data structure like an AVL tree, that can make a new dict
object quickly, whose contents are the same as the old object except
for one element (i.e. most of the contents are shared with the old
dict).  You should also have ordered versions of both lists and sets.

Consider the situation with lists:

   a = some 1000 element list
   b = a + [23]

Now a has 1000 elements and b has 1001 elements (23 followed by a's 
elements), but constructing b required copying all of a's elements.

It's sort of the same with sets:

   a = 1000 element set
   b = a + set((23,))

b had to copy the contents of a.  By using a tree structure, you can
construct b in O(log(1000)) operations so that most of the elements
are shared with a, while at the same time you don't mutate a.  That
makes it a lot easier to program in a style where you have a bunch of
slightly different versions of some set or dict flying around.  For
an example of where this came up, see this thread:

http://groups.google.com/group/comp.lang.python/browse_thread/thread/78b5953488d772e9/82f701c302122777

For sample implemetations and API's, you could look at the Hedgehog
Lisp version of AVL trees (including a Python dict-like interface):

   http://hedgehog.oliotalo.fi/

and Haskell's Data.Map library:

   http://www.haskell.org/ghc/docs/latest/html/libraries/base/Data-Map.html

I think there is something similar in the ML Basis library but I'm not
familiar with that.

For more about functional data structures, see some of Chris Okasaki's
articles:

  http://www.eecs.usma.edu/webs/people/okasaki/pubs.html

Dr. Okasaki also has written a book about the topic, called "Purely
Functional Data Structures", which is very good.

That said, in Python maybe this stuff would be easier to use
improperly because Python coding style uses mutation so much.  It
might be best to limit sharing to the case of frozen dicts and frozen
sets.


From gigs at hi.t-com.hr  Fri Sep 14 07:40:17 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Fri, 14 Sep 2007 13:40:17 +0200
Subject: recursion
In-Reply-To: <slrnfeit3k.1lg.horpner@FIAD06.norwich.edu>
References: <fcbfnj$lh4$1@ss408.t-com.hr>
	<slrnfeinvk.1cc.horpner@FIAD06.norwich.edu>
	<mailman.491.1189700115.2658.python-list@python.org>
	<slrnfeit3k.1lg.horpner@FIAD06.norwich.edu>
Message-ID: <fcdrv9$7lr$1@ss408.t-com.hr>

sorry i think that i express wrong. having problem with english


what i mean is how python knows to add all thing at the end of recursion

 >>> def f(l):
     if l == []:
         return []
     else:
         return f(l[1:]) + l[:1]


f([1,2,3])

recursion1   f([2,3]) + [1]

recursion2   f([3]) + [2]  or [2, 1]?

recursion3   f([]) + [3] or   [3, 2, 1]


i dont get all this

 >>> def f(l):
     if l == []:
	print l
         return []
     else:
         return f(l[1:]) + l[:1]

 >>> f([1,2,3])
[]
[3, 2, 1]  # how this come here? how python save  variables from each recursion?


sorry again for first post


thanks


From jstroud at mbi.ucla.edu  Fri Sep  7 00:51:40 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 06 Sep 2007 21:51:40 -0700
Subject: why should I learn python
In-Reply-To: <1189133913.480902.289070@57g2000hsv.googlegroups.com>
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
	<LC_Di.8274$924.7987@newssvr23.news.prodigy.net>
	<1189117798.506367.278560@y42g2000hsy.googlegroups.com>
	<1189118200.040934.151520@57g2000hsv.googlegroups.com>
	<1189133913.480902.289070@57g2000hsv.googlegroups.com>
Message-ID: <xN4Ei.2189$3Y1.901@newssvr17.news.prodigy.net>

BartlebyScrivener wrote:
> On Sep 6, 5:36 pm, Andr? <andre.robe... at gmail.com> wrote:
> 
>> Easy to read, easy to write, good libraries and, I have found, an
>> extremely helpful community.
>>
>> Hobbyists (like me) can work on projects written in Python on and off
>> (sometimes for weeks if not months without programming) and be able to
>> resume the work very quickly (because it's so easy to read and
>> understand the code).
>>
> 
> I second these.  I am not a programmer. You can get busy with other
> projects for weeks and come back to Python code and pick up where you
> left off, because it uses WORDS.  Try remembering what (<>) or <*>
> means after being away from Perl for a month.
> 
> rd
> 

Better is to try to remember the differences between and uses of:

   $stupidPerl[4]
   ${stupidPerl}[4]
   $stupidPerl->[4]
   ${stupidPerl}->[4]
   $#stupidPerl[4]
   $#{stupidPerl}[4]
   $#{stupidPerl}->[4]
   $#{$stupidPerl}->[4]->[4]

And so on.

Quiz: which are valid? (Careful now.)

The friggin' language is useless (except for the fact that, like 
window$, a lot of people insist on using it over superior alternatives 
and so you find yourself confronting it from time to time). In fact, it 
was the need to use nested data structures that made me move to python 
when I realized all of the above would be a thing of the past (also made 
useless my perl "cheat sheet" that sits in my big-fat-useless-camel-book).

$Perl->[Useless]

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

http://www.jamesstroud.com/


From gagsl-py2 at yahoo.com.ar  Wed Sep  5 22:35:36 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 05 Sep 2007 23:35:36 -0300
Subject: Wanted: safe codec for filenames
References: <87sl5tcrw9.fsf@wilson.homeunix.com>
	<87ps0w92ki.fsf@wilson.homeunix.com>
Message-ID: <op.tx7n5mhcx6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 05 Sep 2007 19:20:45 -0300, Torsten Bronger  
<bronger at physik.rwth-aachen.de> escribi?:

> Torsten Bronger writes:
>
>> I'd like to map general unicode strings to safe filename.  I tried
>> punycode but it is case-sensitive, which Windows is not.  Thus,
>> "Hallo" and "hallo" are mapped to "Hallo-" and "hallo-", however,
>> I need uppercase Latin letters being encoded, too, and the
>> encoding must contain only lowercase Latin letters, numbers,
>> underscores, and maybe a little bit more.  The result should be
>> more legible than base64, though.
>
> Okay, the following works fine for me:

Nice codec. Altough if one is looking for really portable file names,  
there are additional rules, collected here  
http://www.boost.org/libs/filesystem/doc/portability_guide.htm
Hard to comply with all the character set rules *and* keep all name  
lengths below the limits.

-- 
Gabriel Genellina



From erik at myemma.com  Wed Sep 19 16:02:25 2007
From: erik at myemma.com (Erik Jones)
Date: Wed, 19 Sep 2007 15:02:25 -0500
Subject: Google and Python
In-Reply-To: <1190231094.276099.136250@22g2000hsm.googlegroups.com>
References: <1190228512.627109.308910@n39g2000hsh.googlegroups.com>
	<ufadnRC5BPZm6GzbnZ2dnUVZ_jOdnZ2d@comcast.com>
	<1190231094.276099.136250@22g2000hsm.googlegroups.com>
Message-ID: <9D568821-D3E6-4702-B5C6-6BC9AA22BCD6@myemma.com>

On Sep 19, 2007, at 2:44 PM, TheFlyingDutchman wrote:

>
>> Have you tried Google "google python".  Turns up a lot of links  
>> for me.
>>
> I had done it on this newsgroup, but not google. I did find a pretty
> good link:
>
> http://panela.blog-city.com/python_at_google_greg_stein__sdforum.htm
>
> Which says:
> "A few services including code.google.com and google groups.  Most
> other front ends are in C++ (google.com) and Java (gmail).  All web
> services are built on top of a highly optimizing http server wrapped
> with SWIG."
>
> I am not clear on how you would use a language - whether C++, Java or
> Python to write the web app with this custom http server. Is this http
> server what is referred to as an "application server" or is it the
> main web server which is usually Apache at most sites?

No an http server and application server are two different things.   
An http server services requests of a web server those requests can  
be for static files or for services of a local application in which  
case the request if forwarded on to the application.  An application  
services requests of an application.  They are separate concepts,  
often chained, although they are sometimes implemented together.   
What they are saying here is that they have built a highly optimizing  
custom web server in C++ that services web requests for services of  
applications written in any of the three listed languages.  So, yes,  
in this case it is what is often Apache in other installations.

Erik Jones

Software Developer | Emma?
erik at myemma.com
800.595.4401 or 615.292.5888
615.292.0777 (fax)

Emma helps organizations everywhere communicate & market in style.
Visit us online at http://www.myemma.com




From mrkafk at gmail.com  Sun Sep 30 15:08:28 2007
From: mrkafk at gmail.com (mrkafk at gmail.com)
Date: Sun, 30 Sep 2007 12:08:28 -0700
Subject: s.split() on multiple separators
In-Reply-To: <1191176852.604761.179480@y42g2000hsy.googlegroups.com>
References: <1191160394.870241.171200@w3g2000hsg.googlegroups.com>
	<1191176852.604761.179480@y42g2000hsy.googlegroups.com>
Message-ID: <1191179308.473354.98850@n39g2000hsh.googlegroups.com>

On 30 Wrz, 20:27, William James <w_a_x_... at yahoo.com> wrote:
> On Sep 30, 8:53 am, mrk... at gmail.com wrote:

> E:\Ruby>irb
> irb(main):001:0> ' abcde abc cba fdsa bcd '.split(/[ce ]/)
> => ["", "ab", "d", "", "ab", "", "", "ba", "fdsa", "b", "d"]

That's acceptable only if you write perfect ruby-to-python
translator. ;-P

Regards,
Marcin



From steve at REMOVE-THIS-cybersource.com.au  Tue Sep  4 17:13:21 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Tue, 04 Sep 2007 21:13:21 -0000
Subject: Does shuffle() produce uniform result ?
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
	<mailman.243.1187955760.32294.python-list@python.org>
	<tooru_honda-7C82D1.10432725082007@wvnews01.netvigator.com>
	<tooru_honda-58C552.20355225082007@wvnews01.netvigator.com>
	<tooru_honda-978B9E.11304526082007@wvnews01.netvigator.com>
	<slrnfdnojg.inr.apardon@rcpc42.vub.ac.be>
	<7xejhfbsjo.fsf@ruckus.brouhaha.com>
	<slrnfdpup6.inr.apardon@rcpc42.vub.ac.be>
	<7xabs39bin.fsf@ruckus.brouhaha.com>
Message-ID: <13drijhfqlvlk96@corp.supernews.com>

On Mon, 03 Sep 2007 23:42:56 -0700, Paul Rubin wrote:

> Antoon Pardon <apardon at forel.vub.ac.be> writes:
>> > No the idea is that once there's enough entropy in the pool to make
>> > one encryption key (say 128 bits), the output of /dev/urandom is
>> > computationally indistinguishable from random output no matter how
>> > much data you read from it.
>> 
>> If you were talking about /dev/random I would agree. But this is what
>> the man page on my system says about /dev/urandom. ...
>>        the returned values are theoretically vulnerable to a
>>        cryptographic attack on the algorithms used by the driver.
> 
> Right.  The idea is that those attacks don't exist and therefore the
> output is computationally indistinguishable from random.

It is a huge leap from what the man page says, that they don't exist in 
the unclassified literature at the time the docs were written, to what 
you're saying, that they don't exist.

The man page is clear: there is a possible vulnerability in /dev/urandom. 
Any cryptographer worth his salt (pun intended) would be looking to close 
that vulnerability BEFORE an attack is made public, and not just wait for 
the attack to trickle down from the NSA to the script kiddies. The time 
to close the stable door is _before_ the horse gets away.


> Of course
> whether the idea is correct, an unproven conjecture, but it looks pretty
> good; certainly finding any problem with the specific algorithms in
> urandom would be a significant research discovery and not likely to
> affect the application being discussed.

I agree that this flaw doesn't sound like it will effect the application 
being discussed, but a problem has already been found and a solution is 
already known: block until there's enough entropy. That's what /dev/
random does.


[snip]
 
> In short, using /dev/random is fairly silly once you know there's enough
> entropy in the randomness pool to make a good key.  If /dev/urandom's
> algorithms are broken then whatever you're doing with the /dev/random
> output is probably also broken.

That doesn't follow. Antoon is specifically warning that /dev/urandom is 
non-blocking. If you knew there was enough entropy available, you 
wouldn't need /dev/random -- but how do you know there's enough entropy?

(I suppose you could look in /proc/sys/kernel/random/entropy_avail.)

For this specific application, it probably doesn't matter -- using /dev/
urandom is surely overkill, and on a single-user Linux desktop you're 
unlikely to have vast numbers of applications reading /dev/urandom 
without your knowledge. But why not use /dev/random? What's the downside?



-- 
Steven.


From ricaraoz at gmail.com  Sat Sep  8 11:08:16 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Sat, 08 Sep 2007 12:08:16 -0300
Subject: How to determine the bool between the strings and ints?
In-Reply-To: <1189193206.466633.148610@r34g2000hsd.googlegroups.com>
References: <mailman.227.1189179649.2658.python-list@python.org>	<1189182688.290480.102350@o80g2000hse.googlegroups.com>	<mailman.232.1189183755.2658.python-list@python.org>	<5kdjmcF31i6hU7@mid.uni-berlin.de>
	<1189193206.466633.148610@r34g2000hsd.googlegroups.com>
Message-ID: <46E2BAE0.7030106@bigfoot.com>

Zentrader wrote:
> On Sep 7, 11:30 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>> On Fri, 07 Sep 2007 18:49:12 +0200, Jorgen Bodde wrote:
>>> As for why caring if they are bools or not, I write True and False to
>>> the properties, the internal mechanism works like this so I need to
>>> make that distinction.
>> Really?  Can't you just apply the `int()` function?
>>
>> In [52]: map(int, [1, 0, True, False])
>> Out[52]: [1, 0, 1, 0]
>>
>> Ciao,
>>         Marc 'BlackJack' Rintsch
> 
> Blackjack's solution would take care of the problem, so this is just
> for general info.  Looks like a "feature" of isinstance() is to
> consider both True and 1 as booleans, but type() distinguishes between
> the two.
>>>> x=True
> ... if type(x) == type(1):
> ...    print "int"
> ... else:
> ...    print "not int"
> ...
> not int
> 
>  if type(x) == type(True):
> ...    print "bool"
> ...
> bool
> 

Or just :

>>> a = True
>>> type(a) == int
False
>>> type(a) == bool
True
>>> a = 'True'
>>> type(a) == bool
False
>>> type(a) == str
True
>>> a = 5
>>> type(a) == bool
False
>>> type(a) == str
False
>>> type(a) == int
True
>>> a = 4.323
>>> type(a) == int
False
>>> type(a) == float
True


From steven.klass at gmail.com  Thu Sep  6 13:26:34 2007
From: steven.klass at gmail.com (rh0dium)
Date: Thu, 06 Sep 2007 17:26:34 -0000
Subject: Help setting default class attributes
Message-ID: <1189099594.432512.278950@22g2000hsm.googlegroups.com>

Hi all,

I have the following piece of code and I wanted to set the default
attributes based on a dictionary. What I am looking for is a way to
take PIPODEFAULTS and assign each one as an attribute for the class
pipo.  Can someone show me how to do this by iterating over the
PIPODEFAULTS and assign them.  What I would expect to be able to do is
call the class and modify them.

example:
a = pipo()
print a.caseSensitivity
"preserve"

a.caseSensitivity = "lower"
print a.caseSensitivity
"lower"

Lastly - here is my code:


class pipo:

    PIPODEFAULTS={ "caseSensitivity" : "preserve","cellMapTable" :
"","checkPolygon" : "nil","compression" : "none",
                   "convertDot" : "ignore","convertPathToPoly" :
"nil","convertToGeo" : "nil","dumpPcellInfo" : "nil",
                   "snapToGrid" : "nil","techFileChoice" :
"nil","units": "micron","useParentXYforText" : "nil","viewName" :
"layout",
                  }

    def __init__(self, *args, **kwargs):
        """This simply will run a PIPO stream out
        """
        # Setup Logging
        self.pipoargs=self.setdefaults()

    def setdefaults(self):
        for x in self.PIPODEFAULTS:
            self.log.debug("Setting %s to %s" % (x,
self.PIPODEFAULTS[x]))



From deets at nospam.web.de  Wed Sep 26 06:48:59 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 26 Sep 2007 12:48:59 +0200
Subject: setuptools without unexpected downloads
References: <87ejgmklep.fsf@benfinney.id.au><878x6ukkvq.fsf@benfinney.id.au>
	<5luhb0Faal8aU1@mid.uni-berlin.de> <874phhlupi.fsf@benfinney.id.au>
	<5lumarFae888U1@mid.uni-berlin.de>
	<1190802526.695391.326220@n39g2000hsh.googlegroups.com>
Message-ID: <5lurorFa92euU1@mid.uni-berlin.de>

> If you look at PEP 345...
> 
> http://www.python.org/dev/peps/pep-0345/
> 
> ...you'll see that the dependency information described is quite close
> to how such information is represented in Debian packages and with
> other dependency management systems. This isn't an accident because
> the authors were surely already familiar with such representations,
> which have been around for quite some time. Admittedly, it isn't easy
> to make a system which observes the rules of all the different
> existing systems; for example, can .deb metadata and .rpm metadata be
> interpreted in the same way and be taken to mean the same thing?
> However, the argument that a dependency manager cannot deal with
> different system packages is a weak one: apt and Smart have shown that
> dependency management can be decoupled from package management.

Do you care to elaborate on how apt has shown that? I use it every day (or
at least often), but I have to admit I never delved to deeply into them -
to me it appears that apt is a retrieval-solution, not so much a dependency
management system. The dependencies are declared in the debs themselves,
used by dpkg-* - aren't they? Sure, apt does solve them, but how so
decoupled from the underlying .deps?

Regarding smart: what I read here

"""
Smart is not meant as an universal wrapper around different package formats.
It does support RPM, DEB and Slackware packages on a single system, but
won't permit relationships among different package managers. While
cross-packaging system dependencies could be enabled easily, the packaging
policies simply do not exist today. 
This is not at all different from what you can already do. In fact, Debian
has been shipping the RPM package manager for a few years now. "Possible"
does not equal "good idea", and everybody should stick to their native
package format. 
""" 

in the FAQ doesn't make me think that it's just a matter of unwillingness
from the setuptools-people but instead an intrinsic property of
dependency-handling that makes cross-package-management-management (or
meta-management) hard.

Apart from the technical intricacies of .deb/.rpm and their respective
tools, on thing sure makes this an argument: THEY evolve as they like, and
it sure puts a lot of additional burden to the setuptools-guys to keep
track with that.

> Of course, I've already pointed out that despite being written in
> Python, there's apparently no interest in the setuptools community to
> look at what Smart manages to do, mostly due to spurious licensing
> "concerns", and there's always the "argument zero" from people who
> choose to ignore existing dependency management solutions: that
> Windows doesn't provide such solutions - which is apparently not
> entirely true, either.
> 
> [...]
> 
>> For example - what if there is no debian package that provides module XY
>> in the required version? Do you rather install it into the global
>> site-packages, or do you rather keep it private to the program requiring
>> it? I'd say the latter is better in mostly all circumstances, as it will
>> not disrupt the workings of other programs/modules.
> 
> For what it's worth, it is possible to use Debian dependency/package
> management as a non-root user with a local site-packages directory,
> but it isn't particularly elegant. See this proof of concept for
> details:
> 
> http://www.boddie.org.uk/paul/userinstall.html
> 
> It's a fairly heavy solution which installs a lot of the
> administrative toolchain just for local package installations, but you
> do get dependency integration with the packages providing the
> libraries that may be required by various Python extension modules.

Certainly a nice solution to a real problem that might be handy for me at
some time. Yet I fail to see how that relates to the above question: if the
OS package repository fails to meet a certain version requirement, how do
you deal with that - installation local to the product you're actually
interested in installing, or in a more public way that possibly interferes
with other software?

Diez


From samy.rolka at gmail.com  Sun Sep 30 06:58:13 2007
From: samy.rolka at gmail.com (rolkA)
Date: Sun, 30 Sep 2007 10:58:13 -0000
Subject: which language allows you to change an argument's value?
In-Reply-To: <1191149233.346818.246170@22g2000hsm.googlegroups.com>
References: <1191149233.346818.246170@22g2000hsm.googlegroups.com>
Message-ID: <1191149893.586846.283530@22g2000hsm.googlegroups.com>

On 30 sep, 12:47, Summercool <Summercooln... at gmail.com> wrote:
> I wonder which language allows you to change an argument's value?
> like:
>
> foo(&a) {
>   a = 3
>
> }
>
> ...
> is there any way to prevent a function from changing the argument's
> value?
> ...
> Is there a way to prevent it from happening in the
> languages that allows it?

Hi,
Of course in C++, functions that don't modify argument's value should
(i'd rather say MUST) wait for a CONST reference or a value :

// const ref
foo(const T& a) {
  a = 3; // error

}
// value
foo(T a) {
  a = 3; // ok, but modify only the formal parameter : the argument
(aka actual parameter) is not changed

}

Now if you want to prevent a function (from a library you are using)
to modify it... Erm well, you shouldn't : a good librairy will never
wait for a non-const argument if it doesn't need to be modified. So in
this case "Is there a way to prevent it from happening" is
unpertinent : you could copy the object, but if the purpose of the
fucntion was to modify it, it's pointless.



From DouhetSukd at gmail.com  Fri Sep 14 12:10:31 2007
From: DouhetSukd at gmail.com (DouhetSukd at gmail.com)
Date: Fri, 14 Sep 2007 09:10:31 -0700
Subject: How to Start
In-Reply-To: <NikitaTheSpider-765544.19021413092007@johnf2.biosci.ohio-state.edu>
References: <MPG.215360ba6684d43b9896d5@news.cox.net>
	<NikitaTheSpider-765544.19021413092007@johnf2.biosci.ohio-state.edu>
Message-ID: <1189786231.993024.128900@k79g2000hse.googlegroups.com>

On Sep 13, 4:02 pm, Nikita the Spider <NikitaTheSpi... at gmail.com>
wrote:
> My $.02 for someone such as yourself
> is to deal with Python and as little else as possible. So write your
> code in a simple text editor like UltraEdit or Notepad

Second that opinion.  Use _your_ favorite basic text editor and run on
command line.  Don't clutter your attention with complex tools, yet,
Python's not J2EE for Pete's sake.  I started on Kedit, but mostly use
Eclipse + pydev now, with KEdit as a backup.

Do use one of the interactive interpreters (pythonwin, python prompts,
etc...) to try out one liners and short pieces of code.  But I've
never really liked them for writing full programs.

And I would just do the tutorial or Dive Into Python (http://
www.diveintopython.org/toc/index.html).  If you are as experienced as
you say, you should have very little trouble working through them,
really quickly (3-4 hours?) and you'll have a good tour of the
features.  I picked up Python on a Montreal to Vancouver flight, doing
just that.

For your problem domain.  Modules:  optparse, regular expressions.
Perhaps the "Text Processing in Python" book by Mertz.  I don't like
it much myself, but it does cover text processing in depth and it
refers to a number of existing specialized libraries.

Cheers



From deets at nospam.web.de  Fri Sep 28 15:34:43 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 28 Sep 2007 21:34:43 +0200
Subject: Python 3.0 migration plans?
References: <1191002679.569709.16870@22g2000hsm.googlegroups.com>
	<mailman.1242.1191003389.2658.python-list@python.org>
	<1191005906.556751.261940@22g2000hsm.googlegroups.com>
	<5m51l4Fbao07U2@mid.uni-berlin.de>
	<1191007754.740566.137510@n39g2000hsh.googlegroups.com>
Message-ID: <5m53aiFbfe3hU1@mid.uni-berlin.de>

TheFlyingDutchman wrote:

> 
>>
>> Or bind resources of these pocket protectors that otherwise would lead to
>> answers for people that do seek enlightment...
> 
> I don't think it would be correct to characterize my posts as not
> seeking enlightenment. I do also happen to voice my opinion which
> seems appropriate since this can be characterized as a discussion
> group. It theoretically is possible for a discussion group to tolerate
> opinions that diverge from the majority.

I would characterize

"""
I like how someone here characterized decorators - those silly @
things. They remind me of Perl. Not adding keywords for abstract and
static is like Perl not adding a keyword for class.
"""

not as seeking enlightenment, but as pure trolling. Disqualifying features
without actually understanding them as "silly" certainly doesn't lie on one
of the many path's to enlightenment known man - which to my knowledge
usually require more humble approaches....

> One issue I have with this group and that I encountered many years ago
> in the Perl group is that there is no separate group
> comp.lang.python.beginner where you can ask questions without getting
> hit with RTFM! and the like.

And I wish people that have no clue about the deeper workings of Python
wouldn't insist on commenting on these in inappropriate ways as above, but
instead try and _understand_ them before debuking them or suggesting
changes.

Diez


From laurent.pointal at limsi.fr  Tue Sep 11 08:22:39 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Tue, 11 Sep 2007 14:22:39 +0200
Subject: XML: SAX and XInclude
In-Reply-To: <46E5490F.8060107@web.de>
References: <fc3ggb$obi$1@news2.u-psud.fr> <46E5490F.8060107@web.de>
Message-ID: <fc61af$8j6$1@news2.u-psud.fr>

Stefan Behnel a ?crit :
> Laurent Pointal wrote:
>> does anybody know about an XML parser usable with the sax API (xml.sax)
>> and with XInclude feature support (directly or via hacks).
> 
> Try lxml.etree.
> 
> http://codespeak.net/lxml/
> 
> http://codespeak.net/lxml/tutorial.html
> http://codespeak.net/lxml/api.html#xinclude-and-elementinclude
> http://codespeak.net/lxml/parsing.html#iterparse-and-iterwalk
> 
> It's not half as complicated as SAX, BTW.
> 
> Stefan

I've already used ElementTree for XML tree manipulations in some 
projects... will try to adapt my sax based processing to lxml using 
those links.

Thanks,

Laurent.


From bwarren at qstreams.com  Thu Sep  6 23:02:12 2007
From: bwarren at qstreams.com (Ben Warren)
Date: Thu, 6 Sep 2007 20:02:12 -0700 (PDT)
Subject: Passing a tuple to a function as multiple arguments
Message-ID: <789865.44579.qm@web313.biz.mail.mud.yahoo.com>

Hello,

Let's say I have a function with a variable number of arguments (please ignore syntax errors):

def myfunc(a,b,c,d,...):

and I have a tuple whose contents I want to pass to the function.  The number of elements in the tuple will not always be the same.

T = A,B,C,D,...

Is there a way that I can pass the contents of the tuple to the function without explicitly indexing the elements?  Something like:

myfunc(magic(T))

where magic() expands the tuple to its multiple elements.  I've tried various for loop constructs, but everything I can think of returns a list, which doesn't work because it's viewed as one parameter.


thanks,
Ben  





From bdesth.quelquechose at free.quelquepart.fr  Sun Sep  9 11:18:03 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 09 Sep 2007 17:18:03 +0200
Subject: Compiler Python
In-Reply-To: <5kod78F3udmuU1@mid.individual.net>
References: <000001c7f4a2$307fa720$917ef560$@com>
	<mailman.404.1189543244.2658.python-list@python.org>
	<5kod78F3udmuU1@mid.individual.net>
Message-ID: <46e7045d$0$3290$426a74cc@news.free.fr>

Bjoern Schliessmann a ?crit :
> anton a wrote:
> 
>>Someone knows since as I can obtain the information detailed about
>>the compiler of Python? (Table of tokens, lists of productions of
>>the syntactic one , semantic restrictions...)
> 
> 
> I'm not really about the syntax of your question,

lol !-)

<op>
Sorry... Please don't take it as a personal offense (FWIW, my English is 
barely better than yours)
</op>


From byte8bits at gmail.com  Tue Sep 25 15:18:51 2007
From: byte8bits at gmail.com (byte8bits at gmail.com)
Date: Tue, 25 Sep 2007 19:18:51 -0000
Subject: Script to extract text from PDF files
In-Reply-To: <1190746968.162359.39890@r29g2000hsg.googlegroups.com>
References: <fdbh95$smc$1@solaris.cc.vt.edu>
	<1190746968.162359.39890@r29g2000hsg.googlegroups.com>
Message-ID: <1190747931.415834.75670@n39g2000hsh.googlegroups.com>

On Sep 25, 3:02 pm, Paul Hankin <paul.han... at gmail.com> wrote:
> Googling for 'pdf to text python' and following the first link giveshttp://pybrary.net/pyPdf/

Doesn't work that well, I've tried it, you should too... the author
even admits this:

extractText() [#]

    Locate all text drawing commands, in the order they are provided
in the content stream, and extract the text. This works well for some
PDF files, but poorly for others, depending on the generator used.
This will be refined in the future. Do not rely on the order of text
coming out of this function, as it will change if this function is
made more sophisticated. - source http://pybrary.net/pyPdf/pythondoc-pyPdf.pdf.html



From bdesth.quelquechose at free.quelquepart.fr  Fri Sep  7 12:44:18 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Fri, 07 Sep 2007 18:44:18 +0200
Subject: How to insert in a string @ a index
In-Reply-To: <1189274564.462664.131240@22g2000hsm.googlegroups.com>
References: <1189274564.462664.131240@22g2000hsm.googlegroups.com>
Message-ID: <46e4153a$0$32052$426a74cc@news.free.fr>

lolu999 at gmail.com a ?crit :
> Hi;
> 
> I'm trying to insert XYZ before a keyword in a string.

Then forget about it. Python's strings are immutable.

(snip)
> The python doesn't supports t1[keyword_index]="XYZhello" (string
> object assignment is not supported). How do I get to this problem? Any
> sugguestions?

Build a new string.



From carsten at uniqsys.com  Thu Sep 13 14:35:06 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 13 Sep 2007 14:35:06 -0400
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <1189699510.244755.85080@r34g2000hsd.googlegroups.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189604018.520338.162520@57g2000hsv.googlegroups.com>
	<mailman.486.1189693844.2658.python-list@python.org>
	<13eim00ha4lf356@corp.supernews.com>
	<1189699510.244755.85080@r34g2000hsd.googlegroups.com>
Message-ID: <1189708506.3407.7.camel@dot.uniqsys.com>

On Thu, 2007-09-13 at 09:05 -0700, Charles Fox wrote:
> when you are implementing a model from a published
> paper, the variables tend to be single greek or roman letter names,
> possibly with subscripts and superscripts, and it helps if the name
> you see on the screen is the same as the name on the paper, as is the
> case in matlab.  You want the equation on screen to look as similar to
> the one on the paper as possible, especially if its going to be read
> by another programmer who is familiar with the paper.

In that case, you could/should move the calculations into a function
that uses local variables, instead of a method that uses instance
attributes. Accessing local variables is faster than accessing instance
attributes, and you get rid of the annoying self prefix.

-- 
Carsten Haese
http://informixdb.sourceforge.net




From hniksic at xemacs.org  Tue Sep 25 15:14:16 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Tue, 25 Sep 2007 21:14:16 +0200
Subject: sorteddict PEP proposal [started off as orderedict]
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
Message-ID: <873ax2o8vr.fsf@mulj.homelinux.net>

Steven Bethard <steven.bethard at gmail.com> writes:

> With this is the implementation, I'm definitely -1. Not because it's a
> bad implementation, but because if the iteration is always doing a
> sort, then there's no reason for a separate data structure.

Agreed.  A true sorted dict would keep its keys sorted in the first
place, a la C++ std::map.


From bignose+hates-spam at benfinney.id.au  Wed Sep 26 19:41:48 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 27 Sep 2007 09:41:48 +1000
Subject: Test-driven development and code size
References: <fdai0b$7iv$1@news.lysator.liu.se>
	<5ls95aF9pq3gU1@mid.uni-berlin.de>
	<mailman.1054.1190736712.2658.python-list@python.org>
	<fdborn$h5q$1@news.lysator.liu.se>
	<87ejgmmgc2.fsf_-_@benfinney.id.au>
	<fddcnp$sn9$1@news.lysator.liu.se>
Message-ID: <87zlz9570j.fsf@benfinney.id.au>

(Joel, please preserve attribution lines on your quoted material so we
can see who wrote it.)

Joel Hedlund <joel.hedlund at gmail.com> writes:

> My presumption has been that in order to do proper test-driven
> development I would have to make enormous test suites covering all
> bases for my small hacks before I could getting down and dirty with
> coding

This presumption is entirely opposite to the truth. Test-driven
development has the following cycle:

  - Red: write one test, watch it fail

  - Green: write minimal code to satisfy all existing tests

  - Refactor: clean up implementation without changing behaviour

(The colours refer to the graphical display for some unit test
runners: red for a failing test, green for a test pass.)

This cycle is very short; it's the exact opposite to your presumption
of "write huge unit test suites before doing any coding". For me, the
cycles are on the order of a few minutes long; maybe longer if I have
to think about the interface for the next piece of code.


In more detail, the sequence (with rationale) is as follows:

  - Write *one* test only, demonstrating one simple assertion about
    the code you plan to write.

    This requires you to think about exactly what your planned code
    change (whether adding new features or fixing bugs) will do, at a
    low level, in terms of the externally-visible behaviour, *before*
    making changes to the code. The fact that it's a single yes-or-no
    assertion keeps the code change small and easily testable.

  - Run your automated unit test suite and watch your new test fail.

    This ensures that your test actually exercises the code change
    you're about to make, and that it will fail when that code isn't
    present. Thus your new test becomes a regression test as well.

  - Write the simplest thing that could possibly make the new test
    pass.

    This ensures that you write only the code absolutely necessary to
    the new test, and conversely, that *all* your code changes exist
    only to satisfy test cases. If, while making the code change, you
    think the code should also do something extra, that's not allowed
    at this point: you need a new test for that extra feature.

    Your current code change must be focussed only on satisfying the
    current test, and should do it in the way that lets you write that
    code quickly, knowing that you'll be refactoring soon.

  - Run your automated unit test suite and watch *all* tests pass.

    This ensures that your code change both meets the new test and
    doesn't regress any old ones. During this step, while any tests
    are failing, you are only allowed to fix them ? not add new
    features ? in the same vein as making the new test pass, by doing
    the simplest thing that could possibly work.

    Fixing a failing test might mean changing the code, or it might
    mean changing the test case if it's become obsoleted by changes in
    requirements.

  - Refactor the code unit to remove redundancy or other bad design.

    This ensures that, while the code unit is fresh in your mind, you
    clean it up as you proceed. Refactoring means that you change the
    implementation of the code without changing its interface; all
    existing tests, including the new one, must continue to pass. If
    you cause any test to fail while refactoring, fix the code and
    refactor again, until all tests pass.

That is: the discipline requires you to write *one* new test and watch
it fail ("Red"), then write minimal code to make *all* tests pass
("Green"), and only then refactor the code design while maintaining
the "all tests pass" state. Only then do you move on to a new code
change, starting a new cycle by writing a new test.

It ensures that the code process ratchets forward inexorably, with the
code always in a well-designed, well-factored, tested state that meets
all current low-level requirements. This also encourages frequent
commits into version control, because at the end of any cycle you've
got no loose ends.


The above effects ? short coding cycles, constant tangible forward
motion, freedom to refactor code as you work on it, freedom to commit
working code to the VCS at the end of any cycle, an ever-increasing
test suite, finding regressed tests the moment you break them instead
of spending ages looking at follow-on symptoms ? also have
significantly positive effects on the mood of the programmer.

When I started this discipline, I found to my surprise that I was just
as happy to see a failing test as I was to see all tests passing ?
because it was proof that the test worked, and gave contextual
feedback that told me exactly what part of the code unit needed to be
changed, instead of requiring an unexpected, indefinite debugging
trek.

> (as for example in http://www.diveintopython.org/unit_testing).

Yes. While that chapter is a good demonstration of how unit tests
work, the impression given by that chapter is an unfortunate
demonstration of the *wrong* way to do unit testing.

The unit test shown in that chapter was *not* written all at once, as
the chapter implies; it was rather built up over time, while
developing the code unit at the same time. I don't know whether
Pilgrim used the above cycle, but I'm positive he wrote the unit test
in small pieces while developing the code unit in correspondingly
small increments.

> But if I understand you correctly, if I would formalize what little
> testing I do, so that I can add to a growing test suite for each
> program as bugs are discovered and needs arise, would you consider
> that proper test-driven development? (or rather, is that how you do
> it?)

Yes, "test-driven development" is pretty much synonymous with the
above tight cycle of development. If you're writing large amounts of
test code before writing the corresponding code unit, that's not
test-driven development ? it's Big Design Up Front in disguise, and is
to be avoided.

For more on test-driven development, the easiest site to start with is
<URL:http://www.testdriven.com/> ? which, though much of its community
is focussed on Java, still has much to say that is relevant to any
programmer trying to adopt the practice. Its "web links" section is
also a useful starting point.

-- 
 \     "I hope that after I die, people will say of me: 'That guy sure |
  `\                         owed me a lot of money.'"  -- Jack Handey |
_o__)                                                                  |
Ben Finney


From tommy.nordgren at comhem.se  Tue Sep 18 12:49:23 2007
From: tommy.nordgren at comhem.se (Tommy Nordgren)
Date: Tue, 18 Sep 2007 18:49:23 +0200
Subject: Writing to multiple excel worksheets
In-Reply-To: <969892.43175.qm@web50103.mail.re2.yahoo.com>
References: <969892.43175.qm@web50103.mail.re2.yahoo.com>
Message-ID: <F0BABB54-FDE4-437F-B158-9F8B2D3D8432@comhem.se>


On 17 sep 2007, at 23.00, SPJ wrote:

> Hi,
>
> I have a list which I need to write to excel worksheet. The list is  
> like:
> data =  
> ['IP1','21','ftp','\n','IP1','22','ssh','\n','IP2','22','ssh','\n','IP 
> 2','23','telnet','\n']
> Now the task is to create a workbook with tabbed sheet for each of  
> the service's in the list i.e. tabs for ftp, ssh, telnet etc. The  
> data needs to be written in the corresponding sheets.
>
> What is the best way to achieve this?
> I couldn't find much help on the internet nor in the earlier  
> threads. Please help.
>
> Thanks,
> SPJ
	Excel files are in a binary and proprietary format. You can however  
generate
tab-separated text files, which Excel can import.
------
What is a woman that you forsake her, and the hearth fire and the  
home acre,
to go with the old grey Widow Maker.  --Kipling, harp song of the  
Dane women
Tommy Nordgren
tommy.nordgren at comhem.se





From george.sakkis at gmail.com  Sat Sep  1 10:28:34 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: Sat, 01 Sep 2007 14:28:34 -0000
Subject: Important Research Project
In-Reply-To: <13dhm7uec5sp855@corp.supernews.com>
References: <13ddcvm1bsu3s94@corp.supernews.com>
	<13dhm7uec5sp855@corp.supernews.com>
Message-ID: <1188656914.179330.167630@r29g2000hsg.googlegroups.com>

On Sep 1, 7:13 am, "E.D.G." <edgrs... at ix.netcom.com> wrote:
> "E.D.G." <edgrs... at ix.netcom.com> wrote in message
>
> news:13ddcvm1bsu3s94 at corp.supernews.com...
>
> > Important Research Project  (Related to computer programming)
>
> > Posted by E.D.G. on August 30, 2007 edgrs... at ix.netcom.com
>
>     This effort was not successful.

Shocking, isn't it ?

> And I am returning to trying to slowly
> make progress with the computer program I have been developing.

You might have more luck if you read http://catb.org/~esr/faqs/smart-questions.html#forum
before asking for help again.



From ldo at geek-central.gen.new_zealand  Tue Sep 25 22:15:46 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Wed, 26 Sep 2007 14:15:46 +1200
Subject: An Editor that Skips to the End of a Def
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk> <fd0au1$fro$1@lust.ihug.co.nz>
	<5lhs4pF8bkunU1@mid.individual.net> <fd4168$ige$1@lust.ihug.co.nz>
	<slrnfff9op.1is.horpner@FIAD06.norwich.edu>
	<fd9ncb$q3l$1@lust.ihug.co.nz>
	<slrnffhe9g.2db.hat@se-162.se.wtb.tue.nl>
Message-ID: <fdcfci$brq$1@lust.ihug.co.nz>

In message <slrnffhe9g.2db.hat at se-162.se.wtb.tue.nl>, A.T.Hofkamp wrote:

> On 2007-09-25, Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand>
> wrote:
>
>> Why does it "choose" to modify your position when you exit insert mode?
> 
> Try to insert 1 character in the middle of a line. You'll end up at the
> same position. Now press 'j' (one line down), then '.' (do it again).
> I believe that's why.
> 
> Great when you have nicely formatted columns of code underneath each
> other.

It's strange, but in nearly 30 years of writing code in dozens of different
languages, I've never felt the urge to line up my code in columns. Never.
(Apart from assembly language, which I suspect you don't want to hear
about.)

> The cost of that power is a command/insert mode and a steep learning
> curve.

That's another issue, that of ROI. Having learnt the vi/vim keystrokes, what
does that enable you to do? Use vi/vim, and that's it. Whereas I've found
other situations where subsets of Emacs keystrokes are recognized, such as
anything that uses GNU readline (including the Python console--see, this IS
relevant to Python after all), and pico/nano. These are all extra goodies
that are to be found on the way up the Emacs learning curve.

> For example, ever wondered why you on earth you need CTL-C and CTL-V to
> copy/paste? Why not simply select with the mouse, then right-click to
> paste?

Or better still, why not allow both?

>> And the downside is that the largest single proportion of those commands
>> end up being variations on "enter insert mode". Because most of the
>> keystrokes you enter during an editing session are in fact text to be
>> input into the file, not commands to manipulate that text. So in a modal
>> editor, having to
> 
> Depends on what you are doing. When entering new code, yes. When
> maintaining code, no (lots of small changes).

Making lots of small changes is even worse--it means you're jumping into
insert mode for shorter times, more frequently.

And that's when you discover something else: that how you delete text in
vi/vim differs, depending on whether it's something you just inserted while
currently in insert mode, or whether it was there from before you last
entered insert mode: in the former case, you use backspace to delete, in
the latter case, you can't use backspace, you have to use "X". What does
backspace do when not in insert mode? It just moves you through the text.
What does the forward-delete key do? In both modes, it actually deletes
text!

At least with Emacs, text is text--it doesn't matter when it was inserted,
it still behaves the same way.


From gagsl-py2 at yahoo.com.ar  Wed Sep 12 23:59:53 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 13 Sep 2007 00:59:53 -0300
Subject: mod_python and pysvn
References: <1189525797.361829.69380@g4g2000hsf.googlegroups.com>
	<mailman.392.1189526179.2658.python-list@python.org>
	<5ko2anF4iuuiU1@mid.individual.net>
	<1189535700.882545.253160@k79g2000hse.googlegroups.com>
Message-ID: <op.tykqp3y4x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 11 Sep 2007 15:35:00 -0300, Sjoerd <s.rappard at gmail.com> escribi?:

> The actual command:
>
> client = Client()
> repLog = client.log("\\P:\\tools\builds\publish\\")
> I used an UNC path. The forming of the repository path must be inside
> the pysvn
> library.

If that's really actual code, looks wrong. You should double all your  
backslashes or use a raw string. And \\P:... doesn't look well formed  
either.

-- 
Gabriel Genellina



From stefan.behnel-n05pAM at web.de  Fri Sep 21 01:31:35 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Fri, 21 Sep 2007 07:31:35 +0200
Subject: newb: BeautifulSoup
In-Reply-To: <1190348543.472684.243840@50g2000hsm.googlegroups.com>
References: <1190343890.375836.78630@r29g2000hsg.googlegroups.com>
	<1190348543.472684.243840@50g2000hsm.googlegroups.com>
Message-ID: <46F35737.5090608@web.de>

TheFlyingDutchman wrote:
> On Sep 20, 8:04 pm, crybaby <joemystery... at gmail.com> wrote:
>> I need to traverse a html page with big table that has many row and
>> columns.  For example, how to go 35th td tag and do regex to retireve
>> the content.  After that is done, you move down to 15th td tag from
>> 35th tag (35+15) and do regex to retrieve the content?
> 
> Make the file an xhtml file (valid xml) if it isn't already and then
> you can use software written to process XML files:
> 
> http://pyxml.sourceforge.net/topics/

... or just use software that can process XML and HTML the same way *and* that
supports XPath and tree iteration so that you can easily select the content
you want.

http://codespeak.net/lxml/

Stefan


From bdesth.quelquechose at free.quelquepart.fr  Mon Sep  3 11:24:30 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 03 Sep 2007 17:24:30 +0200
Subject: function call
In-Reply-To: <mailman.45.1188939395.2658.python-list@python.org>
References: <1188937059.459609.61850@57g2000hsv.googlegroups.com>	<46ddc12c$0$24997$426a74cc@news.free.fr>
	<mailman.45.1188939395.2658.python-list@python.org>
Message-ID: <46ddc866$0$25003$426a34cc@news.free.fr>

Chris Mellon a ?crit :
> On 9/3/07, Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> wrote:
> 
>>ianar? a ?crit :
>>
>>>Hey all,
>>>
>>>Is there a way of printing out how a function was called? In other
>>>words if I do the following:
>>>
>>>def someFunction(self):
>>>    self.someOtherFunction(var1, var2)
>>>
>>>
>>>I would get something like "someOtherFunction: called by:
>>>someFunction, args are: var1, var2"
>>>
>>>Thanks in advance
>>>
>>
>>You may be able to solve this using a decorator (to avoid polluting your
>>code with this) and the infamous sys._getframe() hack.
>>--
> 
> 
> Every reasonable use case for this (and several unreasonable ones)
> that I've encountered (and some that I've just imagined) can be better
> addressed with a trace function (sys.set_trace) than by trying to do
> this at the point of call.

Indeed. Thanks for the correction.

<op>
relevant doc here:
http://docs.python.org/lib/debugger-hooks.html
</op>


From furkankuru at gmail.com  Sun Sep  2 16:16:22 2007
From: furkankuru at gmail.com (Furkan KURU)
Date: Sun, 2 Sep 2007 23:16:22 +0300
Subject: how can I find out the process ids with a process name
In-Reply-To: <1188761187.522146.192380@y42g2000hsy.googlegroups.com>
References: <1188761187.522146.192380@y42g2000hsy.googlegroups.com>
Message-ID: <3a4a8f930709021316p4a6ccfd7r8e2db9d85cad7f5a@mail.gmail.com>

the easiest but slowest way:

you can send output to a file

ps -ef |grep emacs > output_file

and then read the file content

(I believe there is a much better way)




On 9/2/07, herman <Herman.Schultz at gmail.com> wrote:
> Hi,
>
> I would like to find out all the process id with the process name
> 'emacs'.
>
> In the shell, i can do this:
>
> $ ps -ef |grep emacs
> root     20731  8690  0 12:37 pts/2    00:00:09 emacs-snapshot-gtk
> root  25649 25357  0 13:55 pts/9    00:00:05 emacs-snapshot-gtk rtp.c
> root  26319 23926  0 14:06 pts/7    00:00:04 emacs-snapshot-gtk
> stressTestVideo.py
> root  26985     1  0 14:15 ?        00:00:01 /usr/bin/emacs-snapshot-
> gtk
> root     27472 21066  0 14:23 pts/5    00:00:00 grep emacs
>
>
> and I can see the process id is 20731, 25649, etc, etc.
>
> But now I would like to do the programmically in my python script.
> I know I can use ' os.system(cmd)' to execute the command 'ps -ef |
> grep emacs', but how
> can I pipe the output of my 'ps -ef | grep emacs' to my python script
> and then run a regression expression with it to get the process Ids?
>
> Thank you.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
Furkan Kuru


From ldo at geek-central.gen.new_zealand  Wed Sep 26 03:05:18 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Wed, 26 Sep 2007 19:05:18 +1200
Subject: stopping a while True: with the keyboard
References: <mailman.1071.1190769576.2658.python-list@python.org>
Message-ID: <fdd0be$l95$2@lust.ihug.co.nz>

In message <mailman.1071.1190769576.2658.python-list at python.org>, patrick
wrote:

> i am looking for a way to break a while True: when pressing "s" on my
> keyboard. how can i do this?

<http://groups.google.co.nz/groups?selm=fba8bo$331$1 at lust.ihug.co.nz>


From fw3 at hotmail.co.jp  Fri Sep  7 16:25:41 2007
From: fw3 at hotmail.co.jp (wang frank)
Date: Fri, 07 Sep 2007 20:25:41 +0000
Subject: Speed of Python
In-Reply-To: <1189193265.845514.190500@y42g2000hsy.googlegroups.com>
Message-ID: <BAY122-F29D58146F3C87C73480D5AB4C50@phx.gbl>

Thanks for all your help.

Using Istvan Albert's suggestion, I have recompared the speed of the 
following funciton:
matlab:
function [z]=bench2(n)
for i=1:n,
    j=(0:999);
    z=log(j+1);
end 

python:
from  numpy import arange, log
def bench4(n):
    for i in xrange(n):
        nums = arange( n )
        a = log( nums + 1)

Python actually is faster than Matlab.

tic; z=bench2(1000); toc
Elapsed time is 0.159485 seconds.

Python:
>>> import timeit
>>> t=timeit.Timer("bench1.bench4(1000)","import bench1")
>>> t.repeat(1,1)
[0.10052953657517924]

Thanks again.

Frank
>From: ajaksu <ajaksu at gmail.com>
>To: python-list at python.org
>Subject: Re: Speed of Python
>Date: Fri, 07 Sep 2007 19:27:45 -0000
>
>On Sep 7, 2:37 pm, "wang frank" <f... at hotmail.co.jp> wrote:
> > I am not familiar with python, so I just simply try to reproduce the 
same
> > code in python.
>Seems almost correct, but from what I guess of MatLab, George's
>suggestions make it a bit more fair.
>
> > If you think that my python script is not efficient, could you tell me 
how
> > to make it more efficient?
>In pure Python? No idea (besides using Roberto's and George's
>suggestions). If you allow for extensions, Istvan has the answer. If
>you allow compiling Python to C++ (using ShedSkin: 
http://shed-skin.blogspot.com/),
>here's a small report:
>
>----------
>ajaksu at Belkar:~/sandbox$ cat bench.py
>import math
>n = 1
>def bench1(n):
>         for i in range(n):
>                 for j in range(1000):
>                         m=j+1
>                         z=math.log(m)
>                         z1=math.log(m+1)
>                         z2=math.log(m+2)
>                         z3=math.log(m+3)
>                         z4=math.log(m+4)
>                         z5=math.log(m+5)
>                         z6=math.log(m+6)
>                         z7=math.log(m+7)
>                         z8=math.log(m+8)
>                         z9=math.log(m+9)
>         return z9
>a = bench1(10)
>
>ajaksu at Belkar:~/sandbox$ ss -e bench.py
>*** SHED SKIN Python-to-C++ Compiler 0.0.22 ***
>Copyright 2005-2007 Mark Dufour; License GNU GPL version 2 (See
>LICENSE)
>(Please send bug reports here: mark.dufour at gmail.com)
>
>[iterative type analysis..]
>**
>iterations: 2 templates: 44
>[generating c++ code..]
>ajaksu at Belkar:~/sandbox$ make bench.so
>g++  -O3 -s -pipe -fomit-frame-pointer  -I/home/ajaksu/shedskin-0.0.22/
>lib -g -fPIC -I/usr/include/python2.5 -D__SS_BIND /home/ajaksu/
>shedskin-0.0.22/lib/builtin.cpp /home/ajaksu/shedskin-0.0.22/lib/
>math.cpp bench.cpp -lgc  -shared -Xlinker -export-dynamic -lpython2.5 -
>o bench.so
>
>ajaksu at Belkar:~/sandbox$ mv bench.py pbench.py
>
>ajaksu at Belkar:~/sandbox$ ipython
>Python 2.5.1 (r251:54863, May  2 2007, 16:56:35)
>[...]
>In [1]: from pbench import bench1 as pbench1
>
>In [2]: from bench import bench1
>
>In [3]: %timeit a = bench1(10)
>100 loops, best of 3: 10.2 ms per loop
>
>In [4]: %timeit a = pbench1(10)
>10 loops, best of 3: 92.8 ms per loop
>
>----------
>
>I guess you'd also see nice improvements from Pyrex or Cython, Blitz
>and other tools. Check 
http://wiki.python.org/moin/PythonSpeed/PerformanceTips
>for the general ideas and http://scipy.org/PerformancePython for an
>insight on available tools that even compares their speeds to Matlab.
>
>And-if-you-run-more-benchmarks-please-do-post-them-ly yrs,
>Daniel
>


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

_________________________________________________________________
3?????????????????3?????????? ?????2.2???
? http://clk.atdmt.com/GBL/go/msnjpqjl0060000010gbl/direct/01/ 



From bignose+hates-spam at benfinney.id.au  Wed Sep 19 22:52:38 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 20 Sep 2007 12:52:38 +1000
Subject: cmsg cancel <87sl5aw0k0.fsf@benfinney.id.au>
Message-ID: <87bqbyvyix.fsf@benfinney.id.au>

I am canceling my own article.


From ldo at geek-central.gen.new_zealand  Mon Sep 24 00:40:36 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 24 Sep 2007 16:40:36 +1200
Subject: building a GUI
References: <1190557293.266783.251480@y42g2000hsy.googlegroups.com>	<mailman.940.1190560838.2658.python-list@python.org>	<pan.2007.09.23.17.41.52@gmail.com>	<mailman.945.1190571251.2658.python-list@python.org>
	<5lnp2rF90pqqU1@mid.uni-berlin.de>
	<mailman.949.1190578572.2658.python-list@python.org>
Message-ID: <fd7f44$gnf$1@lust.ihug.co.nz>

In message <mailman.949.1190578572.2658.python-list at python.org>, stef
mientki wrote:

> ... I never looked at PyQt seriously, because of their weird license.

What's weird about it? Lots of software products are dual-licensed, e.g.
MySQL, Perl.


From steve at holdenweb.com  Sat Sep  1 12:07:33 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 01 Sep 2007 12:07:33 -0400
Subject: metaclasses: timestamping instances
In-Reply-To: <f4cc03640709010706x352f097wdfe9e7fc3612580b@mail.gmail.com>
References: <f4cc03640709010706x352f097wdfe9e7fc3612580b@mail.gmail.com>
Message-ID: <fbc2ob$m7a$1@sea.gmane.org>

km wrote:
> Hi all,
> 
> I have extended a prototype idea from Alex Martelli's resource on 
> metaclasses regarding time stamping of instances.
> 
> <code>
> import time
> class Meta(type):
>     start = time.time()
>     def __call__(cls, *args, **kw):
>         print 'Meta start time  %e'%cls.start
>         x = super(Meta, cls).__call__(*args, **kw)
>         current_time = time.time()
>         x._created = current_time - Meta.start
>         Meta.start = time.time()
>         return x
>    
> class X(object):
>     __metaclass__ = Meta
> class Y(X):
>     __metaclass__ = Meta
>     pass
> a = X()
> print 'a time stamp %e'%a._created
> b = Y()
> print 'b time stamp %e'%b._created
> print abs(a._created - b._created)
> </code>
> 
> I donot understand the difference between
> 1) setting __metaclass__ to 'Meta'  in class Y
> 2) not setting  __metaclass__  to Meta in class Y
> 
> Why is the difference in behaviour of time stamping between 1 & 2 ?
> 
> kindly enlighten
> 
I don't see and difference. The rules for establishing the metaclass of 
a class are fairly well defined: see

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

which says

     * If dict['__metaclass__'] exists, it is used.

     * Otherwise, if there is at least one base class, its metaclass is 
used (this looks for a __class__ attribute first and if not found, uses 
its type).

     * Otherwise, if a global variable named __metaclass__ exists, it is 
used.

     * Otherwise, the old-style, classic metaclass (types.ClassType) is 
used.

By the second rule it would appear that the metaclass of X is the same 
as that of Y even if the __metaclass__ assignment is commented out, and 
informal testing appears to show that this is the case.

Debugging with Wing IDE and examining the classes at a breakpoint shows 
this to be true (even after Y's __metaclass__ assignment is commented out):

 >>> X.__metaclass__
<class '__main__.Meta'>
 >>> Y.__metaclass__
<class '__main__.Meta'>
 >>>

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From mail at timgolden.me.uk  Thu Sep 20 09:21:51 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 20 Sep 2007 14:21:51 +0100
Subject: frange() question
In-Reply-To: <fctrc1$doh$1@news.nems.noaa.gov>
References: <fctrc1$doh$1@news.nems.noaa.gov>
Message-ID: <46F273EF.6060001@timgolden.me.uk>

George Trojan wrote:
> A while ago I found somewhere the following implementation of frange():
.
.
.
>      return (limit1 + n*increment for n in range(count))
> 
> I am puzzled by the parentheses in the last line. Somehow they make 
> frange to be a generator:

> But I always thought that generators need a keyword "yield". What is 
> going on here?

That's what's known as a generator expression:

http://docs.python.org/ref/genexpr.html
http://www.python.org/dev/peps/pep-0289/

TJG


From http  Sun Sep  2 02:04:56 2007
From: http (Paul Rubin)
Date: 01 Sep 2007 23:04:56 -0700
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<7xlkbsmqe4.fsf@ruckus.brouhaha.com>
	<1188525647.003223.199620@q5g2000prf.googlegroups.com>
	<mailman.181.1188527203.28954.python-list@python.org>
	<1188537516.622167.115080@z24g2000prh.googlegroups.com>
	<mailman.217.1188577500.28954.python-list@python.org>
	<1188585630.539835.242460@i38g2000prf.googlegroups.com>
	<mailman.234.1188588307.28954.python-list@python.org>
	<1188592039.612652.223700@r23g2000prd.googlegroups.com>
	<1i3ryxd.g2pzgq159lt5sN%aleax@mac.com>
	<1188711881.370954.175830@o80g2000hse.googlegroups.com>
Message-ID: <7xfy1xob5j.fsf@ruckus.brouhaha.com>

Russ <uymqlp502 at sneakemail.com> writes:
> > try:
> >   blah blah with as many return statements as you want
> > finally:
> >   something that gets executed unconditionally at the end
> Thanks. I didn't think of that.
> So design by contract *is* relatively easy to use in Python already.
> The main issue, I suppose, is one of aesthetics. Do I want to use a
> lot of explicit function calls for pre and post-conditions and "try/
> finally" blocks in my code to get DbC (not to mention a global
> variable to enable or disable it)?

I still don't understand why you don't like the decorator approach,
which can easily implement the above.

> I personally use Python for its clean syntax and its productivity with
> my time, so I am certainly not denigrating it. For the R&D work I do,
> I think it is very appropriate. But I did raise a few eyebrows when I
> first started using it. I used C++ several years ago, and I thought
> about switching to Ada a few years ago, but Ada just seems to be
> fading away (which I think is very unfortunate, but that's another
> story altogether).

It seems to be getting displaced by Java, which has some of the same
benefits and costs as Ada does.  

I've gotten interested in static functional languages (including proof
assistants like Coq, that can generate certified code from your
mechanically checked theorems).  But I haven't done anything serious
with any of them yet.  I think we're in a temporary situation where
all existing languages suck (some more badly than others) but the
functional languages seem like a more promising direction to get out
of this hole.


From UrsusMaximus at gmail.com  Sun Sep 23 18:22:26 2007
From: UrsusMaximus at gmail.com (UrsusMaximus at gmail.com)
Date: Sun, 23 Sep 2007 15:22:26 -0700
Subject: SimPy, audio interview with creators of
Message-ID: <1190586146.546763.218070@r29g2000hsg.googlegroups.com>

SimpPy is a powerful simulation package for Python.

I have just posted an interview (podcast) with Dr. Klaus Muller in
Amsterdam and Professor Tony Vignaux in New Zealand about their
creation, SimPY, an object-oriented, process-based discrete-event
simulation language based on standard Python.

Check it out at www.awaretek.com



From bignose+hates-spam at benfinney.id.au  Mon Sep  3 19:55:42 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 04 Sep 2007 09:55:42 +1000
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<46d674c2$0$417$426a34cc@news.free.fr>
	<878x7te9h4.fsf@benfinney.id.au>
	<MPG.2146681e70c0336a98970f@news.individual.de>
Message-ID: <87bqcj9udd.fsf@benfinney.id.au>

Thorsten Kampe <thorsten at thorstenkampe.de> writes:

> * Ben Finney (Thu, 30 Aug 2007 18:02:15 +1000)
> > Bruno Desthuilliers <bruno.42.desthuilliers at wtf.websiteburo.oops.com> writes:
> > > What's with using your brain instead of whining ?
> > 
> > Now now, no need for snappiness.
> 
> Actually there was. The OP's claim [...] ...is just plain nonsense.

Which was pointed out in several ways without snapping. Hence the part
of my response you omitted.

Ben Finney wrote:

> If you don't feel a constructive response is merited, please ignore.

There's no need to fuel flames with content-free flaming, and Bruno
agreed with that when it was pointed out. If one doesn't have the time
or inclination to post a constructive response, not responding at all
is better than flaming.

The Python community is remarkable for its low level of flaming and
high level of content in this forum, even in response to poor
attitudes and cluelessness. I'd like it to remain that way.

-- 
 \          "I don't like country music, but I don't mean to denigrate |
  `\          those who do. And for the people who like country music, |
_o__)                     denigrate means 'put down'."  -- Bob Newhart |
Ben Finney


From raychorn at hotmail.com  Sat Sep 22 00:55:01 2007
From: raychorn at hotmail.com (Python Maniac)
Date: Fri, 21 Sep 2007 21:55:01 -0700
Subject: I could use some help making this Python code run faster using
	only Python code.
In-Reply-To: <mailman.905.1190418492.2658.python-list@python.org>
References: <1190325588.608625.259800@q3g2000prf.googlegroups.com>
	<1190328413.226577.206740@k79g2000hse.googlegroups.com>
	<1190330015.131971.265680@y42g2000hsy.googlegroups.com>
	<1190357165.381313.197910@19g2000hsx.googlegroups.com>
	<Xns99B25B0334892duncanbooth@127.0.0.1>
	<1190394011.148384.106280@q3g2000prf.googlegroups.com>
	<mailman.897.1190412168.2658.python-list@python.org>
	<1190417120.723579.267560@22g2000hsm.googlegroups.com>
	<mailman.905.1190418492.2658.python-list@python.org>
Message-ID: <1190436901.529332.326010@19g2000hsx.googlegroups.com>

On Sep 21, 4:48 pm, "Matt McCredie" <mccre... at gmail.com> wrote:
> > It would be nice if Python could be made to automatically detect the
> > LC and string translation patterns used by the unoptimized Python code
> > and make them into optimized Python code on the fly at runtime.  I am
> > more than a little amazed nobody has chosen to build a JIT (Just In-
> > Time compiler) or cached-compiler into Python but maybe that sort of
> > thing is just not needed given the fact that Python code can be easily
> > optimized to run 30x faster.
>
> See PyPyhttp://codespeak.net/pypy/for a JIT comiler for python.
> Although it is in the research phase, but worth taking a look at.
>
> Matt

You need to check-out a project called Psyco (forerunner for pypy).

I was able to get almost 2x better performance by adding 3 lines of
code for Psyco.

See also: http://psyco.sourceforge.net/download.html

I am rather amazed !  Psyco was able to give much better performance
above and beyond the already optimized Python code without negatively
impacting performance during its analysis at runtime.



From lorenzo.digregorio at gmail.com  Fri Sep 14 08:38:11 2007
From: lorenzo.digregorio at gmail.com (Lorenzo Di Gregorio)
Date: Fri, 14 Sep 2007 05:38:11 -0700
Subject: "once" assigment in Python
In-Reply-To: <46ea4381$0$15390$4c368faf@roadrunner.com>
References: <1189750616.597409.85380@w3g2000hsg.googlegroups.com>
	<46ea4381$0$15390$4c368faf@roadrunner.com>
Message-ID: <1189773491.560250.205580@y42g2000hsy.googlegroups.com>

Thank you very much for your suggestions!
I'll try in the next days to elaborate a bit on the last two ones.

By the way, the "once" assignment is not that evil if you use it for
hardware modeling.
Most hardware models look like:

wire1 = function()
instance component(input=wire1,output=wire2)
result = function(wire2)

When employing Python it's pretty straightforward to translate the
instance to an object.

instance = Component(input=wire1,output=wire2)

Then you don't use "instance" *almost* anymore: it's an object which
gets registered with the simulator kernel and gets called by reference
and event-driven only by the simulator kernel.  We might reuse the
name for calling some administrative methods related to the instance
(e.g. for reporting) but that's a pretty safe thing to do.  Of course
all this can be done during initialization, but there are some good
reasons (see Verilog vs VHDL) why it's handy do be able to do it
*anywhere*.  The annoying problem was that every time the program flow
goes over the assignment, the object gets recreated.

Indeed Python itself is not a hardware modeling language, but I built
some infrastructure to fill what I was missing and for quickly
building up a functional prototype and testing some ideas Python is
really excellent.

Best Regards,
Lorenzo



From stefan.behnel-n05pAM at web.de  Sat Sep 22 16:28:07 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Sat, 22 Sep 2007 22:28:07 +0200
Subject: An Editor that Skips to the End of a Def
In-Reply-To: <D2WIi.28146$eY.22404@newssvr13.news.prodigy.net>
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk>
	<tfAIi.51111$Um6.44314@newssvr12.news.prodigy.net>
	<YPGIi.54591$YL5.26012@newssvr29.news.prodigy.net>
	<874phou1pa.fsf@benfinney.id.au>
	<e8HIi.3303$4J3.1378@newssvr22.news.prodigy.net>
	<46f3708c$0$32593$426a74cc@news.free.fr>
	<D2WIi.28146$eY.22404@newssvr13.news.prodigy.net>
Message-ID: <46F57AD7.6050905@web.de>

W. Watson wrote:
> Bruno Desthuilliers wrote:
>> W. Watson a ?crit :
>>> How about in the case of MS Win?
>>>
>>> Ben Finney wrote:
>>>>
>>>> (Please don't top-post. Instead, reply below each point to which
>>>> you're responding, removing quoted text irrelevant to your response.)
>>>>
>>
>> Wayne, may I second Ben on his suggestion to stop top-posting ?
> 
> Well, you may. Unfortunately, there are many NGs that do the opposite.

Well, not this one.

Stefan


From rbonvall at gmail.com  Sun Sep 16 01:21:31 2007
From: rbonvall at gmail.com (Roberto Bonvallet)
Date: Sat, 15 Sep 2007 22:21:31 -0700
Subject: subclass of integers
In-Reply-To: <1189780201.692192.291010@k79g2000hse.googlegroups.com>
References: <1189780201.692192.291010@k79g2000hse.googlegroups.com>
Message-ID: <1189920091.529076.82100@d55g2000hsg.googlegroups.com>

On Sep 14, 10:30 am, Mark Morss <mfmo... at aep.com> wrote:
> I would like to construct a class that includes both the integers and
> None.  I desire that if x and y are elements of this class, and both
> are integers, then arithmetic operations between them, such as x+y,
> return the same result as integer addition.  However if either x or y
> is None, these operations return None.

No need to create a new class:

    try:
        result = a * b
    except TypeError:
        result = None

--
Roberto Bonvallet



From simon at brunningonline.net  Fri Sep 28 10:59:33 2007
From: simon at brunningonline.net (Simon Brunning)
Date: Fri, 28 Sep 2007 15:59:33 +0100
Subject: Emailing the attachment created with the Quick Screenshots
	Script(Python + PIL)
In-Reply-To: <000001c801de$b670c370$eafca8c0@tfccorp.intra>
References: <000001c801de$b670c370$eafca8c0@tfccorp.intra>
Message-ID: <8c7f10c60709280759r652feb88t602b31485effef18@mail.gmail.com>

On 9/28/07, Mark Bratcher <mbratcher at cclpcitrus.com> wrote:
>
> I tried the suggestion at the other end of this link without any luck.  Does
> anyone have a working script which will send the screenshot file created by
> the Quick Screenshots Script (Python + PIL)?  I receive errors like access
> denied errors and not defined errors.

Could you show us the code you are running, and the exact error
messages that you get? This might be worth a look:
<http://tinyurl.com/anel>
.

-- 
Cheers,
Simon B.
simon at brunningonline.net


From mail at timgolden.me.uk  Mon Sep  3 04:28:59 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Mon, 03 Sep 2007 09:28:59 +0100
Subject: Soemthing wrong w/ urllib module or something.
In-Reply-To: <eb79828c0709021754h17c89a52ld36990c4e2a535c@mail.gmail.com>
References: <eb79828c0709021754h17c89a52ld36990c4e2a535c@mail.gmail.com>
Message-ID: <46DBC5CB.3040007@timgolden.me.uk>

Lamonte Harris wrote:
> Error Message in cmd:
> Traceback (most recent call last):
>   File "wniamp_lastest5_playlist.py", line 25, in <module>
>     response = urllib2.urlopen(request)
>   File "C:\Python25\lib\urllib2.py", line 121, in urlopen
>     return _opener.open(url, data)
>   File "C:\Python25\lib\urllib2.py", line 374, in open
>     response = self._open(req, data)
>   File "C:\Python25\lib\urllib2.py", line 392, in _open
>     '_open', req)
>   File "C:\Python25\lib\urllib2.py", line 353, in _call_chain
>     result = func(*args)
>   File "C:\Python25\lib\urllib2.py", line 1100, in http_open
>     return self.do_open(httplib.HTTPConnection, req)
>   File "C:\Python25\lib\urllib2.py", line 1075, in do_open
>     raise URLError(err)
> urllib2.URLError: <urlopen error (10053, 'Software caused connection
> abort')>

> For some reason its not acting right when trying to run.  I get that error
> message and I never seen anything like it.

My experience is that that error message represents the local firewall
or virus scanner blocking your network activity. That said, it doesn't
seem likely that your firewall is blocking activity on port 80 without
your having noticed! Maybe the domain you're posting to is selectively
blacklisted by your local firewall?

To do the obvious, can you open a socket connection to the domain you're
using?

<code>
from socket import socket
socket ().connect (("DOMAINHERE", 80))

</code>

or does it give you the same error?

TJG


From dotancohen at gmail.com  Tue Sep 11 20:49:49 2007
From: dotancohen at gmail.com (Dotan Cohen)
Date: Wed, 12 Sep 2007 03:49:49 +0300
Subject: wx module?
In-Reply-To: <880dece00709111745p2f816833j8f2cdaf2113633ee@mail.gmail.com>
References: <880dece00709111745p2f816833j8f2cdaf2113633ee@mail.gmail.com>
Message-ID: <880dece00709111749p725caf73pcbe8f8fc003cf431@mail.gmail.com>

False alarm, found it, sorry...


From pavlovevidence at gmail.com  Sat Sep 22 04:51:31 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sat, 22 Sep 2007 04:51:31 -0400
Subject: Would Anonymous Functions Help in Learning Programming/Python?
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<46f45f02$0$15350$4c368faf@roadrunner.com>
	<7xps0bgq6p.fsf@ruckus.brouhaha.com>
Message-ID: <46f4dd90$0$32490$4c368faf@roadrunner.com>

On Fri, 21 Sep 2007 23:38:38 -0700, Paul Rubin wrote:

> Carl Banks <pavlovevidence at gmail.com> writes:
>> Especially someone like an
>> engineer (in the classical sense), who isn't building versatile
>> software packages, won't need to resort to functional programming much.
> 
> http://www.math.chalmers.se/~rjmh/Papers/whyfp.html

>From the link:

"Abstract
As software..."

That's it, lost me already.  You ever see the kinds of programs 
mechanical engineers write?  It isn't software.


Carl Banks


From pcooke at philc.net  Mon Sep  3 14:17:54 2007
From: pcooke at philc.net (PhilC)
Date: Mon, 03 Sep 2007 14:17:54 -0400
Subject: Applying transformation matrix to 3D vertex coordinates
Message-ID: <5rjod3lih4mnupjcm2184k5no15eodlc8r@4ax.com>

'''
################################################
Task:-
to apply a translation array to an array
of 3D vertex coordinates to produce the
resulting location of each vertices.

Translation array and vertex coordinates taken from
a Truespace COB file.

The text in the COB file looks like this:-

Transform
-2.11786 -0.817596 0.946387 0.864939
0.405189 1.25484 2.11894 0.434915
-1.16679 1.9198 -0.981965 1.13894
0 0 0 1
World Vertices 8
-0.200000 -0.029486 -0.236313
0.200000 0.029486 -0.163687
-0.200000 0.370514 -0.282911
-0.200000 0.370514 0.117089
-0.200000 -0.029486 0.163687
0.200000 0.029486 0.236313
0.200000 0.429486 -0.210286
0.200000 0.429486 0.189714

###############################################
'''
# script start 

import Numeric
 
transArray = Numeric.array((
(-2.11786, -0.817596, 0.946387, 0.864939),
(0.405189, 1.25484, 2.11894, 0.434915),
(-1.16679, 1.9198, -0.981965, 1.1389),
(0, 0, 0, 1)
))

# a "1" added to the end of each set of vertix coordinates
vertArray = Numeric.array((
(-0.200000, -0.029486, -0.236313, 1),
(0.200000, 0.029486, -0.163687, 1),
(-0.200000, 0.370514, -0.282911, 1),
(-0.200000, 0.370514, 0.117089, 1),
(-0.200000, -0.029486, 0.163687, 1),
(0.200000, 0.029486, 0.236313, 1),
(0.200000, 0.429486, -0.210286, 1),
(0.200000, 0.429486, 0.189714, 1)
))

print transArray
print ""
print vertArray
print ""

transArray = Numeric.reshape(transArray,(4,4))
vertArray = Numeric.reshape(vertArray,(4,8))

print Numeric.matrixmultiply(transArray,vertArray)

# script end
'''
##################################################################
Result:-

[[ 0.5708016   0.10309048  0.70481144 -1.12413     0.1022124
0.03400637  0.63866924 -1.12413   ]
 [-0.6688108   0.57729922 -0.19537307  4.213884    0.3408408
0.72615216  0.66384632  4.213884  ]
 [ 0.273571    1.26381257 -0.66763452  0.909945   -0.585931
1.13709619  0.39979     0.909945  ]
 [ 0.2         0.429486   -0.210286    1.          0.2
0.429486    0.189714    1.        ]]

Am I going in the right direction?
What do I do with the result? :)

Thanks,

PhilC
'''


From kar1107 at gmail.com  Sun Sep 23 02:58:02 2007
From: kar1107 at gmail.com (Karthik Gurusamy)
Date: Sun, 23 Sep 2007 06:58:02 -0000
Subject: subprocess -popen - reading stdout from child - hangs
In-Reply-To: <1190518129.356844.242710@19g2000hsx.googlegroups.com>
References: <1190518129.356844.242710@19g2000hsx.googlegroups.com>
Message-ID: <1190530682.420121.31520@y42g2000hsy.googlegroups.com>

On Sep 22, 8:28 pm, "gregpin... at gmail.com" <gregpin... at gmail.com>
wrote:
> Let's say I have this Python file called loop.py:
>
> import sys
> print 'hi'
> sys.stdout.flush()

Add sys.stdout.close()

> while 1:
>     pass
>
> And I want to call it from another Python process and read the value
> 'hi'.  How would I do it?
>
> So far I have tried this:
>
> >>> proc = subprocess.Popen('python /home/chiefinnovator/loop.py',shell=True,stdin=subprocess.PIPE,stdout=subprocess.PIPE)
> >>> proc.stdout.read()
>
> But it just hangs at read()
>
> proc.communicate() also just hangs.  What am I doing wrong?  Please
> advise.

Since your loop.py is still alive and hasn't closed its stdout, the
caller continues to wait for EOF (it doesn't know if loop.py is done
generating all its output)

Karthik

>
> Thanks,
>
> Greg




From jakub.piotr.nowak at gmail.com  Thu Sep 27 07:31:19 2007
From: jakub.piotr.nowak at gmail.com (Jakub P. Nowak)
Date: Thu, 27 Sep 2007 11:31:19 -0000
Subject: ANN: RuPy 2008 Python & Ruby Conference
Message-ID: <1190892679.411344.282060@w3g2000hsg.googlegroups.com>

RuPy 2008
Python & Ruby Conference

Poznan, Poland
April 12-13, 2008

-- Call for speakers

RuPy is a Ruby and Python conference. Held for the first time
in April 2007 it gathered enthusiasts from Poland and other
countries. The idea behind the conference was to liven up the
Ruby and Python community and make these technologies
more popular in Europe.

The first conference was a middle-sized one but came out as
a huge success. We believe it was a great experience for both
attendees and speakers.

RuPy 2008 committee is looking for speakers willing to present
a Ruby/Python related subject. If you have an interesting talk
in mind go ahead and submit a talk proposal. The talk proposal
should include a talk title, brief introduction and your short
resume/biography.

To our invited speakers we offer free accommodation, full
board and possibility to interact with a very lively IT community.
You are also free to participate in all the extra events -
last year's 'Geek party' turned out great!

You can also support us by linking to this site and informing
all your friends about the event and the possibility to submit
a talk proposal.

Potential presenters should submit an abstract to:

talks at rupy.eu

by December, 31th 2007 for consideration.

If you have any special presentation needs, let us know.

For more details check our site:
http://www.rupy.eu

Best regards,
--
Jakub P. Nowak
RuPy Committee



From kyosohma at gmail.com  Fri Sep 21 13:42:49 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 21 Sep 2007 17:42:49 -0000
Subject: TRying to import files from my folder not pythons lib folder
In-Reply-To: <1190395964.541835.114350@50g2000hsm.googlegroups.com>
References: <1190395964.541835.114350@50g2000hsm.googlegroups.com>
Message-ID: <1190396569.732154.234270@r29g2000hsg.googlegroups.com>

On Sep 21, 12:32 pm, "tedpot... at gmail.com" <tedpot... at gmail.com>
wrote:
> Hi,
>
> I'm trying to create my own lib of functions, but it seems like I can
> only import them if they are in pythons lib folder.
>
> Example
> I have a folder called
> K:\mypython
>
> Now in the interactive python shell I type
> Import k:\mypython\listall
> And get a error on :
>
> If I store listall.py in pythons lib folder and type
> Limport listall
>
> It works fins.
>
> Can I create my own library of functions and store them in a separate
> dir????
>
> Also I try to creat a folder in pythomns lib folder and that did not
> work
>
> Help
> -Ted

One workaround is to do to this:

<code>

import sys
sys.path.append(r'K:\mypython')
import listall

</code>

You can also add your path to the .pth file, but I've never done that,
so I can't tell you how.

Hope that helps!

Mike



From deets at nospam.web.de  Wed Sep 26 10:10:01 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 26 Sep 2007 16:10:01 +0200
Subject: Packaging and dependencies
References: <87ejgmklep.fsf@benfinney.id.au>
	<878x6ukkvq.fsf@benfinney.id.au>	<5luhb0Faal8aU1@mid.uni-berlin.de>
	<87zlz9kfw3.fsf_-_@benfinney.id.au>
	<mailman.1112.1190814145.2658.python-list@python.org>
Message-ID: <5lv7hpFak8ueU1@mid.uni-berlin.de>

> Agreed, but until we reach the ideal situation where everybody is using
> the same package dependency system what's your practical solution?
> "Self-contained" has the merit that nobody else's changes are going to
> bugger about with my application on a customer's system. The extra disk
> space is a small price to pay for that guarantee.

Couldn't have summed up that better. As much as I loathe Java for a variety
of reasons, and as much as it's CLASSPATH-issues suck especially in larger
projects that have _interproject-dependency-troubles_ (ever felt the joy of
having the need for several XML-parsers to be available in your
AppServer?) - the fact that one has to and can compose the CLASSPATH
explicitly for each app is often an advantage. And I don't mind the extra
diskspace - that's usually eaten by media files of dubious origins, not by
_code_ that someone has written & packaged up...

Diez


From cjw at sympatico.ca  Fri Sep 28 17:03:23 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Fri, 28 Sep 2007 17:03:23 -0400
Subject: Python 3.0 migration plans?
In-Reply-To: <1191007754.740566.137510@n39g2000hsh.googlegroups.com>
References: <1191002679.569709.16870@22g2000hsm.googlegroups.com>	<mailman.1242.1191003389.2658.python-list@python.org>	<1191005906.556751.261940@22g2000hsm.googlegroups.com>	<5m51l4Fbao07U2@mid.uni-berlin.de>
	<1191007754.740566.137510@n39g2000hsh.googlegroups.com>
Message-ID: <46FD6C1B.3010503@sympatico.ca>

TheFlyingDutchman wrote:
>> Or bind resources of these pocket protectors that otherwise would lead to
>> answers for people that do seek enlightment...
> 
> I don't think it would be correct to characterize my posts as not
> seeking enlightenment. I do also happen to voice my opinion which
> seems appropriate since this can be characterized as a discussion
> group. It theoretically is possible for a discussion group to tolerate
> opinions that diverge from the majority.
+1
> 
> One issue I have with this group and that I encountered many years ago
> in the Perl group is that there is no separate group
> comp.lang.python.beginner where you can ask questions without getting
> hit with RTFM! and the like.
> 



From paul.hankin at gmail.com  Fri Sep 21 03:48:42 2007
From: paul.hankin at gmail.com (Paul Hankin)
Date: Fri, 21 Sep 2007 07:48:42 -0000
Subject: executing list of methods (and collecting results)
In-Reply-To: <mailman.839.1190329275.2658.python-list@python.org>
References: <mailman.839.1190329275.2658.python-list@python.org>
Message-ID: <1190360922.144890.57800@19g2000hsx.googlegroups.com>

On Sep 21, 12:26 am, Gerardo Herzig <gher... at fmed.uba.ar> wrote:
> def collect_validators(self):
>     v_dict = { 'is_really_a_number': is_really_a_number,
>                       'is_even': is_even,
>                       'is_greater_than_zero', is_greater_than_zero
>                    }
>
>        for name, meth in v_dict.items():
>           result = meth()
>           if result: yield name

Are these validators actually methods rather than functions? If so,
you should write something like this:

def collect_validators(self):
    methods = ['is_really_a_number', 'is_even',
'is_greater_than_zero']
    return (m for m in methods if getattr(self, m)())

--
Paul Hankin



From fakeaddress at nowhere.org  Tue Sep 18 23:44:52 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Tue, 18 Sep 2007 20:44:52 -0700
Subject: The meaning of  a = b  in object oriented languages
In-Reply-To: <HVJHi.235$QT2.69@newsfe06.lga>
References: <1190094057.976729.285120@n39g2000hsh.googlegroups.com>
	<HVJHi.235$QT2.69@newsfe06.lga>
Message-ID: <BW0Ii.3870$3Y1.3479@newssvr17.news.prodigy.net>

Jim Langston wrote:
> Assignment operators in C++ should attempt to prevent two pointers poining 
> to the same memory location.  Consier a simple class (untested):
> 
> class Foo
> {
> public:
>    char* Data;
>    int DataSize;
>    Foo( int Size ): DataSize( Size ) { Data = new char[Size]; }
>    ~Foo() { delete Data[]; }
> };

[...]
>    Foo& operator=( const Foo& rhs )
>    {
>       delete[] Data;
>       Data = new char[rhs.DataSize];
>       memcpy( Data, rhs.Data, rhs.DataSize );
>       DataSize = rhs.DataSize;
>    }
> 
> You can see that we have to manually do some things.  We have to delete[] 
> our pointer, new a new buffer, copy the cotents, copy the DataSize over, 
> none of which the default assignment operator would of done.
[...]
> Incidently, there may be errors in the code I've shown here if you attempt 
> to compile it. Be forewarned. 

There's the "self-assignment" bug. See the popular C++ FAQ.

Follow-ups to comp.lang.c++
-- 
--Bryan


From mfmorss at aep.com  Fri Sep 14 10:31:47 2007
From: mfmorss at aep.com (Mark Morss)
Date: Fri, 14 Sep 2007 07:31:47 -0700
Subject: subclass of integers
In-Reply-To: <1189780201.692192.291010@k79g2000hse.googlegroups.com>
References: <1189780201.692192.291010@k79g2000hse.googlegroups.com>
Message-ID: <1189780307.186365.129480@19g2000hsx.googlegroups.com>

On Sep 14, 10:30 am, Mark Morss <mfmo... at aep.com> wrote:
> I would like to construct a class that includes both the integers and
> None.  I desire that if x and y are elements of this class, and both
> are integers, then arithmetic operations between them, such as x+y,
> return the same result as integer addition.  However if either x or y
> is None, these operations return None.
>
> It's simple enough to construct a subclass of integers that behave in
> this way:
>
> class Nint(int):
>     def __add__(self,other):
>         if (other != None):
>             return self+other
>         else:
>             return None
>     def __radd__(self,other):
>         if (other != None):
>             return other+self
>         else:
>             return None
>     #...and so forth
>
> However I have not been able to figure out how to make it so that
> None, as well as an integer, could be an element of my class.  My
> preliminary impression is that I have to override int.__new__; but I
> am uncertain how to do that and have been unable to find anything on
> the web explaining that.  Indeed I haven't been able to find much
> about __new__ at all.  Overriding this method of built-in classes
> seems to be quite unusual.
>
> I would very much appreciate anyone's help.

I meant of course that arithmetic operations between integer elements
would return the same result as the corresponding integer operations,
not necessarily addition.



From gagsl-py2 at yahoo.com.ar  Fri Sep 28 00:23:25 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 28 Sep 2007 01:23:25 -0300
Subject: comparing elements of a list with a string
References: <1190734785.439839.303030@50g2000hsm.googlegroups.com>
	<XLSdnddmo6KUq2TbnZ2dnUVZ_vShnZ2d@comcast.com>
	<mailman.1057.1190742568.2658.python-list@python.org>
	<1190889848.653434.178450@g4g2000hsf.googlegroups.com>
Message-ID: <op.tzbbkd01x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Thu, 27 Sep 2007 07:44:08 -0300, Shriphani <shriphanip at gmail.com>  
escribi?:

> def listAllbackups(filename):
> 	list_of_backups = glob(home+'/Desktop/backupdir/*%s*'%filename)
> 	for element in list_of_back:
> 		if element.find(file) != -1:
> 			date_components = element.split('-')[-4:-1]
> 			date = str(date_components[0]) + ":" + str(date_components[1]) +
> ":" + str(date_components[2])
> 			time = element.split('-')[-1]
> 			yield (date, time)
> print listAllbackups('fstab')
>
>
> I ran it in the terminal and I got:
>
> <generator object at 0x81ed58c>
>
> Why does it do that and not just print out all the values of (date,
> time)

Because listAllbackups is a generator function: each time someone asks it  
the next value, it runs until the "yield" statement, and pauses. Next time  
execution continues from the same point.
You have to iterate over it. Try:

for date,time in listAllbackups('fstab'):
     print date,time

or

items = list(listAllbackups('fstab'))
print items

-- 
Gabriel Genellina



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Sep 26 08:31:00 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 26 Sep 2007 14:31:00 +0200
Subject: Tracking memory usage and object life time.
References: <1190808386.571152.103710@22g2000hsm.googlegroups.com>
Message-ID: <5lv1nuFadb95U1@mid.individual.net>

Berteun Damman wrote:

> When I run a test, I disable the garbage collection during the
> test run (as is adviced), but just before starting a test I
> instruct the garbage collector to collect. Running the test
> without disabling the garbage collect doesn't show any difference
> though.

Did you check the return value of gc.collect? Also, try using
other "insight" facilities provided by the gc module.

> Where possible I explicitly 'del' some of the larger data
> structures that have been created after I don't need them anymore.

You cannot "del" structures, you only "del" names. Objects are
deleted when they are not bound to any names when and if the
garbage collector "wants" to delete them.

> I furthermore don't really see why there would be references to
> these larger objects left. (I can be mistaken of course).

Be sure to check for cyclic references, they can be a problem for
the GC.
 
Regards,


Bj?rn

-- 
BOFH excuse #343:

The ATM board has run out of 10 pound notes.  We are having a whip
round to refill it, care to contribute ?



From brown at esteem.com  Thu Sep  6 18:36:44 2007
From: brown at esteem.com (Tom Brown)
Date: Thu, 6 Sep 2007 15:36:44 -0700
Subject: why should I learn python
In-Reply-To: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
Message-ID: <200709061536.45824.brown@esteem.com>

On Thursday 06 September 2007 14:32, windandwaves wrote:
> Can someone tell me why I should learn python?  I am a webdeveloper,
> but I often see Python mentioned and I am curious to find out what I
> am missing out on.

Ease of develpment. I write everything I can in python. If I can't do it in 
python, I throw a fit and find a way to do it in python. :) I developed in 
assembly, C, C++, Prolog and Delphi. Python has been by far the easiest to 
develop in. Some people might say it is not "real programming" because it is 
so easy. Whatever. If you wan't real programming, do it in assmebly. If you 
want to get a lot done while having a lot of fun doing it, do it in python.

Tom


From whamil1 at entergy.com  Tue Sep 11 12:59:29 2007
From: whamil1 at entergy.com (Hamilton, William )
Date: Tue, 11 Sep 2007 11:59:29 -0500
Subject: Excel process still running after program completion.
In-Reply-To: <1189525558.721174.198370@19g2000hsx.googlegroups.com>
Message-ID: <588D53831C701746A2DF46E365C018CE01D2CB3E@LITEXETSP001.etrsouth.corp.entergy.com>

> From: Chris
>
> I have a python script that is driving Excel and using the win32com
> module. However, upon program completion there's still an Excel.exe
> process running in the background that I must terminate through Task
> Manager. Reading up on other threads indicate that maybe I still have
> some Excel objects referenced within my code. Is this why the process
> doesn't terminate?
> 
> The related (I hope) parts of my code is here.
> 
> x1App = Dispatch("Excel.Application")
> Book1 = x1App.Workbooks.Open(ExcelLogPath+"\\outputLog-template.xls")
> x1App.Visible = 1
> for sheets in Book1.Worksheets:
>              if sheets.Name == file_name:
>                       sheetExists = True
> if sheetExists != True:
>              activeSheet =
> Book1.Worksheets.Add(After=Book1.Worksheets(1))
>              activeSheet.Name = file_name
>              testNum[file_name] = 0
> Book1.Worksheets(file_name).Select()
> Book1.ActiveSheet.Cells(1+(testNum[file_name]*20),1).Value = "Original
> File Name"
> Book1.ActiveSheet.Cells(2+(testNum[file_name]*20),1).Value =
> file_name
> Book1.ActiveSheet.Pictures().Insert(output).Select()
> Book1.SaveAs(Filename=path)
> x1App.ActiveWorkbook.Close(SaveChanges=0)
> x1App.Quit()
> del x1App
> del Book1
> del activeSheet
> 
> What am I missing?
> 

In my Excel projects, I terminate it with:

xlBook.Close()
xlApp.Quit()

I haven't had a problem with Excel staying open after the program ends.

(On a tangent, I want to find the person who thought it was a good idea
to use the same symbol in a font for 1, l, and I and do some unpleasant
things.)


--
-Bill Hamilton


From gherron at islandtraining.com  Thu Sep 27 13:38:39 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 27 Sep 2007 10:38:39 -0700
Subject: True of False
In-Reply-To: <1b54228d0709271012h5658aef8rce2fbf40e6231a59@mail.gmail.com>
References: <1190910814.594559.30880@n39g2000hsh.googlegroups.com>	<mailman.1173.1190911739.2658.python-list@python.org>	<1190912324.363127.26100@r29g2000hsg.googlegroups.com>
	<1b54228d0709271012h5658aef8rce2fbf40e6231a59@mail.gmail.com>
Message-ID: <46FBEA9F.20103@islandtraining.com>

Richard Thomas wrote:
> On 27/09/2007, Casey <Caseyweb at gmail.com> wrote:
>   
>> On Sep 27, 12:48 pm, "Simon Brunning" <si... at brunningonline.net>
>> wrote:
>>     
>>> On 9/27/07, kou... at hotmail.com <kou... at hotmail.com> wrote:
>>>
>>>       
>>>> I tried writing a true and false If statement and didn't get
>>>> anything?  I read some previous posts, but I must be missing
>>>> something.  I just tried something easy:
>>>>         
>>>> a = ["a", "b", "c", "d", "e", "f"]
>>>>         
>>>> if "c" in a == True:
>>>>      Print "Yes"
>>>>         
>>>> When I run this, it runs, but nothing prints.  What am I doing wrong?
>>>>         
>>> Just use
>>>
>>> if "c" in a:
>>>
>>> and all will be well. The True object isn't the only truthy value in
>>> Python - see <http://docs.python.org/lib/truth.html>.
>>>       
>> I would recommend the OP try this:
>>
>> run the (I)python shell and try the following:
>>
>>     
>>>>> a = [x for x in "abcdefg"]
>>>>> a
>>>>>           
>> ['a','b','c','d','e','f','g']
>>     
>>>>> "c" in a
>>>>>           
>> True
>>     
>>>>> "c" in a == True
>>>>>           
>> False
>>     
>>>>> ("c" in a) == True
>>>>>           
>> True
>>
>> The reason your conditional failed is that it was interpreted as "c"
>> in (a == True) which is False.
>> the "==" operator binds at a higher precedence level than the "in"
>> operator, just as multiplication
>> binds higher than addition
>>
>>     
>
> Actually it evaluates '("c" in a) and (a == True)'. You can check like so:
>
> import dis
> a = list("abcdef")
> dis.dis(lambda: "c" in a == True)
>
> And just follow the bytecode operations.
>   
Yikes.  So I did that and you're correct.   I've always looked at
chained comparisons with mild suspicion.  Now I guess that suspicion is
justified.  Interpreting
    a<b<c
as
    a<b and b<c
make perfect sense to me, but interpreting
    "c" in a == True
as
    ("c" in a) and (a == True)
is not at all natural.

Gary Herron

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



From chris.olekas at gmail.com  Tue Sep 11 11:45:58 2007
From: chris.olekas at gmail.com (Chris)
Date: Tue, 11 Sep 2007 08:45:58 -0700
Subject: Excel process still running after program completion.
Message-ID: <1189525558.721174.198370@19g2000hsx.googlegroups.com>

I have a python script that is driving Excel and using the win32com
module. However, upon program completion there's still an Excel.exe
process running in the background that I must terminate through Task
Manager. Reading up on other threads indicate that maybe I still have
some Excel objects referenced within my code. Is this why the process
doesn't terminate?

The related (I hope) parts of my code is here.

x1App = Dispatch("Excel.Application")
Book1 = x1App.Workbooks.Open(ExcelLogPath+"\\outputLog-template.xls")
x1App.Visible = 1
for sheets in Book1.Worksheets:
             if sheets.Name == file_name:
                      sheetExists = True
if sheetExists != True:
             activeSheet =
Book1.Worksheets.Add(After=Book1.Worksheets(1))
             activeSheet.Name = file_name
             testNum[file_name] = 0
Book1.Worksheets(file_name).Select()
Book1.ActiveSheet.Cells(1+(testNum[file_name]*20),1).Value = "Original
File Name"
Book1.ActiveSheet.Cells(2+(testNum[file_name]*20),1).Value =
file_name
Book1.ActiveSheet.Pictures().Insert(output).Select()
Book1.SaveAs(Filename=path)
x1App.ActiveWorkbook.Close(SaveChanges=0)
x1App.Quit()
del x1App
del Book1
del activeSheet

What am I missing?



From tomharding at inbox.com  Tue Sep 18 08:03:41 2007
From: tomharding at inbox.com (Thomas Harding)
Date: Tue, 18 Sep 2007 04:03:41 -0800
Subject: Using python to create windows apps that everyone can use?
Message-ID: <7C008A37566.00000D2Atomharding@inbox.com>

An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070918/0a687fb4/attachment.html>

From uymqlp502 at sneakemail.com  Sun Sep  2 03:33:12 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Sun, 02 Sep 2007 00:33:12 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188709535.459572.22130@r34g2000hsd.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<4866bea60708291013g56b3dea9m7abcf5e4e4f6e29c@mail.gmail.com>
	<mailman.120.1188423362.28954.python-list@python.org>
	<K_bCi.721$7P7.506@newssvr19.news.prodigy.net>
	<1188709535.459572.22130@r34g2000hsd.googlegroups.com>
Message-ID: <1188718392.682454.271110@k79g2000hse.googlegroups.com>

On Sep 1, 10:05 pm, Russ <uymqlp... at sneakemail.com> wrote:

> changing the language itself. Someone please correct me if I am wrong,
> but I think PEP adds only to the libraries.

I meant to write PEP 316, of course.



From tim at timgolden.me.uk  Thu Sep  6 13:41:49 2007
From: tim at timgolden.me.uk (Tim Golden)
Date: Thu, 06 Sep 2007 18:41:49 +0100
Subject: Finding specific date ranges
In-Reply-To: <1189099759.833051.253020@y42g2000hsy.googlegroups.com>
References: <1189090603.285778.282060@g4g2000hsf.googlegroups.com>	<mailman.161.1189094229.2658.python-list@python.org>
	<1189099759.833051.253020@y42g2000hsy.googlegroups.com>
Message-ID: <46E03BDD.1030403@timgolden.me.uk>

> Thanks! I'll try it both ways and see if there's any appreciable
> difference in speed, although since it will be packaged into an
> executable, that may not be an issue anyway.
> 
> Mike

I honestly doubt there's any advantage to my approach, certainly
not in terms of speed. It's really only if it happens to suit
your mind better, or take advantage of structures you might
already have in place, etc.

TJG


From hniksic at xemacs.org  Wed Sep 19 07:16:08 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Wed, 19 Sep 2007 13:16:08 +0200
Subject: super() doesn't get superclass
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au>
	<46f0fba0$0$29605$426a34cc@news.free.fr>
	<1190199134.791808.267110@22g2000hsm.googlegroups.com>
Message-ID: <87fy1a6h3b.fsf@mulj.homelinux.net>

Michele Simionato <michele.simionato at gmail.com> writes:

> On Sep 19, 12:36 pm, Bruno Desthuilliers <bruno.
> 42.desthuilli... at wtf.websiteburo.oops.com> wrote:
>
>> The next class in the MRO *is* a superclass of the *instance*. Else it
>> wouldn't be in the MRO !-)
>
> Bruno, there is no such a thing as a superclass in a multiple
> inheritance world, and it is a very bad idea to continue to use that
> terminology.

Your arguments against the superclass term seem to assume that there
is only a single superclass to a particular class.  In the example you
give in your essay, I would say that all of A, B, and T are
superclasses of C, and Python's super correctly iterates over all of
them.

Wikipedia defines superclass as a "class from which other classes are
derived", which seems perfectly valid for MI.


From steve at holdenweb.com  Thu Sep 27 08:27:50 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 27 Sep 2007 08:27:50 -0400
Subject: URGENT REQUIREMENT FOR PYTHON DEVELOPERS
In-Reply-To: <20070926221048.CD77B1E4009@bag.python.org>
References: <20070926221048.CD77B1E4009@bag.python.org>
Message-ID: <46FBA1C6.4020308@holdenweb.com>

Krishna:

You might want to consider reading

   http://www.python.org/community/jobs/howto/

and submitting these jobs to the Job Board. It's free.

regards
  Steve

kishore at mindriver-it.com wrote:
> HI
> 
>  
> 
> THIS IS KRISHNA KISHORE FROM MindRiver. We have an Urgent requirement 
> for Python Developers who have 5-7 YRS of EXP.
> 
>  
> 
>  SKILLS  :PYTHON AND C/C++
> 
>  
> 
>    WORK LOCATION    :  BANGALROE
> 
>  
> 
>      PLEASE REVERT US WITH YOUR UPDATED PROFILES.
> 
>  
> 
> Thanks & Regards,
> 
> Kishore Seethanraju |Senior Associate-People Consulting| MindRiver 
> Information Technologies Pvt. Ltd.
> Suite# 512, 4th Floor and Suite # 104, Ground Floor ,Oxford Towers, 139, 
> Airport Road, Bangalore 560 008| Tel: +91.80.3052.1600 |Direct: 
> +91.80.3057.5799| Mobile: + 91.9901 96 1696 | Fax: +91.80.3057.5797| 
> Email: kishore at mindriver-it.com <mailto:skishore at mindriver-it.com> | Web 
> www.mindriver-it.com <http://www.mindriver-it.com/>
> 
> Information transmitted by this-mail is proprietary to MindRiver and / 
> or its Customers and is intended for use only by the individual or 
> entity to which it is addressed, and may contain information that is 
> privileged, confidential or exempt from disclosure under applicable law. 
> If you are not the intended recipient or it appears that this mail has 
> been forwarded to you without proper authority, you are notified that 
> any use or dissemination of this information in any manner is strictly 
> prohibited. In such cases, please notify us immediately at the above 
> mentioned telephone number or email to services at mindriver-it.com 
> <mailto:services at mindriver-it.com> and delete this mail from your 
> records. We believe this email to be virus free but do not warrant that 
> this is the case and we will not accept liability for any losses arising 
> from any virus being transmitted unintentionally by us'
> 
>  
> 


-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From hniksic at xemacs.org  Mon Sep 17 18:56:02 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Tue, 18 Sep 2007 00:56:02 +0200
Subject: class that keeps track of instances
References: <fcmu0m$61c$1@geraldo.cc.utexas.edu>
Message-ID: <87myvkj3zx.fsf@mulj.homelinux.net>

<yosuke at ccwf.cc.utexas.edu> writes:

> 1) New instance has to have a property called 'name'
> 2) When instance is attemped to created, e.g., x=kls(name='myname'), and
> there already exists an instance with obj.name =='myname', that
> pre-existing instance is returned, instead of making new one.  
> 3) A class property 'all' for class gives me a list of all the
> instances.  So kls.all lets me iterates through all instances.
> 4) When all the hard-link to an instance is deleted, the instance should
> be deleted, just like an instance from any regular class does.

class Meta(type):
  all = property(lambda type: type.cache.values())

class kls(object):
  __metaclass__ = Meta
  cache = weakref.WeakValueDictionary()
  def __new__(cls, name):
    if name in kls.cache:
        return kls.cache[name]
    self = object.__new__(cls)
    self.name = name
    kls.cache[name] = self
    return self

>>> x = kls(name='foo')
>>> x
<__main__.kls object at 0xb7d5dc8c>
>>> x is kls(name='foo')
True
>>> x is kls(name='bar')
False
>>> print kls.all        # only one instance, 'bar' was short-lived
[<__main__.kls object at 0xb7d5dc8c>]
>>> x = 'somethingelse'
>>> print kls.all
[]

> Assuming that I have to write it on my own, what should I do?  I
> tried to implement it using weakref.WeakValueDictionary and
> metaclass, but instance doesn't disappear when I think it should
> disappear.  I am also wondering if it is easier to keeping
> {name:id(obj)} would be a better solution.

The problem is that, given just an ID, you have no way to get a hold
of the actual object.


From iclark at mail.ewu.edu  Thu Sep 20 19:56:50 2007
From: iclark at mail.ewu.edu (Ian Clark)
Date: Thu, 20 Sep 2007 16:56:50 -0700
Subject: HTTP Protocol Client
In-Reply-To: <1190196612.082912.149690@v23g2000prn.googlegroups.com>
References: <1190196612.082912.149690@v23g2000prn.googlegroups.com>
Message-ID: <fcv1c2$6a0$1@sea.gmane.org>

welcomestocontact at gmail.com wrote:
> h = httplib.HTTP('http://Google.com',80)

This should be:
h = httplib.HTTP('Google.com',80)

And I certainly agree with the others, check out urllib*.

Ian



From gagsl-py2 at yahoo.com.ar  Thu Sep  6 20:17:05 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 06 Sep 2007 21:17:05 -0300
Subject: Getting original working directory
References: <fbpgvn$sa6$1@sea.gmane.org>
	<1658.1882-17889-1055570935-1189104422@seznam.cz>
Message-ID: <op.tx9cerspx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 06 Sep 2007 15:47:02 -0300, rave247 rave247 <rave247 at seznam.cz>  
escribi?:

> If I could use os.getcwd() or save the value to some variable before  
> calling os.chdir() I would do it, believe me. However I can't because it  
> is the part of code where I can't do any changes.
>
> Also I do not agree that such thing is not possible because after python  
> script finishes its work, it naturally gets back into the original  
> location from where you started the script (in shell you are in the  
> original location after script finishes). So this information has to be  
> stored somewhere (probably in shell which runs the interpreter) and  
> there *must*  be a way how to get it. Simply after calling os.chdir()  
> the original value doen't disappear, I think it just needs some nice  
> hack if python doesn't provide a way how to get it.

The "current directory" is a per-process attribute managed by the OS.
This is the greatest way to successfully remember the previous directory  
in a step by step recipe:

  - Setup a web service in a trusted server exposing an object implementing  
a queue-like interfase. Ensure your application has the right permissions  
to access the web service (you may have to open a port thru the firewall).  
This part is up to you. The poor man's solution is to use a  
SimpleXMLRPCServer daemon - that might be enough for starting, good  
because it's a full-Python solution but does not scale very well.

  - You will need a unique identifier. See this wikipedia article for some  
info <http://en.wikipedia.org/wiki/Globally_Unique_Identifier>. I'll  
assume you have a CreateGuid() function available (on Windows you can  
install the pywin32 package, get it from sourceforge). (A pid is not  
enough for use in a global service like this).

  - A few lines of code. Save as remember.py anywhere on your Python path  
(maybe lib/site-packages)

<code>
 from xmlrpclib import ServerProxy

class Rememberer(object):

	_guid = _proxy = _queue = None

	def __init__(self, proxy_url):
             self.proxy_url = proxy_url

         def get_guid(self)
             "A GUID to to identify this rememberer"
             if self._guid is None:
                 self._guid = CreateGuid()
             return self._guid
         guid = property(get_guid)

         def get_proxy(self)
             "xmlrpc proxy"
             if self._proxy is None:
                 self._proxy = ServerProxy(self.proxy_url)
             return self._proxy
         proxy = property(get_proxy)

         def get_queue(self)
             """A queue object in the remote server, identified by  
self.guid"""
             if self._queue is None:
                 self._queue = self.proxy.Queue(self.guid)
         queue = property(get_queue)

         def push(self, value):
             self.queue.push(value)

         def peek(self):
             return self.queue.peek()

         def make_remember(self, function, what_to_remember):
             @functools.wraps(function)
             def inner(*args, **kw):
                 self.push(what_to_remember())
                 function(*args, **kw)
             return inner
</code>

  - The rememberer is globally accesible thru your url. You can use it with  
any process you wish, from anywhere in the world. Just make sure your GUID  
creator is good enough - as said on this recent post  
<http://groups.google.com/group/comp.lang.python/msg/76e25141b9963dfb>,  
you should arrange things to wait some time at system startup until the  
system has collected enough bits of entropy to generate a good identifier.

  - We are almost ready! The crucial part is to replace os.chdir with a  
wrapped version:

<code>
import os, remember
rememberer = remember.Rememberer("your.server.url")
replacements = dict(chdir = ('make_remember', (os.chdir, os.getcwd)),
                     prevdir = ('peek', None))
for attr, (fn, args) in replacements.iteritems():
     if args:
         value = getattr(rememberer, fn)(*args)
     else:
         value = getattr(rememberer, fn)
     setattr(os, attr, value)
</code>

Do that as early as possible; I'd put those lines in lib/sitecustomize.py  
(create that file if not already there). See  
http://docs.python.org/lib/module-site.html for info on the Python  
initialization sequence.

  - Now, you have a new function os.prevdir() which returns the directory  
that was current before the last call to os.chdir. The global web service  
holds a full stack of all the previous dirs, and you can extend the  
interfase to retrieve any value if you wish. Just remember the GUID used  
or you won't be able to retrieve anything.

  - Some bits are left as an exercise: there is no provision to remove  
items from the queue, no security enforced, and it's not thread safe (is  
it?).

  - The above code is untested, has no guarantees, standard disclaimers  
apply, use at your own risk, etc... Moreover, since all that mess can be  
replaced by a simple line like:
original_dir = os.getcwd()
or something similar near the top of your script, I would not even  
*attempt* to use it...

-- 
Gabriel Genellina

PS: Sorry! Could not resist...



From erik at myemma.com  Tue Sep 25 11:01:45 2007
From: erik at myemma.com (Erik Jones)
Date: Tue, 25 Sep 2007 10:01:45 -0500
Subject: Confused about 'positive lookbehind assertion'
In-Reply-To: <496954360709241938k6baf1009gc7cab215ad16b12f@mail.gmail.com>
References: <496954360709241938k6baf1009gc7cab215ad16b12f@mail.gmail.com>
Message-ID: <C087D3A6-FFB6-4AAD-B926-3C52AE3B01F6@myemma.com>


On Sep 24, 2007, at 9:38 PM, Robert Dailey wrote:

> Hi,
>
> I've been reading the python documentation on 'positive lookbehind  
> assertion' and I don't understand at all how it works. The python  
> docs give the following example:
>
> " (?<=abc)def will find a match in "abcdef", since the lookbehind  
> will back up 3 characters and check if the contained pattern matches."
>
> Can anyone emphasize more on what this RE operation does? Thanks.


Have you actually tried it out?

 >>> import re
 >>> r = re.compile(r'(?<=abc)def')
 >>> m1 = r.search('aaaabcdeffff')
 >>> m1.group()'def'
'def'
 >>> m2 = r.search('bcdefff')
 >>> m2 == None
True

So, it matches 'def' but only if it is immediately preceded by 'abc'.

Erik Jones

Software Developer | Emma?
erik at myemma.com
800.595.4401 or 615.292.5888
615.292.0777 (fax)

Emma helps organizations everywhere communicate & market in style.
Visit us online at http://www.myemma.com




From rjagodic at gmail.com  Mon Sep 24 11:48:07 2007
From: rjagodic at gmail.com (Ratko)
Date: Mon, 24 Sep 2007 15:48:07 -0000
Subject: Can a base class know if a method has been overridden?
In-Reply-To: <46f7d897$0$25150$426a74cc@news.free.fr>
References: <1190647436.423328.217670@w3g2000hsg.googlegroups.com>
	<46f7d897$0$25150$426a74cc@news.free.fr>
Message-ID: <1190648887.051630.168520@r29g2000hsg.googlegroups.com>

> If your use case is to make sure a given ('abstract') method has been
> overriden, the canonical solution is to raise NotImplementedError in the
> base class's implementation

I am not really interested in forcing the subclass to implement a
method. I am interested in knowing *whether* it did implement it or
not.


> Else, this may be possible using a custom metaclass (or possibly just
> specializing the __new__ method), but there may be better solutions
> (depending on what you're really trying to do)..

I have a base class EvtHandler that has methods defined to handle
certain events. You then subclass from EvtHandler and override the
methods for the events you want to receive. If a method has been
overridden, the base class will automatically register for those
events to make sure that they are even delivered to this handler
(which is why I would need to know whether a method has been
overridden or not). Of course, there are other ways of doing this
which would require a bit more work from the subclass... I just
thought this would be a neat "automatic" way of registering for
events.

For example:

class EvtHandler:
    def __init__(self):
        if onKey is overridden:
             register_for_key_events()

    def onKey(self):
        pass


class MyHandler(EvtHandler):
    def onKey(self):
        # do something here....



From kw at codebykevin.com  Fri Sep 14 09:42:14 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Fri, 14 Sep 2007 09:42:14 -0400
Subject: Install Mac OS X - Idle doesn't show up
In-Reply-To: <mailman.530.1189773306.2658.python-list@python.org>
References: <mailman.530.1189773306.2658.python-list@python.org>
Message-ID: <46EA8FB6.4040405@codebykevin.com>

Dominique wrote:
> Hello,
> 
> Sorry bothering you with such a trivial problem.
> 
> I installed python on a new mac at office.
> It seems everything is fine: in the console, I access to python.
> But I just can't start Idle. It seems to open but closes immediately (it appears
> in the dock and closes immediately).
> It is also impossible to open any .py file.
> 
> I am sure some of you have a good idea of what to do (path,...).
> 
> Thanks in advance
> Dominique
> 
How did you install/build Python? On the Mac, you really aren't supposed 
to start it from the terminal unless you are running it under X11 or are 
using a non-framework build. If you built it the standard Mac way, or if 
you use the binary installer from python.org, Idle is installed in 
/Applications/MacPython 2.5. Look there, and you should be able to drag 
the Idle icon to the dock.

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


From rjagodic at gmail.com  Mon Sep 24 11:23:56 2007
From: rjagodic at gmail.com (Ratko)
Date: Mon, 24 Sep 2007 15:23:56 -0000
Subject: Can a base class know if a method has been overridden?
Message-ID: <1190647436.423328.217670@w3g2000hsg.googlegroups.com>

Hi all,

I was wondering if something like this is possible. Can a base class
somehow know if a certain method has been overridden by the subclass?
I appreciate any ideas.
Thanks,

Ratko



From bj_666 at gmx.net  Sat Sep 22 02:26:39 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 22 Sep 2007 06:26:39 GMT
Subject: Would Anonymous Functions Help in Learning Programming/Python?
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<46f45f02$0$15350$4c368faf@roadrunner.com>
Message-ID: <5ljqsvF8gic1U1@mid.uni-berlin.de>

On Fri, 21 Sep 2007 19:52:41 -0400, Carl Banks wrote:

> First of all, let me say that I think "functions as first class data" is 
> helpful, but not crucial, to programming in Python, and there are many 
> people who simply don't need the lesson.  Especially someone like an 
> engineer (in the classical sense), who isn't building versatile software 
> packages, won't need to resort to functional programming much.

Of course you don't *need* functional programming as in "there's no way
around it", but why are engineers such an exception!?  I find the stuff in
`itertools` very handy when it comes to filter, manipulate, group and
aggregate data from large log files in ad hoc scripts.  I'm not an
engineer but I guess there are similar tasks with log files or measurement
results.

> For straightforward tasks, like sorting lists with a custom ordering, 
> functional progamming merely a convenience, and can be done without.

``for`` loops are just a convenience, you can do without.  ;-)

Ciao,
	Marc 'BlackJack' Rintsch


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Sep 13 14:59:06 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 13 Sep 2007 20:59:06 +0200
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<5ksoaoF5am8cU1@mid.individual.net>
	<1189701793.466307.93210@g4g2000hsf.googlegroups.com>
Message-ID: <5ktfjqF5ctrvU2@mid.individual.net>

TheFlyingDutchman wrote:
> Here's a FAQ item where they refer to it as I think Python should
> have done it - a special predefined variable:

Maybe. Personally, I like it the way it is in Python.

Why don't you make a preprocessor which accepts method declarations
without "self" and fixes them?

Regards,


Bj?rn

-- 
BOFH excuse #135:

You put the disk in upside down.



From ebgssth at gmail.com  Mon Sep 17 01:08:46 2007
From: ebgssth at gmail.com (js)
Date: Mon, 17 Sep 2007 14:08:46 +0900
Subject: A short question about non-ascii characters in list
Message-ID: <a23effaf0709162208l1e05d542m4acbac22c1503e39@mail.gmail.com>

>>> print u"???"
???
>>> print [u"???"]
[u'\xe4\xf6\xfc']

Python seems to treat non-ASCII chars in a list differently from the
one in the outside of a list.
I think this behavior is so inconvenient and actually makes debugging
work harder.

Is this an intentional? Is there any doc discussing about this?

Thanks.


From adurdin at gmail.com  Tue Sep 25 18:01:06 2007
From: adurdin at gmail.com (Andrew Durdin)
Date: Tue, 25 Sep 2007 23:01:06 +0100
Subject: Confused about 'positive lookbehind assertion'
In-Reply-To: <1190753752.126335.205410@o80g2000hse.googlegroups.com>
References: <496954360709241938k6baf1009gc7cab215ad16b12f@mail.gmail.com>
	<mailman.1049.1190732512.2658.python-list@python.org>
	<1190753752.126335.205410@o80g2000hse.googlegroups.com>
Message-ID: <59e9fd3a0709251501o2102200fl1d137395d645aadf@mail.gmail.com>

On 9/25/07, Karthik Gurusamy <kar1107 at gmail.com> wrote:
>
> Any idea what this positive lookbehind achieves which can't be done
> without it.
> I remember cases where positive look-ahead is useful.
>
> In the above example, r.search('abcdef') does the job of ensuring
> 'def' is preceded by 'abc'.

AFAICT the only benefit I can see is that the lookbehind isn't
captured, so (a) it's not included in match.group(n), and (b)
match.start(), match.end(), and match.span() return the offsets of the
bit you actually wanted to capture.

OTOH, I often find the negative lookbehind (?!...) very useful indeed.

Andrew


From joel.hedlund at gmail.com  Wed Sep 26 08:56:31 2007
From: joel.hedlund at gmail.com (Joel Hedlund)
Date: Wed, 26 Sep 2007 14:56:31 +0200
Subject: Test-driven development and code size
In-Reply-To: <87ejgmmgc2.fsf_-_@benfinney.id.au>
References: <fdai0b$7iv$1@news.lysator.liu.se>
	<5ls95aF9pq3gU1@mid.uni-berlin.de>
	<mailman.1054.1190736712.2658.python-list@python.org>
	<fdborn$h5q$1@news.lysator.liu.se>
	<87ejgmmgc2.fsf_-_@benfinney.id.au>
Message-ID: <fddcnp$sn9$1@news.lysator.liu.se>

> test-driven development merely means that you take that test case and
> *keep it* in your unit test. Then, once you're assured that you will
> find the bug again any time it reappears, go ahead and fix it.

My presumption has been that in order to do proper test-driven development I would have to make enormous test suites covering all bases for my small hacks before I could getting down and dirty with coding (as for example in http://www.diveintopython.org/unit_testing). This of course isn't very appealing when you need something done "now". But if I understand you correctly, if I would formalize what little testing I do, so that I can add to a growing test suite for each program as bugs are discovered and needs arise, would you consider that proper test-driven development? (or rather, is that how you do it?)

Thanks for taking the time!
/Joel


From anitnair at gmail.com  Wed Sep  5 01:03:52 2007
From: anitnair at gmail.com (AniNair)
Date: Tue, 04 Sep 2007 22:03:52 -0700
Subject: REGULAR EXPRESSION
In-Reply-To: <mailman.55.1188948935.2658.python-list@python.org>
References: <1188912767.360967.306050@y42g2000hsy.googlegroups.com>
	<fbjnc1$i8b$1@sea.gmane.org>
	<mailman.55.1188948935.2658.python-list@python.org>
Message-ID: <1188968632.077355.199740@y42g2000hsy.googlegroups.com>

On Sep 5, 4:35 am, Ricardo Ar?oz <ricar... at gmail.com> wrote:
> Steve Holden wrote:
> > AniNair wrote:
> >> hi.. I am trying to match '+ %&/-' etc using regular expression  in
> >> expressions like 879+34343. I tried \W+   but it matches only in the
> >> beginning of the string Plz help Thanking you in advance...
>
> > Perhaps you could give a few example of strings that should and
> > shouldn't match? It isn't clear from your description what pattern you
> > are trying to find.
>
> > regards
> >   Steve
>
> If it's operations between two numbers try :
> r'([\d.]+?)\s*([-+/*%&])([\d.]+)'
> It will give you 3 groups, first number, operation and second number
> (caveat emptor).


Hi.. Thanks alot for finding time to help a beginner like me. What I
am trying to do is validate the input i get. I just want to take
numbers and numbers only. So if the input is 23+1 or 2/3 or 9-0 or
7/0 , I want to find it using reg exp. I know there are other ways to
do this... but i thought i will try this as i need to learn reg exp. I
tried \D+   ,   \W+,  and \D+|\W+ .. Thanks once again...



From semenick at ix.netcom.com  Fri Sep 14 10:00:23 2007
From: semenick at ix.netcom.com (PaulS)
Date: Fri, 14 Sep 2007 10:00:23 -0400
Subject: where is help file?
Message-ID: <13el4vvna6jildc@corp.supernews.com>

new to Fedora7, typed python in interactive interpreter, then help().  Then 
modules to get a list of modules.  Then module name to get info on a module 
but no help file.  What is the help file name?  Is there an environmental 
variable I have to set?  Thanks,
Paul 




From grante at visi.com  Sat Sep 22 19:00:32 2007
From: grante at visi.com (Grant Edwards)
Date: Sat, 22 Sep 2007 23:00:32 -0000
Subject: Getting rid of bitwise operators in Python 3?
References: <46f49740$0$32514$4c368faf@roadrunner.com>
	<13f99fediasg3ae@corp.supernews.com>
	<46f4c171$0$26367$4c368faf@roadrunner.com>
	<13fa49vie86ii1d@corp.supernews.com>
	<46f57841$0$15333$4c368faf@roadrunner.com>
Message-ID: <13fb7kglt7har66@corp.supernews.com>

On 2007-09-22, Carl Banks <pavlovevidence at gmail.com> wrote:
> On Sat, 22 Sep 2007 12:57:35 +0000, Grant Edwards wrote:
>> On 2007-09-22, Carl Banks <pavlovevidence at gmail.com> wrote:
>>> Of course it would be.  The reason I mention it is that automatic
>>> convertibility is a key factor in whether a change can make it into
>>> Python 3.
>> 
>> It matters not whether fugly code is automatically generated or manually
>> generated.  It's still hard to read and maintain.
>
> By my understanding, it really doesn't matter that much.
>
> The transition tool's purpose is to allow a subset of 2.x code to run on 
> 3.x, so that developers don't have to maintain separate codebases to 
> support both.  The 3.x code that is produced isn't intended to be read or 
> maintained.  So no big deal if it's a little ugly.

Eh?  If you remove bitwise operators, then doing bitwise
operations is going to be ugly, hard to write, and hard to read
and maintain.  I don't see what 2.x vs. 3.x vs. a "transition
tool" has to do with it.

-- 
Grant Edwards                   grante             Yow!  People humiliating
                                  at               a salami!
                               visi.com            


From jipksaman at gmail.com  Mon Sep 24 03:48:45 2007
From: jipksaman at gmail.com (abdo911)
Date: Mon, 24 Sep 2007 00:48:45 -0700
Subject: the AIM of LIFE
Message-ID: <1190620125.417804.275690@g4g2000hsf.googlegroups.com>


Allow me to share with you here some information about the AIM of
LIFE .
What is your purpose in life? What is the rationale behind our life?
Why do we live in this life? These questions frequently intrigue
people who try to find accurate answers.
People provide different answers to these questions. Some people
believe the purpose of life is to accumulate wealth. But one may
wonder: What is the purpose of life after one has collected colossal
amounts of money? What then? What will the purpose be once money is
gathered? If the purpose of life is to gain money, there will be no
purpose after becoming wealthy. And in fact, here lies the problem of
some disbelievers or misbelievers at some stage of their life, when
collecting money is the target of their life. When they have collected
the money they dreamt of, their life loses its purpose. They suffer
from the panic of nothingness and they live in tension and
restlessness.
Can Wealth Be an Aim?
We often hear of a millionaire committing suicide, sometimes, not the
millionaire himself but his wife, son, or daughter. The question that
poses itself is: Can wealth bring happiness to one's life? In most
cases the answer is NO. Is the purpose of collecting wealth a standing
purpose? As we know, the five-year old child does not look for wealth:
a toy for him is equal to a million dollars. The eighteen-year old
adolescent does not dream of wealth because he is busy with more
important things. The ninety-year old man does not care about money;
he is worried more about his health. This proves that wealth cannot be
a standing purpose in all the stages of the individual's life.
Wealth can do little to bring happiness to a disbeliever, because he/
she is not sure about his fate. A disbeliever does not know the
purpose of life. And if he has a purpose, this purpose is doomed to be
temporary or self destructive.
What is the use of wealth to a disbeliever if he feels scared of the
end and skeptical of everything. A disbeliever may gain a lot of
money, but will surely lose himself.
Worshipping Allah as an Aim
On the contrary, faith in Allah gives the believer the purpose of life
that he needs. In Islam, the purpose of life is to worship Allah. The
term "Worship" covers all acts of obedience to Allah.
The Islamic purpose of life is a standing purpose. The true Muslim
sticks to this purpose throughout all the stages of his life, whether
he is a child, adolescent, adult, or an old man.
Worshipping Allah makes life purposeful and meaningful, especially
within the framework of Islam. According to Islam this worldly life is
just a short stage of our life. Then there is the other life. The
boundary between the first and second life is the death stage, which
is a transitory stage to the second life. The type of life in the
second stage a person deserves depends on his deeds in the first life.
At the end of the death stage comes the day of judgment. On this day,
Allah rewards or punishes people according to their deeds in the first
life.
The First Life as an Examination
So, Islam looks at the first life as an examination of man. The death
stage is similar to a rest period after the test, i. e. after the
first life. The Day of Judgment is similar to the day of announcing
the results of the examinees. The second life is the time when each
examinee enjoys or suffers from the outcome of his behavior during the
test period.
In Islam, the line of life is clear, simple, and logical: the first
life, death, the Day of Judgment, and then the second life. With this
clear line of life, the Muslim has a clear purpose in life. The Muslim
knows he is created by Allah. Muslims know they are going to spend
some years in this first life, during which they have to obey God,
because God will question them and hold them responsible for their
public or private deeds, because Allah knows about all the deeds of
all people. The Muslim knows that his deeds in the first life will
determine the type of second life they will live in. The Muslim knows
that this first life is a very short one, one hundred years, more or
less, whereas the second life is an eternal one.
The Eternity of the Second Life
The concept of the eternity of the second life has a tremendous effect
on a Muslims during their first life, because Muslims believe that
their first life determines the shape of their second life. In
addition, this determines the shape of their second life and this
determination will be through the Judgment of Allah, the All just and
Almighty.
With this belief in the second life and the Day of Judgment, the
Muslim's life becomes purposeful and meaningful. Moreover, the
Muslim's standing purpose is to go to Paradise in the second life.
In other words, the Muslim's permanent purpose is to obey Allah, to
submit to Allah, to carry out His orders, and to keep in continues
contact with Him through prayers (five times a day), through fasting
(one month a year), through charity (as often as possible), and
through pilgrimage (once in one's life).
The Need for a Permanent Purpose
Disbelievers have purposes in their lives such as collecting money and
property, indulging in sex, eating, and dancing. But all these
purposes are transient and passing ones. All these purposes come and
go, go up and down. Money comes and goes. Health comes and goes.
Sexual activities cannot continue forever. All these lusts for money,
food and sex cannot answer the individual's questions: so what? Then
What?
However, Islam saves Muslims from the trouble of asking the question,
because Islam makes it clear, from the very beginning, that the
permanent purpose of the Muslim in this life is to obey Allah in order
to go to Paradise in the second life.
We should know that the only way for our salvation in this life and in
the hereafter is to know our Lord who created us, believe in Him, and
worship Him alone.
We should also know our Prophet whom Allah had sent to all mankind,
believe in Him and follow Him. We should, know the religion of truth
which our Lord has commanded us to believe in, and practice it ...
Those in search of truth
Who have an open mind and heart,
Islamic Education Foundation
Welcome You.
Objectives: -
To Convey the message of Islam
To Educate Muslims about Islam
To keep in close contact with new Muslims.
Activities:
Offering Courses and presenting lectures about Islam in several
languages.
Teaching Islam and Arabic.
Teaching new Muslims to receive the Holy Quran.
Helping Non- Muslims embrace Islam and complete the required
procedures
I advise you visiting :
http://www.islam-guide.com/
http://www.thetruereligion.org/
http://www.beconvinced.com/
http://www.plaintruth.org/
http://english.islamway.com/
http://www.todayislam.com/
http://www.prophetmuhammed.org/
http://www.islamtoday.net/english/
http://www.islamunveiled.org/
http://www.islamic-knowledge.com/



From kyosohma at gmail.com  Fri Sep  7 09:35:58 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 07 Sep 2007 13:35:58 -0000
Subject: Finding specific date ranges
In-Reply-To: <mailman.208.1189151218.2658.python-list@python.org>
References: <1189090603.285778.282060@g4g2000hsf.googlegroups.com>
	<1189122086.388859.146670@r34g2000hsd.googlegroups.com>
	<mailman.208.1189151218.2658.python-list@python.org>
Message-ID: <1189172158.598849.226000@o80g2000hse.googlegroups.com>

On Sep 7, 2:47 am, Tim Golden <m... at timgolden.me.uk> wrote:
> Zentrader wrote:
> > On Sep 6, 7:56 am, kyoso... at gmail.com wrote:
> >> December 31, 2006    January 13, 2007 # doesn't earn
> >> January 14, 2007        January 27, 2007 # does earn
> >> January 28, 2007        February 10, 2007 # doesn't
> >> February 11, 2007       February 24, 2007 # does
>
> > Am I over simplifying if I say that since it appears to be a two week
> > pay period, the date has to be greater than the 11th unless the first,
> > or first and second, are on a weekend, in which case it would be > 12
> > or > 13?  Or a reasonable facsimile thereof, depending on whether or
> > not the two week period is Saturday through Friday.
>
> I think it's one of those things where the neatest answer
> could well depend on the sort of heuristic you mention. As
> a rule, when I come across this kind of requirement, I tend
> to put the most general solution in place, unless a *real*
> optimisation is clearly called for. In my experience, this
> makes it much easier for the next person who looks at the
> code, typically years later, even if that's me!
>
> (This is has just happened to me this week, having to review
> a date-related calculation to do the repost frequency of the
> adverts my company deals with. I wrote the original code five
> years ago, and commented it intelligently, but I *still* had
> to work through the code twice when we had a problem with a
> particular cycle!)
>
> TJG

I think it's foolish NOT to comment code unless it's very well self-
documented. Even then, a couple lines of comments can be helpful. I've
had to translate a bunch of Kixtart code into Python and none of it
was commented and it wasn't well formed code either.

And I've had the same thing happen with code that's only a year old.
I'll read it and then go "what the?!" It's just not possible to
remember every line of code you write. I wish it was.

Mike



From sergio.correia at gmail.com  Mon Sep  3 19:13:43 2007
From: sergio.correia at gmail.com (Sergio Correia)
Date: Mon, 3 Sep 2007 18:13:43 -0500
Subject: Can you use -getattr- to get a function in the current module?
Message-ID: <f1aa6d810709031613r74fc74f0ub9efcc3e4f3b26c1@mail.gmail.com>

This works:

# Module spam.py

import eggs

print getattr(eggs, 'omelet')(100)

That is, I just call the function omelet inside the module eggs and
evaulate it with the argument 100.

But what if the function 'omelet' is in the module where I do the
getattr (that is, in spam.py).  If I do any of this

print getattr(spam, 'omelet')(100)
print getattr('','omelet')(100)
print getattr('omelet')(100)

It wont work. Any ideas?

Thanks,
Sergio


From ncoghlan at gmail.com  Mon Sep 24 10:59:14 2007
From: ncoghlan at gmail.com (NickC)
Date: Mon, 24 Sep 2007 07:59:14 -0700
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <46f79c75$0$30457$426a34cc@news.free.fr>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<Bgv*HjvVr@news.chiark.greenend.org.uk>
	<46f79c75$0$30457$426a34cc@news.free.fr>
Message-ID: <1190645954.381931.187210@y42g2000hsy.googlegroups.com>

On Sep 24, 9:16 pm, Bruno Desthuilliers <bruno.
42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> Matthew Woodcraft a ?crit :
> > One reason for the different syntax is that functions, unlike most
> > other objects, know their own names (which can be shown in tracebacks
> > and the like).
>
> Nope. They know *one* of their names - the one they've been given when
> first instanciated. Which may or not be the name used to get at them...

That's exactly the point - a function may be given many names through
the assignment statement, just like any other data value. However, the
*first* name given to a function (the one in the def statement) is
special, as that is the name the function knows *itself* by.

While a function *can* be treated like any other piece of data once
you have a reference to one, the original statement does a lot more
than a normal assignment does:
  - being within the scope of a function significantly alters name
binding and lookup
  - return statements and yield statements are meaningful only within
the scope of a function
  - you can attach decorators to a function definition
  - you can include a docstring in a function definition

For the original poster, I suggest trying some of the other
suggestions in this thread, where you skip the def statement and
instead look at manipulating standard library functions like math.sin
and math.cos. Using a dictionary to select a function to run may be a
good trick to illustrate the usefulness of this technique (e.g.
passing in a command line argument to choose a function to call to
generate a test sequence)



From akm at theinternet.com.au  Fri Sep 28 11:38:17 2007
From: akm at theinternet.com.au (Andrew Milton)
Date: Sat, 29 Sep 2007 01:38:17 +1000
Subject: [Zope] how do I test for the current item in an iteration
In-Reply-To: <005b01c801e5$600ad3c0$0200a8c0@design4>
References: <005b01c801e5$600ad3c0$0200a8c0@design4>
Message-ID: <20070928153817.GI4840@camelot.theinternet.com.au>

+-------[ kamal hamzat ]----------------------
| Dear All,
| 
| I have this error after i added the if statement

Time for you to do some reading of your own.

That's three in less than an hour...

-- 
Andrew Milton
akm at theinternet.com.au


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Sep  7 03:42:37 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 07 Sep 2007 09:42:37 +0200
Subject: why should I learn python
In-Reply-To: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
Message-ID: <46e100e7$0$16831$426a34cc@news.free.fr>

windandwaves a ?crit :
> Can someone tell me why I should learn python? 

Really, I cannot see any reason why you should do such a thing.

> I am a webdeveloper,

I've seen this label is applied to a wide range of effective jobs, from 
"building static web pages with a WYSWIG editor not even knowing html" 
to "writing a full-blown web application server".

> but I often see Python mentioned and I am curious to find out what I
> am missing out on.

One of the best programming languages around, suitable for almost 
anything except low-level stuff (system, drivers etc).


From DouhetSukd at gmail.com  Fri Sep 14 03:47:31 2007
From: DouhetSukd at gmail.com (DouhetSukd at gmail.com)
Date: Fri, 14 Sep 2007 00:47:31 -0700
Subject: "once" assigment in Python
In-Reply-To: <1189750616.597409.85380@w3g2000hsg.googlegroups.com>
References: <1189750616.597409.85380@w3g2000hsg.googlegroups.com>
Message-ID: <1189756051.834305.120500@w3g2000hsg.googlegroups.com>

Agree that what you are looking for may not be a good idea.  So make
sure you don't shoot yourself in the foot with it.  You should
probably look into your problem some more.

>>> def once(obj,attrname,value):
... 	if hasattr(obj,attrname):
... 		return
... 	else:
... 		setattr(obj,attrname,value)
...
>>> class Foo:
... 	pass
...
>>> foo = Foo()
>>> once(foo,"a",1)
>>> foo.a
1
>>> once(foo,"b",2)
>>> foo.a
1
>>> def m1(self):
... 	print "i am m1"
...
>>> def m2(self):
... 	print "i am m2"
...
>>> once(Foo,"mx",m1)
>>> foo.mx()
i am m1
>>> once(Foo,"mx",m2)
>>> foo.mx()
i am m1
>>>

This is very generic code, but you could make it specific to a class
and an attribute.  If so look into properties.

class Foo2:

  def _setMyAttr(self,value):
     if hasattr(self,"_myAttr"):
       return
     self._myAttr = value

  def _getMyAttr(self):
     if not hasattr(self,"_myAttr"):
        return "somedefaultvalue"
     return self._myAttr

  myAttr = property(_getMyAttr,_setMyAttr)

Note also :  stay away from __setattr__ until you know what you are
doing and
you know when to use self.__dict__ assignments.  Painful personal
experiences for me.



From paddy3118 at googlemail.com  Wed Sep  5 16:28:17 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Wed, 05 Sep 2007 13:28:17 -0700
Subject: Text processing and file creation
In-Reply-To: <1189008809.718361.45790@g4g2000hsf.googlegroups.com>
References: <1189008809.718361.45790@g4g2000hsf.googlegroups.com>
Message-ID: <1189024097.175349.221210@w3g2000hsg.googlegroups.com>

On Sep 5, 5:13 pm, "malibus... at gmail.com" <malibus... at gmail.com>
wrote:
> I have a text source file of about 20.000 lines.>From this file, I like to write the first 5 lines to a new file. Close
>
> that file, grab the next 5 lines write these to a new file... grabbing
> 5 lines and creating new files until processing of all 20.000 lines is
> done.
> Is there an efficient way to do this in Python?
> In advance, thanks for your help.

If its on unix: use split.
If its your homework: show us what you have so far...

- Paddy.



From marco at yafd.de  Sun Sep 16 06:46:43 2007
From: marco at yafd.de (Marco)
Date: Sun, 16 Sep 2007 12:46:43 +0200
Subject: Free Python Ebook
In-Reply-To: <1189932765.100822.82720@r29g2000hsg.googlegroups.com>
References: <1189932765.100822.82720@r29g2000hsg.googlegroups.com>
Message-ID: <46ED0993.5090604@yafd.de>

Hi George,

 > Please tell me from which website I will get the free Python Ebook.
which one do you mean?

I only know this one:
http://diveintopython.org

Bye,
Marco

PS: Sorry, hit the wrong button the first time ;-)


From bg_ie at yahoo.com  Mon Sep 10 05:28:57 2007
From: bg_ie at yahoo.com (bg_ie at yahoo.com)
Date: Mon, 10 Sep 2007 02:28:57 -0700
Subject: Enum class with ToString functionality
Message-ID: <1189416537.050002.61120@r34g2000hsd.googlegroups.com>

Hi,

I have the following class -

class TestOutcomes:
    PASSED = 0
    FAILED = 1
    ABORTED = 2

plus the following code -

testResult = TestOutcomes.PASSED

testResultAsString
if  testResult == TestOutcomes.PASSED:
    testResultAsString = "Passed"
elif testResult == TestOutcomes.FAILED :
    testResultAsString = "Failed"
else:
    testResultAsString = "Aborted"

But it would be much nicer if I had a function to covert to string as
part of the TestOutcomes class. How would I implement this?

Thanks,

Barry



From mensanator at aol.com  Mon Sep 17 01:55:02 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: Sun, 16 Sep 2007 22:55:02 -0700
Subject: Try this
In-Reply-To: <mailman.634.1189996018.2658.python-list@python.org>
References: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>
	<13eqsdfsfvsa16f@corp.supernews.com>
	<1189969529.652871.19280@50g2000hsm.googlegroups.com>
	<mailman.621.1189970593.2658.python-list@python.org>
	<1189979679.969074.216490@y42g2000hsy.googlegroups.com>
	<1189981681.745195.18130@y42g2000hsy.googlegroups.com>
	<1189983233.709832.124290@19g2000hsx.googlegroups.com>
	<1189984913.956999.163100@n39g2000hsh.googlegroups.com>
	<1189990689.259451.232570@g4g2000hsf.googlegroups.com>
	<mailman.634.1189996018.2658.python-list@python.org>
Message-ID: <1190008502.986300.286280@22g2000hsm.googlegroups.com>

On Sep 16, 9:27?pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Sun, 16 Sep 2007 21:58:09 -0300, mensana... at aol.com  
> <mensana... at aol.com> escribi :
>
> >> I'm eagerly awaiting publication of your professional specification
> >> for correctly detecting the encoding of an arbitrary stream of
> >> bytes
>
> > The very presence of an algorithm to detect encoding is a bug.
> > Files with they .txt extension should always be treated as ANSI
> > even if they contain binary data.
>
> Why ANSI?

Because that's the absence of encoding?

> Because it's convenient to *you*?

No, it's ANSI unless told otherwise.

> What about the rest of the world that don't speak
> English or even worse, don't use the Latin alpabet?

When the rest of the world creates the next
generation of computers, THEY can chosse the
defaults.

> What do you mean by "binary data"?

8-bit, ASCII is only 7-bit.

> Notepad is not interpreting the file as  
> "binary", it's text,

And will treat non-ASCII data as if it were ASCII.

> but interpreted using the wrong encoding.

So that's not a serious bug? To decide that a file
is Unicode despite the absence of the appropriate
markers?

>
> If you want to understand what happens here: The Unicode block for 'CJK  
> Unified Han' goes from U+4E00 to U+9FFF and is the largest block in the  
> basic plane, with more than 20000 code points. The previous block contains  
> the famous 64 hexagrams, and the previous block is 'CJK Unified Han  
> Extension A' ranging from U+3400 to U+4DBF.
> Note that ASCII letters go from 0x41-0x5A and 0x61-7A, and the range  
> 0x4100-0x7AFF is totally contained inside the above Unicode blocks.  
> Reading a small phrase containing only ASCII letters as it were in UTF16  
> would collapse each two letters into a single character, each character  
> being part of 'CJK Unified Han'. (Space and punctuation are allowed in odd  
> positions only, else the character would not belong to the Han blocks).
> As every character goes into the same code block the heuristics concludes  
> that the text is some Estern language encoded in UTF16.

But...but...Notepad doesn't have a UTF16 option.

> This is the "Well you are speed" phrase interpreted as UTF16:  
> u'\u6557\u6c6c\u7920\u756f\u6120\u6572\u7320\u6570\u6465'

How can you tell from that that it's UTF16? If there's
something stored in addition to those 18 bytes, you're
being misleading.

>
> > Notepad should never be
> > allowed to try to decide what the encoding is if the the open
> > dialog has the encoding set to ANSI.
>
> I'm using notepad.exe version 5.1.2600.2180 (XP SP2 fully updated) and  
> that's exactly what happens. I have to explicitely select Unicode in order  
> to see those Han characters.

So which is worse, you having to tell it that it's
Unicode or Notepad deciding on its own that a file
is Unicode when it isn't.

>
> --
> Gabriel Genellina




From grante at visi.com  Mon Sep  3 11:18:41 2007
From: grante at visi.com (Grant Edwards)
Date: Mon, 03 Sep 2007 15:18:41 -0000
Subject: How do I get triangles from a vtkPolyData object?
Message-ID: <13do9eh8dtqa236@corp.supernews.com>

I posted this question to the vtk mailing list last week:

  I've been Googling and wandering through the class references
  most of the afternoon, but I can't figure out how to get the
  triangles out of the vtkPolyData that vtkDelaunay2D produces?

  I can get the vertex corredinates like this:

    delny = vtk.vtkDelaunay2D()
    delny.SetInput(profile)
    delny.SetTolerance(0.001)
    delny.Update()

    o = delny.GetOutput()

    vertexes = [o.GetPoint(i) for i in xrange(o.GetNumberOfPoints())]

  I can see that there are 84 triangles, and 'o' is a vtkPolyData
  object that has 84 cells and 84 polygons, so they obviously
  represent the triangles, but I can't figure out how to get
  something useful out of the cells or polys.

I got multiple replies telling me that I need to make calls to
o.GetNextCell().  The posters were even kind enough to include
examples in C++ showing how to do a delaunay triangulation and
retrieve the triangle info.

However, the Python version of a vtkCellArray object (which is
what's created as output from the Delaunay triangulation
module) doesn't make the GetNextCell() (or GetCell()) method
visible. It does have a GetNumberOfCells() object, and methods
to set and insert cells, but how do I _get_ a cell?
  
-- 
Grant Edwards                   grante             Yow!  .. I'll make you
                                  at               an ASHTRAY!!
                               visi.com            


From horpner at yahoo.com  Thu Sep 13 12:01:48 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 13 Sep 2007 16:01:48 GMT
Subject: recursion
References: <fcbfnj$lh4$1@ss408.t-com.hr>
Message-ID: <slrnfeinvk.1cc.horpner@FIAD06.norwich.edu>

On 2007-09-13, Gigs_ <gigs at hi.t-com.hr> wrote:
> Can someone explain me this
>
> >>> def f(l):
> 	if l == []:
> 		return []
> 	else:
> 		return f(l[1:]) + l[:1]  # <= cant figure this, how is all sum at the end?

In plain English, the above program says:

The sum of the items in list l is zero if the list is empty.
Otherwise, the sum is the value of the first item plus the sum of
the rest of the items in the list.

Well, it would say that if it weren't somewhat buggy. l[:1]
doesn't evaluate to a number, but to a list containing one
number, so the above program doesn't do what you say it does.

It should read something like:

 def my_sum(seq):
   if len(seq) == 0:
     return 0
   else:
     return seq[0] + my_sum(seq[1:])

The tough part of recursion is the leap of faith required to
believe that it works. However, you can often use an inductive
proof of correctness to help obviate the faith.

Proof that my_sum(seq) computes the sum of the items in seq (this
proof is modeled on proofs written by Max Hailperin, Barbara
Kaiser, and Karl Knight, in _Concrete Abstractions_):

  Base case: my_sum(seq) terminates with value 0 when len(seq) is
  zero, because of the evaluation rules for if, len and ==.

  Induction hypothesis: Assume that my_sum(subseq) evaluates to
  the sum of all the items in subsequence of seq, where 0 <=
  len(subseq) < len(seq).

  Inductive step: Consider evaluating my_sum(seq) where the
  length of seq is greater than 0. This will terminate if
  my_sum(seq[1:]) terminates, and will have the value of seq[0] +
  my_sum(seq[1:]). Because seq[1:] evaluates to the subsequence of
  the rest of the items in seq (all except the first), and 0 <=
  len(subseq) < len(seq), we can assume by our induction
  hypothesis that my_sum(seq[1:]) does terminate, with a value
  equal to the sum of the the rest of the items in seq.
  Therefore, seq[0] + my_sum(seq[1:]) evaluates to seq[0] + the
  sum of all the items in seq[1:]. Because seq[0] + the sum of
  the rest of the items in seq equals the sum of all the items in
  seq, we see that my_sum(seq) does terminate with the correct
  value for any arbitrary length of seq, under the inductive
  hypothesis of correct operation for subsequences of seq.

  Conclusion: Therefore, by mathematical induction on the length
  of seq, my_sum(seq) terminates with the value of the sum of all
  the items in seq for any length of seq.

But really I prefer the first first plain English version. ;)

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


From steve at holdenweb.com  Tue Sep  4 09:25:38 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 04 Sep 2007 06:25:38 -0700
Subject: Setting Current Dir in Python
In-Reply-To: <46DD5135.7060501@scivisum.co.uk>
References: <000001c7eeec$d9341470$8b9c3d50$@net>
	<46DD5135.7060501@scivisum.co.uk>
Message-ID: <fbjmci$dig$1@sea.gmane.org>

Tim Couper wrote:
> "Non-ASCII character '\xef' in file"
> 
> SandhirFileMonitor.py on line 356, 
> 
> This is reason for the failure .. you have a (probably accidentally placed) non-ascii (ie whose value is > 128) character on line 356, whose hex value is ef (decimal 259) . Solution: find that line and remove the character - or line.
> 
Tim:

You should know that any two-digit hexadecimal number is less than 255!

 >>> int("ef", 16)
239

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From sjmachin at lexicon.net  Fri Sep 14 08:53:07 2007
From: sjmachin at lexicon.net (John Machin)
Date: Fri, 14 Sep 2007 05:53:07 -0700
Subject: recursion
In-Reply-To: <5kvbn3F5h7l3U1@mid.uni-berlin.de>
References: <fcbfnj$lh4$1@ss408.t-com.hr>
	<slrnfeinvk.1cc.horpner@FIAD06.norwich.edu>
	<mailman.491.1189700115.2658.python-list@python.org>
	<slrnfeit3k.1lg.horpner@FIAD06.norwich.edu>
	<fcdrv9$7lr$1@ss408.t-com.hr> <5kvbn3F5h7l3U1@mid.uni-berlin.de>
Message-ID: <1189774387.132173.282890@r29g2000hsg.googlegroups.com>

On Sep 14, 10:04 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Fri, 14 Sep 2007 13:40:17 +0200, Gigs_ wrote:
> > sorry i think that i express wrong. having problem with english
>
> > what i mean is how python knows to add all thing at the end of recursion
>
> Because you have written code that tells Python to do so.  ;-)
>
> >  >>> def f(l):
> >      if l == []:
> >          return []
> >      else:
> >          return f(l[1:]) + l[:1]
>
> > f([1,2,3])
>
> > recursion1   f([2,3]) + [1]
>
> > recursion2   f([3]) + [2]  or [2, 1]?
>
> > recursion3   f([]) + [3] or   [3, 2, 1]
>
> Both alternatives in recursion 2 and 3 are wrong.  You have to simply
> replace the function invocation by its result which gives:
>
>     f([1, 2, 3])
> r1  f([2, 3]) + [1]
> r2  f([3]) + [2] + [1]
> r3  f([]) + [3] + [2] + [1]
> r4  [] + [3] + [2] + [1]
>
> And now the calls return:
>
> r3  [3] + [2] + [1]
> r2  [3, 2] + [1]
> r1  [3, 2, 1]
>
> > i dont get all this
>
> >  >>> def f(l):
> >      if l == []:
> >    print l
> >          return []
> >      else:
> >          return f(l[1:]) + l[:1]
>
> >  >>> f([1,2,3])
> > []
> > [3, 2, 1]  # how this come here? how python save variables from each
> > recursion?
>
> There is not just one `l` but one distinct `l` in each call.
>

I reckon that what the OP wants is a simple explanation of how
function calls use a stack mechanism for arguments and local
variables, and how this allows recursive calls, unlike the good ol'
FORTRAN IV of blessed memory. Perhaps someone could oblige him?

I'd try but it's time for my beauty sleep :-)
<yawn>
Good night all
John



From exhuma at gmail.com  Tue Sep 18 03:33:11 2007
From: exhuma at gmail.com (exhuma.twn)
Date: Tue, 18 Sep 2007 00:33:11 -0700
Subject: super, apply, or __init__ when subclassing?
Message-ID: <1190100791.740269.62880@k79g2000hse.googlegroups.com>

This is something that keeps confusing me. If you read examples of
code on the web, you keep on seeing these three calls (super, apply
and __init__) to reference the super-class. This looks to me as it is
somehow personal preference. But this would conflict with the "There
one way to do it" mind-set.

So, knowing that in python there is one thing to do something, these
three different calls must *do* domething different. But what exactly
*is* the difference?

------------ Exampel 1: -----------------------------

class B(A):
   def __init__(self, *args):
      A.__init__(self, args)

------------ Exampel 2: -----------------------------

class B(A):
   def __init__(self, *args):
      apply( A.__init__, (self,) + args)

------------ Exampel 3: -----------------------------

class B(A):
   def __init__(self, *args):
      super(A,self).__init__(*args)



From Shawn at Milochik.com  Fri Sep  7 16:31:00 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Fri, 7 Sep 2007 16:31:00 -0400
Subject: Python and Cron
In-Reply-To: <a9f39a410709071214h69a22fbcnbc40fa3ecd7ac96c@mail.gmail.com>
References: <a9f39a410709071214h69a22fbcnbc40fa3ecd7ac96c@mail.gmail.com>
Message-ID: <2dc0c81b0709071331v1718c84bj4a0bdda2ef7b79af@mail.gmail.com>

Any chance your import statements aren't coming in properly due to
something in your environment in Python that's not being inherited by
your cron job?


From simon at brunningonline.net  Wed Sep 26 15:40:40 2007
From: simon at brunningonline.net (Simon Brunning)
Date: Wed, 26 Sep 2007 20:40:40 +0100
Subject: An Editor that Skips to the End of a Def
In-Reply-To: <5lv3nnFacvnmU1@mid.individual.net>
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk> <fd0au1$fro$1@lust.ihug.co.nz>
	<5lhs4pF8bkunU1@mid.individual.net> <fd4168$ige$1@lust.ihug.co.nz>
	<slrnfff9op.1is.horpner@FIAD06.norwich.edu>
	<fd9ncb$q3l$1@lust.ihug.co.nz>
	<slrnffhe9g.2db.hat@se-162.se.wtb.tue.nl>
	<fdcfci$brq$1@lust.ihug.co.nz> <5lv3nnFacvnmU1@mid.individual.net>
Message-ID: <8c7f10c60709261240j3e4b9df3w28f4265126d3d80b@mail.gmail.com>

On 9/26/07, Bjoern Schliessmann <usenet-mail-0306.20.chr0n0ss at spamgourmet.com>
> You definitely used the wrong languages :)
>
> http://worsethanfailure.com/Articles/The-Other-Kind-of-RPG.aspx

Ah, but one edits RPG with SEU[1], Undo - who needs it?

-- 
Cheers,
Simon B.
simon at brunningonline.net
[1] http://tinyurl.com/yvra7l


From zzbbaadd at aol.com  Fri Sep 28 16:18:41 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Fri, 28 Sep 2007 13:18:41 -0700
Subject: Python 3.0 migration plans?
In-Reply-To: <5m53aiFbfe3hU1@mid.uni-berlin.de>
References: <1191002679.569709.16870@22g2000hsm.googlegroups.com>
	<mailman.1242.1191003389.2658.python-list@python.org>
	<1191005906.556751.261940@22g2000hsm.googlegroups.com>
	<5m51l4Fbao07U2@mid.uni-berlin.de>
	<1191007754.740566.137510@n39g2000hsh.googlegroups.com>
	<5m53aiFbfe3hU1@mid.uni-berlin.de>
Message-ID: <1191010721.990414.303520@22g2000hsm.googlegroups.com>

On Sep 28, 12:34 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> TheFlyingDutchman wrote:
>
> >> Or bind resources of these pocket protectors that otherwise would lead to
> >> answers for people that do seek enlightment...
>
> > I don't think it would be correct to characterize my posts as not
> > seeking enlightenment. I do also happen to voice my opinion which
> > seems appropriate since this can be characterized as a discussion
> > group. It theoretically is possible for a discussion group to tolerate
> > opinions that diverge from the majority.
>
> I would characterize
>
> """
> I like how someone here characterized decorators - those silly @
> things. They remind me of Perl. Not adding keywords for abstract and
> static is like Perl not adding a keyword for class.
> """
>
> not as seeking enlightenment, but as pure trolling. Disqualifying features
> without actually understanding them as "silly" certainly doesn't lie on one
> of the many path's to enlightenment known man - which to my knowledge
> usually require more humble approaches....

Some posts seek enlightenment, some voice opinions. Opinions aren't
always voiced humbly. I don't think you will have to look far for
examples of people other than myself not expressing opinions humbly.

>
> > One issue I have with this group and that I encountered many years ago
> > in the Perl group is that there is no separate group
> > comp.lang.python.beginner where you can ask questions without getting
> > hit with RTFM! and the like.
>
> And I wish people that have no clue about the deeper workings of Python
> wouldn't insist on commenting on these in inappropriate ways as above, but
> instead try and _understand_ them before debunking them or suggesting
> changes.
>

I will grant you that "silly" is too strong a word to use in a group
of ardent users but I think it should be completely valid to gripe
about the syntax at least once.



From zzbbaadd at aol.com  Thu Sep 27 21:29:28 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Thu, 27 Sep 2007 18:29:28 -0700
Subject: Python 3.0 migration plans?
In-Reply-To: <mailman.1195.1190936289.2658.python-list@python.org>
References: <mailman.1195.1190936289.2658.python-list@python.org>
Message-ID: <1190942968.920485.311870@g4g2000hsf.googlegroups.com>

It seems that Python 3 is more significant for what it removes than
what it adds.

What are the additions that people find the most compelling?



From steve at holdenweb.com  Fri Sep 28 15:54:48 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 28 Sep 2007 15:54:48 -0400
Subject: Python 3.0 migration plans?
In-Reply-To: <1191008702.579795.141180@r29g2000hsg.googlegroups.com>
References: <1191002679.569709.16870@22g2000hsm.googlegroups.com>	<mailman.1242.1191003389.2658.python-list@python.org>	<1191005906.556751.261940@22g2000hsm.googlegroups.com>	<5m51l4Fbao07U2@mid.uni-berlin.de>	<1191007754.740566.137510@n39g2000hsh.googlegroups.com>
	<1191008702.579795.141180@r29g2000hsg.googlegroups.com>
Message-ID: <46FD5C08.7070603@holdenweb.com>

George Sakkis wrote:
> On Sep 28, 3:29 pm, TheFlyingDutchman <zzbba... at aol.com> wrote:
> 
>> One issue I have with this group and that I encountered many years ago
>> in the Perl group is that there is no separate group
>> comp.lang.python.beginner where you can ask questions without getting
>> hit with RTFM! and the like.
> 
> Which shows once again that you're trying to break the world record of
> being wrong in as many sentences as possible:
> 
>     http://mail.python.org/mailman/listinfo/tutor
> 
> You would do yourself (and others) a favor by migrating there for a
> few weeks or months.
> 
> George
> 
Hopefully with a side dish of alt.attitude.adjustment.

It's not that we don't want you. it's just that you don't seem to 
realize how annoying you can be.

n the other hand, if you *do* realize how annoying you can be then 
please leave now and never come back ;-)

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline


From thorsten at thorstenkampe.de  Tue Sep  4 11:33:00 2007
From: thorsten at thorstenkampe.de (Thorsten Kampe)
Date: Tue, 4 Sep 2007 16:33:00 +0100
Subject: FCGI app reloading on every request
References: <46DCDE59.8060109@animats.com>
Message-ID: <MPG.21478b09a5d2650d989710@news.individual.de>

* John Nagle (Mon, 03 Sep 2007 21:26:01 -0700)
>     I'm converting a web app from CGI to FCGI.  The application works fine
> under FCGI, but it's being reloaded for every request, which makes FCGI
> kind of pointless.  I wrote a little FCGI app which prints when the program is 
> loaded and when it gets a request.  And indeed, the program gets reloaded for
> each HTTP request.  Something is probably misconfigured.  But what?
> [...]
> On the Python side, I'm using Python 2.5 on Linux, with Alan
> Saddi's "fcgi.py" module.

Do you use fcgi.py or flup? Go for flup


"What's the difference between flup's fcgi module and your previous 
fcgi.py?

Feature-wise, very little, as I do try to keep both implementations in 
sync. The most significant difference is that flup's fcgi module uses 
thread pooling, fcgi.py simply starts a new thread for each 
connection/request. flup's code is refactored and modularized, to 
minimize duplicated code between all 6 servers."

http://trac.saddi.com/flup/wiki/FlupFaq#Whatsthedifferencebetweenflups
fcgimoduleandyourpreviousfcgi.py


From orsenthil at gmail.com  Sun Sep 16 06:05:23 2007
From: orsenthil at gmail.com (O.R.Senthil Kumaran)
Date: 16 Sep 2007 10:05:23 GMT
Subject: IPv6 name resolution using getaddrinfo
Message-ID: <slrnfeq0de.3qe.Senthil@goofy.goofy.com>

Hi all,
To get the hostname, I can use socket.gethostbyname() but that has an
inherent limitation wherein does it not support IPv6 name resolution, and
getaddrinfo() should be used instead.

Looking up the socket.getaddrinfo() documentation, I come to know that

The getaddrinfo() function returns a list of 5-tuples with the following
structure:

(family, socktype, proto, canonname, sockaddr)

family, socktype, proto are all integer and are meant to be passed to
the socket() function. canonname is a string representing the canonical
name of the host. It can be a numeric IPv4/v6 address when AI_CANONNAME
is specified for a numeric host.

With this information, if I try something like this:

>>> for res in socket.getaddrinfo('goofy.goofy.com', None,
>>> socket.AI_CANONNAME):
	print res

	
(2, 1, 6, '', ('10.98.1.6', 0))
(2, 2, 17, '', ('10.98.1.6', 0))
(2, 3, 0, '', ('10.98.1.6', 0))

In the output, I see the cannoname to be always blank ''. I am not
getting the IPv4 or IPv6 address as a result of using getaddrinfo().

Am I making any mistake?

What i am trying is a replacement function for
socket.gethostbyname(hostname) which will work for both IPv4 and IPv6.

# return hostbyname for either IPv4 or IPv6 address. Common function.

def ipv6_gethostbyname(hostname):
	for res in socket.getaddrinfo(hostname,None,
socket.AI_CANONNAME):
		fa, socktype, proto, canonname, sa = res
	return cannoname

The above function does not seem to work. It returns blank value only.

Any help/ pointers?

-- 
O.R.Senthil Kumaran
http://uthcode.sarovar.org


From duncan.booth at invalid.invalid  Thu Sep 27 05:13:42 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 27 Sep 2007 09:13:42 GMT
Subject: sorteddict PEP proposal [started off as orderedict]
References: <1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>
	<1190753722.026806.254530@d55g2000hsg.googlegroups.com>
	<1190756003.292096.71130@o80g2000hse.googlegroups.com>
	<1190789981.385466.37870@57g2000hsv.googlegroups.com>
	<Xns99B760A3F5859duncanbooth@127.0.0.1>
	<1190805297.182232.116830@50g2000hsm.googlegroups.com>
	<Xns99B7957CCE43Fduncanbooth@127.0.0.1>
	<1190815180.945099.248670@n39g2000hsh.googlegroups.com>
	<1190816657.574437.80980@g4g2000hsf.googlegroups.com>
	<1190820026.299569.110250@n39g2000hsh.googlegroups.com>
	<Xns99B7DE66C56F6duncanbooth@127.0.0.1>
	<1190846656.770087.173230@19g2000hsx.googlegroups.com>
	<Xns99B85636C2565duncanbooth@127.0.0.1>
	<1190880801.795820.275070@50g2000hsm.googlegroups.com>
Message-ID: <Xns99B867388AFCAduncanbooth@127.0.0.1>

Mark Summerfield <m.n.summerfield at googlemail.com> wrote:

> As for the license, while it is on PyPI, I'll leave it as GPL v 3. If
> it was wanted for the standard library (and I can't see that ever
> happening), I will happily change it to the one that is preferred for
> Python modules.

Ok, your choice, just be aware that by using such a restrictive license you 
will dissuade a lot of people from using your code. You've prevented your 
module being used in any existing projects with Python license, GPL v2, or 
probably any license other than GPL v3.


From wgwigw at gmail.com  Sun Sep 30 03:24:45 2007
From: wgwigw at gmail.com (momobear)
Date: Sun, 30 Sep 2007 00:24:45 -0700
Subject: Balloon Taskbar Popup for Windows XP
In-Reply-To: <1191062421.610473.13070@19g2000hsx.googlegroups.com>
References: <1191062421.610473.13070@19g2000hsx.googlegroups.com>
Message-ID: <1191137085.480380.296610@w3g2000hsg.googlegroups.com>

On Sep 29, 6:40 pm, makko <elma... at gmail.com> wrote:
> Greetings,
> I need to create a function that will produce a balloon popup in the
> taskbar when called. Whats the shortest and easiest way to do this?
> Thanks.
>
> regards,
> Makko

look at the website, maybe helpful to you.
http://xoomer.alice.it/infinity77/main/freeware.html



From bignose+hates-spam at benfinney.id.au  Tue Sep 18 19:18:20 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 19 Sep 2007 09:18:20 +1000
Subject: [ANN] Metatest 0.1.0
References: <mailman.721.1190126947.2658.python-announce-list@python.org>
Message-ID: <87sl5by343.fsf@benfinney.id.au>

Jonathan Fine <jfine at pytex.org> writes:

> Here's how to write some tests using Metatest. We can think of the
> tests as an executable specification.
> 
>     from metatest.py.mymod import plus, Point
> 
>     # Function plus adds two numbers.
>     plus(2, 2) == 4
>     plus(2, '', _ex=TypeError)

This second example seems counterintuitive. Is '_ex' part of the
public interface? If so, why does it follow the convention for "not
part of the public interface" (i.e. it is named with an underscore)?

-- 
 \           "An eye for an eye would make the whole world blind."  -- |
  `\                                                    Mahatma Gandhi |
_o__)                                                                  |
Ben Finney


From aleax at mac.com  Fri Sep 21 02:00:08 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 20 Sep 2007 23:00:08 -0700
Subject: Google and Python
References: <1190228512.627109.308910@n39g2000hsh.googlegroups.com>
	<ufadnRC5BPZm6GzbnZ2dnUVZ_jOdnZ2d@comcast.com>
	<1190231094.276099.136250@22g2000hsm.googlegroups.com>
	<mailman.781.1190232163.2658.python-list@python.org>
	<1190235678.019823.315850@o80g2000hse.googlegroups.com>
	<SYpIi.5291$7P7.2845@newssvr19.news.prodigy.net>
Message-ID: <1i4rfyx.8vuc2j14j596uN%aleax@mac.com>

Bryan Olson <fakeaddress at nowhere.org> wrote:
   ...
> TheFlyingDutchman asked of someone:
> > Would you know what technique the custom web server uses
> > to invoke a C++ app 
> 
> No, I expect he would not know that. I can tell you
> that GWS is just for Google, and anyone else is almost
> certainly better off with Apache.

Or lighttpd, like YouTube (cfr
<http://trac.lighttpd.net/trac/wiki/PoweredByLighttpd>).


> How does Google use Python? As their scripting-language
> of choice. A fine choice, but just a tiny little piece.
> 
> Maybe Alex will disagree with me. In my short time at
> Google, I was uber-nobody.

YouTube (one of Google's most valuable properties) is essentially
all-Python (except for open-source infrastructure components such as
lighttpd).  Also, at Google I'm specifically "Uber Tech Lead, Production
Systems": while I can't discuss details, my main responsibilities relate
to various software projects that are part of our "deep infrastructure",
and our general philosophy there is "Python where we can, C++ where we
must".  Python is definitely not "just a tiny little piece" nor (by a
long shot) used only for "scripting" tasks; if the mutant space-eating
nanovirus should instantly stop the execution of all Python code, the
powerful infrastructure that has been often described as "Google's
secret weapon" would seize up.

The internal web applications needed to restore things, btw, would seize
up too; as I already said I can't give details of the ones I'm
responsible for (used by Google's network specialists, reliability
engineers, hardware technicians, etc), but Guido did manage to get
permission to talk about his work, Mondrian
(<http://www.niallkennedy.com/blog/archives/2006/11/google-mondrian.html
>) -- that's what we all use to review code, whatever language it's in,
before it can be submitted to the Google codebase (code reviews are a
mandatory step of development at Google).  Internal web applications are
the preferred way at Google to make any internal functionality
available, of course.


Alex


From http  Sun Sep  9 13:09:51 2007
From: http (Paul Rubin)
Date: 09 Sep 2007 10:09:51 -0700
Subject: Does shuffle() produce uniform result ?
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
	<mailman.243.1187955760.32294.python-list@python.org>
	<tooru_honda-7C82D1.10432725082007@wvnews01.netvigator.com>
	<tooru_honda-58C552.20355225082007@wvnews01.netvigator.com>
	<tooru_honda-978B9E.11304526082007@wvnews01.netvigator.com>
	<slrnfdnojg.inr.apardon@rcpc42.vub.ac.be>
	<7xejhfbsjo.fsf@ruckus.brouhaha.com>
	<slrnfdpup6.inr.apardon@rcpc42.vub.ac.be>
	<7xabs39bin.fsf@ruckus.brouhaha.com>
	<13drijhfqlvlk96@corp.supernews.com> <fbvmg0$1p3$3@lust.ihug.co.nz>
	<7xhcm4pl5m.fsf@ruckus.brouhaha.com> <fc059c$aa2$6@lust.ihug.co.nz>
Message-ID: <7xsl5ndau8.fsf@ruckus.brouhaha.com>

Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> writes:
> > ... and it's to NSA's credit that SHA-1 held up for as long as it did.
> But they have no convincing proposal for a successor. That means the gap
> between the classified and non-classified state of the art has shrunk down
> to insignificance.

The successor is SHA-2.


From bdesth.quelquechose at free.quelquepart.fr  Sat Sep  8 13:00:10 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 08 Sep 2007 19:00:10 +0200
Subject: creating really big lists
In-Reply-To: <mailman.121.1189035929.2658.python-list@python.org>
References: <mailman.121.1189035929.2658.python-list@python.org>
Message-ID: <46e59dcd$0$21897$426a74cc@news.free.fr>

Delaney, Timothy (Tim) a ?crit :
> Hrvoje Niksic wrote:
> 
> 
>>Dr Mephesto <dnhkng at googlemail.com> writes:
>>
>>
>>>I would like to create a pretty big list of lists; a list 3,000,000
>>>long, each entry containing 5 empty lists.
(snip)
> 
>>If you're building large data structures and don't need to reclaim
>>cyclical references, I suggest turning GC off, at least during
>>construction.
>  
> This is good advice, but another question is whether you really want
> such a list. You may well be better off with a database of some kind -
> they're designed for manipulating large amounts of data.

Hear hear... At least some sensible answer !-)


From mcknight0219 at gmail.com  Sun Sep 16 04:42:33 2007
From: mcknight0219 at gmail.com (Jimmy)
Date: Sun, 16 Sep 2007 01:42:33 -0700
Subject: (wxPython) icon on panel
Message-ID: <1189932153.859201.222370@o80g2000hse.googlegroups.com>

hi,all!
have you used 'dictionary' of linux, the program that rests on the
panel as an icon, and when you click on the icon, it will display a
window and do something. So i'm wondering how to achieve this. I guess
it's a dialog window, right? but the crucial part is how to minimize
the program to an icon on the panel and make it responsive to the
click event.
thanks in advance!



From jorgen.maillist at gmail.com  Fri Sep  7 12:49:12 2007
From: jorgen.maillist at gmail.com (Jorgen Bodde)
Date: Fri, 7 Sep 2007 18:49:12 +0200
Subject: How to determine the bool between the strings and ints?
In-Reply-To: <1189182688.290480.102350@o80g2000hse.googlegroups.com>
References: <mailman.227.1189179649.2658.python-list@python.org>
	<1189182688.290480.102350@o80g2000hse.googlegroups.com>
Message-ID: <11e49df10709070949h185101c0gbec198a362b053e7@mail.gmail.com>

Awesome! Thanks you!

As for why caring if they are bools or not, I write True and False to
the properties, the internal mechanism works like this so I need to
make that distinction.

Thanks again guys,
- Jorgen

ps. Sorry TheFlyingDutch for mailing you personally, I keep forgetting
this mailinglist does not default back to the user list when replying
;-)


From DustanGroups at gmail.com  Sun Sep 16 13:35:51 2007
From: DustanGroups at gmail.com (Dustan)
Date: Sun, 16 Sep 2007 17:35:51 -0000
Subject: where are the .pyc files?
In-Reply-To: <1189963710.714191.74440@n39g2000hsh.googlegroups.com>
References: <1189963710.714191.74440@n39g2000hsh.googlegroups.com>
Message-ID: <1189964151.926924.104720@n39g2000hsh.googlegroups.com>

On Sep 16, 12:28 pm, Summercool <Summercooln... at gmail.com> wrote:
> so i have always heard of the .pyc files....  but for some reason i
> don't see them on the Windows platform...  when i have a program
> called  try.py  and after running it for ages, i still don't have a
> try.pyc file in my folder even if i turn the "show hidden file" to on.

Try "import try".

Ummm.... No, you can't.

Rename the file to "exodomuzos.py", then "import exodomuzos".



From bjorn.kempen at gmail.com  Sat Sep 15 18:41:49 2007
From: bjorn.kempen at gmail.com (buffi)
Date: Sat, 15 Sep 2007 22:41:49 -0000
Subject: problems using pythom tempfile module
In-Reply-To: <1189894434.135052.283420@w3g2000hsg.googlegroups.com>
References: <1189890699.807384.258580@o80g2000hse.googlegroups.com>
	<1189891458.583774.171030@22g2000hsm.googlegroups.com>
	<1189894434.135052.283420@w3g2000hsg.googlegroups.com>
Message-ID: <1189896109.216802.125840@22g2000hsm.googlegroups.com>

Pretend that you have a number that is always pointing somewhere in
your temporary file.
It starts a 0.
If you then write "lalalala" (8 characters) it will point after these
at position 8, so that you can write more stuff after your previous
text later by calling write.

The read method reads all the data from the current position of the
"pointer" to the end of the file. If you simply call it after writing,
you wont get anything since you are already at the end of the file.
Therefore you "rewind" the pointer back to the start by calling seek
which takes the position in the file to go to...
your_file.seek(0) returns you to the start of the file to read all of
its data

- Bj?rn Kemp?n



From conra2004 at yahoo.com  Thu Sep 27 18:06:01 2007
From: conra2004 at yahoo.com (yadin)
Date: Thu, 27 Sep 2007 15:06:01 -0700
Subject: developing an application
Message-ID: <1190930761.625756.309830@50g2000hsm.googlegroups.com>

hi!
i was buiding an application using python...a program
this was my first one...now that i got it working perfectly
how can i put the bunch of files into one package?
the user of the appliation will not know where to start? that is which
file to click on in oder to start the program?
thanks a lot



From steve at holdenweb.com  Tue Sep 18 12:14:33 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 18 Sep 2007 12:14:33 -0400
Subject: can Python be useful as functional?
In-Reply-To: <1190073045.618869.261290@k79g2000hse.googlegroups.com>
References: <1190073045.618869.261290@k79g2000hse.googlegroups.com>
Message-ID: <fcoth7$ae0$1@sea.gmane.org>

Lorenzo Stella wrote:
[...]
> My question is: how can we call a language "functional" if it's major
> implementation has a limited stack? Or is my code wrong?
> 
So, which environment do you habitually use that provides an *unlimited* 
stack?

You remind me of the conversation between the philosopher and an 
attractive lady whom he was seated next to at dinner. He asked her if 
she would sleep with him for a million dollars, to which she readily 
agreed. So he followed this by asking her if she'd sleep with him for a 
dollar. She replied: "No. Do you take me for a prostitutte?", to which 
his riposte was "We have already established that fact, and are now 
merely haggling about the price".

You just don't like the specific limit that Python imposes. So increase 
it with sys.setrecursionlimit().

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From gheize at gmail.com  Tue Sep  4 05:43:08 2007
From: gheize at gmail.com (Guillermo Heizenreder)
Date: Tue, 04 Sep 2007 06:43:08 -0300
Subject: [pygtk] problem with TreeView + ListStore
Message-ID: <1188898988.1080.0.camel@leinad-desktop>

Hi list
I'm developing a application for learn pygkt, and I need to know when a
user selected or clicked one determinate row of my TreeView for shot
another signal .

Study the tutorial [1] I began to see the explanation that I see in the
chapter 14.7. TreeView Signal and found one in particular
"select-cursor-row", but I don't understood  how implementing.

Something like that.
   if user_selected_row:
      self.hbox_118.show()
      print "YES"       

NOTE: self.hbox_118 = wTree.get_widget("hbox118")

Thank and Regard
  
[1] http://www.pygtk.org/pygtk2tutorial/sec-TreeViewSignals.html

P/D: my English it to bad, I'm a novice.
-- 
Heizenreder Guillermo
http://code.google.com/u/gheize/



From http  Wed Sep 26 14:51:49 2007
From: http (Paul Rubin)
Date: 26 Sep 2007 11:51:49 -0700
Subject: sorteddict PEP proposal [started off as orderedict]
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>
	<1190753722.026806.254530@d55g2000hsg.googlegroups.com>
	<1190756003.292096.71130@o80g2000hse.googlegroups.com>
	<1190789981.385466.37870@57g2000hsv.googlegroups.com>
	<Xns99B760A3F5859duncanbooth@127.0.0.1>
	<87sl51lshd.fsf@mulj.homelinux.net>
	<1190799759.367001.106400@r29g2000hsg.googlegroups.com>
	<87fy11lo22.fsf@mulj.homelinux.net>
	<1190804538.469582.96950@22g2000hsm.googlegroups.com>
	<slrnffkjoa.hc2.apardon@rcpc42.vub.ac.be>
	<1190814263.104358.158090@n39g2000hsh.googlegroups.com>
Message-ID: <7xy7etnttm.fsf@ruckus.brouhaha.com>

Mark Summerfield <m.n.summerfield at googlemail.com> writes:
> The sorteddict API that has emerged so far is (1) apart from the
> constructor, everything is identical to dict, 

I don't see this as necessary, it's ok if it resembles dict as much
as dbm does.

> (2) the constructor takes the same args as sorted(), so if you want
> to seed with a dict or with keywords you write
> sorteddict(dict(a=1,b=2), ...), (or you could create a sorteddict
> and use update() since that takes the same args as dict's
> constructor).

sorteddict could itself return a constructor:

    d = sorteddict(key=int).new((('12', 'a'), ('3', 'b')))

gives sorted version of {'3':'b', '12':'a'}


From f.guerrieri at gmail.com  Mon Sep  3 07:46:31 2007
From: f.guerrieri at gmail.com (Francesco Guerrieri)
Date: Mon, 3 Sep 2007 13:46:31 +0200
Subject: So what exactly is a complex number?
In-Reply-To: <46dbed49$0$30375$9b4e6d93@newsspool4.arcor-online.net>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
	<mailman.212.1188576194.28954.python-list@python.org>
	<451mq4-les.ln1@ozzie.tundraware.com>
	<mailman.266.1188644067.28954.python-list@python.org>
	<lbjpq4-eo22.ln1@ozzie.tundraware.com>
	<mailman.310.1188805355.28954.python-list@python.org>
	<46dbed49$0$30375$9b4e6d93@newsspool4.arcor-online.net>
Message-ID: <79b79e730709030446m1e02266doda061eef5415bbb9@mail.gmail.com>

On 9/3/07, Wildemar Wildenburger <lasses_weil at klapptsowieso.net> wrote:
>
> Grzegorz S?odkowicz wrote:
> > In fact, a proper vector in physics has 4 features: point of
> > application, magnitude, direction and sense.
> >
> OK, help me out here: What 'direction' does |?> (a state-vector in
> quantum mechanics) have? Also, doesn't sense directly follow from the
> point of application.


For instance, you can apply a force to a point and it can be "outward" or
"inward".

The direction of a state vector is completely specified by its decomposition
(given finite norm and completeness of the basis), just like ordinary
vectors.
But since actually in quantum mechanics you are dealing with unit rays and
everything is defined up to a phase (which could be relevant given the topic
of this thread!)... I'd say that kets are not the most recommendable way to
introduce the concept of vector, or of complex variables :-)

francesco
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From steve at holdenweb.com  Sun Sep 16 11:49:15 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 16 Sep 2007 11:49:15 -0400
Subject: Needless copying in iterations?
In-Reply-To: <13epv3fnb6bak15@corp.supernews.com>
References: <fchk59$mm3$1@daisy.noc.ucla.edu>	<5l3ab6F5v20uU3@mid.uni-berlin.de>
	<13eourdrne86e61@corp.supernews.com>	<874phv42to.fsf@benfinney.id.au>
	<13epv3fnb6bak15@corp.supernews.com>
Message-ID: <46ED507B.2050106@holdenweb.com>

Steven D'Aprano wrote:
> On Sun, 16 Sep 2007 15:05:55 +1000, Ben Finney wrote:
> 
>> Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> writes:
>>
>>> In *general* the compiler can't tell, but in specific cases it could. A
>>> (hypothetical) optimizing compiler would tell the difference between:
>>>
>>> for item in alist[1:5]:
>>>     print item # no possible side-effects
>> The 'print' statement converts the 'item' to a str. That conversion
>> could, in a pathological case, have a side-effect (say, if the class of
>> 'item' had an overridden '__str__' method with side effects), and the
>> compiler can't know this isn't a pathological case.
> 
> Fair enough... but I'm reminded of a rant by Joel Spolsky about GUI 
> design:
> 
> '...programmers have tended to think that if users are allowed to resize 
> and move windows, they should have complete flexibility over where these 
> windows go, right down to the last pixel. After all, positioning a window 
> 2 pixels from the top of the screen is "equally likely" as positioning a 
> window exactly at the top of the screen.'
> 
> http://www.joelonsoftware.com/uibook/fog0000000249.html
> 
> (three quarters of the way down, in Chapter 7.)
> 
> Maybe I'm being unfair, but it seems to me that the attitude is similar: 
> 'there's no point optimizing the common case of printing (say) ints 
> stored in a list, Just In Case the programmer wants the incredibly rare 
> case of setting sys.stdout to some wacky object that modifies the list 
> he's iterating over. It could happen.'
> 
> *shrug* But apart from the occasional smart-alec who does it just to 
> demonstrate that it is possible, it probably never has.
> 
> It seems to me that the "consenting adults" philosophy of Python doesn't 
> extend to the compiler, and perhaps it should. Maybe Python could 
> optimize common cases, and if developers wanted to do wacky things, let 
> them turn optimization off on a module-by-module basis.
> 
> Or even function-by-function. Wouldn't it be nice to have decorators that 
> could optimize the functions they decorated?
> 
No, it would be disastrous, unless you could manage to implement a 
mechanism that *told* you when the optimizations were playing havoc with 
your program's execution.

The problem is that debugging only works if you can assume a 
deterministic environment. If you are going to put funky optimizations 
in that break determinism in "little-used" corner cases, then debugging 
the situations when the optimizations *do* affect program execution will 
be a complete pain.

> 
>>> for item in alist[1:5]:
>>>     alist.append(item) # side-effects DON'T matter
>> The compiler doesn't know that, at the time of invocation,
>> 'alist.append' doesn't have side effects that matter.
> 
> It might if it knows what type alist is, and how long it is (as Marc 
> Rintsch points out). That's why I used "alist" in my example rather than 
> "an_arbitrary_sequence".
> 
But alist doesn't *have* a type, and static program analysis would have 
to be extensive to determine that it could only ever be of a specific type.
> 
>> The compiler for a dynamic language like Python has very little absolute
>> "no significant side-effect in these specific cases" guarantee of the
>> kind you're assuming even in the cases you choose for contrast with the
>> ones that *do* have significant side-effects.
> 
> Yes, in general one might not be able to make those guarantees, but still 
> there are common cases where you can. That's how Psycho works.
> 
Yes, but psycho doesn't use static program analysis but instead uses 
run-time environment examination to determine whether specific 
optimizations can be applied.

> The point is rather moot, since CPython (and probably other Pythons) do 
> almost no optimizations. But just because Python is a dynamic language 
> doesn't mean there are no optimizations possible: Haskell is a dynamic 
> language, and there are optimizing compilers for it. Of course, it is 
> much simpler for Haskell, because of the type system it uses.
> 
> The CPython compiler already does a couple of source-code optimizations 
> (ignores some unused strings; some constant folding) and at least one 
> runtime optimization (string concatenation is no longer _always_ slow):
> 
> http://utcc.utoronto.ca/~cks/space/blog/python/ExaminingStringConcatOpt
> 
> Because of its very nature, optimizing Python is hard. Even something as 
> simple as tail-call recursion optimization is verboten, because Guido 
> considers good stack traces more important than preventing stack 
> overflows in the first place:
> 
> http://www.tratt.net/laurie/tech_articles/articles/tail_call_optimization
> 
And who's to say he's wrong, especially since Python is intended to be 
an environment that's friendly to beginners.

> Anyway, I'm not really complaining. I like Python, I'm grateful for the 
> work the Python-dev people have already done, and I'm in no position to 
> volunteer to write an optimizing compiler. And it may be that, regardless 
> of how smart you make the compiler, Python simply can't be optimized 
> because of design decisions made back in 1990-whatever when Guido first 
> started his grand plan.
> 
There is some of that. The environment is so dynamic that even something 
as innocuous as attribute lookup can actually involve properties (for 
example) reading a relational database! I'm not saying that optimization 
under these circumstances is possible, but that it's much more difficult 
than is easily anticipated, and that the benefits to be gained might be 
less than you would think.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From software at ginstrom.com  Fri Sep 14 01:27:46 2007
From: software at ginstrom.com (Ryan Ginstrom)
Date: Fri, 14 Sep 2007 14:27:46 +0900
Subject: Setting stdout encoding
In-Reply-To: <op.tymmh2x3x6zn5v@gabriel2.softlabbsas.com.ar>
References: <1189416350.069995.220250@w3g2000hsg.googlegroups.com><cfb578b20709100602i4146f5c0hd2a1343f644a90f@mail.gmail.com><op.tygmb9nux6zn5v@gabriel2.softlabbsas.com.ar><cfb578b20709110358n5801c19ie21d95ef1161e4c0@mail.gmail.com><op.tykwpjijx6zn5v@gabriel2.softlabbsas.com.ar><cfb578b20709130408u2bf27cabl72d230f5252480a6@mail.gmail.com><00e601c7f5fb$43d5ccf0$0203a8c0@MOUSE>
	<op.tymmh2x3x6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <02dd01c7f68f$fc272ad0$0203a8c0@MOUSE>

> On Behalf Of Gabriel Genellina
> You should check that obj is an unicode object before calling 
> encode.  
> Strings should not be encoded.
...
> __getattr__ is only called when the attribute has NOT been 
> found in the usual way, so checking for "write" is 
> unnecesary. Just return getattr(self.stdout, attr) always.

Thanks a lot. Here is my modified class:

import sys

class OutStreamEncoder(object):
    """Wraps a stream with an encoder
    """

    def __init__(self, outstream, encoding=None):
        self.out = outstream
        if not encoding:
            self.encoding = sys.getfilesystemencoding()
        else:
            self.encoding = encoding

    def write(self, obj):
        """Wraps the stream's output stream, encoding unicode
        strings with the specified encoding"""

        if isinstance(obj, unicode):
            self.out.write(obj.encode(self.encoding))
        else:
            self.out.write(obj)

    def __getattr__(self, attr):
        """Delegate everything but write to the stream"""

        return getattr(self.out, attr)

Regards,
Ryan Ginstrom



From zzbbaadd at aol.com  Wed Sep 12 01:00:29 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Tue, 11 Sep 2007 22:00:29 -0700
Subject: Get the complete command line as-is
In-Reply-To: <1189567985.089215.108250@k79g2000hse.googlegroups.com>
References: <1189566000.793354.308420@19g2000hsx.googlegroups.com>
	<1189567985.089215.108250@k79g2000hse.googlegroups.com>
Message-ID: <1189573229.875265.250340@d55g2000hsg.googlegroups.com>

On Sep 11, 8:33 pm, TheFlyingDutchman <zzbba... at aol.com> wrote:
> On Sep 11, 8:00 pm, wangzq <wan... at gmail.com> wrote:
>
> > Hello,
>
> > I'm passing command line parameters to my browser, I need to pass the
> > complete command line as-is, for example:
>
> > test.py "abc def" xyz
>
> > If I use ' '.join(sys.argv[1:]), then the double quotes around "abc
> > def" is gone, but I need to pass the complete command line ("abc def"
> > xyz) to the browser, how can I do this?
>
> > I'm on Windows.
>
> > Thanks.
>
> I'm on Solaris and this works for me:
>
> test.py '"abc def" xyz'
>
> print sys.arv[1]
>
> "abc def" xyz

OK, now I'm on Windows XP and things aren't looking too good.

It seems that \" will retain the quote marks but then the spaces get
gobbled.

But if you replace the spaces with another character:

python.exe test.py  \"abc#def\"#123

then:

import sys
commandLine = "".join(sys.argv[1:])

prints commandLine.replace('#',' ')

gives:

"abc def" 123

Don't know if you can use that technique or not.



From bj_666 at gmx.net  Mon Sep 24 15:02:51 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 24 Sep 2007 19:02:51 GMT
Subject: puzzled about floats
References: <mailman.1004.1190657809.2658.python-list@python.org>
Message-ID: <5lqfuqF95s07U6@mid.uni-berlin.de>

On Mon, 24 Sep 2007 14:13:18 -0400, Neal Becker wrote:

> from math import modf
> 
> class nco (object):
>     def __init__ (self, delta):
>         self.delta = delta
>         self.phase = 0.0
>     def __call__ (self):
>         self.phase += self.delta
>         f,i = modf (self.phase)
>         print  modf (self.phase)
>         if (self.phase > 1.0):
>             self.phase -= 1.0
>         return self.phase
> 
> n = nco (0.1)
> for x in xrange (100):
>     print '%.12f' % n()
> 
> prints out
> [...]
> (0.99999999999999978, 0.0)   <<< from modf
> 1.000000000000   << from n()
> 
> I'm baffled as to why 'print modf (self.phase)' prints out the first value,
> but the result printed in the 2nd case is different.  Without any precision
> spec on the first print, an approximate float value was printed, but even
> with %.12f, the second gives exactly 1.000....

Tuples are printed with calling `repr()` on the objects:

In [144]: str(0.1)
Out[144]: '0.1'

In [145]: repr(0.1)
Out[145]: '0.10000000000000001'

In [146]: '%.12f' % 0.1
Out[146]: '0.100000000000'

In [147]: '%.50f' % 0.1
Out[147]: '0.10000000000000000555111512312578270211815834045410'

Ciao,
	Marc 'BlackJack' Rintsch


From duncan.booth at invalid.invalid  Sat Sep 29 07:39:23 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 29 Sep 2007 11:39:23 GMT
Subject: question about for cycle
References: <mailman.1275.1191060311.2658.python-list@python.org>
	<1191062383.322949.55300@d55g2000hsg.googlegroups.com>
Message-ID: <Xns99BA80C06DE77duncanbooth@127.0.0.1>

Ant <antroy at gmail.com> wrote:

> On Sep 29, 11:04 am, "fdu.xia... at gmail.com" <fdu.xia... at gmail.com>
> wrote:
> ...
>> What should I do if I want the outer "for" cycle to continue or break
>> ? If I put a "continue" or "break" in the inner cycle, it has no
>> effect on the outer cycle.
> 
...

> I guess to an extent it would depend on the exact situation as to
> which of these is more suitable. Are there any other recommended
> solutions to this?
> 

I think the other Pythonic option you have missed is to convert the nested 
for loops into a single loop by writing a generator.

def ranges(limit1, limit2):
     range1, range2 = range(limit1), range(limit2)
     for i in range1:
         for j in range2:
             yield i,j

...
    for i, j in ranges(10, 10):
        ... whatever ...
        if j==6:
            break



From Bart.Peters at GEN.unimaas.nl  Mon Sep 17 10:39:42 2007
From: Bart.Peters at GEN.unimaas.nl (Peters Bart (GEN))
Date: Mon, 17 Sep 2007 16:39:42 +0200
Subject: Simple elementtree question
Message-ID: <CB7A1F5E45DB7642B606FF9C3E728BF00B68CA69@um-mail0136.unimaas.nl>

I have the exact same problem, rdf and elementtree
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From eduardo.padoan at gmail.com  Sat Sep 15 11:20:22 2007
From: eduardo.padoan at gmail.com (Eduardo O. Padoan)
Date: Sat, 15 Sep 2007 12:20:22 -0300
Subject: How to avoid overflow errors
In-Reply-To: <46eb6ad1$0$7493$4c368faf@roadrunner.com>
References: <13em8vnr527rq20@corp.supernews.com>
	<mailman.560.1189817022.2658.python-list@python.org>
	<7xmyvoag7j.fsf@ruckus.brouhaha.com>
	<mailman.562.1189821558.2658.python-list@python.org>
	<46eb6ad1$0$7493$4c368faf@roadrunner.com>
Message-ID: <dea92f560709150820w4cdfdd20n52a3236587750832@mail.gmail.com>

On 9/15/07, Carl Banks <pavlovevidence at gmail.com> wrote:
> On Fri, 14 Sep 2007 22:59:13 -0300, Eduardo O. Padoan wrote:
>
> > On 14 Sep 2007 18:08:00 -0700, Paul Rubin
> > <"http://phr.cx"@nospam.invalid> wrote:
> >> "Eduardo O. Padoan" <eduardo.padoan at gmail.com> writes:
> >> > Not totally unrelated, but in Py3k, as it seems, overflows are really
> >> > things of the past:
> >> >
> >> >
> >> > Python 3.0a1 (py3k:58061, Sep  9 2007, 13:18:37) [GCC 4.1.3 20070831
> >> > (prerelease) (Ubuntu 4.1.2-16ubuntu1)] on linux2 Type "help",
> >> > "copyright", "credits" or "license" for more information.
> >> > >>> class MyInt(int):
> >> > ...     pass
> >> > ...
> >> > >>> import sys
> >> > >>> MyInt(sys.maxint)
> >> > 2147483647
> >> > >>> MyInt(sys.maxint+1)
> >> > 2147483648
> >>
> >> I'd be interested in knowing what happens in 3.0a1 with
> >>
> >>   a = itertools.count(sys.maxint)
> >>   print a.next()
> >>   print a.next()
> >
> >
> >>>> print(next(a))
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in <module>
> > OverflowError: cannot count beyond PY_SSIZE_T_MAX
> >
> > Hum, you've got me there. it is the same as in 2.x. Maybe the message
> > should be less crypt, at least - nothing that googling for
> > PY_SSIZE_T_MAX cant help.
>
> This should demonstrate that OverflowError will not disappear entirely
> even in Python 3.

No one is denying that by now :)

> Even if we were to get rid of all OverflowErrors resulting from integer
> operations in Python, there are going to be some C extensions--including
> some in the Python standard library--that will store 32-bit integers.
> Modules such as array and struct will still raise it, and probably other
> modules were a long integer sometimes doesn't make sense (socket, for
> instance).  itertools.count() should work for arbitrary integers, though.

Agreed. I was lookind at itertoolsmodule.c, and even for my very
limited C knowlegment, it does not seem to be too hard.
Anyway: http://bugs.python.org/issue1165


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


-- 
http://www.advogato.org/person/eopadoan/
Bookmarks: http://del.icio.us/edcrypt


From jcd at sdf.lonestar.org  Thu Sep 27 16:02:01 2007
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Thu, 27 Sep 2007 16:02:01 -0400
Subject: ValueError: too many values to unpack,>>>
In-Reply-To: <46fc09ae$0$22333$426a74cc@news.free.fr>
References: <mailman.1169.1190911027.2658.python-list@python.org>
	<5m24sfFatlbuU1@mid.uni-berlin.de>
	<46FBED79.6070207@comcast.net> <fdgs2t$8ni$1@sea.gmane.org>
	<mailman.1183.1190921081.2658.python-list@python.org>
	<46fc09ae$0$22333$426a74cc@news.free.fr>
Message-ID: <20070927200201.GA27262@sdf.lonestar.org>

On Thu, Sep 27, 2007 at 09:50:26PM +0200, Bruno Desthuilliers wrote regarding Re: ValueError: too many values to unpack,>>>:
> 
> Shawn Minisall a ?crit :
> > Fredrik Lundh wrote:
> > 
> >> Shawn Minisall wrote:
> >>
> >>  
> >>
> >>> Sorry, it looks like it's on the fourth line with the 3 values on 
> >>> line 4...its reading line 3 fine
> >>>
> >>> Traceback (most recent call last):
> >>>   File "<pyshell#0>", line 1, in <module>
> >>>     main()
> >>>   File "I:\COMPUTER PROGRAMMING CLASS\PROJECT #1\project1.py", line 
> >>> 33, in main
> >>>     deposit1, deposit2, deposit3 = string.split(line, "\t")
> >>> ValueError: too many values to unpack
> >>>     
> >>
> >>
> >> instead of fumbling around in the dark, try inserting a print 
> >> statement before the offending line, so you can see what you're trying 
> >> to unpack:
> >>
> >>      print string.split(line, "\t") # see what it is
> >>      deposit1, deposit2, deposit3 = string.split(line, "\t")
> >>
> >> </F>
> >>   
> > 
> > I did and it printed everything up until the 3rd line with 3 numbers for 
> > deposits.  I have since figured it out...the teacher put in an extra tab 
> > after the last value so python thought it was 4 values for three.  I 
> > went back into the file and deleted the extra tab after the 3rd number 
> > and saved it...now it's working fine.
> > I'm going to kill her...
> 
> You'd better learn how to deal with "this-cant-happen-here" situation, 
> because it's how it is in real-life.
> 

And preferably learn how to deal with it in your code, not in the data that's given to you.  I wouldn't be surprised if your teacher gave you that on purpose.  There's an old maxim which I think applies here: "Be liberal in what you accept and conservative in what you produce."

Note that you have *not* come up with code that handles the dataset given to you by your professor.  Do not expect full marks on this homework assignment, unless you go back and modify your code to handle extraneous tabs at the end of the line.

Cheers,
Cliff



From exhuma at gmail.com  Tue Sep 18 08:58:17 2007
From: exhuma at gmail.com (exhuma.twn)
Date: Tue, 18 Sep 2007 05:58:17 -0700
Subject: super, apply, or __init__ when subclassing?
In-Reply-To: <46efc85f$0$17612$426a74cc@news.free.fr>
References: <1190100791.740269.62880@k79g2000hse.googlegroups.com>
	<46efc85f$0$17612$426a74cc@news.free.fr>
Message-ID: <1190120297.396213.312470@r29g2000hsg.googlegroups.com>

On Sep 18, 2:45 pm, Bruno Desthuilliers <bruno.
42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> exhuma.twn a ?crit :
>
> > This is something that keeps confusing me. If you read examples of
> > code on the web, you keep on seeing these three calls (super, apply
> > and __init__) to reference the super-class. This looks to me as it is
> > somehow personal preference. But this would conflict with the "There
> > one way to do it" mind-set.
>
> apply is deprecated. Chances are that code using it is somewhat old.
> super came with the new object model in Python 2.2.1 (IIRC), and is only
> useful for some corner cases involving multiple inheritence . Directly
> calling the superclass's method (__init__ or whatever) is the canonical
> way in the most common cases.
>
> And BTW, the sentence is "there *should* be one - and *preferably* only
> one - *obvious* way to do it" (emphasis is mine). In this case, there's
> _at least_ one way do to do it, and only one (direct call) is really
> obvious IMHO !-)
>
> > So, knowing that in python there is one thing to do something, these
> > three different calls must *do* domething different.
>
> Indeed. But mostly because you managed to get 2 examples wrong !-)
>
> > But what exactly
> > *is* the difference?
>
> > ------------ Exampel 1: -----------------------------
>
> > class B(A):
> >    def __init__(self, *args):
> >       A.__init__(self, args)
>
> You want:
>
> class B(A):
>     def __init__(self, *args):
>        A.__init__(self, *args)

Ah.. this was a typo in my original post. Oops ;)

>
> > ------------ Exampel 2: -----------------------------
>
> > class B(A):
> >    def __init__(self, *args):
> >       apply( A.__init__, (self,) + args)
>
> is the same as the previous, using the deprecated apply function.
>
> > ------------ Exampel 3: -----------------------------
>
> > class B(A):
> >    def __init__(self, *args):
> >       super(A,self).__init__(*args)
>
> You want:
>
> class B(A):
>     def __init__(self, *args):
>        super(B,self).__init__(*args)

Hmmm... and suddenly it all makes sense! Great!

Thanks all for clarifying this to a Java-Convert ;)



From bignose+hates-spam at benfinney.id.au  Wed Sep 26 04:03:21 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 26 Sep 2007 18:03:21 +1000
Subject: setuptools without unexpected downloads
References: <87ejgmklep.fsf@benfinney.id.au> <878x6ukkvq.fsf@benfinney.id.au>
	<5luhb0Faal8aU1@mid.uni-berlin.de>
Message-ID: <874phhlupi.fsf@benfinney.id.au>

"Diez B. Roggisch" <deets at nospam.web.de> writes:

> Ben Finney schrieb:
> > To clarify: I want to retain the "assert the specified
> > dependencies are satisfied" behaviour, without the "... and, if
> > not, download and install them the Setuptools Way" behaviour.
> >
> > Instead, I just want the default "dependencies not satisfied"
> > behaviour for my 'setup.py' program to be: complain the
> > dependencies aren't met, and refuse to install.
> 
> The problem here is that your favorite OS vendor/distributor not
> necessarily offers the required meta-information - so setuptools
> can't check the dependencies.

Let's assume it does. How would I modify my 'setup.py' script so that
its default behaviour, when dependencies are not met, is not "download
and install dependencies via setuptools" but instead "exit with error
message"?

-- 
 \        "With Lisp or Forth, a master programmer has unlimited power |
  `\     and expressiveness. With Python, even a regular guy can reach |
_o__)                            for the stars."  -- Raymond Hettinger |
Ben Finney


From p at ulmcnett.com  Tue Sep 18 17:11:23 2007
From: p at ulmcnett.com (Paul McNett)
Date: Tue, 18 Sep 2007 14:11:23 -0700
Subject: How do you limit the # of lines Read?
In-Reply-To: <1190149187.799482.151320@19g2000hsx.googlegroups.com>
References: <1190149187.799482.151320@19g2000hsx.googlegroups.com>
Message-ID: <46F03EFB.808@ulmcnett.com>

koutoo at hotmail.com wrote:
> I am working on a loop for my code and was wondering if there is a way
> to limit the number of lines read through?  I'd hate to cut the test
> file in order to run the code in the testing phase.  Can you add a
> value in the parenthesis of the readline() function?
> 
> t = string.readline()  # Limit this somehow?

Assuming s is a file-like object:

for idx, line in enumerate(s):
         if idx > 2:
                 break
         print idx, line


-- 
pkm ~ http://paulmcnett.com


From bdesth.quelquechose at free.quelquepart.fr  Fri Sep  7 12:33:51 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Fri, 07 Sep 2007 18:33:51 +0200
Subject: Organizing Code - Packages
In-Reply-To: <1189280539.449868.169910@22g2000hsm.googlegroups.com>
References: <1189177596.960379.244990@w3g2000hsg.googlegroups.com>
	<46e17143$0$6189$426a74cc@news.free.fr>
	<1189183088.922537.18290@r34g2000hsd.googlegroups.com>
	<87r6laa0ir.fsf@rudin.co.uk>
	<46e1a0bc$0$7689$9b4e6d93@newsspool2.arcor-online.net>
	<1189280539.449868.169910@22g2000hsm.googlegroups.com>
Message-ID: <46e412b7$0$21562$426a74cc@news.free.fr>

xkenneth a ?crit :
> On Sep 7, 2:04 pm, Wildemar Wildenburger
> <lasses_w... at klapptsowieso.net> wrote:
> 
>>Paul Rudin wrote:
>>
>>>xkenneth <xkenn... at gmail.com> writes:
>>
>>>>>Ah, yes, a couple of things:
>>>>>- avoid the 'one-class-per-file' syndrom. It's perfectly ok to have tens
>>>>
>>>>Yes but i find it hard to edit classes easily when I have more than
>>>>one class per file.
>>
>>>Why?
>>
>>Scroll-Blindness would be a good reason.
>>
>>It would however be completely rediculous to create a file for every
>>10-liner class you have (and I have found that Python classes tend to be
>>rather short).
>>
>>/
> 
> 
> Yes I agree, "Scroll-Blindness" it just gets long and confusing.
> Navigating isn't so bad (emacs) here.

Don't you use ECB ? (Emacs Code Browser) ?

But even without it, it's a problem of file size, not a problem of 
number of classes.

(snip question about import, cf other answers)


From m.n.summerfield at googlemail.com  Wed Sep 26 02:59:41 2007
From: m.n.summerfield at googlemail.com (Mark Summerfield)
Date: Wed, 26 Sep 2007 06:59:41 -0000
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <1190756003.292096.71130@o80g2000hse.googlegroups.com>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>
	<1190753722.026806.254530@d55g2000hsg.googlegroups.com>
	<1190756003.292096.71130@o80g2000hse.googlegroups.com>
Message-ID: <1190789981.385466.37870@57g2000hsv.googlegroups.com>

On 25 Sep, 22:33, Paul Hankin <paul.han... at gmail.com> wrote:
> On Sep 25, 9:55 pm, Mark Summerfield <m.n.summerfi... at googlemail.com>
> wrote:
>
> > ...
> > class sorteddict(dict):
>
> > ...
> >         if self.__keys is None:
> >             self.__keys = sorted(dict.keys(self), cmp=self.__cmp,
> >                                  key=self.__key,
> > reverse=self.__reverse)
>
> You'd be better defining __keys like this:
>
> def __getkeys(self):
>   if self.__keycache is None:
>      self.__keycache = dict.keys(self)
>      self.__keycache.sort(cmp=...)
>   return self.__keycache
>
> __keys = property(__getkeys)
>
> and where you have 'self.__keys = None', either replace with
> 'self.__keycache = None' or more cleanly with a call to:
>
> def __invalidate_key_cache(self):
>     self.__keycache = None
>
> to improve the code quality.

Yes, that's much better.

As you've no doubt realised, this particular implementation gives best
performance when the pattern of use is: lots of edits, lots of
lookups, ..., and gives worst performance when the pattern of use is:
edit, lookup, edit, lookup (in which case using a dict and sorted() is
probably better).

So there is lots of scope for someone to do a version that has good
performance for all patterns of use:-)

I've put a full version with doctests & docstrings on PyPI:
http://pypi.python.org/pypi/sorteddict

Here's the stripped version (just 92 lines):

class sorteddict(dict):

    def __init__(self, iterable=None, cmp=None, key=None,
reverse=False):
        if iterable is None:
            iterable = []
        dict.__init__(self, iterable)
        self.__cmp = cmp
        self.__key = key
        self.__reverse = reverse
        self.__keycache = None

    @property
    def __keys(self):
        if self.__keycache is None:
            self.__keycache = dict.keys(self)
            self.__keycache.sort(cmp=self.__cmp, key=self.__key,
                                 reverse=self.__reverse)
        return self.__keycache

    def __invalidate_key_cache(self):
        self.__keycache = None

    def update(self, *args, **kwargs):
        self.__invalidate_key_cache()
        dict.update(self, *args, **kwargs)

    @classmethod
    def fromkeys(cls, iterable, value=None):
        dictionary = cls()
        for key in iterable:
            dictionary[key] = value
        return dictionary

    def copy(self):
        return sorteddict(dict.copy(self), cmp=self.__cmp,
                          key=self.__key, reverse=self.__reverse)

    def clear(self):
        self.__invalidate_key_cache()
        dict.clear(self)

    def setdefault(self, key, value):
        self.__invalidate_key_cache()
        return dict.setdefault(self, key, value)

    def pop(self, key, value=None):
        if key not in self:
            return value
        self.__invalidate_key_cache()
        return dict.pop(self, key, value)

    def popitem(self):
        self.__invalidate_key_cache()
        return dict.popitem(self)

    def keys(self):
        return self.__keys[:]

    def values(self):
        return [self[key] for key in self.__keys]

    def items(self):
        return [(key, self[key]) for key in self.__keys]

    def __iter__(self):
        return iter(self.__keys)

    def iterkeys(self):
        return iter(self.__keys)

    def itervalues(self):
        for key in self.__keys:
            yield self[key]

    def iteritems(self):
        for key in self.__keys:
            yield key, self[key]

    def __delitem__(self, key):
        self.__invalidate_key_cache()
        dict.__delitem__(self, key)

    def __setitem__(self, key, value):
        self.__invalidate_key_cache()
        dict.__setitem__(self, key, value)

    def __repr__(self):
        raise NotImplementedError()

    def __str__(self):
        return "{%s}" % ", ".join(
               ["%r: %r" % (key, self[key]) for key in self.__keys])



From kw at codebykevin.com  Fri Sep 28 17:27:41 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Fri, 28 Sep 2007 17:27:41 -0400
Subject: List search
In-Reply-To: <mailman.1257.1191013432.2658.python-list@python.org>
References: <eafb6$46fd68a3$4275d90a$4234@FUSE.NET>
	<mailman.1257.1191013432.2658.python-list@python.org>
Message-ID: <76859$46fd71d5$4275d90a$5236@FUSE.NET>

Robert Kern wrote:

> line == 'x11'
> 

D'oh! That was simple, wasn't it? *smacks head*

That did the trick. Thanks!

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


From frikimaster at gmail.com  Tue Sep 11 00:58:24 2007
From: frikimaster at gmail.com (Antoni Villalonga)
Date: Tue, 11 Sep 2007 06:58:24 +0200
Subject: urllib2: handle an error (302)
Message-ID: <75eeb70e0709102158m2388e4h5988b0d6433f3bb3@mail.gmail.com>

Hi!

First of all sorry for my English, it's not my language...

When urllib2 libs visit a URL with 302 error follow the location
automatically. I need to get the location  in order to get the full
URL (not relative URL) parsing html code.

You can see an example here:
http://friki.org/302.php raises a "302 error" with
    => Location: "http://friki.cat/test.html"

urllib2 follow the location

In http://friki.cat/test.html i can read a relative link
"/noticies/1.html" but it isn't http://friki.org/noticies/1.html it's
http://friki.cat/noticies/1.html.

I don't know that's the good way to handle this using these libs.
There are any way to handle a 302 error? Can I parse http headers of
the first petition (302 error+location url)?

Sorry again for my English. And sorry if I'm too newbie for this list -_-

Note: Be carefull: "friki.cat" != "friki.org" ;-)


I just write an example code, it get an 404 error because
"http://friki.org/noticia/1.html" don't exist.
"http://friki.cat/noticia/1.html" is the correct link.

302_test.py:
#!/usr/bin/python

import re, cookielib, urllib2

HOST = "http://friki.org"

#Get the homepage
cj = cookielib.MozillaCookieJar()
opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))
r = opener.open(HOST+"/302.php")
data= r.read()

#Follow the link on http source
p = re.compile('href=\"(.*)\"')
m = p.search(data)
LINK = m.group()
LINK = LINK[6:(len(LINK)-1)]

if ("http" != LINK[0:4]):#It just sucks
       LINK = HOST+LINK

print "Visit: "+LINK
r = opener.open(LINK)
data= r.read()
#<--- End of code --->

-- 
"Boring two-person multiplayer may turn friends into enemies."

Antoni Villalonga i Noceras
#Bloc# ~> http://friki.CAT
#Jabber# ~> friki at bulmalug.net


From pavlovevidence at gmail.com  Sat Sep  1 22:31:57 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sat, 1 Sep 2007 22:31:57 -0400
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<1188523589.736146.263510@l22g2000prc.googlegroups.com>
	<1i3o9kr.2gmni61g62moaN%aleax@mac.com>
	<7xwsvcc9yz.fsf@ruckus.brouhaha.com>
	<1i3p8lm.19738kn1q0gkouN%aleax@mac.com>
	<1188587846.687895.69240@q5g2000prf.googlegroups.com>
	<38rmq4-cq.ln1@strongwill.g2ctech>
	<46d903db$0$19580$4c368faf@roadrunner.com>
	<46D98315.4030602@club-internet.fr>
Message-ID: <46da2b31$1$6412$4c368faf@roadrunner.com>

On Sat, 01 Sep 2007 17:19:49 +0200, Pierre Hanser wrote:

> Carl Banks a ?crit :
>> 
>> This is starting to sound silly, people.  Critical is a relative term,
>> and one project's critical may be anothers mundane.  Sure a flaw in
>> your flagship product is a critical problem *for your company*, but are
>> you really trying to say that the criticalness of a bad web search is
>> even comparable to the most important systems on airplanes, nuclear
>> reactors, dams, and so on?  Come on.
> 
> 20 years ago, there was *no* computer at all in nuclear reactors.

But they had electronic (analog) systems that were (supposedly) just as 
heavily regulated and scrutinized as the digital computers of today; and 
were a lot more scrutinized than, say, the digital computers that banks 
were using.


Carl Banks


From steve at REMOVE-THIS-cybersource.com.au  Thu Sep 13 18:26:24 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Thu, 13 Sep 2007 22:26:24 -0000
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr> <fc8fc9$4qa$1@news2.carnet.hr>
	<5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<5ksoaoF5am8cU1@mid.individual.net>
	<1189701793.466307.93210@g4g2000hsf.googlegroups.com>
	<5ktfjqF5ctrvU2@mid.individual.net>
Message-ID: <13eje8gi4nt0j1e@corp.supernews.com>

On Thu, 13 Sep 2007 20:59:06 +0200, Bjoern Schliessmann wrote:

> TheFlyingDutchman wrote:
>> Here's a FAQ item where they refer to it as I think Python should have
>> done it - a special predefined variable:
> 
> Maybe. Personally, I like it the way it is in Python.
> 
> Why don't you make a preprocessor which accepts method declarations
> without "self" and fixes them?


If you look at the thread "parameter list notation" from ten days or so 
ago, TheFlyingDutchman has forked Python and is working on a very special 
new language, PIEthun 3.01B. I for one am looking forward to seeing all 
the very special features of PIEthun.



-- 
Steven.


From alexandre.badez at gmail.com  Tue Sep 25 08:32:21 2007
From: alexandre.badez at gmail.com (Alexandre Badez)
Date: Tue, 25 Sep 2007 12:32:21 -0000
Subject: Raw string printing
In-Reply-To: <fdaum1$gua$01$1@news.t-online.com>
References: <1190722082.406690.222540@57g2000hsv.googlegroups.com>
	<fdaum1$gua$01$1@news.t-online.com>
Message-ID: <1190723541.848558.237890@d55g2000hsg.googlegroups.com>

On Sep 25, 2:24 pm, Peter Otten <__pete... at web.de> wrote:
> Alexandre Badez wrote:
> > I would like to do something like:
>
> > s = r"a\tb\n"
> > print unraw(s) # <= this is the "magic" function I'm searching for
> > # result with
> > a    b
> > n
>
> > Does any of you know how to do it properly ?
> >>> print r"a\tb\nx".decode("string-escape")
>
> a       b
> x
>
> Peter

THANKS :D




From exhuma at gmail.com  Wed Sep 19 09:26:46 2007
From: exhuma at gmail.com (exhuma.twn)
Date: Wed, 19 Sep 2007 06:26:46 -0700
Subject: Keeping a database connection with a Singleton?
Message-ID: <1190208406.041953.115580@g4g2000hsf.googlegroups.com>

I remember reading about the Singleton pattern in python and how it's
an unpythonic pattern and all. At the time I did not need the
Singleton anyways, so I just glanced over the document.

But, setting this aside: I have an application where I have a
connection to a database. At some point in the application I open up a
new window. The new windows resides in a different module. So I have a
directory structure like this:

- mainapp.py
- newwindow.py

So I import "newwindow" in "mainapp"  so I can instantiate and display
it. Meanwhile, the main-app has an open connection to the database.
What's the cleanest way to hand this connection to the new window? I
can see several possibilities:

1) Simply pass the connection as paramtere to the constructor of new-
window.
2) Use the "Singleton" deisign pattern to keep a reference to the
connection
3) Open up a completely new connection to the database in the new
window.

Now, option 1) is clearly the easiest to implement, however, I somehow
tend to use option 2 (the singleton) as it's more flexible. Option 3
looks ugly to me.

This is a stuation I run into many times. And I am always faced with
the same choice. And I never know which one to chose. And now that I
am getting more and more comfortable with the basics of python, I
would like to know if I am missing something more "pythonic".

So, what would you recommend?



From aleax at mac.com  Tue Sep 18 01:31:40 2007
From: aleax at mac.com (Alex Martelli)
Date: Mon, 17 Sep 2007 22:31:40 -0700
Subject: super() doesn't get superclass
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
Message-ID: <1i4lvsx.mhw5621jlsd53N%aleax@mac.com>

Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:

> Am I mistaken in thinking that "superclass of foo" is equivalent to
> "parent class of foo"? If so, I'd lay heavy odds that I'm not alone in
> that thinking.

"That thinking" (confusing "parent" with "ancestor") makes sense only
(if at all) in a single-inheritance world.  Python's super() exists to
support MULTIPLE inheritance.

In general, "a superclass of foo" means "a class X such that foo is a
sublass of X" and thus applies to all parents, all parents of parents,
and so on ("issubclass" does NOT mean "is a DIRECT AND IMMEDIATE
subclass", but "is a subclass"; check the Python builtin function of
that name).


Alex


From danfike at gmail.com  Fri Sep 21 11:11:25 2007
From: danfike at gmail.com (danfike at gmail.com)
Date: Fri, 21 Sep 2007 15:11:25 -0000
Subject: Building Python with VC8 on x64 Vista
In-Reply-To: <1190299551.573204.322440@57g2000hsv.googlegroups.com>
References: <1190299551.573204.322440@57g2000hsv.googlegroups.com>
Message-ID: <1190387485.939915.171760@19g2000hsx.googlegroups.com>

On Sep 20, 9:45 am, danf... at gmail.com wrote:
> Hi all,
>
> So I'm working on a C++ application that will eventually embed or
> extend Python using Boost.Python, but I first need to get Python
> compiled correctly for my platform. I've got a Windows Vista 64-bit
> machine with a Core 2 processor, and I'm compiling with a VC8.
>
> I downloaded the Python 2.5.1 source from python.org, and I opened the
> Visual Studio solution file that was in the PCbuild8 directory. I
> created a new x64 platform and managed to successfully compile the
> 'pythoncore' and 'python' projects (both in Debug and Release
> configurations), resulting in working executables. (Aside: When
> launched, the python console says "Python 2.5.1 [MSC v.1400 64 bit
> (AMD64)] on win32" up top. Does that seem right?)
>
> So, this program I'm writing with Boost.Python (that worked correctly
> on x86 with home-built libraries) won't compile with these x64
> libraries. I keep getting 'unresolved external symbols.' But, I'm
> certain I'm linking in the library correctly. Here's a snippet from
> the output (with /verbose:lib) when compiling:
>
> 1>Searching libraries
> 1>    <snip>
> 1>    Searching ..\..\..\3rdParty\boost_1_34_0\lib_x64\libboost_python-
> vc80-mt-gy-1_34.lib:
> 1>    <snip>
> 1>    Searching ..\..\..\3rdParty\Python25\libs_x64\python25_d.lib:
> 1>Finished searching libraries
> 1>py_dyn_test.obj : error LNK2001: unresolved external symbol
> _Py_NoneStruct
> 1>vector_py.obj : error LNK2001: unresolved external symbol
> _Py_NoneStruct
> 1>volume_py.obj : error LNK2001: unresolved external symbol
> _Py_NoneStruct
> 1>py_dyn_test.obj : error LNK2001: unresolved external symbol
> _Py_RefTotal
> 1>vector_py.obj : error LNK2001: unresolved external symbol
> _Py_RefTotal
> 1>volume_py.obj : error LNK2001: unresolved external symbol
> _Py_RefTotal
> 1>volume_py.obj : error LNK2001: unresolved external symbol
> PyExc_IndexError
>
> If I switch to the Release configuration, I see fewer errors:
>
> 1>py_dyn_test.obj : error LNK2001: unresolved external symbol
> _Py_NoneStruct
> 1>volume_py.obj : error LNK2001: unresolved external symbol
> PyExc_IndexError
>
> Note that none of my own code is Debug-specific. Also, the code in my
> files is correct, because (as stated above), it worked fine for x86.
>
> Though I don't know how useful it is, I did open the python libraries
> in wordpad, and though most of the file wasn't legible, I did find
> strings "Py_NoneStruct," "Py_RefTotal," and "PyExc_IndexError."
>
> I suspect that I set up my "x64" platform configuration incorrectly,
> or missed something. It's basically the same as the Win32
> configuration, except with the /MACHINE:X64 flag instead of /
> MACHINE:X86. One of the things I'm noticing just now, as I post this,
> is that the preprocessor flag "WIN32" is still defined in the x64
> configuration. Maybe if I change that to "WIN64," I'll have better
> luck.
>
> Any advice you have on what the "correct" way to do this is would be
> appreciated.
>
> -Dan

I've tried re-building my libraries from the latest revision (58225),
using the solution in the PCbuild8 folder. I had no problems getting
the python25[_d].lib to compile, but I still get these symbol errors
when I try to link with the library.

-Dan



From gagsl-py2 at yahoo.com.ar  Thu Sep 27 02:17:36 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 27 Sep 2007 03:17:36 -0300
Subject: Using closures and partial functions to eliminate redundant code
References: <N9EKi.37131$RX.19410@newssvr11.news.prodigy.net>
Message-ID: <op.tzaufmdnx6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 26 Sep 2007 23:01:17 -0300, Matthew Wilson <matt at tplus1.com>  
escribi?:

> I wrote some code to create a user and update a user on a remote box by
> sending emails to that remote box.  When I was done, I realized that my
> create_user function and my update_user function were effectively
> identical except for different docstrings and a single different value
> inside:

I would have used an object with two methods... But this is just another  
example of the closure/object dichotomy. Some enlightment:
http://people.csail.mit.edu/gregs/ll1-discuss-archive-html/msg03277.html

-- 
Gabriel Genellina



From f.guerrieri at gmail.com  Wed Sep 19 10:41:43 2007
From: f.guerrieri at gmail.com (Francesco Guerrieri)
Date: Wed, 19 Sep 2007 16:41:43 +0200
Subject: Find the ID, but how to select/copy the whole string by ID?
In-Reply-To: <1190209195.493784.133340@q3g2000prf.googlegroups.com>
References: <1190209195.493784.133340@q3g2000prf.googlegroups.com>
Message-ID: <79b79e730709190741i2deb95c8m2982b3201a3fc4be@mail.gmail.com>

On 9/19/07, Leon <mingliang2000 at gmail.com> wrote:
> stringID = str(raw_input('Enter the string ID : '))
> file = open('strings.txt')
> sourcefile = file.read()
> file.close()
> sourcefile.find (stringID)
>
> but how can I select and copy the specific string from <str> to </str>
> with id I input?

If the file you are parsing is in xml, there are many parser out there
which can help you (this is discussed very often on this list, even
today) .

If the format is very simple and you really want to do it by hand, you
could do something like:

stringID = raw_input('Enter the string ID:')
for line in open('strings.txt'):
    if line.find(stringID) > -1:
        print 'Found!'

Note that find returns the index where the substring you look for is
found, and it returns -1 if the substring is not found. The problem is
that -1 is a valid index to refer to a character in a string (actually
it refers to the last character of the string), so be careful with
interpreting the results of the find method.

francesco


From martin at v.loewis.de  Tue Sep  4 13:10:06 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 04 Sep 2007 19:10:06 +0200
Subject: Parse or Pass?
In-Reply-To: <mailman.28.1188917501.2658.python-list@python.org>
References: <1188917032.271543.236420@d55g2000hsg.googlegroups.com>
	<mailman.28.1188917501.2658.python-list@python.org>
Message-ID: <46DD916E.4000201@v.loewis.de>

> In general, "parsing" is analyzing the grammatical structure of a
> string. People sometimes talk loosely about "parsing the command line".
> but I don't think that's normally applied to providing the actual
> arguments (corresponding to the definition's "formal parameters") when a
> function is called - that's argument passing.

I find that people often use "parsing" in contexts where my
(non-native) language feeling says it should not be used.

For example, people talk about "parsing" trees, meaning that
they perform some processing on the tree with the objective
of extracting certain information. In the same sense, I
have seen people "parsing" lists - meaning they iterate over
the list.

If I extrapolate my experience with German IT language, I
think people often use terminology they have not fully
understood. I often ask my students what the difference
between "eingeben", "ausgeben", "?bergeben" und
"zur?ckgeben" is when they start saying that "die
Funktion gibt das Ergebnis aus".

Regards,
Martin


From wmcclain at salamander.com  Thu Sep 20 09:29:47 2007
From: wmcclain at salamander.com (Bill McClain)
Date: 20 Sep 2007 13:29:47 GMT
Subject: Freetype bindings, finally?
References: <1190225043.731294.7050@19g2000hsx.googlegroups.com>
Message-ID: <fctskb0p9e@news3.newsguy.com>

On 2007-09-19, Jason Yamada-Hanff <jyamada1 at gmail.com> wrote:
> Hi all,

> I'm working on a project that would benefit very much from Python
> Freetype2 bindings (the Fonty Python project).  I don't want to
> duplicate efforts and wrap the library again if we don't have to.
> Interestingly, it seems like there have been lots of attempts at doing
> this.

I would like a freetype library as well, but neither have I done Python/C
interfaces. 

If you have time to put into this, I would suggest starting a mailing list on
the project, as well as continuing the discussion here. I would certainly
susbscribe, and contribute as time and talent permit.

-Bill
-- 
Sattre Press                                      Tales of War
http://sattre-press.com/                       by Lord Dunsany
info at sattre-press.com         http://sattre-press.com/tow.html


From kyosohma at gmail.com  Wed Sep 12 09:17:53 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 12 Sep 2007 13:17:53 -0000
Subject: Basic GUI
In-Reply-To: <1189569282.372083.264560@57g2000hsv.googlegroups.com>
References: <1189569282.372083.264560@57g2000hsv.googlegroups.com>
Message-ID: <1189603073.639193.193390@19g2000hsx.googlegroups.com>

Don,

On Sep 11, 10:54 pm, Don Hanlen <dhan... at owt.com> wrote:
> I'm writing a simple GUI that:
>     ..gets info via telnet protocol (and sends)
>     ..gets info via http (and sends)
>     ..gets user-info from (currently)
>         ...Tkinter Text windoze
>         ...Tkinter buttons and such
>     ..displays info in various Tkinter windoze
>         ...graphic AND text...
>
> I can accomplish all of these functions individually and now seem to
> need to set up multi-processes to combine 'em.  Back in my C days, I'd
> have used fork/exec to do so, but I'm confused by the number of
> modules available in Python.  Is there a "best" for portability and
> simplicity?  (Or am I on the wrong track here?)
>
> I could solve my problems with the following psuedo-code made into
> real code:
> ----
>     import blah
>
>     t = blah.fork(runthisprogram.py)
>
>     #OK still in main
>     t.sendinfo(info)
>     info = t.receiveinfo()
> ----
>     #runthisprogram.py
>     def sendinfobacktopapa():
>         ? eventhere
>     def getinfofrompapa():
>         ? eventhere
> ----
>
> It seems to me that propagating events *may* be the best way to
> communicate.  I'm wide open, including to non-multi-process solutions.
>
> Thanks for your comments, I searched old posts for a while, various
> other Python info-sources, and couldn't find an answer.
> --
> don


You can also use threads, which is a little bit more portable than
using Python's fork methodology, or so I've read. The concepts on this
page can be applied to any GUI toolkit you choose:
http://wiki.wxpython.org/LongRunningTasks

I've used them with wxPython, but iirc, Lutz does something quite
similar with Tkinter in his latest edition of "Programming Python".

I think what Michele is referring to is the subprocess module, which
is also useful.

Mike



From aleax at mac.com  Sun Sep 16 15:14:47 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 16 Sep 2007 12:14:47 -0700
Subject: how to join array of integers?
References: <1189859762.563599.269270@g4g2000hsf.googlegroups.com>
	<a23effaf0709150551g19c611eqe1c912acf02306d3@mail.gmail.com>
	<mailman.577.1189864628.2658.python-list@python.org>
	<13eos6ihf2mjg4a@corp.supernews.com> <87lkb6o4bx.fsf@rudin.co.uk>
Message-ID: <1i4j87a.vzt23lrho9wbN%aleax@mac.com>

Paul Rudin <paul.nospam at rudin.co.uk> wrote:
   ...
> Isn't it odd that the generator isn't faster, since the comprehension
> presumably builds a list first and then iterates over it, whereas the
> generator doesn't need to make a list?

The generator doesn't, but the implementation of join then does
(almost).  See Objects/stringobject.c line 1745:

        seq = PySequence_Fast(orig, "");

As per <http://docs.python.org/api/sequence.html>,
"""
PyObject* PySequence_Fast(PyObject *o, const char *m)

Return value: New reference.

Returns the sequence o as a tuple, unless it is already a tuple or list,
in which case o is returned. Use PySequence_Fast_GET_ITEM() to access
the members of the result. Returns NULL on failure. If the object is not
a sequence, raises TypeError with m as the message text.
"""

If orig is neither a list nor a tuple, but for example a generator,
PySequence_Fast builds a list from it (even though its docs which I just
quoted says it builds a tuple -- building the list is clearly the right
choice, so I'd say it's the docs that are wrong, not the code;-)... so
in this particular case the usual advantage of the generator disappears.

PySequence_fast is called in 13 separate spots in 8 C files in the
Python 2.5 sources, so there may a few more surprises like this;-).


Alex
 


From bj_666 at gmx.net  Sat Sep 22 04:40:53 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 22 Sep 2007 08:40:53 GMT
Subject: Would Anonymous Functions Help in Learning Programming/Python?
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<1190413322.962737.53900@r29g2000hsg.googlegroups.com>
	<1190414192.636397.146450@57g2000hsv.googlegroups.com>
	<1190443748.907702.154660@22g2000hsm.googlegroups.com>
	<7xlkazgpc5.fsf@ruckus.brouhaha.com>
	<1190447257.060479.141280@n39g2000hsh.googlegroups.com>
Message-ID: <5lk2olF8gic1U5@mid.uni-berlin.de>

On Sat, 22 Sep 2007 00:47:37 -0700, Kay Schluehr wrote:

> On 22 Sep., 08:56, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
>> Kay Schluehr <kay.schlu... at gmx.net> writes:
>> > If you feel you can transform it into another unambigous grammar
>> > mixing statements and expressions it's up to you.
>>
>> We got rid of the print statement for python 3.0.  Why not get rid
>> of the rest of them too?  Just use expressions for everything, as
>> works fine for plenty of other languages.
> 
> One might create a new dynamic functional+OO programming language,
> where small statements like print, assert, raise etc. all become
> functions and statements like while, for, with etc. become anonymous
> closures.

Before someone starts to create such a thing he should take a look at Io
which has just objects and methods.

  http://www.iolanguage.com/

Ciao,
	Marc 'BlackJack' Rintsch


From jkn_gg at nicorp.f9.co.uk  Wed Sep 12 07:06:40 2007
From: jkn_gg at nicorp.f9.co.uk (jkn)
Date: Wed, 12 Sep 2007 04:06:40 -0700
Subject: Generating HTML
In-Reply-To: <mailman.429.1189582623.2658.python-list@python.org>
References: <9e2f512b0709112133l41ce5ef1g815962a81becf6b9@mail.gmail.com>
	<mailman.429.1189582623.2658.python-list@python.org>
Message-ID: <1189595200.209044.267390@d55g2000hsg.googlegroups.com>

I used to use Cheetah, but have switched recently to Jinja:

http://jinja.pocoo.org/

Mainly this is because the syntax is similar to Django's templates,
and eventually I plan on migrating to Django.

    jon N



From arnodel at googlemail.com  Sun Sep  2 10:53:29 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 02 Sep 2007 07:53:29 -0700
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
In-Reply-To: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
Message-ID: <1188744809.834366.22490@19g2000hsx.googlegroups.com>

On Sep 2, 12:51 pm, jwrweather... at gmail.com wrote:
[...]
> The resulting executable takes 0.24 seconds to run. I'm not expecting
> a scripting language to run faster than native code, but I was
> surprised at how much slower it was in this case. Any ideas as to what
> is causing python so much trouble in the above code?

Sorry I didn't answer your question at all in my previous post
(although my modified method gets the answer in about 6s on a measly
PB G4 1GHz :).
Your little code snippet is just about the worst bit of code for
python to be compared to C.  Three loops, only integer arithmetic:
that's not going to make Python shine!

Nevertheless as you optimise your C snippet (-O3), there are probably
a few things that the compiler does for you:

* as in the inner loop, a*a + b*b always remain the same, it is
probably stored in a register once and for all
* in the second loop, a*a remains the same so it might be calculated
once and for all as well.

It gives this:

M = 1000
solutions = [0] * M

def f1():
    "Your original implementation"
    for a in xrange(1, M):
        for b in xrange(1, M - a):
            for c in xrange(1, M - a - b):
                if a**2 + b**2 == c**2:
                    solutions[a+b+c] += 1

def f2():
    "a*a + b*b precalculated"
    for a in xrange(1, M):
    a2 = a*a
        for b in xrange(1, M - a):
            s = a2 + b*b
            for c in xrange(1, M - a - b):
                if s == c*c:
                    solutions[a+b+c] += 1

It doesn't make it as quick as C of course, but more than halves the
execution time.

--
Arnaud




From lolu999 at gmail.com  Sat Sep  8 14:02:44 2007
From: lolu999 at gmail.com (lolu999 at gmail.com)
Date: Sat, 08 Sep 2007 11:02:44 -0700
Subject: How to insert in a string @ a index
Message-ID: <1189274564.462664.131240@22g2000hsm.googlegroups.com>

Hi;

I'm trying to insert XYZ before a keyword in a string. The first and
the last occurence of hello in the string t1 (t1="hello world hello.
hello \nwhy world hello") are keywords. So after the insertion of XYZ
in this string, the result should be t1 = "XYZhello world hello. hello
\nwhy world XYZhello"

The python doesn't supports t1[keyword_index]="XYZhello" (string
object assignment is not supported). How do I get to this problem? Any
sugguestions?

-a.m.



From saptarshi.guha at gmail.com  Thu Sep 20 19:00:36 2007
From: saptarshi.guha at gmail.com (sapsi)
Date: Thu, 20 Sep 2007 16:00:36 -0700
Subject: Python,SWIG and libjvm
Message-ID: <1190329236.398635.226020@y42g2000hsy.googlegroups.com>

Hello,
I'm not sure if this the correct list but here goes (and sorry for the
noise). I've been attempting to wrap python around libhdfs.
So far so good (i've attached the SWIG template at the end). The
compilation works without errors and the shared objects do have
references to all the functions.

However, when importing into python

import pyhdfs

i get the following error:

Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/home/sguha/tmp/b/hdfs.py", line 7, in ?
    import _hdfs
ImportError: libjvm.so: cannot open shared object file: No such file
or directory

However, libjvm.so is located in /home/sguha/mine/jdk1.6.0_02/jre/lib/
amd64/server which is present in the PYTHONPATH and sys.path.
I can understand it complaining <i>while</i> loading the libjvm.so
but python doesn't locate it even when in the path.

As an aside, the build command for hdfs.c has "   -ljvm  " - this
should affect SWIG, right? Meaning if my program (e.g) links to a
library and i want a wrapper around my program (to python) i need SWIG
templates for my headers only and not for the linked library...right?
( I guess the answer is i dont otherwise that would be quite a
nightmare of work)

Thank you for your time
Saptarshi


Attachments:
SWIG template
%module pyhdfs

%{
#include "hdfs.h"
%}

%include "hdfs.h"



From pavlovevidence at gmail.com  Sat Sep 22 07:04:46 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sat, 22 Sep 2007 07:04:46 -0400
Subject: Would Anonymous Functions Help in Learning Programming/Python?
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<46f45f02$0$15350$4c368faf@roadrunner.com>
	<7xps0bgq6p.fsf@ruckus.brouhaha.com>
	<46f4dd90$0$32490$4c368faf@roadrunner.com>
	<7x64232ggh.fsf@ruckus.brouhaha.com>
Message-ID: <46f4f9b1$0$17119$4c368faf@roadrunner.com>

On Sat, 22 Sep 2007 02:32:30 -0700, Paul Rubin wrote:

> Carl Banks <pavlovevidence at gmail.com> writes:
>> That's it, lost me already.  You ever see the kinds of programs
>> mechanical engineers write?  It isn't software.
> 
> They do a lot of number crunching.  Certainly they can appreciate higher
> order functions like integrate(f, x0, x1) to integrate the function f
> from x0 to x1; or diff(f, x0) to find the derivative of f at x0; etc. 
> Fortran had cheesy ways to do this as far back as the 1950's.

Well, I appreaciate it, as do many other engineers, but for a lot of 
engineers functional programming might as well not exist, either because 
they don't about it or don't care about it.  And it doesn't really affect 
them much, other than making them slightly less efficient then they could 
have been.  That's the key here.


Carl Banks


From steven.bethard at gmail.com  Tue Sep 25 14:58:36 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 25 Sep 2007 12:58:36 -0600
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <1190744523.025029.227690@k79g2000hse.googlegroups.com>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
Message-ID: <2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>

Paul Hankin wrote:
> On Sep 25, 12:51 pm, Mark Summerfield <m.n.summerfi... at googlemail.com>
> wrote:
>> On 25 Sep, 12:19, Paul Hankin <paul.han... at gmail.com> wrote:
>>
>>
>>
>>> Recall sorted...
>>>     sorted(iterable, cmp=None, key=None, reverse=False) --> new sorted
>>> list
>>> So why not construct sorteddicts using the same idea of sortedness?
>>> sorteddict((mapping | sequence | nothing), cmp=None, key=None,
>>> reverse=None)
>>> Then we can specify the exact behaviour of sorteddicts: it's the same
>>> as a regular dict, except when the order of keys is important they're
>>> ordered as if they were sorted by sorted(keys, cmp=sd._cmp,
>>> key=sd._key, reverse=sd._reverse). Here I imagine cmp, key and reverse
>>> are stored in the new sorteddict as attributes _cmp, _key, _reverse -
>>> obviously the actual implementation may differ.
>>> This has the benefit of making sorteddict's behaviour explicit and
>>> easy to understand, and doesn't introduce a new sorting API when we
>>> already have a perfectly decent one.
>>> The only problem here is the **kwargs form of the dict constructor
>>> doesn't translate as we're using keyword args to pass in the sort
>>> criterion. Perhaps someone has an idea of how this can be solved. If
>>> nothing else, this constructor could be dropped for sorteddicts, and
>>> sorteddict(dict(**kwargs), cmp=..., key=..., reverse=...) when that
>>> behaviour is wanted.
>>> I don't like the integral indexing idea or the slicing: indexing and
>>> slicing are already part of python and it's bad to have different
>>> syntax for the same concept on sorteddicts. I'd say it's not an
>>> important enough for sorteddicts anyway.
>>> --
>>> Paul Hankin
>> This makes a lot of sense to me. But how do you envisage it would be
>> implemented?
> 
> Here's a first go. Sorting occurs when the keys are iterated over,
> making it fast (almost as a dict) for construction, insertion, and
> deletion, but slow if you're iterating a lot. You should look at some
> use cases to decide if this approach is best, or if a sorted
> datastructure should be used instead, but my instinct is that this is
> a decent approach. Certainly, you're unlikely to get a simpler
> implementation :)
> 
> class sorteddict(dict):
>     "A sorted dictionary"
>     def __init__(self, arg=None, cmp=None, key=None, reverse=False):
>         if arg:
>             super(sorteddict, self).__init__(arg)
>         else:
>             super(sorteddict, self).__init__()
>         self._cmp = cmp
>         self._key = key
>         self._reverse = reverse
>     def keys(self):
>         return sorted(super(sorteddict, self).keys(), cmp=self._cmp,
>             key=self._key, reverse=self._reverse)
>     def iter_keys(self):
>         return (s for s in self.keys())
>     def items(self):
>         return [(key, self[key]) for key in self.keys()]
>     def iter_items(self):
>         return ((key, self[key]) for key in self.keys())
>     def values(self):
>         return [self[key] for key in self.keys()]
>     def iter_values(self):
>         return (self[key] for key in self.keys())
>     def __str__(self):
>         return '{' + ', '.join('%s: %s' % (repr(k), repr(v))
>             for k, v in self.iter_items()) + '}'
>     def __repr__(self):
>         return str(self)
>     def __iter__(self):
>         return self.iter_keys()

With this is the implementation, I'm definitely -1. Not because it's a 
bad implementation, but because if the iteration is always doing a sort, 
then there's no reason for a separate data structure. Just use sorted() 
directly on a regular dict. That has the advantage of being much more 
obvious about where the expensive operations are::

     for key in sorted(d, ...):
         ... whatever you want to do ...

IMHO, the only reason to introduce a sorteddict() is if it minimizes the 
cost of sorting the keys.

STeVe


From http  Wed Sep  5 01:01:47 2007
From: http (Paul Rubin)
Date: 04 Sep 2007 22:01:47 -0700
Subject: Does shuffle() produce uniform result ?
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
	<mailman.243.1187955760.32294.python-list@python.org>
	<tooru_honda-7C82D1.10432725082007@wvnews01.netvigator.com>
	<tooru_honda-58C552.20355225082007@wvnews01.netvigator.com>
	<tooru_honda-978B9E.11304526082007@wvnews01.netvigator.com>
	<slrnfdnojg.inr.apardon@rcpc42.vub.ac.be>
	<7xejhfbsjo.fsf@ruckus.brouhaha.com>
	<slrnfdpup6.inr.apardon@rcpc42.vub.ac.be>
	<7xabs39bin.fsf@ruckus.brouhaha.com>
	<13drijhfqlvlk96@corp.supernews.com>
Message-ID: <7xwsv53dtw.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> writes:
> > Right.  The idea is that those attacks don't exist and therefore the
> > output is computationally indistinguishable from random.
> 
> It is a huge leap from what the man page says, that they don't exist in 
> the unclassified literature at the time the docs were written, to what 
> you're saying, that they don't exist.

OK.  /dev/random vs /dev/urandom is a perennial topic in sci.crypt and
there are endless long threads about it there, so I tried to give you
the short version, but will give a somewhat longer version here.

There can't be an actual security proof without also proving P!=NP;
however, the cryptographic part of /dev/urandom is designed pretty
conservatively and seems to be in good shape even after all these years.

> The man page is clear: there is a possible vulnerability in /dev/urandom. 

There is the theoretical possibility of such a vulnerability, however
it also applies to /dev/random.  Note that the man page is neither a
kernel internals document nor a cryptography textbook, so it doesn't
describe the algorithm or the theory behind it.  For that you have to
look at the source code and the cryptographic literature, respectively.

For the random.c source code, see

  http://www.cs.berkeley.edu/~daw/rnd/linux-rand

It's an old version but hasn't changed all that much since then AFAIK.
There is a long comment at the top explaining how it works.  Short
version: /dev/random reads data from a bunch of stochastic sources
around the system (e.g. things like mouse motion) and makes a
seat-of-the-pants estimate of the amount of entropy coming from the
sources.  The sources are not considered to be uniform or
uncorrelated; they're just supposed to contain entropy.  The entropy
is distilled through a cryptographic hash function before being sent
out the API.  /dev/random throttles its output so that the number of
bits emitted is always lower than the estimated input entropy.
/dev/urandom is the same but doesn't do this throttling.

For the theory of what we hope (but have not proved) that these hash
functions do, see for example the HMAC papers:

    http://www-cse.ucsd.edu/~mihir/papers/hmac.html

> Any cryptographer worth his salt (pun intended) would be looking to close 
> that vulnerability BEFORE an attack is made public, and not just wait for 
> the attack to trickle down from the NSA to the script kiddies. The time 
> to close the stable door is _before_ the horse gets away.

No really, these functions are very well studied, in fact there are
known ways to construct collisions in the md5 compression function but
that doesn't appear to be of any use against how random.c uses it.

> I agree that this flaw doesn't sound like it will effect the application 
> being discussed, but a problem has already been found and a solution is 
> already known: block until there's enough entropy. That's what /dev/
> random does.

No, having enough entropy does NOT guarantee indistinguishability from
randomness.  Think of a 60-40 biased coin.  Each flip gives you 0.97
bits of entropy, so if you want 64 bits of entropy, 66 flips gives it
to you.  But it's very easy to spot the 60-40 bias and see that the
flips are not drawn uniformly from {heads,tails}.  Running the flips
through MD5 experimentally appears to get rid of any correlation
(except for some very tricky adversarial constructions based on
controlling the input) so that is what /dev/random does.  But that is
the exact same thing that urandom does.  It's possible that some
as-yet-unknown attack can find correlations in the md5 output and also
in SHA256 or whatever.

More recently there's been some theoretical advances, see these:

   http://en.wikipedia.org/wiki/Extractor
   http://citeseer.ist.psu.edu/barak03true.html

so maybe that stuff can be used in implementations.  I haven't looked
into it enough to know if it makes sense.  Chapter 10 of Schneier and
Ferguson's "Practical Cryptography" also discusses how to write these
system-level PRNG's.

> That doesn't follow. Antoon is specifically warning that /dev/urandom is 
> non-blocking. If you knew there was enough entropy available, you 
> wouldn't need /dev/random -- but how do you know there's enough entropy?

/dev/urandom can in fact screw you if you try to use it before the
system has gathered enough entropy to give good output, such as while
the system is still booting up.  That is not a cryptographic algorithm
vulnerability.  It could also screw you if your system is somehow
leaking information about its entropy pool (say through
electromagnetic emissions from the memory bus).  That is also not a
cryptographic algorithm vulnerability.  /dev/random does protect you
somewhat from both of these screws.  /dev/random does NOT protect you
against sufficiently strong hypothetical attacks against the crypto
algorithm.

Overall, the situation is:

 1) /dev/urandom is slightly bogus because it can produce output when
    there's almost no entropy in the system, i.e. during boot or
    immediately after boot.  But once the system has been running
    for a while, the urandom output (in a real PC) is pretty good.

 2) /dev/random is somewhat more bogus because it blocks when it's
    capable of producing good (computationally secure) output.  Note
    that /dev/random's entropy estimates could in fact be wrong--for
    example, in a virtual PC (say a simulated one), there might be ZERO
    actual entropy (restarting the simulation might get you back to 
    exactly the same state).

 3) /dev/random and /dev/urandom are in principle BOTH vulnerable to
    cryptographic attacks.  Some people incorrectly assume that this
    doesn't apply to /dev/random.  So from an information-theoretic
    point of view, /dev/random and /dev/urandom are both bogus, but
    from a computational security point of view, the algorithms look
    ok (as best as we can tell), and if anything is irreparably wrong
    with them then all of cryptography is in trouble, so really neither
    is bogus in this regard.

 4) The man page is fairly seriously bogus because it doesn't explain
    the real situation with either /dev/urandom or /dev/random.

 5) Really, these modern algorithms are much harder to attack than
    fans of pre-computer (e.g. WW2-era) cryptography seem to imagine.
    These algorithms are very fast on modern computers but wouldn't
    have been practical without computers.  Computers have extended
    the capabilities of both attackers and defenders, but it looks
    like they've given a lot more to the defenders (see Kahn "The
    Codebreakers" 2nd ed. note at the end: it says something like
    "in the long-running battle between cryptographers and cryptanalysts,
    it looks like the cryptographers have won).

 6) For a sort of philosophical note on how cryptography fits in with
    the P vs. NP problem, this article is pretty cool:

       http://www.cs.ucsd.edu/users/russell/average.ps

    A brief summary is at:

       http://weblog.fortnow.com/2004/06/impagliazzos-five-worlds.html

> For this specific application, it probably doesn't matter -- using /dev/
> urandom is surely overkill, and on a single-user Linux desktop you're 
> unlikely to have vast numbers of applications reading /dev/urandom 
> without your knowledge. But why not use /dev/random? What's the downside?

/dev/random is in fact quite slow, like a few bits per second, not
practical for dealing zillions of poker hands or whatever this
application was.  Once you exhaust the stored pool (a few hundred
bytes or whatever) it takes quite a long time to get any more output.
Also, it doesn't give the theoretical guarantees that some people
imagine that it does.  Aside from that, it's indistinguishable from
/dev/urandom once /dev/urandom has enough entropy to get started.

The right way for /dev/*random to work is block after system boot
until there is some reasonable fixed amount of entropy (say 256 bits)
gathered, then produce unlimited output without ever blocking again.
Some ongoing folding of new entropy into the entropy pool (see the
Fortuna algorithm in Schneier and Ferguson) is a good practical
precaution, but really high security applications should consider the
whole PC memory and CPU buses to be an insecure broadcast medium
anyway, so such applications generally do their most sensitive
operations in dedicated secure hardware.

Sorry to go on for so long but it connects to a never-ending source of
bogosity on sci.crypt (the other newsgroup I mostly hang out in),
where several times a year someone shows up selling some bogus
one-time-pad product based on supposed information-theoretic security,
they're misguided 100% of the time and get shot down, but it always
takes a while.  My guess is that one of them is responsible for the
ongoing sci.crypt sporge attack.


From wizzardx at gmail.com  Tue Sep 11 07:29:29 2007
From: wizzardx at gmail.com (David)
Date: Tue, 11 Sep 2007 13:29:29 +0200
Subject: Python Database Apps
In-Reply-To: <1189479130.905136.196820@r34g2000hsd.googlegroups.com>
References: <1189479130.905136.196820@r34g2000hsd.googlegroups.com>
Message-ID: <18c1e6480709110429i73bf7b40n902e3ac4b7c13e86@mail.gmail.com>

> What is your favorite python - database combination?  I'm looking to
> make an app that has a local DB and a server side DB.  I'm looking at
> python and sqlite local side and sql server side.
>
> Any suggestions????

I like to use elixir [1] on top of sqlalchemy [2]

[1] http://elixir.ematia.de/
[2] http://www.sqlalchemy.org/


From ldo at geek-central.gen.new_zealand  Tue Sep  4 23:11:42 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Wed, 05 Sep 2007 15:11:42 +1200
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<87hcmhebwv.fsf@benfinney.id.au> <5jn9qgFdmbcU3@mid.uni-berlin.de>
	<1188886461.236237.168230@y42g2000hsy.googlegroups.com>
Message-ID: <fbl6pe$2vd$1@lust.ihug.co.nz>

In message <1188886461.236237.168230 at y42g2000hsy.googlegroups.com>, Jason
wrote:

> The reason why the exception is more Pythonic is that the return value
> is always a guaranteed good index into the list.

How do you explain dict.get, then?


From siona at chiark.greenend.org.uk  Mon Sep 10 09:19:08 2007
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 10 Sep 2007 14:19:08 +0100 (BST)
Subject: /dev/null as a file-like object, or logging to nothing
References: <87k5r1jdzq.fsf@wilson.homeunix.com>
	<5kg48jF33dv5U3@mid.uni-berlin.de>
	<87fy1pjbpl.fsf@wilson.homeunix.com>
Message-ID: <uxv*tevUr@news.chiark.greenend.org.uk>

Torsten Bronger  <bronger at physik.rwth-aachen.de> wrote:
>Marc 'BlackJack' Rintsch writes:
>> `os.devnull`?
>Yes, but I wasn't really sure how portable it is, in particular, on
>Windows.

Windows has a NUL: device which behaves like /dev/null .
os.devnull is a wrapper around whatever the system-provided null
device is. I guess the documentation should reflect this, rather
than just mentioning POSIX and Mac OS 9 and requiring you to note
the "defined for all platforms" at the start of the section.

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
   "Frankly I have no feelings towards penguins one way or the other"
        -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From andrew.lee at nymag.com  Wed Sep 12 18:13:58 2007
From: andrew.lee at nymag.com (Andrew F)
Date: Wed, 12 Sep 2007 15:13:58 -0700
Subject: Error in random module, bad installation?
Message-ID: <1189635238.655642.233240@g4g2000hsf.googlegroups.com>

I'm a linux user and I just upgraded from 2.1 to 2.5 and changed the
location of a number of libraries and tools.

So far I've tracked most errors, but this one has me scratching my
head :

$ which python
/usr/local/bin/python
$ echo $PYTHONPATH
/usr/local/bin/python
$ python
Python 2.5.1 (r251:54863, Sep  5 2007, 09:48:37)
[GCC 3.4.6 20060404 (Red Hat 3.4.6-8)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import random
Unexpected error: <type 'exceptions.TypeError'>
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "random.py", line 10, in <module>
    x = random.random()
TypeError: 'module' object is not callable
>>>

$ find /usr/local/ -name random.py
./lib/python2.5/random.py
./lib/python2.3/random.py

Do I need to clobber 2.3?  ( If so, why???)

TIA

-- Andrew



From ed at leafe.com  Tue Sep 11 09:25:54 2007
From: ed at leafe.com (Ed Leafe)
Date: Tue, 11 Sep 2007 09:25:54 -0400
Subject: Python Database Apps
In-Reply-To: <1189479130.905136.196820@r34g2000hsd.googlegroups.com>
References: <1189479130.905136.196820@r34g2000hsd.googlegroups.com>
Message-ID: <8AFA4F37-F8E1-47C4-B50A-BF26A0FAAA43@leafe.com>

On Sep 10, 2007, at 10:52 PM, darien.watkins at gmail.com wrote:

> Kindof a poll, kindof curiosity...
>
> What is your favorite python - database combination?  I'm looking to
> make an app that has a local DB and a server side DB.  I'm looking at
> python and sqlite local side and sql server side.

	Are you asking for opinions on what sort of database engine to use?  
Or are you trying to get a feel for what people use to develop their  
apps? Are you looking for a web app, or a desktop app, or a non-UI app?

-- Ed Leafe
-- http://leafe.com
-- http://dabodev.com




From jstroud at mbi.ucla.edu  Fri Sep 14 15:25:22 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 14 Sep 2007 12:25:22 -0700
Subject: An ordered dictionary for the Python library?
In-Reply-To: <1189753968.917636.310120@19g2000hsx.googlegroups.com>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<7xzlzrtrjn.fsf@ruckus.brouhaha.com>
	<1189664832.876539.86800@k79g2000hse.googlegroups.com>
	<7xps0mmig9.fsf@ruckus.brouhaha.com>
	<1189733708.659317.83950@y42g2000hsy.googlegroups.com>
	<1189753968.917636.310120@19g2000hsx.googlegroups.com>
Message-ID: <fcemqi$g76$1@daisy.noc.ucla.edu>

Mark Summerfield wrote:
> So to clarify, here's the entire API I'm proposing for ordereddict. In
> all cases the ordereddict is always in (and kept in) key order, and
> any method that returns a list or iterator always returns that list or
> iterator (whether of keys or values) in key order:
> 
> ordereddict(dictionary=None)
>     The argument can be a dict or another ordereddict; all the dict()
> initializer
>     approaches should also be supported.
> 
> ordereddict.update(dictonary=None, **kwargs)
>     Same as dict.update()---except that key order is preserved (a
> point I won't
>     repeat in the others when I say "same as dict", but which is true
> throughout)
> 
> @classmethod
> ordereddict.fromkeys(cls, iterable, value=None) # Same as dict
> 
> ordereddict.key(index : int) -> key
>     Returns the index-th item's key
> 
> ordereddict.item(index : int) -> (key, value)
>     Returns the index-th item
> 
> ordereddict.value(index : int) -> value
>     Returns the index-th item's value
> 
> ordereddict.set_value(index : int, value)
>     Sets the index-th item's value to value; raises IndexError if
> index is out of
>     range. If not expensive, maybe return the key.
> 
> ordereddict.copy() # Same as dict.
> ordereddict.clear() # Same as dict.
> ordereddict.get(key, value=None) # Same as dict
> ordereddict.setdefault(key, value) # Same as dict
> ordereddict.pop(key, value) # Same as dict
> ordereddict.popitem() # Same as dict
> 
> ordereddict.keys(fromindex : int = None, uptoindex : int : None) ->
> list of keys
>     Returns an ordered list of keys, or a slice of keys if one or two
> indexes is given
> 
> ordereddict.values() # Same as dict
> ordereddict.items() # Same as dict
> ordereddict.iterkeys() # Same as dict
> ordereddict.itervalues() # Same as dict
> ordereddict.iteritems() # Same as dict
> ordereddict.has_key() # Same as dict
> 
> Also the same as dict (and as always, working in key order):
> 
> for key in d: pass
> if key in d: pass
> len(d)
> del d[key]
> d[key]
> d[key] = value

May I also make one more suggestion, to call it a "sort_ordered_dict" 
(or "sortordereddict", or even better a "sorteddict"--where the "ed" 
comes from "ordered")? Its hard for me to move past the established 
definition of "order", as we think of tuples being ordered--as in the 
first sentence of http://en.wikipedia.org/wiki/Tuple--to something that 
is preserving an order according to a comparison. The distinction is so 
firmly ingrained in my head that it took me a while to wake up to the 
fact that you were describing something completely different than an 
ordered dictionary (e.g. http://www.voidspace.org.uk/python/odict.html) 
even though you were being very unambiguous with your description.

And I also think the ability to drop it in for a built-in dict is very 
valuable.

James


From bdesth.quelquechose at free.quelquepart.fr  Mon Sep 17 18:44:15 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 18 Sep 2007 00:44:15 +0200
Subject: can Python be useful as functional?
In-Reply-To: <13f00gv3gl3n43d@corp.supernews.com>
References: <1190073045.618869.261290@k79g2000hse.googlegroups.com>
	<mailman.727.1190133380.2658.python-list@python.org>
	<13f00gv3gl3n43d@corp.supernews.com>
Message-ID: <46f0243b$0$32214$426a74cc@news.free.fr>

Grant Edwards a ?crit :
> On 2007-09-18, Steve Holden <steve at holdenweb.com> wrote:
> 
>>Lorenzo Stella wrote:
>>[...]
>>
>>>My question is: how can we call a language "functional" if
>>>it's major implementation has a limited stack? Or is my code
>>>wrong?
>>
>>So, which environment do you habitually use that provides an
>>*unlimited* stack?
> 
> Perhaps Lorenzo Stella is referring to Python's lack of
> tail-recursion optimization?  There are languages that
> guarantee unlimited tail-recursion with a limited stack.
> 
> That's a typical feature for a function language, right?
> 
And also for some implementations of some purely procedural languages IIRC.



From tec at knology.net  Mon Sep 10 14:38:50 2007
From: tec at knology.net (Tim)
Date: Mon, 10 Sep 2007 11:38:50 -0700
Subject: memcpy
Message-ID: <1189449530.171049.323230@22g2000hsm.googlegroups.com>

How do I memcpy from a pointer to an array of floats in python?

I get errors: NameError: global name 'row' is not defined

I want to be able to get the row[i] array element. In C I would
normally place the address of row as the first argument.

cdll.msvcrt.memcpy( row, pData, 256 )


If I define row as the following I also get the following error:

row = ones( TOTAL_PARAMETER_ENTRIES, dtype=float )

ArgumentError: argument 1: <type 'exceptions.TypeError'>: Don't know
how to convert parameter 1

Thanks



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Sep 21 03:39:44 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 21 Sep 2007 09:39:44 +0200
Subject: about __str__
In-Reply-To: <mailman.835.1190325729.2658.python-list@python.org>
References: <mailman.835.1190325729.2658.python-list@python.org>
Message-ID: <46f37540$0$16854$426a74cc@news.free.fr>

Konstantinos Pachopoulos a ?crit :
> Hi,
> i have the following class:
> ===========================================
> class CmterIDCmts:      
      def __init__(self,commiterID,commits):
>        self.commiterID_=long(commiterID)
>        self.commits_=long(commits)
>      
>    def __str__(self):
>        s=""
>        s+="<"+str(self.commiterID_)+":"+str(self.commits_)+">"
>        return s

def __str__(self):
   return "<%s:%s>" % (self.commiterID_, self.commits_)




From tdwdotnet at gmail.com  Thu Sep 20 19:10:32 2007
From: tdwdotnet at gmail.com (Tim Williams)
Date: Fri, 21 Sep 2007 00:10:32 +0100
Subject: I could use some help making this Python code run faster using
	only Python code.
In-Reply-To: <9afea2ac0709201604i3a4510e1o8edc8fa01bcd5432@mail.gmail.com>
References: <1190325588.608625.259800@q3g2000prf.googlegroups.com>
	<9afea2ac0709201604i3a4510e1o8edc8fa01bcd5432@mail.gmail.com>
Message-ID: <9afea2ac0709201610oc3d13d7n91d590fcdbb7e30b@mail.gmail.com>

On 21/09/2007, Tim Williams <tdwdotnet at gmail.com> wrote:
> On 20/09/2007, Python Maniac <raychorn at hotmail.com> wrote:
> > I am new to Python however I would like some feedback from those who
> > know more about Python than I do at this time.
> >
> > def scrambleLine(line):
> >    s = ''
> >    for c in line:
> >        s += chr(ord(c) | 0x80)
> >    return s
> >
> > def descrambleLine(line):
> >    s = ''
> >    for c in line:
> >        s += chr(ord(c) & 0x7f)
> >    return ''.join( [chr(ord(c) & 0x7f) for c in line] )
> >
> > def scrambleFile(fname,action=1):
> >    if (path.exists(fname)):
> >        try:
> >            f = open(fname, "r")
> >            toks = fname.split('.')
> >            while (len(toks) > 2):
> >                toks.pop()
> >            fname = '.'.join(toks)
> >            if (action == 1):
> >                _fname = fname + '.scrambled'
> >            elif (action == 0):
> >                _fname = fname + '.descrambled'
> >            if (path.exists(_fname)):
> >                os.remove(_fname)
> >            ff = open(_fname, "w+")
> >            if (action == 1):
> >                for l in f:
> >                    ff.write(scrambleLine(l))
> >            elif (action == 0):
> >                for l in f:
> >                    ff.write(descrambleLine(l))
> >        except Exception, details:
> >            print 'ERROR :: (%s)' % details
> >        finally:
> >            f.close()
> >            ff.close()
> >    else:
> >        print 'WARNING :: Missing file "%s" - cannot continue.' % fname
> >
> > --
>
>
> def scrambleLine(line):
>   return ''.join( [chr(ord(c) | 0x80) for c in line] )
>
> def descrambleLine(line):
>    return ''.join( [chr(ord(c) & 0x7f) for c in line] )
>
> def scrambleFile(fname,action=1):
>       try:
>           f = open(fname, "r")
>           fname = '.'.join(fname.split('.')[:2])
>           if action:
>               _fname = fname + '.scrambled'
>           else:
>               _fname = fname + '.descrambled'
>           ff = open(_fname, "w")
>           if action:
>               ff.write('\r\n.join([scrambleLine(l) for l in f ]))
>           else :
>               ff.write('\r\n.join([descrambleLine(l) for l in f ]))
>           f.close()
>           ff.close()
>       except Exception, details:
>           print 'ERROR :: (%s)' % details
>
> HTH :)
>

or maybe even this:

Apologies for the self-reply, its late here !
(a couple of typos fixed too! )

def scrambleFile(fname,action=1):
      try:
          f = open(fname, "r")
          fname = '.'.join(fname.split('.')[:2])
          if action:
              ff = open(fname + '.scrambled', "w")
              ff.write('\r\n'.join([scrambleLine(l) for l in f ]))
          else :
              ff = open(fname + '.descrambled', "w")
              ff.write('\r\n'.join([descrambleLine(l) for l in f ]))
          f.close()
          ff.close()

      except Exception, details:
          print 'ERROR :: (%s)' % details

:)


From bignose+hates-spam at benfinney.id.au  Mon Sep 24 21:20:59 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 25 Sep 2007 11:20:59 +1000
Subject: Nested For and While Statements
References: <1190662087.403000.16290@g4g2000hsf.googlegroups.com>
	<1190666647.199890.174670@o80g2000hse.googlegroups.com>
Message-ID: <874phjpmkk.fsf@benfinney.id.au>

Roberto Bonvallet <rbonvall at gmail.com> writes:

> On Sep 24, 3:28 pm, kou... at hotmail.com wrote:
> > [...] where I start getting some errors.
> > I'm hoping I won't have to post my code
> 
> "Doctor, I'm feeling bad.  I hope I won't have to tell you my
> symptoms.  What do I have?"
> 
> Please provide the actual errors and the actual code.  It is easier,
> less error prone and more useful to copy and paste them instead of
> writing some pseudocode.

Far better is to ask the querent to provide a minimal example that
demonstrates the problem.

"Minimal" in this case means "if I take away any part of this code,
the described behaviour no longer occurs". While that's not true, keep
whittling away at the example code until it *is* true, so we know that
all the code is necessary to repeat the problem.

Only then should you post the code ? if, of course, you haven't yet
seen the solution with your own eyes.

-- 
 \        "Laurie got offended that I used the word 'puke.' But to me, |
  `\              that's what her dinner tasted like."  -- Jack Handey |
_o__)                                                                  |
Ben Finney


From steve at holdenweb.com  Fri Sep 14 08:47:18 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 14 Sep 2007 08:47:18 -0400
Subject: recursion
In-Reply-To: <fcdrv9$7lr$1@ss408.t-com.hr>
References: <fcbfnj$lh4$1@ss408.t-com.hr>	<slrnfeinvk.1cc.horpner@FIAD06.norwich.edu>	<mailman.491.1189700115.2658.python-list@python.org>	<slrnfeit3k.1lg.horpner@FIAD06.norwich.edu>
	<fcdrv9$7lr$1@ss408.t-com.hr>
Message-ID: <fcdvso$4kc$1@sea.gmane.org>

Gigs_ wrote:
> sorry i think that i express wrong. having problem with english
> 
> 
> what i mean is how python knows to add all thing at the end of recursion
> 
>  >>> def f(l):
>      if l == []:
>          return []
>      else:
>          return f(l[1:]) + l[:1]
> 
> 
> f([1,2,3])
> 
> recursion1   f([2,3]) + [1]
> 
> recursion2   f([3]) + [2]  or [2, 1]?
> 
> recursion3   f([]) + [3] or   [3, 2, 1]
> 
> 
> i dont get all this
> 
>  >>> def f(l):
>      if l == []:
> 	print l
>          return []
>      else:
>          return f(l[1:]) + l[:1]
> 
>  >>> f([1,2,3])
> []
> [3, 2, 1]  # how this come here? how python save  variables from each recursion?
> 
> 
> sorry again for first post
> 
I think the thing you are missing is that the recursive call f(l[1:]) in 
the return statement causes the current call to be suspended until the 
recursive call is complete. The new call has its own value for l, which 
is the caller's l[1:]. Each new call creates a completely new namespace.

A less complicated function might make it a little more obvious.

  def factorial(n):
     print "n =", n
     if n=0:
         return 1
     else:
         return n * factorial(n-1)

Try running that with a few different arguments to show you how the 
recursion works.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From jcd at sdf.lonestar.org  Mon Sep 10 22:55:43 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Mon, 10 Sep 2007 22:55:43 -0400
Subject: Enum class with ToString functionality
In-Reply-To: <1189478288.237609.25140@50g2000hsm.googlegroups.com>
References: <1189416537.050002.61120@r34g2000hsd.googlegroups.com>	<87bqca9hrw.fsf@benfinney.id.au>	<1189472591.797327.189180@w3g2000hsg.googlegroups.com>	<87sl5m7xxm.fsf@benfinney.id.au>
	<1189478288.237609.25140@50g2000hsm.googlegroups.com>
Message-ID: <46E603AF.3050900@sdf.lonestar.org>


TheFlyingDutchman wrote:
> On Sep 10, 7:12 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
>  wrote:
>> TheFlyingDutchman <zzbba... at aol.com> writes:
>>>> <URL:http://cheeseshop.python.org/pypi/enum/>
>> (Please preserve attribution lines so it's clear who wrote what.)
>>
>>
>>> Looking at the documentation it looks excellent. But I don't
>>> understand the 0.4.2 version number,
>> Note the tag that says the "Development Status" is "Beta".
>>
>>> particularly when you refer to it as robust.
>> I assume you're referring to the short description, "Robust
>> enumerated type support in Python".
>>
>> That refers to the implemented type as robust, not the state of
>> the code. That is, the short description should be read as
>> "Support, in Python, for robust enumerated types". It's a
>> description of the package functionality.
>>
>> If, of course, the state of the code is not robust, that's a bug
>> that needs to be fixed; but that's true for any package.
>>
>> -- \     "Try to become not a man of success, but try rather to
>> become a | `\                                   man of value."
>> -Albert Einstein | _o__)
>> | Ben Finney
>
> What is the difference between this version and the 1.0 version?
>

Uh... The 1.0 version is vaporware? 

Cheers,
Cliff



From stef.mientki at gmail.com  Sun Sep  9 17:06:19 2007
From: stef.mientki at gmail.com (stef mientki)
Date: Sun, 09 Sep 2007 23:06:19 +0200
Subject: Modul (%) in python not like in C?
In-Reply-To: <46E4466C.2030303@sdf.lonestar.org>
References: <880dece00709091201n449d4c2k31998a5d426de17d@mail.gmail.com>
	<46E4466C.2030303@sdf.lonestar.org>
Message-ID: <46E4604B.4020301@gmail.com>

J. Cliff Dyer wrote:
> Dotan Cohen wrote:
>   
>> FIrst of all, how is the % symbol (as in 70%6=4) called in English?
>>
>> Second, in Turbo C -111%10=-1 however in python -111%10=9. Is one or
>> the other in error? Is this a known gotcha? I tried to google the
>> subject however one cannot google the symbol %. Thanks in advance.
>>
>> Dotan Cohen
>>   
>>     
>
> The % operator is called "modulo" in English.  I don't think the 
> difference in implementation is an error.  It's just a difference of 
> calculation method. 
>
> Python will always yield a number x = m%n such that 0 <= x < n, but 
> Turbo C will always yield a number such that if x = m%n -x = -m%n.  That 
> is, since 111 % 10 = 1, -111 % 10 = -1.  The two values will always 
> differ by n (as used above). 
>
> I'm sure there are mathematicians on the list who can give you a more 
> technical, precise explanation of the reasons for the different results.
>
>   
It's a long time ago, but if I remember well,
"modulo" was introduced as an operator in Galois fields theory,
and Galois fields only exists of the whole numbers 0 .. N-1.
So the Python implementation seems the only correct one.
Most languages handle it wrong
(I didn't know until now Python was so correct ;-)
so you always have to add N (sometimes even more than once)  manually 
(to get valid results)
 x = (N + (some kind of formula that can have a negative result) ) % N

cheers,
Stef





From lorenzo.digregorio at gmail.com  Mon Sep 17 19:10:20 2007
From: lorenzo.digregorio at gmail.com (Lorenzo Di Gregorio)
Date: Mon, 17 Sep 2007 23:10:20 -0000
Subject: "once" assigment in Python
In-Reply-To: <1uSdnaFGwMuICHPbnZ2dnUVZ_tijnZ2d@comcast.com>
References: <1189750616.597409.85380@w3g2000hsg.googlegroups.com>
	<1uSdnaFGwMuICHPbnZ2dnUVZ_tijnZ2d@comcast.com>
Message-ID: <1190070620.926481.56620@k79g2000hse.googlegroups.com>

On 17 Sep., 16:54, Larry Bates <larry.ba... at websafe.com> wrote:
>
> IMHO variables like what you describe are really data not program variables.
> You might consider putting variables like these in a dictionary and then check
> to see if the keys exist before assignment:
>
> var_dict={}
>
> #
> # See if 'varname' initialized, if not it needs to be
> #
> if 'varname' not in var_dict:
>       var_dict[varname]=somevalue

This is a good point!

I could write something like:

instantiate('component',function)

and have instantiate() to conditionally do:

instance['component']=Module(function)

Of course this means using:

instance['component'].method()

instead of just:

component.method()

A more annoying difficulty is with the fact that, while the scope of
ordinary variables is limited (function, package), the scope of
'component' would be global (the whole instance[]): having global
names could be pretty annoying in modeling a hierarchy.  Anyway, some
scoping mechanism could be implemented over the global dictionary and
this could be a good price to pay to avoid other tricks.
Further suggestions?

Thank you!
Lorenzo



From demoncleaner13 at hotmail.com  Sat Sep 29 13:53:57 2007
From: demoncleaner13 at hotmail.com (dcleaner)
Date: Sat, 29 Sep 2007 17:53:57 +0000 (UTC)
Subject: xml modifications
Message-ID: <fdm3fk$nk9$1@news1.carnet.hr>

hi there...i'm a begginer level user and i've stumbbled upon a problem a 
bit beyond my knowledge. i hope that somebody will be able to help me with 
my problem...

the problem is: i'm transforming an Access database to XML with some 
adjustements. basicaly i have one main table in which i have my main data 
and keys to other tables containing other relevant data.
after exporting my main table to xml i have in some tags only keys to other 
tables. and now i want to change those keys to meaningful data.
for instance: after exporting, i have a line like this: <tagZ>1</tagZ>, and 
i want to change it to be just an opening tag for something else; <tagQ 
attr1="xx" attr2="yy">.the data which must be written in attr1 and attr2 
depends upon the number (in this case number 1) inside 

the tag (tagZ).


From python at rcn.com  Wed Sep 26 13:59:52 2007
From: python at rcn.com (Raymond Hettinger)
Date: Wed, 26 Sep 2007 10:59:52 -0700
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
Message-ID: <1190829592.800804.242260@50g2000hsm.googlegroups.com>

[Mark Summerfield]
> Below is a PEP proposal for a sorteddict. It arises out of a
> discussion on this list that began a few weeks ago with the subject of
> "An ordered dictionary for the Python library?"

It is worth remembering that the long sought after datatype was a dict
that could loop over keys in *insertion* order, not based on some
function of the key itself.


> If there is positive feedback I will submit the PEP to the reviewers,
> so if you think it is a good idea please say so.

As one who was submitted many PEPs, I can advise that the quickest way
to irrevocably kill an idea is to submit a PEP to early (we almost
didn't get genexps because the PEP was submitted pre-maturely).
Instead, I advise posting an ASPN recipe so the details can be
hammered-out and a fan club can be grown.

For this particular idea, I am -1 on inclusion in the standard
library.  The PEP focuses mainly on implementation but is weakest in
the rationale section.  Its advantages over "for k in sorted(d)" are
miniscule.  To be considered for the collections module, there needs
to be compelling use case advantages either in terms of usability or
performance.

After grepping through my accumulated code base for "sorted", I see
remarkably few places where sortdict would have be preferred and in
those few cases, the advantage was so slight that the code would not
be worth changing.  The majority of dictionary sorts are characterized
by fully building a dictionary and then sorting it. In those cases,
sortdict merely offers a different spelling and adds a small
performance cost during key insertion.  The sortdict has some
potential in the comparatively rare case of a long lived dictionary
where periodic sorted key requests are interleaved with operations
that mutate the dictionary.  In those cases, the separate tracking of
added/removed keys may save some sorting effort; however, there is an
offsetting cost of many __hash__/__cmp__ calls in the list
comprehension update and the modest savings was in all cases
trivialized by cost of whatever was initiating the dictionary
mutations (user inputs or web updates).

Also, there were cases when the sortdict was at a distinct
disadvantage.  In those cases, there were multiple key functions
(key=record.name or key=record.date or key=record.size).  There
standard approach using sorted() creates three separate sorted lists
and only one dict.  In contrast, the sortdict approach would need
three sortdicts each with their own dict and sorted list.

IMHO, the collections module should be saved for something much more
powerful and generic like a dictionary that generates a callback
whenever it is mutated.  A datatype like that would have it much
easier for you to implement something like this sortdict or the long
sought after dict that remembers its key insertion order.


Raymond



From gagsl-py2 at yahoo.com.ar  Thu Sep  6 21:56:05 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 06 Sep 2007 22:56:05 -0300
Subject: Using wild character
References: <1189054805.447871.213150@y42g2000hsy.googlegroups.com>
	<1189058095.671230.262190@o80g2000hse.googlegroups.com>
	<5k9pjoF2mrncU1@mid.uni-berlin.de>
	<1189122511.231602.217710@w3g2000hsg.googlegroups.com>
	<mailman.197.1189126396.2658.python-list@python.org>
	<1189127996.212274.281760@w3g2000hsg.googlegroups.com>
Message-ID: <op.tx9gzrl1x6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 06 Sep 2007 22:19:56 -0300, TheFlyingDutchman <zzbbaadd at aol.com>  
escribi?:

> The Perl community has an expression "There is more than one way to do
> it". As in, Perl is good because you have multiple choices (whether
> it's a function/module/class/operator) of how to implement a
> particular piece of logic.  More choices is often good, but this can
> lead to a problem in that you might be presented with more things to
> learn and or you come across less common ways of doing something that
> you are not familiar with in code you are trying to understand.
>
> Does the Python community have a position regarding duplicate ways in
> the language to achieve something in your code?

Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit  
(Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
py> import this

-- 
Gabriel Genellina



From fredrik at pythonware.com  Thu Sep 27 14:17:00 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 27 Sep 2007 20:17:00 +0200
Subject: ValueError: too many values to unpack,>>>
In-Reply-To: <46FBED79.6070207@comcast.net>
References: <mailman.1169.1190911027.2658.python-list@python.org>	<5m24sfFatlbuU1@mid.uni-berlin.de>
	<46FBED79.6070207@comcast.net>
Message-ID: <fdgs2t$8ni$1@sea.gmane.org>

Shawn Minisall wrote:

> Sorry, it looks like it's on the fourth line with the 3 values on line 
> 4...its reading line 3 fine
> 
> Traceback (most recent call last):
>   File "<pyshell#0>", line 1, in <module>
>     main()
>   File "I:\COMPUTER PROGRAMMING CLASS\PROJECT #1\project1.py", line 33, 
> in main
>     deposit1, deposit2, deposit3 = string.split(line, "\t")
> ValueError: too many values to unpack

instead of fumbling around in the dark, try inserting a print statement 
before the offending line, so you can see what you're trying to unpack:

     print string.split(line, "\t") # see what it is
     deposit1, deposit2, deposit3 = string.split(line, "\t")

</F>



From earnloads007 at gmail.com  Fri Sep 14 16:37:34 2007
From: earnloads007 at gmail.com (earnloads007 at gmail.com)
Date: Fri, 14 Sep 2007 20:37:34 -0000
Subject: Make money to share your videos
Message-ID: <1189802254.119448.78620@r29g2000hsg.googlegroups.com>


Goodtolove.com is sharing their 50% adsense revenue with you to post
videos of anything.
Just keep up logging in and start posting now to make money...



From steve at REMOVE-THIS-cybersource.com.au  Sat Sep 15 20:07:08 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sun, 16 Sep 2007 00:07:08 -0000
Subject: Can You Program?
References: <1189679878.271415.88700@w3g2000hsg.googlegroups.com>
	<1189865720.546424.155860@d55g2000hsg.googlegroups.com>
Message-ID: <13eostc9kfukl9e@corp.supernews.com>

On Sat, 15 Sep 2007 14:15:20 +0000, brus stoc at gmail dot com wrote:

[snip spam]
 
> Hey, thanks for spamming our group.

You know, there are probably millions of people who never received the 
original spam because their Usenet provider does a good job of filtering 
out crud, and they wouldn't even know it existed, except that YOU decided 
you had to be a big man by engaging the spammer in conversation.

Did you really think even for a millisecond that the spammer actually 
hangs around long enough to read replies to his spam?

All I can say is, thank goodness for automated Baysian filters, because 
now your email address is associated with spam in thousands of filters 
across the world, reducing the chances of us seeing posts from you. I 
think that's a good thing.



-- 
Steven.


From hat at se-162.se.wtb.tue.nl  Mon Sep 10 09:48:44 2007
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Mon, 10 Sep 2007 15:48:44 +0200
Subject: Using a time duration to print out data where every 2 seconds is
	a pixel
References: <1189427545.322679.260970@r29g2000hsg.googlegroups.com>
Message-ID: <slrnfeaips.m47.hat@se-162.se.wtb.tue.nl>

On 2007-09-10, cjt22 at bath.ac.uk <cjt22 at bath.ac.uk> wrote:
> I want to be able print out the Steps as a visual representation so
> that I can show
> 1. The order the steps started
> 2. The duration of the steps
>
> i.e. a print out such as:
>
>
> [    a    ]
>            [ b ]
>       [             c           ]

This graph is commonly known as a Gantt Chart.
The most common use case of such charts is project planning.

The newest GNU plot program has support for these charts afaik.

> Another related question is that I can't seem to do arithmetic when
> the variables are in String format
> of  %H:%M:%S or converted to type struct_time

True (but you already detected that).

Either convert your struct_times to floats (time.mktime), or use a date/time
module specialized in computing with dates and times.

(I have seen references to a module called datetime, but I have never used such
a module so no idea what it is or where to get it).


Sincerely,
Albert


From ajmacd at ns.sympatico.ca  Wed Sep 19 12:19:38 2007
From: ajmacd at ns.sympatico.ca (Aaron J. M.)
Date: Wed, 19 Sep 2007 09:19:38 -0700
Subject: Deserializing specific objects from a file
In-Reply-To: <5lbu7aF78tegU1@mid.uni-berlin.de>
References: <1190156558.313252.31000@y27g2000pre.googlegroups.com>
	<5lbu7aF78tegU1@mid.uni-berlin.de>
Message-ID: <1190218778.852249.167280@y27g2000pre.googlegroups.com>

That's exactly what I needed.  Thank you.

Aaron J. M.



From m.n.summerfield at googlemail.com  Fri Sep 14 06:56:55 2007
From: m.n.summerfield at googlemail.com (Mark Summerfield)
Date: Fri, 14 Sep 2007 10:56:55 -0000
Subject: An ordered dictionary for the Python library?
In-Reply-To: <slrnfekm8t.spv.apardon@rcpc42.vub.ac.be>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<7xzlzrtrjn.fsf@ruckus.brouhaha.com>
	<1189664832.876539.86800@k79g2000hse.googlegroups.com>
	<7xps0mmig9.fsf@ruckus.brouhaha.com>
	<1189733708.659317.83950@y42g2000hsy.googlegroups.com>
	<1189753968.917636.310120@19g2000hsx.googlegroups.com>
	<slrnfekm8t.spv.apardon@rcpc42.vub.ac.be>
Message-ID: <1189767415.814718.312870@k79g2000hse.googlegroups.com>

On 14 Sep, 10:49, Antoon Pardon <apar... at forel.vub.ac.be> wrote:
> On 2007-09-14, Mark Summerfield <m.n.summerfi... at googlemail.com> wrote:
>
>
>
> > On 14 Sep, 02:35, J?rgen Urner <jUr... at arcor.de> wrote:
> >> Puh, what a discussion... most common use case I can think of is
>
> >> >> d = {'a': 1, 'b': 2, 'c': 3}
> >> >> for key in d:
> >> >>     # do something that relies on order of keys as specified in the constructor
>
> >> It's a bit tireing having to type
>
> >> >> for key in sorted(d.keys()):
> >> >>     do_somethig_with(d[key])
>
> >> instead of a trustfully
>
> >> >> for value in d.values():
> >> >>     do_somethig_with(value)
>
> >> As far as I can see much cleaner. No black magic needed ++ sort the
> >> dict
> >> to another order and rely on the sort order being stable would be a
> >> really
> >> a nice thing to have.
>
> >> My 2 cents,  J?rgen
>
> > What I envisage is:
>
> > d = ordereddict(a=1, x=20, b=35, m=4)
> > # some time later
> > d["e"] = 15
> > # later still
> > d["b"] = 70
> > d.keys() # returns ['a', 'b', 'e', 'm', 'x']
> > d.values() # returns [1, 70, 15, 4, 20]
>
> which seems to be exactly what my avltree module mentioned earlier
> provides.
>
> >>> from avltree import Tree
> >>> d=Tree(a=1, x=20, b=35, m=4)
> >>> d["e"] = 15
> >>> d["b"] = 70
> >>> d.keys()
>
> ['a', 'b', 'e', 'm', 'x']>>> d.values()
>
> [1, 70, 15, 4, 20]

Antoon,

Your AVL tree looks impressive (although it has five times the lines
of my ordereddict), but it does not appear to support dict.update()'s
API (which was extended in 2.4), so you can't do: avl.update({'g':
20}, a=9, b=22).

Also, it does not provide the key(), value(), and item() methods that
the API I proposed can support (because in an ordereddict, index
positions make sense).

If there was consensus on an API and you, me, and others had different
implementations, we could always come up with some tests to compare
their relative performance, and put the fastest one(s) forward in a
PEP. (I don't care if my own code is used or not, it is the
functionality in Python's standard library that I want, whoever's code
it is.)



From cjw at sympatico.ca  Fri Sep 28 17:03:23 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Fri, 28 Sep 2007 17:03:23 -0400
Subject: Python 3.0 migration plans?
In-Reply-To: <1191007754.740566.137510@n39g2000hsh.googlegroups.com>
References: <1191002679.569709.16870@22g2000hsm.googlegroups.com>	<mailman.1242.1191003389.2658.python-list@python.org>	<1191005906.556751.261940@22g2000hsm.googlegroups.com>	<5m51l4Fbao07U2@mid.uni-berlin.de>
	<1191007754.740566.137510@n39g2000hsh.googlegroups.com>
Message-ID: <46FD6C1B.3010503@sympatico.ca>

TheFlyingDutchman wrote:
>> Or bind resources of these pocket protectors that otherwise would lead to
>> answers for people that do seek enlightment...
> 
> I don't think it would be correct to characterize my posts as not
> seeking enlightenment. I do also happen to voice my opinion which
> seems appropriate since this can be characterized as a discussion
> group. It theoretically is possible for a discussion group to tolerate
> opinions that diverge from the majority.
+1
> 
> One issue I have with this group and that I encountered many years ago
> in the Perl group is that there is no separate group
> comp.lang.python.beginner where you can ask questions without getting
> hit with RTFM! and the like.
> 



From hg at nospam.org  Sat Sep  8 08:34:49 2007
From: hg at nospam.org (hg)
Date: Sat, 08 Sep 2007 05:34:49 -0700
Subject: ANN: Load binary application into a BasiCard from Python
Message-ID: <JFwEi.2537$3Y1.502@newssvr17.news.prodigy.net>

Hi,

Based on the already released SCF, the code is there:
http://snakecard.com/Source/Applications/SCF/Load_BC.zip.

hg



From JohnRoth1 at jhrothjr.com  Fri Sep 14 17:58:43 2007
From: JohnRoth1 at jhrothjr.com (John Roth)
Date: Fri, 14 Sep 2007 14:58:43 -0700
Subject: Python 3K or Python 2.9?
In-Reply-To: <1189618530.872819.136450@57g2000hsv.googlegroups.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
Message-ID: <1189807123.163995.104180@g4g2000hsf.googlegroups.com>

On Sep 12, 11:35 am, TheFlyingDutchman <zzbba... at aol.com> wrote:
> On Sep 12, 4:40 am, Bjoern Schliessmann <usenet-mail-0306.20.chr0n... at spamgourmet.com> wrote:
> > Ivan Voras wrote:
> > > What does "self" have to do with an object model? It's an
> > > function/method argument that might as well be hidden in the
> > > compiler without ever touching the role it has (if not, why?). I
> > > agree that it's needless noise in a language.
>
> > If this was needless, why do C++ and Java have the "this" pointer?
>
> "this" in C++ and Java is not shown in the parameter list, which was
> what he was
> complaining about.  He wants
>
> class MyClass:
>         def SomeFunction(someParameter):
>            self.someParameter = someParameter
>
> not
>
> class MyClass:
>         def SomeFunction(self, someParameter):
>            self.someParameter = someParameter
>
> The confusing way about the current Python method when you first
> encounter it is
>  why is "self" being passed in when you write the function but not
> when you call it. If the compiler is smart enough to know that
>
>     a = MyClass()
>     a.SomeFunction(12)
>
> SomeFunction() has a "self" implicitly added to the parameter list, it
> seems that it should be smart enough to know that a function defined
> in a class has a "self" implicitly added to the parameter list.

Pretty close. This is one of the things that's always puzzled me about
the discussion. Making self and cls keyword pseudo-constants that get
the current instance and class from the stack frame (or raise an
exception) would eliminate them from the method header.

It would ALSO eliminate a whole level of indirection in method
invocation and get rid of the instancemethod, classmethod and
staticmethod wrapper classes. This would be a significant
simplification. If it had been done earlier, it would have eliminated
most of the justification for method attributes (those silly @
things), thus showing that unneeded complexity breeds more unneeded
complexity.

John Roth



From sjmachin at lexicon.net  Fri Sep 14 18:04:01 2007
From: sjmachin at lexicon.net (John Machin)
Date: Fri, 14 Sep 2007 15:04:01 -0700
Subject: recursion
In-Reply-To: <mailman.548.1189790005.2658.python-list@python.org>
References: <fcbfnj$lh4$1@ss408.t-com.hr><5kvbn3F5h7l3U1@mid.uni-berlin.de>
	<mailman.548.1189790005.2658.python-list@python.org>
Message-ID: <1189807441.524993.15070@50g2000hsm.googlegroups.com>

On Sep 15, 3:06 am, "Terry Reedy" <tjre... at udel.edu> wrote:
>
> There have been languages, for instance, Fortran IV, where local variables
> were part of the function 'object' and which therefore prohibited recursion
> because of the very problem you alluded to in your question.  (My guess is
> the functions had an InUse flag that was checked when the function was
> called.)

No way. Waste of space for instructions to check the flag at the start
and reset it at the end. Waste of CPU time. Divide by zero? Subroutine
calls itself? Drive against the traffic flow on the freeway? Expected
outcome: crash or other unwanted result. Simple: don't do that! Why
bother checking? No self-respecting FORTRAN programmer would want to
use recursion anyway. And mixed case in a variable name? Sheesh.



From steven.bethard at gmail.com  Fri Sep 28 00:33:47 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 27 Sep 2007 22:33:47 -0600
Subject: Numeric command-line options vs. negative-number arguments
In-Reply-To: <87ejgj4lpy.fsf_-_@benfinney.id.au>
References: <1190913250.198794.269530@k79g2000hse.googlegroups.com>
	<fdgpic$ssu$00$1@news.t-online.com>
	<0a6dnQmBPIzuqmHbnZ2dnUVZ_vihnZ2d@comcast.com>
	<87ejgj4lpy.fsf_-_@benfinney.id.au>
Message-ID: <X5adnVivJZ2wGWHbnZ2dnUVZ_tyknZ2d@comcast.com>

Ben Finney wrote:
> Steven Bethard <steven.bethard at gmail.com> writes:
> 
>> In most cases, argparse (http://argparse.python-hosting.com/)
>> supports negative numbers right out of the box, with no need to use
>> '--':
>>
>>     >>> import argparse
>>     >>> parser = argparse.ArgumentParser()
>>     >>> parser.add_argument('-a', type=int)
>>     >>> parser.add_argument('b', type=int)
>>     >>> args = parser.parse_args('-a -42 -123'.split())
>>     >>> args.a
>>     -42
>>     >>> args.b
>>     -123
> 
> That would be irritating. I've used many programs which have numbers
> for their options because it makes the most sense, e.g. 'mpage' to
> indicate number of virtual pages on one page, or any number of
> networking commands that use '-4' and '-6' to specify IPv4 or IPv6.

Did you try it and find it didn't work as you expected? Numeric options 
seem to work okay for me::

     >>> import argparse
     >>> parser = argparse.ArgumentParser()
     >>> parser.add_argument('-1', dest='one', action='store_true')
     >>> args = parser.parse_args(['-1'])
     >>> args.one
     True

Argparse knows what your option flags look like, so if you specify one, 
it knows it's an option.  Argparse will only interpret it as a negative 
number if you specify a negative number that doesn't match a known option.

STeVe


From gagsl-py2 at yahoo.com.ar  Fri Sep 21 18:15:47 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 21 Sep 2007 19:15:47 -0300
Subject: elementtree question
References: <fd0lmi$pm8$1@foggy.unx.sas.com>
Message-ID: <op.ty0yslf9x6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 21 Sep 2007 11:49:53 -0300, Tim Arnold <tim.arnold at sas.com>  
escribi?:

> Hi, I'm using elementtree and elementtidy to work with some HTML files.  
> For
> some of these files I need to enclose the body content in a new div tag,
> like this:
> <body>
>   <div class="remapped">
>    original contents...
>   </div>
> </body>
>
> I figure there must be a way to do it by creating a 'div' SubElement to  
> the
> 'body' tag and somehow copying the rest of the tree under that  
> SubElement,
> but it's beyond my comprehension.

import xml.etree.ElementTree as ET
source = """<html><head><title>Test</title></head><body>
  original contents... 2&amp;3 <a href="hello/world">som&#101; text</a>
  <p>Another paragraph</p>
</body></html>"""
tree = ET.XML(source)
body = tree.find("body")
newdiv = ET.Element('div', {'class':'remapped'})
newdiv.append(body)
bodyidx = tree.getchildren().index(body)
tree[bodyidx]=newdiv
ET.dump(tree)

-- 
Gabriel Genellina



From bh at izb.knu.ac.kr  Sun Sep 30 09:52:43 2007
From: bh at izb.knu.ac.kr (Byung-Hee HWANG)
Date: Sun, 30 Sep 2007 22:52:43 +0900
Subject: Can you please give me some advice?
In-Reply-To: <13fuv0gh7342r27@corp.supernews.com>
References: <mailman.1300.1191147737.2658.python-list@python.org>
	<13fuv0gh7342r27@corp.supernews.com>
Message-ID: <1191160363.2127.21.camel@viola.izb.knu.ac.kr>

On Sun, 2007-09-30 at 10:36 +0000, Steven D'Aprano wrote:
[...snip...]
> Sorry about the English.
That's alright. I am always struggling against English. It is not
strange now. Thank you for your kindness.

Byung-Hee



From tjreedy at udel.edu  Tue Sep 18 19:27:58 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 18 Sep 2007 19:27:58 -0400
Subject: The meaning of  a = b  in object oriented languages
References: <1190094057.976729.285120__39064.8685548969$1190094417$gmane$org@n39g2000hsh.googlegroups.com>
Message-ID: <fcpmto$2eq$1@sea.gmane.org>


"Summercool" <Summercoolness at gmail.com> wrote in message 
news:1190094057.976729.285120__39064.8685548969$1190094417$gmane$org at n39g2000hsh.googlegroups.com...

In Python, names are names.  They get associated with or bound to objects.

b=<expression>

means associate name b with the object resulting from evaulating the 
expression.  So

b = a

means associate b with the object 'currently' bound to a.

Your discussion of pointers, bytes, and integer-addressed memory locations 
is correct as to the CPython implementation of Python.  But these are not 
part of the semantics of Python itself as an algorithm language.  Unlike 
with C, we humans can read, understand, and execute Python code without 
mentally simulating a linear-memory computer.  That is part of what makes 
it easier to read.

Terry Jan Reedy





From f.braennstroem at gmx.de  Sat Sep 15 12:57:27 2007
From: f.braennstroem at gmx.de (Fabian Braennstroem)
Date: Sat, 15 Sep 2007 16:57:27 +0000
Subject: extract text from log file using re
In-Reply-To: <fcc1so$pcv$1@sea.gmane.org>
References: <fcc1so$pcv$1@sea.gmane.org>
Message-ID: <fcgrsd$mq3$1@sea.gmane.org>

Hi to all,

thanks for your help. The approach
	print '\r\n'.join([x.strip() for x in
open('c:/flutest.txt') if 'e-0' in x])
works quite well :-)

Greetings!
Fabian

Fabian Braennstroem schrieb am 09/13/2007 09:09 PM:
> Hi,
> 
> I would like to delete a region on a log file which has this
> kind of structure:
> 
> 
> #------flutest------------------------------------------------------------
>    498 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04
> 8.3956e-04 3.8560e-03 4.8384e-02 11:40:01  499
>    499 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04
> 8.3956e-04 3.8560e-03 4.8384e-02 11:40:01  499
> reversed flow in 1 faces on pressure-outlet 35.
> 
> Writing
> "/home/gcae504/SCR1/Solververgleich/Klimakruemmer_AK/CAD/Daimler/fluent-0500.cas"...
>  5429199 mixed cells, zone 29, binary.
> 11187656 mixed interior faces, zone 30, binary.
>    20004 triangular wall faces, zone 31, binary.
>     1104 mixed velocity-inlet faces, zone 32, binary.
>   133638 triangular wall faces, zone 33, binary.
>    14529 triangular wall faces, zone 34, binary.
>     1350 mixed pressure-outlet faces, zone 35, binary.
>    11714 mixed wall faces, zone 36, binary.
>  1232141 nodes, binary.
>  1232141 node flags, binary.
> Done.
> 
> 
> Writing
> "/home/gcae504/SCR1/Solververgleich/Klimakruemmer_AK/CAD/Daimler/fluent-0500.dat"...
> Done.
> 
>    500 1.0049e-03 2.4630e-04 9.8395e-05 1.4865e-04
> 8.3913e-04 3.8545e-03 1.3315e-01 11:14:10  500
> 
>  reversed flow in 2 faces on pressure-outlet 35.
>    501 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04
> 8.3956e-04 3.8560e-03 4.8384e-02 11:40:01  499
> 
> #------------------------------------------------------------------
> 
> I have a small script, which removes lines starting with
> '(re)versed', '(i)teration' and '(t)urbulent'  and put the
> rest into an array:
> 
> # -- plot residuals ----------------------------------------
>       import re
> filename="flutest"
> reversed_flow=re.compile('^\ re')
> turbulent_viscosity_ratio=re.compile('^\ tu')
> iteration=re.compile('^\ \ i')
> 
> begin_of_res=re.compile('>\ \ \ i')
> end_of_res=re.compile('^\ ad')
> 
> begin_of_writing=re.compile('^\Writing')
> end_of_writing=re.compile('^\Done')
> 
> end_number=0
> begin_number=0
> 
> 
> n = 0
> for line in open(filename).readlines():
>     n = n + 1
>     if begin_of_res.match(line):
>         begin_number=n+1
>         print "Line Number (begin): " + str(n)
> 
>     if end_of_res.match(line):
>         end_number=n
>         print "Line Number (end): " + str(n)
> 
>     if begin_of_writing.match(line):
>         begin_w=n+1
>         print "BeginWriting: " + str(n)
>         print "HALLO"
> 
>     if end_of_writing.match(line):
>         end_w=n+1
>         print "EndWriting: " +str(n)
> 
> if n > end_number:
>     end_number=n
>     print "Line Number (end): " + str(end_number)
> 
> 
> 
> 
> 
> n = 0
> array = []
> array_dummy = []
> array_mapped = []
> 
> mapped = []
> mappe = []
> 
> n = 0
> for line in open(filename).readlines():
>     n = n + 1
>     if (begin_number <= n) and (end_number > n):
> #        if (begin_w <= n) and (end_w > n):
>             if not reversed_flow.match(line) and not
> iteration.match(line) and not
> turbulent_viscosity_ratio.match(line):
>                 m=(line.strip().split())
>                 print m
>                 if len(m) > 0:
> #                    print len(m)
>                     laenge_liste=len(m)
> #                    print len(m)
>                     mappe.append(m)
> 
> 
> #--end plot
> residuals-------------------------------------------------
> 
> This works fine ; except for the region with the writing
> information:
> 
> #-----writing information
> -----------------------------------------
> Writing "/home/fb/fluent-0500.cas"...
>  5429199 mixed cells, zone 29, binary.
> 11187656 mixed interior faces, zone 30, binary.
>    20004 triangular wall faces, zone 31, binary.
>     1104 mixed velocity-inlet faces, zone 32, binary.
>   133638 triangular wall faces, zone 33, binary.
>    14529 triangular wall faces, zone 34, binary.
>     1350 mixed pressure-outlet faces, zone 35, binary.
>    11714 mixed wall faces, zone 36, binary.
>  1232141 nodes, binary.
>  1232141 node flags, binary.
> Done.
> # -------end writing information -------------------------------
> 
> Does anyone know, how I can this 'writing' stuff too? The
> matchingIt occurs a lot :-(
> 
> Regards!
> Fabian
> 



From rcdailey at gmail.com  Tue Sep 25 10:50:44 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Tue, 25 Sep 2007 09:50:44 -0500
Subject: Regular Expressions: Can't quite figure this problem out
In-Reply-To: <op.ty6ztgx0x6zn5v@gabriel2.softlabbsas.com.ar>
References: <496954360709241737o6e42e7efk29886b5631f6ca2e@mail.gmail.com>
	<a49e45f50709241827i107d0acav28431853ef403702@mail.gmail.com>
	<496954360709241853w6bb6e813ved0ec4fc80304d51@mail.gmail.com>
	<op.ty6tjyfqx6zn5v@gabriel2.softlabbsas.com.ar>
	<496954360709241917m3801e4aavee29cfef7deaf41b@mail.gmail.com>
	<fd9rs6$8b2$1@sea.gmane.org>
	<496954360709241951h6901d60etf2c4b3b5ec759f2a@mail.gmail.com>
	<op.ty6ztgx0x6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <496954360709250750p5d409806ga5914e8c7ad38cf1@mail.gmail.com>

Awesome description. This was more than helpful. I'm really grateful that
you took the time to outline that for me. I really understand it now.
However, as I mentioned in the lxml mailing list, I'm starting to learn more
towards regular expressions being a very LAST resort to solving problems
like this. In my specific case, I have a better choice which is the etree
parser. It does all of this for me (as you so kindly stated before). I hope
this is the correct attitude to have. Being a C++ developer, I normally
don't admire unmanageable and unreadable code (this is especially true with
regular expressions). They're very useful, but again I believe it should be
a last resort.

Thanks again for your help.

On 9/24/07, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>
> En Mon, 24 Sep 2007 23:51:57 -0300, Robert Dailey <rcdailey at gmail.com>
> escribi?:
>
> > What I meant was that it's not an option because I'm trying to learn
> > regular
> > expressions. RE is just as built in as anything else.
>
> Ok, let's analyze what you want. You have for instance this text:
> "<action></action>"
> which should become
> "<action/>"
>
> You have to match:
> (opening angle bracket)(any word)(closing angle bracket)(opening angle
> bracket)(slash)(same word as before)(closing angle bracket)
>
> This translates rather directly into this regular expression:
>
> r"<(\w+)></\1>"
>
> where \w+ means "one or more alphanumeric characters or _", and being
> surrounded in () creates a group (group number one), which is
> back-referenced as \1 to express "same word as before"
> The matched text should be replaced by (opening <)(the word
> found)(slash)(closing >), that is: r"<\1/>"
> Using the sub function in module re:
>
> py> import re
> py> source = """
> ... <root></root>
> ... <root/>
> ... <root><frame type="image"><action></action></frame></root>
> ... <root><frame type="image"><action/></frame></root>
> ... """
> py> print re.sub(r"<(\w+)></\1>", r"<\1/>", source)
>
> <root/>
> <root/>
> <root><frame type="image"><action/></frame></root>
> <root><frame type="image"><action/></frame></root>
>
> Now, a more complex example, involving tags with attributes:
> <frame type="image"></frame>  -->  <frame type="image" />
>
> You have to match:
> (opening angle bracket)(any word)(any sequence of words,spaces,other
> symbols,but NOT a closing angle bracket)(closing angle bracket)(opening
> angle bracket)(slash)(same word as before)(closing angle bracket)
>
> r"<(\w+)([^>]*)></\1>"
>
> [^>] means "anything but a >", the * means "may occur many times, maybe
> zero", and it's enclosed in () to create group 2.
>
> py> source = """
> ... <root></root>
> ... <root><frame type="image"></frame></root>
> ... """
> py> print re.sub(r"<(\w+)([^>]*)></\1>", r"<\1\2 />", source)
>
> <root />
> <root><frame type="image" /></root>
>
> Next step would be to allow whitespace wherever it is legal to appear -
> left as an exercise to the reader. Hint: use \s*
>
> --
> Gabriel Genellina
>
> --
> http://mail.python.org/mailman/listinfo/python-list
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From bignose+hates-spam at benfinney.id.au  Mon Sep  3 05:41:05 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 03 Sep 2007 19:41:05 +1000
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<1188803759.498517.198900@g4g2000hsf.googlegroups.com>
Message-ID: <87tzqc9jda.fsf@benfinney.id.au>

Michele Simionato <michele.simionato at gmail.com> writes:

> On Sep 3, 2:21 am, llothar <llot... at web.de> wrote:
> > I'm afraid that the GIL is killing the usefullness of python for
> > some types of applications now where 4,8 oder 64 threads on a chip
> > are here or comming soon.
> 
> This is FAQ. You will find thousands of discussion on the net about
> that.

> My personal opinion (and I am not the only one in the Python
> community) is that if you want to scale the way to go is to use
> processes, not threads, so removing the GIL would be a waste of
> effort anyway.

Yes. Processes are cheap on well-designed operating systems, and using
processes to subdivide your processor usage encourages simple, modular
interfaces between parts of a program. Threads, while also cheap, are
much more difficult and fiddly to program correctly, hence are rarely
an overall win.

One common response to that is "Processes are expensive on Win32". My
response to that is that if you're programming on Win32 and expecting
the application to scale well, you already have problems that must
first be addressed that are far more fundamental than the GIL.

-- 
 \        "Pinky, are you pondering what I'm pondering?" "Umm, I think |
  `\   so, Brain, but three men in a tub? Ooh, that's unsanitary!"  -- |
_o__)                                            _Pinky and The Brain_ |
Ben Finney


From bignose+hates-spam at benfinney.id.au  Wed Sep 19 01:48:08 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 19 Sep 2007 15:48:08 +1000
Subject: super() doesn't get superclass
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au>
	<13f196qktorgc88@corp.supernews.com>
Message-ID: <873axbxl2f.fsf@benfinney.id.au>

Dennis Lee Bieber <wlfraed at ix.netcom.com> writes:

> 	Try to interpret it as:

My point exactly. If a function is named 'super' and operates on
classes, it's a pretty strong implication that it's about
superclasses. Any explanation that begins "Try to interpret it as" and
then goes on to explain that it's to do with MRO, *not* superclasses,
is evidence that the function is *badly named*.

I'm not interested in documenting this function, because as I said I
don't see why I would want to use it. My objection is that, as
currently named, it's an *obstacle* when a programmer goes looking for
a way to get a superclass.

Possibly the name 'next_in_mro', while ugly, would at least match the
actual behaviour of this function.

At least then the next person who goes looking for "how do I get the
superclass of A?" won't be misled into trying to use *the wrong
function for that purpose*.

-- 
 \     "If you can't annoy somebody there is little point in writing." |
  `\                                                  -- Kingsley Amis |
_o__)                                                                  |
Ben Finney


From fakeaddress at nowhere.org  Sat Sep 22 12:50:20 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Sat, 22 Sep 2007 09:50:20 -0700
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <1190411282.060772.289270@y42g2000hsy.googlegroups.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
Message-ID: <XIbJi.36$ua4.28@newssvr22.news.prodigy.net>

chris.monsanto at gmail.com wrote:
> There are already anonymous functions in Python.
> 
> lambda x, y, z: x + y + z
> 
> is the same as:
> 
> def _(x, y, z): return x + y + z

They are the same only in special cases:

     The special identifier "_" is used in the interactive
     interpreter to store the result of the last evaluation; it
     is stored in the __builtin__ module. When not in interactive
     mode, "_" has no special meaning and is not defined.
     [Python Reference Manual; 2.3.2 Reserved classes of
     identifiers. http://docs.python.org/ref/id-classes.html]


-- 
--Bryan


From Summercoolness at gmail.com  Tue Sep 18 02:57:36 2007
From: Summercoolness at gmail.com (Summercool)
Date: Tue, 18 Sep 2007 06:57:36 -0000
Subject: The meaning of a = b in object oriented languages
In-Reply-To: <f517e32aa6ad5d39debdff7b6dc84685@ruby-forum.com>
References: <1190094057.976729.285120@n39g2000hsh.googlegroups.com>
	<f517e32aa6ad5d39debdff7b6dc84685@ruby-forum.com>
Message-ID: <1190098656.030658.66380@57g2000hsv.googlegroups.com>

On Sep 17, 11:04 pm, Lloyd Linklater <ll... at 2live4.com> wrote:
> SpringFlowers AutumnMoon wrote:
> > Is that the case: if a is an object, then b = a is only copying the
> > reference?
>
> That and it adds a counter.
>
> a = ["foo", "bar"]
> b = a
> b[0] = "bite me"
> p a, b
>
> a = "different"
> p a, b
>
> ***
>
> In the first print, we get
> ["something else", "bar"]
> ["something else", "bar"]
>
> showing that changing b changes a, as expected.  However, if we change
> a, b is NOT changed as seen in the second print.
>
> "different"
> ["something else", "bar"]
>
> That means that there is a counter inside that says to separate the two
> or b would have changed with a as a changed with b initially.

i think the line

a = "different"

means a is now set to a pointer to the String object with content
"different".
or that "a is now a reference to the String object."

and b is still a reference to the Array object.  so that's why a and b
print out different things.  they point to different objects.

i think:

whenever in Ruby, Python, and Java,

a is never an object.  a is always a "reference to an object"...  this
will solve a lot of puzzles when we don't understand some code
behaviors.

when a writing or a book reads "a is a Hash object; a is an Array
object; or a is an Animal object" it is just a short form to say that
"a is a reference to that object."

b = a means "whatever a is referencing to, now b is referencing it
too".

so that's why  a[1] = "foobar"  will change what b will display, but
a = "foobar" will not change what b will display.  (because a[1] =
"foobar" says "what is  a  referencing?  go there and change its
content that has the index 1"  and when b goes there to see it, it is
also changed.)




From saptarshi.guha at gmail.com  Thu Sep 20 20:22:03 2007
From: saptarshi.guha at gmail.com (sapsi)
Date: Thu, 20 Sep 2007 17:22:03 -0700
Subject: Python,SWIG and libjvm
In-Reply-To: <1190329236.398635.226020@y42g2000hsy.googlegroups.com>
References: <1190329236.398635.226020@y42g2000hsy.googlegroups.com>
Message-ID: <1190334123.039404.318860@d55g2000hsg.googlegroups.com>

On Sep 20, 7:00 pm, sapsi <saptarshi.g... at gmail.com> wrote:
> Hello,
> I'm not sure if this the correct list but here goes (and sorry for the
> noise). I've been attempting to wrap python around libhdfs.
> So far so good (


I should point out that libhdfs is a c library to Hadoop Distributed
FileSystem.
Thank you
Saptarshi




From kyosohma at gmail.com  Wed Sep 12 09:54:44 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 12 Sep 2007 13:54:44 -0000
Subject: Is the wxPython list down?
In-Reply-To: <591b7$46e7e900$83aef404$14417@news2.tudelft.nl>
References: <1189602607.803546.180320@w3g2000hsg.googlegroups.com>
	<591b7$46e7e900$83aef404$14417@news2.tudelft.nl>
Message-ID: <1189605284.161378.291240@r29g2000hsg.googlegroups.com>

On Sep 12, 8:26 am, stef <s.mien... at id.umcn.nl> wrote:
> kyoso... at gmail.com wrote:
> > Hi,
>
> > Does anyone know if the wxPython mailing list is having issues? I
>
> Yes the server has hardware problems,
> Robin Dunn (moderator), is informed about it.
>
> cheers,
> Stef Mientki

And to think, we're always told that that doesn't happen with RAID5.
Guess I should have checked the website. Thanks Stef and Frank.

Mike



From namesagame-usenet at yahoo.com  Fri Sep 28 13:48:58 2007
From: namesagame-usenet at yahoo.com (gamename)
Date: Fri, 28 Sep 2007 10:48:58 -0700
Subject: C Source Code Generator For Test Cases
Message-ID: <1191001738.456766.176050@n39g2000hsh.googlegroups.com>

Hi,

Can anyone recommend a good method of using python to generate c
source code?   I have tables of test cases to use as input to a
process which would generate the test's source code.  The Cheetah tool
looks interesting.  Has anyone used it? Any other suggestions?

TIA,
-T



From horpner at yahoo.com  Mon Sep  3 00:58:57 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Mon, 03 Sep 2007 04:58:57 GMT
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
	<1188735642.391419.103650@19g2000hsx.googlegroups.com>
	<1188740716.423349.304370@y42g2000hsy.googlegroups.com>
	<1188743299.664137.194760@d55g2000hsg.googlegroups.com>
	<46daeaec$0$19889$426a74cc@news.free.fr>
	<46DB04DD.80801@v.loewis.de>
Message-ID: <lwMCi.38253$G23.2220@newsreading01.news.tds.net>

On 2007-09-02, Martin v. L?wis <martin at v.loewis.de> wrote:
>>> (2) it is a interpretation language
>> Not quite. It's compiled to byte-code - just like Java (would
>> you call Java an 'interpreted language' ?)
>
> Python is not implemented like Java. In Java (at least in
> HotSpot), the byte code is further compiled to machine code
> before execution; in Python, the byte code is interpreted.
>
> Whether this makes Python an interpreter or a compiler, I don't
> know.

I'd call it an integrated compiler and virtual machine--a classic
combination.

-- 
Neil Cerutti


From evan at yelp.com  Wed Sep 12 03:36:55 2007
From: evan at yelp.com (Evan Klitzke)
Date: Wed, 12 Sep 2007 00:36:55 -0700
Subject: Generating HTML
In-Reply-To: <9e2f512b0709112133l41ce5ef1g815962a81becf6b9@mail.gmail.com>
References: <9e2f512b0709112133l41ce5ef1g815962a81becf6b9@mail.gmail.com>
Message-ID: <1189582615.7859.10.camel@thinkpad>

On Wed, 2007-09-12 at 01:33 -0300, Sebastian Bassi wrote:
> Hello,
> 
> What are people using these days to generate HTML? I still use
> HTMLgen, but I want to know if there are new options. I don't
> want/need a web-framework a la Zope, just want to produce valid HTML
> from Python.

It's not applicable for everything, but if you're planning on using
Python to generate web pages you should really be using Cheetah
templates. Very simple to use template system that is also very
powerful, and you don't need to use it in conjunction with a heavy web
application framework. See http://www.cheetahtemplate.org/

-- 
Evan Klitzke <evan at yelp.com>



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Sep 18 10:12:07 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 18 Sep 2007 16:12:07 +0200
Subject: super() doesn't get superclass
In-Reply-To: <87zlzkzgu2.fsf@benfinney.id.au>
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
Message-ID: <46efdcaf$0$14241$426a74cc@news.free.fr>

Ben Finney a ?crit :
> Evan Klitzke <evan at yelp.com> writes:
> 
>> On Tue, 2007-09-18 at 14:15 +1000, Ben Finney wrote:
>>> Why does the documentation of 'super' say that it returns the
>>> superclass when *that's not true*? It doesn't return the
>>> superclass, it returns the next class in the MRO, whether that's a
>>> superclass or not.
>> The next class in the MRO _is_ a superclass. Maybe not the way
>> you've defined it in your own code, but certainly of the new class
>> you created with MI.
> 
> If I define a class hierarchy as follows::
> 
>     class A(object): pass
>     class B(object): pass
>     class C(A): pass
>     class D(B): pass
> 
> is it true to say that "D is a superclass of A"? 

Obviously not.

> How about this:
> 
>     class E(C, D): pass
> 
> In this instance, the MRO now has D following A; but the superclass of
> 'A' is still 'object'.

Yes. And ?

> 
> You seem to be saying that now suddenly D *is* a superclass of
> A. 

I don't see such an assertion in Evan's answer. Chapter and verse ???

> That's certainly not what users will think of when they think
> "superclass" though.

If a class X is in the MRO of call Y, then X is a superclass of Y. I 
agree that the documentation for super is somewhat misleading (and 
obviously wrong), but it still *give access to* (at least one of) the 
superclass(es).

>>> Actually, even that's not true. The error message "AttributeError:
>>> 'super' object has no attribute 'bazfunc'" makes it clear that
>>> 'super' actually returns not the superclass, but a 'super' object,
>>> whatever that's supposed to be.

The 'super' object is a wrapper around a class and an object. It 
delegates attribute lookups to appropriate superclass.

>>> After reading the rest of the article, I'm amazed that 'super' as
>>> currently implemented is in Python at all.

If you have a better solution for handling multiple inheritence, please 
share with us.

FWIW, after all the articles I've read explaining why Python is badly 
designed, badly implemented, and totally flawed, I do wonder why this 
language exists at all !-)

> I don't want to break the inheritance chain. I want the superclass,

A soon as you have either multiple inheritence and/or an inheritence 
tree with depth > 1, there's no such thing as "the" superclass. wrt/ 
your exemple, object, A, B, C and D are *all* superclasses of E.

> not the "next class in the MRO".

The next class in the MRO is (usually and AFAICT) the most direct 
superclass.

> Orthogonally to that, I think it's madness to write a function for
> "return the next class in the MRO for 'type'" and document it as
> "return the superclass of 'type'".

I wouldn't use such an extreme word as 'madness', but I totally agree 
that this should be corrected. Care to submit a doc patch ?



From mstepnicki at gmail.com  Mon Sep 24 02:43:08 2007
From: mstepnicki at gmail.com (=?iso-8859-2?q?Marcin_St=EApnicki?=)
Date: Mon, 24 Sep 2007 06:43:08 +0000 (UTC)
Subject: scope, modyfing outside object from inside the method
Message-ID: <fd7m9s$9fe$1@news2.task.gda.pl>

Hello.

I thought I understand this, but apparently I don't :(. I'm missing
something very basic and fundamental here, so redirecting me to the
related documentation is welcomed as well as providing working code :).

Trivial example which works as expected:

>>> x = {'a':123, 'b': 456}
>>> y = x 
>>> x['a']=890
>>> y
{'a': 890, 'b': 456}

Now, let's try something more sophisticated (it's not real world example,
I've made up the problem which I think illustrates my issue). Let's say
I've got such a structure:

results = [ {'a': 12, 'b': 30 },
            {'a': 13, 'b': 40 } ]

I'd like to have each row and column in separate object of self-made
classes.:

class mycolumn():
  def __init__(self, resultset, row, col):
	self.value = resultset[row][col]
  def __str__(self):
	return 'Column value: %s' % self.value

class myrow():
  def __init__(self):
	self.container = {}
  def __str__ (self):
	return self.container

results = [
	{'a': 12, 'b' :30 },
        {'a': 13, 'b' :40 } 
]

mystruct = []

for row in results:
	mystruct.append ( myrow() )
	for col in row:
 	       	mystruct [len(mystruct)-1].container[col] = \
			 mycolumn(results, results.index(row), col)

print mystruct[0].container['b'] # 12
results[0]['b'] = 50             # 
print mystruct[0].container['b'] # also 12 :/

In other words, I'd like to "map" the results to myrow and mycolumn
objects, and have these new objects' values changed when I change "results".

I hope I explained it well enough :). Thank you for your time.

-- 
| And Do What You Will be the challenge | http://apcoln.linuxpl.org
|    So be it in love that harms none   | http://biznes.linux.pl
|   For this is the only commandment.   | http://www.juanperon.info
`---*  JID: Aragorn_Vime at jabber.org *---' http://www.naszedzieci.org


From carsten at uniqsys.com  Wed Sep 19 09:28:58 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Wed, 19 Sep 2007 09:28:58 -0400
Subject: Puzzled in the coding of Chinese
In-Reply-To: <200709191357069843001@126.com>
References: <1190073045.618869.261290@k79g2000hse.googlegroups.com>
	, <fcoth7$ae0$1@sea.gmane.org>
	, <mailman.729.1190135451.2658.python-list@python.org>
	, <871wcvlwly.fsf@rudin.co.uk>  <200709191357069843001@126.com>
Message-ID: <1190208538.3371.23.camel@dot.uniqsys.com>

On Wed, 2007-09-19 at 13:57 +0800, Xing wrote:
> Dear list members,
> 	I am a newcomer in the world of Python. But I am attracted by
> Python's power in handling text! Now I apply it to handle Chinese but
> the Chinese character cann't be displayed on the screen. What
> displayed on the screen is the 16bits codes. I am so puzzled! I
> believe this is an easy question to most of python users and an
> important question to me. Thanks a lot to your help!

You are not giving us any background information for troubleshooting
this. Your problem could be caused by a million different things, and
there is not point in us guessing. Please start by answering the
following questions:

1) What operating system are you using?
2) Can any programs on your computer display Chinese characters?
3) Where are you trying to display Chinese characters? Python command
line, in IDLE, in some GUI window?
4) Where are the Chinese characters you're trying to display coming
from? Are they hard-coded in your script, are they read from the
keyboard, from a file, from a database, from a web page?

-- 
Carsten Haese
http://informixdb.sourceforge.net




From randy.tucker7 at gmail.com  Thu Sep 27 09:45:57 2007
From: randy.tucker7 at gmail.com (randy.tucker7 at gmail.com)
Date: Thu, 27 Sep 2007 13:45:57 -0000
Subject: Translating Event.time from pyhook
Message-ID: <1190900757.719106.305800@d55g2000hsg.googlegroups.com>

I use pyhook to monitor user usage of keyboard and mouse. According to
pyhook specs, event.time hold the number of seconds since the epoch.
However, when I use the example source code I get numbers like
358054093, which translates to 07 May 1981..

Can anyone explain to me what am I doing wrong?

Thanks.



From zzbbaadd at aol.com  Mon Sep 10 21:03:11 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Mon, 10 Sep 2007 18:03:11 -0700
Subject: Enum class with ToString functionality
In-Reply-To: <87bqca9hrw.fsf@benfinney.id.au>
References: <1189416537.050002.61120@r34g2000hsd.googlegroups.com>
	<87bqca9hrw.fsf@benfinney.id.au>
Message-ID: <1189472591.797327.189180@w3g2000hsg.googlegroups.com>


>
> I'd like to know if the Cheeseshop package 'enum' is useful to
> you. Any constructive feedback would be appreciated.
>
>     <URL:http://cheeseshop.python.org/pypi/enum/>

Looking at the documentation it looks excellent. But I don't
understand the 0.4.2 version number, particularly when you refer to it
as robust.



From prudek at bvx.cz  Mon Sep 10 16:20:37 2007
From: prudek at bvx.cz (Milos Prudek)
Date: Mon, 10 Sep 2007 22:20:37 +0200
Subject: Why zlib not included in Python tarball?
Message-ID: <200709102220.37853.prudek@bvx.cz>

 I need to install my own Python. I compiled Python 2.4.4 from sources. zlib 
did not compile - it's not in the lib-dynload directory.

I did not have this problem with any of my earlier Python compiles. I 
routinely compile Python from source.

What is the correct procedure for installing zlib from source into Python?

-- 
Milos Prudek


From andres.j.new at gmail.com  Sun Sep 30 22:04:21 2007
From: andres.j.new at gmail.com (andresj)
Date: Mon, 01 Oct 2007 02:04:21 -0000
Subject: Using fractions instead of floats
In-Reply-To: <87ir5rzju5.fsf@benfinney.id.au>
References: <1191202509.853059.222530@k79g2000hse.googlegroups.com>
	<87ir5rzju5.fsf@benfinney.id.au>
Message-ID: <1191204261.346282.269460@y42g2000hsy.googlegroups.com>

On Sep 30, 6:48 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> andresj <andres.j.... at gmail.com> writes:
> > The problem arises when you try to represent some number, like 0.4 in
> > a float.
>
> Which is really a specific case of the general problem that, for any
> given number base, some non-integer numbers cannot be exactly
> represented as fractions.

Yes. That's what I meant to say, by giving an example.

> > Secondly, what happens if I need to sum 1/3 and 0.4? I could use
> > Decimal to represent 0.4 precisely, but what about 1/3?
>
> What about the sum of   (pi) and  2 (sqrt(2))?

Mm... To be honest I hadn't thought of that in the moment I wrote the
last post...
But I think then, that I'll be more specific, so that my proposal only
deals with *rational numbers*, not irrationals.

>
> > So the solution I think is using a fraction type/class
>
> As explained above, a fractional-number class only shifts the "exact
> representation" problem, it doesn't solve it.

I don't understand completely what you said, but I think you are
saying that it doesn't solve the problem with irrational numbers.
Which is exactly what this proposal doesn't solve. (Mainly because I
do not know of any way of doing it in "normal" math).

(While I write this, my mind reminds me of operating with roots " 2
(sqrt(2))", which I think could be solved in another similar way,
although it has some more specific use cases... But in any case,
that's not in the scope of this proposal, as they are irrational
numbers.)





From carsten at uniqsys.com  Tue Sep  4 00:43:26 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Tue, 4 Sep 2007 00:43:26 -0400
Subject: list index()
In-Reply-To: <1188874564.111842.87750@57g2000hsv.googlegroups.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<46d674c2$0$417$426a34cc@news.free.fr>
	<878x7te9h4.fsf@benfinney.id.au>
	<MPG.2146681e70c0336a98970f@news.individual.de>
	<1188874564.111842.87750@57g2000hsv.googlegroups.com>
Message-ID: <20070904043441.M52954@uniqsys.com>

On Mon, 03 Sep 2007 19:56:04 -0700, TheFlyingDutchman wrote
> [...] my fork of Python 3, which I am 
> pleased to announce now, is called Python 3.01 while in development, 
> and will be known as Python 3000 or Python 3K when it gets to a productional
> release.

I hope you're joking.

-Carsten



From wizzardx at gmail.com  Tue Sep 11 14:42:43 2007
From: wizzardx at gmail.com (David)
Date: Tue, 11 Sep 2007 20:42:43 +0200
Subject: Help With PyParsing of output from win32pdhutil.ShowAllProcesses()
In-Reply-To: <1189534321.833098.114700@g4g2000hsf.googlegroups.com>
References: <1189534321.833098.114700@g4g2000hsf.googlegroups.com>
Message-ID: <18c1e6480709111142m700414d7qf6d49d381c7e0f1a@mail.gmail.com>

On 9/11/07, Steve <sreisscruz at gmail.com> wrote:
> Hi All (especially Paul McGuire!)
>
> Could you lend a hand in the grammar and paring of the output from the
> function win32pdhutil.ShowAllProcesses()?
>
> This is the code that I have so far (it is very clumsy at the
> moment) :

Any particular reason you need to use pyparsing? Seems like an
overkill for such simple data.

Here's an example:

import pprint

X="""Process Name   ID Process,% Processor Time,% User Time,%
Privileged Time,Virtual Bytes Peak,Virtual Bytes
PyScripter             2572     0     0     0 96370688 96370688
vmnetdhcp              1184     0     0     0 13942784 13942784
vmount2                 780     0     0     0 40497152 38400000
ipoint                  260     0     0     0 63074304 58531840"""

data = []
for line in X.split('\n')[1:]: # Skip the first row
    split = line.split()
    row = [split[0]] # Get the process name
    row += [int(x) for x in split[1:]] # Convert strings to int, fail
if any aren't.
    data.append(row)

pprint.pprint(data)

# Output follows:
#
#[['PyScripter', 2572, 0, 0, 0, 96370688, 96370688],
# ['vmnetdhcp', 1184, 0, 0, 0, 13942784, 13942784],
# ['vmount2', 780, 0, 0, 0, 40497152, 38400000],
# ['ipoint', 260, 0, 0, 0, 63074304, 58531840]]
#


From robin at reportlab.com  Wed Sep 19 08:20:38 2007
From: robin at reportlab.com (Robin Becker)
Date: Wed, 19 Sep 2007 13:20:38 +0100
Subject: Odd files; just left behind?
Message-ID: <46F11416.4020506@chamonix.reportlab.co.uk>

I see a folder .python-eggs in my home directory on one of our servers with 
various .so files

~/.python-eggs/MySQL_python-1.2.2-py2.3-freebsd-6.1-SECURITY-i386.egg-tmp/_mysql.so

are these just left behind from some install process?
-- 
Robin Becker



From santi_anti at yahoo.com  Wed Sep 12 10:52:16 2007
From: santi_anti at yahoo.com (susanti marsol)
Date: Wed, 12 Sep 2007 07:52:16 -0700 (PDT)
Subject: calculate matrik
Message-ID: <948344.40034.qm@web63110.mail.re1.yahoo.com>

how to calculate the matrik? can u  give me the sintax code?
thanks so much before.

       
---------------------------------
Be a better Globetrotter. Get better travel answers from someone who knows.
Yahoo! Answers - Check it out.
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From kyosohma at gmail.com  Mon Sep 17 16:31:19 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 17 Sep 2007 13:31:19 -0700
Subject: Extracting xml from html
Message-ID: <1190061079.025479.129070@w3g2000hsg.googlegroups.com>

Hi,

I am attempting to extract some XML from an HTML document that I get
returned from a form based web page. For some reason, I cannot figure
out how to do this. I thought I could use the minidom module to do it,
but all I get is a screwy traceback:

Traceback (most recent call last):
  File "\\mcisnt1\repl$\Scripts\PythonPackages\Development\clippy
\xml_parser.py", line 69, in ?
    inst = ApptParser(url)
  File "\\mcisnt1\repl$\Scripts\PythonPackages\Development\clippy
\xml_parser.py", line 19, in __init__
    xml = self.getXml(url)
  File "\\mcisnt1\repl$\Scripts\PythonPackages\Development\clippy
\xml_parser.py", line 30, in getXml
    doc = xml.dom.minidom.parse(f)
  File "C:\Python24\lib\xml\dom\minidom.py", line 1915, in parse
    return expatbuilder.parse(file)
  File "C:\Python24\lib\xml\dom\expatbuilder.py", line 928, in parse
    result = builder.parseFile(file)
  File "C:\Python24\lib\xml\dom\expatbuilder.py", line 207, in
parseFile
    parser.Parse(buffer, 0)
ExpatError: mismatched tag: line 1, column 357

Here's a sample of the html:

<html>
<body>
lots of screwy text including divs and spans
<Row status="o">
    <RecordNum>1126264</RecordNum>
    <Make>Mitsubishi</Make>
    <Model>Mirage DE</Model>
</Row>
</body>
</html>

What's the best way to get at the XML? Do I need to somehow parse it
using the HTMLParser and then parse that with minidom or what?

Thanks a lot!

Mike



From svenn.bjerkem at googlemail.com  Thu Sep 27 15:40:37 2007
From: svenn.bjerkem at googlemail.com (Svenn Are Bjerkem)
Date: Thu, 27 Sep 2007 19:40:37 -0000
Subject: Script to extract text from PDF files
In-Reply-To: <1190843416.313377.13700@w3g2000hsg.googlegroups.com>
References: <fdbh95$smc$1@solaris.cc.vt.edu>
	<1190746968.162359.39890@r29g2000hsg.googlegroups.com>
	<1190747931.415834.75670@n39g2000hsh.googlegroups.com>
	<1190839750.537205.193110@d55g2000hsg.googlegroups.com>
	<1190843416.313377.13700@w3g2000hsg.googlegroups.com>
Message-ID: <1190922037.922012.193760@57g2000hsv.googlegroups.com>

On Sep 26, 11:50 pm, byte8b... at gmail.com wrote:
> On Sep 26, 4:49 pm, Svenn Are Bjerkem <svenn.bjer... at googlemail.com>
> wrote:
>
> > I have downloaded this package and installed it and found that the
> > text-extraction is more or less useless. Looking into the code and
> > comparing with the PDF spec show a very early implementation of text
> > extraction. Luckily it is possible to overwrite the textextraction
> > method in the base class without having to fiddle with the original
> > code. I tried to contact the developer to offer some help on
> > implementing text extraction, but he didn't answer my emails.
> > --
> > Svenn
>
> Well, feel free to send any ideas or help to me! It seems simple... Do
> a binary read. Find 'stream' and 'endstream' sections.
> zlib.decompress() all the streams. Find BT and ET markers (Begin Text
> & End Text) and finally locate the parens within those and string the
> text together. This works great on 3 out of 10 PDF documents, but my
> main issue seems to be the zlib compressed streams. Some of them don't
> seem to be FlateDecodeable (although they claim to be) or the header
> is somehow incorrect. But, once I get a good stream and decompress it,
> things are OK from that point on. Seriously, if you have ideas, please
> let me know. I'll be glad to share what I've got so far.

So far I have found that extracting text from the IEEE journal papers
is not as simple as described above. The IEEE journals are typesetting
things in typical journal style with two columns body text and one
column abstract and a blob of header and author information. Take
figures and formulas and footnotes and spread them around in the
journal and you are basically using all block text layout commands
there is in PDF.

I wanted to to get the pdftotext from xpdf package to see what that
tool does to the IEEE pdfs in order to see if I should dive into the
sources to see what they do to get things right. So far I have not got
this far. Purpose of my work was to extract the abstract of each paper
to put into a database for later search, but IEEE also has a search
engine on their journal DVD => postpone python work.

Got my gentoo machine back on track so that may maybe change
again......
--
Svenn



From shriphanip at gmail.com  Thu Sep 27 06:44:08 2007
From: shriphanip at gmail.com (Shriphani)
Date: Thu, 27 Sep 2007 10:44:08 -0000
Subject: comparing elements of a list with a string
In-Reply-To: <mailman.1057.1190742568.2658.python-list@python.org>
References: <1190734785.439839.303030@50g2000hsm.googlegroups.com>
	<XLSdnddmo6KUq2TbnZ2dnUVZ_vShnZ2d@comcast.com>
	<mailman.1057.1190742568.2658.python-list@python.org>
Message-ID: <1190889848.653434.178450@g4g2000hsf.googlegroups.com>

Hello,
Would that mean that if I wanted to append all the (date, time) tuples
to a list, I should do something like:

for file in list_of_backup_files:
    some_list.append(file)
By the way I did this:

def listAllbackups(filename):
	list_of_backups = glob(home+'/Desktop/backupdir/*%s*'%filename)
	for element in list_of_back:
		if element.find(file) != -1:
			date_components = element.split('-')[-4:-1]
			date = str(date_components[0]) + ":" + str(date_components[1]) +
":" + str(date_components[2])
			time = element.split('-')[-1]
			yield (date, time)
print listAllbackups('fstab')


I ran it in the terminal and I got:

<generator object at 0x81ed58c>

Why does it do that and not just print out all the values of (date,
time)
Regards,
Shriphani Palakodety



From prudek at bvx.cz  Mon Sep 10 16:17:04 2007
From: prudek at bvx.cz (Milos Prudek)
Date: Mon, 10 Sep 2007 22:17:04 +0200
Subject: uninstall
In-Reply-To: <1189432555.060384.194820@50g2000hsm.googlegroups.com>
References: <mailman.318.1189431943.2658.python-list@python.org>
	<1189432555.060384.194820@50g2000hsm.googlegroups.com>
Message-ID: <200709102217.06094.prudek@bvx.cz>

> If you're installing from sources "manually", you might want to
> consider checkinstall to give you the option of an uninstall for those
> software distributions which don't support "make uninstall":

I know about checkinstall and I often use it. If I remember correctly, Python 
failed to work with it. I admit I did not try to use checkinstall this time.

-- 
Milos Prudek


From duncan.booth at invalid.invalid  Tue Sep 25 06:51:42 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 25 Sep 2007 10:51:42 GMT
Subject: sorteddict PEP proposal [started off as orderedict]
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
Message-ID: <Xns99B678A84BB7duncanbooth@127.0.0.1>

Mark Summerfield <m.n.summerfield at googlemail.com> wrote:

>     When handling collections of key-value data, it is often
>     convenient to access the data in key order.  One way to do this is
>     to use an unsorted data structure (e.g., a Python dict), and then
>     sort the keys as needed. Another way is to use a sorted data
>     structure (e.g., a sorteddict as proposed in this PEP), and simply
>     access the keys, knowing that they are always in sorted order.

Please define 'sorted order' and make sure it is customisable.

>     keys(firstindex : int = None, secondindex : int = None) ->
>  list of keys

I don't really see the point of this, but general support for slicing
might be interesting: 

   sd[start:end] -> list of values for all keys such that start <= key <
   end (using the appropriate definition of 'sorted order'). 


>     key(index : int) -> value
> 
>     item(index : int) -> (key, value)
> 
>     value(index : int) -> key

I'm confused: the key method returns a value and the value method
returns a key??? 

> 
>     set_value(index : int, value)
> 
>     delete(index : int)

All of those can of course be replaced with a single method that returns
the key at a specified index and then using that key. Yes that would be
less efficient, but I'd rather have as close to a standard dictionary
interface as possible. 

> Examples
> 
>     To keep a collection of filenames on a case-insensitive file
>     system in sorted order, we could use code like this:
> 
>         files = collections.sorteddict.sorteddict()
>         for name in os.listdir("."):
>             files[name.lower()] = name
> 
>     We can add new filenames at any time, safe in the knowledge that
>     whenever we call files.values(), we will get the files in
>     case-insensitive alphabetical order.

I don't see this as a terribly useful example since you don't explain 
why we need to keep filenames in case-insensitive alphabetical order at 
all. If we want to print a list of filenames we can sort them once when 
printing them, why do we need to keep them 'always sorted'?

>     To be able to iterate over a collection of data items in various
>     predetermined orders, we could maintain two or more sorteddicts:
> 
>         itemsByDate = collections.sorteddict.sorteddict()
>         itemsByName = collections.sorteddict.sorteddict()
>         itemsBySize = collections.sorteddict.sorteddict()
>         for item in listOfItems:
>             itemsByDate["%s\t%17X" % (item.date, id(item))] = item
>             itemsByName["%s\t%17X" % (item.name, id(item))] = item
>             itemsBySize["%s\t%17X" % (item.size, id(item))] = item

I think perl might make you use strings as keys, fortunately Python 
doesn't. What I really don't like about this is that you've copied the 
date, so if you mutate item.date the itemsByDate are no longer sorted.

Again it sounds like sorting for printing will be less overhead that 
keeping them always sorted. You need to come up with examples where 
there is an actual benefit to not sorting for output.

>     Here we have used the item IDs to ensure key uniqueness.

If you are going to do this then it really does need to be:

   itemsByDate = sorteddict(items, key=lambda self, k: self[k].date)

so that you can maintain sorted order when mutating an item. How the 
dictionary knows that its contents have been mutated is another question 
entirely.

> 
>     Now we can iterate in date or name order, for example:
> 
>         for item in itemsByDate:
>             print item.name, item.date

Which we can do just as well with an ordinary dictionary:

   for item in sorted(items, key=byDate):
       ...

given an appropriate definition of byDate.

The cases I can think of where a sorteddict might be useful would be 
things like collecting web server statistics and maintaining a regularly 
updated display of the top n pages. You need a combination of factors 
for this to be useful: frequent updates, and frequent extraction of 
sorted elements + the requirement to access elements as a dictionary.

Also, none of your use cases target any of the additional fripperies you 
threw into your proposal.


From timr at probo.com  Sat Sep 15 02:05:40 2007
From: timr at probo.com (Tim Roberts)
Date: Sat, 15 Sep 2007 06:05:40 GMT
Subject: smtp debugging methods
References: <Pine.WNT.4.64.0709140015140.888@frna_yncgbc>
Message-ID: <sgtme35i2qn34ohfq6ivoklqv0d1nd2cbt@4ax.com>

Sean Nakasone <seannakasone at yahoo.com> wrote:
>
>I'm having trouble with sending smtp mail.  It's hanging after the 
>smtplib.SMTP() line. It doesn't works from home but not from work.  What's 
>the best way to debug this?

It's quite possible that your network at work has a firewall blocking these
ports.  Many employers allow outgoing connections only on ports 25, 80, and
443.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From sjmachin at lexicon.net  Wed Sep  5 09:00:29 2007
From: sjmachin at lexicon.net (John Machin)
Date: Wed, 05 Sep 2007 06:00:29 -0700
Subject: Looping through File Question
In-Reply-To: <1188995195.932117.111440@k79g2000hse.googlegroups.com>
References: <1188989934.436165.213680@w3g2000hsg.googlegroups.com>
	<1188992047.858695.174790@r34g2000hsd.googlegroups.com>
	<1188995195.932117.111440@k79g2000hse.googlegroups.com>
Message-ID: <1188997229.977198.23100@22g2000hsm.googlegroups.com>

On Sep 5, 10:26 pm, planetmatt <planetm... at gmail.com> wrote:
> On 5 Sep, 12:34, John Machin <sjmac... at lexicon.net> wrote:
>
>
>
> > On Sep 5, 8:58 pm, planetmatt <planetm... at gmail.com> wrote:
>
> > > I am a Python beginner.  I am trying to loop through a CSV file which
> > > I can do.  What I want to change though is for the loop to start at
> > > row 2 in the file thus excluding column headers.
>
> > > At present I am using this statement to initiate a loop though the
> > > records:
>
> > > for line in f.readlines():
>
> > > How do I start this at row 2?
>
> > The quick answer to your literal question is:
> >   for line in f.readlines()[1:]:
> > or, with extreme loss of elegance, this:
> >   for lino, line in enumerate(f.readlines()):
> >       if not lino:
> >           continue
>
> > But readline and readlines are old hat, and you wouldn't want to read
> > a file of a few million lines into a big list, so a better answer is:
>
> >     _unused = f.next()
> >     for line in f:
>
> > But you did say you were reading a CSV file, and you don't really want
> > to do your own CSV parsing, even if you think you know how to get it
> > right, so best is:
>
> >     import csv
> >     rdr = csv.reader(f)
> >     heading_row = rdr.next()
> >     for data_row in rdr:
>
> > HTH,
> > John
>
> Thanks so much for the quick response.  All working now.
>
> I had looked at the CSV module but when I ran into another problem of
> trying to loop through all columns, I was given a solution in another
> forum which used the readlines() method.

Antique advice which still left you doing the CSV parsing :-)

>
> I have looked at the CSV documentation but didn't see any mention of
> heading_row or data_row.

Ummm ... 'heading_row' and 'data_row' are identifiers of the kind that
you or I would need to make up in any language; why did you expect to
find them in the documentation?

> Is there a definitive Python documentation
> site with code examples like MS's MSDN?

The definitive Python documentation site is (I suppose) http://www.python.org/doc/

I don't know what "code examples like MS's MSDN" means. I avoid MSDN
like I'd avoid a nurse carrying a bottle of Dettol and a wire
brush :-)

Here's an example of sucking your data into a list of lists and
accessing it columnwise:

rdr = csv.reader(f)
whatever_you_want_to_call_the_heading_row = rdr.next()
data = list(rdr)
sum_col_5 = sum(float(row[5]) for row in data)
print "The value in row 3, column 4 is", data[3][4]

HTH,
John



From ivanwangcn at gmail.com  Sun Sep  2 10:28:19 2007
From: ivanwangcn at gmail.com (Ivan Wang)
Date: Sun, 02 Sep 2007 07:28:19 -0700
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
In-Reply-To: <1188740716.423349.304370@y42g2000hsy.googlegroups.com>
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
	<1188735642.391419.103650@19g2000hsx.googlegroups.com>
	<1188740716.423349.304370@y42g2000hsy.googlegroups.com>
Message-ID: <1188743299.664137.194760@d55g2000hsg.googlegroups.com>

On Sep 2, 9:45 pm, jwrweather... at gmail.com wrote:
> [snip code]
>
> Thanks for that. I realise that improving the algorithm will speed
> things up. I wanted to know why my less than perfect algorithm was so
> much slower in python than exactly the same algorithm in C. Even when
> turning off gcc's optimiser with the -O0 flag, the C version is still
>
>
>
> > 100 times quicker.- Hide quoted text -
>
> - Show quoted text -
Maybe Python is  the slowest programming language in the world.
So there is a joke: some python hater said that "python" can only
crawl rather than run. :)

Python is slow because:
(1) dynamic binding
(2) it is a interpretation language
For example, in C code, an interger expression "a+b" will directly
generate an assembly code "add" for x86 processors.
A python interpreter, on the other side, need detect the type of a and
b first, then choose the right "+" operation for them and use a
evaluation stack to get the result.

Psyco is a JIT compiler with just in time specialization which can
somehow solve these two problems




From ldo at geek-central.gen.new_zealand  Sun Sep  9 02:53:32 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sun, 09 Sep 2007 18:53:32 +1200
Subject: Does shuffle() produce uniform result ?
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
	<mailman.243.1187955760.32294.python-list@python.org>
	<tooru_honda-7C82D1.10432725082007@wvnews01.netvigator.com>
	<tooru_honda-58C552.20355225082007@wvnews01.netvigator.com>
	<tooru_honda-978B9E.11304526082007@wvnews01.netvigator.com>
	<slrnfdnojg.inr.apardon@rcpc42.vub.ac.be>
	<7xejhfbsjo.fsf@ruckus.brouhaha.com>
	<slrnfdpup6.inr.apardon@rcpc42.vub.ac.be>
	<7xabs39bin.fsf@ruckus.brouhaha.com>
	<13drijhfqlvlk96@corp.supernews.com> <fbvmg0$1p3$3@lust.ihug.co.nz>
	<7xhcm4pl5m.fsf@ruckus.brouhaha.com>
Message-ID: <fc059c$aa2$6@lust.ihug.co.nz>

In message <7xhcm4pl5m.fsf at ruckus.brouhaha.com>, Paul Rubin wrote:

> Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> writes:
>
>> Except that the NSA's reputation has taken a dent since they failed to
>> anticipate the attacks on MD5 and SHA-1.
> 
> NSA had nothing to do with MD5 ...

Nevertheless, it was their job to anticipate attacks on it. After all, they
call themselves the "National _Security_ Agency", don't they?

> ... and it's to NSA's credit that SHA-1 held up for as long as it did.

But they have no convincing proposal for a successor. That means the gap
between the classified and non-classified state of the art has shrunk down
to insignificance.



From s.mientki at id.umcn.nl  Wed Sep 26 03:49:34 2007
From: s.mientki at id.umcn.nl (stef)
Date: Wed, 26 Sep 2007 09:49:34 +0200
Subject: ANN: PyPE 2.8.7
In-Reply-To: <1190782415.470011.226800@w3g2000hsg.googlegroups.com>
References: <mailman.1037.1190715307.2658.python-list@python.org>
	<f082a$46f8e4f1$83aef404$21115@news1.tudelft.nl>
	<b0514$46f8e6fc$83aef404$21614@news1.tudelft.nl>
	<1190782415.470011.226800@w3g2000hsg.googlegroups.com>
Message-ID: <38f8f$46fa0f10$83aef404$19681@news1.tudelft.nl>

thebjorn wrote:
> On Sep 25, 12:46 pm, stef <s.mien... at id.umcn.nl> wrote:
>   
>> Another problem,
>> I tried to run PyPE in my "old IDE",
>>     
>
> instead of double-clicking on the PyPE.exe file? Why?
>   
to get the traceback.

cheers,
Stef


From bbxx789_05ss at yahoo.com  Sat Sep 15 18:50:23 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sat, 15 Sep 2007 15:50:23 -0700
Subject: (wxPython) wx.ProgressDialog - how to cancel out of?
In-Reply-To: <rvrme3tb8snr5rnqgf5p8g1g4ponp0nbfj@4ax.com>
References: <rvrme3tb8snr5rnqgf5p8g1g4ponp0nbfj@4ax.com>
Message-ID: <1189896623.369696.233870@57g2000hsv.googlegroups.com>


Terry Carroll wrote:
> I'm trying to use wx.ProgressBar, and the cancel button is not
> responding.
>
> Here is a simple program that exhibits the problem:
>
> #########################################################
> import  wx
> import time
>
> max = 10
> app = wx.PySimpleApp()
> dlg = wx.ProgressDialog("Progress dialog example",
>                        "variables to be shown here",
>                        maximum = max,
>                        style = wx.PD_CAN_ABORT
>                         | wx.PD_CAN_SKIP
>                         #| wx.PD_APP_MODAL
>                         | wx.PD_ELAPSED_TIME
>                         | wx.PD_ESTIMATED_TIME
>                         | wx.PD_REMAINING_TIME
>                         )
>
> keepGoing = True
> skip = False
> count = 0
>
> while keepGoing and count < max:
>     count += 1
>     wx.MilliSleep(1000)
>     #time.sleep(1)
>     newtext = "(before) count: %s, keepGoing: %s, skip: %s " % \
>               (count, keepGoing, skip)
>     print newtext
>     (keepGoing, skip) = dlg.Update(count, newtext)
>     newtext = "(after) count: %s, keepGoing: %s, skip: %s " % \
>               (count, keepGoing, skip)
>     print newtext
> dlg.Destroy()
> #########################################################
>
> The dialog looks right when this runs, but....
>
> What's right: I get a progress bar;  it includes "Skip" and "Cancel"
> buttons; it shows 10 seconds of progress, and updates once per second
> with the variables' values on each iteration.
>
> What's wrong is that I can't get clicking on the "Skip" or "Cancel"
> buttons to have any effect.  Instead, as soon as the dialog displays,
> I get an hourglass, and it doesn't matter what I click on.  Here's
> what the print statements display, consistently, regardless of what I
> try to click or whether I click nothing at all:
>
> I:\python>test1.py
> (before) count: 1, keepGoing: True, skip: False
> (after) count: 1, keepGoing: True, skip: False
> (before) count: 2, keepGoing: True, skip: False
> (after) count: 2, keepGoing: True, skip: True
> (before) count: 3, keepGoing: True, skip: True
> (after) count: 3, keepGoing: True, skip: True
> (before) count: 4, keepGoing: True, skip: True
> (after) count: 4, keepGoing: True, skip: True
> (before) count: 5, keepGoing: True, skip: True
> (after) count: 5, keepGoing: True, skip: True
> (before) count: 6, keepGoing: True, skip: True
> (after) count: 6, keepGoing: True, skip: True
> (before) count: 7, keepGoing: True, skip: True
> (after) count: 7, keepGoing: True, skip: True
> (before) count: 8, keepGoing: True, skip: True
> (after) count: 8, keepGoing: True, skip: True
> (before) count: 9, keepGoing: True, skip: True
> (after) count: 9, keepGoing: True, skip: True
> (before) count: 10, keepGoing: True, skip: True
> (after) count: 10, keepGoing: True, skip: True
>
> Two oddities here:
>
> 1) As I read the docs, the keepGoing variable should be set to True,
> unless I click on "Cancel," in which case it should be set to False
> (which would end the loop).  That doesn't happen.  This is really what
> I'm most concerned here with.
>
> 2) The variable "skip: set to False on the first iteration, and then
> set to True on subsequent iterations?  Note that this happens even if
> no buttons are selected.  This is just a weirdness to me, and not my
> main concern, but I thought I'd mention it in case it's relevant.
>
> You can see some variations in the commented-out code that I tried;
> they did not help.
>
> Relevant software and releases:
>
> OS: Windows XP Home Edition, Version 2002, SP2
> Python: ActivePython 2.5.0.0
> wxPython: 2.8.1.1 (msw-unicode)
>
> Any help appreciated.

Or, if you want the progress dialog to start when your app starts--
rather than after a user clicks on a button--you can use a short
timer:

import wx

app = wx.PySimpleApp()

win = wx.Frame(None, -1, "Test Progress Dialog")
timer = wx.Timer(win)
#win.Bind(wx.EVT_TIMER, on_timer_expiry, timer)

def on_timer_expiry(evt):
    max = 10
    dialog = wx.ProgressDialog(
            "Loading",
            "progress:",
            max,
            style = wx.PD_CAN_ABORT
                |wx.PD_ELAPSED_TIME
                |wx.PD_ESTIMATED_TIME
                |wx.PD_REMAINING_TIME
    )


    keep_going = True
    skip = False
    count = 0
    while keep_going and (count < max):
        count += 1
        wx.MilliSleep(1000)

        (keep_going, skip) = dialog.Update(count)
        print skip

    dialog.Destroy()
    timer.Stop()

win.Bind(wx.EVT_TIMER, on_timer_expiry, timer)
timer.Start(1000)

win.Show()
app.MainLoop()



From steve at REMOVE-THIS-cybersource.com.au  Sat Sep 15 01:35:23 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sat, 15 Sep 2007 05:35:23 -0000
Subject: How to avoid overflow errors
References: <13em8vnr527rq20@corp.supernews.com>
	<mailman.560.1189817022.2658.python-list@python.org>
Message-ID: <13emror796r4vae@corp.supernews.com>

On Fri, 14 Sep 2007 21:43:38 -0300, Eduardo O. Padoan wrote:

>> How do I subclass int and/or long so that my class also auto-converts
>> only when needed?
> 
> What about just subclassing long - is this not an option?

Of course it's an option. As it turned out, that was the easiest way for 
me to proceed. I was a little concerned that the overhead of using longs 
might have been excessive, but for values close to zero (and by close I 
mean < millions) there's no significant time difference between 
arithmetic with ints and longints.


-- 
Steven.


From michele.simionato at gmail.com  Sat Sep  1 12:44:11 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Sat, 01 Sep 2007 16:44:11 -0000
Subject: metaclasses: timestamping instances
In-Reply-To: <mailman.277.1188662918.28954.python-list@python.org>
References: <f4cc03640709010706x352f097wdfe9e7fc3612580b@mail.gmail.com>
	<mailman.277.1188662918.28954.python-list@python.org>
Message-ID: <1188665051.107414.61200@50g2000hsm.googlegroups.com>

On Sep 1, 6:07 pm, Steve Holden <st... at holdenweb.com> wrote:
<snip>
>
> Debugging with Wing IDE and examining the classes at a breakpoint shows
> this to be true (even after Y's __metaclass__ assignment is commented out):
>
>  >>> X.__metaclass__
> <class '__main__.Meta'>
>  >>> Y.__metaclass__
> <class '__main__.Meta'>
>  >>>

For the benefit of the readers I will just point out that in order
to determine the metaclass of a class it is far better NOT to relay on
the
__metaclass__ attribute. The right thing to to is to look at the
__class__
attribute, or to use type. Here is a (made up) example
where .__metaclass__ gives
the wrong result:


In [9]: class M(type): pass
   ...:

In [10]: class B: __metaclass__ = M
   ....:

In [11]: B.__metaclass__ = None # now the hook is set to None, but the
metaclass does not change

In [12]: B.__class__
Out[12]: <class '__main__.M'>

       Michele Simionato



From zzbbaadd at aol.com  Wed Sep 12 13:35:30 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Wed, 12 Sep 2007 10:35:30 -0700
Subject: Python 3K or Python 2.9?
In-Reply-To: <5kq1hgF4r90oU1@mid.individual.net>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
Message-ID: <1189618530.872819.136450@57g2000hsv.googlegroups.com>

On Sep 12, 4:40 am, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:
> Ivan Voras wrote:
> > What does "self" have to do with an object model? It's an
> > function/method argument that might as well be hidden in the
> > compiler without ever touching the role it has (if not, why?). I
> > agree that it's needless noise in a language.
>
> If this was needless, why do C++ and Java have the "this" pointer?
>
"this" in C++ and Java is not shown in the parameter list, which was
what he was
complaining about.  He wants

class MyClass:
        def SomeFunction(someParameter):
           self.someParameter = someParameter

not

class MyClass:
        def SomeFunction(self, someParameter):
           self.someParameter = someParameter


The confusing way about the current Python method when you first
encounter it is
 why is "self" being passed in when you write the function but not
when you call it. If the compiler is smart enough to know that

    a = MyClass()
    a.SomeFunction(12)

SomeFunction() has a "self" implicitly added to the parameter list, it
seems that it should be smart enough to know that a function defined
in a class has a "self" implicitly added to the parameter list.




From goon12 at gmail.com  Wed Sep 12 07:55:59 2007
From: goon12 at gmail.com (Joe Riopel)
Date: Wed, 12 Sep 2007 07:55:59 -0400
Subject: How can I work on VIM for python code such as cscope for C code?
In-Reply-To: <1189585041.556933.77350@22g2000hsm.googlegroups.com>
References: <1189585041.556933.77350@22g2000hsm.googlegroups.com>
Message-ID: <6a2ccd190709120455j428e6f51v60f6f824540f677f@mail.gmail.com>

On 9/12/07, Evan <xdicry at gmail.com> wrote:
> Hi, guys ~~
>
> How can i work on VIM for python code?  I use cscope plugin on VIM for
> C code before, it helps me to  different function and search C
> variable where it is defined.

Change to the top level directory that contains your python source
files, and do
find -name '*.py' > cscope.files
cscope -b

Then it should work.

> Do I need to downlaod other software/plugin?

You might, if do you not have the cscope_maps.vim plugin. If not you
can get it http://cscope.sourceforge.net/cscope_vim_tutorial.html and
just put it in your vim plugins directory.


From george.sakkis at gmail.com  Fri Sep 14 18:51:25 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 14 Sep 2007 22:51:25 -0000
Subject: Python 3K or Python 2.9?
In-Reply-To: <1189618530.872819.136450@57g2000hsv.googlegroups.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
Message-ID: <1189810285.757220.9310@19g2000hsx.googlegroups.com>

On Sep 12, 1:35 pm, TheFlyingDutchman <zzbba... at aol.com> wrote:

> On Sep 12, 4:40 am, Bjoern Schliessmann <usenet-mail-0306.20.chr0n... at spamgourmet.com> wrote:
> > Ivan Voras wrote:
> > > What does "self" have to do with an object model? It's an
> > > function/method argument that might as well be hidden in the
> > > compiler without ever touching the role it has (if not, why?). I
> > > agree that it's needless noise in a language.
>
> > If this was needless, why do C++ and Java have the "this" pointer?
>
> "this" in C++ and Java is not shown in the parameter list, which was
> what he was
> complaining about.  He wants
>
> class MyClass:
>         def SomeFunction(someParameter):
>            self.someParameter = someParameter
>
> not
>
> class MyClass:
>         def SomeFunction(self, someParameter):
>            self.someParameter = someParameter

If one *really* wants this, it is doable in python too:
http://www.voidspace.org.uk/python/weblog/arch_d7_2006_12_16.shtml#e583

George



From Summercoolness at gmail.com  Sun Sep 16 21:23:20 2007
From: Summercoolness at gmail.com (Summercool)
Date: Mon, 17 Sep 2007 01:23:20 -0000
Subject: where are the .pyc files?
In-Reply-To: <5l57t1F655kfU5@mid.uni-berlin.de>
References: <1189963710.714191.74440@n39g2000hsh.googlegroups.com>
	<5l57t1F655kfU5@mid.uni-berlin.de>
Message-ID: <1189992200.860524.58620@w3g2000hsg.googlegroups.com>

On Sep 16, 10:36 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>
> The `*.pyc` files are usually only created when you import a module, not
> when a module is run directly.

how come a program that runs directly doesn't need to be optimized
into bytecode first?  Or... is it that the interpreter will just run
the program as it goes by, without ever generating a .pyc file?   So
what if you have a program that you only update every few weeks...
then you can ask a .pyc to be generated so that it runs faster every
time?




From bj_666 at gmx.net  Fri Sep  7 10:21:38 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 7 Sep 2007 14:21:38 GMT
Subject: Using s.sort([cmp[, key[, reverse]]]) to sort a list of objects
	based on a attribute
References: <1189173455.525144.326300@y42g2000hsy.googlegroups.com>
Message-ID: <5kd53iF31i6hU6@mid.uni-berlin.de>

On Fri, 07 Sep 2007 06:57:35 -0700, cjt22 wrote:

> I have a step class and store in a list step instances
> A step instance contains variables: name, startTime etc and startTime
> is stored as a string %H:%M:%S
> 
> What I would like to do is to be able to sort this list of objects
> based on the startTime object so that the first item in the list is
> the object with the earliest Start time and last item is the object
> with the last Start time.
> 
> I belive my key has to be = strpTime(step.sTime, "%H:%M:%S")
> But don't know how to create the comparison funciton.
> 
> Any help on how I can perform this whole operation would be much
> appreciated.

This should be enough::

  steps.sort(key=lambda s: s.startTime)

If you sort strings of the form 'hh:mm:ss' the represented times are
sorted chronological.  No need to convert them to a number first.

If the "natural" sort criterion for `Step` objects is the start time you
might override `__cmp__()` of `Step`\s instead::

    def __cmp__(self, other):
        return cmp(self.startTime, other.startTime)

Now you can just sort the list with ``steps.sort()``.

Ciao,
	Marc 'BlackJack' Rintsch


From joemystery123 at gmail.com  Sat Sep 22 22:39:43 2007
From: joemystery123 at gmail.com (crybaby)
Date: Sat, 22 Sep 2007 19:39:43 -0700
Subject: newb: glob on windows os.renames creates many nested folders
Message-ID: <1190515183.389916.92240@19g2000hsx.googlegroups.com>

when I do this in my python code and run it in windows xp, it creates
ctemp/..../.../.../../ so on and creates file t.  Not file starting
with the name complist and ending with .txt (complist*.txt).  Any idea
why this may be? glob only works in *nix not on windows?

os.renames(glob.glob('complist*.txt')
[0],r'temp/'.join(glob.glob('complist*.txt')[0]))



From __peter__ at web.de  Mon Sep 24 08:01:09 2007
From: __peter__ at web.de (Peter Otten)
Date: Mon, 24 Sep 2007 14:01:09 +0200
Subject: sorting a list numbers stored as strings
References: <1190632366.863711.100680@y42g2000hsy.googlegroups.com>
Message-ID: <fd88u5$8m6$00$1@news.t-online.com>

aine_canby wrote:

> I have the following list -
> 
> ["1", "11", "2", "22"]
> 
> how do I sort it like this -
> 
> ["1", "2", "11", "22"]

>>> items = ["1", "11", "2", "22"]
>>> items.sort(key=int)
>>> items
['1', '2', '11', '22']

This is more efficient than Amit's compare function and even Bruno's
decorate-sort-undecorate (DSU) -- which of course only matters if the list
becomes a bit larger. 

Peter


From mail at microcorp.co.za  Sat Sep  1 03:52:03 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 1 Sep 2007 09:52:03 +0200
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>	<1188497498.3468.60.camel@dot.uniqsys.com>	<mailman.188.1188546300.28954.python-list@python.org>	<0v2dnaYWyv4HWkrbnZ2dnUVZ_oTinZ2d@speakeasy.net><1188551958.728836.137370@x35g2000prf.googlegroups.com>
	<fb9m39$mf3$1@sea.gmane.org>
Message-ID: <01f401c7ec71$4c2e22a0$03000080@hendrik>

 "Steve Holden" <steve at holdenweb.com> wrote:


> Paddy wrote:
> > My accent is probably from the East Midlands of the UK, but is not
> > pronounced.
> > 
> If your accent isn't pronounced how do we know what it sounds like?
> 

When he says pronounced, he doesn't mean pronounced,  he means pronounced!

-  To shamelessly paraphrase the Master - (Plum of course)

; - )  - Hendrik



From http  Fri Sep  7 22:17:44 2007
From: http (Paul Rubin)
Date: 07 Sep 2007 19:17:44 -0700
Subject: Generating a unique identifier
References: <13e2fgbbpsatm39@corp.supernews.com>
	<7x3axq7a8a.fsf@ruckus.brouhaha.com>
	<13e3us269f59s7a@corp.supernews.com>
Message-ID: <7xd4wt99yv.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> writes:
> > unique_id = itertools.count(1234567890)
> 
> Sweet!
> 
> I really must make itertools second-nature. I always forget it.

Beware that count() output (like enumerate) is always <= sys.maxint.
It raises an exception if it overflows.  IMO this is a bug.

> > def unique_id():
> >    return os.urandom(10).encode('hex')
> 
> Any time I see something using a random number to generate IDs, I worry 
> about collisions. Am I being paranoid? (But even paranoids write code 
> with bugs...)

Well, the idea is to make the string long enough (I shouldn't have
picked 10 bytes) to make the probability of collisions acceptably low.
The probability is about exp(-k**2/(2*N)) where k is the number of
id's you use and N is the number of possible ID's.  So with
os.urandom(20), if you use 1 billion (= approx 2**30) id's, 
the probability is about exp(-(2**60 / 2*2**160)) = 1/exp(2**101)
which is extremely small.  Using random strings is probably safer
from collisions than maintain keep distinct initial counters
across multiple runs of a program, on multiple computers, etc.

The classic example is ethernet cards.  Each one is supposed to have a
unique hardware 48-bit MAC address, with routers etc. relying on the
uniqueness.  Some organization is supposed to assign a unique code to
each manufacturer, and then the manufacturer uses that code as a
prefix and assigns addresses in sequence within that space.  That
works fine until sales go up, manufacturers start opening multiple
factories operating out of the same space, low-rent manufacturers
start making up their own codes, etc.  So companies that buy large
numbers of cards often find multiple cards with the same address,
causing various hassles.  If they just assigned 128-bit MAC addresses
at random it's very unlikely that there would ever be a collision.

> Here's something which is a little less predictable than a straight 
> counter:

It's still very easy to generate valid id's from that, or guess the
next one with non-negligible probability.  IMO it's almost never worth
messing with a "little less predictable".  If you're trying to prevent
an actual opponent from guessing something, use full-strength
cryptography.

You could try something like this:

    import sha, os, itertools

    radix = 2**32   # keep this == 2**(some even number <= 80)
    secret_key = os.urandom(20)

    def prp(key, n):
       # pseudo-random permutation (8-round Feistel network)
       # transform n to a unique number < radix**2
       assert 0 <= n < radix**2

       def F(i,x):
         return int(sha.new('%s,%x,%x'%(key,i,x)).hexdigest(), 16) % radix

       a,b = divmod(n, radix)
       for i in xrange(8):
         a ^= F(i,b)
         a,b = b,a   
       return radix*a + b

    unique_id = (prp(secret_key, i) for i in itertools.count())

It should be pretty secure and (unless I made an error) is a 
permutation from [0:radix**2] to [0:radix**2], similar to DES.
It's invertible if you know the secret key (I'll leave that as an
exercise).  8 rounds is probably overkill for radix 2**32.


From michael at stroeder.com  Tue Sep  4 06:22:20 2007
From: michael at stroeder.com (=?ISO-8859-1?Q?Michael_Str=F6der?=)
Date: Tue, 04 Sep 2007 12:22:20 +0200
Subject: FCGI app reloading on every request
In-Reply-To: <HG5Di.1553$Sd4.772@nlpi061.nbdc.sbc.com>
References: <46DCDE59.8060109@animats.com> <46DCE052.40708@v.loewis.de>
	<HG5Di.1553$Sd4.772@nlpi061.nbdc.sbc.com>
Message-ID: <s7ovq4-3eb.ln1@nb2.stroeder.com>

John Nagle wrote:
> 
>     What's actually happening is that FCGI isn't running at all.
> My .fcgi file is being executed by Apache's CGI handler, and
> "fcgi.py" recognizes this, then reads the parameters as if
> a CGI program.  So it works just like a CGI program: one
> load per request.  Not sure why Apache is doing that yet.
> I'm looking at Apache configuration files now.

Are you running mod_fastcgi oder mod_fcgid?

Disclaimer: I don't claim to be an expert in that. My web2ldap source
distribution contains two examples configuration files for each of the
modules above for FastCGI over Unix Domain Socket( see directory
<web2ldap-dir>/etc/httpd/, comments of sample-mod_fcgid.conf
misleading). web2ldap can also be deployed as (multi-threaded)
FastCGI-server.

Ciao, Michael.


From bj_666 at gmx.net  Sun Sep 16 13:36:33 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 16 Sep 2007 17:36:33 GMT
Subject: where are the .pyc files?
References: <1189963710.714191.74440@n39g2000hsh.googlegroups.com>
Message-ID: <5l57t1F655kfU5@mid.uni-berlin.de>

On Sun, 16 Sep 2007 17:28:30 +0000, Summercool wrote:

> so i have always heard of the .pyc files....  but for some reason i
> don't see them on the Windows platform...  when i have a program
> called  try.py  and after running it for ages, i still don't have a
> try.pyc file in my folder even if i turn the "show hidden file" to on.

The `*.pyc` files are usually only created when you import a module, not
when a module is run directly.

Ciao,
	Marc 'BlackJack' Rintsch


From aleax at mac.com  Fri Sep 28 11:16:28 2007
From: aleax at mac.com (Alex Martelli)
Date: Fri, 28 Sep 2007 08:16:28 -0700
Subject: Python 3.0 migration plans?
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>
	<%q0Li.725$ih1.539@nlpi068.nbdc.sbc.com>
Message-ID: <1i555ag.9ez4uvf4583jN%aleax@mac.com>

John Nagle <nagle at animats.com> wrote:

> TheFlyingDutchman wrote:
> > It seems that Python 3 is more significant for what it removes than
> > what it adds.
> > 
> > What are the additions that people find the most compelling?
> 
>     I'd rather see Python 2.5 finished, so it just works.

And I'd rather see peace on Earth and goodwill among men than _either_
Python 3 or your cherished "finished" 2.5 -- the comparison and implied
tradeoff make about as much sense as yours.

> All the major third-party libraries working and available with
> working builds for all major platforms.  That working set
> of components in all the major distros used on servers.
> The major hosting companies having that up and running on
> their servers.  Windows installers that install a collection
> of components that all play well together.
> 
>     That's what I mean by "working".

I.e., you mean tasks appropriate for maintainers of all the major
third-party libraries, distros, and hosting companies -- great, go
convince them, or go convince all warmongers on Earth to make peace if
you want an even harder tasks with even better potential impact on the
state of the world, then.


Alex


From jjl at pobox.com  Sun Sep 23 08:18:17 2007
From: jjl at pobox.com (John J. Lee)
Date: Sun, 23 Sep 2007 12:18:17 GMT
Subject: An Editor that Skips to the End of a Def
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87odfxjgjy.fsf@pobox.com> <7x4phpt9nf.fsf@ruckus.brouhaha.com>
	<87wsuj4152.fsf@pobox.com> <7xabrf2gmh.fsf@ruckus.brouhaha.com>
Message-ID: <87k5qhd186.fsf@pobox.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:

> jjl at pobox.com (John J. Lee) writes:
>> > I think mousing takes more mental work than typing,
>> I'm not sure this is a matter for debate, as much as physical
>> measurement.
>
> I don't know of any way to physically measure mental work.

fMRI is one.  That won't "directly" answer the question of course --
but then physical measurement and scientific progress are never
"direct", theory is always involved.


John


From kyosohma at gmail.com  Thu Sep 13 09:30:35 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 13 Sep 2007 06:30:35 -0700
Subject: wxstyledtextctrl and xml markup
In-Reply-To: <4abcb$46e93adc$83aef404$31489@news2.tudelft.nl>
References: <mailman.478.1189682613.2658.python-list@python.org>
	<1189689993.338662.267340@k79g2000hse.googlegroups.com>
	<4abcb$46e93adc$83aef404$31489@news2.tudelft.nl>
Message-ID: <1189690235.317887.262540@r29g2000hsg.googlegroups.com>

On Sep 13, 8:27 am, stef <s.mien... at id.umcn.nl> wrote:
> > I highly recommend the wxPython mailing list. Right now it is down
> > (see their website),
>
> its'up again.

That's not what the website says, but I'll take your word for it.

Mike



From michele.simionato at gmail.com  Wed Sep  5 06:32:52 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Wed, 05 Sep 2007 10:32:52 -0000
Subject: decorator and signal handler
In-Reply-To: <1188985182.617611.121740@r29g2000hsg.googlegroups.com>
References: <1188985182.617611.121740@r29g2000hsg.googlegroups.com>
Message-ID: <1188988372.077560.213590@d55g2000hsg.googlegroups.com>

On Sep 5, 11:39 am, stalex <shao... at gmail.com> wrote:
> Hi all,
>
> I wrote the following code since I want to try using a decorator to
> install signal handler:

I do have a decorator for exactly that purpose in my code. Here it is:

def on(sig):
    '''
    A factory of decorators for signal handlers. An example of usage
is

    @on(signal.SIGTERM)
    def termination(frame):
        print 'sent SIGTERM'
        raise SystemExit

    Code calling termination.signal() will send a SIGTERM signal to
the
    main thread, which in turns will call the termination handler,
which
    will print a message and raise SystemExit.
    '''
    def handler_decorator(handler):
        'Install the handler and add a .signal function attribute to
it'
        signal.signal(sig, lambda signum, frame : handler(frame))
        handler.signal = lambda : os.kill(os.getpid(), sig)
        return handler
    return handler_decorator

 Michele Simionato



From rcdailey at gmail.com  Tue Sep 25 18:16:25 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Tue, 25 Sep 2007 17:16:25 -0500
Subject: Regular Expressions: Can't quite figure this problem out
In-Reply-To: <496954360709251421l578b9dfdwcc0e67d293ede1f3@mail.gmail.com>
References: <496954360709241737o6e42e7efk29886b5631f6ca2e@mail.gmail.com>
	<a49e45f50709241827i107d0acav28431853ef403702@mail.gmail.com>
	<496954360709241853w6bb6e813ved0ec4fc80304d51@mail.gmail.com>
	<op.ty6tjyfqx6zn5v@gabriel2.softlabbsas.com.ar>
	<496954360709241917m3801e4aavee29cfef7deaf41b@mail.gmail.com>
	<fd9rs6$8b2$1@sea.gmane.org>
	<496954360709241951h6901d60etf2c4b3b5ec759f2a@mail.gmail.com>
	<op.ty6ztgx0x6zn5v@gabriel2.softlabbsas.com.ar>
	<496954360709251421l578b9dfdwcc0e67d293ede1f3@mail.gmail.com>
Message-ID: <496954360709251516teda6f2dwe8190236029e3688@mail.gmail.com>

Hmm, ElementTree.tostring() also adds a space between the last character of
the element name and the />. Not sure why it is doing this.

Something like <root/> will become <root /> after the tostring().

On 9/25/07, Robert Dailey <rcdailey at gmail.com> wrote:
>
> One thing I noticed is that it is placing an arbitrary space between " and
> />. For example:
>
>
> <root><frame type="image" /></root>
>
> Notice that there's a space between "image" and /></root>
>
> Any way to fix this? Thanks.
>
> On 9/24/07, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
> >
> > En Mon, 24 Sep 2007 23:51:57 -0300, Robert Dailey <rcdailey at gmail.com>
> > escribi?:
> >
> > > What I meant was that it's not an option because I'm trying to learn
> > > regular
> > > expressions. RE is just as built in as anything else.
> >
> > Ok, let's analyze what you want. You have for instance this text:
> > "<action></action>"
> > which should become
> > "<action/>"
> >
> > You have to match:
> > (opening angle bracket)(any word)(closing angle bracket)(opening angle
> > bracket)(slash)(same word as before)(closing angle bracket)
> >
> > This translates rather directly into this regular expression:
> >
> > r"<(\w+)></\1>"
> >
> > where \w+ means "one or more alphanumeric characters or _", and being
> > surrounded in () creates a group (group number one), which is
> > back-referenced as \1 to express "same word as before"
> > The matched text should be replaced by (opening <)(the word
> > found)(slash)(closing >), that is: r"<\1/>"
> > Using the sub function in module re:
> >
> > py> import re
> > py> source = """
> > ... <root></root>
> > ... <root/>
> > ... <root><frame type="image"><action></action></frame></root>
> > ... <root><frame type="image"><action/></frame></root>
> > ... """
> > py> print re.sub(r"<(\w+)></\1>", r"<\1/>", source)
> >
> > <root/>
> > <root/>
> > <root><frame type="image"><action/></frame></root>
> > <root><frame type="image"><action/></frame></root>
> >
> > Now, a more complex example, involving tags with attributes:
> > <frame type="image"></frame>  -->  <frame type="image" />
> >
> > You have to match:
> > (opening angle bracket)(any word)(any sequence of words,spaces,other
> > symbols,but NOT a closing angle bracket)(closing angle bracket)(opening
> > angle bracket)(slash)(same word as before)(closing angle bracket)
> >
> > r"<(\w+)([^>]*)></\1>"
> >
> > [^>] means "anything but a >", the * means "may occur many times, maybe
> > zero", and it's enclosed in () to create group 2.
> >
> > py> source = """
> > ... <root></root>
> > ... <root><frame type="image"></frame></root>
> > ... """
> > py> print re.sub(r"<(\w+)([^>]*)></\1>", r"<\1\2 />", source)
> >
> > <root />
> > <root><frame type="image" /></root>
> >
> > Next step would be to allow whitespace wherever it is legal to appear -
> > left as an exercise to the reader. Hint: use \s*
> >
> > --
> > Gabriel Genellina
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
>
>
>
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From gagsl-py2 at yahoo.com.ar  Fri Sep  7 22:42:43 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 07 Sep 2007 23:42:43 -0300
Subject: Subprocess module and unicode input
References: <1189201586.423477.28200@g4g2000hsf.googlegroups.com>
Message-ID: <op.tybdthk1x6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 07 Sep 2007 18:46:26 -0300, Matthew Lausch <mclausch at gmail.com>  
escribi?:

> I'd like to use the subprocess module with upper level characters in
> the process name or in the arguments to the process. Something like
> this:
>
> cmd = [ u'test_\u65e5\u672c\u8a9e_exec.bat', u'arg1', u'arg2' ]
> subprocess.call(cmd)
>
> But this gives the error:
>
> UnicodeEncodeError: 'ascii' codec can't encode characters in position
> 5-7: ordinal not in range(128)
>
> Is there a way around this problem? I don't want to assume any
> particular set of characters. The example above uses Japanese
> characters, but I would like to support anything.

You have to encode those unicode objects anyway - but you don't have to  
assume any encoding.
Your .bat file will be executed by CMD.EXE, and the shell expects a string  
- doesn't understand unicode objects. Like when you type that same  
commands on the console.
Use sys.getfilesystemencoding() to obtain the required encoding (likely  
"mbcs"):

fse = sys.getfilesystemencoding()
cmd = [arg.encode(fse) if isinstance(arg,unicode) else arg
        for arg in cmd]

-- 
Gabriel Genellina



From steve at REMOVE-THIS-cybersource.com.au  Sun Sep  2 18:33:31 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sun, 02 Sep 2007 22:33:31 -0000
Subject: Adding attributes stored in a list to a class dynamically.
References: <mailman.297.1188755850.28954.python-list@python.org>
	<1i3t9va.1jkz4om1sajk8pN%aleax@mac.com>
	<1188769303.724140.248630@d55g2000hsg.googlegroups.com>
Message-ID: <13dmehro14cjp05@corp.supernews.com>

On Sun, 02 Sep 2007 21:41:43 +0000, Brian Munroe wrote:

> One question though, which I haven't been able to find the answer from
> scouring the internet.  What is the difference between calling
> __setattr__ and setattr or __getattr__ and getattr, for that matter?

Have you read the following?

# setattr, getattr, delattr:
http://www.python.org/doc/lib/built-in-funcs.html

# __setattr__ etc.
http://www.python.org/doc/ref/attribute-access.html

If there is anything unclear about the descriptions, please ask.

In a nutshell, like all double-underscore methods, __setattr__ are for 
overriding behaviour in your own classes. With very few exceptions, you 
shouldn't need to directly call double-underscore methods (although you 
often may _write_ double-underscore methods).



-- 
Steven.


From pyth0nc0d3r at gmail.com  Fri Sep 21 20:20:26 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Fri, 21 Sep 2007 19:20:26 -0500
Subject: Is it possible to grab headers after you login to a site?
Message-ID: <eb79828c0709211720q5fa548cchfcfc215523d66ac@mail.gmail.com>

For instance cookie headers?  I want to login to a site and make sure the
site remembers im logged in using python and cgi.
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From wolf_tracks at invalid.com  Wed Sep 19 09:23:30 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Wed, 19 Sep 2007 06:23:30 -0700
Subject: Tutorial or Example (or Tutorial) of Using Canvas to Produce
	a Plot
In-Reply-To: <dZ%Hi.554$6p6.491@newssvr25.news.prodigy.net>
References: <phRHi.50851$Um6.35199@newssvr12.news.prodigy.net>
	<13evohih7rkd030@corp.supernews.com>
	<WPTHi.5906$FO2.4148@newssvr14.news.prodigy.net>
	<13f0b2qlvj5ige6@corp.supernews.com>
	<hnWHi.9038$z_5.1095@nlpi069.nbdc.sbc.com>
	<9ai0f39lejmjc2qbfcgo1t4h8b3e6ot9jd@4ax.com>
	<DT%Hi.552$6p6.84@newssvr25.news.prodigy.net>
	<dZ%Hi.554$6p6.491@newssvr25.news.prodigy.net>
Message-ID: <6o9Ii.9922$924.4192@newssvr23.news.prodigy.net>

Here seems to be another good source. <http://effbot.org/tkinterbook/canvas.htm>

W. Watson wrote:
> Ah, I missed your link to Chap 11. That looks very helpful.
> 
> W. Watson wrote:
>> Thanks. I've arranged for an inter-library loan(ILL), and probably 
>> will not get his book for several days yet. I've had the book before, 
>> but was really unable to get the time to pursue it (the ILL). I have 
>> his web site bookmarked. I do not yet plan to buy his book, web or 
>> hardbound yet. Maybe I can re-examine his site for examples, and find 
>> one that is appropriate.
>>
>>
>> Richard Townsend wrote:
>>> On Tue, 18 Sep 2007 13:18:36 -0700, "W. Watson"
>>> <wolf_tracks at invalid.com> wrote:
>>>
>>>> Tk is it. I'm really not interested in the others at this point.
>>>>
>>>
>>> John Grayson's book 'Python and Tkinter Programming' has a chapter on
>>> plotting Graphs and Charts. You can even download that chapter as a
>>> PDF file:
>>>
>>> http://www.manning-source.com/books/grayson/grayson_ch11.pdf
>>>
>>> See http://www.manning.com/grayson/ for more info about the book.
>>>
>>
> 

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From steve at holdenweb.com  Sun Sep 16 14:25:42 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 16 Sep 2007 14:25:42 -0400
Subject: (curses) issue about inch()
In-Reply-To: <1189960868.349377.249530@k79g2000hse.googlegroups.com>
References: <1189955232.216664.167840@19g2000hsx.googlegroups.com>	<mailman.617.1189959039.2658.python-list@python.org>
	<1189960868.349377.249530@k79g2000hse.googlegroups.com>
Message-ID: <fcjsf5$g4m$1@sea.gmane.org>

Jimmy wrote:
> On Sep 17, 12:07 am, Steve Holden <st... at holdenweb.com> wrote:
>> Jimmy wrote:
>>> hi, all
>>> I attempt to use the function inch() to get the character at the
>>> current position, and compare it with a particular character like :
>>> if screen.inch(x,y) == 'F'
>>> but this method doesn't seem work, can anyone tell me the reason and
>>> how to corrent it
>>> thanks
>> The reason is because something is wrong, and yo fix it by correcting
>> that issue.
>>
>> In other words, if you could be a bit more specific about *how* it
>> doesn't work (like, show us the code you are running,a nd any error
>> messages or evidence of incorrect results) you will be able to get some
>> help that actually helps you.
>>
>> Would you go to a car repair shop with faulty brakes and just tell them
>> "my car isn't working"?
>>
>> regards
>>   Steve
>> --
>> Steve Holden        +1 571 484 6266   +1 800 494 3119
>> Holden Web LLC/Ltd          http://www.holdenweb.com
>> Skype: holdenweb      http://del.icio.us/steve.holden
>>
>> Sorry, the dog ate my .sigline
> 
> thanks,
> actually i'm writing a game like mine,the pertainign code is:
> 
> def mark():
> 	"""mark the bomb"""
> 	(row, col) = gb.scrn.getyx()
> 	x = gb.scrn.inch(row,col)
> 	if x == 'F':
> 		gb.scrn.addch(row,col, 'X',curses.color_pair(3))
> 	else:
> 		gb.scrn.addch(row,col, 'F',curses.color_pair(3))
> 
> 	gb.scrn.move(row,col)
> 	gb.scrn.refresh()
> 
> the situation is x never equals 'F', even when it really is!
> I checked the mannual and found the return value of inch() consists
> the actual character(low 8bits)
> and the attributes, so I tried the following: (x<<24)>>24,cause I
> guess the int is 32bits long.
> but it still doesn't work :(
> 
Well first of all, thanks for reading the manual.

Let's suppose the value you are receiving is 1234 (clearly more than 8 
bits). Unfortunately for you, recent versions of Python don't just use 
32-bit integers, but extend the values into Python's long values where 
necessary. See:

 >>> (1234<<24)>>24
1234L
 >>>

What you really need is a logical and with 255:

 >>> 1234 & 255
210
 >>>

Hope this helps.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From berteun at gmail.com  Wed Sep 26 10:27:02 2007
From: berteun at gmail.com (Berteun Damman)
Date: Wed, 26 Sep 2007 14:27:02 -0000
Subject: Tracking memory usage and object life time.
In-Reply-To: <5lv1nuFadb95U1@mid.individual.net>
References: <1190808386.571152.103710@22g2000hsm.googlegroups.com>
	<5lv1nuFadb95U1@mid.individual.net>
Message-ID: <1190816822.684027.323630@w3g2000hsg.googlegroups.com>

On Sep 26, 2:31 pm, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:
> Did you check the return value of gc.collect? Also, try using
> other "insight" facilities provided by the gc module.
gc.collect states it cannot find any unreachable objects. Meanwhile
the number of objects the garbage collector has to keep track of keeps
increasing.

> You cannot "del" structures, you only "del" names. Objects are
> deleted when they are not bound to any names when and if the
> garbage collector "wants" to delete them.
I understand, but just before I del the name, I ask for the refererres
to the object the name indicates, and there's only one object. Since
it is a local variable, I think this is logical.

This object is a dictionary which contains strings as keys, and heaps
as values. This heap consists of tuples. Every string is referenced
more than once (that's logical), the heaps are only referenced once.
So I would expect those to be destroyed if I destroy the dictionary. I
furthermore assume that if I call gc.collect() I force the garbage
collector to collect? Even if it wouldn't "want" to collect
otherwise?

> Be sure to check for cyclic references, they can be a problem for
> the GC.
I don't see how these could occur. It's basically something like list
(of lists possibly) of ints/strings. No list containing itself. I'll
see whether I can make a stripped down version which exhibits the same
memory growth.

Berteun




From mail at timgolden.me.uk  Mon Sep  3 09:27:02 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Mon, 03 Sep 2007 14:27:02 +0100
Subject: Soemthing wrong w/ urllib module or something.
In-Reply-To: <eb79828c0709030622q47caf860n58e69a6c888c8e4d@mail.gmail.com>
References: <eb79828c0709021754h17c89a52ld36990c4e2a535c@mail.gmail.com>	
	<46DBC5CB.3040007@timgolden.me.uk>
	<eb79828c0709030622q47caf860n58e69a6c888c8e4d@mail.gmail.com>
Message-ID: <46DC0BA6.50606@timgolden.me.uk>

[Tim Golden]
 >> To do the obvious, can you open a socket connection
 >> to the domain you're using?
 >>
 >> <code>
 >> from socket import socket
 >> socket ().connect (("DOMAINHERE", 80))
 >>
 >> </code>
 >>
 >> or does it give you the same error?

[Lamonte Harris]
> Yeah I basically got the same error.
> 
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "<string>", line 1, in connect
> socket.error: (10053, 'Software caused connection abort')

OK, then *something's* blocking access to that host (at least)
on port 80. Can you browse the web normally from this machine?
In particular, can you browse to that site ("DOMAINHERE")?

TJG


From jo5867472 at gmail.com  Thu Sep 13 14:03:40 2007
From: jo5867472 at gmail.com (jo5867472 at gmail.com)
Date: Thu, 13 Sep 2007 18:03:40 -0000
Subject: plotting pixels in python
Message-ID: <1189706620.564963.29690@d55g2000hsg.googlegroups.com>

hi to all
I am just a beginner of python. I want to know how pixels are plotted
in python. I am not intending to use PIL because I don't need to
manipulate images. So is there a simple module for 2D graphics and
plot pixels



From steve at holdenweb.com  Sun Sep 16 11:56:38 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 16 Sep 2007 11:56:38 -0400
Subject: generating list of sub lists
In-Reply-To: <f46c52560709160209w27943ee1o206a198263db42ae@mail.gmail.com>
References: <1189931217.415065.102820@w3g2000hsg.googlegroups.com>
	<f46c52560709160209w27943ee1o206a198263db42ae@mail.gmail.com>
Message-ID: <fcjjnk$m0k$3@sea.gmane.org>

Rustom Mody wrote:
> On 9/16/07, cesco <fd.calabrese at gmail.com> wrote:
>> Hi,
>>
>> is there a one-liner to accomplish the following task?
>> >From the list
>> l = ['string1', 'string2', 'string3']
>> generate the list of lists
>> l = [['string1'], ['string1', 'string2'], ['string1', 'string2',
>> 'string3']]
>>
>> Any help would be appreciated.
>>
>> Thanks
>> Francesco
>>>> l = [1,2,3,4,5]
> 
>>>> [l[:i]  for i in range(len(l))]
> [[], [1], [1, 2], [1, 2, 3], [1, 2, 3, 4]]
> well almost works except for the first empty list. [Are you sure you
> dont want it?]
> 
> Corrected
> 
>>>> [l[:i+1] for i in range(len(l)-1)]
> [[1], [1, 2], [1, 2, 3], [1, 2, 3, 4]]
> 
> Though I wonder if there is as neat a way as the first?

 >>> [l[:i] for i in range(1, len(l))]
[[1], [1, 2], [1, 2, 3], [1, 2, 3, 4]]
 >>>

seems a slightly neater way to meet the requirement.

regards
  steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From zzbbaadd at aol.com  Tue Sep  4 01:10:41 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Mon, 03 Sep 2007 22:10:41 -0700
Subject: parameter list notation
In-Reply-To: <1188882028.165803.316540@r34g2000hsd.googlegroups.com>
References: <1188882028.165803.316540@r34g2000hsd.googlegroups.com>
Message-ID: <1188882641.899594.212400@22g2000hsm.googlegroups.com>

Well I did a search on "Python variable length arguments" and found a
hit that seems to explain the *fields parameter:

When you declare an argment to start with '*', it takes the argument
list into an array.

def foo(*args):
  print "Number of arguments:", len(args)
  print "Arguments are: ", args




From steve at holdenweb.com  Wed Sep  5 10:23:40 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 05 Sep 2007 07:23:40 -0700
Subject: Checking if elements are empty
In-Reply-To: <2323A6D37908A847A7C32F1E3662C80E010A0246@dc1ex01.air.org>
References: <2323A6D37908A847A7C32F1E3662C80E010A0246@dc1ex01.air.org>
Message-ID: <fbme5d$qa$1@sea.gmane.org>

Doran, Harold wrote:
> Dear list:
> 
> Suppose I have a string as follows
> 
> x = '  \t'ff'
> >>> x = '  \t'ff'
   File "<stdin>", line 1
     x = '  \t'ff'
                ^
SyntaxError: invalid syntax
>>>

I presume you meant

x = '  \t\'ff'


> I can split this up as
> 
> y = x.split('\t')
> 
> Which gives
> 
> [ '  ', 'ff']
> 
> len(y)
> 2
> 
> Is there a way to check if the first element of y is null?
> 

len(y[0]) == 0

would be the obvious way, assuming "null" means "the null string".

If whitespace is significant that'll do, if it isn't then you may need 
to use the strip() method to remove it before your scheck.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From sjmachin at lexicon.net  Sat Sep 29 07:22:40 2007
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 29 Sep 2007 04:22:40 -0700
Subject: Delete spaces
In-Reply-To: <1190994234.526554.110870@y42g2000hsy.googlegroups.com>
References: <1190994234.526554.110870@y42g2000hsy.googlegroups.com>
Message-ID: <1191064960.624796.115790@d55g2000hsg.googlegroups.com>

On Sep 29, 1:43 am, kou... at hotmail.com wrote:
> If I have a text file that is delimited by spaces, how do I import it
> and get to comma delimited?  Here is a row of data from the text file:
>
> 1    1    10:55:14  2    65   8.5
> 1.4+1.1                       2.5       Class-2   0
>
> I tried a few examples from the group and it didn't work, since the
> file also has a header row and a row of seperators ( -------).  The
> lengths of each row is something like 130, so there are extra spaces
> after the last value as well.  I have tried joining and other things,
> but I couldn't figure out how to get the values to come together.
> Thanks.
>
> Kou

It would help enormously if you could show us UNAMBIGUOUSLY what is in
say the first 3 lines after the headings and separators -- do this:

print repr(open("thefile", "rb").read()[:400])

The other thing you need is to know enough about the file format to
show us what is the CSV output that you require from the sample input
-- we don't have crystal balls, and are likely to make half-donkeyed
guesses, like these:

If the spaces are really tabs, use line.split('\t')

Otherwise: the file has fixed column widths, and any use of line.split
will mangle it.

The clumsy way to handle this is to count column positions, and write
something ugly like:
field1 = line[0:8]
field2 = line[8:20]
etc

"a row of seperators ( -------)" sounds suspiciously like the "column
aligned" format that can be produced by running a SQL query on a SQL
Server database using MS's "Query Analyser". It looks like this:

RecordType  ID1                  ID2         Description
----------- -------------------- ----------- ----------------------
1           12345678             123456      Widget
4           87654321             654321      Gizmoid
etc

Does your file look something like that? If so, then all you have to
do is leverage off the fact that the second line has one-space gaps
between each bunch of dashes, and you can write a little module that
will read any file like that, just as though it were a CSV file.

Over to you ....

Cheers,
John



From hniksic at xemacs.org  Wed Sep 12 10:35:36 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Wed, 12 Sep 2007 16:35:36 +0200
Subject: MemoryError on reading mbox file
References: <1189589259.662667.149730@w3g2000hsg.googlegroups.com>
Message-ID: <87veaggddz.fsf@mulj.homelinux.net>

Christoph Krammer <redtiger84 at googlemail.com> writes:

> I have to convert a huge mbox file (~1.5G) to MySQL.

Have you tried commenting out the MySQL portion of the code?  Does the
code then manage to finish processing the mailbox?


From harry.g.george at boeing.com  Tue Sep 11 08:56:12 2007
From: harry.g.george at boeing.com (Harry George)
Date: Tue, 11 Sep 2007 12:56:12 GMT
Subject: Python Database Apps
References: <1189479130.905136.196820@r34g2000hsd.googlegroups.com>
	<mailman.403.1189541226.2658.python-list@python.org>
Message-ID: <xqx8x7duzrn.fsf@cola3.ca.boeing.com>

Tom Brown <brown at esteem.com> writes:

> On Monday 10 September 2007 19:52, darien.watkins at gmail.com wrote:
>> Kindof a poll, kindof curiosity...
>>
>> What is your favorite python - database combination?  I'm looking to
>> make an app that has a local DB and a server side DB.  I'm looking at
>> python and sqlite local side and sql server side.
>>
>> Any suggestions????
>
> I have had a lot of good luck with PostgreSQL. It is easy to install and use. 
> It is also very stable. It maybe overkill for a client side database. The 
> psycopg package makes interfacing to PostgreSQL very easy and there is a 
> package for Linux and Windows to make cross-platform development a breeze.
>
> -Tom

I use postgresql as well.  I wonder if Pythonistas do so out of
concern for rigor, clarity, and scalability.  It works fine for a
quick one-off effort and still works fine after scaling to a DBMS
server supporting lots of clients, and running 10's of GBs of data.

If an app comes already designed for mysql, oracle, sqlite, db2, dbm,
etc I'll use those.  But for my own projects, it is postgresql, with
maybe SQLAlchemy (I'm back and forth on that.  Mostly stay with
straight SQL).

Of course, as long as you write DBI2 compliant code, your app doesn't
much care which DBMS you use.  The postgresql payoff is in admin
functionality and scaling and full ACID.

-- 
Harry George
PLM Engineering Architecture


From kay.schluehr at gmx.net  Wed Sep 19 06:06:57 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Wed, 19 Sep 2007 03:06:57 -0700
Subject: Metatest 0.1.0
In-Reply-To: <46F05FB1.7070807@pytex.org>
References: <mailman.721.1190126947.2658.python-announce-list@python.org>
	<1190130384.753009.142150@i13g2000prf.googlegroups.com>
	<46F006D5.3060609@pytex.org>
	<1190147863.968759.229330@g4g2000hsf.googlegroups.com>
	<46F05FB1.7070807@pytex.org>
Message-ID: <1190196417.558367.38490@o80g2000hse.googlegroups.com>

On 19 Sep., 01:30, Jonathan Fine <jf... at pytex.org> wrote:

> > there is no fundamental reason why it can't be separated from
> > eeconsole.py.
>
> OK.  That might be a good idea.

Ironically, I liked the idea of having more expressive assert
statements - a discussion you brought up. But this requires either
syntcatical analysis in the general case ( EE and assert magic ) some
particular API ( Ben Finney ) or a somewhat restricted, but fully
embedded, domain specific language ( Metatest ).

Here is what I got after an hour of hacking and filtering assert.
Additional remarks are in line comments:

_______________________________________________________________________________

 ZERO

 On Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
(Intel)]

 Reuses session report ZERO_20.eerp

_______________________________________________________________________________

# define a test function add and check it out

>>> def add(y,x):
...     return x+y
...
>>> assert add(1,2) == 0
Traceback (most recent call last):
  File "<input>", line 1, in <module>
AssertionError: 3 == 0

# An tested assertion is splitted into lhs, op, rhs. If this is not
possible assert
# won't be changed by magics.
# Here we see a simple formatting of the result in the form:
#     "%s %s %s" % (eval(lhs), op, eval(rhs))
# More elaborated formatting schemes are user defined:

>>> class MyFormatter(AssertionFormatter):
... 	def format(self, lhs, op, rhs):
... 		if op == "==":
... 			return "Expected: %s. Received: %s"%(lhs, rhs)
... 		else:
... 			return super(MyFormatter, self).format(lhs, op, rhs)
...

# The class AssertionFormatter is defined in
EasyExtend.fibers.zero.fiber.
# It provides a single method
#
#        format(lhs: str, op: str, rhs: str) -> str
#
# The default behaviour is the one
# demonstrated above. One can overwrite format in subclasses and pass
the subclass
# instance to assert.
# The arguments will be supplied by the framework.


# Here we see the new formatter in action:

>>> assert add(1,2) == 0, MyFormatter
Traceback (most recent call last):
  File "<input>", line 1, in <module>
AssertionError: Expected: 3. Received: 0

# Now it falls back to the default formatting:

?>>>
>>> !
>>> assert add(1,2) <=0, MyFormatter
Traceback (most recent call last):
  File "<input>", line 1, in <module>
AssertionError: 3 <= 0
>>> quit

--------------------.
Recorded assertions |
--------------------------------------------------------------------------------------------------
Status |eerp ln|repl ln| Assertion
-------+-------+-------
+--------------------------------------------------------------------------
ERROR  | 14    | 14    | assert add(1,2) == 0
ERROR  | 26    | 26    | assert add(1,2) == 0, MyFormatter
ERROR  | 31    | 31    | assert add(1,2) <=0, MyFormatter
-------+-------+-------
+--------------------------------------------------------------------------

Regards, Kay



From steve at holdenweb.com  Thu Sep 27 10:03:10 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 27 Sep 2007 10:03:10 -0400
Subject: Confusion regarding constructor as default value
In-Reply-To: <1190900523.963182.306590@r29g2000hsg.googlegroups.com>
References: <1190898221.833936.40480@57g2000hsv.googlegroups.com>
	<1190900523.963182.306590@r29g2000hsg.googlegroups.com>
Message-ID: <fdgd6t$fpr$1@sea.gmane.org>

aine_canby at yahoo.com wrote:
> On 27 Sep, 15:03, aine_ca... at yahoo.com wrote:
>> Why are the following different?
>>
>> def AddRow(self, rowName, tableRow=TableRow(ReleaseDate(""),
>> ExpiryDate(""))):
>>                 # check to see if the row already exists, if not add it to the
>> container
>>
>>                 if not self.dict.has_key(rowName):
>>                         self.dict[rowName] = tableRow
>>
>> def AddRow(self, rowName, tableRow):
>>                 # check to see if the row already exists, if not add it to the
>> container
>>
>>                 if not self.dict.has_key(rowName):
>>                         self.dict[rowName] = TableRow(ReleaseDate(""), ExpiryDate(""))
>>
>> It seems that when I use the first function that I'm getting duplicate
>> objects in self.dict
>>
>> Thanks for your help,
>>
>> Aine.
> 
> I've just tried the following:
> 
> Function A:
> 
> def AddRow(self, rowName, tableRow=TableRow(ReleaseDate(""),
> ExpiryDate(""))):
> 
>     print tableRow
>     if not self.dict.has_key(rowName):
>         self.dict[rowName] = tableRow
> 
> Function B:
> 
> def AddRow(self, rowName, tableRow=None):
> 
>     if tableRow==None:
>     	tableRow = TableRow(ReleaseDate(""), ExpiryDate(""))
>     # check to see if the row already exists, if not add it to the
> container
>     print tableRow
>     if not self.dict.has_key(rowName):
>         self.dict[rowName] = tableRow
> 
> Function A is giving:
> 
> <DatabaseExamination.TableRow instance at 0x011D4468>
> <DatabaseExamination.TableRow instance at 0x011D42B0> same!
> <DatabaseExamination.TableRow instance at 0x011D42B0> same!
> <DatabaseExamination.TableRow instance at 0x011D42B0> same!
> <DatabaseExamination.TableRow instance at 0x011D42B0> same!
> 
> Function B is giving:
> 
> <DatabaseExamination.TableRow instance at 0x011D0670>
> <DatabaseExamination.TableRow instance at 0x011D0760>
> <DatabaseExamination.TableRow instance at 0x011D07D8>
> <DatabaseExamination.TableRow instance at 0x011D0850>
> 
> 
> So at least I know know what is causing the problem. But I'm still not
> understanding why I can't use TableRow() as the default value in order
> to geterate new instances.
> 
Because the value of the default is computed as the funciton declaration 
is processed, whereas you seem to expect to see a new call to ExpiryDate 
each time the function is called.

> How would you implement this?
> 
> Thanks,
> 
> Aine.
> 
Function B is the canonical solution to this problem.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Sep  7 11:42:03 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 07 Sep 2007 17:42:03 +0200
Subject: Organizing Code - Packages
In-Reply-To: <1189177596.960379.244990@w3g2000hsg.googlegroups.com>
References: <1189177596.960379.244990@w3g2000hsg.googlegroups.com>
Message-ID: <46e17143$0$6189$426a74cc@news.free.fr>

xkenneth a ?crit :
> All,
> 
>     I apologize if this is a commonly asked question, but I didn't
> find anything that answered my question while searching.
> 
> So what I have right now is a few packages that contain some commonly
> used functions and another package that contains all of my custom
> error classes. I want these error classes available to me in all of
> the other packages in my library. Currently to achieve this at the top
> of every module file I have the line "from My.Library.Errors import
> *", my problem with this is that it manages to import the Errors into
> every scope that they are used. 

Ain't that what you want ??? Having "these error classes available to me 
in all of the other packages in my library" ?

If you're worried about perfs or whatever, don't worry, a module is only 
imported once - next imports will only bind the names in the importing 
namespace.

> I'm still pretty new to Python, and my
> approachs are probably very rooted in C/C++ (I've had the hardest time
> getting over not being able to overload functions), but am I doing
> this correctly?

Yes, that's the right thing to do.

>    Also, are there any good tutorials/examples out there of how to
> organize your python code into packges?

Most of the Python-specific aspects should be covered by the tutorial 
(the one in the doc). Else, it's as usual, trying to have high cohesion 
and low coupling.

Ah, yes, a couple of things:
- avoid the 'one-class-per-file' syndrom. It's perfectly ok to have tens 
of classes in a same module
- plain functions are ok too - no need to stick everything in classes.

HTH


From seanttierney at gmail.com  Fri Sep 21 19:47:17 2007
From: seanttierney at gmail.com (Sean Tierney)
Date: Fri, 21 Sep 2007 16:47:17 -0700
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <1190415741.380795.259050@y42g2000hsy.googlegroups.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<mailman.900.1190414696.2658.python-list@python.org>
	<1190415741.380795.259050@y42g2000hsy.googlegroups.com>
Message-ID: <54e1e4bc0709211647v10140c13y90c9bd68007c8398@mail.gmail.com>

Just tell him that "functions are like all  other variables and can
therefore be passed by other functions or returned by other functions.
"

If your friend understands variables and functions and he can't make
the "leap" (and assuming you're right, of course) then your friend
doesn't understand variables and functions.

Happy Friday.

Sean

On 9/21/07, Cristian <super.sgt.pepper at gmail.com> wrote:
> On Sep 21, 3:44 pm, Ron Adam <r... at ronadam.com> wrote:
>
> > I think key may be to discuss names and name binding with your friend.  How
> > a name is not the object it self, like a variable is in other languages.
> > For example show him how an object can have more than one name.  And discus
> > how names can be bound to nearly anything, including classes and functions.
>
> I could discuss name binding but it would be great if Python said this
> itself. After all, you can even bind a module with the foo = bar
> syntax by using __import__ function. If function definitions followed
> the same pattern, I think a beginner would subconsciously (maybe even
> consciously) realize that function names are just like everything
> else. Actually, this would be helpful for many people. If you come
> from a language like Java you're used to thinking of attributes and
> methods as living in different namespaces. I think a new syntax will
> encourage seasoned programmers think in a more Pythonic way.
>
> Python has done a very good job in easing people into programming. My
> friend doesn't come to me very often because the syntax is clear and
> simple and the builtin datatypes allow you to do so much. My goal is
> that I would never have to explain to him about name binding; that
> he'd pick it up by learning the language on his own. He's learned
> lists, dictionaries and even some OOP without me. I don't think name
> binding would be a stretch.
>
> > You could also discus factory functions with him.  Once he gets that a
> > function can return another function, then it won't be so much of a leap
> > for a function to take a function as an argument.
>
> I think this isn't the most intuitive way of approaching first order
> functions. It's true that if a function can return another function
> then a function must be first order (i.e., it's just like any other
> variable), but that seems almost backwards to me. I think it would
> make more sense to have beginners _know_ that functions are like all

> other variables and can therefore be passed by other functions or
> returned by other functions. That I think would be better accomplished
> if they define functions the same way you would define other variables
> that you know can be passed and returned.
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
Sean Tierney


From steven.bethard at gmail.com  Sun Sep 30 03:01:32 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 30 Sep 2007 01:01:32 -0600
Subject: Optparse and help formatting?
In-Reply-To: <mailman.1294.1191120597.2658.python-list@python.org>
References: <mailman.1294.1191120597.2658.python-list@python.org>
Message-ID: <heWdnWVA8P1R1GLbnZ2dnUVZ_vGinZ2d@comcast.com>

Tim Chase wrote:
> I've been learning the ropes of the optparse module and have been
> having some trouble getting the help to format the way I want.
> 
> I want to specify parts of an option's help as multiline.
> However, the optparse formatter seems to eat newlines despite my
> inability to find anything in optparse.py that does something
> obvious like .replace("\n", " ") to eat the newlines I stick in
> the help.  It also seems to mung tabs.  An example from my code:
> 
> parser.add_option("-x", "--extended",
>   action="callback",
>   callback=callback_test,
>   type="string",  # required to get metavar to show in help
>   dest="test",
>   metavar="CONF",
>   help="a comma-separated list of options.\n"
>     "s=[YYYY]MMDD,n=NAME,c=COLOR\n"
>     "s,start=[YYYY]MMDD\n"
>     "\tstart day of period (default, current day)\n"
>   ...
>   )
> 
> which would accept options that looked something like
> 
>   test.py -x s=20070401,n=XR71,c=black
> 
> (my callback_test breaks apart parser.rargs[0] to deal with the
> funky params).
> 
> However, when I display the help, its reformatting eats the
> newlines in my help-string and strangely looks like it converts
> my tabs to spaces.
> 
> Any hints on how to either work around the problem or fix it?

I guess this is just an optparse-y week on c.l.py. ;-)  Ben Finney 
pointed you in the right direction for optparse.

If you care to try out argparse (http://argparse.python-hosting.com/) 
which has a similar API, it has a builtin RawTextHelpFormatter formatter 
class::

     import argparse

     def my_type(string):
         # split string and turn it into appropriate object(s)
         return 'foo(%s)' % string

     parser = argparse.ArgumentParser(
         formatter_class=argparse.RawTextHelpFormatter
     )
     parser.add_argument(
         "-x", "--extended",
         type=my_type,  dest="test", metavar="CONF",
         help="a comma-separated list of options.\n"
              "s=[YYYY]MMDD,n=NAME,c=COLOR\n"
              "s,start=[YYYY]MMDD\n"
              "\tstart day of period (default, current day)\n"
     )

     args = parser.parse_args()
     print args.test

This program will produce output like::

     $ python script.py -x sdfsdfas
     foo(sdfsdfas)

     $ python script.py --help
     usage: script.py [-h] [-x CONF]

     optional arguments:
       -h, --help            show this help message and exit
       -x CONF, --extended CONF
                             a comma-separated list of options.
                             s=[YYYY]MMDD,n=NAME,c=COLOR
                             s,start=[YYYY]MMDD
                                     start day of period ...

HTH,

STeVe


From dnhkng at googlemail.com  Fri Sep  7 15:16:46 2007
From: dnhkng at googlemail.com (Dr Mephesto)
Date: Fri, 07 Sep 2007 19:16:46 -0000
Subject: creating really big lists
In-Reply-To: <1189063849.118900.327540@22g2000hsm.googlegroups.com>
References: <874pi92tr4.fsf@mulj.homelinux.net>
	<mailman.121.1189035929.2658.python-list@python.org>
	<1189057626.943757.210420@d55g2000hsg.googlegroups.com>
	<1189063849.118900.327540@22g2000hsm.googlegroups.com>
Message-ID: <1189192606.119578.100820@r34g2000hsd.googlegroups.com>

On 6 Sep., 09:30, Paul McGuire <pt... at austin.rr.com> wrote:
> On Sep 6, 12:47 am, Dr Mephesto <dnh... at googlemail.com> wrote:
>
>
>
> > I need some real speed! a database is waaay to slow for the algorithm
> > im using. and because the sublists are of varying size, i dont think I
> > can use an array...- Hide quoted text -
>
> > - Show quoted text -
>
> How about a defaultdict approach?
>
> from collections import defaultdict
>
> dataArray = defaultdict(lambda : [[],[],[],[],[]])
> dataArray[1001][3].append('x')
> dataArray[42000][2].append('y')
>
> for k in sorted(dataArray.keys()):
>     print "%6d : %s" % (k,dataArray[k])
>
> prints:
>   1001 : [[], [], [], ['x'], []]
>  42000 : [[], [], ['y'], [], []]
>
> -- Paul

hey, that defaultdict thing looks pretty cool...

whats the overhead like for using a dictionary in python?

dave



From exhuma at gmail.com  Wed Sep 19 02:54:27 2007
From: exhuma at gmail.com (exhuma.twn)
Date: Tue, 18 Sep 2007 23:54:27 -0700
Subject: Using python to create windows apps that everyone can use?
In-Reply-To: <mailman.736.1190143365.2658.python-list@python.org>
References: <7C008A37566.00000D2Atomharding@inbox.com>
	<mailman.736.1190143365.2658.python-list@python.org>
Message-ID: <1190184867.787656.181590@k79g2000hse.googlegroups.com>

On Sep 18, 9:22 pm, "Matt McCredie" <mccre... at gmail.com> wrote:
> On 9/18/07, Thomas Harding <tomhard... at inbox.com> wrote:
>
> > Hi guys, sorry to post another topic on this, as I am aware that it has
> > already been posted a few times, but not with specifically what I am looking
> > for. I want an app that makes a gui interface for python (similar to
> > Microsoft visual studio or qt designer, not a code based one) and/or an app
> > that can make this into a .exe that can be opened by any person on any
> > computer without python installed.
>
> check out py2exe:http://py2exe.org
>
> matt

I am currently building an application with Python using Qt4.3 as
widget-toolkit. So I can use designer too ;)

Links that might be of interest to you:
   - http://www.riverbankcomputing.co.uk/pyqt/
   - http://www.py2exe.org/index.cgi/Py2exeAndPyQt

This works quite well.



From mridula.ccpl at gmail.com  Mon Sep 17 02:42:17 2007
From: mridula.ccpl at gmail.com (Mridula Ramesh)
Date: Mon, 17 Sep 2007 12:12:17 +0530
Subject: adodb with mysql - connection string syntax for filepath
Message-ID: <33dffc910709162342x49657895t938fb1f8af2834de@mail.gmail.com>

Dear all,

Hi. I am not very tech-savvy so please pardon me if this is a stupid
question: so far I have been googling for about 4 days to find help for
this, so now I am desperate! :)

How do you use adodb with mysql to connect to a file that is on your
machine?

Also, could you please recommend to me a good resource to learn more about
classes and modules from? i don't understand half of the _init_ business
that many sites mention. (This *is* something even a newbie needs to learn,
right?)

Thank you!

M.R.S.
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From joemystery123 at gmail.com  Fri Sep 14 10:27:45 2007
From: joemystery123 at gmail.com (joe shoemaker)
Date: Fri, 14 Sep 2007 10:27:45 -0400
Subject: newbee: Simple Backend Python Script Question
Message-ID: <372de840709140727x65b58400jadccb24bbabbdf62@mail.gmail.com>

I need to create python script that is threaded. So the main program will
run in infinite loop and just retrieving messages and putting them in a
queue. (Main thread)

I need child threads from a pool to process the queue. When there is no
stuff in the queue, they go to the pool and become available but they don't
terminate. This has to be done continuously.

Main program need to keep putting stuff in the queue, when there are no
messages, then it sleeps for short time and check back to see any messages.

To do this, I guess you don't write joinAll(), so that the main threads just
don't wait for the child but goes to work.

am I right?

Also, child threads (a function that is threaded) will make connecitons to
the database. I am planning to use threadpool, so that threads reuse the
connections. So do you close the database connection at the end of the
function? If not then the connection will be opened forever?


Joe
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From stefan.behnel-n05pAM at web.de  Thu Sep 27 03:28:14 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Thu, 27 Sep 2007 09:28:14 +0200
Subject: How do I get the value out of a DOM Element
In-Reply-To: <1190872252.204687.286640@19g2000hsx.googlegroups.com>
References: <1190872252.204687.286640@19g2000hsx.googlegroups.com>
Message-ID: <46FB5B8E.8050100@web.de>

kj7ny wrote:
> I have been able to get xml.dom.minidom.parse('somefile.xml') and then
> dom.getElementsByTagName('LLobjectID') to work to the point where I
> get something like: [<DOM Element: LLobjectID at 0x13cba08>] which I
> can get down to <DOM Element: LLobjectID at 0x13cba08> but then I
> can't find any way to just get the value out from the thing!
> 
> .toxml() returns something like: u'<LLobjectID><![CDATA[1871203]]></
> LLobjectID>'.
> 
> How do I just get the 1871203 out of the DOM Element?

It contains a CDATA node which in turn contains a Text node (AFAIR), so you
have to walk through the children to get what you want.

Alternatively, try an XML API that makes it easy to handle XML, like
ElementTree (part of the stdlin in Python 2.5) or lxml, both of which have
compatible APIs. The code would look like this:

   tree = etree.parse("some_file.xml")
   id = tree.find("//LLobjectID")
   print id.text

Stefan


From bdesth.quelquechose at free.quelquepart.fr  Sat Sep 29 11:44:27 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 29 Sep 2007 17:44:27 +0200
Subject: Can you please give me some advice?
In-Reply-To: <mailman.1300.1191147737.2658.python-list@python.org>
References: <mailman.1300.1191147737.2658.python-list@python.org>
Message-ID: <46ffe55d$0$26294$426a74cc@news.free.fr>

Byung-Hee HWANG a ?crit :
> Hi there,
> 
> What is different between Ruby and Python? 

Not much - both are hi-level dynamic object oriented languages with some 
functional aspects - and quite a lot (their respective object models are 
totally different).

Also, Python, being somewhat older, has perhaps a better implementation, 
more 3rd part librairies, and a greater (in size) community - but it 
also suffers from cruft accumulated thru the years and a documentation 
that's getting a bit messy (not that it's badly documented, but some 
features are not necessarily covered in the official tutorial...)

> I am wondering what language
> is really mine for work.

The one that best fit your brain, I'd say - or the one that best fit 
your project.

> Anyway I will really make decision today what I have to
> study from now on. What I make the decision is more difficult than to
> know why I have to learn English. Yeah I do not like to learn English
> because it is just very painful..
> 
> Can you please give me some advice?  

Not wrt/ learning English !-)



From aahz at pythoncraft.com  Tue Sep 18 11:01:15 2007
From: aahz at pythoncraft.com (Aahz)
Date: 18 Sep 2007 08:01:15 -0700
Subject: The meaning of  a = b  in object oriented languages
References: <1190094057.976729.285120@n39g2000hsh.googlegroups.com>
	<fco0ev$hgj$1@news2.u-psud.fr>
Message-ID: <fcop7r$4qj$1@panix3.panix.com>

In article <fco0ev$hgj$1 at news2.u-psud.fr>,
Laurent Pointal  <laurent.pointal at limsi.fr> wrote:
>Summercool a ?crit :
>> 
>> The meaning of  a = b  in object oriented languages.
>> ====================================================
><zip>
>
>Oups, reading the subject I thought it was a Xah Lee post.

...and you're perpetuating the impression by continuing the crossposting.  
Please don't.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

The best way to get information on Usenet is not to ask a question, but
to post the wrong information.


From ldo at geek-central.gen.new_zealand  Wed Sep 19 07:23:27 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Wed, 19 Sep 2007 23:23:27 +1200
Subject: uninstall python2.5 on debian
References: <mailman.702.1190098989.2658.python-list@python.org>
Message-ID: <fcr0rf$f9m$1@lust.ihug.co.nz>

In message <mailman.702.1190098989.2658.python-list at python.org>, dimitri
pater wrote:

> I would like to uninstall Python2.5 which was installed
> from source (make install) and keep 2.3.

How about doing the make install again, and making a note of which files
were installed, and removing those?


From fakeaddress at nowhere.org  Sun Sep  9 20:27:29 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Sun, 09 Sep 2007 17:27:29 -0700
Subject: Modul (%) in python not like in C?
In-Reply-To: <mailman.302.1189383237.2658.python-list@python.org>
References: <880dece00709091201n449d4c2k31998a5d426de17d@mail.gmail.com>	<46E4466C.2030303@sdf.lonestar.org>	<mailman.296.1189366862.2658.python-list@python.org>	<0W%Ei.14427$3x.11615@newssvr25.news.prodigy.net>
	<mailman.302.1189383237.2658.python-list@python.org>
Message-ID: <Hb0Fi.2154$ZA5.843@nlpi068.nbdc.sbc.com>

Dotan Cohen wrote:
> On 10/09/2007, Bryan Olson <fakeaddress at nowhere.org> wrote:
>> Not according to the C standard:
>>
>>      When integers are divided, the result of the / operator is
>>      the algebraic quotient with any fractional part discarded.(87)
>>      If the quotient a/b is representable, the expression
>>      (a/b)*b + a%b shall equal a.
>>      [...]
>>      87) This is often called ''truncation toward zero''.
>>
>>      [International Standard ISO/IEC 9899:1999, Section 6.5.5
>>      Multiplicative operators, Paragraph 6 and footnote 87]
> 
> This seems most logical to me. Turbo C is against the standard, then.

No, Turbo C is yielding the one-and-only correct result with respect
to the C standard:

    (a/b)*b + a%b shall equal a

    (-111/10)*10 + -111%10 shall equal -111

    (-111/10) evaluates to -11 by the truncate-toward-zero rule

    -11*10 + -111%10 shall equal -111

    -110 + -111%10 shall equal -111

    -111%10 shall equal -1


-- 
--Bryan


From ptmcg at austin.rr.com  Thu Sep  6 03:30:49 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Thu, 06 Sep 2007 00:30:49 -0700
Subject: creating really big lists
In-Reply-To: <1189057626.943757.210420@d55g2000hsg.googlegroups.com>
References: <874pi92tr4.fsf@mulj.homelinux.net>
	<mailman.121.1189035929.2658.python-list@python.org>
	<1189057626.943757.210420@d55g2000hsg.googlegroups.com>
Message-ID: <1189063849.118900.327540@22g2000hsm.googlegroups.com>

On Sep 6, 12:47 am, Dr Mephesto <dnh... at googlemail.com> wrote:
>
> I need some real speed! a database is waaay to slow for the algorithm
> im using. and because the sublists are of varying size, i dont think I
> can use an array...- Hide quoted text -
>
> - Show quoted text -

How about a defaultdict approach?

from collections import defaultdict

dataArray = defaultdict(lambda : [[],[],[],[],[]])
dataArray[1001][3].append('x')
dataArray[42000][2].append('y')

for k in sorted(dataArray.keys()):
    print "%6d : %s" % (k,dataArray[k])

prints:
  1001 : [[], [], [], ['x'], []]
 42000 : [[], [], ['y'], [], []]

-- Paul




From daniel.j.larsson at gmail.com  Wed Sep  5 09:47:18 2007
From: daniel.j.larsson at gmail.com (Daniel Larsson)
Date: Wed, 5 Sep 2007 15:47:18 +0200
Subject: python exec behaves inconsistent with respect to module imports
In-Reply-To: <1188997944.162811.33640@r34g2000hsd.googlegroups.com>
References: <1188997944.162811.33640@r34g2000hsd.googlegroups.com>
Message-ID: <2bfa72fa0709050647v34124d8diaa1ed61c331c476e@mail.gmail.com>

On 9/5/07, carl.dhalluin at gmail.com <carl.dhalluin at gmail.com> wrote:
>
> Hello
>
> I am completely puzzled why the following exec code does not work:
>
> mycode = "import math\ndef f(y):\n    print math.floor(y)\nf(3.14)"
> def execute():
>     exec mycode
> execute()
>
>
> I get the error:
>
> root at devmachine1:/opt/qbase# python error1.py
> Traceback (most recent call last):
>   File "error1.py", line 5, in ?
>     execute()
>   File "error1.py", line 4, in execute
>     exec mycode
>   File "<string>", line 4, in ?
>   File "<string>", line 3, in f
> NameError: global name 'math' is not defined


This is due to a namespace issue with exec, see
http://docs.python.org/ref/exec.html#l2h-569

The namespace used in an exec statement is the local scope. This scope is
different in your two cases. If you change the exec call to

def execute():
    exec mycode in globals()

It will work as you expect.


Note that the following code _does_ work:
>
> mycode = "import math\ndef f(y):\n    print math.floor(y)\nf(3.14)"
> exec mycode
>
>
> I have tested this in python 2.3 and 2.4.
>
>
> Regards
> Carl
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From deets at nospam.web.de  Sat Sep 15 06:31:06 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 15 Sep 2007 12:31:06 +0200
Subject: c interfacing in 2.5
In-Reply-To: <mailman.570.1189846791.2658.python-list@python.org>
References: <mailman.570.1189846791.2658.python-list@python.org>
Message-ID: <5l1qjvF60829U1@mid.uni-berlin.de>

Rustom Mody schrieb:
> I used python extensive 3-5 years back.  Coming back I find some
> changes.  Trying to understand whats new and would appreciate any
> help/comments/pointers.
> 
> Earlier there were basically two options:
> SWIG: convenient but inefficient
> Native (Extending/Embedding): an efficient way of getting a headache!
> (Boost being ignored because not using C++)
> 
> Now it seems there are more possibilities:
> 
> -- Sip seems to be more efficient than swig and easier than native but
> not well documented
> -- pyrex could be considered
> -- I know someone who uses pygtk to make wrappings
> 
> But most interesting is ctype.  I wonder if having ctype in the core
> language changes the ease of use of the native wrapping model and
> thereby makes sip/swig etc less necessary?
> 
> Your views and/or experience appreciated.

ctypes is for C. Where it is great to use.

If you need C++-wrapping, I recommend SIP.

While the docs for SIP aren't overwhelming, I consider them accurate and 
complete. Best thing to do is to take a SIP-based project (most probably 
PyQt itself) and wheneever a question appears, rummage through it.


Diez


From bignose+hates-spam at benfinney.id.au  Wed Sep 12 20:47:27 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 13 Sep 2007 10:47:27 +1000
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
Message-ID: <87sl5j5r34.fsf@benfinney.id.au>

TheFlyingDutchman <zzbbaadd at aol.com> writes:

> I am talking about how an author describes in English the "this"
> pointer/reference in their book on programming C++ or Java.
> 
> I don't think you will find them saying that under the covers "this"
> was passed to the method (if in fact it is). They just say that it
> refers to the current object inside that object's method.

In other words, it's magic, and the behaviour has to be explained so
the reader knows where the undeclared 'this' comes from.

How is that preferable to the magic of "instance is passed as the
first argument to a method"?
-- 
 \          "If nothing changes, everything will remain the same."  -- |
  `\                                                       Barne's Law |
_o__)                                                                  |
Ben Finney



From michael at jedimindworks.com  Sun Sep  2 16:32:54 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Sun, 2 Sep 2007 13:32:54 -0700
Subject: how can I find out the process ids with a process name
In-Reply-To: <12B3D8EF-C30A-4BCC-80A5-71ADFA8F6944@jedimindworks.com>
References: <1188761187.522146.192380@y42g2000hsy.googlegroups.com>
	<12B3D8EF-C30A-4BCC-80A5-71ADFA8F6944@jedimindworks.com>
Message-ID: <76F0B67C-609B-4D27-8A90-E1965F016C31@jedimindworks.com>

>
> cd /proc
> for i in ls [0-9]*/status
> do
>      echo $i `grep '^Name' $i | cut -f2` | sed 's/\/status//g'
> done
>


Um...

cd /proc
for i in `ls [0-9]*/status`
do
     echo $i `grep '^Name' $i | cut -f2` | sed 's/\/status//g'
done


---
Let the wookie win.





From tenax.raccoon at gmail.com  Mon Sep 17 11:55:23 2007
From: tenax.raccoon at gmail.com (Jason)
Date: Mon, 17 Sep 2007 08:55:23 -0700
Subject: Use GUI for Python
In-Reply-To: <1190043073.093736.272750@k79g2000hse.googlegroups.com>
References: <1190043073.093736.272750@k79g2000hse.googlegroups.com>
Message-ID: <1190044523.666991.273910@y42g2000hsy.googlegroups.com>

On Sep 17, 9:31 am, kou... at hotmail.com wrote:
> I am new to python as I have been a VB programmer.  I am used to the
> GUI interface, and was wondering if I had to choose between a GUI for
> Python, which one should I go with?  Thanks.
>
> Kou

You need to be more specific.  Do you mean that you are used to
working in an IDE environment, where you can readily access the list
of classes, methods, and such?  You might be interested in Eclipse
[1], then installing the PyDev [2] plug-in to add Python support.
Wing-IDE [3] and Komodo [4] may also be very suitable (but they cost
money).

If you mean that you want to develop programs with a GUI interface,
then you have a number of choices [5].  Most of these choices do not
work in the same way that Microsoft Studio's GUI designer works,
partly because Python isn't tied to any of them.
  o  wxWidgets is MFC-like
  o  PyQT and PyGTK are similar to their underlying interfaces
  o  Tkinter comes with the default Python install, and provides the
Tk widget set
  o  With IronPython, you can access the regular Microsoft .NET GUIs
  o  PythonCard and EasyGUI are supposed to be pretty easy GUIs to use
  o  Dabo is a full-on database/GUI/platform set to easy cross-
platform GUI and database programming.

The links to all those can be found at link [5]. Don't be afraid if
the choices are overwhelming. You have choices.  I highly recommend
that you learn Python first, then examine the different GUI systems,
keeping in mind any requirements you may have and your previous
experience.

[1] http://www.eclipse.org/
[2] http://pydev.sourceforge.net/
[3] http://wingware.com/
[4] http://www.activestate.com/products/komodo_ide/
[5] http://wiki.python.org/moin/GuiProgramming



From w_a_x_man at yahoo.com  Sun Sep 30 14:27:32 2007
From: w_a_x_man at yahoo.com (William James)
Date: Sun, 30 Sep 2007 11:27:32 -0700
Subject: s.split() on multiple separators
In-Reply-To: <1191160394.870241.171200@w3g2000hsg.googlegroups.com>
References: <1191160394.870241.171200@w3g2000hsg.googlegroups.com>
Message-ID: <1191176852.604761.179480@y42g2000hsy.googlegroups.com>

On Sep 30, 8:53 am, mrk... at gmail.com wrote:
> Hello everyone,
>
> OK, so I want to split a string c into words using several different
> separators from a list (dels).
>
> I can do this the following C-like way:
>
> >>> c=' abcde abc cba fdsa bcd '.split()
> >>> dels='ce '
> >>> for j in dels:
>
>         cp=[]
>         for i in xrange(0,len(c)-1):
>                 cp.extend(c[i].split(j))
>         c=cp
>
> >>> c
>
> ['ab', 'd', '', 'ab', '', '']
>
> But. Surely there is a more Pythonic way to do this?
>
> I cannot do this:
>
> >>> for i in dels:
>
>         c=[x.split(i) for x in c]
>
> because x.split(i) is a list.

E:\Ruby>irb
irb(main):001:0> ' abcde abc cba fdsa bcd '.split(/[ce ]/)
=> ["", "ab", "d", "", "ab", "", "", "ba", "fdsa", "b", "d"]



From steve at REMOVE-THIS-cybersource.com.au  Sat Sep 15 19:54:58 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sat, 15 Sep 2007 23:54:58 -0000
Subject: how to join array of integers?
References: <1189859762.563599.269270@g4g2000hsf.googlegroups.com>
	<a23effaf0709150551g19c611eqe1c912acf02306d3@mail.gmail.com>
	<mailman.577.1189864628.2658.python-list@python.org>
Message-ID: <13eos6ihf2mjg4a@corp.supernews.com>

On Sat, 15 Sep 2007 15:56:40 +0200, Arnau Sanchez wrote:

> js escribi?:
> 
>>> On 9/15/07, Summercool <Summercoolness at gmail.com> wrote:
> 
>>> in Python... is the method to use  ",".join() ?  but then it must take
>>> a list of strings... not integers...
>>>
>>> any fast method?
> 
>  > print ''.join([str(i) for i in [1,2,3]])
> 
> It's better to use generator comprehension instead of LC:
> 
> ",".join(str(i) for i in [1, 2, 3])


Really? Why do you say that a generator expression is "better" than a 
list comprehension?


>>> import timeit
>>> timeit.Timer("', '.join([str(i) for i in [1,2,3]])", "").repeat()
[5.0969390869140625, 4.5353701114654541, 4.5807528495788574]
>>> timeit.Timer("', '.join(str(i) for i in [1,2,3])", "").repeat()
[11.651727914810181, 10.635221004486084, 10.522483110427856]

The generator expression takes about twice as long to run, and in my 
opinion it is no more readable. So what's the advantage?

 
> Or, if you happen to like the itertools modules:
> 
> from itertools import imap
> ",".join(imap(str, [1, 2, 3]))

>>> timeit.Timer("', '.join(imap(str, [1,2,3]))", 
... "from itertools import imap").repeat()
[9.3077328205108643, 8.655829906463623, 8.5271010398864746]

Faster than a generator expression, but still pretty slow.



-- 
Steven.


From bignose+hates-spam at benfinney.id.au  Fri Sep  7 19:47:42 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 08 Sep 2007 09:47:42 +1000
Subject: Generating a unique identifier
References: <13e2fgbbpsatm39@corp.supernews.com>
	<mailman.216.1189167281.2658.python-list@python.org>
Message-ID: <87wsv2ox5t.fsf@benfinney.id.au>

Will Maier <willmaier at ml1.net> writes:

> On Fri, Sep 07, 2007 at 12:03:23PM -0000, Steven D'Aprano wrote:
> [...]
> > which is easy enough, but I thought I'd check if there was an
> > existing solution in the standard library that I missed. Also, for
> > other applications, I might want them to be rather less
> > predictable.
> 
> 2.5 includes the uuid module for RFC 4122 universally-unique IDs:
> 
>     http://docs.python.org/lib/module-uuid.html

I second this recommendation. If you want arbitrary unique IDs that
are not a function of the data they identify, the simplest solution is
a monotonically-increasing serial number. If you want more than that,
you might as well go straight to the standard UUIDs.

Even if you're not using Python 2.5, grab the external 'python-uuid'
package for your operating system and use that. If you use the options
for including random elements, the generated UUIDs will even satisfy
your "unpredictable" requirement.

-- 
 \      "This sentence contradicts itself -- no actually it doesn't."  |
  `\                                             -- Douglas Hofstadter |
_o__)                                                                  |
Ben Finney


From grante at visi.com  Fri Sep  7 09:10:16 2007
From: grante at visi.com (Grant Edwards)
Date: Fri, 07 Sep 2007 13:10:16 -0000
Subject: unexpected behavior: did i create a pointer?
References: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>
	<46e11dfe$0$4517$9b4e6d93@newsspool3.arcor-online.net>
	<pan.2007.09.07.10.40.46@REMOVE.THIS.cybersource.com.au>
	<fbrdsm$5f3$01$1@news.t-online.com>
Message-ID: <13e2jdobu2kqkf1@corp.supernews.com>

On 2007-09-07, Peter Otten <__peter__ at web.de> wrote:
> Am Fri, 07 Sep 2007 10:40:47 +0000 schrieb Steven D'Aprano:
>
>> Python doesn't have any pointers.
>
> Thinking of python variables or "names" as pointers should
> get you a long way when trying to understand python's behaviour.

But thinking of them as names bound to objects will get you
further (and get you there faster). ;)

> As long as you keep in mind that python doesn't have pointers
> to pointers, and no pointer arithmetic either...

-- 
Grant Edwards                   grante             Yow! Hello...  IRON
                                  at               CURTAIN?  Send over a
                               visi.com            SAUSAGE PIZZA!  World War
                                                   III?  No thanks!


From hat at se-162.se.wtb.tue.nl  Mon Sep 10 06:31:39 2007
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Mon, 10 Sep 2007 12:31:39 +0200
Subject: Python wrapper, problem with subprocess read/write
References: <1189176703.245411.60350@r29g2000hsg.googlegroups.com>
Message-ID: <slrnfea78b.lv5.hat@se-162.se.wtb.tue.nl>

On 2007-09-07, NeoGregorian <neogregorian at gmail.com> wrote:
> I tried instead to use:
>
> lines = []
> line = proc.stdout.readline()
> while line :
>     lines.append(line)
>     line = proc.stdout.readline()
>
> This prints out everything except the ">" line, which is good. But
> then freezes while waiting for input, which is bad.
>
> Any suggestions on how to solve this in a good way?

'readline()' reads a line, that is, some text ending with a new-line. Since
your last line, the ">" prompt has no ending new-line, the call blocks, waiting
for the new-line character.

So the simple anser is "don't use readline()".

You have to fall back to reading characters, such as "read(1)" (which block
until it receives a character).
In addition, you will have to do analysis on whether the line you are currently
reading is a prompt, and if so, stop reading to prevent blocking.
(and instead, give the program a command by writing to proc.stdin).


In case you don't know, pexpect (Python expect) does all (and more) that you
are trying to do.


Sincerely,
Albert


From jergosh at wp.pl  Wed Sep  5 05:45:29 2007
From: jergosh at wp.pl (=?UTF-8?B?R3J6ZWdvcnogU8WCb2Rrb3dpY3o=?=)
Date: Wed, 05 Sep 2007 11:45:29 +0200
Subject: So what exactly is a complex number?
In-Reply-To: <1188821241.516029.229020@o80g2000hse.googlegroups.com>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>	<mailman.212.1188576194.28954.python-list@python.org>	<451mq4-les.ln1@ozzie.tundraware.com>	<mailman.266.1188644067.28954.python-list@python.org>	<lbjpq4-eo22.ln1@ozzie.tundraware.com>	<mailman.310.1188805355.28954.python-list@python.org>
	<1188821241.516029.229020@o80g2000hse.googlegroups.com>
Message-ID: <46DE7AB9.9000702@wp.pl>


>> In fact, a proper vector in physics has 4 features: point of
>> application, magnitude, direction and sense.
>>     
>
> so whats the "point of application" of the sum of two vectors?  Do
> tell.
I believe vectors can only be added if they have the same point of 
application. The result is then applied to the same point.

Regards,
Greg


From lasses_weil at klapptsowieso.net  Fri Sep  7 05:56:14 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Fri, 07 Sep 2007 11:56:14 +0200
Subject: Class design (information hiding)
In-Reply-To: <fbr2gg$ipg$1@online.de>
References: <fbr2gg$ipg$1@online.de>
Message-ID: <46e1203e$0$16117$9b4e6d93@newsspool1.arcor-online.net>

Alexander Eisenhuth wrote:
> As I figured out there is only public and private possible as speakin in 
> "C++ manner". Are you all happy with it. What does "the zen of python" 
> say to that design? (protected is useless?)
> 
Ask it yourself:
   >>> import this

> 
> class A:
>     def __init__(self):
>         self.__z = 1
>         self._z = 2
>         self.z = 3
>     def _getX(self):
>         return "X"
>     def __getY(self):
>         return "Y"
>     def doAnything(self):
>         print self.__getY()
> 
> 
> class B(A):
>     def __init__(self):
>         A.__init__(self)
>         print dir (self)
>  >>> b = B()
> ['_A__getY', '_A__z', '__doc__', '__init__', '__module__', '_getX', 
> '_z', 'doAnything', 'z']
> 
> I was a bit surprised about '_A__getY' and '_A__z'.
> 
In what way exactly? "__*"-type methods are meant to be private to the 
exact class they were defined in, so thats why you get these names 
prefixed with "_A__". If you're confused why that happens at all, look 
for "name mangling".

> What would you say to a C++ Programmer about class interfaces in big 
> Python systems? What is the idea behind the _ and __ naming. Use or 
> don't use '_' methods ? (As Designer of the software, as Programmer of 
> the software)
> 
Don't worry about information-hiding too much. If anyone is determined, 
they can get at any information they want. You should just rely on 
people not directly using a single-underscore method; thats how python 
does it: trust instead of force.
Use the double underscore technique only when you *need* it, that is, 
you don't want a method to be overridden by a subclass -- for whatever 
reason that might be. Generally you can just forget about this type of 
methods.

/W


From exhuma at gmail.com  Wed Sep 19 03:19:57 2007
From: exhuma at gmail.com (exhuma.twn)
Date: Wed, 19 Sep 2007 00:19:57 -0700
Subject: Using python to create windows apps that everyone can use?
In-Reply-To: <mailman.736.1190143365.2658.python-list@python.org>
References: <7C008A37566.00000D2Atomharding@inbox.com>
	<mailman.736.1190143365.2658.python-list@python.org>
Message-ID: <1190186397.712075.114330@g4g2000hsf.googlegroups.com>

On Sep 18, 9:22 pm, "Matt McCredie" <mccre... at gmail.com> wrote:
> On 9/18/07, Thomas Harding <tomhard... at inbox.com> wrote:
>
> > Hi guys, sorry to post another topic on this, as I am aware that it has
> > already been posted a few times, but not with specifically what I am looking
> > for. I want an app that makes a gui interface for python (similar to
> > Microsoft visual studio or qt designer, not a code based one) and/or an app
> > that can make this into a .exe that can be opened by any person on any
> > computer without python installed.
>
> check out py2exe:http://py2exe.org
>
> matt

Oh... I forgot. With newer versions of Qt, you have to adapt the setup
script a bit. Here's an example (even with an icon-resource ) ;)

setup(windows=['ide.py'], options={"py2exe":{
   "includes":["sip", "PyQt4._qt"],
   "icon_resources":[(1,"gnucash.ico")]}})

The trick here, is to also add "PyQt4._qt" to the includes.



From carl.dhalluin at gmail.com  Wed Sep  5 09:12:24 2007
From: carl.dhalluin at gmail.com (carl.dhalluin at gmail.com)
Date: Wed, 05 Sep 2007 13:12:24 -0000
Subject: python exec behaves inconsistent with respect to module imports
Message-ID: <1188997944.162811.33640@r34g2000hsd.googlegroups.com>

Hello

I am completely puzzled why the following exec code does not work:

mycode = "import math\ndef f(y):\n    print math.floor(y)\nf(3.14)"
def execute():
    exec mycode
execute()


I get the error:

root at devmachine1:/opt/qbase# python error1.py
Traceback (most recent call last):
  File "error1.py", line 5, in ?
    execute()
  File "error1.py", line 4, in execute
    exec mycode
  File "<string>", line 4, in ?
  File "<string>", line 3, in f
NameError: global name 'math' is not defined


Note that the following code _does_ work:

mycode = "import math\ndef f(y):\n    print math.floor(y)\nf(3.14)"
exec mycode


I have tested this in python 2.3 and 2.4.


Regards
Carl



From khemkaamit at gmail.com  Fri Sep 21 02:12:31 2007
From: khemkaamit at gmail.com (Amit Khemka)
Date: Fri, 21 Sep 2007 11:42:31 +0530
Subject: global name is not defined - but this is actually a function's
	name
In-Reply-To: <33dffc910709202259h699c04a3w111f0fa23966a59d@mail.gmail.com>
References: <33dffc910709202259h699c04a3w111f0fa23966a59d@mail.gmail.com>
Message-ID: <1360b7230709202312j48bd3b85x8729b6ff74fe90c7@mail.gmail.com>

On 9/21/07, Mridula Ramesh <mridula.ccpl at gmail.com> wrote:
> hi.
>
> i'm a beginner and i'm trying to get the hang of classes and functions. my
> code looks like this:
>
>
> <code>
> class showRecord(main):
>     def __init__(self):
>         global gmax
>         #now to create the screen by placing all the widgets
>         rt = Tk()
>         showbuttons()
>         #call the scroller to DoSomething
>         scroll()
>
>     def showbuttons(self):
>         # NAVIGATION BAR------
>         NavBut1 = Button(rt, text="|<", width=6, height=2,
> bg="DarkSeaGreen", fg="Black")
>         NavBut1.grid(row=10, column=20, padx=6, pady=6, columnspan=3)
>         NavBut2 = Button(rt, text="<<", width=6, height=2,
> bg="DarkSeaGreen", fg="Black")
>         NavBut2.grid (row=10, column=25, padx=6, pady=6, columnspan=3)
>         #widget bindings
>         NavBut2.bind('<Button-1>', lambda e:GoPrev(ctr))
> </code>
>
>
> my problem is at the 6th line: showbuttons()
> the error says "global name "showbuttons" is not defined.... but it's not a
> global variable. what am i doing wrong?

use self.showbuttons()

> also, should i say ...
>
> def showbuttons(self):

This should work !


Cheers,

-- 
----
Amit Khemka
website: www.onyomo.com
wap-site: www.owap.in


From __peter__ at web.de  Wed Sep 12 05:37:15 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 12 Sep 2007 11:37:15 +0200
Subject: function to do dynamic import?
References: <13ecb84p1ghrd64@corp.supernews.com>
	<1189491152.601490.33880@o80g2000hse.googlegroups.com>
	<13eehnapt0r0jc2@corp.supernews.com>
Message-ID: <fc8c0b$3us$02$2@news.t-online.com>

Am Wed, 12 Sep 2007 11:54:51 +1000 schrieb bambam:

> def gim():
>     exec "global gamel"
>     exec "import gamel"
> 
> Unfortunately, does not have the desired effect.
> Steve.

Both statements have to be part of a single exec:

def gim():
    modulename = "gamel" # determined at runtime
    exec "global %s; import %s" % (modulename, modulename)

It may work, but it is still a bad idea to create global variables with a
name not known until runtime.

Peter


From wizzardx at gmail.com  Fri Sep 21 16:16:36 2007
From: wizzardx at gmail.com (David)
Date: Fri, 21 Sep 2007 22:16:36 +0200
Subject: executing list of methods (and collecting results)
In-Reply-To: <46F301B6.10801@fmed.uba.ar>
References: <46F301B6.10801@fmed.uba.ar>
Message-ID: <18c1e6480709211316m4a6b23fdob6623d278bf70baf@mail.gmail.com>

> I wondering if is this a good pattern to apply, i like the way it looks
> like, at least to me it looks `natural', but...im calling every method
> twice here? One in v_dict and again on the dict iteration?
>
> Any suggestion will be great!

Another suggestion is to use a naming convention for your validators.
Then you don't need a separate dict that lists them. Just run through
your module or class dict and process each method/function whose name
starts with a certain pattern. You can also cache the names the first
time round so you don't have to match string patterns every time that
collect_validators() runs.


From ivonet at gmail.com  Fri Sep 21 15:56:47 2007
From: ivonet at gmail.com (Ivo)
Date: Fri, 21 Sep 2007 21:56:47 +0200
Subject: elementtree question
In-Reply-To: <fd0lmi$pm8$1@foggy.unx.sas.com>
References: <fd0lmi$pm8$1@foggy.unx.sas.com>
Message-ID: <46f4211c$0$3030$e4fe514c@dreader31.news.xs4all.nl>

Tim Arnold wrote:
> Hi, I'm using elementtree and elementtidy to work with some HTML files. For 
> some of these files I need to enclose the body content in a new div tag, 
> like this:
> <body>
>   <div class="remapped">
>    original contents...
>   </div>
> </body>
> 
> I figure there must be a way to do it by creating a 'div' SubElement to the 
> 'body' tag and somehow copying the rest of the tree under that SubElement, 
> but it's beyond my comprehension.
> 
> How can I accomplish this?
> (I know I could put the class on the body tag itself, but that won't satisfy 
> the powers-that-be).
> 
> thanks,
> --Tim Arnold
> 
> 

You could also try something like this:

from sgmllib import SGMLParser
class IParse(SGMLParser):
     def __init__(self, verbose=0):
         SGMLParser.__init__(self, verbose)
         self.data = ""
     def _attr_to_str(self, attrs):
         return ' '.join(['%s="%s"' % a for a in attrs])

     def start_body(self, attrs):
         self.data += "<body %s>" % self._attr_to_str(attrs)
         print "remapping"
         self.data += '''<div class="remapped">'''
     def end_body(self):
         self.data += "</div>" # end remapping
         self.data += "</body>"
     def handle_data(self, data):
         self.data += data
     def unknown_starttag(self, tag, attrs):
         self.data+="<%s %s>" % (tag,  self._attr_to_str(attrs),)
     def unknown_endtag(self, tag):
         self.data += "</%s>" % tag


if __name__=="__main__":
     i = IParse()
     i.feed('''
<html>
     <body bgcolor="#fffff">
         original
         <i>italic</i>
         <b class="test">contents</b>...
     </body>
</html>''');

     print i.data
     i.close()


just look at the code from sgmllib (standard lib) and it is very easy to 
make a parser. for some much needed refactoring



From gnewsg at gmail.com  Mon Sep 17 14:13:23 2007
From: gnewsg at gmail.com (=?iso-8859-1?q?Giampaolo_Rodol=E0?=)
Date: Mon, 17 Sep 2007 11:13:23 -0700
Subject: ANN: Python FTP Server library (pyftpdlib) 0.2.0 released
Message-ID: <1190052803.192708.77410@n39g2000hsh.googlegroups.com>

Hi,
I'm pleased to announce release 0.2.0 of Python FTP Server library
(pyftpdlib).
http://code.google.com/p/pyftpdlib/


=== About ===

Python FTP server library provides an high-level portable interface to
easily write asynchronous FTP servers with Python.
Based on asyncore framework pyftpdlib is actually the most complete
RFC959 FTP server implementation available for Python programming
language.


=== Major changes ===

  * Support for FXP, site-to-site transfers.
  * NAT/Firewall support with PASV (passive) mode connections.
  * Configurable range of ports to use for passive data transfers.
  * Per-user messages configurability.
  * Maximum connections limit.
  * Per-source-IP limits.
  * Maximum login attempts limit.

A complete list of changes including enhancements and bug fixes is
available here:
http://code.google.com/p/pyftpdlib/wiki/ReleaseNotes02


=== More links: ===

  * Source tarball: http://pyftpdlib.googlecode.com/files/pyftpdlib_0.2.0.tar.gz
  * Online docs: http://code.google.com/p/pyftpdlib/wiki/Tutorial

  * FAQs: http://code.google.com/p/pyftpdlib/wiki/FAQ
  * Roadmap: http://code.google.com/p/pyftpdlib/wiki/Roadmap

  * Issue tracker: http://code.google.com/p/pyftpdlib/issues/list


Thanks,

-- Giampaolo Rodola' < g.rodola [at] gmail [dot] com >



From fakeaddress at nowhere.org  Tue Sep 25 04:57:59 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Tue, 25 Sep 2007 01:57:59 -0700
Subject: Google and Python
In-Reply-To: <1i4xorh.j5nc9k3y60vqN%aleax@mac.com>
References: <1190228512.627109.308910@n39g2000hsh.googlegroups.com>
	<ufadnRC5BPZm6GzbnZ2dnUVZ_jOdnZ2d@comcast.com>
	<1190231094.276099.136250@22g2000hsm.googlegroups.com>
	<mailman.781.1190232163.2658.python-list@python.org>
	<1190235678.019823.315850@o80g2000hse.googlegroups.com>
	<SYpIi.5291$7P7.2845@newssvr19.news.prodigy.net>
	<1i4rfyx.8vuc2j14j596uN%aleax@mac.com>
	<SFJJi.316$ua4.285@newssvr22.news.prodigy.net>
	<1i4xorh.j5nc9k3y60vqN%aleax@mac.com>
Message-ID: <344Ki.547$ua4.285@newssvr22.news.prodigy.net>

Alex Martelli wrote:
> Bryan Olson <fakeaddress at nowhere.org> wrote:
>    ...
>>> YouTube (one of Google's most valuable properties) is essentially
>>> all-Python (except for open-source infrastructure components such as
>>> lighttpd).  Also, at Google I'm specifically "Uber Tech Lead, Production
>>> Systems": while I can't discuss details, my main responsibilities relate
>>> to various software projects that are part of our "deep infrastructure",
>>> and our general philosophy there is "Python where we can, C++ where we
>>> must". 
>> Good motto. So is most of Google's code base now in
>> Python? About what is the ratio of Python code to C++
>> code? Of course lines of code is kine of a bogus measure.
>> Of all those cycles Google executes, about what portion
>> are executed by a Python interpreter?
> 
> I don't have those numbers at hand, and if I did they would be
> confidential: you know that Google doesn't release many numbers at all
> about its operations, most particularly not about our production
> infrastructure (not even, say, how many server we have, in how many data
> centers, with what bandwidth, and so on).
> 
> Still, I wouldn't say that "most" of our codebase is in Python: 

Can you see how that motto, "Python where we can, C++ where
we must," might lead people to a false impression of how much
Google uses Python versus C++, especially on "production
systems"? I tried to Google-up that motto; your post seems
to be Google's first disclosure of it.

[...]
> To me, on the contrary, it seems
> self-evident that if a company X enjoys great success employing
> technique Y, this *DOES* make something of a case for another company Z
> to seriously consider and probably try out Y, when attempting tasks
> analogous to those X has had success with, to see if some of the success
> could not be replicable in Z's own similar tasks. 

Similar tasks to what made Google a great success? I'm not
seeing many of those.

People seem to think they should duplicate the way Google
does things, but without deep understanding of how and why
they work for Google. An impossible task, because it's
about the most un-Googley thing anyone could do.

> This is the heart of
> "benchmarking" and "industry best practices" -- and why many companies
> in the role of X aren't all that forthcoming about publicizing all the
> details of their Y's, just in case Z's endeavours should put Z in
> competition with X (this always needs to be balanced with the many
> _advantages_ connected to publicizing some of those Y's, of course).

In the case of Google, there's way, way too much hidden for
people to reason based on what Google does. In this thread,
did you notice how far wrong people went about how Google's
stuff works?


> Such empirical support, while of course far from infallible (one will
> always have to take into consideration many details, and the devil is in
> the details), tends to perform vastly better in supporting decision
> making than purely abstract considerations bereft of any such empirical
> underpinnings.

Wikipedia is in PHP, Slashdot in Perl, Basecamp in Ruby. They
all rock, but more importantly, we can look under the hood. If
Wikipedia makes a weaker case for PHP than Google for Python,
it's largely because the whole story is never as neat as a
trickle of selective disclosures.


-- 
--Bryan


From david at boddie.org.uk  Wed Sep 26 18:53:04 2007
From: david at boddie.org.uk (David Boddie)
Date: Thu, 27 Sep 2007 00:53:04 +0200
Subject: Script to extract text from PDF files
Message-ID: <200709270053.05491.david@boddie.org.uk>

On Wed Sep 26 23:50:16 CEST 2007, byte8bits wrote:

> On Sep 26, 4:49 pm, Svenn Are Bjerkem <svenn.bjer... at googlemail.com>
> wrote:
> 
> > I have downloaded this package and installed it and found that the
> > text-extraction is more or less useless. Looking into the code and
> > comparing with the PDF spec show a very early implementation of text
> > extraction. Luckily it is possible to overwrite the textextraction
> > method in the base class without having to fiddle with the original
> > code. I tried to contact the developer to offer some help on
> > implementing text extraction, but he didn't answer my emails.

That's disappointing to hear, but it's understandable. I must have one
or two outstanding requests to add features to pdftools from a year ago.
I keep meaning to look into making the necessary changes, but it's not
something I'm looking forward to.

> Well, feel free to send any ideas or help to me! It seems simple... Do
> a binary read. Find 'stream' and 'endstream' sections.
> zlib.decompress() all the streams.

Assuming that they're FlateEncoded...

> Find BT and ET markers (Begin Text 
> & End Text) and finally locate the parens within those and string the
> text together.

Which works fine if the generator put in space characters. Otherwise,
it seems to me that you need to figure out where any spaces should go.

> This works great on 3 out of 10 PDF documents, but my 
> main issue seems to be the zlib compressed streams. Some of them don't
> seem to be FlateDecodeable (although they claim to be) or the header
> is somehow incorrect. But, once I get a good stream and decompress it,
> things are OK from that point on. Seriously, if you have ideas, please
> let me know. I'll be glad to share what I've got so far.

You need to take a good parser and work on a higher level text extraction
library.

> Not many people seem to be interested. I'll stop adding to this
> thread... I don't want to beat a dead horse. Anyone interested in
> helping, can contact me via emial.

On the contrary, lots of people are interested in this sort of thing:

http://phaseit.net/claird/comp.text.pdf/PDF_converters.html
http://sourceforge.net/projects/pdfplayground
http://www.adaptive-enterprises.com.au/~d/software/pdffile/
http://pybrary.net/pyPdf/
http://www.boddie.org.uk/david/Projects/Python/pdftools/

I discussed working with the author of pdfplayground, but things never
really got going.

I'd like to be part of a team working on a PDF library for Python, but my
views on software licensing mean that I'd prefer to use a strong copyleft
license rather than the permissive licenses found attached to most of the
above libraries.

David


From aleax at mac.com  Sun Sep  2 13:13:06 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 2 Sep 2007 10:13:06 -0700
Subject: Google spreadsheets
References: <1188564051.726895.288860@y42g2000hsy.googlegroups.com>
	<1188578994.210244.70800@i13g2000prf.googlegroups.com>
Message-ID: <1i3t5mo.lopt711vavlbwN%aleax@mac.com>

iapain <iapain at gmail.com> wrote:

> On Aug 31, 5:40 pm, Michele Simionato <michele.simion... at gmail.com>
> wrote:
> > I would like to upload a tab-separated file to a Google spreadsheet
> > from Python. Does anybody
> > have a recipe handy? TIA,
> >
> >     Michele Simionato
> 
> Probably its irrelevant to python. Use should see Google Spreadsheet
> API and use it in your python application.
> 
> http://code.google.com/apis/spreadsheets/

For Python-specific use, you probably want to get the Python version of
the GData client libraries,
<http://code.google.com/p/gdata-python-client/> ; an example of using it
with a spreadsheet is at
<http://gdata-python-client.googlecode.com/svn/trunk/samples/spreadsheet
s/spreadsheetExample.py> .


Alex


From mail at microcorp.co.za  Wed Sep 26 02:59:17 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 26 Sep 2007 08:59:17 +0200
Subject: Google and Python
References: <1190228512.627109.308910@n39g2000hsh.googlegroups.com><ufadnRC5BPZm6GzbnZ2dnUVZ_jOdnZ2d@comcast.com><1190231094.276099.136250@22g2000hsm.googlegroups.com><mailman.781.1190232163.2658.python-list@python.org><1190235678.019823.315850@o80g2000hse.googlegroups.com><mailman.887.1190402873.2658.python-list@python.org><7xejgr68pm.fsf@ruckus.brouhaha.com><slrnffetai.ijq.nick@irishsea.home.craig-wood.com><mailman.1031.1190705678.2658.python-list@python.org>
	<7xps07w5g3.fsf@ruckus.brouhaha.com>
Message-ID: <011301c8000d$0778ef00$03000080@hendrik>

"Paul Rubin" <http://lid> wrote:

> "Hendrik van Rooyen" <m..orp.co.za> writes:
> > What is the advantage of passing the open file rather than just the
> > fully qualified file name and having the other process open the
> > file itself?
>
> The idea is that the application is a web server.  The socket listener
> accepts connections and hands them off to other processes.  That is,
> the file descriptors are handles on network connections that were
> opened by the remote client, not disk files that can be opened
> locally.

Ok got it - so instead of starting a thread, as is current practice, you fork
a process (possibly on another machine) and "hand over" the client.
Can't you do this by passing the client's IP addy and the negotiated socket
on the clients machine?

Or is this where the heavy lifting comes in? - "spoofing" the original local IP
addy on the new server? - seems you would have to route to a local machine
based not on IP addy only, but on (IP,socket) tuples.  - This might work if
you have only one entry point to the local LAN, but would be harder to do
if there are two points of entry, and packets could hit from outside on either..

Might be easier to redirect the browser than to try to do this.

- Hendrik



From rschroev_nospam_ml at fastmail.fm  Sun Sep 16 11:46:09 2007
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Sun, 16 Sep 2007 15:46:09 GMT
Subject: Cannot formulate regex
In-Reply-To: <mailman.610.1189955906.2658.python-list@python.org>
References: <mailman.610.1189955906.2658.python-list@python.org>
Message-ID: <5dcHi.108404$Y95.5768344@phobos.telenet-ops.be>

Dotan Cohen schreef:
> I'd like to filter spam from a certain company. Here are examples of
> strings found in their spam:
> Mega Dik
> Mega D1k
> MegaDik
> Mega. Dik
> M eg ad ik
> M E _G_A_D_ IK
> M_E_G. ADI. K
> 
> I figured that this regex would match all but the second example, yet
> it matches none:
> |[^a-z]m[^a-z]e[^a-z]g[^a-z]a[^a-z]d[^a-z]i[^a-z]k[^a-z]|i
> 
> What would be the regex that matches "megadik" regardless of whatever
> characters are sprinkled throughout?

m[^a-z]*e[^a-z]*g[^a-z]*a[^a-z]*d[^a-z]*i[^a-z]*k

FYI Kodos (http://kodos.sourceforge.net/) can be very useful for 
developing, testing and debugging such regexes.

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From mrkafk at gmail.com  Sun Sep 30 15:16:30 2007
From: mrkafk at gmail.com (mrkafk at gmail.com)
Date: Sun, 30 Sep 2007 12:16:30 -0700
Subject: s.split() on multiple separators
In-Reply-To: <bkRLi.1723$hI7.1162@newssvr17.news.prodigy.net>
References: <1191160394.870241.171200@w3g2000hsg.googlegroups.com>
	<bkRLi.1723$hI7.1162@newssvr17.news.prodigy.net>
Message-ID: <1191179790.181227.323480@k79g2000hse.googlegroups.com>

> >  c=' abcde abc cba fdsa bcd '.split()
> >  dels='ce '
> >  for j in dels:
> >    cp=[]
> >    for i in xrange(0,len(c)-1):
>
> The "-1" looks like a bug; remember in Python 'stop' bounds
> are exclusive. The indexes of c are simply xrange(len(c)).

Yep. Just found it out, though this seems a bit counterintuitive to
me, even if it makes for more elegant code: I forgot about the high
stop bound.

>From my POV, if I want sequence from here to there, it should include
both here and there.

I do understand the consequences of making high bound exclusive, which
is more elegant code: xrange(len(c)). But it does seem a bit
illogical...

>      print re.split('[ce ]', c)

Yes, that does the job. Thanks.

Regards,
Marcin



From horpner at yahoo.com  Wed Sep 19 08:58:48 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Wed, 19 Sep 2007 12:58:48 GMT
Subject: super() doesn't get superclass
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<87abrkhtfp.fsf@mulj.homelinux.net>
	<871wcvzhvc.fsf@benfinney.id.au>
	<87odfz5dc3.fsf@mulj.homelinux.net>
Message-ID: <slrnff26i5.sg.horpner@FIAD06.norwich.edu>

On 2007-09-19, Hrvoje Niksic <hniksic at xemacs.org> wrote:
> Ben Finney <bignose+hates-spam at benfinney.id.au> writes:
>
>> Hrvoje Niksic <hniksic at xemacs.org> writes:
>>
>>> class X(Y):
>>>   def foo(self):
>>>     super(X, self).foo()
>>> 
>>> ...there is in fact no guarantee that super() calls a superclass of
>>> X.  However, it is certainly guaranteed that it will call a superclass
>>> of type(self).
>>
>> Not even that. It could call *any class in the inheritance
>> hierarchy*,
>
> The inheritance hierarchiy is populated by the various (direct
> and indirect) superclasses of type(self).
>
>> depending on how the MRO has resolved "next class". Even one that is
>> neither an ancestor nor a descendant of X.
>
> My point exactly.  superclass of X is not the same as
> superclass of type(self).  Super iterates over the latter,
> where you expect the former.

I can't blame a person for thinking that the call

  super(A, self)

is taking the superclass of A. A is perhaps too prominently
placed.

-- 
Neil Cerutti


From michele.simionato at gmail.com  Sun Sep  2 01:46:39 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Sun, 02 Sep 2007 05:46:39 -0000
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188709535.459572.22130@r34g2000hsd.googlegroups.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<4866bea60708291013g56b3dea9m7abcf5e4e4f6e29c@mail.gmail.com>
	<mailman.120.1188423362.28954.python-list@python.org>
	<K_bCi.721$7P7.506@newssvr19.news.prodigy.net>
	<1188709535.459572.22130@r34g2000hsd.googlegroups.com>
Message-ID: <1188711999.430235.97520@y42g2000hsy.googlegroups.com>

On Sep 2, 7:05 am, Russ <uymqlp... at sneakemail.com> wrote:
> Someone please correct me if I am wrong,
> but I think PEP adds only to the libraries.

You are wrong, PEPs also add to the core language. Why don't you give
a look
at the PEP parade on python.org?

        Michele Simionato



From deets at nospam.web.de  Mon Sep 10 15:34:56 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 10 Sep 2007 21:34:56 +0200
Subject: noob: reloading modified python file within Python Shell
In-Reply-To: <1189450434.578698.286760@o80g2000hse.googlegroups.com>
References: <1189450434.578698.286760@o80g2000hse.googlegroups.com>
Message-ID: <5klkjgF4du6mU1@mid.uni-berlin.de>

johnny schrieb:
> from people.models import *
> 
> Now I make changes to the models.py.  How do I reload this module in
> Python Shell?
> 

reload(module)

which works only with

import people.models

reload(people.models)

Which is better anyway, as the

from module import *

syntax will create local names that won't be changed by the reload.

Diez


From m.n.summerfield at googlemail.com  Wed Sep 26 10:24:17 2007
From: m.n.summerfield at googlemail.com (Mark Summerfield)
Date: Wed, 26 Sep 2007 14:24:17 -0000
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <1190815180.945099.248670@n39g2000hsh.googlegroups.com>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>
	<1190753722.026806.254530@d55g2000hsg.googlegroups.com>
	<1190756003.292096.71130@o80g2000hse.googlegroups.com>
	<1190789981.385466.37870@57g2000hsv.googlegroups.com>
	<Xns99B760A3F5859duncanbooth@127.0.0.1>
	<1190805297.182232.116830@50g2000hsm.googlegroups.com>
	<Xns99B7957CCE43Fduncanbooth@127.0.0.1>
	<1190815180.945099.248670@n39g2000hsh.googlegroups.com>
Message-ID: <1190816657.574437.80980@g4g2000hsf.googlegroups.com>

On 26 Sep, 14:59, Paul Hankin <paul.han... at gmail.com> wrote:
> On Sep 26, 2:46 pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
>
> > Paul Hankin <paul.han... at gmail.com> wrote:
> > > More flexibly, keep a set of inserted keys that haven't yet been
> > > included in the sorted list, and a set of deleted keys that haven't
> > > yet been removed from the sorted list. The cache is invalid if either
> > > of these sets are empty - and to make it valid you can choose what to
> > > do based on the sizes of the two sets (and the sorted list). For
> > > instance, if there's just been one insertion you're probably better
> > > doing an insertion rather than a full resort. Of course, there's a few
> > > nasty cases here but it's always possible to just throw away the
> > > sorted list and reconstruct it from the dict keys when things get too
> > > hairy (eg, the user deletes a key that's in the inserted-but-not-yet-
> > > sorted set).
>
> > Yes that sounds good. Did you mean 'The cache is invalid if either of
> > these sets is not empty'?
>
> Yes :)
>
> > If you delete a key which is in the inserted set you can simply delete
> > it from the inserted set.
>
> No, in case it was already in the sorted list before the insert. You
> have to remove it from the inserted set AND add it to the deleted set.
>
> --
> Paul Hankin

So should Duncan's

    def __removekey(self, key):
        if key in self.__addkeys:
            del self.__addkeys[key]
        else:
            self.__delkeys.add(key)

be changed to:

    def __removekey(self, key):
        if key in self.__addkeys:
            del self.__addkeys[key]
        self.__delkeys.add(key)

?

(BTW I'm happy to put up a new version on PyPI, but I'm v. conscious
of the fact that the key ideas and code have come from you and Duncan,
so if either of you would like to adopt it, I will gladly step aside.
I just want a sorteddict in Python, and I don't mind who does it:-)



From ricaraoz at gmail.com  Sat Sep  8 12:24:40 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Sat, 08 Sep 2007 13:24:40 -0300
Subject: creating really big lists
In-Reply-To: <1189267181.964313.302520@g4g2000hsf.googlegroups.com>
References: <874pi92tr4.fsf@mulj.homelinux.net>	<mailman.121.1189035929.2658.python-list@python.org>	<1189057626.943757.210420@d55g2000hsg.googlegroups.com>	<1189063849.118900.327540@22g2000hsm.googlegroups.com>	<1189192606.119578.100820@r34g2000hsd.googlegroups.com>	<mailman.263.1189215250.2658.python-list@python.org>
	<1189267181.964313.302520@g4g2000hsf.googlegroups.com>
Message-ID: <46E2CCC8.6040707@bigfoot.com>

Dr Mephesto wrote:
> On Sep 8, 3:33 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
>> En Fri, 07 Sep 2007 16:16:46 -0300, Dr Mephesto <dnh... at googlemail.com>
>> escribi?:
>>
>>> hey, that defaultdict thing looks pretty cool...
>>> whats the overhead like for using a dictionary in python?
>> Dictionaries are heavily optimized in Python. Access time is O(1),
>> adding/removing elements is amortized O(1) (that is, constant time unless
>> it has to grow/shrink some internal structures.)
>>
>> --
>> Gabriel Genellina
> 
> well, I want to (maybe) have a dictionary where the value is a list of
> 5 lists. And I want to add a LOT of data to these lists. 10?s of
> millions of pieces of data. Will this be a big problem? I can just try
> it out in practice on monday too :)
> 
> thanks
> 
> 

targetList = myDict[someKey]	# This takes normal dict access time
for j in xrange(5) :
    for i in xrange(50000000) :    # Add a LOT of data to targetList
        targetList[j].append(i)    # This takes normal list access time





From zzbbaadd at aol.com  Fri Sep 28 14:04:39 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Fri, 28 Sep 2007 11:04:39 -0700
Subject: Python 3.0 migration plans?
In-Reply-To: <mailman.1239.1191002287.2658.python-list@python.org>
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>
	<87641v4j38.fsf@benfinney.id.au>
	<1190949502.875203.57690@w3g2000hsg.googlegroups.com>
	<5m3p1dFbl98pU1@mid.uni-berlin.de>
	<1190968707.799398.232550@19g2000hsx.googlegroups.com>
	<5m4126FbgjabU1@mid.uni-berlin.de>
	<1190993122.979034.305060@50g2000hsm.googlegroups.com>
	<mailman.1236.1190995515.2658.python-list@python.org>
	<1190997769.002795.59450@57g2000hsv.googlegroups.com>
	<5m4qc2Fbbk19U1@mid.uni-berlin.de>
	<1191000394.828693.285210@k79g2000hse.googlegroups.com>
	<mailman.1239.1191002287.2658.python-list@python.org>
Message-ID: <1191002679.569709.16870@22g2000hsm.googlegroups.com>

On Sep 28, 10:57 am, Steve Holden <st... at holdenweb.com> wrote:
> TheFlyingDutchman wrote:
> > On Sep 28, 10:01 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> >> On Fri, 28 Sep 2007 09:42:49 -0700, TheFlyingDutchman wrote:
> >>> Which of the common languages have higher order functions and what is
> >>> the syntax?
> >> C, C++, Pascal, Perl, PHP, Ruby have them.  And of course the functional
> >> languages, most notably Lisp and Scheme as you asked for common languages.
>
> >> Don't know if C#'s delegates qualify.
>
> >> Ciao,
> >>         Marc 'BlackJack' Rintsch
>
> > What is the syntax of a higher order function in C, C++ and Pascal?
>
> This is like listening to a four-year-old torment its parents with
> incessant questions. Do you *have* to ask every question that pops into
> your mind?
>

In this case I asked it as part of the original question and it was
ignored. I have programmed in C and C++ and a little Pascal many years
ago. I don't remember anything about Higher Order Functions and would
like to see exactly how you do it and to verify the contention.




From hniksic at xemacs.org  Wed Sep 12 10:41:08 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Wed, 12 Sep 2007 16:41:08 +0200
Subject: Dynamically removing methods in new-style classes
References: <1189607295.676704.215210@r34g2000hsd.googlegroups.com>
Message-ID: <87r6l4gd4r.fsf@mulj.homelinux.net>

agupta0318 at gmail.com writes:

> I am trying unsuccessfully to remove some methods from an instance,

You can't remove the method from an instance because the method is
stored in its class.

> With the older python classes I could have done:
>     self.__class__.__dict__[''test1"] to achieve the desired result.

self.__class__.test1 still works, doesn't it?  Removing methods can be
achieved the same way:

>>> x=X()
>>> class X(object):
...  def blah(self): pass
...
>>> x=X()
>>> x.blah
<bound method X.blah of <__main__.X object at 0xb7d46bcc>>
>>> del type(x).blah
>>> x.blah
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'X' object has no attribute 'blah'


From xkenneth at gmail.com  Tue Sep  4 15:18:23 2007
From: xkenneth at gmail.com (xkenneth)
Date: Tue, 04 Sep 2007 19:18:23 -0000
Subject: Sort of an odd way to debug...
Message-ID: <1188933503.704007.285590@22g2000hsm.googlegroups.com>

All,

    Sorry for the vague topic, but I really didn't know how to
describe what I want to do. I'd like to almost do a traceback of my
code for debugging and I thought this would be a really cool way to do
it if possible.

What I'd like to do, is define a base class. This base class would
have a function, that gets called every time another function is
called (regardless of whether in the base class or a derived class),
and prints the doc string of each function whenever it's called. I'd
like to be able to do this without explicitly specifying the function
inside all of the other functions of a base class or derived class.

Here's what I think it would look like:

class Base:
     __init__(self,debug=False):
            if debug:
                self.debug = debug

     def functionThatAlwaysGetsCalled(self):
           print self.__docstring__

class Derived(Base):
    """This function prints something"""
    def printSometing(something)
         #ghost function get's called here
         print something

Output would be:
This function prints something
something

Thanks for any help!



From danfike at gmail.com  Thu Sep 20 10:45:51 2007
From: danfike at gmail.com (danfike at gmail.com)
Date: Thu, 20 Sep 2007 14:45:51 -0000
Subject: Building Python with VC8 on x64 Vista
Message-ID: <1190299551.573204.322440@57g2000hsv.googlegroups.com>

Hi all,

So I'm working on a C++ application that will eventually embed or
extend Python using Boost.Python, but I first need to get Python
compiled correctly for my platform. I've got a Windows Vista 64-bit
machine with a Core 2 processor, and I'm compiling with a VC8.

I downloaded the Python 2.5.1 source from python.org, and I opened the
Visual Studio solution file that was in the PCbuild8 directory. I
created a new x64 platform and managed to successfully compile the
'pythoncore' and 'python' projects (both in Debug and Release
configurations), resulting in working executables. (Aside: When
launched, the python console says "Python 2.5.1 [MSC v.1400 64 bit
(AMD64)] on win32" up top. Does that seem right?)

So, this program I'm writing with Boost.Python (that worked correctly
on x86 with home-built libraries) won't compile with these x64
libraries. I keep getting 'unresolved external symbols.' But, I'm
certain I'm linking in the library correctly. Here's a snippet from
the output (with /verbose:lib) when compiling:

1>Searching libraries
1>    <snip>
1>    Searching ..\..\..\3rdParty\boost_1_34_0\lib_x64\libboost_python-
vc80-mt-gy-1_34.lib:
1>    <snip>
1>    Searching ..\..\..\3rdParty\Python25\libs_x64\python25_d.lib:
1>Finished searching libraries
1>py_dyn_test.obj : error LNK2001: unresolved external symbol
_Py_NoneStruct
1>vector_py.obj : error LNK2001: unresolved external symbol
_Py_NoneStruct
1>volume_py.obj : error LNK2001: unresolved external symbol
_Py_NoneStruct
1>py_dyn_test.obj : error LNK2001: unresolved external symbol
_Py_RefTotal
1>vector_py.obj : error LNK2001: unresolved external symbol
_Py_RefTotal
1>volume_py.obj : error LNK2001: unresolved external symbol
_Py_RefTotal
1>volume_py.obj : error LNK2001: unresolved external symbol
PyExc_IndexError

If I switch to the Release configuration, I see fewer errors:

1>py_dyn_test.obj : error LNK2001: unresolved external symbol
_Py_NoneStruct
1>volume_py.obj : error LNK2001: unresolved external symbol
PyExc_IndexError

Note that none of my own code is Debug-specific. Also, the code in my
files is correct, because (as stated above), it worked fine for x86.

Though I don't know how useful it is, I did open the python libraries
in wordpad, and though most of the file wasn't legible, I did find
strings "Py_NoneStruct," "Py_RefTotal," and "PyExc_IndexError."


I suspect that I set up my "x64" platform configuration incorrectly,
or missed something. It's basically the same as the Win32
configuration, except with the /MACHINE:X64 flag instead of /
MACHINE:X86. One of the things I'm noticing just now, as I post this,
is that the preprocessor flag "WIN32" is still defined in the x64
configuration. Maybe if I change that to "WIN64," I'll have better
luck.

Any advice you have on what the "correct" way to do this is would be
appreciated.

-Dan



From software at ginstrom.com  Wed Sep 12 19:06:06 2007
From: software at ginstrom.com (Ryan Ginstrom)
Date: Thu, 13 Sep 2007 08:06:06 +0900
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <1189634093.644036.40780@r29g2000hsg.googlegroups.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com><13efndlln9n9659@corp.supernews.com>
	<1189634093.644036.40780@r29g2000hsg.googlegroups.com>
Message-ID: <053b01c7f591$7fe4e9c0$0203a8c0@MOUSE>

> On Behalf Of madzientist
> As a newbie to Python (and OOP), I would love to hear what 
> people think of Steven's suggestion below. Is there a reason 
> why classes would be useful for the OP's question ? If you 
> can point me to a brief online tutorial addressing this, I 
> would happily go there to read it too :)

In general, you should use classes when you need to maintain state. The
classic example is a BankAccount class, each instance of which maintains a
"balance" state.

When you don't need to maintain state, module-level functions are fine. In
fact, for testability/reliability, they're preferred, because when a method
twiddles some internal state, it's much harder to test. It's valuable to
have a function that always gives output x for input y, with no side
effects. That (to me) is the appeal of the functional programming style.

Regards,
Ryan Ginstrom



From grante at visi.com  Mon Sep  3 11:31:01 2007
From: grante at visi.com (Grant Edwards)
Date: Mon, 03 Sep 2007 15:31:01 -0000
Subject: Looking for Delaunay triangulation module...
References: <13dge9m2339ka68@corp.supernews.com>
	<mailman.300.1188775070.28954.python-list@python.org>
Message-ID: <13doa5l2r5dmg2b@corp.supernews.com>

On 2007-09-02, Robert Kern <robert.kern at gmail.com> wrote:

>> Can anybody point me to a Delaunay triangulation module (for
>> Win32)?  I'm currently using http://flub.stuffwillmade.org/delny/ 
>> under Linux, but I have been unable to find a build for
>> Windows. I don't have the tools (or skills) to build libqhull
>> and Pythion extensions on Win32).
>> 
>> I've also found the delaunay module in scipy's "sandbox".  I
>> could never get that module to work under Linux, and I can't
>> build it for Windows anyway.
>
> I'm working on it today. I'm going to break it out into a
> separate package. If you can remember what problems you had,
> I'd like to fix them. I'm clearing up a number of (really
> dumb) memory leaks.

I'm sorry I don't remember what the problems were. It was some
time ago (probably 14-16 months) when I was trying to use the
module. After spending a day or two on it, I switched to the
Delny module (which I had used in the past).

I do have Dlaunay triangulation working using VTK (which is
included in Enthought Python), but I haven't been able to
figure out how to extract the triangle list from the object
containing the resulting triangulation.  The object method that
people on the VTK mailing list tell me to call isn't available
in the Python binding.

-- 
Grant Edwards                   grante             Yow!  .. does your DRESSING
                                  at               ROOM have enough ASPARAGUS?
                               visi.com            


From python at cx.hu  Wed Sep  5 21:07:20 2007
From: python at cx.hu (Ferenczi Viktor)
Date: Thu, 6 Sep 2007 03:07:20 +0200
Subject: Any syntactic cleanup likely for Py3? And what about doc
	standards?
In-Reply-To: <fbnfad$hmr$2@sea.gmane.org>
References: <46DEFD2E.5050205@sbcglobal.net> <200709060128.03248.python@cx.hu>
	<fbnfad$hmr$2@sea.gmane.org>
Message-ID: <200709060307.21071.python@cx.hu>

> > AFAIK there is no such a thing as "intentionally ugly" in the Python
> > language. I've never read this sentence before in manuals, tutorials,
> > etc.
>
> Perhaps not, but ...
>
>   http://mail.python.org/pipermail/python-dev/2005-September/056846.html
>

WOW, thats true! :-D

(AFAIK these creations are rather complicated than just plain ugly.)

Thanks for your comment.

Viktor


From jstroud at mbi.ucla.edu  Fri Sep 28 23:13:17 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 28 Sep 2007 20:13:17 -0700
Subject: python 2.5 and 3gb switch
In-Reply-To: <fdkan6$ne0$1@aioe.org>
References: <fdkan6$ne0$1@aioe.org>
Message-ID: <fdkfqb$qr$1@daisy.noc.ucla.edu>

neil wrote:
> Hello group,
> 
> I have a question I hope someone knowledgeable here might assist me with :o)
> 
> I am working on a python exporter to get a scene out of Blender and into a 
> renderer called Indigo. I hope you at least have heard of open source 
> Blender..
> The scene is very large requiring me to use a 3gb switch enabled version of 
> Blender and of course boot into a 3gb XP.
> Unfortunately it seems that the limitation is now that python wont handle 
> the mission I pass to it.
> I am wondering if there is any build of python available that is 3gb aware? 
> ( if that is indeed the issue)
> I see python is not really there for 64 bit yet but most of the people 
> wanting to use this exporter will have 32 bit anyway.
> 
> Any assistance is appreciated
> regards
> Neil 
> 
> 

Please post the relevant code and error messages.

James


From bignose+hates-spam at benfinney.id.au  Sat Sep 29 19:58:03 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 30 Sep 2007 09:58:03 +1000
Subject: getopt with negative numbers?
References: <1190913250.198794.269530@k79g2000hse.googlegroups.com>
	<fdgpic$ssu$00$1@news.t-online.com>
	<1190915197.390247.313590@57g2000hsv.googlegroups.com>
	<fdgri5$ssu$00$2@news.t-online.com>
	<mailman.1182.1190917341.2658.python-list@python.org>
	<1190930134.780005.68510@22g2000hsm.googlegroups.com>
	<mailman.1196.1190937544.2658.python-list@python.org>
	<1190944143.521085.66910@g4g2000hsf.googlegroups.com>
	<871wcj4ib9.fsf@benfinney.id.au>
	<1190999036.588941.165610@g4g2000hsf.googlegroups.com>
	<GdednaFCqLj6oGDbnZ2dnUVZ_g6dnZ2d@comcast.com>
	<87odfm3021.fsf@benfinney.id.au>
	<1191021322.905791.21300@r29g2000hsg.googlegroups.com>
Message-ID: <87zlz510tw.fsf@benfinney.id.au>

Carl Banks <pavlovevidence at gmail.com> writes:

> On Sep 28, 6:19 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
> > Steven Bethard <steven.beth... at gmail.com> writes:
> > > A user shouldn't have to go out of their way to specify regular
> > > numbers on the command line, regardless of whether they're
> > > positive or negative.
> >
> > A user shouldn't have to go out of their way to know whether what
> > they type on a command line will be treated as an option or an
> > argument.
> 
> I guess typing
> ./program --help
> 
> is out of the question.

You're trying to have it both ways.

You're saying the user "shouldn't have to go out of their way" to type
arbitrary arguments on the command line. Then, in your next message,
you suggest they must *read the detailed command-line help* in order
to know whether they *can* type arbitrary command-line arguments.

Is "learn about how the program expects options and arguments" within
your definition of "go out of their way", or isn't it? If it's not,
then "shouldn't have to go out of their way" is *not* an argument in
favour of special-casing negative-numbers.

-- 
 \           "We spend the first twelve months of our children's lives |
  `\          teaching them to walk and talk and the next twelve years |
_o__)        telling them to sit down and shut up."  -- Phyllis Diller |
Ben Finney


From koutoo at hotmail.com  Tue Sep 18 14:21:01 2007
From: koutoo at hotmail.com (koutoo at hotmail.com)
Date: Tue, 18 Sep 2007 11:21:01 -0700
Subject: Newbie question
Message-ID: <1190139661.046103.45440@19g2000hsx.googlegroups.com>

If I have a file name: AVC1030708.14.  How do I strip out certain
characters from the file name?  I am so used to using MID, LEFT, and
RIGHT functions, that I have no idea how to do this in python?  I have
had trouble as well with most newbies on finding the help.  But I have
used the command line built in help, but with no luck.  Thanks.

Kou



From dieter at handshake.de  Fri Sep 28 14:18:45 2007
From: dieter at handshake.de (Dieter Maurer)
Date: Fri, 28 Sep 2007 20:18:45 +0200
Subject: [Zope] how do I test for the current item in an iteration
In-Reply-To: <005b01c801e5$600ad3c0$0200a8c0@design4>
References: <005b01c801e5$600ad3c0$0200a8c0@design4>
Message-ID: <18173.17797.719591.185734@gargle.gargle.HOWL>

kamal hamzat wrote at 2007-9-28 16:36 +0100:
>I have this error after i added the if statement
>
>Error Type: TypeError
>Error Value: mybrains.__cmp__(x,y) requires y to be a 'mybrains', not a 'int'
>
>
>for i in context.zCatNewsCurrent():
>     if i <= 5:  
>        print "%s: %s: %s" % (i.id, i.author, i.summary)

You are aware that you use "i" both as an integer ("i <= 5")
as well as a structure ("i.id", "i.author", ...).

Python is quite polymorph -- but there are some limits.

Andreas suggestion was good: "enumerate" may help you...



-- 
Dieter


From sjmachin at lexicon.net  Sat Sep 15 07:03:19 2007
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 15 Sep 2007 21:03:19 +1000
Subject: reading xls file from python
In-Reply-To: <mailman.565.1189828276.2658.python-list@python.org>
References: <21903009.66741189806994236.JavaMail.www@wwinf4602>
	<mailman.565.1189828276.2658.python-list@python.org>
Message-ID: <46EBBBF7.8060003@lexicon.net>

On 15/09/2007 1:50 PM, Gabriel Genellina wrote:
> En Fri, 14 Sep 2007 18:56:34 -0300, <hassen62 at voila.fr> escribi?:
> 
>> I have installed python 2.5 for windows in my pc, I have a file xls 
>> say "file.xls" in c:/python25. How I can read this files from Python. 
>> Many thanks in advance.
> 
> Try xlrd: http://www.python.org/pypi/xlrd

In the interests of even-handedness:
http://www.velocityreviews.com/forums/t352440-how-to-read-excel-files-in-python.html
covers other possibilities.

OT: A note for the OP: It is not a good idea to store your data files 
(example: file.xls) in the folder of some installed software (example: 
c:/python25). You may need to re-install the software and this may trash 
your data. Consider storing data files in folders whose names give some 
hint as to their contents.

HTH,
John


From stefan.behnel-n05pAM at web.de  Mon Sep 10 04:37:13 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Mon, 10 Sep 2007 10:37:13 +0200
Subject: Python syntax wart
In-Reply-To: <fc2uls$shh$2@lust.ihug.co.nz>
References: <fbvvil$7dj$1@lust.ihug.co.nz> <5khh6nF3i5nuU1@mid.uni-berlin.de>
	<46E390B7.2080808@web.de> <fc0518$aa2$5@lust.ihug.co.nz>
	<5ki2sdF3nr68U1@mid.individual.net> <fc2c52$i1l$3@lust.ihug.co.nz>
	<5kk8p0F3vfqqU1@mid.uni-berlin.de> <fc2t89$rik$4@lust.ihug.co.nz>
	<5kkcmvF3vfqqU3@mid.uni-berlin.de> <fc2uls$shh$2@lust.ihug.co.nz>
Message-ID: <46E50239.7050007@web.de>

Lawrence D'Oliveiro wrote:
> In message <5kkcmvF3vfqqU3 at mid.uni-berlin.de>, Marc 'BlackJack' Rintsch
> wrote:
>> And this is also easily written that way in Python if you don't insist on
>> the line break after the ``if`` or can live with backslashes.
> 
> Which is precisely the point.

This actually sounds somewhat pointless to me. If complex things don't fit
into one line, a good way to deal with it is not to insist on making them a
single statement.

Stefan


From bignose+hates-spam at benfinney.id.au  Thu Sep 20 00:52:50 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 20 Sep 2007 14:52:50 +1000
Subject: Mixin classes and single/multiple inheritance
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au>
	<46f0fba0$0$29605$426a34cc@news.free.fr>
	<1190199134.791808.267110@22g2000hsm.googlegroups.com>
	<mailman.778.1190225664.2658.python-list@python.org>
	<1190256493.827576.139470@r29g2000hsg.googlegroups.com>
	<877immvye0.fsf_-_@benfinney.id.au>
	<1190257864.945639.199230@k79g2000hse.googlegroups.com>
	<87y7f2uhpp.fsf@benfinney.id.au>
	<1190262607.684957.49610@57g2000hsv.googlegroups.com>
Message-ID: <87myviuee5.fsf@benfinney.id.au>

Michele Simionato <michele.simionato at gmail.com> writes:

> Since the language we have does have multiple inheritance, let's
> use it to implement mixins.
> ...
> So, multiple inheritance is giving us very little for the point of
> view of mixins; OTOH, multiple inheritance is giving us a lot of
> headaches for what concerns cooperative methods.

I may be obtuse, but the above statements seem to be professing
contradictory viewpoints.

Do you think multiple inheritance should or should not be used in
Python to do what mixins do?

> My point was that even if Python had been implemented without
> multiple inheritance, it would have been simple to implement mixins,
> or by copying the methods, or by dispatching with __getattr__.

Can you give a code example of how you think mixins should be
implemented in Python, assuming the absence of multiple inheritance?

-- 
 \          "The best way to get information on Usenet is not to ask a |
  `\            question, but to post the wrong information."  -- Aahz |
_o__)                                                                  |
Ben Finney


From korovev76 at gmail.com  Thu Sep 20 08:38:43 2007
From: korovev76 at gmail.com (korovev76 at gmail.com)
Date: Thu, 20 Sep 2007 05:38:43 -0700
Subject: I MEANT ONIX.... [it was Re: ONYX]
In-Reply-To: <46f25191$0$29574$426a34cc@news.free.fr>
References: <1190211769.268351.79500@d55g2000hsg.googlegroups.com>
	<46f1726f$0$15276$426a74cc@news.free.fr>
	<1190282489.824709.29050@r29g2000hsg.googlegroups.com>
	<1190283378.175422.73290@r29g2000hsg.googlegroups.com>
	<46f25191$0$29574$426a34cc@news.free.fr>
Message-ID: <1190291923.310128.156430@22g2000hsm.googlegroups.com>

On 20 Set, 12:55, Bruno Desthuilliers <bruno.
42.desthuilli... at wtf.websiteburo.oops.com> wrote:

>
> First question : do you *really* need a validating parser ?
>
that's what they told me ("they" being "da boss")... I mean: i have to
validate and to parse... i guess you can't do it at the same time, can
you?


> Second question : did you try to google for
>    "+Python +validating +XML +parser"

I've already googled it, and found pyRXP... but  I was looking for
someone/something already experienced with onix...




From mail at timgolden.me.uk  Mon Sep 10 11:11:07 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Mon, 10 Sep 2007 16:11:07 +0100
Subject: shared memory pointer
In-Reply-To: <1189436265.841415.234050@w3g2000hsg.googlegroups.com>
References: <1189436265.841415.234050@w3g2000hsg.googlegroups.com>
Message-ID: <46E55E8B.1040302@timgolden.me.uk>

Tim wrote:
> Hello Everyone,
> 
> I am getting shared memory in python using the following.
> 
> szName = c_char_p(name)
> hMapObject = windll.kernel32.CreateFileMappingA(INVALID_HANDLE_VALUE,
>             None, PAGE_READONLY, 0, TABLE_SHMEMSIZE, szName)
> if (hMapObject == 0):
>             print "OpenKey: Could not open name file mapping object"
>             raise WinError()
> 
> self.pData = windll.kernel32.MapViewOfFile(hMapObject,
>        FILE_MAP_ALL_ACCESS, 0, 0, TABLE_SHMEMSIZE)

Without answering your question directly, why not use
the stdlib mmap module, which does exactly this for
you behind the scenes?

Docs - http://docs.python.org/lib/module-mmap.html
Example - http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/413807

TJG


From lac at openend.se  Tue Sep 11 01:57:26 2007
From: lac at openend.se (Laura Creighton)
Date: Tue, 11 Sep 2007 07:57:26 +0200
Subject: [PyCON-Organizers] Next PyCon Organizers' Meeting Tuesday,
	11 September 
In-Reply-To: Message from "Douglas Napoleone" <doug@dougma.com> of "Mon,
	10 Sep 2007 22:34:01 EDT."
	<f08f4fbb0709101934r6c0d5a60i6ad2aaf266f63a98@mail.gmail.com> 
References: <46E5CFAB.8090802@python.org>
	<18149.64774.138831.976974@montanaro.dyndns.org>
	<f08f4fbb0709101934r6c0d5a60i6ad2aaf266f63a98@mail.gmail.com> 
Message-ID: <200709110557.l8B5vQbm011421@theraft.openend.se>


Does this mean that if you do not have a google account, and do not
want one, there is no way to join the meeting?  

Laura

In a message of Mon, 10 Sep 2007 22:34:01 EDT, "Douglas Napoleone" writes:
>I have found that jabber accounts no longer work, but google accounts
>do. I had a jabber account, but could never get it working in GAIM. My
>google account works fine.
>
>    -Doug
>
>
>On 9/10/07, skip at pobox.com <skip at pobox.com> wrote:
>>
>>     David> Connection details:
>>     David> http://wiki.python.org/moin/PyCon2008/OrganizersMeetingsConn
>ectionDetails
>>
>> Ah, now I remember.  GAIM complained:
>>
>>     400: Malformed Jabber ID
>>
>> GAIM recorded my Jabber ID as "skip.montanaro at jabber.org" which seems p
>retty
>> well-formed to me.
>>
>> Skip
>> _______________________________________________
>> Pycon-organizers mailing list
>> Pycon-organizers at python.org
>> http://mail.python.org/mailman/listinfo/pycon-organizers
>>
>_______________________________________________
>Pycon-organizers mailing list
>Pycon-organizers at python.org
>http://mail.python.org/mailman/listinfo/pycon-organizers


From bdesth.quelquechose at free.quelquepart.fr  Wed Sep 19 15:54:48 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 19 Sep 2007 21:54:48 +0200
Subject: lambda-funcs problem
In-Reply-To: <mailman.765.1190208935.2658.python-list@python.org>
References: <1190201984.062329.182460@k79g2000hse.googlegroups.com>	<06eb01c7fab5$0aa2bb50$0203a8c0@MOUSE>
	<mailman.765.1190208935.2658.python-list@python.org>
Message-ID: <46f17eaf$0$31727$426a34cc@news.free.fr>

St?phane Larouche a ?crit :
(snip)
> 
> funcs = [(lambda i: lambda x: x+i)(i) for i in xrange(10)]

A bit more complex than necessary... The canonical solution is
funcs = [lambda x, i=i: x+i for i in xrange(10)]




From llothar at web.de  Tue Sep  4 22:20:21 2007
From: llothar at web.de (llothar)
Date: Tue, 04 Sep 2007 19:20:21 -0700
Subject: Questions on FOX GUI and Python
In-Reply-To: <mailman.38.1188933800.2658.python-list@python.org>
References: <mailman.38.1188933800.2658.python-list@python.org>
Message-ID: <1188958821.873330.102310@d55g2000hsg.googlegroups.com>

On 5 Sep., 02:15, Kenneth McDonald <kenneth.m.mcdon... at sbcglobal.net>
wrote:
> Would anyone care to offer their opinions as to using Python with the
> FOX GUI toolkit? Ease of use, stability, power,
> speed, etc., all thoughts would be appreciated.


Pure theoretical question, as FXPy is not supported anymore, but i
bite:

Don't use FOX if you want to write a mainstream application.

I did it and i whish i could find the time to switch to another
toolkit.
Too many problems and to many useability bugs. The later ones are
getting
more serious for me.

Also development for the GUI part stalled and even before it was
OpenSource but never OpenCommunity.

And it is (if not patched) almost as ugly as the old TK.



From duncan.booth at invalid.invalid  Fri Sep 14 08:16:30 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 14 Sep 2007 12:16:30 GMT
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<87sl5j5r34.fsf@benfinney.id.au>
	<1189646281.569796.267940@d55g2000hsg.googlegroups.com>
	<87ir6f5mrq.fsf@benfinney.id.au> <m2ps0nj71c.fsf@koshka.cs.uu.nl>
Message-ID: <Xns99AB868E13C2Aduncanbooth@127.0.0.1>

Piet van Oostrum <piet at cs.uu.nl> wrote:

>>>>>> Ben Finney <bignose+hates-spam at benfinney.id.au> (BF) wrote:
> 
>>BF> The latter two statements are equivalent. The
>>'instance.method(args)' BF> syntax is just sugar for
>>'Class.method(instance, args)'. 
> 
> It is more than just syntactic sugar because the Class is derived from
> the instance at runtime. 

Other differences that mean it isn't just sugar:

you can save the bound method created by 'instance.method' but not with the 
expanded version.

The equivalence depends on the type of 'method', other expansions are 
possible: e.g. Class.method(Class, args) or Class.method(args) or invent 
your own.


From stefan.behnel-n05pAM at web.de  Wed Sep 19 04:13:24 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Wed, 19 Sep 2007 10:13:24 +0200
Subject: Extracting xml from html
In-Reply-To: <1190144020.294613.167800@57g2000hsv.googlegroups.com>
References: <1190061079.025479.129070@w3g2000hsg.googlegroups.com>
	<46EF769E.4080103@web.de>
	<1190144020.294613.167800@57g2000hsv.googlegroups.com>
Message-ID: <46F0DA24.5030000@web.de>

kyosohma at gmail.com wrote:
> Does this make sense? It works pretty well, but I don't really
> understand everything that I'm doing.
>
> def Parser(filename):

It's uncommon to give a function a capitalised name, unless it's a factory
function (which this isn't).


>     parser = etree.HTMLParser()
>     tree = etree.parse(r'path/to/nextpage.htm', parser)
>     xml_string = etree.tostring(tree)

What you do here is parse the HTML page and serialise it back into an XML
string. No need to do that - once it's a tree, you can work with it. lxml is a
highly integrated set of tools, no matter if you use it for XML or HTML.


>     events = ("recordnum", "primaryowner", "customeraddress")

You're not using this anywhere below, so I assume this is left-over code.


>     context = etree.iterparse(StringIO(xml_string), tag='')
>     for action, elem in context:
> 	tag = elem.tag
> 	if tag == 'primaryowner':
>             owner = elem.text
>         elif tag == 'customeraddress':
>             address = elem.text
>         else:
>             pass
> 
>     print 'Primary Owner: %s' % owner
>     print 'Address: %s' % address

Admittedly, iterparse() doesn't currently support HTML (although this might
become possible in lxml 2.0).

You could do this more easily in a couple of ways. One is to use XPath:

   print [el.text for el in tree.xpath("//primaryowner|//customeraddress")]

Note that this works directly on the tree that you retrieved right in the
third line of your code.

Another (and likely simpler) solution is to first find the "Row" element and
then start from that:

   row = tree.find("//Row")
   print row.findtext("primaryowner")
   print row.findtext("customeraddress")

See the lxml tutorial on this, as well as the documentation on XPath support
and tree iteration:

http://codespeak.net/lxml/xpathxslt.html#xpath
http://codespeak.net/lxml/api.html#iteration

Hope this helps,
Stefan


From cjw at sympatico.ca  Sun Sep 16 10:17:18 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Sun, 16 Sep 2007 10:17:18 -0400
Subject: We need PIGs :)
In-Reply-To: <5k9qpsF2mrncU3@mid.uni-berlin.de>
References: <mailman.131.1188450658.28954.python-list@python.org>	<46d74472$0$402$426a34cc@news.free.fr>
	<87hcm81dot.fsf@kip.sateh.com> <5k9qpsF2mrncU3@mid.uni-berlin.de>
Message-ID: <fcjdu0$2os$1@sea.gmane.org>

Marc 'BlackJack' Rintsch wrote:
> On Thu, 06 Sep 2007 09:00:02 +0200, Stefan Arentz wrote:
> 
>> What I find really frustrating in Python (combined with usually bad
>> documentation) is that many people have different styles. The most
>> frustratinng being getFoo() vs .foo, vs get_foo().
> 
> `getFoo()` is discouraged by PEP 8.  You don't have the choice between
> `.foo` and `.get_foo()` in Java because Java has no properties and people
> are trained to write getters and setters for everything.  I like that
> choice in Python because I can write shorter code that is not cluttered
> with very simple getters and setters.
> 
> Ciao,
> 	Marc 'BlackJack' Rintsch
Perhaps PEP 8 needs rethinking.  I prefer getFoo().
Similarly, I feel that the standard indent of 4 increases the 
likelihood of running off the end of a line.  An indent of 1 isn't 
quite clear visually, but 2 is.

Colin W.



From dotancohen at gmail.com  Tue Sep 11 18:19:38 2007
From: dotancohen at gmail.com (Dotan Cohen)
Date: Wed, 12 Sep 2007 01:19:38 +0300
Subject: Need a KDE app, where to find a coder?
In-Reply-To: <5kmq00F4d2c9U2@mid.uni-berlin.de>
References: <mailman.339.1189457224.2658.python-list@python.org>
	<5kmq00F4d2c9U2@mid.uni-berlin.de>
Message-ID: <880dece00709111519l66bb94d9v11f2a63bf611c18b@mail.gmail.com>

On 11/09/2007, Diez B. Roggisch <deets at nospam.web.de> wrote:
> Dotan Cohen schrieb:
> > I need an application, and I'd like it to be written in Python with QT
> > as I am a KDE user. I simply don't have the time to code it myself, as
> > I've been trying to find the time for half a year now.
> >
> > What are some reputable websites for finding Python coders? If anyone
> > on the list wants the job, this is what I need:
> >
> > I need a hierarchical list manager, similar to ListPro
> > (http://www.iliumsoft.com/site/lp/listpro.htm) which is the app that
> > I'm replacing. Specifically, I need the checkmark (boolen), item
> > (string), date, amount (int/100), and notes fields. As KDE is moving
> > to QT4 in December (with the release of KDE4) it would be best if the
> > app were coded with this in mind. As the application is for my own
> > personal use, I will try to maintain it with the little python that I
> > know, but I may need help along the way.
>
> There are a few places to ask - like guru.com.
>
> But you most probably will have to make a financial offer.
>
> Apart from that - do you know basket? It's integrated into kontact, and
> maybe does what you want.
>
> Diez

Thanks, I will look at guru.com. I have tried Basket, and found that
it is very difficult for me to use. It seems to cater to those who
find presentation more important that data structure. It does have
checkmark functions, but it is impossible to use in an efficient
manner.

Dotan Cohen

http://what-is-what.com
http://gibberish.co.il


From lasses_weil at klapptsowieso.net  Sun Sep 23 10:29:57 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Sun, 23 Sep 2007 16:29:57 +0200
Subject: building a GUI
In-Reply-To: <1190557293.266783.251480@y42g2000hsy.googlegroups.com>
References: <1190557293.266783.251480@y42g2000hsy.googlegroups.com>
Message-ID: <46f67866$0$4534$9b4e6d93@newsspool3.arcor-online.net>

yadin wrote:
> if i were up to make a GUI chich are the advantages of choosing python
> over matlab or java?
> 
This question is WAY to broad to give sane advice. You might want to 
state your context, objectives and restrictions are.

Since you brought up Matlab, I suspect you're going after a scientific 
problem, involving data entry and display. In that case I'd say you're 
pretty well off using Matlab, since, well, it specific purpose is just 
that (GUI-wise, I mean).

/W


From bj_666 at gmx.net  Sat Sep 29 02:27:07 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 29 Sep 2007 06:27:07 GMT
Subject: C Source Code Generator For Test Cases
References: <1191001738.456766.176050@n39g2000hsh.googlegroups.com>
	<5m51iuFbao07U1@mid.uni-berlin.de>
	<1191009469.736521.39210@k79g2000hse.googlegroups.com>
Message-ID: <5m69hrFbre38U1@mid.uni-berlin.de>

On Fri, 28 Sep 2007 12:57:49 -0700, gamename wrote:

>> How about using c-types to access your C-stuff to test, and use python + the
>> testcase-tables to invoke that?
>>
> 
> Sure, that's possible.  But the source code for tests (once all the
> parms are read)
> still needs to be generated.  Calling the lib from python or from C,
> there still
> needs to be a way to generate 100+ test routines. ;-)

Instead of reading the testcase tables and generating source for test
routines you simply can do the tests right away.

Ciao,
	Marc 'BlackJack' Rintsch


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Sep 26 05:41:00 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 26 Sep 2007 11:41:00 +0200
Subject: the address of list.append and list.append.__doc__
In-Reply-To: <1190796145.444227.191030@y42g2000hsy.googlegroups.com>
References: <1190775258.351819.24930@22g2000hsm.googlegroups.com>
	<mailman.1077.1190776788.2658.python-list@python.org>
	<1190780557.879816.13800@d55g2000hsg.googlegroups.com>
	<46fa102d$0$26322$426a74cc@news.free.fr>
	<1190796145.444227.191030@y42g2000hsy.googlegroups.com>
Message-ID: <46fa290d$0$21888$426a74cc@news.free.fr>

HYRY a ?crit :
>> There's no such thing as an "original method" - what's stored as an
>> attribute of the class is a plain function. FWIW, you can get at this
>> function quite easily - via the im_func attribute of the method.
> 
> I know about im_func, but I tried the im_func attribute of append and
> I get error: 'builtin_function_or_method' object has no attribute
> 'im_func'

Hmm, yes, of course. builtin C implementation here...

(snip use case)


From mensanator at aol.com  Thu Sep  6 19:39:44 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: Thu, 06 Sep 2007 16:39:44 -0700
Subject: Beginners Query - Simple counter problem
In-Reply-To: <mailman.170.1189104282.2658.python-list@python.org>
References: <WZidnbvgAJstpX3bRVnytgA@bt.com>
	<13e0g0id9rlmg71@corp.supernews.com>
	<1189102450.3376.17.camel@dot.uniqsys.com>
	<fbpgl2$qls$1@sea.gmane.org>
	<mailman.170.1189104282.2658.python-list@python.org>
Message-ID: <1189121984.384107.53410@22g2000hsm.googlegroups.com>

On Sep 6, 1:44 pm, Carsten Haese <cars... at uniqsys.com> wrote:
> On Thu, 2007-09-06 at 11:24 -0700, Ian Clark wrote:
> > Carsten Haese wrote:
> > > def d6(count):
> > >     return sum(random.randint(1, 6) for die in range(count))
>
> > My stab at it:
>
> >      >>> def roll(times=1, sides=6):
> >      ...     return random.randint(times, times*sides)
>
> That produces an entirely different probability distribution if times>1.
> Consider times=2, sides=6. Your example will produce every number
> between 2 and 12 uniformly with the same probability, 1 in 11. When
> rolling two six-sided dice, the results are not evenly distributed. E.g.
> the probability of getting a 2 is only 1 in 36, but the probability of
> getting a 7 is 1 in 6.
>
> --
> Carsten Haesehttp://informixdb.sourceforge.net

Why settle for a normal distribution?

import random

def devildice(dice):
  return sum([random.choice(die) for die in dice])

hist = {}

for n in xrange(10000):
  the_key = devildice([[1,2,3,10,11,12],[4,5,6,7,8,9]])
  if the_key in hist:
    hist[the_key] += 1
  else:
    hist[the_key] = 1

hkey = hist.keys()
m = max(hkey)
n = min(hkey)
histogram = [(i,hist.get(i,0)) for i in xrange(n,m+1)]
for h in histogram:
  print '%3d  %s' % (h[0],'*'*(h[1]/100))

##    5  **
##    6  *****
##    7  ********
##    8  ********
##    9  ********
##   10  *******
##   11  *****
##   12  **
##   13
##   14  **
##   15  ******
##   16  ********
##   17  ********
##   18  ********
##   19  ********
##   20  *****
##   21  **

They're called Devil Dice because the mean is 13 even
though you cannot roll a 13.



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Sep 13 08:21:44 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 13 Sep 2007 14:21:44 +0200
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
Message-ID: <5ksoaoF5am8cU1@mid.individual.net>

TheFlyingDutchman wrote:

> I am not talking about how the implementation of a C++ or Java
> compiler uses the this pointer/this reference internally. I am
> talking about how an author describes in English the "this"
> pointer/reference in their book on programming C++ or Java.

Ah, okay.
 
> I don't think you will find them saying that under the covers
> "this" was passed to the method (if in fact it is). They just say
> that it refers to the current object inside that object's method.

Mh, in my book, there is (quickly translated from german):

| Instance pointer (C++ only) 
| 
| The /this/ pointer is a feature of all non-static class methods.
| Every non static method is extended internally by a /this/
| argument. To that argument the compiler passes a pointer to the
| instance for which the method is being called.    
(Dirk Louis, C/C++-Kompendium, Markt&Technik-Verlag, 2000)

And that's only from the pointer chapter. The OOP chapters are more
detailed. And no, it's no book about compiler architecture, it's a
compendium.

> Here is a link to a tutorial where Sun is talking about the this
> reference:
> http://java.sun.com/docs/books/tutorial/java/javaOO/thiskey.html

That's a tutorial for getting you started, no reference
documentation or in-depth course.

> I am referring to C++. If someone is trying to learn the language,
> knowledge of the internal implemenation is counter-productive in
> my opinion because it distracts from the details they need to
> learn. 

In a language like C++ it is beneficial to know some inner
workings -- in the same way like it's beneficial to know some inner
workings of a computer if you want to use it.

BTW, C is not for nothing called "portable assembler" :)

> If they are experienced and want to learn about the internals to
> potentially help them code in the most blazingingly fast manner
> they ideally would just be reminded they are using C++ and not
> some slower byte-code executed language where it could possibly
> matter. ;) 

I don't know if it's just me, but I tend to understand stuff like
virtual methods much better if I know *why* they exist, and not
just *that* they do. That makes judging if and when I need them
easier.

Regards,


Bj?rn

-- 
BOFH excuse #192:

runaway cat on system.



From tjreedy at udel.edu  Wed Sep 19 20:08:59 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 19 Sep 2007 20:08:59 -0400
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com><dea92f560709021735l2c72d53ew94410fcb33b9b50b@mail.gmail.com><mailman.303.1188779927.28954.python-list@python.org><1190164166.378500.155990@o80g2000hse.googlegroups.com>
	<fcq352$u0a$1@sea.gmane.org>
Message-ID: <fcsdmk$gmf$1@sea.gmane.org>


"Terry Reedy" <tjreedy at udel.edu> wrote in message 
news:fcq352$u0a$1 at sea.gmane.org...
|
| "TheFlyingDutchman" <zzbbaadd at aol.com> wrote in message
| news:1190164166.378500.155990 at o80g2000hse.googlegroups.com...

| Since Guido wrote that, there have been put forth more ideas and interest
| and promises of efforts to remove or revise the GIL or do other things to
| make using multiple cores easier.  (The later being the point of the
| concern over GIL.)

A few days ago, an undergraduate posted on the dev list that he just 
started an independent study project on removing the GIL.  Maybe we'll get 
a report early next year.

Guido also said that he is willing to make changes to the CPython internals 
to aid multiproccessor usage [as long, presumably, as it does not cut speed 
in half].

|| How much faster/slower would Greg Stein's code be on today's
|| processors versus CPython running on the processors of the late
|| 1990's?
|
| Perhaps a bit faster, though processor speeds have not increased so much
| the last couple of years.

This assumes that comparing versions of 1.5 is still relevant.  As far as I 
know, his patch has not been maintained to apply against current Python. 
This tells me that no one to date really wants to dump the GIL at the cost 
of half Python's speed.  Of course not.  The point of dumping the GIL is to 
use multiprocessors to get more speed!  So with two cores and extra 
overhead, Stein-patched 1.5 would not even break even.

Quad (and more) cores are a different matter.  Hence, I think, the 
resurgence of interest.

||And if you decide to answer, please add a true/false response
|| to this statement - "CPython in the late 1990's ran too slow".
|
| False by late 1990's standards, True by today's standards ;-).

So now this question for you:  "CPython 2.5 runs too slow in 2007: true or 
false?"

If you answer false, then there is no need for GIL removal.
If you answer true, then cutting its speed for 90+% of people is bad.

| Most people are not currently bothered by the GIL and would not want its
| speed halved.

And another question: why should such people spend time they do not have to 
make Python worse for themselves?

Terry Jan Reedy






From n.anand.k at gmail.com  Tue Sep 25 06:30:05 2007
From: n.anand.k at gmail.com (Anand)
Date: Tue, 25 Sep 2007 03:30:05 -0700
Subject: Inserting an element into existing xml file
In-Reply-To: <46F8E0E2.3050602@web.de>
References: <1190712485.761290.136570@50g2000hsm.googlegroups.com>
	<46F8E0E2.3050602@web.de>
Message-ID: <1190716205.955284.220810@n39g2000hsh.googlegroups.com>

On Sep 25, 3:20 pm, Stefan Behnel <stefan.behnel-n05... at web.de> wrote:
> Anand wrote:
> > I'm new to Python. we are using python2.4.
>
> > I wanted to insert an element into an existing xml file. Can anyone
> > help me with this?
> > I've seen lxml and elementTree in python2.5 has some API's to insert
> > into existing xml file.
> > We cant use python 2.5 due to some limitations. So how can we do it in
> > 2.4?
>
> Install lxml and read the tutorial. It should be easy to grasp, as the API is
> very simple.
>
> http://codespeak.net/lxml/tutorial.htmlhttp://codespeak.net/lxml/tutorial.html#elements-are-lists
>
> It's compatible to ElementTree, which you can also install on Python 2.4 (it's
> what later became part of Python 2.5).
>
> Stefan


Hi Stefan,

First of all thanks for your reply.

I'm Afraid to say, I can't use lxml or elementTree as it requires many
legal approvals and there is high chances of not getting it through.
So Do you have any other method / idea just by using plain 2.4 to
accomplish the task

Cheers,
Anand



From istvan.albert at gmail.com  Thu Sep 27 11:42:11 2007
From: istvan.albert at gmail.com (Istvan Albert)
Date: Thu, 27 Sep 2007 15:42:11 -0000
Subject: setuptools without unexpected downloads
In-Reply-To: <87ejgmklep.fsf@benfinney.id.au>
References: <87ejgmklep.fsf@benfinney.id.au>
Message-ID: <1190907731.511106.42610@o80g2000hse.googlegroups.com>

On Sep 26, 2:09 am, Ben Finney <b... at benfinney.id.au> wrote:

> behaviour with a specific invocation of 'setup.py'. But how can I
> disallow this from within the 'setup.py' program, so my users don't
> have to be aware of this unexpected default behaviour?

I don't have the answer for this, but I can tell you that I myself
dislike the auto-download behavior and I wish it worked differently.

I've given up on setuptools/easy-install altogether. It is most
annoying to end up with half a dozen unexpected packages.

The default behavior should be to pop a question with a list of
packages that will be downloaded (and have a flag that bypasses this).
And of course being able to turn off this feature from setup.py.

i.












From bbxx789_05ss at yahoo.com  Mon Sep 17 09:21:32 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Mon, 17 Sep 2007 06:21:32 -0700
Subject: curses: x, y positioning
In-Reply-To: <m9qre35si8tujadfs6d0ukk4f9rhdgvuao@4ax.com>
References: <1189891633.622313.81850@r29g2000hsg.googlegroups.com>
	<m9qre35si8tujadfs6d0ukk4f9rhdgvuao@4ax.com>
Message-ID: <1190035292.415363.22320@50g2000hsm.googlegroups.com>

Hi,

Thanks for the response.

On Sep 16, 8:41 pm, Tim Roberts <t... at probo.com> wrote:
> Don't you want mvaddstr?
>


import curses

def my_program(screen):
    while True:
        ch = screen.getch()

        if ch == ord("q"):
            break
        if ch <= 255:
            screen.mvaddstr(30, 10, "*%s*" % chr(ch))
            screen.refresh()

curses.wrapper(my_program)

Traceback (most recent call last):
  File "2pythontest.py", line 13, in ?
    curses.wrapper(my_program)
  File "/Library/Frameworks/Python.framework/Versions/2.4//lib/
python2.4/curses/wrapper.py", line 44, in wrapper
    return func(stdscr, *args, **kwds)
  File "2pythontest.py", line 10, in my_program
    screen.mvaddstr(5, 5, "*%s*" % chr(ch))
AttributeError: mvaddstr


>
>(And remember that y comes first.)
> --

>>I can't seem to get any y, x coordinates to work with curses.

However, while changing things around, I discovered what is causing
the error:  the coordinate 30, 10 is off my screen.  When I change the
y, x coordinates to 5, 10, then the program executes as it should.

However, now I am having a problem trying to set the color of the text
that is output:

import curses

def my_program(screen):
    while True:
        ch = screen.getch()

        if ch == ord("q"):
            break
        if ch <= 255:
            output = "*%s*" % chr(ch)

            screen.addstr(5, 5, output, curses.COLOR_RED)
            screen.refresh()

curses.wrapper(my_program)


A strange thing is happening.  The integer value of the constant
curses.COLOR_RED is 1, and when I type in a character, 1 is getting
added to the character's ascii code.  For instance, if I type in an
'h', then an 'i' displays on the screen--and in white, not red.

I did some testing and has_colors() returns True, but I still can't
get the curses output to show up in red.  The tutorial:

Curses Programming with Python
A.M. Kuchling, Eric S. Raymond

says:

To use color, you must call the start_color() function soon after
calling initscr(), to initialize the default color set (the
curses.wrapper.wrapper() function does this automatically). Once
that's done, the has_colors() function returns TRUE if the terminal in
use can actually display color.


Another thing that is strange: that paragraph uses the syntax
curses.wrapper.wrapper().  And the docs say this:

--------
6.17 curses.wrapper -- Terminal handler for curses programs
New in version 1.6.

This module supplies one function, wrapper()...
--------

which implies that I should be using the syntax
curses.wrapper.wrapper() in my code.  But I get an error when I try
it:


Traceback (most recent call last):
  File "2pythontest.py", line 16, in ?
    curses.wrapper.wrapper(my_program)
AttributeError: 'function' object has no attribute 'wrapper'


I get the same error if add the import statement:

import curses.wrapper


I'm using an intel mac if that makes any difference.








From steve at holdenweb.com  Thu Sep 27 08:27:50 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 27 Sep 2007 08:27:50 -0400
Subject: URGENT REQUIREMENT FOR PYTHON DEVELOPERS
In-Reply-To: <20070926221048.CD77B1E4009@bag.python.org>
References: <20070926221048.CD77B1E4009@bag.python.org>
Message-ID: <46FBA1C6.4020308@holdenweb.com>

Krishna:

You might want to consider reading

   http://www.python.org/community/jobs/howto/

and submitting these jobs to the Job Board. It's free.

regards
  Steve

kishore at mindriver-it.com wrote:
> HI
> 
>  
> 
> THIS IS KRISHNA KISHORE FROM MindRiver. We have an Urgent requirement 
> for Python Developers who have 5-7 YRS of EXP.
> 
>  
> 
>  SKILLS  :PYTHON AND C/C++
> 
>  
> 
>    WORK LOCATION    :  BANGALROE
> 
>  
> 
>      PLEASE REVERT US WITH YOUR UPDATED PROFILES.
> 
>  
> 
> Thanks & Regards,
> 
> Kishore Seethanraju |Senior Associate-People Consulting| MindRiver 
> Information Technologies Pvt. Ltd.
> Suite# 512, 4th Floor and Suite # 104, Ground Floor ,Oxford Towers, 139, 
> Airport Road, Bangalore 560 008| Tel: +91.80.3052.1600 |Direct: 
> +91.80.3057.5799| Mobile: + 91.9901 96 1696 | Fax: +91.80.3057.5797| 
> Email: kishore at mindriver-it.com <mailto:skishore at mindriver-it.com> | Web 
> www.mindriver-it.com <http://www.mindriver-it.com/>
> 
> Information transmitted by this-mail is proprietary to MindRiver and / 
> or its Customers and is intended for use only by the individual or 
> entity to which it is addressed, and may contain information that is 
> privileged, confidential or exempt from disclosure under applicable law. 
> If you are not the intended recipient or it appears that this mail has 
> been forwarded to you without proper authority, you are notified that 
> any use or dissemination of this information in any manner is strictly 
> prohibited. In such cases, please notify us immediately at the above 
> mentioned telephone number or email to services at mindriver-it.com 
> <mailto:services at mindriver-it.com> and delete this mail from your 
> records. We believe this email to be virus free but do not warrant that 
> this is the case and we will not accept liability for any losses arising 
> from any virus being transmitted unintentionally by us'
> 
>  
> 


-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline


From steve at REMOVE-THIS-cybersource.com.au  Sun Sep 16 18:35:23 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sun, 16 Sep 2007 22:35:23 -0000
Subject: how to join array of integers?
References: <1189859762.563599.269270@g4g2000hsf.googlegroups.com>
	<a23effaf0709150551g19c611eqe1c912acf02306d3@mail.gmail.com>
	<mailman.577.1189864628.2658.python-list@python.org>
	<13eos6ihf2mjg4a@corp.supernews.com> <87lkb6o4bx.fsf@rudin.co.uk>
Message-ID: <13erbtbos7ld123@corp.supernews.com>

On Sun, 16 Sep 2007 19:25:22 +0100, Paul Rudin wrote:

>> The generator expression takes about twice as long to run, and in my
>> opinion it is no more readable. So what's the advantage?
> 
> If you do it with a decent size list they take more or less the same
> time. 

Did you try it, or are you guessing? What do you call a decent size?


> You'd presumably expect the generator to use less memory; which
> might be an advantage if you have large lists.

Unfortunately, Python doesn't make it as easy to measure memory use as it 
does to time snippets of code, so that's just a hypothetical.


> Isn't it odd that the generator isn't faster, since the comprehension
> presumably builds a list first and then iterates over it, whereas the
> generator doesn't need to make a list?

Who says it doesn't need to make a list? string.join() needs a sequence.


-- 
Steven.


From paul.hankin at gmail.com  Thu Sep 20 18:46:53 2007
From: paul.hankin at gmail.com (Paul Hankin)
Date: Thu, 20 Sep 2007 22:46:53 -0000
Subject: I could use some help making this Python code run faster using
	only Python code.
In-Reply-To: <1190325588.608625.259800@q3g2000prf.googlegroups.com>
References: <1190325588.608625.259800@q3g2000prf.googlegroups.com>
Message-ID: <1190328413.226577.206740@k79g2000hse.googlegroups.com>

On Sep 20, 10:59 pm, Python Maniac <raych... at hotmail.com> wrote:
> I am new to Python however I would like some feedback from those who
> know more about Python than I do at this time.
>
> def scrambleLine(line):
>     s = ''
>     for c in line:
>         s += chr(ord(c) | 0x80)
>     return s
>
> def descrambleLine(line):
>     s = ''
>     for c in line:
>         s += chr(ord(c) & 0x7f)
>     return s
> ...

Well, scrambleLine will remove line-endings, so when you're
descrambling
you'll be processing the entire file at once. This is particularly bad
because of the way your functions work, adding a character at a time
to
s.

Probably your easiest bet is to iterate over the file using read(N)
for some small N rather than doing a line at a time. Something like:

process_bytes = (descrambleLine, scrambleLine)[action]
while 1:
    r = f.read(16)
    if not r: break
    ff.write(process_bytes(r))

In general, rather than building strings by starting with an empty
string and repeatedly adding to it, you should use ''.join(...)

For instance...
def descrambleLine(line):
  return ''.join(chr(ord(c) & 0x7f) for c in line)

def scrambleLine(line):
  return ''.join(chr(ord(c) | 0x80) for c in line)

It's less code, more readable and faster!

--
Paul Hankin



From sjmachin at lexicon.net  Sat Sep 15 09:07:47 2007
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 15 Sep 2007 06:07:47 -0700
Subject: regexp search on infinite string?
In-Reply-To: <1189860966.073168.33840@50g2000hsm.googlegroups.com>
References: <1189802940.518794.129130@r29g2000hsg.googlegroups.com>
	<1189860966.073168.33840@50g2000hsm.googlegroups.com>
Message-ID: <1189861667.962508.76850@57g2000hsv.googlegroups.com>

On Sep 15, 10:56 pm, Paddy <paddy3... at googlemail.com> wrote:
> On Sep 14, 9:49 pm, Paddy <paddy3... at googlemail.com> wrote:
>
> > Lets say i have a generator running that generates successive
> > characters of a 'string'>From what I know, if I want to do a regexp search for a pattern of
>
> > characters then I would have to 'freeze' the generator  and pass the
> > characters so far to re.search.
> > It is expensive to create successive characters, but caching could be
> > used for past characters. is it possible to wrap the generator in a
> > class, possibly inheriting from string, that would allow the regexp
> > searching of the string but without terminating the generator? In
> > other words duck typing for the usual string object needed by
> > re.search?
>
> > - Paddy.
>
> There seems to be no way of breaking into the re library accessing
> characters from the string:
>
> >>> class S(str):
>
> ...     def __getitem__(self, *a):
> ...             print "getitem:",a
> ...             return str.__getitem__(self, *a)
> ...     def __get__(self, *a):
> ...             print "get:",a
> ...             return str.__get__(self, *a)
> ...>>> s = S('sdasd')
> >>> m = re.search('as', s); m.span()
> (2, 4)
> >>> m = sre.search('as', s); m.span()
> (2, 4)
> >>> class A(array.array):
>
> ...     def __getitem__(self, *a):
> ...             print "getitem:",a
> ...             return str.__getitem__(self, *a)
> ...     def __get__(self, *a):
> ...             print "get:",a
> ...             return str.__get__(self, *a)
> ...
>
> >>> s = A('c','sdasd')
> >>> m = re.search('as', s); m.span()
> (2, 4)
> >>> m = sre.search('as', s); m.span()
> (2, 4)
>
> - Paddy.

That would no doubt be because it either copies the input [we hope
not] or more likely because it hands off the grunt work to a C module
(_sre).

Why do you want to "break into" it, anyway?



From JohnRoth1 at jhrothjr.com  Sat Sep 29 12:29:37 2007
From: JohnRoth1 at jhrothjr.com (John Roth)
Date: Sat, 29 Sep 2007 09:29:37 -0700
Subject: Python 3.0 migration plans?
In-Reply-To: <mailman.1195.1190936289.2658.python-list@python.org>
References: <mailman.1195.1190936289.2658.python-list@python.org>
Message-ID: <1191083377.191358.303320@d55g2000hsg.googlegroups.com>

On Sep 27, 5:37 pm, Steve Holden <st... at holdenweb.com> wrote:
> I wondered if a straw poll could get some idea of readers' thoughts
> about when they will be migrating to 3.0 on, so I used the new widget on
> Blogger to add a poll for that.
>
> I'd appreciate if if you would go to
>
>    http://holdenweb.blogspot.com/
>
> and register your vote on your intended migration timescale.
>
> Thanks!
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
>
> Sorry, the dog ate my .sigline

I was thinking of starting work on converting Python FIT to 3.0, and
then they posted PEP 3137. I think it's a real good idea, but it shows
that 3.0a1 isn't ready for a conversion effort.

http://www.python.org/dev/peps/pep-3137/

I'll look at it again in a year or so.

John Roth



From garyjefferson123 at yahoo.com  Thu Sep 20 02:08:55 2007
From: garyjefferson123 at yahoo.com (Gary Jefferson)
Date: Thu, 20 Sep 2007 06:08:55 -0000
Subject: distutils, extensions, and missing headers
Message-ID: <1190268535.052437.226240@v23g2000prn.googlegroups.com>

My setup.py (with extension) seems to work great for build and
install, but for bdist_rpm, compilation of the extension fails because
some of the headers needed to build the extension aren't in the bdist
tarball.

I've tried adding a 'depends=[]' to the Extension definition with
these header files present, but they still don't get put in the
tarball.

What's the key to getting headers or other [non-python] files included
in a bdist?

Thanks,
Gary



From khemkaamit at gmail.com  Sat Sep  8 04:00:28 2007
From: khemkaamit at gmail.com (Amit Khemka)
Date: Sat, 8 Sep 2007 13:30:28 +0530
Subject: Python and Cron
In-Reply-To: <a9f39a410709071214h69a22fbcnbc40fa3ecd7ac96c@mail.gmail.com>
References: <a9f39a410709071214h69a22fbcnbc40fa3ecd7ac96c@mail.gmail.com>
Message-ID: <1360b7230709080100o5a6ff416oab913834785cb838@mail.gmail.com>

On 9/8/07, Greg Lindstrom <gslindstrom at gmail.com> wrote:
<snip>
> # run client pricing at 0215 (p) Monday-Friday
> 15 2 * * 1-5 cd /m01/edith/src && /usr/bin/python /m01/edith/src/driver.py
> --paid-date yesterday --jobname professional >>
> /m01/edith/stdout/ecomppo.stdout 2&>1

"2&>1",  Is that a typo ? It should be "2>&1" .

Are you *sure* that the cron job is running ?

cheers,

-- 
----
Amit Khemka
website: www.onyomo.com
wap-site: www.owap.in


From freesoftwareweb at gmail.com  Sun Sep 23 15:44:18 2007
From: freesoftwareweb at gmail.com (freesoftwareweb at gmail.com)
Date: Sun, 23 Sep 2007 19:44:18 -0000
Subject: Latest software downloads!!!!!
Message-ID: <1190576658.923018.297350@k79g2000hse.googlegroups.com>

http://freesoftwareupgrades.blogspot.com/



From knjaz0 at gmail.com  Tue Sep 11 07:58:52 2007
From: knjaz0 at gmail.com (knjaz)
Date: Tue, 11 Sep 2007 04:58:52 -0700
Subject: Car-ac-systems
Message-ID: <1189511932.371621.112970@o80g2000hse.googlegroups.com>

Here you can find everything you need to know about car air
conditioning

http://car-ac-systems.blogspot.com/



From jkrukoff at ltgc.com  Tue Sep  4 12:27:47 2007
From: jkrukoff at ltgc.com (John Krukoff)
Date: Tue, 4 Sep 2007 10:27:47 -0600
Subject: GC performance with lists
In-Reply-To: <1188914819.723858.25000@d55g2000hsg.googlegroups.com>
Message-ID: <002101c7ef10$8ca160d0$0201a8c0@naomi>

> -----Original Message-----
> From: python-list-bounces+jkrukoff=ltgc.com at python.org [mailto:python-
> list-bounces+jkrukoff=ltgc.com at python.org] On Behalf Of jonas at mit.edu
> Sent: Tuesday, September 04, 2007 8:07 AM
> To: python-list at python.org
> Subject: GC performance with lists
> 
> While working on some python wrapping, I've run into some problems
> where the GC seems to take an unreasonable amount of time to run. The
> code below is a demonstration:
> 
> import gc
> #gc.disable()
> 
> data = []
> for i in xrange(100000):
> 
>     shortdata = []
>     for j in range(57):
>         mytuple = (j, i+1, i+2, i+3, i+4, i+5, i+6)
>         shortdata.append(mytuple)
>     data.extend(shortdata)
> 
> print len(data)
> 
> with gc disabled (the second line) the code runs in 15 seconds, with
> it enabled it runs in 2:15, or ~9x slower. I expected some gc
> overhead, but not an order of magnitude! Am I doing something
> obviously wrong in the above code?
> 
> Thanks,
>      ...Eric
> 
> --
> http://mail.python.org/mailman/listinfo/python-list

The only real optimization I see for this is moving the common
subexpressions (i+1, i+2, etc...) out of the loop as previous poster
suggested. 

Something that looks like this, maybe:
data = []
append = data.append
for i in xrange( 100000 ):
	shortdata = ( i+1, i+2, i+3, i+4, i+5, i+6 )
	for j in range( 57 ):
		append( ( j, ) + shortdata )

That'll help a little, I just checked the docs to be sure, and collection is
triggered by the number of allocations - number of deallocations going over
a certain threshold (700 by default). 

You do realize just what a massive data structure you're building here, too,
right? On my box, building this consumes about 750Mb of memory. You're doing
a massive number of allocations to create it, too, approximately 40 million.
So, if the gc gets called every 700 allocations, you're spending a lot of
time in the gc, and it's got a huge amount of memory it's sweeping.

It sounds to me like you're triggering worst case behaviour for the gc, and
should either change the threshold values, or simply disable the gc before
the loop and reenable it after. A single gc run at the end probably won't be
so bad as all the intermediate ones, though my box has pretty severe issues
doing anything after creating this data structure as it starts swapping to
disc.

My architechtural suggestion would be to refactor this as an iterator if at
all possible, so as to avoid the massive allocation burden.

---------
John Krukoff
helot at comcast.net



From zzbbaadd at aol.com  Fri Sep 28 16:00:08 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Fri, 28 Sep 2007 13:00:08 -0700
Subject: Python 3.0 migration plans?
In-Reply-To: <1191008702.579795.141180@r29g2000hsg.googlegroups.com>
References: <1191002679.569709.16870@22g2000hsm.googlegroups.com>
	<mailman.1242.1191003389.2658.python-list@python.org>
	<1191005906.556751.261940@22g2000hsm.googlegroups.com>
	<5m51l4Fbao07U2@mid.uni-berlin.de>
	<1191007754.740566.137510@n39g2000hsh.googlegroups.com>
	<1191008702.579795.141180@r29g2000hsg.googlegroups.com>
Message-ID: <1191009608.985644.271160@50g2000hsm.googlegroups.com>

On Sep 28, 12:45 pm, George Sakkis <george.sak... at gmail.com> wrote:
> On Sep 28, 3:29 pm, TheFlyingDutchman <zzbba... at aol.com> wrote:
>
> > One issue I have with this group and that I encountered many years ago
> > in the Perl group is that there is no separate group
> > comp.lang.python.beginner where you can ask questions without getting
> > hit with RTFM! and the like.
>
> Which shows once again that you're trying to break the world record of
> being wrong in as many sentences as possible:
>
>    http://mail.python.org/mailman/listinfo/tutor
>
> You would do yourself (and others) a favor by migrating there for a
> few weeks or months.
>
> George

Being in a land where every nit can be picked, I am surprised that you
offered up a mailing list when I was asking for a newsgroup.



From martin at v.loewis.de  Wed Sep 12 16:29:07 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 12 Sep 2007 22:29:07 +0200
Subject: pwdmodule.c
In-Reply-To: <1189622437.459458.129390@57g2000hsv.googlegroups.com>
References: <1189622437.459458.129390@57g2000hsv.googlegroups.com>
Message-ID: <46E84C13.3000409@v.loewis.de>

> Is pwdmodule.c supposed to be excluded for windows compilation?

Yes, it is - it gives access to /etc/passwd.

See PCbuild/*.vcproj for what files get compiled on Windows.

Regards,
Martin


From gagsl-py2 at yahoo.com.ar  Sat Sep 22 01:16:56 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 22 Sep 2007 02:16:56 -0300
Subject: Newbie completely confused
References: <4437CC27-104E-4EE9-80DB-DCF36213B44F@gmail.com>
Message-ID: <op.ty1iaiw2x6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 21 Sep 2007 13:34:40 -0300, Jeroen Hegeman  
<jeroen.hegeman at gmail.com> escribi?:

> So the first time around the file gets read in in ~0.1 seconds, the
> second time around it needs almost four seconds! As far as I can see
> this is related to 'something in memory being copied around' since if
> I replace the 'alternative 1' by the 'alternative 2', basically
> making sure that my classes are not used, reading time the second
> time around drops back to normal (= roughly what it is the first pass).

> class ModerateClass:
>      def __init__(self):
>          return
>      def __del__(self):
>          pass
>          return
>
> class HugeClass:
>      def __init__(self,line):
>          self.clear()
>          self.input(line)
>          return
>      def __del__(self):
>          del self.B4v
>          return
>      def clear(self):
>          self.long_classes = {}
>          self.B4v={}
>          return

Don't use __del__ unless it's absolutely necesary. ModerateClass.__del__  
does nothing, but its mere existence does not allow the garbage collector  
to work efficiently. If you explicitey call clear() from HugeClass, you  
can avoid using __del__ too. And if B4v is not involved in cycles,  
clearing it is not even necesary.
(BTW, all those return statements are redundant and useless)


-- 
Gabriel Genellina



From richie at entrian.com  Thu Sep 13 11:03:48 2007
From: richie at entrian.com (Richie Hindle)
Date: Thu, 13 Sep 2007 16:03:48 +0100
Subject: Coming from Perl
In-Reply-To: <d9cGi.356$372.131@read2.cgocable.net>
References: <Cv%Fi.198$372.59@read2.cgocable.net>	<1189644803.816375.269950@y42g2000hsy.googlegroups.com>	<b46Gi.221$372.100@read2.cgocable.net>	<87y7fa52ru.fsf@benfinney.id.au>	<jWaGi.224$372.55@read2.cgocable.net>
	<mailman.485.1189691416.2658.python-list@python.org>
	<d9cGi.356$372.131@read2.cgocable.net>
Message-ID: <i6kie3trqn39afpmqdj51d1iaj3ckmfae4@4ax.com>


> [Amer]
> #!/usr/bin/python
> [...] On my home PC [...]
> [Thu Sep 13 04:16:03 2007] [error] [client 0.0.0.0] (OS 2)The system 
> cannot find the file specified.

That's because on your home PC Python is somewhere like
C:\Python25\python.exe, not /usr/bin/python.

Are you sure /usr/bin/python is correct for your hosting environment?

-- 
Richie Hindle
richie at entrian.com


From jstroud at mbi.ucla.edu  Fri Sep 14 00:19:07 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 13 Sep 2007 21:19:07 -0700
Subject: How to Start
In-Reply-To: <MPG.215360ba6684d43b9896d5@news.cox.net>
References: <MPG.215360ba6684d43b9896d5@news.cox.net>
Message-ID: <fcd1nb$8cu$1@daisy.noc.ucla.edu>

Michael R. Copeland wrote:
>    Yes, I could fire up the interactive mode and play with some 
> statements...but I consider that sort of thing for programming neophytes 
> or experimenting with specific issues. 

The interactive interpreter is *the fastest* way to learn, expert, 
novice, or somewhere in-between. Let me do a quick count of the number 
of instances I have running just on the machine I'm at right now...ok, 
only 1, but that's because I just switched over to a Mac at work and it 
doesn't support multiple desktops--yet. I basically test just about 
every idea I have in the interactive interpreter before I lay it down in 
a text file.

First, I want to develop a
> simple Windows application, and because of the plethora of "stuff" the 
> Python world offers, I don't know where to begin.

Pseudocode (~ python code).

>    For example, what basic, easy-to-use interface might I start with to 
> build a simple text file parsing and analysis program?  That is, I'd 
> like to start with a simple Windows shell that prompts for a file name, 
> processes it, and then displays some result.

#! /usr/bin/env python

def main():
   file_name = prompt_for_name()
   result = process(file_name)
   display(result)

def prompt_for_name():
   [fill in here]

[etc.]

>    I am certainly impressed with the apparent experience and openness of 
> the regular players here, but the discussions here (and in 
> c.l.p.announce) truly presume knowledge and experience with Python I 
> don't yet have.  Yes, for even a very experienced programmer, entering 
> the Python world is very daunting - but I want to get started.
>    Please advise.  TIA

Here's your recipe:

   1. begin coding until you hit a wall
   2. read official tutorial until you figure out a solution
   3. experiment in interactive interpreter
   4. goto 1.

I know this sounds obvious, but its the best way to jumpstart.

James


From garyjefferson123 at yahoo.com  Fri Sep 21 10:50:24 2007
From: garyjefferson123 at yahoo.com (Gary Jefferson)
Date: Fri, 21 Sep 2007 14:50:24 -0000
Subject: calling extension's autoconf/make from distutils
In-Reply-To: <1190349834.894931.128050@q3g2000prf.googlegroups.com>
References: <1190349834.894931.128050@q3g2000prf.googlegroups.com>
Message-ID: <1190386224.536371.136640@q3g2000prf.googlegroups.com>

On Sep 20, 10:43 pm, Gary Jefferson <garyjefferson... at yahoo.com>
wrote:
> I've got a python extension that comes with its own standard autoconf/
> automake system, and I can "python setup.py build" just fine with it
> as long as I have previously done "./configure" in that directory.
>
> However, 'python setup.py bdist_rpm' can't hope to have done './
> configure' first, as it untars and tries to build the extension there.
>
> Is there a hook for bdist_rpm (and friends) that will allow me to
> insert a './configure' in the build process, sometime before it tries
> to build the extension?
>
> Thanks,
> Gary


I ended up simply subclassing 'Extension' and having it os.system('./
configure') before proceeding.

This isn't perfect, as it does the './configure' everytime, but it
works.

Gary



From bborcic at gmail.com  Mon Sep  3 13:30:45 2007
From: bborcic at gmail.com (Boris Borcic)
Date: Mon, 03 Sep 2007 19:30:45 +0200
Subject: So what exactly is a complex number?
In-Reply-To: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
Message-ID: <fbhge5$fno$1@sea.gmane.org>

Lamonte Harris wrote:
> Like in math where you put letters that represent numbers for place 
> holders to try to find the answer type complex numbers?
> 

Not quite. Relating them to (plane) trigonometry is much closer to the mark. 
Complex numbers are like a subclass of real numbers that elegantly extends the 
usual arithmetic operations to provide access to trigonometric functions and 
related goodies. This then allows you to think of trigonometric problems as 
simple arithmetic problems.




From jurian at oco.co.za  Wed Sep  5 16:55:13 2007
From: jurian at oco.co.za (Jurian Botha)
Date: Wed, 5 Sep 2007 13:55:13 -0700 (PDT)
Subject: SSL Issue
Message-ID: <12510772.post@talk.nabble.com>


Sorry if this is a real dumb question, but I'm totally stumped.

I'm trying to connect to a https url in order to do some xml-rpc method
calls, but I'm getting the following error:

Error Type: sslerror
Error Value: (6, 'TLS/SSL connection has been closed')

What could be causing this error, any clues would be greatly appreciated.

Thanks
-- 
View this message in context: http://www.nabble.com/SSL-Issue-tf4388062.html#a12510772
Sent from the Python - python-list mailing list archive at Nabble.com.



From http  Fri Sep  7 11:47:58 2007
From: http (Paul Rubin)
Date: 07 Sep 2007 08:47:58 -0700
Subject: Generating a unique identifier
References: <13e2fgbbpsatm39@corp.supernews.com>
	<7x3axq7a8a.fsf@ruckus.brouhaha.com>
Message-ID: <7xodgejx3l.fsf@ruckus.brouhaha.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
> def unique_id():
>    return os.urandom(10).encode('hex')

Sorry, make that 32 or 40 instead of 10, if the number of id's is large,
to make birthday collisions unlikely.

If you don't want the id's to be that large, you can implement a
Feistel cipher using md5 or sha as the round function pretty
straightforwardly, then just feed successive integers through it.
That also guarantees uniqueness, at least within one run of the
program.  I have some sample code around for that, let me know if you
need it.


From jgardner.jonathangardner.net at gmail.com  Tue Sep  4 15:47:11 2007
From: jgardner.jonathangardner.net at gmail.com (Jonathan Gardner)
Date: Tue, 04 Sep 2007 19:47:11 -0000
Subject: REGULAR EXPRESSION
In-Reply-To: <1188912767.360967.306050@y42g2000hsy.googlegroups.com>
References: <1188912767.360967.306050@y42g2000hsy.googlegroups.com>
Message-ID: <1188935231.472813.32530@k79g2000hse.googlegroups.com>

On Sep 4, 6:32 am, AniNair <anitn... at gmail.com> wrote:
> hi.. I am trying to match '+ %&/-' etc using regular expression  in
> expressions like 879+34343. I tried \W+   but it matches only in the
> beginning of the string Plz help Thanking you in advance...

You may want to read the page describing the regex syntax a little
closer. http://docs.python.org/lib/re-syntax.html

\W would match anything but \w. That is, it would match spaces and
tabs as well as the weird characters. I don't think that's what you
want.

Also, don't forget to use raw strings. r"\W+" is preferred over "\W+".



From michele.simionato at gmail.com  Mon Sep 24 11:44:40 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Mon, 24 Sep 2007 15:44:40 -0000
Subject: Can a base class know if a method has been overridden?
In-Reply-To: <1190647436.423328.217670@w3g2000hsg.googlegroups.com>
References: <1190647436.423328.217670@w3g2000hsg.googlegroups.com>
Message-ID: <1190648680.658816.150430@r29g2000hsg.googlegroups.com>

On Sep 24, 5:23 pm, Ratko <rjago... at gmail.com> wrote:
> Hi all,
>
> I was wondering if something like this is possible. Can a base class
> somehow know if a certain method has been overridden by the subclass?
> I appreciate any ideas.
> Thanks,
>
> Ratko


The first time I used Zope, I immediately had an issue of overriding a
predefined
methods without knowing it (there were 400+ methods inherited from
dozens of base
classes). So I wrote this utility:


def check_if_I_am_overriding_names():
    """Prints a message if we are overriding a name. Useful for
framework
    beginners. Example in Zope:

    >> from OFS.Folder import Folder
    >> class MyFolder(OFS.Folder):
    ..    check_if_I_am_overriding_names()
    ..    id = 'pippo'
    ..
    AlreadyDefinedNameWarning: id
    """

    def makecls(name, bases, dic):
        for nam, val in dic.iteritems():
            if nam.endswith("__") or nam == "meta_types":
                # ignore redefinitions of special names
                # and redefinition of meta_types (for Zope code)
                continue
            any_base_has_name = [base for base in bases
                                 if hasattr(base, nam)]
            if any_base_has_name:
                print "AlreadyDefinedNameWarning: " + nam
        return type(name, bases, dic)

    f = sys._getframe(1)
    f.f_locals["__metaclass__"] = makecls

    Michele Simionato



From duncan.booth at invalid.invalid  Mon Sep 24 10:43:36 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 24 Sep 2007 14:43:36 GMT
Subject: Converting numbers to unicode charaters
References: <1190641342.127770.115610@y42g2000hsy.googlegroups.com>
	<fd8h60$6p5$1@news2.u-psud.fr>
Message-ID: <Xns99B5A0000722Dduncanbooth@127.0.0.1>

Laurent Pointal <laurent.pointal at limsi.fr> wrote:

> You may eventually use a more condensed expression and avoid n 
> concatenation of n chars using join, like this:
> 
> >>> u''.join(unichr(int(x,16)) for x in ['42','72','61','64'])
> u'Brad'

Or even avoid the loop completely:

>>> hexs = ['42', '72', '61', '64']
>>> u'\\x'.join(['']+hexs).decode('string-escape')
'Brad'

(but for that to work you really do need to be sure that all the values are 
2 characters).


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Sep 18 10:46:27 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 18 Sep 2007 16:46:27 +0200
Subject: Memory Problem
In-Reply-To: <mailman.716.1190123927.2658.python-list@python.org>
References: <mailman.710.1190118615.2658.python-list@python.org>	<5la11gF71rf0U2@mid.uni-berlin.de>
	<mailman.716.1190123927.2658.python-list@python.org>
Message-ID: <46efe4bb$0$14248$426a74cc@news.free.fr>

Christoph Scheit a ?crit :
> On Tuesday 18 September 2007 15:10, Marc 'BlackJack' Rintsch wrote:
>> On Tue, 18 Sep 2007 14:06:22 +0200, Christoph Scheit wrote:
>>> Then the data is added to a table, which I use for the actual
>>> Post-Processing. The table is actually a Class with several "Columns",
>>> each column internally being represented by array.

(snip)

> I have to deal with several millions of data, actually I'm trying an example 
> with
> 360 grid points and 10000 time steps, i.e. 3 600 000 entries (and each row 
> consits of 4 int and one float)

Hem... My I suggest that you use a database then ? If you don't want to 
bother with a full-blown RDBMS, then have a look at SQLite - it's 
lightweight, works mostly fine and is a no-brainer to use.

> Of course, the more keys the bigger is the dictionary, but is there a way to 
> evaluate the actual size of the dictionary?

You can refer to the thread "creating really big lists" for a Q&D, raw 
approx of such an evaluation. But it's way too big anyway to even 
consider storing all this in ram.



From Shawn at Milochik.com  Wed Sep  5 10:27:08 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Wed, 5 Sep 2007 10:27:08 -0400
Subject: PythonAlley.com
Message-ID: <2dc0c81b0709050727q7e56e99dnf8918e7d143d53a@mail.gmail.com>

I bought the domain PythonAlley.com (and PerlAlley.com and
RubyAlley.com) not too long ago. I had the inspiration to make some
kind of community site thing, but never did get around to it.

Does anyone have any ideas as to what a wonderful use for
PythonAlley.com would be? I'd really like to do something with at
least the Python site, since I love Python. Not too sure about the
others -- maybe I'm make them wikis and open them up to the community.
Maybe I should just sell them.

Ideas?

Thanks,
Shawn


From fakeaddress at nowhere.org  Sat Sep 15 00:55:55 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Fri, 14 Sep 2007 21:55:55 -0700
Subject: Possible suggestion for removing the GIL
In-Reply-To: <1189657576.772108.136550@d55g2000hsg.googlegroups.com>
References: <1189657576.772108.136550@d55g2000hsg.googlegroups.com>
Message-ID: <fBJGi.8104$z_5.2260@nlpi069.nbdc.sbc.com>

Prateek wrote:
[...]
> Mainly it revolves around dedicating one core for executing
> synchronized code and doing context switches instead of acquiring/
> releasing locks.
> 
> http://www.brainwavelive.com/blog/index.php?/archives/12-Suggestion-for-removing-the-Python-Global-Interpreter-Lock.html

Context switches are generally more expensive than acquiring
and release locks. Most systems' run-queues are protected by
locks. The context switches at issue all involve the
dedicated core, so I do not see any parallelism advantage.


-- 
--Bryan


From ldo at geek-central.gen.new_zealand  Mon Sep 24 03:58:25 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 24 Sep 2007 19:58:25 +1200
Subject: Would Anonymous Functions Help in Learning Programming/Python?
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<mailman.900.1190414696.2658.python-list@python.org>
	<1190415741.380795.259050@y42g2000hsy.googlegroups.com>
Message-ID: <fd7qn1$n3o$1@lust.ihug.co.nz>

In message <1190415741.380795.259050 at y42g2000hsy.googlegroups.com>, Cristian
wrote:

> I think it would make more sense to have beginners _know_ that functions
> are like all other variables ...

Functions are not variables. Though they are values, and can be held in
variables.

In Python, every name is a variable, and can be assigned to.


From arkanes at gmail.com  Fri Sep 28 12:05:10 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Fri, 28 Sep 2007 11:05:10 -0500
Subject: Python 3.0 migration plans?
In-Reply-To: <1190993122.979034.305060@50g2000hsm.googlegroups.com>
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>
	<87641v4j38.fsf@benfinney.id.au>
	<1190949502.875203.57690@w3g2000hsg.googlegroups.com>
	<5m3p1dFbl98pU1@mid.uni-berlin.de>
	<1190968707.799398.232550@19g2000hsx.googlegroups.com>
	<5m4126FbgjabU1@mid.uni-berlin.de>
	<1190993122.979034.305060@50g2000hsm.googlegroups.com>
Message-ID: <4866bea60709280905l1c5a88f1q11516e4eeddba5b0@mail.gmail.com>

On 9/28/07, TheFlyingDutchman <zzbbaadd at aol.com> wrote:
> On Sep 28, 2:49 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> > TheFlyingDutchman wrote:
> >

> > All serious languages are turing-complete. So can we put away with this
> > non-sense argument right away, please?
>
> You said it was a most basic language feature. I still haven't heard
> anything that leads me to believe that statement is correct. What
> languages implemented decorators as a most basic language feature?
> Python didn't have them for over a decade so it doesn't qualify.
>

Decorators are syntax sugar for higher order functions. Higher order
functions are a both a basic and a fundamental language feature, and
exist in many languages. The fact that you don't know this just
proves, once again, that you like to talk more than you like to learn.


From deets at nospam.web.de  Tue Sep 18 11:09:36 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 18 Sep 2007 17:09:36 +0200
Subject: Saving parameters between Python applications?
References: <1189969538.830532.98840@g4g2000hsf.googlegroups.com>
	<fcm036$cp8$1@news2.u-psud.fr>
	<1190060967.696332.113190@n39g2000hsh.googlegroups.com>
	<1190122569.509673.41420@57g2000hsv.googlegroups.com>
Message-ID: <5la81hF6t0khU1@mid.uni-berlin.de>

Stodge wrote:

> os.path.expanduser isn't an option; I need each console/window to
> maintain different values which I wouldn't get from saving to a user's
> home directory. Unless I used a different file for each console/window
> but that just gets me into the same situation I'm already in. I think
> the only option is to set environment variables using another script.
> I'm really surprised and disapponited by this.

you can't do that either. It's the principle behind environment-vars that
you can't alter the ones of your parent process.

That's the reason why environment-changes must be done by using "source":


# source my_script

where my_script contains e.g.

export FOO="bar"


If you can have your user alter his/her .bashrc, you might consider creating
a environtment-variable in there that the subsequent script invocations
refer to. Like this:

# .bashrc
export SESSION=<create some unique name using e.g. date>

Then in the python-scripts you can use SESSION as a common prefix
into /tmp-residual files or such thing.

Diez


From wolf_tracks at invalid.com  Thu Sep 20 15:54:56 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Thu, 20 Sep 2007 19:54:56 GMT
Subject: Python Imaging Library Handbook--Printing It?
Message-ID: <keAIi.51110$Um6.25792@newssvr12.news.prodigy.net>

Is there a pdf file for this somewhere, or another type of file. It would be 
good to print the whole thing at once. Ah, I see there's a pdf for an 
earlier version. Apparently, nothing for 1.1.4.
<http://www.pythonware.com/library/pil/handbook/introduction.htm>
-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From ajaksu at gmail.com  Fri Sep  7 15:27:45 2007
From: ajaksu at gmail.com (ajaksu)
Date: Fri, 07 Sep 2007 19:27:45 -0000
Subject: Speed of Python
In-Reply-To: <mailman.236.1189186629.2658.python-list@python.org>
References: <1189185542.798286.168880@50g2000hsm.googlegroups.com>
	<mailman.236.1189186629.2658.python-list@python.org>
Message-ID: <1189193265.845514.190500@y42g2000hsy.googlegroups.com>

On Sep 7, 2:37 pm, "wang frank" <f... at hotmail.co.jp> wrote:
> I am not familiar with python, so I just simply try to reproduce the same
> code in python.
Seems almost correct, but from what I guess of MatLab, George's
suggestions make it a bit more fair.

> If you think that my python script is not efficient, could you tell me how
> to make it more efficient?
In pure Python? No idea (besides using Roberto's and George's
suggestions). If you allow for extensions, Istvan has the answer. If
you allow compiling Python to C++ (using ShedSkin: http://shed-skin.blogspot.com/),
here's a small report:

----------
ajaksu at Belkar:~/sandbox$ cat bench.py
import math
n = 1
def bench1(n):
        for i in range(n):
                for j in range(1000):
                        m=j+1
                        z=math.log(m)
                        z1=math.log(m+1)
                        z2=math.log(m+2)
                        z3=math.log(m+3)
                        z4=math.log(m+4)
                        z5=math.log(m+5)
                        z6=math.log(m+6)
                        z7=math.log(m+7)
                        z8=math.log(m+8)
                        z9=math.log(m+9)
        return z9
a = bench1(10)

ajaksu at Belkar:~/sandbox$ ss -e bench.py
*** SHED SKIN Python-to-C++ Compiler 0.0.22 ***
Copyright 2005-2007 Mark Dufour; License GNU GPL version 2 (See
LICENSE)
(Please send bug reports here: mark.dufour at gmail.com)

[iterative type analysis..]
**
iterations: 2 templates: 44
[generating c++ code..]
ajaksu at Belkar:~/sandbox$ make bench.so
g++  -O3 -s -pipe -fomit-frame-pointer  -I/home/ajaksu/shedskin-0.0.22/
lib -g -fPIC -I/usr/include/python2.5 -D__SS_BIND /home/ajaksu/
shedskin-0.0.22/lib/builtin.cpp /home/ajaksu/shedskin-0.0.22/lib/
math.cpp bench.cpp -lgc  -shared -Xlinker -export-dynamic -lpython2.5 -
o bench.so

ajaksu at Belkar:~/sandbox$ mv bench.py pbench.py

ajaksu at Belkar:~/sandbox$ ipython
Python 2.5.1 (r251:54863, May  2 2007, 16:56:35)
[...]
In [1]: from pbench import bench1 as pbench1

In [2]: from bench import bench1

In [3]: %timeit a = bench1(10)
100 loops, best of 3: 10.2 ms per loop

In [4]: %timeit a = pbench1(10)
10 loops, best of 3: 92.8 ms per loop

----------

I guess you'd also see nice improvements from Pyrex or Cython, Blitz
and other tools. Check http://wiki.python.org/moin/PythonSpeed/PerformanceTips
for the general ideas and http://scipy.org/PerformancePython for an
insight on available tools that even compares their speeds to Matlab.

And-if-you-run-more-benchmarks-please-do-post-them-ly yrs,
Daniel



From http  Thu Sep  6 04:44:38 2007
From: http (Paul Rubin)
Date: 06 Sep 2007 01:44:38 -0700
Subject: Autogenerate functions (array of lambdas)
References: <1189067829.685339.50550@y42g2000hsy.googlegroups.com>
Message-ID: <7xr6lc6v49.fsf@ruckus.brouhaha.com>

Chris Johnson <effigies at gmail.com> writes:
> a = [lambda: i for i in range(10)]
> print [f() for f in a]
> results in: [9, 9, 9, 9, 9, 9, 9, 9, 9, 9]
> rather than the hoped for: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

The usual idiom is

  a = [lambda i=i: i for i in range(10)]

That way i is not a free variable in the lambda.


From bignose+hates-spam at benfinney.id.au  Wed Sep  5 00:01:51 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 05 Sep 2007 14:01:51 +1000
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<87hcmhebwv.fsf@benfinney.id.au> <5jn9qgFdmbcU3@mid.uni-berlin.de>
	<1188886461.236237.168230@y42g2000hsy.googlegroups.com>
	<fbl6pe$2vd$1@lust.ihug.co.nz>
Message-ID: <871wdd92vk.fsf@benfinney.id.au>

Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> writes:

> In message <1188886461.236237.168230 at y42g2000hsy.googlegroups.com>,
> Jason wrote:
> 
> > The reason why the exception is more Pythonic is that the return
> > value is always a guaranteed good index into the list.
> 
> How do you explain dict.get, then?

I explain it by noting that list.index and dict.get serve totally
different purposes. The former returns the index given a value; the
latter returns a value given a key.

There are many areas of poor symmetry in the language and libraries;
it isn't particularly clever or difficult to find them if one
looks. Doing so doesn't appear to illustrate any point I see relevant
in this thread.

-- 
 \     "If you're a horse, and someone gets on you, and falls off, and |
  `\      then gets right back on you, I think you should buck him off |
_o__)                                     right away."  -- Jack Handey |
Ben Finney


From gh at gregor-horvath.com  Sun Sep  9 15:10:29 2007
From: gh at gregor-horvath.com (Gregor Horvath)
Date: Sun, 09 Sep 2007 21:10:29 +0200
Subject: Class design (information hiding)
In-Reply-To: <1i44z4p.fbrtvc1qvlmitN%aleax@mac.com>
References: <fbr2gg$ipg$1@online.de>
	<42d6c$46e138d3$547078de$10495@news.chello.at>
	<1i44z4p.fbrtvc1qvlmitN%aleax@mac.com>
Message-ID: <9d017$46e44525$547078de$8339@news.chello.at>

Alex Martelli schrieb:
> 
> Why, thanks for the pointer -- I'm particularly proud of having written
> """
> The only really workable way to develop large software projects, just as
> the only really workable way to run a large business, is a state of
> controlled chaos.
> """

Yes, indeed a good saying.
The problem is that we do not understand those complex systems, despite 
the fact that some megalomaniacal people think they do.

Declaring a method as private, public or protected assumes that the 
author fully understands the uses of this class by other programmers or 
even himself later on.
But if the software is complex enough, chances are good that he does 
*NOT* understand it fully at the time he writes "Protected".

Programming means attempting. Attempt implies failure. Flexible systems 
that are built for easy correction are therefore superior.

Greg


From cjw at sympatico.ca  Fri Sep 28 16:55:20 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Fri, 28 Sep 2007 16:55:20 -0400
Subject: Python 3.0 migration plans?
In-Reply-To: <46FD40A5.8030504@holdenweb.com>
References: <mailman.1195.1190936289.2658.python-list@python.org>	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>	<87641v4j38.fsf@benfinney.id.au>	<1190949502.875203.57690@w3g2000hsg.googlegroups.com>	<5m3p1dFbl98pU1@mid.uni-berlin.de>	<1190968707.799398.232550@19g2000hsx.googlegroups.com>	<5m4126FbgjabU1@mid.uni-berlin.de>	<1190993122.979034.305060@50g2000hsm.googlegroups.com>	<mailman.1236.1190995515.2658.python-list@python.org>	<1190997769.002795.59450@57g2000hsv.googlegroups.com>	<5m4qc2Fbbk19U1@mid.uni-berlin.de>	<1191000394.828693.285210@k79g2000hse.googlegroups.com>
	<46FD40A5.8030504@holdenweb.com>
Message-ID: <46FD6A38.5070606@sympatico.ca>

Steve Holden wrote:
> TheFlyingDutchman wrote:
>> On Sep 28, 10:01 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>>> On Fri, 28 Sep 2007 09:42:49 -0700, TheFlyingDutchman wrote:
>>>> Which of the common languages have higher order functions and what is
>>>> the syntax?
>>> C, C++, Pascal, Perl, PHP, Ruby have them.  And of course the functional
>>> languages, most notably Lisp and Scheme as you asked for common languages.
>>>
>>> Don't know if C#'s delegates qualify.
>>>
>>> Ciao,
>>>         Marc 'BlackJack' Rintsch
>> What is the syntax of a higher order function in C, C++ and Pascal?
>>
> This is like listening to a four-year-old torment its parents with 
> incessant questions. Do you *have* to ask every question that pops into 
> your mind?
> 
> regards
>   Steve
Tut Tut!

A reasonable question is being asked.

Colin W.



From horpner at yahoo.com  Tue Sep 11 09:57:55 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Tue, 11 Sep 2007 13:57:55 GMT
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
	<1188735642.391419.103650@19g2000hsx.googlegroups.com>
	<1188740716.423349.304370@y42g2000hsy.googlegroups.com>
	<1188743299.664137.194760@d55g2000hsg.googlegroups.com>
	<46daeaec$0$19889$426a74cc@news.free.fr>
	<46DB04DD.80801@v.loewis.de>
	<46db085d$0$16113$9b4e6d93@newsspool1.arcor-online.net>
	<13dmctogeh19410@corp.supernews.com>
	<bCMCi.38254$G23.34196@newsreading01.news.tds.net>
	<m2lkbdsizs.fsf@manolo-blahnik.bibliotech.com>
Message-ID: <slrnfed7sh.1tc.horpner@FIAD06.norwich.edu>

On 2007-09-11, Robert Brown <bbrown at speakeasy.net> wrote:
> Neil Cerutti <horpner at yahoo.com> writes:
>
>> On 2007-09-02, Steven D'Aprano
>> <steve at REMOVE-THIS-cybersource.com.au> wrote:
>>> A big question mark in my mind is Lisp, which according to
>>> aficionados is just as dynamic as Python, but has native
>>> compilers that generate code running as fast as highly
>>> optimized C.
>
>> Lisp, as far as I know, requires type declarations,
>> discipline, deep knowledge of Lisp, and more than passing
>> knowledge of your Lisp implementation in order to generate
>> code that's competitive with C.
>
> On my Mac Mini, the original Python code runs in 6 minutes 37
> seconds using Python 2.3.5.  The Common Lisp code below, a
> straightforward translation, containing *no* type declarations,
> runs in 27 seconds on the same Mini using SBCL.
>
> When the commented out optimization declaration is included in
> the code, the run time drops to 3.3 seconds.  For comparison,
> run times with GCC on the C version posted earlier are 3.5
> seconds unoptimized and 0.58 seconds with optimization flag
> "-O3".
>
> So for this example, deep knowledge of the Lisp implementation
> and type declarations are not required to get speed equivalent
> to unoptimized C code. Approaching the speed of optimized C
> code does require more work.

>====================
>
> (defun doit ()
> ;;  (declare (optimize (speed 3) (safety 0) (debug 0)))
>   (let ((solutions (make-array 1001 :initial-element 0)))
>     (loop for a upfrom 1 below 10000
>           do (loop for b upfrom 1 below (- 1000 a)
>                    do (loop for c upfrom 1 below (- 1000 a b)
>                             do (let ((p (+ a b c)))
>                                  (when (and (< p 1000)
>                                             (= (+ (* a a) (* b b)) (* c c)))
>                                    (incf (aref solutions p)))))))
>     (loop with max-index = 0
>           with max = 0
>           for solution across solutions
>           for index upfrom 0
>           do (when (> solution max)
>                (setf max solution)
>                (setf max-index index))
>           finally (print max-index))))

That's pretty cool. Thanks for the example.

-- 
Neil Cerutti


From nyamatongwe+thunder at gmail.com  Mon Sep 17 02:35:30 2007
From: nyamatongwe+thunder at gmail.com (Neil Hodgson)
Date: Mon, 17 Sep 2007 06:35:30 GMT
Subject: Try this
In-Reply-To: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>
References: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>
Message-ID: <SepHi.1695$9r.698@news-server.bigpond.net.au>

GeorgeRXZ:

> Then Open the Notepad and type the following sentence, and save the
> file and close the notepad. Now reopen the file and you will find out
> that, Notepad is not able to save the following text line.

    This is a known issue with Notepad. See the "Unicode detection" 
section of http://en.wikipedia.org/wiki/Notepad

    Neil


From gagsl-py2 at yahoo.com.ar  Sun Sep  9 15:17:49 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 09 Sep 2007 16:17:49 -0300
Subject: /dev/null as a file-like object, or logging to nothing
References: <87k5r1jdzq.fsf@wilson.homeunix.com>
	<5kg48jF33dv5U3@mid.uni-berlin.de>
	<87fy1pjbpl.fsf@wilson.homeunix.com>
Message-ID: <op.tyeijzs9x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 08 Sep 2007 14:42:14 -0300, Torsten Bronger  
<bronger at physik.rwth-aachen.de> escribi?:

>> `os.devnull`?
>
> Yes, but I wasn't really sure how portable it is, in particular, on
> Windows.  So does
>
> open(os.devnull, "w").write("Schallalla")
>
> work on Windows like on Unix?

Yes. os.devnull=='nul' on Windows.

-- 
Gabriel Genellina



From stefan.behnel-n05pAM at web.de  Fri Sep 21 09:12:21 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Fri, 21 Sep 2007 15:12:21 +0200
Subject: __contains__() : Bug or Feature ???
In-Reply-To: <1190380085.770828.19400@o80g2000hse.googlegroups.com>
References: <1190380085.770828.19400@o80g2000hse.googlegroups.com>
Message-ID: <46F3C335.60905@web.de>

sebastien.lannez at gmail.com wrote:
> I need to overload the operator in and let him
> return an object ... It seems it is not a
> behavior Python expect :
> 
>>>> class A:
> ...    def __contains__(self,a):
> ...        return 'yop'
> ...
>>>> a=A()
>>>> print 'toto' in a
> True

Not sure what you're trying to achieve, but the semantics of the "in" operator
make it return a boolean value. The string "yop" evaluates to the boolean
value True, as it is not empty.

Stefan


From wizzardx at gmail.com  Sat Sep  8 16:28:03 2007
From: wizzardx at gmail.com (David)
Date: Sat, 8 Sep 2007 22:28:03 +0200
Subject: Organizing Code - Packages
In-Reply-To: <1189280539.449868.169910@22g2000hsm.googlegroups.com>
References: <1189177596.960379.244990@w3g2000hsg.googlegroups.com>
	<46e17143$0$6189$426a74cc@news.free.fr>
	<1189183088.922537.18290@r34g2000hsd.googlegroups.com>
	<87r6laa0ir.fsf@rudin.co.uk>
	<46e1a0bc$0$7689$9b4e6d93@newsspool2.arcor-online.net>
	<1189280539.449868.169910@22g2000hsm.googlegroups.com>
Message-ID: <18c1e6480709081328i1f95e67cje22409de1657c3da@mail.gmail.com>

>
> How do import statements that are declared at the top of a python
> module work?
>
> for instance....
>
> from MyModule.Objects import *
>
> class Class:
>       def function:
>            #here i cannot access the things that should have been
> imported from the above statement
>            #i printed the dir() function to verify this

I have seen this myself (stuff seemingly not imported) when 2 modules
import each other, perhaps indirectly, and try to use elements from
each other (at the global/declaration step, rather than in functions.
Logic that runs later (not during the import phase) still works fine,
however)). This sounds like the problem you're having, but your code
snippet isn't complete enough for me to tell. The way to fix this is
generally to move out stuff used by both modules into a separate
module.

Another reason can be that the imported module should be but isn't
setting the "__all__" variable. (in general the "import *" syntax is
frowned upon, it reduces readability).


From aahz at pythoncraft.com  Wed Sep 19 11:20:35 2007
From: aahz at pythoncraft.com (Aahz)
Date: 19 Sep 2007 08:20:35 -0700
Subject: Using pseudonyms (was Re: Python 3K or Python 2.9?)
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<mailman.726.1190130940.2658.python-list@python.org>
	<fcot65$1us$1@panix3.panix.com>
	<46effd63$0$16044$426a74cc@news.free.fr>
Message-ID: <fcreo3$iug$1@panix3.panix.com>

In article <46effd63$0$16044$426a74cc at news.free.fr>,
Bruno Desthuilliers  <bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote:
>Aahz a ?crit :
>> In article <mailman.726.1190130940.2658.python-list at python.org>,
>> Steve Holden  <steve at holdenweb.com> wrote:
>>> Aahz wrote:
>>>> In article <46ef893c$0$21882$426a34cc at news.free.fr>,
>>>> Bruno Desthuilliers  <bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote:
>>>>> Aahz a ?crit :
>>>>>> In article <46ee2d9d$0$26213$426a74cc at news.free.fr>,
>>>>>> Bruno Desthuilliers  <bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote:
>>>>>>> But what, given that I'm an AOL user still thinking it's kewl to hide 
>>>>>>> behind a pseudo, what else would you expect ?
>>>>>> What exactly is a "pseudo", pray tell?
>>>>> Sorry : a pseudonym (a nickname).
>>>>
>>>> You apparently missed the thrust of my sarcasm.  You can't tell what is
>>>> or is not a pseudonym online.  For all I know, "Bruno Desthulliers" is a
>>>> pseudonym.  While I recognize that there is some social advantage to
>>>> linking consistent identifiers with people, I have I think understandable
>>>> irritation with people who insist that names follow certain patterns.
>>>>
>>>> (For those joining only recently, my full legal name is "Aahz", which I
>>>> changed from my former name precisely because of attitudes like Bruno's.)
>
>For the record, I usually don't give a damn about what
>name/nickname/whatever peoples use.

Then why mention pseudonyms at all?
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

The best way to get information on Usenet is not to ask a question, but
to post the wrong information.


From pyth0nc0d3r at gmail.com  Fri Sep 14 19:50:33 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Fri, 14 Sep 2007 18:50:33 -0500
Subject: Is there some sort of Python Error log.
Message-ID: <eb79828c0709141650r238b6699x6a3a3dedd3d3c157@mail.gmail.com>

Command prompt is a pain and it would be pretty nice to have this feature.
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From arkanes at gmail.com  Thu Sep 20 13:18:07 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 20 Sep 2007 12:18:07 -0500
Subject: Sets in Python
In-Reply-To: <Xns99B16684BC49AOKB@199.45.49.11>
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
	<CeB*qHeVr@news.chiark.greenend.org.uk>
	<1190235483.412972.81280@v23g2000prn.googlegroups.com>
	<13f3m15igkstq2e@corp.supernews.com>
	<1190260923.243865.312190@z24g2000prh.googlegroups.com>
	<13f4nclh902f78f@corp.supernews.com>
	<Xns99B16684BC49AOKB@199.45.49.11>
Message-ID: <4866bea60709201018y119f05f6v76e9c5c86ef45976@mail.gmail.com>

On 9/20/07, OKB (not okblacke) <brenNOSPAMbarn at nobrenspambarn.net> wrote:
> Steven D'Aprano wrote:
>
> > But of course you can't look up the dict by value, only by
> > identity. But that's what you wanted.
>
>         Actually, if I understand the OP's examples right, he wants to look
> up only by value, not by identity.
>

He's switched at least twice, as I understand his writing. Currently,
he appears to want to look up by value, copying lists on insertion,
and is ignoring what happens if you mutate the key.


From dorjetarap at googlemail.com  Mon Sep 17 15:04:11 2007
From: dorjetarap at googlemail.com (dorje tarap)
Date: Mon, 17 Sep 2007 20:04:11 +0100
Subject: pattern combinations
Message-ID: <d6a0d8f10709171204v5a8b0ff5haab94b80e2c28e1@mail.gmail.com>

Hi all,

Given some patterns such as "...t...s." I need to make all possible
combinations given a separate list for each position. The length of the
pattern is fixed to 9, so thankfully that reduces a bit of the complexity.

For example I have the following:

pos1 = ['a',' t']
pos2 = ['r', 's']
pos3 = ['n', 'f']

So if the pattern contains a '.' character at position 1 it could be 'a' or
't'. For the pattern '.s.' (length of 3 as example) all combinations would
be:

asn
asf
tsn
tsf

Thanks
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From BjornSteinarFjeldPettersen at gmail.com  Sat Sep 29 14:24:15 2007
From: BjornSteinarFjeldPettersen at gmail.com (thebjorn)
Date: Sat, 29 Sep 2007 11:24:15 -0700
Subject: strange unbound local error?
In-Reply-To: <1191089079.818739.245820@22g2000hsm.googlegroups.com>
References: <1191089079.818739.245820@22g2000hsm.googlegroups.com>
Message-ID: <1191090255.338427.260390@w3g2000hsg.googlegroups.com>

On Sep 29, 8:04 pm, rig... at arcor.de wrote:
> hi folks,
>
> suppose this snipplet:
>
> spam = 42
>
> def eggs():
>     print spam
>     spam = spam + 1
>
> if __name__=="__main__":
>     eggs()
>
> This thows an UnboundLocalError at line 4 (print statement). But if I
> comment out line 5 (variable assignment), no error occurs.
>
> Can you explain me this, please?
>
> Regards,
> Enrico

If you're going to assign to a global variable in a function, you need
to declare it as such:

spam = 42

def eggs():
    global spam
    print spam
    spam = spam + 1

When Python sees an assignment to an identifier in a function it
creates a variable that is local to the function (otherwise you'd be
unable to create local variables with the same name as any of the
global variables).

-- bjorn





From steve at REMOVE-THIS-cybersource.com.au  Sun Sep 30 09:19:06 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sun, 30 Sep 2007 13:19:06 -0000
Subject: Optparse and help formatting?
References: <mailman.1294.1191120597.2658.python-list@python.org>
	<87abr423hu.fsf@benfinney.id.au>
	<mailman.1303.1191155842.2658.python-list@python.org>
Message-ID: <13fv8ia94nq69d3@corp.supernews.com>

On Sun, 30 Sep 2007 07:37:10 -0500, Tim Chase wrote:

>   def format_option(self, option):
>     # The help for each option consists of two parts: 
>     #   * the opt strings and metavars
[snip]

Tim, I notice you're using lots of # lines as comments to describe the 
function. Perhaps you should consider using docstrings instead.

Pardon me if I'm telling you what you already know... 

A docstring is a string that immediately follows a class, function or 
method declaration, or at the beginning of a module:


def parrot():
    "This is a doc string."
    s = "this is not a docstring"


The advantage of docstrings is that unlike # comments, they aren't 
discarded at compile time, and can be accessed by the caller:

>>> parrot.__doc__
'This is a doc string'

This is especially useful in the interactive interpreter, where 
help(object) will grab the docstring and format it nicely on screen.



-- 
Steven.


From iddw at hotmail.com  Tue Sep 11 15:25:34 2007
From: iddw at hotmail.com (Dave Hansen)
Date: Tue, 11 Sep 2007 12:25:34 -0700
Subject: Car-ac-systems
In-Reply-To: <1189532573.728913.306470@g4g2000hsf.googlegroups.com>
References: <cd6dnW0Vf8-wOnvbRVnyhwA@eclipse.net.uk>
	<b0ac48a01b8bb8c9c2b92ff03bf0@msnews.microsoft.com>
	<1189532573.728913.306470@g4g2000hsf.googlegroups.com>
Message-ID: <1189538734.525106.191550@b32g2000prf.googlegroups.com>

On Sep 11, 12:42 pm, Zentrader <zentrad... at gmail.com> wrote:
> <snip>
> What is it about "please do not top-post" that you have difficulty
> understanding? Or do "MVP"s feel that their time is so much more
> valuable than anyone else's that they are free to ignore the norms?
>
> Who made this the norm?

http://www.ietf.org/rfc/rfc1855.txt

If you don't know what the IETF is, or what an RFC is, you should
educate yourself.
http://www.ietf.org/glossary.html#IETF is a good place to start.

>                           In my travels through web-land, it appears to

Usenet is not "web-land".  And it is not Google Groups, either.  Look
up
http://www.faqs.org/faqs/usenet/welcome/part1/ for more info

> be the opposite.  Don't waste space repeating everything in every
> post, and it wastes everyone's time by have to go over the same thing
> again and again.  Perhaps this thread has a purpose after all, anyway
> it has been reported as spam.

You have much to learn.

Regards,

   -=Dave



From steven at REMOVE.THIS.cybersource.com.au  Thu Sep  6 23:42:07 2007
From: steven at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Fri, 07 Sep 2007 03:42:07 -0000
Subject: concise code (beginner)
References: <13dsvqrqivtf092@corp.supernews.com>
	<13dv4uqqb806ff0@corp.supernews.com>
	<13dvvgk96amhhec@corp.supernews.com>
	<13e1cbetihma1d6@corp.supernews.com>
Message-ID: <pan.2007.09.07.03.42.06@REMOVE.THIS.cybersource.com.au>

On Fri, 07 Sep 2007 12:03:26 +1000, bambam wrote:

> Hi Steven.
> 
> Looking at your code, why are you naming the value __all__? It looks
> like a built-in variable?

When you say:

from module import *

Python looks in the module for a list of names called "__all__", and 
imports only the names in that list. It is recommended that your modules 
take advantage of that feature. I'm just using the same name.


> Unless there is an automatic way to correctly get the function list, I
> will probably be better off giving the lines sequence numbers, and
> generating the function list from that.

I don't understand what you mean by "giving the lines sequence numbers". 
Where do they come from? How do you go from sequence numbers to functions?

As far as I am concerned, the right behavior is for the module containing 
the functions to define which functions need to be tested. Since modules 
aren't actually intelligent, that means some person needs to list the 
functions. Why list the function NAME when you can list the function 
itself?



From gagsl-py2 at yahoo.com.ar  Mon Sep 24 22:19:13 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 24 Sep 2007 23:19:13 -0300
Subject: Python script to optimize XML text
References: <496954360709241336i43173947sda5245c2d7477ecb@mail.gmail.com>
Message-ID: <op.ty6t2brkx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 24 Sep 2007 17:36:05 -0300, Robert Dailey <rcdailey at gmail.com>  
escribi?:

> I'm currently seeking a python script that provides a way of optimizing  
> out
> useless characters in an XML document to provide the optimal size for the
> file. For example, assume the following XML script:
>
> <root>
>     <Test></Test>
>     <!-- <CommentedOutElement/> -->
>
>     <!-- Do Something Else -->
> </root>
>
> By running this through an XML optimizer, the file would appear as:
>
> <root><Test/></root>

ElementTree does that almost for free. I've just posted an example.

source = """<root>
      <Test></Test>
      <!-- <CommentedOutElement/> -->

      <!-- Do Something Else -->
</root>"""

import xml.etree.ElementTree as ET
tree = ET.XML(source)
print ET.tostring(tree)

Output:
<root>
      <Test />



</root>

If you still want to remove all whitespace:

def stripws(node):
     if node.text:
         node.text = node.text.strip()
     if node.tail:
         node.tail = node.tail.strip()
     for child in node.getchildren():
         stripws(child)
stripws(tree)
print ET.tostring(tree)

Output:
<root><Test /></root>

-- 
Gabriel Genellina



From rabidpoobear at gmail.com  Sat Sep 15 00:09:52 2007
From: rabidpoobear at gmail.com (Luke Paireepinart)
Date: Fri, 14 Sep 2007 23:09:52 -0500
Subject: [pygame] Re: Just bought Python in a Nutshell
In-Reply-To: <eb79828c0709141459y264bc21fg4fcd17a4217cad65@mail.gmail.com>
References: <eb79828c0709132112o5a3e7137n5ae5cd55e3e0b839@mail.gmail.com>	
	<mailman.520.1189748935.2658.python-list@python.org>	
	<1189784843.896396.108960@g4g2000hsf.googlegroups.com>	
	<eb79828c0709141312v588ef074w25c2200c37951098@mail.gmail.com>	
	<59f9c5160709141412q1098a4cbi989b6eed2f2cc899@mail.gmail.com>	
	<eb79828c0709141432t582ddccbsda4750a4011666a9@mail.gmail.com>
	<eb79828c0709141459y264bc21fg4fcd17a4217cad65@mail.gmail.com>
Message-ID: <46EB5B10.2020100@gmail.com>

Lamonte Harris wrote:
> Wow I just got it, and its nice doesn't even look used god damn. :D.
It's generally considered rude to curse in technical forums such as this.
Also, please use more punctuation.  You're hard to understand sometimes.
-Luke


From claird at lairds.us  Fri Sep 14 10:37:00 2007
From: claird at lairds.us (Cameron Laird)
Date: Fri, 14 Sep 2007 14:37:00 +0000
Subject: automatic parallelization
References: <KYidna_Q5d86FnTbnZ2dnUVZ_sSlnZ2d@speakeasy.net>
	<46E99488.20909@uni-oldenburg.de> <alior4-0pu.ln1@lairds.us>
	<1338560.ksk72Tk4Kk@aldan.algebra.com>
Message-ID: <ctiqr4-6gj.ln1@lairds.us>

In article <1338560.ksk72Tk4Kk at aldan.algebra.com>,
Mikhail Teterin  <usenet+meow at aldan.algebra.com> wrote:
			.
			.
			.
>> I'm fond of Linda <URL:
>> http://www.unixreview.com/documents/s=10125/ur0704l/ >, Parallel 
>> Python <URL: http://www.parallelpython.com/ > only one of several
>> initiatives which aspire to exploit multicores, and so on.
>
>Linda URL does not open... I'll look into Parallel Python, but it is
			.
			.
			.
It comes and goes.  It seems to have been OK the last several hours.


From Caseyweb at gmail.com  Thu Sep 27 12:58:44 2007
From: Caseyweb at gmail.com (Casey)
Date: Thu, 27 Sep 2007 16:58:44 -0000
Subject: True of False
In-Reply-To: <mailman.1173.1190911739.2658.python-list@python.org>
References: <1190910814.594559.30880@n39g2000hsh.googlegroups.com>
	<mailman.1173.1190911739.2658.python-list@python.org>
Message-ID: <1190912324.363127.26100@r29g2000hsg.googlegroups.com>

On Sep 27, 12:48 pm, "Simon Brunning" <si... at brunningonline.net>
wrote:
> On 9/27/07, kou... at hotmail.com <kou... at hotmail.com> wrote:
>
> > I tried writing a true and false If statement and didn't get
> > anything?  I read some previous posts, but I must be missing
> > something.  I just tried something easy:
>
> > a = ["a", "b", "c", "d", "e", "f"]
>
> > if "c" in a == True:
> >      Print "Yes"
>
> > When I run this, it runs, but nothing prints.  What am I doing wrong?
>
> Just use
>
> if "c" in a:
>
> and all will be well. The True object isn't the only truthy value in
> Python - see <http://docs.python.org/lib/truth.html>.

I would recommend the OP try this:

run the (I)python shell and try the following:

>>> a = [x for x in "abcdefg"]
>>> a
['a','b','c','d','e','f','g']
>>> "c" in a
True
>>> "c" in a == True
False
>>> ("c" in a) == True
True

The reason your conditional failed is that it was interpreted as "c"
in (a == True) which is False.
the "==" operator binds at a higher precedence level than the "in"
operator, just as multiplication
binds higher than addition




From carsten at uniqsys.com  Sat Sep 22 16:50:03 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Sat, 22 Sep 2007 16:50:03 -0400
Subject: frange() question
In-Reply-To: <87odfuwoh8.fsf@pobox.com>
References: <fctrc1$doh$1@news.nems.noaa.gov> <87tzppjhe4.fsf@pobox.com>
	<mailman.827.1190318121.2658.python-list@python.org>
	<87lkaz40sj.fsf@pobox.com>
	<mailman.927.1190476490.2658.python-list@python.org>
	<87odfuwoh8.fsf@pobox.com>
Message-ID: <1190494203.3266.21.camel@localhost.localdomain>

On Sat, 2007-09-22 at 18:21 +0000, John J. Lee wrote:
> Carsten Haese <carsten at uniqsys.com> writes:
> > The second half of my post illustrates a difference of opinion about
> > what constitutes a generator function. You state that frange() is not a
> > generator function because it doesn't use yield, but it behaves like
> > one. My point is that it *is* a generator function because the generator
> > expression is merely syntactic sugar for an equivalent for/yield loop.
> 
> Seems to me that's a definitional thing, with no conceptual content,
> so "difference of opinion" seems an odd choice of words.  It would be
> nice to nail the definitions down.  Do the Python docs do that?
> 
> 
> > Of course, the distinction of whether frange() *is* a generator function
> > or merely *behaves* as one is immaterial in practice, and we can both be
> > right in the absence of a formal definition of what a generator function
> > is. PEP 255 says "A function that contains a yield statement is called a
> > generator function," but that was written before generator expressions
> > were introduced.
> 
> Ah, they do -- thanks.  Though I'm now left puzzled why you express
> your "difference of opionion" above...

It's a matter of opinion whether the excerpt from the PEP constitutes
the formal definition of what a generator function is or isn't. A formal
definition needs conditions that are both sufficient and necessary. The
PEP only says that having a yield statement is sufficient for making a
generator function. It doesn't say that a yield statement is necessary
for making a generator function. In other words, it doesn't say that a
function that doesn't contain a yield statement isn't a generator
function.

The language reference is equally wishy-washy: "Using a yield statement
in a function definition is *sufficient* to cause that definition to
create a generator function instead of a normal function." [emphasis
mine]

Again, no indication that a yield statement is necessary for making a
generator function. It then proceeds to saying "When a generator
function is called, it returns an iterator known as a generator
iterator, or more commonly, a generator." That condition seems to be
true for the OP's frange() function, even though it doesn't have a yield
statement.

Until somebody can point out a definition that says unequivocally "an
object is a generator function if and only if ...", it's up in the air
whether frange() is a generator function or merely impersonates a
generator function. Ultimately, though, this is a purely academic
question without a useful answer. The useful conclusion is that a
function can behave like a generator function without a yield statement,
and we have reached that conclusion a long time ago.

-- 
Carsten Haese
http://informixdb.sourceforge.net




From zzbbaadd at aol.com  Thu Sep 13 13:10:57 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Thu, 13 Sep 2007 10:10:57 -0700
Subject: Python 3K or Python 2.9?
In-Reply-To: <46e96aaa$0$7685$9b4e6d93@newsspool2.arcor-online.net>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<87sl5j5r34.fsf@benfinney.id.au>
	<1189646281.569796.267940@d55g2000hsg.googlegroups.com>
	<87ir6f5mrq.fsf@benfinney.id.au>
	<1189651204.408268.57580@19g2000hsx.googlegroups.com>
	<1i4dddf.piaojwz9lz40N%aleax@mac.com>
	<1189700775.661780.292150@50g2000hsm.googlegroups.com>
	<46e96aaa$0$7685$9b4e6d93@newsspool2.arcor-online.net>
Message-ID: <1189703457.297526.172460@50g2000hsm.googlegroups.com>


>
> Isn't one of the main ideas behind python that it doesn't force you to
> do (well, declare) anything? And by "ideas" I mean "design decisions".
> Thats exactly what makes python great for prototyping; you just do it
> and see if it works. As soon as you need to declare things you have to
> change stuff in at least 2 places for every change of heart you have.
>
> (Can you tell I'm currently forced to developing in Java? ;) (Which I'm
> currently avoiding to do, by wasting my time on usenet.))
>
But if you are looking at code you didn't write, it's nice to be able
to see all the member variables that a class has listed separate from
method code.

I think static typing helps in trying to deduce what code is doing,
particularly when you are looking at function definitions. You don't
have to work to find out what type of variables it takes.




From paul at boddie.org.uk  Mon Sep 10 09:55:55 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Mon, 10 Sep 2007 06:55:55 -0700
Subject: uninstall
In-Reply-To: <mailman.318.1189431943.2658.python-list@python.org>
References: <mailman.318.1189431943.2658.python-list@python.org>
Message-ID: <1189432555.060384.194820@50g2000hsm.googlegroups.com>

On 10 Sep, 15:45, Milos Prudek <pru... at bvx.cz> wrote:
> I run "make install" of Python 2.4.4 and now I discovered that I do not like
> the default placement of my install. The Makefile does not support
> an "uninstall" option.
>
> Is there a way to uninstall Python compiled from sources?

If you're installing from sources "manually", you might want to
consider checkinstall to give you the option of an uninstall for those
software distributions which don't support "make uninstall":

http://www.asic-linux.com.mx/~izto/checkinstall/

I seem to recall at some point doing a checkinstall on one or more
programs, installing the resulting packages, then uninstalling them in
order to remove installed files. That might be one approach you could
take, although it obviously won't restore any files overwritten when
you originally installed Python. That said, Python tends to install
into /usr/local by default and is fairly conservative about where it
puts its files, so it's unlikely that anything was overwritten.

Paul



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Sep 27 05:14:14 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 27 Sep 2007 11:14:14 +0200
Subject: Using closures and partial functions to eliminate redundant code
References: <N9EKi.37131$RX.19410@newssvr11.news.prodigy.net>
Message-ID: <5m1aj6FahetoU1@mid.individual.net>

Matthew Wilson wrote:

> I'm interested to hear how other people deal with really similar
> code.
> The similarity just bugs me.  However, I wonder if using stuff
> like closures or partial function application is needlessly showy.

ACK -- but not because it's showy, but because it may be more
error-prone and less readable. I'd often use an approach like this:

def create_user(username, userpassword, useremail, create = False):
    """
    Send an email that will update a user in the remote system.
    If create evaluates to True, don't update the user, but create
    her instead.
    """
    if not create:
        subject = "UPDATE"
    else:
        subject = "CREATE"

    # Build email
    email_body = """
USERNAME = %s
USERPASSWORD = %s
USEREMAIL = %s
""" % (username, userpassword, useremail)
    # send it.
    send_email(subject=subject, body=email_body)

Regards,


Bj?rn

-- 
BOFH excuse #353:

Second-system effect.



From steve at REMOVE-THIS-cybersource.com.au  Sat Sep 15 20:40:13 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sun, 16 Sep 2007 00:40:13 -0000
Subject: Needless copying in iterations?
References: <fchk59$mm3$1@daisy.noc.ucla.edu>
	<5l3ab6F5v20uU3@mid.uni-berlin.de>
Message-ID: <13eourdrne86e61@corp.supernews.com>

On Sun, 16 Sep 2007 00:05:58 +0000, Marc 'BlackJack' Rintsch wrote:

> On Sat, 15 Sep 2007 14:58:15 -0700, James Stroud wrote:
> 
>> I was staring at a segment of code that looked like this today:
>> 
>>     for something in stuff[x:y]:
>>       whatever(something)
>> 
>> and was wondering if the compiler really made a copy of the slice from
>> stuff as the code seems to suggest, or does it find some way to produce
>> an iterator without the need to make a copy (if stuff is a built-in
>> sequence type)?
> 
> The compiler can't "optimize" this as it would change the semantics.
> There's no way for the compiler to tell if this copy really is
> "needless". `whatever()` may change `stuff[i]` where `i` is in `x:y` and
> this may lead to different results wether it iterates over a copy or the
> original.

In *general* the compiler can't tell, but in specific cases it could. A 
(hypothetical) optimizing compiler would tell the difference between:


for item in alist[1:5]:
    print item # no possible side-effects


for item in alist[1:5]:
    function(alist, item) # there might be side-effects


for item in alist[1:5]:
    alist.append(item) # side-effects DON'T matter


for i, item in enumerate(alist[1:5]):
    alist[i+1] = function(item) # side-effects DO matter


Of course this is all besides the point, since no such optimizing 
compiler exists today, at least not for CPython. Any volunteers?


-- 
Steven.


From mstepnicki at gmail.com  Wed Sep 26 09:39:22 2007
From: mstepnicki at gmail.com (=?iso-8859-2?q?Marcin_St=EApnicki?=)
Date: Wed, 26 Sep 2007 13:39:22 +0000 (UTC)
Subject: scope, modyfing outside object from inside the method
References: <fd7m9s$9fe$1@news2.task.gda.pl>
	<mailman.1011.1190671351.2658.python-list@python.org>
Message-ID: <fddnea$229$1@news2.task.gda.pl>

Dnia Mon, 24 Sep 2007 10:41:22 -0300, Ricardo Ar?oz napisa?(a):

> Would this work for you?

Thank you both for help. Well - yes and no :). It's getting more
interesting:

First, your code:

class myrow():
  def __init__(self, idict = {}):
        self.container = idict
  def __str__ (self):
        return self.container.__str__()

results = [
        {'a': 12, 'b' :30 },
        {'a': 13, 'b' :40 }
]

mystruct = []

for row in results:
    mystruct.append(myrow(row))

results[1]['b'] = 444

print results  # [{'a': 12, 'b': 30}, {'a': 13, 'b': 444}]

print mystruct # does not work ok , you should probably define
               # mystruct's __str__ method properly

# But, save for the __str__ thingy, the rest is ok.

for row in mystruct:
    print row

# {'a': 12, 'b': 30}
# {'a': 13, 'b': 444}

And now let's try to swap results with something else:

print id(results)

# new resultset 
results = [
        {'a': 112, 'b' : 130 },
        {'a': 113, 'b' : 140 }
]

print id(results)
for row in mystruct:
    print row

# {'a': 12, 'b': 30}
# {'a': 13, 'b': 444}

At first glance (before adding id()) it's a little bit weird. The original
object was supposedly "overwritten", but as one can see it has different
id then the new one. mystruct still holds references to old object,
though. I can handle it and just change original object, but I'm curious
if there's a way to "swap" them "on-the-fly".

Thanks one again.

-- 
| And Do What You Will be the challenge | http://apcoln.linuxpl.org
|    So be it in love that harms none   | http://biznes.linux.pl
|   For this is the only commandment.   | http://www.juanperon.info
`---*  JID: Aragorn_Vime at jabber.org *---' http://www.naszedzieci.org


From Shawn at Milochik.com  Wed Sep 19 13:15:30 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Wed, 19 Sep 2007 13:15:30 -0400
Subject: [Tutor] Finding prime numbers
In-Reply-To: <2dc0c81b0709191013k181d1a74m76a08cecadb005c4@mail.gmail.com>
References: <1190218927.7991.25.camel@apprentice-laptop>
	<82b4f5810709190931u16ee0621xc6608d2bcb2fec5e@mail.gmail.com>
	<1190219929.7991.28.camel@apprentice-laptop>
	<2dc0c81b0709191013k181d1a74m76a08cecadb005c4@mail.gmail.com>
Message-ID: <2dc0c81b0709191015l1ac39615ya541e307abe5c372@mail.gmail.com>

Okay, I caught one bug already myself:

 for y in range(3,(math.sqrt(x) + 1)):

should be

for y in range(3,(int(math.sqrt(x)) + 1)):


From spam.noam at gmail.com  Tue Sep 18 11:49:45 2007
From: spam.noam at gmail.com (spam.noam at gmail.com)
Date: Tue, 18 Sep 2007 15:49:45 -0000
Subject: How can I know how much to read from a subprocess
In-Reply-To: <slrnfevb8h.299.hat@se-162.se.wtb.tue.nl>
References: <1190070896.332844.23080@22g2000hsm.googlegroups.com>
	<1190072376.600475.254260@y42g2000hsy.googlegroups.com>
	<slrnfevb8h.299.hat@se-162.se.wtb.tue.nl>
Message-ID: <1190130585.255648.312730@q3g2000prf.googlegroups.com>

On Sep 18, 1:48 pm, "A.T.Hofkamp" <h... at se-162.se.wtb.tue.nl> wrote:
> On 2007-09-17, spam.n... at gmail.com <spam.n... at gmail.com> wrote:
>
> > It seems that another solution is gobject.io_add_watch, but I don't
> > see how it tells me how much I can read from the file - if I don't
> > know that, I won't know the argument to give to the read() method in
> > order to get all the data:
>
> >http://www.pygtk.org/docs/pygobject/gobject-functions.html#function-g...
>
> Usually, gobject only tells you that data is there (that is all it knows).
> Therefore a read(1) should be safe.

But even if it's fast enough, how do you know how many times you
should call read(1)? If you do it too much, you'll be blocked until
more output is available.

> If that is too slow, consider os.read() which reads all data available (afaik,
> never tried it myself).
>
I tried it now, and it blocks just like the normal file.read().

Thanks,
Noam



From larry.bates at websafe.com  Wed Sep 19 10:27:34 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Wed, 19 Sep 2007 09:27:34 -0500
Subject: Using python to create windows apps that everyone can use?
In-Reply-To: <mailman.736.1190143365.2658.python-list@python.org>
References: <7C008A37566.00000D2Atomharding@inbox.com>
	<mailman.736.1190143365.2658.python-list@python.org>
Message-ID: <psmdnZVVOcNOrGzbnZ2dnUVZ_uvinZ2d@comcast.com>

Matt McCredie wrote:
> On 9/18/07, Thomas Harding <tomharding at inbox.com> wrote:
>> Hi guys, sorry to post another topic on this, as I am aware that it has
>> already been posted a few times, but not with specifically what I am looking
>> for. I want an app that makes a gui interface for python (similar to
>> Microsoft visual studio or qt designer, not a code based one) and/or an app
>> that can make this into a .exe that can be opened by any person on any
>> computer without python installed.
> 
> check out py2exe: http://py2exe.org
> 
> matt

Might want to take a look at wxGlade (http://wxglade.sourceforge.net), you will 
need wxWindows and py2exe to complete the toolkit.

-Larry


From bj_666 at gmx.net  Mon Sep 10 16:31:07 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 10 Sep 2007 20:31:07 GMT
Subject: memcpy
References: <1189449530.171049.323230@22g2000hsm.googlegroups.com>
Message-ID: <5klnsbF3vfqqU10@mid.uni-berlin.de>

On Mon, 10 Sep 2007 11:38:50 -0700, Tim wrote:

> How do I memcpy from a pointer to an array of floats in python?
> 
> I get errors: NameError: global name 'row' is not defined

Well than the (global) name `row` is not defined.  Quite clear message,
isn't it?  ;-)

> I want to be able to get the row[i] array element. In C I would
> normally place the address of row as the first argument.
> 
> cdll.msvcrt.memcpy( row, pData, 256 )
> 
> 
> If I define row as the following I also get the following error:
> 
> row = ones( TOTAL_PARAMETER_ENTRIES, dtype=float )
> 
> ArgumentError: argument 1: <type 'exceptions.TypeError'>: Don't know
> how to convert parameter 1

You don't give enough information so we have to guess.  For example I
guess the `ones()` function comes from one of the packages `numeric`,
`numarray` or `numpy`!?

This function returns a Python object.  You can't use arbitrary Python
objects with `ctypes`.  `memcpy` expects a pointer not an object.

Ciao,
	Marc 'BlackJack' Rintsch


From szhorvat at gmail.com  Wed Sep 12 09:51:15 2007
From: szhorvat at gmail.com (=?ISO-8859-1?Q?Szabolcs_Horv=E1t?=)
Date: Wed, 12 Sep 2007 15:51:15 +0200
Subject: pythonesque constructs for c++
In-Reply-To: <fc8oc8$12vc$1@grapevine.csail.mit.edu>
References: <fc8oc8$12vc$1@grapevine.csail.mit.edu>
Message-ID: <fc8qsl$kfn$1@toralf.uib.no>

Josh wrote:
> One of the best features of python is its ease of use, and the ease of use 
> of its modules. Modules like os, os.path, and datetime are invaluable!
> 
> Does anyone know of analagous c++ libraries? It seems to me that most of the 
> functionality of these modules could easily be replicated in c++. Before I 
> go about doing that, I was just wondering if anyone knows if they already 
> exist?

Check out Boost.

http://www.boost.org/
http://www.boost.org/libs/filesystem/doc/index.htm
http://www.boost.org/doc/html/date_time.html

-- 
Szabolcs


From kostaspaxos at yahoo.gr  Sat Sep 15 05:24:01 2007
From: kostaspaxos at yahoo.gr (Konstantinos Pachopoulos)
Date: Sat, 15 Sep 2007 12:24:01 +0300
Subject: trim start and trailing space chars from string
Message-ID: <46EBA4B1.1030302@yahoo.gr>

Hi,
is there something corresponding to the java String.trim() method, ie 
trim start and trailing space/tab chars from string?
say convert " asdf   "  to "asdf"?

Thnx


From naga86 at gmail.com  Mon Sep 10 05:50:30 2007
From: naga86 at gmail.com (Nagarajan)
Date: Mon, 10 Sep 2007 02:50:30 -0700
Subject: less obvious "super"
Message-ID: <1189417830.645749.226120@d55g2000hsg.googlegroups.com>

Hi group,
I am confused with "super" usage..It seems to be complicated and less
obvious.
Here is what I need to achieve..

class A :
    def __init__( self ):
        self.x  = 0

class B ( A ):
    def __init__( self, something ):
        # Use "super" construct here so that I can "inherit" x of A
        self.y  = something

How should I use "super" so that I could access the variable "x" of A
in B?

Thanks!



From super.sgt.pepper at gmail.com  Fri Sep 21 17:37:18 2007
From: super.sgt.pepper at gmail.com (Cristian)
Date: Fri, 21 Sep 2007 21:37:18 -0000
Subject: Would Anonymous Functions Help in Learning Programming/Python?
Message-ID: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>

A friend of mine is an engineer and he's been needing to do more and
more programming as he goes on with is career. I convinced him to
learn Python instead of Perl and he's really started to like it. He
usually comes to me when he can't accomplish a task with his current
knowledge and I introduce him to a new feature in Python. FYIW, he
thought List Comprehensions were freakin' awesome. He's started
writing his own personal scripts for tasks like web scraping. So, from
personal experience, Python truly is a great first language to learn.

Although his learning experience has gone mostly smoothly, he's hit a
lot of speed bumps with functions. Specifically, he's having trouble
thinking of functions as first order data (don't worry, I haven't
confused him with such terminology yet). He had a little trouble
understanding that you can pass functions as arguments to other
functions (e.g., passing a key to the list.sort method). He also had a
little trouble grasping functions within other functions. Last but not
least, he had trouble grasping methods in class declarations,
especially the required self as the first argument (I'm sure he wasn't
the first).

Now, my friend's a smart guy so I know it isn't any lack of brain
cells on his part. I still remember many students in my CS classes
having trouble grasping the very same concept. And, after we finally
get a hold of first order functions, we appreciate its incorporation
into languages. It would be a shame if my friend just learns the
motions and never incorporates first order functions into his
programs. I began to wonder if there was anything Python could do to
help newcomers grasp the power of first order functions or, as
Pythonistas put it, everything is an object.

To me, the biggest setback for new programmers is the different syntax
Python has for creating functions. Instead of the common (and easy to
grasp) syntax of foo = bar Python has the def foo(): syntax. So, when
a new programmer is first introduced to functions they are immediately
confronted with the notion that functions are "different". After all,
they have their own special syntax. This seems to only further the
separation newbies make between "data" and "functions" or "stuff" and
"actions". Now, the vast majority of us learned this dichotomy when we
first began to program, so we are ingrained to assume and even expect
a different syntax for function declaration, but in a program like
Python there doesn't seem to be any other reason to have it.
Furthermore, I think it actually inhibits the learning of the
uninitiated. We can, of course, keep the current syntax as sugar.

To someone who's learning to program wouldn't a syntax like the
further give them all they need and also reinforces the idea that
functions are data just like everything else?

my_function = function(foo, bar): pass
an_instance_method = function(self, foo): pass
a_method_declaration = method(self, foo): pass

The last one is mostly my pet peeve of having Python "magically"
create methods out of (what is essentially) a function declaration.
When I first learned it, it felt wrong but you had to press through it
because there was really no other way of declaring methods.

What do you think? Have you hit this roadblock when helping others
learn Python? Does the current syntax make you feel that functions are
still treated as second class (get it?) citizens?



From python at rcn.com  Mon Sep 24 18:04:56 2007
From: python at rcn.com (Raymond Hettinger)
Date: Mon, 24 Sep 2007 15:04:56 -0700
Subject: Can a base class know if a method has been overridden?
In-Reply-To: <1190647436.423328.217670@w3g2000hsg.googlegroups.com>
References: <1190647436.423328.217670@w3g2000hsg.googlegroups.com>
Message-ID: <1190671496.599826.215840@y42g2000hsy.googlegroups.com>

On Sep 24, 8:23 am, Ratko <rjago... at gmail.com> wrote:
> Hi all,
>
> I was wondering if something like this is possible. Can a base class
> somehow know if a certain method has been overridden by the subclass?
> I appreciate any ideas.
> Thanks,
>
> Ratko


It's not hard.  Both bound and unbound methods have an im_func
attribute pointing to the underlying function code.  So you can check
for overrides by testing whether the underlying functions are the
same:

>>> class A:
	def p(self): pass
	def q(self): pass


>>> class B(A):
	def q(self): pass


>>> b = B()
>>> b.p.im_func is A.p.im_func     # Verify that b.p runs A.p
True
>>> b.q.im_func is A.q.im_func     # Verify that b.q overrides A.q



Raymond

False



From paul.nospam at rudin.co.uk  Tue Sep 18 04:44:59 2007
From: paul.nospam at rudin.co.uk (Paul Rudin)
Date: Tue, 18 Sep 2007 09:44:59 +0100
Subject: can Python be useful as functional?
References: <1190073045.618869.261290@k79g2000hse.googlegroups.com>
Message-ID: <87odg0l5v8.fsf@rudin.co.uk>

Lorenzo Stella <lorestar at gmail.com> writes:

> Hi all,
> I haven't experienced functional programming very much, but now I'm
> trying to learn Haskell and I've learned that: 1) in functional
> programming LISTS are fundmental; 2) any "cycle" in FP become
> recursion.
> I also know that Python got some useful tool such as map, filter,
> reduce... so I told: "let's try some FP-style programming with
> Python!". I took a little example of Haskell:
>
>      listprimes :: Integer -> [Integer]
>      listprimes n = if n == 0 then sieve [2..] else sieve [2..(n-1)]
> where
>             sieve [] = []
>             sieve (p:xs) = p : sieve (filter (\x -> mod x p > 0) xs)
>
> and I tried to "translate" it in Python:
>
>      def sieve(s):
>          if s == []:
>              return []
>          else:
>              return [s[0]] + sieve(filter((lambda x: x % s[0] > 0),
> s[1:]))
>
>      def listprimes(n):
>          return sieve(range(2,n))
>
> These should be almost the same: listprimes actually lists prime
> integers up to n-1. The result is: Haskell implementation works well,
> maybe it's not the better way to do it, but it does what I wanted.
> Python implementation gives me
>
>      RuntimeError: maximum recursion depth exceeded in cmp
>
> My question is: how can we call a language "functional" if it's major
> implementation has a limited stack? Or is my code wrong?

It's no tthat it's "wrong", but doing recursion in python can be
problematic because there's no tail recursion optimisation and the
size of the stack is limited (so eventually you'll run out of stack if
you recurse deep enough).

One way to capture the spirit of that Haskell program in Python is to
use things from itertools; something like this (modified from
<http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/117119>):


import itertools
def listprimes(n):

    def sieve(nums):
        seq = nums
        while True:
            prime = seq.next()
            seq = itertools.ifilter(prime.__rmod__, seq)
            yield prime

    if n == 0:
        return sieve(itertools.count(2))
    else:
        return sieve(itertools.islice(itertools.count(2), n-1))

>>> list(listprimes(100))
[2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97]



From steve at holdenweb.com  Sun Sep 16 21:56:52 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 16 Sep 2007 21:56:52 -0400
Subject: where are the .pyc files?
In-Reply-To: <1189992200.860524.58620@w3g2000hsg.googlegroups.com>
References: <1189963710.714191.74440@n39g2000hsh.googlegroups.com>	<5l57t1F655kfU5@mid.uni-berlin.de>
	<1189992200.860524.58620@w3g2000hsg.googlegroups.com>
Message-ID: <fckmt3$qu0$1@sea.gmane.org>

Summercool wrote:
> On Sep 16, 10:36 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>> The `*.pyc` files are usually only created when you import a module, not
>> when a module is run directly.
> 
> how come a program that runs directly doesn't need to be optimized
> into bytecode first?  Or... is it that the interpreter will just run
> the program as it goes by, without ever generating a .pyc file?   So
> what if you have a program that you only update every few weeks...
> then you can ask a .pyc to be generated so that it runs faster every
> time?
> 
> 
You can, if you want, compile a program manually:

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

and run the resulting .pyc file if you wish. Most people don't bother, 
though. If you have a very large main program you can encapsulate it as 
a library and then call the library function from a teent-weeny main 
program that isn't worth compiling.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From zzbbaadd at aol.com  Wed Sep 12 20:33:36 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Wed, 12 Sep 2007 17:33:36 -0700
Subject: Python 3K or Python 2.9?
In-Reply-To: <5kr8vlF53m8gU3@mid.individual.net>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
Message-ID: <1189643616.826715.58150@d55g2000hsg.googlegroups.com>

On Sep 12, 3:53 pm, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:
> TheFlyingDutchman wrote:
> > In C++ and Java I don't believe "this" is ever referred to as an
> > implicit function parameter.
>
> Oh yes, it is. All methods use it as a base address into instances.
> Implicitly though.

I am not talking about how the implementation of a C++ or Java
compiler uses the this pointer/this reference internally. I am talking
about how an author describes in English the "this" pointer/reference
in their book on programming C++ or Java.

I don't think you will find them saying that under the covers "this"
was passed to the method (if in fact it is). They just say that it
refers to the current object inside that object's method.

Here is a link to a tutorial where Sun is talking about the this
reference:
http://java.sun.com/docs/books/tutorial/java/javaOO/thiskey.html



> > If it is in fact a real parameter in the underlying compiled-code
> > implementation, that knowledge hurts more than it helps.
>
> To which language are you referring here, Python or C++? No matter
> what, I still don't really understand why it hurted.
>
I am referring to C++. If someone is trying to learn the language,
knowledge of the internal implemenation is counter-productive in my
opinion because it distracts from the details they need to learn. If
they are experienced and want to learn about the internals to
potentially help them code in the most blazingingly fast manner they
ideally would just be reminded they are using C++ and not some slower
byte-code executed language where it could possibly matter. ;)



From aahz at pythoncraft.com  Mon Sep 17 21:01:46 2007
From: aahz at pythoncraft.com (Aahz)
Date: 17 Sep 2007 18:01:46 -0700
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<87ir6f5mrq.fsf@benfinney.id.au> <1189651204.408268.57580@1
	<46ee2d9d$0$26213$426a74cc@news.free.fr>
Message-ID: <fcn81q$g80$1@panix3.panix.com>

In article <46ee2d9d$0$26213$426a74cc at news.free.fr>,
Bruno Desthuilliers  <bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote:
>
>But what, given that I'm an AOL user still thinking it's kewl to hide 
>behind a pseudo, what else would you expect ?

What exactly is a "pseudo", pray tell?
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

The best way to get information on Usenet is not to ask a question, but
to post the wrong information.


From khemkaamit at gmail.com  Mon Sep  3 05:34:39 2007
From: khemkaamit at gmail.com (Amit Khemka)
Date: Mon, 3 Sep 2007 15:04:39 +0530
Subject: TypeError: 'module object is not callable'
In-Reply-To: <46dbd11e$0$6228$426a74cc@news.free.fr>
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<mailman.315.1188810174.28954.python-list@python.org>
	<46dbd11e$0$6228$426a74cc@news.free.fr>
Message-ID: <1360b7230709030234r4fd2b74q789dfd15f128309d@mail.gmail.com>

On 9/3/07, Bruno Desthuilliers
<bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote:
> Amit Khemka a ?crit :
> (snip)
> > The exception is being raised as you are being confused about the
> > names ie: you have a class named "Step" in a module named "Step.py" .
>
> <nitpicking>
> Actually, the module is named 'Step', not 'Setp.py' !-)
> </nitpicking>
>
<humble-acknowledgment>
Yup, My Bad ! Thanks.
</humble-acknowledgment>
-- 
----
Amit Khemka
website: www.onyomo.com
wap-site: www.owap.in


From jscrerar at compuserve.com  Sat Sep 29 16:34:34 2007
From: jscrerar at compuserve.com (Jim)
Date: Sat, 29 Sep 2007 13:34:34 -0700
Subject: Command-line does work when scheduled
Message-ID: <1191098074.342460.52130@n39g2000hsh.googlegroups.com>

Hi,

I want to schedule a Python program that reads the command line for
input.  However, when adding an argument to the command line Python
will not pick it up when using Windows scheduled tasks.

How do I get it to work?

Thanks,
Jim



From openpavilion at openpavilion.org  Thu Sep 13 07:23:29 2007
From: openpavilion at openpavilion.org (OpenPavilion Team)
Date: Thu, 13 Sep 2007 04:23:29 -0700 (PDT)
Subject: wxstyledtextctrl and xml markup
Message-ID: <12652955.post@talk.nabble.com>


Hello community,

I want to create an editor for a self defined xml markup language. I want to
use wxpython with wxstyledtextctrl and I have looked around at yellowbrain
site, but there are no examples. I also watched the styledtextctrl examples
with wxpython 2.8.4.

What I am looking for is an example of how to do the autocompletion part for
the styledtextctrl based on my self defined XML language.

example:
<profile>
     <connection></connection>
     <company>
          <person></person>
     </company>
     [...]
</profile>


Since I don't know styledtextctrl, I fear that I am about to write a complex
handler for the autocompletion part, whereas there could be some easy to use
features built into styledtextctrl. My problem is that I don't want to
externalize the grammar of the XML instead of coding it inside the
autocompletion handler.

Are there any examples for wxstyledtextctrl, xml and autocompletion ?

Regards
Pavilion
-- 
View this message in context: http://www.nabble.com/wxstyledtextctrl-and-xml-markup-tf4435096.html#a12652955
Sent from the Python - python-list mailing list archive at Nabble.com.



From steven.klass at gmail.com  Thu Sep  6 15:31:34 2007
From: steven.klass at gmail.com (rh0dium)
Date: Thu, 06 Sep 2007 19:31:34 -0000
Subject: Help setting default class attributes
In-Reply-To: <1189101306.620588.89140@r29g2000hsg.googlegroups.com>
References: <1189099594.432512.278950@22g2000hsm.googlegroups.com>
	<1189101306.620588.89140@r29g2000hsg.googlegroups.com>
Message-ID: <1189107094.982955.164690@y42g2000hsy.googlegroups.com>

On Sep 6, 10:55 am, Arnaud Delobelle <arno... at googlemail.com> wrote:
> On Sep 6, 6:26 pm, rh0dium <steven.kl... at gmail.com> wrote:
>
> > Hi all,
>
> > I have the following piece of code and I wanted to set the default
> > attributes based on a dictionary. What I am looking for is a way to
> > take PIPODEFAULTS and assign each one as an attribute for the class
> > pipo.  Can someone show me how to do this by iterating over the
> > PIPODEFAULTS and assign them.  What I would expect to be able to do is
> > call the class and modify them.
>
> Use the setattr(...) function.
>
>
>
> > example:
> > a = pipo()
> > print a.caseSensitivity
> > "preserve"
>
> > a.caseSensitivity = "lower"
> > print a.caseSensitivity
> > "lower"
>
> > Lastly - here is my code:
>
> > class pipo:
>
> >     PIPODEFAULTS={ "caseSensitivity" : "preserve","cellMapTable" :
> > "","checkPolygon" : "nil","compression" : "none",
> >                    "convertDot" : "ignore","convertPathToPoly" :
> > "nil","convertToGeo" : "nil","dumpPcellInfo" : "nil",
> >                    "snapToGrid" : "nil","techFileChoice" :
> > "nil","units": "micron","useParentXYforText" : "nil","viewName" :
> > "layout",
> >                   }
>
> >     def __init__(self, *args, **kwargs):
> >         """This simply will run a PIPO stream out
> >         """
> >         # Setup Logging
> >         self.pipoargs=self.setdefaults()
> >     def setdefaults(self):
> >         for x in self.PIPODEFAULTS:
> >             self.log.debug("Setting %s to %s" % (x,
> > self.PIPODEFAULTS[x]))
>
>     def setdefaults(self):
>         for key, val in self.PIPODEFAULTS.iteritems():
>             setattr(self, key, val)
>

Hey this is great!!!  Simple and clear.   I appreciate it!!




From http  Sat Sep 22 21:10:03 2007
From: http (Paul Rubin)
Date: 22 Sep 2007 18:10:03 -0700
Subject: Getting rid of bitwise operators in Python 3?
References: <46f49740$0$32514$4c368faf@roadrunner.com>
	<miaJi.28220$eY.3184@newssvr13.news.prodigy.net>
	<1190484589.890198.266430@y42g2000hsy.googlegroups.com>
	<13fbahtem90fp99@corp.supernews.com>
	<1190506229.092718.41690@g4g2000hsf.googlegroups.com>
Message-ID: <7xps0achlg.fsf@ruckus.brouhaha.com>

richyjsm at gmail.com writes:
> And who is it who uses this functionality? 

I use it but I agree it's easy to implement given the underlying
bignum arithmetic.

> It's useful in elementary number theory, sure, but I'd argue that if
> there are going to be number theoretical functions in the core then
> there are other things, like gcd(), that are far more deserving of
> inclusion.  

Certainly xgcd should be in the math library or somewhere similar.

> It comes up in the RSA cryptosystem, but if you're using
> Python's pow for this then you're surely only writing a toy RSA
> implementation, perhaps for educational purposes(?).  

Not necessarily.  See for example http://trevp.net/tlslite


From dickinsm at gmail.com  Wed Sep 19 20:25:22 2007
From: dickinsm at gmail.com (Mark Dickinson)
Date: Thu, 20 Sep 2007 00:25:22 -0000
Subject: Sets in Python
In-Reply-To: <1190244370.741482.6540@y27g2000pre.googlegroups.com>
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
	<CeB*qHeVr@news.chiark.greenend.org.uk>
	<1190235483.412972.81280@v23g2000prn.googlegroups.com>
	<1190239608.835359.51150@22g2000hsm.googlegroups.com>
	<1190244370.741482.6540@y27g2000pre.googlegroups.com>
Message-ID: <1190247922.835055.31950@y42g2000hsy.googlegroups.com>

On Sep 19, 7:26 pm, Karthik Gurusamy <kar1... at gmail.com> wrote:
> If I did, a = [10, 20] and I did d[a]= 'foo', then a.append(30).
> If dict complains key error on d[a] now, I won't be surprised. If I do
> d[[10, 20, 30]], I will be surprised if it doesn't find the item. Of
> course, in today's behavior the above is syntax error.

It sounds as though you're proposing something like the following:

>>> k = mylist([1, 2])
>>> d = {k : 'test'}
>>> d[k]
'test'
>>> k.append(3)
>>> d[k]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
KeyError: [1, 2, 3]

So far, so good.  But how do you explain the following to a confused
newcomer?

>>> d.keys()
[[1, 2, 3]]
>>> k in d.keys()
True
>>> k in d
False
>>> d[k]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
KeyError: [1, 2, 3]

In other words, to repeat Sion Arrowsmith's question, what would you
expect d.keys() to return after a key of d has been modified?

Mark



From hniksic at xemacs.org  Wed Sep 26 04:51:26 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Wed, 26 Sep 2007 10:51:26 +0200
Subject: sorteddict PEP proposal [started off as orderedict]
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>
	<1190753722.026806.254530@d55g2000hsg.googlegroups.com>
	<1190756003.292096.71130@o80g2000hse.googlegroups.com>
	<1190789981.385466.37870@57g2000hsv.googlegroups.com>
	<Xns99B760A3F5859duncanbooth@127.0.0.1>
Message-ID: <87sl51lshd.fsf@mulj.homelinux.net>

Duncan Booth <duncan.booth at invalid.invalid> writes:

> I that's the point though: you can't write one implementation that has good 
> performance for all patterns of use

An implementation of sorted dict using a balanced tree as the
underlying data structure would give decent performance in all the
mentioned use cases.  For example, red-black trees search, insert, and
delete in O(log n) time.


From mail at microcorp.co.za  Sat Sep  1 02:57:34 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 1 Sep 2007 08:57:34 +0200
Subject: list index() (OT)
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com><46d674c2$0$417$426a34cc@news.free.fr><1188496588.750629.208100@g4g2000hsf.googlegroups.com><1188497498.3468.60.camel@dot.uniqsys.com><021801c7eba2$ad429640$03000080@hendrik>
	<1cnfd31du01el95u70o8mjn9cb5r5aluiu@4ax.com>
Message-ID: <007f01c7ec65$605e6700$03000080@hendrik>

"Richie Hindle" <richi...ian.com> wrote:

> But - the word for someone who posts to the internet with the intention of
> stirring up trouble derives from the word for what fishermen do, not from
> the word for something that lives under a bridge.  It derives from "trolling
> for suckers" or "trolling for newbies".

So am I right in asserting that there is a difference in pronunciation
of the noun and the verb?

He is a Troll - like the excellent frolic example
He likes to Troll - rhymes with roll?

- Hendrik



From carsten at uniqsys.com  Fri Sep 21 09:16:50 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 21 Sep 2007 09:16:50 -0400
Subject: __contains__() : Bug or Feature ???
In-Reply-To: <1190380085.770828.19400@o80g2000hse.googlegroups.com>
References: <1190380085.770828.19400@o80g2000hse.googlegroups.com>
Message-ID: <1190380610.3393.1.camel@dot.uniqsys.com>

On Fri, 2007-09-21 at 13:08 +0000, sebastien.lannez at gmail.com wrote:
> Hi everybody,
> 
> I need to overload the operator in and let him
> return an object

Why do you think you need to do that? What's the underlying problem
you're trying to solve?

-- 
Carsten Haese
http://informixdb.sourceforge.net




From prudek at bvx.cz  Mon Sep 10 09:45:38 2007
From: prudek at bvx.cz (Milos Prudek)
Date: Mon, 10 Sep 2007 15:45:38 +0200
Subject: uninstall
Message-ID: <200709101545.38785.prudek@bvx.cz>

I run "make install" of Python 2.4.4 and now I discovered that I do not like 
the default placement of my install. The Makefile does not support 
an "uninstall" option.

Is there a way to uninstall Python compiled from sources?

-- 
Milos Prudek


From blackmh at gmail.com  Sun Sep  2 12:27:45 2007
From: blackmh at gmail.com (Kveldulv)
Date: Sun, 02 Sep 2007 09:27:45 -0700
Subject: Glade + Python = No GUI
Message-ID: <1188750465.530463.271750@22g2000hsm.googlegroups.com>

I made simple GUI in Glade 3 (Ubuntu 7.04) consisting of only 2
buttons. When I run
2buttonsgui.py, no GUI pops out

#!/usr/bin/env python
import pygtk
import gtk.glade

class TwoButtonsGUI:
    def __init__(self):
        self.window = gtk.glade.XML("/home/myusername/Desktop/
2buttons.glade", "window1")

if __name__ == '__main__':
    TwoButtonsGUI()
    gtk.main()

When interrupted, I get

File "gui.py", line 11, in <module>
    gtk.main()

When GUI coded manually, all works.

Thanks in advance



From tdwdotnet at gmail.com  Thu Sep 13 16:52:16 2007
From: tdwdotnet at gmail.com (Tim Williams)
Date: Thu, 13 Sep 2007 21:52:16 +0100
Subject: extract text from log file using re
In-Reply-To: <fcc5d3$620$1@sea.gmane.org>
References: <fcc1so$pcv$1@sea.gmane.org> <fcc5d3$620$1@sea.gmane.org>
Message-ID: <9afea2ac0709131352h2f30dac8vc8725e96d2ccf77f@mail.gmail.com>

On 13/09/2007, Fabian Braennstroem <f.braennstroem at gmx.de> wrote:
> me again... I should describe it better:
> the result should be an array with just:
>
> 498 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04 8.3956e-04
> 3.8560e-03 4.8384e-02 11:40:01  499
> 499 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04  8.3956e-04
> 3.8560e-03 4.8384e-02 11:40:01  499
> 500 1.0049e-03 2.4630e-04 9.8395e-05 1.4865e-04 8.3913e-04
> 3.8545e-03 1.3315e-01 11:14:10  500
> 501 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04 8.3956e-04
> 3.8560e-03 4.8384e-02 11:40:01  499
>
> as field values.
>
> Fabian Braennstroem schrieb am 09/13/2007 09:09 PM:
> > Hi,
> >
> > I would like to delete a region on a log file which has this
> > kind of structure:
> >
> >
> > #------flutest------------------------------------------------------------
> >    498 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04
> > 8.3956e-04 3.8560e-03 4.8384e-02 11:40:01  499
> >    499 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04
> > 8.3956e-04 3.8560e-03 4.8384e-02 11:40:01  499
> > reversed flow in 1 faces on pressure-outlet 35.
> >
> > Writing
> > "/home/gcae504/SCR1/Solververgleich/Klimakruemmer_AK/CAD/Daimler/fluent-0500.cas"...
> >  5429199 mixed cells, zone 29, binary.
> > 11187656 mixed interior faces, zone 30, binary.
> >    20004 triangular wall faces, zone 31, binary.
> >     1104 mixed velocity-inlet faces, zone 32, binary.
> >   133638 triangular wall faces, zone 33, binary.
> >    14529 triangular wall faces, zone 34, binary.
> >     1350 mixed pressure-outlet faces, zone 35, binary.
> >    11714 mixed wall faces, zone 36, binary.
> >  1232141 nodes, binary.
> >  1232141 node flags, binary.
> > Done.
> >
> >
> > Writing
> > "/home/gcae504/SCR1/Solververgleich/Klimakruemmer_AK/CAD/Daimler/fluent-0500.dat"...
> > Done.
> >
> >    500 1.0049e-03 2.4630e-04 9.8395e-05 1.4865e-04
> > 8.3913e-04 3.8545e-03 1.3315e-01 11:14:10  500
> >
> >  reversed flow in 2 faces on pressure-outlet 35.
> >    501 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04
> > 8.3956e-04 3.8560e-03 4.8384e-02 11:40:01  499
> >
> > #------------------------------------------------------------------
> >
> > I have a small script, which removes lines starting with
> > '(re)versed', '(i)teration' and '(t)urbulent'  and put the
> > rest into an array:
> >
> > # -- plot residuals ----------------------------------------
> >       import re
> > filename="flutest"
> > reversed_flow=re.compile('^\ re')
> > turbulent_viscosity_ratio=re.compile('^\ tu')
> > iteration=re.compile('^\ \ i')
> >
> > begin_of_res=re.compile('>\ \ \ i')
> > end_of_res=re.compile('^\ ad')
> >
> > begin_of_writing=re.compile('^\Writing')
> > end_of_writing=re.compile('^\Done')
> >
> > end_number=0
> > begin_number=0
> >
> >
> > n = 0
> > for line in open(filename).readlines():
> >     n = n + 1
> >     if begin_of_res.match(line):
> >         begin_number=n+1
> >         print "Line Number (begin): " + str(n)
> >
> >     if end_of_res.match(line):
> >         end_number=n
> >         print "Line Number (end): " + str(n)
> >
> >     if begin_of_writing.match(line):
> >         begin_w=n+1
> >         print "BeginWriting: " + str(n)
> >         print "HALLO"
> >
> >     if end_of_writing.match(line):
> >         end_w=n+1
> >         print "EndWriting: " +str(n)
> >
> > if n > end_number:
> >     end_number=n
> >     print "Line Number (end): " + str(end_number)
> >
> >
> >
> >
> >
> > n = 0
> > array = []
> > array_dummy = []
> > array_mapped = []
> >
> > mapped = []
> > mappe = []
> >
> > n = 0
> > for line in open(filename).readlines():
> >     n = n + 1
> >     if (begin_number <= n) and (end_number > n):
> > #        if (begin_w <= n) and (end_w > n):
> >             if not reversed_flow.match(line) and not
> > iteration.match(line) and not
> > turbulent_viscosity_ratio.match(line):
> >                 m=(line.strip().split())
> >                 print m
> >                 if len(m) > 0:
> > #                    print len(m)
> >                     laenge_liste=len(m)
> > #                    print len(m)
> >                     mappe.append(m)
> >
> >
> > #--end plot
> > residuals-------------------------------------------------
> >
> > This works fine ; except for the region with the writing
> > information:
> >
> > #-----writing information
> > -----------------------------------------
> > Writing "/home/fb/fluent-0500.cas"...
> >  5429199 mixed cells, zone 29, binary.
> > 11187656 mixed interior faces, zone 30, binary.
> >    20004 triangular wall faces, zone 31, binary.
> >     1104 mixed velocity-inlet faces, zone 32, binary.
> >   133638 triangular wall faces, zone 33, binary.
> >    14529 triangular wall faces, zone 34, binary.
> >     1350 mixed pressure-outlet faces, zone 35, binary.
> >    11714 mixed wall faces, zone 36, binary.
> >  1232141 nodes, binary.
> >  1232141 node flags, binary.
> > Done.
> > # -------end writing information -------------------------------
> >
> > Does anyone know, how I can this 'writing' stuff too? The
> > matchingIt occurs a lot :-(
> >
>
> the result should be an array with just:
>
>
> 498 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04 8.3956e-04
> 3.8560e-03 4.8384e-02 11:40:01  499
> 499 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04  8.3956e-04
> 3.8560e-03 4.8384e-02 11:40:01  499
> 500 1.0049e-03 2.4630e-04 9.8395e-05 1.4865e-04 8.3913e-04
> 3.8545e-03 1.3315e-01 11:14:10  500
> 501 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04 8.3956e-04
> 3.8560e-03 4.8384e-02 11:40:01  499


Sometimes Python is so simple there is a tendancy to overthink the
problem <wink>

Based soley on the input and output in your example and not
withstanding errors from the email itself word-wrapping yours and my
text:

>>> print '\r\n'.join([x.strip() for x in open('c:/flutest.txt') if 'e-0' in x])
498 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04
8.3956e-04 3.8560e-03 4.8384e-02 11:40:01  499
499 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04
8.3956e-04 3.8560e-03 4.8384e-02 11:40:01  499
500 1.0049e-03 2.4630e-04 9.8395e-05 1.4865e-04
8.3913e-04 3.8545e-03 1.3315e-01 11:14:10  500
501 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04
8.3956e-04 3.8560e-03 4.8384e-02 11:40:01  499
>>>

HTH :)


From jcd at sdf.lonestar.org  Mon Sep 17 19:21:19 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Mon, 17 Sep 2007 19:21:19 -0400
Subject: adodb with mysql - connection string syntax for filepath
In-Reply-To: <33dffc910709162342x49657895t938fb1f8af2834de@mail.gmail.com>
References: <33dffc910709162342x49657895t938fb1f8af2834de@mail.gmail.com>
Message-ID: <46EF0BEF.3070807@sdf.lonestar.org>

Mridula Ramesh wrote:
> Dear all,
>
> Hi. I am not very tech-savvy so please pardon me if this is a stupid
> question: so far I have been googling for about 4 days to find help
> for this, so now I am desperate! :)
>
> How do you use adodb with mysql to connect to a file that is on your
> machine?
>
I'm not quite sure what you mean by this.  MySQL won't connect you to a
file on your machine.  It will connect you to a database server, which
will possibly access files on your machine, but could just as easily
access an in-memory database, that isn't stored in any files.

I've also never worked with adodb, but if you use MySQLdb, you do the
following:

import MySQLdb as db

cur = db.connect(host='127.0.0.1', #or whatever your hosts address is
                 user=username,
                 passwd=password,
                 db=database).cursor()
cur.execute('SELECT * FROM table')
cur.fetchall()

If adodb is dbapi 2 compliant, it may be as simple as s/MySQLdb/adodb/

> Also, could you please recommend to me a good resource to learn more
> about classes and modules from? i don't understand half of the _init_
> business that many sites mention. (This *is* something even a newbie
> needs to learn, right?)
>
Try this chapter from Diving into Python:

http://www.diveintopython.org/object_oriented_framework/defining_classes.html
> Thank you!
>
> M.R.S.
Cheers,
Cliff


From surekap at gmail.com  Thu Sep 13 00:38:02 2007
From: surekap at gmail.com (Prateek)
Date: Wed, 12 Sep 2007 21:38:02 -0700
Subject: Python Database Apps
In-Reply-To: <mailman.460.1189641373.2658.python-list@python.org>
References: <1189479130.905136.196820@r34g2000hsd.googlegroups.com>
	<mailman.387.1189521302.2658.python-list@python.org>
	<1189536987.259907.68650@e34g2000pro.googlegroups.com>
	<mailman.438.1189600804.2658.python-list@python.org>
	<1189608814.932322.301950@22g2000hsm.googlegroups.com>
	<mailman.460.1189641373.2658.python-list@python.org>
Message-ID: <1189658282.646375.160150@19g2000hsx.googlegroups.com>

On Sep 13, 4:55 am, Ed Leafe <e... at leafe.com> wrote:
> On Sep 12, 2007, at 10:53 AM, darien.watk... at gmail.com wrote:
>
> > Thanks for ideas Ed.  I am checking out dabo now.  I do have a few
> > questions about it.  Packaging.  Is it easy to package into a quick
> > install for windows.  The users are going to want to get too in
> > depth.
>
>         py2exe is your friend here. I know several developers who have used
> this to distribute Dabo apps, so we could certainly help you get your
> setup.py working.
>
> > Second, data sources.  When I'm adding a data source to the
> > window in class designer, it always picks up the one I created (which
> > incidentally was a sample, my form for connection manager isn't
> > working at the moment.)  My idea is to have the the local sqlite
> > database as the only viewable data source, and the server side only
> > for syncing.  So they logon, sync up, sync down, and view.  I'm
> > worried about having to get them to install python, dabo, and the app.
>
>         The users would never see any of the Class Designer, connection
> editor, or any of the other development tools. I would imagine that
> you would need to code the sync parts by getting the current changed
> data from the local SQLite database, creating a connection to the
> server DB, doing the insert/update as needed, grabbing the latest
> from the server, disconnecting from the server, and then updating the
> local data. The user would probably need to do nothing more than
> click a button to start running your code.
>
>         As far as what the user must install, that's what will happen with
> any Python solution. py2exe takes care of all of that, bundling
> Python, Dabo, your database modules, and any other dependencies into
> a single .exe file. You can then use something like Inno Setup to
> create a basic Installer that will look and work like any other
> Windows application installer.
>
> -- Ed Leafe
> --http://leafe.com
> --http://dabodev.com

Have you checked out Brainwave?
http://www.brainwavelive.com

We provide a schema-free non-relational database bundled with an app
server which is basically CherryPy with a few enhancements (rich JS
widgets, Cheetah/Clearsilver templates). Free for non-commercial use.



--Prateek Sureka



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Sep 28 11:55:48 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 28 Sep 2007 17:55:48 +0200
Subject: Delete spaces
In-Reply-To: <1190994234.526554.110870@y42g2000hsy.googlegroups.com>
References: <1190994234.526554.110870@y42g2000hsy.googlegroups.com>
Message-ID: <46fd23d7$0$28052$426a74cc@news.free.fr>

koutoo at hotmail.com a ?crit :
> If I have a text file that is delimited by spaces,

spaces or tabs ?

> how do I import it
> and get to comma delimited?  Here is a row of data from the text file:
> 
> 1    1    10:55:14  2    65   8.5
> 1.4+1.1                       2.5       Class-2   0


> I tried a few examples from the group and it didn't work, since the
> file also has a header row and a row of seperators ( -------).  The
> lengths of each row is something like 130, so there are extra spaces
> after the last value as well.  I have tried joining and other things,
> but I couldn't figure out how to get the values to come together.
> Thanks.

This should answer your question - but certainly not solve your problem 
(cf below):

f = open('/path/to/file.txt');
file.readline(); # skip headers
for line in f:
   # skip separators
   if line.startswith('---'):
     continue
   parts = filter(line.rstrip().split())
   print ';'.join(parts)

f.close()


Now the problem is that, obviously, the position of a group of data in a 
line is meaningfull, so just filtering out spaces isn't the solution. 
Did you check that it's not really a tab-delimited file ? If yes, doing 
line.split('\t') might help. Or just trying with the csv module FWIW.

My 2 cents...


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Sep 14 05:45:35 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 14 Sep 2007 11:45:35 +0200
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<5ksoaoF5am8cU1@mid.individual.net>
	<1189701793.466307.93210@g4g2000hsf.googlegroups.com>
	<5ktfjqF5ctrvU2@mid.individual.net>
	<46e98fd8$0$27757$426a34cc@news.free.fr>
	<5ktre7F5ig0vU1@mid.individual.net>
	<46ea3591$0$21741$426a34cc@news.free.fr>
Message-ID: <5kv3hvF5mo3hU2@mid.individual.net>

Bruno Desthuilliers wrote:
> A method is a thin wrapper around a function, usually instanciated
> and returned by the __get__ method [1] of the function itself when
> the function is looked up as an attribute of a class or an
> instance:
> [...]

That's interesting, thank you for the explanation.

> They aren't, and you should perhaps read the manual - all this is
> documented.

Found it. :)
 
Regards,


Bj?rn

-- 
BOFH excuse #144:

Too few computrons available.



From ebgssth at gmail.com  Sat Sep 15 11:04:14 2007
From: ebgssth at gmail.com (js)
Date: Sun, 16 Sep 2007 00:04:14 +0900
Subject: How to get headers in urllib2 response
In-Reply-To: <1189863876.901048.114410@o80g2000hse.googlegroups.com>
References: <1189863876.901048.114410@o80g2000hse.googlegroups.com>
Message-ID: <a23effaf0709150804m4c8a8e7ck86c49bd7c07bf285@mail.gmail.com>

How about  using httplib?
http://docs.python.org/lib/httplib-examples.html

HTTPResponse has getheaders()  method, too.

On 9/15/07, Johny <python at hope.cz> wrote:
> Can anyone provide an example how to find out the return code and
> header  from an urllib2 request?
> For example
> response = urllib2.urlopen('http://www.google.com').read().strip()
> provides data
>  but I do not know if the return code was 200 or different.
>
> Thanks
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From mail at timgolden.me.uk  Thu Sep  6 10:20:51 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 06 Sep 2007 15:20:51 +0100
Subject: startswith( prefix[, start[, end]])  Query
In-Reply-To: <1189087752.538726.101350@r29g2000hsg.googlegroups.com>
References: <1189087752.538726.101350@r29g2000hsg.googlegroups.com>
Message-ID: <46E00CC3.6020006@timgolden.me.uk>

cjt22 at bath.ac.uk wrote:
> Hi
> 
> startswith( prefix[, start[, end]])  States:
> 
> Return True if string starts with the prefix, otherwise return False.
> prefix can also be a tuple of suffixes to look for. 

That particular aspect of the functionality (the multiple
prefixes in a tuple) was only added Python 2.5. If you're
using <= 2.4 you'll need to use "or" or some other approach,
eg looping over a sequence of prefixes.

TJG


From hassen62 at voila.fr  Fri Sep 21 19:52:46 2007
From: hassen62 at voila.fr (hassen62 at voila.fr)
Date: Sat, 22 Sep 2007 01:52:46 +0200 (CEST)
Subject: How I import xls file
Message-ID: <16968966.390651190418766204.JavaMail.www@wwinf4604>

Hi,
I have installed xlrd for windows but I can't used it succesfully. If I have a file "file.xls", what lines I can write from python to import and visualize this file.
Thank you.
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From steve at holdenweb.com  Fri Sep 14 10:47:22 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 14 Sep 2007 10:47:22 -0400
Subject: recursion
In-Reply-To: <fce42o$sig$1@ss408.t-com.hr>
References: <fcbfnj$lh4$1@ss408.t-com.hr>	<slrnfeinvk.1cc.horpner@FIAD06.norwich.edu>	<mailman.491.1189700115.2658.python-list@python.org>	<slrnfeit3k.1lg.horpner@FIAD06.norwich.edu>	<fcdrv9$7lr$1@ss408.t-com.hr>	<mailman.532.1189774061.2658.python-list@python.org>
	<fce42o$sig$1@ss408.t-com.hr>
Message-ID: <fce6ts$ul9$1@sea.gmane.org>

Gigs_ wrote:
> Steve Holden wrote:
[...]
>>
>> regards
>>  Steve
>  >>> def factorial(n):
>     print "n =", n
>     if n==0:
>         return 1
>     else:
>         return n * factorial(n-1)
> 
>  >>> factorial(3)
> n = 3
> n = 2
> n = 1
> n = 0
> 6
> 
> 
> now i understand. but one question at the end this function return 1. how python 
> knows that it needs to multiply 1 with all recursive returns. (why python didnt 
> sum recursive return with 1?)
> 
> 
> that will be all, thanks in advance

Aah, that's the magic of recursion (not that it's really magic at all).

When you call factorial(3), the function sees the value of n as 3. So 
the if condition is false, so it must execute the return statement.

In order to do that it has to multiply n by the value of factorial n-1. 
So it makes a call to a *new copy* of factorial, and this one has the 
value 2 for n. The if statement again needs to execute the return 
statement, and before it can do that it needs the value of factorial 
n-1, so it makes a call to a *new copy* of factorial, and this one has 
the value 1 for n. The if statement again needs to execute the return 
statement, and before it can do that it needs the value of factorial 
n-1, so it makes a call to a *new copy* of factorial, and this one has 
the value 0 for n. [Are you detecting a pattern here?].

Finally *this* copy of factorial can immediately return the value of 1 
to its caller, which then multiplies that by 1 and returns it ti *its 
caller, which multiplies it by 2 and returns that to *its* caller, when 
multiplies it by 3 and returns the result, 6.

In other words, the computer builds a "stack" of partially-completed 
functions, and unwinds it when the innermost (topmost, whatever) finally 
sees that it can return a result without creating another stacked call 
to factorial.

Hope this straightens it out for you, it's a bit of a head-twister when 
you first come across it.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From aleax at mac.com  Wed Sep 19 00:07:16 2007
From: aleax at mac.com (Alex Martelli)
Date: Tue, 18 Sep 2007 21:07:16 -0700
Subject: Using pseudonyms
References: <46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<87sl5j5r34.fsf@benfinney.id.au>
	<1189646281.569796.267940@d55g2000hsg.googlegroups.com>
	<87ir6f5mrq.fsf@benfinney.id.au>
	<1189651204.408268.57580@19g2000hsx.googlegroups.com>
	<1i4dddf.piaojwz9lz40N%aleax@mac.com>
	<1189700775.661780.292150@50g2000hsm.googlegroups.com>
	<46e97917$0$9014$426a74cc@news.free.fr>
	<mailman.563.1189823461.2658.python-list@python.org>
	<1190013177.473529.167770@o80g2000hse.googlegroups.com>
	<46ee2d9d$0$26213$426a74cc@news.free.fr>
	<fcn81q$g80$1@panix3.panix.com>
	<46ef893c$0$21882$426a34cc@news.free.fr>
	<fcop08$2ue$1@panix3.panix.com>
	<mailman.726.1190130940.2658.python-list@python.org>
	<fcot65$1us$1@panix3.panix.com>
Message-ID: <1i4nmjz.z9983sibdq42N%aleax@mac.com>

Aahz <aahz at pythoncraft.com> wrote:

> For that matter, there are plenty of people who are better known by some
> nickname that is not their legal name.

Yep.  For example, some people whose legal name is "Alessandro" (which
no American is ever going to be able to spell right -- ONE L, TWO S's,
NOT an X or a J instead, "DRO" ending rather than "DER", etc), might
choose to avoid the hassle and go by "Alex" (just to make up a case...).


Alex


From kay.schluehr at gmx.net  Sat Sep 22 09:58:57 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Sat, 22 Sep 2007 06:58:57 -0700
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <5lkbr8F8gic1U6@mid.uni-berlin.de>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<1190413322.962737.53900@r29g2000hsg.googlegroups.com>
	<1190414192.636397.146450@57g2000hsv.googlegroups.com>
	<1190443748.907702.154660@22g2000hsm.googlegroups.com>
	<7xlkazgpc5.fsf@ruckus.brouhaha.com>
	<1190447257.060479.141280@n39g2000hsh.googlegroups.com>
	<5lk2olF8gic1U5@mid.uni-berlin.de>
	<1190454275.282176.90830@k79g2000hse.googlegroups.com>
	<5lkbr8F8gic1U6@mid.uni-berlin.de>
Message-ID: <1190469537.393019.133070@k79g2000hse.googlegroups.com>

On Sep 22, 1:15 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Sat, 22 Sep 2007 02:44:35 -0700, Kay Schluehr wrote:
> > I checked out Io once and I disliked it. I expected Io's prototype OO
> > being just a more flexible variant of class based OO but Io couples a
> > prototype very closely to its offspring. When A produces B and A.f is
> > modified after production of B also B.f is modified.  A controls the
> > state of B during the whole lifetime of B. I think parents shall not
> > do this, not in real life and also not in programming language
> > semantics.
>
> Well it's like Python: inherited slots (attributes) are looked up in the
> ancestors.  It should be easy to override `Object clone` in Io, so all
> slots of the ancestor are shallow copied to the clone, but I guess this
> might break existing code.  At least for your own code you could introduce
> a `realClone` slot.
>
> Ciao,
>         Marc 'BlackJack' Rintsch

But in class based OO most relevant attributes are defined during
object construction and they can't be simply changed by setting a
class attribute. Later you often create new attributes as but on
object level. You do not overuse the object/class relationship to
broadcast changes to all objects. While you might override 'Object
clone' I don't believe changing the way how the whole object model
works is a good idea and since it happens on source level you will get
also a performance hit.



From ldo at geek-central.gen.new_zealand  Sun Sep  9 01:16:05 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sun, 09 Sep 2007 17:16:05 +1200
Subject: Python syntax wart
Message-ID: <fbvvil$7dj$1@lust.ihug.co.nz>

The one thing I don't like about Python syntax is using backslashes to
continue lines. Yes, you can avoid them if you can include parentheses
somehow, but this isn't always possible.

Possible:

    if (
            quitting
        and
            len(client["to_write"]) == 0
        and
            len(client["read"]) + client["to_read"] == 0
    ) :
        close_client(client, "shutting down")
    #end if

Not possible:

    for \
        Link \
    in \
        GetEachRecord \
          (
            "links",
            ("from_episode",),
            "to_episode = %s",
            [EpisodeID],
            "order by when_created"
          ) \
    :
        out.write \
          (
                "<P><A HREF=\"%s\">Back to episode %d</A>\n"
            %
                (
                    LinkToMe({"ep" : Link["from_episode"]}),
                    Link["from_episode"]
                )
          )
    #end for
 


From wdierkes at 5dollarwhitebox.org  Mon Sep 24 00:03:19 2007
From: wdierkes at 5dollarwhitebox.org (BJ Dierkes)
Date: Sun, 23 Sep 2007 23:03:19 -0500
Subject: Database Abstraction Layer And/Or ORM
Message-ID: <6AF3EAAD-55CB-4A0D-9B87-35D5D641F779@5dollarwhitebox.org>

Hello all,

I am looking for opinions on preferred methods of Database  
Abstraction Layer or Object Relation Mapper (I'm using Python 2.5).    
I have found a number of options such as those listed here:

http://wiki.python.org/moin/HigherLevelDatabaseProgramming


I'm not looking for a holy war based on whether a DAL/ORM *should* be  
used, and/or if it is preferred over direct access to the database  
API layer.  I understand that can be a lengthy discussion.  I would  
just like to see if there is a common 'preferred choice' in the  
area.  I am coding an application around SQLite, but need to keep the  
flexibility to allow the use of MySQL (or other).

Thoughts? 


From wanpor at 126.com  Sat Sep 15 09:55:25 2007
From: wanpor at 126.com (wanpor at 126.com)
Date: Sat, 15 Sep 2007 21:55:25 +0800 (CST)
Subject: how could change backcolor of console?
Message-ID: <46EBE44D.00006D.20377@bj126app37.126.com>

  Hi,everyone:     I am a c programmer,and want using Python instead of C
I  can  change backcolor using  C,like this:

?textbackground(color); 

How can I do in Python?


Best regards





? ? ? ??? ? ? ? 07 ? ? ? ? ? ? ? ? ? ? ? 
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From cjt22 at bath.ac.uk  Thu Sep  6 10:09:12 2007
From: cjt22 at bath.ac.uk (cjt22 at bath.ac.uk)
Date: Thu, 06 Sep 2007 07:09:12 -0700
Subject: startswith( prefix[, start[, end]])  Query
Message-ID: <1189087752.538726.101350@r29g2000hsg.googlegroups.com>

Hi

startswith( prefix[, start[, end]])  States:

Return True if string starts with the prefix, otherwise return False.
prefix can also be a tuple of suffixes to look for. However when I try
and add a tuple of suffixes I get the following error:

Type Error: expected a character buffer object

For example:

file = f.readlines()
for line in file:
    if line.startswith(("abc","df"))
        CODE

It would generate the above error

To overcome this problem, I am currently just joining individual
startswith methods
i.e. if line.startswith("if") or line.startswith("df")
but know there must be a way to define all my suffixes in one tuple.

Thanks in advance



From dotancohen at gmail.com  Sun Sep  9 20:13:52 2007
From: dotancohen at gmail.com (Dotan Cohen)
Date: Mon, 10 Sep 2007 03:13:52 +0300
Subject: Modul (%) in python not like in C?
In-Reply-To: <0W%Ei.14427$3x.11615@newssvr25.news.prodigy.net>
References: <880dece00709091201n449d4c2k31998a5d426de17d@mail.gmail.com>
	<46E4466C.2030303@sdf.lonestar.org>
	<mailman.296.1189366862.2658.python-list@python.org>
	<0W%Ei.14427$3x.11615@newssvr25.news.prodigy.net>
Message-ID: <880dece00709091713o604d9da4u701eca718c489005@mail.gmail.com>

On 10/09/2007, Bryan Olson <fakeaddress at nowhere.org> wrote:
> Not according to the C standard:
>
>      When integers are divided, the result of the / operator is
>      the algebraic quotient with any fractional part discarded.(87)
>      If the quotient a/b is representable, the expression
>      (a/b)*b + a%b shall equal a.
>      [...]
>      87) This is often called ''truncation toward zero''.
>
>      [International Standard ISO/IEC 9899:1999, Section 6.5.5
>      Multiplicative operators, Paragraph 6 and footnote 87]

This seems most logical to me. Turbo C is against the standard, then.

> > while Python is always consistent and returns positive remainders.
>
> Technically:
>
>      The modulo operator always yields a result with the same sign
>      as its second operand (or zero)
>
>      [http://docs.python.org/ref/binary.html]
>

Again, logical.

Dotan Cohen

http://what-is-what.com
http://gibberish.co.il


From joshua at eeinternet.com  Fri Sep 28 15:31:46 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Fri, 28 Sep 2007 11:31:46 -0800
Subject: GUI for viewing/editing python data structures?
References: <fdem52$gl6$1@sea.gmane.org>
	<18c1e6480709272340v13d36916r6d707d64759107cc@mail.gmail.com>
Message-ID: <fdjkr2$g4v$1@sea.gmane.org>

On Thursday 27 September 2007 22:40, David wrote:

> On 9/27/07, Joshua J. Kugler <joshua at eeinternet.com> wrote:
>> A while back, I seem to remember coming across a small program that could
>> view and edit python data structures via a nice expanding tree view.  I'm
>> now in need of something like that (to verify data is imported correctly
>> into a shelve file) and having a GUI would be much simpler than trying to
>> wade through the output of str(d) or repr(d).
>>
>> I've tried googling with the obvious keywords (gui (view OR edit) python
>> data structures) but t didn't get me anywhere.
>>
>> Pointers?
>>
> 
> non-gui alternatives: Try pprint module. Or output as yaml (external
> library) into a text file. You could also output as XML (using
> built-in python modules), save to file and then use Firefox or another
> XML gui to inspect it. I haven't done the latter before but it should
> work.

I may give those a try.  I was also looking at the editing aspect too.  But
that's a good start.

Thanks.

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE



From iclark at mail.ewu.edu  Fri Sep 14 18:38:11 2007
From: iclark at mail.ewu.edu (Ian Clark)
Date: Fri, 14 Sep 2007 15:38:11 -0700
Subject: subclass of integers
In-Reply-To: <fcervb$da5$1@sea.gmane.org>
References: <1189780201.692192.291010@k79g2000hse.googlegroups.com>
	<fcervb$da5$1@sea.gmane.org>
Message-ID: <fcf2gk$rtt$1@sea.gmane.org>

Ian Clark wrote:
> Mark Morss wrote:
>> I would like to construct a class that includes both the integers and
>> None.  I desire that if x and y are elements of this class, and both
>> are integers, then arithmetic operations between them, such as x+y,
>> return the same result as integer addition.  However if either x or y
>> is None, these operations return None.
>>
>> (snip)
>>
>> I would very much appreciate anyone's help.
> 
> My thought would be rather than trying to cram None into a subclass of 
> int, to use delegation instead...
> 
> (snip)
> 
> Ian

A more robust implementation that accounts for ints/longs as well as 
implementing more operations...

-----8<--------------------------------------------------
import operator

class NoneInt(object):
     _LEFT = 1
     _RIGHT = 2


     def __init__(self, value):
         self.value = value


     def _get_arguments(self, other, direction=_LEFT):
         """ Given a direction (left or right), returns the left hand
         side and right hand side values. """

         if direction == self._LEFT:
             lhs = self.value
             if isinstance(other, (int, long, type(None))):
                 rhs = other
             else:
                 rhs = other.value
         elif direction == self._RIGHT:
             rhs = self.value
             if isinstance(other, (int, long, type(None))):
                 lhs = other
             else:
                 lhs = other.value
         else:
             raise ValueError('direction must be either _LEFT or _RIGHT')
         return (lhs, rhs)


     def _operation(op, direction):
         """ Given a direction and an operation will return a function
         that calls the operation with the arguments in the correct
         order. """

         def func(self, other):
             if not isinstance(other, (int, long, NoneInt, type(None))):
                 fmt = "unsupported operand type(s) for %s: 'NoneInt' 
and '%s'"
                 args =  (op.__name__, other.__class__.__name__)
                 raise TypeError(fmt % args)

             lhs, rhs = self._get_arguments(other, direction)

             if None in (lhs, rhs):
                 return NoneInt(None)
             return NoneInt(op(lhs, rhs))
         return func


     __add__ = _operation(operator.add, _LEFT)
     __radd__ = _operation(operator.add, _RIGHT)
     __sub__ = _operation(operator.sub, _LEFT)
     __rsub__ = _operation(operator.sub, _RIGHT)
     __div__ = _operation(operator.div, _LEFT)
     __rdiv__ = _operation(operator.div, _RIGHT)
     __mul__ = _operation(operator.mul, _LEFT)
     __rmul__ = _operation(operator.mul, _RIGHT)
     # ... etc


     def __eq__(self, other):
         lhs, rhs = self._get_arguments(other)
         return lhs == rhs


     def __nonzero__(self):
         return bool(self.value)


     def __str__(self):
         return 'NoneInt(%s)' % str(self.value)

     __repr__ = __str__
-----8<--------------------------------------------------

Ian



From sajmikins at gmail.com  Wed Sep 26 13:19:20 2007
From: sajmikins at gmail.com (Simon Forman)
Date: Wed, 26 Sep 2007 10:19:20 -0700
Subject: Matplotlib TkAgg WindowsXP ImportError
Message-ID: <1190827160.282738.293770@k79g2000hse.googlegroups.com>

Hello,

I just installed Matplotlib (and NumPy) on a windows XP machine, and
I'm getting the following traceback when I try to use the TkAgg
backend.

Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit
(Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import matplotlib
>>> matplotlib.use('TkAgg')
>>> from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
 File "C:\Python25\Lib\site-packages\matplotlib\backends
\backend_tkagg.py",
line 8, in <module>
   import tkagg                 # Paint image to Tk photo blitter
extension
 File "C:\Python25\lib\site-packages\matplotlib\backends\tkagg.py",
line 1, in <module>
   import _tkagg
ImportError: DLL load failed: The specified module could not be found.
>>>

I found one old (2004) post
http://mail.python.org/pipermail/python-list/2004-April/258963.html
that seems to indicate that some sort version mismatch of the Tk/Tcl
libraries may be to blame.  But I don't know how to diagnose that or
what to do about it.

FWIW, I installed using matplotlib-0.90.1.win32-py2.5.exe and
numpy-1.0.3.1.win32-py2.5.exe.

Thanks in advance for any help.
Sincerely,
~Simon



From Summercoolness at gmail.com  Sun Sep 16 13:28:30 2007
From: Summercoolness at gmail.com (Summercool)
Date: Sun, 16 Sep 2007 17:28:30 -0000
Subject: where are the .pyc files?
Message-ID: <1189963710.714191.74440@n39g2000hsh.googlegroups.com>

so i have always heard of the .pyc files....  but for some reason i
don't see them on the Windows platform...  when i have a program
called  try.py  and after running it for ages, i still don't have a
try.pyc file in my folder even if i turn the "show hidden file" to on.



From hat at se-162.se.wtb.tue.nl  Wed Sep  5 04:09:21 2007
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Wed, 05 Sep 2007 10:09:21 +0200
Subject: Calling a matlab script from python
References: <1188978068.544030.158010@19g2000hsx.googlegroups.com>
Message-ID: <slrnfdsp1h.uo9.hat@se-162.se.wtb.tue.nl>

On 2007-09-05, n o s p a m p l e a s e <nospam.please at alum.com> wrote:
> Suppose I have a matlab script mymatlab.m. How can I call this script
> from a python script?

use the mlabwrap module

Albert


From bscrivener42 at gmail.com  Fri Sep  7 22:48:11 2007
From: bscrivener42 at gmail.com (BartlebyScrivener)
Date: Sat, 08 Sep 2007 02:48:11 -0000
Subject: Is a Borg rebellion possible? (a metaclass question)
In-Reply-To: <mailman.244.1189191248.2658.python-list@python.org>
References: <1189168282.665210.260840@19g2000hsx.googlegroups.com>
	<mailman.220.1189171663.2658.python-list@python.org>
	<1189180478.257790.60160@g4g2000hsf.googlegroups.com>
	<mailman.244.1189191248.2658.python-list@python.org>
Message-ID: <1189219691.136842.34900@57g2000hsv.googlegroups.com>

On Sep 7, 1:53 pm, Steve Holden <st... at holdenweb.com> wrote:

> All you really need is to create your SplinterBorgs with appropriate
> group names, you don't neef subclasses at all:
>

Dang. With that subject heading I thought this was about some post-
Singularity, Python-programmed cyborgs rising up to take over the
universe.

See, e.g.
<a href="http://www.amazon.com/How-Survive-Robot-Uprising-Defending/dp/
1582345929/inscape-20">How To Survive A Robot Uprising</a>

I am officially misled!

rd



From steve at holdenweb.com  Thu Sep 27 19:37:27 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 27 Sep 2007 19:37:27 -0400
Subject: Python 3.0 migration plans?
Message-ID: <fdhero$4vm$1@sea.gmane.org>

I wondered if a straw poll could get some idea of readers' thoughts 
about when they will be migrating to 3.0 on, so I used the new widget on 
Blogger to add a poll for that.

I'd appreciate if if you would go to

   http://holdenweb.blogspot.com/

and register your vote on your intended migration timescale.

Thanks!
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From steve at REMOVE-THIS-cybersource.com.au  Wed Sep 19 22:17:09 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Thu, 20 Sep 2007 02:17:09 -0000
Subject: Sets in Python
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
	<CeB*qHeVr@news.chiark.greenend.org.uk>
	<1190235483.412972.81280@v23g2000prn.googlegroups.com>
Message-ID: <13f3m15igkstq2e@corp.supernews.com>

On Wed, 19 Sep 2007 20:58:03 +0000, Karthik Gurusamy wrote:

> While it's easy to explain the behavior, I think the decision to dis-
> allow mutable items as keys is a bit arbitrary. There is no need for
> dict to recompute hash 

What???

Of course it does. How else can it look up the key? Because it (somehow) 
just recognizes that it has seen the key before? How? By magic?



> (first of all, a user doesn't even need to know
> if underneath 'hashing' is used -- the service is just a mapping between
> one item to another item).

The user doesn't need to know the mechanism, but the dict does. Dicts are 
implemented as hash tables. I suppose they could be implemented as 
something else (what? linear lists? some sort of tree?) but the same 
considerations must be made: the dict must be able to find keys it has 
seen before. How is the dict supposed to recognise the key if the key has 
changed?



> Since we know hashing is used, all that is needed is, a well-defined way
> to construct a hash out of a mutable. "Given a sequence, how to get a
> hash" is the problem. 

Nonsense. That's not the problem. The problem is how to get exactly the 
same hash when the sequence has changed.

In other words, if you have two mutable objects M1 and M2, then you 
expect:

hash(M1) == hash(M2) if and only if M1 and M2 are equal
hash(M1) != hash(M2) if M1 and M2 are unequal

but also:

if M1 mutates to become equal to M2, hash(M1) must remain the same while 
still being different from hash(M2).

That means that hash() now is a non-deterministic function. hash([1,2,3]) 
will vary according to how the list [1,2,3] was constructed!

Obviously something has to give, because not all of these things are 
mutually compatible.



> If later the given sequence is different, that's
> not the dict's problem.

Data structures don't have problems. Programmers do. And language 
designers with sense build languages that minimize the programmers 
problems, not maximize them.


> So if the list changes, it will result in a different hash and we will
> get a hash-miss. I doubt this is in anyway less intuitive than dis-
> allowing mutable items as keys.

The choices for the language designer are:

(1) Invent some sort of magical non-deterministic hash function which 
always does the Right Thing.

(2) Allow the hash of mutable objects to change, which means you can use 
mutable objects as keys in dicts but if you change them, you can no 
longer find them in the dict. They'll still be there, using up memory, 
but you can't get to them.

(3) Simply disallow mutable objects as keys.

Alternative 1 is impossible, as we've seen, because the requirements for 
the Right Thing are not mutually compatible.

Alternative (2) leads to hard-to-find, hard-to-diagnose bugs where you 
store objects in a dict only for them to mysteriously disappear later. 
Worse, it could lead to bugs like the following hypothetical:

>>> M = [1, 2, 3]
>>> D = {M: 'parrot'} # pretend this works
>>> D
{[1, 2, 3]: 'parrot'}
>>> M.append(4)
>>> D
{[1, 2, 3, 4]: 'parrot'}
>>> D[[1, 2, 3, 4]]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
KeyError: [1, 2, 3, 4]

Try explaining that one to programmers: they can SEE the key in the dict 
when they print it, but they can't get it or delete it because the hash 
has changed.

Alternative 3 is easy to deal with: simply don't use mutable objects as 
keys. That's what Python does. Sure, the programmer sometimes needs to 
work around the lack (convert the list into a tuple, or a string, or 
pickle it, whatever...) which on rare occasions is hard to do, but at 
least there are no mysterious, hard to track down bugs.


-- 
Steven.


From horpner at yahoo.com  Mon Sep 10 09:06:35 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Mon, 10 Sep 2007 13:06:35 GMT
Subject: Checking if elements are empty
References: <2323A6D37908A847A7C32F1E3662C80E010A0246@dc1ex01.air.org>
	<fbme5d$qa$1@sea.gmane.org>
	<mailman.93.1189003016.2658.python-list@python.org>
	<fbqedh$31g$1@lust.ihug.co.nz>
	<46e115e5$0$7691$9b4e6d93@newsspool2.arcor-online.net>
	<fbsqqs$efc$2@lust.ihug.co.nz>
	<46e2013a$0$7687$9b4e6d93@newsspool2.arcor-online.net>
Message-ID: <slrnfead5j.mo.horpner@FIAD06.norwich.edu>

On 2007-09-08, Wildemar Wildenburger <lasses_weil at klapptsowieso.net> wrote:
> Lawrence D'Oliveiro wrote:
>>>>> if y[0]:
>>>> Not a good idea.
>>> Why not?
>> 
>> Because there is a situation where your version of the test
>> will fail even if the first element of y is non-null.
>
> Such as? Seriously people, a little more verbosity wouldn't
> hurt here. This isn't a mystery game.

>>> if "": True
...
>>> if 0: True
...
>>> if []: True
...
>>> if {}: True
...
>>> if None: True
...

That's may not be all the possibilities. Lots of Python objects
can evaluate to false in a boolean context.

-- 
Neil Cerutti
The Pastor would appreciate it if the ladies of the congregation would lend
him their electric girdles for the pancake breakfast next Sunday morning.
--Church Bulletin Blooper


From steve at holdenweb.com  Fri Sep 28 15:54:48 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 28 Sep 2007 15:54:48 -0400
Subject: Python 3.0 migration plans?
In-Reply-To: <1191008702.579795.141180@r29g2000hsg.googlegroups.com>
References: <1191002679.569709.16870@22g2000hsm.googlegroups.com>	<mailman.1242.1191003389.2658.python-list@python.org>	<1191005906.556751.261940@22g2000hsm.googlegroups.com>	<5m51l4Fbao07U2@mid.uni-berlin.de>	<1191007754.740566.137510@n39g2000hsh.googlegroups.com>
	<1191008702.579795.141180@r29g2000hsg.googlegroups.com>
Message-ID: <46FD5C08.7070603@holdenweb.com>

George Sakkis wrote:
> On Sep 28, 3:29 pm, TheFlyingDutchman <zzbba... at aol.com> wrote:
> 
>> One issue I have with this group and that I encountered many years ago
>> in the Perl group is that there is no separate group
>> comp.lang.python.beginner where you can ask questions without getting
>> hit with RTFM! and the like.
> 
> Which shows once again that you're trying to break the world record of
> being wrong in as many sentences as possible:
> 
>     http://mail.python.org/mailman/listinfo/tutor
> 
> You would do yourself (and others) a favor by migrating there for a
> few weeks or months.
> 
> George
> 
Hopefully with a side dish of alt.attitude.adjustment.

It's not that we don't want you. it's just that you don't seem to 
realize how annoying you can be.

n the other hand, if you *do* realize how annoying you can be then 
please leave now and never come back ;-)

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From thomas at jollans.com  Sat Sep 22 11:53:09 2007
From: thomas at jollans.com (Thomas Jollans)
Date: Sat, 22 Sep 2007 17:53:09 +0200
Subject: can I run pythons IDLE from a command line??
In-Reply-To: <1190475878.971841.253140@k79g2000hse.googlegroups.com>
References: <1190475878.971841.253140@k79g2000hse.googlegroups.com>
Message-ID: <200709221753.09357.thomas@jollans.com>

On Saturday 22 September 2007, tedpottel at gmail.com wrote:
> Hi,
> Is their a version of pythons IDLE that will run in a dos command
> line?
> The reason is that I would like to be able to run python code
> interactively from my parable by connecting to my desktop using remote
> command line or a telnet program.

The Python interpreter should do fine. If your PATH environment variable is 
set up correctly, just run "python", otherwise it's somewhere in your Python 
installation directory.

-- 
      Regards,                       Thomas Jollans
GPG key: 0xF421434B may be found on various keyservers, eg pgp.mit.edu
Hacker key <http://hackerkey.com/>:
v4sw6+8Yhw4/5ln3pr5Ock2ma2u7Lw2Nl7Di2e2t3/4TMb6HOPTen5/6g5OPa1XsMr9p-7/-6


From bignose+hates-spam at benfinney.id.au  Tue Sep 25 04:41:54 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 25 Sep 2007 18:41:54 +1000
Subject: obtaining multiple values from a function.
References: <1190708155.683502.93040@r29g2000hsg.googlegroups.com>
Message-ID: <87sl53m90t.fsf@benfinney.id.au>

Shriphani <shriphanip at gmail.com> writes:

> If I have a function that loops over a few elements and is expected to
> throw out a few tuples as the output, then what should I be using in
> place of return ?

If it makes sense for the set of results to be returned all at once,
then return the object that collects them all together ? a list of
tuples, for example.


If, instead, it makes sense for the results to be iterated over, you
can write a function that yields results one at a time, without
necessarily knowing in advance what the entire set will be::

    >>> def fib(max_result):
    ...     """ Yield numbers in the Fibonacci sequence
    ...         to a maximum value of max_result. """
    ...     prev_results = [0, 0]
    ...     result = 1
    ...     while result < max_result:
    ...         yield result
    ...         prev_results = [prev_results[1], result]
    ...         result = sum(prev_results)
    ...

The function, when called, will return a generator object that you can
either iterate over::

    >>> fib_generator = fib(100)
    >>> for n in fib_generator:
    ...     print n
    ...
    1
    1
    2
    3
    5
    8
    13
    21
    34
    55
    89

or directly call its 'next' method to get one result at a time until
it raises a 'StopIteration' exception::

    >>> fib_generator = fib(5)
    >>> fib_generator.next()
    1
    >>> fib_generator.next()
    1
    >>> fib_generator.next()
    2
    >>> fib_generator.next()
    3
    >>> fib_generator.next()
    Traceback (most recent call last):
      File "<stdin>", line 1, in ?
    StopIteration

-- 
 \        "I have one rule to live by: Don't make it worse."  -- Hazel |
  `\                                                          Woodcock |
_o__)                                                                  |
Ben Finney


From gagsl-py2 at yahoo.com.ar  Tue Sep 25 23:12:58 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 26 Sep 2007 00:12:58 -0300
Subject: Invoking python through C++: How to?
References: <496954360709251010q159199a4h9dd2b0e2ecad7a01@mail.gmail.com>
Message-ID: <op.ty8q7watx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 25 Sep 2007 14:10:49 -0300, Robert Dailey <rcdailey at gmail.com>  
escribi?:

> I have a python script that I would like to invoke through my C++
> application. Does anyone know of a trivial way of doing this? Right now  
> the
> only idea I can come up with is using system("python myscript.py") in  
> C++.

If you don't want to "share" objects between Python and C++, that's the  
simplest way.
Or, look at the document "Extending and Embedding the Python Interpreter"  
<http://docs.python.org/ext/ext.html>

-- 
Gabriel Genellina



From mensanator at aol.com  Sun Sep 23 01:39:08 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: Sat, 22 Sep 2007 22:39:08 -0700
Subject: Getting rid of bitwise operators in Python 3?
In-Reply-To: <1190517836.766461.29570@g4g2000hsf.googlegroups.com>
References: <46f49740$0$32514$4c368faf@roadrunner.com>
	<miaJi.28220$eY.3184@newssvr13.news.prodigy.net>
	<1190484589.890198.266430@y42g2000hsy.googlegroups.com>
	<13fbahtem90fp99@corp.supernews.com>
	<1190506229.092718.41690@g4g2000hsf.googlegroups.com>
	<7xps0achlg.fsf@ruckus.brouhaha.com>
	<1190517836.766461.29570@g4g2000hsf.googlegroups.com>
Message-ID: <1190525948.525876.253420@57g2000hsv.googlegroups.com>

On Sep 22, 10:23?pm, richy... at gmail.com wrote:
> On Sep 22, 9:10 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
>
> > Certainly xgcd should be in the math library or somewhere similar.
>
> It does feel odd to have modular exponentiation in the core but no
> other number-theoretic stuff in core+libraries.  Perhaps a proposal on
> python-ideas is in order... Though it's not clear what else would be
> useful;

Greatest Common Denominator
Least Common Multiple
Modular Inverse
Linear Congruence

(all found in gmpy)

> primality testing

Also in gmpy.

> and factoring

Alas, not in gmpy. I work around that by using a
custom version I made of factor.exe from the MIRACL
library. Which, alas, doesn't work quite right and
which I would think is beyond my ability to fix.
But this can be fixed in the Python program I use
to capture the factors.

> are obvious candidates, but I
> don't much fancy writing an MPQS factorization algorithm in Python.
> Well okay, I take that back---I wouldn't mind *writing* it;  I just
> wouldn't expect to get much speed from *running* it.  Miller-Rabin
> probabilistic primality testing would be easy to implement though.
>
> Anyway, I'm getting way off-topic here... sorry.
>
>
>
> > Not necessarily.  See for examplehttp://trevp.net/tlslite
>
> Interesting.  Thanks for the link.
>
> Richard




From gagsl-py2 at yahoo.com.ar  Fri Sep  7 05:14:23 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 07 Sep 2007 06:14:23 -0300
Subject: unexpected behavior: did i create a pointer?
References: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>
Message-ID: <op.tx9099r4x6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 07 Sep 2007 05:07:03 -0300, gu <pistacchio at gmail.com> escribi?:

> after two days debugging my code, i've come to the point that the
> problem was caused by an unexpected behaviour of python. or by lack of
> some information about the program, of course! i've stripped down the
> code to reproduce the problem:
>
> <code>
> a = {}
>
> for x in range(10):
>      for y in range(10):
>          a[x,y] = "0"
>
> copyOfA = a

copyOfA is *NOT* a copy - it's just another name pointing to the SAME  
object as a.
Python will never copy anything unless told explicitely.

Read this <http://effbot.org/zone/python-objects.htm>

-- 
Gabriel Genellina



From horpner at yahoo.com  Wed Sep 26 11:28:53 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Wed, 26 Sep 2007 15:28:53 GMT
Subject: An Editor that Skips to the End of a Def
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk> <fd0au1$fro$1@lust.ihug.co.nz>
	<5lhs4pF8bkunU1@mid.individual.net> <fd4168$ige$1@lust.ihug.co.nz>
	<slrnfff9op.1is.horpner@FIAD06.norwich.edu>
	<fd9ncb$q3l$1@lust.ihug.co.nz>
	<slrnffhe9g.2db.hat@se-162.se.wtb.tue.nl>
	<fdcfci$brq$1@lust.ihug.co.nz>
	<mailman.1078.1190777151.2658.python-list@python.org>
Message-ID: <slrnffkodo.218.horpner@FIAD06.norwich.edu>

On 2007-09-26, Jason M Barnes <json.barnes at gmail.com> wrote:
> Off the top of my head, I can think of a few vim commands that
> have come in handy.  I can search through a webpage in Firefox
> by using the same '/' search command that vim has.  The
> movement keys (h,j,k,l) are the same as in any paging program
> I've ever used.  Not to mention that I learned regexes by
> learning 's/regex/replacement' first :-)

Yup. A huge advantge of learning vi is how much it helps improve
your nethack experience. ;) Ignorance was Emacs was an obstacle I
had to overcome in order to get into the Lisp world, though.

> That's my religion anyway ;-), but I thought this was a python
> mailing list ;-)

Vim has Python integration if you want to control it with Python
scripts. Cool! Of course, Vim needs such a capability more than
Emacs, which has the very cool elisp scripting language. I'm not
so keen on Vim's built-in scripting language.

-- 
Neil Cerutti


From fakeaddress at nowhere.org  Wed Sep  5 06:33:24 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Wed, 05 Sep 2007 03:33:24 -0700
Subject: creating really big lists
In-Reply-To: <87ejhd2zzt.fsf@rudin.co.uk>
References: <1188985838.661821.41530@k79g2000hse.googlegroups.com>
	<87ejhd2zzt.fsf@rudin.co.uk>
Message-ID: <NBvDi.1514$ZA5.1182@nlpi068.nbdc.sbc.com>

Paul Rudin wrote:
> Dr writes:
>> I would like to create a pretty big list of lists; a list 3,000,000
>> long, each entry containing 5 empty lists. My application will append
>> data each of the 5 sublists, so they will be of varying lengths (so no
>> arrays!).
>>
>> Does anyone know the most efficient way to do this? I have tried:
>>
>> list = [[[],[],[],[],[]] for _ in xrange(3000000)]
>>
>> but its not soooo fast. Is there a way to do this without looping?
> 
> You can do:
> 
>    [[[],[],[],[],[]]] * 3000000
> 
> although I don't know if it performs any better than what you already
> have.

Actually, that produces list of 3000000 references to the same
5-element list. A reduced example:

 >>> lst = [[[],[],[],[],[]]] * 3
 >>> lst[1][1].append(42)
 >>> print lst
[[[], [42], [], [], []], [[], [42], [], [], []], [[], [42], [], [], []]]


-- 
--Bryan


From kyosohma at gmail.com  Thu Sep 13 09:19:18 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 13 Sep 2007 06:19:18 -0700
Subject: wx.ToplevelWindow.SetIcon: Native MS Windows error dialog pops up
	in wxPython app, no exception raised, no stack trace
In-Reply-To: <mailman.479.1189682950.2658.python-list@python.org>
References: <mailman.479.1189682950.2658.python-list@python.org>
Message-ID: <1189689558.938858.43970@g4g2000hsf.googlegroups.com>

On Sep 13, 6:29 am, Laszlo Nagy <gand... at designaproduct.biz> wrote:
>   Hello,
>
> I wrote a small program that works uses wxPython. The same application
> works on Linux and Windows. When I start it from MS Windows, I see this
> error message appearing each time I open a window:
>
> ---------------------------
> Warehouseclient Error
> ---------------------------
> Can't load image from file '': file does not exist.
> ---------------------------
> OK
> ---------------------------
>
> The message box itself is a native MS Windows dialog. Otherwise the
> program works fine, just here is this annoying message. There is no
> exception raised in the Python program. Nothing printed on console. I
> figured out that this happens only when I set the icon of the window
> using this code:
>
> self.SetIcon(icon)
>
> However, the error dialog is not displayed right after the SetIcon call
> and no exception is raised. The dialog is displayed after __init__ has
> been called, and probably before EVT_SHOW gets called. Documentation of
> SetIcon
> (http://wxwidgets.org/manuals/stable/wx_wxtoplevelwindow.html#wxtoplev...)
> says that it is safe to delete the icon after calling this function. Now
> here are the wreid things:
>
> 1. The icon is displayed correctly in the left top corner, so where is
> the error?
> 2. The error message complains about a file. What has
> wx.ToplevelFrame.SetIcon do with files?
>
> I'm using: Windows XP Professional, Python 2.5, wxPython 2.8
>
> Thanks,
>
>    Laszlo

Normally I would recommend posting to the wxPython list, but it's down
at the moment. Keep an eye on their website as I'm sure they'll let
the community know when it's back up.

In the meantime, I'd look at how the demo does the icon displaying. It
looks like they created the icon they use using the img2py script
which basically creates a python file representation of the image.

See main.py of the Demo, line 1129. img2py is in the following default
location:
C:\Python24\Lib\site-packages\wx-2.8-msw-unicode\wxPython\tools

Without seeing how you create the image, it's hard to troubleshoot,
but I would guess that you have an absolute path that you're using in
your script that is different than what the exe is looking for.

Mike



From istvan.albert at gmail.com  Fri Sep  7 14:58:06 2007
From: istvan.albert at gmail.com (Istvan Albert)
Date: Fri, 07 Sep 2007 18:58:06 -0000
Subject: Speed of Python
In-Reply-To: <mailman.230.1189183406.2658.python-list@python.org>
References: <mailman.230.1189183406.2658.python-list@python.org>
Message-ID: <1189191486.253328.269220@50g2000hsm.googlegroups.com>

On Sep 7, 12:42 pm, "wang frank" <f... at hotmail.co.jp> wrote:

> Is my conclusion correct that Python is slower than matlab?

There are ways to speed up code execution, but to see substantial
improvement you'll need to use numpy and rework the code to operate
on  vectors/matrices rather than building the result one step at the
time. This applies to Octave as well. See the example code at the end
of the message.

With that code computing 1 million logarithms showed the following
tendency

original => 648.972728 msec per pass
optimized => 492.613773 msec per pass
with numpy => 120.578616 msec per pass

The "slowness of python in this example mainly comes from the function
call (math.log) as it seems about 30% of the runtime is spent calling
the function.

import timeit

setup = """
import math
from  numpy import arange, log
size = 1000
"""

code1 = """
#original code
for i in range(size):
    for j in range(size):
        a = math.log(j+1)
"""

code2 = """
# minor improvements lead to 15% faster speed
from math import log
for i in xrange(size):
    for j in xrange(size):
        a = log(j+1)
"""

code3 = """
# applying via a universal function makes it 5 times faster
for i in xrange(size):
    nums = arange( size )
    a = log( nums + 1)
"""

N = 3
codes = [ code1, code2, code3 ]

for stmt in codes:
    timer = timeit.Timer(stmt=stmt, setup=setup)
    msec  = 1000.0 * timer.timeit(number=N)/N
    print "%f msec per pass" % msec



From dandolls at yahoo.co.in  Sat Sep 22 07:43:14 2007
From: dandolls at yahoo.co.in (Amit Kumar Saha)
Date: Sat, 22 Sep 2007 17:13:14 +0530
Subject: Writing Object Data to Disk
In-Reply-To: <mailman.3168.1190445604.2656.python-list@python.org>
References: <mailman.3168.1190445604.2656.python-list@python.org>
Message-ID: <1190461394.6587.4.camel@ubuntu-laptop>

> > From: Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand>
> > In message <mailman.914.1190444082.2658.python-list at python.org>,
> > Amit Kumar
> > Saha wrote:
> > 
> > > I would like to know if "Pickling" the class object is the only
> > way of
> > > writing it to disk for persistent storage.
> > 
> > Wouldn't it be better to use a language-independent data
> > representation that
> > wasn't tied to Python? Also tying your external data representation
> > to your
> > internal program structure (objects) makes it harder to change the
> > program
> > in future.

Actually, language independence is really not a consideration here. I am
happy at having it tied to Python :-)

BTW, do we have something like array of objects here? 
-- 
Amit Kumar Saha
me blogs@ http://amitksaha.blogspot.com
URL:http://amitsaha.in.googlepages.com




From bj_666 at gmx.net  Sat Sep 22 02:39:17 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 22 Sep 2007 06:39:17 GMT
Subject: I could use some help making this Python code run faster using
	only Python code.
References: <1190325588.608625.259800@q3g2000prf.googlegroups.com>
	<1190328413.226577.206740@k79g2000hse.googlegroups.com>
	<1190330015.131971.265680@y42g2000hsy.googlegroups.com>
	<1190357165.381313.197910@19g2000hsx.googlegroups.com>
	<Xns99B25B0334892duncanbooth@127.0.0.1>
	<1190394011.148384.106280@q3g2000prf.googlegroups.com>
	<mailman.897.1190412168.2658.python-list@python.org>
	<1190417120.723579.267560@22g2000hsm.googlegroups.com>
Message-ID: <5ljrklF8gic1U3@mid.uni-berlin.de>

On Fri, 21 Sep 2007 16:25:20 -0700, Python Maniac wrote:

> On Sep 21, 3:02 pm, "Matt McCredie" <mccre... at gmail.com> wrote:
>
>> Isn't D compiled to machine code? I would expect it to win hands down.
>> That is, unless it is horribly unoptimized.
>>
>>
> Well D code is compiled into machine code that runs via a VM.

About which D are we talking here?  Not digital mars' successor to C++,
right!?

Ciao,
	Marc 'BlackJack' Rintsch


From zzbbaadd at aol.com  Sat Sep 22 23:24:48 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Sat, 22 Sep 2007 20:24:48 -0700
Subject: An Editor that Skips to the End of a Def
In-Reply-To: <e8HIi.3303$4J3.1378@newssvr22.news.prodigy.net>
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk>
	<tfAIi.51111$Um6.44314@newssvr12.news.prodigy.net>
	<YPGIi.54591$YL5.26012@newssvr29.news.prodigy.net>
	<874phou1pa.fsf@benfinney.id.au>
	<e8HIi.3303$4J3.1378@newssvr22.news.prodigy.net>
Message-ID: <1190517888.875672.18650@50g2000hsm.googlegroups.com>

On Sep 20, 8:47 pm, "W. Watson" <wolf_tra... at invalid.com> wrote:
> How about in the case of MS Win?
>
Try Wing IDE at http://www.wingware.com. It can run and debug programs
and has a free version.



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Sep 17 10:59:14 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 17 Sep 2007 16:59:14 +0200
Subject: Python "with"
In-Reply-To: <13et3kv409e355d@corp.supernews.com>
References: <fck2di$7to$1@ss408.t-com.hr> <fcleos$2rt$1@news2.u-psud.fr>
	<fclikb$blt$1@news2.carnet.hr> <fclom8$8h6$1@news2.u-psud.fr>
	<13et3kv409e355d@corp.supernews.com>
Message-ID: <46ee9640$0$9002$426a74cc@news.free.fr>

Grant Edwards a ?crit :
> On 2007-09-17, Laurent Pointal <laurent.pointal at limsi.fr> wrote:
> 
>> Note3: Its funny to see how Python users tries to change the language, 
>> does this occure with C, C++, Java, C# ?
> 
> Yes.  I remember somebody I worked with once who write a C
> program using a whole pile of macros to make it look like BASIC:
> 
> #define IF  if (
> #define THEN ) {
> #define ELSE } else {
> #define ENDIF }
> 
> and so on...

FWIW and IIRC, one of the rationales for C preprocessor macros was to 
let Pascal programmers make C looks like Pascal !-)


From maly.bzyczek at gmail.com  Wed Sep 19 07:47:39 2007
From: maly.bzyczek at gmail.com (Bzyczek)
Date: Wed, 19 Sep 2007 04:47:39 -0700
Subject: UTF-8 characters in doctest
Message-ID: <1190202459.229197.297350@n39g2000hsh.googlegroups.com>

Hello,
I have problems with running doctests if I use czech national
characters in UTF-8 encoding.

I have Python script, which begin with encoding definition:

# -*- coding: utf-8 -*-

I have this function with doctest:

def get_inventary_number(block):
    """
        >>> t = u'''28. ?esk? kr?lovsk? insignie
        ... m?dirytina, grafika je zcela vy?ez?na z pap?ru - max.
rozm?r
        ... 420?582 nezna?eno
        ... text: opis v lev?m medailonu: CAROL VI IMP.ELIS.CHR. AVG.
P.P.'''
        >>> get_inventary_number(t)
        (u'nezna\xc4\x8deno', u'28. \xc4\x8cesk\xc3\xa9 kr\xc3\xa1lovsk
\xc3\xa9 insignie\nm\xc4\x9bdirytina, grafika je zcela vy\xc5\x99ez
\xc3\xa1na z pap\xc3\xadru \xe2\x80\x93 max. rozm\xc4\x9br
\n420\xc3\x97582 \ntext: opis v lev\xc3\xa9m medailonu: CAROL VI
IMP.ELIS.CHR. AVG. P.P.')
    """
    m = RE_INVENTARNI_CISLO.search(block)
    if m: return m.group(1), block.replace(m.group(0), '')
    else: return None, block

After running doctest.testmod() I get this error message:

  File "vizovice_03.py", line 417, in ?
    doctest.testmod()
  File "/usr/local/lib/python2.4/doctest.py", line 1841, in testmod
    for test in finder.find(m, name, globs=globs,
extraglobs=extraglobs):
  File "/usr/local/lib/python2.4/doctest.py", line 851, in find
    self._find(tests, obj, name, module, source_lines, globs, {})
  File "/usr/local/lib/python2.4/doctest.py", line 910, in _find
    globs, seen)
  File "/usr/local/lib/python2.4/doctest.py", line 895, in _find
    test = self._get_test(obj, name, module, globs, source_lines)
  File "/usr/local/lib/python2.4/doctest.py", line 985, in _get_test
    filename, lineno)
  File "/usr/local/lib/python2.4/doctest.py", line 602, in get_doctest
    return DocTest(self.get_examples(string, name), globs,
  File "/usr/local/lib/python2.4/doctest.py", line 616, in
get_examples
    return [x for x in self.parse(string, name)
  File "/usr/local/lib/python2.4/doctest.py", line 577, in parse
    (source, options, want, exc_msg) = \
  File "/usr/local/lib/python2.4/doctest.py", line 648, in
_parse_example
    lineno + len(source_lines))
  File "/usr/local/lib/python2.4/doctest.py", line 732, in
_check_prefix
    raise ValueError('line %r of the docstring for %s has '
ValueError: line 17 of the docstring for __main__.get_inventary_number
has inconsistent leading whitespace: 'm\xc4\x9bdirytina, grafika je
zcela vy\xc5\x99ez\xc3\xa1na z pap\xc3\xadru \xe2\x80\x93 max. rozm
\xc4\x9br'

I try to fill expected output in docstring according to output from
Python shell, from doctest (if I bypass it in docstring, doctest says
me what he expect and what it get), I try to set variable t as t='some
text' together t=u'some unicode text'. But everything fails.

So my question is: Is it possible to run doctests with UTF-8
characters? And if your answer will be YES, tell me please how...

Thank you for any advice.


Regards
Michal



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Sep 14 19:59:48 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sat, 15 Sep 2007 01:59:48 +0200
Subject: Https conversation - debug?
References: <1189799482.314951.238470@r34g2000hsd.googlegroups.com>
Message-ID: <5l0ljkF5lfd3U1@mid.individual.net>

Johny wrote:

> Is there any good sniffer for https protocol?

Yes.

> How can be watched https conversation?

As a matter of principle, with every working sniffer. I'd use
wireshark's "follow TCP stream" function.

Regards,


Bj?rn

-- 
BOFH excuse #198:

Post-it Note Sludge leaked into the monitor.



From slinkp at gmail.com  Tue Sep 11 10:47:11 2007
From: slinkp at gmail.com (slinkp)
Date: Tue, 11 Sep 2007 07:47:11 -0700
Subject: Python 2 releases after 2.6
Message-ID: <1189522031.823544.111670@k79g2000hse.googlegroups.com>

This seems to be a bit of a FAQ (at least among worried Zope
developers  :-) ...
What  are the plans for Python 2 releases after Python 2.6 / Python 3
are released?

First, in the 2006 State of Python, Guido said:

"""
# 2.7: likely; may contain some 3.0 backports
# 2.9 is as far as we'll go (running out of digits :-)
"""

Then there's PEP 3000, which says:
"""
I expect that there will be parallel Python 2.x and 3.x releases for
some time; the Python 2.x releases will continue for a longer time
than the traditional 2.x.y bugfix releases. Typically, we stop
releasing bugfix versions for 2.x once version 2.(x+1) has been
released. But I expect there to be at least one or two new 2.x
releases even after 3.0 (final) has been released, probably well into
3.1 or 3.2. This will to some extent depend on community demand for
continued 2.x support, acceptance and stability of 3.0, and volunteer
stamina.
"""

Has any of that changed (insofar as anyone can predict the future of
course)?

Thanks,

-PW



From erik at myemma.com  Thu Sep 27 13:29:08 2007
From: erik at myemma.com (Erik Jones)
Date: Thu, 27 Sep 2007 12:29:08 -0500
Subject: True of False
In-Reply-To: <5m254hFatlbuU2@mid.uni-berlin.de>
References: <1190910814.594559.30880@n39g2000hsh.googlegroups.com>
	<5m254hFatlbuU2@mid.uni-berlin.de>
Message-ID: <EE500D79-5D26-4543-A1CB-A82B3799D8BD@myemma.com>


On Sep 27, 2007, at 11:47 AM, Marc 'BlackJack' Rintsch wrote:

> On Thu, 27 Sep 2007 09:33:34 -0700, koutoo wrote:
>
>> I tried writing a true and false If statement and didn't get
>> anything?  I read some previous posts, but I must be missing
>> something.  I just tried something easy:
>>
>> a = ["a", "b", "c", "d", "e", "f"]
>>
>> if "c" in a == True:
>>      Print "Yes"
>>
>> When I run this, it runs, but nothing prints.  What am I doing wrong?
>
> Wow that's odd:
>
> In [265]: a = list('abcdef')
>
> In [266]: a
> Out[266]: ['a', 'b', 'c', 'd', 'e', 'f']
>
> In [267]: 'c' in a
> Out[267]: True
>
> In [268]: 'c' in a == True
> Out[268]: False
>
> In [269]: ('c' in a) == True
> Out[269]: True
>
> In [270]: 'c' in (a == True)
> ---------------------------------------------------------------------- 
> -----
> <type 'exceptions.TypeError'>             Traceback (most recent  
> call last)
>
> /home/bj/<ipython console> in <module>()
>
> <type 'exceptions.TypeError'>: argument of type 'bool' is not iterable
>
>
> What's going on there?

That is weird.  Given 270, what's happening in 268.

Erik Jones

Software Developer | Emma?
erik at myemma.com
800.595.4401 or 615.292.5888
615.292.0777 (fax)

Emma helps organizations everywhere communicate & market in style.
Visit us online at http://www.myemma.com




From aisaac at american.edu  Sun Sep  2 12:14:12 2007
From: aisaac at american.edu (Alan Isaac)
Date: Sun, 02 Sep 2007 16:14:12 GMT
Subject: create Powerpoint via com
In-Reply-To: <1188500822.869925.194430@e9g2000prf.googlegroups.com>
References: <j7EBi.13372$Yg.7724@trnddc02>
	<1188500822.869925.194430@e9g2000prf.googlegroups.com>
Message-ID: <ojBCi.640$6T5.474@trnddc06>

Well, my needs were very limited so the
result is too, but in case someone else
just needs to get started:
http://econpy.googlecode.com/svn/trunk/utilities/mso.py

Comments, suggestions, additions welcom.

Alan Isaac


From hatspin at gmail.com  Thu Sep 13 06:37:58 2007
From: hatspin at gmail.com (hatspin at gmail.com)
Date: Thu, 13 Sep 2007 10:37:58 -0000
Subject: Can You Program?
Message-ID: <1189679878.271415.88700@w3g2000hsg.googlegroups.com>

We are offering $2000 USD for the best website developed with www.hatspin.com

Are you up to it??



From exhuma at gmail.com  Fri Sep  7 04:24:40 2007
From: exhuma at gmail.com (exhuma.twn)
Date: Fri, 07 Sep 2007 01:24:40 -0700
Subject: Changing data in an QAbstractListModel
In-Reply-To: <1189118539.748092.250140@g4g2000hsf.googlegroups.com>
References: <1189095176.973314.227720@r29g2000hsg.googlegroups.com>
	<1189118539.748092.250140@g4g2000hsf.googlegroups.com>
Message-ID: <1189153480.760570.273800@r34g2000hsd.googlegroups.com>

On Sep 7, 12:42 am, Jonathan Gardner
<jgardner.jonathangardner.... at gmail.com> wrote:
> On Sep 6, 9:12 am, "exhuma.twn" <exh... at gmail.com> wrote:
>
> > I defined a simple "update" method in the model which I call on
> > certain events to fetch the new data in the DB. I tried to "emit" the
> > "dataChanged()" signal of the Model without success. I don't know
> > where I should get the two required "index" parameters from.
>
> > Any hints?
>
> Shouldn't the index method give you the indexes you need?

Right... The update method now looks like this:

   def update(self):
      c = db_con.cursor()
      # SELECT only the most recent entry for each company
      c.execute("SELECT DISTINCT ON (unit_id) nom FROM unit ORDER BY
unit_id, year DESC")
      for unit in c.fetchall():
         self.__units.append( unit[0] )
      c.close()

      si = self.index(0)
      se = self.index(len(self.__units)-1)

      self.emit(Signal("dataChanged()"), si, se)


Still, nothing is happening when I call this method. Do I still need
to handle the "dataChanged" signal somehow? Or does the ListView take
care of this?



From see.signature at no.spam  Thu Sep 27 04:45:14 2007
From: see.signature at no.spam (Eric Brunel)
Date: Thu, 27 Sep 2007 10:45:14 +0200
Subject: Tkinter / Tk 8.5
References: <pan.2007.09.26.20.31.31.424223@vscht.cz>
	<13fm60kbhr28fa8@corp.supernews.com>
Message-ID: <op.tza09o0qwepdt4@ericb.pragmadev>

On Thu, 27 Sep 2007 04:41:48 +0200, Scott David Daniels  
<Scott.Daniels at Acm.Org> wrote:

> Michal Bozon wrote:
>> Today has been released a first beta of Tk 8.5, including a Ttk
>> (tile) style engine, which makes possible the native look
>> of widgets on MS platform, without having to install any extension.
>>  Is there a chance it will be included in 2.5.x, 2.6 or 3.0 ?
>
> This is just a guess, but:
>     The beta: no way for anything.
>     2.5.x: also very unlikely
>     2.6: unlikely unless release is _soon_ (first alpha of 2.6 is out)

It won't be: tcl/tk development is quite slow. There have been several  
months between each 5 or 6 alpha release and between the last alpha and  
the beta. So don't expect the official release to come soon...

>     3.0: much more likely, 3.0 won't be out for some time.

This would be my guess too...
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From koutoo at hotmail.com  Wed Sep 26 16:25:11 2007
From: koutoo at hotmail.com (koutoo at hotmail.com)
Date: Wed, 26 Sep 2007 13:25:11 -0700
Subject: Delete values from a string using the index
Message-ID: <1190838311.630506.64670@y42g2000hsy.googlegroups.com>

How do I delete or remove values from a list or string using the
index.

If a = [1,2,3,4,5,6,7,8] and I want to get rid of 1 -5, how would I do
that?

Thanks.



From openopt at ukr.net  Sun Sep  2 02:21:21 2007
From: openopt at ukr.net (dmitrey)
Date: Sat, 01 Sep 2007 23:21:21 -0700
Subject: howto compile recursively all *.py files to *.pyc (from a directory
	my_dir)?
Message-ID: <1188714081.476816.310350@50g2000hsm.googlegroups.com>

howto compile recursively all *.py files to *.pyc (from a directory
my_dir)?
Thank you in advance, D.



From puredata at 11h11.com  Sun Sep 30 22:56:02 2007
From: puredata at 11h11.com (patrick)
Date: Sun, 30 Sep 2007 22:56:02 -0400
Subject: call for collaboration (python / freesound)
Message-ID: <470061C2.4000009@11h11.com>

hi,

i have an idea, who doesn't have?

the technologies required:
    gtk+
    glade
    gobject
    Queue
    threading
    gstreamer (GNonLin)
    config

here's the result of my week-end trying to understand how it's working:
http://www.workinprogress.ca/pd/freesound.png

the idea is to make a bridge from python to freesound:
http://freesound.iua.upf.edu/

here's the class i used:
http://www.leonard-ritter.com/freesound_integration

there's some already solutions, but they are linked to an application:
http://www.jokosher.org/screenshots
http://trac.zeitherrschaft.org/aldrin/wiki/AldrinScreenshots

if anybody is interested into "working / helping" on this project, i 
would be very happy.

cheers guys,
pat




From piet at cs.uu.nl  Tue Sep 11 04:22:58 2007
From: piet at cs.uu.nl (Piet van Oostrum)
Date: Tue, 11 Sep 2007 10:22:58 +0200
Subject: Checking if elements are empty
References: <2323A6D37908A847A7C32F1E3662C80E010A0246@dc1ex01.air.org>
	<fbme5d$qa$1@sea.gmane.org>
	<mailman.93.1189003016.2658.python-list@python.org>
	<fbqedh$31g$1@lust.ihug.co.nz>
	<46e115e5$0$7691$9b4e6d93@newsspool2.arcor-online.net>
	<fbsqqs$efc$2@lust.ihug.co.nz>
	<46e2013a$0$7687$9b4e6d93@newsspool2.arcor-online.net>
	<slrnfead5j.mo.horpner@FIAD06.norwich.edu>
	<mailman.321.1189434264.2658.python-list@python.org>
	<slrnfeaoed.b4.horpner@FIAD06.norwich.edu>
	<mailman.329.1189439834.2658.python-list@python.org>
Message-ID: <m2hcm1lifx.fsf@koshka.cs.uu.nl>

>>>>> "Chris Mellon" <arkanes at gmail.com> (CM) wrote:

>CM> On 9/10/07, Neil Cerutti <horpner at yahoo.com> wrote:

>>> Agreed; but I prefer 'if y[0] == ""', absent more context and
>>> better names.

>CM> Probably should use u"" if you're going to take that route, as this
>CM> will fail spuriously if y[0] contains a unicode string that can't be
>CM> implicitly converted to ascii. Personally, I prefer the boolean check
>CM> and I'll let operations fail elsewhere if there's a type mismatch.

>>> x=u"?"
>>> x == ""
False
>>> 

-- 
Piet van Oostrum <piet at cs.uu.nl>
URL: http://www.cs.uu.nl/~piet [PGP 8DAE142BE17999C4]
Private email: piet at vanoostrum.org


From anuraguniyal at gmail.com  Fri Sep 28 03:26:39 2007
From: anuraguniyal at gmail.com (Anurag)
Date: Fri, 28 Sep 2007 07:26:39 -0000
Subject: marshal bug?
In-Reply-To: <mailman.1209.1190963523.2658.python-list@python.org>
References: <1190961020.258850.215130@g4g2000hsf.googlegroups.com>
	<mailman.1209.1190963523.2658.python-list@python.org>
Message-ID: <1190964399.196877.299630@19g2000hsx.googlegroups.com>

Thanks for the reply.

It seems problem is due to
"""
Any string in Python can be "interned" or not, the difference being
how/where the value is stored internally.  The marshal module includes
such information in its output.  What you are doing is probably
considered a misuse of the marshal module.  I'd suggest using the
pickle
(or cPickle) modules instead.
"""
as mentioned by Gary Herron

Now is there a easy way to by pass it (hack around it)
I tried various options but all fail e.g.
i= 123; marshal.dumps("%d"%123) != marshal.dumps("%d"%i)

So maybe I have to change all my code to use pickle, which also
consumes for memory per string.




From ptmcg at austin.rr.com  Wed Sep 26 22:20:49 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Wed, 26 Sep 2007 19:20:49 -0700
Subject: Using closures and partial functions to eliminate redundant code
In-Reply-To: <N9EKi.37131$RX.19410@newssvr11.news.prodigy.net>
References: <N9EKi.37131$RX.19410@newssvr11.news.prodigy.net>
Message-ID: <1190859649.250300.74740@o80g2000hse.googlegroups.com>

On Sep 26, 9:01 pm, Matthew Wilson <m... at tplus1.com> wrote:
> I wrote some code to create a user and update a user on a remote box by
> sending emails to that remote box.  When I was done, I realized that my
> create_user function and my update_user function were effectively
> identical except for different docstrings and a single different value
> inside:
>
>     ### VERSION ONE
>
>     def create_user(username, userpassword, useremail):
>         "Send an email that will create a user in the remote system."
>
>         # Build email
>         email_body = """
>     USERNAME = %s
>     USERPASSWORD = %s
>     USEREMAIL = %s
>     """ % (username, userpassword, useremail)
>
>         # send it.
>         send_email(subject="CREATE", body=email_body)
>
>     def update_user(username, userpassword, useremail):
>         "Send an email that will update a user's password in the remote system."
>
>         # Build email
>         email_body = """
>     USERNAME = %s
>     USERPASSWORD = %s
>     USEREMAIL = %s
>     """ % (username, userpassword, useremail)
>
>         # send it.
>         send_email(subject="UPDATE", body=email_body)
>
>     ### END
>
> Then I came up with this approach to avoid all that redundant text:
>
>     ### VERSION TWO
>
>     def _f(mode):
>
>         if mode not in ("create", "update"):
>             raise ValueError("mode must be create or update!")
>
>         def _g(username, userpassword, useremail):
>
>             # Build email
>             email_body = """
>         USERNAME = %s
>         USERPASSWORD = %s
>         USEREMAIL = %s
>         """ % (username, userpassword, useremail)
>
>             # send it.  
>             send_email(subject=mode.upper(), body=email_body)
>
>         # Seems goofy, but other ways are there?
>
>         docstrings = {'create': "Send an email that will create a user in the remote system.",
>                       'update': "Send an email that will update a user's password in the remote system."}
>
>         _g.__doc__ = docstrings[mode]
>
>         return _g
>
>     # Then I created my functions like this:
>
>     v2_create_user = _f("create")
>     v2_update_user = _f("update")
>
>     ### END
>
> Finally, I came up with this approach:
>
>     ### VERSION THREE
>
>     from functools import partial
>
>     def _h(mode, username, userpassword, useremail):
>
>         if mode not in ("create", "update"):
>             raise ValueError("mode must be create or update!")
>
>         # Build email
>         email_body = """
>     USERNAME = %s
>     USERPASSWORD = %s
>     USEREMAIL = %s
>     """ % (username, userpassword, useremail)
>
>         # send it.  
>         send_email(subject=mode.upper(), body=email_body)
>
>     # I can't figure out how to set up the docstring on these.
>
>     v3_create_user = partial(_h, mode="create")
>     v3_update_user = partial(_h, mode="update")
>
>     ### END
>
> I'm interested to hear how other people deal with really similar code.
> The similarity just bugs me.  However, I wonder if using stuff like
> closures or partial function application is needlessly showy.
>
> Also, I hope anyone here can help me figure out how to attach a
> meaningful docstring for my version three code.
>
> Thanks in advance!
>
> Matt

Haven't used partial yet, but I'm very interested.  Of course, I think
this will work just as well:

def make_method(mode,docstring):
    def _inner(username, userpassword, useremail):
        # implementation of common routine code goes here
        # note: no need to clutter arg list with 'mode' now
    _inner.__name__ = mode + "_user"
    _inner.__doc__ = docstring
    return _inner

Does this not work?

    v3_create_user = partial(_h, mode="create")
    v3_create_user.__doc__ = "Send an email that will create a user in
the remote system."
    v3_update_user = partial(_h, mode="update")
    v3_update_user.__doc__ = "Send an email that will update a user's
password in the remote system."


-- Paul



From deets at nospam.web.de  Sun Sep  2 04:22:55 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 02 Sep 2007 10:22:55 +0200
Subject: How best to dynamically define methods (and functions)?
In-Reply-To: <mailman.288.1188704597.28954.python-list@python.org>
References: <mailman.288.1188704597.28954.python-list@python.org>
Message-ID: <5jva77F1cgp6U1@mid.uni-berlin.de>

Kenneth McDonald schrieb:
> I can see an obvious but hacky way to define a Python function at 
> runtime. I can't see any obvious way to add a method to a class at 
> runtime (though I'm sure one could do just about anything by digging 
> into the metaclass stuff, which I will do if needed). But pointers to 
> cleaner or easier existing ways to do this would be most appreciated.
> 
> In case it's of interest in the context of the question, I need to 
> define a largish set of functions (and similar methods) that define a 
> XML-type markup language. Most of these functions will just be of the form
> 
> def fun(...):
>    return Node('fun', ...)
> 
> so it'd definitely be nice to just create most of them automatically, 
> and only do the special cases by hand.

Then don't do it that way, but use __getattr__. It will exactly do what 
you want:


class Foo(object):
    def __getattr__(self, name):
        return Node(name, ....)


    def some_node(self):
        ... # hand coded stuff


Diez


From __peter__ at web.de  Fri Sep  7 07:49:43 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 7 Sep 2007 13:49:43 +0200
Subject: unexpected behavior: did i create a pointer?
References: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>
	<46e11dfe$0$4517$9b4e6d93@newsspool3.arcor-online.net>
	<pan.2007.09.07.10.40.46@REMOVE.THIS.cybersource.com.au>
Message-ID: <fbrdsm$5f3$01$1@news.t-online.com>

Am Fri, 07 Sep 2007 10:40:47 +0000 schrieb Steven D'Aprano:

> Python doesn't have any pointers.

Thinking of python variables or "names" as pointers should
get you a long way when trying to understand python's behaviour.

As long as you keep in mind that python doesn't have pointers to pointers,
and no pointer arithmetic either...

Peter


From steve at holdenweb.com  Wed Sep 26 18:52:17 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 26 Sep 2007 18:52:17 -0400
Subject: setuptools without unexpected downloads
In-Reply-To: <1190840682.716950.131830@r29g2000hsg.googlegroups.com>
References: <87ejgmklep.fsf@benfinney.id.au><5lumarFae888U1@mid.uni-berlin.de>	<1190802526.695391.326220@n39g2000hsh.googlegroups.com>	<5lurorFa92euU1@mid.uni-berlin.de>	<1190805012.275901.227570@57g2000hsv.googlegroups.com>	<5luv0iFaai82U1@mid.uni-berlin.de>	<1190808836.056298.232640@57g2000hsv.googlegroups.com>	<fddivk$f90$1@sea.gmane.org>	<mailman.1111.1190813942.2658.python-list@python.org>
	<1190840682.716950.131830@r29g2000hsg.googlegroups.com>
Message-ID: <fdenr0$l49$1@sea.gmane.org>

kyosohma at gmail.com wrote:
> On Sep 26, 8:30 am, Steve Holden <st... at holdenweb.com> wrote:
>> Fredrik Lundh wrote:
>>> Paul Boddie wrote:
>>>> P.S. Of course, the package maintainer problem manifests itself most
>>>> prominently on Windows where you often see people asking for pre-built
>>>> packages or installers.
>>> for the record, I'd love to see a group of volunteers doing stuff like
>>> this for Windows.  there are plenty of volunteers that cover all major
>>> Linux/*BSD distributions (tons of thanks to everyone involved in this!),
>>> but as far as I can remember, nobody has ever volunteered to do the same
>>> for Windows.
>> I'd like to see something like this happen, too, and if a group of
>> volunteers emerges I'll do what I can through the PSF to provide
>> resources. Activities that benefit the whole community (or a large part
>> of it) are, IMHO, well worth supporting.
> 
> What would it entail to do this? Using py2exe + some installer (like
> Inno Setup) to create an installer that basically copies/installs the
> files into the site-packages folder or wherever the user chooses? If
> that's all it is, I would think it would be fairly easy to create
> these. Maybe I'm over-simplifying it though.
> 
> What are a some examples of packages that need this?
> 
MySQLdb and psycopg are two obvious examples I have had to grub around 
or produce my own installers for. There's generally some configuration 
work to do for packages that have been produced without considering 
Windows requirements, and ideally this will be fed back to the developers.

I think you may be oversimplifying a little. Pure Python packages aren't 
too problematic, it's mostly the extension modules. Unless a copy of 
Visual Studio is available (and we *might* get some cooperation from 
Microsoft there) that means resorting to MingW, which isn't an easy 
environment to play with (in my occasional experience, anyway).

There's going to be increasing demand for 64-bit implementations too.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From paddy3118 at googlemail.com  Tue Sep 18 03:12:51 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Tue, 18 Sep 2007 07:12:51 -0000
Subject: Getting indented code snippets into blogger
Message-ID: <1190099571.872701.136360@57g2000hsv.googlegroups.com>

I got tired of Bloggers inadequate comment editor so wrote this for
transforming code snippets:

=========================
'''
blogspace.py
Turns leading spaces into HTML &nbsp tokens which shows
as correct indentation on Blogger comment fields
(and maybe other blogs).

Donald. 'Paddy' McCarthy Sept 2011
'''
import fileinput, re


for l in fileinput.input():
  print re.sub(r'^(\s*)\s',
               lambda m: '&nbsp;'*m.end(),
               l.rstrip())
=========================

If you find it works on other blogs then please reply.to this thread.

- Paddy.



From rjagodic at gmail.com  Mon Sep 24 15:13:05 2007
From: rjagodic at gmail.com (Ratko)
Date: Mon, 24 Sep 2007 19:13:05 -0000
Subject: Can a base class know if a method has been overridden?
In-Reply-To: <46f7e8df$0$21052$426a74cc@news.free.fr>
References: <1190647436.423328.217670@w3g2000hsg.googlegroups.com>
	<46f7d897$0$25150$426a74cc@news.free.fr>
	<1190648887.051630.168520@r29g2000hsg.googlegroups.com>
	<46f7e8df$0$21052$426a74cc@news.free.fr>
Message-ID: <1190661185.359967.78610@w3g2000hsg.googlegroups.com>

> Ok. The simplest solution, then, is simply to not implement the method
> in the base class, ie:
>
> class EvtHandler:
>      def __init__(self):
>          if hasattr(self, 'onKey'):
>               register_for_key_events()
>
>       #def onKey(self):
>       #    pass
>
> class MyHandler(EvtHandler):
>      def onKey(self):
>          # do something here....
>
> Another solution is to compare the functions wrapped by the methods:
>
> class EvtHandler:
>      def __init__(self):
>          onKey = getattr(self, 'onKey')
>          if onKey.im_func is EvtHandler.onKey.im_func:
>               register_for_key_events()
>
>       def onKey(self):
>          pass
>
> class MyHandler(EvtHandler):
>      def onKey(self):
>          # do something here....
>
> HTH

The second solution works beautifully! Thank you very much.
I was aware that not implementing the onKey method in the first place
is the simplest solution but it's much cleaner to offer the methods in
advance so that the user can see what is possible.

Ratko



From adonisv at REMOVETHISearthlink.net  Wed Sep  5 21:21:57 2007
From: adonisv at REMOVETHISearthlink.net (Adonis Vargas)
Date: Wed, 05 Sep 2007 21:21:57 -0400
Subject: How to do python and RESTful
In-Reply-To: <1189022079.403495.175800@g4g2000hsf.googlegroups.com>
References: <1189022079.403495.175800@g4g2000hsf.googlegroups.com>
Message-ID: <13dulhpfo4gb236@corp.supernews.com>

MarkyMarc wrote:
> Hi all,
> 
> I want to make a web service application in python and keywords are
> RESTful, python and nice urls(urls mapped to python objects).
> 
> I don't want a big framework but a nice small one, that can just do
> the things I want.
> 
> I have be looking at quixote, but is this uptodate? "plain"
> mod_python, can this make url to http put,get,delete and post?
> 
> Can some one here point me some where I can read about python and
> RESTful or have some experiences with other?
> 
> Any help is apricieted.
> 
> Regards Marc
> 

Here is a crude version, if you check out CherryPy there exists a 
RESTful module for it floating around. Plus you will get the power or 
CherryPy for your apps. I do not have the urls offhand but google should 
yeild exactly what you need.

import BaseHTTPServer

class REST(BaseHTTPServer.BaseHTTPRequestHandler):

     """
     You can implement and do_* method you want
     """

     def do_GET(self):
         self.wfile.write("get")

     def do_POST(self):
         self.wfile.write("post")

     def do_PUT(self):
         self.wfile.write("put")

     def do_DELETE(self):
         self.wfile.write("delete")

def main(server_class=BaseHTTPServer.HTTPServer, handler_class=REST):
     server_address = ('', 8000)
     httpd = server_class(server_address, handler_class)
     httpd.serve_forever()

if __name__ == '__main__':
     main()

Not fully tested but should get on your feet.

Hope this helps.

Adonis Vargas


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Sep  5 13:15:37 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 05 Sep 2007 19:15:37 +0200
Subject: So what exactly is a complex number?
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>	<mailman.212.1188576194.28954.python-list@python.org>	<451mq4-les.ln1@ozzie.tundraware.com>	<mailman.266.1188644067.28954.python-list@python.org>
	<lbjpq4-eo22.ln1@ozzie.tundraware.com>
	<mailman.310.1188805355.28954.python-list@python.org>
Message-ID: <5k86hqF2if1hU1@mid.individual.net>

Grzegorz S?odkowicz wrote:

> In fact, a proper vector in physics has 4 features: point of
> application, magnitude, direction and sense.

No -- a vector has the properties "magnitude" and direction.
Although not everything that has magnitude and direction is a
vector.

It's very unusual to have a fixed point of application as a vector's
property (at least I haven't seen it so far). That would complicate
equality tests.

> In case of a vector in two dimensions (a special case, which you
> also fail to stress not to mention that you were talking about
> space) the magnitude and sense can be described by one number 

Actually, the "magnitude" and "sense" you use here are redundant.
What's the difference between a vector with magnitude "1" and
sense "-", and magnitude "-1" and sense "+"?

> and the direction as another.

Represent the direction as one number? Only in a one-dimensional
space.

Regards,


Bj?rn

-- 
BOFH excuse #441:

Hash table has woodworm



From steve at REMOVE-THIS-cybersource.com.au  Sun Sep 30 06:36:00 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sun, 30 Sep 2007 10:36:00 -0000
Subject: Can you please give me some advice?
References: <mailman.1300.1191147737.2658.python-list@python.org>
Message-ID: <13fuv0gh7342r27@corp.supernews.com>

On Sun, 30 Sep 2007 19:22:07 +0900, Byung-Hee HWANG wrote:

> Hi there,
> 
> What is different between Ruby and Python? I am wondering what language
> is really mine for work. Somebody tell me Ruby is clean or Python is
> really easy! Anyway I will really make decision today what I have to
> study from now on. What I make the decision is more difficult than to
> know why I have to learn English. Yeah I do not like to learn English
> because it is just very painful..
> 
> Can you please give me some advice?


Hello World in Ruby (and a few other languages):
http://www.oreillynet.com/ruby/blog/2005/12/hello_world.html

More here:
http://en.wikibooks.org/wiki/Programming:Ruby_Creating_Ruby_programs

Hello World in Python:
http://python.about.com/od/gettingstarted/ss/helloworld.htm

A Python tutorial:
http://docs.python.org/tut/


Sorry about the English.





-- 
Steven


From eric at abrahamsen.com  Wed Sep  5 23:18:29 2007
From: eric at abrahamsen.com (Eric Abrahamsen)
Date: Thu, 6 Sep 2007 11:18:29 +0800
Subject: ??????urllib post????????????
In-Reply-To: <20070906024041.GA6599@gmail.com>
References: <1188993813.330662.174660@w3g2000hsg.googlegroups.com>
	<20070906024041.GA6599@gmail.com>
Message-ID: <0665EB55-E95B-4DEA-876B-E6DD95228137@abrahamsen.com>

It's in Chinese, so ASCII is no go. If anyone's interested in  
answering his question (he's trying to download a linked file using  
the post method from urllib tools, not something I know about) I can  
translate it, and pass the answer back to him once there's some kind  
of consensus.

E


On Sep 6, 2007, at 10:40 AM, O.R.Senthil Kumaran wrote:

> If possible, please post your query in ASCII.
>
> -- 
> Senthil
>
>
> * liangxuliang79 at gmail.com <liangxuliang79 at gmail.com> [2007-09-05  
> 05:03:33]:
>
>> ????www.mmmppp333.com??????????http://ishare.iask.sina.com.cn/cgi- 
>> bin/
>> fileid.cgi?fileid=844050
>> ??????post fileid=844050????????
>>
>> ????post????????????fileid=844050??????server??????????header?? 
>> header????local????location????
>> ?????????????????????????????????????????????? 
>> mp3????????????????????????????local???????????? 
>> mp3??????????????????????????????????
>> ??????????????????????????????
>>
>> ??????????????python??urllib????????urllib??????????????????????? 
>> local????????????????local????????mp3????????
>> ????????????????mp3.??
>>
>> ??post????????/download.php?? post???????? 
>> fileid=844050????????????????????????????????????????????????????
>> ????????????????????web??????????????????????
>> -- 
>> http://mail.python.org/mailman/listinfo/python-list
> -- 
> O.R.Senthil Kumaran
> http://uthcode.sarovar.org
> -- 
> http://mail.python.org/mailman/listinfo/python-list



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Sep 18 08:28:30 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 18 Sep 2007 14:28:30 +0200
Subject: can Python be useful as functional?
In-Reply-To: <1190106829.680544.159250@g4g2000hsf.googlegroups.com>
References: <1190073045.618869.261290@k79g2000hse.googlegroups.com>
	<46ef8895$0$21882$426a34cc@news.free.fr>
	<1190106829.680544.159250@g4g2000hsf.googlegroups.com>
Message-ID: <46efc468$0$21740$426a34cc@news.free.fr>

Kay Schluehr a ?crit :
> On 18 Sep., 10:13, Bruno Desthuilliers <bruno.
> 42.desthuilli... at wtf.websiteburo.oops.com> wrote:
>> Lorenzo Stella a ?crit :
>>
>>> Hi all,
>>> I haven't experienced functional programming very much, but now I'm
>>> trying to learn Haskell and I've learned that: 1) in functional
>>> programming LISTS are fundmental;
>> Not exactly. They are used quite a lot, yes, but that's also the case in
>> other paradigms. What's important in functional programming is *functions*.
> 
> Functional lists are not quite the same. They are actually recursive
> datastructes. 

Linked lists, most of the time, yes.

(snip)
> In order to access an element you already need a recursive function
> defintion ( unless you just want to examine the head or the tail
> only ) and this makes functional programming and "consed" lists a
> perfect match.

Indeed. And that's also why some FP idioms don't translate directly in 
Python.

> [...]
> 
>> Strictly speaking, a language is functional if it has functions as first
>> class objects. Period.
> 
> No, not period and not strictly speaking.

Ok, even on c.l.functional - where the above definition comes from BTW 
-, nobody really agree on the "correct" definition of functional !-)



From alex at spam.me.not  Mon Sep 24 15:30:54 2007
From: alex at spam.me.not (alex)
Date: Mon, 24 Sep 2007 15:30:54 -0400
Subject: An Editor that Skips to the End of a Def
In-Reply-To: <D2WIi.28146$eY.22404@newssvr13.news.prodigy.net>
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk>
	<tfAIi.51111$Um6.44314@newssvr12.news.prodigy.net>
	<YPGIi.54591$YL5.26012@newssvr29.news.prodigy.net>
	<874phou1pa.fsf@benfinney.id.au>
	<e8HIi.3303$4J3.1378@newssvr22.news.prodigy.net>
	<46f3708c$0$32593$426a74cc@news.free.fr>
	<D2WIi.28146$eY.22404@newssvr13.news.prodigy.net>
Message-ID: <xaUJi.1506$uf2.631@llnews>

W. Watson wrote:
> Well, you may. Unfortunately, there are many NGs that do the opposite.
> 
> Bruno Desthuilliers wrote:
>> W. Watson a ?crit :
>>> How about in the case of MS Win?
>>>
>>> Ben Finney wrote:
>>>>
>>>> (Please don't top-post. Instead, reply below each point to which
>>>> you're responding, removing quoted text irrelevant to your response.)
>>>>
>>
>> Wayne, may I second Ben on his suggestion to stop top-posting ?
> 

*plonk*


From steve at holdenweb.com  Wed Sep 26 09:36:31 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 26 Sep 2007 09:36:31 -0400
Subject: Packaging and dependencies
In-Reply-To: <87zlz9kfw3.fsf_-_@benfinney.id.au>
References: <87ejgmklep.fsf@benfinney.id.au>
	<878x6ukkvq.fsf@benfinney.id.au>	<5luhb0Faal8aU1@mid.uni-berlin.de>
	<87zlz9kfw3.fsf_-_@benfinney.id.au>
Message-ID: <fddn8t$uib$1@sea.gmane.org>

Ben Finney wrote:
> "Diez B. Roggisch" <deets at nospam.web.de> writes:
> 
>> In my opinion, python is steering here to a direction like Java with
>> it's classpath: scripts like workingenv and it's successor (forgot
>> the name) provide hand-tailored environments for a specific
>> application.
> 
> What a silly waste of resources. So, if fifteen different programs
> depend on library X, we'd have fifteen *separate* installations of
> library X on the same machine?
> 
You need to get your opinions up to date. Fifteen copies of a single 
library is nothing in terms of the code bloat that has happened over the 
last forty years, and most of that bloat is for programmer convenience, 
either in package development or distribution.

While it's all very well to say that there should only ever be one true 
version of a library this requires that developers constrain themselves 
(sometimes in ways they consider unreasonable) to backwards 
compatibility for the entire lifetime of their code.

> And when it comes time to upgrade library X because a security flaw is
> discovered, each of the fifteen instances must be upgraded separately?
> 
Yes. Better than upgrading a single library shared between fifteen 
applications and having two of them break.

>> So maybe you should rather try and bundle your app in a way that it
>> is self-contained.
> 
> That entirely defeats the purpose of having packages declare
> dependencies on each other. The whole point of re-usable library code
> is to *avoid* having to re-bundle every dependency with every separate
> application.
> 
Agreed, but until we reach the ideal situation where everybody is using 
the same package dependency system what's your practical solution? 
"Self-contained" has the merit that nobody else's changes are going to 
bugger about with my application on a customer's system. The extra disk 
space is a small price to pay for that guarantee.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From musiccomposition at gmail.com  Tue Sep 25 22:48:18 2007
From: musiccomposition at gmail.com (Benjamin)
Date: Wed, 26 Sep 2007 02:48:18 -0000
Subject: stopping a while True: with the keyboard
In-Reply-To: <mailman.1071.1190769576.2658.python-list@python.org>
References: <mailman.1071.1190769576.2658.python-list@python.org>
Message-ID: <1190774898.348656.190760@y42g2000hsy.googlegroups.com>

On Sep 25, 8:19 pm, patrick <pured... at 11h11.com> wrote:
> hi all,
>
> i am looking for a way to break a while True: when pressing "s" on my
> keyboard. how can i do this?
>
> pat

Ctrl-C



From ironfroggy at gmail.com  Sat Sep 15 18:25:44 2007
From: ironfroggy at gmail.com (Calvin Spealman)
Date: Sat, 15 Sep 2007 18:25:44 -0400
Subject: Needless copying in iterations?
In-Reply-To: <fchk59$mm3$1@daisy.noc.ucla.edu>
References: <fchk59$mm3$1@daisy.noc.ucla.edu>
Message-ID: <76fd5acf0709151525j1eeea975p41d7cbdcc10ecb61@mail.gmail.com>

This is a case where its up to the type involved. For example,
xrange() slices the way you want but range() does not. Maybe a type
would return for slices a proxy object that got the value by index or
maybe it knows that it makes more sense to give you a copy because
changes during the iteration should not be reflected in the iteration.
It would be really easy to make a generic slicer.

On 9/15/07, James Stroud <jstroud at mbi.ucla.edu> wrote:
> Hello all,
>
> I was staring at a segment of code that looked like this today:
>
>     for something in stuff[x:y]:
>       whatever(something)
>
> and was wondering if the compiler really made a copy of the slice from
> stuff as the code seems to suggest, or does it find some way to produce
> an iterator without the need to make a copy (if stuff is a built-in
> sequence type)? Or would it be more efficient to do the more clumsy (in
> my opinion):
>
>     for i in xrange(x, y):
>       whatever(stuff[i])
>
> James
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
Read my blog! I depend on your acceptance of my opinion! I am interesting!
http://ironfroggy-code.blogspot.com/


From mridula.ccpl at gmail.com  Fri Sep 21 03:03:30 2007
From: mridula.ccpl at gmail.com (Mridula Ramesh)
Date: Fri, 21 Sep 2007 12:33:30 +0530
Subject: global name is not defined - but this is actually a function's name
Message-ID: <33dffc910709210003h587be4c7tab0201a536cfdff@mail.gmail.com>

thanks! that fixed it :)
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From e.expelliarmus at yahoo.com  Tue Sep 25 05:23:47 2007
From: e.expelliarmus at yahoo.com (e.expelliarmus)
Date: Tue, 25 Sep 2007 02:23:47 -0700
Subject: hacking,anti-hacking,registry tweaks,compter tricks
Message-ID: <1190712227.677288.177740@g4g2000hsf.googlegroups.com>


check this out buddies. kool website for:
* hacking and anti hacking tricks
* anti hackng tricks.
* registry tweaks
* orkut tricks
* small virus
* computer tricks
and loads of different tricks...
www.realm-of-tricks.blogspot.com
www.registrydecoded.blogspot.com



From jorgen.maillist at gmail.com  Fri Sep  7 11:40:44 2007
From: jorgen.maillist at gmail.com (Jorgen Bodde)
Date: Fri, 7 Sep 2007 17:40:44 +0200
Subject: How to determine the bool between the strings and ints?
Message-ID: <11e49df10709070840ifb89ec1x852063669689fc05@mail.gmail.com>

Hi All,

I have a dictionary with settings. The settinfgs can be strings, ints
or bools. I would like to write this list dynamically to disk in a big
for loop, unfortunately the bools need to be written as 0 or 1 to the
config with WriteInt, the integers also with WriteInt and the strings
with a simple Write.

The list is something like;

options[A] = True
options[B] = 1
options[C] = "Hello"

I wanted to use isinstance to determine if it is a bool or an int or a
string. However I am confused trying it out in the interactive editor;

>>> a = False
>>> if isinstance(a, bool):
... 	print "OK"
... 	
OK
>>> if isinstance(a, int):
... 	print "OK"
... 	
OK
>>>

I don't get it. is the bool derived from 'int' in some way? What is
the best way to check if the config I want to write is an int or a
bool ?

Regards,
- Jorgen


From hniksic at xemacs.org  Sat Sep  8 05:38:35 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Sat, 08 Sep 2007 11:38:35 +0200
Subject: Generating a unique identifier
References: <13e2fgbbpsatm39@corp.supernews.com>
	<7x3axq7a8a.fsf@ruckus.brouhaha.com>
	<7xodgejx3l.fsf@ruckus.brouhaha.com>
	<13e43ups034ld13@corp.supernews.com>
Message-ID: <873axpxzs4.fsf@mulj.homelinux.net>

Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> writes:

> Should garbage-collecting 16 million strings really take 20+
> minutes?

It shouldn't.  For testing purposes I've created a set of 16 milion
strings like this:

s = set()
for n in xrange(16000000):
  s.add('somerandomprefix' + str(n))  # prefix makes the strings a bit larger

It takes maybe about 20 seconds to create the set.  Quitting Python
takes 4-5 seconds.  This is stock Python 2.5.1.


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Sep 18 04:22:12 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 18 Sep 2007 10:22:12 +0200
Subject: adding a static class to another class
In-Reply-To: <mailman.680.1190071362.2658.python-list@python.org>
References: <mailman.629.1189984482.2658.python-list@python.org>	<46eef7d2$0$13879$426a74cc@news.free.fr>
	<mailman.680.1190071362.2658.python-list@python.org>
Message-ID: <46ef8aae$0$12885$426a74cc@news.free.fr>

Nathan Harmston a ?crit :
> Hi,
> 
> I guess my description was a bit rubbish in retrospec, I dont even
> think the title of my email made sense....it doesnt to me now:
> 
> class Manager(object):
>   def __init__(self):
>     pass
>   def dosomething(self):
>     return "RESULTS"
> 
> class Foo(object):
>   def __init__(self):
>     self.a = "NEE"
> 
> What I m trying to do is end up with the following syntax:
> 
> f = Foo() # instantiates a Foo object
> g= Foo.objects.dosomething() # returns "RESULTS"
> 
> The best way I ve found of doing this is overriding new
> 
> class Foo(object):
>     def __new__(cls, *args, **kw):
>       cls.objects = Manager()
> 

You're obviously overcomplexifying things here...

# the canonical pythonic way
class Foo(object):
   objects = Manager()

   def __init__(self):
     self.a = "NEE"


# the monkeypatch way
class Foo(object):
   def __init__(self):
     self.a = "NEE"

Foo.objects = Manager()



HTH


From JeffHua at aol.com  Fri Sep  7 11:57:25 2007
From: JeffHua at aol.com (JeffHua at aol.com)
Date: Fri, 7 Sep 2007 11:57:25 EDT
Subject: why should I learn python
Message-ID: <bf9.20643c03.3412cee5@aol.com>

 
In a message dated 2007-9-7 7:50:32, bgates at microsoft.com writes:

Tom  Brown wrote:

> On Thursday 06 September 2007 15:44, Torsten Bronger  wrote:
>> Hall?chen!
>>
>> Tom Brown  writes:
>> > [...] Python has been by far the easiest to develop  in.  Some
>> > people might say it is not "real programming"  because it is so
>> > easy.
>>
>> I can't  believe this.  Have you really heard such a statement?
> 
>  Yes. I was told this by a C programmer. Something about doing it all
>  yourself and not using provided packages. I countered with something  about
> reinventing the wheel. :)

Point this so-called "C  Programmer" toward Henry Spencer's "Ten Commandments
of C  Programming".  Note in particular rule 7:

7. Thou shalt study thy libraries and strive not to reinvent  them
without cause, that thy code  may be short and readable and thy
days pleasant and productive.

You can find the whole list  here:

http://www.everything2.com/index.pl?node_id=783755

-- 
_http://mail.python.org/mailman/listinfo/python-list_ 
(http://mail.python.org/mailman/listinfo/python-list) 


 
 
 
_bgates at microsoft.com_ (mailto:bgates at microsoft.com) ? This seems  like Bill 
Gates' email,does he also like Python? :-)



************************************** Get a sneak peek of the all-new AOL at 
http://discover.aol.com/memed/aolcom30tour
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From gtcopeland at gmail.com  Sat Sep  1 09:23:37 2007
From: gtcopeland at gmail.com (Greg Copeland)
Date: Sat, 01 Sep 2007 06:23:37 -0700
Subject: Fast socket write
In-Reply-To: <mailman.113.1187789425.32294.python-list@python.org>
References: <1187744469.240933.149610@r23g2000prd.googlegroups.com>
	<46cba22b$1_1@news.chariot.net.au>
	<1187787707.377952.322280@57g2000hsv.googlegroups.com>
	<mailman.113.1187789425.32294.python-list@python.org>
Message-ID: <1188653017.937988.189010@o80g2000hse.googlegroups.com>

On Aug 22, 8:30 am, paul <p... at subsignal.org> wrote:
> Greg Copeland schrieb:> On Aug 21, 9:40 pm, Bikal KC <nepbabucxspamf... at yahoo.ca> wrote:
> >> Greg Copeland wrote:
> >>> I'm having a brain cramp right now.  I can't see to recall the name of
> >> Is your cramp gone now ? :P
>
> > I wish.  If anyone can remember the name of this module I'd realy
> > appreciate it.
>
> http://tautology.org/software/python-modules/sendfileprobably...



That's it.  Thanks guys!

Greg



From deets at nospam.web.de  Sat Sep 22 13:56:54 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 22 Sep 2007 19:56:54 +0200
Subject: Who can develop the following Python script into working
	application ?
In-Reply-To: <m37imig4kj.fsf@netmaster.kds.com.ua>
References: <1190334828.210230.293980@50g2000hsm.googlegroups.com>
	<1190372423.768184.60080@19g2000hsx.googlegroups.com>
	<5lho31F84jgjU1@mid.uni-berlin.de>
	<1190419744.390216.19040@w3g2000hsg.googlegroups.com>
	<5lk9e0F8leeeU1@mid.uni-berlin.de>
	<m37imig4kj.fsf@netmaster.kds.com.ua>
Message-ID: <5ll3c1F7k6d3U2@mid.uni-berlin.de>

Andrey Khavryuchenko schrieb:
>  DBR> And as you said yourself:
> 
>  DBR> """
>  DBR> Frankly speaking I would prefer to pay for your kind assistance
>  DBR> as it may take me to much time to learn some Python and understand the
>  DBR> following script.
>  DBR> """
> 
>  DBR> Now, again: http://www.guru.com/ There you can get devlopers for
>  DBR> money. So what again is your problem?
> 
> Actually, I am a python (and django) developer, looking for a contract,
> owning Nokia 770 and contacted original poster with no response.

Well, I presume the above quoted wasn't exactly true - in the end, the 
whole attitude of the OP smelled after "I want you to do work for me for 
free that I'm unwilling to bother myself with - as it would mean putting 
effort into it."

Diez


From gslindstrom at gmail.com  Tue Sep 18 15:09:56 2007
From: gslindstrom at gmail.com (Greg Lindstrom)
Date: Tue, 18 Sep 2007 14:09:56 -0500
Subject: Newbie question
Message-ID: <a9f39a410709181209r58b8000elf5d88434dd50f67f@mail.gmail.com>

>
> I see.  It's so hard to imagine the world of python than from VB.
> It's like looking at VB is in 2 dimensions, where with Python, it's
> more 3D.  The code is so simple, yet it's hard for me to envision how
> to do something so simple.  I guess it's because the rules or the way
> of looking at things in Python, things can be stripped down to the
> bare bones and in so many ways.  Thanks.
>
> Kou


Indeed. A common phrase you will here around here is "reset your mind".
Python, like most languages, has it's own way of looking at the world.  You
may want to look at the tutors list, too (tutor at python.org).  You'll like it
there (I do).

--greg
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From mridula.ccpl at gmail.com  Tue Sep 25 01:50:01 2007
From: mridula.ccpl at gmail.com (Mridula Ramesh)
Date: Tue, 25 Sep 2007 11:20:01 +0530
Subject: calling the function of one class from another class
In-Reply-To: <33dffc910709220024l74b14267v93564df10f5af9a6@mail.gmail.com>
References: <33dffc910709220024l74b14267v93564df10f5af9a6@mail.gmail.com>
Message-ID: <33dffc910709242250n6d39836fo7704f879980806e9@mail.gmail.com>

thanks! ... sorry, i lacked access to the internet for a bit there... um,
no, i'm not trying to write in java style in python, because i don't even
know java!! i tried the "self" thing but that wasnt enough. I had to (as
Furkan Kuru said) use a new instance of that class and only then call the
function - that worked fine.

so a big belated thanks, everyone!

On 22/09/2007, Mridula Ramesh <mridula.ccpl at gmail.com> wrote:
>
> hi.
>
> i currently have code structured like this:
>
> classA():
> >     def __init__():
> >      ..............
> >      ..............
> >
> >     def fnc1():
> >     ....................
> >     ....................
> >
> >
> > classB():
> >    def __init__():
> >     ........................
> >     ........................
> >     classA.fnc1()    #this is where i get an error
> >
>
> TypeError: unbound method fnc1() must be called with classA instance as
> first argument (got nothing instead)
>
> when i do  fnc1(classA) i get:
>
> NameError: global name 'fnc1' is not defined
>
> am i violating some programming rule by trying to call fnc1 in classB? i
> am only now learning OO alongside python, so i'm not sure! also, can someone
> please tell me where to go for more articles on the classes and functions
> and calling them from other places?
>
> thanks a lot!
>
> mridula.
>
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From jeff at jmcneil.net  Sat Sep  8 21:25:37 2007
From: jeff at jmcneil.net (Jeff McNeil)
Date: Sat, 8 Sep 2007 21:25:37 -0400
Subject: help - error when trying to call super class method
In-Reply-To: <584090.28836.qm@web51105.mail.re2.yahoo.com>
References: <584090.28836.qm@web51105.mail.re2.yahoo.com>
Message-ID: <82d28c40709081825l2da03767ie8e6c8d58b750b88@mail.gmail.com>

You shouldn't even need the call to super in that method, a simple
'len(self)' ought to be sufficient.  Note that using the list object's
append method is going to be much more efficient than handling it yourself
anyways.

There are a few problems in your call to super. First, it's a callable - it
doesn't work like the Java equivalent.  Next, as the superclass of Stackx is
list, and there is no 'len' attribute on list, you'll bomb with an
AttributeError.

Lastly, you'll also generate an AttributeError when you increment 'my_len.'

Here's a quick example using 'super.'

class X(object):
    def meth(self):
        print "Hello"

class Y(X):
    def meth(self):
        super(Y, self).meth()

Y().meth()

$ python test.py
Hello

For a bit more information on the use of super, check out
http://docs.python.org/lib/built-in-funcs.html. Lastly, super will only work
with new-style classes (which yours is, due to the subclass of list).

-Jeff


On 9/8/07, dontknowwhy88 <dontknowwhy88 at yahoo.com> wrote:
>
>
> I am trying to extend list class to build a stack class -- see code
> below---
> but I got an error when I try to call len method from list class here..
> why?
> Thanks in advance!
> ---------------------
>
> class Stackx(list):
>
>   def push(self,x):
>       indx= super.len(x)
>       self.insert(my_len+1,x)
>
>   def pop(self):
>       return self[-1]
>
> def test():
>
>     myStack = Stackx([1, 2 ,3 ,4])
>     print myStack
>     myStack.push(9)
>     print myStack
>     print myStack.pop()
>
>
> if __name__=='__main__':
>     test()
>
>
> '''
>
> Traceback (most recent call last):
>   File "C:\Python25\Stack2.py", line 20, in <module>
>     test()
>   File "C:\Python25\Stack2.py", line 14, in test
>     myStack.push(9)
>   File "C:\Python25\Stack2.py", line 4, in push
>     indx= super.len(x)
> AttributeError: type object 'super' has no attribute 'len'
> '''
>
> ------------------------------
> Be a better Heartthrob. Get better relationship answers
> <http://us.rd.yahoo.com/evt=48255/*http://answers.yahoo.com/dir/_ylc=X3oDMTI5MGx2aThyBF9TAzIxMTU1MDAzNTIEX3MDMzk2NTQ1MTAzBHNlYwNCQUJwaWxsYXJfTklfMzYwBHNsawNQcm9kdWN0X3F1ZXN0aW9uX3BhZ2U-?link=list&sid=396545433>from
> someone who knows.
> Yahoo! Answers - Check it out.
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From deets at nospam.web.de  Fri Sep 28 12:30:57 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 28 Sep 2007 18:30:57 +0200
Subject: Python 3.0 migration plans?
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>
	<87641v4j38.fsf@benfinney.id.au>
	<1190949502.875203.57690@w3g2000hsg.googlegroups.com>
	<5m3p1dFbl98pU1@mid.uni-berlin.de>
	<1190968707.799398.232550@19g2000hsx.googlegroups.com>
	<5m4126FbgjabU1@mid.uni-berlin.de>
	<1190993122.979034.305060@50g2000hsm.googlegroups.com>
Message-ID: <5m4oi1Fbic8sU1@mid.uni-berlin.de>

> You said it was a most basic language feature. I still haven't heard
> anything that leads me to believe that statement is correct. What
> languages implemented decorators as a most basic language feature?

I was talking about Python, the programming language that is discussed in
this NG. 

> Python didn't have them for over a decade so it doesn't qualify.

Says who? For further comments, see below.
 
>>
>> >> Maybe you should start using python more and _then_ start discussions
>> >> about it's features, when you have good grounds and can provide viable
>> >> alternatives? But I guess that's a wish that won't be granted....
>>
>> > static and abstract keywords would seem to be very viable
>> > alternatives. Viable enough that several language designers used them.
>>
>> As I said - you don't get it. The decorators (in conjunction with the
>> descriptor protocol - ever heard of that?) are very powerful yet lead as
>> an artifact to simple, declarative implementations of features you like,
>> namely static and abstract methods.
> 
> You said I had to provide a viable alternative. I did that. I haven't
> heard of the descriptor protocol.

Where did you do provide that alternative?

> One of the problems with "getting" decorators is that they are not in
> older books at all and newer books like Beginning Python from Novice
> to Professional (c) 2005 Magnus Lie Hetland, that I own, devote almost
> nothing to them. Out of 640 pages they are only mentioned
> in one paragraph that is in a section titled "Static Methods and Class
> Methods",(and followed by a class example with @staticmethod and
> @classmethod).
> 
> So it seems like Magnus Lie Hetland didn't think they were very
> important and he had Professional in his book title.


I consider "core features of a language" the features that are part of the
specification and implementation. Neither do I care if there is anecdotal
evidence of prior usage in other languages, nor who or who not thinks they
are important enough to be dealt with in a book. 

And above all, I don't consider the time things have been around _without_
any feature as proof of their irrelevance - or do you consider cars being
not core to western culture because they only have been around about 100
years, whereas horses have been there for thousands of years? Happy riding,
cowboy!

Python 2.4 has been released in 2003, btw - so decorators are around for 4
years now.

So unless you come up with a definition of "core feature of a language" that
someone respectable in the CS-community wrote that features "time being
around" or "random book authors consider worthy" or "persons lacking the
motivation to really dig into do finally get it", I consider your
definition worthless. Agreed?


>>
>> And as you seem being so reluctant to let new features creep into the
>> language, the introduction of new keywords you like?
> 
> I'm not against additions on principle.
> 
>>
>> Besides, those 'several language designers' seem to think that the
>> introduction of keywords isn't enough, but a general purpose annotation
>> scheme seems to be viable - or how do you explain e.g. JDK 1.5
>> Annotations?
> 
> I certainly wouldn't call them a basic language feature. Java 1.0 came
> out in January 1996, Java 1.5 in September 2004. It doesn't appear
> that the language designer of Java, James Gosling, is still at the
> wheel or BDFL. But yes, Java is showing signs of "complexity creep".
> You'll be happy to know that I really dislike the C++ template syntax
> and Java has decided to add something similar.

Again, your anecdotal language feature definition is nonsense.

By the way, considering generics and C++-templates as "something similar"
shows the inclined beholder that there are other languages out there you
don't really understand.

Diez


From aleax at mac.com  Wed Sep 12 11:29:55 2007
From: aleax at mac.com (Alex Martelli)
Date: Wed, 12 Sep 2007 08:29:55 -0700
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr>
	<Xns99A98AE12D514duncanbooth@127.0.0.1>
Message-ID: <1i4bjb8.63ihk49vs6c8N%aleax@mac.com>

Duncan Booth <duncan.booth at invalid.invalid> wrote:
   ...
> As for omitting 'self' from method definitions, at first site you might
> think the compiler could just decide that any 'def' directly inside a
> class could silently insert 'self' as an additional argument. This 
> doesn't work though because not everything defined in a class has to be
> an instance method: static methods don't have a self parameter at all,
> class methods traditionally use 'cls' instead of 'self' as the name of
> the first parameter and it is also possible to define a function inside
> a class block and use it as a function. e.g.

Actually you could do the "magic first-parameter insertion" just when
returning a bound or unbound method object in the function's __get__
special method, and that would cover all of the technical issues you
raise.  E.g.:

> class Weird:
>    def factory(arg):
>        """Returns a function based on its argument"""
> 
>    foo = factory("foo")
>    bar = factory("bar")
>    del factory
> 
> When factory is called, it is a simple function not a method. If it had

Sure, that's because the function object itself is called, not a bound
or unbound method object -- indeed. factory.__get__ never gets called
here.

> class C:
>    def method(self): pass
> 
> and
> 
> def foo(self): pass
> class C: pass
> C.method = foo
> 
> both of these result in effectively the same class (although the second
> one has a different name for the method in tracebacks).

And exactly the same would occur if the self argument was omitted from
the signature and magically inserted when __get__ does its job.

> That consistency really is important. Whenever I see a 'def' I know 
> exactly what parameters the resulting function will take regardless of
> the context.

And this non-strictly-technical issue is the only "true" one.

> Another area to consider is what happens when I do:
> 
>     foo = FooClass()
> 
>     foo.bar(x)
> # versus
>     f = foo.bar
>     f(x)
> 
> Both of these work in exactly the same way in Python: the self parameter

And so they would with the "__get__ does magic" rule, NP.

> My point here is that in Python the magic is clearly defined and 
> overridable (so we can have static or class methods that act 
> differently).

And so it would be with that rule, since staticmethod &c create
different descriptor objects.

Really, the one and only true issue is that the Python community doesn't
like "magic".  It would be perfectly feasible, we just don't wanna:-).


Alex


From cai.haibin at gmail.com  Wed Sep 12 05:07:39 2007
From: cai.haibin at gmail.com (james_027)
Date: Wed, 12 Sep 2007 09:07:39 -0000
Subject: setattr vs readonly property
Message-ID: <1189588059.059818.301090@y42g2000hsy.googlegroups.com>

hi,

My main purpose for using setattr(object, attr, value) for assign
values from a dict that has some keys that may not be present on some
object's attibute, which makes it work for me. My problem is dealing
with read only attribute like sample_attribute =
property(f_get=_get_sample_attribute). what approach should I use? Or
is my first approach In the first place right?

Thanks
james



From steve at holdenweb.com  Thu Sep  6 06:57:20 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 06 Sep 2007 03:57:20 -0700
Subject: SQLite and coercing to Unicode - please help.
In-Reply-To: <46dfcbea$0$89178$7b0f0fd3@mistral.news.newnet.co.uk>
References: <46dfcbea$0$89178$7b0f0fd3@mistral.news.newnet.co.uk>
Message-ID: <fbomei$mot$1@sea.gmane.org>

special_dragonfly wrote:
> Hello!
> First, the problem: the program below falls over with the following error:
> TypeError: coercing to Unicode: need string or buffer, NoneType found.
> and gives the following line:
> "' WHERE secBoardId='"+Values[0]+"'"
> My first thought was that Values[0] was containing nothing at all, that 
> would allow a NoneType to be found, but it has data in that position of the 
> list - you'll see below.
> So I thought that Values[0] was 'losing' its type somewhere, so I checked it 
> just by having the program print out type(Values[0]), it says it's a 
> string - also seen below.
> So given it's not a NoneType and it's a string, I don't understand why I'm 
> getting the error. I tried forcing it to a particular type (I think that's 
> the right word), so I put lines like:
> Values[0]=unicode(Values[0]) or
> WHERE ... ='"str(Values[0]+"'"
> but neither worked.
> I've put my code below, I'm sorry it's so long, I've commented the line 
> where it's falling over.
> If it's useful, I am using Python 2.5.1, ElementTree 1.2.6 and pySQLite 
> 2.3.5
> If this is a silly mistake ( one where RTFM is a valid response, can you 
> point me at the place where I can get the answer please?), otherwise any 
> help is greatly appreciated as I'm out of ideas. :(
> Dominic
> 
OK, the first problem is that you appear to be obsessing about Values[0] 
when there doesn't appear to be any evidence that value in particular is 
causing the problem. The line number being reported is simply that of 
the last line in a single long statement, and the issue could be 
anywhere in that statement. Sorry, you just have to know (or guess) 
that, it's not a particularly admirable feature of Python.

In point of fact it is the None values that are causing the problem:

$ /usr/bin/python
Python 2.5.1 (r251:54863, May 18 2007, 16:56:43)
[GCC 3.4.4 (cygming special, gdc 0.12, using dmd 0.125)] on cygwin
Type "help", "copyright", "credits" or "license" for more information.
 >>> "a string"+None
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
TypeError: cannot concatenate 'str' and 'NoneType' objects
 >>> u"a string"+None
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
TypeError: coercing to Unicode: need string or buffer, NoneType found
 >>>

The XML values you are retrieving will be Unicode strings, but you are 
mixing them with plain string values, hence the (somewhat unhelpful) 
error message..

Secondly, you are trying to construct a SQL UPDATE statement yourself, 
instead of parameterising it like you did your INSERT statement. This is 
also usually asking for trouble, and is vulnerable to SQL injection 
errors (use Google if you don't know what they are).

Thirdly, I'm not quite sure why you are using a list for the values, and 
another one for the Elements, when it would seems to make more sense to 
use a named variable for the former and just use the necessary string 
literals for the latter. What's the advantage of using

         try:
             branch=dom.getiterator(Elements[1])
             Values.append(branch[0].text) # currencyID
         except:
             Values.append(" "*3)

when you could just as easily say

         try:
             branch = dom.getiterator("currencyID")
             currencyID = branch[0].text
         except (..., ..., ...): # see below
             currencyID = "   "

The usual shorthand for

 
(Values[0],Values[1],Values[2],Values[3],Values[4],Values[5],\
Values[6],Values[7],Values[8],Values[9],Values[10],Values[11],\
                         Values[12],Values[13],Values[14])

would, by the way, be

         tuple(Values)

Note also that your INSERT statement assumes a specific ordering to the 
columns, which is asking for trouble when the database goes into 
production, as a DBA might re-order the fields during a reorganization 
or restructuring of the data, and then your code will break.

Finally, and almost completely irrelevant to the issue at hand, all 
those "except" clauses will catch *absolutely any error* that may occur 
in your code, which is almost always a bad idea, since this behavior 
will mask certain errors that you really want to know about. The XML 
analysis code is frankly pretty horrible, but we can address that issue 
once you start to get some results.

Sorry to bash what could well be your first significant program in 
Python, but my main interest is in setting you off down the right path. 
It will save time and grief in the end. Hope this has helped.

regards
  Steve

> 
> The output:
> At top of function: GBP/PLUS-ofn-GB00B12T7004
> Values list contains: ['GBP/PLUS-ofn-GB00B12T7004', u'GBP', u'GB00B12T7004 
> ', u'All Star Minerals plc                   ', 'ASMO', 'DE', 'PLUS', 
> u'B12T700', u'        ', u'A', None, None, None, '000000000000000000', '0', 
> '0']
> 
> Type of Values[0] is: <type 'str'>
> 
> The code:
> def dealwithSecBRep(text_buffer):
>     # text_buffer contains a sequential string of xml
>     Elements=['secBoardId','currencyId','issuerId','secName','secShortName','secClassId',\
>               'sectorId','isin','issueDate','inheritedState','bidPrice','offerPrice','midPrice',\
>               'standardMarketSize','openPrice','closePrice']
>     Values=[]
>     dom=get_a_document(text_buffer) # this function returns an xml document.
>     branch=dom.getiterator(Elements[0])
>     Values.append(GetUniqueId(branch[0])) # Combo of secCode and secBoardId
>     print "At top of function:",Values[0]
>     sql=cursor.execute('SELECT*FROM SecB WHERE 
> secBoardId='+"'"+Values[0]+"'").fetchall()
>     SQL2=sql
>     flag=0
>     if len(sql)>0:
>         #Prior database exists
>         try:
>             branch=dom.getiterator(Elements[1])
>             Values.append(branch[0].text) # currencyID
>         except:
>             value=GetFromDB('currencyCode',text_buffer)
>             Values.append(value)
>         try:
>             branch=dom.getiterator(Elements[2])
>             Values.append(branch[0].text) # issuerName
>         except:
>             value=GetFromDB('issuerName',text_buffer)
>             Values.append(value)
[other horrible code elided ...]

>         try:
>             branch=dom.getiterator(Elements[15])
>             value=string.ljust(string.rjust(branch[0][0].text,10,"0"),18,"0")
>             Values.append(branch[0].text) # Stock Close
>         except:
>             Values.append("0") # Stock Open
>         flag=1
>     if flag==0:
>         print "Values list contains:",Values,"\n"
>         print "Type of Values[0] is:",type(Values[0]),"\n"
>         longstring="UPDATE SecB SET 
> currencyCode='"+Values[1]+"',issuerName='"+Values[2]+"',instrName='"+Values[3]+\
>                     "',instrShortName='"+Values[4]+"',instrType='"+Values[5]+"',secCode='"+Values[6]+\
>                     "',SEDOL='"+Values[7]+"',Date='"+Values[8]+"',SuspendedState='"+Values[9]+\
>                     "',bidPrice='"+Values[10]+"',offerPrice='"+Values[11]+"',midPrice='"+Values[12]+\
>                     "',standardMarketSize='"+Values[13]+"',openOrClosed='"+Values[14]+\
>                     "' WHERE secBoardId='"+Values[0]+"'" # This is the line 
> it falls over on.
>         cursor.execute(longstring)
>         connection.commit()
>         currentStatus=SQL2[0][13] #current Stock Status
>         if currentStatus==1: # Open
>             if Values[14]!='0': # xml says open
>                 oldStart("<secBoardRep>",text_buffer) #5SE
>             elif Values[15]!='0': # xml says closed
>                 oldStart("<ClosingRep>",text_buffer)
>             elif Values[14]==0 and Values[15]==0: # neither openPrice nor 
> closePrice exist in xml
>                 oldStart("<secBoardRep2>",text_buffer) # just 5ER and 5IS
>         else: # currently Closed
>             if Values[14]!='0': #xml says open
>                 oldStart("<OpeningRep>",text_buffer) # 5PR
>             else: #xml says closed
>                 oldStart("<secBoard2Rep>",text_buffer) # 5ER,5IS
>     else:
>         cursor.execute('INSERT INTO SecB VALUES 
> (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)',\
>                        (Values[0],Values[1],Values[2],Values[3],Values[4],Values[5],\
>                         Values[6],Values[7],Values[8],Values[9],Values[10],Values[11],\
>                         Values[12],Values[13],Values[14]))
>         connection.commit()
>         if Values[14]!='0': # xml says open
>             test=dom.getiterator('openPrice')
>             oldStart("<secBoard2Rep>",text_buffer) # 5ER, 5IS
>             oldStart("<OpeningRep>",text_buffer) # 5PR
>         else: # xml says closed, or neither options exist.
>             oldStart("<secBoard2Rep>",text_buffer) # 5ER, 5IS
> 
> 
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Sep 17 03:32:44 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 17 Sep 2007 09:32:44 +0200
Subject: Python 3K or Python 2.9?
In-Reply-To: <1190013177.473529.167770@o80g2000hse.googlegroups.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<87sl5j5r34.fsf@benfinney.id.au>
	<1189646281.569796.267940@d55g2000hsg.googlegroups.com>
	<87ir6f5mrq.fsf@benfinney.id.au>
	<1189651204.408268.57580@19g2000hsx.googlegroups.com>
	<1i4dddf.piaojwz9lz40N%aleax@mac.com>
	<1189700775.661780.292150@50g2000hsm.googlegroups.com>
	<46e97917$0$9014$426a74cc@news.free.fr>
	<mailman.563.1189823461.2658.python-list@python.org>
	<1190013177.473529.167770@o80g2000hse.googlegroups.com>
Message-ID: <46ee2d9d$0$26213$426a74cc@news.free.fr>

TheFlyingDutchman a ?crit :
>> <Ironic>
>>
>> Hi, I'm new to Python, I don't even fully know the language, never done
>> a full project in Python. What's more, probably I'll never will.
>> But that's not the point, the point is I want YOU people to modify the
>> language you know in and out, the program with which you've done many
>> systems, I want you to change it to suit my whims, so that I'll be
>> comfortable with the 3 ten liners I'll write.
>> TIA
>>
>> </Ironic>
> 
> <Zobionic>
> Hi, I've used Python and have fallen in love with it. I know exactly
> how Guido pronounces his name and since I saw him use the obtuse
> phrase syntactic sugar I try and work it into every discussion I have
> on Python syntax. I hate it when anyone offers criticism of Guido's
> language. I have a picture of Bruce Eckel with a red universal not
> sign over it on my wall and I throw my mechanical pencils at it every
> night. I am especially upset when someone talks bad about kluges like
> @staticmethod or FunctionName = staticmethod(FunctionName). Sure "def
> static" or "static def" would be so much cleaner, simpler and clearer
> but let's face it my fellow Pythonistas, this language may have
> started out based on what was easy for people to learn and use but
> we're in Nerdville now and clean and clear have become roadblocks! I
> have so much more respect for Perl and the way it developed now!
> </Zombionic>
> 

<AolStrikesBack>
Hi, I'm totally unable to understand the difference between higher order 
functions and language statements, nor why the first approach is way 
better than the second. I'm totally clueless about Python's object model 
despite many posts explaining it and pointing to relevant documentation. 
And, ho, yes, I don't even understand the expression "syntactic sugar", 
but I guess it must some dummy concept invented by the guy that wrote 
Python whatever his name might be.

So I insist on posting that all this is a kludge and that Python should 
be how I think it could be instead of trying to understand why it is the 
way it is and why people actually using it like the way it is.

But what, given that I'm an AOL user still thinking it's kewl to hide 
behind a pseudo, what else would you expect ?
</AolStrikesBack>


From paul at boddie.org.uk  Wed Sep 19 18:51:23 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Wed, 19 Sep 2007 15:51:23 -0700
Subject: compile for ARM
In-Reply-To: <1190226961.806875.205530@i13g2000prf.googlegroups.com>
References: <mailman.774.1190221806.2658.python-list@python.org>
	<5ld5avF7ne3mU1@mid.uni-berlin.de>
	<1190226961.806875.205530@i13g2000prf.googlegroups.com>
Message-ID: <1190242283.372338.253440@22g2000hsm.googlegroups.com>

On 19 Sep, 20:36, Paul McGuire <pt... at austin.rr.com> wrote:
>
> The gumstix buildroot requires a Linux platform - I was able to build
> Python for gumstix using a Debian environment.  The gumstix mailing
> list and wiki were very helpful.

The inquirer might also consider crosstool, which is good at building
cross-compilers for GNU/Linux targeting "Embedded Linux":

http://www.kegel.com/crosstool/

As for building Python itself, searching the Python bug tracker for
"cross-compile" might provide some patches and advice:

http://bugs.python.org/

Also try looking at the python.org Wiki for information, starting
here:

http://wiki.python.org/moin/EmbeddedPython

Paul



From jeff at jmcneil.net  Thu Sep 27 15:56:27 2007
From: jeff at jmcneil.net (Jeff McNeil)
Date: Thu, 27 Sep 2007 15:56:27 -0400
Subject: How to Catch Errors in SimpleXMLRPCServer
In-Reply-To: <82d28c40709271255s1039e861xf9abbc80e1b56b09@mail.gmail.com>
References: <1190921745.575519.53560@y42g2000hsy.googlegroups.com>
	<82d28c40709271255s1039e861xf9abbc80e1b56b09@mail.gmail.com>
Message-ID: <82d28c40709271256p21eaad7bk5458616bc09af8dc@mail.gmail.com>

getattr, not self.getattr.

On 9/27/07, Jeff McNeil <jeff at jmcneil.net> wrote:
> Instead of register_function, use register_instance and provide a
> _dispatch method in that instance that handles your exception logging.
>
> Pseudo:
>
> class MyCalls(object):
>     def _dispatch(self, method, args):
>         try:
>             self.getattr(self, method)(*args)
>         except:
>             handle_logging()
>
> server = SimpleXMLRPCServer(("localhost", 8000))
> server.register_instance(MyCalls())
> server.serve_forever()
>
> There might be an easier way... but this works for me.
>
> -Jeff
>
> On 9/27/07, gregpinero at gmail.com <gregpinero at gmail.com> wrote:
> > I have a pretty simple XMLRPCServer, something along the lines of the
> > example:
> >
> > server = SimpleXMLRPCServer(("localhost", 8000))
> > server.register_function(pow)
> > server.register_function(lambda x,y: x+y, 'add')
> > server.serve_forever()
> >
> > Now what I want to do is catch any errors that happen on requests, and
> > ideally have them emailed to me.  I have the email part all taken care
> > of, I just need to know how to get at the exceptions.
> >
> > Thanks in advance for any help,
> >
> > Greg
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>


From larry.bates at websafe.com  Thu Sep  6 19:15:50 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Thu, 06 Sep 2007 18:15:50 -0500
Subject: Subclassing zipfile (new style class)
Message-ID: <H8KdnVfPDO28F33bnZ2dnUVZ_i2dnZ2d@comcast.com>

I'm trying to learn about subclassing new style classes and the first project I 
went to do needs to subclass zipfile to add some methods.


Why does this:

import zipfile
class walkZip(zipfile):
     pass


if __name__ == "__main__":
     print "Hello World"

Traceback (most recent call last):
   File "<string>", line 192, in run_nodebug
   File "<module1>", line 2, in <module>
TypeError: Error when calling the metaclass bases
     module.__init__() takes at most 2 arguments (3 given)
 >>>

Thanks in advance.

-Larry


From fakeaddress at nowhere.org  Sun Sep 30 15:36:08 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Sun, 30 Sep 2007 19:36:08 GMT
Subject: which language allows you to change an argument's value?
In-Reply-To: <1191149233.346818.246170@22g2000hsm.googlegroups.com>
References: <1191149233.346818.246170@22g2000hsm.googlegroups.com>
Message-ID: <IUSLi.56235$YL5.741@newssvr29.news.prodigy.net>

Summercool wrote:
> I wonder which language allows you to change an argument's value?
> like:
> 
> foo(&a) {
>   a = 3
> }
> 
> n = 1
> print n
> 
> foo(n)     # passing in n, not &n
> print n
> 
> and now n will be 3.  I think C++ and PHP can let you do that, using
> their reference (alias) mechanism.  And C, Python, and Ruby probably
> won't let you do that.  What about Java and Perl?

I think you've missed how Python works, and probably others.
A Python function receives a reference to the argument, and
can modify the object if the object is mutable.

Nevertheless, assigning to the parameter's name will not
change the passed object. This function does nothing:

     def clear_list_wrong(lst):
         lst = []  # useless re-binding of local name

This version empties the passed list:

     def clear_list(lst):
         del lst[:]


> is there any way to prevent a function from changing the argument's
> value?

Sure. First choice: Don't change the value in the function.
Alternatives include making a copy to use as the argument.

> isn't "what i pass in, the function can modify it" not a desireable
> behavior if i am NOT passing in the address of my argument?  For one
> thing, if we use a module, and call some functions in that module, and
> the module's author made some changes to his code, then we have no way
> of knowing what we pass in could get changed.

Don't rely on undocumented behavior. Modules worth using are by
good programmers. Authors of library modules tend to be zealous
about not breaking client code.


-- 
--Bryan


From bj_666 at gmx.net  Sat Sep 22 07:15:53 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 22 Sep 2007 11:15:53 GMT
Subject: Would Anonymous Functions Help in Learning Programming/Python?
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<1190413322.962737.53900@r29g2000hsg.googlegroups.com>
	<1190414192.636397.146450@57g2000hsv.googlegroups.com>
	<1190443748.907702.154660@22g2000hsm.googlegroups.com>
	<7xlkazgpc5.fsf@ruckus.brouhaha.com>
	<1190447257.060479.141280@n39g2000hsh.googlegroups.com>
	<5lk2olF8gic1U5@mid.uni-berlin.de>
	<1190454275.282176.90830@k79g2000hse.googlegroups.com>
Message-ID: <5lkbr8F8gic1U6@mid.uni-berlin.de>

On Sat, 22 Sep 2007 02:44:35 -0700, Kay Schluehr wrote:

> I checked out Io once and I disliked it. I expected Io's prototype OO
> being just a more flexible variant of class based OO but Io couples a
> prototype very closely to its offspring. When A produces B and A.f is
> modified after production of B also B.f is modified.  A controls the
> state of B during the whole lifetime of B. I think parents shall not
> do this, not in real life and also not in programming language
> semantics.

Well it's like Python: inherited slots (attributes) are looked up in the
ancestors.  It should be easy to override `Object clone` in Io, so all
slots of the ancestor are shallow copied to the clone, but I guess this
might break existing code.  At least for your own code you could introduce
a `realClone` slot.

Ciao,
	Marc 'BlackJack' Rintsch


From lasses_weil at klapptsowieso.net  Thu Sep 13 15:56:00 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Thu, 13 Sep 2007 21:56:00 +0200
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <46e9921e$0$26251$426a74cc@news.free.fr>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189604018.520338.162520@57g2000hsv.googlegroups.com>
	<mailman.486.1189693844.2658.python-list@python.org>
	<13eim00ha4lf356@corp.supernews.com>
	<Xns99AA68B097778OKB@199.45.49.11>
	<5ktfb5F5ctrvU1@mid.individual.net>
	<46e98e01$0$30383$9b4e6d93@newsspool4.arcor-online.net>
	<46e9921e$0$26251$426a74cc@news.free.fr>
Message-ID: <46e995d1$0$16120$9b4e6d93@newsspool1.arcor-online.net>

Bruno Desthuilliers wrote:
> OTHO, simple math-illeterate programmers like me will have hard time 
> maintaining such a code.
Certainly, but again: Such main people are not the intended audience. 
The code is for people that know how to read these equations. I think a 
general rule of (any form of) writing is to write with your audience in 
mind. I always do that and happily, that audience is usually naked.



> Also and FWIW, it's not always possible to make 
> a direct translation of a mathematic formula|algorithm in Python, and 
> even when it is, it's not always the best thing to do wrt/ perfs (I 
> recently had such a case, and after a pythonic rewrite the code was 
> about 75% shorter, 50% faster, and 200% more readable for average joe 
> programmer).
> 
Your point. Different game, but still your point. ;)


>> ... my 2 sents, anyway ...
> 
> May I add my 2 cents - or should I send them  ?-)
> 
No, actually you're supposed to smell them. Oh, how I love homophones!

/W


From grante at visi.com  Sat Sep 15 18:36:08 2007
From: grante at visi.com (Grant Edwards)
Date: Sat, 15 Sep 2007 22:36:08 -0000
Subject: how to join array of integers?
References: <1189859762.563599.269270@g4g2000hsf.googlegroups.com>
	<a23effaf0709150551g19c611eqe1c912acf02306d3@mail.gmail.com>
	<46EBE498.9040800@ehas.org>
	<mailman.583.1189872945.2658.python-list@python.org>
	<13eo1rb73mg8b77@corp.supernews.com>
	<mailman.587.1189882295.2658.python-list@python.org>
Message-ID: <13eoniohphkjs95@corp.supernews.com>

On 2007-09-15, Robert Kern <robert.kern at gmail.com> wrote:
> Grant Edwards wrote:
>> On 2007-09-15, Erik Jones <erik at myemma.com> wrote:
>> 
>>>>> print ''.join([str(i) for i in [1,2,3]])
>>>> It's better to use generator comprehension instead of LC:
>>>>
>>>> ",".join(str(i) for i in [1, 2, 3])
>>> Why is that?  That entire expression must be evaluated to
>>> obtain the result, so what is the advantage of using a
>>> generator comprehension v. a list comprehension?
>> 
>> The generator avoids creating the intermediate list -- it
>> generates the intermediate values on the fly. For short
>> sequences it probably doesn't matter much.  For a very long
>> list it's probably noticable.
>
> Not true. str.join() creates a list from the iterator if it is
> not already a list or a tuple.

So the iterator avoids creating an intermediate list, but the
join method goes ahead and does it anyway?

> In Objects/stringobject.c, look at string_join(); it calls
> PySequence_Fast() on the argument. Looking in
> Objects/abstract.c, we see that PySequence_Fast()
> short-circuits lists and tuples but builds a full list from
> the iterable otherwise.

So what's the point of iterables if code is going to do stuff
like that when it wants to iterate over a sequence?

> map() seems to reliably be the fastest option,

Which is apparently going away in favor of the slower iterator
approach?

> and list comprehensions seem to slightly edge out generator
> comprehensions if you do the timings.

-- 
Grant Edwards                   grante             Yow!  Clear the
                                  at               laundromat!! This
                               visi.com            whirl-o-matic just had a
                                                   nuclear meltdown!!


From __peter__ at web.de  Sat Sep 29 07:36:26 2007
From: __peter__ at web.de (Peter Otten)
Date: Sat, 29 Sep 2007 13:36:26 +0200
Subject: question about for cycle
References: <mailman.1275.1191060311.2658.python-list@python.org>
	<1191062383.322949.55300@d55g2000hsg.googlegroups.com>
Message-ID: <fdldbp$i45$03$1@news.t-online.com>

Ant wrote:

> On Sep 29, 11:04 am, "fdu.xia... at gmail.com" <fdu.xia... at gmail.com>
> wrote:
> ...
>> What should I do if I want the outer "for" cycle to continue or break ? If I
>> put a "continue" or "break" in the inner cycle, it has no effect on the outer
>> cycle.
> 
> I'd also be interested in the idiomatic solution to this one. I can
> see a number of solutions, from the ugly:
> 
> for i in range(10):
>     do_break = True
>     for j in range(10):
>        if j == 6:
>           break
>     else:
>        do_break = False
> 
>     if do_break:
>        break

Here's a variant that doesn't need the flag

>>> inner = "abc"
>>> outer = "xbz"
>>> for i in outer:
...     for k in inner:
...             if i == k:
...                     print "found", i
...                     break
...     else:
...             print i, "not found"
...             continue
...     break
... 
x not found
found b
 
but I usually prefer a helper function like this

> def get_value():
>   for i in range(10):
>     for j in range(10):
>        print i, j
>        if j == 6:
>           return fn(i, j)

or this:

>>> def f(i, inner):
...     for k in inner:
...             if i == k:
...                     print "found", i
...                     return True
... 
>>> for i in outer:
...     if f(i, inner):
...             break
...     print i, "not found"
... 
x not found
found b

Peter


From m.n.summerfield at googlemail.com  Fri Sep 14 05:07:36 2007
From: m.n.summerfield at googlemail.com (Mark Summerfield)
Date: Fri, 14 Sep 2007 09:07:36 -0000
Subject: An ordered dictionary for the Python library?
In-Reply-To: <1189753968.917636.310120@19g2000hsx.googlegroups.com>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<7xzlzrtrjn.fsf@ruckus.brouhaha.com>
	<1189664832.876539.86800@k79g2000hse.googlegroups.com>
	<7xps0mmig9.fsf@ruckus.brouhaha.com>
	<1189733708.659317.83950@y42g2000hsy.googlegroups.com>
	<1189753968.917636.310120@19g2000hsx.googlegroups.com>
Message-ID: <1189760856.449420.60750@y42g2000hsy.googlegroups.com>

I forgot one item in the proposed API:

ordereddict.delete(index : int)

Also, the API for keys() should be

ordereddict.keys(firstindex : int = None, secondindex : int = None)

If called with no args, returns list of all keys (in key order of
course); if one arg is given, returns keys with indexes in range(0,
firstindex); if two args are given, returns keys with indexes in
range(firstindex, secondindex).

Below is a stripped-down implementation in pure python that is just 84
lines long.
(I have a proper version with blank lines and doctests which is 482
lines but I thought that was a bit long to post.)

It should work as a drop-in replacement for dict (apart from
performance), but with the keys ordered by <, so that every list or
iterator that it returns is always in key order.

The get(), has_key(), __contains__(), len(), and __getitem__() methods
are not reimplemented because the base class versions work fine.

I'm only posting it to give a better feel for the API---if someone did
a better (faster) implementation (e.g., in C), that'd be great, but
best to get consensus on an API first I think (if consensus is
possible at all!).

import bisect
class ordereddict(dict):
    def __init__(self, *args, **kwargs):
        dict.__init__(self, *args, **kwargs)
        self.__keys = sorted(dict.keys(self))
    def update(self, *args, **kwargs):
        dict.update(self, *args, **kwargs)
        self.__keys = sorted(dict.keys(self))
    @classmethod
    def fromkeys(cls, iterable, value=None):
        dictionary = cls()
        for key in iterable:
            dictionary[key] = value
        return dictionary
    def key(self, index):
        return self.__keys[index]
    def item(self, index):
        key = self.__keys[index]
        return key, self[key]
    def value(self, index):
        return self[self.__keys[index]]
    def set_value(self, index, value):
        self[self.__keys[index]] = value
    def delete(self, index):
        key = self.__keys[index]
        del self.__keys[index]
        dict.__delitem__(self, key)
    def copy(self):
        dictionary = ordereddict(dict.copy(self))
        dictionary.__keys = self.__keys[:]
        return dictionary
    def clear(self):
        self.__keys = []
        dict.clear(self)
    def setdefault(self, key, value):
        if key not in self:
            bisect.insort_left(self.__keys, key)
        return dict.setdefault(self, key, value)
    def pop(self, key, value=None):
        if key not in self:
            return value
        i = bisect.bisect_left(self.__keys, key)
        del self.__keys[i]
        return dict.pop(self, key, value)
    def popitem(self):
        item = dict.popitem(self)
        i = bisect.bisect_left(self.__keys, item[0])
        del self.__keys[i]
        return item
    def keys(self, firstindex=None, secondindex=None):
        if firstindex is not None and secondindex is None:
            secondindex = firstindex
            firstindex = 0
        else:
            if firstindex is None:
                firstindex = 0
            if secondindex is None:
                secondindex = len(self)
        return self.__keys[firstindex:secondindex]
    def values(self):
        return [self[key] for key in self.__keys]
    def items(self):
        return [(key, self[key]) for key in self.__keys]
    def __iter__(self):
        return iter(self.__keys)
    def iterkeys(self):
        return iter(self.__keys)
    def itervalues(self):
        for key in self.__keys:
            yield self[key]
    def iteritems(self):
        for key in self.__keys:
            yield key, self[key]
    def __delitem__(self, key):
        i = bisect.bisect_left(self.__keys, key)
        del self.__keys[i]
        dict.__delitem__(self, key)
    def __setitem__(self, key, value):
        if key not in self:
            bisect.insort_left(self.__keys, key)
        dict.__setitem__(self, key, value)
    def __repr__(self):
        return "ordereddict({%s})" % ", ".join(
               ["%r: %r" % (key, self[key]) for key in self.__keys])



From martin at v.loewis.de  Mon Sep 24 16:13:02 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 24 Sep 2007 22:13:02 +0200
Subject: Building Python with VC8 on x64 Vista
In-Reply-To: <1190646833.144905.40030@19g2000hsx.googlegroups.com>
References: <1190299551.573204.322440@57g2000hsv.googlegroups.com>
	<46F52FFD.3040500@v.loewis.de>
	<1190646833.144905.40030@19g2000hsx.googlegroups.com>
Message-ID: <46F81A4E.4030101@v.loewis.de>

> It doesn't look like these are x86, though. 

Ok. Can you then check symbol lists also?: undefined
symbols in the object file, and defined symbols in the
library, wrt. PyExc_IndexError (say).

Regards,
Martin


From __peter__ at web.de  Mon Sep 24 03:13:40 2007
From: __peter__ at web.de (Peter Otten)
Date: Mon, 24 Sep 2007 09:13:40 +0200
Subject: scope, modyfing outside object from inside the method
References: <fd7m9s$9fe$1@news2.task.gda.pl>
Message-ID: <fd7o33$g14$02$2@news.t-online.com>

Marcin St?pnicki wrote:

> Hello.
> 
> I thought I understand this, but apparently I don't :(. I'm missing
> something very basic and fundamental here, so redirecting me to the
> related documentation is welcomed as well as providing working code :).
> 
> Trivial example which works as expected:
> 
>>>> x = {'a':123, 'b': 456}
>>>> y = x 
>>>> x['a']=890
>>>> y
> {'a': 890, 'b': 456}
> 
> Now, let's try something more sophisticated (it's not real world example,
> I've made up the problem which I think illustrates my issue). Let's say
> I've got such a structure:
> 
> results = [ {'a': 12, 'b': 30 },
>             {'a': 13, 'b': 40 } ]
> 
> I'd like to have each row and column in separate object of self-made
> classes.:
> 
> class mycolumn():
>   def __init__(self, resultset, row, col):
> 	self.value = resultset[row][col]
>   def __str__(self):
> 	return 'Column value: %s' % self.value
> 
> class myrow():
>   def __init__(self):
> 	self.container = {}
>   def __str__ (self):
> 	return self.container
> 
> results = [
> 	{'a': 12, 'b' :30 },
>         {'a': 13, 'b' :40 } 
> ]
> 
> mystruct = []
> 
> for row in results:
> 	mystruct.append ( myrow() )
> 	for col in row:
>  	       	mystruct [len(mystruct)-1].container[col] = \
> 			 mycolumn(results, results.index(row), col)
> 
> print mystruct[0].container['b'] # 12
> results[0]['b'] = 50             # 
> print mystruct[0].container['b'] # also 12 :/
> 
> In other words, I'd like to "map" the results to myrow and mycolumn
> objects, and have these new objects' values changed when I change "results".

Instead of copying a value, you can tell your objects where to look it up.
Your mycolumn class would then become

class MyColumn(object):
    def __init__(self, resultset, row, col):
        self._resultset = resultset
        self._row = row
        self._col = col
    @property
    def value(self):
        return self._resultset[self._row][self._col]
    def __str__(self):
    	return 'Column value: %s' % self.value

Peter


From gagsl-py2 at yahoo.com.ar  Thu Sep 13 02:09:09 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 13 Sep 2007 03:09:09 -0300
Subject: Setting stdout encoding
References: <1189416350.069995.220250@w3g2000hsg.googlegroups.com>
	<cfb578b20709100602i4146f5c0hd2a1343f644a90f@mail.gmail.com>
	<op.tygmb9nux6zn5v@gabriel2.softlabbsas.com.ar>
	<cfb578b20709110358n5801c19ie21d95ef1161e4c0@mail.gmail.com>
Message-ID: <op.tykwpjijx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 11 Sep 2007 07:58:03 -0300, Fabio Zadrozny <fabiofz at gmail.com>  
escribi?:

>> You could place code like that on sitecustomize.py
>> I think this should be fixed on Eclipse/pydev. If they replace  
>> sys.stdout
>> with a different object - they should make sure it has the right  
>> behavior.
>> Same for IDLE if it's broken too.
>>
>
> Thanks for the tip... I wasn't aware of sitecustomize.py (site.py does  
> call
> that just before removing setdefaultencoding() from sys, so I can still  
> use
> sys.setdefaultencoding)... actually, setencoding() from site.py does have
> what I would like to execute:
>     if 0:
>         # Enable to support locale aware default string encodings.
>         import locale
>         loc = locale.getdefaultlocale()
>         if loc[1]:
>             encoding = loc[1]
>
> I just don't get why the code has that "if 0:" instead of getting it from
> some user-config (like env variable or parameters passed)...
>
> Anyways, thanks a lot... I think I can arrange in providing a
> sitecustomize.py from pydev with that structure.

But I don't think it's a good idea. Changing the default encoding will  
change it for *all* scripts, *all* users, *all* objects. And AFAIK you  
have trouble ONLY with sys.std* - one should fix those objects, not mess  
with a global configuration.

-- 
Gabriel Genellina



From perl4hire at softouch.on.ca  Sat Sep 15 10:18:24 2007
From: perl4hire at softouch.on.ca (Amer Neely)
Date: Sat, 15 Sep 2007 10:18:24 -0400
Subject: Coming from Perl
In-Reply-To: <A7KGi.8106$z_5.484@nlpi069.nbdc.sbc.com>
References: <Cv%Fi.198$372.59@read2.cgocable.net>	<1189644803.816375.269950@y42g2000hsy.googlegroups.com>	<b46Gi.221$372.100@read2.cgocable.net>	<87y7fa52ru.fsf@benfinney.id.au>	<jWaGi.224$372.55@read2.cgocable.net>	<mailman.485.1189691416.2658.python-list@python.org>	<d9cGi.356$372.131@read2.cgocable.net>	<mailman.489.1189695918.2658.python-list@python.org>	<iPcGi.357$372.115@read2.cgocable.net>
	<mailman.490.1189698752.2658.python-list@python.org>
	<KgdGi.2174$tx1.172@read1.cgocable.net>
	<A7KGi.8106$z_5.484@nlpi069.nbdc.sbc.com>
Message-ID: <oPRGi.2430$tx1.886@read1.cgocable.net>

Bryan Olson wrote:
> Amer Neely wrote:
>> This seems to indicate that maybe my host needs to configure Apache to 
>> run python scripts? But I didn't need to do anything with mine.
> 
> Another possibility: If it works on Windows but not Unix, check
> the end-of-line characters. Windows ends each line with the two
> character sequence carriage-return + newline, which in Python
> is "\r\n". Unix uses newline alone, "\n".
> 
> Most Unixies will choke on a #! line with a carriage return.
> The Python interpreter will accept source files with either
> end-of-line on either system, but of course you'll not get
> that far unless the operating system respects the shebang line.
> 
> Maybe you already checked that. Hmmm...other possiblities...
> 
> Do you have shell access? Can you executing it directly from
> the shell? Do you get a Python error, or some other?
> 
> Did you:  chmod ugo+rx <yourscript>
> 
> Is Python in /usr/bin? What does "which python" say?
> 
> Generally, most experts seem to prefer:
> 
>     #!/usr/bin/env python
> 
> You might try changing the the extension of your script from .py
> to .cgi. Windows uses the .py to choose the executable, but Unix
> does not care; it used the shebang line.
> 
> 

I tried `which python` and `whereis python` and got 0 back as a result. 
So it seems Python is not installed at all.

-- 
Amer Neely
w: www.webmechanic.softouch.on.ca/
Perl | MySQL programming for all data entry forms.
"Others make web sites. We make web sites work!"


From super.sgt.pepper at gmail.com  Fri Sep 21 19:02:21 2007
From: super.sgt.pepper at gmail.com (Cristian)
Date: Fri, 21 Sep 2007 23:02:21 -0000
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <mailman.900.1190414696.2658.python-list@python.org>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<mailman.900.1190414696.2658.python-list@python.org>
Message-ID: <1190415741.380795.259050@y42g2000hsy.googlegroups.com>

On Sep 21, 3:44 pm, Ron Adam <r... at ronadam.com> wrote:

> I think key may be to discuss names and name binding with your friend.  How
> a name is not the object it self, like a variable is in other languages.
> For example show him how an object can have more than one name.  And discus
> how names can be bound to nearly anything, including classes and functions.

I could discuss name binding but it would be great if Python said this
itself. After all, you can even bind a module with the foo = bar
syntax by using __import__ function. If function definitions followed
the same pattern, I think a beginner would subconsciously (maybe even
consciously) realize that function names are just like everything
else. Actually, this would be helpful for many people. If you come
from a language like Java you're used to thinking of attributes and
methods as living in different namespaces. I think a new syntax will
encourage seasoned programmers think in a more Pythonic way.

Python has done a very good job in easing people into programming. My
friend doesn't come to me very often because the syntax is clear and
simple and the builtin datatypes allow you to do so much. My goal is
that I would never have to explain to him about name binding; that
he'd pick it up by learning the language on his own. He's learned
lists, dictionaries and even some OOP without me. I don't think name
binding would be a stretch.

> You could also discus factory functions with him.  Once he gets that a
> function can return another function, then it won't be so much of a leap
> for a function to take a function as an argument.

I think this isn't the most intuitive way of approaching first order
functions. It's true that if a function can return another function
then a function must be first order (i.e., it's just like any other
variable), but that seems almost backwards to me. I think it would
make more sense to have beginners _know_ that functions are like all
other variables and can therefore be passed by other functions or
returned by other functions. That I think would be better accomplished
if they define functions the same way you would define other variables
that you know can be passed and returned.




From steve at holdenweb.com  Mon Sep 17 19:51:36 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 17 Sep 2007 19:51:36 -0400
Subject: adodb with mysql - connection string syntax for filepath
In-Reply-To: <46EF0BEF.3070807@sdf.lonestar.org>
References: <33dffc910709162342x49657895t938fb1f8af2834de@mail.gmail.com>
	<46EF0BEF.3070807@sdf.lonestar.org>
Message-ID: <fcn3u6$q3p$2@sea.gmane.org>

J. Cliff Dyer wrote:
> Mridula Ramesh wrote:
>> Dear all,
>>
>> Hi. I am not very tech-savvy so please pardon me if this is a stupid
>> question: so far I have been googling for about 4 days to find help
>> for this, so now I am desperate! :)
>>
>> How do you use adodb with mysql to connect to a file that is on your
>> machine?
>>
> I'm not quite sure what you mean by this.  MySQL won't connect you to a
> file on your machine.  It will connect you to a database server, which
> will possibly access files on your machine, but could just as easily
> access an in-memory database, that isn't stored in any files.
> 
> I've also never worked with adodb, but if you use MySQLdb, you do the
> following:
> 
> import MySQLdb as db
> 
> cur = db.connect(host='127.0.0.1', #or whatever your hosts address is
>                  user=username,
>                  passwd=password,
>                  db=database).cursor()
> cur.execute('SELECT * FROM table')
> cur.fetchall()
> 
> If adodb is dbapi 2 compliant, it may be as simple as s/MySQLdb/adodb/
> 
It won't be quite that simple, as adodb requires connection strings.

A good place to start would be

   http://www.carlprothman.net/Default.aspx?tabid=81

>> Also, could you please recommend to me a good resource to learn more
>> about classes and modules from? i don't understand half of the _init_
>> business that many sites mention. (This *is* something even a newbie
>> needs to learn, right?)
>>
> Try this chapter from Diving into Python:
> 
> http://www.diveintopython.org/object_oriented_framework/defining_classes.html
>> Thank you!
>>
Dive Into Python might seem intimidating at first glance, but it's worth 
persevering with.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From larry.bates at websafe.com  Mon Sep 17 11:08:30 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Mon, 17 Sep 2007 10:08:30 -0500
Subject: Processing drag & drop on the desktop
In-Reply-To: <1189961614.510561.194610@w3g2000hsg.googlegroups.com>
References: <1189961614.510561.194610@w3g2000hsg.googlegroups.com>
Message-ID: <1uSdnaNGwMvgBXPbnZ2dnUVZ_tjinZ2d@comcast.com>

Pierre Quentel wrote:
> Hi all,
> 
> I would like to create an application on a Windows machine, such that
> when a document is dragged and dropped on the application icon on the
> desktop, the document is processed by the application
> 
> For instance, if I drag & drop an Outlook message or a PPT
> presentation, the application would propose to tag the document with
> keywords taken from a database
> 
> Is it possible to do this with a Python script, and how ?
> 
> Regards,
> Pierre
> 
If you write a python application and put a shortcut on the desktop, when you 
drop any file on it in Windows it is passed into the program via the sys.argv 
list as the second (e.g. sys.argv[1]) argument.  If you drop multiple files, 
they are passed in sys.argv[1] sys.argv[n].  All you need to do is to pick up
the filename and do your processing.

-Larry


From bdesth.quelquechose at free.quelquepart.fr  Mon Sep 17 07:00:04 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 17 Sep 2007 13:00:04 +0200
Subject: adding a static class to another class
In-Reply-To: <mailman.629.1189984482.2658.python-list@python.org>
References: <mailman.629.1189984482.2658.python-list@python.org>
Message-ID: <46eef7d2$0$13879$426a74cc@news.free.fr>

Nathan Harmston a ?crit :
> HI,
> 
> I m trying to start an api in a similar way to the djangic way of
> Class.objects.all(). Ie objects is a "Manager" class.
> 
> So:
> 
> class Foo(object):
>    def __init__(self):
>         self.test = "NEE"
> 
> class Manager(object):
>     def __init__(self):
>         pass
>    def all(self):
>        return "COCONUTS"
> 
> Because of how some of the code is set up I cant use
> metaclasses........so I try to use a decorator:
> 
> def addto(instance):
>     def decorator(f):
>         import new
>         f = new.instancemethod(f, instance, instance.__class__)
>         setattr(instance, "objects", f)
>         return f
>     return decorator
> 
> class Manager(object):
>     @addto(Foo)
>     def __init__(self):
>        .............
> 
> however this only binds the init method to the Foo.objects, so not
> what I want. 

Indeed.

> If I try using classmethod...then it just says the
> Foo.objects doesnt exist.

You mean decorating Manager.__init__ with classmethod ???

I may be wrong, but I suspect you don't have a clear idea of what you're 
doing here.

> Does anyone have any ideas how I can accomplish this using decorators?

Yes : don't use a decorator !-)

Instead of asking for how to implement what you think is the solution, 
you might be better explaining the problem you're trying to solve.

> And also preventing more than one Manager instance instantiated at one
> time.

Q&D:

class Singleton(object):
     def __new__(cls):
         if not hasattr(cls, '_inst'):
             cls._inst = object.__new__(cls)
         return cls._inst
	

Same remark as above...


From steve at holdenweb.com  Sat Sep  1 11:49:20 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 01 Sep 2007 11:49:20 -0400
Subject: Important Research Project
In-Reply-To: <fbbu5a$a8v$1__29393.5967762538$1188658309$gmane$org@news.xmission.com>
References: <13ddcvm1bsu3s94@corp.supernews.com>
	<46D6CA0E.E66ED5C8@yahoo.com>	<13deq9nj9atft62@corp.supernews.com>	<lnsl60o492.fsf@nuthaus.mib.org>
	<fbbu5a$a8v$1__29393.5967762538$1188658309$gmane$org@news.xmission.com>
Message-ID: <fbc1m6$ja3$1@sea.gmane.org>

Kenny McCormack wrote:
> In article <lnsl60o492.fsf at nuthaus.mib.org>,
> Keith Thompson  <kst-u at mib.org> wrote:
>> "E.D.G." <edgrsprj at ix.netcom.com> writes:
>>> "CBFalconer" <cbfalconer at yahoo.com> wrote in message
>>> news:46D6CA0E.E66ED5C8 at yahoo.com...
>>>> "E.D.G." wrote:
>>>> Where is Perl described in the C standard?  This seems rather OT.
>>> It has been my experience that a person who is an expert with one computer
>>> language can usually do reasonably well when working with other languages.
>>> I am trying to find some people who can assist with getting a Perl program
>>> running.  It would probably be easier for expert programmers in any language
>>> to help with this type of work compared with people such as myself who are
>>> not experts in any programming language.
>> CBFalconer's point is that this newsgroup (comp.lang.c, where he and I
>> are both reading this) is for discussion of the C programming
>> language.  If you want to discuss something other than C, please find
>> another forum.  Massive cross-posts like this are rarely appropriate.
> 
> IOW (for the OP and for the various readers in all these groups):
> 
> 	The rod up Keith's butt has a rod up its butt.
> 
> Note, incidentally, that this thread is yet the latest occurrence of a
> phenomenon that I've observed many times in the past, and have
> described here in clc on more than a few occasions.  That is, somebody
> starts a thread, posted to several different groups, in the hope of
> getting help from at least one of them.  The thread is pretty much
> on-topic for most of the groups, primarily because the keepers of most
> of the groups do not have rods up their butts.
> 
> However, and this is the big however, one of the groups listed just
> happens to be clc, where rod-filled butts are the norm.  The result is
> that all of the responses come from clc (including, of course, this one)
> and, as we see, it's all topicality BS, and nobody ever ends up
> discussing the original subject.   Really a pity, that.
> 
Well I am reading your response "here" on c.l.py, where there are no 
keepers because the lunatics have taken over the asylum. If clc has to 
deal with attitudes like yours then it seems there are two sides to the 
problem. Your own behavior would also be considered marginally 
acceptable, containing as it does an unsubstantiated ad hominem attack.

Quite what you think you were doing to encourage the thread back 
on-topic I have no idea. While the OP may have been uninformed about the 
nature of usenet, at least he made his request in a polite and 
unobjectionable fashion. He received some good advice together with a 
certain amount of predictable but probably not fully-deserved hostility.

Everybody makes mistakes. Just let them go by and give your fingers a 
rest. You can't police everyone, and you would be foolish to try. Save 
your efforts for the real trolls like Xah Lee, or are you fortunate 
enough to miss his folk wisdom on clc?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From b83503104 at yahoo.com  Sun Sep 30 10:11:50 2007
From: b83503104 at yahoo.com (bahoo)
Date: Sun, 30 Sep 2007 14:11:50 -0000
Subject: notify when process finishes (on unix)
Message-ID: <1191161510.764656.244540@57g2000hsv.googlegroups.com>

Hi,

I'd like to write a script that sends me an email when a unix (Linux)
process ends running (or CPU drops below some threshold).  Could
anyone point me to the relevant functions, or show me an example?

Thanks
bahoo



From ldo at geek-central.gen.new_zealand  Sun Sep  9 22:59:59 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 10 Sep 2007 14:59:59 +1200
Subject: Python syntax wart
References: <fbvvil$7dj$1@lust.ihug.co.nz> <5khuq4F3ij9eU1@mid.individual.net>
Message-ID: <fc2bvf$i1l$2@lust.ihug.co.nz>

In message <5khuq4F3ij9eU1 at mid.individual.net>, Bjoern Schliessmann wrote:

> What's wrong with this:
> 
> for Link in GetEachRecord(

Then you're no longer showing the syntax structure in two dimensions.



From Caseyweb at gmail.com  Fri Sep 28 13:03:56 2007
From: Caseyweb at gmail.com (Casey)
Date: Fri, 28 Sep 2007 17:03:56 -0000
Subject: getopt with negative numbers?
In-Reply-To: <871wcj4ib9.fsf@benfinney.id.au>
References: <1190913250.198794.269530@k79g2000hse.googlegroups.com>
	<fdgpic$ssu$00$1@news.t-online.com>
	<1190915197.390247.313590@57g2000hsv.googlegroups.com>
	<fdgri5$ssu$00$2@news.t-online.com>
	<mailman.1182.1190917341.2658.python-list@python.org>
	<1190930134.780005.68510@22g2000hsm.googlegroups.com>
	<mailman.1196.1190937544.2658.python-list@python.org>
	<1190944143.521085.66910@g4g2000hsf.googlegroups.com>
	<871wcj4ib9.fsf@benfinney.id.au>
Message-ID: <1190999036.588941.165610@g4g2000hsf.googlegroups.com>

On Sep 27, 10:47 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> I believe they shouldn't because the established interface is that a
> hyphen always introduced an option unless (for those programs that
> support it) a '--' option is used, as discussed.
Not "THE" established interface; "AN" established interface.  There
are other established interfaces that have different behaviors. I'm a
pragmatist; I write software for users, not techies.  I suspect most
users would expect a command like "abc -a -921 351 175" to treat the
"-921" as a negative integer and not abort the program with some
obscure error about option 921 not being known.
>
> > But I think it is a simple and clever hack and still allows getopt
> > or optparse to function normally.
>
> Except that they *don't* function normally under that hack; they
> function in a way contradictory to the normal way.
Again, it depends on who is defining "normal" and what they are basing
it on. I suspect many (probably most) users who are familiar with
command line input are unaware of the "--" switch which was mainly
designed to support arbitrary arguments that might have an initial
hyphen, a much broader problem than supporting negative values.  I'm
not asking that the default behavior of getopt or optparse change;
only that they provide an option to support this behavior for those of
us who find it useful. Software libraries should be tools that support
the needs of the developer, not rigid enforcers of arbitrary rules.



From BjornSteinarFjeldPettersen at gmail.com  Thu Sep 20 01:37:30 2007
From: BjornSteinarFjeldPettersen at gmail.com (thebjorn)
Date: Thu, 20 Sep 2007 05:37:30 -0000
Subject: super() doesn't get superclass
In-Reply-To: <1190209294.584372.173410@o80g2000hse.googlegroups.com>
References: <8764281uea.fsf@benfinney.id.au>
	<13f196qktorgc88@corp.supernews.com>
	<873axbxl2f.fsf@benfinney.id.au>
	<MKD*JIeVr@news.chiark.greenend.org.uk>
	<1190209294.584372.173410@o80g2000hse.googlegroups.com>
Message-ID: <1190266650.894172.234710@57g2000hsv.googlegroups.com>

On Sep 19, 3:41 pm, Michele Simionato <michele.simion... at gmail.com>
wrote:
> On Sep 19, 3:22 pm, Sion Arrowsmith <si... at chiark.greenend.org.uk>
> wrote:
>
> > Ben Finney  <bignose+hates-s... at benfinney.id.au> wrote:
>
> > > If a function is named 'super' and operates on
> > >classes, it's a pretty strong implication that it's about
> > >superclasses.
>
> > But it doesn't (under normal circumstances) operate on classes.
> > It operates on an *instance*. And what you get back is a (proxy
> > to) a superclass/ancestor of the *instance*.
>
> > (And in the super(A, B) case, you get a superclass/ancestor of
> > *B*. As has just been said somewhere very near here, what is
> > misleading is the prominence of A, which isn't really the most
> > important class involved.)
>
> Happily A (and B too) will become invisible in Python 3000.
>
>     Michele Simionato

This is great news! Since it is for Py3K it seems clear to me that
super should be a keyword as well (but historically I'm not the best
at channeling Guido ;-)

-- bjorn





From orsenthil at gmail.com  Thu Sep  6 23:45:44 2007
From: orsenthil at gmail.com (O.R.Senthil Kumaran)
Date: Fri, 7 Sep 2007 09:15:44 +0530
Subject: ??????urllib post????????????
In-Reply-To: <0665EB55-E95B-4DEA-876B-E6DD95228137@abrahamsen.com>
References: <1188993813.330662.174660@w3g2000hsg.googlegroups.com>
	<20070906024041.GA6599@gmail.com>
	<0665EB55-E95B-4DEA-876B-E6DD95228137@abrahamsen.com>
Message-ID: <20070907034544.GB3519@gmail.com>

* Eric Abrahamsen <eric at abrahamsen.com> [2007-09-06 11:18:29]:

> It's in Chinese, so ASCII is no go. If anyone's interested in  
> answering his question (he's trying to download a linked file using  
> the post method from urllib tools, not something I know about) I can  

Python doc explains urllib post method:
http://docs.python.org/lib/module-urllib.html

import urllib
>>> params = urllib.urlencode({'spam': 1, 'eggs': 2, 'bacon': 0})
>>> f = urllib.urlopen("http://www.musi-cal.com/cgi-bin/query", params)
>>> print f.read()

Hope this helps.

- 
Senthil

> On Sep 6, 2007, at 10:40 AM, O.R.Senthil Kumaran wrote:
> 
> > If possible, please post your query in ASCII.
> >
> > -- 
> > Senthil
> >
> >
> > * liangxuliang79 at gmail.com <liangxuliang79 at gmail.com> [2007-09-05  
> > 05:03:33]:
> >
> >> ????www.mmmppp333.com??????????http://ishare.iask.sina.com.cn/cgi- 
> >> bin/
> >> fileid.cgi?fileid=844050
> >> ??????post fileid=844050????????
> >>
> >> ????post????????????fileid=844050??????server??????????header?? 
> >> header????local????location????
> >> ?????????????????????????????????????????????? 
> >> mp3????????????????????????????local???????????? 
> >> mp3??????????????????????????????????
> >> ??????????????????????????????
> >>
> >> ??????????????python??urllib????????urllib??????????????????????? 
> >> local????????????????local????????mp3????????
> >> ????????????????mp3.??
> >>
> >> ??post????????/download.php?? post???????? 
> >> fileid=844050????????????????????????????????????????????????????
> >> ????????????????????web??????????????????????
> >> -- 
> >> http://mail.python.org/mailman/listinfo/python-list
> > -- 
> > O.R.Senthil Kumaran
> > http://uthcode.sarovar.org
> > -- 
> > http://mail.python.org/mailman/listinfo/python-list
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list

-- 
O.R.Senthil Kumaran
http://uthcode.sarovar.org


From carsten at uniqsys.com  Sat Sep  8 13:28:10 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Sat, 08 Sep 2007 13:28:10 -0400
Subject: /dev/null as a file-like object, or logging to nothing
In-Reply-To: <87k5r1jdzq.fsf@wilson.homeunix.com>
References: <87k5r1jdzq.fsf@wilson.homeunix.com>
Message-ID: <1189272490.3094.11.camel@localhost.localdomain>

On Sat, 2007-09-08 at 18:52 +0200, Torsten Bronger wrote:
> Hall?chen!
> 
> Is there a portable and simply way to direct file-like IO to simply
> nothing?  I try to implement some sort of NullLogging by saying
> 
> --8<---------------cut here---------------start------------->8---
> import logging
> if options.logging:
>     logging.basicConfig(level=logging.DEBUG, filename=options.logfile, filemode="w",
>                         format='%(asctime)s %(name)s %(levelname)s   %(message)s')
> else:
>     # redirect logging to a memory buffer in order to simply ignore it.
>     import StringIO
>     logging.basicConfig(stream=StringIO.StringIO())
> --8<---------------cut here---------------end--------------->8---
> 
> However, this consumes memory.  Is there a better way?

This might work:

class LogSink(object):
    def write(self, *args, **kwargs): pass
    def flush(self, *args, **kwargs): pass

logging.basicConfig(stream=LogSink())

I haven't tested this thoroughly, so it's possible that there are more
methods that the stream is expected to implement.

HTH,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From benyang22 at gmail.com  Mon Sep  3 20:32:23 2007
From: benyang22 at gmail.com (Ben)
Date: Tue, 04 Sep 2007 00:32:23 -0000
Subject: Python is overtaking Perl
Message-ID: <1188865943.238573.218750@w3g2000hsg.googlegroups.com>

Here are the statistics from Google Trends:

http://benyang22a.blogspot.com/2007/09/perl-vs-python.html



From robert.kern at gmail.com  Tue Sep  4 11:13:10 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 04 Sep 2007 10:13:10 -0500
Subject: scipy.org website
In-Reply-To: <46DCE027.1010708@biochem.ucsf.edu>
References: <46DCE027.1010708@biochem.ucsf.edu>
Message-ID: <fbjsmd$66j$1@sea.gmane.org>

Hiten Madhani wrote:
> Hi,
> 
> The scipy.org website has been down. Does anyone know whether it is 
> coming back up?

It is back up now. We're working on making it more stable. We're getting a lot
more traffic than we used to.

  http://projects.scipy.org/pipermail/scipy-user/2007-September/013573.html

-- 
Robert Kern

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



From jstroud at mbi.ucla.edu  Fri Sep 14 16:05:16 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 14 Sep 2007 13:05:16 -0700
Subject: How to Start
In-Reply-To: <1189748073.196112.254870@w3g2000hsg.googlegroups.com>
References: <MPG.215360ba6684d43b9896d5@news.cox.net>
	<1189748073.196112.254870@w3g2000hsg.googlegroups.com>
Message-ID: <fcep5c$hsr$1@daisy.noc.ucla.edu>

Paul McGuire wrote:
> Do "neophytes" just dive in and try stuff?

I think a lot of us coming from other fields actually slithered in, in 
true python style.


From andrew.arobert at gmail.com  Mon Sep  3 10:45:27 2007
From: andrew.arobert at gmail.com (andrew.arobert at gmail.com)
Date: Mon, 03 Sep 2007 14:45:27 -0000
Subject: Automation and scheduling of FrontPage publishing using Python
In-Reply-To: <1188764575.438204.117420@r34g2000hsd.googlegroups.com>
References: <1188517723.279932.299400@x40g2000prg.googlegroups.com>
	<fbamnh$r7q$7@lust.ihug.co.nz>
	<mailman.250.1188620292.28954.python-list@python.org>
	<fbb1lr$evf$5@lust.ihug.co.nz>
	<mailman.255.1188630271.28954.python-list@python.org>
	<fbb3kv$jk5$1@lust.ihug.co.nz>
	<1188698223.393723.151140@d55g2000hsg.googlegroups.com>
	<1188701337.798785.188420@19g2000hsx.googlegroups.com>
	<1188764575.438204.117420@r34g2000hsd.googlegroups.com>
Message-ID: <1188830727.452933.180610@y42g2000hsy.googlegroups.com>

On Sep 2, 4:22 pm, "andrew.arob... at gmail.com"
<andrew.arob... at gmail.com> wrote:
> On Sep 1, 10:48 pm, Jerry <jwe... at gmail.com> wrote:
>
> > andrew,
>
> > I would try looking into Windows automation with Python.http://www.google.com/search?q=windows+automation+pythonshouldget
> > you started.  The winGuiAuto package may help you out as it is like
> > have a human click and move throughout the interface.  The only
> > downside is that there is no recorder to help you build the script, so
> > I would try to do as much in VBA as you can (does FrontPage even
> > support VBA?) and then just write your python script to get through
> > the program enough to execute the macro.
>
> Yes.. Front page can be run by VB macro but I really did not want to
> go down that road if it could be avoided.
>
> This looks very promising.
>
> I've installed the module and run a couple of the basic examples..
>
> Very cool.

After a bit of patience, I was able to get this to work.

Still fine-tuning the process but the basic elements are there.

What is interesting is that once I submitted the proof-of-concept
code, management decided that they would like to see what other
companies are doing for this requirement and weigh the pros/cons of
this approach.






From kar1107 at gmail.com  Wed Sep 19 16:58:03 2007
From: kar1107 at gmail.com (Karthik Gurusamy)
Date: Wed, 19 Sep 2007 20:58:03 -0000
Subject: Sets in Python
In-Reply-To: <CeB*qHeVr@news.chiark.greenend.org.uk>
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
	<CeB*qHeVr@news.chiark.greenend.org.uk>
Message-ID: <1190235483.412972.81280@v23g2000prn.googlegroups.com>

On Sep 19, 6:16 am, Sion Arrowsmith <si... at chiark.greenend.org.uk>
wrote:
> sapsi  <saptarshi.g... at gmail.com> wrote:
> > Why can't lists be hashed?
>
> Several people have answered "because they're mutable" without
> explaining why mutability precludes hashing. So:
>
> Consider a dict (dicts have been in Python a *lot* longer than
> sets, and have the same restriction) which allowed lists as
> keys:
>
> d = {}
> k = [1, 2]
> d[k] = None
>
> Now, if I were to do:
>
> k.append(3)
>
> what would you expect:
>
> d.keys()
>
> to return? Did d magically rehash k when it was modified? Did d[k]
> take a copy of k, and if so, how deep was the copy (consider
> d[[1, k]] = None followed by a modification to k)? Leaving the hash
> unchanged and relying on collision detection to resolve won't work,
> since you may go directly for d[[1, 2, 3]] and not spot that
> there's already an entry for it since it's been hashed under [1, 2].
>
> "Practicality beats purity" and the design decision was to simply
> sidestep these issues by disallowing mutable dict keys. And as the
> set implementation is based on the dict implementation, it applies
> to sets to.

While it's easy to explain the behavior, I think the decision to dis-
allow mutable items as keys is a bit arbitrary. There is no need for
dict to recompute hash (first of all, a user doesn't even need to know
if underneath 'hashing' is used -- the service is just a mapping
between one item to another item).

Since we know hashing is used, all that is needed is, a well-defined
way to construct a hash out of a mutable. "Given a sequence, how to
get a hash" is the problem. If later the given sequence is different,
that's not the dict's problem.

>>> d = {}
a = 10
>>> d[a] = 'foo'
>>> d[5+5] = 'bar'
>>> d[10]
'bar'

aren't the '5+5' which is 10, is different from the previous line's
a?.. so
why not allow similar behavior with lists/other sequence/even other
collections. As long as two objects compare equal the hash-result must
be the same. I guess this takes us to defining the equality operation
for lists-- which I think has a very obvious definition (ie same
length and the ith element of each list compare equal).

So if the list changes, it will result in a different hash and we will
get a hash-miss. I doubt this is in anyway less intuitive than dis-
allowing mutable items as keys.

Karthik


>
> --
> \S -- si... at chiark.greenend.org.uk --http://www.chaos.org.uk/~sion/
>    "Frankly I have no feelings towards penguins one way or the other"
>         -- Arthur C. Clarke
>    her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump




From gandalf at shopzeus.com  Mon Sep 10 12:36:13 2007
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Mon, 10 Sep 2007 18:36:13 +0200
Subject: Question about PEP 8
Message-ID: <46E5727D.6080403@shopzeus.com>


 Hi All,

Here is what I read in PEP 8:

>     Package and Module Names
>
>       Modules should have short, all-lowercase names.  Underscores can be used
>       in the module name if it improves readability.  Python packages should
>       also have short, all-lowercase names, although the use of underscores is
>       discouraged.
>
>       Since module names are mapped to file names, and some file systems are
>       case insensitive and truncate long names, it is important that module
>       names be chosen to be fairly short -- this won't be a problem on Unix,
>       but it may be a problem when the code is transported to older Mac or
>       Windows versions, or DOS.
>
>       When an extension module written in C or C++ has an accompanying Python
>       module that provides a higher level (e.g. more object oriented)
>       interface, the C/C++ module has a leading underscore (e.g. _socket).

Here is my problem. There is ConfigParser, StringIO, Queue, HTMLParser  
etc. They are all part of the standard library. Most of these are 
modules with only a "main class" defined. ConfigParser module contains 
ConfigParser class, Queue module contains Queue class etc. Should I use 
CapWords for the module (and file) name or not? E.g. should I

from mess.wxmegaeidgets.GenericDialog import GenericDialog

or

from mess.wxmegaeidgets.genericdialog import GenericDialog


(suppose that the module contains only the GenericDialog class. BTW, 
will Py3K change the standard library names in order to follow PEP 8?)

I also have problems with function and method names:

>  Function Names
>
>       Function names should be lowercase, with words separated by underscores
>       as necessary to improve readability.
>
>       mixedCase is allowed only in contexts where that's already the
>       prevailing style (e.g. threading.py), to retain backwards compatibility.

Great, but what if I subclass wx widgets? They all have CapWords. 
(wx.Window.ShowModal, wx.Window.Bind etc.) I must use CapitalizedWords 
for method names because sometimes I have to override inherited methods, 
and it is not possible to change their name. Where should be the limit? 
If I create a composite widget then should I use lowercase and 
underscores? If I create a class that is not itself a widget, but works 
with widgets? The PEP defines the "theoretically good" coding style, but 
what is the correct style in an environment where you have third party 
libraries that are not following the PEP?

Thanks,

   Laszlo



From ahmad at baitalmal.com  Wed Sep 19 20:41:34 2007
From: ahmad at baitalmal.com (=?UTF-8?Q?Ahmad_=E3=8B=A1_Baitalmal?=)
Date: Wed, 19 Sep 2007 17:41:34 -0700
Subject: python-mcrypt install on Mac OSX
Message-ID: <56DAC153-975E-4C02-9EFD-B8F1394244C1@baitalmal.com>

Hi,
I'm having a hard time getting python-mcrypt extension to build.
I installed libmcrypt with --prefix=/usr and I checked that the  
library exists

-rwxr-xr-x   1 root  wheel    352K Sep 19 16:53 /usr/lib/libmcrypt. 
4.4.8.dylib*
lrwxr-xr-x   1 root  wheel     21B Sep 19 16:53 /usr/lib/libmcrypt. 
4.dylib@ -> libmcrypt.4.4.8.dylib
lrwxr-xr-x   1 root  wheel     21B Sep 19 16:53 /usr/lib/ 
libmcrypt.dylib@ -> libmcrypt.4.4.8.dylib
-rwxr-xr-x   1 root  wheel    801B Sep 19 16:53 /usr/lib/libmcrypt.la*

But this is the output from setting up python-mcrypt

# python setup.py build
running build
running build_ext
building 'mcrypt' extension
creating build
creating build/temp.macosx-10.3-fat-2.5
gcc -arch ppc -arch i386 -isysroot /Developer/SDKs/MacOSX10.4u.sdk - 
fno-strict-aliasing -Wno-long-double -no-cpp-precomp -mno-fused-madd - 
fno-common -dynamic -DNDEBUG -g -O3 -DVERSION="1.1" -I/usr/include -I/ 
Library/Frameworks/Python.framework/Versions/2.5/include/python2.5 -c  
mcrypt.c -o build/temp.macosx-10.3-fat-2.5/mcrypt.o
creating build/lib.macosx-10.3-fat-2.5
gcc -arch i386 -arch ppc -isysroot /Developer/SDKs/MacOSX10.4u.sdk -g  
-bundle -undefined dynamic_lookup build/temp.macosx-10.3-fat-2.5/ 
mcrypt.o -lmcrypt -o build/lib.macosx-10.3-fat-2.5/mcrypt.so
/usr/bin/ld: for architecture ppc
/usr/bin/ld: can't locate file for: -lmcrypt
collect2: ld returned 1 exit status
/usr/bin/ld: for architecture i386
/usr/bin/ld: can't locate file for: -lmcrypt
collect2: ld returned 1 exit status
lipo: can't open input file: /var/tmp//ccGRKjU2.out (No such file or  
directory)
error: command 'gcc' failed with exit status 1


What am I missing here? I linked PHP with the same libmcrypt library  
just fine. This is only happening for this extension only.

Would appreciate any help, thx

Ahmad Baitalmal


From steve at REMOVE-THIS-cybersource.com.au  Wed Sep 19 21:46:15 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Thu, 20 Sep 2007 01:46:15 -0000
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<dea92f560709021735l2c72d53ew94410fcb33b9b50b@mail.gmail.com>
	<mailman.303.1188779927.28954.python-list@python.org>
	<1190164166.378500.155990@o80g2000hse.googlegroups.com>
	<1190241711.344058.238380@57g2000hsv.googlegroups.com>
	<1190242799.954176.279440@22g2000hsm.googlegroups.com>
Message-ID: <13f3k77d7fljbb4@corp.supernews.com>

On Wed, 19 Sep 2007 15:59:59 -0700, TheFlyingDutchman wrote:

> Paul it's a pleasure to see that you are not entirely against
> complaints.

I'm not against complaints either, so long as they are well-thought out. 
I've made a few of my own over the years, some of which may have been 
less well-thought out than others.


> The very fastest Intel processor of the last 1990's that I found came
> out in October 1999 and had a speed around 783Mhz. Current fastest
> processors are something like 3.74 Ghz, with larger caches. Memory is
> also faster and larger. It appears that someone running a non-GIL
> implementation of CPython today would have significantly faster
> performance than a GIL CPython implementation of the late 1990's.

That's an irrelevant comparison. It's a STUPID comparison. The two 
alternatives aren't "non-GIL CPython on 2007 hardware" versus "GIL 
CPython on 1999 hardware" because we aren't using GIL CPython on 1999 
hardware, we're using it on 2007 hardware. *That's* the alternative to 
the non-GIL CPython that you need to compare against.

Why turn your back on eight years of faster hardware? What's the point of 
getting rid of the GIL unless it leads to faster code? "Get the speed and 
performance of 1999 today!" doesn't seem much of a selling point in 2007.


> Correct me if I am wrong, but it seems that saying non-GIL CPython is
> too slow, while once valid, has become invalid due to the increase in
> computing power that has taken place.

You're wrong, because the finishing line has shifted -- performance we 
were satisfied with in 1998 would be considered unbearable to work with 
in 2007.

I remember in 1996 (give or take a year) being pleased that my new 
computer allowed my Pascal compiler to compile a basic, bare-bones GUI 
text editor in a mere two or four hours, because it used to take up to 
half a day on my older computer. Now, I expect to compile a basic text 
editor in minutes, not hours.

According to http://linuxreviews.org/gentoo/compiletimes/

the whole of Openoffice-ximian takes around six hours to compile. Given 
the speed of my 1996 computer, it would probably take six YEARS to 
compile something of Openoffice's complexity.


As a purely academic exercise, we might concede that the non-GIL version 
of CPython 1.5 running on a modern, dual-core CPU with lots of RAM will 
be faster than CPython 2.5 running on an eight-year old CPU with minimal 
RAM. But so what? That's of zero practical interest for anyone running 
CPython 2.5 on a modern PC.

If you are running a 1999 PC, your best bet is to stick with the standard 
CPython 1.5 including the GIL, because it is faster than the non-GIL 
version.

If you are running a 2007 PC, your best bet is *still* to stick with the 
standard CPython (version 2.5 now, not 1.5), because it will still be 
faster than the non-GIL version (unless you have four or more processors, 
and maybe not even then).

Otherwise, there's always Jython or IronPython.



-- 
Steven.


From fdu.xiaojf at gmail.com  Sat Sep 29 06:04:06 2007
From: fdu.xiaojf at gmail.com (fdu.xiaojf at gmail.com)
Date: Sat, 29 Sep 2007 18:04:06 +0800
Subject: question about for cycle
Message-ID: <46FE2316.2040502@gmail.com>

Hi all,

I have the following code:

for i in generator_a:  # the first "for" cycle
     for j in generator_b:
         if something_happen:
             # do something here ..., I want the outer cycle to break
             break

What should I do if I want the outer "for" cycle to continue or break ? If I 
put a "continue" or "break" in the inner cycle, it has no effect on the outer 
cycle.

And I have another question. Which is the most efficient way to check if there 
are duplicate items in a list ? The items in the list may cannot be hashed, so 
set() may not work on the list.

Regards,


From super.sgt.pepper at gmail.com  Fri Sep 21 20:08:40 2007
From: super.sgt.pepper at gmail.com (Cristian)
Date: Sat, 22 Sep 2007 00:08:40 -0000
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <mailman.904.1190418441.2658.python-list@python.org>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<mailman.900.1190414696.2658.python-list@python.org>
	<1190415741.380795.259050@y42g2000hsy.googlegroups.com>
	<mailman.904.1190418441.2658.python-list@python.org>
Message-ID: <1190419720.811685.145880@r29g2000hsg.googlegroups.com>

On Sep 21, 4:47 pm, "Sean Tierney" <seanttier... at gmail.com> wrote:
> Just tell him that "functions are like all  other variables and can
> therefore be passed by other functions or returned by other functions.
> "
>



I could """Just tell him that "functions are like all  other variables
and can
therefore be passed by other functions or returned by other functions.
" """ but wouldn't it be great if Python did this for me? It seems to
me that the ability for Python to explicitly state that functions-are-
like-other-variables is there so why not expose it?

> If your friend understands variables and functions and he can't make
> the "leap" (and assuming you're right, of course) then your friend
> doesn't understand variables and functions.

To say that you understand variables and functions is language
specific. You can't translate your knowledge of variables and
functions from Python to Java and vice-versa. They are treated
completely different. Perhaps you can translate your Python
understanding of functions and variables to Javascript but not to C.




From shriphanip at gmail.com  Tue Sep 25 02:05:15 2007
From: shriphanip at gmail.com (Shriphani)
Date: Tue, 25 Sep 2007 06:05:15 -0000
Subject: Making a small change to a large XML document
In-Reply-To: <pan.2007.09.24.22.38.37.790708@gmail.com>
References: <pan.2007.09.24.22.38.37.790708@gmail.com>
Message-ID: <1190700315.084594.281180@19g2000hsx.googlegroups.com>


Dan Stromberg wrote:
> Say I want to take an existing XML document, and change the value="9997"
> and value="9998" to two different numbers, without changing any of the
> rest of the document - not even changing comments or indentation, if
> avoidable.
>
> What's the best way of doing it in python?
>
>   <bean id="cs" class="c.d.q.s.C">
>     <property name="p" value="9997"/>
>     <property name="mP" value="9998"/>
>     <property name="g" value="cs"/>
>     <property name="e" value="t"/>
>   </bean>
>
> My .xml file is full of such beans.
>
> I've played around with minidom a little in the past, and I'm targetting
> python 2.5.1.
>
> Thanks!

Hello,
I hope this works:

#!/usr/bin/python

from BeautifulSoup import BeautifulStoneSoup
#If the XML you provided is in a file named 'problem'
xml_struc = open('problem','r')
soup = BeautifulStoneSoup(xml_struc)
list_of_tags = soup.findAll('property')
for tag in list_of_tags:
    if tag['value'] == "9998":
        tag['value'] = "9999" #or whatever number you like
soup_str = str(soup)
f = open('output', 'w')
f.write(soup_str)
f.close()
xml_struc.close()



From paul at boddie.org.uk  Mon Sep 17 17:01:59 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Mon, 17 Sep 2007 14:01:59 -0700
Subject: Extracting xml from html
In-Reply-To: <1190061079.025479.129070@w3g2000hsg.googlegroups.com>
References: <1190061079.025479.129070@w3g2000hsg.googlegroups.com>
Message-ID: <1190062919.998077.112810@19g2000hsx.googlegroups.com>

On 17 Sep, 22:31, kyoso... at gmail.com wrote:
>
> What's the best way to get at the XML? Do I need to somehow parse it
> using the HTMLParser and then parse that with minidom or what?

Probably easiest is to use an XML processing toolkit or library which
supports HTML parsing. Since the libxml2 library (written in C) makes
a fairly good job of HTML parsing, I would suggest either libxml2dom
(for a DOM-like API) or lxml (for an ElementTree-like API) as suitable
Python wrappers of libxml2. Of course, HTMLParser or SGMLParser should
work, but the programming style is a bit more convoluted unless you're
used to XML processing using a SAX-like API.

Paul

P.S. I'm biased towards libxml2dom, being the developer, but I use it
routinely and it generally does the job for me.



From wolf_tracks at invalid.com  Wed Sep 19 09:23:08 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Wed, 19 Sep 2007 06:23:08 -0700
Subject: Tutorial or Example (or Tutorial) of Using Canvas to Produce
	a Plot
In-Reply-To: <1190185249.235840.263260@50g2000hsm.googlegroups.com>
References: <phRHi.50851$Um6.35199@newssvr12.news.prodigy.net>
	<13evohih7rkd030@corp.supernews.com>
	<WPTHi.5906$FO2.4148@newssvr14.news.prodigy.net>
	<13f0b2qlvj5ige6@corp.supernews.com>
	<hnWHi.9038$z_5.1095@nlpi069.nbdc.sbc.com>
	<9ai0f39lejmjc2qbfcgo1t4h8b3e6ot9jd@4ax.com>
	<1190185249.235840.263260@50g2000hsm.googlegroups.com>
Message-ID: <Mn9Ii.9921$924.3247@newssvr23.news.prodigy.net>

I'm just trying to get some feel for how canvas works. I'm about to modify a 
program I use for meteor work. It uses canvas to display images, and I plan 
to draw on the image. For example, I plan to draw compass headings on a 
circle every 30 degrees. Just warming up to the task.

exhuma.twn wrote:
> On Sep 18, 11:58 pm, Richard Townsend <r... at nospam.com> wrote:
>> On Tue, 18 Sep 2007 13:18:36 -0700, "W. Watson"
>>
>> <wolf_tra... at invalid.com> wrote:
>>> Tk is it. I'm really not interested in the others at this point.
>> John Grayson's book 'Python and Tkinter Programming' has a chapter on
>> plotting Graphs and Charts. You can even download that chapter as a
>> PDF file:
>>
>> http://www.manning-source.com/books/grayson/grayson_ch11.pdf
>>
>> Seehttp://www.manning.com/grayson/for more info about the book.
> 
> Also, if the graph is really all you need, matplotlib might be a very
> interesting choice:
> http://matplotlib.sourceforge.net/
> 
> It's got some user-interface facilities as well. But I never used
> those so far.
> 

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From f.guerrieri at gmail.com  Wed Sep 19 05:23:31 2007
From: f.guerrieri at gmail.com (Francesco Guerrieri)
Date: Wed, 19 Sep 2007 11:23:31 +0200
Subject: How to know the starting point
In-Reply-To: <96489.19792.qm@web8706.mail.in.yahoo.com>
References: <96489.19792.qm@web8706.mail.in.yahoo.com>
Message-ID: <79b79e730709190223o167b4b8g46f12e5ae66a5661@mail.gmail.com>

On 9/19/07, Raj kumar <k_r_a_j_kumar at yahoo.co.in> wrote:
> Hi,
> I need help regarding the starting point in python project,
> As we can find main() function in java class to know the starting class in
> java,
> what is the starting point in python project?
> How to find the starting point.
> Thank you
>

There is no such thing, you can start where you like: try to write a
simple .py file defining some functions and classes and then using
them. Then launch the app by python your_file.py, and it will just
work.

You will often find a test like

if __name__ == '__main__':
   do_something()

__name__ is the variable which contains the name of the module. If the
module is being run as

python your_module.py,

the __name__ becomes '__main__' and the condition of the if statement
is satisfied.
This is a common method to define a starting point for a python application.
Keep in mind that many python modules are intended to be imported by
other modules and not to be used as standalone applications, but
rather as libraries. As such, they don't have a starting point, and
the
if __name__ == '__main__':

test could be used for instance to start a test suite.


francesco


From gagsl-py2 at yahoo.com.ar  Thu Sep 13 00:54:26 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 13 Sep 2007 01:54:26 -0300
Subject: unexpected behavior: did i create a pointer?
References: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>
	<1189416604.902880.24370@g4g2000hsf.googlegroups.com>
	<46e7cdc6$0$12298$426a74cc@news.free.fr>
Message-ID: <op.tyks80scx6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 12 Sep 2007 08:30:14 -0300, Bruno Desthuilliers  
<bruno.42.desthuilliers at wtf.websiteburo.oops.com> escribi?:

> neoedmund a ?crit :
>> On Sep 7, 4:07 pm, gu <pistacc... at gmail.com> wrote:
> (snip pb and code)
>>> now, in the second "for" cycle and in functionA() i only 'touch'  
>>> copyOfA
>>> (altering it). as i don't touch the variable "a", i expect it not to be
>>> affected by any change, but copyOfA acts like a pointer to a and
>>> altering copyOfA's values result in altering the values of "a", so the
>>> result that i expect is:
> (snip)
>> no language act like want you tought, or the assignment operation will
>> be too expensive.
>
> IIRC, php4 was doing copies for arrays...

Pascal does copy arrays and structs (records) too.

-- 
Gabriel Genellina



From perl4hire at softouch.on.ca  Thu Sep 13 10:54:29 2007
From: perl4hire at softouch.on.ca (Amer Neely)
Date: Thu, 13 Sep 2007 10:54:29 -0400
Subject: Coming from Perl
In-Reply-To: <mailman.485.1189691416.2658.python-list@python.org>
References: <Cv%Fi.198$372.59@read2.cgocable.net>	<1189644803.816375.269950@y42g2000hsy.googlegroups.com>	<b46Gi.221$372.100@read2.cgocable.net>	<87y7fa52ru.fsf@benfinney.id.au>	<jWaGi.224$372.55@read2.cgocable.net>
	<mailman.485.1189691416.2658.python-list@python.org>
Message-ID: <d9cGi.356$372.131@read2.cgocable.net>

Richie Hindle wrote:
> [Amer]
>> Can you or anyone see anything in the posted code that might be the 
>> cause?
> 
>> #!/usr/bin/python
>> import cgitb; cgitb.enable(display=0, logdir=".")
>> import sys
>> sys.stderr = sys.stdout
>> print "Content-Type: text/html"
>> print
> 
> My guess would be that you don't have cgitb in your server environment, or
> that you have a bogus one.  Rearrange things like this:
> 
> #!/usr/bin/python
> print "Content-Type: text/html"
> print
> import sys
> sys.stderr = sys.stdout
> import cgitb; cgitb.enable(display=0, logdir=".")
> 

Nope. Same error. Is cgitb not in the standard distribution? Is it 
needed to print HTML?

On my home PC I changed the Apache error logging to 'debug' and got this 
nugget:
[Thu Sep 13 04:16:03 2007] [error] [client 0.0.0.0] (OS 2)The system 
cannot find the file specified.  : couldn't create child process: 
720002: hello.py

I suspect it would be similar on my hosting server. Is this saying it 
can't find hello.py or one of the modules?

-- 
Amer Neely
w: www.webmechanic.softouch.on.ca/
Perl | MySQL programming for all data entry forms.
"Others make web sites. We make web sites work!"


From as at hut.at  Wed Sep 12 11:26:37 2007
From: as at hut.at (hyena)
Date: Wed, 12 Sep 2007 17:26:37 +0200
Subject: is it possible to use different font within one wxpython static text
	widget?
Message-ID: <cbb24$46e8052d$839b8704$27403@news2.tudelft.nl>

problem is as title, bear me if this too silly or too naive.

I use wx.statictext widget to show some information in GUI, there are some 
numbers in the text to be emphasized in bigger other color. For example, in 
sentence "the travel speed of this car is 40 km /hour", I would like "40" to 
be bigger and in red color. I know I can use several statictext to get this 
effect. But i am quite relucktant to do so since I am quite unfamiliar with 
manageing the layout of widgets.

Is there a convinient way to have this done? Thanks for any .input





From newsgroups at debain.org  Mon Sep 10 16:04:04 2007
From: newsgroups at debain.org (Samuel)
Date: Mon, 10 Sep 2007 20:04:04 +0000 (UTC)
Subject: ANNOUNCE: Exscript 0.9.8
Message-ID: <fc47vk$qkj$1@tamarack.fernuni-hagen.de>

Introduction
-------------
Exscript is a scripting language for automating Telnet or SSH sessions. 
It supports a wide range of features, such as parallelization, AAA 
authentication methods, TACACS, and a very simple template language. 
Python developers can easily extend Exscript templates using standard 
Python modules.

This release comes with many new features, and the documentation was also 
greatly improved. Please refer to the project page for documentation.

Release 0.9.8 is now feature complete and expected to be the last release 
before 1.0 stable.

New since Exscript 0.9
-----------------------
* Full support for SSH was added.
* Greatly improved the prompt detection. This should now work by default 
with Unix, IOS, JunOS and many more.
* Support for assigning variables in the Exscript template.
* URL-style hostnames are now supported.
* The exscript interpreter now checks regular expressions for correctness 
at compiled time, not only at runtime.
* The "loop" statement now supports iterating over multiple lists in one 
run.
* A deadlock when using TACACS authentication was fixed.
* Character noise from telnet control characters is now properly filtered.
* Exscript no longer deadlocks if an error occurs while writing to a 
logfile.
* Performance was improved when many hosts are loaded from a text file.

Dependencies
-------------
Python 2.2 or better
Python Crypto module
Python pexpect module
For SSH support, the "ssh" command line utility (OpenSSH).

Download Exscript
------------------
Release: http://exscript.googlecode.com/files/exscript-0.9.8.tgz
SVN instructions: http://code.google.com/p/exscript/source

Links
------
Exscript project page: http://code.google.com/p/exscript/
Mailing list: http://groups.google.com/group/exscript
Bug tracker: http://code.google.com/p/exscript/issues/list
Browse the source: http://exscript.googlecode.com/svn/trunk/


From george.sakkis at gmail.com  Fri Sep 28 16:08:45 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 28 Sep 2007 20:08:45 -0000
Subject: Python 3.0 migration plans?
In-Reply-To: <ns9Li.1172$4V6.1092@newssvr14.news.prodigy.net>
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>
	<%q0Li.725$ih1.539@nlpi068.nbdc.sbc.com>
	<1i555ag.9ez4uvf4583jN%aleax@mac.com>
	<ns9Li.1172$4V6.1092@newssvr14.news.prodigy.net>
Message-ID: <1191010125.107578.67700@g4g2000hsf.googlegroups.com>

On Sep 28, 11:53 am, John Nagle <na... at animats.com> wrote:

> Alex Martelli wrote:
> > John Nagle <na... at animats.com> wrote:
>
> >> TheFlyingDutchman wrote:
> >>> It seems that Python 3 is more significant for what it removes than
> >>> what it adds.
>
> >>> What are the additions that people find the most compelling?
> >>     I'd rather see Python 2.5 finished, so it just works.
>
> > And I'd rather see peace on Earth and goodwill among men than _either_
> > Python 3 or your cherished "finished" 2.5 -- the comparison and implied
> > tradeoff make about as much sense as yours.
>
>      Insofar as Python has an organization, it's not adequately managing
> extension modules.  Each extension module has its own infrastructure,
> with its own build procedures, its own bug list, and its own maintainers.
> There's not even an archive.  Unlike CPAN, Cheese Shop is just a directory of
> URLs.
>
>      Take a look at how Perl does it.  Here are the instructions on
> how to contribute to CPAN:
>
>        http://www.cpan.org/modules/04pause.html
>
> There's a way to get your module into the system, a standardized format,
> build, and installation procedure, and an archive which is mirrored.
> There's a common bug reporting system.  Modules abandoned by their
> original developers are not lost, and can be "adopted" by someone else.
>
>      Python doesn't have any of this.  And that's far more of a problem
> than Python 3.x.

Does Perl support extension modules, and if so, are they so prevalent
as in Python ? Either case, bringing up CPAN is moot in this case;
nothing can force an external open source contributor to maintain or
provide binaries for his packages. How is this a problem of the
*language* ?

George



From paddy3118 at googlemail.com  Fri Sep  7 03:06:51 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Fri, 07 Sep 2007 07:06:51 -0000
Subject: Python and CUDO
In-Reply-To: <mailman.186.1189113183.2658.python-list@python.org>
References: <46E05DC0.7090102@glocalnet.net>
	<mailman.186.1189113183.2658.python-list@python.org>
Message-ID: <1189148811.336283.72920@50g2000hsm.googlegroups.com>

On Sep 6, 10:12 pm, Robert Kern <robert.k... at gmail.com> wrote:
> Veronika Lindstrand Kant wrote:
> > Hi!
> > I just wonder if there are any plans for building any support using
> > NIVIDAS CUDO plattform into python?
>
> Not into Python itself, but we are working on interfacing with NVIDIA's CUDA,
> yes (presuming you actually meant "NVIDIA's CUDA" rather than "NIVIDAS CUDO").
>
> http://code.google.com/p/pystream/
>
> --
> Robert Kern
>
> "I have come to believe that the whole world is an enigma, a harmless enigma
>  that is made terrible by our own mad attempt to interpret it as though it had
>  an underlying truth."
>   -- Umberto Eco

Maybe you and the CorePy guys at http://www.corepy.org/ could swap
notes and give us a similar way to work with these accellerators?

- Paddy.



From jfine at pytex.org  Tue Sep 18 16:06:39 2007
From: jfine at pytex.org (Jonathan Fine)
Date: Tue, 18 Sep 2007 21:06:39 +0100
Subject: can Python be useful as functional? (off topic)
References: <1190073045.618869.261290@k79g2000hse.googlegroups.com>
	<mailman.727.1190133380.2658.python-list@python.org>
Message-ID: <46F02FCF.7080209@pytex.org>

Steve Holden wrote:

> You remind me of the conversation between the philosopher and an 
> attractive lady whom he was seated next to at dinner. He asked her if 
> she would sleep with him for a million dollars, to which she readily 
> agreed. So he followed this by asking her if she'd sleep with him for a 
> dollar. She replied: "No. Do you take me for a prostitutte?", to which 
> his riposte was "We have already established that fact, and are now 
> merely haggling about the price".

I've seen this before, and it is witty.

However, it is perhaps unfair towards the woman.  The man, after all, is 
someone who has offered a woman money in return for sex.

The whole story reads differently if we replace 'philosopher' by 'man' 
and 'attractive lady' by 'woman'.

-- 
Jonathan






From yosuke at ccwf.cc.utexas.edu  Mon Sep  3 22:31:56 2007
From: yosuke at ccwf.cc.utexas.edu (yosuke at ccwf.cc.utexas.edu)
Date: Tue, 4 Sep 2007 02:31:56 +0000 (UTC)
Subject: trap setting attribute when the attribute is dict
References: <fbhi38$3rg$1@geraldo.cc.utexas.edu>
	<1188845236.417709.307160@50g2000hsm.googlegroups.com>
	<fbhodb$5uv$1@geraldo.cc.utexas.edu>
	<1188855177.466618.53640@22g2000hsm.googlegroups.com>
Message-ID: <fbig2s$dn4$1@geraldo.cc.utexas.edu>

Arnaud Delobelle <arnodel at googlemail.com> wrote:
> On Sep 3, 8:47 pm, <yos... at ccwf.cc.utexas.edu> wrote:

> [...]

>> My intention was to have a propery 'sum' in my object, and which has sum
>> of all the values() of the dict (i have code to make sure that the value
>> of dict are all numeric).  I could just the propery being calculated
>> everytime the property got __getattr__.  But I thought that it was
>> inefficient to calculate the same number over and over when the value is
>> already known.  So I was thiking of calculating the number only when the
>> dict got modified.
>>
>> I also experimented with the idea of subclassing dict itself to
>> calculate the sum.  Is this what would be better solution?

> Why not simply have a method to update the dictionary that also keeps
> the sum up to date? Something like that:

>>>> class MyObj(object):
> ...     def __init__(self):
> ...         self._d = {}
> ...         self._sum = 0
> ...     def set_key(self, key, val):
> ...         self._sum += val - self._d.get(key, 0)
> ...         self._d[key] = val
> ...     def get_key(self, key):
> ...         return self._d[key]
> ...     def sum(self):
> ...         return self._sum
> ...
>>>> a = MyObj()
>>>> a.set_key(1, 2)
>>>> a.sum()
> 2
>>>> a.set_key('a', 10)
>>>> a.set_key(1, 5)
>>>> a.sum()
> 15
>>>>

> Of course this is only worth it if you need to use the sum often
> enough.
> If you update the dictionary a lot but only need the sum from time to
> time, then it might not be worth it at all.

> Of course you could subclass dict:

> class MyDict(dict):
>     def __init__(self, *args, **kwargs):
>             self._sum = sum(self.itervalues())
>     def __setitem__(self, key, val):
>             self._sum += val - self.get(key, 0)
>             dict.__setitem__(self, key, val)
>     def sum(self):
>             return self._sum
>     # overload all other methods that mutate the dict
>     # to keep _sum up to date

>>>> d = MyDict()
>>>> d.sum()
> 0
>>>> d['a']=5
>>>> d.sum()
> 5
>>>> d['b']=10
>>>> d['a']=8
>>>> d.sum()
> 18
>>>>

Thank you.  I will go with subclassing method.

-- 
yosuke kimura
Center for Energy and Environmental Resources
The Univ. of Texas at Austin, USA


From pyth0nc0d3r at gmail.com  Tue Sep 18 19:33:51 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Tue, 18 Sep 2007 18:33:51 -0500
Subject: Regular Expressions
Message-ID: <eb79828c0709181633s1aa77323l8477e55d78b73b67@mail.gmail.com>

I'm trying to get the Javascript output on when I match the given value in a
var, I want to output that value that I tried to match:

Example JS:
x = '';//some INNERHTML in a document
if(x.innerHTML.match(/(.*)/i))
{
    valuefound = RegEx.$1;
}

I've been reading my python book and tutorials and google search and google
code search trying to understand and I'm still not quite understanding how
to do it.

-Lamonte.
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From pavlovevidence at gmail.com  Sat Sep 15 00:54:09 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sat, 15 Sep 2007 00:54:09 -0400
Subject: How to avoid overflow errors
References: <13em8vnr527rq20@corp.supernews.com>
	<mailman.560.1189817022.2658.python-list@python.org>
	<7xmyvoag7j.fsf@ruckus.brouhaha.com>
	<mailman.562.1189821558.2658.python-list@python.org>
Message-ID: <46eb6ad1$0$7493$4c368faf@roadrunner.com>

On Fri, 14 Sep 2007 22:59:13 -0300, Eduardo O. Padoan wrote:

> On 14 Sep 2007 18:08:00 -0700, Paul Rubin
> <"http://phr.cx"@nospam.invalid> wrote:
>> "Eduardo O. Padoan" <eduardo.padoan at gmail.com> writes:
>> > Not totally unrelated, but in Py3k, as it seems, overflows are really
>> > things of the past:
>> >
>> >
>> > Python 3.0a1 (py3k:58061, Sep  9 2007, 13:18:37) [GCC 4.1.3 20070831
>> > (prerelease) (Ubuntu 4.1.2-16ubuntu1)] on linux2 Type "help",
>> > "copyright", "credits" or "license" for more information.
>> > >>> class MyInt(int):
>> > ...     pass
>> > ...
>> > >>> import sys
>> > >>> MyInt(sys.maxint)
>> > 2147483647
>> > >>> MyInt(sys.maxint+1)
>> > 2147483648
>>
>> I'd be interested in knowing what happens in 3.0a1 with
>>
>>   a = itertools.count(sys.maxint)
>>   print a.next()
>>   print a.next()
> 
> 
>>>> print(next(a))
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> OverflowError: cannot count beyond PY_SSIZE_T_MAX
> 
> Hum, you've got me there. it is the same as in 2.x. Maybe the message
> should be less crypt, at least - nothing that googling for
> PY_SSIZE_T_MAX cant help.

This should demonstrate that OverflowError will not disappear entirely 
even in Python 3.

Even if we were to get rid of all OverflowErrors resulting from integer 
operations in Python, there are going to be some C extensions--including 
some in the Python standard library--that will store 32-bit integers.  
Modules such as array and struct will still raise it, and probably other 
modules were a long integer sometimes doesn't make sense (socket, for 
instance).  itertools.count() should work for arbitrary integers, though.


Carl Banks


From news at sandipan.com  Tue Sep  4 21:11:50 2007
From: news at sandipan.com (Sandipan News)
Date: Tue, 4 Sep 2007 21:11:50 -0400
Subject: Setting Current Dir in Python
In-Reply-To: <op.tx49m3vxx6zn5v@gabriel2.softlabbsas.com.ar>
References: <000001c7eeec$d9341470$8b9c3d50$@net>
	<op.tx49m3vxx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <012401c7ef59$bf8c9de0$3ea5d9a0$@com>

Tim and Gabriel,

Thank you so much. I was able to find and remove the special character from the line below and another one after it.
The error has now gone away.

Thanks also for the chdir solution, though I did not need it this time. The fix above was exactly what it needed to work.

I have my utilities chugging along again - What a relief!

Thanks again.

Sandipan

-----Original Message-----
From: python-list-bounces+news=sandipan.com at python.org [mailto:python-list-bounces+news=sandipan.com at python.org] On Behalf Of Gabriel Genellina
Sent: Tuesday, September 04, 2007 3:27 PM
To: python-list at python.org
Subject: Re: Setting Current Dir in Python

En Tue, 04 Sep 2007 09:12:22 -0300, Sandipan Gangopadhyay  
<sandipan at earthlink.net> escribi?:

> I have recently installed Python 2.5.1 and Pythonwin (without any  
> errors) on
> Windows Vista Ultimate.
>
> Now, the programs run fine within Pythonwin IDE when current directory is
> set to the program's directory.
>
> But, when I double click them from Windows Explorer, the program is not  
> run.

First, fix your source code (either removing the non-ascii character or  
adding an encoding line at the top, see  
<http://www.python.org/peps/pep-0263.html>) (PEP0263 is enforced from  
Python 2.5 and up; you got a warning on earlier versions).

os.getcwd() returns the current directory.
os.chdir() changes the current directory.
A shortcut on the desktop may use the desktop itself as the initial  
directory.
If you want to run your script from within the same directory as it  
resides, try this:
os.chdir(os.path.dirname(__file__))


-- 
Gabriel Genellina

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




From gagsl-py2 at yahoo.com.ar  Fri Sep 28 00:02:15 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 28 Sep 2007 01:02:15 -0300
Subject: Emailing the attachment created with the Quick Screenshots Script
	(Python + PIL)
References: <000001c8010b$81864eb0$eafca8c0@tfccorp.intra>
Message-ID: <op.tzcit1mgx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Thu, 27 Sep 2007 10:37:05 -0300, Mark Bratcher  
<mbratcher at cclpcitrus.com> escribi?:

> The Quick Screenshots Script (Python + PIL) is a "dream come true", and  
> yet
> so simple to use reliably.  Does anyone have a suggestion or know how to
> include in the script, the ability to email the attachment?  This would  
> make
> the dream perfect!  Thanks!

See the second example from the email package; it creates a MIME message  
with an attachment and sends it using SMTP.
<http://docs.python.org/lib/node162.html>

-- 
Gabriel Genellina



From ldo at geek-central.gen.new_zealand  Tue Sep 11 02:41:10 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Tue, 11 Sep 2007 18:41:10 +1200
Subject: urllib2: handle an error (302)
References: <mailman.365.1189486708.2658.python-list@python.org>
Message-ID: <fc5da6$95q$1@lust.ihug.co.nz>

In message <mailman.365.1189486708.2658.python-list at python.org>, Antoni
Villalonga wrote:

> There are any way to handle a 302 error?

I assume the answer you seek is here
<http://docs.python.org/lib/http-redirect-handler.html>.


From bdesth.quelquechose at free.quelquepart.fr  Fri Sep  7 12:28:28 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Fri, 07 Sep 2007 18:28:28 +0200
Subject: Organizing Code - Packages
In-Reply-To: <1189183088.922537.18290@r34g2000hsd.googlegroups.com>
References: <1189177596.960379.244990@w3g2000hsg.googlegroups.com>
	<46e17143$0$6189$426a74cc@news.free.fr>
	<1189183088.922537.18290@r34g2000hsd.googlegroups.com>
Message-ID: <46e41174$0$21562$426a74cc@news.free.fr>

xkenneth a ?crit :
>>Ah, yes, a couple of things:
>>- avoid the 'one-class-per-file' syndrom. It's perfectly ok to have tens
> 
> 
> Yes but i find it hard to edit classes easily when I have more than
> one class per file.

Why so ? Could it be that your classes are growing too fat ?


From pavlovevidence at gmail.com  Wed Sep 12 12:18:41 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Wed, 12 Sep 2007 09:18:41 -0700
Subject: An ordered dictionary for the Python library?
In-Reply-To: <13efnmi4n959a59@corp.supernews.com>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<13efnmi4n959a59@corp.supernews.com>
Message-ID: <1189613921.112030.243050@k79g2000hse.googlegroups.com>

On Sep 12, 8:42 am, Steven D'Aprano <st... at REMOVE-THIS-
cybersource.com.au> wrote:
> On Wed, 12 Sep 2007 07:33:45 +0000, Mark Summerfield wrote:
> > I feel that Python lacks one useful data structure: an ordered
> > dictionary.
>
> > I find such data structures v. useful in C++.
>
> [snip]
>
> Personally, I've never missed an ordered dict. What do people use them
> for?

I once had a GUI that displayed the contents of a dict as a tree.  The
user could add entries, and the entries would display at the end.
Hence, the ordered dict.

I could have kept the order separately, but what was the point?  I
just whipped up a homemade ordered dict class, it worked fine, and I
didn't have to worry about keeping them synchronized.


Carl Banks



From garyjefferson123 at yahoo.com  Fri Sep 21 00:20:59 2007
From: garyjefferson123 at yahoo.com (Gary Jefferson)
Date: Fri, 21 Sep 2007 04:20:59 -0000
Subject: distutils, extensions, and missing headers
In-Reply-To: <mailman.821.1190311704.2658.python-list@python.org>
References: <1190268535.052437.226240@v23g2000prn.googlegroups.com>
	<mailman.791.1190272989.2658.python-list@python.org>
	<1190297193.864613.13890@i13g2000prf.googlegroups.com>
	<mailman.821.1190311704.2658.python-list@python.org>
Message-ID: <1190348459.466864.179870@e34g2000pro.googlegroups.com>

On Sep 20, 12:08 pm, Robert Kern <robert.k... at gmail.com> wrote:
> Gary Jefferson wrote:
> > On Sep 20, 1:22 am, Robert Kern <robert.k... at gmail.com> wrote:
> >> Use the "headers" keyword to setup() to list theheaderfiles you want installed.
>
> >   I've tried "headers=['header1.h', 'header2.h']" in setup() as well
> > as in Extension(), and neither seem to get the files into the bdist or
> > bdist_rpm tarball.  Am I doing it wrong?  I can't seem to find any
> > examples that use this via google.
>
> You might need an accurate relative path. I'm assuming that you don't actually
> keep header1.h and header2.h in the top-level directory next to the setup.py.

I think I've got it, just needed to do a MANIFEST.in file as in
http://groups.google.com/group/comp.lang.python/browse_thread/thread/64ed59544c4c047e/e329ad06c50cff46?lnk=gst&q=distutils+header&rnum=1#e329ad06c50cff46
.  Apparently, the headers arg doesn't affect sdist or bdist.

With that, the headers get included in the tarballs, and bdist_rpm no
longer complains about them.  Unfortunately, it now complains about
missing .o files.  These .o's are built automatically via 'setup.py
build', but not via 'setup.py bdist_rpm', for reasons I can't fathom
at the moment.  But if I figure it out, I'll post here.

Gary



From pyth0nc0d3r at gmail.com  Fri Sep 14 16:12:44 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Fri, 14 Sep 2007 15:12:44 -0500
Subject: Just bought Python in a Nutshell
In-Reply-To: <1189784843.896396.108960@g4g2000hsf.googlegroups.com>
References: <eb79828c0709132112o5a3e7137n5ae5cd55e3e0b839@mail.gmail.com>
	<mailman.520.1189748935.2658.python-list@python.org>
	<1189784843.896396.108960@g4g2000hsf.googlegroups.com>
Message-ID: <eb79828c0709141312v588ef074w25c2200c37951098@mail.gmail.com>

Right, I like reading books it comes handier then reading ebooks,  less
programs and its right there in your hands.  Main reason I'm going to use it
for is to find questions without asking them on the python list or tutor
list for a quicker referrence.

On 9/14/07, DouhetSukd at gmail.com <DouhetSukd at gmail.com> wrote:
>
> I respectfully disagree with Shawn, in this case.
>
> Don't skim Nutshell, unless you know very little Python, and even then
> it is really the wrong book.  It is rather dry reading and provides
> very little of the usual user-friendly introductions to language
> features by solving simple problems.
>
> Doesn't sound like that much of an endorsement, does it?  Well, in
> fact, it is pretty much my most used Python book (out of 7 or 8
> others).
>
> If you read Alex's posts in this newsgroup, you'll see that he is one
> of the most pragmatic and rigorous posters who usually contributes
> code that elegantly and simply solves the issue at hand with the
> minimum amount of clutter.
>
> What Python in a Nutshell is really good at is showing you exactly
> what Python is capable of doing, feature by feature, in a thoroughly
> Pythonic way for the feature.  With code and exact implication.  For
> example, I know Python well but I am kinda lacking in metaclass
> comprehension.  If I were to write some non-trivial metaclasses I
> would surely have his 3 or 4 pages open on my desk as I write code and
> skim through other internet postings.  Those 3-4 pages have kinda made
> my brain shrivel every time I've looked at them, but they are the
> clearest overview I've seen of what is probably one of the hardest
> Python features to understand.
>
> For normal, easy-to-understand Python, Nutshell really dissects the
> languages with new insight.  The information is dense, because each
> word has its place and there very little filler.  That's why skimming
> it does not work for me, I just don't have the requisite sustained
> attention span.
>
> So, although I read almost all other computer books like Shawn does, I
> don't think it applies in this particular case.  When you have a
> particular aspect of Python in mind, use Nutshell.  Read up on 'look
> before you leap' in it if you really want a sample of how it is
> written.
>
> Cheers
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From ldo at geek-central.gen.new_zealand  Sat Sep  1 03:19:16 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 01 Sep 2007 19:19:16 +1200
Subject: Automation and scheduling of FrontPage publishing using Python
References: <1188517723.279932.299400@x40g2000prg.googlegroups.com>	<fbamnh$r7q$7@lust.ihug.co.nz>	<mailman.250.1188620292.28954.python-list@python.org>
	<fbb1lr$evf$5@lust.ihug.co.nz>
	<mailman.255.1188630271.28954.python-list@python.org>
Message-ID: <fbb3kv$jk5$1@lust.ihug.co.nz>

In message <mailman.255.1188630271.28954.python-list at python.org>, Steve
Holden wrote:

> Lawrence D'Oliveiro wrote:
>
>> If they were using FrontPage extensions, they deserve everything they
>> get.
> 
> While possibly justifiable, given that FrontPage has had holes you could
> drive a London double-decker but through since time immemorial, it isn't
> a terribly helpful observation.

Just to remove any possible doubt: FrontPage must die.

But if you want that expressed in less confrontational, more
customer-friendly words, how about this:

They need to engage the services of an expensive consultant or two, who will
bill them lots of hours working out an approach which may involve migrating
to a technology with better long-term prospects, or simply stitching
together a Frankenhack or two to eke a bit more life out of their existing
system, until it finally collapses altogether.

Either way, they need to spend the folding stuff, and lots of it. Asking for
help on a forum where people are more liable to throw brainpower rather
than money at problems, is a waste of time.


From piyushj at cse.iitk.ac.in  Thu Sep 27 12:52:39 2007
From: piyushj at cse.iitk.ac.in (Piyush Jain)
Date: Thu, 27 Sep 2007 22:22:39 +0530
Subject: making run time changes..
In-Reply-To: <fdgiju$516$2@sea.gmane.org>
References: <000001c80107$4f9ff120$eedfd360$@iitk.ac.in>
	<fdgiju$516$2@sea.gmane.org>
Message-ID: <002f01c80126$d08aee10$71a0ca30$@iitk.ac.in>

Hi,
It seems that pyro provides remote access to object acting as middleware. My
requirement is a bit different. It need not be remote. But I need to make
run time changes at the running program, say changing it's functionality.
More in lines of dynamic modules, but triggered by messages from outside.

Regards,
Piyush

-----Original Message-----
From: python-list-bounces+piyushj=cse.iitk.ac.in at python.org
[mailto:python-list-bounces+piyushj=cse.iitk.ac.in at python.org] On Behalf Of
Steve Holden
Sent: Thursday, September 27, 2007 9:05 PM
To: python-list at python.org
Subject: Re: making run time changes..

Piyush Jain wrote:
> Hi,
> 
> I am new(almost) to python. I wish to making a server in which I can 
> make changes at run time. For example , add a method to a 
> class/attribute to object etc. by sending it messages.
> 
> Can anyone help me with what features to look into and how to go about 
> it. Are there any similar projects?
> 
Take a look at Pyro (Python remote objects). It can almost certainly do 
what you want.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline

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



From egbert.bouwman at hccnet.nl  Fri Sep 28 05:46:58 2007
From: egbert.bouwman at hccnet.nl (egbert)
Date: Fri, 28 Sep 2007 11:46:58 +0200
Subject: Python 3.0 migration plans?
In-Reply-To: <fdhknb$has$1@sea.gmane.org>
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<fdhja4$qdk$1@daisy.noc.ucla.edu> <fdhknb$has$1@sea.gmane.org>
Message-ID: <20070928094658.GB3589@hccnet.nl>

On Thu, Sep 27, 2007 at 09:17:30PM -0400, Steve Holden wrote:
> So what we need is a poll on what the questions should be. I *love* c.l.py.
I will switch as soon as Debian has all the tools for an easy conversion
available, and Python 3000 has reached the default release status.
e
-- 
Egbert Bouwman - Keizersgracht 197 II - 1016 DS  Amsterdam - 020 6257991
========================================================================


From joel.hedlund at gmail.com  Tue Sep 25 18:12:33 2007
From: joel.hedlund at gmail.com (Joel Hedlund)
Date: Wed, 26 Sep 2007 00:12:33 +0200
Subject: What is a good way of having several versions of a python module
	installed in parallell?
In-Reply-To: <mailman.1054.1190736712.2658.python-list@python.org>
References: <fdai0b$7iv$1@news.lysator.liu.se>	<5ls95aF9pq3gU1@mid.uni-berlin.de>
	<mailman.1054.1190736712.2658.python-list@python.org>
Message-ID: <fdbou6$h5s$1@news.lysator.liu.se>

First of all, thanks for all the input - it's appreciated.

> Otherwise, three words:
> 
>   test driven development

Do you also do this for all the little stuff, the small hacks you just 
whip together to get a particular task done? My impression is that doing 
proper unittests adds a lot of time to development, and I'm thinking 
that this may be a low return investment for the small programs.

I try to aim for reusability and generalizability also in my smaller 
hacks mainly as a safeguard. My reasoning here is that if I mess up 
somehow, sooner or later I'll notice, and then I have a chance of making 
realistic damage assessments. But even so, I must admit that I tend to 
do quite little testing for these small projects... Maybe I should be 
rethinking this?

Cheers!
/Joel


From russell.no.spam at gmail.com  Tue Sep 18 01:45:14 2007
From: russell.no.spam at gmail.com (Russell Wallace)
Date: Tue, 18 Sep 2007 06:45:14 +0100
Subject: The meaning of  a = b  in object oriented languages
In-Reply-To: <1190094057.976729.285120@n39g2000hsh.googlegroups.com>
References: <1190094057.976729.285120@n39g2000hsh.googlegroups.com>
Message-ID: <wDJHi.22149$j7.399596@news.indigo.ie>

Summercool wrote:
> so most or all object oriented language do assignment by reference?
> is there any object oriented language actually do assignment by
> value?  I kind of remember in C++, if you do
> 
> Animal a, b;
> 
> a = b will actually be assignment by value.
> while in Java, Python, and Ruby, there are all assignment by
> reference.  ("set by reference")
> 
> Is that the case: if a is an object, then b = a is only copying the
> reference?

Yes, your understanding is exactly correct; C++ will assign by value 
unless you explicitly use pointers, but the other languages will assign 
by reference (except for primitive types).

-- 
"Always look on the bright side of life."
To reply by email, replace no.spam with my last name.


From nagle at animats.com  Thu Sep 20 16:12:29 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 20 Sep 2007 13:12:29 -0700
Subject: M2Crypto 0.18 - new version, same old build bugs.
Message-ID: <eiAIi.10067$924.3670@newssvr23.news.prodigy.net>

Back in March, I posted this:

>     Hit that with OpenSSL.  Red Hat took elliptical curve cryptography
> out of Fedora 6 for patent reasons.  With that missing, M2Crypto won't
> build.  It ought to; the implementor of M2Crypto thought of that, because
> it's an optional feature.  But M2Crypto uses SWIG.  SWIG doesn't normally
> process nested include files.  OpenSSL had changed their configuration
> approach to use nested include files.  So SWIG didn't see the #define that
> said to turn off elliptical curve crypto support.  This resulted in
> compile errors in the 24,000 lines of code that come out of SWIG. 

    That was for M2Crypto 0.17.

    It's still broken in M2Crypto 0.18.

    And there's no RPM or Windows binary.

    Nobody actually uses this stuff, do they?

					John Nagle


From Sebastien.Boisgerault at gmail.com  Fri Sep  7 13:02:04 2007
From: Sebastien.Boisgerault at gmail.com (S bastien Boisg rault)
Date: Fri, 07 Sep 2007 10:02:04 -0700
Subject: Speed of Python
In-Reply-To: <mailman.230.1189183406.2658.python-list@python.org>
References: <mailman.230.1189183406.2658.python-list@python.org>
Message-ID: <1189184524.709954.242230@o80g2000hse.googlegroups.com>


On Sep 7, 6:42 pm, "wang frank" <f... at hotmail.co.jp> wrote:

Matlab (aka MATrix LABoratory) has been designed with numeric
computations in mind (every object being natively a n-dim
array). If you wish to develop that kind of applications in
Python, consider using the numerical array structure provided
by Numpy. Numpy being mostly written in C, that should speed
up your application ... In this context, additional 3rd party
libs such as Scipy, Matplotlib, PIL, etc. will also be useful.

Cheers,

SB

> Hi,
>
> While comparing the speed of octave and matlab, I decided to do a similar
> test for python and matlab. The result shows that python is slower than
> matlab by a factor of 5. It is not bad since octave is about 30 time slower
> than matlab.
>
> Here is the result in matlab:
> Elapsed time is 0.015389 seconds.
>
> and in Python:>>> t=timeit.Timer("bench1.bench1(10)","import bench1")
> >>> t.repeat(1,1)
>
> [0.071012377266015392]
>
> Here is the bench1.py:
> import math
> def bench1(n):
>         for i in range(n):
>                 for j in range(1000):
>                         m=j+1
>                         z=math.log(m)
>                         z1=math.log(m+1)
>                         z2=math.log(m+2)
>                         z3=math.log(m+3)
>                         z4=math.log(m+4)
>                         z5=math.log(m+5)
>                         z6=math.log(m+6)
>                         z7=math.log(m+7)
>                         z8=math.log(m+8)
>                         z9=math.log(m+9)
>         return z9
>
> Is my conclusion correct that Python is slower than matlab? Are there any
> way to speed it up? It seems Python automatically created bench1.pyc. Does
> Python automatically execute the bench1.pyc to speed it up?
>
> Thanks
>
> Frank
>
> _________________________________________________________________
> ???????? ?????????????????????????http://chizumaga.jp/




From spam.noam at gmail.com  Mon Sep 17 19:39:36 2007
From: spam.noam at gmail.com (spam.noam at gmail.com)
Date: Mon, 17 Sep 2007 23:39:36 -0000
Subject: How can I know how much to read from a subprocess
In-Reply-To: <1190070896.332844.23080@22g2000hsm.googlegroups.com>
References: <1190070896.332844.23080@22g2000hsm.googlegroups.com>
Message-ID: <1190072376.600475.254260@y42g2000hsy.googlegroups.com>

Ok, I could have researched this before posting, but here's an
explanation how to do it with twisted:

http://unpythonic.blogspot.com/2007/08/spawning-subprocess-with-pygtk-using.html

It seems that another solution is gobject.io_add_watch, but I don't
see how it tells me how much I can read from the file - if I don't
know that, I won't know the argument to give to the read() method in
order to get all the data:

http://www.pygtk.org/docs/pygobject/gobject-functions.html#function-gobject--io-add-watch

Noam



From ratchetgrid at googlemail.com  Thu Sep 27 12:16:29 2007
From: ratchetgrid at googlemail.com (Nathan Harmston)
Date: Thu, 27 Sep 2007 17:16:29 +0100
Subject: Pb with an AttributeError
In-Reply-To: <676224240709270915x537a6426h1512cbddccb5c68f@mail.gmail.com>
References: <FFC5D92B345ADD428B11AA3943023F300417685E@BARDEAU.hmc.jet>
	<676224240709270915x537a6426h1512cbddccb5c68f@mail.gmail.com>
Message-ID: <676224240709270916w5a82ffd3ycf095bd5605a0915@mail.gmail.com>

Did I just help someone with their homework? Hope not :S

On 27/09/2007, Nathan Harmston <ratchetgrid at googlemail.com> wrote:
> Hi,
>
> I m not sure what your trying to do, but this is where your problem is:
>
> string1 is not a string it is actually a dict because of your eval.
> When you call
> string1["param"] inside the string.split()
>
> it is returning a dictionary and not a string....
> 'param': {'key': 'SP<136>=', 'value': ['SD:<0> ']}
>
> since {'key': 'SP<136>=', 'value': ['SD:<0> ']} is inside curly
> brackets it is a dictionary.
>
> I still dont get what your trying to have as your final result, but
> hope this helps.
>
> Thanks
>
> Nathan
>
> On 27/09/2007, Eric BOUVIER <ebouvier at jetmultimedia.fr> wrote:
> >
> >
> >
> > Hello,
> >
> > First, sorry for my english.
> >
> > I've just been assigned a project written in Python which contains bug(s).
> > I've never programmed in Python, but I've read the code
> > and understood basically what the different source codes do.
> >
> > I've traced the code and found where the problem is but I don't
> > know how to solve the problem.
> >
> > Here it is :
> >
> > I've got a string issued from a CSV file :
> >    string1 = eval(line[4])
> >    print " * string1 = (", string1 ,") \n"
> >         =>  * string1 = ( {'header': 'X-Score', 'param': {'key': 'SP<136>=',
> > 'value': ['SD:<0> ']} )
> >
> > Then, there is a split with the equal :
> >    TheParts = string.split(string1["param"], "=")
> >    print " * TheParts = (", TheParts ,") \n"
> >
> > But, running the program returns :
> >
> > Traceback (most recent call last):
> >   File "C:\test\helper.py", line 136, in Action_handler
> >     Score_eval(line, OutputFile_SP, This_Host)
> >   File "C:\test\helper.py", line 66, in Score_eval
> >     TheParts = string.split(string1["param"], "=")
> >   File "C:\ActiveState\Python25\lib\string.py", line 290,
> > in split
> >     return s.split(sep, maxsplit)
> > AttributeError: 'dict' object has no attribute 'split'  !?!
> >
> > I've found that it works when I put directly the string in the split
> > expression :
> >
> >    TheParts = string.split(" {'key': 'ESP<136>=', 'value': ['SHA:<0> ']} ",
> > "=")
> >       => * TheParts =   ["{'key': 'ESP<136>", "', 'value': ['SHA:<0> ']}"]
> >
> >   But the code isn't dynamic anymore !
> > I think it's a problem with the type, but the different syntax I've tried
> > didn't work.
> > Is somebody could help me ?
> >
> >  Thank you
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>


From nutsbreaker1 at gmail.com  Sat Sep 15 12:27:12 2007
From: nutsbreaker1 at gmail.com (nutsbreaker1 at gmail.com)
Date: Sat, 15 Sep 2007 16:27:12 -0000
Subject: Need a guitar?
Message-ID: <1189873632.248697.163620@19g2000hsx.googlegroups.com>

Free guitars here!!!!!!

http://freeguitars.blogspot.com/



From carsten at uniqsys.com  Mon Sep 10 09:58:25 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 10 Sep 2007 09:58:25 -0400
Subject: Using a time duration to print out data where every 2 seconds
	is a pixel
In-Reply-To: <slrnfeaips.m47.hat@se-162.se.wtb.tue.nl>
References: <1189427545.322679.260970@r29g2000hsg.googlegroups.com>
	<slrnfeaips.m47.hat@se-162.se.wtb.tue.nl>
Message-ID: <1189432705.3385.31.camel@dot.uniqsys.com>

On Mon, 2007-09-10 at 15:48 +0200, A.T.Hofkamp wrote:
>  I have seen references to a module called datetime, but I have never used such
>  module so no idea what it is or where to get it.

You get it by using a non-ancient version of Python. It's been part of
the standard library since Python 2.3.

-- 
Carsten Haese
http://informixdb.sourceforge.net




From willshak at 00hvc.rr.com  Fri Sep 28 08:18:11 2007
From: willshak at 00hvc.rr.com (willshak)
Date: Fri, 28 Sep 2007 08:18:11 -0400
Subject: Traveling Europe
In-Reply-To: <a7OdnYj7itv392HbnZ2dnUVZ_sDinZ2d@comcast.com>
References: <1190907679.164542.149190@19g2000hsx.googlegroups.com>
	<a7OdnYj7itv392HbnZ2dnUVZ_sDinZ2d@comcast.com>
Message-ID: <13fps837vh5cpf9@news.supernews.com>

on 9/27/2007 10:43 PM Eric Sosman said the following:
> freeaircon at gmail.com wrote:
>> World's most popular traveling destinations
>>
>> http://...
>
>     "Nobody goes there any more; it's too crowded." -- LPB
>
Besides, "It gets late there early" -- LPB

-- 

Bill
In Hamptonburgh, NY
To email, remove the double zeroes after @


From lasses_weil at klapptsowieso.net  Tue Sep 11 06:06:17 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Tue, 11 Sep 2007 12:06:17 +0200
Subject: Checking if elements are empty
In-Reply-To: <mailman.360.1189483878.2658.python-list@python.org>
References: <2323A6D37908A847A7C32F1E3662C80E010A0246@dc1ex01.air.org>	<fbme5d$qa$1@sea.gmane.org>	<mailman.93.1189003016.2658.python-list@python.org>	<fbqedh$31g$1@lust.ihug.co.nz>	<46e115e5$0$7691$9b4e6d93@newsspool2.arcor-online.net>	<fbsqqs$efc$2@lust.ihug.co.nz>	<46e2013a$0$7687$9b4e6d93@newsspool2.arcor-online.net>	<slrnfead5j.mo.horpner@FIAD06.norwich.edu>	<mailman.321.1189434264.2658.python-list@python.org>	<slrnfeaoed.b4.horpner@FIAD06.norwich.edu>	<mailman.329.1189439834.2658.python-list@python.org>	<slrnfeauhp.14c.horpner@FIAD06.norwich.edu>
	<mailman.360.1189483878.2658.python-list@python.org>
Message-ID: <46e66899$0$4534$9b4e6d93@newsspool3.arcor-online.net>

Steve Holden wrote:
> Neil Cerutti wrote:
>  >>> y = ""
>  >>> if y[0] == "":
> ...   print "True"
> ... else:
> ...   print "False"
> ...
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> IndexError: string index out of range
>  >>>
> 
Uhm, weren't we talking about a list of strings?

/W


From quentel.pierre at wanadoo.fr  Sun Sep 16 12:53:34 2007
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: Sun, 16 Sep 2007 09:53:34 -0700
Subject: Processing drag & drop on the desktop
Message-ID: <1189961614.510561.194610@w3g2000hsg.googlegroups.com>

Hi all,

I would like to create an application on a Windows machine, such that
when a document is dragged and dropped on the application icon on the
desktop, the document is processed by the application

For instance, if I drag & drop an Outlook message or a PPT
presentation, the application would propose to tag the document with
keywords taken from a database

Is it possible to do this with a Python script, and how ?

Regards,
Pierre



From http  Sun Sep 16 12:12:56 2007
From: http (Paul Rubin)
Date: 16 Sep 2007 09:12:56 -0700
Subject: Needless copying in iterations?
References: <fchk59$mm3$1@daisy.noc.ucla.edu>
	<5l3ab6F5v20uU3@mid.uni-berlin.de>
	<13eourdrne86e61@corp.supernews.com>
	<874phv42to.fsf@benfinney.id.au>
	<13epv3fnb6bak15@corp.supernews.com>
	<5l4ghuF655kfU2@mid.uni-berlin.de>
	<13eqc2daojgho03@corp.supernews.com>
Message-ID: <7xzlzmoagn.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> writes:
> > What do you mean by Haskell is a dynamic language?  It is statically and
> > strict typed and the compiler usually knows all the functions.  No
> > "surprises", no side effects, no duck typing.
> 
> Haskell's IO monad (and possibly the do monad?) allows side effects. It 
> would be a pretty poor programming language that didn't allow input or 
> output!

In a certain theoretical sense, input and output in the IO monad are
not side effects.  Side effects means you can somehow distinguish
between calling f(x) twice with the same value of x, and calling it
just once.  In Haskell, the print function does an output operation
(called an "action") but if I understand it right, it turns out you
cannot call the print function twice with the same argument.  Of
course you can say
   main = do { print "hello"; print "hello" }
and that prints "hello" twice, but the do statement is syntactic sugar
that turns the above into approximately like (the exact mechanism is
a bit hairier):
    x = (special token representing the state of the external world)
    y = print ("hello", x)  # y is the new external world state
    z = print ("hello", y)  # z is another new state
so print receives a different arg each time.  (Note that every Haskell
function has exactly one argument, so f(x,y) means call f, giving it
the tuple (x,y) as an argument).  

> See also http://homepages.cwi.nl/~ralf/OOHaskell/
> showing that Haskell can do object-oriented programming, complete with 
> mutable objects and side-effects. Although "duck typing" is listed as a 
> keyword, I couldn't see any reference to it in the paper.

That describes an OO extension to Haskell, which I suppose is
interesting, but it's not Haskell.  You could also bolt a Python
interpreter into Haskell and that would not be Haskell either.

> Haskell uses type inference, and has a "maybe" type for those cases where 
> it can't tell what the type will be.

Type inference just means the static type system doesn't rely on
declarations.  Like when you say 3+4 in C++ or Java, the compiler
figures out that is an integer expression, but if you say 
  x = 3 + 4
without an "int x" declaration, the compiler complains.  Haskell goes
a little further and lets you say
   x = 3 + 4
and the compiler says "ok, now I know that x is an integer".  If you
later try to concatenate x with a string:
   y = x ++ "hello"
you get a compile time error message.  In a dynamic language like
Python you would not get the error message til runtime.  That is the
difference between a static and dynamic language.
   
The Maybe monad is still a static type.  You can think of it as a
statically typed list with a maximum of one element, i.e. a Maybe Int
can have values like [3] (denoted "Just 3") or like [] (the empty
list, denoted Nothing).  It cannot have a value like "foo" or
[3.14159] or [[7]] or [2,3,4].  You get compile time error messages
if you try to assign those values to it.  Of course you can have a
Maybe Float (like [3.14159]) or a Maybe (Maybe Int) (like [[7]]).

> If you still don't accept that Haskell is a dynamic language, for 
> whatever definition of dynamic language you use, I'll withdraw the claim 
> for the sake of not getting bogged down in long arguments over something 
> that was really just a minor point.

Haskell is certainly not a dynamic language in the usual sense of that
term.


From bj_666 at gmx.net  Mon Sep 10 10:32:40 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 10 Sep 2007 14:32:40 GMT
Subject: How do I read and write to the same CSV file
References: <1189434466.001109.313060@d55g2000hsg.googlegroups.com>
Message-ID: <5kl2s8F3vfqqU9@mid.uni-berlin.de>

On Mon, 10 Sep 2007 07:27:46 -0700, Chris wrote:

> if date == 0:
>       date = os.getmtime()
>       # now this is where I want to write into the row of the same csv
> file but only updating that one field
> 
> How can I do this?

You can't.  Modifying text files with variable length lines is
"impossible" or at least not worth the trouble because if the replacement
line does not have the very same length, all lines after that changed line
have to be moved, i.e. rewritten anyway.

Write the rows to another file and modify the desired entry on the fly and
rename the temporary file to the source file's name afterward.

Ciao,
	Marc 'BlackJack' Rintsch


From larry.bates at websafe.com  Wed Sep 12 16:55:35 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Wed, 12 Sep 2007 15:55:35 -0500
Subject: I want py2exe not to create library.zip
In-Reply-To: <mailman.452.1189627963.2658.python-list@python.org>
References: <mailman.452.1189627963.2658.python-list@python.org>
Message-ID: <3P6dnfdlGPbez3XbnZ2dnUVZ_oaonZ2d@comcast.com>

Laszlo Nagy wrote:
> 
>  Hi,
> 
> I want py2exe not to create library.zip. My reason is that the installed 
> program will be a self updating program, and it must be able to download 
> changes (newer python source files) from the server. So the files should 
> not be in library.zip. I tried the --bundle option but apparently it can 
> only be used to make the distribution __more__ bundled.
> 
> Thanks,
> 
>   Laszlo
> 
That is correct.  People want less files to distribute not more.  People 
complain on py2exe list that it doesn't create a single .EXE file.  Don't
try to update the program via patching "pieces".  Wrap everything in a proper 
installer (I use and highly recommend Inno Setup).  It can handle version 
control, there is a plug-in for over-the-wire updates, etc.  Best way I know of 
to automate everything.

-Larry


From tjreedy at udel.edu  Sat Sep 22 16:23:42 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 22 Sep 2007 16:23:42 -0400
Subject: Getting rid of bitwise operators in Python 3?
References: <46f49740$0$32514$4c368faf@roadrunner.com>
Message-ID: <fd3tk6$7mr$1@sea.gmane.org>


"Carl Banks" <pavlovevidence at gmail.com> wrote in message 
news:46f49740$0$32514$4c368faf at roadrunner.com...
| | Is it worth it to make such a change?  It would remove a lot of 
operators
| (11 by my count), vastly simplifying syntax,  Which, IMHO, is no small
| thing.  New numerical types would have fewer operations to support.

Py3 adds an abstract base class module.  Bit-integers (with the above 
operations) are a separate subclass of abstract int/rats (forget the 
detail), so new numerical types do not have to support those ops unless 
declared as deriving from the bit-int class.

Some people consider having lots of operators available to overload in 
their classes to be a good thing.  Operator notation is much nicer that 
function notation for binary functions.mapping pairs of objects of a class 
to an object of the class.

tjr





From jstroud at mbi.ucla.edu  Thu Sep 13 18:30:50 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 13 Sep 2007 15:30:50 -0700
Subject: An ordered dictionary for the Python library?
In-Reply-To: <fcc5lt$ish$1@daisy.noc.ucla.edu>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<7xzlzrtrjn.fsf@ruckus.brouhaha.com>
	<1189664832.876539.86800@k79g2000hse.googlegroups.com>
	<fcc5lt$ish$1@daisy.noc.ucla.edu>
Message-ID: <fccdaa$olp$1@daisy.noc.ucla.edu>

James Stroud wrote:
>   set_value_at -> set_value  (not simply set)

Actually, 'set' seems better than set_value.


From steve at holdenweb.com  Thu Sep 27 18:17:26 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 27 Sep 2007 18:17:26 -0400
Subject: Importing Module To Use Variables In A Second Module
In-Reply-To: <slrnffo891.17r.rshepard@salmo.appl-ecosys.com>
References: <slrnffo891.17r.rshepard@salmo.appl-ecosys.com>
Message-ID: <fdha5m$orn$1@sea.gmane.org>

rshepard at nospam.appl-ecosys.com wrote:
>   I'm stymied by what should be a simple Python task: accessing the value of
> a variable assigned in one module from within a second module. I wonder if
> someone here can help clarify my thinking. I've re-read Chapter 16 (Module
> Basics) in Lutz and Ascher's "Learning Python" but it's not working for me.
> 
>   In one module (the "source"), variablePage.py, three wxPython widgets
> display values that are assigned to variables: curVar, UoDlow, and UoDhigh.
> I want to display then in equivalent widgets on a wxPython notebook tab in a
> different module, the "importer."
> 
>   At the top of the importer module I have:
> 
> from variablePage import curVar, UoDlow, UoDhigh
> 
> and I try to display the values of those variables in widgets on this page.
> But, python complains:
> 
>     from variablePage import curVar, UoDlow, UoDhigh
> ImportError: cannot import name curVar
> 
>   I've also tried
> 
> import variablePage as VP
> 
>   and referenced the variables as VP.curVar, VP.UoDlow, and VP.UoDhigh, but
> python still doesn't like this:
> 
>   File "/data1/eikos/fuzSetPage.py", line 364, in loadParVar
>     first = VP.curVar
> AttributeError: 'module' object has no attribute 'curVar'
> 
>   Both of these forms are used in the book (pages 260-261) in simple
> examples. I also get errors if I try importing using the class name before
> the variable name.
> 
>   A clue stick would be very helpful since I am not seeing just what I'm
> doing incorrectly.
> 
> Rich

Self-evidently you are *not* creating the variables you think you are in 
the variablePage module. Have you tried an interactive test? Try this at 
the interpreter prompt:

 >>> import variablePage
 >>> dir(variablePage)

and you will see exactly what names the module is defining in its 
namespace. You could also try

 >>> variablePage.__file__

to make sure that you are importing the module you think you are.

Otherwise, do you have circular imports? In other words, does the 
variablePage module by any chance import the module that's trying to 
import *it*? That's also a fruitful source of errors.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From hall.jeff at gmail.com  Sat Sep 29 11:47:24 2007
From: hall.jeff at gmail.com (hall.jeff at gmail.com)
Date: Sat, 29 Sep 2007 15:47:24 -0000
Subject: Program inefficiency?
In-Reply-To: <13fss68juscn33@corp.supernews.com>
References: <1191079347.192272.240540@22g2000hsm.googlegroups.com>
	<13fss68juscn33@corp.supernews.com>
Message-ID: <1191080844.248426.316340@g4g2000hsf.googlegroups.com>

I did try moveing the re.compile's up and out of the replacecylce()
but it didn't impact the time in any meaningful way (2 seconds
maybe)...

I'm not sure what an shell+sed script is... I'm fairly new to Python
and my only other coding experience is with VBA... This was my first
Python program

In case it helps... We started with only 6 loops of replacecycle() but
had to keep adding progressively more as we found more and more links
with lots of spaces in them... As we did that, the program's time grew
progressively longer but the length grew multiplicatively with the
added number of cycles... This is exactly what I would have expected
and it leads me to believe that the problem does not lie in the
replacecycle() def but in the masseditor() def... *shrug*



From jeff at taupro.com  Mon Sep  3 05:16:54 2007
From: jeff at taupro.com (Jeff Rush)
Date: Mon, 03 Sep 2007 04:16:54 -0500
Subject: The Texas Python Unconference is Almost Here!
Message-ID: <46DBD106.7090901@taupro.com>

The first regional Python unconference is coming to Houston on September 15-16
(Sat-Sun).  Being held at the Texas Learning & Computing Center on the
University of Houston main campus, this is a FREE event for Pythoneers from
all over the Texas region.

    http://pycamp.python.org/Texas/

And being an unconference, participation by those who attend is welcome and
greatly sought.  The topics to be presented are purely up to the attendees.

Details about the facility and a sign-up registration list is available on the
wiki.  Please add your name if you think you might attend, so that we can have
some estimate of who is coming.

Also add to the wiki topics on which you are coming prepared to present, or
that you would like to see.  Often people can present on many topics but don't
know what others are interested in.

And a big thanks go out to Robin Friedrich and those in Houston for hosting
us.  Let's roll up our sleeves and help them out!  Involvement is key to
making an unconference successful.

For those not familiar with unconferences, check out this description:

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

See you all there...

Jeff Rush
Python Advocacy Coordinator

P.S. Please repost this to other Texas Python organizations.


From andre.roberge at gmail.com  Fri Sep  7 15:15:04 2007
From: andre.roberge at gmail.com (=?iso-8859-1?B?QW5kcuk=?=)
Date: Fri, 07 Sep 2007 19:15:04 -0000
Subject: Is a Borg rebellion possible? (a metaclass question)
In-Reply-To: <mailman.245.1189191618.2658.python-list@python.org>
References: <1189168282.665210.260840@19g2000hsx.googlegroups.com>
	<mailman.220.1189171663.2658.python-list@python.org>
	<1189180478.257790.60160@g4g2000hsf.googlegroups.com>
	<mailman.245.1189191618.2658.python-list@python.org>
Message-ID: <1189192504.062833.140500@y42g2000hsy.googlegroups.com>

On Sep 7, 4:00 pm, Carsten Haese <cars... at uniqsys.com> wrote:
> On Fri, 2007-09-07 at 15:54 +0000, Andr? wrote:
> > Unfortunately, it fails.  Here's what I tried, followed by the
> > traceback
> > class SplinterBorg(object):
> >     _shared_states = {}
> >     def __new__(cls, *a, **k):
> >         group = k.pop("group","BORG")
> >         obj = object.__new__(cls, *a, **k)
> >         obj.__dict__ = cls._shared_states.setdefault(group,{})
> >         return obj
>
> > class MyClass(SplinterBorg):
> >    def __init__(self, name):
> >        self.name = name
> >[...]
> > Traceback (most recent call last):
> >   File "test.py", line 15, in <module>
> >     b1 = MyClass('b', group="B")
> > TypeError: __init__() got an unexpected keyword argument 'group'
>
> Indeed, if you have an __init__ method that shouldn't see the "group"
> argument, you need a metaclass after all so you can yank the "group"
> argument between __new__ and __init__. The following code seems to work,
> but it's making my brain hurt:
>
> class SplinterBorgMeta(type):
>     def __call__(cls, *args, **kwargs):
>         inst = cls.__new__(cls, *args, **kwargs)
>         kwargs.pop("group",None)
>         inst.__init__(*args,**kwargs)
>         return inst
>
> class SplinterBorg(object):
>     __metaclass__ = SplinterBorgMeta
>     _shared_states = {}
>     def __new__(cls, *a, **k):
>         group = k.pop("group","BORG")
>         obj = object.__new__(cls, *a, **k)
>         obj.__dict__ = cls._shared_states.setdefault(group,{})
>         return obj
>
> class MyClass(SplinterBorg):
>     def __init__(self, name):
>        self.name = name
>
> The alternatives, as Steve just pointed out, would be not to subclass
> SplinterBorg or to provide an __init__ method that expects a "group"
> argument.
>
> HTH,
>

Thanks for your reply.  I will try to adapt it and see if it works in
my case.

Andr?

> --
> Carsten Haesehttp://informixdb.sourceforge.net




From frikimaster at gmail.com  Tue Sep 11 08:01:37 2007
From: frikimaster at gmail.com (Antoni Villalonga)
Date: Tue, 11 Sep 2007 14:01:37 +0200
Subject: urllib2: handle an error (302)
In-Reply-To: <fc5da6$95q$1@lust.ihug.co.nz>
References: <mailman.365.1189486708.2658.python-list@python.org>
	<fc5da6$95q$1@lust.ihug.co.nz>
Message-ID: <75eeb70e0709110501x2bfd926cxc3048fa273ac3a01@mail.gmail.com>

2007/9/11, Lawrence D'Oliveiro:
> In message <mailman.365.1189486708.2658.python-list at python.org>, Antoni
> Villalonga wrote:
>
> > There are any way to handle a 302 error?
>
> I assume the answer you seek is here
> <http://docs.python.org/lib/http-redirect-handler.html>.
> --
> http://mail.python.org/mailman/listinfo/python-list
>

Yes I read it, but I don't stand how to use it. I'm looking for an
example of error handlers.

Thanks!

-- 
"Boring two-person multiplayer may turn friends into enemies."

Antoni Villalonga i Noceras
#Bloc# ~> http://friki.CAT
#Jabber# ~> friki at bulmalug.net


From jfine at pytex.org  Wed Sep 19 02:38:07 2007
From: jfine at pytex.org (Jonathan Fine)
Date: Wed, 19 Sep 2007 07:38:07 +0100
Subject: [ANN] Metatest 0.1.0
References: <mailman.721.1190126947.2658.python-announce-list@python.org>
	<87sl5by343.fsf@benfinney.id.au> <46F0633E.7020304@pytex.org>
	<87d4wfxw96.fsf@benfinney.id.au>
Message-ID: <46F0C3CF.7090505@pytex.org>

Ben Finney wrote:
> [Jonathan, please don't send me copies of messages sent to the
> discussion thread. I follow comp.lang.python via a non-mail interface,
> and it's irritating to get unwanted copies of messages via email.]

[Thank you for letting me know your preference.  For myself, I often 
appreciate it when people send me a copy directly.]

>>The line
>>     plus(2, '', _ex=TypeError)
>>causes something to be recorded,

<snip>

> That's confusing, then, for two reasons:
> 
> It looks like '_ex' is an argument to the 'plus' function, which
> otherwise (probably by design) looks exactly like a call to the 'plus'
> function the programmer is testing. 

Actually, 'plus' above is an instance of a class (which for now we will 
call PyUnknown) that has a __call__ method.  We know this because we 
imported it from metaclass.py.mymod.

It is, if you like, a /test surrogate/ or /instrumented wrapper/ for the 
function 'plus' in mymod.  And as such it has different properties.  For 
example, the '_ex' parameter has a special significance.

> Since this is, instead, an
> assertion *about* that function, it is misleading to see it as an
> argument *to* the function.

Although, by design, it looks like an argument to 'plus' in mymod, it is 
  as I said an argument to 'plus' in metatest.py.mymod, which is 
something completely different, namely a PyUnknown object.

We can think of test-first programming as
1.  Stating the problem to be solved.
2.  Solving that problem.

In mathematics, we often use unknowns when stating problems.  We can 
think of a PyUnknown as being analogous, in programming, to the unknowns 
we use in mathematics.

However, if the difference confuses one (and it can in some situations), 
then instead do
     from metatest.py.mymod import plus as mt_plus
and then the confusing line becomes
     mt_plus(2, '', _ex=TypeError)
which I think you will find much clearer.

> It uses the "leading-underscore" convention which means "this is not
> part of the public interface, and you'd better know what you're doing
> if you use this externally".

This convention is exactly that, a convention.  Conventions allow us to 
communicate efficiently, without spelling everything out.  Implicit in 
metatest are some other conventions or the like.  Oh, and this use of 
metatest does confirm to the convention, and extra knowledge is required 
to use leading underscore parameters.

>>Finally, if you can think of a better way of saying, in Python, "The
>>function call plus(2, '') raises a TypeError", please let me know,
>>and I'll consider using it in the next version of Metatest.
>  
> I would think an explicit function call that says what it's doing
> would be better. The unittest module implements this as:
> 
>     self.failUnlessRaises(TypeError, plus, 2, '')
<snip>
> which has the benefit of being explicit about what it's doing.

Well, you did not tell me what self is (althout I guessed it is an 
instance of a subclass of unittest.TestCase).  Nor did you tell me that 
this statement is part of a class method.

To my eye, your example puts the focus on failUnlessRaises and on 
TypeError.  I think the metatest way puts an equal focus on calling 
plus(2, '') and the result of this call.

I give a comparison of three ways of writing tests in my slides:
    http://metatest.sourceforge.net/doc/pyconuk2007/metatest.html#slide13

To summarise:  both metatest and unittest require the user to know 
something.  Once that something is known, the choices for the crucial 
test line are
     plus(2, '', _ex=TypeError)
     self.failUnlessRaises(TypeError, plus, 2, '')

I hope you know find the first option less confusing.  (It certainly is 
shorter.)

-- 
Jonathan



From bignose+hates-spam at benfinney.id.au  Tue Sep 25 21:24:37 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 26 Sep 2007 11:24:37 +1000
Subject: Python XML API's that preserve XML comments?
References: <pan.2007.09.26.00.58.55.406301@gmail.com>
Message-ID: <871wcmmd62.fsf@benfinney.id.au>

Dan Stromberg <dstromberglists at gmail.com> writes:

> Are there any python XML parsing API's that preserve comments

(I think you mean "python XML parsing libraries"; it's the library,
not the API, that preserves comments or not.)

I don't have an answer, but this may help to get more information.
The XML 1.0 specification allows for, but does not require, retention
of comments for access by the application:

    2.5 Comments

    [Definition: .... an XML processor MAY, but need not, make it
    possible for an application to retrieve the text of comments. ...]

    <URL:http://www.w3.org/TR/REC-xml/#sec-comments>

-- 
 \     "Demagogue: One who preaches doctrines he knows to be untrue to |
  `\                  men he knows to be idiots."  -- Henry L. Mencken |
_o__)                                                                  |
Ben Finney


From fredrik at pythonware.com  Wed Sep 26 08:23:16 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 26 Sep 2007 14:23:16 +0200
Subject: setuptools without unexpected downloads
In-Reply-To: <1190808836.056298.232640@57g2000hsv.googlegroups.com>
References: <87ejgmklep.fsf@benfinney.id.au><874phhlupi.fsf@benfinney.id.au>	<5lumarFae888U1@mid.uni-berlin.de>	<1190802526.695391.326220@n39g2000hsh.googlegroups.com>	<5lurorFa92euU1@mid.uni-berlin.de>	<1190805012.275901.227570@57g2000hsv.googlegroups.com>	<5luv0iFaai82U1@mid.uni-berlin.de>
	<1190808836.056298.232640@57g2000hsv.googlegroups.com>
Message-ID: <fddivk$f90$1@sea.gmane.org>

Paul Boddie wrote:

> P.S. Of course, the package maintainer problem manifests itself most
> prominently on Windows where you often see people asking for pre-built
> packages or installers.

for the record, I'd love to see a group of volunteers doing stuff like 
this for Windows.  there are plenty of volunteers that cover all major 
Linux/*BSD distributions (tons of thanks to everyone involved in this!), 
but as far as I can remember, nobody has ever volunteered to do the same 
for Windows.

</F>



From steve at holdenweb.com  Fri Sep 14 11:16:03 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 14 Sep 2007 11:16:03 -0400
Subject: newbee: Simple Backend Python Script Question
In-Reply-To: <372de840709140727x65b58400jadccb24bbabbdf62@mail.gmail.com>
References: <372de840709140727x65b58400jadccb24bbabbdf62@mail.gmail.com>
Message-ID: <fce8jm$564$1@sea.gmane.org>

joe shoemaker wrote:
> I need to create python script that is threaded. So the main program 
> will run in infinite loop and just retrieving messages and putting them 
> in a queue. (Main thread)
> 
> I need child threads from a pool to process the queue. When there is no 
> stuff in the queue, they go to the pool and become available but they 
> don't terminate. This has to be done continuously.
> 
> Main program need to keep putting stuff in the queue, when there are no 
> messages, then it sleeps for short time and check back to see any messages.
> 
> To do this, I guess you don't write joinAll(), so that the main threads 
> just don't wait for the child but goes to work.
> 
> am I right?
> 
Pretty much. The way I usually do this is to start a number of threads 
reading work items of some sort from a Queue.Queue. The thread will 
block automatically if there's nothing on the queue, resuming when 
something appears (and if I want orderly termination I use None as a 
dummy work unit, and the threads terminate when they receive a None, but 
any sentinel value would do).

> Also, child threads (a function that is threaded) will make connecitons 
> to the database. I am planning to use threadpool, so that threads reuse 
> the connections. So do you close the database connection at the end of 
> the function? If not then the connection will be opened forever?
> 
You don't want a thread pool, you want a connection pool, but there's 
little advantage to having one that is only shared between your threads. 
You really need a system-wide connection pool. Alternatively, you might 
find that your database module is thread-safe to the extent that 
different threads can use cursors created on the same connection without 
interference.

If you want each thread to be able to process transactions that are 
invisible to the other threads before they are committed you should 
ensure that you have a sufficient isolation level, which might imply the 
need for a connection-per-thread architecture, in which case you might 
expect some benefit from connection pooling.

regards
  Steve

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From horpner at yahoo.com  Sun Sep 16 18:10:45 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Sun, 16 Sep 2007 22:10:45 GMT
Subject: Parsing problems: A journey from a text file to a directory tree
References: <1189958074.670245.17910@n39g2000hsh.googlegroups.com>
Message-ID: <FRhHi.38567$G23.34664@newsreading01.news.tds.net>

On 2007-09-16, Martin M. <martinmichel at ame-electroplating.com> wrote:
> Hi everybody,
>
> Some of my colleagues want me to write a script for easy folder and
> subfolder creation on the Mac.
>
> The script is supposed to scan a text file containing directory trees
> in the following format:
>
> [New client]
>|-Invoices
>|-Offers
>|--Denied
>|--Accepted
>|-Delivery notes

Would it make sense to store it like this?

[('New client',
  [('Invoices', []),
   ('Offers', [('Denied', []), ('Accepted', [])]),
   ('Delivery notes', [])]]

> First I thought of an array like this:
>
> dirtreedb = {'New client': {'Invoices': {}, 'Offers': {'Denied': {},
> 'Accpeted': {}}, 'Delivery notes': {}}}

A dictionary approach is fine if it's OK for the directories to
be unordered, which doesn't appear to be the case.

> But this doesn't do the trick, as I also have to save the
> hierarchy level of the current folder as well...

The above does store the hierarchy, as the number of nesting
levels.

ditreedb['New Client']['Offers']['Denied']

-- 
Neil Cerutti


From google at mrabarnett.plus.com  Mon Sep 10 18:41:07 2007
From: google at mrabarnett.plus.com (MRAB)
Date: Mon, 10 Sep 2007 15:41:07 -0700
Subject: Silent SaveAs when using the Excel win32com module
In-Reply-To: <mailman.331.1189441459.2658.python-list@python.org>
References: <1189439861.200686.245420@k79g2000hse.googlegroups.com>
	<mailman.331.1189441459.2658.python-list@python.org>
Message-ID: <1189464067.350512.285230@k79g2000hse.googlegroups.com>

On Sep 10, 5:24 pm, "Hamilton, William " <wham... at entergy.com> wrote:
> > From: Chris
>
> > I'm trying to create an excel file which will act as a log, however I
> > want to overwrite the file if it exists.
>
> > Looking at the SaveAs method I can't find anything that would allow
> > it. I don't want the prompt to appear to ask whether to replace the
> > file or not. I just want to replace it without thinking.
>
> > Thanks in advance.
>
> Check if the file exists and delete it before saving the new one.
>
It's more Pythonic to delete the file and catch the exception if it
doesn't actually exist.



From sergio.correia at gmail.com  Mon Sep  3 03:57:57 2007
From: sergio.correia at gmail.com (Sergio Correia)
Date: Mon, 3 Sep 2007 02:57:57 -0500
Subject: PYTHONPATH not working on Windows XP (?)
In-Reply-To: <1188804742.738490.50470@19g2000hsx.googlegroups.com>
References: <mailman.305.1188798242.28954.python-list@python.org>
	<1188804742.738490.50470@19g2000hsx.googlegroups.com>
Message-ID: <f1aa6d810709030057q658a5dbhb8ce4d1813740e02@mail.gmail.com>

Thanks!

It worked straightforward, and it's easier than messing with the
enviromental variables or the registry.

BTW, I'm still wondering how did Autohotkey got included in sys.path
(there are no other .pht files on my PC)

Regards,
Sergio

On 9/3/07, olivier <oliviermigeon at gmail.com> wrote:
> Hi,
>
> > Any suggestions for adding my path to sys.path permanently?
>
> You can write a file in Lib/site-packages with a 'pth' extension (the
> name itself doesn't matter) containing the path you want to add.
>
> Example:
> MyCustomLib.pth:
> C:/docs/utils
>
> And be careful with path separator on win32. It should be "/" or "\\",
> never "\".
>
> Regards,
>
>  Olivier
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From Michael.Coll-Barth at VerizonWireless.com  Sat Sep 29 15:58:22 2007
From: Michael.Coll-Barth at VerizonWireless.com (Michael.Coll-Barth at VerizonWireless.com)
Date: Sat, 29 Sep 2007 15:58:22 -0400
Subject: Program inefficiency?
In-Reply-To: <NYOBGCEXSMTP20ASIoV001511cb@nyobgcexsmtp20.uswin.ad.vzwcorp.com>
References: <mailman.1282.1191082697.2658.python-list@python.org>
	<NYOBGCEXSMTP20ASIoV001511cb@nyobgcexsmtp20.uswin.ad.vzwcorp.com>
Message-ID: <20070929195825.813C81E4005@bag.python.org>

 

> -----Original Message-----
> From: stdazi
> On Sep 29, 6:07 pm, Michael.Coll-Ba... at VerizonWireless.com wrote:
> 
> > You did not mention the OS, but because you are using
> > "pathname\editfile.txt", it sounds like you are using an MS OS.
From
> > past experience with various MS OSes, I found that as the number of
> > files in a directory increases the slower your process runs for each
> > file.  
> 
> how so?
> 

I said "sounds like", which means I was guessing.  In *nix ( the ones I
know ), it would have been "pathname/editfile.txt".  But, it was the
file extension that caught my eye.  I had a project a while back that
required a mass conversion of jpeg files and ran into what sounded like
a similar problem.  


The information contained in this message and any attachment may be
proprietary, confidential, and privileged or subject to the work
product doctrine and thus protected from disclosure.  If the reader
of this message is not the intended recipient, or an employee or
agent responsible for delivering this message to the intended
recipient, you are hereby notified that any dissemination,
distribution or copying of this communication is strictly prohibited.
If you have received this communication in error, please notify me
immediately by replying to this message and deleting it and all
copies and backups thereof.  Thank you.



From ldo at geek-central.gen.new_zealand  Sat Sep  1 07:24:54 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 01 Sep 2007 23:24:54 +1200
Subject: Co-developers wanted: document markup language
References: <87odgyyx9u.fsf@wilson.homeunix.com>
	<fakrtb$2ts$1@panix3.panix.com>
	<87tzqpew22.fsf@wilson.homeunix.com>
	<fal3cv$bi2$1@panix3.panix.com>
	<87tzqp77my.fsf@wilson.homeunix.com>
	<7xy7g1if24.fsf@ruckus.brouhaha.com>
Message-ID: <fbbi1h$cdd$2@lust.ihug.co.nz>

In message <7xy7g1if24.fsf at ruckus.brouhaha.com>, Paul Rubin wrote:

> TeX/LateX have been around forever and are well established standards,
> as awful as they are.  Why do we want ANOTHER markup language?  We
> need fewer, not more.

Because time marches on, and the deficiencies of the old way of doing things
become more obvious, not less. For all the wonderful layout capabilities of
TEX, I've never seen a decent font done with METAFONT--not a single one.
They all looked like rubbish compared to what was available with those
early PostScript-based Apple LaserWriters.

By the way, did you know there was life before TEX? Back in that era, the
main open-source markup system in use was ... troff. Still not quite dead
today, it lives on in the definition of Unix/Linux man pages.


From zzbbaadd at aol.com  Thu Sep 27 23:18:22 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Thu, 27 Sep 2007 20:18:22 -0700
Subject: Python 3.0 migration plans?
In-Reply-To: <87641v4j38.fsf@benfinney.id.au>
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>
	<87641v4j38.fsf@benfinney.id.au>
Message-ID: <1190949502.875203.57690@w3g2000hsg.googlegroups.com>


>
>   - Abstract Base Classes
>     <URL:http://www.python.org/dev/peps/pep-3119/>
>

I like how someone here characterized decorators - those silly @
things. They remind me of Perl. Not adding keywords for abstract and
static is like Perl not adding a keyword for class. But I know all
such additions are vigorously defended by the most ardent users of
each language.



From afriere at yahoo.co.uk  Tue Sep 18 21:11:21 2007
From: afriere at yahoo.co.uk (Asun Friere)
Date: Tue, 18 Sep 2007 18:11:21 -0700
Subject: Sets in Python
In-Reply-To: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
Message-ID: <1190164281.329970.321360@y27g2000pre.googlegroups.com>

On Sep 19, 10:39 am, sapsi <saptarshi.g... at gmail.com> wrote:

> My question is,
> 1) Why can't lists be hashed?

They are mutable.



From fakeaddress at nowhere.org  Sat Sep 22 17:17:38 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Sat, 22 Sep 2007 21:17:38 GMT
Subject: Getting rid of bitwise operators in Python 3?
In-Reply-To: <1190484589.890198.266430@y42g2000hsy.googlegroups.com>
References: <46f49740$0$32514$4c368faf@roadrunner.com>
	<miaJi.28220$eY.3184@newssvr13.news.prodigy.net>
	<1190484589.890198.266430@y42g2000hsy.googlegroups.com>
Message-ID: <SDfJi.54712$YL5.36046@newssvr29.news.prodigy.net>

richyjsm at gmail.com wrote:
> Bryan Olson  wrote:
>> One surprising result was that more of the Python
>> programmers surveyed use bitwise operators than are aware
>> of the exponentiation operator, which C does not offer.
> 
> On that subject, I'd suggest that the pow() builtin (not the **
> operator - just the pow() function) should also be a candidate for
> removal...

A darn good candidate, I'd say. I'm biased because I once took
quite a while to figure out that importing the math module's
'pow' was how I broke my code.

The operator module offers pow(). Is there any good reason for
pow() as a built-in?


-- 
--Bryan


From steve at holdenweb.com  Fri Sep 28 08:16:05 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 28 Sep 2007 08:16:05 -0400
Subject: Bug: spurious indentation error
In-Reply-To: <33dffc910709280441p14f78175n8549bdb315416328@mail.gmail.com>
References: <33dffc910709280441p14f78175n8549bdb315416328@mail.gmail.com>
Message-ID: <fdira5$n6a$1@sea.gmane.org>

Mridula Ramesh wrote:
> hi.
> 
> is this the right place to report a bug?
> 
> i had written this by mistake:
>    filemenu = Menu(menu) , bg="White")
> 
> instead of
>   filemenu = Menu(menu, bg="Pink")
> 
> and the compiler kept giving me an indentation error in a line much 
> further down which was perfectly okay.
> 
> i am using python 2.5.1 with IDLE 1.2.1 on a windows XP machine.
> anyone else struggling with the same thing, beware! :)
> 
> -mridula.
> 
This is probably a bug in your mind, not in the compiler ;-)

Without more detail (i.e. the complete code or a sizable and relevant 
chunk of it, pkus the copied error message) it's impossible to say 
exactly what was happening. However I am pretty confident that the 
2.5.21 compiler will immediately report an unopened closing parenthesis 
as a syntax error.

 >>> something = "abc".replace("c"), "d")
   File "<stdin>", line 1
     something = "abc".replace("c"), "d")
                                        ^
SyntaxError: invalid syntax
 >>>

So, what was the problem again? Give us a little more detail,  please.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From gagsl-py2 at yahoo.com.ar  Wed Sep 26 01:52:33 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 26 Sep 2007 02:52:33 -0300
Subject: the address of list.append and list.append.__doc__
References: <1190775258.351819.24930@22g2000hsm.googlegroups.com>
	<mailman.1077.1190776788.2658.python-list@python.org>
	<1190780557.879816.13800@d55g2000hsg.googlegroups.com>
Message-ID: <op.ty8ylvzax6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 26 Sep 2007 01:22:37 -0300, HYRY <ruoyu0088 at gmail.com> escribi?:

> I installed python 2.4.4 and tried id(list.append.__doc__) again, here
> is the result, only id(list.append.__doc__) changes, this is strange,
> and only happened in the command line. Because I am doing something
> program that use this id in the command line. Can someone help me try
> this on your PC, I want to know which is the problem: this version of
> python, or my PC.

"the problem"?
Perhaps if you explain what you really want to do, someone can think the  
way to do that, most likely *not* using id()

>>>> id(list.count.__doc__)
> 11863968
>>>> id(list.count.__doc__)
> 11863968
>>>> id(list.count.__doc__)
> 11863968
>>>> id(list.count.__doc__)
> 11863968

This behavior is an accident. The actual doc strings are stored as C  
null-terminated strings inside the C structures defining the list type.  
When you request list.append.__doc__, a Python string object has to be  
built pointing to the original C string. After the call to id(), nobody  
references that string object, and it is garbage collected. Next time you  
request the same thing, depending on the details on how the memory  
allocator works, it may or may not reuse the same memory address. Try with  
some print "hello" in between those id calls.

-- 
Gabriel Genellina



From bj_666 at gmx.net  Sun Sep 16 06:58:07 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 16 Sep 2007 10:58:07 GMT
Subject: Needless copying in iterations?
References: <fchk59$mm3$1@daisy.noc.ucla.edu>
	<5l3ab6F5v20uU3@mid.uni-berlin.de> <13eourdrne86e61@corp.supernews.com>
	<874phv42to.fsf@benfinney.id.au> <13epv3fnb6bak15@corp.supernews.com>
Message-ID: <5l4ghuF655kfU2@mid.uni-berlin.de>

On Sun, 16 Sep 2007 09:50:39 +0000, Steven D'Aprano wrote:

> The point is rather moot, since CPython (and probably other Pythons) do 
> almost no optimizations. But just because Python is a dynamic language 
> doesn't mean there are no optimizations possible: Haskell is a dynamic 
> language, and there are optimizing compilers for it. Of course, it is 
> much simpler for Haskell, because of the type system it uses.

What do you mean by Haskell is a dynamic language?  It is statically and
strict typed and the compiler usually knows all the functions.  No
"surprises", no side effects, no duck typing.

Ciao,
	Marc 'BlackJack' Rintsch


From tdelaney at avaya.com  Wed Sep 26 05:40:24 2007
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Wed, 26 Sep 2007 17:40:24 +0800
Subject: sorting a list numbers stored as strings
In-Reply-To: <FycKi.121101$%k.267260@twister2.libero.it>
Message-ID: <E4C7BCAB1872014F81CEAACD25699B8C0849BA@301081ANEX2.global.avaya.com>

ZeD wrote:

> thebjorn wrote:
> 
>>>>>> int("020")
>>> 20
>>>>>> 020
>>> 16
>> 
>> You can get the latter behavior using eval:
> 
> why using eval when int has the "base" optional parameter?
> 
>>>> int("020")
> 20
>>>> int("020", 8)
> 16
>>>> int("09", 8)
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> ValueError: invalid literal for int() with base 8: '09'

The whole point of this was I misremembered what the base/radix optional
parameter of int() defaulted to - I thought it was 0, then when I
checked in Python 2.5 I thought it must have been 0 in an earlier
version.

Tim Delaney


From dvkeeney at gmail.com  Wed Sep  5 13:12:43 2007
From: dvkeeney at gmail.com (dkeeney)
Date: Wed, 05 Sep 2007 17:12:43 -0000
Subject: PythonAlley.com
In-Reply-To: <mailman.92.1189002436.2658.python-list@python.org>
References: <mailman.92.1189002436.2658.python-list@python.org>
Message-ID: <1189012363.397845.174960@y42g2000hsy.googlegroups.com>


The Python community would benefit from a moderated web-forum along
the lines of
perlmonks.org.

The Python community online now seems to have two major segments, the
c.l.p newsgroup (here),
and a large selection of blogs.  C.l.p is unmoderated and often
hostile.  The bloggers
self-moderate reasonably well (to my observation), but the blogs,
individually and
in aggregate, look 'read-only' to newbies, in that questions are not
welcomed.

A moderated forum that gives recognition to the experienced and
tolerance to newbies would be a good thing.

David

On Sep 5, 10:27 am, "Shawn Milochik" <Sh... at Milochik.com> wrote:
> I bought the domain PythonAlley.com (and PerlAlley.com and
> RubyAlley.com) not too long ago. I had the inspiration to make some
> kind of community site thing, but never did get around to it.
>
> Does anyone have any ideas as to what a wonderful use for
> PythonAlley.com would be? I'd really like to do something with at
> least the Python site, since I love Python. Not too sure about the
> others -- maybe I'm make them wikis and open them up to the community.
> Maybe I should just sell them.
>
> Ideas?
>
> Thanks,
> Shawn




From geoffness8 at gmail.com  Tue Sep 18 06:03:58 2007
From: geoffness8 at gmail.com (geoff_ness)
Date: Tue, 18 Sep 2007 10:03:58 -0000
Subject: UnicodeEncodeError in Windows
In-Reply-To: <mailman.670.1190057854.2658.python-list@python.org>
References: <1190025496.308969.51400@n39g2000hsh.googlegroups.com>
	<mailman.670.1190057854.2658.python-list@python.org>
Message-ID: <1190109838.071973.251910@19g2000hsx.googlegroups.com>

On Sep 18, 7:36 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Mon, 17 Sep 2007 07:38:16 -0300, geoff_ness <geoffne... at gmail.com>
> escribi?:
>
>
>
> > def buildString(warrior):
> >         """Build a string from a warrior's stats
>
> >         Returns string for output to warStat."""
> >         return "!tr!!td!!id!"+str(warrior.ID)+"!/id!!/td!"+\
> >         "!td!"+str(warrior.damage)+"!/td!!td!"+str(warrior.kills)+\
> >         "!/td!!td!"+str(warrior.survived)+"!/td!!/tr!"
>
> > This code runs fine on my linux machine, but when I sent the code to a
> > friend with python running on windows, he got the following error:
>
> > Traceback (most recent call last):
> >  File "C:\Documents and Settings\Administrator\Desktop
> > \reparser_014(2)\iotp_alt2.py", line 169, in buildString
> >    "!/td!!td!"+str(warrior.survived)+"!/td!!/tr!"
> > UnicodeEncodeError: 'ascii' codec can't encode character u'\ufeff' in
> > position 0: ordinal not in range(128)
>
> > As I understand it the error is related to the ascii codec being
> > unable to cope with the unicode string u'\ufeff'.
> > The issue I have is that this error doesn't show up for me - ascii is
> > the default encoding for me also. Any thoughts or assistance would be
> > welcomed.
>
> Some of those `warrior` attributes is an Unicode object that contains
> characters outside ASCII. str(x) tries to convert to string, using the
> default encoding, and fails. This happens on Windows and Linux too,
> depending on the data.
> I've seen that you use codecs.open: you should write Unicode objects to
> the file, not strings, and that would be fine.
> Look for some recent posts about this same problem.
>
> --
> Gabriel Genellina

Thanks Gabriel, I hadn't thought about the str() function that way - I
had initially used it to coerce the attributes which are type int to
type str so that I could write them to the output file. I've rewritten
the buildString() function now so that the unicode objects don't get
fed to str(), and apparently windows copes ok with that. I'm still
puzzled as to why python at my end had no problem with it...



From ndbecker2 at gmail.com  Fri Sep 28 06:35:29 2007
From: ndbecker2 at gmail.com (Neal Becker)
Date: Fri, 28 Sep 2007 06:35:29 -0400
Subject: getopt with negative numbers?
References: <1190913250.198794.269530@k79g2000hse.googlegroups.com>
	<fdgpic$ssu$00$1@news.t-online.com>
	<1190915197.390247.313590@57g2000hsv.googlegroups.com>
	<fdgri5$ssu$00$2@news.t-online.com>
	<mailman.1182.1190917341.2658.python-list@python.org>
	<1190930134.780005.68510@22g2000hsm.googlegroups.com>
	<mailman.1196.1190937544.2658.python-list@python.org>
	<1190944143.521085.66910@g4g2000hsf.googlegroups.com>
	<871wcj4ib9.fsf@benfinney.id.au>
Message-ID: <fdilee$399$1@sea.gmane.org>

Ben Finney wrote:

> Casey <Caseyweb at gmail.com> writes:
> 
>> Well, it is a hack and certainly not as clean as having getopt or
>> optparse handle this natively (which I believe they should).
> 
> I believe they shouldn't because the established interface is that a
> hyphen always introduced an option unless (for those programs that
> support it) a '--' option is used, as discussed.

I don't agree.  First of all, what is 'established interface'?  There are
precedents from well-known C and C++ libraries, such as 'getopt', 'popt',
and boost::program_options.  IIRC, each of these will treat a negative
number following an option that requires a number as a number.

Besides this, the behavior I just described is really required.  Otherwise,
numeric options are basically broken.




From tenax.raccoon at gmail.com  Wed Sep 19 09:35:47 2007
From: tenax.raccoon at gmail.com (Jason)
Date: Wed, 19 Sep 2007 13:35:47 -0000
Subject: Keeping a database connection with a Singleton?
In-Reply-To: <1190208406.041953.115580@g4g2000hsf.googlegroups.com>
References: <1190208406.041953.115580@g4g2000hsf.googlegroups.com>
Message-ID: <1190208947.351094.197010@57g2000hsv.googlegroups.com>

On Sep 19, 7:26 am, "exhuma.twn" <exh... at gmail.com> wrote:
> I remember reading about the Singleton pattern in python and how it's
> an unpythonic pattern and all. At the time I did not need the
> Singleton anyways, so I just glanced over the document.
>
> But, setting this aside: I have an application where I have a
> connection to a database. At some point in the application I open up a
> new window. The new windows resides in a different module. So I have a
> directory structure like this:
>
> - mainapp.py
> - newwindow.py
>
> So I import "newwindow" in "mainapp"  so I can instantiate and display
> it. Meanwhile, the main-app has an open connection to the database.
> What's the cleanest way to hand this connection to the new window? I
> can see several possibilities:
>
> 1) Simply pass the connection as paramtere to the constructor of new-
> window.
> 2) Use the "Singleton" deisign pattern to keep a reference to the
> connection
> 3) Open up a completely new connection to the database in the new
> window.
>
> Now, option 1) is clearly the easiest to implement, however, I somehow
> tend to use option 2 (the singleton) as it's more flexible. Option 3
> looks ugly to me.
>
> This is a stuation I run into many times. And I am always faced with
> the same choice. And I never know which one to chose. And now that I
> am getting more and more comfortable with the basics of python, I
> would like to know if I am missing something more "pythonic".
>
> So, what would you recommend?

You don't need a way to make every instance the same.  You need a way
where every instance shares the same state.  Aka, the Borg pattern,
courtesy of Alex Martelli.  It's in the Python Cookbook at "http://
aspn.activestate.com/ASPN/Cookbook/Python/Recipe/66531".  Good luck!

  --Jason



From dfedoruk at gmail.com  Fri Sep 14 04:33:57 2007
From: dfedoruk at gmail.com (Dmitri Fedoruk)
Date: Fri, 14 Sep 2007 08:33:57 -0000
Subject: lxml + mod_python: cannot unmarshal code objects in restricted
	execution mode
In-Reply-To: <1189724657.261461.181420@22g2000hsm.googlegroups.com>
References: <1189688758.587404.139360@r29g2000hsg.googlegroups.com>
	<1189724657.261461.181420@22g2000hsm.googlegroups.com>
Message-ID: <1189758837.599777.6890@o80g2000hse.googlegroups.com>

On Sep 14, 3:04 am, Graham Dumpleton <Graham.Dumple... at gmail.com>
wrote:
> Try forcing mod_python to run your code in the first interpreter
> instance created by Python.
>   PythonInterpreter main_interpreter
Thank you very much, that solved the problem! A more detailed
discussion can also be found in the lxml-dev mailing list (
http://comments.gmane.org/gmane.comp.python.lxml.devel/2942 )

Dmitri



From hat at se-162.se.wtb.tue.nl  Wed Sep 26 08:24:56 2007
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Wed, 26 Sep 2007 14:24:56 +0200
Subject: Asynchronous Messaging
References: <1190807252.731074.141450@k79g2000hse.googlegroups.com>
Message-ID: <slrnffkjso.498.hat@se-162.se.wtb.tue.nl>

On 2007-09-26, wink <wink at saville.com> wrote:
> Hello,
>
> I'm getting my feet wet in Python and thought I'd try to see how well
> Python works for asynchronous messaging. I've been using asynchronous

Have a look at Twisted (www.twistedmatrix.com)


Albert



From rschroev_nospam_ml at fastmail.fm  Wed Sep 12 10:17:24 2007
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Wed, 12 Sep 2007 14:17:24 GMT
Subject: An ordered dictionary for the Python library?
In-Reply-To: <1189601205.503841.327170@o80g2000hse.googlegroups.com>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<13efnmi4n959a59@corp.supernews.com>
	<1189601205.503841.327170@o80g2000hse.googlegroups.com>
Message-ID: <UxSFi.101565$Zo.4667421@phobos.telenet-ops.be>

Michele Simionato schreef:
> On Sep 12, 2:42 pm, Steven D'Aprano <st... at REMOVE-THIS-
> cybersource.com.au> wrote:
>> On Wed, 12 Sep 2007 07:33:45 +0000, Mark Summerfield wrote:
>> In fact, I'm not sure what people mean by ordered dicts. I assume they
>> mean the keys are ordered, not the values. But ordered by what? Insertion
>> order? Modification order? Alphabetical order?
> 
> Insertion order.

Mark referred to C++ and the sort function, so I assume he meant 
alphabetical order (or the equivalent for types other than strings).

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From hosalo at _NO_SPAM_gmail.com  Tue Sep 25 10:41:23 2007
From: hosalo at _NO_SPAM_gmail.com (Heikki Salo)
Date: Tue, 25 Sep 2007 14:41:23 GMT
Subject: directpython question
In-Reply-To: <fd5apt029m@enews1.newsguy.com>
References: <fd5apt029m@enews1.newsguy.com>
Message-ID: <n69Ki.155$oe5.75@read3.inet.fi>

veki wrote:
> Hello,
> I've got IBM Thinkpad 30 laptop with configuration:
> 
> IBM Thinkpad R30
> P3 Mobile Celeron 900mhz
> 128mb sdram pc133
> 15gb hdd
> cd-rom Teac cd-224e
> 56K V.90/92
> 10/100 Ethernet
> lpt port
> ps2 port
> 2 x usb port
> vga-out
> pcmcia
> 
> ,then I have been install directx 9.0c,Python 2.5 and directpython for
> python 2.5.On my two computers directpython works but on this
> laptop it don't want work e.g:
> 
> When I want execute this script on laptop:
> 
> import d3dx
> frame=d3dx.Frame(u'SOME FRAME')
> frame.mainloop()
> 
> I get this error:
> 
> Traceback (most recent call last):
>   File "C:\Python25\Lib\site-packages\veki1.py", line 2, in <module>
>     fr=d3dx.Frame(u'SOME FRAME')
>   File "C:\Python25\lib\site-packages\directpy\d3dx.py", line 639, in
> __init__
>     self._createDevice(area[2:4])
>   File "C:\Python25\lib\site-packages\directpy\d3dx.py", line 659, in
> _createDevice
>     raise RuntimeError("No valid mode found")
> RuntimeError: No valid mode found
> 
> Regards,
> Vedran
> 
> 

As Tim already noted, your laptop apparently uses Trident 
CyberBlade Ai1 graphics card, which is quite old and designed 
for DirectX 6-8. This is not a problem if the device driver is 
up to date, but the newest I found seems to be from 2003. This 
can be a problem if it does not correctly support DirectX 9.0c 
(released in 2004).

You should see what the DirectX diagnostics tool says 
(dxdiag.exe - found in WINDIR\system32) and possibly update 
the driver. Then cross your fingers and see what happens.

--
Heikki Salo


From paul at boddie.org.uk  Thu Sep 20 17:51:26 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Thu, 20 Sep 2007 14:51:26 -0700
Subject: M2Crypto 0.18 - new version, same old build bugs.
In-Reply-To: <eiAIi.10067$924.3670@newssvr23.news.prodigy.net>
References: <eiAIi.10067$924.3670@newssvr23.news.prodigy.net>
Message-ID: <1190325086.825866.319760@k79g2000hse.googlegroups.com>

On 20 Sep, 22:12, John Nagle <na... at animats.com> wrote:
>
>     That was for M2Crypto 0.17.
>
>     It's still broken in M2Crypto 0.18.
>
>     And there's no RPM or Windows binary.
>
>     Nobody actually uses this stuff, do they?

I can find Ubuntu packages for 0.16 and 0.17:

http://packages.ubuntu.com/feisty/libs/python-m2crypto
http://packages.ubuntu.com/gutsy/libs/python-m2crypto

So, clearly some people are managing to build the library, even if it
isn't the absolute latest version. You might want to take a look at
the source packages and the patches the distribution people apply,
although it doesn't look like they are actually doing much patching.
The source packages suggest that they use SWIG 1.3.24 to build
M2Crypto - is that what you're using?

Paul



From aahz at pythoncraft.com  Tue Sep 18 10:57:12 2007
From: aahz at pythoncraft.com (Aahz)
Date: 18 Sep 2007 07:57:12 -0700
Subject: Using pseudonyms (was Re: Python 3K or Python 2.9?)
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46ee2d9d$0$26213$426a74cc@news.free.fr>
	<fcn81q$g80$1@panix3.panix.com>
	<46ef893c$0$21882$426a34cc@news.free.fr>
Message-ID: <fcop08$2ue$1@panix3.panix.com>

In article <46ef893c$0$21882$426a34cc at news.free.fr>,
Bruno Desthuilliers  <bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote:
>Aahz a ?crit :
>> In article <46ee2d9d$0$26213$426a74cc at news.free.fr>,
>> Bruno Desthuilliers  <bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote:
>>>
>>> But what, given that I'm an AOL user still thinking it's kewl to hide 
>>> behind a pseudo, what else would you expect ?
>> 
>> What exactly is a "pseudo", pray tell?
>
>Sorry : a pseudonym (a nickname).

You apparently missed the thrust of my sarcasm.  You can't tell what is
or is not a pseudonym online.  For all I know, "Bruno Desthulliers" is a
pseudonym.  While I recognize that there is some social advantage to
linking consistent identifiers with people, I have I think understandable
irritation with people who insist that names follow certain patterns.

(For those joining only recently, my full legal name is "Aahz", which I
changed from my former name precisely because of attitudes like Bruno's.)
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

The best way to get information on Usenet is not to ask a question, but
to post the wrong information.


From gagsl-py2 at yahoo.com.ar  Thu Sep  6 20:53:04 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 06 Sep 2007 21:53:04 -0300
Subject: Using wild character
References: <1189054805.447871.213150@y42g2000hsy.googlegroups.com>
	<1189058095.671230.262190@o80g2000hse.googlegroups.com>
	<5k9pjoF2mrncU1@mid.uni-berlin.de>
	<1189122511.231602.217710@w3g2000hsg.googlegroups.com>
Message-ID: <op.tx9d2qt2x6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 06 Sep 2007 20:48:31 -0300, Zentrader <zentraders at gmail.com>  
escribi?:
> On Sep 6, 12:47 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>>
>> Maybe better the ``in`` operator for the '*string*' type.  `str.find()`
>> will go away in the future.
>
> string.find serves a useful purpose in that it returns the starting
> location of the string found, or -1 if not found, so if you wanted to
> slice "abdecf" on"c", string.find will tell you where that is.

PEP3100 says it will be removed, but at the same time says [UNLIKELY]...
<http://www.python.org/dev/peps/pep-3100/#id36>

partition serves almost the same purpose and its easier to use.

-- 
Gabriel Genellina



From kw at codebykevin.com  Fri Sep 28 16:48:27 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Fri, 28 Sep 2007 16:48:27 -0400
Subject: List search
Message-ID: <eafb6$46fd68a3$4275d90a$4234@FUSE.NET>

I'm having a problem with searching a list. Here's my code:

mylist = ['x11', 'x11-wm', 'x11-system']

for line in mylist:
	if 'x11' in line:
		print line

This results in the following output:

x11
x11-wm
x11-system

I'm looking to return the list item that just has 'x11'.  How can I 
structure my search term so that this output is returned?


From musiccomposition at gmail.com  Thu Sep 27 22:34:45 2007
From: musiccomposition at gmail.com (Benjamin)
Date: Fri, 28 Sep 2007 02:34:45 -0000
Subject: developing an application
In-Reply-To: <1190930761.625756.309830@50g2000hsm.googlegroups.com>
References: <1190930761.625756.309830@50g2000hsm.googlegroups.com>
Message-ID: <1190946885.375600.272440@g4g2000hsf.googlegroups.com>

On Sep 27, 5:06 pm, yadin <conra2... at yahoo.com> wrote:
> hi!
> i was buiding an application using python...a program
> this was my first one...now that i got it working perfectly
> how can i put the bunch of files into one package?
> the user of the appliation will not know where to start? that is which
> file to click on in oder to start the program?
> thanks a lot

also you can make MacOS apps with the standard MacOS Python
distribution



From bardov at gmail.com  Wed Sep 19 08:17:16 2007
From: bardov at gmail.com (Dan Bar Dov)
Date: Wed, 19 Sep 2007 14:17:16 +0200
Subject: re question
Message-ID: <d6944c490709190517t390086d4m915b77b1cef5055a@mail.gmail.com>

I'm trying to construct a regular expression to match valid IP address,
without leading zeroes (i.e
1.2.3.4, 254.10.0.0, but not 324.1.1.1, nor 010.10.10.1)

This is what I come up with, and it does not work.

r'(^[12]?\d{0,2}\.){3,3}[12]?\d{0,2}'

What am I doing wrong?
Any common knowledge IP matching RE?

Thanks,
Dan
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From bdesth.quelquechose at free.quelquepart.fr  Sat Sep 15 13:33:21 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 15 Sep 2007 19:33:21 +0200
Subject: subclass of integers
In-Reply-To: <1189780201.692192.291010@k79g2000hse.googlegroups.com>
References: <1189780201.692192.291010@k79g2000hse.googlegroups.com>
Message-ID: <46ead728$0$12900$426a34cc@news.free.fr>

Mark Morss a ?crit :
> I would like to construct a class that includes both the integers and
> None.   I desire that if x and y are elements of this class, and both
> are integers, then arithmetic operations between them, such as x+y,
> return the same result as integer addition.  However if either x or y
> is None, these operations return None.
> 
> It's simple enough to construct a subclass of integers that behave in
> this way:
> 
> class Nint(int):
>     def __add__(self,other):
>         if (other != None):
>             return self+other
>         else:
>             return None
>     def __radd__(self,other):
>         if (other != None):
>             return other+self
>         else:
>             return None
>     #...and so forth
> 
> However I have not been able to figure out how to make it so that
> None, as well as an integer, could be an element of my class.  My
> preliminary impression is that I have to override int.__new__; but I
> am uncertain how to do that and have been unable to find anything on
> the web explaining that.  Indeed I haven't been able to find much
> about __new__ at all.  Overriding this method of built-in classes
> seems to be quite unusual.
> 
> I would very much appreciate anyone's help.

You'll find documentation in the FineManual(tm):
http://docs.python.org/ref/customization.html
http://www.python.org/download/releases/2.2.3/descrintro/#__new__

and a possible (even if imperfect IMHO) example in my answer to 
Zentrader in the thread.

Now would you be kind enough to satisfy my curiousity and explain your 
use case ?-)




From ldo at geek-central.gen.new_zealand  Fri Sep 21 07:46:09 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Fri, 21 Sep 2007 23:46:09 +1200
Subject: An Editor that Skips to the End of a Def
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk>
Message-ID: <fd0au1$fro$1@lust.ihug.co.nz>

In message <87hclpjm3a.fsf at rudin.co.uk>, Paul Rudin wrote:

> ... these days emacs comes with all sorts of
> pointing-clicky-menu-y type things - you don't really have to learn
> anything to get started.

After two decades of putting up with vi just to ensure compatibility with
every proprietary *nix system I might come across, let me just say ...

USE EMACS!

Oh, and <http://ars.userfriendly.org/cartoons/?id=20070910&mode=classic>.


From dandolls at yahoo.co.in  Sun Sep 23 13:18:01 2007
From: dandolls at yahoo.co.in (Amit Kumar Saha)
Date: Sun, 23 Sep 2007 22:48:01 +0530
Subject: [Bulk] Re: Writing Object Data to Disk
In-Reply-To: <18c1e6480709230934k61504fa1r528c2f4ade9722f0@mail.gmail.com>
References: <1190443648.5838.6.camel@ubuntu-laptop>
	<18c1e6480709230934k61504fa1r528c2f4ade9722f0@mail.gmail.com>
Message-ID: <1190567881.8165.1.camel@ubuntu-laptop>

On Sun, 2007-09-23 at 18:34 +0200, David wrote:
> > I would like to know if "Pickling" the class object is the only way of
> > writing it to disk for persistent storage. Also, do we have a concept
> > similar to "array of objects" in Python? The number of objects is only
> > known at "run-time".
> 
> Have a look at YAML.
> 
> http://freshmeat.net/projects/syck/
> 
> Also it is possible to persist python data to and from XML. See
> xml.marshal.generic.dumps

Thanks David :-)
I appreciate the XML related comment, but as of now I am ready-to-roll
with Python specific pickling. XML will be used in a later version of my
code!

Regards,
Amit
-- 
Amit Kumar Saha
me blogs@ http://amitksaha.blogspot.com
URL:http://amitsaha.in.googlepages.com




From stephanerufer at gmail.com  Thu Sep 20 03:01:16 2007
From: stephanerufer at gmail.com (Rufman)
Date: Thu, 20 Sep 2007 00:01:16 -0700
Subject: Python and RTF
Message-ID: <1190271676.160077.99270@w3g2000hsg.googlegroups.com>

Does anyone have a good rtf library for python, have exprience with
pyRTF or a link to a good tutorial?

thx Stephane



From effigies at gmail.com  Thu Sep  6 04:37:09 2007
From: effigies at gmail.com (Chris Johnson)
Date: Thu, 06 Sep 2007 08:37:09 -0000
Subject: Autogenerate functions (array of lambdas)
Message-ID: <1189067829.685339.50550@y42g2000hsy.googlegroups.com>

What I want to do is build an array of lambda functions, like so:

a = [lambda: i for i in range(10)]

(This is just a demonstrative dummy array. I don't need better ways to
achieve the above functionality.)

print [f() for f in a]

results in: [9, 9, 9, 9, 9, 9, 9, 9, 9, 9]
rather than the hoped for: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

Clearly, lambda is returning the object i, which is left at the last
value of range(10). The following is my solution.

t = lambda i: lambda: i
a = [t(i) for i in range(10)]

or the somewhat more terse:

a = [(lambda i: lambda: i)(i) for i in range(10)]

This gives the behavior which, intuitively, I expected from the
original syntax. So my questions are:
1) Does this make sense as what should be done here? That is, would
this be the behavior you'd want more often than not? As I said,
intuitively, I would think the lambda would treat the iterator
variable as a constant in this context.
2) Is there a better or preferred method than the one I've found?

Thanks,
Chris



From deets at nospam.web.de  Thu Sep  6 04:46:15 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 06 Sep 2007 10:46:15 +0200
Subject: Autogenerate functions (array of lambdas)
In-Reply-To: <1189067829.685339.50550@y42g2000hsy.googlegroups.com>
References: <1189067829.685339.50550@y42g2000hsy.googlegroups.com>
Message-ID: <5k9t33F2pforU1@mid.uni-berlin.de>

Chris Johnson schrieb:
> What I want to do is build an array of lambda functions, like so:
> 
> a = [lambda: i for i in range(10)]
> 
> (This is just a demonstrative dummy array. I don't need better ways to
> achieve the above functionality.)
> 
> print [f() for f in a]
> 
> results in: [9, 9, 9, 9, 9, 9, 9, 9, 9, 9]
> rather than the hoped for: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
> 
> Clearly, lambda is returning the object i, which is left at the last
> value of range(10). The following is my solution.
> 
> t = lambda i: lambda: i
> a = [t(i) for i in range(10)]
> 
> or the somewhat more terse:
> 
> a = [(lambda i: lambda: i)(i) for i in range(10)]
> 
> This gives the behavior which, intuitively, I expected from the
> original syntax. So my questions are:
> 1) Does this make sense as what should be done here? That is, would
> this be the behavior you'd want more often than not? As I said,
> intuitively, I would think the lambda would treat the iterator
> variable as a constant in this context.
> 2) Is there a better or preferred method than the one I've found?

The problem you encountered relates to the fact that the lambdas close 
around the names known when they were created - not the values bound to 
them.

To overcome that, bind the value you pass to a new name, like this:

a = [lambda i=i: i for i in range(10)]

Diez


From usenet+meow at aldan.algebra.com  Thu Sep 13 23:07:32 2007
From: usenet+meow at aldan.algebra.com (Mikhail Teterin)
Date: Thu, 13 Sep 2007 23:07:32 -0400
Subject: automatic parallelization
References: <KYidna_Q5d86FnTbnZ2dnUVZ_sSlnZ2d@speakeasy.net>
	<46E99488.20909@uni-oldenburg.de> <alior4-0pu.ln1@lairds.us>
Message-ID: <1338560.ksk72Tk4Kk@aldan.algebra.com>

Cameron Laird wrote:

> There are a LOT more possibilities one might pursue, depending
> on the details of Mr. Teterin's intent.

The reason I began wondering about this is that I like a particular
image-gallery generating tool called `imageindex'
(http://www.edwinh.org/imageindex/)

Unfortunately, it processes all given pictures sequentionally ignoring my
three other cores.

The tool is written in Perl, but I would consider rewriting it in Tcl or
Python, if the language made it easy to parallelize loops...

> I'm fond of Linda <URL:
> http://www.unixreview.com/documents/s=10125/ur0704l/ >, Parallel 
> Python <URL: http://www.parallelpython.com/ > only one of several
> initiatives which aspire to exploit multicores, and so on.

Linda URL does not open... I'll look into Parallel Python, but it is
an "execution server", which is a rather different approach from OpenMP's,
which I'm more familiar with.

Thanks!

        -mi


From ldo at geek-central.gen.new_zealand  Wed Sep 19 05:48:43 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Wed, 19 Sep 2007 21:48:43 +1200
Subject: Quick shallow-copy idiom
Message-ID: <fcqr9s$c4b$2@lust.ihug.co.nz>

y = type(x)(x)


From kostaspaxos at yahoo.gr  Tue Sep 18 05:20:03 2007
From: kostaspaxos at yahoo.gr (Konstantinos Pachopoulos)
Date: Tue, 18 Sep 2007 12:20:03 +0300
Subject: raw string
Message-ID: <46EF9843.1030507@yahoo.gr>

Hi,
i am trying to execute the following query on a DB:
qe.execQuery(r"SELECT * FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY 
'"' LINES TERMINATED BY '\n' FROM Commiter")

However, whether i put the r in the front or not, i always get an error 
about the "\n".
What's wrong?


From n.anand.k at gmail.com  Tue Sep 25 05:28:05 2007
From: n.anand.k at gmail.com (Anand)
Date: Tue, 25 Sep 2007 02:28:05 -0700
Subject: Inserting an element into existing xml file
Message-ID: <1190712485.761290.136570@50g2000hsm.googlegroups.com>

Hi,

I'm new to Python. we are using python2.4.

I wanted to insert an element into an existing xml file. Can anyone
help me with this?
I've seen lxml and elementTree in python2.5 has some API's to insert
into existing xml file.
We cant use python 2.5 due to some limitations. So how can we do it in
2.4?

Thanks in Advance,
Anand



From duncan.booth at invalid.invalid  Wed Sep 12 08:39:03 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 12 Sep 2007 12:39:03 GMT
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr>
Message-ID: <Xns99A98AE12D514duncanbooth@127.0.0.1>

Ivan Voras <ivoras at _fer.hr_> wrote:

>> I'd say Mr Eckel fails to graps some of the great points about 
Python's
>  
>> object model - the rant about the use of 'self' is a sure clue.
> 
> What does "self" have to do with an object model? It's an 
> function/method argument that might as well be hidden in the compiler 
> without ever touching the role it has (if not, why?). I agree that 
it's 
> needless noise in a language.

You could add some syntax to Python such that '.x' was equivalent to 
'<first argument of current function>.x' (either completely implicitly 
or with some surrounding block that lets you specify the assumed 
variable. 

That wouldn't break anything in the syntax but the general feeling of 
the Python community is that such a change would be undesirable as it is 
better to write the variable name out explicitly.

As for omitting 'self' from method definitions, at first site you might 
think the compiler could just decide that any 'def' directly inside a 
class could silently insert 'self' as an additional argument. This 
doesn't work though because not everything defined in a class has to be 
an instance method: static methods don't have a self parameter at all, 
class methods traditionally use 'cls' instead of 'self' as the name of 
the first parameter and it is also possible to define a function inside 
a class block and use it as a function. e.g.

class Weird:
   def factory(arg):
       """Returns a function based on its argument"""

   foo = factory("foo")
   bar = factory("bar")
   del factory

When factory is called, it is a simple function not a method. If it had 
gained an extra parameter then either you would have to explicitly pass 
it an instance of a not yet defined class when calling it, or the 
compiler would have to somehow know that it had been defined with the 
extra parameter and add it.

Basically it all boils down to having a consistent set of rules. Ruby 
has one set of rules, but Python has a different set. Python's rules 
mean you can interchange functions and methods more easily [at a cost of 
having to write self out explicitly/with the advantage that you can 
easily see references to self](delete as preferred). There is no 
difference between:

class C:
   def method(self): pass

and

def foo(self): pass
class C: pass
C.method = foo

both of these result in effectively the same class (although the second 
one has a different name for the method in tracebacks).

That consistency really is important. Whenever I see a 'def' I know 
exactly what parameters the resulting function will take regardless of 
the context.

Another area to consider is what happens when I do:

    foo = FooClass()

    foo.bar(x)
# versus
    f = foo.bar
    f(x)

Both of these work in exactly the same way in Python: the self parameter 
is bound to the method when you access 'foo.bar', not when you make the 
call. That isn't the case in some other scripting languages. e.g. in 
Javascript the first one would call bar with the magic 'this' parameter 
set to foo, but in the second case it calls bar with 'this' set to the 
global object.

My point here is that in Python the magic is clearly defined and 
overridable (so we can have static or class methods that act 
differently).



From stefan.arentz at gmail.com  Fri Sep  7 10:21:09 2007
From: stefan.arentz at gmail.com (Stefan Arentz)
Date: 07 Sep 2007 16:21:09 +0200
Subject: Using s.sort([cmp[, key[,
	reverse]]]) to sort a list of objects based on a attribute
References: <1189173455.525144.326300@y42g2000hsy.googlegroups.com>
Message-ID: <87k5r2zhd6.fsf@kip.sateh.com>

cjt22 at bath.ac.uk writes:

> Hi there
> 
> I am fairly new to Python and have not really used regular expressions
> before (I think this might be needed for my query) and wondered if you
> could help
> 
> I have a step class and store in a list step instances
> A step instance contains variables: name, startTime etc and startTime
> is stored as a string %H:%M:%S
> 
> What I would like to do is to be able to sort this list of objects
> based on the startTime object so that the first item in the list is
> the object with the earliest Start time and last item is the object
> with the last Start time.
> 
> I belive my key has to be = strpTime(step.sTime, "%H:%M:%S")
> But don't know how to create the comparison funciton.
> 
> Any help on how I can perform this whole operation would be much
> appreciated.

Code:

  class Step(object):
      def __init__(self, time):
          self.time = time
      def __repr__(self):
          return "<Step time=%s>" % self.time

  steps = [Step("03:23:23"), Step("12:59:12"), Step("02:32:17")]
  print steps

  steps.sort(key = lambda s: s.time)
  print steps

Output:

  [<Step time=03:23:23>, <Step time=12:59:12>, <Step time=02:32:17>]
  [<Step time=02:32:17>, <Step time=03:23:23>, <Step time=12:59:12>]

If the default sort order of a Step is always it's time then you can
also define a __cmp__ method like this:

  class Step(object):
     def __cmp__(self, other):
        return cmp(self.time, other.time)

And simply do a steps.sort()

 S.


From imageguy1206 at gmail.com  Fri Sep  7 07:51:56 2007
From: imageguy1206 at gmail.com (imageguy)
Date: Fri, 07 Sep 2007 04:51:56 -0700
Subject: application version checking against database
Message-ID: <1189165916.268515.10360@d55g2000hsg.googlegroups.com>

We are trying to implement a system that checks the version of the
application against a version number stored in the database.  We don't
want the app and the db don't become out of sync.

We have tried setting a __version__ variable in the top most module,
however, it seems that this is not accessible for the modules that are
subsequently imported.  There are a several locations in the app where
we want to do the version check, but we would like to have one place
to set the version number, namely the top level module.

We have thought of creating a Version class and passing it around, but
aren't really keen on that idea.

Any suggestions/ideas would be helpful.


NOTE: the app is developed in wxPython.

g.



From Obey.civ at gmail.com  Fri Sep 14 23:42:42 2007
From: Obey.civ at gmail.com (Stephen)
Date: Sat, 15 Sep 2007 03:42:42 -0000
Subject: List append
In-Reply-To: <1189826727.204061.310380@d55g2000hsg.googlegroups.com>
References: <1189826727.204061.310380@d55g2000hsg.googlegroups.com>
Message-ID: <1189827762.011325.315840@r29g2000hsg.googlegroups.com>

In your code, "array" is a class attribute, so it is shared among all
instances. You need to use the __init__ method to define instance
(data) attributes instead:

def __init__(self):
    self.array = []

On Sep 14, 11:25 pm, mouseit <mouseit... at gmail.com> wrote:
> I'm trying to add an element to a list which is a property of an
> object, stored in an array. When I append to one element, all of the
> lists are appended!
>
> Example Code:
>
> class Test:
>     array = []
>
> myTests = [Test() , Test() , Test()]
> print len(myTests[1].array)
> myTests[0].array.append( 5 )
> print len(myTests[1].array)
>
> prints:
> 0
> 1
>
> This is probably a really easy question (I'm very new to python), so
> thanks in advance for your help!




From gagsl-py2 at yahoo.com.ar  Sun Sep 30 23:13:11 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 01 Oct 2007 00:13:11 -0300
Subject: Using fractions instead of floats
References: <1191202509.853059.222530@k79g2000hse.googlegroups.com>
	<1191206183.441075.167450@57g2000hsv.googlegroups.com>
Message-ID: <op.tzh0j9hfx6zn5v@gabriel2.softlabbsas.com.ar>

En Sun, 30 Sep 2007 23:36:23 -0300, George Sakkis  
<george.sakkis at gmail.com> escribi?:

> On Sep 30, 9:35 pm, andresj <andres.j.... at gmail.com> wrote:
>> I was doing some programming in Python, and the idea came to my mind:  
>> using fractions instead of floats when doing 2/5.
>> (...)
>> I would like to get some feedback on this idea. Has this been posted
>> before? If so, was it rejected? and for what?
>
> Is internet down today ?
>
> http://pypi.python.org/pypi/clnum/1.2
> http://www.python.org/dev/peps/pep-0239/

And gmpy: http://www.aleax.it/gmpy.html

-- 
Gabriel Genellina



From seanttierney at gmail.com  Sat Sep 22 10:57:37 2007
From: seanttierney at gmail.com (Sean Tierney)
Date: Sat, 22 Sep 2007 07:57:37 -0700
Subject: Zope review
In-Reply-To: <1190432460.360614.293400@n39g2000hsh.googlegroups.com>
References: <1190331847.514475.284200@22g2000hsm.googlegroups.com>
	<1190403772.862325.113960@y42g2000hsy.googlegroups.com>
	<mailman.901.1190415882.2658.python-list@python.org>
	<1190432460.360614.293400@n39g2000hsh.googlegroups.com>
Message-ID: <54e1e4bc0709220757r5609f19brabadc43f34ae90d8@mail.gmail.com>

>From Twisted's website "Twisted is a networking engine written in
Python, supporting numerous protocols. It contains a web server,
numerous chat clients, chat servers, mail servers, and more.

Given that Zope is also a written in python, supports numerous
protocols, contains a webserver, has several chat packages available,
a comparison/contrast would be quite useful.

I will try to amass some info and bring it back here by midweek.

Thanks,

Sean

On 9/21/07, Istvan Albert <istvan.albert at gmail.com> wrote:
> On Sep 21, 7:04 pm, "Sean Tierney" <seanttier... at gmail.com> wrote:
>
> > someone could contrast Zope w/ another Python framework like Twisted.
>
> > I've been investing some time in learning Zope/Plone and would love to
> > hear someone speak to alternatives.
>
> Twisted is a networking engine, Zope is a web application framework,
> Plone is a content management system, there is nothing to compare,
> these are different applications altogether, it is not like you'd
> replace one with the other
>
> For applications that can be compared see Zope vs Django vs Pylons vs
> web.py vs CherryPy. Google these and contrast away.
>
> i
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
Sean Tierney


From istvan.albert at gmail.com  Fri Sep 21 23:41:00 2007
From: istvan.albert at gmail.com (Istvan Albert)
Date: Sat, 22 Sep 2007 03:41:00 -0000
Subject: Zope review
In-Reply-To: <mailman.901.1190415882.2658.python-list@python.org>
References: <1190331847.514475.284200@22g2000hsm.googlegroups.com>
	<1190403772.862325.113960@y42g2000hsy.googlegroups.com>
	<mailman.901.1190415882.2658.python-list@python.org>
Message-ID: <1190432460.360614.293400@n39g2000hsh.googlegroups.com>

On Sep 21, 7:04 pm, "Sean Tierney" <seanttier... at gmail.com> wrote:

> someone could contrast Zope w/ another Python framework like Twisted.

> I've been investing some time in learning Zope/Plone and would love to
> hear someone speak to alternatives.

Twisted is a networking engine, Zope is a web application framework,
Plone is a content management system, there is nothing to compare,
these are different applications altogether, it is not like you'd
replace one with the other

For applications that can be compared see Zope vs Django vs Pylons vs
web.py vs CherryPy. Google these and contrast away.

i



From georgerxz at gmail.com  Sun Sep 16 04:52:45 2007
From: georgerxz at gmail.com (GeorgeRXZ)
Date: Sun, 16 Sep 2007 01:52:45 -0700
Subject: Free Python Ebook
Message-ID: <1189932765.100822.82720@r29g2000hsg.googlegroups.com>

Please tell me from which website I will get the free Python Ebook.

GEOrgE
http://zsoftwares.googlepages.com/index.htm



From hg at nospam.org  Thu Sep 27 23:56:53 2007
From: hg at nospam.org (hg)
Date: Fri, 28 Sep 2007 03:56:53 GMT
Subject: Guitars for 0$ !!!!!
References: <1190829152.350303.280950@o80g2000hse.googlegroups.com>
Message-ID: <9Y_Ki.1136$4V6.1049@newssvr14.news.prodigy.net>

 nutsbreaker2 at gmail.com wrote:

> http://free-guitars.blogspot.com/

And the chicks for free !


From Brad.Johnson at ballardtech.com  Fri Sep 28 17:31:32 2007
From: Brad.Johnson at ballardtech.com (Brad Johnson)
Date: Fri, 28 Sep 2007 21:31:32 +0000 (UTC)
Subject: Reentrancy of Python interpreter
Message-ID: <loom.20070928T212757-948@post.gmane.org>

I have embedded a single threaded instance of the Python interpreter in my
application.

I have a place where I execute a Python command that calls into C++ code which
then in turn calls back into Python using the same interpreter. I get a fatal
error which is "PyThreadStage_Get: no current thread."

I guess I understand why I can't have two invocations of the same interpreter
thread in one call stack, but how would I go about solving this?



From pyth0nc0d3r at gmail.com  Wed Sep  5 13:10:22 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Wed, 5 Sep 2007 11:10:22 -0600
Subject: Soemthing wrong w/ urllib module or something.
In-Reply-To: <eb79828c0709030630y6ddbf077j429e8003242bf0d5@mail.gmail.com>
References: <eb79828c0709021754h17c89a52ld36990c4e2a535c@mail.gmail.com>
	<46DBC5CB.3040007@timgolden.me.uk>
	<eb79828c0709030622q47caf860n58e69a6c888c8e4d@mail.gmail.com>
	<46DC0BA6.50606@timgolden.me.uk>
	<eb79828c0709030630y6ddbf077j429e8003242bf0d5@mail.gmail.com>
Message-ID: <eb79828c0709051010n52737c59v34244752fa91631e@mail.gmail.com>

Anyone got an answer for this?

On 9/3/07, Lamonte Harris <pyth0nc0d3r at gmail.com> wrote:
>
> Yeah I can browse it like normal.  For some reason though my News System
> that worked like a charm just stopped working also.  Is there any
> alternatives that I could try to use to POST to a PHP script?
>
> On 9/3/07, Tim Golden <mail at timgolden.me.uk> wrote:
> >
> > [Tim Golden]
> > >> To do the obvious, can you open a socket connection
> > >> to the domain you're using?
> > >>
> > >> <code>
> > >> from socket import socket
> > >> socket ().connect (("DOMAINHERE", 80))
> > >>
> > >> </code>
> > >>
> > >> or does it give you the same error?
> >
> > [Lamonte Harris]
> > > Yeah I basically got the same error.
> > >
> > > Traceback (most recent call last):
> > >   File "<stdin>", line 1, in <module>
> > >   File "<string>", line 1, in connect
> > > socket.error: (10053, 'Software caused connection abort')
> >
> > OK, then *something's* blocking access to that host (at least)
> > on port 80. Can you browse the web normally from this machine?
> > In particular, can you browse to that site ("DOMAINHERE")?
> >
> > TJG
> >
>
>
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From paul.hankin at gmail.com  Fri Sep 28 19:09:34 2007
From: paul.hankin at gmail.com (Paul Hankin)
Date: Fri, 28 Sep 2007 16:09:34 -0700
Subject: Bug with lists of pairs of lists and append()
In-Reply-To: <slrnffqvr6.uut.zach@zaphome.in.tu-clausthal.de>
References: <slrnffqvr6.uut.zach@zaphome.in.tu-clausthal.de>
Message-ID: <1191020974.172493.127040@w3g2000hsg.googlegroups.com>

On Sep 28, 11:25 pm, Gabriel Zachmann <z... at REMOVEME.in.tu-
clausthal.de> wrote:
> could some kind soul please explain to me why the following trivial code is
> misbehaving?
>
> lst = [ 0, 1, 2 ]
> s = []
> l = [ lst[0] ]
> r = lst[1:]
> while r:
>     x = (l,r)
>     print x
>     s.append( x )
>     l.append( r.pop(0) )
> print s

What TeroV said - you need to copy the lists into s otherwise they'll
still mutate when you pop or append to them.
Try putting an extra "print s" after the s.append(x) line, and you'll
find that s changes between there and the final print statement
outside the loop.

Here's code that works:
s, l, r = [], [0], [1, 2]
while r:
    x = (list(l), list(r))
    print x
    s.append(x)
    l.append(r.pop(0))
print s

I'm using list(l) to copy the list, Tero uses l[:], but the idea is
the same.

But do you just want all proper partitions of lst? Then this is much
simpler:
lst = [0, 1, 2]
s = [(lst[:i], lst[i:]) for i in range(1, len(lst))]

--
Paul Hankin



From mridula.ccpl at gmail.com  Fri Sep 21 01:59:52 2007
From: mridula.ccpl at gmail.com (Mridula Ramesh)
Date: Fri, 21 Sep 2007 11:29:52 +0530
Subject: global name is not defined - but this is actually a function's name
Message-ID: <33dffc910709202259h699c04a3w111f0fa23966a59d@mail.gmail.com>

hi.

i'm a beginner and i'm trying to get the hang of classes and functions. my
code looks like this:


<code>
class showRecord(main):
    def __init__(self):
        global gmax
        #now to create the screen by placing all the widgets
        rt = Tk()
        showbuttons()
        #call the scroller to DoSomething
        scroll()

    def showbuttons(self):
        # NAVIGATION BAR------
        NavBut1 = Button(rt, text="|<", width=6, height=2,
bg="DarkSeaGreen", fg="Black")
        NavBut1.grid(row=10, column=20, padx=6, pady=6, columnspan=3)
        NavBut2 = Button(rt, text="<<", width=6, height=2,
bg="DarkSeaGreen", fg="Black")
        NavBut2.grid(row=10, column=25, padx=6, pady=6, columnspan=3)
        #widget bindings
        NavBut2.bind('<Button-1>', lambda e:GoPrev(ctr))
</code>


my problem is at the 6th line: showbuttons()
the error says "global name "showbuttons" is not defined.... but it's not a
global variable. what am i doing wrong?

also, should i say ...

def showbuttons(self):
or
def showbuttons(self, showRecord):

thank you.
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From robertoedwins at gmail.com  Wed Sep  5 13:16:17 2007
From: robertoedwins at gmail.com (rieh25)
Date: Wed, 5 Sep 2007 10:16:17 -0700 (PDT)
Subject: Module for mod_python
Message-ID: <12506829.post@talk.nabble.com>


I've been thinking about a module (actually I have it partially implemented
in Zope), that would do the following things:

- Read the structure of a MySql database (fill a dictionary with it)

In order to:

- Quickly create detail/filter/update forms given a table name (without
specifying the fields because they have already been detected)
- Keep state of record selection. In order to implement Master-Detail form
processing, with unlimited levels of parent-child table relations, which
have also been detected already (foreign keys)
- Management of interrelation between security and menus (a user can only
access certain parts of the application)

I think that Ruby on Rails does something similar, but still I thing it
would be interesting to implement it in Python. What do you think?
-- 
View this message in context: http://www.nabble.com/Module-for-mod_python-tf4386823.html#a12506829
Sent from the Python - python-list mailing list archive at Nabble.com.



From michele.simionato at gmail.com  Thu Sep 20 00:30:07 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Thu, 20 Sep 2007 04:30:07 -0000
Subject: Mixin classes and single/multiple inheritance
In-Reply-To: <87y7f2uhpp.fsf@benfinney.id.au>
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au>
	<46f0fba0$0$29605$426a34cc@news.free.fr>
	<1190199134.791808.267110@22g2000hsm.googlegroups.com>
	<mailman.778.1190225664.2658.python-list@python.org>
	<1190256493.827576.139470@r29g2000hsg.googlegroups.com>
	<877immvye0.fsf_-_@benfinney.id.au>
	<1190257864.945639.199230@k79g2000hse.googlegroups.com>
	<87y7f2uhpp.fsf@benfinney.id.au>
Message-ID: <1190262607.684957.49610@57g2000hsv.googlegroups.com>

On Sep 20, 5:41 am, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> Okay. How do we use the language we have to achieve what mixin classes
> achieve in Ruby? Can you give an code example that you *would*
> recommend for someone looking to do what mixin classes do?

Since the language we have does have multiple inheritance, let's
use it to implement mixins. My point was that even if Python had
been implemented without multiple inheritance, it would have
been simple to implement mixins, or by copying the methods,
or by dispatching with __getattr__. So, multiple inheritance
is giving us very little for the point of view of mixins; OTOH,
multiple inheritance is giving us a lot of headaches for
what concerns cooperative methods.

    Michele Simionato



From http  Tue Sep  4 01:39:52 2007
From: http (Paul Rubin)
Date: 03 Sep 2007 22:39:52 -0700
Subject: So what exactly is a complex number?
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
	<mailman.4.1188866709.21370.python-list@python.org>
	<roy-3C221C.22043603092007@news.panix.com>
	<mailman.8.1188882659.2658.python-list@python.org>
Message-ID: <7xk5r7dm53.fsf@ruckus.brouhaha.com>

Steve Holden <steve at holdenweb.com> writes:
> but the reals aren't. Clearly you *can* take the square root of all
> real numbers, since a real number *is* also a complex number with a
> zero imaginary component. They are mathematically equal and equivalent.

Ehhh, I let it slide before but since the above has been said a few
times I thought I better mention that it's mathematically a bit bogus.
We could say there is an embedding of the real numbers in the complex
numbers (i.e. the set of complex numbers with Im z = 0).  But the
usual mathematical definition of the reals (as a set in set theory) is
a different set from the complex numbers, not a subset.  Also, for
example, the derivative of a complex valued function means something
considerably stronger than the derivative of a real valued function.
The real valued function

  f(x) = { exp(-1/x**2, if x != 0,
         { 0, if x = 0

for real x is infinitely differentiable at x=0 and all the derivatives
are 0, which makes it sound like there's a Taylor series that
converges to 0 everywhere in some neighborhood of x=0, which is
obviously wrong since the function itself is nonzero when x!=0.  The
discrepancy is because viewed as a complex valued function f(z), f is
not differentiable at z=0 even once.

It's pretty normal for a real function f to have a first derivative at
x, but no second derivative at x.  That can't happen with complex
functions.  If f'(z) exists for some z, then f is analytic at z which
means that all of f's derivatives exist at z and there is some
neighborhood of z in which the Taylor series centered at z converges.


From nagle at animats.com  Sat Sep 29 19:20:46 2007
From: nagle at animats.com (John Nagle)
Date: Sat, 29 Sep 2007 23:20:46 GMT
Subject: What's the current status of socket timeouts?
Message-ID: <i5BLi.30064$eY.8254@newssvr13.news.prodigy.net>

   What actually works and what doesn't in socket timeouts in
Python 2.5?  What breaks with timeouts turned on?  There are lots
of patches and bug reports, but no coherent summary.

				John Nagle



From tim.couper at scivisum.co.uk  Tue Sep 11 08:08:25 2007
From: tim.couper at scivisum.co.uk (Tim Couper)
Date: Tue, 11 Sep 2007 13:08:25 +0100
Subject: IOError - list of all Errno numbers and their meanings?
Message-ID: <46E68539.1020404@scivisum.co.uk>

As you know, when an IOError is raised, you get a helpful:

[Errno N] <useful descriptor of the error>

Is there a list of all possible values of N which can be returned, and 
their meanings?

-- 
Dr Tim Couper
CTO, SciVisum Ltd

www.scivisum.com



From steve at REMOVE-THIS-cybersource.com.au  Sun Sep 23 09:52:17 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sun, 23 Sep 2007 13:52:17 -0000
Subject: newb: Question regarding custom exception
References: <1190550748.698865.210740@22g2000hsm.googlegroups.com>
Message-ID: <13fcrshn28pot7c@corp.supernews.com>

On Sun, 23 Sep 2007 05:32:28 -0700, crybaby wrote:

> Why you specify type and name of the exception in your custom
> exceptions,
> but not in built in exceptions
>     except IOError:
>         print "no file by the name ccy_rates*.txt"
> 
>     except MyError, e:
>                 print e.msg

You can say:

except IOError, e:
    print e.msg


And you can say:

except MyError:
    print "whatever I want"


It all depends on what you want to do.


 
> Also, when you do:
> 
> try: raise MyError(23)
> 
> In "try: MyError(23) ", you are calling MyError class, but actually get
> instantiated in except MyError, e: ?

I don't understand what you are actually asking, but I will try my best.


raise MyError(23)

calls the class MyError and creates and instance, and that instance is 
then used as an argument to the raise statement. You can also do this:

instance = MyError(23)
raise instance    

You don't need the try block unless you want to catch the exception. The 
exception itself it actually raised by the "raise" statement, not the 
"except" statement. The "except" statement _catches_ the exception.

Try typing these lines in the interactive interpreter:



try:
    print "before the exception"
    raise Exception("an error occurred")
    print "this line is never executed"
    print "neither is this"
except Exception, e:
    print "the exception is:"
    print e
    print e.message





Hope this helps.



-- 
Steven.


From robertoedwins at gmail.com  Wed Sep  5 19:32:50 2007
From: robertoedwins at gmail.com (rieh25)
Date: Wed, 5 Sep 2007 16:32:50 -0700 (PDT)
Subject: Module for mod_python
In-Reply-To: <12506829.post@talk.nabble.com>
References: <12506829.post@talk.nabble.com>
Message-ID: <12513012.post@talk.nabble.com>


Is it such a bad idea that it doesn't deserve a reply?


rieh25 wrote:
> 
> I've been thinking about a module (actually I have it partially
> implemented in Zope), that would do the following things:
> 
> - Read the structure of a MySql database (fill a dictionary with it)
> 
> In order to:
> 
> - Quickly create detail/filter/update forms given a table name (without
> specifying the fields because they have already been detected)
> - Keep state of record selection. In order to implement Master-Detail form
> processing, with unlimited levels of parent-child table relations, which
> have also been detected already (foreign keys)
> - Management of interrelation between security and menus (a user can only
> access certain parts of the application)
> 
> I think that Ruby on Rails does something similar, but still I thing it
> would be interesting to implement it in Python. What do you think?
> 

-- 
View this message in context: http://www.nabble.com/Module-for-mod_python-tf4386823.html#a12513012
Sent from the Python - python-list mailing list archive at Nabble.com.



From bj_666 at gmx.net  Sat Sep 15 08:42:49 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 15 Sep 2007 12:42:49 GMT
Subject: how to join array of integers?
References: <1189859762.563599.269270@g4g2000hsf.googlegroups.com>
Message-ID: <5l22a9F5v20uU1@mid.uni-berlin.de>

On Sat, 15 Sep 2007 12:36:02 +0000, Summercool wrote:

> i think in Ruby, if you have an array (or list) of integers
> 
> foo = [1, 2, 3]
> 
> you can use foo.join(",") to join them into a string "1,2,3"
> 
> in Python... is the method to use  ",".join() ?  but then it must take
> a list of strings... not integers...
> 
> any fast method?

Convert them to strings before joining:

In [145]: foo = [1, 2, 3]

In [146]: ','.join(map(str, foo))
Out[146]: '1,2,3'

Ciao,
	Marc 'BlackJack' Rintsch


From knipknap at gmail.com  Thu Sep  6 07:47:49 2007
From: knipknap at gmail.com (Samuel)
Date: Thu, 06 Sep 2007 04:47:49 -0700
Subject: ImportError depending on the calling module
Message-ID: <1189079269.279716.254560@50g2000hsm.googlegroups.com>

Hi,

Given the following directory structure:

---------
|-- Obj.py
|-- __init__.py
|-- foo
|   |-- FooTest.py
|   `-- __init__.py
`-- start1.py
---------

With the following content:

---------
$ cat Obj.py
class Obj(object):
    pass

$ cat __init__.py
import Obj
__all__ = ['Obj']

$ cat foo/FooTest.py
from Obj import Obj

class FooTest(object):
    pass

$ cat foo/__init__.py
from FooTest import FooTest
__all__ = ['FooTest']

$ cat start1.py
from foo import FooTest
x = FooTest()
print "Works!"
sab at pcf2245:~/test$
---------

The test works:

---------
$ python start1.py
Works!
$
---------

However, if the module is imported elsewhere, e.g. in the following
directory structure:

---------
test
|-- Obj.py
|-- __init__.py
|-- foo
|   |-- FooTest.py
|   `-- __init__.py
`-- start1.py
test2
`-- start2.py
---------

Where start2.py has the following content:

---------
$ cd test2
$ cat start2.py
import sys, os.path
sys.path.insert(0,
os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))
import test
import test.foo
print 'Works!'
---------

It does not work:

---------
$ python start2.py
Traceback (most recent call last):
  File "start2.py", line 4, in <module>
    import test.foo
  File "/home/sab/test/foo/__init__.py", line 1, in <module>
    from FooTest import FooTest
  File "/home/sab/test/foo/FooTest.py", line 1, in <module>
    from Obj import Obj
ImportError: No module named Obj
---------

How would you import the foo module correctly?

-Samuel



From puredata at 11h11.com  Tue Sep 25 14:44:14 2007
From: puredata at 11h11.com (patrick)
Date: Tue, 25 Sep 2007 14:44:14 -0400
Subject: jack audio connection kit
Message-ID: <46F956FE.3090803@11h11.com>

hello everyone,

is there a way to make python output audio in jack:
http://jackaudio.org/

jack is the best audio solution for linux, mac and lately windows. i 
found 1 project called pyjack, but the author remove the software from 
his website.

that would be neat!
pat






From miki.tebeka at gmail.com  Sun Sep  9 01:57:59 2007
From: miki.tebeka at gmail.com (Miki)
Date: Sun, 09 Sep 2007 05:57:59 -0000
Subject: Spell-checking Python source code
In-Reply-To: <uk5r0wpi6.fsf@yahoo.com>
References: <1189285495.185657.88010@o80g2000hse.googlegroups.com>
	<uk5r0wpi6.fsf@yahoo.com>
Message-ID: <1189317479.924231.210490@y42g2000hsy.googlegroups.com>

>> In an ideal world, my IDE would do this with a red wavy line.
>
> You didn't mention which IDE you use; however, if you use Emacs, there
> is flyspell-prog-mode which does that for you (checks your spelling
> "on the fly", but only within comments and strings).
Same in Vim (:set spell)

HTH,
--
Miki <miki.tebeka at gmail.com>
http://pythonwise.blogspot.com



From brenNOSPAMbarn at NObrenSPAMbarn.net  Tue Sep  4 13:53:06 2007
From: brenNOSPAMbarn at NObrenSPAMbarn.net (OKB (not okblacke))
Date: Tue, 04 Sep 2007 17:53:06 GMT
Subject: Python is overtaking Perl
References: <1188865943.238573.218750@w3g2000hsg.googlegroups.com>
	<mailman.22.1188909362.2658.python-list@python.org>
	<1188925214.716404.219920@22g2000hsm.googlegroups.com>
Message-ID: <Xns99A16EB3640BAOKB@199.45.49.11>

George Sakkis wrote:

> On Sep 4, 8:35 am, Jean-Paul Calderone <exar... at divmod.com> wrote:
>> On Tue, 04 Sep 2007 00:32:23 -0000, Ben <benyan... at gmail.com>
>> wrote: 
>> >Here are the statistics from Google Trends:
>>
>> >http://benyang22a.blogspot.com/2007/09/perl-vs-python.html
>>
>> >From the graph, it seems more accurate to say that Perl is
>> >undertaking Python. 
>>
>> Jean-Paul
> 
> And to make it even more accurate, "Perl is undertaking Python in
> India", since that's where the difference in favor of Python comes
> from.

    	No, it's the other way around.  The big difference in India is in 
favor of Perl.

-- 
--OKB (not okblacke)
Brendan Barnwell
"Do not follow where the path may lead.  Go, instead, where there is
no path, and leave a trail."
	--author unknown


From bear at bears.org  Thu Sep 20 16:48:16 2007
From: bear at bears.org (Gary Coulbourne)
Date: Thu, 20 Sep 2007 16:48:16 -0400
Subject: An Editor that Skips to the End of a Def
In-Reply-To: <87odfxjgjy.fsf@pobox.com>
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87odfxjgjy.fsf@pobox.com>
Message-ID: <m0BIi.16$Dy4.1@fe099.usenetserver.com>

John J. Lee wrote:
> Eclipse must be able to do this.

Not by default... but I am certain there are plugins that provide python
integration.  (And jython integration)

Peace,
Gary


From see.signature at no.spam  Wed Sep  5 06:42:28 2007
From: see.signature at no.spam (Eric Brunel)
Date: Wed, 05 Sep 2007 12:42:28 +0200
Subject: Multi Heritage with slots
References: <1188982916.071976.160170@g4g2000hsf.googlegroups.com>
Message-ID: <op.tx6f02mvwepdt4@ericb.pragmadev>

On Wed, 05 Sep 2007 11:01:56 +0200, Alexandre Badez  
<alexandre.badez at gmail.com> wrote:

> Hye,
>
> I'm developing a little app, and I want to make multi heritage.
> My problem is that my both parent do have __slots__ define.
>
> So I've got something like:
>
> class foo(object):
>     __slots__ = ['a', 'b']
>     pass
>
> class foo2(object):
>     __slots__ = ['c', 'd']
>     pass
>
> class crash(foo, foo2):
>     pass
>
> If you write only that in a sample file or in python console (as I
> did), python refuse to load the module and report something like:
>
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> TypeError: Error when calling the metaclass bases
>     multiple bases have instance lay-out conflict
>
> Do you know why it append? And how could I make this work?

See http://mail.python.org/pipermail/python-list/2006-December/418768.html

Basically, the general advice you're likely to get here is: don't use  
__slots__, or at least don't use __slots__ with inheritance.

BTW, what are you trying to do? Is it really a memory footprint  
optimization, which is the intended use case for __slots__, or are you  
just doing Java in Python?
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From gagsl-py2 at yahoo.com.ar  Thu Sep  6 12:44:16 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 06 Sep 2007 09:44:16 -0700
Subject: ImportError depending on the calling module
In-Reply-To: <1189095236.413270.288090@50g2000hsm.googlegroups.com>
References: <1189079269.279716.254560@50g2000hsm.googlegroups.com>
	<1189093482.137051.73770@r29g2000hsg.googlegroups.com>
	<1189095236.413270.288090@50g2000hsm.googlegroups.com>
Message-ID: <1189097056.295186.62020@r29g2000hsg.googlegroups.com>

On 6 sep, 13:13, Samuel <knipk... at gmail.com> wrote:
> On Sep 6, 5:44 pm, Gabriel Genellina <gagsl-... at yahoo.com.ar> wrote:

> > They should import the package as any other
> > client code, without doing any import tricks nor playing with
> > sys.path.
>
> Why does it matter whether I install it in sys.path or whether
> sys.path is modified? What's the difference?

Because it's more simple, less error prone, easier to test, more
efficient...

> What I am doing is I ship two modules in one tarball with my software.
> The software is only unpacked and ran. It has to work without
> installation.

That's fine, and a good requirement. Place start2.py inside the
container directory, and your package beneath it. Then you don't have
to modify sys.path to find the package - "import packagename" just
works. And it still works if the user installs the package (into site-
packages, by example).

 start1.py
 start2.py
 packagename/
 |-- Obj.py
 |-- __init__.py
 |-- foo/
     |-- FooTest.py
     `-- __init__.py

Packages are... well, packages, boxes. Don't try to import a module
inside a package as it were a standalone module - relative imports
won't work then.
This was discussed some time ago <http://groups.google.com.ar/group/
comp.lang.python/msg/b2d0c36e388e9ab6>

--
Gabriel Genellina



From steve at holdenweb.com  Tue Sep 11 08:46:18 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 11 Sep 2007 08:46:18 -0400
Subject: Checking if elements are empty
In-Reply-To: <588D53831C701746A2DF46E365C018CE01D2CB39@LITEXETSP001.etrsouth.corp.entergy.com>
References: <fc468r$fd4$1@sea.gmane.org>
	<588D53831C701746A2DF46E365C018CE01D2CB39@LITEXETSP001.etrsouth.corp.entergy.com>
Message-ID: <fc62mp$dhr$1@sea.gmane.org>

Hamilton, William wrote:
>> From: Steve Holden
>> Neil Cerutti wrote:
>>> On 2007-09-10, Chris Mellon <arkanes at gmail.com> wrote:
>>>> On 9/10/07, Neil Cerutti <horpner at yahoo.com> wrote:
>>>>> Agreed; but I prefer 'if y[0] == ""', absent more context and
>>>>> better names.
>>>> Probably should use u"" if you're going to take that route, as
>>>> this will fail spuriously if y[0] contains a unicode string
>>>> that can't be implicitly converted to ascii. Personally, I
>>>> prefer the boolean check and I'll let operations fail elsewhere
>>>> if there's a type mismatch.
>>> I have a quibble not with the functionality of the boolean check,
>>> but with its expressiveness. if y[0] == "" expresses more, i.e.,
>>> that I expect y[0] to contain a Python byte string.
>>>
>> I have a quibble with a test that will raise an exception when the
>> anticipated condition is true. Your test is patently absurd, as you
>> would have discovered had you bothered to try it:
>>
>>  >>> y = ""
>>  >>> if y[0] == "":
>> ...   print "True"
>> ... else:
>> ...   print "False"
>> ...
>> Traceback (most recent call last):
>>    File "<stdin>", line 1, in <module>
>> IndexError: string index out of range
>>  >>>
>>
>> Further, when the string is *not* the null string the test will always
>> return False, as you will be comparing two strings of unequal length.
>>
>> So, absent a solution that works, len(y) == 0 looks pretty good.
> 
> 
> Going back to the OP, the problem is taking a string such as
>>>> x = '  \t"ff'
> then splitting that string like this
>>>> y = x.split('\t')
> 
> The question is, does the first element of the list y contain an empty
> string or not?  In this case, the logic in the following conditional is
> perfectly valid.
>>>> if y[0] == "":
> ...    print "True"
> ... else
> ...    print "False"
> 
> (len(y[0]) == 0) would also work, and is the solution you originally
> gave the OP.  
> 
Aah, list of strings, right. Thanks.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From deets at nospam.web.de  Sat Sep 15 10:56:31 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 15 Sep 2007 16:56:31 +0200
Subject: python 2.5 cElementTree entity troubles
In-Reply-To: <46EBEEFF.80106@web.de>
References: <5l22jsF5taqoU1@mid.uni-berlin.de> <46EBEEFF.80106@web.de>
Message-ID: <5l2a5kF60ti9U1@mid.uni-berlin.de>

Stefan Behnel schrieb:
> Diez B. Roggisch wrote:
>> Any suggestions on how to teach the built-in ET-parser entities?
> 
> As you already do it in your code.
> 
> http://effbot.org/elementtree/elementtree-xmlparser.htm#tag-ET.XMLParser.entity
> 
> But I guess your version of cET is just too old.

Unfortunately, it's the python 2.5-build-in one.. :(

Diez


From mal at egenix.com  Fri Sep 21 09:20:00 2007
From: mal at egenix.com (M.-A. Lemburg)
Date: Fri, 21 Sep 2007 14:20:00 +0100
Subject: looking for ocbc example
In-Reply-To: <LPGdnThcsrJMgG7bnZ2dnUVZ_uGknZ2d@comcast.com>
References: <LPGdnThcsrJMgG7bnZ2dnUVZ_uGknZ2d@comcast.com>
Message-ID: <46F3C500.7070901@egenix.com>

Carl K wrote:
> I am sure this is what I want:
> http://www.python.org/topics/database/docs.html
> "The documentation for the PythonWin ODBC module."
> 
> but it is 404.
> 
> google isn't being nice.
> 
> Anyone know where I can find some simple examples?
> 
> I have used odbc in other environments, so just need to know what modules, and 
> the lines to connect and execute a sql command.

Here's a very simple example for mxODBC:

# mxODBC is available from http://www.egenix.com/products/python/mxODBC/:

# On Windows:
from mx.ODBC import Windows as Database

# On Mac OS X:
from mx.ODBC import iODBC as Database

# On Linux/BSD/etc.:
from mx.ODBC import unixODBC as Database
# or
from mx.ODBC import iODBC as Database

# Open a connection to the database
connection = Database.DriverConnect('DSN=<datasourcename>;'
                                    'UID=<username>;'
                                    'PWD=<password>;'
                                    'KEYWORD=<value>')
# replace the values accordingly, add new keyword-value pairs as
# necessary for your data source; data sources are configured
# in the ODBC manager

# Create a cursor; this is used to execute commands
cursor = connection.cursor()

# Create a table
cursor.execute('CREATE TABLE mxodbcexample1 '
               ' (id integer, name varchar(10), data varchar(254))')
# this command does not create a result set, so there's nothing
# to fetch from the database; however in order to make the
# change permanent, we need to commit the change
connection.commit()

# Prepare some data rows to add to the table, ie. a list of tuples
rows = []
for i in range(42):
    name = 'name-%i' % i
    data = 'value-%i' % i
    rows.append((i, name, data))

# Add the data in one go; the values from the tuples get assigned
# to the ?-mark parameter markers in the SQL statement based on
# their position and the SQL statement is executed once for
# each tuple in the list of rows
cursor.executemany('INSERT INTO mxodbcexample1 VALUES (?,?,?)',
                   rows)

# If you apply changes to the database, be sure to commit or
# rollback your changes; a call to .commit() or .rollback()
# will implicitly start a new transaction
connection.commit()

# Now fetch some data rows
from_id = 40
to_id = 42
cursor.execute('SELECT * FROM mxodbcexample1'
               ' WHERE (id >= ?) and (id < ?)',
               (from_id, to_id))

# Fetch the results
for i, row in enumerate(cursor.fetchall()):
    print 'Row %i: %r' % (i, row)

# Remove the table again
cursor.execute('DROP TABLE mxodbcexample1')
connection.commit()

# Close the connection
connection.close()


With MS Access this gives:

Row 0: (40, 'name-40', 'value-40')
Row 1: (41, 'name-41', 'value-41')

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Software directly from the Source
>>> Python/Zope Consulting and Support ...        http://www.egenix.com/
>>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
>>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

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


From f.guerrieri at gmail.com  Wed Sep  5 13:43:16 2007
From: f.guerrieri at gmail.com (Francesco Guerrieri)
Date: Wed, 5 Sep 2007 19:43:16 +0200
Subject: PythonAlley.com
In-Reply-To: <1189012363.397845.174960@y42g2000hsy.googlegroups.com>
References: <mailman.92.1189002436.2658.python-list@python.org>
	<1189012363.397845.174960@y42g2000hsy.googlegroups.com>
Message-ID: <79b79e730709051043j4ab048ebsde172278835c8a06@mail.gmail.com>

On 9/5/07, dkeeney <dvkeeney at gmail.com> wrote:
>
>
> The Python community would benefit from a moderated web-forum along
> the lines of
> perlmonks.org.
>
> The Python community online now seems to have two major segments, the
> c.l.p newsgroup (here),
> and a large selection of blogs.  C.l.p is unmoderated and often
> hostile.  The bloggers
>

Actually c.l.py is one of the least hostile place (and more helpful for the
newcomers, like myself) I ever met on the net. I will concede that I've only
been online since twelve years so in the good ol' times surely there were
many more place better than this one.


francesco
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From see.signature at no.spam  Tue Sep  4 05:31:06 2007
From: see.signature at no.spam (Eric Brunel)
Date: Tue, 04 Sep 2007 11:31:06 +0200
Subject: Tkinter
References: <1188882720.020666.67490@k79g2000hse.googlegroups.com>
Message-ID: <op.tx4h14tdwepdt4@ericb.pragmadev>

On Tue, 04 Sep 2007 07:12:00 +0200, vijayca <vijayeee at gmail.com> wrote:

> i tried to use python gui module Tkinter in solaris,aix,hpux.....
> while importing the module it  shows an error...
>
> import Tkinter
> error says that your python may not be configured for Tk()...
> how to get out of this...

Did you compile the Python interpreter yourself, or did it come in a sort  
of package?

In the first case, you have to install tcl/tk yourself if it's not already  
there, then tweak the build options for Python to make it use the tcl/tk  
installation you've done. How to tweak these options depends on the Python  
version you use, so please tell us what it is.

In the second case, Tkinter may be provided as a separate package, that  
you also need to install.

And BTW, Wildemar's comment still holds: please copy/paste the exact  
traceback you get if it doesn't work. I'm only guessing here...

HTH
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From deets at nospam.web.de  Tue Sep 18 07:07:36 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 18 Sep 2007 13:07:36 +0200
Subject: Looking for web software in Python.
References: <mailman.691.1190080412.2658.python-list@python.org>
Message-ID: <5l9proF75mf3U1@mid.uni-berlin.de>

Kevin Ar18 wrote:

> 
> Are any of the following pieces of web software available in Python (under
> a non-copyleft license like BSD or MIT or Python license)?
> 
> 
> Mailing list - with web accessable archive and list maintenance.
> Source control
> Wiki System

For the last two, look at TRAC. But I'm not sure about the license - check
that out for yourself.

Diiez


From steven.bethard at gmail.com  Wed Sep 12 14:46:06 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 12 Sep 2007 12:46:06 -0600
Subject: pwdmodule.c
In-Reply-To: <1189622437.459458.129390@57g2000hsv.googlegroups.com>
References: <1189622437.459458.129390@57g2000hsv.googlegroups.com>
Message-ID: <KJ-dndPgqrVzrnXbnZ2dnUVZ_uDinZ2d@comcast.com>

hvendelbo.dev at googlemail.com wrote:
> I am trying to compile Python with cmake, but perhaps there are a few
> dependencies that have not been corrected for Windows compilation.

I don't know the specific answers to your questions, but I wanted to 
point out, in case you didn't already know, that Alexander Neundorf 
successfully compiled Python with CMake and posted the necessary files:

http://mail.python.org/pipermail/python-dev/2007-July/073912.html

STeVe


From modiinfo at gmail.com  Mon Sep 10 08:25:46 2007
From: modiinfo at gmail.com (Harshad Modi)
Date: Mon, 10 Sep 2007 12:25:46 -0000
Subject: encoding latin1 to utf-8
Message-ID: <1189427146.723304.270600@22g2000hsm.googlegroups.com>

hello ,
 I make one function for encoding latin1 to utf-8. but i think it is
not work proper.
plz guide me.

it is not get proper result . such that i got "Belgi???" using this
method, (Belgium)  :

import codecs
import sys
# Encoding / decoding functions
def encode(filename):
 file = codecs.open(filename, encoding="latin-1")
 data = file.read()
 file = codecs.open(filename,"wb", encoding="utf-8")
 file.write(data)

file_name=sys.argv[1]
encode(file_name)



From gagsl-py2 at yahoo.com.ar  Fri Sep 14 02:59:31 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 14 Sep 2007 03:59:31 -0300
Subject: Spaces from string specifier
References: <03a601c7f68b$ccdf1ed0$669d5c70$@com>
Message-ID: <op.tymtphaqx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 14 Sep 2007 01:57:43 -0300, Gavin Tomlins <gavin at madzag.com>  
escribi?:

> I'm trying to work out when using a format specifier I get spaces in the
> resulting string.  Eg. Looking at the outputted string you can see that
> there are spaces after T5LAT, F4LAT etc. as I result from trying to keep  
> the
> code aligned

- You should *not* build the SQL text yourself; use a parametrised query  
instead. It's not only easier to write; it's safer, less error prone, and  
maybe faster. See this previous post  
<http://groups.google.com/group/comp.lang.python/browse_thread/thread/b8c1ef8471f55995/>

- Spaces are not significant in SQL, but you may have your own reasons to  
format the SQL text in a certain way. In addition to the ideas already  
menctioned on that thread (avoid \, use parenthesis, and auto-concatenate  
adjacent strings), you may use a triple-quoted string + function dedent  
 from textwrap module:

py> fmtSqlP300Amp = textwrap.dedent('''\
...           UPDATE Patient SET
...             O2AMP = "%s", O1AMP = "%s", OzAMP = "%s", PzAMP = "%s",
...             P4AMP = "%s", CP4AMP = "%s", T6AMP = "%s", C4AMP = "%s",
...             TP8AMP = "%s", T4AMP = "%s", T5AMP = "%s", P3AMP = "%s"
...           WHERE Pat_Id = "%s"''')
py> print fmtSqlP300Amp
UPDATE Patient SET
   O2AMP = "%s", O1AMP = "%s", OzAMP = "%s", PzAMP = "%s",
   P4AMP = "%s", CP4AMP = "%s", T6AMP = "%s", C4AMP = "%s",
   TP8AMP = "%s", T4AMP = "%s", T5AMP = "%s", P3AMP = "%s"
WHERE Pat_Id = "%s"

I hope any of these ideas will fit your own needs.

-- 
Gabriel Genellina



From sjmachin at lexicon.net  Tue Sep 18 18:31:05 2007
From: sjmachin at lexicon.net (John Machin)
Date: Tue, 18 Sep 2007 15:31:05 -0700
Subject: Parsing problems: A journey from a text file to a directory tree
In-Reply-To: <Michael.J.Fromberger-550C9C.14515118092007@localhost>
References: <1189958074.670245.17910@n39g2000hsh.googlegroups.com>
	<Michael.J.Fromberger-550C9C.14515118092007@localhost>
Message-ID: <1190154665.944722.137750@q3g2000prf.googlegroups.com>

On Sep 19, 4:51 am, "Michael J. Fromberger"
<Michael.J.Fromber... at Clothing.Dartmouth.EDU> wrote:
> .
> .    # This expression matches "header" lines, defining a new section.
> .    new_re  = re.compile(r'\[([\w ]+)\]\s*$')

Directory names can contain more different characters than those which
match [\w ] ... and which ones depends on the OS; might as well just
allow anything, and leave it to the OS to complain. Also consider
using line.rstrip() (usually a handy precaution on ANY input text
file) instead of having \s*$ at the end of your regex.

> .
> .            while new_level < len(state):
> .                state.pop()

Hmmm ... consider rewriting that as the slightly less obfuscatory

    while len(state) > new_level:
        state.pop()

If you really want to make the reader slow down and think, try this:

    del state[new_level:]

A warning message if there are too many "-" characters might be a good
idea:

[foo]
|-bar
|-zot
|---plugh

> .
> .            state[-1][key] = {}
> .            state.append(state[-1][key])
> .

And if the input line matches neither regex?

> .    return out
>
> To call this, pass a file-like object to parse_folders(), e.g.:
>
> test1 = '''
> [New client].

Won't work with the dot on the end.

> Michael J. Fromberger             | Lecturer, Dept. of Computer Science




From grante at visi.com  Sat Sep  1 20:12:52 2007
From: grante at visi.com (Grant Edwards)
Date: Sun, 02 Sep 2007 00:12:52 -0000
Subject: Looking for Delaunay triangulation module...
References: <13dge9m2339ka68@corp.supernews.com> <fbag9e$gnm$3@lust.ihug.co.nz>
	<13dhqbm42tr1i7b@corp.supernews.com>
	<1188686186.415022.293900@19g2000hsx.googlegroups.com>
Message-ID: <13dk004g643p346@corp.supernews.com>

On 2007-09-01, drobinow at gmail.com <drobinow at gmail.com> wrote:

>>>> So for lack of a delaunay module, I'm stuck trying to port my
>>>> application to Win32.
>>
>>> Why not run it under Cygwin? :)
>>
>> I'm hoping there is an easier way than trying to build a
>> half-dozen large Python extensions (and their supporting
>> libraries) under Cygwin.
>
> Well, that's what Cygwin is for -- to make it easy to do that.

I know that's its intent.  In my experience it doesn't succeed
very well. I've spent years supporting a set of development
tools under both Cygwin and Linux.  The Cygwin versions are a
continuous pain for everybody involved.

> What's not working?

I have never tried to run my application under Cygwin.

AFAICT, many of the Python packages I use aren't available as
packages for Cygwin, and I don't really want to spend the time
trying to build and maintain them.

My experiences building things from source in Cygwin haven't
been good in the past, and I have zero experience bundling up
Cygwin-hosted applications for delivery.

I have used an application suite under Windows that comprised
Cygwin apps and a bundled Cygwin installation, and it was a
total distaster.  Perhaps that was just a singularly bad
example, but it sure made it seem like using Cygwin as a
platform for delivering Windows applications was a bad idea.

> I'm also not clear what your problem is with Delny with qhull
> under Windows.

I wasn't able to find a copy of Delny and qhull library for
Windows.  I did find postings asking where one could be found.
Those postings went unanswered.

> What errors have you gotten?
>
> All the tests pass for me.

-- 
Grant Edwards                   grante             Yow!  Alright,
                                  at               you!! Imitate a WOUNDED
                               visi.com            SEAL pleading for a PARKING
                                                   SPACE!!


From obazzzz2007 at gmail.com  Tue Sep 18 17:55:35 2007
From: obazzzz2007 at gmail.com (blade)
Date: Tue, 18 Sep 2007 14:55:35 -0700
Subject: buy any tthing from the web free without creditcards.. true .. simple
	.. legal
Message-ID: <1190152535.926647.253810@y42g2000hsy.googlegroups.com>



first : click on this link and make a new account

http://www.AWSurveys.com/HomeMain.cfm?RefID=alshab

write some very short reviews on soms very few sites -= earn your
money

keep earning money till the amount u need for a certain thing u want
to buy

creat a new free account on paypal.com

transfer your money from the first site to paypal.com

use your money



From robert.kern at gmail.com  Tue Sep  4 00:24:42 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 03 Sep 2007 23:24:42 -0500
Subject: Applying transformation matrix to 3D vertex coordinates
In-Reply-To: <5rjod3lih4mnupjcm2184k5no15eodlc8r@4ax.com>
References: <5rjod3lih4mnupjcm2184k5no15eodlc8r@4ax.com>
Message-ID: <fbimmh$hm5$1@sea.gmane.org>

PhilC wrote:
> '''
> ################################################
> Task:-
> to apply a translation array to an array
> of 3D vertex coordinates to produce the
> resulting location of each vertices.
> 
> Translation array and vertex coordinates taken from
> a Truespace COB file.
> 
> The text in the COB file looks like this:-
> 
> Transform
> -2.11786 -0.817596 0.946387 0.864939
> 0.405189 1.25484 2.11894 0.434915
> -1.16679 1.9198 -0.981965 1.13894
> 0 0 0 1
> World Vertices 8
> -0.200000 -0.029486 -0.236313
> 0.200000 0.029486 -0.163687
> -0.200000 0.370514 -0.282911
> -0.200000 0.370514 0.117089
> -0.200000 -0.029486 0.163687
> 0.200000 0.029486 0.236313
> 0.200000 0.429486 -0.210286
> 0.200000 0.429486 0.189714
> 
> ###############################################
> '''
> # script start 
> 
> import Numeric
>  
> transArray = Numeric.array((
> (-2.11786, -0.817596, 0.946387, 0.864939),
> (0.405189, 1.25484, 2.11894, 0.434915),
> (-1.16679, 1.9198, -0.981965, 1.1389),
> (0, 0, 0, 1)
> ))
> 
> # a "1" added to the end of each set of vertix coordinates
> vertArray = Numeric.array((
> (-0.200000, -0.029486, -0.236313, 1),
> (0.200000, 0.029486, -0.163687, 1),
> (-0.200000, 0.370514, -0.282911, 1),
> (-0.200000, 0.370514, 0.117089, 1),
> (-0.200000, -0.029486, 0.163687, 1),
> (0.200000, 0.029486, 0.236313, 1),
> (0.200000, 0.429486, -0.210286, 1),
> (0.200000, 0.429486, 0.189714, 1)
> ))
> 
> print transArray
> print ""
> print vertArray
> print ""
> 
> transArray = Numeric.reshape(transArray,(4,4))
> vertArray = Numeric.reshape(vertArray,(4,8))
> 
> print Numeric.matrixmultiply(transArray,vertArray)
> 
> # script end
> '''
> ##################################################################
> Result:-
> 
> [[ 0.5708016   0.10309048  0.70481144 -1.12413     0.1022124
> 0.03400637  0.63866924 -1.12413   ]
>  [-0.6688108   0.57729922 -0.19537307  4.213884    0.3408408
> 0.72615216  0.66384632  4.213884  ]
>  [ 0.273571    1.26381257 -0.66763452  0.909945   -0.585931
> 1.13709619  0.39979     0.909945  ]
>  [ 0.2         0.429486   -0.210286    1.          0.2
> 0.429486    0.189714    1.        ]]
> 
> Am I going in the right direction?

No. The reshape didn't do what you want it to. The elements will have the same
order; it won't transpose the array. To do that, use the transpose() function.

> What do I do with the result? :)

When you have it correct, the last row will be all 1s. Ignore it.

-- 
Robert Kern

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



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Sep  3 10:26:30 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 03 Sep 2007 16:26:30 +0200
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
In-Reply-To: <46DB04DD.80801@v.loewis.de>
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
	<1188735642.391419.103650@19g2000hsx.googlegroups.com>
	<1188740716.423349.304370@y42g2000hsy.googlegroups.com>
	<1188743299.664137.194760@d55g2000hsg.googlegroups.com>
	<46daeaec$0$19889$426a74cc@news.free.fr>
	<46DB04DD.80801@v.loewis.de>
Message-ID: <46dc1995$0$30627$426a34cc@news.free.fr>

Martin v. L?wis a ?crit :
>>> (2) it is a interpretation language
>> Not quite. It's compiled to byte-code - just like Java (would you call
>> Java an 'interpreted language' ?)
> 
> Python is not implemented like Java. In Java (at least in HotSpot),
> the byte code is further compiled to machine code before execution;

This is a VM-specific feature.

> in Python, the byte code is interpreted.

Idem.

> Whether this makes Python an interpreter or a compiler,
> I don't know.

This is an old troll^Mdiscussion !-)

Now IANAL, but AFAIK, the byte-code compilation stage can make a great 
difference performances-wide, and for a same language, a byte-compiled 
implementation is likely to be faster than a pure-interpreted one, at 
least because of the saving on parsing time (please someone correct me 
if I'm wrong) ...


From no-spam at not-existing.invalid  Tue Sep 11 11:19:36 2007
From: no-spam at not-existing.invalid (robert)
Date: Tue, 11 Sep 2007 17:19:36 +0200
Subject: ValueError: insecure string pickle ?
Message-ID: <fc6bm9$jd6$1@news.albasani.net>

cPickle.loads  raised "ValueError: insecure string pickle".
The error is from a log file and I cannot reproduce it (quickly). 
What can be the cause for that error?

Robert


From http  Mon Sep  3 01:56:48 2007
From: http (Paul Rubin)
Date: 02 Sep 2007 22:56:48 -0700
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
	<1188735642.391419.103650@19g2000hsx.googlegroups.com>
	<1188740716.423349.304370@y42g2000hsy.googlegroups.com>
	<1188743299.664137.194760@d55g2000hsg.googlegroups.com>
	<46daeaec$0$19889$426a74cc@news.free.fr>
	<46DB04DD.80801@v.loewis.de>
	<46db085d$0$16113$9b4e6d93@newsspool1.arcor-online.net>
	<13dmctogeh19410@corp.supernews.com>
Message-ID: <7x4picthpb.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> writes: A big
> question mark in my mind is Lisp, which according to aficionados is
> just as dynamic as Python, but has native compilers that generate
> code running as fast as highly optimized C. I'm not qualified to
> judge whether the lessons learnt from Lisp can be applied to Python,
> but in any case Lisp is an old, old language -- only Fortran is
> older. The amount of development effort and money put into Lisp
> dwarfs that put into Python by possibly a hundred or more.

Writing a simple Lisp compiler is not all that difficult.  There's a
chapter in SICP about how to do it, so it's sometimes part of
introductory courses.  To get C-like performance you end up having to
rely on user-supplied type declarations and/or type inference, but
even without that you can still do ok.  I'd say Lisp is a less dynamic
language than Python.  Lisp doesn't have duck typing and doesn't
represent class instance variables as dictionary elements that have to
be looked up at runtime all the time.  This maybe even applies to
locals, e.g. in Python if you say

   x = 3
   print "hello"
   y = x + 4

you're possibly not guaranteed that y=7, because you might have bound
sys.stdout to something with a .write method that reaches up the call
stack and messes with the caller's local variables, and if the langref
manual says this is supposed to work, then the compiler has to do it
like CPython.  Maybe Python 4.0 will fix some of this stuff.


From kelvie at ieee.org  Sun Sep 23 16:16:51 2007
From: kelvie at ieee.org (Kelvie Wong)
Date: Sun, 23 Sep 2007 13:16:51 -0700
Subject: building a GUI
In-Reply-To: <5lnp2rF90pqqU1@mid.uni-berlin.de>
References: <1190557293.266783.251480@y42g2000hsy.googlegroups.com>
	<mailman.940.1190560838.2658.python-list@python.org>
	<pan.2007.09.23.17.41.52@gmail.com>
	<mailman.945.1190571251.2658.python-list@python.org>
	<5lnp2rF90pqqU1@mid.uni-berlin.de>
Message-ID: <94ccbe710709231316ld901bdfo6d9e57974df3d101@mail.gmail.com>

On 9/23/07, Diez B. Roggisch <deets at nospam.web.de> wrote:
>
> stef mientki schrieb:
> > Thomas Dybdahl Ahle wrote:
> >> Den Sun, 23 Sep 2007 17:28:38 +0200 skrev stef mientki:
> >>
> >>> yadin wrote:
> >>>
> >>>
> >>>> if i were up to make a GUI chich are the advantages of choosing
> python
> >>>> over matlab or java?
> >>>>
> >>>>
> >>> The best is Delphi,
> >>> second is VB,
> >>>
> >>
> >> That sounds mostly like a personal preference :)
> >>
> >>
> > Well I prefer Python ( because of it's OS-independancy and it's open
> > source),
> > but Python is really (still) much worse for GUI designs.
> > Just compare some parameters like:
> > - ease of use
> > - speed of development
> > - support of features
> > - availability of libraries
> > - documentation
>
> Sounds like PyQt for me. Best GUI-designer I know, tremendous speed in
> development, giant sized lib that does all kinds of stuff & is
> brilliantly designed + professional grade docus.
>
> Diez
> --
> http://mail.python.org/mailman/listinfo/python-list
>

I'll have to agree completely here, Qt is just so great to work with.  It
makes my day job (I have to do it in C++) much more bearable.  Phil Thompson
(who maintains PyQt) is also very responsive and updates frequently even if
you haven't bought a commercial licence for it.

I also have to agree that the Qt Designer is the best I've ever had to work
with, and I can't think of an instance where Qt Assistant wasn't open on one
desktop or another.

-- 
Kelvie
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From bj_666 at gmx.net  Thu Sep 27 12:42:55 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 27 Sep 2007 16:42:55 GMT
Subject: ValueError: too many values to unpack,>>>
References: <mailman.1169.1190911027.2658.python-list@python.org>
Message-ID: <5m24sfFatlbuU1@mid.uni-berlin.de>

On Thu, 27 Sep 2007 12:36:58 -0400, Shawn Minisall wrote:

> With the multiple value lines, python says this "ValueError: too many 
> values to unpack"
> 
> I've googled it and it says that happens when you have too few or too 
> many strings that don't match with the variables in number your trying 
> to assign them too.  Below are the lines in reading in:
> 
> line 3 - 19.18    29.15    78.75    212.10
> line 4 - 100    20    410.29   
> 
> And this is the code I'm using:
> 
>     #read withdrawls from file on line3
>     line = infile.readline()
>    
>     #split withdrawls up
>     withdraw1, withdraw2, withdraw3, withdraw4 = string.split(line, "\t")
> 
>     #read deposits from file on line4
>     line = infile.readline()
>     #split deposits up
>     deposit1, deposit2, deposit3 = string.split(line, "\t")
> 
> I have 4 strings to match line 3 and 3 to match the 3 on line 4...any 
> thoughts?

First thought is to find out which of the two lines triggers the
exception.  This information is part of the full traceback.

Ciao,
	Marc 'BlackJack' Rintsch


From kyosohma at gmail.com  Mon Sep 17 17:14:41 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Mon, 17 Sep 2007 21:14:41 -0000
Subject: Extracting xml from html
In-Reply-To: <1190062919.998077.112810@19g2000hsx.googlegroups.com>
References: <1190061079.025479.129070@w3g2000hsg.googlegroups.com>
	<1190062919.998077.112810@19g2000hsx.googlegroups.com>
Message-ID: <1190063681.632965.249020@y42g2000hsy.googlegroups.com>

On Sep 17, 4:01 pm, Paul Boddie <p... at boddie.org.uk> wrote:
> On 17 Sep, 22:31, kyoso... at gmail.com wrote:
>
>
>
> > What's the best way to get at the XML? Do I need to somehow parse it
> > using the HTMLParser and then parse that with minidom or what?
>
> Probably easiest is to use an XML processing toolkit or library which
> supports HTML parsing. Since the libxml2 library (written in C) makes
> a fairly good job of HTML parsing, I would suggest either libxml2dom
> (for a DOM-like API) or lxml (for an ElementTree-like API) as suitable
> Python wrappers of libxml2. Of course, HTMLParser or SGMLParser should
> work, but the programming style is a bit more convoluted unless you're
> used to XML processing using a SAX-like API.
>
> Paul
>
> P.S. I'm biased towards libxml2dom, being the developer, but I use it
> routinely and it generally does the job for me.

I have lxml installed and I appear to also have libxml2dom installed.
I know lxml has decent docs, but I don't see much for yours. Is this
the only place to go: http://www.boddie.org.uk/python/libxml2dom.html
?

Mike



From bignose+hates-spam at benfinney.id.au  Tue Sep 25 23:12:47 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 26 Sep 2007 13:12:47 +1000
Subject: An Editor that Skips to the End of a Def
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk> <fd0au1$fro$1@lust.ihug.co.nz>
	<5lhs4pF8bkunU1@mid.individual.net> <fd4168$ige$1@lust.ihug.co.nz>
	<slrnfff9op.1is.horpner@FIAD06.norwich.edu>
	<fd9ncb$q3l$1@lust.ihug.co.nz>
	<slrnffhe9g.2db.hat@se-162.se.wtb.tue.nl>
	<fdcfci$brq$1@lust.ihug.co.nz>
Message-ID: <87myvaktlc.fsf@benfinney.id.au>

Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> writes:

> That's another issue, that of ROI. Having learnt the vi/vim
> keystrokes, what does that enable you to do? Use vi/vim, and that's
> it.

There are a great many programs whose interactive keybindings come
from vi. Perhaps you've heard of 'less', 'screen', 'mutt', or dozens
of other frequently-used programs, all of which use 'vi key bindings
by default.

> Whereas I've found other situations where subsets of Emacs
> keystrokes are recognized, such as anything that uses GNU readline

Which can also be configured one-time by the user to use 'vi'
keybindings everywhere, so the 'vi' fanatic is able to keep using the
key bindings they know.

I think this argument is silly ? both Emacs and vi(m) have enormous
following, are both extremely capable editors, and both are clearly
the inspiration for many other programs' key bindings. It's ludicrous
to say of either program that "once you learn its key bindings you
only know how to use that program".

-- 
 \     "Welchen Teil von 'Gestalt' verstehen Sie nicht?  [What part of |
  `\             'gestalt' don't you understand?]"  -- Karsten M. Self |
_o__)                                                                  |
Ben Finney


From ldo at geek-central.gen.new_zealand  Mon Sep 10 20:36:17 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Tue, 11 Sep 2007 12:36:17 +1200
Subject: zlib
References: <mailman.320.1189432817.2658.python-list@python.org>
Message-ID: <fc4nu1$sf1$1@lust.ihug.co.nz>

In message <mailman.320.1189432817.2658.python-list at python.org>, Milos
Prudek wrote:

> Although I have Python 2.5 with zlib in my Linux disto, I need to install
> my own Python (as most Zope developers do).

Why?

> Zope requires zlib. Python 2.4.4 does not contain zlib.

So why does your own Python version have to be 2.4.4?


From bdesth.quelquechose at free.quelquepart.fr  Thu Sep 13 15:29:53 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 13 Sep 2007 21:29:53 +0200
Subject: Python 3K or Python 2.9?
In-Reply-To: <5ktfjqF5ctrvU2@mid.individual.net>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<5ksoaoF5am8cU1@mid.individual.net>
	<1189701793.466307.93210@g4g2000hsf.googlegroups.com>
	<5ktfjqF5ctrvU2@mid.individual.net>
Message-ID: <46e98fd8$0$27757$426a34cc@news.free.fr>

Bjoern Schliessmann a ?crit :
> TheFlyingDutchman wrote:
> 
>>Here's a FAQ item where they refer to it as I think Python should
>>have done it - a special predefined variable:
> 
> 
> Maybe. Personally, I like it the way it is in Python.
> 
> Why don't you make a preprocessor which accepts method declarations
> without "self" and fixes them?

The problem being that there's no such thing as a "method declaration" 
in Python - only functions being attributes of a class...

(ok, I know, you meant "functions declared within a class statement").


From arnodel at googlemail.com  Thu Sep  6 01:51:34 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Wed, 05 Sep 2007 22:51:34 -0700
Subject: Text processing and file creation
In-Reply-To: <mailman.123.1189036003.2658.python-list@python.org>
References: <1189008809.718361.45790@g4g2000hsf.googlegroups.com>
	<1189027883.834083.291430@19g2000hsx.googlegroups.com>
	<mailman.123.1189036003.2658.python-list@python.org>
Message-ID: <1189057894.218881.227020@d55g2000hsg.googlegroups.com>

On Sep 6, 12:46 am, Steve Holden <st... at holdenweb.com> wrote:
> Arnaud Delobelle wrote:
[...]
> > print "all done!" # All done
> > print "Now there are 4000 files in this directory..."
>
> > Python 3.0 - ready (I've used open() instead of file())
>
> bzzzzzzzzzzt!
>
> Python 3.0a1 (py3k:57844, Aug 31 2007, 16:54:27) ...
> Type "help", "copyright", "credits" or "license" for more information.
>  >>> print "all done!" # All done
>    File "<stdin>", line 1
>      print "all done!" # All done
>                      ^
> SyntaxError: invalid syntax
>  >>>

Damn!  That'll teach me to make such bold claims.
At least I'm unlikely to forget again now...

--
Arnaud



From wolf_tracks at invalid.com  Tue Sep 18 22:39:05 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Wed, 19 Sep 2007 02:39:05 GMT
Subject: Tutorial or Example (or Tutorial) of Using Canvas to Produce
	a Plot
In-Reply-To: <DT%Hi.552$6p6.84@newssvr25.news.prodigy.net>
References: <phRHi.50851$Um6.35199@newssvr12.news.prodigy.net>
	<13evohih7rkd030@corp.supernews.com>
	<WPTHi.5906$FO2.4148@newssvr14.news.prodigy.net>
	<13f0b2qlvj5ige6@corp.supernews.com>
	<hnWHi.9038$z_5.1095@nlpi069.nbdc.sbc.com>
	<9ai0f39lejmjc2qbfcgo1t4h8b3e6ot9jd@4ax.com>
	<DT%Hi.552$6p6.84@newssvr25.news.prodigy.net>
Message-ID: <dZ%Hi.554$6p6.491@newssvr25.news.prodigy.net>

Ah, I missed your link to Chap 11. That looks very helpful.

W. Watson wrote:
> Thanks. I've arranged for an inter-library loan(ILL), and probably will 
> not get his book for several days yet. I've had the book before, but was 
> really unable to get the time to pursue it (the ILL). I have his web 
> site bookmarked. I do not yet plan to buy his book, web or hardbound 
> yet. Maybe I can re-examine his site for examples, and find one that is 
> appropriate.
> 
> 
> Richard Townsend wrote:
>> On Tue, 18 Sep 2007 13:18:36 -0700, "W. Watson"
>> <wolf_tracks at invalid.com> wrote:
>>
>>> Tk is it. I'm really not interested in the others at this point.
>>>
>>
>> John Grayson's book 'Python and Tkinter Programming' has a chapter on
>> plotting Graphs and Charts. You can even download that chapter as a
>> PDF file:
>>
>> http://www.manning-source.com/books/grayson/grayson_ch11.pdf
>>
>> See http://www.manning.com/grayson/ for more info about the book.
>>
> 

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From bh at izb.knu.ac.kr  Sun Sep 30 06:22:07 2007
From: bh at izb.knu.ac.kr (Byung-Hee HWANG)
Date: Sun, 30 Sep 2007 19:22:07 +0900
Subject: Can you please give me some advice?
Message-ID: <1191147727.1699.15.camel@viola.izb.knu.ac.kr>

Hi there,

What is different between Ruby and Python? I am wondering what language
is really mine for work. Somebody tell me Ruby is clean or Python is
really easy! Anyway I will really make decision today what I have to
study from now on. What I make the decision is more difficult than to
know why I have to learn English. Yeah I do not like to learn English
because it is just very painful..

Can you please give me some advice?  

Byung-Hee



From python-url at phaseit.net  Mon Sep 24 07:46:50 2007
From: python-url at phaseit.net (Gabriel Genellina)
Date: Mon, 24 Sep 2007 11:46:50 +0000 (UTC)
Subject: Python-URL! - weekly Python news and links (Sep 24)
Message-ID: <fd883a$9kd$1@lairds.us>

QOTW:  "This thread shows again that Python's best feature is
comp.lang.python." - Joerg Schuster

"I find it best to treasure the saints, tolerate the irritable and ignore
the whiners." - RedGrittyBrick


    Python as a functional language: of limited usage due to stack limitations:
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/2b476f8d3a290f1b/
    
    Generator functions, generator expressions... what is a
    generator, after all?
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/7a4f8d011e6badcf/
    
    A proposal for removing bitwise operators (most people
    said "no, because..."):
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/4a16e4cba57b1c4d/
    
    How widely is Python used at Google?
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/af75a3e91a03ec18/
    
    An example of optimizing a Python program:
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/fa33727aa3a6751f/
    
    About sets, dicts, hash and mutable containers:
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/bc8377a8a5d89a3f/
    
    super() documentation and actual behavior are confusing:
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/9b38dc19c6beeb8b/
    
    Functions, the def statement, lambda calculus, and why those
    things are the way they are:
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/661eb7a7e80d310a/
    
    
========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

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

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

    Just beginning with Python?  This page is a great place to start:
	http://wiki.python.org/moin/BeginnersGuide/Programmers

    The Python Papers aims to publish "the efforts of Python enthusiats":
	http://pythonpapers.org/
    The Python Magazine is a technical monthly devoted to Python:
	http://pythonmagazine.com

    Readers have recommended the "Planet" sites:
	http://planetpython.org
	http://planet.python.org

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

    Python411 indexes "podcasts ... to help people learn Python ..."
    Updates appear more-than-weekly:
        http://www.awaretek.com/python/index.html

    Steve Bethard continues the marvelous tradition early borne by
    Andrew Kuchling, Michael Hudson, Brett Cannon, Tony Meyer, and Tim
    Lesher of intelligently summarizing action on the python-dev mailing
    list once every other week.
	http://www.python.org/dev/summary/

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

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

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

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

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

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch

    Although unmaintained since 2002, the Cetus collection of Python
    hyperlinks retains a few gems.
        http://www.cetus-links.org/oo_python.html

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

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

    Many Python conferences around the world are in preparation.
    Watch this space for links to them.

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
	http://www.python.org/dev/peps/pep-0042/

    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

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

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

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

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


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

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


-- The Python-URL! Team--

Phaseit, Inc. (http://phaseit.net) is pleased to participate in and
sponsor the "Python-URL!" project.  Watch this space for upcoming
news about posting archives.


From bdesth.quelquechose at free.quelquepart.fr  Sat Sep 15 13:28:11 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 15 Sep 2007 19:28:11 +0200
Subject: subclass of integers
In-Reply-To: <1189782046.121148.65220@22g2000hsm.googlegroups.com>
References: <1189780201.692192.291010@k79g2000hse.googlegroups.com>
	<1189782046.121148.65220@22g2000hsm.googlegroups.com>
Message-ID: <46ead5f3$0$14839$426a74cc@news.free.fr>

Zentrader a ?crit :
> This would accept ints, floats, and decimal types.

It doesn't...

> import decimal

Useless

> class Nint(int):
>     def __add__(self, x, y):

The prototype for __add__ is __add__(self, other)

>         try:
>             return x+y
>         except:
>             return None
> 
> if __name__=='__main__':
>     N=Nint()
>     print N.__add__( 1, 2 )
>     print N.__add__( 1, None )
>     print N.__add__(decimal.Decimal("2"), decimal.Decimal("3"))
>     print N.__add__(decimal.Decimal("2"), 3)
> 

i = Nint(42)
i + 33
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
TypeError: __add__() takes exactly 3 arguments (2 given)

The following works better (at least for integers - which is what the OP 
saked for), but it's still not the solution:
import types

class Nint(int):
     def __new__(cls, value=0):
         # doesn't work with Nint(None)...
	return int.__new__(cls, value)

     def __add__(self, other):
         if isinstance(other, int):
             return int.__add__(self, other)
         elif isinstance(other, types.NoneType):
             return None
         else:
             err = "unsupported operand type(s) for +: '%s' and '%s'" \
                   % (type(self), type(other))
             raise TypeError(err)



i = Nint(42)
=> 42
i + None
=> None
i + "allo"
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "/usr/tmp/python-8683q3Z", line 19, in __add__
TypeError: unsupported operand type(s) for +: '<class '__main__.Nint'>' 
and '<type 'str'>'

Fo some reasons I'm not sure about and didn't have time to investigate 
(some guru around ?), trying to catch a TypeError in __add__ failed - 
raising a TypeError ! But anyway, this isn't the correct solution since 
we don't want Nint.__add__ to return None when other is neither an int 
nor None.

Anyway, this still doesn't solves the OP's problem since it doesn't 
satisfy isinstance(Nint(None), NoneType). I tried making Nint a subclass 
of both int and NoneType, but it doesn't work for obvious reasons (None 
is a singleton). The only funny thing here is the error message when 
trying to call NoneType.__new__:

 >>> NoneType.__new__(NoneType)
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
TypeError: object.__new__(NoneType) is not safe, use NoneType.__new__()
 >>>

<OP>
The best I could come with is:

from types import NoneType

class Nint(int, NoneType):
     def __new__(cls, value=None):
	# by default, will return Nint(0) even if value is None
         return int.__new__(cls, value)

     def __add__(self, other):
         if isinstance(other, int):
             return int.__add__(self, other)
         elif isinstance(other, NoneType):
             return None
         else:
             err = "unsupported operand type(s) for +: '%s' and '%s'" \
                   % (type(self), type(other))
             raise TypeError(err)

    # other __functions__ to implement, left as an exercise to the OP

__all__ = [Nint]

Maybe some guru around will find something better, but I have some doubts...
</OP>




From __peter__ at web.de  Fri Sep 14 03:40:47 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 14 Sep 2007 09:40:47 +0200
Subject: "once" assigment in Python
References: <1189750616.597409.85380@w3g2000hsg.googlegroups.com>
Message-ID: <fcddtv$a7r$01$1@news.t-online.com>

Lorenzo Di Gregorio wrote:

> I've been using Python for some DES simulations because we don't need
> full C speed and it's so much faster for writing models.  During
> coding I find it handy to assign a variable *unless it has been
> already assigned*: I've found that this is often referred to as "once"
> assigment.
> 
> The best I could come up with in Python is:
> 
> try:
>   variable
> except NameError:
>   variable = method()
> 
> I wonder if sombody has a solution (trick, whatever ...) which looks
> more compact in coding.  Something like:
> 
> once(variable, method)
> 
> doesn't work, but it would be perfect.  Of course I can preprocess the
> Python code but an all-Python solution would be more handy.
> 
> Any suggestions?

You can use properties to implement lazy evaluation. Or you can rely on a
naming convention:

>>> class Once(object):
...     def __getattr__(self, name):
...             if name.startswith("_calc_"):
...                     raise AttributeError("No method to calculate attribute %r" % name[6:])
...             value = getattr(self, "_calc_" + name)()
...             setattr(self, name, value)
...             return value
... 
>>> class A(Once):
...     def _calc_foo(self):
...             print "calculating foo"
...             return 42
... 
>>> a = A()
>>> a.foo
calculating foo
42
>>> a.foo
42
>>> a.bar
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 5, in __getattr__
  File "<stdin>", line 4, in __getattr__
AttributeError: No method to calculate attribute 'bar'
>>> a._calc_bar = lambda: "bar-value"
>>> a.bar
'bar-value'

Peter


From deets at nospam.web.de  Wed Sep 26 07:44:19 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 26 Sep 2007 13:44:19 +0200
Subject: setuptools without unexpected downloads
References: <87ejgmklep.fsf@benfinney.id.au><5luhb0Faal8aU1@mid.uni-berlin.de>
	<874phhlupi.fsf@benfinney.id.au> <5lumarFae888U1@mid.uni-berlin.de>
	<1190802526.695391.326220@n39g2000hsh.googlegroups.com>
	<5lurorFa92euU1@mid.uni-berlin.de>
	<1190805012.275901.227570@57g2000hsv.googlegroups.com>
Message-ID: <5luv0iFaai82U1@mid.uni-berlin.de>

> I think most of the evolution has been in the surrounding tools,
> although stuff like the new Debian Python policy could be complicating
> factors. But I don't think the dependency stuff has changed that much
> over the years.

It might be, yet one thing is for sure: there have been various times in
debian in the last few year where for the sake of their own migration paths
to e.g. newere GCC-versions and the like a lot of seemingly "crude"
packages appeared, that catered to these needs. So it's not only about the
package form, one also has to take the actual distribution and even version
into consideration... seems daunting to me!

> My response here was mostly addressing the "global site-packages"
> issue since that's usually a big reason for people abandoning the
> system package/dependency management. If you can't find a new-enough
> system package, you have to either choose a local "from source"
> installation (which I would regard as a temporary measure for reasons
> given elsewhere with respect to maintenance), or to choose to
> repackage the upstream code and then install it through the system
> package manager, which I claim can be achieved in a non-global
> fashion.

Do I understand that correctly that essentially you're saying: if you want
your software released for a certain distro, package it up for it the way
it's supposed to be? I can understand that and said so myself - but then,
the whole setuptools-debate has come to an end.

Diez


From david at asdf.asdf  Mon Sep 10 03:42:16 2007
From: david at asdf.asdf (bambam)
Date: Mon, 10 Sep 2007 17:42:16 +1000
Subject: concise code (beginner)
References: <13dsvqrqivtf092@corp.supernews.com>
	<13dv4uqqb806ff0@corp.supernews.com> <fbqo83$8fd$1@lust.ihug.co.nz>
	<13e99756io95p66@corp.supernews.com> <fc2c86$i1l$4@lust.ihug.co.nz>
Message-ID: <13e9taoa44icgb4@corp.supernews.com>

I have a number of  news readers here, but all of them work
better  with top-posting, and in none of them is top posting
a problem. What software are you using?

Steve.


"Lawrence D'Oliveiro" <ldo at geek-central.gen.new_zealand> wrote in message 
news:fc2c86$i1l$4 at lust.ihug.co.nz...
> In message <13e99756io95p66 at corp.supernews.com>, bambam wrote:
>
>> Thank you,
>
> Don't top-post. 




From ricaraoz at gmail.com  Fri Sep  7 14:25:09 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Fri, 07 Sep 2007 15:25:09 -0300
Subject: why should I learn python
In-Reply-To: <200709061602.52121.brown@esteem.com>
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>	<mailman.189.1189118213.2658.python-list@python.org>	<87zlzzs9by.fsf@wilson.homeunix.com>
	<200709061602.52121.brown@esteem.com>
Message-ID: <46E19785.5030801@bigfoot.com>

Tom Brown wrote:
> On Thursday 06 September 2007 15:44, Torsten Bronger wrote:
>> Hall?chen!
>>
>> Tom Brown writes:
>>> [...] Python has been by far the easiest to develop in.  Some
>>> people might say it is not "real programming" because it is so
>>> easy.
>> I can't believe this.  Have you really heard such a statement?
> 
> Yes. I was told this by a C programmer. Something about doing it all yourself 
> and not using provided packages. I countered with something about reinventing 
> the wheel. :)
> 

You should have asked if he used the OS or did he control the devices
(HD, screen) himself.




From duncan.booth at invalid.invalid  Mon Sep 10 07:20:52 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 10 Sep 2007 11:20:52 GMT
Subject: less obvious "super"
References: <1189417830.645749.226120@d55g2000hsg.googlegroups.com>
Message-ID: <Xns99A77DA03E585duncanbooth@127.0.0.1>

Nagarajan <naga86 at gmail.com> wrote:

> Here is what I need to achieve..
> 
> class A :
>     def __init__( self ):
>         self.x  = 0

Don't use old style classes. If you are planning to use 'super' then you 
must use new-style classes, so use 'object' as a base class here.

> 
> class B ( A ):
>     def __init__( self, something ):
>         # Use "super" construct here so that I can "inherit" x of A
>         self.y  = something
> 
> How should I use "super" so that I could access the variable "x" of A
> in B?
> 
If you aren't worried about diamond shaped multiple inheritance 
hierarchies then just use:

class B ( A ):
    def __init__( self, something ):
        A.__init__(self)
        self.y  = something

If you are then:

class B ( A ):
    def __init__( self, something ):
        super(B, self).__init__()
        self.y  = something

When you use super you usually just want the current class and current 
instance as parameters. Putting that together:

>>> class A(object):
    def __init__( self ):
        self.x  = 0

        
>>> class B ( A ):
    def __init__( self, something ):
	super(B, self).__init__()
        self.y  = something

        
>>> obj = B(3)
>>> obj.x
0
>>> obj.y
3
>>> 


From wolf_tracks at invalid.com  Tue Sep 18 16:18:36 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Tue, 18 Sep 2007 13:18:36 -0700
Subject: Tutorial or Example (or Tutorial) of Using Canvas to Produce
	a Plot
In-Reply-To: <13f0b2qlvj5ige6@corp.supernews.com>
References: <phRHi.50851$Um6.35199@newssvr12.news.prodigy.net>
	<13evohih7rkd030@corp.supernews.com>
	<WPTHi.5906$FO2.4148@newssvr14.news.prodigy.net>
	<13f0b2qlvj5ige6@corp.supernews.com>
Message-ID: <hnWHi.9038$z_5.1095@nlpi069.nbdc.sbc.com>

Tk is it. I'm really not interested in the others at this point.

Grant Edwards wrote:
> On 2007-09-18, W. Watson <wolf_tracks at invalid.com> wrote:
> 
>> What would be appropriate? What are the choices? I'm pretty new to Python, 
>> but am familiar with the XWindow widget set.
> 
> There's no such thing as "the XWindow widget set".  There are
> at least 8-10 different X Windows widget sets.  The ones that I
> can name off the top of my head:
> 
>  Tk
>  Athena
>  Motif
>  FLTK
>  GTK
>  Qt
>  XRT 
>  WxWidgets (actually sort of meta-widget-set)
> 
> http://en.wikipedia.org/wiki/Widget_toolkit
> 
> http://en.wikipedia.org/wiki/List_of_widget_toolkits#On_Unix.2C_under_the_X_Window_System
>  

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Tue Sep 11 16:47:36 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Tue, 11 Sep 2007 22:47:36 +0200
Subject: Compiler Python
References: <000001c7f4a2$307fa720$917ef560$@com>
	<mailman.404.1189543244.2658.python-list@python.org>
Message-ID: <5kod78F3udmuU1@mid.individual.net>

anton a wrote:
> Someone knows since as I can obtain the information detailed about
> the compiler of Python? (Table of tokens, lists of productions of
> the syntactic one , semantic restrictions...)

I'm not really about the syntax of your question, but I'd try
looking at the source code.

Regards,


Bj?rn

-- 
BOFH excuse #228:

That function is not currently supported, but Bill Gates assures us
it will be featured in the next upgrade.



From knipknap at gmail.com  Thu Sep  6 13:41:42 2007
From: knipknap at gmail.com (Samuel)
Date: Thu, 06 Sep 2007 17:41:42 -0000
Subject: ImportError depending on the calling module
In-Reply-To: <1189097056.295186.62020@r29g2000hsg.googlegroups.com>
References: <1189079269.279716.254560@50g2000hsm.googlegroups.com>
	<1189093482.137051.73770@r29g2000hsg.googlegroups.com>
	<1189095236.413270.288090@50g2000hsm.googlegroups.com>
	<1189097056.295186.62020@r29g2000hsg.googlegroups.com>
Message-ID: <1189100502.390665.216830@o80g2000hse.googlegroups.com>

On Sep 6, 6:44 pm, Gabriel Genellina <gagsl-... at yahoo.com.ar> wrote:
> On 6 sep, 13:13, Samuel <knipk... at gmail.com> wrote:
>
> > On Sep 6, 5:44 pm, Gabriel Genellina <gagsl-... at yahoo.com.ar> wrote:
> > > They should import the package as any other
> > > client code, without doing any import tricks nor playing with
> > > sys.path.
>
> > Why does it matter whether I install it in sys.path or whether
> > sys.path is modified? What's the difference?
>
> Because it's more simple, less error prone, easier to test, more
> efficient...
>
> > What I am doing is I ship two modules in one tarball with my software.
> > The software is only unpacked and ran. It has to work without
> > installation.
>
> That's fine, and a good requirement. Place start2.py inside the
> container directory, and your package beneath it. Then you don't have
> to modify sys.path to find the package - "import packagename" just
> works. And it still works if the user installs the package (into site-
> packages, by example).
>
>  start1.py
>  start2.py
>  packagename/
>  |-- Obj.py
>  |-- __init__.py
>  |-- foo/
>      |-- FooTest.py
>      `-- __init__.py
>
> Packages are... well, packages, boxes. Don't try to import a module
> inside a package as it were a standalone module

But the start2.py script *is* part of the library. It should be in the
package.
However, I just found that Python 2.5 introduces relative imports.
This sounds like an attempt to remedy the situation.

-Samuel



From grante at visi.com  Wed Sep 12 19:41:20 2007
From: grante at visi.com (Grant Edwards)
Date: Wed, 12 Sep 2007 23:41:20 -0000
Subject: I want py2exe not to create library.zip
References: <mailman.452.1189627963.2658.python-list@python.org>
	<_tmdna-0DrGsxXXbnZ2dnUVZ8sjinZ2d@pipex.net>
Message-ID: <13egu90sgb71dd5@corp.supernews.com>

On 2007-09-12, Rob Williscroft <rtw at freenet.co.uk> wrote:
> On Wed, 12 Sep 2007 22:09:30 +0200, Laszlo Nagy wrote:
>
>> Hi,
>> 
>> I want py2exe not to create library.zip. My reason is that the installed
>> program will be a self updating program, and it must be able to download
>> changes (newer python source files) from the server. So the files should
>> not be in library.zip. I tried the --bundle option but apparently it can
>> only be used to make the distribution __more__ bundled.
>
> In your setup.py, after the call to setup(), use zipfile.ZipFile
> to extract the "library.zip" into a directory called "library" then
> delete the .zip.

Don't do that.  Use the "skip_archive" option to tell it not to
create the zip file.

-- 
Grant Edwards                   grante             Yow! Here I am in 53
                                  at               B.C. and all I want is a
                               visi.com            dill pickle!!


From jwkenne at attglobal.net  Thu Sep 20 20:47:57 2007
From: jwkenne at attglobal.net (John W. Kennedy)
Date: Thu, 20 Sep 2007 20:47:57 -0400
Subject: The meaning of  a = b  in object oriented languages
In-Reply-To: <wDJHi.22149$j7.399596@news.indigo.ie>
References: <1190094057.976729.285120@n39g2000hsh.googlegroups.com>
	<wDJHi.22149$j7.399596@news.indigo.ie>
Message-ID: <%wEIi.176$mS7.36@newsfe12.lga>

Russell Wallace wrote:
> Summercool wrote:
>> so most or all object oriented language do assignment by reference?
>> is there any object oriented language actually do assignment by
>> value?  I kind of remember in C++, if you do
>>
>> Animal a, b;
>>
>> a = b will actually be assignment by value.
>> while in Java, Python, and Ruby, there are all assignment by
>> reference.  ("set by reference")
>>
>> Is that the case: if a is an object, then b = a is only copying the
>> reference?
> 
> Yes, your understanding is exactly correct; C++ will assign by value 
> unless you explicitly use pointers, but the other languages will assign 
> by reference (except for primitive types).

Ada also assigns by value absent explicit use of access variables 
(similar to pointers or references).

The question, in fact, is meaningless. Java has a certain defined 
behavior. C++ has a certain defined behavior. Smalltalk has a certain 
defined behavior. LISP has a certain defined behavior. Ada has a certain 
defined behavior. Object-oriented languages as a class do not.
-- 
John W. Kennedy
"The poor have sometimes objected to being governed badly; the rich have 
always objected to being governed at all."
   -- G. K. Chesterton.  "The Man Who Was Thursday"


From garyjefferson123 at gmail.com  Wed Sep 12 14:17:51 2007
From: garyjefferson123 at gmail.com (garyjefferson123 at gmail.com)
Date: Wed, 12 Sep 2007 18:17:51 -0000
Subject: customizing a logging logger
In-Reply-To: <1189615607.631091.214240@o80g2000hse.googlegroups.com>
References: <1187412814.493872.325190@j4g2000prf.googlegroups.com>
	<1189527296.426004.17600@19g2000hsx.googlegroups.com>
	<1189615607.631091.214240@o80g2000hse.googlegroups.com>
Message-ID: <1189621071.960166.30490@22g2000hsm.googlegroups.com>

On Sep 12, 10:46 am, Vinay Sajip <vinay_sa... at yahoo.co.uk> wrote:
> On 11 Sep, 17:14, garyjefferson... at gmail.com wrote:
>
> > What is the best way to do this, so that I don't have to manually put
> > the self.ctx in the log string in hundreds of different places?
>
> Another way is to generate your log messages via a factory method
> which prepends the context: you can do this via a mixin, too.
>
> def log_message(self, msg):
>     return "%s: %s" % (self.ctx, msg)
>
> Note also that in recent versions, an optional "extra" parameter can
> be used, to pass info into the LogRecord.
>
> Seehttp://mail.python.org/pipermail/patches/2007-January/021535.html
> which may be of some help - it's a similar use case.
>
> Best regards,
>
> Vinay Sajip


The email thread you pointed to was very informative, especially since
I was about to go down the road of creating one logger per context
(eek!).

Whichever method I choose, I am particularly concerned with the
following aspect:

I like to use the "logger.debug("msg %s %s", s1, s2)" format, as I
understand that when the logging for this log level is turned off, we
don't have to do the potentially expensive string building that a '%'
operator would imply.

It seems like using something other than a literal string in the
message is the way to go, since I assume that its __repr__() won't get
called unless the logger is actually going to log a message for it.
Is that right?

Are any of the other methods likely to provide as-good or better
performance?

thanks,
Gary



From basilisk96 at gmail.com  Thu Sep  6 21:57:21 2007
From: basilisk96 at gmail.com (Basilisk96)
Date: Fri, 07 Sep 2007 01:57:21 -0000
Subject: interesting puzzle......try this you will be rewarded...
In-Reply-To: <IcYDi.1436$4J3.235@newssvr22.news.prodigy.net>
References: <1189072576.997085.32360@r29g2000hsg.googlegroups.com>
	<46e04138$0$16377$88260bb3@free.teranews.com>
	<IcYDi.1436$4J3.235@newssvr22.news.prodigy.net>
Message-ID: <1189130241.529344.52950@57g2000hsv.googlegroups.com>

I got to 14 :)

It's rather silly.

I remember seeing a more elaborate puzzle that involved coding,
cryptography knowledge, etc. to get through it. But what was the link,
I forget now...




From deets at nospam.web.de  Wed Sep  5 06:22:04 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 05 Sep 2007 12:22:04 +0200
Subject: creating really big lists
References: <1188985838.661821.41530@k79g2000hse.googlegroups.com>
	<87ejhd2zzt.fsf@rudin.co.uk>
Message-ID: <5k7eacF2g23sU2@mid.uni-berlin.de>

Paul Rudin wrote:

> Dr Mephesto <dnhkng at googlemail.com> writes:
> 
>> Hi!
>>
>> I would like to create a pretty big list of lists; a list 3,000,000
>> long, each entry containing 5 empty lists. My application will append
>> data each of the 5 sublists, so they will be of varying lengths (so no
>> arrays!).
>>
>> Does anyone know the most efficient way to do this? I have tried:
>>
>> list = [[[],[],[],[],[]] for _ in xrange(3000000)]
>>
>> but its not soooo fast. Is there a way to do this without looping?
> 
> You can do:
> 
>    [[[],[],[],[],[]]] * 3000000
> 
> although I don't know if it performs any better than what you already
> have.

You are aware that this is hugely different, because the nested lists are
references, not new instances? Thus the outcome is most probably (given the
gazillion of times people stumbled over this) not the desired one...

Diez


From Scott.Daniels at Acm.Org  Fri Sep 21 22:17:36 2007
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Fri, 21 Sep 2007 19:17:36 -0700
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <1190415741.380795.259050@y42g2000hsy.googlegroups.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<mailman.900.1190414696.2658.python-list@python.org>
	<1190415741.380795.259050@y42g2000hsy.googlegroups.com>
Message-ID: <13f8unjjeqs5p97@corp.supernews.com>

Cristian wrote:
> On Sep 21, 3:44 pm, Ron Adam <r... at ronadam.com> wrote:
> 
>> I think key may be to discuss names and name binding with your friend.

Here's an idea:

import math

def sin_integral(start, finish, dx):
     total = 0.0
     y0 = math.sin(start)
     for n in range(1, 1 + int((finish - start) / float(dx))):
         y1 = math.sin(start + n * dx)
         total += (y0 + y1)
         y0 = y1
     return total / 2. * dx


def cos_integral(start, finish, dx):
     total = 0.0
     y0 = math.sin(start)
     for n in range(1, 1 + int((finish - start) / float(dx))):
         y1 = math.cos(start + n * dx)
         total += (y0 + y1)
         y0 = y1
     return total / 2. * dx

generalize and separate the integration technique from the
function it integrates.


From mail at microcorp.co.za  Sat Sep  1 03:09:29 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 1 Sep 2007 09:09:29 +0200
Subject: Let's Unite Against Jews and Mongrels!
References: <1188198797.772672.60840@r29g2000hsg.googlegroups.com><1188300284.507909.126770@57g2000hsv.googlegroups.com><46D40BFE.2020301@comcast.net><023fd3dhtmb5j0hl2uvdc4f25d5s6vogkp@4ax.com>
	<46d81508$0$4536$9b4e6d93@newsspool3.arcor-online.net>
Message-ID: <01f201c7ec71$4af861c0$03000080@hendrik>

"Wildemar Wildenburger" <lasstwieso.net> wrote:

> Barry OGrady wrote:
> > He has some wrong ideas. The blacks are victims of the jews as well.
> > 
> 
> And Jews are the victims of "Christians". And Christians are the victims 
> of "Muslims".
> 
> Anybody not a victim of anyone else, please raise your hand!

Everybody seems to have missed the really funny part of the original
post -  He wrote something like "our skin is our uniform", and he was
going to use this to differentiate himself from Jews and Blacks.

He must have been referring to his foreskin...

- Hendrik



From christophertidy at hotmail.com  Mon Sep  3 04:48:19 2007
From: christophertidy at hotmail.com (christophertidy at hotmail.com)
Date: Mon, 03 Sep 2007 08:48:19 -0000
Subject: TypeError: 'module object is not callable'
Message-ID: <1188809299.316203.85930@22g2000hsm.googlegroups.com>

Hi

I am new to Python and have recieved this error message when trying to
instantiate an object from a class from another file within the same
directory and wondered what I have done wrong.

I have a Step.py class:
class Step(object)
        def __init__(self, sName):
        "Initialise a new Step instance"
        self.sName = sName
        self.depSteps = []
        self.remDepSteps = []
        self.isCompleted = 0


Then I have created a new file within the same directory called
main.py:

import Step
a  = Step("magn")

The following however generates the error
Traceback (most recent call last):
  File "main.py", line 3, in ?
    a  = Step("magn")
TypeError: 'module' object is not callable

If anyone could help point me in the right direction, how to fix this
problem it would be much appreciated.
Chris



From lew at lewscanon.com  Tue Sep 18 18:02:59 2007
From: lew at lewscanon.com (Lew)
Date: Tue, 18 Sep 2007 18:02:59 -0400
Subject: The meaning of a = b in object oriented languages
In-Reply-To: <1190098656.030658.66380@57g2000hsv.googlegroups.com>
References: <1190094057.976729.285120@n39g2000hsh.googlegroups.com>
	<f517e32aa6ad5d39debdff7b6dc84685@ruby-forum.com>
	<1190098656.030658.66380@57g2000hsv.googlegroups.com>
Message-ID: <_4OdnQm5joyO1m3bnZ2dnUVZ_tuonZ2d@comcast.com>

Summercool wrote:
> when a writing or a book reads "a is a Hash object; a is an Array
> object; or a is an Animal object" it is just a short form to say that
> "a is a reference to that object."
> 
> b = a means "whatever a is referencing to, now b is referencing it
> too".
> 
> so that's why  a[1] = "foobar"  will change what b will display, but
> a = "foobar" will not change what b will display.  

You can't do both in Java.  Is a an array or a String?  If a is a String and b 
is an array, then neither `a = b' nor `b = a' will compile in Java.

Java is a strongly-typed, compiled language which means it does more static 
type checking and thus would reject treating a as both an array and a String. 
  In that environment the programmer must choose one or the other.

Otherwise what you say is exactly correct.

> (because a[1] = "foobar" says "what is  a  referencing?  go there and change its
> content that has the index 1"  and when b goes there to see it, it is
> also changed.)

Speaking just of Java, it's useful to distinguish a variable from an object 
(instance).  As you point out, the variable represents a reference to the 
instance.  The variable has a compile-time type in Java, which may be 
different from the run-time type of the object, albeit compatible.

C++ is similar in this respect.  Python and Ruby are more, shall we say, 
flexible in their type systems.

Both jet liners and hang gliders have their uses, both are flight, and neither 
is really suitable for the other's purpose.

-- 
Lew


From lolu999 at gmail.com  Mon Sep 10 19:39:41 2007
From: lolu999 at gmail.com (a.m.)
Date: Mon, 10 Sep 2007 16:39:41 -0700
Subject: question on python syntax
Message-ID: <1189467581.200075.236120@g4g2000hsf.googlegroups.com>

If I type this in shell

$ ./yourfile.py 12:34 PM &

What does '$', '.', '/' and '& means in this succession? Note: 12:34
PM is a argument to the yourfile.py.



From gagsl-py2 at yahoo.com.ar  Fri Sep 28 22:52:24 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 28 Sep 2007 23:52:24 -0300
Subject: Can I overload the compare (cmp()) function for a Lists ([])
	index function?
References: <1191000652.430036.288400@y42g2000hsy.googlegroups.com>
	<1191001014.951696.285800@50g2000hsm.googlegroups.com>
Message-ID: <op.tzd99mufx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Fri, 28 Sep 2007 14:36:54 -0300, xkenneth <xkenneth at gmail.com> escribi?:

> On Sep 28, 12:30 pm, xkenneth <xkenn... at gmail.com> wrote:
>> Looking to do something similair. I'm working with alot of timestamps
>> and if they're within a couple seconds I need them to be indexed and
>> removed from a list.
>> Is there any possible way to index with a custom cmp() function?

The comparison is made by the list elements themselves (using their __eq__  
or __cmp__), not by the index method nor the list object.
So you should modify __cmp__ for all your timestamps (datetime.datetime, I  
presume?), but that's not very convenient. A workaround is to wrap the  
object you are searching into a new, different class - since the list  
items won't know how to compare to it, Python will try reversing the  
operands.
datetime objects are a bit special in this behavior: they refuse to  
compare to anything else unless the other object has a `timetuple`  
attribute (see <http://docs.python.org/lib/datetime-date.html> note (4))

<code>
import datetime

class datetime_tol(object):
     timetuple=None # unused, just to trigger the reverse comparison to  
datetime objects
     default_tolerance = datetime.timedelta(0, 10)

     def __init__(self, dt, tolerance=None):
         if tolerance is None:
             tolerance = self.default_tolerance
         self.dt = dt
         self.tolerance = tolerance

     def __cmp__(self, other):
         tolerance = self.tolerance
         if isinstance(other, datetime_tol):
             tolerance = min(tolerance, other.tolerance)
             other = other.dt
         if not isinstance(other, datetime.datetime):
             return cmp(self.dt, other)
         delta = self.dt-other
         return -1 if delta<-tolerance else 1 if delta>tolerance else 0

def index_tol(dtlist, dt, tolerance=None):
     return dtlist.index(datetime_tol(dt, tolerance))


d1 = datetime.datetime(2007, 7, 18, 9, 20, 0)
d2 = datetime.datetime(2007, 7, 18, 9, 30, 25)
d3 = datetime.datetime(2007, 7, 18, 9, 30, 30)
d4 = datetime.datetime(2007, 7, 18, 9, 30, 35)
d5 = datetime.datetime(2007, 7, 18, 9, 40, 0)
L = [d1,d2,d3,d4,d5]

assert d3 in L
assert L.index(d3)==2
assert L.index(datetime_tol(d3))==1 # using 10sec tolerance
assert index_tol(L, d3)==1
assert index_tol(L, datetime.datetime(2007, 7, 18, 9, 43, 20),  
datetime.timedelta(0, 5*60))==4 # 5 minutes tolerance
</code>

-- 
Gabriel Genellina



From bbxx789_05ss at yahoo.com  Fri Sep 21 03:50:21 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Fri, 21 Sep 2007 00:50:21 -0700
Subject: subprocess: returncode v. poll()
In-Reply-To: <mailman.831.1190323458.2658.python-list@python.org>
References: <1190315820.532320.26570@22g2000hsm.googlegroups.com>
	<1190316312.929039.85670@o80g2000hse.googlegroups.com>
	<1190316490.165848.248300@w3g2000hsg.googlegroups.com>
	<mailman.831.1190323458.2658.python-list@python.org>
Message-ID: <1190361021.103869.210240@r29g2000hsg.googlegroups.com>

On Sep 20, 3:24 pm, David <wizza... at gmail.com> wrote:
> On 9/20/07, 7stud <bbxx789_0... at yahoo.com> wrote:
>
>
>
> > On Sep 20, 1:25 pm, 7stud <bbxx789_0... at yahoo.com> wrote:
> > > On Sep 20, 1:17 pm, 7stud <bbxx789_0... at yahoo.com> wrote:
>
> > > > Hi,
>
> > > > What is the difference between:
>
> > > > 1) getting the returncode directly from the subprocess object
> > > > 2) calling poll() on the subprocess object?
>
> > > > Here is an example:
>
> > > > import subprocess
>
> > > > p = subprocess.Popen("ls", stdout=subprocess.PIPE)
> > > > print p.returncode
> > > > print p.poll()
> > > > print
>
> > > > print p.stdout.read()[:5]
> > > > print
>
> > > > print p.returncode
> > > > print p.poll()
> > > > print p.returncode
>
> > > > --output:--
> > > > None
> > > > None
>
> > > > 10tes
>
> > > > None
> > > > 0
> > > > 0
>
> > > Hmm....after a little more testing, I don't think returncode
> > > dynamically updates:
>
> > > import subprocess
> > > import time
>
> > > p = subprocess.Popen("ls", stdout=subprocess.PIPE)
>
> > > print p.returncode
> > > time.sleep(5)
> > > print p.returncode
> > > time.sleep(2)
> > > print p.returncode
>
> > > print p.stdout.read()[:5]
> > > print p.returncode
>
> > > --output:--
> > > None
> > > None
> > > None
> > > 10tes
> > > None
>
> > ...but then when is p.returncode set?  And what good is it?
>
> AFAICT p.returncode is only set by Popen methods. It doesn't
> automatically get set by the OS internals that manage the actual
> process.
>
> One place where it is useful is when using Popen's communicate()
> method, which returns (stdout,stderr), but not the return code. Also
> it lets you call poll() but not have to save poll()'s return value.

I didn't understand your post when I first read it, but after looking
at my output again, and rereading your post, I get it now.  In case
someone else doesn't understand it:  returncode is not set by the
child process--ever.  return code starts off with a default value of
None, and it remains None until you call a method in the subprocess
module, like poll() or wait().  Those methods set and then return
returncode.  As a result, if you want to know what the status of the
child process is, you have to call either poll() or wait().



From python at rcn.com  Tue Sep  4 21:39:50 2007
From: python at rcn.com (Raymond Hettinger)
Date: Tue, 04 Sep 2007 18:39:50 -0700
Subject: Does shuffle() produce uniform result ?
In-Reply-To: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
Message-ID: <1188956390.192897.10640@g4g2000hsf.googlegroups.com>

On Aug 24, 12:38 am, tooru honda <tooru_ho... at fast-mail.org> wrote:
> 1. Does shuffle() produce uniform result ?

If you're worried about this microscopic bias (on the order of
2**-53), then shuffle more than once.  That will distribute the bias
more evenly:

  def super_shuffle(sequence):
      for i in range(10):
           shuffle(sequence)


Raymond Hettinger






From hat at se-162.se.wtb.tue.nl  Wed Sep 19 08:37:47 2007
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Wed, 19 Sep 2007 14:37:47 +0200
Subject: cannot create my own dict
Message-ID: <slrnff260r.43o.hat@se-162.se.wtb.tue.nl>

Hello all,

This morning I tried to create my own read-only dictionary, and failed
miserably.
I don't understand why, can somebody enlighten me?

Below is a brute-force experiment that cannot deal with "x in obj", plz read
the explanation below the code:
--------------------------------
class myowndict(object):
    def __init__(self, mydict):
        self.mydict = mydict

# Below is produced with
# print '\n'.join(['        self.%s = self.mydict.%s' % (v,v)
#                                         for v in dir(dict)])
# commented-out functions done by hand
#
        #self.__class__ = self.mydict.__class__
        self.__cmp__ = self.mydict.__cmp__
        self.__contains__ = self.mydict.__contains__
        self.__delattr__ = self.mydict.__delattr__
        self.__delitem__ = self.mydict.__delitem__
        #self.__doc__ = self.mydict.__doc__
        self.__eq__ = self.mydict.__eq__
        self.__ge__ = self.mydict.__ge__
        self.__getattribute__ = self.mydict.__getattribute__
        self.__getitem__ = self.mydict.__getitem__
        self.__gt__ = self.mydict.__gt__
        self.__hash__ = self.mydict.__hash__
        #self.__init__ = self.mydict.__init__
        self.__iter__ = self.mydict.__iter__
        self.__le__ = self.mydict.__le__
        self.__len__ = self.mydict.__len__
        self.__lt__ = self.mydict.__lt__
        self.__ne__ = self.mydict.__ne__
        #self.__new__ = self.mydict.__new__
        self.__reduce__ = self.mydict.__reduce__
        self.__reduce_ex__ = self.mydict.__reduce_ex__
        self.__repr__ = self.mydict.__repr__
        self.__setattr__ = self.mydict.__setattr__
        self.__setitem__ = self.mydict.__setitem__
        self.__str__ = self.mydict.__str__
        self.clear = self.mydict.clear
        self.copy = self.mydict.copy
        self.fromkeys = self.mydict.fromkeys
        self.get = self.mydict.get
        self.has_key = self.mydict.has_key
        self.items = self.mydict.items
        self.iteritems = self.mydict.iteritems
        self.iterkeys = self.mydict.iterkeys
        self.itervalues = self.mydict.itervalues
        self.keys = self.mydict.keys
        self.pop = self.mydict.pop
        self.popitem = self.mydict.popitem
        self.setdefault = self.mydict.setdefault
        self.update = self.mydict.update
        self.values = self.mydict.values

        # end of __init__

if __name__ == '__main__':
    fd = myowndict({1:10})
    print 1 in fd  # FAILS! (with "TypeError: iterable argument required")
--------------------------------

I wanted to make my own dictionary. However, a simple element test failed
(after implementing various __*__ functions), and I cannot figure out why.

The above code is a brute force attempt, where I forward all methods (except
__class__, __doc__, __init__, and __new__) to my local 'mydict' object.

IT STILL FAILS.

So if copying all methods of a native dictionary is not enough, what should I
do to make my class work as a dictionary WITHOUT deriving from dict (which will
obviously work).



Sincerely,
Albert


From Praveen.Shilavantar at in.tesco.com  Thu Sep 20 06:35:19 2007
From: Praveen.Shilavantar at in.tesco.com (Shilavantar, Praveen)
Date: Thu, 20 Sep 2007 16:05:19 +0530
Subject: AIX - Python - db2.py
Message-ID: <6702B04331BCF8408F9FE92AFC5349B7E442@INBLRCLUMS0201.in.tesco.org>

 
Hi,
 
    I am getting the following error while installing PyDB2 package on
AIX machine. 
So can anybody give me the requirements list and a procedure to install
PyDb2 package on AIX.
 
 
xn75 at ti057:/home/xn75/PyDB2-1.1.0> python setup.py install
Your DB2 root is:
WARNING: it seems that you did not install 'Application Development
Kit'.
Compilation may fail.
 
running install
running build
running build_py
not copying DB2.py (output up-to-date)
running build_ext
building '_db2' extension
cc_r -O -Iinclude -I/usr/local/include/python2.1 -c _db2_module.c -o
build/temp.aix-5.3-2.1/_db2_module.o
"_db2_module.c", line 24.10: 1506-296 (S) #include file <sqlcli1.h> not
found.
"_db2_module.c", line 25.10: 1506-296 (S) #include file <sqlenv.h> not
found.
"_db2_module.c", line 47.9: 1506-046 (S) Syntax error.
"_db2_module.c", line 52.11: 1506-045 (S) Undeclared identifier
SQL_BIGINT.
"_db2_module.c", line 52.33: 1506-026 (S) Number of initializers cannot
be greater than the number of aggregate members.
"_db2_module.c", line 53.11: 1506-045 (S) Undeclared identifier
SQL_BINARY.
"_db2_module.c", line 53.33: 1506-026 (S) Number of initializers cannot
be greater than the number of aggregate members.
"_db2_module.c", line 54.11: 1506-045 (S) Undeclared identifier
SQL_BLOB.
"_db2_module.c", line 54.33: 1506-026 (S) Number of initializers cannot
be greater than the number of aggregate members.
"_db2_module.c", line 55.11: 1506-045 (S) Undeclared identifier
SQL_BLOB_LOCATOR.
"_db2_module.c", line 55.33: 1506-026 (S) Number of initializers cannot
be greater than the number of aggregate members.
"_db2_module.c", line 56.11: 1506-045 (S) Undeclared identifier
SQL_CHAR.
"_db2_module.c", line 56.33: 1506-026 (S) Number of initializers cannot
be greater than the number of aggregate members.
"_db2_module.c", line 57.11: 1506-045 (S) Undeclared identifier
SQL_CLOB.
"_db2_module.c", line 57.33: 1506-026 (S) Number of initializers cannot
be greater than the number of aggregate members.
"_db2_module.c", line 58.11: 1506-045 (S) Undeclared identifier
SQL_CLOB_LOCATOR.
"_db2_module.c", line 58.33: 1506-026 (S) Number of initializers cannot
be greater than the number of aggregate members.
"_db2_module.c", line 59.11: 1506-045 (S) Undeclared identifier
SQL_TYPE_DATE.
"_db2_module.c", line 59.33: 1506-026 (S) Number of initializers cannot
be greater than the number of aggregate members.
"_db2_module.c", line 60.11: 1506-045 (S) Undeclared identifier
SQL_DBCLOB.
"_db2_module.c", line 60.33: 1506-026 (S) Number of initializers cannot
be greater than the number of aggregate members.
"_db2_module.c", line 61.11: 1506-045 (S) Undeclared identifier
SQL_DBCLOB_LOCATOR.
"_db2_module.c", line 61.33: 1506-026 (S) Number of initializers cannot
be greater than the number of aggregate members.
"_db2_module.c", line 62.11: 1506-045 (S) Undeclared identifier
SQL_DECIMAL.
"_db2_module.c", line 62.33: 1506-026 (S) Number of initializers cannot
be greater than the number of aggregate members.
"_db2_module.c", line 63.11: 1506-045 (S) Undeclared identifier
SQL_DOUBLE.
"_db2_module.c", line 63.33: 1506-026 (S) Number of initializers cannot
be greater than the number of aggregate members.
"_db2_module.c", line 64.11: 1506-045 (S) Undeclared identifier
SQL_FLOAT.
"_db2_module.c", line 64.33: 1506-026 (S) Number of initializers cannot
be greater than the number of aggregate members.
"_db2_module.c", line 65.11: 1506-045 (S) Undeclared identifier
SQL_GRAPHIC.
"_db2_module.c", line 65.33: 1506-026 (S) Number of initializers cannot
be greater than the number of aggregate members.
"_db2_module.c", line 66.11: 1506-045 (S) Undeclared identifier
SQL_INTEGER.
"_db2_module.c", line 66.33: 1506-026 (S) Number of initializers cannot
be greater than the number of aggregate members.
"_db2_module.c", line 67.11: 1506-045 (S) Undeclared identifier
SQL_LONGVARCHAR.
"_db2_module.c", line 67.33: 1506-026 (S) Number of initializers cannot
be greater than the number of aggregate members.
"_db2_module.c", line 68.11: 1506-045 (S) Undeclared identifier
SQL_LONGVARBINARY.
"_db2_module.c", line 68.33: 1506-026 (S) Number of initializers cannot
be greater than the number of aggregate members.
"_db2_module.c", line 69.11: 1506-045 (S) Undeclared identifier
SQL_LONGVARGRAPHIC.
"_db2_module.c", line 69.33: 1506-026 (S) Number of initializers cannot
be greater than the number of aggregate members.
"_db2_module.c", line 70.11: 1506-045 (S) Undeclared identifier
SQL_NUMERIC.
"_db2_module.c", line 70.33: 1506-026 (S) Number of initializers cannot
be greater than the number of aggregate members.
"_db2_module.c", line 71.11: 1506-045 (S) Undeclared identifier
SQL_REAL.
"_db2_module.c", line 71.33: 1506-026 (S) Number of initializers cannot
be greater than the number of aggregate members.
"_db2_module.c", line 72.11: 1506-045 (S) Undeclared identifier
SQL_SMALLINT.
"_db2_module.c", line 72.33: 1506-026 (S) Number of initializers cannot
be greater than the number of aggregate members.
"_db2_module.c", line 73.11: 1506-045 (S) Undeclared identifier
SQL_TYPE_TIME.
"_db2_module.c", line 73.33: 1506-026 (S) Number of initializers cannot
be greater than the number of aggregate members.
"_db2_module.c", line 74.11: 1506-045 (S) Undeclared identifier
SQL_TYPE_TIMESTAMP.
"_db2_module.c", line 74.33: 1506-026 (S) Number of initializers cannot
be greater than the number of aggregate members.
"_db2_module.c", line 75.11: 1506-045 (S) Undeclared identifier
SQL_VARCHAR.
"_db2_module.c", line 75.33: 1506-026 (S) Number of initializers cannot
be greater than the number of aggregate members.
"_db2_module.c", line 76.11: 1506-045 (S) Undeclared identifier
SQL_VARBINARY.
"_db2_module.c", line 76.33: 1506-026 (S) Number of initializers cannot
be greater than the number of aggregate members.
"_db2_module.c", line 77.11: 1506-045 (S) Undeclared identifier
SQL_VARGRAPHIC.
"_db2_module.c", line 77.33: 1506-026 (S) Number of initializers cannot
be greater than the number of aggregate members.
"_db2_module.c", line 78.11: 1506-045 (S) Undeclared identifier
SQL_DATALINK.
"_db2_module.c", line 78.33: 1506-026 (S) Number of initializers cannot
be greater than the number of aggregate members.
"_db2_module.c", line 79.14: 1506-026 (S) Number of initializers cannot
be greater than the number of aggregate members.
"_db2_module.c", line 82.7: 1506-282 (S) The type of the parameters must
be specified in a prototype.
"_db2_module.c", line 90.11: 1506-045 (S) Undeclared identifier
SQL_SUCCESS.
"_db2_module.c", line 91.11: 1506-045 (S) Undeclared identifier
SQL_SUCCESS_WITH_INFO.
"_db2_module.c", line 92.11: 1506-045 (S) Undeclared identifier
SQL_ERROR.
"_db2_module.c", line 93.11: 1506-045 (S) Undeclared identifier
SQL_INVALID_HANDLE.
"_db2_module.c", line 94.11: 1506-045 (S) Undeclared identifier
SQL_NO_DATA_FOUND.
"_db2_module.c", line 95.11: 1506-045 (S) Undeclared identifier
SQL_STILL_EXECUTING.
"_db2_module.c", line 96.11: 1506-045 (S) Undeclared identifier
SQL_NEED_DATA.
"_db2_module.c", line 100.27: 1506-275 (S) Unexpected text SQLRETURN
encountered.
"_db2_module.c", line 150.9: 1506-046 (S) Syntax error.
"_db2_module.c", line 154.33: 1506-045 (S) Undeclared identifier
SQL_MAX_DSN_LENGTH.
"_db2_module.c", line 154.33: 1506-195 (S) Integral constant expression
with a value greater than zero is required.
"_db2_module.c", line 177.19: 1506-282 (S) The type of the parameters
must be specified in a prototype.
"_db2_module.c", line 178.12: 1506-282 (S) The type of the parameters
must be specified in a prototype.
"_db2_module.c", line 179.12: 1506-282 (S) The type of the parameters
must be specified in a prototype.
"_db2_module.c", line 212.9: 1506-046 (S) Syntax error.
"_db2_module.c", line 221.9: 1506-046 (S) Syntax error.
"_db2_module.c", line 237.9: 1506-046 (S) Syntax error.
"_db2_module.c", line 256.9: 1506-046 (S) Syntax error.
"_db2_module.c", line 305.39: 1506-046 (S) Syntax error.
"_db2_module.c", line 327.25: 1506-275 (S) Unexpected text rc
encountered.
"_db2_module.c", line 329.14: 1506-045 (S) Undeclared identifier rc.
"_db2_module.c", line 343.25: 1506-275 (S) Unexpected text rc
encountered.
"_db2_module.c", line 345.14: 1506-045 (S) Undeclared identifier rc.
"_db2_module.c", line 398.35: 1506-022 (S) "hstmt" is not a member of
"struct {...}".
"_db2_module.c", line 398.42: 1506-045 (S) Undeclared identifier
SQL_HANDLE_STMT.
"_db2_module.c", line 434.35: 1506-022 (S) "hstmt" is not a member of
"struct {...}".
"_db2_module.c", line 434.42: 1506-045 (S) Undeclared identifier
SQL_HANDLE_STMT.
"_db2_module.c", line 455.35: 1506-022 (S) "hdbc" is not a member of
"struct {...}".
"_db2_module.c", line 455.41: 1506-045 (S) Undeclared identifier
SQL_HANDLE_DBC.
"_db2_module.c", line 480.27: 1506-275 (S) Unexpected text handle
encountered.
"_db2_module.c", line 480.47: 1506-275 (S) Unexpected text handleType
encountered.
"_db2_module.c", line 482.25: 1506-277 (S) Syntax error: possible
missing ';' or ','?
"_db2_module.c", line 482.9: 1506-045 (S) Undeclared identifier SQLCHAR.
"_db2_module.c", line 494.9: 1506-045 (S) Undeclared identifier
SQLINTEGER.
"_db2_module.c", line 495.9: 1506-045 (S) Undeclared identifier
SQLRETURN.
"_db2_module.c", line 502.30: 1506-276 (S) Syntax error: possible
missing ')'?
"_db2_module.c", line 500.17: 1506-045 (S) Undeclared identifier
handleType.
"_db2_module.c", line 501.17: 1506-045 (S) Undeclared identifier handle.
"_db2_module.c", line 499.9: 1506-045 (S) Undeclared identifier rc.
"_db2_module.c", line 507.18: 1506-045 (S) Undeclared identifier
msgTextOutLen.
"_db2_module.c", line 513.52: 1506-045 (S) Undeclared identifier
sqlState.
"_db2_module.c", line 515.46: 1506-045 (S) Undeclared identifier
nativeErr.
"_db2_module.c", line 517.52: 1506-045 (S) Undeclared identifier
msgText.
error: command 'cc_r' failed with exit status 1
xn75 at ti057:/home/xn75/PyDB2-1.1.0>
 
Regards,  
- Praveen V S 
 


---- Disclaimer ----
This is a confidential email.  Tesco may monitor and record all emails.  The views expressed in this email are those of the sender and not Tesco.

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Company Number: 519500
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From ratchetgrid at googlemail.com  Thu Sep 27 12:15:42 2007
From: ratchetgrid at googlemail.com (Nathan Harmston)
Date: Thu, 27 Sep 2007 17:15:42 +0100
Subject: Pb with an AttributeError
In-Reply-To: <FFC5D92B345ADD428B11AA3943023F300417685E@BARDEAU.hmc.jet>
References: <FFC5D92B345ADD428B11AA3943023F300417685E@BARDEAU.hmc.jet>
Message-ID: <676224240709270915x537a6426h1512cbddccb5c68f@mail.gmail.com>

Hi,

I m not sure what your trying to do, but this is where your problem is:

string1 is not a string it is actually a dict because of your eval.
When you call
string1["param"] inside the string.split()

it is returning a dictionary and not a string....
'param': {'key': 'SP<136>=', 'value': ['SD:<0> ']}

since {'key': 'SP<136>=', 'value': ['SD:<0> ']} is inside curly
brackets it is a dictionary.

I still dont get what your trying to have as your final result, but
hope this helps.

Thanks

Nathan

On 27/09/2007, Eric BOUVIER <ebouvier at jetmultimedia.fr> wrote:
>
>
>
> Hello,
>
> First, sorry for my english.
>
> I've just been assigned a project written in Python which contains bug(s).
> I've never programmed in Python, but I've read the code
> and understood basically what the different source codes do.
>
> I've traced the code and found where the problem is but I don't
> know how to solve the problem.
>
> Here it is :
>
> I've got a string issued from a CSV file :
>    string1 = eval(line[4])
>    print " * string1 = (", string1 ,") \n"
>         =>  * string1 = ( {'header': 'X-Score', 'param': {'key': 'SP<136>=',
> 'value': ['SD:<0> ']} )
>
> Then, there is a split with the equal :
>    TheParts = string.split(string1["param"], "=")
>    print " * TheParts = (", TheParts ,") \n"
>
> But, running the program returns :
>
> Traceback (most recent call last):
>   File "C:\test\helper.py", line 136, in Action_handler
>     Score_eval(line, OutputFile_SP, This_Host)
>   File "C:\test\helper.py", line 66, in Score_eval
>     TheParts = string.split(string1["param"], "=")
>   File "C:\ActiveState\Python25\lib\string.py", line 290,
> in split
>     return s.split(sep, maxsplit)
> AttributeError: 'dict' object has no attribute 'split'  !?!
>
> I've found that it works when I put directly the string in the split
> expression :
>
>    TheParts = string.split(" {'key': 'ESP<136>=', 'value': ['SHA:<0> ']} ",
> "=")
>       => * TheParts =   ["{'key': 'ESP<136>", "', 'value': ['SHA:<0> ']}"]
>
>   But the code isn't dynamic anymore !
> I think it's a problem with the type, but the different syntax I've tried
> didn't work.
> Is somebody could help me ?
>
>  Thank you
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From ldo at geek-central.gen.new_zealand  Wed Sep 19 05:45:11 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Wed, 19 Sep 2007 21:45:11 +1200
Subject: How can I know how much to read from a subprocess
References: <1190070896.332844.23080@22g2000hsm.googlegroups.com>
Message-ID: <fcqr37$c4b$1@lust.ihug.co.nz>

In message <1190070896.332844.23080 at 22g2000hsm.googlegroups.com>, 
spam.noam at gmail.com wrote:

> ... how can I know if the process wrote something to its
> output, and how much it wrote?

Others have mentioned using one-byte reads. To tell if something is
available for reading, use select
<http://docs.python.org/lib/module-select.html>.


From semanticist at gmail.com  Tue Sep 25 11:48:23 2007
From: semanticist at gmail.com (Miles)
Date: Tue, 25 Sep 2007 11:48:23 -0400
Subject: Regular Expressions: Can't quite figure this problem out
In-Reply-To: <1190733242.746403.264650@o80g2000hse.googlegroups.com>
References: <496954360709241737o6e42e7efk29886b5631f6ca2e@mail.gmail.com>
	<a49e45f50709241827i107d0acav28431853ef403702@mail.gmail.com>
	<496954360709241853w6bb6e813ved0ec4fc80304d51@mail.gmail.com>
	<op.ty6tjyfqx6zn5v@gabriel2.softlabbsas.com.ar>
	<496954360709241917m3801e4aavee29cfef7deaf41b@mail.gmail.com>
	<fd9rs6$8b2$1@sea.gmane.org>
	<496954360709241951h6901d60etf2c4b3b5ec759f2a@mail.gmail.com>
	<mailman.1026.1190694227.2658.python-list@python.org>
	<1190733242.746403.264650@o80g2000hse.googlegroups.com>
Message-ID: <a49e45f50709250848j3f604e77g83e9b1acd3708108@mail.gmail.com>

On 9/25/07, Paul McGuire wrote:
> On Sep 24, 11:23 pm, Gabriel Genellina wrote:
> > py> print re.sub(r"<(\w+)([^>]*)></\1>", r"<\1\2 />", source)
>
> And let's hope the OP doesn't have to parse anything truly nasty like:
>
> <esolang:language name="Python" interpreter_prompt=">>>"></
> esolang:language>

Or something mildly nasty, like <foo><foo/></foo>

-Miles


From robin at reportlab.com  Fri Sep 28 07:20:39 2007
From: robin at reportlab.com (Robin Becker)
Date: Fri, 28 Sep 2007 12:20:39 +0100
Subject: recipient validation with smtplib 
Message-ID: <46FCE387.9070601@chamonix.reportlab.co.uk>

Is there a way to use smtplib to get recipient validation. I can use smtplib 
quite happily to send emails using the locahost's sendmail, but sendmail is just 
  fire and forget, so some bad addresses eg idiot at www.dingo.zzz don't cause any 
error in the sending application. I know some smtp setups do enforce recipient 
validation, but it doesn't seem terribly easy to do this with sendmail. I 
wondered if there were some way to do this in python?
-- 
Robin Becker



From uymqlp502 at sneakemail.com  Sat Sep  1 01:40:20 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Fri, 31 Aug 2007 22:40:20 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <mailman.246.1188611408.28954.python-list@python.org>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<1188523589.736146.263510@l22g2000prc.googlegroups.com>
	<1i3o9kr.2gmni61g62moaN%aleax@mac.com>
	<7xwsvcc9yz.fsf@ruckus.brouhaha.com>
	<1i3p8lm.19738kn1q0gkouN%aleax@mac.com>
	<1188587846.687895.69240@q5g2000prf.googlegroups.com>
	<38rmq4-cq.ln1@strongwill.g2ctech>
	<mailman.246.1188611408.28954.python-list@python.org>
Message-ID: <1188625220.930546.217860@g4g2000hsf.googlegroups.com>

On Aug 31, 6:45 pm, Steve Holden

> We probably need to distinguish between "mission-critical", where a
> program has to work reliably for an organization to meet its goals, and
> "safety-critical" where people die or get hurt if the program misbehaves.

The term "mission critical" itself can have a wide range of
connotations.

If a software failure would force a military pilot to abort his
mission and hobble back home with a partially disabled aircraft,
that's what I think of as "mission critical" software.

If Google needs reliable software on its servers to maintain its
revenue stream, that's another kind of "mission critical" software,
but the criticality is certainly less immediate in that case.

In the first case, the software glitch definitely causes mission
failure. In the Google case, the software problems *may* ultimately
cause mission failure, but probably only if nothing is done for quite
some time to rectify the situation. If that is the case, then the
software itself is not the critical factor unless it cannot be
corrected and made to function properly in a reasonable amount of time.



From george.sakkis at gmail.com  Sun Sep 30 12:48:10 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: Sun, 30 Sep 2007 16:48:10 -0000
Subject: Can you please give me some advice?
In-Reply-To: <mailman.1300.1191147737.2658.python-list@python.org>
References: <mailman.1300.1191147737.2658.python-list@python.org>
Message-ID: <1191170890.744290.27840@19g2000hsx.googlegroups.com>

On Sep 30, 6:22 am, Byung-Hee HWANG <b... at izb.knu.ac.kr> wrote:
> Hi there,
>
> What is different between Ruby and Python? I am wondering what language
> is really mine for work. Somebody tell me Ruby is clean or Python is
> really easy! Anyway I will really make decision today what I have to
> study from now on. What I make the decision is more difficult than to
> know why I have to learn English. Yeah I do not like to learn English
> because it is just very painful..
>
> Can you please give me some advice?
>
> Byung-Hee


"Dive into Python" has been translated in Chinese:
http://www.woodpecker.org.cn/diveintopython/

Hope it helps,
George



From zzbbaadd at aol.com  Fri Sep 28 13:26:34 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Fri, 28 Sep 2007 10:26:34 -0700
Subject: Python 3.0 migration plans?
In-Reply-To: <5m4qc2Fbbk19U1@mid.uni-berlin.de>
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>
	<87641v4j38.fsf@benfinney.id.au>
	<1190949502.875203.57690@w3g2000hsg.googlegroups.com>
	<5m3p1dFbl98pU1@mid.uni-berlin.de>
	<1190968707.799398.232550@19g2000hsx.googlegroups.com>
	<5m4126FbgjabU1@mid.uni-berlin.de>
	<1190993122.979034.305060@50g2000hsm.googlegroups.com>
	<mailman.1236.1190995515.2658.python-list@python.org>
	<1190997769.002795.59450@57g2000hsv.googlegroups.com>
	<5m4qc2Fbbk19U1@mid.uni-berlin.de>
Message-ID: <1191000394.828693.285210@k79g2000hse.googlegroups.com>

On Sep 28, 10:01 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Fri, 28 Sep 2007 09:42:49 -0700, TheFlyingDutchman wrote:
> > Which of the common languages have higher order functions and what is
> > the syntax?
>
> C, C++, Pascal, Perl, PHP, Ruby have them.  And of course the functional
> languages, most notably Lisp and Scheme as you asked for common languages.
>
> Don't know if C#'s delegates qualify.
>
> Ciao,
>         Marc 'BlackJack' Rintsch

What is the syntax of a higher order function in C, C++ and Pascal?



From JS.Sokrates at googlemail.com  Sun Sep  2 17:57:18 2007
From: JS.Sokrates at googlemail.com (Jonas Schneider)
Date: Sun, 02 Sep 2007 14:57:18 -0700
Subject: Weird gcc errors while installing "MySQL-python" module
Message-ID: <1188770238.595895.288760@r29g2000hsg.googlegroups.com>

Hi guys,

I?m experiencing weird error messages while installing MySQL-python
with easy_install... I have no idea where the errors come from.

Read the whole output at http://pastebin.com/m3859cf40
It?s really a lot...

Someone got ideas?

Greets
Jonas



From paul.nospam at rudin.co.uk  Mon Sep 17 12:49:58 2007
From: paul.nospam at rudin.co.uk (Paul Rudin)
Date: Mon, 17 Sep 2007 17:49:58 +0100
Subject: How to assign a function to another function
References: <mailman.657.1190047202.2658.python-list@python.org>
Message-ID: <87d4whnsnd.fsf@rudin.co.uk>

Stefano Esposito <stefano.esposito87 at gmail.com> writes:

> Hi all
>
> what i'm trying to do is this:
>
>>>>def foo ():
> ...	return None
> ...
>>>>def bar ():
> ...	print "called bar"
> ...
>>>>def assigner ():
> ...	foo = bar
> ...
>>>>assigner()
>>>>foo()
> called bar
>>>>
>
> This piece of code is not working and even trying with...


> ... How can I achieve my goal?


By adding the line:
   global foo
at the beginning of the body of assigner.

The assignment to foo in the body of assigner makes a local (to the
function) variable called foo and assigns bar to it.



From koutoo at hotmail.com  Thu Sep 20 10:34:36 2007
From: koutoo at hotmail.com (koutoo at hotmail.com)
Date: Thu, 20 Sep 2007 07:34:36 -0700
Subject: Lookup values from one table to another based on a value
Message-ID: <1190298876.689060.44540@d55g2000hsg.googlegroups.com>

If I wanted to accomplish looking up values from one table based on a
value from another table or file, how would I go about doing this in
Python?  Would I build a dictionary or an array?

exp:

Table1:

Site = 103
Lane = 2
Dir = ?  # Get this from Table2

Table2:

Site, Lane, Direction,
103, 1, 1
103, 2, 1
103, 3, 5
103, 4, 5

Normally in Access I would just use a Dlookup and be done with it, or
use a Recordset in VB.  Thanks guys.

Kou



From cjt22 at bath.ac.uk  Tue Sep  4 06:52:03 2007
From: cjt22 at bath.ac.uk (cjt22 at bath.ac.uk)
Date: Tue, 04 Sep 2007 03:52:03 -0700
Subject: TypeError: 'module object is not callable'
In-Reply-To: <mailman.19.1188901489.2658.python-list@python.org>
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<mailman.315.1188810174.28954.python-list@python.org>
	<46dbd11e$0$6228$426a74cc@news.free.fr>
	<mailman.317.1188812089.28954.python-list@python.org>
	<1188816626.021956.281040@22g2000hsm.googlegroups.com>
	<5k2cjmF1r2aiU1@mid.uni-berlin.de>
	<1188836008.656284.76160@o80g2000hse.googlegroups.com>
	<46dc6f49$0$6207$426a34cc@news.free.fr>
	<1188900397.459760.259580@k79g2000hse.googlegroups.com>
	<mailman.19.1188901489.2658.python-list@python.org>
Message-ID: <1188903123.701882.205780@o80g2000hse.googlegroups.com>

On Sep 4, 11:24 am, "Amit Khemka" <khemkaa... at gmail.com> wrote:
> On 9/4/07, Chris.T... at jet.uk <Chris.T... at jet.uk> wrote:
>
> > Thanks guys. Changing to how Python does things has a lot of geting
> > used to!
> > Do any of you have any ideas on the best way to do the following
> > problem:
>
> > Each loop I perform, I get a new list of Strings.
> > I then want to print these lists as columns adjacent to each other
> > starting with the first
> > created list in the first column and last created list in the final
> > column.
>
> > If you need any more information, just let me know!
> > Cheers
>
> If I understand correctly what you may want is:
>
> >>> l =  ['1', '2', '3', '4']
>
> you can do:
>
> >>> print "\t".join(l)  # lookup join method in stringmodule,
>
> assuming "\t" as the delimiter
>
> or,
>
> >>> for i in l:
>
> ....     print i, '\t' ,   # note the trailing ","
>
> If this isnotwhat you want, post an example.
>
> Btw, Please post new issues in a separate thread.
>
> Cheers,
> --
> ----
> Amit Khemka
> website:www.onyomo.com
> wap-site:www.owap.in

I think that is very similar to what I want to do.
Say I had lists a = ["1" , "2", "3"]  b = ["4", "5", "6"]  c = ["7",
"8", "9"]
Stored in another list d = [a,b,c]
I want the printed output from d to be of the form:
1   4   7
2   5   8
3   6   9

>From what I am aware, there is no table module to do this. The '\t'
operator looks like it can allow this,
I am playing with it at the moment, although going for my lunch break
now!



From gagsl-py2 at yahoo.com.ar  Wed Sep 26 00:00:10 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 26 Sep 2007 01:00:10 -0300
Subject: Missing documentation for ElementTree?
References: <496954360709251539y2511a1cbnd25c6d3a0d368d2a@mail.gmail.com>
Message-ID: <op.ty8teka0x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 25 Sep 2007 19:39:33 -0300, Robert Dailey <rcdailey at gmail.com>  
escribi?:

> for the _ElementInterface class, there is no documentation for most of  
> the
> members of this class such as .tail and .text. There's a brief  
> description
> of these things on the front page of the ElementTree docs but nothing
> helpful. I have no idea what Tail is vs Text and I wanted to figure this  
> out
> myself, however I don't think I can now. Anyone know if I'm just missing
> something in the documentation or if it really isn't in there?

Start here: http://www.effbot.org/zone/element-index.htm

-- 
Gabriel Genellina



From zowtar at gmail.com  Wed Sep  5 13:21:01 2007
From: zowtar at gmail.com (zowtar)
Date: Wed, 05 Sep 2007 10:21:01 -0700
Subject: python-spidermonkey
Message-ID: <1189012861.893842.87710@k79g2000hse.googlegroups.com>

Guys, I am using slackware... js-spidermonkey 1.5 compiled - OK, Pyrex
installed, but python-spidermonkey don't build...

Screenshot: http://img406.imageshack.us/img406/562/testebp5.png

what is the problem?

zowtar



From lasses_weil at klapptsowieso.net  Thu Sep 13 15:22:41 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Thu, 13 Sep 2007 21:22:41 +0200
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <5ktfb5F5ctrvU1@mid.individual.net>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189604018.520338.162520@57g2000hsv.googlegroups.com>
	<mailman.486.1189693844.2658.python-list@python.org>
	<13eim00ha4lf356@corp.supernews.com>
	<Xns99AA68B097778OKB@199.45.49.11>
	<5ktfb5F5ctrvU1@mid.individual.net>
Message-ID: <46e98e01$0$30383$9b4e6d93@newsspool4.arcor-online.net>

Bjoern Schliessmann wrote:
>> No, but the point being made is that it would be better IN
>> THIS CASE.
> 
> It wouldn't. IMHO, rewriting the code to two or three lines would be
> better.
> 

Well I think Charles' Point about making the equations look like the 
ones in the paper(s) is a pretty good one. That is a special case in 
that the code becomes clearer when it conformes to the standards of the 
domain it is referring to; it is not meant to be understood by itself 
but rather in conjunction with documents that motivate it.

Or in short: Breaking it into n>1 lines would make it more readable but 
would break the connection with the form given in the papers. (Yes, of 
course you can refer to the eq. in a comment but believe me: if you're 
used to seeing a certain (form of) equation, your mind will trip over 
any variation. That is best avoided.)

... my 2 sents, anyway ...
/W


From laurent.pointal at limsi.fr  Tue Sep 18 03:58:22 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Tue, 18 Sep 2007 09:58:22 +0200
Subject: The meaning of  a = b  in object oriented languages
In-Reply-To: <1190094057.976729.285120@n39g2000hsh.googlegroups.com>
References: <1190094057.976729.285120@n39g2000hsh.googlegroups.com>
Message-ID: <fco0ev$hgj$1@news2.u-psud.fr>

Summercool a ?crit :
> 
> 
> The meaning of  a = b  in object oriented languages.
> ====================================================
<zip>

Oups, reading the subject I thought it was a Xah Lee post.


;-)


From Dominic at PLEASEASK.co.uk  Thu Sep  6 07:15:05 2007
From: Dominic at PLEASEASK.co.uk (special_dragonfly)
Date: Thu, 6 Sep 2007 12:15:05 +0100
Subject: SQLite and coercing to Unicode - please help.
References: <46dfcbea$0$89178$7b0f0fd3@mistral.news.newnet.co.uk>
	<mailman.143.1189076279.2658.python-list@python.org>
Message-ID: <46dfdd18$0$89254$7b0f0fd3@mistral.news.newnet.co.uk>

That helped immensely Steve thank you. You're right, this is my first really 
big project ever really, not just in Python.
Just to clarify, my UPDATE statement instead of looking like this:

longstring="UPDATE SecB SET 
currencyCode='"+Values[1]+"',issuerName='"+Values[2] 
"',instrName='"+Values[3]+\
                    "',instrShortName='"+Values[4]+"',instrType='"+Values[5]+"',secCode='"+Values[6]+\
                    "',SEDOL='"+Values[7]+"',Date='"+Values[8]+"',SuspendedState='"+Values[9]+\
                    "',bidPrice='"+Values[10]+"',offerPrice='"+Values[11]+"',midPrice='"+Values[12]+\
                    "',standardMarketSize='"+Values[13]+"',openOrClosed='"+Values[14]+\
                    "' WHERE secBoardId='"+Values[0]+"'"
cursor.execute(longstring)

should instead look more like this:
cursor.execute('UPDATE SecB SET 
(?,?,?,?,?,?,?,?,?,?,?,?,?,?)',tuple(Values[1:])) ?

The Elements list was from a time when it looked less pretty than it does 
now, where I iterated through it and didn't catch errors at all.

Thank you again for your help and when it's finished and working I'll repost 
it online somewhere for ideas on how to optimise it slightly more!
Dominic



"Steve Holden" <steve at holdenweb.com> wrote in message 
news:mailman.143.1189076279.2658.python-list at python.org...
> special_dragonfly wrote:
>> Hello!
>> First, the problem: the program below falls over with the following 
>> error:
>> TypeError: coercing to Unicode: need string or buffer, NoneType found.
>> and gives the following line:
>> "' WHERE secBoardId='"+Values[0]+"'"
>> My first thought was that Values[0] was containing nothing at all, that 
>> would allow a NoneType to be found, but it has data in that position of 
>> the list - you'll see below.
>> So I thought that Values[0] was 'losing' its type somewhere, so I checked 
>> it just by having the program print out type(Values[0]), it says it's a 
>> string - also seen below.
>> So given it's not a NoneType and it's a string, I don't understand why 
>> I'm getting the error. I tried forcing it to a particular type (I think 
>> that's the right word), so I put lines like:
>> Values[0]=unicode(Values[0]) or
>> WHERE ... ='"str(Values[0]+"'"
>> but neither worked.
>> I've put my code below, I'm sorry it's so long, I've commented the line 
>> where it's falling over.
>> If it's useful, I am using Python 2.5.1, ElementTree 1.2.6 and pySQLite 
>> 2.3.5
>> If this is a silly mistake ( one where RTFM is a valid response, can you 
>> point me at the place where I can get the answer please?), otherwise any 
>> help is greatly appreciated as I'm out of ideas. :(
>> Dominic
>>
> OK, the first problem is that you appear to be obsessing about Values[0] 
> when there doesn't appear to be any evidence that value in particular is 
> causing the problem. The line number being reported is simply that of the 
> last line in a single long statement, and the issue could be anywhere in 
> that statement. Sorry, you just have to know (or guess) that, it's not a 
> particularly admirable feature of Python.
>
> In point of fact it is the None values that are causing the problem:
>
> $ /usr/bin/python
> Python 2.5.1 (r251:54863, May 18 2007, 16:56:43)
> [GCC 3.4.4 (cygming special, gdc 0.12, using dmd 0.125)] on cygwin
> Type "help", "copyright", "credits" or "license" for more information.
> >>> "a string"+None
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> TypeError: cannot concatenate 'str' and 'NoneType' objects
> >>> u"a string"+None
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> TypeError: coercing to Unicode: need string or buffer, NoneType found
> >>>
>
> The XML values you are retrieving will be Unicode strings, but you are 
> mixing them with plain string values, hence the (somewhat unhelpful) error 
> message..
>
> Secondly, you are trying to construct a SQL UPDATE statement yourself, 
> instead of parameterising it like you did your INSERT statement. This is 
> also usually asking for trouble, and is vulnerable to SQL injection errors 
> (use Google if you don't know what they are).
>
> Thirdly, I'm not quite sure why you are using a list for the values, and 
> another one for the Elements, when it would seems to make more sense to 
> use a named variable for the former and just use the necessary string 
> literals for the latter. What's the advantage of using
>
>         try:
>             branch=dom.getiterator(Elements[1])
>             Values.append(branch[0].text) # currencyID
>         except:
>             Values.append(" "*3)
>
> when you could just as easily say
>
>         try:
>             branch = dom.getiterator("currencyID")
>             currencyID = branch[0].text
>         except (..., ..., ...): # see below
>             currencyID = "   "
>
> The usual shorthand for
>
>
> (Values[0],Values[1],Values[2],Values[3],Values[4],Values[5],\
> Values[6],Values[7],Values[8],Values[9],Values[10],Values[11],\
>                         Values[12],Values[13],Values[14])
>
> would, by the way, be
>
>         tuple(Values)
>
> Note also that your INSERT statement assumes a specific ordering to the 
> columns, which is asking for trouble when the database goes into 
> production, as a DBA might re-order the fields during a reorganization or 
> restructuring of the data, and then your code will break.
>
> Finally, and almost completely irrelevant to the issue at hand, all those 
> "except" clauses will catch *absolutely any error* that may occur in your 
> code, which is almost always a bad idea, since this behavior will mask 
> certain errors that you really want to know about. The XML analysis code 
> is frankly pretty horrible, but we can address that issue once you start 
> to get some results.
>
> Sorry to bash what could well be your first significant program in Python, 
> but my main interest is in setting you off down the right path. It will 
> save time and grief in the end. Hope this has helped.
>
> regards
>  Steve
>
>>
>> The output:
>> At top of function: GBP/PLUS-ofn-GB00B12T7004
>> Values list contains: ['GBP/PLUS-ofn-GB00B12T7004', u'GBP', 
>> u'GB00B12T7004 ', u'All Star Minerals plc                   ', 'ASMO', 
>> 'DE', 'PLUS', u'B12T700', u'        ', u'A', None, None, None, 
>> '000000000000000000', '0', '0']
>>
>> Type of Values[0] is: <type 'str'>
>>
>> The code:
>> def dealwithSecBRep(text_buffer):
>>     # text_buffer contains a sequential string of xml
>> 
>> Elements=['secBoardId','currencyId','issuerId','secName','secShortName','secClassId',\
>> 
>> 'sectorId','isin','issueDate','inheritedState','bidPrice','offerPrice','midPrice',\
>>               'standardMarketSize','openPrice','closePrice']
>>     Values=[]
>>     dom=get_a_document(text_buffer) # this function returns an xml 
>> document.
>>     branch=dom.getiterator(Elements[0])
>>     Values.append(GetUniqueId(branch[0])) # Combo of secCode and 
>> secBoardId
>>     print "At top of function:",Values[0]
>>     sql=cursor.execute('SELECT*FROM SecB WHERE 
>> secBoardId='+"'"+Values[0]+"'").fetchall()
>>     SQL2=sql
>>     flag=0
>>     if len(sql)>0:
>>         #Prior database exists
>>         try:
>>             branch=dom.getiterator(Elements[1])
>>             Values.append(branch[0].text) # currencyID
>>         except:
>>             value=GetFromDB('currencyCode',text_buffer)
>>             Values.append(value)
>>         try:
>>             branch=dom.getiterator(Elements[2])
>>             Values.append(branch[0].text) # issuerName
>>         except:
>>             value=GetFromDB('issuerName',text_buffer)
>>             Values.append(value)
> [other horrible code elided ...]
>
>>         try:
>>             branch=dom.getiterator(Elements[15])
>> 
>> value=string.ljust(string.rjust(branch[0][0].text,10,"0"),18,"0")
>>             Values.append(branch[0].text) # Stock Close
>>         except:
>>             Values.append("0") # Stock Open
>>         flag=1
>>     if flag==0:
>>         print "Values list contains:",Values,"\n"
>>         print "Type of Values[0] is:",type(Values[0]),"\n"
>>         longstring="UPDATE SecB SET 
>> currencyCode='"+Values[1]+"',issuerName='"+Values[2]+"',instrName='"+Values[3]+\
>> 
>> "',instrShortName='"+Values[4]+"',instrType='"+Values[5]+"',secCode='"+Values[6]+\
>> 
>> "',SEDOL='"+Values[7]+"',Date='"+Values[8]+"',SuspendedState='"+Values[9]+\
>> 
>> "',bidPrice='"+Values[10]+"',offerPrice='"+Values[11]+"',midPrice='"+Values[12]+\
>> 
>> "',standardMarketSize='"+Values[13]+"',openOrClosed='"+Values[14]+\
>>                     "' WHERE secBoardId='"+Values[0]+"'" # This is the 
>> line it falls over on.
>>         cursor.execute(longstring)
>>         connection.commit()
>>         currentStatus=SQL2[0][13] #current Stock Status
>>         if currentStatus==1: # Open
>>             if Values[14]!='0': # xml says open
>>                 oldStart("<secBoardRep>",text_buffer) #5SE
>>             elif Values[15]!='0': # xml says closed
>>                 oldStart("<ClosingRep>",text_buffer)
>>             elif Values[14]==0 and Values[15]==0: # neither openPrice nor 
>> closePrice exist in xml
>>                 oldStart("<secBoardRep2>",text_buffer) # just 5ER and 5IS
>>         else: # currently Closed
>>             if Values[14]!='0': #xml says open
>>                 oldStart("<OpeningRep>",text_buffer) # 5PR
>>             else: #xml says closed
>>                 oldStart("<secBoard2Rep>",text_buffer) # 5ER,5IS
>>     else:
>>         cursor.execute('INSERT INTO SecB VALUES 
>> (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)',\
>> 
>> (Values[0],Values[1],Values[2],Values[3],Values[4],Values[5],\
>> 
>> Values[6],Values[7],Values[8],Values[9],Values[10],Values[11],\
>>                         Values[12],Values[13],Values[14]))
>>         connection.commit()
>>         if Values[14]!='0': # xml says open
>>             test=dom.getiterator('openPrice')
>>             oldStart("<secBoard2Rep>",text_buffer) # 5ER, 5IS
>>             oldStart("<OpeningRep>",text_buffer) # 5PR
>>         else: # xml says closed, or neither options exist.
>>             oldStart("<secBoard2Rep>",text_buffer) # 5ER, 5IS
>>
>>
> -- 
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd           http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
> --------------- Asciimercial ------------------
> Get on the web: Blog, lens and tag the Internet
> Many services currently offer free registration
> ----------- Thank You for Reading -------------
> 




From lasses_weil at klapptsowieso.net  Thu Sep 13 17:50:20 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Thu, 13 Sep 2007 23:50:20 +0200
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <mailman.503.1189715816.2658.python-list@python.org>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>	<1189604018.520338.162520@57g2000hsv.googlegroups.com>	<mailman.486.1189693844.2658.python-list@python.org>	<13eim00ha4lf356@corp.supernews.com>	<Xns99AA68B097778OKB@199.45.49.11>	<5ktfb5F5ctrvU1@mid.individual.net>	<46e98e01$0$30383$9b4e6d93@newsspool4.arcor-online.net>	<46e9921e$0$26251$426a74cc@news.free.fr>	<46e995d1$0$16120$9b4e6d93@newsspool1.arcor-online.net>
	<mailman.503.1189715816.2658.python-list@python.org>
Message-ID: <46e9b09c$0$7685$9b4e6d93@newsspool2.arcor-online.net>

stef mientki wrote:
> Wildemar Wildenburger wrote:
>> Bruno Desthuilliers wrote:
>>  
>>> OTHO, simple math-illeterate programmers like me will have hard time 
>>> maintaining such a code.
>>>     
>> Certainly, but again: Such main people are not the intended audience. 
>> The code is for people that know how to read these equations. I think 
>> a general rule of (any form of) writing is to write with your audience 
>> in mind. I always do that and happily, that audience is usually naked.
>>
>>
>>   
> Wouldn't Mathematica, Maple or MathCad be a far better choice ?
> 
Well, those cost money ...

Hey, why am *I* arguing here at all? This isn't my thread!
Well, I guess the scientist in me felt tickled.

/W


From joemystery123 at gmail.com  Thu Sep 20 19:52:16 2007
From: joemystery123 at gmail.com (crybaby)
Date: Thu, 20 Sep 2007 16:52:16 -0700
Subject: Python Regex Question
In-Reply-To: <46f2c7e8$0$21956$88260bb3@free.teranews.com>
References: <1190316811.760038.145850@50g2000hsm.googlegroups.com>
	<46f2c7e8$0$21956$88260bb3@free.teranews.com>
Message-ID: <1190332336.357719.28060@19g2000hsx.googlegroups.com>

On Sep 20, 4:12 pm, Tobiah <t... at tobiah.org> wrote:
> joemystery... at gmail.com wrote:
> > I need to extract the number on each <td tags from a html file.
>
> > i.e 49.950 from the following:
>
> > <td align=right width=80><font size=2 face="New Times
> > Roman,Times,Serif">&nbsp;49.950&nbsp;</font></td>
>
> > The actual number between: &nbsp;49.950&nbsp; can be any number of
> > digits before decimal and after decimal.
>
> > <td align=right width=80><font size=2 face="New Times
> > Roman,Times,Serif">&nbsp;######.####&nbsp;</font></td>
>
> > How can I just extract the real/integer number using regex?
>
> '[0-9]*\.[0-9]*'
>
> --
> Posted via a free Usenet account fromhttp://www.teranews.com

I am trying to use BeautifulSoup:

    soup = BeautifulSoup(page)

    td_tags = soup.findAll('td')
    i=0
    for td in td_tags:
        i = i+1
        print "td: ", td
        # re.search('[0-9]*\.[0-9]*', td)
        price = re.compile('[0-9]*\.[0-9]*').search(td)

I am getting an error:

           price= re.compile('[0-9]*\.[0-9]*').search(td)
TypeError: expected string or buffer

Does beautiful soup returns array of objects? If so, how do I pass
"td" instance as string to re.search?  What is the different between
re.search vs re.compile().search?



From nick at craig-wood.com  Wed Sep 26 05:30:17 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Wed, 26 Sep 2007 04:30:17 -0500
Subject: Google and Python
References: <1190228512.627109.308910@n39g2000hsh.googlegroups.com>
	<ufadnRC5BPZm6GzbnZ2dnUVZ_jOdnZ2d@comcast.com>
	<1190231094.276099.136250@22g2000hsm.googlegroups.com>
	<mailman.781.1190232163.2658.python-list@python.org>
	<1190235678.019823.315850@o80g2000hse.googlegroups.com>
	<mailman.887.1190402873.2658.python-list@python.org>
	<7xejgr68pm.fsf@ruckus.brouhaha.com>
	<slrnffetai.ijq.nick@irishsea.home.craig-wood.com>
	<mailman.1031.1190705678.2658.python-list@python.org>
	<7xps07w5g3.fsf@ruckus.brouhaha.com>
	<mailman.1088.1190791009.2658.python-list@python.org>
Message-ID: <slrnffk82a.krt.nick@irishsea.home.craig-wood.com>

Hendrik van Rooyen <mail at microcorp.co.za> wrote:
>  "Paul Rubin" <http://lid> wrote:
> 
> > "Hendrik van Rooyen" <m..orp.co.za> writes:
> > > What is the advantage of passing the open file rather than just the
> > > fully qualified file name and having the other process open the
> > > file itself?
> >
> > The idea is that the application is a web server.  The socket listener
> > accepts connections and hands them off to other processes.  That is,
> > the file descriptors are handles on network connections that were
> > opened by the remote client, not disk files that can be opened
> > locally.
> 
>  Ok got it - so instead of starting a thread, as is current practice, you fork
>  a process (possibly on another machine) and "hand over" the client.

It is trivial to pass a socket to a new thread or a forked child - you
don't need this mechanism for that.  It doesn't work on different
machines though - it has to be on the same machine.

It is for passing a socket to an already running process.  For example
you could implement fast cgi like this.

Fast cgi is a process which runs continuously which avoids startup
times and can track more state more easily.

Instead of the client talking to the web server and the web server
taking to the fast cgi process which is what normally happens, the web
server could first writes some headers on the socket then pass the
socket on to the fast cgi process directly, cutting out a whole lot of
copying of the data.

>  Can't you do this by passing the client's IP addy and the negotiated socket
>  on the clients machine?

No, because the state of the open TCP connection is kept in the kernel
not in the user process.

>  Or is this where the heavy lifting comes in? - "spoofing" the original local IP
>  addy on the new server? - seems you would have to route to a local machine
>  based not on IP addy only, but on (IP,socket) tuples.  - This might work if
>  you have only one entry point to the local LAN, but would be harder to do
>  if there are two points of entry, and packets could hit from
>  outside on either..

It is all done in the kernel.  The kernel has the state of the TCP
connection - it is just accessed from a different process.

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


From jcd at sdf.lonestar.org  Sun Sep 16 11:57:55 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Sun, 16 Sep 2007 11:57:55 -0400
Subject: SVG to raster conversion.
Message-ID: <46ED5283.3030004@sdf.lonestar.org>

Does anybody know a good solution (preferably in python) for rasterizing
SVG or other vector graphics.

I'm thinking something like

vector_image = SVGFile(path_to_image)
raster_image = vector_image.rasterize(format, (width, height), dpi)
raster_image.write(out_file)

Thanks for any pointers you might have.


From khemkaamit at gmail.com  Tue Sep  4 06:24:44 2007
From: khemkaamit at gmail.com (Amit Khemka)
Date: Tue, 4 Sep 2007 15:54:44 +0530
Subject: TypeError: 'module object is not callable'
In-Reply-To: <1188900397.459760.259580@k79g2000hse.googlegroups.com>
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<mailman.315.1188810174.28954.python-list@python.org>
	<46dbd11e$0$6228$426a74cc@news.free.fr>
	<mailman.317.1188812089.28954.python-list@python.org>
	<1188816626.021956.281040@22g2000hsm.googlegroups.com>
	<5k2cjmF1r2aiU1@mid.uni-berlin.de>
	<1188836008.656284.76160@o80g2000hse.googlegroups.com>
	<46dc6f49$0$6207$426a34cc@news.free.fr>
	<1188900397.459760.259580@k79g2000hse.googlegroups.com>
Message-ID: <1360b7230709040324t638e9666gc9211132f1d5fae0@mail.gmail.com>

On 9/4/07, Chris.Tidy at jet.uk <Chris.Tidy at jet.uk> wrote:
> Thanks guys. Changing to how Python does things has a lot of geting
> used to!
> Do any of you have any ideas on the best way to do the following
> problem:
>
> Each loop I perform, I get a new list of Strings.
> I then want to print these lists as columns adjacent to each other
> starting with the first
> created list in the first column and last created list in the final
> column.
>
> If you need any more information, just let me know!
> Cheers

If I understand correctly what you may want is:

>>> l =  ['1', '2', '3', '4']

you can do:

>>> print "\t".join(l)  # lookup join method in string module,
assuming "\t" as the delimiter

or,

>>> for i in l:
....     print i, '\t' ,   # note the trailing ","

If this is not what you want, post an example.

Btw, Please post new issues in a separate thread.

Cheers,
-- 
----
Amit Khemka
website: www.onyomo.com
wap-site: www.owap.in


From carsten at uniqsys.com  Mon Sep 24 08:09:21 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 24 Sep 2007 08:09:21 -0400
Subject: sorting a list numbers stored as strings
In-Reply-To: <E4C7BCAB1872014F81CEAACD25699B8C0849A9@301081ANEX2.global.avaya.com>
References: <E4C7BCAB1872014F81CEAACD25699B8C0849A9@301081ANEX2.global.avaya.com>
Message-ID: <1190635761.5618.2.camel@dot.uniqsys.com>

On Mon, 2007-09-24 at 19:58 +0800, Delaney, Timothy (Tim) wrote:
> I'm sure that in some version of Python it would have given a
> ValueError (due to the default radix being 0) but it appears to have
> changed to a default radix of 10 somewhere along the way.

Not even Python 1.5.2 seems to have a problem with leading zeroes:

Python 1.5.2 (#1, Nov  6 1999, 14:53:40) [C] on sco_sv3
Copyright 1991-1995 Stichting Mathematisch Centrum, Amsterdam
>>> int("08")
8

-- 
Carsten Haese
http://informixdb.sourceforge.net




From arkanes at gmail.com  Wed Sep 12 11:49:01 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 12 Sep 2007 10:49:01 -0500
Subject: An ordered dictionary for the Python library?
In-Reply-To: <1189605250.186948.303130@50g2000hsm.googlegroups.com>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<13efnmi4n959a59@corp.supernews.com>
	<1189601205.503841.327170@o80g2000hse.googlegroups.com>
	<1189605250.186948.303130@50g2000hsm.googlegroups.com>
Message-ID: <4866bea60709120849hc0beacfu681ec6b4eff3e235@mail.gmail.com>

On 9/12/07, Mark Summerfield <m.n.summerfield at googlemail.com> wrote:
> On 12 Sep, 13:46, Michele Simionato <michele.simion... at gmail.com>
> wrote:
> > On Sep 12, 2:42 pm, Steven D'Aprano <st... at REMOVE-THIS-
> >
> > cybersource.com.au> wrote:
> > > On Wed, 12 Sep 2007 07:33:45 +0000, Mark Summerfield wrote:
> > > In fact, I'm not sure what people mean by ordered dicts. I assume they
> > > mean the keys are ordered, not the values. But ordered by what? Insertion
> > > order? Modification order? Alphabetical order?
> >
> > Insertion order.
> >
> >  M.S.
>
>
> Actually I meant by key order, so insertion order doesn't matter at
> all. If you need a dictionary-like data structure that respects
> insertion order you could use a list of (key, value) tuples.
>

These sort of disagreements about what such a beast should "obviously"
do are a good part of the reason why one doesn't exist in the standard
library. A sorted dict is so trivial that it's not really seen as
necessary, since all you have to do is sort the keys(). An ordered
dict is generally better satisfied with a list, as you've seen.
There's implementations of all these for people who want something
wrapped up in the cookbook.


>But what happens when I need to do this a *lot* and when the number of
>items is hundreds or a few thousands?

keys = sorted(d.keys())
for k in key:
   ...

You've got two choices: either you insert more than you iterate, in
which case sorting at the point of iteration is the most efficient
option, or you iterate more than you insert, in which case sorting
after you insert is easy. There's no way that an ordered dict
implementation could satisfy both constraints. Can you honestly think
of a use case where the performance of your sorting is a bottleneck
*and* it's a suitably general case that a standard lib class should
optimize for that specific case? Even in this short thread we've seen
3 different ideas of what the dict should do.


From http  Tue Sep 11 23:42:05 2007
From: http (Paul Rubin)
Date: 11 Sep 2007 20:42:05 -0700
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
Message-ID: <7x7imwpn1u.fsf@ruckus.brouhaha.com>

TheFlyingDutchman <zzbbaadd at aol.com> writes:
> Python user and advocate Bruce Eckel is disappointed with the
> additions (or lack of additions) in Python 3:
> 
> http://www.artima.com/weblogs/viewpost.jsp?thread=214112

That article is pretty weak.


From rrr at ronadam.com  Fri Sep 21 18:44:39 2007
From: rrr at ronadam.com (Ron Adam)
Date: Fri, 21 Sep 2007 17:44:39 -0500
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <1190412475.772358.109810@n39g2000hsh.googlegroups.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
Message-ID: <46F44957.6060700@ronadam.com>



Cristian wrote:
> My hope is to subtly reinforce the notion that functions are data
> and can be passed around. The current function declaration doesn't
> help with this. Creating a function and assigning it to a name is
> exactly what Python does, why not have it come out in the syntax? It's
> not necessary, yes, but I think it would be helpful for teaching
> purposes.

I think key may be to discuss names and name binding with your friend.  How 
a name is not the object it self, like a variable is in other languages. 
For example show him how an object can have more than one name.  And discus 
how names can be bound to nearly anything, including classes and functions.


> Again, it's not necessary as much as it's more intuitive and obvious
> what's going on. This helps a beginner sort out the process from the
> syntax without taking it on faith. They can see the class declaration
> and see "I'm defining just another attribute to this class only this
> time it happens to be method".
> 
> There is nothing functionally lacking in Python. I'm just curious if
> there's anything Python can do syntax-wise to help a person better
> grasp programming ideas and Python's inner workings.

You could also discus factory functions with him.  Once he gets that a 
function can return another function, then it won't be so much of a leap 
for a function to take a function as an argument.

Of course he'll figure out all this sooner or later anyway.  You can't be 
an engineer without a fair amount of brain cells committed to processing 
abstract concepts.

Cheers,
   Ron



From brown at esteem.com  Thu Sep  6 19:02:51 2007
From: brown at esteem.com (Tom Brown)
Date: Thu, 6 Sep 2007 16:02:51 -0700
Subject: why should I learn python
In-Reply-To: <87zlzzs9by.fsf@wilson.homeunix.com>
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
	<mailman.189.1189118213.2658.python-list@python.org>
	<87zlzzs9by.fsf@wilson.homeunix.com>
Message-ID: <200709061602.52121.brown@esteem.com>

On Thursday 06 September 2007 15:44, Torsten Bronger wrote:
> Hall?chen!
>
> Tom Brown writes:
> > [...] Python has been by far the easiest to develop in.  Some
> > people might say it is not "real programming" because it is so
> > easy.
>
> I can't believe this.  Have you really heard such a statement?

Yes. I was told this by a C programmer. Something about doing it all yourself 
and not using provided packages. I countered with something about reinventing 
the wheel. :)



From jcd at sdf.lonestar.org  Mon Sep 10 20:24:35 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Mon, 10 Sep 2007 20:24:35 -0400
Subject: question on python syntax
In-Reply-To: <46E5D8F8.1060501@townisp.com>
References: <1189467581.200075.236120@g4g2000hsf.googlegroups.com>
	<46E5D8F8.1060501@townisp.com>
Message-ID: <46E5E043.6000604@sdf.lonestar.org>


Andrew Robert wrote:
> a.m. wrote:
>> If I type this in shell
>>
>> $ ./yourfile.py 12:34 PM &
>>
>> What does '$', '.', '/' and '& means in this succession? Note:
>> 12:34 PM is a argument to the yourfile.py.
>>
>
> This not python syntax but Unix shell.
>
> $             = shell prompt ./            = look for the program
> in my current working directory yourfile.py   = the program name
> 12:34         = argument 1 PM            = argument 2 &
> = run in background
And just to be perfectly clear, you don't type the $.  It's already
there for you, in some form; your prompt may not be a $.

Cheers,
Cliff

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From pavlovevidence at gmail.com  Wed Sep 12 16:52:54 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Wed, 12 Sep 2007 13:52:54 -0700
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <1i4bnbp.1l8sr3mjdojghN%aleax@mac.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189604018.520338.162520@57g2000hsv.googlegroups.com>
	<46e7f450$0$12305$426a74cc@news.free.fr>
	<1189608231.151112.147550@y42g2000hsy.googlegroups.com>
	<mailman.444.1189611299.2658.python-list@python.org>
	<1i4bnbp.1l8sr3mjdojghN%aleax@mac.com>
Message-ID: <1189630374.506503.190690@r34g2000hsd.googlegroups.com>

On Sep 12, 1:05 pm, al... at mac.com (Alex Martelli) wrote:
> Making, say, 'a' hiddenly mean 'x.a', within a function, requires a
> decorator that suitably rewrites the function's bytecode... (after
> which, it WOULD still be terrible and horrible and not to be used, just
> as you say, but it might at least _work_;-).  Main problem is, the
> decorator needs to know the set of names to be "faked out" in this
> terrible and horrible way at the time the 'def' statement executes: it
> can't wait until runtime (to dynamically determine what's in var(self))
> before it rewrites the bytecode (well, I guess you _could_ arrange a
> complicated system to do that, but it _would_ be ridiculously slow).


How about this?  The decorator could generate a bytecode wrapper that
would have the following behavior, where __setlocal__ and
__execute_function__ are special forms that are not possible in
Python.  (The loops would necessarily be unwrapped in the actual
bytecode.)


for sym in sys._getframe(0).f_code.co_varnames:
    if sym == "self":
        continue
    try:
         __setlocal__(sym,getattr(self,sym))
    except AttributeError:
         pass
try:
    __execute_function__()
finally:
    for sym,val in locals.iteritems():
        if sym == "self":
            continue
        if sym in self:
            setattr(self,sym,val)


This wouldn't be that much slower than just assigning local variables
to locals by hand, and it would allow assignments in the
straightforward way as well.

There'd be some gotchas, so extra care is required, but it seems like
for the OP's particular use case of a complex math calculation script,
it would be a decent solution.

I understand where the OP is coming from.  I've done flight
simulations in Java where there are lot of complex calculations using
symbols.  This is a typical formula (drag force calculation) that I
would NOT want to have to use self.xxx for:

FX_wind = -0.5 * rho * Vsq * Sref * (C_D_0 + C_D_alphasq*alpha*alpha +
C_D_esq*e*e)

Even if I'd habitually used "this." in Java, I'd probably skip it in
functions like htis.


Carl Banks



From michele.simionato at gmail.com  Wed Sep 12 10:04:03 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Wed, 12 Sep 2007 14:04:03 -0000
Subject: An ordered dictionary for the Python library?
In-Reply-To: <1189605250.186948.303130@50g2000hsm.googlegroups.com>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<13efnmi4n959a59@corp.supernews.com>
	<1189601205.503841.327170@o80g2000hse.googlegroups.com>
	<1189605250.186948.303130@50g2000hsm.googlegroups.com>
Message-ID: <1189605843.866907.117370@w3g2000hsg.googlegroups.com>

On Sep 12, 3:54 pm, Mark Summerfield <m.n.summerfi... at googlemail.com>
wrote:
> On 12 Sep, 13:46, Michele Simionato <michele.simion... at gmail.com>
>
> Actually I meant by key order, so insertion order doesn't matter at
> all. If you need a dictionary-like data structure that respects
> insertion order you could use a list of (key, value) tuples.
>
> Another respondent asked about use cases.
>
> I have found time and again that I needed (key, value) pairs where the
> key is some string that provides a representation for human readers
> and the value is some internal key (e.g., database ID) that the system
> uses internally. In these cases I often need to present the user with
> a list of items from which to choose and want to present them in
> sorted order. Naturally, I could use an ordinary dict and then do
> this:
>
> for string in sorted(d.keys()):
>     process(string)
>
> But what happens when I need to do this a *lot* and when the number of
> items is hundreds or a few thousands? I'm having to sort again and
> again, since it is often the case that the items in the list changes
> during the runtime of the application. So my solution in C++ is to use
> an ordered dictionary (a map in C++ jargon), which in Python means I
> can simply write:
>
> for string in od.keys():
>     process(string)
>

For your use case I would wrap a list [(key, value)] with a dict-like
object and I would use the bisect module in the standard library to
keep
the inner list ordered.

 M.S.



From iclark at mail.ewu.edu  Thu Sep  6 14:30:14 2007
From: iclark at mail.ewu.edu (Ian Clark)
Date: Thu, 06 Sep 2007 11:30:14 -0700
Subject: Getting original working directory
In-Reply-To: <12.1809-14479-787046656-1189102077@seznam.cz>
References: <1189092734.750184.317490@y42g2000hsy.googlegroups.com>
	<12.1809-14479-787046656-1189102077@seznam.cz>
Message-ID: <fbpgvn$sa6$1@sea.gmane.org>

rave247 rave247 wrote:
> "......the *original* directory location *after* os.chdir() is performed......" os.getcwd() is not helping much as it returns the location that was set up in os.chdir() call
> 
> Thanks

Your question is akin to having a name X that is bound to some value, 
setting it to 2 and then wanting to know what the original value is. It 
just ain't gonna happen.

Simply follow the advice given by Gary and use os.getcwd() *before* the 
call to os.chdir().

Ian



From jstucklex at attglobal.net  Sun Sep 30 15:49:35 2007
From: jstucklex at attglobal.net (Jerry Stuckle)
Date: Sun, 30 Sep 2007 15:49:35 -0400
Subject: which language allows you to change an argument's value?
In-Reply-To: <ooRLi.10072$ZA.6664@newsb.telia.net>
References: <1191149233.346818.246170@22g2000hsm.googlegroups.com>
	<f891e9884d1151a8d46e8be15e43b788@ruby-forum.com>
	<1191170989.227928.252880@g4g2000hsf.googlegroups.com>
	<ooRLi.10072$ZA.6664@newsb.telia.net>
Message-ID: <ismdnVHwFc7pY2LbnZ2dnUVZ_smnnZ2d@comcast.com>

Erik Wikstr?m wrote:
> On 2007-09-30 18:49, Summercool wrote:
>> On Sep 30, 4:18 am, 7stud -- <dol... at excite.com> wrote:
>>> SpringFlowers AutumnMoon wrote:
>>>> we have no way
>>>> of knowing what we pass in could get changed.
>>> Sure you do.  You look at the function's signature.  In order to use
>>> someone else's library, you have to know the function's signature.  And
>>> the signature explicitly tells you whether the value you pass in could
>>> be changed.
>> do you mean in C++?  I tried to find signature in two C++ books and it
>> is not there.  Google has a few results but it looks something like
>> prototype.  Is signature the same as the function prototype in the .h
>> file?
> 
> A signature is what is required to identify a function and includes
> return type, name of function and the types of the parameters, while it
> looks just like a prototype it is not. A prototype is something you
> write to satisfy your compiler while a signature identifies a function.
> Below are some examples of signatures, only the last can modify the
> values of its parameter.
>

No, the function's signature does not include the return type.

>   void foo(int, float)
>   std::string bar(const std::string&, int, int)
>   void baz(std::string&)
> 

Actually, these are prototypes.  The signature is what's passed onto the 
linker - perhaps something like "?foo@@YAXHM at Z".  It's also generally 
compiler dependent for C++ mangled names.

Also, I should clarify - the C++ function signature includes parameter 
information.  The C function signature is only dependent on the function 
name and is almost always the name preceded by an underscore).

You can see the function signatures in a map file if you leave the names 
mangled.
.
>> If so, don't we usually just include <___.h> and forget about
>> the rest.  Documentation is fine although in some situation, the
>> descriptions is 2 lines, and notes and warnings are 4, 5 times that,
>> and the users' discussing it, holding different opinion is again 2, 3
>> times of that length.
> 
> Unless you read the documentation how do you know which files to
> include? And what documentation are you reading which does not clearly
> specify the functionality of the functions described?
>

Exactly.


-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex at attglobal.net
==================


From kishore at mindriver-it.com  Wed Sep 26 04:19:58 2007
From: kishore at mindriver-it.com (kishore at mindriver-it.com)
Date: Wed, 26 Sep 2007 13:49:58 +0530
Subject: Python-list Digest, Vol 48, Issue 391
In-Reply-To: <mailman.3754.1190793906.2656.python-list@python.org>
Message-ID: <20070926081642.C27CE1E4009@bag.python.org>

Hi 

 

 

 

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From trekker182 at gmail.com  Sat Sep 15 19:52:47 2007
From: trekker182 at gmail.com (Shawn Minisall)
Date: Sat, 15 Sep 2007 19:52:47 -0400
Subject: string questions
Message-ID: <46EC704F.5000101@gmail.com>

Hi everyone, I'm a beginning programming student in Python and have a 
few questions regarding strings.

If s1 = "spam"

If s2 = "ni!"

1. Would string.ljust(string.upper(s2),4) * 3 start it at the left 
margin and move it 12 spaces to the right because of the 4 *3?  If so, 
why is it in the parathesis for the upper command and not the ljust?   I 
already know that it would cap it to NI!

2.  To get the output "Spam Ni! Spam Ni! Spam Ni!" I could do something 
like this string.join ([s1, s2]),

But I'm a little lost how to get it repeated three times on one line.  
Would I  just have to put the same command on the next two lines?

3. To change spam to spm, the string.replace seems to be the best 
function to use.  However, when I use
string.replace(s1, "a", " ") in python to replace a with an empty space, 
it doesn't work...I just get spam back when I print s1.   Any ideas?

Thanks.

-Shawn




From http  Fri Sep 28 11:51:41 2007
From: http (Paul Rubin)
Date: 28 Sep 2007 08:51:41 -0700
Subject: Python 3.0 migration plans?
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>
	<87641v4j38.fsf@benfinney.id.au>
	<1190949502.875203.57690@w3g2000hsg.googlegroups.com>
	<5m3p1dFbl98pU1@mid.uni-berlin.de>
	<1190968707.799398.232550@19g2000hsx.googlegroups.com>
	<5m4126FbgjabU1@mid.uni-berlin.de>
Message-ID: <7x3awyu6sy.fsf@ruckus.brouhaha.com>

"Diez B. Roggisch" <deets at nospam.web.de> writes:
> All serious languages are turing-complete. So can we put away with this
> non-sense argument right away, please?

Actually the so called "total" languages aren't Turing-complete.  I
think Coq is an example: every Coq function must return a value.  So
Coq doesn't have any way to write an infinite loop, because that would
allow writing functions that fail to return.  So there is no halting
program in Coq (every Coq program halts), which means Coq is not
Turing-complete.  That allows Coq to generate code about which it can
make all kinds of guarantees that most languages can't (not simply
that the programs halt but that they actually fulfill their
computational specifications), so it's being used in various
high-assurance applications, though usually to write just the most
critical parts of a program, not the entire program.  Of course it's a
matter of semantics but in some meaningful ways, I'd say Coq is a more
serious language than Python.

Here is a famous early paper explaining why Turing-completeness isn't
all it's cracked up to be:

  http://sblp2004.ic.uff.br/papers/turner.pdf
 
This paper shows some of the advantages of the total approach.


From xkenneth at gmail.com  Wed Sep 12 15:52:40 2007
From: xkenneth at gmail.com (xkenneth)
Date: Wed, 12 Sep 2007 12:52:40 -0700
Subject: xml question
In-Reply-To: <mailman.451.1189624890.2658.python-list@python.org>
References: <mailman.451.1189624890.2658.python-list@python.org>
Message-ID: <1189626760.269992.252160@g4g2000hsf.googlegroups.com>

There are built in tools for the DOM in Python. Also I'm using OSX to
do XML parsing but I'm using the tools available from 4suite.

On Sep 12, 2:21 pm, JYOUN... at kc.rr.com wrote:
> Just curious if there's any python xml parsing tools built into the Mac (OS 10.4.10 Tiger)?  If so,
> could anyone
> share some simple code (or maybe point me to a web-site) of how to parse xml data from a
> file?  For example,  if I
> had a file that contained this:
>
>                 <colors>
>                         <color base="DeviceGray" />
>                         <color alt="DeviceCMYK" base="Separation">Black</color>
>                         <color alt="Lab" base="Separation">Light Blue</color>
>                         <color alt="ICCBased" base="Separation">Green</color>
>                 </colors>
>
> I'd want to look in the 'colors' xml element, then look at each 'color' xml element inside and
> pull any that have
> values (which would be Black, Light Blue and Green).  I'd like to know how to pull 'attributes'
> too.
>
> Thanks very much for your help.
>
> Jay




From prudek at bvx.cz  Tue Sep 11 07:00:32 2007
From: prudek at bvx.cz (Milos Prudek)
Date: Tue, 11 Sep 2007 13:00:32 +0200
Subject: zlib
In-Reply-To: <fc4nu1$sf1$1@lust.ihug.co.nz>
References: <mailman.320.1189432817.2658.python-list@python.org>
	<fc4nu1$sf1$1@lust.ihug.co.nz>
Message-ID: <200709111300.32633.prudek@bvx.cz>

> > Although I have Python 2.5 with zlib in my Linux disto, I need to install
> > my own Python (as most Zope developers do).
>
> Why?

Because Zope often requires Python version slightly older than the most 
current one.

> So why does your own Python version have to be 2.4.4?

Because "Plone 3.0 requires Zope 2.10.4 and Python 2.4.4", as you can see on 
plone.org.


-- 
Milos Prudek


From ldo at geek-central.gen.new_zealand  Thu Sep 27 00:53:43 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Thu, 27 Sep 2007 16:53:43 +1200
Subject: ~ bit-wise unary operator
References: <mailman.1138.1190844872.2658.python-list@python.org>
	<87r6klm5fk.fsf@mulj.homelinux.net>
Message-ID: <fdfd0n$vt7$1@lust.ihug.co.nz>

In message <87r6klm5fk.fsf at mulj.homelinux.net>, Hrvoje Niksic wrote:

> If you want 16-bit unsigned arithmetic, use 2**16 + ~a, which yields
> 57557.

Or why not use "0xffff ^ a", which returns the same thing.


From david at asdf.asdf  Tue Sep 11 22:34:58 2007
From: david at asdf.asdf (bambam)
Date: Wed, 12 Sep 2007 12:34:58 +1000
Subject: function to do dynamic import?
References: <13ecb84p1ghrd64@corp.supernews.com>
	<mailman.378.1189513496.2658.python-list@python.org>
Message-ID: <13eek2h7lcikm5b@corp.supernews.com>


"Steve Holden" <steve at holdenweb.com> wrote in message 
news:mailman.378.1189513496.2658.python-list at python.org...
> bambam wrote:
>> import works in the main section of the module, but does
>> not work as I hoped when run inside a function.
>>
>> That is, the modules import correctly, but are not visible to
>> the enclosing (global) scope.
>>
>> Questions:
>> (1) Where can I read an explanation of this?
>> (2) Is there a work around?
>>
>> BTW, sys.modules("filename") shows that the module is
>> loaded, I just don't know how to use it when loaded that
>> way.  Also, if I import again at the global scope, the module
>> name becomes available.
>>
> There's not much wrong with doing this, since it gives you the best of 
> both worlds. But you mean sys.modules["filename"], don't you?
>
>>>>> def gim():
>> ... exec "import gamel"
>> ...
>>>>> gim()
>>>>> sys.modules["gamel"]
>> <module 'gamel' from 'c:\gamel.pyc'>
>>>>> gamel
>> NameError: name 'gamel' is not defined
>>>>> exec "import gamel"
>>>>> gamel
>> <module 'gamel' from 'c:\gamel.pyc'>
> Whoa there! There's a lot of difference between "importing a module inside 
> a function" and "executing an import statement inside a function".
>
> If you want to do dynamic imports then the __import__ function is what you 
> need. Trying to use exec like that is a bad idea unless you clearly 
> understand the relationship between the different namespaces involved. In 
> fact, trying to use exec at all is a bad idea until you understand Python 
> better, and even then it's not often a terrific idea.
>
> Think of exec more as a hack of last resort than the first tool to reach 
> for to solve a problem.
>
> regards
>  Steve
> -- 
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd           http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
> --------------- Asciimercial ------------------
> Get on the web: Blog, lens and tag the Internet
> Many services currently offer free registration
> ----------- Thank You for Reading -------------
>

Yes, sys.modules["filename"], unfortunately, same mistake
made already 4 or 5 times before I typed this, and still hadn't
learned...many years working in an environment where the
distinction was not important. Sorry.

def gim(self):
    for gamel in self.gamel_list:
        __import__(gamel['file'])

Works as hoped for. I did a web search for 'dynamic import' and
the only examples I found used exec.

Thanks

Steve. 




From aine_canby at yahoo.com  Thu Sep 27 09:03:41 2007
From: aine_canby at yahoo.com (aine_canby at yahoo.com)
Date: Thu, 27 Sep 2007 06:03:41 -0700
Subject: Confusion regarding constructor as default value
Message-ID: <1190898221.833936.40480@57g2000hsv.googlegroups.com>

Why are the following different?

def AddRow(self, rowName, tableRow=TableRow(ReleaseDate(""),
ExpiryDate(""))):
		# check to see if the row already exists, if not add it to the
container

		if not self.dict.has_key(rowName):
			self.dict[rowName] = tableRow

def AddRow(self, rowName, tableRow):
		# check to see if the row already exists, if not add it to the
container

		if not self.dict.has_key(rowName):
			self.dict[rowName] = TableRow(ReleaseDate(""), ExpiryDate(""))

It seems that when I use the first function that I'm getting duplicate
objects in self.dict

Thanks for your help,

Aine.



From kay.schluehr at gmx.net  Sun Sep 16 07:11:40 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Sun, 16 Sep 2007 04:11:40 -0700
Subject: Needless copying in iterations?
In-Reply-To: <13epv3fnb6bak15@corp.supernews.com>
References: <fchk59$mm3$1@daisy.noc.ucla.edu>
	<5l3ab6F5v20uU3@mid.uni-berlin.de>
	<13eourdrne86e61@corp.supernews.com>
	<874phv42to.fsf@benfinney.id.au>
	<13epv3fnb6bak15@corp.supernews.com>
Message-ID: <1189941100.385721.45300@g4g2000hsf.googlegroups.com>

> Haskell is a dynamic language, and there are optimizing compilers for it.

Last time I used Haskell it was statically typed but this has been
almost a year ago and times are changing fast.

About optimizing compilers for Python. These won't work without
restrictions a la Shedskin which uses C++ as its backend. But unlike
Shedskin and the design mistake being made in this project we can
learn the lesson from Psyco that there must be a fallback to bytecode
interpretation when some argument does not fit the signature of a
specialized function. I'm personally a bit skeptical about JIT
compilation since I feel it's a waste of electric currency to start
recording all the information at runtime and perform native
compilations again and again. It doesn't mean that JIT compilation
can't be effective. I have a conceptual bias against it.

Instead I expect a rather stable behaviour and rather fixed nominal
types despite the fact that Python supports duck-typing. Unfortunately
I'm unable to recover an investigation about the effectiveness of
adding tests to a rather well equipped testbase. The result was one of
"declining profits". Stable behaviour emerged early with good coverage
properties. Than one had to work hard to improve and find more bugs. A
similar effect might also cause the effectiveness of dynamic typing
for catching errors which is not easy to justify by purely theoretical
arguments.

-----

Note that I worked out some pieces of a type feedback mechanism that
records types and displays the results in a slightly modified Python
dialect called TPython. A TPython program can be regarded as a "typed
hypothesis" about an otherwise untyped ( or dynamically typed ) Python
program. You can keep the TPython program and translate it completely
or fragments of it to other languages like C++, D, Java, OCaml etc.
Obviously this approach shall be used for incremental progress and
smooth integration and it might work even when only small portions can
be translated ( typically functions that keep and return only integers/
floats which are bound in range are a good start ). So far everything
is implemented in pure Python and the amount of source is < 1000 LOC.

I have not published anything of it yet and i'm a rather slow
publisher anyway. If anyone is interested in this kind of work and
willing to contribute i might set it aside from the usual EasyExtend
stuff ( which is the foundation nevertheless ) I'm working on and
reframe the project context e.g. on Sourceforge or elsewhere. Email
address and project page are still

kay at fiber-space.de
www.fiber-space.de

If no one contributes the fun is exclusively on my side and everything
is moving slower. That's all.



From steve at holdenweb.com  Fri Sep  7 15:19:12 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 07 Sep 2007 12:19:12 -0700
Subject: unexpected behavior: did i create a pointer?
In-Reply-To: <13e2jdobu2kqkf1@corp.supernews.com>
References: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>	<46e11dfe$0$4517$9b4e6d93@newsspool3.arcor-online.net>	<pan.2007.09.07.10.40.46@REMOVE.THIS.cybersource.com.au>	<fbrdsm$5f3$01$1@news.t-online.com>
	<13e2jdobu2kqkf1@corp.supernews.com>
Message-ID: <fbs87g$hf$1@sea.gmane.org>

Grant Edwards wrote:
> On 2007-09-07, Peter Otten <__peter__ at web.de> wrote:
>> Am Fri, 07 Sep 2007 10:40:47 +0000 schrieb Steven D'Aprano:
>>
>>> Python doesn't have any pointers.
>> Thinking of python variables or "names" as pointers should
>> get you a long way when trying to understand python's behaviour.
> 
> But thinking of them as names bound to objects will get you
> further (and get you there faster). ;)
> 
True.

Since it's only a matter of time before someone brings up the "post-It" 
analogy, let me cavil in advance about it. The thing I don't like about 
that particular pedagogic mechanism is that it always "attaches" the 
names to the objects.

To me that blurs the fact that the names live strictly inside 
namespaces, and are destroyed (along with the references they make to 
other objects) when the namespace goes out of scope or otherwise ceases 
to exist (instance destruction being the obvious one).

I only mention this because I too can be a pedantic little bugger when I 
want to be. Have a nice day.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From bignose+hates-spam at benfinney.id.au  Mon Sep 10 20:34:16 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 11 Sep 2007 10:34:16 +1000
Subject: Question about PEP 8
References: <mailman.333.1189442375.2658.python-list@python.org>
Message-ID: <877imy9h13.fsf@benfinney.id.au>

Laszlo Nagy <gandalf at shopzeus.com> writes:

> Here is my problem. There is ConfigParser, StringIO, Queue,
> HTMLParser etc. They are all part of the standard library.

Yes, many modules in the standard library don't conform to PEP 8;
 these are known bugs.

> Most of these are modules with only a "main class"
> defined. ConfigParser module contains ConfigParser class, Queue
> module contains Queue class etc. Should I use CapWords for the
> module (and file) name or not?

Since that's what it's called, you can't reasonably avoid it.

> E.g. should I
> from mess.wxmegaeidgets.GenericDialog import GenericDialog
>
> or
> from mess.wxmegaeidgets.genericdialog import GenericDialog

Have you tried either of these? Use the one that works.

> (suppose that the module contains only the GenericDialog class. BTW,
> will Py3K change the standard library names in order to follow PEP
> 8?)

There is a distinct "clean up the standard library" project; I can't
recall if it is intended to be part of Py3k.

> Great, but what if I subclass wx widgets? They all have
> CapWords. (wx.Window.ShowModal, wx.Window.Bind etc.) I must use
> CapitalizedWords for method names because sometimes I have to override
> inherited methods, and it is not possible to change their name. Where
> should be the limit?

PEP 8 can't retroactively change the code you're importing. It's a
guideline for code that *you* write; i.e. when you write a new module,
or a new class or function, follow the guidelines.

Existing code is how it is, and a lot of code is already written that
relies on the names in e.g. wxWidgets. Only a backwards-imcompatible
upgrade (such as Py3k) can hope to remove those non-conformant names.

> If I create a composite widget then should I use
> lowercase and underscores?

If it's a class, use TitleCase; if it's an instance or a function, use
lower_case. If it *must* be the same name as something else
(e.g. you're overriding an existing inherited function), you have no
choice but to name it whatever the original is named.

> If I create a class that is not itself a widget, but works with
> widgets? The PEP defines the "theoretically good" coding style, but
> what is the correct style in an environment where you have third
> party libraries that are not following the PEP?

Follow PEP 8 for your code. Grit your teeth and use the non-standard
conventions of third-party libraries, until such time as they are
(backward-incompatibly) changed to be compliant.

-- 
 \     "Don't be afraid of missing opportunities. Behind every failure |
  `\      is an opportunity somebody wishes they had missed."  -- Jane |
_o__)                                          Wagner, via Lily Tomlin |
Ben Finney


From deets at nospam.web.de  Mon Sep  3 05:04:41 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 03 Sep 2007 11:04:41 +0200
Subject: ShowMeDo.com Announces Winner of Most-Video-Plays of the Month
References: <mailman.314.1188809660.28954.python-list@python.org>
Message-ID: <5k2119F1p42tU1@mid.uni-berlin.de>

Jeff Rush wrote:

> ShowMeDo.com, a website offering over 361 instructional screencasts about
> topics both Python and non-Python, has announced their first winner of the
> month for the most-played video.  And the winner is:
> 
>      "Learn Django: Create a Wiki in 20 minutes"
> 
> by Siddharta Govindaraj, founder of Silver Stripe Software, with 1851
> views in
> August, far outpacing the second-place entry.  The prize is a ?20 (UK)
> voucher
> to Amazon.  Congratulations, Siddhi!  You can watch it at:
> 
>   http://showmedo.com/videos/video?name=1100000&fromSeriesID=110
> 
> Siddhi is also helping Doug Napoleone with PyCon this year, providing a
> program for generating attendee badges and working to integrate it into
> the Django-based conference site.
> 
> You can find Siddhi at:
> 
>     http://siddhi.blogspot.com/
>     http://www.silverstripesoftware.com/
> 
> So who will win this month?  It could be you!  How about a screencast
> showcasing a different web framework like TurboGears or Twisted Web?  Or
> something about databases, either relational or object.

Great work. I just have one small remark: given the increasing amount of
spam in the NG/ML that reads "go bla.com to learn everything about ...", I
was at first convinced that your post was one amongst these.

Maybe a subject line that shows somewhat more python context would be a good
idea? Just a suggestion.

Diez


From deets at nospam.web.de  Mon Sep 24 02:47:27 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 24 Sep 2007 08:47:27 +0200
Subject: building a GUI
In-Reply-To: <mailman.955.1190584809.2658.python-list@python.org>
References: <1190557293.266783.251480@y42g2000hsy.googlegroups.com>	<5lnp2rF90pqqU1@mid.uni-berlin.de>	<46F6CB6C.3050609@gmail.com>	<200709232234.54500.phil@riverbankcomputing.co.uk>
	<mailman.955.1190584809.2658.python-list@python.org>
Message-ID: <5lp4t1F99rmfU1@mid.uni-berlin.de>

stef mientki schrieb:
> Phil Thompson wrote:
>> On Sunday 23 September 2007, stef mientki wrote:
>>  
>>> Diez B. Roggisch wrote:
>>>    
>>>> stef mientki schrieb:
>>>>      
>>>>> Thomas Dybdahl Ahle wrote:
>>>>>        
>>>>>> Den Sun, 23 Sep 2007 17:28:38 +0200 skrev stef mientki:
>>>>>>          
>>>>>>> yadin wrote:
>>>>>>>            
>>>>>>>> if i were up to make a GUI chich are the advantages of choosing
>>>>>>>> python over matlab or java?
>>>>>>>>               
>>>>>>> The best is Delphi,
>>>>>>> second is VB,
>>>>>>>             
>>>>>> That sounds mostly like a personal preference :)
>>>>>>           
>>>>> Well I prefer Python ( because of it's OS-independancy and it's open
>>>>> source),
>>>>> but Python is really (still) much worse for GUI designs.
>>>>> Just compare some parameters like:
>>>>> - ease of use
>>>>> - speed of development
>>>>> - support of features
>>>>> - availability of libraries
>>>>> - documentation
>>>>>         
>>>> Sounds like PyQt for me. Best GUI-designer I know, tremendous speed in
>>>> development, giant sized lib that does all kinds of stuff & is
>>>> brilliantly designed + professional grade docus.
>>>>       
>>> Could well be,
>>> but I never looked at PyQt seriously,
>>> because of their weird license.
>>>     
>>
>> It's not weird. It's either GPL or proprietary. Your choice. That's as 
>> complicated as it gets.
>>   
> This is what I find "weird":
> == quote ==
> Trolltech's commercial license terms do not allow you to start 
> developing proprietary software using the Open Source edition.
> == end quote ==
> Stef

At least you do have the option to develop FOSS-software with it without 
prior buying it. Delpi you _have_ to by. Now what's more weird?

Diez


From robert.kern at gmail.com  Sat Sep 22 21:06:58 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 22 Sep 2007 20:06:58 -0500
Subject: Odd files; just left behind?
In-Reply-To: <46F52681.5090409@jessikat.plus.net>
References: <mailman.760.1190205969.2658.python-list@python.org>	<878x725ts7.fsf@pobox.com>	<46F191DF.7000908@jessikat.plus.net>	<46f2bd9b$0$20143$426a74cc@news.free.fr>	<46F38FBC.7090903@chamonix.reportlab.co.uk>	<mailman.879.1190397963.2658.python-list@python.org>
	<46F52681.5090409@jessikat.plus.net>
Message-ID: <fd4e7j$b1j$1@sea.gmane.org>

Robin Becker wrote:
> Robert Kern wrote:
> .......
>> They're a cache.
> 
> they're actually the files that get used by the installed extension in 
> this case (MySQLdb).

Yes. They are extracted from the zipfile at runtime and left there so they don't
have to be extracted again. That's why I called it a cache. I didn't mean
anything else by the term.

> ..........
>>> it would seem simpler to have the .so files inside the site-packages and there's 
>>> the question of why this folder has to be obfuscated (name starts with .). Even 
>>> if these files are "resources" why should they be assumed to belong to the user?
>> Because they are unpacked at runtime by the user that imported the module.
>> Usually, they won't have write access to site-packages.
> 
> in this particular case the python being used was installed with a user 
> prefix eg /myhome/PYTHON so everything belongs to the user; extensions 
> installed by the same user can surely be installed in those folders. 
> Upon checking I find that the same installs which produced the 
> ~/.python-eggs files also managed to put  the eggs like 
> MySQL_python-1.2.2-py2.3-freebsd-6.1-SECURITY-i386.egg inside the 
> various site-packages directories.
> 
> I see no reason why the binary resources shouldn't be unpacked to 
> site-packages at install time.

Then do so: Use the -Z argument to easy_install such that it always unpacks the
zip file. If you don't, then the egg will be left zipped, and the resources
extracted at runtime. Zipped eggs have benefits over the unzipped eggs in that
they decrease the amount of import overhead of having many items in your sys.path.

-- 
Robert Kern

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



From yosuke at ccwf.cc.utexas.edu  Mon Sep  3 15:47:55 2007
From: yosuke at ccwf.cc.utexas.edu (yosuke at ccwf.cc.utexas.edu)
Date: Mon, 3 Sep 2007 19:47:55 +0000 (UTC)
Subject: trap setting attribute when the attribute is dict
References: <fbhi38$3rg$1@geraldo.cc.utexas.edu>
	<1188845236.417709.307160@50g2000hsm.googlegroups.com>
Message-ID: <fbhodb$5uv$1@geraldo.cc.utexas.edu>

Arnaud Delobelle <arnodel at googlemail.com> wrote:
> On Sep 3, 7:00 pm, <yos... at ccwf.cc.utexas.edu> wrote:
>>
>> I want to do something like this.  My class/instance has a dict as a
>> property.  I want the instance to catch the change in the dict (change
>> in some values, addition/deletion of key/value etc) to be recognized by
>> the class instance.  
>>
>> How can I do this?  Any suggestions are very well appreciated.
>>
>> Here is an example of what I want my class to behave:
>>
>> class test(object):
>>         def __init__(self):
>>                 self._d = {}
>>                 self._changed = False
>>         def getd(self):
>>                 print 'called getd'
>>                 return self._d
>>         # dont know what to do next
>>         def setd(self,val):
>>                 print 'called setd', key, val
>>                 self._d[key] = val

> Where does the 'key' come from?  Perhaps you need to look further into
> how properties work.

This obviously doesn't work...

>>                 self._changed = True
>>         d = property(getd,setd,None,None)
>>
>>         def getc(self):
>>                 return self._changed
>>         changed = property(getc,None,None,None)
>>
>> if __name__ == '__main__':
>>         obj = test()
>>         print 'obj.changed = ', obj.changed
>>         print
>>
>>         # I want obj to know that its propety d being changed here
>>         print "t.d['a'] = 1"
>>         obj.d['a'] = 1
>>         print
>>
>>         # I want the "changed" property to be True
>>         print 'obj.changed = ', obj.changed
>>

> You can't do that with plain dicts, and I'm not sure it is often a
> good idea.  However you could create a class that behaves like a dict
> but calls a function each time an item is set, e.g. (made up
> terminology):

>>>> class TriggerDict(object):
> ...     def __init__(self, trigger, val=None):
> ...             self.trigger = trigger
> ...             self.dict_ = val or {}
> ...     def __setitem__(self, key, val):
> ...             self.trigger(self, key, val)
> ...             self.dict_[key] = val
> ...     def __getitem__(self, key):
> ...             return self.dict_[key]
> ...
>>>> def trigger(d, k, v):
> ...     print '%s => %s' % (k, v)
> ...
>>>> td = TriggerDict(trigger)
>>>> td['spanish'] = 'inquisition' # see side effect below.
> spanish => inquisition
>>>> td['spanish']
> 'inquisition'
>>>>

> Obviously your trigger function would set the _changed attribute of
> the test object instead.  And again it is probably not a good idea
> unless you know exactly what you are doing.  If it was me, I'd try to
> rethink my design instead.

Thank you for suggestion, Arnaud.

Since you are discouraging this idea of trigger, may I ask an advice of
if my intention was legitimate one or not?

My intention was to have a propery 'sum' in my object, and which has sum
of all the values() of the dict (i have code to make sure that the value
of dict are all numeric).  I could just the propery being calculated
everytime the property got __getattr__.  But I thought that it was
inefficient to calculate the same number over and over when the value is
already known.  So I was thiking of calculating the number only when the
dict got modified.

I also experimented with the idea of subclassing dict itself to
calculate the sum.  Is this what would be better solution?

Thank you again,



> --
> Arnaud



-- 
yosuke kimura
Center for Energy and Environmental Resources
The Univ. of Texas at Austin, USA


From robert.kern at gmail.com  Sat Sep 15 14:50:10 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 15 Sep 2007 13:50:10 -0500
Subject: how to join array of integers?
In-Reply-To: <13eo1rb73mg8b77@corp.supernews.com>
References: <1189859762.563599.269270@g4g2000hsf.googlegroups.com>	<a23effaf0709150551g19c611eqe1c912acf02306d3@mail.gmail.com>	<46EBE498.9040800@ehas.org>	<mailman.583.1189872945.2658.python-list@python.org>
	<13eo1rb73mg8b77@corp.supernews.com>
Message-ID: <fch9he$u04$1@sea.gmane.org>

Grant Edwards wrote:
> On 2007-09-15, Erik Jones <erik at myemma.com> wrote:
> 
>>>> print ''.join([str(i) for i in [1,2,3]])
>>> It's better to use generator comprehension instead of LC:
>>>
>>> ",".join(str(i) for i in [1, 2, 3])
>> Why is that?  That entire expression must be evaluated to obtain the  
>> result, so what is the advantage of using a generator comprehension  
>> v. a list comprehension?
> 
> The generator avoids creating the intermediate list -- it
> generates the intermediate values on the fly. For short
> sequences it probably doesn't matter much.  For a very long
> list it's probably noticable.

Not true. str.join() creates a list from the iterator if it is not already a
list or a tuple. In Objects/stringobject.c, look at string_join(); it calls
PySequence_Fast() on the argument. Looking in Objects/abstract.c, we see that
PySequence_Fast() short-circuits lists and tuples but builds a full list from
the iterable otherwise.

map() seems to reliably be the fastest option, and list comprehensions seem to
slightly edge out generator comprehensions if you do the timings.

-- 
Robert Kern

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



From bignose+hates-spam at benfinney.id.au  Tue Sep 11 01:21:45 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 11 Sep 2007 15:21:45 +1000
Subject: Version numbering (was: Enum class with ToString functionality)
References: <1189416537.050002.61120@r34g2000hsd.googlegroups.com>
	<87bqca9hrw.fsf@benfinney.id.au>
	<1189472591.797327.189180@w3g2000hsg.googlegroups.com>
	<87sl5m7xxm.fsf@benfinney.id.au>
	<1189478288.237609.25140@50g2000hsm.googlegroups.com>
	<87odg99a6p.fsf@benfinney.id.au>
	<1189481628.270743.181300@g4g2000hsf.googlegroups.com>
Message-ID: <87bqc993py.fsf_-_@benfinney.id.au>

TheFlyingDutchman <zzbbaadd at aol.com> writes:

> On Sep 10, 7:55 pm, "J. Cliff Dyer" <j... at sdf.lonestar.org> wrote:
> > Uh... The 1.0 version is vaporware?
> 
> I think not. 42% of it is alive and kicking as we speak.

That's odd. Do you think some similar matchematical relationship
exists between Python version 2.4.4 and 3.0?

You've made the common error of reading a package version as though it
were a single number on a number line. That's not the customary
semantic, though: versions are interpreted as a tuple of distinct
integers.

> When you were developing your Enum module, how did you determine you
> were at the 0.4.2 version as opposed to the 0.7.1 version or the
> 0.9.2 version?

I initially developed at version 0.0, meaning "major level 0, minor
level 0" ? i.e., no releases at all.

Then, when the first "alpha" release was ready, I called it version
0.1, meaning "major level 0, minor level 1" ? i.e. no major releases
yet, but the first minor release.

Then, a small patch needed to be made, and the resulting release was
version 0.1.1, meaning "major level 0, minor level 1, patch level 1" ?
i.e. the first patch to version 0.1.

Eventually some extra features warranted a release of version 0.2,
meaning "major level 0, minor level 2" ? i.e. the second minor release
with still no major releases. Implicit in this is "patch level 0",
i.e. no patch-level versions yet; the version could be called 0.2.0
and have the same meaning.

Each dot-separated integer is interpreted as a distinct level,
subordinate to the preceding one:

  * Two versions with different major numbers can be expected to be
    incompatible.

  * If two versions have the same major number, one can expect only
    minor feature differences.

  * If two versions have the same major and minor number, one can
    expect that they differ only in bug fixes or the like.

  * Subsequent integers would imply even smaller differences at that
    same level if all preceding numbers were the same.

Within a level, subsequent integers imply subsequent release times:
version 0.4.1 can only be released before 0.4.2. However, this is not
true across levels: a hypothetical version 0.2.7 could be released
before *or* after 0.4.2, if the author decides a patch to the (equally
hypothetical) version 0.2.6 is warranted.

As for a putative version 1.0, that will not be released until I
determine the package is functionally complete and warrants a first
major release. Depending on how much changes between now and then, it
may have most, some, or none of the code you see presently in version
0.4.2.

-- 
 \          "That's all very good in practice, but how does it work in |
  `\                                             *theory*?" ?Anonymous |
_o__)                                                                  |
Ben Finney


From grante at visi.com  Mon Sep 17 10:26:39 2007
From: grante at visi.com (Grant Edwards)
Date: Mon, 17 Sep 2007 14:26:39 -0000
Subject: Python "with"
References: <fck2di$7to$1@ss408.t-com.hr> <fcleos$2rt$1@news2.u-psud.fr>
	<fclikb$blt$1@news2.carnet.hr> <fclom8$8h6$1@news2.u-psud.fr>
Message-ID: <13et3kv409e355d@corp.supernews.com>

On 2007-09-17, Laurent Pointal <laurent.pointal at limsi.fr> wrote:

> Note3: Its funny to see how Python users tries to change the language, 
> does this occure with C, C++, Java, C# ?

Yes.  I remember somebody I worked with once who write a C
program using a whole pile of macros to make it look like BASIC:

#define IF  if (
#define THEN ) {
#define ELSE } else {
#define ENDIF }

and so on...

-- 
Grant Edwards                   grante             Yow! I am deeply CONCERNED
                                  at               and I want something GOOD
                               visi.com            for BREAKFAST!


From zentraders at gmail.com  Sun Sep  2 10:35:00 2007
From: zentraders at gmail.com (Zentrader)
Date: Sun, 02 Sep 2007 14:35:00 -0000
Subject: Pivy problem and some other stuff
In-Reply-To: <13df1kmak87mbb@corp.supernews.com>
References: <1188501707.593319.23330@m37g2000prh.googlegroups.com>
	<5jom54Fh543U2@mid.uni-berlin.de>
	<13df1kmak87mbb@corp.supernews.com>
Message-ID: <1188743700.872880.21960@o80g2000hse.googlegroups.com>

On Aug 30, 8:10 pm, Scott David Daniels <dani... at dsl-only.net> wrote:
> Marc 'BlackJack' Rintsch wrote:
>
> A fine repy
>
> > In [57]: funcs = [a, b]
> > In [58]: funcs
> > Out[58]: [<function a at 0xb7792e2c>, <function b at 0xb779e1ec>]
>
> > In [59]: funcs[0]()
> > Out[59]: 1
>
> > In [60]: funcs[1]()
> > Out[60]: 2
>
> and a "list comprehension" allows you to call these things no matter how
> long the list is.
>
> So after the above:
>      >>> results = [f() for f in funcs]
>      >>> print results
>      [1, 2]

You can also use exec, but someone will tell you that the sky is going
to fall if you do.  I am one of the ones who think that calling a
function with
results = [f() for f in funcs]
doesn't "work" because it gives a meaningless error message that the
calling line didn't work.  There is already enough discussion about
this, so if you use "some_string()" to call a function, wrap it in a
try/except with a traceback.



From jergosh at wp.pl  Sun Sep  9 07:29:16 2007
From: jergosh at wp.pl (=?UTF-8?B?R3J6ZWdvcnogU8WCb2Rrb3dpY3o=?=)
Date: Sun, 09 Sep 2007 13:29:16 +0200
Subject: [OT] Re: So what exactly is a complex number?
In-Reply-To: <5kcptmF32f64U1@mid.individual.net>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>	<mailman.212.1188576194.28954.python-list@python.org>	<451mq4-les.ln1@ozzie.tundraware.com>	<mailman.266.1188644067.28954.python-list@python.org>	<lbjpq4-eo22.ln1@ozzie.tundraware.com>	<mailman.310.1188805355.28954.python-list@python.org>	<5k86hqF2if1hU1@mid.individual.net>	<mailman.141.1189072245.2658.python-list@python.org>
	<5kcptmF32f64U1@mid.individual.net>
Message-ID: <46E3D90C.5030200@wp.pl>


>> Interesting. It appears that we are ran into a mathematical
>> cultural difference. Were I come from vectors *are* defined as
>> having four properties that I enumerated. After some research I
>> found that English sources (Wikipedia) indeed give the definition
>> you supplied. 
>>     
> Indeed, interesting.
>   
After some additional research I found that the most concise definition 
given here is 'A vector is an ordered pair of points'. From that follow 
the 4 properties:
if we describe a vector by 2 points A(x_1, y_1) and B(x_2, y_2) we can 
convert this representation into the form [x_2 - x_1, y_2 - y_1] but 
some information is then lost in the process - conversion in the 
opposite direction is not possible without knowing the starting point. 
The article on the English Wikipedia (again, 
http://en.wikipedia.org/wiki/Vector_%28spatial%29) says: "*vector*, is a 
concept characterized by a magnitude and a direction. A vector *can be 
thought of as* (emphasis mine - G.) an arrow in Euclidean space, drawn 
from an *initial point* /A/ pointing to a *terminal point* /B/." 
Apparently what you know as the definition is a property where I come 
from, and vice versa.

On a side note, I discovered more such differences (my studies are 
exclusively in English and we use mostly English textbooks even though 
I'm not in an English-speaking country). According to the article in the 
English Wikipedia a set is:
"Definition
(...)By a /set/ we understand any collection /S/ of definite, distinct 
objects /s/ of our perception or of our thought (which will be called 
the /elements/ of /S/) into a whole."

In 'Basic Concepts of Mathematics' (available for free at 
http://www.trillia.com/zakon1.html), the author (who was, BTW, a Russian 
that settled in Canada) states:
"A set is often described as a collection (?aggregate?, ?class?, 
?totality?, ?family?) of objects of any specified kind. However, such 
descriptions are no definitions, as they merely replace the term ?set? 
by other undefined terms. Thus the term ?set? must be accepted as a 
primitive notion, without definition."

To its credit, the Wikipedia article states that it describes the 'naive 
theory of sets'. Not a word about primary notions under 
http://en.wikipedia.org/wiki/Axiomatic_set_theory either, though.

Similarly, I was once given a definition of a number as 'the common 
feature of sets with the same size' (or something to that effect), one 
that I couldn't find in any English source. Another, trivial, example 
can be the Abel theorem which is known as Buniakovsky (Buniakowski) 
theorem in Eastern Europe. There are also some inconsistencies in 
mathematical notation that I couldn't settle with my university 
lecturers but I don't want to deviate from the subject any further. I 
suppose they're the kind of doubts you get after reading too much 
Dijkstra ;)

 > I didn't say that you must not know the point of application, but I
> said that it was not a property of the vector itself. It is true,
> however, that in physical calculations you should not "mix" many
> types of vectors (like force) that are, in the experiment, applied
> to different points of application.
>
>   
Here it would be an intrinsic property of a vector ;). I think we've 
nailed the crux of the argument now.
>> Again, I think we were given different definitions. Mine states
>> that direction is 'the line on which the vector lies', sense is
>> the 'arrow' and magnitude is the 'length' (thus non-negative). The
>> definition is separate from mathematical description (which can be
>> '[1 1] applied at (0, 0)' or 'sqrt(2) at 45 deg applied at (0, 0)'
>> or any other that is unambiguous).
>>     
>
> Oh, I thought we were talking about quite mathematical vectors? 
>   
But we were, I think?

>> No. In one-dimensional 'space' direction is a ? quantity (a
>> 'sense'). In 2-d it can be given as an angle.
>>     
>
> Indeed, you're right. So, those vectors have different properties
> depending on the used coordinate system? I myself prefer the
> concise definition ...
>   
I think it's similar to points in space: depending on the number of 
dimensions you need a corresponding number of coordinates to describe a 
point. Whether these are Cartesian or polar coordinates (complex plane 
also springs to mind) has no bearing on their number.

Regards,
Greg


From lasses_weil at klapptsowieso.net  Tue Sep  4 02:42:45 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Tue, 04 Sep 2007 08:42:45 +0200
Subject: Tkinter
In-Reply-To: <1188882720.020666.67490@k79g2000hse.googlegroups.com>
References: <1188882720.020666.67490@k79g2000hse.googlegroups.com>
Message-ID: <46dcfe65$0$4522$9b4e6d93@newsspool3.arcor-online.net>

vijayca wrote:
> i tried to use python gui module Tkinter in solaris,aix,hpux.....
> while importing the module it  shows an error...
> 
> import Tkinter
> error says that your python may not be configured for Tk()...
> how to get out of this...
> 
Please copy and paste the invocation and (most importantly) the exact 
error you get. This will make it easier for everyone to help you.

/W


From python-url at phaseit.net  Mon Sep 17 07:27:24 2007
From: python-url at phaseit.net (Gabriel Genellina)
Date: Mon, 17 Sep 2007 11:27:24 +0000 (UTC)
Subject: Python-URL! - weekly Python news and links (Sep 17)
Message-ID: <fcloas$815$1@lairds.us>

QOTW:  "I learn something valuable from comp.lang.python every week, and
most of it has nothing to do with Python." - Richie Hindle

"Ninety percent of all problems on top of the stove are caused because
people don't preheat their pan properly." - Christopher Kimball, on the
Zen that apparently applies even beyond software development
    http://www.powells.com/authors/kimball.html

    
    Comments on a blog post of Bruce Eckel where he feels a bit
    disappointed about Python 3.0:
        http://groups.google.com.ar/group/comp.lang.python/browse_thread/thread/70abee2f6f4dd5ee/
    
    Attempts to explain how recursion works in clear words:
        http://groups.google.com.ar/group/comp.lang.python/browse_thread/thread/3a9287a528e3bab/
    
    "Ordered dictionary" means different things for different people:
        http://groups.google.com.ar/group/comp.lang.python/browse_thread/thread/b16c34f8dd09a8a0
    
    How to customize logging output in a common place:
        http://groups.google.com.ar/group/comp.lang.python/browse_thread/thread/ae5001bc1244e09a
    
    Using extended slicing and Ellipsis:
        http://groups.google.com.ar/group/comp.lang.python/browse_thread/thread/419d4ef17b2ecc67
    
    How to remove undesired traceback entries:
        http://groups.google.com.ar/group/comp.lang.python/browse_thread/thread/387f76a210d6c456
    
    Using self.name to access instance attributes is awful (newbie says):
        http://groups.google.com.ar/group/comp.lang.python/browse_thread/thread/a0ef8cf104c835a5
    

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

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

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

    Just beginning with Python?  This page is a great place to start:
	http://wiki.python.org/moin/BeginnersGuide/Programmers

    The Python Papers aims to publish "the efforts of Python enthusiats":
	http://pythonpapers.org/
    The Python Magazine is a technical monthly devoted to Python:
	http://pythonmagazine.com

    Readers have recommended the "Planet" sites:
	http://planetpython.org
	http://planet.python.org

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

    Python411 indexes "podcasts ... to help people learn Python ..."
    Updates appear more-than-weekly:
        http://www.awaretek.com/python/index.html

    Steve Bethard continues the marvelous tradition early borne by
    Andrew Kuchling, Michael Hudson, Brett Cannon, Tony Meyer, and Tim
    Lesher of intelligently summarizing action on the python-dev mailing
    list once every other week.
	http://www.python.org/dev/summary/

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

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

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

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

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

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch

    Although unmaintained since 2002, the Cetus collection of Python
    hyperlinks retains a few gems.
        http://www.cetus-links.org/oo_python.html

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

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

    Many Python conferences around the world are in preparation.
    Watch this space for links to them.

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
	http://www.python.org/dev/peps/pep-0042/

    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

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

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

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

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


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

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


-- The Python-URL! Team--

Phaseit, Inc. (http://phaseit.net) is pleased to participate in and
sponsor the "Python-URL!" project.  Watch this space for upcoming
news about posting archives.


From kskuhlman at gmail.com  Wed Sep 26 23:26:32 2007
From: kskuhlman at gmail.com (Ken Kuhlman)
Date: Thu, 27 Sep 2007 03:26:32 -0000
Subject: Best way to do attribute docstrings?
In-Reply-To: <mailman.1082.1190784382.2658.python-list@python.org>
References: <1189195567.238990.54440@57g2000hsv.googlegroups.com>
	<mailman.262.1189214761.2658.python-list@python.org>
	<1189540345.260656.115760@q5g2000prf.googlegroups.com>
	<1190770891.044084.123540@50g2000hsm.googlegroups.com>
	<mailman.1082.1190784382.2658.python-list@python.org>
Message-ID: <1190863592.874028.49260@57g2000hsv.googlegroups.com>

On Sep 26, 12:25 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Tue, 25 Sep 2007 22:41:31 -0300,KenKuhlman<kskuhl... at gmail.com>
> escribi?:
>
> > Replying to myself in case someone finds this interesting.
>
> > Anyway, I took another shot at this with a little fresher mind, and it
> > was quickly obvious that I was trying to force attributes to behave
> > more like classes.  It was a small step from there to creating a
> > factory function to return instances of the appropriate class.  I'm
> > much happier with the result than either of the two previously posted
> > kludges.
>
> Still there is something I don't understand on your design. You appear to
> be always concerned about *class* attributes. *Instance* attributes are
> far more comon, and usually they change their value many times.
>
...
> Gabriel Genellina


I've only cared about class attributes to this point because my needs
have been simple.  They may not always be, however, so I'll take a
shot at your challenge (below).   I've basically just added a base
class that defines __setattr__ to the mix.

Thanks for the replies!
-Ken


# A factory function for generating attributes that can be annotated.
def attr(value, doc=None):
    base = type(value)
    if base == bool:
        # bool class can't be used as a base, so we make one that can.
        class MyBool(int):
            def __str__(self):
                return str(bool(self))
            __repr__ = __str__
        base = MyBool

    class FancyAttr(base):
        pass

    fa = FancyAttr(value)
    fa.__doc__ = doc
    return fa

class AnnotatedAttrsBase(object):
    _sticky_docs = True #False
    def __setattr__(self, name, value):
        """ Make sure attributes are fancy, maintaining docs if
they're sticky. """
        if type(value).__name__ != 'FancyAttr':
            doc = None
            if self._sticky_docs and hasattr(self, name):
                doc = self.__dict__[name].__doc__
            self.__dict__[name] = attr(value, doc)
        else:
            self.__dict__[name] = value

class Animal(AnnotatedAttrsBase):
    can_fly = attr(value = False,
                   doc = "no Animal can fly unless explicitly noted")
    lives = attr(value = 1,
                 doc = "most Animals have a single life")
    def __init__(self, color, legs, favorite_food):
        self.color = attr(color, "every animal has a color")
        self.legs = attr(legs, "most animals have legs")
        self.favorite_food = favorite_food

class Mammal(Animal):
    pass

class Cat(Mammal):
    def __init__(self, color):
        Mammal.__init__(self, color=color, legs=4,
favorite_food='mice')
        self.lives = attr(value = 7,
                          doc = "a cat starts with 7 lives")

class Mouse(Mammal):
    def __init__(self, color, personality):
        Mammal.__init__(self, color=color, legs=4,
favorite_food='cheese')
        self.personality = personality

class Bird(Animal):
    can_fly = True
    _sticky_docs = False
    def __init__(self, color):
        Animal.__init__(self, color=color, legs=2,
favorite_food='seed')

tweety = Bird('yellow')
tweety.lives = 42
sylvester = Cat('black')
tom = Cat('blue')
jerry = Mouse('brown', 'nice')
itchy = Mouse('blue', 'sadist')
scratchy = Cat('black')
scratchy.lives = attr(7**7, "or so...")

print scratchy.color, scratchy.color.__doc__
print scratchy.lives, scratchy.lives.__doc__
print tweety.legs, tweety.legs.__doc__
print tweety.lives, tweety.lives.__doc__



From munncha at gmail.com  Sat Sep 22 22:28:46 2007
From: munncha at gmail.com (Kurtis Heimerl)
Date: Sat, 22 Sep 2007 19:28:46 -0700
Subject: Preemption in python
Message-ID: <9a4753250709221928s5768b15emecfd71a0f476cce@mail.gmail.com>

Hi, I'm developing my first python application, a multi-threaded cell phone
gadget on ubuntu 7.10. I've just split off my first thread, and I've noticed
something extremely strange: There doesn't seem to be any preemption. There
are currently two threads, one that pings a storage service to see if there
are messages available, and the other that runs the gtk windows. If I do not
explicitly yield either one, it runs forever. I'm assuming this is a setting
somewhere, but that's a very strange default behavior.

How do I get this to go about preempting these threads? Any advice would be
helpful. Thanks!

I apologize if anyone sees this twice, I sent a copy earlier but did not
receive it from the mailing list, indicating to me that it wasn't received
correctly.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070922/7321b5af/attachment.html>

From mcknight0219 at gmail.com  Fri Sep  7 04:10:17 2007
From: mcknight0219 at gmail.com (Jimmy)
Date: Fri, 07 Sep 2007 01:10:17 -0700
Subject: wxPython unexpected exit
Message-ID: <1189152617.169438.296630@d55g2000hsg.googlegroups.com>

Hi, wxPython is cool and easy to use, But I ran into a problem
recently when I try to write a GUI.
The thing is I want to periodically update the content of StatixText
object, so after create them, I pack them into a list...the problem
comes when I later try to extract them from the list! I don't know
why?
my code is as following:

import wx, socket
import thread

class MyFrame(wx.Frame):

	firstrun = 0
	def __init__(self):
		wx.Frame.__init__(self, None, -1, 'Notifier')
		self.panel = wx.Panel(self, -1)
		self.length = 50
		self.scale = 0.6
		self.count = 5
		self.size = wx.Frame.GetSize(self)
		self.distance = self.size[1] / self.count
		self.labellist = []
		self.gaugelist = []

	def ParseAndDisplay(self, data):
		print "Successful access to main Frame class"
		print 'And receive data: ', data
		if MyFrame.firstrun == 0:
			print 'First time run'
			items = 3
			for i in range(items):
				self.labellist.append(wx.StaticText(self.panel, -1, data+str(i),
(150, 50+i*20), (300,30)))
			MyFrame.firstrun = 1
		else:
			self.labellist[0].SetLabel('AAA')//PROGRAM WILL ABORT HERE!!!
			self.labellist[1].SetLabel("Guo")
			self.labellist[2].SetLabel("Qiang")


class NetUdp:

	def __init__(self):
		self.port = 8081
		self.s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
		self.s.bind(("", self.port))
		print "Listening on port", self.port

	def recvdata(self):
		data, addr = self.s.recvfrom(1024)
		return data


def netThread():
	netudp = NetUdp()
	while True:
		data = netudp.recvdata()
		frame.ParseAndDisplay(data)

if __name__ == '__main__':
	firstrun = 0
	app = wx.PySimpleApp()
	frame = MyFrame()
	frame.Show()
# start network thread first
	id = thread.start_new_thread(netThread, ())
# main wxpython loop begins
	app.MainLoop()

I know the code is ugly, but can anyone really save me here!



From mail at timgolden.me.uk  Mon Sep 10 12:06:13 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Mon, 10 Sep 2007 17:06:13 +0100
Subject: Silent SaveAs when using the Excel win32com module
In-Reply-To: <1189439861.200686.245420@k79g2000hse.googlegroups.com>
References: <1189439861.200686.245420@k79g2000hse.googlegroups.com>
Message-ID: <46E56B75.7030301@timgolden.me.uk>

Chris wrote:
> I'm trying to create an excel file which will act as a log, however I
> want to overwrite the file if it exists.
> 
> Looking at the SaveAs method I can't find anything that would allow
> it. I don't want the prompt to appear to ask whether to replace the
> file or not. I just want to replace it without thinking.

   xl.DisplayAlerts = 0

where xl is the Application object.

TJG


From dhanlen at owt.com  Tue Sep 11 23:54:42 2007
From: dhanlen at owt.com (Don Hanlen)
Date: Tue, 11 Sep 2007 20:54:42 -0700
Subject: Basic GUI
Message-ID: <1189569282.372083.264560@57g2000hsv.googlegroups.com>

I'm writing a simple GUI that:
    ..gets info via telnet protocol (and sends)
    ..gets info via http (and sends)
    ..gets user-info from (currently)
        ...Tkinter Text windoze
        ...Tkinter buttons and such
    ..displays info in various Tkinter windoze
        ...graphic AND text...

I can accomplish all of these functions individually and now seem to
need to set up multi-processes to combine 'em.  Back in my C days, I'd
have used fork/exec to do so, but I'm confused by the number of
modules available in Python.  Is there a "best" for portability and
simplicity?  (Or am I on the wrong track here?)

I could solve my problems with the following psuedo-code made into
real code:
----
    import blah

    t = blah.fork(runthisprogram.py)

    #OK still in main
    t.sendinfo(info)
    info = t.receiveinfo()
----
    #runthisprogram.py
    def sendinfobacktopapa():
        ? eventhere
    def getinfofrompapa():
        ? eventhere
----

It seems to me that propagating events *may* be the best way to
communicate.  I'm wide open, including to non-multi-process solutions.

Thanks for your comments, I searched old posts for a while, various
other Python info-sources, and couldn't find an answer.
--
don



From steven.bethard at gmail.com  Fri Sep  7 16:54:15 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 07 Sep 2007 14:54:15 -0600
Subject: Is a Borg rebellion possible? (a metaclass question)
In-Reply-To: <mailman.245.1189191618.2658.python-list@python.org>
References: <1189168282.665210.260840@19g2000hsx.googlegroups.com>	<mailman.220.1189171663.2658.python-list@python.org>	<1189180478.257790.60160@g4g2000hsf.googlegroups.com>
	<mailman.245.1189191618.2658.python-list@python.org>
Message-ID: <FeKdnSy4itjqJ3zbnZ2dnUVZ_remnZ2d@comcast.com>

Carsten Haese wrote:
> Indeed, if you have an __init__ method that shouldn't see the "group"
> argument, you need a metaclass after all so you can yank the "group"
> argument between __new__ and __init__. The following code seems to work,
> but it's making my brain hurt:
> 
> class SplinterBorgMeta(type):
>     def __call__(cls, *args, **kwargs):
>         inst = cls.__new__(cls, *args, **kwargs)
>         kwargs.pop("group",None)
>         inst.__init__(*args,**kwargs)
>         return inst
> 
> class SplinterBorg(object):
>     __metaclass__ = SplinterBorgMeta
>     _shared_states = {}
>     def __new__(cls, *a, **k):
>         group = k.pop("group","BORG")
>         obj = object.__new__(cls, *a, **k)
>         obj.__dict__ = cls._shared_states.setdefault(group,{})
>         return obj
> 
> class MyClass(SplinterBorg):
>     def __init__(self, name):
>        self.name = name
> 

I think I would probably write that as::

     >>> class SplinterBorgMeta(type):
     ...     def __init__(cls, name, bases, bodydict):
     ...         cls._shared_states = {}
     ...     def __call__(cls, *args, **kwargs):
     ...         group = kwargs.pop('group', None)
     ...         inst = cls.__new__(cls, *args, **kwargs)
     ...         inst.__dict__ = cls._shared_states.setdefault(group, {})
     ...         inst.__init__(*args, **kwargs)
     ...         return inst
     ...
     >>> class MyClass(object):
     ...     __metaclass__ = SplinterBorgMeta
     ...     def __init__(self, name):
     ...         self.name = name
     ...
     >>> a = MyClass('a')
     >>> aa = MyClass('aa')
     >>> b = MyClass('b', group='b')
     >>> bb = MyClass('bb', group='b')
     >>> a.name, aa.name, b.name, bb.name
     ('aa', 'aa', 'bb', 'bb')

That is, I don't think there's really a need for __new__ if you're using 
a metaclass. Just set the instance's __dict__ in the __call__ method of 
the metaclass.

STeVe


From rw at smsnet.pl  Fri Sep 14 16:55:33 2007
From: rw at smsnet.pl (Rob Wolfe)
Date: Fri, 14 Sep 2007 22:55:33 +0200
Subject: why does Configparser change names to lowercase ?
References: <mailman.551.1189800820.2658.python-list@python.org>
Message-ID: <87ejh1ezlm.fsf@merkury.smsnet.pl>

stef mientki <stef.mientki at gmail.com> writes:

> hello,
>
> Why does  Configparser change names to lowercase ?
>
> As Python is case sensitive (which btw I don't like at all ;-)
> but now when really need the casesensitivity,
> because it handles about names which should be recognized by human,
> it changes everything to lowercase ????

I don't know why, but I know how to change it and I found the solution here:
http://docs.python.org/lib/RawConfigParser-objects.html

You need to change the implementation of method `optionxform`, e.g.:

# config
[section1]
option1=item1
Option2=item2
option2=item3

# cfg.py
from ConfigParser import ConfigParser

config = ConfigParser()
config.optionxform = str
config.read('config')
print config.get('section1', 'option1')
print config.get('section1', 'Option2')
print config.options('section1')

HTH,
Rob


From m.n.summerfield at googlemail.com  Wed Sep 12 03:33:45 2007
From: m.n.summerfield at googlemail.com (Mark Summerfield)
Date: Wed, 12 Sep 2007 07:33:45 -0000
Subject: An ordered dictionary for the Python library?
Message-ID: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>

I feel that Python lacks one useful data structure: an ordered
dictionary.

I find such data structures v. useful in C++. I know that in Python
the sort function is v. fast, but often I prefer never to sort but
simply to use an ordered data structure in the first place.
(I'm aware that for ordered lists I can use the bisect module, but I
want an ordered key-value data structure.)

I think other people must find such things useful. There are three
implementations on the Python Cookbook site, and one on PyPI, all in
pure Python (plus I have my own implementation, also pure Python).

I would suppose that it would be better if it was implemented in C---
for example, my own pure Python ordered dict loads data about eight
times slower than the built-in dict. Nonetheless, I still find it
worth using for the convenience it offers.

Do other Python programmers feel this lack? Is this worth a PEP?

[I originally asked about this on the P3K mailing list, but then
realised that it isn't version-specific really.]



From steve at holdenweb.com  Thu Sep  6 16:49:51 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 06 Sep 2007 13:49:51 -0700
Subject: parsing long `To' and 'Cc' from email
In-Reply-To: <46E06244.80308@fmed.uba.ar>
References: <46E06244.80308@fmed.uba.ar>
Message-ID: <fbpp5h$pje$1@sea.gmane.org>

Gerardo Herzig wrote:
> Hi all. Im trying to develop yet another email filter. Just for fun for 
> now. Im having a little trouble parsing long 'To' and 'Cc' headers. 
> Sometimes p.e. the 'To' header comes like
> 
> 'account1 at site.com, account at site2.com'
> others comes like
> '"My self" <my.account at self.net>, "My brother" <brother.account at self.net>',
> other times a \r\t comes inside the `To' header. And any combination of 
> the above mentioned (and shurely more) can ocur.
> 
> the email.* package dont seems to parse that kind of headers 
> `correctly'. What i want is to get a list with all the email address in 
> the `To' header.
> 
> Someone know if there is a more sofisticated parser for doing this?
> 
Have you tried using email.utils.getaddresses()?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From robin at reportlab.com  Tue Sep 18 13:10:14 2007
From: robin at reportlab.com (Robin Becker)
Date: Tue, 18 Sep 2007 18:10:14 +0100
Subject: can Python be useful as functional?
In-Reply-To: <fcoth7$ae0$1@sea.gmane.org>
References: <1190073045.618869.261290@k79g2000hse.googlegroups.com>
	<fcoth7$ae0$1@sea.gmane.org>
Message-ID: <46F00676.4010406@chamonix.reportlab.co.uk>

Steve Holden wrote:
> Lorenzo Stella wrote:
......
> So, which environment do you habitually use that provides an *unlimited* 
> stack?
> 
> You remind me of the conversation between the philosopher and an 
> attractive lady whom he was seated next to at dinner. He asked her if 
> she would sleep with him for a million dollars, to which she readily 
> agreed. So he followed this by asking her if she'd sleep with him for a 
> dollar. She replied: "No. Do you take me for a prostitutte?", to which 
> his riposte was "We have already established that fact, and are now 
> merely haggling about the price".
> 

allegedly G B Shaw 
(http://findarticles.com/p/articles/mi_qn4158/is_19980925/ai_n14182408)
-- 
Robin Becker



From toby at tobiah.org  Thu Sep  6 14:56:20 2007
From: toby at tobiah.org (Tobiah)
Date: Thu, 06 Sep 2007 11:56:20 -0700
Subject: interesting puzzle......try this you will be rewarded...
In-Reply-To: <1189072576.997085.32360@r29g2000hsg.googlegroups.com>
References: <1189072576.997085.32360@r29g2000hsg.googlegroups.com>
Message-ID: <46e04138$0$16377$88260bb3@free.teranews.com>

My adblock extension must be doing a great job.
I don't see any ads.  The puzzle is fun really,
but I'm stuck right now at 'eeiigg'.



Renu wrote:
> Hi,
> 
> Just click on this link n use ur common sence to navigate.
> 
> It has 23 pages one after the other, starting from this first
> 
> Page.
> The trick is to find a way to go to the next page.
> 
> If u can really go to the 23rd page ur a genius in ur own respect :)
> 
> So best of luck n keep clicking, tik tik....
> 
> http://iamhere.50webs.com
> 

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



From sjmachin at lexicon.net  Wed Sep  5 07:34:07 2007
From: sjmachin at lexicon.net (John Machin)
Date: Wed, 05 Sep 2007 04:34:07 -0700
Subject: Looping through File Question
In-Reply-To: <1188989934.436165.213680@w3g2000hsg.googlegroups.com>
References: <1188989934.436165.213680@w3g2000hsg.googlegroups.com>
Message-ID: <1188992047.858695.174790@r34g2000hsd.googlegroups.com>

On Sep 5, 8:58 pm, planetmatt <planetm... at gmail.com> wrote:
> I am a Python beginner.  I am trying to loop through a CSV file which
> I can do.  What I want to change though is for the loop to start at
> row 2 in the file thus excluding column headers.
>
> At present I am using this statement to initiate a loop though the
> records:
>
> for line in f.readlines():
>
> How do I start this at row 2?

The quick answer to your literal question is:
  for line in f.readlines()[1:]:
or, with extreme loss of elegance, this:
  for lino, line in enumerate(f.readlines()):
      if not lino:
          continue

But readline and readlines are old hat, and you wouldn't want to read
a file of a few million lines into a big list, so a better answer is:

    _unused = f.next()
    for line in f:

But you did say you were reading a CSV file, and you don't really want
to do your own CSV parsing, even if you think you know how to get it
right, so best is:

    import csv
    rdr = csv.reader(f)
    heading_row = rdr.next()
    for data_row in rdr:

HTH,
John



From http  Sat Sep  1 03:09:36 2007
From: http (Paul Rubin)
Date: 01 Sep 2007 00:09:36 -0700
Subject: ANN: SCF released GPL
References: <2qnAi.21495$eY.19028@newssvr13.news.prodigy.net>
	<7x3ay5d1mn.fsf@ruckus.brouhaha.com> <fbb2b6$hfv$2@lust.ihug.co.nz>
Message-ID: <7xhcmen9ov.fsf@ruckus.brouhaha.com>

Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> writes:
> > Does it have to be SVN?  I think Savannah and Sourceforge both still
> > use CVS.
> Why would you want to use CVS rather than Subversion?

Those sites have been around since before SVN.  CVS was what was
available, so they used it.  Using CVS for something new would be
silly, of course.


From mh at pixar.com  Wed Sep 12 16:52:30 2007
From: mh at pixar.com (mh at pixar.com)
Date: Wed, 12 Sep 2007 20:52:30 GMT
Subject: compiling an extension for several versions of python
Message-ID: <ikYFi.7707$z_5.373@nlpi069.nbdc.sbc.com>

I don't have access to site-packages, but I would like
to provide versions of my c-language package compiled against
python 2.4 and 2.5.

I "own" a library directory which is included in our site's
sys.path.  Currently this is where the 2.4 shared libary
is installed.

What's the most canonical way of doing this?  This is on linux.

Many TIA!
Mark

-- 
Mark Harrison
Pixar Animation Studios


From arkanes at gmail.com  Thu Sep 13 10:46:50 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 13 Sep 2007 09:46:50 -0500
Subject: Possible suggestion for removing the GIL
In-Reply-To: <1189694267.608577.288290@r34g2000hsd.googlegroups.com>
References: <1189657576.772108.136550@d55g2000hsg.googlegroups.com>
	<5ksb3mF5828oU1@mid.uni-berlin.de>
	<1189694267.608577.288290@r34g2000hsd.googlegroups.com>
Message-ID: <4866bea60709130746t121a04a3x3b15a0a8b2490410@mail.gmail.com>

On 9/13/07, Prateek <surekap at gmail.com> wrote:
> On Sep 13, 1:36 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> > Prateek wrote:
> > > Hi,
> >
> > > Recently there was some talk on removing the GIL and even the BDFL has
> > > written a blog post on it.
> > > I was trying to come up with a scalable and backwards compatible
> > > approach for how to do it.
> >
> > > I've put my thoughts up in a blog post - and I'd really like to hear
> > > what the community thinks of it.
> > > Mainly it revolves around dedicating one core for executing
> > > synchronized code and doing context switches instead of acquiring/
> > > releasing locks.
> >
> > Where is the gain? Having just one core doesn't give you true parallelism -
> > which is the main reason behind the cries for a GIL-less Python.
> >
> > Diez
>
> Diez,
>
> I was talking of dedicating one core for synchronized code. In the
> case of a threaded app on two cores, one core would be dedicated to
> synchronized code and the other would run non-sync code (effectively
> behaving like a single threaded machine). However, on machines with n
> cores where n > 2 cores, we would have n-1 cores available to run code
> in parallel.
>

What you're describing would have the same characteristics as the
current code - code that is able to execute without the GIL held
already will run in parallel on a multi-core machine.


From chris.olekas at gmail.com  Tue Sep 11 13:29:32 2007
From: chris.olekas at gmail.com (Chris)
Date: Tue, 11 Sep 2007 10:29:32 -0700
Subject: Excel process still running after program completion.
In-Reply-To: <1189531603.894247.218710@r29g2000hsg.googlegroups.com>
References: <1189525558.721174.198370@19g2000hsx.googlegroups.com>
	<mailman.394.1189529975.2658.python-list@python.org>
	<1189531603.894247.218710@r29g2000hsg.googlegroups.com>
Message-ID: <1189531772.257865.292510@k79g2000hse.googlegroups.com>

On Sep 11, 1:26 pm, Chris <chris.ole... at gmail.com> wrote:
> On Sep 11, 12:59 pm, "Hamilton, William " <wham... at entergy.com> wrote:
>
>
>
> > > From: Chris
>
> > > I have a python script that is driving Excel and using the win32com
> > > module. However, upon program completion there's still an Excel.exe
> > > process running in the background that I must terminate through Task
> > > Manager. Reading up on other threads indicate that maybe I still have
> > > some Excel objects referenced within my code. Is this why the process
> > > doesn't terminate?
>
> > > The related (I hope) parts of my code is here.
>
> > > x1App = Dispatch("Excel.Application")
> > > Book1 = x1App.Workbooks.Open(ExcelLogPath+"\\outputLog-template.xls")
> > > x1App.Visible = 1
> > > for sheets in Book1.Worksheets:
> > >              if sheets.Name == file_name:
> > >                       sheetExists = True
> > > if sheetExists != True:
> > >              activeSheet =
> > > Book1.Worksheets.Add(After=Book1.Worksheets(1))
> > >              activeSheet.Name = file_name
> > >              testNum[file_name] = 0
> > > Book1.Worksheets(file_name).Select()
> > > Book1.ActiveSheet.Cells(1+(testNum[file_name]*20),1).Value = "Original
> > > File Name"
> > > Book1.ActiveSheet.Cells(2+(testNum[file_name]*20),1).Value =
> > > file_name
> > > Book1.ActiveSheet.Pictures().Insert(output).Select()
> > > Book1.SaveAs(Filename=path)
> > > x1App.ActiveWorkbook.Close(SaveChanges=0)
> > > x1App.Quit()
> > > del x1App
> > > del Book1
> > > del activeSheet
>
> > > What am I missing?
>
> > In my Excel projects, I terminate it with:
>
> > xlBook.Close()
> > xlApp.Quit()
>
> > I haven't had a problem with Excel staying open after the program ends.
>
> > (On a tangent, I want to find the person who thought it was a good idea
> > to use the same symbol in a font for 1, l, and I and do some unpleasant
> > things.)
>
> > --
> > -Bill Hamilton
>
> That doesn't really fix the problem as I'm pretty sure its identical
> code for
> x1App.ActiveWorkbook.Close(SaveChanges=0)
>
> I think where my problem lies is within my for each loop where I
> search to see if the worksheet with the name already exists
> for sheets in Book1.Worksheets:
>      if sheets.Name == file_name:
>            sheetExists = True
>
> Since I'm assuming that it creates objects for each of the sheets and
> I don't delete them...

Which I'm right... I added this code and now there's no EXCEL.EXE
process after my script completes

for sheets in Book1.Worksheets:
      if sheets.Name == file_name:
            sheetExists = True
      sheets = None
      del sheets



From exarkun at divmod.com  Tue Sep  4 08:35:53 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Tue, 4 Sep 2007 08:35:53 -0400
Subject: Python is overtaking Perl
In-Reply-To: <1188865943.238573.218750@w3g2000hsg.googlegroups.com>
Message-ID: <20070904123553.8162.1505839180.divmod.quotient.3578@ohm>

On Tue, 04 Sep 2007 00:32:23 -0000, Ben <benyang22 at gmail.com> wrote:
>Here are the statistics from Google Trends:
>
>http://benyang22a.blogspot.com/2007/09/perl-vs-python.html
>

>From the graph, it seems more accurate to say that Perl is undertaking Python.

Jean-Paul


From Digvijoy.C at gmail.com  Wed Sep  5 23:08:30 2007
From: Digvijoy.C at gmail.com (digz)
Date: Thu, 06 Sep 2007 03:08:30 -0000
Subject: Python is overtaking Perl
In-Reply-To: <Xns99A16EB3640BAOKB@199.45.49.11>
References: <1188865943.238573.218750@w3g2000hsg.googlegroups.com>
	<mailman.22.1188909362.2658.python-list@python.org>
	<1188925214.716404.219920@22g2000hsm.googlegroups.com>
	<Xns99A16EB3640BAOKB@199.45.49.11>
Message-ID: <1189048110.057158.108750@g4g2000hsf.googlegroups.com>

On Sep 4, 1:53 pm, "OKB (not okblacke)"
<brenNOSPAMb... at NObrenSPAMbarn.net> wrote:
> George Sakkis wrote:
> > On Sep 4, 8:35 am, Jean-Paul Calderone <exar... at divmod.com> wrote:
> >> On Tue, 04 Sep 2007 00:32:23 -0000, Ben <benyan... at gmail.com>
> >> wrote:
> >> >Here are the statistics from Google Trends:
>
> >> >http://benyang22a.blogspot.com/2007/09/perl-vs-python.html
>
> >> >From the graph, it seems more accurate to say that Perl is
> >> >undertaking Python.
>
> >> Jean-Paul
>
> > And to make it even more accurate, "Perl is undertaking Python in
> > India", since that's where the difference in favor of Python comes
> > from.
>
>         No, it's the other way around.  The big difference in India is in
> favor of Perl.
>


I guess India is a big leader in perl coz all the decades old perl
scripts are maintained in India.
US Corporations have outsourced fixing/changing 80s-90s perl code to
India.



From Shawn at Milochik.com  Wed Sep 19 14:31:56 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Wed, 19 Sep 2007 14:31:56 -0400
Subject: Finding prime numbers
In-Reply-To: <1190225821.182650.227540@k79g2000hse.googlegroups.com>
References: <1190218927.7991.25.camel@apprentice-laptop>
	<82b4f5810709190931u16ee0621xc6608d2bcb2fec5e@mail.gmail.com>
	<1190219929.7991.28.camel@apprentice-laptop>
	<2dc0c81b0709191013k181d1a74m76a08cecadb005c4@mail.gmail.com>
	<mailman.777.1190222135.2658.python-list@python.org>
	<1190225821.182650.227540@k79g2000hse.googlegroups.com>
Message-ID: <2dc0c81b0709191131l3daa1507uf5efa79afd7b75ee@mail.gmail.com>

> If you'd just search the archives, you would have found this:
>
> http://groups.google.com/group/comp.lang.python/browse_thread/thread/b134b2235e9c19a6/34857fb0b0b2a4b5?lnk=gst&q=prime+number&rnum=1#34857fb0b0b2a4b5


Yeah, but that's no fun. ;o)


From horpner at yahoo.com  Tue Sep  4 08:15:59 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Tue, 04 Sep 2007 12:15:59 GMT
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<87hcmhebwv.fsf@benfinney.id.au> <5jn9qgFdmbcU3@mid.uni-berlin.de>
	<1188886461.236237.168230@y42g2000hsy.googlegroups.com>
	<mailman.17.1188896543.2658.python-list@python.org>
Message-ID: <slrnfdqina.1v8.horpner@FIAD06.norwich.edu>

On 2007-09-04, Campbell Barton <cbarton at metavr.com> wrote:
> Jason wrote:
>> Returning -1 is not a good return value to indicate an error.
>> After all, -1 is a valid index in most Python lists.
>> (Negative numbers index from the tail of the list.)
>
> Agree in general tho its a bit inconsistent how...
>
> "string".find(val)
>
> ...can return -1 but .index() cant, though the inconsistency is
> probably with string since most other areas of the py api raise
> errors in cases like this.

The two functions have different ranges, but also different
domains.

sequence.index 
  domain: any item '==' to an item in sequence
  range: All non-negative indexes of sequence

string.find 
  domain: any string
  range: -1 for not found, and all non-negative indexes of string.

If you want to search for subsequences in a sequence, a la
string.find, you can use something like (what I naively assume
will be a maximally efficent):

def find(seq, subseq):
    """ Find a subsequence of seq in seq, and return its index. Return -1 if
    subseq is not found.

    >>> seq = [0, 1, 2, 3, 4, 5]
    >>> find(seq, [0, 1, 2])
    0
    >>> find(seq, [])
    0
    >>> find(seq, [3, 4])
    3
    >>> find(seq, [3, 2])
    -1
    >>> find(seq, [5, 6])
    -1
    >>> find(seq, [3])
    3
    >>> find(seq, [0, 2])
    -1

    """
    i = 0
    j = 0
    while i < len(seq) and j < len(subseq):
        if seq[i] == subseq[j]: 
            j += 1
        else:
            j = 0
        i += 1
    if j == len(subseq): return i - j
    else: return -1

It's probable that a simpler implementation using slice
operations will be faster for shortish lengths of subseq. It was
certainly easier to get it working correctly. ;)

def find(seq, subseq):
  for i, j in itertools.izip(xrange(len(seq)-len(subseq)),
                             xrange(len(subseq), len(seq))):
    if subseq == seq[i:j]:
      return i
  return -1

-- 
Neil Cerutti
I pulled away from the side of the road, glanced at my mother-in-law and
headed over the embankment. --Insurance Claim Blooper


From mark at streamservice.nl  Tue Sep 11 16:13:19 2007
From: mark at streamservice.nl (Stream Service || Mark Scholten)
Date: Tue, 11 Sep 2007 22:13:19 +0200
Subject: Python.org mirror
Message-ID: <F79CF4D66F464242A8774755186E9EFE@laptopmark>

Dear sir, madam,

Stream Service would be happy to provide a free mirror for python.org. We also host nl.php.net for free and we are happy to support more opensource websites with free hosting.

Could you inform me about the options to become an officiel python.org mirror?

With kind regards, Met vriendelijke groet,

Mark Scholten
Stream Service
Web: http://www.streamservice.nl/
E-mail: mark at streamservice.nl
NOC: http://www.mynoc.eu/
NOC e-mail: noc at streamservice.nl
Tel.: +31 (0)642 40 86 02
Fax: +31 (0)20 20 101 57
KVK: 08141074
BTW: NL104278274B01
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From deets at nospam.web.de  Mon Sep 24 07:42:05 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 24 Sep 2007 13:42:05 +0200
Subject: rules from an xml file
References: <1190633685.275142.264540@r29g2000hsg.googlegroups.com>
Message-ID: <5lpm4dF93534U1@mid.uni-berlin.de>

jonny wrote:

> I have a python code that manages some parameters using some variable
> rules that may change from day to day. I'd like that the code will
> self-modify according to rules parsed from a xml file:
> 
> example:
> 
> <rules>
>    <rule01>
>       <if>
> <or>
> <lessthan par_1="glicemyAtMorning" par_2="80"/>
> <lessthan par_1="glicemyAtNight" par_2="80"/>
> <and>
> <greaterthan par_1="glicemyAtMorning" par_2="0"/>
> <or>
> <equalto par_1="urine" par_2="0"/>
> <equalto par_1="urine" par_2="+/-"/>
> <equalto par_1="urine" par_2="+"/>
> </or>
> </and>
> </or>
> </if>
>         <then>
>            <sendmessage>Something is wrong!</sendmessage>
>         </then>
>    </rule01>
>    <rule02> ...  </rule02>
>    <rule03> ...   </rule03>
> </rules>
> 
> Due to the fact that rules may change, I have to manage the python
> program, parsing the whole xml file, and self-modify the python code
> according to these variable rules.
> How can I do?

So, essentially you are creating a dynamic language? But you already have
one - python!

Who's responsible for creating these rules, and what do they allow to be
done? Because I'd rather use python snippets to define them, that you
compile using the exec-function.

If you insist on using XML, use some module like lxml to parse and create
your own language constructs.

Just a note: the use of "par_X" as attributes is unfortunate, to say the
least. It doesn't allow for easy argument swapping, can cause troubles
because you delete one attribute and miss renaming the others, and in
general it's not good design to have arbitrary numbers of parameters.

Instead, you better go with a nested param-tag.

Diez


From trekker182 at comcast.net  Thu Sep 27 15:19:32 2007
From: trekker182 at comcast.net (Shawn Minisall)
Date: Thu, 27 Sep 2007 15:19:32 -0400
Subject: ValueError: too many values to unpack,>>>
In-Reply-To: <fdgs2t$8ni$1@sea.gmane.org>
References: <mailman.1169.1190911027.2658.python-list@python.org>	<5m24sfFatlbuU1@mid.uni-berlin.de>	<46FBED79.6070207@comcast.net>
	<fdgs2t$8ni$1@sea.gmane.org>
Message-ID: <46FC0244.4010803@comcast.net>

Fredrik Lundh wrote:
> Shawn Minisall wrote:
>
>   
>> Sorry, it looks like it's on the fourth line with the 3 values on line 
>> 4...its reading line 3 fine
>>
>> Traceback (most recent call last):
>>   File "<pyshell#0>", line 1, in <module>
>>     main()
>>   File "I:\COMPUTER PROGRAMMING CLASS\PROJECT #1\project1.py", line 33, 
>> in main
>>     deposit1, deposit2, deposit3 = string.split(line, "\t")
>> ValueError: too many values to unpack
>>     
>
> instead of fumbling around in the dark, try inserting a print statement 
> before the offending line, so you can see what you're trying to unpack:
>
>      print string.split(line, "\t") # see what it is
>      deposit1, deposit2, deposit3 = string.split(line, "\t")
>
> </F>
>   
I did and it printed everything up until the 3rd line with 3 numbers for 
deposits.  I have since figured it out...the teacher put in an extra tab 
after the last value so python thought it was 4 values for three.  I 
went back into the file and deleted the extra tab after the 3rd number 
and saved it...now it's working fine. 

I'm going to kill her...

;)



From exhuma at gmail.com  Thu Sep 20 05:08:26 2007
From: exhuma at gmail.com (exhuma.twn)
Date: Thu, 20 Sep 2007 02:08:26 -0700
Subject: Using python to create windows apps that everyone can use?
In-Reply-To: <1190231182.174676.306980@r29g2000hsg.googlegroups.com>
References: <7C008A37566.00000D2Atomharding@inbox.com>
	<mailman.736.1190143365.2658.python-list@python.org>
	<1190231182.174676.306980@r29g2000hsg.googlegroups.com>
Message-ID: <1190279306.582361.272730@19g2000hsx.googlegroups.com>

On Sep 19, 9:46 pm, Simon Hibbs <simon.hi... at gmail.com> wrote:
>  On 9/18/07, Thomas Harding <tomhard... at inbox.com> wrote:
>
>  > Hi guys, sorry to post another topic on this, as I am aware that it
> has
>  > already been posted a few times, but not with specifically what I
> am looking
>  > for. I want an app that makes a gui interface for python (similar
> to
>  > Microsoft visual studio or qt designer, not a code based one) and/
> or an app
>  > that can make this into a .exe that can be opened by any person on
> any
>  > computer without python installed.
>
> For windows only, there's always Iron Python. This allows you to use
> Visual Studio, the commercial or the express version, to create the
> GUI in VB or C# and from that call Python code that does all the heavy
> lifting.

Any pointers to that. I might have to get started soon with Visual
Studio, as our company *might* move to an all-windows development
environment.... *sigh*

/me still hopes that I can convince them that 1) developing on Linux
is at all not too shabby, and that 2) Python is a great Language! ;)

So far I am making good progress on point 2. :)

>
> I'd second the recommendation for QtDesigner if you want cross-
> platform capability.
>
> Simon Hibbs




From hiten at biochem.ucsf.edu  Tue Sep  4 00:33:43 2007
From: hiten at biochem.ucsf.edu (Hiten Madhani)
Date: Mon, 03 Sep 2007 21:33:43 -0700
Subject: scipy.org website
Message-ID: <46DCE027.1010708@biochem.ucsf.edu>

Hi,

The scipy.org website has been down. Does anyone know whether it is 
coming back up?

Hiten Madhani


From earnclick at gmail.com  Thu Sep 13 10:13:14 2007
From: earnclick at gmail.com (earnclick at gmail.com)
Date: Thu, 13 Sep 2007 07:13:14 -0700
Subject: Get unlimited visitors to your website
Message-ID: <1189692794.296572.158700@r34g2000hsd.googlegroups.com>


Is your website getting very less no. of visitors .If so, then post
your website to http://goodtolove.com to get unlimited visitors for
lifetime...No need to pay a penny.



From bj_666 at gmx.net  Fri Sep 28 13:01:55 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 28 Sep 2007 17:01:55 GMT
Subject: Python 3.0 migration plans?
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>
	<87641v4j38.fsf@benfinney.id.au>
	<1190949502.875203.57690@w3g2000hsg.googlegroups.com>
	<5m3p1dFbl98pU1@mid.uni-berlin.de>
	<1190968707.799398.232550@19g2000hsx.googlegroups.com>
	<5m4126FbgjabU1@mid.uni-berlin.de>
	<1190993122.979034.305060@50g2000hsm.googlegroups.com>
	<mailman.1236.1190995515.2658.python-list@python.org>
	<1190997769.002795.59450@57g2000hsv.googlegroups.com>
Message-ID: <5m4qc2Fbbk19U1@mid.uni-berlin.de>

On Fri, 28 Sep 2007 09:42:49 -0700, TheFlyingDutchman wrote:

> Which of the common languages have higher order functions and what is
> the syntax?

C, C++, Pascal, Perl, PHP, Ruby have them.  And of course the functional
languages, most notably Lisp and Scheme as you asked for common languages.

Don't know if C#'s delegates qualify.

Ciao,
	Marc 'BlackJack' Rintsch


From paddy3118 at googlemail.com  Fri Sep 14 16:49:00 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Fri, 14 Sep 2007 20:49:00 -0000
Subject: regexp search on infinite string?
Message-ID: <1189802940.518794.129130@r29g2000hsg.googlegroups.com>

Lets say i have a generator running that generates successive
characters of a 'string'
>From what I know, if I want to do a regexp search for a pattern of
characters then I would have to 'freeze' the generator  and pass the
characters so far to re.search.
It is expensive to create successive characters, but caching could be
used for past characters. is it possible to wrap the generator in a
class, possibly inheriting from string, that would allow the regexp
searching of the string but without terminating the generator? In
other words duck typing for the usual string object needed by
re.search?

- Paddy.



From laurent.pointal at limsi.fr  Wed Sep 12 03:20:04 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Wed, 12 Sep 2007 09:20:04 +0200
Subject: Get the complete command line as-is
In-Reply-To: <1189566000.793354.308420@19g2000hsx.googlegroups.com>
References: <1189566000.793354.308420@19g2000hsx.googlegroups.com>
Message-ID: <fc83v4$cb3$1@news2.u-psud.fr>

wangzq a ?crit :
> Hello,
> 
> I'm passing command line parameters to my browser, I need to pass the
> complete command line as-is, for example:
> 
> test.py "abc def" xyz
> 
> If I use ' '.join(sys.argv[1:]), then the double quotes around "abc
> def" is gone, but I need to pass the complete command line ("abc def"
> xyz) to the browser, how can I do this?
> 
> I'm on Windows.

As Windows command-line parsing seem to remove some chars, maybe you can 
try to use the GetCommandLine() function from Win32 API (I dont know if 
it is available in pywin32 package - you may need to write a wrapper 
with ctypes).

See http://msdn2.microsoft.com/en-us/library/ms683156.aspx


A+

Laurent.


From fakeaddress at nowhere.org  Tue Sep 25 05:20:11 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Tue, 25 Sep 2007 09:20:11 GMT
Subject: Google and Python
In-Reply-To: <7xejgr68pm.fsf@ruckus.brouhaha.com>
References: <1190228512.627109.308910@n39g2000hsh.googlegroups.com>
	<ufadnRC5BPZm6GzbnZ2dnUVZ_jOdnZ2d@comcast.com>
	<1190231094.276099.136250@22g2000hsm.googlegroups.com>
	<mailman.781.1190232163.2658.python-list@python.org>
	<1190235678.019823.315850@o80g2000hse.googlegroups.com>
	<mailman.887.1190402873.2658.python-list@python.org>
	<7xejgr68pm.fsf@ruckus.brouhaha.com>
Message-ID: <fp4Ki.55225$YL5.12775@newssvr29.news.prodigy.net>

Paul Rubin wrote:
> You can also pass the open sockets around between processes instead of
> reverse proxying, using the SCM_RIGHTS message on Unix domain sockets
> under Linux, or some similar mechanism under other Unixes (no idea
> about Windows).  Python does not currently support this but one of
> these days I want to get around to writing a patch.

Windows can do it, but differently. What a surprise.
I just looked it up: WSADuplicateSocket() is the key.
Windows and Unix modules with the same Python interface
would rock.


-- 
--Bryan


From bj_666 at gmx.net  Thu Sep 27 12:47:13 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 27 Sep 2007 16:47:13 GMT
Subject: True of False
References: <1190910814.594559.30880@n39g2000hsh.googlegroups.com>
Message-ID: <5m254hFatlbuU2@mid.uni-berlin.de>

On Thu, 27 Sep 2007 09:33:34 -0700, koutoo wrote:

> I tried writing a true and false If statement and didn't get
> anything?  I read some previous posts, but I must be missing
> something.  I just tried something easy:
> 
> a = ["a", "b", "c", "d", "e", "f"]
> 
> if "c" in a == True:
>      Print "Yes"
> 
> When I run this, it runs, but nothing prints.  What am I doing wrong?

Wow that's odd:

In [265]: a = list('abcdef')

In [266]: a
Out[266]: ['a', 'b', 'c', 'd', 'e', 'f']

In [267]: 'c' in a
Out[267]: True

In [268]: 'c' in a == True
Out[268]: False

In [269]: ('c' in a) == True
Out[269]: True

In [270]: 'c' in (a == True)
---------------------------------------------------------------------------
<type 'exceptions.TypeError'>             Traceback (most recent call last)

/home/bj/<ipython console> in <module>()

<type 'exceptions.TypeError'>: argument of type 'bool' is not iterable


What's going on there?

Ciao,
	Marc 'BlackJack' Rintsch


From bdesth.quelquechose at free.quelquepart.fr  Mon Sep 17 18:13:37 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 18 Sep 2007 00:13:37 +0200
Subject: Newbie question
In-Reply-To: <1190140395.567419.16280@k79g2000hse.googlegroups.com>
References: <1190139661.046103.45440@19g2000hsx.googlegroups.com>
	<mailman.732.1190140272.2658.python-list@python.org>
	<1190140395.567419.16280@k79g2000hse.googlegroups.com>
Message-ID: <46f01d0d$0$30530$426a34cc@news.free.fr>

koutoo at hotmail.com a ?crit :
> On Sep 18, 1:31 pm, "Shawn Milochik" <Sh... at Milochik.com> wrote:
> 
>>On 9/18/07, kou... at hotmail.com <kou... at hotmail.com> wrote:
>>
>>
>>>If I have a file name: AVC1030708.14.  How do I strip out certain
>>>characters from the file name?  I am so used to using MID, LEFT, and
>>>RIGHT functions, that I have no idea how to do this in python?  I have
>>>had trouble as well with most newbies on finding the help.  But I have
>>>used the command line built in help, but with no luck.  Thanks.
>>
>>>Kou
>>
>>Do you want to strip out specific characters, characters in specific
>>positions, or characters matching certain patterns?
> 
> 
> Yes, I want specific characters in specific positions.
> 
Err... Sorry, but something is not clear here. When you say "strip out", 
  you mean "get rid of", or "access to" ? For what I remember of basic, 
I guess it's the second answer, so:

 >>> fname = "AVC1030708.14"
 >>> print fname[0]
A
 >>> print fname[-1]
4
 >>> print fname[2:4]
C1
 >>> print fname[2:-4]
C103070
 >>>

etc...

Also and while we're at it, you also have:
 >>> fname.split('.')
['AVC1030708', '14']
 >>> fname.split('.')[0]
'AVC1030708'
 >>> fname.split('.')[1]
'14'
 >>> fname.strip('4')
'AVC1030708.1'
 >>> fname.strip('A')
'VC1030708.14'
 >>> fname.lstrip('A')
'VC1030708.14'
 >>> fname.rstrip('4')
'AVC1030708.1'
 >>> fname.rstrip('41.')
'AVC1030708'

etc...

HTH





From sebastien.lannez at gmail.com  Fri Sep 21 09:57:30 2007
From: sebastien.lannez at gmail.com (sebastien.lannez at gmail.com)
Date: Fri, 21 Sep 2007 13:57:30 -0000
Subject: __contains__() and overload of in : Bug or Feature ???
Message-ID: <1190383050.514560.232660@50g2000hsm.googlegroups.com>

Thanks for your quick response.

> > I need to overload the operator in and let him
> > return an object ... It seems it is not a
> > behavior Python expect :
> >
> >>>> class A:
> > ...    def __contains__(self,a):
> > ...        return 'yop'
> > ...
> >>>> a=A()
> >>>> print 'toto' in a
> > True
> >>>> print a.__contains__('toto')
> > yop
>

> Not sure what you're trying to achieve,

Using Python as an algebraic parser for
symbolic mathematical equation and I need
that the 'in' operator returns an object based
on its two arguments.

> but the semantics of the "in" operator
> make it return a boolean value.

That is why I need to overload it.

> The string "yop" evaluates to the boolean
> value True, as it is not empty.

Does it means that when overloading an operator, python just
wrap the call to the method and keep control of the returned
values ??? Is there a way to bypass this wrapping ???



From grante at visi.com  Wed Sep 19 12:58:40 2007
From: grante at visi.com (Grant Edwards)
Date: Wed, 19 Sep 2007 16:58:40 -0000
Subject: Embedding a executable inside Python Script
References: <mailman.772.1190220593.2658.python-list@python.org>
Message-ID: <13f2la0dq3gm0bf@corp.supernews.com>

On 2007-09-19, Shankarjee Krishnamoorthi <shankarjee at gmail.com> wrote:

> I have a exe made with py2exe for my Python routine. The issue
> I am running into is this. All the exes (mycode.exe and
> other_executable.exe) are placed in a Network drive(Say I:) so
> that people can access it.
>
> When the user calls this from a Local Drice(Say C:) The output is like this
> C:> I:\mycode.exe input_file other_executable_file.exe is not found.....

The problem is that 'other_executable.exe' isn't in a directory
that's on the current PATH.

> Is there any way where I can circumvent this. Thanks

Either set the PATH environment variable to include the
directory where other_executable.exe is located or specify the
complete path to other_executable.exe in your os.system() call.

-- 
Grant Edwards                   grante             Yow! I hope the
                                  at               ``Eurythmics'' practice
                               visi.com            birth control ...


From lasses_weil at klapptsowieso.net  Sat Sep  1 05:22:28 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Sat, 01 Sep 2007 11:22:28 +0200
Subject: So what exactly is a complex number?
In-Reply-To: <fbamkq$r7q$5@lust.ihug.co.nz>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
	<mailman.212.1188576194.28954.python-list@python.org>
	<451mq4-les.ln1@ozzie.tundraware.com>
	<46d89ba9$0$30380$9b4e6d93@newsspool4.arcor-online.net>
	<fbamkq$r7q$5@lust.ihug.co.nz>
Message-ID: <46d92f54$0$4533$9b4e6d93@newsspool3.arcor-online.net>

Lawrence D'Oliveiro wrote:
> In message <46d89ba9$0$30380$9b4e6d93 at newsspool4.arcor-online.net>, Wildemar
> Wildenburger wrote:
> 
>> Tim Daneliuk wrote:
>>> One of the most common uses for Complex Numbers is in what are
>>> called "vectors".  In a vector, you have both an amount and
>>> a *direction*.  For example, I can say, "I threw 23 apples in the air
>>> at a 45 degree angle".  Complex Numbers let us encode both
>>> the magnitude (23) and the direction (45 degrees) as a "number".
>>>
>> 1. Thats the most creative use for complex numbers I've ever seen. Or
>> put differently: That's not what you would normally use complex numbers
>> for.
> 
> But that's how they're used in AC circuit theory, as a common example.
 >
OK, I didn't put that in the right context, I guess. The "magnitude and 
direction" thing is fine, I just scratched my head at the "23 apples at 
45 degrees" example. Basically because I see no way of adding 2 apples 
at 16 degrees to 4 apples at 25 degrees and the result making any sense.
Anyway, that was just humorous nitpicking on my side, don't take it too 
seriously :).

/W


From mcknight0219 at gmail.com  Sun Sep 16 14:58:45 2007
From: mcknight0219 at gmail.com (Jimmy)
Date: Sun, 16 Sep 2007 11:58:45 -0700
Subject: (curses) issue about inch()
In-Reply-To: <mailman.620.1189967171.2658.python-list@python.org>
References: <1189955232.216664.167840@19g2000hsx.googlegroups.com>
	<mailman.617.1189959039.2658.python-list@python.org>
	<1189960868.349377.249530@k79g2000hse.googlegroups.com>
	<mailman.620.1189967171.2658.python-list@python.org>
Message-ID: <1189969125.622966.112150@n39g2000hsh.googlegroups.com>

On Sep 17, 2:25 am, Steve Holden <st... at holdenweb.com> wrote:
> Jimmy wrote:
> > On Sep 17, 12:07 am, Steve Holden <st... at holdenweb.com> wrote:
> >> Jimmy wrote:
> >>> hi, all
> >>> I attempt to use the function inch() to get the character at the
> >>> current position, and compare it with a particular character like :
> >>> if screen.inch(x,y) == 'F'
> >>> but this method doesn't seem work, can anyone tell me the reason and
> >>> how to corrent it
> >>> thanks
> >> The reason is because something is wrong, and yo fix it by correcting
> >> that issue.
>
> >> In other words, if you could be a bit more specific about *how* it
> >> doesn't work (like, show us the code you are running,a nd any error
> >> messages or evidence of incorrect results) you will be able to get some
> >> help that actually helps you.
>
> >> Would you go to a car repair shop with faulty brakes and just tell them
> >> "my car isn't working"?
>
> >> regards
> >>   Steve
> >> --
> >> Steve Holden        +1 571 484 6266   +1 800 494 3119
> >> Holden Web LLC/Ltd          http://www.holdenweb.com
> >> Skype: holdenweb      http://del.icio.us/steve.holden
>
> >> Sorry, the dog ate my .sigline
>
> > thanks,
> > actually i'm writing a game like mine,the pertainign code is:
>
> > def mark():
> >    """mark the bomb"""
> >    (row, col) = gb.scrn.getyx()
> >    x = gb.scrn.inch(row,col)
> >    if x == 'F':
> >            gb.scrn.addch(row,col, 'X',curses.color_pair(3))
> >    else:
> >            gb.scrn.addch(row,col, 'F',curses.color_pair(3))
>
> >    gb.scrn.move(row,col)
> >    gb.scrn.refresh()
>
> > the situation is x never equals 'F', even when it really is!
> > I checked the mannual and found the return value of inch() consists
> > the actual character(low 8bits)
> > and the attributes, so I tried the following: (x<<24)>>24,cause I
> > guess the int is 32bits long.
> > but it still doesn't work :(
>
> Well first of all, thanks for reading the manual.
>
> Let's suppose the value you are receiving is 1234 (clearly more than 8
> bits). Unfortunately for you, recent versions of Python don't just use
> 32-bit integers, but extend the values into Python's long values where
> necessary. See:
>
>  >>> (1234<<24)>>24
> 1234L
>  >>>
>
> What you really need is a logical and with 255:
>
>  >>> 1234 & 255
> 210
>  >>>
>
> Hope this helps.
>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
>
> Sorry, the dog ate my .sigline

thanks, it works!
python is cool, however, the python community is even cooler :)



From kay.schluehr at gmx.net  Sun Sep 23 02:07:22 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Sat, 22 Sep 2007 23:07:22 -0700
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <zfCdndEutb_EG2jbnZ2dnUVZ_o3inZ2d@speakeasy.net>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<1190413322.962737.53900@r29g2000hsg.googlegroups.com>
	<1190414192.636397.146450@57g2000hsv.googlegroups.com>
	<1190443748.907702.154660@22g2000hsm.googlegroups.com>
	<7xlkazgpc5.fsf@ruckus.brouhaha.com>
	<1190447257.060479.141280@n39g2000hsh.googlegroups.com>
	<5lk2olF8gic1U5@mid.uni-berlin.de>
	<1190454275.282176.90830@k79g2000hse.googlegroups.com>
	<zfCdndEutb_EG2jbnZ2dnUVZ_o3inZ2d@speakeasy.net>
Message-ID: <1190527642.681501.18900@57g2000hsv.googlegroups.com>

On 22 Sep., 23:17, Erik Max Francis <m... at alcyone.com> wrote:

> The attribute and method (not made distinct in Io; they're called
> "slots") is much the same as with Python; the current instance is
> checked for the object, then its parents, then _its_ parents, and so on.

Repeating the same point as Marc doesn't mean that I have to repeat my
reply as well. Doesn't it?



From bj_666 at gmx.net  Tue Sep 11 09:01:46 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 11 Sep 2007 13:01:46 GMT
Subject: memcpy
References: <1189449530.171049.323230@22g2000hsm.googlegroups.com>
	<5klnsbF3vfqqU10@mid.uni-berlin.de>
	<1189512598.410810.224340@y42g2000hsy.googlegroups.com>
Message-ID: <5knhtpF4b65dU6@mid.uni-berlin.de>

On Tue, 11 Sep 2007 05:09:58 -0700, Tim wrote:

> On Sep 10, 3:31 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>> On Mon, 10 Sep 2007 11:38:50 -0700, Tim wrote:
>> > How do I memcpy from a pointer to an array of floats in python?
>>
>> > I get errors: NameError: global name 'row' is not defined
>>
>> Well than the (global) name `row` is not defined.  Quite clear message,
>> isn't it?  ;-)
>>
>> > I want to be able to get the row[i] array element. In C I would
>> > normally place the address of row as the first argument.
>>
>> > cdll.msvcrt.memcpy( row, pData, 256 )
>>
>> > If I define row as the following I also get the following error:
>>
>> > row = ones( TOTAL_PARAMETER_ENTRIES, dtype=float )
>>
>> > ArgumentError: argument 1: <type 'exceptions.TypeError'>: Don't know
>> > how to convert parameter 1
>>
>> You don't give enough information so we have to guess.  For example I
>> guess the `ones()` function comes from one of the packages `numeric`,
>> `numarray` or `numpy`!?
>>
>> This function returns a Python object.  You can't use arbitrary Python
>> objects with `ctypes`.  `memcpy` expects a pointer not an object.
>
> Can I initialize something in Python that I can get access to it's
> pointer?

"It's pointer"?  Then you have a pointer to a structure that represents
the Python object but still no idea what data is at that pointer.  This is
an implementation detail of the Python version and of the particular
object.

> Here is what I would like to write:
> 
> shared_memory_pointer = windll.kernel32.MapViewOfFile(hMapObject,
> FILE_MAP_ALL_ACCESS,
>             0, 0, TABLE_SHMEMSIZE)
> 
> memcpy( self.data, shared_memory_pointer, my_size )

I haven't tested but it should be possible to declare the return type of
`windll.kernel32.MapViewOfFile()` as ``ctypes.POINTER(ctypes.c_double *
256)`` and then do:

test_data = numpy.ones(1000)
shared_memory_pointer.contents[0:256] = test_data[0:256]

Ciao,
	Marc 'BlackJack' Rintsch


From dfedoruk at gmail.com  Thu Sep 13 12:27:31 2007
From: dfedoruk at gmail.com (Dmitri Fedoruk)
Date: Thu, 13 Sep 2007 16:27:31 -0000
Subject: lxml + mod_python: cannot unmarshal code objects in restricted
	execution mode
In-Reply-To: <1189688758.587404.139360@r29g2000hsg.googlegroups.com>
References: <1189688758.587404.139360@r29g2000hsg.googlegroups.com>
Message-ID: <1189700851.771876.21350@g4g2000hsf.googlegroups.com>

On Sep 13, 5:05 pm, Dmitri Fedoruk <dfedo... at gmail.com> wrote:
> So, my configuration is the following:
> Python 2.5.1
> Server version: Apache/2.2.4 (FreeBSD)
> mod_python-3.3.1
update:
lxml-1.3.4
libxslt-1.1.21
libxml2-2.6.29




From mikael at isy.liu.se  Mon Sep 24 04:40:53 2007
From: mikael at isy.liu.se (Mikael Olofsson)
Date: Mon, 24 Sep 2007 10:40:53 +0200
Subject: about __str__
In-Reply-To: <46f37540$0$16854$426a74cc@news.free.fr>
References: <mailman.835.1190325729.2658.python-list@python.org>
	<46f37540$0$16854$426a74cc@news.free.fr>
Message-ID: <46F77815.1080007@isy.liu.se>

Bruno Desthuilliers wrote:
> def __str__(self):
>     return "<%s:%s>" % (self.commiterID_, self.commits_)

I would write that in the following way:

def __str__(self):
    return "<%(commiterID_)s:%(commits_)s>" % self.__dict__

More explicit IMHO. And easier to maintain, especially if the string 
would contain several insertions.

/MiO


From aleax at mac.com  Sat Sep  1 19:57:00 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 1 Sep 2007 16:57:00 -0700
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
	<1i3ob5k.dm3jmoqx1z68N%aleax@mac.com>
	<mailman.282.1188675876.28954.python-list@python.org>
	<5jtuabF16jr4U1@mid.uni-berlin.de>
Message-ID: <1i3rtgi.9rbs05u5rx3gN%aleax@mac.com>

Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:

> On Sat, 01 Sep 2007 13:44:28 -0600, Michael L Torrie wrote:
> 
> > Alex Martelli wrote:
> > 
> >> is the "one obvious way to do it" (the set(...) is just a simple and
> >> powerful optimization -- checking membership in a set is roughly O(1),
> >> while checking membership in a list of N items is O(N)...).
> > 
> > Depending on a how a set is stored, I'd estimate any membership check in
> > a set to be O(log N).
> 
> Sets are stored as hash tables so membership check is O(1) just like Alex
> said.

"Roughly" O(1), as I said, because of the usual issues with cost of
hashing, potential hashing conflicts, re-hashing (which requires
thinking in terms of *amortized* big-O, just like, say, list appends!),
etc, just like for any hash table implementation (though Python's, long
used and finely tuned in dicts then adopted for sets, is an exceedingly
good implementation, it IS possible to artificially construct a "worst
case" -- e.g., set(23+sys.maxint*i*2+i for i in xrange(24,199))...)


Alex


From bbxx789_05ss at yahoo.com  Sat Sep 15 18:32:48 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sat, 15 Sep 2007 15:32:48 -0700
Subject: (wxPython) wx.ProgressDialog - how to cancel out of?
In-Reply-To: <rvrme3tb8snr5rnqgf5p8g1g4ponp0nbfj@4ax.com>
References: <rvrme3tb8snr5rnqgf5p8g1g4ponp0nbfj@4ax.com>
Message-ID: <1189895568.251017.96460@22g2000hsm.googlegroups.com>

On Sep 14, 11:57 pm, Terry Carroll <carr... at nospam-tjc.com> wrote:
> I'm trying to use wx.ProgressBar, and the cancel button is not
> responding.
>
> Here is a simple program that exhibits the problem:
>
> #########################################################
> import  wx
> import time
>
> max = 10
> app = wx.PySimpleApp()
> dlg = wx.ProgressDialog("Progress dialog example",
>                        "variables to be shown here",
>                        maximum = max,
>                        style = wx.PD_CAN_ABORT
>                         | wx.PD_CAN_SKIP
>                         #| wx.PD_APP_MODAL
>                         | wx.PD_ELAPSED_TIME
>                         | wx.PD_ESTIMATED_TIME
>                         | wx.PD_REMAINING_TIME
>                         )
>
> keepGoing = True
> skip = False
> count = 0
>
> while keepGoing and count < max:
>     count += 1
>     wx.MilliSleep(1000)
>     #time.sleep(1)
>     newtext = "(before) count: %s, keepGoing: %s, skip: %s " % \
>               (count, keepGoing, skip)
>     print newtext
>     (keepGoing, skip) = dlg.Update(count, newtext)
>     newtext = "(after) count: %s, keepGoing: %s, skip: %s " % \
>               (count, keepGoing, skip)
>     print newtext
> dlg.Destroy()
> #########################################################
>
> The dialog looks right when this runs, but....  
>
> What's right: I get a progress bar;  it includes "Skip" and "Cancel"
> buttons; it shows 10 seconds of progress, and updates once per second
> with the variables' values on each iteration.
>
> What's wrong is that I can't get clicking on the "Skip" or "Cancel"
> buttons to have any effect.  Instead, as soon as the dialog displays,
> I get an hourglass, and it doesn't matter what I click on.  Here's
> what the print statements display, consistently, regardless of what I
> try to click or whether I click nothing at all:
>
> I:\python>test1.py
> (before) count: 1, keepGoing: True, skip: False
> (after) count: 1, keepGoing: True, skip: False
> (before) count: 2, keepGoing: True, skip: False
> (after) count: 2, keepGoing: True, skip: True
> (before) count: 3, keepGoing: True, skip: True
> (after) count: 3, keepGoing: True, skip: True
> (before) count: 4, keepGoing: True, skip: True
> (after) count: 4, keepGoing: True, skip: True
> (before) count: 5, keepGoing: True, skip: True
> (after) count: 5, keepGoing: True, skip: True
> (before) count: 6, keepGoing: True, skip: True
> (after) count: 6, keepGoing: True, skip: True
> (before) count: 7, keepGoing: True, skip: True
> (after) count: 7, keepGoing: True, skip: True
> (before) count: 8, keepGoing: True, skip: True
> (after) count: 8, keepGoing: True, skip: True
> (before) count: 9, keepGoing: True, skip: True
> (after) count: 9, keepGoing: True, skip: True
> (before) count: 10, keepGoing: True, skip: True
> (after) count: 10, keepGoing: True, skip: True
>
> Two oddities here:
>
> 1) As I read the docs, the keepGoing variable should be set to True,
> unless I click on "Cancel," in which case it should be set to False
> (which would end the loop).  That doesn't happen.  This is really what
> I'm most concerned here with.
>
> 2) The variable "skip: set to False on the first iteration, and then
> set to True on subsequent iterations?  Note that this happens even if
> no buttons are selected.  This is just a weirdness to me, and not my
> main concern, but I thought I'd mention it in case it's relevant.
>
> You can see some variations in the commented-out code that I tried;
> they did not help.
>
> Relevant software and releases:
>
> OS: Windows XP Home Edition, Version 2002, SP2
> Python: ActivePython 2.5.0.0
> wxPython: 2.8.1.1 (msw-unicode)
>
> Any help appreciated.

Supposedly a progress dialog does not work well on its own because
events get screwed up when there isn't a main loop.  Try this:

import wx

app = wx.PySimpleApp()

win = wx.Frame(None, -1, "Test Progress Dialog")
button = wx.Button(win, -1, "start download")

def on_button_click(evt):
    max = 10
    dialog = wx.ProgressDialog(
            "Loading",
            "progress:",
            max,
            style = wx.PD_CAN_ABORT
                |wx.PD_ELAPSED_TIME
                |wx.PD_ESTIMATED_TIME
                |wx.PD_REMAINING_TIME
    )


    keep_going = True
    skip = False
    count = 0
    while keep_going and (count < max):
        count += 1
        wx.MilliSleep(1000)

        (keep_going, skip) = dialog.Update(count)
        print skip

    dialog.Destroy()


button.Bind(wx.EVT_BUTTON, on_button_click)

win.Show()
app.MainLoop()



From tec at knology.net  Mon Sep 10 11:21:24 2007
From: tec at knology.net (Tim)
Date: Mon, 10 Sep 2007 08:21:24 -0700
Subject: shared memory pointer
In-Reply-To: <mailman.325.1189437043.2658.python-list@python.org>
References: <1189436265.841415.234050@w3g2000hsg.googlegroups.com>
	<mailman.325.1189437043.2658.python-list@python.org>
Message-ID: <1189437684.476993.130390@g4g2000hsf.googlegroups.com>

On Sep 10, 10:11 am, Tim Golden <m... at timgolden.me.uk> wrote:
> Tim wrote:
> > Hello Everyone,
>
> > I am getting shared memory in python using the following.
>
> > szName = c_char_p(name)
> > hMapObject = windll.kernel32.CreateFileMappingA(INVALID_HANDLE_VALUE,
> >             None, PAGE_READONLY, 0, TABLE_SHMEMSIZE, szName)
> > if (hMapObject == 0):
> >             print "OpenKey: Could not open name file mapping object"
> >             raise WinError()
>
> > self.pData = windll.kernel32.MapViewOfFile(hMapObject,
> >        FILE_MAP_ALL_ACCESS, 0, 0, TABLE_SHMEMSIZE)
>
> Without answering your question directly, why not use
> the stdlib mmap module, which does exactly this for
> you behind the scenes?
>
> Docs -http://docs.python.org/lib/module-mmap.html
> Example -http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/413807
>
> TJG

I saw the mmap function in the shared memory example. I had some
concern with my large memory size being written to the disk drive. I
though it might slow down my application. The reason I am writting
this new code is because the existing method using a file. I thought
shared memory would be much faster.

I have tried using the memcpy and addresses, casting, etc. Is there a
way to use memcpy with the pData returned by MapViewOfFile()?

Thanks
Tim




From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Sep 18 04:13:15 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 18 Sep 2007 10:13:15 +0200
Subject: can Python be useful as functional?
In-Reply-To: <1190073045.618869.261290@k79g2000hse.googlegroups.com>
References: <1190073045.618869.261290@k79g2000hse.googlegroups.com>
Message-ID: <46ef8895$0$21882$426a34cc@news.free.fr>

Lorenzo Stella a ?crit :
> Hi all,
> I haven't experienced functional programming very much, but now I'm
> trying to learn Haskell and I've learned that: 1) in functional
> programming LISTS are fundmental;

Not exactly. They are used quite a lot, yes, but that's also the case in 
other paradigms. What's important in functional programming is *functions*.

> 2) any "cycle" in FP become
> recursion.

FP idioms tends to use recursion instead of iteration, yes. But that's 
only viable with implementations doing tail-recursion optimisation - 
which is not the case with CPython (not that it couldn't FWIW - it's a 
design choice, and one of the few I don't necessarily agree with).

> I also know that Python got some useful tool such as map, filter,
> reduce... 

And all there itertools versions...

> so I told: "let's try some FP-style programming with
> Python!". 

Most of the functional constructs that makes sens in Python are already 
idiomatic. And some common functional stuff are better reimplemented the 
pythonic way - as an example, while partial application is usually 
implemented with closures, and *can* indeed be implemented that way in 
Python, the class-based implementation is IMHO much better.

> I took a little example of Haskell:
> 
>      listprimes :: Integer -> [Integer]
>      listprimes n = if n == 0 then sieve [2..] else sieve [2..(n-1)]
> where
>             sieve [] = []
>             sieve (p:xs) = p : sieve (filter (\x -> mod x p > 0) xs)
> 
> and I tried to "translate" it in Python:
> 
>      def sieve(s):
>          if s == []:
>              return []
>          else:
>              return [s[0]] + sieve(filter((lambda x: x % s[0] > 0),
> s[1:]))
> 
>      def listprimes(n):
>          return sieve(range(2,n))
> 
> These should be almost the same: listprimes actually lists prime
> integers up to n-1. The result is: Haskell implementation works well,
> maybe it's not the better way to do it, but it does what I wanted.
> Python implementation gives me
> 
>      RuntimeError: maximum recursion depth exceeded in cmp
> 
> My question is: how can we call a language "functional" if it's major
> implementation has a limited stack? Or is my code wrong?

Strictly speaking, a language is functional if it has functions as first 
class objects. Period. According to this definition, Python is a 
functional language. Now that doesn't mean you should try to write 
Haskell in Python... IOW, your code is not "wrong", but it's certainly 
not the best way to implement such an algorithm in Python.



From koara at atlas.cz  Sat Sep 22 11:57:30 2007
From: koara at atlas.cz (koara)
Date: Sat, 22 Sep 2007 08:57:30 -0700
Subject: unicode categories -- regex
Message-ID: <1190476650.222233.187800@57g2000hsv.googlegroups.com>

Hello all -- my question regards special meta characters for the re
module. I saw in the re module documentation about the possibility to
abstract to any alphanumeric unicode character with '\w'. However,
there was no info on constructing patterns for other unicode
categories, such as purely alphabetical characters, or punctuation
symbols etc.

I found that this category information actually IS available in python
-- in the standard module unicodedata. For example,
unicodedata.category(u'.') gives 'Po' for 'Punctuation, other' etc.

So how do i include this information in regular pattern search? Any
ideas? Thanks.


I'm talking about python2.5 here.



From surekap at gmail.com  Sun Sep 16 13:18:36 2007
From: surekap at gmail.com (Prateek)
Date: Sun, 16 Sep 2007 10:18:36 -0700
Subject: Python Database Apps
In-Reply-To: <1189713622.239555.164720@r29g2000hsg.googlegroups.com>
References: <1189479130.905136.196820@r34g2000hsd.googlegroups.com>
	<mailman.387.1189521302.2658.python-list@python.org>
	<1189536987.259907.68650@e34g2000pro.googlegroups.com>
	<mailman.438.1189600804.2658.python-list@python.org>
	<1189608814.932322.301950@22g2000hsm.googlegroups.com>
	<mailman.460.1189641373.2658.python-list@python.org>
	<1189658282.646375.160150@19g2000hsx.googlegroups.com>
	<1189713622.239555.164720@r29g2000hsg.googlegroups.com>
Message-ID: <1189963116.524203.34730@n39g2000hsh.googlegroups.com>

On Sep 14, 1:00 am, Jonathan Gardner
<jgardner.jonathangardner.... at gmail.com> wrote:
> On Sep 12, 9:38 pm, Prateek <sure... at gmail.com> wrote:
>
> > Have you checked out Brainwave?http://www.brainwavelive.com
>
> > We provide a schema-free non-relational database bundled with an app
> > server which is basically CherryPy with a few enhancements (rich JS
> > widgets, Cheetah/Clearsilver templates). Free for non-commercial use.
>
> You might want to rethink how you are handling databases. What sets
> your database apart from hierarchical or object-oriented databases? Do
> you understand why people prefer relational databases over the other
> options? There's a reason why SQL has won out over all the other
> options available. You would do well to understand it rather than
> trying out things we already know do not work.


I didn't mention any details in my previous post. Basically, the
Brainwave database is very similar to an RDF triple store which
captures semantic information.
There are some fundamental differences however, (e.g. a simplified
API, no schema, ability to store objects by introspecting and breaking
it up into its primitives etc.)

In general, it works well if you're dealing with a lot of unstructured
data or even semi-structured/structured data where the structure is
constantly changing. Key areas of benefit are in terms of integrating
legacy databases and also analytics heavy applications. This is
because there is no concept of normalized/denormalized schemas so your
data does not need to go through any structural transformations in
preparation for OLAP use.

Since we're new, I probably won't recommend using it with very very
large data-sets. However, we've seen significant benefits with small
and medium sized data-sets. At any rate, whatever you choose, you can
import and export all data in CSV/XML at any time so your data is
safe.

Some of the benefits I have described above have been shown to be
areas of concern when dealing with SQL stores. There is a lot of
research and many opinion pieces available on this subject. I'd be
happy to discuss any aspect with you further.

Sorry for the delayed response. I've been in and around airplanes for
the last 24 hours (and its not over yet).

-Prateek



From rcdailey at gmail.com  Tue Sep 25 17:21:08 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Tue, 25 Sep 2007 16:21:08 -0500
Subject: Regular Expressions: Can't quite figure this problem out
In-Reply-To: <op.ty6ztgx0x6zn5v@gabriel2.softlabbsas.com.ar>
References: <496954360709241737o6e42e7efk29886b5631f6ca2e@mail.gmail.com>
	<a49e45f50709241827i107d0acav28431853ef403702@mail.gmail.com>
	<496954360709241853w6bb6e813ved0ec4fc80304d51@mail.gmail.com>
	<op.ty6tjyfqx6zn5v@gabriel2.softlabbsas.com.ar>
	<496954360709241917m3801e4aavee29cfef7deaf41b@mail.gmail.com>
	<fd9rs6$8b2$1@sea.gmane.org>
	<496954360709241951h6901d60etf2c4b3b5ec759f2a@mail.gmail.com>
	<op.ty6ztgx0x6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <496954360709251421l578b9dfdwcc0e67d293ede1f3@mail.gmail.com>

One thing I noticed is that it is placing an arbitrary space between " and
/>. For example:


<root><frame type="image" /></root>

Notice that there's a space between "image" and /></root>

Any way to fix this? Thanks.

On 9/24/07, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>
> En Mon, 24 Sep 2007 23:51:57 -0300, Robert Dailey <rcdailey at gmail.com>
> escribi?:
>
> > What I meant was that it's not an option because I'm trying to learn
> > regular
> > expressions. RE is just as built in as anything else.
>
> Ok, let's analyze what you want. You have for instance this text:
> "<action></action>"
> which should become
> "<action/>"
>
> You have to match:
> (opening angle bracket)(any word)(closing angle bracket)(opening angle
> bracket)(slash)(same word as before)(closing angle bracket)
>
> This translates rather directly into this regular expression:
>
> r"<(\w+)></\1>"
>
> where \w+ means "one or more alphanumeric characters or _", and being
> surrounded in () creates a group (group number one), which is
> back-referenced as \1 to express "same word as before"
> The matched text should be replaced by (opening <)(the word
> found)(slash)(closing >), that is: r"<\1/>"
> Using the sub function in module re:
>
> py> import re
> py> source = """
> ... <root></root>
> ... <root/>
> ... <root><frame type="image"><action></action></frame></root>
> ... <root><frame type="image"><action/></frame></root>
> ... """
> py> print re.sub(r"<(\w+)></\1>", r"<\1/>", source)
>
> <root/>
> <root/>
> <root><frame type="image"><action/></frame></root>
> <root><frame type="image"><action/></frame></root>
>
> Now, a more complex example, involving tags with attributes:
> <frame type="image"></frame>  -->  <frame type="image" />
>
> You have to match:
> (opening angle bracket)(any word)(any sequence of words,spaces,other
> symbols,but NOT a closing angle bracket)(closing angle bracket)(opening
> angle bracket)(slash)(same word as before)(closing angle bracket)
>
> r"<(\w+)([^>]*)></\1>"
>
> [^>] means "anything but a >", the * means "may occur many times, maybe
> zero", and it's enclosed in () to create group 2.
>
> py> source = """
> ... <root></root>
> ... <root><frame type="image"></frame></root>
> ... """
> py> print re.sub(r"<(\w+)([^>]*)></\1>", r"<\1\2 />", source)
>
> <root />
> <root><frame type="image" /></root>
>
> Next step would be to allow whitespace wherever it is legal to appear -
> left as an exercise to the reader. Hint: use \s*
>
> --
> Gabriel Genellina
>
> --
> http://mail.python.org/mailman/listinfo/python-list
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From paul.hankin at gmail.com  Thu Sep 20 15:24:46 2007
From: paul.hankin at gmail.com (Paul Hankin)
Date: Thu, 20 Sep 2007 19:24:46 -0000
Subject: A struct for 2.4 that supports float's inf and nan?
In-Reply-To: <1190315989.268629.37520@22g2000hsm.googlegroups.com>
References: <mailman.784.1190235594.2658.python-list@python.org>
	<1190315989.268629.37520@22g2000hsm.googlegroups.com>
Message-ID: <1190316286.963227.324260@57g2000hsv.googlegroups.com>

Both str(f) should be str(a) in pack_one_safe.
--
Paul Hankin



From skulka3 at gmail.com  Thu Sep 27 18:27:17 2007
From: skulka3 at gmail.com (Salil Kulkarni)
Date: Thu, 27 Sep 2007 17:27:17 -0500
Subject: Streaming files from python cgi
Message-ID: <dcf8c0bf0709271527y37546e0an705f00bc5938eb0c@mail.gmail.com>

Hello,

I am trying to create a cgi which downloads a pdf/tiff file from an
ftpserver using ftplib.
Everything works until this point.
But, once the file has been retrieved, I want to be able to stream the file
to the browser so that the user gets an option to save it, or open it with
the necessary application. However, I am not able to figure out how this can
be done.

The code looks as follows:

     #!/usr/local/python2.1/bin/python

     import Path, cgi, sys, os
     from ftplib import FTP
     print "content-type: application/pdf\n\n"

      ftp = FTP("hostname", "salil", "passwd")

      try:
          ftp.cwd("/home/salil")
      except:
          print "Could change directory on remote server"
          sys.exit(1)


      f = open("temp.pdf", "w")
      ftp.retrbinary("RETR O_F.pdf", f.write)
      f.close()
      f = open("temp.pdf", "r")
     print f.read()


I am using Apache 1.3 for this cgi. It would be great if someone can point
out how this can be accomplished, or if there are any examples out there
which I can refer to.

Thanks,
Salil.
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From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Sep 21 03:23:41 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 21 Sep 2007 09:23:41 +0200
Subject: An Editor that Skips to the End of a Def
In-Reply-To: <874phou1pa.fsf@benfinney.id.au>
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk>
	<tfAIi.51111$Um6.44314@newssvr12.news.prodigy.net>
	<YPGIi.54591$YL5.26012@newssvr29.news.prodigy.net>
	<874phou1pa.fsf@benfinney.id.au>
Message-ID: <46f3717e$0$29940$426a74cc@news.free.fr>

Ben Finney a ?crit :
> "W. Watson" <wolf_tracks at invalid.com> writes:
> 
>> Is vim just an editor or is it capable of running and debugging a
>> program, as well?
> 
> (Please don't top-post. Instead, reply below each point to which
> you're responding, removing quoted text irrelevant to your response.)
> 
> Both Emacs and Vim are highly customisable text editors. They are
> configurable with complete programming languages specific to the
> program, and both have a huge community of programmers writing useful
> extensions.
> 
> So, neither of them is "just an editor"; they are editors at their
> core, that can become complete programming environments by taking
> already-written components for them. 

FWIW, emacs has

- a python-mode that let you run either your whole script or parts of it 
into a python shell - that of course stays open, so you can examine the 
state after execution etc... and it works just fine with pdb.
- ECB (emacs-code-browser), that adds a file explorer and 
functions/classes inspector

The combination gives you a full-blown IDE.


From stefan.behnel-n05pAM at web.de  Tue Sep 25 03:32:21 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Tue, 25 Sep 2007 09:32:21 +0200
Subject: Python script to optimize XML text
In-Reply-To: <mailman.1018.1190687230.2658.python-list@python.org>
References: <496954360709241336i43173947sda5245c2d7477ecb@mail.gmail.com>
	<mailman.1018.1190687230.2658.python-list@python.org>
Message-ID: <46F8B985.7000803@web.de>

Gabriel Genellina wrote:
> En Mon, 24 Sep 2007 17:36:05 -0300, Robert Dailey <rcdailey at gmail.com>
> escribi?:
> 
>> I'm currently seeking a python script that provides a way of
>> optimizing out
>> useless characters in an XML document to provide the optimal size for the
>> file. For example, assume the following XML script:
>>
>> <root>
>>     <Test></Test>
>>     <!-- <CommentedOutElement/> -->
>>
>>     <!-- Do Something Else -->
>> </root>
>>
>> By running this through an XML optimizer, the file would appear as:
>>
>> <root><Test/></root>
> 
> ElementTree does that almost for free.

As the OP is currently using lxml.etree (and as this was a cross-post to
c.l.py and lxml-dev), I already answered on the lxml list.

This is just to mention that the XMLParser of lxml.etree accepts keyword
options to ignore plain whitespace content, comments and processing
instructions, and that you can provide a DTD to tell it what whitespace-only
content really is "useless" in the sense of your specific application.

Stefan


From jd at nospam.com  Fri Sep 21 13:36:34 2007
From: jd at nospam.com (Jd)
Date: Fri, 21 Sep 2007 10:36:34 -0700
Subject: threading.local _threading_local problems
Message-ID: <wvednQdqvJ0jnWnbnZ2dnUVZ_tOdnZ2d@comcast.com>

Hi
  I have the following situation.. Have a worker thread, that does the
"work" given to it. While doing work, some of the objects use thread
local storage for storing that requires explicit close. e.g. connection
handles. These objects are long living. The worker, does not have any
direct access to the objects.

  I would like to clean up thread local area explicitly so that I do not
run out of connection handles. Any ideas on how to access local storage
from the thread ? (threading.local() gives new object everytime.. I am
looking for something like singleton / global access from within the thread)

  Or is there anyway to notify the object when the thread for which it
set the local storage is going away ?

   This looks to me a bit like design shortcoming. or I have missed
something completely.

Thanks
/Jd



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Sep 21 08:35:37 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 21 Sep 2007 14:35:37 +0200
Subject: An Editor that Skips to the End of a Def
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk> <fd0au1$fro$1@lust.ihug.co.nz>
Message-ID: <5lhs4pF8bkunU1@mid.individual.net>

Lawrence D'Oliveiro wrote:
> After two decades of putting up with vi just to ensure
> compatibility with every proprietary *nix system I might come
> across, let me just say ...
> 
> USE EMACS!

Nah. Use vim.

> Oh, and
> <http://ars.userfriendly.org/cartoons/?id=20070910&mode=classic>.

Esc-Meta-Alt-Ctrl-Shift? :)

Regards,


Bj?rn

-- 
BOFH excuse #418:

Sysadmins busy fighting SPAM.



From yosuke at ccwf.cc.utexas.edu  Mon Sep 17 20:00:09 2007
From: yosuke at ccwf.cc.utexas.edu (yosuke at ccwf.cc.utexas.edu)
Date: Tue, 18 Sep 2007 00:00:09 +0000 (UTC)
Subject: class that keeps track of instances
References: <fcmu0m$61c$1@geraldo.cc.utexas.edu>
Message-ID: <fcn4e9$8ij$1@geraldo.cc.utexas.edu>

yosuke at ccwf.cc.utexas.edu wrote:

> I want to have a class in my python application that does not allow
> multiple instance with same "name".  

Thank you very much for very quick and precise answers to my questions!
input for garbage collector and id are appreciated as well.  I head to
bookstore for the cookbook (O'reily's, right?).  i thought it was too
cryptic but maybe time for met to revisit the book.

-- 
yosuke kimura
Center for Energy and Environmental Resources
The Univ. of Texas at Austin, USA


From bj_666 at gmx.net  Tue Sep 11 13:50:43 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 11 Sep 2007 17:50:43 GMT
Subject: Car-ac-systems
References: <cd6dnW0Vf8-wOnvbRVnyhwA@eclipse.net.uk>
	<b0ac48a01b8bb8c9c2b92ff03bf0@msnews.microsoft.com>
	<1189532573.728913.306470@g4g2000hsf.googlegroups.com>
Message-ID: <5ko2rjF4om2bU1@mid.uni-berlin.de>

On Tue, 11 Sep 2007 17:42:53 +0000, Zentrader wrote:

> <snip>
> What is it about "please do not top-post" that you have difficulty
> understanding? Or do "MVP"s feel that their time is so much more
> valuable than anyone else's that they are free to ignore the norms?
> 
> Who made this the norm?

Common sense and (western) reading habits.

> In my travels through web-land, it appears to be the opposite.

You must travel strange territories.  ;-)

> Don't waste space repeating everything in every post, and it wastes
> everyone's time by have to go over the same thing again and again.

That's why you trim the quoted part to the minimum to understand what one
is answering.  Top posting and full quoting wastes time for people who
want to see the context because context and answer are way apart and in the
wrong order so one has to scroll back and forth to keep track of the
discussion.

Ciao,
	Marc 'BlackJack' Rintsch


From frgo at goenninger.net  Sat Sep 29 06:54:32 2007
From: frgo at goenninger.net (Frank Goenninger)
Date: Sat, 29 Sep 2007 12:54:32 +0200
Subject: The Modernization of Emacs: terminology buffer and keybinding
References: <13frd6vtarbee75@corp.supernews.com>
Message-ID: <fdlat6$c5f$03$1@news.t-online.com>

On 2007-09-29 01:27:04 +0200, Damien Kick <dkixk at earthlink.net> said:

> Giorgos Keramidas wrote:
>> On Fri, 22 Jun 2007 23:08:02 -0000, nebulous99 at gmail.com wrote:
>>> So much for the "free" in "free software". If you can't actually use
>>> it without paying money, whether for the software or for some book, it
>>> isn't really free, is it?
>> 
>> Please do not confuse the term 'free' in 'free software' with 'gratis'.
>> 
>> 'Gratis', i.e. 'lacking a monetary price tag' is something *very*
>> different from the meaning of 'free' in 'free software'.
> 
> If you were referring to the "free" in "free Mumia Abu Jamal", I would 
> agree with you.  I don't think anyone would imagine that this phrase 
> meant that someone was going to get Mumia Abu Jamal gratis.  Like it or 
> not, "free software" referring to "free as in beer" is probably the 
> most common interpretation of the phrase for a native English speaker. 
> Admittedly, I do not have a "scientific" survey handy.  However, I just 
> asked my wife--who has absolutely no interest in anything related to 
> programming, has never heard of the FSF, Eric Raymond, nor the 
> disagreement between those two camps, nor probably will she ever have 
> an interest--what she thinks I mean when I say "free software".  After 
> getting over the "why are you asking such a stupid question" phase, the 
> first thing that jumped to her mind was "free as in beer".  You can 
> stamp, growl, swagger, spit, curse, and bluster all you want on this 
> point, but millions of English speakers are going to ignore you anyway. 
>   Lucky for most of them, they do not have to suffer the lectures of 
> sociopolitically motivated language mavens trying to "correct" them 
> from the error of mistaking the meaning of a phrase to be the normal 
> meaning of that phrase.

Fully true for non-native English speakers as well. Just did the "wife 
test" also - she is a pure software user - and yes, free is "no money, 
do what you want" and that's it.

I *never* use the term "free" if I don't want to imply "free beer" 
(which is a Good Thing and as such highly valuated - ask any Bavarian). 
Using "free" as by FSF or any other lawyer-style 6 pixel font printed 
phrasing is pure perfidiousness.

Frank

-- 
  Frank Goenninger

  frgo(at)goenninger(dot)net

  "Don't ask me! I haven't been reading comp.lang.lisp long enough to 
really know ..."

	



From kasimmominov at gmail.com  Sat Sep 29 06:10:50 2007
From: kasimmominov at gmail.com (kasim)
Date: Sat, 29 Sep 2007 10:10:50 -0000
Subject: 4000 every month
Message-ID: <1191060650.145937.294850@y42g2000hsy.googlegroups.com>


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Thanks

1.	Hi everyone,
For all of you that are asking for caculations for how much pay, just
consider this.
There is truly no way anyone can calculate with all variables. The pay
is dependent upon the advertisers paying agloco, the search engines
paying agloco, the merchants paying agloco the commissions on the
sales to agloco members, and any other sources of income. This money
all goes into a pool, of which agloco management gets 10% and the rest
is divided among the owners/members. There you have it. income is
variable, percentages for management and the owners ia fixed.
membership is variable. These variable parts will change by the
minute. No reasonable mathmatician will attempt to arrive at
meaningful calculations with two massive variables and one fixed
quantity. All the mathmatician can do at this point is offer
statistical possibilities. In the short view, every person you sponsor
now cuts down on the value of the cash pool individually. In the
longer term, more members means agloco can charge more for the ads and
make the cash pool larger. As far as clicking the ads, That will
create cash pool money when the few make purchases and the merchant
pays agloco the commission on the sale. In at least some cases, the
member will immediately benefit from any discounts that are given to
the agloco membership. Regards searches, I do not know what deal
agloco has with google or the other search engines at this time, but I
do know that as the membership goes up, so does the price google and
the others will pay agloco for each search performed. Google currently
pays aol 10 cents per search performed. Best I can tell you is the per
hour pay will fall into a range somewhere between .00001 cents and
1,000.00 dollars per hour.( both top and bottom values estimated with
the fact that everyone is so desparate for promises that poor Brian
cannot say anything without it being considered a set in concrete
promise.) I intentionally used extremes. Try to keep your shirt on and
wait and see what materializes.



       - CEV?Z D?KEN ?L?R ( YANLI? )
    - CEV?Z D?KEN ?OK YA?AR ( DO?RU )

    ?lkemizin k?y?lar?ndan, ovalar?ndan ba?layarak yayla ve da?lar?na
var?ncaya kadar her y?kselti ve mesafede yay?l?? g?sterebilen ender
a?a?lardan biri olan ceviz a?ac? hakk?nda  ne yaz?k ki bir?ok hurafe
uydurulmu?tur. Bunlardan biri de "Ceviz diken ?l?r." s?z?d?r. "Ceviz
diken ?l?r" s?z? asl?nda ?u ?ekildedir. "Ceviz diken, beli kal?nl???na
gelince ?l?r". Bu  s?z?n "beli kal?nl???na gelince" si k?sa olsun
diye kald?r?lm??, geriye, "Ceviz diken ?l?r"  s?z? kalm??. Olay budur.
Yoksa halk?m?z, ceviz  hakk?nda bu kadar t?rk? yakar m?, bu kadar
deyimler s?yler mi, bu kadar ?iirler yazar m?? ?rne?in; Hamit' li A??k
Dursun Kaya bak?n ne demi?:


         Fidan b?y?r ye?il yaprak dal olur,

        Hayat verir oksijeni bol olur,

        ?eyiz olur, sand?k olur, sal olur,

        Ceviz diken ?ok ya?ayan can olur.


     Di?er yandan resimde g?r?len Bolu/ Mudurnu il?esinin Da?yolu
k?y?nde 86 ya??ndaki ki?i, askerden geldi?inden bu yana k?y?n i?ine ve
civar?na, buldu?u bo? yerlere devaml? ceviz dikmi?, say?s?n? kendisi
bile bilmiyor. Ayr?ca kendim (Selami Bayrak) 1967 y?l?ndan bu yana
devaml? ceviz dikiyorum. ?lmeyi bir tarafa b?rak?n ceviz sayesinde
sa?l?kl?y?m ve ikinci bahar?m? ya??yorum.


         Ceviz meyvesini tan?mayan biri, ye?il kabuklu cevizi elma
zannederek ?s?r?p yemeye kalkm??, a?z? burulunca "Bu meyve
olgunla?mam??" diye yere atm??.Bu olaydan  anla??laca?? gibi ?nsanlar
ve Toplum bazen bir  i?in asl?n? ??renmeden  YANLI?  karar
verebiliyorlar


" Torunlar?m?za iyi bir d?nya b?rakabilecek miyiz?"

CEV?Z SERA GAZINI AZALTIR

    Ceviz yapra?? Karbon S?lf?r gaz? salg?lar. Bu gaz, havadaki di?er
gazlardan a??r oldu?u i?in cevizin alt?na iner. Yaz?n s?cakta cevizin
kaba g?lgesine oturan insan, haliyle bu gazdan etkilenerek biraz
sersemler. Cevizin kaba g?lgesinden dolay? dibinde ot bitmedi?i de
g?r?l?nce cevizin zehirli gaz salg?lad??? d???ncesi a??rl?k kazan?r.
Kesinlikle bu do?ru de?ildir. Bug?ne kadar cevizin dibinde oturan
insan?n veya yatan hayvan?n ?ld??? duyulmam??t?r.

    Grafik' te g?r?ld??? gibi, cevizin insan? ?ld?rd??? de?il tam
aksine ya?att??? bilimsel olarak da ispatlanm??t?r. ?te yandan ceviz
a?ac?n?n, sera gaz?n? olu?turan Karbondioksiti emerek OZON
tabakas?ndaki deli?in b?y?mesini ve k?resel ?s?nmay? engelledi?i
g?r?lmektedir. (Reyhan OKSAY, Cumhuriyet Bil. Tek. Der.) Di?er yandan
ABD Ulusal Birlik Akademisi' nin a??klamas?na g?re; Karbondioksit ve
Metan gazlar?, 12000 y?l uygun bir d?zeyde kald?ktan sonra 20.
y?zy?ldan ba?layarak keskin bir y?kseli? sonucu sera etkisi yapmaya
ba?lam??t?r ( 24.06.2006 Tarihli TRT Teletex'inin 166. sayfas?)


- As?rlard?r y?zlerce ceviz a?a?lar? aras?nda bulunan bir mahalle, ?u
anda 81 ya??nda olan mahalle sakinlerinden A??t OMUZ,  "Bug?ne kadar
mahalleye ne y?ld?r?m d??t???n? g?rm?? ne de i?itmi?" ( Yandaki Resim-
Liman Mh. Bah?esaray / VAN, 2001)


- ?? Anadolu'nun k?ra? bir yerinde, etraf?nda tek bir a?ac?n dahi
bulunmad??? devasa bir ceviz a?ac?. Bu ve buna benzer ceviz
a?a?lar?nda bir tek y?ld?r?m izi g?r?lmemi?tir. (K?r?ehir, 1995)


" O, 300 y?ld?r orada ya??yor, ya biz?" (Foto?raf: Selami Bayrak,
2003)

   Kastamonu, Do?anyurt il?esi Kayran K?y?'nde denize 100 m. mesafede,
neredeyse 0 rak?mda 3 Da. yeri kaplayan, an?t olabilecek bir ceviz
a?ac?. Ka? nesle miras kal?yor?

     - Ceviz, en uzun ?m?rl? meyve a?a?lar?n?n ba??nda gelmekte olup,
1000 y?l ya?ayabilmektedir.

     - Gordiyon (Beypazar?/ Ankara) Kral mezar? kaz?lar?nda ortaya
??kar?lan buluntular aras?nda 2700 y?l ?nce ceviz a?ac?ndan yap?lm??
mobilyalara rastlanm??t?r. Bunlar masif olarak, k?vr?k masa bacaklar?,
?? ayakl? d?z masa tablas? ve "pagoda" masa ?st? (tabla) d?r. (Prof.
Dr. Burhan Aytu?, Do?. Dr. Ertu?rul G?rcelio?lu, ?.?.Orman Fak?ltesi,
1987)

     - En ?ok meyve veren ceviz a?ac?, K?r?m'da Balaklava yak?n?ndaki
Bayd?r Vadisi'nde yeti?en cevizlerdir. Burada bir ceviz a?ac? y?lda
100 000 ceviz verir( ort. 800 Kg.). ?lkemizde ise Ankara Beypazar?
il?esinin Sekli k?y?nde 50 000 adet ( 650 Kg.) , K?r?ehir'in Kaman
il?esinde 47 000 adet ( 600 Kg.) veren cevizler bulunmaktad?r.

     - D?nyan?n en b?y?k organik cevizinin K.Mara?'da yeti?tirildi?i
ortaya ??km??t?r. Cevizin;

                                     Kabuklu a??rl???  28 gr.
                                     ?? a??rl??? ise 17 gr.
gelmi?tir.
                                     Rand?man % 61' dir.

    Not: Standart ?l??ler: Kabuklu a??rl?k en az 10 gr. , i? a??rl?k
ise en az 5 gr. d?r. (Gazete Haberi: S?t?? ?mam ?niversitesi Rekt?r
Prof. Dr. Osman Tekinel'den yap?lan a??klama)

    - D?nyan?n en de?erli ceviz g?vdeleri Anadolu' da yeti?mektedir.
??nk? bu g?vdeler Ur'ludur. Ur ve benzeri ?i?kinliklerden "Ayna" ad?
verilen desenli levhalar elde edilir. Ayr?ca Anadolu cevizi,
di?erlerine nazaran i?lenmi? y?zeylerde koyu renkli ?izgi, ?erit veya
par?alar?n meydana getirdi?i g?zel ?ekillere sahiptir. Bu nedenle
kaplamac?l?k de?eri ?ok ?st?nd?r.


        - Nitekim, Kud?s' teki Mescidi Aksa' n?n minberinin asl?na
uygun olarak yeniden yap?lmas?nda kullan?lacak ceviz a?a?lar?n?n
yurtd???na ??kar?lmas? i?in Bakanlar Kurulunca ?zel kararname
??kar?lm??t?r. 15 m? ceviz a?ac?na 36.000 dolar de?er bi?ilmi?tir. Bu
durumda 1 m?' ? 2.400 dolara gelmektedir ( Gazetelerden)

"Fakire Kat?k, ustaya K?t?k"
     - Cevizin ya?l? oldu?u ve insanlara dokundu?u zannedilmektedir.
Cevizin ya?l? oldu?u do?rudur. Ancak Cetvelde g?r?ld??? gibi, ortalama
%60 olan bu ya??n neredeyse %91'i doymam?? ya?d?r.

    Doymam?? ya? asitleri, kan kolesterol' u birikimini ?nleyici
etkiye sahiptir. Bu ya? asitlerinin bir k?sm? ne v?cut taraf?ndan
yak?lmakta, ne de hayvansal ya?larda bulunmaktad?r.

   Oysa bu ya? asidinin b?y?k bir k?sm? (%61) cevizde bulunmaktad?r.
Yine doymam?? ya? asitlerinin baz?lar?, kan?n p?ht?la?mas?n?
durdurmakta ve bu sayede koroner damarlar?n t?kanmas?n? ?nleyerek KALP
KR?Z?'nin ?n?ne ge?mektedir.

   Atardamarlarla beslenen dokular besin maddelerinden ve oksijenden
mahrum kalarak ?lebilirler. Bu durum, beyinde meydana gelirse fel?,
kalp damarlar?nda meydana geldi?indeyse kalp krizi olmaktad?r.

        - ?nsan beyninde milyonlarca sinir h?cresi ( n?ron ) vard?r.
V?cut yeni sinir h?creleri ?retmez. Fakat beslenme ve kullanma ile
kapasitesi artar. Do?umdan ?nce b?y?k bir h?zla ( dakikada 250 000
kadar ) olu?an sinir h?creleri ?remesi do?umdan sonra tamamen durur.
?len sinir h?creleri yerine yenileri gelmez. Cevizin, insan v?cudunun
?ok ?nemli organ? olan kalp ve beyine benzemesi bo?una de?ildir.
Yukar?daki resimlerde g?r?ld??? gibi, ?in cevizi (J. Ailantiolfa) ayn?
kalp ?eklinde,  ceviz i?lerinin ise beyin ?eklinde oldu?u a??k?a
g?r?lmektedir.

    - N?tr besinlerden olan ceviz meyvesi rahatl?kla di?er besinlerle
yenebilir. Milyarlarca h?crenin bir araya gelerek birle?mesinden
ortaya ??kan organlar insan v?cudunda bir?ok sistem meydana
getirir.Dola??m, sindirim, sinir, solunum ve ?reme gibi. Cevizin
bile?imindeki besinlerin, mineral ve vitaminlerin bu sistemler
?zerinde ?ok b?y?k etkileri vard?r.


       ?rne?in; ceviz, kolesterol' ? d???r?r, damarlar? a?ar,
kans?zl??? giderir, kalp krizi ve fel? riskini d???r?r, ?eker
hastal???na faydal?d?r, cinsel g?c? art?r?r, strese iyi gelir, vereme
kar?? korur, ?ks?r??? keser, guatra iyi gelir, sivilce ve yaralar?n
iyile?mesinde etkilidir, sindirim sistemine iyi gelir, kab?zl??? ve
ishali ?nler, parazitleri d???r?r.

     - Bu ?ok de?erli meyveyi t?ketirken i?inin k?fl? ve kabuk
renginin ?ok parlak olmamas?na dikkat etmeliyiz. Kabuklar? ?ok parlak
olan ve anormal g?r?n??l? olan cevizler maalesef kimyasal etkilerle
parlat?ld??? i?in ?ok zararl?d?r. ?? olarak t?ketece?imiz zaman
kabu?undan ??kar?p taze olarak t?ketirsek k?flenmeyi ?nlemi?
oluruz.

   "Sertifikal? fidanlarla bah?e kurarsan?z buradan elde edece?iniz
?r?nleri EUROGAP ?er?evesinde i? ve d?? piyasalarda
pazarlayabilirsiniz. Bu t?r bir organize i?inde ?retilen i? cevizin
fiyat? a?a??da g?r?lmektedir.
Bas?ndan, 2006 Ara

    Besleyici meyvesi, ?ok de?erli g?vdesi ile ceviz; insanlara
sa?lad??? sonsuz yararlar?ndan dolay? halk deyimlerinde ve t?rk?lerde
s?k?a yer alm??t?r.


http://kgsm.websitesiekle.com/



From jstroud at mbi.ucla.edu  Wed Sep  5 14:23:04 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 05 Sep 2007 11:23:04 -0700
Subject: Text processing and file creation
In-Reply-To: <1189008809.718361.45790@g4g2000hsf.googlegroups.com>
References: <1189008809.718361.45790@g4g2000hsf.googlegroups.com>
Message-ID: <fbms68$dsi$2@daisy.noc.ucla.edu>

malibuster at gmail.com wrote:
> I have a text source file of about 20.000 lines.
>>From this file, I like to write the first 5 lines to a new file. Close
> that file, grab the next 5 lines write these to a new file... grabbing
> 5 lines and creating new files until processing of all 20.000 lines is
> done.
> Is there an efficient way to do this in Python?

You should use a nested loop.

> In advance, thanks for your help.
> 

You're welcome.

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

http://www.jamesstroud.com/


From steve at REMOVE-THIS-cybersource.com.au  Wed Sep 19 20:30:52 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Thu, 20 Sep 2007 00:30:52 -0000
Subject: cannot create my own dict
References: <slrnff260r.43o.hat@se-162.se.wtb.tue.nl>
	<46f17c26$0$26298$426a74cc@news.free.fr>
Message-ID: <13f3fpsa0133142@corp.supernews.com>

On Wed, 19 Sep 2007 21:43:59 +0200, Bruno Desthuilliers wrote:

>> So if copying all methods of a native dictionary is not enough, what
>> should I do to make my class work as a dictionary WITHOUT deriving from
>> dict (which will obviously work).
>> 
>> 
> Sorry, I missed this last requirement. BTW, why don't you want to
> subclass dict ?

Possibly because it is a learning exercise?


-- 
Steven.


From ldo at geek-central.gen.new_zealand  Fri Sep  7 20:42:40 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 08 Sep 2007 12:42:40 +1200
Subject: Best practice prompting for password
References: <mailman.219.1189171663.2658.python-list@python.org>
Message-ID: <fbsr60$efc$3@lust.ihug.co.nz>

In message <mailman.219.1189171663.2658.python-list at python.org>, GiBo wrote:

> what's the best practice to securely prompt user for password on console
> in Python? IIRC some programs like SSH do a lot to ensure that the input
> comes from TTY and is not redirected from somewhere and several other
> checks.

Does it? Why bother?

It's not where the password comes _from_ that you have to be careful about,
it's what you do with it after you get it.


From duncan.booth at invalid.invalid  Tue Sep  4 03:37:49 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 4 Sep 2007 07:37:49 GMT
Subject: parameter list notation
References: <1188882028.165803.316540@r34g2000hsd.googlegroups.com>
Message-ID: <Xns99A157CCCCB25duncanbooth@127.0.0.1>

TheFlyingDutchman <zzbbaadd at aol.com> wrote:

> I am trying to use a database written in Python called buzhug.
> 
> In looking at some of the functions I see this prototype:
> 
>     def create(self,*fields,**kw):
> 
> I am not clear on what the * and the ** are for or what they
> represent. Or, what are they referred to as so I can do a query for
> information on them.
> 
You could try searching for 'function definitions'. That might lead you to 
http://docs.python.org/ref/function.html "Python Reference Manual, 7.6 
Function definitions":

> Function call semantics are described in more detail in section 5.3.4.
> A function call always assigns values to all parameters mentioned in
> the parameter list, either from position arguments, from keyword
> arguments, or from default values. If the form ``*identifier'' is
> present, it is initialized to a tuple receiving any excess positional
> parameters, defaulting to the empty tuple. If the form
> ``**identifier'' is present, it is initialized to a new dictionary
> receiving any excess keyword arguments, defaulting to a new empty
> dictionary. 


From paul.nospam at rudin.co.uk  Mon Sep 17 11:57:24 2007
From: paul.nospam at rudin.co.uk (Paul Rudin)
Date: Mon, 17 Sep 2007 16:57:24 +0100
Subject: how to join array of integers?
References: <1189859762.563599.269270@g4g2000hsf.googlegroups.com>
	<a23effaf0709150551g19c611eqe1c912acf02306d3@mail.gmail.com>
	<mailman.577.1189864628.2658.python-list@python.org>
	<13eos6ihf2mjg4a@corp.supernews.com> <87lkb6o4bx.fsf@rudin.co.uk>
	<13erbtbos7ld123@corp.supernews.com>
Message-ID: <87hcltnv2z.fsf@rudin.co.uk>

Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> writes:

> On Sun, 16 Sep 2007 19:25:22 +0100, Paul Rudin wrote:
>
>>> The generator expression takes about twice as long to run, and in my
>>> opinion it is no more readable. So what's the advantage?
>> 
>> If you do it with a decent size list they take more or less the same
>> time. 
>
> Did you try it, 

Yes.

> or are you guessing? 

Well - I guessed first, otherwise it wouldn't have been worth trying :)

> What do you call a decent size?

I used 10,000.

>
>
>> You'd presumably expect the generator to use less memory; which
>> might be an advantage if you have large lists.
>
> Unfortunately, Python doesn't make it as easy to measure memory use as it 
> does to time snippets of code, so that's just a hypothetical.

Well - as it turns out the list gets made anyway by the join method,
so in this case there's probably little difference. However there
(obviously) are siturations where a generator is going to save you a
significant memory over the similar list comprehension.

>
>
>> Isn't it odd that the generator isn't faster, since the comprehension
>> presumably builds a list first and then iterates over it, whereas the
>> generator doesn't need to make a list?
>
> Who says it doesn't need to make a list? string.join() needs a sequence.
>

The generator doesn't make a list. The implementation of str.join does
apparently needs a sequence and so makes a list from the generator
passed to it, which is presumably why you get essentially the same
performance once you factor out setup noise for small lists.

Although it's not clear to me why the join method needs a sequence
rather than just an iterator.


From robert.rawlins at thinkbluemedia.co.uk  Tue Sep 18 08:14:22 2007
From: robert.rawlins at thinkbluemedia.co.uk (Robert Rawlins - Think Blue)
Date: Tue, 18 Sep 2007 13:14:22 +0100
Subject: Wait For Application Start
Message-ID: <008701c7f9ed$72996790$57cc36b0$@rawlins@thinkbluemedia.co.uk>

Hello Guys,

 

I'm kick starting my application using the inittab to ensure its re-spawned
if it dies. However I need to ensure several other applications and service
are up and running before my application is started, things such as dbus and
a couple of other hardware stacks.

 

A concept I've been advised to use is that I should make the application
wait for the existence of a file before it starts, then create that file on
the FS using the rc.local file which is called at the end of all other start
items. Only once that file exists will my application commence with its job.

 

This seems like a very logical method, but I'm not sure how to implement it
into my python code? Is there a simple way to make it wait for that file?
Without the need to build my own conditional loop?

 

Can anyone perhaps help with a simple code example?

 

Thanks guys,

 

Rob

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From mydomdom at gmail.com  Fri Sep 14 10:27:53 2007
From: mydomdom at gmail.com (Dominique)
Date: Fri, 14 Sep 2007 14:27:53 +0000 (UTC)
Subject: Install Mac OS X - Idle doesn't show up
References: <mailman.530.1189773306.2658.python-list@python.org>
	<46EA8FB6.4040405@codebykevin.com>
Message-ID: <loom.20070914T162253-409@post.gmane.org>

Kevin Walzer <kw <at> codebykevin.com> writes:

> 
> > 
> How did you install/build Python? On the Mac, you really aren't supposed 
> to start it from the terminal unless you are running it under X11 or are 
> using a non-framework build. If you built it the standard Mac way, or if 
> you use the binary installer from python.org, Idle is installed in 
> /Applications/MacPython 2.5. Look there, and you should be able to drag 
> the Idle icon to the dock.
> 

Hum Hum Hum...
That's what I did. It did not work. Now yes. ???!!!!!
I should have dreamt. I don't understand....

Thank you Kevin for your help
Dominique






From jstroud at mbi.ucla.edu  Sat Sep 15 15:48:37 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sat, 15 Sep 2007 19:48:37 GMT
Subject: Python statements not forcing whitespace is messy?
In-Reply-To: <1189884110.006272.240840@50g2000hsm.googlegroups.com>
References: <1189884110.006272.240840@50g2000hsm.googlegroups.com>
Message-ID: <pGWGi.7372$JD.130@newssvr21.news.prodigy.net>

buffi wrote:
> Am I the only one that thinks that python statements should force
> whitespace before and after them?
> 
> Right now this is not enforced and for an example these statements are
> valid
> 
> print"hello"
> "foo"if"bar"else"foobar"
> for(x,y)in[(1,2),(3,4)]:print(x,y)
> [(y)for(x,y)in[("foo",2),("bar",4)]if"foo"in(x)]
> 
> ...and so on.
> 
> I know that writing code like this really shouldn't be done but
> wouldn't it be a good idea to enforce the use of whitespace around
> statements?
> 
> (I wrote a short blog post about this here http://blog.buffis.com/?p=55
> but thought I would post here as well to see what other developers
> think)
> - Bj?rn Kemp?n
> 

You may have a point--but on the other hand, this may be purposefully 
allowed help to recruit perl programmers.

James


From byte8bits at gmail.com  Wed Sep 26 17:50:16 2007
From: byte8bits at gmail.com (byte8bits at gmail.com)
Date: Wed, 26 Sep 2007 21:50:16 -0000
Subject: Script to extract text from PDF files
In-Reply-To: <1190839750.537205.193110@d55g2000hsg.googlegroups.com>
References: <fdbh95$smc$1@solaris.cc.vt.edu>
	<1190746968.162359.39890@r29g2000hsg.googlegroups.com>
	<1190747931.415834.75670@n39g2000hsh.googlegroups.com>
	<1190839750.537205.193110@d55g2000hsg.googlegroups.com>
Message-ID: <1190843416.313377.13700@w3g2000hsg.googlegroups.com>

On Sep 26, 4:49 pm, Svenn Are Bjerkem <svenn.bjer... at googlemail.com>
wrote:

> I have downloaded this package and installed it and found that the
> text-extraction is more or less useless. Looking into the code and
> comparing with the PDF spec show a very early implementation of text
> extraction. Luckily it is possible to overwrite the textextraction
> method in the base class without having to fiddle with the original
> code. I tried to contact the developer to offer some help on
> implementing text extraction, but he didn't answer my emails.
> --
> Svenn

Well, feel free to send any ideas or help to me! It seems simple... Do
a binary read. Find 'stream' and 'endstream' sections.
zlib.decompress() all the streams. Find BT and ET markers (Begin Text
& End Text) and finally locate the parens within those and string the
text together. This works great on 3 out of 10 PDF documents, but my
main issue seems to be the zlib compressed streams. Some of them don't
seem to be FlateDecodeable (although they claim to be) or the header
is somehow incorrect. But, once I get a good stream and decompress it,
things are OK from that point on. Seriously, if you have ideas, please
let me know. I'll be glad to share what I've got so far.

Not many people seem to be interested. I'll stop adding to this
thread... I don't want to beat a dead horse. Anyone interested in
helping, can contact me via emial.

Thanks,

Brad



From carsten at uniqsys.com  Thu Sep 27 13:14:13 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 27 Sep 2007 13:14:13 -0400
Subject: True of False
In-Reply-To: <5m254hFatlbuU2@mid.uni-berlin.de>
References: <1190910814.594559.30880@n39g2000hsh.googlegroups.com>
	<5m254hFatlbuU2@mid.uni-berlin.de>
Message-ID: <1190913253.3391.6.camel@dot.uniqsys.com>

On Thu, 2007-09-27 at 16:47 +0000, Marc 'BlackJack' Rintsch wrote:
> On Thu, 27 Sep 2007 09:33:34 -0700, koutoo wrote:
> 
> > I tried writing a true and false If statement and didn't get
> > anything?  I read some previous posts, but I must be missing
> > something.  I just tried something easy:
> > 
> > a = ["a", "b", "c", "d", "e", "f"]
> > 
> > if "c" in a == True:
> >      Print "Yes"
> > 
> > When I run this, it runs, but nothing prints.  What am I doing wrong?
> 
> Wow that's odd:
> 
> In [265]: a = list('abcdef')
> 
> In [266]: a
> Out[266]: ['a', 'b', 'c', 'd', 'e', 'f']
> 
> In [267]: 'c' in a
> Out[267]: True
> 
> In [268]: 'c' in a == True
> Out[268]: False
> 
> In [269]: ('c' in a) == True
> Out[269]: True
> 
> In [270]: 'c' in (a == True)
> ---------------------------------------------------------------------------
> <type 'exceptions.TypeError'>             Traceback (most recent call last)
> 
> /home/bj/<ipython console> in <module>()
> 
> <type 'exceptions.TypeError'>: argument of type 'bool' is not iterable
> 
> 
> What's going on there?

What's going on here is that both 'in' and '==' are comparison
operations, and Python allows you to chain comparisons. Just like "a < x
< b" is evaluated as "a < x and x < b", "'c' in a == True" is evaluated
as "'c' in a and a == True". Obviously, since a==True is false, the
chained comparison is False.

-- 
Carsten Haese
http://informixdb.sourceforge.net




From exhuma at gmail.com  Mon Sep 10 07:58:30 2007
From: exhuma at gmail.com (exhuma.twn)
Date: Mon, 10 Sep 2007 04:58:30 -0700
Subject: easy_install only stable packages
Message-ID: <1189425510.836884.40140@y42g2000hsy.googlegroups.com>

easy_install is great. But it always automatically installs the
*latest* version. Even if that is beta,alpha (or however else the
developers call it). Is there no switch or possibility to disable this
feature? So that it installs the latest *stable* version?

I know that you can specify a specific version of a package with (for
example)

easy_install -U "SQLAlchemy==0.3.10"

This is undocumented on the web-page by the way ;)
But having to specify the version number for each package is quite
cumbersome.



From __peter__ at web.de  Tue Sep 11 13:34:57 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 11 Sep 2007 19:34:57 +0200
Subject: unexpected behavior: did i create a pointer?
References: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>
	<46e11dfe$0$4517$9b4e6d93@newsspool3.arcor-online.net>
	<pan.2007.09.07.10.40.46@REMOVE.THIS.cybersource.com.au>
	<fbrdsm$5f3$01$1@news.t-online.com>
	<13e2jdobu2kqkf1@corp.supernews.com>
	<fbtl7i$um3$02$2@news.t-online.com>
	<13e4rno5qal6h4b@corp.supernews.com>
Message-ID: <fc6jk1$t82$02$2@news.t-online.com>

Am Sat, 08 Sep 2007 09:44:24 +0000 schrieb Steven D'Aprano:

> Ways that Python objects are not like C pointers:
> 
> (1) You don't have to manage memory yourself.
> 
> (2) You don't have typecasts. You can't change the type of the object you 
> point to.
> 
> (3) Python makes no promises about the memory location of objects.
> 
> (4) No pointer arithmetic.
> 
> (5) No pointers to pointers, and for old-school Mac programmers, no 
> handles.
> 
> (6) No dangling pointers. Ever.
> 
> (7) There's no null pointer. None is an object, just like everything else.
> 
> (8) You can't crash your computer by writing the wrong thing to the wrong 
> pointer. You're unlikely even to crash your Python session.
> 
> 
> 
> Ways that Python objects are like pointers:
> 
> (1) ... um... 
> 
> Oh yeah, if you bind the _same_ object to two different names, _and_ the 
> object is mutable (but not if it is immutable), mutating the object via 
> one name will have the same effect on the object -- the same object, 
> naturally -- bound to the other name.

Had you put it that way in the first place I would have stayed in in my
hole ;)

Peter


From steve at holdenweb.com  Tue Sep 18 09:30:39 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 18 Sep 2007 09:30:39 -0400
Subject: Coming from Perl
In-Reply-To: <LFHHi.2774$tx1.1003@read1.cgocable.net>
References: <Cv%Fi.198$372.59@read2.cgocable.net>	<1189644803.816375.269950@y42g2000hsy.googlegroups.com>	<b46Gi.221$372.100@read2.cgocable.net>	<87y7fa52ru.fsf@benfinney.id.au>	<jWaGi.224$372.55@read2.cgocable.net>	<mailman.485.1189691416.2658.python-list@python.org>	<d9cGi.356$372.131@read2.cgocable.net>	<mailman.489.1189695918.2658.python-list@python.org>	<iPcGi.357$372.115@read2.cgocable.net>	<mailman.490.1189698752.2658.python-list@python.org>	<KgdGi.2174$tx1.172@read1.cgocable.net>	<A7KGi.8106$z_5.484@nlpi069.nbdc.sbc.com>	<oPRGi.2430$tx1.886@read1.cgocable.net>	<PGoHi.3595$3Y1.2483@newssvr17.news.prodigy.net>
	<LFHHi.2774$tx1.1003@read1.cgocable.net>
Message-ID: <fcojts$l9$1@sea.gmane.org>

Amer Neely wrote:
> Bryan Olson wrote:
>> Amer Neely wrote:
>>> I don't have shell access but I can run 'which python' from a Perl 
>>> script, and I will try the different shebang line you suggested.
>> And after trying it, Amer Neely reported:
>>
>>> I tried `which python` and `whereis python` and got 0 back as a 
>>> result. So it seems Python is not installed at all.
>> Probably right, but just to be thorough...  Since you do not
>> have shell access, I'm guessing you are running these within
>> a Perl cgi script, and getting the results via a browser. Is
>> that right?
> 
> Yes.
>> Can you backtick other commands? What do you get if you run
>> `which perl` the same way? How about `whoami`, `whereis sh`,
>> and `which nosuchthingas5748614`? Can you list /, /bin and
>> /usr/bin?
> 
> I just looked at my code and tried something else:
> @SysCmd="which python";
> system(@SysCmd);
> 
> and it came back
> /usr/local/bin/python
> 
>> How did you learn that this system could run your Perl
>> scripts? Can that source give us anything to go on here?
>> If Python is not installed, do you have some avenue for
>> requesting it?
>>
>> We're down to long shots. Still, hosts that support Perl
>> but will not support Python are getting to be the rare.
>>
>>
> 
> I've asked my host to put in a request for it.
> 
> So it seems python IS installed, but not where I thought it was.
> 
> I just tried my script with the new path, but still got a 500 server 
> error. Can I trap errors to a file locally?
> 
You could try putting an ErrorLog directive in your local .htaccess file.

   http://httpd.apache.org/docs/1.3/logs.html#errorlog

regards
  Steve

-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From rdm at rcblue.com  Tue Sep 11 18:31:07 2007
From: rdm at rcblue.com (Dick Moores)
Date: Tue, 11 Sep 2007 15:31:07 -0700
Subject: Speed of Python
In-Reply-To: <BAY122-F26364D8EC97387DA6FC814B4C50@phx.gbl>
References: <BAY122-F26364D8EC97387DA6FC814B4C50@phx.gbl>
Message-ID: <20070911223113.C2F091E4011@bag.python.org>

At 09:42 AM 9/7/2007, wang frank wrote:
>Are there any way to speed it up?

How about psyco?

Dick Moores
XP, Python 2.5.1, editor is Ulipad




From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Sep 24 05:43:59 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 24 Sep 2007 11:43:59 +0200
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <1190606861.982113.25240@d55g2000hsg.googlegroups.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<mailman.900.1190414696.2658.python-list@python.org>
	<1190415741.380795.259050@y42g2000hsy.googlegroups.com>
	<mailman.904.1190418441.2658.python-list@python.org>
	<1190419720.811685.145880@r29g2000hsg.googlegroups.com>
	<46f6eb3d$0$32060$426a34cc@news.free.fr>
	<1190606861.982113.25240@d55g2000hsg.googlegroups.com>
Message-ID: <46f786cc$0$8901$426a74cc@news.free.fr>

Cristian a ?crit :
> On Sep 21, 5:21 pm, Bruno Desthuilliers
> <bdesth.quelquech... at free.quelquepart.fr> wrote:
> 
>> Ok, then what about classes ? They also are objects-like-any-other,
>> after all. So should we have this syntax too ?
>>
>> MyClass = class(ParentClass):
>>    __init__ = function (self, name):
>>      self.name = name
>>
>> ?-)
> 
> For consistency I would suggest this, but Python already does this!
> 
> Foo = type('Foo', (object, ), {'bar': lambda self, bar: bar})
> 
> I've created a new class and then binded it to name afterwards. If you
> can import modules without special syntax and you can create classes
> without special syntax, why should functions be treated any
> differently?
> 

You already can create functions without using the def statement:

Help on class function in module __builtin__:

class function(object)
  |  function(code, globals[, name[, argdefs[, closure]]])
  |
  |  Create a function object from a code object and a dictionary.
  |  The optional name string overrides the name from the code object.
  |  The optional argdefs tuple specifies the default argument values.
  |  The optional closure tuple supplies the bindings for free variables.
  |


HTH


From bj_666 at gmx.net  Sat Sep  8 13:25:39 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 8 Sep 2007 17:25:39 GMT
Subject: /dev/null as a file-like object, or logging to nothing
References: <87k5r1jdzq.fsf@wilson.homeunix.com>
Message-ID: <5kg48jF33dv5U3@mid.uni-berlin.de>

On Sat, 08 Sep 2007 18:52:57 +0200, Torsten Bronger wrote:

> Is there a portable and simply way to direct file-like IO to simply
> nothing?  I try to implement some sort of NullLogging by saying

`os.devnull`?

Ciao,
	Marc 'BlackJack' Rintsch


From steve at holdenweb.com  Sat Sep  1 02:32:29 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 01 Sep 2007 02:32:29 -0400
Subject: list index()
In-Reply-To: <13dhvs3p5drsd99@corp.supernews.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>	<1188497498.3468.60.camel@dot.uniqsys.com>	<mailman.188.1188546300.28954.python-list@python.org>	<0v2dnaYWyv4HWkrbnZ2dnUVZ_oTinZ2d@speakeasy.net>	<1188551958.728836.137370@x35g2000prf.googlegroups.com>	<fOadnfwlCJbQfErbnZ2dnUVZ_jCdnZ2d@speakeasy.net>	<6ftgd35rd1g4mddqg2f44d7svd4r85ev17@4ax.com>
	<13dhvs3p5drsd99@corp.supernews.com>
Message-ID: <fbb121$vav$1@sea.gmane.org>

Dennis Lee Bieber wrote:
> On Fri, 31 Aug 2007 21:15:10 +0100, DaveM <asma61 at dsl.pipex.com>
> declaimed the following in comp.lang.python:
> 
> 
>> No - but I would pronounce "lever" and "fever" the same way, if that helps.
>>
> 	<shudder> To me, those are different... I suppose you also add an
> extra "i" to aluminum <G>

No, he just spells it with two i's like sensible people do. Who would 
ever want *three* I's in "aluminium" (which, by the way, you misspelled ;-)?

Such things are matters of practical significance to me, since I have 
adopted a policy of using English spelling when in the UK and US 
spelling when elsewhere. Since I am now pretty much full-time in the US, 
I am finally having to come to terms with its crazy spelling.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From tjreedy at udel.edu  Thu Sep 13 17:16:14 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 13 Sep 2007 17:16:14 -0400
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com><46e7974d$0$31726$426a74cc@news.free.fr><fc8fc9$4qa$1@news2.carnet.hr>
	<5kq1hgF4r90oU1@mid.individual.net><1189618530.872819.136450@57g2000hsv.googlegroups.com><1189619033.968437.286580@g4g2000hsf.googlegroups.com><5kr8vlF53m8gU3@mid.individual.net><1189643616.826715.58150@d55g2000hsg.googlegroups.com><5ksoaoF5am8cU1@mid.individual.net>
	<1189701793.466307.93210@g4g2000hsf.googlegroups.com>
Message-ID: <fcc9aq$jlk$1@sea.gmane.org>


"TheFlyingDutchman" <zzbbaadd at aol.com> wrote in message 
news:1189701793.466307.93210 at g4g2000hsf.googlegroups.com...
| Here's a FAQ item where they refer to it as I think Python should have
| done it - a special predefined variable:
|
| http://www.faqs.org/docs/javap/c5/s5.html
|
| "Java provides a special, predefined variable named "this" that you
| can use for such purposes. The variable, this, is used in the source
| code of an instance method to refer to the object that contains the
| method. This intent of the name, this, is to refer to "this object,"
| the one right here that this very method is in. If x is an instance
| variable in the same object, then this.x can be used as a full name
| for that variable. If otherMethod() is an instance method in the same
| object, then this.otherMethod() could be used to call that method.
| Whenever the computer executes an instance method, it automatically
| sets the variable, this, to refer to the object that contains the
| method."

In Python, methods are (functions) contained in (are attributes of) 
classes.  Hence, by the above, 'this' or 'self' would be set to the class 
and not the instance.  So the above would require some rewording for 
Python.

 





From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Sep 19 03:59:52 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 19 Sep 2007 09:59:52 +0200
Subject: Pseudo-Private Class Attributes
In-Reply-To: <mailman.743.1190155458.2658.python-list@python.org>
References: <mailman.743.1190155458.2658.python-list@python.org>
Message-ID: <46f0d6ec$0$8912$426a74cc@news.free.fr>

Ricardo Ar?oz a ?crit :
> That is self.__attributes
> 
> Been reading about the reasons to introduce them and am a little
> concerned. As far as I understand it if you have a class that inherits
> from two other classes which have both the same name for an attribute
> then you will have a name clash because all instance attributes "wind up
> in the single instance object at the bottom of the class tree".
> 
> Now I guess this means that in any real OOP project you'd better use
> __attr for all your attributes, because classes are usually meant to be
> subclassed and you can never know when you'll be subclassing from two
> classes with attributes with the same name, and I guess you can't take
> the risk of this happening because when it happens it will be hell to
> find out what's going on.
> 
> Is this right?

Wild guess : you're coming from Java or C++ ?-)

I don't know for sure what you mean by "real OOP project", but any 
non-trivial Python project surely qualifies IMHO, and it seems that so 
far no one had too much problem with this, so you're perhaps needlessly 
worrying.

Note that given Python's type system, inheritence is mostly about 
implementation - you don't need it for polymorphic dispatch. This 
results in class hierarchies being way much flatter in Python than in 
languages with declarative static typing - IOW, Python's classes are not 
necessarily "meant to be subclassed".

Also, while Python does support multiple inheritance, it's rarely used 
in practice (except perhaps in Zope 2, which is that pythonic). Python 
has great support for delegation, so composition/delegation is often 
used where MI would have been used in C++.

FWIW, __private names are of very rare use in Python. As far as I'm 
concerned, I must have use this feature a couple of times at most, in 
base classes or metaclasses of a small framework, because these couple 
attributes where really vital to the sytem and should by no mean be 
overloaded.

My 2 cents.



From luojiang2 at tom.com  Wed Sep  5 21:30:52 2007
From: luojiang2 at tom.com (Ginger)
Date: Thu, 6 Sep 2007 09:30:52 +0800
Subject: Text processing and file creation
References: <1189008809.718361.45790@g4g2000hsf.googlegroups.com>
	<2dc0c81b0709051003n6b81493ah373ce626e172309e@mail.gmail.com>
Message-ID: <008401c7f025$90623580$4de1a8c0@amd.com>

file reading latency is mainly caused by large reading frequency, so reduction of the frequency of file reading may be way to solved your problem.
u may specify an read bytes count for python file object's read() method, some large value(like 65536) can be specified due to ur memory usage, and u can parse lines from read buffer freely.

have fun!

----- Original Message ----- 
From: "Shawn Milochik" <Shawn at Milochik.com>
To: <python-list at python.org>
Sent: Thursday, September 06, 2007 1:03 AM
Subject: Re: Text processing and file creation


> On 9/5/07, malibuster at gmail.com <malibuster at gmail.com> wrote:
>> I have a text source file of about 20.000 lines.
>> >From this file, I like to write the first 5 lines to a new file. Close
>> that file, grab the next 5 lines write these to a new file... grabbing
>> 5 lines and creating new files until processing of all 20.000 lines is
>> done.
>> Is there an efficient way to do this in Python?
>> In advance, thanks for your help.
>>
> 
> 
> I have written a working test of this. Here's the basic setup:
> 
> 
> 
> 
> open the input file
> 
> function newFileName:
>    generate a filename (starting with 00001.tmp).
>    If filename exists, increment and test again (0002.tmp and so on).
>    return fileName
> 
> read a line until input file is empty:
> 
>    test to see whether I have written five lines. If so, get a new
> file name, close file, and open new file
> 
>    write line to file
> 
> close output file final time
> 
> 
> Once you get some code running, feel free to post it and we'll help.
> 
>

From sjmachin at lexicon.net  Sat Sep 15 19:17:57 2007
From: sjmachin at lexicon.net (John Machin)
Date: Sun, 16 Sep 2007 09:17:57 +1000
Subject: Python statements not forcing whitespace is messy?
In-Reply-To: <fchku3$n6e$1@daisy.noc.ucla.edu>
References: <1189884110.006272.240840@50g2000hsm.googlegroups.com>	<mailman.589.1189887114.2658.python-list@python.org>	<1189890755.870694.29790@r29g2000hsg.googlegroups.com>
	<mailman.594.1189893054.2658.python-list@python.org>
	<fchku3$n6e$1@daisy.noc.ucla.edu>
Message-ID: <46ec6826$1@news.eftel.com.au>

On 16/09/2007 8:11 AM, James Stroud wrote:
> Steve Holden wrote:
>> I don't know why you have a bug up your ass about it, as the
>> Americans say.
> 
> I think most Americans say "wild hare up your ass".

The essence of Steve's point appears to be that the OP has ridden into 
town to preach a misguided crusade against the heretofore-unknown 
non-spacing heretics.  It also seems to be alleged that at some stage, 
the OP's donkey has been severely molested by some malevolent fauna; I 
am having difficulty understanding the connection between the two 
themes, and which is cause and which is effect. Enlightenment, please.



From daniel.j.larsson at gmail.com  Tue Sep  4 17:01:17 2007
From: daniel.j.larsson at gmail.com (Daniel Larsson)
Date: Tue, 4 Sep 2007 23:01:17 +0200
Subject: doctest and decorators
In-Reply-To: <200709042236.37712.python@cx.hu>
References: <2bfa72fa0709041329i14b5b547i2eb85250f7547da@mail.gmail.com>
	<200709042236.37712.python@cx.hu>
Message-ID: <2bfa72fa0709041401g63e5f6aem55bcabe9e00134b@mail.gmail.com>

On 9/4/07, Ferenczi Viktor <python at cx.hu> wrote:
>
> > I assume this is a FAQ, but I couldn't find much helpful information
> > googling. I'm having trouble with doctest skipping my functions, if I'm
> > using decorators (that are defined in a separate module). If I'm
> > understanding what is happening correctly, it's because doctest checks
> if
> > the function's func_global attribute is the same as the module's
> __dict__
> > attribute. The decorator in question returns a wrapping function,
> though,
> > so this check fails.
> > What are some solutions to this? I can define __test__, but it seems
> rather
> > cumbersome.
>
> Please take a look at the documentation of the functools standard module
> in
> the Python manual, especially the wraps decorator. It could probably help.
>


Hmm, not really.

# decorator.py
import functools

def simplelog(f):
    @functools.wraps
    def new_f(*args, **kwds):
        print "Wrapper calling func"
        return f(*args, **kwds)
    return new_f

# test.py
from decorator import simplelog

@simplelog
def test():
    """
    >>> test()
    'works!'
    """
    return "works!"

if __name__ == '__main__':
    import doctest
    doctest.testmod()

$ python test.py -v
1 items had no tests:
    __main__
0 tests in 1 items.
0 passed and 0 failed.
Test passed.
-------------- next part --------------
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From steve at holdenweb.com  Fri Sep 21 12:13:02 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 21 Sep 2007 12:13:02 -0400
Subject: calling extension's autoconf/make from distutils
In-Reply-To: <1190386224.536371.136640@q3g2000prf.googlegroups.com>
References: <1190349834.894931.128050@q3g2000prf.googlegroups.com>
	<1190386224.536371.136640@q3g2000prf.googlegroups.com>
Message-ID: <fd0qif$kvo$2@sea.gmane.org>

Gary Jefferson wrote:
> On Sep 20, 10:43 pm, Gary Jefferson <garyjefferson... at yahoo.com>
> wrote:
>> I've got a python extension that comes with its own standard autoconf/
>> automake system, and I can "python setup.py build" just fine with it
>> as long as I have previously done "./configure" in that directory.
>>
>> However, 'python setup.py bdist_rpm' can't hope to have done './
>> configure' first, as it untars and tries to build the extension there.
>>
>> Is there a hook for bdist_rpm (and friends) that will allow me to
>> insert a './configure' in the build process, sometime before it tries
>> to build the extension?
>>
>> Thanks,
>> Gary
> 
> 
> I ended up simply subclassing 'Extension' and having it os.system('./
> configure') before proceeding.
> 
> This isn't perfect, as it does the './configure' everytime, but it
> works.
> 
[Sorry: it's config.status you shoudl check for, not config-status].

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From Shawn at Milochik.com  Fri Sep 14 09:44:23 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Fri, 14 Sep 2007 09:44:23 -0400
Subject: [Tutor] Just bought Python in a Nutshell
In-Reply-To: <eb79828c0709132112o5a3e7137n5ae5cd55e3e0b839@mail.gmail.com>
References: <eb79828c0709132112o5a3e7137n5ae5cd55e3e0b839@mail.gmail.com>
Message-ID: <2dc0c81b0709140644w629acda6vee05d589a2e54043@mail.gmail.com>

My best advice:

Skim it -- just flip the pages, glancing at each one without really
reading it -- maybe just read the bold type. You'll find that very
rewarding when you run into a problem in your coding and remember that
you saw *something* which could be related. You will probably notice
some built-in functions that you will need and possibly would have
re-invented if you didn't know they were there.

I don't really find it to be a "reading" book -- it's more of a
reference book. Flip through it, then keep it within reach of your
keyboard.

Shawn


From steve at REMOVE-THIS-cybersource.com.au  Thu Sep 13 09:55:28 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Thu, 13 Sep 2007 13:55:28 -0000
Subject: newbie: self.member syntax seems /really/ annoying
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189666095.727426.135170@o80g2000hse.googlegroups.com>
	<1189685403.306218.13270@22g2000hsm.googlegroups.com>
Message-ID: <13eigagsuk74l55@corp.supernews.com>

On Thu, 13 Sep 2007 12:10:03 +0000, timothy.soehnlin at gmail.com wrote:

> Why not use '_' as the self variable.  It is minimal and achieves close
> to '.var', as '_.var' isn't that different.  I know its a little
> perl-esque, but its not a bad convention if you are aiming to up
> readability of your code.

I think the definitions of "up" or "readability" you are using are very 
different from mine. To me, to up something means to increase it, and 
readability means the ease of comprehension when reading something. You 
seem to be using the opposite definition for one or the other.


-- 
Steven.


From aahz at pythoncraft.com  Thu Sep 13 22:21:05 2007
From: aahz at pythoncraft.com (Aahz)
Date: 13 Sep 2007 19:21:05 -0700
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<87ir6f5mrq.fsf@benfinney.id.au> <1189651204.408268.57580@1
	<874phz5i9n.fsf@benfinney.id.au>
Message-ID: <fccr6h$t20$1@panix3.panix.com>

In article <874phz5i9n.fsf at benfinney.id.au>,
Ben Finney  <bignose+hates-spam at benfinney.id.au> wrote:
>
>Specifically an easier way of doing it provided by the language syntax
>(hence "syntactic sugar"). As in, "the form 'foo += 1' is syntactic
>sugar for 'foo = foo + 1'".

Except, of course, that it isn't, quite.  ;-)
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"Many customs in this life persist because they ease friction and promote
productivity as a result of universal agreement, and whether they are
precisely the optimal choices is much less important." --Henry Spencer
http://www.lysator.liu.se/c/ten-commandments.html


From alexandre.badez at gmail.com  Wed Sep  5 05:01:56 2007
From: alexandre.badez at gmail.com (Alexandre Badez)
Date: Wed, 05 Sep 2007 09:01:56 -0000
Subject: Multi Heritage with slots
Message-ID: <1188982916.071976.160170@g4g2000hsf.googlegroups.com>

Hye,

I'm developing a little app, and I want to make multi heritage.
My problem is that my both parent do have __slots__ define.

So I've got something like:

class foo(object):
    __slots__ = ['a', 'b']
    pass

class foo2(object):
    __slots__ = ['c', 'd']
    pass

class crash(foo, foo2):
    pass

If you write only that in a sample file or in python console (as I
did), python refuse to load the module and report something like:

Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: Error when calling the metaclass bases
    multiple bases have instance lay-out conflict

Do you know why it append? And how could I make this work?



From ldo at geek-central.gen.new_zealand  Fri Sep  7 01:40:19 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Fri, 07 Sep 2007 17:40:19 +1200
Subject: concise code (beginner)
References: <13dsvqrqivtf092@corp.supernews.com>
	<13dv4uqqb806ff0@corp.supernews.com>
Message-ID: <fbqo83$8fd$1@lust.ihug.co.nz>

In message <13dv4uqqb806ff0 at corp.supernews.com>, bambam wrote:

> The devices are in a list, and are removed by using pop(i). This
> messes up the loop iteration, so it is actually done by setting a
> flag on each device in the exception handler, with ANOTHER
> loop after each write/read/calculate sequence.

Why not just build a new list? E.g.

    newdevs = []
    for dev in devs :
        ...
        if not removing_dev :
            newdevs.append(dev)
        #end if
    #end for
    devs = newdevs


From martin at v.loewis.de  Fri Sep 28 18:26:42 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 29 Sep 2007 00:26:42 +0200
Subject: marshal bug?
In-Reply-To: <mailman.1211.1190964469.2658.python-list@python.org>
References: <1190961020.258850.215130@g4g2000hsf.googlegroups.com>	<18c1e6480709280011g1fcc4976v77dd0eec0e416752@mail.gmail.com>
	<mailman.1211.1190964469.2658.python-list@python.org>
Message-ID: <46FD7FA2.2020409@v.loewis.de>

> [1] http://coverage.livinglogic.de/Python/marshal.c.html. (Actually, I
> checked the downloaded bz2, but this is the only URL for marshal.c I
> could find)

A better URL is

http://svn.python.org/projects/python/trunk/Python/marshal.c

or

http://svn.python.org/view/python/trunk/Python/marshal.c

Regards,
Martin


From stefan.behnel-n05pAM at web.de  Sat Sep 15 12:42:42 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Sat, 15 Sep 2007 18:42:42 +0200
Subject: find and remove "\" character from string
In-Reply-To: <mailman.585.1189873880.2658.python-list@python.org>
References: <mailman.585.1189873880.2658.python-list@python.org>
Message-ID: <46EC0B82.40309@web.de>

Konstantinos Pachopoulos wrote:
> i have the following string s and the following code, which doesn't
> successfully remove the "\", but sucessfully removes the "\\".
> 
>>>> s="Sad\\asd\asd"
>>>> newS=""
>>>> for i in s:
> ...     if i!="\\":
> ...             newS=newS+i

I'm not quite sure what you're trying to achieve, but I'd use

    >>> r"\\a\\b\c".replace("\\\\", "")
    'ab\\c'

    >>> r"\\a\\b\c".replace("\\", "")
    'abc'

Note that "\\" in the source is unescaped to "\" in the string. Use r"\\" to
prevent that.

Stefan


From jura.grozni at gmail.com  Sat Sep 22 13:29:12 2007
From: jura.grozni at gmail.com (azrael)
Date: Sat, 22 Sep 2007 10:29:12 -0700
Subject: Video from image
Message-ID: <1190482152.556818.19300@k79g2000hse.googlegroups.com>

I'd like to ask you if you know a module that makes it possible to
create a number of images and than to use them as frames and finaly
export them to a video file



From ebgssth at gmail.com  Sat Sep 15 12:14:01 2007
From: ebgssth at gmail.com (js)
Date: Sun, 16 Sep 2007 01:14:01 +0900
Subject: RFC-3986 or 2396 implementation in Python?
Message-ID: <a23effaf0709150914p2ab06202i605372ff8487c977@mail.gmail.com>

Hi list.

Is there any module that is compatible with RFC-3986 or 2396, which is like
Perl's URI module(http://search.cpan.org/~gaas/URI-1.35/URI.pm)?

I like to normalize lots of URIs I've got in  my database to make them
all unique ones.

Thank you in advance.


From eduardo.padoan at gmail.com  Sat Sep 15 16:31:47 2007
From: eduardo.padoan at gmail.com (Eduardo O. Padoan)
Date: Sat, 15 Sep 2007 17:31:47 -0300
Subject: Python statements not forcing whitespace is messy?
In-Reply-To: <46EC3C6E.6050002@sdf.lonestar.org>
References: <1189884110.006272.240840@50g2000hsm.googlegroups.com>
	<46EC3C6E.6050002@sdf.lonestar.org>
Message-ID: <dea92f560709151331q6ace38adk423ceb19c77a5642@mail.gmail.com>

On 9/15/07, J. Cliff Dyer <jcd at sdf.lonestar.org> wrote:
> And I'd hate to have to remember all of the rules for what can go
> together and what can't, especially when it comes time to debug.  No.
> I don't think it should be forced, but maybe put it in PEP8 or PEP3008.

It is: see "Whitespace in Expressions and Statements" in PEP 8.


-- 
http://www.advogato.org/person/eopadoan/
Bookmarks: http://del.icio.us/edcrypt


From morphine at despammed.com  Sun Sep 30 06:33:55 2007
From: morphine at despammed.com (morphine)
Date: Sun, 30 Sep 2007 12:33:55 +0200
Subject: Can you please give me some advice?
References: <mailman.1300.1191147737.2658.python-list@python.org>
Message-ID: <46ff7b44$0$4798$4fafbaef@reader4.news.tin.it>

Byung-Hee HWANG wrote:

> Hi there,
> 
> What is different between Ruby and Python? I am wondering what language
> is really mine for work. Somebody tell me Ruby is clean or Python is
> really easy! Anyway I will really make decision today what I have to
> study from now on. 

What kind of advice do you expect on a NG called comp.lang.PYTHON ?

> What I make the decision is more difficult than to 
> know why I have to learn English. Yeah I do not like to learn English
> because it is just very painful..

Then stop learning it ;)

ciao
-- 
morphine



From jcd at sdf.lonestar.org  Fri Sep 14 09:43:27 2007
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Fri, 14 Sep 2007 09:43:27 -0400
Subject: recursion
In-Reply-To: <fcdrv9$7lr$1@ss408.t-com.hr>
References: <fcbfnj$lh4$1@ss408.t-com.hr>
	<slrnfeinvk.1cc.horpner@FIAD06.norwich.edu>
	<mailman.491.1189700115.2658.python-list@python.org>
	<slrnfeit3k.1lg.horpner@FIAD06.norwich.edu>
	<fcdrv9$7lr$1@ss408.t-com.hr>
Message-ID: <20070914134327.GA15615@sdf.lonestar.org>


On Fri, Sep 14, 2007 at 01:40:17PM +0200, Gigs_ wrote regarding Re: recursion:
> 
> what i mean is how python knows to add all thing at the end of recursion
> 
>  >>> def f(l):
>      if l == []:
>          return []
>      else:
>          return f(l[1:]) + l[:1]
> 

The following script does exactly the same thing, except it creates print 
statements to help you figure out what's going on, and it binds f(L[1:]) to 
a variable so you can use it again.

def f(L):  # l capitalized to accentuate difference between l and 1.
    print "L =", L
    print "L[1:] =", L[1:]
    print "L[:1] =", L[:1]
    if L == []:
        print "Return: ", []
        return []
    else:
        next = f(L[1:])
        print "Return: ", next, "+", L[:1], "=", next + L[:1]
        return next + L[:1]

if __name__=='__main__':
    print f(['A', 'B', 'C', 'D'])

Try it out.  See what happens.

Cheers,
Cliff


From aahz at pythoncraft.com  Wed Sep  5 08:44:44 2007
From: aahz at pythoncraft.com (Aahz)
Date: 5 Sep 2007 05:44:44 -0700
Subject: creating really big lists
References: <1188985838.661821.41530@k79g2000hse.googlegroups.com>
Message-ID: <fbm8bs$737$1@panix3.panix.com>

In article <1188985838.661821.41530 at k79g2000hse.googlegroups.com>,
Dr Mephesto  <dnhkng at googlemail.com> wrote:
>
>I would like to create a pretty big list of lists; a list 3,000,000
>long, each entry containing 5 empty lists. My application will append
>data each of the 5 sublists, so they will be of varying lengths (so no
>arrays!).

Why do you want to pre-create this?  Why not just create the big list and
sublists as you append data to the sublists?
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"Many customs in this life persist because they ease friction and promote
productivity as a result of universal agreement, and whether they are
precisely the optimal choices is much less important." --Henry Spencer
http://www.lysator.liu.se/c/ten-commandments.html


From gagsl-py2 at yahoo.com.ar  Mon Sep 24 04:18:10 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 24 Sep 2007 05:18:10 -0300
Subject: annoying stdin/stdout + pipes problem
References: <1190554821.677666.93530@w3g2000hsg.googlegroups.com>
	<46f69324$0$90263$14726298@news.sunsite.dk>
	<1190617447.995633.48480@n39g2000hsh.googlegroups.com>
Message-ID: <op.ty5f0kecx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 24 Sep 2007 04:04:07 -0300, per9000 <per9000 at gmail.com> escribi?:

> On 23 Sep, 18:24, Damjan <gdam... at gmail.com> wrote:
>> > I want to create a program that reads input from stdio that can prompt
>> > a user for input while doing so without getting into problems.
>> ...
>>
>> The trick (which works on Linux for sure) is to open /dev/tty and ask
>> question/get input on/from it.
>
> it worked just fine on my Gnu/Linux machine, but I'd really like it to
> be independent of OS. Any one else got some idea - or a windows
> version of the same?

On Windows it's almost the same, using "conin$" as the filename for  
console input, and "conout$" as the filename for console output.

-- 
Gabriel Genellina



From rschroev_nospam_ml at fastmail.fm  Tue Sep 25 06:03:04 2007
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Tue, 25 Sep 2007 10:03:04 GMT
Subject: Newbie completely confused
In-Reply-To: <mailman.997.1190649060.2658.python-list@python.org>
References: <mailman.876.1190392492.2658.python-list@python.org>	<IE4Ji.117838$pR1.5801002@phobos.telenet-ops.be>
	<mailman.997.1190649060.2658.python-list@python.org>
Message-ID: <s15Ki.122826$Mk7.5894272@phobos.telenet-ops.be>

Jeroen Hegeman schreef:
> Thanks for the comments,
> 
>> (First, I had to add timing code to ReadClasses: the code you posted
>> doesn't include them, and only shows timings for ReadLines.)
>>
>> Your program uses quite a bit of memory. I guess it gets harder and
>> harder to allocate the required amounts of memory.
> 
> Well, I guess there could be something in that, but why is there a  
> significant increase after the first time? And after that, single- 
> trip time pretty much flattens out. No more obvious increases.

Sorry, I have no idea.

>> If I change this line in ReadClasses:
>>
>>          built_classes[len(built_classes)] = HugeClass(long_line)
>>
>> to
>>
>> 	dummy = HugeClass(long_line)
>>
>> then both times the files are read and your data structures are built,
>> but after each run the data structure is freed. The result is that  
>> both
>> runs are equally fast.
> 
> Isnt't the 'del LINES' supposed to achieve the same thing? And  
> really, reading 30MB files should not be such a problem, right? (I'm  
> also running with 1GB of RAM.)

'del LINES' deletes the lines that are read from the file, but not all 
of your data structures that you created out of them.
Now, indeed, reading 30 MB files should not be a problem. And I am 
confident that just reading the data is not a problem. To make sure I 
created a simple test:

import time

input_files = ["./test_file0.txt", "./test_file1.txt"]

total_start = time.time()
data = {}
for input_fn in input_files:
     file_start = time.time()
     f = file(input_fn, 'r')
     data[input_fn] = f.read()
     f.close()
     file_done = time.time()
     print '%s: %f to read %d bytes' % (input_fn, file_done - 
file_start, len(data))
total_done = time.time()
print 'all done in %f' % (total_done - total_start)


When I run that with test_file0.txt and test_file1.txt as you described 
(each 30 MB), I get this output:

./test_file0.txt: 0.260000 to read 1 bytes
./test_file1.txt: 0.251000 to read 2 bytes
all done in 0.521000

Therefore I think the problem is not in reading the data, but in 
processing it and creating the data structures.

>> You read the files, but don't use the contents; instead you use
>> long_line over and over. I suppose you do that because this is a test,
>> not your actual code?
> 
> Yeah ;-) (Do I notice a lack of trust in the responses I get? Should  
> I not mention 'newbie'?)

I didn't mean to attack you; it's just that the program reads 30 MB of 
data, twice, but doesn't do anything with it. It only uses the data that 
was stored in long_lines, and which never is replaced. That is very 
strange for real code, but as a test it can have it's uses. That's why I 
asked.

> Let's get a couple of things out of the way:
> - I do know about meaningful variable names and case-conventions,  
> but ... First of all I also have to live with inherited code (I don't  
> like people shouting in their code either), and secondly (all the  
> itemx) most of these members normally _have_ descriptive names but  
> I'm not supposed to copy-paste the original code to any newsgroups.

Ok.

> - I also know that a plain 'return' in python does not do anything  
> but I happen to like them. Same holds for the sys.exit() call.

Ok.

> - The __init__ methods normally actually do something: they  
> initialise some member variables to meaningful values (by calling the  
> clear() method, actually).
> - The __clear__ method normally brings objects back into a well- 
> defined 'empty' state.
> - The __del__ methods are actually needed in this case (well, in the  
> _real_ code anyway). The python code loads a module written in C++  
> and some of the member variables actually point to C++ objects  
> created dynamically, so one actually has to call their destructors  
> before unbinding the python var.

That sounds a bit weird to me; I would think such explicit memory 
management belongs in the C++ code instead of in the Python code, but I 
must admit that I know next to nothing about extending Python so I 
assume you are right.

> All right, thanks for the tips. I guess the issue itself is still  
> open, though.

I'm afraid so. Sorry I can't help.

One thing that helped me in the past to speed up input is using memory 
mapped I/O instead of stream I/O. But that was in C++ on Windows; I 
don't know if the same applies to Python on Linux.

-- 
The saddest aspect of life right now is that science gathers knowledge
faster than society gathers wisdom.
   -- Isaac Asimov

Roel Schroeven


From horpner at yahoo.com  Fri Sep  7 13:22:03 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Fri, 07 Sep 2007 17:22:03 GMT
Subject: library to launch program in linux
References: <1189103678.484278.321650@r34g2000hsd.googlegroups.com>
	<13e0itfgm0ida1c@corp.supernews.com>
	<mailman.179.1189107271.2658.python-list@python.org>
	<fbr173$dha$3@lust.ihug.co.nz>
Message-ID: <slrnfe2h99.1rc.horpner@FIAD06.norwich.edu>

On 2007-09-07, Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> wrote:
> In message <mailman.179.1189107271.2658.python-list at python.org>, Laszlo Nagy
> wrote:
>
>> Grant Edwards wrote:
>>
>>> On 2007-09-06, idzwan.nizam at gmail.com <idzwan.nizam at gmail.com> wrote:
>>>   
>>>> I'm a new user. What library should I use so that I can launch
>>>> program in linux using python?
>>>>     
>>>
>>> subprocess
>>>   
>> Hmm, there are some others...
>
> subprocess subsumes them all.

And someday soon, subprocess will RULE THE WORLD! BWA-HAHAHAHAH!

-- 
Neil Cerutti


From evan at yelp.com  Fri Sep  7 02:49:14 2007
From: evan at yelp.com (Evan Klitzke)
Date: Thu, 06 Sep 2007 23:49:14 -0700
Subject: Why 'class spam(object)' instead of class spam(Object)' ?
In-Reply-To: <f1aa6d810709062330s3589cdb3s80c0d65e4d49b098@mail.gmail.com>
References: <f1aa6d810709062330s3589cdb3s80c0d65e4d49b098@mail.gmail.com>
Message-ID: <1189147754.6277.7.camel@thinkpad>

On Fri, 2007-09-07 at 01:30 -0500, Sergio Correia wrote:
> Hi, I'm kinda new to Python (that means, I'm a total noob here), but
> have one doubt which is more about consistency that anything else.
> 
> Why if PEP 8 says that "Almost without exception, class names use the
> CapWords convention", does the most basic class, object, is lowercase?

The convention is that classes written in C use lower case, while
classes written in Python use capital letters. That's why list, tuple,
set, dict, and so forth are all classes with lower case letters.

> I found a thread about this:
> http://mail.python.org/pipermail/python-list/2007-April/437365.html
> where its stated that -object- is actually a type, not a class; but
> the idea still doesn't convince me.
> 
> If i create a class Spam using -object- as a parent class, I would
> expect -object- to be a class, not a type as in type(object) (what is
> the difference between both btw?). But, on the other hand, if I do
> help(object), I get:
> 
> >>> help(object)
> Help on class object in module __builtin__:
> 
> class object
>  |  The most base type
> 
> So is this a class? No...
> 
> >>> object
> <type 'object'>
> 
> My doubts get compounded when strange stuff starts to happen:
> 
> >>> class Eggs(object):
> 	def __init__(self):
> 		self.x = 1
> >>> type(Eggs)
> <type 'type'>
> 
> Type 'type'? What is that supposed to mean?

I'm not 100% sure how new style classes work, but my understanding is
that while normally we refer to objects as instances of classes, classes
are really instances of type objects! Types are treated specially (IIRC,
types are instantiated exactly once, on the stack) in Python, so you
shouldn't worry about them, other than to know they are the "class" that
classes belong to.

-- 
Evan Klitzke <evan at yelp.com>



From stefan.behnel-n05pAM at web.de  Wed Sep 19 12:24:38 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Wed, 19 Sep 2007 18:24:38 +0200
Subject: Extracting xml from html
In-Reply-To: <1190210892.719313.51680@22g2000hsm.googlegroups.com>
References: <1190061079.025479.129070@w3g2000hsg.googlegroups.com>
	<46EF769E.4080103@web.de>
	<1190144020.294613.167800@57g2000hsv.googlegroups.com>
	<46F0DA24.5030000@web.de>
	<1190210892.719313.51680@22g2000hsm.googlegroups.com>
Message-ID: <46F14D46.3040407@web.de>

kyosohma at gmail.com wrote:
>>    row = tree.find("//Row")
>>    print row.findtext("primaryowner")
>>    print row.findtext("customeraddress")
> 
> I tried this your way and Laurent's way and both give me this error:
> 
> AttributeError: 'NoneType' object has no attribute 'findtext'

Well, error handling is up to you. If find() doesn't find what you are looking
for, it will return None. Note that tag names are case sensitive - or maybe
there are namespaces involved, cannot tell from the example you posted.

Stefan


From whamil1 at entergy.com  Fri Sep  7 09:12:09 2007
From: whamil1 at entergy.com (Hamilton, William )
Date: Fri, 7 Sep 2007 08:12:09 -0500
Subject: application version checking against database
In-Reply-To: <1189165916.268515.10360@d55g2000hsg.googlegroups.com>
Message-ID: <588D53831C701746A2DF46E365C018CE01D2CB32@LITEXETSP001.etrsouth.corp.entergy.com>

> From: imageguy
> 
> We are trying to implement a system that checks the version of the
> application against a version number stored in the database.  We don't
> want the app and the db don't become out of sync.
> 
> We have tried setting a __version__ variable in the top most module,
> however, it seems that this is not accessible for the modules that are
> subsequently imported.  There are a several locations in the app where
> we want to do the version check, but we would like to have one place
> to set the version number, namely the top level module.
> 
> We have thought of creating a Version class and passing it around, but
> aren't really keen on that idea.
> 
> Any suggestions/ideas would be helpful.
> 
> 
> NOTE: the app is developed in wxPython.
> 

You could add a Version module that contains the version number and any
functions related to the version checking, and import that into the
modules that do version checking.

--
-Bill Hamilton


From fd.calabrese at gmail.com  Sun Sep 16 06:21:59 2007
From: fd.calabrese at gmail.com (cesco)
Date: Sun, 16 Sep 2007 10:21:59 -0000
Subject: generate list of partially accumulated values
In-Reply-To: <1189937183.100462.175070@o80g2000hse.googlegroups.com>
References: <1189936564.932553.148800@50g2000hsm.googlegroups.com>
	<1189936979.276166.103080@w3g2000hsg.googlegroups.com>
	<1189937183.100462.175070@o80g2000hse.googlegroups.com>
Message-ID: <1189938119.469599.171960@w3g2000hsg.googlegroups.com>

> l = [1, 2, 3, 4]
> [sum(l[:x+1]) for x in xrange(len(l))]

Thanks,

actually my problem is a bit more complex (I thought I could get a
solution by posting a simplified version...)

The list is composed of objects:
l = [obj1, obj2, obj3, obj4]
and I need to call a method (say method1) on each object as follow:
l1 = [obj1.method1(obj2), obj2.method1(obj3), obj3.method1(obj4),
obj4]

Is there a clean way of doing this?

Thanks again
Francesco



From tigerb at yahoo.com  Wed Sep 12 17:23:37 2007
From: tigerb at yahoo.com (TonyB)
Date: Wed, 12 Sep 2007 14:23:37 -0700
Subject: struct is saving 4 bytes instead of 2
Message-ID: <1189632217.661924.25520@r34g2000hsd.googlegroups.com>

Using UBUNTU python 2.4.3 I'm using struct to save a variable to a
file.  My goal is to save it as a 2 byte signed integer.  Its being
saved using:

f.write(struct.pack('h',thevariable))

When I inspect the file with a hex editor it show that the variable is
being saved as 4 bytes.  How can I make it save the value as 2 bytes?

Tony



From wizzardx at gmail.com  Thu Sep 20 16:14:30 2007
From: wizzardx at gmail.com (David)
Date: Thu, 20 Sep 2007 22:14:30 +0200
Subject: Tapping into the access of an int instance
In-Reply-To: <96f089100709201021m25e2243ey5fb9fa48917c3bc0@mail.gmail.com>
References: <96f089100709201021m25e2243ey5fb9fa48917c3bc0@mail.gmail.com>
Message-ID: <18c1e6480709201314q3add229fu3d0022e7529b90c2@mail.gmail.com>

On 9/20/07, Tor Erik S?nvisen <torerik81 at gmail.com> wrote:
> Hi,
>
> Does anyone know how to interrupt the lookup of an integer value? I
> know I need to subclass int, since builtin types can't be altered
> directly...
>
> Below is how far I've come... What I want is to tap into the access of
> instance i's value 1...

You can cheat in your example by overriding the __str__ method. That
method (or __repr__) is what gets called from the interpreter to
display your variable.

You can also override the __int__ method. Then int(i) can return a
custom value.

You can also do something close to what you want with properties:

x = X() # Where X is a class with appropriate setter and getter methods
x.i = 5
print x.i # Outputs something besides 5

However, it sounds like you want the equivalent of a non-existant
__getvalue__ method that you could override to return a custom value
instead of the one you initialised the variable with. Like a kind of
"proxy to self" method. However, Python variables don't work that way
:-)


From carsten at uniqsys.com  Sat Sep 29 08:40:54 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Sat, 29 Sep 2007 08:40:54 -0400
Subject: Python 3.0 migration plans?
In-Reply-To: <SdkLi.3274$6p6.987@newssvr25.news.prodigy.net>
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>
	<%q0Li.725$ih1.539@nlpi068.nbdc.sbc.com>
	<1i555ag.9ez4uvf4583jN%aleax@mac.com>
	<ns9Li.1172$4V6.1092@newssvr14.news.prodigy.net>
	<1191010125.107578.67700@g4g2000hsf.googlegroups.com>
	<SdkLi.3274$6p6.987@newssvr25.news.prodigy.net>
Message-ID: <1191069654.3276.4.camel@localhost.localdomain>

On Sat, 2007-09-29 at 04:09 +0000, John Nagle wrote:
> [...]
> For example, MySQL AB supports a Perl binding to MySQL, but not a
> Python binding.

And what's your point, other than that apparently MySQL AB doesn't care
about Python?

-- 
Carsten Haese
http://informixdb.sourceforge.net




From __peter__ at web.de  Thu Sep 13 02:49:22 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 13 Sep 2007 08:49:22 +0200
Subject: File Parsing Question
References: <mailman.455.1189630858.2658.python-list@python.org>
	<1189634861.631219.143310@57g2000hsv.googlegroups.com>
	<mailman.456.1189636092.2658.python-list@python.org>
	<13ehmjf33b3d029@corp.supernews.com>
Message-ID: <fcamhi$821$00$1@news.t-online.com>

Dennis Lee Bieber wrote:

>  for line in inp:
> 
> will read one line at a time (I'm fairly sure the iterator doesn't
> attempt to buffer multiple lines behind the scenes)

You are wrong:

>>> open("tmp.txt", "w").writelines("%s\n" % (9*c) for c in "ABCDE")
>>> instream = open("tmp.txt")
>>> for line in instream:
...     print instream.tell(), line.strip()
... 
50 AAAAAAAAA
50 BBBBBBBBB
50 CCCCCCCCC
50 DDDDDDDDD
50 EEEEEEEEE
>>> 

Here's the workaround:

>>> instream = open("tmp.txt")
>>> for line in iter(instream.readline, ""):
...     print instream.tell(), line.strip()
... 
10 AAAAAAAAA
20 BBBBBBBBB
30 CCCCCCCCC
40 DDDDDDDDD
50 EEEEEEEEE
>>> 

Peter


From steve at holdenweb.com  Fri Sep  7 17:48:33 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 07 Sep 2007 14:48:33 -0700
Subject: How to convert None to null value
In-Reply-To: <1189192525.3367.97.camel@dot.uniqsys.com>
References: <eb3f41b30709070219h1b32aacj8f6daac23cd02807@mail.gmail.com>	<mailman.217.1189170478.2658.python-list@python.org>	<13e38g6poh2jre3@corp.supernews.com>
	<1189192525.3367.97.camel@dot.uniqsys.com>
Message-ID: <fbsgvi$saa$1@sea.gmane.org>

Carsten Haese wrote:
> On Fri, 2007-09-07 at 12:10 -0700, Dennis Lee Bieber wrote:
>> On Fri, 07 Sep 2007 09:07:49 -0400, Carsten Haese <carsten at uniqsys.com>
>> declaimed the following in comp.lang.python:
>>
>>
>>> doesn't have a parameter binding mechanism, you should throw it away and
>>> replace it with a DB-API complaint module.
>>>
>> 	I hadn't realized the DB-API defined a "complaint" module <G>
> 
> Yeah, I noticed the typo a minute too late. Dyslexics of the world,
> untie! ;-)
> 
Dyslexia rules, KO

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From steve at holdenweb.com  Thu Sep 27 11:34:12 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 27 Sep 2007 11:34:12 -0400
Subject: setuptools without unexpected downloads
In-Reply-To: <1190903184.578243.192110@n39g2000hsh.googlegroups.com>
References: <87ejgmklep.fsf@benfinney.id.au>	<1190802526.695391.326220@n39g2000hsh.googlegroups.com>	<5lurorFa92euU1@mid.uni-berlin.de>	<1190805012.275901.227570@57g2000hsv.googlegroups.com>	<5luv0iFaai82U1@mid.uni-berlin.de>	<1190808836.056298.232640@57g2000hsv.googlegroups.com>	<fddivk$f90$1@sea.gmane.org>	<mailman.1111.1190813942.2658.python-list@python.org>	<1190840682.716950.131830@r29g2000hsg.googlegroups.com>	<mailman.1140.1190847171.2658.python-list@python.org>
	<1190903184.578243.192110@n39g2000hsh.googlegroups.com>
Message-ID: <fdgihk$516$1@sea.gmane.org>

kyosohma at gmail.com wrote:
> On Sep 26, 5:52 pm, Steve Holden <st... at holdenweb.com> wrote:
>> kyoso... at gmail.com wrote:
>>> On Sep 26, 8:30 am, Steve Holden <st... at holdenweb.com> wrote:
>>>> Fredrik Lundh wrote:
>>>>> Paul Boddie wrote:
>>>>>> P.S. Of course, the package maintainer problem manifests itself most
>>>>>> prominently on Windows where you often see people asking for pre-built
>>>>>> packages or installers.
>>>>> for the record, I'd love to see a group of volunteers doing stuff like
>>>>> this for Windows.  there are plenty of volunteers that cover all major
>>>>> Linux/*BSD distributions (tons of thanks to everyone involved in this!),
>>>>> but as far as I can remember, nobody has ever volunteered to do the same
>>>>> for Windows.
>>>> I'd like to see something like this happen, too, and if a group of
>>>> volunteers emerges I'll do what I can through the PSF to provide
>>>> resources. Activities that benefit the whole community (or a large part
>>>> of it) are, IMHO, well worth supporting.
>>> What would it entail to do this? Using py2exe + some installer (like
>>> Inno Setup) to create an installer that basically copies/installs the
>>> files into the site-packages folder or wherever the user chooses? If
>>> that's all it is, I would think it would be fairly easy to create
>>> these. Maybe I'm over-simplifying it though.
>>> What are a some examples of packages that need this?
>> MySQLdb and psycopg are two obvious examples I have had to grub around
>> or produce my own installers for. There's generally some configuration
>> work to do for packages that have been produced without considering
>> Windows requirements, and ideally this will be fed back to the developers.
>>
>> I think you may be oversimplifying a little. Pure Python packages aren't
>> too problematic, it's mostly the extension modules. Unless a copy of
>> Visual Studio is available (and we *might* get some cooperation from
>> Microsoft there) that means resorting to MingW, which isn't an easy
>> environment to play with (in my occasional experience, anyway).
>>
>> There's going to be increasing demand for 64-bit implementations too.
>>
>> regards
>>   Steve
>> --
>> Steve Holden        +1 571 484 6266   +1 800 494 3119
>> Holden Web LLC/Ltd          http://www.holdenweb.com
>> Skype: holdenweb      http://del.icio.us/steve.holden
>>
>> Sorry, the dog ate my .sigline
> 
> Steve,
> 
> We have Visual Studio 2005 at work and my boss is a Python nut, so I
> could probably use it. I also have academic versions of VS 6 and 2003
> (maybe 2005 too...I forget, it might be 2004) at home as well...I
> think I can use those for open source development, although knowing
> Microsoft, there's probably something draconian hiding in the EULA
> somewhere.
> 
> If someone is willing to give me some guidance, I'll give it a try.
> 
Mike:

The existing Python Windows installation is, IIRC, produced with VS 
2003. Though much work has been done on making a VS2005 version, I do 
not believe it has yet been completed. But I don't believe there's 
anything horrendous in the EULA waiting to bite us in the ass.

I think I could probably get Microsoft to make low-cost software 
available for individuals who were helping the Python community out in 
this way (and if not then I might persuade the PSF to apply some funding 
if individuals were seen to be committed to the task).

At least as important as individual volunteers to do the packaging work 
(and feed back changes to non-Windows implementation teams) is the need 
for someone to coordinate all the work done on different packages. 
Without someone who has an overall grasp of what's going on such work 
might tend to founder. Are you interested in that side of things at all?

I'm happy to give you what guidance I can [off line would probably be 
best], but my version of Visual Studio hasn't been used in two months ...

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From jstroud at mbi.ucla.edu  Wed Sep 12 19:51:25 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 12 Sep 2007 16:51:25 -0700
Subject: compiling an extension for several versions of python
In-Reply-To: <ikYFi.7707$z_5.373@nlpi069.nbdc.sbc.com>
References: <ikYFi.7707$z_5.373@nlpi069.nbdc.sbc.com>
Message-ID: <fc9tlc$s7n$1@daisy.noc.ucla.edu>

mh at pixar.com wrote:
> I don't have access to site-packages, but I would like
> to provide versions of my c-language package compiled against
> python 2.4 and 2.5.
> 
> I "own" a library directory which is included in our site's
> sys.path.  Currently this is where the 2.4 shared libary
> is installed.
> 
> What's the most canonical way of doing this?  This is on linux.
> 
> Many TIA!
> Mark
> 

Normally, you would make 2 different distros which people could 
download, etc. But in this setting, if I get your meaning correctly, 
your best bet would be to wrap them in another module and let people 
import the wrapper module. The wrapper module would then use one the 
following calls to decide which version of your package to import:

py> import sys
py> sys.version
'2.5 (r25:51908, Oct 10 2006, 03:45:47) \n[GCC 4.0.1 (Apple Computer, 
Inc. build 5363)]'
py> sys.version_info
(2, 5, 0, 'final', 0)

James


From sjmachin at lexicon.net  Sat Sep 22 06:50:07 2007
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 22 Sep 2007 20:50:07 +1000
Subject: find difference in days from YYYYMMDD to YYYYMMDD
In-Reply-To: <mailman.920.1190453625.2658.python-list@python.org>
References: <mailman.920.1190453625.2658.python-list@python.org>
Message-ID: <46f4f360@news.eftel.com.au>

On 22/09/2007 7:37 PM, Konstantinos Pachopoulos wrote:
> Hi,
> does any body now any such algorith? to find difference in days from 
> YYYYMMDD to YYYYMMDD?


The literal answer to your question is, unsurprisingly, "Yes".

Now, what do you really want/need:

(a) details of an algorithm so that you can code it in Python
(b) an implementation of (a)
(c) a hint that Python might already have a standard module for date 
calculations
(d) a hint that there are things called search engines ... just copy 
your subject and paste it in


> Or just an algorithm, that converts YYYYMMDD to seconds since the epoch?
> 

There is no such thing as "the" (unqualified) epoch.

Try days_difference(from_date=your_chosen_epoch, to_date=some_date) * 24 
* 60 * 60


From sjmachin at lexicon.net  Sat Sep 15 07:03:19 2007
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 15 Sep 2007 21:03:19 +1000
Subject: reading xls file from python
In-Reply-To: <mailman.565.1189828276.2658.python-list@python.org>
References: <21903009.66741189806994236.JavaMail.www@wwinf4602>
	<mailman.565.1189828276.2658.python-list@python.org>
Message-ID: <46EBBBF7.8060003@lexicon.net>

On 15/09/2007 1:50 PM, Gabriel Genellina wrote:
> En Fri, 14 Sep 2007 18:56:34 -0300, <hassen62 at voila.fr> escribi?:
> 
>> I have installed python 2.5 for windows in my pc, I have a file xls 
>> say "file.xls" in c:/python25. How I can read this files from Python. 
>> Many thanks in advance.
> 
> Try xlrd: http://www.python.org/pypi/xlrd

In the interests of even-handedness:
http://www.velocityreviews.com/forums/t352440-how-to-read-excel-files-in-python.html
covers other possibilities.

OT: A note for the OP: It is not a good idea to store your data files 
(example: file.xls) in the folder of some installed software (example: 
c:/python25). You may need to re-install the software and this may trash 
your data. Consider storing data files in folders whose names give some 
hint as to their contents.

HTH,
John


From jstroud at mbi.ucla.edu  Mon Sep 17 21:50:52 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 17 Sep 2007 18:50:52 -0700
Subject: Try this
In-Reply-To: <mailman.631.1189985407.2658.python-list@python.org>
References: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>	<13eqsdfsfvsa16f@corp.supernews.com>	<1189969529.652871.19280@50g2000hsm.googlegroups.com>	<mailman.621.1189970593.2658.python-list@python.org>	<1189979679.969074.216490@y42g2000hsy.googlegroups.com>	<1189981681.745195.18130@y42g2000hsy.googlegroups.com>	<1189983233.709832.124290@19g2000hsx.googlegroups.com>
	<mailman.631.1189985407.2658.python-list@python.org>
Message-ID: <46EF2EFC.2040802@mbi.ucla.edu>

Steve Holden wrote:
> mensanator at aol.com wrote:
>> Makes you wonder what other edge cases aren't
>> handled properly.
>>
>> Makes you wonder why Microsoft doesn't employ
>> professional programmers.
>>
> Makes *me* wonder why you haven't got better things to do with your time.

Contributing to this thread is only slightly worse than just reading it 
in terms of wasting one's...

Just a moment, I'm having an epiphany!


From steve at REMOVE-THIS-cybersource.com.au  Thu Sep 13 18:42:28 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Thu, 13 Sep 2007 22:42:28 -0000
Subject: newbie: self.member syntax seems /really/ annoying
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189666095.727426.135170@o80g2000hse.googlegroups.com>
	<1189685403.306218.13270@22g2000hsm.googlegroups.com>
	<13eigagsuk74l55@corp.supernews.com>
	<1189712847.666826.230680@50g2000hsm.googlegroups.com>
Message-ID: <13ejf6k4b29o8db@corp.supernews.com>

On Thu, 13 Sep 2007 12:47:27 -0700, Carl Banks wrote:

> On Sep 13, 9:55 am, Steven D'Aprano <st... at REMOVE-THIS-
> cybersource.com.au> wrote:
>> On Thu, 13 Sep 2007 12:10:03 +0000, timothy.soehn... at gmail.com wrote:
>> > Why not use '_' as the self variable.  It is minimal and achieves
>> > close to '.var', as '_.var' isn't that different.  I know its a
>> > little perl-esque, but its not a bad convention if you are aiming to
>> > up readability of your code.
>>
>> I think the definitions of "up" or "readability" you are using are very
>> different from mine. To me, to up something means to increase it, and
>> readability means the ease of comprehension when reading something. You
>> seem to be using the opposite definition for one or the other.
> 
> 
> He's not.  People who've never done a lot of numerical programming might
> have a hard time understanding this, but what is considered readable for
> "ordinary" programming is just does not apply when reading and writing
> pages of mathematical formulae.

Teaching your grandmother to suck eggs. I'm not a professional coder, but 
I'm not a stranger to numerical programming either.

[snip]

> The most readable numerical code looks as much like the printed
> equations as possible.  "self." is a distraction; it's not in the
> original formula; it's boilerplate.  It takes away from the readability
> of the code.  Assuming that you can't get rid of the attribute syntax,

Why would you assume that?

Go back to the beginning of this thread, and you'll see that I suggested 
that the Original Poster stop forcing his maths functions into classes 
and put them in functions where they belong. As far as I'm concerned, 
this thread has clearly evolved to no longer be specifically about the 
OP's problem that classes don't read like maths functions (that's a 
solved problem -- don't use classes) and is now discussing the generic 
issue that some people don't have good taste when it comes to programming 
languages.


-- 
Steven.


From s.mientki at id.umcn.nl  Mon Sep 17 10:55:12 2007
From: s.mientki at id.umcn.nl (stef)
Date: Mon, 17 Sep 2007 16:55:12 +0200
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <46e9b09c$0$7685$9b4e6d93@newsspool2.arcor-online.net>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>	<1189604018.520338.162520@57g2000hsv.googlegroups.com>	<mailman.486.1189693844.2658.python-list@python.org>	<13eim00ha4lf356@corp.supernews.com>	<Xns99AA68B097778OKB@199.45.49.11>	<5ktfb5F5ctrvU1@mid.individual.net>	<46e98e01$0$30383$9b4e6d93@newsspool4.arcor-online.net>	<46e9921e$0$26251$426a74cc@news.free.fr>	<46e995d1$0$16120$9b4e6d93@newsspool1.arcor-online.net>
	<mailman.503.1189715816.2658.python-list@python.org>
	<46e9b09c$0$7685$9b4e6d93@newsspool2.arcor-online.net>
Message-ID: <9825f$46ee9550$83aef404$1658@news2.tudelft.nl>

Wildemar Wildenburger wrote:
> stef mientki wrote:
>> Wildemar Wildenburger wrote:
>>> Bruno Desthuilliers wrote:
>>>  
>>>> OTHO, simple math-illeterate programmers like me will have hard 
>>>> time maintaining such a code.
>>>>     
>>> Certainly, but again: Such main people are not the intended 
>>> audience. The code is for people that know how to read these 
>>> equations. I think a general rule of (any form of) writing is to 
>>> write with your audience in mind. I always do that and happily, that 
>>> audience is usually naked.
>>>
>>>
>>>   
>> Wouldn't Mathematica, Maple or MathCad be a far better choice ?
>>
> Well, those cost money ...
Maxima doesn't

cheers,
Stef


From torerik81 at gmail.com  Sat Sep 15 04:08:33 2007
From: torerik81 at gmail.com (=?ISO-8859-1?Q?Tor_Erik_S=F8nvisen?=)
Date: Sat, 15 Sep 2007 10:08:33 +0200
Subject: Just bought Python in a Nutshell
In-Reply-To: <96f089100709150107t10275d23p6b8cb7be6e748b7f@mail.gmail.com>
References: <eb79828c0709132112o5a3e7137n5ae5cd55e3e0b839@mail.gmail.com>
	<mailman.520.1189748935.2658.python-list@python.org>
	<1189784843.896396.108960@g4g2000hsf.googlegroups.com>
	<eb79828c0709141312v588ef074w25c2200c37951098@mail.gmail.com>
	<59f9c5160709141412q1098a4cbi989b6eed2f2cc899@mail.gmail.com>
	<eb79828c0709141432t582ddccbsda4750a4011666a9@mail.gmail.com>
	<eb79828c0709141459y264bc21fg4fcd17a4217cad65@mail.gmail.com>
	<46EB5B10.2020100@gmail.com>
	<96f089100709150107t10275d23p6b8cb7be6e748b7f@mail.gmail.com>
Message-ID: <96f089100709150108t7619b726h42a6005892f80ed1@mail.gmail.com>

Python in a nutshell also comes in a second edition:
http://www.oreilly.com/catalog/pythonian2/index.html. Here, many of
the new features in Python 2.5 are included. I haven't read through
the first the edition, but I can honestly say that reading through the
second edition has made me a better programmer, not just a better
Python programmer. I only wish I'd read through it earlier, which
would have saved me a lot of agony:)

-Tor Erik


From zentraders at gmail.com  Sun Sep  2 10:17:27 2007
From: zentraders at gmail.com (Zentrader)
Date: Sun, 02 Sep 2007 14:17:27 -0000
Subject: list index()
In-Reply-To: <1188498199.557521.31700@z24g2000prh.googlegroups.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
	<slrnfde2ei.1ek.horpner@FIAD06.norwich.edu>
	<1188498199.557521.31700@z24g2000prh.googlegroups.com>
Message-ID: <1188742647.266967.33720@w3g2000hsg.googlegroups.com>

On Aug 30, 11:23 am, zzbba... at aol.com wrote:
> Neil, Steve,
>
> Thanks for the responses on sets. I have not used them before and was
> not even aware Python had them. I will try them out.

And if there weren't sets you would still not use find or index but a
brute force method or dictionaries
for each in dir_a_list :
   if each not in dir_b_list :
      print each, "not in dir_b"



From deets at nospam.web.de  Thu Sep 27 09:34:11 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 27 Sep 2007 15:34:11 +0200
Subject: Confusion regarding constructor as default value
References: <1190898221.833936.40480@57g2000hsv.googlegroups.com>
Message-ID: <5m1pqjFb5l19U1@mid.uni-berlin.de>

 aine_canby at yahoo.com wrote:

> Why are the following different?
> 
> def AddRow(self, rowName, tableRow=TableRow(ReleaseDate(""),
> ExpiryDate(""))):
> # check to see if the row already exists, if not add it to the
> container
> 
> if not self.dict.has_key(rowName):
> self.dict[rowName] = tableRow
> 
> def AddRow(self, rowName, tableRow):
> # check to see if the row already exists, if not add it to the
> container
> 
> if not self.dict.has_key(rowName):
> self.dict[rowName] = TableRow(ReleaseDate(""), ExpiryDate(""))
> 
> It seems that when I use the first function that I'm getting duplicate
> objects in self.dict
> 
> Thanks for your help,

It's a FAQ. 

http://effbot.org/pyfaq/why-are-default-values-shared-between-objects.htm

Diez


From facundobatista at gmail.com  Mon Sep 10 16:25:11 2007
From: facundobatista at gmail.com (Facundo Batista)
Date: Mon, 10 Sep 2007 17:25:11 -0300
Subject: Python tickets summary
Message-ID: <e04bdf310709101325o1315adb0pebcb2f33d8313f35@mail.gmail.com>

People:

I modified my tool, whichs makes a summary of all the Python tickets
(I moved the source where the info is taken from SF to our Roundup).

In result, the summary is now, again, updated daily:

  http://www.taniquetil.com.ar/facundo/py_tickets.html


Enjoy it.

Regards,

-- 
.    Facundo

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


From guettli.usenet at thomas-guettler.de  Wed Sep 19 05:32:27 2007
From: guettli.usenet at thomas-guettler.de (Thomas Guettler)
Date: 19 Sep 2007 09:32:27 GMT
Subject: AttributeError: How to list existing attributes?
Message-ID: <5lc8lbF79ba8U1@mid.individual.net>

Hi,

how can you list the attributes of an object if you catch an
AttributeError?

I couldn't find a reference in the exception object, which
points to the object.

I want to call dir() on the object to list the user the known
attributes.

Is there a way to find the object by inspecting the stacktrace?

 Thomas

-- 
Thomas G?ttler, http://www.thomas-guettler.de/ http://www.tbz-pariv.de/
E-Mail: guettli (*) thomas-guettler + de
Spam Catcher: niemand.leermann at thomas-guettler.de



From stefan.behnel-n05pAM at web.de  Sun Sep 16 13:03:34 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Sun, 16 Sep 2007 19:03:34 +0200
Subject: SVG to raster conversion.
In-Reply-To: <mailman.613.1189958286.2658.python-list@python.org>
References: <mailman.613.1189958286.2658.python-list@python.org>
Message-ID: <46ED61E6.9010500@web.de>

J. Cliff Dyer wrote:
> Does anybody know a good solution (preferably in python) for rasterizing
> SVG or other vector graphics.
> 
> I'm thinking something like
> 
> vector_image = SVGFile(path_to_image)
> raster_image = vector_image.rasterize(format, (width, height), dpi)
> raster_image.write(out_file)
> 
> Thanks for any pointers you might have.

The GIMP can do it, and you can even program it in Python.

Stefan


From googlegroupie at coloraura.com  Sun Sep 30 13:12:22 2007
From: googlegroupie at coloraura.com (Daniel Pitts)
Date: Sun, 30 Sep 2007 17:12:22 -0000
Subject: which language allows you to change an argument's value?
In-Reply-To: <1191149233.346818.246170@22g2000hsm.googlegroups.com>
References: <1191149233.346818.246170@22g2000hsm.googlegroups.com>
Message-ID: <1191172342.592020.116230@k79g2000hse.googlegroups.com>

On Sep 30, 3:47 am, Summercool <Summercooln... at gmail.com> wrote:
> I wonder which language allows you to change an argument's value?
> like:
>
> foo(&a) {
>   a = 3
>
> }
>
> n = 1
> print n
>
> foo(n)     # passing in n, not &n
> print n
>
> and now n will be 3.  I think C++ and PHP can let you do that, using
> their reference (alias) mechanism.  And C, Python, and Ruby probably
> won't let you do that.  What about Java and Perl?
>
> is there any way to prevent a function from changing the argument's
> value?
>
> isn't "what i pass in, the function can modify it" not a desireable
> behavior if i am NOT passing in the address of my argument?  For one
> thing, if we use a module, and call some functions in that module, and
> the module's author made some changes to his code, then we have no way
> of knowing what we pass in could get changed.  Of course, if it is in
> Java, Python, and Ruby, and we pass in a reference to object (not C+
> +'s meaning of alias reference), so the object can get changed, but
> that can be expected, vs passing in n, when n = 1.  Even when it is
> Ruby, when everything is an object, passing n in when n = 1 won't ever
> make n become 3.  Is there a way to prevent it from happening in the
> languages that allows it?

Some would say that in truely good OO design, the state should be
protected by the object (not the constness of the reference to the
object)



From jeff at jmcneil.net  Wed Sep 12 16:15:06 2007
From: jeff at jmcneil.net (Jeff McNeil)
Date: Wed, 12 Sep 2007 16:15:06 -0400
Subject: xmlrpclib and SimpleXMLRPCServer questions
In-Reply-To: <1189626704.033328.9500@k79g2000hse.googlegroups.com>
References: <1189626704.033328.9500@k79g2000hse.googlegroups.com>
Message-ID: <82d28c40709121315k375dee7eu902261f1d0f0aaf@mail.gmail.com>

Have a look at the XMLRPC specification @ http://www.xmlrpc.com/spec.
There is no representation of NULL/None, thus server refuses to
Marshall the 'None' value.  Update your server methods to return a
value other than None and that message will go away.

The other option is to set 'allow_none' to True on the Marshaller
object. Doing so will turn your 'None' return values into XML-RPC
'<nil/>' entities.  The 'nil' type is defined as an XMLRPC extension
(I'm not sure how widely adopted it is, though).  See
http://ontosys.com/xml-rpc/extensions.php.  I'm not sure you can do
that without inheriting from the dispatcher code and "rolling your
own."

I find it much easier to 'return True' and ignore the value.

-Jeff

On 9/12/07, xkenneth <xkenneth at gmail.com> wrote:
> So i've been trying to set up a simple server and client through
> XMLRPC in python.
>
> Here's my code:
>
> SERVER
>
> import SimpleXMLRPCServer
>
>
> class DataServer:
>     def __init__(self):
>         pass
>
>     def test(self,test):
>         self.this = test
>
>     def show(self):
>         print self.this
>
> server = SimpleXMLRPCServer.SimpleXMLRPCServer(("localhost", 8005))
> server.register_instance(DataServer())
> server.serve_forever()
>
> CLIENT
> import xmlrpclib
> server = xmlrpclib.Server('http://localhost:8005')
> server.test(5)
> server.show()
>
>
> Now, I'm getting the most odd callback from the client side:
>
> >>> server.show()
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "/opt/local/Library/Frameworks/Python.framework/Versions/2.4/
> lib/python2.4/xmlrpclib.py", line 1096, in __call__
>     return self.__send(self.__name, args)
>   File "/opt/local/Library/Frameworks/Python.framework/Versions/2.4/
> lib/python2.4/xmlrpclib.py", line 1383, in __request
>     verbose=self.__verbose
>   File "/opt/local/Library/Frameworks/Python.framework/Versions/2.4/
> lib/python2.4/xmlrpclib.py", line 1147, in request
>     return self._parse_response(h.getfile(), sock)
>   File "/opt/local/Library/Frameworks/Python.framework/Versions/2.4/
> lib/python2.4/xmlrpclib.py", line 1286, in _parse_response
>     return u.close()
>   File "/opt/local/Library/Frameworks/Python.framework/Versions/2.4/
> lib/python2.4/xmlrpclib.py", line 744, in close
>     raise Fault(**self._stack[0])
> xmlrpclib.Fault: <Fault 1: 'exceptions.TypeError:cannot marshal None
> unless allow_none is enabled'>
>
> What is causing this? The server recieves the data and seems to
> respond properly regardless of this error, so by all means i can
> always catch it, but that sounds stupid.
>
> Here I can verify the server process is indeed recieving the data
> (calling the client with two different values):
>
> localhost - - [12/Sep/2007 14:35:18] "POST /RPC2 HTTP/1.0" 200 -
> 5
> localhost - - [12/Sep/2007 14:35:41] "POST /RPC2 HTTP/1.0" 200 -
> 10
>
> Looking at the documentation:
>
> class SimpleXMLRPCServer(       addr[, requestHandler[,
> logRequests[allow_none[, encoding]]]])
>
> I'm not sure how to specify the allow_none value or it's type, how can
> i find out more?
>
> Thanks for the help!
>
> Regards,
> Ken
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From gagsl-py2 at yahoo.com.ar  Mon Sep 17 15:16:11 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 17 Sep 2007 16:16:11 -0300
Subject: return codes from os.spawn
References: <014901c7f91c$52493b40$9817100a@INDIALASON.COM>
Message-ID: <op.tytbs9emx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 17 Sep 2007 08:17:22 -0300, Nirmal <nirmaljs at lasonindia.com>  
escribi?:

> Hi,
>
> When I try running java through os.spawnv with P_NOWAIT,  it returns the
> process id
>
>>>> os.spawnv(os.P_NOWAIT, '$JAVA_HOME/bin', ('java', '$JAVA_HOME/bin/java
> ex3178 true'))
> 19524
>
> then I removed the command line parameter in the java command to fail  
> ( it
> should throw an exception)  the process and ran it. This time also it
> returned the process id .
>
>>>> os.spawnv(os.P_NOWAIT, '$JAVA_HOME/bin', ('java', '$JAVA_HOME/bin/java
> ex3178'))
> 21947
>
>
> And I tried the same by using P_WAIT  and it returned the same exit code
>
>>>> os.spawnv(os.P_WAIT, '$JAVA_HOME/bin', ('java', '$JAVA_HOME/bin/java
> ex3178 true))
> 127
>>>> os.spawnv(os.P_WAIT, '$JAVA_HOME/bin', ('java', '$JAVA_HOME/bin/java
> ex3178'))
> 127

> please let me know how can we identify that the process is completed
> successfully or not ?

All your examples fail to execute your program. The second argument is the  
program being executed, not only the directory. Should be the same as the  
first element of `args`. And the individual arguments should be separated.

os.spawnv(os.P_WAIT, '$JAVA_HOME/bin/java', ['$JAVA_HOME/bin/java',  
'ex3178', 'true'])

In this case it's easier to use spawnl:

os.spawnl(os.P_WAIT, '$JAVA_HOME/bin/java', 'java', 'ex3178', 'true')


-- 
Gabriel Genellina



From laurent.pointal at limsi.fr  Wed Sep 19 04:19:04 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Wed, 19 Sep 2007 10:19:04 +0200
Subject: lxml codespeak pages empty ? Come back.
In-Reply-To: <fcqll6$5ip$2@news2.u-psud.fr>
References: <fcqll6$5ip$2@news2.u-psud.fr>
Message-ID: <fcqm1o$5t5$1@news2.u-psud.fr>

Laurent Pointal a ?crit :
> I can no longer get codespeak's lxml page at http://codespeak.net/lxml/ 
> (get an empty HTML document <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 
> Transitional//EN"><html><head><title></title></head><body></body></html>)... 
> 
> 
> Am-I alone in this case ?
> Any codespeaker reading ?

It magically come-back....


From kyosohma at gmail.com  Tue Sep  4 11:01:54 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Tue, 04 Sep 2007 15:01:54 -0000
Subject: Calling a dos batch file from python
In-Reply-To: <1188913362.279426.290370@r34g2000hsd.googlegroups.com>
References: <1188913362.279426.290370@r34g2000hsd.googlegroups.com>
Message-ID: <1188918114.131796.302250@19g2000hsx.googlegroups.com>

On Sep 4, 8:42 am, n o s p a m p l e a s e <nospam.ple... at alum.com>
wrote:
> Suppose I have a batch file called mybatch.bat  and I want to run it
> from a python script. How can I call this batch file in python script?
>
> Thanx/NSP

The subprocess module should work.

Mike



From jd at nospam.com  Thu Sep 13 03:56:20 2007
From: jd at nospam.com (Jd)
Date: Thu, 13 Sep 2007 00:56:20 -0700
Subject: hang in multithreaded program / python and gdb.
Message-ID: <bY-dna0hGepYcXXbnZ2dnUVZ_vKdnZ2d@comcast.com>

Hi
   I want to debug a locking situation in my program.

   http://wiki.python.org/moin/DebuggingWithGdb

   Where do I get binaries for ?
     - debug python 2.5 binary/rpm for FC7

   Also, the description of the hang is as follows.

   2 therads waiting in sem_wait at GLIBC_2.0 ... from PyThread_acquire_lock()

   1 thread in _poll from _socketmodule.so.

   Any ideas what might be going on. (Isnt PyThread_acquire_lock()
trying to get the global interpreter lock ?)

  Any help.. pointers are welcome.

Thanks
/Jd


From conra2004 at yahoo.com  Sun Sep 23 10:21:33 2007
From: conra2004 at yahoo.com (yadin)
Date: Sun, 23 Sep 2007 07:21:33 -0700
Subject: building a GUI
Message-ID: <1190557293.266783.251480@y42g2000hsy.googlegroups.com>

if i were up to make a GUI chich are the advantages of choosing python
over matlab or java?



From gagsl-py2 at yahoo.com.ar  Sun Sep 23 17:16:20 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 23 Sep 2007 18:16:20 -0300
Subject: Small changes in side library
References: <1190509647.227883.226460@d55g2000hsg.googlegroups.com>
Message-ID: <op.ty4ldifzx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 22 Sep 2007 22:07:27 -0300, maxim.gavrilov at gmail.com  
<maxim.gavrilov at gmail.com> escribi?:

> I have the side library which provides wide set of different
> functions, but I'm going to replace some of them with mine and
> provided such 'modified' library thought my project.
>
> The following way works well for my purpose:
>
> ------- mylib.py -------
> import sidelib
>
> import os, sys, ....
>
> def func():
>     .....
> sidelib.func = func
> ......
> ?!?!?!?!
> --------------------------
>
> But this cause to write mylib.sidelib.func() to function call, is it
> any way to 'map' definitions from sidelib to mylib (possible at point
> marked ?!?!?!?!) such that constructions like mylib.func() will be
> provided and client code don't see difference between changed and
> original library in syntax way?

Your code already works as you like:
import sidelib
sidelib.func()
and you get the modified function.

You don't have to say mylib.sidelib.func - in fact, mylib.sidelib is the  
same module object as sidelib
But you have to ensure that the replacing code (mylib.py) runs *before*  
anyone tries to import something from sidelib.

> One my idea was to do from sidelib import * and then modify globals()
> dictionary, but this isn't good too because mylib imports many other
> modules and they all mapped into it's namespace (like mylib.os,
> mylib.sys).

As you said, a bad idea.

-- 
Gabriel Genellina



From deets at nospam.web.de  Fri Sep 21 07:26:25 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 21 Sep 2007 13:26:25 +0200
Subject: Who can develop the following Python script into working
	application ?
References: <1190334828.210230.293980@50g2000hsm.googlegroups.com>
	<1190372423.768184.60080@19g2000hsx.googlegroups.com>
Message-ID: <5lho31F84jgjU1@mid.uni-berlin.de>

<snip/>
> Please help and let me know your terms.

There are websites dedicated to this - like e.g. 

http://www.guru.com/

Make an offer there.

Diez


From http  Sat Sep 22 05:28:54 2007
From: http (Paul Rubin)
Date: 22 Sep 2007 02:28:54 -0700
Subject: An Editor that Skips to the End of a Def
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87odfxjgjy.fsf@pobox.com> <7x4phpt9nf.fsf@ruckus.brouhaha.com>
	<87wsuj4152.fsf@pobox.com>
Message-ID: <7xabrf2gmh.fsf@ruckus.brouhaha.com>

jjl at pobox.com (John J. Lee) writes:
> > I think mousing takes more mental work than typing,
> I'm not sure this is a matter for debate, as much as physical
> measurement.

I don't know of any way to physically measure mental work.


From horpner at yahoo.com  Fri Sep 14 12:59:55 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Fri, 14 Sep 2007 16:59:55 GMT
Subject: where is help file?
References: <13el4vvna6jildc@corp.supernews.com>
	<mailman.539.1189779786.2658.python-list@python.org>
	<46eab4bc$0$3811$5402220f@news.sunrise.ch>
	<mailman.547.1189788809.2658.python-list@python.org>
Message-ID: <slrnfelfo6.sg.horpner@FIAD06.norwich.edu>

On 2007-09-14, Carsten Haese <carsten at uniqsys.com> wrote:
> On Fri, 2007-09-14 at 18:20 +0200, Martin Blume wrote:
>> AFAIK you have to import the module first, before you can get
>> help on that module.
>
> While that is true of the help(module_name) form, this is not
> necessary in the interactive helper you start by calling
> help().

The interactive help function is cool. You need to download and
install the HTML version of the standard docs to take the utmost
advantage of it.

-- 
Neil Cerutti


From gandalf at designaproduct.biz  Thu Sep 13 05:59:51 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Thu, 13 Sep 2007 11:59:51 +0200
Subject: I want py2exe not to create library.zip
In-Reply-To: <3P6dnfdlGPbez3XbnZ2dnUVZ_oaonZ2d@comcast.com>
References: <mailman.452.1189627963.2658.python-list@python.org>
	<3P6dnfdlGPbez3XbnZ2dnUVZ_oaonZ2d@comcast.com>
Message-ID: <46E90A17.303@designaproduct.biz>


> That is correct.  People want less files to distribute not more.  People 
> complain on py2exe list that it doesn't create a single .EXE file.  Don't
> try to update the program via patching "pieces".  Wrap everything in a proper 
> installer (I use and highly recommend Inno Setup).  It can handle version 
> control, there is a plug-in for over-the-wire updates, etc.  Best way I know of 
> to automate everything.
>   
It would be the best way for Windows. My program must work on different 
platforms: FreeBSD, Linux MS Windows and possibly Mac OS.

1. It would be too difficult to create an different auto updating method 
for MS Windows.
2. My auto update method updates only the changed .py files. Hopefully I 
will have many users. I do not want them to download a 10MB inno setup 
file after a small change in a py file.

The skip_archive option is the best. Thank you so much!

   Laszlo



From super.sgt.pepper at gmail.com  Fri Sep 21 18:36:32 2007
From: super.sgt.pepper at gmail.com (Cristian)
Date: Fri, 21 Sep 2007 22:36:32 -0000
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <1190413322.962737.53900@r29g2000hsg.googlegroups.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<1190413322.962737.53900@r29g2000hsg.googlegroups.com>
Message-ID: <1190414192.636397.146450@57g2000hsv.googlegroups.com>

On Sep 21, 3:22 pm, chris.monsa... at gmail.com wrote:
> On Sep 21, 6:07 pm, Cristian <super.sgt.pep... at gmail.com> wrote:
>
>
>
> > On Sep 21, 2:48 pm, chris.monsa... at gmail.com wrote:
>
> > > There are already anonymous functions in Python.
>
> > > lambda x, y, z: x + y + z
>
> > > is the same as:
>
> > > def _(x, y, z): return x + y + z
>
> > > As for the method stuff, check out staticmethod(). If you assign
> > > staticmethod(<function here>) to an object, it will be treated as a
> > > normal function and not as a "method."
>
> > > I have my own personal opinions about how methods should be in Python,
> > > but, whatever. It's weird to deal with stuff like this:
>
> > > x.y = re.match # Assign a function to an attribute of a class, but it
> > > doesn't work because you can't assign anything but methods!
> > > x.y = staticmethod(re.match) # Ugly
>
> > True, there is lambda, but that is very limited. It might be useful
> > for key arguments, but not much else. It doesn't solve the teaching
> > problem of "See, functions are just like any other data type. You can
> > assign it to a variable." It would be a footnote if it's mentioned at
> > all. My hope is to subtly reinforce the notion that functions are data
> > and can be passed around. The current function declaration doesn't
> > help with this. Creating a function and assigning it to a name is
> > exactly what Python does, why not have it come out in the syntax? It's
> > not necessary, yes, but I think it would be helpful for teaching
> > purposes.
>
> > Again, it's not necessary as much as it's more intuitive and obvious
> > what's going on. This helps a beginner sort out the process from the
> > syntax without taking it on faith. They can see the class declaration
> > and see "I'm defining just another attribute to this class only this
> > time it happens to be method".
>
> > There is nothing functionally lacking in Python. I'm just curious if
> > there's anything Python can do syntax-wise to help a person better
> > grasp programming ideas and Python's inner workings.
>
> Guido apparently doesn't like lambda; I'm not really sure why, it's
> extremely useful. There were rumors of it leaving in Python 3000, but
> thankfully there was the decision to keep them. (I have a feeling if
> they weren't kept in, a project fork would have happened or such.)
> Anyway, one of the biggest problems implementation wise is indentation
> in an expression - there is no expression currently that uses
> significant whitespace. Python draws a pretty clear line between
> expression and statement. I do agree with you however, it seems as if
> there is an arbitrary line between function definitions and normal
> variable assignment that shouldn't be there for the sake of
> consistency.
>
> A question: if you WERE to implement function definitions as normal
> expressions, how would you go about embedding it within an expression?
>
> x = map(def a:
>             <line of code>
>             <line of code>
>             <line of code>
>         , [1, 2, 3])
>
> It looks hideous in my opinion and lining up the , with the def is
> ugly. Not to mention currently, inside groupings, whitespace is
> ignored. How would you handle a whitespace signif. expression inside a
> grouping which by definition ignores whitespace?

Yeah, I agree, that does look pretty ugly. Correct me if I'm wrong,
but I thought the way Python determines a block is by the whitespace
of the first line. So, as long as the spacing (or !tabbing!) is
consistent from line to line the parser will know it's part of the
same block. From that I don't think the parser would have much trouble
extracting the function definition from the above example. I would
change the word "def". That's never been informative enough for me. I
would follow Javascript and call it "function." Also, I think
parentheses should be required.

If there's no implementation problem, I don't see why Python shouldn't
allow the above example, but I would certainly discourage it. Just
like Python doesn't prevent you from writing an insanely long and
convoluted function, Python shouldn't enforce any arbitrary length in
anonymous functions. I think the above example should be discouraged
as a style violation, not syntax.



From sbassi at clubdelarazon.org  Mon Sep 17 09:32:26 2007
From: sbassi at clubdelarazon.org (Sebastian Bassi)
Date: Mon, 17 Sep 2007 10:32:26 -0300
Subject: Saving parameters between Python applications?
In-Reply-To: <1190032732.277479.221680@o80g2000hse.googlegroups.com>
References: <1189969538.830532.98840@g4g2000hsf.googlegroups.com>
	<mailman.624.1189977946.2658.python-list@python.org>
	<1190032732.277479.221680@o80g2000hse.googlegroups.com>
Message-ID: <9e2f512b0709170632l461136b6sf8f98225ded3b3ea@mail.gmail.com>

On 9/17/07, Stodge <stodge at gmail.com> wrote:
> Good idea, but I can't guarantee that the two scripts will be run from
> the same directory - so where to store the pickle?

It doesn't matter if is the same directory or not, as long as both
programs has access to the pickle file (one program should have write
access and the other program should have at least read access).

-- 
Sebasti?n Bassi (???????). Diplomado en Ciencia y Tecnolog?a.
Curso Biologia molecular para programadores: http://tinyurl.com/2vv8w6
GPG Fingerprint: 9470 0980 620D ABFC BE63 A4A4 A3DE C97D 8422 D43D

From brenNOSPAMbarn at NObrenSPAMbarn.net  Thu Sep 13 13:17:49 2007
From: brenNOSPAMbarn at NObrenSPAMbarn.net (OKB (not okblacke))
Date: Thu, 13 Sep 2007 17:17:49 GMT
Subject: newbie: self.member syntax seems /really/ annoying
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189604018.520338.162520@57g2000hsv.googlegroups.com>
	<mailman.486.1189693844.2658.python-list@python.org>
	<13eim00ha4lf356@corp.supernews.com>
Message-ID: <Xns99AA68B097778OKB@199.45.49.11>

Steven D'Aprano wrote:

>> And I agree with the OP that the convention is really annoying.
>> 
>>   self.rect.width = self.foo(self.rect.x + self.rect.y) * self.boo()
>> 
>> is much less concise than
>> 
>>   s.rect.width = s.foo(s.rect.x + s.rect.y) * s.boo()
> 
> 
> Y do u thnk bng cncis is lwys a gd thng?

    	No, but the point being made is that it would be better IN THIS 
CASE.

-- 
--OKB (not okblacke)
Brendan Barnwell
"Do not follow where the path may lead.  Go, instead, where there is
no path, and leave a trail."
	--author unknown


From steve at holdenweb.com  Tue Sep  4 09:42:24 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 04 Sep 2007 06:42:24 -0700
Subject: REGULAR EXPRESSION
In-Reply-To: <1188912767.360967.306050@y42g2000hsy.googlegroups.com>
References: <1188912767.360967.306050@y42g2000hsy.googlegroups.com>
Message-ID: <fbjnc1$i8b$1@sea.gmane.org>

AniNair wrote:
> hi.. I am trying to match '+ %&/-' etc using regular expression  in
> expressions like 879+34343. I tried \W+   but it matches only in the
> beginning of the string Plz help Thanking you in advance...
> 
Perhaps you could give a few example of strings that should and 
shouldn't match? It isn't clear from your description what pattern you 
are trying to find.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From gagsl-py2 at yahoo.com.ar  Mon Sep 24 22:40:31 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 24 Sep 2007 23:40:31 -0300
Subject: Regular Expressions: Can't quite figure this problem out
References: <496954360709241737o6e42e7efk29886b5631f6ca2e@mail.gmail.com>
	<a49e45f50709241827i107d0acav28431853ef403702@mail.gmail.com>
	<496954360709241853w6bb6e813ved0ec4fc80304d51@mail.gmail.com>
	<op.ty6tjyfqx6zn5v@gabriel2.softlabbsas.com.ar>
	<496954360709241917m3801e4aavee29cfef7deaf41b@mail.gmail.com>
Message-ID: <op.ty6u1tgix6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 24 Sep 2007 23:17:59 -0300, Robert Dailey <rcdailey at gmail.com>  
escribi?:

> On 9/24/07, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>>
>> Yes: forget about regular expressions. ElementTree does that for free:
>
> That's not an option.

Ok, keep fighting with REs - good luck!

-- 
Gabriel Genellina



From pyth0nc0d3r at gmail.com  Tue Sep 18 17:01:39 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Tue, 18 Sep 2007 16:01:39 -0500
Subject: How would I go about checking if a authentication login actually
	exists.
Message-ID: <eb79828c0709181401k4a9c09b6m85a0b735882f8b4@mail.gmail.com>

Okay, I've written this script to check if a password works right, but how
do I know if an authentication actually exists?
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From Sean.Sugrue at analog.com  Fri Sep 28 10:57:56 2007
From: Sean.Sugrue at analog.com (Sugrue, Sean)
Date: Fri, 28 Sep 2007 10:57:56 -0400
Subject: OCBC connection
Message-ID: <8FDC0F9BE1F91D44BE964AA54AAA67B629B33F88@wilmexm3.ad.analog.com>

I'm trying to make an odbc connection to postgresql which is on a server
using python.
Does anyone have a code snippet to make a basic connection with a select
query?

Sean


From DouhetSukd at gmail.com  Fri Sep 14 11:47:23 2007
From: DouhetSukd at gmail.com (DouhetSukd at gmail.com)
Date: Fri, 14 Sep 2007 08:47:23 -0700
Subject: Just bought Python in a Nutshell
In-Reply-To: <mailman.520.1189748935.2658.python-list@python.org>
References: <eb79828c0709132112o5a3e7137n5ae5cd55e3e0b839@mail.gmail.com>
	<mailman.520.1189748935.2658.python-list@python.org>
Message-ID: <1189784843.896396.108960@g4g2000hsf.googlegroups.com>

I respectfully disagree with Shawn, in this case.

Don't skim Nutshell, unless you know very little Python, and even then
it is really the wrong book.  It is rather dry reading and provides
very little of the usual user-friendly introductions to language
features by solving simple problems.

Doesn't sound like that much of an endorsement, does it?  Well, in
fact, it is pretty much my most used Python book (out of 7 or 8
others).

If you read Alex's posts in this newsgroup, you'll see that he is one
of the most pragmatic and rigorous posters who usually contributes
code that elegantly and simply solves the issue at hand with the
minimum amount of clutter.

What Python in a Nutshell is really good at is showing you exactly
what Python is capable of doing, feature by feature, in a thoroughly
Pythonic way for the feature.  With code and exact implication.  For
example, I know Python well but I am kinda lacking in metaclass
comprehension.  If I were to write some non-trivial metaclasses I
would surely have his 3 or 4 pages open on my desk as I write code and
skim through other internet postings.  Those 3-4 pages have kinda made
my brain shrivel every time I've looked at them, but they are the
clearest overview I've seen of what is probably one of the hardest
Python features to understand.

For normal, easy-to-understand Python, Nutshell really dissects the
languages with new insight.  The information is dense, because each
word has its place and there very little filler.  That's why skimming
it does not work for me, I just don't have the requisite sustained
attention span.

So, although I read almost all other computer books like Shawn does, I
don't think it applies in this particular case.  When you have a
particular aspect of Python in mind, use Nutshell.  Read up on 'look
before you leap' in it if you really want a sample of how it is
written.

Cheers



From attn.steven.kuo at gmail.com  Thu Sep  6 10:22:51 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: Thu, 06 Sep 2007 07:22:51 -0700
Subject: startswith( prefix[, start[, end]]) Query
In-Reply-To: <1189087752.538726.101350@r29g2000hsg.googlegroups.com>
References: <1189087752.538726.101350@r29g2000hsg.googlegroups.com>
Message-ID: <1189088571.239870.5020@d55g2000hsg.googlegroups.com>

On Sep 6, 7:09 am, cj... at bath.ac.uk wrote:
> Hi
>
> startswith( prefix[, start[, end]])  States:
>
> Return True if string starts with the prefix, otherwise return False.
> prefix can also be a tuple of suffixes to look for. However when I try
> and add a tuple of suffixes I get the following error:
>
> Type Error: expected a character buffer object
>
> For example:
>
> file = f.readlines()
> for line in file:
>     if line.startswith(("abc","df"))
>         CODE
>
> It would generate the above error
>

(snipped)

You see to be using an older version of Python.
For me it works as advertised with 2.5.1,
but runs into the problem you described with 2.4.4:

Python 2.5.1c1 (r251c1:54692, Apr 17 2007, 21:12:16)
[GCC 4.0.0 (Apple Computer, Inc. build 5026)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> line = "foobar"
>>> if line.startswith(("foo", "bar")): print line
...
foobar
>>> if line.startswith(("foo", "bar")):
...     print line
...
foobar


VS.

Python 2.4.4 (#1, Oct 18 2006, 10:34:39)
[GCC 4.0.1 (Apple Computer, Inc. build 5341)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> line = "foobar"
>>> if line.startswith(("foo", "bar")): print line
...
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: expected a character buffer object


--
Hope this helps,
Steven



From steve at holdenweb.com  Mon Sep 24 14:27:35 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 24 Sep 2007 14:27:35 -0400
Subject: calling the function of one class from another class
In-Reply-To: <3a4a8f930709220328h1ae25d10jd772e265cd298bcd@mail.gmail.com>
References: <33dffc910709220024l74b14267v93564df10f5af9a6@mail.gmail.com>
	<3a4a8f930709220328h1ae25d10jd772e265cd298bcd@mail.gmail.com>
Message-ID: <fd8vin$8a7$1@sea.gmane.org>

Furkan Kuru wrote:
> 
> 
> On 9/22/07, *Mridula Ramesh* <mridula.ccpl at gmail.com 
> <mailto:mridula.ccpl at gmail.com>> wrote:
> 
>     hi.
> 
>     i currently have code structured like this:
> 
>         classA():
>             def __init__():
>              ..............
>              ..............
>            
>             def fnc1():
>             ....................
>             ....................
> 
> 
>         classB():
>            def __init__():
>             ........................
>             ........................
>             classA.fnc1()    #this is where i get an error
> 
> 
>     TypeError: unbound method fnc1() must be called with classA instance
>     as first argument (got nothing instead)
> 
>     when i do  fnc1(classA) i get:
> 
>     NameError: global name 'fnc1' is not defined
> 
>     am i violating some programming rule by trying to call fnc1 in
>     classB? i am only now learning OO alongside python, so i'm not sure!
>     also, can someone please tell me where to go for more articles on
>     the classes and functions and calling them from other places?
> 
>     thanks a lot!
> 
>     mridula.
> 
>     --
>     http://mail.python.org/mailman/listinfo/python-list
>     <http://mail.python.org/mailman/listinfo/python-list>
> 
>  
> you should create an instance of ClassA:
>  
> a = ClassA()
> a.fnc1()
>  
Unfortunately this won't work either, as calling the method on an 
instance will automatically provide the instance as the first argument 
to the method call, but the method is defined to take no arguments.

> or if you want a static function you should declare the method as static
>  
> classA():
>     def __init__():
>      ..............
>      ..............
>     @staticmethod
>     def fnc1():
>     ....................
>     ....................

Although most often if you want a static function you should just define 
... a function!

The OP should read through the tutorial, or at least those sections 
dealing with function and class definitions. It appears (s)he may be 
trying to write Java in Python. That's never a satisfactory experience.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From thn at mail.utexas.edu  Wed Sep  5 13:56:29 2007
From: thn at mail.utexas.edu (Thomas Nelson)
Date: Wed, 05 Sep 2007 10:56:29 -0700
Subject: Looping through File Question
In-Reply-To: <1188997229.977198.23100@22g2000hsm.googlegroups.com>
References: <1188989934.436165.213680@w3g2000hsg.googlegroups.com>
	<1188992047.858695.174790@r34g2000hsd.googlegroups.com>
	<1188995195.932117.111440@k79g2000hse.googlegroups.com>
	<1188997229.977198.23100@22g2000hsm.googlegroups.com>
Message-ID: <1189014989.636557.265700@k79g2000hse.googlegroups.com>

> > > On Sep 5, 8:58 pm, planetmatt <planetm... at gmail.com> wrote:
>
> > > > I am a Python beginner.  I am trying to loop through a CSV file which
> > > > I can do.  What I want to change though is for the loop to start at
> > > > row 2 in the file thus excluding column headers.

The DictReader object automatically does this for you:

>>> data = """Name,age,job
... Tom,21,programmer
... Sara,22,chef
... Molly,23,doctor"""
>>> from csv import DictReader
>>> myStuff = DictReader(data.split('\n'))
>>> for line in myStuff:
...     print line
...
{'job': 'programmer', 'age': '21', 'Name': 'Tom'}
{'job': 'chef', 'age': '22', 'Name': 'Sara'}
{'job': 'doctor', 'age': '23', 'Name': 'Molly'}

HTH,
Tom



From yosuke at ccwf.cc.utexas.edu  Mon Sep  3 14:00:08 2007
From: yosuke at ccwf.cc.utexas.edu (yosuke at ccwf.cc.utexas.edu)
Date: Mon, 3 Sep 2007 18:00:08 +0000 (UTC)
Subject: trap setting attribute when the attribute is dict
Message-ID: <fbhi38$3rg$1@geraldo.cc.utexas.edu>

Hello all,

I have a question which might be simple or need some work around.

I want to do something like this.  My class/instance has a dict as a
property.  I want the instance to catch the change in the dict (change
in some values, addition/deletion of key/value etc) to be recognized by
the class instance.  

How can I do this?  Any suggestions are very well appreciated.



Here is an example of what I want my class to behave:

class test(object):
	def __init__(self):
		self._d = {}
		self._changed = False
	def getd(self):
		print 'called getd'
		return self._d
	# dont know what to do next
	def setd(self,val):
		print 'called setd', key, val
		self._d[key] = val
		self._changed = True
	d = property(getd,setd,None,None)

	def getc(self):
		return self._changed
	changed = property(getc,None,None,None)

if __name__ == '__main__':
	obj = test()
	print 'obj.changed = ', obj.changed
	print

	# I want obj to know that its propety d being changed here
	print "t.d['a'] = 1"
	obj.d['a'] = 1
	print

	# I want the "changed" property to be True
	print 'obj.changed = ', obj.changed









-- 
yosuke kimura
Center for Energy and Environmental Resources
The Univ. of Texas at Austin, USA


From jeremy+complangpython at jeremysanders.net  Wed Sep 12 08:17:55 2007
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Wed, 12 Sep 2007 13:17:55 +0100
Subject: newbie: self.member syntax seems /really/ annoying
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
Message-ID: <fc8ldj$rv$1@gemini.csx.cam.ac.uk>

Charles Fox wrote:

> I've just started playing around with Python, as a possible
> replacement for a mix of C++, Matlab and Lisp.  The language looks
> lovely and clean with one huge exception:  I do a lot of numerical
> modeling, so I deal with objects (like neurons) described
> mathematically in papers, by equations like

I thought it was horrible when I started, but now when looking at somebody
else's C++ code I find it very hard to work out whether something is a
global, a member or a local variable, unless they use some sort of naming
convention.

If you alias self as "s", it's only two more characters per variable access,
which is the same as the C++ "m_" naming convention.

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


From kyosohma at gmail.com  Fri Sep  7 09:42:20 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 07 Sep 2007 13:42:20 -0000
Subject: wxPython unexpected exit
In-Reply-To: <1189152617.169438.296630@d55g2000hsg.googlegroups.com>
References: <1189152617.169438.296630@d55g2000hsg.googlegroups.com>
Message-ID: <1189172540.784080.231440@22g2000hsm.googlegroups.com>

On Sep 7, 3:10 am, Jimmy <mcknight0... at gmail.com> wrote:
> Hi, wxPython is cool and easy to use, But I ran into a problem
> recently when I try to write a GUI.
> The thing is I want to periodically update the content of StatixText
> object, so after create them, I pack them into a list...the problem
> comes when I later try to extract them from the list! I don't know
> why?
> my code is as following:
>
> import wx, socket
> import thread
>
> class MyFrame(wx.Frame):
>
>         firstrun = 0
>         def __init__(self):
>                 wx.Frame.__init__(self, None, -1, 'Notifier')
>                 self.panel = wx.Panel(self, -1)
>                 self.length = 50
>                 self.scale = 0.6
>                 self.count = 5
>                 self.size = wx.Frame.GetSize(self)
>                 self.distance = self.size[1] / self.count
>                 self.labellist = []
>                 self.gaugelist = []
>
>         def ParseAndDisplay(self, data):
>                 print "Successful access to main Frame class"
>                 print 'And receive data: ', data
>                 if MyFrame.firstrun == 0:
>                         print 'First time run'
>                         items = 3
>                         for i in range(items):
>                                 self.labellist.append(wx.StaticText(self.panel, -1, data+str(i),
> (150, 50+i*20), (300,30)))
>                         MyFrame.firstrun = 1
>                 else:
>                         self.labellist[0].SetLabel('AAA')//PROGRAM WILL ABORT HERE!!!
>                         self.labellist[1].SetLabel("Guo")
>                         self.labellist[2].SetLabel("Qiang")
>
> class NetUdp:
>
>         def __init__(self):
>                 self.port = 8081
>                 self.s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
>                 self.s.bind(("", self.port))
>                 print "Listening on port", self.port
>
>         def recvdata(self):
>                 data, addr = self.s.recvfrom(1024)
>                 return data
>
> def netThread():
>         netudp = NetUdp()
>         while True:
>                 data = netudp.recvdata()
>                 frame.ParseAndDisplay(data)
>
> if __name__ == '__main__':
>         firstrun = 0
>         app = wx.PySimpleApp()
>         frame = MyFrame()
>         frame.Show()
> # start network thread first
>         id = thread.start_new_thread(netThread, ())
> # main wxpython loop begins
>         app.MainLoop()
>
> I know the code is ugly, but can anyone really save me here!

If you use threads that update the GUI, you need to take a look at the
following wiki page:
http://wiki.wxpython.org/LongRunningTasks

I've used the techniques therein and they *just work*. I'm not sure if
you can set values on items in a list or not. I've tried that sort of
thing and sometimes it works and sometimes it doesn't.

The wxPython group is probably the best place to ask these questions
anyway: http://www.wxpython.org/maillist.php

Mike




From michele.simionato at gmail.com  Wed Sep 12 08:46:45 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Wed, 12 Sep 2007 12:46:45 -0000
Subject: An ordered dictionary for the Python library?
In-Reply-To: <13efnmi4n959a59@corp.supernews.com>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<13efnmi4n959a59@corp.supernews.com>
Message-ID: <1189601205.503841.327170@o80g2000hse.googlegroups.com>

On Sep 12, 2:42 pm, Steven D'Aprano <st... at REMOVE-THIS-
cybersource.com.au> wrote:
> On Wed, 12 Sep 2007 07:33:45 +0000, Mark Summerfield wrote:
> In fact, I'm not sure what people mean by ordered dicts. I assume they
> mean the keys are ordered, not the values. But ordered by what? Insertion
> order? Modification order? Alphabetical order?

Insertion order.

 M.S.



From kay.schluehr at gmx.net  Sat Sep 22 03:47:37 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Sat, 22 Sep 2007 00:47:37 -0700
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <7xlkazgpc5.fsf@ruckus.brouhaha.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<1190413322.962737.53900@r29g2000hsg.googlegroups.com>
	<1190414192.636397.146450@57g2000hsv.googlegroups.com>
	<1190443748.907702.154660@22g2000hsm.googlegroups.com>
	<7xlkazgpc5.fsf@ruckus.brouhaha.com>
Message-ID: <1190447257.060479.141280@n39g2000hsh.googlegroups.com>

On 22 Sep., 08:56, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> Kay Schluehr <kay.schlu... at gmx.net> writes:
> > If you feel you can transform it into another unambigous grammar
> > mixing statements and expressions it's up to you.
>
> We got rid of the print statement for python 3.0.  Why not get rid
> of the rest of them too?  Just use expressions for everything, as
> works fine for plenty of other languages.

One might create a new dynamic functional+OO programming language,
where small statements like print, assert, raise etc. all become
functions and statements like while, for, with etc. become anonymous
closures. I think Logix had gone once in this direction but was
abandoned due to severe technical problems. So one might eventually
revive this project with another more sound technical base. Personally
I'm not sure it's worth a large effort and whether EasyExtend is the
right toolkit at hand. So it's definitely not Guido who will revive it
and also not me. Maybe some PyPy guys? What are we talking about -
really?



From mail at timgolden.me.uk  Thu Sep 27 12:06:04 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 27 Sep 2007 17:06:04 +0100
Subject: Cross-platform time out decorator
In-Reply-To: <fdgjnm$9rl$1@sea.gmane.org>
References: <1190802115.585306.250400@o80g2000hse.googlegroups.com>	<1190899882.702911.44670@w3g2000hsg.googlegroups.com>	<87k5qc18gf.fsf@mulj.homelinux.net>	<1190907553.425261.273400@w3g2000hsg.googlegroups.com>
	<fdgjnm$9rl$1@sea.gmane.org>
Message-ID: <46FBD4EC.8040207@timgolden.me.uk>

Steve Holden wrote:
> Joel wrote:
>> On Sep 27, 4:36 pm, Hrvoje Niksic <hnik... at xemacs.org> wrote:
>>> Joel <joel.schae... at gmail.com> writes:
>>>> I found the solution :
>>>> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/440569
>>>> describes a solution based on threads. I tested it and it works
>>>> perfectly.
>>> Note that, unlike the original alarm code, it doesn't really interrupt
>>> the timed-out method, it just returns the control back to the caller,
>>> using an exception to mark that a timeout occurred.  The "timed out"
>>> code is still merrily running in the background.  I don't know if it's
>>> a problem in your case, but it's an important drawback.
>> There should be a method to stop the thread though? I've never
>> programmed thread stuff in python and wasn't able to find how to do
>> it, would you happen to know how to "kill" the timed out thread?
>>
> There is no way to "kill" a thread, other than set a flag and have the 
> thread read it to realise the main thread wants it to stop.

This is more-or-less why I suggested earlier that you wouldn't
find anything straightforward. The signal mechanism, as far as
I know, is pretty much unique in terms of the support it gets
from the OS and the language combined. Any other solution will
end up papering over cracks.

TJG


From ziade.tarek at gmail.com  Thu Sep  6 16:10:06 2007
From: ziade.tarek at gmail.com (Tarek)
Date: Thu, 06 Sep 2007 20:10:06 -0000
Subject: Similarities between two modules
Message-ID: <1189109406.842053.134260@r34g2000hsd.googlegroups.com>

Hello,

I am looking for some python library that would help me to find
similarities between two modules of Python code. I am already playing
with the levensthein distance but I am looking for some tool that
would play with the tree code with stronger tests.
Any hint ? (or even a recipe)

regards

Tarek Ziad?



From jcd at sdf.lonestar.org  Sun Sep 16 16:52:48 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Sun, 16 Sep 2007 16:52:48 -0400
Subject: Python "with"
In-Reply-To: <fck2di$7to$1@ss408.t-com.hr>
References: <fck2di$7to$1@ss408.t-com.hr>
Message-ID: <46ED97A0.3070707@sdf.lonestar.org>

Ivan Voras wrote:
> Hi,
>
> I'm looking for a construct that's similar to (Turbo) Pascal's "with"
> statement. I read about the Python's new "with" statement, but I was
> dissapointed to learn that it does something different (I still don't
> see how it's better than try..except..finally, but that's not my question).
>
> Is there something similar to what I want that's Pythonic enough?
>
> (If you're not familiar with Pascal, here's how it works:
>
> with some.big.structure.or.nested.objects.element do begin
>      member1 := something;
>      member2 := something;
> end;
>
> which exactly translates to this equivalent:
>
> some.big.structure.or.nested.objects.element.member1 := something;
> some.big.structure.or.nested.objects.element.member2 := something;
>
> i.e. it's a wrist-saver. I think a similar feature exists in C99, for
> structs.
>
> I know it can be almost always done by using a temporary variable:
>
> tmp = some.big.structure.or.nested.objects.element
> tmp.member1 = something
> tmp.member2 = something
>   
You can import the members directly, using:

>>> from some.big.structure.or.nested.objects.element import member1,
member2

which requires you to know the variable names.  But if you want to do it
after the import, your tmp example is the way to go.  It would be less
ugly if your variable is named so that it still has some connection to
the purpose of the module.

There are other options, too:

>>> import some.big.structure.or.nested.objects.element as tmp

This will still make you prefix tmp to the variables, but you don't need
a separate statement devoted to rebinding the module to a new name. 

Personally, I don't find the shorter prefix all that ugly.  For me
ugliness and clarity are almost entirely synonymous when it comes to
code, so maintaining the certainty about where the variables came from
is a good thing.  I've just started a job where I have to maintain perl
code, so I keep running across things like

use File::Basename;
my $dir = dirname($fullpath);

and I keep wondering where basename came from.  Is it a builtin?  Was it
from File::  A prefix, no matter how short, how obscure, how
undescriptive, will let you trace exactly where each name came from. 
Which I find deeply beautiful.  All you have to do is look up the page,
and it's there somewhere.  You *can* do the same with Perl, but it's
actually discouraged by the structure of the language.  In other words,
the simplest case does the wrong thing.

Python does allow you to import all names from a module, unprefixed but
it leads you into the same ugliness and namespace clobbering that you
get with Perl, so I'm not going to tell you how to do it.

I think the 'import long.name as short' syntax will help your wrists the
most while still retaining the clarity of explicit module referencing. 
And you won't have the extraneous assignment (tmp = long.name)
cluttering up your code.

Cheers,
Cliff


From bbxx789_05ss at yahoo.com  Thu Sep 27 07:18:14 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Thu, 27 Sep 2007 04:18:14 -0700
Subject: Simple threading example freezes IDLE?
In-Reply-To: <mailman.1142.1190847709.2658.python-list@python.org>
References: <1190218626.334442.255450@57g2000hsv.googlegroups.com>
	<f1aa6d810709261450k575cf5b6s90615fc98a61eb1f@mail.gmail.com>
	<f1aa6d810709261600u6a7d1970q26d367ebf6ad01b3@mail.gmail.com>
	<mailman.1142.1190847709.2658.python-list@python.org>
Message-ID: <1190891894.679630.202880@w3g2000hsg.googlegroups.com>

On Sep 26, 5:01 pm, "Sergio Correia" <sergio.corr... at gmail.com> wrote:
>
> I'm using IDLE 1.2.1, Python 2.5.1, and Tk 8.4. Does anyone has any
> idea of why is this happening?
>

Two mainloops == bad.  IDLE == 1 mainloop.  your program == 1
mainloop.



From mail at timgolden.me.uk  Mon Sep 10 12:25:38 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Mon, 10 Sep 2007 17:25:38 +0100
Subject: shared memory pointer
In-Reply-To: <1189440232.421738.283100@k79g2000hse.googlegroups.com>
References: <1189436265.841415.234050@w3g2000hsg.googlegroups.com>	<mailman.325.1189437043.2658.python-list@python.org>
	<1189440232.421738.283100@k79g2000hse.googlegroups.com>
Message-ID: <46E57002.10806@timgolden.me.uk>

Tim wrote:
> I reviewed the mmap function and I have a question. In the example
> code below, what is the connection between the data in shared memory
> and the mmap function. The fileno is zero. Why is it zero? The size
> makes sense because there is 256 bytes in shared memory. The tag is
> MyFileMappingObject. This tag does not have anything in common with
> the shared memory. How can mmap point to any data in shared memory?
> There is no coorelation.
> 
> 
> pBuf = windll.kernel32.MapViewOfFile(hMapObject, FILE_MAP_ALL_ACCESS,
> 0, 0, SHMEMSIZE)
> if (pBuf == 0):
>     print "Could not map view of file"
>     raise WinError()
> else:
>     memcpy = cdll.msvcrt.memcpy
>     memcpy(pBuf, szMsg, len(szMsg))
> 
> shmem = mmap.mmap(0, 256, "MyFileMappingObject", mmap.ACCESS_WRITE)
> shmem.write("Message from Python process")

Your question seems a little strange. You appear to be creating
a memory mapping via ctypes and then expecting the Python mmap
module to know about it. Of course it doesn't. What you do is
to create two mmap mappings with the same tag name which --
under the covers -- point to the same shared memory. I just
tried it ad-hoc in two interpreters and it works fine.

I admit I am absolutely no expert on this area. My initial
suggestion was simply because your question triggered a
memory of what I'd seen elsewhere. Have a look at this
thread from a few years ago to see if it clarifies:

   http://www.thescripts.com/forum/thread25421.html

(although what it -- and your question -- clearly do clarify
is a lack of clarity in the documentation!)

TJG


From see_website at mindprod.com.invalid  Sun Sep 30 21:53:47 2007
From: see_website at mindprod.com.invalid (Roedy Green)
Date: Mon, 01 Oct 2007 01:53:47 GMT
Subject: which language allows you to change an argument's value?
References: <1191149233.346818.246170@22g2000hsm.googlegroups.com>
Message-ID: <jlk0g35iek44jhoqpbutp1ecj2e2c9dte6@4ax.com>

On Sun, 30 Sep 2007 10:47:13 -0000, Summercool
<Summercoolness at gmail.com> wrote, quoted or indirectly quoted someone
who said :

>and now n will be 3.  I think C++ and PHP can let you do that, using
>their reference (alias) mechanism.  And C, Python, and Ruby probably
>won't let you do that.  What about Java and Perl?

Seem to me you could in FORTRAN and Pascal, and maybe even Algol.  It
has been a while.

I have come to appreciate Java's strong isolation convention. It makes
it a lot easier to track down WHERE in the code a value could
potentially change and keeps those places to a minimum.

-- 
Roedy Green Canadian Mind Products
The Java Glossary
http://mindprod.com


From jstroud at mbi.ucla.edu  Thu Sep  6 17:50:34 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 06 Sep 2007 14:50:34 -0700
Subject: why should I learn python
In-Reply-To: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
Message-ID: <LC_Di.8274$924.7987@newssvr23.news.prodigy.net>

See www.python.org. Trust us all when we say that its the best.

windandwaves wrote:
> Can someone tell me why I should learn python?  I am a webdeveloper,
> but I often see Python mentioned and I am curious to find out what I
> am missing out on.
> 
> Thank you
> 
> Nicolaas
> 


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

http://www.jamesstroud.com/


From bj_666 at gmx.net  Mon Sep 24 03:09:01 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 24 Sep 2007 07:09:01 GMT
Subject: Would Anonymous Functions Help in Learning Programming/Python?
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<1190413322.962737.53900@r29g2000hsg.googlegroups.com>
	<1190414192.636397.146450@57g2000hsv.googlegroups.com>
	<1190443748.907702.154660@22g2000hsm.googlegroups.com>
	<7xlkazgpc5.fsf@ruckus.brouhaha.com>
	<1190447257.060479.141280@n39g2000hsh.googlegroups.com>
	<5lk2olF8gic1U5@mid.uni-berlin.de>
	<1190454275.282176.90830@k79g2000hse.googlegroups.com>
	<46f6e9b0$0$32168$426a74cc@news.free.fr>
	<1190597548.214612.181140@22g2000hsm.googlegroups.com>
Message-ID: <5lp64dF95s07U1@mid.uni-berlin.de>

On Sun, 23 Sep 2007 18:32:28 -0700, Kay Schluehr wrote:

> On 22 Sep., 02:14, Bruno Desthuilliers
> <bdesth.quelquech... at free.quelquepart.fr> wrote:
>> Kay Schluehr a crit :
>> (snip)
>>
>> > I checked out Io once and I disliked it. I expected Io's prototype OO
>> > being just a more flexible variant of class based OO but Io couples a
>> > prototype very closely to its offspring. When A produces B and A.f is
>> > modified after production of B also B.f is modified. A controls the
>> > state of B during the whole lifetime of B. I think parents shall not
>> > do this, not in real life and also not in programming language
>> > semantics.
>>
>> I may totally miss the point, but how is this different from:
>>
>> class A(object):
>>      def dothis(self):
>>          print "A.dothis(%s)" % self
>>
>> class B(A):
>>      pass
>>
>> b = B()
>>
>> b.dothis()
>>
>> def dothat(self):
>>      print "function dothat(%s)" % self
>>
>> A.dothis = dothat
>> b.dothis()
> 
> It's not a big deal because you do not use a class to propagate
> mutable state unless you are using a class attribute intentionally ( i
> guess you do not overuse it just to avoid object encapsulation and
> make everything global ). When using a prototype as in Io you need to
> protect the state of the child object yourself.

Just like in Python!  Here `things` are shared between all "children":

class A(object):
    things = list()

    def add(self, thing):
        self.things.append(thing)

This is what happens too when you use this Io snippet:

A := Object clone do(
    things := list()
    
    add := method(thing,
        self things append(thing)
    )
)

If you don't want `things` to be shared you write an `init` method, in
both Python and Io.  Python:

class B(object):
    def __init__(self):
        self.things = list()

    def add(self, thing):
        self.things.append(thing)

And Io:

B := Object clone do(
    init := method(
        self things := list()
        self
    )
    
    add := method(thing,
        self things append(thing)
    )
)

The `init` is called by the default `clone` method automatically just like
`__init__()` in Python.  It is really much like the class/instance
relationship in Python with just the line between class and instance
blurred.

> You can do this by overwriting the objects slots but then you end up
> writing your own object constructors and the templates accordingly, also
> named "classes" by some. Not having dedicated object constructors,
> member variable initializations and the presumed class definition
> boilerplate comes at the price of introducing them on your own.

The mechanism is already there in Io, no need to invent, just use it.

Ciao,
	Marc 'BlackJack' Rintsch


From koutoo at hotmail.com  Mon Sep 24 16:43:05 2007
From: koutoo at hotmail.com (koutoo at hotmail.com)
Date: Mon, 24 Sep 2007 13:43:05 -0700
Subject: Nested For and While Statements
In-Reply-To: <1190664112.564911.13480@57g2000hsv.googlegroups.com>
References: <1190662087.403000.16290@g4g2000hsf.googlegroups.com>
	<1190664112.564911.13480@57g2000hsv.googlegroups.com>
Message-ID: <1190666585.281623.228920@22g2000hsm.googlegroups.com>

On Sep 24, 3:01 pm, Paul McGuire <pt... at austin.rr.com> wrote:
> On Sep 24, 2:28 pm, kou... at hotmail.com wrote:
>
>
>
>
>
> > I start my code with some constants then a while statement.  But I
> > have some For statements towards the end within the While statement
> > where I start getting some errors.  I'm hoping I won't have to post my
> > code, but it looks something like this:
>
> > Import os, string
>
> > while this:
>
> >      All Code indented like it should
>
> >      Last line in While.
>
> >            For i in range(1)
> >                 class = []
> >                 class2 = []
> >                 For i in range(2)
> >                      Do this
> >                      And this
> >                      And that.
>
> >                      Next Line hits snag here?  Where should this line
> > be?
>
> Why are the for loops further indented than the body of the while?  If
> they are part of the while, "For i in range(1)" should line up with
> "Last line in While."  If they are not part of the while, but come
> after, then "For i in range(1)" should line up with "while this:".
>
> Also, as James Stroud said, your for loop indexes are the same
> variable.
>
> -- Paul- Hide quoted text -
>
> - Show quoted text -

My actual code has different variables, but thanks for pointing that
out.  I'm so used to coding in VB, where indenting isn't a problem, so
all this indenting is new to me how Python wants it dictated.  I made
the changes and still get an error at the same point after the second
For statement? So:

While :
     Code under while
     More under while.

     For (x)
          Part of x
          Last of x

          For(y)
               Part of y
               Still part of y
               last part of y.

          New line part of x #where does this belong?


     Last line under while not in For  #Should go under While, right?


If I want all my code to run under the while, then the While statement
should be the only line of code not indented once I state it then,
correct?



From tdwdotnet at gmail.com  Fri Sep 28 07:33:33 2007
From: tdwdotnet at gmail.com (Tim Williams)
Date: Fri, 28 Sep 2007 12:33:33 +0100
Subject: recipient validation with smtplib
In-Reply-To: <46FCE387.9070601@chamonix.reportlab.co.uk>
References: <46FCE387.9070601@chamonix.reportlab.co.uk>
Message-ID: <9afea2ac0709280433n361ce4fx2a26a05de2b1b1ae@mail.gmail.com>

On 28/09/2007, Robin Becker <robin at reportlab.com> wrote:
> Is there a way to use smtplib to get recipient validation. I can use smtplib
> quite happily to send emails using the locahost's sendmail, but sendmail is just
>  fire and forget, so some bad addresses eg idiot at www.dingo.zzz don't cause any
> error in the sending application. I know some smtp setups do enforce recipient
> validation, but it doesn't seem terribly easy to do this with sendmail. I
> wondered if there were some way to do this in python?

There is no way of  validating *every* email address you send to using
SMTP alone.   Some servers accept every address and bounce later - as
you have found out. So for the purpose of the SMTP client, or relaying
server,  the address is valid at sending time to those servers.

Checking DNS for MX records is a possibility for removing some bad
addresses, but it's not fool proof as the RFCs don't require MX
records to exist for a domain to be able to receive email.  If no MX
records are present, one (and only one!) IP address returned from the
domain's A record(s) should be tried.

HTH :)


From stephane.larouche at polymtl.ca  Wed Sep 19 09:29:25 2007
From: stephane.larouche at polymtl.ca (=?utf-8?b?U3TDqXBoYW5l?= Larouche)
Date: Wed, 19 Sep 2007 13:29:25 +0000 (UTC)
Subject: lambda-funcs problem
References: <1190201984.062329.182460@k79g2000hse.googlegroups.com>
	<06eb01c7fab5$0aa2bb50$0203a8c0@MOUSE>
Message-ID: <loom.20070919T152245-511@post.gmane.org>

Ryan Ginstrom <software <at> ginstrom.com> writes:
> How about:
> 
> >>> def make_adder(i):
> 	def adder(x):
> 		return x+i
> 	return adder
> 
> >>> funcs = [make_adder(i) for i in xrange(10)]
> >>> print [func(10) for func in funcs]
> [10, 11, 12, 13, 14, 15, 16, 17, 18, 19]
> >>> 

Or if you want a one liner:

funcs = [(lambda i: lambda x: x+i)(i) for i in xrange(10)]

St?phane



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Sep 20 07:54:04 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 20 Sep 2007 13:54:04 +0200
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
In-Reply-To: <1190263363.496695.83300@57g2000hsv.googlegroups.com>
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<fcq352$u0a$1@sea.gmane.org>
	<mailman.786.1190246955.2658.python-list@python.org>
	<1190263363.496695.83300@57g2000hsv.googlegroups.com>
Message-ID: <46f25f49$0$31908$426a34cc@news.free.fr>

TheFlyingDutchman a ?crit :
(snip)

> I am confused about the benefits/disadvantages of the "GIL removal".
> Is it correct that the GIL is preventing CPython from having threads?
> 
> Is it correct that the only issue with the GIL is the prevention of
> being able to do multi-threading?

http://docs.python.org/lib/module-thread.html
http://docs.python.org/lib/module-threading.html



From stargaming at gmail.com  Sun Sep 30 01:21:50 2007
From: stargaming at gmail.com (Stargaming)
Date: 30 Sep 2007 05:21:50 GMT
Subject: New to python
References: <1191126010.260942.89230@y42g2000hsy.googlegroups.com>
Message-ID: <46ff326e$0$17745$9b622d9e@news.freenet.de>

On Sat, 29 Sep 2007 21:20:10 -0700, Googy wrote:

> I am new to python...
> 
> The programming language i know well is C Can any one recommend me the
> good ebook for beginners. I have loads of ebooks but i am not able to
> decide which to start with which book. Also i am learning XML so later
> on i can switch to books on Python and XML but initially which book to
> read??
> 
> Please help...

Generically, `A byte of Python`_ and `Dive into Python`_ are pretty 
common. ABOP has a few comments for C programmers as well, AFAIK.

If you already got a few (e)books, you should perhaps just look through 
all of them and then, sequentially, read them.

.. _A byte of Python: http://www.byteofpython.info/download/
.. _Dive into Python: http://www.diveintopython.org/


From paulgeeleher at gmail.com  Sun Sep 30 11:39:35 2007
From: paulgeeleher at gmail.com (sophie_newbie)
Date: Sun, 30 Sep 2007 08:39:35 -0700
Subject: Create a string array of all comments in a html file...
Message-ID: <1191166775.660477.97840@o80g2000hse.googlegroups.com>

Hi, I'm wondering how i'd go about extracting a string array of all
comments in a HTML file, HTML comments obviously taking the format
"<!-- Comment text here -->".

I'm fairly stumped on how to do this? Maybe using regular expressions?

Thanks.



From deets at nospam.web.de  Tue Sep 11 11:00:47 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 11 Sep 2007 17:00:47 +0200
Subject: Car-ac-systems
References: <1189511932.371621.112970@o80g2000hse.googlegroups.com>	<BeqdnaFrktIgBHvbnZ2dnUVZ8v-dnZ2d@eclipse.net.uk>	<YaadnYyTWsmTAnvbnZ2dnUVZ_iydnZ2d@comcast.com>
	<cd6dnW0Vf8-wOnvbRVnyhwA@eclipse.net.uk>
	<mailman.390.1189522344.2658.python-list@python.org>
Message-ID: <5knosvF4ik9eU1@mid.uni-berlin.de>

Steve Holden wrote:

> John Timney (MVP) wrote:
>> Thats all it is.  It may have been a usefully intended resource once, but
>> they have no controls whatsoever.  Its time someone closed it down.
>> 
> What is it about "please do not top-post" that you have difficulty
> understanding? Or do "MVP"s feel that their time is so much more
> valuable than anyone else's that they are free to ignore the norms?
> 
> Furthermore, please don't do the spammer the favor of repeating the URL
> in yet another post. This only leaves further trails through the search
> engines for innocents to trip over.
> 
> Are you new to the Internet, or just generally clueless?

I took a look at his website - and so far, I have yet to encounter an MVP
that is not clueless. And who is not rubbing the fact that he got a pin
from MS into everybodies eyes.

But maybe he just wants to create visibility for his own linklist...

Diez


From Caseyweb at gmail.com  Thu Sep 27 13:21:38 2007
From: Caseyweb at gmail.com (Casey)
Date: Thu, 27 Sep 2007 17:21:38 -0000
Subject: True of False
In-Reply-To: <mailman.1175.1190913185.2658.python-list@python.org>
References: <1190910814.594559.30880@n39g2000hsh.googlegroups.com>
	<mailman.1173.1190911739.2658.python-list@python.org>
	<1190912324.363127.26100@r29g2000hsg.googlegroups.com>
	<mailman.1175.1190913185.2658.python-list@python.org>
Message-ID: <1190913698.660661.13000@19g2000hsx.googlegroups.com>

On Sep 27, 1:12 pm, "Richard Thomas" <R.W.Thomas... at cantab.net> wrote:
> On 27/09/2007, Casey <Casey... at gmail.com> wrote:
>
>
>
> > On Sep 27, 12:48 pm, "Simon Brunning" <si... at brunningonline.net>
> > wrote:
> > > On 9/27/07, kou... at hotmail.com <kou... at hotmail.com> wrote:
>
> > > > I tried writing a true and false If statement and didn't get
> > > > anything?  I read some previous posts, but I must be missing
> > > > something.  I just tried something easy:
>
> > > > a = ["a", "b", "c", "d", "e", "f"]
>
> > > > if "c" in a == True:
> > > >      Print "Yes"
>
> > > > When I run this, it runs, but nothing prints.  What am I doing wrong?
>
> > > Just use
>
> > > if "c" in a:
>
> > > and all will be well. The True object isn't the only truthy value in
> > > Python - see <http://docs.python.org/lib/truth.html>.
>
> > I would recommend the OP try this:
>
> > run the (I)python shell and try the following:
>
> > >>> a = [x for x in "abcdefg"]
> > >>> a
> > ['a','b','c','d','e','f','g']
> > >>> "c" in a
> > True
> > >>> "c" in a == True
> > False
> > >>> ("c" in a) == True
> > True
>
> > The reason your conditional failed is that it was interpreted as "c"
> > in (a == True) which is False.
> > the "==" operator binds at a higher precedence level than the "in"
> > operator, just as multiplication
> > binds higher than addition
>
> Actually it evaluates '("c" in a) and (a == True)'. You can check like so:
>
> import dis
> a = list("abcdef")
> dis.dis(lambda: "c" in a == True)
>
> And just follow the bytecode operations.
>
> -- Richard.
>
> > --
> >http://mail.python.org/mailman/listinfo/python-list

Doh, I forgot about operator chaining here.  I'm so used to just
seeing a < b < c that I forget about arbitrary operator chaining and
think like a C++ programmer!



From kar1107 at gmail.com  Tue Sep 11 19:10:42 2007
From: kar1107 at gmail.com (Karthik Gurusamy)
Date: Tue, 11 Sep 2007 16:10:42 -0700
Subject: How to insert in a string @ a index
In-Reply-To: <1189274564.462664.131240@22g2000hsm.googlegroups.com>
References: <1189274564.462664.131240@22g2000hsm.googlegroups.com>
Message-ID: <1189552242.225202.43380@i13g2000prf.googlegroups.com>

On Sep 8, 11:02 am, lolu... at gmail.com wrote:
> Hi;
>
> I'm trying to insert XYZ before a keyword in a string. The first and
> the last occurence of hello in the string t1 (t1="hello world hello.
> hello \nwhy world hello") are keywords. So after the insertion of XYZ
> in this string, the result should be t1 = "XYZhello world hello. hello
> \nwhy world XYZhello"
>
> The python doesn't supports t1[keyword_index]="XYZhello" (string
> object assignment is not supported). How do I get to this problem? Any
> sugguestions?

Yet another solution using re

>>> t1 = 'hello world hello. hello. \nwhy world hello'

>>> import re
>>> l1 =  re.split('hello', t1)
>>> l1[0] = 'XYZ' + l1[0]
>>> l1[-2] += 'XYZ'
>>> 'hello'.join(l1)
'XYZhello world hello. hello. \nwhy world XYZhello'
>>>

If there are less than two 'hello', you'll get exception and needs
special handling.

Karthik

>
> -a.m.



From bignose+hates-spam at benfinney.id.au  Sun Sep 23 07:57:45 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 23 Sep 2007 21:57:45 +1000
Subject: Factory function with keyword arguments
References: <13fbl9ertj5es12@corp.supernews.com>
	<mailman.938.1190537767.2658.python-list@python.org>
	<13fchhi2mnm5tc8@corp.supernews.com>
Message-ID: <87zlzdppae.fsf@benfinney.id.au>

Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> writes:

> A valuable lesson... always measure before guessing whether code
> will be slow or not.

And after measuring, don't guess then either :-)

-- 
 \                "Science doesn?t work by vote and it doesn?t work by |
  `\          authority." ?Richard Dawkins, Big Mistake (The Guardian) |
_o__)                                                                  |
Ben Finney


From deets at nospam.web.de  Sat Sep 15 10:49:52 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 15 Sep 2007 16:49:52 +0200
Subject: Can You Program?
In-Reply-To: <1189865720.546424.155860@d55g2000hsg.googlegroups.com>
References: <1189679878.271415.88700@w3g2000hsg.googlegroups.com>
	<1189865720.546424.155860@d55g2000hsg.googlegroups.com>
Message-ID: <5l29p6F63jd1U1@mid.uni-berlin.de>

> Hey, thanks for spamming our group. Perhaps you should try again after
> you learn proper HTML coding.
> Results from http://validator.w3.org/ : Failed validation, 26 Errors
> 
> Really, really doubt that you are doing anything but trying to gather
> e-mails. My 12 year old has made better sites.
> 
> Oh, and does jobslide.com know that you are linking to images on their
> site? I'll be mentioning that to them, just so you know.
> 
> Please, put down the keyboard and step away from the computer......
> 

And thanks to you, the spammer got another post containing his website, 
increasing page-rank. Well done!

Diez


From gagsl-py2 at yahoo.com.ar  Mon Sep  3 23:59:24 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 04 Sep 2007 00:59:24 -0300
Subject: Can you use -getattr- to get a function in the current module?
References: <f1aa6d810709031613r74fc74f0ub9efcc3e4f3b26c1@mail.gmail.com>
Message-ID: <op.tx32paapx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 03 Sep 2007 20:13:43 -0300, Sergio Correia  
<sergio.correia at gmail.com> escribi?:

> # Module spam.py
>
> import eggs
>
> print getattr(eggs, 'omelet')(100)
>
> That is, I just call the function omelet inside the module eggs and
> evaulate it with the argument 100.
>
> But what if the function 'omelet' is in the module where I do the
> getattr (that is, in spam.py).  If I do any of this

Use globals():

print globals()['omelet'](100)

(Of course this only makes sense when using a variable instead of  
'omelet'...)

-- 
Gabriel Genellina



From steve at holdenweb.com  Fri Sep 21 10:29:21 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 21 Sep 2007 10:29:21 -0400
Subject: __contains__() and overload of in : Bug or Feature ???
In-Reply-To: <1190383050.514560.232660@50g2000hsm.googlegroups.com>
References: <1190383050.514560.232660@50g2000hsm.googlegroups.com>
Message-ID: <fd0kg1$ur6$1@sea.gmane.org>

sebastien.lannez at gmail.com wrote:
> Thanks for your quick response.
> 
>>> I need to overload the operator in and let him
>>> return an object ... It seems it is not a
>>> behavior Python expect :
>>>
>>>>>> class A:
>>> ...    def __contains__(self,a):
>>> ...        return 'yop'
>>> ...
>>>>>> a=A()
>>>>>> print 'toto' in a
>>> True
>>>>>> print a.__contains__('toto')
>>> yop
> 
>> Not sure what you're trying to achieve,
> 
> Using Python as an algebraic parser for
> symbolic mathematical equation and I need
> that the 'in' operator returns an object based
> on its two arguments.
> 
>> but the semantics of the "in" operator
>> make it return a boolean value.
> 
> That is why I need to overload it.
> 
>> The string "yop" evaluates to the boolean
>> value True, as it is not empty.
> 
> Does it means that when overloading an operator, python just
> wrap the call to the method and keep control of the returned
> values ??? Is there a way to bypass this wrapping ???
> 
Certain aspects of the interpreter's behavior have ot be hard-wired in 
order for it to accomplish anything. This is one of the hard-wried 
aspects, so unless you want to change the interpreter's implementation 
I'm afraid you can't change it.

regards
  Steve

-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From BjornSteinarFjeldPettersen at gmail.com  Thu Sep 20 02:45:45 2007
From: BjornSteinarFjeldPettersen at gmail.com (thebjorn)
Date: Thu, 20 Sep 2007 06:45:45 -0000
Subject: Sets in Python
In-Reply-To: <13f3m15igkstq2e@corp.supernews.com>
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
	<CeB*qHeVr@news.chiark.greenend.org.uk>
	<1190235483.412972.81280@v23g2000prn.googlegroups.com>
	<13f3m15igkstq2e@corp.supernews.com>
Message-ID: <1190270745.905604.52480@w3g2000hsg.googlegroups.com>

On Sep 20, 4:17 am, Steven D'Aprano <st... at REMOVE-THIS-
cybersource.com.au> wrote:
[...]
> Data structures don't have problems. Programmers do.

That's QOTW material :-)

> ... And language
> designers with sense build languages that minimize the programmers
> problems, not maximize them.
>
...
>
> The choices for the language designer are:
>
> (1) Invent some sort of magical non-deterministic hash function which
> always does the Right Thing.
>
> (2) Allow the hash of mutable objects to change, which means you can use
> mutable objects as keys in dicts but if you change them, you can no
> longer find them in the dict. They'll still be there, using up memory,
> but you can't get to them.
>
> (3) Simply disallow mutable objects as keys.

(4) Allow mutable objects as keys, but have undefined (implementation
defined) behavior if keys are mutated.

This would seem a natural extension of the "we're all adults" paradigm
(if I name a variable _foo you should treat it as private).
Unfortunately there is no visual cue in this case, and tracking down
where you relied on undefined behavior is notoriously time-consuming
(just ask your nearest C++ multiplatform programmer).

> Alternative 3 is easy to deal with: simply don't use mutable objects as
> keys. That's what Python does. Sure, the programmer sometimes needs to
> work around the lack (convert the list into a tuple, or a string, or
> pickle it, whatever...) which on rare occasions is hard to do, but at
> least there are no mysterious, hard to track down bugs.

Amen.

-- bjorn



From steve at holdenweb.com  Thu Sep 27 08:16:59 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 27 Sep 2007 08:16:59 -0400
Subject: comparing elements of a list with a string
In-Reply-To: <1190889848.653434.178450@g4g2000hsf.googlegroups.com>
References: <1190734785.439839.303030@50g2000hsm.googlegroups.com>	<XLSdnddmo6KUq2TbnZ2dnUVZ_vShnZ2d@comcast.com>	<mailman.1057.1190742568.2658.python-list@python.org>
	<1190889848.653434.178450@g4g2000hsf.googlegroups.com>
Message-ID: <fdg6vr$nj2$1@sea.gmane.org>

Shriphani wrote:
> Hello,
> Would that mean that if I wanted to append all the (date, time) tuples
> to a list, I should do something like:
> 
> for file in list_of_backup_files:
>     some_list.append(file)

That would be one way to do it (assuming you started with some_list as 
an empty list). But a faster way would be to use a list comprehension 
and say

some_list = [f for f in list_of_backup_files]

> By the way I did this:
> 
> def listAllbackups(filename):
> 	list_of_backups = glob(home+'/Desktop/backupdir/*%s*'%filename)
> 	for element in list_of_back:
> 		if element.find(file) != -1:
> 			date_components = element.split('-')[-4:-1]
> 			date = str(date_components[0]) + ":" + str(date_components[1]) +
> ":" + str(date_components[2])
> 			time = element.split('-')[-1]
> 			yield (date, time)
> print listAllbackups('fstab')
> 
> 
> I ran it in the terminal and I got:
> 
> <generator object at 0x81ed58c>
> 
> Why does it do that and not just print out all the values of (date,
> time)

Because the generator object returned by the function has to be used in 
an iterative context to produce its values. Which is why the list 
comprehension produces a list!

If you don't really want a generator then you could just rewrite the 
function to return a list in the first place. You did specifically ask 
"how do I use the yield statement ...". If you are going to iterate o 
ver the list then a generator is typically more memory-efficient 
(because it only produces one element at a time), and can do things that 
a list can't (like deal with a potentially infinite sequence of results).

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From thijs.braem at gmail.com  Sun Sep 16 13:11:33 2007
From: thijs.braem at gmail.com (thijs.braem at gmail.com)
Date: Sun, 16 Sep 2007 17:11:33 -0000
Subject: Python Unicode to String conversion
In-Reply-To: <1188631034.968347.116170@d55g2000hsg.googlegroups.com>
References: <1188600916.528901.189680@d55g2000hsg.googlegroups.com>
	<1188631034.968347.116170@d55g2000hsg.googlegroups.com>
Message-ID: <1189962693.168033.258520@d55g2000hsg.googlegroups.com>

Sorry for answering so late. Thanks a million! This code snippet
helped me solve the problem.

I think I will be using SQLAlchemy for these sorts of things from now
on though, it seems to be taking care of these things itself, on top
of being one hell of a handy ORM of course :)

thijs

On 1 sep, 09:17, iapain <iap... at gmail.com> wrote:
> First make sure your DB encoding is UTF-8 not the latin1
>
> > The error I keep having is something like this:
> > ERREUR:  S?quence d'octets invalide pour le codage ?UTF8? : 0xe02063
>
> then try this:
>
> def smart_str(s, encoding='utf-8', errors='strict'):
>     """
>     Returns a bytestring version of 's', encoded as specified in
> 'encoding'.
>     """
>     if not isinstance(s, basestring):
>         try:
>             return str(s)
>         except UnicodeEncodeError:
>             return unicode(s).encode(encoding, errors)
>     elif isinstance(s, unicode):
>         return s.encode(encoding, errors)
>     elif s and encoding != 'utf-8':
>         return s.decode('utf-8', errors).encode(encoding, errors)
>     else:
>         return s




From steve at holdenweb.com  Wed Sep  5 09:42:58 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 05 Sep 2007 06:42:58 -0700
Subject: handling modules in packages
In-Reply-To: <619B716A-C1EB-42DF-9702-E288AD04F613@mac.com>
References: <619B716A-C1EB-42DF-9702-E288AD04F613@mac.com>
Message-ID: <fbmbp3$nm8$1@sea.gmane.org>

Tommy Grav wrote:
> Hi,
> 
>    I am working on a package that contains a number of
> different modules:
> 
>  > ls pyAstro
> __init__.py
> constants.py
> conversion.py
> observation.py
> orbit.py
> transformation.py
> 
> however, I find that several of the modules have the
> same import statements:
> 
> orbit.py:
> 
> import numpy
> import constants
> import conversion
> import observations
> 
> observations.py:
> 
> import numpy
> import constants
> import conversions
> import transformations
> 
> The modules themselves are not overly large, but it bugs
> me to have to import numpy twice (or even more as the
> number of modules grow). Is there a way to import numpy
> once in the package (like in the __init__.py file) such that
> it is accessible to all the modules? Or is the multiple imports
> just something one has to live with?
> 
> Thanks for any help or direction to webpages discussing this
> topic.
> 
> Cheers
>    Tommy
> 
The simplest thing to do would be to have PyAstro.__init__.py import all 
the sub-modules, and define __all__ as the set of names that the package 
should inject into importing modules.

Then you could write (for example)

from PyAstro import numpy, constants, conversion, obsrvations

However if you are simply worried about run-time efficiency then don't 
be: once a module is imported further imports essentially reduce to 
checking that the module is already present in the sys.modules dict, and 
so take almost no time at all.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From raychorn at hotmail.com  Thu Sep 20 17:59:48 2007
From: raychorn at hotmail.com (Python Maniac)
Date: Thu, 20 Sep 2007 14:59:48 -0700
Subject: I could use some help making this Python code run faster using only
	Python code.
Message-ID: <1190325588.608625.259800@q3g2000prf.googlegroups.com>

I am new to Python however I would like some feedback from those who
know more about Python than I do at this time.

def scrambleLine(line):
    s = ''
    for c in line:
        s += chr(ord(c) | 0x80)
    return s

def descrambleLine(line):
    s = ''
    for c in line:
        s += chr(ord(c) & 0x7f)
    return s

def scrambleFile(fname,action=1):
    if (path.exists(fname)):
        try:
            f = open(fname, "r")
            toks = fname.split('.')
            while (len(toks) > 2):
                toks.pop()
            fname = '.'.join(toks)
            if (action == 1):
                _fname = fname + '.scrambled'
            elif (action == 0):
                _fname = fname + '.descrambled'
            if (path.exists(_fname)):
                os.remove(_fname)
            ff = open(_fname, "w+")
            if (action == 1):
                for l in f:
                    ff.write(scrambleLine(l))
            elif (action == 0):
                for l in f:
                    ff.write(descrambleLine(l))
        except Exception, details:
            print 'ERROR :: (%s)' % details
        finally:
            f.close()
            ff.close()
    else:
        print 'WARNING :: Missing file "%s" - cannot continue.' % fname



From sajmikins at gmail.com  Wed Sep 26 17:02:49 2007
From: sajmikins at gmail.com (Simon Forman)
Date: Wed, 26 Sep 2007 17:02:49 -0400
Subject: Matplotlib TkAgg WindowsXP ImportError
In-Reply-To: <1190827160.282738.293770@k79g2000hse.googlegroups.com>
References: <1190827160.282738.293770@k79g2000hse.googlegroups.com>
Message-ID: <50f98a4c0709261402j34c4ecbev327429c2b65c304f@mail.gmail.com>

On 9/26/07, Simon Forman <sajmikins at gmail.com> wrote:
> Hello,
>
> I just installed Matplotlib (and NumPy) on a windows XP machine, and
> I'm getting the following traceback when I try to use the TkAgg
> backend.
>
> Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit
> (Intel)] on
> win32
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import matplotlib
> >>> matplotlib.use('TkAgg')
> >>> from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
> Traceback (most recent call last):
>  File "<stdin>", line 1, in <module>
>  File "C:\Python25\Lib\site-packages\matplotlib\backends
> \backend_tkagg.py",
> line 8, in <module>
>    import tkagg                 # Paint image to Tk photo blitter
> extension
>  File "C:\Python25\lib\site-packages\matplotlib\backends\tkagg.py",
> line 1, in <module>
>    import _tkagg
> ImportError: DLL load failed: The specified module could not be found.
> >>>
>
> I found one old (2004) post
> http://mail.python.org/pipermail/python-list/2004-April/258963.html
> that seems to indicate that some sort version mismatch of the Tk/Tcl
> libraries may be to blame.  But I don't know how to diagnose that or
> what to do about it.
>
> FWIW, I installed using matplotlib-0.90.1.win32-py2.5.exe and
> numpy-1.0.3.1.win32-py2.5.exe.
>
> Thanks in advance for any help.
> Sincerely,
> ~Simon
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>

Please disregard.  I was missing MSVCP71.dll.

Sorry for the 'noise',
Sincerely,
~Simon


From gagsl-py2 at yahoo.com.ar  Fri Sep  7 21:25:39 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 07 Sep 2007 22:25:39 -0300
Subject: Best way to do attribute docstrings?
References: <1189195567.238990.54440@57g2000hsv.googlegroups.com>
Message-ID: <op.tya981g5x6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 07 Sep 2007 17:06:07 -0300, Ken Kuhlman <kskuhlman at gmail.com>  
escribi?:

> What's the best method for annotating attributes with a docstring?
> I'm looking to be able to introspect my class & get the comments back
> out.

I don't know which is the *best* method. Perhaps you might use properties  
instead. Or some kind of convention, like
	four_legs__doc__ = "Animal has four legs"
to be the docstring associate to `four_legs` attribute.

> The technique I'm using is a little hoaky, but works.. basically I
> create subclasses of the builtin types that I want to be able to use &
> then instantiate them in my attribute assignments.   This gives me an
> object that I can tweak the __doc__ attribute on.   An example of what
> my code looks like is included below.

I don't like subclassing builtins, it doesn't work in general. _("Hello")  
+ _(" world!") is a plain str object, not your derived class.
What about instance attributes? All your examples show class attributes.  
Your docstring appears to be attached to the attribute "value", but it  
should be attached to the attribute definition, or be a class attribute,  
or something like that, shared between all instances and somewhat  
permanent. Else, reassigning the attribute will lose the docstring.

> # Boolean gave me extra fits that I don't understand, but this
> technique works
> class MyBool(int):
>     def __str__(self):
>         return `self.__int__() > 0`
>     def __repr__(self):
>         return self.__str__()

Let Python do the boolean conversion: -1 is a true value, but MyBool(-1)  
would say False.
I don't understand exactly why do you want this class, but I'd write it  
this way:

class MyBool(int):
     def __str__(self):
         return str(bool(self))
     __repr__ = __str__

> def bool_func(val):
>     def blah():
>        return MyBool(val)
>     return blah
> true = bool_func(True)
> false = bool_func(False)

And why do you need such functions?

-- 
Gabriel Genellina



From nutsbreaker3 at gmail.com  Wed Sep 12 16:17:30 2007
From: nutsbreaker3 at gmail.com (nutsbreaker3 at gmail.com)
Date: Wed, 12 Sep 2007 20:17:30 -0000
Subject: Free guitars
Message-ID: <1189628250.389879.213120@50g2000hsm.googlegroups.com>

Win a free guitar today!!!!

http://freeguitars.blogspot.com/



From tec at knology.net  Tue Sep 11 10:21:23 2007
From: tec at knology.net (Tim)
Date: Tue, 11 Sep 2007 07:21:23 -0700
Subject: shared memory pointer
In-Reply-To: <mailman.384.1189515477.2658.python-list@python.org>
References: <1189436265.841415.234050@w3g2000hsg.googlegroups.com>
	<mailman.325.1189437043.2658.python-list@python.org>
	<1189437684.476993.130390@g4g2000hsf.googlegroups.com>
	<mailman.384.1189515477.2658.python-list@python.org>
Message-ID: <1189520483.489744.106960@19g2000hsx.googlegroups.com>

Wow....You put some detail in this response. Thanks so much!

I think I want to stay away from mmap because it uses the disk to
store my memory. I am trying to stay away from that. I am building
strip charts in this python project to view my data. Currently, I am
using a file and I have to open the file when my simulation is
complete. The simulation takes too long to execute when it has to dump
all of the data to a file. The simulation is written in C++ but I want
the strip charts to be written in python so I can using the free plots
in matplotlib. I am trying to place the very large data block in
shared memory so I don't have to wait for the data to be written to a
disk.

I have about 200 shared memory segments that the simulation creates. I
did not know that my code would write to the hard drive because I use
ctypes. Could you explain that. Even if I use mmap, how could I mmap
200 shared memory segments? The first argument to mmap is a zero. How
does mmap know to map the returned object from MapViewOfFile to the
tag?

I have been looking into using a dll to do all of the mappings. Then,
I can call the dll from my python script to access my array of floats.
What do you think of this approach? I am having trouble finding good
documentation of this approach. Can you help?


Thanks


On Sep 11, 7:58 am, Tim Golden <m... at timgolden.me.uk> wrote:
> Tim wrote:
> > I saw the mmap function in the shared memory example. I had some
> > concern with my large memory size being written to the disk drive. I
> > though it might slow down my application. The reason I am writting
> > this new code is because the existing method using a file. I thought
> > shared memory would be much faster.
>
> > I have tried using the memcpy and addresses, casting, etc. Is there a
> > way to use memcpy with the pData returned by MapViewOfFile()?
>
> Tim, let's try to back up on this a moment. As I understand, you're
> running under Windows and you want to use shared memory, presumably
> between two processes. You know about the CreateFileMapping/MapViewOfFile
> API, possibly from this example on MSDN [1] and you want to use that
> technique in Windows *without* an explicit file backing.
>
> Am I right so far?
>
> I suggested the mmap module, and you seemed to pick up on it
> and be trying to use both your ctypes solution *and* the mmap
> module as two halves of the same mechanism. Maybe I misunderstood,
> but that's what it looked like.
>
> Then you asked a question about getting hold of a Python object's
> memory address to be able to pass it into your ctypes solution.
> (Which makes sense, given the nature of that solution).
>
> What you seem to have missed is that your ctypes code is doing
> *exactly* what the mmapmodule.c code (which is the implementation
> of the mmap module) is doing for you behind the scenes.
>
> Here's your code (very slightly reformatted):
>
> <code>
> szName = c_char_p(name)
> hMapObject = windll.kernel32.CreateFileMappingA(
>    INVALID_HANDLE_VALUE,
>    None,
>    PAGE_READONLY,
>    0,
>    TABLE_SHMEMSIZE,
>    szName
> )
> if (hMapObject == 0):
>    print "OpenKey: Could not open name file mapping object"
>    raise WinError()
>
> self.pData = windll.kernel32.MapViewOfFile(
>    hMapObject,
>    FILE_MAP_ALL_ACCESS,
>    0,
>    0,
>    TABLE_SHMEMSIZE
> )
>
> </code>
>
> and here's the code from mmapmodule.c (also reformatted
> and snipped about):
>
> <code>
> m_obj->map_handle = CreateFileMapping(
>    m_obj->file_handle,
>    NULL,
>    flProtect,
>    size_hi,
>    size_lo,
>    m_obj->tagname
> );
> if (m_obj->map_handle != NULL) {
>    m_obj->data = (char *) MapViewOfFile(
>      m_obj->map_handle,
>      dwDesiredAccess,
>      0,
>      0,
>      0
> );
>
> </code>
>
> I hope you can see that they're basically doing the same
> thing. (given the appropriate parameters). The only
> clear difference is that the final param to MapViewOfFile
> is 0 in the Python code, which the MSDN docs[2] indicate
> "If this parameter is 0 (zero), the mapping extends
> from the specified offset to the end of the file mapping."
> It's not clear from that how it applies to a non-file-backed
> FileMapping, but I *assume* that the Python devs have tested
> that out.
>
> In short, to have two Python processes talk via shared
> memory (not linking to a specific file) the following
> works for me:
>
> <code-a>
> import mmap
>
> #
> # The 0 special file value can be -1 in Python 2.5
> #
> shmem = mmap.mmap (0, 1000, "TJG", mmap.ACCESS_WRITE)
> shmem.write ("blah blah")
> </code-a>
>
> <code-b>
> import mmap
>
> shmem = mmap.mmap (0, 1000, "TJG", mmap.ACCESS_WRITE)
> print shmem.read (9)
> </code>
>
> Obviously, I've used dummy codes and values, but since
> the .write and .read (and the other helper methods)
> use strings, you can always pickle or marshal arbitrary
> Python data to move it around.
>
> I hope all that's helpful; if nothing else, it's given
> me some exercise in reading the code of the stdlib, which
> can't be bad!
>
> TJG
>
> [1]http://msdn2.microsoft.com/en-us/library/aa366551.aspx
> [2]http://msdn2.microsoft.com/en-us/library/aa366761.aspx




From steve at REMOVE-THIS-cybersource.com.au  Fri Sep  7 20:32:35 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sat, 08 Sep 2007 00:32:35 -0000
Subject: unexpected behavior: did i create a pointer?
References: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>
	<46e11dfe$0$4517$9b4e6d93@newsspool3.arcor-online.net>
	<pan.2007.09.07.10.40.46@REMOVE.THIS.cybersource.com.au>
	<46e15959$0$16104$9b4e6d93@newsspool1.arcor-online.net>
Message-ID: <13e3rd38ijilebd@corp.supernews.com>

On Fri, 07 Sep 2007 15:59:53 +0200, Wildemar Wildenburger wrote:

> I just thought I'd go along with the analogy the OP created as that was
> his mindset and it would make things easier to follow if I didn't try to
> forcibly change that.

My reaction to somebody trying to reason with the wrong analogy is to 
teach them the right analogy, not to tell them they got it right when 
they actually got it wrong.

"My car won't start -- I must not have stirred the gasoline enough before 
baking it."

"Yes, that's right. It's very important to stir the gasoline fully so 
that all the ingredients are fully mixed."


-- 
Steven.



From hrishys at yahoo.co.uk  Wed Sep 26 04:34:43 2007
From: hrishys at yahoo.co.uk (hrishy)
Date: Wed, 26 Sep 2007 09:34:43 +0100 (BST)
Subject: Hello Gabriel cant help noticing you
In-Reply-To: <op.ty83feodx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <338550.18683.qm@web27805.mail.ukl.yahoo.com>

Hi Gabriel

Well it could be a bad example when we need to do lot
more things via xml but..the regex in that i have
preserved it carefully thats key takeawy for a
beginner like me the way the problem was dissected to
arrive at what was needed

regards
Hrishy


--- Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:

> En Wed, 26 Sep 2007 03:35:25 -0300, hrishy
> <hrishys at yahoo.co.uk> escribi???:
> 
> > I couldnt help but to write this mail.
> >
> > I am not a python programmer just a shell script
> coder
> > and i am planning to learn some decent python and
> > raise my level from a shell script junkie to a
> Python
> > gentleman the way you explain things and show it
> in
> > code is simply amazing.
> 
> Thanks! I feel somewhat embarrassed now :">
> Glad to see you find my posts useful.
> 
> > I particularly liked the way you explained that
> > Regular expression stuff to parse that XML i am
> just
> > awestruck.
> 
> Thanks again! But parsing XML is not a good example
> of RE usage, so I  
> don't like it so much.
> 
> -- 
> Gabriel Genellina
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list



      ___________________________________________________________ 
Want ideas for reducing your carbon footprint? Visit Yahoo! For Good  http://uk.promotions.yahoo.com/forgood/environment.html


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Sep 21 05:05:45 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 21 Sep 2007 11:05:45 +0200
Subject: executing list of methods (and collecting results)
References: <mailman.839.1190329275.2658.python-list@python.org>
	<5lgi6qF81sotU1@mid.individual.net>
	<mailman.845.1190338857.2658.python-list@python.org>
Message-ID: <5lhfr9F87lq0U1@mid.individual.net>

gherzig at fmed.uba.ar wrote:

> Haha, no, the actual methods do other kind of things.
> Thanks Bj?rn!!!

Okay, so I hoped. Glad to be of help.

Regards,


Bj?rn

-- 
BOFH excuse #233:

TCP/IP UDP alarm threshold is set too low.



From bdesth.quelquechose at free.quelquepart.fr  Sun Sep  9 11:15:50 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 09 Sep 2007 17:15:50 +0200
Subject: Difference between two times (working ugly code, needs polish)
In-Reply-To: <mailman.405.1189543618.2658.python-list@python.org>
References: <mailman.405.1189543618.2658.python-list@python.org>
Message-ID: <46e703d9$0$3290$426a74cc@news.free.fr>

Shawn Milochik a ?crit :
> I have done what I wanted, but I think there must be a much better way.
> 
> Given two timestamps in the following format, I just want to figure
> out how far apart they are (in days, seconds, whatever).
> 
> Format:
> 
> YYYY-MM-DD_MM:SS
> 
> Example:
> 2007-09-11_16:41
> 
> 
> It seems to me that to do what I want, I need to convert a string into
> a number (time.mktime()), such as this: 1189543487.0
> 
> Once I have that, I can just subtract one from the other and do
> whatever I want. The ugly part is converting something like
> 2007-09-11_16:41 to the numeric equivalent.
 >
> Below is my code. Any suggestions?

import time
print time.mktime(time.strptime("2007-09-11_16:41", '%Y-%m-%d_%H:%M'))
=> 1189521660.0

FWIW, you may also want to have a look at the datetime module, with 
special attention to the timedelta class.

HTH


From aleax at mac.com  Sun Sep  9 11:49:42 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 9 Sep 2007 08:49:42 -0700
Subject: unexpected behavior: did i create a pointer?
References: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>
	<46e11dfe$0$4517$9b4e6d93@newsspool3.arcor-online.net>
	<pan.2007.09.07.10.40.46@REMOVE.THIS.cybersource.com.au>
	<fbrdsm$5f3$01$1@news.t-online.com>
	<13e2jdobu2kqkf1@corp.supernews.com>
	<fbtl7i$um3$02$2@news.t-online.com>
	<13e4rno5qal6h4b@corp.supernews.com>
	<1189330200.935267.107970@19g2000hsx.googlegroups.com>
	<13e7rhtqelbcb54@corp.supernews.com>
	<1189346979.198156.115170@g4g2000hsf.googlegroups.com>
Message-ID: <1i4602f.1n7xwdh14c2r18N%aleax@mac.com>

Arnaud Delobelle <arnodel at googlemail.com> wrote:
   ...
> > >>> def lower_list(L):
> >
> > ...     for i, x in enumerate(L):
> > ...         L[i] = x.lower()
> > ...>>> s = ['STRING']
> > >>> lower_list(s)
> > >>> print s == ['string']
> > True
> >
> > >>> def lower_string(s):
> >
> > ...     s = s.lower()
> > ...>>> s = "STRING"
> > >>> lower_string(s)
> 
> Let's see what happens here:  when lower_string(s) is called, the 's'
> which is local to lower_string is made to point to the same object as
> the global s (i.e. the string object with value "STRING").  In the
> body of the function, the statement s=s.lower() makes the local 's'
> point to a new string object returned s.lower().  Of course this has
> not effect on what object the global 's' points to.

Yep, the analogy with C pointers would work fine here:

void lower_string(char* s) {
    s = <whatever>
}

would fail to have the intended effect in C just as its equivalent does
in Python (in both Python and C, rebinding the local name s has no
effect on the caller of lower_string).  Add an indirection:

void lower_list(item* L) {
   ...
   L[i] = <something>
}

this indirection (via indexing) *does* modify the memory area (visible
by the caller) to which L points.

The difference between "name=something" and "name[i]=something" is so
*HUGE* in C (and in Python) that anybody who doesn't grok that
difference just doesn't know or understand any C (nor any Python).


> What I think is a more dangerous misconception is to think that the
> assignement operator (=) has the same meaning in C and python.

I've seen the prevalence of that particular misconception drop
dramatically over the years, as a growing fraction of the people who
come to Python after some previous programming experience become more
and more likely to have been exposed to *Java*, where assignment
semantics are very close to Python (despite Java's unfortunate
complication with "unboxed" elementary scalar types, in practice a vast
majority of occurrences of "a=b" in Java have just the same semantics as
they do in Python); teaching Python semantics to people with Java
exposure is trivially easy (moving from "ALMOST every variable is an
implicit reference -- excepting int and float ones" to "EVERY variable
is an implicit reference"...).


Alex
 


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Sep 10 07:46:39 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 10 Sep 2007 13:46:39 +0200
Subject: Python syntax wart
References: <fbvvil$7dj$1@lust.ihug.co.nz> <5khuq4F3ij9eU1@mid.individual.net>
	<fc2bvf$i1l$2@lust.ihug.co.nz>
Message-ID: <5kkp4vF46jjuU3@mid.individual.net>

Lawrence D'Oliveiro wrote:
> In message <5khuq4F3ij9eU1 at mid.individual.net>, Bjoern
 
>> What's wrong with this:
>> 
>> for Link in GetEachRecord(
> 
> Then you're no longer showing the syntax structure in two
> dimensions.

Why should I want to? :)

BTW, this is the first time I read about "two dimensional syntax".
What's the benefit?

Regards,


Bj?rn

-- 
BOFH excuse #292:

We ran out of dial tone and we're and waiting for the phone company
to deliver another bottle.



From wink at saville.com  Wed Sep 26 07:47:32 2007
From: wink at saville.com (wink)
Date: Wed, 26 Sep 2007 11:47:32 -0000
Subject: Asynchronous Messaging
Message-ID: <1190807252.731074.141450@k79g2000hse.googlegroups.com>

Hello,

I'm getting my feet wet in Python and thought I'd try to see how well
Python works for asynchronous messaging. I've been using asynchronous
messaging for 5 years and find it advantageous for many things. In the
scheme I use communication is not only asynchronous but it is also non-
blocking and inherently serialized via a queue.

This provides two benefits, a sender is never directly effected by the
receiver and since the receiver handles only one message at a time
it generally never has to use mutexes or semaphores. This allows for
the
programmer to use multiple threads without having to contend with the
associated issues mutexes have in the area of deadly embraces or race
conditions.

Anyway, below is a link to the first pass at an implementation
in Python, comments are welcome:

http://www.saville.com/python/mproc.tgz

Regards,

Wink Saville



From fabiofz at gmail.com  Mon Sep 10 07:32:48 2007
From: fabiofz at gmail.com (Fabio Zadrozny)
Date: Mon, 10 Sep 2007 08:32:48 -0300
Subject: Pydev 1.3.9 Released
Message-ID: <cfb578b20709100432o6a79f7c2gdbaebeb0f216e324@mail.gmail.com>

Hi All,

Pydev and Pydev Extensions 1.3.9 have been released

Details on Pydev Extensions: http://www.fabioz.com/pydev
Details on Pydev: http://pydev.sf.net
Details on its development: http://pydev.blogspot.com

Release Highlights in Pydev Extensions:
-----------------------------------------------------------------

* Code-analysis: detects bad indentation (wrong number of indent chars).
* Code-analysis: Class may be marked with '@DynamicAttrs' so that the
code-analysis doesn't give undefined variable errors. See
http://www.fabioz.com/pydev/manual_adv_code_analysis.html#Passing_info_to_code_analysisfor
more details.
* Mark-Occurrences: Fix: a class that had a call would not be recognized
sometimes.
* Rename Refactoring: Fix: when different heuristics yielded the same result
the text could become garbled.


Release Highlights in Pydev:
----------------------------------------------

* Fixed problem when configuring jython
* Patch from paulj: debbugger working with jython 2.2rc2
* Patch from Oskar Heck: debbugger can change globals
* Added action to delete all .pyc / $py.class files
* Added actions to add/remove the pydev configuration from a project
(previously, the only way to add a nature was to open a python file within a
project).
* Ctrl+Shift+O: When used with a selection will consider lines ending with \
(without selection organizes imports)
* Auto-add "import" string will not be added when adding a space in the
case: from xxximport (just after from xxx)
* Templates created with tabs (or spaces indent) are now converted to the
indent being used in the editor
* Hide non-pydev projects filter working
* Don't show assignments/imports after if __name__ == '__main__': in outline
* Code-completion: after a completion is requested, pressing '.' will apply
that completion (and if it has parameters, they'll not be added).
* Code-completion: when a code-completion is applied with Ctrl pressed
(toggle mode), parameters are not added.
* Assign to local variable/attribute handles constants correctly.
* psyco changed for Null object for debug (so, no changes are required to
the code if psyco is used while debugging).
* Code-folding annotations won't change places.
* Pydev package explorer will correctly show outline for files if the
project root is set as a source folder.
* Pydev package explorer: folders under the pythonpath have a package icon.
* Unittest runner: handles multiple selection.


What is PyDev?
---------------------------

PyDev is a plugin that enables users to use Eclipse for Python and Jython
development -- making Eclipse a first class Python IDE -- It comes with many
goodies such as code completion, syntax highlighting, syntax analysis,
refactor, debug and many others.


Cheers,

-- 
Fabio Zadrozny
------------------------------------------------------
Software Developer

ESSS - Engineering Simulation and Scientific Software
http://www.esss.com.br

Pydev Extensions
http://www.fabioz.com/pydev

Pydev - Python Development Enviroment for Eclipse
http://pydev.sf.net
http://pydev.blogspot.com
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From horpner at yahoo.com  Wed Sep 12 12:58:16 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Wed, 12 Sep 2007 16:58:16 GMT
Subject: newbie: self.member syntax seems /really/ annoying
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189604018.520338.162520@57g2000hsv.googlegroups.com>
	<46e7f450$0$12305$426a74cc@news.free.fr>
	<1189608231.151112.147550@y42g2000hsy.googlegroups.com>
	<1189609935.347945.139000@19g2000hsx.googlegroups.com>
Message-ID: <slrnfeg3si.21g.horpner@FIAD06.norwich.edu>

On 2007-09-12, Michele Simionato <michele.simionato at gmail.com> wrote:
>> I see the argument for making self explicit -- what would be
>> wrong with just .a instead of self.a though?  That's still
>> explicit but much easier to read.  (I think I've seen that
>> somewhere else, is it C#?)
>
> This has been proposed many times. But self is handy because
> you can give a different name to it: for instance it becomes
> cls when you are inside a classmethod.

The treatment of self in the function's parameter list seems to
be the pitfall of any .member shortcut proposal. Most proposals
don't even address that point.

Does it become:

class Foo:
  def __init__():
    .bar = 40

or

class Foo:
  def __init__(.):
    .bar = 40

or

class Foo:
  def __init__(self):
    .bar = 40

I guess the middle one is the most consistent, but it seems
ugly compared to what we have now.

-- 
Neil Cerutti


From thomas at jollans.com  Fri Sep 21 16:09:28 2007
From: thomas at jollans.com (Thomas Jollans)
Date: Fri, 21 Sep 2007 22:09:28 +0200
Subject: RE Help
In-Reply-To: <1190399985.324448.242610@d55g2000hsg.googlegroups.com>
References: <1190399985.324448.242610@d55g2000hsg.googlegroups.com>
Message-ID: <200709212209.29148.thomas@jollans.com>

On Friday 21 September 2007, byte8bits at gmail.com wrote:
> Not specific to Python, but it will be implemented in it... how do I
> compile a RE to catch everything between two know values? Here's what
> I've tried (but failed) to accomplish... the knowns here are START and
> END:
>
> data = "asdfasgSTARTpruyerfghdfjENDhfawrgbqfgsfgsdfg"
> x = re.compile('START.END', re.DOTALL)
>
> x.findall(data)

I'm not sure finding a variable number of occurences can be done with re. How 
about

# data = the string
strings = []
for s in data.split('START')[1:]:
    strings.append(s.split('END')[0])


From p at ulmcnett.com  Tue Sep  4 18:57:45 2007
From: p at ulmcnett.com (Paul McNett)
Date: Tue, 04 Sep 2007 15:57:45 -0700
Subject: Dealing with PayPal's messy SPF records
Message-ID: <46DDE2E9.70901@ulmcnett.com>

I administer email for a few clients of mine, using Postfix. One of the 
policies that is in place is SPF-checking, and rejecting messages 
accordingly. This has been working well for months.

However, today a user called me to complain that they weren't able to 
get confirmed with PayPal to set up a new account. Turns out, SPF was 
rejecting the email from PayPal because of "Too many DNS lookups". This 
was somewhat surprising as I had been expecting the problem to be with 
my greylisting setup.

I took a look at PayPal's SPF structure and it is indeed a big mess - 
lots of includes, and those includes have lots of hosts and mx records, 
etc.

I helped the user by temporarily disabling all SPF checking and then 
reenabling it after the user got confirmed, but I was wondering if there 
is an elegant way to tell postfix to "ignore the going over MAX_LOOKUPS" 
for ("paypal.com",). I guess this would involve modifying policyd-spf.py?

I took a look at the source spf.py, and see where these values are 
hardcoded, complete with references to the RFC, and I don't want to 
modify those hardcoded values. I also don't want to disable SPF as the 
final layer of policy checking on my mail server. But, I have to 
recognize that companies like PayPal are big players, and I'm probably 
not going to get them to budge by complaining, so I should try to 
accommodate their messy setups as much as possible, as my users are 
nearly always right.

Anyone been down this road before and can offer tips/advice? I did 
google for relevant strings, but didn't come up with anything that 
appeared to address this specific problem.


-- 
pkm ~ http://paulmcnett.com


From bignose+hates-spam at benfinney.id.au  Tue Sep 18 19:22:20 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 19 Sep 2007 09:22:20 +1000
Subject: Using pseudonyms
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46ef893c$0$21882$426a34cc@news.free.fr>
	<fcop08$2ue$1@panix3.panix.com>
	<mailman.726.1190130940.2658.python-list@python.org>
	<fcot65$1us$1@panix3.panix.com>
	<46effd63$0$16044$426a74cc@news.free.fr>
Message-ID: <87odfzy2xf.fsf@benfinney.id.au>

Bruno Desthuilliers <bruno.42.desthuilliers at wtf.websiteburo.oops.com> writes:

> For the record, I usually don't give a damn about what
> name/nickname/whatever peoples use.

With the caveat "... so long as they consistently use one name in a
given context", I concur.

-- 
 \        "I saw a sign: 'Rest Area 25 Miles'. That's pretty big. Some |
  `\                   people must be really tired."  -- Steven Wright |
_o__)                                                                  |
Ben Finney


From kar1107 at gmail.com  Mon Sep 24 18:34:44 2007
From: kar1107 at gmail.com (Karthik Gurusamy)
Date: Mon, 24 Sep 2007 22:34:44 -0000
Subject: shutil.copy2 error
In-Reply-To: <1190644477.380312.261840@d55g2000hsg.googlegroups.com>
References: <1190644477.380312.261840@d55g2000hsg.googlegroups.com>
Message-ID: <1190673284.509807.110830@57g2000hsv.googlegroups.com>

On Sep 24, 7:34 am, Horse <jbutu... at gmail.com> wrote:
> I've written a python script that copies a nightly Oracle backup file
> to another server.  Every couple days, the script fails with this
> error message:
>
> Error copying Q:/Oradata/GISPROD/Backups/3UISN35R_1_1 to s:/gisprod/
> backups/3UISN35R_1_1
> [Errno 22] Invalid argument
>
> Here's the code for the function I'm running.  The path names are all
> correct, and it works *most of the time*.  It only fails about once or
> twice a week.  Anyone know where I can get more info on this "errno 22
> invalid argument"?
>
> def CopyNewFiles(SOURCE_DIR, DEST_DIR):
>     global STATUS
>     try:
>         os.chdir(SOURCE_DIR)
>         for x in os.listdir(SOURCE_DIR):
>             int_time = os.stat(x)[stat.ST_CTIME]
>             str_time = time.ctime(int_time)
>             if datetime.date.fromtimestamp(int_time + 0.00) >
> YESTERDAY:
>                 try:
>                     DEST_FILE = os.path.join(DEST_DIR, x)
>                     logfile.write("     Copying " + SOURCE_DIR + x + "
> to " + DEST_FILE + "\n")
>                     logfile.flush()
>                     if not os.path.isfile(DEST_FILE):
>                         shutil.copy2(x, DEST_FILE)

I'm not sure of the error; but one possibility is that the source-
directory contents may be modified by some other process, while you
are looping here copying one-by-one the files.

So a file 'x' could be present at the time you enter loop, but gone by
the time you try the shutil.copy2. Again this is just a guess...

Yet another possibility is 'x' is not a regular file (say in unix it
could be a named pipe).. you can try adding a check for x (like
os.path.isfile(x)) and copy only regular files.

Karthik

>                     else:
>                         logfile.write("        File exists.  Skipping.
> \n")
>                         logfile.flush()
>                 except (IOError, os.error), why:
>                     logfile.write("\n\nError copying " + SOURCE_DIR +
> x + " to " + DEST_FILE + "\n\n")
>                     logfile.write("\n" + str(why) + "\n")
>                     logfile.flush()
>                     STATUS = "FAILED"
>     except:
>         logfile.write("\n\nUnhandled error in CopyNewFiles\n\n")
>         logfile.write("SOURCE_DIR = " + SOURCE_DIR + "\n")
>         logfile.write("DEST_DIR = " + DEST_DIR + "\n")
>         logfile.flush()
>         STATUS = "FAILED"




From bignose+hates-spam at benfinney.id.au  Fri Sep 28 02:58:23 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 28 Sep 2007 16:58:23 +1000
Subject: Numeric command-line options vs. negative-number arguments
References: <1190913250.198794.269530@k79g2000hse.googlegroups.com>
	<fdgpic$ssu$00$1@news.t-online.com>
	<0a6dnQmBPIzuqmHbnZ2dnUVZ_vihnZ2d@comcast.com>
	<87ejgj4lpy.fsf_-_@benfinney.id.au>
	<X5adnVivJZ2wGWHbnZ2dnUVZ_tyknZ2d@comcast.com>
Message-ID: <87wsub2s4w.fsf@benfinney.id.au>

Steven Bethard <steven.bethard at gmail.com> writes:

> Did you try it and find it didn't work as you expected?

No, I was commenting on the behaviour you described (hence why I said
"That would be irritating").

> Argparse knows what your option flags look like, so if you specify
> one, it knows it's an option.  Argparse will only interpret it as a
> negative number if you specify a negative number that doesn't match
> a known option.

That's also irritating, and violates the expected behaviour. It leads
to *some* undefined options being flagged as errors, and others
interpreted as arguments. The user shouldn't need to know the complete
set of options to know which leading-hyphen arguments will be treated
as options and which ones won't.

The correct behaviour would be to *always* interpret an argument that
has a leading hyphen as an option (unless it follows an explicit '--'
option), and complain if the option is unknown.

-- 
 \     "When I was a kid I used to pray every night for a new bicycle. |
  `\    Then I realised that the Lord doesn't work that way so I stole |
_o__)                one and asked Him to forgive me."  -- Emo Philips |
Ben Finney


From zzbbaadd at aol.com  Fri Sep 28 15:29:14 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Fri, 28 Sep 2007 12:29:14 -0700
Subject: Python 3.0 migration plans?
In-Reply-To: <5m51l4Fbao07U2@mid.uni-berlin.de>
References: <1191002679.569709.16870@22g2000hsm.googlegroups.com>
	<mailman.1242.1191003389.2658.python-list@python.org>
	<1191005906.556751.261940@22g2000hsm.googlegroups.com>
	<5m51l4Fbao07U2@mid.uni-berlin.de>
Message-ID: <1191007754.740566.137510@n39g2000hsh.googlegroups.com>


>
> Or bind resources of these pocket protectors that otherwise would lead to
> answers for people that do seek enlightment...

I don't think it would be correct to characterize my posts as not
seeking enlightenment. I do also happen to voice my opinion which
seems appropriate since this can be characterized as a discussion
group. It theoretically is possible for a discussion group to tolerate
opinions that diverge from the majority.

One issue I have with this group and that I encountered many years ago
in the Perl group is that there is no separate group
comp.lang.python.beginner where you can ask questions without getting
hit with RTFM! and the like.



From deets at nospam.web.de  Fri Sep 28 05:49:58 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 28 Sep 2007 11:49:58 +0200
Subject: Python 3.0 migration plans?
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>
	<87641v4j38.fsf@benfinney.id.au>
	<1190949502.875203.57690@w3g2000hsg.googlegroups.com>
	<5m3p1dFbl98pU1@mid.uni-berlin.de>
	<1190968707.799398.232550@19g2000hsx.googlegroups.com>
Message-ID: <5m4126FbgjabU1@mid.uni-berlin.de>

TheFlyingDutchman wrote:

> 
>>
>> The fact that you compare and criticise the simple annotations like
>> static or abstract with the much more powerful decorator concept shows
>> that, despite being the maintainer of a
>> soon-to-be-ruling-the-python-world Python 3 fork, lack understanding of
>> even the most basic language features. Which isn't exactly news.[1]
> 
> Don't you mean "lack appreciation for the non-basic language
> features"? static, class and abstract
> are basic language features that I appreciate. "decorators" have been
> in Python for only a small part of its existence, they aren't in the
> vast majority of languages (if any other language even has them) which
> means people write all kinds of software without them. Or rather, most
> of the software ever written didn't use decorators. Doesn't sound
> basic at all.

People did write all kinds of software in Assembler. And large portions of
these people complained about every feature that some new language
introduced.

All serious languages are turing-complete. So can we put away with this
non-sense argument right away, please?

>>
>> Maybe you should start using python more and _then_ start discussions
>> about it's features, when you have good grounds and can provide viable
>> alternatives? But I guess that's a wish that won't be granted....
> 
> static and abstract keywords would seem to be very viable
> alternatives. Viable enough that several language designers used them.

As I said - you don't get it. The decorators (in conjunction with the
descriptor protocol - ever heard of that?) are very powerful yet lead as an
artifact to simple, declarative implementations of features you like,
namely static and abstract methods. 

And as you seem being so reluctant to let new features creep into the
language, the introduction of new keywords you like?

Besides, those 'several language designers' seem to think that the
introduction of keywords isn't enough, but a general purpose annotation
scheme seems to be viable - or how do you explain e.g. JDK 1.5 Annotations?

Diez


From steve at holdenweb.com  Mon Sep 17 14:20:10 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 17 Sep 2007 14:20:10 -0400
Subject: Try this
In-Reply-To: <1190051875.433350.150820@50g2000hsm.googlegroups.com>
References: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>	<13eqsdfsfvsa16f@corp.supernews.com>	<1189969529.652871.19280@50g2000hsm.googlegroups.com>	<mailman.621.1189970593.2658.python-list@python.org>	<1189979679.969074.216490@y42g2000hsy.googlegroups.com>	<1189981681.745195.18130@y42g2000hsy.googlegroups.com>	<1189983233.709832.124290@19g2000hsx.googlegroups.com>	<1189984913.956999.163100@n39g2000hsh.googlegroups.com>	<1189990689.259451.232570@g4g2000hsf.googlegroups.com>	<mailman.634.1189996018.2658.python-list@python.org>	<1190008502.986300.286280@22g2000hsm.googlegroups.com>	<mailman.646.1190027387.2658.python-list@python.org>
	<1190051875.433350.150820@50g2000hsm.googlegroups.com>
Message-ID: <46EEC55A.9070602@holdenweb.com>

mensanator at aol.com wrote:
> On Sep 17, 6:09 am, Steve Holden <st... at holdenweb.com> wrote:
>> mensana... at aol.com wrote:
>>> On Sep 16, 9:27?pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
>>> wrote:
>>>> En Sun, 16 Sep 2007 21:58:09 -0300, mensana... at aol.com  
>> [...]
>>>> What about the rest of the world that don't speak
>>>> English or even worse, don't use the Latin alpabet?
>>> When the rest of the world creates the next
>>> generation of computers, THEY can chosse the
>>> defaults.
>> Right, because of course US companies have no desire to do business with
>> the rest of the world.
> 
> I'm merely pointing out that it is the legacy of the history of
> information technology that is chauvinistic. That happens to be
> the way things are, I did not say that's the way they should be.
> 
You imply that's the way they should be by placing pre-conditions on the 
  adoption of anything but ASCII as a default.

>> I'm not given to ad hominem attacks, but this remark really seems to
>> indicate that "chauvinistic cretin" might apply to you.
> 
> _I_ didn't invent ASCII or EBCDIC. Why weren't the European
> and Chinese languages considered when these were developed
> 40-50 years ago? Because they were "chauvinistic cretins"?
> Is that what you think?
> 
No. In those days (sixty years ago) less was possible, and achieving 
anything, however limited, represented progress. Certainly it would have 
been nice to see the adoption of more internationally-applicable 
standards, but the codes that were used in the early computes had their 
roots in even earlier information systems like teletypes and telex 
machines. It was partly a matter of adapting what already existed.

In these more enlightened times we can build systems for larger 
audiences by making them applicable to a wider range of languages and 
character sets. The standards and the technology already exist to do so.

So, "chauvinistic" because you appear to require the users of the 
non-ASCII parts of Unicode to contribute something before they get 
systems that suit their needs, when in fact the boot is on the other 
foot and it behooves the manufacturers to adapt to market needs if they 
want to serve those markets.

"Cretin" (in the sense of possessing sub-normal intelligence, as I do 
not know whether or not you have a thyroid deficiency) because you do 
not seem to be able to think of the needs of the larger community, and 
respond to argument with non-sequitur and evasion.

Plus, you annoyed me. I should have restrained myself. Sorry.

>> You'll be gald
>> to know you are unlikely to hear from me again.
> 
> Why? Because I tend to act as a gadfly? To point out that
> the emperor is, in fact, naked? Because the professional
> programming community doesn't like their dirty laundry
> aired in public?
> 
No, because everything you discuss appears to be discussed in the most 
simplistic terms, with limited perspective. So a discussion with you is 
about as satisfying as a discussion with a twelve year old child.

>> Your perception of the development of information technology is so
>> skewed you would be better off knowing nothing.
> 
> My perception is skewed? Why then, does Unicode even exist?
> 
To meet real needs which you appear to feel shouldn't be met until the 
people with those needs have built their own information technologies 
(or in your words "created the next generation of computers.").

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline


From bscrivener42 at gmail.com  Thu Sep  6 22:58:33 2007
From: bscrivener42 at gmail.com (BartlebyScrivener)
Date: Fri, 07 Sep 2007 02:58:33 -0000
Subject: why should I learn python
In-Reply-To: <1189118200.040934.151520@57g2000hsv.googlegroups.com>
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
	<LC_Di.8274$924.7987@newssvr23.news.prodigy.net>
	<1189117798.506367.278560@y42g2000hsy.googlegroups.com>
	<1189118200.040934.151520@57g2000hsv.googlegroups.com>
Message-ID: <1189133913.480902.289070@57g2000hsv.googlegroups.com>

On Sep 6, 5:36 pm, Andr? <andre.robe... at gmail.com> wrote:

> Easy to read, easy to write, good libraries and, I have found, an
> extremely helpful community.
>
> Hobbyists (like me) can work on projects written in Python on and off
> (sometimes for weeks if not months without programming) and be able to
> resume the work very quickly (because it's so easy to read and
> understand the code).
>

I second these.  I am not a programmer. You can get busy with other
projects for weeks and come back to Python code and pick up where you
left off, because it uses WORDS.  Try remembering what (<>) or <*>
means after being away from Perl for a month.

rd



From siona at chiark.greenend.org.uk  Wed Sep 19 09:16:48 2007
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 19 Sep 2007 14:16:48 +0100 (BST)
Subject: Sets in  Python
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
Message-ID: <CeB*qHeVr@news.chiark.greenend.org.uk>

sapsi  <saptarshi.guha at gmail.com> wrote:
> Why can't lists be hashed?

Several people have answered "because they're mutable" without
explaining why mutability precludes hashing. So:

Consider a dict (dicts have been in Python a *lot* longer than
sets, and have the same restriction) which allowed lists as
keys:

d = {}
k = [1, 2]
d[k] = None

Now, if I were to do:

k.append(3)

what would you expect:

d.keys()

to return? Did d magically rehash k when it was modified? Did d[k]
take a copy of k, and if so, how deep was the copy (consider
d[[1, k]] = None followed by a modification to k)? Leaving the hash
unchanged and relying on collision detection to resolve won't work,
since you may go directly for d[[1, 2, 3]] and not spot that
there's already an entry for it since it's been hashed under [1, 2].

"Practicality beats purity" and the design decision was to simply
sidestep these issues by disallowing mutable dict keys. And as the
set implementation is based on the dict implementation, it applies
to sets to.

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
   "Frankly I have no feelings towards penguins one way or the other"
        -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From http  Sat Sep 22 02:38:38 2007
From: http (Paul Rubin)
Date: 21 Sep 2007 23:38:38 -0700
Subject: Would Anonymous Functions Help in Learning Programming/Python?
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<46f45f02$0$15350$4c368faf@roadrunner.com>
Message-ID: <7xps0bgq6p.fsf@ruckus.brouhaha.com>

Carl Banks <pavlovevidence at gmail.com> writes:
> Especially someone like an 
> engineer (in the classical sense), who isn't building versatile software 
> packages, won't need to resort to functional programming much. 

http://www.math.chalmers.se/~rjmh/Papers/whyfp.html


From fakeaddress at nowhere.org  Tue Sep 11 00:12:20 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Tue, 11 Sep 2007 04:12:20 GMT
Subject: Modul (%) in python not like in C?
In-Reply-To: <13ec37dri08s7a3@corp.supernews.com>
References: <mailman.294.1189364475.2658.python-list@python.org>
	<TM0Fi.4172$FO2.18@newssvr14.news.prodigy.net>
	<13ec37dri08s7a3@corp.supernews.com>
Message-ID: <EAoFi.6785$JD.2181@newssvr21.news.prodigy.net>

Scott David Daniels wrote:
> C, which was designed as a "high level assembly language," does not
> tightly define the results of / and % for negative numbers.  Instead
> it defines the result for positive over positive, and constrains the
> result for the others. 

Not true. Here it is again:

     When integers are divided, the result of the / operator is
     the algebraic quotient with any fractional part discarded.(87)
     If the quotient a/b is representable, the expression
     (a/b)*b + a%b shall equal a.
     [...]
     87) This is often called ??truncation toward zero??.

     [International Standard ISO/IEC 9899:1999, Section 6.5.5
     Multiplicative operators, Paragraph 6 and footnote 87]


-- 
--Bryan


From gagsl-py2 at yahoo.com.ar  Mon Sep  3 03:17:29 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 03 Sep 2007 04:17:29 -0300
Subject: How does super() work?
References: <eb79828c0708311358v388dc622qf781fe6651a7129e@mail.gmail.com>
Message-ID: <op.tx2g7flzx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Fri, 31 Aug 2007 17:58:24 -0300, Lamonte Harris <pyth0nc0d3r at gmail.com>  
escribi?:

> I've searched Google, and other search engines to try to find out how
> super() works.  Can someone explain in short detail how super() works?  I
> may and may not need to know this information, but it is good to know.

See http://www.python.org/download/releases/2.2.3/descrintro/#cooperation

-- 
Gabriel Genellina



From zentraders at gmail.com  Thu Sep  6 19:48:31 2007
From: zentraders at gmail.com (Zentrader)
Date: Thu, 06 Sep 2007 16:48:31 -0700
Subject: Using wild character
In-Reply-To: <5k9pjoF2mrncU1@mid.uni-berlin.de>
References: <1189054805.447871.213150@y42g2000hsy.googlegroups.com>
	<1189058095.671230.262190@o80g2000hse.googlegroups.com>
	<5k9pjoF2mrncU1@mid.uni-berlin.de>
Message-ID: <1189122511.231602.217710@w3g2000hsg.googlegroups.com>

On Sep 6, 12:47 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Wed, 05 Sep 2007 22:54:55 -0700, TheFlyingDutchman wrote:
> > To do a "*string" wildcard filter use the endswith() function instead
> > of startswith() and to do a *string* type wildcard filter use
> > the find() function > -1.
>
> Maybe better the ``in`` operator for the '*string*' type.  `str.find()`
> will go away in the future.
>
> Ciao,
>         Marc 'BlackJack' Rintsch

string.find serves a useful purpose in that it returns the starting
location of the string found, or -1 if not found, so if you wanted to
slice "abdecf" on"c", string.find will tell you where that is.



From bignose+hates-spam at benfinney.id.au  Tue Sep 25 00:41:55 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 25 Sep 2007 14:41:55 +1000
Subject: Support for Vim (was: vim - what's a smarttab?)
References: <1190624225.926815.149720@50g2000hsm.googlegroups.com>
	<mailman.978.1190630969.2658.python-list@python.org>
	<1190693749.202770.227890@57g2000hsv.googlegroups.com>
Message-ID: <87ejgnnyp8.fsf_-_@benfinney.id.au>

7stud <bbxx789_05ss at yahoo.com> writes:

> Thanks!  I spent an hour hunting around on google with no
> success. :(
> 
> Another question if you don't mind

Rather than have comp.lang.python turn into a support forum for
questions about specific editors, I'll point you to the Vim site:

    <URL:http://www.vim.org/>

which has many resources for assistance:

    <URL:http://www.vim.org/community.php>

-- 
 \         "True greatness is measured by how much freedom you give to |
  `\      others, not by how much you can coerce others to do what you |
_o__)                                             want."  --Larry Wall |
Ben Finney


From tismer at stackless.com  Thu Sep 20 22:57:44 2007
From: tismer at stackless.com (Christian Tismer)
Date: Fri, 21 Sep 2007 04:57:44 +0200
Subject: Can't import Stackless in Pythonwin
In-Reply-To: <1171118831.573543.231200@m58g2000cwm.googlegroups.com>
References: <1171039856.077320.163610@s48g2000cws.googlegroups.com>	<mailman.3786.1171048009.32031.python-list@python.org>
	<1171118831.573543.231200@m58g2000cwm.googlegroups.com>
Message-ID: <46F33328.7000405@stackless.com>

archaegeo at gmail.com wrote:
...

> But for pythonwin i get
>>>> import sys
>>>> print sys.version
> 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit (Intel)]
>>>> print sys.executable
> C:\Python25\Lib\site-packages\pythonwinPythonwin.exe
> 
> So does this mean stackless is not usable with pythonwin?

Your python<version>.dll needs to live in your <windows>\system32
directory (or in the current directory if you are running
  stackless temporarily).

If things are set up properly, you will
be able to import stackless from PythonWin.

Be aware of Stackless not being very stable on PythonWin, cause
it creates a new interpreter state after every input.
It works to some extent, but I did not test this for a longer time.
Also, it is quite likely that the debugger gets confused by tasklet
switching.

It seems to work pretty stable with wxpython and Boa constructor.
wxpython has a few problems, too, but they are easy to work around.
Contact me privately or on the stackless list if you need support.

> Also, is pythonwin needed for the win32 extensions and mfc?

yes.

cheers - chris
-- 
Christian Tismer             :^)   <mailto:tismer at stackless.com>
tismerysoft GmbH             :     Have a break! Take a ride on Python's
Johannes-Niemeyer-Weg 9A     :    *Starship* http://starship.python.net/
14109 Berlin                 :     PGP key -> http://wwwkeys.pgp.net/
work +49 30 802 86 56  mobile +49 173 24 18 776  fax +49 30 80 90 57 05
PGP 0x57F3BF04       9064 F4E1 D754 C2FF 1619  305B C09C 5A3B 57F3 BF04
       whom do you want to sponsor today?   http://www.stackless.com/


From afriere at yahoo.co.uk  Mon Sep  3 21:29:07 2007
From: afriere at yahoo.co.uk (Asun Friere)
Date: Mon, 03 Sep 2007 18:29:07 -0700
Subject: Python is overtaking Perl
In-Reply-To: <20070904024908.b8aca60c.sulsa@gazeta.pl>
References: <1188865943.238573.218750@w3g2000hsg.googlegroups.com>
	<20070904024908.b8aca60c.sulsa@gazeta.pl>
Message-ID: <1188869347.102325.119830@w3g2000hsg.googlegroups.com>

On Sep 4, 10:49 am, Sulsa <su... at gazeta.pl> wrote:
> On Tue, 04 Sep 2007 00:32:23 -0000
>
> Ben <benyan... at gmail.com> wrote:
> > Here are the statistics from Google Trends:
>
> >http://benyang22a.blogspot.com/2007/09/perl-vs-python.html
>
> This chart is showing that amount of python programers is smaller every
> year :(

How do you figure that?  Isn't the chart showing the frequency of
those particular terms combined as a fraction of the total search
volume on Google?



From arkanes at gmail.com  Tue Sep  4 16:49:20 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Tue, 4 Sep 2007 15:49:20 -0500
Subject: Undeterministic strxfrm?
In-Reply-To: <lKiDi.237$327.182@read3.inet.fi>
References: <ixaDi.63$327.50@read3.inet.fi>
	<mailman.37.1188933223.2658.python-list@python.org>
	<lKiDi.237$327.182@read3.inet.fi>
Message-ID: <4866bea60709041349x5716d8b2l19796e490a048656@mail.gmail.com>

On 9/4/07, Tuomas <tuomas.vesterinen at pp.inet.fi> wrote:
> Gabriel Genellina wrote:
> > En Tue, 04 Sep 2007 07:34:54 -0300, Tuomas
> > <tuomas.vesterinen at pp.inet.fi>  escribi?:
> >
> >> Python 2.4.3 (#3, Jun  4 2006, 09:19:30)
> >> [GCC 4.0.0 20050519 (Red Hat 4.0.0-8)] on linux2
> >> Type "help", "copyright", "credits" or "license" for more information.
> >>  >>> import locale
> >>  >>> def key(s):
> >> ...     locale.setlocale(locale.LC_COLLATE, 'en_US.utf8')
> >> ...     return locale.strxfrm(s.encode('utf8'))
> >> ...
> >>  >>> first=key(u'maupassant guy')
> >>  >>> first==key(u'maupassant guy')
> >> False
> >>  >>> first
> >> '\x18\x0c \x1b\x0c\x1e\x1e\x0c\x19\x1f\x12
> >> $\x01\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x01\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x01\xf5\xb79'
> >>
> >>  >>> key(u'maupassant guy')
> >> '\x18\x0c \x1b\x0c\x1e\x1e\x0c\x19\x1f\x12
> >> $\x01\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x01\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x01\xb5'
> >>
> >>  >>>
> >>
> >> May be this is enough for a sort order but I need to be able to catch
> >> equals too. Any hints/explanations?
> >
> >
> > I can't use your same locale, but with my own locale settings, I get
> > consistent results:
> >
> > Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit
> > (Intel)] on
> > win32
> > Type "help", "copyright", "credits" or "license" for more information.
> > py> import locale
> > py> locale.setlocale(locale.LC_COLLATE, 'Spanish_Argentina')
> > 'Spanish_Argentina.1252'
> > py> def key(s):
> > ...   return locale.strxfrm(s.encode('utf8'))
> > ...
>
> Because I am writing a multi language application I need to plase the
> locale setting inside the key function. Actually I am implementing
> binary search in a locally sorted list of strings and should be able to
> count on stable results of strxfrm despite possibly visiting another
> locale at meantime. Could repeated calls to setlocale cause some problems?
>
> > py> first=key(u'maupassant guy')
> > py> print repr(first)
> > '\x0eQ\x0e\x02\x0e\x9f\x0e~\x0e\x02\x0e\x91\x0e\x91\x0e\x02\x0ep\x0e\x99\x07\x02
> >
> > \x0e%\x0e\x9f\x0e\xa7\x01\x01\x01\x01'
> > py> print repr(key(u'maupassant guy'))
> > '\x0eQ\x0e\x02\x0e\x9f\x0e~\x0e\x02\x0e\x91\x0e\x91\x0e\x02\x0ep\x0e\x99\x07\x02
> >
> > \x0e%\x0e\x9f\x0e\xa7\x01\x01\x01\x01'
> > py> print first==key(u'maupassant guy')
> > True
> >
> > Same thing with Python 2.4.4
> >
>
> I get the same unstability with my locale 'fi_FI.utf8' too, so I am
> wondering if the source of the problem is the clib or the Python wrapper
> around it.

Looking at the python source, the only possible error case I can see
is that the wrapper assumes the string returned by strxfrm will be
null terminated.

It's not 100% clear from the documentation I have that the string is
guaranteed to be null terminated, although it's implied, so this is a
remotely possible case. You might try calling the clib directly.

From bignose+hates-spam at benfinney.id.au  Mon Sep 24 05:01:53 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 24 Sep 2007 19:01:53 +1000
Subject: Passing parameters at the command line (New Python User)
References: <1190621098.582906.49760@r29g2000hsg.googlegroups.com>
Message-ID: <87d4w8phby.fsf@benfinney.id.au>

cjt22 at bath.ac.uk writes:

> I have never used Python to pass in arguments at the command line so
> any help would be much appreciated.

Your 'main()' approach is good. I'd rather have the function require
an 'argv' parameter, and have the default set only in the 'if __name__
== "__main__":' block, since that fits my ideas better about the
defaults.

    def main(argv):
        parse_commandline(argv)
        do_cool_stuff()

    if __name__ == "__main__":
        from sys import argv
        main(argv)

I also tend to catch SystemExit in the function, so the exit code can
be returned instead of raised; but that's outside the scope of this
thread.

For anything more advanced than unconditionally grabbing arguments in
sequence from the command line, you should investigate the 'optparse'
module <URL:http://docs.python.org/lib/module-optparse> from the
standard library.

-- 
 \                         "Holy knit one purl two, Batman!"  -- Robin |
  `\                                                                   |
_o__)                                                                  |
Ben Finney


From stef.mientki at gmail.com  Sun Sep 23 11:28:38 2007
From: stef.mientki at gmail.com (stef mientki)
Date: Sun, 23 Sep 2007 17:28:38 +0200
Subject: building a GUI
In-Reply-To: <1190557293.266783.251480@y42g2000hsy.googlegroups.com>
References: <1190557293.266783.251480@y42g2000hsy.googlegroups.com>
Message-ID: <46F68626.6010907@gmail.com>

yadin wrote:
> if i were up to make a GUI chich are the advantages of choosing python
> over matlab or java?
>
>   
As MatLab has a very lousy GUI,
any other language would be an advantage ;-)

The best is Delphi,
second is VB,
then comes SciLab, Python, etc
I don't know where Java fits in.

But as Wildemar said, your question is much to broad.

cheers,
Stef


From sjmachin at lexicon.net  Sun Sep 16 19:21:53 2007
From: sjmachin at lexicon.net (John Machin)
Date: Sun, 16 Sep 2007 16:21:53 -0700
Subject: Try this
In-Reply-To: <1189983233.709832.124290@19g2000hsx.googlegroups.com>
References: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>
	<13eqsdfsfvsa16f@corp.supernews.com>
	<1189969529.652871.19280@50g2000hsm.googlegroups.com>
	<mailman.621.1189970593.2658.python-list@python.org>
	<1189979679.969074.216490@y42g2000hsy.googlegroups.com>
	<1189981681.745195.18130@y42g2000hsy.googlegroups.com>
	<1189983233.709832.124290@19g2000hsx.googlegroups.com>
Message-ID: <1189984913.956999.163100@n39g2000hsh.googlegroups.com>

On Sep 17, 8:53 am, "mensana... at aol.com" <mensana... at aol.com> wrote:
> On Sep 16, 5:28?pm, John Machin <sjmac... at lexicon.net> wrote:
>
>
>
> > On Sep 17, 7:54 am, "mensana... at aol.com" <mensana... at aol.com> wrote:
>
> > > On Sep 16, 2:22?pm, Steve Holden <st... at holdenweb.com> wrote:
>
> > > > mensana... at aol.com wrote:
> > > > > On Sep 16, 1:10?pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> > > > >> On Sun, 16 Sep 2007 01:46:34 -0700, GeorgeRXZ <george... at gmail.com>
> > > > >> declaimed the following in comp.lang.python:
>
> > > > >>> Then Open the Notepad and type the following sentence, and save the
> > > > >>> file and close the notepad. Now reopen the file and you will find out
> > > > >>> that, Notepad is not able to save the following text line.
> > > > >>> Well you are speed
> > > > >>> This occurs not only with above sentence but any sentence that has
> > > > >>> 4 3 3 5 (sequence of characters: Well=4 you=3 are=3 speed=5)
> > > > >>         I tried. I also opened the saved file in SciTE...
> > > > >> And the text WAS there...
>
> > > > >>         It is Notepad that can not properly render what it,
> > > > >> itself, saved.
>
> > > > > C:\Documents and Settings\mensanator\My Documents>type huh.txt
> > > > > Well you are speed
>
> > > > > Yes, file was saved correctly.
> > > > > But reopening it shows 9 unprintable characters.
> > > > > If I copy those to a new file (huh1.txt):
>
> > > > > C:\Documents and Settings\mensanator\My Documents>type huh1.txt
> > > > > ?????????
>
> > > > > But wait...the new file is 20 characters, not 9.
>
> > > > > 09/16/2007  01:44 PM                18 huh.txt
> > > > > 09/16/2007  01:54 PM                20 huh1.txt
>
> > > > > C:\Documents and Settings\mensanator\My Documents>dump huh.txt
> > > > > huh.txt:
> > > > > 00000000  5765 6c6c 2079 6f75 2061 7265 2073 7065 Well you are spe
> > > > > 00000010  6564                                    ed
>
> > > > > Here's what it's actually doing:
>
> > > > > C:\Documents and Settings\mensanator\My Documents>dump huh1.txt
> > > > > huh1.txt:
> > > > > 00000000  fffe 5765 6c6c 2079 6f75 2061 7265 2073 .~Well you are s
> > > > > 00000010  7065 6564                               peed
>
> > > > One word: Unicode.
>
> > > > The "open" and "save" dialogs allow you to specify an encoding.
>
> > > And the encoding specified was ANSI.
>
> > > > If you
> > > > specify Unicode the you will get what you see above.
>
> > > And if you specify ANSI _before_ you click the file name,
> > > the specification switches to Unicode and has to then
> > > be manually switched back to ANSI.
>
> > > > If you specify ANSI
> > > > you will get the text you entered.
>
> > > It's still a bug in the "open" dialog.
>
> > It's more like a bug/feature in its encoding detector.
>
> It is NOT a feature. If I save something as ANSI,
> there is no excuse for it not to re-open in ANSI.

It doesn't know that you or anybody else saved it as "ANSI". All it is
seeing is a string of bytes.

If you are silly enough to type in
????????????????????????
[that's "\xef\xbb\xbf" repeated a few times]
and save it as "ANSI", it has every excuse to open it as something
else :-)

>
> > I can get it to
> > switch to Unicode only if there's an even number of characters AND the
> > line is NOT terminated by CRLF -- add/remove one alpha character, or
> > hit the enter key at the end of the line, and it won't detect it as
> > Unicode when you open it again.
>
> > You only get the BOM (0xfffe) if you are silly enough to save it while
> > it's open in Unicode mode.
>
> That was a test. I wasn't so stupid as to save
> to the original file, but to make a copy.
>
>
>
> > > > By the way, this has precisely what to do with Python?
>
> > > I've been known to use Notepad to create Python
> > > source code.
>
> > Your source code would have to be trivially short to trigger the
> > strange behaviour.
>
> Makes you wonder what other edge cases aren't
> handled properly.
>
> Makes you wonder why Microsoft doesn't employ
> professional programmers.

I'm eagerly awaiting publication of your professional specification
for correctly detecting the encoding of an arbitrary stream of
bytes :-)



From ogbash at gmail.com  Mon Sep 24 12:05:17 2007
From: ogbash at gmail.com (Oleg Batrashev)
Date: Mon, 24 Sep 2007 16:05:17 -0000
Subject: building a GUI
In-Reply-To: <1190557293.266783.251480@y42g2000hsy.googlegroups.com>
References: <1190557293.266783.251480@y42g2000hsy.googlegroups.com>
Message-ID: <1190649917.680777.101540@w3g2000hsg.googlegroups.com>

On Sep 23, 5:21 pm, yadin <conra2... at yahoo.com> wrote:
> if i were up to make a GUI chich are the advantages of choosing python
> over matlab or java?

Haven't seen any free visual layout program for swing, swing is
somewhat messy - unnecessary complex layout classes. Compile - run
cycle without visual layouting is pain. Swing look is unnatural,
native looks are buggy.

glade + pygtk works well for me (in linux).

Oleg



From bdesth.quelquechose at free.quelquepart.fr  Wed Sep 19 15:25:38 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 19 Sep 2007 21:25:38 +0200
Subject: cannot create my own dict
In-Reply-To: <mailman.762.1190207558.2658.python-list@python.org>
References: <slrnff260r.43o.hat@se-162.se.wtb.tue.nl>
	<mailman.762.1190207558.2658.python-list@python.org>
Message-ID: <46f177d9$0$12915$426a34cc@news.free.fr>

Steve Holden a ?crit :
> A.T.Hofkamp wrote:
> 
(snip)

>> So if copying all methods of a native dictionary is not enough, what 
>> should I
>> do to make my class work as a dictionary WITHOUT deriving from dict 
>> (which will
>> obviously work).
>>
> You have to overwrite the "__new__" method to return an object of your 
> new type.

???

This applies to subclasses of immutable types, but I don't see the point 
here. The problem is - as Peter pointed out - that __magic__ methods are 
not looked up in instances when using new-style classes.


From nutsbreaker3 at gmail.com  Tue Sep 18 14:47:06 2007
From: nutsbreaker3 at gmail.com (nutsbreaker3 at gmail.com)
Date: Tue, 18 Sep 2007 11:47:06 -0700
Subject: World's best guitars ever!!!!
Message-ID: <1190141226.315436.325350@w3g2000hsg.googlegroups.com>

http://freeguitars.blogspot.com/



From kyosohma at gmail.com  Wed Sep 12 12:05:54 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 12 Sep 2007 16:05:54 -0000
Subject: is it possible to use different font within one wxpython static
	text widget?
In-Reply-To: <cbb24$46e8052d$839b8704$27403@news2.tudelft.nl>
References: <cbb24$46e8052d$839b8704$27403@news2.tudelft.nl>
Message-ID: <1189613154.244069.15590@o80g2000hse.googlegroups.com>

On Sep 12, 10:26 am, "hyena" <a... at hut.at> wrote:
> problem is as title, bear me if this too silly or too naive.
>
> I use wx.statictext widget to show some information in GUI, there are some
> numbers in the text to be emphasized in bigger other color. For example, in
> sentence "the travel speed of this car is 40 km /hour", I would like "40" to
> be bigger and in red color. I know I can use several statictext to get this
> effect. But i am quite relucktant to do so since I am quite unfamiliar with
> manageing the layout of widgets.
>
> Is there a convinient way to have this done? Thanks for any .input


Without knowing what kind of interface you're making, I can only shoot
in the dark. From your question, I would think that the FancyText
widget would suffice. Other widgets that would be harder to use would
be the StyledTextCtrl and the HtmlWindow (which I use for About
dialogs).

Check out the wxPython Demo for sample code on each of these widgets
and sizers. Also see the Wiki for tips and tricks on using Sizers.
There's a new SizedControl that's supposed to simplify creating
layouts, although I haven't used it. And there's also XRC too.

Mike



From laurent.pointal at wanadoo.fr  Wed Sep 19 16:39:28 2007
From: laurent.pointal at wanadoo.fr (Laurent Pointal)
Date: Wed, 19 Sep 2007 22:39:28 +0200
Subject: lxml and identification of elements in source
Message-ID: <46f18900$0$5083$ba4acef3@news.orange.fr>

Hello,

I use lxml to parse a document, modify some elements in the tree, run
xinclude on it (thanks to Stefan Behnel for the pointer), and finally use
the data to feed my sax-aware tool.

To report warnings/errors to the user (not related to XML itself, but to
things like missing source for a cross-reference by example), is there a
way to get the source-file and line/column of an element ?

[note: these informations are available when lxml parse the source, but are
they kept anywhere in the document tree ?]

Thanks.

Laurent.



From apardon at forel.vub.ac.be  Tue Sep  4 02:28:54 2007
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 4 Sep 2007 06:28:54 GMT
Subject: Does shuffle() produce uniform result ?
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
	<mailman.243.1187955760.32294.python-list@python.org>
	<tooru_honda-7C82D1.10432725082007@wvnews01.netvigator.com>
	<tooru_honda-58C552.20355225082007@wvnews01.netvigator.com>
	<tooru_honda-978B9E.11304526082007@wvnews01.netvigator.com>
	<slrnfdnojg.inr.apardon@rcpc42.vub.ac.be>
	<7xejhfbsjo.fsf@ruckus.brouhaha.com>
Message-ID: <slrnfdpup6.inr.apardon@rcpc42.vub.ac.be>

On 2007-09-03, Paul Rubin <http> wrote:
> Antoon Pardon <apardon at forel.vub.ac.be> writes:
>> If I understand correctly that you are using urandom as a random
>> generator I wouldn't trust too much on this performance. Urandom
>> uses the systemwide entropy-pool. If other programs need this pool
>> too, your performance can drop spectaculary. 
>
> No the idea is that once there's enough entropy in the pool to make
> one encryption key (say 128 bits), the output of /dev/urandom is
> computationally indistinguishable from random output no matter how
> much data you read from it.

If you were talking about /dev/random I would agree. But this is what
the man page on my system says about /dev/urandom

       A read from the /dev/urandom device will not block waiting for
       more entropy.  As a result,  if  there  is  not  sufficient
       entropy  in the entropy pool, the returned values are
       theoretically vulnerable to a cryptographic attack on the algorithms
       used by the driver.  Knowledge of how to do this is not available
       in the current non-classified literature, but it is the-
       oretically possible that such an attack may exist.  If this is a
       concern in your application, use /dev/random instead.

And reading from /dev/random can block if there is not enough entropy.

-- 
Antoon Pardon



From BjornSteinarFjeldPettersen at gmail.com  Wed Sep 26 00:17:44 2007
From: BjornSteinarFjeldPettersen at gmail.com (thebjorn)
Date: Wed, 26 Sep 2007 04:17:44 -0000
Subject: %s shortcut?
In-Reply-To: <1190775317.062210.234400@g4g2000hsf.googlegroups.com>
References: <1190775317.062210.234400@g4g2000hsf.googlegroups.com>
Message-ID: <1190780264.426322.237690@g4g2000hsf.googlegroups.com>

On Sep 26, 4:55 am, james_027 <cai.hai... at gmail.com> wrote:
> hi i have something like this
>
> cursor.execute("""
>             select c.name,
>                 (select from ap_invoice i where Month(i.date) = 1 and
> Year(i.date) = %s and i.customer_id = c.id and i.status != 'CAN') jan,
>                 (select from ap_invoice i where Month(i.date) = 2 and
> Year(i.date) = %s and i.customer_id = c.id and i.status != 'CAN') feb,
>                 (select from ap_invoice i where Month(i.date) = 3 and
> Year(i.date) = %s and i.customer_id = c.id and i.status != 'CAN') mar
>             from ap_customer c
>             order by %s""",
>             [year, order_by])
>
> what I could like to happen is ... since the first three %s points to
> the same year variable, how do I let python know it without doing
> [year ,year, year, order_by] ... This should be 12 I just cut it down
>
> Thanks
> james

You could do [year]*12 + [order_by] like so:

>>> [1970] * 12 + ['foo']
[1970, 1970, 1970, 1970, 1970, 1970, 1970, 1970, 1970, 1970, 1970,
1970, 'foo']
>>>

I don't know which database you're using, but the above doesn't look
like SQL'92...

-- bjorn



From sjmachin at lexicon.net  Tue Sep 18 17:31:52 2007
From: sjmachin at lexicon.net (John Machin)
Date: Tue, 18 Sep 2007 14:31:52 -0700
Subject: How do you limit the # of lines Read?
In-Reply-To: <1190149187.799482.151320@19g2000hsx.googlegroups.com>
References: <1190149187.799482.151320@19g2000hsx.googlegroups.com>
Message-ID: <1190151112.134222.208470@r29g2000hsg.googlegroups.com>

On Sep 19, 6:59 am, kou... at hotmail.com wrote:
> I am working on a loop for my code and was wondering if there is a way
> to limit the number of lines read through?  I'd hate to cut the test
> file in order to run the code in the testing phase.  Can you add a
> value in the parenthesis of the readline() function?
>
> t = string.readline()  # Limit this somehow?

*STRING*.readline() ????




From rrr at ronadam.com  Fri Sep 21 18:44:39 2007
From: rrr at ronadam.com (Ron Adam)
Date: Fri, 21 Sep 2007 17:44:39 -0500
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <1190412475.772358.109810@n39g2000hsh.googlegroups.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
Message-ID: <46F44957.6060700@ronadam.com>



Cristian wrote:
> My hope is to subtly reinforce the notion that functions are data
> and can be passed around. The current function declaration doesn't
> help with this. Creating a function and assigning it to a name is
> exactly what Python does, why not have it come out in the syntax? It's
> not necessary, yes, but I think it would be helpful for teaching
> purposes.

I think key may be to discuss names and name binding with your friend.  How 
a name is not the object it self, like a variable is in other languages. 
For example show him how an object can have more than one name.  And discus 
how names can be bound to nearly anything, including classes and functions.


> Again, it's not necessary as much as it's more intuitive and obvious
> what's going on. This helps a beginner sort out the process from the
> syntax without taking it on faith. They can see the class declaration
> and see "I'm defining just another attribute to this class only this
> time it happens to be method".
> 
> There is nothing functionally lacking in Python. I'm just curious if
> there's anything Python can do syntax-wise to help a person better
> grasp programming ideas and Python's inner workings.

You could also discus factory functions with him.  Once he gets that a 
function can return another function, then it won't be so much of a leap 
for a function to take a function as an argument.

Of course he'll figure out all this sooner or later anyway.  You can't be 
an engineer without a fair amount of brain cells committed to processing 
abstract concepts.

Cheers,
   Ron



From R.W.Thomas.02 at cantab.net  Thu Sep 27 13:12:59 2007
From: R.W.Thomas.02 at cantab.net (Richard Thomas)
Date: Thu, 27 Sep 2007 18:12:59 +0100
Subject: True of False
In-Reply-To: <1190912324.363127.26100@r29g2000hsg.googlegroups.com>
References: <1190910814.594559.30880@n39g2000hsh.googlegroups.com>
	<mailman.1173.1190911739.2658.python-list@python.org>
	<1190912324.363127.26100@r29g2000hsg.googlegroups.com>
Message-ID: <1b54228d0709271012h5658aef8rce2fbf40e6231a59@mail.gmail.com>

On 27/09/2007, Casey <Caseyweb at gmail.com> wrote:
> On Sep 27, 12:48 pm, "Simon Brunning" <si... at brunningonline.net>
> wrote:
> > On 9/27/07, kou... at hotmail.com <kou... at hotmail.com> wrote:
> >
> > > I tried writing a true and false If statement and didn't get
> > > anything?  I read some previous posts, but I must be missing
> > > something.  I just tried something easy:
> >
> > > a = ["a", "b", "c", "d", "e", "f"]
> >
> > > if "c" in a == True:
> > >      Print "Yes"
> >
> > > When I run this, it runs, but nothing prints.  What am I doing wrong?
> >
> > Just use
> >
> > if "c" in a:
> >
> > and all will be well. The True object isn't the only truthy value in
> > Python - see <http://docs.python.org/lib/truth.html>.
>
> I would recommend the OP try this:
>
> run the (I)python shell and try the following:
>
> >>> a = [x for x in "abcdefg"]
> >>> a
> ['a','b','c','d','e','f','g']
> >>> "c" in a
> True
> >>> "c" in a == True
> False
> >>> ("c" in a) == True
> True
>
> The reason your conditional failed is that it was interpreted as "c"
> in (a == True) which is False.
> the "==" operator binds at a higher precedence level than the "in"
> operator, just as multiplication
> binds higher than addition
>

Actually it evaluates '("c" in a) and (a == True)'. You can check like so:

import dis
a = list("abcdef")
dis.dis(lambda: "c" in a == True)

And just follow the bytecode operations.

-- Richard.

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


From msmanu78 at yahoo.com  Mon Sep  3 07:35:44 2007
From: msmanu78 at yahoo.com (HR Head)
Date: Mon, 03 Sep 2007 11:35:44 -0000
Subject: Urgently Required SAP CO-COPA Functional Lead
Message-ID: <1188819344.552205.214360@d55g2000hsg.googlegroups.com>



We urgently require following skill set for singapore client

SAP CO-COPA Functional Lead: Person with a strong Costing background.

Should have hands on SAP "COPA" experience

Minimum two implementations in Controling based Profitability Analysis
(COPA) and Product Costing (COPC) in the SAP COPA skill set.

Project Asset and Project costing

Must have 5+ years of SAP experience

Should be capable of handling Blueprinting and be a good
Communicator.

O Base location: Al Khobar, KSA ( near Dhaharan)

As the spec suggest, we are looking at predominantly a Costing person.
He
should have at least 2 implementation experience on costing preferably
Project Asset, + Profitability Analysis and Product costing.

A muslim candidate would be ideal, but this is not mandatory.
Pakistani /
Indonesian and Malay apart from Indians will be a good bet.

O Duration: 15 months

O Rate: US$ 7500 per month (housing included) + medical insurance +
Air
travel

Please feel free to refer your friends for same cv's to be send to
isoft_staff at yahoo.com



From skulka3 at gmail.com  Thu Sep 27 12:29:16 2007
From: skulka3 at gmail.com (skulka3 at gmail.com)
Date: Thu, 27 Sep 2007 16:29:16 -0000
Subject: Implement file download using python
Message-ID: <1190910556.681518.277220@o80g2000hse.googlegroups.com>

Hello,

I want to implement file downloads inside an authenticated web page,
such that when a user clicks a link, the server side python code
connects to a ftp server, downloads a relevant file and then streams
the file to the browser for the user to open it with the appropriate
application. In this case it will either be a pdf or a tiff file.

This function is quite similar to something like writing raw bytes to
a ServletOutputStream in java to be rendered directly to the user.

It would be nice if someone can provide guidance, examples on how such
a task may be accomplished using python.

Thanks,
Salil .



From miki.tebeka at gmail.com  Sun Sep  9 02:21:05 2007
From: miki.tebeka at gmail.com (Miki)
Date: Sun, 09 Sep 2007 06:21:05 -0000
Subject: debugging program that uses ctypes
In-Reply-To: <1189178285.647177.216320@g4g2000hsf.googlegroups.com>
References: <1189178285.647177.216320@g4g2000hsf.googlegroups.com>
Message-ID: <1189318865.787351.310680@r34g2000hsd.googlegroups.com>

Hello Marco,

> hi all, I have a python program that calls a dll through ctypes
> (py2.5). In some (reproducible)
> conditions the program crashes with an error in ctypes module.
> How can I trace down the problem? I have created a debug build of
> python but I also use pyodbc
> and dateutil libraries in my program and I don't know how to make them
> visible to python_d.exe
> Am I using the right approach?
If you are the one compiling the called module, you can add `__asm int
3` somewhere in
the code. When this is reached, the windows debugger will pop up on
the line.

HTH,
--
Miki <miki.tebeka at gmail.com>
http://pythonwise.blogspot.com



From michele.simionato at gmail.com  Wed Sep 19 09:41:34 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Wed, 19 Sep 2007 13:41:34 -0000
Subject: super() doesn't get superclass
In-Reply-To: <MKD*JIeVr@news.chiark.greenend.org.uk>
References: <8764281uea.fsf@benfinney.id.au><876427zhzq.fsf@benfinney.id.au>
	<13f196qktorgc88@corp.supernews.com>
	<873axbxl2f.fsf@benfinney.id.au>
	<MKD*JIeVr@news.chiark.greenend.org.uk>
Message-ID: <1190209294.584372.173410@o80g2000hse.googlegroups.com>

On Sep 19, 3:22 pm, Sion Arrowsmith <si... at chiark.greenend.org.uk>
wrote:
> Ben Finney  <bignose+hates-s... at benfinney.id.au> wrote:
>
> > If a function is named 'super' and operates on
> >classes, it's a pretty strong implication that it's about
> >superclasses.
>
> But it doesn't (under normal circumstances) operate on classes.
> It operates on an *instance*. And what you get back is a (proxy
> to) a superclass/ancestor of the *instance*.
>
> (And in the super(A, B) case, you get a superclass/ancestor of
> *B*. As has just been said somewhere very near here, what is
> misleading is the prominence of A, which isn't really the most
> important class involved.)
>

Happily A (and B too) will become invisible in Python 3000.

    Michele Simionato



From bdesth.quelquechose at free.quelquepart.fr  Sun Sep 16 15:12:04 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 16 Sep 2007 21:12:04 +0200
Subject: Python 3K or Python 2.9?
In-Reply-To: <1189807123.163995.104180@g4g2000hsf.googlegroups.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189807123.163995.104180@g4g2000hsf.googlegroups.com>
Message-ID: <46ed8034$0$19495$426a74cc@news.free.fr>

John Roth a ?crit :
> On Sep 12, 11:35 am, TheFlyingDutchman <zzbba... at aol.com> wrote:
> 
>>On Sep 12, 4:40 am, Bjoern Schliessmann <usenet-mail-0306.20.chr0n... at spamgourmet.com> wrote:
>>
>>>Ivan Voras wrote:
>>>
>>>>What does "self" have to do with an object model? It's an
>>>>function/method argument that might as well be hidden in the
>>>>compiler without ever touching the role it has (if not, why?). I
>>>>agree that it's needless noise in a language.
>>
>>>If this was needless, why do C++ and Java have the "this" pointer?
>>
>>"this" in C++ and Java is not shown in the parameter list, which was
>>what he was
>>complaining about.  He wants
>>
>>class MyClass:
>>        def SomeFunction(someParameter):
>>           self.someParameter = someParameter
>>
>>not
>>
>>class MyClass:
>>        def SomeFunction(self, someParameter):
>>           self.someParameter = someParameter
>>
>>The confusing way about the current Python method when you first
>>encounter it is
>> why is "self" being passed in when you write the function but not
>>when you call it. If the compiler is smart enough to know that
>>
>>    a = MyClass()
>>    a.SomeFunction(12)
>>
>>SomeFunction() has a "self" implicitly added to the parameter list, it
>>seems that it should be smart enough to know that a function defined
>>in a class has a "self" implicitly added to the parameter list.
> 
> 
> Pretty close. This is one of the things that's always puzzled me about
> the discussion. Making self and cls keyword pseudo-constants that get
> the current instance and class from the stack frame (or raise an
> exception) would eliminate them from the method header.

I suppose that by header, you mean prototype or signature. But anyway, 
it's not a *method* signature, it's a *function* signature - and the 
compiler persists to have nothing to do with all this...

> It would ALSO eliminate a whole level of indirection in method
> invocation and get rid of the instancemethod, classmethod and
> staticmethod wrapper classes. This would be a significant
> simplification. If it had been done earlier, it would have eliminated
> most of the justification for method attributes (those silly @
> things), 

"those silly @ things" has *nothing* to do with methods nor with 
attributes. It's just syntactic sugar for HOFs. Period.

> thus showing that unneeded complexity breeds more unneeded
> complexity.

John, there are plenty of other OOPls around that don't requires neither 
explicit use of the instance/class reference nor mention of it in the 
function . If after having read this whole thread and all relevant 
documentation, you still don't understand why Python works that way and 
why most of us are *totally* happy with the way it works, I strongly 
suggest that you switch to another language. Not that I have nothing 
personal against you, but it should be quite clear that this part of 
Python is not going to change - FWIW, as Alex pointed out, I doubt even 
GvR could impose such a change now.


From arnau at ehas.org  Wed Sep  5 12:30:27 2007
From: arnau at ehas.org (Arnau Sanchez)
Date: Wed, 05 Sep 2007 18:30:27 +0200
Subject: Text processing and file creation
In-Reply-To: <1189008809.718361.45790@g4g2000hsf.googlegroups.com>
References: <1189008809.718361.45790@g4g2000hsf.googlegroups.com>
Message-ID: <46DED9A3.7070006@ehas.org>

malibuster at gmail.com escribi?:

> I have a text source file of about 20.000 lines.
>>From this file, I like to write the first 5 lines to a new file. Close
> that file, grab the next 5 lines write these to a new file... grabbing
> 5 lines and creating new files until processing of all 20.000 lines is
> done.
> Is there an efficient way to do this in Python?

Perhaps you could provide some code to see how you approached it?


From steve at holdenweb.com  Thu Sep 27 21:17:30 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 27 Sep 2007 21:17:30 -0400
Subject: Python 3.0 migration plans?
In-Reply-To: <fdhja4$qdk$1@daisy.noc.ucla.edu>
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<fdhja4$qdk$1@daisy.noc.ucla.edu>
Message-ID: <fdhknb$has$1@sea.gmane.org>

James Stroud wrote:
> Steve Holden wrote:
>> I wondered if a straw poll could get some idea of readers' thoughts 
>> about when they will be migrating to 3.0 on, so I used the new widget on 
>> Blogger to add a poll for that.
>>
>> I'd appreciate if if you would go to
>>
>>   http://holdenweb.blogspot.com/
>>
>> and register your vote on your intended migration timescale.
>>
>> Thanks!
> 
> I'm going to abstain voting until 'public beta + about 1 year' is a choice.
> 
Richard Jones wrote:
 > I'll use the "no plans" response for my actual "no simple answer" real
 > response.
 >
 >
So what we need is a poll on what the questions should be. I *love* c.l.py.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From steven.bethard at gmail.com  Sun Sep  2 22:40:35 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 02 Sep 2007 20:40:35 -0600
Subject: reload(sys)
In-Reply-To: <1188662049.337034.58220@w3g2000hsg.googlegroups.com>
References: <1188521143.421431.119100@l22g2000prc.googlegroups.com>
	<JK2dnSgydPkg8ErbnZ2dnUVZ_u3inZ2d@comcast.com>
	<1188564816.430863.219560@w3g2000hsg.googlegroups.com>
	<f8GdnZ-6HbH-1kXbnZ2dnUVZ_s3inZ2d@comcast.com>
	<1188662049.337034.58220@w3g2000hsg.googlegroups.com>
Message-ID: <b4GdnYMUSPu56UbbnZ2dnUVZ_u2mnZ2d@comcast.com>

S?nmez Kartal wrote:
> I was using the XMLBuilder(xmlbuilder.py). I'm writing XML files as
> "f.write(str(xml))". At execution of that line, it gives error with
> description, configure your default encoding...
>
[and later]
>
> I get this when it happens: "Decoding Error: You must configure
> default encoding" which comes from in the code excerpt in
> xmlbuilder.py (http://rafb.net/p/9rURi822.html)

Can you show the code where you populate the XMLBuilder? I'm guessing 
you're doing something like::

     import xmlbuilder
     builder = xmlbuilder.XMLBuilder()
     builder.foo = dict(bar='? and ?')
     str(builder)

That breaks because the string '? and ?' is not properly encoded. Have 
you declared an encoding in your source file? PEP 263 shows you how:

     http://www.python.org/dev/peps/pep-0263/

Note that with Python 2.5 the code above gives a SyntaxError without a 
proper encoding. You should also probably be prefixing your string 
literals containing weird characters with "u" to make them unicode. 
Doing both of these in the code above made it work for me.

STeVe


From nickel_and_dime_2death at yahoo.com  Fri Sep  7 13:39:42 2007
From: nickel_and_dime_2death at yahoo.com (nickel_and_dime_2death at yahoo.com)
Date: Fri, 07 Sep 2007 10:39:42 -0700
Subject: Example script -- Group Project Task Scheduler
Message-ID: <1189186782.187744.28740@57g2000hsv.googlegroups.com>

Hello, trying to get UpToSpeed with a cross-platform application that
would mimic capabilities like Microsoft Project. Playing around with
code is what works for me. Searching is a mangled process, i.e. I've
banged around terms like: "project", "scheduler", "class scheduler",
"student calendar" ... and on and on. Python descriptions / howtos /
tutorials / documentations have used most of the search terms I can
think of define Python's nuts and bolts. Web research of my quest is
not getting me to any examples I want to see. Really, lang.java: class
scheduler brings up my "ms project" mimic concept for java code. I
want to try Python and pythonic coding.

I want code that would list job tasks in a work-week grid and
ultimately drag a block of text to a new location within that week
scheduler if changes were needed. I anticipate XML for my database,
which is what lead me to Python.

Thanks, if somebody out there can offer pointer(s) to an example(s).



From bignose+hates-spam at benfinney.id.au  Tue Sep 18 04:19:41 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 18 Sep 2007 18:19:41 +1000
Subject: super, apply, or __init__ when subclassing?
References: <1190100791.740269.62880@k79g2000hse.googlegroups.com>
Message-ID: <87abrkz8pu.fsf@benfinney.id.au>

"exhuma.twn" <exhuma at gmail.com> writes:

> This is something that keeps confusing me. If you read examples of
> code on the web, you keep on seeing these three calls (super, apply
> and __init__) to reference the super-class. This looks to me as it is
> somehow personal preference. But this would conflict with the "There
> one way to do it" mind-set.
> 
> So, knowing that in python there is one thing to do something, these
> three different calls must *do* domething different. But what exactly
> *is* the difference?
> 
> ------------ Exampel 1: -----------------------------
> 
> class B(A):
>    def __init__(self, *args):
>       A.__init__(self, args)
> 
> ------------ Exampel 2: -----------------------------
> 
> class B(A):
>    def __init__(self, *args):
>       apply( A.__init__, (self,) + args)
> 
> ------------ Exampel 3: -----------------------------
> 
> class B(A):
>    def __init__(self, *args):
>       super(A,self).__init__(*args)

Note that your examples 1 and 3 aren't different *calls*. They are
different ways of *getting at* the same class: either name it
explicitly (as in example 1) or use 'super' to get it for you.

Also, example 3 should instead call 'super(B, self).__init__'. If
you're going to go to the bother of actually *specifying* the class
'A', it's silly to call 'super' to get at it *again*.


The broader picture: I think you're right that this is ridiculously
difficult in Python. The community elders would have us use 'super' to
get at our inherited '__init__', but that doesn't work very well
<URL:http://fuhm.org/super-harmful/> so most people use your example
1.

-- 
 \        "The most merciful thing in the world... is the inability of |
  `\         the human mind to correlate all its contents."  -- Howard |
_o__)                                                Philips Lovecraft |
Ben Finney


From __peter__ at web.de  Wed Sep 19 08:16:09 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 19 Sep 2007 14:16:09 +0200
Subject: UTF-8 characters in doctest
References: <1190202459.229197.297350@n39g2000hsh.googlegroups.com>
Message-ID: <fcr3u9$l32$03$2@news.t-online.com>

Bzyczek wrote:

> So my question is: Is it possible to run doctests with UTF-8
> characters? And if your answer will be YES, tell me please how...

Use raw strings in combination with explicit decoding and a little
try-and-error. E. g. this little gem passes ;)

# -*- coding: utf8 -*-
r"""
>>> f("???".decode("utf8"))
(u'\xe4\xf6\xfc',)
"""
def f(s):
    return (s,)
    
if __name__ == "__main__":
    import doctest
    doctest.testmod()

Peter


From luismgz at gmail.com  Sun Sep 23 21:01:39 2007
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M=2E_Gonz=E1lez?=)
Date: Mon, 24 Sep 2007 01:01:39 -0000
Subject: TRying to import files from my folder not pythons lib folder
In-Reply-To: <mailman.883.1190399436.2658.python-list@python.org>
References: <1190395964.541835.114350@50g2000hsm.googlegroups.com>
	<1190396569.732154.234270@r29g2000hsg.googlegroups.com>
	<mailman.883.1190399436.2658.python-list@python.org>
Message-ID: <1190595699.093793.100960@w3g2000hsg.googlegroups.com>


Steve Holden wrote:
> kyosohma at gmail.com wrote:
> > On Sep 21, 12:32 pm, "tedpot... at gmail.com" <tedpot... at gmail.com>
> > wrote:
> >> Hi,
> >>
> >> I'm trying to create my own lib of functions, but it seems like I can
> >> only import them if they are in pythons lib folder.
> >>
> >> Example
> >> I have a folder called
> >> K:\mypython
> >>
> >> Now in the interactive python shell I type
> >> Import k:\mypython\listall
> >> And get a error on :
> >>
> >> If I store listall.py in pythons lib folder and type
> >> Limport listall
> >>
> >> It works fins.
> >>
> >> Can I create my own library of functions and store them in a separate
> >> dir????
> >>
> >> Also I try to creat a folder in pythomns lib folder and that did not
> >> work
> >>
> >> Help
> >> -Ted
> >
> > One workaround is to do to this:
> >
> > <code>
> >
> > import sys
> > sys.path.append(r'K:\mypython')
> > import listall
> >
> > </code>
> >
> > You can also add your path to the .pth file, but I've never done that,
> > so I can't tell you how.
> >
> > Hope that helps!
> >
> > Mike
> >
> The easiest way, particularly for testing, is to set the PYTHONPATH
> variable. It should be a colon-separated list of directories on Unices,
> and a semi-colon separated list on Windows. Those directories will be
> added to sys.path.
>
> See http://docs.python.org/tut/node8.html for yet more.
>
> regards
>   Steve
>
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd           http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
>
> Sorry, the dog ate my .sigline

This is exactly what I did, but I have a new problem now:
After seting PYTHONPATH I'm no longer able to start IDLE from the
start menu.
It seems the system cannot find the file.
But if I eliminate PYTHONPATH, everything works as it used to.

I set PYTHONPATH because I wanted to import any existing file in my
desktop without having to use sys.path.append...
It works when using the command line but strangely, something get
messed up with IDLE.
Any hint?

Luis



From horpner at yahoo.com  Wed Sep 12 11:25:13 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Wed, 12 Sep 2007 15:25:13 GMT
Subject: Enum class with ToString functionality
References: <1189416537.050002.61120@r34g2000hsd.googlegroups.com>
	<87bqca9hrw.fsf@benfinney.id.au>
	<1189472591.797327.189180@w3g2000hsg.googlegroups.com>
	<13ee5hmhmgr3d14@corp.supernews.com>
Message-ID: <slrnfefmpj.1c4.horpner@FIAD06.norwich.edu>

On 2007-09-11, Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> wrote:
> Perhaps Ben should have followed the usual practice of
> commercial, closed- source software developers and started
> counting his version numbers at one instead of zero, miss a few
> releases, use randomly large increments occasionally, and ended
> up with a current version number of 2.7.1 for the exact same
> level of functionality.
>
> Or he could have called it "Enum XP" (for "eXtra Programming"
> perhaps) or "Enum 2007". The next minor release could be "Enum
> 2008", and the next major update could be called "Enum
> Professional Capowie!!!".

I like the (priviledged) code names adopted by the Linux
community for special versions, e.g., Enum 2.7.1 (Flapjacks).
This would really tie the Enum-using community together, and make
messages about it much cuter.

-- 
Neil Cerutti


From jstroud at mbi.ucla.edu  Fri Sep 14 16:38:05 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 14 Sep 2007 13:38:05 -0700
Subject: why does Configparser change names to lowercase ?
In-Reply-To: <mailman.551.1189800820.2658.python-list@python.org>
References: <mailman.551.1189800820.2658.python-list@python.org>
Message-ID: <fcer2t$jj3$1@daisy.noc.ucla.edu>

stef mientki wrote:
> hello,
> 
> Why does  Configparser change names to lowercase ?

Because it is an annoying module and should be tossed for something 
better? Try this instead (and never look back):

   http://www.voidspace.org.uk/python/configobj.html


> As Python is case sensitive (which btw I don't like at all ;-)
> but now when really need the casesensitivity,
> because it handles about names which should be recognized by human,
> it changes everything to lowercase ????

So you are saying the case sensitivity is a good thing--or maybe you are 
still running Mac System 7 on your CSIIsi marveling at the wonders of HFS?

James


From wizzardx at gmail.com  Wed Sep 19 16:11:08 2007
From: wizzardx at gmail.com (David)
Date: Wed, 19 Sep 2007 22:11:08 +0200
Subject: Removing objects in a list via a wild card
In-Reply-To: <8a6b8e350709191151n31b72bbvc3090031232d5fc8@mail.gmail.com>
References: <8a6b8e350709191151n31b72bbvc3090031232d5fc8@mail.gmail.com>
Message-ID: <18c1e6480709191311k663606a1peabbeffde2e5c705@mail.gmail.com>

On 9/19/07, James Matthews <nytrokiss at gmail.com> wrote:
> Hi List
>
> I have a list of files from my current directory:
>
> import os
>
> files = os.listdir(os.getcwd())
>
> Now this list also includes some files that i don't want like my python
> files... How would i remove them

You can use regular expressions:

import re
files=[file for file in os.listdir(os.getcwd()) if not
re.match('^.+\.((py)|(pyc))$', file)]

You can also use fnmatch:

from fnmatch import fnmatch
files = [file for file in os.listdir(os.getcwd()) if not fnmatch(file,
'*.py') and not fnmatch(file, '*.pyc')]


From gagsl-py2 at yahoo.com.ar  Fri Sep 14 00:53:03 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 14 Sep 2007 01:53:03 -0300
Subject: PIL DPI trouble
References: <BAY113-DAV1B4F4E6832AFBD8872083A3BC0@phx.gbl>
Message-ID: <op.tymnupgxx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 13 Sep 2007 23:50:39 -0300, Gary Bloom <bloominator at hotmail.com>  
escribi?:

> I notice that the PIL has trouble playing with the DPI of other programs  
> and image standards: when I create a file with Paint Shop Pro or  
> Photoshop, the PIL routines can't properly recognize the DPI.

Do you mean that PIL doesn't read the DPI attribute from the file, or  
shows a different value than expected?

> And when I create an image file (via the save method) of PIL, setting  
> the DPI, those same two programs can't read the DPI as set by them.  Is  
> there a workaround for this?

Using which file format?
DPI is just an indication, a reference value. Changing it won't modify the  
image size in pixels, quality or resolution. Maybe you could post some  
sample code showing what you attempt to do.

-- 
Gabriel Genellina



From max at alcyone.com  Sat Sep  1 23:51:05 2007
From: max at alcyone.com (Erik Max Francis)
Date: Sat, 01 Sep 2007 20:51:05 -0700
Subject: How best to dynamically define methods (and functions)?
In-Reply-To: <mailman.288.1188704597.28954.python-list@python.org>
References: <mailman.288.1188704597.28954.python-list@python.org>
Message-ID: <KY-dnfnpZM-0rkfbnZ2dnUVZ_t6onZ2d@speakeasy.net>

Kenneth McDonald wrote:

> I can see an obvious but hacky way to define a Python function at 
> runtime. I can't see any obvious way to add a method to a class at 
> runtime (though I'm sure one could do just about anything by digging 
> into the metaclass stuff, which I will do if needed). But pointers to 
> cleaner or easier existing ways to do this would be most appreciated.
> 
> In case it's of interest in the context of the question, I need to 
> define a largish set of functions (and similar methods) that define a 
> XML-type markup language. Most of these functions will just be of the form
> 
> def fun(...):
>    return Node('fun', ...)
> 
> so it'd definitely be nice to just create most of them automatically, 
> and only do the special cases by hand.

Something like::

	method = ['fun', ...]
	for method in methods:
	    setattr(MyClass, method, lambda *x: Node(method, *x))

The first argument here will be the implicit self, if you don't want 
that, strip off the first argument (or use lambda self, *x: ...).

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   I like young girls. Their stories are shorter.
    -- Thomas McGuane


From nszabolcs at gmail.com  Sat Sep 15 13:15:13 2007
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: Sat, 15 Sep 2007 17:15:13 -0000
Subject: c interfacing in 2.5
In-Reply-To: <5l1qjvF60829U1@mid.uni-berlin.de>
References: <mailman.570.1189846791.2658.python-list@python.org>
	<5l1qjvF60829U1@mid.uni-berlin.de>
Message-ID: <1189876513.594129.136030@g4g2000hsf.googlegroups.com>


Diez B. Roggisch wrote:
> ctypes is for C. Where it is great to use.

if you need simple wrappers then swig and ctypes are both good since
they can generate it for you

pyrex is also good for wrapping and for writing c extension code

> If you need C++-wrapping, I recommend SIP.

i recommend py++ for wrapping c++



From robert.rawlins at thinkbluemedia.co.uk  Mon Sep 24 07:40:07 2007
From: robert.rawlins at thinkbluemedia.co.uk (Robert Rawlins - Think Blue)
Date: Mon, 24 Sep 2007 12:40:07 +0100
Subject: Almost There - os.kill()
In-Reply-To: <002601c7fe9d$52ffb9c0$f8ff2d40$@rawlins@thinkbluemedia.co.uk>
References: <002601c7fe9d$52ffb9c0$f8ff2d40$@rawlins@thinkbluemedia.co.uk>
Message-ID: <003201c7fe9f$a88ff3d0$f9afdb70$@rawlins@thinkbluemedia.co.uk>

Woops,

 

Spoke too soon, just wrapped them in int() and it works a charm :-D

 

Rob

 

From: python-list-bounces+robert.rawlins=thinkbluemedia.co.uk at python.org
[mailto:python-list-bounces+robert.rawlins=thinkbluemedia.co.uk at python.org]
On Behalf Of Robert Rawlins - Think Blue
Sent: 24 September 2007 12:23
To: python-list at python.org
Subject: Almost There - os.kill()

 

Hello Guys,

 

Finally got around to sitting down to tidy up this script this morning but
I'm having a small syntax problem with os.kill() to kill a process on my
system. Here is the code:

 

def killApplication():

 

       pid = file('/var/lock/MyApplication.lock').read().strip()

       

       logging.info('Killing Application Process: %s' % pid)

 

       os.kill(pid, 15)

 

       logging.info('Application %s Killed' % pid)

 

As you can see if rips the PID from the lock file, which works fine as I get
log data which says 'Killing Application Process: 3079' exactly as I would
expect it too. However when I run this script I get the following error:

 

Traceback (most recent call last):

  File "/pblue/new/Alive.py", line 50, in ?

    main()

  File "/pblue/new/Alive.py", line 47, in main

    doCheck()

  File "/pblue/new/Alive.py", line 43, in doCheck

    killApplication()

  File "/pblue/new/Alive.py", line 28, in killApplication

    os.kill(pid, 15)

TypeError: an integer is required

 

Which would suggest its passing those arguments in as the wrong data types
to the kill command. What is the best way to convert these?

 

Thanks guys,

 

Rob

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From zentraders at gmail.com  Sun Sep  2 14:33:50 2007
From: zentraders at gmail.com (Zentrader)
Date: Sun, 02 Sep 2007 11:33:50 -0700
Subject: Pivy problem and some other stuff
In-Reply-To: <5k09ioF1j43jU1@mid.uni-berlin.de>
References: <1188501707.593319.23330@m37g2000prh.googlegroups.com>
	<5jom54Fh543U2@mid.uni-berlin.de>
	<13df1kmak87mbb@corp.supernews.com>
	<1188743700.872880.21960@o80g2000hse.googlegroups.com>
	<5k09ioF1j43jU1@mid.uni-berlin.de>
Message-ID: <1188758030.280527.40150@g4g2000hsf.googlegroups.com>

> What meaningless error message are you talking about!?
>
> Ciao,
>         Marc 'BlackJack' Rintsch

My mistake.  It appears that this is no longer the case.  And my
apologies.  It was probably in version 2.3 or earlier that this was a
problem.  Given the way that the Python community constantly improves
the language, I should have checked first, but "shoulds" don't count.



From kyosohma at gmail.com  Thu Sep 13 10:08:14 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 13 Sep 2007 07:08:14 -0700
Subject: wx.ToplevelWindow.SetIcon: Native MS Windows error dialog pops up
	in wxPython app, no exception raised, no stack trace
In-Reply-To: <mailman.484.1189691086.2658.python-list@python.org>
References: <mailman.479.1189682950.2658.python-list@python.org>
	<1189689558.938858.43970@g4g2000hsf.googlegroups.com>
	<mailman.484.1189691086.2658.python-list@python.org>
Message-ID: <1189692494.658078.247350@22g2000hsm.googlegroups.com>

On Sep 13, 8:41 am, Laszlo Nagy <gand... at shopzeus.com> wrote:
> > See main.py of the Demo, line 1129. img2py is in the following default
> > location:
> > C:\Python24\Lib\site-packages\wx-2.8-msw-unicode\wxPython\tools
>
> > Without seeing how you create the image, it's hard to troubleshoot,
> > but I would guess that you have an absolute path that you're using in
> > your script that is different than what the exe is looking for.
>
> I actually do have a wx.Icon instance loaded from a file. This problem
> is not about loading a file into a wx.Icon instance. This why I'm
> suprised about the message ("cannot load image file"). I already have
> both the icon and the top level window in memory. If I comment out the
>
> self.SetIcon(icon)
>
> line in my code then there is no error message (and no icon on the
> frame). The SetIcon method will call the Windows API at the end, and it
> has nothing to do with files. It accepts a window handle and a pointer
> to an icon resource. I cannot think about anything that would need to
> read from a file while setting the icon of the frame.  Moreover, the
> icon is showing on the frame, looks like there is no error, so why am I
> getting a message? It is not a python Exception, it pops out from
> nowhere. :-) I suspect it will be an internal error in wxWidgets or
> wxPython. But their mailing list is not working. :-(
>
> Thanks anyway.
>
>    Laszlo

I'm told the mailing list is now up. Sorry I wasn't more helpful.

Mike



From nick at craig-wood.com  Thu Sep 20 05:30:16 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Thu, 20 Sep 2007 04:30:16 -0500
Subject: [Tutor] Finding prime numbers
References: <1190218927.7991.25.camel@apprentice-laptop>
	<82b4f5810709190931u16ee0621xc6608d2bcb2fec5e@mail.gmail.com>
	<1190219929.7991.28.camel@apprentice-laptop>
	<mailman.776.1190222010.2658.python-list@python.org>
Message-ID: <slrnff4cql.dv5.nick@irishsea.home.craig-wood.com>

Shawn Milochik <Shawn at Milochik.com> wrote:
>  Any improvements anyone?

  >>> import gmpy
  >>> for x in range(3,1000,2):
  ...     if gmpy.is_prime(x):
  ...             print x,"is prime"
  ...
  3 is prime
  5 is prime
  7 is prime
  [...]
  >>> gmpy.is_prime(2**607-1)
  1
  >>> gmpy.is_prime(2**608-1)
  0

Cheating perhaps!  Note is_prime will be a probabalistic test for
large numbers...

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


From zzbbaadd at aol.com  Fri Sep 28 14:44:06 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Fri, 28 Sep 2007 11:44:06 -0700
Subject: Python 3.0 migration plans?
In-Reply-To: <mailman.1244.1191003680.2658.python-list@python.org>
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<1190968707.799398.232550@19g2000hsx.googlegroups.com>
	<5m4126FbgjabU1@mid.uni-berlin.de>
	<1190993122.979034.305060@50g2000hsm.googlegroups.com>
	<mailman.1236.1190995515.2658.python-list@python.org>
	<1190997769.002795.59450@57g2000hsv.googlegroups.com>
	<5m4qc2Fbbk19U1@mid.uni-berlin.de>
	<1191000394.828693.285210@k79g2000hse.googlegroups.com>
	<mailman.1239.1191002287.2658.python-list@python.org>
	<1191002679.569709.16870@22g2000hsm.googlegroups.com>
	<mailman.1244.1191003680.2658.python-list@python.org>
Message-ID: <1191005046.213630.13340@57g2000hsv.googlegroups.com>

On Sep 28, 11:21 am, "Francesco Guerrieri" <f.guerri... at gmail.com>
wrote:
> On 9/28/07, TheFlyingDutchman <zzbba... at aol.com> wrote:
>
> > On Sep 28, 10:57 am, Steve Holden <st... at holdenweb.com> wrote:
> > > This is like listening to a four-year-old torment its parents with
> > > incessant questions. Do you *have* to ask every question that pops into
> > > your mind?
>
> > In this case I asked it as part of the original question and it was
> > ignored. I have programmed in C and C++ and a little Pascal many years
> > ago. I don't remember anything about Higher Order Functions and would
> > like to see exactly how you do it and to verify the contention.
>
> You could just google for it. Just in case your connection to google
> or other similar search engines has been disabled for some reason,
> here are some links.
>
> Try for instance
>
> http://okmij.org/ftp/c++-digest/Lambda-CPP-more.html#Ex3
>
> or
>
> http://www.cc.gatech.edu/~yannis/fc++/
>
> or
>
> http://www.boost.org/libs/mpl/doc/tutorial/higher-order.html
>
Correct me if I am wrong, but none of those examples showed something
in C++ similar to a decorator in Python - that is, unique syntax in
the language for implementing a Higher Order Function. One thing I
will say about those examples is that they make Python decorators look
sweet!



From steve at holdenweb.com  Tue Sep 11 18:09:52 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 11 Sep 2007 18:09:52 -0400
Subject: Difference between two times (working ugly code, needs polish)
In-Reply-To: <2dc0c81b0709111420r453ac15av6c7aa19473785080@mail.gmail.com>
References: <mailman.405.1189543618.2658.python-list@python.org>	<13ee01cfc7f4be2@corp.supernews.com>
	<2dc0c81b0709111420r453ac15av6c7aa19473785080@mail.gmail.com>
Message-ID: <fc73nf$gcq$1@sea.gmane.org>

Shawn Milochik wrote:
> On 9/11/07, Grant Edwards <grante at visi.com> wrote:
>> On 2007-09-11, Shawn Milochik <Shawn at Milochik.com> wrote:
>>
>>> I have done what I wanted, but I think there must be a much better way.
>> See the strptime() function in either the time or the datetime
>> modules:
>>
>> http://docs.python.org/lib/module-time.html
>> http://docs.python.org/lib/module-datetime.html
>>
> 
> 
> Grant:
> 
> Thanks, this works, and is much shorter. Any further improvements, anyone?
> 
> def isOld(lastUpdate, runTimeStamp):
> 
>    oneDay = 60 * 60 * 24
> 
>    lastUpdate = time.mktime(time.strptime(lastUpdate, "%Y-%m-%d_%H:%M"))
>    runTimeStamp = time.mktime(time.strptime(runTimeStamp, "%Y-%m-%d_%H:%M"))
> 
>    return (runTimeStamp - lastUpdate) / oneDay

I suppose really oneDay should be a global (i.e. outside the function 
definition). Apart from that it would be hard to improve on: obvious, 
easy to read, in short - pythonic.

Are you concerned about daylight savings? That could certainly introduce 
a whole new level of complexity into the problem. Let's hope not ...


-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From python at hope.cz  Wed Sep 26 01:10:24 2007
From: python at hope.cz (Johny)
Date: Tue, 25 Sep 2007 22:10:24 -0700
Subject: HTTPS request
In-Reply-To: <RfWdncfv3JRWqWTbnZ2dnUVZ_qfinZ2d@comcast.com>
References: <1190730718.341771.215970@19g2000hsx.googlegroups.com>
	<RfWdncfv3JRWqWTbnZ2dnUVZ_qfinZ2d@comcast.com>
Message-ID: <1190783424.545615.297540@o80g2000hse.googlegroups.com>

On Sep 25, 6:17 pm, Larry Bates <larry.ba... at websafe.com> wrote:
> Johny wrote:
> > If I need to log in to a site using https protocol must I use
> > certification file and key file?
> > The class HTTPSConnection syntax is
> > class HTTPSConnection( host[, port, key_file, cert_file])
>
> > and I do not know if it is nescessary or not.
> > Thanks for help.
> > L.
>
> Depends on what the server requires.  You can do basic authenticate to a https:
> site if it supports it.
>
> -Larry

Hello Larry,
Thanks for your reply.
I had to register on this site, so I have Login and Password.
I can log in to the site through normal process on the server(by
filling in the login form).
But I can not login to the site from my Python program.
I use the same procedure as I do for other webservers that require
login information. The only difference is that the server, this time,
is HTTPS server.
So I do not know if I must use a SSL certificate or not and if I can
use HTTP 1.0 or I must use HTTP 1.1 protocol.
Any idea?
Thanks
L.



From gregpinero at gmail.com  Wed Sep  5 22:50:01 2007
From: gregpinero at gmail.com (gregpinero at gmail.com)
Date: Thu, 06 Sep 2007 02:50:01 -0000
Subject: Give List to Format String - How To
In-Reply-To: <1189046828.313284.235210@o80g2000hse.googlegroups.com>
References: <1189046828.313284.235210@o80g2000hse.googlegroups.com>
Message-ID: <1189047001.963262.276790@w3g2000hsg.googlegroups.com>

On Sep 5, 10:47 pm, "gregpin... at gmail.com" <gregpin... at gmail.com>
wrote:
> I might just be being dumb tonight, but why doesn't this work:
>
> >>> '%s aaa %s aa %s' % ['test' for i in range(3)]
>
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> TypeError: not enough arguments for format string
>

Ah it just needs a tuple.  I posted too soon I guess.

>>> '%s aaa %s aa %s' % tuple(['test' for i in range(3)])
'test aaa test aa test'

-Greg




From gnn at neville-neil.com  Mon Sep 24 06:30:50 2007
From: gnn at neville-neil.com (George V. Neville-Neil)
Date: Mon, 24 Sep 2007 11:30:50 +0100
Subject: Properties and Objects...
In-Reply-To: <op.ty4nf2arx6zn5v@a98gizw.cpe.telecentro.net.ar>
References: <m24phm7exd.wl%gnn@neville-neil.com>
	<op.ty4nf2arx6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <m2bqbs5p9h.wl%gnn@neville-neil.com>

At Sun, 23 Sep 2007 19:01:04 -0300,
Gabriel Genellina wrote:
> 
> En Sat, 22 Sep 2007 15:06:38 -0300, George V. Neville-Neil  
> <gnn at neville-neil.com> escribi?:
> 
> > I have been trying to switch this over to using properties, which seem
> > at first glance to be cleaner, but which I am having a lot of problems
> > with.  In particular I want to add a property to an object, not a
> > class.  The field list in a class is actually relatively static but I
> > wind up with ugly code like:
> >
> > class ethernet(pcs.Packet):
> >     """Ethernet"""
> >     __layout__ = pcs.Layout()
> >     _map = ethernet_map.map
> >    src = pcs.StringField("src", 48)
> >     dst = pcs.StringField("dst", 48)
> >     type = pcs.Field("type", 16)
> >
> >     def __init__(self, bytes = None, timestamp = None):
> >         """initialize an ethernet packet"""
> >
> >         src = pcs.StringField("src", 48)
> >         dst = pcs.StringField("dst", 48)
> >         type = pcs.Field("type", 16)
> >
> >         pcs.Packet.__init__(self, [dst, src, type], bytes = bytes)
> >         self.description = inspect.getdoc(self)
> 
> You don't have to repeat the fields:
> 
>           pcs.Packet.__init__(self, [self.dst, self.src, self.type], bytes  
> = bytes)
> 

Actually that calls the __get__ method of the descriptor, which is not
what I want, I need a list of the objects in the layout.

> does the same thing.
> And you can remove self.description=... and use (at the class level):
> 	description = __doc__
> or:
> 	description = property(lambda self: self.__doc__)
> to automatically enable subclases to share the definition

Ah, that's very cool, thanks.

> One could say that the field order is important so I'd finally write it as:
> 
> class ethernet(pcs.Packet):
>       """Ethernet"""
>       __layout__ = pcs.Layout()
>       _map = ethernet_map.map
>       src = pcs.StringField("src", 48)
>       dst = pcs.StringField("dst", 48)
>       type = pcs.Field("type", 16)
>       _fields = [dst, src, type]
>       description = property(lambda self: self.__doc__)
> 
>       def __init__(self, bytes = None, timestamp = None):
>           """initialize an ethernet packet"""
> 
>           pcs.Packet.__init__(self, self._fields, bytes = bytes)
> 
> > and assigning the properties at class time means that it's hard to
> > have variations, packets with the same name but with slightly varying
> > field lists.
> 
> This is the part I don't understand. Can't you define a new class, in case  
> you want a different field list? Using the above class:
> 
> class ethernet_modified(ethernet):
>      """Modified ethernet class"""
>      added_field = pcs.StringField("whatever", 16)
>      _fields = [dst, src, type, added_field]
> 
> And it doesn't even requiere an __init__ method
> 

Yes, I could and probably should define different objects.

> > So, is there a way to assign a property to an object, like this:
> >
> >     def __init__(....
> >          self.src = property()
> >
> > or something like that?
> 
> I'd use different classes for different kind of objects.
> 
> > And, failing that, is there a clean way to modify the class in it's
> > __init__() method so I don't have to call the Field objects twice,
> > once for the property effect and once to put into the list in the base
> > Packet class?
> 
> I think my example above does what you want.

Other than the fact that I need the list of Field objects in the
layout, and not the values, yes.  Of course that's the hard part.

Thanks,
George


From david.barr456 at btinternet.com  Thu Sep  6 15:18:24 2007
From: david.barr456 at btinternet.com (David Barr)
Date: Thu, 06 Sep 2007 20:18:24 +0100
Subject: Beginners Query - Simple counter problem
In-Reply-To: <13e0g0id9rlmg71@corp.supernews.com>
References: <WZidnbvgAJstpX3bRVnytgA@bt.com>
	<13e0g0id9rlmg71@corp.supernews.com>
Message-ID: <nKmdnYzeU_-pz33bRVnyjwA@bt.com>

Scott David Daniels wrote:
> David Barr wrote:
>> I am brand new to Python (this is my second day), and the only 
>> experience I have with programming was with VBA.  Anyway, I'm posting 
>> this to see if anyone would be kind enough to help me with this (I 
>> suspect, very easy to solve) query.
>>
>> The following code is in a file which I am running through the 
>> interpreter with the execfile command, yet it yeilds no results.  I 
>> appreciate I am obviously doing something really stupid here, but I 
>> can't find it.  Any help appreciated.
>>
>>
>> def d6(i):
>>     roll = 0
>>     count = 0
>>     while count <= i:
>>         roll = roll + random.randint(1,6)
>>         count += 1
>>
>>     return roll
>>
>> print d6(3)
> A) your direct answer: by using <=, you are rolling 4 dice, not 3.
> B) Much more pythonic:
> 
> import random
> 
> def d6(count):
>     result = 0
>     for die in range(count):
>         result += random.randint(1, 6)
>     return result
> 
> -Scott David Daniels
> Scott.Daniels at Acm.Org

I was surprised by the speed and number of posts.  Thanks for the 
solutions provided!

 >>> def roll(times=1, sides=6):
...     return random.randint(times, times*sides)

Although this would probably be quicker than the other approaches, I'm 
not using the dice to generate numbers per say, I actually want to 
emulate the rolling of dice, bell-curve (normal distribution) as well as 
the range.

Thanks again, I already like what (very) little I can do in Python and 
it seems to have a great community too.

Cheers,
Dave.


From alexandre.badez at gmail.com  Tue Sep 25 08:08:02 2007
From: alexandre.badez at gmail.com (Alexandre Badez)
Date: Tue, 25 Sep 2007 12:08:02 -0000
Subject: Raw string printing
Message-ID: <1190722082.406690.222540@57g2000hsv.googlegroups.com>

Hy !

I would like to do something like:

s = r"a\tb\n"

print s
# result with
a\tb\n

print unraw(s) # <= this is the "magic" function I'm searching for
# result with
a    b
n

Does any of you know how to do it properly ?



From BjornSteinarFjeldPettersen at gmail.com  Wed Sep 12 06:28:22 2007
From: BjornSteinarFjeldPettersen at gmail.com (thebjorn)
Date: Wed, 12 Sep 2007 10:28:22 -0000
Subject: An ordered dictionary for the Python library?
In-Reply-To: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
Message-ID: <1189592902.742636.3910@22g2000hsm.googlegroups.com>

On Sep 12, 9:33 am, Mark Summerfield <m.n.summerfi... at googlemail.com>
wrote:
> I feel that Python lacks one useful data structure: an ordered
> dictionary.
>
> I find such data structures v. useful in C++. I know that in Python
> the sort function is v. fast, but often I prefer never to sort but
> simply to use an ordered data structure in the first place.
> (I'm aware that for ordered lists I can use the bisect module, but I
> want an ordered key-value data structure.)
[...]
> Do other Python programmers feel this lack? Is this worth a PEP?

I usually make a distinction between a sorted dict, where iteration
(and potentially positional indexing) happens in sorted key order; and
an ordered dict where items maintain insertion order. I use the latter
all the time, and e.g. Django's model metaclass does some minor magic
to overcome the fact that field-order is lost by the time your
metaclass gets control, since the attributes are passed as a regular
dict.

-- bjorn



From steve at holdenweb.com  Sat Sep  1 03:04:06 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 01 Sep 2007 03:04:06 -0400
Subject: Automation and scheduling of FrontPage publishing using Python
In-Reply-To: <fbb1lr$evf$5@lust.ihug.co.nz>
References: <1188517723.279932.299400@x40g2000prg.googlegroups.com>	<fbamnh$r7q$7@lust.ihug.co.nz>	<mailman.250.1188620292.28954.python-list@python.org>
	<fbb1lr$evf$5@lust.ihug.co.nz>
Message-ID: <fbb2t9$3co$1@sea.gmane.org>

Lawrence D'Oliveiro wrote:
> In message <mailman.250.1188620292.28954.python-list at python.org>, Steve
> Holden wrote:
> 
>> Lawrence D'Oliveiro wrote:
>>
>>> In message <1188517723.279932.299400 at x40g2000prg.googlegroups.com>,
>>> andrew.arobert at gmail.com wrote:
>>>
>>>> We have numerous web sites which are currently being manually
>>>> published via Front Page.
>>>>
>>>> Doing one or two sites on an ad-hoc basis was not too bad but we are
>>>> now over 20 or thirty at set times during a business day.
>>> Let me open the bidding by suggesting that you stop using FrontPage.
>> But that would mean reprogramming the functionality they now implement
>> using FrontPage extensions. Any help with that?
> 
> If they were using FrontPage extensions, they deserve everything they get.

While possibly justifiable, given that FrontPage has had holes you could 
drive a London double-decker but through since time immemorial, it isn't 
a terribly helpful observation. And they clearly *are* using FrontPage 
extensions, since the OP states that rsync and RoboCopy leave "the front 
page extensions and navigation/etc [...] broken".

Not everyone reads the literature even well enough to know about 
well-known problems like FrontPage. Whether such ignorance deserves to 
be punished by such open-ended retribution is arguable, and I think I'd 
come down on the "no" side.

The only mistake they made was trusting the vendor to provide secure 
solutions ...

[Andrew: sorry to drag you into this discussion - I don't know whether 
you were aware of FrontPage's security issues or not. If not, you should 
certainly think about reading up on them].

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From mail at timgolden.me.uk  Thu Sep  6 11:57:29 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 06 Sep 2007 16:57:29 +0100
Subject: Finding specific date ranges
In-Reply-To: <1189090603.285778.282060@g4g2000hsf.googlegroups.com>
References: <1189090603.285778.282060@g4g2000hsf.googlegroups.com>
Message-ID: <46E02369.6020504@timgolden.me.uk>

kyosohma at gmail.com wrote:
> Hi,
> 
> I am working on a timesheet application in which I need to to find the
> first pay period in a month that is entirely contained in that month
> to calculate vacation time. Below are some example date ranges:
> 
> 
> December 31, 2006    January 13, 2007 # doesn't earn
> January 14, 2007	January 27, 2007 # does earn
> January 28, 2007	February 10, 2007 # doesn't
> February 11, 2007	February 24, 2007 # does
> 
> 
> So far, the best approach I've come up with is to create a list of
> tuples that contain the pay period date ranges for the year and
> iterate through the tuples looking for the first occurrence of the
> month names matching. Then I'd add that date range to a separate list
> and somehow ignore any other matches in that month. This seems like a
> hack. Does anyone have a better idea?


Well, I can come up with a solution which basically reflects the
way I'd do it in SQL (since this kind of thing is my bread-and-butter
there) but I'm not convinced it's really any better than your proposal.
However, for the purposes of illustration:

<code>
import calendar
import datetime

YEAR = 2007

months = [
   (datetime.date (YEAR, n, 1), datetime.date (YEAR, n, calendar.monthrange (YEAR, n)[1]))
   for n in range (1, 13)
]

periods = [
   (datetime.date(2006, 12, 31), datetime.date(2007, 1, 13)),
   (datetime.date(2007, 1, 14), datetime.date(2007, 1, 27)),
   (datetime.date(2007, 1, 28), datetime.date(2007, 2, 10)),
   (datetime.date(2007, 2, 11), datetime.date(2007, 2, 24))
]

for m in months:
   candidate_periods = [p for p in periods if m[0] <= p[0] and p[1] <= m[1]]
   if candidate_periods:
     print m[0], "=>", min (candidate_periods)
   else:
     print m[0], "=>", "no period matches"

</code>

TJG


From liangxuliang79 at gmail.com  Thu Sep  6 09:28:50 2007
From: liangxuliang79 at gmail.com (liang xuliang)
Date: Thu, 6 Sep 2007 21:28:50 +0800
Subject: ??????urllib post????????????
In-Reply-To: <20070906024041.GA6599@gmail.com>
References: <1188993813.330662.174660@w3g2000hsg.googlegroups.com>
	<20070906024041.GA6599@gmail.com>
Message-ID: <b5feee560709060628k607335acue11cae0efb0de62e@mail.gmail.com>

Can you speak clearly ? I don't know how to do that .

Thanks
Liang Xuliang

2007/9/6, O.R.Senthil Kumaran <orsenthil at gmail.com>:
>
> If possible, please post your query in ASCII.
>
> --
> Senthil
>
>
> * liangxuliang79 at gmail.com <liangxuliang79 at gmail.com> [2007-09-05
> 05:03:33]:
>
> > ????www.mmmppp333.com??????????http://ishare.iask.sina.com.cn/cgi-bin/
> > fileid.cgi?fileid=844050
> > ??????post fileid=844050????????
> >
> >
> ????post????????????fileid=844050??????server??????????header??header????local????location????
> >
> ??????????????????????????????????????????????mp3????????????????????????????local????????????mp3??????????????????????????????????
> > ??????????????????????????????
> >
> >
> ??????????????python??urllib????????urllib???????????????????????local????????????????local????????mp3????????
> > ????????????????mp3.??
> >
> > ??post????????/download.php??
> post????????fileid=844050????????????????????????????????????????????????????
> > ????????????????????web??????????????????????
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> --
> O.R.Senthil Kumaran
> http://uthcode.sarovar.org
>
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From rzantow at gmail.com  Sun Sep  2 09:36:45 2007
From: rzantow at gmail.com (rzed)
Date: Sun, 02 Sep 2007 13:36:45 +0000
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
Message-ID: <Xns999F61C8910Arzantowgmailcom@208.49.80.253>

jwrweatherley at gmail.com wrote in
news:1188733902.513512.87510 at r34g2000hsd.googlegroups.com: 

> The puzzle is: p is the perimeter of a right angle triangle with
> integral length sides, {a,b,c}. which value of p  < 1000, is the
> number of solutions {a,b,c} maximised?
> 
> Here's my python code:
> 
> #!/usr/local/bin/python
> 
> solutions = [0] * 1001
> p = 0
> 
> for a in xrange(1, 1000):
>     for b in xrange(1, 1000 - a):
>         for c in xrange(1, 1000 - a - b):
>             p = a + b + c
>             if p < 1000:
>                 if a ** 2 + b ** 2 == c ** 2:
>                     solutions[p] += 1
>

Once p >= 1000, it ain't goin' back. If you break out of the 
innermost loop here after that happens, you'll save a bunch of 
time.
 
> max = 0
> maxIndex = 0
> index = 0
> for solution in solutions:
>     if solution > max:
>         max = solution
>         maxIndex = index
>     index += 1
> 
> print maxIndex
> 
> 
> It takes 2 minutes and twelve seconds on a 2.4GHz Core2Duo
> MacBook Pro.
>
[...]
 
> The resulting executable takes 0.24 seconds to run. I'm not
> expecting a scripting language to run faster than native code,
> but I was surprised at how much slower it was in this case. Any
> ideas as to what is causing python so much trouble in the above
> code? 
> 



From l.oluyede at gmail.com  Mon Sep  3 05:06:11 2007
From: l.oluyede at gmail.com (Lawrence Oluyede)
Date: Mon, 03 Sep 2007 09:06:11 -0000
Subject: TypeError: 'module object is not callable'
In-Reply-To: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
Message-ID: <1188810371.354170.298510@w3g2000hsg.googlegroups.com>

On Sep 3, 10:48 am, christophert... at hotmail.com wrote:
> Hi
>
> I am new to Python and have recieved this error message when trying to
> instantiate an object from a class from another file within the same
> directory and wondered what I have done wrong.
>
> I have a Step.py class:
> class Step(object)
>         def __init__(self, sName):
>         "Initialise a new Step instance"
>         self.sName = sName
>         self.depSteps = []
>         self.remDepSteps = []
>         self.isCompleted = 0
>
> Then I have created a new file within the same directory called
> main.py:
>
> import Step
> a  = Step("magn")
>
> The following however generates the error
> Traceback (most recent call last):
>   File "main.py", line 3, in ?
>     a  = Step("magn")
> TypeError: 'module' object is not callable

This is because when you issue "import Step" you're actually importing
the "Step" _module_, not the "Step" class inside the module.

You can do this in at least two ways:

------
import Step
a = Step.Step("magn") # access the Step class inside Step module
------

or

------
from Step import Step # insert in the current namespace the Step class
a = Step("magn")
------

>
> If anyone could help point me in the right direction, how to fix this
> problem it would be much appreciated.
> Chris

HTH



From marvinware2005 at gmail.com  Sat Sep 29 16:32:15 2007
From: marvinware2005 at gmail.com (marvinla)
Date: Sat, 29 Sep 2007 13:32:15 -0700
Subject: How to unload a module after I've imported it.
In-Reply-To: <1191096194.002683.16240@50g2000hsm.googlegroups.com>
References: <1191096194.002683.16240@50g2000hsm.googlegroups.com>
Message-ID: <1191097935.819936.148950@50g2000hsm.googlegroups.com>

Have you tried a del?

>> import socket
>> dir()
['__builtins__', '__doc__', '__name__', 'socket']
>> del socket
>> dir()
['__builtins__', '__doc__', '__name__']

See you!



From rvp74 at ua.fm  Sun Sep 16 12:42:37 2007
From: rvp74 at ua.fm (Vadim Radionov)
Date: Sun, 16 Sep 2007 19:42:37 +0300
Subject: generate list of partially accumulated values
In-Reply-To: <1189936564.932553.148800@50g2000hsm.googlegroups.com>
References: <1189936564.932553.148800@50g2000hsm.googlegroups.com>
Message-ID: <newscache$fczgoj$fde$1@hell.sed.lg.ua>

cesco ?????:
> Hi,
> 
> I have the following list:
> l = [1, 2, 3, 4]
> and I'd like to obtain a list like the following:
> l_partial_sum = [1, 3, 6, 10] (that is [1, 1+2, 1+2+3, 1+2+3+4])

 >>> def iscan(f, seq, acc=0):
...     for i in seq:
...        acc = f(acc,i)
...        yield acc
...
 >>> list(iscan(operator.add, xrange(1,5)))
[1, 3, 6, 10]
 >>>




From bjourne at gmail.com  Mon Sep 17 00:44:14 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Mon, 17 Sep 2007 06:44:14 +0200
Subject: Needless copying in iterations?
In-Reply-To: <13epv3fnb6bak15@corp.supernews.com>
References: <fchk59$mm3$1@daisy.noc.ucla.edu>
	<5l3ab6F5v20uU3@mid.uni-berlin.de>
	<13eourdrne86e61@corp.supernews.com> <874phv42to.fsf@benfinney.id.au>
	<13epv3fnb6bak15@corp.supernews.com>
Message-ID: <740c3aec0709162144g21cb44b2i53b1bebff8a42c9d@mail.gmail.com>

On 9/16/07, Steven D'Aprano <steve at remove-this-cybersource.com.au> wrote:
> Maybe I'm being unfair, but it seems to me that the attitude is similar:
> 'there's no point optimizing the common case of printing (say) ints
> stored in a list, Just In Case the programmer wants the incredibly rare
> case of setting sys.stdout to some wacky object that modifies the list
> he's iterating over. It could happen.'

Indeed, there is no point in optimizing printing of lists as IO is
orders of magnitudes slower than Python.

But psyco probably would make a best effort attempt.

-- 
mvh Bj?rn


From kay.schluehr at gmx.net  Wed Sep  5 16:31:14 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Wed, 05 Sep 2007 13:31:14 -0700
Subject: Any syntactic cleanup likely for Py3? And what about doc
	standards?
In-Reply-To: <mailman.112.1189022368.2658.python-list@python.org>
References: <46DEFD2E.5050205@sbcglobal.net>
	<mailman.112.1189022368.2658.python-list@python.org>
Message-ID: <1189024274.627827.285050@o80g2000hse.googlegroups.com>

On Sep 5, 9:59 pm, Ferenczi Viktor <pyt... at cx.hu> wrote:

> Class decorators allows clean implementation of properties.
> Detailed description:http://www.python.org/dev/peps/pep-3129/
> Lets use a hypothetic library providing properties, for example:
>
> from property_support import hasProperties, Property
>
> @hasProperties
> class Sphere(object):
>     def setRadius(self, value):
>         ... some setter implementation ...
>     radius=Property(default=1.0, set=setRadius, type=(int, float))
>     color=Property(default='black', allowNone=True)
>
> This is a cleaner syntax if you need automatic default setter/getter
> implementations with type checking, default values, etc.

I really distaste this "etc." in your description. In the end you
promote endless lists of command line parameters to configure every
possible function. I also doubt that the solution is more clean but
arbitray instead.

My own guess why properties are not promoted with more emphasis is
that they lead to cargo cult programming i.e. everyone starts to use
property syntax even when usual attributes are sufficient. So the
syntax might even be intentionally ugly.



From freesoftwareweb at gmail.com  Tue Sep 18 15:02:20 2007
From: freesoftwareweb at gmail.com (freesoftwareweb at gmail.com)
Date: Tue, 18 Sep 2007 12:02:20 -0700
Subject: Free software!!!!
Message-ID: <1190142140.116407.25240@n39g2000hsh.googlegroups.com>

http://freesoftwareupgrades.blogspot.com/



From spam.noam at gmail.com  Mon Sep 17 19:14:56 2007
From: spam.noam at gmail.com (spam.noam at gmail.com)
Date: Mon, 17 Sep 2007 23:14:56 -0000
Subject: How can I know how much to read from a subprocess
Message-ID: <1190070896.332844.23080@22g2000hsm.googlegroups.com>

Hello,

I want to write a terminal program in pygtk. It will run a subprocess,
display everything it writes in its standard output and standard
error, and let the user write text into its standard input.

The question is, how can I know if the process wrote something to its
output, and how much it wrote? I can't just call read(), since it will
block my process.

Thanks,
Noam



From toby at tobiah.org  Thu Sep 20 16:12:08 2007
From: toby at tobiah.org (Tobiah)
Date: Thu, 20 Sep 2007 13:12:08 -0700
Subject: Python Regex Question
In-Reply-To: <1190316811.760038.145850@50g2000hsm.googlegroups.com>
References: <1190316811.760038.145850@50g2000hsm.googlegroups.com>
Message-ID: <46f2c7e8$0$21956$88260bb3@free.teranews.com>

joemystery123 at gmail.com wrote:
> I need to extract the number on each <td tags from a html file.
> 
> i.e 49.950 from the following:
> 
> <td align=right width=80><font size=2 face="New Times
> Roman,Times,Serif">&nbsp;49.950&nbsp;</font></td>
> 
> The actual number between: &nbsp;49.950&nbsp; can be any number of
> digits before decimal and after decimal.
> 
> <td align=right width=80><font size=2 face="New Times
> Roman,Times,Serif">&nbsp;######.####&nbsp;</font></td>
> 
> How can I just extract the real/integer number using regex?
> 


'[0-9]*\.[0-9]*'

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



From wizzardx at gmail.com  Sat Sep  8 17:25:17 2007
From: wizzardx at gmail.com (David)
Date: Sat, 8 Sep 2007 23:25:17 +0200
Subject: Parsing nested constructs
In-Reply-To: <46e308d3$0$9153$426a74cc@news.free.fr>
References: <46e308d3$0$9153$426a74cc@news.free.fr>
Message-ID: <18c1e6480709081425v162d7fa4r8e91d66d3fb7dc@mail.gmail.com>

On 9/8/07, tool69 <kib2 at free.fr> wrote:
> Hi,
>
> I need to parse some source with nested parenthesis, like this :
>

If this is exactly how your data looks, then how about a loop which
searches for "{item" and the following "}"? You can use the "find"
string method for that.

Otherwise, if the items don't look exactly like "{item", but the
formatting is otherwise exactly the same as above, then look for lines
that have both "{" and "}" on them, then get the string between them.

Otherwise, if { and } and the item aren't always on the same line,
then go through the string character by character, keep track of when
you encounter "{" and "}". When you encounter a "}" and there was a
"{" before (ie, not a "}"), then get the string between the "{" and
the "}"


From steve at REMOVE-THIS-cybersource.com.au  Mon Sep 10 19:02:52 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Mon, 10 Sep 2007 23:02:52 -0000
Subject: How do I read and write to the same CSV file
References: <1189434466.001109.313060@d55g2000hsg.googlegroups.com>
	<13ean2c2ip6i153@corp.supernews.com>
Message-ID: <13ebj8skp1fracf@corp.supernews.com>

On Mon, 10 Sep 2007 15:01:32 +0000, Steven D'Aprano wrote:

> But if you insist... you might be able to use cf_stream.seek() to move
> to the current position in the file, then write the bytes you want. How
> do you find the current position? Black magic or voodoo might help.

<slaps head>

Well, that'll learn me to post at ungodly hours of the morning. Getting 
the _current_ position is easy, what I meant to write was CORRECT 
position. Twice.

How embarrassment.


-- 
Steven.




From Michael.J.Fromberger at Clothing.Dartmouth.EDU  Mon Sep 24 09:08:43 2007
From: Michael.J.Fromberger at Clothing.Dartmouth.EDU (Michael J. Fromberger)
Date: Mon, 24 Sep 2007 09:08:43 -0400
Subject: sorting a list numbers stored as strings
References: <1190632366.863711.100680@y42g2000hsy.googlegroups.com>
Message-ID: <Michael.J.Fromberger-91BBD7.09084224092007@localhost>

In article <1190632366.863711.100680 at y42g2000hsy.googlegroups.com>,
 aine_canby at yahoo.com wrote:

> hi,
> 
> I have the following list -
> 
> ["1", "11", "2", "22"]
> 
> how do I sort it like this -
> 
> ["1", "2", "11", "22"]
> 
> thanks,
> 
> aine

Try:

  lst.sort(key = lambda s: int(s))

Assuming, of course, that "lst" is your original list; this will sort it 
in place.  Also, you should probably read about the "sorted" function 
here:

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

Cheers,
-M

-- 
Michael J. Fromberger             | Lecturer, Dept. of Computer Science
http://www.dartmouth.edu/~sting/  | Dartmouth College, Hanover, NH, USA


From tjreedy at udel.edu  Wed Sep  5 15:43:38 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 5 Sep 2007 15:43:38 -0400
Subject: Any syntactic cleanup likely for Py3? And what about doc
	standards?
References: <46DEFD2E.5050205@sbcglobal.net>
Message-ID: <fbn0t7$74c$1@sea.gmane.org>


"Kenneth McDonald" <kenneth.m.mcdonald at sbcglobal.net> wrote in message 
news:46DEFD2E.5050205 at sbcglobal.net...
| The reading I've done so far on Python 3 (alpha announcement, meta-PEP,
| some other PEPs) is generally encouraging, but there doesn't seem to be
| much on cleaning up the syntax,

I believe that the syntax changes in 3.0.a0 are pretty much what will be in 
3.0.

| Finally, another thing I've perhaps missed, but I can't see anything in
| what I've gone through, about correcting of of what I see to be one of
| Python's most long-standing really serious flaws, which is the lack of
| an official standard documentation markup syntax for writing
| documentation in code. This isn't even a matter of getting something
| developed, it's simply a matter of Guido and the Powers That Be
| bestowing their benediction on one of the several adequate or better
| documentation toolsets out there, so that more of us (slowly) start
| using it. Eventually this will result in work on the toolset itself,
| more people will be willing to use it, and there'll be a nice virtuous
| circle.

Except for the core language, Guido generally avoids trying to pick and 
impose winners (as opposed to recognizing winners).  So, as far as I know, 
he never 'pronounced' on PEP 287.  On the other hand, its author 
volunteered as a PEP editor and posted PEP12.  And for 2.6, the doc sources 
have been converted, I understand, from Latex to .rst due to work led by 
(and mostly done by?) G. Brandl (who is still working on the toolset).  So 
consider that a 'benediction' if you wish.

tjr





From mickey at disney.com  Wed Sep 12 16:31:23 2007
From: mickey at disney.com (Wiseman)
Date: Wed, 12 Sep 2007 16:31:23 -0400
Subject: Python Problem
References: <l404e316v2lknjsfrct9nlcs2jl9206qrf@4ax.com>
	<pl6ee3hutvaf3s8399upqq4tap4bqn7r8m@4ax.com>
	<slrnfef44e.1di.hat@se-162.se.wtb.tue.nl>
	<5kpj30F4s6gmU1@mid.uni-berlin.de>
Message-ID: <imige3hi8gikthmfrkk1hpks86q7v55l5k@4ax.com>

Marc,

Thank you.

I followed the instructions in given at pyenchant.sourceforge.net  and
got the application to work.

((;-))
Meir

PS: My challenge now is to port the application to Redhat. 
I already know that Redhat is missing the pyenchant package - I hope
the same installation process will solve the problem. It also missing
"threading" and this will be the story for another day.

I'll appreciate any hint from anyone who've already solved such a
problem

M
----------------------------------------------------------------

On 12 Sep 2007 07:33:52 GMT, Marc 'BlackJack' Rintsch <bj_666 at gmx.net>
wrote:

>On Wed, 12 Sep 2007 09:09:02 +0200, A.T.Hofkamp wrote:
>
>> On 2007-09-11, Wiseman <mickey at disney.com> wrote:
>>>
>>>  Hi,
>>>
>>> OK - it works in WindowsXP.
>>> I installed "enchant" on my SuSE 10.0 (using YAST). 
>>> The enchant Suse package looks like a general Linux package, not a
>>> Python specific.
>> 
>> You'd seem to be right judging by this web-page:
>> http://www.novell.com/products/linuxpackages/suselinux/enchant.html
>> 
>> As you can see, there is no file installed at a path with "python" in it.
>> 
>>> What am I missing?
>> 
>> Python bindings to the library perhaps?
>> You may be more lucky with an enchant-dev package (if it exists). I am however
>> not a Suse user and not an echant user (well, not from my Python code at least).
>
>PyEnchant seems to be an independent project:
>
>  http://pyenchant.sourceforge.net/
>
>So there is either an extra package for SuSE or the OP has to build it
>himself.
>
>Ciao,
>	Marc 'BlackJack' Rintsch



From xkenneth at gmail.com  Fri Sep 28 13:36:54 2007
From: xkenneth at gmail.com (xkenneth)
Date: Fri, 28 Sep 2007 17:36:54 -0000
Subject: Can I overload the compare (cmp()) function for a Lists ([])
	index function?
In-Reply-To: <1191000652.430036.288400@y42g2000hsy.googlegroups.com>
References: <1191000652.430036.288400@y42g2000hsy.googlegroups.com>
Message-ID: <1191001014.951696.285800@50g2000hsm.googlegroups.com>

On Sep 28, 12:30 pm, xkenneth <xkenn... at gmail.com> wrote:
> Looking to do something similair. I'm working with alot of timestamps
> and if they're within a couple seconds I need them to be indexed and
> removed from a list.
> Is there any possible way to index with a custom cmp() function?
>
> I assume it would be something like...
>
> list.index(something,mycmp)
>
> Thanks!

or can i just say....

list.index.__cmp__ = mycmp

and do it that way? I just want to make sure I'm not doing anything
evil.



From gslindstrom at gmail.com  Sat Sep  1 20:52:51 2007
From: gslindstrom at gmail.com (Greg Lindstrom)
Date: Sat, 1 Sep 2007 19:52:51 -0500
Subject: PyCon 2008 - Call for Tutorial Topics
Message-ID: <a9f39a410709011752n7c5b60aej96be56f346a13cf2@mail.gmail.com>

Hello All,

We are still soliciting ideas for tutorials to put on at PyCon in Chicago
next spring.  PyCon is all about our community; under the direction of the
PSF, planned, organized and run by volunteers just like you.  We are asking
for topics that you want to see covered on the tutorial day (the day
preceding the "official" conference).  There is an additional charge for
these classes but they are taught by instructors who really know their
topics.  The following ideas have been requested (nothing has been
scheduled, yet):

   - Testing strategies
   - Intermediate Python
   - Database
   - How to "think" in Python 3000
   - Using Cheeseshop
   - SOAP/.Net (Iron Python?)
   - Programming Contest

We need more ideas before we start putting things together.  What do *you*
want to see?  This is your chance to learn from the experts (or, maybe,
*you* would like to present a class).

Let me know what class would entice you to attend the tutorials.

Greg Lindstrom
Tutorial Coordinator, PyCon 2008
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From nospam at 23342.om  Thu Sep 13 01:20:36 2007
From: nospam at 23342.om (Amit N)
Date: Thu, 13 Sep 2007 01:20:36 -0400
Subject: Parallel/Multiprocessing script design question
Message-ID: <yK3Gi.61203$Pv4.51195@newsfe19.lga>

Hi guys,

I tend to ramble, and I am afraid none of you busy experts will bother 
reading my long post, so I will try to summarize it first:

1. I have a script that processes ~10GB of data daily, and runs for a long 
time that I need to parallelize on a multicpu/multicore system. I am trying 
to decide on a module/toolkit that would help me create a multiprocessing 
solution but there are so many of them that I can't decide what to use. I am 
looking for a cross platform solution. Although right now it has to work in 
windows first, so many of the fork based modules are out. I am hoping people 
with experience using any of these would chime in with tips. The main thing 
I would look for in a toolkit is maturity and no extra dependencies. Plus a 
wide user community is always good. 
POSH/parallelpython/mpi4py/pyPar/Kamaelia/Twisted I am so confused :(

2. The processing involves multiple steps that each input file has to go 
through. I am trying to decide between a batch mode design and a pipelined 
design for concurrency. In the batched design, all files will be processed 
on one processing step(in parallel) before the next step is started. In a 
pipelined design, each file will be taken through all steps to the end. So 
multiple files will be in parallel pipelines at the same time. I can't 
decide which is better. I guess I am asking for experienced eyes to take a 
look at the alternatives, for things that I, making my very first concurrent 
design, won't see.

DETAILS:

I have been trying to choose a design for this project but am striken by my 
usual case of analysis paralysis.

I had decided to learn Python about 3 weeks ago specifically for this 
project, as it needed parsing and text processing, not realizing that I 
would need concurrency. I am having the same trouble in deciding which 
parser generator to use, but I will ask about parsing in a separate thread 
to keep this focused.

It was slow, so I tried to run a multithreaded version, naively expecting a 
2x speedup. I barely got a 5% improvement and only then learned about the 
GIL. I guess I still haven't got too much time invested in this, so I can 
still switch to another language. I am not sure which other scripting 
languages have real multithreading? Perl? But I had chosen Python over Perl 
for readability and maintainability and am not ready to give that up yet. I 
know about stackless/Ironpython/Jython but I want to stick to CPython. So I 
am going to try to figure this out.

Even after deciding to go for a SMP solution, I still don't know which 
toolkit to use. The subprocess module should allow spawning new processes, 
but I am not sure how to get status/error codes back from those? I guess 
this is why people made those parallel processing modules that might help by 
taking care of these things.  I think my application is fairly simple and 
should be easy to SMP.

THE TASK:

About 800+ 10-15MB files are generated daily that need to be processed. The 
processing consists of different steps that the files must go through:

-Uncompress
-FilterA
-FilterB
-Parse
-Possibly compress parsed files for archival

All files have to be run through each of the two filters. The two filters 
are independent of each other and produce output files that need separate 
parsers. So they can in fact run in parallel, and so can the subsequent 
parsers. Furthermore, multiple files can be running in parallel inside each 
step. Eg. 4 files being uncompressed at the same time. I am using the python 
library for uncompressing and will be doing the parsing in Python too. But 
the two filters are external console programs that I spawn in the system 
shell with subprocess.call(). I guess I can forget about communicating with 
those?

The first method that came to mind was to finish each step on all files 
before going to the next. So all files are uncompressed first, using 
multiple processes in parallel. Then all files are filtered in parallel, 
etc. I guess I would need some sort of queuing system here, to submit files 
to the CPUs properly?

The other way could be to have each individual file run through all the 
steps and have multiple such "pipelines" running simultaneously in parallel. 
It feels like this method will lose cache performance because all the code 
for all the steps will be loaded at the same time, but I am not sure if I 
should be worrying about that. This will have the advantage of "Fast 
First-Out" which means that something waiting for the results of processing 
won't have to wait till the very end. They can start receiving data 
incrementally from the start(kind of streaming?). Pipelined mode may also 
help to rerun an individual file quickly in case it had an error.
So whats the better method?

EVALUATIONS:

POSH - Doesn't seem mature, was supposed to be proof of concept only. People 
have reported Bugs/Problems using it. POSIX Only.
delegate/forkmap/pprocess - fork based, POSIX only
ParallelPython - Seems to meet all criteria, and is cross platform. I will 
be trying this one first.
remoteD - Claims to be platform independent, but I don't think so. Code 
shows os.fork only. Last updated 2004 v0.8
processing - Is in beta V0.33 but looks promising and is cross platform. 
Emulates processes as threads. http://www.python.org/pypi/processing

MPI based modules(probably overkill for my application):

pyPar - Mature, cross platform. Has a dependency on Numeric Python + needs a 
C compiler.
pyMpi - POSIX only . Alpha status. From lawrence livermore labs. It modifies 
the interpreter itself to make it multi-noded.
mpi4py - ? another MPI implementation.

LINKS & DISCUSSIONS

http://wiki.python.org/moin/ParallelProcessing
http://blog.ianbicking.org/gil-of-doom.html
http://www.usenix.org/events/hotos03/tech/full_papers/vonbehren/vonbehren_html/index.html
http://groups.google.com/group/comp.lang.python/browse_thread/thread/1f5d927d34f8f323/
http://groups.google.com/group/comp.lang.python/browse_frm/thread/332083cdc8bc44b/
http://groups.google.com/group/comp.lang.python/browse_frm/thread/13da24f2d6dc24a9/
http://groups.google.com/group/comp.lang.python/browse_thread/thread/f822ec289f30b26a/
http://groups.google.com/group/comp.lang.python/browse_thread/thread/902dbddfc31b8891
http://groups.google.com/group/comp.lang.python/browse_thread/thread/d8fa9ad770c17c70/




From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Sep  7 07:10:46 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 07 Sep 2007 13:10:46 +0200
Subject: So what exactly is a complex number?
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>	<mailman.212.1188576194.28954.python-list@python.org>	<451mq4-les.ln1@ozzie.tundraware.com>	<mailman.266.1188644067.28954.python-list@python.org>	<lbjpq4-eo22.ln1@ozzie.tundraware.com>	<mailman.310.1188805355.28954.python-list@python.org>
	<5k86hqF2if1hU1@mid.individual.net>
	<mailman.141.1189072245.2658.python-list@python.org>
Message-ID: <5kcptmF32f64U1@mid.individual.net>

Grzegorz S?odkowicz wrote:
> Interesting. It appears that we are ran into a mathematical
> cultural difference. Were I come from vectors *are* defined as
> having four properties that I enumerated. After some research I
> found that English sources (Wikipedia) indeed give the definition
> you supplied. 

Indeed, interesting.

> However, given the following problem: (assuming 2-d Cartesian
> coordinate system and gravity acting 'downwards') "There are 3
> point masses: 2 kg at (0, 0), 1 kg at (5, 4) and 4 kg at (2, 2).
> The acting forces are given as vectors: [2, 2] [1, 1]. Find the
> trajectories of all point masses." how would you propose to solve
> it without knowing where the forces are applied?

I didn't say that you must not know the point of application, but I
said that it was not a property of the vector itself. It is true,
however, that in physical calculations you should not "mix" many
types of vectors (like force) that are, in the experiment, applied
to different points of application.

> Again, I think we were given different definitions. Mine states
> that direction is 'the line on which the vector lies', sense is
> the 'arrow' and magnitude is the 'length' (thus non-negative). The
> definition is separate from mathematical description (which can be
> '[1 1] applied at (0, 0)' or 'sqrt(2) at 45 deg applied at (0, 0)'
> or any other that is unambiguous).

Oh, I thought we were talking about quite mathematical vectors? In
physics, I learned that a vector is only what transforms like a
vector.

>> Represent the direction as one number? Only in a one-dimensional
>> space.
>   
> No. In one-dimensional 'space' direction is a ? quantity (a
> 'sense'). In 2-d it can be given as an angle.

Indeed, you're right. So, those vectors have different properties
depending on the used coordinate system? I myself prefer the
concise definition ...

Regards,


Bj?rn

-- 
BOFH excuse #128:

Power Company having EMP problems with their reactor



From wolf_tracks at invalid.com  Thu Sep 20 13:04:20 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Thu, 20 Sep 2007 17:04:20 GMT
Subject: An Editor that Skips to the End of a Def
In-Reply-To: <87odfxjn16.fsf@rudin.co.uk>
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
Message-ID: <oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>

Thanks, but no thanks. The learning curve is way too steep.

Paul Rudin wrote:
> "W. Watson" <wolf_tracks at invalid.com> writes:
> 
>> Is there an editor that allows one to position to put the cursor and
>> then by pushing some button goes to the end of the def?
> 
> C-M-e in emacs/python-mode.

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From rainwatching at gmail.com  Sat Sep  1 11:51:37 2007
From: rainwatching at gmail.com (=?iso-8859-1?q?S=F6nmez_Kartal?=)
Date: Sat, 01 Sep 2007 15:51:37 -0000
Subject: reload(sys)
In-Reply-To: <5jql4rFh543U4@mid.uni-berlin.de>
References: <1188521143.421431.119100@l22g2000prc.googlegroups.com>
	<JK2dnSgydPkg8ErbnZ2dnUVZ_u3inZ2d@comcast.com>
	<1188564816.430863.219560@w3g2000hsg.googlegroups.com>
	<5jql4rFh543U4@mid.uni-berlin.de>
Message-ID: <1188661897.795595.165590@k79g2000hse.googlegroups.com>

On 31 A ustos, 16:58, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Fri, 31 Aug 2007 12:53:36 +0000, S?nmez Kartal wrote:
> > On 31 A ustos, 04:24, Steven Bethard <steven.beth... at gmail.com> wrote:
> >> Snmez Kartal wrote:
> >> > I've had an encoding issue and solved it by
> >> > "sys.setdefaultencoding('utf-8')"...
>
> >> > My first try wasn't successful since setdefaultencoding is not named
> >> > when I imported sys module. After, I import sys module, I needed to
> >> > write "reload(sys)" also.
>
> >> > I wonder why we need to call "reload(sys)" to get setdefaultencoding
> >> > named?
>
> >> sys.setdefaultencoding is purposely deleted from the sys module after
> >> it's loaded because you really shouldn't be using it. The reload() call
> >> restores the deleted attribute.
>
> >> If you'd like a less brittle solution to your encoding issue, explain
> >> what the issue was, and people here can probably help you find a better
> >> solution.
>
> > I was using the XMLBuilder(xmlbuilder.py). I'm writing XML files as
> > "f.write(str(xml))". At execution of that line, it gives error with
> > description, configure your default encoding...
>
> This doesn't help us that much.  What is `f` here and what is `xml`?
>
> > This is the part of xmlbuilder.py which raises the error.
>
> >         try:
> >             if self.pretty:
> >                 # tabs are evil, so we will use two spaces
> >                 outstr = self._dom.toprettyxml("
> > ",encoding=self.encoding)
> >             else:
> >                 outstr = self._dom.toxml(encoding=self.encoding)
> >         except UnicodeDecodeError:
> >             sys.stderr.write('Decoding Error: You must configure
> > default encoding\n')
> >             sys.exit()
>
> So there is an attribute `self.encoding` on that object.  Is it set?  What
> encoding is it?  And do you put byte strings with values outside ASCII
> into your XML or unicode strings?
>
> Ciao,
>         Marc 'BlackJack' Rintsch

I should have said that 'f' is a file object and xml is a XMLBuilder
object. Sorry. :-)

self.encoding is 'utf-8' by default.

I have only ? and ? characters in the XML file and a space character
which Emacs shows as colored '_'. I have replaced those but didn't
work!

Here is the full code of xmlbuilder.py: http://rafb.net/p/9rURi822.html

I don't wanna bother you but if you see there is something not
practical then I'll keep writing about this. :-)



From horpner at yahoo.com  Thu Sep 27 09:24:54 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Thu, 27 Sep 2007 13:24:54 GMT
Subject: What is a good way of having several versions of a python module
	installed in parallell?
References: <fdai0b$7iv$1@news.lysator.liu.se>
	<5ls95aF9pq3gU1@mid.uni-berlin.de>
	<mailman.1054.1190736712.2658.python-list@python.org>
	<fdborn$h5q$1@news.lysator.liu.se>
Message-ID: <slrnffl73b.1mg.horpner@FIAD06.norwich.edu>

On 2007-09-25, Joel Hedlund <joel.hedlund at gmail.com> wrote:
> First of all, thanks for all the input - it's appreciated.
>
>> Otherwise, three words:
>> 
>>   test driven development
>
> Do you also do this for all the little stuff, the small hacks
> you just whip together to get a particular task done? My
> impression is that doing proper unittests adds a lot of time to
> development, and I'm thinking that this may be a low return
> investment for the small programs.

For documentating and testing small hacks, try the doctest
module. It integrates with Python's unit testing modules, so if
you need to "graduate", it is simple to do so.

-- 
Neil Cerutti


From paddy3118 at googlemail.com  Fri Sep  7 03:01:08 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Fri, 07 Sep 2007 07:01:08 -0000
Subject: Text processing and file creation
In-Reply-To: <1189133439.559915.233350@19g2000hsx.googlegroups.com>
References: <1189008809.718361.45790@g4g2000hsf.googlegroups.com>
	<1189024097.175349.221210@w3g2000hsg.googlegroups.com>
	<1189027060.889829.282510@r34g2000hsd.googlegroups.com>
	<1189133439.559915.233350@19g2000hsx.googlegroups.com>
Message-ID: <1189148468.577147.133510@22g2000hsm.googlegroups.com>

On Sep 7, 3:50 am, George Sakkis <george.sak... at gmail.com> wrote:
> On Sep 5, 5:17 pm, "malibus... at gmail.com" <malibus... at gmail.com>
> wrote:
> If this was a code golf challenge,

I'd choose the Unix split solution and be both maintainable as well as
concise :-)

- Paddy.



From __peter__ at web.de  Fri Sep 21 04:41:42 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 21 Sep 2007 10:41:42 +0200
Subject: Tapping into the access of an int instance
References: <mailman.818.1190308885.2658.python-list@python.org>
Message-ID: <fd0046$hhe$00$1@news.t-online.com>

Tor Erik S?nvisen wrote:

> Does anyone know how to interrupt the lookup of an integer value? I
> know I need to subclass int, since builtin types can't be altered
> directly...
> 
> Below is how far I've come... What I want is to tap into the access of
> instance i's value 1...
> 
>>>> class Int(int):
> 	def __init__(self, *a, **k):
> 		super(Int, self).__init__(self, *a, **k)
> 
> 		
>>>> i = Int(1)
>>>> i
> 1

You may be looking for __new__() which is invoked before an object is
created. This is particular useful for immutables like int.

>>> lookup = {}
>>> class Int(int):
...     def __new__(cls, value, *more):
...             if not more:
...                     try:
...                             return lookup[value]
...                     except KeyError:
...                             pass
...             return int.__new__(cls, value, *more)
... 
>>> lookup["answer"] = Int(42)
>>> Int("answer")
42
>>> type(_)
<class '__main__.Int'>

Peter


From fred.sells at adventistcare.org  Fri Sep 14 10:40:27 2007
From: fred.sells at adventistcare.org (Sells, Fred)
Date: Fri, 14 Sep 2007 10:40:27 -0400
Subject: How to Start
In-Reply-To: <MPG.215360ba6684d43b9896d5@news.cox.net>
Message-ID: <0A53725C4A497848A7B3A0874B2598313D389C@acesxch01.ADVENTISTCORP.NET>

I like eclipse+pydev; although I did pay my dues learning the basics of
eclipse. F9 saves file and runs it.

If you're an emacs dude, emacs + python mode is pretty good.  ctrl-c
ctrl-c runs the active buffer.  Of course if you don't already know
emacs, avoid it like the plague.

> -----Original Message-----
> From: python-list-bounces+frsells=adventistcare.org at python.org
> [mailto:python-list-bounces+frsells=adventistcare.org at python.org]On
> Behalf Of Michael R. Copeland
> Sent: Thursday, September 13, 2007 6:00 PM
> To: python-list at python.org
> Subject: How to Start
> 
> 
>    I've decided that Python is a language/environment I'd 
> like to learn 
> (I've been a professional programmer for 45+ years), but I 
> really don't 
> know where and how to start!  I have a number of books - and 
> am buying 
> some more - but because of the bewildering number of after-market 
> packages, environments, and add-ons, I am really quite 
> perplexed about 
> starting.  8<{{
>    Yes, I could fire up the interactive mode and play with some 
> statements...but I consider that sort of thing for 
> programming neophytes 
> or experimenting with specific issues.  First, I want to develop a 
> simple Windows application, and because of the plethora of 
> "stuff" the 
> Python world offers, I don't know where to begin.  
>    For example, what basic, easy-to-use interface might I 
> start with to 
> build a simple text file parsing and analysis program?  That is, I'd 
> like to start with a simple Windows shell that prompts for a 
> file name, 
> processes it, and then displays some result.
>    I am certainly impressed with the apparent experience and 
> openness of 
> the regular players here, but the discussions here (and in 
> c.l.p.announce) truly presume knowledge and experience with Python I 
> don't yet have.  Yes, for even a very experienced programmer, 
> entering 
> the Python world is very daunting - but I want to get started.
>    Please advise.  TIA
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Sep 18 04:16:02 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 18 Sep 2007 10:16:02 +0200
Subject: Python 3K or Python 2.9?
In-Reply-To: <fcn81q$g80$1@panix3.panix.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<87ir6f5mrq.fsf@benfinney.id.au> <1189651204.408268.57580@1
	<46ee2d9d$0$26213$426a74cc@news.free.fr>
	<fcn81q$g80$1@panix3.panix.com>
Message-ID: <46ef893c$0$21882$426a34cc@news.free.fr>

Aahz a ?crit :
> In article <46ee2d9d$0$26213$426a74cc at news.free.fr>,
> Bruno Desthuilliers  <bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote:
>> But what, given that I'm an AOL user still thinking it's kewl to hide 
>> behind a pseudo, what else would you expect ?
> 
> What exactly is a "pseudo", pray tell?
Sorry : a pseudonym (a nickname).


From zentraders at gmail.com  Fri Sep 14 10:49:11 2007
From: zentraders at gmail.com (Zentrader)
Date: Fri, 14 Sep 2007 07:49:11 -0700
Subject: subclass of integers
In-Reply-To: <1189780201.692192.291010@k79g2000hse.googlegroups.com>
References: <1189780201.692192.291010@k79g2000hse.googlegroups.com>
Message-ID: <1189781351.120047.281620@d55g2000hsg.googlegroups.com>

I would do something along the lines of the following, although it
only tests for integers and not floats, so would return 'None' for a
float.

class Nint(int):
    def __add__(self, x, y):
        if isinstance(x, int) and isinstance(y, int):
            return x+y
        return None

if __name__=='__main__':
    N=Nint()
    print N.__add__( 1, 2 )
    print N.__add__( 1, None )



From paddy3118 at googlemail.com  Mon Sep 17 17:21:27 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Mon, 17 Sep 2007 14:21:27 -0700
Subject: How to assign a function to another function
In-Reply-To: <mailman.659.1190049087.2658.python-list@python.org>
References: <mailman.657.1190047202.2658.python-list@python.org>
	<87d4whnsnd.fsf@rudin.co.uk>
	<mailman.659.1190049087.2658.python-list@python.org>
Message-ID: <1190064087.028773.6910@o80g2000hse.googlegroups.com>

On Sep 17, 6:11 pm, Stefano Esposito <stefano.esposit... at gmail.com>
wrote:
> On Mon, 17 Sep 2007 17:49:58 +0100
>
>
>
> Paul Rudin <paul.nos... at rudin.co.uk> wrote:
> > Stefano Esposito <stefano.esposit... at gmail.com> writes:
>
> > > Hi all
>
> > > what i'm trying to do is this:
>
> > >>>>def foo ():
> > > ...   return None
> > > ...
> > >>>>def bar ():
> > > ...   print "called bar"
> > > ...
> > >>>>def assigner ():
> > > ...   foo = bar
> > > ...
> > >>>>assigner()
> > >>>>foo()
> > > called bar
>
> > > This piece of code is not working and even trying with...
>
> > > ... How can I achieve my goal?
>
> > By adding the line:
> >    global foo
> > at the beginning of the body of assigner.
>
> This worked, thanks a lot :)
>
> --
> Stefano Esposito <stefano.esposit... at gmail.com>

I got this explained to me awhile back and blogged on it here:
  http://paddy3118.blogspot.com/2006/07/python-functions-assignments-and-scope.html

- Paddy.



From steve at holdenweb.com  Tue Sep 11 08:32:37 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 11 Sep 2007 08:32:37 -0400
Subject: newbie: stani's python editor if-else
In-Reply-To: <1189484688.520933.25000@22g2000hsm.googlegroups.com>
References: <1189484688.520933.25000@22g2000hsm.googlegroups.com>
Message-ID: <fc61t4$ap9$1@sea.gmane.org>

madzientist wrote:
> hi,
> 
> two quick questions:
> 
> a) i am using SPE (latest version) and for some reason, when i type,
> say
> 
> if 1==2:
>     print "not equal"
>     else:
>           print "equal"
> 
> the else is at the same indentation level as the preceding print
> statement, and i get a syntax error
> 
> why doesn't spe automatically put the else at the level of the if
> statement ? what am i dong wrong ? once i manually change the
> indentation, the code snippet runs perfectly.
> 
> b) if this is not the group for such elementary questions, please do
> let me know.
> 
> thanks !!!!
> 
> suresh
> 

The point here is that SPE isn't analyzing your source in sufficient 
detail to recognize the need to "outdent" the else statement. Clearly 
there could be any number of statements at the same indent level as the 
first print statement.

For the record this is not a behavior restricted to SPE, but also occurs 
in Wing IDE, PythonWin and Scite, for starters.

Technically you are correct in the example you give: an IDE could decide 
to remove one level of indentation, but of course there's always the 
"dangling else" problem: if one "if" statement is nested inside another 
one, which indentation level would be appropriate for an "else"?

Generally speaking, only the programmer can know, and so generally you 
are left to enforce these issues for yourself.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From bignose+hates-spam at benfinney.id.au  Mon Sep 10 20:18:11 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 11 Sep 2007 10:18:11 +1000
Subject: Enum class with ToString functionality
References: <1189416537.050002.61120@r34g2000hsd.googlegroups.com>
Message-ID: <87bqca9hrw.fsf@benfinney.id.au>

bg_ie at yahoo.com writes:

> But it would be much nicer if I had a function to covert to string
> as part of the TestOutcomes class. How would I implement this?

Others have given ad hoc implementations that may do what you want.

I'd like to know if the Cheeseshop package 'enum' is useful to
you. Any constructive feedback would be appreciated.

    <URL:http://cheeseshop.python.org/pypi/enum/>

-- 
 \       "Remorse: Regret that one waited so long to do it."  -- Henry |
  `\                                                        L. Mencken |
_o__)                                                                  |
Ben Finney


From dborne at gmail.com  Fri Sep 21 10:13:51 2007
From: dborne at gmail.com (Dave Borne)
Date: Fri, 21 Sep 2007 09:13:51 -0500
Subject: SHOCK: WHY None?
In-Reply-To: <1190383137.015553.235870@o80g2000hse.googlegroups.com>
References: <1190383137.015553.235870@o80g2000hse.googlegroups.com>
Message-ID: <6e42ec490709210713t61334cfbk10496206601c9d2f@mail.gmail.com>

>     else:
>         f(i+1,sm+a[i])

Maybe because you are ignoring the return value of the when you recurse...

try this

     else:
         return f(i+1, sm+a[i])


-Dave


From arnodel at googlemail.com  Sun Sep  9 05:30:00 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 09 Sep 2007 02:30:00 -0700
Subject: unexpected behavior: did i create a pointer?
In-Reply-To: <13e4rno5qal6h4b@corp.supernews.com>
References: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>
	<46e11dfe$0$4517$9b4e6d93@newsspool3.arcor-online.net>
	<pan.2007.09.07.10.40.46@REMOVE.THIS.cybersource.com.au>
	<fbrdsm$5f3$01$1@news.t-online.com>
	<13e2jdobu2kqkf1@corp.supernews.com>
	<fbtl7i$um3$02$2@news.t-online.com>
	<13e4rno5qal6h4b@corp.supernews.com>
Message-ID: <1189330200.935267.107970@19g2000hsx.googlegroups.com>

On Sep 8, 10:44 am, Steven D'Aprano <st... at REMOVE-THIS-
cybersource.com.au> wrote:
[...]
> Ways that Python objects are like pointers:
>
> (1) ... um...
>
> Oh yeah, if you bind the _same_ object to two different names, _and_ the
> object is mutable (but not if it is immutable), mutating the object via
> one name will have the same effect on the object -- the same object,
> naturally -- bound to the other name.

Well one of the main uses of pointers in C is as things that *point
to* objects.  And AFAIK that's exactly what a name is in Python.  In
fact I think to say that  a name points to (or refers to) an object is
less misleading that to say it is bound to.  Binding implies some sort
of symmetry but when I write:

a = "Am I bound?"

The name a knows it's refering to the string object, whereas the
string has no idea who refers to it (well an implementation might want
to store this information, but it is inaccessible).

> You know, maybe because I came to Python with no C experience, I never
> had trouble with the "unexpected behaviour" that so confused the original
> poster. It's just obvious.

The funny thing is that if the OP had thought of both 'a' and
'copyOfA' as C-like pointers then he wouldn't have been confused :)

--
Arnaud




From arnodel at googlemail.com  Thu Sep  6 13:55:06 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Thu, 06 Sep 2007 10:55:06 -0700
Subject: Help setting default class attributes
In-Reply-To: <1189099594.432512.278950@22g2000hsm.googlegroups.com>
References: <1189099594.432512.278950@22g2000hsm.googlegroups.com>
Message-ID: <1189101306.620588.89140@r29g2000hsg.googlegroups.com>

On Sep 6, 6:26 pm, rh0dium <steven.kl... at gmail.com> wrote:
> Hi all,
>
> I have the following piece of code and I wanted to set the default
> attributes based on a dictionary. What I am looking for is a way to
> take PIPODEFAULTS and assign each one as an attribute for the class
> pipo.  Can someone show me how to do this by iterating over the
> PIPODEFAULTS and assign them.  What I would expect to be able to do is
> call the class and modify them.

Use the setattr(...) function.

> example:
> a = pipo()
> print a.caseSensitivity
> "preserve"
>
> a.caseSensitivity = "lower"
> print a.caseSensitivity
> "lower"
>
> Lastly - here is my code:
>
> class pipo:
>
>     PIPODEFAULTS={ "caseSensitivity" : "preserve","cellMapTable" :
> "","checkPolygon" : "nil","compression" : "none",
>                    "convertDot" : "ignore","convertPathToPoly" :
> "nil","convertToGeo" : "nil","dumpPcellInfo" : "nil",
>                    "snapToGrid" : "nil","techFileChoice" :
> "nil","units": "micron","useParentXYforText" : "nil","viewName" :
> "layout",
>                   }
>
>     def __init__(self, *args, **kwargs):
>         """This simply will run a PIPO stream out
>         """
>         # Setup Logging
>         self.pipoargs=self.setdefaults()
>     def setdefaults(self):
>         for x in self.PIPODEFAULTS:
>             self.log.debug("Setting %s to %s" % (x,
> self.PIPODEFAULTS[x]))

    def setdefaults(self):
        for key, val in self.PIPODEFAULTS.iteritems():
            setattr(self, key, val)

OR (but I prefer the one above)

    def setdefaults(self):
        self.__dict__.update(self.PIPODEFAULTS)

--
Arnaud



From kyosohma at gmail.com  Thu Sep 27 09:27:54 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 27 Sep 2007 13:27:54 -0000
Subject: Cross-platform time out decorator
In-Reply-To: <1190802115.585306.250400@o80g2000hse.googlegroups.com>
References: <1190802115.585306.250400@o80g2000hse.googlegroups.com>
Message-ID: <1190899674.049695.103430@22g2000hsm.googlegroups.com>

On Sep 26, 5:21 am, Joel <joel.schae... at gmail.com> wrote:
> I've been using this nice timing out decorator :http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/307871. The
> problem is that since it relies on sigalarm, it doesn't work under
> windows. Would anyone know how to do a cross-platform version?
>
> Thanks a lot!
>
> joel

You might be able to use the timeit module.

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

Some people like to use hotshot:

http://www.onlamp.com/pub/a/python/2005/12/15/profiling.html

I doubt this is what you're looking for, but maybe it'll give you a
push in the right direction.

Mike



From zzbbaadd at aol.com  Thu Sep 13 18:19:27 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Thu, 13 Sep 2007 15:19:27 -0700
Subject: How to Start
In-Reply-To: <MPG.215360ba6684d43b9896d5@news.cox.net>
References: <MPG.215360ba6684d43b9896d5@news.cox.net>
Message-ID: <1189721967.547833.185650@57g2000hsv.googlegroups.com>

On Sep 13, 2:59 pm, mrc2... at cox.net (Michael R. Copeland) wrote:
>    I've decided that Python is a language/environment I'd like to learn
> (I've been a professional programmer for 45+ years), but I really don't
> know where and how to start!  I have a number of books - and am buying
> some more - but because of the bewildering number of after-market
> packages, environments, and add-ons, I am really quite perplexed about
> starting.  8<{{
>    Yes, I could fire up the interactive mode and play with some
> statements...but I consider that sort of thing for programming neophytes
> or experimenting with specific issues.  First, I want to develop a
> simple Windows application, and because of the plethora of "stuff" the
> Python world offers, I don't know where to begin.
>    For example, what basic, easy-to-use interface might I start with to
> build a simple text file parsing and analysis program?  That is, I'd
> like to start with a simple Windows shell that prompts for a file name,
> processes it, and then displays some result.
>    I am certainly impressed with the apparent experience and openness of
> the regular players here, but the discussions here (and in
> c.l.p.announce) truly presume knowledge and experience with Python I
> don't yet have.  Yes, for even a very experienced programmer, entering
> the Python world is very daunting - but I want to get started.
>    Please advise.  TIA

I like Wing IDE ( http://www.wingware.com ) . They have a free version
and Personal and Professional versions.

The free version description says:
"Wing IDE 101

Wing IDE 101 is a free basic edition of Wing IDE that was originally
designed with the University of Toronto Computer Science Department
for teaching entry level computer science courses. It is not open
source but is free for use by educators, students, and hobbyists.

Note that Wing IDE 101 omits auto-completion and most other code
intelligence features in the other Wing IDE products. This was by
design, so that students are more conscious of the details of the
language and modules they are learning about."



From steve at holdenweb.com  Mon Sep 24 22:30:31 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 24 Sep 2007 22:30:31 -0400
Subject: Regular Expressions: Can't quite figure this problem out
In-Reply-To: <496954360709241917m3801e4aavee29cfef7deaf41b@mail.gmail.com>
References: <496954360709241737o6e42e7efk29886b5631f6ca2e@mail.gmail.com>	<a49e45f50709241827i107d0acav28431853ef403702@mail.gmail.com>	<496954360709241853w6bb6e813ved0ec4fc80304d51@mail.gmail.com>	<op.ty6tjyfqx6zn5v@gabriel2.softlabbsas.com.ar>
	<496954360709241917m3801e4aavee29cfef7deaf41b@mail.gmail.com>
Message-ID: <fd9rs6$8b2$1@sea.gmane.org>

Robert Dailey wrote:
> 
> 
> On 9/24/07, *Gabriel Genellina* <gagsl-py2 at yahoo.com.ar 
> <mailto:gagsl-py2 at yahoo.com.ar>> wrote:
> 
>     Yes: forget about regular expressions. ElementTree does that for free:
> 
> 
> That's not an option.
> 
Even though it's built into Python 2.5? That's a strange requirement.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From stefan.behnel-n05pAM at web.de  Wed Sep 12 08:17:28 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Wed, 12 Sep 2007 14:17:28 +0200
Subject: Generating HTML
In-Reply-To: <mailman.427.1189571602.2658.python-list@python.org>
References: <mailman.427.1189571602.2658.python-list@python.org>
Message-ID: <46E7D8D8.8060402@web.de>

Sebastian Bassi wrote:
> What are people using these days to generate HTML? I still use
> HTMLgen, but I want to know if there are new options. I don't
> want/need a web-framework a la Zope, just want to produce valid HTML
> from Python.

There's also lxml.html, which has straight forward support for generating HTML
and comes with a lot of nice goodies for HTML handling:

http://codespeak.net/lxml/dev/lxmlhtml.html#creating-html-with-the-e-factory

Note that this requires lxml 2.0, which is currently in alpha status.

Stefan


From arnodel at googlemail.com  Mon Sep  3 14:47:16 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 03 Sep 2007 11:47:16 -0700
Subject: trap setting attribute when the attribute is dict
In-Reply-To: <fbhi38$3rg$1@geraldo.cc.utexas.edu>
References: <fbhi38$3rg$1@geraldo.cc.utexas.edu>
Message-ID: <1188845236.417709.307160@50g2000hsm.googlegroups.com>

On Sep 3, 7:00 pm, <yos... at ccwf.cc.utexas.edu> wrote:
> Hello all,
>
> I have a question which might be simple or need some work around.
>
> I want to do something like this.  My class/instance has a dict as a
> property.  I want the instance to catch the change in the dict (change
> in some values, addition/deletion of key/value etc) to be recognized by
> the class instance.  
>
> How can I do this?  Any suggestions are very well appreciated.
>
> Here is an example of what I want my class to behave:
>
> class test(object):
>         def __init__(self):
>                 self._d = {}
>                 self._changed = False
>         def getd(self):
>                 print 'called getd'
>                 return self._d
>         # dont know what to do next
>         def setd(self,val):
>                 print 'called setd', key, val
>                 self._d[key] = val

Where does the 'key' come from?  Perhaps you need to look further into
how properties work.

>                 self._changed = True
>         d = property(getd,setd,None,None)
>
>         def getc(self):
>                 return self._changed
>         changed = property(getc,None,None,None)
>
> if __name__ == '__main__':
>         obj = test()
>         print 'obj.changed = ', obj.changed
>         print
>
>         # I want obj to know that its propety d being changed here
>         print "t.d['a'] = 1"
>         obj.d['a'] = 1
>         print
>
>         # I want the "changed" property to be True
>         print 'obj.changed = ', obj.changed
>

You can't do that with plain dicts, and I'm not sure it is often a
good idea.  However you could create a class that behaves like a dict
but calls a function each time an item is set, e.g. (made up
terminology):

>>> class TriggerDict(object):
...     def __init__(self, trigger, val=None):
...             self.trigger = trigger
...             self.dict_ = val or {}
...     def __setitem__(self, key, val):
...             self.trigger(self, key, val)
...             self.dict_[key] = val
...     def __getitem__(self, key):
...             return self.dict_[key]
...
>>> def trigger(d, k, v):
...     print '%s => %s' % (k, v)
...
>>> td = TriggerDict(trigger)
>>> td['spanish'] = 'inquisition' # see side effect below.
spanish => inquisition
>>> td['spanish']
'inquisition'
>>>

Obviously your trigger function would set the _changed attribute of
the test object instead.  And again it is probably not a good idea
unless you know exactly what you are doing.  If it was me, I'd try to
rethink my design instead.

HTH

--
Arnaud




From cscheit at lstm.uni-erlangen.de  Tue Sep 18 08:06:22 2007
From: cscheit at lstm.uni-erlangen.de (Christoph Scheit)
Date: Tue, 18 Sep 2007 14:06:22 +0200
Subject: Memory Problem
Message-ID: <200709181406.22771.cscheit@lstm.uni-erlangen.de>

Hi,

I have a short script/prog in order to read out binary files from a numerical 
simulation. This binary files still need some post-processing, which is
summing up results from different cpu's, filtering out non-valid entrys
and bringing the data in some special order.

Reading the binary data in using the struct-module works fine - I read
one chunk of data into a tuple, this tupel I append to a list.
At the end of reading, I return the list.

Then the data is added to a table, which I use for the actual Post-Processing.
The table is actually a Class with several "Columns", each column internally
being represented by array.
Now adding all the data from the simulation results to the table makes the
memory usage exploding. So I would like to know, where exactly the memory
is vasted.

Here the code to add the data of one file (I have to add the data of various 
files to the same table in total)

# create reader
breader = BDBReader("<var>", "<type>", "#")
 
# read data
bData = breader.readDB(dbFileList[0])

# create table
dTab = DBTable(breader.headings, breader.converters, [1,2])
addRows(bData, dTab)

Before I add a new entry to the table, I check if there is already an entry 
like this. To do so, I store keys for all the entries with row-number in a
dictionary. What about the memory consumption of the dictionary?

Here the code for adding a new row to the table:

# check if data already exists
if (self.keyDict.has_key(key)):
        rowIdx = self.keyDict[key]
        for i in self.mutableCols:
            self.cols[i][rowIdx] += rowData[i]
        return
            
 # key is still available - insert row to table
 self.keyDict[key] = self.nRows
        
 # insert data to the columns
 for i in range(0, self.nCols):
     self.cols[i].add(rowData[i])
        
 # add row i and increment number of rows
 self.rows.append(DBRow(self, self.nRows))
 self.nRows += 1

Maybe somebody can help me. If you need, I can give more implementation
details.

Thanks in advance,

Christoph
-- 

============================
M.Sc. Christoph Scheit
Institute of Fluid Mechanics
FAU Erlangen-Nuremberg
Cauerstrasse 4
D-91058 Erlangen
Phone: +49 9131 85 29508
============================


From gherron at islandtraining.com  Thu Sep  6 14:32:51 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 06 Sep 2007 11:32:51 -0700
Subject: Getting original working directory
In-Reply-To: <12.1809-14479-787046656-1189102077@seznam.cz>
References: <12.1809-14479-787046656-1189102077@seznam.cz>
Message-ID: <46E047D3.8070007@islandtraining.com>

rave247 rave247 wrote:
> "......the *original* directory location *after* os.chdir() is performed......" os.getcwd() is not helping much as it returns the location that was set up in os.chdir() call
>   
That requirement is just to absurd to be taken at face value.  Are you
saying you *CAN'T* call getcwd and save the value before you call chdir,
and that you *MUST* recover the original working directory *AFTER* you
change it.  I don't believe it... and won't waste my time trying to
solve such a silly problem until you demonstrate that you can't do it
any other way.

Gary Herron

> Thanks
>
>
>   
>> ------------ P?vodn? zpr?va ------------
>> Od: Gabriel Genellina <gagsl-py2 at yahoo.com.ar>
>> P?edm?t: Re: Getting original working directory
>> Datum: 06.9.2007 17:35:51
>> ----------------------------------------
>> On 6 sep, 12:19, rave247 rave247 <rave... at seznam.cz> wrote:
>>
>>     
>>> I' am unable to solve this problem. I've got python program, it is installed
>>>       
>> in standard location. I run this program from some location X (note that I just
>> type relative "myscript", leaving operating system to look up script itself
>> using PATH variable) and this program somewhere in the code calls os.chdir() to
>> change it is current working directory and I would need in python code to get
>> the *original* directory location *after* os.chdir() is performed. This means
>> the location X from which script was performed - it is the location I am in
>> after script is finished.
>>
>> Use os.getcwd()
>> http://docs.python.org/lib/os-file-dir.html
>>
>> --
>> Gabriel Genellina
>>
>> -- 
>> http://mail.python.org/mailman/listinfo/python-list
>>
>>
>>
>>     




From mail at timgolden.me.uk  Fri Sep 21 03:43:50 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Fri, 21 Sep 2007 08:43:50 +0100
Subject: looking for ocbc example
In-Reply-To: <LPGdnThcsrJMgG7bnZ2dnUVZ_uGknZ2d@comcast.com>
References: <LPGdnThcsrJMgG7bnZ2dnUVZ_uGknZ2d@comcast.com>
Message-ID: <46F37636.7030105@timgolden.me.uk>

Carl K wrote:
> It seems there are 2 odbc modules - pyOdbc and mxOdbc - anyone know the difference?

In short, pyodbc is open source; mxOdbc requires a commercial license.
pyodbc is a newcomer, but appears to work for everything I've thrown
at it (which is not much). mxOdbc has been around longer, and is sure
to be a more mature product. It may offer more features & functionality.

Unless you've got specific requirements (for example, commercial and/or
bleeding-edge support) I suggest you start with pyodbc. You should be
able to switch quite easily to mxODBC if that seems necessary later.

TJG


From mail at timgolden.me.uk  Sun Sep  2 04:41:01 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Sun, 02 Sep 2007 09:41:01 +0100
Subject: Windows Media Player Playlist
In-Reply-To: <eb79828c0709011503gb887d0fwe870efb6de6292cd@mail.gmail.com>
References: <eb79828c0709011503gb887d0fwe870efb6de6292cd@mail.gmail.com>
Message-ID: <46DA771D.40701@timgolden.me.uk>

Lamonte Harris wrote:
> Is it possible to use python to get the current playlist of the current 
> playing songs from Windows Media Player or Windows Player Classic?

I don't know what the answer is (not least because I never use
Windows Media Player) but a good guideline for this sort of
question is: can it be done *without* python? The chances are
that someone, somewhere, has tried to do this before and has
found an answer using VBScript or C# or whatever. If you look
around the internet and find such an answer, then people on
this list can hopefully help you translate that into Python.

TJG


From bdesth.quelquechose at free.quelquepart.fr  Mon Sep 17 05:41:34 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 17 Sep 2007 11:41:34 +0200
Subject: Python 3K or Python 2.9?
In-Reply-To: <1190053757.091035.221570@22g2000hsm.googlegroups.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<uir6ctto7.fsf@yahoo.com>
	<1190013827.107324.111820@w3g2000hsg.googlegroups.com>
	<mailman.645.1190026962.2658.python-list@python.org>
	<1190053757.091035.221570@22g2000hsm.googlegroups.com>
Message-ID: <46eee56b$0$15423$426a74cc@news.free.fr>

TheFlyingDutchman a ?crit :
> On Sep 17, 4:02 am, Steve Holden <st... at holdenweb.com> wrote:
(snip)

> I made a complaint about a small design choice.

It's by no mean a "small" design choice.

> I also made it in the
> past tense at least once ("should have done it") and explicitly
> expressed that I knew it wasn't going to happen. Python was created
> based on a language that was designed to make it easy to use by
> beginners.

Most beginners still find Python easy to use AFAICT. At least, I know a 
lot of *non* programmers using it.

> Doing so made it a clean and clear language. My preference
> is for everything to be as clean and clear as possible. 

Mine too, and that's why I like Python the way it is : syntactic sugar 
for the common cases, *and* and easy way to play with lower levels when 
necessary.

(snip)
> Jury-rigging new features is going to make the elite happy but very
> likely will be viewed differently by us average programmers.

"us" ? Who is "us" ?

>>change other aspects of the language, such as the ability to graft
>>functions into instances and classes as methods.
>  
> Those are elite-type features  that make code harder to understand by
> average programmers and probably the elite as well. 

Good news, there's a language designed exactly for "average programmers" 
that find these kind of features - as well as anything as complex as 
operator overloading, metaclasses, descriptors, higher order functions, 
multiple inheritance, lazy evaluation, and anything dynamic - way too 
"elite". It's named Java. The only drawback is that instead of "elite 
features", you'll have to resort to mumbo-jumbo overcomplexified "design 
patterns" and write ten times more code to solve the simplest things.

To make a long story short: if you don't understand some "advanced" 
Python's features, then just don't use them. But have mercy and let us 
"elite programmers" (lol...) use more of Python's power.


From kf9150 at gmail.com  Sat Sep 29 02:17:06 2007
From: kf9150 at gmail.com (kf9150 at gmail.com)
Date: Sat, 29 Sep 2007 06:17:06 -0000
Subject: your opinion on book "Foundations of Python Network Programming"?
In-Reply-To: <mailman.1266.1191019125.2658.python-list@python.org>
References: <1191016773.834049.8940@19g2000hsx.googlegroups.com>
	<mailman.1266.1191019125.2658.python-list@python.org>
Message-ID: <1191046626.355400.203160@50g2000hsm.googlegroups.com>

On Sep 28, 12:38 pm, "sean tierney" <sean.pythonl... at gmail.com> wrote:
> I just read it (though I bought it half a year ago...don't judge :).
>
> Author recommends Python 2.3 and above...and as far as I know the
> examples are good.  And if anything IS outdated -- you'll be able to
> do some quick research to get you to where you need to be...and he
> does mention code several areas of change/addition/modification. (ie
> urllib and urllib2).  He uses a couple of 3rd party projects too.
>
> I really liked the book.  I think Goerzen did a good job.  He
> addresses the code in the context of the problem the code is meant to
> solve, which I found helpful.  That said, it's not a substitute for
> actually reading the code.
>
> ...if you haven't read the most recent edition of Programming Python
> by Mark Lutz (O'Reilly), I'd recommend that first.  Programming Python
> covers (some) networking and everything else.  More bang for the $$.
>
> Sean

Sean, thanks for your review and recommendation of the book
Programming Python. atm, i'm looking for a book that has detailed
coverage on networking. so "Foundations of ..." seems to be a good
choice for me.



From carsten at uniqsys.com  Mon Sep 24 06:35:34 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 24 Sep 2007 06:35:34 -0400
Subject: python variable assignement
In-Reply-To: <1190628822.472242.272900@19g2000hsx.googlegroups.com>
References: <1190628822.472242.272900@19g2000hsx.googlegroups.com>
Message-ID: <1190630134.3385.14.camel@dot.uniqsys.com>

On Mon, 2007-09-24 at 10:13 +0000, mihai wrote:
> I work at an application witch has embeded python.
> 
> We have an python type X.
> 
> # a != b
> 
> a = b # at this point both variables have the same value

Not quite. At this point, 'a' and 'b' are names in the local namespace
that refer to the same object.

> b = select_other()

Now 'b' becomes a reference to the object returned by select_other().
Presumably that's a different object than the one it referred to before.
'a' still refers to the same object it referred to before.

> # steel the same values but both have the new value of b

No, the code you showed us wouldn't behave this way.

> What might be the cause for this behavior?

What behavior?

>  The type of a and b
> variable is the same,
> and is defined using PyTypeObject structure.

That doesn't matter. (Variable) Names don't have types. Objects have
types, and a name can refer to an object of any type. See
http://effbot.org/zone/python-objects.htm .

> I hope I was explicit.

Unfortunately, you weren't. If the above explanations didn't help you,
please explain what you want to achieve, show us your actual code and
what you expect it to do, and tell us what it's doing instead.

-- 
Carsten Haese
http://informixdb.sourceforge.net




From carsten at uniqsys.com  Fri Sep 21 14:23:20 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 21 Sep 2007 14:23:20 -0400
Subject: Parameterize formatting string
In-Reply-To: <18c1e6480709211116v1c830409q306605e414102272@mail.gmail.com>
References: <1190397297.236691.137220@19g2000hsx.googlegroups.com>
	<18c1e6480709211116v1c830409q306605e414102272@mail.gmail.com>
Message-ID: <1190399000.3393.38.camel@dot.uniqsys.com>

On Fri, 2007-09-21 at 20:16 +0200, David wrote:
> Or, more ugly:
> 
> "%%%di" % a % 12

Or, less ugly: "%*i" % (a,12)

-- 
Carsten Haese
http://informixdb.sourceforge.net




From ldo at geek-central.gen.new_zealand  Fri Sep  7 04:13:23 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Fri, 07 Sep 2007 20:13:23 +1200
Subject: library to launch program in linux
References: <1189103678.484278.321650@r34g2000hsd.googlegroups.com>
	<13e0itfgm0ida1c@corp.supernews.com>
	<mailman.179.1189107271.2658.python-list@python.org>
Message-ID: <fbr173$dha$3@lust.ihug.co.nz>

In message <mailman.179.1189107271.2658.python-list at python.org>, Laszlo Nagy
wrote:

> Grant Edwards wrote:
>
>> On 2007-09-06, idzwan.nizam at gmail.com <idzwan.nizam at gmail.com> wrote:
>>   
>>> I'm a new user. What library should I use so that I can launch
>>> program in linux using python?
>>>     
>>
>> subprocess
>>   
> Hmm, there are some others...

subprocess subsumes them all.


From richardjones at optushome.com.au  Thu Sep 27 20:40:20 2007
From: richardjones at optushome.com.au (Richard Jones)
Date: Fri, 28 Sep 2007 10:40:20 +1000
Subject: Python 3.0 migration plans?
References: <mailman.1195.1190936289.2658.python-list@python.org>
Message-ID: <46fc4d74$0$1027$afc38c87@news.optusnet.com.au>

Steve Holden wrote:
> I wondered if a straw poll could get some idea of readers' thoughts
> about when they will be migrating to 3.0 on, so I used the new widget on
> Blogger to add a poll for that.
> 
> I'd appreciate if if you would go to
> 
>    http://holdenweb.blogspot.com/
> 
> and register your vote on your intended migration timescale.

I'll use the "no plans" response for my actual "no simple answer" real
response.


    Richard



From steve at REMOVE-THIS-cybersource.com.au  Wed Sep 19 23:13:51 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Thu, 20 Sep 2007 03:13:51 -0000
Subject: super() doesn't get superclass
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au> <87k5qn5cwi.fsf@mulj.homelinux.net>
	<87y7f2w0xj.fsf@benfinney.id.au>
Message-ID: <13f3pbfh7to7k4b@corp.supernews.com>

On Thu, 20 Sep 2007 12:00:40 +1000, Ben Finney wrote:

> In its latter form, it is worthless to me when I'm looking for "get
> superclass of A", but its name and parameters and documentation all lead
> me very strongly to believe otherwise.

Why are you looking for the superclass of A?

If it is specifically for the purpose of inheritance, then surely "which 
class(es) is/are the superclass(es)" is an implementation detail that you 
shouldn't care about?

In other words, in principle you want to do something like the following:

class MyClass(*base_classes):
    def method(self, *args):
        print args
        return inherit_from_base_classes(self, 'method')(*args)
        # could also be written as: self.__inherit__('method', *args)
        # or even: self.__inherit__().method(*args)
        # or similar.

The details of the inheritance are not important, so long as it calls the 
right method of the right base-classes in the right order. You shouldn't 
need to know what that order is (except to the extent you've defined the 
base classes).

If that's what you want, then you don't need the class itself. You want 
*something like* super(), even though the existing implementation of 
super is sadly confusing and hard to use.

BUT I think, as far as I can tell, that super() does actually do the 
right thing, *if* you can work out just what arguments to give it, and 
provided all the base classes *and their bases classes* themselves also 
call super().

If you actually want the super-class(es) themselves, heaven knows why, 
then you can use MyClass.__base__ and MyClass.__bases__, although you 
have to intuit this from communing with the cosmos, because dir(MyClass) 
doesn't show them.



-- 
Steven.


From Shawn at Milochik.com  Wed Sep  5 12:18:34 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Wed, 5 Sep 2007 12:18:34 -0400
Subject: PythonAlley.com
In-Reply-To: <20070905153913.GD3437@gmail.com>
References: <2dc0c81b0709050727q7e56e99dnf8918e7d143d53a@mail.gmail.com>
	<20070905153913.GD3437@gmail.com>
Message-ID: <2dc0c81b0709050918n4466f630pdb6d57b219f36d73@mail.gmail.com>

On 9/5/07, O.R.Senthil Kumaran <orsenthil at gmail.com> wrote:
> * Shawn Milochik <Shawn at Milochik.com> [2007-09-05 10:27:08]:
> > I bought the domain PythonAlley.com (and PerlAlley.com and
> >
> > Does anyone have any ideas as to what a wonderful use for
> > PythonAlley.com would be? I'd really like to do something with at
>
> If "you" don't have an idea, most likely others wont have as well. :)
>
> --
> O.R.Senthil Kumaran
> http://uthcode.sarovar.org
>

Faulty logic. Otherwise, you would have to agree that you don't know
what you want for lunch if I don't know.


From antroy at gmail.com  Fri Sep 21 07:56:54 2007
From: antroy at gmail.com (Ant)
Date: Fri, 21 Sep 2007 04:56:54 -0700
Subject: An Editor that Skips to the End of a Def
In-Reply-To: <e8HIi.3303$4J3.1378@newssvr22.news.prodigy.net>
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk>
	<tfAIi.51111$Um6.44314@newssvr12.news.prodigy.net>
	<YPGIi.54591$YL5.26012@newssvr29.news.prodigy.net>
	<874phou1pa.fsf@benfinney.id.au>
	<e8HIi.3303$4J3.1378@newssvr22.news.prodigy.net>
Message-ID: <1190375814.425991.87490@r29g2000hsg.googlegroups.com>

On Sep 21, 4:47 am, "W. Watson" <wolf_tra... at invalid.com> wrote:
> How about in the case of MS Win?

Both emacs and vim have GUI versions that run on Windows.

--
Ant...



From trekker182 at gmail.com  Thu Sep 27 12:36:58 2007
From: trekker182 at gmail.com (Shawn Minisall)
Date: Thu, 27 Sep 2007 12:36:58 -0400
Subject: ValueError: too many values to unpack,>>> 
Message-ID: <46FBDC2A.30701@gmail.com>

I am trying to read a few lines of a file with multiple values, the rest 
are single and are reading in fine.

With the multiple value lines, python says this "ValueError: too many 
values to unpack"

I've googled it and it says that happens when you have too few or too 
many strings that don't match with the variables in number your trying 
to assign them too.  Below are the lines in reading in:

line 3 - 19.18    29.15    78.75    212.10
line 4 - 100    20    410.29   

And this is the code I'm using:

    #read withdrawls from file on line3
    line = infile.readline()
   
    #split withdrawls up
    withdraw1, withdraw2, withdraw3, withdraw4 = string.split(line, "\t")

    #read deposits from file on line4
    line = infile.readline()
    #split deposits up
    deposit1, deposit2, deposit3 = string.split(line, "\t")

I have 4 strings to match line 3 and 3 to match the 3 on line 4...any 
thoughts?

thx



From pablo at decode.com.ar  Wed Sep 26 13:00:09 2007
From: pablo at decode.com.ar (Pablo Ziliani)
Date: Wed, 26 Sep 2007 14:00:09 -0300
Subject: regex with specific list of string
In-Reply-To: <1190822055.3397.52.camel@dot.uniqsys.com>
References: <1190821357.753909.178210@50g2000hsm.googlegroups.com>
	<1190822055.3397.52.camel@dot.uniqsys.com>
Message-ID: <46FA9019.90402@decode.com.ar>

Carsten Haese wrote:
> On Wed, 2007-09-26 at 15:42 +0000, james_027 wrote:
>   
>> hi,
>>
>> how do I regex that could check on any of the value that match any one
>> of these ... 'jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug',
>> 'sep', 'oct', 'nov', 'dec'
>>     
>
> Why regex? You can simply check if the given value is contained in the
> set of allowed values:
>
>   
>>>> s = set(['jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug',
>>>>         
> 'sep', 'oct', 'nov', 'dec'])
>   
>>>> 'jan' in s

Also, check calendar for a locale aware (vs hardcoded) version:

>>> import calendar
>>> [calendar.month_abbr[i].lower() for i in range(1,13)]
['jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug', 'sep', 'oct', 'nov', 'dec']

If you still want to use regexes, you can do something like:
>>> import re
>>> pattern = '(?:%s)' % '|'.join(calendar.month_abbr[1:13])
>>> pattern
'(?:Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)'
>>> re.search(pattern, "we are in september", re.IGNORECASE)
<_sre.SRE_Match object at 0xb7ced640>
>>> re.search(pattern, "we are in september", re.IGNORECASE).group()
'sep'

If you want to make sure that the month name begins a word, use the following pattern instead:
>>> pattern = r'(?:\b%s)' % r'|\b'.join(calendar.month_abbr[1:13])
>>> pattern
'(?:\\bJan|\\bFeb|\\bMar|\\bApr|\\bMay|\\bJun|\\bJul|\\bAug|\\bSep|\\bOct|\\bNov|\\bDec)'

If in doubt, Google for "regular expressions in python" or go to http://docs.python.org/lib/module-re.html


Regards,
Pablo



From steve at REMOVE-THIS-cybersource.com.au  Mon Sep 10 11:01:32 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Mon, 10 Sep 2007 15:01:32 -0000
Subject: How do I read and write to the same CSV file
References: <1189434466.001109.313060@d55g2000hsg.googlegroups.com>
Message-ID: <13ean2c2ip6i153@corp.supernews.com>

On Mon, 10 Sep 2007 07:27:46 -0700, Chris wrote:

> I want to update one field in a row for a csv file. So far my code looks
> something like this
> 
> cf_stream = open("\\config.csv","r+") 
> csv_file = csv.DictReader(cf_stream, ['Algorithm','LastModified'])
> 
> and then I know I can do something like this
> 
> for row in csv_file
>       name = row["Algorithm"]
>       date = row["LastModified"]
> 
> now what I want is something like this
> 
> if date == 0:
>       date = os.getmtime()
>       # now this is where I want to write into the row of the same csv
> file but only updating that one field
> 
> How can I do this?

With difficulty unless the bytes you are writing to are exactly the same 
length as the bytes that were there before.

In my opinion, unless you're writing a file with fixed-length fields, and 
maybe not even then, give up the dream of writing directly in place. 
Unless your file is HUGE, the chances are that trying to modify it in 
place is not only harder work but also slower.

But if you insist... you might be able to use cf_stream.seek() to move to 
the current position in the file, then write the bytes you want. How do 
you find the current position? Black magic or voodoo might help. 
Otherwise you might count every character of every line up to the field 
you want. Don't forget delimiters, quote marks and newlines. Good luck.



-- 
Steven.


From python at cx.hu  Wed Sep  5 19:19:28 2007
From: python at cx.hu (Ferenczi Viktor)
Date: Thu, 6 Sep 2007 01:19:28 +0200
Subject: Any syntactic cleanup likely for Py3? And what about doc
	standards?
In-Reply-To: <87tzq898e2.fsf@wilson.homeunix.com>
References: <46DEFD2E.5050205@sbcglobal.net>
	<mailman.112.1189022368.2658.python-list@python.org>
	<87tzq898e2.fsf@wilson.homeunix.com>
Message-ID: <200709060119.28607.python@cx.hu>

Hello,

> > from property_support import hasProperties, Property
> >
> > @hasProperties
> > class Sphere(object):
> >     def setRadius(self, value):
> >         ... some setter implementation ...
> >     radius=Property(default=1.0, set=setRadius, type=(int, float))
> >     color=Property(default='black', allowNone=True)
> >
> > This is a cleaner syntax if you need automatic default
> > setter/getter implementations with type checking, default values,
> > etc.
>
> Well, I think @hasProperties is very ugly.  Such things always look
> like a dirty trick.  The programmer wonders why the language cannot
> detect by itself that there are properties in this class.

If you do not include the @hasProperties class decorator, then 
radius=Property(...) means that radius is a class attribute with a Property 
instance as it's value, nothing special. If you also include the class 
decorator, then it takes an additional meaning. In this case the decorator 
should remove the Property instance from the class and turn it into a real 
property. This is not magic. This is a possible use case of the new class 
decorator feature.

Properties are very useful, since ordinary attribute access can be 
transparently replaced with properties if the developer needs to add code 
when it's set or needs to calculate it's value whenever it is read.

As an additional benefit this could allow developers to implement change 
events for properties that allows any number of observers to monitor property 
changes. This could be very useful in GUI programming, for example.

Regards, Viktor


From rodney.maxwell at gmail.com  Sat Sep 15 11:44:36 2007
From: rodney.maxwell at gmail.com (Rodney Maxwell)
Date: Sat, 15 Sep 2007 15:44:36 -0000
Subject: Extended slicing and Ellipsis - where are they used?
In-Reply-To: <fcclfe$ur6$1@daisy.noc.ucla.edu>
References: <1189699345.436400.233460@g4g2000hsf.googlegroups.com>
	<fcclfe$ur6$1@daisy.noc.ucla.edu>
Message-ID: <1189871076.796975.321460@19g2000hsx.googlegroups.com>

On Sep 13, 5:50 pm, James Stroud <jstr... at mbi.ucla.edu> wrote:
> Rodney Maxwell wrote:
> > The following are apparently legal Python syntactically:
> >    L[1:3, 8:10]
> >    L[1, ..., 5:-2]
>
> > But they don't seem to work on lists:
> >>>> l = [0,1,2,3]
> >>>> l[0:2,3]
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in <module>
> > TypeError: list indices must be integers
> >>>> l[...]
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in <module>
> > TypeError: list indices must be integers
>
> > So where is this extended slicing used?
>
> AFAICT this syntax is not used in the standard library. However, the
> mega-beauty of it is that you can make use of it in your own classes:
>
> py> class Bob(list):
> ...   def __getitem__(self, i):
> ...     try:
> ...       return [list.__getitem__(self, j) for j in i]
> ...     except TypeError:
> ...       return list.__getitem__(self, i)
> ...
> py> b = Bob(xrange(15, 30))
> py> b[3, 5, 7, 13]
> [18, 20, 22, 28]
>
> James

Or
>>> b[0:3, 5, 9]
[[15, 16, 17], 20, 24]

which is what I was looking for in the first place.

Thanks,
Rodney



From bdesth.quelquechose at free.quelquepart.fr  Sat Sep  1 14:12:23 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 01 Sep 2007 20:12:23 +0200
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
In-Reply-To: <1188743299.664137.194760@d55g2000hsg.googlegroups.com>
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
	<1188735642.391419.103650@19g2000hsx.googlegroups.com>
	<1188740716.423349.304370@y42g2000hsy.googlegroups.com>
	<1188743299.664137.194760@d55g2000hsg.googlegroups.com>
Message-ID: <46daeaec$0$19889$426a74cc@news.free.fr>

Ivan Wang a ?crit :
> On Sep 2, 9:45 pm, jwrweather... at gmail.com wrote:
> 
>>[snip code]
>>
>>Thanks for that. I realise that improving the algorithm will speed
>>things up. I wanted to know why my less than perfect algorithm was so
>>much slower in python than exactly the same algorithm in C. Even when
>>turning off gcc's optimiser with the -O0 flag, the C version is still
>>
>>
>>
>>
>>>100 times quicker.- Hide quoted text -
>>
>>- Show quoted text -
> 
> Maybe Python is  the slowest programming language in the world.
> So there is a joke: some python hater said that "python" can only
> crawl rather than run. :)
> 
> Python is slow because:
> (1) dynamic binding
Yes.
> (2) it is a interpretation language
Not quite. It's compiled to byte-code - just like Java (would you call 
Java an 'interpreted language' ?)


From ricaraoz at gmail.com  Thu Sep 20 09:50:49 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Thu, 20 Sep 2007 10:50:49 -0300
Subject: re question
In-Reply-To: <d6944c490709190517t390086d4m915b77b1cef5055a@mail.gmail.com>
References: <d6944c490709190517t390086d4m915b77b1cef5055a@mail.gmail.com>
Message-ID: <46F27AB9.8060007@bigfoot.com>

Dan Bar Dov wrote:
> I'm trying to construct a regular expression to match valid IP address,
> without leading zeroes (i.e
> 1.2.3.4 <http://1.2.3.4>, 254.10.0.0 <http://254.10.0.0>, but not
> 324.1.1.1, nor 010.10.10.1 <http://010.10.10.1>)
> 
> This is what I come up with, and it does not work.
> 
> r'(^[12]?\d{0,2}\.){3,3}[12]?\d{0,2}'
> 
> What am I doing wrong?
> Any common knowledge IP matching RE?
> 
> Thanks,
> Dan
> 

r'^[12]\d?\d?.\d{1,3}.\d{1,3}.\d{1,3}$'

HTH



From fredrik at pythonware.com  Wed Sep 26 04:20:07 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 26 Sep 2007 10:20:07 +0200
Subject: elementtree question
In-Reply-To: <46F76F86.6010307@web.de>
References: <fd0lmi$pm8$1@foggy.unx.sas.com> <46F76F86.6010307@web.de>
Message-ID: <fdd4nn$vtu$1@sea.gmane.org>

Stefan Behnel wrote:

> ET 1.3 will also support the extend() function, BTW.

div.extend(seq) can be trivially rewritten as

     div[len(div):] = seq

and in this case, you know that len(div) is 0, so you can simply do:

     div[:] = seq

(this recent lxml habit of using lxml-specific versions of things that 
are trivial to do with the standard API is a bit disappointing.  kind of 
defeats the purpose of having a standard API...)

</F>



From frank at chagford.com  Thu Sep 13 01:20:38 2007
From: frank at chagford.com (Frank Millman)
Date: Wed, 12 Sep 2007 22:20:38 -0700
Subject: Is the wxPython list down?
In-Reply-To: <mailman.442.1189610419.2658.python-list@python.org>
References: <1189602607.803546.180320@w3g2000hsg.googlegroups.com>
	<1189603681.292154.186620@o80g2000hse.googlegroups.com>
	<mailman.442.1189610419.2658.python-list@python.org>
Message-ID: <1189660838.832494.15000@d55g2000hsg.googlegroups.com>

Chris Mellon wrote:

> Frank Millman wrote:
> > I noticed that cvs seems to be down as well - maybe it was on the same
> > server.
>
> CVS is down because wx has moved to SVN, which is still up and running
> fine. svn.wxwidgets.org.

Thanks, Chris, I found it.

However, the 'Browse sources' link on wxPython's home page still
points to cvs.

If the problem still exists when the mail list comes back up I will
report it there.

Frank



From phil at freehackers.org  Mon Sep 17 07:03:41 2007
From: phil at freehackers.org (BlueBird)
Date: Mon, 17 Sep 2007 04:03:41 -0700
Subject: Reading text files where last line has no EOL
Message-ID: <1190027021.235110.286450@g4g2000hsf.googlegroups.com>

I tried and failed to read text files where the last line does not
contain proper EOL. For my tests, I use a file that I create with the
equivalent of :

open('toto', 'w').write( '1234\n4567\n89AB' )


My reading code looks like this :

       l = f.readline()
        while len(l):
            self.appendLine( l )
            l = f.readline()

The last line is not returned (89AB) is never returned.

I tried with "for l in f" with similar results.

I read the doc :

In order to make a for loop the most efficient way of looping over the
lines of a file (a very common operation), the next() method uses a
hidden read-ahead buffer. As a consequence of using a read-ahead
buffer, combining next() with other file methods (like readline())
does not work right. However, using seek() to reposition the file to
an absolute position will flush the read-ahead buffer. New in version
2.3.

I've tried to do a f.seek( f.tell() ) but that did not help.

So how am I supposed to fetch that last line ?



From afriere at yahoo.co.uk  Mon Sep 10 20:53:10 2007
From: afriere at yahoo.co.uk (Asun Friere)
Date: Mon, 10 Sep 2007 17:53:10 -0700
Subject: /dev/null as a file-like object, or logging to nothing
In-Reply-To: <fc4n48$s40$2@lust.ihug.co.nz>
References: <87k5r1jdzq.fsf@wilson.homeunix.com>
	<5kg48jF33dv5U3@mid.uni-berlin.de>
	<87fy1pjbpl.fsf@wilson.homeunix.com>
	<uxv*tevUr@news.chiark.greenend.org.uk>
	<fc4n48$s40$2@lust.ihug.co.nz>
Message-ID: <1189471990.613993.144130@d55g2000hsg.googlegroups.com>

On Sep 11, 10:22 am, Lawrence D'Oliveiro <l... at geek-
central.gen.new_zealand> wrote:
> In message <uxv*te... at news.chiark.greenend.org.uk>, Sion Arrowsmith wrote:
>
> > Torsten Bronger  <bron... at physik.rwth-aachen.de> wrote:
>
> > Windows has a NUL: device which behaves like /dev/null .
>
> It's not a device, it's a reserved file name. Or rather, a reserved file
> name prefix: any attempt to open a file name beginning with NUL, e.g.
> NUL.DAT, will cause your output to disappear into a black hole.

Yes Windows and its whacky error messages.  While trying to save a
Word doc as 'NUL.doc' I got this error message: "The file name
'NUL.doc' is a reserved device name."  It's no wonder some might
mistake it for a device!




From vinay_sajip at yahoo.co.uk  Thu Sep 13 08:24:03 2007
From: vinay_sajip at yahoo.co.uk (Vinay Sajip)
Date: Thu, 13 Sep 2007 05:24:03 -0700
Subject: customizing a logging logger
In-Reply-To: <1189621071.960166.30490@22g2000hsm.googlegroups.com>
References: <1187412814.493872.325190@j4g2000prf.googlegroups.com>
	<1189527296.426004.17600@19g2000hsx.googlegroups.com>
	<1189615607.631091.214240@o80g2000hse.googlegroups.com>
	<1189621071.960166.30490@22g2000hsm.googlegroups.com>
Message-ID: <1189686243.335406.79220@22g2000hsm.googlegroups.com>

On 12 Sep, 19:17, garyjefferson... at gmail.com wrote:
> It seems like using something other than a literal string in the
> message is the way to go, since I assume that its __repr__() won't get
> called unless the logger is actually going to log a message for it.
> Is that right?
>
> Are any of the other methods likely to provide as-good or better
> performance?

You're almost right - it's __str__() rather than __repr__() that gets
called, when str() is called on the msg object passed in the logging
call. The str() call happens in LogRecord.getMessage(), which is
called (indirectly) from a handler's emit() when the message needs to
be formatted.

So - I don't think that the other methods will provide better
performance, as this approach is the simplest and most direct. I
haven't done any tests to confirm this, though :-(

Note that in order to avoid computation of *other* data passed to the
logging call - i.e. other arguments - you should still use the
logger.isXXXEnabled() idiom to avoid unnecessary computation, where
performance is an issue.

Best regards,


Vinay Sajip



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Tue Sep 25 05:34:26 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Tue, 25 Sep 2007 11:34:26 +0200
Subject: An Editor that Skips to the End of a Def
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk> <fd0au1$fro$1@lust.ihug.co.nz>
	<5lhs4pF8bkunU1@mid.individual.net> <fd4168$ige$1@lust.ihug.co.nz>
	<slrnfff9op.1is.horpner@FIAD06.norwich.edu>
	<fd9ncb$q3l$1@lust.ihug.co.nz>
Message-ID: <5ls313F9ndm1U1@mid.individual.net>

Lawrence D'Oliveiro wrote:
> That's like saying, about a program that, when given "2 + 2",
> outputs "5", that _of course_ it knows the correct answer is "4",
> it just chooses to "modify" the answer before outputting it.

No. Which laws say how transitions between modes have to be? Thus, I
know laws saying 2 and 2 is 4.
 
> Why does it "choose" to modify your position when you exit insert
> mode? Does the phrase "broken as designed" mean anything to you?

Does the phrase "everything I don't like is stupid" mean anything to
you? Honestly, if you don't like it, either propose improvement or
stop using it (and complaining about it). Your preference with user
interfaces is obviously different. (Personally, I prefer single
strokes to breaking my fingers with Esc-Meta-Alt-Control-Shift.
:) )
 
> Why do you need so many ways to enter insert mode?

It can be convenient. For you apprently not, though.
 
> And the downside is that the largest single proportion of those
> commands end up being variations on "enter insert mode". Because
> most of the keystrokes you enter during an editing session are in
> fact text to be input into the file, not commands to manipulate
> that text. 

Strange -- mostly, this is not the case for me. When refactoring
code for example, I jump around, copy, paste and modify many times.

> So in a modal editor, having to jump in and out of insert mode all
> the time just adds to the number of keystrokes you have to type.

Much better than accessing special functions with finger breaking
key combinations. IMHO.

Regards,


Bj?rn

-- 
BOFH excuse #226:

A star wars satellite accidently blew up the WAN.



From meesters at uni-mainz.de  Thu Sep 27 03:09:04 2007
From: meesters at uni-mainz.de (Christian Meesters)
Date: Thu, 27 Sep 2007 09:09:04 +0200
Subject: strange behavious of the logging module?
References: <fd6n9i$8hc$1@news1.zdv.uni-mainz.de>
	<fd7nf6$g14$02$1@news.t-online.com>
	<1190643051.084144.230220@o80g2000hse.googlegroups.com>
	<fd8l4n$9o1$03$1@news.t-online.com>
	<1190672978.233964.232900@g4g2000hsf.googlegroups.com>
	<fdaepi$k6m$00$1@news.t-online.com>
	<fdaga7$e7j$1@news1.zdv.uni-mainz.de>
	<fdahi5$4e4$03$2@news.t-online.com>
	<1190723915.218110.170720@k79g2000hse.googlegroups.com>
Message-ID: <fdfkug$la8$1@news1.zdv.uni-mainz.de>

Thanks Peter and Vinay,

I finally understood.
And indeed, removing the pyc-file in questions solves the problem - at least
temporarily. 

Christian



From hniksic at xemacs.org  Tue Sep  4 12:34:12 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Tue, 04 Sep 2007 18:34:12 +0200
Subject: Printing lists in columns
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<mailman.315.1188810174.28954.python-list@python.org>
	<46dbd11e$0$6228$426a74cc@news.free.fr>
	<mailman.317.1188812089.28954.python-list@python.org>
	<1188816626.021956.281040@22g2000hsm.googlegroups.com>
	<5k2cjmF1r2aiU1@mid.uni-berlin.de>
	<1188836008.656284.76160@o80g2000hse.googlegroups.com>
	<46dc6f49$0$6207$426a34cc@news.free.fr>
	<1188900397.459760.259580@k79g2000hse.googlegroups.com>
	<slrnfdqe3t.i4p.hat@se-162.se.wtb.tue.nl>
	<Xns99A17FAC2587duncanbooth@127.0.0.1>
	<1188906767.737741.267350@19g2000hsx.googlegroups.com>
	<Xns99A18F8C528BCduncanbooth@127.0.0.1>
	<1188913394.763871.218660@d55g2000hsg.googlegroups.com>
	<46dd69b1$0$24998$426a74cc@news.free.fr>
	<1188917550.261894.84010@k79g2000hse.googlegroups.com>
Message-ID: <87wsv6bda3.fsf@mulj.homelinux.net>

cjt22 at bath.ac.uk writes:

>> for row in izip_longest(*d, fillvalue='*'):
>>      print ', '.join(row)
>>
>> HTH
>
> I thought that but when I tried it I recieved a
> "Syntax Error: Invalid Syntax"
> with a ^ pointing to fillvalue :S

Python isn't too happy about adding individual keyword arguments after
an explicit argument tuple.  Try this instead:

for row in izip_longest(*d, **dict(fillvalue='*')):
     print ', '.join(row)


From stodge at gmail.com  Mon Sep 17 08:38:52 2007
From: stodge at gmail.com (Stodge)
Date: Mon, 17 Sep 2007 05:38:52 -0700
Subject: Saving parameters between Python applications?
In-Reply-To: <mailman.624.1189977946.2658.python-list@python.org>
References: <1189969538.830532.98840@g4g2000hsf.googlegroups.com>
	<mailman.624.1189977946.2658.python-list@python.org>
Message-ID: <1190032732.277479.221680@o80g2000hse.googlegroups.com>

Good idea, but I can't guarantee that the two scripts will be run from
the same directory - so where to store the pickle?

On Sep 16, 5:25 pm, "Sebastian Bassi" <sba... at clubdelarazon.org>
wrote:
> On 9/16/07, Stodge <sto... at gmail.com> wrote:
>
> > python app1.py --location=c:\test1
> > What I want to do is save the location parameter, so I can then do (in
> > the same window):
> > python app2.py
> > And have app2.py automatically have access to the value of "location".
>
> Do app1.py to save a pickle of the value you want app2 to read.
>
> --
> Sebasti?n Bassi (       ). Diplomado en Ciencia y Tecnolog?a.
> Curso Biologia molecular para programadores:http://tinyurl.com/2vv8w6
> GPG Fingerprint: 9470 0980 620D ABFC BE63 A4A4 A3DE C97D 8422 D43D



From __peter__ at web.de  Sat Sep  8 03:58:33 2007
From: __peter__ at web.de (Peter Otten)
Date: Sat, 8 Sep 2007 09:58:33 +0200
Subject: unexpected behavior: did i create a pointer?
References: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>
	<46e11dfe$0$4517$9b4e6d93@newsspool3.arcor-online.net>
	<pan.2007.09.07.10.40.46@REMOVE.THIS.cybersource.com.au>
	<46e15959$0$16104$9b4e6d93@newsspool1.arcor-online.net>
	<13e3rd38ijilebd@corp.supernews.com>
Message-ID: <fbtkn9$um3$02$1@news.t-online.com>

Am Sat, 08 Sep 2007 00:32:35 +0000 schrieb Steven D'Aprano:

> On Fri, 07 Sep 2007 15:59:53 +0200, Wildemar Wildenburger wrote:
> 
>> I just thought I'd go along with the analogy the OP created as that was
>> his mindset and it would make things easier to follow if I didn't try to
>> forcibly change that.
> 
> My reaction to somebody trying to reason with the wrong analogy is to 
> teach them the right analogy, not to tell them they got it right when 
> they actually got it wrong.
> 
> "My car won't start -- I must not have stirred the gasoline enough before 
> baking it."
> 
> "Yes, that's right. It's very important to stir the gasoline fully so 
> that all the ingredients are fully mixed."

I think Wildemar is too defensive. The pointer "analogy" is a good first
approximation, not cargo cult.

Peter


From nfrancken at gmail.com  Thu Sep  6 18:29:58 2007
From: nfrancken at gmail.com (windandwaves)
Date: Thu, 06 Sep 2007 15:29:58 -0700
Subject: why should I learn python
In-Reply-To: <LC_Di.8274$924.7987@newssvr23.news.prodigy.net>
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
	<LC_Di.8274$924.7987@newssvr23.news.prodigy.net>
Message-ID: <1189117798.506367.278560@y42g2000hsy.googlegroups.com>

On Sep 7, 9:50 am, James Stroud <jstr... at mbi.ucla.edu> wrote:
> Seewww.python.org. Trust us all when we say that its the best.
>

I get that feeling - yes.  Question is:

1. what is it good for?
2. why is it so good?

I would love to hear some opinions.

Cheers

Nicolaas



From horpner at yahoo.com  Wed Sep 19 10:18:20 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Wed, 19 Sep 2007 14:18:20 GMT
Subject: super() doesn't get superclass
References: <8764281uea.fsf@benfinney.id.au> <876427zhzq.fsf@benfinney.id.au>
	<13f196qktorgc88@corp.supernews.com>
	<873axbxl2f.fsf@benfinney.id.au>
	<MKD*JIeVr@news.chiark.greenend.org.uk>
	<1190209294.584372.173410@o80g2000hse.googlegroups.com>
Message-ID: <slrnff2c41.1sg.horpner@FIAD06.norwich.edu>

On 2007-09-19, Michele Simionato <michele.simionato at gmail.com> wrote:
> On Sep 19, 3:22 pm, Sion Arrowsmith <si... at chiark.greenend.org.uk>
> wrote:
>> Ben Finney  <bignose+hates-s... at benfinney.id.au> wrote:
>>
>> > If a function is named 'super' and operates on
>> >classes, it's a pretty strong implication that it's about
>> >superclasses.
>>
>> But it doesn't (under normal circumstances) operate on classes.
>> It operates on an *instance*. And what you get back is a (proxy
>> to) a superclass/ancestor of the *instance*.
>>
>> (And in the super(A, B) case, you get a superclass/ancestor of
>> *B*. As has just been said somewhere very near here, what is
>> misleading is the prominence of A, which isn't really the most
>> important class involved.)
>>
>
> Happily A (and B too) will become invisible in Python 3000.

Nobody will miss A, but doesn't making B invisible recreate the
current mystery in a new form? We want to get rid of A because it
isn't possible to avoid repeating ourselves. But self is usually
easily available and helps define what's happening.

  super.foo()

to me, is even more confusing.

  self.super.foo()

or

  super(self).foo()

seem like improvements. Unfortunately, neither is one of the
current alternate proposals. The closest competing proposal in
PEP3135 is:

  self.__super__.foo()

That syntax seems justified given the specialized application and
involved pitfalls of super that you disclosed in your article.

-- 
Neil Cerutti
These people haven't seen the last of my face. If I go down, I'm going down
standing up. --Chuck Person


From infinioninternational at gmail.com  Tue Sep 11 10:39:38 2007
From: infinioninternational at gmail.com (anky)
Date: Tue, 11 Sep 2007 07:39:38 -0700
Subject: Make money to share photos
Message-ID: <1189521578.357813.39540@d55g2000hsg.googlegroups.com>

Make money to share photos
Do you want to make money to post photos from internet.then just move
on to http://goodtolove.com and start posting.They will pay their 50%
adsense revenue with you...Then what are you waiting for just start
posting photos in http://goodtolove.com.



From paul.hankin at gmail.com  Wed Sep 26 07:14:57 2007
From: paul.hankin at gmail.com (Paul Hankin)
Date: Wed, 26 Sep 2007 11:14:57 -0000
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <Xns99B760A3F5859duncanbooth@127.0.0.1>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>
	<1190753722.026806.254530@d55g2000hsg.googlegroups.com>
	<1190756003.292096.71130@o80g2000hse.googlegroups.com>
	<1190789981.385466.37870@57g2000hsv.googlegroups.com>
	<Xns99B760A3F5859duncanbooth@127.0.0.1>
Message-ID: <1190805297.182232.116830@50g2000hsm.googlegroups.com>

On Sep 26, 9:31 am, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> Mark Summerfield <m.n.summerfi... at googlemail.com> wrote:
> > As you've no doubt realised, this particular implementation gives best
> > performance when the pattern of use is: lots of edits, lots of
> > lookups, ..., and gives worst performance when the pattern of use is:
> > edit, lookup, edit, lookup (in which case using a dict and sorted() is
> > probably better).
>
> > So there is lots of scope for someone to do a version that has good
> > performance for all patterns of use:-)
>
> I that's the point though: you can't write one implementation that has good
> performance for all patterns of use: you have to either compromise on
> performance somewhere, or use an implementation specifically matched to
> your use case.
>
> For example, if the use case was some updates followed by iterating over
> the first few keys only, it may be faster to use a heap for iteration.
>
> I suspect that for many use patterns you could improve performance
> significantly by having two levels of invalidation for the the key list: in
> __setitem__, if the key already exists you don't need to discard the list
> in __keycache (although if a key or cmp function was provided it may no
> longer be sorted). In that case it might be worthwhile keeping __keycache
> but flagging it as needing to be sorted again next time it is used. Given
> that Python's sort is very fast on sorted or nearly sorted lists this could
> provide a worthwhile speedup for cases where the values change but the keys
> don't change often.

More flexibly, keep a set of inserted keys that haven't yet been
included in the sorted list, and a set of deleted keys that haven't
yet been removed from the sorted list. The cache is invalid if either
of these sets are empty - and to make it valid you can choose what to
do based on the sizes of the two sets (and the sorted list). For
instance, if there's just been one insertion you're probably better
doing an insertion rather than a full resort. Of course, there's a few
nasty cases here but it's always possible to just throw away the
sorted list and reconstruct it from the dict keys when things get too
hairy (eg, the user deletes a key that's in the inserted-but-not-yet-
sorted set).

--
Paul Hankin



From truelixin at gmail.com  Thu Sep  6 01:50:40 2007
From: truelixin at gmail.com (truelixin at gmail.com)
Date: Wed, 05 Sep 2007 22:50:40 -0700
Subject: Using wild character
In-Reply-To: <1189054805.447871.213150@y42g2000hsy.googlegroups.com>
References: <1189054805.447871.213150@y42g2000hsy.googlegroups.com>
Message-ID: <1189057840.948838.60270@19g2000hsx.googlegroups.com>

i will this may help you.

countries = ["india","africa","atlanta","artica","nigeria"]
filter(lambda country: country.startswith('a'), countries)



From hassen62 at voila.fr  Mon Sep 17 21:29:59 2007
From: hassen62 at voila.fr (hassen62 at voila.fr)
Date: Tue, 18 Sep 2007 03:29:59 +0200 (CEST)
Subject: using xlrd
Message-ID: <14368282.847261190078999740.JavaMail.www@wwinf4603>

Hi,
I have installed Xlrd 0.6.1 Win 32. I have a file xls say "file.xls" located as follows:c:/file.xls. This file is composed with two columns of 5 lines. These columns are headed with "Col1" and "Col2", also the 5 rows are named with "Row1",...,"Row2".
I have a silly question: What I can write to read this file from The Shell? sorry for this basic question but I can't find a document in the net that helps me for using xlrd.
Thank you very much,
Hassen.
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From rcdailey at gmail.com  Mon Sep 24 22:17:59 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Mon, 24 Sep 2007 21:17:59 -0500
Subject: Regular Expressions: Can't quite figure this problem out
In-Reply-To: <op.ty6tjyfqx6zn5v@gabriel2.softlabbsas.com.ar>
References: <496954360709241737o6e42e7efk29886b5631f6ca2e@mail.gmail.com>
	<a49e45f50709241827i107d0acav28431853ef403702@mail.gmail.com>
	<496954360709241853w6bb6e813ved0ec4fc80304d51@mail.gmail.com>
	<op.ty6tjyfqx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <496954360709241917m3801e4aavee29cfef7deaf41b@mail.gmail.com>

On 9/24/07, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>
> Yes: forget about regular expressions. ElementTree does that for free:
>

That's not an option.
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From stefan.behnel-n05pAM at web.de  Wed Sep 12 08:14:36 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Wed, 12 Sep 2007 14:14:36 +0200
Subject: Python 3K or Python 2.9?
In-Reply-To: <5kq1hgF4r90oU1@mid.individual.net>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
Message-ID: <46E7D82C.40302@web.de>

Bjoern Schliessmann wrote:
>> What does "self" have to do with an object model? It's an
>> function/method argument that might as well be hidden in the
>> compiler without ever touching the role it has (if not, why?). I
>> agree that it's needless noise in a language.
> 
> If this was needless, why do C++ and Java have the "this" pointer?

Be careful when you use the word "needless" in the context of Java.

Stefan


From anitnair at gmail.com  Tue Sep  4 09:32:47 2007
From: anitnair at gmail.com (AniNair)
Date: Tue, 04 Sep 2007 06:32:47 -0700
Subject: REGULAR EXPRESSION
Message-ID: <1188912767.360967.306050@y42g2000hsy.googlegroups.com>

hi.. I am trying to match '+ %&/-' etc using regular expression  in
expressions like 879+34343. I tried \W+   but it matches only in the
beginning of the string Plz help Thanking you in advance...



From gagsl-py2 at yahoo.com.ar  Thu Sep 20 01:48:56 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 20 Sep 2007 02:48:56 -0300
Subject: Memory Problem
References: <mailman.710.1190118615.2658.python-list@python.org>
	<200709181558.43026.cscheit@lstm.uni-erlangen.de>
	<op.tyutklkdx6zn5v@a98gizw.cpe.telecentro.net.ar>
	<200709181724.46141.cscheit@lstm.uni-erlangen.de>
Message-ID: <op.tyxufuodx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 18 Sep 2007 12:24:46 -0300, Christoph Scheit  
<cscheit at lstm.uni-erlangen.de> escribi?:

>> >> >  # add row i and increment number of rows
>> >> >  self.rows.append(DBRow(self, self.nRows))
>> >> >  self.nRows += 1
>>
>> This looks suspicious, and may indicate that your structure contains
>> cycles, and Python cannot always recall memory from those cycles, and  
>> you
>> end using much more memory than needed.
>
> How can I detect if there are cycles?

Analyzing your code, or maybe inspecting gc.garbage, or looking at  
sys.getrefcount(x)

> self.rows is a list containing DBRow-objects,
> each itself being an integer pointer (index) to the i-th row.
> Im using this list in order to sort the table by sorting the index-list
> instead of realy sorting the entries. (or to filter).

What looks strange is the "self" argument to DBRow, since the items are  
already contained in self.rows
But it's hard to tell anything more without looking at your code.

-- 
Gabriel Genellina



From jcd at sdf.lonestar.org  Mon Sep 10 06:40:27 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Mon, 10 Sep 2007 06:40:27 -0400
Subject: Python syntax wart
In-Reply-To: <46E51EAB.4030808@sdf.lonestar.org>
References: <fbvvil$7dj$1@lust.ihug.co.nz> <5khuq4F3ij9eU1@mid.individual.net>
	<fc2bvf$i1l$2@lust.ihug.co.nz> <46E51EAB.4030808@sdf.lonestar.org>
Message-ID: <46E51F1B.5090008@sdf.lonestar.org>

J. Cliff Dyer wrote:
> Lawrence D'Oliveiro wrote:
>> In message <5khuq4F3ij9eU1 at mid.individual.net>, Bjoern Schliessmann wrote:
>>
>>   
>>> What's wrong with this:
>>>
>>> for Link in GetEachRecord(
>>>     
>>
>> Then you're no longer showing the syntax structure in two dimensions.
>>
>>   
> If somebody handed me a program of more than twenty five lines that 
> was formatted "two dimensionally" as you call it, and asked me to deal 
> with it, the first thing I would do is reformat the code  so a not to 
> be so hideously ugly.  Your style has the unfortunate consequence of 
> requiring the reader to scroll ridiculous distances, making it more 
> difficult to maintain.  I do see the benefit of using multiple lines 
> on complex statements, such as:
>
> if (actor == 'Tony Leung'
>         or actor == 'Alec Baldwin'
>         or actor == 'Divine'
>         or actor == 'Fitty-cent'
>         or actor == 'Sir Ian McKellen'):
>     go_see_the_movie()
>
> but even here, there is some attempt to keep things compact by making 
> each line meaningful.
>
> However, I utterly fail to see how putting the word "or" on its own 
> line, (or worse: "if!") clarifies things in the slightest. 
>
> Part of the point of designing python with a line break as the 
> statement closer is to encourage you to write in a style that treats 
> each line as a statement.  Changing the syntax to encourage people to 
> violate this principle would not be an improvement to the design, but 
> a relinquishing of basic principles.  Obviously there are some cases 
> where you want to do something different, but that's what backslashes 
> are for.  Frankly, I find your code just as ugly without the 
> backslashes as it is with them.
>
> Cheers,
> Cliff
>

I replied to poster instead of to list.  My apologies.
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From ptmcg at austin.rr.com  Sun Sep  9 00:27:45 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Sat, 08 Sep 2007 21:27:45 -0700
Subject: Parsing nested constructs
In-Reply-To: <46e361f3$0$7695$9b4e6d93@newsspool2.arcor-online.net>
References: <46e308d3$0$9153$426a74cc@news.free.fr>
	<1189296638.625012.286250@k79g2000hse.googlegroups.com>
	<46e361f3$0$7695$9b4e6d93@newsspool2.arcor-online.net>
Message-ID: <1189312065.599420.218470@w3g2000hsg.googlegroups.com>

On Sep 8, 10:01 pm, Wildemar Wildenburger
<lasses_w... at klapptsowieso.net> wrote:
>
> Again pyparsing to the rescue :)
>
> I have to do a parsing project in Java right now and I dearly miss
> pyparsing. I explained it to the guy I'm working for, and he was pretty
> impressed.
>
> Thought that might make you smile.
>
> /W

Wildemar -

Thanks for such a glowing testimonial! It really is a boost of
encouragement when I find projects that are using pyparsing, or see
postings on c.l.py or the tutor list (by people other than me!)
recommending using pyparsing in response to someone's post.

I'm glad you find pyparsing so useful in your Python endeavors.

-- Paul



From grante at visi.com  Thu Sep 13 11:35:27 2007
From: grante at visi.com (Grant Edwards)
Date: Thu, 13 Sep 2007 15:35:27 -0000
Subject: I want py2exe not to create library.zip
References: <mailman.452.1189627963.2658.python-list@python.org>
	<13egu7rmilu2ia4@corp.supernews.com>
	<mailman.475.1189677330.2658.python-list@python.org>
Message-ID: <13eim5vctdr00f5@corp.supernews.com>

On 2007-09-13, Laszlo Nagy <gandalf at designaproduct.biz> wrote:
>
>>> I want py2exe not to create library.zip.
>>>     
>>
>> setup (
>>        [...]
>>        options = {"py2exe": {"skip_archive":1}}
>>       )       
>
> Cool! Just what I needed. Where it is documented? Ah, in the source. :-)

That's pretty much it. :)

I found on WorkingWithVariousPackagesAndModules Wiki page a
reference to a command-line option --skip-archive.  Then
googling for "py2exe skip archive" found an example similar to
the above.  I haven't ever found any documentation for the
py2exe options.  The documentation for the some of general
setup options tends to be a bit vague as well.

I've added a few things to the py2exe Wiki pages, but somebody
needs to start a page that just describes each of the py2exe
options and what problem they're intended to solve...

-- 
Grant Edwards                   grante             Yow! Let's all show human
                                  at               CONCERN for REVERAND MOON's
                               visi.com            legal difficulties!!


From phil at riverbankcomputing.co.uk  Fri Sep 28 19:07:12 2007
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Sat, 29 Sep 2007 00:07:12 +0100
Subject: ANN: PyQt v4.3.1 Released
Message-ID: <200709290007.12197.phil@riverbankcomputing.co.uk>

Riverbank Computing is pleased to announce the release of PyQt v4.3.1 
available from http://www.riverbankcomputing.co.uk/pyqt/.

This is mainly a bug fix release.

A Windows installer is provided for the GPL version of PyQt which contains 
everything needed for PyQt development (including Qt, Qt Designer, Qwt, 
QScintilla and the eric IDE) except Python itself.

PyQt is a comprehensive set of Qt bindings for the Python programming language 
and supports the same platforms as Qt (Windows, Linux and MacOS/X).  Like Qt, 
PyQt is available under the GPL and a commercial license.

See http://www.riverbankcomputing.com/Docs/PyQt4/html/classes.html for the 
class documentation.

PyQt v4 supports Qt v4 (http://www.trolltech.com/products/qt/index.html).  
PyQt v3 is still available to support earlier versions of Qt.

PyQt v4 is implemented as a set of 11 extension modules containing 
approximately 400 classes and 6,000 functions and methods.

    QtCore
    The non-GUI infrastructure including event loops, threads, i18n, Unicode,
    signals and slots, user and application settings.

    QtGui
    A rich collection of GUI widgets.

    QtNetwork
    A set of classes to support TCP and UDP socket programming and higher
    level protocols (eg. HTTP, SSL).

    QtOpenGL
    A set of classes that allows PyOpenGL to render onto Qt widgets.

    QtScript
    A set of classes that implements a JavaScript interpreter.

    QtSql
    A set of classes that implement SQL data models and interfaces to industry
    standard databases.  Includes an implementation of SQLite.

    QtSvg
    A set of classes to render SVG files onto Qt widgets.

    QtTest
    A set of classes to automate unit testing of PyQt applications and GUIs.

    QtXML
    A set of classes that implement DOM and SAX parsers.

    QtAssistant
    A set of classes that enables the Qt Assistant online help browser to be
    integrated with an application.

    QAxContainer
    A set of classes for Windows that allows the integration of ActiveX
    controls and COM objects.

PyQt includes the pyuic4 utility which generates Python code to implement user 
interfaces created with Qt Designer in the same way that the uic utility 
generates C++ code.  It is also able to load Designer XML files dynamically.


From laurent.pointal at limsi.fr  Mon Sep 10 09:23:23 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Mon, 10 Sep 2007 15:23:23 +0200
Subject: XML: SAX and XInclude
Message-ID: <fc3ggb$obi$1@news2.u-psud.fr>

[python 2.5, Linux Mandriva 2007.1]

Hello,

does anybody know about an XML parser usable with the sax API (xml.sax) 
and with XInclude feature support (directly or via hacks).

With specifying nothing (default parser), it simply transmit xinclude 
elements (i tried to call parser on included file but it seem to be 
waiting for a complete document with root element).

I tried libxml2, but failed with error (cf at the end).

I tried xmlproc, but it simply transmit xinclude elements too.

Thanks (its for PQRC - I've a first xhtml production which is not bad, 
when it'll be ok I will work on OpenDocument XML production - and  would 
like to split PQRC xml source into several files).


A+

Laurent.



Problem with libxml2:
[laurent at litchi qrccompiler]$ python compiler.py
processing
Traceback (most recent call last):
   File "compiler.py", line 573, in <module>
     sys.exit(main(*sys.argv[1:]))
   File "compiler.py", line 569, in main
     handler.process_source()
   File "compiler.py", line 465, in process_source
     self.saxparser = make_parser(["libxml2"])
   File "/usr/lib/python2.5/site-packages/_xmlplus/sax/sax2exts.py", 
line 37,
in make_parser
     return XMLParserFactory.make_parser(parser_list)
   File "/usr/lib/python2.5/site-packages/_xmlplus/sax/saxexts.py", line 64,
in make_parser
     return self._create_parser(parser_name)
   File "/usr/lib/python2.5/site-packages/_xmlplus/sax/saxexts.py", line 43,
in _create_parser
     return drv_module.create_parser()
AttributeError: 'module' object has no attribute 'create_parser'



From wizzardx at gmail.com  Fri Sep 21 14:16:29 2007
From: wizzardx at gmail.com (David)
Date: Fri, 21 Sep 2007 20:16:29 +0200
Subject: Parameterize formatting string
In-Reply-To: <1190397297.236691.137220@19g2000hsx.googlegroups.com>
References: <1190397297.236691.137220@19g2000hsx.googlegroups.com>
Message-ID: <18c1e6480709211116v1c830409q306605e414102272@mail.gmail.com>

On 9/21/07, cyril giraudon <cyril.giraudon at gmail.com> wrote:
> Hello,
>
> I 'd like to know if a std::setw() equivalent function exists in
> python ?
>
> i thought of something like :
>
> a = 16
> "%ai" % 12
>
> But it is not correct.
>
> Any Idea ?

("%i" % 12).rjust(a)

Or, more ugly:

"%%%di" % a % 12

The first % (after quotes) builds this string: "%16i".
Then the second % operation converts that string to '              12'

See also: http://docs.python.org/tut/node9.html


From gandalf at shopzeus.com  Thu Sep  6 15:31:43 2007
From: gandalf at shopzeus.com (Laszlo Nagy)
Date: Thu, 06 Sep 2007 21:31:43 +0200
Subject: library to launch program in linux
In-Reply-To: <13e0itfgm0ida1c@corp.supernews.com>
References: <1189103678.484278.321650@r34g2000hsd.googlegroups.com>
	<13e0itfgm0ida1c@corp.supernews.com>
Message-ID: <46E0559F.5040704@shopzeus.com>

Grant Edwards wrote:
> On 2007-09-06, idzwan.nizam at gmail.com <idzwan.nizam at gmail.com> wrote:
>
>   
>> I'm a new user. What library should I use so that I can launch
>> program in linux using python? Thank you in advance.
>>     
>
> subprocess
>   
Hmm, there are some others. Here is a list:

os.system
os.popen (and os.popen2, os.popen3)
os.spawn
popen2 (the module)
subprocess (this is often preferred over other modules)

If you need to communicate with a subprocess using the system console, 
then possibly the third party pexpect module worth look at it.

If you need to use this on Windows then you can use the win32 extensions 
and "CreateProcess"...

I suggest that you read their documentation. Some of them are easy to 
use but feature less. Others are good for some purpose.

   Laszlo


p.s.: In Python "there should be only one obvious and correct way to do 
it". What??? :-)



From vinay_sajip at yahoo.co.uk  Wed Sep 12 12:46:47 2007
From: vinay_sajip at yahoo.co.uk (Vinay Sajip)
Date: Wed, 12 Sep 2007 09:46:47 -0700
Subject: customizing a logging logger
In-Reply-To: <1189527296.426004.17600@19g2000hsx.googlegroups.com>
References: <1187412814.493872.325190@j4g2000prf.googlegroups.com>
	<1189527296.426004.17600@19g2000hsx.googlegroups.com>
Message-ID: <1189615607.631091.214240@o80g2000hse.googlegroups.com>

On 11 Sep, 17:14, garyjefferson... at gmail.com wrote:
> What is the best way to do this, so that I don't have to manually put
> the self.ctx in the log string in hundreds of different places?
>

Another way is to generate your log messages via a factory method
which prepends the context: you can do this via a mixin, too.

def log_message(self, msg):
    return "%s: %s" % (self.ctx, msg)

Note also that in recent versions, an optional "extra" parameter can
be used, to pass info into the LogRecord.

See http://mail.python.org/pipermail/patches/2007-January/021535.html
which may be of some help - it's a similar use case.

Best regards,

Vinay Sajip



From ivlenin at gmail.com  Sat Sep 15 16:33:27 2007
From: ivlenin at gmail.com (I V)
Date: Sat, 15 Sep 2007 20:33:27 GMT
Subject: find and remove "\" character from string
References: <mailman.585.1189873880.2658.python-list@python.org>
Message-ID: <rkXGi.2517$4J3.2227@newssvr22.news.prodigy.net>

On Sat, 15 Sep 2007 19:34:45 +0300, Konstantinos Pachopoulos wrote:
> Hi,
> i have the following string s and the following code, which doesn't
> successfully remove the "\", but sucessfully removes the "\\".

There is no \\ in the string; there's one \ , which gets succesfully 
removed.

>  >>> s="Sad\\asd\asd"

When you write a string in the source code \\ gets changed to \ and \a 
gets changed to "ASCII Bell (BEL)" (that's what the docs say), which is a 
(non-printable) control code that is supposed to make the terminal beep.

>  >>> newS=""
>  >>> for i in s:
> ...     if i!="\\":

Here, your test is true if i is not \

> ...             newS=newS+i
> ...
>  >>> newS
> 'Sadasd\x07sd'

And here, you have a string containing no backslashes, but containing a 
character with ASCII code 7; it turns out that ASCII code 7 is the "ASCII 
Bell", i.e., the character that you added to the string when you wrote 
'\a'.


From deets at nospam.web.de  Mon Sep  3 05:06:41 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 03 Sep 2007 11:06:41 +0200
Subject: TypeError: 'module object is not callable'
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
Message-ID: <5k2151F1p42tU2@mid.uni-berlin.de>

 christophertidy at hotmail.com wrote:

> Hi
> 
> I am new to Python and have recieved this error message when trying to
> instantiate an object from a class from another file within the same
> directory and wondered what I have done wrong.
> 
> I have a Step.py class:
> class Step(object)
>         def __init__(self, sName):
>         "Initialise a new Step instance"
>         self.sName = sName
>         self.depSteps = []
>         self.remDepSteps = []
>         self.isCompleted = 0
> 
> 
> Then I have created a new file within the same directory called
> main.py:
> 
> import Step
> a  = Step("magn")
> 
> The following however generates the error
> Traceback (most recent call last):
>   File "main.py", line 3, in ?
>     a  = Step("magn")
> TypeError: 'module' object is not callable
> 
> If anyone could help point me in the right direction, how to fix this
> problem it would be much appreciated.

Do you by any chance come from a java-background?

Your actual problem is simply solved by this:


import Step

Step.Step("magn")

That's because Step.py is a module, and _not_ the class - there is no
file-class-correspondence as it is in e.g. Java.

Diez




From jeremy+complangpython at jeremysanders.net  Tue Sep 25 07:11:48 2007
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Tue, 25 Sep 2007 12:11:48 +0100
Subject: sorteddict PEP proposal [started off as orderedict]
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
Message-ID: <fdaqdk$lvk$1@gemini.csx.cam.ac.uk>

Mark Summerfield wrote:

> If there is positive feedback I will submit the PEP to the reviewers,
> so if you think it is a good idea please say so. (I'm sure that if you
> _don't_ like it you'll tell me anyway:-)

It would be nice to have the ability to use numerical indexes and the key,
but I don't think they should share the same methods.

A useful use case would be to make a LRU (least recently used) dictionary,
where the keys are time-based (e.g. an incrementing counter). You should be
able to identify the least recently used object for discarding by just
accessing the last item in the dictionary.

By the way, I think a LRU cache dictionary would be a great addition to the
standard library.

Is there any speed advantage from implementing the sorteddict as a red-black
tree or something similar in C?

Jeremy

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


From asma61 at dsl.pipex.com  Wed Sep 19 15:46:00 2007
From: asma61 at dsl.pipex.com (DaveM)
Date: Wed, 19 Sep 2007 20:46:00 +0100
Subject: can Python be useful as functional? (off topic)
References: <1190073045.618869.261290@k79g2000hse.googlegroups.com>
	<mailman.727.1190133380.2658.python-list@python.org>
	<46F02FCF.7080209@pytex.org>
Message-ID: <s1v2f3ph4e6bbtt7c7klvgvli71nr1o7sk@4ax.com>

On Tue, 18 Sep 2007 21:06:39 +0100, Jonathan Fine <jfine at pytex.org> wrote:

>Steve Holden wrote:
>
>> You remind me of the conversation between the philosopher and an 
>> attractive lady whom he was seated next to at dinner. He asked her if 
>> she would sleep with him for a million dollars, to which she readily 
>> agreed. So he followed this by asking her if she'd sleep with him for a 
>> dollar. She replied: "No. Do you take me for a prostitutte?", to which 
>> his riposte was "We have already established that fact, and are now 
>> merely haggling about the price".
>
>I've seen this before, and it is witty.
>
>However, it is perhaps unfair towards the woman.  The man, after all, is 
>someone who has offered a woman money in return for sex.
>
>The whole story reads differently if we replace 'philosopher' by 'man' 
>and 'attractive lady' by 'woman'.

The version I prefer has the woman asking, "What sort of woman do you take
me for?"

DaveM


From kyosohma at gmail.com  Thu Sep 27 10:20:03 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 27 Sep 2007 14:20:03 -0000
Subject: Launching command on windows
In-Reply-To: <1190899078.141370.116190@57g2000hsv.googlegroups.com>
References: <1190899078.141370.116190@57g2000hsv.googlegroups.com>
Message-ID: <1190902803.222738.52050@w3g2000hsg.googlegroups.com>

On Sep 27, 8:17 am, Alexandre Badez <alexandre.ba... at gmail.com> wrote:
> Hy,
>
> I'm working on windows and I try to do something like:
>
> import os
> APP = os.path.abspath("C:\\Program Files\\Notepad++\\notepad++.exe")
> FILE1 = os.path.abspath("D:\\Documents and settings\\test1.py")
> FILE2 = os.path.abspath("D:\\Documents and settings\\test2.py")
> command = '"%(app)s" "%(file1)s" "%(file2)s"' % {
>     'app' : APP,
>     'file1' : FILE1,
>     'file2' : FILE2}
> # === FOR 'DEBUG' ===
> print APP
> print FILE1
> print FILE2
> print command
> print repr(command)
> # === END FOR 'DEBUG' ===
> os.system(command)
>
> This code give in output:
> C:\Program Files\Notepad++\notepad++.exe
> D:\Documents and settings\test1.py
> D:\Documents and settings\test2.py
> "C:\Program Files\Notepad++\notepad++.exe" "D:\Documents and settings
> \test1.py" "D:\Documents and settings\test2.py"
> '"C:\\Program Files\\Notepad++\\notepad++.exe" "D:\\Documents and
> settings\\test1.py" "D:\\Documents and settings\\test2.py"'
>
> 'C:\Program' n'est pas reconnu en tant que commande interne
> ou externe, un programme ex,cutable ou un fichier de commandes.
> # <= My windows is a french one
> # This error message could be translated as:
> # 'c:\Program' is not an internal nor external command, an executable
> program nor a command file
>
> But if I copy the command in the output, an paste it in a console, it
> work very well.
> Does any of you know what I can do ?
>
> PS: I think I'm oblige to add " neer every path for spaces in path,
> but if you know an other way, it could be cool :)



I got it to work using subprocess.Popen

Not sure why it doesn't work with os.system though.

Mike



From dijkstra.arjen at gmail.com  Mon Sep 17 09:31:56 2007
From: dijkstra.arjen at gmail.com (duikboot)
Date: Mon, 17 Sep 2007 13:31:56 -0000
Subject: simple regular expression problem
In-Reply-To: <1190035328.837246.318920@d55g2000hsg.googlegroups.com>
References: <1190034041.796626.66790@n39g2000hsh.googlegroups.com>
	<1190035328.837246.318920@d55g2000hsg.googlegroups.com>
Message-ID: <1190035916.278037.56070@57g2000hsv.googlegroups.com>

Thank you very much, it works. I guess I didn't read it right.

Arjen

On Sep 17, 3:22 pm, Jason Drew <jasondre... at gmail.com> wrote:
> You just need a one-character addition to your regex:
>
> regex = re.compile(r'<organisatie.*?</organisatie>', re.S)
>
> Note, there is now a question mark (?) after the .*
>
> By default, regular expressions are "greedy" and will grab as much
> text as possible when making a match. So your original expression was
> grabbing everything between the first opening tag and the last closing
> tag. The question mark says, don't be greedy, and you get the
> behaviour you need.
>
> This is covered in the documentation for the re module.http://docs.python.org/lib/module-re.html
>
> Jason
>
> On Sep 17, 9:00 am, duikboot <dijkstra.ar... at gmail.com> wrote:
>
> > Hello,
>
> > I am trying to extract a list of strings from a text. I am looking it
> > for hours now, googling didn't help either.
> > Could you please help me?
>
> > >>>s = """ \n<organisatie>\n<Profiel_Id>28996</Profiel_Id>\n</organisatie>\n<organisatie>\n<Profiel_Id>28997</Profiel_Id>\n</organisatie>"""
> > >>> regex = re.compile(r'<organisatie.*</organisatie>', re.S)
> > >>> L = regex.findall(s)
> > >>> print L
>
> > ['organisatie>\n<Profiel_Id>28996</Profiel_Id>\n</organisatie>
> > \n<organisatie>\n<Profiel_Id>28997</Profiel_Id>\n</organisatie']
>
> > I expected:
> > [('organisatie>\n<Profiel_Id>28996</Profiel_Id>\n</organisatie>
> > \n<organisatie>), (<organisatie>\n<Profiel_Id>28997</Profiel_Id>\n</
> > organisatie')]
>
> > I must be missing something very obvious.
>
> > Greetings Arjen



From __peter__ at web.de  Wed Sep  5 12:34:44 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 5 Sep 2007 18:34:44 +0200
Subject: python exec behaves inconsistent with respect to module imports
References: <1188997944.162811.33640@r34g2000hsd.googlegroups.com>
	<fbmde0$io2$03$1@news.t-online.com>
	<1189003511.666050.293060@22g2000hsm.googlegroups.com>
Message-ID: <fbmlr4$vv6$02$1@news.t-online.com>

Am Wed, 05 Sep 2007 14:45:11 +0000 schrieb carl.dhalluin at gmail.com:

> So now get back to my exec code in the previous post.
> The exec applies a mixture of both rules
> 1. The exec looks at its namespace to apply the rule for globals().
> Since I'm not at top-level, variables are not auto-populated in the
> globals(), unless I add the keyword 'global' like you suggested.
> 2. However, the exec applies the other rule for locals(). It does NOT
> copy the locals() from one level to the nested one, although it
> should.
> 
> To me this seems a bug in python exec:
> - exec should look at its context to find out if the exec is called
> top-level or deeper
> - if top-level: auto-populate globals, and do not allow inheritance of
> locals to nested levels
> - if non top-level: dont populate globals, but allow inheritance of
> locals to nested levels.

I like your systematic approach.
 
> What do you think?

Too much work :)

Seriously, the local namespace in a normal python function is not a
dictionary, and the decision on how to access a variable is made at
compile time. One way to achieve consistency would be to always use
dictionaries and have the lookup work its way up through the enclosing
namespaces. Of course that would kill performance...

Peter


From http  Sun Sep  9 23:10:37 2007
From: http (Paul Rubin)
Date: 09 Sep 2007 20:10:37 -0700
Subject: Does shuffle() produce uniform result ?
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
	<mailman.243.1187955760.32294.python-list@python.org>
	<tooru_honda-7C82D1.10432725082007@wvnews01.netvigator.com>
	<tooru_honda-58C552.20355225082007@wvnews01.netvigator.com>
	<tooru_honda-978B9E.11304526082007@wvnews01.netvigator.com>
	<slrnfdnojg.inr.apardon@rcpc42.vub.ac.be>
	<7xejhfbsjo.fsf@ruckus.brouhaha.com>
	<slrnfdpup6.inr.apardon@rcpc42.vub.ac.be>
	<7xabs39bin.fsf@ruckus.brouhaha.com>
	<13drijhfqlvlk96@corp.supernews.com> <fbvmg0$1p3$3@lust.ihug.co.nz>
	<7xhcm4pl5m.fsf@ruckus.brouhaha.com> <fc059c$aa2$6@lust.ihug.co.nz>
	<7xsl5ndau8.fsf@ruckus.brouhaha.com> <fc2brq$i1l$1@lust.ihug.co.nz>
Message-ID: <7xzlzvw6z6.fsf@ruckus.brouhaha.com>

Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> writes:
> According to this <http://en.wikipedia.org/wiki/SHA-1>, the family of
> algorithms collectively described as "SHA-2" is by no means a definitive
> successor to SHA-1.

See <http://csrc.nist.gov/hash_standards_comments.pdf>:

    However, due to advances in technology, NIST plans to phase out of
    SHA-1 in favor of the larger and stronger hash functions (SHA-224,
    SHA-256, SHA-384 and SHA-512) by 2010. SHA-1 and the larger hash
    functions are specified in FIPS 180-2. For planning purposes by
    Federal agencies and others, note also that the use of other
    cryptographic algorithms of similar strength to SHA-1 will also be
    phased out in 2010.  SHA-1 and the stronger hash functions in FIPS
    180-2 are all NIST approved. 

This may also be of interest:

   http://www.csrc.nist.gov/pki/HashWorkshop/index.html


From ruoyu0088 at gmail.com  Wed Sep 26 00:22:37 2007
From: ruoyu0088 at gmail.com (HYRY)
Date: Tue, 25 Sep 2007 21:22:37 -0700
Subject: the address of list.append and list.append.__doc__
In-Reply-To: <mailman.1077.1190776788.2658.python-list@python.org>
References: <1190775258.351819.24930@22g2000hsm.googlegroups.com>
	<mailman.1077.1190776788.2658.python-list@python.org>
Message-ID: <1190780557.879816.13800@d55g2000hsg.googlegroups.com>

> No. a.append is a "bound method" - a method that already has an
> associated instance, that will be provided as the first argument to the
> method call. Bound methods are created "on the fly".
>

Does this means there is no method to get the original methods from
the Bound methods created "on the fly"?

I installed python 2.4.4 and tried id(list.append.__doc__) again, here
is the result, only id(list.append.__doc__) changes, this is strange,
and only happened in the command line. Because I am doing something
program that use this id in the command line. Can someone help me try
this on your PC, I want to know which is the problem: this version of
python, or my PC.

Python 2.4.4 (#71, Oct 18 2006, 08:34:43) [MSC v.1310 32 bit (Intel)]
on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> id(list.__doc__)
11674984
>>> id(list.__doc__)
11674984
>>> id(list.__doc__)
11674984
>>> id(list.append.__doc__)
11747168
>>> id(list.append.__doc__)
11824352
>>> id(list.append.__doc__)
11747168
>>> id(list.append.__doc__)
11824352
>>> id(list.append.__doc__)
11747168
>>> id(list.append.__doc__)
11824352
>>> id(list.count.__doc__)
11863968
>>> id(list.count.__doc__)
11863968
>>> id(list.count.__doc__)
11863968
>>> id(list.count.__doc__)
11863968



From david at asdf.asdf  Tue Sep 11 01:52:05 2007
From: david at asdf.asdf (bambam)
Date: Tue, 11 Sep 2007 15:52:05 +1000
Subject: function to do dynamic import?
Message-ID: <13ecb84p1ghrd64@corp.supernews.com>

import works in the main section of the module, but does
not work as I hoped when run inside a function.

That is, the modules import correctly, but are not visible to
the enclosing (global) scope.

Questions:
(1) Where can I read an explanation of this?
(2) Is there a work around?

BTW, sys.modules("filename") shows that the module is
loaded, I just don't know how to use it when loaded that
way.  Also, if I import again at the global scope, the module
name becomes available.

Steve.

---
>>> def gim():
... exec "import gamel"
...
>>> gim()
>>> sys.modules["gamel"]
<module 'gamel' from 'c:\gamel.pyc'>
>>>gamel
NameError: name 'gamel' is not defined
>>>exec "import gamel"
>>>gamel
<module 'gamel' from 'c:\gamel.pyc'> 




From jjl at pobox.com  Thu Sep 20 14:55:47 2007
From: jjl at pobox.com (John J. Lee)
Date: Thu, 20 Sep 2007 18:55:47 GMT
Subject: frange() question
References: <fctrc1$doh$1@news.nems.noaa.gov>
Message-ID: <87tzppjhe4.fsf@pobox.com>

George Trojan <george.trojan at noaa.gov> writes:

> A while ago I found somewhere the following implementation of frange():
>
> def frange(limit1, limit2 = None, increment = 1.):
>     """
>     Range function that accepts floats (and integers).
>     Usage:
>     frange(-2, 2, 0.1)
>     frange(10)
>     frange(10, increment = 0.5)
>     The returned value is an iterator.  Use list(frange) for a list.
>     """
>     if limit2 is None:
>         limit2, limit1 = limit1, 0.
>     else:
>         limit1 = float(limit1)
>     count = int(math.ceil(limit2 - limit1)/increment)
>     return (limit1 + n*increment for n in range(count))
>
> I am puzzled by the parentheses in the last line. Somehow they make
> frange to be a generator:
>>> print type(frange(1.0, increment=0.5))
> <type 'generator'>

Functions are never generators, senso stricto.  There are "generator
functions", which *return* (or yield) generators when you call them.
It's true sometimes people refer to generator functions as simply
"generators", but in examples like the above, it's useful to remember
that they are two different things.

In this case, frange isn't a generator function, because it doesn't
yield.  Instead, it returns the result of evaluating a generator
expression (a generator).  The generatator expression plays the same
role as a generator function -- calling a generator function gives you
a generator object; evaluating a generator expression gives you a
generator object.  There's nothing to stop you returning that
generator object, which makes this function behave just like a regular
generator function.


John


From steve at holdenweb.com  Mon Sep 17 19:48:16 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 17 Sep 2007 19:48:16 -0400
Subject: "once" assigment in Python
In-Reply-To: <1190070620.926481.56620@k79g2000hse.googlegroups.com>
References: <1189750616.597409.85380@w3g2000hsg.googlegroups.com>	<1uSdnaFGwMuICHPbnZ2dnUVZ_tijnZ2d@comcast.com>
	<1190070620.926481.56620@k79g2000hse.googlegroups.com>
Message-ID: <fcn3nv$q3p$1@sea.gmane.org>

Lorenzo Di Gregorio wrote:
> On 17 Sep., 16:54, Larry Bates <larry.ba... at websafe.com> wrote:
>> IMHO variables like what you describe are really data not program variables.
>> You might consider putting variables like these in a dictionary and then check
>> to see if the keys exist before assignment:
>>
>> var_dict={}
>>
>> #
>> # See if 'varname' initialized, if not it needs to be
>> #
>> if 'varname' not in var_dict:
>>       var_dict[varname]=somevalue
> 
> This is a good point!
> 
> I could write something like:
> 
> instantiate('component',function)
> 
> and have instantiate() to conditionally do:
> 
> instance['component']=Module(function)
> 
> Of course this means using:
> 
> instance['component'].method()
> 
> instead of just:
> 
> component.method()
> 
Well, you could do that. Or you could define a class, with a __getattr__ 
that returns the required default value in the case where no setting had 
been made.

Then you can assign components (with their own hierarchies) to the 
attributes of your top-level design ...

> A more annoying difficulty is with the fact that, while the scope of
> ordinary variables is limited (function, package), the scope of
> 'component' would be global (the whole instance[]): having global
> names could be pretty annoying in modeling a hierarchy.  Anyway, some
> scoping mechanism could be implemented over the global dictionary and
> this could be a good price to pay to avoid other tricks.
> Further suggestions?
> 
It's not actually that hard to create objects that allow you to access 
their attributes using *either* attribute or indexing notation.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From pavlovevidence at gmail.com  Fri Sep 28 19:15:22 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 28 Sep 2007 16:15:22 -0700
Subject: getopt with negative numbers?
In-Reply-To: <87odfm3021.fsf@benfinney.id.au>
References: <1190913250.198794.269530@k79g2000hse.googlegroups.com>
	<fdgpic$ssu$00$1@news.t-online.com>
	<1190915197.390247.313590@57g2000hsv.googlegroups.com>
	<fdgri5$ssu$00$2@news.t-online.com>
	<mailman.1182.1190917341.2658.python-list@python.org>
	<1190930134.780005.68510@22g2000hsm.googlegroups.com>
	<mailman.1196.1190937544.2658.python-list@python.org>
	<1190944143.521085.66910@g4g2000hsf.googlegroups.com>
	<871wcj4ib9.fsf@benfinney.id.au>
	<1190999036.588941.165610@g4g2000hsf.googlegroups.com>
	<GdednaFCqLj6oGDbnZ2dnUVZ_g6dnZ2d@comcast.com>
	<87odfm3021.fsf@benfinney.id.au>
Message-ID: <1191021322.905791.21300@r29g2000hsg.googlegroups.com>

On Sep 28, 6:19 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> Steven Bethard <steven.beth... at gmail.com> writes:
> > A user shouldn't have to go out of their way to specify regular
> > numbers on the command line, regardless of whether they're positive
> > or negative.
>
> A user shouldn't have to go out of their way to know whether what they
> type on a command line will be treated as an option or an argument.

I guess typing

./program --help

is out of the question.



Carl Banks



From heikki at osafoundation.org  Tue Sep 25 02:44:52 2007
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Mon, 24 Sep 2007 23:44:52 -0700
Subject: M2Crypto 0.18 - new version, same old build bugs - more details
In-Reply-To: <46F82296.5010701@animats.com>
References: <eiAIi.10067$924.3670@newssvr23.news.prodigy.net>
	<xoudna66YI1O5m7bnZ2dnUVZ_umdnZ2d@comcast.com>
	<46F82296.5010701@animats.com>
Message-ID: <Ur-dnTfIZcj5M2XbnZ2dnUVZ_hSdnZ2d@comcast.com>

John Nagle wrote:
> But notice that the -D entry didn't appear on the SWIG command line.
> Neither did the "-includeall".  The "swig_opts" values around line
> 129 aren't actually being used.  I think that's left over from the code
> intended
> to allow builds with Python 2.3 and earlier.  The "self.swig_opts" up at
> line 53 of "setup.py" seems to be controlling.  The patch was to
> the obsolete code.

Aha! Good find. I reopened
https://bugzilla.osafoundation.org/show_bug.cgi?id=9404 and attached a
patch that should address this for real this time. At least -includeall
appears in my Ubuntu Dapper Drake environment. Could you give it a go
and let me know how it works?

-- 
  Heikki Toivonen


From rrr at ronadam.com  Sat Sep 22 03:02:57 2007
From: rrr at ronadam.com (Ron Adam)
Date: Sat, 22 Sep 2007 02:02:57 -0500
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <13f8unjjeqs5p97@corp.supernews.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>	<mailman.900.1190414696.2658.python-list@python.org>	<1190415741.380795.259050@y42g2000hsy.googlegroups.com>
	<13f8unjjeqs5p97@corp.supernews.com>
Message-ID: <46F4BE21.2050800@ronadam.com>



Scott David Daniels wrote:
> Cristian wrote:
>> On Sep 21, 3:44 pm, Ron Adam <r... at ronadam.com> wrote:
>>
>>> I think key may be to discuss names and name binding with your friend.
> 
> Here's an idea:
> 
> import math
> 
> def sin_integral(start, finish, dx):
>      total = 0.0
>      y0 = math.sin(start)
>      for n in range(1, 1 + int((finish - start) / float(dx))):
>          y1 = math.sin(start + n * dx)
>          total += (y0 + y1)
>          y0 = y1
>      return total / 2. * dx
> 
> 
> def cos_integral(start, finish, dx):
>      total = 0.0
>      y0 = math.sin(start)
>      for n in range(1, 1 + int((finish - start) / float(dx))):
>          y1 = math.cos(start + n * dx)
>          total += (y0 + y1)
>          y0 = y1
>      return total / 2. * dx
> 
> generalize and separate the integration technique from the
> function it integrates.


How about this?

It's based on the apple basic program example in How to Enjoy Calculus.


    Ron




import math

def integrate(fn, x1, x2, n=100):
     # Calculate area of fn using Simpson's rule.
     width = float(x2 - x1) / n
     area = fn(x1)
     if n % 2 != 0:     # make sure its even
         n += 1
     for n in range(1, n):
         x = x1 + n * width
         if n % 2 == 0:
             area += 2.0 * fn(x)
         else:
             area += 4.0 * fn(x)
     area += fn(x2)
     return area * (width / 3.0)


def fn(x):
     return x**2

print "Area of fn:", integrate(fn, 0, 2)

print "Area of cos fn:", integrate(math.cos, 1, 2)

print "Area of sin fn:", integrate(math.sin, 1, 2)




Area of fn: 2.66666666667
Area of cos fn: 0.0678264420216
Area of sin fn: 0.956449142468





From f.braennstroem at gmx.de  Thu Sep 13 18:09:11 2007
From: f.braennstroem at gmx.de (Fabian Braennstroem)
Date: Thu, 13 Sep 2007 22:09:11 +0000
Subject: extract text from log file using re
In-Reply-To: <fcc1so$pcv$1@sea.gmane.org>
References: <fcc1so$pcv$1@sea.gmane.org>
Message-ID: <fcc5d3$620$1@sea.gmane.org>

me again... I should describe it better:
the result should be an array with just:

498 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04 8.3956e-04
3.8560e-03 4.8384e-02 11:40:01  499
499 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04  8.3956e-04
3.8560e-03 4.8384e-02 11:40:01  499
500 1.0049e-03 2.4630e-04 9.8395e-05 1.4865e-04 8.3913e-04
3.8545e-03 1.3315e-01 11:14:10  500
501 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04 8.3956e-04
3.8560e-03 4.8384e-02 11:40:01  499

as field values.

Fabian Braennstroem schrieb am 09/13/2007 09:09 PM:
> Hi,
> 
> I would like to delete a region on a log file which has this
> kind of structure:
> 
> 
> #------flutest------------------------------------------------------------
>    498 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04
> 8.3956e-04 3.8560e-03 4.8384e-02 11:40:01  499
>    499 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04
> 8.3956e-04 3.8560e-03 4.8384e-02 11:40:01  499
> reversed flow in 1 faces on pressure-outlet 35.
> 
> Writing
> "/home/gcae504/SCR1/Solververgleich/Klimakruemmer_AK/CAD/Daimler/fluent-0500.cas"...
>  5429199 mixed cells, zone 29, binary.
> 11187656 mixed interior faces, zone 30, binary.
>    20004 triangular wall faces, zone 31, binary.
>     1104 mixed velocity-inlet faces, zone 32, binary.
>   133638 triangular wall faces, zone 33, binary.
>    14529 triangular wall faces, zone 34, binary.
>     1350 mixed pressure-outlet faces, zone 35, binary.
>    11714 mixed wall faces, zone 36, binary.
>  1232141 nodes, binary.
>  1232141 node flags, binary.
> Done.
> 
> 
> Writing
> "/home/gcae504/SCR1/Solververgleich/Klimakruemmer_AK/CAD/Daimler/fluent-0500.dat"...
> Done.
> 
>    500 1.0049e-03 2.4630e-04 9.8395e-05 1.4865e-04
> 8.3913e-04 3.8545e-03 1.3315e-01 11:14:10  500
> 
>  reversed flow in 2 faces on pressure-outlet 35.
>    501 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04
> 8.3956e-04 3.8560e-03 4.8384e-02 11:40:01  499
> 
> #------------------------------------------------------------------
> 
> I have a small script, which removes lines starting with
> '(re)versed', '(i)teration' and '(t)urbulent'  and put the
> rest into an array:
> 
> # -- plot residuals ----------------------------------------
>       import re
> filename="flutest"
> reversed_flow=re.compile('^\ re')
> turbulent_viscosity_ratio=re.compile('^\ tu')
> iteration=re.compile('^\ \ i')
> 
> begin_of_res=re.compile('>\ \ \ i')
> end_of_res=re.compile('^\ ad')
> 
> begin_of_writing=re.compile('^\Writing')
> end_of_writing=re.compile('^\Done')
> 
> end_number=0
> begin_number=0
> 
> 
> n = 0
> for line in open(filename).readlines():
>     n = n + 1
>     if begin_of_res.match(line):
>         begin_number=n+1
>         print "Line Number (begin): " + str(n)
> 
>     if end_of_res.match(line):
>         end_number=n
>         print "Line Number (end): " + str(n)
> 
>     if begin_of_writing.match(line):
>         begin_w=n+1
>         print "BeginWriting: " + str(n)
>         print "HALLO"
> 
>     if end_of_writing.match(line):
>         end_w=n+1
>         print "EndWriting: " +str(n)
> 
> if n > end_number:
>     end_number=n
>     print "Line Number (end): " + str(end_number)
> 
> 
> 
> 
> 
> n = 0
> array = []
> array_dummy = []
> array_mapped = []
> 
> mapped = []
> mappe = []
> 
> n = 0
> for line in open(filename).readlines():
>     n = n + 1
>     if (begin_number <= n) and (end_number > n):
> #        if (begin_w <= n) and (end_w > n):
>             if not reversed_flow.match(line) and not
> iteration.match(line) and not
> turbulent_viscosity_ratio.match(line):
>                 m=(line.strip().split())
>                 print m
>                 if len(m) > 0:
> #                    print len(m)
>                     laenge_liste=len(m)
> #                    print len(m)
>                     mappe.append(m)
> 
> 
> #--end plot
> residuals-------------------------------------------------
> 
> This works fine ; except for the region with the writing
> information:
> 
> #-----writing information
> -----------------------------------------
> Writing "/home/fb/fluent-0500.cas"...
>  5429199 mixed cells, zone 29, binary.
> 11187656 mixed interior faces, zone 30, binary.
>    20004 triangular wall faces, zone 31, binary.
>     1104 mixed velocity-inlet faces, zone 32, binary.
>   133638 triangular wall faces, zone 33, binary.
>    14529 triangular wall faces, zone 34, binary.
>     1350 mixed pressure-outlet faces, zone 35, binary.
>    11714 mixed wall faces, zone 36, binary.
>  1232141 nodes, binary.
>  1232141 node flags, binary.
> Done.
> # -------end writing information -------------------------------
> 
> Does anyone know, how I can this 'writing' stuff too? The
> matchingIt occurs a lot :-(
> 
> Regards!
> Fabian
> 



From gherron at islandtraining.com  Fri Sep 28 03:06:55 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Fri, 28 Sep 2007 00:06:55 -0700
Subject: marshal bug?
In-Reply-To: <1190961020.258850.215130@g4g2000hsf.googlegroups.com>
References: <1190961020.258850.215130@g4g2000hsf.googlegroups.com>
Message-ID: <46FCA80F.8050307@islandtraining.com>



Anurag wrote:
> I have been chasing a problem in my code since hours and it bolis down
> to this
> import marshal
> marshal.dumps(str(123)) != marshal.dumps(str("123"))
>
> Can someone please tell me why?
> when
> str(123) == str("123")
>
> or are they different?
>
> it also means that
> if s = str(123)
> marshal.dumps(s) != marshal.dumps(marshal.loads(marshal.dumps(s)))
>
> rgds
> Anurag
>
>   

Any string in Python can be "interned" or not, the difference being
how/where the value is stored internally.  The marshal module includes
such information in its output.  What you are doing is probably
considered a misuse of the marshal module.  I'd suggest using the pickle
(or cPickle) modules instead.

Here's the relevant part of the manual for marshal:

version:
    Indicates the format that the module uses. Version 0 is the
    historical format, version 1 (added in Python 2.4) shares interned
    strings and version 2 (added in Python 2.5) uses a binary format for
    floating point numbers. The current version is 2









    Gary Herron.




From sjmachin at lexicon.net  Sat Sep 15 06:33:52 2007
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 15 Sep 2007 03:33:52 -0700
Subject: trim start and trailing space chars from string
In-Reply-To: <mailman.571.1189848032.2658.python-list@python.org>
References: <mailman.571.1189848032.2658.python-list@python.org>
Message-ID: <1189852432.173978.71370@19g2000hsx.googlegroups.com>

On Sep 15, 7:24 pm, Konstantinos Pachopoulos <kostaspa... at yahoo.gr>
wrote:
> Hi,
> is there something corresponding to the java String.trim() method, ie
> trim start and trailing space/tab chars from string?
> say convert " asdf   "  to "asdf"?

http://docs.python.org/lib/string-methods.html




From tec at knology.net  Tue Sep 11 08:09:58 2007
From: tec at knology.net (Tim)
Date: Tue, 11 Sep 2007 05:09:58 -0700
Subject: memcpy
In-Reply-To: <5klnsbF3vfqqU10@mid.uni-berlin.de>
References: <1189449530.171049.323230@22g2000hsm.googlegroups.com>
	<5klnsbF3vfqqU10@mid.uni-berlin.de>
Message-ID: <1189512598.410810.224340@y42g2000hsy.googlegroups.com>

On Sep 10, 3:31 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Mon, 10 Sep 2007 11:38:50 -0700, Tim wrote:
> > How do I memcpy from a pointer to an array of floats in python?
>
> > I get errors: NameError: global name 'row' is not defined
>
> Well than the (global) name `row` is not defined.  Quite clear message,
> isn't it?  ;-)
>
> > I want to be able to get the row[i] array element. In C I would
> > normally place the address of row as the first argument.
>
> > cdll.msvcrt.memcpy( row, pData, 256 )
>
> > If I define row as the following I also get the following error:
>
> > row = ones( TOTAL_PARAMETER_ENTRIES, dtype=float )
>
> > ArgumentError: argument 1: <type 'exceptions.TypeError'>: Don't know
> > how to convert parameter 1
>
> You don't give enough information so we have to guess.  For example I
> guess the `ones()` function comes from one of the packages `numeric`,
> `numarray` or `numpy`!?
>
> This function returns a Python object.  You can't use arbitrary Python
> objects with `ctypes`.  `memcpy` expects a pointer not an object.
>
> Ciao,
>         Marc 'BlackJack' Rintsch

Can I initialize something in Python that I can get access to it's
pointer?
How about:

self.data =
TOTAL_OUTPUT_PARMETERS*[TOTAL_PARAMETER_ENTRIES*[c_float()]

or

self.data = TOTAL_OUTPUT_PARMETERS*[c_char_p("temp")]

or

self.data = [TOTAL_OUTPUT_PARMETERS*1.0]*TOTAL_PARAMETER_ENTRIES

I need to be able to copy the contents of a pointer to shared memory
into an array of floats so I can index into that array and see my
data. I have a pointer to shared meory but I don't know how to access
it.

Here is what I would like to write:

shared_memory_pointer = windll.kernel32.MapViewOfFile(hMapObject,
FILE_MAP_ALL_ACCESS,
            0, 0, TABLE_SHMEMSIZE)

memcpy( self.data, shared_memory_pointer, my_size )

Thanks



From aahz at pythoncraft.com  Mon Sep 17 10:53:04 2007
From: aahz at pythoncraft.com (Aahz)
Date: 17 Sep 2007 07:53:04 -0700
Subject: Un(der)documented bits of cgi.py
References: <mLadnSK4GYnlXnHbnZ2dnUVZ_q2hnZ2d@speakeasy.net>
Message-ID: <fcm4cg$e90$1@panix3.panix.com>

In article <mLadnSK4GYnlXnHbnZ2dnUVZ_q2hnZ2d at speakeasy.net>,
Bob Kline  <bkline at rksystems.com> wrote:
>
>I'm trying to detect and intelligently deal with problems created when
>a user of a Python CGI page uploads a file and then gets impatient
>and clicks on some other button or the browser's cancel button (or
>even closes the page).  If the file is large enough, and the user is
>impatient enough, this can result in the FieldStorage.file object
>getting some, but not all of the bytes from the user's file, with no
>documented means of detecting that this has happened.  Poking around
>in the code for cgi.py in the standard library, it appears that there
>is an undocumented 'done' attribute which might be useful here (it
>seems as if it might get set to -1 when this condition is encountered),
>but of course one is reluctant to leave behind software which relies
>on undocumented behavior of packages, since those bits have a way
>of disappearing in the middle of the night, suddenly breaking one's
>software.  Can anyone think of a good reason why it would not be
>desirable to expose a publicly documented means of detecting the
>condition described above?

What I suggest doing is submitting a doc patch to 
http://bugs.python.org/
explaining the ``done`` attribute with a note that you're not sure
whether the attribute is intended to be undocumented.  Alternatively, you
might look in the svn logs to find out who added the ``done`` attribute
and if they're still active in the Python community, ask them directly.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

The best way to get information on Usenet is not to ask a question, but
to post the wrong information.


From s.rappard at gmail.com  Tue Sep 11 14:35:00 2007
From: s.rappard at gmail.com (Sjoerd)
Date: Tue, 11 Sep 2007 11:35:00 -0700
Subject: mod_python and pysvn
In-Reply-To: <5ko2anF4iuuiU1@mid.individual.net>
References: <1189525797.361829.69380@g4g2000hsf.googlegroups.com>
	<mailman.392.1189526179.2658.python-list@python.org>
	<5ko2anF4iuuiU1@mid.individual.net>
Message-ID: <1189535700.882545.253160@k79g2000hse.googlegroups.com>

On Sep 11, 7:41 pm, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:
> Tim Golden wrote:
> > Sjoerd wrote:
> >> ClientError: Unable to open an ra_local session to URL
> >> Unable to open repository 'file:///P:/tools/builds/repository'
>
> >> does anyone know how I can fix this?
>
> > Usually means that the process which Apache is running under
> > (may well be LocalSystem) doesn't know about or doesn't have
> > access to p:/tools etc.
>
> Isn't this an SVN client error? Seems to me that the repository URL
> is invalid.
>
> Tim, try accessing the repository using svn list from the command
> line.
>
> Regards,
>
> Bj?rn
>
> --
> BOFH excuse #350:
>
> paradigm shift...without a clutch

Thank you both for your replies!
I suspect that if I import the script that the script becomes local
for apache
Who tries to form the path.
The actual command:

client = Client()
repLog = client.log("\\P:\\tools\builds\publish\\")
I used an UNC path. The forming of the repository path must be inside
the pysvn
library.

When I run the script via the command console it returns the right
values.
So I think what Tim replies is quite acurate!
I'm going to try that tomorrow!

Cheers!
Sjoerd



From martin at v.loewis.de  Mon Sep 10 17:34:05 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 10 Sep 2007 23:34:05 +0200
Subject: Why zlib not included in Python tarball?
In-Reply-To: <mailman.337.1189455641.2658.python-list@python.org>
References: <mailman.337.1189455641.2658.python-list@python.org>
Message-ID: <46E5B84D.5020803@v.loewis.de>

>  I need to install my own Python. I compiled Python 2.4.4 from sources. zlib 
> did not compile - it's not in the lib-dynload directory.
> 
> I did not have this problem with any of my earlier Python compiles. I 
> routinely compile Python from source.
> 
> What is the correct procedure for installing zlib from source into Python?

Depends on the operating system and the Python version. On Unix, you
need to install zlib first; if you install a precompiled zlib package,
make sure you install the header files as well.

Regards,
Martin


From massonmousson at gmail.com  Fri Sep 14 01:11:10 2007
From: massonmousson at gmail.com (Thierry Masson)
Date: Thu, 13 Sep 2007 22:11:10 -0700
Subject: Extending Python with C API
In-Reply-To: <c69d11d00709131949q487df136kfd368f8dfe063fa5@mail.gmail.com>
References: <c69d11d00709131805j1c39dc1w47ec39e914a72191@mail.gmail.com>
	<1189733193.3248.7.camel@localhost.localdomain>
	<c69d11d00709131949q487df136kfd368f8dfe063fa5@mail.gmail.com>
Message-ID: <c69d11d00709132211y51077e79k3431742e1eaf0f77@mail.gmail.com>

On 9/13/07, Carsten Haese wrote:
>Your module C code uses an unknown function by the name of PyBuildValue.
>The actual name of the function you mean is Py_BuildValue.

Thank you so much, Carsten. I can't believe I missed that underscore! I'm
posting the working code below in case it ever turns out to be useful for
someone else who is new to the Python C API. (I also added the init
function, which I forgot to include in my original post). I've verified that
this code works on Red Hat Enterprise Linux ES release 3 (Taroon Update 8).

Code for writing a C API Python Extension (cobbled together from so many
online and printed sources that it's hard to know where to start with the
acknowledgements):

File gtestmodule.c:
==============
#include "Python.h"

/* First, a couple of C functions that do the real work */
/* In this test example, "real work" is perhaps exaggerating a little */
int GetInt(int iVal)
{
    // Double the supplied value and pass it back
    return iVal * 2;
}

char* GetString(void)
{
    return "This is the message";
}

/* Now a couple of corresponding wrapper functions so that Python can get
access to them */

/* Python requires this return data type and these arguments */
PyObject* gtestmodule_GetInt(PyObject* pSelf, PyObject* pArgs)
{
    int x = 0, iRet = 0;

    /* Validate and assign the single integer argument (that's what GetInt()
expects) */
    /* The "i" means just one integer */
    /* Two integers would be "ii"; an integer, a string, a float and a long
would be "isdl" */
    if (!PyArg_ParseTuple(pArgs, "i", &x))
        return NULL;

    iRet = GetInt(x);
    return Py_BuildValue("i", iRet);
}

PyObject* gtestmodule_GetString(PyObject* pSelf, PyObject* pArgs)
{
    char* szMsg = GetString();
    return Py_BuildValue("s", szMsg);
}

/* Method table for mapping function names to wrapper functions */
static PyMethodDef gtestmoduleMethods[] =
{
    {"GetInt", gtestmodule_GetInt, METH_VARARGS, "Description goes here"},
    {"GetString", gtestmodule_GetString, METH_VARARGS, "Description goes
here"},
    {NULL, NULL}
};

/* Module initialization function */
initgtestmodule(void)
{
    Py_InitModule("gtestmodule", gtestmoduleMethods);
}

File setup.py:
=========
# To build and install the module, use: python setup.py install
# Running this will generate a library file (gtestmodule.so on Linux)
#
from distutils.core import setup, Extension
setup(name = "gtestmodule",
      version = "1.0",
      maintainer = "your name here",
      maintainer_email = "you at yourdomain.com",
      description = "test module",
      ext_modules = [Extension("gtestmodule",[" gtestmodule.c"])],
)

File test.py:
========
# Simple test routine to run after building the library file
import gtestmodule
print gtestmodule.GetInt(36);
print gtestmodule.GetString();
-------------- next part --------------
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From wolf_tracks at invalid.com  Thu Sep 20 15:56:09 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Thu, 20 Sep 2007 19:56:09 GMT
Subject: An Editor that Skips to the End of a Def
In-Reply-To: <87hclpjm3a.fsf@rudin.co.uk>
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk>
Message-ID: <tfAIi.51111$Um6.44314@newssvr12.news.prodigy.net>

Maybe I'll take a look. When I left the world of Unix/Linux 10 years ago, 
emacs went with it, as did vi.

Paul Rudin wrote:
> "W. Watson" <wolf_tracks at invalid.com> writes:
> 
>> Thanks, but no thanks. The learning curve is way too steep.
> 
> Up to you but, these days emacs comes with all sorts of
> pointing-clicky-menu-y type things - you don't really have to learn
> anything to get started.
> 
> (It even gives useful advice on top-posting if you use it as a news
> client :/)

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From schilling.klaus at web.de  Sun Sep 30 02:43:39 2007
From: schilling.klaus at web.de (Klaus Schilling)
Date: Sun, 30 Sep 2007 08:43:39 +0200
Subject: The Modernization of Emacs: terminology buffer and keybinding
References: <1182093200.598418.218620@e9g2000prf.googlegroups.com>
	<1182272495.990807.99110@a26g2000pre.googlegroups.com>
	<87tzt3ihev.fsf@kobe.laptop> <m31wg6lre9.fsf@borud.not>
	<1182370216.961241.6960@n60g2000hse.googlegroups.com>
	<85zm2ufjpb.fsf@lola.goethe.zz>
	<1182372592.803332.288260@u2g2000hsc.googlegroups.com>
	<m3myyt47nq.fsf@latakia.dyndns.org>
	<1182549094.366282.286740@m37g2000prh.googlegroups.com>
	<87bqf7fwmg.fsf@telesippa.clsnet.nl>
	<1182553682.197778.138500@g37g2000prf.googlegroups.com>
	<873b0fhokz.fsf@kobe.laptop> <13frd6vtarbee75@corp.supernews.com>
	<pmnLi.1684$hP.1048@newsfe12.lga>
Message-ID: <87lkao8xgk.fsf@web.de>

Ken Tilton <kennytilton at optonline.net> writes:
>
> Sure, but where does the infection thing come in? Suppose RMS
> publishes a new library call add-42, whose api is add-42, inputs n,
> outputs n+42, source left as an exercise, and Kenny decides he can use
> it, it is great. Now if Kenny uses it in his commercial software,

commercial software can be free as well, such as the GNU Ada compiler.

> add-42 does not somehow become less free to ride 'neath the starry
> skies above, don't fence me in. But RMS wants Kenny's hide. Nothing
> Kenny wrote derived from add-42, but RMS wants it all.

that's because it's immoral not to give it all


> Kenny happened
> to solve the traveling salesman problem and protein-folding and passed
> the fricking Turing test by using add-42 wherever he needed 42 added
> to a number, and  RMS wants credit and ownership and control of it
> all. He and his license  shall now dictate access and use of all that
> code. The handcuffs are on, and they are inscribed "free".

of course they are free
>
> No wonder the GPL has gone nowhere. Freely. RMS reasonably wanted that
> add-42 not get co-opted, but that in no way necessitated the land grab
> that is GPL. The GPL is a gratuitous reach only fancifully justified
> by wanting to ensure that open source remain open.

which is necessary in a moral culture.
Only an immoral culture may accept non-disclosure

> So this has nothing
> to do with freedom in /any/ sense of the word, it has to do with a
> political agenda opposed to the idea of private property.
>

private property is unethical

Klaus Schilling


From george.sakkis at gmail.com  Fri Sep 21 02:46:05 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 21 Sep 2007 06:46:05 -0000
Subject: I could use some help making this Python code run faster using
	only Python code.
In-Reply-To: <1190330015.131971.265680@y42g2000hsy.googlegroups.com>
References: <1190325588.608625.259800@q3g2000prf.googlegroups.com>
	<1190328413.226577.206740@k79g2000hse.googlegroups.com>
	<1190330015.131971.265680@y42g2000hsy.googlegroups.com>
Message-ID: <1190357165.381313.197910@19g2000hsx.googlegroups.com>

On Sep 20, 7:13 pm, "mensana... at aol.com" <mensana... at aol.com> wrote:
> On Sep 20, 5:46 pm, Paul Hankin <paul.han... at gmail.com> wrote:
>
>
>
> > On Sep 20, 10:59 pm, Python Maniac <raych... at hotmail.com> wrote:
>
> > > I am new to Python however I would like some feedback from those who
> > > know more about Python than I do at this time.
>
> > > def scrambleLine(line):
> > >     s = ''
> > >     for c in line:
> > >         s += chr(ord(c) | 0x80)
> > >     return s
>
> > > def descrambleLine(line):
> > >     s = ''
> > >     for c in line:
> > >         s += chr(ord(c) & 0x7f)
> > >     return s
> > > ...
>
> > Well, scrambleLine will remove line-endings, so when you're
> > descrambling
> > you'll be processing the entire file at once. This is particularly bad
> > because of the way your functions work, adding a character at a time
> > to
> > s.
>
> > Probably your easiest bet is to iterate over the file using read(N)
> > for some small N rather than doing a line at a time. Something like:
>
> > process_bytes = (descrambleLine, scrambleLine)[action]
> > while 1:
> >     r = f.read(16)
> >     if not r: break
> >     ff.write(process_bytes(r))
>
> > In general, rather than building strings by starting with an empty
> > string and repeatedly adding to it, you should use ''.join(...)
>
> > For instance...
> > def descrambleLine(line):
> >   return ''.join(chr(ord(c) & 0x7f) for c in line)
>
> > def scrambleLine(line):
> >   return ''.join(chr(ord(c) | 0x80) for c in line)
>
> > It's less code, more readable and faster!
>
> I would have thought that also from what I've heard here.
>
> def scrambleLine(line):
>     s = ''
>     for c in line:
>         s += chr(ord(c) | 0x80)
>     return s
>
> def scrambleLine1(line):
>     return ''.join([chr(ord(c) | 0x80) for c in line])
>
> if __name__=='__main__':
>     from timeit import Timer
>     t = Timer("scrambleLine('abcdefghijklmnopqrstuvwxyz')", "from
> __main__ import scrambleLine")
>     print t.timeit()
>
> ##  scrambleLine
> ##  13.0013366039
> ##  12.9461998318
> ##
> ##  scrambleLine1
> ##  14.4514098748
> ##  14.3594400695
>
> How come it's not? Then I noticed you don't have brackets in
> the join statement. So I tried without them and got
>
> ##  17.6010847978
> ##  17.6111472418
>
> Am I doing something wrong?


It has to do with the input string length; try multiplying it by 10 or
100. Below is a more complete benchmark; for largish strings, the imap
version is the fastest among those using the original algorithm. Of
course using a lookup table as Diez showed is even faster. FWIW, here
are some timings (Python 2.5, WinXP):

scramble:       1.818
scramble_listcomp:      1.492
scramble_gencomp:       1.535
scramble_map:   1.377
scramble_imap:  1.332
scramble_dict:  0.817
scramble_dict_map:      0.419
scramble_dict_imap:     0.410

And the benchmark script:

from itertools import imap

def scramble(line):
    s = ''
    for c in line:
        s += chr(ord(c) | 0x80)
    return s

def scramble_listcomp(line):
    return ''.join([chr(ord(c) | 0x80) for c in line])

def scramble_gencomp(line):
    return ''.join(chr(ord(c) | 0x80) for c in line)

def scramble_map(line):
    return ''.join(map(chr, map(0x80.__or__, map(ord,line))))

def scramble_imap(line):
    return ''.join(imap(chr, imap(0x80.__or__,imap(ord,line))))


scramble_table = dict((chr(i), chr(i | 0x80)) for i in xrange(255))

def scramble_dict(line):
     s = ''
     for c in line:
         s += scramble_table[c]
     return s

def scramble_dict_map(line):
     return ''.join(map(scramble_table.__getitem__, line))

def scramble_dict_imap(line):
     return ''.join(imap(scramble_table.__getitem__, line))


if __name__=='__main__':
    funcs = [scramble, scramble_listcomp, scramble_gencomp,
             scramble_map, scramble_imap,
             scramble_dict, scramble_dict_map, scramble_dict_imap]
    s = 'abcdefghijklmnopqrstuvwxyz' * 100
    assert len(set(f(s) for f in funcs)) == 1
    from timeit import Timer
    setup = "import __main__; line = %r" % s
    for name in (f.__name__ for f in funcs):
        timer = Timer("__main__.%s(line)" % name, setup)
        print '%s:\t%.3f' % (name, min(timer.repeat(3,1000)))


George



From deets at nospam.web.de  Thu Sep 13 04:36:06 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 13 Sep 2007 10:36:06 +0200
Subject: Possible suggestion for removing the GIL
References: <1189657576.772108.136550@d55g2000hsg.googlegroups.com>
Message-ID: <5ksb3mF5828oU1@mid.uni-berlin.de>

Prateek wrote:

> Hi,
> 
> Recently there was some talk on removing the GIL and even the BDFL has
> written a blog post on it.
> I was trying to come up with a scalable and backwards compatible
> approach for how to do it.
> 
> I've put my thoughts up in a blog post - and I'd really like to hear
> what the community thinks of it.
> Mainly it revolves around dedicating one core for executing
> synchronized code and doing context switches instead of acquiring/
> releasing locks.

Where is the gain? Having just one core doesn't give you true parallelism -
which is the main reason behind the cries for a GIL-less Python.

Diez


From gregor.kling at its.fh-giessen.de  Tue Sep  4 04:03:40 2007
From: gregor.kling at its.fh-giessen.de (Gregor Kling)
Date: Tue, 04 Sep 2007 10:03:40 +0200
Subject: pickle error/instancemethod
Message-ID: <46DD115C.2030408@its.fh-giessen.de>

Hello,

I have some of these nefarious pickle errors I do not understand,
maybe some of you have a clue.

This is what I get
(nd is the object which I want to pickle [cPickle.dumps(nd,2)], with
the printout of nd.__dict__):

 ERROR Error: Can't pickle <type 'instancemethod'>: attribute lookup
__builtin__.instancemethod failed, nd: {'dvzLogger':
<dvzrv.DVZlogging.DVZlogger.DVZlogger object at 0x8b7
6bac>, '_DVZnetzDataBase__netzentries':
[<dvzrv.db.containers.DVZnetzData.DVZnetzDataEntry object a
t 0x8a8e08c>], '_DVZnetzDataBase__option_fqdn_alias':
set(['a.b.c']), '_DVZnetzDataBase__admins': set([]),
'_DVZnetzDataBase__aliasentries': []}


I follow the hints on http://docs.python.org/lib/node318.html, so I
do not understand the source of the problem. I do not try to pickle
an instancemethod directly. The dict does apparently contains only
top level tuples, lists, sets, and dictionaries, classes/instances.

So if more Data is needed to analyse the problem - demand.

gfk

-- 
gfk
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From dimitri.pater at gmail.com  Wed Sep  5 08:53:43 2007
From: dimitri.pater at gmail.com (dimitri pater)
Date: Wed, 5 Sep 2007 14:53:43 +0200
Subject: StringIO MySQL data blob Image problem
Message-ID: <e75321bd0709050553h5e3302f7lf59f10104895ff5d@mail.gmail.com>

Hi,

I am trying to insert an image, which is stored as a blob in MySQL,
into a table using Reportlab.

I have tried this:
from StringIO import StringIO
cfoto = StringIO(result[0][1]) # where result[0][1] is the 'blob'
cfoto.seek(0)
foto=cfoto.getvalue

But when I do:
print foto, I see something similar to this:
array('c','\xff\xd8\............etc.......etc......')
This is also the string I see in the table, in stead of the actual image.

I have tried:
cfoto StringIO()
cfoto.write(result[0][1].tostring())
foto=cfoto.getvalue()
that returns:
?????lbo?q?5???\???????Y|A???,????
"??m3Z???f??""N?,?????I??t"?b5?@xq?'?k????s??d???????1???
?^?J?*?C(r)?{:t??_??????jo??
?C(c)???[)?gN???X?i etc... etc...
and return an UnicodeDecodeError when I try to insert this into the table

Any ideas or clues someone? Your help is appreciated.
Dimitri
(BTW, the MySQL image blob is valid, it shows up in MySQL Query Browser)

-- 
---
You can't have everything. Where would you put it? -- Steven Wright
---
please visit www.serpia.org


From fabiofz at gmail.com  Tue Sep 11 06:58:03 2007
From: fabiofz at gmail.com (Fabio Zadrozny)
Date: Tue, 11 Sep 2007 07:58:03 -0300
Subject: Setting stdout encoding
In-Reply-To: <op.tygmb9nux6zn5v@gabriel2.softlabbsas.com.ar>
References: <1189416350.069995.220250@w3g2000hsg.googlegroups.com>
	<cfb578b20709100602i4146f5c0hd2a1343f644a90f@mail.gmail.com>
	<op.tygmb9nux6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <cfb578b20709110358n5801c19ie21d95ef1161e4c0@mail.gmail.com>

>
> You could place code like that on sitecustomize.py
> I think this should be fixed on Eclipse/pydev. If they replace sys.stdout
> with a different object - they should make sure it has the right behavior.
> Same for IDLE if it's broken too.
>

Thanks for the tip... I wasn't aware of sitecustomize.py (site.py does call
that just before removing setdefaultencoding() from sys, so I can still use
sys.setdefaultencoding)... actually, setencoding() from site.py does have
what I would like to execute:
    if 0:
        # Enable to support locale aware default string encodings.
        import locale
        loc = locale.getdefaultlocale()
        if loc[1]:
            encoding = loc[1]

I just don't get why the code has that "if 0:" instead of getting it from
some user-config (like env variable or parameters passed)...

Anyways, thanks a lot... I think I can arrange in providing a
sitecustomize.py from pydev with that structure.

Cheers,

Fabio
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From zunbeltz at gmail.com  Fri Sep  7 09:08:19 2007
From: zunbeltz at gmail.com (zunbeltz at gmail.com)
Date: Fri, 07 Sep 2007 06:08:19 -0700
Subject: exponential float formmating
Message-ID: <1189170499.945175.275210@57g2000hsv.googlegroups.com>

Hi,

For compatibility reasons with an old program I have to format string
in exponential
format with the following format

0.xxxxxE-yy

This means that the number start always by 0 and after the exponent
there should be alway the sing and 2 number for the exponent.

for example 13 shoud be 0.13000E+02
I always get 1.30000E001

Thanks,

Zunbeltz



From ldo at geek-central.gen.new_zealand  Sat Sep 22 00:50:34 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 22 Sep 2007 16:50:34 +1200
Subject: Building Python with VC8 on x86-64 Vista
References: <1190299551.573204.322440@57g2000hsv.googlegroups.com>
Message-ID: <fd26uq$i2a$1@lust.ihug.co.nz>

In message <1190299551.573204.322440 at 57g2000hsv.googlegroups.com>, 
danfike at gmail.com wrote:

> Though I don't know how useful it is, I did open the python libraries
> in wordpad, and though most of the file wasn't legible, I did find
> strings "Py_NoneStruct," "Py_RefTotal," and "PyExc_IndexError."

Do you have some equivalent of the "nm" command for dumping the symbols and
their definitions in the library?


From iclark at mail.ewu.edu  Fri Sep 14 18:50:44 2007
From: iclark at mail.ewu.edu (Ian Clark)
Date: Fri, 14 Sep 2007 15:50:44 -0700
Subject: Spaces from string specifier
In-Reply-To: <op.tymtphaqx6zn5v@gabriel2.softlabbsas.com.ar>
References: <03a601c7f68b$ccdf1ed0$669d5c70$@com>
	<op.tymtphaqx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <fcf385$tmf$1@sea.gmane.org>

Gabriel Genellina wrote:
> En Fri, 14 Sep 2007 01:57:43 -0300, Gavin Tomlins <gavin at madzag.com>  
> escribi???:
> 
>> I'm trying to work out when using a format specifier I get spaces in the
>> resulting string.  Eg. Looking at the outputted string you can see that
>> there are spaces after T5LAT, F4LAT etc. as I result from trying to keep  
>> the
>> code aligned
> 
> - You should *not* build the SQL text yourself; use a parametrised query  
> instead. It's not only easier to write; it's safer, less error prone, and  
> maybe faster. See this previous post  
> <http://groups.google.com/group/comp.lang.python/browse_thread/thread/b8c1ef8471f55995/>
> 
> - Spaces are not significant in SQL, but you may have your own reasons to  
> format the SQL text in a certain way. In addition to the ideas already  
> menctioned on that thread (avoid \, use parenthesis, and auto-concatenate  
> adjacent strings), you may use a triple-quoted string + function dedent  
>  from textwrap module:
> 
> py> fmtSqlP300Amp = textwrap.dedent('''\
> ...           UPDATE Patient SET
> ...             O2AMP = "%s", O1AMP = "%s", OzAMP = "%s", PzAMP = "%s",
> ...             P4AMP = "%s", CP4AMP = "%s", T6AMP = "%s", C4AMP = "%s",
> ...             TP8AMP = "%s", T4AMP = "%s", T5AMP = "%s", P3AMP = "%s"
> ...           WHERE Pat_Id = "%s"''')
> py> print fmtSqlP300Amp
> UPDATE Patient SET
>    O2AMP = "%s", O1AMP = "%s", OzAMP = "%s", PzAMP = "%s",
>    P4AMP = "%s", CP4AMP = "%s", T6AMP = "%s", C4AMP = "%s",
>    TP8AMP = "%s", T4AMP = "%s", T5AMP = "%s", P3AMP = "%s"
> WHERE Pat_Id = "%s"
> 
> I hope any of these ideas will fit your own needs.

Completely agree that this should not be written by hand. But if you 
absolutely *must* you might try something like this:

     >>> fmt = """
     ...     UPDATE Patient SET
     ...     02AMP = "%(o2amp)s"
     ...     O1AMP = "%(o1amp)s"
     ...     ...
     ... """
     >>> args = {
     ...     'o1amp': "2.77413",
     ...     'o2amp': "2.43119"
     ... }
     >>> print fmt % args

             UPDATE Patient SET
             02AMP = "2.43119"
             O1AMP = "2.77413"
             ...

     >>>

Ian



From aahz at pythoncraft.com  Tue Sep 18 12:08:37 2007
From: aahz at pythoncraft.com (Aahz)
Date: 18 Sep 2007 09:08:37 -0700
Subject: Using pseudonyms (was Re: Python 3K or Python 2.9?)
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46ef893c$0$21882$426a34cc@news.free.fr>
	<fcop08$2ue$1@panix3.panix.com>
	<mailman.726.1190130940.2658.python-list@python.org>
Message-ID: <fcot65$1us$1@panix3.panix.com>

In article <mailman.726.1190130940.2658.python-list at python.org>,
Steve Holden  <steve at holdenweb.com> wrote:
>Aahz wrote:
>> In article <46ef893c$0$21882$426a34cc at news.free.fr>,
>> Bruno Desthuilliers  <bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote:
>>> Aahz a ?crit :
>>>> In article <46ee2d9d$0$26213$426a74cc at news.free.fr>,
>>>> Bruno Desthuilliers  <bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote:
>>>>>
>>>>> But what, given that I'm an AOL user still thinking it's kewl to hide 
>>>>> behind a pseudo, what else would you expect ?
>>>>
>>>> What exactly is a "pseudo", pray tell?
>>>
>>> Sorry : a pseudonym (a nickname).
>> 
>> You apparently missed the thrust of my sarcasm.  You can't tell what is
>> or is not a pseudonym online.  For all I know, "Bruno Desthulliers" is a
>> pseudonym.  While I recognize that there is some social advantage to
>> linking consistent identifiers with people, I have I think understandable
>> irritation with people who insist that names follow certain patterns.
>> 
>> (For those joining only recently, my full legal name is "Aahz", which I
>> changed from my former name precisely because of attitudes like Bruno's.)
> 
>... coupled with a certain bloody-mindedness that forces you to rub 
>people's noses in your ability to choose to do so? ;-)

While there's certainly some truth to that, it is also the case that I
have seen people like Bruno take exception to some people's born names.
After all, there are people whose parents chose to name them "Moon Unit".

For that matter, there are plenty of people who are better known by some
nickname that is not their legal name.  And even before I changed my
name, I had plenty of problems from people believing that my name was a
nickname and "helpfully" fixing it.  (Which is really where my attitude
comes from, and the practical difficulties of having only one legal name
are not that much larger than my former difficulties.)  Overall, I think
that Bruno's attitude is more injurious to community than letting people
be known by whatever name they choose.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

The best way to get information on Usenet is not to ask a question, but
to post the wrong information.


From pavlovevidence at gmail.com  Sat Sep 29 21:53:32 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sat, 29 Sep 2007 18:53:32 -0700
Subject: getopt with negative numbers?
In-Reply-To: <87zlz510tw.fsf@benfinney.id.au>
References: <1190913250.198794.269530@k79g2000hse.googlegroups.com>
	<fdgpic$ssu$00$1@news.t-online.com>
	<1190915197.390247.313590@57g2000hsv.googlegroups.com>
	<fdgri5$ssu$00$2@news.t-online.com>
	<mailman.1182.1190917341.2658.python-list@python.org>
	<1190930134.780005.68510@22g2000hsm.googlegroups.com>
	<mailman.1196.1190937544.2658.python-list@python.org>
	<1190944143.521085.66910@g4g2000hsf.googlegroups.com>
	<871wcj4ib9.fsf@benfinney.id.au>
	<1190999036.588941.165610@g4g2000hsf.googlegroups.com>
	<GdednaFCqLj6oGDbnZ2dnUVZ_g6dnZ2d@comcast.com>
	<87odfm3021.fsf@benfinney.id.au>
	<1191021322.905791.21300@r29g2000hsg.googlegroups.com>
	<87zlz510tw.fsf@benfinney.id.au>
Message-ID: <1191117212.572680.36290@r29g2000hsg.googlegroups.com>

On Sep 29, 7:58 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> Carl Banks <pavlovevide... at gmail.com> writes:
> > On Sep 28, 6:19 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
> > wrote:
> > > Steven Bethard <steven.beth... at gmail.com> writes:
> > > > A user shouldn't have to go out of their way to specify regular
> > > > numbers on the command line, regardless of whether they're
> > > > positive or negative.
>
> > > A user shouldn't have to go out of their way to know whether what
> > > they type on a command line will be treated as an option or an
> > > argument.
>
> > I guess typing
> > ./program --help
>
> > is out of the question.
>
> You're trying to have it both ways.
>
> You're saying the user "shouldn't have to go out of their way" to type
> arbitrary arguments on the command line.

No, I'm not.  Don't put words in my mouth.

I don't think it's "going out of your way" to read the documentation,
or to put a couple hyphens on the line.  Those were your words, and
they were an utterly silly hyperbole.


> Then, in your next message,
> you suggest they must *read the detailed command-line help* in order
> to know whether they *can* type arbitrary command-line arguments.

You're writing a program that takes numerical positional arguments.

Are you being more of asshole ir you
A. Expect me to read the documentation, or
B. Force me to type two hyphens every single time I want to enter a
negative number?

I would say B by a mile.

Not that it's "going out of my way" to enter the extra hyphens; it's
just irritating and completely, totally, and utterly unnecessary.


> Is "learn about how the program expects options and arguments" within
> your definition of "go out of their way", or isn't it? If it's not,
> then "shouldn't have to go out of their way" is *not* an argument in
> favour of special-casing negative-numbers.

It's only a special case in your imagination.  Try typing this:

seq -9 -1

On my system, seq is a GNU tool, and the guys at the FSF are some of
the biggest tightwads around when it comes to command line options.
Even when they allow nonconformant options for the sake of backwards
compatibility, they run a guilt trip on you.  But even they see the
practicality in allowing negative number arguments in some cases.


Carl Banks



From wolf_tracks at invalid.com  Thu Sep 20 12:31:07 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Thu, 20 Sep 2007 16:31:07 GMT
Subject: An Editor that Skips to the End of a Def
Message-ID: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>

Is there an editor that allows one to position to put the cursor and then by 
pushing some button goes to the end of the def?
-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From andres.j.new at gmail.com  Sun Sep 30 21:35:09 2007
From: andres.j.new at gmail.com (andresj)
Date: Mon, 01 Oct 2007 01:35:09 -0000
Subject: Using fractions instead of floats
Message-ID: <1191202509.853059.222530@k79g2000hse.googlegroups.com>

I was doing some programming in Python, and the idea came to my mind:
using fractions instead of floats when doing 2/5.

The problem arises when you try to represent some number, like 0.4 in
a float. It will tell you that it's equal to 0.40000000000000002.
"This is easy to fix", you may say. "You just use the decimal.Decimal
class!". Well, firsly, there would be an excess of typing I would need
to do to calculate 0.4+0.6:

from decimal import Decimal
print Decimal("0.4")+Decimal("0.6")

Secondly, what happens if I need to sum 1/3 and 0.4? I could use
Decimal to represent 0.4 precisely, but what about 1/3? Sure, I could
use _another_ class which works in a base (binary, decimal, octal,
hexadecimal) in which 1/3 can be represented exactly... Not to mention
the problem of operating with those two different classes...

So the solution I think is using a fraction type/class, similar to the
one found in Common Lisp. If you have used CLisp before, you only need
to type:
(+ 1/3 6/10)
to get the exact result. (Yes, I also hate the (operator arg1 arg2)
syntax, but it's just an example). I would like to have something
similar in Python, in which dividing two numbers gives you a fraction,
instead of an integer (python 2.x) or a float (decided for python
3.x).

an implementation could be like this:
class frac(object):     # PS: This (object) thing will be removed in
python 3.0, right?
    def __init__(self, numerator, denominator):
        pass
    def __add__(self, other):
        pass
    #...

(I have an implementation of the frac class done (this meaning, it
works for me), and although it's pretty dirty, I'd be happy to post it
here if you want it.)

My idea, in summary would be that this python shell session is true:
>>> 5/2
2 1/2
>>> f = 5/2
>>> f.__class__
<type 'frac'>
>>> # or <class 'frac'>
>>> (0.6).__class__     # Treat decimal literals as fractions, so that...
<type 'frac'>
>>> 1/3+0.6
14/15
>>> # That was easy. ;)

I would like to get some feedback on this idea. Has this been posted
before? If so, was it rejected? and for what?
Also, I would like to know if you have improvements on the initial
design, and if it would be appropiate to send it as a PEP.



From knipknap at gmail.com  Mon Sep  3 16:01:54 2007
From: knipknap at gmail.com (Samuel)
Date: Mon, 03 Sep 2007 13:01:54 -0700
Subject: Python object <-> XML
Message-ID: <1188849714.128121.139450@r34g2000hsd.googlegroups.com>

Hi,

Say you have the following XML:

<item ref="1">
  <name>item 1</name>
</item>
<item ref="2">
  <name>item 2</name>
</item>
<group>
  <item ref="1" />
  <item ref="2" />
  <name>my group</name>
</group>

Is there an easy way (i.e. without writing a sax/dom parser) to load
this into a (number of) Python object(s), manipulate the instance, and
save the result back to XML?

-Samuel



From tuomas.vesterinen at pp.inet.fi  Tue Sep  4 15:54:57 2007
From: tuomas.vesterinen at pp.inet.fi (Tuomas)
Date: Tue, 04 Sep 2007 19:54:57 GMT
Subject: Undeterministic strxfrm?
In-Reply-To: <mailman.37.1188933223.2658.python-list@python.org>
References: <ixaDi.63$327.50@read3.inet.fi>
	<mailman.37.1188933223.2658.python-list@python.org>
Message-ID: <lKiDi.237$327.182@read3.inet.fi>

Gabriel Genellina wrote:
> En Tue, 04 Sep 2007 07:34:54 -0300, Tuomas 
> <tuomas.vesterinen at pp.inet.fi>  escribi?:
> 
>> Python 2.4.3 (#3, Jun  4 2006, 09:19:30)
>> [GCC 4.0.0 20050519 (Red Hat 4.0.0-8)] on linux2
>> Type "help", "copyright", "credits" or "license" for more information.
>>  >>> import locale
>>  >>> def key(s):
>> ...     locale.setlocale(locale.LC_COLLATE, 'en_US.utf8')
>> ...     return locale.strxfrm(s.encode('utf8'))
>> ...
>>  >>> first=key(u'maupassant guy')
>>  >>> first==key(u'maupassant guy')
>> False
>>  >>> first
>> '\x18\x0c \x1b\x0c\x1e\x1e\x0c\x19\x1f\x12
>> $\x01\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x01\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x01\xf5\xb79' 
>>
>>  >>> key(u'maupassant guy')
>> '\x18\x0c \x1b\x0c\x1e\x1e\x0c\x19\x1f\x12
>> $\x01\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x01\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x01\xb5' 
>>
>>  >>>
>>
>> May be this is enough for a sort order but I need to be able to catch
>> equals too. Any hints/explanations?
> 
> 
> I can't use your same locale, but with my own locale settings, I get  
> consistent results:
> 
> Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit  
> (Intel)] on
> win32
> Type "help", "copyright", "credits" or "license" for more information.
> py> import locale
> py> locale.setlocale(locale.LC_COLLATE, 'Spanish_Argentina')
> 'Spanish_Argentina.1252'
> py> def key(s):
> ...   return locale.strxfrm(s.encode('utf8'))
> ...

Because I am writing a multi language application I need to plase the 
locale setting inside the key function. Actually I am implementing 
binary search in a locally sorted list of strings and should be able to 
count on stable results of strxfrm despite possibly visiting another 
locale at meantime. Could repeated calls to setlocale cause some problems?

> py> first=key(u'maupassant guy')
> py> print repr(first)
> '\x0eQ\x0e\x02\x0e\x9f\x0e~\x0e\x02\x0e\x91\x0e\x91\x0e\x02\x0ep\x0e\x99\x07\x02 
> 
> \x0e%\x0e\x9f\x0e\xa7\x01\x01\x01\x01'
> py> print repr(key(u'maupassant guy'))
> '\x0eQ\x0e\x02\x0e\x9f\x0e~\x0e\x02\x0e\x91\x0e\x91\x0e\x02\x0ep\x0e\x99\x07\x02 
> 
> \x0e%\x0e\x9f\x0e\xa7\x01\x01\x01\x01'
> py> print first==key(u'maupassant guy')
> True
> 
> Same thing with Python 2.4.4
> 

I get the same unstability with my locale 'fi_FI.utf8' too, so I am 
wondering if the source of the problem is the clib or the Python wrapper 
around it. Differences in strxfrm results for identical source are 
allways in the few latest bytes of the results.





From bj_666 at gmx.net  Fri Sep  7 19:17:55 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 7 Sep 2007 23:17:55 GMT
Subject: Speed of Python
References: <mailman.257.1189205974.2658.python-list@python.org>
Message-ID: <5ke4h3F31i6hU9@mid.uni-berlin.de>

On Fri, 07 Sep 2007 22:59:26 +0000, wang frank wrote:

> I also have tried to use numpy to speed it up. However, surprisingly, it is 
> slower than the pure python code.
> 
> Here is the code:
> import  numpy 
> arange=numpy.arange
> nlog=numpy.log
> def bench6(n):
> 	for i in xrange(n):
> 		for j in xrange(1000):
> 			m=j+1
> 			z=nlog(m)
> 			z1=nlog(m+1)
> 			z2=nlog(m+2)
> 			z3=nlog(m+3)
> 			z4=nlog(m+4)
> 			z5=nlog(m+5)
> 			z6=nlog(m+6)
> 			z7=nlog(m+7)
> 			z8=nlog(m+8)
> 			z9=nlog(m+9)
> 	return z9	
> 
> [?]
> 
> Anyone know why?

Because you don't really take advantage of `numpy`.  The `numpy.log()`
function can be used with scalars but I guess it is slower because it has
to check if its argument is a scalar or array.  Untested:

from numpy import arange, log as nlog

def bench6(n):
    for dummy in xrange(n):
        for j in xrange(1000):
            z = nlog(arange(j + 1, j + 11))
    return z[-1]


From gagsl-py2 at yahoo.com.ar  Mon Sep 24 04:00:42 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 24 Sep 2007 05:00:42 -0300
Subject: TRying to import files from my folder not pythons lib folder
References: <1190395964.541835.114350@50g2000hsm.googlegroups.com>
	<1190396569.732154.234270@r29g2000hsg.googlegroups.com>
	<mailman.883.1190399436.2658.python-list@python.org>
	<1190595699.093793.100960@w3g2000hsg.googlegroups.com>
Message-ID: <op.ty5e7geux6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 23 Sep 2007 22:01:39 -0300, Luis M. Gonz?lez <luismgz at gmail.com>  
escribi?:

> This is exactly what I did, but I have a new problem now:
> After seting PYTHONPATH I'm no longer able to start IDLE from the
> start menu.
> It seems the system cannot find the file.
> But if I eliminate PYTHONPATH, everything works as it used to.
>
> I set PYTHONPATH because I wanted to import any existing file in my
> desktop without having to use sys.path.append...
> It works when using the command line but strangely, something get
> messed up with IDLE.
> Any hint?

Perhaps a python module in your desktop has a name conflicting with a  
standard module?

- On the Start menu, navigate to the IDLE item, but dont click it.
- RIGHT click on it, and select Properties. Copy the Destination field.  
Should be something like "C:\Python25\Lib\idlelib\idle.bat"
- Open a cmd window (console), paste the above text and press Enter.
- Almost certainly you'll get an error; post here the full error and  
traceback.

-- 
Gabriel Genellina



From madzientist at gmail.com  Tue Sep 11 13:38:42 2007
From: madzientist at gmail.com (madzientist)
Date: Tue, 11 Sep 2007 10:38:42 -0700
Subject: Python code-writing for the blind. Was (Re: newbie: stani's
	python editor if-else)
In-Reply-To: <b32e4$46e6cfc2$547078de$7728@news.chello.at>
References: <1189484688.520933.25000@22g2000hsm.googlegroups.com>
	<mailman.381.1189514109.2658.python-list@python.org>
	<46e6aa30$0$22433$426a74cc@news.free.fr>
	<1189531123.283413.160870@22g2000hsm.googlegroups.com>
	<b32e4$46e6cfc2$547078de$7728@news.chello.at>
Message-ID: <1189532322.708734.274470@r29g2000hsg.googlegroups.com>


Thanks, Gregor. Very helpful thread.

Suresh

On Sep 11, 1:26 pm, Gregor Horvath <g... at gregor-horvath.com> wrote:
> madzientist schrieb:
>
>
>
> > Is Python a bad choice for the blind programmer, as a result of a
> > tight linkage between visual aspects of the code and its function ? I
> > wish the site blindprogramming.com weren't so lifeless...
>
> There was a thread regarding blind people and python indentation shortly:
>
> http://groups.google.com/group/comp.lang.python/browse_thread/thread/...
>
> Gregor




From __peter__ at web.de  Wed Sep 12 07:56:22 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 12 Sep 2007 13:56:22 +0200
Subject: Get Only the Last Items in a Traceback
References: <1189562968.529414.27910@w3g2000hsg.googlegroups.com>
	<dmnkr4-dpq.ln1@nb2.stroeder.com>
Message-ID: <fc8k56$fmj$01$1@news.t-online.com>

Am Wed, 12 Sep 2007 11:21:48 +0200 schrieb Michael Str?der:

> gregpinero at gmail.com wrote:
>> I'm running code via the "exec in context" statement within a much
>> larger program.  What I would like to do is capture any possible
>> errors and show a pretty traceback just like the Python interactive
>> interpreter does, but only show the part of the traceback relating to
>> the code sent to exec.
>> 
>> For example here is the code I'm using:
>> 
>> try:
>>     exec code
>> except Exception,Err:
>>     traceback.print_exc()
> 
> Guess what's argument limit is for. Excerpt from the Python docs:

Unfortunately traceback.print_exc(limit=N) trims the wrong end of the
traceback:

>>> def alpha(): beta()
... 
>>> def beta(): gamma()
... 
>>> def gamma(): 1/0
... 
>>> try:
...     alpha()
... except:
...     traceback.print_exc()
... 
Traceback (most recent call last):
  File "<stdin>", line 2, in <module>
  File "<stdin>", line 1, in alpha
  File "<stdin>", line 1, in beta
  File "<stdin>", line 1, in gamma
ZeroDivisionError: integer division or modulo by zero
>>> try:
...     alpha()
... except:
...     traceback.print_exc(limit=1)
... 
Traceback (most recent call last):
  File "<stdin>", line 2, in <module>
ZeroDivisionError: integer division or modulo by zero
>>>

Peter


From carsten at uniqsys.com  Thu Sep 13 15:13:15 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 13 Sep 2007 15:13:15 -0400
Subject: Quick Modules question
In-Reply-To: <eb79828c0709131201l67c61210lc47d2a82b6c766a0@mail.gmail.com>
References: <eb79828c0709131201l67c61210lc47d2a82b6c766a0@mail.gmail.com>
Message-ID: <1189710795.3407.11.camel@dot.uniqsys.com>

On Thu, 2007-09-13 at 14:01 -0500, Lamonte Harris wrote:
> How do you import modules that aren't in the main python Lib folder?
> Is it possible to keep it in the same file as the script thats being
> ran?

See http://docs.python.org/tut/node8.html#SECTION008110000000000000000
and http://catb.org/~esr/faqs/smart-questions.html#before .

-- 
Carsten Haese
http://informixdb.sourceforge.net




From gregturn at mindspring.com  Wed Sep 12 08:25:38 2007
From: gregturn at mindspring.com (Goldfish)
Date: Wed, 12 Sep 2007 05:25:38 -0700
Subject: Spring Python 0.3.0 is released!
Message-ID: <1189599938.930862.308330@g4g2000hsf.googlegroups.com>

Spring Python (http://springpython.python-hosting.com) version 0.3.0
was released yesterday.

Key improvements include:
* Make the web components WSGI-compatible, firstly working with
CherryPy.
* Extend PetClinic to use database accounts and have password
encoding.
* Add an ExceptionTranslationFilter so PetClinic handles errors more
sophisticated.
* Relicense Spring Python underneath GPLv3.
* Generally, clean up the code and test cases. Also start using code
coverage tools to improve quality of testing.



From mail at timgolden.me.uk  Thu Sep 20 11:29:36 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 20 Sep 2007 16:29:36 +0100
Subject: Python-list Digest, Vol 48, Issue 301
In-Reply-To: <200709201724.23611.cscheit@lstm.uni-erlangen.de>
References: <mailman.2897.1190299804.2656.python-list@python.org>
	<200709201724.23611.cscheit@lstm.uni-erlangen.de>
Message-ID: <46F291E0.40000@timgolden.me.uk>

Christoph Scheit wrote:
> Hello,
> 
> is there a way to do something like
> for i,j in l1, l2:
>     print i,j

I'm assuming that l1 and l2 are in fact
lists (or at least sequences). If that's
the case:

<code>
l1 = [1, 2, 3]
l2 = ['a', 'b', 'c']

for i, j in zip (l1, l2):
   print i, j

</code>

TJG


From ricaraoz at gmail.com  Sun Sep  2 13:55:57 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Sun, 02 Sep 2007 14:55:57 -0300
Subject: localizing a sort
In-Reply-To: <1i3t4p6.12j3kffgcfjoN%aleax@mac.com>
References: <mailman.283.1188683800.28954.python-list@python.org>	<fbdv47$jcm$03$1@news.t-online.com>	<mailman.293.1188746375.28954.python-list@python.org>
	<1i3t4p6.12j3kffgcfjoN%aleax@mac.com>
Message-ID: <46DAF92D.3030000@bigfoot.com>

Alex Martelli wrote:
> Ricardo Ar?oz <ricaraoz at gmail.com> wrote:
>> Peter Otten wrote:
>    ...
>>>>>>> print ''.join(sorted(a, cmp=lambda x,y: locale.strcoll(x,y)))
>>>> aeiou???????????????
>>> The lambda is superfluous. Just write cmp=locale.strcoll instead.
>> No it is not :
>>>>> print ''.join(sorted(a, cmp=locale.strcoll(x,y)))
>> Traceback (most recent call last):
>>   File "<input>", line 1, in <module>
>> TypeError: strcoll expected 2 arguments, got 0
>>
>> You need the lambda to assign both arguments.
> 
> No, your mistake is that you're CALLING locale.strcoll, while as Peter
> suggested you should just PASS it as the cmp argument.  I.e.,
> 
>     ''.join(sorted('ciao', cmp=locale.strcoll))
> 
> Using key=locale.strxfrm should be faster (at least when you're sorting
> long-enough lists of strings), which is why strxfrm (and key=...:-)
> exist in the first place, but cmp=locale.strcoll, while usually slower,
> is entirely correct.  That lambda _IS_ superfluous, as Peter said.
> 
> 
> Alex

Got it! And it is MUCH more elegant than my code. Thanks.




From blackmh at gmail.com  Sun Sep  2 14:04:04 2007
From: blackmh at gmail.com (Kveldulv)
Date: Sun, 02 Sep 2007 11:04:04 -0700
Subject: Glade + Python = No GUI
In-Reply-To: <46daf2de$0$4530$9b4e6d93@newsspool3.arcor-online.net>
References: <1188750465.530463.271750@22g2000hsm.googlegroups.com>
	<46daf2de$0$4530$9b4e6d93@newsspool3.arcor-online.net>
Message-ID: <1188756244.873383.54490@d55g2000hsg.googlegroups.com>

On Sep 2, 7:29 pm, Wildemar Wildenburger
<lasses_w... at klapptsowieso.net> wrote:

>
> Shouldnt there be more to that error message of yours? I would expect
> something like "NameError: name 'gtk' is not defined"?
>
> Because as it seems you haven't impored gtk (only gtk.glade). So adding
> "import gtk" at the beginning should help.
>
> I may be wrong; I recall some weird importing requirements for pygtk, so
> I'm not sure if I'm to uninformed to see the actual problem.
>
> /W


Nope, everything imports well, no errors. With import gtk added,
I get the same thing...



From chris.monsanto at gmail.com  Fri Sep 21 17:48:02 2007
From: chris.monsanto at gmail.com (chris.monsanto at gmail.com)
Date: Fri, 21 Sep 2007 21:48:02 -0000
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
Message-ID: <1190411282.060772.289270@y42g2000hsy.googlegroups.com>

On Sep 21, 5:37 pm, Cristian <super.sgt.pep... at gmail.com> wrote:
> A friend of mine is an engineer and he's been needing to do more and
> more programming as he goes on with is career. I convinced him to
> learn Python instead of Perl and he's really started to like it. He
> usually comes to me when he can't accomplish a task with his current
> knowledge and I introduce him to a new feature in Python. FYIW, he
> thought List Comprehensions were freakin' awesome. He's started
> writing his own personal scripts for tasks like web scraping. So, from
> personal experience, Python truly is a great first language to learn.
>
> Although his learning experience has gone mostly smoothly, he's hit a
> lot of speed bumps with functions. Specifically, he's having trouble
> thinking of functions as first order data (don't worry, I haven't
> confused him with such terminology yet). He had a little trouble
> understanding that you can pass functions as arguments to other
> functions (e.g., passing a key to the list.sort method). He also had a
> little trouble grasping functions within other functions. Last but not
> least, he had trouble grasping methods in class declarations,
> especially the required self as the first argument (I'm sure he wasn't
> the first).
>
> Now, my friend's a smart guy so I know it isn't any lack of brain
> cells on his part. I still remember many students in my CS classes
> having trouble grasping the very same concept. And, after we finally
> get a hold of first order functions, we appreciate its incorporation
> into languages. It would be a shame if my friend just learns the
> motions and never incorporates first order functions into his
> programs. I began to wonder if there was anything Python could do to
> help newcomers grasp the power of first order functions or, as
> Pythonistas put it, everything is an object.
>
> To me, the biggest setback for new programmers is the different syntax
> Python has for creating functions. Instead of the common (and easy to
> grasp) syntax of foo = bar Python has the def foo(): syntax. So, when
> a new programmer is first introduced to functions they are immediately
> confronted with the notion that functions are "different". After all,
> they have their own special syntax. This seems to only further the
> separation newbies make between "data" and "functions" or "stuff" and
> "actions". Now, the vast majority of us learned this dichotomy when we
> first began to program, so we are ingrained to assume and even expect
> a different syntax for function declaration, but in a program like
> Python there doesn't seem to be any other reason to have it.
> Furthermore, I think it actually inhibits the learning of the
> uninitiated. We can, of course, keep the current syntax as sugar.
>
> To someone who's learning to program wouldn't a syntax like the
> further give them all they need and also reinforces the idea that
> functions are data just like everything else?
>
> my_function = function(foo, bar): pass
> an_instance_method = function(self, foo): pass
> a_method_declaration = method(self, foo): pass
>
> The last one is mostly my pet peeve of having Python "magically"
> create methods out of (what is essentially) a function declaration.
> When I first learned it, it felt wrong but you had to press through it
> because there was really no other way of declaring methods.
>
> What do you think? Have you hit this roadblock when helping others
> learn Python? Does the current syntax make you feel that functions are
> still treated as second class (get it?) citizens?

There are already anonymous functions in Python.

lambda x, y, z: x + y + z

is the same as:

def _(x, y, z): return x + y + z

As for the method stuff, check out staticmethod(). If you assign
staticmethod(<function here>) to an object, it will be treated as a
normal function and not as a "method."

I have my own personal opinions about how methods should be in Python,
but, whatever. It's weird to deal with stuff like this:

x.y = re.match # Assign a function to an attribute of a class, but it
doesn't work because you can't assign anything but methods!
x.y = staticmethod(re.match) # Ugly



From steve at REMOVE-THIS-cybersource.com.au  Sat Sep  1 03:52:21 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sat, 01 Sep 2007 07:52:21 -0000
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<1188497498.3468.60.camel@dot.uniqsys.com>
	<mailman.188.1188546300.28954.python-list@python.org>
	<0v2dnaYWyv4HWkrbnZ2dnUVZ_oTinZ2d@speakeasy.net>
	<1188551958.728836.137370@x35g2000prf.googlegroups.com>
	<fOadnfwlCJbQfErbnZ2dnUVZ_jCdnZ2d@speakeasy.net>
	<6ftgd35rd1g4mddqg2f44d7svd4r85ev17@4ax.com>
	<13dhvs3p5drsd99@corp.supernews.com> <87ejhic0iv.fsf@benfinney.id.au>
Message-ID: <13di6hlnl7hhnfd@corp.supernews.com>

On Sat, 01 Sep 2007 17:23:04 +1000, Ben Finney wrote:

> Dennis Lee Bieber <wlfraed at ix.netcom.com> writes:
> 
>> I suppose you also add an extra "i" to aluminum <G>
> 
> We're not out to rewrite the table of elements. There's no such thing as
> "aluminum", and "aluminium" always has just the two "i"s.

Although aluminium is the one and only correct spelling *grins*, it is 
not actually true that it has always been spelt that way (or for you 
Merkins out there, spelled). The discoverer of aluminium, Sir Humphrey 
Davy, originally spelt it alumium, then aluminum, and finally 
standardized on aluminium.

http://www.worldwidewords.org/articles/aluminium.htm


-- 
Steven.


From steve at holdenweb.com  Sat Sep  1 08:38:12 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 01 Sep 2007 08:38:12 -0400
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <K_bCi.721$7P7.506@newssvr19.news.prodigy.net>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>	<1188364909.397692.209170@q4g2000prc.googlegroups.com>	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>	<1188369928.755777.142690@i38g2000prf.googlegroups.com>	<4866bea60708291013g56b3dea9m7abcf5e4e4f6e29c@mail.gmail.com>	<mailman.120.1188423362.28954.python-list@python.org>
	<K_bCi.721$7P7.506@newssvr19.news.prodigy.net>
Message-ID: <46D95D34.9010906@holdenweb.com>

Bryan Olson wrote:
> Steve Holden wrote:
> [...]
>> If I can blow my own trumpet briefly, two customers (each using over 25 
>> kLOC I have delivered over the years) ran for two years while I was away 
>> in the UK without having to make a single support call. One of the 
>> systems was actually locked in a cupboard all that time (though I have 
>> since advised that client to at least apply OS patches to bring it up to 
>> date).
> 
>> This was achieved by defensive programming, understanding the user 
>> requirements and just generally knowing what I was doing.
> 
> On the one hand, nice work. Made your customers happy and kept
> them happy. Can't argue with success. On the other hand, 25K lines
> is tiny by software engineering standards. If a support call would
> have to go to you, then the project must be small. Software
> engineering is only a little about an engineer knowing or not
> knowing what he or she is doing; the bigger problem is that
> hundreds or thousand of engineers cannot possibly all know what
> all the others are doing.
> 
I agree that programming-in-the-large brings with it problems that 
aren't experienced in smaller scale projects such as the ones I mentioned.

> I work on large and complex systems. If I screw up -- O.K., face
> facts: *when* I screw up -- the chance of the issue being assigned
> to me is small. Other engineers will own the problems I cause,
> while I work on defects in code I've never touched. I wish I could
> own all my own bugs, but that's not how large and complex systems
> work. Root-cause analysis is the hard part. By the time we know
> what went wrong, 99.99% of the work is done.
> 
This is the kind of realism I like to see in engineering. I am always 
suspicious when any method is promoted as capable of reducing the error 
rate to zero.
> 
> Design-by-contract (or programming-by-contract) shines in large
> and complex projects, though it is not a radical new idea in
> software engineering. We pretty much generally agree that we want
> strong interfaces to encapsulate implementation complexity.
> That's what design-by-contract is really about.
> 
> There is no strong case for adding new features to Python
> specifically for design-by-contract. The language is flexible
> enough to support optionally-executed pre-condition and
> post-condition checks, without any extension. The good and bad
> features of Python for realizing reliable abstraction are set
> and unlikely to change. Python's consistency and flexibility
> are laudable, while duck-typing is a convenience that will
> always make it less reliable than more type-strict languages.
> 
Python's dynamic nature certainly makes it more difficult to reason 
about programs in any formal sense. I've always thought of it as a 
pragmatist's language, and we need to be pragmatic about the downside as 
well as the upside.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------


From ed at leafe.com  Wed Sep 12 19:55:11 2007
From: ed at leafe.com (Ed Leafe)
Date: Wed, 12 Sep 2007 19:55:11 -0400
Subject: Python Database Apps
In-Reply-To: <1189608814.932322.301950@22g2000hsm.googlegroups.com>
References: <1189479130.905136.196820@r34g2000hsd.googlegroups.com>
	<mailman.387.1189521302.2658.python-list@python.org>
	<1189536987.259907.68650@e34g2000pro.googlegroups.com>
	<mailman.438.1189600804.2658.python-list@python.org>
	<1189608814.932322.301950@22g2000hsm.googlegroups.com>
Message-ID: <15503997-EB3C-4A1E-A27A-ED48F09F505E@leafe.com>

On Sep 12, 2007, at 10:53 AM, darien.watkins at gmail.com wrote:

> Thanks for ideas Ed.  I am checking out dabo now.  I do have a few
> questions about it.  Packaging.  Is it easy to package into a quick
> install for windows.  The users are going to want to get too in
> depth.

	py2exe is your friend here. I know several developers who have used  
this to distribute Dabo apps, so we could certainly help you get your  
setup.py working.

> Second, data sources.  When I'm adding a data source to the
> window in class designer, it always picks up the one I created (which
> incidentally was a sample, my form for connection manager isn't
> working at the moment.)  My idea is to have the the local sqlite
> database as the only viewable data source, and the server side only
> for syncing.  So they logon, sync up, sync down, and view.  I'm
> worried about having to get them to install python, dabo, and the app.

	The users would never see any of the Class Designer, connection  
editor, or any of the other development tools. I would imagine that  
you would need to code the sync parts by getting the current changed  
data from the local SQLite database, creating a connection to the  
server DB, doing the insert/update as needed, grabbing the latest  
from the server, disconnecting from the server, and then updating the  
local data. The user would probably need to do nothing more than  
click a button to start running your code.

	As far as what the user must install, that's what will happen with  
any Python solution. py2exe takes care of all of that, bundling  
Python, Dabo, your database modules, and any other dependencies into  
a single .exe file. You can then use something like Inno Setup to  
create a basic Installer that will look and work like any other  
Windows application installer.

-- Ed Leafe
-- http://leafe.com
-- http://dabodev.com




From paul.hankin at gmail.com  Wed Sep 19 12:04:37 2007
From: paul.hankin at gmail.com (paulhankin)
Date: Wed, 19 Sep 2007 16:04:37 -0000
Subject: Quick shallow-copy idiom
In-Reply-To: <fcqr9s$c4b$2@lust.ihug.co.nz>
References: <fcqr9s$c4b$2@lust.ihug.co.nz>
Message-ID: <1190217877.723092.117630@o80g2000hse.googlegroups.com>

On Sep 19, 10:48 am, Lawrence D'Oliveiro <l... at geek-
central.gen.new_zealand> wrote:
> y = type(x)(x)

Nice trick, but is it better than the explicit:
 y = copy.copy(x)

(I think not, because copy.copy works for example, on classes
which take more than one argument to their constructor).

--
Paul Hankin



From arkanes at gmail.com  Wed Sep 12 11:20:11 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 12 Sep 2007 10:20:11 -0500
Subject: Is the wxPython list down?
In-Reply-To: <1189603681.292154.186620@o80g2000hse.googlegroups.com>
References: <1189602607.803546.180320@w3g2000hsg.googlegroups.com>
	<1189603681.292154.186620@o80g2000hse.googlegroups.com>
Message-ID: <4866bea60709120820v7f20f3f4k2cb89a2c7377b4e8@mail.gmail.com>

On 9/12/07, Frank Millman <frank at chagford.com> wrote:
> On Sep 12, 3:10 pm, kyoso... at gmail.com wrote:
> > Hi,
> >
> > Does anyone know if the wxPython mailing list is having issues? I
> > subscribe to it and haven't seen anything come through since
> > 09/06/2007. I went to ActiveState's archives and the last message
> > there is from the 7th (http://aspn.activestate.com/ASPN/Mail/Browse/
> > Threaded/wxPython-users).
> >
> > Thanks,
> >
> > Mike
>
> This is from the wxPython home page -
>
> "(8-Sept-2007) Yes, the mail lists are down. There were multiple disk
> failures in RAID5 array of the machine that hosts the mail lists. The
> hardware has been replaced and data is being restored from tape
> backups."
>
> I noticed that cvs seems to be down as well - maybe it was on the same
> server.
>

CVS is down because wx has moved to SVN, which is still up and running
fine. svn.wxwidgets.org.


From grante at visi.com  Sat Sep 29 12:38:49 2007
From: grante at visi.com (Grant Edwards)
Date: Sat, 29 Sep 2007 16:38:49 -0000
Subject: Program inefficiency?
References: <1191079347.192272.240540@22g2000hsm.googlegroups.com>
	<13fss68juscn33@corp.supernews.com>
	<1191080844.248426.316340@g4g2000hsf.googlegroups.com>
Message-ID: <13fsvsp6p743qba@corp.supernews.com>

On 2007-09-29, hall.jeff at gmail.com <hall.jeff at gmail.com> wrote:

> I'm not sure what an shell+sed script is...

http://tldp.org/LDP/Bash-Beginners-Guide/html/sect_05_01.html#sect_05_01_01
http://tldp.org/LDP/Bash-Beginners-Guide/html/chap_05.html
http://www.grymoire.com/Unix/Sed.html

http://www.gnu.org/software/bash/
http://en.wikipedia.org/wiki/Bash

Unfortuantely it appears you're using Windows (a partucular bad
choice for this sort of file processing).  You can, however,
get bash and sed for Windows if you wish:

http://www.cygwin.com/

> In case it helps... We started with only 6 loops of replacecycle() but
> had to keep adding progressively more as we found more and more links
> with lots of spaces in them...

I would think with the correct RE's you'd only have to call it
once.

> As we did that, the program's time grew progressively longer
> but the length grew multiplicatively with the added number of
> cycles... This is exactly what I would have expected and it
> leads me to believe that the problem does not lie in the
> replacecycle() def but in the masseditor() def... *shrug*

As the program runs on progressively more files does the
process's memory usage grow without bounds?  Does the machine
start swapping?

-- 
Grant Edwards                   grante             Yow!  I'm pretending that
                                  at               we're all watching PHIL
                               visi.com            SILVERS instead of RICARDO
                                                   MONTALBAN!


From evan at yelp.com  Tue Sep 18 00:42:41 2007
From: evan at yelp.com (Evan Klitzke)
Date: Mon, 17 Sep 2007 21:42:41 -0700
Subject: super() doesn't get superclass
In-Reply-To: <8764281uea.fsf@benfinney.id.au>
References: <8764281uea.fsf@benfinney.id.au>
Message-ID: <1190090561.5759.8.camel@thinkpad>

On Tue, 2007-09-18 at 14:15 +1000, Ben Finney wrote:
> Howdy all,
> 
> After banging my head against super() trying to reliably get
> attributes of a superclass, I gained a little enlightenment when this
> turned up in a search:
> 
>     "Python's Super is nifty, but you can't use it
>     (Previously: Python's Super Considered Harmful)"
>     <URL:http://fuhm.org/super-harmful/>
> 
> An early paragraph stood out that made my current problems clear:
> 
>     One big problem with 'super' is that it sounds like it will cause
>     the superclass's copy of the method to be called. This is simply
>     not the case, it causes the next method in the MRO to be called.
> 
> Oh. The author's right, I got that mistaken impression too. Obviously,
> then, I must have misread the documentation of 'super'. I went back to
> double-check, and was appalled to find:
> 
>     super(type[, object-or-type])
>     Return the superclass of type. [...]
> 
>     <URL:http://docs.python.org/lib/built-in-funcs.html#l2h-72>
> 
> Why does the documentation of 'super' say that it returns the
> superclass when *that's not true*? It doesn't return the superclass,
> it returns the next class in the MRO, whether that's a superclass or
> not.

The next class in the MRO _is_ a superclass. Maybe not the way you've
defined it in your own code, but certainly of the new class you created
with MI.

> Actually, even that's not true. The error message "AttributeError:
> 'super' object has no attribute 'bazfunc'" makes it clear that 'super'
> actually returns not the superclass, but a 'super' object, whatever
> that's supposed to be.

No, super really does return a class. What makes you think that super
returns a special sort of object?

> After reading the rest of the article, I'm amazed that 'super' as
> currently implemented is in Python at all. I agree with the author
> that it's useless unless *everyone* uses it for *everything*, and even
> then it's pretty limited.

I don't see what the problem is. If you don't use super, then you can
break the inheritance chain, but this is no different than calling
superclass methods by passing in self (i.e. the old-style way of doing
it), and in fact using super is far more flexible. There's no way to
magically know when to call the superclass' method, and even if you knew
when, there's no way to magically know when it needs to be called.

If you're using multiple inheritance, and you're _not_ using super
everywhere, then your code is broken anyway. Use super correctly in your
own code, and you don't need to worry about other people using it
incorrectly.

-- 
Evan Klitzke <evan at yelp.com>



From duncan.booth at invalid.invalid  Sun Sep  9 06:06:59 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 9 Sep 2007 10:06:59 GMT
Subject: Python syntax wart
References: <fbvvil$7dj$1@lust.ihug.co.nz> <13e7ddd9hgibae6@corp.supernews.com>
Message-ID: <Xns99A66AF7C3714duncanbooth@127.0.0.1>

Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> wrote:

> On Sun, 09 Sep 2007 17:16:05 +1200, Lawrence D'Oliveiro wrote:
> 
>> The one thing I don't like about Python syntax is using backslashes to
>> continue lines.
> 
> Then don't use them. Put everything in one long line.
> 
> Or do something like this. Instead of
> 
> for Link in GetEachRecord("lots", "and", "lots", "of", "arguments"):
> 
> you can do this:
> 
> args = ("lots", "and", "lots", "of", "arguments")
> for Link in GetEachRecord(*args):
> 

Or even just:

records = GetEachRecord("lots", "and", "lots", "of", "arguments")
for link in records:
   ...



From spammehere at gmx.com  Thu Sep 20 15:28:36 2007
From: spammehere at gmx.com (Michael v. Fondern)
Date: Thu, 20 Sep 2007 21:28:36 +0200
Subject: An Editor that Skips to the End of a Def
In-Reply-To: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
Message-ID: <46f2c9c0$0$7365$a9611f8e@news.cityweb.de>

W. Watson:
> Is there an editor that allows one to position to put the cursor and 
> then by pushing some button goes to the end of the def?

Eclipse, together with the pydev plugin.

(Ctrl-Shift-Down)

Greetings

- Michael -


From ldo at geek-central.gen.new_zealand  Sat Sep  1 02:56:59 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 01 Sep 2007 18:56:59 +1200
Subject: ANN: SCF released GPL
References: <2qnAi.21495$eY.19028@newssvr13.news.prodigy.net>
	<7x3ay5d1mn.fsf@ruckus.brouhaha.com>
Message-ID: <fbb2b6$hfv$2@lust.ihug.co.nz>

In message <7x3ay5d1mn.fsf at ruckus.brouhaha.com>, Paul Rubin wrote:

> hg <hg at nospam.org> writes:
>
>> I am looking for a free subversion server resource to put the code
>> ... if you know of any.
> 
> Does it have to be SVN?  I think Savannah and Sourceforge both still
> use CVS.

Why would you want to use CVS rather than Subversion?


From steve at REMOVE-THIS-cybersource.com.au  Sat Sep  8 05:44:24 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sat, 08 Sep 2007 09:44:24 -0000
Subject: unexpected behavior: did i create a pointer?
References: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>
	<46e11dfe$0$4517$9b4e6d93@newsspool3.arcor-online.net>
	<pan.2007.09.07.10.40.46@REMOVE.THIS.cybersource.com.au>
	<fbrdsm$5f3$01$1@news.t-online.com>
	<13e2jdobu2kqkf1@corp.supernews.com>
	<fbtl7i$um3$02$2@news.t-online.com>
Message-ID: <13e4rno5qal6h4b@corp.supernews.com>

On Sat, 08 Sep 2007 10:07:14 +0200, Peter Otten wrote:

> Am Fri, 07 Sep 2007 13:10:16 +0000 schrieb Grant Edwards:
> 
>> On 2007-09-07, Peter Otten <__peter__ at web.de> wrote:
>>> Am Fri, 07 Sep 2007 10:40:47 +0000 schrieb Steven D'Aprano:
>>>
>>>> Python doesn't have any pointers.
>>>
>>> Thinking of python variables or "names" as pointers should get you a
>>> long way when trying to understand python's behaviour.
>> 
>> But thinking of them as names bound to objects will get you further
>> (and get you there faster). ;)
> 
> Understanding a new system in terms of one I already know works for me.
> When terminology and the system it describes make a perfect fit that is
> a strong indication that you have reached a dead end.

Ways that Python objects are not like C pointers:

(1) You don't have to manage memory yourself.

(2) You don't have typecasts. You can't change the type of the object you 
point to.

(3) Python makes no promises about the memory location of objects.

(4) No pointer arithmetic.

(5) No pointers to pointers, and for old-school Mac programmers, no 
handles.

(6) No dangling pointers. Ever.

(7) There's no null pointer. None is an object, just like everything else.

(8) You can't crash your computer by writing the wrong thing to the wrong 
pointer. You're unlikely even to crash your Python session.



Ways that Python objects are like pointers:

(1) ... um... 

Oh yeah, if you bind the _same_ object to two different names, _and_ the 
object is mutable (but not if it is immutable), mutating the object via 
one name will have the same effect on the object -- the same object, 
naturally -- bound to the other name.

You know, maybe because I came to Python with no C experience, I never 
had trouble with the "unexpected behaviour" that so confused the original 
poster. It's just obvious.


-- 
Steven.


From esosman at ieee-dot-org.invalid  Thu Sep 27 22:43:44 2007
From: esosman at ieee-dot-org.invalid (Eric Sosman)
Date: Thu, 27 Sep 2007 22:43:44 -0400
Subject: Traveling Europe
In-Reply-To: <1190907679.164542.149190@19g2000hsx.googlegroups.com>
References: <1190907679.164542.149190@19g2000hsx.googlegroups.com>
Message-ID: <a7OdnYj7itv392HbnZ2dnUVZ_sDinZ2d@comcast.com>

freeaircon at gmail.com wrote:
> World's most popular traveling destinations
> 
> http://...

     "Nobody goes there any more; it's too crowded." -- LPB

-- 
Eric Sosman
esosman at ieee-dot-org.invalid


From mensanator at aol.com  Sun Sep 30 22:35:44 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: Sun, 30 Sep 2007 19:35:44 -0700
Subject: Using fractions instead of floats
In-Reply-To: <1191202509.853059.222530@k79g2000hse.googlegroups.com>
References: <1191202509.853059.222530@k79g2000hse.googlegroups.com>
Message-ID: <1191206144.339867.134820@d55g2000hsg.googlegroups.com>

On Sep 30, 8:35?pm, andresj <andres.j.... at gmail.com> wrote:
> I was doing some programming in Python, and the idea came to my mind:
> using fractions instead of floats when doing 2/5.
>
> The problem arises when you try to represent some number, like 0.4 in
> a float. It will tell you that it's equal to 0.40000000000000002.
> "This is easy to fix", you may say. "You just use the decimal.Decimal
> class!". Well, firsly, there would be an excess of typing I would need
> to do to calculate 0.4+0.6:
>
> from decimal import Decimal
> print Decimal("0.4")+Decimal("0.6")
>
> Secondly, what happens if I need to sum 1/3 and 0.4? I could use
> Decimal to represent 0.4 precisely, but what about 1/3? Sure, I could
> use _another_ class which works in a base (binary, decimal, octal,
> hexadecimal) in which 1/3 can be represented exactly... Not to mention
> the problem of operating with those two different classes...
>
> So the solution I think is using a fraction type/class, similar to the
> one found in Common Lisp. If you have used CLisp before, you only need
> to type:
> (+ 1/3 6/10)
> to get the exact result. (Yes, I also hate the (operator arg1 arg2)
> syntax, but it's just an example). I would like to have something
> similar in Python, in which dividing two numbers gives you a fraction,
> instead of an integer (python 2.x) or a float (decided for python
> 3.x).
>
> an implementation could be like this:
> class frac(object):     # PS: This (object) thing will be removed in
> python 3.0, right?
>     def __init__(self, numerator, denominator):
>         pass
>     def __add__(self, other):
>         pass
>     #...
>
> (I have an implementation of the frac class done (this meaning, it
> works for me), and although it's pretty dirty, I'd be happy to post it
> here if you want it.)
>
> My idea, in summary would be that this python shell session is true:
>
> >>> 5/2
> 2 1/2
> >>> f = 5/2
> >>> f.__class__
> <type 'frac'>
> >>> # or <class 'frac'>
> >>> (0.6).__class__     # Treat decimal literals as fractions, so that...
> <type 'frac'>
> >>> 1/3+0.6
> 14/15
> >>> # That was easy. ;)
>
> I would like to get some feedback on this idea. Has this been posted
> before? If so, was it rejected? and for what?
> Also, I would like to know if you have improvements on the initial
> design, and if it would be appropiate to send it as a PEP.

The gmpy module has unlimited precision rationals.
Works pretty good, too.



From eduardo.padoan at gmail.com  Sun Sep  2 20:35:26 2007
From: eduardo.padoan at gmail.com (Eduardo O. Padoan)
Date: Sun, 2 Sep 2007 21:35:26 -0300
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
In-Reply-To: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
Message-ID: <dea92f560709021735l2c72d53ew94410fcb33b9b50b@mail.gmail.com>

On 9/2/07, llothar <llothar at web.de> wrote:
> I'm afraid that the GIL is killing the usefullness of python for some
> types of applications now where 4,8 oder 64 threads on a chip are here
> or comming soon.
>
> What is the status about that for the future of python?
>
> I know that at the moment allmost nobody in the scripting world has
> solved this problem, but it bites and it bites hard. Only groovy as a
> Java Plugin has support but i never tried it. Writing an interpreter
> that does MT this seems to be extremely difficult to do it right, with
> lots of advanced stuff like CAS and lock free programming.
>
> Even Smalltalk and Common Lisp didn't get it until know (with the
> exception of certain experiments).


No. http://www.artima.com/weblogs/viewpost.jsp?thread=211430

-- 
http://www.advogato.org/person/eopadoan/
Bookmarks: http://del.icio.us/edcrypt


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sat Sep 22 05:16:09 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sat, 22 Sep 2007 11:16:09 +0200
Subject: Writing Object Data to Disk
References: <mailman.914.1190444082.2658.python-list@python.org>
Message-ID: <5lk4qnF8iosiU1@mid.individual.net>

Amit Kumar Saha wrote:
> I have a Python class with data members, say:
> 
> class Foo:
>     def __init__(self):
> 
>         self.a=7
>         self.b[]={1,3,4}
                ^^
This is invalid syntax.

> I would like to know if "Pickling" the class object is the only
> way of writing it to disk for persistent storage. 

It isn't. Every means of serialisation works, but pickling is
especially convenient if you only use Python.

> Also, do we have a concept similar to "array of objects" in
> Python? 

You can put all objects in lists, be it a string, an integer or some
complex class instance. 

> The number of objects is only known at "run-time".

class and function definitions also happen at runtime. I suggest you
worked through the Python tutorial to get a deeper insight in
Python's concepts.

http://docs.python.org/tut/

Regards,


Bj?rn

-- 
BOFH excuse #89:

Electromagnetic energy loss



From steven.bethard at gmail.com  Thu Sep  6 12:19:14 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 06 Sep 2007 10:19:14 -0600
Subject: reload(sys)
In-Reply-To: <1189094496.120836.61870@o80g2000hse.googlegroups.com>
References: <1188521143.421431.119100@l22g2000prc.googlegroups.com>
	<JK2dnSgydPkg8ErbnZ2dnUVZ_u3inZ2d@comcast.com>
	<1188564816.430863.219560@w3g2000hsg.googlegroups.com>
	<f8GdnZ-6HbH-1kXbnZ2dnUVZ_s3inZ2d@comcast.com>
	<1188662049.337034.58220@w3g2000hsg.googlegroups.com>
	<b4GdnYMUSPu56UbbnZ2dnUVZ_u2mnZ2d@comcast.com>
	<1189077209.646830.111990@19g2000hsx.googlegroups.com>
	<1189094496.120836.61870@o80g2000hse.googlegroups.com>
Message-ID: <5-WdnUzNZuwZtX3bnZ2dnUVZ_vOlnZ2d@comcast.com>

S?nmez Kartal wrote:
> I was using the XMLBuilder(xmlbuilder.py). I'm writing XML files as
> "f.write(str(xml))". At execution of that line, it gives error with
> description, configure your default encoding...
>
[and later]
> 
> http://rafb.net/p/RfaF8215.html
>
> products in the code is a list of dictionaries which are returned by
> makeProduct function.
>
> I'm not typing or pasting those characters into my script. So,
> declaring an encoding didn't make it. :-( But, your code excerpt
> runned well.

Gabriel Genellina wrote:
> You should ensure that arguments to makeProduct are either:
> - unicode objects
> - ASCII strings
> 
> If you got them from some other place, decode the strings as soon as
> possible into unicode. Read <http://www.amk.ca/python/howto/unicode>
> to understand what's happening

To further illustrate Gabriel's point, here is some code where I read in 
some UTF8 text from a file.  If you properly decode that text from UTF8, 
you don't get any errors.  If you forget to decode that text, you'll get 
exactly the "default encoding" error you were getting before:

     >>> f = open('temp.txt', 'w')
     >>> f.write(u'? and ?'.encode('utf8'))
     >>> f.close()
     >>> non_decoded_text = open('temp.txt').read()
     >>> decoded_text = non_decoded_text.decode('utf8')
     >>> import xmlbuilder
     >>> builder = xmlbuilder.XMLBuilder()
     >>> builder.foo = dict(bar=non_decoded_text)
     >>> str(builder)
     Decoding Error: You must configure default encoding
     >>> builder = xmlbuilder.XMLBuilder()
     >>> builder.foo = dict(bar=decoded_text)
     >>> str(builder)
     '<?xml version="1.0" encoding="utf-8"?><foo><bar>\xc2\xae and
     \xc2\x99</bar></foo>'

Note that I didn't have to do anything with the default encoding. I 
simply had to decode the text file with the appropriate codec. So, 
looking at your code, I'm guessing that you need to figure out where 
you're reading in the "name", "url" and "image" values, and make sure 
you're properly decoding that text.

STeVe

P.S. If you can find somewhere to file a bug report for XMLBuilder, you 
really should.  The error instructing you to configure the default 
encoding is really just wrong.


From linuxprog at gmail.com  Mon Sep 24 09:42:57 2007
From: linuxprog at gmail.com (linuxprog)
Date: Mon, 24 Sep 2007 13:42:57 +0000
Subject: SOAPpy Error
In-Reply-To: <46F7867F.3090607@gmail.com>
References: <46F7867F.3090607@gmail.com>
Message-ID: <46F7BEE1.300@gmail.com>

linuxprog a ?crit :
> hi all
>
> i'm building a webservice client with soappy
>
> when i send some informations it's returns an error
> here is the informations that generates the error
>    var = SOAPpy.structType()
>    var._addItem("code", u"XysZjd")
>    var._addItem("value", 1)
> when i send the var variable SOAPpy prints this
>
>  File "C:\Python23\lib\site-packages\SOAPpy\Client.py", line 473, in 
> __call__
>    return self.__r_call(*args, **kw)
>  File "C:\Python23\lib\site-packages\SOAPpy\Client.py", line 495, in 
> __r_call
>    self.__hd, self.__ma)
>  File "C:\Python23\lib\site-packages\SOAPpy\Client.py", line 366, in 
> __call
>    config = self.config)
>  File "C:\Python23\lib\site-packages\SOAPpy\Client.py", line 228, in call
>    data = r.getfile().read()
> AttributeError: 'NoneType' object has no attribute 'read'
>
> when i have activate debug , the debug mode shows :
> code :  -1
> msg : headers : None
>
> it should prints some thing like this if all goes well :
> code :  200
> msg :  OK
> headers : Date: Mon, 24 Sep 2007 09:08:45 GMT
> Server: Apache/2.2.3 (Debian) PHP/5.2.0-8+etch7
> X-Powered-By: PHP/5.2.0-8+etch7
> Content-Length: 2116
> Connection: close
> Content-Type: text/xml; charset=utf-8
>
> wha's wrong ?
>
> Thanks
>
still no answer !?


From pavlovevidence at gmail.com  Thu Sep 13 15:47:27 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Thu, 13 Sep 2007 12:47:27 -0700
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <13eigagsuk74l55@corp.supernews.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189666095.727426.135170@o80g2000hse.googlegroups.com>
	<1189685403.306218.13270@22g2000hsm.googlegroups.com>
	<13eigagsuk74l55@corp.supernews.com>
Message-ID: <1189712847.666826.230680@50g2000hsm.googlegroups.com>

On Sep 13, 9:55 am, Steven D'Aprano <st... at REMOVE-THIS-
cybersource.com.au> wrote:
> On Thu, 13 Sep 2007 12:10:03 +0000, timothy.soehn... at gmail.com wrote:
> > Why not use '_' as the self variable.  It is minimal and achieves close
> > to '.var', as '_.var' isn't that different.  I know its a little
> > perl-esque, but its not a bad convention if you are aiming to up
> > readability of your code.
>
> I think the definitions of "up" or "readability" you are using are very
> different from mine. To me, to up something means to increase it, and
> readability means the ease of comprehension when reading something. You
> seem to be using the opposite definition for one or the other.


He's not.  People who've never done a lot of numerical programming
might have a hard time understanding this, but what is considered
readable for "ordinary" programming is just does not apply when
reading and writing pages of mathematical formulae.

Trying to apply the "ordinary" standards of readability to numerical
programming is like trying to write a mathematical treatise in English
prose only, with no mathematical notation.  It would be totally
unreadable, almost as unreadable as a sociology textbook.  In the same
way, many pages of formulas would be unreadable using "ordinary"
standards of readability (though not quite to the same degree).

The most readable numerical code looks as much like the printed
equations as possible.  "self." is a distraction; it's not in the
original formula; it's boilerplate.  It takes away from the
readability of the code.  Assuming that you can't get rid of the
attribute syntax, minimizing the visual footprint of it will increase
readability.  So "_." is more readable than "self." because it changes
the appearance of the printed formula a lot less.

Having said all that, I would not use "_.", ever.  I probably wouldn't
even use Python if I had lots of numerical formulas to implement; I'd
wrap up some C or Fortran code.  If I did use Python I'd avoid
implementing lots of formulas in class methods.  If I had do this
stuff in a method, and I only had a few formulas, I'd tolerate "self."
for the sake of conformance.  If I had many fomulas, I would make
local copies at the top.



Carl Banks



From fredrik at pythonware.com  Wed Sep 26 03:24:09 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 26 Sep 2007 09:24:09 +0200
Subject: Inserting an element into existing xml file
In-Reply-To: <1190716205.955284.220810@n39g2000hsh.googlegroups.com>
References: <1190712485.761290.136570@50g2000hsm.googlegroups.com>	<46F8E0E2.3050602@web.de>
	<1190716205.955284.220810@n39g2000hsh.googlegroups.com>
Message-ID: <fdd1ep$mam$1@sea.gmane.org>

Anand wrote:

> I'm Afraid to say, I can't use lxml or elementTree as it requires many
> legal approvals and there is high chances of not getting it through.
> So Do you have any other method / idea just by using plain 2.4 to
> accomplish the task

Are you allowed to use code samples you found on the net?

     http://svn.effbot.org/public/elementtree/

(if not, are you even allowed to ask for help? ;-)

ElementTree (aka xml.etree) is pure Python, and you only need the 
ElementTree.py module to do what you want, so I guess you could
always pretend you wrote it yourself...

</F>



From orsenthil at gmail.com  Sun Sep  9 13:57:37 2007
From: orsenthil at gmail.com (O.R.Senthil Kumaran)
Date: Sun, 9 Sep 2007 23:27:37 +0530
Subject: python 2.5 problems
In-Reply-To: <3nVEi.98555$Vk6.66626@newsfe07.phx>
References: <3nVEi.98555$Vk6.66626@newsfe07.phx>
Message-ID: <20070909175737.GA4050@gmail.com>


> Finally deleted 2.2 and loaded 2.5 (see below), using 

Dont delete. Uninstall python 2.2 and additional modules if you have installed them.

> So is there something not stable about ver 2.5 on XP ?

Nothing like that. Python 2.5 works perfectly fine on Windows XP.
Download from www.python.org and if you face the same problem, try the python distribution available from ActiveState. If both of them give the same problem, good chances that the problem is with your OS.

-- 
O.R.Senthil Kumaran
http://uthcode.sarovar.org


From f.guerrieri at gmail.com  Sun Sep  2 11:29:28 2007
From: f.guerrieri at gmail.com (Francesco Guerrieri)
Date: Sun, 2 Sep 2007 17:29:28 +0200
Subject: list index()
In-Reply-To: <1188742647.266967.33720@w3g2000hsg.googlegroups.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
	<slrnfde2ei.1ek.horpner@FIAD06.norwich.edu>
	<1188498199.557521.31700@z24g2000prh.googlegroups.com>
	<1188742647.266967.33720@w3g2000hsg.googlegroups.com>
Message-ID: <79b79e730709020829p594f22e0qce0ee33c0d707503@mail.gmail.com>

On 9/2/07, Zentrader <zentraders at gmail.com> wrote:
>
> On Aug 30, 11:23 am, zzbba... at aol.com wrote:
> > Neil, Steve,
> >
> > Thanks for the responses on sets. I have not used them before and was
> > not even aware Python had them. I will try them out.
>
> And if there weren't sets you would still not use find or index but a
> brute force method or dictionaries
> for each in dir_a_list :
>    if each not in dir_b_list :
>       print each, "not in dir_b"
>


This is O(N_a * N_b)... unless the list are always small, it's definitely
better (if one is decided not to use sets) to use dictionaries :-)


bye
francesco
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From tec at knology.net  Mon Sep 10 12:03:52 2007
From: tec at knology.net (Tim)
Date: Mon, 10 Sep 2007 09:03:52 -0700
Subject: shared memory pointer
In-Reply-To: <mailman.325.1189437043.2658.python-list@python.org>
References: <1189436265.841415.234050@w3g2000hsg.googlegroups.com>
	<mailman.325.1189437043.2658.python-list@python.org>
Message-ID: <1189440232.421738.283100@k79g2000hse.googlegroups.com>

On Sep 10, 10:11 am, Tim Golden <m... at timgolden.me.uk> wrote:
> Tim wrote:
> > Hello Everyone,
>
> > I am getting shared memory in python using the following.
>
> > szName = c_char_p(name)
> > hMapObject = windll.kernel32.CreateFileMappingA(INVALID_HANDLE_VALUE,
> >             None, PAGE_READONLY, 0, TABLE_SHMEMSIZE, szName)
> > if (hMapObject == 0):
> >             print "OpenKey: Could not open name file mapping object"
> >             raise WinError()
>
> > self.pData = windll.kernel32.MapViewOfFile(hMapObject,
> >        FILE_MAP_ALL_ACCESS, 0, 0, TABLE_SHMEMSIZE)
>
> Without answering your question directly, why not use
> the stdlib mmap module, which does exactly this for
> you behind the scenes?
>
> Docs -http://docs.python.org/lib/module-mmap.html
> Example -http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/413807
>
> TJG

I reviewed the mmap function and I have a question. In the example
code below, what is the connection between the data in shared memory
and the mmap function. The fileno is zero. Why is it zero? The size
makes sense because there is 256 bytes in shared memory. The tag is
MyFileMappingObject. This tag does not have anything in common with
the shared memory. How can mmap point to any data in shared memory?
There is no coorelation.


pBuf = windll.kernel32.MapViewOfFile(hMapObject, FILE_MAP_ALL_ACCESS,
0, 0, SHMEMSIZE)
if (pBuf == 0):
    print "Could not map view of file"
    raise WinError()
else:
    memcpy = cdll.msvcrt.memcpy
    memcpy(pBuf, szMsg, len(szMsg))

shmem = mmap.mmap(0, 256, "MyFileMappingObject", mmap.ACCESS_WRITE)
shmem.write("Message from Python process")





From http  Sun Sep  2 13:05:27 2007
From: http (Paul Rubin)
Date: 02 Sep 2007 10:05:27 -0700
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
	<1188735642.391419.103650@19g2000hsx.googlegroups.com>
	<1188740716.423349.304370@y42g2000hsy.googlegroups.com>
	<1188742231.470668.29910@g4g2000hsf.googlegroups.com>
	<1i3t4ha.1r0xx7414w0taxN%aleax@mac.com>
Message-ID: <7xfy1x0zhk.fsf@ruckus.brouhaha.com>

aleax at mac.com (Alex Martelli) writes:
> ...which suggests that creating an xrange object is _cheaper_ than
> indexing a list...

Why not re-use the xrange instead of keeping a list around?

    Python 2.4.4 (#1, Oct 23 2006, 13:58:00) 
    >>> a = xrange(3)
    >>> print list(a)
    [0, 1, 2]
    >>> print list(a)
    [0, 1, 2]


From steve at holdenweb.com  Fri Sep 14 01:48:41 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 14 Sep 2007 01:48:41 -0400
Subject: Just bought Python in a Nutshell
In-Reply-To: <eb79828c0709132112o5a3e7137n5ae5cd55e3e0b839@mail.gmail.com>
References: <eb79828c0709132112o5a3e7137n5ae5cd55e3e0b839@mail.gmail.com>
Message-ID: <fcd7bq$nrh$1@sea.gmane.org>

Lamonte Harris wrote:
> http://www.powells.com/biblio/63-9780596001889-7  Used, has anyone read 
> this book.  Any additional information that you like,dislike about this 
> book? [I like having real books and stead of ebooks because its better 
> on the eyes.]  Should be her 2morrow Afternoon :), few hours before I 
> get home great deal :D.

You have just purchased the most comprehensive language reference and 
instructional manual currently available, written by an acknowledged 
expert whose pedantry ensures an excruciating level of correctness in 
the text. It's a well-written book, and contains enough information that 
almost every Python programmer will find it a useful addition to his or 
her bookshelf.

You will enjoy it whether you choose to read from the beginning or just 
dip in.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From gherron at islandtraining.com  Thu Sep  6 11:50:20 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 06 Sep 2007 08:50:20 -0700
Subject: Getting original working directory
In-Reply-To: <1520.1657-1856-1993609010-1189091974@seznam.cz>
References: <1520.1657-1856-1993609010-1189091974@seznam.cz>
Message-ID: <46E021BC.7050607@islandtraining.com>

rave247 rave247 wrote:
> Hi,
>
> I' am unable to solve this problem. I've got python program, it is installed in standard location. I run this program from some location X (note that I just type relative "myscript", leaving operating system to look up script itself using PATH variable) and this program somewhere in the code calls os.chdir() to change it is current working directory and I would need in python code to get the *original* directory location *after* os.chdir() is performed. This means the location X from which script was performed - it is the location I am in after script is finished.
>
> Thanks for any help
>   
Not quite sure what you want, but one of these should work for you:

sys.argv[0] gives the path of the script begin run.  Strip off the
filename part to get its directory.

os.getcwd() returns the current working directory.  Call this before you
change things with os.chdir().

Gary Herron



From steve at REMOVE-THIS-cybersource.com.au  Wed Sep 19 11:51:57 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Wed, 19 Sep 2007 15:51:57 -0000
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<dea92f560709021735l2c72d53ew94410fcb33b9b50b@mail.gmail.com>
	<mailman.303.1188779927.28954.python-list@python.org>
	<1190164166.378500.155990@o80g2000hse.googlegroups.com>
Message-ID: <13f2hctdoob87e5@corp.supernews.com>

On Tue, 18 Sep 2007 18:09:26 -0700, TheFlyingDutchman wrote:

> How much faster/slower would Greg Stein's code be on today's processors
> versus CPython running on the processors of the late 1990's? 

I think a better question is, how much faster/slower would Stein's code 
be on today's processors, versus CPython being hand-simulated in a giant 
virtual machine made of clockwork?



-- 
Steven.


From seannakasone at yahoo.com  Fri Sep 14 06:21:42 2007
From: seannakasone at yahoo.com (Sean Nakasone)
Date: Fri, 14 Sep 2007 00:21:42 -1000
Subject: smtp debugging methods
Message-ID: <Pine.WNT.4.64.0709140015140.888@frna_yncgbc>

I'm having trouble with sending smtp mail.  It's hanging after the 
smtplib.SMTP() line. It doesn't works from home but not from work.  What's 
the best way to debug this?

# Here's my script
import smtplib
msg = "Subject: Hello\n\nThis is the\nbody of the message."
server = smtplib.SMTP("smtp.gmail.com",465)
   # "Connection refused" normally means there is no server listening for
   # connections on the specified IP/port-combination.
   # use netstat -an to view connections.
server.set_debuglevel(1)
server.ehlo()
server.starttls()
server.ehlo()
# !!! set the password
server.login("myuser", "mypass")
server.sendmail("...

# Here's the error
>>> server = smtplib.SMTP("smtp.gmail.com",465)
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "/usr/lib/python2.4/smtplib.py", line 241, in __init__
     (code, msg) = self.connect(host, port)
   File "/usr/lib/python2.4/smtplib.py", line 304, in connect
     (code, msg) = self.getreply()
   File "/usr/lib/python2.4/smtplib.py", line 345, in getreply
     line = self.file.readline()
   File "/usr/lib/python2.4/socket.py", line 340, in readline
     data = self._sock.recv(self._rbufsize)
socket.error: (113, 'Software caused connection abort')


From w_a_x_man at yahoo.com  Sun Sep 30 14:37:51 2007
From: w_a_x_man at yahoo.com (William James)
Date: Sun, 30 Sep 2007 11:37:51 -0700
Subject: Create a string array of all comments in a html file...
In-Reply-To: <1191166775.660477.97840@o80g2000hse.googlegroups.com>
References: <1191166775.660477.97840@o80g2000hse.googlegroups.com>
Message-ID: <1191177471.105525.195000@o80g2000hse.googlegroups.com>

On Sep 30, 10:39 am, sophie_newbie <paulgeele... at gmail.com> wrote:
> Hi, I'm wondering how i'd go about extracting a string array of all
> comments in a HTML file, HTML comments obviously taking the format
> "<!-- Comment text here -->".
>
> I'm fairly stumped on how to do this? Maybe using regular expressions?
>
> Thanks.

E:\Ruby>irb --prompt xmp
"<!-- Comment
here -->And <i>so</i> funny!
<p>It was a dark and stormy night.
</p><!-- Comment <> -->".scan(/<!--.*?-->/m)
    ==>["<!-- Comment\nhere -->", "<!-- Comment <> -->"]



From kay.schluehr at gmx.net  Tue Sep 18 05:13:49 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Tue, 18 Sep 2007 02:13:49 -0700
Subject: can Python be useful as functional?
In-Reply-To: <46ef8895$0$21882$426a34cc@news.free.fr>
References: <1190073045.618869.261290@k79g2000hse.googlegroups.com>
	<46ef8895$0$21882$426a34cc@news.free.fr>
Message-ID: <1190106829.680544.159250@g4g2000hsf.googlegroups.com>

On 18 Sep., 10:13, Bruno Desthuilliers <bruno.
42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> Lorenzo Stella a ?crit :
>
> > Hi all,
> > I haven't experienced functional programming very much, but now I'm
> > trying to learn Haskell and I've learned that: 1) in functional
> > programming LISTS are fundmental;
>
> Not exactly. They are used quite a lot, yes, but that's also the case in
> other paradigms. What's important in functional programming is *functions*.

Functional lists are not quite the same. They are actually recursive
datastructes. In Python you would model them as nested tuples:

t = (a, (b, (c, ...(d, None)))))

These are essentially pairs build from the bottom up using a list
constructor and they have little in common with those mutable list
objects ( arrays, vectors ) being used in Python. You can easily
extend them into n-ary trees and implement mutations on them as forks
where the original strucure is almost preserved. This leads to all
kinds of "functional data structures".

In order to access an element you already need a recursive function
defintion ( unless you just want to examine the head or the tail
only ) and this makes functional programming and "consed" lists a
perfect match.

[...]

> Strictly speaking, a language is functional if it has functions as first
> class objects. Period.

No, not period and not strictly speaking. A language is functional
when its semantics is based on lambda calculus where everything is a
function or a variable bound to a function which can be substituted by
a function. Each functional language, to be usefull, must be augmented
with programming language constructs used from other paradigms or
support unsafe operations to enable proper side effects. This is not a
humpty-dumpty issue where everyone can name his language a functional
programming language just because one can pass functions as first
class citizens around and he says so. Otherwise those languages can
support a few functional programming language idioms such as map,
reduce and filter or comprehensions as in Pythons case.



From carsten at uniqsys.com  Fri Sep  7 21:12:23 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 07 Sep 2007 21:12:23 -0400
Subject: Is a Borg rebellion possible? (a metaclass question)
In-Reply-To: <FeKdnSy4itjqJ3zbnZ2dnUVZ_remnZ2d@comcast.com>
References: <1189168282.665210.260840@19g2000hsx.googlegroups.com>
	<mailman.220.1189171663.2658.python-list@python.org>
	<1189180478.257790.60160@g4g2000hsf.googlegroups.com>
	<mailman.245.1189191618.2658.python-list@python.org>
	<FeKdnSy4itjqJ3zbnZ2dnUVZ_remnZ2d@comcast.com>
Message-ID: <1189213943.3262.11.camel@localhost.localdomain>

On Fri, 2007-09-07 at 14:54 -0600, Steven Bethard wrote:
> Carsten Haese wrote:
> > [slightly convoluted example...]
> 
> I think I would probably write that as::
> [concise example...]
> 
> That is, I don't think there's really a need for __new__ if you're using 
> a metaclass. Just set the instance's __dict__ in the __call__ method of 
> the metaclass.

Good point. I suppose it shows that this is the first metaclass I've
ever written, but it works, and it didn't make my brain explode ;)

-- 
Carsten Haese
http://informixdb.sourceforge.net




From steve at holdenweb.com  Fri Sep 28 16:04:00 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 28 Sep 2007 16:04:00 -0400
Subject: OCBC connection
In-Reply-To: <1191008769.878419.307310@k79g2000hse.googlegroups.com>
References: <mailman.1228.1190992159.2658.python-list@python.org>	<1191000128.112881.111790@r29g2000hsg.googlegroups.com>	<mailman.1241.1191002850.2658.python-list@python.org>
	<1191008769.878419.307310@k79g2000hse.googlegroups.com>
Message-ID: <fdjmng$m58$2@sea.gmane.org>

kyosohma at gmail.com wrote:
[...]
>>
>>  >>> curs = conn.cursor()
>>  >>> import psycopg2 as db
>>  >>> conn = db.connect(database="pycon", user="username",
>>          password="password", host="localhost", port=5432)
>>  >>> curs = conn.cursor()
>>  >>> curs.execute("SELECT orgid, orgname FROM organization")
>>  >>> from pprint import pprint # just for neatness
>>  >>> pprint(curs.fetchall())
>> [(1, 'AB Strakt'),
>>   (79, 'DevIS'),
>>      ...
>>   (113, 'Test Organization'),
>>   (19, 'Holden Web LLC')]
>>  >>>

> Whoops! I almost posted some code using the adodb or the odbc module,
> which is what I would have probably used, but I figured I'd take a
> look and see if there was a postgres module available. I'm not seeing
> any basic differences between your code and the code I linked to
> though...except that if I ran your first line of code, I would get an
> exception as "conn" hasn't been defined yet.
> 
> Whatever. I apologize for being misleading(?)
> 
I screwed up anyway - the first line shouldn't have been included.

But perhaps Sean could enlighten us as to whether ODBC is really a 
requirement, or simply the first solution that he thought of. I don't 
know why one would *require* ODBC.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From ivonet at gmail.com  Fri Sep 21 15:14:10 2007
From: ivonet at gmail.com (Ivo)
Date: Fri, 21 Sep 2007 21:14:10 +0200
Subject: Remote Command a Python Script
In-Reply-To: <1190384953.774277.249350@k79g2000hse.googlegroups.com>
References: <1190384953.774277.249350@k79g2000hse.googlegroups.com>
Message-ID: <46f4171e$0$3060$e4fe514c@dreader31.news.xs4all.nl>

Ulysse wrote:
> Hello,
> 
> I've installed Python 2.5 on my WRT54G Linksys Router. On this router
> a script is executed. This script write a little Pickle database in
> the router memory.
> 
> I would like to write another Python script which will be able to :
> 
> 1. Stop and start the remote script from my Windows Computer. At
> present I use Putty to connect to the router by the SSL, then I
> manually kill the python process.
> 
> 2. Retrieve the little database located in router memory and backup it
> on my Window PC. At present I use WinSCP (like FTP) to get the pickle
> file.
> 
> Can you help me with that (modules to use, useful code snippets)
> 
> Thank a lot,
> 
> Maxime
> 
or SPyRO


From ldo at geek-central.gen.new_zealand  Sun Sep  9 23:04:38 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 10 Sep 2007 15:04:38 +1200
Subject: concise code (beginner)
References: <13dsvqrqivtf092@corp.supernews.com>
	<13dv4uqqb806ff0@corp.supernews.com> <fbqo83$8fd$1@lust.ihug.co.nz>
	<13e99756io95p66@corp.supernews.com>
Message-ID: <fc2c86$i1l$4@lust.ihug.co.nz>

In message <13e99756io95p66 at corp.supernews.com>, bambam wrote:

> Thank you,

Don't top-post.


From puredata at 11h11.com  Tue Sep 25 22:58:12 2007
From: puredata at 11h11.com (patrick)
Date: Tue, 25 Sep 2007 22:58:12 -0400
Subject: stopping a while True: with the keyboard
In-Reply-To: <1190774898.348656.190760@y42g2000hsy.googlegroups.com>
References: <mailman.1071.1190769576.2658.python-list@python.org>
	<1190774898.348656.190760@y42g2000hsy.googlegroups.com>
Message-ID: <46F9CAC4.6050609@11h11.com>

i don't want to quit my program only get out from a while True:
also i want to use only 1 key like s.

pat



Benjamin wrote:
> On Sep 25, 8:19 pm, patrick <pured... at 11h11.com> wrote:
>   
>> hi all,
>>
>> i am looking for a way to break a while True: when pressing "s" on my
>> keyboard. how can i do this?
>>
>> pat
>>     
>
> Ctrl-C
>
>   


From fredrik at pythonware.com  Wed Sep 26 07:16:11 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 26 Sep 2007 13:16:11 +0200
Subject: Return status from methods in socket class
In-Reply-To: <46fa3a39$1_1@glkas0286.greenlnk.net>
References: <46fa3a39$1_1@glkas0286.greenlnk.net>
Message-ID: <fddf1r$242$1@sea.gmane.org>

Paul D Ainsworth wrote:

> As part of a debugging investigation I would like to be able to display the 
> return status from various methods in the socket class. The methods I'm 
> using are accept, bind, connect, listen, send, recv although not necessarily 
> in that order.
> 
> Is this possible and if so, how?

umm.  don't they all throw exceptions if something goes wrong?

</F>



From steve at holdenweb.com  Thu Sep  6 15:13:25 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 06 Sep 2007 12:13:25 -0700
Subject: Getting original working directory
In-Reply-To: <1658.1882-17889-1055570935-1189104422@seznam.cz>
References: <fbpgvn$sa6$1@sea.gmane.org>
	<1658.1882-17889-1055570935-1189104422@seznam.cz>
Message-ID: <fbpjgm$5jv$1@sea.gmane.org>

rave247 rave247 wrote:
> If I could use os.getcwd() or save the value to some variable before calling os.chdir()
 > I would do it, believe me. However I can't because it is the part of 
code where I
 > can't do any changes.
> 
> Also I do not agree that such thing is not possible because after python script
 > finishes its work, it naturally gets back into the original location 
from where
 > you started the script (in shell you are in the original location 
after script
 > finishes). So this information has to be stored somewhere (probably 
in shell which
 > runs the interpreter) and there *must*  be a way how to get it. 
Simply after
 > calling os.chdir() the original value doen't disappear, I think it 
just needs
 >  some nice hack if python doesn't provide a way how to get it.
> 
Python runs as a sub-process. The parent process (the one that started 
Python) contains the working directory that the Python interpreter 
inherited from it. But you can't expect to just go poking around inside 
the environment of your parent process, which will typically be waiting 
for you to finish before it continues. Why *must* there be a way to get 
at its current directory? Once it continues, of course, it does so in 
the same directory. If you want to hack into your parent process to find 
that information that's up to you, but Python certainly has no special 
mechanism  for doing it.

If you treat the answers to all your questions with so little respect 
it's a wonder you bother asking the questions in the first place.

You didn't even explain what the relationship was between the "myscript" 
that you want to run and the Python code that you want to switch back to 
the original working directory. Sorry, we aren't mind readers (though 
some of the guys on this list get close on occasion).

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From stefan.behnel-n05pAM at web.de  Fri Sep 21 09:02:56 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Fri, 21 Sep 2007 15:02:56 +0200
Subject: An Editor that Skips to the End of a Def
In-Reply-To: <46f2c9c0$0$7365$a9611f8e@news.cityweb.de>
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<46f2c9c0$0$7365$a9611f8e@news.cityweb.de>
Message-ID: <46F3C100.70000@web.de>

Michael v. Fondern wrote:
> (Ctrl-Shift-Down)

Is this the opposite of thumbs up, or is it just to suggest that Eclipse can
come close to Emacs's usability if you try hard?

Stefan


From frank at chagford.com  Wed Sep 12 01:22:48 2007
From: frank at chagford.com (Frank Millman)
Date: Tue, 11 Sep 2007 22:22:48 -0700
Subject: Minor documentation bug
In-Reply-To: <mailman.391.1189522491.2658.python-list@python.org>
References: <1189518490.939985.101460@g4g2000hsf.googlegroups.com>
	<mailman.391.1189522491.2658.python-list@python.org>
Message-ID: <1189574568.565787.175240@k79g2000hse.googlegroups.com>

On Sep 11, 4:55 pm, Tim Golden <m... at timgolden.me.uk> wrote:
> Frank Millman wrote:
> > I spotted a minor bug in the documentation to SimpleXMLRPCServer. It
> > does not seem worth getting a login to the bugtracker just to enter
> > this, so if it is confirmed as a bug perhaps someone would be so kind
> > as to enter it for me.
>
> Frank, please do take the trouble to enter this. With the
> new roundup bugtracker, it's *really easy* to get a login.
>
> http://bugs.python.org
>
> TJG

You are right - it was pretty easy. I have entered the report.

Thanks, Tim

Frank




From bj_666 at gmx.net  Sun Sep 16 12:26:59 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 16 Sep 2007 16:26:59 GMT
Subject: We need PIGs :)
References: <mailman.131.1188450658.28954.python-list@python.org>
	<46d74472$0$402$426a34cc@news.free.fr> <87hcm81dot.fsf@kip.sateh.com>
	<5k9qpsF2mrncU3@mid.uni-berlin.de>
	<mailman.608.1189952287.2658.python-list@python.org>
Message-ID: <5l53qjF655kfU4@mid.uni-berlin.de>

On Sun, 16 Sep 2007 10:17:18 -0400, Colin J. Williams wrote:

> Marc 'BlackJack' Rintsch wrote:
>
>> `getFoo()` is discouraged by PEP 8.  [?]
>
> Perhaps PEP 8 needs rethinking.  I prefer getFoo().

Yeah, *your* preference is a very good reason to rethink PEP?8?  ;-)

Ciao,
	Marc 'BlackJack' Rintsch


From whamil1 at entergy.com  Tue Sep 11 13:28:35 2007
From: whamil1 at entergy.com (Hamilton, William )
Date: Tue, 11 Sep 2007 12:28:35 -0500
Subject: Python code-writing for the blind. Was (Re: newbie: stani's 
	pythoneditor if-else)
In-Reply-To: <1189531123.283413.160870@22g2000hsm.googlegroups.com>
Message-ID: <588D53831C701746A2DF46E365C018CE01D2CB3F@LITEXETSP001.etrsouth.corp.entergy.com>

> From: madzientist
> 
> Thanks, everybody, for the very very useful and kind responses.
> 
> There is a second reason why I asked the question about automatic de-
> indenting. I am teaching myself Python partly so I can then help my
> technically astute, but blind friend learn programming. For the many
> reasons that Pythonistas like to cite often, I thought Python would be
> a good choice to learn programming, and that perhaps the indentation
> problem would be solved by the use of an intelligent editor.
> 
> But now I am not so sure, though I will try Emacs. Is there anyone
> here with experience in such issues ? Maybe for her sake, I should
> switch to learning Perl ;) ;)
> 
> More seriously, the added issue is that SPE uses spaces, not a single
> tab to indent the lines, and I believe it is extremely tedious to use
> screen-readers to keep track of blank spaces at the beginning of each
> line. I have not tried it myself yet, but I will soon.
> 
> Is Python a bad choice for the blind programmer, as a result of a
> tight linkage between visual aspects of the code and its function ? I
> wish the site blindprogramming.com weren't so lifeless...
> 

Can you set SPE to use a single space rather than the typical four
spaces?  Python should accept it just fine.  You'll still have problems
reading other people's code.  Maybe you can write a quick script that
converts code down to one-space indents.


--
-Bill Hamilton


From hat at se-162.se.wtb.tue.nl  Tue Sep  4 06:50:37 2007
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Tue, 04 Sep 2007 12:50:37 +0200
Subject: Printing lists in columns (was: TypeError: 'module object is not
	callable')
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<mailman.315.1188810174.28954.python-list@python.org>
	<46dbd11e$0$6228$426a74cc@news.free.fr>
	<mailman.317.1188812089.28954.python-list@python.org>
	<1188816626.021956.281040@22g2000hsm.googlegroups.com>
	<5k2cjmF1r2aiU1@mid.uni-berlin.de>
	<1188836008.656284.76160@o80g2000hse.googlegroups.com>
	<46dc6f49$0$6207$426a34cc@news.free.fr>
	<1188900397.459760.259580@k79g2000hse.googlegroups.com>
Message-ID: <slrnfdqe3t.i4p.hat@se-162.se.wtb.tue.nl>

On 2007-09-04, Chris.Tidy at jet.uk <Chris.Tidy at jet.uk> wrote:
> Thanks guys. Changing to how Python does things has a lot of geting
> used to!

That's part of the fun :-)

> Do any of you have any ideas on the best way to do the following
> problem:
>
> Each loop I perform, I get a new list of Strings.
> I then want to print these lists as columns adjacent to each other
> starting with the first
> created list in the first column and last created list in the final
> column.

Use zip:

>>> x = ['1', '2']
>>> y = ['3', '4']
>>> for row in zip(x,y):
...   print ', '.join(row)
...
1, 3
2, 4


zip() constructs a list of rows, like

[('1', '3'), ('2', '4')]

which is then quite easy to print



Good luck,
Albert


From richyjsm at gmail.com  Sat Sep 22 20:10:29 2007
From: richyjsm at gmail.com (richyjsm at gmail.com)
Date: Sun, 23 Sep 2007 00:10:29 -0000
Subject: Getting rid of bitwise operators in Python 3?
In-Reply-To: <13fbahtem90fp99@corp.supernews.com>
References: <46f49740$0$32514$4c368faf@roadrunner.com>
	<miaJi.28220$eY.3184@newssvr13.news.prodigy.net>
	<1190484589.890198.266430@y42g2000hsy.googlegroups.com>
	<13fbahtem90fp99@corp.supernews.com>
Message-ID: <1190506229.092718.41690@g4g2000hsf.googlegroups.com>

On Sep 22, 7:50 pm, Steven D'Aprano <st... at REMOVE-THIS-
cybersource.com.au> wrote:
> Everybody forgets that pow can take three arguments, except of course for
> those who use that functionality and would be mighty peeved if it went
> away.

And who is it who uses this functionality?  It's useful in elementary
number theory, sure, but I'd argue that if there are going to be
number theoretical functions in the core then there are other things,
like gcd(), that are far more deserving of inclusion.  It comes up in
the RSA cryptosystem, but if you're using Python's pow for this then
you're surely only writing a toy RSA implementation, perhaps for
educational purposes(?).  Neither of these seem like compelling
arguments to have pow in the core.

Richard



From edgrsprj at ix.netcom.com  Sat Sep  1 21:50:22 2007
From: edgrsprj at ix.netcom.com (E.D.G.)
Date: Sat, 1 Sep 2007 19:50:22 -0600
Subject: Important Research Project
References: <13ddcvm1bsu3s94@corp.supernews.com>
	<13dhm7uec5sp855@corp.supernews.com>
Message-ID: <13dk3p5mqdbvc7f@corp.supernews.com>

"E.D.G." <edgrsprj at ix.netcom.com> wrote in message
news:13dhm7uec5sp855 at corp.supernews.com...

I have the Gnuplot graphics program running now with Windows XP. And it
looks like it will work for my application.
http://www.gnuplot.info




From whamil1 at entergy.com  Tue Sep 11 09:35:06 2007
From: whamil1 at entergy.com (Hamilton, William )
Date: Tue, 11 Sep 2007 08:35:06 -0500
Subject: newbie: stani's python editor if-else
In-Reply-To: <1189517164.302630.307850@w3g2000hsg.googlegroups.com>
Message-ID: <588D53831C701746A2DF46E365C018CE01D2CB3A@LITEXETSP001.etrsouth.corp.entergy.com>

> -----Original Message-----
> From: python-list-bounces+whamil1=entergy.com at python.org
[mailto:python-
> list-bounces+whamil1=entergy.com at python.org] On Behalf Of
> kyosohma at gmail.com
> Sent: Tuesday, September 11, 2007 8:26 AM
> To: python-list at python.org
> Subject: Re: newbie: stani's python editor if-else
> 
> On Sep 10, 11:24 pm, madzientist <madzient... at gmail.com> wrote:
> > hi,
> >
> > two quick questions:
> >
> > a) i am using SPE (latest version) and for some reason, when i type,
> > say
> >
> > if 1==2:
> >     print "not equal"
> >     else:
> >           print "equal"
> >
> > the else is at the same indentation level as the preceding print
> > statement, and i get a syntax error
> >
> > why doesn't spe automatically put the else at the level of the if
> > statement ? what am i dong wrong ? once i manually change the
> > indentation, the code snippet runs perfectly.
> >
> > b) if this is not the group for such elementary questions, please do
> > let me know.
> >
> > thanks !!!!
> >
> > suresh
> 
> I agree with Steve. I have yet to see an IDE for Python (or anything
> else) that unindents statements. Even IDLE, the Official IDE for
> Python, doesn't do that.
> 

IDLE (At least, IDLE 1.0.5) unindents in obvious situations.  I think
it's only on break, continue, pass, and return statements, but there may
be others.

--
-Bill Hamilton


From ldo at geek-central.gen.new_zealand  Sun Sep 23 22:53:11 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 24 Sep 2007 14:53:11 +1200
Subject: subprocess -popen - reading stdout from child - hangs
References: <1190518129.356844.242710@19g2000hsx.googlegroups.com>
Message-ID: <fd78qs$d8c$1@lust.ihug.co.nz>

In message <1190518129.356844.242710 at 19g2000hsx.googlegroups.com>,
gregpinero at gmail.com wrote:

> Let's say I have this Python file called loop.py:
> 
> import sys
> print 'hi'
> sys.stdout.flush()
> while 1:
>     pass
> 
> And I want to call it from another Python process and read the value
> 'hi'.  How would I do it?
> 
> So far I have tried this:
> 
>>>> proc = subprocess.Popen('python
>>>> /home/chiefinnovator/loop.py',shell=True,stdin=subprocess.PIPE,stdout=subprocess.PIPE)
>>>> proc.stdout.read()
> 
> But it just hangs at read()

That's because you didn't tell it how much to read, so by default it tries
to read until EOF <http://docs.python.org/lib/bltin-file-objects.html>. But
since the subprocess is still running and hasn't closed its stdout, the
pipe has not reached EOF.


From kay.schluehr at gmx.net  Tue Sep 18 02:33:37 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Mon, 17 Sep 2007 23:33:37 -0700
Subject: can Python be useful as functional?
In-Reply-To: <mailman.690.1190079028.2658.python-list@python.org>
References: <1190073045.618869.261290@k79g2000hse.googlegroups.com>
	<mailman.690.1190079028.2658.python-list@python.org>
Message-ID: <1190097217.181332.140620@d55g2000hsg.googlegroups.com>

On 18 Sep., 03:30, "Evan Klitzke" <e... at yelp.com> wrote:

> > My question is: how can we call a language "functional" if it's major
> > implementation has a limited stack? Or is my code wrong?
>
> Python does not optimize tail recursion.

Never mind. In the provided example the call to sieve() is not in tail
position anyway ;)

[...]

> If you
> want to write functional code, use a real functional language!

It's hard to disagree. As a Python programmer I'd rather care for
smooth integration with code written in Haskell or OCaml than adopting
their particular programming idioms. For instance the Python - OCaml
bridge is aged and I'm not aware that one between Python and Haskell
even exists.




From robertoedwins at gmail.com  Wed Sep  5 22:33:15 2007
From: robertoedwins at gmail.com (rieh25)
Date: Wed, 5 Sep 2007 19:33:15 -0700 (PDT)
Subject: Module for mod_python
In-Reply-To: <1189041758.262088.60520@y42g2000hsy.googlegroups.com>
References: <12506829.post@talk.nabble.com>
	<1189041758.262088.60520@y42g2000hsy.googlegroups.com>
Message-ID: <12514597.post@talk.nabble.com>


Thanks for your response. Actually I have looked at some of them, although
not in great detail and haven't actually installed them. I do have to do
some more investigating, but I think I can say something right now. The one
thing I think I have to offer in terms of originality is the idea of keeping
state of record selection, and making that selection affect (filter) the
listing of related tables.

As an example this is the way a master-detail application for a chain of
book stores works normally: There is a detail form with a list of stores,
and upon selection of one of them, the id of the store is passed as a
parameter to a new page which lists the books in that store.

In my version, there is also a detail form with a list of the stores, but
the store id is not passed as a parameter, it is saved as a session
variable. Upon loading the page with the list of books, a filter takes
effect taking into accoung the store id. The saving of the session variable
and the filtering is never specified though. It is done automatically given
the existence of a foreign key in the books table making reference to a
store id.

As far as I know, db object relational mapper systems take care of the
creation of the tables in the actual database, and are capable of generating
forms given a table name, but my system would also take care of the
selection of records, and the cascading effect that has on related tables in
the sense of how they are listed in detail forms with corresponding filters.
I'm not sure that it is that new of an idea, or that helpful from someone
else's point of view, but it is something that I have put into practice and
have a good concept of it.

And I do recognize I should do more investigating...


Graham Dumpleton-2 wrote:
> 
> On Sep 6, 9:32 am, rieh25 <robertoedw... at gmail.com> wrote:
>> Is it such a bad idea that it doesn't deserve a reply?
> 
> You only posted the question six hours ago. Maybe the people who might
> want to comment are asleep.
> 
> BTW, have you done an analysis of the various existing database object
> relational mapper systems for Python that already exist? There are
> also some systems for automatic web application forms generation based
> on database data as well.
> 
> How is what you have in mind different to or not covered by these
> existing packages?
> 
> If you describe how what you want to do isn't satisfied by the
> existing systems then people may be more interested in commenting. If
> you aren't aware of these existing systems then perhaps use Google to
> do some research on them first.
> 
> Graham
> 
>> rieh25 wrote:
>>
>> > I've been thinking about a module (actually I have it partially
>> > implemented in Zope), that would do the following things:
>>
>> > - Read the structure of a MySql database (fill a dictionary with it)
>>
>> > In order to:
>>
>> > - Quickly create detail/filter/update forms given a table name (without
>> > specifying the fields because they have already been detected)
>> > - Keep state of record selection. In order to implement Master-Detail
>> form
>> > processing, with unlimited levels of parent-child table relations,
>> which
>> > have also been detected already (foreign keys)
>> > - Management of interrelation between security and menus (a user can
>> only
>> > access certain parts of the application)
>>
>> > I think that Ruby on Rails does something similar, but still I thing it
>> > would be interesting to implement it in Python. What do you think?
>>
>> --
>> View this message in
>> context:http://www.nabble.com/Module-for-mod_python-tf4386823.html#a12513012
>> Sent from the Python - python-list mailing list archive at Nabble.com.
> 
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 
> 

-- 
View this message in context: http://www.nabble.com/Module-for-mod_python-tf4386823.html#a12514597
Sent from the Python - python-list mailing list archive at Nabble.com.



From stefan.behnel-n05pAM at web.de  Tue Sep  4 02:20:20 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Tue, 04 Sep 2007 08:20:20 +0200
Subject: Python object <-> XML
In-Reply-To: <1188849714.128121.139450@r34g2000hsd.googlegroups.com>
References: <1188849714.128121.139450@r34g2000hsd.googlegroups.com>
Message-ID: <46DCF924.8080904@web.de>

Samuel wrote:
> Say you have the following XML:
> 
> <item ref="1">
>   <name>item 1</name>
> </item>
> <item ref="2">
>   <name>item 2</name>
> </item>
> <group>
>   <item ref="1" />
>   <item ref="2" />
>   <name>my group</name>
> </group>
> 
> Is there an easy way (i.e. without writing a sax/dom parser) to load
> this into a (number of) Python object(s), manipulate the instance, and
> save the result back to XML?

Try lxml.objectify. It doesn't copy your data into other objects, but it gives
you all the freedom to design your own objects as an abstraction of the XML
data. See here:

http://codespeak.net/lxml/objectify.html

especially these sections:

http://codespeak.net/lxml/objectify.html#element-access-through-object-attributes
http://codespeak.net/lxml/objectify.html#python-data-types
http://codespeak.net/lxml/objectify.html#defining-additional-data-classes

It's part of lxml, which makes it plenty fast, highly flexible and gives you
all the XML features you might ever need. :)

Stefan


From paul.hankin at gmail.com  Wed Sep 26 18:44:16 2007
From: paul.hankin at gmail.com (Paul Hankin)
Date: Wed, 26 Sep 2007 22:44:16 -0000
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <Xns99B7DE66C56F6duncanbooth@127.0.0.1>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>
	<1190753722.026806.254530@d55g2000hsg.googlegroups.com>
	<1190756003.292096.71130@o80g2000hse.googlegroups.com>
	<1190789981.385466.37870@57g2000hsv.googlegroups.com>
	<Xns99B760A3F5859duncanbooth@127.0.0.1>
	<1190805297.182232.116830@50g2000hsm.googlegroups.com>
	<Xns99B7957CCE43Fduncanbooth@127.0.0.1>
	<1190815180.945099.248670@n39g2000hsh.googlegroups.com>
	<1190816657.574437.80980@g4g2000hsf.googlegroups.com>
	<1190820026.299569.110250@n39g2000hsh.googlegroups.com>
	<Xns99B7DE66C56F6duncanbooth@127.0.0.1>
Message-ID: <1190846656.770087.173230@19g2000hsx.googlegroups.com>

On Sep 26, 9:52 pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> Paul Hankin <paul.han... at gmail.com> wrote:
> >> So should Duncan's
>
> >>     def __removekey(self, key):
> >>         if key in self.__addkeys:
> >>             del self.__addkeys[key]
> >>         else:
> >>             self.__delkeys.add(key)
>
> >> be changed to:
>
> >>     def __removekey(self, key):
> >>         if key in self.__addkeys:
> >>             del self.__addkeys[key]
> >>         self.__delkeys.add(key)
>
> > Yes, and the same in __addkey: if it's in __delkeys it should be
> > removed from there, and added to __addkeys. There's an invariant: any
> > key is in at most one of __addkeys and __delkeys.
>
> No, don't do that. The code was fine as I had written it, except for the
> minor point that sets don't support 'del'! Also there need to be some tests
> which actually exercise those two branches of the code: once you add
> appropriate tests it will become obvious that you really do need the else.
>
> A key which is in dict must be either in __keycache or in __addkeys, but
> never in both.

Yes, I'm sorry: you're right.

But there's a different bug: if you delete a key that's not in the
dict, you'll add it to the deleted list before the exception for the
missing key is raised.

sd = sorteddict.sorteddict()
sd['a'] = 'a'
print sd.keys() = ['a']
try:
    del sd['b']
except:
    pass
sd['b'] = 'b'
print sd.keys()

The second print statement produces ['a'] rather than ['a', 'b']

--
Paul Hankin



From chris.monsanto at gmail.com  Fri Sep 21 18:22:02 2007
From: chris.monsanto at gmail.com (chris.monsanto at gmail.com)
Date: Fri, 21 Sep 2007 22:22:02 -0000
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <1190412475.772358.109810@n39g2000hsh.googlegroups.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
Message-ID: <1190413322.962737.53900@r29g2000hsg.googlegroups.com>

On Sep 21, 6:07 pm, Cristian <super.sgt.pep... at gmail.com> wrote:
> On Sep 21, 2:48 pm, chris.monsa... at gmail.com wrote:
>
>
>
> > There are already anonymous functions in Python.
>
> > lambda x, y, z: x + y + z
>
> > is the same as:
>
> > def _(x, y, z): return x + y + z
>
> > As for the method stuff, check out staticmethod(). If you assign
> > staticmethod(<function here>) to an object, it will be treated as a
> > normal function and not as a "method."
>
> > I have my own personal opinions about how methods should be in Python,
> > but, whatever. It's weird to deal with stuff like this:
>
> > x.y = re.match # Assign a function to an attribute of a class, but it
> > doesn't work because you can't assign anything but methods!
> > x.y = staticmethod(re.match) # Ugly
>
> True, there is lambda, but that is very limited. It might be useful
> for key arguments, but not much else. It doesn't solve the teaching
> problem of "See, functions are just like any other data type. You can
> assign it to a variable." It would be a footnote if it's mentioned at
> all. My hope is to subtly reinforce the notion that functions are data
> and can be passed around. The current function declaration doesn't
> help with this. Creating a function and assigning it to a name is
> exactly what Python does, why not have it come out in the syntax? It's
> not necessary, yes, but I think it would be helpful for teaching
> purposes.
>
> Again, it's not necessary as much as it's more intuitive and obvious
> what's going on. This helps a beginner sort out the process from the
> syntax without taking it on faith. They can see the class declaration
> and see "I'm defining just another attribute to this class only this
> time it happens to be method".
>
> There is nothing functionally lacking in Python. I'm just curious if
> there's anything Python can do syntax-wise to help a person better
> grasp programming ideas and Python's inner workings.

Guido apparently doesn't like lambda; I'm not really sure why, it's
extremely useful. There were rumors of it leaving in Python 3000, but
thankfully there was the decision to keep them. (I have a feeling if
they weren't kept in, a project fork would have happened or such.)
Anyway, one of the biggest problems implementation wise is indentation
in an expression - there is no expression currently that uses
significant whitespace. Python draws a pretty clear line between
expression and statement. I do agree with you however, it seems as if
there is an arbitrary line between function definitions and normal
variable assignment that shouldn't be there for the sake of
consistency.

A question: if you WERE to implement function definitions as normal
expressions, how would you go about embedding it within an expression?

x = map(def a:
            <line of code>
            <line of code>
            <line of code>
        , [1, 2, 3])

It looks hideous in my opinion and lining up the , with the def is
ugly. Not to mention currently, inside groupings, whitespace is
ignored. How would you handle a whitespace signif. expression inside a
grouping which by definition ignores whitespace?



From jzgoda at o2.usun.pl  Mon Sep  3 17:58:58 2007
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Mon, 03 Sep 2007 23:58:58 +0200
Subject: Let's Unite Against Jews and Mongrels!
In-Reply-To: <203fd3ln96hpvqt8ha1vm99frauso8fm8l@4ax.com>
References: <1188198797.772672.60840@r29g2000hsg.googlegroups.com>
	<fau6t4$e10$1@news-01.bur.connect.com.au>
	<13d7kfckusd3kb3@corp.supernews.com>
	<203fd3ln96hpvqt8ha1vm99frauso8fm8l@4ax.com>
Message-ID: <fbi0co$lac$1@nemesis.news.tpi.pl>

Barry OGrady napisa?(a):

> What could anyone have against mongrels?

You clearly don't know how abusive ROR can be.

-- 
Jarek Zgoda
http://jpa.berlios.de/


From kar1107 at gmail.com  Wed Sep 19 19:26:10 2007
From: kar1107 at gmail.com (Karthik Gurusamy)
Date: Wed, 19 Sep 2007 23:26:10 -0000
Subject: Sets in Python
In-Reply-To: <1190239608.835359.51150@22g2000hsm.googlegroups.com>
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
	<CeB*qHeVr@news.chiark.greenend.org.uk>
	<1190235483.412972.81280@v23g2000prn.googlegroups.com>
	<1190239608.835359.51150@22g2000hsm.googlegroups.com>
Message-ID: <1190244370.741482.6540@y27g2000pre.googlegroups.com>

On Sep 19, 3:06 pm, Paddy <paddy3... at googlemail.com> wrote:
> On Sep 19, 9:58 pm, Karthik Gurusamy <kar1... at gmail.com> wrote:
>
> > Since we know hashing is used, all that is needed is, a well-defined
> > way to construct a hash out of a mutable. "Given a sequence, how to
> > get a hash" is the problem. If later the given sequence is different,
> > that's not the dict's problem.
>
> Oh it is possible to construct a hash from a mutable. What is
> difficult is creating the same hash when the mutable mutates.

Why? There is no reason that the dict should maintain the same hash,
after all the user is calling with a different sequence as key (after
the mutation).

There seems to be an underlying assumption that the dictionary key-
>value mapping should somehow maintain the mapping even when the key
changes behind its back.

The contract could very well be, hey if you give me a different
sequence later (by mutating the one you added), don't expect me to
find it in the dictionary.


>Or
> indeed working out what it means when a hash key mutates and you
> access the dictionary.
> Ignoring this gives the programmer a big problem hence the limitation.
>
> I don't think you have a better solution.

But why would a programmer expect to find the match, when his/her code
has changed the sequence (or has somehow let the hash key mutate) from
the time of dictionary addition.

If I did, a = [10, 20] and I did d[a]= 'foo', then a.append(30).
If dict complains key error on d[a] now, I won't be surprised. If I do
d[[10, 20, 30]], I will be surprised if it doesn't find the item. Of
course, in today's behavior the above is syntax error.

Karthik


>
> - Paddy.




From claird at lairds.us  Wed Sep 12 11:14:35 2007
From: claird at lairds.us (Cameron Laird)
Date: Wed, 12 Sep 2007 15:14:35 +0000
Subject: Basic GUI
References: <1189569282.372083.264560@57g2000hsv.googlegroups.com>
	<1189603073.639193.193390@19g2000hsx.googlegroups.com>
Message-ID: <rbclr4-hh5.ln1@lairds.us>

In article <1189603073.639193.193390 at 19g2000hsx.googlegroups.com>,
 <kyosohma at gmail.com> wrote:
			.
			.
			.
>You can also use threads, which is a little bit more portable than
>using Python's fork methodology, or so I've read. The concepts on this
>page can be applied to any GUI toolkit you choose:
>http://wiki.wxpython.org/LongRunningTasks
>
>I've used them with wxPython, but iirc, Lutz does something quite
>similar with Tkinter in his latest edition of "Programming Python".
>
>I think what Michele is referring to is the subprocess module, which
>is also useful.
>
>Mike
>

Let's make it even more definite:  read <URL:
http://docs.python.org/lib/module-subprocess.html >
for details about the subprocess module.

Don, you describe do-something-and-retrieve-the-
results, and ask about inter-task communications.
We can give more pointed advice with just a few more
details:  is it OK for your application to block 
during a do-something-and-retrieve-the-results
sequence?  Is it acceptable, for example, that some-
one push a button on your GUI, Python directs an HTTP
query, then the GUI freezes until the answer returns?
If your application can behave so, the programming
will be more direct than if you require the retrievals
to be done "in the background" while the GUI remains
"live".


From http  Thu Sep 27 21:52:38 2007
From: http (Paul Rubin)
Date: 27 Sep 2007 18:52:38 -0700
Subject: Python 3.0 migration plans?
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<fdhja4$qdk$1@daisy.noc.ucla.edu>
	<mailman.1199.1190942384.2658.python-list@python.org>
Message-ID: <7x641vh7yx.fsf@ruckus.brouhaha.com>

Steve Holden <steve at holdenweb.com> writes:
> So what we need is a poll on what the questions should be. I *love* c.l.py.

One of the offered answers to the current question should be "never".
That is, I'm hoping to skip 3.0 and switch directly to PyPy.


From zentraders at gmail.com  Sun Sep  2 10:43:24 2007
From: zentraders at gmail.com (Zentrader)
Date: Sun, 02 Sep 2007 14:43:24 -0000
Subject: Let's Unite Against Jews and Mongrels!
In-Reply-To: <46D40BFE.2020301@comcast.net>
References: <1188198797.772672.60840@r29g2000hsg.googlegroups.com>
	<1188300284.507909.126770@57g2000hsv.googlegroups.com>
	<46D40BFE.2020301@comcast.net>
Message-ID: <1188744204.822322.198360@57g2000hsv.googlegroups.com>

On Aug 28, 4:50 am, "Richard B. Gilbert" <rgilber... at comcast.net>
wrote:
>> Unless, of course, someone has a working "Killbot".  If anyone has such
> a thing, please kill that "MI5victim" moron as well!

I reported MI5victim to spam at uce.gov and it appears to be gone, as
well as the "free air conditioner"'s posts.  (Thanks Steve Holden for
the reminder that it doesn't have to be personal e-mail spam in order
to be reported). If the OP posts again, report it.  Something like 75%
of internet mail is spam.



From mensanator at aol.com  Sun Sep 16 20:58:09 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: Sun, 16 Sep 2007 17:58:09 -0700
Subject: Try this
In-Reply-To: <1189984913.956999.163100@n39g2000hsh.googlegroups.com>
References: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>
	<13eqsdfsfvsa16f@corp.supernews.com>
	<1189969529.652871.19280@50g2000hsm.googlegroups.com>
	<mailman.621.1189970593.2658.python-list@python.org>
	<1189979679.969074.216490@y42g2000hsy.googlegroups.com>
	<1189981681.745195.18130@y42g2000hsy.googlegroups.com>
	<1189983233.709832.124290@19g2000hsx.googlegroups.com>
	<1189984913.956999.163100@n39g2000hsh.googlegroups.com>
Message-ID: <1189990689.259451.232570@g4g2000hsf.googlegroups.com>

On Sep 16, 6:21?pm, John Machin <sjmac... at lexicon.net> wrote:
> On Sep 17, 8:53 am, "mensana... at aol.com" <mensana... at aol.com> wrote:
>
>
>
>
>
> > On Sep 16, 5:28?pm, John Machin <sjmac... at lexicon.net> wrote:
>
> > > On Sep 17, 7:54 am, "mensana... at aol.com" <mensana... at aol.com> wrote:
>
> > > > On Sep 16, 2:22?pm, Steve Holden <st... at holdenweb.com> wrote:
>
> > > > > mensana... at aol.com wrote:
> > > > > > On Sep 16, 1:10?pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> > > > > >> On Sun, 16 Sep 2007 01:46:34 -0700, GeorgeRXZ <george... at gmail.com>
> > > > > >> declaimed the following in comp.lang.python:
>
> > > > > >>> Then Open the Notepad and type the following sentence, and save the
> > > > > >>> file and close the notepad. Now reopen the file and you will find out
> > > > > >>> that, Notepad is not able to save the following text line.
> > > > > >>> Well you are speed
> > > > > >>> This occurs not only with above sentence but any sentence that has
> > > > > >>> 4 3 3 5 (sequence of characters: Well=4 you=3 are=3 speed=5)
> > > > > >>         I tried. I also opened the saved file in SciTE...
> > > > > >> And the text WAS there...
>
> > > > > >>         It is Notepad that can not properly render what it,
> > > > > >> itself, saved.
>
> > > > > > C:\Documents and Settings\mensanator\My Documents>type huh.txt
> > > > > > Well you are speed
>
> > > > > > Yes, file was saved correctly.
> > > > > > But reopening it shows 9 unprintable characters.
> > > > > > If I copy those to a new file (huh1.txt):
>
> > > > > > C:\Documents and Settings\mensanator\My Documents>type huh1.txt
> > > > > > ?????????
>
> > > > > > But wait...the new file is 20 characters, not 9.
>
> > > > > > 09/16/2007  01:44 PM                18 huh.txt
> > > > > > 09/16/2007  01:54 PM                20 huh1.txt
>
> > > > > > C:\Documents and Settings\mensanator\My Documents>dump huh.txt
> > > > > > huh.txt:
> > > > > > 00000000  5765 6c6c 2079 6f75 2061 7265 2073 7065 Well you are spe
> > > > > > 00000010  6564                                    ed
>
> > > > > > Here's what it's actually doing:
>
> > > > > > C:\Documents and Settings\mensanator\My Documents>dump huh1.txt
> > > > > > huh1.txt:
> > > > > > 00000000  fffe 5765 6c6c 2079 6f75 2061 7265 2073 .~Well you are s
> > > > > > 00000010  7065 6564                               peed
>
> > > > > One word: Unicode.
>
> > > > > The "open" and "save" dialogs allow you to specify an encoding.
>
> > > > And the encoding specified was ANSI.
>
> > > > > If you
> > > > > specify Unicode the you will get what you see above.
>
> > > > And if you specify ANSI _before_ you click the file name,
> > > > the specification switches to Unicode and has to then
> > > > be manually switched back to ANSI.
>
> > > > > If you specify ANSI
> > > > > you will get the text you entered.
>
> > > > It's still a bug in the "open" dialog.
>
> > > It's more like a bug/feature in its encoding detector.
>
> > It is NOT a feature. If I save something as ANSI,
> > there is no excuse for it not to re-open in ANSI.
>
> It doesn't know that you or anybody else saved it as "ANSI". All it is
> seeing is a string of bytes.
>
> If you are silly enough to type in
> [that's "\xef\xbb\xbf" repeated a few times]
> and save it as "ANSI", it has every excuse to open it as something
> else :-)
>

Did you notice that those three bytes all have bit 7 set?

So they are not ASCII.

There is no excuse to treat a string of ASCII codes as
anything other than ASCII without specific direction
from the user.

>
> > > I can get it to
> > > switch to Unicode only if there's an even number of characters AND the
> > > line is NOT terminated by CRLF -- add/remove one alpha character, or
> > > hit the enter key at the end of the line, and it won't detect it as
> > > Unicode when you open it again.
>
> > > You only get the BOM (0xfffe) if you are silly enough to save it while
> > > it's open in Unicode mode.
>
> > That was a test. I wasn't so stupid as to save
> > to the original file, but to make a copy.
>
> > > > > By the way, this has precisely what to do with Python?
>
> > > > I've been known to use Notepad to create Python
> > > > source code.
>
> > > Your source code would have to be trivially short to trigger the
> > > strange behaviour.
>
> > Makes you wonder what other edge cases aren't
> > handled properly.
>
> > Makes you wonder why Microsoft doesn't employ
> > professional programmers.
>
> I'm eagerly awaiting publication of your professional specification
> for correctly detecting the encoding of an arbitrary stream of
> bytes

The very presence of an algorithm to detect encoding is a bug.
Files with they .txt extension should always be treated as ANSI
even if they contain binary data. Notepad should never be
allowed to try to decide what the encoding is if the the open
dialog has the encoding set to ANSI.



From paul.ainsworth at baesystems.com  Wed Sep 26 07:09:17 2007
From: paul.ainsworth at baesystems.com (Paul D Ainsworth)
Date: Wed, 26 Sep 2007 12:09:17 +0100
Subject: Return status from methods in socket class
Message-ID: <46fa3a39$1_1@glkas0286.greenlnk.net>

As part of a debugging investigation I would like to be able to display the 
return status from various methods in the socket class. The methods I'm 
using are accept, bind, connect, listen, send, recv although not necessarily 
in that order.

Is this possible and if so, how?

TIA,

Paul. 




From jstroud at mbi.ucla.edu  Tue Sep 18 05:41:10 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Tue, 18 Sep 2007 02:41:10 -0700
Subject: raw string
In-Reply-To: <mailman.705.1190107036.2658.python-list@python.org>
References: <mailman.705.1190107036.2658.python-list@python.org>
Message-ID: <7ZMHi.8465$z_5.4637@nlpi069.nbdc.sbc.com>

Konstantinos Pachopoulos wrote:
> Hi,
> i am trying to execute the following query on a DB:
> qe.execQuery(r"SELECT * FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY 
> '"' LINES TERMINATED BY '\n' FROM Commiter")
> 
> However, whether i put the r in the front or not, i always get an error 
> about the "\n".
> What's wrong?

Try Triple-quoting the whole thing (you have an un-escaped " in your 
present version):

   r"""SELECT[yadda][yadda]Commtter""""

James


From debl2NoSpam at verizon.net  Sat Sep  1 01:31:00 2007
From: debl2NoSpam at verizon.net (David Lees)
Date: Sat, 01 Sep 2007 05:31:00 GMT
Subject: HowTo Use Cython on a Windows XP Box?
In-Reply-To: <1188623610.532790.114000@o80g2000hse.googlegroups.com>
References: <rO3Ci.32$453.27@trndny02>
	<1188618022.208258.15620@22g2000hsm.googlegroups.com>
	<1188623610.532790.114000@o80g2000hse.googlegroups.com>
Message-ID: <oO6Ci.603$J96.503@trnddc02>

John Machin wrote:
> On Sep 1, 1:40 pm, Paul McGuire <pt... at austin.rr.com> wrote:
>> On Aug 31, 9:06 pm, David Lees <debl2NoS... at verizon.net> wrote:
>>
>>> August 31, 2007
>>> I just downloaded the current Cython release and have no problem running
>>> the cpython.py translator on the demo code.  But when I try compiling, I
>>> get an error complaining that my version of Python (which is the current
>>> 2.5.1 downloaded from python.org) was compiled with Visual C++ 2003.  I
>>> only have Visual C++ 2005 on my machine and am unable to find a download
>>> of 2003 on the Microsoft site (no big surprise).  I have never built
>>> Python from source.  Is it necessary or can someone suggest an alternative?
>>> TIA
>>> david lees
>> Unless you are customizing Python (and you can accomplish a *lot*
>> without doing so), it is not necessary to build Python from source.
>> Download one of the pre-built Windows binaries and install it, or get
>> the Win Python distribution from ActiveState and install that.  Then
>> start writing your own Python demo scripts.
>>
> 
> Paul, AFAICT the OP is referring not to CPython, but to Cython, which
> is a Pyrex fork. See http://www.cython.org/
> 
> Building CPython from source is likely to be a red herring. The OP's
> question appears to be "How do I, on Windows, compile C code generated
> by Cython into a pyd that will play happily with the standard-issue
> python.exe and python25.dll?", and is probably best directed to one of
> the 3 forums mentioned on the above-referenced page.
> 
> HTH,
> John
> 
> 
> 
> 
John,

Yes, you are correct in understanding my question.  I thought my post 
was clear, but I guess not.  I will go try the pyrex list.


From steve at REMOVE-THIS-cybersource.com.au  Fri Sep  7 23:24:54 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sat, 08 Sep 2007 03:24:54 -0000
Subject: Generating a unique identifier
References: <13e2fgbbpsatm39@corp.supernews.com>
	<7x3axq7a8a.fsf@ruckus.brouhaha.com>
	<13e3us269f59s7a@corp.supernews.com>
	<7xd4wt99yv.fsf@ruckus.brouhaha.com>
Message-ID: <13e45g6tljmfc32@corp.supernews.com>

On Fri, 07 Sep 2007 19:17:44 -0700, Paul Rubin wrote:

>> Here's something which is a little less predictable than a straight
>> counter:
> 
> It's still very easy to generate valid id's from that, or guess the next
> one with non-negligible probability.

Well, in my specific application, the only consequences of guessing a 
valid id is that you get to congratulate yourself for guessing a valid 
id :)

As it turned out, I decided that since the only reason I had for avoiding 
consecutive ids was that they didn't look random, and that this would not 
really matter because no human being (including myself) was actually 
going to be looking at them except during debugging, I used the 
intertools.count() solution.


Thanks to all who replied.



-- 
Steven.


From attn.steven.kuo at gmail.com  Fri Sep  7 11:03:09 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: Fri, 07 Sep 2007 08:03:09 -0700
Subject: exponential float formmating
In-Reply-To: <1189170499.945175.275210@57g2000hsv.googlegroups.com>
References: <1189170499.945175.275210@57g2000hsv.googlegroups.com>
Message-ID: <1189177389.629836.250660@57g2000hsv.googlegroups.com>

On Sep 7, 6:08 am, zunbe... at gmail.com wrote:
> Hi,
>
> For compatibility reasons with an old program I have to format string
> in exponential
> format with the following format
>
> 0.xxxxxE-yy
>
> This means that the number start always by 0 and after the exponent
> there should be alway the sing and 2 number for the exponent.
>
> for example 13 shoud be 0.13000E+02
> I always get 1.30000E001
>


Perhaps it would then be worthwhile to subclass float?

import math
class ffloat(float):
    """Formatted float?"""
    def __str__(self):
        prefix = (self < 0) and '-' or ''
        fabs = math.fabs(self)
        exponent = math.floor(math.log10(fabs)) + 1
        significand = fabs / math.pow(10, exponent)
        width = exponent > 0 and 2 or 3
        return '%s%fE%0*d' % (prefix,significand,width,exponent)


f = ffloat(13)
print f
f = ffloat(-12.23e-4)
print f


--
Hope this helps,
Steven



From mbratcher at cclpcitrus.com  Fri Sep 28 10:48:58 2007
From: mbratcher at cclpcitrus.com (Mark Bratcher)
Date: Fri, 28 Sep 2007 10:48:58 -0400
Subject: Emailing the attachment created with the Quick Screenshots
	Script(Python + PIL)
Message-ID: <000001c801de$b670c370$eafca8c0@tfccorp.intra>

I tried the suggestion at the other end of this link without any luck.  Does
anyone have a working script which will send the screenshot file created by
the Quick Screenshots Script (Python + PIL)?  I receive errors like access
denied errors and not defined errors.

 

See the second example from the email package; it creates a MIME message  

with an attachment and sends it using SMTP.
<http://docs.python.org/lib/node162.html>

 

 

Mark Bratcher

Consolidated Citrus, LP

4210-250 Metro, Parkway

Fort Myers, FL  33916

239-275-4060 ext 219

 

-------------- next part --------------
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From gregpinero at gmail.com  Wed Sep 12 11:09:02 2007
From: gregpinero at gmail.com (gregpinero at gmail.com)
Date: Wed, 12 Sep 2007 15:09:02 -0000
Subject: Get Only the Last Items in a Traceback
In-Reply-To: <fc8aqq$3us$02$1@news.t-online.com>
References: <1189562968.529414.27910@w3g2000hsg.googlegroups.com>
	<fc8aqq$3us$02$1@news.t-online.com>
Message-ID: <1189609742.781671.143320@g4g2000hsf.googlegroups.com>

On Sep 12, 5:17 am, Peter Otten <__pete... at web.de> wrote:
>
> Your assessment is wrong. You only get the extra lines in the traceback if
> you don't immediately wrap the exec statement in a try ... except block:
>
> $ cat snip_traceback1.py
> import traceback
>
> def alpha():
>     try:
>         beta()
>     except Exception, e:
>         traceback.print_exc()
>
> def beta():
>     gamma()
>
> def gamma():
>     exec s in {}
>
> s = """
> def delta():
>     epsilon()
>
> def epsilon():
>     1/0
> delta()
> """
>
> if __name__ == "__main__":
>     alpha()
>
> $ python snip_traceback1.py
> Traceback (most recent call last):
>   File "snip_traceback1.py", line 5, in alpha
>     beta()
>   File "snip_traceback1.py", line 10, in beta
>     gamma()
>   File "snip_traceback1.py", line 13, in gamma
>     exec s in {}
>   File "<string>", line 7, in <module>
>   File "<string>", line 3, in delta
>   File "<string>", line 6, in epsilon
> ZeroDivisionError: integer division or modulo by zero
>
> So the first step is to move the try ... except closer to the exec:
>
> $ cat snip_traceback2.py
> import traceback
>
> def alpha():
>     beta()
>
> def beta():
>     gamma()
>
> def gamma():
>     try:
>         exec s in {}
>     except Exception, e:
>         traceback.print_exc()
>
> s = """
> def delta():
>     epsilon()
>
> def epsilon():
>     1/0
> delta()
> """
>
> if __name__ == "__main__":
>     alpha()
>
> $ python snip_traceback2.py
> Traceback (most recent call last):
>   File "snip_traceback2.py", line 11, in gamma
>     exec s in {}
>   File "<string>", line 7, in <module>
>   File "<string>", line 3, in delta
>   File "<string>", line 6, in epsilon
> ZeroDivisionError: integer division or modulo by zero
>
> You are almost there. Now let's strip off the outermost traceback:
>
> $ cat snip_traceback3.py
> import sys
> import traceback
>
> def alpha():
>     beta()
>
> def beta():
>     gamma()
>
> def gamma():
>     try:
>         exec s in {}
>     except Exception, e:
>         etype, value, tb = sys.exc_info()
>         traceback.print_exception(etype, value, tb.tb_next)
>
> s = """
> def delta():
>     epsilon()
>
> def epsilon():
>     1/0
> delta()
> """
>
> if __name__ == "__main__":
>     alpha()
>
> $ python snip_traceback3.py
> Traceback (most recent call last):
>   File "<string>", line 7, in <module>
>   File "<string>", line 3, in delta
>   File "<string>", line 6, in epsilon
> ZeroDivisionError: integer division or modulo by zero
>
> Heureka.
>
> Peter

Thanks for the help, Peter.  That's exactly what I need.  Now could I
use your tb.tb_next trick a couple times and thus avoid moving the try/
except?

-Greg



From gagsl-py2 at yahoo.com.ar  Thu Sep  6 12:01:36 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 06 Sep 2007 09:01:36 -0700
Subject: reload(sys)
In-Reply-To: <1189077209.646830.111990@19g2000hsx.googlegroups.com>
References: <1188521143.421431.119100@l22g2000prc.googlegroups.com>
	<JK2dnSgydPkg8ErbnZ2dnUVZ_u3inZ2d@comcast.com>
	<1188564816.430863.219560@w3g2000hsg.googlegroups.com>
	<f8GdnZ-6HbH-1kXbnZ2dnUVZ_s3inZ2d@comcast.com>
	<1188662049.337034.58220@w3g2000hsg.googlegroups.com>
	<b4GdnYMUSPu56UbbnZ2dnUVZ_u2mnZ2d@comcast.com>
	<1189077209.646830.111990@19g2000hsx.googlegroups.com>
Message-ID: <1189094496.120836.61870@o80g2000hse.googlegroups.com>

On 6 sep, 08:13, S?nmez Kartal <rainwatch... at gmail.com> wrote:
> On 3 Eyl?l, 05:40, Steven Bethard <steven.beth... at gmail.com> wrote:
> > S?nmez Kartal wrote:
> > > I was using the XMLBuilder(xmlbuilder.py). I'm writing XML files as
> > > "f.write(str(xml))". At execution of that line, it gives error with
> > > description, configure your default encoding...
>
> > Can you show the code where you populate the XMLBuilder? I'm guessing
> > you're doing something like::
> >      import xmlbuilder
> >      builder = xmlbuilder.XMLBuilder()
> >      builder.foo = dict(bar='? and ?')
> >      str(builder)
>
> > That breaks because the string '? and ?' is not properly encoded. Have
> > you declared an encoding in your source file? PEP 263 shows you how:

> http://rafb.net/p/RfaF8215.html
>
> products in the code is a list of dictionaries which are returned by
> makeProduct function.
>
> I'm not typing or pasting those characters into my script. So,
> declaring an encoding didn't make it. :-( But, your code excerpt
> runned well.

You should ensure that arguments to makeProduct are either:
- unicode objects
- ASCII strings

If you got them from some other place, decode the strings as soon as
possible into unicode. Read <http://www.amk.ca/python/howto/unicode>
to understand what's happening (and why the XMLBuilder error message
is *not* a good advice)

--
Gabriel Genellina



From miki.tebeka at gmail.com  Sun Sep  9 02:34:45 2007
From: miki.tebeka at gmail.com (Miki)
Date: Sun, 09 Sep 2007 06:34:45 -0000
Subject: Using s.sort([cmp[, key[,
	reverse]]]) to sort a list of objects based on a attribute
In-Reply-To: <87k5r2zhd6.fsf@kip.sateh.com>
References: <1189173455.525144.326300@y42g2000hsy.googlegroups.com>
	<87k5r2zhd6.fsf@kip.sateh.com>
Message-ID: <1189319685.273092.31830@r34g2000hsd.googlegroups.com>

>   steps.sort(key = lambda s: s.time)
This is why attrgetter in the operator module was invented.
from operator import attrgetter
...
steps.sort(key=attrgettr("time"))

HTH,
--
Miki <miki.tebeka at gmail.com>
http://pythonwise.blogspot.com



From bignose+hates-spam at benfinney.id.au  Wed Sep 19 22:00:40 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 20 Sep 2007 12:00:40 +1000
Subject: super() doesn't get superclass
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au>
	<87k5qn5cwi.fsf@mulj.homelinux.net>
Message-ID: <87y7f2w0xj.fsf@benfinney.id.au>

Hrvoje Niksic <hniksic at xemacs.org> writes:

> Ben Finney <bignose+hates-spam at benfinney.id.au> writes:
> 
> > Evan is claiming that "the next class in the MRO _is_ a superclass",
> > apparently by his definition or some other that I've not seen.
> 
> The definition of superclass is not the issue, the issue is
> "superclass *of which class*"?  You expect super(A, self) to iterate
> only over superclasses of A, even when self is an instance of a
> subtype of A.

Yes. Those are the specific parameters to the function call, so that
*is* what I expect.

> What really happens is that super(A, self) yields the next method in
> type(self)'s MRO, which can and does cause include classes that are
> not by any definition superclasses of A.

Then the function is misnamed, and implies that it does the former
("You expect ...") above, instead of the latter ("What really happens
...").

In its latter form, it is worthless to me when I'm looking for "get
superclass of A", but its name and parameters and documentation all
lead me very strongly to believe otherwise.

-- 
 \             "I put contact lenses in my dog's eyes. They had little |
  `\   pictures of cats on them. Then I took one out and he ran around |
_o__)                                   in circles."  -- Steven Wright |
Ben Finney


From phil at freehackers.org  Mon Sep 17 04:41:59 2007
From: phil at freehackers.org (BlueBird)
Date: Mon, 17 Sep 2007 01:41:59 -0700
Subject: QPicture and Qpainter PyQt4
In-Reply-To: <1190014183.462244.135560@w3g2000hsg.googlegroups.com>
References: <1190014183.462244.135560@w3g2000hsg.googlegroups.com>
Message-ID: <1190018519.858640.100440@w3g2000hsg.googlegroups.com>


Hi,

It looks like you have several things wrong:

On Sep 17, 9:29 am, luca72 <lucabe... at libero.it> wrote:
> class Form(QWidget, Ui_Form):
>     [...]
>
>     @pyqtSignature("")
>     def on_pushButton_clicked(self):
>         """
>         Slot documentation goes here.
>         """
>         # TODO: not implemented yet
>         #raise "Not implemented yet"
>         #gr = QtGui.QPainter()
>         picture = QtGui.QPicture()
>         gr = QtGui.QPainter()
>         gr.begin(picture)
>         gr.setPen(QtGui.QPen(QtCore.Qt.black, 1, QtCore.Qt.SolidLine))
>         gr.drawLine(70,100,150,100)
>         gr.end()
>         picture.save('dis.pic')
>         self.frame.update()

Normally, you don't paint inside a slot. You paint inside the
paintEvent() method which is called automatically by Qt when an area
of your widget needs to be repainted.

> from PyQt4.QtGui import QWidget
> from PyQt4.QtCore import pyqtSignature
> from PyQt4 import *
>
> class PictureFrame(QtGui.QFrame):
>
>   def __init__(self, parent = None):
>     QFrame.__init__(self, parent)
>     picture = QtGui.QPicture()
>
>   def paintEvent(self, event):
>     picture.load('dis.pic')
>     gr = QtGui.QPainter()
>     gr.begin(self.frame)
>     gr.drawPicture(0, 0, picture)
>     gr.end()

Don't load a picture inside a paintevent. Loading is an expensive
process, you don't want to repeat it all the time.

Second, you should check that your picture was loaded. Sometimes, it's
a file problem. Check the size of your picture for example.

Third, I think you should have :
    gr.begin( self )

Else, the painter is not painting on your widget.

Hope that helps.

    PHilippe





From onurays23 at gmail.com  Sat Sep  1 20:44:21 2007
From: onurays23 at gmail.com (onurays)
Date: Sun, 2 Sep 2007 03:44:21 +0300
Subject: A big problem with _name_ ==  '_main_'
References: <fbd0g8$e3c$1@aioe.org>
Message-ID: <fbd110$f1c$1@aioe.org>

Oh, i solve the problem. It should be double underscore.. I am so 
careless..!

Onuray.

"onurays" <onurays23 at gmail.com>, haber iletisinde ?unlar? 
yazd?:fbd0g8$e3c$1 at aioe.org...
> Hi,
>
> I have begun to teach me Python today. The problem is :
>
>    NameError: name 'name' is not defined.
>
> I am using winXP and i used that:
>
>    if  _name_ == '_main_' :
>        MyClass()
>        gtk.main()
>
> Onuray.
> 




From fabioztessitore at libero.it  Mon Sep  3 12:02:08 2007
From: fabioztessitore at libero.it (Fabio Z Tessitore)
Date: 03 Sep 2007 16:02:08 GMT
Subject: How can I wait for all the threads I spawn for 5 minutes
References: <1188603646.671414.272760@w3g2000hsg.googlegroups.com>
Message-ID: <46dc3000$0$10623$4fafbaef@reader2.news.tin.it>

> [cut]
> But this code ends up waiting 5 minutes for **each** thread.  that is
> not what I want. I just want to wait for 5 minutes for all threads. how
> can I do that?

I've written a little code for you using threading. Hope it will help you:

#! /usr/bin/env python
# -*- coding: utf8 -*-

import threading
import time

class MyLittleThread(threading.Thread):

  def __init__(self):
    threading.Thread.__init__(self)
	
  def run(self):
    time.sleep(5)


if __name__ == "__main__":
  # create a list of 10 MyLittleThread
  # total time to wait is 5 sec (NOT 5sec*10)
  lt = []
  for i in range(10):
    lt.append(MyLittleThread())
	
  for th in lt:
    th.start()

bye


From wizzardx at gmail.com  Sat Sep  8 18:02:44 2007
From: wizzardx at gmail.com (David)
Date: Sun, 9 Sep 2007 00:02:44 +0200
Subject: How to insert in a string @ a index
In-Reply-To: <1189288040.775913.8090@g4g2000hsf.googlegroups.com>
References: <1189274564.462664.131240@22g2000hsm.googlegroups.com>
	<1189288040.775913.8090@g4g2000hsf.googlegroups.com>
Message-ID: <18c1e6480709081502i542be4dbv27d58e5cdd7f02ad@mail.gmail.com>

On 9/8/07, Zentrader <zentraders at gmail.com> wrote:
> Same solution as above, but if you just want "Hello" and to not
> include words containing "Hello", i.e. "Helloing" or "Unhello", then
> you want to include a leading and/or trailing space.

You can also use the re (regular expression) module to search for
"hello" and make sure it's a complete word. You would use re to search
for something like "\bhello\b". "\b" being regex for an empty string
that only occurs at the start or beginning of a word.

More information on python regexes here: http://www.amk.ca/python/howto/regex/

Here is an example from that page:

>>> p = re.compile(r'\bclass\b')
>>> print p.search('no class at all')
<re.MatchObject instance at 80c8f28>
>>> print p.search('the declassified algorithm')
None
>>> print p.search('one subclass is')
None


From steve at holdenweb.com  Tue Sep 11 14:50:42 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 11 Sep 2007 14:50:42 -0400
Subject: ValueError: insecure string pickle ?
In-Reply-To: <fc6bm9$jd6$1@news.albasani.net>
References: <fc6bm9$jd6$1@news.albasani.net>
Message-ID: <fc6o21$2ua$3@sea.gmane.org>

robert wrote:
> cPickle.loads  raised "ValueError: insecure string pickle".
> The error is from a log file and I cannot reproduce it (quickly). 
> What can be the cause for that error?
> 
> Robert

Make sure that your pickle files are being read and written in binary 
mode ("rb" and "wb" as the second argument to open()).

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From kyosohma at gmail.com  Thu Sep 13 10:23:53 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 13 Sep 2007 07:23:53 -0700
Subject: Help to start python
In-Reply-To: <1189693144.493878.130220@w3g2000hsg.googlegroups.com>
References: <1189693144.493878.130220@w3g2000hsg.googlegroups.com>
Message-ID: <1189693433.545822.89580@o80g2000hse.googlegroups.com>


python_lover wrote:
> Hi All,
>
> I'm new  to python. I installed python 2.5  and IDLE 1.2.1 . I'm able
> to run shell commands.
>
> But I don't know how to execute a python program using this. When I'm
> opeing a py program a seperate IDLE window opeing with program text.
> But I don't know to to execute the prg.
>
> Please help me on this .
>
> thank you
>
> regards
> Sat

When in IDLE, you can go to the Run menu and choose Run Module (or
press F5) in the window that has the program code.

Hope that helps!

Mike



From michele.simionato at gmail.com  Wed Sep 12 03:47:51 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Wed, 12 Sep 2007 07:47:51 -0000
Subject: An ordered dictionary for the Python library?
In-Reply-To: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
Message-ID: <1189583271.343615.305070@y42g2000hsy.googlegroups.com>

On Sep 12, 9:33 am, Mark Summerfield <m.n.summerfi... at googlemail.com>
wrote:
> I feel that Python lacks one useful data structure: an ordered
> dictionary.
>
> I find such data structures v. useful in C++. I know that in Python
> the sort function is v. fast, but often I prefer never to sort but
> simply to use an ordered data structure in the first place.
> (I'm aware that for ordered lists I can use the bisect module, but I
> want an ordered key-value data structure.)
>
> I think other people must find such things useful. There are three
> implementations on the Python Cookbook site, and one on PyPI, all in
> pure Python (plus I have my own implementation, also pure Python).
>
> I would suppose that it would be better if it was implemented in C---
> for example, my own pure Python ordered dict loads data about eight
> times slower than the built-in dict. Nonetheless, I still find it
> worth using for the convenience it offers.
>
> Do other Python programmers feel this lack? Is this worth a PEP?
>

Yes, this is a serious lack in the standard library.

         Michele Simionato



From gazelle at xmission.xmission.com  Sat Sep  1 10:49:14 2007
From: gazelle at xmission.xmission.com (Kenny McCormack)
Date: Sat, 1 Sep 2007 14:49:14 +0000 (UTC)
Subject: Important Research Project
References: <13ddcvm1bsu3s94@corp.supernews.com> <46D6CA0E.E66ED5C8@yahoo.com>
	<13deq9nj9atft62@corp.supernews.com>
	<lnsl60o492.fsf@nuthaus.mib.org>
Message-ID: <fbbu5a$a8v$1@news.xmission.com>

In article <lnsl60o492.fsf at nuthaus.mib.org>,
Keith Thompson  <kst-u at mib.org> wrote:
>"E.D.G." <edgrsprj at ix.netcom.com> writes:
>> "CBFalconer" <cbfalconer at yahoo.com> wrote in message
>> news:46D6CA0E.E66ED5C8 at yahoo.com...
>>> "E.D.G." wrote:
>>
>>> Where is Perl described in the C standard?  This seems rather OT.
>>
>> It has been my experience that a person who is an expert with one computer
>> language can usually do reasonably well when working with other languages.
>> I am trying to find some people who can assist with getting a Perl program
>> running.  It would probably be easier for expert programmers in any language
>> to help with this type of work compared with people such as myself who are
>> not experts in any programming language.
>
>CBFalconer's point is that this newsgroup (comp.lang.c, where he and I
>are both reading this) is for discussion of the C programming
>language.  If you want to discuss something other than C, please find
>another forum.  Massive cross-posts like this are rarely appropriate.

IOW (for the OP and for the various readers in all these groups):

	The rod up Keith's butt has a rod up its butt.

Note, incidentally, that this thread is yet the latest occurrence of a
phenomenon that I've observed many times in the past, and have
described here in clc on more than a few occasions.  That is, somebody
starts a thread, posted to several different groups, in the hope of
getting help from at least one of them.  The thread is pretty much
on-topic for most of the groups, primarily because the keepers of most
of the groups do not have rods up their butts.

However, and this is the big however, one of the groups listed just
happens to be clc, where rod-filled butts are the norm.  The result is
that all of the responses come from clc (including, of course, this one)
and, as we see, it's all topicality BS, and nobody ever ends up
discussing the original subject.   Really a pity, that.



From fredrik at pythonware.com  Wed Sep 26 12:06:45 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 26 Sep 2007 18:06:45 +0200
Subject: Asynchronous Messaging
In-Reply-To: <1190819912.344267.52680@50g2000hsm.googlegroups.com>
References: <1190807252.731074.141450@k79g2000hse.googlegroups.com>
	<1190819912.344267.52680@50g2000hsm.googlegroups.com>
Message-ID: <fde02l$t4$1@sea.gmane.org>

wink wrote:

> But its performance is poor if the number of items on a
> Queue becomes large because it is implemented using a list.

> One of the things I was thinking of was doing another implementation
> using of Queue which was based on deque.

Updating from 2.3 to something newer will fix that, of course:

$ more Queue.py

...

from collections import deque

...

class Queue:

     ...

     def _init(self, maxsize):
         self.maxsize = maxsize
         self.queue = deque()

</F>



From bj_666 at gmx.net  Thu Sep  6 03:47:04 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 6 Sep 2007 07:47:04 GMT
Subject: Using wild character
References: <1189054805.447871.213150@y42g2000hsy.googlegroups.com>
	<1189058095.671230.262190@o80g2000hse.googlegroups.com>
Message-ID: <5k9pjoF2mrncU1@mid.uni-berlin.de>

On Wed, 05 Sep 2007 22:54:55 -0700, TheFlyingDutchman wrote:

> To do a "*string" wildcard filter use the endswith() function instead
> of startswith() and to do a *string* type wildcard filter use
> the find() function > -1.

Maybe better the ``in`` operator for the '*string*' type.  `str.find()`
will go away in the future.

Ciao,
	Marc 'BlackJack' Rintsch


From mickey at disney.com  Tue Sep 11 18:47:43 2007
From: mickey at disney.com (Wiseman)
Date: Tue, 11 Sep 2007 18:47:43 -0400
Subject: Python Problem
References: <l404e316v2lknjsfrct9nlcs2jl9206qrf@4ax.com>
Message-ID: <pl6ee3hutvaf3s8399upqq4tap4bqn7r8m@4ax.com>


 Hi,

OK - it works in WindowsXP.
I installed "enchant" on my SuSE 10.0 (using YAST). 
The enchant Suse package looks like a general Linux package, not a
Python specific.

Running the program in Python I am getting the same error message from
the line: "import enchant".

ImportError: No module named enchant

What am I missing?

 Thanks

 ((:-()  Meir


>Hi,
>
>The line:
>
>import enchant
>
>works perfectly OK when I call a Python progrma (sp.py) from IDLE
>(WInXP). When I try to run it ftom the command line (python sp.py) the
>response is:
>
>Traceback (most recent call last):
>   File "sp.py", line 3, in <module>
>     import enchant
>ImportError: No module named enchant
>
>Searching my computer (the whole of drive c:\) I could not find ANY
>file called enchant.*.
>
>Does anyone know what is wrong?
>
>Thanks
>
>((:-()  Meir
>



From Graham.Dumpleton at gmail.com  Wed Sep 12 00:58:18 2007
From: Graham.Dumpleton at gmail.com (Graham Dumpleton)
Date: Wed, 12 Sep 2007 04:58:18 -0000
Subject: Python 3K or Python 2.9?
In-Reply-To: <87abrs7c6v.fsf@benfinney.id.au>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<7x7imwpn1u.fsf@ruckus.brouhaha.com>
	<87abrs7c6v.fsf@benfinney.id.au>
Message-ID: <1189573098.290501.72630@50g2000hsm.googlegroups.com>

On Sep 12, 2:14 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> Paul Rubin <http://phr... at NOSPAM.invalid> writes:
> > TheFlyingDutchman <zzbba... at aol.com> writes:
> > > Python user and advocate Bruce Eckel is disappointed with the
> > > additions (or lack of additions) in Python 3:
>
> > >http://www.artima.com/weblogs/viewpost.jsp?thread=214112
>
> > That article is pretty weak.
>
> It is responded to by Guido here:
>
>    "A Response to Bruce Eckel"
>     <URL:http://www.artima.com/weblogs/viewpost.jsp?thread=214325>

In that blog, Guido says:

"""Concurrency: It seems we're now happily out exploring here. I'm
looking forward to benchmarks showing that PP or similar (or
dissimilar!) solutions actually provide a performance gain. Another
route I'd like to see explored is integrating one such solution into
an existing web framework (or perhaps as WSGI middleware) so that web
applications have an easy way out without redesigning their
architecture."""

Maybe I don't fully understand where Guido is coming from, but
solutions for spreading web applications across multiple processes
have been available for a long time in solutions such as mod_python
and mod_fastcgi. With a view to improving further on these solutions
mod_wsgi has also been created.

All these solutions either use the multi process nature of the web
server, or themselves use multiple daemon processes to which requests
are distributed by Apache. End result is that one can make better use
of multi processor or multi core machines. Also, when using multi
threaded Apache worker MPM, because a lot of stuff is not even done in
Python code, such as static file serving, multiple cores can even be
used within the same process. Thus, in the larger context of how
Apache is implemented and what web applications provide, the GIL isn't
as big a problem as some like to believe it is as far as preventing
proper utilisation of the machines resources.

FWIW, I have blogged my own response to Guido's comment above at:

http://blog.dscpl.com.au/2007/09/parallel-python-discussion-and-modwsgi.html

Now over the years I have seen a lot of Python developers showing
quite a dislike for using Python integrated with Apache. As a result
the last thing people seem to want to do is fix such solutions up and
make them work better. Reality is though that unless a very good
solution for hosting Python with Apache comes up, you will probably
never see good cheap commodity web hosting for Python. Older solutions
simply aren't safe to use or are hard to set up and manage.

Creating lots of distinct Python processes and proxying to them, like
the purists would like to see, simply isn't going to happen as such
setups are too hard to manage and use up too much resources on a large
scale. Web hosting companies want something simple which they can
integrate into their existing PHP focused Apache installations and
which don't chew up huge amounts of additional resources, thereby
forcing a reduction in their site densities. To that end, we still
have a way to go.

An older blog entry of mine where I have covered these problems is:

http://blog.dscpl.com.au/2007/07/commodity-shared-hosting-and-modwsgi.html

Graham




From bj_666 at gmx.net  Sat Sep  8 02:27:44 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 8 Sep 2007 06:27:44 GMT
Subject: Speed of Python
References: <mailman.258.1189209238.2658.python-list@python.org>
Message-ID: <5ketn0F33dv5U1@mid.uni-berlin.de>

On Fri, 07 Sep 2007 23:53:48 +0000, wang frank wrote:

>>From: "Marc 'BlackJack' Rintsch" <bj_666 at gmx.net>
>>To: python-list at python.org
>>Subject: Re: Speed of Python
>>Date: 7 Sep 2007 23:17:55 GMT
>>
>>On Fri, 07 Sep 2007 22:59:26 +0000, wang frank wrote:
>>
>> > I also have tried to use numpy to speed it up. However, surprisingly, 
> it is
>> > slower than the pure python code.
>> >
>> > Here is the code:
>> > import  numpy
>> > arange=numpy.arange
>> > nlog=numpy.log
>> > def bench6(n):
>> > 	for i in xrange(n):
>> > 		for j in xrange(1000):
>> > 			m=j+1
>> > 			z=nlog(m)
>> > 			z1=nlog(m+1)
>> > 			z2=nlog(m+2)
>> > 			z3=nlog(m+3)
>> > 			z4=nlog(m+4)
>> > 			z5=nlog(m+5)
>> > 			z6=nlog(m+6)
>> > 			z7=nlog(m+7)
>> > 			z8=nlog(m+8)
>> > 			z9=nlog(m+9)
>> > 	return z9
>> >
>> > [??]
>> >
>> > Anyone know why?
>>
>>Because you don't really take advantage of `numpy`.  The `numpy.log()`
>>function can be used with scalars but I guess it is slower because it has
>>to check if its argument is a scalar or array.  Untested:
>>
>>from numpy import arange, log as nlog
>>
>>def bench6(n):
>>     for dummy in xrange(n):
>>         for j in xrange(1000):
>>             z = nlog(arange(j + 1, j + 11))
>>     return z[-1]
>
> I am just trying to compare the speed with matlab. The arrange is used for 
> another test, that is why it shows up in the mail.

I think I don't get what you are after.  If you want to compare the speed
of code that *calculates* the same values it doesn't have to *look* the
same.  So what's the point of importing `numpy` and its `log` function if
you don't write the code in a fashion that takes advantage of the package
at all!?

And the other "pure" Python versions may gain some speed if you think
Python and not Matlab with Python syntax.  That might look like this:

from math import log

def bench42(n):
    the_range = xrange(1, 1001)
    for dummy in xrange(n):
        for i in the_range:
            z = [log(x) for x in xrange(i, i + 10)]
    return z[-1]

Ciao,
	Marc 'BlackJack' Rintsch


From nebulous99 at gmail.com  Thu Sep 13 01:35:53 2007
From: nebulous99 at gmail.com (nebulous99 at gmail.com)
Date: Thu, 13 Sep 2007 05:35:53 -0000
Subject: Car-ac-systems
In-Reply-To: <BeqdnaFrktIgBHvbnZ2dnUVZ8v-dnZ2d@eclipse.net.uk>
References: <1189511932.371621.112970@o80g2000hse.googlegroups.com>
	<BeqdnaFrktIgBHvbnZ2dnUVZ8v-dnZ2d@eclipse.net.uk>
Message-ID: <1189661753.315182.53630@22g2000hsm.googlegroups.com>

On Sep 11, 9:35 am, "John Timney \(MVP\)"
<x_j... at timney.eclipse.co.uk> wrote:
> How do I control one with C# then!  Thats not on your site, clearly not
> everything I need to know then.  Waste of a site!

C# is just as off topic in comp.lang.java.programmer as car air-
conditioning systems. The latter, however, have the redeeming
characteristic that they are not the demonic spawn of evil Microsoft.



From ldo at geek-central.gen.new_zealand  Sat Sep  8 01:20:39 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 08 Sep 2007 17:20:39 +1200
Subject: exponential float formmating
References: <1189170499.945175.275210@57g2000hsv.googlegroups.com>
	<5kd2q6F31i6hU4@mid.uni-berlin.de>
	<1189174673.600550.288440@50g2000hsm.googlegroups.com>
Message-ID: <fbtbf7$nbh$4@lust.ihug.co.nz>

In message <1189174673.600550.288440 at 50g2000hsm.googlegroups.com>, 
zunbeltz at gmail.com wrote:

> In all cases I need the number to start with 0
> 0.13000E+01

So why not move the decimal point left one, and add one to the exponent.


From bj_666 at gmx.net  Thu Sep  6 04:07:24 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 6 Sep 2007 08:07:24 GMT
Subject: We need PIGs :)
References: <mailman.131.1188450658.28954.python-list@python.org>
	<46d74472$0$402$426a34cc@news.free.fr> <87hcm81dot.fsf@kip.sateh.com>
Message-ID: <5k9qpsF2mrncU3@mid.uni-berlin.de>

On Thu, 06 Sep 2007 09:00:02 +0200, Stefan Arentz wrote:

> What I find really frustrating in Python (combined with usually bad
> documentation) is that many people have different styles. The most
> frustratinng being getFoo() vs .foo, vs get_foo().

`getFoo()` is discouraged by PEP 8.  You don't have the choice between
`.foo` and `.get_foo()` in Java because Java has no properties and people
are trained to write getters and setters for everything.  I like that
choice in Python because I can write shorter code that is not cluttered
with very simple getters and setters.

Ciao,
	Marc 'BlackJack' Rintsch


From aahz at pythoncraft.com  Thu Sep 13 23:51:00 2007
From: aahz at pythoncraft.com (Aahz)
Date: 13 Sep 2007 20:51:00 -0700
Subject: Decimal formatting
References: <1189716651.810481.260850@y42g2000hsy.googlegroups.com>
	<1189717147.538624.189890@19g2000hsx.googlegroups.com>
Message-ID: <fcd0f4$hus$1@panix3.panix.com>

In article <1189717147.538624.189890 at 19g2000hsx.googlegroups.com>,
mensanator at aol.com <mensanator at aol.com> wrote:
>
>>>> a
>12.33333
>>>> print '%0.2f' % a
>12.33
>>>> a = 1
>>>> print '%0.2f' % a
>1.00

>>> '%.2f' % 1
'1.00'
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"Many customs in this life persist because they ease friction and promote
productivity as a result of universal agreement, and whether they are
precisely the optimal choices is much less important." --Henry Spencer
http://www.lysator.liu.se/c/ten-commandments.html


From kyosohma at gmail.com  Thu Sep 20 11:30:58 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 20 Sep 2007 15:30:58 -0000
Subject: Finding prime numbers
In-Reply-To: <mailman.779.1190226722.2658.python-list@python.org>
References: <1190218927.7991.25.camel@apprentice-laptop>
	<82b4f5810709190931u16ee0621xc6608d2bcb2fec5e@mail.gmail.com>
	<1190219929.7991.28.camel@apprentice-laptop>
	<2dc0c81b0709191013k181d1a74m76a08cecadb005c4@mail.gmail.com>
	<mailman.777.1190222135.2658.python-list@python.org>
	<1190225821.182650.227540@k79g2000hse.googlegroups.com>
	<mailman.779.1190226722.2658.python-list@python.org>
Message-ID: <1190302258.922419.113030@w3g2000hsg.googlegroups.com>

On Sep 19, 1:31 pm, "Shawn Milochik" <Sh... at Milochik.com> wrote:
> > If you'd just search the archives, you would have found this:
>
> >http://groups.google.com/group/comp.lang.python/browse_thread/thread/...
>
> Yeah, but that's no fun. ;o)

Yes! Never do what you can fool others into doing for you.

Mike



From bjorn.kempen at gmail.com  Sat Sep 15 18:06:17 2007
From: bjorn.kempen at gmail.com (buffi)
Date: Sat, 15 Sep 2007 22:06:17 -0000
Subject: Needless copying in iterations?
In-Reply-To: <fchk59$mm3$1@daisy.noc.ucla.edu>
References: <fchk59$mm3$1@daisy.noc.ucla.edu>
Message-ID: <1189893977.487320.231700@n39g2000hsh.googlegroups.com>

On Sep 15, 11:58 pm, James Stroud <jstr... at mbi.ucla.edu> wrote:
> Hello all,
>
> I was staring at a segment of code that looked like this today:
>
>     for something in stuff[x:y]:
>       whatever(something)
>
> and was wondering if the compiler really made a copy of the slice from
> stuff as the code seems to suggest, or does it find some way to produce
> an iterator without the need to make a copy (if stuff is a built-in
> sequence type)? Or would it be more efficient to do the more clumsy (in
> my opinion):
>
>     for i in xrange(x, y):
>       whatever(stuff[i])
>
> James

itertools.islice does what you want

import itertools
for something in itertools.islice(stuff, x, y):
      whatever(something)



From bbansi_1982 at yahoo.com  Wed Sep 26 03:34:42 2007
From: bbansi_1982 at yahoo.com (bbansi_1982 at yahoo.com)
Date: Wed, 26 Sep 2007 00:34:42 -0700
Subject: unable to load dco2 in python
Message-ID: <1190792082.126432.51360@n39g2000hsh.googlegroups.com>

Hi,
      I have built DCOracle2 with python. But when i
try to import dco2 inside python prompt it gives me
the error Failed to load dco2.sl although it has been
built properly  and dlopen is also able to load the
shared library without any unresolved symbols.
The machine details are as follows:
    Machine: HP-UX dafne B.11.23 U ia64
    Compiler: HP aC++/ANSI C B3910B A.06.05
    Python version: 2.4
    DCOracle2 version: 2-1.2
    Oracle version: Oracle10g

I am pasting the error that i am getting on my machine
below:

Python 2.4 (#4, Nov 16 2005, 09:24:18) [C] on hp-ux11
Type "help", "copyright", "credits" or "license" for
more information.
>>> import dco2
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ImportError: Failed to load dco2.sl

Please help me in resolving the same.

Thanks,
Anil



From python at hope.cz  Fri Sep 14 15:51:22 2007
From: python at hope.cz (Johny)
Date: Fri, 14 Sep 2007 12:51:22 -0700
Subject: Https conversation - debug?
Message-ID: <1189799482.314951.238470@r34g2000hsd.googlegroups.com>

Is there any good sniffer for https protocol?
How can be watched https conversation?

Thanks for reply
L.



From http  Sun Sep 23 15:31:51 2007
From: http (Paul Rubin)
Date: 23 Sep 2007 12:31:51 -0700
Subject: Untrusted python code
References: <pan.2007.09.23.17.44.53@gmail.com>
Message-ID: <7xwsuh9o0o.fsf@ruckus.brouhaha.com>

Thomas Dybdahl Ahle <lobais at gmail.com> writes:
> Hi, I have an application for which I want users to be able to make 
> themes.
> I've planed a rather advanced model (in xml), which gives themes the 
> option to redefine various drawing methods.
> Now I don't want those themes to be able to take over the current user, 
> but I'd still like the scripts to be able to import stuff like math.
> Is there a way to ensure no IO and other dangerous stuff is done?

No.  There used to be something called rexec/bastion but it was
removed because it was insecure.

You might look at http://webpy.org which is a web kit written in
Python, that has its own sandboxed interpreter for a Python-like
user templating language, for doing what you're doing. 

You could also consider using something like client side XSLT.


From steve at REMOVE-THIS-cybersource.com.au  Tue Sep  4 11:55:32 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Tue, 04 Sep 2007 15:55:32 -0000
Subject: parameter list notation
References: <1188882028.165803.316540@r34g2000hsd.googlegroups.com>
Message-ID: <13dqvvk42v5ujfd@corp.supernews.com>

On Mon, 03 Sep 2007 22:00:28 -0700, TheFlyingDutchman wrote:

> I am trying to use a database written in Python called buzhug.
> 
> In looking at some of the functions I see this prototype:
> 
>     def create(self,*fields,**kw):
> 
> I am not clear on what the * and the ** are for or what they represent.
> Or, what are they referred to as so I can do a query for information on
> them.

And yet you're making your own fork of Python.

Good luck with that! Do let us know how it works out for you.

For the record, your question is answered in the FAQ:
http://www.python.org/doc/faq/programming/

and in the tutorial:
http://docs.python.org/tut/node6.html



-- 
Steven.


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Sep  7 03:28:26 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 07 Sep 2007 09:28:26 +0200
Subject: why should I learn python
In-Reply-To: <1189126109.189507.150580@w3g2000hsg.googlegroups.com>
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
	<mailman.189.1189118213.2658.python-list@python.org>
	<87zlzzs9by.fsf@wilson.homeunix.com>
	<1189119676.239459.325280@w3g2000hsg.googlegroups.com>
	<1189126109.189507.150580@w3g2000hsg.googlegroups.com>
Message-ID: <46e0fd95$0$2273$426a74cc@news.free.fr>

TheFlyingDutchman a ?crit :
> On Sep 6, 4:01 pm, windandwaves <nfranc... at gmail.com> wrote:
(snip)
>> but because I am really not much of a
>> programmer, it is often too detailed for me).  I have limited time,
>> but it does sound like something to learn, just for fun and for
>> practical use.  How would you use it in a web development
>> environment?
> 
> Python can be used as an apache module called mod_python and also as a
> CGI language.

And also with fast-cgi, or wsgi, or as it's own HTTP server, etc...



From bdesth.quelquechose at free.quelquepart.fr  Sat Sep  8 12:52:20 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 08 Sep 2007 18:52:20 +0200
Subject: Enum class with ToString functionality
In-Reply-To: <1189425154.788466.132370@d55g2000hsg.googlegroups.com>
References: <1189416537.050002.61120@r34g2000hsd.googlegroups.com>
	<1189425154.788466.132370@d55g2000hsg.googlegroups.com>
Message-ID: <46e59bf7$0$21897$426a74cc@news.free.fr>

TheFlyingDutchman a ?crit :
> On Sep 10, 2:28 am, bg... at yahoo.com wrote:
> 
>>Hi,
>>
>>I have the following class -
>>
>>class TestOutcomes:
>>    PASSED = 0
>>    FAILED = 1
>>    ABORTED = 2
>>
>>plus the following code -
>>
>>testResult = TestOutcomes.PASSED
>>
>>testResultAsString
>>if  testResult == TestOutcomes.PASSED:
>>    testResultAsString = "Passed"
>>elif testResult == TestOutcomes.FAILED :
>>    testResultAsString = "Failed"
>>else:
>>    testResultAsString = "Aborted"
>>
>>But it would be much nicer if I had a function to covert to string as
>>part of the TestOutcomes class. How would I implement this?
>>
>>Thanks,
>>
>>Barry
> 
> 
> class TestOutcomes:
>     PASSED = 0
>     FAILED = 1
>     ABORTED = 2
> 
>     def ToString(outcome):
>         if  outcome == TestOutcomes.PASSED:
>            return "Passed"
>         elif outcome == TestOutcomes.FAILED :
>            return "Failed"
>         else:
>            return "Aborted"
> 
>     ToString = staticmethod(ToString)
> 
> if __name__ == "__main__":
>     testResult = TestOutcomes.PASSED
>     testResultAsString = TestOutcomes.ToString(testResult)
>     print testResultAsString
>     print TestOutcomes.ToString(testResult)
> 

Technically correct, but totally unpythonic.

May I suggest some reading ?
http://dirtsimple.org/2004/12/python-is-not-java.html


From news at sandipan.com  Sun Sep  2 12:14:03 2007
From: news at sandipan.com (Sandipan News)
Date: Sun, 2 Sep 2007 12:14:03 -0400
Subject: Pythonwin Install COM exceptions on Windows Vista Ultimate
In-Reply-To: <00a701c7eaa6$d13c01f0$73b405d0$@com>
References: <mailman.95.1188374497.28954.python-list@python.org>	<46d578dc$0$25911$ba4acef3@news.orange.fr>
	<00a701c7eaa6$d13c01f0$73b405d0$@com>
Message-ID: <000001c7ed7c$4a688580$df399080$@com>

Here are some steps I used to finally successfully install Python and
Pythonwin on Vista Ultimate:

1. Uninstalled Python (could not see a way to uninstall Pythonwin)
2. Installed Python again (.MSI does not provide option to run as
Administrator)
3. Rebooted computer
4. Installed Pythonwin with right click option "Run as Administrator" - This
was different from the last time I installed this.

Copied pythoncom25.dll to C:\Windows\system32\pythoncom25.dll
Copied pywintypes25.dll to C:\Windows\system32\pywintypes25.dll
Registered: Python.Interpreter 
Registered: Python.Dictionary 
Registered: Python 
-> Software\Python\PythonCore\2.5\Help[None]=None
-> Software\Python\PythonCore\2.5\Help\Pythonwin
Reference[None]='C:\\Python25\\Lib\\site-packages\\PyWin32.chm'
Shortcut for Pythonwin created
Shortcut to documentation created
The pywin32 extensions were successfully installed.

This time, no errors.

5. Started up a Python script from a directory using right-click | Open With
| Pythonwin.exe and it works fine.

Earlier it was giving an error about not being able to locate win32ui.pyd.

I did not touch UAC or Router/Rooter/Firewall ... I did not know how to.

Thanks.

Sandipan

-----Original Message-----
From: python-list-bounces+news=sandipan.com at python.org
[mailto:python-list-bounces+news=sandipan.com at python.org] On Behalf Of
Sandipan News
Sent: Wednesday, August 29, 2007 9:41 PM
To: 'M?ta-MCI (MVP)'; python-list at python.org
Subject: RE: Pythonwin Install COM exceptions on Windows Vista Ultimate

How do I deactivate UAC and Router?

I did run as Administrator and installed both Python and Pythonwin into
c:\Python25\

This is the error I got ...

Here is the log at the end of the install:

Copied pythoncom25.dll to C:\Outils\Python\pythoncom25.dll
Copied pywintypes25.dll to C:\Outils\Python\pywintypes25.dll
You do not have the permissions to install COM objects.
The sample COM objects were not registered.
-> Software\Python\PythonCore\2.5\Help[None]=None
-> Software\Python\PythonCore\2.5\Help\Pythonwin
Reference[None]='C:\\Outils\\Python\\Lib\\site-packages\\PyWin32.chm'
Creating directory C:\Outils\Python\Lib\site-packages\win32com\gen_py
Shortcut for Pythonwin created
Shortcut to documentation created
The pywin32 extensions were successfully installed.

Thanks.

Sandipan

-----Original Message-----
From: python-list-bounces+news=sandipan.com at python.org
[mailto:python-list-bounces+news=sandipan.com at python.org] On Behalf Of
M?ta-MCI (MVP)
Sent: Wednesday, August 29, 2007 9:19 AM
To: python-list at python.org
Subject: Re: Pythonwin Install COM exceptions on Windows Vista Ultimate

Hi!

Perso, on Vista, I :
  - deactive UAC
  - deactive firewall (I have a rooter)
  - run all like Administrator
  - install all in other DIR than "Program Files"

Result :  no problem.


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


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




From ldo at geek-central.gen.new_zealand  Sun Sep 23 22:43:56 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 24 Sep 2007 14:43:56 +1200
Subject: An Editor that Skips to the End of a Def
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87odfxjgjy.fsf@pobox.com> <fd033u$bnc$1@lust.ihug.co.nz>
	<3Md*NJqVr@news.chiark.greenend.org.uk>
	<m3hcll72wx.fsf@uriel.graune.org>
Message-ID: <fd789c$clc$1@lust.ihug.co.nz>

In message <m3hcll72wx.fsf at uriel.graune.org>, Manuel Graune wrote:

> Matthew Woodcraft <mattheww at chiark.greenend.org.uk> writes:
> 
>> Lawrence D'Oliveiro  <ldo at geek-central.gen.new_zealand> wrote:>
>>
>>> <http://www.asktog.com/SunWorldColumns/S02KeyboardVMouse3.html>
>>
> And "cursor keys"? Please, every self respecting editor has ways for
> moving around quite a bit more efficiently.
> 
> And on top of that a use case, which no one in his right mind would
> do this way. Accomplishing this task with search-and-replace would
> have taken about 10 seconds. With Mouse or Keyboard.

Just to reinforce the point that the above was in no way an artificial or
isolated case:

<http://www.asktog.com/TOI/toi06KeyboardVMouse1.html>
<http://www.asktog.com/TOI/toi22KeyboardVMouse2.html>


From aleax at mac.com  Mon Sep 10 01:11:09 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 9 Sep 2007 22:11:09 -0700
Subject: concise code (beginner)
References: <13dsvqrqivtf092@corp.supernews.com>
	<fbmrsg$dsi$1@daisy.noc.ucla.edu>
	<1189020188.842700.50950@d55g2000hsg.googlegroups.com>
	<fbn42h$k37$1@daisy.noc.ucla.edu>
	<1189108607.080926.103650@19g2000hsx.googlegroups.com>
	<1189183560.572177.56930@r34g2000hsd.googlegroups.com>
	<13e971s8qujjm3a@corp.supernews.com>
Message-ID: <1i471j8.dmtje2j20vraN%aleax@mac.com>

bambam <david at asdf.asdf> wrote:

> > O(n) to find the element you wish to remove and move over
> > everything after it,
> 
> Is that how lists are stored in cPython? It seems unlikely?

So-called "lists" in Python are stored contiguously in memory (more like
"vectors" in some other languages), so e.g. L[n] is O(1) [independent
from n] but removing an element is O(N) [as all following items need to
be shifted 1 place down].


Alex


From eduardo.padoan at gmail.com  Fri Sep 14 20:43:38 2007
From: eduardo.padoan at gmail.com (Eduardo O. Padoan)
Date: Fri, 14 Sep 2007 21:43:38 -0300
Subject: How to avoid overflow errors
In-Reply-To: <13em8vnr527rq20@corp.supernews.com>
References: <13em8vnr527rq20@corp.supernews.com>
Message-ID: <dea92f560709141743k53580a71vd705e0b3266edbd6@mail.gmail.com>

On 9/14/07, Steven D'Aprano <steve at remove-this-cybersource.com.au> wrote:
> I thought that overflow errors would be a thing of the past now that
> Python automatically converts ints to longs as needed. Unfortunately,
> that is not the case.
>
> >>> class MyInt(int):
> ...     pass
> ...
> >>> MyInt(sys.maxint)
> 2147483647
> >>> MyInt(sys.maxint+1)
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> OverflowError: long int too large to convert to int


Not totally unrelated, but in Py3k, as it seems, overflows are really
things of the past:


Python 3.0a1 (py3k:58061, Sep  9 2007, 13:18:37)
[GCC 4.1.3 20070831 (prerelease) (Ubuntu 4.1.2-16ubuntu1)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> class MyInt(int):
...     pass
...
>>> import sys
>>> MyInt(sys.maxint)
2147483647
>>> MyInt(sys.maxint+1)
2147483648


Thanks to your mail, only now I see how important this change
(int/liong unification) really is!


> How do I subclass int and/or long so that my class also auto-converts
> only when needed?

What about just subclassing long - is this not an option?


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


-- 
http://www.advogato.org/person/eopadoan/
Bookmarks: http://del.icio.us/edcrypt


From xah at xahlee.org  Tue Sep 11 23:41:28 2007
From: xah at xahlee.org (Xah Lee)
Date: Tue, 11 Sep 2007 20:41:28 -0700
Subject: need scsh in a wikip article
In-Reply-To: <1189563310.268611.4550@r34g2000hsd.googlegroups.com>
References: <1189563310.268611.4550@r34g2000hsd.googlegroups.com>
Message-ID: <1189568488.932657.129510@o80g2000hse.googlegroups.com>

On Sep 11, Xah Lee wrote:
i was browsinghttp://en.wikipedia.org/wiki/Comparison_of_computer_shells

quite fucking ridiculous that it contains Python shell and Ruby shell,
and, there's no mentioning of scsh.

Fuck the schemer morons.

someone please add scsh there.

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

2007-09-11, Addendum:

It should be noted, that ?Python shell? and ?Ruby shell? should be
removed from that page. Because, these are not command line interfaces
to a OS.

While, scsh, is designed, to be a shell in the traditional sense of
being a command line interface to OS (unixes).

Also note, from the perspective of sociology, that the fact Python and
Ruby langs are added to that page, is a indication of the
motherfucking computer language fanatism at play. If we were to
condone or further this enthusiasm, i suggest Commond Lispers, and
Emacs lispers, also added a CL Shell and Emacs Lisp shell to that
page, since for all practical purposes, these langs provide the same
interactive facilities as Python and Ruby. Also, Haskell enthus should
add Haskell shell there too.

Also note, such fanatical bias are exhibited in severe degrees in
respective language's articles in wikipedia, in particular: the
article on Python and Perl. (and undoubtly others too in various
degrees but these 2 in particular i personally know well) To actually
fix these articles to rid of bias, marketing, fanatism, is nigh
impossible due to the nature of wikipedia and the army of respective
lang's advocates. The inaccuracy and warring nature, is analogous to
controversial articles on wikip, and perhaps it would fix itself over
the years as wikipedia have matured in incredible ways in the mere few
years in the past. However, the article on comparison of shell as
cited in the above, could probably be fixed now without reaching a
impasse or war, since the article contains multitudes of shells/langs
(thus in not horded by one exclusive army faction), and the factual
error of Python/Ruby there is relatively plain.

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



From martin at v.loewis.de  Sat Sep  1 02:25:25 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 01 Sep 2007 08:25:25 +0200
Subject: How to find out if the interpreter is a debug build?
In-Reply-To: <1188609417.273513.74450@i13g2000prf.googlegroups.com>
References: <1188609417.273513.74450@i13g2000prf.googlegroups.com>
Message-ID: <46d905d5$0$26151$9b622d9e@news.freenet.de>

llothar schrieb:
> How can i find out if a selected python interpreter  (i only know the
> path name under which i should start it) is a debug build?  I tried
> 
> sys.api_version, sys.platform, sys.version, sys.version_info
> 
> and there is no difference between  "python.exe" and "python_d.exe".

Sure there is:

if sys.executable.endswith("_d.exe"):
  print "Debug version"

If relying on the executable name is too unsafe, you can also look
at imp.get_suffixes(), which includes "_d.pyd" in a debug build on
Windows.

If you want it cross-platform, you can check whether sys.getobjects
is available. That, of course, is also unsafe because there isn't
a single "debug build" on Unix, but instead, several debugging
features can be enabled and disabled separately, so you would have
to specify first what precisely a debug build is.

Regards,
Martin


From kyosohma at gmail.com  Wed Sep 12 09:10:07 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 12 Sep 2007 13:10:07 -0000
Subject: Is the wxPython list down?
Message-ID: <1189602607.803546.180320@w3g2000hsg.googlegroups.com>

Hi,

Does anyone know if the wxPython mailing list is having issues? I
subscribe to it and haven't seen anything come through since
09/06/2007. I went to ActiveState's archives and the last message
there is from the 7th (http://aspn.activestate.com/ASPN/Mail/Browse/
Threaded/wxPython-users).

Thanks,

Mike



From jcd at sdf.lonestar.org  Wed Sep 12 11:20:01 2007
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Wed, 12 Sep 2007 11:20:01 -0400
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <1189608231.151112.147550@y42g2000hsy.googlegroups.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189604018.520338.162520@57g2000hsv.googlegroups.com>
	<46e7f450$0$12305$426a74cc@news.free.fr>
	<1189608231.151112.147550@y42g2000hsy.googlegroups.com>
Message-ID: <20070912152001.GA20494@sdf.lonestar.org>

On Wed, Sep 12, 2007 at 07:43:51AM -0700, Charles Fox wrote regarding Re: newbie: self.member syntax seems /really/ annoying:
> 
> Thanks guys -- yeah these two stategies (short s.varname; and explicit
> rescoping, a=self.a etc) are more or less what I was using.  That's
> still kind of annoying though.
> 
> The s.varname approach still makes numerical code much harder to read.
> 

For what it's worth, if you stick with python for a while, you will stop noticing the self, and be able to see what you're looking for quite clearly.  

Moreso if you use s.

Cheers,
Cliff


From jwrweatherley at gmail.com  Mon Sep  3 09:39:46 2007
From: jwrweatherley at gmail.com (jwrweatherley at gmail.com)
Date: Mon, 03 Sep 2007 06:39:46 -0700
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
In-Reply-To: <7x4picthpb.fsf@ruckus.brouhaha.com>
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
	<1188735642.391419.103650@19g2000hsx.googlegroups.com>
	<1188740716.423349.304370@y42g2000hsy.googlegroups.com>
	<1188743299.664137.194760@d55g2000hsg.googlegroups.com>
	<46daeaec$0$19889$426a74cc@news.free.fr>
	<46DB04DD.80801@v.loewis.de>
	<46db085d$0$16113$9b4e6d93@newsspool1.arcor-online.net>
	<13dmctogeh19410@corp.supernews.com>
	<7x4picthpb.fsf@ruckus.brouhaha.com>
Message-ID: <1188826786.674057.158020@d55g2000hsg.googlegroups.com>

Thanks for all the answers to my question. I think what I need to take
away from this is that xrange is an object - I thought it was just
some loop construct, and that maths is slow in python - so avoid
pathological looping.I remember the first time I tried Objective-C on
OS X I used the NSNumber class for arithmetic - the results that time
were pretty awful too!




From KingShivan at gmail.com  Fri Sep  7 21:51:34 2007
From: KingShivan at gmail.com (KingShivan at gmail.com)
Date: Fri, 07 Sep 2007 18:51:34 -0700
Subject: subprocess.communicate messes things up
Message-ID: <1189216294.958415.289400@r29g2000hsg.googlegroups.com>

please could you take a look at this piece of code ?

what I'd like is typically a sound boc : press one key, and get the
associated sound.
for this I place the sound files in different directories (easy to
move and modify) and when a key is pressed I grab the first file of
the corresponding directory.

problem is that the first time I press a key, it works, but after it
just print the keys I press, the annoying line being the one with
communicate, any idea of what is happening ?

thank you for reading

import os,subprocess, tty, termios,sys,time
FNULL = open('/dev/null', 'w')
def getkey():
        file = sys.stdin.fileno()
        mode = termios.tcgetattr(file)
        try:
            tty.setraw(file, termios.TCSANOW)
            ch = sys.stdin.read(1)
        finally:
            termios.tcsetattr(file, termios.TCSANOW, mode)
        return ch

def main():
	child1 = subprocess.Popen("/usr/bin/mplayer -slave -quiet -
idle",stdin=subprocess.PIPE,stdout=FNULL,stderr=FNULL,shell=True)
	while 1:
		ch=getkey()
		name=os.listdir("/home/shivan/"+ch)
		file_to_load = "/home/shivan/"+ch+"/"+name[0]
		print "loadfile "+file_to_load
		output, errors = child1.communicate("loadfile "+file_to_load+" \n")



main()



From jstroud at mbi.ucla.edu  Wed Sep 26 15:28:51 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 26 Sep 2007 12:28:51 -0700
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <1190829592.800804.242260@50g2000hsm.googlegroups.com>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190829592.800804.242260@50g2000hsm.googlegroups.com>
Message-ID: <fdebrf$chm$1@daisy.noc.ucla.edu>

Raymond Hettinger wrote:
> As one who was submitted many PEPs, I can advise that the quickest way
> to irrevocably kill an idea is to submit a PEP to early (we almost
> didn't get genexps because the PEP was submitted pre-maturely).

Maybe its the PEP killers who act prematurely because I friggin' love 
genexps and the little generators they generate. LC can be crude by 
comparison and is usually the construct that requires a compelling 
reason for usage.

James


From edgrsprj at ix.netcom.com  Sat Sep  1 00:13:27 2007
From: edgrsprj at ix.netcom.com (E.D.G.)
Date: Fri, 31 Aug 2007 22:13:27 -0600
Subject: Important Research Project
References: <13ddcvm1bsu3s94@corp.supernews.com>
Message-ID: <13dhm7uec5sp855@corp.supernews.com>

"E.D.G." <edgrsprj at ix.netcom.com> wrote in message
news:13ddcvm1bsu3s94 at corp.supernews.com...
> Important Research Project  (Related to computer programming)
>
> Posted by E.D.G. on August 30, 2007 edgrsprj at ix.netcom.com

    This effort was not successful.  And I am returning to trying to slowly
make progress with the computer program I have been developing.

    I was hoping that there might be some people who had Perl chart and .exe
generation programs running on their own computer who could say, "Here is
how to merge them with Perl; here is how to use them; this is what they will
do, etc."  Or, I was hoping that someone would respond and say that although
they are using Fortran or Basic etc. instead of Perl, they would be
interested in getting a copy of Perl running, determine how to get those
routines running, and then pass along the information.  That would have
saved some time.

    I work on these projects all the time.  And it has been my experience
that the world of science does not have the type of organized structure at
this time to enable people to easily obtain that type of assistance.  I have
established an organization which will hopefully help with that problem.  It
might be going public at a Web site some time in the next year.

There were some questions regarding the computer program I discussed.  This
is what it does:

    It provides researchers with the a certain amount of ability to
determine if different events are somehow linked with one another.  For
example, it can be used to compare two or more earthquakes, earthquakes and
electromagnetic pulses, tornados and electromagnetic pulses, and even
earthquakes and tornados etc.

    It makes it possible for people to study events taking place deep in the
Earth by evaluating electromagnetic pulse data associated with those events.
Under the right conditions it can be used to forecast earthquakes.  That is
the reason it was developed in the first place.  You can see the type of
data it generates at the following Web page:

http://www.freewebz.com/eq-forecasting/Data.html

    The plan is that when it has chart and standalone .exe program file
generation capabilities, program copies will be circulated within the
earthquake forecasting community in the People's Republic of China.  It was
discussed in detail there at a scientific conference in December of 2003.
At that time it was too complex for widespread use.

    After the chart feature becomes operational etc. I am also planning to
contact U.S. government officials to see if one or more lectures can be
organized regarding the basic technology and theories, and the program's
capabilities.

These are personal opinions.




From http  Sat Sep  8 23:33:57 2007
From: http (Paul Rubin)
Date: 08 Sep 2007 20:33:57 -0700
Subject: Does shuffle() produce uniform result ?
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
	<mailman.243.1187955760.32294.python-list@python.org>
	<tooru_honda-7C82D1.10432725082007@wvnews01.netvigator.com>
	<tooru_honda-58C552.20355225082007@wvnews01.netvigator.com>
	<tooru_honda-978B9E.11304526082007@wvnews01.netvigator.com>
	<slrnfdnojg.inr.apardon@rcpc42.vub.ac.be>
	<7xejhfbsjo.fsf@ruckus.brouhaha.com>
	<slrnfdpup6.inr.apardon@rcpc42.vub.ac.be>
	<7xabs39bin.fsf@ruckus.brouhaha.com>
	<13drijhfqlvlk96@corp.supernews.com> <fbvmg0$1p3$3@lust.ihug.co.nz>
Message-ID: <7xhcm4pl5m.fsf@ruckus.brouhaha.com>

Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> writes:
> Except that the NSA's reputation has taken a dent since they failed to
> anticipate the attacks on MD5 and SHA-1.

NSA had nothing to do with MD5, and it's to NSA's credit that SHA-1
held up for as long as it did.


From bj_666 at gmx.net  Sat Sep 15 07:59:26 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 15 Sep 2007 11:59:26 GMT
Subject: int('\x23') != 0x23 (a.k.a convert char to integer of its byte
	representation)
References: <1189857328.342615.105660@g4g2000hsf.googlegroups.com>
Message-ID: <5l1vouF5umvcU1@mid.uni-berlin.de>

On Sat, 15 Sep 2007 11:55:28 +0000, Boris Du?ek wrote:

> I am looking for the best way to convert a string of length 1 (= 1
> character as string) to integer that has the same value as numeric
> representation of that character. Background: I am writing functions
> abstracting endianness, e.g. converting a string of length 4 to the
> appropriate integer value (e.g. '\x01\x00\x00\x00' = 2**24 for big
> endian memory, 2**0 for little endian memory). For this, I need to
> know the numeric value of each byte and sum them according to
> endianness.

So you are looking for the `struct` module in the standard library instead
of doing this yourself.  :-)

If you insist on doing it yourself take a look at the built-in `ord()`
function.

Ciao,
	Marc 'BlackJack' Rintsch


From aafshar at gmail.com  Tue Sep  4 10:30:37 2007
From: aafshar at gmail.com (Ali)
Date: Tue, 04 Sep 2007 07:30:37 -0700
Subject: problem with TreeView + ListStore
In-Reply-To: <mailman.18.1188899004.2658.python-list@python.org>
References: <mailman.18.1188899004.2658.python-list@python.org>
Message-ID: <1188916237.284124.323320@o80g2000hse.googlegroups.com>

On Sep 4, 10:43 am, Guillermo Heizenreder <ghe... at gmail.com> wrote:
> Hi list
> I'm developing a application for learn pygkt, and I need to know when a
> user selected or clicked one determinate row of my TreeView for shot
> another signal .

Hi,

Well, ignoring the rest of the post, I can tell you that the usual way
of
doing this is to connect the changed signal of the treeview's
selection.

This explains it better than I would:

http://faq.pygtk.org/index.py?req=show&file=faq13.011.htp

Now to complete your actual use case:

def on_selection_changed(selection, *args):
     model, paths = selection.get_selected_rows()
     if paths:
        hbox.show()

treeView = gtk.TreeView()
selection = self.treeView.get_selection()
selection.connect('changed', on_selection_changed)

There are some situations where you may want to actually connect the
mouse click event, and we can discuss them further if you require.

I should of course mention kiwi.ui.objectlist.ObjectList. It is an
easier to use abstraction over TreeView, and has helped me in every
situation where I would use a TreeView.


Ali

> Study the tutorial [1] I began to see the explanation that I see in the
> chapter 14.7. TreeView Signal and found one in particular
> "select-cursor-row", but I don't understood  how implementing.
>
> Something like that.
>    if user_selected_row:
>       self.hbox_118.show()
>       print "YES"
>
> NOTE: self.hbox_118 = wTree.get_widget("hbox118")
>
> Thank and Regard
>
> [1]http://www.pygtk.org/pygtk2tutorial/sec-TreeViewSignals.html
>
> P/D: my English it to bad, I'm a novice.
> --
> Heizenreder Guillermohttp://code.google.com/u/gheize/




From zentraders at gmail.com  Sat Sep  8 17:47:20 2007
From: zentraders at gmail.com (Zentrader)
Date: Sat, 08 Sep 2007 14:47:20 -0700
Subject: How to insert in a string @ a index
In-Reply-To: <1189274564.462664.131240@22g2000hsm.googlegroups.com>
References: <1189274564.462664.131240@22g2000hsm.googlegroups.com>
Message-ID: <1189288040.775913.8090@g4g2000hsf.googlegroups.com>

Same solution as above, but if you just want "Hello" and to not
include words containing "Hello", i.e. "Helloing" or "Unhello", then
you want to include a leading and/or trailing space.

lit=" hello"  ## note added space
t1="nothello world hello. hello \nwhy world hello"
start = t1.find(lit)
t2 = t1[:start+1] + " XYZ" + t1[start+1:]
print "t1 =", t1
print "t2 =", t2
start = t2.rfind(lit)
t3 = t2[:start+1] + " XYZ" + t2[start+1:]
print "t3 =", t3



From rrr at ronadam.com  Sun Sep 23 19:34:20 2007
From: rrr at ronadam.com (Ron Adam)
Date: Sun, 23 Sep 2007 18:34:20 -0500
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <13fdmdmsaasak91@corp.supernews.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>	<mailman.900.1190414696.2658.python-list@python.org>	<1190415741.380795.259050@y42g2000hsy.googlegroups.com>	<13f8unjjeqs5p97@corp.supernews.com>	<mailman.916.1190444594.2658.python-list@python.org>	<13faa66cb1phre1@corp.supernews.com>	<mailman.936.1190535220.2658.python-list@python.org>
	<13fdmdmsaasak91@corp.supernews.com>
Message-ID: <46F6F7FC.1050208@ronadam.com>



Scott David Daniels wrote:
> Ron Adam wrote:
>> Scott David Daniels wrote:
>>> Ron Adam wrote:
>>>> .... How about this?
>>>> def integrate(fn, x1, x2, n=100):...
>>> The point was a pedagogic suggestion, ... 
>> I understood your point.  I just found it interesting since I've been 
>> trying to extend my math (for use with python) skills in this area.
> 
> Ah, sorry.  I had realized I wasn't explicit in my first message.

Yes, I wasn't trying to correct you.  I'm sorry if it came across that way.


> Yes, a perfectly fine integration.

There's still something about it that bothers me.  I think it may be the 
n=100 rather than delta='.0001', or some other way to specify the minimal 
error.  (Yes, it's a bit off topic.)


> You can then (and this is a major jump to get used to):
>      import functools
> 
>      Sine = functools.partial(integrate, math.cos, 0.0, n=100)

I haven't played around with .partial yet.  I wonder if it could be used in 
dispatching situations where the function signatures differ?


> Similarly, you can define a derivative that will behave fairly well,
> all without examining the definition of the function being operated
> upon.

I'll get around to doing that at some point. ;-)


I also have a class that solves equations that takes a function in a 
similar way.  It uses the same method used by HP calculators to solve TVM 
equations.

Cheers,
    Ron




From steve at REMOVE-THIS-cybersource.com.au  Sat Sep 15 20:56:15 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sun, 16 Sep 2007 00:56:15 -0000
Subject: How to avoid overflow errors
References: <13em8vnr527rq20@corp.supernews.com>
	<fcfbj0$br$1@daisy.noc.ucla.edu> <13emslk6n80mmf6@corp.supernews.com>
	<WKNGi.4471$7P7.3085@newssvr19.news.prodigy.net>
Message-ID: <13eovpf7ongmrda@corp.supernews.com>

On Sat, 15 Sep 2007 02:45:10 -0700, James Stroud wrote:

> Steven D'Aprano wrote:
>> On Fri, 14 Sep 2007 18:19:45 -0700, James Stroud wrote:
>> 
>>>> How do I subclass int and/or long so that my class also auto-converts
>>>> only when needed?
>>>>
>>> Use __new__.
>> 
>> The disadvantage of that is that your example code requires me to
>> duplicate my methods in the long version and the int version. It's easy
>> enough to work around that (class factory function) but it just seems
>> all rather untidy...
> 
> 
> The __new__ method is where you implement such decisions. There is no
> "tidier" way for one class "auto-convert" to another class, which is
> what you asked for (it says so right up there ^). So, if you don't like
> the answer, don't ask the question.

How am I supposed to know if I will like the answer until I ask the 
question? If I knew the answer I wouldn't need to ask the question.

Anyway, don't be so cranky and defensive. I was just pointing out that 
having to duplicate code between two different classes was untidy, not 
that __new__ is untidy. I thought that maybe I could inherit from both 
long and int, but Python doesn't like that:

TypeError: Error when calling the metaclass bases
    multiple bases have instance lay-out conflict



> The way to avoid duplicating methods (which is what you are asking for,
> no?) while still allowing your classes to maintain their identities is
> by using mixins:

[snip code]

I've never come to grips with mixins. It's probably high time I do.

Thanks for the example.


-- 
Steven.


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Sep 12 03:50:13 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 12 Sep 2007 09:50:13 +0200
Subject: __getattr__ and static vs. instantiated
In-Reply-To: <1189554607.559487.224410@b32g2000prf.googlegroups.com>
References: <1189554607.559487.224410@b32g2000prf.googlegroups.com>
Message-ID: <46e79a2f$0$28082$426a74cc@news.free.fr>

tvaughan a ?crit :
> Hi,
> 
> Let's say I have:
> 
> class Persistable(object):
> 
>         __attrs__ = {}
> 
>         def __getattr__(self, name):
>                 if name in self.__attrs__:
>                         return self.__attrs__[name]['value']
>                 else:
>                         return Object.__getattr__(self, name)
> 
>         def __setattr__(self, name, value):
>                 if name in self.__attrs__:
>                         self.__attrs__[name]['value'] = value
>                 else:
>                         Object.__setattr__(self, name, value)
> 
> And the I have:
> 
> class Person(Persistable):
> 
>         __storm_table__ = 'person'
> 
>         id = Int(primary=True)
> 
>         __attrs__ = {
>                 'name': {
>                         'lang': 'en',
>                         'value': Unicode(),
>                 },
>         }
> 
>         def __init__(self):
>                 self.id = int(random.random() * 1000)
> 
> I can do this:
> 
> person = Person()
> person.name = 'Jane Smith'
> 
> But I cannot do:
> 
> Person.name = 'Jane Smith'

yes, you can. But it won't do the same thing.

> or use Person.name in a Storm query like:
> 
> Person.name == 'Jane Smith'

It will obviously raise an AttributeError if the class Person doesn't 
have a 'name' attribute.

> __getattr__ is only called when using an instantiated class,

A class's '__getattr__' method is only triggered when looking up 
attributes on an instance of the class, yes.

> and
> never, it seems, in a static case. Why? How do I work around this?

Since classes are instances of their type, the obvious solution would be 
to define a custom metaclass implementing __getattr__. I didn't try, but 
it might work.

Now is this the best thing to do is another question. You seems not to 
be aware of the descriptor protocol - which is used to implement methods 
and properties. This lets you define 'smart' attributes. You'll find 
relevant documentation here:
http://docs.python.org/ref/descriptors.html
and here:
http://users.rcn.com/python/download/Descriptor.htm


Also, you seem to be trying to roll your own ORM. There are already 
quite a few existing ones - SQLAlchemy being probably the best one 
already, and also a good base (no pun) for building your own solutions.

HTH


From gnn at neville-neil.com  Sat Sep 22 14:06:38 2007
From: gnn at neville-neil.com (George V. Neville-Neil)
Date: Sat, 22 Sep 2007 19:06:38 +0100
Subject: Properties and Objects...
Message-ID: <m24phm7exd.wl%gnn@neville-neil.com>

I have been reading the mailing list and I am unfortunately going to
open up discussion I've seen twice in the last two years but which
still bugs me, so please accept my apologies in advance.

I have been working on a set of modules that make objects which look
like network packets (http://pcs.sf.net) in that you can set up a
class, say ipv4, which when instantiated has the following properties:

>>> from pcs.packets.ipv4 import *
>>> ip = ipv4()
>>> ip.bytes
'@\x00\x00\x00\x00\x00\x00\x00@\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
>>> ip.ttl
64
>>> ip.ttl=32
>>> ip.bytes
'@\x00\x00\x00\x00\x00\x00\x00 \x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
>>> 

Note that setting the ttl in the packet changes the underlying bytes.
Doing this makes writing network tests, and other networking code,
extremely easy.

This is done by having Field classes which are collected into a list
in a Packet class (the layout) and by doing special setattr/getattr
calls.

I have been trying to switch this over to using properties, which seem
at first glance to be cleaner, but which I am having a lot of problems
with.  In particular I want to add a property to an object, not a
class.  The field list in a class is actually relatively static but I
wind up with ugly code like:

class ethernet(pcs.Packet):
    """Ethernet"""
    __layout__ = pcs.Layout()
    _map = ethernet_map.map
    
    src = pcs.StringField("src", 48)
    dst = pcs.StringField("dst", 48)
    type = pcs.Field("type", 16)

    def __init__(self, bytes = None, timestamp = None):
        """initialize an ethernet packet"""

        src = pcs.StringField("src", 48)
        dst = pcs.StringField("dst", 48)
        type = pcs.Field("type", 16)

        pcs.Packet.__init__(self, [dst, src, type], bytes = bytes)
        self.description = inspect.getdoc(self)

and assigning the properties at class time means that it's hard to
have variations, packets with the same name but with slightly varying
field lists.

So, is there a way to assign a property to an object, like this:

    def __init__(....
         self.src = property()

or something like that?

And, failing that, is there a clean way to modify the class in it's
__init__() method so I don't have to call the Field objects twice,
once for the property effect and once to put into the list in the base
Packet class?

With my somewhat convoluted setattr/getattr implementation the
Ethernet class looked like this:

class ethernet(pcs.Packet):
    """Ethernet"""
    __layout__ = pcs.Layout()
    _map = ethernet_map.map
    
    def __init__(self, bytes = None, timestamp = None):
        """initialize an ethernet packet"""

        src = pcs.StringField("src", 48)
        dst = pcs.StringField("dst", 48)
        type = pcs.Field("type", 16)

        pcs.Packet.__init__(self, [dst, src, type], bytes = bytes)
        self.description = inspect.getdoc(self)

which was much more straightforward for someone to understand and to
code.  Since one of the project goals is to have the creation of new
packets classes be as easy as possible I would like to be able to do
something closer to the above.

Best,
George


From paul at boddie.org.uk  Wed Sep 26 06:28:46 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Wed, 26 Sep 2007 03:28:46 -0700
Subject: setuptools without unexpected downloads
In-Reply-To: <5lumarFae888U1@mid.uni-berlin.de>
References: <87ejgmklep.fsf@benfinney.id.au><878x6ukkvq.fsf@benfinney.id.au>
	<5luhb0Faal8aU1@mid.uni-berlin.de> <874phhlupi.fsf@benfinney.id.au>
	<5lumarFae888U1@mid.uni-berlin.de>
Message-ID: <1190802526.695391.326220@n39g2000hsh.googlegroups.com>

On 26 Sep, 11:16, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>
> Generally speaking, I think the real problem here is the clash
> between "cultures" of dependency-handling. But it's certainly beyond
> setuptools scope to cope with every imaginable package management system
> out there, and provide means to trigger an installation of say e.g. debian
> packages that are needed.

If you look at PEP 345...

http://www.python.org/dev/peps/pep-0345/

...you'll see that the dependency information described is quite close
to how such information is represented in Debian packages and with
other dependency management systems. This isn't an accident because
the authors were surely already familiar with such representations,
which have been around for quite some time. Admittedly, it isn't easy
to make a system which observes the rules of all the different
existing systems; for example, can .deb metadata and .rpm metadata be
interpreted in the same way and be taken to mean the same thing?
However, the argument that a dependency manager cannot deal with
different system packages is a weak one: apt and Smart have shown that
dependency management can be decoupled from package management.

Of course, I've already pointed out that despite being written in
Python, there's apparently no interest in the setuptools community to
look at what Smart manages to do, mostly due to spurious licensing
"concerns", and there's always the "argument zero" from people who
choose to ignore existing dependency management solutions: that
Windows doesn't provide such solutions - which is apparently not
entirely true, either.

[...]

> For example - what if there is no debian package that provides module XY in
> the required version? Do you rather install it into the global
> site-packages, or do you rather keep it private to the program requiring
> it? I'd say the latter is better in mostly all circumstances, as it will
> not disrupt the workings of other programs/modules.

For what it's worth, it is possible to use Debian dependency/package
management as a non-root user with a local site-packages directory,
but it isn't particularly elegant. See this proof of concept for
details:

http://www.boddie.org.uk/paul/userinstall.html

It's a fairly heavy solution which installs a lot of the
administrative toolchain just for local package installations, but you
do get dependency integration with the packages providing the
libraries that may be required by various Python extension modules.

Paul



From skulka3 at gmail.com  Thu Sep 27 12:45:24 2007
From: skulka3 at gmail.com (skulka3 at gmail.com)
Date: Thu, 27 Sep 2007 16:45:24 -0000
Subject: True of False
In-Reply-To: <1190910814.594559.30880@n39g2000hsh.googlegroups.com>
References: <1190910814.594559.30880@n39g2000hsh.googlegroups.com>
Message-ID: <1190911524.400966.101550@n39g2000hsh.googlegroups.com>

On Sep 27, 11:33 am, kou... at hotmail.com wrote:
> I tried writing a true and false If statement and didn't get
> anything?  I read some previous posts, but I must be missing
> something.  I just tried something easy:
>
> a = ["a", "b", "c", "d", "e", "f"]
>
> if "c" in a == True:
>      Print "Yes"
>
> When I run this, it runs, but nothing prints.  What am I doing wrong?
> Thanks.
>
> Kou

,
You may want to include paren around ("c" in a) and a lower case p for
Print, i.e. print, and  it should work

so eg:
a = ["a", "b", "c", "d", "e", "f"]

 if ("c" in a) == True:
      print "Yes"



From steve at holdenweb.com  Thu Sep 27 16:00:33 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 27 Sep 2007 16:00:33 -0400
Subject: ValueError: too many values to unpack,>>>
In-Reply-To: <46FC0244.4010803@comcast.net>
References: <mailman.1169.1190911027.2658.python-list@python.org>	<5m24sfFatlbuU1@mid.uni-berlin.de>	<46FBED79.6070207@comcast.net>	<fdgs2t$8ni$1@sea.gmane.org>
	<46FC0244.4010803@comcast.net>
Message-ID: <fdh251$tdr$1@sea.gmane.org>

Shawn Minisall wrote:
> Fredrik Lundh wrote:
>> Shawn Minisall wrote:
>>
>>   
>>> Sorry, it looks like it's on the fourth line with the 3 values on line 
>>> 4...its reading line 3 fine
>>>
>>> Traceback (most recent call last):
>>>   File "<pyshell#0>", line 1, in <module>
>>>     main()
>>>   File "I:\COMPUTER PROGRAMMING CLASS\PROJECT #1\project1.py", line 33, 
>>> in main
>>>     deposit1, deposit2, deposit3 = string.split(line, "\t")
>>> ValueError: too many values to unpack
>>>     
>> instead of fumbling around in the dark, try inserting a print statement 
>> before the offending line, so you can see what you're trying to unpack:
>>
>>      print string.split(line, "\t") # see what it is
>>      deposit1, deposit2, deposit3 = string.split(line, "\t")
>>
>> </F>
>>   
> I did and it printed everything up until the 3rd line with 3 numbers for 
> deposits.  I have since figured it out...the teacher put in an extra tab 
> after the last value so python thought it was 4 values for three.  I 
> went back into the file and deleted the extra tab after the 3rd number 
> and saved it...now it's working fine. 
> 
> I'm going to kill her...
> 
> ;)
> 
Alternatively you could use the additional argument to split() that 
tells is the maximum number of splits to [erforms, then strip any 
trailing whitespace off before using the values.

That way tou might get an extra mark for not amending the data file. 
It's called "defensive programming", and you need t take it seriously 
(as does everyone who programs).

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From Shawn at Milochik.com  Fri Sep  7 14:53:12 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Fri, 7 Sep 2007 14:53:12 -0400
Subject: why should I learn python
In-Reply-To: <bf9.20643c03.3412cee5@aol.com>
References: <bf9.20643c03.3412cee5@aol.com>
Message-ID: <2dc0c81b0709071153j619c5e94kbabedd5d90416e7c@mail.gmail.com>

I wholeheartedly second the recommendation of this article:

http://www.linuxjournal.com/article/3882


From steve at holdenweb.com  Sun Sep 16 12:07:08 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 16 Sep 2007 12:07:08 -0400
Subject: (curses) issue about inch()
In-Reply-To: <1189955232.216664.167840@19g2000hsx.googlegroups.com>
References: <1189955232.216664.167840@19g2000hsx.googlegroups.com>
Message-ID: <fcjkba$m0k$4@sea.gmane.org>

Jimmy wrote:
> hi, all
> I attempt to use the function inch() to get the character at the
> current position, and compare it with a particular character like :
> if screen.inch(x,y) == 'F'
> but this method doesn't seem work, can anyone tell me the reason and
> how to corrent it
> thanks
> 
The reason is because something is wrong, and yo fix it by correcting 
that issue.

In other words, if you could be a bit more specific about *how* it 
doesn't work (like, show us the code you are running,a nd any error 
messages or evidence of incorrect results) you will be able to get some 
help that actually helps you.

Would you go to a car repair shop with faulty brakes and just tell them 
"my car isn't working"?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From mridula.ccpl at gmail.com  Tue Sep 18 03:23:35 2007
From: mridula.ccpl at gmail.com (Mridula Ramesh)
Date: Tue, 18 Sep 2007 12:53:35 +0530
Subject: adodb with mysql - connection string syntax for filepath
In-Reply-To: <33dffc910709162342x49657895t938fb1f8af2834de@mail.gmail.com>
References: <33dffc910709162342x49657895t938fb1f8af2834de@mail.gmail.com>
Message-ID: <33dffc910709180023w42471f33n5bd76f8b02f40930@mail.gmail.com>

Hi. Firstly, thank you both very much for the response!

Cliff, I did some more reading up about it after  you corrected me re MySQL
not being a _language_  but another means of storing data (would you believe
NONE of the connection tutorials actually said that?!) Anyway, now I have
MySQL on my machine, and it's installed - if I say "import MySQLdb" in
python prompt, it does that, but I can't see any exe in the program's folder
itself: does that mean tables can only be created by code? *puzzled*

Steve, thank you too, I looked up the link you had given, but I do not yet
know which part of that site may help me... And I am now going to struggle
with Dive Into Python before attempting much else!

This is a nice, helpful mailing group!

Thanks again.




On 17/09/2007, Mridula Ramesh <mridula.ccpl at gmail.com> wrote:
>
> Dear all,
>
> Hi. I am not very tech-savvy so please pardon me if this is a stupid
> question: so far I have been googling for about 4 days to find help for
> this, so now I am desperate! :)
>
> How do you use adodb with mysql to connect to a file that is on your
> machine?
>
> Also, could you please recommend to me a good resource to learn more about
> classes and modules from? i don't understand half of the _init_ business
> that many sites mention. (This *is* something even a newbie needs to learn,
> right?)
>
> Thank you!
>
> M.R.S.
>



-- 

CONSUL CONSOLIDATED PVT LTD.

9/6 1st street
Venkateshwara Nagar
Adyar
Madras 600 020
Ph  : 91 - 44 - 24468117
Fax : 91 - 44 - 24468082.
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From tuomas.vesterinen at pp.inet.fi  Fri Sep  7 04:49:29 2007
From: tuomas.vesterinen at pp.inet.fi (Tuomas)
Date: Fri, 07 Sep 2007 08:49:29 GMT
Subject: interesting puzzle......try this you will be rewarded...
In-Reply-To: <1189072576.997085.32360@r29g2000hsg.googlegroups.com>
References: <1189072576.997085.32360@r29g2000hsg.googlegroups.com>
Message-ID: <tg8Ei.67$2U6.32@read3.inet.fi>


To save your time:

http://ilikeit.desiblogz.com/363/ojofuffo,+ojofuffo,+ojofuffo+-+Solutions+to+the+Hacking+puzzle++by+freestuffhotdeals.com.html

Renu wrote:
> Hi,
> 
> Just click on this link n use ur common sence to navigate.
> 
> It has 23 pages one after the other, starting from this first
> 
> Page.
> The trick is to find a way to go to the next page.
> 
> If u can really go to the 23rd page ur a genius in ur own respect :)
> 
> So best of luck n keep clicking, tik tik....
> 
> http://iamhere.50webs.com
> 


From steve at holdenweb.com  Tue Sep 25 11:55:30 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 25 Sep 2007 11:55:30 -0400
Subject: What is a good way of having several versions of a python module
	installed in parallell?
In-Reply-To: <5ls95aF9pq3gU1@mid.uni-berlin.de>
References: <fdai0b$7iv$1@news.lysator.liu.se>
	<5ls95aF9pq3gU1@mid.uni-berlin.de>
Message-ID: <fdbb1h$qqo$1@sea.gmane.org>

Diez B. Roggisch wrote:
> Joel Hedlund wrote:
> 
>> Hi!
>>
>> I write, use and reuse a lot of small python programs for variuos purposes
>> in my work. These use a growing number of utility modules that I'm
>> continuously developing and adding to as new functionality is needed.
>> Sometimes I discover earlier design mistakes in these modules, and rather
>> than keeping old garbage I often rewrite the parts that are
>> unsatisfactory. This often breaks backwards compatibility, and since I
>> don't feel like updating all the code that relies on the old (functional
>> but flawed) modules, I'm left with a hack library that depends on halting
>> versions of my utility modules. The way I do it now is that I update the
>> programs as needed when I need them, but this approach makes me feel a bit
>> queasy. It seems to me like I'm thinking about this in the wrong way.
>>
>> Does anyone else recognize this situation in general? How do you handle
>> it?
>>
>> I have a feeling it should be possible to have multiple versions of the
>> modules installed simultaneously, and maybe do something like this:
>>
>> mymodule/
>> + mymodule-1.1.3/
>> + mymodule-1.1.0/
>> + mymodule-0.9.5/
>> - __init__.py
>>
>> and having some kind of magic in __init__.py that let's the programmer
>> choose version after import:
>>
>> import mymodule
>> mymodule.require_version("1.1.3")
>>
>> Is this a good way of thinking about it? What would be an efficient way of
>> implementing it?
> 
> Use setuptools. It can exactly do that - install different versions parallel
> as eggs, and with a pre-import require-statment you require the desired
> one.
> 
> Diez

Of course a much simpler, less formal solution, is to install the 
libraries required by a program along with that program in its own 
directory. This more or less guarantees you will get out of sync.

Otherwise, three words:

   test driven development

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From tdelaney at avaya.com  Tue Sep 25 00:46:54 2007
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Tue, 25 Sep 2007 12:46:54 +0800
Subject: sorting a list numbers stored as strings
In-Reply-To: <1190635761.5618.2.camel@dot.uniqsys.com>
Message-ID: <E4C7BCAB1872014F81CEAACD25699B8C0849B4@301081ANEX2.global.avaya.com>

Carsten Haese wrote:

> On Mon, 2007-09-24 at 19:58 +0800, Delaney, Timothy (Tim) wrote:
>> I'm sure that in some version of Python it would have given a
>> ValueError (due to the default radix being 0) but it appears to have
>> changed to a default radix of 10 somewhere along the way.
> 
> Not even Python 1.5.2 seems to have a problem with leading zeroes:
> 
> Python 1.5.2 (#1, Nov  6 1999, 14:53:40) [C] on sco_sv3
> Copyright 1991-1995 Stichting Mathematisch Centrum, Amsterdam
>>>> int("08")
> 8

Yep - appears I must have been misremembering from another language
(dunno which) or I misinterpreted the docs.

In any case, the docs have been made explicit about the situation now.

Tim Delaney


From cai.haibin at gmail.com  Fri Sep 14 02:56:17 2007
From: cai.haibin at gmail.com (james_027)
Date: Fri, 14 Sep 2007 06:56:17 -0000
Subject: mass editing for keys in a dictionary
Message-ID: <1189752977.078417.291770@57g2000hsv.googlegroups.com>

hi,

How could I transform something like this

dict_1 = {'customer_id':1, 'item_id':3, amount:100}

into

dict_2 = {'customer':1, 'item':3, amount:100}

thanks
james



From chris.olekas at gmail.com  Mon Sep 10 10:27:46 2007
From: chris.olekas at gmail.com (Chris)
Date: Mon, 10 Sep 2007 07:27:46 -0700
Subject: How do I read and write to the same CSV file
Message-ID: <1189434466.001109.313060@d55g2000hsg.googlegroups.com>

I want to update one field in a row for a csv file. So far my code
looks something like this

cf_stream = open("\\config.csv","r+")
csv_file = csv.DictReader(cf_stream, ['Algorithm','LastModified'])

and then I know I can do something like this

for row in csv_file
      name = row["Algorithm"]
      date = row["LastModified"]

now what I want is something like this

if date == 0:
      date = os.getmtime()
      # now this is where I want to write into the row of the same csv
file but only updating that one field

How can I do this?



From eternalsquire at comcast.net  Sun Sep  2 14:16:31 2007
From: eternalsquire at comcast.net (The Eternal Squire)
Date: Sun, 02 Sep 2007 11:16:31 -0700
Subject: Would like to perform unpaid research work at a CS graduate school or
	center
Message-ID: <1188756991.988083.34770@k79g2000hse.googlegroups.com>

To all,

About twenty years ago, I was admitted to a Ph.D. program for computer
science.
It was also around that time that I was diagnosed for chronic
depression, which
forced me out of that program into the working word.

I had done my best since then as a software engineer, until late 2005,
when I
was laid off by my most recent workplace.  I have now been out of work
for 2 years,
with no hope of finding anything further.

I have been on medication for my depression since 1998, which
moderates
it somewhat.   Until that time the disease has played havoc with my
interpersonal and employment relationships, I had always done my best
to
compensate by immersing myself in the actual work.

Most ironically, I am now as strong as I ever was for being a
researcher,
even more so for my practical experience, and so long as I avoid a
punishing
work and study load I believe I could do better on a second attempt
for a
doctorate than I ever did on my first.

The problem is obtaining research related references.   I would like
to find
a graduate CS department or university research center that would
allow me
to perform unpaid research work on a remote basis.

I have some interests in parallel computing, from an architecture,
programming
language, and applications point of view.   I will also consider other
topics.

I hold a bachelor's degree in electrical engineering and a master's
degree in computer science, with about 12 to 15 years of practical
software experience in systems programming and embedded programming.
I also hold an Amateur Extra ticket and have my own electronics
laboratory.

Please, this is a sincere request.     Interested parties please send
email
to eternalsquire at hotmail.com




I hold a bachelor's degree in electrical engineering and a master's
degree in computer science, with about 12 to 15 years of practical
software experience in systems programming and embedded programming.
I also hold an Amateur Extra ticket and have my own electronics
laboratory.

Please, this is a sincere request.     Interested parties please send
email
to eternalsquire at hotmail.com



I hold a bachelor's degree in electrical engineering and a master's
degree in computer science, with about 12 to 15 years of practical
software experience in systems programming and embedded programming.
I also hold an Amateur Extra ticket and have my own electronics
laboratory.

Please, this is a sincere request.     Interested parties please send
email
to eternalsquire at hotmail.com



From wizzardx at gmail.com  Thu Sep 20 17:04:28 2007
From: wizzardx at gmail.com (David)
Date: Thu, 20 Sep 2007 23:04:28 +0200
Subject: cannot create my own dict
In-Reply-To: <slrnff463g.536.hat@se-162.se.wtb.tue.nl>
References: <slrnff260r.43o.hat@se-162.se.wtb.tue.nl>
	<46f17c26$0$26298$426a74cc@news.free.fr>
	<slrnff463g.536.hat@se-162.se.wtb.tue.nl>
Message-ID: <18c1e6480709201404o3ba69cdfrc8ccef5172cc836e@mail.gmail.com>

> The reason for this problem is that we are busy re-structuring a large Python
> program, and we want to ensure nobody is messing up our data structures (at
> least not until we are finished).

python-egenix-mxproxy (Debian package name) may be useful.

http://www.egenix.com/products/python/mxBase/


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Sep 12 07:43:38 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 12 Sep 2007 13:43:38 +0200
Subject: Compiler Python
References: <000001c7f4a2$307fa720$917ef560$@com>
	<mailman.404.1189543244.2658.python-list@python.org>
	<5kod78F3udmuU1@mid.individual.net>
	<46e7045d$0$3290$426a74cc@news.free.fr>
Message-ID: <5kq1naF4r90oU2@mid.individual.net>

Bruno Desthuilliers wrote:
> Bjoern Schliessmann a ?crit :

>> I'm not really about the syntax of your question,
                 ^(sure)
> 
> lol !-)

;) It wasn't mean ironically, I really forgot the "sure".

Regards,


Bj?rn

-- 
BOFH excuse #322:

Your Pentium has a heating problem - try cooling it with ice cold
water.(Do not turn of your computer, you do not want to cool down
the Pentium Chip while he isn't working, do you?)



From ldo at geek-central.gen.new_zealand  Sat Sep  1 03:49:17 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 01 Sep 2007 19:49:17 +1200
Subject: advice about `correct' use of decorator
References: <mailman.2074.1187294411.22759.python-list@python.org>
Message-ID: <fbb5d8$m4r$4@lust.ihug.co.nz>

In message <mailman.2074.1187294411.22759.python-list at python.org>, Gerardo
Herzig wrote:

> @is_logued_in
> def change_pass():
>     bla
>     bla
> 
> And so on for all the other functions who needs that the user is still
> loged in.

My suspicion is that most of the methods in your session object (with the
obvious exception of the login method) will require the user to be logged
in, right?

So the trouble with an extra decorator like this, is that you have to
remember to put it on nearly _all_ your methods.

Wouldn't it be simpler and safer to default the other way? Have some way of
saying "doesn't require user to be logged in", and require a valid
logged-in session on all methods where this is not specified?


From DustanGroups at gmail.com  Mon Sep 24 06:09:48 2007
From: DustanGroups at gmail.com (Dustan)
Date: Mon, 24 Sep 2007 10:09:48 -0000
Subject: scope, modyfing outside object from inside the method
In-Reply-To: <fd7o33$g14$02$2@news.t-online.com>
References: <fd7m9s$9fe$1@news2.task.gda.pl>
	<fd7o33$g14$02$2@news.t-online.com>
Message-ID: <1190628588.220275.119360@50g2000hsm.googlegroups.com>

On Sep 24, 2:13 am, Peter Otten <__pete... at web.de> wrote:
>     @property
>     def value(self):
>         return self._resultset[self._row][self._col]

I remember a thread where someone created a version of property that
worked like this, but it's not in the standard python release, unless
it is in python 3000.



From martin at v.loewis.de  Tue Sep  4 00:34:26 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 04 Sep 2007 06:34:26 +0200
Subject: FCGI app reloading on every request
In-Reply-To: <46DCDE59.8060109@animats.com>
References: <46DCDE59.8060109@animats.com>
Message-ID: <46DCE052.40708@v.loewis.de>

John Nagle schrieb:
>    I'm converting a web app from CGI to FCGI.  The application works fine
> under FCGI, but it's being reloaded for every request, which makes FCGI
> kind of pointless.  I wrote a little FCGI app which prints when the
> program is loaded and when it gets a request.  And indeed, the program
> gets reloaded for
> each HTTP request.  Something is probably misconfigured.  But what?

The most likely reason is that your FastCGI server voluntarily choses
to exit after one request. Can you share the mainloop of your
application?

Regards,
Martin


From michele.simionato at gmail.com  Sun Sep  2 13:49:46 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Sun, 02 Sep 2007 17:49:46 -0000
Subject: Google spreadsheets
In-Reply-To: <1i3t5mo.lopt711vavlbwN%aleax@mac.com>
References: <1188564051.726895.288860@y42g2000hsy.googlegroups.com>
	<1188578994.210244.70800@i13g2000prf.googlegroups.com>
	<1i3t5mo.lopt711vavlbwN%aleax@mac.com>
Message-ID: <1188755386.841482.27590@19g2000hsx.googlegroups.com>

On Sep 2, 7:13 pm, al... at mac.com (Alex Martelli) wrote:
> iapain <iap... at gmail.com> wrote:
> > On Aug 31, 5:40 pm, Michele Simionato <michele.simion... at gmail.com>
> > wrote:
> > > I would like to upload a tab-separated file to a Google spreadsheet
> > > from Python. Does anybody
> > > have a recipe handy? TIA,
>
> > >     Michele Simionato
>
> > Probably its irrelevant to python. Use should see Google Spreadsheet
> > API and use it in your python application.
>
> >http://code.google.com/apis/spreadsheets/
>
> For Python-specific use, you probably want to get the Python version of
> the GData client libraries,
> <http://code.google.com/p/gdata-python-client/> ; an example of using it
> with a spreadsheet is at
> <http://gdata-python-client.googlecode.com/svn/trunk/samples/spreadsheet
> s/spreadsheetExample.py> .
>
> Alex

Thanks Alex, that's exactly what I was looking for.

     Michele



From dnhkng at googlemail.com  Tue Sep 11 13:18:16 2007
From: dnhkng at googlemail.com (Dr Mephesto)
Date: Tue, 11 Sep 2007 17:18:16 -0000
Subject: creating really big lists
In-Reply-To: <46e5b1b4$0$30530$426a74cc@news.free.fr>
References: <1188985838.661821.41530@k79g2000hse.googlegroups.com>
	<46e5b1b4$0$30530$426a74cc@news.free.fr>
Message-ID: <1189531096.198401.76590@50g2000hsm.googlegroups.com>

On Sep 8, 8:06 pm, Bruno Desthuilliers
<bdesth.quelquech... at free.quelquepart.fr> wrote:
> Dr Mephesto a ?crit :
>
> > Hi!
>
> > I would like to create a pretty big list of lists; a list 3,000,000
> > long, each entry containing 5 empty lists. My application will append
> > data each of the 5 sublists, so they will be of varying lengths (so no
> > arrays!).
>
> > Does anyone know the most efficient way to do this?
>
> Hem... Did you consider the fact that RAM is not an unlimited resource?
>
> Let's do some simple math (please someone correct me if I'm going off
> the road): if a Python (empty) list object required 256 bits (if I refer
> to some old post by GvR, it's probably more - 384 bytes at least. Some
> Python guru around ?), you'd need (1 + (3000000 * 5)) * 256 bits just to
> build this list of lists. Which would make something around 3 Gb. Not
> counting all other needed memory...
>
> FWIW, run the following code:
>
> # eatallramthenswap.py
> d = {}
> for i in xrange(3000000):
>    d[i] = ([], [], [], [], [])
>
> And monitor what happens with top...

Unused ram is wasted ram :)

I tried using MySQL, and it was to slow. and I have 4gb anyway...



From bdesth.quelquechose at free.quelquepart.fr  Fri Sep 21 20:21:29 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 22 Sep 2007 02:21:29 +0200
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <1190419720.811685.145880@r29g2000hsg.googlegroups.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<mailman.900.1190414696.2658.python-list@python.org>
	<1190415741.380795.259050@y42g2000hsy.googlegroups.com>
	<mailman.904.1190418441.2658.python-list@python.org>
	<1190419720.811685.145880@r29g2000hsg.googlegroups.com>
Message-ID: <46f6eb3d$0$32060$426a34cc@news.free.fr>

Cristian a ?crit :
> On Sep 21, 4:47 pm, "Sean Tierney" <seanttier... at gmail.com> wrote:
> 
>>Just tell him that "functions are like all  other variables and can
>>therefore be passed by other functions or returned by other functions.
>>"
>>
> 
> 
> 
> 
> I could """Just tell him that "functions are like all  other variables
> and can
> therefore be passed by other functions or returned by other functions.
> " """ but wouldn't it be great if Python did this for me? It seems to
> me that the ability for Python to explicitly state that functions-are-
> like-other-variables is there so why not expose it?

Ok, then what about classes ? They also are objects-like-any-other, 
after all. So should we have this syntax too ?

MyClass = class(ParentClass):
   __init__ = function (self, name):
     self.name = name

?-)


From steve at holdenweb.com  Sat Sep  1 08:38:12 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 01 Sep 2007 08:38:12 -0400
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <K_bCi.721$7P7.506@newssvr19.news.prodigy.net>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>	<1188364909.397692.209170@q4g2000prc.googlegroups.com>	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>	<1188369928.755777.142690@i38g2000prf.googlegroups.com>	<4866bea60708291013g56b3dea9m7abcf5e4e4f6e29c@mail.gmail.com>	<mailman.120.1188423362.28954.python-list@python.org>
	<K_bCi.721$7P7.506@newssvr19.news.prodigy.net>
Message-ID: <46D95D34.9010906@holdenweb.com>

Bryan Olson wrote:
> Steve Holden wrote:
> [...]
>> If I can blow my own trumpet briefly, two customers (each using over 25 
>> kLOC I have delivered over the years) ran for two years while I was away 
>> in the UK without having to make a single support call. One of the 
>> systems was actually locked in a cupboard all that time (though I have 
>> since advised that client to at least apply OS patches to bring it up to 
>> date).
> 
>> This was achieved by defensive programming, understanding the user 
>> requirements and just generally knowing what I was doing.
> 
> On the one hand, nice work. Made your customers happy and kept
> them happy. Can't argue with success. On the other hand, 25K lines
> is tiny by software engineering standards. If a support call would
> have to go to you, then the project must be small. Software
> engineering is only a little about an engineer knowing or not
> knowing what he or she is doing; the bigger problem is that
> hundreds or thousand of engineers cannot possibly all know what
> all the others are doing.
> 
I agree that programming-in-the-large brings with it problems that 
aren't experienced in smaller scale projects such as the ones I mentioned.

> I work on large and complex systems. If I screw up -- O.K., face
> facts: *when* I screw up -- the chance of the issue being assigned
> to me is small. Other engineers will own the problems I cause,
> while I work on defects in code I've never touched. I wish I could
> own all my own bugs, but that's not how large and complex systems
> work. Root-cause analysis is the hard part. By the time we know
> what went wrong, 99.99% of the work is done.
> 
This is the kind of realism I like to see in engineering. I am always 
suspicious when any method is promoted as capable of reducing the error 
rate to zero.
> 
> Design-by-contract (or programming-by-contract) shines in large
> and complex projects, though it is not a radical new idea in
> software engineering. We pretty much generally agree that we want
> strong interfaces to encapsulate implementation complexity.
> That's what design-by-contract is really about.
> 
> There is no strong case for adding new features to Python
> specifically for design-by-contract. The language is flexible
> enough to support optionally-executed pre-condition and
> post-condition checks, without any extension. The good and bad
> features of Python for realizing reliable abstraction are set
> and unlikely to change. Python's consistency and flexibility
> are laudable, while duck-typing is a convenience that will
> always make it less reliable than more type-strict languages.
> 
Python's dynamic nature certainly makes it more difficult to reason 
about programs in any formal sense. I've always thought of it as a 
pragmatist's language, and we need to be pragmatic about the downside as 
well as the upside.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From http  Sat Sep  8 01:57:41 2007
From: http (Paul Rubin)
Date: 07 Sep 2007 22:57:41 -0700
Subject: pdb question - spew out "steps" until crash needed
References: <fbta9a$b2p$1@daisy.noc.ucla.edu>
Message-ID: <7xbqcd4s2y.fsf@ruckus.brouhaha.com>

James Stroud <jstroud at mbi.ucla.edu> writes:
> How do I get pdb to just run my program and spew out what's happening
> until it crashes/freezes? (This is a malloc error in a library
> somewhere and I can't figure out where--no exceptions thrown, etc.)

Maybe you want: http://docs.python.org/lib/module-trace.html

However, the malloc problem has probably already screwed things up
long before the application actually freezes.  Your best bet is
to recompile Python with malloc debugging enabled and/or run Python
itself under a debugger.


From grante at visi.com  Mon Sep 10 17:01:09 2007
From: grante at visi.com (Grant Edwards)
Date: Mon, 10 Sep 2007 21:01:09 -0000
Subject: How do I disable warnings?
References: <13eb71tjns922f9@corp.supernews.com>
	<1189457423.063659.127690@57g2000hsv.googlegroups.com>
Message-ID: <13ebc4lci7ov217@corp.supernews.com>

On 2007-09-10, attn.steven.kuo at gmail.com <attn.steven.kuo at gmail.com> wrote:

>> I'd like to disable this warning:
>>
>>  Warning: 'with' will become a reserved keyword in Python 2.6
>>
>> AFAICT, the following should work.  But, it doesn't.
>>
>>   import warnings
>>   warnings.filterwarnings('ignore',".*'with' will become a reserved keyword.*")
>>
>> What am I doing wrong?
>
> That looks to be a compile-time warning.

Doh! Of course it's a compile-time warning.

> Refer to a previous discussion here:
>
>     http://groups.google.com/group/comp.lang.python/msg/9f604b477ad31ef3

Thanks.

-- 
Grant Edwards                   grante             Yow! The Osmonds!  You are
                                  at               all Osmonds!!  Throwing up
                               visi.com            on a freeway at dawn!!!


From david at nospam.spam  Tue Sep 11 06:58:24 2007
From: david at nospam.spam (david)
Date: Tue, 11 Sep 2007 20:58:24 +1000
Subject: /dev/null as a file-like object, or logging to nothing
In-Reply-To: <fc4n48$s40$2@lust.ihug.co.nz>
References: <87k5r1jdzq.fsf@wilson.homeunix.com>
	<5kg48jF33dv5U3@mid.uni-berlin.de>
	<87fy1pjbpl.fsf@wilson.homeunix.com>
	<uxv*tevUr@news.chiark.greenend.org.uk>
	<fc4n48$s40$2@lust.ihug.co.nz>
Message-ID: <13ect6ffo9h2ufa@corp.supernews.com>

Lawrence D'Oliveiro wrote:
> In message <uxv*tevUr at news.chiark.greenend.org.uk>, Sion Arrowsmith wrote:
> 
>> Torsten Bronger  <bronger at physik.rwth-aachen.de> wrote:
>>> Marc 'BlackJack' Rintsch writes:
>>>> `os.devnull`?
>>> Yes, but I wasn't really sure how portable it is, in particular, on
>>> Windows.
>> Windows has a NUL: device which behaves like /dev/null .
> 
> It's not a device, it's a reserved file name. Or rather, a reserved file
> name prefix: any attempt to open a file name beginning with NUL, e.g.
> NUL.DAT, will cause your output to disappear into a black hole.
> 
> This has bitten Windows users more than once.

copy myfile to NULL
copy myfile to NULfilename
copy myfile to NULprefix.txt

All work correctly creating files.

"Prefix" and "beginning with" are a bit misleading,
only a problem with file name NUL(.extension) (not
case sensitive unless case sensitive property is
enabled)

Not sure why you are calling it a reserved file name
instead of device, did not used to be, but many years
since I looked. Of course 'reserved file name' is a
bit misleading: you wouldn't copy bits to a reserved
file name.

Note NUL device used to be very very slow, again,
years since I looked.



From brown at esteem.com  Thu Sep 13 18:24:20 2007
From: brown at esteem.com (Tom Brown)
Date: Thu, 13 Sep 2007 15:24:20 -0700
Subject: How to Start
In-Reply-To: <MPG.215360ba6684d43b9896d5@news.cox.net>
References: <MPG.215360ba6684d43b9896d5@news.cox.net>
Message-ID: <200709131524.20845.brown@esteem.com>

On Thursday 13 September 2007 14:59, Michael R. Copeland wrote:
>    I've decided that Python is a language/environment I'd like to learn
> (I've been a professional programmer for 45+ years), but I really don't
> know where and how to start!  I have a number of books - and am buying
> some more - but because of the bewildering number of after-market
> packages, environments, and add-ons, I am really quite perplexed about
> starting.  8<{{
>    Yes, I could fire up the interactive mode and play with some
> statements...but I consider that sort of thing for programming neophytes
> or experimenting with specific issues.  First, I want to develop a
> simple Windows application, and because of the plethora of "stuff" the
> Python world offers, I don't know where to begin.
>    For example, what basic, easy-to-use interface might I start with to
> build a simple text file parsing and analysis program?  That is, I'd
> like to start with a simple Windows shell that prompts for a file name,
> processes it, and then displays some result.
>    I am certainly impressed with the apparent experience and openness of
> the regular players here, but the discussions here (and in
> c.l.p.announce) truly presume knowledge and experience with Python I
> don't yet have.  Yes, for even a very experienced programmer, entering
> the Python world is very daunting - but I want to get started.
>    Please advise.  TIA

A good book, a link to the module index, a good text editor and a command 
prompt will get you started. Sounds like you have some books. Those should 
help a lot. A good text editor is a matter of taste. I prefer gvim. However, 
gvim has a steep learning curve to become productive. There is eric4, which 
is an IDE. I has a debugger. That may be the place to start. 

Good luck,
Tom


From stefan.arentz at gmail.com  Thu Sep  6 05:26:05 2007
From: stefan.arentz at gmail.com (Stefan Arentz)
Date: 06 Sep 2007 11:26:05 +0200
Subject: How to do python and RESTful
References: <1189022079.403495.175800@g4g2000hsf.googlegroups.com>
	<1189070287.239501.70270@k79g2000hse.googlegroups.com>
Message-ID: <873axs16xe.fsf@kip.sateh.com>

Michele Simionato <michele.simionato at gmail.com> writes:

> On Sep 5, 9:54 pm, MarkyMarc <marcsgbrevko... at gmail.com> wrote:
> > Hi all,
> >
> > I want to make a web service application in python and keywords are
> > RESTful, python and nice urls(urls mapped to python objects).
> >
> > I don't want a big framework but a nice small one, that can just do
> > the things I want.
> >
> > I have be looking at quixote, but is this uptodate? "plain"
> > mod_python, can this make url to http put,get,delete and post?
> >
> > Can some one here point me some where I can read about python and
> > RESTful or have some experiences with other?
> >
> > Any help is apricieted.
> >
> > Regards Marc
> 
> For the client part, there is an easy_installable library called
> restclient (which
> I tested very little but it seems to work). For the server part, I am
> sure there are
> many available,

Another good option is Twisted. The Twisted book from O'Reilly has
examples of using the twisted HTTP client as a REST client. I'm using
that fairly succesful.

 S.


From basilisk96 at gmail.com  Thu Sep  6 22:09:52 2007
From: basilisk96 at gmail.com (Basilisk96)
Date: Fri, 07 Sep 2007 02:09:52 -0000
Subject: interesting puzzle......try this you will be rewarded...
In-Reply-To: <1189130241.529344.52950@57g2000hsv.googlegroups.com>
References: <1189072576.997085.32360@r29g2000hsg.googlegroups.com>
	<46e04138$0$16377$88260bb3@free.teranews.com>
	<IcYDi.1436$4J3.235@newssvr22.news.prodigy.net>
	<1189130241.529344.52950@57g2000hsv.googlegroups.com>
Message-ID: <1189130992.654172.295660@50g2000hsm.googlegroups.com>

Woody!

:))



From kasimmominov at gmail.com  Sun Sep 23 19:13:54 2007
From: kasimmominov at gmail.com (kasim)
Date: Sun, 23 Sep 2007 23:13:54 -0000
Subject: http://www.agloco.com/r/BBFR2592
Message-ID: <1190589234.941754.273680@22g2000hsm.googlegroups.com>


http://kgsm.websitesiekle.com/
Thanks

1.	Hi everyone,
For all of you that are asking for caculations for how much pay, just
consider this.
There is truly no way anyone can calculate with all variables. The pay
is dependent upon the advertisers paying agloco, the search engines
paying agloco, the merchants paying agloco the commissions on the
sales to agloco members, and any other sources of income. This money
all goes into a pool, of which agloco management gets 10% and the rest
is divided among the owners/members. There you have it. income is
variable, percentages for management and the owners ia fixed.
membership is variable. These variable parts will change by the
minute. No reasonable mathmatician will attempt to arrive at
meaningful calculations with two massive variables and one fixed
quantity. All the mathmatician can do at this point is offer
statistical possibilities. In the short view, every person you sponsor
now cuts down on the value of the cash pool individually. In the
longer term, more members means agloco can charge more for the ads and
make the cash pool larger. As far as clicking the ads, That will
create cash pool money when the few make purchases and the merchant
pays agloco the commission on the sale. In at least some cases, the
member will immediately benefit from any discounts that are given to
the agloco membership. Regards searches, I do not know what deal
agloco has with google or the other search engines at this time, but I
do know that as the membership goes up, so does the price google and
the others will pay agloco for each search performed. Google currently
pays aol 10 cents per search performed. Best I can tell you is the per
hour pay will fall into a range somewhere between .00001 cents and
1,000.00 dollars per hour.( both top and bottom values estimated with
the fact that everyone is so desparate for promises that poor Brian
cannot say anything without it being considered a set in concrete
promise.) I intentionally used extremes. Try to keep your shirt on and
wait and see what materializes.



From kwmsmith at gmail.com  Mon Sep 17 12:49:16 2007
From: kwmsmith at gmail.com (Kurt Smith)
Date: Mon, 17 Sep 2007 11:49:16 -0500
Subject: How to assign a function to another function
In-Reply-To: <20070917182359.600c6837.stefano.esposito87@gmail.com>
References: <20070917182359.600c6837.stefano.esposito87@gmail.com>
Message-ID: <c266a7930709170949s6ecb30d6u30200099d93dfac6@mail.gmail.com>

On 9/17/07, Stefano Esposito <stefano.esposito87 at gmail.com> wrote:
> Hi all
>
> what i'm trying to do is this:
>
> >>>def foo ():
> ...     return None
> ...
> >>>def bar ():
> ...     print "called bar"
> ...
> >>>def assigner ():
> ...     foo = bar
> ...

You need to tell "assigner()" that foo doesn't belong to the local
(function) namespace, but rather comes from the global namespace:

In [1]: def foo():
   ...:     return None
   ...:

In [2]: def bar():
   ...:     print "called bar"
   ...:
   ...:

In [3]: def assigner():
   ...:     global foo
   ...:     foo = bar
   ...:
   ...:

In [4]: assigner()

In [5]: foo()
called bar

Kurt


From marek.rocki at wp.pl  Sun Sep 16 07:18:30 2007
From: marek.rocki at wp.pl (marek.rocki at wp.pl)
Date: Sun, 16 Sep 2007 04:18:30 -0700
Subject: generate list of partially accumulated values
In-Reply-To: <1189938119.469599.171960@w3g2000hsg.googlegroups.com>
References: <1189936564.932553.148800@50g2000hsm.googlegroups.com>
	<1189936979.276166.103080@w3g2000hsg.googlegroups.com>
	<1189937183.100462.175070@o80g2000hse.googlegroups.com>
	<1189938119.469599.171960@w3g2000hsg.googlegroups.com>
Message-ID: <1189941510.325769.98490@o80g2000hse.googlegroups.com>

Those methods of computing partial sums seem to be O(n^2) or worse.
What's wrong with an ordinary loop?

for i in xrange(1, len(l)):
    l[i] += l[i - 1]

And as for the list of objects:

ll = [l[i - 1].method(l[i]) for i in xrange(1, len(l))] + l[-1]



From m.n.summerfield at googlemail.com  Wed Sep 26 09:44:23 2007
From: m.n.summerfield at googlemail.com (Mark Summerfield)
Date: Wed, 26 Sep 2007 13:44:23 -0000
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <slrnffkjoa.hc2.apardon@rcpc42.vub.ac.be>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>
	<1190753722.026806.254530@d55g2000hsg.googlegroups.com>
	<1190756003.292096.71130@o80g2000hse.googlegroups.com>
	<1190789981.385466.37870@57g2000hsv.googlegroups.com>
	<Xns99B760A3F5859duncanbooth@127.0.0.1>
	<87sl51lshd.fsf@mulj.homelinux.net>
	<1190799759.367001.106400@r29g2000hsg.googlegroups.com>
	<87fy11lo22.fsf@mulj.homelinux.net>
	<1190804538.469582.96950@22g2000hsm.googlegroups.com>
	<slrnffkjoa.hc2.apardon@rcpc42.vub.ac.be>
Message-ID: <1190814263.104358.158090@n39g2000hsh.googlegroups.com>

On 26 Sep, 13:22, Antoon Pardon <apar... at forel.vub.ac.be> wrote:
> On 2007-09-26, Mark Summerfield <m.n.summerfi... at googlemail.com> wrote:
>
>
>
> > On 26 Sep, 11:27, Hrvoje Niksic <hnik... at xemacs.org> wrote:
> >> Mark Summerfield <m.n.summerfi... at googlemail.com> writes:
> >> > On 26 Sep, 09:51, Hrvoje Niksic <hnik... at xemacs.org> wrote:
> >> >> Duncan Booth <duncan.bo... at invalid.invalid> writes:
> >> >> > I that's the point though: you can't write one implementation
> >> >> > that has good performance for all patterns of use
>
> >> >> An implementation of sorted dict using a balanced tree as the
> >> >> underlying data structure would give decent performance in all the
> >> >> mentioned use cases.  For example, red-black trees search, insert, and
> >> >> delete in O(log n) time.
>
> >> > Basically, as implemented, I have to invalidate if there is any
> >> > change [...]
>
> >> No argument here, as long as the limitation is understood to be a
> >> consequence of the current implementation model.  Seriously proposing
> >> a sorteddict that is a mere syntactic sugar over dict dooms the PEP to
> >> rejection.
>
> > On the Py3K list GvR made it clear that sorteddict wouldn't be in
> > Python until an implementation had been in popular use for some
> > time... so I will not put forward a PEP for it.
>
> >> Major programming language libraries have included sorted mapping and
> >> set types for a while now, making the performance and complexity
> >> constraints generally well understood.  We should make use of that
> >> knowledge when designing sorteddict.
>
> > I know! I use Python and C++ and Qt, so what with the STL and Qt's
> > containers I'm used to having far more containers to choose from than
> > Python offers. I think Python could do with both sorteddict and
> > sortedset in the collections module, but to get decent performance
> > will require a balanced tree (or a skiplist) implementation, and I
> > don't have the time to do that. Apart from Antoon Pardon's AVL tree,
> > there's also Chris Gonnerman's RBTree, also pure Python, with a dict
> > API and that seems to accept a cmp function, but again, I don't know
> > whether it could be adapted to the sorteddict((mapping | sequence |
> > nothing), cmp=None, key=None, reverse=None) API that Paul Hankin
> > described.
>
> Well you should decide what you want. In a previous exchange one of the
> things that was wanted was that you could already seed a tree by using
> key word arguments so that you could do the following:
>
> t=Tree(a=15, b=30)
>
> which would be equivallent to:
>
> t=Tree()
> t.update(a=15,b=30)
>
> But with the above proposal
>
> t=Tree(cmp=cmp)
>
> is not equivallent to
>
> t=Tree()
> t.update(cmp=cmp)
>
> So it seems the API needs some more sorting out.

I think you missed some of the previous postings.

The sorteddict API that has emerged so far is (1) apart from the
constructor, everything is identical to dict, (2) the constructor
takes the same args as sorted(), so if you want to seed with a dict or
with keywords you write sorteddict(dict(a=1,b=2), ...), (or you could
create a sorteddict and use update() since that takes the same args as
dict's constructor).

Could your AVLTree support cmp and keys and reverse?



From joemystery123 at gmail.com  Fri Sep 21 17:04:40 2007
From: joemystery123 at gmail.com (crybaby)
Date: Fri, 21 Sep 2007 14:04:40 -0700
Subject: newb: Simple regex problem headache
Message-ID: <1190408680.273525.209270@w3g2000hsg.googlegroups.com>

import re

s1 ='&nbsp;25000&nbsp;'
s2 = '&nbsp;5.5910&nbsp;'

mypat = re.compile('[0-9]*(\.[0-9]*|$)')
rate= mypat.search(s1)
print rate.group()

rate=mypat.search(s2)
print rate.group()
rate = mypat.search(s1)
price = float(rate.group())
print price

I get an error when it hits the whole number, that is in this format:
s1 ='&nbsp;25000&nbsp;'
For whole number s2, mypat catching empty string.  I want it to give
me 25000.
I am getting this error:

    price = float(rate.group())
    ValueError: empty string for float()

Anyone knows, how I can get 25000 out of s2 = '&nbsp;5.5910&nbsp;'
using regex pattern, mypat = re.compile('[0-9]*(\.[0-9]*|$)').  mypat
works fine for real numbers, but doesn't work for whole numbers.

thanks



From grante at visi.com  Thu Sep 20 12:33:49 2007
From: grante at visi.com (Grant Edwards)
Date: Thu, 20 Sep 2007 16:33:49 -0000
Subject: Python and RTF
References: <1190271676.160077.99270@w3g2000hsg.googlegroups.com>
	<13f51i4adkseae5@corp.supernews.com>
	<1190301666.417426.13320@r29g2000hsg.googlegroups.com>
	<13f57rhcoh575ea@corp.supernews.com>
Message-ID: <13f587d9kvoln40@corp.supernews.com>

On 2007-09-20, Grant Edwards <grante at visi.com> wrote:

> I'm really sure how the LGPL applies to Python applications.

That should have read I'm _not_ really sure how the LGPL
applies to Python applications.  There are clauses about
providing a way for the user to replace the library and
whatnot.  I think that simply defining the API and allowing the
user to replace the .pyc file would be sufficient.

-- 
Grant Edwards                   grante             Yow! ... or were you
                                  at               driving the PONTIAC that
                               visi.com            HONKED at me in MIAMI last
                                                   Tuesday?


From hat at se-162.se.wtb.tue.nl  Wed Sep  5 04:22:36 2007
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Wed, 05 Sep 2007 10:22:36 +0200
Subject: Parse or Pass?
References: <1188917032.271543.236420@d55g2000hsg.googlegroups.com>
	<mailman.28.1188917501.2658.python-list@python.org>
	<46DD916E.4000201@v.loewis.de>
	<46de108a$0$29358$e4fe514c@dreader19.news.xs4all.nl>
Message-ID: <slrnfdspqc.uo9.hat@se-162.se.wtb.tue.nl>

On 2007-09-05, Martin P. Hellwig <mhellwig at xs4all.nl> wrote:
> Martin v. L?wis wrote:
> Eingeben = <Giving in> Input: (A bit of) data from outside the function
> Ausgeben = <Giving out> Output: (A bit of) data to display, network 
> connection or file
> Zur?ckgeben = <Giving back> Return: (altered)(bits of) data (from Input) 
> to Output
>
> Can I assume that Return in general always means that the particular 
> function has exited with that? If not what is the difference then 
> between Output and Return?

It depends on your point of view imho.

You can describe a function call from 'outside', ie I give it values for its
parameters, and it returns me a computed return value.
You can describe the same thing from 'inside', ie I get values from my caller,
compute a result, and output the result.

> And then we have "?bergeben" which translates to throughput (giving 
> over), which in my view is just something that gets data in and puts it 
> out, contextually unaltered.  But would that do that with exiting the 

I would consider this yet another view, namely performance. Function calls are
stil happening, but you focus more on the #calls/second, ie throughput.


So depending on what one is interested in, I think, one structures and
describes what is happening in a different way.
Wouldn't that be a possible explanation for all the subtle different ways of
describing the same thing?

Albert



From m.n.summerfield at googlemail.com  Tue Sep 25 04:53:22 2007
From: m.n.summerfield at googlemail.com (Mark Summerfield)
Date: Tue, 25 Sep 2007 08:53:22 -0000
Subject: sorteddict PEP proposal [started off as orderedict]
Message-ID: <1190710402.481693.5110@50g2000hsm.googlegroups.com>

Hi,

Below is a PEP proposal for a sorteddict. It arises out of a
discussion on this list that began a few weeks ago with the subject of
"An ordered dictionary for the Python library?", and a similar one on
the P3K mailing list with the subject "ordered dict for p3k
collections?".

If there is positive feedback I will submit the PEP to the reviewers,
so if you think it is a good idea please say so. (I'm sure that if you
_don't_ like it you'll tell me anyway:-)

PEP: XXX
Title: Sorted Dictionary
Version: $Revision$
Last-Modified: $Date$
Author: Mark Summerfield
Status: Draft
Type: Standards Track
Content-Type: text/plain
Created: 25-Sep-2007
Python-Version: 2.6
Post-History:


Abstract

    This PEP proposes the addition of a sorted dictionary class to the
    standard library's collections module.


Rationale

    When handling collections of key-value data, it is often
convenient to
    access the data in key order.  One way to do this is to use an
unsorted
    data structure (e.g., a Python dict), and then sort the keys as
needed.
    Another way is to use a sorted data structure (e.g., a sorteddict
as
    proposed in this PEP), and simply access the keys, knowing that
they
    are always in sorted order.

    Both approaches make sense in the right circumstances, but Python
    currently only supports the first approach out of the box.  A
    sorteddict never needs sorting and is ideal for creating indexes
to
    data where the keys are based on some property of the data.
Adding a
    sorteddict to the collections module would not add significantly
to the
    size of Python's standard library, but would provide a very useful
data
    structure.


Specification

    The proposed sorteddict has the same API to the builtin dict, so
can be
    used as a drop-in replacement.  The only behavioural difference
being
    that any list returned by the sorteddict (whether of keys, values,
or
    items) will be in key order, and similarly any iterator returned
will
    iterate in key order.

    In addition, the keys() method has two optional arguments:

    keys(firstindex : int = None, secondindex : int = None) -> list of
keys

    The parameter names aren't nice, but using say "start" and "end"
would
    be misleading since the intention is for the parameters to work
like
    they do in range(), e.g.

        sd.keys()       # returns a list of all the sorteddict's keys
        sd.keys(10)     # returns a list of the first 10 keys
        sd.keys(19, 35) # returns a list of the 19th-34th keys
inclusive

    If an out of range index is given, an IndexError exception is
raised.

    Since the sorteddict's data is always kept in key order, indexes
    (integer offsets) into the sorteddict make sense.  Five additional
    methods are proposed to take advantage of this:

    key(index : int) -> value

    item(index : int) -> (key, value)

    value(index : int) -> key

    set_value(index : int, value)

    delete(index : int)

    Items and values can still be accessed using the key, e.g.,
sd[key],
    since all the dict's methods are available.


Examples

    To keep a collection of filenames on a case-insensitive file
system in
    sorted order, we could use code like this:

        files = collections.sorteddict.sorteddict()
        for name in os.listdir("."):
            files[name.lower()] = name

    We can add new filenames at any time, safe in the knowledge that
    whenever we call files.values(), we will get the files in
    case-insensitive alphabetical order.

    To be able to iterate over a collection of data items in various
    predetermined orders, we could maintain two or more sorteddicts:

        itemsByDate = collections.sorteddict.sorteddict()
        itemsByName = collections.sorteddict.sorteddict()
        itemsBySize = collections.sorteddict.sorteddict()
        for item in listOfItems:
            itemsByDate["%s\t%17X" % (item.date, id(item))] = item
            itemsByName["%s\t%17X" % (item.name, id(item))] = item
            itemsBySize["%s\t%17X" % (item.size, id(item))] = item

    Here we have used the item IDs to ensure key uniqueness.

    Now we can iterate in date or name order, for example:

        for item in itemsByDate:
            print item.name, item.date


Implementation

    A pure Python implementation is available at:

    http://pypi.python.org/pypi/sorteddict


Copyright

    This document has been placed in the public domain.



From steve at REMOVE-THIS-cybersource.com.au  Mon Sep 17 09:36:55 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Mon, 17 Sep 2007 13:36:55 -0000
Subject: generating list of sub lists
References: <1189931217.415065.102820@w3g2000hsg.googlegroups.com>
	<46ee5c5e$0$32487$5a62ac22@per-qv1-newsreader-01.iinet.net.au>
Message-ID: <13et0nnj3qjlr5e@corp.supernews.com>

On Mon, 17 Sep 2007 20:52:14 +1000, Ross Wilson wrote:

> cesco wrote:
>> Hi,
>> 
>> is there a one-liner to accomplish the following task?
>>>From the list
>> l = ['string1', 'string2', 'string3'] generate the list of lists
>> l = [['string1'], ['string1', 'string2'], ['string1', 'string2',
>> 'string3']]
>> 
>> Any help would be appreciated.
>> 
>> Thanks
>> Francesco
>> 
>> 
> l = [l, l]
> 
> Ross


Did you *try* your suggestion before posting?

>>> l = ['string1', 'string2', 'string3']
>>> assert [l, l] == [['string1'], ['string1', 'string2'], 
... ['string1', 'string2', 'string3']]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AssertionError


What you've suggested doesn't even come close to what the Original Poster 
is asking for.


-- 
Steven


From bj_666 at gmx.net  Sun Sep 16 10:45:12 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 16 Sep 2007 14:45:12 GMT
Subject: Needless copying in iterations?
References: <fchk59$mm3$1@daisy.noc.ucla.edu>
	<5l3ab6F5v20uU3@mid.uni-berlin.de> <13eourdrne86e61@corp.supernews.com>
	<874phv42to.fsf@benfinney.id.au> <13epv3fnb6bak15@corp.supernews.com>
	<5l4ghuF655kfU2@mid.uni-berlin.de> <13eqc2daojgho03@corp.supernews.com>
Message-ID: <5l4trnF655kfU3@mid.uni-berlin.de>

On Sun, 16 Sep 2007 13:31:57 +0000, Steven D'Aprano wrote:

> On Sun, 16 Sep 2007 10:58:07 +0000, Marc 'BlackJack' Rintsch wrote:
> 
>> On Sun, 16 Sep 2007 09:50:39 +0000, Steven D'Aprano wrote:
>> 
>>> The point is rather moot, since CPython (and probably other Pythons) do
>>> almost no optimizations. But just because Python is a dynamic language
>>> doesn't mean there are no optimizations possible: Haskell is a dynamic
>>> language, and there are optimizing compilers for it. Of course, it is
>>> much simpler for Haskell, because of the type system it uses.
>> 
>> What do you mean by Haskell is a dynamic language?  It is statically and
>> strict typed and the compiler usually knows all the functions.  No
>> "surprises", no side effects, no duck typing.
> 
> Haskell's IO monad (and possibly the do monad?) allows side effects. It 
> would be a pretty poor programming language that didn't allow input or 
> output!

Those side effects stay in the IO monad and don't "leak" into other areas
so the compiler still knows much more about the possible data flow than
the compilers of most other languages.

> Haskell uses type inference, and has a "maybe" type for those cases where 
> it can't tell what the type will be.

Haskell is statically typed, the compiler must know the type of every name
otherwise it stops with an error message.  The `Maybe` type is for
functions that may return something (typed) or `Nothing`.  For example a
`lookup` function can have the signature:

lookup :: Eq a => a -> [(a,b)] -> Maybe b
lookup key assocList = ...

The compiler infers the concrete types of `a` and `b` at compile time.

> If you still don't accept that Haskell is a dynamic language, for 
> whatever definition of dynamic language you use, I'll withdraw the claim 
> for the sake of not getting bogged down in long arguments over something 
> that was really just a minor point.

You said it must be possible to optimize a dynamic language because there
are optimizing compilers for a dynamic language like Haskell.  That's a
minor point now?

The main problem with optimizing Python code is that the language is
dynamically typed -- the types of objects bound to names are only checked
at runtime and can change at nearly every point in time while executing.
Haskell is statically typed, the types are all inferred at compile time so
it's possible to optimize the code for those types.  The compiler knows
the exact type of every name.  By what definition is that a dynamic
language!?

Ciao,
	Marc 'BlackJack' Rintsch


From zzbbaadd at aol.com  Wed Sep 12 01:15:25 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Tue, 11 Sep 2007 22:15:25 -0700
Subject: Get the complete command line as-is
In-Reply-To: <1189573229.875265.250340@d55g2000hsg.googlegroups.com>
References: <1189566000.793354.308420@19g2000hsx.googlegroups.com>
	<1189567985.089215.108250@k79g2000hse.googlegroups.com>
	<1189573229.875265.250340@d55g2000hsg.googlegroups.com>
Message-ID: <1189574125.024273.119770@o80g2000hse.googlegroups.com>


>
> It seems that \" will retain the quote marks but then the spaces get
> gobbled.
>
> But if you replace the spaces with another character:
>
> python.exe test.py  \"abc#def\"#123
>
> then:
>
> import sys
> commandLine = "".join(sys.argv[1:])
>
> prints commandLine.replace('#',' ')
>
> gives:
>
> "abc def" 123
>
> Don't know if you can use that technique or not.

Came back for a second try and found out that:

python.exe test.py  "\"abc def\" 123"

import sys
commandLine = "".join(sys.argv[1:])

print commandLine

gives:

"abc def" 123



From gary.thrapp at navy.mil  Wed Sep 12 20:07:30 2007
From: gary.thrapp at navy.mil (grt)
Date: Wed, 12 Sep 2007 17:07:30 -0700
Subject: Search path for python script
In-Reply-To: <1189638360.283791.273910@50g2000hsm.googlegroups.com>
References: <1189633230.265179.58780@19g2000hsx.googlegroups.com>
	<1189638360.283791.273910@50g2000hsm.googlegroups.com>
Message-ID: <1189642050.346119.152410@w3g2000hsg.googlegroups.com>

On Sep 12, 4:06 pm, BartlebyScrivener <bscrivene... at gmail.com> wrote:
> On Sep 12, 4:40 pm, grt <gary.thr... at navy.mil> wrote:
>
>
>
> > I'm trying to run a script by typing:
>
> > python test.py
>
> What happens if you just type:
>
> test.py  or test
>
> and hit Enter?
>
> rd

test gives the error: command not found.
test.py gives the error: no such file.



From bdesth.quelquechose at free.quelquepart.fr  Fri Sep 21 20:07:42 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 22 Sep 2007 02:07:42 +0200
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
Message-ID: <46f6e802$0$31736$426a74cc@news.free.fr>

Cristian a ?crit :
(snip)
> To me, the biggest setback for new programmers is the different syntax
> Python has for creating functions. Instead of the common (and easy to
> grasp) syntax of foo = bar

It's actually a mostly *un*common syntax when it comes to functions. The 
only "mainstream" language I know allowing such a syntax is javascript.

Now given python's parsing rules, I wonder how this could be implemented...

> Python has the def foo(): syntax. So, when
> a new programmer is first introduced to functions they are immediately
> confronted with the notion that functions are "different".

Which is the case in most non functional languages.

> After all,
> they have their own special syntax. This seems to only further the
> separation newbies make between "data" and "functions" or "stuff" and
> "actions". Now, the vast majority of us learned this dichotomy when we
> first began to program, so we are ingrained to assume and even expect
> a different syntax for function declaration, but in a program like
> Python there doesn't seem to be any other reason to have it.

Technically, I'd say "patsing rules". From a more conceptual POV, Python 
was meant to be the missing link between shell scripts and C - and some 
design choices clearly (IMHO) came from the desire to look familiar 
enough to C programmers. Even if Python ended up with some (restricted) 
support for functional programming, it's still has it's roots in 
procedural programming.

> Furthermore, I think it actually inhibits the learning of the
> uninitiated. We can, of course, keep the current syntax as sugar.
> 
> To someone who's learning to program wouldn't a syntax like the
> further give them all they need and also reinforces the idea that
> functions are data just like everything else?

Python's functions are *objects* like anything else. And objects are 
more than data. My 2 cents: show your friend that Python's functions are 
objects, and that other objects can be callable too...

> my_function = function(foo, bar): pass
> an_instance_method = function(self, foo): pass
> a_method_declaration = method(self, foo): pass
> 
> The last one is mostly my pet peeve of having Python "magically"
> create methods out of (what is essentially) a function declaration.

There's not much magic in this. What's stored as an attribute of the 
class *is* a function. It's only wrapped in a method object when looked 
up. And FWIW, it's the function object itself that takes care of this, 
thanks to the descriptor protocol (all relevant doc is on python.org).

> When I first learned it, it felt wrong but you had to press through it
> because there was really no other way of declaring methods.

Truth is that you do *not* "declare" methods in Python.


From mingliang2000 at gmail.com  Wed Sep 19 09:39:55 2007
From: mingliang2000 at gmail.com (Leon)
Date: Wed, 19 Sep 2007 06:39:55 -0700
Subject: Find the ID, but how to select/copy the whole string by ID?
Message-ID: <1190209195.493784.133340@q3g2000prf.googlegroups.com>

Hi everybody,

I am a beginer for  Python, hope can get help from you guys.
What I want to do is :

Input an ID -> find the ID in the file -> copy the whole string <str
id='xxx'>yyyyy</str>

stringID = str(raw_input('Enter the string ID : '))
file = open('strings.txt')
sourcefile = file.read()
file.close()
sourcefile.find (stringID)

but how can I select and copy the specific string from <str> to </str>
with id I input?

Thanks!!!



From stodge at gmail.com  Tue Sep 18 09:36:09 2007
From: stodge at gmail.com (Stodge)
Date: Tue, 18 Sep 2007 06:36:09 -0700
Subject: Saving parameters between Python applications?
In-Reply-To: <1190060967.696332.113190@n39g2000hsh.googlegroups.com>
References: <1189969538.830532.98840@g4g2000hsf.googlegroups.com>
	<fcm036$cp8$1@news2.u-psud.fr>
	<1190060967.696332.113190@n39g2000hsh.googlegroups.com>
Message-ID: <1190122569.509673.41420@57g2000hsv.googlegroups.com>

os.path.expanduser isn't an option; I need each console/window to
maintain different values which I wouldn't get from saving to a user's
home directory. Unless I used a different file for each console/window
but that just gets me into the same situation I'm already in. I think
the only option is to set environment variables using another script.
I'm really surprised and disapponited by this.

One option I thought of but haven't investigated, is the ability to
get the parent (i.e. console's) process id and use that to create a
file somewhere. Not sure if this is even possible.



On Sep 17, 4:29 pm, bryanjugglercryptograp... at yahoo.com wrote:
> On Sep 17, 6:39 am, Laurent Pointal
>
> > May use simple file in known place:
> > $HOME/.myprefs
> > $HOME/.conf/myprefs
>
> > Or host specific configuration API:
> > WindowsRegistry HKEY_CURRENT_USER\Software\MySociety\MyApp\myprefs
>
> > See os.getenv, and _winreg Windows specific module.
> > See also standard ConfigParser module
>
> Also, os.path offers expanduser(). The following is reasonably
> portable:
>
>     import os
>
>     user_home_dir = os.path.expanduser("~")
>
> --
> --Bryan




From ivonet at gmail.com  Tue Sep 11 17:26:07 2007
From: ivonet at gmail.com (Ivo)
Date: Tue, 11 Sep 2007 23:26:07 +0200
Subject: Python Database Apps
In-Reply-To: <1189479130.905136.196820@r34g2000hsd.googlegroups.com>
References: <1189479130.905136.196820@r34g2000hsd.googlegroups.com>
Message-ID: <46e70716$0$28777$e4fe514c@dreader12.news.xs4all.nl>

darien.watkins at gmail.com wrote:
> Kindof a poll, kindof curiosity...
> 
> What is your favorite python - database combination?  I'm looking to
> make an app that has a local DB and a server side DB.  I'm looking at
> python and sqlite local side and sql server side.
> 
> Any suggestions????
> 
> Darien
> 
If you like to make a kind of stand alone app with a database, SQLite a 
good choice. It is easy to embed into your app. If you keep to ANSI SQL 
there should be no trouble changing databases at a later date.
I use SQLite for my WebSite http://IvoNet.nl and it performs great.
The whole database is less than 1Mb including the SQLite module for 
python. No 50Mb install needed if you just want a simple database.
It makes my website very portable and easy to install.

MySQL works great to. I have used it a lot and it is very available. 
Just about every provider can provide you one.

Ivo.


From steve at holdenweb.com  Thu Sep 27 13:11:14 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 27 Sep 2007 13:11:14 -0400
Subject: True of False
In-Reply-To: <1190910814.594559.30880@n39g2000hsh.googlegroups.com>
References: <1190910814.594559.30880@n39g2000hsh.googlegroups.com>
Message-ID: <fdgo7j$r12$1@sea.gmane.org>

koutoo at hotmail.com wrote:
> I tried writing a true and false If statement and didn't get
> anything?  I read some previous posts, but I must be missing
> something.  I just tried something easy:
> 
> a = ["a", "b", "c", "d", "e", "f"]
> 
> if "c" in a == True:
>      Print "Yes"
> 
> When I run this, it runs, but nothing prints.  What am I doing wrong?
> Thanks.

You are unnecessarily adding a comparison with True. The correct way to 
write that is

if "c" in a:
   print "yes"

Bu of course you haven't actually told us what you really did, because 
the code you represent has syntax errors.

 >>> a = ["a", "b", "c", "d", "e", "f"]
 >>> "c" in a
True
 >>> if "c" in a == True:
...    print "found it"
...
 >>> if ("c" in a) == True:
...     print "At last!"
...
At last!
 >>>
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From http  Fri Sep  7 21:32:31 2007
From: http (Paul Rubin)
Date: 07 Sep 2007 18:32:31 -0700
Subject: Generating a unique identifier
References: <13e2fgbbpsatm39@corp.supernews.com>
	<mailman.216.1189167281.2658.python-list@python.org>
	<87wsv2ox5t.fsf@benfinney.id.au>
Message-ID: <7xhcm67xhs.fsf@ruckus.brouhaha.com>

Ben Finney <bignose+hates-spam at benfinney.id.au> writes:
> >     http://docs.python.org/lib/module-uuid.html
> I second this recommendation. If you want arbitrary unique IDs that
> are not a function of the data they identify, the simplest solution is
> a monotonically-increasing serial number. If you want more than that,
> you might as well go straight to the standard UUIDs.

The standard UUID's as described in that url don't make any serious
attempt to be unguessable.  It's better to use a string from os.urandom().

To Stephen: double oops, I was thinking of hex digits rather than bytes
when I suggested reading 32 (length of an md5 hash) or 40 (length of
an sha1 hash) from os.urandom.  That should have said 16 or 20 bytes.

If k is the number of unique id's you'll actually use, and N is the
number of possible random uid's (so for 16 bytes, N=2**128 since
16 bytes is 128 bits), the probability of a collision occuring is
approximately exp(-k**2 / (2*N)), assuming k is small compared
with sqrt(N).


From danfolkes at gmail.com  Mon Sep 17 09:50:18 2007
From: danfolkes at gmail.com (danfolkes)
Date: Mon, 17 Sep 2007 13:50:18 -0000
Subject: Web Programming thru python
In-Reply-To: <1190027654.008396.326100@57g2000hsv.googlegroups.com>
References: <1190027654.008396.326100@57g2000hsv.googlegroups.com>
Message-ID: <1190037018.743304.142700@19g2000hsx.googlegroups.com>

I have been wondering the same thing.  I know you have to load the
mod_python into apache.  But I failed on setting that up.  I run an
ubuntu server.

But I would check out a site like this: http://webpython.codepoint.net/mod_python

-Daniel

On Sep 17, 7:14 am, python_lover <govisath... at gmail.com> wrote:
> HI,
>
> Please help how to execute a py file with xitami.
>
> I installed xitami , downloaded lrwp file.
>
> accessing the first web application program
>
> import urllib
> # Get a file-like object for the Python Web site's home page.
> f = urllib.urlopen("http://www.python.org")
> # Read from the object, storing the page's contents in 's'.
> s = f.read()
> f.close()
>
> through browser like "http://localhost/first.py
>
> it is dispaying the source code of the first.py.
>
> Please help me how to execute the file.
>
> thank you.




From m.n.summerfield at googlemail.com  Wed Sep 26 05:42:39 2007
From: m.n.summerfield at googlemail.com (Mark Summerfield)
Date: Wed, 26 Sep 2007 09:42:39 -0000
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <87sl51lshd.fsf@mulj.homelinux.net>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>
	<1190753722.026806.254530@d55g2000hsg.googlegroups.com>
	<1190756003.292096.71130@o80g2000hse.googlegroups.com>
	<1190789981.385466.37870@57g2000hsv.googlegroups.com>
	<Xns99B760A3F5859duncanbooth@127.0.0.1>
	<87sl51lshd.fsf@mulj.homelinux.net>
Message-ID: <1190799759.367001.106400@r29g2000hsg.googlegroups.com>

On 26 Sep, 09:51, Hrvoje Niksic <hnik... at xemacs.org> wrote:
> Duncan Booth <duncan.bo... at invalid.invalid> writes:
> > I that's the point though: you can't write one implementation that has good
> > performance for all patterns of use
>
> An implementation of sorted dict using a balanced tree as the
> underlying data structure would give decent performance in all the
> mentioned use cases.  For example, red-black trees search, insert, and
> delete in O(log n) time.


Basically, as implemented, I have to invalidate if there is any change
to a key _or_ to a value because if cmp or key functions are specified
they could be using the key, the value, or even both. (If key and cmp
were both None and reverse was False, I could use the bisect module
and maintain the keys in sorted order at all times in that case, but
then performance would vary considerably depending on use which I
think would be v. confusing for users.)

You are quite right that using a balanced tree (red-black, AVL, or
b*tree) would provide decent performance in all the use cases. There
appear to be two on PyPI (rbtree and pyavl), but both seem to be C
extensions. Antoon Pardon has a pure Python AVL tree, but whether he
could or would produce a version that had the sorteddict API, I don't
know.



From gagsl-py2 at yahoo.com.ar  Thu Sep  6 23:20:55 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 07 Sep 2007 00:20:55 -0300
Subject: why should I learn python
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
	<mailman.189.1189118213.2658.python-list@python.org>
	<87zlzzs9by.fsf@wilson.homeunix.com>
	<13e1e52cfb1u505@corp.supernews.com>
Message-ID: <op.tx9kw5d1x6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 06 Sep 2007 23:34:10 -0300, Grant Edwards <grante at visi.com>  
escribi?:

> On 2007-09-06, Torsten Bronger <bronger at physik.rwth-aachen.de> wrote:
>> Hall?chen!
>>
>> Tom Brown writes:
>>
>>> [...] Python has been by far the easiest to develop in.  Some
>>> people might say it is not "real programming" because it is so
>>> easy.
>>
>> I can't believe this.  Have you really heard such a statement?
>
> Maybe it's a allusion to that fake Stroustrup interview where
> he supposedly explains that C++ was meant to be a difficult
> language to use as a means to keep more programmers employed at
> higher salaries?

I always thought the only goal of the C++ standard comittee was to devise  
the most intrincate and convoluted rule ever imaginable.
It's like playing AD&D: the basic manual says something, but The Book Of  
The Perfect And Sublime Elf says that in this case this other rule  
applies, but a warrior Elf can read in The Ultimate And Most Complete  
Warrior Companion a totally different rule, but the character's alignment  
forbids all the three possibilities...

-- 
Gabriel Genellina



From zzbbaadd at aol.com  Fri Sep 28 11:25:22 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Fri, 28 Sep 2007 08:25:22 -0700
Subject: Python 3.0 migration plans?
In-Reply-To: <5m4126FbgjabU1@mid.uni-berlin.de>
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>
	<87641v4j38.fsf@benfinney.id.au>
	<1190949502.875203.57690@w3g2000hsg.googlegroups.com>
	<5m3p1dFbl98pU1@mid.uni-berlin.de>
	<1190968707.799398.232550@19g2000hsx.googlegroups.com>
	<5m4126FbgjabU1@mid.uni-berlin.de>
Message-ID: <1190993122.979034.305060@50g2000hsm.googlegroups.com>

On Sep 28, 2:49 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> TheFlyingDutchman wrote:
>
> >> The fact that you compare and criticise the simple annotations like
> >> static or abstract with the much more powerful decorator concept shows
> >> that, despite being the maintainer of a
> >> soon-to-be-ruling-the-python-world Python 3 fork, lack understanding of
> >> even the most basic language features. Which isn't exactly news.[1]
>
> > Don't you mean "lack appreciation for the non-basic language
> > features"? static, class and abstract
> > are basic language features that I appreciate. "decorators" have been
> > in Python for only a small part of its existence, they aren't in the
> > vast majority of languages (if any other language even has them) which
> > means people write all kinds of software without them. Or rather, most
> > of the software ever written didn't use decorators. Doesn't sound
> > basic at all.
>
> People did write all kinds of software in Assembler. And large portions of
> these people complained about every feature that some new language
> introduced.
>
> All serious languages are turing-complete. So can we put away with this
> non-sense argument right away, please?

You said it was a most basic language feature. I still haven't heard
anything that leads me to believe that statement is correct. What
languages implemented decorators as a most basic language feature?
Python didn't have them for over a decade so it doesn't qualify.

>
> >> Maybe you should start using python more and _then_ start discussions
> >> about it's features, when you have good grounds and can provide viable
> >> alternatives? But I guess that's a wish that won't be granted....
>
> > static and abstract keywords would seem to be very viable
> > alternatives. Viable enough that several language designers used them.
>
> As I said - you don't get it. The decorators (in conjunction with the
> descriptor protocol - ever heard of that?) are very powerful yet lead as an
> artifact to simple, declarative implementations of features you like,
> namely static and abstract methods.

You said I had to provide a viable alternative. I did that. I haven't
heard of the descriptor protocol.

One of the problems with "getting" decorators is that they are not in
older books at all and newer books like Beginning Python from Novice
to Professional (c) 2005 Magnus Lie Hetland, that I own, devote almost
nothing to them. Out of 640 pages they are only mentioned
in one paragraph that is in a section titled "Static Methods and Class
Methods",(and followed by a class example with @staticmethod and
@classmethod).

So it seems like Magnus Lie Hetland didn't think they were very
important and he had Professional in his book title.

>
> And as you seem being so reluctant to let new features creep into the
> language, the introduction of new keywords you like?

I'm not against additions on principle.

>
> Besides, those 'several language designers' seem to think that the
> introduction of keywords isn't enough, but a general purpose annotation
> scheme seems to be viable - or how do you explain e.g. JDK 1.5 Annotations?

I certainly wouldn't call them a basic language feature. Java 1.0 came
out in January 1996, Java 1.5 in September 2004. It doesn't appear
that the language designer of Java, James Gosling, is still at the
wheel or BDFL. But yes, Java is showing signs of "complexity creep".
You'll be happy to know that I really dislike the C++ template syntax
and Java has decided to add something similar.



From grue at mail.ru  Wed Sep 12 05:32:41 2007
From: grue at mail.ru (Timofei Shatrov)
Date: Wed, 12 Sep 2007 09:32:41 GMT
Subject: need scsh in a wikip article
References: <1189563310.268611.4550@r34g2000hsd.googlegroups.com>
	<1189568488.932657.129510@o80g2000hse.googlegroups.com>
	<1189588209.836060.46920@50g2000hsm.googlegroups.com>
Message-ID: <46e7b20d.4115317@news.readfreenews.net>

On Wed, 12 Sep 2007 02:10:09 -0700, "cmr.Pent at gmail.com" <cmr.Pent at gmail.com>
tried to confuse everyone with this message:

>> someone please add scsh there.
>
>Why can't YOU add scsh or I am missing something??
>

Maybe he is banned?

-- 
|Don't believe this - you're not worthless              ,gr---------.ru
|It's us against millions and we can't take them all... |  ue     il   |
|But we can take them on!                               |     @ma      |
|                       (A Wilhelm Scream - The Rip)    |______________|


From mcknight0219 at gmail.com  Sat Sep  8 14:13:02 2007
From: mcknight0219 at gmail.com (Jimmy)
Date: Sat, 08 Sep 2007 11:13:02 -0700
Subject: wxpython automate progress bar
Message-ID: <1189275182.954315.16090@19g2000hsx.googlegroups.com>

Hi, I want a progress bar to increase automatically, so I wrote code
like this:
current = 0
		while True:
			if current == 100:
				current = 0
			self._gauge.SetValue(current)
			time.sleep(0.1)
			current = current + 1

I put this in the __init__ section, however, the window will never
show! and there are
error message like this:
** (python:28543): CRITICAL **: clearlooks_style_draw_handle:
assertion `width >= -1' failed

can anyone tell me why this happen?Thanks :)



From harlinseritt at yahoo.com  Thu Sep 13 16:50:51 2007
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: Thu, 13 Sep 2007 13:50:51 -0700
Subject: Decimal formatting
Message-ID: <1189716651.810481.260850@y42g2000hsy.googlegroups.com>

Cant believe I have to post this and get help... and can't believe I
couldnt Google it reasonably well enough... I need to take a float
variable and have it display as a string to always have two decimal
places:

12.3333 -> 12.33
1.0 -> 1.00
etc...

Anyone willing to help with this one?

thanks,

Harlin



From dnhkng at googlemail.com  Wed Sep  5 06:40:22 2007
From: dnhkng at googlemail.com (Dr Mephesto)
Date: Wed, 05 Sep 2007 10:40:22 -0000
Subject: creating really big lists
In-Reply-To: <5k7eacF2g23sU2@mid.uni-berlin.de>
References: <1188985838.661821.41530@k79g2000hse.googlegroups.com>
	<87ejhd2zzt.fsf@rudin.co.uk> <5k7eacF2g23sU2@mid.uni-berlin.de>
Message-ID: <1188988822.903881.244480@d55g2000hsg.googlegroups.com>

yep, thats why I'm asking :)

On Sep 5, 12:22 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Paul Rudin wrote:
> > Dr Mephesto <dnh... at googlemail.com> writes:
>
> >> Hi!
>
> >> I would like to create a pretty big list of lists; a list 3,000,000
> >> long, each entry containing 5 empty lists. My application will append
> >> data each of the 5 sublists, so they will be of varying lengths (so no
> >> arrays!).
>
> >> Does anyone know the most efficient way to do this? I have tried:
>
> >> list = [[[],[],[],[],[]] for _ in xrange(3000000)]
>
> >> but its not soooo fast. Is there a way to do this without looping?
>
> > You can do:
>
> >    [[[],[],[],[],[]]] * 3000000
>
> > although I don't know if it performs any better than what you already
> > have.
>
> You are aware that this is hugely different, because the nested lists are
> references, not new instances? Thus the outcome is most probably (given the
> gazillion of times people stumbled over this) not the desired one...
>
> Diez




From zzbbaadd at aol.com  Wed Sep 19 15:01:52 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Wed, 19 Sep 2007 12:01:52 -0700
Subject: Google and Python
Message-ID: <1190228512.627109.308910@n39g2000hsh.googlegroups.com>

Around 2000 I heard that Google was using Python to some extent. Now I
see that Guido Van Rossum works for them as well as Alex Martellis who
has the title "Uber Technical Lead" which seems to imply some fairly
heavy Python usage there. I was wondering what is done at Google with
Python and which Python "environments/applications" (Zope, TurboGears,
mod_python ...) are in use, and what is done with other languages, and
which other languages are they using.



From joerg.rech at gmail.com  Tue Sep 25 14:28:13 2007
From: joerg.rech at gmail.com (Joerg Rech)
Date: Tue, 25 Sep 2007 11:28:13 -0700
Subject: Survey about Visual Annotations for Software Models
Message-ID: <1190744893.192073.163320@22g2000hsm.googlegroups.com>

Dear software practitioner,
  During software development, we often experience problems regarding
the compilability, quality (e.g., maintainability), or conformance of
our software. With a model-driven approach such as MDSD (Model-Driven
Software Development), we might work on a higher abstraction level
( i.e., software models), but we (will) still experience similar
problems during the development of our software models.

Therefore, in the context of the VIDE project, we are conducting a
survey about how software modeling environments should annotate
software models in order to provide additional information about these
problems. Our goal is to get feedback from you on several annotation
concepts and your opinion about other characteristics of defect
annotations.

Hence, we would like to invite you and members of your organization to
participate in the survey at http://www.online-poll.de/uc/vide-ma/.
Answering the survey should take about 20-30 minutes. The survey will
close on 1 October 2007.

We will draw five winners from all participants who finalized the
survey; they will get an Amazon gift certificate (either amazon.com or
from a local site) for $50.

Please pass information about this survey on to your colleagues and
managers as well as other contacts who might be interested in this
topic.

Many thanks in advance,
Joerg Rech and Axel Spriestersbach

---
Joerg Rech
Project Manager and Scientist
Speaker of the GI-Workgroup on Architecture and Design Patterns

Fraunhofer Institute for Experimental Software Engineering (IESE)
Tel.: +49 (0) 631/6800-2210 email: joerg.rech (at) iese.fraunhofer.de
XING: http://www.xing.com/profile/Joerg_Rech/
LinkedIn: http://www.linkedin.com/in/joergrech



From manuel.graune at koeln.de  Sun Sep 23 12:38:22 2007
From: manuel.graune at koeln.de (Manuel Graune)
Date: Sun, 23 Sep 2007 18:38:22 +0200
Subject: An Editor that Skips to the End of a Def
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87odfxjgjy.fsf@pobox.com> <fd033u$bnc$1@lust.ihug.co.nz>
	<3Md*NJqVr@news.chiark.greenend.org.uk>
Message-ID: <m3hcll72wx.fsf@uriel.graune.org>

Matthew Woodcraft <mattheww at chiark.greenend.org.uk> writes:

> Lawrence D'Oliveiro  <ldo at geek-central.gen.new_zealand> wrote:>
>
>> <http://www.asktog.com/SunWorldColumns/S02KeyboardVMouse3.html>
>
> An interesting story. They say they picked a test for the express
> purpose of proving that in some circumstances cursor keys can be faster
> than the mouse, but came up with an exercise in which, unusually, the
> keyboard part can be performed with one hand, so eliminating the bit
> where the other hand moves from the keyboard to the mouse and back.
>
> -M-
>

It's quite funny, that what the author proposes as "to make it even
harder" actually speeds up the test for the mouse-users quite a bit.
And "cursor keys"? Please, every self respecting editor has ways for
moving around quite a bit more efficiently. 

And on top of that a use case, which no one in his right mind would
do this way. Accomplishing this task with search-and-replace would
have taken about 10 seconds. With Mouse or Keyboard.

Regards,

Manuel


-- 
A hundred men did the rational thing. The sum of those rational choices was
called panic. Neal Stephenson -- System of the world
http://www.graune.org/GnuPG_pubkey.asc
Key fingerprint = 1E44 9CBD DEE4 9E07 5E0A  5828 5476 7E92 2DB4 3C99


From pydecker at gmail.com  Sun Sep 16 08:43:10 2007
From: pydecker at gmail.com (Peter Decker)
Date: Sun, 16 Sep 2007 08:43:10 -0400
Subject: Python statements not forcing whitespace is messy?
In-Reply-To: <fci05d$ohj$1@sea.gmane.org>
References: <1189884110.006272.240840@50g2000hsm.googlegroups.com>
	<mailman.589.1189887114.2658.python-list@python.org>
	<1189890755.870694.29790@r29g2000hsg.googlegroups.com>
	<mailman.594.1189893054.2658.python-list@python.org>
	<fchku3$n6e$1@daisy.noc.ucla.edu> <46ec6826$1@news.eftel.com.au>
	<fci05d$ohj$1@sea.gmane.org>
Message-ID: <ca55a9900709160543p55512a13h668719d737879ebf@mail.gmail.com>

On 9/15/07, Steve Holden <steve at holdenweb.com> wrote:
> John Machin wrote:
> > On 16/09/2007 8:11 AM, James Stroud wrote:
> >> Steve Holden wrote:
> >>> I don't know why you have a bug up your ass about it, as the
> >>> Americans say.
> >> I think most Americans say "wild hare up your ass".
> >

> I guess I got the metaphor wrong?

Maybe it's a Southern US thing. I've always heard "bug" used; somehow
it doesn't seem that a wild hare would fit!

-- 

# p.d.


From mattheww at chiark.greenend.org.uk  Sat Sep 22 12:57:43 2007
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 22 Sep 2007 17:57:43 +0100 (BST)
Subject: Would Anonymous Functions Help in Learning Programming/Python?
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
Message-ID: <Bgv*HjvVr@news.chiark.greenend.org.uk>

Cristian  <super.sgt.pepper at gmail.com> wrote:
> To me, the biggest setback for new programmers is the different
> syntax Python has for creating functions. Instead of the common (and
> easy to grasp) syntax of foo = bar Python has the def foo(): syntax.

[...]

> in a program like Python there doesn't seem to be any other reason to
> have it.

One reason for the different syntax is that functions, unlike most
other objects, know their own names (which can be shown in tracebacks
and the like).

-M-


From lolu999 at gmail.com  Sun Sep  9 22:15:26 2007
From: lolu999 at gmail.com (a.m.)
Date: Mon, 10 Sep 2007 02:15:26 -0000
Subject: How to insert in a string @ a index
In-Reply-To: <46e4153a$0$32052$426a74cc@news.free.fr>
References: <1189274564.462664.131240@22g2000hsm.googlegroups.com>
	<46e4153a$0$32052$426a74cc@news.free.fr>
Message-ID: <1189390526.723534.153390@d55g2000hsg.googlegroups.com>

Thanks guys for you help. I ended up doing this way (for the
records)...

t1 = "hello world hello. hello. \nwhy world hello"

while index<t1.count("hello"):

if (your condition to determine keyword):
t2=t1[:(index+offset)].replace("hello","XYZhello")+t1[((index
+offset):] # offset is 5 (hello = 5 characters)

index+=1



From __peter__ at web.de  Tue Sep 25 04:27:00 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 25 Sep 2007 10:27:00 +0200
Subject: obtaining multiple values from a function.
References: <1190708155.683502.93040@r29g2000hsg.googlegroups.com>
Message-ID: <fdagok$4e4$03$1@news.t-online.com>

Shriphani wrote:

> If I have a function that loops over a few elements and is expected to
> throw out a few tuples as the output, then what should I be using in
> place of return ?

Use a generator and have it /yield/ rather than /return/ results:

>>> def f(items):
...     for item in items:
...             yield item.isdigit(), item.isupper()
... 
>>> for result in f("AAA bbb 111".split()):
...     print result
... 
(False, True)
(False, False)
(True, False)

This is a very memory-efficient approach, particularly if the input items
are created on the fly, e. g. read from a file one at a time.

Peter


From steve at holdenweb.com  Tue Sep 11 08:26:52 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 11 Sep 2007 08:26:52 -0400
Subject: Mac OSX sqlite problem. Missing?
In-Reply-To: <1189513075.665508.245570@50g2000hsm.googlegroups.com>
References: <1189455305.994439.107100@r34g2000hsd.googlegroups.com>	<5klocbF498ruU1@mid.uni-berlin.de>	<1189457469.285055.212670@r29g2000hsg.googlegroups.com>	<1189489594.584753.312330@g4g2000hsf.googlegroups.com>
	<1189513075.665508.245570@50g2000hsm.googlegroups.com>
Message-ID: <fc61ib$9bt$2@sea.gmane.org>

scottishguy wrote:
> On Sep 11, 2:46 am, "attn.steven.... at gmail.com"
> <attn.steven.... at gmail.com> wrote:
>> On Sep 10, 1:51 pm, ricardo.turp... at gmail.com wrote:
>>
>>
>>
>>> Diez B. Roggisch wrote:
>>>> Are you by any chance using the python 2.3 when issuing that import
>>>> statement?
>>>> Diez
>>> Unfortunately not :(
>>> ibook:~/project1$ python -V
>>> Python 2.5
>>> ibook:~/project1$ python
>>> Python 2.5 (r25:51918, Sep 19 2006, 08:49:13)
>>> [GCC 4.0.1 (Apple Computer, Inc. build 5341)] on darwin
>>> Type "help", "copyright", "credits" or "license" for more information.>>> import sqlite
>>> Traceback (most recent call last):
>>>   File "<stdin>", line 1, in <module>
>>> ImportError: No module named sqlite
>> Isn't it sqlite3 (instead of sqlite)?
>>
>> Python 2.5.1c1 (r251c1:54692, Apr 17 2007, 21:12:16)
>> [GCC 4.0.0 (Apple Computer, Inc. build 5026)] on darwin
>> Type "help", "copyright", "credits" or "license" for more information.>>> import sqlite3
>>>>> sqlite3.Connection
>> <type 'sqlite3.Connection'>>>> sqlite3.Connection.__doc__
>>
>> 'SQLite database connection object.'
>>
>>
>>
>> I also see it under that name in the repository:
>>
>>    http://svn.python.org/view/python/trunk/Lib/sqlite3/
>>
>> --
>> Hope this helps,
>> Steven
> 
> The problem is that the user is trying to install the turbogears
> framework, and 'tg-admin' tries to import sqlite (not sqlite3)
> 
> He's getting this error:
>  'import sqlite.  ImportError: No module named sqlite'.
> 
> Without changing the turbogears code, what should he do? Set up a
> symbolic link from 'sqlite3' to 'sqlite' ?
> 
An alternative would be to create a local sqlite.py (importable by tg) 
containing

from sqlite3 import *

though this may not work with an extension module if namespace tricks 
are invoked.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From XX.XmcX at XX.XmclaveauX.com  Mon Sep  3 01:05:18 2007
From: XX.XmcX at XX.XmclaveauX.com (MC)
Date: Mon, 03 Sep 2007 07:05:18 +0200
Subject: [python-win32] How can I get the parentWindow.document object?
References: <1188695505.993750.180020@19g2000hsx.googlegroups.com>
	<mn.19a37d79b4a1bd42.46195@XX.XmclaveauX.com>
Message-ID: <mn.19a97d791b404712.46195@XX.XmclaveauX.com>

Re!

Sorry! The good exemple is :

    ie = win32com.client.Dispatch("InternetExplorer.Application")
    window=ie.Document.parentWindow
    print window.name

another :
    window.alert("Aalleerrtt")

-- 
@-salutations

Michel Claveau




From Shawn at Milochik.com  Thu Sep  6 12:39:31 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Thu, 6 Sep 2007 12:39:31 -0400
Subject: Text processing and file creation
In-Reply-To: <46DFE8B9.400@ehas.org>
References: <1189008809.718361.45790@g4g2000hsf.googlegroups.com>
	<1189024097.175349.221210@w3g2000hsg.googlegroups.com>
	<1189027060.889829.282510@r34g2000hsd.googlegroups.com>
	<46DFE8B9.400@ehas.org>
Message-ID: <2dc0c81b0709060939w60152e17q41ec59ac41b27057@mail.gmail.com>

Here's my solution, for what it's worth:

#!/usr/bin/env python

import os

input = open("test.txt", "r")

counter = 0
fileNum = 0
fileName = ""

def newFileName():

    global fileNum, fileName


    while os.path.exists(fileName) or fileName == "":
        fileNum += 1
        x = "%0.5d" % fileNum
        fileName = "%s.tmp" % x

    return fileName


for line in input:

    if (fileName == "") or (counter == 5):
        if fileName:
            output.close()
        fileName = newFileName()
        counter = 0
        output = open(fileName, "w")

    output.write(line)
    counter += 1

output.close()


From deets at nospam.web.de  Wed Sep 12 08:48:04 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 12 Sep 2007 14:48:04 +0200
Subject: SIP examples
References: <1189598762.360580.119240@22g2000hsm.googlegroups.com>
Message-ID: <5kq5g4F50t62U1@mid.uni-berlin.de>

Srijit Kumar Bhadra wrote:

> I am trying to learn SIP (http://www.riverbankcomputing.co.uk/sip/)
> these days. I do not see any examples similar to SWIG.
> http://www.swig.org/doc.html has lots of examples. But for SIP, all I see
> is a reference guide
> (http://www.riverbankcomputing.com/Docs/sip4/sipref.html). Examples help.
> Where can I get examples for SIP 4.7?

Download pyqt, and look into it. Together with the reference, that's pretty
sufficient.

Diez


From http  Thu Sep 27 22:26:43 2007
From: http (Paul Rubin)
Date: 27 Sep 2007 19:26:43 -0700
Subject: cute use of lambda
References: <1190945901.551940.165240@k79g2000hse.googlegroups.com>
Message-ID: <7xejgjmsnw.fsf@ruckus.brouhaha.com>

Simon Forman <sajmikins at gmail.com> writes:
> class FakeQueue(list):
>     put = list.append
>     get = lambda self: self.pop(0)

from collections import deque
class FakeQueue(deque):
   put = deque.append
   get = deque.popleft


From pyth0nc0d3r at gmail.com  Thu Sep 13 15:01:20 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Thu, 13 Sep 2007 14:01:20 -0500
Subject: Quick Modules question
Message-ID: <eb79828c0709131201l67c61210lc47d2a82b6c766a0@mail.gmail.com>

How do you import modules that aren't in the main python Lib folder?  Is it
possible to keep it in the same file as the script thats being ran?
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From norman.barker at gmail.com  Thu Sep 20 19:44:07 2007
From: norman.barker at gmail.com (Norm)
Date: Thu, 20 Sep 2007 16:44:07 -0700
Subject: Zope review
Message-ID: <1190331847.514475.284200@22g2000hsm.googlegroups.com>

Hi,

without meaning to start a flame war between the various python web
tools, I was wondering if anyone had a review of the status of Zope.
For example, is it being used for new projects or just maintenance?

I really like the look of Zope 3, and the interface/schema pattern for
defining objects looks very useful - but if the general feeling is to
use a different tool since Zope 3 isn't being used in the community
then I would prefer to start with that as I get to grips with Python
again.

My reason for this is that looking at zope.org, the articles section
seems a little old.

thanks,

Norman



From bj_666 at gmx.net  Mon Sep 10 04:14:23 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 10 Sep 2007 08:14:23 GMT
Subject: Python syntax wart
References: <fbvvil$7dj$1@lust.ihug.co.nz>
	<5khh6nF3i5nuU1@mid.uni-berlin.de> <46E390B7.2080808@web.de>
	<fc0518$aa2$5@lust.ihug.co.nz> <5ki2sdF3nr68U1@mid.individual.net>
	<fc2c52$i1l$3@lust.ihug.co.nz> <5kk8p0F3vfqqU1@mid.uni-berlin.de>
	<fc2t89$rik$4@lust.ihug.co.nz>
Message-ID: <5kkcmvF3vfqqU3@mid.uni-berlin.de>

On Mon, 10 Sep 2007 19:54:49 +1200, Lawrence D'Oliveiro wrote:

> In message <5kk8p0F3vfqqU1 at mid.uni-berlin.de>, Marc 'BlackJack' Rintsch
> wrote:
> 
>> On Mon, 10 Sep 2007 15:02:58 +1200, Lawrence D'Oliveiro wrote:
>> 
>>> In message <5ki2sdF3nr68U1 at mid.individual.net>, Bjoern Schliessmann
>>> wrote:
>>> 
>>>> Lawrence D'Oliveiro wrote:
>>>>> But then you can no longer use indentation to display the
>>>>> two-dimensional structure of the statement.
>>>> 
>>>> How can a statement be two-dimensional?
>>> 
>>> Like this (from C++ code, but the idea is the same):
>>> 
>>>     if
>>>       (
>>>             ThisCh >= 'A' and ThisCh <= 'Z'
>>>         or
>>>             ThisCh >= '0' and ThisCh <= '9'
>>>         or
>>>             ThisCh == '_'
>>>         or
>>>             ThisCh == '.'
>>>       )
>>>         ...
>> 
>> I still down see the second dimension.
> 
> Horizontal + vertical = 2 dimensions.

Wow I wrote two dimensional programs all the time without knowing it.

> A more complicated example:
> 
>     if
>       (
>             TheProduct == JobSettings.Product.end()
>         or
>                 TheProduct->second.PerType != ProductPerPerson
>             and
>                 TheProduct->second.PerType != ProductPerNone
>       )
>         ...

Sorry I still don't understand how this could be called a 2D statement. 
Or is this already 3D!?  I see a tree structure here, but still no table. 
And this is also easily written that way in Python if you don't insist on
the line break after the ``if`` or can live with backslashes.

Ciao,
	Marc 'BlackJack' Rintsch


From netizen at gmx.de  Sun Sep 30 15:15:05 2007
From: netizen at gmx.de (Michael Fesser)
Date: Sun, 30 Sep 2007 21:15:05 +0200
Subject: which language allows you to change an argument's value?
References: <1191149233.346818.246170@22g2000hsm.googlegroups.com>
	<f891e9884d1151a8d46e8be15e43b788@ruby-forum.com>
	<1191170989.227928.252880@g4g2000hsf.googlegroups.com>
Message-ID: <04tvf317vuo9kf6fi2mdfoglrsg57g2tas@4ax.com>

.oO(Summercool)

>I think in Pascal and C, we can never have an
>argument modified unless we explicitly allow it, by passing in the
>pointer (address) of the argument.

Pascal also allows passing by reference, which is done with the keyword
'var' when declaring the function parameters. Object Pascal also allows
const parameters.

Micha


From unews at onlinehome.de  Tue Sep 11 05:35:17 2007
From: unews at onlinehome.de (Uwe Grauer)
Date: Tue, 11 Sep 2007 11:35:17 +0200
Subject: Python Database Apps
In-Reply-To: <1189479130.905136.196820@r34g2000hsd.googlegroups.com>
References: <1189479130.905136.196820@r34g2000hsd.googlegroups.com>
Message-ID: <fc5ngl$9af$1@online.de>

darien.watkins at gmail.com wrote:
> Kindof a poll, kindof curiosity...
> 
> What is your favorite python - database combination?  I'm looking to
> make an app that has a local DB and a server side DB.  I'm looking at
> python and sqlite local side and sql server side.
> 
> Any suggestions????
> 
> Darien
> 

http://dabodev.com/


From gagsl-py2 at yahoo.com.ar  Mon Sep 17 17:51:23 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 17 Sep 2007 18:51:23 -0300
Subject: Extracting xml from html
References: <1190061079.025479.129070@w3g2000hsg.googlegroups.com>
Message-ID: <op.tytizxu5x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 17 Sep 2007 17:31:19 -0300, <kyosohma at gmail.com> escribi?:

> I am attempting to extract some XML from an HTML document that I get
> returned from a form based web page. For some reason, I cannot figure
> out how to do this. I thought I could use the minidom module to do it,
> but all I get is a screwy traceback:
>
> Traceback (most recent call last):
>   File "C:\Python24\lib\xml\dom\expatbuilder.py", line 207, in
> parseFile
>     parser.Parse(buffer, 0)
> ExpatError: mismatched tag: line 1, column 357

So your HTML is not a well formed XML document, as many html pages, and  
you can't use an XML parser. (even a valid HTML document may not be valid  
XML). Let's try with some mismatched tags:

py> text = '''<html>
... <body>
... <p>lots of <div>screwy text including divs and <span>spans</p>
... <Row status="o">
...     <RecordNum>1126264</RecordNum>
...     <Make>Mitsubishi</Make>
...     <Model>Mirage DE</Model>
... </Row>
... </body>
... </html>'''
py>
py> import xml.dom.minidom
py> doc = xml.dom.minidom.parseString(text)
Traceback (most recent call last):
...
xml.parsers.expat.ExpatError: mismatched tag: line 3, column 60

You will need a more robust parser, like BeautifulSoup  
<http://www.crummy.com/software/BeautifulSoup/>

py> from BeautifulSoup import BeautifulSoup
py> soup = BeautifulSoup(text)
py> for row in soup.findAll("row"):
...   print row.recordnum, row.make.contents, row.model.string
...
<recordnum>1126264</recordnum> [u'Mitsubishi'] Mirage DE

Depending on your document, you may prefer to extract the XML blocks using  
BeautifulSoup, and then parse each one using BeautifulStoneSoup (the XML  
parser) or xml.etree.ElementTree

-- 
Gabriel Genellina



From mark at streamservice.nl  Tue Sep 11 18:05:36 2007
From: mark at streamservice.nl (Stream Service || Mark Scholten)
Date: Wed, 12 Sep 2007 00:05:36 +0200
Subject: Python.org mirror
In-Reply-To: <011a01c7f4bc$b9230ee0$0300a8c0@HPPAVILION>
References: <011a01c7f4bc$b9230ee0$0300a8c0@HPPAVILION>
Message-ID: <BE1D3BF66F77490B9FA0D00B3E5A0F57@laptopmark>

Hello,

Thank you for the information, I will also contact them.

With kind regards, Met vriendelijke groet,

Mark Scholten
Stream Service
Web: http://www.streamservice.nl/
E-mail: mark at streamservice.nl
NOC: http://www.mynoc.eu/
NOC e-mail: noc at streamservice.nl
Tel.: +31 (0)642 40 86 02
Fax: +31 (0)20 20 101 57
KVK: 08141074
BTW: NL104278274B01

Stream Service ondersteund de opensource gemeenschap met de gratis hosting 
van http://nl.php.net/ .
Stream Service is supporting the opensource community by hosting 
http://nl.php.net/ for free.
----- Original Message ----- 
From: "Terry Reedy" <tjreedy at udel.edu>
To: <mark at streamservice.nl>
Sent: Tuesday, September 11, 2007 11:42 PM
Subject: Re: Python.org mirror


> |Could you inform me about the options to become an officiel python.org
> mirror?
>
> The main python.org site maintainers do not necessarily read this
> group/list.
>
> If no response here, try webmaster at python.org
>
>
>
> 



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Sep  6 05:51:02 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 06 Sep 2007 11:51:02 +0200
Subject: We need PIGs :)
In-Reply-To: <87hcm81dot.fsf@kip.sateh.com>
References: <mailman.131.1188450658.28954.python-list@python.org>
	<46d74472$0$402$426a34cc@news.free.fr>
	<87hcm81dot.fsf@kip.sateh.com>
Message-ID: <46dfcd87$0$5618$426a34cc@news.free.fr>

Stefan Arentz a ?crit :
> Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> writes:
> 
> ...
> 
>> The problem with Java is that it makes it very painfull to bridge two
>> APIs together, while Python usually makes it a breeze (easy
>> delegation, no dumb-ass psycho-rigid type system). So Java's solution
>> (hyper-formalization) isn't necessary here.
> 
> Interesting. I find Java much more predictable with APIs than Python
> actually.

I'm not going to debate on this because it's absolutely not what I'm 
talking about. My point is that Python has:

- duck typing, so you don't need one class subclassing another just to 
satisfy the compiler - as long as the object you send respects the 
expected protocol, everything's ok

- good support for delegation (via the __getattr__/__setattr__ magic 
methods), so you don't have to go thru the pain of hand-writing all the 
delegate methods - only the ones for which there's more to be done than 
straightforward delegation.


> Java has pretty strict rules for style and API design,

Java has pretty strict rules for almost anything.


From zzbbaadd at aol.com  Fri Sep 28 17:07:47 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Fri, 28 Sep 2007 14:07:47 -0700
Subject: Python 3.0 migration plans?
In-Reply-To: <mailman.1251.1191010221.2658.python-list@python.org>
References: <1191002679.569709.16870@22g2000hsm.googlegroups.com>
	<mailman.1242.1191003389.2658.python-list@python.org>
	<1191005906.556751.261940@22g2000hsm.googlegroups.com>
	<5m51l4Fbao07U2@mid.uni-berlin.de>
	<1191007754.740566.137510@n39g2000hsh.googlegroups.com>
	<1191008702.579795.141180@r29g2000hsg.googlegroups.com>
	<1191009608.985644.271160@50g2000hsm.googlegroups.com>
	<mailman.1251.1191010221.2658.python-list@python.org>
Message-ID: <1191013667.777259.206110@22g2000hsm.googlegroups.com>

On Sep 28, 1:09 pm, Steve Holden <st... at holdenweb.com> wrote:

> That's because the tutor list doesn't offer a newsgroup. He was probably
> just trying to get rid of you.
>
> Now at 98.75% ...

Not sure if that's the reading on your trollmeter or on the meter that
measures what percentage of your posts you get huffy.



From steve at holdenweb.com  Tue Sep  4 10:51:17 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 04 Sep 2007 07:51:17 -0700
Subject: Parse or Pass?
In-Reply-To: <1188917032.271543.236420@d55g2000hsg.googlegroups.com>
References: <1188917032.271543.236420@d55g2000hsg.googlegroups.com>
Message-ID: <fbjrd6$1l6$1@sea.gmane.org>

frenchy64 wrote:
> I'm very confused...I want to describe passing variables to functions
> and I've seen these two words used in very similar contexts.
> 
> Is there a difference between them?
> 
In general, "parsing" is analyzing the grammatical structure of a 
string. People sometimes talk loosely about "parsing the command line". 
but I don't think that's normally applied to providing the actual 
arguments (corresponding to the definition's "formal parameters") when a 
function is called - that's argument passing.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From mail at timgolden.me.uk  Thu Sep  6 07:45:04 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 06 Sep 2007 12:45:04 +0100
Subject: Nudge needed for rst to html
In-Reply-To: <46DFE68E.2080906@strank.info>
References: <46DFE179.40003@timgolden.me.uk> <46DFE68E.2080906@strank.info>
Message-ID: <46DFE840.7000607@timgolden.me.uk>

Stefan Rank wrote:

> on 06.09.2007 13:16 Tim Golden said the following:
>> I'm a bit embarrassed about this, but I've scoured
>> the docutils docs and I can't seem to work out how
>> to take a block of ReStructuredText and output a
>> raw HTML fragment, ideally without a surrounding
>> document or embedded/linked css etc. (I'm trying
>> to allow rst in our helpdesk system which can render
>> nicely on the web version and be readable in text).

> try this::
> 
>    import docutils.core
> 
>    parts = docutils.core.publish_parts("Hello!", writer_name="html")
>    html = parts['body']
> 
> tfm: http://docutils.sourceforge.net/docs/api/publisher.html

Exactly the nudge I needed. Thanks very much, Stefan.

TJG


From govisathish at gmail.com  Mon Sep 17 07:14:14 2007
From: govisathish at gmail.com (python_lover)
Date: Mon, 17 Sep 2007 11:14:14 -0000
Subject: Web Programming thru python
Message-ID: <1190027654.008396.326100@57g2000hsv.googlegroups.com>

HI,

Please help how to execute a py file with xitami.


I installed xitami , downloaded lrwp file.


accessing the first web application program


import urllib
# Get a file-like object for the Python Web site's home page.
f = urllib.urlopen("http://www.python.org")
# Read from the object, storing the page's contents in 's'.
s = f.read()
f.close()


through browser like "http://localhost/first.py


it is dispaying the source code of the first.py.


Please help me how to execute the file.


thank you.



From wink at saville.com  Thu Sep 27 00:43:32 2007
From: wink at saville.com (wink)
Date: Thu, 27 Sep 2007 04:43:32 -0000
Subject: Asynchronous Messaging
In-Reply-To: <mailman.1119.1190822847.2658.python-list@python.org>
References: <1190807252.731074.141450@k79g2000hse.googlegroups.com>
	<1190819912.344267.52680@50g2000hsm.googlegroups.com>
	<mailman.1119.1190822847.2658.python-list@python.org>
Message-ID: <1190868212.383316.20990@57g2000hsv.googlegroups.com>

Fredrik,

You are most correct, but Queue is slow compared to deque but
not for the reason I guessed. Apparently it's because deque is
implemented in C while Queue is in python. Using the program below
it looks there is about a 35:1 speed difference.

            100 d.append  0.000011s  0.1097us per
            100 d.popL    0.000011s  0.1097us per
            100 q.put     0.000429s  4.2892us per
            100 q.get     0.000391s  3.9077us per

So someday it _might_ warrant adding Queue to collections.


#!/usr/bin/python

import timeit
import Queue
from collections import deque

setupD = """
from collections import deque
d=deque()
cnt = %d
for x in xrange(cnt):
    d.append(x)
"""

setupQ = """
import Queue
q=Queue.Queue()
cnt = %d
for x in xrange(cnt):
    q.put(x)
"""

def main():
    cnt = 100
    t = timeit.Timer(setup=setupD % cnt, stmt="d.append(0)")
    time = min(t.repeat(10000, cnt))
    print "      %9d d.append  %fs %7.4fus per" % \
            (cnt, time, (time/cnt) * 1000000.0)

    t = timeit.Timer(setup=setupD % cnt, stmt="d.popleft()")
    time = min(t.repeat(10000, cnt))
    print "      %9d d.popL    %fs %7.4fus per" % \
            (cnt, time, (time/cnt) * 1000000.0)

    t = timeit.Timer(setup=setupQ % cnt, stmt="q.put(0)")
    time = min(t.repeat(10000, cnt))
    print "      %9d q.put     %fs %7.4fus per" % \
            (cnt, time, (time/cnt) * 1000000.0)

    t = timeit.Timer(setup=setupQ % cnt, stmt="q.get()")
    time = min(t.repeat(10000, cnt))
    print "      %9d q.get     %fs %7.4fus per" % \
            (cnt, time, (time/cnt) * 1000000.0)
if __name__ == "__main__":
    main()



From steve at REMOVE-THIS-cybersource.com.au  Thu Sep 13 12:21:36 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Thu, 13 Sep 2007 16:21:36 -0000
Subject: newbie: self.member syntax seems /really/ annoying
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189666095.727426.135170@o80g2000hse.googlegroups.com>
	<1189685403.306218.13270@22g2000hsm.googlegroups.com>
	<13eigagsuk74l55@corp.supernews.com>
	<46e94623$0$30375$9b4e6d93@newsspool4.arcor-online.net>
Message-ID: <13eiosgssjkt3dd@corp.supernews.com>

On Thu, 13 Sep 2007 16:16:03 +0200, Wildemar Wildenburger wrote:

> I see merit in using
> 
>    (_.foo + _.bar) * _.baz
> 
> instead of
> 
>    (s.foo + s.bar) * s.baz
> 
> because I'm trained to interpret the underscore as a synonym for one
> space. It's not particularly beautiful, but that is probably a matter of
> habituation. And that exact word is probably the reason why I'd still
> use self or s (explained by a comment, because I can get very dumb if I
> have to).
> 
> It's a matter of taste, so there is no point in bashing a valid
> suggestion.

It's not just a matter of taste.

Reading comprehensibility is an objective, measurable quantity, and I 
would bet that "(self.foo + self.bar) * self.baz" would be measurably 
more readable on average than either of your two alternatives _even for 
those people who claim to hate it_. 

But what do I care? If people are writing code that only they will see, 
they can use any conventions they feel like. It's no skin off my nose.

But if you're writing code that is going to be seen by others in the 
wider community, perhaps because it's open source, or because you're 
working in a team of coders, or even because you're posting snippets to 
comp.lang.python asking for assistance, then it is wise to write using 
conventions that others use. The harder you make it for people to read 
your code, the fewer people will be willing or able or bothered to read 
it.


-- 
Steven.


From jstroud at mbi.ucla.edu  Mon Sep 17 04:08:43 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 17 Sep 2007 01:08:43 -0700
Subject: adding a static class to another class
In-Reply-To: <fckjna$uci$1@daisy.noc.ucla.edu>
References: <mailman.629.1189984482.2658.python-list@python.org>
	<fckjna$uci$1@daisy.noc.ucla.edu>
Message-ID: <twqHi.8371$z_5.8284@nlpi069.nbdc.sbc.com>

James Stroud wrote:
> Nathan Harmston wrote:
>> And also preventing more than one Manager instance instantiated at one
>> time.
> 
> Forgot to answer this. You want the singleton pattern:
> 
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52558

But not really a singleton now that I think about it...

class Singletonish(object):
     """ A python singletonish """

     class __impl(object):
         """ Implementation of the singletonish interface """

         def spam(self):
             """ Test method, return singletonish id """
             return id(self)

     # storage for the instance reference
     __instance = None

     def __init__(self):
         """ Create singletonish instance """
         Singletonish.__instance = Singletonish.__impl()

     def __getattr__(self, attr):
         """ Delegate access to implementation """
         if attr == '__id__':
           return id(Singletonish.__instance)
         return getattr(Singletonish.__instance, attr)

     def __setattr__(self, attr, value):
         """ Delegate access to implementation """
         return setattr(Singletonish.__instance, attr, value)


In action:

py> class Singletonish(object):
...     """ A python singletonish """
...     class __impl(object):
...         """ Implementation of the singletonish interface """
...         def spam(self):
...             """ Test method, return singletonish id """
...             return id(self)
...     # storage for the instance reference
...     __instance = None
...     def __init__(self):
...         """ Create singletonish instance """
...         Singletonish.__instance = Singletonish.__impl()
...     def __getattr__(self, attr):
...         """ Delegate access to implementation """
...         return getattr(Singletonish.__instance, attr)
...     def __setattr__(self, attr, value):
...         """ Delegate access to implementation """
...         return setattr(Singletonish.__instance, attr, value)
...
py> s = Singletonish()
py> print s.spam()
18727248
py>
py> t = Singletonish()
py> print t.spam()
18682480
py> print s.spam()
18682480


Of course t and s are not /really/ the same:


py> print id(t)
18727056
py> print id(s)
18727280
py> assert t is s
------------------------------------------------------------
Traceback (most recent call last):
   File "<ipython console>", line 1, in <module>
<type 'exceptions.AssertionError'>


But this shouldn't matter unless you have a special use case because the 
implementation to all Singletonish objects are delegated to to the 
latest __impl object and so behave identically.

James


From gagsl-py2 at yahoo.com.ar  Mon Sep 10 05:29:15 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 10 Sep 2007 02:29:15 -0700
Subject: concise code (beginner)
In-Reply-To: <13e99756io95p66@corp.supernews.com>
References: <13dsvqrqivtf092@corp.supernews.com>
	<13dv4uqqb806ff0@corp.supernews.com> <fbqo83$8fd$1@lust.ihug.co.nz>
	<13e99756io95p66@corp.supernews.com>
Message-ID: <1189416555.067037.244350@k79g2000hse.googlegroups.com>

"Lawrence D'Oliveiro" <ldo at geek-central.gen.new_zealand> wrote in
message
news:fbqo83$8fd$1 at lust.ihug.co.nz...

Why not just build a new list? E.g.

   newdevs = []
   for dev in devs :
       ...
       if not removing_dev :
           newdevs.append(dev)
       #end if
   #end for
   devs = newdevs

En Sun, 09 Sep 2007 22:58:54 -0300, bambam <david at asdf.asdf> escribi?:

I can try that, but I'm not sure that it will work. The problem
is that devList is just a pointer to a list owned by someone else.
Making devList point to a new list won't work: I need to make
the parent list different. I could do this by adding an extra
level of indirection, but I think at the risk making the call
environment more complex.

Then use [:] to *replace* all the old list items, do not merely rebind
the name. That last statement
should be, instead:

devs[:] = newdevs

(Please don't top-post)

--
Gabriel Genellina



From gagsl-py2 at yahoo.com.ar  Wed Sep 26 01:25:54 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 26 Sep 2007 02:25:54 -0300
Subject: Best way to do attribute docstrings?
References: <1189195567.238990.54440@57g2000hsv.googlegroups.com>
	<mailman.262.1189214761.2658.python-list@python.org>
	<1189540345.260656.115760@q5g2000prf.googlegroups.com>
	<1190770891.044084.123540@50g2000hsm.googlegroups.com>
Message-ID: <op.ty8xdg1kx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 25 Sep 2007 22:41:31 -0300, Ken Kuhlman <kskuhlman at gmail.com>  
escribi?:

> Replying to myself in case someone finds this interesting.
>
> Anyway, I took another shot at this with a little fresher mind, and it
> was quickly obvious that I was trying to force attributes to behave
> more like classes.  It was a small step from there to creating a
> factory function to return instances of the appropriate class.  I'm
> much happier with the result than either of the two previously posted
> kludges.

Still there is something I don't understand on your design. You appear to  
be always concerned about *class* attributes. *Instance* attributes are  
far more comon, and usually they change their value many times.

> class Animal(object):
>     four_legs = attr(value = True, doc = "Animal has four legs")
>     favorite_food = attr('cheese', doc = "Animal's favorite food")
>     has_fur = attr(False)
>     has_fur.__doc__ "Animal has fur"

As an example, how would you annotate attributes on a hierarchy like this?

class Animal(object):
     can_fly = False # no Animal can fly unless explicitely noted
     lives = 1 # most Animals have a single life
     def __init__(self, color, legs, favorite_food):
         self.color = color
         self.legs = legs
         self.favorite_food = favorite_food

class Mammal(Animal):
     pass

class Cat(Mammal):
     def __init__(self, color):
         Mammal.__init__(self, color=color, legs=4, favorite_food='mice')
         self.lives = 7 # a cat starts with 7 lives

class Mouse(Mammal):
     def __init__(self, color, personality):
         Mammal.__init__(self, color=color, legs=4, favorite_food='cheese')
         self.personality = personality

class Bird(Animal):
     can_fly = True
     def __init__(self, color):
         Animal.__init__(self, color=color, legs=2, favorite_food='seed')

tweety = Bird('yellow')
sylvester = Cat('black')
tom = Cat('blue')
jerry = Mouse('brown', 'nice')
itchy = Mouse('blue', 'sadist')
scratchy = Cat('black')
scratchy.lives = 7**7 # or so...

print tweety.legs
print scratchy.color
print scratchy.lives

-- 
Gabriel Genellina



From m.n.summerfield at googlemail.com  Sat Sep 15 01:10:02 2007
From: m.n.summerfield at googlemail.com (Mark Summerfield)
Date: Fri, 14 Sep 2007 22:10:02 -0700
Subject: An ordered dictionary for the Python library?
In-Reply-To: <fceq87$ivr$1@daisy.noc.ucla.edu>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<7xzlzrtrjn.fsf@ruckus.brouhaha.com>
	<1189664832.876539.86800@k79g2000hse.googlegroups.com>
	<7xps0mmig9.fsf@ruckus.brouhaha.com>
	<1189733708.659317.83950@y42g2000hsy.googlegroups.com>
	<1189753968.917636.310120@19g2000hsx.googlegroups.com>
	<fcemqi$g76$1@daisy.noc.ucla.edu>
	<1189800045.642278.313860@o80g2000hse.googlegroups.com>
	<fceq87$ivr$1@daisy.noc.ucla.edu>
Message-ID: <1189833002.694934.284960@57g2000hsv.googlegroups.com>

On 14 Sep, 21:23, James Stroud <jstr... at mbi.ucla.edu> wrote:
> Mark Summerfield wrote:
> > I guess I'll have to rename my module (although unfortunately, my book
> > has just gone into production and I have a (simpler) example of what I
> > considered to be an ordered dict, so I will be adding to the
> > terminology confusion). That notwithstanding, given that it is a
> > sorteddict, how is the API?
>
> I must think the API good because I have been implementing, in parallel
> with this discussion, my own "OrderedDict" with a very similar API (this
> is part of a larger project where I recently found the need to have a
> well-implemented ordered dict). The only real omission I see is to allow
> instantiating a "sorted dict" with an optional cmp function--to allow
> the generalization of such features as case-independence, etc.

I tend to create different orderings by munging the keys rather than
by having optional cmp functions (as you'll see in the sorteddict.py
docstring). I've now put sorteddict on PyPI (with docs & tests):
http://pypi.python.org/pypi/sorteddict

I'm going offline for a week, so I'll see if there's any consensus or
progress when I'm back online, and then decide whether to do a PEP or
not.



From mcknight0219 at gmail.com  Sat Sep  8 13:27:27 2007
From: mcknight0219 at gmail.com (Jimmy)
Date: Sat, 08 Sep 2007 10:27:27 -0700
Subject: wxPython unexpected exit
In-Reply-To: <1189172540.784080.231440@22g2000hsm.googlegroups.com>
References: <1189152617.169438.296630@d55g2000hsg.googlegroups.com>
	<1189172540.784080.231440@22g2000hsm.googlegroups.com>
Message-ID: <1189272447.892980.282380@r29g2000hsg.googlegroups.com>

On Sep 7, 9:42 pm, kyoso... at gmail.com wrote:
> On Sep 7, 3:10 am, Jimmy <mcknight0... at gmail.com> wrote:
>
>
>
> > Hi, wxPython is cool and easy to use, But I ran into a problem
> > recently when I try to write a GUI.
> > The thing is I want to periodically update the content of StatixText
> > object, so after create them, I pack them into a list...the problem
> > comes when I later try to extract them from the list! I don't know
> > why?
> > my code is as following:
>
> > import wx, socket
> > import thread
>
> > class MyFrame(wx.Frame):
>
> >         firstrun = 0
> >         def __init__(self):
> >                 wx.Frame.__init__(self, None, -1, 'Notifier')
> >                 self.panel = wx.Panel(self, -1)
> >                 self.length = 50
> >                 self.scale = 0.6
> >                 self.count = 5
> >                 self.size = wx.Frame.GetSize(self)
> >                 self.distance = self.size[1] / self.count
> >                 self.labellist = []
> >                 self.gaugelist = []
>
> >         def ParseAndDisplay(self, data):
> >                 print "Successful access to main Frame class"
> >                 print 'And receive data: ', data
> >                 if MyFrame.firstrun == 0:
> >                         print 'First time run'
> >                         items = 3
> >                         for i in range(items):
> >                                 self.labellist.append(wx.StaticText(self.panel, -1, data+str(i),
> > (150, 50+i*20), (300,30)))
> >                         MyFrame.firstrun = 1
> >                 else:
> >                         self.labellist[0].SetLabel('AAA')//PROGRAM WILL ABORT HERE!!!
> >                         self.labellist[1].SetLabel("Guo")
> >                         self.labellist[2].SetLabel("Qiang")
>
> > class NetUdp:
>
> >         def __init__(self):
> >                 self.port = 8081
> >                 self.s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
> >                 self.s.bind(("", self.port))
> >                 print "Listening on port", self.port
>
> >         def recvdata(self):
> >                 data, addr = self.s.recvfrom(1024)
> >                 return data
>
> > def netThread():
> >         netudp = NetUdp()
> >         while True:
> >                 data = netudp.recvdata()
> >                 frame.ParseAndDisplay(data)
>
> > if __name__ == '__main__':
> >         firstrun = 0
> >         app = wx.PySimpleApp()
> >         frame = MyFrame()
> >         frame.Show()
> > # start network thread first
> >         id = thread.start_new_thread(netThread, ())
> > # main wxpython loop begins
> >         app.MainLoop()
>
> > I know the code is ugly, but can anyone really save me here!
>
> If you use threads that update the GUI, you need to take a look at the
> following wiki page:http://wiki.wxpython.org/LongRunningTasks
>
> I've used the techniques therein and they *just work*. I'm not sure if
> you can set values on items in a list or not. I've tried that sort of
> thing and sometimes it works and sometimes it doesn't.
>
> The wxPython group is probably the best place to ask these questions
> anyway:http://www.wxpython.org/maillist.php
>
> Mike

Thanks for your help! It seems work!
Another question: I create a progress bar, and on creation, it will be
displayed,
How can I invisualize it when later I no longer need it?



From tedpottel at gmail.com  Sat Sep 22 11:44:38 2007
From: tedpottel at gmail.com (tedpottel at gmail.com)
Date: Sat, 22 Sep 2007 15:44:38 -0000
Subject: can I run pythons IDLE from a command line??
Message-ID: <1190475878.971841.253140@k79g2000hse.googlegroups.com>

Hi,
Is their a version of pythons IDLE that will run in a dos command
line?
The reason is that I would like to be able to run python code
interactively from my parable by connecting to my desktop using remote
command line or a telnet program.



From shaileshk at gmail.com  Sun Sep 30 23:18:00 2007
From: shaileshk at gmail.com (shailesh)
Date: Sun, 30 Sep 2007 20:18:00 -0700
Subject: Creating a custom python python distribution
Message-ID: <1191208680.221428.11880@50g2000hsm.googlegroups.com>

Hi,
I wish to create a Python distribution includind Python and some other
libraries (Zope 3, PyWin32, numpy, lxml, etc.) which are required for
my applications. e.g. there are Enthough and ASPN distributions of
Python.

Unfortunately, I have not been able to find the right documentation
for this purpose.

Could some one give an overview of what needs to be done for this
purpose?

With regards,
 -Shailesh



From sysfault at gmail.com  Thu Sep 20 12:20:09 2007
From: sysfault at gmail.com (Anthony Greene)
Date: Thu, 20 Sep 2007 12:20:09 -0400
Subject: os.path.getmtime() and compare with a date type
In-Reply-To: <1190302285.127448.288010@22g2000hsm.googlegroups.com>
References: <1190302285.127448.288010@22g2000hsm.googlegroups.com>
Message-ID: <46F29DB9.90102@gmail.com>

junchi.tang at gmail.com wrote:
> Hi,
> I am new to python and are tryint to write a simple program delete log
> files that are older than 30 days.
>
> So I used os.path.getmtime(filepath) and compare it with a date but it
> does not compile.
>
> threshold_time = datetime.date.today() - datetime.timedelta(days=30)
> mod_time = os.path.getmtime(file_path)
>
> if( mod_time < threshold_time):
>          #delete file
>
> However the interpreter complains at the if line, say "can't comapre
> datetime.date to int
>
> How can I covert one of them to make it work?
>
> Thank you!
>
>   
You are looking for datetime.datetime.fromtimestamp(mod_time)


From ivonet at gmail.com  Fri Sep 21 16:29:37 2007
From: ivonet at gmail.com (Ivo)
Date: Fri, 21 Sep 2007 22:29:37 +0200
Subject: Resolving windows shortcut to url
In-Reply-To: <46f422d8$0$3030$e4fe514c@dreader31.news.xs4all.nl>
References: <lh68f3dskbiosrr98qideunruumqme1kel@4ax.com>
	<46f422d8$0$3030$e4fe514c@dreader31.news.xs4all.nl>
Message-ID: <46f428ce$0$3030$e4fe514c@dreader31.news.xs4all.nl>

Ivo wrote:
> Richard Townsend wrote:
>> If I have a windows shortcut to a URL, is there a way to get the URL
>> in a Python app?
>>
>> I found some code that uses pythoncom to resolve shortcuts to local
>> files, but I haven't found any examples for URLs.
>>
>> The PyWin32 help mentions the PyIUniformResourceLocator Object, but I
>> couldn't find an example of how to use it.
>>
> do you mean a *.lnk file or a *.url file?

for a link (*.lnk) file:


from win32com.shell import shell
import pythoncom
import os, sys

class PyShortcut(object):
     def __init__(self):
         self._base = pythoncom.CoCreateInstance(shell.CLSID_ShellLink,
                                                 None,
 
pythoncom.CLSCTX_INPROC_SERVER,
                                                 shell.IID_IShellLink)

     def load(self, filename):
 
self._base.QueryInterface(pythoncom.IID_IPersistFile).Load(filename)

     def save(self, filename):
 
self._base.QueryInterface(pythoncom.IID_IPersistFile).Save(filename, 0)

     def __getattr__(self, name):
         if name != "_base":
             return getattr(self._base, name)


if __name__=="__main__":
     lnk = PyShortcut()
     lnk.load("path to your shortcut file including the .lnk extention 
even if you don't see it in windows")
     print "Location:", lnk.GetPath(shell.SLGP_RAWPATH)[0]


From marcsgbrevkonto at gmail.com  Wed Sep  5 15:54:39 2007
From: marcsgbrevkonto at gmail.com (MarkyMarc)
Date: Wed, 05 Sep 2007 19:54:39 -0000
Subject: How to do python and RESTful
Message-ID: <1189022079.403495.175800@g4g2000hsf.googlegroups.com>

Hi all,

I want to make a web service application in python and keywords are
RESTful, python and nice urls(urls mapped to python objects).

I don't want a big framework but a nice small one, that can just do
the things I want.

I have be looking at quixote, but is this uptodate? "plain"
mod_python, can this make url to http put,get,delete and post?

Can some one here point me some where I can read about python and
RESTful or have some experiences with other?

Any help is apricieted.

Regards Marc



From steve at holdenweb.com  Fri Sep 21 12:11:49 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 21 Sep 2007 12:11:49 -0400
Subject: calling extension's autoconf/make from distutils
In-Reply-To: <1190386224.536371.136640@q3g2000prf.googlegroups.com>
References: <1190349834.894931.128050@q3g2000prf.googlegroups.com>
	<1190386224.536371.136640@q3g2000prf.googlegroups.com>
Message-ID: <fd0qg6$kvo$1@sea.gmane.org>

Gary Jefferson wrote:
> On Sep 20, 10:43 pm, Gary Jefferson <garyjefferson... at yahoo.com>
> wrote:
>> I've got a python extension that comes with its own standard autoconf/
>> automake system, and I can "python setup.py build" just fine with it
>> as long as I have previously done "./configure" in that directory.
>>
>> However, 'python setup.py bdist_rpm' can't hope to have done './
>> configure' first, as it untars and tries to build the extension there.
>>
>> Is there a hook for bdist_rpm (and friends) that will allow me to
>> insert a './configure' in the build process, sometime before it tries
>> to build the extension?
>>
>> Thanks,
>> Gary
> 
> 
> I ended up simply subclassing 'Extension' and having it os.system('./
> configure') before proceeding.
> 
> This isn't perfect, as it does the './configure' everytime, but it
> works.
> 
If it really is a one-off thing, you only need to ruin configure if 
config-status doesn't exist. That isn't a difficult check ...

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From michele.simionato at gmail.com  Wed Sep 19 22:48:13 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Thu, 20 Sep 2007 02:48:13 -0000
Subject: super() doesn't get superclass
In-Reply-To: <mailman.778.1190225664.2658.python-list@python.org>
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au>
	<46f0fba0$0$29605$426a34cc@news.free.fr>
	<1190199134.791808.267110@22g2000hsm.googlegroups.com>
	<mailman.778.1190225664.2658.python-list@python.org>
Message-ID: <1190256493.827576.139470@r29g2000hsg.googlegroups.com>

On Sep 19, 8:14 pm, Ed Leafe <e... at leafe.com> wrote:
> On Sep 19, 2007, at 6:52 AM, Michele Simionato wrote:
>
> > Well, I am personally *against* multiple inheritance (i.e. IMO it
> > gives more troubles than advantages)
>
>         For the sorts of examples that have been used in this thread, it
> isn't MI that's problematic; it's the poor quality of the design.
>
>         Mixing two complete classes to create a multiply-inherited class is
> almost always the sign of poor design. OTOH, mixin-style classes are
> a wonderful way to ensure consistency across several different
> classes that all need a common behavior added to them. We use mixins
> extensively throughout Dabo, and they allow us to give several
> classes the desired behaviors, while only having one mixin class to
> maintain.

I am not against mixins (even if I am certainly very much
against the *abuse* of mixins, such as in Zope 2). What
I would advocate (but I realize that it will never happen
in Python) is single inheritance + mixins a la Ruby.

             Michele Simionato



From deets at nospam.web.de  Sun Sep  2 18:29:01 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 03 Sep 2007 00:29:01 +0200
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
In-Reply-To: <46db085d$0$16113$9b4e6d93@newsspool1.arcor-online.net>
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
	<1188735642.391419.103650@19g2000hsx.googlegroups.com>
	<1188740716.423349.304370@y42g2000hsy.googlegroups.com>
	<1188743299.664137.194760@d55g2000hsg.googlegroups.com>
	<46daeaec$0$19889$426a74cc@news.free.fr>
	<46DB04DD.80801@v.loewis.de>
	<46db085d$0$16113$9b4e6d93@newsspool1.arcor-online.net>
Message-ID: <5k0rppF1l48jU1@mid.uni-berlin.de>

Wildemar Wildenburger schrieb:
> Martin v. L?wis wrote:
>>>> (2) it is a interpretation language
>>> Not quite. It's compiled to byte-code - just like Java (would you call
>>> Java an 'interpreted language' ?)
>>
>> Python is not implemented like Java. In Java (at least in HotSpot),
>> the byte code is further compiled to machine code before execution;
>> in Python, the byte code is interpreted.
>>
> OK, good. Naive question now comming to mind: Why doesn't Python do the 
> latter as well?

because of the dynamic nature of it. Java is statically typed, so the 
JIT can heavily optimize.

OTH psyco IS a JIT-compiler to optimize certain calculations which are 
mostly of a numerical nature. But this can't be done to the extend it is 
possible in java.

Diez


From dimonb at gmail.com  Tue Sep 25 15:32:21 2007
From: dimonb at gmail.com (Dmitry Balabanov)
Date: Tue, 25 Sep 2007 23:32:21 +0400
Subject: [ANN] Release 0.65.1 of Task Coach
In-Reply-To: <67dd1f930709231355h16b2954clc219f5fb59eddc9f@mail.gmail.com>
References: <67dd1f930709231355h16b2954clc219f5fb59eddc9f@mail.gmail.com>
Message-ID: <9550150c0709251232k75da2f10nc1472af7dfc4d869@mail.gmail.com>

2007/9/24, Frank Niessink <frank at niessink.com>:
> Hi,
>
> I'm happy to announce release 0.65.1 of Task Coach. This release fixes
> one critical bug and two minor bugs. Since the critical bug may lead
> to data loss, I recommend users of release 0.65.0 to upgrade.
>
> Bugs fixed:
>
> * Saving a task file after adding attachments via the 'add attachment'
> menu or context menu fails.
> * Tooltip windows steals keyboard focus on some platforms.
> * Taskbar icon is not transparent on Linux.
>
>
> What is Task Coach?
>
> Task Coach is a simple task manager that allows for hierarchical
> tasks, i.e. tasks in tasks. Task Coach is open source (GPL) and is
> developed using Python and wxPython. You can download Task Coach from:
>
> http://www.taskcoach.org
>
> In addition to the source distribution, packaged distributions are
> available for Windows XP, Mac OSX, and Linux (Debian and RPM format).
>
> Note that Task Coach is alpha software, meaning that it is wise to back
> up your task file regularly, and especially when upgrading to a new
> release.
>
> Cheers, Frank
> --
> http://mail.python.org/mailman/listinfo/python-announce-list
>
>         Support the Python Software Foundation:
>         http://www.python.org/psf/donations.html
>


-- 
Regards, Dmitry.


From ndoe_JTK_05 at yahoo.co.id  Wed Sep 19 02:06:14 2007
From: ndoe_JTK_05 at yahoo.co.id (ndoe)
Date: Tue, 18 Sep 2007 23:06:14 -0700
Subject: Drag image
Message-ID: <1190181974.468405.126430@z24g2000prh.googlegroups.com>

i want show image from button? and the image can be drag and rezise ?
any body help me!!! i try to make it but is not  sucsseful yet



From oliviermigeon at gmail.com  Mon Sep  3 03:32:22 2007
From: oliviermigeon at gmail.com (olivier)
Date: Mon, 03 Sep 2007 00:32:22 -0700
Subject: PYTHONPATH not working on Windows XP (?)
In-Reply-To: <mailman.305.1188798242.28954.python-list@python.org>
References: <mailman.305.1188798242.28954.python-list@python.org>
Message-ID: <1188804742.738490.50470@19g2000hsx.googlegroups.com>

Hi,

> Any suggestions for adding my path to sys.path permanently?

You can write a file in Lib/site-packages with a 'pth' extension (the
name itself doesn't matter) containing the path you want to add.

Example:
MyCustomLib.pth:
C:/docs/utils

And be careful with path separator on win32. It should be "/" or "\\",
never "\".

Regards,

 Olivier




From prince9919 at gmail.com  Thu Sep  6 05:56:16 2007
From: prince9919 at gmail.com (Renu)
Date: Thu, 06 Sep 2007 09:56:16 -0000
Subject: interesting puzzle......try this you will be rewarded...
Message-ID: <1189072576.997085.32360@r29g2000hsg.googlegroups.com>

Hi,

Just click on this link n use ur common sence to navigate.

It has 23 pages one after the other, starting from this first

Page.
The trick is to find a way to go to the next page.

If u can really go to the 23rd page ur a genius in ur own respect :)

So best of luck n keep clicking, tik tik....

http://iamhere.50webs.com



From larry.bates at websafe.com  Tue Sep 25 12:17:47 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 25 Sep 2007 11:17:47 -0500
Subject: HTTPS  request
In-Reply-To: <1190730718.341771.215970@19g2000hsx.googlegroups.com>
References: <1190730718.341771.215970@19g2000hsx.googlegroups.com>
Message-ID: <RfWdncfv3JRWqWTbnZ2dnUVZ_qfinZ2d@comcast.com>

Johny wrote:
> If I need to log in to a site using https protocol must I use
> certification file and key file?
> The class HTTPSConnection syntax is
> class HTTPSConnection( host[, port, key_file, cert_file])
> 
> and I do not know if it is nescessary or not.
> Thanks for help.
> L.
> 
Depends on what the server requires.  You can do basic authenticate to a https: 
site if it supports it.

-Larry


From jimrthomas at gmail.com  Thu Sep 13 07:51:36 2007
From: jimrthomas at gmail.com (Philem)
Date: Thu, 13 Sep 2007 11:51:36 -0000
Subject: Python+Expect+Win32 = Not Possible?
In-Reply-To: <1189657637.539038.317280@k79g2000hse.googlegroups.com>
References: <1189657637.539038.317280@k79g2000hse.googlegroups.com>
Message-ID: <1189684296.283237.286220@g4g2000hsf.googlegroups.com>

On Sep 13, 12:27 am, gamename <namesagame-use... at yahoo.com> wrote:
> Hi,
>
> Is it still the case there is no practical Expect-like module for
> win32? I know that cygwin can support pexpect, but that isn't an
> option here --- I have to use a native win32 Python version.
>
> Are there alternatives, or is it simply not an option to replicate
> Expect on win32 with python?
>
> All I'm trying to do is start a couple processes, wait for each to say
> "done" on stdout and then quit (or timeout if something went wrong).
>
> TIA,
> -T

You could try this link: http://www.activestate.com/Products/activetcl/features.plex
and see if that gives you what you need.

Luck!
-J



From alperkanat at gmail.com  Mon Sep 10 14:38:26 2007
From: alperkanat at gmail.com (T-u-N-i-X)
Date: Mon, 10 Sep 2007 11:38:26 -0700
Subject: PIL Error: "cannot read interlaced PNG files"
Message-ID: <1189449506.496986.88290@y42g2000hsy.googlegroups.com>

Hey There,

I'm developing an application that lets the user to upload JPG and PNG
files. I'm using PIL to check the images after the upload (like
checking it storage size, width and height). But PIL raises an error:

"cannot read interlaced PNG files"

It says that interlaced PNG files are not supported in the PIL
documentation. I'm using PIL 1.1.6-2 on Arch Linux..

I can check all images with:

from PIL import Image
im = Image.open('image.png')
im.info

which returns a dictionary about the image. If the dict has
'interlace' key with the value 1, then I reject the event that's being
send with a validation error. But I don't think this is a good idea
since this could be very annoying for the users.



From sjmachin at lexicon.net  Sat Sep 15 08:41:31 2007
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 15 Sep 2007 05:41:31 -0700
Subject: int('\x23') != 0x23 (a.k.a convert char to integer of its byte
	representation)
In-Reply-To: <1189857328.342615.105660@g4g2000hsf.googlegroups.com>
References: <1189857328.342615.105660@g4g2000hsf.googlegroups.com>
Message-ID: <1189860091.937055.284120@n39g2000hsh.googlegroups.com>

On Sep 15, 9:55 pm, Boris Du?ek <boris.du... at gmail.com> wrote:
> Hi,
>
> I am looking for the best way to convert a string of length 1 (= 1
> character as string) to integer that has the same value as numeric
> representation of that character. Background: I am writing functions
> abstracting endianness, e.g. converting a string of length 4 to the
> appropriate integer value (e.g. '\x01\x00\x00\x00' = 2**24 for big
> endian memory, 2**0 for little endian memory). For this, I need to
> know the numeric value of each byte and sum them according to
> endianness.
>
> I thought that something like int('\x01') might work, provided the
> argument is string of length 1, but that throws an error:
>
> >>> int('\x12')
>
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> ValueError: invalid literal for int():
>
> The code I want to write looks like this:
>
> mem = '\x11\x22\x33\x44'
> factor = 1
> sum = 0
> for byte in mem:
>     sum += int(byte) * factor
>     factor *= 2**8
>
> Could you please tell me how to achieve what I want in Python? (it
> would be straightforward in C)
>

'BlackJack' has already sent you looking for the docs for ord() and
the struct module but a few other clues seem necessary:

1. Don't "think that something like int() might work", read the docs.

2. "factor *= 2 **8"?? Python compiles to bytecode; don't make it work
any harder than it has to. "factor" is quite unnecessary. That loop
needs exactly 1 statement:
    sum = (sum << 8) + ord(byte)

3. Don't use "sum" as a variable name; it will shadow the sum() built-
in function.

4. Read through the docs for *all* the built-in
functions -- all kinds of interesting and useful gadgets to be found
there.

5. In a dark corner there lives a strange beast called the array
module:

>>> import array
>>> array.array('I', '\x01\x00\x00\x00')[0]
1L
>>> array.array('I', '\x00\x00\x00\x01')[0]
16777216L
>>> 2**24
16777216
>>>

HTH,
John



From steve at holdenweb.com  Thu Sep 20 05:59:06 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 20 Sep 2007 05:59:06 -0400
Subject: Sets in Python
In-Reply-To: <1190260923.243865.312190@z24g2000prh.googlegroups.com>
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>	<CeB*qHeVr@news.chiark.greenend.org.uk>	<1190235483.412972.81280@v23g2000prn.googlegroups.com>	<13f3m15igkstq2e@corp.supernews.com>
	<1190260923.243865.312190@z24g2000prh.googlegroups.com>
Message-ID: <fctg97$8ij$1@sea.gmane.org>

Karthik Gurusamy wrote:
> On Sep 19, 7:17 pm, Steven D'Aprano <st... at REMOVE-THIS-
> cybersource.com.au> wrote:
>> On Wed, 19 Sep 2007 20:58:03 +0000, Karthik Gurusamy wrote:
>>> While it's easy to explain the behavior, I think the decision to dis-
>>> allow mutable items as keys is a bit arbitrary. There is no need for
>>> dict to recompute hash
>> What???
>>
>> Of course it does. How else can it look up the key? Because it (somehow)
>> just recognizes that it has seen the key before? How? By magic?
> 
> You answered it yourself later. For a mapping service, hash is just
> one way to do things. What you need is for each item in the
> collection, a unique key.
> How you go from the key to the value is not something a programmer
> needs to know.
> Your mind is set on thinking on hash alone and hence you don't see
> beyond it.
> 
There's a reason for that: the developers (and particularly Tim Peters) 
have, to use a phrase Tim is fond of "optimized the snot" out of dict, 
and the mechanism is fundamental to much of Python's internals. So don't 
expect to be able to tamper wiht it without adversely affectinf performance.

>>> (first of all, a user doesn't even need to know
>>> if underneath 'hashing' is used -- the service is just a mapping between
>>> one item to another item).
>> The user doesn't need to know the mechanism, but the dict does. Dicts are
>> implemented as hash tables. I suppose they could be implemented as
>> something else (what? linear lists? some sort of tree?) but the same
>> considerations must be made:
> 
> Oh yes. If the keys are all integers (or any set of items that can be
> ordered), why not an avl. It has guaranteed O(log N) while a hash in
> worst case is O(N). Why you want to tie yourself to the drawbacks of
> one datastructure? Understand your goal is not to provide a hash; but
> to provide a mapping service.
> 
Possibly so, but the goals also include "excellent speed" and "as wide a 
set of keys as is (practically) possible".

How would you suggest Python avoids "[tying itself] to the drawbacks of 
one data structure"? Implement different strategies according to the key 
values used? That'll surely speed things up, not.

Python provides you with plenty of tools to implement optimized data 
structures for your own applications. Arguing for making them language 
primitives merely reveals your design inexperience.
> 
>  the dict must be able to find keys it has
>> seen before. How is the dict supposed to recognise the key if the key has
>> changed?
>>
>>> Since we know hashing is used, all that is needed is, a well-defined way
>>> to construct a hash out of a mutable. "Given a sequence, how to get a
>>> hash" is the problem.
>> Nonsense. That's not the problem. The problem is how to get exactly the
>> same hash when the sequence has changed.
> 
> Yes, if you keep thinking hash is the only tool you got.
> 
>> In other words, if you have two mutable objects M1 and M2, then you
>> expect:
>>
> 
> No. I don't expect. I expect the hash to be different. Why do you keep
> thinking it's the mappings responsibility to take care of a changing
> key.
> 
Because mappings must do precisely that. Do you actually know what a 
mapping *is*?

>> hash(M1) == hash(M2) if and only if M1 and M2 are equal
>> hash(M1) != hash(M2) if M1 and M2 are unequal
>>
>> but also:
>>
>> if M1 mutates to become equal to M2, hash(M1) must remain the same while
>> still being different from hash(M2).
>>
>> That means that hash() now is a non-deterministic function. hash([1,2,3])
>> will vary according to how the list [1,2,3] was constructed!
>>
>> Obviously something has to give, because not all of these things are
>> mutually compatible.
>>
>>> If later the given sequence is different, that's
>>> not the dict's problem.
>> Data structures don't have problems. Programmers do. And language
>> designers with sense build languages that minimize the programmers
>> problems, not maximize them.
> 
> Yes, here you talk about a different goal altogether. Here comes the
> 'arbitrary' part I mentioned.
> 
>>> So if the list changes, it will result in a different hash and we will
>>> get a hash-miss. I doubt this is in anyway less intuitive than dis-
>>> allowing mutable items as keys.
>> The choices for the language designer are:
>>
>> (1) Invent some sort of magical non-deterministic hash function which
>> always does the Right Thing.
> 
> Nope, just say if the new sequence is different, you don't find the
> item in the dict.
> 
>> (2) Allow the hash of mutable objects to change, which means you can use
>> mutable objects as keys in dicts but if you change them, you can no
>> longer find them in the dict. They'll still be there, using up memory,
>> but you can't get to them.
> 
> In the new model, at the time of addition, you need to remember the
> key at that time. If it's a list, you make a copy of the items.
> 
Right. Simple. And completely impractical.

>> (3) Simply disallow mutable objects as keys.
>>
>> Alternative 1 is impossible, as we've seen, because the requirements for
>> the Right Thing are not mutually compatible.
>>
>> Alternative (2) leads to hard-to-find, hard-to-diagnose bugs where you
>> store objects in a dict only for them to mysteriously disappear later.
>> Worse, it could lead to bugs like the following hypothetical:
> 
> Of course they can be reached with.. for k in dict...

But that hardly provides the required mapping features. What on earth 
are you thinking?.

>>>>> M = [1, 2, 3]
>>>>> D = {M: 'parrot'} # pretend this works
>>>>> D
>> {[1, 2, 3]: 'parrot'}>>> M.append(4)
>>>>> D
>> {[1, 2, 3, 4]: 'parrot'}>>> D[[1, 2, 3, 4]]
> 
> No, in the new way, the key still remains [1, 2, 3]
> What was changed is M. Not the  key given to dict at the time of
> addition.
> Again I'm not describing today's behavior; it's in the new way.
> 
I doubt this new way, whatever it is, is going to have many disciples.

>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in <module>
>> KeyError: [1, 2, 3, 4]
>>
>> Try explaining that one to programmers: they can SEE the key in the dict
>> when they print it, but they can't get it or delete it because the hash
>> has changed.
> 
> No they don't. They see the key at the time of addition ([1,2,3])
>> Alternative 3 is easy to deal with: simply don't use mutable objects as
>> keys. That's what Python does. Sure, the programmer sometimes needs to
>> work around the lack (convert the list into a tuple, or a string, or
>> pickle it, whatever...) which on rare occasions is hard to do, but at
>> least there are no mysterious, hard to track down bugs.
> 
> When I first saw key's must'be be mutable, it did appear to me to be
> mysterious. There was unnecessary tighter coupling between
> implementation details and the service exposed to the programmer. (As
> I see it, the root cause of all this is, the dict does not make a copy
> of the key at the time of item addition, it just makes a new reference
> to the same object)
> 
Light dawns. Dicts are optimized for PERFORMANCE! And for very good reasons.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From winter at biotec.tu-dresden.de  Wed Sep  5 07:44:46 2007
From: winter at biotec.tu-dresden.de (Christof Winter)
Date: Wed, 05 Sep 2007 13:44:46 +0200
Subject: 2 python questions!
In-Reply-To: <mailman.65.1188984186.2658.python-list@python.org>
References: <mailman.65.1188984186.2658.python-list@python.org>
Message-ID: <46DE96AE.1040402@biotec.tu-dresden.de>

resist_think at hushmail.com wrote:
[...]

> Now the second question has to do with images retrieval and 
> manipulation. Which libraries do you propose to work with to 
> retrieve and resize images from the web? 

urllib.urlretrieve() and
Python Imaging Library (PIL)


From Scott.Daniels at Acm.Org  Thu Sep  6 14:00:33 2007
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Thu, 06 Sep 2007 11:00:33 -0700
Subject: Beginners Query - Simple counter problem
In-Reply-To: <WZidnbvgAJstpX3bRVnytgA@bt.com>
References: <WZidnbvgAJstpX3bRVnytgA@bt.com>
Message-ID: <13e0g0id9rlmg71@corp.supernews.com>

David Barr wrote:
> I am brand new to Python (this is my second day), and the only 
> experience I have with programming was with VBA.  Anyway, I'm posting 
> this to see if anyone would be kind enough to help me with this (I 
> suspect, very easy to solve) query.
> 
> The following code is in a file which I am running through the 
> interpreter with the execfile command, yet it yeilds no results.  I 
> appreciate I am obviously doing something really stupid here, but I 
> can't find it.  Any help appreciated.
> 
> 
> def d6(i):
>     roll = 0
>     count = 0
>     while count <= i:
>         roll = roll + random.randint(1,6)
>         count += 1
> 
>     return roll
> 
> print d6(3)
A) your direct answer: by using <=, you are rolling 4 dice, not 3.
B) Much more pythonic:

import random

def d6(count):
     result = 0
     for die in range(count):
         result += random.randint(1, 6)
     return result

-Scott David Daniels
Scott.Daniels at Acm.Org


From vanrpeterson at gmail.com  Fri Sep  7 09:13:13 2007
From: vanrpeterson at gmail.com (vanrpeterson at gmail.com)
Date: Fri, 07 Sep 2007 06:13:13 -0700
Subject: why should I learn python
In-Reply-To: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
Message-ID: <1189170793.413769.137670@19g2000hsx.googlegroups.com>

Why use Python?
1)Easy to read, debug and think.
2)Same language for batch scripting, server programming and dynamic
web page creation.
3)Libraries like wxPython for desktop and Cherrypy for web
development.
4)Pythonic JavaScript Library Mochikit.
5)Engineered for reality, not corporate proprietary control
(Microsoft).
6)Less code than Java the Huge.
7)Friendly with C for optimization, if necessary.
8)Works well with SQL, especially PostgreSQL.
9)Everybody is using it, even Microsoft with IronPython.
10)One of the dominant languages driving robotics.
11)Works nicely with UNICODE.
12)Liberal license.
13)And lastly, if you hate programming as I do, you will love Python.
Belief is when someone else does the thinking.  ~ Buckminster Fuller




From steve at REMOVE-THIS-cybersource.com.au  Thu Sep 13 11:32:16 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Thu, 13 Sep 2007 15:32:16 -0000
Subject: newbie: self.member syntax seems /really/ annoying
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189604018.520338.162520@57g2000hsv.googlegroups.com>
	<mailman.486.1189693844.2658.python-list@python.org>
Message-ID: <13eim00ha4lf356@corp.supernews.com>

On Thu, 13 Sep 2007 16:30:36 +0200, BJ?rn Lindqvist
wrote:


> And I agree with the OP that the convention is really annoying.
> 
>   self.rect.width = self.foo(self.rect.x + self.rect.y) * self.boo()
> 
> is much less concise than
> 
>   s.rect.width = s.foo(s.rect.x + s.rect.y) * s.boo()


Y do u thnk bng cncis is lwys a gd thng?

Being concise is not always a good thing. I notice that you separate 
terms with spaces, even when Python itself doesn't need them. You also 
are happy to use infix notation, which requires brackets, instead of a 
postfix or RPN language that doesn't. You also have attributes named 
"rect" and "width" instead of "r" and "w":

s.r.w=s.f(s.r.x+s.r.y)*s.b()

There. See how much more readable that isn't?


-- 
Steven


From jzgoda at o2.usun.pl  Fri Sep 14 15:59:52 2007
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Fri, 14 Sep 2007 21:59:52 +0200
Subject: Https conversation - debug?
In-Reply-To: <1189799482.314951.238470@r34g2000hsd.googlegroups.com>
References: <1189799482.314951.238470@r34g2000hsd.googlegroups.com>
Message-ID: <fcephm$hlb$1@nemesis.news.tpi.pl>

Johny napisa?(a):

> Is there any good sniffer for https protocol?
> How can be watched https conversation?

Any packet sniffer will do. Then you have to decrypt the stream. ;)

-- 
Jarek Zgoda
http://jpa.berlios.de/


From ankitanand1986 at gmail.com  Thu Sep 27 14:42:15 2007
From: ankitanand1986 at gmail.com (Ankit)
Date: Thu, 27 Sep 2007 11:42:15 -0700
Subject: Creating Table using Tkinter
Message-ID: <1190918535.924299.22750@k79g2000hse.googlegroups.com>

Hi guys i need to make a table to store a certain data using
Tkinter..I have searched on the group but i have not been able to find
a solution that would work for me..The thing is that i want my table
to be scrollable both horizontally and vertically and i also want to
transmit the data from the table serially to a microcontroller so i
also need to make sure that i am able to read all the data
individually..I am writing my code on Windows..my table is dynamic
that is the number of columns are fixed but the number of rows can
vary that would depend on the user..Initially i ask him about the
number of rows...Waiting for your replies..

Regards
Ankit Anand



From perl4hire at softouch.on.ca  Sat Sep 15 09:39:12 2007
From: perl4hire at softouch.on.ca (Amer Neely)
Date: Sat, 15 Sep 2007 09:39:12 -0400
Subject: Coming from Perl
In-Reply-To: <A7KGi.8106$z_5.484@nlpi069.nbdc.sbc.com>
References: <Cv%Fi.198$372.59@read2.cgocable.net>	<1189644803.816375.269950@y42g2000hsy.googlegroups.com>	<b46Gi.221$372.100@read2.cgocable.net>	<87y7fa52ru.fsf@benfinney.id.au>	<jWaGi.224$372.55@read2.cgocable.net>	<mailman.485.1189691416.2658.python-list@python.org>	<d9cGi.356$372.131@read2.cgocable.net>	<mailman.489.1189695918.2658.python-list@python.org>	<iPcGi.357$372.115@read2.cgocable.net>
	<mailman.490.1189698752.2658.python-list@python.org>
	<KgdGi.2174$tx1.172@read1.cgocable.net>
	<A7KGi.8106$z_5.484@nlpi069.nbdc.sbc.com>
Message-ID: <DeRGi.458$372.61@read2.cgocable.net>

Bryan Olson wrote:
> Amer Neely wrote:
>> This seems to indicate that maybe my host needs to configure Apache to 
>> run python scripts? But I didn't need to do anything with mine.
> 
> Another possibility: If it works on Windows but not Unix, check
> the end-of-line characters. Windows ends each line with the two
> character sequence carriage-return + newline, which in Python
> is "\r\n". Unix uses newline alone, "\n".
> 
> Most Unixies will choke on a #! line with a carriage return.
> The Python interpreter will accept source files with either
> end-of-line on either system, but of course you'll not get
> that far unless the operating system respects the shebang line.
> 
> Maybe you already checked that. Hmmm...other possiblities...
> 
> Do you have shell access? Can you executing it directly from
> the shell? Do you get a Python error, or some other?
> 
> Did you:  chmod ugo+rx <yourscript>
> 
> Is Python in /usr/bin? What does "which python" say?
> 
> Generally, most experts seem to prefer:
> 
>     #!/usr/bin/env python
> 
> You might try changing the the extension of your script from .py
> to .cgi. Windows uses the .py to choose the executable, but Unix
> does not care; it used the shebang line.
> 
> 

Hmmm. These are interesting suggestions. Especially in light of a new 
wrinkle pointed out by [IV]. That being the script runs fine under my 
Apache at home with no special modules loaded.

I don't have shell access but I can run 'which python' from a Perl 
script, and I will try the different shebang line you suggested.

Thanks for the suggestions.

-- 
Amer Neely
w: www.webmechanic.softouch.on.ca/
Perl | MySQL programming for all data entry forms.
"Others make web sites. We make web sites work!"


From carroll at nospam-tjc.com  Sat Sep 15 01:57:18 2007
From: carroll at nospam-tjc.com (Terry Carroll)
Date: Fri, 14 Sep 2007 22:57:18 -0700
Subject: (wxPython) wx.ProgressDialog - how to cancel out of?
Message-ID: <rvrme3tb8snr5rnqgf5p8g1g4ponp0nbfj@4ax.com>

I'm trying to use wx.ProgressBar, and the cancel button is not
responding.

Here is a simple program that exhibits the problem:

#########################################################
import  wx
import time

max = 10
app = wx.PySimpleApp()
dlg = wx.ProgressDialog("Progress dialog example",
                       "variables to be shown here",
                       maximum = max,
                       style = wx.PD_CAN_ABORT
                        | wx.PD_CAN_SKIP
                        #| wx.PD_APP_MODAL
                        | wx.PD_ELAPSED_TIME
                        | wx.PD_ESTIMATED_TIME
                        | wx.PD_REMAINING_TIME
                        )

keepGoing = True
skip = False
count = 0

while keepGoing and count < max:
    count += 1
    wx.MilliSleep(1000)
    #time.sleep(1)
    newtext = "(before) count: %s, keepGoing: %s, skip: %s " % \
              (count, keepGoing, skip)
    print newtext
    (keepGoing, skip) = dlg.Update(count, newtext)
    newtext = "(after) count: %s, keepGoing: %s, skip: %s " % \
              (count, keepGoing, skip)
    print newtext
dlg.Destroy()
#########################################################

The dialog looks right when this runs, but....  

What's right: I get a progress bar;  it includes "Skip" and "Cancel"
buttons; it shows 10 seconds of progress, and updates once per second
with the variables' values on each iteration.

What's wrong is that I can't get clicking on the "Skip" or "Cancel"
buttons to have any effect.  Instead, as soon as the dialog displays,
I get an hourglass, and it doesn't matter what I click on.  Here's
what the print statements display, consistently, regardless of what I
try to click or whether I click nothing at all:

I:\python>test1.py
(before) count: 1, keepGoing: True, skip: False
(after) count: 1, keepGoing: True, skip: False
(before) count: 2, keepGoing: True, skip: False
(after) count: 2, keepGoing: True, skip: True
(before) count: 3, keepGoing: True, skip: True
(after) count: 3, keepGoing: True, skip: True
(before) count: 4, keepGoing: True, skip: True
(after) count: 4, keepGoing: True, skip: True
(before) count: 5, keepGoing: True, skip: True
(after) count: 5, keepGoing: True, skip: True
(before) count: 6, keepGoing: True, skip: True
(after) count: 6, keepGoing: True, skip: True
(before) count: 7, keepGoing: True, skip: True
(after) count: 7, keepGoing: True, skip: True
(before) count: 8, keepGoing: True, skip: True
(after) count: 8, keepGoing: True, skip: True
(before) count: 9, keepGoing: True, skip: True
(after) count: 9, keepGoing: True, skip: True
(before) count: 10, keepGoing: True, skip: True
(after) count: 10, keepGoing: True, skip: True

Two oddities here: 

1) As I read the docs, the keepGoing variable should be set to True,
unless I click on "Cancel," in which case it should be set to False
(which would end the loop).  That doesn't happen.  This is really what
I'm most concerned here with. 

2) The variable "skip: set to False on the first iteration, and then
set to True on subsequent iterations?  Note that this happens even if
no buttons are selected.  This is just a weirdness to me, and not my
main concern, but I thought I'd mention it in case it's relevant.

You can see some variations in the commented-out code that I tried;
they did not help. 

Relevant software and releases:

OS: Windows XP Home Edition, Version 2002, SP2
Python: ActivePython 2.5.0.0
wxPython: 2.8.1.1 (msw-unicode)

Any help appreciated.


From bborcic at gmail.com  Mon Sep  3 13:06:26 2007
From: bborcic at gmail.com (Boris Borcic)
Date: Mon, 03 Sep 2007 19:06:26 +0200
Subject: SOAP : ZSI error
In-Reply-To: <46DBD73F.6060003@gmail.com>
References: <46DBD73F.6060003@gmail.com>
Message-ID: <fbhf0h$ajv$1@sea.gmane.org>

linuxprog wrote:
> hello i need some help with ZSI module
> i want to use the web service located here 
> www.ebob42.com/cgi-bin/NumberToWordsInDutch.exe/soap/IDutch
> the wsdl file : 
> http://www.ebob42.com/cgi-bin/NumberToWordsInDutch.exe/wsdl/IDutch
> that web service is very simple , the function NumToStr converts numbers 
> to dutch words (description 
> http://www.xmethods.net/ve2/ViewListing.po?key=uuid:01EF9AE1-6DD3-7317-AFA5-05A8A52FCD56)
> 
> i have generated IDutchservice_services with wsdl2py
> here is my code :
> 
> import IDutchservice_services
> soap = 
> IDutchservice_services.IDutchbindingSOAP("www.ebob42.com/cgi-bin/NumberToWordsInDutch.exe/soap/IDutch")
> ok = IDutchservice_services.NumToStr0Request()
> ok.Num=5
> print soap.NumToStr(ok)
> 
> that prints an error RuntimeError: must specify transport or url 
> startswith https/http
> 
> what's wrong in my script ? thanks

Is "startswith https/http" part of the error message ? What would it refer to ?



From duncan.booth at invalid.invalid  Tue Sep 18 05:15:48 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 18 Sep 2007 09:15:48 GMT
Subject: super, apply, or __init__ when subclassing?
References: <1190100791.740269.62880@k79g2000hse.googlegroups.com>
Message-ID: <Xns99AF686B9F703duncanbooth@127.0.0.1>

"exhuma.twn" <exhuma at gmail.com> wrote:

> So, knowing that in python there is one thing to do something, these
> three different calls must *do* domething different. But what exactly
> *is* the difference?
> 
> ------------ Exampel 1: -----------------------------
> 
> class B(A):
>    def __init__(self, *args):
>       A.__init__(self, args)
> 
> ------------ Exampel 2: -----------------------------
> 
> class B(A):
>    def __init__(self, *args):
>       apply( A.__init__, (self,) + args)
> 
> ------------ Exampel 3: -----------------------------
> 
> class B(A):
>    def __init__(self, *args):
>       super(A,self).__init__(*args)

Yes, they are all different.

The first one calls B's immediate base class but packs all of the 
arguments together into a single tuple. Probably not what you meant.

The second one passes B's positional arguments to its immediate base 
class without messing them up but uses a deprecated function to do it. 
You should use "A.__init__(self, *args)" instead unless you are 
concerned about multiple inheritance.

The third one skips over the __init__ method in the immediate base class 
and calls the __init__ method in whatever class follows A in the MRO 
instead. Probably not what you meant either.


From rcdailey at gmail.com  Tue Sep 25 10:45:06 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Tue, 25 Sep 2007 09:45:06 -0500
Subject: Confused about 'positive lookbehind assertion'
In-Reply-To: <59e9fd3a0709250252ja00fc7cx3927b2b19c31df01@mail.gmail.com>
References: <496954360709241938k6baf1009gc7cab215ad16b12f@mail.gmail.com>
	<59e9fd3a0709250252ja00fc7cx3927b2b19c31df01@mail.gmail.com>
Message-ID: <496954360709250745w307275a2sf2b0fd6ef8b5b536@mail.gmail.com>

I think I get it... it's really just a way (so it seems) to make characters
get added to the found groups as they're matched. Thanks for your help.

On 9/25/07, Andrew Durdin <adurdin at gmail.com> wrote:
>
> On 9/25/07, Robert Dailey <rcdailey at gmail.com> wrote:
> > Hi,
> >
> > I've been reading the python documentation on 'positive lookbehind
> > assertion' and I don't understand at all how it works. The python docs
> give
> > the following example:
> >
> > " (?<=abc)def will find a match in "abcdef", since the lookbehind will
> back
> > up 3 characters and check if the contained pattern matches."
> >
> > Can anyone emphasize more on what this RE operation does? Thanks.
>
> It ensures that the regex will only match following the string in the
> lookbehind group, but without capturing that string.
>
> As the docs say, "(?<=abc)def" will match "abcdef"; but it will not
> match "def" (as the "abc" is not there).  If it does match,  the 0th
> group in the match object will be "def".
>
> In contrast, the regex "abcdef" will also match "abcdef" and not
> "def", but the 0th group will be "abcdef".
>
> The negative lookbehind is the opposite -- e.g. "(?<!abc)def" will
> match "def" but not "abcdef".
>
> Cheers,
>
> Andrew
>
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From pablo at decode.com.ar  Wed Sep 26 14:13:25 2007
From: pablo at decode.com.ar (Pablo Ziliani)
Date: Wed, 26 Sep 2007 15:13:25 -0300
Subject: regex with specific list of string
In-Reply-To: <1190827835.3397.76.camel@dot.uniqsys.com>
References: <1190821357.753909.178210@50g2000hsm.googlegroups.com>	<fde2i4$9k1$1@sea.gmane.org>
	<1190827835.3397.76.camel@dot.uniqsys.com>
Message-ID: <46FAA145.8050406@decode.com.ar>

Carsten Haese wrote:
> On Wed, 2007-09-26 at 12:49 -0400, Steve Holden wrote:
>> james_027 wrote:
>>> hi,
>>>
>>> how do I regex that could check on any of the value that match any one
>>> of these ... 'jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug',
>>> 'sep', 'oct', 'nov', 'dec'
>>>
>>> Thanks
>> >>> patr = re.compile('jan|feb|mar|apr|may|jun|jul|aug|sep|nov|oct|dec')
>> >>> patr.match("jul")
>> <_sre.SRE_Match object at 0x7ff28ad8>
>> >>> patr.match("nosuch")
>
> Unfortunately, that also matches margarine, mayonnaise, and octopus,
> just to name a few ;-)

(and so does the solution you sent before :)

This is fine IMO since the OP didn't specify the opposite.

BTW in my previous post I included an example that ensures that the 
search month matches the beginning of a word. That was based in that 
maybe he wanted to match e.g. "dec" against "December" (BTW, it should 
have been r'\b(?:Jan|Feb|...)' instead). To always match a whole word, a 
trailing \b can be added to the pattern OR (much better) if the month 
can appear both in its abbreviated and full form, he can use the 
extensive set as follows (I hope this is clear, excuse my Thunderbird...):

 >>> pattern = r"\b(?:%s)\b" % '|'.join(calendar.month_name[1:13] + 
calendar.month_abbr[1:13])
 >>> pattern
'\\b(?:January|February|March|April|May|June|July|August|September|October|November|December|Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\\b'
 >>> target = "Unlike Julia, I like apricots with mayo in august or sep"
 >>> target
'Unlike Julia, I like apricots with mayo in august or sep'
 >>> re.findall(pattern, target, re.IGNORECASE)
['august', 'sep']
 >>> re.search(pattern, target, re.IGNORECASE)
<_sre.SRE_Match object at 0xb7ced640>
 >>> re.findall(pattern, target, re.IGNORECASE)
['august', 'sep']


Regards,
Pablo


From super.sgt.pepper at gmail.com  Fri Sep 21 20:00:03 2007
From: super.sgt.pepper at gmail.com (Cristian)
Date: Sat, 22 Sep 2007 00:00:03 -0000
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <mailman.903.1190417280.2658.python-list@python.org>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<mailman.900.1190414696.2658.python-list@python.org>
	<1190415741.380795.259050@y42g2000hsy.googlegroups.com>
	<mailman.903.1190417280.2658.python-list@python.org>
Message-ID: <1190419203.278640.301440@g4g2000hsf.googlegroups.com>

On Sep 21, 4:27 pm, "J. Cliff Dyer" <j... at sdf.lonestar.org> wrote:
> Cristian wrote:
> > On Sep 21, 3:44 pm, Ron Adam <r... at ronadam.com> wrote:
>
> >> I think key may be to discuss names and name binding with your friend.  How
> >> a name is not the object it self, like a variable is in other languages.
> >> For example show him how an object can have more than one name.  And discus
> >> how names can be bound to nearly anything, including classes and functions.
>
> > I could discuss name binding but it would be great if Python said this
> > itself. After all, you can even bind a module with the foo = bar
> > syntax by using __import__ function. If function definitions followed
> > the same pattern, I think a beginner would subconsciously (maybe even
> > consciously) realize that function names are just like everything
> > else. Actually, this would be helpful for many people. If you come
> > from a language like Java you're used to thinking of attributes and
> > methods as living in different namespaces. I think a new syntax will
> > encourage seasoned programmers think in a more Pythonic way.
>
> However, you still have to solve the problem of using a single-line
> construct (x = y) with a multi-line definition.  That is the essential
> difference that def is designed to solve.  The __import__ trick works
> because import is also a single line construct.
>
> The only proposal given in this thread is using consistent indentation
> within the parentheses, but parentheses are already explicitly designed
> to let you ignore the whitespace rules.  To suddenly create a situation
> in which you have significant whitespace on the right side of an
> assignment statement, and *within parentheses* will break too much code,
> and make the solution unnecessarily ugly.  Multi-line lambdas have been
> rejected because of this very problem, so unless you have a clean
> solution, I think your proposal falls into the category of "would be
> nice, but not in Python."
>
> Cheers,
> Cliff

http://www.artima.com/weblogs/viewpost.jsp?thread=147358

You, Guido, and I all agree that anonymous functions in expressions
are ugly. There's no argument there. I wouldn't expect any self
respecting programmer to do such a thing even if it was available to
them (in Python that is).

I suppose my question is, taking into account the potential of ugly
code that could be created, and the fact that it's technically
feasible, would it still be worth adding anonymous functions to
explicitly show the first order nature of functions and show that
functions are in the same namespace as all other variables?

I suppose a solution could be to allow the my_function = function(foo,
bar): ... syntax but throw a syntax error if the function isn't being
bound to a variable, but that would cause other problems. From that
syntax you would assume that it's possible to create an anonymous
function wherever a variable is expected. That's not very intuitive
either.



From ldo at geek-central.gen.new_zealand  Sat Sep 22 08:05:35 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sun, 23 Sep 2007 00:05:35 +1200
Subject: xml-rpc timeout
References: <2_WdnTQ86eZNY27bnZ2dnUVZ_jCdnZ2d@comcast.com>	<mailman.877.1190396335.2658.python-list@python.org>
	<QYKdnX_tXu5Vj2nbnZ2dnUVZ_qWdnZ2d@comcast.com>
	<mailman.885.1190402534.2658.python-list@python.org>
Message-ID: <fd30ef$ag$2@lust.ihug.co.nz>

In message <mailman.885.1190402534.2658.python-list at python.org>, Steve
Holden wrote:

> Timeouts shouldn't be a normal feature of TCP communications.

On the contrary, they should. How else are you going to detect that the
other side has died?


From timaranz at gmail.com  Mon Sep 24 19:27:54 2007
From: timaranz at gmail.com (timaranz at gmail.com)
Date: Mon, 24 Sep 2007 16:27:54 -0700
Subject: execfile and function call
In-Reply-To: <nPOdnfr6xu2vimXbnZ2dnUVZ_tCrnZ2d@comcast.com>
References: <nPOdnfr6xu2vimXbnZ2dnUVZ_tCrnZ2d@comcast.com>
Message-ID: <1190676474.317212.235710@y42g2000hsy.googlegroups.com>

I'm not sure why it doesn't work, but a better way would be to use the
import statement:

import app_applscrip
app_applscript.createOptionList(applOptions)

Cheers
Tim



From robert.kern at gmail.com  Fri Sep 21 14:05:32 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 21 Sep 2007 13:05:32 -0500
Subject: Odd files; just left behind?
In-Reply-To: <46F38FBC.7090903@chamonix.reportlab.co.uk>
References: <mailman.760.1190205969.2658.python-list@python.org>	<878x725ts7.fsf@pobox.com>	<46F191DF.7000908@jessikat.plus.net>	<46f2bd9b$0$20143$426a74cc@news.free.fr>
	<46F38FBC.7090903@chamonix.reportlab.co.uk>
Message-ID: <fd115g$f12$1@sea.gmane.org>

Robin Becker wrote:
> Bruno Desthuilliers wrote:
>> Robin Becker a ?crit :
>>> John J. Lee wrote:
>>>
>>>> Robin Becker <robin at reportlab.com> writes:
>>>>
>>>>> I see a folder .python-eggs in my home directory on one of our servers
>>>>> with various .so files
>>>>>
>>>>> ~/.python-eggs/MySQL_python-1.2.2-py2.3-freebsd-6.1-SECURITY-i386.egg-tmp/_mysql.so 
>>>>>
>>>>>
>>>>> are these just left behind from some install process?
>>>> Ah, it's about the resource extraction feature of setuptools.  It's
>>>> possible for zipped eggs to contain resources that have to be
>>>> extracted to the filesystem.  It puts them in the directory you saw
>>>> (or somewhere else -- see the docstring in my other reply).
>>>>
>>>> http://peak.telecommunity.com/DevCenter/PkgResources#resource-extraction
>>>> http://peak.telecommunity.com/DevCenter/setuptools#automatic-resource-extraction 
>>>>
>>> .....
>>> Thanks John, but why not clean up?
>>>
>> Does it needs to be "cleaned up" ? .so files (shared libs) *need* to be 
>> extracted from the egg to be usable. Where they are extracted is IIRC 
>> configurable...
> You're right! These files aren't temporary?

They're a cache.

> It seems strange that the python 
> files live with their associated lib/site-packages and the .so files are 
> somewhere entirely different.
> 
> Python 2.3.6 (#1, Jun  7 2007, 10:44:52)
> [GCC 3.4.4 [FreeBSD] 20050518] on freebsd6
> Type "help", "copyright", "credits" or "license" for more information.
>  >>> import MySQLdb
>  >>> print MySQLdb.__file__
> /myhome/PYTHON/lib/python2.3/site-packages/MySQL_python-1.2.2-py2.3-freebsd-6.1-SECURITY-i386.egg/MySQLdb/__init__.pyc
>  >>> import _mysql
>  >>> print _mysql.__file__
> /myhome/.python-eggs/MySQL_python-1.2.2-py2.3-freebsd-6.1-SECURITY-i386.egg-tmp/_mysql.so
>  >>>
> 
> it would seem simpler to have the .so files inside the site-packages and there's 
> the question of why this folder has to be obfuscated (name starts with .). Even 
> if these files are "resources" why should they be assumed to belong to the user?

Because they are unpacked at runtime by the user that imported the module.
Usually, they won't have write access to site-packages.

> I could make the PYTHON folder world usable, but that won't help if I make all 
> other things in myhome private. Surely code resources belong in the same area as 
> the code that uses them.

Well, you can't import a .so from a zip file. Thus they need to be placed
somewhere else. Don't worry about making ~/.python-eggs world readable. When
other users import the package, they will have the .so's unpacked, too.

-- 
Robert Kern

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



From steve at REMOVE-THIS-cybersource.com.au  Tue Sep  4 16:53:06 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Tue, 04 Sep 2007 20:53:06 -0000
Subject: parameter list notation
References: <1188882028.165803.316540@r34g2000hsd.googlegroups.com>
	<1188882641.899594.212400@22g2000hsm.googlegroups.com>
Message-ID: <13drhdial6p58ca@corp.supernews.com>

On Mon, 03 Sep 2007 22:10:41 -0700, TheFlyingDutchman wrote:

> Well I did a search on "Python variable length arguments" and found a
> hit that seems to explain the *fields parameter:
> 
> When you declare an argment to start with '*', it takes the argument
> list into an array.

No it doesn't. 

>>> def test(*args):
...     import array
...     assert type(args) is array.array, "Not an array"
...
>>> test(1, 2, 3)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 3, in test
AssertionError: Not an array




-- 
Steven.


From david at nospam.spam  Sun Sep  2 20:55:31 2007
From: david at nospam.spam (david)
Date: Mon, 03 Sep 2007 10:55:31 +1000
Subject: Getting subprocesses to be hidden on Windows
In-Reply-To: <1188246076.131276.292010@r34g2000hsd.googlegroups.com>
References: <1188246076.131276.292010@r34g2000hsd.googlegroups.com>
Message-ID: <13dmms2dm98dq55@corp.supernews.com>

geoffbache wrote:

> As part of my efforts to write a test tool that copes with GUIs

> This is dead easy on UNIX with virtual displays like Xvfb. 
> Can someone shed any light if it's possible on Windows

Configure the virtual display first:
http://en.wikipedia.org/wiki/Virtual_desktop

Alternatively, run the process in a separate gui.
Terminal Server client is one way to do that.

[david]


From siona at chiark.greenend.org.uk  Tue Sep 11 12:46:13 2007
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 11 Sep 2007 17:46:13 +0100 (BST)
Subject: printing list containing unicode string
References: <1189432793.383166.156710@d55g2000hsg.googlegroups.com>
	<1189477580.214510.212420@22g2000hsm.googlegroups.com>
Message-ID: <Xzg*vgBUr@news.chiark.greenend.org.uk>

Xah Lee  <xah at xahlee.org> wrote:
> "  It's very wasteful of space. In most texts, the majority of the
>code points are less than 127, or less than 255, so a lot of space is
>occupied by zero bytes. "
>
>Not true. In Asia, most chars has unicode number above 255. Considered
>globally, *possibly* today there are more computer files in Chinese
>than in all latin-alphabet based lang.

This doesn't hold water. There are many good reasons for preferring
UTF16 over UTF8, but unless you know you're only ever going to be
handling scripts from Unicode blocks above Arabic, it's reasonable
to assume that UTF8 will be at least as compact. Consider that
transcoding a Chinese file from UTF16 to UTF8 will probably increase
its size by 50% (the CJK ideograph blocks encode to 3 bytes). While
transcoding a document in a Western European langauge the other way
can be expected to increase its size by up to 100% (every single-
byte character is doubled). You'd have to be talking about double to
volume of CJK data before switching from UTF8 to UTF16 becomes even
a break-even proposition space-wise.

(It's curious to note that the average word length in English is
often taken to be 6 letters. Similarly, in UTF8-encoded Chinese the
average word length is 6 bytes....)

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
   "Frankly I have no feelings towards penguins one way or the other"
        -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From torerik81 at gmail.com  Mon Sep  3 15:32:04 2007
From: torerik81 at gmail.com (=?ISO-8859-1?Q?Tor_Erik_S=F8nvisen?=)
Date: Mon, 3 Sep 2007 21:32:04 +0200
Subject: The reverse of encode('...', 'backslashreplace')
Message-ID: <96f089100709031232q74dd6135wb3873ca9915d1504@mail.gmail.com>

Hi,

How can I transform b so that the assertion holds? I.e., how can I
reverse the backslash-replaced encoding, while retaining the str-type?

>>> a = u'?'
>>> b = a.encode('ascii', 'backslashreplace')
>>> b
'\\xe6'
>>> assert isinstance(b, str) and b == '?'

Traceback (most recent call last):
  File "<pyshell#59>", line 1, in <module>
    assert isinstance(b, str) and b == '?'
AssertionError

Regards,
tores


From wizzardx at gmail.com  Tue Sep 11 17:09:34 2007
From: wizzardx at gmail.com (David)
Date: Tue, 11 Sep 2007 23:09:34 +0200
Subject: Python Database Apps
In-Reply-To: <1189536987.259907.68650@e34g2000pro.googlegroups.com>
References: <1189479130.905136.196820@r34g2000hsd.googlegroups.com>
	<mailman.387.1189521302.2658.python-list@python.org>
	<1189536987.259907.68650@e34g2000pro.googlegroups.com>
Message-ID: <18c1e6480709111409lf45217bg1a041ce40d82d933@mail.gmail.com>

> It would help to get a feel of what is the most popular combination
> for people to develop their apps.  It's gonna be a desktop app.  The
> database engine is going to be the critical component.  I like sqlite
> so that I don't need a database server on the client side.  It would
> help though if there is a way to sync between multiple clients to a
> central server database.  That's the tough part.  To give you a better
> idea of what i'm trying to do, I am trying to write an app where
> multiple technicians have an issue tracker that is available both
> offline and online.  I was looking to use sqlite as the local side
> that would sync new and updated issues to a central server when
> online.  Any technician may work on any issue.  Generally they will
> not be working on the same issue at the same time.  The technicians
> are geographically diverse (anywhere in the southeast US, not in an
> office.)

If you have an offline mode then the most important thing to work out
is how to handle conflicts in your data synchronization. You need a
clear logic policy for this, and some means of conflict resolution.
Also all parties need to be consistent and not go out of sync too
badly. Maybe avoid conflicts altogether. eg define exactly what types
of updates can take place offline (record insertions only). Or a
policy where deletes+updates can only be made offline by the
technician that "owns" the issue/has locked it. This approach has a
few issues also.

If the database is relatively small and your data is simple then you
could get away with simple table record comparisons to do syncing
(only works properly for inserts, and you need 'natural keys' for
comparison - updates and deletes are more complicated).

Another (really complicated) way is to use a series of log events,
which your app can commit locally or to the server, and merge incoming
events from the server. This is similar in principle to a SCM like
CVS, subversion, git, bazaar, etc. SVK is probably the closest to your
model (centralised scm, with offline commit mode). This gets
complicated very quickly.


From gigs at hi.t-com.hr  Thu Sep 13 09:59:07 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Thu, 13 Sep 2007 15:59:07 +0200
Subject: recursion
Message-ID: <fcbfnj$lh4$1@ss408.t-com.hr>

Can someone explain me this

 >>> def f(l):
	if l == []:
		return []
	else:
		return f(l[1:]) + l[:1]  # <= cant figure this, how is all sum at the end?



thanks!


From carsten at uniqsys.com  Mon Sep 24 08:31:53 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 24 Sep 2007 08:31:53 -0400
Subject: python variable assignement
In-Reply-To: <1190635944.655293.38290@y42g2000hsy.googlegroups.com>
References: <1190628822.472242.272900@19g2000hsx.googlegroups.com>
	<mailman.975.1190630140.2658.python-list@python.org>
	<1190635944.655293.38290@y42g2000hsy.googlegroups.com>
Message-ID: <1190637113.5618.9.camel@dot.uniqsys.com>

On Mon, 2007-09-24 at 12:12 +0000, mihai wrote:
> [...]
>         id = add(record)
> [...]

Not that this causes your problem, but I'd still like to point out that
'id' is the name of a built-in function. Shadowing built-in names can
lead to surprising behavior.

> Is there a way to see if the names points to the same variables or
> that there are different variables with the same values?

Yes. "==" tests whether two objects are equal, whereas "is" tests
whether two objects are actually the same object. Examples:

Two different list objects with equal contents:

>>> a = [1,2,3]
>>> b = [1,2,3]
>>> a==b
True
>>> a is b
False

Two names for the same list object:

>>> a = [1,2,3]
>>> b = a
>>> a==b
True
>>> a is b
True

Hope this helps,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From iclark at mail.ewu.edu  Mon Sep 17 11:55:42 2007
From: iclark at mail.ewu.edu (Ian Clark)
Date: Mon, 17 Sep 2007 08:55:42 -0700
Subject: curses: x, y positioning
In-Reply-To: <1190035292.415363.22320@50g2000hsm.googlegroups.com>
References: <1189891633.622313.81850@r29g2000hsg.googlegroups.com>	<m9qre35si8tujadfs6d0ukk4f9rhdgvuao@4ax.com>
	<1190035292.415363.22320@50g2000hsm.googlegroups.com>
Message-ID: <fcm81u$cuc$1@sea.gmane.org>

7stud wrote:
> However, now I am having a problem trying to set the color of the text
> that is output:

import curses

def example(screen):
     if curses.has_colors():
         curses.init_pair(1, curses.COLOR_GREEN, curses.COLOR_BLACK)
         curses.init_pair(2, curses.COLOR_YELLOW, curses.COLOR_BLACK)
         curses.init_pair(3, curses.COLOR_RED, curses.COLOR_BLACK)

         screen.addstr(1, 1, 'Hello', curses.color_pair(1))
         screen.addstr(1, 7, 'World', curses.color_pair(2))
         screen.addstr(1, 12, '!!!', curses.color_pair(3) + curses.A_BOLD)
     else:
         screen.addstr(1, 1, 'You don\'t have colors enabled. :(')

     screen.addstr(3, 0, '<Press any key to continue>')
     screen.refresh()
     screen.getch()

if __name__ == '__main__':
     curses.wrapper(example)

Ian



From mccredie at gmail.com  Thu Sep 20 18:36:45 2007
From: mccredie at gmail.com (Matt McCredie)
Date: Thu, 20 Sep 2007 15:36:45 -0700
Subject: re question
In-Reply-To: <46F27AB9.8060007@bigfoot.com>
References: <d6944c490709190517t390086d4m915b77b1cef5055a@mail.gmail.com>
	<46F27AB9.8060007@bigfoot.com>
Message-ID: <9e95df10709201536w46b75a00gb42817b3777ff12d@mail.gmail.com>

On 9/20/07, Ricardo Ar?oz <ricaraoz at gmail.com> wrote:
> Dan Bar Dov wrote:
> > I'm trying to construct a regular expression to match valid IP address,
> > without leading zeroes (i.e
> > 1.2.3.4 <http://1.2.3.4>, 254.10.0.0 <http://254.10.0.0>, but not
> > 324.1.1.1, nor 010.10.10.1 <http://010.10.10.1>)
> >
> > This is what I come up with, and it does not work.
> >
> > r'(^[12]?\d{0,2}\.){3,3}[12]?\d{0,2}'
> >
> > What am I doing wrong?
> > Any common knowledge IP matching RE?
> >
> > Thanks,
> > Dan
> >
>
> r'^[12]\d?\d?.\d{1,3}.\d{1,3}.\d{1,3}$'

so 299.999.999.999 is a valid IP and 34.0.0.1 isn't? Also, the "."s
need to be escaped. Otherwise they match ANY character.

Matt


From rcdailey at gmail.com  Mon Sep 24 16:36:05 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Mon, 24 Sep 2007 15:36:05 -0500
Subject: Python script to optimize XML text
Message-ID: <496954360709241336i43173947sda5245c2d7477ecb@mail.gmail.com>

Hi,

I'm currently seeking a python script that provides a way of optimizing out
useless characters in an XML document to provide the optimal size for the
file. For example, assume the following XML script:

<root>
    <Test></Test>
    <!-- <CommentedOutElement/> -->

    <!-- Do Something Else -->
</root>

By running this through an XML optimizer, the file would appear as:

<root><Test/></root>

Note that the following were changed:
- All comments were stripped from the XML
- All spaces, tabs, carriage returns, and other forms of unimportant
whitespace are removed
- Elements that contain no text or children that are in the form of
<Empty></Empty> use the short-hand method for ending an element body:
<Empty/>

Anyone know of a tool or python script that can perform optimizations like
explained above? I realize I could probably do this with regular expressions
in python, however I was hoping someone already did this work.
-------------- next part --------------
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From basilisk96 at gmail.com  Fri Sep  7 07:06:18 2007
From: basilisk96 at gmail.com (Basilisk96)
Date: Fri, 07 Sep 2007 11:06:18 -0000
Subject: interesting puzzle......try this you will be rewarded...
In-Reply-To: <mailman.214.1189160840.2658.python-list@python.org>
References: <mailman.214.1189160840.2658.python-list@python.org>
Message-ID: <1189163178.673854.34580@w3g2000hsg.googlegroups.com>

On Sep 7, 5:08 am, "Andreas Tawn" <andreas.t... at ubisoft.com> wrote:
>
> Maybe http://www.pythonchallenge.com/?

That's the one, thanks!
---



From mcknight0219 at gmail.com  Sun Sep 16 11:07:12 2007
From: mcknight0219 at gmail.com (Jimmy)
Date: Sun, 16 Sep 2007 08:07:12 -0700
Subject: (curses) issue about inch()
Message-ID: <1189955232.216664.167840@19g2000hsx.googlegroups.com>

hi, all
I attempt to use the function inch() to get the character at the
current position, and compare it with a particular character like :
if screen.inch(x,y) == 'F'
but this method doesn't seem work, can anyone tell me the reason and
how to corrent it
thanks



From cokofreedom at gmail.com  Thu Sep 20 08:37:05 2007
From: cokofreedom at gmail.com (cokofreedom at gmail.com)
Date: Thu, 20 Sep 2007 12:37:05 -0000
Subject: writing to lists within a dictionary
Message-ID: <1190291825.337829.34670@19g2000hsx.googlegroups.com>

I am trying to write a basic anagram system, that takes a text file
line by line and by sorting the string into its alphabetical form
compares it to keys within a dictionary.

If it matches a key I want to add it (in its unordered form) to a list
for that key.

So far this is what I have

import sys, string, fileinput

# takes an item (string) and converts it to its basic alphabetical
form
def getChar( item ):
	item_chars = []
	for i in range(len(item)):
		item_chars.append(item[i])
	item_chars.sort()
	return string.join(item_chars, "")

anagramDict = {}

for line in fileinput.input("fakelist.txt"):
	myLine = line.replace("\n", "") #remove the carriage returns
	myString = getChar(myLine) #get the alphabetical form
	for k in anagramDict.items(): #iterator through the keys in the
dictionary
		if k[0] == myString: #if the key matches our string
			anagramDict[k].append([myLine])#append that k and add the value
this line
	else:
		anagramDict[myString] = [myLine] #else there is no key the same so
make a new one

print anagramDict



From simon at brunningonline.net  Wed Sep  5 08:52:00 2007
From: simon at brunningonline.net (Simon Brunning)
Date: Wed, 5 Sep 2007 13:52:00 +0100
Subject: Multi Heritage with slots
In-Reply-To: <1188994956.570845.269250@w3g2000hsg.googlegroups.com>
References: <1188982916.071976.160170@g4g2000hsf.googlegroups.com>
	<op.tx6f02mvwepdt4@ericb.pragmadev>
	<1188994956.570845.269250@w3g2000hsg.googlegroups.com>
Message-ID: <8c7f10c60709050552p77bce48cx86d5293bd65fcd0@mail.gmail.com>

On 9/5/07, Alexandre Badez <alexandre.badez at gmail.com> wrote:
> I use __slots__ not for memory optimization nor doing java.
> I use __slots__ because my class are used by other lib, and in the
> past, some of them misspell some attributes and involved a very
> annoying comportment of the global application.
> So the objective is only to prevent unwanted dynamism (but not in all
> the application, just some class).

Using slots to prevent the creation of new properties is what Eric
*means* by "doing java". You're trying to write Java style code in
Python, and it's not going to be pretty. Slots are not intended for
this purpose, and they aren't very good for it.

-- 
Cheers,
Simon B.
simon at brunningonline.net
http://www.brunningonline.net/simon/blog/
GTalk: simon.brunning | MSN: small_values | Yahoo: smallvalues


From zentraders at gmail.com  Wed Sep 12 18:07:41 2007
From: zentraders at gmail.com (Zentrader)
Date: Wed, 12 Sep 2007 22:07:41 -0000
Subject: File Parsing Question
In-Reply-To: <mailman.455.1189630858.2658.python-list@python.org>
References: <mailman.455.1189630858.2658.python-list@python.org>
Message-ID: <1189634861.631219.143310@57g2000hsv.googlegroups.com>

I'm assuming you know that python has a file.seek(), but you have to
know the number of bytes you want to move from the beginning of the
file or from the current location.  You could save the length of the
previous record, and use file seek to backup and then move forward,
but it is simpler to save the previous rec or use readlines() if the
file will fit into a reasonable amount of memory.



From inmmike at gmail.com  Tue Sep 11 21:26:47 2007
From: inmmike at gmail.com (inmmike at gmail.com)
Date: Tue, 11 Sep 2007 18:26:47 -0700
Subject: "Variable variable name" or "variable lvalue"
In-Reply-To: <mailman.2168.1187543491.22759.python-list@python.org>
References: <1187199722.618893.281170@r29g2000hsg.googlegroups.com>
	<1187541583.607550.107230@57g2000hsv.googlegroups.com>
	<mailman.2168.1187543491.22759.python-list@python.org>
Message-ID: <1189560407.455008.151080@r34g2000hsd.googlegroups.com>

On Aug 19, 1:10 pm, Gary Herron <gher... at islandtraining.com> wrote:
> inmm... at gmail.com wrote:
> > On Aug 15, 1:42 pm, mfglinux <mfgli... at gmail.com> wrote:
>
> >> Hello to everybody
>
> >> I would like to know how to declare in python a "variable name" that
> >> it is in turn a variable
> >> In bash shell I would wrote sthg like:
>
> >> for x in `seq 1 3`
> >> do
> >>   M$i=Material(x)  #Material is a python class
> >> done
>
> >> Why I need this? Cause I have a python module that obliges me to build
> >> a variable called Period, which should have a variable name of
> >> summands (depends on the value of x)
>
> >> #Let's say x=3, then Period definition is
> >> Period=Slab(Material1(12.5)+Material2(25)+Material3(12.5)) #Slab is a
> >> python class
>
> >> I dont know how to automatize last piece of code for any x
>
> >> thank you
>
> >> Marcos
>
> > Regardless of whether or not this is a "best practice" sometimes it is
> > necessary. For example, I am looping through a dictionary to set some
> > class properties. Anyway, here is what I finally came up with:
>
> > exec "self.%s = '%s'" % (item, plist[item])
>
> Yuck!  Not at all necessary.  Use setattr instead:
>
>    setattr(self, item, plist[item])
>
> That's much cleaner then an exec or eval.  You may also find getattr and
> hasattr useful.
>
> Gary Herron
>
> > A more simple example for setting a variable outside of a class...
>
> > exec '%s = '%s'" % ('variableName', 'variable value')
>
> > Cheers!
> > Mike

Thanks! I'm still getting used to Python's nifty features.



From david at asdf.asdf  Sun Sep  9 21:42:25 2007
From: david at asdf.asdf (bambam)
Date: Mon, 10 Sep 2007 11:42:25 +1000
Subject: concise code (beginner)
References: <13dsvqrqivtf092@corp.supernews.com><13dv4uqqb806ff0@corp.supernews.com>
	<13dvvgk96amhhec@corp.supernews.com><13e1cbetihma1d6@corp.supernews.com>
	<pan.2007.09.07.03.42.06@REMOVE.THIS.cybersource.com.au>
Message-ID: <13e9880q8m0mse9@corp.supernews.com>

I'm testing a series of scripts.
The scripts are testing a series of hardware devices.
The scripts are a sequence of device commands.
The scripts have sequence numbers.

I am adding exception handling to the to the 'inner
platform' that executes sequences.

I am doing this because testing of error cases has
demonstrated that the 'inner platform' is fragile.

http://worsethanfailure.com/Articles/The_Inner-Platform_Effect.aspx

on the other hand:
http://www.amazon.com/gp/cdp/member-reviews/A2M9XZ2UD8ZM40?ie=UTF8&display=public&sort_by=MostRecentReview&page=5
and
http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/207645

In any case, the hardware test instruments are not programmable
in python, and most of them do not have loop constructs in the
platform language.

I'm not sure how you are reading these messages. Can you see the
thread history?

Steve.

"Steven D'Aprano" <steven at REMOVE.THIS.cybersource.com.au> wrote in message 
news:pan.2007.09.07.03.42.06 at REMOVE.THIS.cybersource.com.au...
> On Fri, 07 Sep 2007 12:03:26 +1000, bambam wrote:
>
>> Hi Steven.
>>
>> Looking at your code, why are you naming the value __all__? It looks
>> like a built-in variable?
>
> When you say:
>
> from module import *
>
> Python looks in the module for a list of names called "__all__", and
> imports only the names in that list. It is recommended that your modules
> take advantage of that feature. I'm just using the same name.
>
>
>> Unless there is an automatic way to correctly get the function list, I
>> will probably be better off giving the lines sequence numbers, and
>> generating the function list from that.
>
> I don't understand what you mean by "giving the lines sequence numbers".
> Where do they come from? How do you go from sequence numbers to functions?
>
> As far as I am concerned, the right behavior is for the module containing
> the functions to define which functions need to be tested. Since modules
> aren't actually intelligent, that means some person needs to list the
> functions. Why list the function NAME when you can list the function
> itself?
> 




From http  Fri Sep 14 21:08:00 2007
From: http (Paul Rubin)
Date: 14 Sep 2007 18:08:00 -0700
Subject: How to avoid overflow errors
References: <13em8vnr527rq20@corp.supernews.com>
	<mailman.560.1189817022.2658.python-list@python.org>
Message-ID: <7xmyvoag7j.fsf@ruckus.brouhaha.com>

"Eduardo O. Padoan" <eduardo.padoan at gmail.com> writes:
> Not totally unrelated, but in Py3k, as it seems, overflows are really
> things of the past:
> 
> 
> Python 3.0a1 (py3k:58061, Sep  9 2007, 13:18:37)
> [GCC 4.1.3 20070831 (prerelease) (Ubuntu 4.1.2-16ubuntu1)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> class MyInt(int):
> ...     pass
> ...
> >>> import sys
> >>> MyInt(sys.maxint)
> 2147483647
> >>> MyInt(sys.maxint+1)
> 2147483648

I'd be interested in knowing what happens in 3.0a1 with

  a = itertools.count(sys.maxint)
  print a.next()
  print a.next()


From rodney.maxwell at gmail.com  Thu Sep 13 12:02:25 2007
From: rodney.maxwell at gmail.com (Rodney Maxwell)
Date: Thu, 13 Sep 2007 16:02:25 -0000
Subject: Extended slicing and Ellipsis - where are they used?
Message-ID: <1189699345.436400.233460@g4g2000hsf.googlegroups.com>

The following are apparently legal Python syntactically:
   L[1:3, 8:10]
   L[1, ..., 5:-2]

But they don't seem to work on lists:
>>> l = [0,1,2,3]
>>> l[0:2,3]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: list indices must be integers
>>> l[...]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: list indices must be integers

So where is this extended slicing used?

--
Rodney



From paddy3118 at googlemail.com  Wed Sep 19 18:06:48 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Wed, 19 Sep 2007 22:06:48 -0000
Subject: Sets in Python
In-Reply-To: <1190235483.412972.81280@v23g2000prn.googlegroups.com>
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
	<CeB*qHeVr@news.chiark.greenend.org.uk>
	<1190235483.412972.81280@v23g2000prn.googlegroups.com>
Message-ID: <1190239608.835359.51150@22g2000hsm.googlegroups.com>

On Sep 19, 9:58 pm, Karthik Gurusamy <kar1... at gmail.com> wrote:
>
> Since we know hashing is used, all that is needed is, a well-defined
> way to construct a hash out of a mutable. "Given a sequence, how to
> get a hash" is the problem. If later the given sequence is different,
> that's not the dict's problem.
>
Oh it is possible to construct a hash from a mutable. What is
difficult is creating the same hash when the mutable mutates. Or
indeed working out what it means when a hash key mutates and you
access the dictionary.
Ignoring this gives the programmer a big problem hence the limitation.

I don't think you have a better solution.

- Paddy.



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Sep 19 07:58:45 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 19 Sep 2007 13:58:45 +0200
Subject: lambda-funcs problem
In-Reply-To: <1190201984.062329.182460@k79g2000hse.googlegroups.com>
References: <1190201984.062329.182460@k79g2000hse.googlegroups.com>
Message-ID: <46f10ee8$0$22308$426a34cc@news.free.fr>

dmitrey.kroshko at scipy.org a ?crit :
> hi all,
> I need to create a Python list of lambda-funcs that are dependent on
> the number of the ones, for example
> 
> F = []
> for i in xrange(N):
>     F.append(lambda x: x + i)
> 
> however, the example don't work - since i in end is N-1 it yields x+
> (N-1) for any func.
> 
> So what's the best way to make it valid?

It's a FAQ. The answer is (using list-comp instead of a for loop):

funcs = [lambda x, i=i : x + i for i in xrange(n)]



From carsten at uniqsys.com  Sat Sep 29 11:43:04 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Sat, 29 Sep 2007 11:43:04 -0400
Subject: Program inefficiency?
In-Reply-To: <1191079347.192272.240540@22g2000hsm.googlegroups.com>
References: <1191079347.192272.240540@22g2000hsm.googlegroups.com>
Message-ID: <1191080584.3253.6.camel@localhost.localdomain>

On Sat, 2007-09-29 at 15:22 +0000, hall.jeff at gmail.com wrote:
> [...]
> def replacecycle(starttext):
>     p1= re.compile('(href=|HREF=)+(.*)(#)+(.*)( )+(.*)(">)+')
>     p2= re.compile('(name=")+(.*)( )+(.*)(">)+')
>     p3= re.compile('(href=|HREF=)+(.*)(#)+(.*)(\')+(.*)(">)+')
>     p4= re.compile('(name=")+(.*)(\')+(.*)(">)+')
>     p5= re.compile('(href=|HREF=)+(.*)(#)+(.*)(-)+(.*)(">)+')
>     p6= re.compile('(name=")+(.*)(-)+(.*)(">)+')
>     p7= re.compile('(href=|HREF=)+(.*)(#)+(.*)(<)+(.*)(">)+')
>     p8= re.compile('(name=")+(.*)(<)+(.*)(">)+')
>     p7= re.compile('(href=|HREF=")+(.*)(#)+(.*)(:)+(.*)(">)+')
>     p8= re.compile('(name=")+(.*)(:)+(.*)(">)+')
>     p9= re.compile('(href=|HREF=")+(.*)(#)+(.*)(\?)+(.*)(">)+')
>     p10= re.compile('(name=")+(.*)(\?)+(.*)(">)+')
>     p100= re.compile('(a name=)+(.*)(-)+(.*)(></a>)+')
> [...]

One obvious opportunity for optimization is to compile those re's only
once at the beginning of the program instead of every time
replacecycle() is called (which is inexplicably called 13 times for each
file).

-- 
Carsten Haese
http://informixdb.sourceforge.net




From ruoyu0088 at gmail.com  Tue Sep 25 22:54:18 2007
From: ruoyu0088 at gmail.com (HYRY)
Date: Tue, 25 Sep 2007 19:54:18 -0700
Subject: the address of list.append and list.append.__doc__
Message-ID: <1190775258.351819.24930@22g2000hsm.googlegroups.com>

I have the following questions, I am using Python 2.4.2

>>> a = [1,2,3]
>>> id(a.append)
19167152           #1
>>> id(list.append)
11306608           #1

1. the address of a.append and list.append is different, can I get the
address of list.append from a.append?


>>> id(a.append.__doc__)
19162720
>>> id(a.append.__doc__)
19162336
>>> id(a.append.__doc__)
19162592
>>> id(a.append.__doc__)
19162720
>>> id(list.append.__doc__)
19162336
>>> id(list.append.__doc__)
19162720
>>> id(list.append.__doc__)
19162592
>>> id(list.append.__doc__)
19162336
2. why the address of a.append.__doc__ and list.append.__doc__ change,
this means __doc__ is not a normal string, but something return a
string.



From khemkaamit at gmail.com  Thu Sep  6 01:40:57 2007
From: khemkaamit at gmail.com (Amit Khemka)
Date: Thu, 6 Sep 2007 11:10:57 +0530
Subject: Using wild character
In-Reply-To: <1189054805.447871.213150@y42g2000hsy.googlegroups.com>
References: <1189054805.447871.213150@y42g2000hsy.googlegroups.com>
Message-ID: <1360b7230709052240v2da7ce68p5aae956bb22b8a41@mail.gmail.com>

On 9/6/07, Sreeraj <sreeraj22283 at gmail.com> wrote:
> hi,
>
>  I am a beginner in Python. I wish to know how can i filter a list of
> strings using wild characters.ie
> Lets say i have list countries =
> ["india","africa","atlanta","artica","nigeria"]. I need only the list
> of string starting with 'a'.

There are a few ways of doing so. For some simple operations there are
functions on the strings, If you want some more complex "filtering"
then have a look at Python's regular expression module "re".

example:
>>> l = ["india","africa","atlanta","artica","nigeria"]
>>> al = [c for c in l if c.startswith('a')]     # this is a list comprehension
>>> al
['africa', 'atlanta', 'artica']

To know more about list comprehensions, have a look at:
http://docs.python.org/tut/node7.html#SECTION007140000000000000000

Methods on strings:
http://docs.python.org/lib/string-methods.html#string-methods

Btw, not all of names in your list are countries !

Cheers,





-- 
----
Amit Khemka
website: www.onyomo.com
wap-site: www.owap.in


From tjreedy at udel.edu  Tue Sep 18 22:56:41 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 18 Sep 2007 22:56:41 -0400
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com><dea92f560709021735l2c72d53ew94410fcb33b9b50b@mail.gmail.com><mailman.303.1188779927.28954.python-list@python.org>
	<1190164166.378500.155990@o80g2000hse.googlegroups.com>
Message-ID: <fcq352$u0a$1@sea.gmane.org>


"TheFlyingDutchman" <zzbbaadd at aol.com> wrote in message 
news:1190164166.378500.155990 at o80g2000hse.googlegroups.com...
| On Sep 2, 5:38 pm, "Eduardo O. Padoan" <eduardo.pad... at gmail.com>
| wrote:
| > > No.http://www.artima.com/weblogs/viewpost.jsp?thread=211430
| >
| > Ops, I 
meant:http://www.artima.com/forums/threaded.jsp?forum=106&thread=211200
| >
| > --http://www.advogato.org/person/eopadoan/
| > Bookmarks:http://del.icio.us/edcrypt
|
| "No. We're not changing the CPython implementation much. Getting rid
| of the GIL would be a massive rewrite of the interpreter because all
| the internal data structures (and the reference counting operations)
| would have to be made thread-safe. This was tried once before (in the
| late '90s by Greg Stein) and the resulting interpreter ran twice as
| slow."

Since Guido wrote that, there have been put forth more ideas and interest 
and promises of efforts to remove or revise the GIL or do other things to 
make using multiple cores easier.  (The later being the point of the 
concern over GIL.)

| How much faster/slower would Greg Stein's code be on today's
| processors versus CPython running on the processors of the late
| 1990's?

Perhaps a bit faster, though processor speeds have not increased so much 
the last couple of years.

|And if you decide to answer, please add a true/false response
| to this statement - "CPython in the late 1990's ran too slow".

False by late 1990's standards, True by today's standards ;-).

Most people are not currently bothered by the GIL and would not want its 
speed halved.

In any case, any of the anti-GIL people are free to update Stein's code and 
distribute a GIl-less version of CPython.  (Or to use Jython or 
IronPython.)

tjr







From UrsusMaximus at gmail.com  Mon Sep  3 18:33:52 2007
From: UrsusMaximus at gmail.com (UrsusMaximus at gmail.com)
Date: Mon, 03 Sep 2007 22:33:52 -0000
Subject: Python411 Podcast: Python for Mobile Interfaces
Message-ID: <1188858832.655778.24890@g4g2000hsf.googlegroups.com>

Python for Mobile Interfaces is a clarion call for Pythonistas to
pioneer the future of alternative user interfaces for mobile phones,
PDA's, and wearable computers, including voice recognition, gesture
recognition, and wearable computing.

www.awaretek.com



From http  Mon Sep  3 12:52:11 2007
From: http (Paul Rubin)
Date: 03 Sep 2007 09:52:11 -0700
Subject: Does shuffle() produce uniform result ?
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
	<mailman.243.1187955760.32294.python-list@python.org>
	<tooru_honda-7C82D1.10432725082007@wvnews01.netvigator.com>
	<tooru_honda-58C552.20355225082007@wvnews01.netvigator.com>
	<tooru_honda-978B9E.11304526082007@wvnews01.netvigator.com>
	<slrnfdnojg.inr.apardon@rcpc42.vub.ac.be>
Message-ID: <7xejhfbsjo.fsf@ruckus.brouhaha.com>

Antoon Pardon <apardon at forel.vub.ac.be> writes:
> If I understand correctly that you are using urandom as a random
> generator I wouldn't trust too much on this performance. Urandom
> uses the systemwide entropy-pool. If other programs need this pool
> too, your performance can drop spectaculary. 

No the idea is that once there's enough entropy in the pool to make
one encryption key (say 128 bits), the output of /dev/urandom is
computationally indistinguishable from random output no matter how
much data you read from it.


From steve at REMOVE-THIS-cybersource.com.au  Thu Sep 20 07:46:29 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Thu, 20 Sep 2007 11:46:29 -0000
Subject: Sets in Python
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
	<CeB*qHeVr@news.chiark.greenend.org.uk>
	<1190235483.412972.81280@v23g2000prn.googlegroups.com>
	<13f3m15igkstq2e@corp.supernews.com>
	<1190260923.243865.312190@z24g2000prh.googlegroups.com>
Message-ID: <13f4nclh902f78f@corp.supernews.com>

On Thu, 20 Sep 2007 04:02:03 +0000, Karthik Gurusamy wrote:

> On Sep 19, 7:17 pm, Steven D'Aprano <st... at REMOVE-THIS-
> cybersource.com.au> wrote:
>> On Wed, 19 Sep 2007 20:58:03 +0000, Karthik Gurusamy wrote:
>> > While it's easy to explain the behavior, I think the decision to dis-
>> > allow mutable items as keys is a bit arbitrary. There is no need for
>> > dict to recompute hash
>>
>> What???
>>
>> Of course it does. How else can it look up the key? Because it
>> (somehow) just recognizes that it has seen the key before? How? By
>> magic?
> 
> You answered it yourself later. For a mapping service, hash is just one
> way to do things. What you need is for each item in the collection, a
> unique key.

And does the mapping get access to that unique key (the key's key)? It 
can't keep a mapping of object:key, because if it could do that, it 
wouldn't need the key, it could just keep object:payload.

Since the mapping can't know the key's key, it has to ask the key, and 
that's what the __hash__ method does.


> How you go from the key to the value is not something a programmer needs
> to know.

You are correct. All you need to know is that in Python, you can't use 
lists and sets as keys directly.

You only need to know about the details of the way dicts look up keys if 
you are writing your own class, and you aren't happy with Python's 
default hash for instance objects. It isn't a common task.



> Your mind is set on thinking on hash alone and hence you don't see
> beyond it.

No, these issues exist regardless of the implementation of the mapping. 
Whether you use a hash table or a binary tree of some sort, or a linear 
linked list, or a database, or folders in a filing cabinet.

The behaviour of mutable objects in a mapping is always problematic, 
regardless of the mapping implementation.


>> > (first of all, a user doesn't even need to know if underneath
>> > 'hashing' is used -- the service is just a mapping between one item
>> > to another item).
>>
>> The user doesn't need to know the mechanism, but the dict does. Dicts
>> are implemented as hash tables. I suppose they could be implemented as
>> something else (what? linear lists? some sort of tree?) but the same
>> considerations must be made:
> 
> Oh yes. If the keys are all integers (or any set of items that can be
> ordered), why not an avl. It has guaranteed O(log N) while a hash in
> worst case is O(N).

But both the best and average cases are O(1), which beats AVL trees by a 
lot. Since dicts are used for Python's internals, they are HIGHLY 
optimized and VERY fast. Their O(1) will beat the O(log N) of AVL trees 
easily.

Hash tables can also use keys even if they can't be ordered: {1+2j: None}


> Why you want to tie yourself to the drawbacks of one
> datastructure? Understand your goal is not to provide a hash; but to
> provide a mapping service.

No, the goal of a good language designer is to provide the fastest, most 
lightweight, simplest, most flexible mapping as a built-in. Any old slow, 
heavyweight, complicated, inflexible mapping will not do the job. That 
goal is best provided by a hash table.

If people want additional mappings as well, they can be added as 
libraries. If those libraries are very useful, they can be added to the 
standard library. If they are HUGELY useful, they will become built-ins.

AVL trees are not as flexible or fast as hash tables, and even if they 
were, you would *still* need to resolve the difficulties that occur if 
the keys mutate.


>> the dict must be able to find keys it has
>> seen before. How is the dict supposed to recognise the key if the key
>> has changed?
>>
>> > Since we know hashing is used, all that is needed is, a well-defined
>> > way to construct a hash out of a mutable. "Given a sequence, how to
>> > get a hash" is the problem.
>>
>> Nonsense. That's not the problem. The problem is how to get exactly the
>> same hash when the sequence has changed.
> 
> Yes, if you keep thinking hash is the only tool you got.

Fine, let me re-word it in terms of an AVL.

Suppose you have two lists in an AVL:

L1 = [1, 2, 3]
L2 = [4, 5, 6]
M = avl((L1, True), (L2, False))

The tree M (for mapping) has L1 at the top of the tree, and L2 as the 
right node.

But now, EVERY time ANY mutable object changes, Python has to check 
whether it is a key in EVERY avl, and if so, re-built the tree. Otherwise 
the tree can become corrupt because the AVL invariants are no longer true.

(Consider what happens if we say L1[0] = 999. Now L1 > L2. If you don't 
reorder the avl, M[L2] cannot be reached except by an exhaustive search 
of every node. That means it is no longer an AVL tree, just an inordered 
tree. Might as well save memory and use a linear linked list.)

Needless to say, this will slow down Python just a tad.


Look, you can go back to the archives of 1993 when this was first 
discussed. Nothing has changed since then. Mutable keys are still 
problematic, regardless of the implementation, and the simplest solution 
is to simply prohibit them.

http://www.python.org/search/hypermail/python-1993/0044.html


If you want to use a mutable object as a key, by object identity rather 
than value, then the easy way is to wrap it in an instance:

class Wrapper: # don't even need new-style classes
    pass # or even an __init__

key = Wrapper()
key.payload = [1, 2, 3]
D = {key: "value"}

But of course you can't look up the dict by value, only by identity. But 
that's what you wanted.


Another way is to use this class:

class HashableList(list):
    def __hash__(self):
        return hash(tuple(self))


Have fun, and remember us when you're debugging your code, because you'll 
be doing a lot of it.



-- 
Steven.


From __peter__ at web.de  Tue Sep 25 03:53:22 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 25 Sep 2007 09:53:22 +0200
Subject: strange behavious of the logging module?
References: <fd6n9i$8hc$1@news1.zdv.uni-mainz.de>
	<fd7nf6$g14$02$1@news.t-online.com>
	<1190643051.084144.230220@o80g2000hse.googlegroups.com>
	<fd8l4n$9o1$03$1@news.t-online.com>
	<1190672978.233964.232900@g4g2000hsf.googlegroups.com>
Message-ID: <fdaepi$k6m$00$1@news.t-online.com>

Vinay Sajip wrote:

> This is a known bug, and not specifically related to logging, though
> it sometimes manifests itself via logging:
> 
> http://bugs.python.org/issue1180193

Yup, thanks for looking into it.

Peter


From nospam at nospam.com  Fri Sep 21 23:19:59 2007
From: nospam at nospam.com (Mark T)
Date: Fri, 21 Sep 2007 20:19:59 -0700
Subject: elementtree question
References: <fd0lmi$pm8$1@foggy.unx.sas.com>
	<mailman.898.1190412966.2658.python-list@python.org>
Message-ID: <B9idnbGBOPpFFGnbnZ2dnUVZ_hqdnZ2d@comcast.com>


"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote in message 
news:mailman.898.1190412966.2658.python-list at python.org...
> En Fri, 21 Sep 2007 11:49:53 -0300, Tim Arnold <tim.arnold at sas.com> 
> escribi?:
>
>> Hi, I'm using elementtree and elementtidy to work with some HTML files. 
>> For
>> some of these files I need to enclose the body content in a new div tag,
>> like this:
>> <body>
>>   <div class="remapped">
>>    original contents...
>>   </div>
>> </body>
>>
>> I figure there must be a way to do it by creating a 'div' SubElement to 
>> the
>> 'body' tag and somehow copying the rest of the tree under that 
>> SubElement,
>> but it's beyond my comprehension.
>
> import xml.etree.ElementTree as ET
> source = """<html><head><title>Test</title></head><body>
>  original contents... 2&amp;3 <a href="hello/world">som&#101; text</a>
>  <p>Another paragraph</p>
> </body></html>"""
> tree = ET.XML(source)
> body = tree.find("body")
> newdiv = ET.Element('div', {'class':'remapped'})
> newdiv.append(body)
> bodyidx = tree.getchildren().index(body)
> tree[bodyidx]=newdiv
> ET.dump(tree)
>
> -- 
> Gabriel Genellina
>

The above wraps the body element, not the contents of the body element.  I'm 
no ElementTree expert, but this seems to work:

import xml.etree.ElementTree as ET
source = """<html><head><title>Test</title></head><body>
  original contents... 2&amp;3 <a href="hello/world">som&#101; text</a>
  <p>Another paragraph</p>
</body></html>"""
tree = ET.XML(source)
body = tree.find("body")
newdiv = ET.Element('div', {'class':'remapped'})
for e in body.getchildren():
    newdiv.append(e)
newdiv.text = body.text
newdiv.tail = body.tail
body.clear()
body.append(newdiv)
ET.dump(tree)

Result:

<html><head><title>Test</title></head><body><div class="remapped">
  original contents... 2&amp;3 <a href="hello/world">some text</a>
  <p>Another paragraph</p>
</div></body></html>

-Mark




From jesse.k.rosenthal at gmail.com  Mon Sep 10 20:29:35 2007
From: jesse.k.rosenthal at gmail.com (jesse.k.rosenthal at gmail.com)
Date: Mon, 10 Sep 2007 17:29:35 -0700
Subject: mailbox module, Maildir, and flags
Message-ID: <1189470575.927590.122140@o80g2000hse.googlegroups.com>

Dear all,

I'm trying to figure out if mailbox will let me get the flags of a
Maildir message without running get_message on it, and reading the
whole message. It seems like it should work by doing this:

>>> import mailbox
>>> mybox = mailbox.Maildir('~/Maildir/', mailbox.MaildirMessage)
>>> myfolder = mybox.get_folder('School')
>>> len(myfolder)
2102
>>> msg = myfolder.next()

But then,when I try to get_flags on msg, I get nothing

>>> msg.get_flags()
''

Instead, I have to ener

>>> msg=myfolder.get_message(key)

which reads the whole message. Then the flags show up (RS or
whatever). Given that there's 2102 messages in the folder, and some of
them have attachments, I'd rather run get_message on all of them.

To explain my motivation: I'm writing a curses email client as a
hobby. I started out with IMAP, and implemented a simple caching
behaviour, using a pickled cache. When it logs in to the IMAP server,
it checks only the uids and flags on the server, compares those to the
ones in the cache, and from that can figure out what has been added,
deleted, or changed. From that, it can figure out what headers to
download. Saves a *lot* of time at startup.

I'd like to implement something like this for Maildir. Figure out
which msgs it needs to get a new Message instance for, and only those.
The rest are in the cache. So after the first time, starting up on a
large maildir folder will be pretty quick. Following the same logic, I
just need the unique names and the flags. Now, I know the flags are in
the name, but I can't find anyway in the mailbox module to get them.

So, should I just run some text parsing on the filenames, using
os.listdir? Given:

'1110326951.M818715P9617V0000000000000307I001A45A4_1401.belacqua,S=960:2,RS'

it's easy enough to apply string.split(":2,"). But then I have to deal
with all the nastiness of the maildir standard. This is probably what
I'll end up doing, but I was wondering if the mailbox module had a way
to do it.

One other question. Given a mailbox.Maildir folder like the one above,
is there a way to run through it and just get the headers? Basically,
the opposite of get_payload? I know I can scew around with msg.keys(),
but is there something like

for msg in folder:
    hdr = msg.get_header()

?

Thanks for all your help. Sorry if this was unclear or long-winded.

Best,
Jesse



From __peter__ at web.de  Tue Sep 25 08:24:33 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 25 Sep 2007 14:24:33 +0200
Subject: Raw string printing
References: <1190722082.406690.222540@57g2000hsv.googlegroups.com>
Message-ID: <fdaum1$gua$01$1@news.t-online.com>

Alexandre Badez wrote:

> I would like to do something like:
> 
> s = r"a\tb\n"

> print unraw(s) # <= this is the "magic" function I'm searching for
> # result with
> a    b
> n
> 
> Does any of you know how to do it properly ?

>>> print r"a\tb\nx".decode("string-escape")
a       b
x

Peter


From horpner at yahoo.com  Mon Sep 10 13:44:02 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Mon, 10 Sep 2007 17:44:02 GMT
Subject: Checking if elements are empty
References: <2323A6D37908A847A7C32F1E3662C80E010A0246@dc1ex01.air.org>
	<fbme5d$qa$1@sea.gmane.org>
	<mailman.93.1189003016.2658.python-list@python.org>
	<fbqedh$31g$1@lust.ihug.co.nz>
	<46e115e5$0$7691$9b4e6d93@newsspool2.arcor-online.net>
	<fbsqqs$efc$2@lust.ihug.co.nz>
	<46e2013a$0$7687$9b4e6d93@newsspool2.arcor-online.net>
	<slrnfead5j.mo.horpner@FIAD06.norwich.edu>
	<mailman.321.1189434264.2658.python-list@python.org>
	<slrnfeaoed.b4.horpner@FIAD06.norwich.edu>
	<mailman.329.1189439834.2658.python-list@python.org>
Message-ID: <slrnfeauhp.14c.horpner@FIAD06.norwich.edu>

On 2007-09-10, Chris Mellon <arkanes at gmail.com> wrote:
> On 9/10/07, Neil Cerutti <horpner at yahoo.com> wrote:
>> Agreed; but I prefer 'if y[0] == ""', absent more context and
>> better names.
>
> Probably should use u"" if you're going to take that route, as
> this will fail spuriously if y[0] contains a unicode string
> that can't be implicitly converted to ascii. Personally, I
> prefer the boolean check and I'll let operations fail elsewhere
> if there's a type mismatch.

I have a quibble not with the functionality of the boolean check,
but with its expressiveness. if y[0] == "" expresses more, i.e.,
that I expect y[0] to contain a Python byte string.

-- 
Neil Cerutti


From byte8bits at gmail.com  Fri Sep 21 15:32:03 2007
From: byte8bits at gmail.com (byte8bits at gmail.com)
Date: Fri, 21 Sep 2007 19:32:03 -0000
Subject: RE Help
In-Reply-To: <mailman.886.1190402711.2658.python-list@python.org>
References: <1190399985.324448.242610@d55g2000hsg.googlegroups.com>
	<mailman.884.1190400295.2658.python-list@python.org>
	<1190401551.706792.178450@22g2000hsm.googlegroups.com>
	<mailman.886.1190402711.2658.python-list@python.org>
Message-ID: <1190403123.841267.7000@r29g2000hsg.googlegroups.com>

> You'll want to use a non-greedy match:
> x = re.compile(r"START(.*?)END", re.DOTALL)
> Otherwise the . will match END as well.

On Sep 21, 3:23 pm, Steve Holden <st... at holdenweb.com> wrote:

> Only if there's a later END in the string, in which case the user's
> requirements will determine whether greedy matching is appropriate.
>
> regards
>   Steve

There will be lots of START END combinations in the data. This is more
accurate:

sfgdfg*START*dfhdgh*END*dfdgh*START*dfhfdgh*END*dfgsdh*START*sdfhfdhj*END*fdghfdj

The RE should extract the data between each couples of START and END.

Thanks!





From yalum at earthlink.net  Mon Sep  3 17:41:27 2007
From: yalum at earthlink.net (Fit E. Cal)
Date: Mon, 03 Sep 2007 21:41:27 -0000
Subject: Let's Unite Against Jews and Mongrels!
In-Reply-To: <1188849476.067121.119110@r34g2000hsd.googlegroups.com>
References: <1188198797.772672.60840@r29g2000hsg.googlegroups.com>
	<1188300284.507909.126770@57g2000hsv.googlegroups.com>
	<46D40BFE.2020301@comcast.net>
	<1188744204.822322.198360@57g2000hsv.googlegroups.com>
	<46DAD433.1030503@comcast.net>
	<1188849476.067121.119110@r34g2000hsd.googlegroups.com>
Message-ID: <1188855687.442121.85030@22g2000hsm.googlegroups.com>

On Sep 3, 12:57 pm, devondej... at comcast.net wrote:
> On Sep 2, 9:18 am, "Richard B. Gilbert" <rgilber... at comcast.net>
> wrote:
>
>
> HEY! NOBODY BASHES THE TOOTH FAIRY!
>
-Shrug- I fucked her. mvm



From mail at microcorp.co.za  Thu Sep 20 03:05:36 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 20 Sep 2007 09:05:36 +0200
Subject: Google and Python
References: <1190228512.627109.308910@n39g2000hsh.googlegroups.com>
Message-ID: <00f801c7fb59$3300cca0$03000080@hendrik>

"TheFlyingDutchman" <zz... at aol.com> wrote:


> Around 2000 I heard that Google was using Python to some extent. Now I
> see that Guido Van Rossum works for them as well as Alex Martellis

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

It seems that shortening "Alessandro" to "Alex" was not enough.

I wonder if the Flying Dutchman is another van der Decker?

- Hendrik



From kenneth.m.mcdonald at sbcglobal.net  Sat Sep  1 23:35:44 2007
From: kenneth.m.mcdonald at sbcglobal.net (Kenneth McDonald)
Date: Sat, 01 Sep 2007 22:35:44 -0500
Subject: How best to dynamically define methods (and functions)?
Message-ID: <46DA2F90.7010109@sbcglobal.net>

I can see an obvious but hacky way to define a Python function at 
runtime. I can't see any obvious way to add a method to a class at 
runtime (though I'm sure one could do just about anything by digging 
into the metaclass stuff, which I will do if needed). But pointers to 
cleaner or easier existing ways to do this would be most appreciated.

In case it's of interest in the context of the question, I need to 
define a largish set of functions (and similar methods) that define a 
XML-type markup language. Most of these functions will just be of the form

def fun(...):
    return Node('fun', ...)

so it'd definitely be nice to just create most of them automatically, 
and only do the special cases by hand.


Many thanks,
Ken


From steve at holdenweb.com  Mon Sep 10 16:24:46 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 10 Sep 2007 16:24:46 -0400
Subject: PIL Error: "cannot read interlaced PNG files"
In-Reply-To: <1189449506.496986.88290@y42g2000hsy.googlegroups.com>
References: <1189449506.496986.88290@y42g2000hsy.googlegroups.com>
Message-ID: <fc496d$q5k$1@sea.gmane.org>

T-u-N-i-X wrote:
> Hey There,
> 
> I'm developing an application that lets the user to upload JPG and PNG
> files. I'm using PIL to check the images after the upload (like
> checking it storage size, width and height). But PIL raises an error:
> 
> "cannot read interlaced PNG files"
> 
> It says that interlaced PNG files are not supported in the PIL
> documentation. I'm using PIL 1.1.6-2 on Arch Linux..
> 
> I can check all images with:
> 
> from PIL import Image
> im = Image.open('image.png')
> im.info
> 
> which returns a dictionary about the image. If the dict has
> 'interlace' key with the value 1, then I reject the event that's being
> send with a validation error. But I don't think this is a good idea
> since this could be very annoying for the users.
> 
Perhaps so, but it would seem this is your only viable option short of 
either persuading the effbot to patch PIL to read interlaced PNGs or 
patching it yourself.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From henriklied at gmail.com  Thu Sep 27 07:28:19 2007
From: henriklied at gmail.com (Henrik Lied)
Date: Thu, 27 Sep 2007 11:28:19 -0000
Subject: "No backend servers available" using httplib
In-Reply-To: <46fb7e40$0$29672$426a74cc@news.free.fr>
References: <1190884447.792688.107710@g4g2000hsf.googlegroups.com>
	<46fb7e40$0$29672$426a74cc@news.free.fr>
Message-ID: <1190892499.308111.61600@g4g2000hsf.googlegroups.com>

On Sep 27, 11:56 am, Bruno Desthuilliers <bruno.
42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> Henrik Lied a ?crit :
>
> > Hi there!
>
> > I'm using a recipe found on ASPN [1] to upload some data to an
> > external server.
>
> > The request fails, and all I get in response is "No backend servers
> > available".
>
> > So I'm wondering: Is this a known exception-message in httplib,
>
> If it was, you should have a full traceback then.
>
> > or
> > could it be an error in the requested external resource?
> > [1]:http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/146306
>
>  From the recipe's code and the message, looks like you're connecting to
> (or via) a proxy which fails to relay to the real server.

Hello Bruno,

The actual reason was quite a bit simpler: The receiving server
required a certain keyword to be first in the request - which I was
not aware of. So now it works - but it's not perfect:

Is there a way to stream the file content over the connection? The way
it works now, the whole file is loaded into memory, right?



From bscrivener42 at gmail.com  Fri Sep 14 21:14:26 2007
From: bscrivener42 at gmail.com (BartlebyScrivener)
Date: Sat, 15 Sep 2007 01:14:26 -0000
Subject: vi and python
In-Reply-To: <mailman.559.1189816527.2658.python-list@python.org>
References: <mailman.559.1189816527.2658.python-list@python.org>
Message-ID: <1189818866.523024.196320@g4g2000hsf.googlegroups.com>

On Sep 14, 7:35 pm, "Danyelle Gragsone" <ladyni... at gmail.com> wrote:
> Good Evening,
>
> I am running gentoo.  I want to use vi to program in python.  I
> wondered are there any other gentooovians out there who know if python
> support is already installed.

http://tinyurl.com/2mzakm

rd



From khemkaamit at gmail.com  Tue Sep  4 07:03:05 2007
From: khemkaamit at gmail.com (Amit Khemka)
Date: Tue, 4 Sep 2007 16:33:05 +0530
Subject: TypeError: 'module object is not callable'
In-Reply-To: <1188903123.701882.205780@o80g2000hse.googlegroups.com>
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<46dbd11e$0$6228$426a74cc@news.free.fr>
	<mailman.317.1188812089.28954.python-list@python.org>
	<1188816626.021956.281040@22g2000hsm.googlegroups.com>
	<5k2cjmF1r2aiU1@mid.uni-berlin.de>
	<1188836008.656284.76160@o80g2000hse.googlegroups.com>
	<46dc6f49$0$6207$426a34cc@news.free.fr>
	<1188900397.459760.259580@k79g2000hse.googlegroups.com>
	<mailman.19.1188901489.2658.python-list@python.org>
	<1188903123.701882.205780@o80g2000hse.googlegroups.com>
Message-ID: <1360b7230709040403l20f3290k3b1624bdffba8bd4@mail.gmail.com>

On 9/4/07, cjt22 at bath.ac.uk <cjt22 at bath.ac.uk> wrote:
> On Sep 4, 11:24 am, "Amit Khemka" <khemkaa... at gmail.com> wrote:
> > On 9/4/07, Chris.T... at jet.uk <Chris.T... at jet.uk> wrote:
> >
> > > Thanks guys. Changing to how Python does things has a lot of geting
> > > used to!
> > > Do any of you have any ideas on the best way to do the following
> > > problem:
> >
> > > Each loop I perform, I get a new list of Strings.
> > > I then want to print these lists as columns adjacent to each other
> > > starting with the first
> > > created list in the first column and last created list in the final
> > > column.
> >
> > > If you need any more information, just let me know!
> > > Cheers
> >
> > If I understand correctly what you may want is:
> >
> > >>> l =  ['1', '2', '3', '4']
> >
> > you can do:
> >
> > >>> print "\t".join(l)  # lookup join method in stringmodule,
> >
> > assuming "\t" as the delimiter
> >
> > or,
> >
> > >>> for i in l:
> >
> > ....     print i, '\t' ,   # note the trailing ","
> >
> > If this isnotwhat you want, post an example.
> >
> > Btw, Please post new issues in a separate thread.
> >
> > Cheers,
> > --
> > ----
> > Amit Khemka
> > website:www.onyomo.com
> > wap-site:www.owap.in
>
> I think that is very similar to what I want to do.
> Say I had lists a = ["1" , "2", "3"]  b = ["4", "5", "6"]  c = ["7",
> "8", "9"]
> Stored in another list d = [a,b,c]
> I want the printed output from d to be of the form:
> 1   4   7
> 2   5   8
> 3   6   9
>
> >From what I am aware, there is no table module to do this. The '\t'
> operator looks like it can allow this,
> I am playing with it at the moment, although going for my lunch break
> now!

Have a look at function 'zip' or function 'izip' in module "itertools" .

-- 
----
Amit Khemka
website: www.onyomo.com
wap-site: www.owap.in


From kyosohma at gmail.com  Tue Sep 18 15:33:40 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Tue, 18 Sep 2007 19:33:40 -0000
Subject: Extracting xml from html
In-Reply-To: <46EF769E.4080103@web.de>
References: <1190061079.025479.129070@w3g2000hsg.googlegroups.com>
	<46EF769E.4080103@web.de>
Message-ID: <1190144020.294613.167800@57g2000hsv.googlegroups.com>

On Sep 18, 1:56 am, Stefan Behnel <stefan.behnel-n05... at web.de> wrote:
> kyoso... at gmail.com wrote:
> > I am attempting to extract some XML from an HTML document that I get
> > returned from a form based web page. For some reason, I cannot figure
> > out how to do this.
> > Here's a sample of the html:
>
> > <html>
> > <body>
> > lots of screwy text including divs and spans
> > <Row status="o">
> >     <RecordNum>1126264</RecordNum>
> >     <Make>Mitsubishi</Make>
> >     <Model>Mirage DE</Model>
> > </Row>
> > </body>
> > </html>
>
> > What's the best way to get at the XML? Do I need to somehow parse it
> > using the HTMLParser and then parse that with minidom or what?
>
> lxml makes this pretty easy:
>
>    >>> parser = etree.HTMLParser()
>    >>> tree = etree.parse(the_file_or_url, parser)
>
> This is actually a tree that can be treated as XML, e.g. with XPath, XSLT,
> tree iteration, ... You will also get plain XML when you serialise it to XML:
>
>    >>> xml_string = etree.tostring(tree)
>
> Note that this doesn't add any namespaces, so you will not magically get valid
> XHTML or something. You could rewrite the tags by hand, though.
>
> Stefan

I got it to work with lxml. See below:

def Parser(filename):
    parser = etree.HTMLParser()
    tree = etree.parse(r'path/to/nextpage.htm', parser)
    xml_string = etree.tostring(tree)
    events = ("recordnum", "primaryowner", "customeraddress")
    context = etree.iterparse(StringIO(xml_string), tag='')
    for action, elem in context:
	tag = elem.tag
	if tag == 'primaryowner':
            owner = elem.text
        elif tag == 'customeraddress':
            address = elem.text
        else:
            pass

    print 'Primary Owner: %s' % owner
    print 'Address: %s' % address

Does this make sense? It works pretty well, but I don't really
understand everything that I'm doing.

Mike



From ldo at geek-central.gen.new_zealand  Mon Sep 24 21:13:47 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Tue, 25 Sep 2007 13:13:47 +1200
Subject: An Editor that Skips to the End of a Def
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk> <fd0au1$fro$1@lust.ihug.co.nz>
	<5lhs4pF8bkunU1@mid.individual.net> <fd4168$ige$1@lust.ihug.co.nz>
	<slrnfff9op.1is.horpner@FIAD06.norwich.edu>
Message-ID: <fd9ncb$q3l$1@lust.ihug.co.nz>

In message <slrnfff9op.1is.horpner at FIAD06.norwich.edu>, Neil Cerutti wrote:

> On 2007-09-22, Lawrence D'Oliveiro
> <ldo at geek-central.gen.new_zealand> wrote:
>
>> In message <5lhs4pF8bkunU1 at mid.individual.net>, Bjoern
>> Schliessmann wrote:
>
>>> Nah. Use vim.
>>
>> Every other text editor I have ever used understands that the
>> current position in a file is _between_ two characters (or
>> before the first character, or after the last character), not
>> _on_ a character. But not vi and its ilk.
>>
>> Try the following in vi/vim: Move to some point in the middle
>> of a line. Press "i" to get into insert mode. Press escape to
>> get out again. You'll end up one position to the left of where
>> you were before. Press "i", and then escape again--you've moved
>> another position left. Why is it incapable of keeping track of
>> such a simple thing as your current position in the file?
> 
> That's a silly question. Of course it knows your current
> position--it just chooses to modify your position when you exit
> insert mode.

That's like saying, about a program that, when given "2 + 2", outputs "5",
that _of course_ it knows the correct answer is "4", it just chooses
to "modify" the answer before outputting it.

Why does it "choose" to modify your position when you exit insert mode? Does
the phrase "broken as designed" mean anything to you?

>> Why does it need two different insert commands, "i" versus "a"?
>> Because one of them can't insert at the end of a line, and the
>> other can't insert at the beginning.
> 
> i and a are two of *many* ways to enter insert mode.

Why do you need so many ways to enter insert mode?

>> And why have command-versus-insert mode at all? No other text
>> editor still surviving uses such an antiquated concept.
> 
> The existence of command mode allows plain old keystrokes to be
> commands--it potentially makes commands easier to type.

And the downside is that the largest single proportion of those commands end
up being variations on "enter insert mode". Because most of the keystrokes
you enter during an editing session are in fact text to be input into the
file, not commands to manipulate that text. So in a modal editor, having to
jump in and out of insert mode all the time just adds to the number of
keystrokes you have to type.



From carsten at uniqsys.com  Fri Sep 14 10:23:02 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 14 Sep 2007 10:23:02 -0400
Subject: where is help file?
In-Reply-To: <13el4vvna6jildc@corp.supernews.com>
References: <13el4vvna6jildc@corp.supernews.com>
Message-ID: <1189779782.3377.7.camel@dot.uniqsys.com>

On Fri, 2007-09-14 at 10:00 -0400, PaulS wrote:
> new to Fedora7, typed python in interactive interpreter, then help().  Then 
> modules to get a list of modules.  Then module name to get info on a module 
> but no help file.  What is the help file name?  Is there an environmental 
> variable I have to set?

There is no help file, and no environment variable. The help text is
stored directly inside each module and function that supplies a help
text. Observe:

>>> def f(x):
...   "Calculate the square of x."
...   return x**x
... 
>>> help(f)
Help on function f in module __main__:

f(x)
    Calculate the square of x.
(END) 

Providing such a help text is optional, but all standard library modules
do provide help as far as I know. Consequently, the fact that you have a
module that doesn't provide a help text seems to indicate that it's not
a standard library module. What's the name of the module you're trying
to get help on?

Hope this helps (no pun intended),

-- 
Carsten Haese
http://informixdb.sourceforge.net




From lasses_weil at klapptsowieso.net  Tue Sep  4 14:58:15 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Tue, 04 Sep 2007 20:58:15 +0200
Subject: Noob: What is a slot? Me trying to understand another's code
In-Reply-To: <mailman.31.1188929003.2658.python-list@python.org>
References: <mailman.31.1188929003.2658.python-list@python.org>
Message-ID: <46ddaac8$0$4523$9b4e6d93@newsspool3.arcor-online.net>

Carnell, James E wrote:
> 
> I am thinking about purchasing a book, but wanted to make sure I could
> get through the code that implements what the book is about (Artificial
> Intelligence a Modern Approach). Anyway, I'm not a very good programmer
> and OOP is still sinking in, so please don't answer my questions like I
> really know anything.
> 
> MY QUESTION:
> What is a slot? In class Object below the __init__ has a slot.  Note:
> The slot makes use of a data object called 'percept' that is used in the
> TableDrivenAgent(Agent) at the bottom of this post. I am guessing this
> is a type of Finite State Machine (I haven't bought the book yet so I am
> guessing).
> 
I really have a hard time grasping what it is you don't understand (the 
annoying thing about not understanding stuff is that you usually lack 
the proper terms to explain what you don't understand, precisely 
_because_ you don't understand it ;)).

At first I thought you were talking about __slots__, as explained in the 
docs <URL:http://docs.python.org/ref/slots.html>.

> [but some snipped code later you say:]
> 
> ##################### HERE IS THE SLOT #######################
> 
>     def __init__(self):
>         def program(percept):
>             return raw_input('Percept=%s; action? ' % percept)
>         self.program = program
>         self.alive = True
> 

That is "simply" a special method (namely the one that is called after 
instance creation so you can set up the instance variables).
<nagging>You should really know that.<\nagging>
Lookie here: <URL:http://docs.python.org/ref/customization.html>

Did that do it? Sorry, I have big trouble looking at long listings and 
figuring out their meaning. If that didn't help, try reformulating your 
question (please).

/W


From bert at bertisevil.tv  Thu Sep  6 23:30:55 2007
From: bert at bertisevil.tv (Evil Bert)
Date: Fri, 07 Sep 2007 03:30:55 GMT
Subject: interesting puzzle......try this you will be rewarded...
In-Reply-To: <1189130241.529344.52950@57g2000hsv.googlegroups.com>
References: <1189072576.997085.32360@r29g2000hsg.googlegroups.com>
	<46e04138$0$16377$88260bb3@free.teranews.com>
	<IcYDi.1436$4J3.235@newssvr22.news.prodigy.net>
	<1189130241.529344.52950@57g2000hsv.googlegroups.com>
Message-ID: <PB3Ei.49122$Um6.376@newssvr12.news.prodigy.net>

Basilisk96 wrote:
> I remember seeing a more elaborate puzzle that involved coding,
> cryptography knowledge, etc. to get through it. But what was the link,
> I forget now...

There's this one http://www.inwardhellix.net/

I haven't played it yet so I can't vouch for its quality.  (am playing 
it now)


From iclark at mail.ewu.edu  Thu Sep  6 14:24:34 2007
From: iclark at mail.ewu.edu (Ian Clark)
Date: Thu, 06 Sep 2007 11:24:34 -0700
Subject: Beginners Query - Simple counter problem
In-Reply-To: <1189102450.3376.17.camel@dot.uniqsys.com>
References: <WZidnbvgAJstpX3bRVnytgA@bt.com>	<13e0g0id9rlmg71@corp.supernews.com>
	<1189102450.3376.17.camel@dot.uniqsys.com>
Message-ID: <fbpgl2$qls$1@sea.gmane.org>

Carsten Haese wrote:
> On Thu, 2007-09-06 at 11:00 -0700, Scott David Daniels wrote:
>> def d6(count):
>>      result = 0
>>      for die in range(count):
>>          result += random.randint(1, 6)
>>      return result
> 
> This, of course, can be further improved into:
> 
> def d6(count):
>     return sum(random.randint(1, 6) for die in range(count))
> 

My stab at it:

     >>> def roll(times=1, sides=6):
     ...     return random.randint(times, times*sides)

Ian



From sjmachin at lexicon.net  Sat Sep 22 00:07:49 2007
From: sjmachin at lexicon.net (John Machin)
Date: Fri, 21 Sep 2007 21:07:49 -0700
Subject: Newbie completely confused
In-Reply-To: <mailman.876.1190392492.2658.python-list@python.org>
References: <mailman.876.1190392492.2658.python-list@python.org>
Message-ID: <1190434069.108503.281930@y42g2000hsy.googlegroups.com>

On Sep 22, 2:34 am, Jeroen Hegeman <jeroen.hege... at gmail.com> wrote:
[snip]
> ...processing all 2 files found
> --> 1/2: ./test_file0.txt
> Now reading ...
> DEBUG readLines A took 0.093 s
> ...took 8.85717201233 seconds

Your code does NOT include any statements that could have produced the
above line of output -- IOW, you have not posted the code that you
actually ran. Your code is already needlessly monstrously large.
That's two strikes against anyone bothering to try to nut out what's
going wrong, if indeed anything is going wrong.

[snip]
>
> The original problem showed up using Python 2.4.3 under linux (Fedora
> Core 1).
> Python 2.3.5 on OS X 10.4.10 (PPC) appears not to show this issue(?).

And Python 2.5.1 does what? Strike 3.

>
> P.S. Any ideas on optimising the input to the classes would be
> welcome too ;-)

1. What is the point of having a do-nothing __init__ method? I'd
suggest making the __init__method do the "input".

2. See below

[snip]
>
> class LongClass:
>
>      def __init__(self):
>          return
>      def clear(self):
>          return
>      def input(self, foo, c):
>          self.item0 = float(foo[c]); c += 1
>          self.item1 = float(foo[c]); c += 1
[multiple snips ahead]
>          self.item18 = float(foo[c]); c+=1
>          self.item19 = int(foo[c]); c+=1
>          self.item20 = float(foo[c]); c+=1
>          self.item27 = bool(int(foo[c])); c+=1
>          self.item30 = (foo[c] == "1"); c += 1
>          self.item31 = (foo[c] == "1"); c += 1
>          self.item47 = bool(int(foo[c])); c+=1
>          return c

at global level:

converters = [float] * 48
cvlist = [
    (int, (19, 22, 26, 34, 40, 46)),
    (lambda z: bool(int(z)), (27, 47)),
    (lambda z: z == "1", (30, 31, 36, 37, 42)),
    ]
for func, indexes in cvlist:
    for x in indexes:
        converters[x] = func
enumerated_converters = list(enumerate(converters))

Then:

         def input(self, foo, c):
             self.item = [func(foo[c+x]) for x, func in
enumerated_converters]
             return c + 48

which requires you refer to obj.item[19] instead of obj.item19

If you *must* use item19 etc, then try this:

for x, func in enumerated_converters:
    setattr(self, "item%d" % x, func(foo[c+x]))

You could also (shock, horror) use meaningful names for the
attributes ... include a list of attribute names in the global stuff,
and put the relevant name in as the 2nd arg of setattr() instead of
itemxx.

For handling the bit extraction stuff, either

(a) conversion functions have a 2nd arg which defaults to None and
whose usage depends on the function itself ... would be mask or bit
position (or could be e.g. a scale factor for implied-decimal-point
input)

or

(b) do a loop over the bit positions

HTH,
John



From george.trojan at noaa.gov  Thu Sep 20 09:08:17 2007
From: george.trojan at noaa.gov (George Trojan)
Date: Thu, 20 Sep 2007 09:08:17 -0400
Subject: frange() question
Message-ID: <fctrc1$doh$1@news.nems.noaa.gov>

A while ago I found somewhere the following implementation of frange():

def frange(limit1, limit2 = None, increment = 1.):
     """
     Range function that accepts floats (and integers).
     Usage:
     frange(-2, 2, 0.1)
     frange(10)
     frange(10, increment = 0.5)
     The returned value is an iterator.  Use list(frange) for a list.
     """
     if limit2 is None:
         limit2, limit1 = limit1, 0.
     else:
         limit1 = float(limit1)
     count = int(math.ceil(limit2 - limit1)/increment)
     return (limit1 + n*increment for n in range(count))

I am puzzled by the parentheses in the last line. Somehow they make 
frange to be a generator:
 >> print type(frange(1.0, increment=0.5))
<type 'generator'>
But I always thought that generators need a keyword "yield". What is 
going on here?

George


From aleax at mac.com  Sat Sep  1 21:51:15 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 1 Sep 2007 18:51:15 -0700
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<7xlkbsmqe4.fsf@ruckus.brouhaha.com>
	<1188525647.003223.199620@q5g2000prf.googlegroups.com>
	<mailman.181.1188527203.28954.python-list@python.org>
	<1188537516.622167.115080@z24g2000prh.googlegroups.com>
	<mailman.217.1188577500.28954.python-list@python.org>
	<1188585630.539835.242460@i38g2000prf.googlegroups.com>
	<mailman.234.1188588307.28954.python-list@python.org>
	<1188592039.612652.223700@r23g2000prd.googlegroups.com>
Message-ID: <1i3ryxd.g2pzgq159lt5sN%aleax@mac.com>

Russ <uymqlp502 at sneakemail.com> wrote:
   ...
> > > the inputs. To test the
> > > post-conditions, you just need a call at the bottom of the function,
> > > just before the return,
   ...
> > there's nothing to stop you putting the calls before every return.
> 
> Oops! I didn't think of that. The idea of putting one before every
> return certainly doesn't appeal to me. So much for that idea.

try:
  blah blah with as many return statements as you want
finally:
  something that gets executed unconditionally at the end

You'll need some convention such as "all the return statements are of
the same form ``return result''" (where the result may be computed
differently each time), but that's no different from the conventions you
need anyway to express such things as ``the value that foobar had at the
time the function was called''.


Alex


From steve at holdenweb.com  Fri Sep 21 15:23:09 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 21 Sep 2007 15:23:09 -0400
Subject: RE Help
In-Reply-To: <1190401551.706792.178450@22g2000hsm.googlegroups.com>
References: <1190399985.324448.242610@d55g2000hsg.googlegroups.com>	<mailman.884.1190400295.2658.python-list@python.org>
	<1190401551.706792.178450@22g2000hsm.googlegroups.com>
Message-ID: <fd15mu$tke$2@sea.gmane.org>

chris.monsanto at gmail.com wrote:
> On Sep 21, 2:44 pm, David <wizza... at gmail.com> wrote:
>>> data = "asdfasgSTARTpruyerfghdfjENDhfawrgbqfgsfgsdfg"
>>> x = re.compile('START.END', re.DOTALL)
>> This should work:
>>
>> x = re.compile('START(.*)END', re.DOTALL)
> 
> You'll want to use a non-greedy match:
> 
> x = re.compile(r"START(.*?)END", re.DOTALL)
> 
> Otherwise the . will match END as well.
> 
Only if there's a later END in the string, in which case the user's 
requirements will determine whether greedy matching is appropriate.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From wolf_tracks at invalid.com  Tue Sep 18 22:33:07 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Wed, 19 Sep 2007 02:33:07 GMT
Subject: Tutorial or Example (or Tutorial) of Using Canvas to Produce
	a Plot
In-Reply-To: <9ai0f39lejmjc2qbfcgo1t4h8b3e6ot9jd@4ax.com>
References: <phRHi.50851$Um6.35199@newssvr12.news.prodigy.net>
	<13evohih7rkd030@corp.supernews.com>
	<WPTHi.5906$FO2.4148@newssvr14.news.prodigy.net>
	<13f0b2qlvj5ige6@corp.supernews.com>
	<hnWHi.9038$z_5.1095@nlpi069.nbdc.sbc.com>
	<9ai0f39lejmjc2qbfcgo1t4h8b3e6ot9jd@4ax.com>
Message-ID: <DT%Hi.552$6p6.84@newssvr25.news.prodigy.net>

Thanks. I've arranged for an inter-library loan(ILL), and probably will not 
get his book for several days yet. I've had the book before, but was really 
unable to get the time to pursue it (the ILL). I have his web site 
bookmarked. I do not yet plan to buy his book, web or hardbound yet. Maybe I 
can re-examine his site for examples, and find one that is appropriate.


Richard Townsend wrote:
> On Tue, 18 Sep 2007 13:18:36 -0700, "W. Watson"
> <wolf_tracks at invalid.com> wrote:
> 
>> Tk is it. I'm really not interested in the others at this point.
>>
> 
> John Grayson's book 'Python and Tkinter Programming' has a chapter on
> plotting Graphs and Charts. You can even download that chapter as a
> PDF file:
> 
> http://www.manning-source.com/books/grayson/grayson_ch11.pdf
> 
> See http://www.manning.com/grayson/ for more info about the book.
> 

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From http  Thu Sep 20 11:42:37 2007
From: http (Paul Rubin)
Date: 20 Sep 2007 08:42:37 -0700
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<dea92f560709021735l2c72d53ew94410fcb33b9b50b@mail.gmail.com>
	<mailman.303.1188779927.28954.python-list@python.org>
	<1190164166.378500.155990@o80g2000hse.googlegroups.com>
	<1190241711.344058.238380@57g2000hsv.googlegroups.com>
	<1190242799.954176.279440@22g2000hsm.googlegroups.com>
	<7xps0ew0a8.fsf@ruckus.brouhaha.com>
	<13f3roj6gdfq6b7@corp.supernews.com>
	<7x1wctwg6x.fsf@ruckus.brouhaha.com>
	<mailman.808.1190300290.2658.python-list@python.org>
Message-ID: <7xsl59uyvm.fsf@ruckus.brouhaha.com>

"Chris Mellon" <arkanes at gmail.com> writes:
> > The compute intensive stuff (image rendering and crunching) has
> > already had most of those skerricks pulled out.  It is written in C
> > and assembler
> That means that this part is also unaffected by the GIL.

Right, it was a counterexample against the "speed doesn't matter"
meme, not specifically against the GIL.  And that code is fast because
someone undertook comparatively enormous effort to code it in messy,
unsafe languages instead of Python, because Python is so slow.

> At the really high levels of scalability, such as across a server
> farm, threading is useless. The entire point of threads, rather than
> processes, is that you've got shared, mutable state. A shared nothing
> process (or Actor, if you will) model is the only one that makes sense
> if you really want to scale because it's the only one that allows you
> to distribute over machines. The fact that it also scales very well
> over multiple cores (better than threads, in many cases) is just
> gravy.

In reality you want to organize the problem so that memory intensive
stuff is kept local, and that's where you want threads, to avoid the
communications costs of serializing stuff between processes, either
between boxes or between cores.  If communications costs could be
ignored there would be no need for gigabytes of ram in computers.
We'd just use disks for everything.  As it is, we use tons of ram,
most of which is usually twiddling its thumbs doing nothing (as DJ
Bernstein put it) because the cpu isn't addressing it at that instant.
The memory just sits there waiting for the cpu to access it.  We
actually can get better-than-linear speedups by designing the hardware
to avoid this.  See:
  http://cr.yp.to/snuffle/bruteforce-20050425.pdf
for an example.

> The only hard example I've seen given of the GIL actually limiting
> scalability is on single server, high volume Django sites, and I don't
> think that the architecture of those sites is very scalable anyway.

The stuff I'm doing now happens to work ok with multiple processes but
would have been easier to write with threads.


From deets at nospam.web.de  Wed Sep 12 05:16:52 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 12 Sep 2007 11:16:52 +0200
Subject: setattr vs readonly property
References: <1189588059.059818.301090@y42g2000hsy.googlegroups.com>
Message-ID: <5kpp44F4s7pgU1@mid.uni-berlin.de>

james_027 wrote:

> hi,
> 
> My main purpose for using setattr(object, attr, value) for assign
> values from a dict that has some keys that may not be present on some
> object's attibute, which makes it work for me. My problem is dealing
> with read only attribute like sample_attribute =
> property(f_get=_get_sample_attribute). what approach should I use? Or
> is my first approach In the first place right?

Since read-only properties are very concise written as this:


class Foo(object):
   @property
   def ro_prop(self):
       return "whatever"

I'd say that's the way to go - using __getattr__ for this will lead to
rather convoluted code IHMO.

Diez


From andrew.lee at nymag.com  Thu Sep 13 12:10:03 2007
From: andrew.lee at nymag.com (Andrew F)
Date: Thu, 13 Sep 2007 09:10:03 -0700
Subject: Error in random module, bad installation?
In-Reply-To: <9lghe31glgpq8ge20ko3t1nqui0h9oag2a@4ax.com>
References: <1189635238.655642.233240@g4g2000hsf.googlegroups.com>
	<9lghe31glgpq8ge20ko3t1nqui0h9oag2a@4ax.com>
Message-ID: <1189699803.582384.125320@k79g2000hse.googlegroups.com>

On Sep 13, 12:57 am, Tim Roberts <t... at probo.com> wrote:
> Andrew F <andrew.... at nymag.com> wrote:
> >I'm a linux user and I just upgraded from 2.1 to 2.5 and changed the
> >location of a number of libraries and tools.
>
> >So far I've tracked most errors, but this one has me scratching my
> >head :
>
> >$ which python
> >/usr/local/bin/python
> >$ echo $PYTHONPATH
> >/usr/local/bin/python
>
> PYTHONPATH is supposed to point to the directory containing modules, NOT
> the directory containing the executable.  It should be /lib/python2.5.
>

Thank you both -- it was a combination of the problems.



From fredrik at pythonware.com  Wed Sep 26 09:37:09 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 26 Sep 2007 15:37:09 +0200
Subject: Test-driven development and code size
In-Reply-To: <5lv4t4Faeqk8U1@mid.uni-berlin.de>
References: <fdai0b$7iv$1@news.lysator.liu.se>	<5ls95aF9pq3gU1@mid.uni-berlin.de>	<mailman.1054.1190736712.2658.python-list@python.org>	<fdborn$h5q$1@news.lysator.liu.se>	<87ejgmmgc2.fsf_-_@benfinney.id.au>	<fddcnp$sn9$1@news.lysator.liu.se>
	<5lv4t4Faeqk8U1@mid.uni-berlin.de>
Message-ID: <fddna5$und$1@sea.gmane.org>

Diez B. Roggisch wrote:

> Sounds good to me. IMHO there are two ways one gathers tests:
> 
>  - concrete bugs appear, and one writes a test that reproduces the bug &
> eventually after the fix runs smoothly
> 
>  - new features are planned/implemented, and the tests accompany them right
> from the start, to allow .. .well, to test them :)
> 
> I always found it difficult to "just think" of new tests. Of course if you
> _start_ with TDD, point two is applied right from the start and should
> apply.

an approach that works for me is to start by adding "sanity checks"; 
that is, straightforward test code that simply imports all modules, 
instantiates objects, calls the important methods with common argument 
types/counts, etc, to make sure that the library isn't entirely braindead.

this has a bunch of advantages:

- it gets you started with very little effort (especially if you use
   doctest; just tinker a little at the interactive prompt, and you
   have a first version)
- it gives you a basic structure which makes it easier to add more
   detailed tests
- it gives you immediate design feedback -- if it's difficult to
   think of a even a simple test, is the design really optimal?
- it quickly catches build and installation issues during future
   development (including refactoring).

and probably a few more things that I cannot think of right now.

</F>



From facundobatista at gmail.com  Thu Sep 13 15:08:48 2007
From: facundobatista at gmail.com (Facundo Batista)
Date: Thu, 13 Sep 2007 16:08:48 -0300
Subject: Python tickets summary
In-Reply-To: <e04bdf310709101325o1315adb0pebcb2f33d8313f35@mail.gmail.com>
References: <e04bdf310709101325o1315adb0pebcb2f33d8313f35@mail.gmail.com>
Message-ID: <e04bdf310709131208v307bb273gd47a48779b4db61b@mail.gmail.com>

2007/9/10, Facundo Batista <facundobatista at gmail.com>:

> I modified my tool, whichs makes a summary of all the Python tickets
> (I moved the source where the info is taken from SF to our Roundup).
>
> In result, the summary is now, again, updated daily:

Taking an idea from Jeff Rush, now there're separate listings in
function of the keyword of the ticket.

This way, you can see only the Py3k tickets, or the patchs, etc.

All the listings are accesible from the same pages, start here:

  http://www.taniquetil.com.ar/facundo/py_tickets.html

(remember to refresh)

Any idea to improve these pages is welcomed.

Regards,

--
.    Facundo

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


From __peter__ at web.de  Wed Sep 19 09:09:54 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 19 Sep 2007 15:09:54 +0200
Subject: cannot create my own dict
References: <slrnff260r.43o.hat@se-162.se.wtb.tue.nl>
Message-ID: <fcr732$37n$02$1@news.t-online.com>

A.T.Hofkamp wrote:

> This morning I tried to create my own read-only dictionary, and failed
> miserably.
> I don't understand why, can somebody enlighten me?
> 
> Below is a brute-force experiment that cannot deal with "x in obj", plz read
> the explanation below the code:
> --------------------------------
> class myowndict(object):
>     def __init__(self, mydict):
>         self.mydict = mydict
> 
> # Below is produced with
> # print '\n'.join(['        self.%s = self.mydict.%s' % (v,v)
> #                                         for v in dir(dict)])
> # commented-out functions done by hand
> #
>         #self.__class__ = self.mydict.__class__
>         self.__cmp__ = self.mydict.__cmp__
>         self.__contains__ = self.mydict.__contains__
>         self.__delattr__ = self.mydict.__delattr__
>         self.__delitem__ = self.mydict.__delitem__
>         #self.__doc__ = self.mydict.__doc__
>         self.__eq__ = self.mydict.__eq__
>         self.__ge__ = self.mydict.__ge__
>         self.__getattribute__ = self.mydict.__getattribute__
>         self.__getitem__ = self.mydict.__getitem__
>         self.__gt__ = self.mydict.__gt__
>         self.__hash__ = self.mydict.__hash__
>         #self.__init__ = self.mydict.__init__
>         self.__iter__ = self.mydict.__iter__
>         self.__le__ = self.mydict.__le__
>         self.__len__ = self.mydict.__len__
>         self.__lt__ = self.mydict.__lt__
>         self.__ne__ = self.mydict.__ne__
>         #self.__new__ = self.mydict.__new__
>         self.__reduce__ = self.mydict.__reduce__
>         self.__reduce_ex__ = self.mydict.__reduce_ex__
>         self.__repr__ = self.mydict.__repr__
>         self.__setattr__ = self.mydict.__setattr__
>         self.__setitem__ = self.mydict.__setitem__
>         self.__str__ = self.mydict.__str__
>         self.clear = self.mydict.clear
>         self.copy = self.mydict.copy
>         self.fromkeys = self.mydict.fromkeys
>         self.get = self.mydict.get
>         self.has_key = self.mydict.has_key
>         self.items = self.mydict.items
>         self.iteritems = self.mydict.iteritems
>         self.iterkeys = self.mydict.iterkeys
>         self.itervalues = self.mydict.itervalues
>         self.keys = self.mydict.keys
>         self.pop = self.mydict.pop
>         self.popitem = self.mydict.popitem
>         self.setdefault = self.mydict.setdefault
>         self.update = self.mydict.update
>         self.values = self.mydict.values
> 
>         # end of __init__
> 
> if __name__ == '__main__':
>     fd = myowndict({1:10})
>     print 1 in fd  # FAILS! (with "TypeError: iterable argument required")
> --------------------------------
> 
> I wanted to make my own dictionary. However, a simple element test failed
> (after implementing various __*__ functions), and I cannot figure out why.
> 
> The above code is a brute force attempt, where I forward all methods (except
> __class__, __doc__, __init__, and __new__) to my local 'mydict' object.
> 
> IT STILL FAILS.

__special__ methods are looked up in the class, never in the instance for
newstyle classes:

>>> def class_method(self, *v): print "class"
... 
>>> def inst_method(*v): print "instance"
... 
>>> class B(object):
...     __contains__ = class_method
...     copy = class_method
...     def __init__(self):
...             self.__contains__ = inst_method
...             self.copy = inst_method
... 
>>> 42 in B()
class
False
>>> B().copy()
instance

> So if copying all methods of a native dictionary is not enough, what should I
> do to make my class work as a dictionary WITHOUT deriving from dict (which will
> obviously work).

Write wrappers like

def __contains__(self, value):
    return value in self.mydict

Peter


From steve at REMOVE-THIS-cybersource.com.au  Sun Sep  2 18:53:32 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sun, 02 Sep 2007 22:53:32 -0000
Subject: how can I find out the process ids with a process name
References: <1188761187.522146.192380@y42g2000hsy.googlegroups.com>
Message-ID: <13dmfncmf5pmf7b@corp.supernews.com>

On Sun, 02 Sep 2007 19:26:27 +0000, herman wrote:

> But now I would like to do the programmically in my python script. I
> know I can use ' os.system(cmd)' to execute the command 'ps -ef | grep
> emacs', but how
> can I pipe the output of my 'ps -ef | grep emacs' to my python script
> and then run a regression expression with it to get the process Ids?

Use popen.

>>> f = os.popen('ps ax | grep -i PYTHON')
>>> print f.read()
 1952 ?        Ssl    0:01 /usr/bin/python -E /usr/sbin/setroubleshootd
 2117 ?        S      0:00 python ./hpssd.py
 2376 ?        SN     3:19 /usr/bin/python /usr/sbin/yum-updatesd
18087 pts/4    S+     0:00 python
18115 pts/4    S+     0:00 sh -c ps ax | grep -i PYTHON
18117 pts/4    R+     0:00 grep -i python


There is also a module popen2 which does similar but more advanced things.



-- 
Steven.


From robertoedwins at gmail.com  Wed Sep  5 15:02:26 2007
From: robertoedwins at gmail.com (rieh25)
Date: Wed, 5 Sep 2007 12:02:26 -0700 (PDT)
Subject: ZSI sample and issues with the WSDL
In-Reply-To: <ejhtd3pnqf5i1e21ta36l100304ml1ot7l@4ax.com>
References: <ejhtd3pnqf5i1e21ta36l100304ml1ot7l@4ax.com>
Message-ID: <12508850.post@talk.nabble.com>


I'm not sure I know enough to help you, but who knows, maybe this could be of
help. I think that technology is more complicated (or ureliable) than it
should. Possibly the best thing to do is not to depend upon already built
wsdl facilities, but instead work with a basic webservice routine, and work
with it around wsdl.

For instance:

## message_builder_py:

import sys, httplib

def send_message(m):

  #construct and send the header


  if m['type'] == 'HTTP': webservice = httplib.HTTP(m['page'], 80)
  elif m['type'] == 'HTTPS': webservice = httplib.HTTPS(m['page'], 443)
  webservice.putrequest("POST", m['post'])
  webservice.putheader("Host", m['host'])
  webservice.putheader("Content-type", m['content-type'])
  webservice.putheader("Content-length", "%d" % len(m['message']))
  webservice.putheader("SOAPAction", m['SOAPAction'])


  webservice.endheaders()

  webservice.send(m['message'])

  # get the response

  statuscode, statusmessage, header = webservice.getreply()

  r = {}
  r['Response'] = {'statuscode': statuscode, 'statusmessage': statusmessage}
  r['header'] = header
  r['res'] = webservice.getfile().read()
  return r

###call in another place:

xml = """
<solicitud>
  <usuario>gamazari</usuario>
  <clave>laclave</clave>
  <ejercicio>%s</ejercicio>
  <mes>%s</mes>
</solicitud>
"""

mensaje = {}
mensaje['funcion'] = 'SIAFCatalogoFacturas'
mensaje['funcion atribs'] = [['xmlns',
'http://tempuri.org/SIAFProxyWS/Service1']]
params = []
params += [{'parametro': 'xml', 'type': 'string', 'valor': xml % (anio,
mes)}]
mensaje['parametros'] = params

mensaje['pagina'] = 'sicoindes.minfin.gob.gt'
mensaje['tipo'] = 'HTTPS'
mensaje['post'] = '/SIAFProxyWs/SIAFPService.asmx'
mensaje['host'] = 'sicoindes.minfin.gob.gt'
mensaje['SOAPAction'] =
'"http://tempuri.org/SIAFProxyWS/Service1/SIAFCatalogoFacturas"'

res = context.Funcionalidad.Utilidades.SOAP.message_builder_py(mensaje)


David Ross-6 wrote:
> 
> First two appologies, this is probably not a Python question, more
> SOAP. And second, there is every possibilty I am terminally confused
> having looked at this for two days now.
> 
> What I want is to create a Python SOAP server.  I am using the sample
> which comes with ZSI, namely the Echo.wsdl and associated files.  I
> then follow the instructions in the readme, and I CAN get a python
> client and server to communicate.
> 
> But when I take the WSDL file and try to create a VB.NET program:
> 
>>wsdl.exe /language:VB /out:myProxyClass.vb Echo.wsdl 
> 
> I get:
> 
> Error: Unable to import binding 'EchoServer' from namespace
> 'urn:ZSI:examples'.
>   - Unable to import operation 'Echo'.
>   - Specified cast is not valid.
> 
> So I tried to set up the wsdl to point to my domain:
> 
> 
> <?xml version="1.0" encoding="UTF-8"?>
> <definitions 
>   xmlns="http://schemas.xmlsoap.org/wsdl/"
>   xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"
>   xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/"
>   xmlns:http="http://schemas.xmlsoap.org/wsdl/http/"
>   xmlns:xsd="http://www.w3.org/2001/XMLSchema"
>   xmlns:tns="http://www.me.org/Namespaces"
>   targetNamespace="http://www.me.org/Namespaces" >
> 
>   <message name="EchoRequest">
>     <part name="in_str" type="xsd:string"/>
>   </message>
>   <message name="EchoResponse">
>     <part name="result" type="xsd:string"/>
>   </message>
> 
>   <portType name="EchoServer">
>     <operation name="Echo">
>       <input message="tns:EchoRequest"/>
>       <output message="tns:EchoResponse"/>
>     </operation>
>   </portType>
> 
>   <binding name="EchoServer" type="tns:EchoServer">
>     <soap:binding style="document" 
>                   transport="http://schemas.xmlsoap.org/soap/http"/>
>     <operation name="Echo">
>       <soap:operation soapAction="Echo"/>
>         <input>
>           <soap:body use="literal"/> 
>         </input>
>         <output>
>           <soap:body use="literal"/> 
>         </output>
>     </operation>
>   </binding>
> 
>   <service name="EchoServer">
>     <port name="EchoServer" binding="tns:EchoServer">
>       <soap:address location="http://localhost:7000"/>
>     </port>
>   </service>
> 
> </definitions>
> 
> 
> I get a the same error:
> 
> Error: Unable to import binding 'EchoServer' from namespace
> 'http://www.me.org/Namespaces'.
>   - Unable to import operation 'Echo'.
>   - Specified cast is not valid.
> 
> My problem is that I'm not sure how to edit the ZSI example.  Worse,
> this is pretty much as simple as it seems to get ;-(
> 
> Any pointers would be greatfully received.
> 
> I know I should ask in the MS forumns, but I was hoping someone would
> understand the ZSI example better than I seem to.
> 
> Cheers
> 
> David
> 
> ----
> Note anti-spam in email address...
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 
> 

-- 
View this message in context: http://www.nabble.com/ZSI-sample-and-issues-with-the-WSDL-tf4384788.html#a12508850
Sent from the Python - python-list mailing list archive at Nabble.com.



From bdesth.quelquechose at free.quelquepart.fr  Thu Sep 13 13:52:47 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 13 Sep 2007 19:52:47 +0200
Subject: Python 3K or Python 2.9?
In-Reply-To: <1189700775.661780.292150@50g2000hsm.googlegroups.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<87sl5j5r34.fsf@benfinney.id.au>
	<1189646281.569796.267940@d55g2000hsg.googlegroups.com>
	<87ir6f5mrq.fsf@benfinney.id.au>
	<1189651204.408268.57580@19g2000hsx.googlegroups.com>
	<1i4dddf.piaojwz9lz40N%aleax@mac.com>
	<1189700775.661780.292150@50g2000hsm.googlegroups.com>
Message-ID: <46e97917$0$9014$426a74cc@news.free.fr>

TheFlyingDutchman a ?crit :
> Well I'm with Bruce Eckel - there shouldn't be any argument for the
> object in the class method parameter list.

def fun(obj, *args, **kw):
   # generic code here that do something with obj

import some_module
some_module.SomeClass.fun = fun

This is why uniformity is important.

But anyway, I think it's quite clear that Python won't drop the explicit 
self, so it looks like you have to live with it or choose another language.

> Bruce said that no other mainstream OO language is explicitly passing
> the object as a parameter to class methods.

to methods. class methods gets the class as first parameter.

Anyway, there are a lot of things that Python doesn't do like "other 
mainstream OO languages", and that's a GoodThing.


> What I would like to have seen added to class definitions was the
> forced declaration of all object variables in the class outside of
> methods. I don't like the fact that they have to be, and can be
> created in any method on the fly.

I definitively think you'd be happier with some other language.


From ldo at geek-central.gen.new_zealand  Mon Sep 24 00:23:46 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 24 Sep 2007 16:23:46 +1200
Subject: database persistence with mysql, sqlite
References: <1190502677.970811.181100@22g2000hsm.googlegroups.com>
Message-ID: <fd7e4i$g31$3@lust.ihug.co.nz>

In message <1190502677.970811.181100 at 22g2000hsm.googlegroups.com>, coldpizza
wrote:

> So far, with mysql I use 'SELECT * FROM TABLE LIMIT L1, L2' where L1
> and  L2 define the range for the 'Next' and 'Previous' commands. I
> have to run the query every time a click a 'Next/Prev' link. But I am
> not sure that this is the best and most efficient way.

Try it first, then see what happens. Remember, premature optimization is the
root of all (programming) evil.


From tjreedy at udel.edu  Sat Sep  1 12:34:05 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 1 Sep 2007 12:34:05 -0400
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com><-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com><1188364909.397692.209170@q4g2000prc.googlegroups.com><1188367108.393207.241970@g4g2000hsf.googlegroups.com><1188369928.755777.142690@i38g2000prf.googlegroups.com><46d75191$0$401$426a74cc@news.free.fr><1188518054.298017.90610@x35g2000prf.googlegroups.com><46d76595$0$4013$426a74cc@news.free.fr><1188523589.736146.263510@l22g2000prc.googlegroups.com><1i3o9kr.2gmni61g62moaN%aleax@mac.com><7xwsvcc9yz.fsf@ruckus.brouhaha.com><1i3p8lm.19738kn1q0gkouN%aleax@mac.com><1188587846.687895.69240@q5g2000prf.googlegroups.com><38rmq4-cq.ln1@strongwill.g2ctech><46d903db$0$19580$4c368faf@roadrunner.com>
	<026201c7ec75$07d6e0c0$03000080@hendrik>
Message-ID: <fbc49s$qgs$1@sea.gmane.org>


"Hendrik van Rooyen" <mail at microcorp.co.za> wrote in message 
news:026201c7ec75$07d6e0c0$03000080 at hendrik...
| This really intrigues me - how do you program a dam?  - and why is it
| critical?
|
| Most dams just hold water back.

Most big dams also generate electricity.  Even without that, dams do not 
just hold water back, they regulate the flow over a year or longer cycle. 
A full dam is great for power generation and useless for flood control.  An 
empty dam is great for flood control and useless for power generation.  So 
both power generation and bypass release must be regulated in light of 
current level, anticipated upstream precipitation, and downstream 
obligations.  Downstream obligations can include both a minimum flow rate 
for downstream users and a maximum rate so as to not flood downstream 
areas.

tjr





From aleax at mac.com  Wed Sep 12 12:43:57 2007
From: aleax at mac.com (Alex Martelli)
Date: Wed, 12 Sep 2007 09:43:57 -0700
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr>
	<Xns99A98AE12D514duncanbooth@127.0.0.1>
	<1i4bjb8.63ihk49vs6c8N%aleax@mac.com>
	<mailman.446.1189612813.2658.python-list@python.org>
Message-ID: <1i4bm7a.1s51u591kreqe4N%aleax@mac.com>

Chris Mellon <arkanes at gmail.com> wrote:
   ...
> > Actually you could do the "magic first-parameter insertion" just when
> > returning a bound or unbound method object in the function's __get__
> > special method, and that would cover all of the technical issues you
   ...
> This would mean that mixing functions and methods would have to be
> done like you do it in C++, with lots of careful knowledge and
> inspection of what you're working with.

Not particularly -- it would not require anything special that's not
required today.

> What would happen to stuff
> like inspect.getargspec?

It would return the signature of the function, if asked to analyze a
function, and the signature of the method, if asked to analyze a method.
Not exactly rocket science, as it happens.


> Besides, if self isn't in the argument spec, you know that the very
> next thing people will complain about is that it's not implicitly used
> for locals,

Whether 'self' needs to be explicit as a function's first argument, and
whether it needs to be explicit (as a "self." ``prefix'') to access
instance variables (which is what I guess you mean here by "locals",
since reading it as written makes zero sense), are of course separate
issues.

> and I'll punch a kitten before I accept having to read
> Python code guessing if something is a global, a local, or part of
> self like I do in C++.

Exactly: the technical objections that are being raised are bogus, and
the REAL objections from the Python community boil down to: we like it
better the way it is now.  Bringing technical objections that are easily
debunked doesn't _strengthen_ our real case: in fact, it _weakens_ it.
So, I'd rather see discussants focus on how things SHOULD be, rather
than argue they must stay that way because of technical difficulties
that do not really apply.

The real advantage of making 'self' explicit is that it IS explicit, and
we like it that way, just as much as its critics detest it.  Just like,
say, significant indentation, it's a deep part of Python's culture,
tradition, preferences, and mindset, and neither is going to go away (I
suspect, in fact, that, even if Guido somehow suddenly changed his mind,
these are issues on which even he couldn't impose a change at this point
without causing a fork in the community).  Making up weak technical
objections (ones that ignore the possibilities of __get__ or focus on
something so "absolutely central" to everyday programming practice as
inspect.getargspec [!!!], for example;-) is just not the right way to
communicate this state of affairs.


Alex


From thanosv at gmail.com  Tue Sep 18 09:22:51 2007
From: thanosv at gmail.com (thanosv at gmail.com)
Date: Tue, 18 Sep 2007 06:22:51 -0700
Subject: Looking for web software in Python.
In-Reply-To: <mailman.691.1190080412.2658.python-list@python.org>
References: <mailman.691.1190080412.2658.python-list@python.org>
Message-ID: <1190121771.527196.193960@50g2000hsm.googlegroups.com>

On Sep 17, 9:53 pm, Kevin Ar18 <kevina... at hotmail.com> wrote:
> Are any of the following pieces of web software available in Python (under a non-copyleft license like BSD or MIT or Python license)?
>
> Mailing list - with web accessable archive and list maintenance.
> Source control
> Wiki System
>
> Again, only non-copyleft licenses like MIT, BSD, or public domain.
>
> Or would I be better off with PHP?
>
> BTW, does anyone know where that project is that was working on a forum made with Python?
> _________________________________________________________________
> More photos; more messages; more whatever - Get MORE with Windows Live? Hotmail?. NOW with 5GB storage.http://imagine-windowslive.com/hotmail/?locale=en-us&ocid=TXT_TAGHM_m...

Mailman and Trac cover your needs.




From ldo at geek-central.gen.new_zealand  Sat Sep  1 02:44:30 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 01 Sep 2007 18:44:30 +1200
Subject: So what exactly is a complex number?
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
	<mailman.212.1188576194.28954.python-list@python.org>
	<451mq4-les.ln1@ozzie.tundraware.com>
	<46d89ba9$0$30380$9b4e6d93@newsspool4.arcor-online.net>
	<fbamkq$r7q$5@lust.ihug.co.nz>
	<roy-4D87D2.00061301092007@news.panix.com>
Message-ID: <fbb1jp$evf$4@lust.ihug.co.nz>

In message <roy-4D87D2.00061301092007 at news.panix.com>, Roy Smith wrote:

> In article <fbamkq$r7q$5 at lust.ihug.co.nz>,
>  Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> wrote:
> 
>> In message <46d89ba9$0$30380$9b4e6d93 at newsspool4.arcor-online.net>,
>> Wildemar Wildenburger wrote:
>> 
>> > Tim Daneliuk wrote:
>> >> 
>> >> One of the most common uses for Complex Numbers is in what are
>> >> called "vectors".  In a vector, you have both an amount and
>> >> a *direction*.  For example, I can say, "I threw 23 apples in the air
>> >> at a 45 degree angle".  Complex Numbers let us encode both
>> >> the magnitude (23) and the direction (45 degrees) as a "number".
>> >> 
>> > 1. Thats the most creative use for complex numbers I've ever seen. Or
>> > put differently: That's not what you would normally use complex numbers
>> > for.
>> 
>> But that's how they're used in AC circuit theory, as a common example.
> 
> But, if I talk about complex impedance in an AC circuit, I'm measuring two
> fundamentally different things; resistance and reactance.  One of these
> consumes power, the other doesn't.  There is a real, physical, difference
> between these two things. When I talk about having a pole in the 
> left-hand plane, it's critical that I'm talking about negative values for
> the real component.  I can't just pick a different set of axis for my
> complex plane and expect things to still make sense.

In other words, there is a preferred coordinate system for the vectors. Why
does that make them any the less vectors?



From erik at myemma.com  Sat Sep 15 12:09:05 2007
From: erik at myemma.com (Erik Jones)
Date: Sat, 15 Sep 2007 11:09:05 -0500
Subject: Python 3K or Python 2.9?
In-Reply-To: <uir6ctto7.fsf@yahoo.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<uir6ctto7.fsf@yahoo.com>
Message-ID: <9AA6015D-67C7-4D4D-A039-BFBB04607E50@myemma.com>

On Sep 14, 2007, at 11:54 PM, David Trudgett wrote:

> TheFlyingDutchman <zzbbaadd at aol.com> writes:
>
>> The confusing way about the current Python method when you first
>> encounter it is
>>  why is "self" being passed in when you write the function but not
>> when you call it. If the compiler is smart enough to know that
>>
>>     a = MyClass()
>>     a.SomeFunction(12)
>>
>> SomeFunction() has a "self" implicitly added to the parameter  
>> list, it
>> seems that it should be smart enough to know that a function defined
>> in a class has a "self" implicitly added to the parameter list.
>
> Several languages use the "object.method(args)" form, which is  
> syntactic
> sugar for "method(object, other_args)" which Ada, for instance, uses.
> Knowing this clears up half the confusion (the object /is/ passed as a
> parameter whichever syntax is used).
>
> The other half of the confusion is cleared up by considering that
> Python methods are ordinary functions that don't magically "know" in
> which "class" context they are executing: they must be told via the
> first parameter.

Yes, that is really the crux of the issue, though.  While the former  
may be syntactic sugar for the latter, once any syntactic sugar has  
become prevalent enough, it becomes the expected norm and the latter  
becomes clutter or, at best, awkward.  It's something that really  
just takes a little use until you get to the point where you don't  
usually think of it but, every so often, the thought creeps in.  I'm  
not complaining, just pointing out if you step out of this particular  
box, you'll realize that it really is a pointless one.  Saying,  
"because that's how Python does it" may be the only valid reason, but  
that argument is about on par with a six year old's "just because...".



Erik Jones

Software Developer | Emma?
erik at myemma.com
800.595.4401 or 615.292.5888
615.292.0777 (fax)

Emma helps organizations everywhere communicate & market in style.
Visit us online at http://www.myemma.com




From rave247 at seznam.cz  Thu Sep  6 14:50:09 2007
From: rave247 at seznam.cz (=?us-ascii?Q?rave247=20rave247?=)
Date: Thu, 06 Sep 2007 20:50:09 +0200 (CEST)
Subject: =?us-ascii?Q?Re=3A=20Getting=20original=20working=20directory?=
In-Reply-To: <1189102614.459515.206700@57g2000hsv.googlegroups.com>
Message-ID: <1658.1882-17889-484690911-1189104609@seznam.cz>

> One of the best portable ones that I've seen used is this:
> 
> os.path.abspath(os.path.join(os.path.dirname(sys.argv[0]),'.'))

This is not working. Please look at this code:


import os
import sys

x = os.getcwd()

os.chdir("\whatever")

y = #here I don't know. This code is not working: os.path.abspath(os.path.join(os.path.dirname(sys.argv[0]),'.'))

if x == y: print 'This is what I need'





> 
> I've used it myself and it works for my needs.
> 
> Mike
> 


From bj_666 at gmx.net  Tue Sep 25 07:34:46 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 25 Sep 2007 11:34:46 GMT
Subject: Inserting an element into existing xml file
References: <1190712485.761290.136570@50g2000hsm.googlegroups.com>
	<46F8E0E2.3050602@web.de>
	<1190716205.955284.220810@n39g2000hsh.googlegroups.com>
Message-ID: <5lsa2mF8691tU2@mid.uni-berlin.de>

On Tue, 25 Sep 2007 03:30:05 -0700, Anand wrote:

> I'm Afraid to say, I can't use lxml or elementTree as it requires many
> legal approvals and there is high chances of not getting it through.

In what environment is it hard to get something BSD licensed through!?

Ciao,
	Marc 'BlackJack' Rintsch


From roy at panix.com  Tue Sep  4 08:28:20 2007
From: roy at panix.com (Roy Smith)
Date: Tue, 04 Sep 2007 08:28:20 -0400
Subject: So what exactly is a complex number?
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
	<mailman.4.1188866709.21370.python-list@python.org>
	<roy-3C221C.22043603092007@news.panix.com>
	<mailman.8.1188882659.2658.python-list@python.org>
Message-ID: <roy-0DD920.08282004092007@news.panix.com>

In article <mailman.8.1188882659.2658.python-list at python.org>,
 Steve Holden <steve at holdenweb.com> wrote:

> Roy Smith wrote:
> > Boris Borcic <bborcic at gmail.com> wrote:
> >> Complex numbers are like a subclass of real numbers 
> > 
> > I wouldn't use the term "subclass".  It certainly doesn't apply in the same 
> > sense it applies in OOPLs.  For example, you can't say, "All complex 
> > numbers are real numbers".  In fact, just the opposite.
> > 
> > But, it's equally wrong to say, "real numbers are a subclass of complex 
> > numbers", at least not if you believe in LSP 
> > (http://en.wikipedia.org/wiki/Liskov_substitution_principle).  For example, 
> > it is true that you can take the square root of all complex numbers.  It is 
> > not, however, true that you can take square root of all real numbers.
> > 
> That's not true. I suspect what you are attempting to say is that the 
> complex numbers are closed with respect to the square root operation, 
> but the reals aren't.

Yes, that's what I was trying to say.

> I don't think "subclass" has a generally defined meaning in mathematics 

That may be true, but this is a programming newsgroup, so I was using a 
programming sort of definition.


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Sep 17 14:14:46 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 17 Sep 2007 20:14:46 +0200
Subject: =?ISO-8859-1?Q?I=B4m?= trying to desenvolve a site in python
References: <1190051850.198096.258890@o80g2000hse.googlegroups.com>
Message-ID: <5l7uglF6kto9U1@mid.individual.net>

Andre P.S Duarte wrote:
> I?m trying to desenvolve a site in python. 

What does "desenvolve" mean? By "site", do you mean a web site?

Regards,


Bj?rn

-- 
BOFH excuse #247:

Due to Federal Budget problems we have been forced to cut back on
the number of users able to access the system at one time. (namely
none allowed....)



From eduardo.padoan at gmail.com  Thu Sep 27 23:25:35 2007
From: eduardo.padoan at gmail.com (Eduardo O. Padoan)
Date: Fri, 28 Sep 2007 00:25:35 -0300
Subject: Python 3.0 migration plans?
In-Reply-To: <1190942968.920485.311870@g4g2000hsf.googlegroups.com>
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>
Message-ID: <dea92f560709272025g50d75ab8lfb8062946c3be0c7@mail.gmail.com>

On 9/27/07, TheFlyingDutchman <zzbbaadd at aol.com> wrote:
> It seems that Python 3 is more significant for what it removes than
> what it adds.
>
> What are the additions that people find the most compelling?

 - dict.items(), .values() and .keys() returns "dict views", and the
.iter*() removal
   http://www.python.org/dev/peps/pep-3106/
 - the new super()
   http://www.python.org/dev/peps/pep-3135/

etc...

-- 
http://www.advogato.org/person/eopadoan/
Bookmarks: http://del.icio.us/edcrypt


From dariusjack2006 at yahoo.ie  Sat Sep 22 13:53:24 2007
From: dariusjack2006 at yahoo.ie (http://members.lycos.co.uk/dariusjack/)
Date: Sat, 22 Sep 2007 10:53:24 -0700
Subject: Who can develop the following Python script into working
	application ?
In-Reply-To: <m37imig4kj.fsf@netmaster.kds.com.ua>
References: <1190334828.210230.293980@50g2000hsm.googlegroups.com>
	<1190372423.768184.60080@19g2000hsx.googlegroups.com>
	<5lho31F84jgjU1@mid.uni-berlin.de>
	<1190419744.390216.19040@w3g2000hsg.googlegroups.com>
	<5lk9e0F8leeeU1@mid.uni-berlin.de>
	<m37imig4kj.fsf@netmaster.kds.com.ua>
Message-ID: <1190483604.065498.325530@r29g2000hsg.googlegroups.com>

On Sep 22, 4:25 pm, Andrey Khavryuchenko <akh... at kds.com.ua> wrote:
>  DBR> And as you said yourself:
>
>  DBR> """
>  DBR> Frankly speaking I would prefer to pay for your kind assistance
>  DBR> as it may take me to much time to learn some Python and understand the
>  DBR> following script.
>  DBR> """
>
>  DBR> Now, again:http://www.guru.com/There you can get devlopers for
>  DBR> money. So what again is your problem?
>
> Actually, I am a python (and django) developer, looking for a contract,
> owning Nokia 770 and contacted original poster with no response.
>
> --
> Andrey V Khavryuchenko      http://a.khavr.com/
> Chytach - unflood your feedshttp://www.chytach.com/
> Software Development Companyhttp://www.kds.com.ua/

Thanks Andrey,

if you mean having emailed me before.
I really sorry having to tell that I haven't got any email from you.
Don't use
Reply to author
feature by Google Groups
as any such email is not sent from your mailbox and you don't have a
copy of it.
Just read my e-mail and email me directly from your mailbox not Google
Groups.
At some groups Google diabled this option to contact original poster
personally
and even poster's email adresss is not avaliable.

Thanks for your interest.
Darius




From bdesth.quelquechose at free.quelquepart.fr  Thu Sep 27 14:43:59 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 27 Sep 2007 20:43:59 +0200
Subject: True of False
In-Reply-To: <1190910814.594559.30880@n39g2000hsh.googlegroups.com>
References: <1190910814.594559.30880@n39g2000hsh.googlegroups.com>
Message-ID: <46fbfa1b$0$8896$426a74cc@news.free.fr>

koutoo at hotmail.com a ?crit :
> I tried writing a true and false If statement and didn't get
> anything?  I read some previous posts, but I must be missing
> something.  I just tried something easy:
> 
> a = ["a", "b", "c", "d", "e", "f"]
> 
> if "c" in a == True:
>      Print "Yes"
> 
> When I run this, it runs, but nothing prints.  What am I doing wrong?

See other answers for the details. Anyway, since '"c" in a' is already a 
boolean expression, testing the result of the evaluation of this 
expression against a boolean is a pure waste of time. The usual idiom - 
and this is definitively not Python-specific - is:

if "c" in a:
   print "Yes"

Also, in Python (and in some other languages too), there's a notion of 
"something" vs "nothing" - where, in a boolean context, "something" 
evals to true and "nothing" to false. wrt/ Python, the empty string, an 
empty container (list, tuple, dict, set etc), numerical zero's (int or 
float), and of course the None object all eval to false, and most other 
objects eval to true.


From rshepard at nospam.appl-ecosys.com  Thu Sep 27 20:13:16 2007
From: rshepard at nospam.appl-ecosys.com (rshepard at nospam.appl-ecosys.com)
Date: 28 Sep 2007 00:13:16 GMT
Subject: Importing Module To Use Variables In A Second Module
References: <slrnffo891.17r.rshepard@salmo.appl-ecosys.com>
	<mailman.1192.1190931465.2658.python-list@python.org>
Message-ID: <slrnffohqr.17r.rshepard@salmo.appl-ecosys.com>

On 2007-09-27, Steve Holden <steve at holdenweb.com> wrote:

> Self-evidently you are *not* creating the variables you think you are in
> the variablePage module. Have you tried an interactive test? Try this at
> the interpreter prompt:
>
> >>> import variablePage
> >>> dir(variablePage)
>
> and you will see exactly what names the module is defining in its 
> namespace. You could also try
>
> >>> variablePage.__file__
>
> to make sure that you are importing the module you think you are.

Steve,

  Many thanks.

  I _think_ the problem is that the wxPython objects are not instatiated
when I'm trying to access the variables. Since they are instance variables,
they just don't exist yet.

  Learning just when wxPython objects are instantiated is something I've
just begun to do.

Rich


From george.sakkis at gmail.com  Sat Sep 22 20:45:22 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: Sun, 23 Sep 2007 00:45:22 -0000
Subject: Getting rid of bitwise operators in Python 3?
In-Reply-To: <46f57841$1$15333$4c368faf@roadrunner.com>
References: <46f49740$0$32514$4c368faf@roadrunner.com>
	<1190472612.942736.325850@w3g2000hsg.googlegroups.com>
	<46f57841$1$15333$4c368faf@roadrunner.com>
Message-ID: <1190508322.254185.118740@r29g2000hsg.googlegroups.com>

On Sep 22, 3:29 pm, Carl Banks <pavlovevide... at gmail.com> wrote:
> On Sat, 22 Sep 2007 14:50:12 +0000, Paddy wrote:
> > Sorry Carl,
> > I think *you* may not have much need for bitwise operators but others,
> > including myself do. No matter what the usage found, I would think
> > replacing bitwise operators by function calls a retrograde step.
>
> Well, if people are going to take the suggestion this personally, maybe
> that's reason enough not to bother.
>
> Carl Banks

If you want to push it further, one argument could be along the lines
of "ok, apparently bit fiddling is important for some classes of
problems but so are regular expressions. Are bit operations so
frequent and/or important to grant them around a dozen of operators
while there are none for regexps ?"

George



From sajmikins at gmail.com  Wed Sep 12 13:22:17 2007
From: sajmikins at gmail.com (Simon Forman)
Date: Wed, 12 Sep 2007 17:22:17 -0000
Subject: Tkinter pack difficulty
Message-ID: <1189617737.700363.187450@g4g2000hsf.googlegroups.com>

Hi all,

I realize this is more of a Tk question than a python one, but since
I'm using python and don't know Tcl/Tk I figured I'd ask here first
before bugging the Tcl folks.

I am having a terrible time trying to get a pack() layout working.

I have three frames stacked top to bottom and stretching across the
master window from edge to edge.

Crude ASCII Art rendition of the frames:

============
|  header  |
------------
|   body   |
------------
|   log    |
============


I want the header and log frames to have a fixed height (and stick to
the top and bottom, respectively, of the master frame) and the body
frame to expand to fill the rest of the space, for instance if the
window is maximized.

Here is a simple script that /almost/ does what I want.   I've been
tweaking the pack() options for three hours and I just can't seem to
get the effect I want.  This /can't/ really be this hard can it?

If you run the script, be aware that since there are only frame
widgets the window will initially be very very tiny.  If you expand or
maximize the window you'll see a thin black frame at the top, yay, a
thin white frame at the bottom, yay, but the middle grey "body" frame
will NOT span the Y axis, boo.

It's there, and stretches from side to side, but it refuses to stretch
top to bottom.  Adding a widget (say, a Text) doesn't help, the light
grey non-frame rectangles remain.

My investigations seem to indicate that the light grey bars are part
of something the Tk docs call a "parcel" that each slave widget gets
packed into.  Apparently the "header" and "log" frames don't use their
entire parcels, but I don't know how to get the parcels themselves to
"shrinkwrap" to the size of the actual Frame widgets.

In any event,  my head's sore and I'm just about ready to take out
some graph paper and use the grid() layout manager instead.  But I
really want the automatic resizing that the pack() manager will do,
rather than the static layout grid() will give me.

Any thoughts or advice?

Thanks in advance,
~Simon

# Tkinter script
from Tkinter import *

t = Tk()

header = Frame(t, bg="black", height=10)
header.pack(expand=1, fill=X, side=TOP, anchor=N)

body = Frame(t, bg="grey")
body.pack(expand=1, fill=BOTH, anchor=CENTER)

log = Frame(t, bg="white", height=10)
log.pack(expand=1, fill=X, side=BOTTOM, anchor=S)

t.mainloop()



From __peter__ at web.de  Thu Sep 13 02:19:09 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 13 Sep 2007 08:19:09 +0200
Subject: Search path for python script
References: <1189633230.265179.58780@19g2000hsx.googlegroups.com>
Message-ID: <fcakot$ft9$02$2@news.t-online.com>

Am Wed, 12 Sep 2007 14:40:30 -0700 schrieb grt:

> I'm new to python, running it under cygwin. This must be easy but I
> haven't figured it out. I'm trying to run a script by typing:
> 
> python test.py
> 
> where test.py is in a directory I've added to PYTHONPATH, but test.py
> is not found. Perhaps PYTHONPATH only applies to modules imported
> within a script. I didn't notice an option to python to search the
> standard path, like Perl -S.
> 
> How is this done?

python -m test

Peter


From zzbbaadd at aol.com  Fri Sep 28 14:40:03 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Fri, 28 Sep 2007 11:40:03 -0700
Subject: Python 3.0 migration plans?
In-Reply-To: <mailman.1242.1191003389.2658.python-list@python.org>
References: <1191002679.569709.16870@22g2000hsm.googlegroups.com>
	<mailman.1242.1191003389.2658.python-list@python.org>
Message-ID: <1191004803.604547.213280@o80g2000hse.googlegroups.com>

On Sep 28, 11:16 am, Jean-Paul Calderone <exar... at divmod.com> wrote:
> On Fri, 28 Sep 2007 11:04:39 -0700, TheFlyingDutchman <zzbba... at aol.com> wrote:
> > [snip]
>
> >In this case I asked it as part of the original question and it was
> >ignored. I have programmed in C and C++ and a little Pascal many years
> >ago. I don't remember anything about Higher Order Functions and would
> >like to see exactly how you do it and to verify the contention.
>
> Perhaps you could do a bit of independent research.  Then your messages
> to the group could contain more thoughtful questions and responses.
>
But you miss the fact that I am providing value to the group by
providing unthoughtful questions and unthoughtful responses. By having
most of the pocket protectors being thrown at me, I provide a
diversion that allows others to speak more freely and without fear of
reproach.




From robin at reportlab.com  Fri Sep 21 07:08:57 2007
From: robin at reportlab.com (Robin Becker)
Date: Fri, 21 Sep 2007 12:08:57 +0100
Subject: Odd files; just left behind?
In-Reply-To: <46f3a032$0$26141$426a74cc@news.free.fr>
References: <mailman.760.1190205969.2658.python-list@python.org>	<878x725ts7.fsf@pobox.com>	<46F191DF.7000908@jessikat.plus.net>	<46f2bd9b$0$20143$426a74cc@news.free.fr>	<mailman.860.1190367290.2658.python-list@python.org>
	<46f3a032$0$26141$426a74cc@news.free.fr>
Message-ID: <46F3A649.6060703@chamonix.reportlab.co.uk>

Bruno Desthuilliers wrote:
........
>>  >>>
>>
>> it would seem simpler to have the .so files inside the site-packages and 
>> there's the question of why this folder has to be obfuscated (name 
>> starts with .). Even if these files are "resources" why should they be 
>> assumed to belong to the user?
> 
> Notice that you did install your lib/python in /myhome, not in /usr[/local]

yes, so should I then assume that the root installs will put all the .so files 
in /usr/local/lib/.python-eggs?

In fact when I look at my root installed pythons they seem quite happy to put 
the _mysql.so underneath site-packages. I suspect that if I just installed from 
source I'd get that behaviour, but the egg stuff is different.

> 
> (snip)
>> Just another nonsense from the eggworld
> 
> Or just another example of not reading the FineManual(tm) ?

well I didn't write the installer or the associated egg setup. The egg things 
are supposed to do the right thing, but perhaps they're too difficult for the 
egg layers.
-- 
Robin Becker



From Martin.Drautzburg at web.de  Tue Sep 11 15:08:07 2007
From: Martin.Drautzburg at web.de (Martin Drautzburg)
Date: Tue, 11 Sep 2007 21:08:07 +0200
Subject: Lost in __setstate__() in C++ and swig
Message-ID: <1884096.5YeUtxM9vj@beaureve.gmx.net>

I am trying to cPickle/unpickle a C++ extension class with some private
data members. I wrote __getstate__() and __setstate__ in C++ (I have
to, due to the private data). Pickling writes the following file:

        ccopy_reg
        _reconstructor
        p1
        (cpyramid
        MidiBytes
        p2
        c__builtin__
        object
        p3
        NtRp4
        (S'some unknown MidiBytes'
        I1
        I2
        I3
        tb.

But when unpickling I get the following error

        TypeError: in method 'MidiBytes___setstate__', argument 1 of type 
        'pyramid::MidiBytes *'

I debugged the swig wrapper and indeed the wrapper is called with just
one tuple argument. No object seems to be present at the time.

All the examples I've seen use python functions for __getstate__ and
__setstate__ and it seems to me that the object itself is already there
when __setstate__ is called. 

In a moment of dispair I declared __setstate__() static and have it
create and return a MidiBytes object. 

        MidiBytes *MidiBytes:: __setstate__ (PyObject * aTuple) {
                return new MidiBytes();
        }

Then unpickling no longer complains about "argument 1", but the
unpickled object does not work

        >>> nn = cPickle.load(FILE)
        >>> nn.len()
        Traceback (most recent call last):
          File "<stdin>", line 1, in ?
          File "/usr/src/sound.d/pyramid/pyramid.py", line 618, in len
            return _pyramid.MidiBytes_len(*args)
        TypeError: in method 'MidiBytes_len', argument 1 of
        type 'pyramid::MidiBytes *'

whereas the original object behaves well

        >>> n = pyramid.MidiBytes()
        >>> n.len()
        0

Am I missing something obvious ?











From Herman.Schultz at gmail.com  Sun Sep  2 15:26:27 2007
From: Herman.Schultz at gmail.com (herman)
Date: Sun, 02 Sep 2007 19:26:27 -0000
Subject: how can I find out the process ids with a process name
Message-ID: <1188761187.522146.192380@y42g2000hsy.googlegroups.com>

Hi,

I would like to find out all the process id with the process name
'emacs'.

In the shell, i can do this:

$ ps -ef |grep emacs
root     20731  8690  0 12:37 pts/2    00:00:09 emacs-snapshot-gtk
root  25649 25357  0 13:55 pts/9    00:00:05 emacs-snapshot-gtk rtp.c
root  26319 23926  0 14:06 pts/7    00:00:04 emacs-snapshot-gtk
stressTestVideo.py
root  26985     1  0 14:15 ?        00:00:01 /usr/bin/emacs-snapshot-
gtk
root     27472 21066  0 14:23 pts/5    00:00:00 grep emacs


and I can see the process id is 20731, 25649, etc, etc.

But now I would like to do the programmically in my python script.
I know I can use ' os.system(cmd)' to execute the command 'ps -ef |
grep emacs', but how
can I pipe the output of my 'ps -ef | grep emacs' to my python script
and then run a regression expression with it to get the process Ids?

Thank you.



From spam at spam.com  Tue Sep  4 16:50:36 2007
From: spam at spam.com (daz.diamond)
Date: Tue, 04 Sep 2007 20:50:36 GMT
Subject: pyPortMidi
In-Reply-To: <1188885640.409493.147160@w3g2000hsg.googlegroups.com>
References: <1188885640.409493.147160@w3g2000hsg.googlegroups.com>
Message-ID: <wyjDi.28221$Db6.9463@newsfe3-win.ntli.net>

Cappy2112 wrote:
> Does anyone here use pyPortMidi- in particular for Sending/receiving
> sysex?
> 

I'm starting to, but then I lurk more than I know ...

daz


From wolf_tracks at invalid.com  Tue Sep 18 10:29:41 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Tue, 18 Sep 2007 14:29:41 GMT
Subject: Tutorial or Example (or Tutorial) of Using Canvas to Produce a Plot
Message-ID: <phRHi.50851$Um6.35199@newssvr12.news.prodigy.net>

I'm looking for an example with canvas that produces, say, a complete x-y 
plot of some data. By that I mean, it should do something like the following:

1. Produce x-y axes. The x-axis should be blue and the y-axis
    should be green
2. Put a label on each axis (vertical and horizontal text)
3. Plot some data (3 points is enough) and connect the points
    with a dashed line. Color one line red and the other green.
4. Position a title at some arbitrary place inside the x-y axes.
    That is, not just a title above and outside the top of the
    x-y area.

I just want to see how it's done. I'm not interested in a full-blown canned 
class or widget that does an x-y plot given some data. If not exactly the 
above, then something like it that gives me some idea of how to do such a 
graph. Maybe there's a tutorial that does something like this as an example.

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From DustanGroups at gmail.com  Sun Sep 16 08:17:17 2007
From: DustanGroups at gmail.com (Dustan)
Date: Sun, 16 Sep 2007 12:17:17 -0000
Subject: Python statements not forcing whitespace is messy?
In-Reply-To: <fchku3$n6e$1@daisy.noc.ucla.edu>
References: <1189884110.006272.240840@50g2000hsm.googlegroups.com>
	<mailman.589.1189887114.2658.python-list@python.org>
	<1189890755.870694.29790@r29g2000hsg.googlegroups.com>
	<mailman.594.1189893054.2658.python-list@python.org>
	<fchku3$n6e$1@daisy.noc.ucla.edu>
Message-ID: <1189945037.621620.267040@22g2000hsm.googlegroups.com>

On Sep 15, 5:11 pm, James Stroud <jstr... at mbi.ucla.edu> wrote:
> Steve Holden wrote:
> > I don't know why you have a bug up your ass about it, as the
> > Americans say.
>
> I think most Americans say "wild hare up your ass". We do not, in fact,
> say "wild hair up your ass". Many of us can testify that a hair up one's
> ass would be nothing terribly unusual and would go completely unnoticed
> under most circumstances.
>
> Also, some Americans erroneously say "hair's breath", and others think
> they mean "hare's breath" (which might be tiny, but diffuses quickly to
> theoretically infinite volume). In reality, however, they mean "hair's
> breadth"--which is quite small indeed! For instance, a hair's breadth is
> far smaller than a hare's breath (even at the exact moment of respiration).
>
> James

Funny... I have never heard any of those expressions. I guess I need
to get out more.



From jstroud at mbi.ucla.edu  Thu Sep 13 16:20:29 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 13 Sep 2007 13:20:29 -0700
Subject: An ordered dictionary for the Python library?
In-Reply-To: <1189664832.876539.86800@k79g2000hse.googlegroups.com>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<7xzlzrtrjn.fsf@ruckus.brouhaha.com>
	<1189664832.876539.86800@k79g2000hse.googlegroups.com>
Message-ID: <fcc5lt$ish$1@daisy.noc.ucla.edu>

Mark Summerfield wrote:
> - If an item is inserted it is put in the right place (because the
> underlying data structure, b*tree, skiplist or whatever is
> intrinsically ordered by < on the key)

+1 for all your suggestions below, but -1 for the above. You suggest that

   myOrderedDict['key'] = value

would place it in the dictionary in sorted order depending on 'key'. 
More natural to some of us (or maybe its just me) would be to append the 
key/value pair to the end of items.

My Argument: The problem with inserting at sorted position is the 
assumption that the dict is already sorted, but maybe I want the key 
ordering to reflect something arbitrary, like a database, etc (e.g. 
'Last', 'First', 'MI'). So now I assign to an OrderedDict that already 
has these latter 3 keys:

   myOrderedDict['Favorite Color'] = 'chartruse'

Where does it go? Answer: it probably depends on how the underlying 
sorter works and (even worse) the internal state of the sorter's data 
structure. So, my intuition is that SortedDict behavior should be kept 
distinct from OrderedDict behavior.

> - Extra methods
>     key_at(index : int) -> key
>     item_at(index : int) -> (key, value)
>     value_at(index : int) -> value
>     set_value_at(index : int, value) # no return value necessary but
> maybe key if convenient
>     od[x:y:z] -> list of values ordered by key # can read a slice but
> not assign a slice

I do not see why assigning a slice is a bad idea here. The behavior 
could be such:

  od = OrderedDict((('Last':'Smith'), ('First':'John'), ('MI':'J'))

  od[:1] = ['Brown']
  od[:2] = ['Glotz', 'Joe']

  od[:2] = ['Williams', 'Mary', 'Francis']  # <== ValueError

The latter would be a phenomenon similar to unpacking a tuple of the 
wrong length.

>   and maybe
>     keys_for(fromindex : int, uptobutexcludingindex : int) -> ordered
> list of keys

Of course the naming is redundant for these in my opinion. E.g.:

   key_at -> key
   item_at -> item
   value_at -> value
   set_value_at -> set_value  (not simply set)
   keys_for -> keys           (takes optional argument(s))

James


From meesters at uni-mainz.de  Mon Sep 24 10:10:43 2007
From: meesters at uni-mainz.de (Christian Meesters)
Date: Mon, 24 Sep 2007 16:10:43 +0200
Subject: strange behavious of the logging module?
References: <fd6n9i$8hc$1@news1.zdv.uni-mainz.de>
	<mailman.957.1190586243.2658.python-list@python.org>
Message-ID: <fd8gh3$ba7$1@news1.zdv.uni-mainz.de>

Thanks Peter and Gabriel,

I see, so I should provide the application with an additional handler for
the file in order to gain maximum independence of the two handlers (console
& file stream).

>> Also, adding %(funcName)-8s to the formatter in basigConfig does not work
>> for me: instead of the functions name the level in lower case gets
>> inserted
>> into the logfile.
> 
> Looks like a bug...
> 

Well, the documentation -- as far as I understand it ;-) -- says the
behaviour should be different, you two basically agree ... think I should
file a report.

Thanks,
Christian


From paddy3118 at googlemail.com  Thu Sep 20 11:38:30 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Thu, 20 Sep 2007 15:38:30 -0000
Subject: how to convert xml file to word document.
In-Reply-To: <1190293176.702616.235480@e9g2000prf.googlegroups.com>
References: <1190293176.702616.235480@e9g2000prf.googlegroups.com>
Message-ID: <1190302710.518023.89960@r29g2000hsg.googlegroups.com>

On Sep 20, 1:59 pm, prajwala <m.prajw... at gmail.com> wrote:
>    I want to convert xml file to a word document using python. Is
> there
> any built in module available?
>    or Is there any other way to convert xml file to word document.
>   Please suggest me. This is very urgent now.
>
> Thanks,
> prajwala

XML to XHTML via XSLT ?

- loads of X's but I'd slip Python and elementtree in there somewhere.

- Paddy.



From uymqlp502 at sneakemail.com  Sun Sep  2 01:44:41 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Sat, 01 Sep 2007 22:44:41 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1i3ryxd.g2pzgq159lt5sN%aleax@mac.com>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<7xlkbsmqe4.fsf@ruckus.brouhaha.com>
	<1188525647.003223.199620@q5g2000prf.googlegroups.com>
	<mailman.181.1188527203.28954.python-list@python.org>
	<1188537516.622167.115080@z24g2000prh.googlegroups.com>
	<mailman.217.1188577500.28954.python-list@python.org>
	<1188585630.539835.242460@i38g2000prf.googlegroups.com>
	<mailman.234.1188588307.28954.python-list@python.org>
	<1188592039.612652.223700@r23g2000prd.googlegroups.com>
	<1i3ryxd.g2pzgq159lt5sN%aleax@mac.com>
Message-ID: <1188711881.370954.175830@o80g2000hse.googlegroups.com>

On Sep 1, 6:51 pm, al... at mac.com (Alex Martelli)

> try:
>   blah blah with as many return statements as you want
> finally:
>   something that gets executed unconditionally at the end

Thanks. I didn't think of that.

So design by contract *is* relatively easy to use in Python already.
The main issue, I suppose, is one of aesthetics. Do I want to use a
lot of explicit function calls for pre and post-conditions and "try/
finally" blocks in my code to get DbC (not to mention a global
variable to enable or disable it)?

I suppose if I want it badly enough, I will. But I also happen to be a
bit obsessive about the appearance of my code, and this does
complicate it a bit. The nice thing about having it in the doc string
(as per PEP 316) is that, while it is inside the function, it is also
separate from the actual code in the function. I like that. As far as
I am concerned, the self-test code shouldn't be tangled up with the
primary code.

By the way, I would like to make a few comments about the
"reliability" of Python code. Apparently I offended you the other day
by claiming or implying that Python code is inherently unreliable. I
think it is probably possible to write very reliable code in Python,
particularly for small to medium sized applications, but you probably
need top notch software engineers to do it. And analyzing code or
*proving* that a program is correct is technically harder without
static typing. In highly regulated safety critical domains, you need
more than just reliable code; you need to *demonstrate* or *prove* the
reliability somehow.

I personally use Python for its clean syntax and its productivity with
my time, so I am certainly not denigrating it. For the R&D work I do,
I think it is very appropriate. But I did raise a few eyebrows when I
first started using it. I used C++ several years ago, and I thought
about switching to Ada a few years ago, but Ada just seems to be
fading away (which I think is very unfortunate, but that's another
story altogether).

In any case, when you get right down to it, I probably don't know what
the hell I'm talking about anyway, so I will bring this rambling to a
merciful end.

On, one more thing. I see that the line wrapping on Google Groups is
finally working for me after many months. Fantastic! I can't help but
wonder if my mentioning it to you a few days ago had anything to do
with it.



From rainwatching at gmail.com  Thu Sep  6 14:44:27 2007
From: rainwatching at gmail.com (=?iso-8859-1?q?S=F6nmez_Kartal?=)
Date: Thu, 06 Sep 2007 18:44:27 -0000
Subject: reload(sys)
In-Reply-To: <5-WdnUzNZuwZtX3bnZ2dnUVZ_vOlnZ2d@comcast.com>
References: <1188521143.421431.119100@l22g2000prc.googlegroups.com>
	<JK2dnSgydPkg8ErbnZ2dnUVZ_u3inZ2d@comcast.com>
	<1188564816.430863.219560@w3g2000hsg.googlegroups.com>
	<f8GdnZ-6HbH-1kXbnZ2dnUVZ_s3inZ2d@comcast.com>
	<1188662049.337034.58220@w3g2000hsg.googlegroups.com>
	<b4GdnYMUSPu56UbbnZ2dnUVZ_u2mnZ2d@comcast.com>
	<1189077209.646830.111990@19g2000hsx.googlegroups.com>
	<1189094496.120836.61870@o80g2000hse.googlegroups.com>
	<5-WdnUzNZuwZtX3bnZ2dnUVZ_vOlnZ2d@comcast.com>
Message-ID: <1189104267.431534.183650@o80g2000hse.googlegroups.com>

On 6 Eyl?l, 19:19, Steven Bethard <steven.beth... at gmail.com> wrote:
> S?nmez Kartal wrote:
> > I was using the XMLBuilder(xmlbuilder.py). I'm writing XML files as
> > "f.write(str(xml))". At execution of that line, it gives error with
> > description, configure your default encoding...
>
> [and later]
>
> >http://rafb.net/p/RfaF8215.html
>
> > products in the code is a list of dictionaries which are returned by
> > makeProduct function.
>
> > I'm not typing or pasting those characters into my script. So,
> > declaring an encoding didn't make it. :-( But, your code excerpt
> > runned well.
> Gabriel Genellina wrote:
> > You should ensure that arguments to makeProduct are either:
> > - unicode objects
> > - ASCII strings
>
> > If you got them from some other place, decode the strings as soon as
> > possible into unicode. Read <http://www.amk.ca/python/howto/unicode>
> > to understand what's happening
>
> To further illustrate Gabriel's point, here is some code where I read in
> some UTF8 text from a file.  If you properly decode that text from UTF8,
> you don't get any errors.  If you forget to decode that text, you'll get
> exactly the "default encoding" error you were getting before:
>
>      >>> f = open('temp.txt', 'w')
>      >>> f.write(u'? and ?'.encode('utf8'))
>      >>> f.close()
>      >>> non_decoded_text = open('temp.txt').read()
>      >>> decoded_text = non_decoded_text.decode('utf8')
>      >>> import xmlbuilder
>      >>> builder = xmlbuilder.XMLBuilder()
>      >>> builder.foo = dict(bar=non_decoded_text)
>      >>> str(builder)
>      Decoding Error: You must configure default encoding
>      >>> builder = xmlbuilder.XMLBuilder()
>      >>> builder.foo = dict(bar=decoded_text)
>      >>> str(builder)
>      '<?xml version="1.0" encoding="utf-8"?><foo><bar>\xc2\xae and
>      \xc2\x99</bar></foo>'
>
> Note that I didn't have to do anything with the default encoding. I
> simply had to decode the text file with the appropriate codec. So,
> looking at your code, I'm guessing that you need to figure out where
> you're reading in the "name", "url" and "image" values, and make sure
> you're properly decoding that text.
>
> STeVe
>
> P.S. If you can find somewhere to file a bug report for XMLBuilder, you
> really should.  The error instructing you to configure the default
> encoding is really just wrong.

Thank you Steve for your answers and Gabriel for reminding Unicode
HOWTO to me which I'm going to read tomorrow!

Happy coding



From pyth0nc0d3r at gmail.com  Wed Sep 12 22:49:40 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Wed, 12 Sep 2007 21:49:40 -0500
Subject: Does anyone know if Python 3 will change in structure?
Message-ID: <eb79828c0709121949m2483a9cch3a86d1096794e6c0@mail.gmail.com>

The 2.x stucture is boring, would be cool if there could be some sort of
spacing we could do.
-------------- next part --------------
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From ajmacd at ns.sympatico.ca  Tue Sep 18 19:02:38 2007
From: ajmacd at ns.sympatico.ca (Aaron J. M.)
Date: Tue, 18 Sep 2007 16:02:38 -0700
Subject: Deserializing specific objects from a file
Message-ID: <1190156558.313252.31000@y27g2000pre.googlegroups.com>

I'm building a game and am starting to seriously think about
serialization, though I haven't done much serialization before except
for a few experiments with the pickle module.

There are many objects that I want be able to move in and out of
memory at runtime; namely the game levels.  I only want one level in
memory at a time, so I want to be able to unpickle specific Level
objects as the player moves between levels.  I would prefer my
serialized objects to reside in one file.

I haven't come across references that say how to do something like
what I'm describing.  Does anyone here know what techniques I have to
employ here?

Thank you,

Aaron J. M.

P.S. Is it *deserialize* or *unserialize*?



From __peter__ at web.de  Wed Sep  5 10:11:12 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 5 Sep 2007 16:11:12 +0200
Subject: python exec behaves inconsistent with respect to module imports
References: <1188997944.162811.33640@r34g2000hsd.googlegroups.com>
Message-ID: <fbmde0$io2$03$1@news.t-online.com>

Am Wed, 05 Sep 2007 13:12:24 +0000 schrieb carl.dhalluin at gmail.com:

> I am completely puzzled why the following exec code does not work:
> 
> mycode = "import math\ndef f(y):\n    print math.floor(y)\nf(3.14)"
> def execute():
>     exec mycode
> execute()
> 
> 
> I get the error:
> 
> root at devmachine1:/opt/qbase# python error1.py
> Traceback (most recent call last):
>   File "error1.py", line 5, in ?
>     execute()
>   File "error1.py", line 4, in execute
>     exec mycode
>   File "<string>", line 4, in ?
>   File "<string>", line 3, in f
> NameError: global name 'math' is not defined
 
> Note that the following code _does_ work:
> 
> mycode = "import math\ndef f(y):\n    print math.floor(y)\nf(3.14)"
> exec mycode
 
> I have tested this in python 2.3 and 2.4.

exec breaks nested namespaces here.

Essentially

exec "import math"

puts the "math" name into the local namespace, but

"def f(): math.floor"

looks up "math" in the global namespace. On the module level global and
local namespace are identical

>>> globals() is locals()
True

but inside a function they are distinct

>>> def f(): return globals() is locals()
... 
>>> f()
False

A workaround is to declare "math" as global:

>>> s = """
... global math
... import math
... def f(y): print math.floor(y)
... f(3.14)
... """
>>> def execute():
...     exec s
... 
>>> execute()
3.0

or pass it explicitly:

[new interpreter session]
>>> s = """
... import math
... def f(y, math=math): print math.floor(y)
... f(3.14)
... """
>>> def execute():
...     exec s
... 
>>> execute()
3.0

Peter


From bj_666 at gmx.net  Mon Sep 24 06:05:50 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 24 Sep 2007 10:05:50 GMT
Subject: Would Anonymous Functions Help in Learning Programming/Python?
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<mailman.900.1190414696.2658.python-list@python.org>
	<1190415741.380795.259050@y42g2000hsy.googlegroups.com>
	<mailman.904.1190418441.2658.python-list@python.org>
	<1190419720.811685.145880@r29g2000hsg.googlegroups.com>
	<46f6eb3d$0$32060$426a34cc@news.free.fr>
	<1190606861.982113.25240@d55g2000hsg.googlegroups.com>
	<46f786cc$0$8901$426a74cc@news.free.fr>
Message-ID: <5lpgfuF95s07U3@mid.uni-berlin.de>

On Mon, 24 Sep 2007 11:43:59 +0200, Bruno Desthuilliers wrote:

> You already can create functions without using the def statement:
> 
> Help on class function in module __builtin__:
> 
> class function(object)
>   |  function(code, globals[, name[, argdefs[, closure]]])
>   |
>   |  Create a function object from a code object and a dictionary.
>   |  The optional name string overrides the name from the code object.
>   |  The optional argdefs tuple specifies the default argument values.
>   |  The optional closure tuple supplies the bindings for free variables.
>   |

Where the heck does *this* come from?  Neither Python 2.5.1 nor the
3.0alpha has this in `__builtin__`.

Ciao,
	Marc 'BlackJack' Rintsch


From jjl at pobox.com  Sat Sep 22 03:18:38 2007
From: jjl at pobox.com (John J. Lee)
Date: Sat, 22 Sep 2007 07:18:38 GMT
Subject: Odd files; just left behind?
References: <mailman.760.1190205969.2658.python-list@python.org>
	<878x725ts7.fsf@pobox.com> <46F191DF.7000908@jessikat.plus.net>
	<46f2bd9b$0$20143$426a74cc@news.free.fr>
	<mailman.860.1190367290.2658.python-list@python.org>
	<46f3a032$0$26141$426a74cc@news.free.fr>
	<mailman.861.1190373037.2658.python-list@python.org>
Message-ID: <871wcr5fsh.fsf@pobox.com>

Robin Becker <robin at reportlab.com> writes:

> Bruno Desthuilliers wrote:
> ........
>>>  >>>
>>>
>>> it would seem simpler to have the .so files inside the
>>> site-packages and there's the question of why this folder has to be
>>> obfuscated (name starts with .). Even if these files are
>>> "resources" why should they be assumed to belong to the user?
>>
>> Notice that you did install your lib/python in /myhome, not in /usr[/local]
>
> yes, so should I then assume that the root installs will put all the
> .so files in /usr/local/lib/.python-eggs?

No no -- the extraction of these .so files happens at *runtime*, so it
has to write the files somewhere it has permission to write to.  It's
like RL's zipapp resource extraction feature in fact, except the
resource extraction happens at runtime.  See those web pages I pointed
you at before.


> In fact when I look at my root installed pythons they seem quite happy
> to put the _mysql.so underneath site-packages. I suspect that if I
> just installed from source I'd get that behaviour, but the egg stuff
> is different.

Not sure without all the details, but I suspect those are non-egg
installs.


John


From erfc at caballista.org  Sat Sep  8 11:57:21 2007
From: erfc at caballista.org (Art Deco)
Date: Sat, 08 Sep 2007 09:57:21 -0600
Subject: What does this thread have to do with classical music,
References: <7nnh7350b5h25ghocra72b23mmsnnkj8bh@4ax.com>
	<46957ef1$0$10227$8f2e0ebb@news.shared-secrets.com>
	<46963170$0$97261$892e7fe2@authen.yellow.readfreenews.net>
	<46981df7$0$12095$8f2e0ebb@news.shared-secrets.com>
	<46990784$0$97223$892e7fe2@authen.yellow.readfreenews.net>
	<4699297c$0$4706$4c368faf@roadrunner.com>
	<140720071431044860%erfc@caballista.org>
	<46a3a1a7$0$15115$8f2e0ebb@news.shared-secrets.com>
	<220720072148091069%erfc@caballista.org>
	<46a5385d$0$4832$8f2e0ebb@news.shared-secrets.com>
	<250720071834457296%erfc@caballista.org>
	<46aceaa5$0$13281$8f2e0ebb@news.shared-secrets.com>
	<290720071853200863%erfc@caballista.org>
	<46b12539$0$4807$8f2e0ebb@news.shared-secrets.com>
	<010820072033374341%erfc@caballista.org>
	<46c63474$0$4844$8f2e0ebb@news.shared-secrets.com>
	<180820070841431634%erfc@caballista.org>
	<46c90727$0$14433$8f2e0ebb@news.shared-secrets.com>
	<200820071919337538%erfc@caballista.org>
	<46e1d2a4$0$5075$8f2e0ebb@news.shared-secrets.com>
Message-ID: <080920070957212604%erfc@caballista.org>

ah <splifingate at gmail.com> wrote:
>Art Deco wrote:
>> ah <splifingate at gmail.com> wrote:
>>>Art Deco wrote:
>>>> ah <splifingate at gmail.com> wrote:
>>>>>Art Deco wrote:
>>>>>> ah <splifingate at gmail.com> wrote:
>>>>>>>Art Deco wrote:
>>>>>>>> ah <splifingate at gmail.com> wrote:
>>>>>>>>>Art Deco wrote:
>>>>>>>>>> ah <splifingate at gmail.com> wrote:
>>>>>>>>>>>Art Deco wrote:
>>>>>>>>>>>> ah <splifingate at gmail.com> wrote:
>>>>>>>>>>>>>Art Deco wrote:
>>>>>>>>>>>>>> Who wrote?
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>>>What does that have to do with classical music, snuhwolf?
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>>>What does that have to do with classical music, snuhwolf?
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>> How many more times will you be asking the same tired, lame
>>>>>>>>>>>>>> questions,
>>>>>>>>>>>>>> Tholen?
>>>>>>>>>>>>>
>>>>>>>>>>>>>Till 2056?
>>>>>>>>>>>> 
>>>>>>>>>>>> At that point, he will have made the Thirty Years Pset War look
>>>>>>>>>>>> like
>>>>>>>>>>>> 1967 in the Sinai.
>>>>>>>>>>>
>>>>>>>>>>>It must have been Hell to keep a garden during those times.
>>>>>>>>>>>
>>>>>>>>>>>Did they all eat jerky, or what?
>>>>>>>>>> 
>>>>>>>>>> Worse -- worm-laden hardtack.
>>>>>>>>>
>>>>>>>>>Luxury!
>>>>>>>>>
>>>>>>>>>Why, I remember when I was a lad . . . we used to watch the local
>>>>>>>>>churls
>>>>>>>>>across the fences eating that well.
>>>>>>>>>
>>>>>>>>>We only had millings (and (occasionally) water) on Tuesdays and
>>>>>>>>>Fridays.
>>>>>>>> 
>>>>>>>> Grog and hardtack, life is good!
>>>>>>>
>>>>>>>?Viva la basura!
>>>>>> 
>>>>>> Vivat les ordures!
>>>>>
>>>>>Vivara los trunctiato!
>>>> 
>>>> das Leben ist gut!
>>>
>>>de Handel esta disgustipado!
>> 
>> la vita ? buona!
>
>que grupo da merda!

het leven is goed!

-- 
Official Overseer of Kooks and Saucerheads for alt.astronomy
Wee Davie Tholen is a grade-school lamer
Trainer and leash holder of:
  Honest "Clockbrain" John
  nightbat "fro0tbat" of alt.astronomy
  Tom "TommY Crackpotter" Potter
  <http://www.caballista.org/auk/kookle.php?search=deco>

"Classic erroneous presupposition.  Others developed websites
so that they could have the Last Word, Deco.  In the newsgroups,
I could counter their lies."
  --David Tholen


From ricaraoz at gmail.com  Wed Sep  5 06:03:09 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Wed, 05 Sep 2007 07:03:09 -0300
Subject: REGULAR EXPRESSION
In-Reply-To: <1188968632.077355.199740@y42g2000hsy.googlegroups.com>
References: <1188912767.360967.306050@y42g2000hsy.googlegroups.com>	<fbjnc1$i8b$1@sea.gmane.org>	<mailman.55.1188948935.2658.python-list@python.org>
	<1188968632.077355.199740@y42g2000hsy.googlegroups.com>
Message-ID: <46DE7EDD.7080705@bigfoot.com>

AniNair wrote:
> On Sep 5, 4:35 am, Ricardo Ar?oz <ricar... at gmail.com> wrote:
>> Steve Holden wrote:
>>> AniNair wrote:
>>>> hi.. I am trying to match '+ %&/-' etc using regular expression  in
>>>> expressions like 879+34343. I tried \W+   but it matches only in the
>>>> beginning of the string Plz help Thanking you in advance...
>>> Perhaps you could give a few example of strings that should and
>>> shouldn't match? It isn't clear from your description what pattern you
>>> are trying to find.
>>> regards
>>>   Steve
>> If it's operations between two numbers try :
>> r'([\d.]+?)\s*([-+/*%&])([\d.]+)'
>> It will give you 3 groups, first number, operation and second number
>> (caveat emptor).
> 
> 
> Hi.. Thanks alot for finding time to help a beginner like me. What I
> am trying to do is validate the input i get. I just want to take
> numbers and numbers only. So if the input is 23+1 or 2/3 or 9-0 or
> 7/0 , I want to find it using reg exp. I know there are other ways to
> do this... but i thought i will try this as i need to learn reg exp. I
> tried \D+   ,   \W+,  and \D+|\W+ .. Thanks once again...
> 

Well \d will match a number and '.' inside [] will match a dot ;) so if
you want only integer numbers ([\d.]*) should be replaced with  (\d+)
Only problem with the expression I sent is that it will match a number
with more than one dot.

HTH




From aleax at mac.com  Wed Sep 12 19:23:08 2007
From: aleax at mac.com (Alex Martelli)
Date: Wed, 12 Sep 2007 16:23:08 -0700
Subject: newbie: self.member syntax seems /really/ annoying
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189604018.520338.162520@57g2000hsv.googlegroups.com>
	<46e7f450$0$12305$426a74cc@news.free.fr>
	<1189608231.151112.147550@y42g2000hsy.googlegroups.com>
	<mailman.444.1189611299.2658.python-list@python.org>
	<1i4bnbp.1l8sr3mjdojghN%aleax@mac.com>
	<1189630374.506503.190690@r34g2000hsd.googlegroups.com>
Message-ID: <1i4c3p7.1o7gssi1ws1xa2N%aleax@mac.com>

Carl Banks <pavlovevidence at gmail.com> wrote:
   ...
> How about this?  The decorator could generate a bytecode wrapper that
> would have the following behavior, where __setlocal__ and
> __execute_function__ are special forms that are not possible in
> Python.  (The loops would necessarily be unwrapped in the actual
> bytecode.)

I'm not entirely sure how you think those "special forms" would work.

Right now, say, if the compiler sees somewhere in your function
    z = 23
    print z
it thereby knows that z is a local name, so it adds a slot to the
function's locals-array, suppose it's the 11th slot, and generates
bytecode for "LOAD_FAST 11" and "STORE_FAST 11" to access and bind that
'z'.  (The string 'z' is stored in f.func_code.co_varnames but is not
used for the access or storing, just for debug/reporting purposes; the
access and storing are very fast because they need no lookup).

If instead it sees a "print z" with no assignment to name z anywhere in
the function's body, it generates instead bytecode "LOAD_GLOBAL `z`"
(where the string `z` is actually stored in f.func_code.co_names).  The
string (variable name) gets looked up in dict f.func_globals each and
every time that variable is accessed or bound/rebound.

If the compiler turns this key optimization off (because it sees an exec
statement anywhere in the function, currently), then the bytecode it
generates (for variables it can't be sure are local, but can't be sure
otherwise either as they MIGHT be assigned in that exec...) is different
again -- it's LOAD_NAME (which is like LOAD_GLOBAL in that it does need
to look up the variable name string, but often even slower because it
needs to look it up in the locals and then also in the globals if not
currently found among the locals -- so it may often have to pay for two
lookups, not just one).

So it would appear that to make __setlocal__ work, among other minor
revolutions to Python's code objects (many things that are currently
tuples, built once and for all by the compiler at def time, would have
to become lists so that __setlocal__ can change them on the fly), all
the LOAD_GLOBAL occurrences would have to become LOAD_NAME instead (so,
all references to globals would slow down, just as they're slowed down
today when the compiler sees an exec statement in the function body).
Incidentally, Python 3.0 is moving the OTHER way, giving up the chore of
dropping optimization to support 'exec' -- the latter will become a
function instead of a statement and the compiler will NOT get out of its
way to make it work "right" any more; if LOAD_NAME remains among Python
bytecodes (e.g. it may remain in use for class-statement bodies) it
won't be easy to ask the compiler to emit it instead of LOAD_GLOBAL (the
trick of just adding "exec 'pass'" will not work any more;-).

So, "rewriting" the bytecode on the fly (to use LOAD_NAME instead of
LOAD_GLOBAL, despite the performance hit) seems to be necessary; if
you're willing to take those two performance hits (at decoration time,
and again each time the function is called) I think you could develop
the necessary bytecode hacks even today.

> This wouldn't be that much slower than just assigning local variables
> to locals by hand, and it would allow assignments in the
> straightforward way as well.

The big performance hit comes from the compiler having no clue about
what you're doing (exactly the crucial hint that "assigning local
variables by hand" DOES give the compiler;-)

> There'd be some gotchas, so extra care is required, but it seems like
> for the OP's particular use case of a complex math calculation script,
> it would be a decent solution.

Making such complex calculations even slower doesn't look great to me.

 
> I understand where the OP is coming from.  I've done flight
> simulations in Java where there are lot of complex calculations using
> symbols.  This is a typical formula (drag force calculation) that I
> would NOT want to have to use self.xxx for:
> 
> FX_wind = -0.5 * rho * Vsq * Sref * (C_D_0 + C_D_alphasq*alpha*alpha +
> C_D_esq*e*e)

If ALL the names in every formula always refer to nothing but instance
variables (no references to globals or builtins such as sin, pi, len,
abs, and so on, by barenames) then there might be better tricks, ones
that rely on that knowledge to actually make things *faster*, not
slower.  But they'd admittedly require a lot more work (basically a
separate specialized compiler to generate bytecode for these cases).


Alex


From steve at holdenweb.com  Sat Sep  1 09:03:51 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 01 Sep 2007 09:03:51 -0400
Subject: list index() (OT)
In-Reply-To: <46D95EEC.2000603@bigfoot.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>	<1cnfd31du01el95u70o8mjn9cb5r5aluiu@4ax.com>	<mailman.254.1188629922.28954.python-list@python.org>	<1188631457.050512.103060@y42g2000hsy.googlegroups.com>
	<46D95EEC.2000603@bigfoot.com>
Message-ID: <fbbnvs$nhb$1@sea.gmane.org>

Ricardo Ar?oz wrote:
> Paddy wrote:
>> On Sep 1, 7:57 am, "Hendrik van Rooyen" <m... at microcorp.co.za> wrote:
>>> "Richie Hindle" <richi...ian.com> wrote:
>>>> But - the word for someone who posts to the internet with the intention of
>>>> stirring up trouble derives from the word for what fishermen do, not from
>>>> the word for something that lives under a bridge.  It derives from "trolling
>>>> for suckers" or "trolling for newbies".
>>> So am I right in asserting that there is a difference in pronunciation
>>> of the noun and the verb?
>>>
>>> He is a Troll - like the excellent frolic example
>>> He likes to Troll - rhymes with roll?
>>>
>>> - Hendrik
>> No difference. A troll is a troll is a troll.
>>
>> :-)
>>
>> - Paddy.
> 
> 
> BTW people , the word for what fishermen do is  T R A W L  and not troll
> (Ha! and I'm not a native English speaker).

Just read the whole thread, or use a dictionary: in fishing, trolling 
and trawling are two different things; the first is done with a net, the 
second with a line.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From jstroud at mbi.ucla.edu  Thu Sep 13 20:50:06 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 13 Sep 2007 17:50:06 -0700
Subject: Extended slicing and Ellipsis - where are they used?
In-Reply-To: <1189699345.436400.233460@g4g2000hsf.googlegroups.com>
References: <1189699345.436400.233460@g4g2000hsf.googlegroups.com>
Message-ID: <fcclfe$ur6$1@daisy.noc.ucla.edu>

Rodney Maxwell wrote:
> The following are apparently legal Python syntactically:
>    L[1:3, 8:10]
>    L[1, ..., 5:-2]
> 
> But they don't seem to work on lists:
>>>> l = [0,1,2,3]
>>>> l[0:2,3]
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> TypeError: list indices must be integers
>>>> l[...]
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> TypeError: list indices must be integers
> 
> So where is this extended slicing used?

AFAICT this syntax is not used in the standard library. However, the 
mega-beauty of it is that you can make use of it in your own classes:

py> class Bob(list):
...   def __getitem__(self, i):
...     try:
...       return [list.__getitem__(self, j) for j in i]
...     except TypeError:
...       return list.__getitem__(self, i)
...
py> b = Bob(xrange(15, 30))
py> b[3, 5, 7, 13]
[18, 20, 22, 28]

James


From fredrik at pythonware.com  Wed Sep 26 12:10:20 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 26 Sep 2007 18:10:20 +0200
Subject: Missing documentation for ElementTree?
In-Reply-To: <496954360709260850u3aed1bc3n56f92726c0c542de@mail.gmail.com>
References: <496954360709251539y2511a1cbnd25c6d3a0d368d2a@mail.gmail.com>	<mailman.1080.1190779234.2658.python-list@python.org>	<1190783252.777675.44180@r29g2000hsg.googlegroups.com>
	<496954360709260850u3aed1bc3n56f92726c0c542de@mail.gmail.com>
Message-ID: <fde09c$t4$2@sea.gmane.org>

Robert Dailey wrote:

> This is the documentation for 3.0a1? This is exactly what I was looking 
> for. Thank you.
> 
> @Gabriel
> Your documentation is also useful, it never occurred to me to check the 
> ElementTree website for documentation. Since it came with Python I 
> expected it to be covered by the python documentation. Thanks.

the Element interface section was accidentally omitted due to a weird 
operator error.  looks like someone has finally gotten around to fix 
that in the development versions.

</F>



From steve at REMOVE-THIS-cybersource.com.au  Sat Sep  8 13:23:09 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sat, 08 Sep 2007 17:23:09 -0000
Subject: How to determine the bool between the strings and ints?
References: <mailman.227.1189179649.2658.python-list@python.org>
	<1189182688.290480.102350@o80g2000hse.googlegroups.com>
	<mailman.232.1189183755.2658.python-list@python.org>
	<5kdjmcF31i6hU7@mid.uni-berlin.de>
	<1189193206.466633.148610@r34g2000hsd.googlegroups.com>
	<mailman.271.1189264085.2658.python-list@python.org>
Message-ID: <13e5mjt4cklq891@corp.supernews.com>

On Sat, 08 Sep 2007 12:08:16 -0300, Ricardo Ar?oz wrote:


>>  if type(x) == type(True):
>> ...    print "bool"
>> ...
>> bool
>> 
>> 
> Or just :
> 
>>>> a = True
>>>> type(a) == int
> False

[snip]

You know, one or two examples was probably plenty. The other six or seven 
didn't add anything to your post except length.

Also, type testing by equality is generally not a good idea. For example:

class HexInt(int):
    """Like built-in ints, but print in hex by default."""
    def __str__(self):
        return hex(self)
    __repr__ = __str__

You should be able to use a HexInt anywhere you can use an int. But not 
if your code includes something like this:

if type(value) == int:
    do_something()
else:
    print "Not an int!"

(What do you mean my HexInt is not an int? Of course it is.)

Better is to use isinstance(value, int). Better still is to do duck-
typing, and avoid type() and isinstance() as much as possible.



-- 
Steven.


From steve at holdenweb.com  Fri Sep 28 14:07:05 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 28 Sep 2007 14:07:05 -0400
Subject: OCBC connection
In-Reply-To: <1191000128.112881.111790@r29g2000hsg.googlegroups.com>
References: <mailman.1228.1190992159.2658.python-list@python.org>
	<1191000128.112881.111790@r29g2000hsg.googlegroups.com>
Message-ID: <fdjfs9$il$1@sea.gmane.org>

kyosohma at gmail.com wrote:
> On Sep 28, 9:57 am, "Sugrue, Sean" <Sean.Sug... at analog.com> wrote:
>> I'm trying to make an odbc connection to postgresql which is on a server
>> using python.
>> Does anyone have a code snippet to make a basic connection with a select
>> query?
>>
>> Sean
> 
> Sean,
> 
> This appears to be what you're looking for:
> 
> http://www.devx.com/opensource/Article/29071
> 
> See also Python Database spec and module page:
> 
> http://www.python.org/topics/database/
> 
Mike:

This doesn't address the ODBC part of the inquiry. I was actually going 
to respond saying I wasn't aware of an ODBC driver for PostgreSQL 
(though I'd be surprised if there wasn't one).

Using the psycopg2 module, which is my preferred PostgreSQL interface 
module, it's easy to answer:

 >>> curs = conn.cursor()
 >>> import psycopg2 as db
 >>> conn = db.connect(database="pycon", user="username",
	 password="password", host="localhost", port=5432)
 >>> curs = conn.cursor()
 >>> curs.execute("SELECT orgid, orgname FROM organization")
 >>> from pprint import pprint # just for neatness
 >>> pprint(curs.fetchall())
[(1, 'AB Strakt'),
  (79, 'DevIS'),
     ...
  (113, 'Test Organization'),
  (19, 'Holden Web LLC')]
 >>>

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From duncan.booth at invalid.invalid  Mon Sep 24 09:31:34 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 24 Sep 2007 13:31:34 GMT
Subject: python variable assignement
References: <1190628822.472242.272900@19g2000hsx.googlegroups.com>
	<mailman.975.1190630140.2658.python-list@python.org>
	<1190635944.655293.38290@y42g2000hsy.googlegroups.com>
Message-ID: <Xns99B593194F2D2duncanbooth@127.0.0.1>

mihai <Mihai.Grecu at gmail.com> wrote:

> 
> This is the code:
> 
> begin = select_point()
> if begin == None:
>         return
> 
> end = select_point()
> while end != None:
>         record = Record(begin, end)
>         id = add(record)
>         begin = end
>         end = select_point()
>         # here (sometimes) begin has the same value (or points to the
> same object) like end, the newly selected one
> 
> Is there a way to see if the names points to the same variables or
> that there are different variables with the same values?

You can check whether two names refer to the same object with the 'is' 
operator. So you would use:

   if begin is end: continue

to skip over any duplicate
> 
> The problem is that the problem is more like an bug,
> it happens only in certain conditions, and I have no idea why.
> 
> I have checked the values returned by select_point() and are different
> in all the cases,
> so the problem is with that variables names/values.

Are you sure that nothing you do can change the list of points you are 
iterating over: usually iteration returning unexpected duplicates is 
because you inserted something new into the middle of the list.

A few other unrelated points: the convention is to use 'is' when 
checking for None, and you can reduce the number of calls to 
'select_point' if you use the 'iter' function. Putting those together:

    begin = select_point()
    if begin is None:
        return

    for end in iter(select_point, None):
        if begin is end:
            continue
        record = Record(begin, end)
        id = add(record)
        begin = end


From exhuma at gmail.com  Wed Sep 19 12:24:37 2007
From: exhuma at gmail.com (exhuma.twn)
Date: Wed, 19 Sep 2007 09:24:37 -0700
Subject: psycopg2 or pygresql?
In-Reply-To: <mailman.771.1190216902.2658.python-list@python.org>
References: <1190214385.994370.167750@r29g2000hsg.googlegroups.com>
	<mailman.771.1190216902.2658.python-list@python.org>
Message-ID: <1190219077.252577.259570@19g2000hsx.googlegroups.com>

On Sep 19, 5:47 pm, Steve Holden <st... at holdenweb.com> wrote:
> exhuma.twn wrote:
> > Plain and simple. What would you use?
>
> > So far I have written everything with psycopg2. One thing that annoys
> > me is that I cannot easily access the column names from a query. I
> > know that this is not part of the DBAPI2  so I cannot expect the model
> > to suport it.
>
> Yes it is.
>
> Execute a SELECT * FROM TABLE WHERE 1=0 and then examine
> cursor.description. This allows you to introspect on database structure.
>
> > I quite like the "mogrify" method of psycopg2 very much. It's very
> > useful for debugging.
>
> > And before someone says: "Use the DictCursor-factory to access column
> > names". Yes I can do that. But a dict does not guarantee the same
> > order of keys as the columns were specified in the query.
>
> See below.
>
> > The reason: I wrote a very simple Qt-Widget (inherited from
> > QTableWidget) that takes a SQL query and displays the results. And I
> > would like to have the columns ordered the same way as I specified in
> > the query *with* a header-label. For now I hava a method on the widget
> > which takes a query, *and* a list of labels.
>
> > I can live with that though. Although it itches me.
>
> > Would pygresql solve my dilemma? Or would you rather say: "Don't use
> > pygresql!"  ;)
>
> Here's a psycopg2-based session:
>
>  >>> curs
> <cursor object at 0x00B823C8; closed: 0>
>  >>> curs.execute("SELECT * FROM Person WHERE 1=0")
>  >>> curs.description
> (('psnid', 23, None, 4, None, None, None), ('psnfirstname', 1043, None,
> 50, None, None, None), ('psnlastname', 1043, None, 50, None, None,
> None), ('psndear', 1043, None, 50, None, None, None), ('psntitle', 1043,
> None, 50, None, None, None), ('psnworkphone', 1043, None, 30, None,
> None, None), ('psnworkextension', 1043, None, 20, None, None, None),
> ('psnhomephone', 1043, None, 30, None, None, None), ('psnmobilephone',
> 1043, None, 30, None, None, None), ('psnfaxnumber', 1043, None, 30,
> None, None, None), ('psnemailname', 1043, None, 50, None, None, None),
> ('psnreferredby', 1043, None, 50, None, None, None), ('psnlocid', 23,
> None, 4, None, None, None), ('psnnotes', 1043, None, -1, None, None, None))
>
> I believe if you use specific column names in your query they will
> appear in the order given in the query also.
>
> I use this technique in
>
>    http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/81189
>
> to print arbitrary query outputs.
>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
>
> Sorry, the dog ate my .sigline


Apparently I am deaf dumb and blind.... :( Sorry. I grepped several
times through the PEP for various other reasons, and this little bit
escaped me.

Thanks for being nice guys and answering anyhow. Much appreciated.



From grante at visi.com  Thu Sep  6 22:30:41 2007
From: grante at visi.com (Grant Edwards)
Date: Fri, 07 Sep 2007 02:30:41 -0000
Subject: why should I learn python
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
	<LC_Di.8274$924.7987@newssvr23.news.prodigy.net>
	<1189117798.506367.278560@y42g2000hsy.googlegroups.com>
Message-ID: <13e1duhl3evcg2c@corp.supernews.com>

On 2007-09-06, windandwaves <nfrancken at gmail.com> wrote:
> On Sep 7, 9:50 am, James Stroud <jstr... at mbi.ucla.edu> wrote:
>> Seewww.python.org. Trust us all when we say that its the best.
>>
>
> I get that feeling - yes.  Question is:
>
> 1. what is it good for?

Writing programs.

> 2. why is it so good?

Compared to languages like C/C++ it takes a lot less time to
write a program in Python and results in programs that work.
The programs are also a lot easier to maintain.  And a lot more
portable.

-- 
Grant Edwards                   grante             Yow!  I am deeply CONCERNED
                                  at               and I want something GOOD
                               visi.com            for BREAKFAST!


From zach at REMOVEME.in.tu-clausthal.de  Fri Sep 28 18:25:42 2007
From: zach at REMOVEME.in.tu-clausthal.de (Gabriel Zachmann)
Date: Fri, 28 Sep 2007 22:25:42 +0000 (UTC)
Subject: Bug with lists of pairs of lists and append()
Message-ID: <slrnffqvr6.uut.zach@zaphome.in.tu-clausthal.de>

Well,

could some kind soul please explain to me why the following trivial code is
misbehaving?

#!/usr/bin/python

lst = [ 0, 1, 2 ]

s = []

l = [ lst[0] ]
r = lst[1:]
while r:
    x = (l,r)
    print x
    s.append( x )

    l.append( r.pop(0) )

print s



The output I get is:

([0], [1, 2])
([0, 1], [2])
[([0, 1, 2], []), ([0, 1, 2], [])]

and the error is in the last line: the two pairs in the outer list are
identical and they should be as the pairs on the first and the 2nd line,
respectively!

I think I'm going nuts -- for the life of me I don't see what's going on ...
(I've been tracking down a bug in my larger python script, and the cause
seems to boil down to the above snippet.)

Thanks a lot in advance for any insights, etc.

Best regards,
Gabriel.



From exhuma at gmail.com  Mon Sep 24 10:35:58 2007
From: exhuma at gmail.com (exhuma.twn)
Date: Mon, 24 Sep 2007 07:35:58 -0700
Subject: (pyqt) Parameters when connecting a signal to a method?
Message-ID: <1190644558.386647.88270@22g2000hsm.googlegroups.com>

Some code:

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

def foobar(w):
   print w

QtCore.QObject,connect( my_line_edit,
QtCore.SIGNAL("returnPressed()"), foobar )

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


How can I get this to work so "foobar" prints out the sender of the
signal (i.e. my_line_edit)?



From bronger at physik.rwth-aachen.de  Sat Sep  8 13:42:14 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Sat, 08 Sep 2007 19:42:14 +0200
Subject: /dev/null as a file-like object, or logging to nothing
References: <87k5r1jdzq.fsf@wilson.homeunix.com>
	<5kg48jF33dv5U3@mid.uni-berlin.de>
Message-ID: <87fy1pjbpl.fsf@wilson.homeunix.com>

Hall?chen!

Marc 'BlackJack' Rintsch writes:

> On Sat, 08 Sep 2007 18:52:57 +0200, Torsten Bronger wrote:
>
>> Is there a portable and simply way to direct file-like IO to
>> simply nothing?  I try to implement some sort of NullLogging by
>> saying
>
> `os.devnull`?

Yes, but I wasn't really sure how portable it is, in particular, on
Windows.  So does

open(os.devnull, "w").write("Schallalla")

work on Windows like on Unix?

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From jstroud at mbi.ucla.edu  Sat Sep 15 17:58:15 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sat, 15 Sep 2007 14:58:15 -0700
Subject: Needless copying in iterations?
Message-ID: <fchk59$mm3$1@daisy.noc.ucla.edu>

Hello all,

I was staring at a segment of code that looked like this today:

    for something in stuff[x:y]:
      whatever(something)

and was wondering if the compiler really made a copy of the slice from 
stuff as the code seems to suggest, or does it find some way to produce 
an iterator without the need to make a copy (if stuff is a built-in 
sequence type)? Or would it be more efficient to do the more clumsy (in 
my opinion):

    for i in xrange(x, y):
      whatever(stuff[i])

James


From jeroen.hegeman at gmail.com  Mon Sep 24 11:51:06 2007
From: jeroen.hegeman at gmail.com (Jeroen Hegeman)
Date: Mon, 24 Sep 2007 17:51:06 +0200
Subject: Newbie completely confused
In-Reply-To: <1190434069.108503.281930@y42g2000hsy.googlegroups.com>
References: <mailman.876.1190392492.2658.python-list@python.org>
	<1190434069.108503.281930@y42g2000hsy.googlegroups.com>
Message-ID: <1122CE63-193C-4EF3-A2AC-3D9DE3DD88BE@gmail.com>


>
> Your code does NOT include any statements that could have produced the
> above line of output -- IOW, you have not posted the code that you
> actually ran.

Oh my, I must have cleaned it up a bit too much, hoping that people  
would focus on the issue instead of the formatting of the output  
strings! Did you miss your morning coffee???

> Your code is already needlessly monstrously large.
Which I realised and apologised for beforehand.

>
> And Python 2.5.1 does what? Strike 3.

Hmm, I must have missed where it said that you can only ask for help  
if you're using the latest version... In case you're wondering, 2.5.1  
is not _really_ that wide-spread as most of the older versions.

> For handling the bit extraction stuff, either
[snip]
> (b) do a loop over the bit positions

Now that sounds more useful. I'll give that a try.

Thanks,
Jeroen

Jeroen Hegeman
jeroen DOT hegeman AT gmail DOT com

WARNING: This message may contain classified information. Immediately  
burn this message after reading.





From ldo at geek-central.gen.new_zealand  Mon Sep 24 04:07:24 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 24 Sep 2007 20:07:24 +1200
Subject: Would Anonymous Functions Help in Learning Programming/Python?
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<1190413322.962737.53900@r29g2000hsg.googlegroups.com>
Message-ID: <fd7r7s$n3o$2@lust.ihug.co.nz>

In message <1190413322.962737.53900 at r29g2000hsg.googlegroups.com>, 
chris.monsanto at gmail.com wrote:

> A question: if you WERE to implement function definitions as normal
> expressions, how would you go about embedding it within an expression?
> 
> x = map(def a:
>             <line of code>
>             <line of code>
>             <line of code>
>         , [1, 2, 3])

Perl can do it just fine:

$x = map
  (
    sub
      {
        ...
      },
    [1, 2, 3]
  );

The fact that Python has difficulties is purely a demonstration of the
limitations of indentation-controlled syntax, not a criticism of the
concept itself.


From semanticist at gmail.com  Tue Sep  4 14:05:32 2007
From: semanticist at gmail.com (Miles)
Date: Tue, 4 Sep 2007 14:05:32 -0400
Subject: Printing lists in columns
In-Reply-To: <87wsv6bda3.fsf@mulj.homelinux.net>
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<1188900397.459760.259580@k79g2000hse.googlegroups.com>
	<slrnfdqe3t.i4p.hat@se-162.se.wtb.tue.nl>
	<Xns99A17FAC2587duncanbooth@127.0.0.1>
	<1188906767.737741.267350@19g2000hsx.googlegroups.com>
	<Xns99A18F8C528BCduncanbooth@127.0.0.1>
	<1188913394.763871.218660@d55g2000hsg.googlegroups.com>
	<46dd69b1$0$24998$426a74cc@news.free.fr>
	<1188917550.261894.84010@k79g2000hse.googlegroups.com>
	<87wsv6bda3.fsf@mulj.homelinux.net>
Message-ID: <a49e45f50709041105q5442ef50oae986f1b28c3e8f2@mail.gmail.com>

On 9/4/07, Hrvoje Niksic wrote:
> Python isn't too happy about adding individual keyword arguments after
> an explicit argument tuple.  Try this instead:
>
> for row in izip_longest(*d, **dict(fillvalue='*')):
>      print ', '.join(row)

Or simply:

for row in izip_longest(fillvalue='*', *d):
    print ', '.join(row)

-Miles


From x_john at timney.eclipse.co.uk  Tue Sep 11 09:35:58 2007
From: x_john at timney.eclipse.co.uk (John Timney (MVP))
Date: Tue, 11 Sep 2007 14:35:58 +0100
Subject: Car-ac-systems
References: <1189511932.371621.112970@o80g2000hse.googlegroups.com>
Message-ID: <BeqdnaFrktIgBHvbnZ2dnUVZ8v-dnZ2d@eclipse.net.uk>

How do I control one with C# then!  Thats not on your site, clearly not 
everything I need to know then.  Waste of a site!

Regards

John Timney (MVP)
http://www.johntimney.com
http://www.johntimney.com/blog


"knjaz" <knjaz0 at gmail.com> wrote in message 
news:1189511932.371621.112970 at o80g2000hse.googlegroups.com...
> Here you can find everything you need to know about car air
> conditioning
>
> http://car-ac-systems.blogspot.com/
> 




From martin at v.loewis.de  Sat Sep 29 02:56:08 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 29 Sep 2007 08:56:08 +0200
Subject: Python  and SSL
In-Reply-To: <7x641u0zvl.fsf@ruckus.brouhaha.com>
References: <1190959345.041723.108130@k79g2000hse.googlegroups.com>
	<46fd7e7b$0$18410$9b622d9e@news.freenet.de>
	<7x641u0zvl.fsf@ruckus.brouhaha.com>
Message-ID: <46fdf708$0$2775$9b622d9e@news.freenet.de>

>>> But how can I tell my Python program to trust my SSL certificate?
>> Why do you want to tell it that? The SSL module will trust *any*
>> server certificate, no need to tell it explicitly which ones to
>> trust.
> 
> Er, the whole idea of SSL is that you don't trust the connection.

Please try to understand that OP's question. He got some error,
and for some reason, he concluded that he needs to tell Python
to trust the server certificate (most likely to make the error
go away). I told him that he is likely wrong, and that Python already
trusts his server certificate. I was not proposing any judgment on
whether that's a good thing or not. In fact, I have no idea whether
security was of any concern to the OP.

Regards,
Martin


From deets at nospam.web.de  Wed Sep  5 13:54:24 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 05 Sep 2007 19:54:24 +0200
Subject: PythonAlley.com
In-Reply-To: <1189012363.397845.174960@y42g2000hsy.googlegroups.com>
References: <mailman.92.1189002436.2658.python-list@python.org>
	<1189012363.397845.174960@y42g2000hsy.googlegroups.com>
Message-ID: <5k88qtF2h32tU1@mid.uni-berlin.de>

dkeeney schrieb:
> The Python community would benefit from a moderated web-forum along
> the lines of
> perlmonks.org.
> 
> The Python community online now seems to have two major segments, the
> c.l.p newsgroup (here),
> and a large selection of blogs.  C.l.p is unmoderated and often
> hostile.  The bloggers
> self-moderate reasonably well (to my observation), but the blogs,
> individually and
> in aggregate, look 'read-only' to newbies, in that questions are not
> welcomed.
> 
> A moderated forum that gives recognition to the experienced and
> tolerance to newbies would be a good thing.

You might consider this as hostility - but this forum _is_ very helpful 
to newbies & generally NOT hostile.

Diez


From wink at saville.com  Thu Sep 27 23:52:57 2007
From: wink at saville.com (wink)
Date: Fri, 28 Sep 2007 03:52:57 -0000
Subject: Asynchronous Messaging
In-Reply-To: <mailman.1146.1190874945.2658.python-list@python.org>
References: <1190807252.731074.141450@k79g2000hse.googlegroups.com>
	<1190819912.344267.52680@50g2000hsm.googlegroups.com>
	<mailman.1119.1190822847.2658.python-list@python.org>
	<1190868212.383316.20990@57g2000hsv.googlegroups.com>
	<mailman.1146.1190874945.2658.python-list@python.org>
Message-ID: <1190951577.293881.44040@r29g2000hsg.googlegroups.com>

>
> That't not the reason. A Queue is built around a container, and it happens
> to be a deque in the default implementation. But the important thing is
> that a Queue is a synchronized object - it performs the necesary
> synchronization to ensure proper operation even from multiple threads
> attempting to use it at the same time.
> So your comparison is meaningless, apart from telling that using mutexes
> is not cheap.
>
> --
> Gabriel Genellina

Interesting, from the documentation for deque says;
"Deques support thread-safe, ..." which would seem to
imply a mutex of some sort would be used. But in
looking at collectionsmodule.c for 2.5.1 I don't see
any mutex which would seem to imply there is one
place else, maybe the GIL, or the documentation is
incorrect.

On the other hand looking at the code in Queue.py there
is a more code plus the not_full Condition variable plus
the call to _put (which is a call to the deque.append)
plus a notify on the not_empty conditional, so it's not
surprising it's slower.

If and when I think Queue is a performance impediment
to an mproc I'll take another look at it, for now lots
of things to learn.

Thanks,

Wink



From nagle at animats.com  Sat Sep 29 00:14:37 2007
From: nagle at animats.com (John Nagle)
Date: Sat, 29 Sep 2007 04:14:37 GMT
Subject: Python  and SSL
In-Reply-To: <6cydncA2Jpv082DbnZ2dnUVZ_q6dnZ2d@comcast.com>
References: <1190959345.041723.108130@k79g2000hse.googlegroups.com>
	<6cydncA2Jpv082DbnZ2dnUVZ_q6dnZ2d@comcast.com>
Message-ID: <NikLi.3276$6p6.368@newssvr25.news.prodigy.net>

Heikki Toivonen wrote:
> Johny wrote:
>> I need to use Python with SSL comunication betweeen servers.
>> (I use hhtplib but I think urllib2 can also be used )
>>  I think I need to use SSL root certificate and tell  a program to
>> trust this certificate.
> 
> You can't do secure SSL with the builtin SSL support, you need to use a
> third party module. There are a few available, including M2Crypto, TLS
> Lite, pyOpenSSL and pyOpenSSL-extended. Since I am the maintainer of
> M2Crypto I will naturally recommend that ;)
> 
> http://chandlerproject.org/Projects/MeTooCrypto

     Any progress on getting M2Crypto 0.18 to build successfully
on Fedora Core?

					John Nagle



From gagsl-py2 at yahoo.com.ar  Mon Sep 24 03:43:15 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 24 Sep 2007 04:43:15 -0300
Subject: elementtree question
References: <fd0lmi$pm8$1@foggy.unx.sas.com>
	<mailman.898.1190412966.2658.python-list@python.org>
	<B9idnbGBOPpFFGnbnZ2dnUVZ_hqdnZ2d@comcast.com>
Message-ID: <op.ty5eedt1x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 22 Sep 2007 00:19:59 -0300, Mark T <nospam at nospam.com> escribi?:

> "Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote in message
> news:mailman.898.1190412966.2658.python-list at python.org...
>> En Fri, 21 Sep 2007 11:49:53 -0300, Tim Arnold <tim.arnold at sas.com>
>> escribi?:
>>
>>> Hi, I'm using elementtree and elementtidy to work with some HTML files.
>>> For
>>> some of these files I need to enclose the body content in a new div  
>>> tag,
>>> like this:
>>> <body>
>>>   <div class="remapped">
>>>    original contents...
>>>   </div>
>>> </body>

[wrong code]

> The above wraps the body element, not the contents of the body element.   
> I'm
> no ElementTree expert, but this seems to work:

[better code]

Almost right. clear() removes all attributes too, so if the body element  
had any attribute, it is lost. I would remove children from body at the  
same time they're copied into newdiv.
(This whole thing appears to be harder than one would expect at first)

import xml.etree.cElementTree as ET
source = """<html><head><title>Test</title></head><body lang="en">
   original contents... 2&amp;3 <a href="hello/world">som&#101; text</a>
   <p>Another paragraph</p>
</body></html>"""
tree = ET.XML(source)
body = tree.find("body")
newdiv = ET.Element('div', {'class':'remapped'})
for e in list(body.getchildren()):
   newdiv.append(e)
   body.remove(e)
newdiv.text, body.text = body.text, ''
newdiv.tail, body.tail = body.tail, ''
body.append(newdiv)
ET.dump(tree)

-- 
Gabriel Genellina



From thanosv at gmail.com  Tue Sep 18 08:47:05 2007
From: thanosv at gmail.com (thanosv at gmail.com)
Date: Tue, 18 Sep 2007 05:47:05 -0700
Subject: raw string
In-Reply-To: <mailman.705.1190107036.2658.python-list@python.org>
References: <mailman.705.1190107036.2658.python-list@python.org>
Message-ID: <1190119625.913133.87320@19g2000hsx.googlegroups.com>

On Sep 18, 5:20 am, Konstantinos Pachopoulos <kostaspa... at yahoo.gr>
wrote:
> Hi,
> i am trying to execute the following query on a DB:
> qe.execQuery(r"SELECT * FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY
> '"' LINES TERMINATED BY '\n' FROM Commiter")
>
> However, whether i put the r in the front or not, i always get an error
> about the "\n".
> What's wrong?

Try

r"SELECT * FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '\"' LINES
TERMINATED BY '\n' FROM Commiter"

It works for me.




From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Tue Sep 11 07:52:46 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Tue, 11 Sep 2007 13:52:46 +0200
Subject: cpython list __str__ method for floats
References: <13ectngf3aeqrb0@corp.supernews.com>
Message-ID: <5kndseF4iskqU1@mid.individual.net>

[david] wrote:
> returns poorly formatted values:

Please explain.

>  >>>str(13.3)
> '13.3'
>  >>>str([13.3])
> '[13.300000000000001]'

This is quite a FAQ.

str of a float returns the float, rounded to decimal precision.

str of a list returns a square brackets enclosed enumeration of the
contents (using repr on them). repr of a float returns the float in
full precision.

Regards,


Bj?rn

-- 
BOFH excuse #442:

Trojan horse ran out of hay



From ricaraoz at gmail.com  Sat Sep  8 14:25:41 2007
From: ricaraoz at gmail.com (=?UTF-8?B?UmljYXJkbyBBcsOhb3o=?=)
Date: Sat, 08 Sep 2007 15:25:41 -0300
Subject: How to determine the bool between the strings and ints?
In-Reply-To: <13e5mjt4cklq891@corp.supernews.com>
References: <mailman.227.1189179649.2658.python-list@python.org>	<1189182688.290480.102350@o80g2000hse.googlegroups.com>	<mailman.232.1189183755.2658.python-list@python.org>	<5kdjmcF31i6hU7@mid.uni-berlin.de>	<1189193206.466633.148610@r34g2000hsd.googlegroups.com>	<mailman.271.1189264085.2658.python-list@python.org>
	<13e5mjt4cklq891@corp.supernews.com>
Message-ID: <46E2E925.3020106@bigfoot.com>

Steven D'Aprano wrote:
...
..
.
> You know, one or two examples was probably plenty. The other six or seven 
> didn't add anything to your post except length.
> 
> Also, type testing by equality is generally not a good idea. For example:
> 
> class HexInt(int):
>     """Like built-in ints, but print in hex by default."""
>     def __str__(self):
>         return hex(self)
>     __repr__ = __str__
> 
> You should be able to use a HexInt anywhere you can use an int. But not 
> if your code includes something like this:
> 
> if type(value) == int:
>     do_something()
> else:
>     print "Not an int!"
> 
> (What do you mean my HexInt is not an int? Of course it is.)
> 
> Better is to use isinstance(value, int). Better still is to do duck-
> typing, and avoid type() and isinstance() as much as possible.

>>> type(a) == HexInt
True

That's what I wanted (though I don't know if that's what the OP wanted).
BTW, sorry for the wasted bandwidth, didn't realize you might have such
a small bandwidth that seven lines would be a hassle. We should also
tell the blokes of the 'music' thread to stop it, I can imagine how mad
that must get you.





From dohertywa at gmail.com  Mon Sep 17 16:07:31 2007
From: dohertywa at gmail.com (dohertywa)
Date: Mon, 17 Sep 2007 13:07:31 -0700
Subject: Probstat Combination Objects and Persistence
In-Reply-To: <1189969908.477201.137360@w3g2000hsg.googlegroups.com>
References: <1189954886.324005.325240@22g2000hsm.googlegroups.com>
	<1189969908.477201.137360@w3g2000hsg.googlegroups.com>
Message-ID: <1190059651.447947.121090@k79g2000hse.googlegroups.com>

On Sep 16, 3:11 pm, Sidd <iams... at gmail.com> wrote:
> On Sep 16, 8:01 am, dohertywa <dohert... at gmail.com> wrote:
>
>
>
> > Hi:
>
> > I'm working with probstat module which does an excellent job for the
> > project I'm working on.
>
> > I am passing the Combination objects I generate to generator functions
> > that allow me to scale down the results.
>
> > I am trying to find a way however to store the end resultant
> > Combination object.  Try to pickle it, and Python segfaults.
>
> > I want to be able to store the Combination object at any point so I
> > may operate on it later without having to repeat previous work.
>
> > Any suggestions?
>
> > TVKIA,
> > Adam
>
> You might want to take a look at this tutorial:http://www.ibm.com/
> developerworks/library/l-pypers.html

Thanks for the suggestion.  Unfortunately I've already read the
article and still find myself a bit of a loss as to a solution.



From jon at turnthepage.org  Wed Sep 12 12:55:03 2007
From: jon at turnthepage.org (Jon Rosebaugh)
Date: Wed, 12 Sep 2007 11:55:03 -0500
Subject: Generating HTML
References: <mailman.427.1189571602.2658.python-list@python.org>
Message-ID: <2007091211550316807-jon@turnthepageorg>

On 2007-09-11 23:33:18 -0500, "Sebastian Bassi" 
<sbassi at clubdelarazon.org> said:

> Hello,
> 
> What are people using these days to generate HTML? I still use
> HTMLgen, but I want to know if there are new options. I don't
> want/need a web-framework a la Zope, just want to produce valid HTML
> from Python.
> Best,
> SB.

Other folks have suggested Mako, and that's an excellent option. But 
I'd like to also suggest Brev?: a html DSL.

http://breve.twisty-industries.com/

html [
    head [
        title [ 'A Brev? Template' ]
    ],

    body [
        h1 [ 'Briefly, Brev?' ], br,
        div ( style = 'text-align: center;' ) [
            span [ '''
                As you can see, Brev? maps very
                directly to the final HTML output.
            ''' ]
        ]
    ]
]



From deets at nospam.web.de  Fri Sep 28 15:05:03 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 28 Sep 2007 21:05:03 +0200
Subject: C Source Code Generator For Test Cases
References: <1191001738.456766.176050@n39g2000hsh.googlegroups.com>
Message-ID: <5m51iuFbao07U1@mid.uni-berlin.de>

gamename wrote:

> Hi,
> 
> Can anyone recommend a good method of using python to generate c
> source code?   I have tables of test cases to use as input to a
> process which would generate the test's source code.  The Cheetah tool
> looks interesting.  Has anyone used it? Any other suggestions?

How about using c-types to access your C-stuff to test, and use python + the
testcase-tables to invoke that?

Diez


From stef.mientki at gmail.com  Sun Sep 23 16:24:12 2007
From: stef.mientki at gmail.com (stef mientki)
Date: Sun, 23 Sep 2007 22:24:12 +0200
Subject: building a GUI
In-Reply-To: <5lnp2rF90pqqU1@mid.uni-berlin.de>
References: <1190557293.266783.251480@y42g2000hsy.googlegroups.com>	<mailman.940.1190560838.2658.python-list@python.org>	<pan.2007.09.23.17.41.52@gmail.com>	<mailman.945.1190571251.2658.python-list@python.org>
	<5lnp2rF90pqqU1@mid.uni-berlin.de>
Message-ID: <46F6CB6C.3050609@gmail.com>

Diez B. Roggisch wrote:
> stef mientki schrieb:
>   
>> Thomas Dybdahl Ahle wrote:
>>     
>>> Den Sun, 23 Sep 2007 17:28:38 +0200 skrev stef mientki:
>>>  
>>>       
>>>> yadin wrote:
>>>>
>>>>    
>>>>         
>>>>> if i were up to make a GUI chich are the advantages of choosing python
>>>>> over matlab or java?
>>>>>
>>>>>       
>>>>>           
>>>> The best is Delphi,
>>>> second is VB,
>>>>     
>>>>         
>>> That sounds mostly like a personal preference :)
>>>
>>>   
>>>       
>> Well I prefer Python ( because of it's OS-independancy and it's open 
>> source),
>> but Python is really (still) much worse for GUI designs.
>> Just compare some parameters like:
>> - ease of use
>> - speed of development
>> - support of features
>> - availability of libraries
>> - documentation
>>     
>
> Sounds like PyQt for me. Best GUI-designer I know, tremendous speed in 
> development, giant sized lib that does all kinds of stuff & is 
> brilliantly designed + professional grade docus.
>   
Could well be,
but I never looked at PyQt seriously,
because of their weird license.

cheers,
Stef



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Sep 18 12:24:02 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 18 Sep 2007 18:24:02 +0200
Subject: Using pseudonyms (was Re: Python 3K or Python 2.9?)
In-Reply-To: <fcop08$2ue$1@panix3.panix.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46ee2d9d$0$26213$426a74cc@news.free.fr>
	<fcn81q$g80$1@panix3.panix.com>
	<46ef893c$0$21882$426a34cc@news.free.fr>
	<fcop08$2ue$1@panix3.panix.com>
Message-ID: <46effb9a$0$20144$426a74cc@news.free.fr>

Aahz a ?crit :
> In article <46ef893c$0$21882$426a34cc at news.free.fr>,
> Bruno Desthuilliers  <bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote:
>> Aahz a ?crit :
>>> In article <46ee2d9d$0$26213$426a74cc at news.free.fr>,
>>> Bruno Desthuilliers  <bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote:
>>>> But what, given that I'm an AOL user still thinking it's kewl to hide 
>>>> behind a pseudo, what else would you expect ?
>>> What exactly is a "pseudo", pray tell?
>> Sorry : a pseudonym (a nickname).
> 
> You apparently missed the thrust of my sarcasm. 

Obviously, yes.



From tgrav at mac.com  Wed Sep  5 08:36:40 2007
From: tgrav at mac.com (Tommy Grav)
Date: Wed, 5 Sep 2007 08:36:40 -0400
Subject: handling modules in packages
Message-ID: <619B716A-C1EB-42DF-9702-E288AD04F613@mac.com>

Hi,

   I am working on a package that contains a number of
different modules:

 > ls pyAstro
__init__.py
constants.py
conversion.py
observation.py
orbit.py
transformation.py

however, I find that several of the modules have the
same import statements:

orbit.py:

import numpy
import constants
import conversion
import observations

observations.py:

import numpy
import constants
import conversions
import transformations

The modules themselves are not overly large, but it bugs
me to have to import numpy twice (or even more as the
number of modules grow). Is there a way to import numpy
once in the package (like in the __init__.py file) such that
it is accessible to all the modules? Or is the multiple imports
just something one has to live with?

Thanks for any help or direction to webpages discussing this
topic.

Cheers
   Tommy



From wolf_tracks at invalid.com  Fri Sep 21 08:48:32 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Fri, 21 Sep 2007 12:48:32 GMT
Subject: Drawing a 640x480 Raw Image
In-Reply-To: <FROIi.3315$4J3.522@newssvr22.news.prodigy.net>
References: <QRGIi.54592$YL5.52604@newssvr29.news.prodigy.net>	<oaHIi.3304$4J3.1437@newssvr22.news.prodigy.net>
	<5lh5q2F87tctU1@mid.uni-berlin.de>
	<FROIi.3315$4J3.522@newssvr22.news.prodigy.net>
Message-ID: <A4PIi.8265$JD.8217@newssvr21.news.prodigy.net>

Oops. What I think I'm looking for is a way to open a data file of records 
that are 640x480 that are gray scaled. I probably need something like an 
open and a read. Once I've got that, then I need to place the raw image into 
a draw area on the canvas, so that I can draw on the image.

W. Watson wrote:
> Very good. I'll give it a try.
> 
> Marc 'BlackJack' Rintsch wrote:
>> On Thu, 20 Sep 2007 20:49:59 -0700, W. Watson wrote:
>>
>>> W. Watson wrote:
>>>> I'm getting a 640x480 greyscale image from a video device. I'd like 
>>>> to place it on a canvas and then draw on the image. Does PIL or some 
>>>> image facility allow me to do that?
>>> Corrected misspelling in Subject. The image here is nothing more than 
>>> a 640x480 byte array. Each byte is a gra[e]yscale value.
>>
>> PIL can do this:
>>
>> from PIL import Image
>>
>> def main():
>>     width = 640
>>     height = 480
>>     image = Image.new('L', (width, height))
>>     data = [x * y % 256 for x in xrange(width) for y in xrange(height)]
>>     image.putdata(data)
>>     image.save('test.png')
>>
>> `data` can be any iterable with byte values.
>>
>> Ciao,
>>     Marc 'BlackJack' Rintsch
> 

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From ddwiggins at advpubtech.com  Fri Sep 28 17:45:39 2007
From: ddwiggins at advpubtech.com (Don Dwiggins)
Date: Fri, 28 Sep 2007 14:45:39 -0700
Subject: ANNOUNCE: wxPython 2.8.6.0
In-Reply-To: <46FC8C4B.8000808@alldunn.com>
References: <46FC8C4B.8000808@alldunn.com>
Message-ID: <fdjsm4$9vr$1@sea.gmane.org>

Robin Dunn wrote:
> Announcing
> ----------
> 
> The 2.8.6.0 release of wxPython is now available for download at
> http://wxpython.org/download.php.  This release is mostly about fixing
> a number of bugs and inconsistencies in wxWidgets and wxPython.

This raises a policy question for me.  I'm currently on 2.8.3, not 
having had any clear need to upgrade for a while.  Is there any reason 
why I shouldn't continue to track the releases, but not upgrade to them 
until I need something specific (a fix for a bug, a new feature I want, 
...)?

For example, if I don't upgrade to 2.8.x.y when it comes out, might I 
have trouble in the future upgrading to 2.8.x+9.w?

BTW, since I haven't said it recently: thanks again for a really useful 
product and support forum for it!

-- 
Don Dwiggins
Advanced Publishing Technology



From mail at timgolden.me.uk  Mon Sep 10 10:12:30 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Mon, 10 Sep 2007 15:12:30 +0100
Subject: PyConUK 2007
Message-ID: <46E550CE.8070202@timgolden.me.uk>

For those who don't follow the UK Python scene, we've just
all come back from a *fantastic* weekend in Birmingham: the
very first PyCon UK. Terrific kudos to John Pinner and the
West Midlands Python team who made it all happen without
any serious mishaps, including registration with badges,
T-shirts etc. for 200 people, a sit-down dinner for 150,
dozens of speakers, lightning talks and keynote speakers,
a flawless WLAN, suitably cheap hotel accomodation, and
a great atmosphere.

The Blogs and photos are starting to appear:

   http://www.pyconuk.org/community/BlogsAndPhotos

and although it was the UK conference, you may see
quite a few European faces in there and even one
or two from the States and further afield. Look
forward to seeing you there next year!

TJG


From ricaraoz at gmail.com  Fri Sep 14 22:31:29 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Fri, 14 Sep 2007 23:31:29 -0300
Subject: Python 3K or Python 2.9?
In-Reply-To: <46e97917$0$9014$426a74cc@news.free.fr>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>	<46e7974d$0$31726$426a74cc@news.free.fr>	<fc8fc9$4qa$1@news2.carnet.hr>
	<5kq1hgF4r90oU1@mid.individual.net>	<1189618530.872819.136450@57g2000hsv.googlegroups.com>	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>	<5kr8vlF53m8gU3@mid.individual.net>	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>	<87sl5j5r34.fsf@benfinney.id.au>	<1189646281.569796.267940@d55g2000hsg.googlegroups.com>	<87ir6f5mrq.fsf@benfinney.id.au>	<1189651204.408268.57580@19g2000hsx.googlegroups.com>	<1i4dddf.piaojwz9lz40N%aleax@mac.com>	<1189700775.661780.292150@50g2000hsm.googlegroups.com>
	<46e97917$0$9014$426a74cc@news.free.fr>
Message-ID: <46EB4401.6070000@bigfoot.com>

Bruno Desthuilliers wrote:
> TheFlyingDutchman a ?crit :
>> Well I'm with Bruce Eckel - there shouldn't be any argument for the
>> object in the class method parameter list.
> 
> def fun(obj, *args, **kw):
>    # generic code here that do something with obj
> 
> import some_module
> some_module.SomeClass.fun = fun
> 
> This is why uniformity is important.
> 
> But anyway, I think it's quite clear that Python won't drop the explicit 
> self, so it looks like you have to live with it or choose another language.
> 
>> Bruce said that no other mainstream OO language is explicitly passing
>> the object as a parameter to class methods.
> 
> to methods. class methods gets the class as first parameter.
> 
> Anyway, there are a lot of things that Python doesn't do like "other 
> mainstream OO languages", and that's a GoodThing.
> 
> 
>> What I would like to have seen added to class definitions was the
>> forced declaration of all object variables in the class outside of
>> methods. I don't like the fact that they have to be, and can be
>> created in any method on the fly.
> 
> I definitively think you'd be happier with some other language.

<Ironic>

Hi, I'm new to Python, I don't even fully know the language, never done
a full project in Python. What's more, probably I'll never will.
But that's not the point, the point is I want YOU people to modify the
language you know in and out, the program with which you've done many
systems, I want you to change it to suit my whims, so that I'll be
comfortable with the 3 ten liners I'll write.
TIA

</Ironic>





From zzbbaadd at aol.com  Wed Sep 19 14:07:48 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Wed, 19 Sep 2007 11:07:48 -0700
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
In-Reply-To: <13f2hctdoob87e5@corp.supernews.com>
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<dea92f560709021735l2c72d53ew94410fcb33b9b50b@mail.gmail.com>
	<mailman.303.1188779927.28954.python-list@python.org>
	<1190164166.378500.155990@o80g2000hse.googlegroups.com>
	<13f2hctdoob87e5@corp.supernews.com>
Message-ID: <1190225268.547042.55370@d55g2000hsg.googlegroups.com>

On Sep 19, 8:51 am, Steven D'Aprano <st... at REMOVE-THIS-
cybersource.com.au> wrote:
> On Tue, 18 Sep 2007 18:09:26 -0700, TheFlyingDutchman wrote:
> > How much faster/slower would Greg Stein's code be on today's processors
> > versus CPython running on the processors of the late 1990's?
>
> I think a better question is, how much faster/slower would Stein's code
> be on today's processors, versus CPython being hand-simulated in a giant
> virtual machine made of clockwork?
>
> --
> Steven.

Steven, You forgot this part:

"And if you decide to answer, please add a true/false response
to this statement - "CPython in the late 1990's ran too slow"'.




From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Sep 26 03:54:51 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 26 Sep 2007 09:54:51 +0200
Subject: the address of list.append and list.append.__doc__
In-Reply-To: <1190780557.879816.13800@d55g2000hsg.googlegroups.com>
References: <1190775258.351819.24930@22g2000hsm.googlegroups.com>
	<mailman.1077.1190776788.2658.python-list@python.org>
	<1190780557.879816.13800@d55g2000hsg.googlegroups.com>
Message-ID: <46fa102d$0$26322$426a74cc@news.free.fr>

HYRY a ?crit :
>> No. a.append is a "bound method" - a method that already has an
>> associated instance, that will be provided as the first argument to the
>> method call. Bound methods are created "on the fly".
>>
> 
> Does this means there is no method to get the original methods from
> the Bound methods created "on the fly"?

There's no such thing as an "original method" - what's stored as an 
attribute of the class is a plain function. FWIW, you can get at this 
function quite easily - via the im_func attribute of the method.

Now what I wonder is what you want to do with the internal identifier of 
a function or method ? (please not that the use of the memory address as 
an id is purely an implementation detail of CPython).



From erik at myemma.com  Wed Sep 19 17:43:52 2007
From: erik at myemma.com (Erik Jones)
Date: Wed, 19 Sep 2007 16:43:52 -0500
Subject: Google and Python
In-Reply-To: <1190235678.019823.315850@o80g2000hse.googlegroups.com>
References: <1190228512.627109.308910@n39g2000hsh.googlegroups.com>
	<ufadnRC5BPZm6GzbnZ2dnUVZ_jOdnZ2d@comcast.com>
	<1190231094.276099.136250@22g2000hsm.googlegroups.com>
	<mailman.781.1190232163.2658.python-list@python.org>
	<1190235678.019823.315850@o80g2000hse.googlegroups.com>
Message-ID: <4C5C88E9-CDEA-4C7D-A890-A9C21E086BEE@myemma.com>

On Sep 19, 2007, at 4:01 PM, TheFlyingDutchman wrote:

> On Sep 19, 1:02 pm, Erik Jones <e... at myemma.com> wrote:
>> is usually Apache at most sites?
>>
>> No an http server and application server are two different things.
>> An http server services requests of a web server those requests can
>> be for static files or for services of a local application in which
>> case the request if forwarded on to the application.  An application
>> services requests of an application.  They are separate concepts,
>> often chained, although they are sometimes implemented together.
>> What they are saying here is that they have built a highly optimizing
>> custom web server in C++ that services web requests for services of
>> applications written in any of the three listed languages.  So, yes,
>> in this case it is what is often Apache in other installations.
>>
> OK, thanks. Would you know what technique the custom web server uses
> to invoke a C++ app (ditto for Java and Python) CGI is supposed to be
> too slow for large sites.

That's what SWIG is for:  interfacing C++ with other languages.

Erik Jones

Software Developer | Emma?
erik at myemma.com
800.595.4401 or 615.292.5888
615.292.0777 (fax)

Emma helps organizations everywhere communicate & market in style.
Visit us online at http://www.myemma.com




From arnodel at googlemail.com  Fri Sep  7 13:36:35 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Fri, 07 Sep 2007 10:36:35 -0700
Subject: getting the current function
In-Reply-To: <mailman.229.1189182388.2658.python-list@python.org>
References: <mailman.229.1189182388.2658.python-list@python.org>
Message-ID: <1189186595.875441.241470@50g2000hsm.googlegroups.com>

On Sep 7, 5:19 pm, Gary Robinson <gary... at mac.com> wrote:
> > This all seems a bit too complicated. Are you sure you want to do
> > this? Maybe you need to step back and rethink your problem.
>
> In version 2.1 Python added the ability to add function attributes -- seehttp://www.python.org/dev/peps/pep-0232/for the justifications. A counter probably isn't one of them, I just used that as a quick example of using thisfunc().
>
> I've just never liked the fact that you have to name the function when accessing those attributes from within the function. And I thought there might be other uses for something like thisfunc().
>

You can do this without fiddling with stack frames:

def bindfunction(f):
    def bound_f(*args, **kwargs):
        return f(bound_f, *args, **kwargs)
    bound_f.__name__ = f.__name__
    return bound_f

# Use like this:

@bindfunction
def factorial(this_function, n):
    if n > 0:
        return n * this_function(n - 1)
    else:
        return 1

# Interactively:

>>> factorial(5)
120
>>> fac = factorial
>>> factorial = "spam"
>>> fac(8)
40320
>>>

--
Arnaud




From max at alcyone.com  Mon Sep  3 21:49:23 2007
From: max at alcyone.com (Erik Max Francis)
Date: Mon, 03 Sep 2007 18:49:23 -0700
Subject: Python is overtaking Perl
In-Reply-To: <1188869347.102325.119830@w3g2000hsg.googlegroups.com>
References: <1188865943.238573.218750@w3g2000hsg.googlegroups.com>
	<20070904024908.b8aca60c.sulsa@gazeta.pl>
	<1188869347.102325.119830@w3g2000hsg.googlegroups.com>
Message-ID: <IrCdnQkp_ds-JEHbnZ2dnUVZ_iydnZ2d@speakeasy.net>

Asun Friere wrote:

> How do you figure that?  Isn't the chart showing the frequency of
> those particular terms combined as a fraction of the total search
> volume on Google?

Who knows?  The graph has no labeling or calibration for the y-axis, so 
it's meaningless.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   However much you knock at nature's door, she will never answer you in
    comprehensible words. -- Ivan Turgenev, 1860


From fakeaddress at nowhere.org  Thu Sep 27 04:11:29 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Thu, 27 Sep 2007 01:11:29 -0700
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <1190814263.104358.158090@n39g2000hsh.googlegroups.com>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>
	<1190753722.026806.254530@d55g2000hsg.googlegroups.com>
	<1190756003.292096.71130@o80g2000hse.googlegroups.com>
	<1190789981.385466.37870@57g2000hsv.googlegroups.com>
	<Xns99B760A3F5859duncanbooth@127.0.0.1>
	<87sl51lshd.fsf@mulj.homelinux.net>
	<1190799759.367001.106400@r29g2000hsg.googlegroups.com>
	<87fy11lo22.fsf@mulj.homelinux.net>
	<1190804538.469582.96950@22g2000hsm.googlegroups.com>
	<slrnffkjoa.hc2.apardon@rcpc42.vub.ac.be>
	<1190814263.104358.158090@n39g2000hsh.googlegroups.com>
Message-ID: <sAJKi.592$sw6.385@nlpi061.nbdc.sbc.com>

Mark Summerfield wrote:
> The sorteddict API that has emerged so far is (1) apart from the
> constructor, everything is identical to dict, (2) the constructor
> takes the same args as sorted(), so if you want to seed with a dict or
> with keywords you write sorteddict(dict(a=1,b=2), ...), (or you could
> create a sorteddict and use update() since that takes the same args as
> dict's constructor).
> 
> Could your AVLTree support cmp and keys and reverse?


I think you are expending too much effort on the no-brainers.
Yes, AVL-trees can support cmp and keys and reverse. I cannot
speak for Antoon, but have no doubt that adapting his code to
do so is within his ability.

Hrvoje Niksic is right that a simple layer over existing
hashed dicts "dooms the PEP to rejection". Thus the candidate
algorithms are the approximately-balanced tree structures:
AVL trees, red-black trees, 2-3 trees, b-trees, splay trees,
or skip-lists.

Implementing these is non-trivial, but easily within the
ability of many people here. Don't worry about the coding.


-- 
--Bryan


From reflex-dev-bounces at dcc.uchile.cl  Wed Sep  5 23:06:26 2007
From: reflex-dev-bounces at dcc.uchile.cl (reflex-dev-bounces at dcc.uchile.cl)
Date: Wed, 05 Sep 2007 23:06:26 -0400
Subject: Your message to Reflex-dev awaits moderator approval
Message-ID: <mailman.15.1189047986.5704.reflex-dev@dcc.uchile.cl>

Your mail to 'Reflex-dev' with the subject

    Test

Is being held until the list moderator can review it for approval.

The reason it is being held:

    Post by non-member to a members-only list

Either the message will get posted to the list, or you will receive
notification of the moderator's decision.  If you would like to cancel
this posting, please visit the following URL:

    http://reflex.dcc.uchile.cl/mailman/confirm/reflex-dev/0ad35f04f7a6585b804b0244f8706633fac538bd



From zzbbaadd at aol.com  Fri Sep 28 14:58:26 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Fri, 28 Sep 2007 11:58:26 -0700
Subject: Python 3.0 migration plans?
In-Reply-To: <mailman.1242.1191003389.2658.python-list@python.org>
References: <1191002679.569709.16870@22g2000hsm.googlegroups.com>
	<mailman.1242.1191003389.2658.python-list@python.org>
Message-ID: <1191005906.556751.261940@22g2000hsm.googlegroups.com>

On Sep 28, 11:16 am, Jean-Paul Calderone <exar... at divmod.com> wrote:
> On Fri, 28 Sep 2007 11:04:39 -0700, TheFlyingDutchman <zzbba... at aol.com> wrote:
> > [snip]
>
> >In this case I asked it as part of the original question and it was
> >ignored. I have programmed in C and C++ and a little Pascal many years
> >ago. I don't remember anything about Higher Order Functions and would
> >like to see exactly how you do it and to verify the contention.
>
> Perhaps you could do a bit of independent research.  Then your messages
> to the group could contain more thoughtful questions and responses.
>
But you miss the fact that I am providing value to the group by
providing unthoughtful questions and unthoughtful responses. By having
most of the pocket protectors being thrown at me, I provide a
diversion that allows others to speak more freely and without fear of
reproach.




From zzbbaadd at aol.com  Mon Sep 17 03:23:47 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Mon, 17 Sep 2007 00:23:47 -0700
Subject: Python 3K or Python 2.9?
In-Reply-To: <uir6ctto7.fsf@yahoo.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<uir6ctto7.fsf@yahoo.com>
Message-ID: <1190013827.107324.111820@w3g2000hsg.googlegroups.com>


> The other half of the confusion is cleared up by considering that
> Python methods are ordinary functions that don't magically "know" in
> which "class" context they are executing: they must be told via the
> first parameter.
>

They can be told all they want by the compiler/runtime - implicitly -
under-the-covers, out-of-sight.



From f.guerrieri at gmail.com  Wed Sep 19 03:35:20 2007
From: f.guerrieri at gmail.com (Francesco Guerrieri)
Date: Wed, 19 Sep 2007 09:35:20 +0200
Subject: Sets in Python
In-Reply-To: <1190185200.598314.216210@y42g2000hsy.googlegroups.com>
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
	<1190163542.585160.16230@w3g2000hsg.googlegroups.com>
	<1190185200.598314.216210@y42g2000hsy.googlegroups.com>
Message-ID: <79b79e730709190035m6536051dsb51b394eb20a7739@mail.gmail.com>

On 9/19/07, Paddy <paddy3118 at googlemail.com> wrote:

> frozenset over turning the embedded list into a tuple?
> The tuple would preserve order in the item (1,2)
>  a = set([1,2,3, (1,2)])

The OP was probably thinking in mathematical terms as in "the set of
all the possible subsets   of the set composed by 1, 2 and 3" and thus
order would not be important.

francesco


From nagle at animats.com  Tue Sep  4 14:31:50 2007
From: nagle at animats.com (John Nagle)
Date: Tue, 04 Sep 2007 18:31:50 GMT
Subject: FCGI app reloading on every request
In-Reply-To: <MPG.21478b09a5d2650d989710@news.individual.de>
References: <46DCDE59.8060109@animats.com>
	<MPG.21478b09a5d2650d989710@news.individual.de>
Message-ID: <qwhDi.23908$eY.9978@newssvr13.news.prodigy.net>

Thorsten Kampe wrote:
> * John Nagle (Mon, 03 Sep 2007 21:26:01 -0700)
> 
>>    I'm converting a web app from CGI to FCGI.  The application works fine
>>under FCGI, but it's being reloaded for every request, which makes FCGI
>>kind of pointless.  I wrote a little FCGI app which prints when the program is 
>>loaded and when it gets a request.  And indeed, the program gets reloaded for
>>each HTTP request.  Something is probably misconfigured.  But what?
>>[...]
>>On the Python side, I'm using Python 2.5 on Linux, with Alan
>>Saddi's "fcgi.py" module.
> 
> 
> Do you use fcgi.py or flup? Go for flup

    I think that's irrelevant.  The Python app is being launched in
CGI mode, indicating trouble on the Apache side.

    Anything executable in the
cgi-bin directory is being launched as a CGI program.  A file
named "example.foo", if executable, will launch as a CGI program.
Nothing launches with FCGI.

    Tried putting this in the .htaccess file:

<Files *.fcgi>
SetHandler fcgid-script
Options ExecCGI
allow from all
</Files>

<Files *.foo>
ErrorDocument 403 "File type not supported."
</Files>

     Even with that, a ".foo" file gets executed as a CGI script,
and so does a ".fcgi" file.  It's an Apache configuration problem.

				John Nagle


From carsten at uniqsys.com  Wed Sep  5 12:32:45 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Wed, 05 Sep 2007 12:32:45 -0400
Subject: sqlite3.OperationalError: Could not decode to UTF-8 column
In-Reply-To: <fbmirn$4lp$1@cronus.fccn.pt>
References: <fbmirn$4lp$1@cronus.fccn.pt>
Message-ID: <1189009965.3378.26.camel@dot.uniqsys.com>

On Wed, 2007-09-05 at 16:40 +0100, Filipe Sousa wrote:
> Hi
> 
> I'm trying to use sqlite with python 2.5 but I have this problem:
> 
> Traceback (most recent call last):
>    File "converter.py", line 13, in <module>
>      c_old.execute('select id_aluno, nome from aluno')
> sqlite3.OperationalError: Could not decode to UTF-8 column 'nome' with 
> text 'Ana Margarida Fernandes Gon?alves de S?'
> 
> The database was created with another program and all data is in 
> database is in latin1.

Try setting

conn.text_factory = str

where conn is the name of your sqlite3 connection object. See
http://docs.python.org/lib/sqlite3-Connection-Objects.html for more
information.

HTH,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From timr at probo.com  Thu Sep 13 00:57:40 2007
From: timr at probo.com (Tim Roberts)
Date: Thu, 13 Sep 2007 04:57:40 GMT
Subject: Error in random module, bad installation?
References: <1189635238.655642.233240@g4g2000hsf.googlegroups.com>
Message-ID: <9lghe31glgpq8ge20ko3t1nqui0h9oag2a@4ax.com>

Andrew F <andrew.lee at nymag.com> wrote:

>I'm a linux user and I just upgraded from 2.1 to 2.5 and changed the
>location of a number of libraries and tools.
>
>So far I've tracked most errors, but this one has me scratching my
>head :
>
>$ which python
>/usr/local/bin/python
>$ echo $PYTHONPATH
>/usr/local/bin/python

PYTHONPATH is supposed to point to the directory containing modules, NOT
the directory containing the executable.  It should be /lib/python2.5.

However, Carsten had the real cause for your immediate problem.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From lasses_weil at klapptsowieso.net  Thu Sep 13 10:16:03 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Thu, 13 Sep 2007 16:16:03 +0200
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <13eigagsuk74l55@corp.supernews.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>	<1189666095.727426.135170@o80g2000hse.googlegroups.com>	<1189685403.306218.13270@22g2000hsm.googlegroups.com>
	<13eigagsuk74l55@corp.supernews.com>
Message-ID: <46e94623$0$30375$9b4e6d93@newsspool4.arcor-online.net>

Steven D'Aprano wrote:
> On Thu, 13 Sep 2007 12:10:03 +0000, timothy.soehnlin at gmail.com wrote:
> 
>> Why not use '_' as the self variable.  It is minimal and achieves close
>> to '.var', as '_.var' isn't that different.  I know its a little
>> perl-esque, but its not a bad convention if you are aiming to up
>> readability of your code.
> 
> I think the definitions of "up" or "readability" you are using are very 
> different from mine. To me, to up something means to increase it, and 
> readability means the ease of comprehension when reading something. You 
> seem to be using the opposite definition for one or the other.
> 
> 
OK, making a pointless reply to pointless reply, but anyway:

I see merit in using

   (_.foo + _.bar) * _.baz

instead of

   (s.foo + s.bar) * s.baz

because I'm trained to interpret the underscore as a synonym for one 
space. It's not particularly beautiful, but that is probably a matter of 
habituation. And that exact word is probably the reason why I'd still 
use self or s (explained by a comment, because I can get very dumb if I 
have to).

It's a matter of taste, so there is no point in bashing a valid suggestion.

/W (I am aware that I'm banging a philosophy on people's heads just as 
Steven did, so I'm no better, I know.)


From ldo at geek-central.gen.new_zealand  Sun Sep  9 02:49:12 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sun, 09 Sep 2007 18:49:12 +1200
Subject: Python syntax wart
References: <fbvvil$7dj$1@lust.ihug.co.nz> <5khh6nF3i5nuU1@mid.uni-berlin.de>
	<46E390B7.2080808@web.de>
Message-ID: <fc0518$aa2$5@lust.ihug.co.nz>

In message <46E390B7.2080808 at web.de>, Stefan Behnel wrote:

> He means he has to use backslashes instead of parentheses here.
> 
> Which is not true, you could easily rephrase this as:
> 
>     for link in GetEachRecord(
>              "links",
>              ....):
>         out.write(
>              ....
>              )
> 
> See? No backslash!

But then you can no longer use indentation to display the two-dimensional
structure of the statement.


From fakeaddress at nowhere.org  Sat Sep  1 07:25:34 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Sat, 01 Sep 2007 04:25:34 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <mailman.120.1188423362.28954.python-list@python.org>
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>	<1188364909.397692.209170@q4g2000prc.googlegroups.com>	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>	<1188369928.755777.142690@i38g2000prf.googlegroups.com>	<4866bea60708291013g56b3dea9m7abcf5e4e4f6e29c@mail.gmail.com>
	<mailman.120.1188423362.28954.python-list@python.org>
Message-ID: <K_bCi.721$7P7.506@newssvr19.news.prodigy.net>

Steve Holden wrote:
[...]
> If I can blow my own trumpet briefly, two customers (each using over 25 
> kLOC I have delivered over the years) ran for two years while I was away 
> in the UK without having to make a single support call. One of the 
> systems was actually locked in a cupboard all that time (though I have 
> since advised that client to at least apply OS patches to bring it up to 
> date).

> This was achieved by defensive programming, understanding the user 
> requirements and just generally knowing what I was doing.

On the one hand, nice work. Made your customers happy and kept
them happy. Can't argue with success. On the other hand, 25K lines
is tiny by software engineering standards. If a support call would
have to go to you, then the project must be small. Software
engineering is only a little about an engineer knowing or not
knowing what he or she is doing; the bigger problem is that
hundreds or thousand of engineers cannot possibly all know what
all the others are doing.

I work on large and complex systems. If I screw up -- O.K., face
facts: *when* I screw up -- the chance of the issue being assigned
to me is small. Other engineers will own the problems I cause,
while I work on defects in code I've never touched. I wish I could
own all my own bugs, but that's not how large and complex systems
work. Root-cause analysis is the hard part. By the time we know
what went wrong, 99.99% of the work is done.


Design-by-contract (or programming-by-contract) shines in large
and complex projects, though it is not a radical new idea in
software engineering. We pretty much generally agree that we want
strong interfaces to encapsulate implementation complexity.
That's what design-by-contract is really about.

There is no strong case for adding new features to Python
specifically for design-by-contract. The language is flexible
enough to support optionally-executed pre-condition and
post-condition checks, without any extension. The good and bad
features of Python for realizing reliable abstraction are set
and unlikely to change. Python's consistency and flexibility
are laudable, while duck-typing is a convenience that will
always make it less reliable than more type-strict languages.


-- 
--Bryan



From acirulli at gmail.com  Mon Sep  3 10:56:10 2007
From: acirulli at gmail.com (Andrea)
Date: Mon, 03 Sep 2007 07:56:10 -0700
Subject: Problem with extremely small real number
Message-ID: <1188831370.133673.205230@r29g2000hsg.googlegroups.com>

Hi,
I need to calculate this probability P!/{n \choose p}, varying both n
and p, n takes values in this range [512:1024] and p in [2:12].
So i write this code in python:

def factorial(n):
	result=1
	if n==0: return 1
	for i in xrange(1, abs(n)+1):
		result = i*result
	if n >= 0:
		return result
	else:
		return -result
def binomial(n, k):
	assert n>0 and isinstance(n, (int, long)) and isinstance(k,
(int,long))
	if k < 0 or k > n:
		return 0
	if k == 0 or k == n:
		return 1
	return factorial(n) // (factorial(k) * factorial(n-k))

I want to call factorial(2)//binomial(1024,2) for example, in this way
trivially I obtain 0 as probability, how can I obtain the probability
forcing this division to output extremely small real numbers????

I want to produce a program that provide a set of data of this
probability on varying n and p, in order to plot a surface with this
data set with gnuplot, any comments or suggestion?
thanks in advance,
Andrea



From bronger at physik.rwth-aachen.de  Sat Sep  8 13:54:18 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Sat, 08 Sep 2007 19:54:18 +0200
Subject: /dev/null as a file-like object, or logging to nothing
References: <87k5r1jdzq.fsf@wilson.homeunix.com>
	<mailman.273.1189272501.2658.python-list@python.org>
Message-ID: <87bqcdjb5h.fsf@wilson.homeunix.com>

Hall?chen!

Carsten Haese writes:

> On Sat, 2007-09-08 at 18:52 +0200, Torsten Bronger wrote:
>
>> Is there a portable and simply way to direct file-like IO to
>> simply nothing?  [...]
>>
>> [...]
>
> This might work:
>
> class LogSink(object):
>     def write(self, *args, **kwargs): pass
>     def flush(self, *args, **kwargs): pass
>
> logging.basicConfig(stream=LogSink())
>
> I haven't tested this thoroughly, so it's possible that there are
> more methods that the stream is expected to implement.

No, write and flush are enough.  Thank, this works.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From Astley.lejasper at gmail.com  Wed Sep 12 11:25:52 2007
From: Astley.lejasper at gmail.com (Astley Le Jasper)
Date: Wed, 12 Sep 2007 15:25:52 -0000
Subject: National grid to lat long conversion
In-Reply-To: <mailman.74.1188322935.28954.python-list@python.org>
References: <1188295755.877801.217710@r29g2000hsg.googlegroups.com>
	<mailman.74.1188322935.28954.python-list@python.org>
Message-ID: <1189610752.426514.228230@g4g2000hsf.googlegroups.com>

Hi,

I was a bit limited with time so in the end used an online service
with an API which is great for the limited number of look-ups I
needed. It can be found at:

http://www.nearby.org.uk/

It was also very useful for site for other conversions and lookups.

I manage to find a couple of other examples in other languages which I
might have used as the basis for some pythonification.

PHP
- http://www.megalithia.com/search/llfuncshighlight.php
- http://www.jstott.me.uk/phpcoord/

Javascript
- http://www.movable-type.co.uk/scripts/latlong-gridref.html

Cheers

Neil



From gagsl-py2 at yahoo.com.ar  Thu Sep  6 23:35:24 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 07 Sep 2007 00:35:24 -0300
Subject: Passing a tuple to a function as multiple arguments
References: <789865.44579.qm@web313.biz.mail.mud.yahoo.com>
Message-ID: <op.tx9llailx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 07 Sep 2007 00:02:12 -0300, Ben Warren <bwarren at qstreams.com>  
escribi?:

> Hello,
>
> Let's say I have a function with a variable number of arguments (please  
> ignore syntax errors):
>
> def myfunc(a,b,c,d,...):
>
> and I have a tuple whose contents I want to pass to the function.  The  
> number of elements in the tuple will not always be the same.
>
> T = A,B,C,D,...
>
> Is there a way that I can pass the contents of the tuple to the function  
> without explicitly indexing the elements?  Something like:
>
> myfunc(magic(T))

Use *T when calling the function:

py> def myfunc(a, b, c, d=None, e=None):
...   print a,b,c,d,e
...
py> T = 1,2,3,4,5
py> myfunc(*T)
1 2 3 4 5
py> T = 1,2,3
py> myfunc(*T)
1 2 3 None None
py> T = 1,2
py> myfunc(*T)
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
TypeError: myfunc() takes at least 3 arguments (2 given)

A similar syntax works when defining a function: *args will receive all  
remaining positional arguments joined into a tuple:

py> def otherfunc(a, b, *args):
...   print a, b, args
...
py> otherfunc(1,2,3,4,5)
1 2 (3, 4, 5)
py> T = 1,2,3,4
py> otherfunc(*T)
1 2 (3, 4)
py> otherfunc('a','b','c',*T)
a b ('c', 1, 2, 3, 4)

This is covered in the Python Tutorial at  
<http://docs.python.org/tut/node6.html#SECTION006700000000000000000> and  
you can read the nasty details here <http://docs.python.org/ref/calls.html>

-- 
Gabriel Genellina



From istvan.albert at gmail.com  Wed Sep 12 10:39:46 2007
From: istvan.albert at gmail.com (Istvan Albert)
Date: Wed, 12 Sep 2007 14:39:46 -0000
Subject: MemoryError on reading mbox file
In-Reply-To: <1189589259.662667.149730@w3g2000hsg.googlegroups.com>
References: <1189589259.662667.149730@w3g2000hsg.googlegroups.com>
Message-ID: <1189607986.628841.215930@50g2000hsm.googlegroups.com>

On Sep 12, 5:27 am, Christoph Krammer <redtige... at googlemail.com>
wrote:

>     string = self._file.read(stop - self._file.tell())
> MemoryError

This line reads an entire message into memory as a string. Is it
possible that you have a huge email in there (hundreds of MB) with
some attachment encoded as text?

Either way, the truth is that many modules in the standard library are
not well equipped to deal with large amounts of data. Many of them
were developed before gigabyte sized files were even possible to store
let alone process. Hopefully P3K will alleviate many of these problems
by its extensive use of generators.

For now I would recommend that you split your mbox file into several
smaller ones. (I think all you need is to split at the To: fields) and
run your script on these individual files.

i.










From wizzardx at gmail.com  Wed Sep 12 06:05:27 2007
From: wizzardx at gmail.com (David)
Date: Wed, 12 Sep 2007 12:05:27 +0200
Subject: setattr vs readonly property
In-Reply-To: <1189588059.059818.301090@y42g2000hsy.googlegroups.com>
References: <1189588059.059818.301090@y42g2000hsy.googlegroups.com>
Message-ID: <18c1e6480709120305x5cd22a3cnc59bc0aec18a9943@mail.gmail.com>

> My main purpose for using setattr(object, attr, value) for assign
> values from a dict that has some keys that may not be present on some
> object's attibute, which makes it work for me. My problem is dealing
> with read only attribute like sample_attribute =
> property(f_get=_get_sample_attribute). what approach should I use? Or
> is my first approach In the first place right?

You could try catching the exception thrown when you attempt to assign
to a read-only attribute. Although you may get consistency issues. ie
your object doesn't have all the details from the dict, but the
calling code expects them to be set. Perhaps you should provide
"setter" methods for the properties also, so that your objects
internal state gets set correctly.

eg: in your class declaration:

def setfoo(self, value):
   # Add code here to check 'value' and set internal 'foo' state correctly
   self._foo = value

def getfoo(self):
   return self._foo

foo = property(setfoo, getfoo)


From kay.schluehr at gmx.net  Sat Sep 22 05:44:35 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Sat, 22 Sep 2007 02:44:35 -0700
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <5lk2olF8gic1U5@mid.uni-berlin.de>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<1190413322.962737.53900@r29g2000hsg.googlegroups.com>
	<1190414192.636397.146450@57g2000hsv.googlegroups.com>
	<1190443748.907702.154660@22g2000hsm.googlegroups.com>
	<7xlkazgpc5.fsf@ruckus.brouhaha.com>
	<1190447257.060479.141280@n39g2000hsh.googlegroups.com>
	<5lk2olF8gic1U5@mid.uni-berlin.de>
Message-ID: <1190454275.282176.90830@k79g2000hse.googlegroups.com>

On Sep 22, 10:40 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Sat, 22 Sep 2007 00:47:37 -0700, Kay Schluehr wrote:
> > On 22 Sep., 08:56, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> >> Kay Schluehr <kay.schlu... at gmx.net> writes:
> >> > If you feel you can transform it into another unambigous grammar
> >> > mixing statements and expressions it's up to you.
>
> >> We got rid of the print statement for python 3.0.  Why not get rid
> >> of the rest of them too?  Just use expressions for everything, as
> >> works fine for plenty of other languages.
>
> > One might create a new dynamic functional+OO programming language,
> > where small statements like print, assert, raise etc. all become
> > functions and statements like while, for, with etc. become anonymous
> > closures.
>
> Before someone starts to create such a thing he should take a look at Io
> which has just objects and methods.
>
>  http://www.iolanguage.com/
>
> Ciao,
>         Marc 'BlackJack' Rintsch

I checked out Io once and I disliked it. I expected Io's prototype OO
being just a more flexible variant of class based OO but Io couples a
prototype very closely to its offspring. When A produces B and A.f is
modified after production of B also B.f is modified. A controls the
state of B during the whole lifetime of B. I think parents shall not
do this, not in real life and also not in programming language
semantics.

There was another, similar and also abandoned project a while ago
heading for prototype OO called Prothon:

http://mail.python.org/pipermail/python-announce-list/2004-March/002966.html

When I remember correctly it was killed not because it was too
ambitious but the author lost his vision and didn't want to grow
Prothons ecosystem.




From bj_666 at gmx.net  Fri Sep  7 08:45:12 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 7 Sep 2007 12:45:12 GMT
Subject: Generating a unique identifier
References: <13e2fgbbpsatm39@corp.supernews.com>
Message-ID: <5kcveoF31i6hU3@mid.uni-berlin.de>

On Fri, 07 Sep 2007 12:03:23 +0000, Steven D'Aprano wrote:

> I have an application that will be producing many instances, using them 
> for a while, then tossing them away, and I want each one to have a unique 
> identifier that won't be re-used for the lifetime of the Python session.
> 
> I can't use the id() of the object, because that is only guaranteed to be 
> unique during the lifetime of the object.
> 
> For my application, it doesn't matter if the ids are predictable, so I 
> could do something as simple as this:
> 
> def unique_id():
>     n = 1234567890
>     while True:
>         yield n
>         n += 1
> 
> unique_id = unique_id()
> 
> while Application_Is_Running:
>     make_an_object(id=unique_id())
>     do_stuff_with_objects()
>     delete_some_of_them()
> 
> which is easy enough, but I thought I'd check if there was an existing 
> solution in the standard library that I missed.

For that easy solution you can use `itertools.count()`.

Ciao,
	Marc 'BlackJack' Rintsch


From quentel.pierre at wanadoo.fr  Wed Sep 19 02:02:29 2007
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: Wed, 19 Sep 2007 06:02:29 -0000
Subject: Processing drag & drop on the desktop
In-Reply-To: <1uSdnaNGwMvgBXPbnZ2dnUVZ_tjinZ2d@comcast.com>
References: <1189961614.510561.194610@w3g2000hsg.googlegroups.com>
	<1uSdnaNGwMvgBXPbnZ2dnUVZ_tjinZ2d@comcast.com>
Message-ID: <1190181749.502414.195730@r29g2000hsg.googlegroups.com>

On 17 sep, 17:08, Larry Bates <larry.ba... at websafe.com> wrote:
> Pierre Quentel wrote:
> > Hi all,
>
> > I would like to create an application on a Windows machine, such that
> > when a document is dragged and dropped on the application icon on the
> > desktop, the document is processed by the application
>
> > For instance, if I drag & drop an Outlook message or a PPT
> > presentation, the application would propose to tag the document with
> > keywords taken from a database
>
> > Is it possible to do this with a Python script, and how ?
>
> > Regards,
> > Pierre
>
> If you write a python application and put a shortcut on the desktop, when you
> drop any file on it in Windows it is passed into the program via the sys.argv
> list as the second (e.g. sys.argv[1]) argument.  If you drop multiple files,
> they are passed in sys.argv[1] sys.argv[n].  All you need to do is to pick up
> the filename and do your processing.
>
> -Larry- Masquer le texte des messages pr?c?dents -
>
> - Afficher le texte des messages pr?c?dents -

Thanks for the answers, but it still doesn't work

I tried to do this : create a Python script with
================
import sys
out = open("dummy","wb")
out.write(str(sys.argv))
out.close()
===============

then put a shortcut to this script on the desktop

When I drop a file on the shortcut, nothing happens (when I double-
click on the shorcut, a console window opens and sys.argv is actually
stored in the file)

Am I missing something ?

Regards,
Pierre



From vinay_sajip at yahoo.co.uk  Tue Sep 25 08:38:35 2007
From: vinay_sajip at yahoo.co.uk (Vinay Sajip)
Date: Tue, 25 Sep 2007 05:38:35 -0700
Subject: strange behavious of the logging module?
In-Reply-To: <fdahi5$4e4$03$2@news.t-online.com>
References: <fd6n9i$8hc$1@news1.zdv.uni-mainz.de>
	<fd7nf6$g14$02$1@news.t-online.com>
	<1190643051.084144.230220@o80g2000hse.googlegroups.com>
	<fd8l4n$9o1$03$1@news.t-online.com>
	<1190672978.233964.232900@g4g2000hsf.googlegroups.com>
	<fdaepi$k6m$00$1@news.t-online.com>
	<fdaga7$e7j$1@news1.zdv.uni-mainz.de>
	<fdahi5$4e4$03$2@news.t-online.com>
Message-ID: <1190723915.218110.170720@k79g2000hse.googlegroups.com>

On 25 Sep, 09:40, Peter Otten <__pete... at web.de> wrote:
> You could try setting
>
> logging._srcfile =logging.info.func_code.co_filename
>
> manually, but that might break other things. Or you recreate the pyc-files
> of your distribution. Again, I don't know what might break...
>

Recreating .pyc files should not break anything - this will get done
automatically, so deleting the .pyc and/or .pyo files in the Python/
Lib directory tree should be sufficient. See the issues linked to by

http://bugs.python.org/msg24988

In these cases, deleting the .pyc/.pyo files solved the problem.

Best regards,

Vinay



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Sep 10 07:45:12 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 10 Sep 2007 13:45:12 +0200
Subject: Python syntax wart
References: <fbvvil$7dj$1@lust.ihug.co.nz>
	<1189405211.875217.176620@57g2000hsv.googlegroups.com>
Message-ID: <5kkp28F46jjuU2@mid.individual.net>

TheFlyingDutchman wrote:

> It may be that a language that doesn't have a statement terminator
> (which can be end-of-line) needs a statement continuation symbol.

Which language could that be? I can hardly imagine making a complex
program out of one statement.

Regards,


Bj?rn

-- 
BOFH excuse #147:

Party-bug in the Aloha protocol.



From carsten at uniqsys.com  Wed Sep 26 06:33:21 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Wed, 26 Sep 2007 06:33:21 -0400
Subject: %s shortcut?
In-Reply-To: <1190775317.062210.234400@g4g2000hsf.googlegroups.com>
References: <1190775317.062210.234400@g4g2000hsf.googlegroups.com>
Message-ID: <1190802801.3397.17.camel@dot.uniqsys.com>

On Wed, 2007-09-26 at 02:55 +0000, james_027 wrote:
> hi i have something like this
> 
> cursor.execute("""
>             select c.name,
>                 (select from ap_invoice i where Month(i.date) = 1 and
> Year(i.date) = %s and i.customer_id = c.id and i.status != 'CAN') jan,
>                 (select from ap_invoice i where Month(i.date) = 2 and
> Year(i.date) = %s and i.customer_id = c.id and i.status != 'CAN') feb,
>                 (select from ap_invoice i where Month(i.date) = 3 and
> Year(i.date) = %s and i.customer_id = c.id and i.status != 'CAN') mar
>             from ap_customer c
>             order by %s""",
>             [year, order_by])

In addition to previously made suggestions of using parameter binding,
I'd like to point out the following:

1) Aren't you missing at least one expression between "select" and
"from" in your subqueries? I'd imagine you'd have to select
sum(i.amount) or something like that.

2) Why do you use subqueries at all? I think it would be much more
efficient to let the database return the months as rows instead of
columns, and rearrange the results into columns in Python logic:

cursor.execute("""
   select c.name, month(i.date), sum(i.amount)
     from ap_customer c, ap_invoice i
    where i.customer_id = c.id and i.status != 'CAN'
      and year(i.date) = %s group by 1,2 order by %s"""
   % [year, order_by])

3) Instead of doing a filter on year(i.date), you should try "i.date
between start_date and end_date" (where start_date and end_date are
supplied appropriately). That way, the database might be able to use an
index on the date column, which it might not otherwise be able to do.

Hope this helps,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From zzbbaadd at aol.com  Thu Sep  6 01:54:55 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Wed, 05 Sep 2007 22:54:55 -0700
Subject: Using wild character
In-Reply-To: <1189054805.447871.213150@y42g2000hsy.googlegroups.com>
References: <1189054805.447871.213150@y42g2000hsy.googlegroups.com>
Message-ID: <1189058095.671230.262190@o80g2000hse.googlegroups.com>

On Sep 5, 10:00 pm, Sreeraj <sreeraj22... at gmail.com> wrote:
> hi,
>
>  I am a beginner in Python. I wish to know how can i filter a list of
> strings using wild characters.ie
> Lets say i have list countries =
> ["india","africa","atlanta","artica","nigeria"]. I need only the list
> of string starting with 'a'.
>
> thank you
>
> Sreeraj

The most thorough answer would no doubt involve regular expressions,
but they can be unpleasant.

To do a "string*" type wildcard filter as in your request:

myList =  ["india","africa","atlanta","artica","nigeria"]

newList = [ item for item in myList if item.startswith("a") ]


To do a "*string" wildcard filter use the endswith() function instead
of startswith() and to do a *string* type wildcard filter use
the find() function > -1.



From munncha at gmail.com  Sun Sep 23 21:51:46 2007
From: munncha at gmail.com (Kurtis Heimerl)
Date: Sun, 23 Sep 2007 18:51:46 -0700
Subject: Preemption in python
In-Reply-To: <op.ty4lmjflx6zn5v@a98gizw.cpe.telecentro.net.ar>
References: <9a4753250709221928s5768b15emecfd71a0f476cce@mail.gmail.com>
	<1190572311.5703.4.camel@thinkpad>
	<9a4753250709231210l701a2cccge014732c79a5fdf9@mail.gmail.com>
	<op.ty4lmjflx6zn5v@a98gizw.cpe.telecentro.net.ar>
Message-ID: <9a4753250709231851x12885c96s62b11ef0dc823bdc@mail.gmail.com>

Thanks a ton!

Just for the eventual webcrawler that logs this, the gtk package requires a
separate thread init function to allow python threads to play nice.

On 9/23/07, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>
> En Sun, 23 Sep 2007 16:10:03 -0300, Kurtis Heimerl <munncha at gmail.com>
> escribi?:
>
> > I'll explain a bit more. This thread is spawned, I also have the main
> > thread
> > running a gtk windowed gui. The gui has it's own threads to deal with
> > button
> > presses and such. The problem is that the gui never seems to let anyone
> > else
> > run. Only on button presses that cause blocking calls (
> > ossaudiodev.audio.read for instance) does the reader thread print
> > anything.
>
> Google for "python gtk threading tutorial"
>
> --
> Gabriel Genellina
>
> --
> http://mail.python.org/mailman/listinfo/python-list
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From hniksic at xemacs.org  Wed Sep 19 03:31:57 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Wed, 19 Sep 2007 09:31:57 +0200
Subject: super() doesn't get superclass
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au>
Message-ID: <87k5qn5cwi.fsf@mulj.homelinux.net>

Ben Finney <bignose+hates-spam at benfinney.id.au> writes:

> Evan is claiming that "the next class in the MRO _is_ a superclass",
> apparently by his definition or some other that I've not seen.

The definition of superclass is not the issue, the issue is
"superclass *of which class*"?  You expect super(A, self) to iterate
only over superclasses of A, even when self is an instance of a
subtype of A.  What really happens is that super(A, self) yields the
next method in type(self)'s MRO, which can and does cause include
classes that are not by any definition superclasses of A.  All of
those classes are, however, superclasses of the instance's type.

I think it is not possible to have super(A, self) only call
superclasses of A and at the same time having multiple inheritance
work without calling some methods in the hierarchy twice or not at
all.  Guido's paper at http://tinyurl.com/qkjgp explains the reasoning
behind super in some detail.

>> I agree that the documentation for super is somewhat misleading (and
>> obviously wrong),
>
> Well, that's the first time someone has acknowledged that in this
> thread, so I guess this is something.

For the record, I also agree with that.  The documentation should
document in some detail that super(type, obj) yields superclasses of
type(obj), not of type, and that the "type" argument is only used for
super to be able to locate the next type in the list.

>> I wouldn't use such an extreme word as 'madness', but I totally agree
>> that this should be corrected. Care to submit a doc patch ?
>
> I don't understand what practical uses 'super' is intended for

It's intended for cooperative multiple inheritance, a la CLOS's
call-next-method.


From mail at timgolden.me.uk  Thu Sep 20 09:10:34 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 20 Sep 2007 14:10:34 +0100
Subject: how to convert xml file to word document.
In-Reply-To: <1190293176.702616.235480@e9g2000prf.googlegroups.com>
References: <1190293176.702616.235480@e9g2000prf.googlegroups.com>
Message-ID: <46F2714A.5010008@timgolden.me.uk>

prajwala wrote:
>    I want to convert xml file to a word document using python. Is
> there
> any built in module available?
>    or Is there any other way to convert xml file to word document.

Insofar as it is textual, an xml file *is* a Word document.
Just open it up in Word and see. I assume you mean something
else, but at the moment you're not telling us what that is.

TJG


From steve at REMOVE-THIS-cybersource.com.au  Tue Sep 11 18:27:02 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Tue, 11 Sep 2007 22:27:02 -0000
Subject: Enum class with ToString functionality
References: <1189416537.050002.61120@r34g2000hsd.googlegroups.com>
	<87bqca9hrw.fsf@benfinney.id.au>
	<1189472591.797327.189180@w3g2000hsg.googlegroups.com>
Message-ID: <13ee5hmhmgr3d14@corp.supernews.com>

On Mon, 10 Sep 2007 18:03:11 -0700, TheFlyingDutchman wrote:

>> I'd like to know if the Cheeseshop package 'enum' is useful to you. Any
>> constructive feedback would be appreciated.
>>
>>     <URL:http://cheeseshop.python.org/pypi/enum/>
> 
> Looking at the documentation it looks excellent. But I don't understand
> the 0.4.2 version number, particularly when you refer to it as robust.

Perhaps Ben should have followed the usual practice of commercial, closed-
source software developers and started counting his version numbers at 
one instead of zero, miss a few releases, use randomly large increments 
occasionally, and ended up with a current version number of 2.7.1 for the 
exact same level of functionality.

Or he could have called it "Enum XP" (for "eXtra Programming" perhaps) or 
"Enum 2007". The next minor release could be "Enum 2008", and the next 
major update could be called "Enum Professional Capowie!!!".


-- 
Steven.


From enleverlesX.XmcX at XmclaveauX.com  Wed Sep 26 05:59:23 2007
From: enleverlesX.XmcX at XmclaveauX.com (Méta-MCI (MVP))
Date: Wed, 26 Sep 2007 11:59:23 +0200
Subject: PyS60
References: <1190731662.584011.105500@o80g2000hse.googlegroups.com>
Message-ID: <46fa325c$0$5098$ba4acef3@news.orange.fr>

Hi!

I am also interested by Python on Symbian-series 60

@+

Michel Claveau



From python.list at tim.thechases.com  Sun Sep 30 09:51:11 2007
From: python.list at tim.thechases.com (Tim Chase)
Date: Sun, 30 Sep 2007 08:51:11 -0500
Subject: Optparse and help formatting?
In-Reply-To: <13fv8ia94nq69d3@corp.supernews.com>
References: <mailman.1294.1191120597.2658.python-list@python.org>	<87abr423hu.fsf@benfinney.id.au>	<mailman.1303.1191155842.2658.python-list@python.org>
	<13fv8ia94nq69d3@corp.supernews.com>
Message-ID: <46FFA9CF.3030604@tim.thechases.com>

>>   def format_option(self, option):
>>     # The help for each option consists of two parts: 
>>     #   * the opt strings and metavars
> [snip]
> 
> Tim, I notice you're using lots of # lines as comments to describe the 
> function. Perhaps you should consider using docstrings instead.
> 
> Pardon me if I'm telling you what you already know... 

Yes, I do know about and use docstrings, and no, no offense
taken.  You'll have to persuade the [Debian/Python] maintainer of
optparse.py from whom I pilfered the code.  :)

tim at rubbish:~$ sed -n '/def format_option(/{N;N;N;N;N;p}'
/usr/lib/python2.4/optparse.py

    def format_option(self, option):
        # The help for each option consists of two parts:
        #   * the opt strings and metavars
        #     eg. ("-x", or "-fFILENAME, --file=FILENAME")
        #   * the user-supplied help string
        #     eg. ("turn on expert mode", "read data from FILENAME")


-tim






From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Sep 17 11:00:24 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 17 Sep 2007 17:00:24 +0200
Subject: Python "with"
In-Reply-To: <fclom8$8h6$1@news2.u-psud.fr>
References: <fck2di$7to$1@ss408.t-com.hr> <fcleos$2rt$1@news2.u-psud.fr>
	<fclikb$blt$1@news2.carnet.hr> <fclom8$8h6$1@news2.u-psud.fr>
Message-ID: <46ee9686$0$9002$426a74cc@news.free.fr>

Laurent Pointal a ?crit :
(snip)

> Note3: Its funny to see how Python users tries to change the language, 

s/Python users/some new Python users/, IMHO.


From grante at visi.com  Wed Sep 12 19:40:43 2007
From: grante at visi.com (Grant Edwards)
Date: Wed, 12 Sep 2007 23:40:43 -0000
Subject: I want py2exe not to create library.zip
References: <mailman.452.1189627963.2658.python-list@python.org>
Message-ID: <13egu7rmilu2ia4@corp.supernews.com>

On 2007-09-12, Laszlo Nagy <gandalf at shopzeus.com> wrote:

> I want py2exe not to create library.zip.

setup (
       [...]
       options = {"py2exe": {"skip_archive":1}}
      )       

-- 
Grant Edwards                   grante             Yow! Am I accompanied by a
                                  at               PARENT or GUARDIAN?
                               visi.com            


From steve at holdenweb.com  Tue Sep 11 19:55:30 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 11 Sep 2007 19:55:30 -0400
Subject: common/static code
In-Reply-To: <ed5105470709111537g21f3f356r827f3a0994989dfb@mail.gmail.com>
References: <ed5105470709111537g21f3f356r827f3a0994989dfb@mail.gmail.com>
Message-ID: <46E72AF2.1090908@holdenweb.com>

brien colwell wrote:
> hey all,
> 
> I have a slew of functions that are shared across several scripts. 
> What's the best way to factor them out into a single location?
> 
> many thanks
> 

Define the functions in a module (e.g. myModule.py) then import them as

from myModule inport fun1, fun2, fun3

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------


From gibo at gentlemail.com  Fri Sep  7 09:06:57 2007
From: gibo at gentlemail.com (GiBo)
Date: Sat, 08 Sep 2007 01:06:57 +1200
Subject: Best practice prompting for password
Message-ID: <46E14CF1.8090706@gentlemail.com>

Hi,

what's the best practice to securely prompt user for password on console
in Python? IIRC some programs like SSH do a lot to ensure that the input
comes from TTY and is not redirected from somewhere and several other
checks. In the case of OpenSSH even the password prompt is always
displayed regardless if the output is redirected to a file or not.

Any pointers to best practice or code snippet of python password prompt?

Thanks

Gibo


From raychorn at hotmail.com  Thu Sep 20 19:13:14 2007
From: raychorn at hotmail.com (Python Maniac)
Date: Thu, 20 Sep 2007 16:13:14 -0700
Subject: I could use some help making this Python code run faster using
	only Python code.
In-Reply-To: <mailman.838.1190329042.2658.python-list@python.org>
References: <1190325588.608625.259800@q3g2000prf.googlegroups.com>
	<mailman.838.1190329042.2658.python-list@python.org>
Message-ID: <1190329994.504531.235220@i38g2000prf.googlegroups.com>

On Sep 20, 3:57 pm, "Matt McCredie" <mccre... at gmail.com> wrote:
> On 9/20/07, Python Maniac <raych... at hotmail.com> wrote:
>
> > I am new to Python however I would like some feedback from those who
> > know more about Python than I do at this time.
>
> Well, you could save some time by not applying the scramble one line
> at a time (that is if you don't mind losing the line endings in the
> scrambled version). For that to be effective though, you probably want
> to open in binary mode. Also, your scramble can be written using list
> comprehension.
>
> [code]
> def scramble(s, key=0x80):
>    return ''.join([chr(ord(c) ^ key) for c in s])
>
> output = scramble(f.read())
> [/code]
>
> If you use xor (^) as above, you can use the same method for scramble
> as descramble (running it again with the same key will descramble) and
> you can use an arbitrary key. Though, with 255 combinations, it isn't
> very strong encryption.
>
> If you want stronger encryption you can use the following AESish algorithm:
>
> [code]
> import random
> def scramble(s, key):
>     random.seed(key)
>     return ''.join([chr(ord(c) ^ random.randint(0,255)) for c in s])
> [/code]
>
> This allows you to use much larger keys, but with a similar effect.
> Still not strong enough to be unbreakable, but much better than the
> origional. It is strong enough that someone knowing how you scrambled
> it will have trouble unscrambling it even if they don't know the key.
>
> Matt

So far I like what was said in this reply however my ultimate goal is
to allow the scramble method to be more than what is shown above.

I considered using XOR however XOR only works for the case shown above
where the scramble method simply sets or removes the MSB.

What I want to be able to do is set or reset the MSB in addition to
performing a series of additional steps without negatively impacting
performance for the later cases when the MSB is not the only technique
being employed.

Hopefully this sheds more light on the goal I have in mind.

BTW - My original code is able to scramble a 20 MB file in roughly 40
secs using a Dell E6600 2.4 GHz.  When I began writing the code for
this problem my best runtime was about 65 secs so I know I was heading
in the right direction.

I was about to begin the process of using the D Language and pyd to
gain better performance but then I thought I might also take this
opportunity to learn something about Python before delving into D.
Obviously I could simply code the whole process using D but that
defeats the purpose for using Python in the first place and so I would
tend to limit my low-level coding to the task of scrammbling each line
of text.

The ironic thing about this exorcise was the fact that the
optimization techniques that worked for Python caused the Ruby version
I coded to decrease performance.  It seems Ruby has some definite
ideas about what it feels is optimal that it ain't got much to do with
what I would consider to be traditional optimization techniques where
Ruby is concerned.  For instance, Ruby felt the putc method was less
optimal than the write method which makes no sense to me but that's
life with Ruby.



From mridula.ccpl at gmail.com  Sat Sep 22 03:24:06 2007
From: mridula.ccpl at gmail.com (Mridula Ramesh)
Date: Sat, 22 Sep 2007 12:54:06 +0530
Subject: calling the function of one class from another class
Message-ID: <33dffc910709220024l74b14267v93564df10f5af9a6@mail.gmail.com>

hi.

i currently have code structured like this:

classA():
>     def __init__():
>      ..............
>      ..............
>
>     def fnc1():
>     ....................
>     ....................
>
>
> classB():
>    def __init__():
>     ........................
>     ........................
>     classA.fnc1()    #this is where i get an error
>

TypeError: unbound method fnc1() must be called with classA instance as
first argument (got nothing instead)

when i do  fnc1(classA) i get:

NameError: global name 'fnc1' is not defined

am i violating some programming rule by trying to call fnc1 in classB? i am
only now learning OO alongside python, so i'm not sure! also, can someone
please tell me where to go for more articles on the classes and functions
and calling them from other places?

thanks a lot!

mridula.
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From steve at holdenweb.com  Tue Sep 11 10:44:10 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 11 Sep 2007 10:44:10 -0400
Subject: newbie: stani's python editor if-else
In-Reply-To: <588D53831C701746A2DF46E365C018CE01D2CB3A@LITEXETSP001.etrsouth.corp.entergy.com>
References: <1189517164.302630.307850@w3g2000hsg.googlegroups.com>
	<588D53831C701746A2DF46E365C018CE01D2CB3A@LITEXETSP001.etrsouth.corp.entergy.com>
Message-ID: <fc69jo$8fu$1@sea.gmane.org>

Hamilton, William wrote:
>> -----Original Message-----
>> From: python-list-bounces+whamil1=entergy.com at python.org
> [mailto:python-
>> list-bounces+whamil1=entergy.com at python.org] On Behalf Of
>> kyosohma at gmail.com
>> Sent: Tuesday, September 11, 2007 8:26 AM
>> To: python-list at python.org
>> Subject: Re: newbie: stani's python editor if-else
>>
>> On Sep 10, 11:24 pm, madzientist <madzient... at gmail.com> wrote:
>>> hi,
>>>
>>> two quick questions:
>>>
>>> a) i am using SPE (latest version) and for some reason, when i type,
>>> say
>>>
>>> if 1==2:
>>>     print "not equal"
>>>     else:
>>>           print "equal"
>>>
>>> the else is at the same indentation level as the preceding print
>>> statement, and i get a syntax error
>>>
>>> why doesn't spe automatically put the else at the level of the if
>>> statement ? what am i dong wrong ? once i manually change the
>>> indentation, the code snippet runs perfectly.
>>>
>>> b) if this is not the group for such elementary questions, please do
>>> let me know.
>>>
>>> thanks !!!!
>>>
>>> suresh
>> I agree with Steve. I have yet to see an IDE for Python (or anything
>> else) that unindents statements. Even IDLE, the Official IDE for
>> Python, doesn't do that.
>>
> 
> IDLE (At least, IDLE 1.0.5) unindents in obvious situations.  I think
> it's only on break, continue, pass, and return statements, but there may
> be others.
> 
Wing and Scite also do that, but Emacs seems to have the nicest behavior.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From claird at lairds.us  Thu Sep 13 16:20:26 2007
From: claird at lairds.us (Cameron Laird)
Date: Thu, 13 Sep 2007 20:20:26 +0000
Subject: automatic parallelization
References: <KYidna_Q5d86FnTbnZ2dnUVZ_sSlnZ2d@speakeasy.net>
	<46E99488.20909@uni-oldenburg.de>
Message-ID: <alior4-0pu.ln1@lairds.us>

In article <46E99488.20909 at uni-oldenburg.de>,
Michael Schlenker  <schlenk at uni-oldenburg.de> wrote:
>Mikhail Teterin schrieb:
>> While C/C++ and Fortran have OpenMP (http://www.OpenMP.org/), there is
>> nothing comparable in Tcl (nor, as far as I know, in the two other
>> scripting languages).
>> 
>> Or is there? I'd like to, for example, have a version of foreach loop, that
>> would split the tasks between concurrently executing threads in order to
>> scale to the number of available CPUs:
>
>For CPython you don't get any benefit from extra CPUs even if you tried
>(unless the code inside your loop is specially written C code), due to
>the GIL.
>
>For Perl i don't know, their threading model was a bit heavy last time i
>looked, but i might be off with that, so maybe its doable in Perl.
>
>For Tcl you would at least get the benefit of multiple CPUs, but its
>more message passing based thread model is probably not the best for
>autoparallelization like OpenMP (but you could use the tsv:: api for
>shared vars if you want to).
>
>> 
>> For example:
>> 
>>  pforeach image $images {
>>   set exif($image) [extract_exif $image]
>>  }
>> 
>> The script would be the same on a single- and a multi-CPU computer, but
>> would automatically take advantage of multiple processors, when possible.
>
>Its doable in principle, but as with OpenMP you need extra annotations
>to make it workable.
>
>If you have an event style script in Tcl you might be easier able to use
>threads, as the thread::send -async api fits very well with the event
>based style.
			.
			.
			.
There are a LOT more possibilities one might pursue, depending
on the details of Mr. Teterin's intent.  I'm fond of Linda <URL:
http://www.unixreview.com/documents/s=10125/ur0704l/ >, Parallel
Python <URL: http://www.parallelpython.com/ > only one of several 
initiatives which aspire to exploit multicores, and so on.


From ldo at geek-central.gen.new_zealand  Sat Sep 22 07:58:10 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 22 Sep 2007 23:58:10 +1200
Subject: Writing Object Data to Disk
References: <mailman.3168.1190445604.2656.python-list@python.org>
	<mailman.922.1190461411.2658.python-list@python.org>
Message-ID: <fd300j$ag$1@lust.ihug.co.nz>

In message <mailman.922.1190461411.2658.python-list at python.org>, Amit Kumar
Saha wrote:

>> > From: Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand>
>
>> > In message <mailman.914.1190444082.2658.python-list at python.org>,
>> > Amit Kumar Saha wrote:
>> > 
>> > > I would like to know if "Pickling" the class object is the only
>> > way of writing it to disk for persistent storage.
>> > 
>> > Also tying your external data representation to your
>> > internal program structure (objects) makes it harder to change the
>> > program in future.
> 
> Actually, language independence is really not a consideration here. I am
> happy at having it tied to Python :-)

Even so, ignoring the issue of future changes is folly.


From gagsl-py2 at yahoo.com.ar  Tue Sep 18 10:37:23 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 18 Sep 2007 11:37:23 -0300
Subject: Memory Problem
References: <mailman.710.1190118615.2658.python-list@python.org>
	<5la11gF71rf0U2@mid.uni-berlin.de>
	<200709181558.43026.cscheit@lstm.uni-erlangen.de>
Message-ID: <op.tyutklkdx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Tue, 18 Sep 2007 10:58:42 -0300, Christoph Scheit  
<cscheit at lstm.uni-erlangen.de> escribi?:

> I have to deal with several millions of data, actually I'm trying an  
> example
> with
> 360 grid points and 10000 time steps, i.e. 3 600 000 entries (and each  
> row
> consits of 4 int and one float)
> Of course, the more keys the bigger is the dictionary, but is there a  
> way to
> evaluate the actual size of the dictionary?

Yes, but probably you should not worry about it, just a few bytes per  
entry.
Why don't you use an actual database? sqlite is fast, lightweight, and  
comes with Python 2.5

>> >  # add row i and increment number of rows
>> >  self.rows.append(DBRow(self, self.nRows))
>> >  self.nRows += 1

This looks suspicious, and may indicate that your structure contains  
cycles, and Python cannot always recall memory from those cycles, and you  
end using much more memory than needed.

-- 
Gabriel Genellina



From ladynikon at gmail.com  Fri Sep 14 17:12:12 2007
From: ladynikon at gmail.com (Danyelle Gragsone)
Date: Fri, 14 Sep 2007 17:12:12 -0400
Subject: Just bought Python in a Nutshell
In-Reply-To: <eb79828c0709141312v588ef074w25c2200c37951098@mail.gmail.com>
References: <eb79828c0709132112o5a3e7137n5ae5cd55e3e0b839@mail.gmail.com>
	<mailman.520.1189748935.2658.python-list@python.org>
	<1189784843.896396.108960@g4g2000hsf.googlegroups.com>
	<eb79828c0709141312v588ef074w25c2200c37951098@mail.gmail.com>
Message-ID: <59f9c5160709141412q1098a4cbi989b6eed2f2cc899@mail.gmail.com>

Luckily that site still had one left .. so i brought it :D.  I can
always use another good and CHEAP book.

Danyelle


From apardon at forel.vub.ac.be  Fri Sep 14 05:49:18 2007
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 14 Sep 2007 09:49:18 GMT
Subject: An ordered dictionary for the Python library?
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<7xzlzrtrjn.fsf@ruckus.brouhaha.com>
	<1189664832.876539.86800@k79g2000hse.googlegroups.com>
	<7xps0mmig9.fsf@ruckus.brouhaha.com>
	<1189733708.659317.83950@y42g2000hsy.googlegroups.com>
	<1189753968.917636.310120@19g2000hsx.googlegroups.com>
Message-ID: <slrnfekm8t.spv.apardon@rcpc42.vub.ac.be>

On 2007-09-14, Mark Summerfield <m.n.summerfield at googlemail.com> wrote:
> On 14 Sep, 02:35, J?rgen Urner <jUr... at arcor.de> wrote:
>> Puh, what a discussion... most common use case I can think of is
>>
>> >> d = {'a': 1, 'b': 2, 'c': 3}
>> >> for key in d:
>> >>     # do something that relies on order of keys as specified in the constructor
>>
>> It's a bit tireing having to type
>>
>> >> for key in sorted(d.keys()):
>> >>     do_somethig_with(d[key])
>>
>> instead of a trustfully
>>
>> >> for value in d.values():
>> >>     do_somethig_with(value)
>>
>> As far as I can see much cleaner. No black magic needed ++ sort the
>> dict
>> to another order and rely on the sort order being stable would be a
>> really
>> a nice thing to have.
>>
>> My 2 cents,  J?rgen
>
> What I envisage is:
>
> d = ordereddict(a=1, x=20, b=35, m=4)
> # some time later
> d["e"] = 15
> # later still
> d["b"] = 70
> d.keys() # returns ['a', 'b', 'e', 'm', 'x']
> d.values() # returns [1, 70, 15, 4, 20]
>

which seems to be exactly what my avltree module mentioned earlier
provides.

>>> from avltree import Tree
>>> d=Tree(a=1, x=20, b=35, m=4)
>>> d["e"] = 15
>>> d["b"] = 70
>>> d.keys()
['a', 'b', 'e', 'm', 'x']
>>> d.values()
[1, 70, 15, 4, 20]

-- 
Antoon Pardon


From jstroud at mbi.ucla.edu  Mon Sep 17 21:51:49 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 17 Sep 2007 18:51:49 -0700
Subject: Try this
In-Reply-To: <mailman.631.1189985407.2658.python-list@python.org>
References: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>	<13eqsdfsfvsa16f@corp.supernews.com>	<1189969529.652871.19280@50g2000hsm.googlegroups.com>	<mailman.621.1189970593.2658.python-list@python.org>	<1189979679.969074.216490@y42g2000hsy.googlegroups.com>	<1189981681.745195.18130@y42g2000hsy.googlegroups.com>	<1189983233.709832.124290@19g2000hsx.googlegroups.com>
	<mailman.631.1189985407.2658.python-list@python.org>
Message-ID: <fcnatd$el$2@daisy.noc.ucla.edu>

Steve Holden wrote:
 > mensanator at aol.com wrote:
 >> Makes you wonder what other edge cases aren't
 >> handled properly.
 >>
 >> Makes you wonder why Microsoft doesn't employ
 >> professional programmers.
 >>
 > Makes *me* wonder why you haven't got better things to do with your time.

Contributing to this thread is only slightly worse than just reading it 
in terms of wasting one's...

Just a moment, I'm having an epiphany!


From steve at holdenweb.com  Thu Sep  6 14:47:36 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 06 Sep 2007 11:47:36 -0700
Subject: Help setting default class attributes
In-Reply-To: <1189101393.484939.216840@g4g2000hsf.googlegroups.com>
References: <1189099594.432512.278950@22g2000hsm.googlegroups.com>
	<1189101393.484939.216840@g4g2000hsf.googlegroups.com>
Message-ID: <fbpi09$vu5$1@sea.gmane.org>

attn.steven.kuo at gmail.com wrote:
> On Sep 6, 10:26 am, rh0dium <steven.kl... at gmail.com> wrote:
>> Hi all,
>>
>> I have the following piece of code and I wanted to set the default
>> attributes based on a dictionary. What I am looking for is a way to
>> take PIPODEFAULTS and assign each one as an attribute for the class
>> pipo.  Can someone show me how to do this by iterating over the
>> PIPODEFAULTS and assign them.  What I would expect to be able to do is
>> call the class and modify them.
>>
>> example:
>> a = pipo()
>> print a.caseSensitivity
>> "preserve"
>>
>> a.caseSensitivity = "lower"
>> print a.caseSensitivity
>> "lower"
>>
> 
> 
> I infer from your example that you want
> to set default attributes for *instances of* class pipo
> (not for class pipo itself).
> 
> Use setattr:
> 
> class pipo(object):
>     PIPODEFAULTS = {'caseSensitivity':'preserve',
>         'cellMapTable':'checkPolygon', # etc
>     }
>     def __init__(self, *args, **kwargs):
>         for attr, value in pipo.PIPODEFAULTS.iteritems():
>             setattr(self, attr, value)
> 
> a = pipo()
> b = pipo()
> print a.caseSensitivity
> a.caseSensitivity = 'lower'
> print a.caseSensitivity
> print b.caseSensitivity
> 
> --
> Hope this helps,
> Steven
> 
> 
This is actually way over-complicated. Remembering that the MRO will 
look in the class to resolve the name of an attribute it doesn't find in 
the instance you can simply use the class as a repository for the defaults:

 >>> class pipo(object):
...     caseSensitivity = 'preserve'
...     cellMapTable = 'checkPolygon'
...     # ...
...
 >>> p1 = pipo()
 >>> p2 = pipo()
 >>> p1.caseSensitivity
'preserve'
 >>> p2.caseSensitivity = "lower"
 >>> p1.caseSensitivity
'preserve'
 >>> p2.caseSensitivity
'lower'
 >>>

You could extend the class to allow per-instance defaults to be set in 
the __init__() method too (untested):

class pipo(object):
     caseSensitivity = "preserve"
     cellMapTable = 'checkPolygon'
     def __init__(self, ..., **kw):
         self.__dict__.update(kw)

p1 = pipo(caseSensitivity='lower')

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From m.n.summerfield at googlemail.com  Wed Sep 12 13:07:13 2007
From: m.n.summerfield at googlemail.com (Mark Summerfield)
Date: Wed, 12 Sep 2007 17:07:13 -0000
Subject: An ordered dictionary for the Python library?
In-Reply-To: <1189605843.866907.117370@w3g2000hsg.googlegroups.com>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<13efnmi4n959a59@corp.supernews.com>
	<1189601205.503841.327170@o80g2000hse.googlegroups.com>
	<1189605250.186948.303130@50g2000hsm.googlegroups.com>
	<1189605843.866907.117370@w3g2000hsg.googlegroups.com>
Message-ID: <1189616833.231659.323740@50g2000hsm.googlegroups.com>

On 12 Sep, 15:04, Michele Simionato <michele.simion... at gmail.com>
wrote:
> On Sep 12, 3:54 pm, Mark Summerfield <m.n.summerfi... at googlemail.com>
> wrote:
>
>
>
> > On 12 Sep, 13:46, Michele Simionato <michele.simion... at gmail.com>
>
> > Actually I meant by key order, so insertion order doesn't matter at
> > all. If you need a dictionary-like data structure that respects
> > insertion order you could use a list of (key, value) tuples.
>
> > Another respondent asked about use cases.
>
> > I have found time and again that I needed (key, value) pairs where the
> > key is some string that provides a representation for human readers
> > and the value is some internal key (e.g., database ID) that the system
> > uses internally. In these cases I often need to present the user with
> > a list of items from which to choose and want to present them in
> > sorted order. Naturally, I could use an ordinary dict and then do
> > this:
>
> > for string in sorted(d.keys()):
> >     process(string)
>
> > But what happens when I need to do this a *lot* and when the number of
> > items is hundreds or a few thousands? I'm having to sort again and
> > again, since it is often the case that the items in the list changes
> > during the runtime of the application. So my solution in C++ is to use
> > an ordered dictionary (a map in C++ jargon), which in Python means I
> > can simply write:
>
> > for string in od.keys():
> >     process(string)
>
> For your use case I would wrap a list [(key, value)] with a dict-like
> object and I would use the bisect module in the standard library to
> keep
> the inner list ordered.
>
>  M.S.

Actually, in my own ordereddict I wrap a dict and keep the keys in
order using the bisect module.
This works fine, but I imagine that a C-based implementation based on
B*trees or skiplists would be a lot faster.

In response to some of the following emails, I note one responder says
such a class is trivial to implement. Yes, and so presumably is
defaultdict, but the latter is in the standard library. One of the
"problems" of Python is that the range of skills of its users varies
from casual "amateur" programmers to guru professionals and everywhere
inbetween. Sure at somewhere on that continuum implementing *anything*
is "trivial", but for some users it is worthwhile to have it out of
the box.

What I like about ordered dictionaries is the ability to have sorted
data without sorting. It lets me have multiple sort orders. For
example, in some programs I give the user the choice of how they want
their data ordered and can provide such orderings without sorting,
simply by maintaining a set of parallel data structures with keys
being ordered and values being pointers (object references in Python)
to the relevant values. This costs in memory (but not much since no
values are duplicated and the values are usually large the keys
usually small).

Psuedocode example:

class Person:
    def __init__(self, name, payrollno, grade, dept):
        self.name = name
        # etc

For each person created:
    personFromName["%s\t%012d" % (person.name.lower(),
person.payrollno)] = person
    personFromPayrollNo[person.payrollno] = person
    personFromGrade["%s\t%012d" % (person.grade, person.payrollno)] =
person
    personFromDept["%s\t%012d" % (person.dept, person.payrollno)] =
person

So now I have four orderings with no sorting. (I have to disambiguate
to avoid duplicates and to provide subordering.)

If I have 10,000 people I would potentially have to resort 10,000
instances whenever the user chose a new sort order: this way I just
have to iterate over the right ordered dictionary.

So I do feel that there are good use cases, and I think that for some
Python users having this in the library would be a genuine benefit.

Most of the use cases I envisage involve lots of insertions at start
up, relatively few during runtime, and lots of iterations over the
data as the user changes their view of it.

Of course Python does have an ordered dictionary, it is just not
necessarily always installed. You can use the bsdbd3 module's btopen()
method and pass None as filename to get an in-memory Btree, but I
believe (not sure) that there may be length limits on the keys.



From zzbbaadd at aol.com  Thu Sep 13 12:26:15 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Thu, 13 Sep 2007 09:26:15 -0700
Subject: Python 3K or Python 2.9?
In-Reply-To: <1i4dddf.piaojwz9lz40N%aleax@mac.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<87sl5j5r34.fsf@benfinney.id.au>
	<1189646281.569796.267940@d55g2000hsg.googlegroups.com>
	<87ir6f5mrq.fsf@benfinney.id.au>
	<1189651204.408268.57580@19g2000hsx.googlegroups.com>
	<1i4dddf.piaojwz9lz40N%aleax@mac.com>
Message-ID: <1189700775.661780.292150@50g2000hsm.googlegroups.com>

Well I'm with Bruce Eckel - there shouldn't be any argument for the
object in the class method parameter list. But since Python 3 was
"code-named" 3000 (implying but not delivering big changes... I don't
think it required big changes) and since it still has an explicit
object parameter it's a given that it's not gonna happen in any
revisions.

Bruce said that no other mainstream OO language is explicitly passing
the object as a parameter to class methods. But Perl does it as well.
I think the label "mainstream OO language" is as valid being applied
to Perl as it is to Python.

What I would like to have seen added to class definitions was the
forced declaration of all object variables in the class outside of
methods. I don't like the fact that they have to be, and can be
created in any method on the fly.



From bignose+hates-spam at benfinney.id.au  Sat Sep  1 03:23:04 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 01 Sep 2007 17:23:04 +1000
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<1188497498.3468.60.camel@dot.uniqsys.com>
	<mailman.188.1188546300.28954.python-list@python.org>
	<0v2dnaYWyv4HWkrbnZ2dnUVZ_oTinZ2d@speakeasy.net>
	<1188551958.728836.137370@x35g2000prf.googlegroups.com>
	<fOadnfwlCJbQfErbnZ2dnUVZ_jCdnZ2d@speakeasy.net>
	<6ftgd35rd1g4mddqg2f44d7svd4r85ev17@4ax.com>
	<13dhvs3p5drsd99@corp.supernews.com>
Message-ID: <87ejhic0iv.fsf@benfinney.id.au>

Dennis Lee Bieber <wlfraed at ix.netcom.com> writes:

> I suppose you also add an extra "i" to aluminum <G>

We're not out to rewrite the table of elements. There's no such thing
as "aluminum", and "aluminium" always has just the two "i"s.

-- 
 \          "Rightful liberty is unobstructed action, according to our |
  `\        will, within limits drawn around us by the equal rights of |
_o__)                                    others."  -- Thomas Jefferson |
Ben Finney


From stdazi at gmail.com  Sat Sep 29 15:32:12 2007
From: stdazi at gmail.com (stdazi)
Date: Sat, 29 Sep 2007 19:32:12 -0000
Subject: Program inefficiency?
In-Reply-To: <mailman.1282.1191082697.2658.python-list@python.org>
References: <NYOBGCEXSMTP22SiTqg00150043@NYOBGCEXSMTP22.uswin.ad.vzwcorp.com>
	<mailman.1282.1191082697.2658.python-list@python.org>
Message-ID: <1191094332.393736.231390@w3g2000hsg.googlegroups.com>

On Sep 29, 6:07 pm, Michael.Coll-Ba... at VerizonWireless.com wrote:

> You did not mention the OS, but because you are using
> "pathname\editfile.txt", it sounds like you are using an MS OS.  From
> past experience with various MS OSes, I found that as the number of
> files in a directory increases the slower your process runs for each
> file.  

how so?



From bj_666 at gmx.net  Fri Sep  7 16:15:48 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 7 Sep 2007 20:15:48 GMT
Subject: How to determine the bool between the strings and ints?
References: <mailman.227.1189179649.2658.python-list@python.org>
	<1189182688.290480.102350@o80g2000hse.googlegroups.com>
	<mailman.232.1189183755.2658.python-list@python.org>
	<5kdjmcF31i6hU7@mid.uni-berlin.de>
	<1189193206.466633.148610@r34g2000hsd.googlegroups.com>
Message-ID: <5kdprjF31i6hU8@mid.uni-berlin.de>

On Fri, 07 Sep 2007 12:26:46 -0700, Zentrader wrote:

> Looks like a "feature" of isinstance() is to consider both True and 1 as
> booleans, but type() distinguishes between the two.

That's not a "feature", it is just OOP.  `bool` is a subclass of `int`
therefore every `bool` instance is also an instance of `int`.  There's
nothing special about it.

In [57]: issubclass(bool, int)
Out[57]: True

In [58]: bool.__base__
Out[58]: <type 'int'>

Ciao,
	Marc 'BlackJack' Rintsch


From arragon at NOSPAMlineone.net  Wed Sep  5 11:18:11 2007
From: arragon at NOSPAMlineone.net (David Ross)
Date: Wed, 05 Sep 2007 16:18:11 +0100
Subject: ZSI sample and issues with the WSDL
Message-ID: <ejhtd3pnqf5i1e21ta36l100304ml1ot7l@4ax.com>

First two appologies, this is probably not a Python question, more
SOAP. And second, there is every possibilty I am terminally confused
having looked at this for two days now.

What I want is to create a Python SOAP server.  I am using the sample
which comes with ZSI, namely the Echo.wsdl and associated files.  I
then follow the instructions in the readme, and I CAN get a python
client and server to communicate.

But when I take the WSDL file and try to create a VB.NET program:

>wsdl.exe /language:VB /out:myProxyClass.vb Echo.wsdl 

I get:

Error: Unable to import binding 'EchoServer' from namespace
'urn:ZSI:examples'.
  - Unable to import operation 'Echo'.
  - Specified cast is not valid.

So I tried to set up the wsdl to point to my domain:


<?xml version="1.0" encoding="UTF-8"?>
<definitions 
  xmlns="http://schemas.xmlsoap.org/wsdl/"
  xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"
  xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/"
  xmlns:http="http://schemas.xmlsoap.org/wsdl/http/"
  xmlns:xsd="http://www.w3.org/2001/XMLSchema"
  xmlns:tns="http://www.me.org/Namespaces"
  targetNamespace="http://www.me.org/Namespaces" >

  <message name="EchoRequest">
    <part name="in_str" type="xsd:string"/>
  </message>
  <message name="EchoResponse">
    <part name="result" type="xsd:string"/>
  </message>

  <portType name="EchoServer">
    <operation name="Echo">
      <input message="tns:EchoRequest"/>
      <output message="tns:EchoResponse"/>
    </operation>
  </portType>

  <binding name="EchoServer" type="tns:EchoServer">
    <soap:binding style="document" 
                  transport="http://schemas.xmlsoap.org/soap/http"/>
    <operation name="Echo">
      <soap:operation soapAction="Echo"/>
        <input>
          <soap:body use="literal"/> 
        </input>
        <output>
          <soap:body use="literal"/> 
        </output>
    </operation>
  </binding>

  <service name="EchoServer">
    <port name="EchoServer" binding="tns:EchoServer">
      <soap:address location="http://localhost:7000"/>
    </port>
  </service>

</definitions>


I get a the same error:

Error: Unable to import binding 'EchoServer' from namespace
'http://www.me.org/Namespaces'.
  - Unable to import operation 'Echo'.
  - Specified cast is not valid.

My problem is that I'm not sure how to edit the ZSI example.  Worse,
this is pretty much as simple as it seems to get ;-(

Any pointers would be greatfully received.

I know I should ask in the MS forumns, but I was hoping someone would
understand the ZSI example better than I seem to.

Cheers

David

----
Note anti-spam in email address...


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Sep 17 11:41:47 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 17 Sep 2007 17:41:47 +0200
Subject: Use GUI for Python
References: <1190043073.093736.272750@k79g2000hse.googlegroups.com>
Message-ID: <5l7lhrF69pc5U1@mid.individual.net>

 koutoo at hotmail.com wrote:
> I am new to python as I have been a VB programmer.  I am used to
> the GUI interface, and was wondering if I had to choose between a
> GUI for Python, which one should I go with?

Simple: The one you like most. Since this is an FAQ, I'll just list
some popular GUI toolkits for Python:

- TKinter (included)
- wxPython
- PyQt

If you search the archives you'll find several discussions involving
these and others.

Regards,


Bj?rn

-- 
BOFH excuse #130:

new management



From tundra at tundraware.com  Sat Sep  1 22:22:18 2007
From: tundra at tundraware.com (Tim Daneliuk)
Date: Sat, 01 Sep 2007 21:22:18 -0500
Subject: So what exactly is a complex number?
In-Reply-To: <mailman.266.1188644067.28954.python-list@python.org>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>	<mailman.212.1188576194.28954.python-list@python.org>	<451mq4-les.ln1@ozzie.tundraware.com>
	<mailman.266.1188644067.28954.python-list@python.org>
Message-ID: <lbjpq4-eo22.ln1@ozzie.tundraware.com>

Grzegorz S?odkowicz wrote:
> 
>> Here is a simple explanation (and it is not complete by a long shot).
>>
>> A number by itself is called a "scalar".  For example, when I say,
>> "I have 23 apples", the "23" is a scalar that just represents an
>> amount in this case.
>>
>> One of the most common uses for Complex Numbers is in what are
>> called "vectors".  In a vector, you have both an amount and
>> a *direction*.  For example, I can say, "I threw 23 apples in the air
>> at a 45 degree angle".  Complex Numbers let us encode both
>> the magnitude (23) and the direction (45 degrees) as a "number".
>>
>> There are actually two ways to represent Complex Numbers.
>> One is called the "rectangular" form, the other the "polar"
>> form, but both do the same thing - they encode a vector.
>>
>> Complex Numbers show up all over the place in engineering and
>> science problems.  Languages like Python that have Complex Numbers
>> as a first class data type allow you do to *arithmetic* on them
>> (add, subtract, etc.).  This makes Python very useful when solving
>> problems for engineering, science, navigation, and so forth.
>>
>>
>> HTH,
>>   
> You're mixing definition with application. You didn't say a word about 
> what complex numbers are, not a word about the imaginary unit, where 

I was trying to motivate the idea by means of analogy.  This is a
legitimate thing to do.  It helps lead people to a conceptual understanding
long before they understand the minutae.   I am well aware of the
imaginary unit and from whence complex analysis springs.  I just didn't
think that was the best place to start explicating the *concept*.
I find concrete examples that then can lead to theoretical underpinnings
a better way to go than the reverse.

It is so hard to grasp that learning happens in layers, and that each
layer need not be complete or even precise?  Evidently you've either never
taught (or were very bad at it).  You have to motivate concept and interest
before you can get to the precise detail.  For instance, you start with
Newtonian physics, not quantum physics.  The entry level physics classes
ignore things like the the non-linear behavior of springs, or the effects
when you don't actually do things in a vacuum.  By your definition these
lectures would be "wrong" .. but they're not. They are attempting to introduce
a topic painlessly.   And that's what I was doing.

> does it come from, why is it 'imaginary' etc.  Since we're being arses 
> here I'd hazard a guess you were educated in the USA where doing without 
> understanding has been mastered by teachers and students alike. You're 

I was initially educated in Europe where being rude was sometimes encouraged
to mask insecurity with a false sense of self-importance.  I was later educated
in both Canada and the US wherein I learned both they "why" and the how".



-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From wizzardx at gmail.com  Sun Sep  9 11:02:50 2007
From: wizzardx at gmail.com (David)
Date: Sun, 9 Sep 2007 17:02:50 +0200
Subject: Spell-checking Python source code
In-Reply-To: <46E32273.2050304@bigfoot.com>
References: <1189285495.185657.88010@o80g2000hse.googlegroups.com>
	<46E314FD.7030200@bigfoot.com>
	<18c1e6480709081444x69c4d23cx65f7c9b62eda8271@mail.gmail.com>
	<46E32273.2050304@bigfoot.com>
Message-ID: <18c1e6480709090802t654abc98r3c2639c752a9568d@mail.gmail.com>

> tokenize.tokenize(
>     file.readline,
>     processStrings
>     )
>
> How would you go about writing the output to a file? I mean, I would
> like to open the file at main level and pass a handle to the file to
> processStrings to write to it, finally close output file at main level.
> Probably a class with a processString method?

tokenize.tokenize() takes a callable object as it's second arg. So you
can use a class which you construct with the file, and you give it an
appropriate __call__ method.

http://docs.python.org/ref/callable-types.html

Although with a short script a global var may be simpler.


From deets at nospam.web.de  Fri Sep 28 12:49:16 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 28 Sep 2007 18:49:16 +0200
Subject: Python 3.0 migration plans?
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>
	<87641v4j38.fsf@benfinney.id.au>
	<1190949502.875203.57690@w3g2000hsg.googlegroups.com>
	<5m3p1dFbl98pU1@mid.uni-berlin.de>
	<1190968707.799398.232550@19g2000hsx.googlegroups.com>
	<5m4126FbgjabU1@mid.uni-berlin.de>
	<7x3awyu6sy.fsf@ruckus.brouhaha.com>
Message-ID: <5m4pkcFboneqU1@mid.uni-berlin.de>

Paul Rubin wrote:

> "Diez B. Roggisch" <deets at nospam.web.de> writes:
>> All serious languages are turing-complete. So can we put away with this
>> non-sense argument right away, please?
> 
> Actually the so called "total" languages aren't Turing-complete.  I
> think Coq is an example: every Coq function must return a value.  So

<snip/>

Please, Paul. There is no need to hijack every thread to show off your mad
functional and wicked staticly typed programming language skillz. We had
that discussion at a different time, and you very well know that with
serious I didn't mean "can be used to program rockets that don't fall of
the earth", but that aren't toy-languages used to solve real-world
problems.

Diez


From bignose+hates-spam at benfinney.id.au  Wed Sep 19 22:52:30 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 20 Sep 2007 12:52:30 +1000
Subject: cmsg cancel <87r6kuw0dw.fsf@benfinney.id.au>
Message-ID: <87d4wevyj5.fsf@benfinney.id.au>

I am canceling my own article.


From sjmachin at lexicon.net  Sat Sep 22 02:51:00 2007
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 22 Sep 2007 16:51:00 +1000
Subject: Getting rid of bitwise operators in Python 3?
In-Reply-To: <46f49740$0$32514$4c368faf@roadrunner.com>
References: <46f49740$0$32514$4c368faf@roadrunner.com>
Message-ID: <46f4bb56@news.eftel.com.au>

On 22/09/2007 1:44 PM, Carl Banks wrote:
> Anyone with me here?  (I know the deadline for P3 PEPs has passed; this 
> is just talk.)
> 
> Not many people are bit-fiddling these days.  One of the main uses of bit 
> fields is flags, but that's not often done in Python because of keyword 
> arguments and dicts, which are lot more versatile.  Another major use, 
> talking to hardware, is not something oft done in Python either.

You need to get out more often :-)

Python's bitwise operators are useful for and *used* for:

(1) packing and unpacking arcane structs used in communication protocols 
and in proprietary file formats

(2) trial implementations of pseudocode from academic papers, before 
transliterating to pyrex or C

E.g. main loop for a bit-parallel O(N) algorithm for a Levenshtein distance:
       for c in t:
          pm_new = pm[ord(c)]
          d0 = (((pm_new & vp) + vp) ^ vp) | pm_new | vn
          hp = vn | ~(d0 | vp)
          hn = d0 & vp
          if hp & mask:
             x += 1
          if hn & mask:
             x -= 1
          hp = (hp << 1) | 1
          vp = (hn << 1) | ~(d0 | hp)
          vn = d0 & hp
       return x

> 
> It seems like this occasional usage wouldn't justify having built-in 
> operators on its own.  And with the int/long unification, it makes a bit 
> less sense to think of integers as a bit field.

"to think of integers as a bit field" makes no sense to me. Possibly you 
meant "to think of an integer as a collection of bit fields" -- but this 
is putting the cart before the horse. Simply: if the data is a 
collection of bit fields, and the data is held in an int or a long or 
the unification thereof, then you need bitwise operators to extract/pack 
the bit fields.


>  Python has these 
> operators because of its heritage, but Python continues to move away from 
> the bad habits of its ancestors (integer division and so on), and I 
> wonder if this isn't another one.
> 
> Of course I'm not suggesting to get rid of bitwise operations altogether; 
> just make them builtin functions: "x & 1" becomes "bitwise_and(x,1)" and 
> so on.

Function call overhead?? No thanks. E.g. from real working code:

                 r = Rowinfo()
                 # Using upkbits() is far too slow on a file
                 # with 30 sheets each with 10K rows :-(
                 #    upkbits(r, bits2, (
                 #        ( 0, 0x00000007, 'outline_level'),
                 #        ( 4, 0x00000010, 'outline_group_starts_ends'),
                 #        ( 5, 0x00000020, 'hidden'),
                 #        ( 6, 0x00000040, 'height_mismatch'),
                 #        ( 7, 0x00000080, 'has_default_xf_index'),
                 #        (16, 0x0FFF0000, 'xf_index'),
                 #        (28, 0x10000000, 'additional_space_above'),
                 #        (29, 0x20000000, 'additional_space_below'),
                 #        ))
                 # So:
                 r.outline_level = bits2 & 7
                 r.outline_group_starts_ends = (bits2 >> 4) & 1
                 r.hidden = (bits2 >> 5) & 1
                 r.height_mismatch = (bits2 >> 6) & 1
                 r.has_default_xf_index = (bits2 >> 7) & 1
                 r.xf_index = (bits2 >> 16) & 0xfff
                 r.additional_space_above = (bits2 >> 28) & 1
                 r.additional_space_below = (bits2 >> 29) & 1


> Is it worth it to make such a change?  It would remove a lot of operators 
> (11 by my count), vastly simplifying syntax,  Which, IMHO, is no small 
> thing.  New numerical types would have fewer operations to support.

Specious argument. A new numerical type doesn't have to support bitwise 
operations now, if they make no sense for that type.

> And 
> let's face it: unlike arithmetic opertaions, there's not a lot of 
> different meanings for bit operations. And it would also, um, make new 
> special characters available *cough*.
> 
> Obviously, how widespread their usage is would matter.  But keep in mind 
> it would also be easy to convert the code automatically, because the 
> Python parser could reliably find all bitwise operations reliably.  (The 
> problem would be types that overloaded them to be something other than 
> bitwise operations: I'm looking at you, set.  That could very well be a 
> deal breaker.  I've never approved of things with completely different 
> meanings being deliberately overloaded to have the same spelling; this is 
> one reason why.)

Too late. That instance of Pandora's box had its lid nailed open ab initio.

> 
> If anyone says, "But that takes away an easy test for oddness (x&1)!", 
> or, "But you can multiply powers of two using left shift!  Isn't that 
> cool?", I'm not buying it.  Those are gimmicks.  Arithmetic operations 
> should be done with arithmetic operators.  The bitwise operators make the 
> code much less readable, especially to people unfamiliar with this usage.

Agreed, but this is beside the point. People will write obfuscated code 
  using any and every operator or built-in that you give them.

In case you hadn't guessed by now: -1

Cheers,
John


From david at nospam.spam  Tue Sep 11 21:50:49 2007
From: david at nospam.spam (david)
Date: Wed, 12 Sep 2007 11:50:49 +1000
Subject: cpython list __str__ method for floats
In-Reply-To: <5kndseF4iskqU1@mid.individual.net>
References: <13ectngf3aeqrb0@corp.supernews.com>
	<5kndseF4iskqU1@mid.individual.net>
Message-ID: <13eehfo8nr5eu1d@corp.supernews.com>

Bjoern Schliessmann wrote:
> [david] wrote:
>> returns poorly formatted values:
> 
> Please explain.
> 
>>  >>>str(13.3)
>> '13.3'
>>  >>>str([13.3])
>> '[13.300000000000001]'
> 
> This is quite a FAQ.
> 
> str of a float returns the float, rounded to decimal precision.
> 
> str of a list returns a square brackets enclosed enumeration of the
> contents (using repr on them). repr of a float returns the float in
> full precision.
> 
> Regards,
> 
> 
> Bj?rn
> 

 > contents (using repr on them). repr of a float returns the float in
 > full precision.

But of course it doesn't, as illustrated, which is the whole point.

It returns a string at greater than full precision.

Leaving aside the question of why str should return repr,
13.300000000000001 is not 'the float in full precision':
it is an arbitrary translation of the float.

The idea that 13.3 is a 'rounded' value for the number,
and that 13.300000000000001 is not a 'rounded' value of
the number, is a common error of intuitive mathematics.

I hope that when you say that this is a FAQ, you don't
mean that the community has solidified on this naive
interpretation :~)


[david]




From gagsl-py2 at yahoo.com.ar  Tue Sep  4 19:46:19 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 04 Sep 2007 20:46:19 -0300
Subject: doctest and decorators
References: <2bfa72fa0709041329i14b5b547i2eb85250f7547da@mail.gmail.com>
	<200709042316.08263.python@cx.hu>
	<2bfa72fa0709041452o72d9a98fp939852d061a2cda3@mail.gmail.com>
	<200709050009.46380.python@cx.hu>
	<2bfa72fa0709041529g9d5ac22hce3a55d5357b1a1c@mail.gmail.com>
Message-ID: <op.tx5lnhazx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 04 Sep 2007 19:29:11 -0300, Daniel Larsson  
<daniel.j.larsson at gmail.com> escribi?:

> On 9/5/07, Ferenczi Viktor <python at cx.hu> wrote:
>>
>> > > @functools.wraps(f)
>> > > Pass the function to be wrapped by the decorator to the wraps
>> function.
>> > Ooops, right. That doesn't change the fact that decorated functions  
>> get
>> > hidden from doctest though.
>
>
> I have no issue when the decorator is defined in the same module as the
> decorated function, my problem is running doctests on functions using an
> imported decorator. Having to implement the decorator in every source  
> module
> isn't very practical. Try splitting your module in two, as I did, and run
> with -v, and you'll see the problem.

Looks like a bug. doctest is failing to recognize that the decorated  
function belongs to the module being tested.

A simple patch: In doctest.py, method _from_module, near line 840, you  
have these lines:

         elif inspect.getmodule(object) is not None:
             return module is inspect.getmodule(object)

Move them up, just before the line:

         elif inspect.isfunction(object):

This works fine in this case, but I'm not sure whether this breaks in  
other circumstances (but I can't think of a case when using  
inspect.getmodule() would not be appropiate).

PS: I can't see any tests for decorated functions (except  
@classmethod/@staticmethod) in the library test suite. I'll try to add  
some and submit a patch.

-- 
Gabriel Genellina



From cyril.giraudon at gmail.com  Fri Sep 21 13:54:57 2007
From: cyril.giraudon at gmail.com (cyril giraudon)
Date: Fri, 21 Sep 2007 10:54:57 -0700
Subject: Parameterize formatting string
Message-ID: <1190397297.236691.137220@19g2000hsx.googlegroups.com>

Hello,

I 'd like to know if a std::setw() equivalent function exists in
python ?

i thought of something like :

a = 16
"%ai" % 12

But it is not correct.

Any Idea ?

Thanks a lot,

Cyril.



From gonhidi at gmail.com  Sat Sep  1 05:19:38 2007
From: gonhidi at gmail.com (=?ISO-8859-1?Q?Gonzalo_HIGUERA_D=CDAZ?=)
Date: Sat, 1 Sep 2007 11:19:38 +0200
Subject: Ayuda
In-Reply-To: <008c01c7eb37$0895eb80$0500000a@wf6840f5e6a1e4>
References: <008c01c7eb37$0895eb80$0500000a@wf6840f5e6a1e4>
Message-ID: <411f59bd0709010219t131ec526sb9935ffd1b564494@mail.gmail.com>

2007-08-30, Dr. Jos? Contreras <josehectorcontreras at arnet.com.ar>:
> Gente Inteligente y Distinguida, soy un aficionado y apelo a Ustedes, para
> resolver ?ste problema. Para WebMaster de Google, me solicita instalar o
> ejecuci?n de pit?n, c?mo comprender?n no dispongo de ning?n guru de web, por
> lo que solicito en la medida de sus posibilidades me ayuden a ejecutar pit?n
> para WebMaster, para ingresar a sitemap.xlm. Les saludo con distinguida
> consideraci?n y respeto. Jos?
>
>  Si son tan amables, les agradecer? cualquiera sea la Repuesta, en Espa?ol o
> castellano. Gracias

Entiendo que desea usar la herramienta Google Sitemap Generator para
generar el fichero sitemap.xml.gz. De ser ?ste el caso, en el servidor
donde se alberga el sitio web es necesario lo siguiente:

    1.- Que haya instalada una versi?n adecuada de Python (m?nimo:
2.2; recomendable: 2.3 ? posterior). No es necesario ning?n m?dulo de
integraci?n con el programa que sirve las p?ginas web.

    2.- Tener acceso por l?nea de comandos con permisos suficientes
como para poder ejecutar Python y para ver la estructura de
directorios que define el sitio web a indexar.

Para ambos puntos, quien mejor puede indicarle las posibilidades es el
personal del servicio de hospedaje y/o administradores del servidor
web.

Salud.

-- 
Gonzalo HIGUERA D?AZ <gonhidi at gmail.com>


From dfedoruk at gmail.com  Thu Sep 13 09:05:58 2007
From: dfedoruk at gmail.com (Dmitri Fedoruk)
Date: Thu, 13 Sep 2007 13:05:58 -0000
Subject: lxml + mod_python: cannot unmarshal code objects in restricted
	execution mode
Message-ID: <1189688758.587404.139360@r29g2000hsg.googlegroups.com>

Hello everyone,

I'm developing a mod_python application that is based on XML\XSLT
transforming.

I used 4Suite libraries for that, but as the speed was unacceptable
for me, I switched to lxml. Everything became much easier and 10 times
faster, but I've encountered the subject problem.

In brief - all my data and xslt are stored and transferred in UTF-8.
With 4Suite everything was fine all the time. With lxml it works fine
from the console, but inside mod_python it occasionaly dies, ~ one
time out of three. Strange - the same code with the same data works or
dies by its own means.

As far as I have found, there was a similar problem with PyXML and
encodings module, but there was no clear solution.

So, my configuration is the following:
Python 2.5.1
Server version: Apache/2.2.4 (FreeBSD)
mod_python-3.3.1

And the relevant parts of my code are these:

def extApplyXslt(xslt, data, logger ):
    try:
        strXslt = urllib2.urlopen(xslt).read()
        # i have to read the xslt url to the python string
    except urllib2.HTTPError, e:
       .......
    except urllib2.URLError, e:
       .............
    try:
        xslt_parser = etree.XMLParser()
        xslt_parser.resolvers.add( PrefixResolver("XSLT") )

        # and now I have to use the string; a more elegant solution,
anyone?
        f = StringIO(strXslt)
        xslt_doc = etree.parse(f, xslt_parser)

        # and here where the problem comes
        transform = etree.XSLT(xslt_doc)

    except Exception, exc:
        logger.log(logging.CRITICAL, exc.__str__() )

    try:
      result_tree = transform(data)
      return etree.tostring(result_tree, 'utf-8')
    except Exception, exc:
      print "xslt processing error!", exc.__str__()
      return ""

It dies with the message 'cannot unmarshal code objects in restricted
execution mode'. By profiling I detected the point where problem
occurs:
 transform = etree.XSLT(xslt_doc)

So, I would be grateful for any suggestions how to get rid of this.
I'd really like to use lxml. Maybe I should initialize the xslt
processor in somehow other way?

Thanks in advance,
Dmitri



From xcolwell at gmail.com  Tue Sep 11 18:37:00 2007
From: xcolwell at gmail.com (brien colwell)
Date: Tue, 11 Sep 2007 15:37:00 -0700
Subject: common/static code
Message-ID: <ed5105470709111537g21f3f356r827f3a0994989dfb@mail.gmail.com>

hey all,

I have a slew of functions that are shared across several scripts. What's
the best way to factor them out into a single location?

many thanks
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From taleinat at gmail.com  Wed Sep 12 04:37:49 2007
From: taleinat at gmail.com (Tal Einat)
Date: Wed, 12 Sep 2007 01:37:49 -0700
Subject: Excel process still running after program completion - SOLVED
In-Reply-To: <1189531772.257865.292510@k79g2000hse.googlegroups.com>
References: <1189525558.721174.198370@19g2000hsx.googlegroups.com>
	<mailman.394.1189529975.2658.python-list@python.org>
	<1189531603.894247.218710@r29g2000hsg.googlegroups.com>
	<1189531772.257865.292510@k79g2000hse.googlegroups.com>
Message-ID: <1189586269.487303.234660@50g2000hsm.googlegroups.com>

On Sep 11, 8:29 pm, Chris <chris.ole... at gmail.com> wrote:
> On Sep 11, 1:26 pm, Chris <chris.ole... at gmail.com> wrote:
>
>
>
> > On Sep 11, 12:59 pm, "Hamilton, William " <wham... at entergy.com> wrote:
>
> > > > From: Chris
>
> > > > I have a python script that is driving Excel and using the win32com
> > > > module. However, upon program completion there's still an Excel.exe
> > > > process running in the background that I must terminate through Task
> > > > Manager. Reading up on other threads indicate that maybe I still have
> > > > some Excel objects referenced within my code. Is this why the process
> > > > doesn't terminate?
>
> > > > The related (I hope) parts of my code is here.
>
> > > > x1App = Dispatch("Excel.Application")
> > > > Book1 = x1App.Workbooks.Open(ExcelLogPath+"\\outputLog-template.xls")
> > > > x1App.Visible = 1
> > > > for sheets in Book1.Worksheets:
> > > >              if sheets.Name == file_name:
> > > >                       sheetExists = True
> > > > if sheetExists != True:
> > > >              activeSheet =
> > > > Book1.Worksheets.Add(After=Book1.Worksheets(1))
> > > >              activeSheet.Name = file_name
> > > >              testNum[file_name] = 0
> > > > Book1.Worksheets(file_name).Select()
> > > > Book1.ActiveSheet.Cells(1+(testNum[file_name]*20),1).Value = "Original
> > > > File Name"
> > > > Book1.ActiveSheet.Cells(2+(testNum[file_name]*20),1).Value =
> > > > file_name
> > > > Book1.ActiveSheet.Pictures().Insert(output).Select()
> > > > Book1.SaveAs(Filename=path)
> > > > x1App.ActiveWorkbook.Close(SaveChanges=0)
> > > > x1App.Quit()
> > > > del x1App
> > > > del Book1
> > > > del activeSheet
>
> > > > What am I missing?
>
> > > In my Excel projects, I terminate it with:
>
> > > xlBook.Close()
> > > xlApp.Quit()
>
> > > I haven't had a problem with Excel staying open after the program ends.
>
> > > (On a tangent, I want to find the person who thought it was a good idea
> > > to use the same symbol in a font for 1, l, and I and do some unpleasant
> > > things.)
>
> > > --
> > > -Bill Hamilton
>
> > That doesn't really fix the problem as I'm pretty sure its identical
> > code for
> > x1App.ActiveWorkbook.Close(SaveChanges=0)
>
> > I think where my problem lies is within my for each loop where I
> > search to see if the worksheet with the name already exists
> > for sheets in Book1.Worksheets:
> >      if sheets.Name == file_name:
> >            sheetExists = True
>
> > Since I'm assuming that it creates objects for each of the sheets and
> > I don't delete them...
>
> Which I'm right... I added this code and now there's no EXCEL.EXE
> process after my script completes
>
> for sheets in Book1.Worksheets:
>       if sheets.Name == file_name:
>             sheetExists = True
>       sheets = None
>       del sheets

You just need to 'del sheets' once after the loop, no need to do it in
every iteration. After your original loop the 'sheets' variable still
pointed to the last sheet object, probably causing it not to be
properly cleaned up. This is the only thing that your change fixes,
but it is simpler (and more readable) to just do it once after the
loop.

(Please add SOLVED or FIXED to the subject when your issue has been
resolved, so that people like me don't read the whole thread only to
find that their help is no longer needed.)

- Tal



From zzbbaadd at aol.com  Fri Sep  7 02:09:58 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Thu, 06 Sep 2007 23:09:58 -0700
Subject: startswith( prefix[, start[, end]]) Query
In-Reply-To: <46e00d7e$0$16413$426a74cc@news.free.fr>
References: <1189087752.538726.101350@r29g2000hsg.googlegroups.com>
	<46e00d7e$0$16413$426a74cc@news.free.fr>
Message-ID: <1189145398.081080.59580@r34g2000hsd.googlegroups.com>


> Else, you could as well write your own testing function:
>
> def str_starts_with(astring, *prefixes):
>    startswith = astring.startswith
>    for prefix in prefixes:
>      if startswith(prefix):
>        return true
>    return false
>

What is the reason for
  startswith = astring.startswith
  startswith(prefix)

instead of
  astring.startswith(prefix)



From tuomas.vesterinen at pp.inet.fi  Tue Sep  4 06:34:54 2007
From: tuomas.vesterinen at pp.inet.fi (Tuomas)
Date: Tue, 04 Sep 2007 10:34:54 GMT
Subject: Undeterministic strxfrm?
Message-ID: <ixaDi.63$327.50@read3.inet.fi>

Python 2.4.3 (#3, Jun  4 2006, 09:19:30)
[GCC 4.0.0 20050519 (Red Hat 4.0.0-8)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> import locale
 >>> def key(s):
...     locale.setlocale(locale.LC_COLLATE, 'en_US.utf8')
...     return locale.strxfrm(s.encode('utf8'))
...
 >>> first=key(u'maupassant guy')
 >>> first==key(u'maupassant guy')
False
 >>> first
'\x18\x0c \x1b\x0c\x1e\x1e\x0c\x19\x1f\x12 
$\x01\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x01\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x01\xf5\xb79'
 >>> key(u'maupassant guy')
'\x18\x0c \x1b\x0c\x1e\x1e\x0c\x19\x1f\x12 
$\x01\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x08\x01\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x01\xb5'
 >>>

May be this is enough for a sort order but I need to be able to catch 
equals too. Any hints/explanations?


From metawilm at gmail.com  Tue Sep 25 02:25:45 2007
From: metawilm at gmail.com (metawilm at gmail.com)
Date: Mon, 24 Sep 2007 23:25:45 -0700
Subject: Nested For and While Statements
In-Reply-To: <1190664644.936871.57050@57g2000hsv.googlegroups.com>
References: <1190662087.403000.16290@g4g2000hsf.googlegroups.com>
	<fd94av$fj8$1@daisy.noc.ucla.edu>
	<1190664644.936871.57050@57g2000hsv.googlegroups.com>
Message-ID: <1190701545.148197.191090@o80g2000hse.googlegroups.com>

On Sep 24, 10:10 pm, Zentrader <zentrad... at gmail.com> wrote:
> > Your for loops both use the same counting index.
>
> Since those variables are local to the for loop,

No, "for" loops don't introduce a scope. The one variable named "j" is
shared.

> for j in range( 10 ):
>   print j, "first loop"
>   for j in range( 5 ):
>      print "     ", j, "2nd loop"

The reason it does work as hoped, is that the generators, including
those created by the call to "range", keep internal state to know the
next value to yield. The existence or current value of iteration
variables like "j" is completely irrelevant.

Here, the first the call to "range" creates a generator, and binds j
to the first value yielded, which is 0. Then the second range-
generator is created, iterated over using the same variable. Then the
first generator is asked for its second value (= 1), and j is bound to
that regardless its current value.

- Willem



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Sep 20 11:34:55 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 20 Sep 2007 17:34:55 +0200
Subject: Lookup values from one table to another based on a value
In-Reply-To: <1190298876.689060.44540@d55g2000hsg.googlegroups.com>
References: <1190298876.689060.44540@d55g2000hsg.googlegroups.com>
Message-ID: <46f2930a$0$9505$426a74cc@news.free.fr>

koutoo at hotmail.com a ?crit :
> If I wanted to accomplish looking up values from one table based on a
> value from another table or file, how would I go about doing this in
> Python?  Would I build a dictionary or an array?
> 
> exp:
> 
> Table1:
> 
> Site = 103
> Lane = 2
> Dir = ?  # Get this from Table2
> 
> Table2:
> 
> Site, Lane, Direction,
> 103, 1, 1
> 103, 2, 1
> 103, 3, 5
> 103, 4, 5
> 
> Normally in Access I would just use a Dlookup and be done with it, or
> use a Recordset in VB.  Thanks guys.

What about using a database ? Like SQLite ?

Else, the canonical data structure for quick lookups is of course the dict.


From lew at lewscanon.com  Wed Sep 19 17:52:59 2007
From: lew at lewscanon.com (Lew)
Date: Wed, 19 Sep 2007 17:52:59 -0400
Subject: The meaning of a = b in object oriented languages
In-Reply-To: <pan.2007.09.19.15.31.35@gmail.com>
References: <1190094057.976729.285120@n39g2000hsh.googlegroups.com>	<f517e32aa6ad5d39debdff7b6dc84685@ruby-forum.com>	<1190098656.030658.66380@57g2000hsv.googlegroups.com>	<_4OdnQm5joyO1m3bnZ2dnUVZ_tuonZ2d@comcast.com>
	<pan.2007.09.19.15.31.35@gmail.com>
Message-ID: <TPWdnenbTs-mB2zbnZ2dnUVZ_tSknZ2d@comcast.com>

Lew wrote:
>> Java is a strongly-typed, compiled language which means it does more
>> static type checking and thus would reject treating a as both an array
>> and a String.
>>   In that environment the programmer must choose one or the other.

Ken Bloom wrote:
> In this Java example, a and b are statically typed to be of type Object. 
> Both Strings and Arrays [sic] descend from Object. (And primatives [sic] like 
> integers and the like will be autoboxed into descendants of Object).

That doesn't make Strings and arrays assignment compatible, and besides, it 
isn't so.

It was not stated by the OP that they were statically typing the variable to 
Object.  In fact, their example used a type "Animal".  They also used the 
syntax "a[1]", which is not possible in Java with a variable of type Object. 
So clearly a and b are /not/ statically typed to Object.

Unless you meant "/if/ a and b are statically typed [to] Object" that the 
assignment will work, which is true but of sharply limited usefulness.

In that case, you are a) defeating Java's type system and b) not getting the 
benefit of the Stringness or arrayness of the variable.  This is in contrast 
to the dynamically-typed languages wherein the variable will behave like an 
object of the runtime type, unlike in Java.

Back to the OP's example:
Summercool wrote:
>> so that's why  a[1] = "foobar"  will change what b will display, but 
>> a = "foobar" will not change what b will display.

Again, this cannot be done in Java.  The same variable a cannot be set to a 
String and still be used with array syntax.

-- 
Lew


From brian.e.munroe at gmail.com  Mon Sep  3 11:03:25 2007
From: brian.e.munroe at gmail.com (Brian Munroe)
Date: Mon, 03 Sep 2007 15:03:25 -0000
Subject: Adding attributes stored in a list to a class dynamically.
In-Reply-To: <13do3c36rlqn873@corp.supernews.com>
References: <mailman.297.1188755850.28954.python-list@python.org>
	<1i3t9va.1jkz4om1sajk8pN%aleax@mac.com>
	<1188769303.724140.248630@d55g2000hsg.googlegroups.com>
	<13dmehro14cjp05@corp.supernews.com>
	<1188794274.562413.70140@k79g2000hse.googlegroups.com>
	<13do3c36rlqn873@corp.supernews.com>
Message-ID: <1188831805.550310.295170@g4g2000hsf.googlegroups.com>

On Sep 3, 6:34 am, Steven D'Aprano <st... at REMOVE-THIS-
cybersource.com.au> wrote:

> The underscore versions are for customizing the lookup process, not for
> dynamically looking up names. If your class needs to do something non-
> standard when you write obj.name, you might need to write methods
> __getattr__ etc.
>

I absolutely understand that much.

>
> In a nutshell: getattr() etc. are for looking up attributes dynamically
> when you don't know the name of the attribute until runtime. __getattr__
> etc. are for looking up attributes when you need to compute the value on
> the fly. (But an easier, less troublesome way of doing that
> is with properties.)
>

If I think about this in the context of a property, which in my newbie
mind gives you the ability to 'override' the standard behavior when
getting, setting or I suppose deleting a specific attribute.  I think
I understand what you meant by 'compute the value on the fly', the
keyword being *compute*?

thanks for taking the time to explain this (over and over, heh!)

-- brian



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Sep 24 07:23:03 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 24 Sep 2007 13:23:03 +0200
Subject: sorting a list numbers stored as strings
In-Reply-To: <1190632366.863711.100680@y42g2000hsy.googlegroups.com>
References: <1190632366.863711.100680@y42g2000hsy.googlegroups.com>
Message-ID: <46f79e04$0$30457$426a34cc@news.free.fr>

aine_canby at yahoo.com a ?crit :
> hi,
> 
> I have the following list -
> 
> ["1", "11", "2", "22"]
> 
> how do I sort it like this -
> 
> ["1", "2", "11", "22"]

source = ["1", "11", "2", "22"]
result = [t[1] for t in sorted((int(item), item) for item in source)]
print result



From robin at NOSPAMreportlab.com  Sat Sep 22 10:28:17 2007
From: robin at NOSPAMreportlab.com (Robin Becker)
Date: Sat, 22 Sep 2007 15:28:17 +0100
Subject: Odd files; just left behind?
In-Reply-To: <mailman.879.1190397963.2658.python-list@python.org>
References: <mailman.760.1190205969.2658.python-list@python.org>	<878x725ts7.fsf@pobox.com>	<46F191DF.7000908@jessikat.plus.net>	<46f2bd9b$0$20143$426a74cc@news.free.fr>	<46F38FBC.7090903@chamonix.reportlab.co.uk>
	<mailman.879.1190397963.2658.python-list@python.org>
Message-ID: <46F52681.5090409@jessikat.plus.net>

Robert Kern wrote:
.......
> 
> They're a cache.

they're actually the files that get used by the installed extension in 
this case (MySQLdb).

..........
>>
>> it would seem simpler to have the .so files inside the site-packages and there's 
>> the question of why this folder has to be obfuscated (name starts with .). Even 
>> if these files are "resources" why should they be assumed to belong to the user?
> 
> Because they are unpacked at runtime by the user that imported the module.
> Usually, they won't have write access to site-packages.
> 

in this particular case the python being used was installed with a user 
prefix eg /myhome/PYTHON so everything belongs to the user; extensions 
installed by the same user can surely be installed in those folders. 
Upon checking I find that the same installs which produced the 
~/.python-eggs files also managed to put  the eggs like 
MySQL_python-1.2.2-py2.3-freebsd-6.1-SECURITY-i386.egg inside the 
various site-packages directories.

I see no reason why the binary resources shouldn't be unpacked to 
site-packages at install time.

It seems reasonable that since install time is the only time an egg 
install can reasonably expect to write to the install area then that's 
when these resources should be unpacked. The zipapp install system 
referred to by John Lee does it that way because in practice we find we 
do need to install on CD's etc.

What happens if I as a naive idiot install an egg to a write once file 
system? I suppose the assumption is that we don't mind such files being 
created in the user's space. Spewing stuff all over some else's disk at 
run time instead of doing it once at install is wrong and may not even 
be possible. It also allows for the carefully crafted binary extensions 
to be substituted by anyone with write permission to the cache folder.
-- 
Robin Becker


From http  Thu Sep 20 15:32:52 2007
From: http (Paul Rubin)
Date: 20 Sep 2007 12:32:52 -0700
Subject: An Editor that Skips to the End of a Def
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87odfxjgjy.fsf@pobox.com>
Message-ID: <7x4phpt9nf.fsf@ruckus.brouhaha.com>

jjl at pobox.com (John J. Lee) writes:
> Seriously for a moment, I read something recently (maybe here?) about
> an Apple study that claimed to show that people who perceived keyboard
> bindings as being much faster than mouseing did not, on average, take
> less time to complete the actions that were studied (they took more
> time, in fact).  The plausible explanation for this was that people's
> subjective perception of time is affected by the greater mental work
> involved in typing (as opposed to mousing) for a given action.

I think mousing takes more mental work than typing, and that's why it
subjectively seems slower even if a stopwatch shows it to be faster.

I have IM text chats with my officemate all the time even though he's
sitting about 4 feet away from me and I could easily talk to him and
that would probably be faster.  But text chat needs less mental effort
since it doesn't take my attention away from symbols on the screen,
i.e. when the chat topic is something simple, I don't lose mental
context of the program I'm working on and then have to spend time
getting the context back.  In that sense, text chats save time
compared with regular conversations even though they're slower.  

Of course if the chat subject gets complicated and starts needing
careful thought, then it's better to switch to conversation, and
sometimes we both simultaneously realize that and start talking to
each other or using the whiteboard.


From fabiofz at gmail.com  Mon Sep 10 09:02:42 2007
From: fabiofz at gmail.com (Fabio Zadrozny)
Date: Mon, 10 Sep 2007 10:02:42 -0300
Subject: Setting stdout encoding
In-Reply-To: <1189416350.069995.220250@w3g2000hsg.googlegroups.com>
References: <1189416350.069995.220250@w3g2000hsg.googlegroups.com>
Message-ID: <cfb578b20709100602i4146f5c0hd2a1343f644a90f@mail.gmail.com>

>
>
> Does someone know if there's a way to explicitly set the stdout/stderr/
> stdin
> encoding that python should use?
>
> The encoding can be set using the C API for file objects - from Python
> code, use ctypes:
>
>
Yeap, but that would leave me with the original problem: I need to run a
script to run the original script I want to run...(and not being compatible
with other python implementations). Isn't there any way to set that
externally (like environment variable, args to the interpreter or anything
else like that)?

Thanks,

Fabio
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From steve at REMOVE-THIS-cybersource.com.au  Thu Sep 20 05:25:04 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Thu, 20 Sep 2007 09:25:04 -0000
Subject: Mixin classes and single/multiple inheritance
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au>
	<46f0fba0$0$29605$426a34cc@news.free.fr>
	<1190199134.791808.267110@22g2000hsm.googlegroups.com>
	<mailman.778.1190225664.2658.python-list@python.org>
	<1190256493.827576.139470@r29g2000hsg.googlegroups.com>
	<877immvye0.fsf_-_@benfinney.id.au>
	<1190257864.945639.199230@k79g2000hse.googlegroups.com>
	<87y7f2uhpp.fsf@benfinney.id.au>
	<1190262607.684957.49610@57g2000hsv.googlegroups.com>
	<87myviuee5.fsf@benfinney.id.au>
Message-ID: <13f4f3g682udg28@corp.supernews.com>

On Thu, 20 Sep 2007 14:52:50 +1000, Ben Finney wrote:

> Can you give a code example of how you think mixins should be
> implemented in Python, assuming the absence of multiple inheritance?



I'll take a shot at it... use automatic delegation to the mixin class.



class Parrot(object):
    def fly(self):
        return "The parrot can fly short distances."
    def talk(self):
        return "I'm pining for the fjords."

class Albatross(object):
    def fly(self):
        return "The albatross is known to fly enormous distances."


# Now I want a talking Albatross, without using multiple inheritance.

class TalkingAlbatross(Albatross):
    def __init__(self, *args, **kwargs):
        # avoid triggering __setargs__
        self.__dict__['mixin'] = Parrot()
        # avoid using super() so Ben doesn't get cranky
        self.__class__.__base__.__init__(self, *args, **kwargs)
    def __getattr__(self, name):
        return getattr(self.mixin, name)
    def __hasattr__(self, name):
        return hasattr(self.mixin, name)
    def __delattr__(self, name):
        return delattr(self.mixin, name)
    def __setattr__(self, name, value):
        return setattr(self.mixin, name, value)




Am I close?


-- 
Steven.


From f.guerrieri at gmail.com  Sat Sep 29 10:58:07 2007
From: f.guerrieri at gmail.com (Francesco Guerrieri)
Date: Sat, 29 Sep 2007 16:58:07 +0200
Subject: Python 3.0 migration plans?
In-Reply-To: <1191005046.213630.13340@57g2000hsv.googlegroups.com>
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<1190993122.979034.305060@50g2000hsm.googlegroups.com>
	<mailman.1236.1190995515.2658.python-list@python.org>
	<1190997769.002795.59450@57g2000hsv.googlegroups.com>
	<5m4qc2Fbbk19U1@mid.uni-berlin.de>
	<1191000394.828693.285210@k79g2000hse.googlegroups.com>
	<mailman.1239.1191002287.2658.python-list@python.org>
	<1191002679.569709.16870@22g2000hsm.googlegroups.com>
	<mailman.1244.1191003680.2658.python-list@python.org>
	<1191005046.213630.13340@57g2000hsv.googlegroups.com>
Message-ID: <79b79e730709290758p63c200a9q175e9456a6ee3688@mail.gmail.com>

On 9/28/07, TheFlyingDutchman <zzbbaadd at aol.com> wrote:

> Correct me if I am wrong, but none of those examples showed something
> in C++ similar to a decorator in Python - that is, unique syntax in
> the language for implementing a Higher Order Function. One thing I
> will say about those examples is that they make Python decorators look
> sweet!

That is exactly one of the points in having decorators, as far as I
can tell. Namely, that higher order functions are easily implemented,
if and when needed.

Francesco


From nagle at animats.com  Sat Sep 29 11:25:49 2007
From: nagle at animats.com (John Nagle)
Date: Sat, 29 Sep 2007 08:25:49 -0700
Subject: Python  and SSL
In-Reply-To: <7x641u0zvl.fsf@ruckus.brouhaha.com>
References: <1190959345.041723.108130@k79g2000hse.googlegroups.com>
	<46fd7e7b$0$18410$9b622d9e@news.freenet.de>
	<7x641u0zvl.fsf@ruckus.brouhaha.com>
Message-ID: <BXtLi.1877$P21.1727@newssvr19.news.prodigy.net>

Paul Rubin wrote:
> "Martin v. L?wis" <martin at v.loewis.de> writes:
>>> But how can I tell my Python program to trust my SSL certificate?
>> Why do you want to tell it that? The SSL module will trust *any*
>> server certificate, no need to tell it explicitly which ones to
>> trust.
> 
> Er, the whole idea of SSL is that you don't trust the connection.  So
> failing to authenticate the other end is a security failure and SSL
> should not be used that way.  From RFC 4346:
> 
>    Warning: Completely anonymous connections only provide protection
>             against passive eavesdropping.  Unless an independent
>             tamper-proof channel is used to verify that the finished
>             messages were not replaced by an attacker, server
>             authentication is required in environments where active
>             man-in-the-middle attacks are a concern.

     Right.  The key point here is that Python's standard SSL module
doesn't actually check the validity of SSL certificates.  It just
makes client connections without checking.  It will happily connect
to sites offering totally bogus certificates, even ones with the wrong
domain name.

     M2Crypto actually checks.  M2Crypto has much better functionality,
but it's rather hard to build.

				John Nagle


From ricaraoz at gmail.com  Thu Sep  6 13:22:21 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Thu, 06 Sep 2007 14:22:21 -0300
Subject: Text processing and file creation
In-Reply-To: <2dc0c81b0709051003n6b81493ah373ce626e172309e@mail.gmail.com>
References: <1189008809.718361.45790@g4g2000hsf.googlegroups.com>
	<2dc0c81b0709051003n6b81493ah373ce626e172309e@mail.gmail.com>
Message-ID: <46E0374D.5060102@bigfoot.com>

Shawn Milochik wrote:
> On 9/5/07, malibuster at gmail.com <malibuster at gmail.com> wrote:
>> I have a text source file of about 20.000 lines.
>> >From this file, I like to write the first 5 lines to a new file. Close
>> that file, grab the next 5 lines write these to a new file... grabbing
>> 5 lines and creating new files until processing of all 20.000 lines is
>> done.
>> Is there an efficient way to do this in Python?
>> In advance, thanks for your help.
>>

Maybe (untested):

def read5Lines(f):
    L = f.readline()
    while L :
        yield (L,f.readline(),f.readline(),f.readline(),f.readline())
        L = f.readline()

in = open('C:\YourFile','rb')
for fileNo, fiveLines in enumerate(read5Lines(in)) :
    out = open('c:\OutFile'+str(fileNo), 'wb')
    out.writelines(fiveLines)
    out.close()

or something similar? (notice that in the last output file you may have
a few (4 at most) blank lines)






From jfine at pytex.org  Wed Sep 19 10:52:55 2007
From: jfine at pytex.org (Jonathan Fine)
Date: Wed, 19 Sep 2007 15:52:55 +0100
Subject: Metatest 0.1.0
References: <mailman.721.1190126947.2658.python-announce-list@python.org>
	<1190130384.753009.142150@i13g2000prf.googlegroups.com>
	<46F006D5.3060609@pytex.org>
	<1190147863.968759.229330@g4g2000hsf.googlegroups.com>
	<46F05FB1.7070807@pytex.org>
	<1190196516.575165.175880@50g2000hsm.googlegroups.com>
Message-ID: <46F137C7.6080607@pytex.org>

Kay Schluehr wrote:
> On 19 Sep., 01:30, Jonathan Fine <jf... at pytex.org> wrote:
> 
> 
>>>there is no fundamental reason why it can't be separated from
>>>eeconsole.py.
>>
>>OK.  That might be a good idea.
> 
> 
> Ironically, I liked the idea of having more expressive assert
> statements - a discussion you brought up. But this requires either
> syntcatical analysis in the general case ( EE and assert magic ) some
> particular API ( Ben Finney ) or a somewhat restricted, but fully
> embedded, domain specific language ( Metatest ).
> 
> Here is what I got after an hour of hacking and filtering assert.
> Additional remarks are in line comments:

<snip>

Thank you for doing this coding, and providing an example of its use.

It seems to me that /writing the tests/ and /running the tests/ are two 
distinct, although linked, matters.  When programming, we are interested 
in running the tests.  When designing, we are interested in writing the 
tests.  And when looking at someone else's modules, we are interested in 
/reading the tests/.

Both Metatest and EasyExtend show that we have some freedom in how we 
choose to write our tests.

What I am interested in doing is developing and promoting a /language 
for writing tests/.  This has both a formal side and also conventions 
and examples of its use.  We would, of course, like that language to be 
Pythonic (if not exactly Python, although that would be a distinct 
advantage).

I think we can do this without having to think too much about 
implementation (although it would be useful to have experience of using 
the language).

I also think that some sort of 'filter' between the user and the Python 
commmand line would be useful.  GNU readline is a simple, and effective, 
example of the sort of thing I have in mind.

Thank you for discussing this with me, Kay and Ben.

-- 
Jonathan



From george.sakkis at gmail.com  Thu Sep  6 23:22:49 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 07 Sep 2007 03:22:49 -0000
Subject: Passing a tuple to a function as multiple arguments
In-Reply-To: <mailman.201.1189134535.2658.python-list@python.org>
References: <mailman.201.1189134535.2658.python-list@python.org>
Message-ID: <1189135369.981396.76350@r29g2000hsg.googlegroups.com>

On Sep 6, 11:02 pm, Ben Warren <bwar... at qstreams.com> wrote:
> Hello,
>
> Let's say I have a function with a variable number of arguments (please ignore syntax errors):
>
> def myfunc(a,b,c,d,...):
>
> and I have a tuple whose contents I want to pass to the function.  The number of elements in the tuple will not always be the same.
>
> T = A,B,C,D,...
>
> Is there a way that I can pass the contents of the tuple to the function without explicitly indexing the elements?

Yes:

myfunc(*T)

More details at http://docs.python.org/tut/node6.html#SECTION006730000000000000000


HTH,
George



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Sep  7 11:51:59 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 07 Sep 2007 17:51:59 +0200
Subject: How to determine the bool between the strings and ints?
In-Reply-To: <mailman.227.1189179649.2658.python-list@python.org>
References: <mailman.227.1189179649.2658.python-list@python.org>
Message-ID: <46e17398$0$31716$426a34cc@news.free.fr>

Jorgen Bodde a ?crit :
> Hi All,
> 
> I have a dictionary with settings. The settinfgs can be strings, ints
> or bools. I would like to write this list dynamically to disk in a big
> for loop, unfortunately the bools need to be written as 0 or 1 to the
> config with WriteInt, the integers also with WriteInt and the strings
> with a simple Write.
> 
> The list is something like;
> 
> options[A] = True
> options[B] = 1
> options[C] = "Hello"
> 
> I wanted to use isinstance to determine if it is a bool or an int or a
> string. However I am confused trying it out in the interactive editor;
> 
>>>> a = False
>>>> if isinstance(a, bool):
> ... 	print "OK"
> ... 	
> OK
>>>> if isinstance(a, int):
> ... 	print "OK"
> ... 	
> OK
> 
> I don't get it. is the bool derived from 'int' in some way?

Obviously : yes !-)

> What is
> the best way to check if the config I want to write is an int or a
> bool ?

 >>> isinstance(0, bool)
False
 >>> isinstance(1, bool)
False
 >>>

But anyway, I don't get the point, since "the bools need to be written 
as 0 or 1 to the config with WriteInt, the integers also with WriteInt". 
So you just don't care if it's a bool or not ? Or did I miss something ?


From jura.grozni at gmail.com  Tue Sep 18 23:46:01 2007
From: jura.grozni at gmail.com (azrael)
Date: Wed, 19 Sep 2007 03:46:01 -0000
Subject: Help, I'm going mad with this
Message-ID: <1190173561.822713.200070@d55g2000hsg.googlegroups.com>

Meanwhile I tried about 5 different implementations of the otsu
threshold algorithm. I'll go mad.
Please help me. I don't know what to do. I even tried to implement it
from c and java, but no way. nothing.
I've been reading about 5 ppt presentations and 4 pdf's and I failed.
Can someone look at this code.
If needed I can paste 3 other codes.

Testing list:


def otsu(hi):
    border=len(hi)
    for i in range(border):
        if hi[i]!=0:break
    for j in range(border-1,0-1,-1):
        if hi[j] != 0:break
    li=[]
    for k in range(i+1,j+1):
        q1=sum(hi[i:k])
        q2=sum(hi[k:j+1])
        v1=var(hi[i:k])
        v2=var(hi[k:j+1])
        a=q1*v1 + q2*v2
        li.append(a)

    m,n=li[0],i
    for k in range(len(li)):
        if li[k]>m:
            m=li[k]
            n=k



if __name__=="__main__":
    otsu(histogram)
    histogram= [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 1, 0, 2, 0, 0, 2, 1, 2, 0, 1, 3, 3, 3, 3, 1, 3,
1, 3, 5, 2, 3, 3, 3, 6, 3, 4, 5, 4, 9, 6, 11, 6, 10, 3, 11, 9, 9, 12,
22, 18, 34, 22, 28, 32, 25, 34, 38, 34, 54, 65, 106, 160, 167, 203,
282, 364, 446, 637, 816, 1022, 1264, 1456, 1646, 1753, 1845, 1922,
2203, 2231, 1973, 2245, 2369, 2349, 2258, 2130, 2066, 1835, 1640,
1554, 1414, 1179, 1024, 974, 938, 838, 785, 756, 803, 921, 952, 865,
722, 625, 608, 547, 498, 412, 438, 408, 413, 415, 339, 366, 330, 320,
293, 315, 368, 411, 434, 500, 531, 538, 552, 665, 811, 869, 998, 1021,
1075, 1080, 1030, 934, 926, 1074, 942, 941, 1014, 1440, 2966, 5301,
2729, 3400, 5563, 13096, 9068, 6045, 2813, 686, 180]


Well, this list is a example list that i have exported. for this list
the result the threshold should be at 218.

Thanks



From __peter__ at web.de  Mon Sep 24 03:03:02 2007
From: __peter__ at web.de (Peter Otten)
Date: Mon, 24 Sep 2007 09:03:02 +0200
Subject: strange behavious of the logging module?
References: <fd6n9i$8hc$1@news1.zdv.uni-mainz.de>
Message-ID: <fd7nf6$g14$02$1@news.t-online.com>

Christian Meesters wrote:

> Also, adding %(funcName)-8s to the formatter in basigConfig does not work
> for me: instead of the functions name the level in lower case gets inserted
> into the logfile.

When you call logging.info(...), "info" actually is the function name. As a
workaround use logging.getLogger(...).info(...).

It would still be a good idea to file a bug report.

Peter


From wolf_tracks at invalid.com  Thu Sep 20 23:24:40 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Fri, 21 Sep 2007 03:24:40 GMT
Subject: An Editor that Skips to the End of a Def
In-Reply-To: <tfAIi.51111$Um6.44314@newssvr12.news.prodigy.net>
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk>
	<tfAIi.51111$Um6.44314@newssvr12.news.prodigy.net>
Message-ID: <YPGIi.54591$YL5.26012@newssvr29.news.prodigy.net>

Is vim just an editor or is it capable of running and debugging a program, 
as well?

W. Watson wrote:
> Maybe I'll take a look. When I left the world of Unix/Linux 10 years 
> ago, emacs went with it, as did vi.
> 
> Paul Rudin wrote:
>> "W. Watson" <wolf_tracks at invalid.com> writes:
>>
>>> Thanks, but no thanks. The learning curve is way too steep.
>>
>> Up to you but, these days emacs comes with all sorts of
>> pointing-clicky-menu-y type things - you don't really have to learn
>> anything to get started.
>>
>> (It even gives useful advice on top-posting if you use it as a news
>> client :/)
> 

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From bert at bertisevil.tv  Tue Sep 18 20:48:27 2007
From: bert at bertisevil.tv (Evil Bert)
Date: Tue, 18 Sep 2007 17:48:27 -0700
Subject: Sets in  Python
In-Reply-To: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
Message-ID: <zl_Hi.9882$924.7601@newssvr23.news.prodigy.net>

sapsi wrote:
> 2) This is not related, but is there i neat way (without pop and list
> comprehension) to convert a set into a list? I say neat because i'm
> guessing using list comprehension might turn out be slow and there
> might be other methods which are faster.

a = set([1, 2, 3, 4])
b = list(a)


From steven.bethard at gmail.com  Mon Sep 24 15:19:49 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 24 Sep 2007 13:19:49 -0600
Subject: Can a base class know if a method has been overridden?
In-Reply-To: <1190647436.423328.217670@w3g2000hsg.googlegroups.com>
References: <1190647436.423328.217670@w3g2000hsg.googlegroups.com>
Message-ID: <jaOdnQPZ-blPkGXbnZ2dnUVZ_uHinZ2d@comcast.com>

Ratko wrote:
> I was wondering if something like this is possible. Can a base class
> somehow know if a certain method has been overridden by the subclass?

You can try using the __subclasses__() method on the class::

     >>> def is_overridden(method):
     ...     for cls in method.im_class.__subclasses__():
     ...         func = cls.__dict__.get(method.__name__)
     ...         if func is not None and func != method.im_func:
     ...             return True
     ...     return False
     ...
     >>> class A(object):
     ...     def foo(self):
     ...         return 'A.foo'
     ...     def bar(self):
     ...         return 'A.bar'
     ...
     >>> class B(A):
     ...     def foo(self):
     ...         return 'B.foo'
     ...
     >>> is_overridden(A.foo)
     True
     >>> is_overridden(A.bar)
     False

Given a method from the base class, is_overridden gets the base class, 
and then looks through every subclass of that class. If the function 
object for the subclass is ever different from that of the base class, 
then the base class's method must have been overridden.

STeVe


From steve at REMOVE-THIS-cybersource.com.au  Wed Sep 12 08:52:55 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Wed, 12 Sep 2007 12:52:55 -0000
Subject: An ordered dictionary for the Python library?
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<af72e$46e79a67$83aef404$9244@news2.tudelft.nl>
Message-ID: <13efo979vs6b44e@corp.supernews.com>

On Wed, 12 Sep 2007 09:51:02 +0200, stef wrote:

> If you're going to extend the dictionary, there's one other flag I'm
> continuously missing: "case-insensitive" key.

Completely untested and probably buggy as anything, but here's an 
absolutely minimal case-insensitive dictionary.

class CaselessDict(dict):
    def __setitem__(self, key, value):
        super(CaselessDict, self).__setitem__(key.lower(), value)
    def __getitem__(self, key):
        return super(CaselessDict, self).__getitem__(key.lower())


-- 
Steven.


From apardon at forel.vub.ac.be  Sat Sep 29 09:49:45 2007
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 29 Sep 2007 13:49:45 GMT
Subject: sorteddict [was a PEP proposal, but isn't anymore!]
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190829592.800804.242260@50g2000hsm.googlegroups.com>
	<1190881576.186259.313720@57g2000hsv.googlegroups.com>
	<1190897445.179828.291720@y42g2000hsy.googlegroups.com>
Message-ID: <slrnffslvp.40p.apardon@rcpc42.vub.ac.be>

On 2007-09-27, gatti at dsdata.it <gatti at dsdata.it> wrote:

> Is this a practical use case? When are sequential visits of all
> elements in order frequently suspended to make insertions and
> deletions, with a need for efficient lookup by key?

Does it need to be a sequential visit of *all* elements?

Suppose you have a mapping of start times to tasks. You can then want to
iterate over all tasks that need to be started between noon en 4 pm next
monday.  If you have a hashtable you still will need to sort all the keys
even if you will visit only 10%. If you have a tree you can just visit the
specified keys.

-- 
Antoon Pardon


From kelvie at ieee.org  Sun Sep 23 16:15:10 2007
From: kelvie at ieee.org (Kelvie Wong)
Date: Sun, 23 Sep 2007 13:15:10 -0700
Subject: building a GUI
In-Reply-To: <5lnp2rF90pqqU1@mid.uni-berlin.de>
References: <1190557293.266783.251480@y42g2000hsy.googlegroups.com>
	<mailman.940.1190560838.2658.python-list@python.org>
	<pan.2007.09.23.17.41.52@gmail.com>
	<mailman.945.1190571251.2658.python-list@python.org>
	<5lnp2rF90pqqU1@mid.uni-berlin.de>
Message-ID: <94ccbe710709231315s314971acpddbeb7eac0178fd8@mail.gmail.com>

On 9/23/07, Diez B. Roggisch <deets at nospam.web.de> wrote:
>
> stef mientki schrieb:
> > Thomas Dybdahl Ahle wrote:
> >> Den Sun, 23 Sep 2007 17:28:38 +0200 skrev stef mientki:
> >>
> >>> yadin wrote:
> >>>
> >>>
> >>>> if i were up to make a GUI chich are the advantages of choosing
> python
> >>>> over matlab or java?
> >>>>
> >>>>
> >>> The best is Delphi,
> >>> second is VB,
> >>>
> >>
> >> That sounds mostly like a personal preference :)
> >>
> >>
> > Well I prefer Python ( because of it's OS-independancy and it's open
> > source),
> > but Python is really (still) much worse for GUI designs.
> > Just compare some parameters like:
> > - ease of use
> > - speed of development
> > - support of features
> > - availability of libraries
> > - documentation
>
> Sounds like PyQt for me. Best GUI-designer I know, tremendous speed in
> development, giant sized lib that does all kinds of stuff & is
> brilliantly designed + professional grade docus.
>
> Diez
> --
> http://mail.python.org/mailman/listinfo/python-list
>

I'll have to agree completely here, Qt is just so great to work with.  It
makes my day job (I have to do it in C++) much more bearable.  Phil Thompson
(who maintains PyQt) is also very responsive and updates frequently even if
you haven't bought a commercial licence for it.

I also have to agree that the Qt Designer is the best I've ever had to work
with, and I can't think of an instance where Qt Assistant wasn't open on one
desktop or another.

-- 
Kelvie
-------------- next part --------------
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From tjreedy at udel.edu  Sun Sep 30 23:47:29 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 30 Sep 2007 23:47:29 -0400
Subject: Using fractions instead of floats
References: <1191202509.853059.222530@k79g2000hse.googlegroups.com><1191206183.441075.167450@57g2000hsv.googlegroups.com><52c50880709302007g4103c6c6h9b09ee376fa77998@mail.gmail.com>
	<52c50880709302010n7cbc070fn6223bd94a67542dd@mail.gmail.com>
Message-ID: <fdpqkh$p61$1@sea.gmane.org>


"Andres Riofrio" <andres.j.new at gmail.com> wrote in message 
news:52c50880709302010n7cbc070fn6223bd94a67542dd at mail.gmail.com...
| a question: Is there a way to make 5/2 return something other than an
| integer?

>>> from __future__ import division
>>> 1/2
0.5
>>> 5/2
2.5

tjr





From mitko at qlogic.com  Wed Sep  5 18:58:20 2007
From: mitko at qlogic.com (Mitko Haralanov)
Date: Wed, 5 Sep 2007 15:58:20 -0700
Subject: Need help with strange segfault
Message-ID: <20070905155820.4e9379bf@opal.pathscale.com>

I am attempting to get a working wrapper around the TransactionSet
class from the rpm module but I am getting unexplained segfaults
in /usr/bin/python.

The reason why I am working on a wrapper is that I want to have a
single RPM abstraction module which is thread-safe and does not tie up
the RPM database. So here is my wrapper class:

class Transaction:
    def __init__ (self, db=None):
        self.ts = None
        self.ts_lock = Lock ()
        self.db = db
        self.func = None

    # This method will acquire the lock, record the TransactionSet
    # method being called by the caller and return the pointer to
    # the call_ts_func () function, which will do all the work.
    def __getattr__ (self, name):
	self.ts_lock.acquire ()
        self.func = name
        return self.call_ts_func

    # This method serves as a wrapper around the actual TransactionSet
    # method being called. It will open the database, call the
    # TransactionSet method, close the databse, and then release the
    # lock acquired in the __getattr__ () function.
    def call_ts_func (self, *args):
        if not self.ts:
            if self.db: rpm.addMacro ("_dbpath", self.db)
            self.ts = rpm.TransactionSet ()
            self.ts.openDB ()
            if self.db: rpm.delMacro ("_dbpath")

        func = self.ts.__getattribute__ (self.func)
        rs = func (*args)

        self.func = None
        self.ts.clean ()
        self.ts.closeDB ()
        del self.ts
        self.ts = None
        self.ts_lock.release ()
        return rs

I am getting what appears to be a correct value in rs but as soon as I
try to access it from the caller function, Python segfaults.

Any help would be appreciated?

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

==========================================
Any programming language is at its best before it is implemented and
used.


From bignose+hates-spam at benfinney.id.au  Mon Sep 24 21:06:44 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 25 Sep 2007 11:06:44 +1000
Subject: vim - what's a smarttab?
References: <1190624225.926815.149720@50g2000hsm.googlegroups.com>
Message-ID: <878x6vpn8b.fsf@benfinney.id.au>

7stud <bbxx789_05ss at yahoo.com> writes:

> Alternatively, what is a smarttab?

(Marco has already shown that you can read the Vim help for this
topic, so I won't repeat that.)

There's no such thing as "a smarttab", and that's not what the option
means. It's the name of an option that enables or disables a certain
behaviour. You can think if it, rather, as "smart handling of the
<Tab> key".

-- 
 \     Rommel: "Don't move, or I'll turn the key on this can of Spam!" |
  `\                             -- The Goon Show, _Rommel's Treasure_ |
_o__)                                                                  |
Ben Finney


From jjl at pobox.com  Thu Sep 20 15:23:56 2007
From: jjl at pobox.com (John J. Lee)
Date: Thu, 20 Sep 2007 19:23:56 GMT
Subject: cannot create my own dict
References: <slrnff260r.43o.hat@se-162.se.wtb.tue.nl>
	<46f17c26$0$26298$426a74cc@news.free.fr>
	<slrnff463g.536.hat@se-162.se.wtb.tue.nl>
Message-ID: <87d4wdjg38.fsf@pobox.com>

"A.T.Hofkamp" <hat at se-162.se.wtb.tue.nl> writes:
[...]
> I can derive from dict, but the problem with that is that I start with a
> read/write dictionary, and I can only hope to plug all holes to prevent my data
> from leaking out.
> By starting from 'object', I certainly don't have that problem, I start with a
> closed bucket and punch holes in it in a controlled way.
> (I rather have the program drop dead due to not having enough access than
> have it continue with too much access causing havoc 500 statements later in a
> totally unrelated area.)
>
> Rather than write a bunch of code like
>
>     def __contains__(self, val):
>         return val in self.mydict
>
> I thought I'd simply do
>
>    self.__contains__ == self.d.__contains__
>
> which is exactly the same but less work (or so I thought), and possibly
> slightly faster.
>
> Well, no such luck thus :-(

UserDict.DictMixin

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


John


From gherzig at fmed.uba.ar  Thu Sep 20 19:26:46 2007
From: gherzig at fmed.uba.ar (Gerardo Herzig)
Date: Thu, 20 Sep 2007 20:26:46 -0300
Subject: executing list of methods (and collecting results)
Message-ID: <46F301B6.10801@fmed.uba.ar>

Hi all. Im in this situation: I want to perform several kind of 
(validating) methods to a given value.
Lets say i have a class named Number, and the following methods:
is_really_a_number(),
is_even(),
is_greater_than_zero(),
and so on. All of them returning booleans.

I want the collect_validators() method is to execute any of the above 
methods, and collect their names as items of a list (wich will be the 
collect_validators() return value).

My first approach is:

[code]
def collect_validators(self):
    v_dict = { 'is_really_a_number': is_really_a_number,
                      'is_even': is_even,
                      'is_greater_than_zero', is_greater_than_zero
                   }

       for name, meth in v_dict.items():
          result = meth()
          if result: yield name
[/code]

I wondering if is this a good pattern to apply, i like the way it looks 
like, at least to me it looks `natural', but...im calling every method 
twice here? One in v_dict and again on the dict iteration?

Any suggestion will be great!

Thanks!
Gerardo


From Shawn at Milochik.com  Tue Sep 11 16:46:52 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Tue, 11 Sep 2007 16:46:52 -0400
Subject: Difference between two times (working ugly code, needs polish)
Message-ID: <2dc0c81b0709111346p6ef754a4v30882cea06020aee@mail.gmail.com>

I have done what I wanted, but I think there must be a much better way.

Given two timestamps in the following format, I just want to figure
out how far apart they are (in days, seconds, whatever).

Format:

YYYY-MM-DD_MM:SS

Example:
2007-09-11_16:41


It seems to me that to do what I want, I need to convert a string into
a number (time.mktime()), such as this: 1189543487.0

Once I have that, I can just subtract one from the other and do
whatever I want. The ugly part is converting something like
2007-09-11_16:41 to the numeric equivalent.

Below is my code. Any suggestions?

Thanks in advance.


Here is what I have (works):

#runTimeStamp is the current time, set when the script begins execution
def recAge(lastUpdate, runTimeStamp):

    import re

    oneDay = 60 * 60 * 24

    lastUpdate = re.sub(r'\D+', ',', lastUpdate)
    lastUpdate = lastUpdate + ",0,0,0,0"
    lastUpdate = [int(x) for x in lastUpdate.split(',')]
    lastUpdate = time.mktime(tuple(lastUpdate))

    runTimeStamp = re.sub(r'\D+', ',', runTimeStamp)
    runTimeStamp = runTimeStamp + ",0,0,0,0"
    runTimeStamp = [int(x) for x in runTimeStamp.split(',')]
    runTimeStamp = time.mktime(tuple(runTimeStamp))

    return (runTimeStamp - lastUpdate) / oneDay


From bjorn.kempen at gmail.com  Sat Sep 15 15:21:50 2007
From: bjorn.kempen at gmail.com (buffi)
Date: Sat, 15 Sep 2007 19:21:50 -0000
Subject: Python statements not forcing whitespace is messy?
Message-ID: <1189884110.006272.240840@50g2000hsm.googlegroups.com>

Am I the only one that thinks that python statements should force
whitespace before and after them?

Right now this is not enforced and for an example these statements are
valid

print"hello"
"foo"if"bar"else"foobar"
for(x,y)in[(1,2),(3,4)]:print(x,y)
[(y)for(x,y)in[("foo",2),("bar",4)]if"foo"in(x)]

...and so on.

I know that writing code like this really shouldn't be done but
wouldn't it be a good idea to enforce the use of whitespace around
statements?

(I wrote a short blog post about this here http://blog.buffis.com/?p=55
but thought I would post here as well to see what other developers
think)
- Bj?rn Kemp?n



From a24900 at googlemail.com  Tue Sep 11 13:13:37 2007
From: a24900 at googlemail.com (Hunter Gratzner)
Date: Tue, 11 Sep 2007 17:13:37 -0000
Subject: Car-ac-systems
In-Reply-To: <cd6dnW0Vf8-wOnvbRVnyhwA@eclipse.net.uk>
References: <1189511932.371621.112970@o80g2000hse.googlegroups.com>
	<BeqdnaFrktIgBHvbnZ2dnUVZ8v-dnZ2d@eclipse.net.uk>
	<YaadnYyTWsmTAnvbnZ2dnUVZ_iydnZ2d@comcast.com>
	<cd6dnW0Vf8-wOnvbRVnyhwA@eclipse.net.uk>
Message-ID: <1189530817.997394.156890@w3g2000hsg.googlegroups.com>

[top posting fixed]

> "Lew" <l... at lewscanon.com> wrote in message
>
> news:YaadnYyTWsmTAnvbnZ2dnUVZ_iydnZ2d at comcast.com...
> > I'm starting to see "blogspot" as a synonym for "spam".

On Sep 11, 4:33 pm, "John Timney \(MVP\)"
<x_j... at timney.eclipse.co.uk> wrote:
> Thats all it is.  It may have been a usefully intended resource once, but
> they have no controls whatsoever.  Its time someone closed it down.

Blogspot, aka blogger getting closed down is very unlikely. It is a
Google company. And just as Google doesn't care about Usenet spam
originating via Google Groups, Google also doesn't care about spammers
on Blogspot/Blogger. All they care about is making AdSense money.



From hat at se-162.se.wtb.tue.nl  Tue Sep 25 03:30:56 2007
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Tue, 25 Sep 2007 09:30:56 +0200
Subject: An Editor that Skips to the End of a Def
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk> <fd0au1$fro$1@lust.ihug.co.nz>
	<5lhs4pF8bkunU1@mid.individual.net> <fd4168$ige$1@lust.ihug.co.nz>
	<slrnfff9op.1is.horpner@FIAD06.norwich.edu>
	<fd9ncb$q3l$1@lust.ihug.co.nz>
Message-ID: <slrnffhe9g.2db.hat@se-162.se.wtb.tue.nl>

On 2007-09-25, Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> wrote:
> In message <slrnfff9op.1is.horpner at FIAD06.norwich.edu>, Neil Cerutti wrote:

> That's like saying, about a program that, when given "2 + 2", outputs "5",
> that _of course_ it knows the correct answer is "4", it just chooses
> to "modify" the answer before outputting it.
>
> Why does it "choose" to modify your position when you exit insert mode? Does
> the phrase "broken as designed" mean anything to you?

Try to insert 1 character in the middle of a line. You'll end up at the same
position. Now press 'j' (one line down), then '.' (do it again).
I believe that's why.

Great when you have nicely formatted columns of code underneath each other.


(try doing that with your GUI editor with 2 strokes per line of code).



Of course, the same works for a find/edit cycle ('n', check whether edit is
appropiate, and if so: '.')
This combining of commands is what makes the editor powerful.

The cost of that power is a command/insert mode and a steep learning curve.


You may not like the keyboard interface, but that doesn't mean the editor is
not well-designed for its task. In the same way, having the ability to use
multiple input devices doesn't automatically make the editor better.

For example, ever wondered why you on earth you need CTL-C and CTL-V to
copy/paste? Why not simply select with the mouse, then right-click to paste?

All editors have their good and their bad sides. Assuming that anything you
don't like is badly designed is a bit too simple in my opinion.

> And the downside is that the largest single proportion of those commands end
> up being variations on "enter insert mode". Because most of the keystrokes
> you enter during an editing session are in fact text to be input into the
> file, not commands to manipulate that text. So in a modal editor, having to

Depends on what you are doing. When entering new code, yes. When maintaining
code, no (lots of small changes).

In one way or another, you'll have to tell the editor what you want. The cost
of that is either a command/insert mode (vi/vim), a CTL/SHIFT/META-key
combination (emacs), or mouse/menu/submenu/subsubmenu (GUI editors).

I don't know what is best. Probably a matter of taste.


Albert



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Sep 19 06:36:29 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 19 Sep 2007 12:36:29 +0200
Subject: super() doesn't get superclass
In-Reply-To: <876427zhzq.fsf@benfinney.id.au>
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au>
Message-ID: <46f0fba0$0$29605$426a34cc@news.free.fr>

Ben Finney a ?crit :
> Bruno Desthuilliers <bruno.42.desthuilliers at wtf.websiteburo.oops.com> writes:
> 
>> Ben Finney a ?crit :
>>> Evan Klitzke <evan at yelp.com> writes:
>>>> On Tue, 2007-09-18 at 14:15 +1000, Ben Finney wrote:
>>>>> [the 'super' function] doesn't return the superclass, it returns
>>>>> the next class in the MRO, whether that's a superclass or not.
>>>> The next class in the MRO _is_ a superclass.
>>> [demonstration that the next class in the MRO is not necessarily a
>>> superclass]
>>>
>>> You seem to be saying that now suddenly D *is* a superclass of
>>> A. 
>> I don't see such an assertion in Evan's answer. Chapter and verse
>> ???
> 
> I've trimmed the quoting to make it clearer.
> 
> Evan is claiming that "the next class in the MRO _is_ a superclass",
> apparently by his definition or some other that I've not seen.

The next class in the MRO *is* a superclass of the *instance*. Else it 
wouldn't be in the MRO !-)

> I've shown a fairly simple multiple-inheritance hierarchy where the
> next class in the MRO is not an ancestor of the subject class,

It's an ancestor of the class of the instance on which the method is 
called.

> Either "superclass of A" is equivalent to "ancestor class of A", or
> it's not. I maintain that many programmers will expect that it is, but
> Evan's assertion says otherwise. It can't be both.
> 
>>> That's certainly not what users will think of when they think
>>> "superclass" though.
>> If a class X is in the MRO of call Y, then X is a superclass of Y.

s/call/class/, of course.


> That goes completely against what Alex Martelli told me, which was
> that "superclass" can be thought of as synonymous with "ancestor".

Pardon ???

I repeat: if class X is in the MRO of class Y, then X is a superclass of 
class Y. Which indeed makes X an ancestor of Y.

>> I agree that the documentation for super is somewhat misleading (and
>> obviously wrong),
> 
> Well, that's the first time someone has acknowledged that in this
> thread, so I guess this is something.

OTHO, I don't think anyone here stated that the doc was right !-)

>> but it still *give access to* (at least one of) the superclass(es).
> 
> Only if you allow "some class somewhere in the inheritance tree, even
> one this class never inherited from directly or indirectly" to be in
> the definition of "superclass".

By definition, if the class is in the inheritence tree, then this class 
is inherited from directly or indirectly. FWIW, I've never caught 
super() calling a class that was not in the inheritence tree of the 
instance passed to it... If you noticed such a thing, then by all mean 
fill a bug report.

> I'm arguing that what people mean by "superclass" is "a direct or
> indirect ancestor class", and it's highly misleading to imply that by
> the function name what that's not what the function does.

Please remember that super() is usually called with *2* arguments : the 
class in which the method is defined (let's call this class C), *and* an 
instance. This instance may be an instance of a *subclass* of C. So the 
MRO to consider is the MRO *of the instance*. Else, super would be 
totally useless.

>>>>> After reading the rest of the article, I'm amazed that 'super'
>>>>> as currently implemented is in Python at all.
>> If you have a better solution for handling multiple inheritence,
>> please share with us.
> 
> My concern is to at least not *directly mislead* the programmer
> through a badly-named

Or badly documented

 >  function

class. super is not a function, it's a class.

> If 'super' can invoke a non-superclass

super won't never "invoke" anything that's not in the MRO of the 
*instance* passed to it.

> ? if instead it gets "the next class in the MRO" ? then this is at the
> least badly-named.

Possibly, but this is another point.

>> FWIW, after all the articles I've read explaining why Python is
>> badly designed, badly implemented, and totally flawed, I do wonder
>> why this language exists at all !-)
> 
> In most of those arguments I'm firmly on the side of the Python
> designers. Not on this one.

Well, I understand that you disagree with both the documention and the 
name of super. As far as I'm concerned, the mere fact that this 
discussion happens is probably a sign that there's something to be fixed 
here - at least wrt documentation, possibly wrt/ naming. But the 
*feature* by itself is certainly something we do want to keep, whatever 
some may argue.

>>> I don't want to break the inheritance chain. I want the
>>> superclass,
>> A soon as you have either multiple inheritence and/or an inheritence
>> tree with depth > 1, there's no such thing as "the" superclass. wrt/
>> your exemple, object, A, B, C and D are *all* superclasses of E.
> 
> Yes, they are. But my example was not "get the superclass of E", but
> "get the superclass of A".

You wrote:

"""
If I define a class hierarchy as follows::

     class A(object): pass
     class B(object): pass
     class C(A): pass
     class D(B): pass

is it true to say that "D is a superclass of A"? No, because they're
entirely unrelated except that they inherit from 'object'. The
superclass of 'A' is 'object'.

How about this:

     class E(C, D): pass

In this instance, the MRO now has D following A; but the superclass of
'A' is still 'object'.
"""

If I understand correctly, your concerns are with the superclass*es* of 
E, not with the superclass of A.

> The *only* ancestor of 'A' in the example is 'object',

Yes.

> so I expect
> "superclass of A" to *always* get 'object'. But that's not what
> happens!

superclass of A is object, no problem. But the next (according to the 
MRO you defined) superclass of an instance of E is not necessarily A...

> Instead, it *sometimes* gets 'object', and *sometimes* gets 'D' ?
> depending on who has inherited from a class that isn't even 'A'!
> That's what makes 'super' definitely misnamed,

Badly documented, and (very) possibly (as this whole thread illustrates) 
misnamed...

> and practically
> unusable.

And perfectly usable. At least once you understand what it's for.

>> The next class in the MRO is (usually and AFAICT) the most direct
>> superclass.
> 
> Demonstrably not, in the examples given in
> <URL:http://fuhm.org/super-harmful/>.
> 
>> I wouldn't use such an extreme word as 'madness', but I totally agree
>> that this should be corrected. Care to submit a doc patch ?
> 
> I don't understand what practical uses 'super' is intended for 

There's a whole article on it on python.org:
http://www.python.org/download/releases/2.2/descrintro/#cooperation

The goal is to call the correct "next" method according to MRO. Indeed, 
it could have been name "call_next_method".

> (only
> that they don't seem to match any of my needs),

If all you want is to get at the direct ancestor of the *class* in wich 
a method is defined, the solution is well-known and quite obvious: call 
this class directly. ie:

class A(object):
   def __init__(self):
      print "A.__init__"

class B(object):
   def __init__(self):
      A.__init__(self)
      print "B.__init__"


Note that in this case, you'll get exactly the same result with :

class B(object):
   def __init__(self):
      super(B, self).__init__()
      print "B.__init__"


super is only useful when MI comes in play - which BTW is not that 
common in Python.



From nir1408 at gmail.com  Fri Sep 21 06:28:08 2007
From: nir1408 at gmail.com (Nir)
Date: Fri, 21 Sep 2007 10:28:08 -0000
Subject: pdb attach?
In-Reply-To: <mailman.806.1190295221.2658.python-list@python.org>
References: <mailman.806.1190295221.2658.python-list@python.org>
Message-ID: <1190370488.359297.86510@w3g2000hsg.googlegroups.com>

On Sep 20, 3:26 pm, Hynek Hanke <ha... at brailcom.org> wrote:
> Hello,
>
> please, is there something like 'attach' in pdb yet? My application uses
> threads
> and when it freezes (e.g. due to a deadlock situation), I'd like to get
> the traceback
> of all threads and inspect at which point did the application get into
> problems.
> Or could I send a signal to such a python process so that it would
> output backtraces
> from all threads before terminating?
>
> Because currently, if a thread runs into deadlock problems (or a thread
> fails on
> an exception and the other thread can't join it), I have no way of
> determining
> what went wrong.
>
> Such processes are not possible to terminate via CTRL-C in the
> interpreter, so
> I can't get the backtrace this way. Furthermore, I also need todebug
> subprocesses,
> so these are difficult to invoke interactively.
>
> I'm happy for any suggestions.
>
> Thank you,
> Hynek Hanke

Try to debug with winpdb:
http://www.digitalpeers.com/pythondebugger/

Any feedback will be appreciated.



From jgardner.jonathangardner.net at gmail.com  Thu Sep  6 16:58:28 2007
From: jgardner.jonathangardner.net at gmail.com (Jonathan Gardner)
Date: Thu, 06 Sep 2007 20:58:28 -0000
Subject: initializing cooperative method
In-Reply-To: <1189102680.957512.152950@k79g2000hse.googlegroups.com>
References: <1189095131.853954.233660@r34g2000hsd.googlegroups.com>
	<13e0bgg5lo0p2ec@corp.supernews.com>
	<1189102680.957512.152950@k79g2000hse.googlegroups.com>
Message-ID: <1189112308.681310.219730@y42g2000hsy.googlegroups.com>

On Sep 6, 11:18 am, jelle <jelleferi... at gmail.com> wrote:
> Ai, calling super(Abstract) is just getting object, sure...
>
> However, I'm still curious to know if there's a good idiom for
> repeating the argument in __init__ for the super(Concrete,
> self).__init__ ?
>

If you don't know what the arguments are, you can use *args and
**kwargs.

    class Concrete(Abstract):
        def __init__(self, *args, **kwargs):
            super(Concrete, self).__init__(*args, **kwargs)




From pavlovevidence at gmail.com  Fri Sep  7 20:58:33 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 07 Sep 2007 17:58:33 -0700
Subject: Speed of Python
In-Reply-To: <mailman.230.1189183406.2658.python-list@python.org>
References: <mailman.230.1189183406.2658.python-list@python.org>
Message-ID: <1189213113.384354.86980@50g2000hsm.googlegroups.com>

On Sep 7, 12:42 pm, "wang frank" <f... at hotmail.co.jp> wrote:
> Hi,
>
> While comparing the speed of octave and matlab, I decided to do a similar
> test for python and matlab. The result shows that python is slower than
> matlab by a factor of 5. It is not bad since octave is about 30 time slower
> than matlab.
>
> Here is the result in matlab:
> Elapsed time is 0.015389 seconds.
>
> and in Python:>>> t=timeit.Timer("bench1.bench1(10)","import bench1")
> >>> t.repeat(1,1)
>
> [0.071012377266015392]
>
> Here is the bench1.py:
> import math
> def bench1(n):
>         for i in range(n):
>                 for j in range(1000):
>                         m=j+1
>                         z=math.log(m)
>                         z1=math.log(m+1)
>                         z2=math.log(m+2)
>                         z3=math.log(m+3)
>                         z4=math.log(m+4)
>                         z5=math.log(m+5)
>                         z6=math.log(m+6)
>                         z7=math.log(m+7)
>                         z8=math.log(m+8)
>                         z9=math.log(m+9)
>         return z9
>
> Is my conclusion correct that Python is slower than matlab?


Whoa, there, chief, that's a pretty lofty conclusion to make based on
one benchmark.

A blanket speed comparison between Matlab and Python isn't productive:
they each have their own strengths speedwise.

(Conversely, a blanket comparison is productive programmingwise.
Matlab has almost no strengths relative to Python in that department.
But that's another question entirely. :)

Roughly speaking, I'd say your average single-pass calculation script
is going to be faster in Matlab than in Python.  However, Python (with
help from numpy) has more opportunities for optimization, especially
if you're using large matrices.  And if you need to take it up a
notch, Python has very good ways to integrate numerical C and Fortran
code.


> Are there any
> way to speed it up? It seems Python automatically created bench1.pyc. Does
> Python automatically execute the bench1.pyc to speed it up?

Yes, as others have explained.


Carl Banks



From robert.kern at gmail.com  Thu Sep  6 17:12:33 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 06 Sep 2007 16:12:33 -0500
Subject: Python and CUDO
In-Reply-To: <46E05DC0.7090102@glocalnet.net>
References: <46E05DC0.7090102@glocalnet.net>
Message-ID: <fbpqg9$ues$1@sea.gmane.org>

Veronika Lindstrand Kant wrote:
> Hi!
> I just wonder if there are any plans for building any support using 
> NIVIDAS CUDO plattform into python?

Not into Python itself, but we are working on interfacing with NVIDIA's CUDA,
yes (presuming you actually meant "NVIDIA's CUDA" rather than "NIVIDAS CUDO").

http://code.google.com/p/pystream/

-- 
Robert Kern

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



From DustanGroups at gmail.com  Thu Sep 20 07:03:12 2007
From: DustanGroups at gmail.com (Dustan)
Date: Thu, 20 Sep 2007 11:03:12 -0000
Subject: Sets in Python
In-Reply-To: <_cmIi.3452$ZA5.919@nlpi068.nbdc.sbc.com>
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
	<CeB*qHeVr@news.chiark.greenend.org.uk>
	<1190235483.412972.81280@v23g2000prn.googlegroups.com>
	<_cmIi.3452$ZA5.919@nlpi068.nbdc.sbc.com>
Message-ID: <1190286192.103681.235270@w3g2000hsg.googlegroups.com>

On Sep 19, 10:58 pm, Bryan Olson <fakeaddr... at nowhere.org> wrote:
> Bad news: Python 3000 has no immutable type for byte-strings.
> The new bytes type cannot serve for dict keys or set members.
> Many things one would want to hash are unhashable -- for
> example, the results of the hash functions in hashlib.

Are you serious????



From joshua at eeinternet.com  Mon Sep 17 18:13:32 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Mon, 17 Sep 2007 14:13:32 -0800
Subject: why does Configparser change names to lowercase ?
References: <46EAED39.9080209@gmail.com>
Message-ID: <fcmu6c$bh5$1@sea.gmane.org>

On Friday 14 September 2007 12:21, stef mientki wrote:
> Why does  Configparser change names to lowercase ?
> 
> As Python is case sensitive (which btw I don't like at all ;-)
> but now when really need the casesensitivity,
> because it handles about names which should be recognized by human,
> it changes everything to lowercase ????
> 
> thanks,
> Stef Mientki

According to the ConfigParser docs:

"All option names used in interpolation will be passed through the
optionxform() method just like any other option name reference. For
example, using the default implementation of optionxform() (which converts
option names to lower case), the values "foo %(bar)s" and "foo %(BAR)s" are
equivalent."

So, it seems it would be trivial so sublcass ConfigParser, and reimplement
optionxform()

Hope that helps.

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE



From lasses_weil at klapptsowieso.net  Fri Sep  7 05:46:38 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Fri, 07 Sep 2007 11:46:38 +0200
Subject: unexpected behavior: did i create a pointer?
In-Reply-To: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>
References: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>
Message-ID: <46e11dfe$0$4517$9b4e6d93@newsspool3.arcor-online.net>

gu wrote:
> hi to all!
> after two days debugging my code, i've come to the point that the 
> problem was caused by an unexpected behaviour of python. or by lack of 
> some information about the program, of course! i've stripped down the 
> code to reproduce the problem:
> 
> [snip FAQ]

Yes, basically you *created* a pointer. That's all that python has: 
pointers.

When saying
   >>> a = AnyOldObject()
   >>> b = a
then 'a' and 'b' are different /names/ for the /very same/ object (try 
"a is b", or "id(a)==id(b)").

This is really a FAQ (once a week or so?), but for the life of me I 
can't find the right words for a google query.
TO THE TROOP: What keywords would you attach to that question?

/W


From paul at boddie.org.uk  Thu Sep  6 06:56:26 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Thu, 06 Sep 2007 03:56:26 -0700
Subject: Any syntactic cleanup likely for Py3? And what about doc
	standards?
In-Reply-To: <mailman.108.1189018988.2658.python-list@python.org>
References: <mailman.108.1189018988.2658.python-list@python.org>
Message-ID: <1189076186.590996.190380@o80g2000hse.googlegroups.com>

On 5 Sep, 21:02, Kenneth McDonald <kenneth.m.mcdon... at sbcglobal.net>
wrote:
> The reading I've done so far on Python 3 (alpha announcement, meta-PEP,
> some other PEPs) is generally encouraging, but there doesn't seem to be
> much on cleaning up the syntax, which has become uglier over time as
> features have been added on to an original syntax that wasn't designed
> to support them. It seems to me (from what little I've read--I admit
> that it's impossible to know for sure without experimenting quite a bit,
> for which I don't currently have the time) that new features such as
> multimethods might just make things more confusing (especially for
> newbies) in a lot of ways, without appropriate syntactic support.

I think there's been a widespread "kitchen sink" mentality around the
Python language for some time, which is where the multimethods
proposal, amongst others, fits in here. If we look at a selection of
PEPs, this trend is quite evident even amongst those accepted for
inclusion:

  PEP 3102 (Keyword-Only Arguments) - provides some benefits, but with
           an odd syntax and still more gymnastics for each function
           call.

  PEP 3104 (Access to Names in Outer Scopes) - syntactically a very
           large bikeshed indeed, but will keep the closure-happy
           people happy.

  PEP 3105 (Make print a function) - laudable, but leads to the not
           particularly flattering observation that someone made about
           Python 3.0 breaking "hello world". "Real men" don't use
           print, apparently, but a print function will presumably let
           them show their gentler side (or embrace the dark side).

  PEP 3107 (Function Annotations) - otherwise known as the freedom for
           developers to annotate the hell out of functions for the
           purpose of stating type information explicitly, although
           they're not really for that, apparently. <nudge> <wink>
           Expect n lines of decorators plus n lines of function
           signature in shinier code bases.

Eventually, we get to PEP 3113 (Removal of Tuple Parameter Unpacking)
which is a clean-up. Meanwhile, PEP 3108 (Standard Library
Reorganization) gets a mere wave of the hand with respect to core
development priorities. Oh sure, we've got Python Eggs and can
potentially unbundle everything these days - although I note that the
CPython runtime itself doesn't get more modular and is seemingly
resistant to attempts to make it easier to cross-compile - so perhaps
one of Python's biggest selling points (the batteries included, now
corroding in the battery compartment) isn't that important. I'll
accept that the new I/O system (PEP 3116) could be beneficial, and I
don't underestimate the effort put in by Martin von L?wis and others
to tidy up and clarify certain awkward matters (PEPs 3120, 3121,
3131), but as people increasingly demand more innovation from the
runtime, what we get is stuff like the renaming of various methods and
PEP 3101 (Advanced String Formatting).

> Currently the most obvious example of this is Python 2.5's way of
> defining properties, which is ugly. leads often to writing of
> unnecessary code, and certainly doesn't make property code clear to a
> reader. Contrast this to the way properties (things that look like an
> instance variable but are actually bound to methods) are handled in Ruby
> and (IIRC, this also does a decent job) C#.

Despite my own feeling that properties are overrated, possibly due to
experience with languages and systems whose developers don't fear
showing method invocations off, I guess this is just one area where
some backward incompatibility breakage could have produced a "high
value" syntax enhancement.

> On the other hand, it does seem that some new syntactic support for
> other features will be added, so perhaps I'm just missing whichever PEPs
> talk about going back and adding cleaner syntax for existing features...?

I've tried to track the things people previously complained about and
any remedies for those things in Python 3000. See here for details:

http://wiki.python.org/moin/PythonWarts

> Finally, another thing I've perhaps missed, but I can't see anything in
> what I've gone through, about correcting of of what I see to be one of
> Python's most long-standing really serious flaws, which is the lack of
> an official standard documentation markup syntax for writing
> documentation in code.

I'm not really a fan of docstring markup languages and tend to switch
as much of that off as possible in tools like epydoc. This comes from
having to work on code bases with documentation comments like the
following:

/**
 * TODO - What does this function do?
 * @param horse Horse The Horse
 * @param dereferencer SpecialDereferencer The SpecialDereferencer
 * @param options AnimalOptions AnimalOptions
 */
void Paddock::InitP97(Horse& horse, SpecialDereferencer* dereferencer,
AnimalOptions options)

I've not completely abandoned the hope that one day we'll get half
decent type information in generated documentation without having to
write it over and over again in docstrings, even for Python code.

Paul



From Scott.Daniels at Acm.Org  Mon Sep 10 23:36:05 2007
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Mon, 10 Sep 2007 20:36:05 -0700
Subject: Modul (%) in python not like in C?
In-Reply-To: <TM0Fi.4172$FO2.18@newssvr14.news.prodigy.net>
References: <mailman.294.1189364475.2658.python-list@python.org>
	<TM0Fi.4172$FO2.18@newssvr14.news.prodigy.net>
Message-ID: <13ec37dri08s7a3@corp.supernews.com>

Bryan Olson wrote:
> Dotan Cohen wrote:
...
>> Second, in Turbo C -111%10=-1 however in python -111%10=9. Is one or
>> the other in error? 
> 
> Turbo C is correct here with respect to the C standard. Python
> is correct with respect to the Python Reference Manual.
> 
> They also disagree about integer division. C rounds toward zero;
> Python rounds downward.
> 
> In C:       -111 / 10  evaluates to -11
> In Python:  -111 / 10  evaluates to -12

C, which was designed as a "high level assembly language," does not
tightly define the results of / and % for negative numbers.  Instead
it defines the result for positive over positive, and constrains the
result for the others.  The reason is simple: most CPUs available
at the time provided a single operation that produced both the quotient
and the remainder, but some produced -1 for -3 / 2, and others produced
1 for -3 / 2.  Either result is justifiable, but the most common use
of division and remainder is positive / positive, and it would be a
shame to generate a test for every division and modulus just to cover
the negative / positive case.  You would be slowing down the majority
of code to satisfy the (usually non-existant) corner case.

-Scott David Daniels
Scott.Daniels at Acm.Org


From llasram at gmail.com  Thu Sep 20 10:31:41 2007
From: llasram at gmail.com (Marshall T. Vandegrift)
Date: Thu, 20 Sep 2007 10:31:41 -0400
Subject: super() doesn't get superclass
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au>
	<46f0fba0$0$29605$426a34cc@news.free.fr>
	<1190199134.791808.267110@22g2000hsm.googlegroups.com>
	<mailman.778.1190225664.2658.python-list@python.org>
	<1190256493.827576.139470@r29g2000hsg.googlegroups.com>
Message-ID: <87zlzhh0he.fsf@seneca.iss.local>

Michele Simionato <michele.simionato at gmail.com> writes:

> I am not against mixins (even if I am certainly very much against the
> *abuse* of mixins, such as in Zope 2). What I would advocate (but I
> realize that it will never happen in Python) is single inheritance +
> mixins a la Ruby.

Ruby might be a bad example here.  Although the Ruby language syntax
only supports single inheritance, mixins are implemented as multiple
inheritance under the hood.  That is, inheriting from a class and
including a class as a mixin modifies the sub-/mixing class in exactly
the same way.

-Marshall



From schlenk at uni-oldenburg.de  Thu Sep 13 15:50:32 2007
From: schlenk at uni-oldenburg.de (Michael Schlenker)
Date: Thu, 13 Sep 2007 21:50:32 +0200
Subject: automatic parallelization
In-Reply-To: <KYidna_Q5d86FnTbnZ2dnUVZ_sSlnZ2d@speakeasy.net>
References: <KYidna_Q5d86FnTbnZ2dnUVZ_sSlnZ2d@speakeasy.net>
Message-ID: <46E99488.20909@uni-oldenburg.de>

Mikhail Teterin schrieb:
> While C/C++ and Fortran have OpenMP (http://www.OpenMP.org/), there is
> nothing comparable in Tcl (nor, as far as I know, in the two other
> scripting languages).
> 
> Or is there? I'd like to, for example, have a version of foreach loop, that
> would split the tasks between concurrently executing threads in order to
> scale to the number of available CPUs:

For CPython you don't get any benefit from extra CPUs even if you tried
(unless the code inside your loop is specially written C code), due to
the GIL.

For Perl i don't know, their threading model was a bit heavy last time i
looked, but i might be off with that, so maybe its doable in Perl.

For Tcl you would at least get the benefit of multiple CPUs, but its
more message passing based thread model is probably not the best for
autoparallelization like OpenMP (but you could use the tsv:: api for
shared vars if you want to).

> 
> For example:
> 
>  pforeach image $images {
>   set exif($image) [extract_exif $image]
>  }
> 
> The script would be the same on a single- and a multi-CPU computer, but
> would automatically take advantage of multiple processors, when possible.

Its doable in principle, but as with OpenMP you need extra annotations
to make it workable.

If you have an event style script in Tcl you might be easier able to use
threads, as the thread::send -async api fits very well with the event
based style.

Michael



From steve at holdenweb.com  Sat Sep  1 03:08:31 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 01 Sep 2007 03:08:31 -0400
Subject: list index() (OT)
In-Reply-To: <007f01c7ec65$605e6700$03000080@hendrik>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com><46d674c2$0$417$426a34cc@news.free.fr><1188496588.750629.208100@g4g2000hsf.googlegroups.com><1188497498.3468.60.camel@dot.uniqsys.com><021801c7eba2$ad429640$03000080@hendrik>	<1cnfd31du01el95u70o8mjn9cb5r5aluiu@4ax.com>
	<007f01c7ec65$605e6700$03000080@hendrik>
Message-ID: <fbb35i$3co$2@sea.gmane.org>

Hendrik van Rooyen wrote:
> "Richie Hindle" <richi...ian.com> wrote:
> 
>> But - the word for someone who posts to the internet with the intention of
>> stirring up trouble derives from the word for what fishermen do, not from
>> the word for something that lives under a bridge.  It derives from "trolling
>> for suckers" or "trolling for newbies".
> 
> So am I right in asserting that there is a difference in pronunciation
> of the noun and the verb?
> 
> He is a Troll - like the excellent frolic example
> He likes to Troll - rhymes with roll?
> 
I think you are seeking consistency where none exists. I don't believe 
anyone uses different pronunciations for the noun and the verb (which I 
guess will make those who *do* come out of the woodwork in double-quick 
time).

Where's Godwin's Law when yo need it?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From fakeaddress at nowhere.org  Sun Sep  9 21:06:59 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Mon, 10 Sep 2007 01:06:59 GMT
Subject: Modul (%) in python not like in C?
In-Reply-To: <mailman.294.1189364475.2658.python-list@python.org>
References: <mailman.294.1189364475.2658.python-list@python.org>
Message-ID: <TM0Fi.4172$FO2.18@newssvr14.news.prodigy.net>

Dotan Cohen wrote:
> FIrst of all, how is the % symbol (as in 70%6=4) called in English?

The operator is usually called "mod". (The symbol is usually
called "percent".)

I reserve "modulo" for its usage in mathematics. 70 modulo 6
is an equivalence class containing infinitely many integers.
In math talk, 4 is the least residue of 70 modulo 6.


> Second, in Turbo C -111%10=-1 however in python -111%10=9. Is one or
> the other in error? 

Turbo C is correct here with respect to the C standard. Python
is correct with respect to the Python Reference Manual.

They also disagree about integer division. C rounds toward zero;
Python rounds downward.

In C:       -111 / 10  evaluates to -11
In Python:  -111 / 10  evaluates to -12


> Is this a known gotcha? I tried to google the
> subject however one cannot google the symbol %.

I think it's a known gotcha. I cited the refs in another post.


-- 
--Bryan


From brusstoc at gmail.com  Sat Sep 15 10:15:20 2007
From: brusstoc at gmail.com (brusstoc at gmail.com)
Date: Sat, 15 Sep 2007 14:15:20 -0000
Subject: Can You Program?
In-Reply-To: <1189679878.271415.88700@w3g2000hsg.googlegroups.com>
References: <1189679878.271415.88700@w3g2000hsg.googlegroups.com>
Message-ID: <1189865720.546424.155860@d55g2000hsg.googlegroups.com>

On Sep 13, 3:37 am, hats... at gmail.com wrote:
> We are offering $2000 USD for the best website developed withwww.hatspin.com
>
> Are you up to it??

Hey, thanks for spamming our group. Perhaps you should try again after
you learn proper HTML coding.
Results from http://validator.w3.org/ : Failed validation, 26 Errors

Really, really doubt that you are doing anything but trying to gather
e-mails. My 12 year old has made better sites.

Oh, and does jobslide.com know that you are linking to images on their
site? I'll be mentioning that to them, just so you know.

Please, put down the keyboard and step away from the computer......



From bj_666 at gmx.net  Sat Sep 22 17:24:39 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 22 Sep 2007 21:24:39 GMT
Subject: too many values with string.split
References: <mailman.931.1190494854.2658.python-list@python.org>
Message-ID: <5llfgnF8gic1U10@mid.uni-berlin.de>

On Sat, 22 Sep 2007 17:00:47 -0400, Shawn Minisall wrote:

> I'm trying to unpack a list of 5 floats from a list read from a file and 
> python is telling me 5 variables are too many for the string.split 
> statement.

Please post the *real* message which I suspect is something like 'too many
values to unpack', which is the other way around.  The 5 names are not
enough to take all the items from the split.

>     #read in data line by line
>     for line in infile:
>         mylist = string.split(line)

Functions in the `string` module that are also available as methods on
strings are deprecated.

>         firstName[counter] = mylist[0]
>         lastName[counter] = mylist[1]
>         grades[counter] = float(mylist[2])
>         print firstName[counter], 
> lastName[counter],":","\t\t",grades[counter]
>         #increment counter
>         counter = counter + 1

Do you really need the counter?  Can't you just append the values to the
lists?

>     #calculates and prints average score
>     grades = str(grades)
>     num1, num2, num3, num4, num5 = string.split(grades,",")
>     average = float(num1 + num2 + num3 + num4 + num5) / 5

This is very strange.  You have a list of floats (I guess), convert that
list to a string, split that string at commas, concatenate the *strings*
between commas and then try to convert it to a `float`!?  This is likely
not what you want and should fail in most cases anyway.

Ciao,
	Marc 'BlackJack' Rintsch


From dnhkng at googlemail.com  Sat Sep  8 11:59:41 2007
From: dnhkng at googlemail.com (Dr Mephesto)
Date: Sat, 08 Sep 2007 15:59:41 -0000
Subject: creating really big lists
In-Reply-To: <mailman.263.1189215250.2658.python-list@python.org>
References: <874pi92tr4.fsf@mulj.homelinux.net>
	<mailman.121.1189035929.2658.python-list@python.org>
	<1189057626.943757.210420@d55g2000hsg.googlegroups.com>
	<1189063849.118900.327540@22g2000hsm.googlegroups.com>
	<1189192606.119578.100820@r34g2000hsd.googlegroups.com>
	<mailman.263.1189215250.2658.python-list@python.org>
Message-ID: <1189267181.964313.302520@g4g2000hsf.googlegroups.com>

On Sep 8, 3:33 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Fri, 07 Sep 2007 16:16:46 -0300, Dr Mephesto <dnh... at googlemail.com>
> escribi?:
>
> > hey, that defaultdict thing looks pretty cool...
>
> > whats the overhead like for using a dictionary in python?
>
> Dictionaries are heavily optimized in Python. Access time is O(1),
> adding/removing elements is amortized O(1) (that is, constant time unless
> it has to grow/shrink some internal structures.)
>
> --
> Gabriel Genellina

well, I want to (maybe) have a dictionary where the value is a list of
5 lists. And I want to add a LOT of data to these lists. 10?s of
millions of pieces of data. Will this be a big problem? I can just try
it out in practice on monday too :)

thanks



From aboudouvas at panafonet.gr  Mon Sep  3 06:31:58 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: Mon, 03 Sep 2007 03:31:58 -0700
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
In-Reply-To: <87tzqc9jda.fsf@benfinney.id.au>
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<1188803759.498517.198900@g4g2000hsf.googlegroups.com>
	<87tzqc9jda.fsf@benfinney.id.au>
Message-ID: <1188815518.958139.17390@w3g2000hsg.googlegroups.com>

I was wondering (and maybe i still do) about this GIL "problem". I am
relatively new to Python (less than a year) and when i started to
think about it i said: "Oh, this IS a problem". But when i dig a
little more, i found that "Ah, maybe it isn't".
I strongly believe that the best usage of multiple cores processor
will be achieved if programming languages are modified to support this
on their "hearts". Code blocks that would be identified by the
compiler and run in parallel and such things. Laboratories are working
on these stuff but i do not expect something in the very-near future.

So, as i mentioned above, there are solutions for that right now
("parallel python" and others) that enabled us with little effort to
spawn a new python interpreter, thus allowing the OS to schedule it on
a different core and do the job this way relatively cheap.
I wouldn't recommend going to IronPython despite the fact that the CLR
better utilize MP. The reason for this is that i would NEVER give up
the freedom that CPython gives me by exchange "better" usage of the MP
and platform lock-in.



From paul.hankin at gmail.com  Wed Sep 26 07:23:39 2007
From: paul.hankin at gmail.com (Paul Hankin)
Date: Wed, 26 Sep 2007 11:23:39 -0000
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <87sl51lshd.fsf@mulj.homelinux.net>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>
	<1190753722.026806.254530@d55g2000hsg.googlegroups.com>
	<1190756003.292096.71130@o80g2000hse.googlegroups.com>
	<1190789981.385466.37870@57g2000hsv.googlegroups.com>
	<Xns99B760A3F5859duncanbooth@127.0.0.1>
	<87sl51lshd.fsf@mulj.homelinux.net>
Message-ID: <1190805819.406334.24730@k79g2000hse.googlegroups.com>

On Sep 26, 9:51 am, Hrvoje Niksic <hnik... at xemacs.org> wrote:
> Duncan Booth <duncan.bo... at invalid.invalid> writes:
> > I that's the point though: you can't write one implementation that has good
> > performance for all patterns of use
>
> An implementation of sorted dict using a balanced tree as the
> underlying data structure would give decent performance in all the
> mentioned use cases.  For example, red-black trees search, insert, and
> delete in O(log n) time.

But dicts do search, insert and delete in O(1) time, so using some
variety of balanced tree will give you much worse performance when
you're doing regular dict operations.

--
Paul Hankin



From db3l.net at gmail.com  Sat Sep  1 01:59:43 2007
From: db3l.net at gmail.com (David Bolen)
Date: Sat, 01 Sep 2007 01:59:43 -0400
Subject: HowTo Use Cython on a Windows XP Box?
References: <rO3Ci.32$453.27@trndny02>
	<1188618022.208258.15620@22g2000hsm.googlegroups.com>
	<1188623610.532790.114000@o80g2000hse.googlegroups.com>
	<oO6Ci.603$J96.503@trnddc02>
Message-ID: <m27inbdiy8.fsf@valheru.db3l.homeip.net>

David Lees <debl2NoSpam at verizon.net> writes:

> Yes, you are correct in understanding my question.  I thought my post
> was clear, but I guess not.  I will go try the pyrex list.

You might also try looking for references to distutils support for
non-MS compilers, since Pyrex (and presumably Cython) uses distutils
under the covers to build the final extension.  I'm pretty sure there
is support in recent Python releases for using mingw rather than MSVC
for most extensions (there may be problems with using certain Python
APIs that depending on specific C RTL structures like files).

As to using VC, yes, it does have to be VC 7.1, e.g,. Visual Studio
2003.  You can't use 2005, as MS didn't maintain runtime
compatibility.  I'm sure there are a number of threads about that also
available.  If I recall correctly, VC 7.1 began to be used in the 2.4
timeframe - although it was getting discussed back when 2.3 was
getting released, based on an offer Microsoft had made to provide
copies to core developers.  The discussions are archived, but VC 6 was
definitely long in the tooth at that point.  As the development tools
aren't free, they haven't been upgraded past that point to date.  It's
unfortunate that when MS changed the main runtime DLL with VC 7 (for
the first time in a pretty long time), that they then did so
immediately again (and incompatibly) with VC 8.

At the time, there were also efforts with some success to use the free
toolkit MS made available (although I think it was sans optimizer),
but then I think that got pulled and/or it became more difficult to
find/use, but my memory is fuzzy.

You mention having VS 2005 - if so, do you also have an MSDN
subscription?  I believe you should still be able to get VS 2003 via
that route if you first started with 2005 and thus never had 2003.  If
not, the mingw approach may be your best bet.

-- David


From cjw at sympatico.ca  Mon Sep 17 20:57:20 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Mon, 17 Sep 2007 20:57:20 -0400
Subject: Why 'class spam(object)' instead of class spam(Object)' ?
In-Reply-To: <fbs1id$acq$1@sea.gmane.org>
References: <mailman.205.1189146609.2658.python-list@python.org>	<46e10916$0$16518$4c368faf@roadrunner.com>
	<fbs1id$acq$1@sea.gmane.org>
Message-ID: <46EF2270.6080000@sympatico.ca>

Steve Holden wrote:
> Carl Banks wrote:
>> On Fri, 07 Sep 2007 01:30:00 -0500, Sergio Correia wrote:
>>> Hi, I'm kinda new to Python (that means, I'm a total noob here), but
>>> have one doubt which is more about consistency that anything else.
>>>
>>> Why if PEP 8 says that "Almost without exception, class names use the
>>> CapWords convention", does the most basic class, object, is lowercase?
>> It said "almost".  :)
>>
> Indeed it did, and never forget that most of PEP 8 was derived from an 
> essay by Guido whose original title was "A Foolish Consistency is the 
> Hobgoblin of Little Minds" ...
>>> I found a thread about this:
>>> http://mail.python.org/pipermail/python-list/2007-April/437365.html
>>> where its stated that -object- is actually a type, not a class; but the
>>> idea still doesn't convince me.
> You don't have to be convinced. You just have to do what the PEP says 
> yourself and ignore the people who *haven't* done what it says 
> (particularly if they are core Python developers).
> 
>> There's a false dichotomy there: it's not an either-or situation.  Almost 
>> everyone would agree that new-style classes, defined by the Python class 
>> statement, are both classes and types.  Some might squabble over whether 
>> object is class, but it has nothing to do with why object is spelled in 
>> lower-case.
>>
>> The reason why "object" is lower case is because built-in types are 
>> spelled in lower-case.  Why are built-in types lower case?  Because many 
>> built-in types were originially functions.  For example, "int" and "str" 
>> were once functions.  When these symbols became the names of their 
>> respective types, they kept the lower-case spelling, and it became 
>> convention for built-in types to be spelled lower-case.
>>
> In other words: "Get over it" ;-)
> 
> regards
>   Steve
Surely Python 3000 gives the opportunity to introduce some consistency.

Does the user care whether an object is implemented in C?

Colin W.



From koutoo at hotmail.com  Tue Sep 18 14:58:16 2007
From: koutoo at hotmail.com (koutoo at hotmail.com)
Date: Tue, 18 Sep 2007 11:58:16 -0700
Subject: Newbie question
In-Reply-To: <mailman.733.1190140956.2658.python-list@python.org>
References: <1190139661.046103.45440@19g2000hsx.googlegroups.com>
	<mailman.732.1190140272.2658.python-list@python.org>
	<1190140395.567419.16280@k79g2000hse.googlegroups.com>
	<mailman.733.1190140956.2658.python-list@python.org>
Message-ID: <1190141896.085799.295110@57g2000hsv.googlegroups.com>

On Sep 18, 1:42 pm, "Shawn Milochik" <Sh... at Milochik.com> wrote:
> On 9/18/07, kou... at hotmail.com <kou... at hotmail.com> wrote:
>
>
>
>
>
> > On Sep 18, 1:31 pm, "Shawn Milochik" <Sh... at Milochik.com> wrote:
> > > On 9/18/07, kou... at hotmail.com <kou... at hotmail.com> wrote:
>
> > > > If I have a file name: AVC1030708.14.  How do I strip out certain
> > > > characters from the file name?  I am so used to using MID, LEFT, and
> > > > RIGHT functions, that I have no idea how to do this in python?  I have
> > > > had trouble as well with most newbies on finding the help.  But I have
> > > > used the command line built in help, but with no luck.  Thanks.
>
> > > > Kou
>
> > > Do you want to strip out specific characters, characters in specific
> > > positions, or characters matching certain patterns?
>
> > Yes, I want specific characters in specific positions.
>
> Try this:
>
> newString = oldString[0:3] + oldString[5:10]
>
> Some other quick examples:
>
> >>> test = "this is a test"
> >>> test
> 'this is a test'
> >>> fred = test[:3] + test[9:]
> >>> fred
> 'thi test'
> >>> test[0:5]
> 'this '
> >>> test[:5]
> 'this '
> >>> test[4:]
>
> ' is a test'- Hide quoted text -
>
> - Show quoted text -

I see.  It's so hard to imagine the world of python than from VB.
It's like looking at VB is in 2 dimensions, where with Python, it's
more 3D.  The code is so simple, yet it's hard for me to envision how
to do something so simple.  I guess it's because the rules or the way
of looking at things in Python, things can be stripped down to the
bare bones and in so many ways.  Thanks.

Kou



From carsten at uniqsys.com  Fri Sep  7 09:11:30 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 07 Sep 2007 09:11:30 -0400
Subject: MySQLdb: ValueError Something Stupid
In-Reply-To: <1189169527.020589.185120@w3g2000hsg.googlegroups.com>
References: <1189163332.990248.134080@d55g2000hsg.googlegroups.com>
	<1189169527.020589.185120@w3g2000hsg.googlegroups.com>
Message-ID: <1189170690.3367.30.camel@dot.uniqsys.com>

On Fri, 2007-09-07 at 05:52 -0700, mcl wrote:
> > ValueError: invalid literal for int(): 0-
> >       args = ('invalid literal for int(): 0-',)
> >
> > =========================================
> > Thanks Richard
> 
> Sort of solved it.
> 
> On that particular table it did not like * for all fields.
> 
> Any reason why that would be the case ?

None that we can divine without more information. What's the schema for
the table in question, which column(s) are you excluding to make the
query work, and what kind of data is in the column(s) you're excluding?

-- 
Carsten Haese
http://informixdb.sourceforge.net




From yosuke at ccwf.cc.utexas.edu  Mon Sep  3 22:51:10 2007
From: yosuke at ccwf.cc.utexas.edu (yosuke at ccwf.cc.utexas.edu)
Date: Tue, 4 Sep 2007 02:51:10 +0000 (UTC)
Subject: trap setting attribute when the attribute is dict
References: <fbhi38$3rg$1@geraldo.cc.utexas.edu>
	<1188845236.417709.307160@50g2000hsm.googlegroups.com>
	<fbhodb$5uv$1@geraldo.cc.utexas.edu>
	<1188864653.854065.80100@g4g2000hsf.googlegroups.com>
Message-ID: <fbih6u$e87$1@geraldo.cc.utexas.edu>

John Machin <sjmachin at lexicon.net> wrote:
> On Sep 4, 5:47 am, <yos... at ccwf.cc.utexas.edu> wrote:
>> Arnaud Delobelle <arno... at googlemail.com> wrote:
>> > On Sep 3, 7:00 pm, <yos... at ccwf.cc.utexas.edu> wrote:
>>
>> >> I want to do something like this.  My class/instance has a dict as a
>> >> property.  I want the instance to catch the change in the dict (change
>> >> in some values, addition/deletion of key/value etc) to be recognized by
>> >> the class instance.
>>
>> >> How can I do this?  Any suggestions are very well appreciated.
>>

[snip]

>>
>> Thank you for suggestion, Arnaud.
>>
>> Since you are discouraging this idea of trigger, may I ask an advice of
>> if my intention was legitimate one or not?
>>
>> My intention was to have a propery 'sum' in my object, and which has sum
>> of all the values() of the dict (i have code to make sure that the value
>> of dict are all numeric).  I could just the propery being calculated
>> everytime the property got __getattr__.  But I thought that it was
>> inefficient to calculate the same number over and over when the value is
>> already known.  So I was thiking of calculating the number only when the
>> dict got modified.
>>
>> I also experimented with the idea of subclassing dict itself to
>> calculate the sum.  Is this what would be better solution?
>>

> And what's wrong with calculating the value when you need it ...

> def thedictsum(self):
>     return sum(self.thedict.itervalues())

> How big will the dict be, how often will it be updated, how often will
> the sum be required?

> Have you done timings of any of the options?

Thank you for the post.

I want the code to have fewer lines of code.  That was my biggest
motivation for this.  I have many of this dict with sum, each have <1000
elements.  all of them share the same keys.  I do many
addition/subtraction/divisions by each elements (yes, division makes the
elements not being able to summed).  so in my code i have repeated lines
that works on each elements and then on the sum.  i made a dict to take
care of adding elements by elements.  but i still had two lines of code,
one for dict elements, and one for the sum.

my code was originally in fortran and it has like thousands of lines,
obscuring the mathematics that i want to do.  i need to modify math
often while i use the code (i dont know exactly what math i will need at
this point), so i want to the code to be able to show the math
clearly.  ideally i want to this to be somthing like

c = a + b
d = 1 / c

and each of a, b, c, d knows how to operates on each elements, and also
keep track of the sum.

I think i will settle for extending dict to have sum property and keep
track of it .





> You say you have code to check that the values are numeric; why not
> put this together with maintenance of the sum into a method which
> clients must use to update the dict?

> BTW, my motto:

> "__" == "Danger, Will Robinson!" == "Wrong way, go back" :-)


not quite getting this....  :(

> HTH,
> John


-- 
yosuke kimura
Center for Energy and Environmental Resources
The Univ. of Texas at Austin, USA


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Sep 21 05:04:07 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 21 Sep 2007 11:04:07 +0200
Subject: Python 3K or Python 2.9?
In-Reply-To: <mailman.857.1190359937.2658.python-list@python.org>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>	<46e7974d$0$31726$426a74cc@news.free.fr>	<fc8fc9$4qa$1@news2.carnet.hr>	<5kq1hgF4r90oU1@mid.individual.net>	<1189618530.872819.136450@57g2000hsv.googlegroups.com>	<uir6ctto7.fsf@yahoo.com>	<1190013827.107324.111820@w3g2000hsg.googlegroups.com>	<mailman.645.1190026962.2658.python-list@python.org>	<1190053757.091035.221570@22g2000hsm.googlegroups.com>
	<mailman.857.1190359937.2658.python-list@python.org>
Message-ID: <46f38907$0$27686$426a74cc@news.free.fr>

Ron Adam a ?crit :
> 
> 
> TheFlyingDutchman wrote:
> 
>> I am not talking about the way it does it, but rather, the way it
>> could do it or... could have done it. That requires no knowledge of
>> how the interpreter currently does it unless I am proposing something
>> that no interpreter in the world could ever do.
> 
(snip)
> So if you can find a way to do things like removing self in python in 
> such a way that it doesn't require adding more to the Core interpreter, 
> then it might be considered.

By who ? As far as I'm concerned, I don't want 'self' to be removed, and 
I'm probably not the only one here.

> 
> What I've found is as my skills improve, I take more advantage of being 
> able to modify and/or introspect how things work.  This allows more 
> choices on how I might solve a particular problem.

The changes required by removing self would make most of this either 
painfull or near impossible AFAICT.

> I also think there a lots of improvements that could be made to other 
> parts of python such as the libraries that would be of much more 
> practical benefit.

indeed.



From fredrik at pythonware.com  Thu Sep 27 11:44:53 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 27 Sep 2007 17:44:53 +0200
Subject: setuptools without unexpected downloads
In-Reply-To: <1190840682.716950.131830@r29g2000hsg.googlegroups.com>
References: <87ejgmklep.fsf@benfinney.id.au><5lumarFae888U1@mid.uni-berlin.de>	<1190802526.695391.326220@n39g2000hsh.googlegroups.com>	<5lurorFa92euU1@mid.uni-berlin.de>	<1190805012.275901.227570@57g2000hsv.googlegroups.com>	<5luv0iFaai82U1@mid.uni-berlin.de>	<1190808836.056298.232640@57g2000hsv.googlegroups.com>	<fddivk$f90$1@sea.gmane.org>	<mailman.1111.1190813942.2658.python-list@python.org>
	<1190840682.716950.131830@r29g2000hsg.googlegroups.com>
Message-ID: <fdgj5m$853$1@sea.gmane.org>

kyosohma at gmail.com wrote:

> What would it entail to do this? Using py2exe + some installer (like
> Inno Setup) to create an installer that basically copies/installs the
> files into the site-packages folder or wherever the user chooses?

if the setup.py file is properly built, "python setup.py bdist_wininst"
builds an installer that does exactly that.

ideally, someone doing this would:

1) build EXE installers and EGG:s for a reasonable number of Python 
versions (e.g. 2.3 and newer) for selected releases.  if possible, using 
the same compilers as used for the python.org core distribution.

2) test the installers in some way (at least some kind of "sanity
checking" is necessary; i.e. installing the kit and checking that the 
core modules can at least be imported).

3) if necessary, work with upstream providers to fix/improve setup.py 
and test code.

</F>



From sbassi at clubdelarazon.org  Wed Sep 12 00:33:18 2007
From: sbassi at clubdelarazon.org (Sebastian Bassi)
Date: Wed, 12 Sep 2007 01:33:18 -0300
Subject: Generating HTML
Message-ID: <9e2f512b0709112133l41ce5ef1g815962a81becf6b9@mail.gmail.com>

Hello,

What are people using these days to generate HTML? I still use
HTMLgen, but I want to know if there are new options. I don't
want/need a web-framework a la Zope, just want to produce valid HTML
from Python.
Best,
SB.

-- 
Sebasti?n Bassi (???????). Diplomado en Ciencia y Tecnolog?a.
Curso Biologia molecular para programadores: http://tinyurl.com/2vv8w6
GPG Fingerprint: 9470 0980 620D ABFC BE63 A4A4 A3DE C97D 8422 D43D

From pavlovevidence at gmail.com  Sat Sep 15 00:58:26 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sat, 15 Sep 2007 00:58:26 -0400
Subject: An ordered dictionary for the Python library?
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<7xzlzrtrjn.fsf@ruckus.brouhaha.com>
	<1189664832.876539.86800@k79g2000hse.googlegroups.com>
	<fcc5lt$ish$1@daisy.noc.ucla.edu>
	<1189733785.813953.77370@k79g2000hse.googlegroups.com>
	<fccqq4$34d$1@daisy.noc.ucla.edu>
Message-ID: <46eb6ad1$1$7493$4c368faf@roadrunner.com>

On Thu, 13 Sep 2007 19:21:08 -0700, James Stroud wrote:

> Carl Banks wrote:
>> On Sep 13, 4:20 pm, James Stroud <jstr... at mbi.ucla.edu> wrote:
>>> Mark Summerfield wrote:
>>>> - If an item is inserted it is put in the right place (because the
>>>> underlying data structure, b*tree, skiplist or whatever is
>>>> intrinsically ordered by < on the key)
>>> +1 for all your suggestions below, but -1 for the above. You suggest
>>> that
>>>
>>>    myOrderedDict['key'] = value
>>>
>>> would place it in the dictionary in sorted order depending on 'key'.
>>> More natural to some of us (or maybe its just me) would be to append
>>> the key/value pair to the end of items.
>> 
>> Or, maybe, like, you know, you could have two different types that
>> maintain two different orders?
>> 
>> 
> Do you mean, like, a SortedDict and an OrderedDict like I mentioned in
> the post you are replying to?


Like, you know, maybe I should read the whole article I reply to.


*sigh*


Carl Banks


From fakeaddress at nowhere.org  Sun Sep  9 02:42:27 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Sat, 08 Sep 2007 23:42:27 -0700
Subject: Does shuffle() produce uniform result ?
In-Reply-To: <7xhcm4pl5m.fsf@ruckus.brouhaha.com>
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
	<mailman.243.1187955760.32294.python-list@python.org>
	<tooru_honda-7C82D1.10432725082007@wvnews01.netvigator.com>
	<tooru_honda-58C552.20355225082007@wvnews01.netvigator.com>
	<tooru_honda-978B9E.11304526082007@wvnews01.netvigator.com>
	<slrnfdnojg.inr.apardon@rcpc42.vub.ac.be>
	<7xejhfbsjo.fsf@ruckus.brouhaha.com>
	<slrnfdpup6.inr.apardon@rcpc42.vub.ac.be>
	<7xabs39bin.fsf@ruckus.brouhaha.com>
	<13drijhfqlvlk96@corp.supernews.com> <fbvmg0$1p3$3@lust.ihug.co.nz>
	<7xhcm4pl5m.fsf@ruckus.brouhaha.com>
Message-ID: <cBMEi.2652$3Y1.1934@newssvr17.news.prodigy.net>

Paul Rubin wrote:
> Lawrence D'Oliveiro writes:
>> Except that the NSA's reputation has taken a dent since they failed to
>> anticipate the attacks on MD5 and SHA-1.
> 
> NSA had nothing to do with MD5, and it's to NSA's credit that SHA-1
> held up for as long as it did.

I haven't kept up. Has anyone exhibited a SHA-1 collision?


-- 
--Bryan


From bignose+hates-spam at benfinney.id.au  Tue Sep 25 20:16:13 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 26 Sep 2007 10:16:13 +1000
Subject: Test-driven development and code size (was: What is a good way of
	having several versions of a python module installed in parallell?)
References: <fdai0b$7iv$1@news.lysator.liu.se>
	<5ls95aF9pq3gU1@mid.uni-berlin.de>
	<mailman.1054.1190736712.2658.python-list@python.org>
	<fdborn$h5q$1@news.lysator.liu.se>
Message-ID: <87ejgmmgc2.fsf_-_@benfinney.id.au>

Joel Hedlund <joel.hedlund at gmail.com> writes:

> Do you also do [test-driven development] for all the little stuff,
> the small hacks you just whip together to get a particular task
> done? My impression is that doing proper unittests adds a lot of
> time to development, and I'm thinking that this may be a low return
> investment for the small programs.

My impression is that failing to have reliable code adds a lot of time
to debugging and maintenance, and it is far cheaper to have tested and
flushed out the obvious bugs early in the development process.

> I try to aim for reusability and generalizability also in my smaller
> hacks mainly as a safeguard.

In which case, you will be maintaining that code beyond the initial
use for which you thought it up. Maintaining code without unit tests
is far more costly than maintaining code with tests, because you have
no regression test suite: you are prone to chasing down bugs that you
though you'd fixed in an earlier version of the code, but can't figure
out when you broke it again. This time is entirely wasted.

Instead, in code that has unit tests, a bug found means another unit
test to be added (to find and demonstrate that bug). This is work you
must do anyway, to be sure that you can actually reproduce the bug;
test-driven development merely means that you take that test case and
*keep it* in your unit test. Then, once you're assured that you will
find the bug again any time it reappears, go ahead and fix it.

> My reasoning here is that if I mess up somehow, sooner or later I'll
> notice

With test-driven development I get much closer to the "sooner" end of
that, and much more reliably.

> Maybe I should be rethinking this?

That's my opinion, yes.

-- 
 \         "My mother was like a sister to me, only we didn't have sex |
  `\                                  quite so often."  -- Emo Philips |
_o__)                                                                  |
Ben Finney


From paul at boddie.org.uk  Wed Sep 26 07:10:12 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Wed, 26 Sep 2007 04:10:12 -0700
Subject: setuptools without unexpected downloads
In-Reply-To: <5lurorFa92euU1@mid.uni-berlin.de>
References: <87ejgmklep.fsf@benfinney.id.au><5luhb0Faal8aU1@mid.uni-berlin.de>
	<874phhlupi.fsf@benfinney.id.au> <5lumarFae888U1@mid.uni-berlin.de>
	<1190802526.695391.326220@n39g2000hsh.googlegroups.com>
	<5lurorFa92euU1@mid.uni-berlin.de>
Message-ID: <1190805012.275901.227570@57g2000hsv.googlegroups.com>

On 26 Sep, 12:48, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>

[Quoting me...]

> > However, the argument that a dependency manager cannot deal with
> > different system packages is a weak one: apt and Smart have shown that
> > dependency management can be decoupled from package management.
>
> Do you care to elaborate on how apt has shown that? I use it every day (or
> at least often), but I have to admit I never delved to deeply into them -
> to me it appears that apt is a retrieval-solution, not so much a dependency
> management system. The dependencies are declared in the debs themselves,
> used by dpkg-* - aren't they? Sure, apt does solve them, but how so
> decoupled from the underlying .deps?

Perhaps I was thinking more about the whole apt vs. apt-rpm situation,
since apt-rpm supposedly works with RPMs, albeit in a different
distribution of the software.

> Regarding smart: what I read here
>
> """
> Smart is not meant as an universal wrapper around different package formats.
> It does support RPM, DEB and Slackware packages on a single system, but
> won't permit relationships among different package managers. While
> cross-packaging system dependencies could be enabled easily, the packaging
> policies simply do not exist today.
> This is not at all different from what you can already do. In fact, Debian
> has been shipping the RPM package manager for a few years now. "Possible"
> does not equal "good idea", and everybody should stick to their native
> package format.
> """
>
> in the FAQ doesn't make me think that it's just a matter of unwillingness
> from the setuptools-people but instead an intrinsic property of
> dependency-handling that makes cross-package-management-management (or
> meta-management) hard.

I think the argument is that you use your own system's package format,
but smart is supposed to resolve the dependencies expressed in the
packages itself. There are also universal package formats, but I think
these usually leave some people disappointed, partly because you then
have to consider all the different dependency representations and the
inevitable integration with genuine system packages. I guess this is
why dependency issues were left underspecified in the PEP.

> Apart from the technical intricacies of .deb/.rpm and their respective
> tools, on thing sure makes this an argument: THEY evolve as they like, and
> it sure puts a lot of additional burden to the setuptools-guys to keep
> track with that.

I think most of the evolution has been in the surrounding tools,
although stuff like the new Debian Python policy could be complicating
factors. But I don't think the dependency stuff has changed that much
over the years.

[...]

> >> For example - what if there is no debian package that provides module XY
> >> in the required version? Do you rather install it into the global
> >> site-packages, or do you rather keep it private to the program requiring
> >> it? I'd say the latter is better in mostly all circumstances, as it will
> >> not disrupt the workings of other programs/modules.

[http://www.boddie.org.uk/paul/userinstall.html]

> Certainly a nice solution to a real problem that might be handy for me at
> some time. Yet I fail to see how that relates to the above question: if the
> OS package repository fails to meet a certain version requirement, how do
> you deal with that - installation local to the product you're actually
> interested in installing, or in a more public way that possibly interferes
> with other software?

My response here was mostly addressing the "global site-packages"
issue since that's usually a big reason for people abandoning the
system package/dependency management. If you can't find a new-enough
system package, you have to either choose a local "from source"
installation (which I would regard as a temporary measure for reasons
given elsewhere with respect to maintenance), or to choose to
repackage the upstream code and then install it through the system
package manager, which I claim can be achieved in a non-global
fashion.

Paul



From martin at v.loewis.de  Sat Sep  1 11:41:20 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 01 Sep 2007 17:41:20 +0200
Subject: How to find out if the interpreter is a debug build?
In-Reply-To: <1188654173.615402.190960@19g2000hsx.googlegroups.com>
References: <1188609417.273513.74450@i13g2000prf.googlegroups.com>
	<46d905d5$0$26151$9b622d9e@news.freenet.de>
	<1188643450.431001.219220@o80g2000hse.googlegroups.com>
	<46d95d5a$0$9015$9b622d9e@news.freenet.de>
	<1188654173.615402.190960@19g2000hsx.googlegroups.com>
Message-ID: <46d98820$0$23700$9b622d9e@news.freenet.de>

> Would such a patch require a full blown PEP?

No.

> If i have to write a PEP i can better add it to the documentation of
> my application and be sure that the problem is solved.

I don't understand. Are you saying you would rather not write a PEP,
and add something to the documentation of your application instead?
If that solves your problem, go for it!

> A patch might
> be rejected by anybody in a bad mood or who don't understand why it is
> usefull.

That's true.

Martin


From joshua at eeinternet.com  Thu Sep 20 15:45:13 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Thu, 20 Sep 2007 11:45:13 -0800
Subject: A struct for 2.4 that supports float's inf and nan?
References: <mailman.784.1190235594.2658.python-list@python.org>
	<1190315989.268629.37520@22g2000hsm.googlegroups.com>
Message-ID: <fcuik9$nj9$1@sea.gmane.org>

On Thursday 20 September 2007 11:19, Paul Hankin wrote:

>> I suppose I could get the relevant source from the 2.5 source and compile
>> it as a custom package, but that wouldn't be very transparent for my
>> users, and would probably be getting in way over my head. :)
>>
>> Ideas?  Suggestions?
> 
> Here's a wrapped pack:
> 
> import struct
> 
> pack_double_workaround = {
>   'inf': struct.pack('Q', 0x7ff0000000000000L),
>   '-inf': struct.pack('Q', 0xfff0000000000000L),
>   'nan': struct.pack('Q', 0x7ff8000000000000L)
> }
> 
> def pack_one_safe(f, a):
>   if f == 'd' and str(f) in pack_double_workaround:
>       return pack_double_workaround[str(f)]
>   return struct.pack(f, a)
> 
> def pack(fmt, *args):
>   return ''.join(pack_one_safe(f, a) for f, a in zip(fmt, args))
> 
> Unpacking is similar: unpack doubles with 'Q' and test the
> long for equality with +-inf, and find nan's by checking bits
> 52 to 62. If the number's ok, unpack again using 'd'.
> 
> You can get python values for nan, -inf and inf by using
> float('nan'), float('-inf'), float('inf').
> 
> I've not been able to properly test this, as struct seems
> to work fine in Python 2.3 and 2.4 on MacOS X.

Thanks for the ideas, Paul!  I came up with something that works for me, but
this has a few ideas that I'm going to implement in my wrapper to make for
cleaner code.

As to testing it on MacOS X: yeah, it can be a somewhat system-dependent
problem, so may not show up on all architectures.

Thanks for the tips!

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE



From tjreedy at udel.edu  Fri Sep  7 20:45:15 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 7 Sep 2007 20:45:15 -0400
Subject: Speed of Python
References: <1189185542.798286.168880@50g2000hsm.googlegroups.com>
	<BAY122-F37CD62BB3682998CD2C45AB4C50@phx.gbl>
Message-ID: <fbsrat$mfo$1@sea.gmane.org>


"wang frank" <fw3 at hotmail.co.jp> wrote in message 
news:BAY122-F37CD62BB3682998CD2C45AB4C50 at phx.gbl...
|        z=log(j);

This matlab code is faster in part than your Python equivalent:

| > >                         z=math.log(m)

because of the repeated lookup of log in the math module.
So, replace

| > > import math

with

from math import log

Also make that the top line of the function so 'log' is a local variable. 
Then delete 'math.' everywhere.

That said, such artificial benchmarks do not strike me as terribly useful. 
More useful, for instance, for appropriate applications, might be doing a 
fourier transform on a 2**20 length vector with both matlab and numpy/scipy

tjr





From bignose+hates-spam at benfinney.id.au  Tue Sep 18 19:15:47 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 19 Sep 2007 09:15:47 +1000
Subject: newbie: self.member syntax seems /really/ annoying
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189604018.520338.162520@57g2000hsv.googlegroups.com>
	<740c3aec0709130730k2226e9abmbf5defb579b77660@mail.gmail.com>
	<mailman.707.1190116115.2658.python-list@python.org>
Message-ID: <87wsuny38c.fsf@benfinney.id.au>

"Colin J. Williams" <cjw at sympatico.ca> writes:

> .rect.width = .foo(.rect.x + .rect.y) * .boo()
> 
> Does this preceding "." create parsing problems?

Perhaps not for the computer, but certainly for the human. A leading
"." is far too easy to miss when visually scanning the code, and fails
the "explicit" principle.

-- 
 \        "I have the simplest tastes.  I am always satisfied with the |
  `\                                            best."  -- Oscar Wilde |
_o__)                                                                  |
Ben Finney


From tim.couper at scivisum.co.uk  Tue Sep  4 08:36:05 2007
From: tim.couper at scivisum.co.uk (Tim Couper)
Date: Tue, 04 Sep 2007 13:36:05 +0100
Subject: Setting Current Dir in Python
In-Reply-To: <000001c7eeec$d9341470$8b9c3d50$@net>
References: <000001c7eeec$d9341470$8b9c3d50$@net>
Message-ID: <46DD5135.7060501@scivisum.co.uk>

"Non-ASCII character '\xef' in file"

SandhirFileMonitor.py on line 356, 

This is reason for the failure .. you have a (probably accidentally placed) non-ascii (ie whose value is > 128) character on line 356, whose hex value is ef (decimal 259) . Solution: find that line and remove the character - or line.

Tim

Dr Tim Couper
CTO, SciVisum Ltd

www.scivisum.com



Sandipan Gangopadhyay wrote:
> Hi all!
>
> I have utility programs in Python that do clean up, image processing tasks
> on files in a folder. I just drop the program into the folder and run it.
>
> I have been double clicking on a Python program in my Windows XP Home to
> make it run . it sets the program's directory as the current directory when
> it runs.
>
> I have recently installed Python 2.5.1 and Pythonwin (without any errors) on
> Windows Vista Ultimate.
>
> Now, the programs run fine within Pythonwin IDE when current directory is
> set to the program's directory.
>
> But, when I double click them from Windows Explorer, the program is not run.
>
> If I run the following program:
>
> ============================================================================
> ===============
> # MODULE IMPORT
> try:
>     import time, os, Image, urllib, string, math, os.path, filecmp, shutil,
> sys
> except:
>     strInput = raw_input("Failed import. Hit enter key to continue.")
>     pass
>
> # FIGURE OUT CURR DIR
> try:
>     print "CURENT = %s" % os.listdir(".")
>     print "PARENT = %s" % os.listdir("..")
>     print "ABS PATH = %s" % os.path.abspath(".")
>     print "CURENT = %s" % os.listdir(os.curdir)
>     print "PARENT = %s" % os.listdir(os.pardir)
> except:
>     strInput = raw_input("Failed os module calls. Hit enter key to end.")
>     pass
>
> print
> strInput = raw_input("Hit enter key to end program")
>
> Through Pythonwin IDE without setting the directory (using Open, or Save
> As), I get:
>
> ============================================================================
> ===============
> CURENT = ['addins', 'AppPatch', 'assembly', 'atl80.dll',  . - snip - . ,
> 'winsxs', 'WMSysPr9.prx', 'xpsp1hfm.log', '_default.pif']
> PARENT = ['$Recycle.Bin', 'autoexec.bat', 'Boot', 'bootmgr', 'BOOTSECT.BAK',
> 'config.sys', 'Documents and Settings', . - snip - . , 'Program Files',
> 'ProgramData', 'Python25', . - snip - . , 'System Volume Information',
> 'temp', 'Users', 'Windows']
> ABS PATH = C:\Windows
> CURENT = ['addins', 'AppPatch', 'assembly', 'atl80.dll', . - snip - ., ,
> 'winsxs', 'WMSysPr9.prx', 'xpsp1hfm.log', '_default.pif']
> PARENT = ['$Recycle.Bin', 'autoexec.bat', 'Boot', 'bootmgr', 'BOOTSECT.BAK',
> 'config.sys', 'Documents and Settings', . - snip - . , 'Program Files',
> 'ProgramData', 'Python25', . - snip - . , 'System Volume Information',
> 'temp', 'Users', 'Windows']
>
> If I run it using double click on the program through Windows Explorer, I
> get:
>
> ============================================================================
> ===============
> Nothing . the window closes immediately. Despite the except catches.
>
> If I run it from a Command Prompt, by first navigating to the program's
> directory and then specifying [ python.exe SandhirFileMonitor.py ], I get:
>
> ============================================================================
> ===============
> sys:1: DeprecationWarning: Non-ASCII character '\xef' in file
> SandhirFileMonitor.py on line 356, but no encoding declared; see
> http://www.python.org/peps/pep-0263.html for details
> Failed import. Hit enter key to continue.
> CURENT = ['Diff.txt', 'Folder2', 'report-templates', 'reports - Copy
> (2).html','reports - Copy (3).html', 'reports - Copy (4).html', 'reports -
> Copy (5).html', 'reports - Copy.html', 'reports.html',
> 'SandhirFileBackupUtility - Copy.py', 'SandhirFileBackupUtility.py',
> SandhirFileBackupUtility.py - Shortcut.lnk', 'SandhirFileMonitor.py']
> PARENT = ['BackupV10', 'BackupV11', 'DayReadiness', 'reporterV70']
> ABS PATH =
> E:\Data\ActiveData\SandipanPersonalData\FromNODE06\SoftwareBackups\BackupV11
> CURENT = ['Diff.txt', 'Folder2', 'report-templates', 'reports - Copy
> (2).html', 'reports - Copy (3).html', 'reports - Copy (4).html', 'reports -
> Copy (5).html', 'reports - Copy.html', 'reports.html',
> 'SandhirFileBackupUtility - Copy.py', 'SandhirFileBackupUtility.py',
> 'SandhirFileBackupUtility.py - Shortcut.lnk', 'SandhirFileMonitor.py']
> PARENT = ['BackupV10', 'BackupV11', 'DayReadiness', 'reporterV70']
>
> I am obviously missing something very simple, but I can't figure this out .
> it's been a few days now.
>
> Can someone help? Thanks.
>
> Sandipan
>
>
>   


From andre.roberge at gmail.com  Fri Sep  7 15:13:41 2007
From: andre.roberge at gmail.com (=?iso-8859-1?B?QW5kcuk=?=)
Date: Fri, 07 Sep 2007 19:13:41 -0000
Subject: Is a Borg rebellion possible? (a metaclass question)
In-Reply-To: <mailman.244.1189191248.2658.python-list@python.org>
References: <1189168282.665210.260840@19g2000hsx.googlegroups.com>
	<mailman.220.1189171663.2658.python-list@python.org>
	<1189180478.257790.60160@g4g2000hsf.googlegroups.com>
	<mailman.244.1189191248.2658.python-list@python.org>
Message-ID: <1189192421.638450.266050@22g2000hsm.googlegroups.com>

On Sep 7, 3:53 pm, Steve Holden <st... at holdenweb.com> wrote:
> Andr? wrote:
> > On Sep 7, 10:27 am, Carsten Haese <cars... at uniqsys.com> wrote:
> >> On Fri, 2007-09-07 at 12:31 +0000, Andr? wrote:
> >>> In my application, I make use of the Borg idiom, invented by Alex
> >>> Martelli.
> >>> class Borg(object):
> >>>     '''Borg Idiom, from the Python Cookbook, 2nd Edition, p:273
> >>>     Derive a class form this; all instances of that class will share
> >>> the
> >>>     same state, provided that they don't override __new__; otherwise,
> >>>     remember to use Borg.__new__ within the overriden class.
> >>>     '''
> >>>     _shared_state = {}
> >>>     def __new__(cls, *a, **k):
> >>>         obj = object.__new__(cls, *a, **k)
> >>>         obj.__dict__ = cls._shared_state
> >>>         return obj
> >>> ----
> >>> This has worked very well so far, but is starting to impose some
> >>> unwanted constraints on my program design.
> >>> What I would like to do is, to put it figuratively, create a Borg
> >>> rebellion with various splinter groups.  In concrete Python terms, I
> >>> would like to have
> >>> class MyClass(Borg, ...):
> >>>    ...
> >>> seven_of_nine = MyClass(...)  # part of group "BORG"
> >>> two_of_nine = MyClass(...)
> >>> splinter1 = MyClass(..., group='splinter')
> >>> splinter2 = MyClass(..., group='splinter')
> >>> and have splinter 1 and splinter2 share the same state, but a
> >>> different state than the one shared by members of the BORG collective.
> >>> Any suggestions from the metaclass experts?
> >> You don't need a metaclass. Just turn _shared_state into a dictionary of
> >> shared states, keyed by the group name:
>
> >> class SplinterBorg(object):
> >>     _shared_states = {}
> >>     def __new__(cls, *a, **k):
> >>         group = k.pop("group","BORG")
> >>         obj = object.__new__(cls, *a, **k)
> >>         obj.__dict__ = cls._shared_states.setdefault(group,{})
> >>         return obj
>
> >> HTH,
>
> >> --
> >> Carsten Haesehttp://informixdb.sourceforge.net
>
> > Unfortunately, it fails.  Here's what I tried, followed by the
> > traceback
> > class SplinterBorg(object):
> >     _shared_states = {}
> >     def __new__(cls, *a, **k):
> >         group = k.pop("group","BORG")
> >         obj = object.__new__(cls, *a, **k)
> >         obj.__dict__ = cls._shared_states.setdefault(group,{})
> >         return obj
>
> > class MyClass(SplinterBorg):
> >    def __init__(self, name):
> >        self.name = name
>
> > a1 = MyClass('a')
> > a2 = MyClass('aa')
> > b1 = MyClass('b', group="B")
>
> > Traceback (most recent call last):
> >   File "test.py", line 15, in <module>
> >     b1 = MyClass('b', group="B")
> > TypeError: __init__() got an unexpected keyword argument 'group'
>
> Because your subclass signature is completely wrong. Why did you feel
> you had to add an __init__() method to your subclass? This has two bvad
> effects:


Because this is what I need to do currently with using the standard
Borg class, and is something I would like to be able to do.  Here's a
simplified version of the current usage I have
=====
class Borg(object):
    _shared_state = {}
    def __new__(cls, *a, **k):
        obj = object.__new__(cls, *a, **k)
        obj.__dict__ = cls._shared_state
        return obj

class BorgConsole(Borg, SingleConsole):
    '''Every BorgConsole share a common state'''
    def __init__(self, locals={}, filename="Crunchy console"):
        SingleConsole.__init__(self, locals, filename=filename)

=====
and it is called via something like
a_console = BorgConsole(locals)

where locals is a previously defined dict.   Note that a number of
such instances are created dynamically as the program is used.

What I would like to do is to be able to add a "page_id"   (the Borg
group referred to my previous message), so that I could call

a_console = BorgConsole(locals, page_id)
where page_id would be an optional argument, defaulting to the BORG
group, as mentioned in my original post.

I must admit I did not try with keywords arguments ... and will not be
for a couple of hours while I am at work.


>
> 1. It stops the super-class's __init__() method from being called, and
>
I don't understand why this is so here, and not with the usual Borg
case as I used it...

> 2. It breaks the calling syntax specified in the superclass.
>
> All you really need is to create your SplinterBorgs with appropriate
> group names, you don't neef subclasses at all:
>
> a1 = SplinterBorg(group="one")
> a2 = SplinterBorg(group="two")
>
> and so on.
>
> If you want to create subclasses then they should work like this:
>
> class MyBorg1(SplinterBorg):
>      def __init__(self):
>          SplinterBorg.__init__(self, group='borg1')
>
> and so on, with a different group for each. But this seems over complicated.
>

I do need subclasses (I think) as my classes inherit from more than
the SplinterBorg class...  I'll  see what I can do following some of
your suggestions.

Thanks for the reply,

Andr?

> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
> --------------- Asciimercial ------------------
> Get on the web: Blog, lens and tag the Internet
> Many services currently offer free registration
> ----------- Thank You for Reading -------------




From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Sep  3 05:34:31 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 03 Sep 2007 11:34:31 +0200
Subject: Adding attributes stored in a list to a class dynamically.
In-Reply-To: <1188794274.562413.70140@k79g2000hse.googlegroups.com>
References: <mailman.297.1188755850.28954.python-list@python.org>
	<1i3t9va.1jkz4om1sajk8pN%aleax@mac.com>
	<1188769303.724140.248630@d55g2000hsg.googlegroups.com>
	<13dmehro14cjp05@corp.supernews.com>
	<1188794274.562413.70140@k79g2000hse.googlegroups.com>
Message-ID: <46dbd527$0$5441$426a74cc@news.free.fr>

Brian Munroe a ?crit :
> On Sep 2, 3:33 pm, Steven D'Aprano <st... at REMOVE-THIS-
> cybersource.com.au> wrote:
> 
>> In a nutshell, like all double-underscore methods, __setattr__ are for
>> overriding behaviour in your own classes. With very few exceptions, you
>> shouldn't need to directly call double-underscore methods (although you
>> often may _write_ double-underscore methods).
>>
> 
> I think I understand.  You are saying that if I wanted to override the
> normal behavior when doing something like
> 
>     p1.firstName = "Brian"
> 
> then I'd override __setattr__()?

That's one possible solution. Another one is to use a property object or 
a custom descriptor (you should find relevant documentation on python.org).

> But if I am doing something like creating dynamic attributes, the more
> 'correct' way is to use setattr?  Even though they both appear to do
> the same thing, the more Pythonic way is to never directly call magic
> methods (if you can help it)?

Mainly, yes.


From mccredie at gmail.com  Thu Sep 20 18:57:16 2007
From: mccredie at gmail.com (Matt McCredie)
Date: Thu, 20 Sep 2007 15:57:16 -0700
Subject: I could use some help making this Python code run faster using
	only Python code.
In-Reply-To: <1190325588.608625.259800@q3g2000prf.googlegroups.com>
References: <1190325588.608625.259800@q3g2000prf.googlegroups.com>
Message-ID: <9e95df10709201557q22e7daedmae48eabd42f2b1a4@mail.gmail.com>

On 9/20/07, Python Maniac <raychorn at hotmail.com> wrote:
> I am new to Python however I would like some feedback from those who
> know more about Python than I do at this time.

Well, you could save some time by not applying the scramble one line
at a time (that is if you don't mind losing the line endings in the
scrambled version). For that to be effective though, you probably want
to open in binary mode. Also, your scramble can be written using list
comprehension.

[code]
def scramble(s, key=0x80):
   return ''.join([chr(ord(c) ^ key) for c in s])

output = scramble(f.read())
[/code]

If you use xor (^) as above, you can use the same method for scramble
as descramble (running it again with the same key will descramble) and
you can use an arbitrary key. Though, with 255 combinations, it isn't
very strong encryption.

If you want stronger encryption you can use the following AESish algorithm:

[code]
import random
def scramble(s, key):
    random.seed(key)
    return ''.join([chr(ord(c) ^ random.randint(0,255)) for c in s])
[/code]

This allows you to use much larger keys, but with a similar effect.
Still not strong enough to be unbreakable, but much better than the
origional. It is strong enough that someone knowing how you scrambled
it will have trouble unscrambling it even if they don't know the key.

Matt


From donn at u.washington.edu  Fri Sep 21 19:18:15 2007
From: donn at u.washington.edu (Donn Cave)
Date: Fri, 21 Sep 2007 16:18:15 -0700
Subject: Would Anonymous Functions Help in Learning Programming/Python?
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
Message-ID: <donn-2F5252.16181421092007@gnus01.u.washington.edu>

In article <1190410638.211343.241690 at y42g2000hsy.googlegroups.com>,
 Cristian <super.sgt.pepper at gmail.com> wrote:
...

> To someone who's learning to program wouldn't a syntax like the
> further give them all they need and also reinforces the idea that
> functions are data just like everything else?
> 
> my_function = function(foo, bar): pass
> an_instance_method = function(self, foo): pass
> a_method_declaration = method(self, foo): pass

I think one followup has already alluded to the division
between Python `statements' and `expressions'.  The `def'
statement may create and bind a value, but since it's a
statement and not an expression, it doesn't have any value.
Python is not a functional programming language.  It probably
could be reinvented to eliminate statements, but ... there
are already plenty of languages to choose from.

If we're going there, though, I think it's obvious that
once you have defined

  an_instance_method = function(self, foo): ...

it should be invoked

  an_instance_method(an_instance, foo)

which would be much less messy in nested expressions where
the current standard OOP notation flips from right to left
too much ...

  string.join(x.split('-'), '').lower()

  --> lower(string.join('', split(x, '-')))

It might make for some interesting problems, but that's what
it's about, changing things so it stays fun for everyone.
At the same time, partial function parameter binding should
be implemented, so you could say

   dotted = string.join('.')
   ...
   v = dotted(['comp', 'lang', 'python'])

As you probably well know, that isn't my idea, it's a common
functional programming language idiom.

   Donn Cave, donn at u.washington.edu


From stefan.arentz at gmail.com  Thu Sep  6 03:00:02 2007
From: stefan.arentz at gmail.com (Stefan Arentz)
Date: 06 Sep 2007 09:00:02 +0200
Subject: We need PIGs :)
References: <mailman.131.1188450658.28954.python-list@python.org>
	<46d74472$0$402$426a34cc@news.free.fr>
Message-ID: <87hcm81dot.fsf@kip.sateh.com>

Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> writes:

...

> The problem with Java is that it makes it very painfull to bridge two
> APIs together, while Python usually makes it a breeze (easy
> delegation, no dumb-ass psycho-rigid type system). So Java's solution
> (hyper-formalization) isn't necessary here.

Interesting. I find Java much more predictable with APIs than Python
actually. Java has pretty strict rules for style and API design, which
basically all modern code follows pretty well. I think this is mostly
the result of a strict JSR regime.

What I find really frustrating in Python (combined with usually bad
documentation) is that many people have different styles. The most
frustratinng being getFoo() vs .foo, vs get_foo().

 S.


From kyosohma at gmail.com  Thu Sep  6 10:56:43 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 06 Sep 2007 07:56:43 -0700
Subject: Finding specific date ranges
Message-ID: <1189090603.285778.282060@g4g2000hsf.googlegroups.com>

Hi,

I am working on a timesheet application in which I need to to find the
first pay period in a month that is entirely contained in that month
to calculate vacation time. Below are some example date ranges:


December 31, 2006    January 13, 2007 # doesn't earn
January 14, 2007	January 27, 2007 # does earn
January 28, 2007	February 10, 2007 # doesn't
February 11, 2007	February 24, 2007 # does


So far, the best approach I've come up with is to create a list of
tuples that contain the pay period date ranges for the year and
iterate through the tuples looking for the first occurrence of the
month names matching. Then I'd add that date range to a separate list
and somehow ignore any other matches in that month. This seems like a
hack. Does anyone have a better idea?

Thanks in advance!

Mike



From michael at jedimindworks.com  Sat Sep 22 00:42:14 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Fri, 21 Sep 2007 21:42:14 -0700
Subject: Killing A Process By PID
In-Reply-To: <c19402930709201946qc8828f7h3725b4dd8c4b3823@mail.gmail.com>
References: <5970333469768353093@unknownmsgid>
	<c19402930709201946qc8828f7h3725b4dd8c4b3823@mail.gmail.com>
Message-ID: <E687AE52-6F72-4374-9662-84044B403210@jedimindworks.com>


On Sep 20, 2007, at 7:46 PM, Arvind Singh wrote:
> file('/var/lock/Application.lock', 'w').write(str(os.getpid()))
>
>  Which to be honest appears to run just fine, when I look in that  
> file it always contains the correct process ID, for instance, 3419  
> or something like that.
>
> I honestly doubt that. The I/O is buffered and you need to flush()/ 
> close() the file. Otherwise data may not get written until python  
> interpreter exits.

Isn't the file closed after the file().write()?  Seems to me that the  
great garbage collector in the sky will happily flush(), close() and  
forget it ever happened...

-Michael

---
"Those who don't understand UNIX are condemned to reinvent it,  
poorly."  --Henry Spencer



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From tleeuwenburg at gmail.com  Fri Sep 14 20:11:29 2007
From: tleeuwenburg at gmail.com (tleeuwenburg at gmail.com)
Date: Sat, 15 Sep 2007 00:11:29 -0000
Subject: Python Papers Reader Survey
Message-ID: <1189815089.525155.299620@19g2000hsx.googlegroups.com>

Greetings, readers. I have put together a survey designed to capture a
little information about how I can better target "The Python Papers"
towards the needs of its readers. This survey has been created as a
part of my "Marketing Management" assignment for my Masters of
Business Administration study. The results will be used to help create
a marketing plan for The Python Papers and should also help a great
deal in practical terms. It will help to guide our efforts when
soliciting articles from potential authors and other content-
generation activities. The questions relate to primarily to areas of
interest and are non-personal.

The survey can be found at http://freeonlinesurveys.com/rendersurvey.asp?sid=nhozmh9qv9hl2oe333133
. The survey is not a long one and I imagine could be completed in
under five minutes.

Thanks very much,
-Tennessee Leeuwenburg
(Editor-In-Chief, The Python Papers)



From larry.bates at websafe.com  Wed Sep 12 16:50:33 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Wed, 12 Sep 2007 15:50:33 -0500
Subject: xml question
In-Reply-To: <mailman.451.1189624890.2658.python-list@python.org>
References: <mailman.451.1189624890.2658.python-list@python.org>
Message-ID: <HYydnSTTnO2IzHXbnZ2dnUVZ_jGdnZ2d@comcast.com>

JYOUNG79 at kc.rr.com wrote:
> Just curious if there's any python xml parsing tools built into the Mac (OS 10.4.10 Tiger)?  If so, 
> could anyone 
> share some simple code (or maybe point me to a web-site) of how to parse xml data from a 
> file?  For example,  if I 
> had a file that contained this:
> 
> 		<colors>
> 			<color base="DeviceGray" />
> 			<color alt="DeviceCMYK" base="Separation">Black</color>
> 			<color alt="Lab" base="Separation">Light Blue</color>
> 			<color alt="ICCBased" base="Separation">Green</color>
> 		</colors>
> 
> I'd want to look in the 'colors' xml element, then look at each 'color' xml element inside and 
> pull any that have 
> values (which would be Black, Light Blue and Green).  I'd like to know how to pull 'attributes' 
> too.
> 
> Thanks very much for your help.
> 
> Jay

Python 2.5 has elementtree built into it.  You should be able to parse the XML 
and extract anything you want.

-Larry


From grante at visi.com  Sat Sep  1 00:28:26 2007
From: grante at visi.com (Grant Edwards)
Date: Sat, 01 Sep 2007 04:28:26 -0000
Subject: strings (dollar.cents) into floats
References: <mailman.140.1188483282.28954.python-list@python.org>
	<877incd20i.fsf@benfinney.id.au>
	<46d75cf3$0$7698$9b4e6d93@newsspool2.arcor-online.net>
	<1188575044.874256.42960@50g2000hsm.googlegroups.com>
	<fbaguc$gnm$5@lust.ihug.co.nz>
Message-ID: <13dhqjalm8hln79@corp.supernews.com>

On 2007-09-01, Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> wrote:
> In message <1188575044.874256.42960 at 50g2000hsm.googlegroups.com>,
> sturlamolden wrote:
>
>> There are fractions that can be exactly represented by floats that
>> cannot be exactly represented by decimals.
>
> There are no such.

In that statement does "float" mean finite-length base-2 FP and
"decimal" mean finite-length base-10 FP?

-- 
Grant Edwards                   grante             Yow!  My LESLIE GORE record
                                  at               is BROKEN...
                               visi.com            


From gherron at islandtraining.com  Tue Sep  4 03:55:16 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 04 Sep 2007 00:55:16 -0700
Subject: how to get a formatted string?
In-Reply-To: <006301c7eec7$654a9e00$4de1a8c0@amd.com>
References: <eeednfMnn5paIkHbnZ2dnUVZ_sGvnZ2d@trueband.net>	<46DCD51B.7040508@v.loewis.de>
	<006301c7eec7$654a9e00$4de1a8c0@amd.com>
Message-ID: <46DD0F64.807@islandtraining.com>

Ginger wrote:
> like format function in Visual Basic, 
> format("##.##%",0.3456) ==>>  34.56%
>   
"%5.2f%%" % (0.3456*100)
'34.56%'


See this section of the manual: 
http://docs.python.org/lib/typesseq-strings.html

Gary Herron



From daniel.j.larsson at gmail.com  Fri Sep  7 09:37:44 2007
From: daniel.j.larsson at gmail.com (Daniel Larsson)
Date: Fri, 7 Sep 2007 15:37:44 +0200
Subject: Class design (information hiding)
In-Reply-To: <fbrj0h$74r$1@online.de>
References: <fbr2gg$ipg$1@online.de> <46e1305e$0$18302$426a74cc@news.free.fr>
	<fbrj0h$74r$1@online.de>
Message-ID: <2bfa72fa0709070637q2ec34e0ft60ce6cdc106daeb0@mail.gmail.com>

On 9/7/07, Alexander Eisenhuth <newsuser at stacom-software.de> wrote:
>
> Bruno Desthuilliers schrieb:
>
> > Nope. It's either 'interface' (no leading underscore),  'implementation'
> > (single leading underscore), 'implementation with some protection
> > against accidental overriding' (two leading underscores).
>
> What do you mean with 'implementation'? What does it express?


"Don't touch my _members, they're my private parts! If you do, face the
consequences!"

Again, this isn't enforced by the language (other than the slight name
mangling on __names), but a convention that python programmers should adhere
to.

--
> http://mail.python.org/mailman/listinfo/python-list
>
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From roy at panix.com  Sat Sep  1 09:24:40 2007
From: roy at panix.com (Roy Smith)
Date: Sat, 01 Sep 2007 09:24:40 -0400
Subject: Co-developers wanted: document markup language
References: <87odgyyx9u.fsf@wilson.homeunix.com>
	<fakrtb$2ts$1@panix3.panix.com>
	<87tzqpew22.fsf@wilson.homeunix.com>
	<fal3cv$bi2$1@panix3.panix.com>
	<87tzqp77my.fsf@wilson.homeunix.com>
	<7xy7g1if24.fsf@ruckus.brouhaha.com> <fbbi1h$cdd$2@lust.ihug.co.nz>
Message-ID: <roy-5D1B70.09244001092007@news.panix.com>

Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand> wrote:

> By the way, did you know there was life before TEX? Back in that era, the
> main open-source markup system in use was ... troff. Still not quite dead
> today, it lives on in the definition of Unix/Linux man pages.

I would hardly call troff "open source", at least not "back in that era".  
When I first started using roff and nroff, you had to sign all sorts of 
non-disclosure paperwork to get a copy of Unix.  It wasn't until much later 
that things like the BSD and GNU projects started coming out with open 
source versions.

Of course, the whole roff family is based on the old runoff program (which 
in turn was probably based on something else).

Anybody remember Scribe?


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Sep 12 10:14:41 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 12 Sep 2007 16:14:41 +0200
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <1189604018.520338.162520@57g2000hsv.googlegroups.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189604018.520338.162520@57g2000hsv.googlegroups.com>
Message-ID: <46e7f450$0$12305$426a74cc@news.free.fr>

Dave Hansen a ?crit :
(snip)
> As others have mentioned, you can also provide local synonyms if the
> dot syntax is too onerous.  But make sure you use the member access
> syntax if the result of an expression is an immutable type.  For
> example, I assume a_dot is a mutable type, such as a list.  If so,
> then you could simply use
> 
>    a_dot, k, a, u = self.a_dot, self.k, self.a, self.u
>    a_dot = -k(a-u)
> 
> However, if it's an immutable type, such as a scalar, strung, or
> tuple, you need
> 
>    self.a_dot = -k(a-u)

Hmmm... Actually, whether self.a_dot is an instance of a mutable or 
immutable type won't change anything - in both case, it's only the 
*local* name a_dot that'll be rebound. So <op> as soon as you want to 
rebind (iow:assign to) an attribute, you *need* to use 
self.the_attr_name on the LHS.

Of course, *mutating* is a different situation...



From jelleferinga at gmail.com  Thu Sep  6 13:28:33 2007
From: jelleferinga at gmail.com (jelle)
Date: Thu, 06 Sep 2007 17:28:33 -0000
Subject: initializing cooperative method
In-Reply-To: <13e0bgg5lo0p2ec@corp.supernews.com>
References: <1189095131.853954.233660@r34g2000hsd.googlegroups.com>
	<13e0bgg5lo0p2ec@corp.supernews.com>
Message-ID: <1189099713.851340.288580@r29g2000hsg.googlegroups.com>

Ai, calling super(Abstract) is just getting object, sure...

However, I'm still curious to know if there's a good idiom for
repeating the argument in __init__ for the super(Concrete,
self).__init__ ?

Thanks,

-jelle



From wizzardx at gmail.com  Fri Sep 21 15:53:15 2007
From: wizzardx at gmail.com (David)
Date: Fri, 21 Sep 2007 21:53:15 +0200
Subject: Python Regex Question
In-Reply-To: <46f415ff$0$3060$e4fe514c@dreader31.news.xs4all.nl>
References: <1190316811.760038.145850@50g2000hsm.googlegroups.com>
	<46f2c7e8$0$21956$88260bb3@free.teranews.com>
	<1190332336.357719.28060@19g2000hsx.googlegroups.com>
	<46f415ff$0$3060$e4fe514c@dreader31.news.xs4all.nl>
Message-ID: <18c1e6480709211253h26702b5bk9962b1a2e9b3f276@mail.gmail.com>

> re.search(expr, string) compiles and searches every time. This can
> potentially be more expensive in calculating power. especially if you
> have to use the expression a lot of times.

The re module-level helper functions cache expressions and their
compiled form in a dict. They are only compiled once. The main
overhead would be for repeated dict lookups.

See sre.py (included from re.py) for more details. /usr/lib/python2.4/sre.py


From bignose+hates-spam at benfinney.id.au  Wed Sep 26 02:20:57 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 26 Sep 2007 16:20:57 +1000
Subject: setuptools without unexpected downloads
References: <87ejgmklep.fsf@benfinney.id.au>
Message-ID: <878x6ukkvq.fsf@benfinney.id.au>

Ben Finney <ben at benfinney.id.au> writes:

> How can I, as the distributor of a package using setuptools, gain
> the benefits of dependency declaration and checking, without the
> drawback of unexpected and potentially unwanted download and
> installation?

To clarify: I want to retain the "assert the specified dependencies
are satisfied" behaviour, without the "... and, if not, download and
install them the Setuptools Way" behaviour.

Instead, I just want the default "dependencies not satisfied"
behaviour for my 'setup.py' program to be: complain the dependencies
aren't met, and refuse to install.

If I can set that default, and allow individual users to specifically
override that and get the "download and install un-met dependencies"
behaviour if they want, all well and good; but that's not necessary.

How can I get this happening with setuptools?

-- 
 \          "One time a cop pulled me over for running a stop sign. He |
  `\        said, 'Didn't you see the stop sign?' I said, 'Yeah, but I |
_o__)             don't believe everything I read.'"  -- Steven Wright |
Ben Finney


From ldo at geek-central.gen.new_zealand  Sun Sep  2 05:50:18 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sun, 02 Sep 2007 21:50:18 +1200
Subject: So what exactly is a complex number?
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
	<mailman.212.1188576194.28954.python-list@python.org>
	<451mq4-les.ln1@ozzie.tundraware.com>
	<46d89ba9$0$30380$9b4e6d93@newsspool4.arcor-online.net>
	<fbamkq$r7q$5@lust.ihug.co.nz>
	<46d92f54$0$4533$9b4e6d93@newsspool3.arcor-online.net>
	<tijpq4-uo22.ln1@ozzie.tundraware.com>
Message-ID: <fbe0s5$rlm$1@lust.ihug.co.nz>

In message <tijpq4-uo22.ln1 at ozzie.tundraware.com>, Tim Daneliuk wrote:

> No, but go to my other example of an aircraft in flight and winds
> aloft.  It is exactly the case that complex numbers provide a convenient
> way to add these two "vectors" (don't wince, please) to provide the
> effective speed and direction of the aircraft.  Numerous such examples
> abound in physics, circuit analysis, the analysis of rotating machinery,
> etc.

Not really. The thing with complex numbers is that they're
numbers--mathematically, they comprise a "number system" with operations
called "addition", "subtraction", "multiplication" and "division" having
certain well-defined properties (e.g. associativity of multiplication, all
numbers except possibly one not having a multiplicative inverse).

An aircraft in flight amidst winds needs only vector addition (and possibly
scalar multiplication) among the basic operations to compute its path--you
don't need to work with complex numbers as such for that purpose.

For my AC circuit theory example, however, you do.


From stephane at harobed.org  Mon Sep 24 16:47:18 2007
From: stephane at harobed.org (KLEIN Stephane)
Date: Mon, 24 Sep 2007 20:47:18 +0000 (UTC)
Subject: I don't undestand why sometime python (or other) add "tmpWvk7zy"
	(tmp + random string) after "buildout-eggs" in path of python script
Message-ID: <fd97om$s9k$1@sea.gmane.org>

Hi,

first, I think that my question is generalist and don't impact only 
zopeproject and/or Paste package.

Instance, when I trace (debug) some scripts, its name is "/home/harobed/
buildout-eggs/tmpWvk7zy/PasteScript-1.3.6-py2.5.egg/paste/script/
serve.py" instead of "/home/harobed/buildout-eggs/PasteScript-1.3.6-
py2.5.egg/paste/script/serve.py". I don't understand why and who append 
"tmpWvk7zy" after "buildout-eggs".

I don't know if it's related with python thread support.

This trouble is very not useful to debug because pdb can't load source 
code for its path is not found. 

Thanks for your help.
Stephane



From wizzardx at gmail.com  Mon Sep 10 02:27:11 2007
From: wizzardx at gmail.com (David)
Date: Mon, 10 Sep 2007 08:27:11 +0200
Subject: Spell-checking Python source code
In-Reply-To: <18c1e6480709090802t654abc98r3c2639c752a9568d@mail.gmail.com>
References: <1189285495.185657.88010@o80g2000hse.googlegroups.com>
	<46E314FD.7030200@bigfoot.com>
	<18c1e6480709081444x69c4d23cx65f7c9b62eda8271@mail.gmail.com>
	<46E32273.2050304@bigfoot.com>
	<18c1e6480709090802t654abc98r3c2639c752a9568d@mail.gmail.com>
Message-ID: <18c1e6480709092327r2e235d23mc4ebcc2c79640d0b@mail.gmail.com>

On 9/9/07, David <wizzardx at gmail.com> wrote:
> > tokenize.tokenize(
> >     file.readline,
> >     processStrings
> >     )
> >
> > How would you go about writing the output to a file? I mean, I would
> > like to open the file at main level and pass a handle to the file to
> > processStrings to write to it, finally close output file at main level.
> > Probably a class with a processString method?
>

You can also use closures for this.

http://ivan.truemesh.com/archives/000411.html

See the example in the "Assignment considered awkward" section. Since
you're not assigning to your file variable in processStrings you don't
have to use the list work-around mentioned later in the doc.


From not_here at no_where.com  Tue Sep 11 21:02:42 2007
From: not_here at no_where.com (Brian)
Date: Tue, 11 Sep 2007 18:02:42 -0700
Subject: python 2.5 problems
In-Reply-To: <1189410656.649807.63640@r29g2000hsg.googlegroups.com>
References: <3nVEi.98555$Vk6.66626@newsfe07.phx>
	<mailman.293.1189360234.2658.python-list@python.org>
	<1189410656.649807.63640@r29g2000hsg.googlegroups.com>
Message-ID: <JUGFi.91851$Mu5.20606@newsfe15.phx>

Was not specific about my process. Yes, I did use the 
'formal' windoze uninstall using Add/Remove Programs.

I ran the same code and idle at work (XP Pro/SP2/Python 
2.4) with no problems. My next step is to install 
python 2.5 at work.

My Linux partition has Python 2.4, and I do not use 
idle on Linux, so the test would probably not be legit.

any ideas/suggestions ???

Ant wrote:
> On Sep 9, 6:57 pm, "O.R.Senthil Kumaran" <orsent... at gmail.com> wrote:
>>> Finally deleted 2.2 and loaded 2.5 (see below), using
>> Dont delete. Uninstall python 2.2 and additional modules if you have installed them.
> 
> But since you've already deleted 2.2, download and reinstall 2.2,
> uninstall 2.2 and 2.5 via Add/Remove Programs and then reinstall 2.5
> again.
> 
> --
> Ant...
> 


From nfrancken at gmail.com  Thu Sep  6 19:01:16 2007
From: nfrancken at gmail.com (windandwaves)
Date: Thu, 06 Sep 2007 16:01:16 -0700
Subject: why should I learn python
In-Reply-To: <87zlzzs9by.fsf@wilson.homeunix.com>
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
	<mailman.189.1189118213.2658.python-list@python.org>
	<87zlzzs9by.fsf@wilson.homeunix.com>
Message-ID: <1189119676.239459.325280@w3g2000hsg.googlegroups.com>

On Sep 7, 10:44 am, Torsten Bronger <bron... at physik.rwth-aachen.de>
wrote:
> Hall?chen!
>
> Tom Brown writes:
> > [...] Python has been by far the easiest to develop in.  Some
> > people might say it is not "real programming" because it is so
> > easy.
>
> I can't believe this.  Have you really heard such a statement?
>
> Tsch?,
> Torsten.
>
> --
> Torsten Bronger, aquisgrana, europa vetus
>                                       Jabber ID: bron... at jabber.org
>                       (Seehttp://ime.webhop.orgfor ICQ, MSN, etc.)

Hmmm, thank you all for your replies.  I will do some research on the
net (i did some already, but because I am really not much of a
programmer, it is often too detailed for me).  I have limited time,
but it does sound like something to learn, just for fun and for
practical use.  How would you use it in a web development
environment?  I mean, in real practical terms.  Could it assist with
php? Is it easy to write GUI programs in Python?



From kyosohma at gmail.com  Fri Sep 28 15:46:09 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 28 Sep 2007 19:46:09 -0000
Subject: OCBC connection
In-Reply-To: <mailman.1241.1191002850.2658.python-list@python.org>
References: <mailman.1228.1190992159.2658.python-list@python.org>
	<1191000128.112881.111790@r29g2000hsg.googlegroups.com>
	<mailman.1241.1191002850.2658.python-list@python.org>
Message-ID: <1191008769.878419.307310@k79g2000hse.googlegroups.com>

On Sep 28, 1:07 pm, Steve Holden <st... at holdenweb.com> wrote:
> kyoso... at gmail.com wrote:
> > On Sep 28, 9:57 am, "Sugrue, Sean" <Sean.Sug... at analog.com> wrote:
> >> I'm trying to make an odbc connection to postgresql which is on a server
> >> using python.
> >> Does anyone have a code snippet to make a basic connection with a select
> >> query?
>
> >> Sean
>
> > Sean,
>
> > This appears to be what you're looking for:
>
> >http://www.devx.com/opensource/Article/29071
>
> > See also Python Database spec and module page:
>
> >http://www.python.org/topics/database/
>
> Mike:
>
> This doesn't address the ODBC part of the inquiry. I was actually going
> to respond saying I wasn't aware of an ODBC driver for PostgreSQL
> (though I'd be surprised if there wasn't one).
>
> Using the psycopg2 module, which is my preferred PostgreSQL interface
> module, it's easy to answer:
>
>  >>> curs = conn.cursor()
>  >>> import psycopg2 as db
>  >>> conn = db.connect(database="pycon", user="username",
>          password="password", host="localhost", port=5432)
>  >>> curs = conn.cursor()
>  >>> curs.execute("SELECT orgid, orgname FROM organization")
>  >>> from pprint import pprint # just for neatness
>  >>> pprint(curs.fetchall())
> [(1, 'AB Strakt'),
>   (79, 'DevIS'),
>      ...
>   (113, 'Test Organization'),
>   (19, 'Holden Web LLC')]
>  >>>
>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
>
> Sorry, the dog ate my .sigline

Whoops! I almost posted some code using the adodb or the odbc module,
which is what I would have probably used, but I figured I'd take a
look and see if there was a postgres module available. I'm not seeing
any basic differences between your code and the code I linked to
though...except that if I ran your first line of code, I would get an
exception as "conn" hasn't been defined yet.

Whatever. I apologize for being misleading(?)

Mike



From Michael.O.Rivera at gmail.com  Sun Sep 16 15:57:27 2007
From: Michael.O.Rivera at gmail.com (PFGCIO)
Date: Sun, 16 Sep 2007 19:57:27 -0000
Subject: The path '/' was not found.
Message-ID: <1189972647.697108.315460@g4g2000hsf.googlegroups.com>

I've checked for space/tab problems twice.  Any ideas?  Thanks ahead
of time.

404 Not Found
The path '/' was not found.

Page handler: "The path '/' was not found."
Traceback (most recent call last):
  File "c:\python25\lib\site-packages\cherrypy-2.2.1-py2.5.egg\cherrypy
\_cphttptools.py", line 105, in _run
    self.main()
  File "c:\python25\lib\site-packages\cherrypy-2.2.1-py2.5.egg\cherrypy
\_cphttptools.py", line 246, in main
    page_handler, object_path, virtual_path =
self.mapPathToObject(path)
  File "c:\python25\lib\site-packages\cherrypy-2.2.1-py2.5.egg\cherrypy
\_cphttptools.py", line 312, in mapPathToObject
    raise cherrypy.NotFound(objectpath)
NotFound: 404


controllers.py

import logging

import cherrypy
from docutils.core import publish_parts

import turbogears
from turbogears import controllers, expose, validate, redirect

from brokerconduit import json
from brokerconduit.model import Service

class Root(controllers.RootController):
    @expose(template="brokerconduit.templates.home")
    def home(self , servicename="BrokerConduit"):
        service = Service.byServicename(servicename)
        return dict(service=service)



From daniel.j.larsson at gmail.com  Wed Sep  5 10:14:57 2007
From: daniel.j.larsson at gmail.com (Daniel Larsson)
Date: Wed, 5 Sep 2007 16:14:57 +0200
Subject: handling modules in packages
In-Reply-To: <384C9792-3923-42C6-8F9C-E3EB19B8811A@mac.com>
References: <619B716A-C1EB-42DF-9702-E288AD04F613@mac.com>
	<fbmbp3$nm8$1@sea.gmane.org>
	<384C9792-3923-42C6-8F9C-E3EB19B8811A@mac.com>
Message-ID: <2bfa72fa0709050714u7c752ab3pc2f698a291d9f8c8@mail.gmail.com>

On 9/5/07, Tommy Grav <tgrav at mac.com> wrote:
>
> >>
> > The simplest thing to do would be to have PyAstro.__init__.py
> > import all
> > the sub-modules, and define __all__ as the set of names that the
> > package
> > should inject into importing modules.
> >
> > Then you could write (for example)
> >
> > from PyAstro import numpy, constants, conversion, obsrvations
> >
> > However if you are simply worried about run-time efficiency then don't
> > be: once a module is imported further imports essentially reduce to
> > checking that the module is already present in the sys.modules
> > dict, and
> > so take almost no time at all.
>
> So am I understanding it right that a second import numpy statement
> in a different module (and thus a different namespace) just results in
> a binding to the already existing numpy "object"?


Yes, correct
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From __peter__ at web.de  Tue Sep 25 04:40:37 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 25 Sep 2007 10:40:37 +0200
Subject: strange behavious of the logging module?
References: <fd6n9i$8hc$1@news1.zdv.uni-mainz.de>
	<fd7nf6$g14$02$1@news.t-online.com>
	<1190643051.084144.230220@o80g2000hse.googlegroups.com>
	<fd8l4n$9o1$03$1@news.t-online.com>
	<1190672978.233964.232900@g4g2000hsf.googlegroups.com>
	<fdaepi$k6m$00$1@news.t-online.com>
	<fdaga7$e7j$1@news1.zdv.uni-mainz.de>
Message-ID: <fdahi5$4e4$03$2@news.t-online.com>

Christian Meesters wrote:

> Peter Otten wrote:
> 
>> Vinay Sajip wrote:
>> 
>>> This is a known bug, and not specifically related to logging, though
>>> it sometimes manifests itself via logging:
>>> 
>>> http://bugs.python.org/issue1180193
>> 
>> Yup, thanks for looking into it.
>> 
>> Peter
> Thanks Vinay, but I am curious how issue 1180193 is related to the "bug"
> Peter and me described: I do not have any *.pyc file around. As I kept
> changing the file during development I used to call the program directly
> using a link in my PATH. Hence no *.pyc file got created at all. 

The problem is not caused by the pyc-file for your script, but by
the logging/__init__.pyc file in your python installation. You
can check if you are affected by the bug by typing

>>> logging.info.func_code.co_filename
'logging/__init__.py'
>>> logging._srcfile
'/usr/lib/python2.5/logging/__init__.py'

in the interpreter. If you get different paths like in "logging" and
"/usr/lib/python2.5/logging" in the above example you are affected.

> However, does anybody know a suggestion for a work-around?

You could try setting

logging._srcfile = logging.info.func_code.co_filename

manually, but that might break other things. Or you recreate the pyc-files
of your distribution. Again, I don't know what might break...

Peter


From per9000 at gmail.com  Sun Sep 23 09:40:21 2007
From: per9000 at gmail.com (per9000)
Date: Sun, 23 Sep 2007 06:40:21 -0700
Subject: annoying stdin/stdout + pipes problem
Message-ID: <1190554821.677666.93530@w3g2000hsg.googlegroups.com>

Hi,
I want to create a program that reads input from stdio that can prompt
a user for input while doing so without getting into problems.

A simplified version of what I want:

I have an input file
***>cat input.txt
foo bar baz
fubar barooba xyxxyt
raboof txet
black knight

And a file that replaces certain words
***>cat replace2.py
from sys import stdin, stdout

def censor(foo, bar, input):
    return input.replace(foo, bar)

# i = raw_input('Remove what? ').strip()
# o = raw_input('Replace "%s" with what? ' %i).strip()

for line in stdin.xreadlines():
    line = censor('foo', 'candy', line)
    line = censor('bar', 'donkey', line)
    line = censor('baz', 'hare rama', line)
    # line = censor(i, o, line)
    stdout.write(line)

***>cat input.txt | python replace2.py
candy donkey hare rama
fudonkey donkeyooba xyxxyt
raboof txet
black knight

As you can see I have commented out what I'd like to do but do not
know how to. Can I somehow halt the previous print to stdout (cat
input.txt) - if so can I then start it again, and how?

I want to use this to use it in a small encryption program called txet
in order to do something like this:
tar -blabla ~ | gzip -blabla | txet -e -stdin -stdout > /tmp/
home.tar.gz.txet
Of course I want to use it to get the password from the user.

Thanks,
Per

PS: a prototype can be downloaded from www.txet.org



From mensanator at aol.com  Sat Sep 22 12:50:40 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: Sat, 22 Sep 2007 09:50:40 -0700
Subject: Getting rid of bitwise operators in Python 3?
In-Reply-To: <46f49740$0$32514$4c368faf@roadrunner.com>
References: <46f49740$0$32514$4c368faf@roadrunner.com>
Message-ID: <1190479840.694294.301720@o80g2000hse.googlegroups.com>

On Sep 21, 10:44?pm, Carl Banks <pavlovevide... at gmail.com> wrote:
> Anyone with me here?  (I know the deadline for P3 PEPs has passed; this
> is just talk.)

Are you a loony?

Python doesn't have enough bit operations.

I'm always using the gmpy module's bit functions:

    digits(...)
        digits(x[,base]): returns Python string
        representing x in the given base (2 to 36,
        default 10 if omitted or 0); leading '-'
        present if x<0, but no leading '+' if x>=0.
        x must be an mpz, or else gets coerced into one.

    getbit(...)
        getbit(x,n): returns 0 or 1, the bit-value
        of bit n of x; n must be an ordinary Python
        int, >=0; x is an mpz, or else gets coerced
        to one.

    hamdist(...)
        hamdist(x,y): returns the Hamming distance
        (number of bit-positions where the bits
        differ) between x and y.  x and y must be
        mpz, or else get coerced to mpz.

    lowbits(...)
        lowbits(x,n): returns the n lowest bits of
        x; n must be an ordinary Python int, >0;
        x must be an mpz, or else gets coerced to one.

    numdigits(...)
        numdigits(x[,base]): returns length of string
        representing x in the given base (2 to 36,
        default 10 if omitted or 0); the value returned
        may sometimes be 1 more than necessary; no
        provision for any 'sign' characte, nor leading
        '0' or '0x' decoration, is made in the returned
        length.  x must be an mpz, or else gets coerced
        into one.

    popcount(...)
        popcount(x): returns the number of 1-bits set
        in x; note that this is 'infinite' if x<0,
        and in that case, -1 is returned. x must be
        an mpz, or else gets coerced to one.

    scan0(...)
        scan0(x, n=0): returns the bit-index of the
        first 0-bit of x (that is at least n); n must
        be an ordinary Python int, >=0.  If no more
        0-bits are in x at or above bit-index n
        (which can only happen for x<0, notionally
        extended with infinite 1-bits), None is
        returned. x must be an mpz, or else gets
        coerced to one.

    scan1(...)
        scan1(x, n=0): returns the bit-index of the
        first 1-bit of x (that is at least n); n
        must be an ordinary Python int, >=0.  If no
        more 1-bits are in x at or above bit-index
        n (which can only happen for x>=0, notionally
        extended with infinite 0-bits), None is returned.
        x must be an mpz, or else gets coerced to one.

    setbit(...)
        setbit(x,n,v=1): returns a copy of the value
        of x, with bit n set to value v; n must be
        an ordinary Python int, >=0; v, 0 or !=0;
        x must be an mpz, or else gets coerced to one.

And I don't do hardware, I do math research where
things like Hamming distance, popcount and scan1
are used extensively along with Python's bit
operators like >>.

Hey, I never use classes, maybe we should get rid of
them also, eh?



From aahz at pythoncraft.com  Sun Sep  2 12:40:41 2007
From: aahz at pythoncraft.com (Aahz)
Date: 2 Sep 2007 09:40:41 -0700
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<mailman.120.1188423362.28954.python-list@python.org>
	<K_bCi.721$7P7.506@newssvr19.news.prodigy.net>
	<1188709535.459572.22130@r34g2000hsd.googlegroups.com>
Message-ID: <fbep29$b3n$1@panix3.panix.com>

In article <1188709535.459572.22130 at r34g2000hsd.googlegroups.com>,
Russ  <uymqlp502 at sneakemail.com> wrote:
>
>Excellent points. As for "no strong case for adding new features to
>Python specifically for design-by-contract," if you mean adding
>something to language itself, I agree, but I see nothing wrong with
>adding it to the standard libraries, if that is possible without
>changing the language itself. Someone please correct me if I am wrong,
>but I think PEP adds only to the libraries.

You're wrong, but even aside from that, libraries need to prove
themselves useful before they get added.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"Many customs in this life persist because they ease friction and promote
productivity as a result of universal agreement, and whether they are
precisely the optimal choices is much less important." --Henry Spencer
http://www.lysator.liu.se/c/ten-commandments.html


From python at cx.hu  Tue Sep  4 18:09:46 2007
From: python at cx.hu (Ferenczi Viktor)
Date: Wed, 5 Sep 2007 00:09:46 +0200
Subject: doctest and decorators
In-Reply-To: <2bfa72fa0709041452o72d9a98fp939852d061a2cda3@mail.gmail.com>
References: <2bfa72fa0709041329i14b5b547i2eb85250f7547da@mail.gmail.com>
	<200709042316.08263.python@cx.hu>
	<2bfa72fa0709041452o72d9a98fp939852d061a2cda3@mail.gmail.com>
Message-ID: <200709050009.46380.python@cx.hu>

> > @functools.wraps(f)
> > Pass the function to be wrapped by the decorator to the wraps function.
> Ooops, right. That doesn't change the fact that decorated functions get
> hidden from doctest though.

Run my test script (one file) with the -v (verbose) option. Without the -v 
option it does not show output. This fact is documented in the Python manual 
at the doctest module.

--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- 
import functools

def simplelog(f):
    @functools.wraps(f)
    def new_f(*args, **kwds):
        print "Wrapper calling func"
        return f(*args, **kwds)
    return new_f

@simplelog
def test():
    """
    >>> test()
    Wrapper calling func
    'works!'
    """
    return 'works!'

def fn():
    """
    >>> fn()
    'ok'
    """
    return 'ok'

if __name__ == '__main__':
    import doctest
    doctest.testmod()
--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- 

Regard, Viktor


From surekap at gmail.com  Thu Sep 13 00:26:16 2007
From: surekap at gmail.com (Prateek)
Date: Wed, 12 Sep 2007 21:26:16 -0700
Subject: Possible suggestion for removing the GIL
Message-ID: <1189657576.772108.136550@d55g2000hsg.googlegroups.com>

Hi,

Recently there was some talk on removing the GIL and even the BDFL has
written a blog post on it.
I was trying to come up with a scalable and backwards compatible
approach for how to do it.

I've put my thoughts up in a blog post - and I'd really like to hear
what the community thinks of it.
Mainly it revolves around dedicating one core for executing
synchronized code and doing context switches instead of acquiring/
releasing locks.

http://www.brainwavelive.com/blog/index.php?/archives/12-Suggestion-for-removing-the-Python-Global-Interpreter-Lock.html

Thanks,
Prateek Sureka



From deets at nospam.web.de  Wed Sep  5 08:59:55 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 05 Sep 2007 14:59:55 +0200
Subject: threads
References: <1188995538.507987.142250@k79g2000hse.googlegroups.com>
Message-ID: <5k7nicF2ho9gU1@mid.uni-berlin.de>

vijayca wrote:

> i have written a script that spawns some threads....
> all run in parallel....
> now i need to stop all the threads once i press a key(example: "\n")
> how to do it...

That's a FAQ. Search this NG/ML for exhaustive discussions. The quick answer
is:

 - you can't stop externally

 - so you must rely on frequently checking some flag inside your worker
threads.

Like this (untested):

class MyThread(Thread):
  
  def __init__(self):
     Thread.__init__(self)
     self.running = True

  def run(self):
     while self.running:
         work()

Set MyThread.running to False when the key is pressed.


Diez


From subscriber100 at rjs.org  Fri Sep 28 10:48:52 2007
From: subscriber100 at rjs.org (Ray Schumacher)
Date: Fri, 28 Sep 2007 07:48:52 -0700
Subject: is there a posh Win32 binary? or, compiling with MS 2005 Express...
Message-ID: <6.2.3.4.2.20070928073722.03435950@pop-server.san.rr.com>

Is there a posh Win32 binary?
Or better, has anyone successfully compiled modules for Python 2.4 
with the newest "free" tools? Do I need to move to 2.5?

I could not get it to compile with my (apparently incomplete) MS C++ 
7.1 install (which did, however, work for weave/blitz, before).
The 7.1 compiler with the 1.1SDK is no longer available, so I can't 
repair the install.
I went through the motions of compiling yesterday with the new MS 
Express Toolkit on another machine and failed. Distutils keeps saying 
that the SDK for 7.1 is not installed.

Ray



From timaranz at gmail.com  Thu Sep 27 20:31:06 2007
From: timaranz at gmail.com (timaranz at gmail.com)
Date: Thu, 27 Sep 2007 17:31:06 -0700
Subject: developing an application
In-Reply-To: <1190930761.625756.309830@50g2000hsm.googlegroups.com>
References: <1190930761.625756.309830@50g2000hsm.googlegroups.com>
Message-ID: <1190939466.475390.58460@g4g2000hsf.googlegroups.com>

On Sep 28, 10:06 am, yadin <conra2... at yahoo.com> wrote:
> hi!
> i was buiding an application using python...a program
> this was my first one...now that i got it working perfectly
> how can i put the bunch of files into one package?
> the user of the appliation will not know where to start? that is which
> file to click on in oder to start the program?
> thanks a lot

Check out py2exe and distutils



From pavlovevidence at gmail.com  Sat Sep 22 03:03:30 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sat, 22 Sep 2007 03:03:30 -0400
Subject: Getting rid of bitwise operators in Python 3?
References: <46f49740$0$32514$4c368faf@roadrunner.com>
	<13f99fediasg3ae@corp.supernews.com>
Message-ID: <46f4c171$0$26367$4c368faf@roadrunner.com>

On Sat, 22 Sep 2007 05:19:42 +0000, Grant Edwards wrote:
> On 2007-09-22, Carl Banks <pavlovevidence at gmail.com> wrote:
> 
>> Anyone with me here?  (I know the deadline for P3 PEPs has passed; this
>> is just talk.)
> 
> Not me.
> 
>> Not many people are bit-fiddling these days.
> 
> I do.

Your anecdotal evidence is noted and given all the consideration it's due.


>> One of the main uses of bit fields is flags, but that's not often done
>> in Python because of keyword arguments and dicts, which are lot more
>> versatile.  Another major use, talking to hardware, is not something
>> oft done in Python either.
> 
> I do it all the time.

Anecdotes again.  Do you have any stats on the usage of hardware 
interfacing in Python?  That would be a lot more useful.


> Bit fiddling is also required for implementing communications
> prototocols.

Fair enough.  That is a big issue, and defintely common on Python.


>> Is it worth it to make such a change?  It would remove a lot of
>> operators (11 by my count), vastly simplifying syntax,  Which, IMHO, is
>> no small thing.
> 
> If you don't want to use the bitwise operations, then ignore them. 
> Presto!  Simpler syntax.

Until people no longer need to read code written by others, this argument 
is utter bull.

It's completely besides the point, anyways.  The point is to make the 
language core smaller.  It would shift code implementing bitwise logic 
out the core parts of Python, and localize it in modulespace.  It's not 
about trying to make the mental footprint of the language smaller; in 
fact, wouldn't do that at all.


>> Obviously, how widespread their usage is would matter.  But keep in
>> mind it would also be easy to convert the code automatically, because
>> the Python parser could reliably find all bitwise operations reliably.
> 
> The resulting code wold be fugly.

Of course it would be.  The reason I mention it is that automatic 
convertibility is a key factor in whether a change can make it into 
Python 3.


Carl Banks


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun Sep 30 19:23:29 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 01 Oct 2007 01:23:29 +0200
Subject: Can you please give me some advice?
References: <mailman.1300.1191147737.2658.python-list@python.org>
	<13fuv0gh7342r27@corp.supernews.com>
	<1191173228.756531.225860@o80g2000hse.googlegroups.com>
Message-ID: <5mapfhFccc9cU1@mid.individual.net>

 cmpython at gmail.com wrote:

> And, as someone who has been learning Python from almost no
> knowledge of programming, I've found it is not too bad in trying
> to keep as reasonably close to a natural language like English
> as possible.

Sure, your next project should be learning COBOL -- it must be
*very* intuitive. 

> On the other hand, perhaps because Ruby is newer it has been able
> to freshly start with advantages learned from the difficulties of
> other languages. 

What are those advantages in respect to Python?

Regards,


Bj?rn

-- 
BOFH excuse #4:

static from nylon underwear



From steve at REMOVE-THIS-cybersource.com.au  Sat Sep 15 20:48:39 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sun, 16 Sep 2007 00:48:39 -0000
Subject: Python statements not forcing whitespace is messy?
References: <1189884110.006272.240840@50g2000hsm.googlegroups.com>
	<46EC3C6E.6050002@sdf.lonestar.org>
	<mailman.598.1189901626.2658.python-list@python.org>
Message-ID: <13eovb712m4j62f@corp.supernews.com>

On Sun, 16 Sep 2007 09:14:57 +0900, Ryan Ginstrom wrote:

>> On Behalf Of J. Cliff Dyer
>> On the other hand, this is just as bad:
>> 
>> [ ( y ) for ( x , y ) in [ ( "foo" , 2 ) , ( "bar" , 4 ) ] if "foo" in
>> ( x ) ]
> 
> I think that's allowed in order to recruit C/C++ programmers.

Heh :)

In all seriousness, sometimes, in an extremely crowded and busy 
expression, adding a little extra whitespace to emphasize the boundaries 
between sub-expressions is a good thing. And let's not forget that we can 
do this:

>>> complex_expression = (
... 2*x +             # double the whatzit
... 1.78**(c*3-1) +   # see chapter 2 of Martelli, 2008
... sin(radians(80))  # angle between the foo and the bar
... )



-- 
Steven.


From jscrerar at compuserve.com  Sun Sep 30 20:29:38 2007
From: jscrerar at compuserve.com (Jim)
Date: Sun, 30 Sep 2007 17:29:38 -0700
Subject: Command-line does work when scheduled
In-Reply-To: <13g0f31ak031jc4@corp.supernews.com>
References: <1191098074.342460.52130@n39g2000hsh.googlegroups.com>
	<mailman.1289.1191100817.2658.python-list@python.org>
	<1191104269.578536.56470@g4g2000hsf.googlegroups.com>
	<mailman.1291.1191113688.2658.python-list@python.org>
	<1191114246.668635.327080@o80g2000hse.googlegroups.com>
	<mailman.1293.1191120273.2658.python-list@python.org>
	<1191163376.067339.34740@d55g2000hsg.googlegroups.com>
	<13g0f31ak031jc4@corp.supernews.com>
Message-ID: <1191198578.984891.233620@19g2000hsx.googlegroups.com>

On Sep 30, 6:16 pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On Sun, 30 Sep 2007 07:42:56 -0700, Jim <jscre... at compuserve.com>
> declaimed the following in comp.lang.python:
>
> > What else could be wrong?
> > Thanks,
>
>         Possibly those associations are only defined for your login account,
> and not active for the "account" that the task scheduler is running
> under?
> --
>         Wulfraed        Dennis Lee Bieber               KD6MOG
>         wlfr... at ix.netcom.com             wulfr... at bestiaria.com
>                 HTTP://wlfraed.home.netcom.com/
>         (Bestiaria Support Staff:               web-a... at bestiaria.com)
>                 HTTP://www.bestiaria.com/

As far as know, since I'm the major user of my PC it runs under my
account (computer administrator).   It even asked for the password for
my account when I added this scheduled task.
Any further ideas?
Thanks,
Jim



From steve at holdenweb.com  Sat Sep 15 17:49:54 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 15 Sep 2007 17:49:54 -0400
Subject: Python statements not forcing whitespace is messy?
In-Reply-To: <1189890755.870694.29790@r29g2000hsg.googlegroups.com>
References: <1189884110.006272.240840@50g2000hsm.googlegroups.com>	<mailman.589.1189887114.2658.python-list@python.org>
	<1189890755.870694.29790@r29g2000hsg.googlegroups.com>
Message-ID: <fchk22$sfi$1@sea.gmane.org>

buffi wrote:
> On Sep 15, 10:11 pm, "J. Cliff Dyer" <j... at sdf.lonestar.org> wrote:
>> buffi wrote:
>>> Am I the only one that thinks that python statements should force
>>> whitespace before and after them?
>>> Right now this is not enforced and for an example these statements are
>>> valid
>>> print"hello"
>>> "foo"if"bar"else"foobar"
>>> for(x,y)in[(1,2),(3,4)]:print(x,y)
>>> [(y)for(x,y)in[("foo",2),("bar",4)]if"foo"in(x)]
>>> ...and so on.
>> On the other hand, this is just as bad:
>>
>> [ ( y ) for ( x , y ) in [ ( "foo" , 2 ) , ( "bar" , 4 ) ] if "foo" in (
>> x ) ]
>>
>> And I'd hate to have to remember all of the rules for what can go
>> together and what can't, especially when it comes time to debug.  No.
>> I don't think it should be forced, but maybe put it in PEP8 or PEP3008.
>>
>> Also, the only thing I find thoroughly disagreeable in all of that
>> mess, is the run-ins involving " characters.  The rest are at least
>> clear at a glance what belongs where.
>>
>> Also, would you require the following?
>>
>> my_function (swallow='European')
>>
>> Because that is just an awful use of whitespace.
>>
>> Cheers,
>> Cliff
> 
> I believe that having whitespace around the builtin statements, and
> having whitespace around everything is pretty different.
> 
> There would be no downside whatsoever to enforcing this, except for
> backwards incompatibility (which is a rather huge downside but well...
> py3k is gonna break everything anyways). There obviously shouldnt be
> any limit to the maximum amount of whitespace used around statements
> (due to formatting and so on), but allowing stuff like print"hello" is
> just horrible.
> 
If you don't like it then don't write it. I've been reading this group 
on and off for about ten years and I believe your email is the first to 
point out that this is possible. Clearly it isn't something that happens 
a lot, and I don't know why you have a bug up your ass about it, as the 
Americans say.

The Python philosophy is to be permissive, and to expect individual 
users to write readable Python. Since they obviously do (one message in 
ten years providing a counter-example) I think you are wasting your time 
and energy on this.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From http  Wed Sep 12 19:03:40 2007
From: http (Paul Rubin)
Date: 12 Sep 2007 16:03:40 -0700
Subject: An ordered dictionary for the Python library?
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
Message-ID: <7xzlzrtrjn.fsf@ruckus.brouhaha.com>

Mark Summerfield <m.n.summerfield at googlemail.com> writes:
> I feel that Python lacks one useful data structure: an ordered
> dictionary.
> Do other Python programmers feel this lack? Is this worth a PEP?

Yes.  It should use a functional data structure.


From robin at NOSPAMreportlab.com  Sun Sep 30 11:54:12 2007
From: robin at NOSPAMreportlab.com (Robin Becker)
Date: Sun, 30 Sep 2007 16:54:12 +0100
Subject: Create a string array of all comments in a html file...
In-Reply-To: <1191166775.660477.97840@o80g2000hse.googlegroups.com>
References: <1191166775.660477.97840@o80g2000hse.googlegroups.com>
Message-ID: <46FFC6A4.6040200@jessikat.plus.net>

sophie_newbie wrote:
> Hi, I'm wondering how i'd go about extracting a string array of all
> comments in a HTML file, HTML comments obviously taking the format
> "<!-- Comment text here -->".
> 
> I'm fairly stumped on how to do this? Maybe using regular expressions?
> 
> Thanks.
> 
You should probably eat beautiful soup at

http://www.crummy.com/software/BeautifulSoup/documentation.html

which helps with this sort of task.
-- 
Robin Becker


From ptmcg at austin.rr.com  Sun Sep 16 11:36:42 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Sun, 16 Sep 2007 08:36:42 -0700
Subject: Cannot formulate regex
In-Reply-To: <mailman.610.1189955906.2658.python-list@python.org>
References: <mailman.610.1189955906.2658.python-list@python.org>
Message-ID: <1189957002.841152.178850@o80g2000hse.googlegroups.com>

On Sep 16, 10:18 am, "Dotan Cohen" <dotanco... at gmail.com> wrote:
> I'd like to filter spam from a certain company. Here are examples of
> strings found in their spam:
> Mega Dik
> Mega D1k
> MegaDik
> Mega. Dik
> M eg ad ik
> M E _G_A_D_ IK
> M_E_G. ADI. K
>
> I figured that this regex would match all but the second example, yet
> it matches none:
> |[^a-z]m[^a-z]e[^a-z]g[^a-z]a[^a-z]d[^a-z]i[^a-z]k[^a-z]|i
>
> What would be the regex that matches "megadik" regardless of whatever
> characters are sprinkled throughout?
>
> Thanks in advance.
>
> Dotan

In your regex, every occurrence of "[^a-z]" requires a single
character not in the a-z range.  So what you have *should* match
"M*E*G*A*D*I*K" (an unfortunate pr0n sequel to "M*A*S*H"?), but not
any of your examples.  You will need to add an '*' character to your
[^a-z]'s, as in:

[^a-z]*m[^a-z]*e[^a-z]*g[^a-z]*a[^a-z]*d[^a-z]*i[^a-z]*k[^a-z]*

to indicate "0 or more" repetitions of [^a-z].

Also, I would omit the leading and trailing "[^a-z]*"s - I think they
will significantly slow down your regex.

-- Paul



From aisaac at american.edu  Wed Sep  5 23:31:43 2007
From: aisaac at american.edu (Alan Isaac)
Date: Thu, 06 Sep 2007 03:31:43 GMT
Subject: Any syntactic cleanup likely for Py3? And what about doc
	standards?
In-Reply-To: <87ejhc8z23.fsf@wilson.homeunix.com>
References: <46DEFD2E.5050205@sbcglobal.net>	<mailman.112.1189022368.2658.python-list@python.org>	<87tzq898e2.fsf@wilson.homeunix.com>	<mailman.118.1189034379.2658.python-list@python.org>
	<87ejhc8z23.fsf@wilson.homeunix.com>
Message-ID: <zwKDi.10347$kI5.1097@trnddc08>

Torsten Bronger wrote: 
> I like to use properties.  However, Python already
> has properties.  Their syntax is quite nice in my opinion, and
> rather explicit, too.  

Yes.

> Their only flaw is that they are not
> "virtual" (in C++ speak).  In other words, you can't pass a "self"
> parameter to them.

http://www.kylev.com/2004/10/13/fun-with-python-properties/

fwiw,
Alan Isaac


From __peter__ at web.de  Wed Sep 19 09:45:45 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 19 Sep 2007 15:45:45 +0200
Subject: Keeping a database connection with a Singleton?
References: <1190208406.041953.115580@g4g2000hsf.googlegroups.com>
Message-ID: <fcr969$c8g$02$1@news.t-online.com>

exhuma.twn wrote:

> I remember reading about the Singleton pattern in python and how it's
> an unpythonic pattern and all. At the time I did not need the
> Singleton anyways, so I just glanced over the document.
> 
> But, setting this aside: I have an application where I have a
> connection to a database. At some point in the application I open up a
> new window. The new windows resides in a different module. So I have a
> directory structure like this:
> 
> - mainapp.py
> - newwindow.py
> 
> So I import "newwindow" in "mainapp"  so I can instantiate and display
> it. Meanwhile, the main-app has an open connection to the database.
> What's the cleanest way to hand this connection to the new window? I
> can see several possibilities:
> 
> 1) Simply pass the connection as paramtere to the constructor of new-
> window.
> 2) Use the "Singleton" deisign pattern to keep a reference to the
> connection
> 3) Open up a completely new connection to the database in the new
> window.
> 
> Now, option 1) is clearly the easiest to implement, however, I somehow
> tend to use option 2 (the singleton) as it's more flexible. Option 3
> looks ugly to me.
> 
> This is a stuation I run into many times. And I am always faced with
> the same choice. And I never know which one to chose. And now that I
> am getting more and more comfortable with the basics of python, I
> would like to know if I am missing something more "pythonic".
> 
> So, what would you recommend?

Passing the connection as a parameter is the best approach because it
keeps the dependencies explicit. Also, it allows you to switch between
singleton and one connection per window without ever touching the newwindow
module.

By the way, there is a pythonic (near) singleton: the module. So if you go
with option 2, just move the connection setup into a separate module that
you can import into client code.

Peter


From jstroud at mbi.ucla.edu  Fri Sep 14 21:19:45 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 14 Sep 2007 18:19:45 -0700
Subject: How to avoid overflow errors
In-Reply-To: <13em8vnr527rq20@corp.supernews.com>
References: <13em8vnr527rq20@corp.supernews.com>
Message-ID: <fcfbj0$br$1@daisy.noc.ucla.edu>

Steven D'Aprano wrote:
> I thought that overflow errors would be a thing of the past now that 
> Python automatically converts ints to longs as needed. Unfortunately, 
> that is not the case.
> 
>>>> class MyInt(int):
> ...     pass
> ...
>>>> MyInt(sys.maxint)
> 2147483647
>>>> MyInt(sys.maxint+1)
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> OverflowError: long int too large to convert to int
> 
> 
> How do I subclass int and/or long so that my class also auto-converts 
> only when needed?
> 
> 
> 

Use __new__.

py> import sys
py>
py> class MyLong(long):
...   pass
...
py> class MyInt(int):
...   def __new__(cls, *args, **kwargs):
...     try:
...       return int.__new__(cls, *args, **kwargs)
...     except OverflowError:
...       return MyLong(*args, **kwargs)
...
py> MyInt(sys.maxint**2)
4611686014132420609L
py> type(_)
<class '__main__.MyLong'>


James


From michele.simionato at gmail.com  Thu Sep 13 01:08:56 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Wed, 12 Sep 2007 22:08:56 -0700
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <1i4bnbp.1l8sr3mjdojghN%aleax@mac.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189604018.520338.162520@57g2000hsv.googlegroups.com>
	<46e7f450$0$12305$426a74cc@news.free.fr>
	<1189608231.151112.147550@y42g2000hsy.googlegroups.com>
	<mailman.444.1189611299.2658.python-list@python.org>
	<1i4bnbp.1l8sr3mjdojghN%aleax@mac.com>
Message-ID: <1189660136.689766.295350@d55g2000hsg.googlegroups.com>

On Sep 12, 1:05 pm, al... at mac.com (Alex Martelli) wrote:
> Making, say, 'a' hiddenly mean 'x.a', within a function, requires a
> decorator that suitably rewrites the function's bytecode... (after
> which, it WOULD still be terrible and horrible and not to be used, just
> as you say, but it might at least _work_;-).  Main problem is, the
> decorator needs to know the set of names to be "faked out" in this
> terrible and horrible way at the time the 'def' statement executes: it
> can't wait until runtime (to dynamically determine what's in var(self))
> before it rewrites the bytecode

All right Alex, and since I had 20 minutes of spare
time I implemented the decorator you are talking about by
using the wonderful byteplay module ;) Here it is:


import dis
from byteplay import Code, LOAD_GLOBAL, LOAD_ATTR, LOAD_FAST,
STORE_FAST

def instance2local(varname):
    yield LOAD_FAST, 'self'
    yield LOAD_ATTR, varname
    yield STORE_FAST, varname

def declare_instance_vars(*varnames):
    def dec(f):
        c = Code.from_code(f.func_code)
        # change LOAD_GLOBAL -> LOAD_FAST
        for i, (opcode, value) in enumerate(c.code):
            if opcode == LOAD_GLOBAL and value in varnames:
                c.code[i] = (LOAD_FAST, value)
        # insert instance2local assigments at the beginning
        assignments = []
        for varname in varnames:
            for pair in instance2local(varname):
                assignments.append(pair)
        c.code[0:0] = assignments
        # redefine the code object
        f.func_code = c.to_code()
        return f
    return dec

class Test(object):
    def __init__(self):
        self.a = 1
        self.b = 2

    def test1(self):
        a = self.a
        b = self.b
        return a * b

    @declare_instance_vars('a', 'b')
    def test2(self):
        return a * b


co1 = Test.__dict__['test1'].func_code
co2 = Test.__dict__['test2'].func_code

print 'bytecode for test1'
dis.dis(co1)
print 'bytecode for test2'
dis.dis(co2)

t = Test()
assert t.test1() == t.test2()

It is still a hack, since one is not supposed to mess around
with bytecodes, but at least it seems to work ;) [warning:
I have not tested it more than you see]

        Michele Simionato



From neilscad at hotmail.com  Sat Sep 29 05:25:02 2007
From: neilscad at hotmail.com (neil)
Date: Sat, 29 Sep 2007 21:25:02 +1200
Subject: python 2.5 and 3gb switch
References: <fdkan6$ne0$1@aioe.org> <fdkfqb$qr$1@daisy.noc.ucla.edu>
	<fdkq8g$vj2$1@aioe.org> <46FDF800.5030504@v.loewis.de>
Message-ID: <fdl5lg$una$1@aioe.org>

no sir nothing spectacular like that,
I'll explain further -
The .blend file I have is 550mb
It originates from 13,000+ meshes imported from Solidworks ( 3d CAD program) 
of a piece of machinery. A python script was used for this purpose -it also 
performed some other tasks on the meshes like matching materials from a 
library and identifying sharp edges for normals in the renderer.
This part was not a problem - the commit space reached 2,4 gb
The next step is to export it in parts of about 2 million faces each in a 
file format Indigo uses.
I need to save and reopen to unload commit space to do that... this means I 
have about 1.4gb commit.
If I start the export script it will run fine until just about the end - 
this consumes another 700mb - ( I have the max MS recommends -2.9gb- set in 
the 3gb switch to play with and I actually know this is the limit cos I've 
hit that too..)
Right at this point I still have 800mb available but here's the kicker - It 
needs about the same 550mb to complete the save.I know this from previous 
work on lesser files.
This is where python gives 'memerror'. Although the space is there it wont 
use it.
I believe I should be using Python that is 3gb enabled as well
This is the same error I ran across doing smaller tasks without the switch
btw Blender does not crash.
HTH
Neil 




From bignose+hates-spam at benfinney.id.au  Wed Sep 12 20:44:28 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 13 Sep 2007 10:44:28 +1000
Subject: Coming from Perl
References: <Cv%Fi.198$372.59@read2.cgocable.net>
Message-ID: <87wsuv5r83.fsf@benfinney.id.au>

Amer Neely <perl4hire at softouch.on.ca> writes:

> A question I have, if someone here is familiar with Perl, does Python
> have something like Perl's 'here document'?

I'm not sure exactly what behaviour you want, but Python accepts
literal strings to be triple-quoted (i.e. delimited by """ pairs or
''' pairs), which allows you to freely use literal line feed and quote
characters inside that string.

    <URL:http://docs.python.org/ref/strings.html>

-- 
 \     "Are you pondering what I'm pondering?" "I think so, Brain, but |
  `\    pants with horizontal stripes make me look chubby."  -- _Pinky |
_o__)                                                   and The Brain_ |
Ben Finney


From alain.barthe.65 at free.fr  Sat Sep 22 17:32:27 2007
From: alain.barthe.65 at free.fr (Alain)
Date: Sat, 22 Sep 2007 23:32:27 +0200
Subject: too many values with string.split
In-Reply-To: <mailman.931.1190494854.2658.python-list@python.org>
References: <mailman.931.1190494854.2658.python-list@python.org>
Message-ID: <46f589d8$0$9504$426a34cc@news.free.fr>

Shawn Minisall a ?crit :
> I'm trying to unpack a list of 5 floats from a list read from a file and 
> python is telling me 5 variables are too many for the string.split 
> statement.  Anyone have any other idea's?  NOTE: the only reason I 
> convert it to a float instead of just leaving it as a string in the loop 
> is because I have to have it printed out as a float besides the names 
> and then the average displayed underneath
> 
> thx
> 
>    #read in data line by line
>    for line in infile:
>        mylist = string.split(line)
>        firstName[counter] = mylist[0]
>        lastName[counter] = mylist[1]
>        grades[counter] = float(mylist[2])
>        print firstName[counter], 
> lastName[counter],":","\t\t",grades[counter]
>        #increment counter
>        counter = counter + 1
> 
>    #calculates and prints average score
>    grades = str(grades)
>    num1, num2, num3, num4, num5 = string.split(grades,",")
>    average = float(num1 + num2 + num3 + num4 + num5) / 5
>    print
>    print "Average:"

As I can see, grades is a string that looks like '[12.0,12.0, ...]'

So you can't split it just with string.split ()

Rather than doing grades = str(grades) and split it,
you have just to do :

avarage = sum (grades) / len (grades)


From koutoo at hotmail.com  Mon Sep 24 15:28:07 2007
From: koutoo at hotmail.com (koutoo at hotmail.com)
Date: Mon, 24 Sep 2007 12:28:07 -0700
Subject: Nested For and While Statements
Message-ID: <1190662087.403000.16290@g4g2000hsf.googlegroups.com>

I start my code with some constants then a while statement.  But I
have some For statements towards the end within the While statement
where I start getting some errors.  I'm hoping I won't have to post my
code, but it looks something like this:

Import os, string

while this:

     All Code indented like it should


     Last line in While.

           For i in range(1)
                class = []
                class2 = []
                For i in range(2)
                     Do this
                     And this
                     And that.

                     Next Line hits snag here?  Where should this line
be?



From paddy3118 at googlemail.com  Sat Sep  1 03:30:26 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Sat, 01 Sep 2007 07:30:26 -0000
Subject: list index() (OT) and definitely trolling :-)
In-Reply-To: <mailman.252.1188628377.28954.python-list@python.org>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<1188497498.3468.60.camel@dot.uniqsys.com>
	<mailman.188.1188546300.28954.python-list@python.org>
	<0v2dnaYWyv4HWkrbnZ2dnUVZ_oTinZ2d@speakeasy.net>
	<1188551958.728836.137370@x35g2000prf.googlegroups.com>
	<fOadnfwlCJbQfErbnZ2dnUVZ_jCdnZ2d@speakeasy.net>
	<6ftgd35rd1g4mddqg2f44d7svd4r85ev17@4ax.com>
	<13dhvs3p5drsd99@corp.supernews.com>
	<mailman.252.1188628377.28954.python-list@python.org>
Message-ID: <1188631826.355736.206920@k79g2000hse.googlegroups.com>

On Sep 1, 7:32 am, Steve Holden <st... at holdenweb.com> wrote:
> Dennis Lee Bieber wrote:
> > On Fri, 31 Aug 2007 21:15:10 +0100, DaveM <asm... at dsl.pipex.com>
> > declaimed the following in comp.lang.python:
>
> >> No - but I would pronounce "lever" and "fever" the same way, if that helps.
>
> >    <shudder> To me, those are different... I suppose you also add an
> > extra "i" to aluminum <G>
>
> No, he just spells it with two i's like sensible people do. Who would
> ever want *three* I's in "aluminium" (which, by the way, you misspelled ;-)?
>
> Such things are matters of practical significance to me, since I have
> adopted a policy of using English spelling when in the UK and US
> spelling when elsewhere. Since I am now pretty much full-time in the US,
> I am finally having to come to terms with its crazy spelling.
>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
> --------------- Asciimercial ------------------
> Get on the web: Blog, lens and tag the Internet
> Many services currently offer free registration
> ----------- Thank You for Reading -------------

Since the language that inspired the programming language is most
definitely English as spoken in the UK, could it be that the highest
levels of Pythonistic Nirvana are to be reached only by ....
Nah - can't do it! (just spell colour right and I'll be OK).

- Paddy.



From lasses_weil at klapptsowieso.net  Sat Sep  8 07:16:13 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Sat, 08 Sep 2007 13:16:13 +0200
Subject: unexpected behavior: did i create a pointer?
In-Reply-To: <13e4db4lp4tce86@corp.supernews.com>
References: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>	<46e11dfe$0$4517$9b4e6d93@newsspool3.arcor-online.net>	<pan.2007.09.07.10.40.46@REMOVE.THIS.cybersource.com.au>	<fbrdsm$5f3$01$1@news.t-online.com>
	<13e2jdobu2kqkf1@corp.supernews.com>
	<mailman.250.1189192765.2658.python-list@python.org>
	<13e4db4lp4tce86@corp.supernews.com>
Message-ID: <46e2847d$0$30384$9b4e6d93@newsspool4.arcor-online.net>

Dennis Lee Bieber wrote:
> On Fri, 07 Sep 2007 12:19:12 -0700, Steve Holden <steve at holdenweb.com>
> declaimed the following in comp.lang.python:
> 
>> Since it's only a matter of time before someone brings up the "post-It" 
>> analogy, let me cavil in advance about it. The thing I don't like about 
>> that particular pedagogic mechanism is that it always "attaches" the 
>> names to the objects.
>>
> 	Fine... then visual the namespace as a box... Inside the box are the
> "post-it notes" -- attached to the ends of strings that then run to the
> "physical object" at the other end.

This is getting clearer by the minute. ;)

/W


From pydecker at gmail.com  Tue Sep 25 12:19:11 2007
From: pydecker at gmail.com (Peter Decker)
Date: Tue, 25 Sep 2007 12:19:11 -0400
Subject: An Editor that Skips to the End of a Def
In-Reply-To: <46F8FC3D.6050700@holdenweb.com>
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk> <fd0au1$fro$1@lust.ihug.co.nz>
	<5lhs4pF8bkunU1@mid.individual.net> <fd4168$ige$1@lust.ihug.co.nz>
	<slrnfff9op.1is.horpner@FIAD06.norwich.edu>
	<fd9ncb$q3l$1@lust.ihug.co.nz> <5ls313F9ndm1U1@mid.individual.net>
	<46F8FC3D.6050700@holdenweb.com>
Message-ID: <ca55a9900709250919x7a215ddcy371119bdec9c3878@mail.gmail.com>

On 9/25/07, Steve Holden <steve at holdenweb.com> wrote:

> >> Why does it "choose" to modify your position when you exit insert
> >> mode? Does the phrase "broken as designed" mean anything to you?
> >
> > Does the phrase "everything I don't like is stupid" mean anything to
> > you? Honestly, if you don't like it, either propose improvement or
> > stop using it (and complaining about it). Your preference with user
> > interfaces is obviously different. (Personally, I prefer single
> > strokes to breaking my fingers with Esc-Meta-Alt-Control-Shift.
> > :) )
> >
> Does "this non-Python related twaddle is boring the shit out of me" mean
> anything to you both?

+1 QOTW!!

-- 

# p.d.


From carsten at uniqsys.com  Wed Sep 26 11:54:15 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Wed, 26 Sep 2007 11:54:15 -0400
Subject: regex with specific list of string
In-Reply-To: <1190821357.753909.178210@50g2000hsm.googlegroups.com>
References: <1190821357.753909.178210@50g2000hsm.googlegroups.com>
Message-ID: <1190822055.3397.52.camel@dot.uniqsys.com>

On Wed, 2007-09-26 at 15:42 +0000, james_027 wrote:
> hi,
> 
> how do I regex that could check on any of the value that match any one
> of these ... 'jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug',
> 'sep', 'oct', 'nov', 'dec'

Why regex? You can simply check if the given value is contained in the
set of allowed values:

>>> s = set(['jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug',
'sep', 'oct', 'nov', 'dec'])
>>> 'jan' in s
True
>>> 'spam' in s
False

HTH,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From zzbbaadd at aol.com  Tue Sep  4 05:46:16 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Tue, 04 Sep 2007 02:46:16 -0700
Subject: parameter list notation
In-Reply-To: <Xns99A157CCCCB25duncanbooth@127.0.0.1>
References: <1188882028.165803.316540@r34g2000hsd.googlegroups.com>
	<Xns99A157CCCCB25duncanbooth@127.0.0.1>
Message-ID: <1188899176.091592.247360@50g2000hsm.googlegroups.com>

Steve, Ben, Duncan,

Thanks for the replies.

TFD




From arvind1.singh at gmail.com  Thu Sep 20 22:46:27 2007
From: arvind1.singh at gmail.com (Arvind Singh)
Date: Fri, 21 Sep 2007 08:16:27 +0530
Subject: Killing A Process By PID
In-Reply-To: <5970333469768353093@unknownmsgid>
References: <5970333469768353093@unknownmsgid>
Message-ID: <c19402930709201946qc8828f7h3725b4dd8c4b3823@mail.gmail.com>

 file('/var/lock/Application.lock', 'w').write(str(os.getpid()))
>
>  Which to be honest appears to run just fine, when I look in that file it
> always contains the correct process ID, for instance, 3419 or something like
> that.
>
I honestly doubt that. The I/O is buffered and you need to flush()/close()
the file. Otherwise data may not get written until python interpreter exits.

      if file('/proc/%s/cmdline' % pid).read().endswith('python'):
>
>             os.system('kill %s' % pid)
>
Are you sure about endswith('python')?
Maybe you need find('python') != -1.

-- 
Regards,
Arvind
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From xiaoyisheng at gmail.com  Thu Sep 13 21:00:01 2007
From: xiaoyisheng at gmail.com (Pacino)
Date: Fri, 14 Sep 2007 01:00:01 -0000
Subject: read part of jpeg file by pure python
In-Reply-To: <1189683855.168075.325770@o80g2000hse.googlegroups.com>
References: <1189671634.712690.154580@o80g2000hse.googlegroups.com>
	<fcat76$vnc$1@news2.u-psud.fr>
	<1189673325.083163.210630@d55g2000hsg.googlegroups.com>
	<1189683855.168075.325770@o80g2000hse.googlegroups.com>
Message-ID: <1189731601.307114.231020@19g2000hsx.googlegroups.com>

On 9 13 ,   7 44 , michal.zaborow... at gmail.com wrote:
> On 13 Wrz, 10:48, Pacino <xiaoyish... at gmail.com> wrote:
>
>
>
> > On 9 13 ,   4 43 , Laurent Pointal <laurent.poin... at limsi.fr> wrote:
>
> > > Pacino a ?crit :
>
> > > > Hi, everyone,
>
> > > > I am wondering whether it's possible to read part (e.g. 1000*1000) of
> > > > a huge jpeg file (e.g. 30000*30000) and save it to another jpeg file
> > > > by pure python. I failed to read the whole file and split it, because
> > > > it would cost 2GB memory.
>
> > > > Can anyone help me? Any comments would be appreciated.
>
> > > Just reading parts of the *file* is easy (see tell() seek() and read()
> > > methods on files).
> > > But to extract a part of the *picture*, you must uncompress the picture
> > > in memory, grab the sub-picture, and save it back - generally with
> > > compression. I can't see how you can bypass the uncompress/compress
> > > phases and the corresponding memory use.
>
> > The most difficult part is the uncompress part. I don't want the whole
> > picture to be uncompressed in the memory, because it will consume a
> > lot of memory (2GB, as I mentioned). My goal is to uncompress part of
> > the picture into the memory.
>
> > I just read some article on this subject (http://mail.python.org/
> > pipermail/image-sig/1999-April/000713.html) , but haven't test it out
> > yet.
>
>   I have no idea what it does. Anyway - jpeg:
> 1. RGB -> HLV
> 2. divide data into 8x8 - blocks of data.
> 3. blocks are treated with discrete cosine transform.
> 4. Result is filtered to remove "fast changes".
> 5. Then result is compressed with Huffman alg.
>
> So to get part of image - you can take smaller image before step 4.
> As far as I understand code presented at:http://mail.python.org/pipermail/image-sig/1999-April/000713.html
> - full image will be loaded, and cutted.
>
> --
> Regards,
>   Micha? Zaborowski (TeXXaS)-         -
>
> -         -

Thanks. Seems no ways to achieve the requirements.



From fredrik at pythonware.com  Wed Sep 26 04:09:46 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 26 Sep 2007 10:09:46 +0200
Subject: Regular Expressions: Can't quite figure this problem out
In-Reply-To: <496954360709251516teda6f2dwe8190236029e3688@mail.gmail.com>
References: <496954360709241737o6e42e7efk29886b5631f6ca2e@mail.gmail.com>	<a49e45f50709241827i107d0acav28431853ef403702@mail.gmail.com>	<496954360709241853w6bb6e813ved0ec4fc80304d51@mail.gmail.com>	<op.ty6tjyfqx6zn5v@gabriel2.softlabbsas.com.ar>	<496954360709241917m3801e4aavee29cfef7deaf41b@mail.gmail.com>	<fd9rs6$8b2$1@sea.gmane.org>	<496954360709241951h6901d60etf2c4b3b5ec759f2a@mail.gmail.com>	<op.ty6ztgx0x6zn5v@gabriel2.softlabbsas.com.ar>	<496954360709251421l578b9dfdwcc0e67d293ede1f3@mail.gmail.com>
	<496954360709251516teda6f2dwe8190236029e3688@mail.gmail.com>
Message-ID: <fdd44b$u1p$1@sea.gmane.org>

Robert Dailey wrote:

> Hmm, ElementTree.tostring() also adds a space between the last character 
> of the element name and the />. Not sure why it is doing this.

ET is commonly used to generate (X)HTML fragments, and that space 
provides partial HTML compatibility.

since the default serializer never generates CDATA sections, it should 
be safe to simply do a text.replace(" />", "/>") on the resulting string.

</F>



From michele.simionato at gmail.com  Wed Sep  5 01:35:37 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Tue, 04 Sep 2007 22:35:37 -0700
Subject: doctest and decorators
In-Reply-To: <mailman.56.1188949595.2658.python-list@python.org>
References: <2bfa72fa0709041329i14b5b547i2eb85250f7547da@mail.gmail.com>
	<200709042316.08263.python@cx.hu>
	<2bfa72fa0709041452o72d9a98fp939852d061a2cda3@mail.gmail.com>
	<200709050009.46380.python@cx.hu>
	<2bfa72fa0709041529g9d5ac22hce3a55d5357b1a1c@mail.gmail.com>
	<mailman.56.1188949595.2658.python-list@python.org>
Message-ID: <1188970537.297655.256600@r34g2000hsd.googlegroups.com>

> En Tue, 04 Sep 2007 19:29:11 -0300, Daniel Larsson
> <daniel.j.lars... at gmail.com> escribi?:
>
>
>
> > On 9/5/07, Ferenczi Viktor <pyt... at cx.hu> wrote:
>
> >> > > @functools.wraps(f)
> >> > > Pass the function to be wrapped by the decorator to the wraps
> >> function.
> >> > Ooops, right. That doesn't change the fact that decorated functions
> >> get
> >> > hidden from doctest though.
>
> > I have no issue when the decorator is defined in the same module as the
> > decorated function, my problem is running doctests on functions using an
> > imported decorator. Having to implement the decorator in every source
> > module
> > isn't very practical.

I cannot reproduce your problem. Using functools.wraps
the __module__ attribute is set correctly and everything
works, even for decorators defined in separated modules.
Care to post a complete example of what you are doing?

         Michele Simionato

P.S. for some reason your messages are not appearing on
Google groups, I see only the replies.



From daniel.j.larsson at gmail.com  Wed Sep  5 07:47:50 2007
From: daniel.j.larsson at gmail.com (Daniel Larsson)
Date: Wed, 5 Sep 2007 13:47:50 +0200
Subject: Accessing Module variables from another Module
In-Reply-To: <1188981521.735630.133060@r29g2000hsg.googlegroups.com>
References: <1188981521.735630.133060@r29g2000hsg.googlegroups.com>
Message-ID: <2bfa72fa0709050447p1432a39dna3c2362aed542d32@mail.gmail.com>

On 9/5/07, cjt22 at bath.ac.uk <cjt22 at bath.ac.uk> wrote:
>
> Hi
>
> I am new to Python (I have come from a large background of Java) and
> wondered if someone could explain to me how I can access variables
> stored in my main module to other functions within other modules
> called
> from this module


No, don't introduce circular dependencies, and make it explicit what your
functions operate on by passing things as parameters, instead of using
global references.

for example
> file: main.py
>
> from Storage import store
> from Initialise import init
> from ProcessSteps import process
>
> storeList = store()   #Creates a object to store Step objects
> init()
> process()


It is *much* more preferable to pass 'storeList' as a parameter to your
functions. Don't change things behind the scenes.

file: Initialise.py
> def init()
>     ......
>     storeList.addStep([a,b,c])
>
>
> file: ProcessSteps.py
> def process()
>     for step in storeList.stepList:
>     etc
>
> I am currently just passing the variable in as a parameter
> but I thought with Python there would be a way to gain direct access
> to
> storeList within the modules called from the top main module?


Keep it the way it is. It's wrong on too many levels to do it the other way.

Cheers
> Chris
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From joe at goldthwaites.com  Thu Sep 27 17:56:03 2007
From: joe at goldthwaites.com (Joe Goldthwaite)
Date: Thu, 27 Sep 2007 14:56:03 -0700
Subject: A question on python performance.
In-Reply-To: <1190832113.527114.94230@d55g2000hsg.googlegroups.com>
Message-ID: <002f01c80151$33c73090$6c01a8c0@applexp>

chris.monsanto at gmail.com wrote:

>Makes perfect sense to me! Think about it:
>
>method 1: looks up the method directly from the object (fastest)
>method 2: looks up __class__, then looks up __dict__, then gets the
>element from __dict__
>method 3: looks up caller, looks up __class__, looks up __dict__, gets
>element from __dict__
>
>To get the element directly from the object (method 1), Python has to
>internally check __class__.__dict__[element], which shows why method 1
>and method 2 are nearly the same speed. The last version has to look
>up caller in addition to the process described by method 2.
>
>The best way to do what you are doing:
>
>getattr(self, param)(self, *args)

I didn't know about the getattr function. I tried to search for that
type of function but not knowing how to word the search request,
I couldn't find it.  That's a lot cleaner way of doing what I was
trying to do.  I benchmarked it and it's so close in speed to the
hard-coded method as to be identical.

Paul Hankin wrote:

>You're calling a function (getValue) that just calls a method of trend
>(caller), that just calls another method of trend (Ptd or Qtd or ...).
>You can skip all these steps, and just call the method yourself: the
>code that calls getValue(trend, param, per) replace with
>trend.<something>(per) if you're calling getValue with a static value
>for param, or getattr(trend, param)(per) if param is dynamic.

You're right, it makes sense.  Thanks for also pointing out the getattr
function.

Eric Jones wrote:

>What you're describing is a case of mulitple dispatch.  See http://
www.artima.com/weblogs/viewpost.jsp?thread=101605 for a short
>description and (as short) example by Guido.  You can probably fill
>that out and adapt it to your needs.  Alternatively, you could look
>into the multimethods module in the Gnosis Utilities package: http://
>pypi.python.org/pypi/Gnosis_Utils/1.2.1-a

Thanks Eric.  I read that article on multi-methods but I can't say I
really understand it.  I guess I still think of decorators as the people
who got the gym ready for the prom.  I've tried getting up to speed on
decorators but I haven't had much success.  Like I mentioned previously,
with Python, I still feel like a newbie.

Bruno Desthuilliers wrote:

>IOW, direct access to obj.__class__.__dict__ bypasses both inheritence
>and per-instance overriding.

Thanks for your response also Bruno. I don't understand the code you
posted well enough yet to even ask a useful question. There are a number
of things I haven't seen before.  Now I really feel like a newbie!
I'm working on it though so I may have some questions later.

Thanks again for everyone's input. I really appreciate it.








From gagsl-py2 at yahoo.com.ar  Sun Sep 23 18:01:04 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 23 Sep 2007 19:01:04 -0300
Subject: Properties and Objects...
References: <m24phm7exd.wl%gnn@neville-neil.com>
Message-ID: <op.ty4nf2arx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 22 Sep 2007 15:06:38 -0300, George V. Neville-Neil  
<gnn at neville-neil.com> escribi?:

> I have been trying to switch this over to using properties, which seem
> at first glance to be cleaner, but which I am having a lot of problems
> with.  In particular I want to add a property to an object, not a
> class.  The field list in a class is actually relatively static but I
> wind up with ugly code like:
>
> class ethernet(pcs.Packet):
>     """Ethernet"""
>     __layout__ = pcs.Layout()
>     _map = ethernet_map.map
>    src = pcs.StringField("src", 48)
>     dst = pcs.StringField("dst", 48)
>     type = pcs.Field("type", 16)
>
>     def __init__(self, bytes = None, timestamp = None):
>         """initialize an ethernet packet"""
>
>         src = pcs.StringField("src", 48)
>         dst = pcs.StringField("dst", 48)
>         type = pcs.Field("type", 16)
>
>         pcs.Packet.__init__(self, [dst, src, type], bytes = bytes)
>         self.description = inspect.getdoc(self)

You don't have to repeat the fields:

          pcs.Packet.__init__(self, [self.dst, self.src, self.type], bytes  
= bytes)

does the same thing.
And you can remove self.description=... and use (at the class level):
	description = __doc__
or:
	description = property(lambda self: self.__doc__)
to automatically enable subclases to share the definition

One could say that the field order is important so I'd finally write it as:

class ethernet(pcs.Packet):
      """Ethernet"""
      __layout__ = pcs.Layout()
      _map = ethernet_map.map
      src = pcs.StringField("src", 48)
      dst = pcs.StringField("dst", 48)
      type = pcs.Field("type", 16)
      _fields = [dst, src, type]
      description = property(lambda self: self.__doc__)

      def __init__(self, bytes = None, timestamp = None):
          """initialize an ethernet packet"""

          pcs.Packet.__init__(self, self._fields, bytes = bytes)

> and assigning the properties at class time means that it's hard to
> have variations, packets with the same name but with slightly varying
> field lists.

This is the part I don't understand. Can't you define a new class, in case  
you want a different field list? Using the above class:

class ethernet_modified(ethernet):
     """Modified ethernet class"""
     added_field = pcs.StringField("whatever", 16)
     _fields = [dst, src, type, added_field]

And it doesn't even requiere an __init__ method

> So, is there a way to assign a property to an object, like this:
>
>     def __init__(....
>          self.src = property()
>
> or something like that?

I'd use different classes for different kind of objects.

> And, failing that, is there a clean way to modify the class in it's
> __init__() method so I don't have to call the Field objects twice,
> once for the property effect and once to put into the list in the base
> Packet class?

I think my example above does what you want.

-- 
Gabriel Genellina



From zzbbaadd at aol.com  Fri Sep 14 01:44:44 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Thu, 13 Sep 2007 22:44:44 -0700
Subject: Python 3K or Python 2.9?
In-Reply-To: <13eje8gi4nt0j1e@corp.supernews.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<5ksoaoF5am8cU1@mid.individual.net>
	<1189701793.466307.93210@g4g2000hsf.googlegroups.com>
	<5ktfjqF5ctrvU2@mid.individual.net>
	<13eje8gi4nt0j1e@corp.supernews.com>
Message-ID: <1189748684.351475.3860@o80g2000hse.googlegroups.com>

> If you look at the thread "parameter list notation" from ten days or so
> ago, TheFlyingDutchman has forked Python and is working on a very special
> new language, PIEthun 3.01B.
> I for one am looking forward to seeing all
> the very special features of PIEthun.

It will be named PIEthun 3000 as it comes out of Beta. But you're not
alone. From the emails I have been receiving there is anticipation and
excitement from Mumbai to Dusseldorf to Caracas.



From luojiang2 at tom.com  Thu Sep  6 05:57:31 2007
From: luojiang2 at tom.com (Ginger)
Date: Thu, 6 Sep 2007 17:57:31 +0800
Subject: how to install python2.5.1 in a amd64 redhat linux?
Message-ID: <002b01c7f06c$578b2720$4de1a8c0@amd.com>

[gluo at oshcs12]$ make install
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall -Wstrict-prototypes  -I. -I./Include   -DPy_BUILD_CORE -o Modules/python.o ./Modules/python.c
In file included from Include/Python.h:57,
                 from Modules/python.c:3:
Include/pyport.h:734:2: #error "LONG_BIT definition appears wrong for platform (bad gcc/glibc config?)."
make: *** [Modules/python.o] Error 1

 
   Thanks and Regards,
Ginger
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From s.rappard at gmail.com  Tue Sep 11 11:49:57 2007
From: s.rappard at gmail.com (Sjoerd)
Date: Tue, 11 Sep 2007 15:49:57 -0000
Subject: mod_python and pysvn
Message-ID: <1189525797.361829.69380@g4g2000hsf.googlegroups.com>

Hello all,

I have a script that uses pySVN. It gets the latest build information.
I want to create a call to that function in a PSP file but everytime I
try I get an error message:

ClientError: Unable to open an ra_local session to URL
Unable to open repository 'file:///P:/tools/builds/repository'

does anyone know how I can fix this?

thanks in advance!
Sjoerd



From robert.kern at gmail.com  Thu Sep 20 03:22:50 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 20 Sep 2007 02:22:50 -0500
Subject: distutils, extensions, and missing headers
In-Reply-To: <1190268535.052437.226240@v23g2000prn.googlegroups.com>
References: <1190268535.052437.226240@v23g2000prn.googlegroups.com>
Message-ID: <fct74c$bba$1@sea.gmane.org>

Gary Jefferson wrote:
> My setup.py (with extension) seems to work great for build and
> install, but for bdist_rpm, compilation of the extension fails because
> some of the headers needed to build the extension aren't in the bdist
> tarball.
> 
> I've tried adding a 'depends=[]' to the Extension definition with
> these header files present, but they still don't get put in the
> tarball.
> 
> What's the key to getting headers or other [non-python] files included
> in a bdist?

Use the "headers" keyword to setup() to list the header files you want installed.

For other files, it depends on where you need them to go. If you want the data
files to be inside the package, you should use the "package_data" keyword. It
was introduced in Python 2.4, so if you need to support pre-2.4 Pythons, there
are recipes floating around to do so more nicely.

  http://docs.python.org/dist/node12.html

For other things (and hopefully, you can live with package data), use "data_files":

  http://docs.python.org/dist/node13.html

-- 
Robert Kern

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



From __peter__ at web.de  Fri Sep 21 02:23:53 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 21 Sep 2007 08:23:53 +0200
Subject: UTF-8 characters in doctest
References: <1190202459.229197.297350@n39g2000hsh.googlegroups.com>
	<fcr3u9$l32$03$2@news.t-online.com> <878x71jfwo.fsf@pobox.com>
Message-ID: <fcvo1o$dg5$03$1@news.t-online.com>

John J. Lee wrote:

> Peter Otten <__peter__ at web.de> writes:
> [...]
>> # -*- coding: utf8 -*-
>> r"""
>>>>> f("???".decode("utf8"))
>> (u'\xe4\xf6\xfc',)
>> """
>> def f(s):
>>     return (s,)
> 
> Forgive me if this is a stupid question, but: What purpose does
> function f serve?

Like the OP's get_inventary_number() it takes a unicode string and
returns a tuple of unicode strings. I'ts pointless otherwise. I hoped I
had stripped down his code to a point where the analogy was still
recognizable.

Peter


From dotancohen at gmail.com  Tue Sep 11 20:45:12 2007
From: dotancohen at gmail.com (Dotan Cohen)
Date: Wed, 12 Sep 2007 03:45:12 +0300
Subject: wx module?
Message-ID: <880dece00709111745p2f816833j8f2cdaf2113633ee@mail.gmail.com>

Where can I find a wx module for Python? I'm trying to run taskcoach,
but I cannot find this package. Thanks.

ubuntu at ubuntu-laptop:~/Desktop/todo-manager-0.75.1/todo-manager-0.75.1$
taskcoach.py
Traceback (most recent call last):
  File "/usr/bin/taskcoach.py", line 24, in <module>
    import wx
ImportError: No module named wx
ubuntu at ubuntu-laptop:~/Desktop/todo-manager-0.75.1/todo-manager-0.75.1$


Dotan Cohen

http://what-is-what.com
http://gibberish.co.il


From tokland at gmail.com  Thu Sep 20 10:22:11 2007
From: tokland at gmail.com (tokland at gmail.com)
Date: Thu, 20 Sep 2007 14:22:11 -0000
Subject: os.popen and lengthy operations
In-Reply-To: <mailman.789.1190269908.2658.python-list@python.org>
References: <mailman.789.1190269908.2658.python-list@python.org>
Message-ID: <1190298131.265147.292350@g4g2000hsf.googlegroups.com>

On 20 sep, 08:31, "Dmitry Teslenko" <dtesle... at gmail.com> wrote:

> I'm using os.popen to perform lengthy operation such as building some
> project from source.

> def execute_and_save_output( command, out_file, err_file):
>         (i,o,e) = os.popen3( command )

You should consider using the higher-level "subprocess" module:

import subprocess

def run(command, output, error, bufsize=None):
    popen = subprocess.Popen(command.split(), bufsize=bufsize,
        stdout=output, stderr=error)
    popen.communicate()
    return popen.returncode

example:

create = lambda path: open(path, "w")
run("ls /etc/services abc", create("/tmp/output"), create("/tmp/
error"))

Check how to use the "bufsize" parameter in the docs:

http://docs.python.org/lib/node529.html

arnau



From fakeaddress at nowhere.org  Sat Sep 22 15:12:31 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Sat, 22 Sep 2007 19:12:31 GMT
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
Message-ID: <zOdJi.35091$RX.24066@newssvr11.news.prodigy.net>

Cristian wrote:
> [...] Specifically, he's having trouble
> thinking of functions as first order data (don't worry, I haven't
> confused him with such terminology yet). 
[...]
> And, after we finally
> get a hold of first order functions, we appreciate its incorporation
> into languages. It would be a shame if my friend just learns the
> motions and never incorporates first order functions into his
> programs. 


The terminology I've heard for this is that functions are
"first-class values". There's a minor name-collision on
"class", but people have heard "first-class" in other
contexts, and it means the same thing here: no second-class
status for such values.

"First order" has other usages, some contradicting what you
mean. First-order functions are exactly those that cannot
take functions as arguments. It would be a shame if your
friend never incorporates *higher order* functions.
[http://en.wikipedia.org/wiki/Higher-order_function]


[...]
> my_function = function(foo, bar): pass
> an_instance_method = function(self, foo): pass
> a_method_declaration = method(self, foo): pass

I just argued for adopting mainstream terminology, but here
I like yours better. The keyword "lambda" sucks. All the
other keywords, having been so carefully chosen to relate
to their conversational usage, have mis-trained to look
at this spelling-out of the name of an arbitrary symbol.

Alonzo Church's calculus used the *symbol*. He just needed
it to be distinct. Could as well have been the '$-calculus'.

Function-as-value is not a trivial concept. I remember
wrestling with it, and I've seen many others do the same.
The 'lambda' keyword is so awful as to pass for deep
mystery long after students have grasped first-class
functions.


"function" would be a much better keyword. Or follow ML and
abbreviate to "fn", or choose another term that clues one
in to the meaning. I'd have caught on much quicker given a
a hint to read:

    lambda x, y: x + y

as: "the function of two variables, call them x and y, that
returns x + y."


--Bryan


From duncan.booth at invalid.invalid  Tue Sep  4 03:27:54 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 4 Sep 2007 07:27:54 GMT
Subject: The reverse of encode('...', 'backslashreplace')
References: <mailman.12.1188888319.2658.python-list@python.org>
Message-ID: <Xns99A1561EC6758duncanbooth@127.0.0.1>

"Tor Erik S?nvisen" <torerik81 at gmail.com> wrote:

> How can I transform b so that the assertion holds? I.e., how can I
> reverse the backslash-replaced encoding, while retaining the str-type?
> 
>>>> a = u'?'
>>>> b = a.encode('ascii', 'backslashreplace')
>>>> b
> '\\xe6'
>>>> assert isinstance(b, str) and b == '?'
> 
> Traceback (most recent call last):
>   File "<pyshell#59>", line 1, in <module>
>     assert isinstance(b, str) and b == '?'
> AssertionError
> 

The simple answer is that you cannot: the backslashreplace isn't a 
reversible operation. e.g. Try:

>>> a = u'\\xe6?'
>>> print a
\xe6?
>>> b = a.encode('ascii', 'backslashreplace')
>>> b
'\\xe6\\xe6'
>>> 

There is no way after the encoding that you can tell which of the \xe6 
sequences needs reversing and which doesn't. Perhaps the following is 
what you want:

>>> b = a.encode('unicode_escape')
>>> print b
\\xe6\xe6
>>> print b.decode('unicode_escape')
\xe6?
>>> 


From gagsl-py2 at yahoo.com.ar  Sat Sep 29 20:56:17 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 29 Sep 2007 21:56:17 -0300
Subject: Command-line does work when scheduled
References: <1191098074.342460.52130@n39g2000hsh.googlegroups.com>
	<mailman.1289.1191100817.2658.python-list@python.org>
	<1191104269.578536.56470@g4g2000hsf.googlegroups.com>
Message-ID: <op.tzfzj3jxx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 29 Sep 2007 19:17:49 -0300, Jim <jscrerar at compuserve.com> escribi?:

> On Sep 29, 3:19 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>> En Sat, 29 Sep 2007 17:34:34 -0300, Jim <jscre... at compuserve.com>  
>> escribi?:
>>
>> > I want to schedule a Python program that reads the command line for
>> > input.  However, when adding an argument to the command line Python
>> > will not pick it up when using Windows scheduled tasks.
>>
>> > How do I get it to work?
>>
>> Do you write the command line when defining the task? Using double  
>> quotes
>> around arguments with spaces?
>> It works fine for me.
>>
> I ran the following on the Scheduled Tasks:
>    "J:\Jim Crerar\MyPython\Zero_OE_Counter\Zero_OE_Counter.py"  n
>    "J:\Jim Crerar\MyPython\Zero_OE_Counter\Zero_OE_Counter.py  n"
>    "J:\Jim Crerar\MyPython\Zero_OE_Counter\Zero_OE_Counter.py"  "n"
> None of them work.
> However, no problem with running from *.bat file or directly from
> shortcut on my Desktop.

Try prepending the Python executable:

C:\Python25\Python.exe "J:\Jim  
Crerar\MyPython\Zero_OE_Counter\Zero_OE_Counter.py" n

If it works this way, maybe the .py file extension is not correctly  
registered.

-- 
Gabriel Genellina



From cjt22 at bath.ac.uk  Wed Sep  5 04:07:45 2007
From: cjt22 at bath.ac.uk (cjt22 at bath.ac.uk)
Date: Wed, 05 Sep 2007 01:07:45 -0700
Subject: Printing lists in columns
In-Reply-To: <46ddbb26$0$18672$426a74cc@news.free.fr>
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<mailman.315.1188810174.28954.python-list@python.org>
	<46dbd11e$0$6228$426a74cc@news.free.fr>
	<mailman.317.1188812089.28954.python-list@python.org>
	<1188816626.021956.281040@22g2000hsm.googlegroups.com>
	<5k2cjmF1r2aiU1@mid.uni-berlin.de>
	<1188836008.656284.76160@o80g2000hse.googlegroups.com>
	<46dc6f49$0$6207$426a34cc@news.free.fr>
	<1188900397.459760.259580@k79g2000hse.googlegroups.com>
	<slrnfdqe3t.i4p.hat@se-162.se.wtb.tue.nl>
	<Xns99A17FAC2587duncanbooth@127.0.0.1>
	<1188906767.737741.267350@19g2000hsx.googlegroups.com>
	<Xns99A18F8C528BCduncanbooth@127.0.0.1>
	<1188913394.763871.218660@d55g2000hsg.googlegroups.com>
	<46dd69b1$0$24998$426a74cc@news.free.fr>
	<1188917550.261894.84010@k79g2000hse.googlegroups.com>
	<46ddbb26$0$18672$426a74cc@news.free.fr>
Message-ID: <1188979665.052672.211110@r34g2000hsd.googlegroups.com>

Thanks guys, I really appreciate it. I have never used google groups
before
and am so impressed with how helpful you all are. It is also lovely
that
none of you mock my little knowledge of Python but just want to
improve it.

I have another question in relation to the izip_longest function (I
persume
this should be within the same topic).
Using this funciton, is there a way to manipulate it so that the
columns can be formated
tabular i.e. perhaps using something such as str(list).rjust(15)
because currently the columns
overlap depending on the strings lengths within each column/list of
lists. i.e. my output is
currently like:

bo, daf, da
pres, ppar, xppc
magnjklep, *, dsa
*, *, nbi

But I want it justified, i.e:

bo       ,  daf,  da
pres     , ppar,  xppc
magnjklep,    *,  dsa
*        ,    *,  nbi

I am struggling to understand how the izip_longest function works
and thus don't really know how it could be manipulated to do the
above.
It would be much apprecited if somoene could also explain how
izip_function
works as I don't like adding code into my programs which I struggle to
understand.
Or perhaps I have to pad out the lists when storing the Strings?

Any help would be much appreciated.



From jgardner.jonathangardner.net at gmail.com  Thu Sep 13 16:21:07 2007
From: jgardner.jonathangardner.net at gmail.com (Jonathan Gardner)
Date: Thu, 13 Sep 2007 20:21:07 -0000
Subject: plotting pixels in python
In-Reply-To: <1189708663.253748.323460@y42g2000hsy.googlegroups.com>
References: <1189706620.564963.29690@d55g2000hsg.googlegroups.com>
	<1189707751.846412.51420@r29g2000hsg.googlegroups.com>
	<1189708663.253748.323460@y42g2000hsy.googlegroups.com>
Message-ID: <1189714867.580851.13230@k79g2000hse.googlegroups.com>

On Sep 13, 11:37 am, jo5867... at gmail.com wrote:
> No currently I am using a canvas from the Tkinter module
> What I actually want is to show how a line is plotted pixel by pixel
> using a delay loop. I want functions something like putpixel not
> draw_line

Try drawing 1px wide rectangles.



From deets at nospam.web.de  Wed Sep 12 05:34:21 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 12 Sep 2007 11:34:21 +0200
Subject: Generating HTML
References: <mailman.427.1189571602.2658.python-list@python.org>
Message-ID: <5kpq4tF4ugonU1@mid.uni-berlin.de>

Sebastian Bassi wrote:

> Hello,
> 
> What are people using these days to generate HTML? I still use
> HTMLgen, but I want to know if there are new options. I don't
> want/need a web-framework a la Zope, just want to produce valid HTML
> from Python.

KID, Genshi, Mako. And a bazillion others. I prefer the first two ones
because the force you to use valid XML and produce HTML/XHMTL out of that.

Diez


From neilscad at hotmail.com  Sat Sep 29 02:10:22 2007
From: neilscad at hotmail.com (neil)
Date: Sat, 29 Sep 2007 18:10:22 +1200
Subject: python 2.5 and 3gb switch
References: <fdkan6$ne0$1@aioe.org> <fdkfqb$qr$1@daisy.noc.ucla.edu>
Message-ID: <fdkq8g$vj2$1@aioe.org>

why?
I am asking if any one knows of a 3gb python build.
The code runs successfully in lesser missions it just wont run in the extra 
memory available when I try to run it along with my other programs in a 3gb 
space.
thanks for your reply though 




From carsten at uniqsys.com  Fri Sep 28 16:15:03 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 28 Sep 2007 16:15:03 -0400
Subject: Python 3.0 migration plans?
In-Reply-To: <1191009608.985644.271160@50g2000hsm.googlegroups.com>
References: <1191002679.569709.16870@22g2000hsm.googlegroups.com>
	<mailman.1242.1191003389.2658.python-list@python.org>
	<1191005906.556751.261940@22g2000hsm.googlegroups.com>
	<5m51l4Fbao07U2@mid.uni-berlin.de>
	<1191007754.740566.137510@n39g2000hsh.googlegroups.com>
	<1191008702.579795.141180@r29g2000hsg.googlegroups.com>
	<1191009608.985644.271160@50g2000hsm.googlegroups.com>
Message-ID: <1191010503.3393.52.camel@dot.uniqsys.com>

On Fri, 2007-09-28 at 13:00 -0700, TheFlyingDutchman wrote:
> Being in a land where every nit can be picked, I am surprised that you
> offered up a mailing list when I was asking for a newsgroup.

nntp://news.gmane.org/gmane.comp.python.tutor

-- 
Carsten Haese
http://informixdb.sourceforge.net




From vito.detullio at gmail.com  Sun Sep 16 07:16:59 2007
From: vito.detullio at gmail.com (ZeD)
Date: Sun, 16 Sep 2007 11:16:59 GMT
Subject: generate list of partially accumulated values
References: <1189936564.932553.148800@50g2000hsm.googlegroups.com>
	<1189936979.276166.103080@w3g2000hsg.googlegroups.com>
	<1189937183.100462.175070@o80g2000hse.googlegroups.com>
	<1189938119.469599.171960@w3g2000hsg.googlegroups.com>
Message-ID: <Lg8Hi.112905$%k.258704@twister2.libero.it>

cesco wrote:

> The list is composed of objects:
> l = [obj1, obj2, obj3, obj4]
> and I need to call a method (say method1) on each object as follow:
> l1 = [obj1.method1(obj2), obj2.method1(obj3), obj3.method1(obj4),
> obj4]

to me it sounds a bit different from the original request, but...

> Is there a clean way of doing this?

l = [obj1, obj2, obj3, obj4]
l1 = [a.method1(b) for a,b in zip(l, l[1:)] + l[-1:]

-- 
Under construction


From stefan.behnel-n05pAM at web.de  Wed Sep 19 04:17:11 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Wed, 19 Sep 2007 10:17:11 +0200
Subject: lxml codespeak pages empty ?
In-Reply-To: <fcqll6$5ip$2@news2.u-psud.fr>
References: <fcqll6$5ip$2@news2.u-psud.fr>
Message-ID: <46F0DB07.5080902@web.de>

Laurent Pointal wrote:
> I can no longer get codespeak's lxml page at http://codespeak.net/lxml/
> (get an empty HTML document <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01
> Transitional//EN"><html><head><title></title></head><body></body></html>)...
> 
> 
> Am-I alone in this case ?
> Any codespeaker reading ?

Hmm, it's working for me...

Stefan


From s.mientki at id.umcn.nl  Wed Sep 12 03:51:02 2007
From: s.mientki at id.umcn.nl (stef)
Date: Wed, 12 Sep 2007 09:51:02 +0200
Subject: An ordered dictionary for the Python library?
In-Reply-To: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
Message-ID: <af72e$46e79a67$83aef404$9244@news2.tudelft.nl>

Mark Summerfield wrote:
> I feel that Python lacks one useful data structure: an ordered
> dictionary.
>
> I find such data structures v. useful in C++. I know that in Python
> the sort function is v. fast, but often I prefer never to sort but
> simply to use an ordered data structure in the first place.
> (I'm aware that for ordered lists I can use the bisect module, but I
> want an ordered key-value data structure.)
>
> I think other people must find such things useful. There are three
> implementations on the Python Cookbook site, and one on PyPI, all in
> pure Python (plus I have my own implementation, also pure Python).
>
> I would suppose that it would be better if it was implemented in C---
> for example, my own pure Python ordered dict loads data about eight
> times slower than the built-in dict. Nonetheless, I still find it
> worth using for the convenience it offers.
>
> Do other Python programmers feel this lack? Is this worth a PEP?
>
>   
Yes I think it's really useful,
(or at least I'm used to it in other languages ;-)
If you're going to extend the dictionary,
there's one other flag I'm continuously missing:
"case-insensitive" key.

cheers,
Stef Mientki

> [I originally asked about this on the P3K mailing list, but then
> realised that it isn't version-specific really.]
>
>   


From Shawn at Milochik.com  Wed Sep  5 12:20:08 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Wed, 5 Sep 2007 12:20:08 -0400
Subject: REGULAR EXPRESSION
In-Reply-To: <1188968632.077355.199740@y42g2000hsy.googlegroups.com>
References: <1188912767.360967.306050@y42g2000hsy.googlegroups.com>
	<fbjnc1$i8b$1@sea.gmane.org>
	<mailman.55.1188948935.2658.python-list@python.org>
	<1188968632.077355.199740@y42g2000hsy.googlegroups.com>
Message-ID: <2dc0c81b0709050920w59324fd6t8a77cf854d38777c@mail.gmail.com>

> Hi.. Thanks alot for finding time to help a beginner like me. What I
> am trying to do is validate the input i get. I just want to take
> numbers and numbers only. So if the input is 23+1 or 2/3 or 9-0 or
> 7/0 , I want to find it using reg exp. I know there are other ways to
> do this... but i thought i will try this as i need to learn reg exp. I
> tried \D+   ,   \W+,  and \D+|\W+ .. Thanks once again...
>
>
> --


Send a couple of strings and the output you would like from each.


From van.lindberg at gmail.com  Tue Sep 11 07:28:00 2007
From: van.lindberg at gmail.com (VanL)
Date: Tue, 11 Sep 2007 06:28:00 -0500
Subject: [PyCON-Organizers] Next PyCon Organizers' Meeting Tuesday,	11
	September
In-Reply-To: <200709110557.l8B5vQbm011421@theraft.openend.se>
References: <46E5CFAB.8090802@python.org>	<18149.64774.138831.976974@montanaro.dyndns.org>	<f08f4fbb0709101934r6c0d5a60i6ad2aaf266f63a98@mail.gmail.com>
	<200709110557.l8B5vQbm011421@theraft.openend.se>
Message-ID: <46E67BC0.7040104@gmail.com>

Laura Creighton wrote:
> Does this mean that if you do not have a google account, and do not
> want one, there is no way to join the meeting?  

No. Any jabber/xmpp account will do fine. Google is just the 
highest-profile provider of jabber accounts. There is a list of other 
account providers on jabber.org. Alternatively, there is jabber server 
software (including Free Software) that you can run on a server that you 
control. After setting that up, you can use your own account on your own 
server to join the meeting.

Thanks,

Van


From fakeaddress at nowhere.org  Sat Sep 15 01:32:31 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Fri, 14 Sep 2007 22:32:31 -0700
Subject: Coming from Perl
In-Reply-To: <KgdGi.2174$tx1.172@read1.cgocable.net>
References: <Cv%Fi.198$372.59@read2.cgocable.net>	<1189644803.816375.269950@y42g2000hsy.googlegroups.com>	<b46Gi.221$372.100@read2.cgocable.net>	<87y7fa52ru.fsf@benfinney.id.au>	<jWaGi.224$372.55@read2.cgocable.net>	<mailman.485.1189691416.2658.python-list@python.org>	<d9cGi.356$372.131@read2.cgocable.net>	<mailman.489.1189695918.2658.python-list@python.org>	<iPcGi.357$372.115@read2.cgocable.net>
	<mailman.490.1189698752.2658.python-list@python.org>
	<KgdGi.2174$tx1.172@read1.cgocable.net>
Message-ID: <A7KGi.8106$z_5.484@nlpi069.nbdc.sbc.com>

Amer Neely wrote:
> This seems to indicate that maybe my host needs to configure Apache to 
> run python scripts? But I didn't need to do anything with mine.

Another possibility: If it works on Windows but not Unix, check
the end-of-line characters. Windows ends each line with the two
character sequence carriage-return + newline, which in Python
is "\r\n". Unix uses newline alone, "\n".

Most Unixies will choke on a #! line with a carriage return.
The Python interpreter will accept source files with either
end-of-line on either system, but of course you'll not get
that far unless the operating system respects the shebang line.

Maybe you already checked that. Hmmm...other possiblities...

Do you have shell access? Can you executing it directly from
the shell? Do you get a Python error, or some other?

Did you:  chmod ugo+rx <yourscript>

Is Python in /usr/bin? What does "which python" say?

Generally, most experts seem to prefer:

     #!/usr/bin/env python

You might try changing the the extension of your script from .py
to .cgi. Windows uses the .py to choose the executable, but Unix
does not care; it used the shebang line.


-- 
--Bryan


From sjmachin at lexicon.net  Mon Sep 10 06:37:59 2007
From: sjmachin at lexicon.net (John Machin)
Date: Mon, 10 Sep 2007 03:37:59 -0700
Subject: Modul (%) in python not like in C?
In-Reply-To: <mailman.301.1189379794.2658.python-list@python.org>
References: <880dece00709091201n449d4c2k31998a5d426de17d@mail.gmail.com>
	<46E4466C.2030303@sdf.lonestar.org>
	<mailman.300.1189371539.2658.python-list@python.org>
	<slrnfe8rgp.66h.missive@dell.linuxdev.us.dell.com>
	<1189377800.482587.143060@22g2000hsm.googlegroups.com>
	<mailman.301.1189379794.2658.python-list@python.org>
Message-ID: <1189420679.118421.18420@r34g2000hsd.googlegroups.com>

On Sep 10, 9:16 am, Ricardo Ar?oz <ricar... at gmail.com> wrote:
> John Machin wrote:
> > On Sep 10, 8:05 am, Lee Harr <miss... at frontiernet.net> wrote:
> >>>> Python will always yield a number x = m%n such that 0 <= x < n, but
> >>>> Turbo C will always yield a number such that if x = m%n -x = -m%n.  That
> >>>> is, since 111 % 10 = 1, -111 % 10 = -1.  The two values will always
> >>>> differ by n (as used above).
> >> Maybe it is an order-of-operations thing....
>
> >> -111 % 10 = -1
> >> (-111) % 10 = 9
> >> ?
>
> > and on the other hand, maybe it's not. Try to think of any language
> > where unary minus binds so loosely.
>
> Why the theoretical argument when you can TEST your assumptions?
>
> >>> -111 % 10
> 9
> >>> (-111) % 10
>
> 9

I was *assuming* nothing; I *know* what is the relative precedence of
% and unary minus in both C and Python. I was not arguing; I was
inviting Lee (as I now invite you) to think before writing.



From mcl.office at googlemail.com  Fri Sep  7 04:21:40 2007
From: mcl.office at googlemail.com (mcl)
Date: Fri, 07 Sep 2007 01:21:40 -0700
Subject: MySQL: Global Connection
Message-ID: <1189153300.967875.204820@y42g2000hsy.googlegroups.com>

It is tough when the grey matter is getting past it.

I am starting to use MySQL and I would like to make my connection to
my database a variable in my Global Variable Class, but I just can not
see how to do it.

Class GlobalVars :



From mail at microcorp.co.za  Sat Sep  1 04:34:08 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 1 Sep 2007 10:34:08 +0200
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com><-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com><1188364909.397692.209170@q4g2000prc.googlegroups.com><1188367108.393207.241970@g4g2000hsf.googlegroups.com><1188369928.755777.142690@i38g2000prf.googlegroups.com><46d75191$0$401$426a74cc@news.free.fr><1188518054.298017.90610@x35g2000prf.googlegroups.com><46d76595$0$4013$426a74cc@news.free.fr><1188523589.736146.263510@l22g2000prc.googlegroups.com><1i3o9kr.2gmni61g62moaN%aleax@mac.com><7xwsvcc9yz.fsf@ruckus.brouhaha.com><1i3p8lm.19738kn1q0gkouN%aleax@mac.com><1188587846.687895.69240@q5g2000prf.googlegroups.com><38rmq4-cq.ln1@strongwill.g2ctech>
	<46d903db$0$19580$4c368faf@roadrunner.com>
Message-ID: <026201c7ec75$07d6e0c0$03000080@hendrik>

 "Carl Banks" <pavl....mail.com> wrote:

> This is starting to sound silly, people.  Critical is a relative term, 
> and one project's critical may be anothers mundane.  Sure a flaw in your 
> flagship product is a critical problem *for your company*, but are you 
> really trying to say that the criticalness of a bad web search is even 
> comparable to the most important systems on airplanes, nuclear reactors, 
> dams, and so on?  Come on.

This really intrigues me - how do you program a dam?  - and why is it
critical?

Most dams just hold water back.

Dam design software - well yes that I would agree is critical.
Is that what you mean?

- Hendrik




From arnodel at googlemail.com  Sat Sep  1 10:08:37 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sat, 01 Sep 2007 07:08:37 -0700
Subject: Is there a simple way to exit a while loop on keystroke?
In-Reply-To: <1188595723.878736.186900@w3g2000hsg.googlegroups.com>
References: <1188578827.809840.90100@r29g2000hsg.googlegroups.com>
	<1188581623.588967.78050@z24g2000prh.googlegroups.com>
	<1188583918.747640.300850@22g2000hsm.googlegroups.com>
	<1188593722.696576.12390@y42g2000hsy.googlegroups.com>
	<1188595723.878736.186900@w3g2000hsg.googlegroups.com>
Message-ID: <1188655717.047492.57860@50g2000hsm.googlegroups.com>

On Aug 31, 10:28 pm, kyoso... at gmail.com wrote:
> On Aug 31, 3:55 pm, Arnaud Delobelle <arno... at googlemail.com> wrote:
>
> > On Aug 31, 7:11 pm, gsxg <rha... at gmail.com> wrote:
>
> > > Thanks,
> > > The curses library doesn't look to helpful to me.
>
> > And yet it is.
>
> > --
> > Arnaud
>
> Maybe the OP is on Windows. The docs seem to indicate that the curses
> module isn't for Windows (see excerpt below):

Ah yes, Windows! I didn't think about it.  Yes, I reckon it's unlikely
that curses is implemented for MS Windows.

[...]
--
Arnaud




From gagsl-py2 at yahoo.com.ar  Tue Sep 25 00:23:30 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 25 Sep 2007 01:23:30 -0300
Subject: Regular Expressions: Can't quite figure this problem out
References: <496954360709241737o6e42e7efk29886b5631f6ca2e@mail.gmail.com>
	<a49e45f50709241827i107d0acav28431853ef403702@mail.gmail.com>
	<496954360709241853w6bb6e813ved0ec4fc80304d51@mail.gmail.com>
	<op.ty6tjyfqx6zn5v@gabriel2.softlabbsas.com.ar>
	<496954360709241917m3801e4aavee29cfef7deaf41b@mail.gmail.com>
	<fd9rs6$8b2$1@sea.gmane.org>
	<496954360709241951h6901d60etf2c4b3b5ec759f2a@mail.gmail.com>
Message-ID: <op.ty6ztgx0x6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 24 Sep 2007 23:51:57 -0300, Robert Dailey <rcdailey at gmail.com>  
escribi?:

> What I meant was that it's not an option because I'm trying to learn  
> regular
> expressions. RE is just as built in as anything else.

Ok, let's analyze what you want. You have for instance this text:
"<action></action>"
which should become
"<action/>"

You have to match:
(opening angle bracket)(any word)(closing angle bracket)(opening angle  
bracket)(slash)(same word as before)(closing angle bracket)

This translates rather directly into this regular expression:

r"<(\w+)></\1>"

where \w+ means "one or more alphanumeric characters or _", and being  
surrounded in () creates a group (group number one), which is  
back-referenced as \1 to express "same word as before"
The matched text should be replaced by (opening <)(the word  
found)(slash)(closing >), that is: r"<\1/>"
Using the sub function in module re:

py> import re
py> source = """
... <root></root>
... <root/>
... <root><frame type="image"><action></action></frame></root>
... <root><frame type="image"><action/></frame></root>
... """
py> print re.sub(r"<(\w+)></\1>", r"<\1/>", source)

<root/>
<root/>
<root><frame type="image"><action/></frame></root>
<root><frame type="image"><action/></frame></root>

Now, a more complex example, involving tags with attributes:
<frame type="image"></frame>  -->  <frame type="image" />

You have to match:
(opening angle bracket)(any word)(any sequence of words,spaces,other  
symbols,but NOT a closing angle bracket)(closing angle bracket)(opening  
angle bracket)(slash)(same word as before)(closing angle bracket)

r"<(\w+)([^>]*)></\1>"

[^>] means "anything but a >", the * means "may occur many times, maybe  
zero", and it's enclosed in () to create group 2.

py> source = """
... <root></root>
... <root><frame type="image"></frame></root>
... """
py> print re.sub(r"<(\w+)([^>]*)></\1>", r"<\1\2 />", source)

<root />
<root><frame type="image" /></root>

Next step would be to allow whitespace wherever it is legal to appear -  
left as an exercise to the reader. Hint: use \s*

-- 
Gabriel Genellina



From istvan.albert at gmail.com  Wed Sep 26 10:28:09 2007
From: istvan.albert at gmail.com (Istvan Albert)
Date: Wed, 26 Sep 2007 14:28:09 -0000
Subject: Tracking memory usage and object life time.
In-Reply-To: <1190808386.571152.103710@22g2000hsm.googlegroups.com>
References: <1190808386.571152.103710@22g2000hsm.googlegroups.com>
Message-ID: <1190816889.237615.252450@19g2000hsx.googlegroups.com>

On Sep 26, 8:06 am, Berteun Damman <bert... at gmail.com> wrote:

> that have been created after I don't need them anymore. I furthermore
> don't really see why there would be references to these larger objects
> left. (I can be mistaken of course).

This could be tricky because you have a graph that (probably) allows
you to walk its nodes, thus even having a single other reference to
any of the nodes could keep the entire graph "alive"

> The best I now can do is run the whole script several times (from a
> shell script) -- but this also forces Python to reparse the graph
> input again, and do some other stuff it only has to do once. A

you could pickle and save the graph once the initial processing is
done. That way subsequent runs will load substantially faster.

i.



From korovev76 at gmail.com  Thu Sep 20 08:39:07 2007
From: korovev76 at gmail.com (korovev76 at gmail.com)
Date: Thu, 20 Sep 2007 05:39:07 -0700
Subject: I MEANT ONIX.... [it was Re: ONYX]
In-Reply-To: <5lf7dsF7vn3qU1@mid.uni-berlin.de>
References: <1190211769.268351.79500@d55g2000hsg.googlegroups.com>
	<46f1726f$0$15276$426a74cc@news.free.fr>
	<1190282489.824709.29050@r29g2000hsg.googlegroups.com>
	<1190283378.175422.73290@r29g2000hsg.googlegroups.com>
	<5lf7dsF7vn3qU1@mid.uni-berlin.de>
Message-ID: <1190291947.945038.54040@57g2000hsv.googlegroups.com>

On 20 Set, 14:29, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
 >
> lxml is a validating parser for python.
>
> Diez

thank u, i'll take a look




From joel.schaerer at gmail.com  Wed Sep 26 06:21:55 2007
From: joel.schaerer at gmail.com (Joel)
Date: Wed, 26 Sep 2007 03:21:55 -0700
Subject: Cross-platform time out decorator
Message-ID: <1190802115.585306.250400@o80g2000hse.googlegroups.com>

I've been using this nice timing out decorator :
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/307871 . The
problem is that since it relies on sigalarm, it doesn't work under
windows. Would anyone know how to do a cross-platform version?

Thanks a lot!

joel



From rave247 at seznam.cz  Thu Sep  6 14:47:02 2007
From: rave247 at seznam.cz (=?us-ascii?Q?rave247=20rave247?=)
Date: Thu, 06 Sep 2007 20:47:02 +0200 (CEST)
Subject: =?us-ascii?Q?Re=3A=20Getting=20original=20working=20directory?=
In-Reply-To: <fbpgvn$sa6$1@sea.gmane.org>
Message-ID: <1658.1882-17889-1055570935-1189104422@seznam.cz>

If I could use os.getcwd() or save the value to some variable before calling os.chdir() I would do it, believe me. However I can't because it is the part of code where I can't do any changes. 

Also I do not agree that such thing is not possible because after python script finishes its work, it naturally gets back into the original location from where you started the script (in shell you are in the original location after script finishes). So this information has to be stored somewhere (probably in shell which runs the interpreter) and there *must*  be a way how to get it. Simply after calling os.chdir() the original value doen't disappear, I think it just needs some nice hack if python doesn't provide a way how to get it.



> ------------ P?vodn? zpr?va ------------
> Od: Ian Clark <iclark at mail.ewu.edu>
> P?edm?t: Re: Getting original working directory
> Datum: 06.9.2007 20:31:33
> ----------------------------------------
> rave247 rave247 wrote:
> > "......the *original* directory location *after* os.chdir() is
> performed......" os.getcwd() is not helping much as it returns the location that
> was set up in os.chdir() call
> > 
> > Thanks
> 
> Your question is akin to having a name X that is bound to some value, 
> setting it to 2 and then wanting to know what the original value is. It 
> just ain't gonna happen.
> 
> Simply follow the advice given by Gary and use os.getcwd() *before* the 
> call to os.chdir().
> 
> Ian
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 
> 
> 


From jeremy+complangpython at jeremysanders.net  Wed Sep 26 11:21:19 2007
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Wed, 26 Sep 2007 16:21:19 +0100
Subject: sorteddict PEP proposal [started off as orderedict]
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>
	<1190753722.026806.254530@d55g2000hsg.googlegroups.com>
	<1190756003.292096.71130@o80g2000hse.googlegroups.com>
	<1190789981.385466.37870@57g2000hsv.googlegroups.com>
	<Xns99B760A3F5859duncanbooth@127.0.0.1>
	<87sl51lshd.fsf@mulj.homelinux.net>
	<1190799759.367001.106400@r29g2000hsg.googlegroups.com>
	<87fy11lo22.fsf@mulj.homelinux.net>
	<1190804538.469582.96950@22g2000hsm.googlegroups.com>
	<slrnffkjoa.hc2.apardon@rcpc42.vub.ac.be>
	<1190814263.104358.158090@n39g2000hsh.googlegroups.com>
Message-ID: <fddtdg$jch$1@gemini.csx.cam.ac.uk>

Mark Summerfield wrote:

> The sorteddict API that has emerged so far is (1) apart from the
> constructor, everything is identical to dict, (2) the constructor
> takes the same args as sorted(), so if you want to seed with a dict or
> with keywords you write sorteddict(dict(a=1,b=2), ...), (or you could
> create a sorteddict and use update() since that takes the same args as
> dict's constructor).

first() and last() would also be nice on a sorted dict.

Jeremy

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


From george.sakkis at gmail.com  Sat Sep 29 18:53:07 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: Sat, 29 Sep 2007 22:53:07 -0000
Subject: Program inefficiency?
In-Reply-To: <1191090727.614819.292550@50g2000hsm.googlegroups.com>
References: <1191079347.192272.240540@22g2000hsm.googlegroups.com>
	<1191087234.915654.182370@k79g2000hse.googlegroups.com>
	<mailman.1284.1191088565.2658.python-list@python.org>
	<1191090293.017485.225470@y42g2000hsy.googlegroups.com>
	<1191090727.614819.292550@50g2000hsm.googlegroups.com>
Message-ID: <1191106387.602341.295460@d55g2000hsg.googlegroups.com>

On Sep 29, 2:32 pm, hall.j... at gmail.com wrote:

> It think he's saying it should look like this:
>
> (line noise snipped)

Or you can let BeautifulSoup do the dirty job for you and forget all
this ugliness:


from BeautifulSoup import BeautifulSoup

soup = BeautifulSoup(text)
for a in soup.findAll('a'):
    for attr in 'href','name':
        val = a.get(attr)
        if val:
            a[attr] = val.replace(' ','_')
print soup


George



From matt at tplus1.com  Wed Sep 26 22:01:17 2007
From: matt at tplus1.com (Matthew Wilson)
Date: Thu, 27 Sep 2007 02:01:17 GMT
Subject: Using closures and partial functions to eliminate redundant code
Message-ID: <N9EKi.37131$RX.19410@newssvr11.news.prodigy.net>

I wrote some code to create a user and update a user on a remote box by
sending emails to that remote box.  When I was done, I realized that my
create_user function and my update_user function were effectively
identical except for different docstrings and a single different value
inside:

    ### VERSION ONE

    def create_user(username, userpassword, useremail):
        "Send an email that will create a user in the remote system."

        # Build email
        email_body = """
    USERNAME = %s
    USERPASSWORD = %s
    USEREMAIL = %s
    """ % (username, userpassword, useremail)

        # send it.
        send_email(subject="CREATE", body=email_body)


    def update_user(username, userpassword, useremail):
        "Send an email that will update a user's password in the remote system."

        # Build email
        email_body = """
    USERNAME = %s
    USERPASSWORD = %s
    USEREMAIL = %s
    """ % (username, userpassword, useremail)

        # send it.
        send_email(subject="UPDATE", body=email_body)

    ### END

Then I came up with this approach to avoid all that redundant text:

    ### VERSION TWO

    def _f(mode):

        if mode not in ("create", "update"): 
            raise ValueError("mode must be create or update!")

        def _g(username, userpassword, useremail):

            # Build email
            email_body = """
        USERNAME = %s
        USERPASSWORD = %s
        USEREMAIL = %s
        """ % (username, userpassword, useremail)

            # send it.  
            send_email(subject=mode.upper(), body=email_body)
            
        # Seems goofy, but other ways are there?

        docstrings = {'create': "Send an email that will create a user in the remote system.",
                      'update': "Send an email that will update a user's password in the remote system."}

        _g.__doc__ = docstrings[mode]

        return _g

    # Then I created my functions like this:

    v2_create_user = _f("create")
    v2_update_user = _f("update")

    ### END


Finally, I came up with this approach:

    ### VERSION THREE

    from functools import partial

    def _h(mode, username, userpassword, useremail):

        if mode not in ("create", "update"): 
            raise ValueError("mode must be create or update!")

        # Build email
        email_body = """
    USERNAME = %s
    USERPASSWORD = %s
    USEREMAIL = %s
    """ % (username, userpassword, useremail)

        # send it.  
        send_email(subject=mode.upper(), body=email_body)
            
    # I can't figure out how to set up the docstring on these.

    v3_create_user = partial(_h, mode="create")
    v3_update_user = partial(_h, mode="update")

    ### END

I'm interested to hear how other people deal with really similar code.
The similarity just bugs me.  However, I wonder if using stuff like
closures or partial function application is needlessly showy.

Also, I hope anyone here can help me figure out how to attach a
meaningful docstring for my version three code.

Thanks in advance!


Matt


From wizzardx at gmail.com  Thu Sep 20 17:34:52 2007
From: wizzardx at gmail.com (David)
Date: Thu, 20 Sep 2007 23:34:52 +0200
Subject: validating parser
In-Reply-To: <fcuhc8$at5$1@fred.mathworks.com>
References: <fcuhc8$at5$1@fred.mathworks.com>
Message-ID: <18c1e6480709201434q44ee08fkfd6ae04f8a1eca13@mail.gmail.com>

On 9/20/07, Robert Schweikert <robert.schweikert at mathworks.com> wrote:
> Is there a Python module which will do XSD validation?

http://mail.python.org/pipermail/xml-sig/2006-June/011527.html


From tim at timgolden.me.uk  Thu Sep  6 15:39:26 2007
From: tim at timgolden.me.uk (Tim Golden)
Date: Thu, 06 Sep 2007 20:39:26 +0100
Subject: Finding specific date ranges
In-Reply-To: <1189101946.318748.99670@y42g2000hsy.googlegroups.com>
References: <1189090603.285778.282060@g4g2000hsf.googlegroups.com>	<mailman.161.1189094229.2658.python-list@python.org>	<1189099759.833051.253020@y42g2000hsy.googlegroups.com>	<mailman.163.1189100515.2658.python-list@python.org>
	<1189101946.318748.99670@y42g2000hsy.googlegroups.com>
Message-ID: <46E0576E.7010105@timgolden.me.uk>

kyosohma at gmail.com wrote:
> On Sep 6, 12:41 pm, Tim Golden <t... at timgolden.me.uk> wrote:
>>> Thanks! I'll try it both ways and see if there's any appreciable
>>> difference in speed, although since it will be packaged into an
>>> executable, that may not be an issue anyway.
>>> Mike
>> I honestly doubt there's any advantage to my approach, certainly
>> not in terms of speed. It's really only if it happens to suit
>> your mind better, or take advantage of structures you might
>> already have in place, etc.
>>
>> TJG
> 
> For completeness, here's my method for comparison's sake:
> 
[... snipped ...]

> Isn't it kind of late in the day over there, Tim? 

(It's about 8.30pm as I write this, so still awake :)

> Anyway, your method is probably clearer to read whereas mine 
 > doesn't require anything to be imported.

I think I've been a SQL & Python programmer for so long that
I tend to do anything -- and sometimes too much -- to avoid
messy loop/exit-when structures. On reflection, my code
would be simplified by ignoring all the datetime.date stuff
which is irrelevant for the purpose, since tuples will
compare perfectly well. Also, I had to put the conditional
in the loop because I didn't have data for every month. If
you *knew* you had at least one period for each month and
weren't fussed about, say, date arithmetic later on, it
would be even simpler, just a min () function around
a generator expression.

Frankly, though, with code as small scale as this, it's
far more important what *you* the programmer and any
future maintainers will find easy to understand and use,
and far less important how clever the code is or how
fast it runs.

 > I didn't even realize there was a calendar module...or
> maybe I forgot about it.

Even now, after some seven years of using Python, I'm
*still* surprised when I read someone's blog article or
mailing list posting referring to a module or application
I never knew about, or had completely forgotten.

TJG


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Sep 24 07:16:24 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 24 Sep 2007 13:16:24 +0200
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <Bgv*HjvVr@news.chiark.greenend.org.uk>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<Bgv*HjvVr@news.chiark.greenend.org.uk>
Message-ID: <46f79c75$0$30457$426a34cc@news.free.fr>

Matthew Woodcraft a ?crit :
> Cristian  <super.sgt.pepper at gmail.com> wrote:
>> To me, the biggest setback for new programmers is the different
>> syntax Python has for creating functions. Instead of the common (and
>> easy to grasp) syntax of foo = bar Python has the def foo(): syntax.
> 
> [...]
> 
>> in a program like Python there doesn't seem to be any other reason to
>> have it.
> 
> One reason for the different syntax is that functions, unlike most
> other objects, know their own names (which can be shown in tracebacks
> and the like).

Nope. They know *one* of their names - the one they've been given when 
first instanciated. Which may or not be the name used to get at them...


From dickinsm at gmail.com  Sun Sep 30 19:05:06 2007
From: dickinsm at gmail.com (Mark Dickinson)
Date: Sun, 30 Sep 2007 23:05:06 -0000
Subject: Matrix convergence
In-Reply-To: <1191179438.736054.322700@o80g2000hse.googlegroups.com>
References: <1191179438.736054.322700@o80g2000hse.googlegroups.com>
Message-ID: <1191193506.647796.255680@y42g2000hsy.googlegroups.com>

On Sep 30, 3:10 pm, Zhengzheng Pan <panzhengzh... at gmail.com> wrote:
> I'm trying to check whether a (stochastic/transition) matrix
> converges, i.e. a function/method that will return True if the input
> matrix sequence shows convergence and False otherwise. The background
> is a Markov progress, so the special thing about the transition matrix
> is the values of elements in each row add up to be 1. Fail to find any
> relevant build-in methods in Python...

I'm not sure exactly what you want here.  Do you have a single
transition matrix, or a `matrix sequence'?  Can I assume that you're
working with a time-homogeneous Markov chain with a finite state
space?  And that the function should take the transition matrix, and
should return True if and only if there's a unique limiting
distribution for the Markov process, independent of starting state?
Or have I misunderstood?

What's the typical number of states?  Thousands?  Millions?

Can you explain why you're unable to implement detection of
periodicity and connectivity (is this the same as irreducibility)?
Are there technical problems, or just conceptual problems?

Detecting irreducibility ought to be straightforward: form the
directed graph corresponding to the transition matrix (one vertex per
state, an edge from i to j iff the corresponding entry in the
transition matrix is nonzero) and apply Tarjan's algorithm (google
it!), which detects strongly connected components:  if there's a
single strongly connected component consisting of the entire graph
then the Markov process is irreducible.  Figuring out the period
shouldn't be too hard either---I have a feeling that it ought to be
possible to adapt Tarjan's algorithm to detect the period: label the
vertices of the graph by depth (Tarjan's algorithm is essentially a
depth-first traversal of the graph), and every time Tarjan's algorithm
detects a cycle, comparing depths will give you a multiple of the
period;  taking the gcd of all these multiples should give the period
itself.

An alternative, quick and dirty way (quick for the human, not the
computer!) would be just to compute some large power of the transition
matrix and eyeball it to see if all columns are identical.  If so, the
process converges.

> Thx!

Ur wlcm!

Mark



From nospam at nowhere.com  Sun Sep 30 01:43:44 2007
From: nospam at nowhere.com (DavidM)
Date: 30 Sep 2007 17:43:44 +1200
Subject: New to python
References: <1191126010.260942.89230@y42g2000hsy.googlegroups.com>
Message-ID: <46ff2980@news.orcon.net.nz>

On Sat, 29 Sep 2007 21:20:10 -0700, Googy wrote:

> I am new to python...
> 
> The programming language i know well is C
> Can any one recommend me the good ebook for beginners. I have loads of
> ebooks but i am not able to decide which to start with which book.
> Also i am learning XML so later on i can switch to books on Python and
> XML but initially which book to read??
> 
> Please help...

Some years ago I crossed over from C to Python myself. I found Python
weird and incomprehensible at first, especially since I was effectively
having to learn OO at the same time.

I worked through the standard Python tutorial that comes with the Python
manual, and kept an interactive Python interpreter session running in a
terminal.

It was tough for a while, but before long, something just seemed to
'click' and I 'got it'.

There were still many things to learn - I'm still learning - but what has
helped heaps has been the #python IRC channel on irc.freenode.net.

Keep at it - it'll gel for you if you persist, and you're willing to do
lots of experimenting.


From gagsl-py2 at yahoo.com.ar  Fri Sep  7 20:57:34 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 07 Sep 2007 21:57:34 -0300
Subject: application version checking against database
References: <1189165916.268515.10360@d55g2000hsg.googlegroups.com>
	<588D53831C701746A2DF46E365C018CE01D2CB32@LITEXETSP001.etrsouth.corp.entergy.com>
Message-ID: <op.tya8x8hox6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 07 Sep 2007 10:12:09 -0300, Hamilton, William   
<whamil1 at entergy.com> escribi?:

>> We are trying to implement a system that checks the version of the
>> application against a version number stored in the database.  We don't
>> want the app and the db don't become out of sync.
>>
>> We have tried setting a __version__ variable in the top most module,
>> however, it seems that this is not accessible for the modules that are
>> subsequently imported.  There are a several locations in the app where
>> we want to do the version check, but we would like to have one place
>> to set the version number, namely the top level module.
>
> You could add a Version module that contains the version number and any
> functions related to the version checking, and import that into the
> modules that do version checking.

Also, there is a version module already available from the standard  
library:

 from distutils.version import StrictVersion
__version__ = StrictVersion("1.3")
__version__ = '$Revision: 1.19 $'[11:-2]

The last line is for CVS.

-- 
Gabriel Genellina



From deets at nospam.web.de  Thu Sep 13 03:39:14 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 13 Sep 2007 09:39:14 +0200
Subject: Implementing a fixed size stack for an RPN Calculator
In-Reply-To: <1189660374.063395.71360@50g2000hsm.googlegroups.com>
References: <1189630522.152326.3040@d55g2000hsg.googlegroups.com>
	<5kr5hoF4s6gmU3@mid.uni-berlin.de>
	<1189660374.063395.71360@50g2000hsm.googlegroups.com>
Message-ID: <5ks7pmF58ijvU1@mid.uni-berlin.de>

rami.mawas at gmail.com schrieb:
> On Sep 12, 2:55 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>> On Wed, 12 Sep 2007 20:55:22 +0000, rami.ma... at gmail.com wrote:
>>> I have implemented an RPN calculator in python but now I would like to
>>> make the stack size fixed. how can I transform the user's RPN
>>> expression from a stack overflow to a computable expression.
>>> For instance, if my stack size is 2 then the some expression can't be
>>> computed but could be transformed as following:
>>> Non computable expression: 1 2 3 + +   --> stack size of 3 is needed
>>> Computable expression: 1 2 + 3 +         --> stack size of 2 is needed
>>> How can I define a formal way of transforming the non computable
>>> expression to computable one.
>>> My RPN only implements: + - x %
>> Why does this homework assignment limit the stack so severely!?  ;-)
>>
>> Ciao,
>>         Marc 'BlackJack' Rintsch
> 
> 
> The problem is not with the stack being severely small or not, it
> could be 1000 but it should be fixed and that's the limitation.

It can't be fixed. You can algebraic rewrite expressions of the form

(a + (b + (c + d))

because of the commutativity of the +-operation to

(a+b) + (c + d)

and this can be done automatically.

But for arbitrary expressions, you will _always_ need arbitrary stack-sizes.

Diez


From steve at REMOVE-THIS-cybersource.com.au  Thu Sep  6 02:25:54 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Thu, 06 Sep 2007 06:25:54 -0000
Subject: Any syntactic cleanup likely for Py3? And what about doc
	standards?
References: <46DEFD2E.5050205@sbcglobal.net>
	<mailman.112.1189022368.2658.python-list@python.org>
	<87tzq898e2.fsf@wilson.homeunix.com>
	<mailman.118.1189034379.2658.python-list@python.org>
	<87ejhc8z23.fsf@wilson.homeunix.com> <zwKDi.10347$kI5.1097@trnddc08>
Message-ID: <13dv7biiu70252d@corp.supernews.com>

On Thu, 06 Sep 2007 03:31:43 +0000, Alan Isaac wrote:

>> Their only flaw is that they are not
>> "virtual" (in C++ speak).  In other words, you can't pass a "self"
>> parameter to them.
> 
> http://www.kylev.com/2004/10/13/fun-with-python-properties/


I'm not 100% sure I get what problem that piece of code is supposed to 
solve, but if I have understood it, the obvious solution is to use 
inheritance, not nasty tricks with lambdas.

class Base(object):
    _foo = None
    def getFoo(self):
        return self._foo
    def setFoo(self, val):
        self._foo = val
    foo = property(getFoo, setFoo)

class Derived(Base): # like Base, but the default for foo is 0 not None
    _foo = 0


(Naturally the above is a toy example -- for something as simple as that, 
there is no benefit in using properties.)

The blogger who wrote it says "I was pretty impressed with myself for 
figuring this out. So I?m putting it on my site to pat myself on the 
back." Hmmm. Unless I've missed something, the solution on the web-page 
falls squarely in the too-clever-by-half bucket and nothing to be self-
congratulatory about.



-- 
Steven.


From kw at codebykevin.com  Thu Sep 20 13:54:59 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Thu, 20 Sep 2007 13:54:59 -0400
Subject: Internationalize a Tkinter application
Message-ID: <67a81$46f2b3f7$4275d90a$11857@FUSE.NET>

I'm investigating the possibility of internationalizing a Tkinter 
application that I develop. Tcl/Tk provides facilities for 
internationalizing applications via its msgcat package, documented in 
"how-to" fashion below:

http://www.tcl.tk/doc/howto/i18n.html

As far as I can tell, Tkinter does not wrap the msgcat library. Instead 
I've found the gettext module in the Python standard library. Is this 
the preferred package for implementing localized strings in a Tkinter 
application, or am I missing something?

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


From ilikecandy7 at gmail.com  Tue Sep  4 10:43:52 2007
From: ilikecandy7 at gmail.com (frenchy64)
Date: Tue, 04 Sep 2007 14:43:52 -0000
Subject: Parse or Pass?
Message-ID: <1188917032.271543.236420@d55g2000hsg.googlegroups.com>

I'm very confused...I want to describe passing variables to functions
and I've seen these two words used in very similar contexts.

Is there a difference between them?



From rcdailey at gmail.com  Mon Sep 24 21:53:57 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Mon, 24 Sep 2007 20:53:57 -0500
Subject: Regular Expressions: Can't quite figure this problem out
In-Reply-To: <a49e45f50709241827i107d0acav28431853ef403702@mail.gmail.com>
References: <496954360709241737o6e42e7efk29886b5631f6ca2e@mail.gmail.com>
	<a49e45f50709241827i107d0acav28431853ef403702@mail.gmail.com>
Message-ID: <496954360709241853w6bb6e813ved0ec4fc80304d51@mail.gmail.com>

Thanks.

Any easier way to do a 'replace' then using start(), end(), and slicing
operations? I'm currently doing it manually.

On 9/24/07, Miles <semanticist at gmail.com> wrote:
>
> On 9/24/07, Robert Dailey <rcdailey at gmail.com> wrote:
> > Hi,
> >
> > I'm attempting to create a regular expression that removes redundancy in
> > empty XML elements. For example:
> >
> > <root></root>
> >
> > The regular expression would convert the XML above into:
> >
> >  <root/>
>
> If you can guarantee that the XML is well-formed, then this should work:
>
> pattern = r'<([^/>][^>]*(?<!/))></[^>]+>'
> replace = r'<\1/>'
>
> -Miles
>
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From http  Tue Sep 25 13:52:57 2007
From: http (Paul Rubin)
Date: 25 Sep 2007 10:52:57 -0700
Subject: Clustering text-documents in bundles
References: <1190733093.110073.101460@k79g2000hse.googlegroups.com>
Message-ID: <7xir5y7hty.fsf@ruckus.brouhaha.com>

"exhuma.twn" <exhuma at gmail.com> writes:
> Is it possible to calculate a distance between two chunks of text? I
> suppose one could simply do a simple word-count on the chunks
> (removing common noise words of course). And then go from there. Maybe
> even assigning different weighting to words. But maybe there is a well-
> tested and useful algorithm already available?

There's a huge field of text mining that attempts to do things like
this.  http://en.wikipedia.org/wiki/Latent_semantic_analysis for some
info about one approach.  Manning & Schutz's book "Foundations of Statistical
Natural Language Processing" (http://nlp.stanford.edu/fsnlp/) is 
a standard reference about text processing.  They also have a
new one about information retrieval (downloadable as a pdf) that
looks very good: <http://informationretrieval.org>.


From hniksic at xemacs.org  Thu Sep 27 17:38:49 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Thu, 27 Sep 2007 23:38:49 +0200
Subject: Cross-platform time out decorator
References: <1190802115.585306.250400@o80g2000hse.googlegroups.com>
	<1190899882.702911.44670@w3g2000hsg.googlegroups.com>
	<87k5qc18gf.fsf@mulj.homelinux.net>
	<1190907553.425261.273400@w3g2000hsg.googlegroups.com>
	<87ejgjnarq.fsf@mulj.homelinux.net>
	<mailman.1188.1190926028.2658.python-list@python.org>
Message-ID: <87abr7n5zq.fsf@mulj.homelinux.net>

"Chris Mellon" <arkanes at gmail.com> writes:

> You can use ctypes and the Python API to raise a Python exception in
> the thread.

How, by changing the thread's exception state?


From furkankuru at gmail.com  Mon Sep 17 13:39:34 2007
From: furkankuru at gmail.com (Furkan Kuru)
Date: Mon, 17 Sep 2007 20:39:34 +0300
Subject: Using python to create windows apps that everyone can use?
In-Reply-To: <000001c7f94c$8a280de0$0202fea9@upstairs>
References: <000001c7f94c$8a280de0$0202fea9@upstairs>
Message-ID: <3a4a8f930709171039u574fc0b9m65d68d825f9cbb87@mail.gmail.com>

have a look at wxpython and py2exe.

On 9/17/07, Tom Harding <tomharding at inbox.com> wrote:
>
>  Hi guys, sorry to post another topic on this, as I am aware that it has
> already been posted a few times, but not with specifically what I am looking
> for. I want an app that makes a gui interface for python (similar to
> Microsoft visual studio or qt designer, not a code based one) and/or an app
> that can make this into a .exe that can be opened by any person on any
> computer without python installed.
>
>
>
> I would just love to do this in python and not C++, its so simple and
> logical.
>
>
>
> So basically, the easiest way to do that, please!
>
>
>
> Thanks,
>
>
>
> Tom Harding
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Furkan Kuru
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From croozeus at gmail.com  Tue Sep 25 10:47:42 2007
From: croozeus at gmail.com (croozeus at gmail.com)
Date: Tue, 25 Sep 2007 14:47:42 -0000
Subject: PyS60
Message-ID: <1190731662.584011.105500@o80g2000hse.googlegroups.com>

Does anybody in the group develop applications for symbian OS using
Python for Series 60?
I am interested in developing such applications..
Also i have the following site for the newbies to PyS60.

Regards,
Pankaj Nathani

Pys60 1.4.0 on Nokia 6680 4.04 2nd Edition FP2,Pys60 1.4.0 on Nokia
7610 2nd Edition

View my P60 at
http://croozeus.googlepages.com/py60

Py60 Resources
http://sourceforge.net/projects/pys60
_____________________________



From steve at holdenweb.com  Thu Sep  6 07:36:41 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 06 Sep 2007 04:36:41 -0700
Subject: How to do python and RESTful
In-Reply-To: <1189022079.403495.175800@g4g2000hsf.googlegroups.com>
References: <1189022079.403495.175800@g4g2000hsf.googlegroups.com>
Message-ID: <fbooog$uf9$1@sea.gmane.org>

MarkyMarc wrote:
> Hi all,
> 
> I want to make a web service application in python and keywords are
> RESTful, python and nice urls(urls mapped to python objects).
> 
> I don't want a big framework but a nice small one, that can just do
> the things I want.
> 
Translation: I am only interested in a solution that has anticipated my 
needs almost exactly. [?]

> I have be looking at quixote, but is this uptodate? "plain"
> mod_python, can this make url to http put,get,delete and post?
> 
Would you care to explain why quixote needs to be "uptodate"? Surely it 
either does what you want or it doesn't? If it dies, then it hardly 
matters how "up to date" it is. Are you also concerned that some parts 
of Python remains unchanged since before 1.5.2, now almost tne years old?

> Can some one here point me some where I can read about python and
> RESTful or have some experiences with other?
> 
> Any help is apricieted.
> 
I hope you don't regard this as being unhelpful. I would encourage you 
to focus on finding a system that meets your (functionality) 
requirements. If you want "up to date" then C# is that way ---> ;-)

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From hniksic at xemacs.org  Wed Sep 26 08:42:30 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Wed, 26 Sep 2007 14:42:30 +0200
Subject: sorteddict PEP proposal [started off as orderedict]
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>
	<1190753722.026806.254530@d55g2000hsg.googlegroups.com>
	<1190756003.292096.71130@o80g2000hse.googlegroups.com>
	<1190789981.385466.37870@57g2000hsv.googlegroups.com>
	<Xns99B760A3F5859duncanbooth@127.0.0.1>
	<87sl51lshd.fsf@mulj.homelinux.net>
	<1190805819.406334.24730@k79g2000hse.googlegroups.com>
Message-ID: <87bqbplhs9.fsf@mulj.homelinux.net>

Paul Hankin <paul.hankin at gmail.com> writes:

>> An implementation of sorted dict using a balanced tree as the
>> underlying data structure would give decent performance in all the
>> mentioned use cases.  For example, red-black trees search, insert,
>> and delete in O(log n) time.
>
> But dicts do search, insert and delete in O(1) time, so using some
> variety of balanced tree will give you much worse performance when
> you're doing regular dict operations.

I wouldn't call it "much worse"; while O(log(n)) is worse than O(1),
it's still very fast, which is why popular programming language
libraries have an ordered mapping type based on balanced trees.  Also
note that dict performance can degrade with hash collisions, while
trees can maintain complexity guarantees on all operations.

In the end, it's a tradeoff.  Hash tables offer O(1) access, but lack
ordering.  Balanced trees offer ordering at the price of O(log n)
access.  Both have their uses, but neither is syntactic sugar for the
other.


From paddy3118 at googlemail.com  Wed Sep 19 04:37:21 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Wed, 19 Sep 2007 08:37:21 -0000
Subject: Using pseudonyms
In-Reply-To: <1i4nmjz.z9983sibdq42N%aleax@mac.com>
References: <5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<87sl5j5r34.fsf@benfinney.id.au>
	<1189646281.569796.267940@d55g2000hsg.googlegroups.com>
	<87ir6f5mrq.fsf@benfinney.id.au>
	<1189651204.408268.57580@19g2000hsx.googlegroups.com>
	<1i4dddf.piaojwz9lz40N%aleax@mac.com>
	<1189700775.661780.292150@50g2000hsm.googlegroups.com>
	<46e97917$0$9014$426a74cc@news.free.fr>
	<mailman.563.1189823461.2658.python-list@python.org>
	<1190013177.473529.167770@o80g2000hse.googlegroups.com>
	<46ee2d9d$0$26213$426a74cc@news.free.fr>
	<fcn81q$g80$1@panix3.panix.com>
	<46ef893c$0$21882$426a34cc@news.free.fr>
	<fcop08$2ue$1@panix3.panix.com>
	<mailman.726.1190130940.2658.python-list@python.org>
	<fcot65$1us$1@panix3.panix.com>
	<1i4nmjz.z9983sibdq42N%aleax@mac.com>
Message-ID: <1190191041.582109.113930@19g2000hsx.googlegroups.com>

On Sep 19, 5:07 am, al... at mac.com (Alex Martelli) wrote:
> Aahz <a... at pythoncraft.com> wrote:
> > For that matter, there are plenty of people who are better known by some
> > nickname that is not their legal name.
>
> Yep.  For example, some people whose legal name is "Alessandro" (which
> no American is ever going to be able to spell right -- ONE L, TWO S's,
> NOT an X or a J instead, "DRO" ending rather than "DER", etc), might
> choose to avoid the hassle and go by "Alex" (just to make up a case...).
>
> Alex


... and someone whose nickname is Paddy which is very common, and who
finds it hard to remember birthdates decides to add the days in the
month that his first two children were born on to his used name and
now only gets worried near his partners birthday :-)

- Paddy.



From cjt22 at bath.ac.uk  Wed Sep  5 04:38:41 2007
From: cjt22 at bath.ac.uk (cjt22 at bath.ac.uk)
Date: Wed, 05 Sep 2007 01:38:41 -0700
Subject: Accessing Module variables from another Module
Message-ID: <1188981521.735630.133060@r29g2000hsg.googlegroups.com>

Hi

I am new to Python (I have come from a large background of Java) and
wondered if someone could explain to me how I can access variables
stored in my main module to other functions within other modules
called
from this module

for example
file: main.py

from Storage import store
from Initialise import init
from ProcessSteps import process

storeList = store()   #Creates a object to store Step objects
init()
process()

file: Initialise.py
def init()
    ......
    storeList.addStep([a,b,c])


file: ProcessSteps.py
def process()
    for step in storeList.stepList:
    etc

I am currently just passing the variable in as a parameter
but I thought with Python there would be a way to gain direct access
to
storeList within the modules called from the top main module?

Cheers
Chris



From bdesth.quelquechose at free.quelquepart.fr  Sun Sep 16 15:21:05 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 16 Sep 2007 21:21:05 +0200
Subject: Python 3K or Python 2.9?
In-Reply-To: <mailman.581.1189872562.2658.python-list@python.org>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>	<46e7974d$0$31726$426a74cc@news.free.fr>	<fc8fc9$4qa$1@news2.carnet.hr>
	<5kq1hgF4r90oU1@mid.individual.net>	<1189618530.872819.136450@57g2000hsv.googlegroups.com>	<uir6ctto7.fsf@yahoo.com>
	<mailman.581.1189872562.2658.python-list@python.org>
Message-ID: <46ed8251$0$31567$426a74cc@news.free.fr>

Erik Jones a ?crit :
> On Sep 14, 2007, at 11:54 PM, David Trudgett wrote:
> 
>> TheFlyingDutchman <zzbbaadd at aol.com> writes:
>>
(snip)
 >>
>> Several languages use the "object.method(args)" form, which is  syntactic
>> sugar for "method(object, other_args)" which Ada, for instance, uses.
>> Knowing this clears up half the confusion (the object /is/ passed as a
>> parameter whichever syntax is used).
>>
>> The other half of the confusion is cleared up by considering that
>> Python methods are ordinary functions that don't magically "know" in
>> which "class" context they are executing: they must be told via the
>> first parameter.
> 
> 
> Yes, that is really the crux of the issue, though.  While the former  
> may be syntactic sugar for the latter, once any syntactic sugar has  
> become prevalent enough, it becomes the expected norm 

Being "the expected norm" is not enough to qualify has "being the right 
thing to do".

> and the latter  
> becomes clutter or, at best, awkward.

Until you want to dynamically add some generic function taking an object 
as first arg as a method of a class or instance. Exposing most of the 
inner working of it's object model is one of the greatest strength of 
Python. And that's one of the reasons I (and probably other people here) 
  like this language.

>  It's something that really  just 
> takes a little use until you get to the point where you don't  usually 
> think of it but, every so often, the thought creeps in.  I'm  not 
> complaining, just pointing out if you step out of this particular  box, 
> you'll realize that it really is a pointless one.  Saying,  "because 
> that's how Python does it" may be the only valid reason, but  that 
> argument is about on par with a six year old's "just because...".

If you really think the only rationale for this is "just because", then 
you're missing something IMHO.


From ldo at geek-central.gen.new_zealand  Mon Sep 10 04:19:08 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 10 Sep 2007 20:19:08 +1200
Subject: Python syntax wart
References: <fbvvil$7dj$1@lust.ihug.co.nz> <5khh6nF3i5nuU1@mid.uni-berlin.de>
	<46E390B7.2080808@web.de> <fc0518$aa2$5@lust.ihug.co.nz>
	<5ki2sdF3nr68U1@mid.individual.net> <fc2c52$i1l$3@lust.ihug.co.nz>
	<5kk8p0F3vfqqU1@mid.uni-berlin.de> <fc2t89$rik$4@lust.ihug.co.nz>
	<5kkcmvF3vfqqU3@mid.uni-berlin.de>
Message-ID: <fc2uls$shh$2@lust.ihug.co.nz>

In message <5kkcmvF3vfqqU3 at mid.uni-berlin.de>, Marc 'BlackJack' Rintsch
wrote:

> I see a tree structure here ...

Good, you're improving.

> ... but still no table. 

Who said anything about a table?

> And this is also easily written that way in Python if you don't insist on
> the line break after the ``if`` or can live with backslashes.

Which is precisely the point.


From pitonero at gmail.com  Fri Sep  7 03:33:02 2007
From: pitonero at gmail.com (El Pitonero)
Date: Fri, 07 Sep 2007 00:33:02 -0700
Subject: So what exactly is a complex number?
In-Reply-To: <1189002459.001229.116700@d55g2000hsg.googlegroups.com>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
	<mailman.212.1188576194.28954.python-list@python.org>
	<451mq4-les.ln1@ozzie.tundraware.com>
	<mailman.266.1188644067.28954.python-list@python.org>
	<1189002459.001229.116700@d55g2000hsg.googlegroups.com>
Message-ID: <1189150382.664389.166620@50g2000hsm.googlegroups.com>

On Sep 5, 7:27 am, El Pitonero <piton... at gmail.com> wrote:
>
> I am a bit surprised that today, September 2007, in a thread about
> complex numbers, no one has mentioned about geometric algebra.

Here is a good reference for whoever is interested. It's quite
accessible to general audience.

http://www.xtec.es/~rgonzal1/treatise.pdf

If a person spends some time to look at the geometric algebra, it will
become clear that complex numbers are not that special, after all.
Hopefully the relationship between the 2-d vector plane and the
complex plane will also become more clear, as complex numbers can be
understood as rotation-dilation operators over vectors. One also
learns that complex numbers are based on a metric assumption of square
of vectors (norm) being positive (a.k.a Euclidean space). There is
nothing sacred about positively-defined metric, and in fact if one
uses mixed signature metric (pseudo-Euclidean space), one comes up
with hyperbolic numbers instead of complex numbers.



From claird at lairds.us  Thu Sep 13 10:17:46 2007
From: claird at lairds.us (Cameron Laird)
Date: Thu, 13 Sep 2007 14:17:46 +0000
Subject: My first Python CGI (was: Coming from Perl)
References: <Cv%Fi.198$372.59@read2.cgocable.net>
	<1189644803.816375.269950@y42g2000hsy.googlegroups.com>
	<b46Gi.221$372.100@read2.cgocable.net>
	<2b6Gi.222$372.110@read2.cgocable.net>
Message-ID: <adtnr4-514.ln1@lairds.us>

In article <2b6Gi.222$372.110 at read2.cgocable.net>,
Amer Neely  <perl4hire at softouch.on.ca> wrote:
>Amer Neely wrote:
>> TheFlyingDutchman wrote:
>>> On Sep 12, 5:30 pm, Amer Neely <perl4h... at softouch.on.ca> wrote:
>>>> I'm a complete newbie with Python, but have several years experience
>>>> with Perl in a web environment.
>>>>
>>>> A question I have, if someone here is familiar with Perl, does Python
>>>> have something like Perl's 'here document'? I've just searched and read
>>>> some postings on generating HTML but they all seem to refer to various
>>>> template utilities. Is this the only way, or am I missing something? I'm
>>>> used to generating X/HTML by hand, which makes the here document in Perl
>>>> ideal for me. Also, many times a client already existing HTML code that
>>>> I can use in a script.
>>>>
>>>> -- 
>>>> Amer Neely
>>>> w:www.webmechanic.softouch.on.ca/
>>>> Perl | MySQL programming for all data entry forms.
>>>> "Others make web sites. We make web sites work!"
>>>
>>> I am not sure if this is what you are looking for, but Python has a
>>> special string with 3 quotes that I believe duplicates part of the
>>> functionality of a here document:
>>>
>>> myHmtlHeader = """
>>> <head attribute = "abc">
>>> <title>My Page</title>
>>> </head>
>>> """
>>>
>>> print myHtmlHeader
>>>
>>>
>>> outputs:
>>>
>>>
>>> <head attribute="abc">
>>> <title>My Page</title>
>>> </head>
>>>
>> 
>> Well, I have checked everything I can but I'm getting '500 Internal 
>> Server Error'. The log files aren't helpful:
>> [Thu Sep 13 03:43:00 2007] [error] [client 24.235.184.39] Premature end 
>> of script headers: /home/softouch/public_html/cgi-bin/scratch/hello.py
>> 
>> I can't even get it to run on my home PC running Apache + Win2K. Same 
>> error.
>> 
>> My script:
>> #!/usr/bin/python
>> import cgitb; cgitb.enable(display=0, logdir=".")
>> import sys
>> sys.stderr = sys.stdout
>> print "Content-Type: text/html"
>> print
>> 
>> print """
>> <html>
>> <body>
>> <div align="center"><font style="font-family:verdana; size:18px">Hello 
>> from Python</font></div>
>> <br>
>> Goodbye.
>> </body>
>> </html>
>> """
>> 
>
>I should have added that it runs from the command line OK.
			.
			.
			.
Yes, it should work fine.  Do the things you'd do if it were Perl source:
when you say "it runs from the command line OK", do you mean invocation of
/home/softouch/public_html/cgi-bin/scratch/hello.py gives sensible results?
Does your Web server recognize that .py is a CGI extension?  What are the
permissions on /home/softouch/public_html/cgi-bin/scratch/hello.py?

Might your server have an issue with "Content-Type" vs. "Content-type"?


From ivlenin at gmail.com  Fri Sep 14 13:57:12 2007
From: ivlenin at gmail.com (I V)
Date: Fri, 14 Sep 2007 17:57:12 GMT
Subject: Coming from Perl - SOLVED
References: <Cv%Fi.198$372.59@read2.cgocable.net>
	<QvnGi.2216$tx1.843@read1.cgocable.net>
Message-ID: <YXzGi.2335$4J3.0@newssvr22.news.prodigy.net>

On Thu, 13 Sep 2007 23:49:32 -0400, Amer Neely wrote:
> In trying to track down why this script would not run on my host, it has
> to come to light that Python is installed, however the Apache module is
> not. So, short story is - I was flogging a dead horse.

Which Apache module? You don't need any special modules (just the regular 
CGI one) to use python in a CGI script.


From fw3 at hotmail.co.jp  Fri Sep  7 19:53:48 2007
From: fw3 at hotmail.co.jp (wang frank)
Date: Fri, 07 Sep 2007 23:53:48 +0000
Subject: Speed of Python
In-Reply-To: <5ke4h3F31i6hU9@mid.uni-berlin.de>
Message-ID: <BAY122-F38DA18DFCAF9A0F5EF3189B4C50@phx.gbl>

I am just trying to compare the speed with matlab. The arrange is used for 
another test, that is why it shows up in the mail.

Thanks

Frank


>From: "Marc 'BlackJack' Rintsch" <bj_666 at gmx.net>
>To: python-list at python.org
>Subject: Re: Speed of Python
>Date: 7 Sep 2007 23:17:55 GMT
>
>On Fri, 07 Sep 2007 22:59:26 +0000, wang frank wrote:
>
> > I also have tried to use numpy to speed it up. However, surprisingly, 
it is
> > slower than the pure python code.
> >
> > Here is the code:
> > import  numpy
> > arange=numpy.arange
> > nlog=numpy.log
> > def bench6(n):
> > 	for i in xrange(n):
> > 		for j in xrange(1000):
> > 			m=j+1
> > 			z=nlog(m)
> > 			z1=nlog(m+1)
> > 			z2=nlog(m+2)
> > 			z3=nlog(m+3)
> > 			z4=nlog(m+4)
> > 			z5=nlog(m+5)
> > 			z6=nlog(m+6)
> > 			z7=nlog(m+7)
> > 			z8=nlog(m+8)
> > 			z9=nlog(m+9)
> > 	return z9
> >
> > [??]
> >
> > Anyone know why?
>
>Because you don't really take advantage of `numpy`.  The `numpy.log()`
>function can be used with scalars but I guess it is slower because it has
>to check if its argument is a scalar or array.  Untested:
>
>from numpy import arange, log as nlog
>
>def bench6(n):
>     for dummy in xrange(n):
>         for j in xrange(1000):
>             z = nlog(arange(j + 1, j + 11))
>     return z[-1]
>--
>http://mail.python.org/mailman/listinfo/python-list

_________________________________________________________________
3?????????????????3?????????? ?????2.2???
? http://clk.atdmt.com/GBL/go/msnjpqjl0060000010gbl/direct/01/ 



From arnodel at googlemail.com  Mon Sep 17 14:28:27 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Mon, 17 Sep 2007 18:28:27 -0000
Subject: =?iso-8859-1?q?Re:_I=B4m_trying_to_desenvolve_a_site_in_python?=
In-Reply-To: <5l7uglF6kto9U1@mid.individual.net>
References: <1190051850.198096.258890@o80g2000hse.googlegroups.com>
	<5l7uglF6kto9U1@mid.individual.net>
Message-ID: <1190053707.193010.159350@n39g2000hsh.googlegroups.com>

On Sep 17, 7:14 pm, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:
> Andre P.S Duarte wrote:
> > I?m trying to desenvolve a site in python.
>
> What does "desenvolve" mean? By "site", do you mean a web site?
>

"desenvolver" is a spanish verb meaning "to develop".

--
Arnaud




From deets at nospam.web.de  Wed Sep  5 09:41:52 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 05 Sep 2007 15:41:52 +0200
Subject: handling modules in packages
References: <mailman.83.1188997436.2658.python-list@python.org>
Message-ID: <5k7q10F2e6haU1@mid.uni-berlin.de>

Tommy Grav wrote:

> Hi,
> 
>    I am working on a package that contains a number of
> different modules:
> 
>  > ls pyAstro
> __init__.py
> constants.py
> conversion.py
> observation.py
> orbit.py
> transformation.py
> 
> however, I find that several of the modules have the
> same import statements:
> 
> orbit.py:
> 
> import numpy
> import constants
> import conversion
> import observations
> 
> observations.py:
> 
> import numpy
> import constants
> import conversions
> import transformations
> 
> The modules themselves are not overly large, but it bugs
> me to have to import numpy twice (or even more as the
> number of modules grow). Is there a way to import numpy
> once in the package (like in the __init__.py file) such that
> it is accessible to all the modules? Or is the multiple imports
> just something one has to live with?

Essentially, yes. That's the way it is, and it's better for understanding
how things work in the respective submodules.

However, you can stuff things into the __builtins__-module using setattr,
and thus make names known globally.

But it's a hack, and it means that you possibly create conflicts if
different modules have different ideas on what is supposed to live under
one key.

so - don't do it. And live with the imports. After all, that's only c'n'p,
and not of the bad kind.

Diez


From carsten at uniqsys.com  Thu Sep  6 10:24:43 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 06 Sep 2007 10:24:43 -0400
Subject: startswith( prefix[, start[, end]])  Query
In-Reply-To: <1189087752.538726.101350@r29g2000hsg.googlegroups.com>
References: <1189087752.538726.101350@r29g2000hsg.googlegroups.com>
Message-ID: <1189088683.3376.5.camel@dot.uniqsys.com>

On Thu, 2007-09-06 at 07:09 -0700, cjt22 at bath.ac.uk wrote:
> Hi
> 
> startswith( prefix[, start[, end]])  States:
> 
> Return True if string starts with the prefix, otherwise return False.
> prefix can also be a tuple of suffixes to look for. However when I try
> and add a tuple of suffixes I get the following error:
> 
> Type Error: expected a character buffer object

You are probably looking at the documentation for Python 2.5, but you're
using Python 2.4 or older:

#######################################################################
Python 2.5 (r25:51908, Oct 28 2006, 12:26:14) 
[GCC 4.1.1 20060525 (Red Hat 4.1.1-1)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> "blah".startswith(("a","b"))
True
#######################################################################
Python 2.4.3 (#1, Oct 23 2006, 14:19:47) 
[GCC 4.1.1 20060525 (Red Hat 4.1.1-1)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> "blah".startswith(("a","b"))
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: expected a character buffer object
#######################################################################

HTH,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From LISTSERV at LISTSERV.AOL.COM  Sun Sep  9 23:14:46 2007
From: LISTSERV at LISTSERV.AOL.COM (LISTSERV at LISTSERV.AOL.COM)
Date: Sun, 9 Sep 2007 23:14:46 -0400
Subject: Message ("Your message dated Sun, 9 Sep 2007 23:15:08 -0400...")
Message-ID: <LISTSERV%200709092314468556.0D52@LISTSERV.AOL.COM>

Your message dated Sun, 9 Sep 2007 23:15:08 -0400 with subject "Returned
mail: Data  format error"  has been  submitted to  the moderator  of the
CSICOP-ANNOUNCE list: Barry Karr <SkeptInq at AOL.COM>.


From naga86 at gmail.com  Mon Sep 10 07:46:02 2007
From: naga86 at gmail.com (Nagarajan)
Date: Mon, 10 Sep 2007 04:46:02 -0700
Subject: less obvious "super"
In-Reply-To: <Xns99A77DA03E585duncanbooth@127.0.0.1>
References: <1189417830.645749.226120@d55g2000hsg.googlegroups.com>
	<Xns99A77DA03E585duncanbooth@127.0.0.1>
Message-ID: <1189424762.591411.99760@d55g2000hsg.googlegroups.com>

On Sep 10, 4:20 pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> Nagarajan <nag... at gmail.com> wrote:
> > Here is what I need to achieve..
>
> > class A :
> >     def __init__( self ):
> >         self.x  = 0
>
> Don't use old style classes. If you are planning to use 'super' then you
> must use new-style classes, so use 'object' as a base class here.
>
>
>
> > class B ( A ):
> >     def __init__( self, something ):
> >         # Use "super" construct here so that I can "inherit" x of A
> >         self.y  = something
>
> > How should I use "super" so that I could access the variable "x" of A
> > in B?
>
> If you aren't worried about diamond shaped multiple inheritance
> hierarchies then just use:
>
> class B ( A ):
>     def __init__( self, something ):
>         A.__init__(self)
>         self.y  = something
>
> If you are then:
>
> class B ( A ):
>     def __init__( self, something ):
>         super(B, self).__init__()
>         self.y  = something
>
> When you use super you usually just want the current class and current
> instance as parameters. Putting that together:
>
> >>> class A(object):
>
>     def __init__( self ):
>         self.x  = 0
>
> >>> class B ( A ):
>
>     def __init__( self, something ):
>         super(B, self).__init__()
>         self.y  = something
>
>
>
> >>> obj = B(3)
> >>> obj.x
> 0
> >>> obj.y
> 3


What's the difference b/w:
     class A:
and
     class A ( object ):

Thanks.



From arnodel at googlemail.com  Sun Sep  2 05:27:43 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sun, 02 Sep 2007 02:27:43 -0700
Subject: howto compile recursively all *.py files to *.pyc (from a
	directory my_dir)?
In-Reply-To: <1188714081.476816.310350@50g2000hsm.googlegroups.com>
References: <1188714081.476816.310350@50g2000hsm.googlegroups.com>
Message-ID: <1188725263.502586.217560@o80g2000hse.googlegroups.com>

On Sep 2, 7:21 am, dmitrey <open... at ukr.net> wrote:
> howto compile recursively all *.py files to *.pyc (from a directory
> my_dir)?
> Thank you in advance, D.

import compileall
compileall.compile_dir('my/python/project/')

--
Arnaud




From python.list at tim.thechases.com  Sun Sep 30 12:59:07 2007
From: python.list at tim.thechases.com (Tim Chase)
Date: Sun, 30 Sep 2007 11:59:07 -0500
Subject: s.split() on multiple separators
In-Reply-To: <1191160394.870241.171200@w3g2000hsg.googlegroups.com>
References: <1191160394.870241.171200@w3g2000hsg.googlegroups.com>
Message-ID: <46FFD5DB.5080504@tim.thechases.com>

> OK, so I want to split a string c into words using several different
> separators from a list (dels).
> 
> I can do this the following C-like way:
> 
>>>> c=' abcde abc cba fdsa bcd '.split()
>>>> dels='ce '
>>>> for j in dels:
> 	cp=[]
> 	for i in xrange(0,len(c)-1):
> 		cp.extend(c[i].split(j))
> 	c=cp
> 
> 
>>>> c
> ['ab', 'd', '', 'ab', '', '']


Given your original string, I'm not sure how that would be the
expected result of "split c on the characters in dels".

While there's a certain faction of pythonistas that don't esteem
regular expressions (or at least find them overused/misused,
which I'd certainly agree to), they may be able to serve your
purposes well:

  >>> c=' abcde abc cba fdsa bcd '
  >>> import re
  >>> r = re.compile('[ce ]')
  >>> r.split(c)
  ['', 'ab', 'd', '', 'ab', '', '', 'ba', 'fdsa', 'b', 'd', '']

given that a regexp object has a split() method.

-tkc





From tedpottel at gmail.com  Fri Sep 21 13:32:44 2007
From: tedpottel at gmail.com (tedpottel at gmail.com)
Date: Fri, 21 Sep 2007 10:32:44 -0700
Subject: TRying to import files from my folder not pythons lib folder
Message-ID: <1190395964.541835.114350@50g2000hsm.googlegroups.com>

Hi,

I'm trying to create my own lib of functions, but it seems like I can
only import them if they are in pythons lib folder.

Example
I have a folder called
K:\mypython

Now in the interactive python shell I type
Import k:\mypython\listall
And get a error on :

If I store listall.py in pythons lib folder and type
Limport listall

It works fins.

Can I create my own library of functions and store them in a separate
dir????

Also I try to creat a folder in pythomns lib folder and that did not
work

Help
-Ted



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Sep 13 08:05:39 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 13 Sep 2007 14:05:39 +0200
Subject: struct is saving 4 bytes instead of 2
References: <1189632217.661924.25520@r34g2000hsd.googlegroups.com>
	<5kr8fkF53m8gU1@mid.individual.net>
	<1189640178.267346.321040@r34g2000hsd.googlegroups.com>
Message-ID: <5ksncjF5c2s1U1@mid.individual.net>

TonyB wrote:
> I tried
> 
> f.write(struct.pack('=h',thevariable))
> 
> and it works.

Great! :) 

Regards,


Bj?rn

-- 
BOFH excuse #45:

virus attack, luser responsible



From michael at stroeder.com  Wed Sep 12 05:21:48 2007
From: michael at stroeder.com (=?ISO-8859-1?Q?Michael_Str=F6der?=)
Date: Wed, 12 Sep 2007 11:21:48 +0200
Subject: Get Only the Last Items in a Traceback
In-Reply-To: <1189562968.529414.27910@w3g2000hsg.googlegroups.com>
References: <1189562968.529414.27910@w3g2000hsg.googlegroups.com>
Message-ID: <dmnkr4-dpq.ln1@nb2.stroeder.com>

gregpinero at gmail.com wrote:
> I'm running code via the "exec in context" statement within a much
> larger program.  What I would like to do is capture any possible
> errors and show a pretty traceback just like the Python interactive
> interpreter does, but only show the part of the traceback relating to
> the code sent to exec.
> 
> For example here is the code I'm using:
> 
> try:
>     exec code
> except Exception,Err:
>     traceback.print_exc()

Guess what's argument limit is for. Excerpt from the Python docs:

-------------------------------- snip --------------------------------
print_exc(  	[limit[, file]])
    This is a shorthand for print_exception(sys.exc_type, sys.exc_value,
sys.exc_traceback, limit, file). (In fact, it uses sys.exc_info() to
retrieve the same information in a thread-safe way instead of using the
deprecated variables.)
-------------------------------- snip --------------------------------

Ciao, Michael.


From andre.roberge at gmail.com  Sun Sep  2 23:56:43 2007
From: andre.roberge at gmail.com (=?iso-8859-1?B?QW5kcuk=?=)
Date: Mon, 03 Sep 2007 03:56:43 -0000
Subject: Crunchy release 0.9.8
Message-ID: <1188791803.621269.276170@19g2000hsx.googlegroups.com>

Crunchy version 0.9.8 has been released.

Crunchy is an application that transforms static html-based Python
tutorials into interactive sessions within your browser (Firefox;
other browsers *may* not fully support Crunchy).

Crunchy is available from http://code.google.com/p/crunchy

Since the last public release, the following changes have been
introduced:

* Important changes to security model.
  + 6 security levels.
* New interpreter types
* New interpreter options.
* New option (used by default) to view tutorials that have no Crunchy-
specific markup.
* More documentation.
* Friendlier tracebacks (for Python beginners) - translatable in
languages other than English.
* Automatic updating of sys.path so that tutorials can make use of
Python's import statement.
* More configuration options.
* New math_graphics module.
* New logo.
* New look.
* French translation of Crunchy/Python messages (not documentation)
almost complete.
+ many more.

Bug reports, comments and suggestions are always welcome.

Andr?



From sidnei at enfoldsystems.com  Mon Sep 24 16:49:01 2007
From: sidnei at enfoldsystems.com (Sidnei da Silva)
Date: Mon, 24 Sep 2007 17:49:01 -0300
Subject: [lxml-dev] Python script to optimize XML text
In-Reply-To: <496954360709241336i43173947sda5245c2d7477ecb@mail.gmail.com>
References: <496954360709241336i43173947sda5245c2d7477ecb@mail.gmail.com>
Message-ID: <a7a2b76b0709241349hb70431cn69386f25a14a29ee@mail.gmail.com>

If your XML is well-formed, a XSLT is probably your best choice. I
believe even the most trivial 'pass through' example might produce the
output you expect here.

-- 
Sidnei da Silva
Enfold Systems                http://enfoldsystems.com
Fax +1 832 201 8856     Office +1 713 942 2377 Ext 214


From bj_666 at gmx.net  Wed Sep 12 17:55:04 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 12 Sep 2007 21:55:04 GMT
Subject: Implementing a fixed size stack for an RPN Calculator
References: <1189630522.152326.3040@d55g2000hsg.googlegroups.com>
Message-ID: <5kr5hoF4s6gmU3@mid.uni-berlin.de>

On Wed, 12 Sep 2007 20:55:22 +0000, rami.mawas at gmail.com wrote:

> I have implemented an RPN calculator in python but now I would like to
> make the stack size fixed. how can I transform the user's RPN
> expression from a stack overflow to a computable expression.
> 
> For instance, if my stack size is 2 then the some expression can't be
> computed but could be transformed as following:
> 
> Non computable expression: 1 2 3 + +   --> stack size of 3 is needed
> Computable expression: 1 2 + 3 +         --> stack size of 2 is needed
> 
> How can I define a formal way of transforming the non computable
> expression to computable one.
> 
> My RPN only implements: + - x %

Why does this homework assignment limit the stack so severely!?  ;-)

Ciao,
	Marc 'BlackJack' Rintsch


From software at ginstrom.com  Wed Sep 19 08:03:04 2007
From: software at ginstrom.com (Ryan Ginstrom)
Date: Wed, 19 Sep 2007 21:03:04 +0900
Subject: lambda-funcs problem
In-Reply-To: <1190201984.062329.182460@k79g2000hse.googlegroups.com>
References: <1190201984.062329.182460@k79g2000hse.googlegroups.com>
Message-ID: <06eb01c7fab5$0aa2bb50$0203a8c0@MOUSE>

> On Behalf Of dmitrey.kroshko at scipy.org
> F = []
> for i in xrange(N):
>     F.append(lambda x: x + i)
> 
> however, the example don't work - since i in end is N-1 it yields x+
> (N-1) for any func.

How about:

>>> def make_adder(i):
	def adder(x):
		return x+i
	return adder

>>> funcs = [make_adder(i) for i in xrange(10)]
>>> print [func(10) for func in funcs]
[10, 11, 12, 13, 14, 15, 16, 17, 18, 19]
>>> 

Regards,
Ryan Ginstrom



From grante at visi.com  Thu Sep 20 12:27:29 2007
From: grante at visi.com (Grant Edwards)
Date: Thu, 20 Sep 2007 16:27:29 -0000
Subject: Python and RTF
References: <1190271676.160077.99270@w3g2000hsg.googlegroups.com>
	<13f51i4adkseae5@corp.supernews.com>
	<1190301666.417426.13320@r29g2000hsg.googlegroups.com>
Message-ID: <13f57rhcoh575ea@corp.supernews.com>

On 2007-09-20, Marco Bonifazi <marcobonifazi at gmail.com> wrote:

>> FWIW, I've added support for EMF graphics and enhanced the
>> scaling options for graphics:
>>
>> http://groups.google.com/group/comp.lang.python.announce/browse_threa...

> Oh, wonderful! Is licensed with the GPL and LGPL as like the
> previous versions are?

Yes.

> Then, can I put in my closed software and at the end of my
> development make a donation?

I'm really sure how the LGPL applies to Python applications.
AFAICT, it's been abandoned by the original developer, so I
doubt he's going to sue you. ;)

If you fix any bugs or add any features, it would be nice if
you'd send me a patch.

-- 
Grant Edwards                   grante             Yow! There's enough money
                                  at               here to buy 5000 cans of
                               visi.com            Noodle-Roni!


From jergosh at wp.pl  Thu Sep  6 17:00:56 2007
From: jergosh at wp.pl (=?UTF-8?B?R3J6ZWdvcnogU8WCb2Rrb3dpY3o=?=)
Date: Thu, 06 Sep 2007 23:00:56 +0200
Subject: So what exactly is a complex number?
In-Reply-To: <op.tx7mbdidx6zn5v@gabriel2.softlabbsas.com.ar>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>	<mailman.212.1188576194.28954.python-list@python.org>	<451mq4-les.ln1@ozzie.tundraware.com>	<mailman.266.1188644067.28954.python-list@python.org>	<lbjpq4-eo22.ln1@ozzie.tundraware.com>	<mailman.310.1188805355.28954.python-list@python.org>	<1188821241.516029.229020@o80g2000hse.googlegroups.com>	<46DE7AB9.9000702@wp.pl>
	<op.tx7mbdidx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <46E06A88.60800@wp.pl>

Gabriel Genellina wrote:
> En Wed, 05 Sep 2007 06:45:29 -0300, Grzegorz S?odkowicz <jergosh at wp.pl>  
> escribi?:
>
>   
>> I believe vectors can only be added if they have the same point of
>> application. The result is then applied to the same point.
>>     
>
> You are talking about "forces", not "vectors" in general. Using the "point  
> of application" is just a convenient way of condensing two things: the  
> resultant force -a vector- and the resultant momentum -a pseudovector-  
> into a single entity, and only makes sense for a rigid body.
>From the Wikipedia (http://en.wikipedia.org/wiki/Vector_%28spatial%29): "Two vectors sharing the same initial point can also be added or subtracted."


Regards,
Greg


From kay.schluehr at gmx.net  Wed Sep 19 23:01:52 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Wed, 19 Sep 2007 20:01:52 -0700
Subject: limiting memory consumption of Python itself or a dict in a
	Python program
In-Reply-To: <1190234913.608070.5410@19g2000hsx.googlegroups.com>
References: <1190234913.608070.5410@19g2000hsx.googlegroups.com>
Message-ID: <1190257312.419152.304580@g4g2000hsf.googlegroups.com>

On 19 Sep., 22:48, Jonas Maurus <jonas.mau... at gmail.com> wrote:
> Hello everybody,
>
> I'm pondering the following problem:
>
> I want to write a Python program that receives messages via SMTP and
> stores them in a dict or an array. For my purposes it would be
> important that all received mail would be kept in RAM and not cached
> out to disk. If a new message comes in that can't fit in the allocated
> memory, a number of old messages would be discarded.
>
> As the server needs to have room for other tasks, I'd like to limit
> the overall memory consumption to a certain amount.
>
> Is this possible? How would I go about implementing it? By imposing
> "ulimit"s and catching MemoryError?
>
> Thanks for your help,
> Jonas

When your application pre-allocates a chunk of memory and use
datatypes like array and struct you might write your own memory
manager. You can't control the total memory consumption of Python
though, since Python implements an own malloc and it might allocate
memory in large chunks. But this is somewhat orthogonal to your
problem and applies also when Python reads/writes buffers from/to
disk.



From hall.jeff at gmail.com  Sat Sep 29 12:46:18 2007
From: hall.jeff at gmail.com (hall.jeff at gmail.com)
Date: Sat, 29 Sep 2007 16:46:18 -0000
Subject: Program inefficiency?
In-Reply-To: <mailman.1282.1191082697.2658.python-list@python.org>
References: <NYOBGCEXSMTP22SiTqg00150043@NYOBGCEXSMTP22.uswin.ad.vzwcorp.com>
	<mailman.1282.1191082697.2658.python-list@python.org>
Message-ID: <1191084378.478623.321740@r29g2000hsg.googlegroups.com>

XP is the OS... the files are split across a ton of subdirectories
already...

I'm actually starting to think there's a problem with certain files,
however...

We create help files for clients using RoboHelp... RoboHelp has Source
HTML and then "webhelp" html which is what actually goes to the
client... I'm trying to mass maintenance the "source" files... Right
now, my program works but you've got to delete the webhelp files
first... I figured that (based on the exponential growth in processing
time) it was the additional number of files... However, after
streamlining the codes I got the following results

done 300
4.1904767226e-006
done 600
7.97062280262
done 900
22.3963802662
done 1200
29.9211888662
done
1375
35.3465962853

with the webhelp deleted and

done 300
4.1904767226e-006
done 600
7.6259175398
done 900
13.3994678095
still processing 10 minutes later

with the webhelp intact

Since the system didn't hang sometime after 1375 (and in fact, still
hasn't made it there), I can only assume that it hit one of the
webhelp files and freaked out...

The thing that's really weird is that the files it's hanging on appear
to be some of the most basic files in the whole system (small, not
alot going on... no hits on the RE search)... So I may just tell the
users to delete the webhelp and have robohelp recreate it after
they've run the program...



From michael at jedimindworks.com  Sun Sep  2 16:25:06 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Sun, 2 Sep 2007 13:25:06 -0700
Subject: how can I find out the process ids with a process name
In-Reply-To: <1188761187.522146.192380@y42g2000hsy.googlegroups.com>
References: <1188761187.522146.192380@y42g2000hsy.googlegroups.com>
Message-ID: <12B3D8EF-C30A-4BCC-80A5-71ADFA8F6944@jedimindworks.com>


On Sep 2, 2007, at 12:26 PM, herman wrote:

> I would like to find out all the process id with the process name
> 'emacs'.
>
> In the shell, i can do this:
>
> $ ps -ef |grep emacs
> root     20731  8690  0 12:37 pts/2    00:00:09 emacs-snapshot-gtk
> root  25649 25357  0 13:55 pts/9    00:00:05 emacs-snapshot-gtk rtp.c
> root  26319 23926  0 14:06 pts/7    00:00:04 emacs-snapshot-gtk
> stressTestVideo.py
> root  26985     1  0 14:15 ?        00:00:01 /usr/bin/emacs-snapshot-
> gtk
> root     27472 21066  0 14:23 pts/5    00:00:00 grep emacs
>
>
> and I can see the process id is 20731, 25649, etc, etc.
>
> But now I would like to do the programmically in my python script.
> I know I can use ' os.system(cmd)' to execute the command 'ps -ef |
> grep emacs', but how
> can I pipe the output of my 'ps -ef | grep emacs' to my python script
> and then run a regression expression with it to get the process Ids?

Are you targeting Linux?  If so, have a look at the /proc system.   
Each process has a directory, and the 'status' file in each process'  
directory tells many things, including process name (the line that  
ends with the process name, begins with 'Name').

Here's a quick bashy way to get pid + process names:

cd /proc
for i in ls [0-9]*/status
do
     echo $i `grep '^Name' $i | cut -f2` | sed 's/\/status//g'
done


hth,
Michael
---
"If we had asked people what they wanted they would have said 'a  
faster horse'."  --Henry Ford




From daniel.j.larsson at gmail.com  Mon Sep 17 08:25:46 2007
From: daniel.j.larsson at gmail.com (Daniel Larsson)
Date: Mon, 17 Sep 2007 14:25:46 +0200
Subject: Python 3K or Python 2.9?
In-Reply-To: <20070913191341.69dae855@cube.tz.axivion.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<87sl5j5r34.fsf@benfinney.id.au>
	<1189646281.569796.267940@d55g2000hsg.googlegroups.com>
	<87ir6f5mrq.fsf@benfinney.id.au>
	<1189651204.408268.57580@19g2000hsx.googlegroups.com>
	<1i4dddf.piaojwz9lz40N%aleax@mac.com>
	<1189700775.661780.292150@50g2000hsm.googlegroups.com>
	<20070913191341.69dae855@cube.tz.axivion.com>
Message-ID: <2bfa72fa0709170525w1fcb734fxedf6fac70ecbc8a1@mail.gmail.com>

On 9/13/07, Stefan Bellon <sbellon at sbellon.de> wrote:
>
> On Thu, 13 Sep, TheFlyingDutchman wrote:
>
> > Bruce said that no other mainstream OO language is explicitly passing
> > the object as a parameter to class methods.
>
> Ada 95 does. And Ada 95 was the first standardized OO language.


Now that's debatable :)

"SIMULA 67 was formally standardized on the first meeting of the SIMULA
Standards Group (SSG) in February 1968."

 http://en.wikipedia.org/wiki/Simula
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From f.guerrieri at gmail.com  Tue Sep 18 15:38:20 2007
From: f.guerrieri at gmail.com (Francesco Guerrieri)
Date: Tue, 18 Sep 2007 21:38:20 +0200
Subject: Wait For Application Start
In-Reply-To: <5AF03B37-0D8A-457E-8995-8C4E578C9550@jedimindworks.com>
References: <120025966304300060@unknownmsgid>
	<79b79e730709180540q2045a086rc6a049f16bd7e7ad@mail.gmail.com>
	<5AF03B37-0D8A-457E-8995-8C4E578C9550@jedimindworks.com>
Message-ID: <79b79e730709181238s4bf5d7f3y574bcecbe0823421@mail.gmail.com>

On 9/18/07, Michael Bentley <michael at jedimindworks.com> wrote:

> >
> > import os.path
> > import time
> >
> > while True:
> >     if os.path.exists(YOUR_FILE):
> >         break
> >     time.sleep(30)
>
> or
>
> while not os.path.exists(YOUR_FILE):
>      time.sleep(1)

I thought of that, but I found more readable the positive form :-)

francesco


From zzbbaadd at aol.com  Tue Sep 11 23:33:05 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Tue, 11 Sep 2007 20:33:05 -0700
Subject: Get the complete command line as-is
In-Reply-To: <1189566000.793354.308420@19g2000hsx.googlegroups.com>
References: <1189566000.793354.308420@19g2000hsx.googlegroups.com>
Message-ID: <1189567985.089215.108250@k79g2000hse.googlegroups.com>

On Sep 11, 8:00 pm, wangzq <wan... at gmail.com> wrote:
> Hello,
>
> I'm passing command line parameters to my browser, I need to pass the
> complete command line as-is, for example:
>
> test.py "abc def" xyz
>
> If I use ' '.join(sys.argv[1:]), then the double quotes around "abc
> def" is gone, but I need to pass the complete command line ("abc def"
> xyz) to the browser, how can I do this?
>
> I'm on Windows.
>
> Thanks.

I'm on Solaris and this works for me:

test.py '"abc def" xyz'



print sys.arv[1]

"abc def" xyz



From hniksic at xemacs.org  Wed Sep 19 03:22:36 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Wed, 19 Sep 2007 09:22:36 +0200
Subject: super() doesn't get superclass
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<87abrkhtfp.fsf@mulj.homelinux.net> <871wcvzhvc.fsf@benfinney.id.au>
Message-ID: <87odfz5dc3.fsf@mulj.homelinux.net>

Ben Finney <bignose+hates-spam at benfinney.id.au> writes:

> Hrvoje Niksic <hniksic at xemacs.org> writes:
>
>> class X(Y):
>>   def foo(self):
>>     super(X, self).foo()
>> 
>> ...there is in fact no guarantee that super() calls a superclass of
>> X.  However, it is certainly guaranteed that it will call a superclass
>> of type(self).
>
> Not even that. It could call *any class in the inheritance
> hierarchy*,

The inheritance hierarchiy is populated by the various (direct and
indirect) superclasses of type(self).

> depending on how the MRO has resolved "next class". Even one that is
> neither an ancestor nor a descendant of X.

My point exactly.  superclass of X is not the same as superclass of
type(self).  Super iterates over the latter, where you expect the
former.


From jeremy+complangpython at jeremysanders.net  Thu Sep 20 05:10:08 2007
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Thu, 20 Sep 2007 10:10:08 +0100
Subject: limiting memory consumption of Python itself or a dict in a
	Python program
References: <1190234913.608070.5410@19g2000hsx.googlegroups.com>
Message-ID: <fctddg$5se$1@gemini.csx.cam.ac.uk>

Jonas Maurus wrote:

> I want to write a Python program that receives messages via SMTP and
> stores them in a dict or an array. For my purposes it would be
> important that all received mail would be kept in RAM and not cached
> out to disk. If a new message comes in that can't fit in the allocated
> memory, a number of old messages would be discarded.
> 
> As the server needs to have room for other tasks, I'd like to limit
> the overall memory consumption to a certain amount.

Since your data is all in one place, why not write a dict or list wrapper
which keeps track of the total space of the items stored (using len on the
strings)?

It could automatically clean out old entries when the memory usage becomes
too much.

Jeremy

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


From jfine at pytex.org  Tue Sep 18 09:55:18 2007
From: jfine at pytex.org (Jonathan Fine)
Date: Tue, 18 Sep 2007 14:55:18 +0100
Subject: [ANN] Metatest 0.1.0
Message-ID: <mailman.721.1190126947.2658.python-announce-list@python.org>

Hello

This announcement also appears on the Metatest web site 
http://metatest.sourceforge.net

===
*** Metatest - a Python test framework

Metatest is a simple and elegant Python framework for writing tests.

Metatest is mostly about writing tests and by design is not tied to any 
particular test runner. Hence the name.

Here's how to write some tests using Metatest. We can think of the tests 
as an executable specification.

     from metatest.py.mymod import plus, Point

     # Function plus adds two numbers.
     plus(2, 2) == 4
     plus(2, '', _ex=TypeError)

     # Class Point represent a point in the plane.
     p = Point(2, 5)
     p.x == 2
     p.y == 5
     p.area == 10

And here's one way to run them.

     if __name__ == '__main__':
         import metatest
         metatest.run()

It's not hard to write an adapter that will run these tests in a 
different test runner framework.

We gave a talk about Metatest at PyCon UK 2007 and here are the slides 
(HTML).
     http://www.pyconuk.org
     http://metatest.sourceforge.net/doc/pyconuk2007/metatest.html

Please visit Sourceforge to download Metatest.
     http://sourceforge.net/project/showfiles.php?group_id=204046

-- 
Jonathan Fine



From duncan.booth at invalid.invalid  Wed Sep 26 06:02:31 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 26 Sep 2007 10:02:31 GMT
Subject: Confused about 'positive lookbehind assertion'
References: <496954360709241938k6baf1009gc7cab215ad16b12f@mail.gmail.com>
	<mailman.1049.1190732512.2658.python-list@python.org>
	<1190753752.126335.205410@o80g2000hse.googlegroups.com>
	<mailman.1066.1190757676.2658.python-list@python.org>
Message-ID: <Xns99B76F0BE9AF9duncanbooth@127.0.0.1>

"Andrew Durdin" <adurdin at gmail.com> wrote:

> On 9/25/07, Karthik Gurusamy <kar1107 at gmail.com> wrote:
>>
>> Any idea what this positive lookbehind achieves which can't be done
>> without it.
>> I remember cases where positive look-ahead is useful.
>>
>> In the above example, r.search('abcdef') does the job of ensuring
>> 'def' is preceded by 'abc'.
> 
> AFAICT the only benefit I can see is that the lookbehind isn't
> captured, so (a) it's not included in match.group(n), and (b)
> match.start(), match.end(), and match.span() return the offsets of the
> bit you actually wanted to capture.

It also makes a difference if you are searching for multiple patterns and 
the lookbehind overlaps the previous result:

>>> re.findall('(?<=abc)(abc|def)', 'abcabcdef')
['abc', 'def']

I think though that its real use is not at the beginning of a pattern but 
in the middle: you might have a greedy pattern which matches too easily 
(possibly to create a group), and then a guard which looks behind. e.g. 

>>> re.findall('(\d*)((?<=1)a|(?<=2)b)', '111a 111b 222b')
[('111', 'a'), ('222', 'b')]

This pattern finds all numbers ending in 1 followed by 'a', or ending in 2 
followed by 'b' and it returns groups containing the number and the 
trailing letter. You could write '\d*(1a|2b)' but that doesn't get you the 
correct groups.


From wizzardx at gmail.com  Tue Sep 11 14:21:27 2007
From: wizzardx at gmail.com (David)
Date: Tue, 11 Sep 2007 20:21:27 +0200
Subject: customizing a logging logger
In-Reply-To: <1189527296.426004.17600@19g2000hsx.googlegroups.com>
References: <1187412814.493872.325190@j4g2000prf.googlegroups.com>
	<1189527296.426004.17600@19g2000hsx.googlegroups.com>
Message-ID: <18c1e6480709111121od75650bi9ec814f9bdcaad5e@mail.gmail.com>

On 9/11/07, garyjefferson123 at gmail.com <garyjefferson123 at gmail.com> wrote:
> I think the following question is clearer.
>
> I want to make it so that method1 below can be transformed:
>
> logger = logging.getLogger("somelogger")
> class SomeOp:
>     def __init__(self, ctx):
>         self.ctx = ctx
>     def method1(self):
>         logger.info("%s: here's a message", self.ctx)
>         logger.debug("%s: msg #2", self.ctx)
>         v = 'yessir'
>         logger.debug("%s: msg #3 %s", self.ctx, v)
>
> into something like:
>
>     def method1(self):
>         logger.info("here's a message")
>         logger.debug("msg #2")
>         v = 'yessir'
>         logger.debug("msg #3 %s", v)
>
>
> What is the best way to do this, so that I don't have to manually put
> the self.ctx in the log string in hundreds of different places?

One way to do it is to make a mixin class (eg: ContextLogging)  which
you construct with the context string. The mixin constructor has a
line like this:

self.logger = logging.getLogger(ctx).

(assuming your context string is appropriate for a logger name)

Then your methods call self.logger instead of the module-level logger.

Another method is also to use a mixin class, which provides methods
"log_debug", "log_info", etc methods which wrap calls to a logger
object.

Another (more advanced) method is to create a custom Logger class. It
uses the call stack to determine if it's caller has a "ctx" attribute,
and pushes the value of that attribute into the message string. Then
you call logging.setLoggerClass so that you get instances of your
custom logger class.


From iamsidd at gmail.com  Sun Sep 16 15:11:48 2007
From: iamsidd at gmail.com (Sidd)
Date: Sun, 16 Sep 2007 19:11:48 -0000
Subject: Probstat Combination Objects and Persistence
In-Reply-To: <1189954886.324005.325240@22g2000hsm.googlegroups.com>
References: <1189954886.324005.325240@22g2000hsm.googlegroups.com>
Message-ID: <1189969908.477201.137360@w3g2000hsg.googlegroups.com>

On Sep 16, 8:01 am, dohertywa <dohert... at gmail.com> wrote:
> Hi:
>
> I'm working with probstat module which does an excellent job for the
> project I'm working on.
>
> I am passing the Combination objects I generate to generator functions
> that allow me to scale down the results.
>
> I am trying to find a way however to store the end resultant
> Combination object.  Try to pickle it, and Python segfaults.
>
> I want to be able to store the Combination object at any point so I
> may operate on it later without having to repeat previous work.
>
> Any suggestions?
>
> TVKIA,
> Adam

You might want to take a look at this tutorial:http://www.ibm.com/
developerworks/library/l-pypers.html



From paul at boddie.org.uk  Wed Sep 19 18:41:51 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Wed, 19 Sep 2007 15:41:51 -0700
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
In-Reply-To: <1190164166.378500.155990@o80g2000hse.googlegroups.com>
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<dea92f560709021735l2c72d53ew94410fcb33b9b50b@mail.gmail.com>
	<mailman.303.1188779927.28954.python-list@python.org>
	<1190164166.378500.155990@o80g2000hse.googlegroups.com>
Message-ID: <1190241711.344058.238380@57g2000hsv.googlegroups.com>

On 19 Sep, 03:09, TheFlyingDutchman <zzbba... at aol.com> wrote:
>
> How much faster/slower would Greg Stein's code be on today's
> processors versus CPython running on the processors of the late
> 1990's? And if you decide to answer, please add a true/false response
> to this statement - "CPython in the late 1990's ran too slow".

Too slow for what? And what's the fixation with CPython, anyway? Other
implementations of Python 2.x don't have the GIL. Contrary to popular
folklore, Jython has been quite a reasonable implementation of Python
for about half as long as CPython has been around, if you don't mind
the JVM. I'm sure people have lots of complaints about Jython like
they do about CPython and the GIL, thinking that complaining about it
is going to make the situation better, or that they're imparting some
kind of "wisdom" to which the people who actually wrote the code must
be oblivious, but nobody is withholding the code from anyone who wants
to actually improve it.

And there we learn something: that plenty of people are willing to
prod others into providing them with something that will make their
lives better, their jobs easier, and their profits greater, but not so
many are interested in contributing back to the cause and taking on
very much of the work themselves. Anyway, the response to your
statement is "false". Now you'll have to provide us with the insight
we're all missing. Don't disappoint!

Paul



From onurays23 at gmail.com  Sat Sep  1 20:35:28 2007
From: onurays23 at gmail.com (onurays)
Date: Sun, 2 Sep 2007 03:35:28 +0300
Subject: A big problem with _name_ ==  '_main_'
Message-ID: <fbd0g8$e3c$1@aioe.org>

Hi,

I have begun to teach me Python today. The problem is :

    NameError: name 'name' is not defined.

I am using winXP and i used that:

    if  _name_ == '_main_' :
        MyClass()
        gtk.main()

Onuray. 




From keherma at comcast.net  Thu Sep  6 01:24:36 2007
From: keherma at comcast.net (keith)
Date: Thu, 06 Sep 2007 01:24:36 -0400
Subject: Let's Unite Against Jews and Mongrels!
In-Reply-To: <1188849476.067121.119110@r34g2000hsd.googlegroups.com>
References: <1188198797.772672.60840@r29g2000hsg.googlegroups.com>
	<1188300284.507909.126770@57g2000hsv.googlegroups.com>
	<46D40BFE.2020301@comcast.net>
	<1188744204.822322.198360@57g2000hsv.googlegroups.com>
	<46DAD433.1030503@comcast.net>
	<1188849476.067121.119110@r34g2000hsd.googlegroups.com>
Message-ID: <q-Cdnd7WbsKDEkLbnZ2dnUVZ_ridnZ2d@comcast.com>

devondejohn at comcast.net wrote:

> 
> HEY! NOBODY BASHES THE TOOTH FAIRY!
> 

they can, only if they had their penis enlarged 3 inches within the last 
six months..

:P



From jcd at sdf.lonestar.org  Thu Sep 20 23:14:04 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Thu, 20 Sep 2007 23:14:04 -0400
Subject: UTF-8 characters in doctest
In-Reply-To: <46F334D1.20909@sdf.lonestar.org>
References: <1190202459.229197.297350@n39g2000hsh.googlegroups.com>	<fcr3u9$l32$03$2@news.t-online.com>	<878x71jfwo.fsf@pobox.com>
	<46F334D1.20909@sdf.lonestar.org>
Message-ID: <46F336FC.3070806@sdf.lonestar.org>

J. Cliff Dyer wrote:
> John J. Lee wrote:
>   
>> Peter Otten <__peter__ at web.de> writes:
>> [...]
>>   
>>     
>>> def f(s):
>>>     return (s,)
>>>     
>>>       
>> Forgive me if this is a stupid question, but: What purpose does
>> function f serve?
>>
>>
>> John
>>   
>>     
>
> Well, it has nothing to do with the unicode bit that came before it.  It
> just takes an argument, and wraps it in a 1-tuple.  Guessing by the
> argument of "s", that argument is expected to be a string.
>
> One use I can think of is that sometimes you'll find a function that
> returns a string or a list or tuple of strings. If you want to pass that
> result on to a for loop, and only loop once on the string (instead of
> looping on each letter of the string), you might want to wrap it in a
> tuple or a list before passing it to the loop.
>
> Cheers,
> Cliff
(replying to my own post)

Sorry.  Itchy trigger finger and tired brain.  I didn't read the whole
context of the thread.  Dunno what it's doing here.  Forcing __repr__ to
be called on a print statement?  Funny way to do that.  Like I said, I
don't know, so I'll leave it to someone else to say.

Cheers,
Cliff


From iclark at mail.ewu.edu  Thu Sep  6 14:50:49 2007
From: iclark at mail.ewu.edu (Ian Clark)
Date: Thu, 06 Sep 2007 11:50:49 -0700
Subject: Beginners Query - Simple counter problem
In-Reply-To: <1189104274.3376.32.camel@dot.uniqsys.com>
References: <WZidnbvgAJstpX3bRVnytgA@bt.com>	<13e0g0id9rlmg71@corp.supernews.com>	<1189102450.3376.17.camel@dot.uniqsys.com>
	<fbpgl2$qls$1@sea.gmane.org>
	<1189104274.3376.32.camel@dot.uniqsys.com>
Message-ID: <fbpi69$lk$1@sea.gmane.org>

Carsten Haese wrote:
> On Thu, 2007-09-06 at 11:24 -0700, Ian Clark wrote:
>> Carsten Haese wrote: 
>>> def d6(count):
>>>     return sum(random.randint(1, 6) for die in range(count))
>>>
>> My stab at it:
>>
>>      >>> def roll(times=1, sides=6):
>>      ...     return random.randint(times, times*sides)
> 
> That produces an entirely different probability distribution if times>1.
> Consider times=2, sides=6. Your example will produce every number
> between 2 and 12 uniformly with the same probability, 1 in 11. When
> rolling two six-sided dice, the results are not evenly distributed. E.g.
> the probability of getting a 2 is only 1 in 36, but the probability of
> getting a 7 is 1 in 6.
> 

Doh. I stand corrected. Probability was never a fun subject for me. :)

Ian



From mclausch at gmail.com  Fri Sep  7 17:46:26 2007
From: mclausch at gmail.com (Matthew Lausch)
Date: Fri, 07 Sep 2007 14:46:26 -0700
Subject: Subprocess module and unicode input
Message-ID: <1189201586.423477.28200@g4g2000hsf.googlegroups.com>

I'd like to use the subprocess module with upper level characters in
the process name or in the arguments to the process. Something like
this:

cmd = [ u'test_\u65e5\u672c\u8a9e_exec.bat', u'arg1', u'arg2' ]
subprocess.call(cmd)

But this gives the error:

UnicodeEncodeError: 'ascii' codec can't encode characters in position
5-7: ordinal not in range(128)

Is there a way around this problem? I don't want to assume any
particular set of characters. The example above uses Japanese
characters, but I would like to support anything.

Thanks.



From ladaan at iptel.org  Thu Sep 27 02:46:56 2007
From: ladaan at iptel.org (Ladislav Andel)
Date: Thu, 27 Sep 2007 08:46:56 +0200
Subject: ~ bit-wise unary operator
In-Reply-To: <pan.2007.09.27.00.24.14.417054@vscht.cz>
References: <mailman.1138.1190844872.2658.python-list@python.org>
	<pan.2007.09.27.00.24.14.417054@vscht.cz>
Message-ID: <46FB51E0.6010400@iptel.org>

Wow, so many answers :). Thank you, guys :).

Lada

Michal Bozon wrote:
> cau,
> maybe int is represented internally as a signed integer
>
> you can use numpy types:
>
>   
>>>> import numpy
>>>> ~ numpy.uint16(7978)
>>>>         
> 57557
>
>  -m.
>
>
> On Thu, 27 Sep 2007 00:14:49 +0200, Ladislav Andel wrote:
>
>   
>> Hello,
>> why ~ bit-wise unary operator returns -(x+1) and not bit inversion of 
>> the given integer?
>>
>> example:
>> a = 7978
>> a = ~a
>> python returns -7979
>>
>> but I need to get back 57557 as in C language.
>>
>> which is also in binary
>> 0001111100101010
>> and inverted
>> 1110000011010101
>>
>> Is here any other operator or do I have to write it on my own?
>>
>> Thank you,
>> Lada
>>     
>
>   



From bj_666 at gmx.net  Fri Sep  7 14:30:36 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 7 Sep 2007 18:30:36 GMT
Subject: How to determine the bool between the strings and ints?
References: <mailman.227.1189179649.2658.python-list@python.org>
	<1189182688.290480.102350@o80g2000hse.googlegroups.com>
	<mailman.232.1189183755.2658.python-list@python.org>
Message-ID: <5kdjmcF31i6hU7@mid.uni-berlin.de>

On Fri, 07 Sep 2007 18:49:12 +0200, Jorgen Bodde wrote:

> As for why caring if they are bools or not, I write True and False to
> the properties, the internal mechanism works like this so I need to
> make that distinction.

Really?  Can't you just apply the `int()` function?

In [52]: map(int, [1, 0, True, False])
Out[52]: [1, 0, 1, 0]

Ciao,
	Marc 'BlackJack' Rintsch


From gagsl-py2 at yahoo.com.ar  Mon Sep  3 20:43:29 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 03 Sep 2007 21:43:29 -0300
Subject: metaclasses: timestamping instances
References: <f4cc03640709010706x352f097wdfe9e7fc3612580b@mail.gmail.com>
	<mailman.277.1188662918.28954.python-list@python.org>
	<1188665051.107414.61200@50g2000hsm.googlegroups.com>
	<f4cc03640709030339h7f1041a4p6e11239399a84755@mail.gmail.com>
Message-ID: <op.tx3tmrinx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 03 Sep 2007 07:39:05 -0300, km <srikrishnamohan at gmail.com>  
escribi?:

> But why does it show  varied difference in the time  between a and b
> instance creations when __metaclass__ hook is used and when not used in
> class Y ? I dont understand that point !

What do you expect from a._created, b._created, and its difference?
You reset Meta.start each time - so _created measures the time between  
creation of two consecutive instances (minus a small delay because of the  
*two* calls to time.time())
And obviously the elapsed time until the second instance is created is  
larger, due to the intervening print statement.

-- 
Gabriel Genellina



From mark at qtrac.eu  Tue Sep 25 06:40:53 2007
From: mark at qtrac.eu (Mark Summerfield)
Date: Tue, 25 Sep 2007 11:40:53 +0100
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <59e9fd3a0709250313v76a7626dn69908b39e4ba100b@mail.gmail.com>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<59e9fd3a0709250313v76a7626dn69908b39e4ba100b@mail.gmail.com>
Message-ID: <200709251140.53098.mark@qtrac.eu>

On 2007-09-25, Andrew Durdin wrote:
> On 9/25/07, Mark Summerfield <m.n.summerfield at googlemail.com> wrote:
> >     Since the sorteddict's data is always kept in key order, indexes
> >     (integer offsets) into the sorteddict make sense.  Five additional
> >     methods are proposed to take advantage of this:
> >
> >     key(index : int) -> value
> >
> >     item(index : int) -> (key, value)
> >
> >     value(index : int) -> key
> >
> >     set_value(index : int, value)
> >
> >     delete(index : int)
>
> But what about using non-sequential integer keys (something I do quite
> often)?
>
> e.g. sorteddict({1:'a', 3:'b': 5:'c', 99:'d'})[3]  should return 'b', not
> 'd'.
>
> Andrew

Hmmm, managed to confuse myself with 'b' and 'd'!

d = sorteddict({1:"one", 3:"three", 5:"five", 99:"ninetynine"})

d.items()

[(1, 'one'), (3, 'three'), (5, 'five'), (99, 'ninetynine')]

d[3], d.value(3)

('three', 'ninetynine')

So using [] returns the value for the given key and using value()
returns the value for the given index position.

-- 
Mark Summerfield, Qtrac Ltd., www.qtrac.eu



From erik at myemma.com  Thu Sep 27 13:43:38 2007
From: erik at myemma.com (Erik Jones)
Date: Thu, 27 Sep 2007 12:43:38 -0500
Subject: True of False
In-Reply-To: <EE500D79-5D26-4543-A1CB-A82B3799D8BD@myemma.com>
References: <1190910814.594559.30880@n39g2000hsh.googlegroups.com>
	<5m254hFatlbuU2@mid.uni-berlin.de>
	<EE500D79-5D26-4543-A1CB-A82B3799D8BD@myemma.com>
Message-ID: <D7B1C652-BC67-460F-830D-AB0D250EA6DE@myemma.com>


On Sep 27, 2007, at 12:29 PM, Erik Jones wrote:

>
> On Sep 27, 2007, at 11:47 AM, Marc 'BlackJack' Rintsch wrote:
>
>> On Thu, 27 Sep 2007 09:33:34 -0700, koutoo wrote:
>>
>>> I tried writing a true and false If statement and didn't get
>>> anything?  I read some previous posts, but I must be missing
>>> something.  I just tried something easy:
>>>
>>> a = ["a", "b", "c", "d", "e", "f"]
>>>
>>> if "c" in a == True:
>>>      Print "Yes"
>>>
>>> When I run this, it runs, but nothing prints.  What am I doing  
>>> wrong?
>>
>> Wow that's odd:
>>
>> In [265]: a = list('abcdef')
>>
>> In [266]: a
>> Out[266]: ['a', 'b', 'c', 'd', 'e', 'f']
>>
>> In [267]: 'c' in a
>> Out[267]: True
>>
>> In [268]: 'c' in a == True
>> Out[268]: False
>>
>> In [269]: ('c' in a) == True
>> Out[269]: True
>>
>> In [270]: 'c' in (a == True)
>> --------------------------------------------------------------------- 
>> -
>> -----
>> <type 'exceptions.TypeError'>             Traceback (most recent
>> call last)
>>
>> /home/bj/<ipython console> in <module>()
>>
>> <type 'exceptions.TypeError'>: argument of type 'bool' is not  
>> iterable
>>
>>
>> What's going on there?
>
> That is weird.  Given 270, what's happening in 268.
>
> Erik Jones

Cool, Richard Thomas answered this one for me.

Erik Jones

Software Developer | Emma?
erik at myemma.com
800.595.4401 or 615.292.5888
615.292.0777 (fax)

Emma helps organizations everywhere communicate & market in style.
Visit us online at http://www.myemma.com




From arnodel at googlemail.com  Sat Sep  1 14:43:03 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sat, 01 Sep 2007 11:43:03 -0700
Subject: datetime.timedelta division confusion
In-Reply-To: <mailman.279.1188671323.28954.python-list@python.org>
References: <mailman.279.1188671323.28954.python-list@python.org>
Message-ID: <1188672183.410842.27070@r29g2000hsg.googlegroups.com>

On Sep 1, 7:28 pm, s... at pobox.com wrote:
> Running from Subversion, I see confusing (to me) behavior related to
> division of datetime.timedelta objects by integers:
>
>     % python
>     Python 2.6a0 (trunk:57277:57280M, Aug 28 2007, 17:44:49)
>     [GCC 4.0.1 (Apple Computer, Inc. build 5367)] on darwin
>     Type "help", "copyright", "credits" or "license" for more information.
>     >>> import datetime
>     >>> d = datetime.timedelta(1)
>     >>> d / 2
>     Traceback (most recent call last):
>       File "<stdin>", line 1, in <module>
>     TypeError: unsupported operand type(s) for /: 'datetime.timedelta' and 'int'
>     >>> d.__div__(2)
>     datetime.timedelta(0, 43200)
>
> When I run the interpreter under gdb's control with a breakpoint set in
> delta_divide, the breakpoint is not reached in the first case, but it is in
> the second.  Is there something amiss with division of timedelta objects by
> ints or am I just missing something?
>
> Skip

Try d // 2 ?
It may be that v2.6 considers / as __truediv__ and not __div__.

I can reproduce this behaviour on 2.4:

daffodil:~ arno$ python2.4
Python 2.4.3 (#1, Oct 20 2006, 12:58:47)
[GCC 4.0.1 (Apple Computer, Inc. build 5247)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from __future__ import division
>>> import datetime
>>> d = datetime.timedelta(1)
>>> d/2
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: unsupported operand type(s) for /: 'datetime.timedelta' and
'int'
>>> d // 2
datetime.timedelta(0, 43200)
>>>

HTH

--
Arnaud




From perl4hire at softouch.on.ca  Wed Sep 12 21:05:44 2007
From: perl4hire at softouch.on.ca (Amer Neely)
Date: Wed, 12 Sep 2007 21:05:44 -0400
Subject: Coming from Perl
In-Reply-To: <1189644803.816375.269950@y42g2000hsy.googlegroups.com>
References: <Cv%Fi.198$372.59@read2.cgocable.net>
	<1189644803.816375.269950@y42g2000hsy.googlegroups.com>
Message-ID: <g00Gi.205$372.23@read2.cgocable.net>

TheFlyingDutchman wrote:
> On Sep 12, 5:30 pm, Amer Neely <perl4h... at softouch.on.ca> wrote:
>> I'm a complete newbie with Python, but have several years experience
>> with Perl in a web environment.
>>
>> A question I have, if someone here is familiar with Perl, does Python
>> have something like Perl's 'here document'? I've just searched and read
>> some postings on generating HTML but they all seem to refer to various
>> template utilities. Is this the only way, or am I missing something? I'm
>> used to generating X/HTML by hand, which makes the here document in Perl
>> ideal for me. Also, many times a client already existing HTML code that
>> I can use in a script.
>>
>> --
>> Amer Neely
>> w:www.webmechanic.softouch.on.ca/
>> Perl | MySQL programming for all data entry forms.
>> "Others make web sites. We make web sites work!"
> 
> I am not sure if this is what you are looking for, but Python has a
> special string with 3 quotes that I believe duplicates part of the
> functionality of a here document:
> 
> myHmtlHeader = """
> <head attribute = "abc">
> <title>My Page</title>
> </head>
> """
> 
> print myHtmlHeader
> 
> 
> outputs:
> 
> 
> <head attribute="abc">
> <title>My Page</title>
> </head>
> 

Yep, I think that is the way I will have to go. Thanks.

-- 
Amer Neely
w: www.webmechanic.softouch.on.ca/
Perl | MySQL programming for all data entry forms.
"Others make web sites. We make web sites work!"


From tuomas.vesterinen at pp.inet.fi  Tue Sep  4 21:18:05 2007
From: tuomas.vesterinen at pp.inet.fi (Tuomas)
Date: Wed, 05 Sep 2007 01:18:05 GMT
Subject: Undeterministic strxfrm?
In-Reply-To: <fbkhdb$epk$00$1@news.t-online.com>
References: <ixaDi.63$327.50@read3.inet.fi>	<mailman.37.1188933223.2658.python-list@python.org>	<lKiDi.237$327.182@read3.inet.fi>
	<fbkhdb$epk$00$1@news.t-online.com>
Message-ID: <htnDi.259$327.117@read3.inet.fi>

Peter Otten wrote:
> Python seems to be the culprit as there is a relatively recent
> strxfrm-related bugfix, see

Thanks Peter. Can't find it, do you have the issue number?

> http://svn.python.org/view/python/trunk/Modules/_localemodule.c?rev=54669
> 
> If I understand it correctly the error makes it likely that the resulting
> string has trailing garbage characters.

Reading the rev 54669 it seems to me, that the bug is not fixed. Man says:

STRXFRM(3): ... size_t strxfrm(char *dest, const char *src, size_t n);
... The first n characters of  the  transformed  string
are  placed in dest.  The transformation is based on the program?s 
current locale for category LC_COLLATE.
... The strxfrm() function returns the number of bytes required to 
store  the transformed  string  in dest excluding the terminating ?\0? 
character.  If the value returned is n or more, the contents of dest are 
*indeterminate*.

Accordin the man pages Python should know the size of the result it 
expects and don't trust the size strxfrm returns. I don't completely 
understand the collate algorithm, but it should offer different levels 
of collate. So Python too, should offer those levels as a second 
parameter. Hovever strxfrm don't offer more parameters either except 
there is another function strcasecmp. So Python should be able to 
calculate the expected size before calling strxfrm or strcasecmp. I 
don't how it is possible. May be strcoll knows better and I should kick 
strxfrm off and take strcoll instead. It costs converting the seach key 
in every step of the search.

Tuomas

> Peter


From rustompmody at gmail.com  Sun Sep 16 05:09:58 2007
From: rustompmody at gmail.com (Rustom Mody)
Date: Sun, 16 Sep 2007 14:39:58 +0530
Subject: generating list of sub lists
In-Reply-To: <1189931217.415065.102820@w3g2000hsg.googlegroups.com>
References: <1189931217.415065.102820@w3g2000hsg.googlegroups.com>
Message-ID: <f46c52560709160209w27943ee1o206a198263db42ae@mail.gmail.com>

On 9/16/07, cesco <fd.calabrese at gmail.com> wrote:
> Hi,
>
> is there a one-liner to accomplish the following task?
> >From the list
> l = ['string1', 'string2', 'string3']
> generate the list of lists
> l = [['string1'], ['string1', 'string2'], ['string1', 'string2',
> 'string3']]
>
> Any help would be appreciated.
>
> Thanks
> Francesco
>>> l = [1,2,3,4,5]

>>> [l[:i]  for i in range(len(l))]
[[], [1], [1, 2], [1, 2, 3], [1, 2, 3, 4]]
>>>
well almost works except for the first empty list. [Are you sure you
dont want it?]

Corrected

>>> [l[:i+1] for i in range(len(l)-1)]
[[1], [1, 2], [1, 2, 3], [1, 2, 3, 4]]

Though I wonder if there is as neat a way as the first?


From ruoyu0088 at gmail.com  Wed Sep 26 02:29:09 2007
From: ruoyu0088 at gmail.com (HYRY)
Date: Tue, 25 Sep 2007 23:29:09 -0700
Subject: the address of list.append and list.append.__doc__
In-Reply-To: <mailman.1083.1190785973.2658.python-list@python.org>
References: <1190775258.351819.24930@22g2000hsm.googlegroups.com>
	<mailman.1077.1190776788.2658.python-list@python.org>
	<1190780557.879816.13800@d55g2000hsg.googlegroups.com>
	<mailman.1083.1190785973.2658.python-list@python.org>
Message-ID: <1190788149.477809.80130@g4g2000hsf.googlegroups.com>

> "the problem"?
> Perhaps if you explain what you really want to do, someone can think the
> way to do that, most likely *not* using id()

Thanks, now I know I cannot use id() for my problem.

Here is my problem:

I want to add a docstring translator into the Python interpreter. If
the user input:
>>> a = [1,2,3]
>>> a.append(
this translator will show the docstring of append in my native
language. Because __doc__ is read only, I added a dict to the
interpreter as follows:

DOC[list.append.__doc__] = """ translated version of the __doc__ """

When it is the time to show docstring, the program get the translated
version from DOC.
This works, but I think the key of DOC is too long, so I want to use
the id of list.append.__doc__ as the key; or use the id of
list.append:

DOC[id(list.append.__doc__)] = "..."
DOC[id(list.append)] = "..."

So, I asked how to get list.append from a.append, and why
id(list.append.__doc__) changes.



From hniksic at xemacs.org  Wed Sep 26 06:27:01 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Wed, 26 Sep 2007 12:27:01 +0200
Subject: sorteddict PEP proposal [started off as orderedict]
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>
	<1190753722.026806.254530@d55g2000hsg.googlegroups.com>
	<1190756003.292096.71130@o80g2000hse.googlegroups.com>
	<1190789981.385466.37870@57g2000hsv.googlegroups.com>
	<Xns99B760A3F5859duncanbooth@127.0.0.1>
	<87sl51lshd.fsf@mulj.homelinux.net>
	<1190799759.367001.106400@r29g2000hsg.googlegroups.com>
Message-ID: <87fy11lo22.fsf@mulj.homelinux.net>

Mark Summerfield <m.n.summerfield at googlemail.com> writes:

> On 26 Sep, 09:51, Hrvoje Niksic <hnik... at xemacs.org> wrote:
>> Duncan Booth <duncan.bo... at invalid.invalid> writes:
>> > I that's the point though: you can't write one implementation
>> > that has good performance for all patterns of use
>>
>> An implementation of sorted dict using a balanced tree as the
>> underlying data structure would give decent performance in all the
>> mentioned use cases.  For example, red-black trees search, insert, and
>> delete in O(log n) time.
>
> Basically, as implemented, I have to invalidate if there is any
> change [...]

No argument here, as long as the limitation is understood to be a
consequence of the current implementation model.  Seriously proposing
a sorteddict that is a mere syntactic sugar over dict dooms the PEP to
rejection.

Major programming language libraries have included sorted mapping and
set types for a while now, making the performance and complexity
constraints generally well understood.  We should make use of that
knowledge when designing sorteddict.


From fakeaddress at nowhere.org  Sun Sep  9 20:08:28 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Mon, 10 Sep 2007 00:08:28 GMT
Subject: Modul (%) in python not like in C?
In-Reply-To: <mailman.296.1189366862.2658.python-list@python.org>
References: <880dece00709091201n449d4c2k31998a5d426de17d@mail.gmail.com>	<46E4466C.2030303@sdf.lonestar.org>
	<mailman.296.1189366862.2658.python-list@python.org>
Message-ID: <0W%Ei.14427$3x.11615@newssvr25.news.prodigy.net>

Arnau Sanchez wrote:
>> Dotan Cohen wrote:

>>> Second, in Turbo C -111%10=-1 however in python -111%10=9. Is one or
>>> the other in error? Is this a known gotcha? I tried to google the
>>> subject however one cannot google the symbol %. Thanks in advance.
[...]
> In fact, what you get in C depends on the compiler and architecture, 

Not according to the C standard:

     When integers are divided, the result of the / operator is
     the algebraic quotient with any fractional part discarded.(87)
     If the quotient a/b is representable, the expression
     (a/b)*b + a%b shall equal a.
     [...]
     87) This is often called ??truncation toward zero??.

     [International Standard ISO/IEC 9899:1999, Section 6.5.5
     Multiplicative operators, Paragraph 6 and footnote 87]


> while Python is always consistent and returns positive remainders.

Technically:

     The modulo operator always yields a result with the same sign
     as its second operand (or zero)

     [http://docs.python.org/ref/binary.html]


-- 
--Bryan


From ldo at geek-central.gen.new_zealand  Mon Sep 24 22:52:39 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Tue, 25 Sep 2007 14:52:39 +1200
Subject: shutil.copy2 error
References: <1190644477.380312.261840@d55g2000hsg.googlegroups.com>
	<1190673284.509807.110830@57g2000hsv.googlegroups.com>
	<1190681351.841370.100150@19g2000hsx.googlegroups.com>
Message-ID: <fd9t5n$t7q$2@lust.ihug.co.nz>

In message <1190681351.841370.100150 at 19g2000hsx.googlegroups.com>, Horse
wrote:

> I should've mentioned earlier, but this is
> running on a windows 2000 system, and the destination folder is a
> samba share on a Linux server.

Could it be the connection to the Samba server has gone down temporarily?


From gagsl-py2 at yahoo.com.ar  Sat Sep 29 02:04:09 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 29 Sep 2007 03:04:09 -0300
Subject: Bug: spurious indentation error
References: <33dffc910709282143y76151e66r2f8641ed2972661a@mail.gmail.com>
Message-ID: <op.tzei47apx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sat, 29 Sep 2007 01:43:53 -0300, Mridula Ramesh  
<mridula.ccpl at gmail.com> escribi?:

> Lol, nope, I checked today too, and it happened again. Try running this  
> as a
> script, not from the prompt -

I got a SyntaxError on line 10 as expected.
After correcting it, I got an `IndentationError: expected an indented  
block` on line 23, due to a long line being wrapped onto the next line.

A syntax error may be reported some lines later than the actual mistake,  
if the following lines build a good construct. For example, a missing  
close parenthesis.

-- 
Gabriel Genellina



From kostaspaxos at yahoo.gr  Sat Sep 22 05:37:01 2007
From: kostaspaxos at yahoo.gr (Konstantinos Pachopoulos)
Date: Sat, 22 Sep 2007 12:37:01 +0300
Subject: find difference in days from YYYYMMDD to YYYYMMDD
Message-ID: <46F4E23D.7050600@yahoo.gr>

Hi,
does any body now any such algorith? to find difference in days from 
YYYYMMDD to YYYYMMDD?
Or just an algorithm, that converts YYYYMMDD to seconds since the epoch?

Thanks


From trekker182 at comcast.net  Thu Sep 27 13:50:49 2007
From: trekker182 at comcast.net (Shawn Minisall)
Date: Thu, 27 Sep 2007 13:50:49 -0400
Subject: ValueError: too many values to unpack,>>>
In-Reply-To: <5m24sfFatlbuU1@mid.uni-berlin.de>
References: <mailman.1169.1190911027.2658.python-list@python.org>
	<5m24sfFatlbuU1@mid.uni-berlin.de>
Message-ID: <46FBED79.6070207@comcast.net>

Marc 'BlackJack' Rintsch wrote:
> On Thu, 27 Sep 2007 12:36:58 -0400, Shawn Minisall wrote:
>
>   
>> With the multiple value lines, python says this "ValueError: too many 
>> values to unpack"
>>
>> I've googled it and it says that happens when you have too few or too 
>> many strings that don't match with the variables in number your trying 
>> to assign them too.  Below are the lines in reading in:
>>
>> line 3 - 19.18    29.15    78.75    212.10
>> line 4 - 100    20    410.29   
>>
>> And this is the code I'm using:
>>
>>     #read withdrawls from file on line3
>>     line = infile.readline()
>>    
>>     #split withdrawls up
>>     withdraw1, withdraw2, withdraw3, withdraw4 = string.split(line, "\t")
>>
>>     #read deposits from file on line4
>>     line = infile.readline()
>>     #split deposits up
>>     deposit1, deposit2, deposit3 = string.split(line, "\t")
>>
>> I have 4 strings to match line 3 and 3 to match the 3 on line 4...any 
>> thoughts?
>>     
>
> First thought is to find out which of the two lines triggers the
> exception.  This information is part of the full traceback.
>
> Ciao,
> 	Marc 'BlackJack' Rintsch
>   

Sorry, it looks like it's on the fourth line with the 3 values on line 
4...its reading line 3 fine

Traceback (most recent call last):
  File "<pyshell#0>", line 1, in <module>
    main()
  File "I:\COMPUTER PROGRAMMING CLASS\PROJECT #1\project1.py", line 33, 
in main
    deposit1, deposit2, deposit3 = string.split(line, "\t")
ValueError: too many values to unpack



From mrkafk at gmail.com  Sun Sep 30 15:07:15 2007
From: mrkafk at gmail.com (mrkafk at gmail.com)
Date: Sun, 30 Sep 2007 12:07:15 -0700
Subject: s.split() on multiple separators
In-Reply-To: <mailman.1309.1191171558.2658.python-list@python.org>
References: <1191160394.870241.171200@w3g2000hsg.googlegroups.com>
	<mailman.1309.1191171558.2658.python-list@python.org>
Message-ID: <1191179235.520749.310670@o80g2000hse.googlegroups.com>


> > ['ab', 'd', '', 'ab', '', '']
>
> Given your original string, I'm not sure how that would be the
> expected result of "split c on the characters in dels".

Oops, the inner loop should be:

for i in xrange(0,len(c)):

Now it works.


>   >>> c=' abcde abc cba fdsa bcd '
>   >>> import re
>   >>> r = re.compile('[ce ]')
>   >>> r.split(c)
>   ['', 'ab', 'd', '', 'ab', '', '', 'ba', 'fdsa', 'b', 'd', '']
>
> given that a regexp object has a split() method.

That's probably optimum solution. Thanks!

Regards,
Marcin



From knipknap at gmail.com  Mon Sep  3 16:38:36 2007
From: knipknap at gmail.com (Samuel)
Date: Mon, 03 Sep 2007 13:38:36 -0700
Subject: Python object <-> XML
In-Reply-To: <fbhqav$b2r$1@atlantis.news.tpi.pl>
References: <1188849714.128121.139450@r34g2000hsd.googlegroups.com>
	<fbhqav$b2r$1@atlantis.news.tpi.pl>
Message-ID: <1188851916.641275.133990@22g2000hsm.googlegroups.com>

On Sep 3, 10:19 pm, Jarek Zgoda <jzg... at o2.usun.pl> wrote:
> > Is there an easy way (i.e. without writing a sax/dom parser) to load
> > this into a (number of) Python object(s), manipulate the instance, and
> > save the result back to XML?
>
> Yea, use ElementTree and you'd get a bunch of nested lists of very
> simple objects.

Sorry for being unclear. By "load this into a number of Python
objects" I mean, filling already existing objects with data. In other
words:

class Item(object):
  def __init__(self, ref, name):
    self.ref  = ref
    self.name = name

class Group(object):
  def __init__(self, ref, name, item = []):
    self.ref  = ref
    self.name = name
    self.item = item

mapper = Mapper()
objects = mapper.load('data.xml')
print objects['1']
<Item object at 0x324235a>

(Obviously, in my example the mapper could not always know where a
list is required, but an existing mapper will surely have a solution
implemented.)
I guess what I am looking for is pretty much an ORM that also works
with XML.

-Samuel



From x_john at timney.eclipse.co.uk  Thu Sep 13 14:13:25 2007
From: x_john at timney.eclipse.co.uk (John Timney (MVP))
Date: Thu, 13 Sep 2007 19:13:25 +0100
Subject: Car-ac-systems
References: <1189511932.371621.112970@o80g2000hse.googlegroups.com>
	<BeqdnaFrktIgBHvbnZ2dnUVZ8v-dnZ2d@eclipse.net.uk>
	<1189661753.315182.53630@22g2000hsm.googlegroups.com>
Message-ID: <Za6dnU1QmqNRGXTbnZ2dnUVZ8vudnZ2d@eclipse.net.uk>

ho ho......now thats quite funny!

Regards

John Timney (MVP)
http://www.johntimney.com
http://www.johntimney.com/blog


<nebulous99 at gmail.com> wrote in message 
news:1189661753.315182.53630 at 22g2000hsm.googlegroups.com...
> On Sep 11, 9:35 am, "John Timney \(MVP\)"
> <x_j... at timney.eclipse.co.uk> wrote:
>> How do I control one with C# then!  Thats not on your site, clearly not
>> everything I need to know then.  Waste of a site!
>
> C# is just as off topic in comp.lang.java.programmer as car air-
> conditioning systems. The latter, however, have the redeeming
> characteristic that they are not the demonic spawn of evil Microsoft.
> 




From mccredie at gmail.com  Tue Sep 18 15:22:40 2007
From: mccredie at gmail.com (Matt McCredie)
Date: Tue, 18 Sep 2007 12:22:40 -0700
Subject: Using python to create windows apps that everyone can use?
In-Reply-To: <7C008A37566.00000D2Atomharding@inbox.com>
References: <7C008A37566.00000D2Atomharding@inbox.com>
Message-ID: <9e95df10709181222h31b180faj56d050b8adaea7f1@mail.gmail.com>

On 9/18/07, Thomas Harding <tomharding at inbox.com> wrote:
> Hi guys, sorry to post another topic on this, as I am aware that it has
> already been posted a few times, but not with specifically what I am looking
> for. I want an app that makes a gui interface for python (similar to
> Microsoft visual studio or qt designer, not a code based one) and/or an app
> that can make this into a .exe that can be opened by any person on any
> computer without python installed.

check out py2exe: http://py2exe.org

matt


From paul.nospam at rudin.co.uk  Wed Sep  5 06:35:05 2007
From: paul.nospam at rudin.co.uk (Paul Rudin)
Date: Wed, 05 Sep 2007 11:35:05 +0100
Subject: creating really big lists
References: <1188985838.661821.41530@k79g2000hse.googlegroups.com>
	<87ejhd2zzt.fsf@rudin.co.uk> <5k7eacF2g23sU2@mid.uni-berlin.de>
Message-ID: <874pi92yee.fsf@rudin.co.uk>

"Diez B. Roggisch" <deets at nospam.web.de> writes:

> Paul Rudin wrote:
>
>> Dr Mephesto <dnhkng at googlemail.com> writes:
>> 
>>> Hi!
>>>
>>> I would like to create a pretty big list of lists; a list 3,000,000
>>> long, each entry containing 5 empty lists. My application will append
>>> data each of the 5 sublists, so they will be of varying lengths (so no
>>> arrays!).
>>>
>>> Does anyone know the most efficient way to do this? I have tried:
>>>
>>> list = [[[],[],[],[],[]] for _ in xrange(3000000)]
>>>
>>> but its not soooo fast. Is there a way to do this without looping?
>> 
>> You can do:
>> 
>>    [[[],[],[],[],[]]] * 3000000
>> 
>> although I don't know if it performs any better than what you already
>> have.
>
> You are aware that this is hugely different, because the nested lists are
> references, not new instances? Thus the outcome is most probably (given the
> gazillion of times people stumbled over this) not the desired one...

Err, yes sorry. I should try to avoid posting before having coffee in
the mornings.


From steve at REMOVE-THIS-cybersource.com.au  Sat Sep 22 19:50:21 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sat, 22 Sep 2007 23:50:21 -0000
Subject: Getting rid of bitwise operators in Python 3?
References: <46f49740$0$32514$4c368faf@roadrunner.com>
	<miaJi.28220$eY.3184@newssvr13.news.prodigy.net>
	<1190484589.890198.266430@y42g2000hsy.googlegroups.com>
Message-ID: <13fbahtem90fp99@corp.supernews.com>

On Sat, 22 Sep 2007 18:09:49 +0000, richyjsm wrote:

> On that subject, I'd suggest that the pow() builtin (not the ** operator
> - just the pow() function) should also be a candidate for removal...

Help on built-in function pow in module __builtin__:

pow(...)
    pow(x, y[, z]) -> number

    With two arguments, equivalent to x**y.  With three arguments,
    equivalent to (x**y) % z, but may be more efficient (e.g. for longs).


Everybody forgets that pow can take three arguments, except of course for 
those who use that functionality and would be mighty peeved if it went 
away.



-- 
Steven.


From bj_666 at gmx.net  Sat Sep  1 15:57:31 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 1 Sep 2007 19:57:31 GMT
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
	<mailman.281.1188675472.28954.python-list@python.org>
Message-ID: <5jtuhbF16jr4U2@mid.uni-berlin.de>

On Sat, 01 Sep 2007 13:37:29 -0600, Michael L Torrie wrote:

> What's wrong, then, with doing:
> 
> if i in list:
>    print list.index(i)

If `i` is in the list this does the linear lookup twice.

> If we were to program this .index() method in some language that
> enforces contracts, like haskell, then we'd say that .index() expects a
> value that exists in the list.  So if you violate the contract, why
> should you expect to *not* get an exception.  Doing it any other way,
> though, makes the code a lot more error prone.

Does Haskell exceptions?  In Haskell I would expect such a function to
return the `Maybe` type.

Ciao,
	Marc 'BlackJack' Rintsch


From paul.hankin at gmail.com  Tue Sep 25 07:19:24 2007
From: paul.hankin at gmail.com (Paul Hankin)
Date: Tue, 25 Sep 2007 11:19:24 -0000
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
Message-ID: <1190719164.587009.206340@19g2000hsx.googlegroups.com>

Recall sorted...
    sorted(iterable, cmp=None, key=None, reverse=False) --> new sorted
list

So why not construct sorteddicts using the same idea of sortedness?

sorteddict((mapping | sequence | nothing), cmp=None, key=None,
reverse=None)

Then we can specify the exact behaviour of sorteddicts: it's the same
as a regular dict, except when the order of keys is important they're
ordered as if they were sorted by sorted(keys, cmp=sd._cmp,
key=sd._key, reverse=sd._reverse). Here I imagine cmp, key and reverse
are stored in the new sorteddict as attributes _cmp, _key, _reverse -
obviously the actual implementation may differ.

This has the benefit of making sorteddict's behaviour explicit and
easy to understand, and doesn't introduce a new sorting API when we
already have a perfectly decent one.

The only problem here is the **kwargs form of the dict constructor
doesn't translate as we're using keyword args to pass in the sort
criterion. Perhaps someone has an idea of how this can be solved. If
nothing else, this constructor could be dropped for sorteddicts, and
sorteddict(dict(**kwargs), cmp=..., key=..., reverse=...) when that
behaviour is wanted.

I don't like the integral indexing idea or the slicing: indexing and
slicing are already part of python and it's bad to have different
syntax for the same concept on sorteddicts. I'd say it's not an
important enough for sorteddicts anyway.

--
Paul Hankin



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Sep 21 07:34:33 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 21 Sep 2007 13:34:33 +0200
Subject: Odd files; just left behind?
In-Reply-To: <mailman.861.1190373037.2658.python-list@python.org>
References: <mailman.760.1190205969.2658.python-list@python.org>	<878x725ts7.fsf@pobox.com>	<46F191DF.7000908@jessikat.plus.net>	<46f2bd9b$0$20143$426a74cc@news.free.fr>	<mailman.860.1190367290.2658.python-list@python.org>	<46f3a032$0$26141$426a74cc@news.free.fr>
	<mailman.861.1190373037.2658.python-list@python.org>
Message-ID: <46f3ac48$0$13496$426a74cc@news.free.fr>

Robin Becker a ?crit :
> Bruno Desthuilliers wrote:
> ........
>>>  >>>
>>>
>>> it would seem simpler to have the .so files inside the site-packages 
>>> and there's the question of why this folder has to be obfuscated 
>>> (name starts with .). Even if these files are "resources" why should 
>>> they be assumed to belong to the user?
>>
>> Notice that you did install your lib/python in /myhome, not in 
>> /usr[/local]
> 
> yes, so should I then assume that the root installs will put all the .so 
> files in /usr/local/lib/.python-eggs?
> 
> In fact when I look at my root installed pythons they seem quite happy 
> to put the _mysql.so underneath site-packages. I suspect that if I just 
> installed from source I'd get that behaviour, but the egg stuff is 
> different.
> 
>>
>> (snip)
>>> Just another nonsense from the eggworld
>>
>> Or just another example of not reading the FineManual(tm) ?
> 
> well I didn't write the installer or the associated egg setup. The egg 
> things are supposed to do the right thing, but perhaps they're too 
> difficult for the egg layers.

Can't tell. So far, I've had no problem with eggs, so...


From nutsbreaker1 at gmail.com  Tue Sep 11 09:05:22 2007
From: nutsbreaker1 at gmail.com (nutsbreaker1 at gmail.com)
Date: Tue, 11 Sep 2007 13:05:22 -0000
Subject: Go Here to win a free guitar
Message-ID: <1189515922.183328.245430@k79g2000hse.googlegroups.com>

http://freeguitars.blogspot.com/



From kw at codebykevin.com  Thu Sep 27 10:20:15 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Thu, 27 Sep 2007 10:20:15 -0400
Subject: Tkinter / Tk 8.5
In-Reply-To: <pan.2007.09.26.20.31.31.424223@vscht.cz>
References: <pan.2007.09.26.20.31.31.424223@vscht.cz>
Message-ID: <46FBBC1F.5010408@codebykevin.com>

Michal Bozon wrote:
> Today has been released a first beta of Tk 8.5, including a Ttk
> (tile) style engine, which makes possible the native look
> of widgets on MS
> platform, without having to install any extension.
> 
> http://wiki.tcl.tk/11075
> http://sourceforge.net/mailarchive/message.php?msg_name=1190813039.46fa5d6f6a06b%40webmail.nist.gov
> 
> Is there a chance it will be included in 2.5.x, 2.6 or 3.0 ?
> 
>  -m.

Did you know that a wrapper for use with Tk 8.4.x is located here?

http://tkinter.unpythonic.net/wiki/TileWrapper

This does require a separate installation of the Tile libraries, but 
those can be obtained from ActiveState.

I use this wrapper myself on OS X with a commercial application I 
develop, and Tile makes a big difference.

(I maintain and update this wrapper at the wiki, but am not the original 
author.)

--Kevin

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


From simon at brunningonline.net  Thu Sep 27 12:48:44 2007
From: simon at brunningonline.net (Simon Brunning)
Date: Thu, 27 Sep 2007 17:48:44 +0100
Subject: True of False
In-Reply-To: <1190910814.594559.30880@n39g2000hsh.googlegroups.com>
References: <1190910814.594559.30880@n39g2000hsh.googlegroups.com>
Message-ID: <8c7f10c60709270948l3cecc08ds133004ed4709edc3@mail.gmail.com>

On 9/27/07, koutoo at hotmail.com <koutoo at hotmail.com> wrote:
> I tried writing a true and false If statement and didn't get
> anything?  I read some previous posts, but I must be missing
> something.  I just tried something easy:
>
> a = ["a", "b", "c", "d", "e", "f"]
>
> if "c" in a == True:
>      Print "Yes"
>
> When I run this, it runs, but nothing prints.  What am I doing wrong?

Just use

if "c" in a:

and all will be well. The True object isn't the only truthy value in
Python - see <http://docs.python.org/lib/truth.html>.

-- 
Cheers,
Simon B.
simon at brunningonline.net


From aleax at mac.com  Sat Sep  1 21:38:59 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 1 Sep 2007 18:38:59 -0700
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<7xlkbsmqe4.fsf@ruckus.brouhaha.com>
	<1188525647.003223.199620@q5g2000prf.googlegroups.com>
	<mailman.181.1188527203.28954.python-list@python.org>
	<1188537516.622167.115080@z24g2000prh.googlegroups.com>
	<mailman.192.1188556734.28954.python-list@python.org>
Message-ID: <1i3rxit.1750ghi14bbcm3N%aleax@mac.com>

Ricardo Ar?oz <ricaraoz at gmail.com> wrote:
   ...
> We should remember that the level
> of security of a 'System' is the same as the level of security of it's
> weakest component,

Not true (not even for security, much less for reliability which is
what's being discussed here).

It's easy to see how this assertion of yours is totally wrong in many
ways...

Example 1: a toy system made up of subsystem A (which has a probability
of 90% of working right) whose output feeds into subsystem B (which has
a probability of 80% of working right).  A's failures and B's faliures
are statistically independent (no common-mode failures, &c).

The ``level of goodness'' (probability of working right) of the weakest
component, B, is 80%; but the whole system has a ``level of goodness''
(probability of working right) of just 72%, since BOTH subsystems must
work right for the whole system to do so.  72 != 80 and thus your
assertion is false.

More generally: subsystems "in series" with independent failures can
produce a system that's weaker than its weakest component.


Example 2: another toy system made up of subsystems A1, A2 and A3, each
trying to transform the same input supplied to all of them into a 1 bit
result; each of these systems works right 80% of the time, statistically
independently (no common-mode failures, &c).  The three subsystems'
results are reconciled by a simple majority-voting component M which
emits as the system's result the bit value that's given by two out of
three of the Ai subsystems (or, of course, the value given unanimously
by all) and has extremely high reliability thanks to its utter
simplicity (say 99.9%, high enough that we can ignore M's contribution
to system failures in a first-order analysis).

The whole system will fail when all Ai fail together (probability
0.2**3) or when 2 out of them fail while the hird one is working
(probability 3*0.8*0.2**2):

>>> 0.2**3+3*0.2**2*0.8
0.10400000000000004

So, the system as a whole has a "level of goodness" (probability of
working right) of almost 90% -- again different from the "weakest
component" (each of the three Ai's), in this case higher.

More generally: subsystems "in parallel" (arranged so as to be able to
survive the failure of some subset) with indipendent failures can
produce a system that's stronger than its weakest component.


Even in the field of security, which (changing the subject...) you
specifically refer to, similar considerations apply.  If your assertion
was correct, then removing one component would never WEAKEN a system's
security -- it might increase it if it was the weakest, otherwise it
would leave it intact.  And yet, a strong and sound tradition in
security is to require MULTIPLE components to be all satisfied e.g. for
access to secret information: e.g. the one wanting access must prove
their identity (say by retinal scan), possess a physical token (say a
key) AND know a certain secret (say a password).  Do you really think
that, e.g., removing the need for the retinal scan would make the
system's security *STRONGER*...?  It would clearly weaken it, as a
would-be breaker would now need only to purloin the key and trick the
secret password out of the individual knowing it, without the further
problem of falsifying a retinal scan successfully.  Again, such security
systems exist and are traditional exactly because they're STRONGER than
their weakest component!


So, the implication accompanying your assertion, that strenghtening a
component that's not the weakest one is useless, is also false.  It may
indeed have extremely low returns on investment, depending on system's
structure and exact circumstances, but then again, it may not; nothing
can be inferred about this ROI issue from the consideration in question.


Alex


From ivoras at _fer.hr_  Wed Sep 12 06:34:49 2007
From: ivoras at _fer.hr_ (Ivan Voras)
Date: Wed, 12 Sep 2007 12:34:49 +0200
Subject: Python 3K or Python 2.9?
In-Reply-To: <46e7974d$0$31726$426a74cc@news.free.fr>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
Message-ID: <fc8fc9$4qa$1@news2.carnet.hr>

Bruno Desthuilliers wrote:
> TheFlyingDutchman a ?crit :
>> Python user and advocate Bruce Eckel is disappointed with the
>> additions (or lack of additions) in Python 3:
>>
>> http://www.artima.com/weblogs/viewpost.jsp?thread=214112
> 
> I'd say Mr Eckel fails to graps some of the great points about Python's 
> object model - the rant about the use of 'self' is a sure clue.

What does "self" have to do with an object model? It's an 
function/method argument that might as well be hidden in the compiler 
without ever touching the role it has (if not, why?). I agree that it's 
needless noise in a language.

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From tjreedy at udel.edu  Sun Sep  9 17:07:37 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 9 Sep 2007 17:07:37 -0400
Subject: Modul (%) in python not like in C?
References: <880dece00709091201n449d4c2k31998a5d426de17d@mail.gmail.com>
Message-ID: <fc1nar$7ni$1@sea.gmane.org>


"Dotan Cohen" <dotancohen at gmail.com> wrote in message 
news:880dece00709091201n449d4c2k31998a5d426de17d at mail.gmail.com...
| FIrst of all, how is the % symbol (as in 70%6=4) called in English?
|
| Second, in Turbo C -111%10=-1 however in python -111%10=9. Is one or
| the other in error? Is this a known gotcha? I tried to google the
| subject however one cannot google the symbol %. Thanks in advance.

Call it a known gotcha inherent to integers.  In the realm of counts (aka 
non-negative integers), there is one sensible definition of division and 
modulus (remainder).  It has various nice properties.  With mixed positive 
and negative integers, there are choices, and none have all the nice 
properties.  The basic problem is that '-infinity' and 0 are in opposite 
directions instead of the same direction ;-).  Guido made one consistent 
choice (which matches some other languages, I believe).  Others have made 
another consistent choice or no choice at all (leaving the choice to 
implementations).  I believe I have seen at least one book, if not 
language, that defined // and % so that remainders have the same sign as 
the numerator.  (Or was it denominator?)

tjr





From sisson.j at gmail.com  Thu Sep  6 13:55:52 2007
From: sisson.j at gmail.com (J Sisson)
Date: Thu, 6 Sep 2007 12:55:52 -0500
Subject: Beginners Query - Simple counter problem
In-Reply-To: <WZidnbvgAJstpX3bRVnytgA@bt.com>
References: <WZidnbvgAJstpX3bRVnytgA@bt.com>
Message-ID: <4297a9020709061055o5c09213wb16d400842f0825b@mail.gmail.com>

Silly question, but are you importing random somewhere in that file?

It works on both my XP machine and my Linux machine (both from CLI) after
importing random...though it runs through this:

while count <= i:

i + 1 times...(You initialize count to 0, then loop over it until it hits
i+1 (at which point the while breaks), which means if you run d6(3), you're
actually getting back random.randint(1,6) x 4, not x3 (as would be
expected)).  Initializing count to 1 will fix that, or you could change the
while to:

while count < i:

Either way works.

Jonathon

On 9/6/07, David Barr <david.barr456 at btinternet.com> wrote:
>
> I am brand new to Python (this is my second day), and the only
> experience I have with programming was with VBA.  Anyway, I'm posting
> this to see if anyone would be kind enough to help me with this (I
> suspect, very easy to solve) query.
>
> The following code is in a file which I am running through the
> interpreter with the execfile command, yet it yeilds no results.  I
> appreciate I am obviously doing something really stupid here, but I
> can't find it.  Any help appreciated.
>
>
> def d6(i):
>      roll = 0
>      count = 0
>      while count <= i:
>          roll = roll + random.randint(1,6)
>          count += 1
>
>      return roll
>
> print d6(3)
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Computers are like air conditioners...
They quit working when you open Windows.
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From m.n.summerfield at googlemail.com  Fri Sep 14 16:00:45 2007
From: m.n.summerfield at googlemail.com (Mark Summerfield)
Date: Fri, 14 Sep 2007 20:00:45 -0000
Subject: An ordered dictionary for the Python library?
In-Reply-To: <fcemqi$g76$1@daisy.noc.ucla.edu>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<7xzlzrtrjn.fsf@ruckus.brouhaha.com>
	<1189664832.876539.86800@k79g2000hse.googlegroups.com>
	<7xps0mmig9.fsf@ruckus.brouhaha.com>
	<1189733708.659317.83950@y42g2000hsy.googlegroups.com>
	<1189753968.917636.310120@19g2000hsx.googlegroups.com>
	<fcemqi$g76$1@daisy.noc.ucla.edu>
Message-ID: <1189800045.642278.313860@o80g2000hse.googlegroups.com>

On 14 Sep, 20:25, James Stroud <jstr... at mbi.ucla.edu> wrote:
> Mark Summerfield wrote:
[snip]
> May I also make one more suggestion, to call it a "sort_ordered_dict"
> (or "sortordereddict", or even better a "sorteddict"--where the "ed"
> comes from "ordered")? Its hard for me to move past the established
> definition of "order", as we think of tuples being ordered--as in the
> first sentence ofhttp://en.wikipedia.org/wiki/Tuple--tosomething that
> is preserving an order according to a comparison. The distinction is so
> firmly ingrained in my head that it took me a while to wake up to the
> fact that you were describing something completely different than an
> ordered dictionary (e.g.http://www.voidspace.org.uk/python/odict.html)
> even though you were being very unambiguous with your description.
>
> And I also think the ability to drop it in for a built-in dict is very
> valuable.
>
> James

It seems that the correct Python terminology for this is indeed
sorteddict (ordered by key), with ordereddict meaning (in insertion
order).

I guess I'll have to rename my module (although unfortunately, my book
has just gone into production and I have a (simpler) example of what I
considered to be an ordered dict, so I will be adding to the
terminology confusion). That notwithstanding, given that it is a
sorteddict, how is the API?



From martin at v.loewis.de  Tue Sep 11 17:10:11 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 11 Sep 2007 23:10:11 +0200
Subject: Compiler Python
In-Reply-To: <mailman.404.1189543244.2658.python-list@python.org>
References: <000001c7f4a2$307fa720$917ef560$@com>
	<mailman.404.1189543244.2658.python-list@python.org>
Message-ID: <46e70434$0$16384$9b622d9e@news.freenet.de>

> Someone knows since as I can obtain the information detailed about the
> compiler of Python? (Table of tokens, lists of productions of the
> syntactic one , semantic restrictions...)

The EBNF grammar is in Grammar/Grammar; this also implies the list
of tokens. Another list of tokens in Include/token.h. The semantic
restrictions are mostly implemented as SyntaxError. These are
raised under various circumstances - search the code for SyntaxError,
for details.

Regards,
Martin


From jzgoda at o2.usun.pl  Mon Sep  3 16:19:52 2007
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Mon, 03 Sep 2007 22:19:52 +0200
Subject: Python object <-> XML
In-Reply-To: <1188849714.128121.139450@r34g2000hsd.googlegroups.com>
References: <1188849714.128121.139450@r34g2000hsd.googlegroups.com>
Message-ID: <fbhqav$b2r$1@atlantis.news.tpi.pl>

Samuel napisa?(a):

> Say you have the following XML:
> 
> <item ref="1">
>   <name>item 1</name>
> </item>
> <item ref="2">
>   <name>item 2</name>
> </item>
> <group>
>   <item ref="1" />
>   <item ref="2" />
>   <name>my group</name>
> </group>
> 
> Is there an easy way (i.e. without writing a sax/dom parser) to load
> this into a (number of) Python object(s), manipulate the instance, and
> save the result back to XML?

Yea, use ElementTree and you'd get a bunch of nested lists of very
simple objects.

-- 
Jarek Zgoda
http://jpa.berlios.de/


From ironfroggy at gmail.com  Fri Sep 28 09:17:54 2007
From: ironfroggy at gmail.com (Calvin Spealman)
Date: Fri, 28 Sep 2007 09:17:54 -0400
Subject: Importing Module To Use Variables In A Second Module
In-Reply-To: <slrnffo891.17r.rshepard@salmo.appl-ecosys.com>
References: <slrnffo891.17r.rshepard@salmo.appl-ecosys.com>
Message-ID: <76fd5acf0709280617s5a934b8cl459d92a428bdbdd5@mail.gmail.com>

Most problems like this are caused by trying to access the attributes
of the module before that module is fully executed, and thus before
they are defined.

For example, if you have A.py:
  import B
  data = "TEST"

And B.py:
  import A
  print A.data

Now, if you run A,py, it will import B before it defines its global
variable 'data', so that when the B module tries to import A and then
print A.data, it has not been defined yet. Look into the possibility
that such an import loop is occurring in your code. You can import in
loops, but not if you access things defined globally in one from a
global scope in another.

On 27 Sep 2007 21:30:10 GMT, rshepard at nospam.appl-ecosys.com
<rshepard at nospam.appl-ecosys.com> wrote:
>   I'm stymied by what should be a simple Python task: accessing the value of
> a variable assigned in one module from within a second module. I wonder if
> someone here can help clarify my thinking. I've re-read Chapter 16 (Module
> Basics) in Lutz and Ascher's "Learning Python" but it's not working for me.
>
>   In one module (the "source"), variablePage.py, three wxPython widgets
> display values that are assigned to variables: curVar, UoDlow, and UoDhigh.
> I want to display then in equivalent widgets on a wxPython notebook tab in a
> different module, the "importer."
>
>   At the top of the importer module I have:
>
> from variablePage import curVar, UoDlow, UoDhigh
>
> and I try to display the values of those variables in widgets on this page.
> But, python complains:
>
>     from variablePage import curVar, UoDlow, UoDhigh
> ImportError: cannot import name curVar
>
>   I've also tried
>
> import variablePage as VP
>
>   and referenced the variables as VP.curVar, VP.UoDlow, and VP.UoDhigh, but
> python still doesn't like this:
>
>   File "/data1/eikos/fuzSetPage.py", line 364, in loadParVar
>     first = VP.curVar
> AttributeError: 'module' object has no attribute 'curVar'
>
>   Both of these forms are used in the book (pages 260-261) in simple
> examples. I also get errors if I try importing using the class name before
> the variable name.
>
>   A clue stick would be very helpful since I am not seeing just what I'm
> doing incorrectly.
>
> Rich
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
Read my blog! I depend on your acceptance of my opinion! I am interesting!
http://ironfroggy-code.blogspot.com/


From bbxx789_05ss at yahoo.com  Fri Sep 21 03:38:24 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Fri, 21 Sep 2007 00:38:24 -0700
Subject: newb: BeautifulSoup
In-Reply-To: <1190343890.375836.78630@r29g2000hsg.googlegroups.com>
References: <1190343890.375836.78630@r29g2000hsg.googlegroups.com>
Message-ID: <1190360304.800016.219320@k79g2000hse.googlegroups.com>

On Sep 20, 9:04 pm, crybaby <joemystery... at gmail.com> wrote:
> I need to traverse a html page with big table that has many row and
> columns.  For example, how to go 35th td tag and do regex to retireve
> the content.  After that is done, you move down to 15th td tag from
> 35th tag (35+15) and do regex to retrieve the content?

1) You can find your table using one of these methods:

a)
target_table = soup.find('table', id='car_parts')

b)
tables = soup.findall('table')
target_table = tables[2]

The tables are put in a list in the order that they appear on the
page.


2) You can get all the td's in the table using this statement:

all_tds = target_table.findall('td')


3) You can get the contents of the tags using these statements:

print all_tds[34].string
print all_tds[49].string


Here is an example:

from BeautifulSoup import BeautifulSoup

doc = """
<html>
    <head>
        <title></title>
    </head>
    <body>
        <table>
        </table>

        <table>
            <tr><td>hello</td></tr>
            <tr><td>world</td><td>goodbye</td></tr>
        </table>
    </body>
</html>
"""

soup = BeautifulSoup(doc)

tables = soup.findAll('table')
target_table = tables[1]

all_tds = target_table.findAll('td')
print all_tds[0].string
print all_tds[2].string

--output:--
hello
goddbye






From adonisv at REMOVETHISearthlink.net  Mon Sep 24 20:25:09 2007
From: adonisv at REMOVETHISearthlink.net (Adonis Vargas)
Date: Mon, 24 Sep 2007 20:25:09 -0400
Subject: is there some module update(install tools)?
In-Reply-To: <8520e$46f83ee4$4df9f6c6$14843@news2.tudelft.nl>
References: <8520e$46f83ee4$4df9f6c6$14843@news2.tudelft.nl>
Message-ID: <13fglb5p4bo82c7@corp.supernews.com>

hyena wrote:
> Hi,
> 
>   I am quite new to python and am looking for some tools that can 
> install and update modules a bit more intelligent then "python setup.py 
> install". Is there some thing like "yum" in fedora which can search and 
> install/update packages automatically?
> 
> thanks in advance!

setuptools is for you
http://peak.telecommunity.com/DevCenter/setuptools

Once installed, its easy as easy_install <module name>

Hope this helps.

Adonis Vargas


From mouseit101 at gmail.com  Fri Sep 14 23:45:57 2007
From: mouseit101 at gmail.com (mouseit)
Date: Sat, 15 Sep 2007 03:45:57 -0000
Subject: List append
In-Reply-To: <1189827762.011325.315840@r29g2000hsg.googlegroups.com>
References: <1189826727.204061.310380@d55g2000hsg.googlegroups.com>
	<1189827762.011325.315840@r29g2000hsg.googlegroups.com>
Message-ID: <1189827957.630379.54070@g4g2000hsf.googlegroups.com>

On Sep 14, 11:42 pm, Stephen <Obey.... at gmail.com> wrote:
> In your code, "array" is a class attribute, so it is shared among all
> instances. You need to use the __init__ method to define instance
> (data) attributes instead:
>
> def __init__(self):
>     self.array = []
>
> On Sep 14, 11:25 pm, mouseit <mouseit... at gmail.com> wrote:
>
> > I'm trying to add an element to a list which is a property of an
> > object, stored in an array. When I append to one element, all of the
> > lists are appended!
>
> > Example Code:
>
> > class Test:
> >     array = []
>
> > myTests = [Test() , Test() , Test()]
> > print len(myTests[1].array)
> > myTests[0].array.append( 5 )
> > print len(myTests[1].array)
>
> > prints:
> > 0
> > 1
>
> > This is probably a really easy question (I'm very new to python), so
> > thanks in advance for your help!

Awsome, that worked. Thanks!



From hniksic at xemacs.org  Fri Sep 28 20:12:24 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Sat, 29 Sep 2007 02:12:24 +0200
Subject: Can I overload the compare (cmp()) function for a Lists ([])
	index function?
References: <1191000652.430036.288400@y42g2000hsy.googlegroups.com>
Message-ID: <87tzpel47r.fsf@mulj.homelinux.net>

xkenneth <xkenneth at gmail.com> writes:

> Looking to do something similair. I'm working with alot of timestamps
> and if they're within a couple seconds I need them to be indexed and
> removed from a list.
> Is there any possible way to index with a custom cmp() function?
>
> I assume it would be something like...
>
> list.index(something,mycmp)

The obvious option is reimplementing the functionality of index as an
explicit loop, such as:

def myindex(lst, something, mycmp):
    for i, el in enumerate(lst):
        if mycmp(el, something) == 0:
            return i
    raise ValueError("element not in list")

Looping in Python is slower than looping in C, but since you're
calling a Python function per element anyway, the loop overhead might
be negligible.

A more imaginative way is to take advantage of the fact that index
uses the '==' operator to look for the item.  You can create an object
whose == operator calls your comparison function and use that object
as the argument to list.index:

class Cmp(object):
    def __init__(self, item, cmpfun):
        self.item = item
        self.cmpfun = cmpfun
    def __eq__(self, other):
        return self.cmpfun(self.item, other) == 0

# list.index(Cmp(something, mycmp))

For example:

>>> def mycmp(s1, s2):
...   return cmp(s1.tolower(), s2.tolower())
>>> ['foo', 'bar', 'baz'].index(Cmp('bar', mycmp))
1
>>> ['foo', 'bar', 'baz'].index(Cmp('Bar', mycmp))
1
>>> ['foo', 'bar', 'baz'].index(Cmp('nosuchelement', mycmp))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: list.index(x): x not in list

The timeit module shows, somewhat surprisingly, that the first method
is ~1.5 times faster, even for larger lists.


From horpner at yahoo.com  Mon Sep  3 01:05:11 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Mon, 03 Sep 2007 05:05:11 GMT
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
	<1188735642.391419.103650@19g2000hsx.googlegroups.com>
	<1188740716.423349.304370@y42g2000hsy.googlegroups.com>
	<1188743299.664137.194760@d55g2000hsg.googlegroups.com>
	<46daeaec$0$19889$426a74cc@news.free.fr>
	<46DB04DD.80801@v.loewis.de>
	<46db085d$0$16113$9b4e6d93@newsspool1.arcor-online.net>
	<13dmctogeh19410@corp.supernews.com>
Message-ID: <bCMCi.38254$G23.34196@newsreading01.news.tds.net>

On 2007-09-02, Steven D'Aprano
<steve at REMOVE-THIS-cybersource.com.au> wrote:
> A big question mark in my mind is Lisp, which according to
> aficionados is just as dynamic as Python, but has native
> compilers that generate code running as fast as highly
> optimized C. I'm not qualified to judge whether the lessons
> learnt from Lisp can be applied to Python, but in any case Lisp
> is an old, old language -- only Fortran is older. The amount of
> development effort and money put into Lisp dwarfs that put into
> Python by possibly a hundred or more.

Lisp, as far as I know, requires type declarations, discipline,
deep knowledge of Lisp, and more than passing knowledge of your
Lisp implementation in order to generate code that's competitive
with C. On the other hand, Lisp afficionados don't have a problem
meeting those requirements. ;)

> So... if you'd like to see Python run as fast as C or Lisp, and
> you have a few tens of millions of dollars spare to invest in
> development, I think the Python Software Foundation would love
> to hear from you.

Hmmm. I have four dollars... almost five...

-- 
Neil Cerutti


From bozonm at vscht.cz  Wed Sep 26 20:24:14 2007
From: bozonm at vscht.cz (Michal Bozon)
Date: Thu, 27 Sep 2007 02:24:14 +0200
Subject: ~ bit-wise unary operator
References: <mailman.1138.1190844872.2658.python-list@python.org>
Message-ID: <pan.2007.09.27.00.24.14.417054@vscht.cz>

cau,
maybe int is represented internally as a signed integer

you can use numpy types:

>>> import numpy
>>> ~ numpy.uint16(7978)
57557

 -m.


On Thu, 27 Sep 2007 00:14:49 +0200, Ladislav Andel wrote:

> Hello,
> why ~ bit-wise unary operator returns -(x+1) and not bit inversion of 
> the given integer?
> 
> example:
> a = 7978
> a = ~a
> python returns -7979
> 
> but I need to get back 57557 as in C language.
> 
> which is also in binary
> 0001111100101010
> and inverted
> 1110000011010101
> 
> Is here any other operator or do I have to write it on my own?
> 
> Thank you,
> Lada



From jelleferinga at gmail.com  Thu Sep  6 14:18:00 2007
From: jelleferinga at gmail.com (jelle)
Date: Thu, 06 Sep 2007 18:18:00 -0000
Subject: initializing cooperative method
In-Reply-To: <13e0bgg5lo0p2ec@corp.supernews.com>
References: <1189095131.853954.233660@r34g2000hsd.googlegroups.com>
	<13e0bgg5lo0p2ec@corp.supernews.com>
Message-ID: <1189102680.957512.152950@k79g2000hse.googlegroups.com>

Ai, calling super(Abstract) is just getting object, sure...

However, I'm still curious to know if there's a good idiom for
repeating the argument in __init__ for the super(Concrete,
self).__init__ ?

Thanks,

-jelle



From mickey at disney.com  Fri Sep  7 21:58:21 2007
From: mickey at disney.com (Wiseman)
Date: Fri, 07 Sep 2007 21:58:21 -0400
Subject: Python Problem
Message-ID: <l404e316v2lknjsfrct9nlcs2jl9206qrf@4ax.com>

Hi,

The line:

import enchant

works perfectly OK when I call a Python progrma (sp.py) from IDLE
(WInXP). When I try to run it ftom the command line (python sp.py) the
response is:

Traceback (most recent call last):
   File "sp.py", line 3, in <module>
     import enchant
ImportError: No module named enchant

Searching my computer (the whole of drive c:\) I could not find ANY
file called enchant.*.

Does anyone know what is wrong?

Thanks

((:-()  Meir




From hat at se-162.se.wtb.tue.nl  Wed Sep 12 03:09:02 2007
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Wed, 12 Sep 2007 09:09:02 +0200
Subject: Python Problem
References: <l404e316v2lknjsfrct9nlcs2jl9206qrf@4ax.com>
	<pl6ee3hutvaf3s8399upqq4tap4bqn7r8m@4ax.com>
Message-ID: <slrnfef44e.1di.hat@se-162.se.wtb.tue.nl>

On 2007-09-11, Wiseman <mickey at disney.com> wrote:
>
>  Hi,
>
> OK - it works in WindowsXP.
> I installed "enchant" on my SuSE 10.0 (using YAST). 
> The enchant Suse package looks like a general Linux package, not a
> Python specific.

You'd seem to be right judging by this web-page:
http://www.novell.com/products/linuxpackages/suselinux/enchant.html

As you can see, there is no file installed at a path with "python" in it.

> What am I missing?

Python bindings to the library perhaps?
You may be more lucky with an enchant-dev package (if it exists). I am however
not a Suse user and not an echant user (well, not from my Python code at least).


Albert



From rshepard at nospam.appl-ecosys.com  Thu Sep 27 17:30:10 2007
From: rshepard at nospam.appl-ecosys.com (rshepard at nospam.appl-ecosys.com)
Date: 27 Sep 2007 21:30:10 GMT
Subject: Importing Module To Use Variables In A Second Module
Message-ID: <slrnffo891.17r.rshepard@salmo.appl-ecosys.com>

  I'm stymied by what should be a simple Python task: accessing the value of
a variable assigned in one module from within a second module. I wonder if
someone here can help clarify my thinking. I've re-read Chapter 16 (Module
Basics) in Lutz and Ascher's "Learning Python" but it's not working for me.

  In one module (the "source"), variablePage.py, three wxPython widgets
display values that are assigned to variables: curVar, UoDlow, and UoDhigh.
I want to display then in equivalent widgets on a wxPython notebook tab in a
different module, the "importer."

  At the top of the importer module I have:

from variablePage import curVar, UoDlow, UoDhigh

and I try to display the values of those variables in widgets on this page.
But, python complains:

    from variablePage import curVar, UoDlow, UoDhigh
ImportError: cannot import name curVar

  I've also tried

import variablePage as VP

  and referenced the variables as VP.curVar, VP.UoDlow, and VP.UoDhigh, but
python still doesn't like this:

  File "/data1/eikos/fuzSetPage.py", line 364, in loadParVar
    first = VP.curVar
AttributeError: 'module' object has no attribute 'curVar'

  Both of these forms are used in the book (pages 260-261) in simple
examples. I also get errors if I try importing using the class name before
the variable name.

  A clue stick would be very helpful since I am not seeing just what I'm
doing incorrectly.

Rich


From bj_666 at gmx.net  Sat Sep  8 04:42:51 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 8 Sep 2007 08:42:51 GMT
Subject: python sqlite THREADSAFE?
References: <fbtn0r$bol$1@aioe.org>
Message-ID: <5kf5kbF33dv5U2@mid.uni-berlin.de>

On Sat, 08 Sep 2007 10:37:51 +0200, EuGeNe Van den Bulke wrote:

> Is the sqlite distributed with Python 2.5 compiled with the 
> -DTHREADSAFE=1 flag? My gutt feeling is Windows (yes) MacOS/Linux (no) 
> but ...

Take a look at the `threadsafety` attribute of the module.

Ciao,
	Marc 'BlackJack' Rintsch


From michele.simionato at gmail.com  Fri Sep  7 02:01:30 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Fri, 07 Sep 2007 06:01:30 -0000
Subject: concise code (beginner)
In-Reply-To: <13dv4uqqb806ff0@corp.supernews.com>
References: <13dsvqrqivtf092@corp.supernews.com>
	<13dv4uqqb806ff0@corp.supernews.com>
Message-ID: <1189144890.994819.55200@w3g2000hsg.googlegroups.com>

On Sep 6, 7:44 am, "bambam" <da... at asdf.asdf> wrote:
> First, thank you.
>
> All of the suggestions match what we want to do much better
> than what we are doing. We have a script, written in python,
> which is doing testing. But the python script doesn't look anything
> like the test script, because the python script is written in python,
> and the test script is a series of instrument command macros.
>
> By putting the script sequence into a collection that is separate
> from the python code, we will get script list that general engineering
> will find much easier to understand:
>
> def script(self)
>     def a0010(): global self; self.power_on([self.dev]);
>     def a0020(): global self; self.dev.addLog([self.name, ' started']);
>     def a0030(): global self; self.resetMinuteReg([self.dev]);
>     def a0040(): global self; self.disablePLmessages([self.dev]);
>     def a0050(): global self; self.dev.testH.writePLram((PL.BCAL12<<8));

Look at generative tests in py.test or nose: they are a much
better solution for what you are doing.

            Michele Simionato



From http  Sat Sep 22 23:14:20 2007
From: http (Paul Rubin)
Date: 22 Sep 2007 20:14:20 -0700
Subject: Factory function with keyword arguments
References: <13fbl9ertj5es12@corp.supernews.com>
Message-ID: <7xejgqysxf.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> writes:
> def factory(flag):
>     if flag: kw = 'spam'
>     else: kw = 'ham'
>     def foo(obj, arg):
>         kwargs = dict([(kw, arg)])
>         return obj.method(**kwargs)
>     return foo

Untested:

    def factory(flag):
       def foo(obj, arg):
          p = 'spam' if flag else 'ham'
          return obj.method(**{p:arg})
       return foo

is the obvious way in that style.


From Brian.McCann at viziant.net  Fri Sep  7 14:11:14 2007
From: Brian.McCann at viziant.net (Brian McCann)
Date: Fri, 7 Sep 2007 14:11:14 -0400
Subject: passing command line arguments
References: <93066C069973ED448DC2BCEA9C44A7383BE32D@efmailx>
	<200709071158.35779.bulliver@badcomputer.org>
Message-ID: <93066C069973ED448DC2BCEA9C44A7383BE330@efmailx>

 
Darren,
Thanks
 

________________________________

From: python-list-bounces+brian.mccann=viziant.net at python.org on behalf of darren kirby
Sent: Fri 9/7/2007 1:58 PM
To: python-list at python.org
Subject: Re: passing command line arguments



quoth the Brian McCann:
> Hi,
>
> when I run the script show_args2.py
>
> # ./show_args2.py 1 2 3
>
> I get the following error
>
> Traceback (most recent call last):
>   File "./show_args2.py", line 4, in ?
>     print 'The arguments of %s are "%s"' %s \
>     NameError: name 's' is not defined
>
>
> #####################################
> <mailto:brian.mccann at viziant.net>
> this is the script
>  #!/usr/bin/python
> import sys, string
> print 'The arguments of %s are "%s"' %s \
>         (sys.argv[0], string.join(sys.argv[1:]))

You don't want the 's' on the last format operator. Try:

 print 'The arguments of %s are "%s"' % \
         (sys.argv[0], string.join(sys.argv[1:]))

> any help would be greatly appreciated
>
> -Brian

-d
--
darren kirby :: Part of the problem since 1976 :: http://badcomputer.org
"...the number of UNIX installations has grown to 10, with more expected..."
- Dennis Ritchie and Ken Thompson, June 1972
--
http://mail.python.org/mailman/listinfo/python-list


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From steve at REMOVE-THIS-cybersource.com.au  Fri Sep  7 08:03:23 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Fri, 07 Sep 2007 12:03:23 -0000
Subject: Generating a unique identifier
Message-ID: <13e2fgbbpsatm39@corp.supernews.com>

I have an application that will be producing many instances, using them 
for a while, then tossing them away, and I want each one to have a unique 
identifier that won't be re-used for the lifetime of the Python session.

I can't use the id() of the object, because that is only guaranteed to be 
unique during the lifetime of the object.

For my application, it doesn't matter if the ids are predictable, so I 
could do something as simple as this:

def unique_id():
    n = 1234567890
    while True:
        yield n
        n += 1

unique_id = unique_id()

while Application_Is_Running:
    make_an_object(id=unique_id())
    do_stuff_with_objects()
    delete_some_of_them()

which is easy enough, but I thought I'd check if there was an existing 
solution in the standard library that I missed. Also, for other 
applications, I might want them to be rather less predictable.



-- 
Steven.


From bignose+hates-spam at benfinney.id.au  Fri Sep 21 10:07:28 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 22 Sep 2007 00:07:28 +1000
Subject: SHOCK: WHY None?
References: <1190383137.015553.235870@o80g2000hse.googlegroups.com>
Message-ID: <87ps0cru1r.fsf@benfinney.id.au>

n00m <n00m at narod.ru> writes:

> def f(i,sm):
>     if i+1==len(a):
>         print sm+a[i]
>         return sm+a[i]
>     else:
>         f(i+1,sm+a[i])
> 
> a=[1,2,3,4,5]
> 
> print f(0,0)
> 
> >>>
> 15
> None
> >>>

Here's one to meditate on:

    >>> def foo():
    ...     print "foo"
    ... 
    >>> print foo()
    foo
    None
    >>> def bar():
    ...     return "bar"
    ... 
    >>> print bar()
    bar
    >>> def baz():
    ...     pass
    ... 
    >>> print baz()
    None

It should be fairly clear how these three are different. If not, I
suspect you haven't worked your way through the Python tutorial;
please do so.

    <URL:http://www.python.org/tut/>

-- 
 \          "Are you pondering what I'm pondering?" "Well, I think so, |
  `\    Brain, but if Jimmy cracks corn, and no one cares, why does he |
_o__)                        keep doing it?"  -- _Pinky and The Brain_ |
Ben Finney


From robert.kern at gmail.com  Fri Sep  7 15:43:10 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 07 Sep 2007 14:43:10 -0500
Subject: Python and CUDO
In-Reply-To: <1189148811.336283.72920@50g2000hsm.googlegroups.com>
References: <46E05DC0.7090102@glocalnet.net>	<mailman.186.1189113183.2658.python-list@python.org>
	<1189148811.336283.72920@50g2000hsm.googlegroups.com>
Message-ID: <fbs9km$4kb$1@sea.gmane.org>

Paddy wrote:
> On Sep 6, 10:12 pm, Robert Kern <robert.k... at gmail.com> wrote:
>> Veronika Lindstrand Kant wrote:
>>> Hi!
>>> I just wonder if there are any plans for building any support using
>>> NIVIDAS CUDO plattform into python?
>> Not into Python itself, but we are working on interfacing with NVIDIA's CUDA,
>> yes (presuming you actually meant "NVIDIA's CUDA" rather than "NIVIDAS CUDO").
>>
>> http://code.google.com/p/pystream/
>>
>> --
>> Robert Kern
>>
>> "I have come to believe that the whole world is an enigma, a harmless enigma
>>  that is made terrible by our own mad attempt to interpret it as though it had
>>  an underlying truth."
>>   -- Umberto Eco
> 
> Maybe you and the CorePy guys at http://www.corepy.org/ could swap
> notes and give us a similar way to work with these accellerators?

We had a productive discussion at the SciPy '07 conference.

-- 
Robert Kern

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



From martin at v.loewis.de  Mon Sep  3 23:46:35 2007
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 04 Sep 2007 05:46:35 +0200
Subject: py3k - format specifier for strings
In-Reply-To: <eeednfMnn5paIkHbnZ2dnUVZ_sGvnZ2d@trueband.net>
References: <eeednfMnn5paIkHbnZ2dnUVZ_sGvnZ2d@trueband.net>
Message-ID: <46DCD51B.7040508@v.loewis.de>

>>>> a = "{0}".format(5.66)
>>>> a
> '5.66'
> 
> There are more options in PEP 3101 (fill, alignment, etc.), but I'm having
> trouble implementing them.

It would be good if you could describe these troubles in more detail.
What have you been trying, what happened, and what did you expect to
happen instead?

> Any help in the way of examples would be appreciated.

>From test_unicode.py:

"My name is {0}".format('Fred')
"My name is {0[name]}".format(dict(name='Fred')
"My name is {0} :-{{}}".format('Fred')

d = datetime.date(2007, 8, 18)
"The year is {0.year}".format(d)

'{0:.3s}'.format('abc')
'{0:.0s}'.format('abcdef')
'{0:3.3s}'.format('abc')
'{0:3.2s}'.format('abc')
'{0:x<0s}'.format('result')
'{0:x<7s}'.format('result')
'{0:^10s}'.format('result')
'{0!s}'.format('Hello')
'{0!s:15s}'.format('Hello')
'{0!r:}'.format('Hello')

Regards,
Martin


From pavlovevidence at gmail.com  Thu Sep 13 21:36:25 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Thu, 13 Sep 2007 18:36:25 -0700
Subject: An ordered dictionary for the Python library?
In-Reply-To: <fcc5lt$ish$1@daisy.noc.ucla.edu>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<7xzlzrtrjn.fsf@ruckus.brouhaha.com>
	<1189664832.876539.86800@k79g2000hse.googlegroups.com>
	<fcc5lt$ish$1@daisy.noc.ucla.edu>
Message-ID: <1189733785.813953.77370@k79g2000hse.googlegroups.com>

On Sep 13, 4:20 pm, James Stroud <jstr... at mbi.ucla.edu> wrote:
> Mark Summerfield wrote:
> > - If an item is inserted it is put in the right place (because the
> > underlying data structure, b*tree, skiplist or whatever is
> > intrinsically ordered by < on the key)
>
> +1 for all your suggestions below, but -1 for the above. You suggest that
>
>    myOrderedDict['key'] = value
>
> would place it in the dictionary in sorted order depending on 'key'.
> More natural to some of us (or maybe its just me) would be to append the
> key/value pair to the end of items.

Or, maybe, like, you know, you could have two different types that
maintain two different orders?


Carl Banks



From steve at holdenweb.com  Tue Sep  4 01:10:22 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 04 Sep 2007 01:10:22 -0400
Subject: So what exactly is a complex number?
In-Reply-To: <roy-3C221C.22043603092007@news.panix.com>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>	<mailman.4.1188866709.21370.python-list@python.org>
	<roy-3C221C.22043603092007@news.panix.com>
Message-ID: <fbipc0$o0c$1@sea.gmane.org>

Roy Smith wrote:
> Boris Borcic <bborcic at gmail.com> wrote:
>> Complex numbers are like a subclass of real numbers 
> 
> I wouldn't use the term "subclass".  It certainly doesn't apply in the same 
> sense it applies in OOPLs.  For example, you can't say, "All complex 
> numbers are real numbers".  In fact, just the opposite.
> 
> But, it's equally wrong to say, "real numbers are a subclass of complex 
> numbers", at least not if you believe in LSP 
> (http://en.wikipedia.org/wiki/Liskov_substitution_principle).  For example, 
> it is true that you can take the square root of all complex numbers.  It is 
> not, however, true that you can take square root of all real numbers.
> 
That's not true. I suspect what you are attempting to say is that the 
complex numbers are closed with respect to the square root operation, 
but the reals aren't. Clearly you *can* take the square root of all real 
numbers, since a real number *is* also a complex number with a zero 
imaginary component. They are mathematically equal and equivalent.

> Don't confuse "subset" with "subclass".  The set of real numbers *is* a 
> subset of the set of complex numbers.  It is *not* true that either reals 
> or complex numbers are a subclass of the other.

I don't think "subclass" has a generally defined meaning in mathematics 
(though such an assertion from me is usually a precursor to someone 
presenting evidence of my ignorance, so I should know better than to 
make them).

obpython: I have always thought that the "key widening" performed in 
dictionary lookup is a little quirk of the language:

 >>> d = {2: "indeedy"}
 >>> d[2.0]
'indeedy'
 >>> d[2.0+0j]
'indeedy'
 >>>

but it does reflect the fact that the integers are a subset of the 
reals, which are (as you correctly point out) a subset of the complexes.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From thorsten at thorstenkampe.de  Sat Sep 15 01:16:42 2007
From: thorsten at thorstenkampe.de (Thorsten Kampe)
Date: Sat, 15 Sep 2007 13:16:42 +0800
Subject: Https conversation - debug?
References: <1189799482.314951.238470@r34g2000hsd.googlegroups.com>
Message-ID: <MPG.2155eb96d9f98ec9989711@news.individual.de>

* Johny (Fri, 14 Sep 2007 12:51:22 -0700)
> Is there any good sniffer for https protocol?

What's the connection to Python?

> How can be watched https conversation?

ssldump. Note that in order to decrypt the traffic you need to have 
the server's private key.


From tjreedy at udel.edu  Fri Sep 14 13:06:03 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 14 Sep 2007 13:06:03 -0400
Subject: recursion
References: <fcbfnj$lh4$1@ss408.t-com.hr><slrnfeinvk.1cc.horpner@FIAD06.norwich.edu><mailman.491.1189700115.2658.python-list@python.org><slrnfeit3k.1lg.horpner@FIAD06.norwich.edu><fcdrv9$7lr$1@ss408.t-com.hr>
	<5kvbn3F5h7l3U1@mid.uni-berlin.de>
Message-ID: <fcef1n$489$1@sea.gmane.org>


"Marc 'BlackJack' Rintsch" <bj_666 at gmx.net> wrote in message 
news:5kvbn3F5h7l3U1 at mid.uni-berlin.de...
|    f([1, 2, 3])
| r1  f([2, 3]) + [1]
| r2  f([3]) + [2] + [1]
| r3  f([]) + [3] + [2] + [1]
| r4  [] + [3] + [2] + [1]

I might help to note that the above is effectively parenthesized

( ( ([]+{3]) + [2]) +[1])

*and* that each addition (in each pair of parentheses) is done
in a different execution frame (see below).

| And now the calls return:
|
| r3  [3] + [2] + [1]
| r2  [3, 2] + [1]
| r1  [3, 2, 1]
| > [3, 2, 1]  # how this come here? how python save variables from each
| > recursion?

*Each time* a function is called, an execution frame is created(1) that is 
separate from the function object itself.  Each execution frame has its own 
set of local variables.  In particular, each has its own slices of the 
original list.

There have been languages, for instance, Fortran IV, where local variables 
were part of the function 'object' and which therefore prohibited recursion 
because of the very problem you alluded to in your question.  (My guess is 
the functions had an InUse flag that was checked when the function was 
called.)

tjr

(1) A minor variation would be for function objects to have one 
pre-allocated execution frame for non-recursive calls and others allocated 
as needed for recursive calls. 





From daniel.j.larsson at gmail.com  Sun Sep 16 10:47:13 2007
From: daniel.j.larsson at gmail.com (Daniel Larsson)
Date: Sun, 16 Sep 2007 16:47:13 +0200
Subject: We need PIGs :)
In-Reply-To: <fcjdu0$2os$1@sea.gmane.org>
References: <mailman.131.1188450658.28954.python-list@python.org>
	<46d74472$0$402$426a34cc@news.free.fr> <87hcm81dot.fsf@kip.sateh.com>
	<5k9qpsF2mrncU3@mid.uni-berlin.de> <fcjdu0$2os$1@sea.gmane.org>
Message-ID: <2bfa72fa0709160747o53d4b767ne7da25c33498c19a@mail.gmail.com>

On 9/16/07, Colin J. Williams <cjw at sympatico.ca> wrote:
>
> Marc 'BlackJack' Rintsch wrote:
> > On Thu, 06 Sep 2007 09:00:02 +0200, Stefan Arentz wrote:
> >
> >> What I find really frustrating in Python (combined with usually bad
> >> documentation) is that many people have different styles. The most
> >> frustratinng being getFoo() vs .foo, vs get_foo().
> >
> > `getFoo()` is discouraged by PEP 8.  You don't have the choice between
> > `.foo` and `.get_foo()` in Java because Java has no properties and
> people
> > are trained to write getters and setters for everything.  I like that
> > choice in Python because I can write shorter code that is not cluttered
> > with very simple getters and setters.
> >
> > Ciao,
> >       Marc 'BlackJack' Rintsch
> Perhaps PEP 8 needs rethinking.  I prefer getFoo().
> Similarly, I feel that the standard indent of 4 increases the
> likelihood of running off the end of a line.  An indent of 1 isn't
> quite clear visually, but 2 is.


The point with a style guide is not to cater for everyones preferences, but
to set a common compromise.

If you find yourself going off the right margin a lot, perhaps you should
consider restructuring and refactoring your application, rather than
reducing your indentation.

Colin W.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From nagle at animats.com  Tue Sep  4 01:15:45 2007
From: nagle at animats.com (John Nagle)
Date: Mon, 03 Sep 2007 22:15:45 -0700
Subject: FCGI app reloading on every request
In-Reply-To: <46DCE052.40708@v.loewis.de>
References: <46DCDE59.8060109@animats.com> <46DCE052.40708@v.loewis.de>
Message-ID: <HG5Di.1553$Sd4.772@nlpi061.nbdc.sbc.com>

Martin v. L?wis wrote:
> John Nagle schrieb:
> 
>>   I'm converting a web app from CGI to FCGI.  The application works fine
>>under FCGI, but it's being reloaded for every request, which makes FCGI
>>kind of pointless.  I wrote a little FCGI app which prints when the
>>program is loaded and when it gets a request.  And indeed, the program
>>gets reloaded for
>>each HTTP request.  Something is probably misconfigured.  But what?
> 
> 
> The most likely reason is that your FastCGI server voluntarily choses
> to exit after one request. Can you share the mainloop of your
> application?
> 
> Regards,
> Martin

     It turns out that's not the problem.

     What's actually happening is that FCGI isn't running at all.
My .fcgi file is being executed by Apache's CGI handler, and
"fcgi.py" recognizes this, then reads the parameters as if
a CGI program.  So it works just like a CGI program: one
load per request.  Not sure why Apache is doing that yet.
I'm looking at Apache configuration files now.

     The main loop is in "fcgi.py", which calls the
user application as a function.  The user app doesn't have the
option of exiting after one request, short of aborting without
returning a result.

                     John Nagle


From gagsl-py2 at yahoo.com.ar  Fri Sep  7 21:33:36 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 07 Sep 2007 22:33:36 -0300
Subject: creating really big lists
References: <874pi92tr4.fsf@mulj.homelinux.net>
	<mailman.121.1189035929.2658.python-list@python.org>
	<1189057626.943757.210420@d55g2000hsg.googlegroups.com>
	<1189063849.118900.327540@22g2000hsm.googlegroups.com>
	<1189192606.119578.100820@r34g2000hsd.googlegroups.com>
Message-ID: <op.tybamaw3x6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 07 Sep 2007 16:16:46 -0300, Dr Mephesto <dnhkng at googlemail.com>  
escribi?:

> hey, that defaultdict thing looks pretty cool...
>
> whats the overhead like for using a dictionary in python?

Dictionaries are heavily optimized in Python. Access time is O(1),  
adding/removing elements is amortized O(1) (that is, constant time unless  
it has to grow/shrink some internal structures.)

-- 
Gabriel Genellina



From antroy at gmail.com  Sat Sep 29 06:39:43 2007
From: antroy at gmail.com (Ant)
Date: Sat, 29 Sep 2007 03:39:43 -0700
Subject: question about for cycle
In-Reply-To: <mailman.1275.1191060311.2658.python-list@python.org>
References: <mailman.1275.1191060311.2658.python-list@python.org>
Message-ID: <1191062383.322949.55300@d55g2000hsg.googlegroups.com>

On Sep 29, 11:04 am, "fdu.xia... at gmail.com" <fdu.xia... at gmail.com>
wrote:
...
> What should I do if I want the outer "for" cycle to continue or break ? If I
> put a "continue" or "break" in the inner cycle, it has no effect on the outer
> cycle.

I'd also be interested in the idiomatic solution to this one. I can
see a number of solutions, from the ugly:

for i in range(10):
    do_break = True
    for j in range(10):
       if j == 6:
          break
    else:
       do_break = False

    if do_break:
       break

This will break the outer loop if the inner loop exited with a break.

Using exceptions:

for i in range(10):
  try:
    for j in range(10):
       print i, j
       if j == 6:
          raise MyException
  except MyException, e:
    break # or continue or whatever.

Encapsulating in a function and using return:

def get_value():
  for i in range(10):
    for j in range(10):
       print i, j
       if j == 6:
          return fn(i, j)

I guess to an extent it would depend on the exact situation as to
which of these is more suitable. Are there any other recommended
solutions to this?

--
Ant...



From duncan.booth at invalid.invalid  Wed Sep 12 08:59:32 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 12 Sep 2007 12:59:32 GMT
Subject: cpython list __str__ method for floats
References: <13ectngf3aeqrb0@corp.supernews.com>
	<5kndseF4iskqU1@mid.individual.net>
	<13eehfo8nr5eu1d@corp.supernews.com>
	<5kq2n9F4uhr0U1@mid.individual.net>
Message-ID: <Xns99A98E5B893ACduncanbooth@127.0.0.1>

Bjoern Schliessmann <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> 
wrote:

>> The idea that 13.3 is a 'rounded' value for the number,
>> and that 13.300000000000001 is not a 'rounded' value of
>> the number, is a common error of intuitive mathematics.
> 
> I'm intrigued how /you/'d explain this, please do explain.

I think he is correct here: 13.300000000000001 is not exactly 
representable in IEEE 754. It is a rounded approximation to the true 
value just as is 13.3.

An argument can be made that instead of rounding the internal value to 
17 digits which is sufficient to ensure that you can roundtrip float->
string->float for all values, you could just round it to the minimum 
number of digits which guarantee the float->string->float roundtrip for 
that particular value.

Consider this as we gradually lose the more significant digits we see 
that last digit wasn't exactly 1 at all:

>>> 13.3
13.300000000000001
>>> 13.3-13
0.30000000000000071
>>> (13.3-13)*10-3
7.1054273576010019e-015

but why shouldn't Python do this instead?:

>>> 13.3
13.3
>>> 13.3-13
0.3
>>> (13.3-13)*10-3
7.1054273576e-015

These values will still roundtrip to the exact same internal 
representations. BTW, I didn't have to work too hard to figure out what 
that last value should be, the first is cut/paste from CPython, the 
second is what IronPython gives you.

I believe the claim is that using the full 17 digits ensures the round-
tripping works even if you serialise and deserialise on different 
systems, so perhaps we all pay a cost in our interactive sessions for 
something which should really be buried deep in IPC code.



From tim.arnold at sas.com  Fri Sep 21 10:49:53 2007
From: tim.arnold at sas.com (Tim Arnold)
Date: Fri, 21 Sep 2007 10:49:53 -0400
Subject: elementtree question
Message-ID: <fd0lmi$pm8$1@foggy.unx.sas.com>

Hi, I'm using elementtree and elementtidy to work with some HTML files. For 
some of these files I need to enclose the body content in a new div tag, 
like this:
<body>
  <div class="remapped">
   original contents...
  </div>
</body>

I figure there must be a way to do it by creating a 'div' SubElement to the 
'body' tag and somehow copying the rest of the tree under that SubElement, 
but it's beyond my comprehension.

How can I accomplish this?
(I know I could put the class on the body tag itself, but that won't satisfy 
the powers-that-be).

thanks,
--Tim Arnold




From bj_666 at gmx.net  Thu Sep 20 03:20:27 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 20 Sep 2007 07:20:27 GMT
Subject: Sets in Python
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
	<CeB*qHeVr@news.chiark.greenend.org.uk>
	<1190235483.412972.81280@v23g2000prn.googlegroups.com>
	<1190239608.835359.51150@22g2000hsm.googlegroups.com>
	<1190244370.741482.6540@y27g2000pre.googlegroups.com>
	<1190247922.835055.31950@y42g2000hsy.googlegroups.com>
	<1190259968.214528.158370@v29g2000prd.googlegroups.com>
Message-ID: <5lel9rF7r3c0U1@mid.uni-berlin.de>

On Thu, 20 Sep 2007 03:46:08 +0000, prikar20 wrote:

> On Sep 19, 5:25 pm, Mark Dickinson <dicki... at gmail.com> wrote:
>> On Sep 19, 7:26 pm, Karthik Gurusamy <kar1... at gmail.com> wrote:
>>
>> > If I did, a = [10, 20] and I did d[a]= 'foo', then a.append(30).
>> > If dict complains key error on d[a] now, I won't be surprised. If I do
>> > d[[10, 20, 30]], I will be surprised if it doesn't find the item. Of
>> > course, in today's behavior the above is syntax error.
>>
>> It sounds as though you're proposing something like the following:
>>
>> >>> k = mylist([1, 2])
>> >>> d = {k : 'test'}
>> >>> d[k]
>> 'test'
>> >>> k.append(3)
>> >>> d[k]
>>
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in <module>
>> KeyError: [1, 2, 3]
>>
>> So far, so good.  But how do you explain the following to a confused
>> newcomer?
>>
>> >>> d.keys()
>> [[1, 2, 3]]
>> >>> k in d.keys()
>> True
>> >>> k in d
>> False
>> >>> d[k]
>>
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in <module>
>> KeyError: [1, 2, 3]
>>
>> In other words, to repeat Sion Arrowsmith's question, what would you
>> expect d.keys() to return after a key of d has been modified?
> 
> In the new model, it should be the value at the time of addition.
> That is [1,2] (not [1,2,3]). This does mean a copy of key in
> maintained internally in the dict.

A copy!?  That has to be a deep copy.  Which would make `dict`\s alot
slower and use more memory.  Plus you can't store objects that can't be
copied anymore.  That doesn't sound like a good trade off to me.

Ciao,
	Marc 'BlackJack' Rintsch


From steve at REMOVE-THIS-cybersource.com.au  Sun Sep  9 08:59:41 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sun, 09 Sep 2007 12:59:41 -0000
Subject: unexpected behavior: did i create a pointer?
References: <46e106ab$0$36439$4fafbaef@reader5.news.tin.it>
	<46e11dfe$0$4517$9b4e6d93@newsspool3.arcor-online.net>
	<pan.2007.09.07.10.40.46@REMOVE.THIS.cybersource.com.au>
	<fbrdsm$5f3$01$1@news.t-online.com>
	<13e2jdobu2kqkf1@corp.supernews.com>
	<fbtl7i$um3$02$2@news.t-online.com>
	<13e4rno5qal6h4b@corp.supernews.com>
	<1189330200.935267.107970@19g2000hsx.googlegroups.com>
Message-ID: <13e7rhtqelbcb54@corp.supernews.com>

On Sun, 09 Sep 2007 02:30:00 -0700, Arnaud Delobelle wrote:

>> You know, maybe because I came to Python with no C experience, I never
>> had trouble with the "unexpected behaviour" that so confused the
>> original poster. It's just obvious.
> 
> The funny thing is that if the OP had thought of both 'a' and 'copyOfA'
> as C-like pointers then he wouldn't have been confused :)

You're almost certainly wrong. He would have written to ask why this 
doesn't do what he expects:

>>> x = 3
>>> y = x # x and y are both pointers to the same value
>>> x += 1
>>> print x == y # of course, they are pointers to the same value
False


Or why lower_list() works as expected, but lower_string() doesn't:


>>> def lower_list(L):
...     for i, x in enumerate(L):
...         L[i] = x.lower()
... 
>>> s = ['STRING']
>>> lower_list(s)
>>> print s == ['string']
True
>>> 
>>> def lower_string(s):
...     s = s.lower()
...
>>> s = "STRING"
>>> lower_string(s)
>>> print s == "string"
False


The "names in Python are pointers" analogy only gives you the right 
answer half the time. The "names in Python are names" analogy gives you 
the right answer ALL THE TIME, no exceptions.



-- 
Steven.


From richardlev at gmail.com  Mon Sep 17 00:33:14 2007
From: richardlev at gmail.com (Richard Levasseur)
Date: Mon, 17 Sep 2007 04:33:14 -0000
Subject: Python Unicode to String conversion
In-Reply-To: <1189962693.168033.258520@d55g2000hsg.googlegroups.com>
References: <1188600916.528901.189680@d55g2000hsg.googlegroups.com>
	<1188631034.968347.116170@d55g2000hsg.googlegroups.com>
	<1189962693.168033.258520@d55g2000hsg.googlegroups.com>
Message-ID: <1190003594.207618.314480@22g2000hsm.googlegroups.com>

> On 1 sep, 09:17, iapain <iap... at gmail.com> wrote:
>
> > First make sure your DB encoding is UTF-8 not the latin1
>

It took me days to figure out what was going on when dealing with
unicode, ascii, latin1, utf8, decodeerrors, etc, so I'm just chiming
in to echo something similar iapain's comments:

When dealing with unicode, i've run into situations where I have
multiple encodings in the same string, usually latin1 and utf8
(latin1 != ascii, and latin1 != utf8, and they don't play nice
together). So, for future readers, if you have problems dealing with
unicode encode and decode, try using a mix of latin1 and utf8
encodings to figure out whats going on, and what characters are
fubar'ing the process.



From filipe at ipb.pt  Wed Sep  5 11:40:23 2007
From: filipe at ipb.pt (Filipe Sousa)
Date: Wed, 05 Sep 2007 16:40:23 +0100
Subject: sqlite3.OperationalError: Could not decode to UTF-8 column
Message-ID: <fbmirn$4lp$1@cronus.fccn.pt>

Hi

I'm trying to use sqlite with python 2.5 but I have this problem:

Traceback (most recent call last):
   File "converter.py", line 13, in <module>
     c_old.execute('select id_aluno, nome from aluno')
sqlite3.OperationalError: Could not decode to UTF-8 column 'nome' with 
text 'Ana Margarida Fernandes Gon?alves de S?'

The database was created with another program and all data is in 
database is in latin1.

Thanks,
Filipe Sousa


From steve at REMOVE-THIS-cybersource.com.au  Wed Sep 19 20:32:29 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Thu, 20 Sep 2007 00:32:29 -0000
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<dea92f560709021735l2c72d53ew94410fcb33b9b50b@mail.gmail.com>
	<mailman.303.1188779927.28954.python-list@python.org>
	<1190164166.378500.155990@o80g2000hse.googlegroups.com>
	<13f2hctdoob87e5@corp.supernews.com>
	<1190225268.547042.55370@d55g2000hsg.googlegroups.com>
Message-ID: <13f3fsto5bo7i7e@corp.supernews.com>

On Wed, 19 Sep 2007 11:07:48 -0700, TheFlyingDutchman wrote:

> On Sep 19, 8:51 am, Steven D'Aprano <st... at REMOVE-THIS-
> cybersource.com.au> wrote:
>> On Tue, 18 Sep 2007 18:09:26 -0700, TheFlyingDutchman wrote:
>> > How much faster/slower would Greg Stein's code be on today's
>> > processors versus CPython running on the processors of the late
>> > 1990's?
>>
>> I think a better question is, how much faster/slower would Stein's code
>> be on today's processors, versus CPython being hand-simulated in a
>> giant virtual machine made of clockwork?
>>
>> --
>> Steven.
> 
> Steven, You forgot this part:
> 
> "And if you decide to answer, please add a true/false response to this
> statement - "CPython in the late 1990's ran too slow"'.


No, I ignored it, because it doesn't have a true/false response. It's a 
malformed request. "Too slow" for what task? Compared to what 
alternative? Fast and slow are not absolute terms, they are relative. A 
sloth is "fast" compared to continental drift, but "slow" compared to the 
space shuttle.

BUT even if we all agreed that CPython was (or wasn't) "too slow" in the 
late 1990s, why on earth do you imagine that is important? It is no 
longer the late 1990s, it is now 2007, and we are not using Python 1.4 
any more.



-- 
Steven.


From BjornSteinarFjeldPettersen at gmail.com  Wed Sep 26 00:53:35 2007
From: BjornSteinarFjeldPettersen at gmail.com (thebjorn)
Date: Wed, 26 Sep 2007 04:53:35 -0000
Subject: ANN: PyPE 2.8.7
In-Reply-To: <b0514$46f8e6fc$83aef404$21614@news1.tudelft.nl>
References: <mailman.1037.1190715307.2658.python-list@python.org>
	<f082a$46f8e4f1$83aef404$21115@news1.tudelft.nl>
	<b0514$46f8e6fc$83aef404$21614@news1.tudelft.nl>
Message-ID: <1190782415.470011.226800@w3g2000hsg.googlegroups.com>

On Sep 25, 12:46 pm, stef <s.mien... at id.umcn.nl> wrote:
> Another problem,
> I tried to run PyPE in my "old IDE",

instead of double-clicking on the PyPE.exe file? Why?

-- bjorn



From ptmcg at austin.rr.com  Sun Sep 30 16:49:41 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Sun, 30 Sep 2007 13:49:41 -0700
Subject: Create a string array of all comments in a html file...
In-Reply-To: <1191166775.660477.97840@o80g2000hse.googlegroups.com>
References: <1191166775.660477.97840@o80g2000hse.googlegroups.com>
Message-ID: <1191185381.347004.189530@50g2000hsm.googlegroups.com>

On Sep 30, 10:39 am, sophie_newbie <paulgeele... at gmail.com> wrote:
> Hi, I'm wondering how i'd go about extracting a string array of all
> comments in a HTML file, HTML comments obviously taking the format
> "<!-- Comment text here -->".
>
> I'm fairly stumped on how to do this? Maybe using regular expressions?
>
> Thanks.

>>> from pyparsing import htmlComment
>>> htmlComment.searchString("""<!-- Comment
... here -->And <i>so</i> funny!
... </p><!-- Comment <> -->""").asList()
[['<!-- Comment \nhere -->'], ['<!-- Comment <> -->']]

-- Paul





From pcooke at philc.net  Tue Sep  4 05:52:20 2007
From: pcooke at philc.net (PhilC)
Date: Tue, 04 Sep 2007 05:52:20 -0400
Subject: Applying transformation matrix to 3D vertex coordinates
References: <5rjod3lih4mnupjcm2184k5no15eodlc8r@4ax.com>
	<mailman.6.1188879923.2658.python-list@python.org>
Message-ID: <liaqd3pog1jc7ae9vj1vm95lq2d2v2s94d@4ax.com>

On Mon, 03 Sep 2007 23:24:42 -0500, Robert Kern
<robert.kern at gmail.com> wrote:

>transpose()


ahh yes I can see where that would work. Just tried it in the above
and I do get a last line of ones.

OK onward and upward :)

Many thanks Robert.


From torriem at chem.byu.edu  Sat Sep  1 15:37:29 2007
From: torriem at chem.byu.edu (Michael L Torrie)
Date: Sat, 01 Sep 2007 13:37:29 -0600
Subject: list index()
In-Reply-To: <1188495863.242815.236900@o80g2000hse.googlegroups.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>	<mailman.135.1188474634.28954.python-list@python.org>
	<1188495863.242815.236900@o80g2000hse.googlegroups.com>
Message-ID: <46D9BF79.6030000@chem.byu.edu>

zzbbaadd at aol.com wrote:
> In my case of have done os.listdir() on two directories. I want to see
> what files are in directory A that are not in directory B.
> I have used exceptions in other languages and only do so on logic that
> should never happen. In this case it is known that some of the files
> will not be in both lists. I just want to know which ones.
> 

What's wrong, then, with doing:

if i in list:
   print list.index(i)

Since if, as you proposed, list.index() returned some value to represent
 "not found", you'd require an if anyway.

This is probably not pythonic, but at least it would overcome your
exceptions excuse.

If we were to program this .index() method in some language that
enforces contracts, like haskell, then we'd say that .index() expects a
value that exists in the list.  So if you violate the contract, why
should you expect to *not* get an exception.  Doing it any other way,
though, makes the code a lot more error prone.



From grante at visi.com  Tue Sep  4 12:30:48 2007
From: grante at visi.com (Grant Edwards)
Date: Tue, 04 Sep 2007 16:30:48 -0000
Subject: How do I get triangles from a vtkPolyData object?
References: <13do9eh8dtqa236@corp.supernews.com>
	<13dquoa1r252o60@corp.supernews.com>
Message-ID: <13dr21opqrdrq4d@corp.supernews.com>

On 2007-09-04, Grant Edwards <grante at visi.com> wrote:
> On 2007-09-03, Grant Edwards <grante at visi.com> wrote:
>
> Is there _any_ documentation for the Python bindings to the vtk
> library?   I'm still beating my head against a wall trying to
> figure out how to get the actual data out of vtk objects when
> Python doesn't make visible the required "Get" methods....

I found a way to get at the object's "raw data" (a raw list of
floats) and parse out the cell/polygon information, but it's
bafflingly lame that Python doesn't make the normal "Get"
methods available so that one can actually retrieve the
individual cell elements of the vtkCellArray object.

-- 
Grant Edwards                   grante             Yow! All right, you
                                  at               degenerates!  I want
                               visi.com            this place evacuated in
                                                   20 seconds!


From Brad.Johnson at ballardtech.com  Tue Sep 18 20:17:09 2007
From: Brad.Johnson at ballardtech.com (Brad Johnson)
Date: Wed, 19 Sep 2007 00:17:09 +0000 (UTC)
Subject: Multiline command line parsing
Message-ID: <loom.20070919T020907-602@post.gmane.org>

I am implementing a Python command line from scratch in a Win32 application.

Examples online ("How do I tell incomplete input from invalid input" in the
Extending and Embedding Python FAQ) show how to implement this from scratch
using C code. The examples don't work.

This brief snippit illustrates the problem:

char* code = "class Foo:\n"
		"\tdef Bar():\n";
PyObject* temp = PyRun_String(code, Py_single_input, glb, loc);

The syntax is completely valid, but should return an "unexpected EOF while
parsing" (which I can handle). However, I receive "expected an indented block."

Shouldn't this example work as stated? Is there something I am missing about my
indentation technique, or any specific Win32 issues lurking?



From carl at personnelware.com  Thu Sep 20 21:26:47 2007
From: carl at personnelware.com (Carl K)
Date: Thu, 20 Sep 2007 20:26:47 -0500
Subject: looking for ocbc example
Message-ID: <LPGdnThcsrJMgG7bnZ2dnUVZ_uGknZ2d@comcast.com>

I am sure this is what I want:
http://www.python.org/topics/database/docs.html
"The documentation for the PythonWin ODBC module."

but it is 404.

google isn't being nice.

Anyone know where I can find some simple examples?

I have used odbc in other environments, so just need to know what modules, and 
the lines to connect and execute a sql command.

It seems there are 2 odbc modules - pyOdbc and mxOdbc - anyone know the difference?

Carl K


From junchi.tang at gmail.com  Thu Sep 20 12:47:24 2007
From: junchi.tang at gmail.com (Junchi Tang)
Date: Thu, 20 Sep 2007 11:47:24 -0500
Subject: os.path.getmtime() and compare with a date type
In-Reply-To: <46F29E2D.2040808@gmail.com>
References: <1190302285.127448.288010@22g2000hsm.googlegroups.com>
	<46F29E2D.2040808@gmail.com>
Message-ID: <8ee4d7a40709200947tf53ff9fub00302b30d02f6e2@mail.gmail.com>

Thanks, that works perfectly!

On 9/20/07, Anthony Greene <sysfault at gmail.com> wrote:
>
> junchi.tang at gmail.com wrote:
> > Hi,
> > I am new to python and are tryint to write a simple program delete log
> > files that are older than 30 days.
> >
> > So I used os.path.getmtime(filepath) and compare it with a date but it
> > does not compile.
> >
> > threshold_time = datetime.date.today() - datetime.timedelta(days=30)
> > mod_time = os.path.getmtime(file_path)
> >
> > if( mod_time < threshold_time):
> >          #delete file
> >
> > However the interpreter complains at the if line, say "can't comapre
> > datetime.date to int
> >
> > How can I covert one of them to make it work?
> >
> > Thank you!
> >
> >
> You are looking for datetime.datetime.fromtimestamp(mod_time)
>
-------------- next part --------------
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From jaywgraves at gmail.com  Fri Sep 21 06:41:20 2007
From: jaywgraves at gmail.com (jay graves)
Date: Fri, 21 Sep 2007 10:41:20 -0000
Subject: looking for ocbc example
In-Reply-To: <mailman.858.1190360593.2658.python-list@python.org>
References: <LPGdnThcsrJMgG7bnZ2dnUVZ_uGknZ2d@comcast.com>
	<mailman.858.1190360593.2658.python-list@python.org>
Message-ID: <1190371280.070392.55700@22g2000hsm.googlegroups.com>

On Sep 21, 2:43 am, Tim Golden <m... at timgolden.me.uk> wrote:
> Carl K wrote:
> > It seems there are 2 odbc modules - pyOdbc and mxOdbc - anyone know the difference?
>
> In short, pyodbc is open source; mxOdbc requires a commercial license.
> pyodbc is a newcomer, but appears to work for everything I've thrown
> at it (which is not much). mxOdbc has been around longer, and is sure
> to be a more mature product. It may offer more features & functionality.

There is also a brand new module 'ceODBC'.
http://ceodbc.sourceforge.net/

I haven't used it yet but I want to give it a try.

...
Jay



From timr at probo.com  Wed Sep 19 02:27:48 2007
From: timr at probo.com (Tim Roberts)
Date: Wed, 19 Sep 2007 06:27:48 GMT
Subject: Web Programming thru python
References: <1190027654.008396.326100@57g2000hsv.googlegroups.com>
Message-ID: <oif1f3dihnu9c5klgjmjm2madop1otk4je@4ax.com>

python_lover <govisathish at gmail.com> wrote:
>
>Please help how to execute a py file with xitami.
>
>I installed xitami , downloaded lrwp file.
>
>accessing the first web application program
>...
>through browser like "http://localhost/first.py
>
>it is dispaying the source code of the first.py.
>
>Please help me how to execute the file.

If you want this called as a CGI script, then you probably want this in the
cgi-bin directory.  You can use [Cgi-Alias] to make other directories into
CGI directories as well.

If you want ALL .py files to be executed, you should be able to create a
filter using Xitami's configuration stuff at http://localhost/admin.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From hvendelbo.dev at googlemail.com  Wed Sep 12 15:47:51 2007
From: hvendelbo.dev at googlemail.com (hvendelbo.dev at googlemail.com)
Date: Wed, 12 Sep 2007 19:47:51 -0000
Subject: pwdmodule.c
In-Reply-To: <KJ-dndPgqrVzrnXbnZ2dnUVZ_uDinZ2d@comcast.com>
References: <1189622437.459458.129390@57g2000hsv.googlegroups.com>
	<KJ-dndPgqrVzrnXbnZ2dnUVZ_uDinZ2d@comcast.com>
Message-ID: <1189626471.645309.259770@w3g2000hsg.googlegroups.com>

>
> http://mail.python.org/pipermail/python-dev/2007-July/073912.html

Thanks. I tried his files against trunk and it didn't work.



From Summercoolness at gmail.com  Tue Sep 18 01:40:57 2007
From: Summercoolness at gmail.com (Summercool)
Date: Tue, 18 Sep 2007 05:40:57 -0000
Subject: The meaning of  a = b  in object oriented languages
Message-ID: <1190094057.976729.285120@n39g2000hsh.googlegroups.com>




The meaning of  a = b  in object oriented languages.
====================================================

I just want to confirm that in OOP, if a is an object, then b = a is
only copying the reference.

(to make it to the most basic form:

a is 4 bytes, let's say, at memory location 0x10000000 to 0x10000003

b is 4 bytes, let's say, at memory location 0x20000000 to 0x20000003

in 0x10000000 to 0x10000003, it is the value 0xF0000000, pointing to
an object

b = a just means
copy the 4 bytes 0xF0 0x00 0x00 0x00 into 0x20000000 to 0x2000003
so that b now points to 0xF0000000 which is the same object.)


so essentially, a is just a pointer to an object.

and b = a just means that put that same pointer into b.

and that's why in Python or Ruby, it is like:

>>> a = {"a" : 1, "b" : 2}
>>> b = a
>>> a
{'a': 1, 'b': 2}
>>> b
{'a': 1, 'b': 2}
>>> a["a"] = 999
>>> a
{'a': 999, 'b': 2}
>>> b
{'a': 999, 'b': 2}

so most or all object oriented language do assignment by reference?
is there any object oriented language actually do assignment by
value?  I kind of remember in C++, if you do

Animal a, b;

a = b will actually be assignment by value.
while in Java, Python, and Ruby, there are all assignment by
reference.  ("set by reference")

Is that the case: if a is an object, then b = a is only copying the
reference?



From bj_666 at gmx.net  Thu Sep 27 13:54:23 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 27 Sep 2007 17:54:23 GMT
Subject: True of False
References: <1190910814.594559.30880@n39g2000hsh.googlegroups.com>
	<5m254hFatlbuU2@mid.uni-berlin.de>
	<Xns99B8B834EFB61duncanbooth@127.0.0.1>
Message-ID: <5m292fFatlbuU5@mid.uni-berlin.de>

On Thu, 27 Sep 2007 17:06:30 +0000, Duncan Booth wrote:

> Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:
> 
>> In [268]: 'c' in a == True
>> Out[268]: False
>> 
>> In [269]: ('c' in a) == True
>> Out[269]: True
>> 
>> In [270]: 'c' in (a == True)
>> -----------------------------------------------------------------------
>> ---- 
>><type 'exceptions.TypeError'>             Traceback (most recent call
>>last) 
>> 
>> /home/bj/<ipython console> in <module>()
>> 
>><type 'exceptions.TypeError'>: argument of type 'bool' is not iterable
>> 
>> 
>> What's going on there?
> 
> See http://docs.python.org/ref/comparisons.html
> 
>> Comparisons can be chained arbitrarily, e.g., x < y <= z is equivalent
>> to x < y and y <= z, except that y is evaluated only once (but in both
>> cases z is not evaluated at all when x < y is found to be false). 
> 
> In exactly the same way:
> 
>    'c' in a == True
> 
> is equivalent to:
> 
>    'c' in a and a == True
> 
> which is False.

Aaah *enlightenment*, I'm using this for range checks like in the docs,
but it wasn't obvious to me in this case.  Thanks.

Ciao,
	Marc 'BlackJack' Rintsch


From ricaraoz at gmail.com  Thu Sep  6 10:50:21 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Thu, 06 Sep 2007 11:50:21 -0300
Subject: Looping through File Question
In-Reply-To: <1188997229.977198.23100@22g2000hsm.googlegroups.com>
References: <1188989934.436165.213680@w3g2000hsg.googlegroups.com>	<1188992047.858695.174790@r34g2000hsd.googlegroups.com>	<1188995195.932117.111440@k79g2000hse.googlegroups.com>
	<1188997229.977198.23100@22g2000hsm.googlegroups.com>
Message-ID: <46E013AD.7050005@bigfoot.com>

John Machin wrote:
> On Sep 5, 10:26 pm, planetmatt <planetm... at gmail.com> wrote:
>> On 5 Sep, 12:34, John Machin <sjmac... at lexicon.net> wrote:
>>
>>
>>
>>> On Sep 5, 8:58 pm, planetmatt <planetm... at gmail.com> wrote:
>>>> I am a Python beginner.  I am trying to loop through a CSV file which
>>>> I can do.  What I want to change though is for the loop to start at
>>>> row 2 in the file thus excluding column headers.
>>>> At present I am using this statement to initiate a loop though the
>>>> records:
>>>> for line in f.readlines():
>>>> How do I start this at row 2?
>>> The quick answer to your literal question is:
>>>   for line in f.readlines()[1:]:
>>> or, with extreme loss of elegance, this:
>>>   for lino, line in enumerate(f.readlines()):
>>>       if not lino:
>>>           continue
>>> But readline and readlines are old hat, and you wouldn't want to read
>>> a file of a few million lines into a big list, so a better answer is:
>>>     _unused = f.next()
>>>     for line in f:
>>> But you did say you were reading a CSV file, and you don't really want
>>> to do your own CSV parsing, even if you think you know how to get it
>>> right, so best is:
>>>     import csv
>>>     rdr = csv.reader(f)
>>>     heading_row = rdr.next()
>>>     for data_row in rdr:
>>> HTH,
>>> John
>> Thanks so much for the quick response.  All working now.
>>
>> I had looked at the CSV module but when I ran into another problem of
>> trying to loop through all columns, I was given a solution in another
>> forum which used the readlines() method.
> 
> Antique advice which still left you doing the CSV parsing :-)
> 
>> I have looked at the CSV documentation but didn't see any mention of
>> heading_row or data_row.
> 
> Ummm ... 'heading_row' and 'data_row' are identifiers of the kind that
> you or I would need to make up in any language; why did you expect to
> find them in the documentation?
> 
>> Is there a definitive Python documentation
>> site with code examples like MS's MSDN?
> 
> The definitive Python documentation site is (I suppose) http://www.python.org/doc/
> 
> I don't know what "code examples like MS's MSDN" means. I avoid MSDN
> like I'd avoid a nurse carrying a bottle of Dettol and a wire
> brush :-)
> 
> Here's an example of sucking your data into a list of lists and
> accessing it columnwise:
> 
> rdr = csv.reader(f)
> whatever_you_want_to_call_the_heading_row = rdr.next()
> data = list(rdr)
> sum_col_5 = sum(float(row[5]) for row in data)
> print "The value in row 3, column 4 is", data[3][4]
> 
> HTH,
> John
> 

Given that you have a header row you could also do (untested):

rdr = csv.DictReader(f)
data = list(rdr)
sum_Value = sum(float(row['Value']) for row in data)
print "The value in row 3, column 'ColName' is", data[3]['ColName']

DictReader generates a list of dictionaries which take the keys from
your header row.




From steve at REMOVE-THIS-cybersource.com.au  Thu Sep 13 18:14:51 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Thu, 13 Sep 2007 22:14:51 -0000
Subject: newbie: self.member syntax seems /really/ annoying
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189666095.727426.135170@o80g2000hse.googlegroups.com>
	<1189685403.306218.13270@22g2000hsm.googlegroups.com>
	<13eigagsuk74l55@corp.supernews.com>
	<46e94623$0$30375$9b4e6d93@newsspool4.arcor-online.net>
	<13eiosgssjkt3dd@corp.supernews.com>
	<mailman.493.1189703676.2658.python-list@python.org>
Message-ID: <13ejdir657npk7a@corp.supernews.com>

On Thu, 13 Sep 2007 13:14:25 -0400, J. Clifford Dyer wrote:

> On Thu, Sep 13, 2007 at 04:21:36PM -0000, Steven D'Aprano wrote
> regarding Re: newbie: self.member syntax seems /really/ annoying:
>> 
>> It's not just a matter of taste.
>> 
>> Reading comprehensibility is an objective, measurable quantity, and I
>> would bet that "(self.foo + self.bar) * self.baz" would be measurably
>> more readable on average than either of your two alternatives _even for
>> those people who claim to hate it_.
>> 
>> 
> It may be measurable, but it is also contextual.  Depending on what
> you've been trained in, one way or the other might be more readable. 
> For a teenager in a major city, tagging is far more readable than a
> Fraktur font, but for Mad King Ludwig, it was certainly quite the
> opposite.

Cliff, we're discussing Python programming, not Java programming or 
assembly language programming or tagging trains. Let the damn taggers 
invent their own programming language and stop graffiti-ing Python.

And speaking of readability... your post shows up in my news reader with 
each paragraph as a single, long, long LONG line scrolling about five 
full screens to the right. Please configure your software to follow the 
Usenet convention of putting newline characters at the end of each line, 
or every 72 (?) characters, whichever comes first.

> Moreover, it may be that the best solution is to stop trying for an
> object-oriented solution.  Why not use a functional programming style to
> represent mathematical functions?

Go back to the beginning of the thread, and you'll see that that's just 
what I suggested.



-- 
Steven.


From bignose+hates-spam at benfinney.id.au  Wed Sep 12 21:11:56 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 13 Sep 2007 11:11:56 +1000
Subject: Coming from Perl
References: <Cv%Fi.198$372.59@read2.cgocable.net>
	<87wsuv5r83.fsf@benfinney.id.au>
	<lR%Fi.203$372.178@read2.cgocable.net>
Message-ID: <87myvr5pyb.fsf@benfinney.id.au>

Amer Neely <perl4hire at softouch.on.ca> writes:

> print <<EndHTML;
> <html>
> <body>
> Hello
> </body>
> </html>
> EndHTML

The equivalent in Python would be::

    print """
    <html>
    <body>
    Hello
    </body>
    </html>
    """

You can even use Python's standard textwrap module to indent your code
properly::

    import textwrap

    def foo(bar):
        if baz:
            print textwrap.dedent("""
                <html>
                <body>
                    Hello
                </body>
                </html>
                """)

The 'textwrap.dedent' function strips *common* leading whitespace from
all lines in the string, so in the above example the resulting string
will be as though the original string were typed flush to the left
margin.

See 'help(textwrap.dedent)' for what that function does, or read it
online <URL:http://docs.python.org/lib/module-textwrap>.

-- 
 \            "Madness is rare in individuals, but in groups, parties, |
  `\         nations and ages it is the rule."  -- Friedrich Nietzsche |
_o__)                                                                  |
Ben Finney


From cai.haibin at gmail.com  Wed Sep 26 01:14:38 2007
From: cai.haibin at gmail.com (james_027)
Date: Wed, 26 Sep 2007 05:14:38 -0000
Subject: %s shortcut?
In-Reply-To: <1190780264.426322.237690@g4g2000hsf.googlegroups.com>
References: <1190775317.062210.234400@g4g2000hsf.googlegroups.com>
	<1190780264.426322.237690@g4g2000hsf.googlegroups.com>
Message-ID: <1190783678.074965.33150@19g2000hsx.googlegroups.com>

hi bjorn,
> You could do [year]*12 + [order_by] like so:
>
> >>> [1970] * 12 + ['foo']
>
> [1970, 1970, 1970, 1970, 1970, 1970, 1970, 1970, 1970, 1970, 1970,
> 1970, 'foo']
>
>
>
> I don't know which database you're using, but the above doesn't look
> like SQL'92...
>

Thanks, it works!

I am using mysql 5, and it works (i am having a hard time with mysql's
SP, firebird is very easy and nice)


cheers,
james




From deets at nospam.web.de  Mon Sep 10 16:39:22 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 10 Sep 2007 22:39:22 +0200
Subject: Mac OSX sqlite problem.  Missing?
In-Reply-To: <1189455305.994439.107100@r34g2000hsd.googlegroups.com>
References: <1189455305.994439.107100@r34g2000hsd.googlegroups.com>
Message-ID: <5klocbF498ruU1@mid.uni-berlin.de>

ricardo.turpino at gmail.com schrieb:
> Hi,
> 
> I've installed Mac Python 2.5.  I'm running Mac OS X 10.4.10 on a
> Macbook 1.83GHz.  I though that the python sqlite library was
> installed by default as part of Mac Python 2.5, however, I still have
> a problem.
> 
> Sqlite does not appear to be my system:
> 
>>>> import sqlite
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> ImportError: No module named sqlite
> 
> I ran 'sudo easy_install pysqlite' which gave me the file
> 'pysqlite-2.3.5-py2.5-macosx-10.3-fat.egg', but no working pysqlite.
> 
> I then downloaded the source files and ran 'python ez_setup.py
> pysqlite==2.3.5', which told me 'Using /Library/Frameworks/
> Python.framework/Versions/2.5/lib/python2.5/site-packages/
> pysqlite-2.3.5-py2.5-macosx-10.3-fat.egg'
> 
> Still no working version of pysqlite.
> 
> Tried installing from source.  No problems appeared, but I still can't
> use pysqlite.
> 
> The reason I am trying to install pysqlite, is to use turbogears,
> which initially failed when I ran 'tg-admin sql create', it failed
> with 'import sqlite.  ImportError: No module named sqlite'.
> 
> Any ideas gratefully received.

Are you by any chance using the python 2.3 when issuing that import 
statement?

Diez


From bj_666 at gmx.net  Sat Sep 22 02:35:54 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 22 Sep 2007 06:35:54 GMT
Subject: Who can develop the following Python script into working
	application ?
References: <1190334828.210230.293980@50g2000hsm.googlegroups.com>
	<1190372423.768184.60080@19g2000hsx.googlegroups.com>
	<5lho31F84jgjU1@mid.uni-berlin.de>
	<1190419744.390216.19040@w3g2000hsg.googlegroups.com>
Message-ID: <5ljreaF8gic1U2@mid.uni-berlin.de>

On Fri, 21 Sep 2007 17:09:04 -0700, http://members.lycos.co.uk/dariusjack/
wrote:

> On Sep 21, 1:26 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
>> <snip/>
> Is Python not fit to a task of this kind ?

It is, and it should be quite simple.

> Is there no a library of Python free scripts to accomplish the above
> like many for javascripts ?
> I am asking just of curosity, as an author of this script didn't
> respond to my second request  to tell me how complicated is the
> problem and what made him not to write that script as a fully working
> version.
> 
> Is Python so difficult, complicated, even for experienced developers ?

What makes you think it is?

This group is about the Python programming language, discussing it and
helping people to learn it.  It seems that people here don't like fixing
code for free for people who are not interested in the language
themselves.  There are platforms like guru.com or rentacoder.com for such
assignments.

Ciao,
	Marc 'BlackJack' Rintsch


From Dolka1 at gmail.com  Sat Sep  1 21:11:45 2007
From: Dolka1 at gmail.com (goodol)
Date: Sun, 02 Sep 2007 01:11:45 -0000
Subject: [python-win32] How can I get the parentWindow.document object?
Message-ID: <1188695505.993750.180020@19g2000hsx.googlegroups.com>

hello everybody

i am trying to automatie IE using python, and i want to access at the
parentWindow.document object

the code is like this,

import win32com.client
import pythoncom
ie = win32com.client.Dispatch("InternetExplorer.Application")
doc=ie.Document.parentWindow.document

the code always failed. the error message is "pywintypes.com_error:
(-2147352567, ...."

How can i get the parentWindow.document object? what' the reason the
code failed?

Thanks in advance.



From trekker182 at gmail.com  Sat Sep 22 17:00:47 2007
From: trekker182 at gmail.com (Shawn Minisall)
Date: Sat, 22 Sep 2007 17:00:47 -0400
Subject: too many values with string.split
Message-ID: <46F5827F.6050002@gmail.com>

I'm trying to unpack a list of 5 floats from a list read from a file and 
python is telling me 5 variables are too many for the string.split 
statement.  Anyone have any other idea's?  NOTE: the only reason I 
convert it to a float instead of just leaving it as a string in the loop 
is because I have to have it printed out as a float besides the names 
and then the average displayed underneath

thx

    #read in data line by line
    for line in infile:
        mylist = string.split(line)
        firstName[counter] = mylist[0]
        lastName[counter] = mylist[1]
        grades[counter] = float(mylist[2])
        print firstName[counter], 
lastName[counter],":","\t\t",grades[counter]
        #increment counter
        counter = counter + 1

    #calculates and prints average score
    grades = str(grades)
    num1, num2, num3, num4, num5 = string.split(grades,",")
    average = float(num1 + num2 + num3 + num4 + num5) / 5
    print
    print "Average:"


From ldo at geek-central.gen.new_zealand  Sat Sep  1 02:45:36 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 01 Sep 2007 18:45:36 +1200
Subject: Automation and scheduling of FrontPage publishing using Python
References: <1188517723.279932.299400@x40g2000prg.googlegroups.com>
	<fbamnh$r7q$7@lust.ihug.co.nz>
	<mailman.250.1188620292.28954.python-list@python.org>
Message-ID: <fbb1lr$evf$5@lust.ihug.co.nz>

In message <mailman.250.1188620292.28954.python-list at python.org>, Steve
Holden wrote:

> Lawrence D'Oliveiro wrote:
>
>> In message <1188517723.279932.299400 at x40g2000prg.googlegroups.com>,
>> andrew.arobert at gmail.com wrote:
>> 
>>> We have numerous web sites which are currently being manually
>>> published via Front Page.
>>>
>>> Doing one or two sites on an ad-hoc basis was not too bad but we are
>>> now over 20 or thirty at set times during a business day.
>> 
>> Let me open the bidding by suggesting that you stop using FrontPage.
> 
> But that would mean reprogramming the functionality they now implement
> using FrontPage extensions. Any help with that?

If they were using FrontPage extensions, they deserve everything they get.


From exhuma at gmail.com  Wed Sep 19 03:00:49 2007
From: exhuma at gmail.com (exhuma.twn)
Date: Wed, 19 Sep 2007 00:00:49 -0700
Subject: Tutorial or Example (or Tutorial) of Using Canvas to Produce a
	Plot
In-Reply-To: <9ai0f39lejmjc2qbfcgo1t4h8b3e6ot9jd@4ax.com>
References: <phRHi.50851$Um6.35199@newssvr12.news.prodigy.net>
	<13evohih7rkd030@corp.supernews.com>
	<WPTHi.5906$FO2.4148@newssvr14.news.prodigy.net>
	<13f0b2qlvj5ige6@corp.supernews.com>
	<hnWHi.9038$z_5.1095@nlpi069.nbdc.sbc.com>
	<9ai0f39lejmjc2qbfcgo1t4h8b3e6ot9jd@4ax.com>
Message-ID: <1190185249.235840.263260@50g2000hsm.googlegroups.com>

On Sep 18, 11:58 pm, Richard Townsend <r... at nospam.com> wrote:
> On Tue, 18 Sep 2007 13:18:36 -0700, "W. Watson"
>
> <wolf_tra... at invalid.com> wrote:
> >Tk is it. I'm really not interested in the others at this point.
>
> John Grayson's book 'Python and Tkinter Programming' has a chapter on
> plotting Graphs and Charts. You can even download that chapter as a
> PDF file:
>
> http://www.manning-source.com/books/grayson/grayson_ch11.pdf
>
> Seehttp://www.manning.com/grayson/for more info about the book.

Also, if the graph is really all you need, matplotlib might be a very
interesting choice:
http://matplotlib.sourceforge.net/

It's got some user-interface facilities as well. But I never used
those so far.



From david at boddie.org.uk  Sat Sep 29 13:06:06 2007
From: david at boddie.org.uk (David Boddie)
Date: Sat, 29 Sep 2007 19:06:06 +0200
Subject: How to display a videostream in the PyQt GUI by a efficient way
Message-ID: <200709291906.08380.david@boddie.org.uk>

On Sat Sep 29 05:12:25 CEST 2007, kivilaya wrote:

>   As required, I need to get a videostream from a camera, and process
> every frame to add some information on it, and then display the frame
> in a PyQt GUI.
>   But I don't know how to display the videostream in the PyQt GUI by a
> efficient way.
> 
> Currently, I do these like this:
> 1. Get the videostream by the videocapture module (a useful module
> written by Markus Gritsch) in the format of  PIL images;

This sounds interesting. I wasn't aware of that module.

> 2. Process every PIL image and add the information;
> 3. Convert every PIL image to QPixmap and display it using
> QLabel.setPixmap.

This could be quite inefficient, though I think there's some support for
Qt's image classes in PIL these days.

> I think it is a very inefficient way, but I don't known how to display
> the videostream in other ways, so I need your help,  Thanks!
> 
> PS:I do it with Windows XP, Python 2.5.1, PyQt4.3.0

If you're using a commercially-licensed Qt library, you'll have access to
the ActiveQt classes that can be used to embed ActiveX controls:

  http://doc.trolltech.com/4.3/activeqt.html

Otherwise, you might find this recent thread on qt-interest to be of
interest:

  http://lists.trolltech.com/qt-interest/2007-09/msg00806.html

I also tried to document ways to do this on the PyQt/PyKDE Wiki:

  http://www.diotavelli.net/PyQtWiki/Multimedia_Resources

David


From resist_think at hushmail.com  Wed Sep  5 05:14:32 2007
From: resist_think at hushmail.com (resist_think at hushmail.com)
Date: Wed, 05 Sep 2007 12:14:32 +0300
Subject: 2 python questions!
Message-ID: <20070905091437.C7C09C3821@mailserver10.hushmail.com>



Hi python community!
First question has to do with threading support. There is the 
following simple case:
I have a dictionnary that gets it's values -which are url's-from a 
function. Sort of

dictionnary['1'] = "http://www.google.com"
dictionnary['2'] = "http://www.python.com"
....

I need to fill in the dictionnary with some url's. If I do it on 
the simplest way, it would be like:

for i in range(20):
   dictionnary["%s" % i] = get_urls(args)

and wait a long long time till it finishes. Can I do it easily with 
threads, without having to add too much code? Ideal case would be 
if all threads start simultaneously :)


Now the second question has to do with images retrieval and 
manipulation. Which libraries do you propose to work with to 
retrieve and resize images from the web? 


Thanks in advance for any help!
	

--
Handyman Franchises. Click Here.
http://tagline.hushmail.com/fc/Ioyw6h4fMyhGJzTqAUMT4o9Inh2I0NfM85HrFhPDGb7fSaLiZQZqWk/



From bignose+hates-spam at benfinney.id.au  Wed Sep 12 23:57:56 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 13 Sep 2007 13:57:56 +1000
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<87sl5j5r34.fsf@benfinney.id.au>
	<1189646281.569796.267940@d55g2000hsg.googlegroups.com>
	<87ir6f5mrq.fsf@benfinney.id.au>
	<1189651204.408268.57580@19g2000hsx.googlegroups.com>
Message-ID: <874phz5i9n.fsf@benfinney.id.au>

TheFlyingDutchman <zzbbaadd at aol.com> writes:

(Please, preserve attribution lines so it's clear who wrote what in
your quoted material.)

> >     >>> Foo.bar(foo, "spam")
> >     >>> foo.bar("spam")
> 
> That looks like a case of "There's more than one way to do it". ;)

Indeed, but there's only one *obvious* way to do it. (The latter, in
this case.)

> The first form is definitely consistent with the method declaration,
> so there's a lot to be said for using that style when teaching
> people to make classes -> send self, receive self.

Sure, go ahead and teach that way if you like; it'll work fine.

> I think I saw where Guido Van Rossum had referred to something as
> "syntactic sugar" in some python.org page. I am not familiar with
> sugar as related to syntax. Is it being used as a synonym for
> "easier way of doing it"?

Specifically an easier way of doing it provided by the language syntax
(hence "syntactic sugar"). As in, "the form 'foo += 1' is syntactic
sugar for 'foo = foo + 1'".

-- 
 \      "I don't know half of you half as well as I should like, and I |
  `\      like less than half of you half as well as you deserve."  -- |
_o__)                                                    Bilbo Baggins |
Ben Finney


From david at asdf.asdf  Tue Sep 11 21:57:14 2007
From: david at asdf.asdf (bambam)
Date: Wed, 12 Sep 2007 11:57:14 +1000
Subject: function to do dynamic import?
References: <13ecb84p1ghrd64@corp.supernews.com>
	<mailman.371.1189509653.2658.python-list@python.org>
Message-ID: <13eehrpbv5c3i2c@corp.supernews.com>


"J. Cliff Dyer" <jcd at sdf.lonestar.org> wrote in message 
news:mailman.371.1189509653.2658.python-list at python.org...
> bambam wrote:
>> import works in the main section of the module, but does
>> not work as I hoped when run inside a function.
>>
>> That is, the modules import correctly, but are not visible to
>> the enclosing (global) scope.
>>
>> Questions:
>> (1) Where can I read an explanation of this?
>> (2) Is there a work around?
>>
>> BTW, sys.modules("filename") shows that the module is
>> loaded, I just don't know how to use it when loaded that
>> way.  Also, if I import again at the global scope, the module
>> name becomes available.
>>
>> Steve.
>>
>> ---
>>
>>>>> def gim():
>>>>>
>> ... exec "import gamel"
>> ...
>>
> All you have done in this function is bind the module to the name gamel
> within the scope of the function.  As soon as the function exits, the
> module goes out of scope.  If you want to use it externally, return the
> module.
>
> def: gim():
>    import gamel
>    return gamel
>>>>> gim()
>>>>>
> This will have to change to
>
> gamel = gim()
>
> and the rest should work as expected.
>>>>> sys.modules["gamel"]
>>>>>
>> <module 'gamel' from 'c:\gamel.pyc'>
>>
>>>>> gamel
>>>>>
>> NameError: name 'gamel' is not defined
>>
>>>>> exec "import gamel"
>>>>> gamel
>>>>>
>> <module 'gamel' from 'c:\gamel.pyc'>
>>
>>
>>
>

 def: gim():
    import gamel
    return gamel

Unfortunately, it needs to do dynamic import: I can't list
all of the possible import modules because they are unknown
until runtime.

Steve. 




From steve at REMOVE-THIS-cybersource.com.au  Wed Sep 19 23:54:59 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Thu, 20 Sep 2007 03:54:59 -0000
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<dea92f560709021735l2c72d53ew94410fcb33b9b50b@mail.gmail.com>
	<mailman.303.1188779927.28954.python-list@python.org>
	<1190164166.378500.155990@o80g2000hse.googlegroups.com>
	<1190241711.344058.238380@57g2000hsv.googlegroups.com>
	<1190242799.954176.279440@22g2000hsm.googlegroups.com>
	<7xps0ew0a8.fsf@ruckus.brouhaha.com>
Message-ID: <13f3roj6gdfq6b7@corp.supernews.com>

On Wed, 19 Sep 2007 19:14:39 -0700, Paul Rubin wrote:

> We get cpu speed increases now through parallelism, not mhz.  Intel and
> AMD both have 4-core cpu's now and Intel has a 16-core chip coming. 
> Python is at a serious disadvantage compared with other languages if the
> other languages keep up with developments and Python does not.

I think what you mean to say is that Python _will be_ at a serious 
disadvantage if other languages keep up and Python doesn't. Python can't 
be at a disadvantage _now_ because of what happens in the future.

Although, with the rapid take-up of multi-core CPUs, the future is 
*really close*, so I welcome the earlier comment from Terry Reedy that 
Guido has said he is willing to make changes to the CPython internals to 
support multiprocessors, and that people have begun to investigate 
practical methods of removing the GIL (as opposed to just bitching about 
it for the sake of bitching).


> The platitude that performance doesn't matter

Who on earth says that? I've never heard anyone say that.

What I've heard people say is that _machine_ performance isn't the only 
thing that needs to be maximized, or even the most important thing. 
Otherwise we'd all be writing hand-optimized assembly language, and there 
would be a waiting line of about five years to get access to the few 
programmers capable of writing that hand-optimized assembly language.


> that programmer time is more valuable than machine time

Programmer time is more valuable than machine time in many cases, 
especially when tasks are easily parallisable across many machines. 
That's why your "comparatively wimpy site" preferred to throw extra web 
servers at the job of serving webpages rather than investing in smarter, 
harder-working programmers to pull the last skerricks of performance out 
of the hardware you already had.


> etc. is at best an excuse for laziness.

What are you doing about solving the problem? Apart from standing on the 
side-lines calling out "Get yer lazy behinds movin', yer lazy bums!!!" at 
the people who aren't even convinced there is a problem that needs 
solving?


> And more and more often, in the
> application areas where Python is deployed, it's just plain wrong.  Take
> web servers: a big site like Google has something like a half million of
> them.  Even the comparatively wimpy site where I work has a couple
> thousand.  If each server uses 150 watts of power (plus air
> conditioning), then if making the software 2x faster lets us shut down
> 1000 of them, 

What on earth makes you think that would be anything more than a 
temporary, VERY temporary, shutdown? My prediction is that the last of 
the machines wouldn't have even been unplugged before management decided 
that running twice as fast, or servicing twice as many people at the same 
speed, is more important than saving on the electricity bill, and they'd 
be plugged back in.


> the savings in electricity bills alone is larger than my
> salary.  Of course that doesn't include environmental benefits, hardware
> and hosting costs, the costs and headaches of administering that many
> boxes, etc.  For a lot of Python users, significant speedups are a huge
> win.

Oh, I wouldn't say "No thanks!" to a Python speed up. My newest PC has a 
dual-core CPU (no cutting edge for me...) and while Python is faster on 
it than it was on my old PC, it isn't twice as fast.

But Python speed ups don't come for free. For instance, I'd *really* 
object if Python ran twice as fast for users with a quad-core CPU, but 
twice as slow for users like me with only a dual-core CPU.

I'd also object if the cost of Python running twice as fast was for the 
startup time to quadruple, because I already run a lot of small scripts 
where the time to launch the interpreter is a significant fraction of the 
total run time. If I wanted something like Java, that runs fast once it 
is started but takes a LONG time to actually start, I know where to find 
it.

I'd also object if the cost of Python running twice as fast was for Guido 
and the rest of the Python-dev team to present me with their wages bill 
for six months of development. I'm grateful that somebody is paying their 
wages, but if I had to pay for it myself it wouldn't be done. It simply 
isn't that important to me (and even if it was, I couldn't afford it).

Now there's a thought... given that Google:

(1) has lots of money;
(2) uses Python a lot;
(3) already employs both Guido and (I think...) Alex Martelli and 
possibly other Python gurus;
(4) is not shy in investing in Open Source projects;
(5) and most importantly uses technologies that need to be used across 
multiple processors and multiple machines

one wonders if Google's opinion of where core Python development needs to 
go is the same as your opinion?



-- 
Steven.


From robert.kern at gmail.com  Thu Sep 13 12:23:22 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 13 Sep 2007 11:23:22 -0500
Subject: Extended slicing and Ellipsis - where are they used?
In-Reply-To: <1189699345.436400.233460@g4g2000hsf.googlegroups.com>
References: <1189699345.436400.233460@g4g2000hsf.googlegroups.com>
Message-ID: <fcbo63$liq$1@sea.gmane.org>

Rodney Maxwell wrote:
> The following are apparently legal Python syntactically:
>    L[1:3, 8:10]
>    L[1, ..., 5:-2]
> 
> But they don't seem to work on lists:
>>>> l = [0,1,2,3]
>>>> l[0:2,3]
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> TypeError: list indices must be integers
>>>> l[...]
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> TypeError: list indices must be integers
> 
> So where is this extended slicing used?

numpy for multidimensional arrays.

http://numpy.scipy.org/

-- 
Robert Kern

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



From teroV at nowhere.invalid  Fri Sep 28 15:54:40 2007
From: teroV at nowhere.invalid (TeroV)
Date: Fri, 28 Sep 2007 22:54:40 +0300
Subject: Bug with lists of pairs of lists and append()
In-Reply-To: <fdjj0o$2oit$1@ariadne.rz.tu-clausthal.de>
References: <fdjj0o$2oit$1@ariadne.rz.tu-clausthal.de>
Message-ID: <5_cLi.230301$5E1.185721@reader1.news.saunalahti.fi>

Gabriel Zachmann wrote:
> Well,
> 
> could some kind soul please explain to me why the following trivial code 
> is misbehaving?
> 
> 
> #!/usr/bin/python
> s = []
> l = [ 0 ]
> r = [0, 0]
> while r:
>     x = (l,r)
>     print x
>     s.append( x )
>     l.append( r.pop(0) )
> print s
> 
> 
> 
> The output I get is:
> 
> ([0], [0, 0])
> ([0, 0], [0])
> [([0, 0, 0], []), ([0, 0, 0], [])]
> 
> and the error is in the last line: the two pairs in the outer list are 
> identical and they should be equal to the pairs one the first and the 
> 2nd line, respectively! Shouldn't they?
> 
> I think I'm going nuts -- for the life of me I don't see what's going on 
> ...
> 
> Thanks a lot in advance for any insights, etc.
> 
> Best regards,
> Gabriel.

You didn't say what it is supposed to do.
But, does replacing line "x = (l, r)" with "x = l[:], r[:]" do the trick?

In the original code you do basically the same as this
 >>> a = []
 >>> b = [1,2]
 >>> a.append(b)
 >>> b.append(3)
 >>> a
[[1, 2, 3]]

HTH :)


From dotancohen at gmail.com  Mon Sep 10 16:47:00 2007
From: dotancohen at gmail.com (Dotan Cohen)
Date: Mon, 10 Sep 2007 23:47:00 +0300
Subject: Need a KDE app, where to find a coder?
Message-ID: <880dece00709101347y41f5fc88q1b22c3dcfe47dd44@mail.gmail.com>

I need an application, and I'd like it to be written in Python with QT
as I am a KDE user. I simply don't have the time to code it myself, as
I've been trying to find the time for half a year now.

What are some reputable websites for finding Python coders? If anyone
on the list wants the job, this is what I need:

I need a hierarchical list manager, similar to ListPro
(http://www.iliumsoft.com/site/lp/listpro.htm) which is the app that
I'm replacing. Specifically, I need the checkmark (boolen), item
(string), date, amount (int/100), and notes fields. As KDE is moving
to QT4 in December (with the release of KDE4) it would be best if the
app were coded with this in mind. As the application is for my own
personal use, I will try to maintain it with the little python that I
know, but I may need help along the way.

Thanks in advance.

Dotan Cohen


From nickel_and_dime_2death at yahoo.com  Wed Sep 19 03:14:24 2007
From: nickel_and_dime_2death at yahoo.com (nickel_and_dime_2death at yahoo.com)
Date: Wed, 19 Sep 2007 00:14:24 -0700
Subject: Troubleshooting installing new package
In-Reply-To: <mailman.494.1189707029.2658.python-list@python.org>
References: <mailman.494.1189707029.2658.python-list@python.org>
Message-ID: <1190186064.271030.219480@22g2000hsm.googlegroups.com>

On Sep 13, 8:10 pm, "Gheorghe Postelnicu"
<gheorghe.posteln... at gmail.com> wrote:
> Hi,
>
> I have Python 2.5 installed on WinXP and I am trying to install a new
> package. I ran thesetup.pybuild and I get the following message:
>
> C:\packages\reedsolomon-0.1>setup.pybuild
> running build
> running build_ext
> error: Python was built with Visual Studio 2003;
> extensions must be built with a compiler than can generate compatible binaries.
> Visual Studio 2003 was not found on this system. If you have Cygwin installed,
> you can try compiling with MingW32, by passing "-c mingw32" tosetup.py.
>
> I have Visual Studio 2005 Express (the free one) installed. Is there a
> way to specify an option to compile using that version of the
> compiler?
>
> Sorry for the silly question and thanks in advance for any helpful suggestions!
> --
> Gheorghe Postelnicu, PhD
> MGH, Harvard Medical School

Hello, newbee here. I was looking for other solutions to other
problems. However, in my research for building wxPython I read from
the docs/build.html concerning the WIN crowd ...
--
[quote] If you woudl rather use a different version of VisualStudio
keep in mind that you'll also have to build Python and any other
extension modules that you use with that compiler because a different
version of the C runtime library is used. The stock Python 2.4 and 2.5
executables are built with MSVC 7.1, and the same rules apply to it.[/
quote]

So... did you build your Python2.5?? or did you install the binaries??
It makes a big difference.



From steve at REMOVE-THIS-cybersource.com.au  Thu Sep  6 01:38:08 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Thu, 06 Sep 2007 05:38:08 -0000
Subject: Does shuffle() produce uniform result ?
References: <tooru_honda-1F800B.15385124082007@wvnews01.netvigator.com>
	<mailman.243.1187955760.32294.python-list@python.org>
	<tooru_honda-7C82D1.10432725082007@wvnews01.netvigator.com>
	<tooru_honda-58C552.20355225082007@wvnews01.netvigator.com>
	<tooru_honda-978B9E.11304526082007@wvnews01.netvigator.com>
	<slrnfdnojg.inr.apardon@rcpc42.vub.ac.be>
	<7xejhfbsjo.fsf@ruckus.brouhaha.com>
	<slrnfdpup6.inr.apardon@rcpc42.vub.ac.be>
	<7xabs39bin.fsf@ruckus.brouhaha.com>
	<13drijhfqlvlk96@corp.supernews.com>
	<7xwsv53dtw.fsf@ruckus.brouhaha.com>
Message-ID: <13dv4i0lrmsk15@corp.supernews.com>

On Tue, 04 Sep 2007 22:01:47 -0700, Paul Rubin wrote:

> OK.  /dev/random vs /dev/urandom is a perennial topic in sci.crypt and
> there are endless long threads about it there, so I tried to give you
> the short version, but will give a somewhat longer version here.

Thank you. Your points are taken, in particular:

> 4) The man page is fairly seriously bogus because it doesn't explain
>    the real situation with either /dev/urandom or /dev/random.



-- 
Steven.


From carsten at uniqsys.com  Thu Sep 20 15:55:15 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 20 Sep 2007 15:55:15 -0400
Subject: frange() question
In-Reply-To: <87tzppjhe4.fsf@pobox.com>
References: <fctrc1$doh$1@news.nems.noaa.gov>  <87tzppjhe4.fsf@pobox.com>
Message-ID: <1190318115.3392.63.camel@dot.uniqsys.com>

On Thu, 2007-09-20 at 18:55 +0000, John J. Lee wrote:
> Functions are never generators, senso stricto.  There are "generator
> functions", which *return* (or yield) generators when you call them.

Actually, a generator function is a function that returns a generator.
The generator, in turn, is an object that wraps the iterator protocol
around a resumable function. When the generator's next() method is
called, it resumes its wrapped function that runs until it yields or
finishes. When the wrapped function yields a value, it is suspended, and
the yielded value is returned as the result of next(). If the wrapped
function finished, next() raises StopIteration.

Generators are a special case of iterators. Any object that implements
the iterator protocol (which among other less important things mandates
a next() method that returns the next value or raises StopIteration) is
an iterator. Generators simply have their special way (by calling into a
resumable function) of implementing the iterator protocol, but any
stateful object that returns a value or raises StopIteration in next()
is an iterator.

> It's true sometimes people refer to generator functions as simply
> "generators", but in examples like the above, it's useful to remember
> that they are two different things.
> 
> In this case, frange isn't a generator function, because it doesn't
> yield.  Instead, it returns the result of evaluating a generator
> expression (a generator).  The generatator expression plays the same
> role as a generator function -- calling a generator function gives you
> a generator object; evaluating a generator expression gives you a
> generator object.  There's nothing to stop you returning that
> generator object, which makes this function behave just like a regular
> generator function.

Generator expressions still "yield", but you don't see the yield in the
Python source code. Observe:

>>> def gf1():
...   for i in (1,2,3):
...     yield i
... 
>>> def gf2():
...   return (i for i in (1,2,3))
... 
>>> g1 = gf1()
>>> g2 = gf2()
>>> g1
<generator object at 0xb7f66d8c>
>>> g2
<generator object at 0xb7f66f4c>
>>> dir(g1)
['__class__', '__delattr__', '__doc__', '__getattribute__', '__hash__',
'__init__', '__iter__', '__new__', '__reduce__', '__reduce_ex__',
'__repr__', '__setattr__', '__str__', 'close', 'gi_frame', 'gi_running',
'next', 'send', 'throw']
>>> dir(g2)
['__class__', '__delattr__', '__doc__', '__getattribute__', '__hash__',
'__init__', '__iter__', '__new__', '__reduce__', '__reduce_ex__',
'__repr__', '__setattr__', '__str__', 'close', 'gi_frame', 'gi_running',
'next', 'send', 'throw']
>>> import dis
>>> dis.dis(g1.gi_frame.f_code.co_code)
          0 SETUP_LOOP         19 (to 22)
          3 LOAD_CONST          4 (4)
          6 GET_ITER       
    >>    7 FOR_ITER           11 (to 21)
         10 STORE_FAST          0 (0)
         13 LOAD_FAST           0 (0)
         16 YIELD_VALUE    
         17 POP_TOP        
         18 JUMP_ABSOLUTE       7
    >>   21 POP_BLOCK      
    >>   22 LOAD_CONST          0 (0)
         25 RETURN_VALUE   
>>> dis.dis(g2.gi_frame.f_code.co_code)
          0 SETUP_LOOP         18 (to 21)
          3 LOAD_FAST           0 (0)
    >>    6 FOR_ITER           11 (to 20)
          9 STORE_FAST          1 (1)
         12 LOAD_FAST           1 (1)
         15 YIELD_VALUE    
         16 POP_TOP        
         17 JUMP_ABSOLUTE       6
    >>   20 POP_BLOCK      
    >>   21 LOAD_CONST          0 (0)
         24 RETURN_VALUE   

As you can see, except for a minor optimization in the byte code, there
is no discernible difference between the generator that's returned from
a generator expression and the generator that's returned from the
generator function. Note in particular that the byte code for g2
contains a YIELD_VALUE operation just like g1 does.

In fact, generator expressions are merely a short-hand notation for
simple generator functions of a particular form. The generator
expression

g = (expr(x) for x in some_iterable)

produces a generator that is almost indistinguishable from, and
operationally identical to, the generator produced by the following
code:

def __anonymous():
  for x in some_iterable:
    yield expr(x)
g = __anonymous()
del __anonymous

Hope this helps,

-- 
Carsten Haese
http://informixdb.sourceforge.net




From lasses_weil at klapptsowieso.net  Fri Sep  7 10:06:07 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Fri, 07 Sep 2007 16:06:07 +0200
Subject: Generating a unique identifier
In-Reply-To: <mailman.216.1189167281.2658.python-list@python.org>
References: <13e2fgbbpsatm39@corp.supernews.com>
	<mailman.216.1189167281.2658.python-list@python.org>
Message-ID: <46e15acf$0$16104$9b4e6d93@newsspool1.arcor-online.net>

Will Maier wrote:
> On Fri, Sep 07, 2007 at 12:03:23PM -0000, Steven D'Aprano wrote:
> [...]
>> which is easy enough, but I thought I'd check if there was an existing 
>> solution in the standard library that I missed. Also, for other 
>> applications, I might want them to be rather less predictable.
> 
> 2.5 includes the uuid module for RFC 4122 universally-unique IDs:
> 
>     http://docs.python.org/lib/module-uuid.html
> 
Jesus Christ! What in all the world *doesn't* Python do already?!

Can't we now just write up a module for the standard lib that takes care 
of writing all the other code as well and just forget about getting our 
hands dirty with programming altogether?

/W
(just in case: ;)!)


From richardjones at optushome.com.au  Sat Sep 29 22:55:19 2007
From: richardjones at optushome.com.au (Richard Jones)
Date: Sun, 30 Sep 2007 12:55:19 +1000
Subject: OSDC 2007 earlybird registration now open!
Message-ID: <200709301255.19262.richardjones@optushome.com.au>

[and now with more information]

The Open Source Developers' Conference is designed by open source developers, 
for developers and business people. It covers numerous programming languages 
across a range of operating systems, and related topics such as business 
processes, licensing, and strategy. Talks vary from introductory pieces 
through to the deeply technical.

Registration for OSDC Australia 2007 (26th to 29th November in Brisbane, 
Queensland( is now open at http://osdc.com.au/registration/

The earlybird price is $275 (until October 14th), after that the full 
conference price is $325. All regular tickets include the conference dinner!

Peruse the overview of confirmed sessions at:

http://www.cgpublisher.com/conferences/107/web/session_descriptions.html


OSDC 2007 is proud and grateful to have a group of global as well as local 
companies sponsoring this year's event:

  Apress, CNET/BuilderAU, Common Ground, Freeway/Zac-Ware, Google,  
  Linux Magazine, Opengear, Open Query, Rea Group, Red Hat, Sun  
  Microsystems, Trolltech, Woodslane.

Sponsorship opportunities are still available - please contact OSDC through 
their website http://osdc.com.au/


From gdamjan at gmail.com  Sun Sep 23 12:24:04 2007
From: gdamjan at gmail.com (Damjan)
Date: Sun, 23 Sep 2007 18:24:04 +0200
Subject: annoying stdin/stdout + pipes problem
References: <1190554821.677666.93530@w3g2000hsg.googlegroups.com>
Message-ID: <46f69324$0$90263$14726298@news.sunsite.dk>

> I want to create a program that reads input from stdio that can prompt
> a user for input while doing so without getting into problems.
...
> As you can see I have commented out what I'd like to do but do not
> know how to. Can I somehow halt the previous print to stdout (cat
> input.txt) - if so can I then start it again, and how?

The trick (which works on Linux for sure) is to open /dev/tty and ask
question/get input on/from it.

fp = open('/dev/tty', 'r+')
fp.write('Prompt: ')
answer = fp.readline().strip()


I'm not usre for other *nix-es, and on Windows this will surelly not work
-- 
damjan


From timr at probo.com  Wed Sep 12 23:17:26 2007
From: timr at probo.com (Tim Roberts)
Date: Thu, 13 Sep 2007 03:17:26 GMT
Subject: anybody has py modules emulating symbian 60 on PC?
References: <mailman.1141.1189478046.2656.python-list@python.org>
	<005f01c7f41d$cb9cfa80$4de1a8c0@amd.com>
	<mailman.376.1189512498.2658.python-list@python.org>
Message-ID: <ptahe31n6q3qnq4dkcnklfkdg9lb5617hn@4ax.com>

Steve Holden <steve at holdenweb.com> wrote:
> 
>http://archive.devx.com/wireless/vendordocs/nokia.asp might help. Or it 
>might not.

How utterly refreshing: a completely honest Usenet posting...
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From deets at nospam.web.de  Thu Sep 20 18:53:40 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 21 Sep 2007 00:53:40 +0200
Subject: I could use some help making this Python code run faster using
	only Python code.
In-Reply-To: <1190325588.608625.259800@q3g2000prf.googlegroups.com>
References: <1190325588.608625.259800@q3g2000prf.googlegroups.com>
Message-ID: <5lgc0fF85chjU1@mid.uni-berlin.de>

Python Maniac schrieb:
> I am new to Python however I would like some feedback from those who
> know more about Python than I do at this time.
> 
> def scrambleLine(line):
>     s = ''
>     for c in line:
>         s += chr(ord(c) | 0x80)
>     return s
> 
> def descrambleLine(line):
>     s = ''
>     for c in line:
>         s += chr(ord(c) & 0x7f)
>     return s

These might benefit from using a lookup-dictionary that maps ord(c) to 
the outcome of the operation. Actually, it becomes twice as fast:

import time

lt = {}
for i in xrange(255):
     lt[chr(i)] = chr(i | 0x80)

def scrambleLine(line):
     s = ''
     for c in line:
         s += chr(ord(c) | 0x80)
     return s

def scrambleLineLU(line):
     s = ''
     for c in line:
         s += lt[c]
     return s


if __name__ == "__main__":
     line = "abcdefghijklmnop" * 1000000
     start = time.time()
     scrambleLine(line)
     print time.time() - start

     start = time.time()
     scrambleLineLU(line)
     print time.time() - start



Diez



From steve at holdenweb.com  Thu Sep 27 20:33:47 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 27 Sep 2007 20:33:47 -0400
Subject: Importing Module To Use Variables In A Second Module
In-Reply-To: <slrnffohqr.17r.rshepard@salmo.appl-ecosys.com>
References: <slrnffo891.17r.rshepard@salmo.appl-ecosys.com>	<mailman.1192.1190931465.2658.python-list@python.org>
	<slrnffohqr.17r.rshepard@salmo.appl-ecosys.com>
Message-ID: <fdhi5c$c3b$1@sea.gmane.org>

rshepard at nospam.appl-ecosys.com wrote:
> On 2007-09-27, Steve Holden <steve at holdenweb.com> wrote:
> 
>> Self-evidently you are *not* creating the variables you think you are in
>> the variablePage module. Have you tried an interactive test? Try this at
>> the interpreter prompt:
>>
>>>>> import variablePage
>>>>> dir(variablePage)
>> and you will see exactly what names the module is defining in its 
>> namespace. You could also try
>>
>>>>> variablePage.__file__
>> to make sure that you are importing the module you think you are.
> 
> Steve,
> 
>   Many thanks.
> 
>   I _think_ the problem is that the wxPython objects are not instatiated
> when I'm trying to access the variables. Since they are instance variables,
> they just don't exist yet.
> 
>   Learning just when wxPython objects are instantiated is something I've
> just begun to do.
> 
> Rich

That could be. If they are instance variables, however, you will find 
you have to access them as

     variablePage.instancename.attributename

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From hassen62 at voila.fr  Sun Sep 16 20:52:43 2007
From: hassen62 at voila.fr (hassen62 at voila.fr)
Date: Mon, 17 Sep 2007 02:52:43 +0200 (CEST)
Subject: reading xls file using xlrd
Message-ID: <3555304.1120741189990363111.JavaMail.www@wwinf4624>

Hi,
I have installed Xlrd 0.6.1 Win 32. I have a file xls say "file.xls" located as follows:c:/file.xls. This file is composed with two columns of 5 lines. These columns are headed with "Col1" and "Col2", also the 5 rows are named with "Row1",...,"Row2".
I have a silly question: What I can do to read this file from The Shell?
Thank you very much,
Hassen.
-------------- next part --------------
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From andre.roberge at gmail.com  Thu Sep  6 18:36:40 2007
From: andre.roberge at gmail.com (=?iso-8859-1?B?QW5kcuk=?=)
Date: Thu, 06 Sep 2007 22:36:40 -0000
Subject: why should I learn python
In-Reply-To: <1189117798.506367.278560@y42g2000hsy.googlegroups.com>
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
	<LC_Di.8274$924.7987@newssvr23.news.prodigy.net>
	<1189117798.506367.278560@y42g2000hsy.googlegroups.com>
Message-ID: <1189118200.040934.151520@57g2000hsv.googlegroups.com>

On Sep 6, 7:29 pm, windandwaves <nfranc... at gmail.com> wrote:
> On Sep 7, 9:50 am, James Stroud <jstr... at mbi.ucla.edu> wrote:
>
> > Seewww.python.org. Trust us all when we say that its the best.
>
> I get that feeling - yes.  Question is:
>
> 1. what is it good for?

Pretty much any programming task, except perhaps those that require
extreme computation speed (like weather modeling).

> 2. why is it so good?

Easy to read, easy to write, good libraries and, I have found, an
extremely helpful community.

Hobbyists (like me) can work on projects written in Python on and off
(sometimes for weeks if not months without programming) and be able to
resume the work very quickly (because it's so easy to read and
understand the code).

Andr?

>
> I would love to hear some opinions.
>
> Cheers
>
> Nicolaas




From steve at holdenweb.com  Tue Sep 18 21:54:11 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 18 Sep 2007 21:54:11 -0400
Subject: Custom PYTHONPATH not being seen by -m
In-Reply-To: <1190158958.441168.307740@q3g2000prf.googlegroups.com>
References: <1190158958.441168.307740@q3g2000prf.googlegroups.com>
Message-ID: <fcpvg1$lp6$1@sea.gmane.org>

Vince Castellano wrote:
> Hello,
> 
> I am running RHEL5, with Python 2.4.3. I do not experience this
> problem on my other machines, which are 2.5.
> 
> The following should demonstrate my issue:
> 
> [16:38][vince:~]$ python -m srctools.symbol_replace -h
> python: module srctools.symbol_replace not found
> [16:40][vince:~]$ python
> Python 2.4.3 (#1, Dec 11 2006, 11:38:52)
> [GCC 4.1.1 20061130 (Red Hat 4.1.1-43)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import srctools.symbol_replace
>>>> srctools.symbol_replace
> <module 'srctools.symbol_replace' from '/usr/local/pymodules/srctools/
> symbol_replace.py'>
> [16:41][vince:~]$ echo $PYTHONPATH
> /usr/local/pymodules
> 
I suspect if you read "What's new in Python 2.5" you will find that the 
semantics of the -m option changed between the two releases. Let me see 
... right, here it is:

"""
The -m switch added in Python 2.4 to execute a module as a script gained 
a few more abilities. Instead of being implemented in C code inside the 
Python interpreter, the switch now uses an implementation in a new 
module, runpy.

The runpy module implements a more sophisticated import mechanism so 
that it's now possible to run modules in a package such as 
pychecker.checker. The module also supports alternative import 
mechanisms such as the zipimport module. This means you can add a .zip 
archive's path to sys.path and then use the -m switch to execute code 
from the archive.
"""

(from http://docs.python.org/whatsnew/pep-338.html).

In other words, 2.4 specifically didn't allow the command line import of 
package submodules.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From carsten at uniqsys.com  Mon Sep 24 06:19:12 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 24 Sep 2007 06:19:12 -0400
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <5lpgfuF95s07U3@mid.uni-berlin.de>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<mailman.900.1190414696.2658.python-list@python.org>
	<1190415741.380795.259050@y42g2000hsy.googlegroups.com>
	<mailman.904.1190418441.2658.python-list@python.org>
	<1190419720.811685.145880@r29g2000hsg.googlegroups.com>
	<46f6eb3d$0$32060$426a34cc@news.free.fr>
	<1190606861.982113.25240@d55g2000hsg.googlegroups.com>
	<46f786cc$0$8901$426a74cc@news.free.fr>
	<5lpgfuF95s07U3@mid.uni-berlin.de>
Message-ID: <1190629152.3385.2.camel@dot.uniqsys.com>

On Mon, 2007-09-24 at 10:05 +0000, Marc 'BlackJack' Rintsch wrote:
> On Mon, 24 Sep 2007 11:43:59 +0200, Bruno Desthuilliers wrote:
> 
> > You already can create functions without using the def statement:
> > 
> > Help on class function in module __builtin__:
> > 
> > class function(object)
> >   |  function(code, globals[, name[, argdefs[, closure]]])
> >   |
> >   |  Create a function object from a code object and a dictionary.
> >   |  The optional name string overrides the name from the code object.
> >   |  The optional argdefs tuple specifies the default argument values.
> >   |  The optional closure tuple supplies the bindings for free variables.
> >   |
> 
> Where the heck does *this* come from?  Neither Python 2.5.1 nor the
> 3.0alpha has this in `__builtin__`.

It comes from the 'new' module:

>>> import new
>>> help(new.function)
Help on class function in module __builtin__:
...

Oddly enough, the help misrepresents which module the function is coming
from.

-- 
Carsten Haese
http://informixdb.sourceforge.net




From ladynikon at gmail.com  Fri Sep 14 21:28:12 2007
From: ladynikon at gmail.com (Danyelle Gragsone)
Date: Fri, 14 Sep 2007 21:28:12 -0400
Subject: vi and python
In-Reply-To: <1189818866.523024.196320@g4g2000hsf.googlegroups.com>
References: <mailman.559.1189816527.2658.python-list@python.org>
	<1189818866.523024.196320@g4g2000hsf.googlegroups.com>
Message-ID: <59f9c5160709141828v554c37b6i564f444fd79633c6@mail.gmail.com>

Thanks for the link,

Apparently when I added python into my use list.  Python support was
added it :D.  I <3 gentoo.


From __peter__ at web.de  Wed Sep 12 11:35:53 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 12 Sep 2007 17:35:53 +0200
Subject: Get Only the Last Items in a Traceback
References: <1189562968.529414.27910@w3g2000hsg.googlegroups.com>
	<fc8aqq$3us$02$1@news.t-online.com>
	<1189609742.781671.143320@g4g2000hsf.googlegroups.com>
Message-ID: <fc910p$fmj$01$2@news.t-online.com>

Am Wed, 12 Sep 2007 15:09:02 +0000 schrieb gregpinero at gmail.com:

> On Sep 12, 5:17 am, Peter Otten <__pete... at web.de> wrote:
>>
>> Your assessment is wrong. You only get the extra lines in the traceback if
>> you don't immediately wrap the exec statement in a try ... except block:

>> $ cat snip_traceback3.py
>> import sys
>> import traceback
>>
>> def alpha():
>>     beta()
>>
>> def beta():
>>     gamma()
>>
>> def gamma():
>>     try:
>>         exec s in {}
>>     except Exception, e:
>>         etype, value, tb = sys.exc_info()
>>         traceback.print_exception(etype, value, tb.tb_next)
>>
>> s = """
>> def delta():
>>     epsilon()
>>
>> def epsilon():
>>     1/0
>> delta()
>> """
>>
>> if __name__ == "__main__":
>>     alpha()
>>
>> $ python snip_traceback3.py
>> Traceback (most recent call last):
>>   File "<string>", line 7, in <module>
>>   File "<string>", line 3, in delta
>>   File "<string>", line 6, in epsilon
>> ZeroDivisionError: integer division or modulo by zero
>>
>> Heureka.

> Thanks for the help, Peter.  That's exactly what I need.  

Indeed. But not exactly what you want, it seems.

> Now could I
> use your tb.tb_next trick a couple times and thus avoid moving the try/
> except?

Of course you can cut off the traceback at arbitrary positions. Here's an
example that uses the filename:

import traceback
import sys

def tb_filename(tb):
    return tb.tb_frame.f_code.co_filename

def tb_iter(tb):
    while tb is not None:
        yield tb
        tb = tb.tb_next

def alpha():
    try:
        beta()
    except Exception, e:
        etype, value, tb = sys.exc_info()
        filename = tb_filename(tb)
        for tb in tb_iter(tb):
            if tb_filename(tb) != filename:
                break
        traceback.print_exception(etype, value, tb)

def beta():
    gamma()

def gamma():
    exec s in {}

s = """ 
def delta():
    epsilon()
    
def epsilon():
    1/0
delta()
"""

if __name__ == "__main__":
    alpha()

Did I mention it already? It's better to move the try ... except.

Peter


From m.n.summerfield at googlemail.com  Fri Sep 14 03:12:48 2007
From: m.n.summerfield at googlemail.com (Mark Summerfield)
Date: Fri, 14 Sep 2007 07:12:48 -0000
Subject: An ordered dictionary for the Python library?
In-Reply-To: <1189733708.659317.83950@y42g2000hsy.googlegroups.com>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<7xzlzrtrjn.fsf@ruckus.brouhaha.com>
	<1189664832.876539.86800@k79g2000hse.googlegroups.com>
	<7xps0mmig9.fsf@ruckus.brouhaha.com>
	<1189733708.659317.83950@y42g2000hsy.googlegroups.com>
Message-ID: <1189753968.917636.310120@19g2000hsx.googlegroups.com>

On 14 Sep, 02:35, J?rgen Urner <jUr... at arcor.de> wrote:
> Puh, what a discussion... most common use case I can think of is
>
> >> d = {'a': 1, 'b': 2, 'c': 3}
> >> for key in d:
> >>     # do something that relies on order of keys as specified in the constructor
>
> It's a bit tireing having to type
>
> >> for key in sorted(d.keys()):
> >>     do_somethig_with(d[key])
>
> instead of a trustfully
>
> >> for value in d.values():
> >>     do_somethig_with(value)
>
> As far as I can see much cleaner. No black magic needed ++ sort the
> dict
> to another order and rely on the sort order being stable would be a
> really
> a nice thing to have.
>
> My 2 cents,  J?rgen

What I envisage is:

d = ordereddict(a=1, x=20, b=35, m=4)
# some time later
d["e"] = 15
# later still
d["b"] = 70
d.keys() # returns ['a', 'b', 'e', 'm', 'x']
d.values() # returns [1, 70, 15, 4, 20]

So no matter _when_ you add because the underlying data structure is
ordered (by key) you can always get access in key order. Also, you
can't "sort" the ordereddict; it is in key order and that's it. The
whole point is that you can use these things and never have to sort;
if you need different orders you create extra ordereddicts with
suitably munged keys and with values that are object references to the
objects you are interested in.

In reply to James Stroud:

- The reason you can't assign a slice is that the index positions
depend on the keys, so if you do:
    od[newkey] = newvalue
where newkey goes (i.e., its index position) depends on how it orders
in relation to the rest, so it could go "anywhere".
I now feel that offering a slice is wrong because the [] syntax is
used for access by key, whereas a slice would be for access by index,
so using [] for both would be v. confusing.

- James proposed better method names which I've adopted (see later),
but I don't think set_value() should be set() because that would make
it seem to be the partner of get(), whereas get() uses a key and
set_value() uses an index for lookup.

- James also suggested a name and behaviour change:

    keys(fromindex : int = None, uptobutexcludingindex : int = None) -
> ordered list of keys

So keys() called on its own behaves just like dict.keys() (except that
all the keys are returned in order), but with one argument returns the
keys with index positions from the given index to the end, and with
two arguments returns the keys in the given range of indexes. (Note:
in an ordereddict values() returns all the values in key order.)

So from the earlier example:

d.key(2) # returns 'e'
d.item(3) # returns ('m', 4)
d.value(4) # returns 20
d.set_value(3, 99) # maybe returns 'm'; but anyway d.value(3) and
d['m'] now both return 99

- James (and some others) also felt that insertions should just go as
key/value pairs at the end. But that is not what I'm proposing (that's
a completely different data structure).

The whole point of ordereddict is that whatever you insert and
whenever you insert it, the ordereddict is always in key order.

Paul Rubin and at least one other person mentioned the use of an AVL
tree. At the moment I just want to see if I can get enough consensus
on an API and behaviour so that I could put in a PEP for just one
ordered data structure.

So to clarify, here's the entire API I'm proposing for ordereddict. In
all cases the ordereddict is always in (and kept in) key order, and
any method that returns a list or iterator always returns that list or
iterator (whether of keys or values) in key order:

ordereddict(dictionary=None)
    The argument can be a dict or another ordereddict; all the dict()
initializer
    approaches should also be supported.

ordereddict.update(dictonary=None, **kwargs)
    Same as dict.update()---except that key order is preserved (a
point I won't
    repeat in the others when I say "same as dict", but which is true
throughout)

@classmethod
ordereddict.fromkeys(cls, iterable, value=None) # Same as dict

ordereddict.key(index : int) -> key
    Returns the index-th item's key

ordereddict.item(index : int) -> (key, value)
    Returns the index-th item

ordereddict.value(index : int) -> value
    Returns the index-th item's value

ordereddict.set_value(index : int, value)
    Sets the index-th item's value to value; raises IndexError if
index is out of
    range. If not expensive, maybe return the key.

ordereddict.copy() # Same as dict.
ordereddict.clear() # Same as dict.
ordereddict.get(key, value=None) # Same as dict
ordereddict.setdefault(key, value) # Same as dict
ordereddict.pop(key, value) # Same as dict
ordereddict.popitem() # Same as dict

ordereddict.keys(fromindex : int = None, uptoindex : int : None) ->
list of keys
    Returns an ordered list of keys, or a slice of keys if one or two
indexes is given

ordereddict.values() # Same as dict
ordereddict.items() # Same as dict
ordereddict.iterkeys() # Same as dict
ordereddict.itervalues() # Same as dict
ordereddict.iteritems() # Same as dict
ordereddict.has_key() # Same as dict

Also the same as dict (and as always, working in key order):

for key in d: pass
if key in d: pass
len(d)
del d[key]
d[key]
d[key] = value

What this means is that users could drop in an ordereddict in place of
a plain dict and get the same behaviour (maybe not the same
performance!), but would now find that they could rely on the ordering
of keys, as well as having just four additional methods and one
existing method with additional optional arguments.




From steve at holdenweb.com  Mon Sep 10 15:34:52 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 10 Sep 2007 15:34:52 -0400
Subject: Checking if elements are empty
In-Reply-To: <slrnfeauhp.14c.horpner@FIAD06.norwich.edu>
References: <2323A6D37908A847A7C32F1E3662C80E010A0246@dc1ex01.air.org>	<fbme5d$qa$1@sea.gmane.org>	<mailman.93.1189003016.2658.python-list@python.org>	<fbqedh$31g$1@lust.ihug.co.nz>	<46e115e5$0$7691$9b4e6d93@newsspool2.arcor-online.net>	<fbsqqs$efc$2@lust.ihug.co.nz>	<46e2013a$0$7687$9b4e6d93@newsspool2.arcor-online.net>	<slrnfead5j.mo.horpner@FIAD06.norwich.edu>	<mailman.321.1189434264.2658.python-list@python.org>	<slrnfeaoed.b4.horpner@FIAD06.norwich.edu>	<mailman.329.1189439834.2658.python-list@python.org>
	<slrnfeauhp.14c.horpner@FIAD06.norwich.edu>
Message-ID: <fc468r$fd4$1@sea.gmane.org>

Neil Cerutti wrote:
> On 2007-09-10, Chris Mellon <arkanes at gmail.com> wrote:
>> On 9/10/07, Neil Cerutti <horpner at yahoo.com> wrote:
>>> Agreed; but I prefer 'if y[0] == ""', absent more context and
>>> better names.
>> Probably should use u"" if you're going to take that route, as
>> this will fail spuriously if y[0] contains a unicode string
>> that can't be implicitly converted to ascii. Personally, I
>> prefer the boolean check and I'll let operations fail elsewhere
>> if there's a type mismatch.
> 
> I have a quibble not with the functionality of the boolean check,
> but with its expressiveness. if y[0] == "" expresses more, i.e.,
> that I expect y[0] to contain a Python byte string.
> 
I have a quibble with a test that will raise an exception when the 
anticipated condition is true. Your test is patently absurd, as you 
would have discovered had you bothered to try it:

 >>> y = ""
 >>> if y[0] == "":
...   print "True"
... else:
...   print "False"
...
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
IndexError: string index out of range
 >>>

Further, when the string is *not* the null string the test will always 
return False, as you will be comparing two strings of unequal length.

So, absent a solution that works, len(y) == 0 looks pretty good.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From zentraders at gmail.com  Thu Sep 13 21:14:59 2007
From: zentraders at gmail.com (Zentrader)
Date: Thu, 13 Sep 2007 18:14:59 -0700
Subject: Decimal formatting
In-Reply-To: <1189716651.810481.260850@y42g2000hsy.googlegroups.com>
References: <1189716651.810481.260850@y42g2000hsy.googlegroups.com>
Message-ID: <1189732499.480959.143760@g4g2000hsf.googlegroups.com>

The documentation is here
http://docs.python.org/lib/typesseq-strings.html



From arnodel at googlemail.com  Sat Sep  1 12:46:21 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Sat, 01 Sep 2007 09:46:21 -0700
Subject: nameerror upon calling function
In-Reply-To: <1188662744.345071.123610@57g2000hsv.googlegroups.com>
References: <1188662744.345071.123610@57g2000hsv.googlegroups.com>
Message-ID: <1188665181.459022.44520@o80g2000hse.googlegroups.com>

On Sep 1, 5:05 pm, seancron <seanc... at gmail.com> wrote:
> Hi,
>
> I have a program that makes a call to a function in a different python
> script that I wrote.  But, when I call the function I get the
> following error:
>
> NameError: global name 'WSDL' is not defined
>
> I can't figure out why I'm getting this error since WSDL should be
> defined. Here are the two scripts:
>
> weatherpy.py
> from xml.dom import minidom
> from SOAPpy import WSDL

The statement above needs to be in libndfdsoap.py, not here.

> from libndfdsoap import ByDaySOAPRequest
>
> wsdlfile = 'http://www.weather.gov/forecasts/xml/DWMLgen/wsdl/
> ndfdXML.wsdl'
>
> if __name__ == '__main__':
>     ByDaySOAPRequest(39.0000, -77.0000, 2004-04-27, 7, '12 hourly')
>
> libndfdsoap.py
> def ByDaySOAPRequest(latitude, longitude, startDate, numDays,
> hrFormat):
>     """Sends a SOAP request using the NDFDgenByDay method and stores
> the
>     response in a file called weather.xml"""
>
>     wsdlfile = 'http://www.weather.gov/forecasts/xml/DWMLgen/wsdl/
> ndfdXML.wsdl'
>     server = WSDL.Proxy(wsdlfile)
>     response = server.NDFDgenByDay(latitude, longitude, startDate,
> numDays,
>                                    hrFormat)
>     xml = open('/weather.xml', 'w')
>     xml.write(response)
>     xml.close()
>     return
>
> Can somebody please show me how to fix this error?

HTH

--
Arnaud




From cjt22 at bath.ac.uk  Mon Sep 10 11:48:58 2007
From: cjt22 at bath.ac.uk (cjt22 at bath.ac.uk)
Date: Mon, 10 Sep 2007 08:48:58 -0700
Subject: Using a time duration to print out data where every 2 seconds is
	a pixel
In-Reply-To: <1189436278.456311.128260@22g2000hsm.googlegroups.com>
References: <1189427545.322679.260970@r29g2000hsg.googlegroups.com>
	<slrnfeaips.m47.hat@se-162.se.wtb.tue.nl>
	<mailman.319.1189432713.2658.python-list@python.org>
	<1189436278.456311.128260@22g2000hsm.googlegroups.com>
Message-ID: <1189439338.572188.20690@o80g2000hse.googlegroups.com>

On Sep 10, 3:57 pm, cj... at bath.ac.uk wrote:
> Thanks however I am still having a problem using the time module for
> arithmetic
>
> My string times are of values such as 09:55:17
>
> and I have code such as:
>
> >from time import *
> >startPoint = strptime(step.sTime, "%H:%S:%M")
> >finishPoint = strptime(step.fTime, "%H:%S:%M")
> >duration = mktime(startPoint) - mktime(finishPoint)
>
> but it generates the error
>
> >OverflowError: mktime argument out of range
>
> Cheers

Perhaps I need to import the datetime module?



From BjornSteinarFjeldPettersen at gmail.com  Sat Sep 29 14:13:26 2007
From: BjornSteinarFjeldPettersen at gmail.com (thebjorn)
Date: Sat, 29 Sep 2007 11:13:26 -0700
Subject: Program inefficiency?
In-Reply-To: <mailman.1284.1191088565.2658.python-list@python.org>
References: <1191079347.192272.240540@22g2000hsm.googlegroups.com>
	<1191087234.915654.182370@k79g2000hse.googlegroups.com>
	<mailman.1284.1191088565.2658.python-list@python.org>
Message-ID: <1191089606.852125.276040@22g2000hsm.googlegroups.com>

On Sep 29, 7:55 pm, Pablo Ziliani <pa... at decode.com.ar> wrote:
> thebjorn wrote:
> > On Sep 29, 5:22 pm, hall.j... at gmail.com wrote:
>
> >> I wrote the following simple program to loop through our help files
> >> and fix some errors (in case you can't see the subtle RE search that's
> >> happening, we're replacing spaces in bookmarks with _'s)
> >> (...)
>
> > Ugh, that was entirely too many regexps for my taste :-)
>
> > How about something like:
>
> > def attr_ndx_iter(txt, attribute):
> >     (...)
> > def substr_map(txt, indices, fn):
> >     (...)
> > def transform(s):
> >     (...)
> > def zap_spaces(txt, *attributes):
> >     (...)
> > def mass_replace():
> >     (...)
>
> Oh yeah, now it's clear as mud.

I'm anxiously awaiting your beacon of clarity ;-)

> I do think that the whole program shouldn't take more than 10 lines of
> code

Well, my mass_replace above is 10 lines, and the actual replacement
code is a one liner. Perhaps you'd care to illustrate how you'd
shorten that while still keeping it "clear"?

> using one sensible regex

I have no doubt that it would be possible to do with a single regex.
Whether it would be sensible or not is another matter entirely...

> (impossible to define without knowing the real input and output formats).

Of course, but I don't think you can guess too terribly wrong. My
version handles upper and lower case attributes, quoting with single
(') and double (") quotes, and any number of spaces in attribute
values. It maintains all other text as-is, and converts spaces to
underscores in href and name attributes. Did I get anything majorly
wrong?

> And (sorry to tell) I'm convinced this is a problem for regexes, in
> spite of anybody's personal taste.

Well, let's see it then :-)

smack-smack'ly y'rs
-- bjorn



From robert.kern at gmail.com  Sat Sep 15 23:21:37 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 15 Sep 2007 22:21:37 -0500
Subject: how to join array of integers?
In-Reply-To: <13eoniohphkjs95@corp.supernews.com>
References: <1189859762.563599.269270@g4g2000hsf.googlegroups.com>	<a23effaf0709150551g19c611eqe1c912acf02306d3@mail.gmail.com>	<46EBE498.9040800@ehas.org>	<mailman.583.1189872945.2658.python-list@python.org>	<13eo1rb73mg8b77@corp.supernews.com>	<mailman.587.1189882295.2658.python-list@python.org>
	<13eoniohphkjs95@corp.supernews.com>
Message-ID: <fci7gd$5f1$1@sea.gmane.org>

Grant Edwards wrote:
> On 2007-09-15, Robert Kern <robert.kern at gmail.com> wrote:
>> Grant Edwards wrote:
>>> On 2007-09-15, Erik Jones <erik at myemma.com> wrote:
>>>
>>>>>> print ''.join([str(i) for i in [1,2,3]])
>>>>> It's better to use generator comprehension instead of LC:
>>>>>
>>>>> ",".join(str(i) for i in [1, 2, 3])
>>>> Why is that?  That entire expression must be evaluated to
>>>> obtain the result, so what is the advantage of using a
>>>> generator comprehension v. a list comprehension?
>>> The generator avoids creating the intermediate list -- it
>>> generates the intermediate values on the fly. For short
>>> sequences it probably doesn't matter much.  For a very long
>>> list it's probably noticable.
>> Not true. str.join() creates a list from the iterator if it is
>> not already a list or a tuple.
> 
> So the iterator avoids creating an intermediate list, but the
> join method goes ahead and does it anyway?

Yup.

>> In Objects/stringobject.c, look at string_join(); it calls
>> PySequence_Fast() on the argument. Looking in
>> Objects/abstract.c, we see that PySequence_Fast()
>> short-circuits lists and tuples but builds a full list from
>> the iterable otherwise.
> 
> So what's the point of iterables if code is going to do stuff
> like that when it wants to iterate over a sequence?

Some code dealing with sequences can be recast in terms of iterators of unknown
length. Some can't. Some are better cast in terms of iterators than sequences;
some aren't.

>> map() seems to reliably be the fastest option,
> 
> Which is apparently going away in favor of the slower iterator
> approach?

It's only slower in this case. Of course, the main difference is where the loop
takes place, in C or in Python. imap() appears to give the same performance as
map().

-- 
Robert Kern

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



From samsamrober at yahoo.com  Fri Sep 14 02:48:52 2007
From: samsamrober at yahoo.com (samsamrober at yahoo.com)
Date: Fri, 14 Sep 2007 06:48:52 -0000
Subject: IT News
Message-ID: <1189752532.909252.154580@50g2000hsm.googlegroups.com>

Hey watchout IT related News and Blog on www.itnewz.net



From deets at nospam.web.de  Tue Sep 11 02:13:04 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 11 Sep 2007 08:13:04 +0200
Subject: Need a KDE app, where to find a coder?
In-Reply-To: <mailman.339.1189457224.2658.python-list@python.org>
References: <mailman.339.1189457224.2658.python-list@python.org>
Message-ID: <5kmq00F4d2c9U2@mid.uni-berlin.de>

Dotan Cohen schrieb:
> I need an application, and I'd like it to be written in Python with QT
> as I am a KDE user. I simply don't have the time to code it myself, as
> I've been trying to find the time for half a year now.
> 
> What are some reputable websites for finding Python coders? If anyone
> on the list wants the job, this is what I need:
> 
> I need a hierarchical list manager, similar to ListPro
> (http://www.iliumsoft.com/site/lp/listpro.htm) which is the app that
> I'm replacing. Specifically, I need the checkmark (boolen), item
> (string), date, amount (int/100), and notes fields. As KDE is moving
> to QT4 in December (with the release of KDE4) it would be best if the
> app were coded with this in mind. As the application is for my own
> personal use, I will try to maintain it with the little python that I
> know, but I may need help along the way.

There are a few places to ask - like guru.com.

But you most probably will have to make a financial offer.

Apart from that - do you know basket? It's integrated into kontact, and 
maybe does what you want.

Diez


From gh at gregor-horvath.com  Fri Sep  7 07:41:07 2007
From: gh at gregor-horvath.com (Gregor Horvath)
Date: Fri, 07 Sep 2007 13:41:07 +0200
Subject: Class design (information hiding)
In-Reply-To: <fbr2gg$ipg$1@online.de>
References: <fbr2gg$ipg$1@online.de>
Message-ID: <42d6c$46e138d3$547078de$10495@news.chello.at>

Alexander Eisenhuth schrieb:
> 
> I'm wodering how the information hiding in python is ment. As I 
> understand there  doesn't exist public / protected / private  mechanism, 
> but a '_' and '__' naming convention.
> 
> As I figured out there is only public and private possible as speakin in 
> "C++ manner". Are you all happy with it. What does "the zen of python" 
> say to that design? (protected is useless?)

My favourite thread to this FAQ:

http://groups.google.at/group/comp.lang.python/browse_thread/thread/2c85d6412d9e99a4/b977ed1312e10b21#b977ed1312e10b21

Greg


From kbloom at gmail.com  Wed Sep 19 11:38:07 2007
From: kbloom at gmail.com (Ken Bloom)
Date: Wed, 19 Sep 2007 15:38:07 GMT
Subject: The meaning of a = b in object oriented languages
References: <1190094057.976729.285120@n39g2000hsh.googlegroups.com>
	<f517e32aa6ad5d39debdff7b6dc84685@ruby-forum.com>
	<1190098656.030658.66380@57g2000hsv.googlegroups.com>
	<_4OdnQm5joyO1m3bnZ2dnUVZ_tuonZ2d@comcast.com>
Message-ID: <pan.2007.09.19.15.31.35@gmail.com>

On Tue, 18 Sep 2007 18:02:59 -0400, Lew wrote:

> Summercool wrote:
>> when a writing or a book reads "a is a Hash object; a is an Array
>> object; or a is an Animal object" it is just a short form to say that
>> "a is a reference to that object."
>> 
>> b = a means "whatever a is referencing to, now b is referencing it
>> too".
>> 
>> so that's why  a[1] = "foobar"  will change what b will display, but a
>> = "foobar" will not change what b will display.
> 
> You can't do both in Java.  Is a an array or a String?  If a is a String
> and b is an array, then neither `a = b' nor `b = a' will compile in
> Java.
> 
> Java is a strongly-typed, compiled language which means it does more
> static type checking and thus would reject treating a as both an array
> and a String.
>   In that environment the programmer must choose one or the other.

In this Java example, a and b are statically typed to be of type Object. 
Both Strings and Arrays descend from Object. (And primatives like 
integers and the like will be autoboxed into descendants of Object).




-- 
Ken Bloom. PhD candidate. Linguistic Cognition Laboratory.
Department of Computer Science. Illinois Institute of Technology.
http://www.iit.edu/~kbloom1/


From joemystery123 at gmail.com  Thu Sep 20 15:33:31 2007
From: joemystery123 at gmail.com (joemystery123 at gmail.com)
Date: Thu, 20 Sep 2007 19:33:31 -0000
Subject: Python Regex Question
Message-ID: <1190316811.760038.145850@50g2000hsm.googlegroups.com>

I need to extract the number on each <td tags from a html file.

i.e 49.950 from the following:

<td align=right width=80><font size=2 face="New Times
Roman,Times,Serif">&nbsp;49.950&nbsp;</font></td>

The actual number between: &nbsp;49.950&nbsp; can be any number of
digits before decimal and after decimal.

<td align=right width=80><font size=2 face="New Times
Roman,Times,Serif">&nbsp;######.####&nbsp;</font></td>

How can I just extract the real/integer number using regex?



From andrew.arobert at gmail.com  Sun Sep  2 16:22:55 2007
From: andrew.arobert at gmail.com (andrew.arobert at gmail.com)
Date: Sun, 02 Sep 2007 20:22:55 -0000
Subject: Automation and scheduling of FrontPage publishing using Python
In-Reply-To: <1188701337.798785.188420@19g2000hsx.googlegroups.com>
References: <1188517723.279932.299400@x40g2000prg.googlegroups.com>
	<fbamnh$r7q$7@lust.ihug.co.nz>
	<mailman.250.1188620292.28954.python-list@python.org>
	<fbb1lr$evf$5@lust.ihug.co.nz>
	<mailman.255.1188630271.28954.python-list@python.org>
	<fbb3kv$jk5$1@lust.ihug.co.nz>
	<1188698223.393723.151140@d55g2000hsg.googlegroups.com>
	<1188701337.798785.188420@19g2000hsx.googlegroups.com>
Message-ID: <1188764575.438204.117420@r34g2000hsd.googlegroups.com>

On Sep 1, 10:48 pm, Jerry <jwe... at gmail.com> wrote:
> andrew,
>
> I would try looking into Windows automation with Python.http://www.google.com/search?q=windows+automation+pythonshould get
> you started.  The winGuiAuto package may help you out as it is like
> have a human click and move throughout the interface.  The only
> downside is that there is no recorder to help you build the script, so
> I would try to do as much in VBA as you can (does FrontPage even
> support VBA?) and then just write your python script to get through
> the program enough to execute the macro.

Yes.. Front page can be run by VB macro but I really did not want to
go down that road if it could be avoided.

This looks very promising.

I've installed the module and run a couple of the basic examples..

Very cool.



From bignose+hates-spam at benfinney.id.au  Thu Sep 13 05:32:37 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 13 Sep 2007 19:32:37 +1000
Subject: Coming from Perl
References: <Cv%Fi.198$372.59@read2.cgocable.net>
	<1189644803.816375.269950@y42g2000hsy.googlegroups.com>
	<b46Gi.221$372.100@read2.cgocable.net>
Message-ID: <87y7fa52ru.fsf@benfinney.id.au>

Amer Neely <perl4hire at softouch.on.ca> writes:

> Well, I have checked everything I can but I'm getting '500 Internal
> Server Error'.

This is the HTTP response code saying that the program that should
have served the response document instead exited with an error.

To debug, you should first run the program (or at least the part that
you're trying to implement) *outside* the context of a web server. Do
it at a command line, and any errors will show up as exception
tracebacks.

Only when you have something that performs correctly outside a web
server context should you consider how to wrap it in that new
(harder-to-debug) context.

-- 
 \        "What if the Hokey Pokey IS what it's all about?" ?anonymous |
  `\                                                                   |
_o__)                                                                  |
Ben Finney


From gagsl-py2 at yahoo.com.ar  Mon Sep 17 17:59:06 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 17 Sep 2007 18:59:06 -0300
Subject: qa
References: <46EEEE71.80108@gmail.com>
Message-ID: <op.tytjcs11x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 17 Sep 2007 18:15:29 -0300, Shawn Minisall <trekker182 at gmail.com>  
escribi?:

> I'm trying to get a space in between these two strings but it's ignoring
> the space in between when it prints.
>
>  >>> string.capwords (string.join([s1 + " " + s2])) * 3
> 'Spam Ni!Spam Ni!Spam Ni!'
>  >>>

It doesn't matter how many spaces you put in between, capwords will  
collapse all of them into a single space.

py> from string import capwords
py> help(capwords)
Help on function capwords in module string:

capwords(s, sep=None)
     capwords(s, [sep]) -> string

     Split the argument into words using split, capitalize each
     word using capitalize, and join the capitalized words using
     join. Note that this replaces runs of whitespace characters by
     a single space.

py> capwords("  hello      world    ")
'Hello World'
py> ' '.join([capwords("  hello      world    ")] * 3)
'Hello World Hello World Hello World'

Is that what you want?

-- 
Gabriel Genellina



From jbuturff at gmail.com  Mon Sep 24 10:34:37 2007
From: jbuturff at gmail.com (Horse)
Date: Mon, 24 Sep 2007 14:34:37 -0000
Subject: shutil.copy2 error
Message-ID: <1190644477.380312.261840@d55g2000hsg.googlegroups.com>

I've written a python script that copies a nightly Oracle backup file
to another server.  Every couple days, the script fails with this
error message:

Error copying Q:/Oradata/GISPROD/Backups/3UISN35R_1_1 to s:/gisprod/
backups/3UISN35R_1_1
[Errno 22] Invalid argument



Here's the code for the function I'm running.  The path names are all
correct, and it works *most of the time*.  It only fails about once or
twice a week.  Anyone know where I can get more info on this "errno 22
invalid argument"?


def CopyNewFiles(SOURCE_DIR, DEST_DIR):
    global STATUS
    try:
        os.chdir(SOURCE_DIR)
        for x in os.listdir(SOURCE_DIR):
            int_time = os.stat(x)[stat.ST_CTIME]
            str_time = time.ctime(int_time)
            if datetime.date.fromtimestamp(int_time + 0.00) >
YESTERDAY:
                try:
                    DEST_FILE = os.path.join(DEST_DIR, x)
                    logfile.write("     Copying " + SOURCE_DIR + x + "
to " + DEST_FILE + "\n")
                    logfile.flush()
                    if not os.path.isfile(DEST_FILE):
                        shutil.copy2(x, DEST_FILE)
                    else:
                        logfile.write("        File exists.  Skipping.
\n")
                        logfile.flush()
                except (IOError, os.error), why:
                    logfile.write("\n\nError copying " + SOURCE_DIR +
x + " to " + DEST_FILE + "\n\n")
                    logfile.write("\n" + str(why) + "\n")
                    logfile.flush()
                    STATUS = "FAILED"
    except:
        logfile.write("\n\nUnhandled error in CopyNewFiles\n\n")
        logfile.write("SOURCE_DIR = " + SOURCE_DIR + "\n")
        logfile.write("DEST_DIR = " + DEST_DIR + "\n")
        logfile.flush()
        STATUS = "FAILED"



From stodge at gmail.com  Mon Sep 17 12:01:58 2007
From: stodge at gmail.com (Stodge)
Date: Mon, 17 Sep 2007 09:01:58 -0700
Subject: Saving parameters between Python applications?
In-Reply-To: <46ee8be6$0$14822$426a74cc@news.free.fr>
References: <1189969538.830532.98840@g4g2000hsf.googlegroups.com>
	<46ee8be6$0$14822$426a74cc@news.free.fr>
Message-ID: <1190044918.623773.215920@50g2000hsm.googlegroups.com>

You're probably right!

Thanks all. :)

On Sep 17, 10:15 am, Bruno Desthuilliers <bruno.
42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> Stodge a ?crit :
>
>
>
> > I'm trying to do the following. I have a Python application that is
> > run:
>
> > python app1.py --location=c:\test1
>
> > What I want to do is save the location parameter, so I can then do (in
> > the same window):
>
> > python app2.py
>
> > And have app2.py automatically have access to the value of "location".
>
> > Now, the difficult part is, that in another window I want to do:
>
> > python app1.py --location=c:\test2
> > python app2.py
>
> > And have app2.py automatically get c:\test2 as the location. So the
> > two windows (consoles) are isolated from each other.
>
> > I thought I could use os.environ, but that doesn't save the variable
> > for applications that are run afterwards in the same window.
>
> > Any suggestions?
>
> Yes : pass the same arg to both app1.py and app2.py !-)
>
> Braindead, I know, but still the simplest solution.




From jgardner.jonathangardner.net at gmail.com  Thu Sep  6 18:06:56 2007
From: jgardner.jonathangardner.net at gmail.com (Jonathan Gardner)
Date: Thu, 06 Sep 2007 22:06:56 -0000
Subject: why should I learn python
In-Reply-To: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
Message-ID: <1189116416.737240.31230@r34g2000hsd.googlegroups.com>

On Sep 6, 2:32 pm, windandwaves <nfranc... at gmail.com> wrote:
> Can someone tell me why I should learn python?  I am a webdeveloper,
> but I often see Python mentioned and I am curious to find out what I
> am missing out on.

The reason I use Python is because I get more done quicker with fewer
bugs. I used to be a huge perl fan after being a huge C/C++ fan, and
Python is where I am right now and have been for the past 6 or more
years.




From cjt22 at bath.ac.uk  Wed Sep  5 08:55:19 2007
From: cjt22 at bath.ac.uk (cjt22 at bath.ac.uk)
Date: Wed, 05 Sep 2007 05:55:19 -0700
Subject: Accessing Module variables from another Module
In-Reply-To: <46de9f7f$0$30604$426a34cc@news.free.fr>
References: <1188981521.735630.133060@r29g2000hsg.googlegroups.com>
	<46de9f7f$0$30604$426a34cc@news.free.fr>
Message-ID: <1188996919.321965.262830@k79g2000hse.googlegroups.com>

On Sep 5, 1:22 pm, Bruno Desthuilliers <bruno.
42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> cj... at bath.ac.uk a ?crit :
>
> > Hi
>
> > I am new to Python (I have come from a large background of Java) and
> > wondered if someone could explain to me how I can access variables
> > stored in my main module to other functions within other modules
> > called
> > from this module
>
> (snip code)
> > I am currently just passing the variable in as a parameter
>
> And this is the RightThing(tm) to do.
>
> > but I thought with Python there would be a way to gain direct access
> > to
> > storeList within the modules called from the top main module?
>
> Yes : passing it as a param !-)
>
> For other modules to get direct access to main.storeList, you'd need
> these modules to import main in these other modules, which would
> introduce circular dependencies, which are something you usuallay don't
> want. Also, and while it's ok to read imported modules attributes, it's
> certainly not a good idea to mutate or rebind them IMHO, unless you're
> ok with spaghetti code.

Cheers Bruno, I just wanted to make sure I was being consistent with
the "Python way of things" :)



From byte8bits at gmail.com  Wed Sep 26 09:06:54 2007
From: byte8bits at gmail.com (byte8bits at gmail.com)
Date: Wed, 26 Sep 2007 06:06:54 -0700
Subject: Script to extract text from PDF files
In-Reply-To: <fdcfik$brq$2@lust.ihug.co.nz>
References: <fdbh95$smc$1@solaris.cc.vt.edu>
	<1190746968.162359.39890@r29g2000hsg.googlegroups.com>
	<1190747931.415834.75670@n39g2000hsh.googlegroups.com>
	<fdcfik$brq$2@lust.ihug.co.nz>
Message-ID: <1190812014.319333.104720@22g2000hsm.googlegroups.com>

On Sep 25, 10:19 pm, Lawrence D'Oliveiro <l... at geek-
central.gen.new_zealand> wrote:

> > Doesn't work that well...
>
> This is inherent in the nature of PDF: it's a page-description language, not
> a document-interchange language. Each text-drawing command can put a block
> of text anywhere on the page, so you have no idea, just from parsing the
> PDF content, how to join these blocks up into lines, paragraphs, columns
> etc.

So (I'm not being a wise guy) how does pdftotext do it so well? The
text I can extract from PDFs is extracted as it appears in the doc.
Although there are various ways to insert and encode text in PDFs,
it's also well documented in the PDF specifications (http://
www.adobe.com/devnet/pdf/pdf_reference.html). Going back to
pdftotext... it works well at extracting text from PDF. I'd like a
native Python library that does the same. This can be done. And, it
can be done in Python. I've made a small start, my hope was that
others would be interested in helping, but I can do it on my own
too... it'll just take a lot longer :)

Brad





From frank at chagford.com  Wed Sep 12 09:28:01 2007
From: frank at chagford.com (Frank Millman)
Date: Wed, 12 Sep 2007 06:28:01 -0700
Subject: Is the wxPython list down?
In-Reply-To: <1189602607.803546.180320@w3g2000hsg.googlegroups.com>
References: <1189602607.803546.180320@w3g2000hsg.googlegroups.com>
Message-ID: <1189603681.292154.186620@o80g2000hse.googlegroups.com>

On Sep 12, 3:10 pm, kyoso... at gmail.com wrote:
> Hi,
>
> Does anyone know if the wxPython mailing list is having issues? I
> subscribe to it and haven't seen anything come through since
> 09/06/2007. I went to ActiveState's archives and the last message
> there is from the 7th (http://aspn.activestate.com/ASPN/Mail/Browse/
> Threaded/wxPython-users).
>
> Thanks,
>
> Mike

This is from the wxPython home page -

"(8-Sept-2007) Yes, the mail lists are down. There were multiple disk
failures in RAID5 array of the machine that hosts the mail lists. The
hardware has been replaced and data is being restored from tape
backups."

I noticed that cvs seems to be down as well - maybe it was on the same
server.

Frank



From techrecruit07 at hotmail.com  Sun Sep  9 00:13:40 2007
From: techrecruit07 at hotmail.com (TechRecruit Consultants)
Date: Sat, 08 Sep 2007 21:13:40 -0700
Subject: req.in Unix/SQL/Oracle/JAVA - Work Location US
Message-ID: <1189311220.567843.134390@o80g2000hse.googlegroups.com>

Hi

Greets!

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Operaitons - Recruitment.

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Head Operations - Recruitment
TechRecruit Consultants,
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From tim.couper at scivisum.co.uk  Sat Sep  1 07:34:59 2007
From: tim.couper at scivisum.co.uk (Tim Couper)
Date: Sat, 01 Sep 2007 12:34:59 +0100
Subject: So what exactly is a complex number?
In-Reply-To: <46D944C8.6090802@wp.pl>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>	<mailman.212.1188576194.28954.python-list@python.org>	<451mq4-les.ln1@ozzie.tundraware.com>
	<46D944C8.6090802@wp.pl>
Message-ID: <46D94E63.8050701@scivisum.co.uk>

"... I'd hazard a guess you were educated in the USA where doing without understanding has been mastered by teachers and students alike. You're explanation ... """

Grzegorz

I think that this is unnecessarily offensive both to the poster and to the many teachers and students of quality in the USA. Maybe it wouldn't be so offensive in Poland, but in the world of first-language English speakers, it is.

Tim "European" Couper

Dr Tim Couper
CTO, SciVisum Ltd

www.scivisum.com



Grzegorz S?odkowicz wrote:
>> Here is a simple explanation (and it is not complete by a long shot).
>>
>> A number by itself is called a "scalar".  For example, when I say,
>> "I have 23 apples", the "23" is a scalar that just represents an
>> amount in this case.
>>
>> One of the most common uses for Complex Numbers is in what are
>> called "vectors".  In a vector, you have both an amount and
>> a *direction*.  For example, I can say, "I threw 23 apples in the air
>> at a 45 degree angle".  Complex Numbers let us encode both
>> the magnitude (23) and the direction (45 degrees) as a "number".
>>
>> There are actually two ways to represent Complex Numbers.
>> One is called the "rectangular" form, the other the "polar"
>> form, but both do the same thing - they encode a vector.
>>
>> Complex Numbers show up all over the place in engineering and
>> science problems.  Languages like Python that have Complex Numbers
>> as a first class data type allow you do to *arithmetic* on them
>> (add, subtract, etc.).  This makes Python very useful when solving
>> problems for engineering, science, navigation, and so forth.
>>
>>
>> HTH,
>>   
>>     
> You're mixing definition with application. You didn't say a word about 
> what complex numbers are, not a word about the imaginary unit, where 
> does it come from, why is it 'imaginary' etc.  Since we're being arses 
> here I'd hazard a guess you were educated in the USA where doing without 
> understanding has been mastered by teachers and students alike. You're 
> explanation of what vectors are is equally bogus but this has already 
> been pointed out. I'd also like to see a three-dimensional vector 
> represented by a complex number.
>
> Besides, I find Wikipedia extremely unhelpful for learning maths, partly 
> beacuse of it's non-linear nature (while reading an article you come 
> across a term you don't know, follow a link, then follow three others 
> and over the next 4 hours you find out lots of interesting things which 
> are sadly at best tangential to the initial subject) and because it's 
> written by people who already know a lot about the subject and take many 
> things for granted. This seems to be a decent introduction: 
> http://www.ping.be/~ping1339/complget.htm
>
> Regards,
> Greg
>   


From steve at holdenweb.com  Wed Sep 19 08:25:43 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 19 Sep 2007 08:25:43 -0400
Subject: HTTP Protocol Client
In-Reply-To: <1190196708.261138.233490@e9g2000prf.googlegroups.com>
References: <1190196708.261138.233490@e9g2000prf.googlegroups.com>
Message-ID: <fcr4g3$n21$2@sea.gmane.org>

welcomestocontact at gmail.com wrote:
>  Hi,
> 
> I am writing http protocol to get some data from servers. If i was
> using my localhost, getting replay from local and if want access other
> remote sites, i am getting error. Please reply it
> 
> My localhost client script:::
> 
> Code: ( python )
> 
> 
> import httplib
> 
> h = httplib.HTTP('localhost',80)
> 
> h.putrequest('GET','')
> 
> h.putheader('User-Agent','Lame Tutorial Code')
> 
> h.putheader('Accept','text/html')
> 
> h.endheaders()
> 
> errcode,errmsg, headers = h.getreply()
> 
> print errcode,errmsg, headers
> 
> 
> f = h.getfile() # Get file object for reading data
> 
> data = f.read()
> 
> print data
> 
> f.close()
> 
> 
> 
> 
> 
> the Reply getting from this::::
> 
> 
> 403 Forbidden Date: Tue, 18 Sep 2007 05:20:36 GMT
> 
> Server: Apache/2.0.52 (Red Hat)
> 
> Accept-Ranges: bytes
> 
> Content-Length: 3985
> 
> Connection: close
> 
> Content-Type: text/html; charset=UTF-8
> 
> And some Html script
> 
> 
> 
> 
> If I want to access other sites:::
> 
> 
> import httplib
> 
> h = httplib.HTTP('http://Google.com',80)
> 
> h.putrequest('GET','')
> 
> h.putheader('User-Agent','Lame Tutorial Code')
> 
> h.putheader('Accept','text/html')
> 
> h.endheaders()
> 
> 
> 
> errcode,errmsg, headers = h.getreply()
> 
> print errcode,errmsg, headers
> 
> 
> f = h.getfile() # Get file object for reading data
> 
> data = f.read()
> 
> print data
> 
> f.close()
> 
> 
> I got the error like:::
> 
> Traceback (most recent call last):
> File "c.py", line 6, in ?
> h.endheaders()
> File "/usr/lib/python2.3/httplib.py", line 712, in endheaders
> self._send_output()
> File "/usr/lib/python2.3/httplib.py", line 597, in _send_output
> self.send(msg)
> File "/usr/lib/python2.3/httplib.py", line 564, in send
> self.connect()
> File "/usr/lib/python2.3/httplib.py", line 532, in connect
> socket.SOCK_STREAM):
> socket.gaierror: (-2, 'Name or service not known')
> 
> 
> How can I access Remote sites using http protocol . I did'nt write
> server script.
> 
I would recommend taking a look at urllib or urllib2 if you just want to 
write an HTTP client that accesses the server output, there is no need 
to re-implement low-level HTTP calls.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From mensanator at aol.com  Thu Sep 13 13:19:20 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: Thu, 13 Sep 2007 10:19:20 -0700
Subject: An ordered dictionary for the Python library?
In-Reply-To: <1189664832.876539.86800@k79g2000hse.googlegroups.com>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<7xzlzrtrjn.fsf@ruckus.brouhaha.com>
	<1189664832.876539.86800@k79g2000hse.googlegroups.com>
Message-ID: <1189703960.978455.124440@d55g2000hsg.googlegroups.com>

On Sep 13, 1:27 am, Mark Summerfield <m.n.summerfi... at googlemail.com>
wrote:
> On 13 Sep, 00:03, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
>
> > Mark Summerfield <m.n.summerfi... at googlemail.com> writes:
> > > I feel that Python lacks one useful data structure: an ordered
> > > dictionary.
> > > Do other Python programmers feel this lack? Is this worth a PEP?
>
> > Yes.  It should use a functional data structure.
>
> Could you elaborate?
>
> Here's my impression of the postings so far: there are 3 categories of
> response:
>
> (A) There is no need for such a thing.
>
> (B) It is useful, but so easy to implement that it needn't be in the
> library.
>
> (C) It is worth having an ordered data structure of some kind.
>
> Regarding (A) and (B): I remember Python before it had the sets
> module. "There's no need for sets, you can do them with dicts".
> Thankfully sets are in the language and I for one use them
> extensively.
>
> For (C) what I had in mind was:
>
> An API that is identical to a dict, with the few additional methods/
> behaviours listed below:
> - If an item is inserted it is put in the right place (because the
> underlying data structure, b*tree, skiplist or whatever is
> intrinsically ordered by < on the key)
> - Extra methods
>     key_at(index : int) -> key
>     item_at(index : int) -> (key, value)
>     value_at(index : int) -> value
>     set_value_at(index : int, value) # no return value necessary but
> maybe key if convenient
>     od[x:y:z] -> list of values ordered by key # can read a slice but
> not assign a slice
>   and maybe
>     keys_for(fromindex : int, uptobutexcludingindex : int) -> ordered
> list of keys
>
> I've given examples of the use cases I envisage (and that I use in
> both Python with my own ordered dict and in C++ with the map class) in
> a previous posting, and I've shown the  API I envisage above. I know
> that some people might prefer ordering by value or the option of case-
> insensitive ordering, but both these can be achieved using the API
> above, e.g.,
>     od[value.lower()] = value # case-insensitive ordering of list of
> values
> And as for duplicates there are two approaches I use: (1) make each
> string unique as I showed in my previous post, or (2) use a value that
> itself is a list, dict or set.
> (As for those who have suggested an ordered data structure that isn't
> a dict, I don't see a conflict, I'd be happy to see more data
> structures in the collections module.)
>
> Is what I've suggested sufficient (and sufficiently general) for the
> standard library?

Is the index the insertion order? The only use I have an ordered
dictionary is to quickly determine that a sequence value is the
first duplicate found (the structure can have millions of numbers)
and then play back (so they don't have to be re-calculated) the
sequence from the first duplicate to the end.

So I would get the index when I find the duplicate and then
iterate data[index:] to get the sequence in insertion order?


> If it is not, what should be done, or is there some
> other approach and API that would better provide the functionality
> envisaged?




From Summercoolness at gmail.com  Mon Sep 17 03:33:21 2007
From: Summercoolness at gmail.com (Summercool)
Date: Mon, 17 Sep 2007 07:33:21 -0000
Subject: where are the .pyc files?
In-Reply-To: <mailman.632.1189994231.2658.python-list@python.org>
References: <1189963710.714191.74440@n39g2000hsh.googlegroups.com>
	<5l57t1F655kfU5@mid.uni-berlin.de>
	<1189992200.860524.58620@w3g2000hsg.googlegroups.com>
	<mailman.632.1189994231.2658.python-list@python.org>
Message-ID: <1190014401.434666.110610@19g2000hsx.googlegroups.com>

On Sep 16, 6:56 pm, Steve Holden <st... at holdenweb.com> wrote:
> Summercool wrote:

> > how come a program that runs directly doesn't need to be optimized
> > into bytecode first?  Or... is it that the interpreter will just run
> > the program as it goes by, without ever generating a .pyc file?   So
> > what if you have a program that you only update every few weeks...
> > then you can ask a .pyc to be generated so that it runs faster every
> > time?
>
> You can, if you want, compile a program manually:
>
>    http://docs.python.org/lib/module-compileall.html
>
> and run the resulting .pyc file if you wish. Most people don't bother,
> though. If you have a very large main program you can encapsulate it as
> a library and then call the library function from a teent-weeny main
> program that isn't worth compiling.

that's great... I just wonder why there is no command line that says

  python -c try.py

or something like that to force a generation of the byte code.





From nghai.c at gmail.com  Mon Sep  3 22:31:16 2007
From: nghai.c at gmail.com (nghai)
Date: Tue, 04 Sep 2007 02:31:16 -0000
Subject: Python is overtaking Perl
In-Reply-To: <20070904024908.b8aca60c.sulsa@gazeta.pl>
References: <1188865943.238573.218750@w3g2000hsg.googlegroups.com>
	<20070904024908.b8aca60c.sulsa@gazeta.pl>
Message-ID: <1188873076.818614.107580@r34g2000hsd.googlegroups.com>

I believe that the time-trend chart show the normalized volumes,
relative to the total Google search volume, so a decreasing trend
doesn't mean a decreasing absolute volume. The trends of "Los
Angeles", "China" searches are decreasing over the last three years,
but the absolute volumes should not be (given the popularity of Google
and the rise of China).

Sulsa wrote:
> On Tue, 04 Sep 2007 00:32:23 -0000
> Ben <benyang22 at gmail.com> wrote:
>
> > Here are the statistics from Google Trends:
> >
> > http://benyang22a.blogspot.com/2007/09/perl-vs-python.html
> >
>
> This chart is showing that amount of python programers is smaller every
> year :(



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Sep 12 06:36:04 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 12 Sep 2007 12:36:04 +0200
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
Message-ID: <46e7c10d$0$12917$426a74cc@news.free.fr>

Charles Fox a ?crit :
> I've just started playing around with Python, as a possible
> replacement for a mix of C++, Matlab and Lisp.  The language looks
> lovely and clean with one huge exception:  I do a lot of numerical
> modeling, so I deal with objects (like neurons) described
> mathematically in papers, by equations like
>     a_dot = -k(a-u)
> In other languages, this translates nicely into code, but as far as I
> can tell, Python needs the ugly:
>     self.a_dot = -self.k(self.a-self.u)

"ugliness" is a very subjective notion. As far as I'm concerned, I hate 
the "m_myMember" C++ convention, and have always used the 'this' (or 
whatever it's named) pointer/reference/pseudo-reference/whatever in 
languages where it's implicit - because I don't like such an important 
thing to be implicit.

  self.a_dot = - self.k(self.a - self.u)

> For large equations this is going to make my code seriously unreadable

Ok, but this is another problem.

> to the point of needing to switch back to Matlab -- and it seems to go
> against everything else about python's simplicity and elegance.  Am I
> missing something? 

Yes.

> Is there something like a 'with' command that lets
> me set the scope, like
> 
>     with self:
>       .a_dot = -.k(.a-.u)

Nope. There's a 'with' statement, but it has nothing to do with this.

The obvious solution to your problem is to make local references to the 
needed attributes at the start of your method, ie:

def some_calc(self, whatever):
   k = self.k # yes, it works for methods too
   a = self.a
   u = self.u

   self.a_dot = -k(a-u)

> It's premature to make language suggestions as I am new to the
> language, but I would have though that making a 'with self' explicit
> in all methods would have been neat, so I could just write
>       .a_dot = -.k(.a-.u)
> which would still avoid confusion with local function variables, since
> '.a' is different from 'a'.
> 
> Please help if I am missing something -- this looks like a great
> language but I am going to mad trying to read numerical code full of
> 'self.'s breaking up the equations.

The mandatory 'self' (FWIW, you can name it as you want, 'self' is just 
a convention) has long been the topic of lot of debates. While I do 
understand your motivations, there are actually good reasons for this 
design choice, but understanding these reasons requires some knowledge 
of Python's object model internals. As far as I'm concerned, I'm quite 
happy with the current design, but I don't do much maths !-)



From skip at pobox.com  Mon Sep 10 22:27:18 2007
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 10 Sep 2007 21:27:18 -0500
Subject: [PyCON-Organizers] Next PyCon Organizers' Meeting Tuesday, 11
	September
In-Reply-To: <46E5CFAB.8090802@python.org>
References: <46E5CFAB.8090802@python.org>
Message-ID: <18149.64774.138831.976974@montanaro.dyndns.org>


    David> Connection details:
    David> http://wiki.python.org/moin/PyCon2008/OrganizersMeetingsConnectionDetails

Ah, now I remember.  GAIM complained:

    400: Malformed Jabber ID

GAIM recorded my Jabber ID as "skip.montanaro at jabber.org" which seems pretty
well-formed to me.

Skip


From p.lavarre at ieee.org  Fri Sep  7 11:36:09 2007
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: Fri, 07 Sep 2007 08:36:09 -0700
Subject: platform system may be Windows or Microsoft since Vista
In-Reply-To: <1188661487.176167.32600@57g2000hsv.googlegroups.com>
References: <1188578878.264671.296440@k79g2000hse.googlegroups.com>
	<1188584386.174981.168040@z24g2000prh.googlegroups.com>
	<1188661487.176167.32600@57g2000hsv.googlegroups.com>
Message-ID: <1189179369.101809.298360@g4g2000hsf.googlegroups.com>

> > Log a bug @ bugs.python.org
>
> http://bugs.python.org/issue1082
> TITLE ... platform system may be Windows or Microsoft since Vista

Six days gone with no feedback. Something wrong with the input?

Maybe the blank Priority field?

I agree Severity Major.

I'm thinking no priority because there is no fixing this. We now
choose between two wrong ways to change the Python Msi installer of
Windows:

1. Hide that many people now and for months or years to come will
continue to need both halves of the (platform.system() in ('Windows',
'Microsoft') guard.

2. Leave unchanged to require many more people to need both halves in
future.

I find neither choice inspiring.



From gnewsg at gmail.com  Fri Sep 28 17:16:43 2007
From: gnewsg at gmail.com (=?iso-8859-1?q?Giampaolo_Rodol=E0?=)
Date: Fri, 28 Sep 2007 14:16:43 -0700
Subject: Python and SSL
In-Reply-To: <6cydncA2Jpv082DbnZ2dnUVZ_q6dnZ2d@comcast.com>
References: <1190959345.041723.108130@k79g2000hse.googlegroups.com>
	<6cydncA2Jpv082DbnZ2dnUVZ_q6dnZ2d@comcast.com>
Message-ID: <1191014203.366766.257640@d55g2000hsg.googlegroups.com>

I heard that python 2.6 will include full "server-side SSL
support" (whatever this means).
Is it true?



From steve at holdenweb.com  Wed Sep 12 19:54:11 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 12 Sep 2007 19:54:11 -0400
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <20070912152001.GA20494@sdf.lonestar.org>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>	<1189604018.520338.162520@57g2000hsv.googlegroups.com>	<46e7f450$0$12305$426a74cc@news.free.fr>	<1189608231.151112.147550@y42g2000hsy.googlegroups.com>
	<20070912152001.GA20494@sdf.lonestar.org>
Message-ID: <fc9u71$abu$1@sea.gmane.org>

J. Clifford Dyer wrote:
> On Wed, Sep 12, 2007 at 07:43:51AM -0700, Charles Fox wrote regarding Re: newbie: self.member syntax seems /really/ annoying:
>> Thanks guys -- yeah these two stategies (short s.varname; and explicit
>> rescoping, a=self.a etc) are more or less what I was using.  That's
>> still kind of annoying though.
>>
>> The s.varname approach still makes numerical code much harder to read.
>>
> 
> For what it's worth, if you stick with python for a while, you will stop noticing the self, and be able to see what you're looking for quite clearly.  
> 
> Moreso if you use s.
> 
Not sure that's true, since it still appears to bug Bruce Eckel ...

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From zentraders at gmail.com  Mon Sep 24 16:10:44 2007
From: zentraders at gmail.com (Zentrader)
Date: Mon, 24 Sep 2007 13:10:44 -0700
Subject: Nested For and While Statements
In-Reply-To: <fd94av$fj8$1@daisy.noc.ucla.edu>
References: <1190662087.403000.16290@g4g2000hsf.googlegroups.com>
	<fd94av$fj8$1@daisy.noc.ucla.edu>
Message-ID: <1190664644.936871.57050@57g2000hsv.googlegroups.com>

> Your for loops both use the same counting index.

Since those variables are local to the for loop, theoretically it
should work with both loops using the same variable.  Although bad
practice, I tested it on my machine and the following code does indeed
work as expected, so it appears that the problem is indenting the for
loops properly.
for j in range( 10 ):
   print j, "first loop"
   for j in range( 5 ):
      print "     ", j, "2nd loop"



From stefan.behnel-n05pAM at web.de  Tue Sep 25 06:20:18 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Tue, 25 Sep 2007 12:20:18 +0200
Subject: Inserting an element into existing xml file
In-Reply-To: <1190712485.761290.136570@50g2000hsm.googlegroups.com>
References: <1190712485.761290.136570@50g2000hsm.googlegroups.com>
Message-ID: <46F8E0E2.3050602@web.de>

Anand wrote:
> I'm new to Python. we are using python2.4.
> 
> I wanted to insert an element into an existing xml file. Can anyone
> help me with this?
> I've seen lxml and elementTree in python2.5 has some API's to insert
> into existing xml file.
> We cant use python 2.5 due to some limitations. So how can we do it in
> 2.4?

Install lxml and read the tutorial. It should be easy to grasp, as the API is
very simple.

http://codespeak.net/lxml/tutorial.html
http://codespeak.net/lxml/tutorial.html#elements-are-lists

It's compatible to ElementTree, which you can also install on Python 2.4 (it's
what later became part of Python 2.5).

Stefan


From hvendelbo.dev at googlemail.com  Wed Sep 12 14:40:37 2007
From: hvendelbo.dev at googlemail.com (hvendelbo.dev at googlemail.com)
Date: Wed, 12 Sep 2007 18:40:37 -0000
Subject: pwdmodule.c
Message-ID: <1189622437.459458.129390@57g2000hsv.googlegroups.com>

I am trying to compile Python with cmake, but perhaps there are a few
dependencies that have not been corrected for Windows compilation.

Is pwdmodule.c supposed to be excluded for windows compilation?

Are the makefiles the place to look to deduct which files are meant
for which platforms?

Henrik



From tdelaney at avaya.com  Mon Sep 24 07:58:43 2007
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Mon, 24 Sep 2007 19:58:43 +0800
Subject: sorting a list numbers stored as strings
In-Reply-To: <1190633951.3385.23.camel@dot.uniqsys.com>
Message-ID: <E4C7BCAB1872014F81CEAACD25699B8C0849A9@301081ANEX2.global.avaya.com>

Carsten Haese wrote:

> That interpreter session is a work of fiction, since sorted returns
> the sorted list instead of sorting the list in place. Also, it's
> better (i.e. more readable and likely faster) to use a sort key
> function instead of a comparison function whenever possible. In this
> case, the sort key function is particularly trivial:
> 
>>>> l = ["1", "11", "2", "22"]
>>>> sorted(l, key=int)
> ['1', '2', '11', '22']

It does appear trivial in this case, but need to be careful with using
int() if any of the strings could have leading zeros. In this case, the
fix is almost as trivial:

>>>> l = ["01", "11", "08", "22"]
>>>> sorted(l, key=lambda x: int(x, 10))
> ['01', '08', '11', '22']

Although I just tried the above using just sorted(l, key=int) and it
succeeded. I'm sure that in some version of Python it would have given a
ValueError (due to the default radix being 0) but it appears to have
changed to a default radix of 10 somewhere along the way. The docs don't
specify what the default radix is (I should probably raise a bug report
for this).

Tim Delaney


From ricaraoz at gmail.com  Sat Sep  8 18:30:11 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Sat, 08 Sep 2007 19:30:11 -0300
Subject: Spell-checking Python source code
In-Reply-To: <18c1e6480709081444x69c4d23cx65f7c9b62eda8271@mail.gmail.com>
References: <1189285495.185657.88010@o80g2000hse.googlegroups.com>	
	<46E314FD.7030200@bigfoot.com>
	<18c1e6480709081444x69c4d23cx65f7c9b62eda8271@mail.gmail.com>
Message-ID: <46E32273.2050304@bigfoot.com>

David wrote:
>>> (I know that the better practice is to isolate user-displayed strings
>>> from the code, but in this case that just didn't happen.)
>>>
>> Use the re module, identify the strings and write them to another file,
>> then open the file with your spell checker. Program shouldn't be more
>> than 10 lines.
>>
>>
> 
> Have a look at the tokenize python module for the regular expressions
> for extracting strings (for all possible Python string formats). On a
> Debian box you can find it here: /usr/lib/python2.4/tokenize.py
> 
> It would probably be simpler to hack a copy of that script so it
> writes all the strings in your source to a text file, which you then
> spellcheck.
> 
> Another method would be to log all the strings your web app writes, to
> a text file, then run through your entire site, and then spellcheck
> your logfile.
> 

Nice module :

import tokenize

def processStrings(type, token, (srow, scol), (erow, ecol), line):
    if tokenize.tok_name[type] == 'STRING' :
        print tokenize.tok_name[type], token, \
              (srow, scol), (erow, ecol), line

file = open("myprogram.py")

tokenize.tokenize(
    file.readline,
    processStrings
    )

How would you go about writing the output to a file? I mean, I would
like to open the file at main level and pass a handle to the file to
processStrings to write to it, finally close output file at main level.
Probably a class with a processString method?




From hall.jeff at gmail.com  Sat Sep 29 13:07:06 2007
From: hall.jeff at gmail.com (hall.jeff at gmail.com)
Date: Sat, 29 Sep 2007 17:07:06 -0000
Subject: Program inefficiency?
In-Reply-To: <1191079347.192272.240540@22g2000hsm.googlegroups.com>
References: <1191079347.192272.240540@22g2000hsm.googlegroups.com>
Message-ID: <1191085626.316190.258100@y42g2000hsy.googlegroups.com>

For anyone that cares, I figured out the "problem"... the webhelp
files that it hits the wall on are the compiled search files... They
are the only files in the system that have line lengths that are
RIDICULOUS in length... I'm looking at one right now that has 32767
characters all on one line...

I'm absolutely certain that that's the problem...

Thanks for everyone's help



From stefan.behnel-n05pAM at web.de  Sun Sep  9 06:10:05 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Sun, 09 Sep 2007 12:10:05 +0200
Subject: Python syntax wart
In-Reply-To: <fc0518$aa2$5@lust.ihug.co.nz>
References: <fbvvil$7dj$1@lust.ihug.co.nz> <5khh6nF3i5nuU1@mid.uni-berlin.de>
	<46E390B7.2080808@web.de> <fc0518$aa2$5@lust.ihug.co.nz>
Message-ID: <46E3C67D.1080504@web.de>

Lawrence D'Oliveiro wrote:
> In message <46E390B7.2080808 at web.de>, Stefan Behnel wrote:
> 
>> He means he has to use backslashes instead of parentheses here.
>>
>> Which is not true, you could easily rephrase this as:
>>
>>     for link in GetEachRecord(
>>              "links",
>>              ....):
>>         out.write(
>>              ....
>>              )
>>
>> See? No backslash!
> 
> But then you can no longer use indentation to display the two-dimensional
> structure of the statement.

Not sure what you mean here, but most people wouldn't write such code anyway.

You could easily split it up as

    def format_record(record):
         return "<P..." % (
            record[...],
            record[...])

    link_records = GetEachRecord(
       ...
    )

    for record in link_records:
        out.write(format_record(record))

Which reads much better IMHO.

Stefan


From steve at holdenweb.com  Thu Sep 27 23:17:12 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 27 Sep 2007 23:17:12 -0400
Subject: Python 3.0 migration plans?
In-Reply-To: <7x641vh7yx.fsf@ruckus.brouhaha.com>
References: <mailman.1195.1190936289.2658.python-list@python.org>	<fdhja4$qdk$1@daisy.noc.ucla.edu>	<mailman.1199.1190942384.2658.python-list@python.org>
	<7x641vh7yx.fsf@ruckus.brouhaha.com>
Message-ID: <fdhrnp$vrn$1@sea.gmane.org>

Paul Rubin wrote:
> Steve Holden <steve at holdenweb.com> writes:
>> So what we need is a poll on what the questions should be. I *love* c.l.py.
> 
> One of the offered answers to the current question should be "never".
> That is, I'm hoping to skip 3.0 and switch directly to PyPy.

Well, "No current plans" certainly includes "never", even though it 
might not be quite assertive enough for your tastes.

I hope that PyPy will eventually become good enough to overtake CPython 
as the preferred implementation - it certainly seems to have much 
greater optimization possibilities than CPython.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From eduardo.padoan at gmail.com  Sat Sep 15 13:11:37 2007
From: eduardo.padoan at gmail.com (Eduardo O. Padoan)
Date: Sat, 15 Sep 2007 14:11:37 -0300
Subject: how to join array of integers?
In-Reply-To: <2EE95E6A-D6D0-4742-844E-4F18265DC469@myemma.com>
References: <1189859762.563599.269270@g4g2000hsf.googlegroups.com>
	<a23effaf0709150551g19c611eqe1c912acf02306d3@mail.gmail.com>
	<mailman.577.1189864628.2658.python-list@python.org>
	<13eo0pbiab4spdf@corp.supernews.com>
	<2EE95E6A-D6D0-4742-844E-4F18265DC469@myemma.com>
Message-ID: <dea92f560709151011i5a769de7x368ac9a8bf9c7cd0@mail.gmail.com>

> > It's nice people have invented so many ways to spell the
> > builting "map" ;)
> >
> >>>> ",".join(map(str,[1,2,3]))
> > '1,2,3'
>
> IIRC, map's status as a builtin is going away.

Actually, py3k built-in map == itertools.imap

>>> map(str, [])
<itertools.imap object at 0xb7c7c9ec>

-- 
http://www.advogato.org/person/eopadoan/
Bookmarks: http://del.icio.us/edcrypt


From jeff at jmcneil.net  Tue Sep 11 08:28:32 2007
From: jeff at jmcneil.net (Jeff McNeil)
Date: Tue, 11 Sep 2007 08:28:32 -0400
Subject: IOError - list of all Errno numbers and their meanings?
In-Reply-To: <46E68539.1020404@scivisum.co.uk>
References: <46E68539.1020404@scivisum.co.uk>
Message-ID: <82d28c40709110528g488b9b79yc3733c574de4f0ef@mail.gmail.com>

The 'errno' number (at least on the *nix platforms I use) corresponds
to the 'errno' number set on system call failure.   POSIX.1 specifies
a set of standard errors.  AFAIK, the 'errno' module should contain
the mappings for your system.

On 9/11/07, Tim Couper <tim.couper at scivisum.co.uk> wrote:
> As you know, when an IOError is raised, you get a helpful:
>
> [Errno N] <useful descriptor of the error>
>
> Is there a list of all possible values of N which can be returned, and
> their meanings?
>
> --
> Dr Tim Couper
> CTO, SciVisum Ltd
>
> www.scivisum.com
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From mcknight0219 at gmail.com  Sun Sep 16 12:41:08 2007
From: mcknight0219 at gmail.com (Jimmy)
Date: Sun, 16 Sep 2007 09:41:08 -0700
Subject: (curses) issue about inch()
In-Reply-To: <mailman.617.1189959039.2658.python-list@python.org>
References: <1189955232.216664.167840@19g2000hsx.googlegroups.com>
	<mailman.617.1189959039.2658.python-list@python.org>
Message-ID: <1189960868.349377.249530@k79g2000hse.googlegroups.com>

On Sep 17, 12:07 am, Steve Holden <st... at holdenweb.com> wrote:
> Jimmy wrote:
> > hi, all
> > I attempt to use the function inch() to get the character at the
> > current position, and compare it with a particular character like :
> > if screen.inch(x,y) == 'F'
> > but this method doesn't seem work, can anyone tell me the reason and
> > how to corrent it
> > thanks
>
> The reason is because something is wrong, and yo fix it by correcting
> that issue.
>
> In other words, if you could be a bit more specific about *how* it
> doesn't work (like, show us the code you are running,a nd any error
> messages or evidence of incorrect results) you will be able to get some
> help that actually helps you.
>
> Would you go to a car repair shop with faulty brakes and just tell them
> "my car isn't working"?
>
> regards
>   Steve
> --
> Steve Holden        +1 571 484 6266   +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb      http://del.icio.us/steve.holden
>
> Sorry, the dog ate my .sigline

thanks,
actually i'm writing a game like mine,the pertainign code is:

def mark():
	"""mark the bomb"""
	(row, col) = gb.scrn.getyx()
	x = gb.scrn.inch(row,col)
	if x == 'F':
		gb.scrn.addch(row,col, 'X',curses.color_pair(3))
	else:
		gb.scrn.addch(row,col, 'F',curses.color_pair(3))

	gb.scrn.move(row,col)
	gb.scrn.refresh()

the situation is x never equals 'F', even when it really is!
I checked the mannual and found the return value of inch() consists
the actual character(low 8bits)
and the attributes, so I tried the following: (x<<24)>>24,cause I
guess the int is 32bits long.
but it still doesn't work :(



From ilikecandy7 at gmail.com  Tue Sep  4 10:56:29 2007
From: ilikecandy7 at gmail.com (frenchy64)
Date: Tue, 04 Sep 2007 14:56:29 -0000
Subject: Parse or Pass?
In-Reply-To: <mailman.28.1188917501.2658.python-list@python.org>
References: <1188917032.271543.236420@d55g2000hsg.googlegroups.com>
	<mailman.28.1188917501.2658.python-list@python.org>
Message-ID: <1188917789.483017.62070@r34g2000hsd.googlegroups.com>

> In general, "parsing" is analyzing the grammatical structure of a
> string. People sometimes talk loosely about "parsing the command line".
> but I don't think that's normally applied to providing the actual
> arguments (corresponding to the definition's "formal parameters") when a
> function is called - that's argument passing.
>
> regards
>   Steve
Thanks Steve, great post!



From david at asdf.asdf  Sun Sep  9 21:21:58 2007
From: david at asdf.asdf (bambam)
Date: Mon, 10 Sep 2007 11:21:58 +1000
Subject: concise code (beginner)
References: <13dsvqrqivtf092@corp.supernews.com>
	<fbmrsg$dsi$1@daisy.noc.ucla.edu>
	<1189020188.842700.50950@d55g2000hsg.googlegroups.com>
	<fbn42h$k37$1@daisy.noc.ucla.edu>
	<1189108607.080926.103650@19g2000hsx.googlegroups.com>
	<1189183560.572177.56930@r34g2000hsd.googlegroups.com>
Message-ID: <13e971s8qujjm3a@corp.supernews.com>

> Removing from a list while you iterate will had quadratic performance

Anecdote:
    I was doing a route-finding program for a railway
ticketing system. My replacement explained to my boss
that it couldn't be done: the problem was one of that
class of problems that has no good optimum solution.
My replacement told me this while we were doing the
hand-over. I told him that the route-finding optimiser
was already complete.

It did a search of possible routes over the 3 loops, 15
branches and 75 stations in less time than it took to
redraw the screen, and that was without even bothering
to recode the tail recursion.

In my present case, the lists I am working with have ~10
elements.  Defined behaviour, even if it was inapropriate
for my needs, would be welcome. Language enhancement
that make the  code clearer and easier would be welcome.
Optimisers for large sets I could continue to do by other means.

Raw cPython is probably not a good choice for real-time
signal processing, but that's not what I am doing.

> O(n) to find the element you wish to remove and move over
> everything after it,

Is that how lists are stored in cPython? It seems unlikely?

Steve.

"Rhamphoryncus" <rhamph at gmail.com> wrote in message 
news:1189183560.572177.56930 at r34g2000hsd.googlegroups.com...
> On Sep 6, 1:56 pm, Karthik Gurusamy <kar1... at gmail.com> wrote:
>> That said, it may be a good future language enhancement to define a
>> reasonable consistent behavior for an iterator over a changing
>> collection. This occurs quite common when we walk a collection and
>> usually delete the current item.
>>




From martin at v.loewis.de  Mon Sep 10 17:34:05 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 10 Sep 2007 23:34:05 +0200
Subject: Why zlib not included in Python tarball?
In-Reply-To: <mailman.337.1189455641.2658.python-list@python.org>
References: <mailman.337.1189455641.2658.python-list@python.org>
Message-ID: <46E5B84D.5020803@v.loewis.de>

>  I need to install my own Python. I compiled Python 2.4.4 from sources. zlib 
> did not compile - it's not in the lib-dynload directory.
> 
> I did not have this problem with any of my earlier Python compiles. I 
> routinely compile Python from source.
> 
> What is the correct procedure for installing zlib from source into Python?

Depends on the operating system and the Python version. On Unix, you
need to install zlib first; if you install a precompiled zlib package,
make sure you install the header files as well.

Regards,
Martin


From http  Fri Sep  7 22:22:43 2007
From: http (Paul Rubin)
Date: 07 Sep 2007 19:22:43 -0700
Subject: Generating a unique identifier
References: <13e2fgbbpsatm39@corp.supernews.com>
	<7x3axq7a8a.fsf@ruckus.brouhaha.com>
	<13e3us269f59s7a@corp.supernews.com>
	<7xd4wt99yv.fsf@ruckus.brouhaha.com>
Message-ID: <7xtzq57v64.fsf@ruckus.brouhaha.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
> the probability is about exp(-(2**60 / 2*2**160)) = 1/exp(2**101)

Bah.  Got that backwards and calculated wrong.  The probability of no
collisions is

    exp(-(2**60) / (2*2**160)) = exp(-(2**-101)) = approx (1 - 2**-101)

which is very close to 1.  The probability of collision is about
2**-101 which is close to 0.  Proofread first, then post.  I keep
getting that in the wrong order. 


From kay.schluehr at gmx.net  Sun Sep 23 21:32:28 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: Sun, 23 Sep 2007 18:32:28 -0700
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <46f6e9b0$0$32168$426a74cc@news.free.fr>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<1190413322.962737.53900@r29g2000hsg.googlegroups.com>
	<1190414192.636397.146450@57g2000hsv.googlegroups.com>
	<1190443748.907702.154660@22g2000hsm.googlegroups.com>
	<7xlkazgpc5.fsf@ruckus.brouhaha.com>
	<1190447257.060479.141280@n39g2000hsh.googlegroups.com>
	<5lk2olF8gic1U5@mid.uni-berlin.de>
	<1190454275.282176.90830@k79g2000hse.googlegroups.com>
	<46f6e9b0$0$32168$426a74cc@news.free.fr>
Message-ID: <1190597548.214612.181140@22g2000hsm.googlegroups.com>

On 22 Sep., 02:14, Bruno Desthuilliers
<bdesth.quelquech... at free.quelquepart.fr> wrote:
> Kay Schluehr a ?crit :
> (snip)
>
>
>
> > I checked out Io once and I disliked it. I expected Io's prototype OO
> > being just a more flexible variant of class based OO but Io couples a
> > prototype very closely to its offspring. When A produces B and A.f is
> > modified after production of B also B.f is modified. A controls the
> > state of B during the whole lifetime of B. I think parents shall not
> > do this, not in real life and also not in programming language
> > semantics.
>
> I may totally miss the point, but how is this different from:
>
> class A(object):
>      def dothis(self):
>          print "A.dothis(%s)" % self
>
> class B(A):
>      pass
>
> b = B()
>
> b.dothis()
>
> def dothat(self):
>      print "function dothat(%s)" % self
>
> A.dothis = dothat
> b.dothis()

It's not a big deal because you do not use a class to propagate
mutable state unless you are using a class attribute intentionally ( i
guess you do not overuse it just to avoid object encapsulation and
make everything global ). When using a prototype as in Io you need to
protect the state of the child object yourself. You can do this by
overwriting the objects slots but then you end up writing your own
object constructors and the templates accordingly, also named
"classes" by some. Not having dedicated object constructors, member
variable initializations and the presumed class definition boilerplate
comes at the price of introducing them on your own.

Prototypes have a purpose of course when you want to transfer state to
a newly created object. Using a prototyping mechanism as a generic
form of a copy constructor is the right kind to thinking about them
IMO.

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

I have got the impression that the discussion has drifted away from
what Paul Rubin suggested, namely abandone the expression/statement
distinction. Instead we are discussing the advantages and
disadvantages of object models now. Can we stop here, please?



From pavlovevidence at gmail.com  Sun Sep  9 04:16:58 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sun, 9 Sep 2007 04:16:58 -0400
Subject: Python syntax wart
References: <fbvvil$7dj$1@lust.ihug.co.nz>
Message-ID: <46e3ac02$2$28851$4c368faf@roadrunner.com>

On Sun, 09 Sep 2007 17:16:05 +1200, Lawrence D'Oliveiro wrote:

> The one thing I don't like about Python syntax is using backslashes to
> continue lines. Yes, you can avoid them if you can include parentheses
> somehow, but this isn't always possible.
> 
> Possible:
> 
>     if (
>             quitting
>         and
>             len(client["to_write"]) == 0
>         and
>             len(client["read"]) + client["to_read"] == 0
>     ) :
>         close_client(client, "shutting down")
>     #end if
> 
> Not possible:
> 
>     for \
>         Link \
>     in \
>         GetEachRecord \
>           (
>             "links",
>             ("from_episode",),
>             "to_episode = %s",
>             [EpisodeID],
>             "order by when_created"
>           ) \
>     :

Hmm.  Complaints about the backslash come up from time to time, but this 
is the first time I can recall anyone complaining because you couldn't 
break a line right after the "for" keyword.

I'm sure you'll find agreement that backslash continuations are ugly, but 
probably hardly anyone feels compelled to use them the way you 
demonstrate above.


[snippage]

>     #end for

No offense, but using things like "#end for" isn't really the best way to 
impress (most of) the Python community with your eye for syntax.

You're relatively new to Python, correct?  If so, maybe you should give 
yourself some time to see if some of Python's unconventional features 
grow on you.  I've found that wherever Python differs from the common 
ways to do things, it's usually different in a good way.  You should give 
Python a chance to be Python, without trying to force it to be like 
languages that do things like break for statements into several lines, or 
use block delimiters.


Carl Banks


From carsten at uniqsys.com  Thu Sep  6 14:14:10 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 06 Sep 2007 14:14:10 -0400
Subject: Beginners Query - Simple counter problem
In-Reply-To: <13e0g0id9rlmg71@corp.supernews.com>
References: <WZidnbvgAJstpX3bRVnytgA@bt.com>
	<13e0g0id9rlmg71@corp.supernews.com>
Message-ID: <1189102450.3376.17.camel@dot.uniqsys.com>

On Thu, 2007-09-06 at 11:00 -0700, Scott David Daniels wrote:
> def d6(count):
>      result = 0
>      for die in range(count):
>          result += random.randint(1, 6)
>      return result

This, of course, can be further improved into:

def d6(count):
    return sum(random.randint(1, 6) for die in range(count))

-- 
Carsten Haese
http://informixdb.sourceforge.net




From hassen62 at voila.fr  Fri Sep 14 17:56:34 2007
From: hassen62 at voila.fr (hassen62 at voila.fr)
Date: Fri, 14 Sep 2007 23:56:34 +0200 (CEST)
Subject: reading xls file from python
Message-ID: <21903009.66741189806994236.JavaMail.www@wwinf4602>

hi friends, 
I have installed python 2.5 for windows in my pc, I have a file xls say "file.xls" in c:/python25. How I can read this files from Python. Many thanks in advance.
Hassen.
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From steveo at syslang.net  Fri Sep 14 16:52:14 2007
From: steveo at syslang.net (Steven W. Orr)
Date: Fri, 14 Sep 2007 16:52:14 -0400 (EDT)
Subject: 2 daemons write to a single file /w python file IO
In-Reply-To: <fc7p9i$1rr$1@sea.gmane.org>
References: <fc7p9i$1rr$1@sea.gmane.org>
Message-ID: <alpine.LFD.0.9999.0709141348260.6891@saturn.syslang.net>

On Tuesday, Sep 11th 2007 at 21:17 -0700, quoth Andrey:


=>i have a newbie question about the file() function.
=>I have 2 daemons running on my linux box.
=>
=>1 will record the IDs to a file - logs.txt
=>other 1 will open this file, read the IDs, and then "Clean up the 
=>file" -logs.txt
=>
=>Since these 2 daemons will run every 2-5mins, I think this will crash, isn't 
=>it? When both daemons try to write to the file at the same time.
=>
=>I am wondering if this won't crash, OR if there is some simple high-level 
=>functions can lock the file while writing...
=>I also wonder if one side locked the file, what happens if the other side 
=>try to open this locked file? raise error? so i also need to write a loop to 
=>wait for the file to release locking?
=>
=>seems a basic easy thing but i just cannot find an simple answer.
=>I always advoid this issue by putting them in mysql (well, fast and hassle 
=>free for locking)

This is more of a unix question as opposed to a python question, but I'll 
'splain it anyways :-)

If two processes each have a channel opened to the same file then it is 
very possible for the writes to collide. One way to mitigate the damage 
would be to make sure that the two processes open the file for append 
access instead of simple write access. This will ensure that the if 
ProcessA writes data that ProcessB's next write won't overwrite the data 
that A just wrote. But! It still won't work! You will still get 
interleaving of data in your output file. They will all get out there, but 
the data will on occasion look garbled because the interleaving won't look 
like it was partitioned as the different processes intended.

So what's the solution? It turns out that data that is written to a pipe 
(as opposed to data that is written to a file) is guaranteed to maintain 
its partitioned integrity.

P1 >> fn
P2 >> fn

If you are the guy who starts P1 and P2 from a parent process(PP) then you 
could structure your pipes so you end up with 

              PP > fn
             / \
            /   \
           P1   P2

and just make PP be a multiplexor.  :-)

-- 
Time flies like the wind. Fruit flies like a banana. Stranger things have  .0.
happened but none stranger than this. Does your driver's license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren't a hypothetical question?
steveo at syslang.net


From saptarshi.guha at gmail.com  Sat Sep 22 10:23:56 2007
From: saptarshi.guha at gmail.com (sapsi)
Date: Sat, 22 Sep 2007 07:23:56 -0700
Subject: Sets in Python
In-Reply-To: <Jz1Ji.5487$7P7.2532@newssvr19.news.prodigy.net>
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
	<CeB*qHeVr@news.chiark.greenend.org.uk>
	<1190235483.412972.81280@v23g2000prn.googlegroups.com>
	<13f3m15igkstq2e@corp.supernews.com>
	<1190260923.243865.312190@z24g2000prh.googlegroups.com>
	<13f4nclh902f78f@corp.supernews.com>
	<mailman.855.1190359579.2658.python-list@python.org>
	<Jz1Ji.5487$7P7.2532@newssvr19.news.prodigy.net>
Message-ID: <1190471036.715212.62540@o80g2000hse.googlegroups.com>

Thank you everyone for the assistance and for the very informative
discussion
Regards
SM



From christopher.pax at gmail.com  Fri Sep 28 21:57:50 2007
From: christopher.pax at gmail.com (Chris Pax)
Date: Sat, 29 Sep 2007 01:57:50 -0000
Subject: using inspect on pygtk
Message-ID: <1191031070.901842.71210@o80g2000hse.googlegroups.com>

Hello,

I recently been trying to use the inspect module to inspect the
arguments of gtk objects, such as gtk.Button. I tried like this:

inspect.getargspec(gtk.Button.__init__)

and get the fallowing error:

  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.5/inspect.py", line 743, in getargspec
    raise TypeError('arg is not a Python function')
TypeError: arg is not a Python function


I have been trying to do this through code so that I don't have to
have a list of all possible gtk classes and their arguments.



From ratchetgrid at googlemail.com  Sun Sep 16 19:02:30 2007
From: ratchetgrid at googlemail.com (Nathan Harmston)
Date: Mon, 17 Sep 2007 00:02:30 +0100
Subject: Free Python Ebook
In-Reply-To: <46ED0993.5090604@yafd.de>
References: <1189932765.100822.82720@r29g2000hsg.googlegroups.com>
	<46ED0993.5090604@yafd.de>
Message-ID: <676224240709161602u4158e146n772b99bb1893a77@mail.gmail.com>

Theres a few python ebooks listed on the wiki................

http://wiki.python.org/moin/PythonBooks

Hope this helps,

Nathan


On 16/09/2007, Marco <marco at yafd.de> wrote:
> Hi George,
>
>  > Please tell me from which website I will get the free Python Ebook.
> which one do you mean?
>
> I only know this one:
> http://diveintopython.org
>
> Bye,
> Marco
>
> PS: Sorry, hit the wrong button the first time ;-)
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From timaranz at gmail.com  Sun Sep 30 16:10:40 2007
From: timaranz at gmail.com (timaranz at gmail.com)
Date: Sun, 30 Sep 2007 13:10:40 -0700
Subject: GUI for viewing/editing python data structures?
In-Reply-To: <mailman.1139.1190845438.2658.python-list@python.org>
References: <mailman.1139.1190845438.2658.python-list@python.org>
Message-ID: <1191183040.750816.253910@22g2000hsm.googlegroups.com>

On Sep 27, 11:23 am, "Joshua J. Kugler" <jos... at eeinternet.com> wrote:
> A while back, I seem to remember coming across a small program that could
> view and edit python data structures via a nice expanding tree view.  I'm
> now in need of something like that (to verify data is imported correctly
> into a shelve file) and having a GUI would be much simpler than trying to
> wade through the output of str(d) or repr(d).
>
> I've tried googling with the obvious keywords (gui (view OR edit) python
> data structures) but t didn't get me anywhere.
>
> Pointers?
>
> j
>
> --
> Joshua Kugler
> Lead System Admin -- Senior Programmerhttp://www.eeinternet.com
> PGP Key:http://pgp.mit.edu/ ID 0xDB26D7CE

Try any of the good Python IDE's and use breakpoints and the watch
window. I like wing IDE from wingware.com - they have a free version
now.



From fredrik at pythonware.com  Wed Sep 26 04:47:10 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 26 Sep 2007 10:47:10 +0200
Subject: the address of list.append and list.append.__doc__
In-Reply-To: <1190788149.477809.80130@g4g2000hsf.googlegroups.com>
References: <1190775258.351819.24930@22g2000hsm.googlegroups.com>	<mailman.1077.1190776788.2658.python-list@python.org>	<1190780557.879816.13800@d55g2000hsg.googlegroups.com>	<mailman.1083.1190785973.2658.python-list@python.org>
	<1190788149.477809.80130@g4g2000hsf.googlegroups.com>
Message-ID: <fdd6ae$4iq$1@sea.gmane.org>

HYRY wrote:

> This works, but I think the key of DOC is too long, so I want to use
> the id of list.append.__doc__ as the key; or use the id of
> list.append:
> 
> DOC[id(list.append.__doc__)] = "..."
> DOC[id(list.append)] = "..."
> 
> So, I asked how to get list.append from a.append, and why
> id(list.append.__doc__) changes.

dictionaries hold *references* to objects, not copies of the object 
values, so that won't save you anything.

</F>



From answer654 at 8439.e4ward.com  Sat Sep 15 15:59:05 2007
From: answer654 at 8439.e4ward.com (Michael Goerz)
Date: Sat, 15 Sep 2007 15:59:05 -0400
Subject: calling locale.setlocale repeatedly
Message-ID: <5l2rs3F64tgmU1@mid.uni-berlin.de>

Hi,

From
http://www.pyzine.com/Issue008/Section_Articles/article_Encodings.html#guessing-the-encoding:
> The way to access the information about the "normal" encoding used on the current computer is through the locale module. Before using locale to retrieve the information you want, you need to call locale.setlocale(locale.LC_ALL, ''). Because of the sensitivity of the underlying C locale module on some platforms, this should only be done once.

Why should the call
locale.setlocale(locale.LC_ALL, '')
only be made once? What exactly is the "sensitivity of the underlying C
locale module"?


Thanks,
Michael


From raims at dot.com  Sun Sep 23 10:02:11 2007
From: raims at dot.com (Lawrence Oluyede)
Date: Sun, 23 Sep 2007 16:02:11 +0200
Subject: newb: Question regarding custom exception
References: <1190550748.698865.210740@22g2000hsm.googlegroups.com>
Message-ID: <1i4whsf.1x6h74h163pw0aN%raims@dot.com>

crybaby <joemystery123 at gmail.com> wrote:
> Why you specify type and name of the exception in your custom
> exceptions,

It's up to you, if you're interested in the actual exception object you
catch it, otherwise not.

Take a look at this:
<http://boodebr.org/main/python/tourist/taking-exception>

-- 
Lawrence, oluyede.org - neropercaso.it
"It is difficult to get a man to understand 
something when his salary depends on not
understanding it" - Upton Sinclair


From wolf_tracks at invalid.com  Thu Sep 20 12:29:52 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Thu, 20 Sep 2007 16:29:52 GMT
Subject: Tutorial or Example (or Tutorial) of Using Canvas to Producea Plot
In-Reply-To: <mailman.793.1190273959.2658.python-list@python.org>
References: <phRHi.50851$Um6.35199@newssvr12.news.prodigy.net><13evohih7rkd030@corp.supernews.com><WPTHi.5906$FO2.4148@newssvr14.news.prodigy.net><13f0b2qlvj5ige6@corp.supernews.com><hnWHi.9038$z_5.1095@nlpi069.nbdc.sbc.com><9ai0f39lejmjc2qbfcgo1t4h8b3e6ot9jd@4ax.com><1190185249.235840.263260@50g2000hsm.googlegroups.com>	<Mn9Ii.9921$924.3247@newssvr23.news.prodigy.net>
	<mailman.793.1190273959.2658.python-list@python.org>
Message-ID: <4exIi.685$6p6.482@newssvr25.news.prodigy.net>

That's odd; however, it's likely close enough.

Hendrik van Rooyen wrote:
> "W. Watson" <wolf_tracks at invalid.com> wrote:
> 
> 
>> I'm just trying to get some feel for how canvas works. I'm about to modify a 
>> program I use for meteor work. It uses canvas to display images, and I plan 
>> to draw on the image. For example, I plan to draw compass headings on a 
>> circle every 30 degrees. Just warming up to the task.
> 
> Don't be surprised if you can't draw a full circle - I have never managed it,
> but 359.99 degrees works fine
> 
> - Hendrik
> 

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From ptmcg at austin.rr.com  Fri Sep 14 01:34:33 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Thu, 13 Sep 2007 22:34:33 -0700
Subject: How to Start
In-Reply-To: <MPG.215360ba6684d43b9896d5@news.cox.net>
References: <MPG.215360ba6684d43b9896d5@news.cox.net>
Message-ID: <1189748073.196112.254870@w3g2000hsg.googlegroups.com>

On Sep 13, 4:59 pm, mrc2... at cox.net (Michael R. Copeland) wrote:

>    Yes, I could fire up the interactive mode and play with some
> statements...but I consider that sort of thing for programming
> neophytes or experimenting with specific issues.  

To misquote Francis Bacon, "you would have fish, but dare not get your
fingernails dirty."

Back in '62-minus, when you started programming, there was no such
thing as "just dive in and try stuff."  Imagine if someone had said,
"Just punch some random holes in this computer card and feed it in -
you'll get the hang of it," you would have thought they were crazy.
So you probably read a whole bunch of books first, before you punched
your very first card, and then stood in line to feed your deck to the
card reader on "the mainframe," then waited anywhere from 15 minutes
to an hour or more to get your job output.  The length of this cycle
was itself a deterrent to interactive experimentation - you had to
*know* what you were doing and do it right, or risk wasting an hour
because you accidentally punched a character in column 6 instead of
column 7.  In fact, much of the software development process from that
era was oriented around avoiding as many needless compile/run cycles
as possible.

Well, in 45+ years, things have progressed a bit.  Nowadays, I don't
pore over my code looking for that stray or missing brace or closing
paren - the compiler will tell me in about 3 seconds where these
syntax errors are.

And so too with Python.  Do "neophytes" just dive in and try stuff?
What of it?  You have chosen a nice simple little problem space, well
within the fairway of the vanilla, batteries-included Python.  In your
noobiness you might write some code that duplicates the features of a
standard built-in module, but so what?  Isn't your goal to learn the
language as well as the libraries?  And you would not be the first
(nor the last) to post a question to this group along the lines of
"can you look at this code and see what I'm doing wrong?" and get back
the answer of "what you're doing wrong is writing your own code
instead of just using standard module X" - it happens to many
newcomers and nearly all survive this early trauma.  Just because I
can convert a list of data into a histogram in a single line of code
if I use itertools.groupby, doesn't invalidate my learning how to do
it in 4 lines with a defaultdict, or 6 lines with an explicit for
loop.

In your shoes, I would pursue a minimalist approach, learning the
basic language features, and then browsing through the standard lib
docs to get familiar with the available modules.  Get a no-frills IDE
with a short learning curve - I like SciTE for this, although there is
no auto-completion - to help automate your code/run cycle (note: just
code/run, no compile step!).  I also suggest you go to the Python.org
wiki and look for the documentation for experienced programmers who
are starting to switch over to Python (http://wiki.python.org/moin/
BeginnersGuide/Programmers) - others have trod this path before, and
some have left bread crumbs behind.

Best of luck!
-- Paul



From brown at esteem.com  Thu Sep  6 19:26:57 2007
From: brown at esteem.com (Tom Brown)
Date: Thu, 6 Sep 2007 16:26:57 -0700
Subject: Subclassing zipfile (new style class)
In-Reply-To: <H8KdnVfPDO28F33bnZ2dnUVZ_i2dnZ2d@comcast.com>
References: <H8KdnVfPDO28F33bnZ2dnUVZ_i2dnZ2d@comcast.com>
Message-ID: <200709061626.57801.brown@esteem.com>

On Thursday 06 September 2007 16:15, Larry Bates wrote:
> I'm trying to learn about subclassing new style classes and the first
> project I went to do needs to subclass zipfile to add some methods.
>
>
> Why does this:
>
> import zipfile
> class walkZip(zipfile):
>      pass
>
>
> if __name__ == "__main__":
>      print "Hello World"
>
> Traceback (most recent call last):
>    File "<string>", line 192, in run_nodebug
>    File "<module1>", line 2, in <module>
> TypeError: Error when calling the metaclass bases
>      module.__init__() takes at most 2 arguments (3 given)
>

I think because you need to do this:

from zipfile import ZipFile
class walkZip(ZipFile):
	pass


-Tom


From python at hope.cz  Sat Sep 15 09:44:36 2007
From: python at hope.cz (Johny)
Date: Sat, 15 Sep 2007 06:44:36 -0700
Subject: How to get headers in urllib2 response
Message-ID: <1189863876.901048.114410@o80g2000hse.googlegroups.com>

Can anyone provide an example how to find out the return code and
header  from an urllib2 request?
For example
response = urllib2.urlopen('http://www.google.com').read().strip()
provides data
 but I do not know if the return code was 200 or different.

Thanks



From sandipan at earthlink.net  Tue Sep  4 08:12:22 2007
From: sandipan at earthlink.net (Sandipan Gangopadhyay)
Date: Tue, 4 Sep 2007 08:12:22 -0400
Subject: Setting Current Dir in Python
Message-ID: <000001c7eeec$d9341470$8b9c3d50$@net>

Hi all!

I have utility programs in Python that do clean up, image processing tasks
on files in a folder. I just drop the program into the folder and run it.

I have been double clicking on a Python program in my Windows XP Home to
make it run . it sets the program's directory as the current directory when
it runs.

I have recently installed Python 2.5.1 and Pythonwin (without any errors) on
Windows Vista Ultimate.

Now, the programs run fine within Pythonwin IDE when current directory is
set to the program's directory.

But, when I double click them from Windows Explorer, the program is not run.

If I run the following program:

============================================================================
===============
# MODULE IMPORT
try:
    import time, os, Image, urllib, string, math, os.path, filecmp, shutil,
sys
except:
    strInput = raw_input("Failed import. Hit enter key to continue.")
    pass

# FIGURE OUT CURR DIR
try:
    print "CURENT = %s" % os.listdir(".")
    print "PARENT = %s" % os.listdir("..")
    print "ABS PATH = %s" % os.path.abspath(".")
    print "CURENT = %s" % os.listdir(os.curdir)
    print "PARENT = %s" % os.listdir(os.pardir)
except:
    strInput = raw_input("Failed os module calls. Hit enter key to end.")
    pass

print
strInput = raw_input("Hit enter key to end program")

Through Pythonwin IDE without setting the directory (using Open, or Save
As), I get:

============================================================================
===============
CURENT = ['addins', 'AppPatch', 'assembly', 'atl80.dll',  . - snip - . ,
'winsxs', 'WMSysPr9.prx', 'xpsp1hfm.log', '_default.pif']
PARENT = ['$Recycle.Bin', 'autoexec.bat', 'Boot', 'bootmgr', 'BOOTSECT.BAK',
'config.sys', 'Documents and Settings', . - snip - . , 'Program Files',
'ProgramData', 'Python25', . - snip - . , 'System Volume Information',
'temp', 'Users', 'Windows']
ABS PATH = C:\Windows
CURENT = ['addins', 'AppPatch', 'assembly', 'atl80.dll', . - snip - ., ,
'winsxs', 'WMSysPr9.prx', 'xpsp1hfm.log', '_default.pif']
PARENT = ['$Recycle.Bin', 'autoexec.bat', 'Boot', 'bootmgr', 'BOOTSECT.BAK',
'config.sys', 'Documents and Settings', . - snip - . , 'Program Files',
'ProgramData', 'Python25', . - snip - . , 'System Volume Information',
'temp', 'Users', 'Windows']

If I run it using double click on the program through Windows Explorer, I
get:

============================================================================
===============
Nothing . the window closes immediately. Despite the except catches.

If I run it from a Command Prompt, by first navigating to the program's
directory and then specifying [ python.exe SandhirFileMonitor.py ], I get:

============================================================================
===============
sys:1: DeprecationWarning: Non-ASCII character '\xef' in file
SandhirFileMonitor.py on line 356, but no encoding declared; see
http://www.python.org/peps/pep-0263.html for details
Failed import. Hit enter key to continue.
CURENT = ['Diff.txt', 'Folder2', 'report-templates', 'reports - Copy
(2).html','reports - Copy (3).html', 'reports - Copy (4).html', 'reports -
Copy (5).html', 'reports - Copy.html', 'reports.html',
'SandhirFileBackupUtility - Copy.py', 'SandhirFileBackupUtility.py',
SandhirFileBackupUtility.py - Shortcut.lnk', 'SandhirFileMonitor.py']
PARENT = ['BackupV10', 'BackupV11', 'DayReadiness', 'reporterV70']
ABS PATH =
E:\Data\ActiveData\SandipanPersonalData\FromNODE06\SoftwareBackups\BackupV11
CURENT = ['Diff.txt', 'Folder2', 'report-templates', 'reports - Copy
(2).html', 'reports - Copy (3).html', 'reports - Copy (4).html', 'reports -
Copy (5).html', 'reports - Copy.html', 'reports.html',
'SandhirFileBackupUtility - Copy.py', 'SandhirFileBackupUtility.py',
'SandhirFileBackupUtility.py - Shortcut.lnk', 'SandhirFileMonitor.py']
PARENT = ['BackupV10', 'BackupV11', 'DayReadiness', 'reporterV70']

I am obviously missing something very simple, but I can't figure this out .
it's been a few days now.

Can someone help? Thanks.

Sandipan




From theller at ctypes.org  Fri Sep  7 10:22:29 2007
From: theller at ctypes.org (Thomas Heller)
Date: Fri, 07 Sep 2007 16:22:29 +0200
Subject: py2exe - change name of exe created
In-Reply-To: <1189165183.727542.47640@19g2000hsx.googlegroups.com>
References: <1189164934.705547.156670@r34g2000hsd.googlegroups.com>
	<1189165183.727542.47640@19g2000hsx.googlegroups.com>
Message-ID: <fbrmr5$2u9$1@sea.gmane.org>

imageguy schrieb:
> Sorry for the double post, sent it to quickly.
> 
> I have a setup script like this;
> 
> setup(windows = [{"script":"myprogram.py",
>                    "icon_resources":[(0,"nabbitt.ico")],
>                     "other_resources": [(24,1,manifest)]}
> ],
>                 name = "My Program ver 0.1",
>                 data_files = [("",rootdata)],
>                 zipfile = None,
>                 options = {"py2exe": {
>                                        "compressed" : 1,
>                                        "dll_excludes":
> ["w9xpopen.exe"],
>                                         "bundle_files": 3
>                                                 }
>                         },
>                 )
> 
> 
> Note that every thing works fine with this and creates an exe program
> called
> "myprogram.exe"
> 
> I would like to setup program to create an output called;
> "MyBestProgram.exe"
> 
> IS that at all possible ?

Yes.  Use a 'dest_base' key in the dictionary, like so:

> setup(windows = [{"script":"myprogram.py",
>                    "icon_resources":[(0,"nabbitt.ico")],
                     "dest_base": "MyBestProgram",
>                     "other_resources": [(24,1,manifest)]}
...

'dest_base' is the basename of the destination program that py2exe creates.

Thomas



From mccredie at gmail.com  Fri Sep 21 18:02:44 2007
From: mccredie at gmail.com (Matt McCredie)
Date: Fri, 21 Sep 2007 15:02:44 -0700
Subject: I could use some help making this Python code run faster using
	only Python code.
In-Reply-To: <1190394011.148384.106280@q3g2000prf.googlegroups.com>
References: <1190325588.608625.259800@q3g2000prf.googlegroups.com>
	<1190328413.226577.206740@k79g2000hse.googlegroups.com>
	<1190330015.131971.265680@y42g2000hsy.googlegroups.com>
	<1190357165.381313.197910@19g2000hsx.googlegroups.com>
	<Xns99B25B0334892duncanbooth@127.0.0.1>
	<1190394011.148384.106280@q3g2000prf.googlegroups.com>
Message-ID: <9e95df10709211502h5d7ba4apb6f8f54e04711a3e@mail.gmail.com>

> Now I think I will code this little scrambler using nothing but the D
> Language just to see whether there is any benefit in using D over
> Python for this sort of problem.

Isn't D compiled to machine code? I would expect it to win hands down.
That is, unless it is horribly unoptimized.

Matt


From s.mientki at id.umcn.nl  Tue Sep 25 06:46:20 2007
From: s.mientki at id.umcn.nl (stef)
Date: Tue, 25 Sep 2007 12:46:20 +0200
Subject: ANN: PyPE 2.8.7
In-Reply-To: <f082a$46f8e4f1$83aef404$21115@news1.tudelft.nl>
References: <mailman.1037.1190715307.2658.python-list@python.org>
	<f082a$46f8e4f1$83aef404$21115@news1.tudelft.nl>
Message-ID: <b0514$46f8e6fc$83aef404$21614@news1.tudelft.nl>

Another problem,
I tried to run PyPE in my "old IDE",
and get the following error:

Traceback (most recent call last):
  File "D:\temp\PyPE-2.8.7-src\PyPE-2.8.7\pype.py", line 20, in ?
    wxversion.ensureMinimal(v)
  File "P:\Python\lib\site-packages\wxversion.py", line 178, in 
ensureMinimal
    raise VersionError("wxversion.ensureMinimal() must be called before 
wxPython is imported")
VersionError: wxversion.ensureMinimal() must be called before wxPython 
is imported
> cheers,
> Stef Mientki


From bjourne at gmail.com  Mon Sep 17 05:16:06 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Mon, 17 Sep 2007 11:16:06 +0200
Subject: SVG to raster conversion.
In-Reply-To: <46ED5283.3030004@sdf.lonestar.org>
References: <46ED5283.3030004@sdf.lonestar.org>
Message-ID: <740c3aec0709170216w6642d414g5e3f9052924a1c38@mail.gmail.com>

On 9/16/07, J. Cliff Dyer <jcd at sdf.lonestar.org> wrote:
> Does anybody know a good solution (preferably in python) for rasterizing
> SVG or other vector graphics.
>
> I'm thinking something like
>
> vector_image = SVGFile(path_to_image)
> raster_image = vector_image.rasterize(format, (width, height), dpi)
> raster_image.write(out_file)
>
> Thanks for any pointers you might have.

Use rsvg:

import rsvg
h = rsvg.Handle('svg-file.svg')
pixbuf = h.get_pixbuf()
pixbuf.save('foobar.png', 'png')

-- 
mvh Bj?rn


From Scott.Daniels at Acm.Org  Tue Sep 11 08:58:27 2007
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Tue, 11 Sep 2007 05:58:27 -0700
Subject: Enum class with ToString functionality
In-Reply-To: <1189416537.050002.61120@r34g2000hsd.googlegroups.com>
References: <1189416537.050002.61120@r34g2000hsd.googlegroups.com>
Message-ID: <13ed45rfqtgqvf0@corp.supernews.com>

bg_ie at yahoo.com wrote:
> Hi,
> 
> I have the following class -
> 
> class TestOutcomes:
>     PASSED = 0
>     FAILED = 1
>     ABORTED = 2
> 
> plus the following code -
> 
> testResult = TestOutcomes.PASSED
> 
> testResultAsString
> if  testResult == TestOutcomes.PASSED:
>     testResultAsString = "Passed"
> elif testResult == TestOutcomes.FAILED :
>     testResultAsString = "Failed"
> else:
>     testResultAsString = "Aborted"
> 
> But it would be much nicer if I had a function to covert to string as
> part of the TestOutcomes class. How would I implement this?
> 
> Thanks,
> 
> Barry
> 

     class Outcome(object):
         PASSED, FAILED, ABORTED = range(3)

         @classmethod
         def named(class_, value):
             for name in dir(class_):
                 if name[0] != '_' and getattr(class_, name) == value:
                     return name
             raise ValueError('Unknown value %r' % value)

     Outcome.named(2)


-Scott David Daniels
Scott.Daniels at Acm.Org


From gagsl-py2 at yahoo.com.ar  Fri Sep  7 06:16:46 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 07 Sep 2007 07:16:46 -0300
Subject: How to convert None to null value
References: <eb3f41b30709070219h1b32aacj8f6daac23cd02807@mail.gmail.com>
Message-ID: <op.tx9358ttx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 07 Sep 2007 06:19:25 -0300, pradeep kumar <staris28 at gmail.com>  
escribi?:

> i am trying to insert records from one table to another table in postgres
> sql using the the following code
>
> posConn.query("insert into
> usr(usr_id,usr_name,usr_passwd,grp_cde,usr_type,usr_chk_till_val, \
>
> usr_active,usr_daily_auth,usr_lst_login,usr_lst_logout,usr_shift_id,usr_role_level)
> values \
>              ('%s','%s','%s',%s,%i,%d,'%s',%i,%i,%i,%i,%i)"
> %(row[0],row[1],row[2],row[3],row[4],row[5], \
>               row[7],row[8],row[10],row[11],row[12],row[14]) )
>
> here row[4] column is having null value so python consides it as None but
> will insert into the table it inserts as None not null value

- You are building the sql statement "by hand": don't do that. The query  
method receives two arguments: an sql template with placeholders, and a  
tuple of arguments. This way, None objects are correctly translated into  
NULL values, embedded quotes are correctly handled, etc. An important  
point is security - building the sql statement by hand may open the door  
to sql injection attacks.
See <http://www.python.org/dev/peps/pep-0249/> for details.

- You don't need those \ for line continuation: any expression containing  
an open ( [ { automatically continues on the following lines until all ) ]  
} are closed.

- Python automatically joins contiguous strings.

Combining all the above:

posConn.query("insert into usr "
    "(usr_id,usr_name,usr_passwd,grp_cde,usr_type,"
    "usr_chk_till_val,usr_active,usr_daily_auth,"
    "usr_lst_login,usr_lst_logout,usr_shift_id,"
    "usr_role_level) values "
    "(%s,%s,%s,%s,%i,%d,%s,%i,%i,%i,%i,%i)" ,
    (row[0],row[1],row[2],row[3],row[4],row[5],
     row[7],row[8],row[10],row[11],row[12],row[14]))

Note the TWO arguments to the query method: all those string fragments are  
joined into a single string, followed by a comma, and a tuple containing 6  
parameters.

Parameter markers may be %s,%s,%s... as above, or :1,:2,:3... or ?,?,?...
The exact syntax depends on your specific database adapter - you'll have  
to read its documentation.

-- 
Gabriel Genellina



From georgerxz at gmail.com  Sun Sep 16 04:46:34 2007
From: georgerxz at gmail.com (GeorgeRXZ)
Date: Sun, 16 Sep 2007 01:46:34 -0700
Subject: Try this
Message-ID: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>

If you have Microsoft windows 98/2000/ME/XP/2003 Operating System on
your PC.
Then Open the Notepad and type the following sentence, and save the
file and close the notepad. Now reopen the file and you will find out
that, Notepad is not able to save the following text line.

Well you are speed

This occurs not only with above sentence but any sentence that has

4 3 3 5 (sequence of characters: Well=4 you=3 are=3 speed=5)

When type following sentence and save file then same thing occurs.

This is not Maria


GEOrgE
<< Develop a website that will help people,
Avoid spamming, provide quality contents on your website >>

http://zsoftwares.googlepages.com/index.htm



From sjmachin at lexicon.net  Sun Sep 16 16:14:13 2007
From: sjmachin at lexicon.net (John Machin)
Date: Sun, 16 Sep 2007 13:14:13 -0700
Subject: Try this
In-Reply-To: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>
References: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>
Message-ID: <1189973653.462130.326280@22g2000hsm.googlegroups.com>

On Sep 16, 6:46 pm, GeorgeRXZ <george... at gmail.com> wrote:
> If you have Microsoft windows 98/2000/ME/XP/2003 Operating System on
> your PC.
> Then Open the Notepad and type the following sentence, and save the
> file and close the notepad. Now reopen the file and you will find out
> that, Notepad is not able to save the following text line.
>
> Well you are speed
>
> This occurs not only with above sentence but any sentence that has
>
> 4 3 3 5 (sequence of characters: Well=4 you=3 are=3 speed=5)
>
> When type following sentence and save file then same thing occurs.
>
> This is not Maria
>
> GEOrgE

OMG it's mutating - I typed in just one 6-letter word ("donkey") and
saved it and opened it again and it had become 3 ****ese characters.

Code Four! [1]
Man the barricades!
Send round the fiery cross!
Aux armes, citoyens! Formez vos bataillons!

Hang on a minute, by the dawn's early light (it's 06:00 here) the
characters look like a tri-zapper Dalek, a WW2 tank, and the sheep
character with a "wood" radical. Uh-huh. Looks like they're going to
attack some place using a Trojan sheep. Could only be NZ. Who cares?
Panic over.

====

[1] "1 if by land, 2 if by sea, 3 if by air, 4 if by internet"



From XX.XmcX at XX.XmclaveauX.com  Mon Sep  3 00:59:48 2007
From: XX.XmcX at XX.XmclaveauX.com (MC)
Date: Mon, 03 Sep 2007 06:59:48 +0200
Subject: [python-win32] How can I get the parentWindow.document object?
References: <1188695505.993750.180020@19g2000hsx.googlegroups.com>
Message-ID: <mn.19a37d79b4a1bd42.46195@XX.XmclaveauX.com>

Hi!

> ie = win32com.client.Dispatch("InternetExplorer.Application")
> doc=ie.Document.parentWindow.document

Use bridge variable :
   window=ie.Document.parentWindow
And work with :
   print window.Document.body.name








-- 
@-salutations

Michel Claveau




From gagsl-py2 at yahoo.com.ar  Tue Sep 18 03:34:24 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 18 Sep 2007 04:34:24 -0300
Subject: The meaning of a = b in object oriented languages
References: <1190094057.976729.285120@n39g2000hsh.googlegroups.com>
	<f517e32aa6ad5d39debdff7b6dc84685@ruby-forum.com>
	<1190098656.030658.66380__39607.8769270845$1190098987$gmane$org@57g2000hsv.googlegroups.com>
Message-ID: <op.tyt9zmfgx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Tue, 18 Sep 2007 03:57:36 -0300, Summercool <Summercoolness at gmail.com>  
escribi?:

> i think the line
>
> a = "different"
>
> means a is now set to a pointer to the String object with content
> "different".
> or that "a is now a reference to the String object."
>
> and b is still a reference to the Array object.  so that's why a and b
> print out different things.  they point to different objects.
>
> i think:
>
> whenever in Ruby, Python, and Java,
>
> a is never an object.  a is always a "reference to an object"...  this
> will solve a lot of puzzles when we don't understand some code
> behaviors.

Yes, but extrapolating that to "In OOPL, a=b just copies a reference" is  
wrong.
"Old" languages like Fortran use the "boxed" model, and "modern" languages  
tend to use the "reference" model, and since OO languages are younger...
But this rather old post by Alex Martelli explains it better  
<http://mail.python.org/pipermail/python-list/2001-April/077544.html>

-- 
Gabriel Genellina



From grante at visi.com  Tue Sep 11 16:53:00 2007
From: grante at visi.com (Grant Edwards)
Date: Tue, 11 Sep 2007 20:53:00 -0000
Subject: Difference between two times (working ugly code, needs polish)
References: <mailman.405.1189543618.2658.python-list@python.org>
Message-ID: <13ee01cfc7f4be2@corp.supernews.com>

On 2007-09-11, Shawn Milochik <Shawn at Milochik.com> wrote:

> I have done what I wanted, but I think there must be a much better way.

See the strptime() function in either the time or the datetime
modules:

http://docs.python.org/lib/module-time.html
http://docs.python.org/lib/module-datetime.html

-- 
Grant Edwards                   grante             Yow! Here we are in America
                                  at               ... when do we collect
                               visi.com            unemployment?


From s.mientki at id.umcn.nl  Wed Sep 26 03:50:21 2007
From: s.mientki at id.umcn.nl (stef)
Date: Wed, 26 Sep 2007 09:50:21 +0200
Subject: ANN: PyPE 2.8.7
In-Reply-To: <1190782361.392001.48790@g4g2000hsf.googlegroups.com>
References: <mailman.1037.1190715307.2658.python-list@python.org>
	<f082a$46f8e4f1$83aef404$21115@news1.tudelft.nl>
	<1190782361.392001.48790@g4g2000hsf.googlegroups.com>
Message-ID: <b39cf$46fa0f3f$83aef404$19681@news1.tudelft.nl>

thebjorn wrote:
> On Sep 25, 12:37 pm, stef <s.mien... at id.umcn.nl> wrote:
>   
>> Josiah Carlson wrote:
>>     
>>> === What is PyPE? ===
>>> PyPE (Python Programmers' Editor) was written in order to offer a
>>> lightweight but powerful editor for those who think emacs is too much
>>> and idle is too little. Syntax highlighting is included out of the box,
>>> as is multiple open documents via tabs.
>>>       
>> sounds very good,
>> so now I want to try it ...
>> ... the windows ansi zip file is corrupted :-(
>> ... the unicode version crashes :-(
>>
>> This is what the log file tells:
>> Traceback (most recent call last):
>>   File "pype.py", line 110, in ?
>>   File "zipextimporter.pyc", line 78, in load_module
>>   File "configuration.pyc", line 149, in ?
>> Exception: Unable to create config directory: 'G:\\.pype'
>>
>> I don't have a G-drive ;-)
>>
>> cheers,
>> Stef Mientki
>>     
>
> You must be doing it wrong. 
Of course ;-)
but what am I doing wrong ?
cheers,
Stef
> Works flawlessly for me (no g: drive here
> either) -- well, except that it doesn't have Emacs keybindings <wink>.
>
> -- bjorn
>
>   


From gagsl-py2 at yahoo.com.ar  Fri Sep 14 23:27:09 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 15 Sep 2007 00:27:09 -0300
Subject: subclass of integers
References: <1189780201.692192.291010@k79g2000hse.googlegroups.com>
	<1189811796.011837.75780@r29g2000hsg.googlegroups.com>
Message-ID: <op.tyoejjaax6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 14 Sep 2007 20:16:36 -0300, Dan Bishop <danb_83 at yahoo.com>  
escribi?:

> On Sep 14, 9:30 am, Mark Morss <mfmo... at aep.com> wrote:
>> I would like to construct a class that includes both the integers and
>> None.  I desire that if x and y are elements of this class, and both
>> are integers, then arithmetic operations between them, such as x+y,
>> return the same result as integer addition.  However if either x or y
>> is None, these operations return None.
>
> Rather than subclassing int, why not just make a singleton NaN object
> with overloaded arithmetic operators that all return NaN?

Like this:

class _NaN(object):

     __instance = None

     def __new__(cls):
         if cls.__instance is None:
             cls.__instance = super(_NaN, cls).__new__(cls)
         return cls.__instance

     __repr__ = __str__ = lambda self: 'NaN'

     def unop(self): return self
     def binop(self, other): return self
     def terop(self, other, unused=None): return self
     def false2(self, other): return False
     def true2(self, other): return True
     def notimpl(self): return NotImplemented

     __abs__ = __invert__ = __neg__ = __pos__ = unop
     __add__ = __and__ = __div__ = __divmod__ = __floordiv__ = __lshift__ =  
__mod__ = __mul__ = __rshift__ = __or__ = __sub__ = __truediv__ = __xor__  
= binop
     __radd__ = __rand__ = __rdiv__ = __rdivmod__ = __rfloordiv__ =  
__rlshift__ = __rmod__ = __rmul__ = __rpow__ = __rrshift__ = __ror__ =  
__rsub__ = __rtruediv__ = __rxor__ = binop
     __pow__ = terop
     __lt__ = __le__ = __eq__ = __gt__ = __ge__ = false2
     __ne__ = true2

     del unop, binop, terop, false2, true2, notimpl

NaN = _NaN()

def test():
     assert NaN + 1 is NaN
     assert 1 & NaN is NaN
     assert NaN * NaN is NaN

     assert abs(NaN) is NaN
     assert str(NaN)=="NaN"
     assert repr(NaN)=="NaN"

     assert not (NaN==NaN)
     assert (NaN!=NaN)
     assert not (NaN>NaN)
     assert not (NaN<NaN)
     assert not (NaN>=NaN)
     assert not (NaN<=NaN)

     assert not (NaN==1)
     assert (NaN!=1)
     assert not (NaN>1)
     assert not (NaN<1)
     assert not (NaN>=1)
     assert not (NaN<=1)

     assert not (1==NaN)
     assert (1!=NaN)
     assert not (1>NaN)
     assert not (1<NaN)
     assert not (1>=NaN)
     assert not (1<=NaN)

     assert cmp(NaN, 1)!=0
     assert cmp(1, NaN)!=0
     #assert cmp(NaN, NaN)!=0

     assert NaN is _NaN()
     assert NaN is type(NaN)()

test()



-- 
Gabriel Genellina



From arkanes at gmail.com  Mon Sep 10 10:24:12 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Mon, 10 Sep 2007 09:24:12 -0500
Subject: Checking if elements are empty
In-Reply-To: <slrnfead5j.mo.horpner@FIAD06.norwich.edu>
References: <2323A6D37908A847A7C32F1E3662C80E010A0246@dc1ex01.air.org>
	<fbme5d$qa$1@sea.gmane.org>
	<mailman.93.1189003016.2658.python-list@python.org>
	<fbqedh$31g$1@lust.ihug.co.nz>
	<46e115e5$0$7691$9b4e6d93@newsspool2.arcor-online.net>
	<fbsqqs$efc$2@lust.ihug.co.nz>
	<46e2013a$0$7687$9b4e6d93@newsspool2.arcor-online.net>
	<slrnfead5j.mo.horpner@FIAD06.norwich.edu>
Message-ID: <4866bea60709100724k5834823cm2ab0eaa068b20090@mail.gmail.com>

On 9/10/07, Neil Cerutti <horpner at yahoo.com> wrote:
> On 2007-09-08, Wildemar Wildenburger <lasses_weil at klapptsowieso.net> wrote:
> > Lawrence D'Oliveiro wrote:
> >>>>> if y[0]:
> >>>> Not a good idea.
> >>> Why not?
> >>
> >> Because there is a situation where your version of the test
> >> will fail even if the first element of y is non-null.
> >
> > Such as? Seriously people, a little more verbosity wouldn't
> > hurt here. This isn't a mystery game.
>
> >>> if "": True
> ...
> >>> if 0: True
> ...
> >>> if []: True
> ...
> >>> if {}: True
> ...
> >>> if None: True
> ...
>
> That's may not be all the possibilities. Lots of Python objects
> can evaluate to false in a boolean context.
>

All of these except 0 and None will also return False if you check the
length. In fact, I am not aware of any builtin where len() will return
0, but it will be true in a boolean context.

If you're advocating being more specific in the hope of catching
errors, this is a pretty terrible example. The OP wasn't checking for
"null", whatever that means - he was checking for the empty string, in
a list known (or intended) to contain only strings. The simple boolean
check is totally appropriate.


From istvan.albert at gmail.com  Mon Sep 24 14:38:52 2007
From: istvan.albert at gmail.com (Istvan Albert)
Date: Mon, 24 Sep 2007 18:38:52 -0000
Subject: Newbie completely confused
In-Reply-To: <mailman.997.1190649060.2658.python-list@python.org>
References: <mailman.876.1190392492.2658.python-list@python.org>
	<IE4Ji.117838$pR1.5801002@phobos.telenet-ops.be>
	<mailman.997.1190649060.2658.python-list@python.org>
Message-ID: <1190659132.073599.99190@k79g2000hse.googlegroups.com>

Two comments,

> ...
> self.item3 = float(foo[c]); c+=1
> self.item4 = float(foo[c]); c+=1
> self.item5 = float(foo[c]); c+=1
> self.item6 = float(foo[c]); c+=1
> ...

this here (and your code in general) is mind boggling and not in a
good way,

as for you original question, I don't think that reading in files of
the size you mention can cause any substantial problems, I think the
problem is somewhere else,

you can run the code below to see that the read times are unaffected
by the order   of processing

----------

import timeit

# make a big file
NUM= 10**5
fp = open('bigfile.txt', 'wt')
longline = ' ABC '* 60 + '\n'
for count in xrange( NUM ):
    fp.write( longline )
fp.close()

setup1 = """
def readLines():
    data = []
    for line in file('bigfile.txt'):
        data.append( line )
    return data
"""

stmt1 = """
data = readLines()
"""

stmt2 = """
data = readLines()
data = readLines()
"""

stmt3 = """
data = file('bigfile.txt').readlines()
"""

def run( setup, stmt, N=5 ):
    t = timeit.Timer(stmt=stmt, setup=setup)
    msec = 1000 * t.timeit(number=N)/N
    print "%f msec/pass" % msec

if __name__ == '__main__':
    for stmt in (stmt1, stmt2, stmt3):
        run(setup=setup1, stmt=stmt)





From pablo at decode.com.ar  Sat Sep 29 19:32:54 2007
From: pablo at decode.com.ar (Pablo Ziliani)
Date: Sat, 29 Sep 2007 20:32:54 -0300
Subject: Program inefficiency?
In-Reply-To: <1191089606.852125.276040@22g2000hsm.googlegroups.com>
References: <1191079347.192272.240540@22g2000hsm.googlegroups.com>	<1191087234.915654.182370@k79g2000hse.googlegroups.com>	<mailman.1284.1191088565.2658.python-list@python.org>
	<1191089606.852125.276040@22g2000hsm.googlegroups.com>
Message-ID: <46FEE0A6.2080405@decode.com.ar>

thebjorn wrote:
> On Sep 29, 7:55 pm, Pablo Ziliani <pa... at decode.com.ar> wrote:
>   
>> thebjorn wrote:
>>     
>>> Ugh, that was entirely too many regexps for my taste :-)
>> Oh yeah, now it's clear as mud.
>>     
>
> I'm anxiously awaiting your beacon of clarity ;-)
>   

Admittedly, that was a bit arrogant from my part. Sorry.

>> I do think that the whole program shouldn't take more than 10 lines of
>> code
>>     
>
> Well, my mass_replace above is 10 lines, and the actual replacement
> code is a one liner. Perhaps you'd care to illustrate how you'd
> shorten that while still keeping it "clear"?
>   

I don't think he relevant code was only those 10 lines, but well, you 
have already responded to the other question yourself in a subsequent 
post (thanks for saving me a lot of time).
I think that "clear" is a compromise between code legibility (most of 
what you sacrifice using regexes) and overall code length. Even regexes 
can be legible enough when they are well documented, not to mention the 
fact that is an idiom common to various languages.

>> using one sensible regex
>>     
>
> I have no doubt that it would be possible to do with a single regex.
> Whether it would be sensible or not is another matter entirely...
>   

Putting it in those terms, I completely agree with you (that's why I 
suggested letting e.g. BeautifulSoup deal with them). But by "sensible" 
I meant something different, inherent to the regex itself.
For instance, I don't think I need to explain to you why this is not 
sensible: (href=|HREF=)+(.*)(#)+(.*)(\w\'\?-<:)+(.*)(">)+


>   
>> (impossible to define without knowing the real input and output formats).
>>     
>
> Of course, but I don't think you can guess too terribly wrong. My
> version handles upper and lower case attributes, quoting with single
> (') and double (") quotes, and any number of spaces in attribute
> values. It maintains all other text as-is, and converts spaces to
> underscores in href and name attributes. Did I get anything majorly
> wrong?
>   

Well, you spent some time interpreting his code. No doubt you are smart, 
but being a lazy person (not proud of that, unlike other people stating 
the same) I prefer leaving that part to the interested party.


>   
>> And (sorry to tell) I'm convinced this is a problem for regexes, in
>> spite of anybody's personal taste.
>>     
>
> Well, let's see it then :-)

IMO, your second example proves it well enough.

FWIW I did some changes to your code (see attached), because it wasn't 
taking into account the tag name (<a>), and the names of the attributes 
(href, name) can appear in other tags as well, so it's a problem. It 
still doesn't solve the problem of one tag having both attributes with 
spaces (which can be easily fixed with a second regex, but that was out 
of question :P), and there can be a lot of other problems (both because 
I'm far from being an expert in regexes and because I only tested it 
against the given string), but should provide at least some guidance.
I made it also match the id of the target anchor, since a fragment can 
point both to its name or its id, depending on the doctype.


Regards,
Pablo
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From steve at holdenweb.com  Fri Sep 28 15:08:25 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 28 Sep 2007 15:08:25 -0400
Subject: Python 3.0 migration plans?
In-Reply-To: <1191004803.604547.213280@o80g2000hse.googlegroups.com>
References: <1191002679.569709.16870@22g2000hsm.googlegroups.com>	<mailman.1242.1191003389.2658.python-list@python.org>
	<1191004803.604547.213280@o80g2000hse.googlegroups.com>
Message-ID: <fdjjf9$bpa$1@sea.gmane.org>

TheFlyingDutchman wrote:
> On Sep 28, 11:16 am, Jean-Paul Calderone <exar... at divmod.com> wrote:
>> On Fri, 28 Sep 2007 11:04:39 -0700, TheFlyingDutchman <zzbba... at aol.com> wrote:
>>> [snip]
>>> In this case I asked it as part of the original question and it was
>>> ignored. I have programmed in C and C++ and a little Pascal many years
>>> ago. I don't remember anything about Higher Order Functions and would
>>> like to see exactly how you do it and to verify the contention.
>> Perhaps you could do a bit of independent research.  Then your messages
>> to the group could contain more thoughtful questions and responses.
>>
> But you miss the fact that I am providing value to the group by
> providing unthoughtful questions and unthoughtful responses. By having
> most of the pocket protectors being thrown at me, I provide a
> diversion that allows others to speak more freely and without fear of
> reproach.
> 
> 
It's the knives and hand grenades you want to worry about. We are a very 
friendly and welcoming group, but we do have our limits. You're fast 
approaching 100% on my trollometer.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From kyosohma at gmail.com  Thu Sep  6 14:16:54 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 06 Sep 2007 18:16:54 -0000
Subject: Getting original working directory
In-Reply-To: <mailman.155.1189092379.2658.python-list@python.org>
References: <mailman.155.1189092379.2658.python-list@python.org>
Message-ID: <1189102614.459515.206700@57g2000hsv.googlegroups.com>

On Sep 6, 10:19 am, rave247 rave247 <rave... at seznam.cz> wrote:
> Hi,
>
> I' am unable to solve this problem. I've got python program, it is installed in standard location. I run this program from some location X (note that I just type relative "myscript", leaving operating system to look up script itself using PATH variable) and this program somewhere in the code calls os.chdir() to change it is current working directory and I would need in python code to get the *original* directory location *after* os.chdir() is performed. This means the location X from which script was performed - it is the location I am in after script is finished.
>
> Thanks for any help


One of the best portable ones that I've seen used is this:

os.path.abspath(os.path.join(os.path.dirname(sys.argv[0]),'.'))

I've used it myself and it works for my needs.

Mike




From see.signature at no.spam  Wed Sep  5 03:49:43 2007
From: see.signature at no.spam (Eric Brunel)
Date: Wed, 05 Sep 2007 09:49:43 +0200
Subject: Tkinter(2)
References: <1188913329.457394.94220@g4g2000hsf.googlegroups.com>
Message-ID: <op.tx5705gqwepdt4@ericb.pragmadev>

On Tue, 04 Sep 2007 15:42:09 +0200, vijayca <vijayeee at gmail.com> wrote:

> my python installation is:Active python 2.5.1
> i am using Red Hat Linux
> i have the Tkinter module installed but any simple script produces an
> error....
>
> script:
> from Tkinter import Label
> widget = Label(None, text='Hello GUI world!')
> widget.pack()
> widget.mainloop()
>
>
> error:
> Traceback (most recent call last):
>   File "guy.py", line 2, in <module>
>     widget = Label(None, text='Hello GUI world!')
>   File "/root/Desktop/pythonall/ActivePython-2.5.1.1-linux-x86/
> INSTALLDIR/lib/python2.5/lib-tk/Tkinter.py", line 2464, in __init__
>     Widget.__init__(self, master, 'label', cnf, kw)
>   File "/root/Desktop/pythonall/ActivePython-2.5.1.1-linux-x86/
> INSTALLDIR/lib/python2.5/lib-tk/Tkinter.py", line 1923, in __init__
>     BaseWidget._setup(self, master, cnf)
>   File "/root/Desktop/pythonall/ActivePython-2.5.1.1-linux-x86/
> INSTALLDIR/lib/python2.5/lib-tk/Tkinter.py", line 1898, in _setup
>     _default_root = Tk()
>   File "/root/Desktop/pythonall/ActivePython-2.5.1.1-linux-x86/
> INSTALLDIR/lib/python2.5/lib-tk/Tkinter.py", line 1636, in __init__
>     self.tk = _tkinter.create(screenName, baseName, className,
> interactive, wantobjects, useTk, sync, use)
> _tkinter.TclError: no display name and no $DISPLAY environment
> variable

Basically, this error has nothing to do with Python or Tkinter. If you  
tried to launch any GUI application, you should get the same error.

How are you logged in to your computer? Did you do any remote connection  
via telnet, or rlogin/rsh, or ssh? This error usually happens when you're  
logged in on a remote machine, and you didn't tell the remote machine  
where you wanted to display the windows you open. It may also happen when  
you're logged in as a user, but did a 'su' to change your identity.

In any case, solving the problem is quite easy: define the DISPLAY  
environment variable with the value <your computer name or IP address>:0  
and it should work. If you're using a remote machine, you may also have to  
issue a 'xhost + <remote machine name or IP address>' on the local machine  
(the one where the display should occur).

HTH
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From sjmachin at lexicon.net  Wed Sep 12 19:48:01 2007
From: sjmachin at lexicon.net (John Machin)
Date: Wed, 12 Sep 2007 16:48:01 -0700
Subject: cpython list __str__ method for floats
In-Reply-To: <Xns99A98E5B893ACduncanbooth@127.0.0.1>
References: <13ectngf3aeqrb0@corp.supernews.com>
	<5kndseF4iskqU1@mid.individual.net>
	<13eehfo8nr5eu1d@corp.supernews.com>
	<5kq2n9F4uhr0U1@mid.individual.net>
	<Xns99A98E5B893ACduncanbooth@127.0.0.1>
Message-ID: <1189640881.953654.19610@y42g2000hsy.googlegroups.com>

On Sep 12, 10:59 pm, Duncan Booth <duncan.bo... at invalid.invalid>
wrote:>

[snip]

> I believe the claim is that using the full 17 digits ensures the round-
> tripping works even if you serialise and deserialise on different
> systems, so perhaps we all pay a cost in our interactive sessions for
> something which should really be buried deep in IPC code.

IPC? Most data transfer between systems in the real world is done
using CSV files :-)



From panguohualove at sina.com  Sat Sep 29 07:17:33 2007
From: panguohualove at sina.com (panguohua)
Date: Sat, 29 Sep 2007 04:17:33 -0700
Subject: earn $12800 a month
Message-ID: <1191064653.603143.104680@w3g2000hsg.googlegroups.com>

www.space666.com



From hyena at gmail.com  Mon Sep 24 18:49:05 2007
From: hyena at gmail.com (hyena)
Date: Tue, 25 Sep 2007 00:49:05 +0200
Subject: is there some module update(install tools)?
Message-ID: <8520e$46f83ee4$4df9f6c6$14843@news2.tudelft.nl>

Hi,

   I am quite new to python and am looking for some tools that can 
install and update modules a bit more intelligent then "python setup.py 
install". Is there some thing like "yum" in fedora which can search and 
install/update packages automatically?

thanks in advance!


From liangxuliang79 at gmail.com  Wed Sep  5 08:03:33 2007
From: liangxuliang79 at gmail.com (liangxuliang79 at gmail.com)
Date: Wed, 05 Sep 2007 05:03:33 -0700
Subject: =?gb2312?B?udjT2tPDdXJsbGliIHBvc3TP+8+itcTOyszioaM=?=
Message-ID: <1188993813.330662.174660@w3g2000hsg.googlegroups.com>

??www.mmmppp333.com?????http://ishare.iask.sina.com.cn/cgi-bin/
fileid.cgi?fileid=844050
???post fileid=844050????

??post??????fileid=844050???server?????header?header??local??location??
???????????????????????mp3??????????????local??????mp3?????????????????
???????????????

???????python?urllib????urllib????????????local????????local????mp3????
????????mp3.?

?post????/download.php? post????fileid=844050??????????????????????????
??????????web???????????

From fructidor00 at gmail.com  Sun Sep  9 09:28:57 2007
From: fructidor00 at gmail.com (GuillaumeC)
Date: Sun, 09 Sep 2007 13:28:57 -0000
Subject: Organizing Code - Packages
In-Reply-To: <1189296296.175857.158770@22g2000hsm.googlegroups.com>
References: <1189177596.960379.244990@w3g2000hsg.googlegroups.com>
	<46e17143$0$6189$426a74cc@news.free.fr>
	<1189183088.922537.18290@r34g2000hsd.googlegroups.com>
	<87r6laa0ir.fsf@rudin.co.uk>
	<46e1a0bc$0$7689$9b4e6d93@newsspool2.arcor-online.net>
	<1189280539.449868.169910@22g2000hsm.googlegroups.com>
	<mailman.281.1189283755.2658.python-list@python.org>
	<1189296296.175857.158770@22g2000hsm.googlegroups.com>
Message-ID: <1189344537.561864.72120@k79g2000hse.googlegroups.com>

On Sep 9, 1:04 am, xkenneth <xkenn... at gmail.com> wrote:
> On Sep 8, 3:35 pm, David <wizza... at gmail.com> wrote:
>
> > > How do import statements that are declared at the top of a python
> > > module work?
>
> >http://docs.python.org/tut/node8.html
> On Sat, 08 Sep 2007 12:42:19 -0700, xkenneth wrote:
> > How do import statements that are declared at the top of a python
> > module work?
>
> They import the module.  ;-)

Well, not only... They also include the names in the namespace. Using
the "import * from" form will bind in each of your modules the name of
the errors. You should use import XXX and then use the qualified name
XXX.myfunction. Then, you avoid conflicts between names and binding
every name from your module. See the documentation for reload() also.

>   Also, are there any good tutorials/examples out there of how to
> organize your python code into packges?

This is not new, nor specific to Python, but I think it is a good
reference:
http://www.objectmentor.com/resources/articles/Principles_and_Patterns.pdf
see section: Principles of Package Architecture




From lobais at gmail.com  Fri Sep 14 01:57:49 2007
From: lobais at gmail.com (Thomas Dybdahl Ahle)
Date: Fri, 14 Sep 2007 07:57:49 +0200
Subject: distutils install-data-hook
Message-ID: <pan.2007.09.14.05.57.48@gmail.com>

Hey
I have this pythonapp I'm trying to pack, and I've read in the Gnome 
specifications that I should run "update-icon-cache" after install, in 
order to get the menus and stuff correctly updated.

Is there a way to specify a (list of) commands to be run after 
installation?


From dijkstra.arjen at gmail.com  Mon Sep 17 09:00:41 2007
From: dijkstra.arjen at gmail.com (duikboot)
Date: Mon, 17 Sep 2007 13:00:41 -0000
Subject: simple regular expression problem
Message-ID: <1190034041.796626.66790@n39g2000hsh.googlegroups.com>

Hello,

I am trying to extract a list of strings from a text. I am looking it
for hours now, googling didn't help either.
Could you please help me?

>>>s = """ \n<organisatie>\n<Profiel_Id>28996</Profiel_Id>\n</organisatie>\n<organisatie>\n<Profiel_Id>28997</Profiel_Id>\n</organisatie>"""
>>> regex = re.compile(r'<organisatie.*</organisatie>', re.S)
>>> L = regex.findall(s)
>>> print L
['organisatie>\n<Profiel_Id>28996</Profiel_Id>\n</organisatie>
\n<organisatie>\n<Profiel_Id>28997</Profiel_Id>\n</organisatie']

I expected:
[('organisatie>\n<Profiel_Id>28996</Profiel_Id>\n</organisatie>
\n<organisatie>), (<organisatie>\n<Profiel_Id>28997</Profiel_Id>\n</
organisatie')]

I must be missing something very obvious.

Greetings Arjen



From bj_666 at gmx.net  Fri Sep 14 10:38:16 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 14 Sep 2007 14:38:16 GMT
Subject: recursion
References: <fcbfnj$lh4$1@ss408.t-com.hr>
	<slrnfeinvk.1cc.horpner@FIAD06.norwich.edu>
	<mailman.491.1189700115.2658.python-list@python.org>
	<slrnfeit3k.1lg.horpner@FIAD06.norwich.edu>
	<fcdrv9$7lr$1@ss408.t-com.hr>
	<mailman.532.1189774061.2658.python-list@python.org>
	<fce42o$sig$1@ss408.t-com.hr>
Message-ID: <5kvkmoF5h7l3U2@mid.uni-berlin.de>

On Fri, 14 Sep 2007 15:58:39 +0200, Gigs_ wrote:

>  >>> def factorial(n):
>     print "n =", n
>     if n==0:
>         return 1
>     else:
>         return n * factorial(n-1)
> 
>  >>> factorial(3)
> n = 3
> n = 2
> n = 1
> n = 0
> 6
> 
> 
> now i understand. but one question at the end this function return 1. how python 
> knows that it needs to multiply 1 with all recursive returns. (why python didnt 
> sum recursive return with 1?)

Because there is a ``*`` and not a ``+`` in the last line of the function.

Let's play this through (I abbreviate the function name to just `f()`):

Execution of f(3) leads to the second return:

r1 f(3):  return 3 * f(2)

This multiplication can't take place until ``f(2)`` is calculated so the
current function call is "suspended" and evaluated later, when the result
of ``f(2)`` is known.  The call in that line is replaces with the result
then.  Calling ``f(2)`` leads to:

r2 f(2):  return 2 * f(1)

The same again, another call to `f()` with 1 as argument:

r3 f(1):  return 1 * f(0)

Now the last call takes the other ``if`` branch:

r4 f(0):  return 1

The 1 is returned to the previus call:

r3 f(1):  return 1 * 1

This can be evaluated now and is returned to its caller:

r2 f(2):  return 2 * 1

Again this is evaluated and returned to its caller:

r1 f(3):  return 3 * 2

And here we have the final result that is returned from the first call to
`f()`.

Ciao,
	Marc 'BlackJack' Rintsch


From israel at math.MyUniversitysInitials.ca  Sun Sep 30 19:51:06 2007
From: israel at math.MyUniversitysInitials.ca (Robert Israel)
Date: Sun, 30 Sep 2007 18:51:06 -0500
Subject: [Python] Matrix convergence
References: <1191179438.736054.322700@o80g2000hse.googlegroups.com>
Message-ID: <rbisrael.20070930221207$4d15@news.ks.uiuc.edu>

Zhengzheng Pan <panzhengzheng at gmail.com> writes:

> Hi all,
> 
> I'm trying to check whether a (stochastic/transition) matrix
> converges, i.e. a function/method that will return True if the input
> matrix sequence shows convergence and False otherwise. The background
> is a Markov progress, so the special thing about the transition matrix
> is the values of elements in each row add up to be 1. Fail to find any
> relevant build-in methods in Python...
> 
> Currently the standard theorem on convergence in Markov chain
> literature is involved with the properties of aperiodic and
> connectivity, which I'm not able to implement with Python either...
> Therefore I'm actually also looking for alternative conditions to
> check for convergence, and am willing to sacrifice a little bit of
> precision.
> 
> If you have any ideas/suggestions on how to examine the convergence of
> a matrix in general or specifically about this kind of matrices, and
> are willing to share, that'd be really great.
>

Do you mean you have an n x n stochastic matrix T and you're trying to find
out whether the sequence T^j converges? 

Let A = (I + T)^(n-1) and B = T^((n-1)^2+1).  Powers of matrices are easy
to compute using repeated squaring.

i and j are in the same class iff A_{ij} > 0 and A_{ji} > 0.  A class
containing state i is recurrent iff A_{ij} = 0 for all j not in the class.

A recurrent class containing state i is aperiodic iff 
B_{ij} > 0 for all j in the class.

T^j converges iff all recurrent classes are aperiodic.  Thus the test
can be written as follows:
For each i, either there is some j for which A_{ij} > 0 but A_{ji} = 0, 
or there is no j for which A_{ij} > 0 but B_{ij} = 0.
-- 
Robert Israel              israel at math.MyUniversitysInitials.ca
Department of Mathematics        http://www.math.ubc.ca/~israel 
University of British Columbia            Vancouver, BC, Canada


From xah at xahlee.org  Mon Sep 10 18:57:30 2007
From: xah at xahlee.org (Xah Lee)
Date: Mon, 10 Sep 2007 15:57:30 -0700
Subject: encoding latin1 to utf-8
In-Reply-To: <1189427146.723304.270600@22g2000hsm.googlegroups.com>
References: <1189427146.723304.270600@22g2000hsm.googlegroups.com>
Message-ID: <1189465050.827331.211320@r34g2000hsd.googlegroups.com>

On Sep 10, 5:25 am, Harshad Modi <modii... at gmail.com> wrote:
> hello ,
>  I make one function for encoding latin1 to utf-8. but i think it is
> not work proper.
> plz guide me.

Hi, what you want is here, including complete code:

Converting a File's "Character Set" / Encoding
http://xahlee.org/perl-python/charset_encoding.html

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



From zzbbaadd at aol.com  Fri Sep 28 04:38:27 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Fri, 28 Sep 2007 01:38:27 -0700
Subject: Python 3.0 migration plans?
In-Reply-To: <5m3p1dFbl98pU1@mid.uni-berlin.de>
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>
	<87641v4j38.fsf@benfinney.id.au>
	<1190949502.875203.57690@w3g2000hsg.googlegroups.com>
	<5m3p1dFbl98pU1@mid.uni-berlin.de>
Message-ID: <1190968707.799398.232550@19g2000hsx.googlegroups.com>


>
> The fact that you compare and criticise the simple annotations like
> static or abstract with the much more powerful decorator concept shows
> that, despite being the maintainer of a
> soon-to-be-ruling-the-python-world Python 3 fork, lack understanding of
> even the most basic language features. Which isn't exactly news.[1]

Don't you mean "lack appreciation for the non-basic language
features"? static, class and abstract
are basic language features that I appreciate. "decorators" have been
in Python for only a small part of its existence, they aren't in the
vast majority of languages (if any other language even has them) which
means people write all kinds of software without them. Or rather, most
of the software ever written didn't use decorators. Doesn't sound
basic at all.

>
> Maybe you should start using python more and _then_ start discussions
> about it's features, when you have good grounds and can provide viable
> alternatives? But I guess that's a wish that won't be granted....

static and abstract keywords would seem to be very viable
alternatives. Viable enough that several language designers used them.



From ldo at geek-central.gen.new_zealand  Sun Sep  9 04:05:17 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sun, 09 Sep 2007 20:05:17 +1200
Subject: getting the current function
References: <mailman.229.1189182388.2658.python-list@python.org>
Message-ID: <fc09ft$cne$5@lust.ihug.co.nz>

In message <mailman.229.1189182388.2658.python-list at python.org>, Gary
Robinson wrote:

> I've just never liked the fact that you have to name the function when
> accessing those attributes from within the function.

If it's any consolation, it's not actually the function name you need to
refer to, merely any variable or Python object that happens to hold a
reference to the right function:

    >>> f = lambda x : x + x
    >>> f(2)
    4
    >>> f.myattr = "yeah"
    >>> g = f
    >>> g.myattr
    'yeah'
    >>> g = [f]
    >>> g[0].myattr
    'yeah'
    >>> g[0](3)
    6



From george.sakkis at gmail.com  Fri Sep 21 17:49:59 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 21 Sep 2007 21:49:59 -0000
Subject: I could use some help making this Python code run faster using
	only Python code.
In-Reply-To: <1190394011.148384.106280@q3g2000prf.googlegroups.com>
References: <1190325588.608625.259800@q3g2000prf.googlegroups.com>
	<1190328413.226577.206740@k79g2000hse.googlegroups.com>
	<1190330015.131971.265680@y42g2000hsy.googlegroups.com>
	<1190357165.381313.197910@19g2000hsx.googlegroups.com>
	<Xns99B25B0334892duncanbooth@127.0.0.1>
	<1190394011.148384.106280@q3g2000prf.googlegroups.com>
Message-ID: <1190411399.483431.86420@w3g2000hsg.googlegroups.com>

On Sep 21, 1:00 pm, Python Maniac <raych... at hotmail.com> wrote:

> My best runtime with Ruby using the same machine and OS was 67.797
> secs which is 29.8x slower than the fastest Python runtime.  This
> makes Ruby almost as slow as Python was made faster.  The irony with
> Ruby was that the use of a hash in Ruby actually made the Ruby code
> run slower than when a hash was not used.

I'm not familiar with Ruby but chances are that if you post at
c.l.ruby you'll get some good suggestions on how to speed up your ruby
code too (although the difference may not be so dramatic).

> Now I think I will code this little scrambler using nothing but the D
> Language just to see whether there is any benefit in using D over
> Python for this sort of problem.

And then you'll do it in assembly to see how much do you gain compared
to D ? If this is not just for learning purposes, perhaps you should
be thinking it the other way around: how fast is fast enough ?
Optimizing just for the sake of optimization, without a specific
performance goal in mind, is not the most productive way to do things
(again, leaving learning motivations aside).

George



From jcd at sdf.lonestar.org  Mon Sep 17 06:30:46 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Mon, 17 Sep 2007 06:30:46 -0400
Subject: Python "with"
In-Reply-To: <fclikb$blt$1@news2.carnet.hr>
References: <fck2di$7to$1@ss408.t-com.hr> <fcleos$2rt$1@news2.u-psud.fr>
	<fclikb$blt$1@news2.carnet.hr>
Message-ID: <46EE5756.7090107@sdf.lonestar.org>

Ivan Voras wrote:
> Laurent Pointal wrote:
>
>> The ugly part is the 'tmp' name, try to choose a name with a proper
>> meaning about what it is really, and it become clean and readable:
>>
>> filerefs = some.big.structure.or.nested.object.with.file.references
>> filerefs.encoding = "utf-8"
>> filerefs.name = "MyFileName.txt"
>> filerefs.use_quotes = True
>>
>> Isn't it ?
>
> Well, no, but this might be due to personal tastes. At least, I don't
> think it's better then some other alternatives. For example, in C99
> you can do:
>
> static struct option_s foo_option = {
>     .name = "foo",
>     .type = O_STRING,
>     .def_value = "default"
> };
>
> At least to me, this looks even better than the Pascal's syntax.
>
>
So basically, what you're saying is you don't like namespace prefixes at
all? 

Keeping your namespaces separate will help the clarity of your code
immensely, unless, arguably, you're doing heavy numerical processing,
goes the argument in a recent thread.  Probably what will help you the
most is not a fancy trick for getting rid of the namespace, but getting
over your aversion to them.  That will make you a better programmer, in
the long run.  Debugging will be easier, people will enjoy working with
your code more.  Clarity is beautiful.  Objectively so.  Not just some
lame "in the eye of the beholder" kind of beautiful.

Cheers,
Cliff


From fw3 at hotmail.co.jp  Fri Sep  7 12:42:42 2007
From: fw3 at hotmail.co.jp (wang frank)
Date: Fri, 07 Sep 2007 16:42:42 +0000
Subject: Speed of Python
Message-ID: <BAY122-F26364D8EC97387DA6FC814B4C50@phx.gbl>

Hi, 

While comparing the speed of octave and matlab, I decided to do a similar 
test for python and matlab. The result shows that python is slower than 
matlab by a factor of 5. It is not bad since octave is about 30 time slower 
than matlab.

Here is the result in matlab:
Elapsed time is 0.015389 seconds.

and in Python:
>>> t=timeit.Timer("bench1.bench1(10)","import bench1")
>>> t.repeat(1,1)
[0.071012377266015392]

Here is the bench1.py:
import math
def bench1(n):
	for i in range(n):
		for j in range(1000):
			m=j+1
			z=math.log(m)
			z1=math.log(m+1)
			z2=math.log(m+2)
			z3=math.log(m+3)
			z4=math.log(m+4)
			z5=math.log(m+5)
			z6=math.log(m+6)
			z7=math.log(m+7)
			z8=math.log(m+8)
			z9=math.log(m+9)
	return z9		

Is my conclusion correct that Python is slower than matlab? Are there any 
way to speed it up? It seems Python automatically created bench1.pyc. Does 
Python automatically execute the bench1.pyc to speed it up?


Thanks

Frank

_________________________________________________________________
???????? ????????????????????????? 
http://chizumaga.jp/ 



From __peter__ at web.de  Mon Sep 24 12:24:22 2007
From: __peter__ at web.de (Peter Otten)
Date: Mon, 24 Sep 2007 18:24:22 +0200
Subject: Converting numbers to unicode charaters
References: <1190641342.127770.115610@y42g2000hsy.googlegroups.com>
	<fd8h60$6p5$1@news2.u-psud.fr> <Xns99B5A0000722Dduncanbooth@127.0.0.1>
Message-ID: <fd8obl$iko$03$1@news.t-online.com>

Duncan Booth wrote:

> Laurent Pointal <laurent.pointal at limsi.fr> wrote:
> 
>> You may eventually use a more condensed expression and avoid n 
>> concatenation of n chars using join, like this:
>> 
>> >>> u''.join(unichr(int(x,16)) for x in ['42','72','61','64'])
>> u'Brad'
> 
> Or even avoid the loop completely:
> 
>>>> hexs = ['42', '72', '61', '64']
>>>> u'\\x'.join(['']+hexs).decode('string-escape')
> 'Brad'
> 
> (but for that to work you really do need to be sure that all the values are 
> 2 characters).

Or

>>> "".join(['42', '72', '61', '74']).decode("hex").decode("latin1")
u'Brat'

(same caveat)

Peter


From bdesth.quelquechose at free.quelquepart.fr  Wed Sep 19 15:52:06 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 19 Sep 2007 21:52:06 +0200
Subject: Using pseudonyms (was Re: Python 3K or Python 2.9?)
In-Reply-To: <fcreo3$iug$1@panix3.panix.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<mailman.726.1190130940.2658.python-list@python.org>
	<fcot65$1us$1@panix3.panix.com>
	<46effd63$0$16044$426a74cc@news.free.fr>
	<fcreo3$iug$1@panix3.panix.com>
Message-ID: <46f17e0d$0$31727$426a34cc@news.free.fr>

Aahz a ?crit :
> In article <46effd63$0$16044$426a74cc at news.free.fr>,
> Bruno Desthuilliers  <bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote:
> 
(snip)
>>>>>(For those joining only recently, my full legal name is "Aahz", which I
>>>>>changed from my former name precisely because of attitudes like Bruno's.)
>>
>>For the record, I usually don't give a damn about what
>>name/nickname/whatever peoples use.
> 
> 
> Then why mention pseudonyms at all?

My fault - I'm sometimes a bit overreactive, and Mr TheFlyingDutchman, 
(aka zzbbaadd) was starting to get on my nerves. I know I shouldn't have 
post this one, and I apologize.


From gagsl-py2 at yahoo.com.ar  Thu Sep 13 01:51:04 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 13 Sep 2007 02:51:04 -0300
Subject: Python code-writing for the blind. Was (Re: newbie: stani's
	pythoneditor if-else)
References: <1189531123.283413.160870@22g2000hsm.googlegroups.com>
	<588D53831C701746A2DF46E365C018CE01D2CB3F@LITEXETSP001.etrsouth.corp.entergy.com>
Message-ID: <op.tykvver5x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 11 Sep 2007 14:28:35 -0300, Hamilton, William   
<whamil1 at entergy.com> escribi?:

> Can you set SPE to use a single space rather than the typical four
> spaces?  Python should accept it just fine.  You'll still have problems
> reading other people's code.  Maybe you can write a quick script that
> converts code down to one-space indents.

The existing demo script reindent.py (in tools/Scripts) does exactly that,  
but using 4 spaces. Just replace the number 4 in its source code by a  
variable name (it occurs only twice) and it's done.

-- 
Gabriel Genellina



From pavlovevidence at gmail.com  Fri Sep 21 19:52:41 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 21 Sep 2007 19:52:41 -0400
Subject: Would Anonymous Functions Help in Learning Programming/Python?
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
Message-ID: <46f45f02$0$15350$4c368faf@roadrunner.com>

On Fri, 21 Sep 2007 21:37:18 +0000, Cristian wrote:
> Although his learning experience has gone mostly smoothly, he's hit a
> lot of speed bumps with functions. Specifically, he's having trouble
> thinking of functions as first order data (don't worry, I haven't
> confused him with such terminology yet). He had a little trouble
> understanding that you can pass functions as arguments to other
> functions (e.g., passing a key to the list.sort method). He also had a
> little trouble grasping functions within other functions. Last but not
> least, he had trouble grasping methods in class declarations, especially
> the required self as the first argument (I'm sure he wasn't the first).

First of all, let me say that I think "functions as first class data" is 
helpful, but not crucial, to programming in Python, and there are many 
people who simply don't need the lesson.  Especially someone like an 
engineer (in the classical sense), who isn't building versatile software 
packages, won't need to resort to functional programming much.  For 
straightforward tasks, like sorting lists with a custom ordering, 
functional progamming merely a convenience, and can be done without.

So I'm -1 on syntactic changes to the language to support a pedagogical 
use that's not crucially important.


Now, as for the more general question--How do you teach functional 
concepts?--because some people do need to know it.  I suspect it's one of 
those things where there are two possibilities and not much in between.  
Either

1. The person gets it right away.

or

2. The person doesn't get it right away.

In the latter case, trying to teach it conceptually is probably 
hopeless.  Best thing to do is teach functional usage for certain use 
cases.  For instance, teach someone to define a function returning a key, 
and have them use "key=myfunc" in list.sort--and not worry about why it 
works.  If they keep at it, eventually one of two things will happen.  
Either,

2a. The person will have an "A ha! I get it now!" moment, and will 
finally understand the concept.

or

2b. The person will never get it.


Carl Banks


From gandalf at designaproduct.biz  Thu Sep 13 05:55:26 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Thu, 13 Sep 2007 11:55:26 +0200
Subject: I want py2exe not to create library.zip
In-Reply-To: <13egu7rmilu2ia4@corp.supernews.com>
References: <mailman.452.1189627963.2658.python-list@python.org>
	<13egu7rmilu2ia4@corp.supernews.com>
Message-ID: <46E9090E.2080108@designaproduct.biz>


>> I want py2exe not to create library.zip.
>>     
>
> setup (
>        [...]
>        options = {"py2exe": {"skip_archive":1}}
>       )       
>   
Cool! Just what I needed. Where it is documented? Ah, in the source. :-)


From simon.hibbs at gmail.com  Wed Sep 19 15:46:22 2007
From: simon.hibbs at gmail.com (Simon Hibbs)
Date: Wed, 19 Sep 2007 12:46:22 -0700
Subject: Using python to create windows apps that everyone can use?
In-Reply-To: <mailman.736.1190143365.2658.python-list@python.org>
References: <7C008A37566.00000D2Atomharding@inbox.com>
	<mailman.736.1190143365.2658.python-list@python.org>
Message-ID: <1190231182.174676.306980@r29g2000hsg.googlegroups.com>

 On 9/18/07, Thomas Harding <tomhard... at inbox.com> wrote:

 > Hi guys, sorry to post another topic on this, as I am aware that it
has
 > already been posted a few times, but not with specifically what I
am looking
 > for. I want an app that makes a gui interface for python (similar
to
 > Microsoft visual studio or qt designer, not a code based one) and/
or an app
 > that can make this into a .exe that can be opened by any person on
any
 > computer without python installed.

For windows only, there's always Iron Python. This allows you to use
Visual Studio, the commercial or the express version, to create the
GUI in VB or C# and from that call Python code that does all the heavy
lifting.

I'd second the recommendation for QtDesigner if you want cross-
platform capability.

Simon Hibbs



From gregpinero at gmail.com  Wed Sep 12 14:31:56 2007
From: gregpinero at gmail.com (gregpinero at gmail.com)
Date: Wed, 12 Sep 2007 18:31:56 -0000
Subject: Get Only the Last Items in a Traceback
In-Reply-To: <fc910p$fmj$01$2@news.t-online.com>
References: <1189562968.529414.27910@w3g2000hsg.googlegroups.com>
	<fc8aqq$3us$02$1@news.t-online.com>
	<1189609742.781671.143320@g4g2000hsf.googlegroups.com>
	<fc910p$fmj$01$2@news.t-online.com>
Message-ID: <1189621916.517654.200410@g4g2000hsf.googlegroups.com>

On Sep 12, 11:35 am, Peter Otten <__pete... at web.de> wrote:
> Am Wed, 12 Sep 2007 15:09:02 +0000 schrieb gregpin... at gmail.com:
>
>
>
> > On Sep 12, 5:17 am, Peter Otten <__pete... at web.de> wrote:
>
> >> Your assessment is wrong. You only get the extra lines in the traceback if
> >> you don't immediately wrap the exec statement in a try ... except block:
> >> $ cat snip_traceback3.py
> >> import sys
> >> import traceback
>
> >> def alpha():
> >>     beta()
>
> >> def beta():
> >>     gamma()
>
> >> def gamma():
> >>     try:
> >>         exec s in {}
> >>     except Exception, e:
> >>         etype, value, tb = sys.exc_info()
> >>         traceback.print_exception(etype, value, tb.tb_next)
>
> >> s = """
> >> def delta():
> >>     epsilon()
>
> >> def epsilon():
> >>     1/0
> >> delta()
> >> """
>
> >> if __name__ == "__main__":
> >>     alpha()
>
> >> $ python snip_traceback3.py
> >> Traceback (most recent call last):
> >>   File "<string>", line 7, in <module>
> >>   File "<string>", line 3, in delta
> >>   File "<string>", line 6, in epsilon
> >> ZeroDivisionError: integer division or modulo by zero
>
> >> Heureka.
> > Thanks for the help, Peter.  That's exactly what I need.
>
> Indeed. But not exactly what you want, it seems.
>
> > Now could I
> > use your tb.tb_next trick a couple times and thus avoid moving the try/
> > except?
>
> Of course you can cut off the traceback at arbitrary positions. Here's an
> example that uses the filename:
>
> import traceback
> import sys
>
> def tb_filename(tb):
>     return tb.tb_frame.f_code.co_filename
>
> def tb_iter(tb):
>     while tb is not None:
>         yield tb
>         tb = tb.tb_next
>
> def alpha():
>     try:
>         beta()
>     except Exception, e:
>         etype, value, tb = sys.exc_info()
>         filename = tb_filename(tb)
>         for tb in tb_iter(tb):
>             if tb_filename(tb) != filename:
>                 break
>         traceback.print_exception(etype, value, tb)
>
> def beta():
>     gamma()
>
> def gamma():
>     exec s in {}
>
> s = """
> def delta():
>     epsilon()
>
> def epsilon():
>     1/0
> delta()
> """
>
> if __name__ == "__main__":
>     alpha()
>
> Did I mention it already? It's better to move the try ... except.
>
> Peter


This approach is ideal.  Indirect, but ideal :-)  I'll apply it
tonight.

It's complicated but suffice it to say it would be difficult to move
the try/except.  Thanks for the help.  Way to know about tracebacks,
very impressive!

-Greg



From jjl at pobox.com  Wed Sep 19 15:39:36 2007
From: jjl at pobox.com (John J. Lee)
Date: Wed, 19 Sep 2007 19:39:36 GMT
Subject: Odd files; just left behind?
References: <mailman.760.1190205969.2658.python-list@python.org>
Message-ID: <878x725ts7.fsf@pobox.com>

Robin Becker <robin at reportlab.com> writes:

> I see a folder .python-eggs in my home directory on one of our servers
> with various .so files
>
> ~/.python-eggs/MySQL_python-1.2.2-py2.3-freebsd-6.1-SECURITY-i386.egg-tmp/_mysql.so
>
> are these just left behind from some install process?

Ah, it's about the resource extraction feature of setuptools.  It's
possible for zipped eggs to contain resources that have to be
extracted to the filesystem.  It puts them in the directory you saw
(or somewhere else -- see the docstring in my other reply).

http://peak.telecommunity.com/DevCenter/PkgResources#resource-extraction
http://peak.telecommunity.com/DevCenter/setuptools#automatic-resource-extraction



John


From jgardner.jonathangardner.net at gmail.com  Tue Sep 11 16:41:40 2007
From: jgardner.jonathangardner.net at gmail.com (Jonathan Gardner)
Date: Tue, 11 Sep 2007 20:41:40 -0000
Subject: Python Database Apps
In-Reply-To: <1189543168.276429.290180@e34g2000pro.googlegroups.com>
References: <1189479130.905136.196820@r34g2000hsd.googlegroups.com>
	<mailman.403.1189541226.2658.python-list@python.org>
	<1189543168.276429.290180@e34g2000pro.googlegroups.com>
Message-ID: <1189543300.428589.150280@t8g2000prg.googlegroups.com>

On Sep 11, 1:39 pm, Jonathan Gardner
<jgardner.jonathangardner.... at gmail.com> wrote:
>
> For client-side apps, managing a PostgreSQL installation might be
> asking too much. But for a web site or web service, I absolutely
> recommend it.

I should mention that I wrote a medical billing software app (client
side--PyQt) in Python with a PostgreSQL backend and there were no
problems (aside from managing the database--which was easy.) That was
over 4 years ago though.



From fredrik at pythonware.com  Wed Sep 26 07:27:02 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 26 Sep 2007 13:27:02 +0200
Subject: Documentation about pyexpat
In-Reply-To: <7.0.1.0.1.20070926124001.01c055b8@medienkonzepte.de>
References: <7.0.1.0.1.20070926124001.01c055b8@medienkonzepte.de>
Message-ID: <fddfm6$3pv$1@sea.gmane.org>

Horst J?ger wrote:

> is there any documentation about the pyexpat lib?

observation 1:

http://docs.python.org/lib/module-xml.parsers.expat.html

"This module uses the pyexpat module to provide access to the Expat 
parser. Direct use of the pyexpat module is deprecated."

observation 2:

$ more xml/parsers/expat.py

"""Interface to the Expat non-validating XML parser."""
__version__ = '$Revision: 17640 $'

from pyexpat import *

</F>



From sbassi at clubdelarazon.org  Sun Sep 16 17:25:41 2007
From: sbassi at clubdelarazon.org (Sebastian Bassi)
Date: Sun, 16 Sep 2007 18:25:41 -0300
Subject: Saving parameters between Python applications?
In-Reply-To: <1189969538.830532.98840@g4g2000hsf.googlegroups.com>
References: <1189969538.830532.98840@g4g2000hsf.googlegroups.com>
Message-ID: <9e2f512b0709161425p56089b8bg148a95bccfca6781@mail.gmail.com>

On 9/16/07, Stodge <stodge at gmail.com> wrote:
> python app1.py --location=c:\test1
> What I want to do is save the location parameter, so I can then do (in
> the same window):
> python app2.py
> And have app2.py automatically have access to the value of "location".

Do app1.py to save a pickle of the value you want app2 to read.

-- 
Sebasti?n Bassi (???????). Diplomado en Ciencia y Tecnolog?a.
Curso Biologia molecular para programadores: http://tinyurl.com/2vv8w6
GPG Fingerprint: 9470 0980 620D ABFC BE63 A4A4 A3DE C97D 8422 D43D

From sjmachin at lexicon.net  Mon Sep  3 20:10:53 2007
From: sjmachin at lexicon.net (John Machin)
Date: Mon, 03 Sep 2007 17:10:53 -0700
Subject: trap setting attribute when the attribute is dict
In-Reply-To: <fbhodb$5uv$1@geraldo.cc.utexas.edu>
References: <fbhi38$3rg$1@geraldo.cc.utexas.edu>
	<1188845236.417709.307160@50g2000hsm.googlegroups.com>
	<fbhodb$5uv$1@geraldo.cc.utexas.edu>
Message-ID: <1188864653.854065.80100@g4g2000hsf.googlegroups.com>

On Sep 4, 5:47 am, <yos... at ccwf.cc.utexas.edu> wrote:
> Arnaud Delobelle <arno... at googlemail.com> wrote:
> > On Sep 3, 7:00 pm, <yos... at ccwf.cc.utexas.edu> wrote:
>
> >> I want to do something like this.  My class/instance has a dict as a
> >> property.  I want the instance to catch the change in the dict (change
> >> in some values, addition/deletion of key/value etc) to be recognized by
> >> the class instance.
>
> >> How can I do this?  Any suggestions are very well appreciated.
>
> >> Here is an example of what I want my class to behave:
>
> >> class test(object):
> >>         def __init__(self):
> >>                 self._d = {}
> >>                 self._changed = False
> >>         def getd(self):
> >>                 print 'called getd'
> >>                 return self._d
> >>         # dont know what to do next
> >>         def setd(self,val):
> >>                 print 'called setd', key, val
> >>                 self._d[key] = val
> > Where does the 'key' come from?  Perhaps you need to look further into
> > how properties work.
>
> This obviously doesn't work...
>
>
>
> >>                 self._changed = True
> >>         d = property(getd,setd,None,None)
>
> >>         def getc(self):
> >>                 return self._changed
> >>         changed = property(getc,None,None,None)
>
> >> if __name__ == '__main__':
> >>         obj = test()
> >>         print 'obj.changed = ', obj.changed
> >>         print
>
> >>         # I want obj to know that its propety d being changed here
> >>         print "t.d['a'] = 1"
> >>         obj.d['a'] = 1
> >>         print
>
> >>         # I want the "changed" property to be True
> >>         print 'obj.changed = ', obj.changed
>
> > You can't do that with plain dicts, and I'm not sure it is often a
> > good idea.  However you could create a class that behaves like a dict
> > but calls a function each time an item is set, e.g. (made up
> > terminology):
> >>>> class TriggerDict(object):
> > ...     def __init__(self, trigger, val=None):
> > ...             self.trigger = trigger
> > ...             self.dict_ = val or {}
> > ...     def __setitem__(self, key, val):
> > ...             self.trigger(self, key, val)
> > ...             self.dict_[key] = val
> > ...     def __getitem__(self, key):
> > ...             return self.dict_[key]
> > ...
> >>>> def trigger(d, k, v):
> > ...     print '%s => %s' % (k, v)
> > ...
> >>>> td = TriggerDict(trigger)
> >>>> td['spanish'] = 'inquisition' # see side effect below.
> > spanish => inquisition
> >>>> td['spanish']
> > 'inquisition'
>
> > Obviously your trigger function would set the _changed attribute of
> > the test object instead.  And again it is probably not a good idea
> > unless you know exactly what you are doing.  If it was me, I'd try to
> > rethink my design instead.
>
> Thank you for suggestion, Arnaud.
>
> Since you are discouraging this idea of trigger, may I ask an advice of
> if my intention was legitimate one or not?
>
> My intention was to have a propery 'sum' in my object, and which has sum
> of all the values() of the dict (i have code to make sure that the value
> of dict are all numeric).  I could just the propery being calculated
> everytime the property got __getattr__.  But I thought that it was
> inefficient to calculate the same number over and over when the value is
> already known.  So I was thiking of calculating the number only when the
> dict got modified.
>
> I also experimented with the idea of subclassing dict itself to
> calculate the sum.  Is this what would be better solution?
>

And what's wrong with calculating the value when you need it ...

def thedictsum(self):
    return sum(self.thedict.itervalues())

How big will the dict be, how often will it be updated, how often will
the sum be required?

Have you done timings of any of the options?

You say you have code to check that the values are numeric; why not
put this together with maintenance of the sum into a method which
clients must use to update the dict?

BTW, my motto:

"__" == "Danger, Will Robinson!" == "Wrong way, go back" :-)

HTH,
John



From jcd at sdf.lonestar.org  Fri Sep 21 19:27:30 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Fri, 21 Sep 2007 19:27:30 -0400
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <1190415741.380795.259050@y42g2000hsy.googlegroups.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>	<mailman.900.1190414696.2658.python-list@python.org>
	<1190415741.380795.259050@y42g2000hsy.googlegroups.com>
Message-ID: <46F45362.7090604@sdf.lonestar.org>

Cristian wrote:
> On Sep 21, 3:44 pm, Ron Adam <r... at ronadam.com> wrote:
>
>   
>> I think key may be to discuss names and name binding with your friend.  How
>> a name is not the object it self, like a variable is in other languages.
>> For example show him how an object can have more than one name.  And discus
>> how names can be bound to nearly anything, including classes and functions.
>>     
>
> I could discuss name binding but it would be great if Python said this
> itself. After all, you can even bind a module with the foo = bar
> syntax by using __import__ function. If function definitions followed
> the same pattern, I think a beginner would subconsciously (maybe even
> consciously) realize that function names are just like everything
> else. Actually, this would be helpful for many people. If you come
> from a language like Java you're used to thinking of attributes and
> methods as living in different namespaces. I think a new syntax will
> encourage seasoned programmers think in a more Pythonic way.
>   

However, you still have to solve the problem of using a single-line
construct (x = y) with a multi-line definition.  That is the essential
difference that def is designed to solve.  The __import__ trick works
because import is also a single line construct. 

The only proposal given in this thread is using consistent indentation
within the parentheses, but parentheses are already explicitly designed
to let you ignore the whitespace rules.  To suddenly create a situation
in which you have significant whitespace on the right side of an
assignment statement, and *within parentheses* will break too much code,
and make the solution unnecessarily ugly.  Multi-line lambdas have been
rejected because of this very problem, so unless you have a clean
solution, I think your proposal falls into the category of "would be
nice, but not in Python."

Cheers,
Cliff


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Sep  3 05:17:19 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 03 Sep 2007 11:17:19 +0200
Subject: TypeError: 'module object is not callable'
In-Reply-To: <mailman.315.1188810174.28954.python-list@python.org>
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<mailman.315.1188810174.28954.python-list@python.org>
Message-ID: <46dbd11e$0$6228$426a74cc@news.free.fr>

Amit Khemka a ?crit :
(snip)
> The exception is being raised as you are being confused about the
> names ie: you have a class named "Step" in a module named "Step.py" .

<nitpicking>
Actually, the module is named 'Step', not 'Setp.py' !-)
</nitpicking>



From shankarjee at gmail.com  Wed Sep 19 13:10:32 2007
From: shankarjee at gmail.com (Shankarjee Krishnamoorthi)
Date: Wed, 19 Sep 2007 12:10:32 -0500
Subject: Embedding a executable inside Python Script
In-Reply-To: <13f2la0dq3gm0bf@corp.supernews.com>
References: <mailman.772.1190220593.2658.python-list@python.org>
	<13f2la0dq3gm0bf@corp.supernews.com>
Message-ID: <ead600e10709191010s15ec8030mdff0708f402d4082@mail.gmail.com>

I missed the obvious fact there. Thanks. I added it to the PATH and
that fixed everything.

Shankarjee

On 9/19/07, Grant Edwards <grante at visi.com> wrote:
> On 2007-09-19, Shankarjee Krishnamoorthi <shankarjee at gmail.com> wrote:
>
> > I have a exe made with py2exe for my Python routine. The issue
> > I am running into is this. All the exes (mycode.exe and
> > other_executable.exe) are placed in a Network drive(Say I:) so
> > that people can access it.
> >
> > When the user calls this from a Local Drice(Say C:) The output is like this
> > C:> I:\mycode.exe input_file other_executable_file.exe is not found.....
>
> The problem is that 'other_executable.exe' isn't in a directory
> that's on the current PATH.
>
> > Is there any way where I can circumvent this. Thanks
>
> Either set the PATH environment variable to include the
> directory where other_executable.exe is located or specify the
> complete path to other_executable.exe in your os.system() call.
>
> --
> Grant Edwards                   grante             Yow! I hope the
>                                  at               ``Eurythmics'' practice
>                               visi.com            birth control ...
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From gagsl-py2 at yahoo.com.ar  Sun Sep 30 20:37:06 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 30 Sep 2007 21:37:06 -0300
Subject: Command-line does work when scheduled
References: <1191098074.342460.52130@n39g2000hsh.googlegroups.com>
	<mailman.1289.1191100817.2658.python-list@python.org>
	<1191104269.578536.56470@g4g2000hsf.googlegroups.com>
	<mailman.1291.1191113688.2658.python-list@python.org>
	<1191114246.668635.327080@o80g2000hse.googlegroups.com>
	<mailman.1293.1191120273.2658.python-list@python.org>
	<1191163376.067339.34740@d55g2000hsg.googlegroups.com>
Message-ID: <op.tzhtb4atx6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 30 Sep 2007 11:42:56 -0300, Jim <jscrerar at compuserve.com> escribi?:

> On Sep 29, 8:45 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:

>> The %* at the end is important: if you created the association by using
>> "Open with...", or selecting Python from the list of installed programs,
>> very likely the command says only "%1" - that is, the script being open,
>> but without any additional arguments.

> I believe I get the correct results as follows:
> ==============================================
> Microsoft Windows XP [Version 5.1.2600]
> (C) Copyright 1985-2001 Microsoft Corp.
>
> J:\Jim Crerar\mypython\misc>assoc .py
> .py=Python.File
>
> J:\Jim Crerar\mypython\misc>ftype Python.File
> Python.File="E:\Python25\python.exe" "%1" %*
>
> J:\Jim Crerar\mypython\misc>
> ===============================================
> What else could be wrong?

No more ideas... I think the scheduler just executes the command line, and  
if it works in a console, should work in the scheduler too... Unless you  
execute the job under another user, who has a different association for  
.py files, that's the only reason I can think of.

-- 
Gabriel Genellina



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Sep 24 05:45:43 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 24 Sep 2007 11:45:43 +0200
Subject: about __str__
In-Reply-To: <mailman.971.1190623259.2658.python-list@python.org>
References: <mailman.835.1190325729.2658.python-list@python.org>	<46f37540$0$16854$426a74cc@news.free.fr>
	<mailman.971.1190623259.2658.python-list@python.org>
Message-ID: <46f78734$0$8901$426a74cc@news.free.fr>

Mikael Olofsson a ?crit :
> Bruno Desthuilliers wrote:
>> def __str__(self):
>>     return "<%s:%s>" % (self.commiterID_, self.commits_)
> 
> I would write that in the following way:
> 
> def __str__(self):
>    return "<%(commiterID_)s:%(commits_)s>" % self.__dict__
> 
> More explicit IMHO. And easier to maintain, especially if the string 
> would contain several insertions.

Agreed. Well, at least until you want to access something that's not in 
the instance's __dict__ !-)



From xcarma at gmail.com  Sat Sep 15 10:15:06 2007
From: xcarma at gmail.com (xcarma at gmail.com)
Date: Sat, 15 Sep 2007 14:15:06 -0000
Subject: DDE error Poke Failed
Message-ID: <1189865706.655384.272470@y42g2000hsy.googlegroups.com>

Hi

First of all I am a beginner with python and I am a bit fooling around
to check wich possibilities I have.  I'm trying to get some data to an
internal developped application.

Server: DDE
Topic: SCSDDeServer
Item: SendCustomerData
Item data: value, value, value

I got the following code

import win32ui, dde
server = dde.CreateServer()
server.Create("test")
conversation = dde.CreateConversation(server)
conversation.ConnectTo("SCS","SCSDDeServer")
conversation.Poke('"SendCustomerData", "S1234567,,"')

When I run this I get

Traceback (most recent call last):
  File "U:\python\scs.py", line 6, in <module>
    conversation.Poke('"SendCustomerData", "S1234567"')
error: Poke failed

Am I doing anything wrong? Or is it possible that the SCS application
only accepts pokes from a specific program?

Regards

Maarten



From apardon at forel.vub.ac.be  Thu Sep 13 03:06:45 2007
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 13 Sep 2007 07:06:45 GMT
Subject: An ordered dictionary for the Python library?
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<13efnmi4n959a59@corp.supernews.com>
	<1189601205.503841.327170@o80g2000hse.googlegroups.com>
	<1189605250.186948.303130@50g2000hsm.googlegroups.com>
Message-ID: <slrnfehoc5.hm9.apardon@rcpc42.vub.ac.be>

On 2007-09-12, Mark Summerfield <m.n.summerfield at googlemail.com> wrote:
> On 12 Sep, 13:46, Michele Simionato <michele.simion... at gmail.com>
> wrote:
>> On Sep 12, 2:42 pm, Steven D'Aprano <st... at REMOVE-THIS-
>>
>> cybersource.com.au> wrote:
>> > On Wed, 12 Sep 2007 07:33:45 +0000, Mark Summerfield wrote:
>> > In fact, I'm not sure what people mean by ordered dicts. I assume they
>> > mean the keys are ordered, not the values. But ordered by what? Insertion
>> > order? Modification order? Alphabetical order?
>>
>> Insertion order.
>>
>>  M.S.
>
>
> Actually I meant by key order, so insertion order doesn't matter at
> all. If you need a dictionary-like data structure that respects
> insertion order you could use a list of (key, value) tuples.

If you want a dictionary that iterates over his keys and does so
in a sorted manner you probably want a tree.

One posible implemenation can be found here:

  http://www.pardon-sleeuwaegen.be/antoon/avltree.html


I hope it is usefull to you.

-- 
Antoon Pardon


From f.guerrieri at gmail.com  Sun Sep 30 11:48:25 2007
From: f.guerrieri at gmail.com (Francesco Guerrieri)
Date: Sun, 30 Sep 2007 17:48:25 +0200
Subject: s.split() on multiple separators
In-Reply-To: <1191160394.870241.171200@w3g2000hsg.googlegroups.com>
References: <1191160394.870241.171200@w3g2000hsg.googlegroups.com>
Message-ID: <79b79e730709300848u58ddd797nfb434d2f5de7c862@mail.gmail.com>

On 9/30/07, mrkafk at gmail.com <mrkafk at gmail.com> wrote:
> Hello everyone,
>
> OK, so I want to split a string c into words using several different
> separators from a list (dels).

Have a look at this recipe:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/303342

which contains several ways to solve the problem. You could both
translate all your separators to a single one, and then split over it,
or (maybe the simpler solution) going for the list comprehension
solution.

francesco


From steven.bethard at gmail.com  Fri Sep 28 19:42:49 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 28 Sep 2007 17:42:49 -0600
Subject: Can I overload the compare (cmp()) function for a Lists ([])
	index function?
In-Reply-To: <1191002767.350147.153910@57g2000hsv.googlegroups.com>
References: <1191000652.430036.288400@y42g2000hsy.googlegroups.com>
	<1191002767.350147.153910@57g2000hsv.googlegroups.com>
Message-ID: <fMmdncwvE7_nDGDbnZ2dnUVZ_qmlnZ2d@comcast.com>

irstas at gmail.com wrote:
> On Sep 28, 8:30 pm, xkenneth <xkenn... at gmail.com> wrote:
>> Looking to do something similair. I'm working with alot of timestamps
>> and if they're within a couple seconds I need them to be indexed and
>> removed from a list.
>> Is there any possible way to index with a custom cmp() function?
>>
>> I assume it would be something like...
>>
>> list.index(something,mycmp)
>>
>> Thanks!
> 
> Wouldn't it be enough to get the items that are "within a couple of
> seconds" out of the list and into another list. Then you can process
> the other list however you want. Like this:
> 
>  def isNew(x):
>      return x < 5
> 
>  data = range(20)
>  print data
>  out, data = filter(isNew, data), filter(lambda x: not isNew(x), data)
>  print out, data

Slightly off topic here, but these uses of filter will be slower than 
the list comprehension equivalents::

     out = [x for x in data if x < 5]
     data = [x for x in data if x >= 5]

Here are sample timings::

$ python -m timeit -s "data = range(20)" -s "def is_new(x): return x < 
5" "filter(is_new, data)"
100000 loops, best of 3: 5.05 usec per loop
$ python -m timeit -s "data = range(20)" "[x for x in data if x < 5]"
100000 loops, best of 3: 2.15 usec per loop

Functions like filter() and map() are really only more efficient when 
you have an existing C-coded function, like ``map(str, items)``. Of 
course, if the filter() code is clearer to you, feel free to use it, but 
I find that most folks find list comprehensions easier to read than 
map() and filter() code.

STeVe


From ratchetgrid at googlemail.com  Sun Sep 16 19:14:37 2007
From: ratchetgrid at googlemail.com (Nathan Harmston)
Date: Mon, 17 Sep 2007 00:14:37 +0100
Subject: adding a static class to another class
Message-ID: <676224240709161614i2c418bf0s550728e611ca79d1@mail.gmail.com>

HI,

I m trying to start an api in a similar way to the djangic way of
Class.objects.all(). Ie objects is a "Manager" class.

So:

class Foo(object):
   def __init__(self):
        self.test = "NEE"

class Manager(object):
    def __init__(self):
        pass
   def all(self):
       return "COCONUTS"

Because of how some of the code is set up I cant use
metaclasses........so I try to use a decorator:

def addto(instance):
    def decorator(f):
        import new
        f = new.instancemethod(f, instance, instance.__class__)
        setattr(instance, "objects", f)
        return f
    return decorator

class Manager(object):
    @addto(Foo)
    def __init__(self):
       .............

however this only binds the init method to the Foo.objects, so not
what I want. If I try using classmethod...then it just says the
Foo.objects doesnt exist.

Does anyone have any ideas how I can accomplish this using decorators?
And also preventing more than one Manager instance instantiated at one
time.

Many Thanks in advance,

Nathan


From bulliver at badcomputer.org  Fri Sep  7 13:58:35 2007
From: bulliver at badcomputer.org (darren kirby)
Date: Fri, 07 Sep 2007 11:58:35 -0600
Subject: passing command line arguments
In-Reply-To: <93066C069973ED448DC2BCEA9C44A7383BE32D@efmailx>
References: <93066C069973ED448DC2BCEA9C44A7383BE32D@efmailx>
Message-ID: <200709071158.35779.bulliver@badcomputer.org>

quoth the Brian McCann:
> Hi,
>
> when I run the script show_args2.py
>
> # ./show_args2.py 1 2 3
>
> I get the following error
>
> Traceback (most recent call last):
>   File "./show_args2.py", line 4, in ?
>     print 'The arguments of %s are "%s"' %s \
>     NameError: name 's' is not defined
>
>
> #####################################
> <mailto:brian.mccann at viziant.net>
> this is the script
>  #!/usr/bin/python
> import sys, string
> print 'The arguments of %s are "%s"' %s \
>         (sys.argv[0], string.join(sys.argv[1:]))

You don't want the 's' on the last format operator. Try:

 print 'The arguments of %s are "%s"' % \
         (sys.argv[0], string.join(sys.argv[1:]))

> any help would be greatly appreciated
>
> -Brian

-d
-- 
darren kirby :: Part of the problem since 1976 :: http://badcomputer.org
"...the number of UNIX installations has grown to 10, with more expected..."
- Dennis Ritchie and Ken Thompson, June 1972


From gagsl-py2 at yahoo.com.ar  Fri Sep 28 21:24:29 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 28 Sep 2007 22:24:29 -0300
Subject: Emailing the attachment created with the Quick Screenshots
	Script(Python + PIL)
References: <000001c801e8$1eb8ff20$eafca8c0@tfccorp.intra>
Message-ID: <op.tzd563s1x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Fri, 28 Sep 2007 12:56:18 -0300, Mark Bratcher  
<mbratcher at cclpcitrus.com> escribi?:

> The quick screenshots script works great for the project I'm working on  
> and
> I'm trying to modify it to include emailing the JPG file it generates.  I
> retrieved both scripts from the Python Archives.  The modified script is
> pasted below and the errors below that.  My goal is to have the latest  
> date
> stamped file emailed to me.

> editorstring='"start"%s" "%s"'% (ImageEditorPath,saveas) #Just for  
> Windows
> right now?

Do you really want to open the image with MSPaint? If not, remove the  
above line and the os.system call
(it's wrong, anyway...)

> # me == the sender's email address
>
> # family = the list of all recipients' email addresses
>
> msg['From'] = ("Mark Bratcher")
>
> msg['To'] = COMMASPACE.join("Mark Bratcher")

Ouch... Try printing msg['To'] (before correcting anything) and see what  
happens :)

msg['From'] = "your at email.address"
msg['To'] = "the.destination at email.address"

They might be the same address. That COMMASPACE.join was to account for  
multiple recipients - just ignore it for now.

> for file in "c:\downloads\python\Attachments\*.jpg":

a) This `for` iterates over all the LETTERS on c:\downloads...
b) The path should be written r"c:\downloads..." as seen on the first  
lines on your script
c) Don't you want a SINGLE jpg? Why iterate over all ones? You already  
know the filename, it's the `saveas` variable above.

Replace the whole for loop with:

# Open the files in binary mode.  Let the MIMEImage class automatically
fp = open(saveas, 'rb')
img = MIMEImage(fp.read())
fp.close()
msg.attach(img)

> # Send the email via our own SMTP server.
> s = smtplib.SMTP()

Above, you may need to provide details about your SMTP, like  
SMTP("mail.cclpcitrus.com")

> s.connect()
> s.sendmail(me, family, msg.as_string())
> s.close()

me? family?
Try with:
s.sendmail(msg['From'], msg['To'], msg.as_string())

Good luck!

-- 
Gabriel Genellina



From jstroud at mbi.ucla.edu  Wed Sep  5 16:37:37 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 05 Sep 2007 13:37:37 -0700
Subject: concise code (beginner)
In-Reply-To: <1189020188.842700.50950@d55g2000hsg.googlegroups.com>
References: <13dsvqrqivtf092@corp.supernews.com>
	<fbmrsg$dsi$1@daisy.noc.ucla.edu>
	<1189020188.842700.50950@d55g2000hsg.googlegroups.com>
Message-ID: <fbn42h$k37$1@daisy.noc.ucla.edu>

Karthik Gurusamy wrote:
> On Sep 5, 11:17 am, James Stroud <jstr... at mbi.ucla.edu> wrote:
>> 
>> for i in xrange(number_of_reads):
>>    for dev in devs:
>>      try:
>>        _reader = getattr(dev, 'read%d' % i)
>>        _reader()
>>      except Exception, e:
>>        print e
>>        devs.remove(dev)
> 
> I see in many of the solutions suggested above, the devs sequence/
> iterator is being modified while iterating. I know it is not defined
> for interation over dictionary keys. Are they defined for other
> collections like lists?

Good eye! My code is broke as you have noticed:

py> r = range(5)
py> for i in r:
...   print i
...   if i % 2:
...     r.remove(i)
...
0
1
3


For longer sequences, the algorithm I've used in these cases in the past 
goes something like this:

py> r = range(10, 17)
py> print r
[10, 11, 12, 13, 14, 15, 16]
py>
py> i = 0
py> while i < len(r):
...   j = r[i]
...   print j
...   if j % 2:
...     r.remove(j)
...   else:
...     i += 1
...
10
11
12
13
14
15
16
py> print r
[10, 12, 14, 16]


Which would change my problematic code above to:


for i in xrange(number_of_reads):
   j = 0
   while j < len(devs):
     try:
       _reader = getattr(devs[j], 'read%d' % i)
       _reader()
       j += 1
     except Exception, e:
       print e
       devs.remove(dev)

Another way is to make a copy of devs, if devs is short, which makes my 
problematic code into a matter of a "typo"--maybe I can make this claim 
to save some face?

for i in xrange(number_of_reads):
   for dev in devs[:]:
     try:
       _reader = getattr(dev, 'read%d' % i)
       _reader()
     except Exception, e:
       print e
       devs.remove(dev)

James

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

http://www.jamesstroud.com/


From steve at holdenweb.com  Tue Sep 11 08:08:07 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 11 Sep 2007 08:08:07 -0400
Subject: anybody has py modules emulating symbian 60 on PC?
In-Reply-To: <005f01c7f41d$cb9cfa80$4de1a8c0@amd.com>
References: <mailman.1141.1189478046.2656.python-list@python.org>
	<005f01c7f41d$cb9cfa80$4de1a8c0@amd.com>
Message-ID: <fc60f6$5qc$1@sea.gmane.org>

Ginger wrote:
> like appuifw/graphics/sysinfo modules,
> i've get some primary modules of these, they do what they did on S60 platform. u can get them from http://pdis.hiit.fi/pdis/
> but these modules i get are rather simple ones, and a full emulation is needed ..., so anyone who has it, plz send me a copy, with my appreciation.
> 
http://archive.devx.com/wireless/vendordocs/nokia.asp might help. Or it 
might not.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From __peter__ at web.de  Thu Sep 13 04:34:17 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 13 Sep 2007 10:34:17 +0200
Subject: cannot declare global vars!
References: <mailman.471.1189670049.2658.python-list@python.org>
Message-ID: <fcasm9$3gd$01$1@news.t-online.com>

Konstantinos Pachopoulos wrote:

> i had posted earlier for not being able to declare global vars. No i 

Post a followup in that thread then rather than starting a new one.

> followed the suggestions and created a class, but still the vars do not
> seem to have a global scope. I have tried pretty much everything. Any
> advice appreciated... Here:

[snip mess]

What Guillaume C. meant is:

To make a variable that is assigned within a function global you have to
declare it global

def foo():
    global x
    x = 42
foo()
print x

but that having many of these globals is a bad design and you should
use instance attributes instead:

class A(object):
    def foo(self):
        self.x = 42
a = A()
a.foo()
print a.x

Personally, I often prefer

def foo():
   return 42
x = foo()
print x

which is both explicit and concise.

These are basic considerations in Python, so I suggest that you read an
introductory text on the language before you proceed with your endeavours.

Peter


From steve at holdenweb.com  Thu Sep  6 07:50:15 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 06 Sep 2007 04:50:15 -0700
Subject: SQLite and coercing to Unicode - please help.
In-Reply-To: <46dfdd18$0$89254$7b0f0fd3@mistral.news.newnet.co.uk>
References: <46dfcbea$0$89178$7b0f0fd3@mistral.news.newnet.co.uk>	<mailman.143.1189076279.2658.python-list@python.org>
	<46dfdd18$0$89254$7b0f0fd3@mistral.news.newnet.co.uk>
Message-ID: <fbophp$1je$1@sea.gmane.org>

special_dragonfly wrote:
> That helped immensely Steve thank you. You're right, this is my first really 
> big project ever really, not just in Python.
> Just to clarify, my UPDATE statement instead of looking like this:
> 
> longstring="UPDATE SecB SET 
> currencyCode='"+Values[1]+"',issuerName='"+Values[2] 
> "',instrName='"+Values[3]+\
>                     "',instrShortName='"+Values[4]+"',instrType='"+Values[5]+"',secCode='"+Values[6]+\
>                     "',SEDOL='"+Values[7]+"',Date='"+Values[8]+"',SuspendedState='"+Values[9]+\
>                     "',bidPrice='"+Values[10]+"',offerPrice='"+Values[11]+"',midPrice='"+Values[12]+\
>                     "',standardMarketSize='"+Values[13]+"',openOrClosed='"+Values[14]+\
>                     "' WHERE secBoardId='"+Values[0]+"'"
> cursor.execute(longstring)
> 
> should instead look more like this:
> cursor.execute('UPDATE SecB SET 
> (?,?,?,?,?,?,?,?,?,?,?,?,?,?)',tuple(Values[1:])) ?
> 
Closer. It really needs to be more like

cursor.execute("""UPDATE SecB
    SET currencyCode=?, issuerName=?, instrName=?,
       ...
    openOrClosed=?
    WHERE secBoardId=?""", data)

In this case, since the secBoardID is used as the last parameter, data 
really needs to be se at

    data = tuple(Values[1:] + Values[:1])

But of course it would probably be easier to assemble Values in the 
right order in the first place. You will still need to turn it into a 
tuple, however, for cursor.execute().

> The Elements list was from a time when it looked less pretty than it does 
> now, where I iterated through it and didn't catch errors at all.
> 
> Thank you again for your help and when it's finished and working I'll repost 
> it online somewhere for ideas on how to optimise it slightly more!
> Dominic
> 
Good one!

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From jeff at jmcneil.net  Thu Sep 20 11:30:03 2007
From: jeff at jmcneil.net (Jeff McNeil)
Date: Thu, 20 Sep 2007 11:30:03 -0400
Subject: Python-list Digest, Vol 48, Issue 301
In-Reply-To: <200709201724.23611.cscheit@lstm.uni-erlangen.de>
References: <mailman.2897.1190299804.2656.python-list@python.org>
	<200709201724.23611.cscheit@lstm.uni-erlangen.de>
Message-ID: <82d28c40709200830o45b8079ey73227c07d97d6cd6@mail.gmail.com>

Zip do what you want?

Python 2.5 (r25:51918, Sep 19 2006, 08:49:13)
[GCC 4.0.1 (Apple Computer, Inc. build 5341)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> l1 = [1,2,3,4,5]
>>> l2 = ['a', 'b', 'c', 'd', 'e']
>>> for i,j in zip(l1, l2):
...     print i,j
...
1 a
2 b
3 c
4 d
5 e
>>>

You can also do the same thing using itertools.izip, but it will
return an iterator as opposed to building a new list.

-Jeff

On 9/20/07, Christoph Scheit <cscheit at lstm.uni-erlangen.de> wrote:
> Hello,
>
> is there a way to do something like
> for i,j in l1, l2:
>     print i,j
>
> ?
> Thanks in advance,
> Chris
>
> --
>
> ============================
> M.Sc. Christoph Scheit
> Institute of Fluid Mechanics
> FAU Erlangen-Nuremberg
> Cauerstrasse 4
> D-91058 Erlangen
> Phone: +49 9131 85 29508
> ============================
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From dion at richland.k12.la.us  Sun Sep 23 23:04:18 2007
From: dion at richland.k12.la.us (dion at richland.k12.la.us)
Date: Mon, 24 Sep 2007 04:04:18 +0100
Subject: here is the weekend report, please review it.
Message-ID: <46F72932.6080401@hotmail.com>

News Expected Monday From SREA

SCORE ONE INC (S R E A)
$0.1

Last time we saw news from SREA it rocketed. Don't let it get away, get
all over SREA first thing Mon.



From jcd at sdf.lonestar.org  Sun Sep 16 21:59:53 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Sun, 16 Sep 2007 21:59:53 -0400
Subject: Try this
In-Reply-To: <1189990689.259451.232570@g4g2000hsf.googlegroups.com>
References: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>	<13eqsdfsfvsa16f@corp.supernews.com>	<1189969529.652871.19280@50g2000hsm.googlegroups.com>	<mailman.621.1189970593.2658.python-list@python.org>	<1189979679.969074.216490@y42g2000hsy.googlegroups.com>	<1189981681.745195.18130@y42g2000hsy.googlegroups.com>	<1189983233.709832.124290@19g2000hsx.googlegroups.com>	<1189984913.956999.163100@n39g2000hsh.googlegroups.com>
	<1189990689.259451.232570@g4g2000hsf.googlegroups.com>
Message-ID: <46EDDF99.1090407@sdf.lonestar.org>

mensanator at aol.com wrote:
> The very presence of an algorithm to detect encoding is a bug.
> Files with they .txt extension should always be treated as ANSI
> even if they contain binary data. Notepad should never be
> allowed to try to decide what the encoding is if the the open
> dialog has the encoding set to ANSI.
>
>   

Mmmmm, yeah....  I'm going to have to go ahead and, uh, disagree with
you there.

If I open a text file in WordPad, and then do a save as, I get the
following choices, all specifying an extension of .txt

Text Document
Text Document - MS-DOS Format
Unicode Document

If Microsoft offers to create documents in three different formats with
the same extension, it damn well better make some effort to figure out
which one it's trying to open when it reopens those same documents.

Cheers,
Cliff




From jscrerar at compuserve.com  Sat Sep 29 21:04:06 2007
From: jscrerar at compuserve.com (Jim)
Date: Sat, 29 Sep 2007 18:04:06 -0700
Subject: Command-line does work when scheduled
In-Reply-To: <mailman.1291.1191113688.2658.python-list@python.org>
References: <1191098074.342460.52130@n39g2000hsh.googlegroups.com>
	<mailman.1289.1191100817.2658.python-list@python.org>
	<1191104269.578536.56470@g4g2000hsf.googlegroups.com>
	<mailman.1291.1191113688.2658.python-list@python.org>
Message-ID: <1191114246.668635.327080@o80g2000hse.googlegroups.com>

On Sep 29, 6:56 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Sat, 29 Sep 2007 19:17:49 -0300, Jim <jscre... at compuserve.com> escribi?:
>
>
>
>
>
> > On Sep 29, 3:19 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> > wrote:
> >> En Sat, 29 Sep 2007 17:34:34 -0300, Jim <jscre... at compuserve.com>  
> >> escribi?:
>
> >> > I want to schedule a Python program that reads the command line for
> >> > input.  However, when adding an argument to the command line Python
> >> > will not pick it up when using Windows scheduled tasks.
>
> >> > How do I get it to work?
>
> >> Do you write the command line when defining the task? Using double  
> >> quotes
> >> around arguments with spaces?
> >> It works fine for me.
>
> > I ran the following on the Scheduled Tasks:
> >    "J:\Jim Crerar\MyPython\Zero_OE_Counter\Zero_OE_Counter.py"  n
> >    "J:\Jim Crerar\MyPython\Zero_OE_Counter\Zero_OE_Counter.py  n"
> >    "J:\Jim Crerar\MyPython\Zero_OE_Counter\Zero_OE_Counter.py"  "n"
> > None of them work.
> > However, no problem with running from *.bat file or directly from
> > shortcut on my Desktop.
>
> Try prepending the Python executable:
>
> C:\Python25\Python.exe "J:\Jim  
> Crerar\MyPython\Zero_OE_Counter\Zero_OE_Counter.py" n
>
> If it works this way, maybe the .py file extension is not correctly  
> registered.
>
> --
> Gabriel Genellina- Hide quoted text -
>
> - Show quoted text -

Yes, it works this way.
How do I register the .py extension correctly?

Thanks,
Jim



From dickinsm at gmail.com  Sun Sep  2 13:42:23 2007
From: dickinsm at gmail.com (Mark Dickinson)
Date: Sun, 02 Sep 2007 17:42:23 -0000
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
In-Reply-To: <1i3t4ha.1r0xx7414w0taxN%aleax@mac.com>
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
	<1188735642.391419.103650@19g2000hsx.googlegroups.com>
	<1188740716.423349.304370@y42g2000hsy.googlegroups.com>
	<1188742231.470668.29910@g4g2000hsf.googlegroups.com>
	<1i3t4ha.1r0xx7414w0taxN%aleax@mac.com>
Message-ID: <1188754943.512850.158320@y42g2000hsy.googlegroups.com>

On Sep 2, 12:55 pm, al... at mac.com (Alex Martelli) wrote:
> Mark Dickinson <dicki... at gmail.com> wrote:
> > Well, for one thing, you're creating half a million xrange objects in
> > the course of the search.  All the C code has
> > to do is increment a few integers.
>
> I don't think the creation of xrange objects is a meaningful part of
> Python's execution time here.  Consider:
> [...]

Agreed---I just came to the same conclusion after doing some tests.
So maybe it's the billion or so integer objects being created that
dominate the running time?  (Not sure how many integer objects
actually are created here: doesn't Python cache *some* small
integers?)

Mark




From joemystery123 at gmail.com  Fri Sep 21 08:42:34 2007
From: joemystery123 at gmail.com (crybaby)
Date: Fri, 21 Sep 2007 05:42:34 -0700
Subject: newb: BeautifulSoup
In-Reply-To: <1190360304.800016.219320@k79g2000hse.googlegroups.com>
References: <1190343890.375836.78630@r29g2000hsg.googlegroups.com>
	<1190360304.800016.219320@k79g2000hse.googlegroups.com>
Message-ID: <1190378554.524052.220750@22g2000hsm.googlegroups.com>

I added extra td tags to your example, for whatever reason I am
getting None. When I do the following:

print all_tds[0].string
print all_tds[8].string


from BeautifulSoup import BeautifulSoup

doc = """
<html>
    <head>
        <title></title>
    </head>
    <body>
        <table>
        </table>

        <table>
            <tr><td>hello</td></tr>
            <tr><td>world</td><td>goodbye</td></tr>
              <tr>
              <td width=1 height=0 bgcolor="#800000"><img src="/img/
spacer.gif" width=1 height=0 alt="|"/></td>
              <td align=right width=80><font size=2 face="New Times
Roman,Times,Serif">&nbsp;48.884&nbsp;</font></td>
              <td width=1 height=0 bgcolor="#800000"><img src="/img/
spacer.gif" width=1 height=0 alt="|"/></td>
              <td align=right width=80><font size=2 face="New Times
Roman,Times,Serif">&nbsp;49.950&nbsp;</font></td>
              <td width=1 height=0 bgcolor="#800000"><img src="/img/
spacer.gif" width=1 height=0 alt="|"/></td>
              <td align=right width=80><font size=2 face="New Times
Roman,Times,Serif">&nbsp;69.322&nbsp;</font></td>
              <td width=1 height=0 bgcolor="#800000"><img src="/img/
spacer.gif" width=1 height=0 alt="|"/></td>
              <td align=right width=80><font size=2 face="New Times
Roman,Times,Serif">&nbsp;99.740&nbsp;</font></td>
              <td width=1 height=0 bgcolor="#800000"><img src="/img/
spacer.gif" width=1 height=0 alt="|"/></td>
            </tr>
        </table>
    </body>
</html>
"""

soup = BeautifulSoup(doc)

tables = soup.findAll('table')
target_table = tables[1]

all_tds = target_table.findAll('td')
print all_tds[0].string
print all_tds[8].string
tds_str = all_tds[8].string
print tds_str

Output I am getting is following:

>>> hello
None
None

I am not sure why I am getting None for these lines:

print all_tds[0].string
print all_tds[8].string

On Sep 21, 3:38 am, 7stud <bbxx789_0... at yahoo.com> wrote:
> On Sep 20, 9:04 pm, crybaby <joemystery... at gmail.com> wrote:
>
> > I need to traverse a html page with big table that has many row and
> > columns.  For example, how to go 35th td tag and do regex to retireve
> > the content.  After that is done, you move down to 15th td tag from
> > 35th tag (35+15) and do regex to retrieve the content?
>
> 1) You can find your table using one of these methods:
>
> a)
> target_table = soup.find('table', id='car_parts')
>
> b)
> tables = soup.findall('table')
> target_table = tables[2]
>
> The tables are put in a list in the order that they appear on the
> page.
>
> 2) You can get all the td's in the table using this statement:
>
> all_tds = target_table.findall('td')
>
> 3) You can get the contents of the tags using these statements:
>
> print all_tds[34].string
> print all_tds[49].string
>
> Here is an example:
>
> from BeautifulSoup import BeautifulSoup
>
> doc = """
> <html>
>     <head>
>         <title></title>
>     </head>
>     <body>
>         <table>
>         </table>
>
>         <table>
>             <tr><td>hello</td></tr>
>             <tr><td>world</td><td>goodbye</td></tr>
>         </table>
>     </body>
> </html>
> """
>
> soup = BeautifulSoup(doc)
>
> tables = soup.findAll('table')
> target_table = tables[1]
>
> all_tds = target_table.findAll('td')
> print all_tds[0].string
> print all_tds[2].string
>
> --output:--
> hello
> goddbye




From thorsten at thorstenkampe.de  Mon Sep  3 14:45:58 2007
From: thorsten at thorstenkampe.de (Thorsten Kampe)
Date: Mon, 3 Sep 2007 19:45:58 +0100
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<87hcmhebwv.fsf@benfinney.id.au> <5jn9qgFdmbcU3@mid.uni-berlin.de>
	<mailman.187.1188541747.28954.python-list@python.org>
Message-ID: <MPG.214666c1b0e95e6398970e@news.individual.de>

* Terry Reedy (Fri, 31 Aug 2007 02:28:36 -0400)
> "Marc 'BlackJack' Rintsch" <bj_666 at gmx.net> wrote in message 
> news:5jn9qgFdmbcU3 at mid.uni-berlin.de...
> | On Thu, 30 Aug 2007 17:09:36 +1000, Ben Finney wrote:
> | > zzbbaadd at aol.com writes:
> | >> What's with the index() function of lists throwing an exception on not
> | >> found?
> | >
> | > It's letting you know that the item isn't in the list. There's no
> | > sensible return value from an "index" function in that condition.
> |
> | What about -1?  C programmers do this all the time.  :-)
> 
> Because they do not have exceptions. 

They have plenty of - but they can't catch them :)

Thorsten


From bjorn.kempen at gmail.com  Sat Sep 15 17:17:50 2007
From: bjorn.kempen at gmail.com (buffi)
Date: Sat, 15 Sep 2007 21:17:50 -0000
Subject: how could change backcolor of console?
In-Reply-To: <mailman.593.1189888759.2658.python-list@python.org>
References: <mailman.593.1189888759.2658.python-list@python.org>
Message-ID: <1189891070.245458.49100@r29g2000hsg.googlegroups.com>

On Sep 15, 3:55 pm, wan... at 126.com wrote:
>   Hi,everyone:     I am a c programmer,and want using Python instead of C
> I  can  change backcolor using  C,like this:
>
>  textbackground(color);
>
> How can I do in Python?
>
> Best regards
>
> ? ? ? ??? ? ? ? 07 ? ? ? ? ? ? ? ? ? ? ?

textbackground() is not part of the C programming language but rather
a part of an rather old module for msdos.
http://en.wikipedia.org/wiki/Conio.h

If you want terminal colors in python you can use the curses module
but I doubt that it will work in windows.
http://docs.python.org/lib/module-curses.html



From ldo at geek-central.gen.new_zealand  Fri Sep  7 04:12:35 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Fri, 07 Sep 2007 20:12:35 +1200
Subject: Getting original working directory
References: <fbpgvn$sa6$1@sea.gmane.org>
	<1658.1882-17889-1055570935-1189104422@seznam.cz>
	<mailman.177.1189106051.2658.python-list@python.org>
Message-ID: <fbr15j$dha$2@lust.ihug.co.nz>

In message <mailman.177.1189106051.2658.python-list at python.org>, Steve
Holden wrote:

> Python runs as a sub-process. The parent process (the one that started
> Python) contains the working directory that the Python interpreter
> inherited from it. But you can't expect to just go poking around inside
> the environment of your parent process...

Under Linux:

    os.readlink("/proc/%d/cwd" % os.getppid())


From bignose+hates-spam at benfinney.id.au  Wed Sep 12 22:20:41 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 13 Sep 2007 12:20:41 +1000
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<87sl5j5r34.fsf@benfinney.id.au>
	<1189646281.569796.267940@d55g2000hsg.googlegroups.com>
Message-ID: <87ir6f5mrq.fsf@benfinney.id.au>

TheFlyingDutchman <zzbbaadd at aol.com> writes:

> I would mention that an instance is passed as the first parameter
> argument of a method if the methods were declared with the extra
> argument and called with the extra argument:
> 
> a = MyClass()
> 
> my_method(a,someParameter)

Are you unaware that this is the way it works already?

    >>> class Foo(object):
    ...     def bar(self, baz):
    ...         print baz
    ...
    >>> foo = Foo()
    >>> Foo.bar("spam")
    Traceback (most recent call last):
      File "<stdin>", line 1, in ?
    TypeError: unbound method bar() must be called with Foo instance as first argument (got str instance instead)
    >>> Foo.bar(foo, "spam")
    spam
    >>> foo.bar("spam")
    spam

The latter two statements are equivalent. The 'instance.method(args)'
syntax is just sugar for 'Class.method(instance, args)'.

-- 
 \            "Choose mnemonic identifiers. If you can't remember what |
  `\             mnemonic means, you've got a problem."  -- Larry Wall |
_o__)                                                                  |
Ben Finney


From gagsl-py2 at yahoo.com.ar  Fri Sep 14 23:50:50 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 15 Sep 2007 00:50:50 -0300
Subject: reading xls file from python
References: <21903009.66741189806994236.JavaMail.www@wwinf4602>
Message-ID: <op.tyofm0e2x6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 14 Sep 2007 18:56:34 -0300, <hassen62 at voila.fr> escribi?:

> I have installed python 2.5 for windows in my pc, I have a file xls say  
> "file.xls" in c:/python25. How I can read this files from Python. Many  
> thanks in advance.

Try xlrd: http://www.python.org/pypi/xlrd

-- 
Gabriel Genellina



From mensanator at aol.com  Thu Sep 20 19:13:35 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: Thu, 20 Sep 2007 16:13:35 -0700
Subject: I could use some help making this Python code run faster using
	only Python code.
In-Reply-To: <1190328413.226577.206740@k79g2000hse.googlegroups.com>
References: <1190325588.608625.259800@q3g2000prf.googlegroups.com>
	<1190328413.226577.206740@k79g2000hse.googlegroups.com>
Message-ID: <1190330015.131971.265680@y42g2000hsy.googlegroups.com>

On Sep 20, 5:46 pm, Paul Hankin <paul.han... at gmail.com> wrote:
> On Sep 20, 10:59 pm, Python Maniac <raych... at hotmail.com> wrote:
>
> > I am new to Python however I would like some feedback from those who
> > know more about Python than I do at this time.
>
> > def scrambleLine(line):
> >     s = ''
> >     for c in line:
> >         s += chr(ord(c) | 0x80)
> >     return s
>
> > def descrambleLine(line):
> >     s = ''
> >     for c in line:
> >         s += chr(ord(c) & 0x7f)
> >     return s
> > ...
>
> Well, scrambleLine will remove line-endings, so when you're
> descrambling
> you'll be processing the entire file at once. This is particularly bad
> because of the way your functions work, adding a character at a time
> to
> s.
>
> Probably your easiest bet is to iterate over the file using read(N)
> for some small N rather than doing a line at a time. Something like:
>
> process_bytes = (descrambleLine, scrambleLine)[action]
> while 1:
>     r = f.read(16)
>     if not r: break
>     ff.write(process_bytes(r))
>
> In general, rather than building strings by starting with an empty
> string and repeatedly adding to it, you should use ''.join(...)
>
> For instance...
> def descrambleLine(line):
>   return ''.join(chr(ord(c) & 0x7f) for c in line)
>
> def scrambleLine(line):
>   return ''.join(chr(ord(c) | 0x80) for c in line)
>
> It's less code, more readable and faster!

I would have thought that also from what I've heard here.

def scrambleLine(line):
    s = ''
    for c in line:
        s += chr(ord(c) | 0x80)
    return s

def scrambleLine1(line):
    return ''.join([chr(ord(c) | 0x80) for c in line])

if __name__=='__main__':
    from timeit import Timer
    t = Timer("scrambleLine('abcdefghijklmnopqrstuvwxyz')", "from
__main__ import scrambleLine")
    print t.timeit()

##  scrambleLine
##  13.0013366039
##  12.9461998318
##
##  scrambleLine1
##  14.4514098748
##  14.3594400695

How come it's not? Then I noticed you don't have brackets in
the join statement. So I tried without them and got

##  17.6010847978
##  17.6111472418

Am I doing something wrong?

>
> --
> Paul Hankin




From zzbbaadd at aol.com  Mon Sep 10 08:07:47 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Mon, 10 Sep 2007 05:07:47 -0700
Subject: Python syntax wart
In-Reply-To: <1189405211.875217.176620@57g2000hsv.googlegroups.com>
References: <fbvvil$7dj$1@lust.ihug.co.nz>
	<1189405211.875217.176620@57g2000hsv.googlegroups.com>
Message-ID: <1189426067.777376.106470@r34g2000hsd.googlegroups.com>

On Sep 9, 11:20 pm, TheFlyingDutchman <zzbba... at aol.com> wrote:
> It may be that a language that doesn't have a statement terminator
> (which can be end-of-line) needs a statement continuation symbol.
> (Excluding languages like Lisp that have parentheses everywhere).

Actually I guess Python does have a statement terminator - end-of-
line.
If you use end-of-line as your statement terminator it is difficult
and maybe impossible
to avoid a line-continuation character in those situations where you
don't want
an end-of-line to terminate your statement.



From joshua at eeinternet.com  Wed Sep 19 16:58:15 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Wed, 19 Sep 2007 12:58:15 -0800
Subject: A struct for 2.4 that supports float's inf and nan?
Message-ID: <fcs2h9$fnv$1@sea.gmane.org>

I'm trying to put some values into a struct.  Some of these values are NaN
and Inf due to the nature of the data.  As you well may know, struct (and 
other things) in Python <= 2.4 doesn't support inf and nan float values. 
You get the dreaded "SystemError: frexp() result out of range" error.

Before I go and write my own little wrapper, has anyone out there written
an "extended" struct that supports the inf and nan values?  I know this is
fixed in 2.5, but using that isn't an option at this point, as users will
be running older versions of python.

I suppose I could get the relevant source from the 2.5 source and compile it
as a custom package, but that wouldn't be very transparent for my users,
and would probably be getting in way over my head. :)

Ideas?  Suggestions?

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE



From grante at visi.com  Thu Sep  6 22:31:54 2007
From: grante at visi.com (Grant Edwards)
Date: Fri, 07 Sep 2007 02:31:54 -0000
Subject: why should I learn python
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
	<LC_Di.8274$924.7987@newssvr23.news.prodigy.net>
	<1189117798.506367.278560@y42g2000hsy.googlegroups.com>
	<1189118200.040934.151520@57g2000hsv.googlegroups.com>
Message-ID: <13e1e0qmc5o4v79@corp.supernews.com>

On 2007-09-06, Andr? <andre.roberge at gmail.com> wrote:
> On Sep 6, 7:29 pm, windandwaves <nfranc... at gmail.com> wrote:
>> On Sep 7, 9:50 am, James Stroud <jstr... at mbi.ucla.edu> wrote:
>>
>> > Seewww.python.org. Trust us all when we say that its the best.
>>
>> I get that feeling - yes.  Question is:
>>
>> 1. what is it good for?
>
> Pretty much any programming task, except perhaps those that require
> extreme computation speed (like weather modeling).

Even then there are some very powerful numerical and scientific
libraries that are _way_ easier to use from Python that they
are from C and Fortran (the languages in which such libraries
are often written).  You gain 99% of the speed with none of the
pain.

-- 
Grant Edwards                   grante             Yow!  Vote for ME
                                  at               -- I'm well-tapered,
                               visi.com            half-cocked, ill-conceived
                                                   and TAX-DEFERRED!


From bj_666 at gmx.net  Sun Sep  9 02:12:39 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 9 Sep 2007 06:12:39 GMT
Subject: Python syntax wart
References: <fbvvil$7dj$1@lust.ihug.co.nz>
Message-ID: <5khh6nF3i5nuU1@mid.uni-berlin.de>

On Sun, 09 Sep 2007 17:16:05 +1200, Lawrence D'Oliveiro wrote:

> The one thing I don't like about Python syntax is using backslashes to
> continue lines. Yes, you can avoid them if you can include parentheses
> somehow, but this isn't always possible.
> 
> Possible:
>
> [?]
> 
> Not possible:
> 
>     for \
>         Link \
>     in \
>         GetEachRecord \
>           (
>             "links",
>             ("from_episode",),
>             "to_episode = %s",
>             [EpisodeID],
>             "order by when_created"
>           ) \
>     :
>         out.write \
>           (
>                 "<P><A HREF=\"%s\">Back to episode %d</A>\n"
>             %
>                 (
>                     LinkToMe({"ep" : Link["from_episode"]}),
>                     Link["from_episode"]
>                 )
>           )
>     #end for

What do you mean by not possible!?  This compiles fine for me.

Ciao,
	Marc 'BlackJack' Rintsch


From mail at microcorp.co.za  Sat Sep  1 03:36:48 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 1 Sep 2007 09:36:48 +0200
Subject: Is there a simple way to exit a while loop on keystroke?
References: <1188578827.809840.90100@r29g2000hsg.googlegroups.com>
Message-ID: <01f301c7ec71$4b989960$03000080@hendrik>

"gsxg" <rhauff at gmail.com> wrote:

> I am new to python, and have written a simple program to read a port
> via telnet.  I would like it to run until any key is pressed.  Of
> course I wouldn't mind requiring a specific keystroke in the future,
> but I would think this is simpler for now.
> 
> I have used kbhit() and getch() many times in C, but I can't find
> anything similar in  Python.  I am using Linux also, so the msvcrt
> code isn't an option.  I have tried sys.stdin.read(), but that hangs
> UNTIL a key is pressed.

Unblock the stdin using the fcntl module. Then you get an IOError
if there is nothing.

def unblock(f):
    """Given file f , sets it unblock flag to true"""
    fcntl.fcntl(f.fileno(),fcntl.F_SETFL,os.O_NONBLOCK)

f is the file object you get from the open...

hth - Hendrik



From claird at lairds.us  Sun Sep  2 11:39:34 2007
From: claird at lairds.us (Cameron Laird)
Date: Sun, 2 Sep 2007 15:39:34 +0000
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
	<1188735642.391419.103650@19g2000hsx.googlegroups.com>
	<1188740716.423349.304370@y42g2000hsy.googlegroups.com>
	<1188742231.470668.29910@g4g2000hsf.googlegroups.com>
Message-ID: <m22rq4-ud1.ln1@lairds.us>

In article <1188742231.470668.29910 at g4g2000hsf.googlegroups.com>,
Mark Dickinson  <dickinsm at gmail.com> wrote:
>On Sep 2, 9:45 am, jwrweather... at gmail.com wrote:
>> [snip code]
>>
>> Thanks for that. I realise that improving the algorithm will speed
>> things up. I wanted to know why my less than perfect algorithm was so
>> much slower in python than exactly the same algorithm in C. Even when
>> turning off gcc's optimiser with the -O0 flag, the C version is still
>>
>> > 100 times quicker.
>
>Well, for one thing, you're creating half a million xrange objects in
>the course of the search.  All the C code has
>to do is increment a few integers.
>
>Mark
>

Right:  Mr. Dickinson's original question is entirely
legitimate, and it's not adequate to respond, as some
follow-ups did, with ways to improve the Python-coded
algorithm.

The correct answer, which I want to reinforce, is that
the exhibited Python and C versions are NOT "exactly
the same algorithm", at least not without more quali-
fication.  Part of Python expertise is to recognize 
that creation of xrange objects, mentioned above, is
far from free.  Also, -O3 gives C the opportunity,
also remarked in a follow-up, to factor calculations
outside their loops.


From wolf_tracks at invalid.com  Fri Sep 21 16:44:19 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Fri, 21 Sep 2007 20:44:19 GMT
Subject: An Editor that Skips to the End of a Def
In-Reply-To: <46f3708c$0$32593$426a74cc@news.free.fr>
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk>
	<tfAIi.51111$Um6.44314@newssvr12.news.prodigy.net>
	<YPGIi.54591$YL5.26012@newssvr29.news.prodigy.net>
	<874phou1pa.fsf@benfinney.id.au>
	<e8HIi.3303$4J3.1378@newssvr22.news.prodigy.net>
	<46f3708c$0$32593$426a74cc@news.free.fr>
Message-ID: <D2WIi.28146$eY.22404@newssvr13.news.prodigy.net>

Well, you may. Unfortunately, there are many NGs that do the opposite.

Bruno Desthuilliers wrote:
> W. Watson a ?crit :
>> How about in the case of MS Win?
>>
>> Ben Finney wrote:
>>>
>>> (Please don't top-post. Instead, reply below each point to which
>>> you're responding, removing quoted text irrelevant to your response.)
>>>
> 
> Wayne, may I second Ben on his suggestion to stop top-posting ?

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From nagle at animats.com  Sat Sep 29 00:09:22 2007
From: nagle at animats.com (John Nagle)
Date: Sat, 29 Sep 2007 04:09:22 GMT
Subject: Python 3.0 migration plans?
In-Reply-To: <1191010125.107578.67700@g4g2000hsf.googlegroups.com>
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>
	<%q0Li.725$ih1.539@nlpi068.nbdc.sbc.com>
	<1i555ag.9ez4uvf4583jN%aleax@mac.com>
	<ns9Li.1172$4V6.1092@newssvr14.news.prodigy.net>
	<1191010125.107578.67700@g4g2000hsf.googlegroups.com>
Message-ID: <SdkLi.3274$6p6.987@newssvr25.news.prodigy.net>

George Sakkis wrote:
> On Sep 28, 11:53 am, John Nagle <na... at animats.com> wrote:
> 
>> Alex Martelli wrote:
>>> John Nagle <na... at animats.com> wrote:
>>>> TheFlyingDutchman wrote:
>>>>> It seems that Python 3 is more significant for what it removes than
>>>>> what it adds.
>>>>> What are the additions that people find the most compelling?
>>>>     I'd rather see Python 2.5 finished, so it just works.
>>> And I'd rather see peace on Earth and goodwill among men than _either_
>>> Python 3 or your cherished "finished" 2.5 -- the comparison and implied
>>> tradeoff make about as much sense as yours.
>>      Insofar as Python has an organization, it's not adequately managing
>> extension modules.  Each extension module has its own infrastructure,
>> with its own build procedures, its own bug list, and its own maintainers.
>> There's not even an archive.  Unlike CPAN, Cheese Shop is just a directory of
>> URLs.
>>
>>      Take a look at how Perl does it.  Here are the instructions on
>> how to contribute to CPAN:
>>
>>        http://www.cpan.org/modules/04pause.html
>>
>> There's a way to get your module into the system, a standardized format,
>> build, and installation procedure, and an archive which is mirrored.
>> There's a common bug reporting system.  Modules abandoned by their
>> original developers are not lost, and can be "adopted" by someone else.
>>
>>      Python doesn't have any of this.  And that's far more of a problem
>> than Python 3.x.
> 
> Does Perl support extension modules, and if so, are they so prevalent
> as in Python ? 

     Yes, Perl supports non-Perl extension modules.  But most of the
important ones are either maintained as part of the standard Perl distribution,
or supported by the organization that provides whatever they link to.
For example, MySQL AB supports a Perl binding to MySQL, but not a
Python binding.

					John Nagle


From bronger at physik.rwth-aachen.de  Thu Sep  6 18:44:17 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Fri, 07 Sep 2007 00:44:17 +0200
Subject: why should I learn python
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
	<mailman.189.1189118213.2658.python-list@python.org>
Message-ID: <87zlzzs9by.fsf@wilson.homeunix.com>

Hall?chen!

Tom Brown writes:

> [...] Python has been by far the easiest to develop in.  Some
> people might say it is not "real programming" because it is so
> easy.

I can't believe this.  Have you really heard such a statement?

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From kyosohma at gmail.com  Thu Sep  6 14:05:46 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 06 Sep 2007 18:05:46 -0000
Subject: Finding specific date ranges
In-Reply-To: <mailman.163.1189100515.2658.python-list@python.org>
References: <1189090603.285778.282060@g4g2000hsf.googlegroups.com>
	<mailman.161.1189094229.2658.python-list@python.org>
	<1189099759.833051.253020@y42g2000hsy.googlegroups.com>
	<mailman.163.1189100515.2658.python-list@python.org>
Message-ID: <1189101946.318748.99670@y42g2000hsy.googlegroups.com>

On Sep 6, 12:41 pm, Tim Golden <t... at timgolden.me.uk> wrote:
> > Thanks! I'll try it both ways and see if there's any appreciable
> > difference in speed, although since it will be packaged into an
> > executable, that may not be an issue anyway.
>
> > Mike
>
> I honestly doubt there's any advantage to my approach, certainly
> not in terms of speed. It's really only if it happens to suit
> your mind better, or take advantage of structures you might
> already have in place, etc.
>
> TJG

For completeness, here's my method for comparison's sake:

<code>

date_list = [('12/31/2006', '01/13/2007'),
             ('01/14/2007', '01/27/2007'),
             ('01/28/2007', '02/10/2007'),
             ('02/11/2007', '02/24/2007'),
             ('02/25/2007', '03/10/2007'),
             ('03/11/2007', '03/24/2007'),
             ('03/25/2007', '04/07/2007'),
             ('04/08/2007', '04/21/2007'),
             ('04/22/2007', '05/05/2007'),
             ('05/06/2007', '05/19/2007'),
             ('05/20/2007', '06/02/2007'),
             ('06/03/2007', '06/16/2007'),
             ('06/17/2007', '06/30/2007')
             ]
vac_periods = []
found = False
for d in date_list:
    begin = d[0][0:2]
    end = d[1][0:2]
    if begin == end and found == False:
        vac_periods.append(d)
        found = True
    else:
        found = False
print vac_periods

</code>

Isn't it kind of late in the day over there, Tim? Anyway, your method
is probably clearer to read whereas mine doesn't require anything to
be imported. I didn't even realize there was a calendar module...or
maybe I forgot about it.

Mike



From bkline at rksystems.com  Mon Sep 17 16:29:52 2007
From: bkline at rksystems.com (Bob Kline)
Date: Mon, 17 Sep 2007 16:29:52 -0400
Subject: Un(der)documented bits of cgi.py
In-Reply-To: <fcm4cg$e90$1@panix3.panix.com>
References: <mLadnSK4GYnlXnHbnZ2dnUVZ_q2hnZ2d@speakeasy.net>
	<fcm4cg$e90$1@panix3.panix.com>
Message-ID: <hqadnegDidVdfnPbnZ2dneKdnZydnZ2d@speakeasy.net>

Aahz wrote:

> What I suggest doing is submitting a doc patch to 
> http://bugs.python.org/

Done.  Thanks for the suggestion.

Bob


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Sep 24 07:09:54 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 24 Sep 2007 13:09:54 +0200
Subject: Would Anonymous Functions Help in Learning Programming/Python?
In-Reply-To: <13f8r9sj0b9q94e@corp.supernews.com>
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>	<1190412475.772358.109810@n39g2000hsh.googlegroups.com>
	<13f8r9sj0b9q94e@corp.supernews.com>
Message-ID: <46f79aef$0$30457$426a34cc@news.free.fr>

Steven D'Aprano a ?crit :
> On Fri, 21 Sep 2007 22:07:55 +0000, Cristian wrote:
> 
>> True, there is lambda, but that is very limited. It might be useful for
>> key arguments, but not much else.
> 
> No, lambda is useful for anything that any other function is useful for, 
> provided that you can write it as a single expression and not need to use 
> statements. 

Which makes a great difference in practice !-)


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Sep  4 10:20:34 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 04 Sep 2007 16:20:34 +0200
Subject: Printing lists in columns
In-Reply-To: <1188913394.763871.218660@d55g2000hsg.googlegroups.com>
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<mailman.315.1188810174.28954.python-list@python.org>
	<46dbd11e$0$6228$426a74cc@news.free.fr>
	<mailman.317.1188812089.28954.python-list@python.org>
	<1188816626.021956.281040@22g2000hsm.googlegroups.com>
	<5k2cjmF1r2aiU1@mid.uni-berlin.de>
	<1188836008.656284.76160@o80g2000hse.googlegroups.com>
	<46dc6f49$0$6207$426a34cc@news.free.fr>
	<1188900397.459760.259580@k79g2000hse.googlegroups.com>
	<slrnfdqe3t.i4p.hat@se-162.se.wtb.tue.nl>
	<Xns99A17FAC2587duncanbooth@127.0.0.1>
	<1188906767.737741.267350@19g2000hsx.googlegroups.com>
	<Xns99A18F8C528BCduncanbooth@127.0.0.1>
	<1188913394.763871.218660@d55g2000hsg.googlegroups.com>
Message-ID: <46dd69b1$0$24998$426a74cc@news.free.fr>

cjt22 at bath.ac.uk a ?crit :
(snip)

> Thanks guys
> 
> I have a list of lists such as
>  a = ["1" , "2"]  b = ["4", "5", "6"]  c = ["7",8", "9"]
> Stored in another list: d = [a,b,c]
> 
> I know this makes me sound very stupid but how would I specify
> in the parameter the inner lists without having to write them all out
> such as:
> 
> for row in izip_longest(d[0], d[1], d[2], fillvalue='*'):
>     print ', '.join(row)
> 
> i.e. How could I do the following if I didn't know how many list of
> lists I had.

for row in izip_longest(*d, fillvalue='*'):
     print ', '.join(row)


HTH


From steve at holdenweb.com  Wed Sep 26 15:56:07 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 26 Sep 2007 15:56:07 -0400
Subject: regex with specific list of string
In-Reply-To: <1190831706.3397.94.camel@dot.uniqsys.com>
References: <1190821357.753909.178210@50g2000hsm.googlegroups.com>	<fde2i4$9k1$1@sea.gmane.org>
	<1190827835.3397.76.camel@dot.uniqsys.com>	<46FAA145.8050406@decode.com.ar>
	<1190831706.3397.94.camel@dot.uniqsys.com>
Message-ID: <fdedgl$j43$1@sea.gmane.org>

Carsten Haese wrote:
> On Wed, 2007-09-26 at 15:13 -0300, Pablo Ziliani wrote:
>> Carsten Haese wrote:
>>> Unfortunately, that also matches margarine, mayonnaise, and octopus,
>>> just to name a few ;-)
>> (and so does the solution you sent before :)
> 
> No, it doesn't.
> 
>>>> s = set(['jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug',
> ... 'sep', 'oct', 'nov', 'dec'])
>>>> 'margarine' in s
> False
>>>> 'mayonnaise' in s
> False
>>>> 'octopus' in s
> False
> 
>> This is fine IMO since the OP didn't specify the opposite.
> 
> True, but my crystal ball tells me that the OP wants exact matches.
> (Extrapolating from another post made by the OP earlier today, I'm
> guessing he has a list of column names to include in an SQL "order by"
> clause, and he wants to check them for validity first.)
> 
Well, as somebody else already pointed out, the OP's query was 
completely misconceived in the first place, and he would have been 
better recasting it in a more natural way.

However, I am not going to claim that my psychic powers are clearly 
superior to yours ...

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From wolf_tracks at invalid.com  Fri Sep 21 08:34:01 2007
From: wolf_tracks at invalid.com (W. Watson)
Date: Fri, 21 Sep 2007 05:34:01 -0700
Subject: Drawing a 640x480 Raw Image
In-Reply-To: <5lh5q2F87tctU1@mid.uni-berlin.de>
References: <QRGIi.54592$YL5.52604@newssvr29.news.prodigy.net>	<oaHIi.3304$4J3.1437@newssvr22.news.prodigy.net>
	<5lh5q2F87tctU1@mid.uni-berlin.de>
Message-ID: <FROIi.3315$4J3.522@newssvr22.news.prodigy.net>

Very good. I'll give it a try.

Marc 'BlackJack' Rintsch wrote:
> On Thu, 20 Sep 2007 20:49:59 -0700, W. Watson wrote:
> 
>> W. Watson wrote:
>>> I'm getting a 640x480 greyscale image from a video device. I'd like to 
>>> place it on a canvas and then draw on the image. Does PIL or some image 
>>> facility allow me to do that?
>> Corrected misspelling in Subject. The image here is nothing more than a 
>> 640x480 byte array. Each byte is a gra[e]yscale value.
> 
> PIL can do this:
> 
> from PIL import Image
> 
> def main():
>     width = 640
>     height = 480
>     image = Image.new('L', (width, height))
>     data = [x * y % 256 for x in xrange(width) for y in xrange(height)]
>     image.putdata(data)
>     image.save('test.png')
> 
> `data` can be any iterable with byte values.
> 
> Ciao,
> 	Marc 'BlackJack' Rintsch

-- 
                          Wayne Watson (Nevada City, CA)

                        Web Page: <speckledwithStars.net>


From hat at se-162.se.wtb.tue.nl  Tue Sep 25 05:53:50 2007
From: hat at se-162.se.wtb.tue.nl (A.T.Hofkamp)
Date: Tue, 25 Sep 2007 11:53:50 +0200
Subject: sorteddict PEP proposal [started off as orderedict]
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
Message-ID: <slrnffhmle.2ja.hat@se-162.se.wtb.tue.nl>

On 2007-09-25, Mark Summerfield <m.n.summerfield at googlemail.com> wrote:
> If there is positive feedback I will submit the PEP to the reviewers,
> so if you think it is a good idea please say so. (I'm sure that if you
> _don't_ like it you'll tell me anyway:-)

I like the idea, ie +1.

>     This PEP proposes the addition of a sorted dictionary class to the
>     standard library's collections module.

You don't seem to mention the sort criterium. I'd suggest to use the __lt__
operator, which you probably intended since it is commonly used.

Also, can I specify a custom sort function, as with list.sort() ?

>     In addition, the keys() method has two optional arguments:
>
>     keys(firstindex : int = None, secondindex : int = None) -> list of

Not sure this is a good idea. Wouldn't simply

mysorteddict.keys()[firstindex:secondindex]

be much better? It can do all you propose, and more (with iterators/generators
and such). I see no need to implement it inside the sorteddict as well.


>     Since the sorteddict's data is always kept in key order, indexes
>     (integer offsets) into the sorteddict make sense.  Five additional
>     methods are proposed to take advantage of this:
>
>     key(index : int) -> value
>
>     item(index : int) -> (key, value)
>
>     value(index : int) -> key
>
>     set_value(index : int, value)
>
>     delete(index : int)

I wouldn't do this. It breaks compability with the normal dict. A beginning
user will expect dict and sorteddict to behave the same (except for
sortedness), including their set of supporting functions imho.

Otherwise, please make a case for them (and maybe even a new PEP to get them in
both types of dicts).

> Examples
>
>     To keep a collection of filenames on a case-insensitive file
> system in
>     sorted order, we could use code like this:
>
>         files = collections.sorteddict.sorteddict()
>         for name in os.listdir("."):
>             files[name.lower()] = name

The more interesting case would be to you preserve case of the files within the
keys.

I usually need this data structure with an A* algorithm implementation, where I
need to obtain the cheapest solution found so far.

>         for item in listOfItems:
>             itemsByDate["%s\t%17X" % (item.date, id(item))] = item
>             itemsByName["%s\t%17X" % (item.name, id(item))] = item
>             itemsBySize["%s\t%17X" % (item.size, id(item))] = item

Wouldn't a line like "itemsBySize[(item.size, id(item))] = item" do as well?

(or with a custom sort function on items?)

>     Now we can iterate in date or name order, for example:
>
>         for item in itemsByDate:
>             print item.name, item.date

Hmm, not with dict:

>>> for x in {1:10, 2:20}:
...   print x
...
1
2

So you should get your "%s\t%17X" strings here.


Sincerely,
Albert


From zzbbaadd at aol.com  Mon Sep 10 23:33:48 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Mon, 10 Sep 2007 20:33:48 -0700
Subject: Enum class with ToString functionality
In-Reply-To: <87odg99a6p.fsf@benfinney.id.au>
References: <1189416537.050002.61120@r34g2000hsd.googlegroups.com>
	<87bqca9hrw.fsf@benfinney.id.au>
	<1189472591.797327.189180@w3g2000hsg.googlegroups.com>
	<87sl5m7xxm.fsf@benfinney.id.au>
	<1189478288.237609.25140@50g2000hsm.googlegroups.com>
	<87odg99a6p.fsf@benfinney.id.au>
Message-ID: <1189481628.270743.181300@g4g2000hsf.googlegroups.com>

On Sep 10, 8:02 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> TheFlyingDutchman <zzbba... at aol.com> writes:
> > On Sep 10, 7:12 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
> > wrote:
> > > TheFlyingDutchman <zzbba... at aol.com> writes:
> > > > Looking at the documentation it looks excellent. But I don't
> > > > understand the 0.4.2 version number,
>
> > > Note the tag that says the "Development Status" is "Beta".
>
> > What is the difference between this version and the 1.0 version?
>
> I don't know yet, since my time machine is currently in for repairs.
>
> --
>  \      "If you ever reach total enlightenment while you're drinking a |
>   `\   beer, I bet it makes beer shoot out your nose."  -- Jack Handey |
> _o__)                                                                  |
> Ben Finney

When you were developing your Enum module, how did you determine you
were at the 0.4.2 version as opposed to the 0.7.1 version or the 0.9.2
version?



From timaranz at gmail.com  Wed Sep 26 23:16:56 2007
From: timaranz at gmail.com (timaranz at gmail.com)
Date: Wed, 26 Sep 2007 20:16:56 -0700
Subject: Using closures and partial functions to eliminate redundant code
In-Reply-To: <N9EKi.37131$RX.19410@newssvr11.news.prodigy.net>
References: <N9EKi.37131$RX.19410@newssvr11.news.prodigy.net>
Message-ID: <1190863016.582558.139250@r29g2000hsg.googlegroups.com>

On Sep 27, 2:01 pm, Matthew Wilson <m... at tplus1.com> wrote:
> I wrote some code to create a user and update a user on a remote box by
> sending emails to that remote box.  When I was done, I realized that my
> create_user function and my update_user function were effectively
> identical except for different docstrings and a single different value
> inside:
>
>     ### VERSION ONE
>
>     def create_user(username, userpassword, useremail):
>         "Send an email that will create a user in the remote system."
>
>         # Build email
>         email_body = """
>     USERNAME = %s
>     USERPASSWORD = %s
>     USEREMAIL = %s
>     """ % (username, userpassword, useremail)
>
>         # send it.
>         send_email(subject="CREATE", body=email_body)
>
>     def update_user(username, userpassword, useremail):
>         "Send an email that will update a user's password in the remote system."
>
>         # Build email
>         email_body = """
>     USERNAME = %s
>     USERPASSWORD = %s
>     USEREMAIL = %s
>     """ % (username, userpassword, useremail)
>
>         # send it.
>         send_email(subject="UPDATE", body=email_body)
>
>     ### END
>
> Then I came up with this approach to avoid all that redundant text:
>
>     ### VERSION TWO
>
>     def _f(mode):
>
>         if mode not in ("create", "update"):
>             raise ValueError("mode must be create or update!")
>
>         def _g(username, userpassword, useremail):
>
>             # Build email
>             email_body = """
>         USERNAME = %s
>         USERPASSWORD = %s
>         USEREMAIL = %s
>         """ % (username, userpassword, useremail)
>
>             # send it.
>             send_email(subject=mode.upper(), body=email_body)
>
>         # Seems goofy, but other ways are there?
>
>         docstrings = {'create': "Send an email that will create a user in the remote system.",
>                       'update': "Send an email that will update a user's password in the remote system."}
>
>         _g.__doc__ = docstrings[mode]
>
>         return _g
>
>     # Then I created my functions like this:
>
>     v2_create_user = _f("create")
>     v2_update_user = _f("update")
>
>     ### END
>
> Finally, I came up with this approach:
>
>     ### VERSION THREE
>
>     from functools import partial
>
>     def _h(mode, username, userpassword, useremail):
>
>         if mode not in ("create", "update"):
>             raise ValueError("mode must be create or update!")
>
>         # Build email
>         email_body = """
>     USERNAME = %s
>     USERPASSWORD = %s
>     USEREMAIL = %s
>     """ % (username, userpassword, useremail)
>
>         # send it.
>         send_email(subject=mode.upper(), body=email_body)
>
>     # I can't figure out how to set up the docstring on these.
>
>     v3_create_user = partial(_h, mode="create")
>     v3_update_user = partial(_h, mode="update")
>
>     ### END
>
> I'm interested to hear how other people deal with really similar code.
> The similarity just bugs me.  However, I wonder if using stuff like
> closures or partial function application is needlessly showy.
>
> Also, I hope anyone here can help me figure out how to attach a
> meaningful docstring for my version three code.
>
> Thanks in advance!
>
> Matt

Without using partials, I would do something like

def _create_or_update_user(mode, username, userpassword, useremail)
   blah, blah, blah

def update_user(username, userpassword, useremail):
   'update doc string'
   return _create_or_update_user('update', username, userpassword,
useremail)

def create_user(username, userpassword, useremail):
   'create doc string'
   return _create_or_update_user('create', username, userpassword,
useremail)

Cheers
Tim



From kyosohma at gmail.com  Fri Sep  7 09:32:28 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 07 Sep 2007 13:32:28 -0000
Subject: Finding specific date ranges
In-Reply-To: <1189122086.388859.146670@r34g2000hsd.googlegroups.com>
References: <1189090603.285778.282060@g4g2000hsf.googlegroups.com>
	<1189122086.388859.146670@r34g2000hsd.googlegroups.com>
Message-ID: <1189171948.864647.83280@57g2000hsv.googlegroups.com>

On Sep 6, 6:41 pm, Zentrader <zentrad... at gmail.com> wrote:
> On Sep 6, 7:56 am, kyoso... at gmail.com wrote:
>
> > December 31, 2006    January 13, 2007 # doesn't earn
> > January 14, 2007        January 27, 2007 # does earn
> > January 28, 2007        February 10, 2007 # doesn't
> > February 11, 2007       February 24, 2007 # does
>
> Am I over simplifying if I say that since it appears to be a two week
> pay period, the date has to be greater than the 11th unless the first,
> or first and second, are on a weekend, in which case it would be > 12
> or > 13?  Or a reasonable facsimile thereof, depending on whether or
> not the two week period is Saturday through Friday.

Yeah it is a 2-week period, but the starting day can change depending
on whether or not you're salaried. I haven't even looked at how we
handle unions. Ugh. But yes, you are correct.

Mike



From raychorn at hotmail.com  Fri Sep 21 13:00:11 2007
From: raychorn at hotmail.com (Python Maniac)
Date: Fri, 21 Sep 2007 10:00:11 -0700
Subject: I could use some help making this Python code run faster using
	only Python code.
In-Reply-To: <Xns99B25B0334892duncanbooth@127.0.0.1>
References: <1190325588.608625.259800@q3g2000prf.googlegroups.com>
	<1190328413.226577.206740@k79g2000hse.googlegroups.com>
	<1190330015.131971.265680@y42g2000hsy.googlegroups.com>
	<1190357165.381313.197910@19g2000hsx.googlegroups.com>
	<Xns99B25B0334892duncanbooth@127.0.0.1>
Message-ID: <1190394011.148384.106280@q3g2000prf.googlegroups.com>

On Sep 21, 12:56 am, Duncan Booth <duncan.bo... at invalid.invalid>
wrote:
> George Sakkis <george.sak... at gmail.com> wrote:
> > It has to do with the input string length; try multiplying it by 10 or
> > 100. Below is a more complete benchmark; for largish strings, the imap
> > version is the fastest among those using the original algorithm. Of
> > course using a lookup table as Diez showed is even faster. FWIW, here
> > are some timings (Python 2.5, WinXP):
>
> > scramble:       1.818
> > scramble_listcomp:      1.492
> > scramble_gencomp:       1.535
> > scramble_map:   1.377
> > scramble_imap:  1.332
> > scramble_dict:  0.817
> > scramble_dict_map:      0.419
> > scramble_dict_imap:     0.410
>
> I added another one:
>
> import string
> scramble_translation = string.maketrans(''.join(chr(i) for i in xrange
> (256)), ''.join(chr(i|0x80) for i in xrange(256)))
> def scramble_translate(line):
>     return string.translate(line, scramble_translation)
>
> ...
>     funcs = [scramble, scramble_listcomp, scramble_gencomp,
>              scramble_map, scramble_imap,
>              scramble_dict, scramble_dict_map, scramble_dict_imap,
>              scramble_translate
>          ]
>
> and I think I win:
>
> scramble:       1.949
> scramble_listcomp:      1.439
> scramble_gencomp:       1.455
> scramble_map:   1.470
> scramble_imap:  1.546
> scramble_dict:  0.914
> scramble_dict_map:      0.415
> scramble_dict_imap:     0.416
> scramble_translate:     0.007

Wow !

Now I am very impressed with Python !

The difference between where I began (70.155 secs) and where we end
(2.278 secs) is a whopping 30.8x faster using some rather simple
techniques that are nothing more than variations on the theme of
hoisting function calls out of loops along with using some very
powerful iterator functions from Python.

My best runtime with Ruby using the same machine and OS was 67.797
secs which is 29.8x slower than the fastest Python runtime.  This
makes Ruby almost as slow as Python was made faster.  The irony with
Ruby was that the use of a hash in Ruby actually made the Ruby code
run slower than when a hash was not used.

Now I think I will code this little scrambler using nothing but the D
Language just to see whether there is any benefit in using D over
Python for this sort of problem.



From __peter__ at web.de  Tue Sep  4 17:06:51 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 4 Sep 2007 23:06:51 +0200
Subject: Undeterministic strxfrm?
References: <ixaDi.63$327.50@read3.inet.fi>
	<mailman.37.1188933223.2658.python-list@python.org>
	<lKiDi.237$327.182@read3.inet.fi>
Message-ID: <fbkhdb$epk$00$1@news.t-online.com>

Am Tue, 04 Sep 2007 19:54:57 +0000 schrieb Tuomas:

> I get the same unstability with my locale 'fi_FI.utf8' too, so I am 
> wondering if the source of the problem is the clib or the Python wrapper 
> around it. Differences in strxfrm results for identical source are 
> allways in the few latest bytes of the results.

Python seems to be the culprit as there is a relatively recent
strxfrm-related bugfix, see

http://svn.python.org/view/python/trunk/Modules/_localemodule.c?rev=54669

If I understand it correctly the error makes it likely that the resulting
string has trailing garbage characters.

Peter


From sysfault at gmail.com  Thu Sep 20 12:22:05 2007
From: sysfault at gmail.com (Anthony Greene)
Date: Thu, 20 Sep 2007 12:22:05 -0400
Subject: os.path.getmtime() and compare with a date type
In-Reply-To: <1190302285.127448.288010@22g2000hsm.googlegroups.com>
References: <1190302285.127448.288010@22g2000hsm.googlegroups.com>
Message-ID: <46F29E2D.2040808@gmail.com>

junchi.tang at gmail.com wrote:
> Hi,
> I am new to python and are tryint to write a simple program delete log
> files that are older than 30 days.
>
> So I used os.path.getmtime(filepath) and compare it with a date but it
> does not compile.
>
> threshold_time = datetime.date.today() - datetime.timedelta(days=30)
> mod_time = os.path.getmtime(file_path)
>
> if( mod_time < threshold_time):
>          #delete file
>
> However the interpreter complains at the if line, say "can't comapre
> datetime.date to int
>
> How can I covert one of them to make it work?
>
> Thank you!
>
>   
You are looking for datetime.datetime.fromtimestamp(mod_time)


From steven.bethard at gmail.com  Thu Sep 27 19:06:25 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 27 Sep 2007 17:06:25 -0600
Subject: getopt with negative numbers?
In-Reply-To: <fdgpic$ssu$00$1@news.t-online.com>
References: <1190913250.198794.269530@k79g2000hse.googlegroups.com>
	<fdgpic$ssu$00$1@news.t-online.com>
Message-ID: <0a6dnQmBPIzuqmHbnZ2dnUVZ_vihnZ2d@comcast.com>

Casey wrote:
> Is there an easy way to use getopt and still allow negative numbers as
> args?
[snip]
> Alternatively, does optparse handle this?

Peter Otten wrote:
> optparse can handle options with a negative int value; "--" can be used to
> signal that no more options will follow:
> 
>>>> import optparse
>>>> parser = optparse.OptionParser()
>>>> parser.add_option("-a", type="int")
> <Option at 0xb7d6fd8c: -a>
>>>> options, args = parser.parse_args(["-a", "-42", "--", "-123"])
>>>> options.a
> -42
>>>> args
> ['-123']

In most cases, argparse (http://argparse.python-hosting.com/) supports 
negative numbers right out of the box, with no need to use '--':

     >>> import argparse
     >>> parser = argparse.ArgumentParser()
     >>> parser.add_argument('-a', type=int)
     >>> parser.add_argument('b', type=int)
     >>> args = parser.parse_args('-a -42 -123'.split())
     >>> args.a
     -42
     >>> args.b
     -123


STeVe


From paul.hankin at gmail.com  Tue Sep 25 14:22:03 2007
From: paul.hankin at gmail.com (Paul Hankin)
Date: Tue, 25 Sep 2007 18:22:03 -0000
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <1190721061.573653.304110@r29g2000hsg.googlegroups.com>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
Message-ID: <1190744523.025029.227690@k79g2000hse.googlegroups.com>

On Sep 25, 12:51 pm, Mark Summerfield <m.n.summerfi... at googlemail.com>
wrote:
> On 25 Sep, 12:19, Paul Hankin <paul.han... at gmail.com> wrote:
>
>
>
> > Recall sorted...
> >     sorted(iterable, cmp=None, key=None, reverse=False) --> new sorted
> > list
>
> > So why not construct sorteddicts using the same idea of sortedness?
>
> > sorteddict((mapping | sequence | nothing), cmp=None, key=None,
> > reverse=None)
>
> > Then we can specify the exact behaviour of sorteddicts: it's the same
> > as a regular dict, except when the order of keys is important they're
> > ordered as if they were sorted by sorted(keys, cmp=sd._cmp,
> > key=sd._key, reverse=sd._reverse). Here I imagine cmp, key and reverse
> > are stored in the new sorteddict as attributes _cmp, _key, _reverse -
> > obviously the actual implementation may differ.
>
> > This has the benefit of making sorteddict's behaviour explicit and
> > easy to understand, and doesn't introduce a new sorting API when we
> > already have a perfectly decent one.
>
> > The only problem here is the **kwargs form of the dict constructor
> > doesn't translate as we're using keyword args to pass in the sort
> > criterion. Perhaps someone has an idea of how this can be solved. If
> > nothing else, this constructor could be dropped for sorteddicts, and
> > sorteddict(dict(**kwargs), cmp=..., key=..., reverse=...) when that
> > behaviour is wanted.
>
> > I don't like the integral indexing idea or the slicing: indexing and
> > slicing are already part of python and it's bad to have different
> > syntax for the same concept on sorteddicts. I'd say it's not an
> > important enough for sorteddicts anyway.
>
> > --
> > Paul Hankin
>
> This makes a lot of sense to me. But how do you envisage it would be
> implemented?

Here's a first go. Sorting occurs when the keys are iterated over,
making it fast (almost as a dict) for construction, insertion, and
deletion, but slow if you're iterating a lot. You should look at some
use cases to decide if this approach is best, or if a sorted
datastructure should be used instead, but my instinct is that this is
a decent approach. Certainly, you're unlikely to get a simpler
implementation :)

class sorteddict(dict):
    "A sorted dictionary"
    def __init__(self, arg=None, cmp=None, key=None, reverse=False):
        if arg:
            super(sorteddict, self).__init__(arg)
        else:
            super(sorteddict, self).__init__()
        self._cmp = cmp
        self._key = key
        self._reverse = reverse
    def keys(self):
        return sorted(super(sorteddict, self).keys(), cmp=self._cmp,
            key=self._key, reverse=self._reverse)
    def iter_keys(self):
        return (s for s in self.keys())
    def items(self):
        return [(key, self[key]) for key in self.keys()]
    def iter_items(self):
        return ((key, self[key]) for key in self.keys())
    def values(self):
        return [self[key] for key in self.keys()]
    def iter_values(self):
        return (self[key] for key in self.keys())
    def __str__(self):
        return '{' + ', '.join('%s: %s' % (repr(k), repr(v))
            for k, v in self.iter_items()) + '}'
    def __repr__(self):
        return str(self)
    def __iter__(self):
        return self.iter_keys()

--
Paul Hankin



From jcd at sdf.lonestar.org  Tue Sep 18 14:16:24 2007
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Tue, 18 Sep 2007 14:16:24 -0400
Subject: adodb with mysql - connection string syntax for filepath
In-Reply-To: <fcok1r$l9$2@sea.gmane.org>
References: <33dffc910709162342x49657895t938fb1f8af2834de@mail.gmail.com>
	<33dffc910709180023w42471f33n5bd76f8b02f40930@mail.gmail.com>
	<fcok1r$l9$2@sea.gmane.org>
Message-ID: <20070918181624.GC1022@sdf.lonestar.org>

On Tue, Sep 18, 2007 at 09:32:45AM -0400, Steve Holden wrote regarding Re: adodb with mysql - connection string syntax for filepath:
> 
> Mridula Ramesh wrote:
> > Hi. Firstly, thank you both very much for the response!
> > 
> > Cliff, I did some more reading up about it after  you corrected me re 
> > MySQL not being a _language_  but another means of storing data (would 
> > you believe NONE of the connection tutorials actually said that?!) 
> > Anyway, now I have MySQL on my machine, and it's installed - if I say 
> > "import MySQLdb" in python prompt, it does that, but I can't see any exe 
> > in the program's folder itself: does that mean tables can only be 
> > created by code? *puzzled*
> > 
> > Steve, thank you too, I looked up the link you had given, but I do not 
> > yet know which part of that site may help me... And I am now going to 
> > struggle with Dive Into Python before attempting much else!
> > 
> > This is a nice, helpful mailing group!
> > 
> We try, though not everyone appreciates us :-)
> 
> You may find
> 
>    http://www.connectionstrings.com/
> 
> more helpful.
> 
> regard
>   Steve

For non-programmatic (non-python) access, you might also look into the "MySQL GUI Tools" package, freely downloadable from mysql.com.

Cheers,
Cliff


From zzbbaadd at aol.com  Fri Sep 28 18:10:21 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Fri, 28 Sep 2007 15:10:21 -0700
Subject: your opinion on book "Foundations of Python Network Programming"?
In-Reply-To: <1191016773.834049.8940@19g2000hsx.googlegroups.com>
References: <1191016773.834049.8940@19g2000hsx.googlegroups.com>
Message-ID: <1191017421.527084.104240@n39g2000hsh.googlegroups.com>

On Sep 28, 2:59 pm, "kf9... at gmail.com" <kf9... at gmail.com> wrote:
> Hello,
>
> i'm debating if i should buy this book. it received good reviews at
> Amazon:http://tinyurl.com/24zvrf. but it was published in 2004 and
> i'm afraid quite some materials might be outdated? any input?
>
> thanks,
>
> kelie

I have not read this book but just wanted to say, in case you don't
already know, they have Chapter 13 on FTP available as a free download
at the publisher's web site:

http://www.apress.com/book/view/1590593715




From brian.e.munroe at gmail.com  Mon Sep  3 00:37:54 2007
From: brian.e.munroe at gmail.com (Brian Munroe)
Date: Mon, 03 Sep 2007 04:37:54 -0000
Subject: Adding attributes stored in a list to a class dynamically.
In-Reply-To: <13dmehro14cjp05@corp.supernews.com>
References: <mailman.297.1188755850.28954.python-list@python.org>
	<1i3t9va.1jkz4om1sajk8pN%aleax@mac.com>
	<1188769303.724140.248630@d55g2000hsg.googlegroups.com>
	<13dmehro14cjp05@corp.supernews.com>
Message-ID: <1188794274.562413.70140@k79g2000hse.googlegroups.com>

On Sep 2, 3:33 pm, Steven D'Aprano <st... at REMOVE-THIS-
cybersource.com.au> wrote:

>
> In a nutshell, like all double-underscore methods, __setattr__ are for
> overriding behaviour in your own classes. With very few exceptions, you
> shouldn't need to directly call double-underscore methods (although you
> often may _write_ double-underscore methods).
>

I think I understand.  You are saying that if I wanted to override the
normal behavior when doing something like

    p1.firstName = "Brian"

then I'd override __setattr__()?

But if I am doing something like creating dynamic attributes, the more
'correct' way is to use setattr?  Even though they both appear to do
the same thing, the more Pythonic way is to never directly call magic
methods (if you can help it)?

thanks

-- brian



From meesters at uni-mainz.de  Mon Sep 24 10:36:40 2007
From: meesters at uni-mainz.de (Christian Meesters)
Date: Mon, 24 Sep 2007 16:36:40 +0200
Subject: problem writing setup script
Message-ID: <fd8i1o$bbm$1@news1.zdv.uni-mainz.de>

Hi

I have the following file structure

MANIFEST
README
INSTALL -- all text
setup.py
src/
    __init__.py
    foo.py
    for_ext.pyx 

and this setup-script:

import sys
from distutils.core import setup
from distutils.extension import Extension
try:
    from Pyrex.Distutils import build_ext
except ImportError:
    __info__ = """
    Please install Pyrex
    (http://www.cosc.canterbury.ac.nz/greg.ewing/python/Pyrex/)
    before running this setup script.
    """
    sys.exit(__info__)

setup(
    name = "foo",
    # snip
    packages = ['foo'],
    package_dir={'foo': 'src/'},
    package_data = {'foo': ['README', 'INSTALL']},
    ext_package='foo_ext',
    ext_modules = [
        Extension("foo_ext", ["src/foo_ext.pyx"])
        ],
    cmdclass = {'build_ext' : build_ext}
)

Typing 
sudo python setup.py
runs without warning, however, this results in a file
/usr/lib/python2.5/site-packages/foo/foo.py , which I only can import like
import foo.foo
and not
import foo
in order to access foo's namespace.
Furhtermore a file foo_ext.so will be created
in /usr/lib/python2.5/site-packages, but I would like to see it
in /usr/lib/python2.5/site-packages/foo, since importing foo_ext.so only
makes sense for foo.

Does anybody know how I should change my file structure or the setup-script
to achieve those two goals?

TIA
Christian



From mauriceling at acm.org  Thu Sep  6 21:59:17 2007
From: mauriceling at acm.org (Maurice LING)
Date: Fri, 07 Sep 2007 01:59:17 GMT
Subject: [ANN] The Python Papers volume 2 issue 3
Message-ID: <46E0B07B.10003@acm.org>

On behalf of the editorial board of The Python Papers (ISSN 1834-3147), 
we are pleased to announce the release of our latest edition, Volume 2 
Issue 3.

This is an important milestone for all of us as the next issue will mark 
our first year in "press".

Volume 2 Issue 3 can be found at 
http://archive.pythonpapers.org/ThePythonPapersVolume2Issue3.pdf and 
http://www.scribd.com/doc/272054/ThePythonPapersVolume2Issue3

Table of Contents:
Letter from the editor  	                        Pages 3

*Industry Articles*
Python User Group Highlights: Introducing BrisPy 	Pages 5-6
The Barriers Women Face in Tech Communities 	        Pages 7-13
Python Testimonials 	                                Pages 14-17
The Longest Common Substring and Sentence Modification 	Pages 18-27
Python Events 	                                        Page 44

*Peer Reviewed Section*
Pyphant - A Python Framework for Modelling Reusable Information 
Processing Tasks 	                                Pages 28-43


We will like to thank the community for their contributions and support.

Regards
Maurice Ling
Associate Editor


From cjt22 at bath.ac.uk  Mon Sep 24 04:04:58 2007
From: cjt22 at bath.ac.uk (cjt22 at bath.ac.uk)
Date: Mon, 24 Sep 2007 01:04:58 -0700
Subject: Passing parameters at the command line (New Python User)
Message-ID: <1190621098.582906.49760@r29g2000hsg.googlegroups.com>

Hi there. I just wondered whether anyone could recommend the correct
way I should be passing command line parameters into my program. I am
currently using the following code:

def main(argv = None):


    file1=  "directory1"
    file2 =  "directory2"


    if argv is None:
        args = sys.argv[1:]

    if len(args) == 0:
        Initialise.init(0)
        Process.processCon(file1, 0)
        Output.print()

    for i in range(len(args)):
        if args[i] == "-no":
            Initialise.init(0)
            Process.processCon(file2,1)
            Output.print()

        if args[i] == "-not":
           Initialise.init(1)
            Process1.process(stepStore, firstSteps)
            Output.print1()



if __name__ == "__main__":
    main()


Have I used bad syntax here so that a user can either run the program
with commands:
main.py
main.py -no
main.py -not

If I also wanted an option file to be passed in at the command line
for 'main.py' and 'main.py -no' what would be the best way to go about
this? I have never used Python to pass in arguments at the command
line so any help would be much appreciated.

Cheers
Chris



From ldo at geek-central.gen.new_zealand  Sat Sep  8 01:33:46 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Sat, 08 Sep 2007 17:33:46 +1200
Subject: MySQLdb: ValueError Something Stupid
References: <1189163332.990248.134080@d55g2000hsg.googlegroups.com>
Message-ID: <fbtc7q$o0l$1@lust.ihug.co.nz>

In message <1189163332.990248.134080 at d55g2000hsg.googlegroups.com>, mcl
wrote:

> ValueError: invalid literal for int(): 0-

Could it be you have a MySQL column that is declared as some integer type,
but contains this funny "0-" value? So when MySQLdb tries to return it as a
Python integer, it fails to convert.


From hniksic at xemacs.org  Thu Sep  6 05:27:03 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Thu, 06 Sep 2007 11:27:03 +0200
Subject: Autogenerate functions (array of lambdas)
References: <1189067829.685339.50550@y42g2000hsy.googlegroups.com>
Message-ID: <87y7fkf8k8.fsf@mulj.homelinux.net>

Chris Johnson <effigies at gmail.com> writes:

> What I want to do is build an array of lambda functions, like so:
>
> a = [lambda: i for i in range(10)]

Use a factory function for creating the lambdas.  The explicit
function call will force a new variable binding to be created each
time, and the lambda will refer to that binding rather than to the
loop variable binding, which is reused for all loop iterations.  For
example:

def makefn(i):
    return lambda: i

>>> a = [makefn(i) for i in xrange(10)]
>>> [f() for f in a]
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

The alternative is to explicitly import the value into the lambda's
parameter list, as explained by others.


From govisathish at gmail.com  Mon Sep 17 03:50:25 2007
From: govisathish at gmail.com (python_lover)
Date: Mon, 17 Sep 2007 07:50:25 -0000
Subject: Help to start python
In-Reply-To: <1189705101.661806.255580@19g2000hsx.googlegroups.com>
References: <1189693144.493878.130220@w3g2000hsg.googlegroups.com>
	<1189693433.545822.89580@o80g2000hse.googlegroups.com>
	<1189694381.957459.232350@y42g2000hsy.googlegroups.com>
	<1189705101.661806.255580@19g2000hsx.googlegroups.com>
Message-ID: <1190015425.336565.61300@y42g2000hsy.googlegroups.com>

HI,

Please help how to execute a py file with xitami.

I installed xitami , downloaded lrwp file.

accessing the first web application program

import urllib
# Get a file-like object for the Python Web site's home page.
f = urllib.urlopen("http://www.python.org")
# Read from the object, storing the page's contents in 's'.
s = f.read()
f.close()

through browser like "http://localhost/first.py

it is dispaying the source code of the first.py.

Please help me how to execute the file.

thank you.




From perl4hire at softouch.on.ca  Thu Sep 13 23:49:32 2007
From: perl4hire at softouch.on.ca (Amer Neely)
Date: Thu, 13 Sep 2007 23:49:32 -0400
Subject: Coming from Perl - SOLVED
In-Reply-To: <Cv%Fi.198$372.59@read2.cgocable.net>
References: <Cv%Fi.198$372.59@read2.cgocable.net>
Message-ID: <QvnGi.2216$tx1.843@read1.cgocable.net>

Amer Neely wrote:
> I'm a complete newbie with Python, but have several years experience 
> with Perl in a web environment.
> 
> A question I have, if someone here is familiar with Perl, does Python 
> have something like Perl's 'here document'? I've just searched and read 
> some postings on generating HTML but they all seem to refer to various 
> template utilities. Is this the only way, or am I missing something? I'm 
> used to generating X/HTML by hand, which makes the here document in Perl 
> ideal for me. Also, many times a client already existing HTML code that 
> I can use in a script.
> 

In trying to track down why this script would not run on my host, it has 
to come to light that Python is installed, however the Apache module is 
not. So, short story is - I was flogging a dead horse.

Sorry for raising a non-issue folks.

-- 
Amer Neely
w: www.webmechanic.softouch.on.ca/
Perl | MySQL programming for all data entry forms.
"Others make web sites. We make web sites work!"


From zzbbaadd at aol.com  Thu Sep  6 21:19:56 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Thu, 06 Sep 2007 18:19:56 -0700
Subject: Using wild character
In-Reply-To: <mailman.197.1189126396.2658.python-list@python.org>
References: <1189054805.447871.213150@y42g2000hsy.googlegroups.com>
	<1189058095.671230.262190@o80g2000hse.googlegroups.com>
	<5k9pjoF2mrncU1@mid.uni-berlin.de>
	<1189122511.231602.217710@w3g2000hsg.googlegroups.com>
	<mailman.197.1189126396.2658.python-list@python.org>
Message-ID: <1189127996.212274.281760@w3g2000hsg.googlegroups.com>

On Sep 6, 5:53 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Thu, 06 Sep 2007 20:48:31 -0300, Zentrader <zentrad... at gmail.com>
> escribi?:
>
> > On Sep 6, 12:47 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>
> >> Maybe better the ``in`` operator for the '*string*' type.  `str.find()`
> >> will go away in the future.
>
> > string.find serves a useful purpose in that it returns the starting
> > location of the string found, or -1 if not found, so if you wanted to
> > slice "abdecf" on"c", string.find will tell you where that is.
>
> PEP3100 says it will be removed, but at the same time says [UNLIKELY]...
> <http://www.python.org/dev/peps/pep-3100/#id36>
>
> partition serves almost the same purpose and its easier to use.
>
> --
> Gabriel Genellina

The Perl community has an expression "There is more than one way to do
it". As in, Perl is good because you have multiple choices (whether
it's a function/module/class/operator) of how to implement a
particular piece of logic.  More choices is often good, but this can
lead to a problem in that you might be presented with more things to
learn and or you come across less common ways of doing something that
you are not familiar with in code you are trying to understand.

Does the Python community have a position regarding duplicate ways in
the language to achieve something in your code?



From pablo at decode.com.ar  Thu Sep 27 21:23:13 2007
From: pablo at decode.com.ar (Pablo Ziliani)
Date: Thu, 27 Sep 2007 22:23:13 -0300
Subject: ValueError: too many values to unpack
In-Reply-To: <1190941132.060599.89300@57g2000hsv.googlegroups.com>
References: <mailman.1172.1190911576.2658.python-list@python.org>
	<1190941132.060599.89300@57g2000hsv.googlegroups.com>
Message-ID: <46FC5781.6090908@decode.com.ar>

Zentrader wrote:
> On Sep 27, 9:46 am, Shawn Minisall <trekker... at comcast.net> wrote:
>   
>> line 3 - 19.18    29.15    78.75    212.10
>> line 4 - 100    20    410.29
>> And this is the code I'm using:
>>
>>    #read withdrawls from file on line3
>>    line = infile.readline()
>>      #split withdrawls up
>>    withdraw1, withdraw2, withdraw3, withdraw4 = string.split(line, "\t")
>>
>>    #read deposits from file on line4
>>    line = infile.readline()
>>    #split deposits up
>>    deposit1, deposit2, deposit3 = string.split(line, "\t")
>>
>> I have 4 strings to match line 3 and 3 to match the 3 on line 4...any
>> thoughts?
>>     
>
> A string.split returns a list so you don't have to know how many
> elements there are beforehand.  A simple example
> withdraw = line.split("\t")
> if len(withdraw) == 3:
>    match_3(withdraw)
> elif len(withdraw) == 4::
>    match_4(withdraw)
> else:
>    print "line.split() is not 3 or 4", withdraw

Right, and then because error was caused for an unexpected extra tab you 
made the deposit pass as a withdrawal...
Not everybody trades just Zen :)

(tip: the unpacking mystery has been solved earlier this day)

Regards,
Pablo


From nytrokiss at gmail.com  Tue Sep 18 17:45:10 2007
From: nytrokiss at gmail.com (James Matthews)
Date: Tue, 18 Sep 2007 14:45:10 -0700
Subject: How do you limit the # of lines Read?
In-Reply-To: <1190151112.134222.208470@r29g2000hsg.googlegroups.com>
References: <1190149187.799482.151320@19g2000hsx.googlegroups.com>
	<1190151112.134222.208470@r29g2000hsg.googlegroups.com>
Message-ID: <8a6b8e350709181445t6198d2f4t7b701ac2cf91bcf3@mail.gmail.com>

for i in range(<number of times you want to read a line>):
   line = file.readline()

On 9/18/07, John Machin <sjmachin at lexicon.net> wrote:
>
> On Sep 19, 6:59 am, kou... at hotmail.com wrote:
> > I am working on a loop for my code and was wondering if there is a way
> > to limit the number of lines read through?  I'd hate to cut the test
> > file in order to run the code in the testing phase.  Can you add a
> > value in the parenthesis of the readline() function?
> >
> > t = string.readline()  # Limit this somehow?
>
> *STRING*.readline() ????
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
http://www.goldwatches.com/
http://www.jewelerslounge.com
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From vedrandekovic at v-programs.com  Sun Sep 23 05:14:28 2007
From: vedrandekovic at v-programs.com (veki)
Date: Sun, 23 Sep 2007 11:14:28 +0200
Subject: directpython question
Message-ID: <fd5apt029m@enews1.newsguy.com>

Hello,
I've got IBM Thinkpad 30 laptop with configuration:

IBM Thinkpad R30
P3 Mobile Celeron 900mhz
128mb sdram pc133
15gb hdd
cd-rom Teac cd-224e
56K V.90/92
10/100 Ethernet
lpt port
ps2 port
2 x usb port
vga-out
pcmcia

,then I have been install directx 9.0c,Python 2.5 and directpython for
python 2.5.On my two computers directpython works but on this
laptop it don't want work e.g:

When I want execute this script on laptop:

import d3dx
frame=d3dx.Frame(u'SOME FRAME')
frame.mainloop()

I get this error:

Traceback (most recent call last):
  File "C:\Python25\Lib\site-packages\veki1.py", line 2, in <module>
    fr=d3dx.Frame(u'SOME FRAME')
  File "C:\Python25\lib\site-packages\directpy\d3dx.py", line 639, in
__init__
    self._createDevice(area[2:4])
  File "C:\Python25\lib\site-packages\directpy\d3dx.py", line 659, in
_createDevice
    raise RuntimeError("No valid mode found")
RuntimeError: No valid mode found

Regards,
Vedran




From ladynikon at gmail.com  Fri Sep 14 20:35:21 2007
From: ladynikon at gmail.com (Danyelle Gragsone)
Date: Fri, 14 Sep 2007 20:35:21 -0400
Subject: vi and python
Message-ID: <59f9c5160709141735t73b15dbdgde3a21b749ed131f@mail.gmail.com>

Good Evening,

I am running gentoo.  I want to use vi to program in python.  I
wondered are there any other gentooovians out there who know if python
support is already installed.

Thanks,
LadyNikon


From khemkaamit at gmail.com  Mon Sep 24 07:23:07 2007
From: khemkaamit at gmail.com (Amit Khemka)
Date: Mon, 24 Sep 2007 16:53:07 +0530
Subject: sorting a list numbers stored as strings
In-Reply-To: <1190632366.863711.100680@y42g2000hsy.googlegroups.com>
References: <1190632366.863711.100680@y42g2000hsy.googlegroups.com>
Message-ID: <1360b7230709240423k47485263pedc6562000ba1597@mail.gmail.com>

On 9/24/07, aine_canby at yahoo.com <aine_canby at yahoo.com> wrote:
> hi,
>
> I have the following list -
>
> ["1", "11", "2", "22"]
>
> how do I sort it like this -
>
> ["1", "2", "11", "22"]
>

Hi,

>>> l = ["1", "11", "2", "22"]
>>> sorted(l, cmp = lambda x, y: cmp(int(x), int(y)))  # provide your
own compare function !
>>> l
['1', '2', '11', '22']

Cheers,

-- 
----
Amit Khemka
website: www.onyomo.com
wap-site: www.owap.in


From apardon at forel.vub.ac.be  Wed Sep 26 08:22:34 2007
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 26 Sep 2007 12:22:34 GMT
Subject: sorteddict PEP proposal [started off as orderedict]
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>
	<1190753722.026806.254530@d55g2000hsg.googlegroups.com>
	<1190756003.292096.71130@o80g2000hse.googlegroups.com>
	<1190789981.385466.37870@57g2000hsv.googlegroups.com>
	<Xns99B760A3F5859duncanbooth@127.0.0.1>
	<87sl51lshd.fsf@mulj.homelinux.net>
	<1190799759.367001.106400@r29g2000hsg.googlegroups.com>
	<87fy11lo22.fsf@mulj.homelinux.net>
	<1190804538.469582.96950@22g2000hsm.googlegroups.com>
Message-ID: <slrnffkjoa.hc2.apardon@rcpc42.vub.ac.be>

On 2007-09-26, Mark Summerfield <m.n.summerfield at googlemail.com> wrote:
> On 26 Sep, 11:27, Hrvoje Niksic <hnik... at xemacs.org> wrote:
>> Mark Summerfield <m.n.summerfi... at googlemail.com> writes:
>> > On 26 Sep, 09:51, Hrvoje Niksic <hnik... at xemacs.org> wrote:
>> >> Duncan Booth <duncan.bo... at invalid.invalid> writes:
>> >> > I that's the point though: you can't write one implementation
>> >> > that has good performance for all patterns of use
>>
>> >> An implementation of sorted dict using a balanced tree as the
>> >> underlying data structure would give decent performance in all the
>> >> mentioned use cases.  For example, red-black trees search, insert, and
>> >> delete in O(log n) time.
>>
>> > Basically, as implemented, I have to invalidate if there is any
>> > change [...]
>>
>> No argument here, as long as the limitation is understood to be a
>> consequence of the current implementation model.  Seriously proposing
>> a sorteddict that is a mere syntactic sugar over dict dooms the PEP to
>> rejection.
>
> On the Py3K list GvR made it clear that sorteddict wouldn't be in
> Python until an implementation had been in popular use for some
> time... so I will not put forward a PEP for it.
>
>> Major programming language libraries have included sorted mapping and
>> set types for a while now, making the performance and complexity
>> constraints generally well understood.  We should make use of that
>> knowledge when designing sorteddict.
>
> I know! I use Python and C++ and Qt, so what with the STL and Qt's
> containers I'm used to having far more containers to choose from than
> Python offers. I think Python could do with both sorteddict and
> sortedset in the collections module, but to get decent performance
> will require a balanced tree (or a skiplist) implementation, and I
> don't have the time to do that. Apart from Antoon Pardon's AVL tree,
> there's also Chris Gonnerman's RBTree, also pure Python, with a dict
> API and that seems to accept a cmp function, but again, I don't know
> whether it could be adapted to the sorteddict((mapping | sequence |
> nothing), cmp=None, key=None, reverse=None) API that Paul Hankin
> described.

Well you should decide what you want. In a previous exchange one of the
things that was wanted was that you could already seed a tree by using
key word arguments so that you could do the following:

t=Tree(a=15, b=30)

which would be equivallent to:

t=Tree()
t.update(a=15,b=30)

But with the above proposal

t=Tree(cmp=cmp)

is not equivallent to

t=Tree()
t.update(cmp=cmp)

So it seems the API needs some more sorting out.

-- 
Antoon Pardon


From jscrerar at compuserve.com  Sun Sep 30 21:01:14 2007
From: jscrerar at compuserve.com (Jim)
Date: Sun, 30 Sep 2007 18:01:14 -0700
Subject: Command-line does work when scheduled
In-Reply-To: <mailman.1320.1191199291.2658.python-list@python.org>
References: <1191098074.342460.52130@n39g2000hsh.googlegroups.com>
	<mailman.1289.1191100817.2658.python-list@python.org>
	<1191104269.578536.56470@g4g2000hsf.googlegroups.com>
	<mailman.1291.1191113688.2658.python-list@python.org>
	<1191114246.668635.327080@o80g2000hse.googlegroups.com>
	<mailman.1293.1191120273.2658.python-list@python.org>
	<1191163376.067339.34740@d55g2000hsg.googlegroups.com>
	<mailman.1320.1191199291.2658.python-list@python.org>
Message-ID: <1191200474.434274.95150@r29g2000hsg.googlegroups.com>

On Sep 30, 6:37 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Sun, 30 Sep 2007 11:42:56 -0300, Jim <jscre... at compuserve.com> escribi?:
>
>
>
>
>
> > On Sep 29, 8:45 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> > wrote:
> >> The %* at the end is important: if you created the association by using
> >> "Open with...", or selecting Python from the list of installed programs,
> >> very likely the command says only "%1" - that is, the script being open,
> >> but without any additional arguments.
> > I believe I get the correct results as follows:
> > ==============================================
> > Microsoft Windows XP [Version 5.1.2600]
> > (C) Copyright 1985-2001 Microsoft Corp.
>
> > J:\Jim Crerar\mypython\misc>assoc .py
> > .py=Python.File
>
> > J:\Jim Crerar\mypython\misc>ftype Python.File
> > Python.File="E:\Python25\python.exe" "%1" %*
>
> > J:\Jim Crerar\mypython\misc>
> > ===============================================
> > What else could be wrong?
>
> No more ideas... I think the scheduler just executes the command line, and  
> if it works in a console, should work in the scheduler too... Unless you  
> execute the job under another user, who has a different association for  
> .py files, that's the only reason I can think of.
>
> --
> Gabriel Genellina- Hide quoted text -
>
> - Show quoted text -

Just logged into the only other account (my Wife's -- uses only for
hotmail access) and it will not run this scheduled Python program.
Thank you for your help.
Jim



From mail at timgolden.me.uk  Thu Sep 13 04:51:03 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 13 Sep 2007 09:51:03 +0100
Subject: Get the complete command line as-is
In-Reply-To: <1189647903.978946.38350@r29g2000hsg.googlegroups.com>
References: <1189566000.793354.308420@19g2000hsx.googlegroups.com>	<fc83v4$cb3$1@news2.u-psud.fr>
	<1189647903.978946.38350@r29g2000hsg.googlegroups.com>
Message-ID: <46E8F9F7.1000909@timgolden.me.uk>

wangzq wrote:
> On Sep 12, 3:20 pm, Laurent Pointal <laurent.poin... at limsi.fr> wrote:
>> wangzq a ?crit :
>>
>>> Hello,
>>> I'm passing command line parameters to my browser, I need to pass the
>>> complete command line as-is, for example:
>>> test.py "abc def" xyz
>>> If I use ' '.join(sys.argv[1:]), then the double quotes around "abc
>>> def" is gone, but I need to pass the complete command line ("abc def"
>>> xyz) to the browser, how can I do this?
>>> I'm on Windows.
>> As Windows command-line parsing seem to remove some chars, maybe you can
>> try to use the GetCommandLine() function from Win32 API (I dont know if
>> it is available in pywin32 package - you may need to write a wrapper
>> with ctypes).
>>
>> Seehttp://msdn2.microsoft.com/en-us/library/ms683156.aspx
>>
>> A+
>>
>> Laurent.
> 
> Thank you for the tip. It works:
> 
> import ctypes
> 
> p = ctypes.windll.kernel32.GetCommandLineA()
> print ctypes.c_char_p(p).value
> 
> Now I only need to split the whole command line into 3 parts and get
> the last one.

Well, FWIW, it is exposed by pywin32:

<code>
import win32api
print win32api.GetCommandLine ()

</code>

TJG


From carsten at uniqsys.com  Thu Sep  6 14:44:34 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 06 Sep 2007 14:44:34 -0400
Subject: Beginners Query - Simple counter problem
In-Reply-To: <fbpgl2$qls$1@sea.gmane.org>
References: <WZidnbvgAJstpX3bRVnytgA@bt.com>
	<13e0g0id9rlmg71@corp.supernews.com>
	<1189102450.3376.17.camel@dot.uniqsys.com> <fbpgl2$qls$1@sea.gmane.org>
Message-ID: <1189104274.3376.32.camel@dot.uniqsys.com>

On Thu, 2007-09-06 at 11:24 -0700, Ian Clark wrote:
> Carsten Haese wrote: 
> > def d6(count):
> >     return sum(random.randint(1, 6) for die in range(count))
> > 
> 
> My stab at it:
> 
>      >>> def roll(times=1, sides=6):
>      ...     return random.randint(times, times*sides)

That produces an entirely different probability distribution if times>1.
Consider times=2, sides=6. Your example will produce every number
between 2 and 12 uniformly with the same probability, 1 in 11. When
rolling two six-sided dice, the results are not evenly distributed. E.g.
the probability of getting a 2 is only 1 in 36, but the probability of
getting a 7 is 1 in 6.

-- 
Carsten Haese
http://informixdb.sourceforge.net




From ladynikon at gmail.com  Fri Sep 14 18:33:47 2007
From: ladynikon at gmail.com (Danyelle Gragsone)
Date: Fri, 14 Sep 2007 18:33:47 -0400
Subject: Just bought Python in a Nutshell
In-Reply-To: <eb79828c0709141459y264bc21fg4fcd17a4217cad65@mail.gmail.com>
References: <eb79828c0709132112o5a3e7137n5ae5cd55e3e0b839@mail.gmail.com>
	<mailman.520.1189748935.2658.python-list@python.org>
	<1189784843.896396.108960@g4g2000hsf.googlegroups.com>
	<eb79828c0709141312v588ef074w25c2200c37951098@mail.gmail.com>
	<59f9c5160709141412q1098a4cbi989b6eed2f2cc899@mail.gmail.com>
	<eb79828c0709141432t582ddccbsda4750a4011666a9@mail.gmail.com>
	<eb79828c0709141459y264bc21fg4fcd17a4217cad65@mail.gmail.com>
Message-ID: <59f9c5160709141533u7a61df4en54559ed7415bd62d@mail.gmail.com>

awesome!

I should see it in about 2 wks.. im poor.  So I choose super snail mail.

LN


From zzbbaadd at aol.com  Fri Sep 28 12:42:49 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Fri, 28 Sep 2007 09:42:49 -0700
Subject: Python 3.0 migration plans?
In-Reply-To: <mailman.1236.1190995515.2658.python-list@python.org>
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>
	<87641v4j38.fsf@benfinney.id.au>
	<1190949502.875203.57690@w3g2000hsg.googlegroups.com>
	<5m3p1dFbl98pU1@mid.uni-berlin.de>
	<1190968707.799398.232550@19g2000hsx.googlegroups.com>
	<5m4126FbgjabU1@mid.uni-berlin.de>
	<1190993122.979034.305060@50g2000hsm.googlegroups.com>
	<mailman.1236.1190995515.2658.python-list@python.org>
Message-ID: <1190997769.002795.59450@57g2000hsv.googlegroups.com>

>
> Decorators are syntax sugar for higher order functions. Higher order
> functions are a both a basic and a fundamental language feature, and
> exist in many languages. The fact that you don't know this just
> proves, once again, that you like to talk more than you like to learn.

Which of the common languages have higher order functions and what is
the syntax?



From fuzzyman at gmail.com  Sun Sep 30 11:17:48 2007
From: fuzzyman at gmail.com (Fuzzyman)
Date: Sun, 30 Sep 2007 15:17:48 -0000
Subject: How to unload a module after I've imported it.
In-Reply-To: <1191097935.819936.148950@50g2000hsm.googlegroups.com>
References: <1191096194.002683.16240@50g2000hsm.googlegroups.com>
	<1191097935.819936.148950@50g2000hsm.googlegroups.com>
Message-ID: <1191165468.635529.216450@57g2000hsv.googlegroups.com>

On Sep 29, 9:32 pm, marvinla <marvinware2... at gmail.com> wrote:
> Have you tried a del?
>
> >> import socket
> >> dir()
>
> ['__builtins__', '__doc__', '__name__', 'socket']>> del socket
> >> dir()
>
> ['__builtins__', '__doc__', '__name__']
>
> See you!

>>> import socket
>>> import sys
>>> 'socket' in sys.modules
True
>>> del sys.modules['socket']
>>> 'socket' in sys.modules
False

Although as Gabriel says, this may not be the best approach for this
particular need.

A new import will do a full reload of the socket module.

Michael
http://www.manning.com/foord



From fuzzyman at gmail.com  Thu Sep 20 08:55:25 2007
From: fuzzyman at gmail.com (Fuzzyman)
Date: Thu, 20 Sep 2007 12:55:25 -0000
Subject: Using python to create windows apps that everyone can use?
In-Reply-To: <1190279306.582361.272730@19g2000hsx.googlegroups.com>
References: <7C008A37566.00000D2Atomharding@inbox.com>
	<mailman.736.1190143365.2658.python-list@python.org>
	<1190231182.174676.306980@r29g2000hsg.googlegroups.com>
	<1190279306.582361.272730@19g2000hsx.googlegroups.com>
Message-ID: <1190292925.794448.254220@y42g2000hsy.googlegroups.com>

On Sep 20, 10:08 am, "exhuma.twn" <exh... at gmail.com> wrote:
> On Sep 19, 9:46 pm, Simon Hibbs <simon.hi... at gmail.com> wrote:
>
>
>
> >  On 9/18/07, Thomas Harding <tomhard... at inbox.com> wrote:
>
> >  > Hi guys, sorry to post another topic on this, as I am aware that it
> > has
> >  > already been posted a few times, but not with specifically what I
> > am looking
> >  > for. I want an app that makes a gui interface for python (similar
> > to
> >  > Microsoft visual studio or qt designer, not a code based one) and/
> > or an app
> >  > that can make this into a .exe that can be opened by any person on
> > any
> >  > computer without python installed.
>
> > For windows only, there's always Iron Python. This allows you to use
> > Visual Studio, the commercial or the express version, to create the
> > GUI in VB or C# and from that call Python code that does all the heavy
> > lifting.
>
> Any pointers to that. I might have to get started soon with Visual
> Studio, as our company *might* move to an all-windows development
> environment.... *sigh*
>


For an example of a *great* looking application written in IronPython,
checkout Resolver:

http://www.resolversystems.com

:-)

We create our dialogs with the Visual Studio designer (using the free
Visual Studio Express) and then subclass them in IronPython to
implement behaviour. For Windows development, Windows Forms is a great
GUI library.

For a reference to IronPython you could checkouit "IronPython in
Action": http://www.manning.com/foord

:-)

Michael Foord
http://www.ironpython.info/


> /me still hopes that I can convince them that 1) developing on Linux
> is at all not too shabby, and that 2) Python is a great Language! ;)
>
> So far I am making good progress on point 2. :)
>
>
>
> > I'd second the recommendation for QtDesigner if you want cross-
> > platform capability.
>
> > Simon Hibbs




From jeff at jmcneil.net  Thu Sep 27 20:37:22 2007
From: jeff at jmcneil.net (Jeff McNeil)
Date: Thu, 27 Sep 2007 20:37:22 -0400
Subject: How to Catch Errors in SimpleXMLRPCServer
In-Reply-To: <1190937717.905184.256730@g4g2000hsf.googlegroups.com>
References: <1190921745.575519.53560@y42g2000hsy.googlegroups.com>
	<mailman.1184.1190922958.2658.python-list@python.org>
	<1190926533.435603.245530@o80g2000hse.googlegroups.com>
	<mailman.1189.1190927303.2658.python-list@python.org>
	<1190937717.905184.256730@g4g2000hsf.googlegroups.com>
Message-ID: <82d28c40709271737l393695e4if297d7fb7a83e78b@mail.gmail.com>

Cool.. glad it works.  Just be careful not to expose methods you may not
want to; use decorators, attributes, or perhaps a custom method naming
scheme to flag methods as exposed if you do it this way.

On 9/27/07, gregpinero at gmail.com <gregpinero at gmail.com> wrote:
>
> On Sep 27, 5:08 pm, "Jeff McNeil" <j... at jmcneil.net> wrote:
> > Yeah, that code was out of memory and I didn't test it, my apologies.
> > Need to actually return a value from _dispatch.
> >
> > class MyCalls(object):
> >    def _dispatch(self, method, args):
> >        try:
> >            return getattr(self, method)(*args)
> >        except:
> >            handle_logging()
> >
> > server = SimpleXMLRPCServer(("localhost", 8000))
> > server.register_instance(MyCalls())
> > server.serve_forever()
> >
>
> Thanks, that works.  I'm not sure why I didn't notice it wasn't
> returning anything.
>
> -Greg
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From lasses_weil at klapptsowieso.net  Fri Sep  7 15:04:28 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Fri, 07 Sep 2007 21:04:28 +0200
Subject: Organizing Code - Packages
In-Reply-To: <87r6laa0ir.fsf@rudin.co.uk>
References: <1189177596.960379.244990@w3g2000hsg.googlegroups.com>
	<46e17143$0$6189$426a74cc@news.free.fr>
	<1189183088.922537.18290@r34g2000hsd.googlegroups.com>
	<87r6laa0ir.fsf@rudin.co.uk>
Message-ID: <46e1a0bc$0$7689$9b4e6d93@newsspool2.arcor-online.net>

Paul Rudin wrote:
> xkenneth <xkenneth at gmail.com> writes:
> 
>>> Ah, yes, a couple of things:
>>> - avoid the 'one-class-per-file' syndrom. It's perfectly ok to have tens
>> Yes but i find it hard to edit classes easily when I have more than
>> one class per file.
> 
> Why?
Scroll-Blindness would be a good reason.

It would however be completely rediculous to create a file for every 
10-liner class you have (and I have found that Python classes tend to be 
rather short).

/W


From pavlovevidence at gmail.com  Fri Sep 14 04:08:17 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 14 Sep 2007 04:08:17 -0400
Subject: "once" assigment in Python
References: <1189750616.597409.85380@w3g2000hsg.googlegroups.com>
Message-ID: <46ea4381$0$15390$4c368faf@roadrunner.com>

On Fri, 14 Sep 2007 06:16:56 +0000, Lorenzo Di Gregorio wrote:

> Hello,
> 
> I've been using Python for some DES simulations because we don't need
> full C speed and it's so much faster for writing models.  During coding
> I find it handy to assign a variable *unless it has been already
> assigned*: I've found that this is often referred to as "once"
> assigment.

I could see reasons for doing something like this at a module level or 
for attributes; such as setting default values when defaults are 
expensive to calculate.  You could, as others have said, initialize the 
variable to a trivial value and then test whether it still held the 
trivial value later, but what's the point?


> The best I could come up with in Python is:
> 
> try:
>   variable
> except NameError:
>   variable = method()
> 
> I wonder if sombody has a solution (trick, whatever ...) which looks
> more compact in coding.  Something like:
> 
> once(variable, method)
> 
> doesn't work, but it would be perfect.

For module level variables you can do something like this:

def once(symbol,method):
    g = globals()
    if symbol not in g:
        g[symbol] = method() 

You'd have to pass a symbol as a string, but that's no big deal.

For local variables you're stuck with trying to catch UnboundLocalError.  
There's a way to do it by examining stack frames, but I don't really 
recommend it: it's inefficient, and the once assignment doesn't make as 
much sense for local variables.



Carl Banks


From georgerxz at gmail.com  Sun Sep 16 04:50:05 2007
From: georgerxz at gmail.com (GeorgeRXZ)
Date: Sun, 16 Sep 2007 01:50:05 -0700
Subject: Make money to share your videos
In-Reply-To: <1189926238.020357.109060@d55g2000hsg.googlegroups.com>
References: <1189926238.020357.109060@d55g2000hsg.googlegroups.com>
Message-ID: <1189932605.561117.140260@d55g2000hsg.googlegroups.com>

On Sep 16, 12:03 am, ashishmundhara... at gmail.com wrote:
> Goodtolove.com is sharing their 50% adsense revenue with you to post
> videos of anything.
> Just keep up logging in and start posting now to make money...

Could you give details about it ?


GEOrgE
http://zsoftwares.googlepages.com/index.htm



From fakeaddress at nowhere.org  Mon Sep 17 01:57:21 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Sun, 16 Sep 2007 22:57:21 -0700
Subject: Coming from Perl
In-Reply-To: <oPRGi.2430$tx1.886@read1.cgocable.net>
References: <Cv%Fi.198$372.59@read2.cgocable.net>	<1189644803.816375.269950@y42g2000hsy.googlegroups.com>	<b46Gi.221$372.100@read2.cgocable.net>	<87y7fa52ru.fsf@benfinney.id.au>	<jWaGi.224$372.55@read2.cgocable.net>	<mailman.485.1189691416.2658.python-list@python.org>	<d9cGi.356$372.131@read2.cgocable.net>	<mailman.489.1189695918.2658.python-list@python.org>	<iPcGi.357$372.115@read2.cgocable.net>
	<mailman.490.1189698752.2658.python-list@python.org>
	<KgdGi.2174$tx1.172@read1.cgocable.net>
	<A7KGi.8106$z_5.484@nlpi069.nbdc.sbc.com>
	<oPRGi.2430$tx1.886@read1.cgocable.net>
Message-ID: <PGoHi.3595$3Y1.2483@newssvr17.news.prodigy.net>

Amer Neely wrote:
> I don't have shell access but I can run 'which python' from a Perl 
> script, and I will try the different shebang line you suggested.

And after trying it, Amer Neely reported:

> I tried `which python` and `whereis python` and got 0 back as a result. 
> So it seems Python is not installed at all.

Probably right, but just to be thorough...  Since you do not
have shell access, I'm guessing you are running these within
a Perl cgi script, and getting the results via a browser. Is
that right?

Can you backtick other commands? What do you get if you run
`which perl` the same way? How about `whoami`, `whereis sh`,
and `which nosuchthingas5748614`? Can you list /, /bin and
/usr/bin?

How did you learn that this system could run your Perl
scripts? Can that source give us anything to go on here?
If Python is not installed, do you have some avenue for
requesting it?

We're down to long shots. Still, hosts that support Perl
but will not support Python are getting to be the rare.


-- 
--Bryan


From aleax at mac.com  Wed Sep 12 13:05:41 2007
From: aleax at mac.com (Alex Martelli)
Date: Wed, 12 Sep 2007 10:05:41 -0700
Subject: newbie: self.member syntax seems /really/ annoying
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189604018.520338.162520@57g2000hsv.googlegroups.com>
	<46e7f450$0$12305$426a74cc@news.free.fr>
	<1189608231.151112.147550@y42g2000hsy.googlegroups.com>
	<mailman.444.1189611299.2658.python-list@python.org>
Message-ID: <1i4bnbp.1l8sr3mjdojghN%aleax@mac.com>

Chris Mellon <arkanes at gmail.com> wrote:
   ...
> This is terrible and horrible, please don't use it. That said,
> presenting the magic implicit_self context manager!

...which doesn't work in functions -- just try changing your global
code:

>     with implicit_self(t):
>         print a
>         print b
>         a = 40
>         b = a * 2

into a function and a call to it:

    def f():
        with implicit_self(t):
            print a
            print b
            a = 40
            b = a * 2
    f()

...even with different values for the argument to _getframe.  You just
can't "dynamically" add local variables to a function, beyond the set
the compiler has determined are local (and those are exactly the ones
that are *assigned to* in the function's body -- no less, no more --
where "assigned to" includes name-binding statements such as 'def' and
'class' in addition to plain assignment statements, of course).

Making, say, 'a' hiddenly mean 'x.a', within a function, requires a
decorator that suitably rewrites the function's bytecode... (after
which, it WOULD still be terrible and horrible and not to be used, just
as you say, but it might at least _work_;-).  Main problem is, the
decorator needs to know the set of names to be "faked out" in this
terrible and horrible way at the time the 'def' statement executes: it
can't wait until runtime (to dynamically determine what's in var(self))
before it rewrites the bytecode (well, I guess you _could_ arrange a
complicated system to do that, but it _would_ be ridiculously slow).

You could try defeating the fundamental optimization that stands in your
way by adding, say,
    exec 'pass'
inside the function-needing-fakeouts -- but we're getting deeper and
deeper into the mire...;-)


Alex


From paddy3118 at googlemail.com  Fri Sep 28 00:20:36 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Fri, 28 Sep 2007 04:20:36 -0000
Subject: GUI for viewing/editing python data structures?
In-Reply-To: <mailman.1139.1190845438.2658.python-list@python.org>
References: <mailman.1139.1190845438.2658.python-list@python.org>
Message-ID: <1190953236.340024.131370@o80g2000hse.googlegroups.com>

On Sep 26, 11:23 pm, "Joshua J. Kugler" <jos... at eeinternet.com> wrote:
> A while back, I seem to remember coming across a small program that could
> view and edit python data structures via a nice expanding tree view.  I'm
> now in need of something like that (to verify data is imported correctly
> into a shelve file) and having a GUI would be much simpler than trying to
> wade through the output of str(d) or repr(d).
>
> I've tried googling with the obvious keywords (gui (view OR edit) python
> data structures) but t didn't get me anywhere.
>

The magic googling phrase is:
  Python bean-editor

Which gave http://home.gna.org/oomadness/en/editobj/index.html

I've never used it. Could you tell me how you get on?

- Paddy.




From khemkaamit at gmail.com  Fri Sep 14 03:08:09 2007
From: khemkaamit at gmail.com (Amit Khemka)
Date: Fri, 14 Sep 2007 12:38:09 +0530
Subject: mass editing for keys in a dictionary
In-Reply-To: <1189752977.078417.291770@57g2000hsv.googlegroups.com>
References: <1189752977.078417.291770@57g2000hsv.googlegroups.com>
Message-ID: <1360b7230709140008o6e821796t84575a7f68ffd2a9@mail.gmail.com>

On 9/14/07, james_027 <cai.haibin at gmail.com> wrote:
> hi,
>
> How could I transform something like this
>
> dict_1 = {'customer_id':1, 'item_id':3, amount:100}
>
> into
>
> dict_2 = {'customer':1, 'item':3, amount:100}

A one liner would be :

>>> dict_2 = dict([(k.split('_')[0], v) for (k,v) in dict_1.iteritems()])

It would split the keys by '_' and use first part of split as the new key !

You must be aware be careful in cases where there are keys like
'customer_1' , 'customer_2', ...

Cheers,


-- 
----
Amit Khemka
website: www.onyomo.com
wap-site: www.owap.in


From dimitri.pater at gmail.com  Tue Sep 18 03:03:04 2007
From: dimitri.pater at gmail.com (dimitri pater)
Date: Tue, 18 Sep 2007 09:03:04 +0200
Subject: uninstall python2.5 on debian
Message-ID: <e75321bd0709180003v7d67b189v9c9702a60f430a52@mail.gmail.com>

Hello,
both python2.3 and python2.5 are installed on my Debian webserver. For
some reason, I would like to uninstall Python2.5 which was installed
from source (make install) and keep 2.3.
I have tried make uninstall and searched the web, but that did not help me.
I guess rm -Rf python2.5 is not a wise thing to do.

thanks,
Dimitri

-- 
---
You can't have everything. Where would you put it? -- Steven Wright
---
please visit www.serpia.org


From python at cx.hu  Wed Sep  5 19:28:03 2007
From: python at cx.hu (Ferenczi Viktor)
Date: Thu, 6 Sep 2007 01:28:03 +0200
Subject: Any syntactic cleanup likely for Py3? And what about doc
	standards?
In-Reply-To: <1189024274.627827.285050@o80g2000hse.googlegroups.com>
References: <46DEFD2E.5050205@sbcglobal.net>
	<mailman.112.1189022368.2658.python-list@python.org>
	<1189024274.627827.285050@o80g2000hse.googlegroups.com>
Message-ID: <200709060128.03248.python@cx.hu>

Hello,

> > from property_support import hasProperties, Property
> >
> > @hasProperties
> > class Sphere(object):
> > ? ? def setRadius(self, value):
> > ? ? ? ? ... some setter implementation ...
> > ? ? radius=Property(default=1.0, set=setRadius, type=(int, float))
> > ? ? color=Property(default='black', allowNone=True)
> >
> > This is a cleaner syntax if you need automatic default setter/getter
> > implementations with type checking, default values, etc

> I really distaste this "etc." in your description. In the end you
> promote endless lists of command line parameters to configure every
> possible function. I also doubt that the solution is more clean but
> arbitray instead.

Py3K does not enforce any particular use of the class decorator function. This 
was only an example.

> My own guess why properties are not promoted with more emphasis is
> that they lead to cargo cult programming i.e. everyone starts to use
> property syntax even when usual attributes are sufficient. So the
> syntax might even be intentionally ugly.

AFAIK there is no such a thing as "intentionally ugly" in the Python language. 
I've never read this sentence before in manuals, tutorials, etc.

Certainly, an attribute should be replaced by a property if and only if 
additional functionality is required, such as type or value checking, 
calculated value, ability to register observers for various events fired by 
the property and so on.

This is advanced Python programming, not "cargo cult".

Regards, Viktor

PS.: Use Python 1.5.2 if you do not need advanced features. ;-)


From boris.dusek at gmail.com  Sat Sep 15 08:14:49 2007
From: boris.dusek at gmail.com (=?utf-8?B?Qm9yaXMgRHXFoWVr?=)
Date: Sat, 15 Sep 2007 12:14:49 -0000
Subject: int('\x23') != 0x23 (a.k.a convert char to integer of its byte
	representation)
In-Reply-To: <5l1vouF5umvcU1@mid.uni-berlin.de>
References: <1189857328.342615.105660@g4g2000hsf.googlegroups.com>
	<5l1vouF5umvcU1@mid.uni-berlin.de>
Message-ID: <1189858489.438320.259050@22g2000hsm.googlegroups.com>

On Sep 15, 1:59 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> So you are looking for the `struct` module in the standard library instead
> of doing this yourself.  :-)
>
> If you insist on doing it yourself take a look at the built-in `ord()`
> function.
>

Thanks Marc,

both things are exactly what I was looking for (I am a bit ashamed
that I did not find the built-in ord :-)

Boris



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Sep  5 08:22:29 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 05 Sep 2007 14:22:29 +0200
Subject: Accessing Module variables from another Module
In-Reply-To: <1188981521.735630.133060@r29g2000hsg.googlegroups.com>
References: <1188981521.735630.133060@r29g2000hsg.googlegroups.com>
Message-ID: <46de9f7f$0$30604$426a34cc@news.free.fr>

cjt22 at bath.ac.uk a ?crit :
> Hi
> 
> I am new to Python (I have come from a large background of Java) and
> wondered if someone could explain to me how I can access variables
> stored in my main module to other functions within other modules
> called
> from this module
> 
(snip code)
> I am currently just passing the variable in as a parameter

And this is the RightThing(tm) to do.

> but I thought with Python there would be a way to gain direct access
> to
> storeList within the modules called from the top main module?

Yes : passing it as a param !-)

For other modules to get direct access to main.storeList, you'd need 
these modules to import main in these other modules, which would 
introduce circular dependencies, which are something you usuallay don't 
want. Also, and while it's ok to read imported modules attributes, it's 
certainly not a good idea to mutate or rebind them IMHO, unless you're 
ok with spaghetti code.


From ptmcg at austin.rr.com  Thu Sep 13 15:06:51 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Thu, 13 Sep 2007 12:06:51 -0700
Subject: plotting pixels in python
In-Reply-To: <1189708663.253748.323460@y42g2000hsy.googlegroups.com>
References: <1189706620.564963.29690@d55g2000hsg.googlegroups.com>
	<1189707751.846412.51420@r29g2000hsg.googlegroups.com>
	<1189708663.253748.323460@y42g2000hsy.googlegroups.com>
Message-ID: <1189710411.958437.126320@y42g2000hsy.googlegroups.com>

On Sep 13, 1:37 pm, jo5867... at gmail.com wrote:
> On Sep 13, 11:22 pm, Paul McGuire <pt... at austin.rr.com> wrote:
>
> > On Sep 13, 1:03 pm, jo5867... at gmail.com wrote:
>
> > > hi to all
> > > I am just a beginner of python. I want to know how pixels are plotted
> > > in python. I am not intending to use PIL because I don't need to
> > > manipulate images. So is there a simple module for 2D graphics and
> > > plot pixels
>
> > Here is a *very* simple-minded module for creating BMP files, that
> > supports drawing points, lines, and simple shapes.
>
> >http://www.geocities.com/ptmcg/python/index.html#bmp
>
> > -- Paul
>
> No currently I am using a canvas from the Tkinter module
> What I actually want is to show how a line is plotted pixel by pixel
> using a delay loop. I want functions something like putpixel not
> draw_line

Oh!  Google for "bresenham" and then you can plot pixels on your
canvas using that algorithm.

-- Paul



From bj_666 at gmx.net  Wed Sep  5 11:15:43 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 5 Sep 2007 15:15:43 GMT
Subject: Noob: What is a slot? Me trying to understand another's code
References: <mailman.31.1188929003.2658.python-list@python.org>
Message-ID: <5k7vgvF2hu1kU1@mid.uni-berlin.de>

On Tue, 04 Sep 2007 13:03:16 -0500, Carnell, James E wrote:

> I am thinking about purchasing a book, but wanted to make sure I could
> get through the code that implements what the book is about (Artificial
> Intelligence a Modern Approach). Anyway, I'm not a very good programmer
> and OOP is still sinking in, so please don't answer my questions like I
> really know anything.
> 
> MY QUESTION:
> What is a slot? In class Object below the __init__ has a slot.  Note:
> The slot makes use of a data object called 'percept' that is used in the
> TableDrivenAgent(Agent) at the bottom of this post. I am guessing this
> is a type of Finite State Machine (I haven't bought the book yet so I am
> guessing).
> 
> [?]
> 
> Anyway, why a slot (whatever that is)?
> 
> [Example code snipped.]

If you want to learn Python don't do it with that book because the authors
seem to write another programming language using Python syntax. I guess
there's an older issue of that book that used the SmallTalk programming
language and they switched to Python syntactically but not mentally and not
the vocabulary. A "slot" in SmallTalk is called "attribute" in Python.

Ciao,
	Marc 'BlackJack' Rintsch


From Michael.J.Fromberger at Clothing.Dartmouth.EDU  Tue Sep 18 14:51:51 2007
From: Michael.J.Fromberger at Clothing.Dartmouth.EDU (Michael J. Fromberger)
Date: Tue, 18 Sep 2007 14:51:51 -0400
Subject: Parsing problems: A journey from a text file to a directory tree
References: <1189958074.670245.17910@n39g2000hsh.googlegroups.com>
Message-ID: <Michael.J.Fromberger-550C9C.14515118092007@localhost>

In article <1189958074.670245.17910 at n39g2000hsh.googlegroups.com>,
 "Martin M." <martinmichel at ame-electroplating.com> wrote:

> Hi everybody,
> 
> Some of my colleagues want me to write a script for easy folder and
> subfolder creation on the Mac.
> 
> The script is supposed to scan a text file containing directory trees
> in the following format:
> 
> [New client]
> |-Invoices
> |-Offers
> |--Denied
> |--Accepted
> |-Delivery notes
> 
> As you can see, the folder hierarchy is expressed by the amounts of
> minuses, each section header framed by brackets (like in Windows
> config files).
> 
> After the scan process, the script is supposed to show a dialog, where
> the user can choose from the different sections (e.g. 'Alphabet',
> 'Months', 'New client' etc.). Then the script will create the
> corresponding folder hierarchy in the currently selected folder (done
> via AppleScript).
> 
> But currently I simply don't know how to parse these folder lists and
> how to save them in an array accordingly.
> 
> First I thought of an array like this:
> 
> dirtreedb = {'New client': {'Invoices': {}, 'Offers': {'Denied': {},
> 'Accpeted': {}}, 'Delivery notes': {}}}
> 
> But this doesn't do the trick, as I also have to save the hierarchy
> level of the current folder as well...
> 
> Argh, I really don't get my head around this problem and I need your
> help. I have the feeling, that the answer is not that complicated, but
> I just don't get it right now...

Hello, Martin,

A good way to approach this problem is to recognize that each section of 
your proposed configuration represents a kind of depth-first traversal 
of the tree structure you propose to create.  Thus, you can reconstruct 
the tree by keeping track at all times of the path from the "root" of 
the tree to the "current location" in the tree.

Below is one possible implementation of this idea in Python.  In short, 
the function keeps track of a stack of dictionaries, each of which 
represents the contents of some directory in your hierarchy.  As you 
encounter "|--" lines, entries are pushed to or popped from the stack 
according to whether the nesting level has increased or decreased.

This code is not heavily tested, but hopefully it should be clear:

.import re
.
.def parse_folders(input):
.    """Read input from a file-like object that describes directory
.    structures to be created.  The input format is:
.
.    [Top-level name]
.    |-Subdirectory1
.    |--SubSubDirectory1
.    |--SubSubDirectory2
.    |---SubSubSubDirectory1
.    |-Subdirectory2
.    |-Subdirectory3
.
.    The input may consist of any number of such groups.  The result is
.    a dictionary structure in which each key names a directory, and
.    the corresponding value is a dictionary structure showing the
.    contents of that directory, possibly empty.
.    """
.
.    # This expression matches "header" lines, defining a new section.
.    new_re  = re.compile(r'\[([\w ]+)\]\s*$')
.
.    # This expression matches "nesting" lines, defining subdirectories.
.    more_re = re.compile(r'(\|-+)([\w ]+)$')
.    
.    out = {}        # Root:  Maps section names to subtrees.
.    state = [out]   # Stack of dictionaries, current path.
.
.    for line in input:
.        m = new_re.match(line)
.        if m:       # New section begins here...
.            key = m.group(1).strip()
.            out[key] = {}
.            state = [out, out[key]]
.            continue
.
.        m = more_re.match(line)
.        if m:       # Add a directory to an existing section
.            assert state
.            
.            new_level = len(m.group(1))
.            key = m.group(2).strip()
.            
.            while new_level < len(state):
.                state.pop()
.
.            state[-1][key] = {}
.            state.append(state[-1][key])
.
.    return out

To call this, pass a file-like object to parse_folders(), e.g.:

test1 = '''
[New client].
|-Invoices
|-Offers
|--Denied
|--Accepted
|---Reasons
|---Rhymes
|-Delivery notes
'''

    from StringIO import StringIO
    result = parse_folders(StringIO(test1))

As the documentation suggests, the result is a nested dictionary 
structure, representing the folder structure you encoded.  I hope this 
helps.

Cheers,
-M

-- 
Michael J. Fromberger             | Lecturer, Dept. of Computer Science
http://www.dartmouth.edu/~sting/  | Dartmouth College, Hanover, NH, USA


From mauro.tiz at gmail.com  Thu Sep 27 02:32:28 2007
From: mauro.tiz at gmail.com (mauro)
Date: Wed, 26 Sep 2007 23:32:28 -0700
Subject: Python class method as an argument of a function in a C extension
In-Reply-To: <1190826047.552990.47310@n39g2000hsh.googlegroups.com>
References: <1190794562.037602.317840@22g2000hsm.googlegroups.com>
	<1190826047.552990.47310@n39g2000hsh.googlegroups.com>
Message-ID: <1190874748.825324.86260@r29g2000hsg.googlegroups.com>

On 26 Set, 19:00, Matimus <mccre... at gmail.com> wrote:
> > Can anybody give me an hint (or some link) on how to define
> > 'aCFunction' and how to call 'self.myMethod' in the C source code?
>
> A python function defined in C accepts a pointer to self and a tuple
> of arguments, each of which is also a PyObject. If you pass a function
> or method, it will be included in the tuple of arguments. I don't
> think there is any difference between passing a method and a function.
> You can call that method using functions in the `Object Protocol'
> section of the API, such as PyObject_Call(...).
>
> Here is an example from the Python documentation:http://docs.python.org/ext/callingPython.html
>
> The first part shows how to get a function as an argument. The
> following bits of code show how to actually call that function.The
> example uses PyEval_CallObject, which I can't find documentation to.
> I'm not sure if it even exists (it may be a documentation error). But
> from the example it seems to work exactly the same as
> PyObject_CallObject.
>
> Matt

Thanks a lot!
At last I succeeded in finding an example:
http://mail.python.org/pipermail/python-list/1999-May/003441.html
This uses exactly the PyObject_CallObject, as you suggest.

Mauro



From bdesth.quelquechose at free.quelquepart.fr  Thu Sep 27 15:48:22 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 27 Sep 2007 21:48:22 +0200
Subject: How to Catch Errors in SimpleXMLRPCServer
In-Reply-To: <1190921745.575519.53560@y42g2000hsy.googlegroups.com>
References: <1190921745.575519.53560@y42g2000hsy.googlegroups.com>
Message-ID: <46fc0931$0$22333$426a74cc@news.free.fr>

gregpinero at gmail.com a ?crit :
> I have a pretty simple XMLRPCServer, something along the lines of the
> example:
> 
> server = SimpleXMLRPCServer(("localhost", 8000))
> server.register_function(pow)
> server.register_function(lambda x,y: x+y, 'add')
> server.serve_forever()
> 
> Now what I want to do is catch any errors that happen on requests, and
> ideally have them emailed to me.  I have the email part all taken care
> of, I just need to know how to get at the exceptions.

Q&D :

try:
   server.serve_forever()
except Exception, e:
   mail_me_the_exception(e)
   raise


From pyth0nc0d3r at gmail.com  Sun Sep  2 20:54:38 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Sun, 2 Sep 2007 19:54:38 -0500
Subject: Soemthing wrong w/ urllib module or something.
Message-ID: <eb79828c0709021754h17c89a52ld36990c4e2a535c@mail.gmail.com>

Error Message in cmd:
Traceback (most recent call last):
  File "wniamp_lastest5_playlist.py", line 25, in <module>
    response = urllib2.urlopen(request)
  File "C:\Python25\lib\urllib2.py", line 121, in urlopen
    return _opener.open(url, data)
  File "C:\Python25\lib\urllib2.py", line 374, in open
    response = self._open(req, data)
  File "C:\Python25\lib\urllib2.py", line 392, in _open
    '_open', req)
  File "C:\Python25\lib\urllib2.py", line 353, in _call_chain
    result = func(*args)
  File "C:\Python25\lib\urllib2.py", line 1100, in http_open
    return self.do_open(httplib.HTTPConnection, req)
  File "C:\Python25\lib\urllib2.py", line 1075, in do_open
    raise URLError(err)
urllib2.URLError: <urlopen error (10053, 'Software caused connection
abort')>

My script that works almost perfectly cept when trying to post:

import urllib,urllib2
from winamp import *
import winamp
domain = "http://DOMAINHERE/save_play.php"
w = winamp.winamp()
w.dumpList()
List = getTrackList(r"c:\Program Files\Winamp\winamp.m3u")
fList = fixTrackList(List)
x=0
playlist = []
while x < 6:
    if x < (len(fList)-1) or x == (len(fList)-1):
        if fList[x] != "":
            e = "%d.%s" % (x,fList[x])
            playlist.append(e)
        else:
            pass
    else:
        pass
    x = x + 1
ME = "|".join(playlist)
send = {'playlist':ME}
data = urllib.urlencode(send)
request = urllib2.Request(domain,data)
response = urllib2.urlopen(request)
PL = response.read()
if PL == "updated":
    print "Updated Successful."
raw_input("Press anything to close")

For some reason its not acting right when trying to run.  I get that error
message and I never seen anything like it.
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From richyjsm at gmail.com  Sat Sep 22 19:40:36 2007
From: richyjsm at gmail.com (richyjsm at gmail.com)
Date: Sat, 22 Sep 2007 23:40:36 -0000
Subject: Getting rid of bitwise operators in Python 3?
In-Reply-To: <5lllcaF8gic1U12@mid.uni-berlin.de>
References: <46f49740$0$32514$4c368faf@roadrunner.com>
	<miaJi.28220$eY.3184@newssvr13.news.prodigy.net>
	<1190484589.890198.266430@y42g2000hsy.googlegroups.com>
	<SDfJi.54712$YL5.36046@newssvr29.news.prodigy.net>
	<5lllcaF8gic1U12@mid.uni-berlin.de>
Message-ID: <1190504436.192047.173220@n39g2000hsh.googlegroups.com>

On Sep 22, 7:04 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> On Sat, 22 Sep 2007 21:17:38 +0000, Bryan Olson wrote:
> > The operator module offers pow(). Is there any good reason for
> > pow() as a built-in?
>
> The `operator.pow()` is  just the function for ``**``, it lacks the
> optional third argument of the built in `pow()`.
>
> Ciao,
>         Marc 'BlackJack' Rintsch

But does the three-argument version of pow() really belong in the
core?  Who uses it?  It seems very much like a specialist's function
to me:  certainly it wouldn't be out of place in the standard library
somewhere (perhaps a cryptography or number theory module), but in its
three argument form it has to be one of the least used core functions.

Richard



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Sep 24 07:28:15 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 24 Sep 2007 13:28:15 +0200
Subject: Database Abstraction Layer And/Or ORM
In-Reply-To: <mailman.965.1190607960.2658.python-list@python.org>
References: <mailman.965.1190607960.2658.python-list@python.org>
Message-ID: <46f79f3b$0$30457$426a34cc@news.free.fr>

BJ Dierkes a ?crit :
> Hello all,
> 
> I am looking for opinions on preferred methods of Database Abstraction 
> Layer or Object Relation Mapper (I'm using Python 2.5).   I have found a 
> number of options such as those listed here:
> 
> http://wiki.python.org/moin/HigherLevelDatabaseProgramming
> 
> 
> I'm not looking for a holy war based on whether a DAL/ORM *should* be 
> used, and/or if it is preferred over direct access to the database API 
> layer.  I understand that can be a lengthy discussion.  I would just 
> like to see if there is a common 'preferred choice' in the area.  

Well... Then, it seems like SQLAlchemy is getting most of the buzz 
actually !-)



From horpner at yahoo.com  Mon Sep 10 11:24:37 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Mon, 10 Sep 2007 15:24:37 GMT
Subject: Checking if elements are empty
References: <2323A6D37908A847A7C32F1E3662C80E010A0246@dc1ex01.air.org>
	<fbme5d$qa$1@sea.gmane.org>
	<mailman.93.1189003016.2658.python-list@python.org>
	<fbqedh$31g$1@lust.ihug.co.nz>
	<46e115e5$0$7691$9b4e6d93@newsspool2.arcor-online.net>
	<fbsqqs$efc$2@lust.ihug.co.nz>
	<46e2013a$0$7687$9b4e6d93@newsspool2.arcor-online.net>
	<slrnfead5j.mo.horpner@FIAD06.norwich.edu>
	<mailman.321.1189434264.2658.python-list@python.org>
Message-ID: <slrnfeaoed.b4.horpner@FIAD06.norwich.edu>

On 2007-09-10, Chris Mellon <arkanes at gmail.com> wrote:
> On 9/10/07, Neil Cerutti <horpner at yahoo.com> wrote:
>> On 2007-09-08, Wildemar Wildenburger <lasses_weil at klapptsowieso.net> wrote:
>> > Lawrence D'Oliveiro wrote:
>> >>>>> if y[0]:
>> >>>> Not a good idea.
>> >>> Why not?
>> >>
>> >> Because there is a situation where your version of the test
>> >> will fail even if the first element of y is non-null.
>> >
>> > Such as? Seriously people, a little more verbosity wouldn't
>> > hurt here. This isn't a mystery game.
>>
>> >>> if "": True
>> ...
>> >>> if 0: True
>> ...
>> >>> if []: True
>> ...
>> >>> if {}: True
>> ...
>> >>> if None: True
>> ...
>>
>> That's may not be all the possibilities. Lots of Python objects
>> can evaluate to false in a boolean context.
>
> All of these except 0 and None will also return False if you
> check the length. In fact, I am not aware of any builtin where
> len() will return 0, but it will be true in a boolean context.
>
> If you're advocating being more specific in the hope of
> catching errors, this is a pretty terrible example. The OP
> wasn't checking for "null", whatever that means - he was
> checking for the empty string, in a list known (or intended) to
> contain only strings. The simple boolean check is totally
> appropriate.

Agreed; but I prefer 'if y[0] == ""', absent more context and
better names.

-- 
Neil Cerutti


From tdelaney at avaya.com  Mon Sep 24 07:48:38 2007
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Mon, 24 Sep 2007 19:48:38 +0800
Subject: Almost There - os.kill()
In-Reply-To: <003201c7fe9f$a88ff3d0$f9afdb70$@rawlins@thinkbluemedia.co.uk>
Message-ID: <E4C7BCAB1872014F81CEAACD25699B8C0849A8@301081ANEX2.global.avaya.com>

Always be careful with int() incase any of the values have a leading
zero - check the documentation for int() carefully.
 
Cheers,
 
Tim Delaney

________________________________

From: python-list-bounces+tdelaney=avaya.com at python.org
[mailto:python-list-bounces+tdelaney=avaya.com at python.org] On Behalf Of
Robert Rawlins - Think Blue
Sent: Monday, 24 September 2007 5:10 PM
To: 'Robert Rawlins - Think Blue'; python-list at python.org
Subject: RE: Almost There - os.kill()



Woops,

 

Spoke too soon, just wrapped them in int() and it works a charm :-D

 

Rob

 

From: python-list-bounces+robert.rawlins=thinkbluemedia.co.uk at python.org
[mailto:python-list-bounces+robert.rawlins=thinkbluemedia.co.uk at python.o
rg] On Behalf Of Robert Rawlins - Think Blue
Sent: 24 September 2007 12:23
To: python-list at python.org
Subject: Almost There - os.kill()

 

Hello Guys,

 

Finally got around to sitting down to tidy up this script this morning
but I'm having a small syntax problem with os.kill() to kill a process
on my system. Here is the code:

 

def killApplication():

 

       pid = file('/var/lock/MyApplication.lock').read().strip()

       

       logging.info('Killing Application Process: %s' % pid)

 

       os.kill(pid, 15)

 

       logging.info('Application %s Killed' % pid)

 

As you can see if rips the PID from the lock file, which works fine as I
get log data which says 'Killing Application Process: 3079' exactly as I
would expect it too. However when I run this script I get the following
error:

 

Traceback (most recent call last):

  File "/pblue/new/Alive.py", line 50, in ?

    main()

  File "/pblue/new/Alive.py", line 47, in main

    doCheck()

  File "/pblue/new/Alive.py", line 43, in doCheck

    killApplication()

  File "/pblue/new/Alive.py", line 28, in killApplication

    os.kill(pid, 15)

TypeError: an integer is required

 

Which would suggest its passing those arguments in as the wrong data
types to the kill command. What is the best way to convert these?

 

Thanks guys,

 

Rob

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From Shawn at Milochik.com  Tue Sep 18 14:31:03 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Tue, 18 Sep 2007 14:31:03 -0400
Subject: Newbie question
In-Reply-To: <1190139661.046103.45440@19g2000hsx.googlegroups.com>
References: <1190139661.046103.45440@19g2000hsx.googlegroups.com>
Message-ID: <2dc0c81b0709181131u7d2c9406i252a5e31649b37d2@mail.gmail.com>

On 9/18/07, koutoo at hotmail.com <koutoo at hotmail.com> wrote:
> If I have a file name: AVC1030708.14.  How do I strip out certain
> characters from the file name?  I am so used to using MID, LEFT, and
> RIGHT functions, that I have no idea how to do this in python?  I have
> had trouble as well with most newbies on finding the help.  But I have
> used the command line built in help, but with no luck.  Thanks.
>
> Kou


Do you want to strip out specific characters, characters in specific
positions, or characters matching certain patterns?


From gslindstrom at gmail.com  Fri Sep  7 13:24:42 2007
From: gslindstrom at gmail.com (Greg Lindstrom)
Date: Fri, 7 Sep 2007 12:24:42 -0500
Subject: Python and Cron
Message-ID: <a9f39a410709071024u3e669bafu128e8e88c64e072c@mail.gmail.com>

This may be more of a Linux question, but I'm hoping some of you may be able
to help me.

I have a python (2.4) routine running on Gentoo Linux.  It creates a file
and, after the file is complete, renames the file using the os.rename()
command.  When I run the file from the command line everything works great,
but when I schedule the job to run from the crontab file, the original file
is created and populated, but the rename fails.  I am using full paths for
both the original and destination file, and run the command line version
after I 'su' to the production account (named 'edith').  I am told by my
sysadmin that the cron jobs run as edith as well, so he does not think it is
a permission issue (he points out the original file is being created and
populated as expected...the rename fails)

Have any of you dealt with anything like this?  It really has me scratching
my head.

Thanks,
--greg
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From rt at nospam.com  Fri Sep 21 15:31:14 2007
From: rt at nospam.com (Richard Townsend)
Date: Fri, 21 Sep 2007 20:31:14 +0100
Subject: Resolving windows shortcut to url
Message-ID: <lh68f3dskbiosrr98qideunruumqme1kel@4ax.com>

If I have a windows shortcut to a URL, is there a way to get the URL
in a Python app?

I found some code that uses pythoncom to resolve shortcuts to local
files, but I haven't found any examples for URLs.

The PyWin32 help mentions the PyIUniformResourceLocator Object, but I
couldn't find an example of how to use it.



From wesbrooks at gmail.com  Wed Sep  5 04:12:45 2007
From: wesbrooks at gmail.com (Wesley Brooks)
Date: Wed, 5 Sep 2007 09:12:45 +0100
Subject: Calling a dos batch file from python
In-Reply-To: <1188977418.033333.68990@y42g2000hsy.googlegroups.com>
References: <1188913362.279426.290370@r34g2000hsd.googlegroups.com>
	<1188918114.131796.302250@19g2000hsx.googlegroups.com>
	<1188977418.033333.68990@y42g2000hsy.googlegroups.com>
Message-ID: <eec9f8ee0709050112p6e550067v80b4462a04e2add9@mail.gmail.com>

I looked into this a little while ago so I could get the MAC address
of a machine while on linux or windows. Here's a simplified version
that just does the windows side;

self.macMatch = re.compile(r"((\w\w[:-]){5}\w\w)")
data = os.popen("ipconfig /all", 'r')
text = data.read()
tup = self.macMatch.search(text).span()
mac = text[tup[0]:tup[1]].replace('-',':')
return mac

This method allows you to catch the text which would normally be
output to the dos window.

Cheers,

Wes.

On 05/09/07, n o s p a m p l e a s e <nospam.please at alum.com> wrote:
> On Sep 4, 5:01 pm, kyoso... at gmail.com wrote:
> > On Sep 4, 8:42 am, n o s p a m p l e a s e <nospam.ple... at alum.com>
> > wrote:
> >
> > > Suppose I have a batch file called mybatch.bat  and I want to run it
> > > from a python script. How can I call this batch file in python script?
> >
> > > Thanx/NSP
> >
> > The subprocess module should work.
> >
> Thanx to all those who responded. It was quite simple.
>
> import os
> os.system("mybatch.bat")
>
> NSP
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From m.gritsch at gmail.com  Tue Sep 25 07:40:02 2007
From: m.gritsch at gmail.com (Markus Gritsch)
Date: Tue, 25 Sep 2007 13:40:02 +0200
Subject: ANN: 555-BOOM! version 0.6
In-Reply-To: <46F86F35.1070602@cosc.canterbury.ac.nz>
References: <46F86F35.1070602@cosc.canterbury.ac.nz>
Message-ID: <533b7d320709250440x118ff3e0vdf07c9a00a64c065@mail.gmail.com>

Hi Greg,

thank you for this great game!  I like it very much.

Just one thing: Your telephone uses numbers ordered like in this
picture http://www.michaelsiebert.com/img_kontakt/telephone.jpg, so
dialing e.g. 7 triggers 3 impulses.  However, where I live (Austria,
Europe) the telephones had the numbers located like this
http://www.fliesen-niemann.de/img/upload/800px-Telephone-modele-W48.jpg,
so dialing e.g. 7 resulted in 7 impulses.

It would be nice, if the telephone type could be configured in the
menu of the game.

Kind regards,
Markus


From kvs at acm.org  Tue Sep  4 19:29:16 2007
From: kvs at acm.org (Kathryn Van Stone)
Date: Tue, 04 Sep 2007 19:29:16 -0400
Subject: Creating a multi-tier client/server application
In-Reply-To: <1188398008.538820.21960@d55g2000hsg.googlegroups.com>
References: <1188360460.838635.186930@w3g2000hsg.googlegroups.com>
	<7xbqcqhqbw.fsf@ruckus.brouhaha.com>	<46d54ed8$0$429$426a34cc@news.free.fr>
	<1188393925.007952.313110@r29g2000hsg.googlegroups.com>
	<46d57888$0$295$426a74cc@news.free.fr>
	<1188398008.538820.21960@d55g2000hsg.googlegroups.com>
Message-ID: <4D26B820-2AD8-4DDE-9844-E7048EF865F2@acm.org>

Greetings,

I somehow missed some of this thread, but I believe you left a note  
saying that you were not able to do Extreme Programming.

However, based on the description of the size of the project and the  
size of the development team (is there any more than you?) I would  
recommend you consider the following agile techniques:

1. Incremental development
2. Automated testing
3. Continuous integration

I think 1 and 3 are important in giving you a continuously working  
system, along with a working system you can use for feedback during  
the development process. Automated testing would support 1 and 3 and  
keep you from having to do a lot of manual testing.  Wikipedia  
describes most of those terms.

Also think about having acceptance tests that someone besides you can  
verify match the specifications.

Lastly do use the fact that you are (presumably) close to some of  
your customers to use face time for additional communication usually  
needed beyond specs.

I hope this helps. It sounds like a useful project.

Kathy Van Stone
kvs at acm.org


From pablo at decode.com.ar  Sat Sep 29 12:11:33 2007
From: pablo at decode.com.ar (Pablo Ziliani)
Date: Sat, 29 Sep 2007 13:11:33 -0300
Subject: Program inefficiency?
In-Reply-To: <1191079347.192272.240540@22g2000hsm.googlegroups.com>
References: <1191079347.192272.240540@22g2000hsm.googlegroups.com>
Message-ID: <46FE7935.5020305@decode.com.ar>

hall.jeff at gmail.com wrote:
> Is there a solution here that I'm missing? What am I doing that is so
> inefficient?
>   

Hi Jeff,

Yes, it seems you have plenty of performance leaks.
Please see my notes below.

> def massreplace():
>     editfile = open("pathname\editfile.txt")
>     filestring = editfile.read()
>     filelist = filestring.splitlines()
> ##    errorcheck = re.compile('(a name=)+(.*)(-)+(.*)(></a>)+')
>     for i in range(len(filelist)):
>         source = open(filelist[i])
>
>   

Read this post: 
http://mail.python.org/pipermail/python-list/2004-August/275319.html
Instead of reading the whole document, storing it in a variable, 
splitting it and the iterating, you could simply do:

def massreplace():
    editfile = open("pathname\editfile.txt")
    for source in editfile:


>         starttext = source.read()
>         interimtext = replacecycle(starttext)
>         (...)
>   

Excuse me, but this is insane. Do just one call (or none at all, I don't 
see why you need to split this into two functions) and let the function 
manage the replacement "layers".

I'm skipping the next part (don't want to understand all your logic now).

> (...)
>
> def replacecycle(starttext):
>   


Unneeded, IMHO.

>     p1= re.compile('(href=|HREF=)+(.*)(#)+(.*)( )+(.*)(">)+')
>     (...)
>     interimtext = p100.sub(q2, interimtext)
>   

Same euphemism applies here. I might be wrong, but I'm pretty confident 
you can make all this in one simple regex.
Anyway, although regexes are supposed to be cached, don't need to define 
them every time the function gets called. Do it once, outside the 
function. At the very least you save one of the most important 
performance hits in python, function calls. Read this: 
http://wiki.python.org/moin/PythonSpeed/PerformanceTips
Also, if you are parsing HTML consider using BeautifulSoup or 
ElementTree, or something (particularly if you don't feel particularly 
confident with regexes).


Hope you find this helpful.
Pablo


From chris.monsanto at gmail.com  Fri Sep 21 15:50:56 2007
From: chris.monsanto at gmail.com (chris.monsanto at gmail.com)
Date: Fri, 21 Sep 2007 12:50:56 -0700
Subject: RE Help
In-Reply-To: <1190403123.841267.7000@r29g2000hsg.googlegroups.com>
References: <1190399985.324448.242610@d55g2000hsg.googlegroups.com>
	<mailman.884.1190400295.2658.python-list@python.org>
	<1190401551.706792.178450@22g2000hsm.googlegroups.com>
	<mailman.886.1190402711.2658.python-list@python.org>
	<1190403123.841267.7000@r29g2000hsg.googlegroups.com>
Message-ID: <1190404256.185898.305870@50g2000hsm.googlegroups.com>

On Sep 21, 3:32 pm, byte8b... at gmail.com wrote:
> > You'll want to use a non-greedy match:
> > x = re.compile(r"START(.*?)END", re.DOTALL)
> > Otherwise the . will match END as well.
>
> On Sep 21, 3:23 pm, Steve Holden <st... at holdenweb.com> wrote:
>
> > Only if there's a later END in the string, in which case the user's
> > requirements will determine whether greedy matching is appropriate.
>
> > regards
> >   Steve
>
> There will be lots of START END combinations in the data. This is more
> accurate:
>
> sfgdfg*START*dfhdgh*END*dfdgh*START*dfhfdgh*END*dfgsdh*START*sdfhfdhj*END*fdghfdj
>
> The RE should extract the data between each couples of START and END.
>
> Thanks!

You'll want to use my version then. Glad to help!



From george.sakkis at gmail.com  Fri Sep 28 15:45:02 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: Fri, 28 Sep 2007 19:45:02 -0000
Subject: Python 3.0 migration plans?
In-Reply-To: <1191007754.740566.137510@n39g2000hsh.googlegroups.com>
References: <1191002679.569709.16870@22g2000hsm.googlegroups.com>
	<mailman.1242.1191003389.2658.python-list@python.org>
	<1191005906.556751.261940@22g2000hsm.googlegroups.com>
	<5m51l4Fbao07U2@mid.uni-berlin.de>
	<1191007754.740566.137510@n39g2000hsh.googlegroups.com>
Message-ID: <1191008702.579795.141180@r29g2000hsg.googlegroups.com>

On Sep 28, 3:29 pm, TheFlyingDutchman <zzbba... at aol.com> wrote:

> One issue I have with this group and that I encountered many years ago
> in the Perl group is that there is no separate group
> comp.lang.python.beginner where you can ask questions without getting
> hit with RTFM! and the like.

Which shows once again that you're trying to break the world record of
being wrong in as many sentences as possible:

    http://mail.python.org/mailman/listinfo/tutor

You would do yourself (and others) a favor by migrating there for a
few weeks or months.

George



From bignose+hates-spam at benfinney.id.au  Wed Sep 12 22:22:39 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 13 Sep 2007 12:22:39 +1000
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<87sl5j5r34.fsf@benfinney.id.au>
	<mailman.463.1189647729.2658.python-list@python.org>
Message-ID: <87ejh35mog.fsf@benfinney.id.au>

"Peter Decker" <pydecker at gmail.com> writes:

> On 9/12/07, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> > How is that preferable to the magic of "instance is passed as the
> > first argument to a method"?
> 
> So everything that isn't passed explicitly is "magic"?

No. Everything that's not explicit is "magic", in that it potentially
needs to be explained to a newcomer the first time they encounter it.

-- 
 \         "Pinky, are you pondering what I'm pondering?" "I think so, |
  `\    Brain, but if the plural of mouse is mice, wouldn't the plural |
_o__)                   of spouse be spice?"  -- _Pinky and The Brain_ |
Ben Finney


From aleax at mac.com  Sun Sep  2 13:24:55 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 2 Sep 2007 10:24:55 -0700
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
	<1188735642.391419.103650@19g2000hsx.googlegroups.com>
	<1188740716.423349.304370@y42g2000hsy.googlegroups.com>
	<1188742231.470668.29910@g4g2000hsf.googlegroups.com>
	<1i3t4ha.1r0xx7414w0taxN%aleax@mac.com>
	<7xfy1x0zhk.fsf@ruckus.brouhaha.com>
Message-ID: <1i3t5rz.1l19v341prahzxN%aleax@mac.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> wrote:

> aleax at mac.com (Alex Martelli) writes:
> > ...which suggests that creating an xrange object is _cheaper_ than
> > indexing a list...
> 
> Why not re-use the xrange instead of keeping a list around?
> 
>     Python 2.4.4 (#1, Oct 23 2006, 13:58:00) 
>     >>> a = xrange(3)
>     >>> print list(a)
>     [0, 1, 2]
>     >>> print list(a)
>     [0, 1, 2]

Reusing xranges is exactly what my code was doing -- at each for loop
you need an xrange(1, k) for a different value of k, which is why you
need some container to keep them around (and a list of xrange objects is
the simplest applicable container).

Your suggestion doesn't appear to make any sense in the context of the
optimization problem at hand -- what list(...) calls are you thinking
of?!  Please indicate how your suggestion would apply in the context of:

def f3(M=M, solutions=solutions):
    "pull out all the stops"
    xrs = [xrange(1, k) for k in xrange(0, M+1)]
    for a in xrs[M]:
        a2 = a*a
        for b in xrs[M-a]:
            s = a2 + b*b
            for c in xrs[M-a-b]:
                if s == c*c:
                    solutions[a+b+c] += 1


Alex


From dariusjack2006 at yahoo.ie  Thu Sep 20 20:33:48 2007
From: dariusjack2006 at yahoo.ie (http://members.lycos.co.uk/dariusjack/)
Date: Thu, 20 Sep 2007 17:33:48 -0700
Subject: Who can develop the following Python script into working application ?
Message-ID: <1190334828.210230.293980@50g2000hsm.googlegroups.com>

Hi,

I am happy user of Nokia 770 tablett
and one application for  Nokia 770 is maemo mapper (beta navigation
application).
And the following script should run under mm (for Debian).
Its developer told me it wans intended for other developers.
I have no idea how to write Python script
so please tell me how to learn how the following script works and how
to modify it to be fully working,
Frankly speaking I would prefer to pay for your kind assistance
as it may take me to much time to learn some Python and understand the
following script.

I would like to modify it to add 2 more columns to SQL (sqlite3) POI
database, to set proximity value and spead limit as in safety cam POI
in standard car navigation systems.

Please let me know your opinion.

Darius



#!/usr/bin/python2.5
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301  USA

__author__    = "Henri Bergius <henri.bergius at iki.fi>"
__version__   = "0.0.1"
__date__      = "2007-03-06"
__copyright__ = "Copyright (c) 2007 %s. All rights reserved." %
__author__
__licence__   = "LGPL"

import sqlite3
import dbus
import httplib
import os
from xml.dom.minidom import parseString

# Start with getting position from GeoClue
bus = dbus.SessionBus()
# TODO: Get the GeoClue interface to use from /schemas/apps/geoclue/
position/defaultpath
# and /schemas/apps/geoclue/position/defaultserviceGConf keys
proxy_obj =
bus.get_object('org.foinse_project.geoclue.position.hostip', '/org/
foinse_project/geoclue/position/hostip')
geoclue_iface = dbus.Interface(proxy_obj,
'org.foinse_project.geoclue.position')

# Get the coordinates from the service
coordinates = geoclue_iface.current_position()
# We can also use hardcoded
#coordinates[0] = 60.158806494564
#coordinates[1] = 24.9426341056824

print "According to GeoClue you are in %s %s." % (coordinates[0],
coordinates[1])

# Make the HTTP request to the Geonames service
print "Pulling local Wikipedia pages from Geonames"
http_connection = httplib.HTTPConnection("ws.geonames.org")
http_connection.request("GET", "/findNearbyWikipedia?lat=%s" %
coordinates[0] + "&lng=%s" % coordinates[1] + "&maxRows=100")
http_response = http_connection.getresponse()
# TODO: Error handling
xml = http_response.read()

def parse_entries(xml):
    dom = parseString(xml)
    entries = dom.getElementsByTagName('entry')
    results = []
    for entry in entries:
        entry_dictionary = {}
        entry_dictionary['title'] = entry.getElementsByTagName('title')
[0].firstChild.data
        entry_dictionary['summary'] =
entry.getElementsByTagName('summary')[0].firstChild.data + " (source:
Wikipedia)"

        if (entry.getElementsByTagName('feature')[0].firstChild):
            entry_dictionary['feature'] =
entry.getElementsByTagName('feature')[0].firstChild.data

        entry_dictionary['lat'] =
float(entry.getElementsByTagName('lat')[0].firstChild.data)
        entry_dictionary['lon'] =
float(entry.getElementsByTagName('lng')[0].firstChild.data)
        results.append(entry_dictionary)
    return results

entries = parse_entries(xml)

# Open SQLite connection
#sqlite_connection = sqlite3.connect(os.path.expanduser("~/
MyDocs/.documents/poi.db"))
sqlite_connection = sqlite3.connect(os.path.expanduser("/home/user/
MyDocs/.documents/poi.db"))
sqlite_cursor = sqlite_connection.cursor()
for entry in entries:
    # Check if the entry is already in database
    sql_variables = (entry["title"],)
    sqlite_cursor.execute('select poi_id from poi where label=?',
sql_variables)
    existing_entry_id = sqlite_cursor.fetchall()
    if (existing_entry_id):
        print "%s is already in database, skipping" % entry["title"]
        # TODO: Update
    else:
        print "Inserting %s (%s, %s) into POI database" %
(entry["title"], entry["lat"], entry["lon"])
        # TODO: Be smarter about POI categories
        sql_variables = (entry["lat"], entry["lon"], entry["title"],
entry["summary"], 10)
        sqlite_cursor.execute("insert into poi (lat, lon, label, desc,
cat_id) values (?, ?, ?, ?, ?)", sql_variables)

sqlite_connection.commit()
sqlite_cursor.close()
sqlite_connection.close()



From thorsten at thorstenkampe.de  Mon Sep  3 14:51:50 2007
From: thorsten at thorstenkampe.de (Thorsten Kampe)
Date: Mon, 3 Sep 2007 19:51:50 +0100
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<46d674c2$0$417$426a34cc@news.free.fr>
	<878x7te9h4.fsf@benfinney.id.au>
Message-ID: <MPG.2146681e70c0336a98970f@news.individual.de>

* Ben Finney (Thu, 30 Aug 2007 18:02:15 +1000)
> Bruno Desthuilliers <bruno.42.desthuilliers at wtf.websiteburo.oops.com> writes:
> > What's with using your brain instead of whining ?
> 
> Now now, no need for snappiness.

Actually there was. The OP's claim
| There are a million situations where you can have an item not be in
| a list and it is not an exception situation.

...is just plain nonsense. zzbbaadd neither does understand exceptions 
nor what they are used for in Python. An item not being in a list is 
an exception situation /by definition/.

Thorsten


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Sep 26 09:04:54 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 26 Sep 2007 15:04:54 +0200
Subject: An Editor that Skips to the End of a Def
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk> <fd0au1$fro$1@lust.ihug.co.nz>
	<5lhs4pF8bkunU1@mid.individual.net> <fd4168$ige$1@lust.ihug.co.nz>
	<slrnfff9op.1is.horpner@FIAD06.norwich.edu>
	<fd9ncb$q3l$1@lust.ihug.co.nz>
	<slrnffhe9g.2db.hat@se-162.se.wtb.tue.nl>
	<fdcfci$brq$1@lust.ihug.co.nz>
Message-ID: <5lv3nnFacvnmU1@mid.individual.net>

Lawrence D'Oliveiro wrote:

> It's strange, but in nearly 30 years of writing code in dozens of
> different languages, I've never felt the urge to line up my code
> in columns. Never. 

You definitely used the wrong languages :)

http://worsethanfailure.com/Articles/The-Other-Kind-of-RPG.aspx

| Well into the .COM-boom, RPG [Report Program Generator] coders
| were still stuck coding in ?fixed format? style. Prior to that,
| RPG programmers had no choice but to use standard 80-character
| punch-card-length columns with fixed fields. In this format, the
| operator (?opcode? in RPG-speak) goes in columns 26-35, the first
| operand (?Factor 1?) goes in columns 12-25, the second operand
| (?Factor 2?) goes in columns 36-49, and the ?result field? goes in
| columns 50-63. If you do the math, that means that the fields
| (?variables? in modern-speak) were restricted to six characters.
| And of course, all had to be uppercase.      
| 
| RPG IV, the latest incarnation, introduced the concept
| of ?extended? columns with a more relaxed format. Instead of
| having one operation (ADD, SUB, DIV, etc) per line, programmers
| could use the EVAL opcode to do all sorts of crazy things like ?A
| = (B+C) * D?, all with a single line of code. It even afforded
| programmers the luxury of using lowercase letters in variables.     

I demand a Python module implementing this, because I don't like
this bad, liberal Python code today. 8)
 
> That's another issue, that of ROI. Having learnt the vi/vim
> keystrokes, what does that enable you to do? Use vi/vim, and
> that's it. Whereas I've found other situations where subsets of 
> Emacs keystrokes are recognized, such as anything that uses GNU
> readline (including the Python console--see, this IS relevant to
> Python after all)

readline's editing-mode can be emacs or vi (see "man readline").
 
> Making lots of small changes is even worse--it means you're
> jumping into insert mode for shorter times, more frequently.

That's convenient, IMHO. For example, for changing an identifier you
can delete it, activate editing mode and place the cursor where the
name was using just two keystrokes (cw<theword><ESC>). Almost the
same with multiple words, lines, or the line until EOL. For special
needs there is visual mode (like "mouse selection").

This flexibility is admittedly in most cases not suited for
occasional users because it needs much practice. Also, for prompts
a separate insert mode can be strange.
 
> And that's when you discover something else: that how you delete
> text in vi/vim differs, depending on whether it's something you
> just inserted while currently in insert mode, or whether it was
> there from before you last entered insert mode [...]
>
> At least with Emacs, text is text--it doesn't matter when it was
> inserted, it still behaves the same way.

Would you accept that the style of editing is a matter of taste? 

Regards,


Bj?rn

-- 
BOFH excuse #185:

system consumed all the paper for paging



From zyzhu2000 at gmail.com  Fri Sep 14 18:53:12 2007
From: zyzhu2000 at gmail.com (beginner)
Date: Fri, 14 Sep 2007 22:53:12 -0000
Subject: List Comprehension Question: One to Many Mapping?
In-Reply-To: <mailman.241.1187951774.32294.python-list@python.org>
References: <1187929443.636690.287450@i13g2000prf.googlegroups.com>
	<7x8x81l9z3.fsf@ruckus.brouhaha.com>
	<mailman.241.1187951774.32294.python-list@python.org>
Message-ID: <1189810392.985923.181140@w3g2000hsg.googlegroups.com>

On Aug 24, 5:35 am, Boris Borcic <bbor... at gmail.com> wrote:
> Paul Rubin wrote:
> > beginner <zyzhu2... at gmail.com> writes:
> >> For example, if I have x=[ [1,2], [3,4] ]
>
> >> What I want is a new list of list that has four sub-lists:
>
> >> [[1,2], [f(1), f(2)], [3,4], [f(3), f(4)]]
>
> > [[a, map(f,a)] for a in x]
>
> no, that one will be [[[1,2], [f(1), f(2)]], [[3,4], [f(3), f(4)]]]
> eg two sublists instead of four.
>
> [map(g,a) for a in x for g in [None,f]]
>
> will do it.
>
> ...a bit too cleverly, but there's worse :
>
> list((yield a) or map(f,a) for a in x)
>
> Cheers, BB

Really cool!



From kennytilton at optonline.net  Sat Sep 29 03:40:57 2007
From: kennytilton at optonline.net (Ken Tilton)
Date: Sat, 29 Sep 2007 03:40:57 -0400
Subject: The Modernization of Emacs: terminology buffer and keybinding
In-Reply-To: <13frd6vtarbee75@corp.supernews.com>
References: <1182093200.598418.218620@e9g2000prf.googlegroups.com>
	<1182272495.990807.99110@a26g2000pre.googlegroups.com>
	<87tzt3ihev.fsf@kobe.laptop> <m31wg6lre9.fsf@borud.not>
	<1182370216.961241.6960@n60g2000hse.googlegroups.com>
	<85zm2ufjpb.fsf@lola.goethe.zz>
	<1182372592.803332.288260@u2g2000hsc.googlegroups.com>
	<m3myyt47nq.fsf@latakia.dyndns.org>
	<1182549094.366282.286740@m37g2000prh.googlegroups.com>
	<87bqf7fwmg.fsf@telesippa.clsnet.nl>
	<1182553682.197778.138500@g37g2000prf.googlegroups.com>
	<873b0fhokz.fsf@kobe.laptop> <13frd6vtarbee75@corp.supernews.com>
Message-ID: <pmnLi.1684$hP.1048@newsfe12.lga>



Damien Kick wrote:
> Giorgos Keramidas wrote:
> 
>> On Fri, 22 Jun 2007 23:08:02 -0000, nebulous99 at gmail.com wrote:
>>
>>> So much for the "free" in "free software". If you can't actually use
>>> it without paying money, whether for the software or for some book, it
>>> isn't really free, is it?
>>
>>
>> Please do not confuse the term 'free' in 'free software' with 'gratis'.
>>
>> 'Gratis', i.e. 'lacking a monetary price tag' is something *very*
>> different from the meaning of 'free' in 'free software'.

Sure, but where does the infection thing come in? Suppose RMS publishes 
a new library call add-42, whose api is add-42, inputs n, outputs n+42, 
source left as an exercise, and Kenny decides he can use it, it is 
great. Now if Kenny uses it in his commercial software, add-42 does not 
somehow become less free to ride 'neath the starry skies above, don't 
fence me in. But RMS wants Kenny's hide. Nothing Kenny wrote derived 
from add-42, but RMS wants it all. Kenny happened to solve the traveling 
salesman problem and protein-folding and passed the fricking Turing test 
by using add-42 wherever he needed 42 added to a number, and  RMS wants 
credit and ownership and control of it all. He and his license  shall 
now dictate access and use of all that code. The handcuffs are on, and 
they are inscribed "free".

No wonder the GPL has gone nowhere. Freely. RMS reasonably wanted that 
add-42 not get co-opted, but that in no way necessitated the land grab 
that is GPL. The GPL is a gratuitous reach only fancifully justified by 
wanting to ensure that open source remain open. So this has nothing to 
do with freedom in /any/ sense of the word, it has to do with a 
political agenda opposed to the idea of private property.

kzo



-- 
http://www.theoryyalgebra.com/

"We are what we pretend to be." -Kurt Vonnegut


From zzbbaadd at aol.com  Tue Sep 18 21:09:26 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Tue, 18 Sep 2007 18:09:26 -0700
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
In-Reply-To: <mailman.303.1188779927.28954.python-list@python.org>
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<dea92f560709021735l2c72d53ew94410fcb33b9b50b@mail.gmail.com>
	<mailman.303.1188779927.28954.python-list@python.org>
Message-ID: <1190164166.378500.155990@o80g2000hse.googlegroups.com>

On Sep 2, 5:38 pm, "Eduardo O. Padoan" <eduardo.pad... at gmail.com>
wrote:
> > No.http://www.artima.com/weblogs/viewpost.jsp?thread=211430
>
> Ops, I meant:http://www.artima.com/forums/threaded.jsp?forum=106&thread=211200
>
> --http://www.advogato.org/person/eopadoan/
> Bookmarks:http://del.icio.us/edcrypt

"No. We're not changing the CPython implementation much. Getting rid
of the GIL would be a massive rewrite of the interpreter because all
the internal data structures (and the reference counting operations)
would have to be made thread-safe. This was tried once before (in the
late '90s by Greg Stein) and the resulting interpreter ran twice as
slow."

How much faster/slower would Greg Stein's code be on today's
processors versus CPython running on the processors of the late
1990's? And if you decide to answer, please add a true/false response
to this statement - "CPython in the late 1990's ran too slow".



From exhuma at gmail.com  Wed Sep 19 09:50:17 2007
From: exhuma at gmail.com (exhuma.twn)
Date: Wed, 19 Sep 2007 06:50:17 -0700
Subject: Keeping a database connection with a Singleton?
In-Reply-To: <fcr969$c8g$02$1@news.t-online.com>
References: <1190208406.041953.115580@g4g2000hsf.googlegroups.com>
	<fcr969$c8g$02$1@news.t-online.com>
Message-ID: <1190209817.842068.280270@w3g2000hsg.googlegroups.com>

On Sep 19, 3:45 pm, Peter Otten <__pete... at web.de> wrote:
> exhuma.twn wrote:
[...]
>
> By the way, there is a pythonic (near) singleton: the module. So if you go
> with option 2, just move the connection setup into a separate module that
> you can import into client code.
>
> Peter

You say "(near)" singleton. What's the difference then?




From redtiger84 at googlemail.com  Thu Sep 13 04:08:11 2007
From: redtiger84 at googlemail.com (Christoph Krammer)
Date: Thu, 13 Sep 2007 08:08:11 -0000
Subject: MemoryError on reading mbox file
In-Reply-To: <1189607986.628841.215930@50g2000hsm.googlegroups.com>
References: <1189589259.662667.149730@w3g2000hsg.googlegroups.com>
	<1189607986.628841.215930@50g2000hsm.googlegroups.com>
Message-ID: <1189670891.166330.256120@19g2000hsx.googlegroups.com>

On 12 Sep., 16:39, Istvan Albert <istvan.alb... at gmail.com> wrote:
> This line reads an entire message into memory as a string. Is it
> possible that you have a huge email in there (hundreds of MB) with
> some attachment encoded as text?

No, the largest single message with the mbox is about 100KB large.


> For now I would recommend that you split your mbox file into several
> smaller ones. (I think all you need is to split at the To: fields) and
> run your script on these individual files.

I get it to work with splitting the mbox file into single files, one
for each message, with the git-mailsplit tool, that is included in the
gitk package. This solved the problem for now.

Thanks for all your help.

Christoph




From deets at nospam.web.de  Sun Sep 23 14:19:43 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 23 Sep 2007 20:19:43 +0200
Subject: building a GUI
In-Reply-To: <mailman.945.1190571251.2658.python-list@python.org>
References: <1190557293.266783.251480@y42g2000hsy.googlegroups.com>	<mailman.940.1190560838.2658.python-list@python.org>	<pan.2007.09.23.17.41.52@gmail.com>
	<mailman.945.1190571251.2658.python-list@python.org>
Message-ID: <5lnp2rF90pqqU1@mid.uni-berlin.de>

stef mientki schrieb:
> Thomas Dybdahl Ahle wrote:
>> Den Sun, 23 Sep 2007 17:28:38 +0200 skrev stef mientki:
>>  
>>> yadin wrote:
>>>
>>>    
>>>> if i were up to make a GUI chich are the advantages of choosing python
>>>> over matlab or java?
>>>>
>>>>       
>>> The best is Delphi,
>>> second is VB,
>>>     
>>
>> That sounds mostly like a personal preference :)
>>
>>   
> Well I prefer Python ( because of it's OS-independancy and it's open 
> source),
> but Python is really (still) much worse for GUI designs.
> Just compare some parameters like:
> - ease of use
> - speed of development
> - support of features
> - availability of libraries
> - documentation

Sounds like PyQt for me. Best GUI-designer I know, tremendous speed in 
development, giant sized lib that does all kinds of stuff & is 
brilliantly designed + professional grade docus.

Diez


From fabiofz at gmail.com  Thu Sep 13 07:08:39 2007
From: fabiofz at gmail.com (Fabio Zadrozny)
Date: Thu, 13 Sep 2007 08:08:39 -0300
Subject: Setting stdout encoding
In-Reply-To: <op.tykwpjijx6zn5v@gabriel2.softlabbsas.com.ar>
References: <1189416350.069995.220250@w3g2000hsg.googlegroups.com>
	<cfb578b20709100602i4146f5c0hd2a1343f644a90f@mail.gmail.com>
	<op.tygmb9nux6zn5v@gabriel2.softlabbsas.com.ar>
	<cfb578b20709110358n5801c19ie21d95ef1161e4c0@mail.gmail.com>
	<op.tykwpjijx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <cfb578b20709130408u2bf27cabl72d230f5252480a6@mail.gmail.com>

>
> But I don't think it's a good idea. Changing the default encoding will
> change it for *all* scripts, *all* users, *all* objects. And AFAIK you
> have trouble ONLY with sys.std* - one should fix those objects, not mess
> with a global configuration.
>

Makes sense... Do you think that creating a new object, setting it as
sys.stdout and overriding its write() method to check for a unicode string
to do original_stdout.write(unicode_str.encode(my_encoding)) would do it?
(the ctypes version is not really an option as it is not available on lots
of installs -- although I can try to use it if it's available, but it can't
be the only solution).

Thanks,

Fabio
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From sabrina.maffioli at net2000.ch  Mon Sep 24 06:34:06 2007
From: sabrina.maffioli at net2000.ch (sabrina.maffioli)
Date: Mon, 24 Sep 2007 12:34:06 +0200
Subject: KeyError: ... updated type, in planet
Message-ID: <000501c7fe96$6ff64af0$6400a8c0@pcarrcom>

An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070924/f3be12e4/attachment.html>

From david.golden at oceanfree.net  Sat Sep 29 08:24:31 2007
From: david.golden at oceanfree.net (David Golden)
Date: Sat, 29 Sep 2007 13:24:31 +0100
Subject: The Modernization of Emacs: terminology buffer and keybinding
References: <1182093200.598418.218620@e9g2000prf.googlegroups.com>
	<1182272495.990807.99110@a26g2000pre.googlegroups.com>
	<87tzt3ihev.fsf@kobe.laptop> <m31wg6lre9.fsf@borud.not>
	<1182370216.961241.6960@n60g2000hse.googlegroups.com>
	<85zm2ufjpb.fsf@lola.goethe.zz>
	<1182372592.803332.288260@u2g2000hsc.googlegroups.com>
	<m3myyt47nq.fsf@latakia.dyndns.org>
	<1182549094.366282.286740@m37g2000prh.googlegroups.com>
	<87bqf7fwmg.fsf@telesippa.clsnet.nl>
	<1182553682.197778.138500@g37g2000prf.googlegroups.com>
	<873b0fhokz.fsf@kobe.laptop> <13frd6vtarbee75@corp.supernews.com>
	<pmnLi.1684$hP.1048@newsfe12.lga>
Message-ID: <TtrLi.22337$j7.422818@news.indigo.ie>

Ken Tilton wrote:


> No wonder the GPL has gone nowhere.

Bwaahahahaha. Keep smokin' that crack, there.

> Freely. RMS reasonably wanted that 
> add-42 not get co-opted, but that in no way necessitated the land grab
> that is GPL.

You (and probably KMP) are presuming the validity of copyright monopoly
law  think.  Others do not do that. Whenever you claim a copyright
monopoly, and enforce that monopoly, you're abridging others freedom. 
It might currently be legal to do so, but "legal" and "right" are
different things.

So your beef is not _really_ with the GPL - it derives all its power
from copyright law.  The GPL is really only valid while copyright law
is: If copyright law is reduced in power and reach, the GPL is too.  So
if you don't like the GPL, push for weakened copyright law.  Heh.
Supporters of copyright monopoly law *really* don't like this
double-bind of the GPL, of course, but that's by design.

Of course, the FSF are a bunch of moderates, these days you can support
your local Pirate Party, more information at
http://www.pp-international.net/


From wizzardx at gmail.com  Thu Sep 20 15:17:09 2007
From: wizzardx at gmail.com (David)
Date: Thu, 20 Sep 2007 21:17:09 +0200
Subject: Saving parameters between Python applications?
In-Reply-To: <1189969538.830532.98840@g4g2000hsf.googlegroups.com>
References: <1189969538.830532.98840@g4g2000hsf.googlegroups.com>
Message-ID: <18c1e6480709201217s3c2620acl1cce88aeede5364f@mail.gmail.com>

On 9/16/07, Stodge <stodge at gmail.com> wrote:
> I'm trying to do the following. I have a Python application that is
> run:
>
> python app1.py --location=c:\test1
>
> What I want to do is save the location parameter, so I can then do (in
> the same window):
>
> python app2.py
>
> And have app2.py automatically have access to the value of "location".
>
> Now, the difficult part is, that in another window I want to do:
>
> python app1.py --location=c:\test2
> python app2.py
>
> And have app2.py automatically get c:\test2 as the location. So the
> two windows (consoles) are isolated from each other.
>
> I thought I could use os.environ, but that doesn't save the variable
> for applications that are run afterwards in the same window.

Use a value based on your current tty. I don't know how to get this
value in Python but you could just shell 'tty' and grab the output.

Or, to get your parent process's pid, use os.getppid().

Then, use a temporary file whose name is based on the above info.


From panzhengzheng at gmail.com  Sun Sep 30 15:10:38 2007
From: panzhengzheng at gmail.com (Zhengzheng Pan)
Date: Sun, 30 Sep 2007 19:10:38 -0000
Subject: [Python] Matrix convergence
Message-ID: <1191179438.736054.322700@o80g2000hse.googlegroups.com>

Hi all,

I'm trying to check whether a (stochastic/transition) matrix
converges, i.e. a function/method that will return True if the input
matrix sequence shows convergence and False otherwise. The background
is a Markov progress, so the special thing about the transition matrix
is the values of elements in each row add up to be 1. Fail to find any
relevant build-in methods in Python...

Currently the standard theorem on convergence in Markov chain
literature is involved with the properties of aperiodic and
connectivity, which I'm not able to implement with Python either...
Therefore I'm actually also looking for alternative conditions to
check for convergence, and am willing to sacrifice a little bit of
precision.

If you have any ideas/suggestions on how to examine the convergence of
a matrix in general or specifically about this kind of matrices, and
are willing to share, that'd be really great.

Thx!

Zz



From ldo at geek-central.gen.new_zealand  Sun Sep 23 22:57:58 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 24 Sep 2007 14:57:58 +1200
Subject: subprocess -popen - reading stdout from child - hangs
References: <1190518129.356844.242710@19g2000hsx.googlegroups.com>
	<1190521003.928634.48900@d55g2000hsg.googlegroups.com>
Message-ID: <fd793m$dfc$1@lust.ihug.co.nz>

In message <1190521003.928634.48900 at d55g2000hsg.googlegroups.com>,
gregpinero at gmail.com wrote:

> Well, using this subclass of subprocess.Popen fixes the problem
> (http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/440554)
> 
> I don't understand how it works though.  Would anyone mind
> explaining?  I'm thinking there's something fundamental about Unix
> processes I'm not understanding.

The "select" calls are checking that the subprocess is ready to read before
writing to its stdin, or that it has something to write before reading from
its stdout.

The O_NONBLOCK fcntl simply says not to wait if there is nothing more to be
read, just return what was already read.


From canadaimmigrationlaw at yahoo.ca  Sat Sep 15 17:47:11 2007
From: canadaimmigrationlaw at yahoo.ca (canadaimmigrationlaw at yahoo.ca)
Date: Sat, 15 Sep 2007 14:47:11 -0700
Subject: Patent application
Message-ID: <1189892831.714339.41610@y42g2000hsy.googlegroups.com>

US patent application services:

http://www.pinskylaw.ca/Practice/OntarioTorontoLawyers/business_patents.htm



From deets at nospam.web.de  Sat Sep 22 13:54:08 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 22 Sep 2007 19:54:08 +0200
Subject: Video from image
In-Reply-To: <1190482152.556818.19300@k79g2000hse.googlegroups.com>
References: <1190482152.556818.19300@k79g2000hse.googlegroups.com>
Message-ID: <5ll36sF7k6d3U1@mid.uni-berlin.de>

azrael schrieb:
> I'd like to ask you if you know a module that makes it possible to
> create a number of images and than to use them as frames and finaly
> export them to a video file

pymedia

Diez


From neilscad at hotmail.com  Sat Sep 29 06:52:06 2007
From: neilscad at hotmail.com (neil)
Date: Sat, 29 Sep 2007 22:52:06 +1200
Subject: python 2.5 and 3gb switch
References: <fdkan6$ne0$1@aioe.org> <fdkfqb$qr$1@daisy.noc.ucla.edu>
	<fdkq8g$vj2$1@aioe.org> <46FDF800.5030504@v.loewis.de>
	<fdl5lg$una$1@aioe.org> <46fe1e79$0$2816$9b622d9e@news.freenet.de>
Message-ID: <fdlaoo$dt0$1@aioe.org>

thanks for your interest
...well I am quoting what it says -
it gives me some recent lines executed in the console window and then 
'memerror'
possibly Blenders python API is slightly different from python itself
I see there is a python exception MemoryError...
most likely this is the equivalent and also using google I see other 
references to MemError or memerror

I'll have to get back here tomorrow its late now
I will get the exact statement for you 




From nospam.please at alum.com  Wed Sep  5 03:41:08 2007
From: nospam.please at alum.com (n o s p a m p l e a s e)
Date: Wed, 05 Sep 2007 00:41:08 -0700
Subject: Calling a matlab script from python
Message-ID: <1188978068.544030.158010@19g2000hsx.googlegroups.com>

Suppose I have a matlab script mymatlab.m. How can I call this script
from a python script?

Thanx/NSP



From paul.hankin at gmail.com  Thu Sep 27 04:28:53 2007
From: paul.hankin at gmail.com (Paul Hankin)
Date: Thu, 27 Sep 2007 08:28:53 -0000
Subject: Using closures and partial functions to eliminate redundant code
In-Reply-To: <N9EKi.37131$RX.19410@newssvr11.news.prodigy.net>
References: <N9EKi.37131$RX.19410@newssvr11.news.prodigy.net>
Message-ID: <1190881733.282234.99660@n39g2000hsh.googlegroups.com>

On Sep 27, 3:01 am, Matthew Wilson <m... at tplus1.com> wrote:
> I wrote some code to create a user and update a user on a remote box by
> sending emails to that remote box.  When I was done, I realized that my
> create_user function and my update_user function were effectively
> identical except for different docstrings and a single different value
> inside:
>
>     ### VERSION ONE
>
>     def create_user(username, userpassword, useremail):
>         "Send an email that will create a user in the remote system."
>
>         # Build email
>         email_body = """
>     USERNAME = %s
>     USERPASSWORD = %s
>     USEREMAIL = %s
>     """ % (username, userpassword, useremail)
>
>         # send it.
>         send_email(subject="CREATE", body=email_body)
>
>     def update_user(username, userpassword, useremail):
>         "Send an email that will update a user's password in the remote system."
>
>         # Build email
>         email_body = """
>     USERNAME = %s
>     USERPASSWORD = %s
>     USEREMAIL = %s
>     """ % (username, userpassword, useremail)
>
>         # send it.
>         send_email(subject="UPDATE", body=email_body)

If you don't mind what order the lines of your email appear in, you
might get more reuse out of something like this. As other's have said
partial isn't needed here.

def send_command_email(subject, **kwargs):
    """Send an email to the with the given subject, and lines of the
       body of the form A = B for each keyword argument."""
    email_body = '\n'.join('%s = %s' % (k, kwargs[k]) for k in kwargs)
    send_email(subject=subject, body='\n' + email_body + '\n'

def create_user(name, password, email):
    "Create a user by sending an email to the server"
    send_command_email('CREATE', USERNAME=name,
        USERPASSWORD=password, USEREMAIL=email)

def update_user(name, password, email):
    "Update a user's details by sending an email to the server"
    send_command_email('UPDATE', USERNAME=name,
        USERPASSWORD=password, USEREMAIL=email)

--
Paul Hankin



From cjw at sympatico.ca  Sun Sep 23 19:15:45 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Sun, 23 Sep 2007 19:15:45 -0400
Subject: Writing Object Data to Disk
In-Reply-To: <1190461394.6587.4.camel@ubuntu-laptop>
References: <mailman.3168.1190445604.2656.python-list@python.org>
	<1190461394.6587.4.camel@ubuntu-laptop>
Message-ID: <fd6s3u$6a6$1@sea.gmane.org>

Amit Kumar Saha wrote:

> Actually, language independence is really not a consideration here. I am
> happy at having it tied to Python :-)
> 
> BTW, do we have something like array of objects here? 
In numpy, one can have a multi-dimensional array of objects.  It would 
be good to have this notion implemented in Python itself.

Colin W.



From darien.watkins at gmail.com  Mon Sep 10 22:52:10 2007
From: darien.watkins at gmail.com (darien.watkins at gmail.com)
Date: Tue, 11 Sep 2007 02:52:10 -0000
Subject: Python Database Apps
Message-ID: <1189479130.905136.196820@r34g2000hsd.googlegroups.com>

Kindof a poll, kindof curiosity...

What is your favorite python - database combination?  I'm looking to
make an app that has a local DB and a server side DB.  I'm looking at
python and sqlite local side and sql server side.

Any suggestions????

Darien



From pitonero at gmail.com  Wed Sep  5 10:27:39 2007
From: pitonero at gmail.com (El Pitonero)
Date: Wed, 05 Sep 2007 07:27:39 -0700
Subject: So what exactly is a complex number?
In-Reply-To: <mailman.266.1188644067.28954.python-list@python.org>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>
	<mailman.212.1188576194.28954.python-list@python.org>
	<451mq4-les.ln1@ozzie.tundraware.com>
	<mailman.266.1188644067.28954.python-list@python.org>
Message-ID: <1189002459.001229.116700@d55g2000hsg.googlegroups.com>

On Sep 1, 3:54 am, Grzegorz S odkowicz <jerg... at wp.pl> wrote:
>
> You're mixing definition with application. You didn't say a word about
> what complex numbers are, not a word about the imaginary unit, where
> does it come from, why is it 'imaginary' etc.  
> ...
> I'd also like to see a three-dimensional vector
> represented by a complex number.

Well, maybe you'd like to learn something about Geometric Algebra. :)

I am a bit surprised that today, September 2007, in a thread about
complex numbers, no one has mentioned about geometric algebra. There
is an older way of looking at complex numbers: the imaginary unit as
square root of -1. And then there is a new way of looking at complex
numbers: as the multi-vector space associated to the two-dimensional
vector space. So, yes, complex numbers are a bit like vectors, but
more precisely, they are "multi-vectors", where the first component
(the real part) is a "scalar", and the second part (the imaginary
part) is an "area".

This may all be just paraphrasing. But it gets more interesting when
you go to higher dimensions. You'd like to know whether there are
extension of complex numbers when you go to three dimensional space,
and the answer is definitely YES! But the new multivectors live in 8
dimensional space. Geometric product not only make this possible, but
this product is invertible. Moreover, complicated equations in
electromagnatism in physics (Maxwell's equations) can be written in a
single line when you use geometric algebra. When you see some of the
features of geometric algebra, you will realize that complex number
are but a small part of it. (There is a paper with the title
"Imaginary numbers are not real...", I guess the title says it all.)

Anyway, there are always many ways of looking at the same thing.
Geometric algebra is one. Who knows what tomorrow brings? But as of
today, I'd say that it's better to teach school children about
geometric algebra, instead of the present way of introducing imaginary
unit. Just my opinion.



From agupta0318 at gmail.com  Wed Sep 12 10:28:15 2007
From: agupta0318 at gmail.com (agupta0318 at gmail.com)
Date: Wed, 12 Sep 2007 14:28:15 -0000
Subject: Dynamically removing methods in new-style classes
Message-ID: <1189607295.676704.215210@r34g2000hsd.googlegroups.com>

I am trying unsuccessfully to remove some methods from an instance,
based on values passed in to the constructor as in the following
example:

#===============================================================
class A(object):

	def __init__(self, id):
		self._id = id
		return

	def clean(self):
		if (self._id == 1):
			del self.test1
		elif (self._id == 2):
			del self.test2
			pass
		return

	def test1(self):
		print "in test1"
		return

	def test2(self):
		print "in test2"
		return

#=============================================================================
if (__name__ == '__main__'):
	try:
		a = A(1)
		a.clean()
		a.test2()
		a.test1()
	except AttributeError, exc:
		import traceback
		traceback.print_exc()
		pass

#==================================================================
I get the following error:
Traceback (most recent call last):
  File "DynamicMethods.py", line 30, in ?
    a.clean()
  File "DynamicMethods.py", line 11, in clean
    del self.test1
AttributeError: test1

With the older python classes I could have done:
    self.__class__.__dict__[''test1"] to achieve the desired result.

I appreciate any help you could provide with this.

Thanks.

Amit Gupta



From bdesth.quelquechose at free.quelquepart.fr  Mon Sep  3 10:27:58 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 03 Sep 2007 16:27:58 +0200
Subject: Printing lists in columns
In-Reply-To: <1188917550.261894.84010@k79g2000hse.googlegroups.com>
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<mailman.315.1188810174.28954.python-list@python.org>
	<46dbd11e$0$6228$426a74cc@news.free.fr>
	<mailman.317.1188812089.28954.python-list@python.org>
	<1188816626.021956.281040@22g2000hsm.googlegroups.com>
	<5k2cjmF1r2aiU1@mid.uni-berlin.de>
	<1188836008.656284.76160@o80g2000hse.googlegroups.com>
	<46dc6f49$0$6207$426a34cc@news.free.fr>
	<1188900397.459760.259580@k79g2000hse.googlegroups.com>
	<slrnfdqe3t.i4p.hat@se-162.se.wtb.tue.nl>
	<Xns99A17FAC2587duncanbooth@127.0.0.1>
	<1188906767.737741.267350@19g2000hsx.googlegroups.com>
	<Xns99A18F8C528BCduncanbooth@127.0.0.1>
	<1188913394.763871.218660@d55g2000hsg.googlegroups.com>
	<46dd69b1$0$24998$426a74cc@news.free.fr>
	<1188917550.261894.84010@k79g2000hse.googlegroups.com>
Message-ID: <46ddbb26$0$18672$426a74cc@news.free.fr>

cjt22 at bath.ac.uk a ?crit :
> On Sep 4, 3:20 pm, Bruno Desthuilliers <bruno.
> 42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> 
>>cj... at bath.ac.uk a ?crit :
>>(snip)
>>
>>
>>>Thanks guys
>>
>>>I have a list of lists such as
>>> a = ["1" , "2"]  b = ["4", "5", "6"]  c = ["7",8", "9"]
>>>Stored in another list: d = [a,b,c]
>>
>>>I know this makes me sound very stupid but how would I specify
>>>in the parameter the inner lists without having to write them all out
>>>such as:
>>
>>>for row in izip_longest(d[0], d[1], d[2], fillvalue='*'):
>>>    print ', '.join(row)
>>
>>>i.e. How could I do the following if I didn't know how many list of
>>>lists I had.
>>
>>for row in izip_longest(*d, fillvalue='*'):
>>     print ', '.join(row)
>>
>>HTH
> 
> 
> I thought that but when I tried it I recieved a
> "Syntax Error: Invalid Syntax"
> with a ^ pointing to fillvalue :S
> 
Yes, sorry - answered too fast, which is a cardinal sin. The 
func(*sequence) is of course the right answer, but indeed you cannot 
directly pass a keyword arg after it - you must either pass the keyword 
args first:

   izip_longest(fillvalue='*', *d)

or wrap it in a dict and use the ** notation:

   izip_longest(*d, **dict(fillvalue='*'))

In this case, the second solution only makes sens if you already have 
this dict for other reasons.


From zzbbaadd at aol.com  Mon Sep 17 14:29:17 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Mon, 17 Sep 2007 11:29:17 -0700
Subject: Python 3K or Python 2.9?
In-Reply-To: <mailman.645.1190026962.2658.python-list@python.org>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<uir6ctto7.fsf@yahoo.com>
	<1190013827.107324.111820@w3g2000hsg.googlegroups.com>
	<mailman.645.1190026962.2658.python-list@python.org>
Message-ID: <1190053757.091035.221570@22g2000hsm.googlegroups.com>

On Sep 17, 4:02 am, Steve Holden <st... at holdenweb.com> wrote:
> TheFlyingDutchman wrote:
> >> The other half of the confusion is cleared up by considering that
> >> Python methods are ordinary functions that don't magically "know" in
> >> which "class" context they are executing: they must be told via the
> >> first parameter.
>
> > They can be told all they want by the compiler/runtime - implicitly -
> > under-the-covers, out-of-sight.
>
> I wish you would keep these deep insightful comments to yourself. Your
> knowledge of the interpreter internals appears to be based on
> examination by crystal ball.

I am not talking about the way it does it, but rather, the way it
could do it or... could have done it. That requires no knowledge of
how the interpreter currently does it unless I am proposing something
that no interpreter in the world could ever do.

>
> You conveniently ignore the fact that the situation described by David
> Trudgett (and, by the way, your quoting with no attributions is also
> becoming tiresome very quickly) is a *design choice*, not a mistake.
> It's done precisely to make an explicit reference to the instance
> available to methods.
>


For your own information, supercilious references to the interpreter
internals become tiresome quickly.

I made a complaint about a small design choice. I also made it in the
past tense at least once ("should have done it") and explicitly
expressed that I knew it wasn't going to happen. Python was created
based on a language that was designed to make it easy to use by
beginners. Doing so made it a clean and clear language. My preference
is for everything to be as clean and clear as possible. If I didn't
I'd never have bothered with Python since Perl is much more popular
among programmers I have come across.

Jury-rigging new features is going to make the elite happy but very
likely will be viewed differently by us average programmers.

> change other aspects of the language, such as the ability to graft
> functions into instances and classes as methods.

Those are elite-type features that make code harder to understand by
average programmers and probably the elite as well. To paraphrase
someone "He thought he'd solve the problem by grafting functions into
classes and grafting classes into methods. Then he had two problems".



From tim at tdw.net  Fri Sep 14 06:35:47 2007
From: tim at tdw.net (Tim Williams)
Date: Fri, 14 Sep 2007 11:35:47 +0100
Subject: smtp debugging methods
In-Reply-To: <Pine.WNT.4.64.0709140015140.888@frna_yncgbc>
References: <Pine.WNT.4.64.0709140015140.888@frna_yncgbc>
Message-ID: <9afea2ac0709140335k38c5a112g61e8a5cd2adf4473@mail.gmail.com>

On 14/09/2007, Sean Nakasone <seannakasone at yahoo.com> wrote:
> I'm having trouble with sending smtp mail.  It's hanging after the
> smtplib.SMTP() line. It doesn't works from home but not from work.  What's
> the best way to debug this?
>
> # Here's my script
> import smtplib
> msg = "Subject: Hello\n\nThis is the\nbody of the message."
> server = smtplib.SMTP("smtp.gmail.com",465)
>   # "Connection refused" normally means there is no server listening for
>   # connections on the specified IP/port-combination.
>   # use netstat -an to view connections.
> server.set_debuglevel(1)
> server.ehlo()
> server.starttls()
> server.ehlo()
> # !!! set the password
> server.login("myuser", "mypass")
> server.sendmail("...
>
> # Here's the error
> >>> server = smtplib.SMTP("smtp.gmail.com",465)
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "/usr/lib/python2.4/smtplib.py", line 241, in __init__
>     (code, msg) = self.connect(host, port)
>   File "/usr/lib/python2.4/smtplib.py", line 304, in connect
>     (code, msg) = self.getreply()
>   File "/usr/lib/python2.4/smtplib.py", line 345, in getreply
>     line = self.file.readline()
>   File "/usr/lib/python2.4/socket.py", line 340, in readline
>     data = self._sock.recv(self._rbufsize)
> socket.error: (113, 'Software caused connection abort')

There is no SMTP service on port 465 , its some other "service" or the
smtp server is in trouble,   try it with port 587 instead.

HTH :)


From bdesth.quelquechose at free.quelquepart.fr  Wed Sep 19 15:34:29 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 19 Sep 2007 21:34:29 +0200
Subject: cannot create my own dict
In-Reply-To: <46f17743$0$12915$426a34cc@news.free.fr>
References: <slrnff260r.43o.hat@se-162.se.wtb.tue.nl>
	<46f17743$0$12915$426a34cc@news.free.fr>
Message-ID: <46f179ec$0$12878$426a34cc@news.free.fr>

Bruno Desthuilliers a ?crit :
> A.T.Hofkamp a ?crit :
> 
(snip)

>> # Below is produced with
>> # print '\n'.join(['        self.%s = self.mydict.%s' % (v,v)
>> #                                         for v in dir(dict)])
>> # commented-out functions done by hand
>> #
>>         #self.__class__ = self.mydict.__class__
>>         self.__cmp__ = self.mydict.__cmp__
>>         self.__contains__ = self.mydict.__contains__
> 
> 
> (snip lots of useless code)
> 
> May I suggest that you learn to use __getattr__ and __setattr__ ?-)

Mmmm... Should have tested before posting this. Please ignore this 
remark, looks like __getattr__ is not called for __magic__ methods. Doh :(



From piet at cs.uu.nl  Thu Sep 13 04:36:47 2007
From: piet at cs.uu.nl (Piet van Oostrum)
Date: Thu, 13 Sep 2007 10:36:47 +0200
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<87sl5j5r34.fsf@benfinney.id.au>
	<1189646281.569796.267940@d55g2000hsg.googlegroups.com>
	<87ir6f5mrq.fsf@benfinney.id.au>
Message-ID: <m2ps0nj71c.fsf@koshka.cs.uu.nl>

>>>>> Ben Finney <bignose+hates-spam at benfinney.id.au> (BF) wrote:

>BF> The latter two statements are equivalent. The 'instance.method(args)'
>BF> syntax is just sugar for 'Class.method(instance, args)'.

It is more than just syntactic sugar because the Class is derived from the
instance at runtime. 
-- 
Piet van Oostrum <piet at cs.uu.nl>
URL: http://www.cs.uu.nl/~piet [PGP 8DAE142BE17999C4]
Private email: piet at vanoostrum.org


From sjmachin at lexicon.net  Sat Sep 22 07:18:22 2007
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 22 Sep 2007 21:18:22 +1000
Subject: Writing Object Data to Disk
In-Reply-To: <5lk4qnF8iosiU1@mid.individual.net>
References: <mailman.914.1190444082.2658.python-list@python.org>
	<5lk4qnF8iosiU1@mid.individual.net>
Message-ID: <46f4f9fe$1@news.eftel.com.au>

On 22/09/2007 7:16 PM, Bjoern Schliessmann wrote:
> Amit Kumar Saha wrote:
>> I have a Python class with data members, say:
>>
>> class Foo:
>>     def __init__(self):
>>
>>         self.a=7
>>         self.b[]={1,3,4}
>                 ^^
> This is invalid syntax.

So are the braces.



From rcdailey at gmail.com  Tue Sep  4 14:30:39 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Tue, 4 Sep 2007 13:30:39 -0500
Subject: Rendering API for python?
In-Reply-To: <496954360709041126l2c1d4a3cg821b263acb9fa9c2@mail.gmail.com>
References: <496954360709041126l2c1d4a3cg821b263acb9fa9c2@mail.gmail.com>
Message-ID: <496954360709041130t2c32c0a9l737726db1a383e57@mail.gmail.com>

Well, I guess I wrote too soon. I found this:
http://matplotlib.sourceforge.net/

I'm going to try it out and see if it is what I'm looking for, however I'm
pretty confident!

On 9/4/07, Robert Dailey <rcdailey at gmail.com> wrote:
>
> Hi,
>
> I'm developing a quick python script to test an algorithm of mine. I would
> like to be able to plot the algorithm results to a diagram (much like you
> can do in Matlab). I was wondering if there's an API around that would allow
> me to quickly do this? Perhaps some sort of rendering API or plotting API
> for python? Any help is greatly appreciated. Thanks.
>
> PS: I'm using Python on Windows.
>
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From eduardo.padoan at gmail.com  Sun Sep  2 20:38:42 2007
From: eduardo.padoan at gmail.com (Eduardo O. Padoan)
Date: Sun, 2 Sep 2007 21:38:42 -0300
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
In-Reply-To: <dea92f560709021735l2c72d53ew94410fcb33b9b50b@mail.gmail.com>
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<dea92f560709021735l2c72d53ew94410fcb33b9b50b@mail.gmail.com>
Message-ID: <dea92f560709021738n270649e4j267edac4d11483ff@mail.gmail.com>

> No. http://www.artima.com/weblogs/viewpost.jsp?thread=211430

Ops, I meant:
http://www.artima.com/forums/threaded.jsp?forum=106&thread=211200


-- 
http://www.advogato.org/person/eopadoan/
Bookmarks: http://del.icio.us/edcrypt


From steve at holdenweb.com  Tue Sep 11 14:48:47 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 11 Sep 2007 14:48:47 -0400
Subject: Python 2 releases after 2.6
In-Reply-To: <1189522031.823544.111670@k79g2000hse.googlegroups.com>
References: <1189522031.823544.111670@k79g2000hse.googlegroups.com>
Message-ID: <fc6nue$2ua$2@sea.gmane.org>

slinkp wrote:
> This seems to be a bit of a FAQ (at least among worried Zope
> developers  :-) ...
> What  are the plans for Python 2 releases after Python 2.6 / Python 3
> are released?
> 
> First, in the 2006 State of Python, Guido said:
> 
> """
> # 2.7: likely; may contain some 3.0 backports
> # 2.9 is as far as we'll go (running out of digits :-)
> """
> 
> Then there's PEP 3000, which says:
> """
> I expect that there will be parallel Python 2.x and 3.x releases for
> some time; the Python 2.x releases will continue for a longer time
> than the traditional 2.x.y bugfix releases. Typically, we stop
> releasing bugfix versions for 2.x once version 2.(x+1) has been
> released. But I expect there to be at least one or two new 2.x
> releases even after 3.0 (final) has been released, probably well into
> 3.1 or 3.2. This will to some extent depend on community demand for
> continued 2.x support, acceptance and stability of 3.0, and volunteer
> stamina.
> """
> 
> Has any of that changed (insofar as anyone can predict the future of
> course)?
> 
Well, since Tim Peters isn't around to channel Guido, let me just say 
"no". The above remains the current intention. 2.6 is intended to 
backport as many as possible of 3.0's new features.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From paul at boddie.org.uk  Sun Sep 16 17:57:58 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Sun, 16 Sep 2007 14:57:58 -0700
Subject: ANNOUNCE: pprocess 0.3
Message-ID: <mailman.626.1189981689.2658.python-announce-list@python.org>

Announcing the release of pprocess 0.3 (previously known as parallel/
pprocess), available from...

http://www.python.org/pypi/pprocess/0.3

Note that only POSIX-like platforms are supported in this release,
although improvements in portability and all other areas are welcome.

What is it?
-----------

The pprocess module provides several mechanisms for running Python
code concurrently in several processes. On systems with multiple CPUs
or multicore CPUs, processes should take advantage of as many CPUs or
cores as the operating system permits.

Several different abstractions are supported by the module, including
channels (and communicating sequential processes), queues and a
parallel map function. The module gives developers a certain amount of
flexibility in developing new abstractions, and a motivation behind
the development of the module was, in fact, to discover which
abstractions are most convenient when writing parallel-aware programs.

Tutorial
--------

In order to get a feel for the abstractions and mechanisms provided by
the module, a tutorial has been made available; it illustrates the
process of converting certain kinds of sequential programs into
parallel programs:

http://www.boddie.org.uk/python/pprocess/tutorial.html

Future Work
-----------

The module has been tested with non-trivial programs (see the PyGmy
raytracer example in the distribution), but performance results have
been varied: pprocess ensures the utilisation of many processors but
could arguably show better scalability. It is envisaged that the focus
for future releases involve improvements to the interprocess
communications mechanisms employed, along with an investigation into
more effective ways of distributing computations in specific programs.

In the context of recent discussions about Python concurrency support
[1], this module is intended as a demonstrator for various API
conveniences, with an aim of encouraging standardisation and
potentially the eventual standard library adoption of a useful
parallel processing module.

[1] http://jessenoller.com/2007/09/10/interesting-read-tear-down-that-gil/



From jfine at pytex.org  Tue Sep 18 19:30:57 2007
From: jfine at pytex.org (Jonathan Fine)
Date: Wed, 19 Sep 2007 00:30:57 +0100
Subject: Metatest 0.1.0
References: <mailman.721.1190126947.2658.python-announce-list@python.org>
	<1190130384.753009.142150@i13g2000prf.googlegroups.com>
	<46F006D5.3060609@pytex.org>
	<1190147863.968759.229330@g4g2000hsf.googlegroups.com>
Message-ID: <46F05FB1.7070807@pytex.org>

Kay Schluehr wrote:

>>Sounds interesting.  Is this code, or examples of its use, available?
> 
> 
> Sure, it's part of EasyExtend. See also www.fiber-space.de

OK.  So the ULR for the documentation of consoletest is:
http://www.fiber-space.de/EasyExtend/doc/consoletest/consoletest.html

It has a recorder and a player.  As does Metatest (developed later and 
independently).  I think that is a good concept.  Other frameworks use
   def test_something(...):
        # assertions go here
as their recorder.  Such a recorder cannot do very much at all.

> Checkout the documentation for consoletest. I guess in the current
> release recording and replaying can't be done in the same
> run. I've got a corrected version on my disk but I didn't uploaded it
> yet and corrected the docs.

<snip>

> there is no fundamental reason why it can't be separated from
> eeconsole.py.

OK.  That might be a good idea.

<snip>

> How does metatest analyze the tested expression? Lets say I try to
> check this expression
> 
>>>>plus( f(1) == True, f(2) != False) == plus( f(2) == True, f(1) != False)
>>>

This won't work.  In fact, even though
     plus(2, 2) == 4
works
     4 == plus(2, 2)
won't.  (Not so odd.  We have (a+b) != (b+a) when a and b are distinct 
strings.  Metatest works by overloading the == or __eq__ operator.)

However, in practice I don't think this is a problem.  And if it is, 
then there should be a nice solution.  I hope that the tests we want to 
write are the same as the ones Metatest allows us to write.

My goal is to finding the simplest way, using Python syntax, to express 
or state the test we wish to run, and to then code Metatest to give the 
required meaning to he statement.

<snip>

-- 
Jonathan




From forty-two at is.nonze.ro  Sun Sep 16 15:24:37 2007
From: forty-two at is.nonze.ro (Thomas Jollans)
Date: Sun, 16 Sep 2007 21:24:37 +0200
Subject: Processing drag & drop on the desktop
In-Reply-To: <1189961614.510561.194610@w3g2000hsg.googlegroups.com>
References: <1189961614.510561.194610@w3g2000hsg.googlegroups.com>
Message-ID: <200709162124.38761.forty-two@is.nonze.ro>

On Sunday 16 September 2007, Pierre Quentel wrote:
> Hi all,
>
> I would like to create an application on a Windows machine, such that
> when a document is dragged and dropped on the application icon on the
> desktop, the document is processed by the application
>
> For instance, if I drag & drop an Outlook message or a PPT
> presentation, the application would propose to tag the document with
> keywords taken from a database
>
> Is it possible to do this with a Python script, and how ?

Maybe the file name is passed as a command-line argument ?

-- 
42 != 0


From brian.e.munroe at gmail.com  Sun Sep  2 17:41:43 2007
From: brian.e.munroe at gmail.com (Brian Munroe)
Date: Sun, 02 Sep 2007 21:41:43 -0000
Subject: Adding attributes stored in a list to a class dynamically.
In-Reply-To: <1i3t9va.1jkz4om1sajk8pN%aleax@mac.com>
References: <mailman.297.1188755850.28954.python-list@python.org>
	<1i3t9va.1jkz4om1sajk8pN%aleax@mac.com>
Message-ID: <1188769303.724140.248630@d55g2000hsg.googlegroups.com>

On Sep 2, 11:46 am, al... at mac.com (Alex Martelli) wrote:

> If you want to pass the attributes list it's simpler to do that
> directly, avoiding *a and **k constructs.  E.g.:
>
>   def __init__(self, a, b, attrs):
>     self.a = a
>     self.b = b
>     for attr in attrs:
>       name, value = attr.split('=')
>       setattr(self, name, value)
>

Alex:

Thanks for the example.  I too had been wondering about this for a
while.

One question though, which I haven't been able to find the answer from
scouring the internet.  What is the difference between calling
__setattr__ and setattr or __getattr__ and getattr, for that matter?

>From my example that follows, it doesn't seem to make a difference?

thanks

-- brian

class Person(object):

	def __init__(self):
		pass

	def newAttribute(self,name,value=None):
   		setattr(self,name, value)

	def newAttribute2(self,name,value=None):
   		self.__setattr__(name, value)

	def dump(self):
		for self.y in self.__dict__.keys():
			yield self.y + "=" + getattr(self,self.y)

p1 = Person()
p1.newAttribute('fname','Brian')
p1.newAttribute('lname','Munroe')
p1.newAttribute2("mi","E")

for x in p1.dump():
	print x



From kishore at mindriver-it.com  Wed Sep 26 03:06:21 2007
From: kishore at mindriver-it.com (kishore at mindriver-it.com)
Date: Wed, 26 Sep 2007 12:36:21 +0530
Subject: Urgent Requirement for Bangalore Location
In-Reply-To: <mailman.3748.1190789703.2656.python-list@python.org>
Message-ID: <20070926070224.A78AA1E4012@bag.python.org>

 

Hi 

 

  This is krishna kishore from MindRiver. We have an Urgent requirement for
Python Developers with 5-7Yrs of Exp

 

Mandatory Skills                                  :    Python and c and c++

 

Exp                                                     :    5-7 yrs

 

Qualification                     :   B.E ONLY

 

Work Location                    : Bangalroe.

 

                       If you are Looking for a change Please forward your
Updated Profile.

 

Thanks & Regards,

Kishore Seethanraju |Senior Associate-People Consulting| MindRiver
Information Technologies Pvt. Ltd.
Suite# 512, 4th Floor and Suite # 104, Ground Floor ,Oxford Towers, 139,
Airport Road, Bangalore 560 008| Tel: +91.80.3052.1600 |Direct:
+91.80.3057.5799| Mobile: + 91.9901 96 1696 | Fax: +91.80.3057.5797| Email:
kishore at mindriver-it.com <mailto:skishore at mindriver-it.com>  | Web
www.mindriver-it.com <http://www.mindriver-it.com/>  

Information transmitted by this-mail is proprietary to MindRiver and / or
its Customers and is intended for use only by the individual or entity to
which it is addressed, and may contain information that is privileged,
confidential or exempt from disclosure under applicable law. If you are not
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you without proper authority, you are notified that any use or dissemination
of this information in any manner is strictly prohibited. In such cases,
please notify us immediately at the above mentioned telephone number or
email to services at mindriver-it.com and delete this mail from your records.
We believe this email to be virus free but do not warrant that this is the
case and we will not accept liability for any losses arising from any virus
being transmitted unintentionally by us'

 

 

-----Original Message-----
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Of python-list-request at python.org
Sent: Wednesday, September 26, 2007 12:25 PM
To: python-list at python.org
Subject: Python-list Digest, Vol 48, Issue 389

 

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From grante at visi.com  Tue Sep 18 10:35:30 2007
From: grante at visi.com (Grant Edwards)
Date: Tue, 18 Sep 2007 14:35:30 -0000
Subject: Tutorial or Example (or Tutorial) of Using Canvas to Produce a
	Plot
References: <phRHi.50851$Um6.35199@newssvr12.news.prodigy.net>
Message-ID: <13evohih7rkd030@corp.supernews.com>

On 2007-09-18, W. Watson <wolf_tracks at invalid.com> wrote:

> I'm looking for an example with canvas that produces, say, a
> complete x-y plot of some data.

With what widget set?

-- 
Grant Edwards                   grante             Yow! I'm a nuclear
                                  at               submarine under the
                               visi.com            polar ice cap and I need
                                                   a Kleenex!


From __peter__ at web.de  Mon Sep 17 07:23:03 2007
From: __peter__ at web.de (Peter Otten)
Date: Mon, 17 Sep 2007 13:23:03 +0200
Subject: Python "with"
References: <fck2di$7to$1@ss408.t-com.hr> <fcleos$2rt$1@news2.u-psud.fr>
	<fclikb$blt$1@news2.carnet.hr>
Message-ID: <fclo2n$qf1$03$1@news.t-online.com>

Ivan Voras wrote:

> Well, no, but this might be due to personal tastes. At least, I don't
> think it's better then some other alternatives. For example, in C99 you
> can do:
> 
> static struct option_s foo_option = {
>      .name = "foo",
>      .type = O_STRING,
>      .def_value = "default"
> };
> 
> At least to me, this looks even better than the Pascal's syntax.

foo_option = OptionS(
    name="foo",
    type=O_STRING,
    def_value="default"
)

So doesn't the Python analog even look better than C? If so, you don't
need new syntax:

>>> def with_(obj, **update):
...     for nv in update.iteritems():
...             setattr(obj, *nv)
...
>>> with_(a.long.way.to.tipperary,
...     alpha=42,
...     beta="yadda",
...     gamma=None
... )
>>> a.long.way.to.tipperary
A(alpha=42, beta='yadda', gamma=None)

Peter


From zzbbaadd at aol.com  Mon Sep  3 22:56:04 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Mon, 03 Sep 2007 19:56:04 -0700
Subject: list index()
In-Reply-To: <MPG.2146681e70c0336a98970f@news.individual.de>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<46d674c2$0$417$426a34cc@news.free.fr>
	<878x7te9h4.fsf@benfinney.id.au>
	<MPG.2146681e70c0336a98970f@news.individual.de>
Message-ID: <1188874564.111842.87750@57g2000hsv.googlegroups.com>


>
> Actually there was. The OP's claim
> | There are a million situations where you can have an item not be in
> | a list and it is not an exception situation.
>
> ...is just plain nonsense. zzbbaadd neither does understand exceptions
> nor what they are used for in Python. An item not being in a list is
> an exception situation /by definition/.

It won't be /by definition/ in my fork of Python 3, which I am pleased
to announce now, is called Python 3.01 while in development, and will
be known as Python 3000 or Python 3K when it gets to a productional
release. So in regard to Python 3000, your statement will be plain
nonsense.





From paul.hankin at gmail.com  Wed Sep 26 11:20:26 2007
From: paul.hankin at gmail.com (Paul Hankin)
Date: Wed, 26 Sep 2007 15:20:26 -0000
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <1190816657.574437.80980@g4g2000hsf.googlegroups.com>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
	<1190748509.786571.124150@n39g2000hsh.googlegroups.com>
	<1190753722.026806.254530@d55g2000hsg.googlegroups.com>
	<1190756003.292096.71130@o80g2000hse.googlegroups.com>
	<1190789981.385466.37870@57g2000hsv.googlegroups.com>
	<Xns99B760A3F5859duncanbooth@127.0.0.1>
	<1190805297.182232.116830@50g2000hsm.googlegroups.com>
	<Xns99B7957CCE43Fduncanbooth@127.0.0.1>
	<1190815180.945099.248670@n39g2000hsh.googlegroups.com>
	<1190816657.574437.80980@g4g2000hsf.googlegroups.com>
Message-ID: <1190820026.299569.110250@n39g2000hsh.googlegroups.com>

On Sep 26, 3:24 pm, Mark Summerfield <m.n.summerfi... at googlemail.com>
wrote:
> On 26 Sep, 14:59, Paul Hankin <paul.han... at gmail.com> wrote:
>
>
>
> > On Sep 26, 2:46 pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
>
> > > Paul Hankin <paul.han... at gmail.com> wrote:
> > > > More flexibly, keep a set of inserted keys that haven't yet been
> > > > included in the sorted list, and a set of deleted keys that haven't
> > > > yet been removed from the sorted list. The cache is invalid if either
> > > > of these sets are empty - and to make it valid you can choose what to
> > > > do based on the sizes of the two sets (and the sorted list). For
> > > > instance, if there's just been one insertion you're probably better
> > > > doing an insertion rather than a full resort. Of course, there's a few
> > > > nasty cases here but it's always possible to just throw away the
> > > > sorted list and reconstruct it from the dict keys when things get too
> > > > hairy (eg, the user deletes a key that's in the inserted-but-not-yet-
> > > > sorted set).
>
> > > Yes that sounds good. Did you mean 'The cache is invalid if either of
> > > these sets is not empty'?
>
> > Yes :)
>
> > > If you delete a key which is in the inserted set you can simply delete
> > > it from the inserted set.
>
> > No, in case it was already in the sorted list before the insert. You
> > have to remove it from the inserted set AND add it to the deleted set.
>
> > --
> > Paul Hankin
>
> So should Duncan's
>
>     def __removekey(self, key):
>         if key in self.__addkeys:
>             del self.__addkeys[key]
>         else:
>             self.__delkeys.add(key)
>
> be changed to:
>
>     def __removekey(self, key):
>         if key in self.__addkeys:
>             del self.__addkeys[key]
>         self.__delkeys.add(key)

Yes, and the same in __addkey: if it's in __delkeys it should be
removed from there, and added to __addkeys. There's an invariant: any
key is in at most one of __addkeys and __delkeys.

> (BTW I'm happy to put up a new version on PyPI, but I'm v. conscious
> of the fact that the key ideas and code have come from you and Duncan,
> so if either of you would like to adopt it, I will gladly step aside.
> I just want a sorteddict in Python, and I don't mind who does it:-)

Speaking for myself, I'm happy to have helped out, but you should
carry on.

--
Paul Hankin



From BjornSteinarFjeldPettersen at gmail.com  Sat Sep 29 15:05:26 2007
From: BjornSteinarFjeldPettersen at gmail.com (thebjorn)
Date: Sat, 29 Sep 2007 12:05:26 -0700
Subject: Program inefficiency?
In-Reply-To: <1191090727.614819.292550@50g2000hsm.googlegroups.com>
References: <1191079347.192272.240540@22g2000hsm.googlegroups.com>
	<1191087234.915654.182370@k79g2000hse.googlegroups.com>
	<mailman.1284.1191088565.2658.python-list@python.org>
	<1191090293.017485.225470@y42g2000hsy.googlegroups.com>
	<1191090727.614819.292550@50g2000hsm.googlegroups.com>
Message-ID: <1191092726.433738.119840@w3g2000hsg.googlegroups.com>

On Sep 29, 8:32 pm, hall.j... at gmail.com wrote:
> It think he's saying it should look like this:
>
> # File: masseditor.py
>
> import re
> import os
> import time
>
> p1= re.compile('(href=|HREF=)+(.*)(#)+(.*)(\w\'\?-<:)+(.*)(">)+')
> p2= re.compile('(name=")+(.*)(\w\'\?-<:)+(.*)(">)+')
> p100= re.compile('(a name=)+(.*)(-)+(.*)(></a>)+')
> q1= r"\1\2\3\4_\6\7"
> q2= r"\1\2_\4\5"
>
> def massreplace():
>     editfile = open("C:\Program Files\Credit Risk Management\Masseditor
> \editfile.txt")
>     filestring = editfile.read()
>     filelist = filestring.splitlines()
>
>     for i in range(len(filelist)):
>         source = open(filelist[i])
>         starttext = source.read()
>
>         for i in range (13):
>             interimtext = p1.sub(q1, starttext)
>             interimtext= p2.sub(q2, interimtext)
>             interimtext= p100.sub(q2, interimtext)
>         source.close()
>         source = open(filelist[i],"w")
>         source.write(finaltext)
>         source.close()
>
> massreplace()
>
> I'll try that and see how it works...

Ok, if you want a single RE... How about:


  test = '''
  <a href="Web_Sites.htm#A Web Sites">
  <a name="A Web Sites"></a>
  <a
  href="Web_Sites.htm#A Web Sites">
  <a
  name="A Web Sites"></a>
  <a HREF="Web_Sites.htm#A Web                             Sites">
  <a name=Quoteless></a>
  <a name = "oo ps"></a>
  '''

  import re

  r = re.compile(r'''
      (?:href=['"][^#]+[#]([^"']+)["'])
    | (?:name=['"]?([^'">]+))
  ''', re.IGNORECASE | re.MULTILINE | re.DOTALL | re.VERBOSE)

  def zap_space(m):
      return m.group(0).replace(' ', '_')

  print r.sub(zap_space, test)

It prints out

  <a href="Web_Sites.htm#A_Web_Sites">
  <a name="A_Web_Sites"></a>
  <a
  href="Web_Sites.htm#A_Web_Sites">
  <a
  name="A_Web_Sites"></a>
  <a HREF="Web_Sites.htm#A_Web_____________________________Sites">
  <a name=Quoteless></a>
  <a name = "oo ps"></a>

-- bjorn



From pavlovevidence at gmail.com  Sat Sep 22 15:29:01 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sat, 22 Sep 2007 15:29:01 -0400
Subject: Getting rid of bitwise operators in Python 3?
References: <46f49740$0$32514$4c368faf@roadrunner.com>
	<1190472612.942736.325850@w3g2000hsg.googlegroups.com>
Message-ID: <46f57841$1$15333$4c368faf@roadrunner.com>

On Sat, 22 Sep 2007 14:50:12 +0000, Paddy wrote:
> Sorry Carl,
> I think *you* may not have much need for bitwise operators but others,
> including myself do. No matter what the usage found, I would think
> replacing bitwise operators by function calls a retrograde step.

Well, if people are going to take the suggestion this personally, maybe 
that's reason enough not to bother.


Carl Banks


From q16941 at motorola.com  Tue Sep  4 02:01:12 2007
From: q16941 at motorola.com (ashish)
Date: Tue, 04 Sep 2007 11:31:12 +0530
Subject: HTTPS request
Message-ID: <46DCF4A8.9040305@motorola.com>

Hi ,

I want to send HTTPs put request to the server .Can any one help me how 
to do that .

I am using this code

import httplib
from group import *

class HTTPS:


        def __init__(self,ip,port=443):

                self.ip=ip
                self.port=port

                self.conn = httplib.HTTPSConnection(str(self.ip))

        def send_request(self,method,uri,data=None,headers=None):


                self.conn.request(method,uri,data,headers)

 if __name__=="__main__"

http_obj=HTTPS('10.51.26.203')
headers={"Content-type": "application/auth-policy+xml","Accept": 
"text/plain"}
data="some xml doc"
http_obj.send_request('PUT',uri,data,headers=headers)


But it dumps core where ever i run this.Please tell me where i am going 
wrong.

Regards
Ashish



From piet at cs.uu.nl  Thu Sep 20 09:14:38 2007
From: piet at cs.uu.nl (Piet van Oostrum)
Date: Thu, 20 Sep 2007 15:14:38 +0200
Subject: Sets in Python
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
	<CeB*qHeVr@news.chiark.greenend.org.uk>
	<1190235483.412972.81280@v23g2000prn.googlegroups.com>
	<13f3m15igkstq2e@corp.supernews.com>
Message-ID: <m264258on5.fsf@cs.uu.nl>

>>>>> Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> (SD) wrote:

>SD> In other words, if you have two mutable objects M1 and M2, then you 
>SD> expect:

>SD> hash(M1) == hash(M2) if and only if M1 and M2 are equal
>SD> hash(M1) != hash(M2) if M1 and M2 are unequal

Huh? Unequal things may hash to the same value. That one of the essential
properties of a hash function.
-- 
Piet van Oostrum <piet at cs.uu.nl>
URL: http://www.cs.uu.nl/~piet [PGP 8DAE142BE17999C4]
Private email: piet at vanoostrum.org


From steve at holdenweb.com  Wed Sep 19 08:47:52 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 19 Sep 2007 08:47:52 -0400
Subject: cannot create my own dict
In-Reply-To: <slrnff260r.43o.hat@se-162.se.wtb.tue.nl>
References: <slrnff260r.43o.hat@se-162.se.wtb.tue.nl>
Message-ID: <fcr5pl$uf1$1@sea.gmane.org>

A.T.Hofkamp wrote:
> Hello all,
> 
> This morning I tried to create my own read-only dictionary, and failed
> miserably.
> I don't understand why, can somebody enlighten me?
> 
> Below is a brute-force experiment that cannot deal with "x in obj", plz read
> the explanation below the code:
> --------------------------------
> class myowndict(object):
>     def __init__(self, mydict):
>         self.mydict = mydict
> 
> # Below is produced with
> # print '\n'.join(['        self.%s = self.mydict.%s' % (v,v)
> #                                         for v in dir(dict)])
> # commented-out functions done by hand
> #
>         #self.__class__ = self.mydict.__class__
>         self.__cmp__ = self.mydict.__cmp__
>         self.__contains__ = self.mydict.__contains__
>         self.__delattr__ = self.mydict.__delattr__
>         self.__delitem__ = self.mydict.__delitem__
>         #self.__doc__ = self.mydict.__doc__
>         self.__eq__ = self.mydict.__eq__
>         self.__ge__ = self.mydict.__ge__
>         self.__getattribute__ = self.mydict.__getattribute__
>         self.__getitem__ = self.mydict.__getitem__
>         self.__gt__ = self.mydict.__gt__
>         self.__hash__ = self.mydict.__hash__
>         #self.__init__ = self.mydict.__init__
>         self.__iter__ = self.mydict.__iter__
>         self.__le__ = self.mydict.__le__
>         self.__len__ = self.mydict.__len__
>         self.__lt__ = self.mydict.__lt__
>         self.__ne__ = self.mydict.__ne__
>         #self.__new__ = self.mydict.__new__
>         self.__reduce__ = self.mydict.__reduce__
>         self.__reduce_ex__ = self.mydict.__reduce_ex__
>         self.__repr__ = self.mydict.__repr__
>         self.__setattr__ = self.mydict.__setattr__
>         self.__setitem__ = self.mydict.__setitem__
>         self.__str__ = self.mydict.__str__
>         self.clear = self.mydict.clear
>         self.copy = self.mydict.copy
>         self.fromkeys = self.mydict.fromkeys
>         self.get = self.mydict.get
>         self.has_key = self.mydict.has_key
>         self.items = self.mydict.items
>         self.iteritems = self.mydict.iteritems
>         self.iterkeys = self.mydict.iterkeys
>         self.itervalues = self.mydict.itervalues
>         self.keys = self.mydict.keys
>         self.pop = self.mydict.pop
>         self.popitem = self.mydict.popitem
>         self.setdefault = self.mydict.setdefault
>         self.update = self.mydict.update
>         self.values = self.mydict.values
> 
>         # end of __init__
> 
> if __name__ == '__main__':
>     fd = myowndict({1:10})
>     print 1 in fd  # FAILS! (with "TypeError: iterable argument required")
> --------------------------------
> 
> I wanted to make my own dictionary. However, a simple element test failed
> (after implementing various __*__ functions), and I cannot figure out why.
> 
> The above code is a brute force attempt, where I forward all methods (except
> __class__, __doc__, __init__, and __new__) to my local 'mydict' object.
> 
> IT STILL FAILS.
> 
> So if copying all methods of a native dictionary is not enough, what should I
> do to make my class work as a dictionary WITHOUT deriving from dict (which will
> obviously work).
> 
You have to overwrite the "__new__" method to return an object of your 
new type.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From zzbbaadd at aol.com  Wed Sep 19 15:44:54 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Wed, 19 Sep 2007 12:44:54 -0700
Subject: Google and Python
In-Reply-To: <ufadnRC5BPZm6GzbnZ2dnUVZ_jOdnZ2d@comcast.com>
References: <1190228512.627109.308910@n39g2000hsh.googlegroups.com>
	<ufadnRC5BPZm6GzbnZ2dnUVZ_jOdnZ2d@comcast.com>
Message-ID: <1190231094.276099.136250@22g2000hsm.googlegroups.com>


> Have you tried Google "google python".  Turns up a lot of links for me.
>
I had done it on this newsgroup, but not google. I did find a pretty
good link:

http://panela.blog-city.com/python_at_google_greg_stein__sdforum.htm

Which says:
"A few services including code.google.com and google groups.  Most
other front ends are in C++ (google.com) and Java (gmail).  All web
services are built on top of a highly optimizing http server wrapped
with SWIG."

I am not clear on how you would use a language - whether C++, Java or
Python to write the web app with this custom http server. Is this http
server what is referred to as an "application server" or is it the
main web server which is usually Apache at most sites?



From steve at holdenweb.com  Tue Sep 11 08:48:02 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 11 Sep 2007 08:48:02 -0400
Subject: Checking if elements are empty
In-Reply-To: <slrnfectjp.1n0.horpner@FIAD06.norwich.edu>
References: <2323A6D37908A847A7C32F1E3662C80E010A0246@dc1ex01.air.org>	<fbme5d$qa$1@sea.gmane.org>	<mailman.93.1189003016.2658.python-list@python.org>	<fbqedh$31g$1@lust.ihug.co.nz>	<46e115e5$0$7691$9b4e6d93@newsspool2.arcor-online.net>	<fbsqqs$efc$2@lust.ihug.co.nz>	<46e2013a$0$7687$9b4e6d93@newsspool2.arcor-online.net>	<slrnfead5j.mo.horpner@FIAD06.norwich.edu>	<mailman.321.1189434264.2658.python-list@python.org>	<slrnfeaoed.b4.horpner@FIAD06.norwich.edu>	<mailman.329.1189439834.2658.python-list@python.org>	<slrnfeauhp.14c.horpner@FIAD06.norwich.edu>	<mailman.360.1189483878.2658.python-list@python.org>
	<slrnfectjp.1n0.horpner@FIAD06.norwich.edu>
Message-ID: <fc62q1$dhr$2@sea.gmane.org>

Neil Cerutti wrote:
> On 2007-09-10, Steve Holden <steve at holdenweb.com> wrote:
>>> I have a quibble not with the functionality of the boolean check,
>>> but with its expressiveness. if y[0] == "" expresses more, i.e.,
>>> that I expect y[0] to contain a Python byte string.
>> I have a quibble with a test that will raise an exception when
>> the anticipated condition is true. Your test is patently
>> absurd, as you would have discovered had you bothered to try
>> it:
> 
> "if y[0] == "" expresses more, i.e., that I expect y[0] to
> contain a Python byte string."
> 
That isn't unreasonable immediately after

y = "...".split(...)

though, is it? I was talking tosh above.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From bj_666 at gmx.net  Tue Sep 11 08:28:27 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 11 Sep 2007 12:28:27 GMT
Subject: IOError - list of all Errno numbers and their meanings?
References: <mailman.377.1189512510.2658.python-list@python.org>
Message-ID: <5knfvbF4b65dU5@mid.uni-berlin.de>

On Tue, 11 Sep 2007 13:08:25 +0100, Tim Couper wrote:

> As you know, when an IOError is raised, you get a helpful:
> 
> [Errno N] <useful descriptor of the error>
> 
> Is there a list of all possible values of N which can be returned, and 
> their meanings?

Take a look at the `errno` module and the `os.strerror()` function.

Ciao,
	Marc 'BlackJack' Rintsch


From dteslenko at gmail.com  Wed Sep 26 03:59:03 2007
From: dteslenko at gmail.com (Dmitry Teslenko)
Date: Wed, 26 Sep 2007 11:59:03 +0400
Subject: os.popen and lengthy operations
In-Reply-To: <B8230E44-AF99-43DC-8EAE-31E0033CDD34@comhem.se>
References: <91325fec0709192331i700cd172seb9534288f200424@mail.gmail.com>
	<B8230E44-AF99-43DC-8EAE-31E0033CDD34@comhem.se>
Message-ID: <91325fec0709260059l4649c978w3bcf66a7f384d65c@mail.gmail.com>

Hello!

On 24/09/2007, Tommy Nordgren <tommy.nordgren at comhem.se> wrote:
>        Your problem is that you are not reading the standard output and
> standard error streams in the correct way.
> You need to do the reading of standard out and standard err in
> parallell rather than sequentially.
> The called process can't proceed when it's output buffers are full.
> Pipes is limited by small buffers (for examples 512 bytes
> on Mac OS X)

Thanks to all for your comprehensive explanation!


From anuraguniyal at gmail.com  Fri Sep 28 02:30:20 2007
From: anuraguniyal at gmail.com (Anurag)
Date: Thu, 27 Sep 2007 23:30:20 -0700
Subject: marshal bug?
Message-ID: <1190961020.258850.215130@g4g2000hsf.googlegroups.com>

I have been chasing a problem in my code since hours and it bolis down
to this
import marshal
marshal.dumps(str(123)) != marshal.dumps(str("123"))

Can someone please tell me why?
when
str(123) == str("123")

or are they different?

it also means that
if s = str(123)
marshal.dumps(s) != marshal.dumps(marshal.loads(marshal.dumps(s)))

rgds
Anurag



From wizzardx at gmail.com  Fri Sep 21 14:44:49 2007
From: wizzardx at gmail.com (David)
Date: Fri, 21 Sep 2007 20:44:49 +0200
Subject: RE Help
In-Reply-To: <1190399985.324448.242610@d55g2000hsg.googlegroups.com>
References: <1190399985.324448.242610@d55g2000hsg.googlegroups.com>
Message-ID: <18c1e6480709211144m3e0d4b2cn3ccf39cc554eb775@mail.gmail.com>

> data = "asdfasgSTARTpruyerfghdfjENDhfawrgbqfgsfgsdfg"
> x = re.compile('START.END', re.DOTALL)

This should work:

x = re.compile('START(.*)END', re.DOTALL)


From jgardner.jonathangardner.net at gmail.com  Thu Sep  6 18:42:19 2007
From: jgardner.jonathangardner.net at gmail.com (Jonathan Gardner)
Date: Thu, 06 Sep 2007 22:42:19 -0000
Subject: Changing data in an QAbstractListModel
In-Reply-To: <1189095176.973314.227720@r29g2000hsg.googlegroups.com>
References: <1189095176.973314.227720@r29g2000hsg.googlegroups.com>
Message-ID: <1189118539.748092.250140@g4g2000hsf.googlegroups.com>

On Sep 6, 9:12 am, "exhuma.twn" <exh... at gmail.com> wrote:
> I defined a simple "update" method in the model which I call on
> certain events to fetch the new data in the DB. I tried to "emit" the
> "dataChanged()" signal of the Model without success. I don't know
> where I should get the two required "index" parameters from.
>
> Any hints?
>

Shouldn't the index method give you the indexes you need?



From p.lavarre at ieee.org  Sat Sep  1 11:44:47 2007
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: Sat, 01 Sep 2007 08:44:47 -0700
Subject: platform system may be Windows or Microsoft since Vista
In-Reply-To: <1188584386.174981.168040@z24g2000prh.googlegroups.com>
References: <1188578878.264671.296440@k79g2000hse.googlegroups.com>
	<1188584386.174981.168040@z24g2000prh.googlegroups.com>
Message-ID: <1188661487.176167.32600@57g2000hsv.googlegroups.com>

> > suppose you get Python for Vista Windows today
> > if platform.system() in ('Windows', 'Microsoft'):
> > if not (platform.system() in ('Windows', 'Microsoft')):
>
> Good analysis.

Yes I am sane!! Thank you for saying.

> Log a bug @ bugs.python.org

Glad to hear I can help. I created:

http://bugs.python.org/issue1082
TITLE = (no priority set) platform system may be Windows or Microsoft
since Vista
CREATOR = p.lavarre at ieee.org

The Search Tracker there now finds this bug within: platform system
Windows Microsoft

Thanks again for clueing me in promptly,

P.S. http://bugs.python.org/issue1082 now includes the musings:

NOTES:

There is no fixing all of this?

Cross-platform scripts actually will misbehave across the large
population that is 2.5 Python in Vista unless those scripts change to
implement something like the suggested workaround, that's now an
accomplished fact.

Question: Is it better to leave this feature as is, so that everyone
eventually learns to workaround it, or is it better to fix it late now
in 2007-09, so that many people never have to learn to workaround it?

Question: Why are we screen-scraping the Ver command, instead of
calling Win kernel32.getVersionEx? And how can any code for screen-
scraping the Ver command be in doubt about whether the platform.system
underneath is 'Windows'?

P.P.S.

http://wiki.python.org/moin/SubmittingBugs
is the page that newbie Python bug reporters should read first, I
guess

My path to that page was as follows ...

> Log a bug @ bugs.python.org

Indeed the Search Tracker finds no hits at: platform system Windows
Microsoft

Vaguely feels like e-mail registration required? Ick. Ok. Ah, the
Issues > Create New menu item appears after login, good.

Those bug Types are labeled in English but otherwise undefined. (Later
I see I could contribute my guess of definitions at
http://wiki.python.org/moin/TrackerDocs/.) I guess surprising result
values like I'm seeing count as 'Behavior' else 'RFE' else 'Security',
but not in ('Crash', 'Compile', 'Resource Usage'). I guess by RFE we
mean a wish, i.e., a Request For Enhancement.

Ok then:

TITLE: platform system may be Windows or Microsoft since Vista
TYPE: Behavior
SEVERITY: Major (not Critical, Urgent, Normal, Minor)
COMPONENTS: Windows

All the "process" fields I guess I should leave blank. Somehow there
is no place to describe the bug in detail??? I guess I Submit New
entry anyhow ... Oh no, not actually. There is online help of Wiki
quality!!

Clicking thru that online help eventually explains:

"""
Change Note: describe the problem in detail, including what you
expected to happen and what did happen. Be sure to include whether any
extension modules were involved, and what hardware and software
platform you were using (including version information as
appropriate).
"""

Thus, I wrote ...

SUMMARY:

'Microsoft' is the platform.system() of Vista Windows, whereas
'Windows' was the platform.system() of XP Windows, whoops.

STEPS TO REPRODUCE & ACTUAL RESULTS:

Run 2.5.1 Python in a Vista and see:

>>> import platform
>>> platform.system()
>>>
'Microsoft'
>>>

EXPECTED RESULTS:

>>> import platform
>>> platform.system()
'Windows'
>>>

WORKAROUND:

Write new Python source code like:

if platform.system() in ('Windows', 'Microsoft'):
if not (platform.system() in ('Windows', 'Microsoft')):

in place of obsolete Python source code like:

if platform.system() == 'Windows': # Microsoft
if platform.system() != 'Windows': # Microsoft

REGRESSION/ ISOLATION:

Seen by me in an Enterprise Vista. Indexed by Google as reported by
Martin v. L?wis (loewis) circa 2007-05-29 07:11 as:

http://mail.python.org/pipermail/patches/2007-June/022947.html
...

Patches item #1726668, was opened at 2007-05-28 03:23

On Microsoft Vista platform.system() returns 'Microsoft' and
platform.release() returns 'Windows'

Under Microsoft Windows XP SP2 platform.system() returns 'Windows' and
platform.release() returns 'XP'.

This is problem was caused by a change in the output of the "ver"
command. In Windows XP SP2 "ver" outputted 'Microsoft Windows XP
[Version 5.1.2600]'  In Microsoft Vista "ver" outputted 'Microsoft
Windows [Version 6.0.6000]'. The lack of the 3rd word before version
causes _syscmd_ver(...) in platform.py to return 'Microsoft' for
system instead of 'Microsoft Windows'. This causes uname() to return
the incorrect values. Both system() and release() call uname().

NOTES:

[as above]



From aine_canby at yahoo.com  Mon Sep 10 07:38:07 2007
From: aine_canby at yahoo.com (aine_canby at yahoo.com)
Date: Mon, 10 Sep 2007 04:38:07 -0700
Subject: Enum class with ToString functionality
In-Reply-To: <1189424137.007519.272320@y42g2000hsy.googlegroups.com>
References: <1189416537.050002.61120@r34g2000hsd.googlegroups.com>
	<1189424137.007519.272320@y42g2000hsy.googlegroups.com>
Message-ID: <1189424287.131246.35350@o80g2000hse.googlegroups.com>

On 10 Sep, 13:35, TheFlyingDutchman <zzbba... at aol.com> wrote:
> On Sep 10, 2:28 am, bg... at yahoo.com wrote:
>
>
>
>
>
> > Hi,
>
> > I have the following class -
>
> > class TestOutcomes:
> >     PASSED = 0
> >     FAILED = 1
> >     ABORTED = 2
>
> > plus the following code -
>
> > testResult = TestOutcomes.PASSED
>
> > testResultAsString
> > if  testResult == TestOutcomes.PASSED:
> >     testResultAsString = "Passed"
> > elif testResult == TestOutcomes.FAILED :
> >     testResultAsString = "Failed"
> > else:
> >     testResultAsString = "Aborted"
>
> > But it would be much nicer if I had a function to covert to string as
> > part of the TestOutcomes class. How would I implement this?
>
> > Thanks,
>
> > Barry
>
> The equivalent to Java's toString() is __str__() in Python:
>
> class TestOutcomes:
>     PASSED = 0
>     FAILED = 1
>     ABORTED = 2
>
>     def __init__(self,outcome):
>         self.outcome = outcome
>
>     def __str__(self):
>         if  self.outcome == TestOutcomes.PASSED:
>            return "Passed"
>         elif self.outcome == TestOutcomes.FAILED :
>            return "Failed"
>         else:
>            return "Aborted"
>
> if __name__ == "__main__":
>     testResult = TestOutcomes(TestOutcomes.ABORTED)
>     print testResult
>     testResult = TestOutcomes(TestOutcomes.FAILED)
>     a = testResult.__str__()
>     print a
>
> Aborted
> Failed- D?lj citerad text -
>
> - Visa citerad text -

Would this be crazy? -

class TestOutcomes:
    PASSED = "PASSED"
    FAILED = "FAILED"
    ABORTED = "ABORTED"



From dtrudgett at yahoo.com  Sat Sep  8 22:18:09 2007
From: dtrudgett at yahoo.com (David Trudgett)
Date: Sun, 09 Sep 2007 12:18:09 +1000
Subject: Spell-checking Python source code
References: <1189285495.185657.88010@o80g2000hse.googlegroups.com>
Message-ID: <uk5r0wpi6.fsf@yahoo.com>

John Zenger writes:

> In an ideal world, my IDE would do this with a red wavy line.

You didn't mention which IDE you use; however, if you use Emacs, there
is flyspell-prog-mode which does that for you (checks your spelling
"on the fly", but only within comments and strings).

Regards,
David Trudgett

-- 
These are not the droids you are looking for. Move along.


From robert.kern at gmail.com  Sun Sep  2 19:17:27 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Sun, 02 Sep 2007 18:17:27 -0500
Subject: Looking for Delaunay triangulation module...
In-Reply-To: <13dge9m2339ka68@corp.supernews.com>
References: <13dge9m2339ka68@corp.supernews.com>
Message-ID: <fbfgad$vgl$1@sea.gmane.org>

Grant Edwards wrote:
> Can anybody point me to a Delaunay triangulation module (for
> Win32)?  I'm currently using http://flub.stuffwillmade.org/delny/ under Linux, but I have
> been unable to find a build for Windows. I don't have the tools
> (or skills) to build libqhull and Pythion extensions on Win32).
> 
> I've also found the delaunay module in scipy's "sandbox".  I
> could never get that module to work under Linux, and I can't
> build it for Windows anyway.

I'm working on it today. I'm going to break it out into a separate package. If
you can remember what problems you had, I'd like to fix them. I'm clearing up a
number of (really dumb) memory leaks.

-- 
Robert Kern

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



From bert at bertisevil.tv  Mon Sep  3 04:24:30 2007
From: bert at bertisevil.tv (Evil Bert)
Date: Mon, 03 Sep 2007 08:24:30 GMT
Subject: So what exactly is a complex number?
In-Reply-To: <mailman.310.1188805355.28954.python-list@python.org>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>	<mailman.212.1188576194.28954.python-list@python.org>	<451mq4-les.ln1@ozzie.tundraware.com>	<mailman.266.1188644067.28954.python-list@python.org>	<lbjpq4-eo22.ln1@ozzie.tundraware.com>
	<mailman.310.1188805355.28954.python-list@python.org>
Message-ID: <2xPCi.52242$YL5.36894@newssvr29.news.prodigy.net>

Grzegorz S?odkowicz wrote:
> You're mixing terms again. Analogy is saying 'something is like 
> something else.'

Actually, that's a simile.


From jstroud at mbi.ucla.edu  Thu Sep 13 13:20:45 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 13 Sep 2007 10:20:45 -0700
Subject: recursion
In-Reply-To: <mailman.491.1189700115.2658.python-list@python.org>
References: <fcbfnj$lh4$1@ss408.t-com.hr>	<slrnfeinvk.1cc.horpner@FIAD06.norwich.edu>
	<mailman.491.1189700115.2658.python-list@python.org>
Message-ID: <2eeGi.4309$7P7.3812@newssvr19.news.prodigy.net>

Ian Clark wrote:
> Neil Cerutti wrote:
>> On 2007-09-13, Gigs_ <gigs at hi.t-com.hr> wrote:
>>> Can someone explain me this
>>>
>>>>>> def f(l):
>>>     if l == []:
>>>         return []
>>>     else:
>>>         return f(l[1:]) + l[:1]  # <= cant figure this, how is all 
>>> sum at the end?
>>
>> In plain English, the above program says:
>>
>> The sum of the items in list l is zero if the list is empty.
>> Otherwise, the sum is the value of the first item plus the sum of
>> the rest of the items in the list.
> 
> Am I missing something? What does this have to do with summing?
> 
>     >>> def f(l):
>     ...     if l == []:
>     ...         return []
>     ...     else:
>     ...         return f(l[1:]) + l[:1]
>     ...
>     >>> f([1, 2, 3, 4])
>     [4, 3, 2, 1]
> 
> Ian

Add it up!

Round   Sum

   0     f([1, 2, 3, 4])
   1     f([2, 3, 4]) + [1]
   2     f([3, 4]) + [2] + [1]
   3     f([4]) + [3] + [2] + [1]
   4     f([]) + [4] + [3] + [2] + [1]

Total   [] + [4] + [3] + [2] + [1] = [4, 3, 2, 1]

James


From pavlovevidence at gmail.com  Wed Sep 12 12:06:27 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Wed, 12 Sep 2007 09:06:27 -0700
Subject: An ordered dictionary for the Python library?
In-Reply-To: <1189605843.866907.117370@w3g2000hsg.googlegroups.com>
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<13efnmi4n959a59@corp.supernews.com>
	<1189601205.503841.327170@o80g2000hse.googlegroups.com>
	<1189605250.186948.303130@50g2000hsm.googlegroups.com>
	<1189605843.866907.117370@w3g2000hsg.googlegroups.com>
Message-ID: <1189613187.432090.18900@o80g2000hse.googlegroups.com>

On Sep 12, 10:04 am, Michele Simionato <michele.simion... at gmail.com>
wrote:
> On Sep 12, 3:54 pm, Mark Summerfield <m.n.summerfi... at googlemail.com>
> wrote:
>
>
>
> > On 12 Sep, 13:46, Michele Simionato <michele.simion... at gmail.com>
>
> > Actually I meant by key order, so insertion order doesn't matter at
> > all. If you need a dictionary-like data structure that respects
> > insertion order you could use a list of (key, value) tuples.
>
> > Another respondent asked about use cases.
>
> > I have found time and again that I needed (key, value) pairs where the
> > key is some string that provides a representation for human readers
> > and the value is some internal key (e.g., database ID) that the system
> > uses internally. In these cases I often need to present the user with
> > a list of items from which to choose and want to present them in
> > sorted order. Naturally, I could use an ordinary dict and then do
> > this:
>
> > for string in sorted(d.keys()):
> >     process(string)
>
> > But what happens when I need to do this a *lot* and when the number of
> > items is hundreds or a few thousands? I'm having to sort again and
> > again, since it is often the case that the items in the list changes
> > during the runtime of the application. So my solution in C++ is to use
> > an ordered dictionary (a map in C++ jargon), which in Python means I
> > can simply write:
>
> > for string in od.keys():
> >     process(string)
>
> For your use case I would wrap a list [(key, value)] with a dict-like
> object and I would use the bisect module in the standard library to
> keep
> the inner list ordered.

That would make insertion and deletion would be quite expensive.
Which might be ok for the OP, but it's often better to go with a
btree.

Which, you know, would be a reasonable candidate for collections
module.


Carl Banks



From lasses_weil at klapptsowieso.net  Mon Sep  3 07:17:29 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Mon, 03 Sep 2007 13:17:29 +0200
Subject: So what exactly is a complex number?
In-Reply-To: <mailman.310.1188805355.28954.python-list@python.org>
References: <eb79828c0708301811r38c836cdqf29382c31923c220@mail.gmail.com>	<mailman.212.1188576194.28954.python-list@python.org>	<451mq4-les.ln1@ozzie.tundraware.com>	<mailman.266.1188644067.28954.python-list@python.org>	<lbjpq4-eo22.ln1@ozzie.tundraware.com>
	<mailman.310.1188805355.28954.python-list@python.org>
Message-ID: <46dbed49$0$30375$9b4e6d93@newsspool4.arcor-online.net>

Grzegorz S?odkowicz wrote:
> In fact, a proper vector in physics has 4 features: point of 
> application, magnitude, direction and sense.
 >
OK, help me out here: What 'direction' does |?> (a state-vector in 
quantum mechanics) have? Also, doesn't sense directly follow from the 
point of application.

How about we quit being wiseasses right now. The wikipedia-article is 
good enough, so what's the point?

/W


From freesoftwareweb1 at gmail.com  Sat Sep 15 14:51:51 2007
From: freesoftwareweb1 at gmail.com (freesoftwareweb1 at gmail.com)
Date: Sat, 15 Sep 2007 18:51:51 -0000
Subject: Latest software here!!!!!
Message-ID: <1189882311.391961.125720@r29g2000hsg.googlegroups.com>

http://freesoftwareupgrades.blogspot.com/



From pavlovevidence at gmail.com  Fri Sep  7 04:02:45 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Fri, 7 Sep 2007 04:02:45 -0400
Subject: Why 'class spam(object)' instead of class spam(Object)' ?
References: <mailman.205.1189146609.2658.python-list@python.org>
Message-ID: <46e10916$0$16518$4c368faf@roadrunner.com>

On Fri, 07 Sep 2007 01:30:00 -0500, Sergio Correia wrote:
> Hi, I'm kinda new to Python (that means, I'm a total noob here), but
> have one doubt which is more about consistency that anything else.
> 
> Why if PEP 8 says that "Almost without exception, class names use the
> CapWords convention", does the most basic class, object, is lowercase?

It said "almost".  :)


> I found a thread about this:
> http://mail.python.org/pipermail/python-list/2007-April/437365.html
> where its stated that -object- is actually a type, not a class; but the
> idea still doesn't convince me.

There's a false dichotomy there: it's not an either-or situation.  Almost 
everyone would agree that new-style classes, defined by the Python class 
statement, are both classes and types.  Some might squabble over whether 
object is class, but it has nothing to do with why object is spelled in 
lower-case.

The reason why "object" is lower case is because built-in types are 
spelled in lower-case.  Why are built-in types lower case?  Because many 
built-in types were originially functions.  For example, "int" and "str" 
were once functions.  When these symbols became the names of their 
respective types, they kept the lower-case spelling, and it became 
convention for built-in types to be spelled lower-case.


Carl Banks


From grante at visi.com  Sun Sep 23 19:42:43 2007
From: grante at visi.com (Grant Edwards)
Date: Sun, 23 Sep 2007 23:42:43 -0000
Subject: building a GUI
References: <1190557293.266783.251480@y42g2000hsy.googlegroups.com>
	<mailman.940.1190560838.2658.python-list@python.org>
	<1190564924.417792.287930@o80g2000hse.googlegroups.com>
Message-ID: <13fdufj1t9925bf@corp.supernews.com>

On 2007-09-23, brice.fernandes at gmail.com <brice.fernandes at gmail.com> wrote:
> On Sep 23, 4:28 pm, stef mientki <stef.mien... at gmail.com> wrote:
>> yadin wrote:
>> > if i were up to make a GUI chich are the advantages of choosing python
>> > over matlab or java?
>>
>> As MatLab has a very lousy GUI,
>> any other language would be an advantage ;-)
>>
>> The best is Delphi,
>> second is VB,
>> then comes SciLab, Python, etc
>> I don't know where Java fits in.
>>
>> But as Wildemar said, your question is much to broad.
>>
>> cheers,
>> Stef
>
> Form a newbie's point of view, Java's Swing Libraries (gui
> stuff) are pretty easy to get to grips with, if a bit big.
> They are also incredibly well documented, and are distributed
> by sun with the core language.

Since you can use Swing from Python, it seems a false
dichotomoty to choose between Java and Python based on how well
you like Swing.  [I've never used Swing from Python -- I don't
have very heavyweight computers and try to avoid anything
Java-related.]  Though you can probably find more Swing
examples in Java than in Python....

-- 
Grant Edwards                   grante             Yow!  Well, I'm INVISIBLE
                                  at               AGAIN... I might as well
                               visi.com            pay a visit to the LADIES
                                                   ROOM...


From timothy.soehnlin at gmail.com  Thu Sep 13 08:10:03 2007
From: timothy.soehnlin at gmail.com (timothy.soehnlin at gmail.com)
Date: Thu, 13 Sep 2007 12:10:03 -0000
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <1189666095.727426.135170@o80g2000hse.googlegroups.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189666095.727426.135170@o80g2000hse.googlegroups.com>
Message-ID: <1189685403.306218.13270@22g2000hsm.googlegroups.com>

Why not use '_' as the self variable.  It is minimal and achieves
close to '.var', as '_.var' isn't that different.  I know its a little
perl-esque, but its not a bad convention if you are aiming to up
readability of your code.

class test:
   def __init__(self):
      _ = self;
      _.a = 0;
      _.u = 0;
      _.a_dot = 0;
   def k(self, val):
      return val**2; #not sure what k does
   def getA_Dot(self):
      _ = self;
      _.a_dot = _.k(_.a-_.u);



From pavlovevidence at gmail.com  Sat Sep  1 01:18:22 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: Sat, 1 Sep 2007 01:18:22 -0400
Subject: status of Programming by Contract (PEP 316)?
References: <1188349440.309634.182800@z24g2000prh.googlegroups.com>
	<-OadnXBZP4QfaknbnZ2dnUVZ_tHinZ2d@comcast.com>
	<1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<1188523589.736146.263510@l22g2000prc.googlegroups.com>
	<1i3o9kr.2gmni61g62moaN%aleax@mac.com>
	<7xwsvcc9yz.fsf@ruckus.brouhaha.com>
	<1i3p8lm.19738kn1q0gkouN%aleax@mac.com>
	<1188587846.687895.69240@q5g2000prf.googlegroups.com>
	<38rmq4-cq.ln1@strongwill.g2ctech>
Message-ID: <46d903db$0$19580$4c368faf@roadrunner.com>

On Fri, 31 Aug 2007 22:18:09 -0300, Jorge Godoy wrote:

> Russ wrote:
> 
>> Alex, I think you are missing the point. Yes, I'm sure that web
>> searches are critical to
>> Google's mission and commercial success. But the point is that a few
>> subtle bugs cannot
>> destroy Google. If your search engines and associated systems have
>> bugs, you fix them
>> (or simply tolerate them) and continue on. And if a user does not get
>> the results he wants,
>> he isn't likely to die over it -- or even care much.
> 
> But if this pattern of not getting wanted results is common, then the
> user will migrate to alternative search engines and this will *kill* the
> business.  Wrong results won't impact ONE search, but many will impact
> the company business and will be part of the recipe to take it out of
> business.
> 
>> Online financial transactions are another matter altogether, of course.
>> User won't die, but
>> they will get very irate if they lose money. But I don't think that's
>> what you are talking about
>> here.
> 
> Lets make someone loose his job and have all his money commitments
> compromised because of this money lost and we might be talking about
> people taking their lives.
> 
> Again, this isn't 100% sure to happen, but it *can* happen.
> 
> As it happens with a peacemaker: the user won't die if his heart skips
> one beat, but start skipping a series of them and you're incurring in
> serious problems.
> 
> Just because the result isn't immediate it doesn't mean it isn't
> critical.

This is starting to sound silly, people.  Critical is a relative term, 
and one project's critical may be anothers mundane.  Sure a flaw in your 
flagship product is a critical problem *for your company*, but are you 
really trying to say that the criticalness of a bad web search is even 
comparable to the most important systems on airplanes, nuclear reactors, 
dams, and so on?  Come on.

BTW, I'm not really agreeing with Russ here.  His suggestion (that 
because Python is not used in highly critical systems, it is not suitable 
for them) is logically flawed.  And Alex's point, that Python has a good 
track record of reliabilty (look at Google's 99.9% uptime) is valid 
whether Google is a critical system or not.

So please leave the laughable comparisons between flight systems and web 
searches out of it.  It's unnecessary and makes Pythoners look bad.


Carl Banks

(P.S. 99.9% uptime would be a critical flaw in the systems I work on.)


From exhuma at gmail.com  Wed Sep 26 02:51:42 2007
From: exhuma at gmail.com (exhuma.twn)
Date: Tue, 25 Sep 2007 23:51:42 -0700
Subject: Clustering text-documents in bundles
In-Reply-To: <7xir5y7hty.fsf@ruckus.brouhaha.com>
References: <1190733093.110073.101460@k79g2000hse.googlegroups.com>
	<7xir5y7hty.fsf@ruckus.brouhaha.com>
Message-ID: <1190789502.678193.293000@50g2000hsm.googlegroups.com>

On Sep 25, 7:52 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> "exhuma.twn" <exh... at gmail.com> writes:
> > Is it possible to calculate a distance between two chunks of text? I
> > suppose one could simply do a simple word-count on the chunks
> > (removing common noise words of course). And then go from there. Maybe
> > even assigning different weighting to words. But maybe there is a well-
> > tested and useful algorithm already available?
>
> There's a huge field of text mining that attempts to do things like
> this.  http://en.wikipedia.org/wiki/Latent_semantic_analysisfor some
> info about one approach.  Manning & Schutz's book "Foundations of Statistical
> Natural Language Processing" (http://nlp.stanford.edu/fsnlp/) is
> a standard reference about text processing.  They also have a
> new one about information retrieval (downloadable as a pdf) that
> looks very good: <http://informationretrieval.org>.

Thanks a lot. This gives me some bed-time reading.



From lasses_weil at klapptsowieso.net  Thu Sep 13 12:28:32 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Thu, 13 Sep 2007 18:28:32 +0200
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <1189699510.244755.85080@r34g2000hsd.googlegroups.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189604018.520338.162520@57g2000hsv.googlegroups.com>
	<mailman.486.1189693844.2658.python-list@python.org>
	<13eim00ha4lf356@corp.supernews.com>
	<1189699510.244755.85080@r34g2000hsd.googlegroups.com>
Message-ID: <46e96530$0$7702$9b4e6d93@newsspool2.arcor-online.net>

Charles Fox wrote:
> Maybe for now I will just fix up my emacs to display the world 'self'
> in 10% gray...   :-)
> 
> 
Now *that* is a clever idea! (And that's no irony.)

/W


From laurent.pointal at limsi.fr  Wed Sep 19 04:06:51 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Wed, 19 Sep 2007 10:06:51 +0200
Subject: Extracting xml from html
In-Reply-To: <1190144020.294613.167800@57g2000hsv.googlegroups.com>
References: <1190061079.025479.129070@w3g2000hsg.googlegroups.com>
	<46EF769E.4080103@web.de>
	<1190144020.294613.167800@57g2000hsv.googlegroups.com>
Message-ID: <fcqlaq$5ip$1@news2.u-psud.fr>

kyosohma at gmail.com a ?crit :
> On Sep 18, 1:56 am, Stefan Behnel <stefan.behnel-n05... at web.de> wrote:
>> kyoso... at gmail.com wrote:
>>> I am attempting to extract some XML from an HTML document that I get
>>> returned from a form based web page. For some reason, I cannot figure
>>> out how to do this.
>>> Here's a sample of the html:
>>> <html>
>>> <body>
>>> lots of screwy text including divs and spans
>>> <Row status="o">
>>>     <RecordNum>1126264</RecordNum>
>>>     <Make>Mitsubishi</Make>
>>>     <Model>Mirage DE</Model>
>>> </Row>
>>> </body>
>>> </html>
>>> What's the best way to get at the XML? Do I need to somehow parse it
>>> using the HTMLParser and then parse that with minidom or what?
>> lxml makes this pretty easy:
>>
>>    >>> parser = etree.HTMLParser()
>>    >>> tree = etree.parse(the_file_or_url, parser)
>>
>> This is actually a tree that can be treated as XML, e.g. with XPath, XSLT,
>> tree iteration, ... You will also get plain XML when you serialise it to XML:
>>
>>    >>> xml_string = etree.tostring(tree)
>>
>> Note that this doesn't add any namespaces, so you will not magically get valid
>> XHTML or something. You could rewrite the tags by hand, though.
>>
>> Stefan
> 
> I got it to work with lxml. See below:
> 
> def Parser(filename):
>     parser = etree.HTMLParser()
>     tree = etree.parse(r'path/to/nextpage.htm', parser)
>     xml_string = etree.tostring(tree)
>     events = ("recordnum", "primaryowner", "customeraddress")
>     context = etree.iterparse(StringIO(xml_string), tag='')
>     for action, elem in context:
> 	tag = elem.tag
> 	if tag == 'primaryowner':
>             owner = elem.text
>         elif tag == 'customeraddress':
>             address = elem.text
>         else:
>             pass
> 
>     print 'Primary Owner: %s' % owner
>     print 'Address: %s' % address
> 
> Does this make sense? It works pretty well, but I don't really
> understand everything that I'm doing.
> 
> Mike
> 

Q? Once you get your document into an XML tree in memory, while do you 
go to event-based handling to extract your data ?

Try to directly manipulate the tree.

parser = etree.HTMLParser()
tree = etree.parse(r'path/to/nextpage.htm', parser)
myrows = tree.findall(".//Row")

# Then work with the sub-elements.
for r in myrows :
	rnumelem = r.find("RecordNum")
	makeeleme = r.find("Make")
	modelelem = r.find("Model")

& co.



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Sep 10 07:39:34 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 10 Sep 2007 13:39:34 +0200
Subject: Enum class with ToString functionality
References: <1189416537.050002.61120@r34g2000hsd.googlegroups.com>
Message-ID: <5kkonmF49338U2@mid.individual.net>

 bg_ie at yahoo.com wrote:
> I have the following class -
> 
> class TestOutcomes:
>     PASSED = 0
>     FAILED = 1
>     ABORTED = 2
> 
> plus the following code -
> 
> testResult = TestOutcomes.PASSED
> 
> testResultAsString
> if  testResult == TestOutcomes.PASSED:
>     testResultAsString = "Passed"
> elif testResult == TestOutcomes.FAILED :
>     testResultAsString = "Failed"
> else:
>     testResultAsString = "Aborted"
> 
> But it would be much nicer if I had a function to covert to string
> as part of the TestOutcomes class. How would I implement this?

Why don't use the simple approach like this?

TEST_PASSED = "Passed"
TEST_FAILED = "Failed"
TEST_ABORTED = "Aborted"

In Python, no one forces you to put everything in classes.

If you are determined to use the class approach, use the __str__
method. It's called when you do str(instance).

Regards,


Bj?rn

-- 
BOFH excuse #122:

because Bill Gates is a Jehovah's witness and so nothing can work on
St. Swithin's day.



From dontknowwhy88 at yahoo.com  Sat Sep  8 18:50:47 2007
From: dontknowwhy88 at yahoo.com (dontknowwhy88)
Date: Sat, 8 Sep 2007 15:50:47 -0700 (PDT)
Subject: help -  error when trying to call super class method
Message-ID: <584090.28836.qm@web51105.mail.re2.yahoo.com>


I am trying to extend list class to build a stack class -- see code below---
but I got an error when I try to call len method from list class here.. why?
Thanks in advance!
---------------------

class Stackx(list):
       
  def push(self,x):      
      indx= super.len(x)
      self.insert(my_len+1,x) 
      
  def pop(self):
      return self[-1]
     
def test():
    
    myStack = Stackx([1, 2 ,3 ,4])
    print myStack
    myStack.push(9)
    print myStack
    print myStack.pop()
    

if __name__=='__main__':
    test()


'''

Traceback (most recent call last):
  File "C:\Python25\Stack2.py", line 20, in <module>
    test()
  File "C:\Python25\Stack2.py", line 14, in test
    myStack.push(9)
  File "C:\Python25\Stack2.py", line 4, in push
    indx= super.len(x)
AttributeError: type object 'super' has no attribute 'len'
'''

       
---------------------------------
Be a better Heartthrob. Get better relationship answers from someone who knows.
Yahoo! Answers - Check it out. 
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From lakhotia.hariom at gmail.com  Tue Sep 18 02:35:36 2007
From: lakhotia.hariom at gmail.com (Hariom lakhotia)
Date: Tue, 18 Sep 2007 12:05:36 +0530
Subject: header intact
Message-ID: <36e114fe0709172335k14b32631vd6ec5d3ddc9ad5bd@mail.gmail.com>

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Date: 17 Sep 2007 18:41
Subject: Your confirmation is required to join the Python-list mailing list
To: lakhotia.hariom at gmail.com

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From f.guerrieri at gmail.com  Fri Sep 28 14:21:15 2007
From: f.guerrieri at gmail.com (Francesco Guerrieri)
Date: Fri, 28 Sep 2007 20:21:15 +0200
Subject: Python 3.0 migration plans?
In-Reply-To: <1191002679.569709.16870@22g2000hsm.googlegroups.com>
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<1190968707.799398.232550@19g2000hsx.googlegroups.com>
	<5m4126FbgjabU1@mid.uni-berlin.de>
	<1190993122.979034.305060@50g2000hsm.googlegroups.com>
	<mailman.1236.1190995515.2658.python-list@python.org>
	<1190997769.002795.59450@57g2000hsv.googlegroups.com>
	<5m4qc2Fbbk19U1@mid.uni-berlin.de>
	<1191000394.828693.285210@k79g2000hse.googlegroups.com>
	<mailman.1239.1191002287.2658.python-list@python.org>
	<1191002679.569709.16870@22g2000hsm.googlegroups.com>
Message-ID: <79b79e730709281121y64f05186vb56b37a387ae7893@mail.gmail.com>

On 9/28/07, TheFlyingDutchman <zzbbaadd at aol.com> wrote:
> On Sep 28, 10:57 am, Steve Holden <st... at holdenweb.com> wrote:
> > This is like listening to a four-year-old torment its parents with
> > incessant questions. Do you *have* to ask every question that pops into
> > your mind?
> >
>
> In this case I asked it as part of the original question and it was
> ignored. I have programmed in C and C++ and a little Pascal many years
> ago. I don't remember anything about Higher Order Functions and would
> like to see exactly how you do it and to verify the contention.


You could just google for it. Just in case your connection to google
or other similar search engines has been disabled for some reason,
here are some links.

Try for instance

http://okmij.org/ftp/c++-digest/Lambda-CPP-more.html#Ex3

or

http://www.cc.gatech.edu/~yannis/fc++/

or

http://www.boost.org/libs/mpl/doc/tutorial/higher-order.html

francesco


From inq1ltd at inqvista.com  Wed Sep 12 14:35:34 2007
From: inq1ltd at inqvista.com (jim-on-linux)
Date: Wed, 12 Sep 2007 14:35:34 -0400
Subject: Tkinter pack difficulty
In-Reply-To: <1189617737.700363.187450@g4g2000hsf.googlegroups.com>
References: <1189617737.700363.187450@g4g2000hsf.googlegroups.com>
Message-ID: <200709121435.34453.inq1ltd@inqvista.com>

On Wednesday 12 September 2007 13:22, Simon Forman wrote:
> Hi all,
>
> I realize this is more of a Tk question than a python one, but
> since I'm using python and don't know Tcl/Tk I figured I'd ask here
> first before bugging the Tcl folks.
>
> I am having a terrible time trying to get a pack() layout working.
>
> I have three frames stacked top to bottom and stretching across the
> master window from edge to edge.
>
> Crude ASCII Art rendition of the frames:
>
> ============
>
> |  header  |
>
> ------------
>
> |   body   |
>
> ------------
>
> |   log    |
>
> ============
>
>
> I want the header and log frames to have a fixed height (and stick
> to the top and bottom, respectively, of the master frame) and the
> body frame to expand to fill the rest of the space, for instance if
> the window is maximized.
>
> Here is a simple script that /almost/ does what I want.   I've been
> tweaking the pack() options for three hours and I just can't seem
> to get the effect I want.  This /can't/ really be this hard can it?
>
> If you run the script, be aware that since there are only frame
> widgets the window will initially be very very tiny.  If you expand
> or maximize the window you'll see a thin black frame at the top,
> yay, a thin white frame at the bottom, yay, but the middle grey
> "body" frame will NOT span the Y axis, boo.
>
> It's there, and stretches from side to side, but it refuses to
> stretch top to bottom.  Adding a widget (say, a Text) doesn't help,
> the light grey non-frame rectangles remain.
>
> My investigations seem to indicate that the light grey bars are
> part of something the Tk docs call a "parcel" that each slave
> widget gets packed into.  Apparently the "header" and "log" frames
> don't use their entire parcels, but I don't know how to get the
> parcels themselves to "shrinkwrap" to the size of the actual Frame
> widgets.
>
> In any event,  my head's sore and I'm just about ready to take out
> some graph paper and use the grid() layout manager instead.  But I
> really want the automatic resizing that the pack() manager will do,
> rather than the static layout grid() will give me.
>
> Any thoughts or advice?

Sorry I can't help you with pack, I don't use it anymore.

I am able to do everything with grid that I can do with pack.
Once I learned to use grid I liked it better than pack.
Spend some time to learn grid you may like it.
I'm sure others will disagree, but for me it works for everything I 
need.

jim-on-linux
http://inqvista.com  
  


>
> Thanks in advance,
> ~Simon
>
> # Tkinter script
> from Tkinter import *
>
> t = Tk()
>
> header = Frame(t, bg="black", height=10)
> header.pack(expand=1, fill=X, side=TOP, anchor=N)
>
> body = Frame(t, bg="grey")
> body.pack(expand=1, fill=BOTH, anchor=CENTER)
>
> log = Frame(t, bg="white", height=10)
> log.pack(expand=1, fill=X, side=BOTTOM, anchor=S)
>
> t.mainloop()


From kyosohma at gmail.com  Wed Sep 19 10:08:12 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 19 Sep 2007 07:08:12 -0700
Subject: Extracting xml from html
In-Reply-To: <46F0DA24.5030000@web.de>
References: <1190061079.025479.129070@w3g2000hsg.googlegroups.com>
	<46EF769E.4080103@web.de>
	<1190144020.294613.167800@57g2000hsv.googlegroups.com>
	<46F0DA24.5030000@web.de>
Message-ID: <1190210892.719313.51680@22g2000hsm.googlegroups.com>

On Sep 19, 3:13 am, Stefan Behnel <stefan.behnel-n05... at web.de> wrote:
> kyoso... at gmail.com wrote:
> > Does this make sense? It works pretty well, but I don't really
> > understand everything that I'm doing.
>
> > def Parser(filename):
>
> It's uncommon to give a function a capitalised name, unless it's a factory
> function (which this isn't).
>

Yeah. I was going to use a class (and I still might), so that's how it
got capitalized.


> >     events = ("recordnum", "primaryowner", "customeraddress")
>
> You're not using this anywhere below, so I assume this is left-over code.
>

I realized I didn't need that line soon after I posted. Sorry about
that!


> You could do this more easily in a couple of ways. One is to use XPath:
>
>    print [el.text for el in tree.xpath("//primaryowner|//customeraddress")]
>

This works quite well. Wish I'd thought of it.

> Note that this works directly on the tree that you retrieved right in the
> third line of your code.
>
> Another (and likely simpler) solution is to first find the "Row" element and
> then start from that:
>
>    row = tree.find("//Row")
>    print row.findtext("primaryowner")
>    print row.findtext("customeraddress")
>

I tried this your way and Laurent's way and both give me this error:

AttributeError: 'NoneType' object has no attribute 'findtext'


> See the lxml tutorial on this, as well as the documentation on XPath support
> and tree iteration:
>
> http://codespeak.net/lxml/xpathxslt.html#xpathhttp://codespeak.net/lxml/api.html#iteration
>
> Hope this helps,
> Stefan

I'm not sure what George's deal is. I'm not a beginner with Python,
just with lxml. I don't have all the hundreds of modules of Python
memorized and I have yet to meet any one who does. Even if I had used
Beautiful Soup, my code would probably still suck and I was told
explicitly by my boss to avoid adding new dependencies to my programs
whenever possible.

Thanks for the help. I'll add the list comprehension to my code.

Mike



From bignose+hates-spam at benfinney.id.au  Thu Sep 27 22:47:38 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 28 Sep 2007 12:47:38 +1000
Subject: getopt with negative numbers?
References: <1190913250.198794.269530@k79g2000hse.googlegroups.com>
	<fdgpic$ssu$00$1@news.t-online.com>
	<1190915197.390247.313590@57g2000hsv.googlegroups.com>
	<fdgri5$ssu$00$2@news.t-online.com>
	<mailman.1182.1190917341.2658.python-list@python.org>
	<1190930134.780005.68510@22g2000hsm.googlegroups.com>
	<mailman.1196.1190937544.2658.python-list@python.org>
	<1190944143.521085.66910@g4g2000hsf.googlegroups.com>
Message-ID: <871wcj4ib9.fsf@benfinney.id.au>

Casey <Caseyweb at gmail.com> writes:

> Well, it is a hack and certainly not as clean as having getopt or
> optparse handle this natively (which I believe they should).

I believe they shouldn't because the established interface is that a
hyphen always introduced an option unless (for those programs that
support it) a '--' option is used, as discussed.

> But I think it is a simple and clever hack and still allows getopt
> or optparse to function normally.

Except that they *don't* function normally under that hack; they
function in a way contradictory to the normal way.

> So I wouldn't call it a kludge, which implies a more clumsy hack. As
> you say, it is all a matter of perspective.

Everyone is entitled to their own perspective, but not to their own
facts.

-- 
 \      "[...] a Microsoft Certified System Engineer is to information |
  `\     technology as a McDonalds Certified Food Specialist is to the |
_o__)                               culinary arts." ?Michael Bacarella |
Ben Finney


From jcarlson at uci.edu  Sun Sep 30 21:08:59 2007
From: jcarlson at uci.edu (Josiah Carlson)
Date: Sun, 30 Sep 2007 18:08:59 -0700
Subject: ANN: PyPE 2.8.8
Message-ID: <20070930180834.8557.JCARLSON@uci.edu>


=== What is PyPE? ===
PyPE (Python Programmers' Editor) was written in order to offer a
lightweight but powerful editor for those who think emacs is too much
and idle is too little. Syntax highlighting is included out of the box,
as is multiple open documents via tabs.

Beyond the basic functionality, PyPE offers an expandable source tree,
filesystem browser, draggable document list, todo list, filterable
function list, find and replace bars (no dialog to find or replace simple
strings), recordable and programmable macros, spell checker,
reconfigurable menu hotkeys, triggers, find in files, external process
shells, and much more.

=== More Information ===

If you would like more information about PyPE, including screenshots,
where to download the source or windows binaries, bug tracker, contact
information, or a somewhat complete listing of PyPE's features, visit
PyPE's home on the web:

    http://pype.sf.net/index.shtml

If you have any questions about PyPE, please contact me, Josiah Carlson,
aka the author of PyPE, at jcarlson at uci.edu (remember to include
"PyPE" in the subject).


PyPE 2.8.7 includes the following changes and bugfixes since release
2.8.5:

#-------------------------------- PyPE 2.8.8 ---------------------------------
(fixed) a bug related to realtime parsing of non-ascii Python source.


#-------------------------------- PyPE 2.8.7 ---------------------------------
(fixed) some bugs related to the parsers module movement.
(fixed) ordering of user profile path discovery to not break when confronted
with insane 'HOME' environment variable on Windows (will use USERPROFILE or
HOMEDRIVE/HOMEPATH first).
(fixed) unrepr mechansim can now handle negative value storage for disabled
realtime options, etc.


#-------------------------------- PyPE 2.8.6 ---------------------------------
(fixed) a bug with "Wrap Try/Except" as per emailed bug report from Ian York.
(added) ability to choose what port PyPE will listen on via --port= .
(fixed) workspaces in wxPython 2.8+, patch thanks to Craig Mahaney.
(added) explicit exclude dirs for find in files, patch thanks to Craig
Mahaney.
(added) paste and down mechanism to paste and move the cursor down, patch
thanks to Craig Mahaney.
(added) delete right mechanism to delete everything from the cursor to the end
of the line, patch thanks to Craig Mahaney.
(added) delete line mechanism to delete the current line, patch thanks to
Craig Mahaney.
(added) paste rectangle command for rectangular pasting, patch thanks to Craig
Mahaney.
(fixed) support for alternate background colors thanks to bug report from
Craig Mahaney.
(added) macro support to Craig Mahaney's added functionality.
(added) implementation for regular expression replacements, possibly to be
integrated as part of a 'replace in all open documents' in the future.
(added) automatic spellcheck for text and tex documents of up to 200,000 byes
in size.  Will only spellcheck if the user has enabled "check syntax" in the
"Realtime Options".
(fixed) issue when trying to save language settings when cursor position is
not to be saved.
(added) support for \chapter section delimiter in *tex files.
(fixed) issue that prevented the highest level source listing from being
sorted in the Name and Line sorted source trees.
(changed) rather than reading and executing a file for configuration loading,
we now use a variant of the 'unrepr()' mechanism with support for True/False.
(changed) find/replace bar now uses variant of 'unrepr()' rather than the
compiler module directly.
(changed) moved parsers.py to plugins and stopped using import * to get its
contents.


From grante at visi.com  Thu Sep 20 22:37:52 2007
From: grante at visi.com (Grant Edwards)
Date: Fri, 21 Sep 2007 02:37:52 -0000
Subject: A struct for 2.4 that supports float's inf and nan?
References: <mailman.784.1190235594.2658.python-list@python.org>
	<1190315989.268629.37520@22g2000hsm.googlegroups.com>
	<mailman.826.1190317807.2658.python-list@python.org>
Message-ID: <13f6bk0ev35l212@corp.supernews.com>

On 2007-09-20, Joshua J. Kugler <joshua at eeinternet.com> wrote:

>> import struct
>> 
>> pack_double_workaround = {
>>   'inf': struct.pack('Q', 0x7ff0000000000000L),
>>   '-inf': struct.pack('Q', 0xfff0000000000000L),
>>   'nan': struct.pack('Q', 0x7ff8000000000000L)
>> }
>> 
>> def pack_one_safe(f, a):
>>   if f == 'd' and str(f) in pack_double_workaround:
>>       return pack_double_workaround[str(f)]
>>   return struct.pack(f, a)
>>
>> def pack(fmt, *args):
>>   return ''.join(pack_one_safe(f, a) for f, a in zip(fmt, args))

NB: the strings returned by str() when passed a NaN or Inf are
system dependent and aren't guaranteed to be consistent from
one day to the next unless you've overridden the floating point
object's __repr__ method to make sure.
    
>> Unpacking is similar: unpack doubles with 'Q' and test the
>> long for equality with +-inf, and find nan's by checking bits
>> 52 to 62. If the number's ok, unpack again using 'd'.

Here are the tests I use for 32-bit work:

def isNaN(u):
    return ((u & 0x7f800000) == 0x7f800000) and (u & 0x7fffff)
def isInf(u):
    return ((u & 0x7f800000) == 0x7f800000) and ((u & 0x7fffff)==0)
def isNeg(u):
    return (u & 0x80000000)

>> You can get python values for nan, -inf and inf by using
>> float('nan'), float('-inf'), float('inf').
>> 
>> I've not been able to properly test this, as struct seems
>> to work fine in Python 2.3 and 2.4 on MacOS X.
>
> Thanks for the ideas, Paul!  I came up with something that
> works for me, but this has a few ideas that I'm going to
> implement in my wrapper to make for cleaner code.
>
> As to testing it on MacOS X: yeah, it can be a somewhat
> system-dependent problem,

It shouldn't be, but unfortunately it is.  If you're careful,
you can come up with something that's fairly portable (I've got
a wrapped pickle/unpickle that's nan/inf aware and works on
both Win32 and Linux.  Holler if you want it.

> Thanks for the tips!


-- 
Grant Edwards                   grante             Yow!  I Know A Joke!!
                                  at               
                               visi.com            


From paul.hankin at gmail.com  Tue Sep 25 15:28:29 2007
From: paul.hankin at gmail.com (Paul Hankin)
Date: Tue, 25 Sep 2007 19:28:29 -0000
Subject: sorteddict PEP proposal [started off as orderedict]
In-Reply-To: <2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
References: <1190710402.481693.5110@50g2000hsm.googlegroups.com>
	<1190719164.587009.206340@19g2000hsx.googlegroups.com>
	<1190721061.573653.304110@r29g2000hsg.googlegroups.com>
	<1190744523.025029.227690@k79g2000hse.googlegroups.com>
	<2O-dnYn-b87Gx2TbnZ2dnUVZ_j-dnZ2d@comcast.com>
Message-ID: <1190748509.786571.124150@n39g2000hsh.googlegroups.com>

On Sep 25, 7:58 pm, Steven Bethard <steven.beth... at gmail.com> wrote:
> > Paul Hankin wrote:
> > ...
> > class sorteddict(dict):
> >     "A sorted dictionary"
> >     def __init__(self, arg=None, cmp=None, key=None, reverse=False):
> >         if arg:
> >     ...
>
> With this is the implementation, I'm definitely -1. Not because it's a
> bad implementation, but because if the iteration is always doing a sort,
> then there's no reason for a separate data structure. Just use sorted()
> directly on a regular dict. That has the advantage of being much more
> obvious about where the expensive operations are::
>
>      for key in sorted(d, ...):
>          ... whatever you want to do ...
>
> IMHO, the only reason to introduce a sorteddict() is if it minimizes the
> cost of sorting the keys.

I disagree with your reason for introducing a sorteddict - the main
reason should be if it makes code that uses it simpler and more
readable, with efficiency (within reasonable limits) being of
secondary importance. Unfortunately for sorteddict, your code is
simpler and more explicit for most obvious use cases.

But, with Bill's cached sorted key list it'll be reasonably efficient,
and it's likely possible to update the sorted cache more efficiently
than resorting if there's only been a small number of insertions since
the last sort, but I haven't the time to do a thorough job.

--
Paul Hankin



From nytrokiss at gmail.com  Sat Sep 29 23:30:30 2007
From: nytrokiss at gmail.com (James Matthews)
Date: Sat, 29 Sep 2007 20:30:30 -0700
Subject: Simple threading example freezes IDLE?
In-Reply-To: <1190891894.679630.202880@w3g2000hsg.googlegroups.com>
References: <1190218626.334442.255450@57g2000hsv.googlegroups.com>
	<f1aa6d810709261450k575cf5b6s90615fc98a61eb1f@mail.gmail.com>
	<f1aa6d810709261600u6a7d1970q26d367ebf6ad01b3@mail.gmail.com>
	<mailman.1142.1190847709.2658.python-list@python.org>
	<1190891894.679630.202880@w3g2000hsg.googlegroups.com>
Message-ID: <8a6b8e350709292030g77bc9165k8d26d5c6c7d7974f@mail.gmail.com>

idle doesn't work well with threads

On 9/27/07, 7stud <bbxx789_05ss at yahoo.com> wrote:
>
> On Sep 26, 5:01 pm, "Sergio Correia" <sergio.corr... at gmail.com> wrote:
> >
> > I'm using IDLE 1.2.1, Python 2.5.1, and Tk 8.4. Does anyone has any
> > idea of why is this happening?
> >
>
> Two mainloops == bad.  IDLE == 1 mainloop.  your program == 1
> mainloop.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
http://www.goldwatches.com/mens/cufflinks.html
http://www.jewelerslounge.com
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From aleax at mac.com  Wed Sep  5 00:31:57 2007
From: aleax at mac.com (Alex Martelli)
Date: Tue, 4 Sep 2007 21:31:57 -0700
Subject: list index()
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>
	<87hcmhebwv.fsf@benfinney.id.au> <5jn9qgFdmbcU3@mid.uni-berlin.de>
	<1188886461.236237.168230@y42g2000hsy.googlegroups.com>
	<mailman.17.1188896543.2658.python-list@python.org>
	<slrnfdqina.1v8.horpner@FIAD06.norwich.edu>
Message-ID: <1i3xpi1.zigmxd1cq2466N%aleax@mac.com>

Neil Cerutti <horpner at yahoo.com> wrote:

> It's probable that a simpler implementation using slice
> operations will be faster for shortish lengths of subseq. It was
> certainly easier to get it working correctly. ;)
> 
> def find(seq, subseq):
>   for i, j in itertools.izip(xrange(len(seq)-len(subseq)),
>                              xrange(len(subseq), len(seq))):
>     if subseq == seq[i:j]:
>       return i
>   return -1

Simpler yet (though maybe slower!-):

def find(seq, subseq):
    L = len(subseq)
    for i in xrange(0, len(seq)-L):
        if subseq == seq[i:i+L]: return i
    return -1

also worth trying (may be faster in some cases, e.g. when the first item
of the subsequence occurs rarely in the sequence):

def find(seq, subseq):
    L = len(subseq)
    firstitem = subseq[0]
    end = len(seq) - len(subseq)
    i = -1
    while 1:
        try: i = seq.index(firstitem, i+1, end)
        except ValueError: return -1
        if subseq == seq[i:i+L]: return i

For particularly long sequences (with hashable items) it might even be
worth trying variants of Boyer-Moore, Horspool, or Knuth-Morris-Pratt;
while these search algorithms are mostly intended for text strings,
since you need tables indexed by the item values, using dicts for such
tables might yet be feasible (however, the program won't be quite that
simple).  Benchmarking of various possibilities on typical input data
for your application is recommended, as performance may vary!


Alex


From jstroud at mbi.ucla.edu  Sat Sep 15 18:20:45 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sat, 15 Sep 2007 15:20:45 -0700
Subject: Needless copying in iterations?
In-Reply-To: <1189893977.487320.231700@n39g2000hsh.googlegroups.com>
References: <fchk59$mm3$1@daisy.noc.ucla.edu>
	<1189893977.487320.231700@n39g2000hsh.googlegroups.com>
Message-ID: <fchlff$ni4$1@daisy.noc.ucla.edu>

buffi wrote:
> On Sep 15, 11:58 pm, James Stroud <jstr... at mbi.ucla.edu> wrote:
>> Hello all,
>>
>> I was staring at a segment of code that looked like this today:
>>
>>     for something in stuff[x:y]:
>>       whatever(something)
>>
>> and was wondering if the compiler really made a copy of the slice from
>> stuff as the code seems to suggest, or does it find some way to produce
>> an iterator without the need to make a copy (if stuff is a built-in
>> sequence type)? Or would it be more efficient to do the more clumsy (in
>> my opinion):
>>
>>     for i in xrange(x, y):
>>       whatever(stuff[i])
>>
>> James
> 
> itertools.islice does what you want
> 
> import itertools
> for something in itertools.islice(stuff, x, y):
>       whatever(something)
> 

Thanks buffi!

So I guess the interpreter does no optimization in the latter?

James


From brenNOSPAMbarn at NObrenSPAMbarn.net  Thu Sep 20 12:56:55 2007
From: brenNOSPAMbarn at NObrenSPAMbarn.net (OKB (not okblacke))
Date: Thu, 20 Sep 2007 16:56:55 GMT
Subject: super() doesn't get superclass
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au>
	<87k5qn5cwi.fsf@mulj.homelinux.net>
	<87y7f2w0xj.fsf@benfinney.id.au>
	<13f3pbfh7to7k4b@corp.supernews.com>
	<873axavwhi.fsf@benfinney.id.au>
	<13f3t11ql8s5c16@corp.supernews.com>
Message-ID: <Xns99B165206F2EAOKB@199.45.49.11>

Steven D'Aprano wrote:

> class super(object)
> |  super(type) -> unbound super object
> |  super(type, obj) -> bound super object; requires isinstance(obj,
> |  type) super(type, type2) -> bound super object; requires
> |  issubclass(type2, type) Typical use to call a cooperative
> |  superclass method: class C(B):
> |      def meth(self, arg): super(C, self).meth(arg)

    	. . . but from the documentation on the website:

super(type[, object-or-type])
    Return the superclass of type.

    	I do think this should be changed, since it really isn't true.  It 
should probably say something like "return the next element after "type" 
in the MRO of "element-or-type".

-- 
--OKB (not okblacke)
Brendan Barnwell
"Do not follow where the path may lead.  Go, instead, where there is
no path, and leave a trail."
	--author unknown


From bignose+hates-spam at benfinney.id.au  Wed Sep 26 20:05:59 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 27 Sep 2007 10:05:59 +1000
Subject: Packaging and dependencies
References: <87ejgmklep.fsf@benfinney.id.au> <878x6ukkvq.fsf@benfinney.id.au>
	<5luhb0Faal8aU1@mid.uni-berlin.de>
	<87zlz9kfw3.fsf_-_@benfinney.id.au>
	<mailman.1112.1190814145.2658.python-list@python.org>
Message-ID: <87ve9x55w8.fsf@benfinney.id.au>

Steve Holden <steve at holdenweb.com> writes:

> Ben Finney wrote:
> > So, if fifteen different programs depend on library X, we'd have
> > fifteen *separate* installations of library X on the same machine?
> >
> You need to get your opinions up to date. Fifteen copies of a single
> library is nothing in terms of the code bloat that has happened over
> the last forty years, and most of that bloat is for programmer
> convenience, either in package development or distribution.

Thanks for the straw man, but I'll decline.

The issue with multiple copies of the same library is *not* disk
storage bloat, but violation of DRY: Don't Repeat Yourself. When the
above putative library X is found to have a bug and needs to be
upgraded to fix, it's wasteful of resources to have to track down
*every* instance of that library, in all the places where separate
packages expect to find it ? and it's a recipe for omitting one or
several of those multiple instances, thus getting hard-to-track errors
in code that *should* exist in one place on the system.

> While it's all very well to say that there should only ever be one
> true version of a library this requires that developers constrain
> themselves (sometimes in ways they consider unreasonable) to
> backwards compatibility for the entire lifetime of their code.

Not at all. If the package management system is designed well ? like
in most modern operating systems ? new versions can be installed, and
even relied upon by multiple packages, while the old one stays on the
system for those packages that still haven't migrated to the new. The
foolish part is to have multiple copies of the *same* code scattered
around the system, with different packages looking for the same code
in different places.

> > And when it comes time to upgrade library X because a security
> > flaw is discovered, each of the fifteen instances must be upgraded
> > separately?
> >
> Yes. Better than upgrading a single library shared between fifteen
> applications and having two of them break.

Then allow the old library to stay on the system, in *one* single,
known location, for the applications that need it; and the new library
in *its* single known location for the applications that use it.

> Agreed, but until we reach the ideal situation where everybody is
> using the same package dependency system what's your practical
> solution?

The above benefits don't require "everybody is using the same package
dependency system". They accrue one machine at a time, by making *that
machine* less prone to the redundancy problems mentioned above.

They also are incremental, and are beneficial to move towards; that
is, even if the machine is using several package management systems,
any movement towards unifying the package management is a reduction in
duplication and hence a reduction in the associated problems.

> "Self-contained" has the merit that nobody else's changes are going
> to bugger about with my application on a customer's system.

That's nice for you, the programmer. Package management and proper
dependency declaration is a benefit to the customer (the one who owns
the machine, not the programmer) since they can upgrade each package
*once* per machine, and not have to hunt down all the places where a
previous version may still be installed simply because it was
convenient for the programmer.

Yes, this requires good management of APIs for libraries on the part
of the programmers of those libraries, and ensuring that a new version
with the same API maintains its expected behaviour. It also requires
that the programmer depending on those libraries declares dependencies
properly. It's working fine for many operating systems ? even in the
absence of a universal package management system.

> The extra disk space is a small price to pay for that guarantee.

Hopefully you can discard this straw man argument and engage the
actual problems of redundant installations of identical code packages.

-- 
 \            "It's not what you pay a man, but what he costs you that |
  `\                                          counts."  -- Will Rogers |
_o__)                                                                  |
Ben Finney


From steve at holdenweb.com  Tue Sep 11 19:55:30 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 11 Sep 2007 19:55:30 -0400
Subject: common/static code
In-Reply-To: <ed5105470709111537g21f3f356r827f3a0994989dfb@mail.gmail.com>
References: <ed5105470709111537g21f3f356r827f3a0994989dfb@mail.gmail.com>
Message-ID: <46E72AF2.1090908@holdenweb.com>

brien colwell wrote:
> hey all,
> 
> I have a slew of functions that are shared across several scripts. 
> What's the best way to factor them out into a single location?
> 
> many thanks
> 

Define the functions in a module (e.g. myModule.py) then import them as

from myModule inport fun1, fun2, fun3

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From baires.lrossi at gmail.com  Sat Sep 29 15:32:40 2007
From: baires.lrossi at gmail.com (lukio)
Date: Sat, 29 Sep 2007 12:32:40 -0700
Subject: CaFeCONF 2007 6tas. Conferencias Abiertas de Software Libre y
	GNU/Linux
Message-ID: <1191094360.381795.271720@22g2000hsm.googlegroups.com>

We are going to have a few speeches about python language.

http://www.cafeconf.org/2007/modules/myconference/program.php?cid=1&programord=1

cheers,

CaFeCONF 2007
6tas. Conferencias Abiertas de Software Libre y GNU/Linux (CaFeCONF)
http://www.cafeconf.org

Est? abierta la inscripci?n para participar de las 6tas. Conferencias
Abiertas de Software Libre y GNU/Linux CaFeCONF 2007, organizadas por
el
Grupo de Usuarios de Software Libre de Capital Federal (CaFeLUG), a
realizarse los d?as *5 y 6 de Octubre* en la sede de la Universidad
Argentina de la Empresa *(UADE), Lima 717*, Ciudad de Buenos Aires,
Argentina.

Con m?s de 70 charlas, talleres y conferencias, CaFeCONF es un evento
de difusi?n y capacitaci?n donde expertos, entusiastas y usuarios
exponen, comparten, difunden, debaten y se capacitan en una amplia
gama
de tem?ticas relacionadas al uso y desarrollo de Software Libre.

Este a?o contamos con el apoyo de Google, Red Hat, el Proyecto
Fedora,
Globant, Intel y tecso entre nuestros sponsors.

Contaremos con la participaci?n de Enrique Chaparro como keynote del
evento. Y una nueva edici?n de Aulas Libres, el evento educativo
co-organizado por Gleducar. Aulas Libres tiene como objetivo ser un
espacio de encuentro entre "educadores libres", un lugar para
reflexionar y debatir sobre las problem?ticas de la educaci?n en
relaci?n a las nuevas tecnolog?as, el Software Libre y la construcci?n
cooperativa de conocimientos.

Pueden visualizar el programa completo del evento:
http://www.cafeconf.org/2007/modules/myconference/program.php?cid=1&programord=1

La participaci?n en CaFeCONF es libre y gratuita.

La acreditaci?n esta disponible y les pedimos para una mejor
coordinaci?n en la mesa de entrada se registren de antemano:
http://www.cafeconf.org/2007/modules/eguide/event.php?eid=1



From andrew.arobert at gmail.com  Sat Sep  1 21:57:03 2007
From: andrew.arobert at gmail.com (andrew.arobert at gmail.com)
Date: Sun, 02 Sep 2007 01:57:03 -0000
Subject: Automation and scheduling of FrontPage publishing using Python
In-Reply-To: <fbb3kv$jk5$1@lust.ihug.co.nz>
References: <1188517723.279932.299400@x40g2000prg.googlegroups.com>
	<fbamnh$r7q$7@lust.ihug.co.nz>
	<mailman.250.1188620292.28954.python-list@python.org>
	<fbb1lr$evf$5@lust.ihug.co.nz>
	<mailman.255.1188630271.28954.python-list@python.org>
	<fbb3kv$jk5$1@lust.ihug.co.nz>
Message-ID: <1188698223.393723.151140@d55g2000hsg.googlegroups.com>

On Sep 1, 3:19 am, Lawrence D'Oliveiro <l... at geek-
central.gen.new_zealand> wrote:
> In message <mailman.255.1188630271.28954.python-l... at python.org>, Steve
>
> Holden wrote:
> > Lawrence D'Oliveiro wrote:
>
> >> If they were using FrontPage extensions, they deserve everything they
> >> get.
>
> > While possibly justifiable, given that FrontPage has had holes you could
> > drive a London double-decker but through since time immemorial, it isn't
> > a terribly helpful observation.
>
> Just to remove any possible doubt: FrontPage must die.
>
> But if you want that expressed in less confrontational, more
> customer-friendly words, how about this:
>
> They need to engage the services of an expensive consultant or two, who will
> bill them lots of hours working out an approach which may involve migrating
> to a technology with better long-term prospects, or simply stitching
> together a Frankenhack or two to eke a bit more life out of their existing
> system, until it finally collapses altogether.
>
> Either way, they need to spend the folding stuff, and lots of it. Asking for
> help on a forum where people are more liable to throw brainpower rather
> than money at problems, is a waste of time.

ROFL.

Yes.. I know all about Front Page's issues and would be one of the
first to say it should be abandoned.

Regrettably it is a situation I have been "drafted" into.

Management knows I do a lot of work with WebSphere MQSeries and
WebSphere Application server.

They saw the "web" in those and figured I would be the perfect
resource for solving their problem.

In any case, convincing management and our so-called web developers to
stop using the extensions is an up-hill struggle at best.

I am working that angle but my expectations are low so I figured I
would pose the question here.



From bignose+hates-spam at benfinney.id.au  Tue Sep 25 23:20:18 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 26 Sep 2007 13:20:18 +1000
Subject: stopping a while True: with the keyboard
References: <mailman.1071.1190769576.2658.python-list@python.org>
	<1190774898.348656.190760@y42g2000hsy.googlegroups.com>
Message-ID: <87ir5ykt8t.fsf@benfinney.id.au>

Benjamin <musiccomposition at gmail.com> writes:

> On Sep 25, 8:19 pm, patrick <pured... at 11h11.com> wrote:
> > hi all,
> >
> > i am looking for a way to break a while True: when pressing "s" on my
> > keyboard. how can i do this?
> >
> > pat
> 
> Ctrl-C

That's not a very helpful response, since it doesn't address the OP's
request.

Patrick, the operating system "interrupt current process" keyboard
signal will cause Python to raise a 'KeyboardInterrupt' exception,
which unless caught will propagate back to the top-level Python
process and exit the program with a traceback.

On most operating systems, you can send this signal to the current
foreground process with the key combination Ctrl+C. I think that's
what Benjamin's laconic response is implying.

As for "detect a specific keypress", there's no OS-independent way to
do that. You'll need to write code that depends on a particular way of
getting at keypresses that won't work on all operating systems.

-- 
 \          "Those who write software only for pay should go hurt some |
  `\              other field."  -- Erik Naggum, in _gnu.misc.discuss_ |
_o__)                                                                  |
Ben Finney


From fakeaddress at nowhere.org  Sun Sep  2 04:18:10 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Sun, 02 Sep 2007 08:18:10 GMT
Subject: How can I wait for all the threads I spawn for 5 minutes
In-Reply-To: <1188603646.671414.272760@w3g2000hsg.googlegroups.com>
References: <1188603646.671414.272760@w3g2000hsg.googlegroups.com>
Message-ID: <6luCi.12918$3x.2065@newssvr25.news.prodigy.net>

herman wrote:

> In my python program, I would to like to spwan 5 threads, for the them
> for 5 minutes maximum and the continue. Here is my script:
> 
>             threads = []
> 
>             for j in range(5):
>                 t = MyThread()
>                 threads.append(t)
> 
>             for t in threads:
>                 t.join(60*5)
>                 print "thread join\n"
> 
>             # wait for 5 minutes for all the threads to complete , and
>             # then continue
> 
> But this code ends up waiting 5 minutes for **each** thread.  that is
> not what I want. I just want to wait for 5 minutes for all threads.
> how can I do that?

Untested:

     from time import time

     deadline = time() + 60*5
     for t in threads:
         t.join(max(0, deadline - time()))


> And after 5 minutes, i want to kill off all the threads I spawn
> earlier, how can I do that in python.

That's harder. Python has no threadicide method, and its
absence is not an oversight. Can you arrange for your threads
to check a flag periodically, or might they be hung? Your
other choice is to end the entire process.


-- 
--Bryan


From cbarton at metavr.com  Tue Sep  4 04:50:24 2007
From: cbarton at metavr.com (Campbell Barton)
Date: Tue, 04 Sep 2007 18:50:24 +1000
Subject: list index()
In-Reply-To: <1188886461.236237.168230@y42g2000hsy.googlegroups.com>
References: <1188456273.102334.48660@50g2000hsm.googlegroups.com>	<87hcmhebwv.fsf@benfinney.id.au>
	<5jn9qgFdmbcU3@mid.uni-berlin.de>
	<1188886461.236237.168230@y42g2000hsy.googlegroups.com>
Message-ID: <46DD1C50.2010202@metavr.com>

Jason wrote:
> On Aug 30, 1:27 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>> On Thu, 30 Aug 2007 17:09:36 +1000, Ben Finney wrote:
>>> zzbba... at aol.com writes:
>>>> What's with the index() function of lists throwing an exception on not
>>>> found?
>>> It's letting you know that the item isn't in the list. There's no
>>> sensible return value from an "index" function in that condition.
>> What about -1?  C programmers do this all the time.  :-)
>>
>> Ciao,
>>         Marc 'BlackJack' Rintsch
> 
> As other people pointed out, C doesn't have exceptions, so a C
> programmer must make an in/out parameter to indicate an error, or have
> a special return value.  In Python, you're most often searching the
> list for an object which is in the list, so the lack of the object is
> an exceptional condition.  You can certain check with the "in"
> operator beforehand to avoid the exception.  You may also subclass a
> list and override the index method, or write a standalone function to
> catch the exception and change its value.
> 
> The reason why the exception is more Pythonic is that the return value
> is always a guaranteed good index into the list.  Any errors
> (including calling .index() on a non-list instance that doesn't have
> a .index method) are exceptional, and should probably follow a very
> different code path.
> 
> Returning -1 is not a good return value to indicate an error.  After
> all, -1 is a valid index in most Python lists.  (Negative numbers
> index from the tail of the list.)
> 
>   --Jason

Agree in general tho its a bit inconsistent how...

"string".find(val)

...can return -1 but .index() cant, though the inconsistency is probably 
with string since most other areas of the py api raise errors in cases 
like this.


From pyth0nc0d3r at gmail.com  Mon Sep 24 13:26:54 2007
From: pyth0nc0d3r at gmail.com (Lamonte Harris)
Date: Mon, 24 Sep 2007 12:26:54 -0500
Subject: Is there some sort of portable IDE?
Message-ID: <eb79828c0709241026q3587ae8ag56ad41b510d4e994@mail.gmail.com>

Like say you don't got python installed, but you want to test code is there
a way?(School)
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From lasses_weil at klapptsowieso.net  Thu Sep 13 15:12:58 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Thu, 13 Sep 2007 21:12:58 +0200
Subject: Python 3K or Python 2.9?
In-Reply-To: <1189708659.784852.285160@22g2000hsm.googlegroups.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<87sl5j5r34.fsf@benfinney.id.au>
	<1189646281.569796.267940@d55g2000hsg.googlegroups.com>
	<87ir6f5mrq.fsf@benfinney.id.au>
	<1189651204.408268.57580@19g2000hsx.googlegroups.com>
	<1i4dddf.piaojwz9lz40N%aleax@mac.com>
	<1189700775.661780.292150@50g2000hsm.googlegroups.com>
	<46e96aaa$0$7685$9b4e6d93@newsspool2.arcor-online.net>
	<1189708659.784852.285160@22g2000hsm.googlegroups.com>
Message-ID: <46e98bba$0$4518$9b4e6d93@newsspool3.arcor-online.net>

TheFlyingDutchman wrote:
>> (Can you tell I'm currently forced to developing in Java? ;) (Which I'm
>> currently avoiding to do, by wasting my time on usenet.))
>>
> 
> Maybe you can sneak Jython into the mix. Just describe it as "this
> Java scripting language".
> 
> 
Hehe, devious idea. I might just try that. :)

/W


From gagsl-py2 at yahoo.com.ar  Wed Sep  5 21:11:08 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 05 Sep 2007 22:11:08 -0300
Subject: python exec behaves inconsistent with respect to module imports
References: <1188997944.162811.33640@r34g2000hsd.googlegroups.com>
	<fbmde0$io2$03$1@news.t-online.com>
	<1189003511.666050.293060@22g2000hsm.googlegroups.com>
Message-ID: <op.tx7j8ugrx6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 05 Sep 2007 11:45:11 -0300, carl.dhalluin at gmail.com  
<carl.dhalluin at gmail.com> escribi?:

> Thank you for the explanation
>
> It seems that python behaves different for variables created in the
> toplevel namespace, versus deeper namespaces.

Yes. Older Python versions had only two scopes: local and global. A name  
was either local or global. Now, there are nested scopes too.
If a name is bound inside a function (by example, an identifier at the  
left hand side of an assignment) it is local to that function (unless the  
global statement is used). The check is made at compile time.
If a name is bound at the module level, it is a global variable.
Names used in a function but defined on an enclosing function are free  
variables.

> CODE:
>
> def g():
>   a=2
>   print "a in LOC:",locals().has_key('a')
>   print "a in GLO:",globals().has_key('a')
>   def f():
>     print "a in LOC:",locals().has_key('a')
>     print "a in GLO:",globals().has_key('a')
>     print a
>   f()
> g()
>
> b=3
> print "b in LOC:",locals().has_key('b')
> print "b in GLO:",globals().has_key('b')
> def h():
>   print "b in LOC:",locals().has_key('b')
>   print "b in GLO:",globals().has_key('b')
>   print b
> h()
>
>
> DISCUSSION:
>
> locals() are passed through from a function to a nested function
> locals() are not passed if you go from top-level to a nested function.

No.
A function (more generally: a code block) can refer to local variables,  
free variables, or global variables.
Local variables are NOT stored in a dictionary, but on a fixed size array,  
and indexed by ordinal instead of name. The compiler knows exactly which  
variables are local at compile time, just looking at the code.
Free variables are accessed thru "cell" objects, which keep a reference to  
the enclosing scope. The compiler knows about free variables too (they are  
local to some enclosing scope). Try adding these lines at the end of g  
function above:

    f()
    a=-1
    f()

Global variables are those in the module where the function is defined  
(plus some built-in names) - they're searched by name at runtime.
Local variables are, uhm, local :) and not "passed" anywhere.

locals() is a dictionary built on-demand. It includes local variables  
*AND* free variables too.
In function f above, there are no local variables, and `a` is a free  
variable.
In function g, `a` and `f` are local variables.
In function h, `b` is a local variable.

> globals() are visible from all levels

Yes, unless an inner scope shadows the name. Putting b=5 at the first line  
on function h above hides the global `b`

> globals() are auto-populated at top level
Yes; global variables are those defined at the module level.
See the Language Reference <http://docs.python.org/ref/naming.html>

> So now get back to my exec code in the previous post. [...] To me this  
> seems a bug in python exec:

Now that you know a bit more about locals and globals, try to understand  
what exec does in your example.
Note that the exec statement has two optional arguments that are used as  
the global and local namespaces: <http://docs.python.org/ref/exec.html>

-- 
Gabriel Genellina



From chris.monsanto at gmail.com  Thu Sep 20 14:50:52 2007
From: chris.monsanto at gmail.com (chris.monsanto at gmail.com)
Date: Thu, 20 Sep 2007 11:50:52 -0700
Subject: Tapping into the access of an int instance
In-Reply-To: <mailman.818.1190308885.2658.python-list@python.org>
References: <mailman.818.1190308885.2658.python-list@python.org>
Message-ID: <1190314252.264152.180750@57g2000hsv.googlegroups.com>

On Sep 20, 1:21 pm, "Tor Erik S?nvisen" <toreri... at gmail.com> wrote:
> Hi,
>
> Does anyone know how to interrupt the lookup of an integer value? I
> know I need to subclass int, since builtin types can't be altered
> directly...
>
> Below is how far I've come... What I want is to tap into the access of
> instance i's value 1...
>
> >>> class Int(int):
>
>         def __init__(self, *a, **k):
>                 super(Int, self).__init__(self, *a, **k)
>
> >>> i = Int(1)
> >>> i
>
> 1
>
> Regards,
> Tor Erik

While I'm not *totally* sure what you are asking, you can access the
first parameter you passed in __init__ via args[0].



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Sep 10 08:42:50 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 10 Sep 2007 14:42:50 +0200
Subject: less obvious "super"
In-Reply-To: <1189424762.591411.99760@d55g2000hsg.googlegroups.com>
References: <1189417830.645749.226120@d55g2000hsg.googlegroups.com>
	<Xns99A77DA03E585duncanbooth@127.0.0.1>
	<1189424762.591411.99760@d55g2000hsg.googlegroups.com>
Message-ID: <46e53bca$0$26733$426a74cc@news.free.fr>

Nagarajan a ?crit :
(snip)
> What's the difference b/w:
>      class A:
> and
>      class A ( object ):
> 

The first one creates a 'classic' (aka 'old-style') class, IOW a class 
using the legacy object-model of Python < 2.2. The second one creates a 
'new-style' class using the new (well... since Python 2.2, which is not 
that new) and far more powerfull object model. Unless you need to 
support antique Python version, there's no good reason IMHO to use 
old-style classes.


From istvan.albert at gmail.com  Fri Sep 21 15:42:52 2007
From: istvan.albert at gmail.com (Istvan Albert)
Date: Fri, 21 Sep 2007 19:42:52 -0000
Subject: Zope review
In-Reply-To: <1190331847.514475.284200@22g2000hsm.googlegroups.com>
References: <1190331847.514475.284200@22g2000hsm.googlegroups.com>
Message-ID: <1190403772.862325.113960@y42g2000hsy.googlegroups.com>

On Sep 20, 7:44 pm, Norm <norman.bar... at gmail.com> wrote:

> without meaning to start a flame war between the various python web
> tools, I was wondering if anyone had a review of the status of Zope.
> For example, is it being used for new projects or just maintenance?

Zope is heavily used. It is a mature and reliable product. It is also
very complicated and requires (enforces) a particular way of
programming that can feel very burdensome if it does not 'fit your
brain'.

i.








From brown at esteem.com  Tue Sep 11 16:07:00 2007
From: brown at esteem.com (Tom Brown)
Date: Tue, 11 Sep 2007 13:07:00 -0700
Subject: Python Database Apps
In-Reply-To: <1189479130.905136.196820@r34g2000hsd.googlegroups.com>
References: <1189479130.905136.196820@r34g2000hsd.googlegroups.com>
Message-ID: <200709111307.00987.brown@esteem.com>

On Monday 10 September 2007 19:52, darien.watkins at gmail.com wrote:
> Kindof a poll, kindof curiosity...
>
> What is your favorite python - database combination?  I'm looking to
> make an app that has a local DB and a server side DB.  I'm looking at
> python and sqlite local side and sql server side.
>
> Any suggestions????

I have had a lot of good luck with PostgreSQL. It is easy to install and use. 
It is also very stable. It maybe overkill for a client side database. The 
psycopg package makes interfacing to PostgreSQL very easy and there is a 
package for Linux and Windows to make cross-platform development a breeze.

-Tom


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Sep 13 03:33:04 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 13 Sep 2007 09:33:04 +0200
Subject: Python 3K or Python 2.9?
In-Reply-To: <1189618530.872819.136450@57g2000hsv.googlegroups.com>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
Message-ID: <46e8e7ab$0$31727$426a74cc@news.free.fr>

TheFlyingDutchman a ?crit :
> On Sep 12, 4:40 am, Bjoern Schliessmann <usenet-
> mail-0306.20.chr0n... at spamgourmet.com> wrote:
>> Ivan Voras wrote:
>>> What does "self" have to do with an object model? It's an
>>> function/method argument that might as well be hidden in the
>>> compiler without ever touching the role it has (if not, why?). I
>>> agree that it's needless noise in a language.
>> If this was needless, why do C++ and Java have the "this" pointer?
>>
> "this" in C++ and Java is not shown in the parameter list, which was
> what he was
> complaining about.  He wants
> 
> class MyClass:
>         def SomeFunction(someParameter):
>            self.someParameter = someParameter
> 
> not
> 
> class MyClass:
>         def SomeFunction(self, someParameter):
>            self.someParameter = someParameter
> 
> 
> The confusing way about the current Python method when you first
> encounter it is
>  why is "self" being passed in when you write the function

At this stage, it's not "passed in", it's declared in the arguments list.

> but not
> when you call it.

It *is* passed when you call the function.

> If the compiler is smart enough to know that

The compiler has absolutely nothing to do with it. It's the object model 
that takes care of this. Quick explanation:

- functions objects implement the descriptor protocol.
- when a function which is an attribute of a class is looked up on an 
instance of that class, the  __get__ method of the function object is 
called with the instance (and class) as arguments.
- this method returns a closure wrapping the instance, the class and the 
function object itself
- when this closure is called, it itself prepends the instance to the 
args it receives, calls the function with these args, and returns the 
result.

This is why you need tho declare the instance as the first argument, but 
don't need to pass it explicitely *when calling the function as a method 
of an object*. Notice that you can still use the function directly, 
passing the instance by yourself. And that you can define a function 
outside a class and then attach it to a class. To make a long story 
short, Python's methods are just thin temporary wrappers around plain 
functions.

>     a = MyClass()
>     a.SomeFunction(12)
> 
> SomeFunction() has a "self" implicitly added to the parameter list,  it
> seems that it should be smart enough to know that a function defined
> in a class has a "self" implicitly added to the parameter list.

The compiler has nothing to do with it, and where you define the 
function is totally orthogonal:

def truc(obj):
   print obj

class Toto(object):
   pass

Toto.trac = truc

t = Toto()
t.trac()



From jgardner.jonathangardner.net at gmail.com  Mon Sep 10 15:13:38 2007
From: jgardner.jonathangardner.net at gmail.com (Jonathan Gardner)
Date: Mon, 10 Sep 2007 19:13:38 -0000
Subject: Changing data in an QAbstractListModel
In-Reply-To: <1189153480.760570.273800@r34g2000hsd.googlegroups.com>
References: <1189095176.973314.227720@r29g2000hsg.googlegroups.com>
	<1189118539.748092.250140@g4g2000hsf.googlegroups.com>
	<1189153480.760570.273800@r34g2000hsd.googlegroups.com>
Message-ID: <1189451618.859215.187620@22g2000hsm.googlegroups.com>

On Sep 7, 1:24 am, "exhuma.twn" <exh... at gmail.com> wrote:
> Still, nothing is happening when I call this method. Do I still need
> to handle the "dataChanged" signal somehow? Or does the ListView take
> care of this?

You might have better luck asking these kinds of questions in the Qt
or PyQt forums.



From Caseyweb at gmail.com  Thu Sep 27 13:46:37 2007
From: Caseyweb at gmail.com (Casey)
Date: Thu, 27 Sep 2007 17:46:37 -0000
Subject: getopt with negative numbers?
In-Reply-To: <fdgpic$ssu$00$1@news.t-online.com>
References: <1190913250.198794.269530@k79g2000hse.googlegroups.com>
	<fdgpic$ssu$00$1@news.t-online.com>
Message-ID: <1190915197.390247.313590@57g2000hsv.googlegroups.com>

On Sep 27, 1:34 pm, Peter Otten <__pete... at web.de> wrote:
> optparse can handle options with a negative int value; "--" can be used to
> signal that no more options will follow:

Thanks, Peter.  getopt supports the POSIX "--" end of options
indicator as well, but that seems a little less elegant than being
able to simply set a value that tells the parser "I don't use any
numeric values as options, and I want to allow negative values as
arguments".  At the parser level implemening this would be trivial and
I frankly was hoping it had been implemented and it just wasn't
mentioned in the spares Python getopt library reference.



From mattheww at chiark.greenend.org.uk  Fri Sep 21 16:03:43 2007
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 21 Sep 2007 21:03:43 +0100 (BST)
Subject: An Editor that Skips to the End of a Def
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87odfxjgjy.fsf@pobox.com> <fd033u$bnc$1@lust.ihug.co.nz>
Message-ID: <3Md*NJqVr@news.chiark.greenend.org.uk>

Lawrence D'Oliveiro  <ldo at geek-central.gen.new_zealand> wrote:
>In message <87odfxjgjy.fsf at pobox.com>, John J. Lee wrote:

>> Seriously for a moment, I read something recently (maybe here?) about
>> an Apple study that claimed to show that people who perceived keyboard
>> bindings as being much faster than mouseing did not, on average, take
>> less time to complete the actions that were studied (they took more
>> time, in fact).  The plausible explanation for this was that people's
>> subjective perception of time is affected by the greater mental work
>> involved in typing (as opposed to mousing) for a given action.

> <http://www.asktog.com/SunWorldColumns/S02KeyboardVMouse3.html>

An interesting story. They say they picked a test for the express
purpose of proving that in some circumstances cursor keys can be faster
than the mouse, but came up with an exercise in which, unusually, the
keyboard part can be performed with one hand, so eliminating the bit
where the other hand moves from the keyboard to the mouse and back.

-M-



From jstroud at mbi.ucla.edu  Sat Sep 15 18:11:29 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sat, 15 Sep 2007 15:11:29 -0700
Subject: Python statements not forcing whitespace is messy?
In-Reply-To: <mailman.594.1189893054.2658.python-list@python.org>
References: <1189884110.006272.240840@50g2000hsm.googlegroups.com>	<mailman.589.1189887114.2658.python-list@python.org>	<1189890755.870694.29790@r29g2000hsg.googlegroups.com>
	<mailman.594.1189893054.2658.python-list@python.org>
Message-ID: <fchku3$n6e$1@daisy.noc.ucla.edu>

Steve Holden wrote:
> I don't know why you have a bug up your ass about it, as the
> Americans say.

I think most Americans say "wild hare up your ass". We do not, in fact, 
say "wild hair up your ass". Many of us can testify that a hair up one's 
ass would be nothing terribly unusual and would go completely unnoticed 
under most circumstances.

Also, some Americans erroneously say "hair's breath", and others think 
they mean "hare's breath" (which might be tiny, but diffuses quickly to 
theoretically infinite volume). In reality, however, they mean "hair's 
breadth"--which is quite small indeed! For instance, a hair's breadth is 
far smaller than a hare's breath (even at the exact moment of respiration).

James


From exhuma at gmail.com  Tue Sep 25 11:11:33 2007
From: exhuma at gmail.com (exhuma.twn)
Date: Tue, 25 Sep 2007 08:11:33 -0700
Subject: Clustering text-documents in bundles
Message-ID: <1190733093.110073.101460@k79g2000hse.googlegroups.com>

Hi,

This *is* off-topic but with python being a language with a somewhat
scientific audience, I might get lucky ;)
I have a set of documents (helpdesk tickets in fact) and I would like
to automatically collect them in bundles so I can visualise some
statistics depending on content.

A while ago I wrote a very simple clustering library which can cluster
about everything where you can calculate some form of distance.
Meaning: You can supply a function that calculates numeric value given
two objects (helpdesk request text-body in this case). The closer the
two objects are related, the smaller the returned value with 0.0
meaning that the two objects are identical.

Is it possible to calculate a distance between two chunks of text? I
suppose one could simply do a simple word-count on the chunks
(removing common noise words of course). And then go from there. Maybe
even assigning different weighting to words. But maybe there is a well-
tested and useful algorithm already available?

Text processing is a very blurry area for me. I don't expect any
solutions for the problem right away. Maybe just some pointers as to
*what* I can google for. I'll pick the rest up from there.

Eventually I would like to have the possibility to say: "This set of
texts contains 20 requests dealing with emails, 30 requests dealing
with Office Applications and 210 requests dealing with databases". I
am aware that labelling the different text-bundles will have to be
done manually I suppose.  But I will aim for no more than 10 bundles
anyway. So that's OK.



From zzbbaadd at aol.com  Mon Sep 17 04:05:12 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Mon, 17 Sep 2007 01:05:12 -0700
Subject: Python 3K or Python 2.9?
In-Reply-To: <46ee2d9d$0$26213$426a74cc@news.free.fr>
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
	<1189619033.968437.286580@g4g2000hsf.googlegroups.com>
	<5kr8vlF53m8gU3@mid.individual.net>
	<1189643616.826715.58150@d55g2000hsg.googlegroups.com>
	<87sl5j5r34.fsf@benfinney.id.au>
	<1189646281.569796.267940@d55g2000hsg.googlegroups.com>
	<87ir6f5mrq.fsf@benfinney.id.au>
	<1189651204.408268.57580@19g2000hsx.googlegroups.com>
	<1i4dddf.piaojwz9lz40N%aleax@mac.com>
	<1189700775.661780.292150@50g2000hsm.googlegroups.com>
	<46e97917$0$9014$426a74cc@news.free.fr>
	<mailman.563.1189823461.2658.python-list@python.org>
	<1190013177.473529.167770@o80g2000hse.googlegroups.com>
	<46ee2d9d$0$26213$426a74cc@news.free.fr>
Message-ID: <1190016312.637754.109770@n39g2000hsh.googlegroups.com>

<VivaLaFrance>
If you wanna know why the Renault Dauphine requires the driver to pull
down on the rearview mirror in order to shift into reverse you simply
need to open the hood and remove the engine and disassemble the
transmission and you will see that it has no way of distinguishing a
shift into third from a shift into reverse without a rearview mirror
pull. But these days most people just open the glove compartment when
shifting into reverse which works just as well!
 </VivaLaFrance>




From naga86 at gmail.com  Mon Sep 10 07:44:23 2007
From: naga86 at gmail.com (Nagarajan)
Date: Mon, 10 Sep 2007 04:44:23 -0700
Subject: less obvious "super"
In-Reply-To: <Xns99A77DA03E585duncanbooth@127.0.0.1>
References: <1189417830.645749.226120@d55g2000hsg.googlegroups.com>
	<Xns99A77DA03E585duncanbooth@127.0.0.1>
Message-ID: <1189424663.519606.190460@57g2000hsv.googlegroups.com>

On Sep 10, 4:20 pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> Nagarajan <nag... at gmail.com> wrote:
> > Here is what I need to achieve..
>
> > class A :
> >     def __init__( self ):
> >         self.x  = 0
>
> Don't use old style classes. If you are planning to use 'super' then you
> must use new-style classes, so use 'object' as a base class here.
>
>
>
> > class B ( A ):
> >     def __init__( self, something ):
> >         # Use "super" construct here so that I can "inherit" x of A
> >         self.y  = something
>
> > How should I use "super" so that I could access the variable "x" of A
> > in B?
>
> If you aren't worried about diamond shaped multiple inheritance
> hierarchies then just use:
>
> class B ( A ):
>     def __init__( self, something ):
>         A.__init__(self)
>         self.y  = something
>
> If you are then:
>
> class B ( A ):
>     def __init__( self, something ):
>         super(B, self).__init__()
>         self.y  = something
>
> When you use super you usually just want the current class and current
> instance as parameters. Putting that together:
>
> >>> class A(object):
>
>     def __init__( self ):
>         self.x  = 0
>
> >>> class B ( A ):
>
>     def __init__( self, something ):
>         super(B, self).__init__()
>         self.y  = something
>
>
>
> >>> obj = B(3)
> >>> obj.x
> 0
> >>> obj.y
> 3

What's the difference b/w:
   class A :
and



From deets at nospam.web.de  Wed Sep 26 03:50:23 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 26 Sep 2007 09:50:23 +0200
Subject: setuptools without unexpected downloads
In-Reply-To: <878x6ukkvq.fsf@benfinney.id.au>
References: <87ejgmklep.fsf@benfinney.id.au> <878x6ukkvq.fsf@benfinney.id.au>
Message-ID: <5luhb0Faal8aU1@mid.uni-berlin.de>

Ben Finney schrieb:
> Ben Finney <ben at benfinney.id.au> writes:
> 
>> How can I, as the distributor of a package using setuptools, gain
>> the benefits of dependency declaration and checking, without the
>> drawback of unexpected and potentially unwanted download and
>> installation?
> 
> To clarify: I want to retain the "assert the specified dependencies
> are satisfied" behaviour, without the "... and, if not, download and
> install them the Setuptools Way" behaviour.
> 
> Instead, I just want the default "dependencies not satisfied"
> behaviour for my 'setup.py' program to be: complain the dependencies
> aren't met, and refuse to install.

The problem here is that your favorite OS vendor/distributor not 
necessarily offers the required meta-information - so setuptools can't 
check the dependencies.

In my opinion, python is steering here to a direction like Java with 
it's classpath: scripts like workingenv and it's successor (forgot the 
name) provide hand-tailored environments for a specific application.

So maybe you should rather try and bundle your app in a way that it is 
self-contained.

Diez


From richyjsm at gmail.com  Sat Sep 22 23:23:56 2007
From: richyjsm at gmail.com (richyjsm at gmail.com)
Date: Sun, 23 Sep 2007 03:23:56 -0000
Subject: Getting rid of bitwise operators in Python 3?
In-Reply-To: <7xps0achlg.fsf@ruckus.brouhaha.com>
References: <46f49740$0$32514$4c368faf@roadrunner.com>
	<miaJi.28220$eY.3184@newssvr13.news.prodigy.net>
	<1190484589.890198.266430@y42g2000hsy.googlegroups.com>
	<13fbahtem90fp99@corp.supernews.com>
	<1190506229.092718.41690@g4g2000hsf.googlegroups.com>
	<7xps0achlg.fsf@ruckus.brouhaha.com>
Message-ID: <1190517836.766461.29570@g4g2000hsf.googlegroups.com>

On Sep 22, 9:10 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> Certainly xgcd should be in the math library or somewhere similar.

It does feel odd to have modular exponentiation in the core but no
other number-theoretic stuff in core+libraries.  Perhaps a proposal on
python-ideas is in order... Though it's not clear what else would be
useful; primality testing and factoring are obvious candidates, but I
don't much fancy writing an MPQS factorization algorithm in Python.
Well okay, I take that back---I wouldn't mind *writing* it;  I just
wouldn't expect to get much speed from *running* it.  Miller-Rabin
probabilistic primality testing would be easy to implement though.

Anyway, I'm getting way off-topic here... sorry.

>
> Not necessarily.  See for example http://trevp.net/tlslite

Interesting.  Thanks for the link.

Richard



From arnodel at googlemail.com  Tue Sep 18 14:46:39 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: Tue, 18 Sep 2007 11:46:39 -0700
Subject: Newbie question
In-Reply-To: <1190140395.567419.16280@k79g2000hse.googlegroups.com>
References: <1190139661.046103.45440@19g2000hsx.googlegroups.com>
	<mailman.732.1190140272.2658.python-list@python.org>
	<1190140395.567419.16280@k79g2000hse.googlegroups.com>
Message-ID: <1190141199.022303.262110@n39g2000hsh.googlegroups.com>

On Sep 18, 7:33 pm, kou... at hotmail.com wrote:
> On Sep 18, 1:31 pm, "Shawn Milochik" <Sh... at Milochik.com> wrote:
>
> > On 9/18/07, kou... at hotmail.com <kou... at hotmail.com> wrote:
>
> > > If I have a file name: AVC1030708.14.  How do I strip out certain
> > > characters from the file name?  I am so used to using MID, LEFT, and
> > > RIGHT functions, that I have no idea how to do this in python?  I have
> > > had trouble as well with most newbies on finding the help.  But I have
> > > used the command line built in help, but with no luck.  Thanks.
>
> > > Kou
>
> > Do you want to strip out specific characters, characters in specific
> > positions, or characters matching certain patterns?
>
> Yes, I want specific characters in specific positions.

The tutorial is a good place to start.  Read this section:

http://docs.python.org/tut/node5.html#SECTION005120000000000000000

HTH

--
Arnaud




From mbratcher at cclpcitrus.com  Thu Sep 27 09:37:05 2007
From: mbratcher at cclpcitrus.com (Mark Bratcher)
Date: Thu, 27 Sep 2007 09:37:05 -0400
Subject: Emailing the attachment created with the Quick Screenshots Script
	(Python + PIL)
Message-ID: <000001c8010b$81864eb0$eafca8c0@tfccorp.intra>

The Quick Screenshots Script (Python + PIL) is a "dream come true", and yet
so simple to use reliably.  Does anyone have a suggestion or know how to
include in the script, the ability to email the attachment?  This would make
the dream perfect!  Thanks!

 

Mark Bratcher

Consolidated Citrus, LP

4210-250 Metro, Parkway

Fort Myers, FL  33916

239-275-4060 ext 219

 

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From ahmad at baitalmal.com  Thu Sep 20 14:10:31 2007
From: ahmad at baitalmal.com (=?UTF-8?Q?Ahmad_=E3=8B=A1_Baitalmal?=)
Date: Thu, 20 Sep 2007 11:10:31 -0700
Subject: python-mcrypt install on Mac OSX
In-Reply-To: <5legsqF7k809U1@mid.uni-berlin.de>
References: <mailman.787.1190248902.2658.python-list@python.org>
	<5legsqF7k809U1@mid.uni-berlin.de>
Message-ID: <76583051-12DC-4780-A9A4-3A304051A61B@baitalmal.com>


On Sep 19, 2007, at 11:04 PM, Diez B. Roggisch wrote:

> Ahmad ? Baitalmal schrieb:
>> Hi,
>> I'm having a hard time getting python-mcrypt extension to build.
>> I installed libmcrypt with --prefix=/usr and I checked that the  
>> library
>> exists
>>
>> -rwxr-xr-x   1 root  wheel    352K Sep 19 16:53
>> /usr/lib/libmcrypt.4.4.8.dylib*
>> lrwxr-xr-x   1 root  wheel     21B Sep 19 16:53
>> /usr/lib/libmcrypt.4.dylib@ -> libmcrypt.4.4.8.dylib
>> lrwxr-xr-x   1 root  wheel     21B Sep 19 16:53
>> /usr/lib/libmcrypt.dylib@ -> libmcrypt.4.4.8.dylib
>> -rwxr-xr-x   1 root  wheel    801B Sep 19 16:53 /usr/lib/ 
>> libmcrypt.la*
>>
>> But this is the output from setting up python-mcrypt
>>
>> # python setup.py build
>> running build
>> running build_ext
>> building 'mcrypt' extension
>> creating build
>> creating build/temp.macosx-10.3-fat-2.5
>> gcc -arch ppc -arch i386 -isysroot /Developer/SDKs/MacOSX10.4u.sdk
>> -fno-strict-aliasing -Wno-long-double -no-cpp-precomp -mno-fused-madd
>> -fno-common -dynamic -DNDEBUG -g -O3 -DVERSION="1.1" -I/usr/include
>> -I/Library/Frameworks/Python.framework/Versions/2.5/include/ 
>> python2.5 -c
>> mcrypt.c -o build/temp.macosx-10.3-fat-2.5/mcrypt.o
>> creating build/lib.macosx-10.3-fat-2.5
>> gcc -arch i386 -arch ppc -isysroot /Developer/SDKs/MacOSX10.4u.sdk -g
>> -bundle -undefined dynamic_lookup
>> build/temp.macosx-10.3-fat-2.5/mcrypt.o -lmcrypt -o
>> build/lib.macosx-10.3-fat-2.5/mcrypt.so
>> /usr/bin/ld: for architecture ppc
>> /usr/bin/ld: can't locate file for: -lmcrypt
>> collect2: ld returned 1 exit status
>> /usr/bin/ld: for architecture i386
>> /usr/bin/ld: can't locate file for: -lmcrypt
>> collect2: ld returned 1 exit status
>> lipo: can't open input file: /var/tmp//ccGRKjU2.out (No such file or
>> directory)
>> error: command 'gcc' failed with exit status 1
>>
>>
>> What am I missing here? I linked PHP with the same libmcrypt library
>> just fine. This is only happening for this extension only.
>
> Try setting the DYLD_LIBRARY_PATH might help. Or altering the setup.py
> to add -L/usr/lib.
>
> Diez
> -- 
> http://mail.python.org/mailman/listinfo/python-list

Ok, I got it to work, but it still makes no sense. I had to install  
libmcrypt with --prefix=/usr/local.
If I do it with --prefix=/usr then for some reason ld won't find it  
when building python-mcrypt.

Obviously I had to also change the include_dirs and library_dirs in  
the setup.py file.


I thought I'd share that so hopefully someone can explain what that's  
all about.

Thx

From __peter__ at web.de  Tue Sep 11 13:22:09 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 11 Sep 2007 19:22:09 +0200
Subject: ValueError: insecure string pickle ?
References: <fc6bm9$jd6$1@news.albasani.net>
Message-ID: <fc6is1$t82$02$1@news.t-online.com>

Am Tue, 11 Sep 2007 17:19:36 +0200 schrieb robert:

> cPickle.loads  raised "ValueError: insecure string pickle".
> The error is from a log file and I cannot reproduce it (quickly). 
> What can be the cause for that error?

A corrupted pickle. The error is raised if a string in the dump does not
both start and end with " or '. One way to provoke the error:

>>> from cPickle import loads, dumps
>>> s = dumps("abc")
>>> s
"S'abc'\np1\n." # that's what it should look like
>>> loads("S'abc") # but make it too short
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: insecure string pickle

Peter


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Sep 14 03:25:51 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 14 Sep 2007 09:25:51 +0200
Subject: mass editing for keys in a dictionary
In-Reply-To: <1189752977.078417.291770@57g2000hsv.googlegroups.com>
References: <1189752977.078417.291770@57g2000hsv.googlegroups.com>
Message-ID: <46ea3773$0$21741$426a34cc@news.free.fr>

james_027 a ?crit :
> hi,
> 
> How could I transform something like this
> 
> dict_1 = {'customer_id':1, 'item_id':3, amount:100}
> 
> into
> 
> dict_2 = {'customer':1, 'item':3, amount:100}

dict_2 = dict((k[:-3], v) for k, v in dict_1.iteritems())


From ldo at geek-central.gen.new_zealand  Thu Sep 13 00:33:46 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Thu, 13 Sep 2007 16:33:46 +1200
Subject: mod_python and pysvn
References: <1189525797.361829.69380@g4g2000hsf.googlegroups.com>
	<mailman.392.1189526179.2658.python-list@python.org>
	<5ko2anF4iuuiU1@mid.individual.net>
	<1189535700.882545.253160@k79g2000hse.googlegroups.com>
	<mailman.466.1189656033.2658.python-list@python.org>
Message-ID: <fcaeja$3ie$3@lust.ihug.co.nz>

In message <mailman.466.1189656033.2658.python-list at python.org>, Gabriel
Genellina wrote:

> If that's really actual code, looks wrong. You should double all your
> backslashes or use a raw string. And \\P:... doesn't look well formed
> either.

DOSlexia strikes again. :)


From nutsbreaker1 at gmail.com  Mon Sep 17 14:33:30 2007
From: nutsbreaker1 at gmail.com (nutsbreaker1 at gmail.com)
Date: Mon, 17 Sep 2007 11:33:30 -0700
Subject: Free trips around the globe!!!!!!!!!!
Message-ID: <1190054010.350444.11150@19g2000hsx.googlegroups.com>

http://world-traveling-destinations.blogspot.com/



From gherzig at fmed.uba.ar  Thu Sep 20 21:43:13 2007
From: gherzig at fmed.uba.ar (gherzig at fmed.uba.ar)
Date: Thu, 20 Sep 2007 22:43:13 -0300 (ART)
Subject: executing list of methods (and collecting results)
In-Reply-To: <5lgi6qF81sotU1@mid.individual.net>
References: <mailman.839.1190329275.2658.python-list@python.org>
	<5lgi6qF81sotU1@mid.individual.net>
Message-ID: <2316.190.55.67.65.1190338993.squirrel@www.webmail.fmed.uba.ar>

> Gerardo Herzig wrote:
>
>> I want the collect_validators() method is to execute any of the
>> above methods, and collect their names as items of a list (wich
>> will be the collect_validators() return value).
>
> (inside class definition -- untested)
> validators = {"is a number": is_really_a_number,
>               "is even": is_even,
>               "is greater than zero": is_greater_than_zero}
>
> def collect_validators(self):
>    return [desc for desc, func in self.validators.items() if func()]
>
Excelent!!!
>> My first approach is:
>
> ... no method, but a generator. Executing it will give you a
> generator object instead of a result list.
>
>> [code]
>> def collect_validators(self):
>>     v_dict = { 'is_really_a_number': is_really_a_number,
>>                       'is_even': is_even,
>>                       'is_greater_than_zero', is_greater_than_zero
>>                    }
>>
>>        for name, meth in v_dict.items():
>>           result = meth()
>>           if result: yield name
>> [/code]
>>
>> I wondering if is this a good pattern to apply, i like the way it
>> looks like, at least to me it looks `natural',
>
> IMHO, it doesn't look natural. It depends on what you want to
> achieve. This generator will need to be iterated over until it
> is "exhausted".
Im having some fun doing a mail filter. A master thread will fire several
threads (each one returning a list with the matched validators) and
collect the results of each one of them.
>
>> but...im calling every method twice here?
>
> No. Methods are only called if you apply the function call
> operator, "()".
>
> BTW, I hope you don't really want to test a number to be greater
> than zero, or even, by using an own method, respectively, just to
> test this.
Haha, no, the actual methods do other kind of things.
Thanks Bj?rn!!!

Cheers.
Gerardo




From jcd at sdf.lonestar.org  Sat Sep 15 16:11:26 2007
From: jcd at sdf.lonestar.org (J. Cliff Dyer)
Date: Sat, 15 Sep 2007 16:11:26 -0400
Subject: Python statements not forcing whitespace is messy?
In-Reply-To: <1189884110.006272.240840@50g2000hsm.googlegroups.com>
References: <1189884110.006272.240840@50g2000hsm.googlegroups.com>
Message-ID: <46EC3C6E.6050002@sdf.lonestar.org>

buffi wrote:
> Am I the only one that thinks that python statements should force
> whitespace before and after them?
>
> Right now this is not enforced and for an example these statements are
> valid
>
> print"hello"
> "foo"if"bar"else"foobar"
> for(x,y)in[(1,2),(3,4)]:print(x,y)
> [(y)for(x,y)in[("foo",2),("bar",4)]if"foo"in(x)]
>
> ...and so on.
>

On the other hand, this is just as bad:

[ ( y ) for ( x , y ) in [ ( "foo" , 2 ) , ( "bar" , 4 ) ] if "foo" in (
x ) ]


And I'd hate to have to remember all of the rules for what can go
together and what can't, especially when it comes time to debug.  No.
I don't think it should be forced, but maybe put it in PEP8 or PEP3008.

Also, the only thing I find thoroughly disagreeable in all of that
mess, is the run-ins involving " characters.  The rest are at least
clear at a glance what belongs where.

Also, would you require the following?

my_function (swallow='European')

Because that is just an awful use of whitespace.

Cheers,
Cliff





From bbxx789_05ss at yahoo.com  Sat Sep 15 19:14:15 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Sat, 15 Sep 2007 16:14:15 -0700
Subject: (wxPython) wx.ProgressDialog - how to cancel out of?
In-Reply-To: <rvrme3tb8snr5rnqgf5p8g1g4ponp0nbfj@4ax.com>
References: <rvrme3tb8snr5rnqgf5p8g1g4ponp0nbfj@4ax.com>
Message-ID: <1189898055.381817.187610@w3g2000hsg.googlegroups.com>

On Sep 14, 11:57 pm, Terry Carroll <carr... at nospam-tjc.com> wrote:
> I'm trying to use wx.ProgressBar, and the cancel button is not
> responding.
>
> Here is a simple program that exhibits the problem:
>
> #########################################################
> import  wx
> import time
>
> max = 10
> app = wx.PySimpleApp()
> dlg = wx.ProgressDialog("Progress dialog example",
>                        "variables to be shown here",
>                        maximum = max,
>                        style = wx.PD_CAN_ABORT
>                         | wx.PD_CAN_SKIP
>                         #| wx.PD_APP_MODAL
>                         | wx.PD_ELAPSED_TIME
>                         | wx.PD_ESTIMATED_TIME
>                         | wx.PD_REMAINING_TIME
>                         )
>
> keepGoing = True
> skip = False
> count = 0
>
> while keepGoing and count < max:
>     count += 1
>     wx.MilliSleep(1000)
>     #time.sleep(1)
>     newtext = "(before) count: %s, keepGoing: %s, skip: %s " % \
>               (count, keepGoing, skip)
>     print newtext
>     (keepGoing, skip) = dlg.Update(count, newtext)
>     newtext = "(after) count: %s, keepGoing: %s, skip: %s " % \
>               (count, keepGoing, skip)
>     print newtext
> dlg.Destroy()
> #########################################################
>
> The dialog looks right when this runs, but....  
>
> What's right: I get a progress bar;  it includes "Skip" and "Cancel"
> buttons; it shows 10 seconds of progress, and updates once per second
> with the variables' values on each iteration.
>
> What's wrong is that I can't get clicking on the "Skip" or "Cancel"
> buttons to have any effect.  Instead, as soon as the dialog displays,
> I get an hourglass, and it doesn't matter what I click on.  Here's
> what the print statements display, consistently, regardless of what I
> try to click or whether I click nothing at all:
>
> I:\python>test1.py
> (before) count: 1, keepGoing: True, skip: False
> (after) count: 1, keepGoing: True, skip: False
> (before) count: 2, keepGoing: True, skip: False
> (after) count: 2, keepGoing: True, skip: True
> (before) count: 3, keepGoing: True, skip: True
> (after) count: 3, keepGoing: True, skip: True
> (before) count: 4, keepGoing: True, skip: True
> (after) count: 4, keepGoing: True, skip: True
> (before) count: 5, keepGoing: True, skip: True
> (after) count: 5, keepGoing: True, skip: True
> (before) count: 6, keepGoing: True, skip: True
> (after) count: 6, keepGoing: True, skip: True
> (before) count: 7, keepGoing: True, skip: True
> (after) count: 7, keepGoing: True, skip: True
> (before) count: 8, keepGoing: True, skip: True
> (after) count: 8, keepGoing: True, skip: True
> (before) count: 9, keepGoing: True, skip: True
> (after) count: 9, keepGoing: True, skip: True
> (before) count: 10, keepGoing: True, skip: True
> (after) count: 10, keepGoing: True, skip: True
>
> Two oddities here:
>
> 1) As I read the docs, the keepGoing variable should be set to True,
> unless I click on "Cancel," in which case it should be set to False
> (which would end the loop).  That doesn't happen.  This is really what
> I'm most concerned here with.
>
> 2) The variable "skip: set to False on the first iteration, and then
> set to True on subsequent iterations?  Note that this happens even if
> no buttons are selected.  This is just a weirdness to me, and not my
> main concern, but I thought I'd mention it in case it's relevant.
>
> You can see some variations in the commented-out code that I tried;
> they did not help.
>
> Relevant software and releases:
>
> OS: Windows XP Home Edition, Version 2002, SP2
> Python: ActivePython 2.5.0.0
> wxPython: 2.8.1.1 (msw-unicode)
>
> Any help appreciated.

And here's a version that hides the frame and shows it only after the
progress dialog has finished or been cancelled:

import wx

app = wx.PySimpleApp()

win = wx.Frame(None, -1, "Test Progress Dialog")
timer = wx.Timer(win)
#win.Bind(wx.EVT_TIMER, on_timer_expiry, timer)

def on_timer_expiry(evt):
    max = 10
    dialog = wx.ProgressDialog(
            "Loading",
            "progress:",
            max,
            style = wx.PD_CAN_ABORT
                |wx.PD_CAN_SKIP
                |wx.PD_ELAPSED_TIME
                |wx.PD_ESTIMATED_TIME
                |wx.PD_REMAINING_TIME
    )


    keep_going = True
    skip = False
    count = 0
    while keep_going and (count < max):
        count += 1
        wx.MilliSleep(1000)

        (keep_going, skip) = dialog.Update(count)
        print skip

    dialog.Destroy()
    timer.Stop()

    win.Show() #********************



win.Bind(wx.EVT_TIMER, on_timer_expiry, timer)
timer.Start(1000)

#win.Show()
app.MainLoop()



From samir.vds at googlemail.com  Sat Sep 15 17:11:39 2007
From: samir.vds at googlemail.com (samir.vds at googlemail.com)
Date: Sat, 15 Sep 2007 21:11:39 -0000
Subject: problems using pythom tempfile module
Message-ID: <1189890699.807384.258580@o80g2000hse.googlegroups.com>

Hello everyone,

I'm trying to test the tempfile module with the following script,
which basically creates a temporary file, fills the file with some
test data and prints it.

import tempfile

t = tempfile.TemporaryFile()
t.write("lalalala")
t.flush()
print t.read()

Unfortunately, the print statement gives me an empty string. Can
somebody tell me what I'm doing wrong ?


regards Samir



From uymqlp502 at sneakemail.com  Sun Sep  2 01:49:38 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: Sat, 01 Sep 2007 22:49:38 -0700
Subject: status of Programming by Contract (PEP 316)?
In-Reply-To: <1188711881.370954.175830@o80g2000hse.googlegroups.com>
References: <1188364909.397692.209170@q4g2000prc.googlegroups.com>
	<1188367108.393207.241970@g4g2000hsf.googlegroups.com>
	<1188369928.755777.142690@i38g2000prf.googlegroups.com>
	<46d75191$0$401$426a74cc@news.free.fr>
	<1188518054.298017.90610@x35g2000prf.googlegroups.com>
	<46d76595$0$4013$426a74cc@news.free.fr>
	<7xlkbsmqe4.fsf@ruckus.brouhaha.com>
	<1188525647.003223.199620@q5g2000prf.googlegroups.com>
	<mailman.181.1188527203.28954.python-list@python.org>
	<1188537516.622167.115080@z24g2000prh.googlegroups.com>
	<mailman.217.1188577500.28954.python-list@python.org>
	<1188585630.539835.242460@i38g2000prf.googlegroups.com>
	<mailman.234.1188588307.28954.python-list@python.org>
	<1188592039.612652.223700@r23g2000prd.googlegroups.com>
	<1i3ryxd.g2pzgq159lt5sN%aleax@mac.com>
	<1188711881.370954.175830@o80g2000hse.googlegroups.com>
Message-ID: <1188712178.448659.105070@y42g2000hsy.googlegroups.com>

On Sep 1, 10:44 pm, Russ <uymqlp... at sneakemail.com> wrote:

> On, one more thing. I see that the line wrapping on Google Groups is
> finally working for me after many months. Fantastic! I can't help but
> wonder if my mentioning it to you a few days ago had anything to do
> with it.

Well, it's working on the input side anyway.



From lobais at gmail.com  Sun Sep 23 13:41:52 2007
From: lobais at gmail.com (Thomas Dybdahl Ahle)
Date: Sun, 23 Sep 2007 19:41:52 +0200
Subject: building a GUI
References: <1190557293.266783.251480@y42g2000hsy.googlegroups.com>
	<mailman.940.1190560838.2658.python-list@python.org>
Message-ID: <pan.2007.09.23.17.41.52@gmail.com>

Den Sun, 23 Sep 2007 17:28:38 +0200 skrev stef mientki:
> yadin wrote:
>
>> if i were up to make a GUI chich are the advantages of choosing python
>> over matlab or java?
>>
> The best is Delphi,
> second is VB,

That sounds mostly like a personal preference :)

I would certainly suggest Python very much for any kind of gui.


From rschroev_nospam_ml at fastmail.fm  Tue Sep 18 04:28:08 2007
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Tue, 18 Sep 2007 08:28:08 GMT
Subject: The meaning of  a = b  in object oriented languages
In-Reply-To: <fco0ev$hgj$1@news2.u-psud.fr>
References: <1190094057.976729.285120@n39g2000hsh.googlegroups.com>
	<fco0ev$hgj$1@news2.u-psud.fr>
Message-ID: <s_LHi.111195$C95.5745789@phobos.telenet-ops.be>

Laurent Pointal schreef:
> Summercool a ?crit :
>>
>> The meaning of  a = b  in object oriented languages.
>> ====================================================
> <zip>
> 
> Oups, reading the subject I thought it was a Xah Lee post.

me too ...

-- 
The saddest aspect of life right now is that science gathers knowledge
faster than society gathers wisdom.
   -- Isaac Asimov

Roel Schroeven


From jcd at sdf.lonestar.org  Thu Sep 13 13:14:25 2007
From: jcd at sdf.lonestar.org (J. Clifford Dyer)
Date: Thu, 13 Sep 2007 13:14:25 -0400
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <13eiosgssjkt3dd@corp.supernews.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
	<1189666095.727426.135170@o80g2000hse.googlegroups.com>
	<1189685403.306218.13270@22g2000hsm.googlegroups.com>
	<13eigagsuk74l55@corp.supernews.com>
	<46e94623$0$30375$9b4e6d93@newsspool4.arcor-online.net>
	<13eiosgssjkt3dd@corp.supernews.com>
Message-ID: <20070913171425.GA14519@sdf.lonestar.org>

On Thu, Sep 13, 2007 at 04:21:36PM -0000, Steven D'Aprano wrote regarding Re: newbie: self.member syntax seems /really/ annoying:
> 
> It's not just a matter of taste.
> 
> Reading comprehensibility is an objective, measurable quantity, and I 
> would bet that "(self.foo + self.bar) * self.baz" would be measurably 
> more readable on average than either of your two alternatives _even for 
> those people who claim to hate it_. 
> 

It may be measurable, but it is also contextual.  Depending on what you've been trained in, one way or the other might be more readable.  For a teenager in a major city, tagging is far more readable than a Fraktur font, but for Mad King Ludwig, it was certainly quite the opposite.  Objectively, measurably so, to be sure.  Also depending on what you are looking for in the source code.  Readability can in most cases be enhanced by minimizing those things that serve only to distract from the meaning.  Hence the OP's desire to see his formulae, uncluttered by the word self.  Now will such a change make his code less readable for other python programmers who may look at it later?  Indubitably.  But that's a different issue.

Moreover, it may be that the best solution is to stop trying for an object-oriented solution.  Why not use a functional programming style to represent mathematical functions?

Cheers,
Cliff



From paddy3118 at googlemail.com  Thu Sep 13 16:07:10 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Thu, 13 Sep 2007 20:07:10 -0000
Subject: Parallel/Multiprocessing script design question
In-Reply-To: <yK3Gi.61203$Pv4.51195@newsfe19.lga>
References: <yK3Gi.61203$Pv4.51195@newsfe19.lga>
Message-ID: <1189714030.832939.42690@22g2000hsm.googlegroups.com>

Hi Amit,
Why not create a list of those 800+ files and a sccript that when run,
looks for an environment variable that will be a number from 1 to 800,
selectss the file at that line number and processes it fully.

For the process control install a job scheduler such as LSF or the Sun
grid Engine http://en.wikipedia.org/wiki/Sun_Grid_Engine and use JOB
ARRAYS:
http://docs.sun.com/app/docs/doc/820-0699/6nce0ht7s?l=en&a=view#i999498

- Paddy.



From grante at visi.com  Tue Sep 18 12:51:43 2007
From: grante at visi.com (Grant Edwards)
Date: Tue, 18 Sep 2007 16:51:43 -0000
Subject: can Python be useful as functional?
References: <1190073045.618869.261290@k79g2000hse.googlegroups.com>
	<mailman.727.1190133380.2658.python-list@python.org>
Message-ID: <13f00gv3gl3n43d@corp.supernews.com>

On 2007-09-18, Steve Holden <steve at holdenweb.com> wrote:
> Lorenzo Stella wrote:
> [...]
>>
>> My question is: how can we call a language "functional" if
>> it's major implementation has a limited stack? Or is my code
>> wrong?
>
> So, which environment do you habitually use that provides an
> *unlimited* stack?

Perhaps Lorenzo Stella is referring to Python's lack of
tail-recursion optimization?  There are languages that
guarantee unlimited tail-recursion with a limited stack.

That's a typical feature for a function language, right?

> You just don't like the specific limit that Python imposes. So
> increase it with sys.setrecursionlimit().

-- 
Grant Edwards                   grante             Yow! I hope I bought the
                                  at               right relish ... zzzzzzzzz
                               visi.com            ...


From rcdailey at gmail.com  Tue Sep 25 11:44:35 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Tue, 25 Sep 2007 10:44:35 -0500
Subject: Regular Expressions: Can't quite figure this problem out
In-Reply-To: <1190733242.746403.264650@o80g2000hse.googlegroups.com>
References: <496954360709241737o6e42e7efk29886b5631f6ca2e@mail.gmail.com>
	<a49e45f50709241827i107d0acav28431853ef403702@mail.gmail.com>
	<496954360709241853w6bb6e813ved0ec4fc80304d51@mail.gmail.com>
	<op.ty6tjyfqx6zn5v@gabriel2.softlabbsas.com.ar>
	<496954360709241917m3801e4aavee29cfef7deaf41b@mail.gmail.com>
	<fd9rs6$8b2$1@sea.gmane.org>
	<496954360709241951h6901d60etf2c4b3b5ec759f2a@mail.gmail.com>
	<mailman.1026.1190694227.2658.python-list@python.org>
	<1190733242.746403.264650@o80g2000hse.googlegroups.com>
Message-ID: <496954360709250844j4567b9e8ra2ed718fa976903d@mail.gmail.com>

Fortunately I don't have any XML that complex, however you make a good
point.

On 9/25/07, Paul McGuire <ptmcg at austin.rr.com> wrote:
>
> On Sep 24, 11:23 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
> > En Mon, 24 Sep 2007 23:51:57 -0300, Robert Dailey <rcdai... at gmail.com>
> > escribi?:
> >
> > > What I meant was that it's not an option because I'm trying to learn
> > > regular
> > > expressions. RE is just as built in as anything else.
> >
> > Ok, let's analyze what you want. You have for instance this text:
> > "<action></action>"
> > which should become
> > "<action/>"
> >
> > You have to match:
> > (opening angle bracket)(any word)(closing angle bracket)(opening angle
> > bracket)(slash)(same word as before)(closing angle bracket)
> >
> > This translates rather directly into this regular expression:
> >
> > r"<(\w+)></\1>"
> >
> > where \w+ means "one or more alphanumeric characters or _", and being
> > surrounded in () creates a group (group number one), which is
> > back-referenced as \1 to express "same word as before"
> > The matched text should be replaced by (opening <)(the word
> > found)(slash)(closing >), that is: r"<\1/>"
> > Using the sub function in module re:
> >
> > py> import re
> > py> source = """
> > ... <root></root>
> > ... <root/>
> > ... <root><frame type="image"><action></action></frame></root>
> > ... <root><frame type="image"><action/></frame></root>
> > ... """
> > py> print re.sub(r"<(\w+)></\1>", r"<\1/>", source)
> >
> > <root/>
> > <root/>
> > <root><frame type="image"><action/></frame></root>
> > <root><frame type="image"><action/></frame></root>
> >
> > Now, a more complex example, involving tags with attributes:
> > <frame type="image"></frame>  -->  <frame type="image" />
> >
> > You have to match:
> > (opening angle bracket)(any word)(any sequence of words,spaces,other
> > symbols,but NOT a closing angle bracket)(closing angle bracket)(opening
> > angle bracket)(slash)(same word as before)(closing angle bracket)
> >
> > r"<(\w+)([^>]*)></\1>"
> >
> > [^>] means "anything but a >", the * means "may occur many times, maybe
> > zero", and it's enclosed in () to create group 2.
> >
> > py> source = """
> > ... <root></root>
> > ... <root><frame type="image"></frame></root>
> > ... """
> > py> print re.sub(r"<(\w+)([^>]*)></\1>", r"<\1\2 />", source)
> >
> > <root />
> > <root><frame type="image" /></root>
> >
> > Next step would be to allow whitespace wherever it is legal to appear -
> > left as an exercise to the reader. Hint: use \s*
> >
> > --
> > Gabriel Genellina
>
> And let's hope the OP doesn't have to parse anything truly nasty like:
>
> <esolang:language name="Python" interpreter_prompt=">>>"></
> esolang:language>
>
> -- Paul
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From deets at nospam.web.de  Mon Sep 17 10:53:17 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 17 Sep 2007 16:53:17 +0200
Subject: simple regular expression problem
References: <1190034041.796626.66790@n39g2000hsh.googlegroups.com>
Message-ID: <5l7imuF6mn3gU1@mid.uni-berlin.de>

duikboot wrote:

> Hello,
> 
> I am trying to extract a list of strings from a text. I am looking it
> for hours now, googling didn't help either.
> Could you please help me?
> 
>>>>s = """
>>>>\n<organisatie>\n<Profiel_Id>28996</Profiel_Id>\n</organisatie>\n<organisatie>\n<Profiel_Id>28997</Profiel_Id>\n</organisatie>"""
>>>> regex = re.compile(r'<organisatie.*</organisatie>', re.S)
>>>> L = regex.findall(s)
>>>> print L
> ['organisatie>\n<Profiel_Id>28996</Profiel_Id>\n</organisatie>
> \n<organisatie>\n<Profiel_Id>28997</Profiel_Id>\n</organisatie']
> 
> I expected:
> [('organisatie>\n<Profiel_Id>28996</Profiel_Id>\n</organisatie>
> \n<organisatie>), (<organisatie>\n<Profiel_Id>28997</Profiel_Id>\n</
> organisatie')]
> 
> I must be missing something very obvious.

Don't use regular expressions to process XML. It's not the right tool for
the job, and even if simple cases as yours often can made work initially,
the longer you work with it, the more complex and troublesome the code
gets.

Instead, use the right tool, for example lxml. That has e.g.
XPath-expressions build in, that do the job:


from lxml import etree

tree =
etree.fromstring("""<root><organisatie>\n<Profiel_Id>28996</Profiel_Id>\n</organisatie>\n<organisatie>\n<Profiel_Id>28997</Profiel_Id>\n</organisatie></root>""")

for feld in tree.xpath('//organisatie/Profiel_Id'):
    print feld.text



Diez


From software at ginstrom.com  Wed Sep 26 09:30:44 2007
From: software at ginstrom.com (Ryan Ginstrom)
Date: Wed, 26 Sep 2007 22:30:44 +0900
Subject: Test-driven development and code size
In-Reply-To: <fddcnp$sn9$1@news.lysator.liu.se>
References: <fdai0b$7iv$1@news.lysator.liu.se><5ls95aF9pq3gU1@mid.uni-berlin.de><mailman.1054.1190736712.2658.python-list@python.org><fdborn$h5q$1@news.lysator.liu.se><87ejgmmgc2.fsf_-_@benfinney.id.au>
	<fddcnp$sn9$1@news.lysator.liu.se>
Message-ID: <011201c80041$71f9ce10$0203a8c0@MOUSE>

> On Behalf Of Joel Hedlund
> My presumption has been that in order to do proper 
> test-driven development I would have to make enormous test 
> suites covering all bases for my small hacks before I could 
> getting down and dirty with coding (as for example in 
> http://www.diveintopython.org/unit_testing). This of course 
> isn't very appealing when you need something done "now". But 
> if I understand you correctly, if I would formalize what 
> little testing I do, so that I can add to a growing test 
> suite for each program as bugs are discovered and needs 
> arise, would you consider that proper test-driven 
> development? (or rather, is that how you do it?)

Have you looked at nose?
http://somethingaboutorange.com/mrl/projects/nose/

It automatically discovers your unit tests and runs them. I have a command
in my Komodo toolbox that runs the nosetests script on the current
directory. So the overhead of writing (and running) unit tests is very
small.

Usually, even when developing one-off scripts, you'll try some test cases,
maybe do some testing at the interactive prompt. That can serve as the basis
of your unit tests. Then maybe the first time you want to import that module
from another script, you can beef up your unit tests then.

If unit testing seems like too much work, people won't do it. So I think
it's good to start out by doing just enough unit testing that it's not
onerous. As you see the benefits, you'll probably seem them as less onerous,
of course.

Regards,
Ryan Ginstrom



From steve at holdenweb.com  Tue Sep 11 10:52:07 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 11 Sep 2007 10:52:07 -0400
Subject: Car-ac-systems
In-Reply-To: <cd6dnW0Vf8-wOnvbRVnyhwA@eclipse.net.uk>
References: <1189511932.371621.112970@o80g2000hse.googlegroups.com>	<BeqdnaFrktIgBHvbnZ2dnUVZ8v-dnZ2d@eclipse.net.uk>	<YaadnYyTWsmTAnvbnZ2dnUVZ_iydnZ2d@comcast.com>
	<cd6dnW0Vf8-wOnvbRVnyhwA@eclipse.net.uk>
Message-ID: <fc6a2m$aim$1@sea.gmane.org>

John Timney (MVP) wrote:
> Thats all it is.  It may have been a usefully intended resource once, but 
> they have no controls whatsoever.  Its time someone closed it down.
> 
What is it about "please do not top-post" that you have difficulty 
understanding? Or do "MVP"s feel that their time is so much more 
valuable than anyone else's that they are free to ignore the norms?

Furthermore, please don't do the spammer the favor of repeating the URL 
in yet another post. This only leaves further trails through the search 
engines for innocents to trip over.

Are you new to the Internet, or just generally clueless?

regards
  Steve (B.Sc., MBCS, CITP)

> Regards
> 
> John Timney (MVP)
> http://www.johntimney.com
> http://www.johntimney.com/blog
> 
> 
> "Lew" <lew at lewscanon.com> wrote in message 
> news:YaadnYyTWsmTAnvbnZ2dnUVZ_iydnZ2d at comcast.com...
>> John Timney (MVP) wrote:
>>> How do I control one with C# then!  Thats not on your site, clearly not 
>>> everything I need to know then.  Waste of a site!
>> Please do not top post.
>>
>>> "knjaz" <knjaz0 at gmail.com> wrote in message
>>>> Here you can find everything you need to know about car air
>>>> conditioning
>>>>
>>>> http://....blogspot.spam/
>> I'm starting to see "blogspot" as a synonym for "spam".
>>
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From chris.monsanto at gmail.com  Fri Sep 21 15:05:51 2007
From: chris.monsanto at gmail.com (chris.monsanto at gmail.com)
Date: Fri, 21 Sep 2007 12:05:51 -0700
Subject: RE Help
In-Reply-To: <mailman.884.1190400295.2658.python-list@python.org>
References: <1190399985.324448.242610@d55g2000hsg.googlegroups.com>
	<mailman.884.1190400295.2658.python-list@python.org>
Message-ID: <1190401551.706792.178450@22g2000hsm.googlegroups.com>

On Sep 21, 2:44 pm, David <wizza... at gmail.com> wrote:
> > data = "asdfasgSTARTpruyerfghdfjENDhfawrgbqfgsfgsdfg"
> > x = re.compile('START.END', re.DOTALL)
>
> This should work:
>
> x = re.compile('START(.*)END', re.DOTALL)

You'll want to use a non-greedy match:

x = re.compile(r"START(.*?)END", re.DOTALL)

Otherwise the . will match END as well.



From http  Sat Sep 22 05:32:30 2007
From: http (Paul Rubin)
Date: 22 Sep 2007 02:32:30 -0700
Subject: Would Anonymous Functions Help in Learning Programming/Python?
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<46f45f02$0$15350$4c368faf@roadrunner.com>
	<7xps0bgq6p.fsf@ruckus.brouhaha.com>
	<46f4dd90$0$32490$4c368faf@roadrunner.com>
Message-ID: <7x64232ggh.fsf@ruckus.brouhaha.com>

Carl Banks <pavlovevidence at gmail.com> writes:
> That's it, lost me already.  You ever see the kinds of programs 
> mechanical engineers write?  It isn't software.

They do a lot of number crunching.  Certainly they can appreciate
higher order functions like integrate(f, x0, x1) to integrate the
function f from x0 to x1; or diff(f, x0) to find the derivative of f
at x0; etc.  Fortran had cheesy ways to do this as far back as the
1950's.


From deets at nospam.web.de  Wed Sep  5 13:31:05 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 05 Sep 2007 19:31:05 +0200
Subject: python-spidermonkey
In-Reply-To: <1189012861.893842.87710@k79g2000hse.googlegroups.com>
References: <1189012861.893842.87710@k79g2000hse.googlegroups.com>
Message-ID: <5k87f6F2icddU1@mid.uni-berlin.de>

zowtar schrieb:
> Guys, I am using slackware... js-spidermonkey 1.5 compiled - OK, Pyrex
> installed, but python-spidermonkey don't build...
> 
> Screenshot: http://img406.imageshack.us/img406/562/testebp5.png
> 
> what is the problem?

google dead today?

http://article.gmane.org/gmane.comp.python.wwwsearch.general/1085

Might help.

Diez


From michal.zaborowski at gmail.com  Thu Sep 13 07:44:15 2007
From: michal.zaborowski at gmail.com (michal.zaborowski at gmail.com)
Date: Thu, 13 Sep 2007 04:44:15 -0700
Subject: read part of jpeg file by pure python
In-Reply-To: <1189673325.083163.210630@d55g2000hsg.googlegroups.com>
References: <1189671634.712690.154580@o80g2000hse.googlegroups.com>
	<fcat76$vnc$1@news2.u-psud.fr>
	<1189673325.083163.210630@d55g2000hsg.googlegroups.com>
Message-ID: <1189683855.168075.325770@o80g2000hse.googlegroups.com>

On 13 Wrz, 10:48, Pacino <xiaoyish... at gmail.com> wrote:
> On 9 13 ,   4 43 , Laurent Pointal <laurent.poin... at limsi.fr> wrote:
>
> > Pacino a ?crit :
>
> > > Hi, everyone,
>
> > > I am wondering whether it's possible to read part (e.g. 1000*1000) of
> > > a huge jpeg file (e.g. 30000*30000) and save it to another jpeg file
> > > by pure python. I failed to read the whole file and split it, because
> > > it would cost 2GB memory.
>
> > > Can anyone help me? Any comments would be appreciated.
>
>
> > Just reading parts of the *file* is easy (see tell() seek() and read()
> > methods on files).
> > But to extract a part of the *picture*, you must uncompress the picture
> > in memory, grab the sub-picture, and save it back - generally with
> > compression. I can't see how you can bypass the uncompress/compress
> > phases and the corresponding memory use.
>
>
> The most difficult part is the uncompress part. I don't want the whole
> picture to be uncompressed in the memory, because it will consume a
> lot of memory (2GB, as I mentioned). My goal is to uncompress part of
> the picture into the memory.
>
> I just read some article on this subject (http://mail.python.org/
> pipermail/image-sig/1999-April/000713.html) , but haven't test it out
> yet.
>
  I have no idea what it does. Anyway - jpeg:
1. RGB -> HLV
2. divide data into 8x8 - blocks of data.
3. blocks are treated with discrete cosine transform.
4. Result is filtered to remove "fast changes".
5. Then result is compressed with Huffman alg.

So to get part of image - you can take smaller image before step 4.
As far as I understand code presented at:
http://mail.python.org/pipermail/image-sig/1999-April/000713.html
- full image will be loaded, and cutted.

--
Regards,
  Micha? Zaborowski (TeXXaS)



From robert.kern at gmail.com  Tue Sep 18 18:58:22 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 18 Sep 2007 17:58:22 -0500
Subject: Pseudo-Private Class Attributes
In-Reply-To: <46F054BA.9050709@bigfoot.com>
References: <46F054BA.9050709@bigfoot.com>
Message-ID: <fcpl6r$tum$1@sea.gmane.org>

Ricardo Ar?oz wrote:
> That is self.__attributes
> 
> Been reading about the reasons to introduce them and am a little
> concerned. As far as I understand it if you have a class that inherits
> from two other classes which have both the same name for an attribute
> then you will have a name clash because all instance attributes "wind up
> in the single instance object at the bottom of the class tree".
> 
> Now I guess this means that in any real OOP project you'd better use
> __attr for all your attributes, because classes are usually meant to be
> subclassed and you can never know when you'll be subclassing from two
> classes with attributes with the same name, and I guess you can't take
> the risk of this happening because when it happens it will be hell to
> find out what's going on.
> 
> Is this right?

Multiple inheritance isn't *all* that common, and haphazard multiple inheritance
is even less common. Don't use __attr unless if you have a *specific* need in
front of you, not just an abstract fear of rogue subclassers.

-- 
Robert Kern

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



From paul at boddie.org.uk  Wed Sep 26 08:41:03 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: Wed, 26 Sep 2007 05:41:03 -0700
Subject: setuptools without unexpected downloads
In-Reply-To: <mailman.1109.1190809544.2658.python-list@python.org>
References: <87ejgmklep.fsf@benfinney.id.au><5lumarFae888U1@mid.uni-berlin.de>
	<1190802526.695391.326220@n39g2000hsh.googlegroups.com>
	<5lurorFa92euU1@mid.uni-berlin.de>
	<1190805012.275901.227570@57g2000hsv.googlegroups.com>
	<5luv0iFaai82U1@mid.uni-berlin.de>
	<1190808836.056298.232640@57g2000hsv.googlegroups.com>
	<mailman.1109.1190809544.2658.python-list@python.org>
Message-ID: <1190810463.394249.75090@w3g2000hsg.googlegroups.com>

On 26 Sep, 14:23, Fredrik Lundh <fred... at pythonware.com> wrote:
> Paul Boddie wrote:
> > P.S. Of course, the package maintainer problem manifests itself most
> > prominently on Windows where you often see people asking for pre-built
> > packages or installers.
>
> for the record, I'd love to see a group of volunteers doing stuff like
> this for Windows.  there are plenty of volunteers that cover all major
> Linux/*BSD distributions (tons of thanks to everyone involved in this!),
> but as far as I can remember, nobody has ever volunteered to do the same
> for Windows.

Steve Holden had a certain amount of enthusiasm for this, I believe,
and I note that there's some infrastructure for automatic snapshot
builds of Python for Windows now. Perhaps there's some cross-over with
the buildbot operators, too.

Paul



From bdesth.quelquechose at free.quelquepart.fr  Sun Sep 23 12:08:40 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 23 Sep 2007 18:08:40 +0200
Subject: Delete values from a string using the index
In-Reply-To: <1190838311.630506.64670@y42g2000hsy.googlegroups.com>
References: <1190838311.630506.64670@y42g2000hsy.googlegroups.com>
Message-ID: <46fac121$0$17623$426a74cc@news.free.fr>

koutoo at hotmail.com a ?crit :
> How do I delete or remove values from a list

del

> or string

You can't. Python's strings are immutables.

> using the
> index.
> 
> If a = [1,2,3,4,5,6,7,8] and I want to get rid of 1 -5, how would I do
> that?

del a[0:5]
print a



From ldo at geek-central.gen.new_zealand  Mon Sep 10 03:56:07 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Mon, 10 Sep 2007 19:56:07 +1200
Subject: concise code (beginner)
References: <13dsvqrqivtf092@corp.supernews.com>
	<13dv4uqqb806ff0@corp.supernews.com> <fbqo83$8fd$1@lust.ihug.co.nz>
	<13e99756io95p66@corp.supernews.com> <fc2c86$i1l$4@lust.ihug.co.nz>
	<13e9taoa44icgb4@corp.supernews.com>
Message-ID: <fc2tan$rik$5@lust.ihug.co.nz>

A: Skid-marks in front of the hedgehog.
Q: What's the difference between a dead hedgehog on the road, and a dead
top-poster on the road?


From steve at REMOVE-THIS-cybersource.com.au  Thu Sep  6 12:42:56 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Thu, 06 Sep 2007 16:42:56 -0000
Subject: initializing cooperative method
References: <1189095131.853954.233660@r34g2000hsd.googlegroups.com>
Message-ID: <13e0bgg5lo0p2ec@corp.supernews.com>

On Thu, 06 Sep 2007 16:12:11 +0000, jelle wrote:

> Hi,
> 
> I'm writing a bunch of abstract classes and I'd like to delegate the
> arguments of the concrete class the to abstract one. I was surprised to
> see that the print statement in the abstract class isn't executed. But
> moreover, I'd like to find out an idiom that allows one to delegate
> arguments in the inherited class. Any ideas?

Change the call to super() in Concrete from:

super(Abstract, self).__init__(a, b)

to

super(Concrete, self).__init__(a, b)



-- 
Steven.



From Summercoolness at gmail.com  Sun Sep 30 06:47:13 2007
From: Summercoolness at gmail.com (Summercool)
Date: Sun, 30 Sep 2007 10:47:13 -0000
Subject: which language allows you to change an argument's value?
Message-ID: <1191149233.346818.246170@22g2000hsm.googlegroups.com>


I wonder which language allows you to change an argument's value?
like:

foo(&a) {
  a = 3
}

n = 1
print n

foo(n)     # passing in n, not &n
print n

and now n will be 3.  I think C++ and PHP can let you do that, using
their reference (alias) mechanism.  And C, Python, and Ruby probably
won't let you do that.  What about Java and Perl?

is there any way to prevent a function from changing the argument's
value?

isn't "what i pass in, the function can modify it" not a desireable
behavior if i am NOT passing in the address of my argument?  For one
thing, if we use a module, and call some functions in that module, and
the module's author made some changes to his code, then we have no way
of knowing what we pass in could get changed.  Of course, if it is in
Java, Python, and Ruby, and we pass in a reference to object (not C+
+'s meaning of alias reference), so the object can get changed, but
that can be expected, vs passing in n, when n = 1.  Even when it is
Ruby, when everything is an object, passing n in when n = 1 won't ever
make n become 3.  Is there a way to prevent it from happening in the
languages that allows it?



From perl4hire at softouch.on.ca  Thu Sep 13 11:43:27 2007
From: perl4hire at softouch.on.ca (Amer Neely)
Date: Thu, 13 Sep 2007 11:43:27 -0400
Subject: Coming from Perl
In-Reply-To: <iPcGi.357$372.115@read2.cgocable.net>
References: <Cv%Fi.198$372.59@read2.cgocable.net>	<1189644803.816375.269950@y42g2000hsy.googlegroups.com>	<b46Gi.221$372.100@read2.cgocable.net>	<87y7fa52ru.fsf@benfinney.id.au>	<jWaGi.224$372.55@read2.cgocable.net>	<mailman.485.1189691416.2658.python-list@python.org>	<d9cGi.356$372.131@read2.cgocable.net>
	<mailman.489.1189695918.2658.python-list@python.org>
	<iPcGi.357$372.115@read2.cgocable.net>
Message-ID: <6TcGi.358$372.125@read2.cgocable.net>

Amer Neely wrote:
> Richie Hindle wrote:
>>> [Amer]
>>> #!/usr/bin/python
>>> [...] On my home PC [...]
>>> [Thu Sep 13 04:16:03 2007] [error] [client 0.0.0.0] (OS 2)The system 
>>> cannot find the file specified.
>>
>> That's because on your home PC Python is somewhere like
>> C:\Python25\python.exe, not /usr/bin/python.
>>
>> Are you sure /usr/bin/python is correct for your hosting environment?
>>
> 
> It's my understanding that the Windows shell doesn't pay much attention 
> to the shebang line if the file type is associated with the proper 
> application.
> 
> But I tried your suggestion and got the same results.
> 

My BAD! I changed the shebang all right, but entered a typo. With the 
correct path it did work just fine.

So, perhaps the path to python on my host is wrong? I got that one right 
from the techs.

-- 
Amer Neely
w: www.webmechanic.softouch.on.ca/
Perl | MySQL programming for all data entry forms.
"Others make web sites. We make web sites work!"


From gregpinero at gmail.com  Thu Sep 27 15:35:45 2007
From: gregpinero at gmail.com (gregpinero at gmail.com)
Date: Thu, 27 Sep 2007 12:35:45 -0700
Subject: How to Catch Errors in SimpleXMLRPCServer
Message-ID: <1190921745.575519.53560@y42g2000hsy.googlegroups.com>

I have a pretty simple XMLRPCServer, something along the lines of the
example:

server = SimpleXMLRPCServer(("localhost", 8000))
server.register_function(pow)
server.register_function(lambda x,y: x+y, 'add')
server.serve_forever()

Now what I want to do is catch any errors that happen on requests, and
ideally have them emailed to me.  I have the email part all taken care
of, I just need to know how to get at the exceptions.

Thanks in advance for any help,

Greg



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Sep 27 05:56:53 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 27 Sep 2007 11:56:53 +0200
Subject: "No backend servers available" using httplib
In-Reply-To: <1190884447.792688.107710@g4g2000hsf.googlegroups.com>
References: <1190884447.792688.107710@g4g2000hsf.googlegroups.com>
Message-ID: <46fb7e40$0$29672$426a74cc@news.free.fr>

Henrik Lied a ?crit :
> Hi there!
> 
> I'm using a recipe found on ASPN [1] to upload some data to an
> external server.
> 
> The request fails, and all I get in response is "No backend servers
> available".
> 
> So I'm wondering: Is this a known exception-message in httplib,

If it was, you should have a full traceback then.

> or
> could it be an error in the requested external resource?


> [1]: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/146306

 From the recipe's code and the message, looks like you're connecting to 
(or via) a proxy which fails to relay to the real server.


From steve at holdenweb.com  Mon Sep 17 07:24:40 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 17 Sep 2007 07:24:40 -0400
Subject: Reading text files where last line has no EOL
In-Reply-To: <1190027021.235110.286450@g4g2000hsf.googlegroups.com>
References: <1190027021.235110.286450@g4g2000hsf.googlegroups.com>
Message-ID: <46EE63F8.8060703@holdenweb.com>

BlueBird wrote:
> I tried and failed to read text files where the last line does not
> contain proper EOL. For my tests, I use a file that I create with the
> equivalent of :
> 
> open('toto', 'w').write( '1234\n4567\n89AB' )
> 
> 
> My reading code looks like this :
> 
>        l = f.readline()
>         while len(l):
>             self.appendLine( l )
>             l = f.readline()
> 
> The last line is not returned (89AB) is never returned.
> 
> I tried with "for l in f" with similar results.
> 
> I read the doc :
> 
> In order to make a for loop the most efficient way of looping over the
> lines of a file (a very common operation), the next() method uses a
> hidden read-ahead buffer. As a consequence of using a read-ahead
> buffer, combining next() with other file methods (like readline())
> does not work right. However, using seek() to reposition the file to
> an absolute position will flush the read-ahead buffer. New in version
> 2.3.
> 
> I've tried to do a f.seek( f.tell() ) but that did not help.
> 
> So how am I supposed to fetch that last line ?
> 
What version of Python are you using, and on what platform? WJFFM on 
2.5.1/Cygwin:

 >>> open('toto', 'w').write( '1234\n4567\n89AB' )
 >>> for l in open('toto'):
...   print l
...
1234

4567

89AB
 >>>

You will observe that the last line is presented, but correctly does not 
include a trailing line feed.

regards
  Steve

-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline


From koutoo at hotmail.com  Thu Sep 20 12:22:11 2007
From: koutoo at hotmail.com (koutoo at hotmail.com)
Date: Thu, 20 Sep 2007 09:22:11 -0700
Subject: Lookup values from one table to another based on a value
In-Reply-To: <46f2930a$0$9505$426a74cc@news.free.fr>
References: <1190298876.689060.44540@d55g2000hsg.googlegroups.com>
	<46f2930a$0$9505$426a74cc@news.free.fr>
Message-ID: <1190305331.584560.218880@g4g2000hsf.googlegroups.com>

On Sep 20, 10:34 am, Bruno Desthuilliers <bruno.
42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> kou... at hotmail.com a ?crit :
>
>
>
>
>
> > If I wanted to accomplish looking up values from one table based on a
> > value from another table or file, how would I go about doing this in
> > Python?  Would I build a dictionary or an array?
>
> > exp:
>
> > Table1:
>
> > Site = 103
> > Lane = 2
> > Dir = ?  # Get this from Table2
>
> > Table2:
>
> > Site, Lane, Direction,
> > 103, 1, 1
> > 103, 2, 1
> > 103, 3, 5
> > 103, 4, 5
>
> > Normally in Access I would just use a Dlookup and be done with it, or
> > use a Recordset in VB.  Thanks guys.
>
> What about using a database ? Like SQLite ?
>
> Else, the canonical data structure for quick lookups is of course the dict.- Hide quoted text -
>
> - Show quoted text -


Ah, yes, that would appear to be a better means to retrieve data.  I
visited the site, which version should I download?  Thanks.

Kou



From rave247 at seznam.cz  Thu Sep  6 14:07:57 2007
From: rave247 at seznam.cz (=?us-ascii?Q?rave247=20rave247?=)
Date: Thu, 06 Sep 2007 20:07:57 +0200 (CEST)
Subject: =?us-ascii?Q?Re=3A=20Getting=20original=20working=20directory?=
In-Reply-To: <1189092734.750184.317490@y42g2000hsy.googlegroups.com>
Message-ID: <12.1809-14479-787046656-1189102077@seznam.cz>

"......the *original* directory location *after* os.chdir() is performed......" os.getcwd() is not helping much as it returns the location that was set up in os.chdir() call

Thanks


> ------------ P?vodn? zpr?va ------------
> Od: Gabriel Genellina <gagsl-py2 at yahoo.com.ar>
> P?edm?t: Re: Getting original working directory
> Datum: 06.9.2007 17:35:51
> ----------------------------------------
> On 6 sep, 12:19, rave247 rave247 <rave... at seznam.cz> wrote:
> 
> > I' am unable to solve this problem. I've got python program, it is installed
> in standard location. I run this program from some location X (note that I just
> type relative "myscript", leaving operating system to look up script itself
> using PATH variable) and this program somewhere in the code calls os.chdir() to
> change it is current working directory and I would need in python code to get
> the *original* directory location *after* os.chdir() is performed. This means
> the location X from which script was performed - it is the location I am in
> after script is finished.
> 
> Use os.getcwd()
> http://docs.python.org/lib/os-file-dir.html
> 
> --
> Gabriel Genellina
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 
> 
> 


From Erik-wikstrom at telia.com  Sun Sep 30 13:53:24 2007
From: Erik-wikstrom at telia.com (=?UTF-8?B?RXJpayBXaWtzdHLDtm0=?=)
Date: Sun, 30 Sep 2007 17:53:24 GMT
Subject: which language allows you to change an argument's value?
In-Reply-To: <1191170989.227928.252880@g4g2000hsf.googlegroups.com>
References: <1191149233.346818.246170@22g2000hsm.googlegroups.com>
	<f891e9884d1151a8d46e8be15e43b788@ruby-forum.com>
	<1191170989.227928.252880@g4g2000hsf.googlegroups.com>
Message-ID: <ooRLi.10072$ZA.6664@newsb.telia.net>

On 2007-09-30 18:49, Summercool wrote:
> On Sep 30, 4:18 am, 7stud -- <dol... at excite.com> wrote:
>> SpringFlowers AutumnMoon wrote:
>> > we have no way
>> > of knowing what we pass in could get changed.
>>
>> Sure you do.  You look at the function's signature.  In order to use
>> someone else's library, you have to know the function's signature.  And
>> the signature explicitly tells you whether the value you pass in could
>> be changed.
> 
> do you mean in C++?  I tried to find signature in two C++ books and it
> is not there.  Google has a few results but it looks something like
> prototype.  Is signature the same as the function prototype in the .h
> file?

A signature is what is required to identify a function and includes
return type, name of function and the types of the parameters, while it
looks just like a prototype it is not. A prototype is something you
write to satisfy your compiler while a signature identifies a function.
Below are some examples of signatures, only the last can modify the
values of its parameter.

  void foo(int, float)
  std::string bar(const std::string&, int, int)
  void baz(std::string&)

> If so, don't we usually just include <___.h> and forget about
> the rest.  Documentation is fine although in some situation, the
> descriptions is 2 lines, and notes and warnings are 4, 5 times that,
> and the users' discussing it, holding different opinion is again 2, 3
> times of that length.

Unless you read the documentation how do you know which files to
include? And what documentation are you reading which does not clearly
specify the functionality of the functions described?

> I think in Pascal and C, we can never have an
> argument modified unless we explicitly allow it, by passing in the
> pointer (address) of the argument.

In C++ the arguments cannot be modified unless you either pass a pointer
to a non-const object or a non-const reference, so it is just as
explicit. (Notice that it is possible to cast the constness away, but
doing is extremely dangerous and should not be done.)

> also i think for string, it is a bit different because by default,
> string is a pointer to char or the address of the first char in C and C
> ++.  So it is like passing in the address already.

No. A string in C++ is a string, a char array or a pointer to a char is
something different.

> it is when the
> argument n is something like 1 that makes me wonder.


Get a good book on whatever language you are interested in (I do not
know which it is since you are all over the place) and read up on that
languages references, if you still do not understand after that ask your
questions in the group discussing that language.

-- 
Erik Wikstr?m


From cmpython at gmail.com  Mon Sep 24 19:26:01 2007
From: cmpython at gmail.com (cmpython at gmail.com)
Date: Mon, 24 Sep 2007 23:26:01 -0000
Subject: calling the function of one class from another class
In-Reply-To: <mailman.1006.1190658483.2658.python-list@python.org>
References: <33dffc910709220024l74b14267v93564df10f5af9a6@mail.gmail.com>
	<3a4a8f930709220328h1ae25d10jd772e265cd298bcd@mail.gmail.com>
	<mailman.1006.1190658483.2658.python-list@python.org>
Message-ID: <1190676361.733698.90120@19g2000hsx.googlegroups.com>

On Sep 24, 2:27 pm, Steve Holden <st... at holdenweb.com> wrote:
> Furkan Kuru wrote:
>
> > On 9/22/07, *Mridula Ramesh* <mridula.c... at gmail.com
> > <mailto:mridula.c... at gmail.com>> wrote:
>
> >     hi.
>
> >     i currently have code structured like this:
>
> >         classA():
> >             def __init__():
> >              ..............
> >              ..............
>
> >             def fnc1():
> >             ....................
> >             ....................
>
> >         classB():
> >            def __init__():
> >             ........................
> >             ........................
> >             classA.fnc1()    #this is where i get an error
>
> >     TypeError: unbound method fnc1() must be called with classA instance
> >     as first argument (got nothing instead)
>
> >     when i do  fnc1(classA) i get:
>
> >     NameError: global name 'fnc1' is not defined
>
> >     am i violating some programming rule by trying to call fnc1 in
> >     classB? i am only now learning OO alongside python, so i'm not sure!
> >     also, can someone please tell me where to go for more articles on
> >     the classes and functions and calling them from other places?
>
> >     thanks a lot!
>
> >     mridula.
>
> >     --
> >    http://mail.python.org/mailman/listinfo/python-list
> >     <http://mail.python.org/mailman/listinfo/python-list>
>
> > you should create an instance of ClassA:
>
> > a = ClassA()
> > a.fnc1()
>
> Unfortunately this won't work either, as calling the method on an
> instance will automatically provide the instance as the first argument
> to the method call, but the method is defined to take no arguments.
>
> > or if you want a static function you should declare the method as static
>
> > classA():
> >     def __init__():
> >      ..............
> >      ..............
> >     @staticmethod
> >     def fnc1():
> >     ....................
> >     ....................
>
> Although most often if you want a static function you should just define
> ... a function!
>
> The OP should read through the tutorial, or at least those sections
> dealing with function and class definitions. It appears (s)he may be
> trying to write Java in Python. That's never a satisfactory experience.

If the OP is not familiar with programming in general the official
Python
tutorial is probably hard to "get".  It's written for other
programmers
from C++ or other languages so they know what is different about
Python.

One way the OP could go is to (and yes this actually is mentioned in
that
section of the tutorial) add "self" to the fnc1 so that when you call
it from within classB the number of arguments--1--match, like:

classA():
    def __init__():
        def fnc1(self):

classB():
    def __init__():
         a = ClassA()
         a.fnc1()

Is there another way without having to add self to fnc1?



From allenbryant2 at tmail.com  Thu Sep  6 00:30:29 2007
From: allenbryant2 at tmail.com (Allen Bryant)
Date: Wed, 5 Sep 2007 21:30:29 -0700
Subject: GREAT VIDEO! >> http://www.tbn.org/films/videos/To_Hell_And_Back.ram
	<< Just click link to view the free video.......... May 22,
	2005 7:37:11 pm
Message-ID: <1189053034.340D15F5@dk12.dngr.org>

Allen and jessica
Bryant24--
Sent from my T-Mobile Sidekick?

From ruoyu0088 at gmail.com  Wed Sep 26 04:42:25 2007
From: ruoyu0088 at gmail.com (HYRY)
Date: Wed, 26 Sep 2007 01:42:25 -0700
Subject: the address of list.append and list.append.__doc__
In-Reply-To: <46fa102d$0$26322$426a74cc@news.free.fr>
References: <1190775258.351819.24930@22g2000hsm.googlegroups.com>
	<mailman.1077.1190776788.2658.python-list@python.org>
	<1190780557.879816.13800@d55g2000hsg.googlegroups.com>
	<46fa102d$0$26322$426a74cc@news.free.fr>
Message-ID: <1190796145.444227.191030@y42g2000hsy.googlegroups.com>

> There's no such thing as an "original method" - what's stored as an
> attribute of the class is a plain function. FWIW, you can get at this
> function quite easily - via the im_func attribute of the method.

I know about im_func, but I tried the im_func attribute of append and
I get error: 'builtin_function_or_method' object has no attribute
'im_func'
a = [1,2,3]
a.append.im_func # error

> Now what I wonder is what you want to do with the internal identifier of
> a function or method ? (please not that the use of the memory address as
> an id is purely an implementation detail of CPython).

I want to use the function( or id of the function) as a key of dict,
d = {}
d[list.append] = "abc"
d[str.find] = "..."

and I want a function f, that return list.append when call as
f(a.append), so I can get the value in d by d[f(a.append)].

And I also find these is interesting, methods of an unmutable object
can be used as key, but methods of a mutable object cannot:

a = [1,2,3]
d[a.append] = "..." # error: list objects are unhashable
b = "123"
d[b.find] = "..." # OK



From kar1107 at gmail.com  Thu Sep 20 00:02:03 2007
From: kar1107 at gmail.com (Karthik Gurusamy)
Date: Thu, 20 Sep 2007 04:02:03 -0000
Subject: Sets in Python
In-Reply-To: <13f3m15igkstq2e@corp.supernews.com>
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
	<CeB*qHeVr@news.chiark.greenend.org.uk>
	<1190235483.412972.81280@v23g2000prn.googlegroups.com>
	<13f3m15igkstq2e@corp.supernews.com>
Message-ID: <1190260923.243865.312190@z24g2000prh.googlegroups.com>

On Sep 19, 7:17 pm, Steven D'Aprano <st... at REMOVE-THIS-
cybersource.com.au> wrote:
> On Wed, 19 Sep 2007 20:58:03 +0000, Karthik Gurusamy wrote:
> > While it's easy to explain the behavior, I think the decision to dis-
> > allow mutable items as keys is a bit arbitrary. There is no need for
> > dict to recompute hash
>
> What???
>
> Of course it does. How else can it look up the key? Because it (somehow)
> just recognizes that it has seen the key before? How? By magic?

You answered it yourself later. For a mapping service, hash is just
one way to do things. What you need is for each item in the
collection, a unique key.
How you go from the key to the value is not something a programmer
needs to know.
Your mind is set on thinking on hash alone and hence you don't see
beyond it.

>
> > (first of all, a user doesn't even need to know
> > if underneath 'hashing' is used -- the service is just a mapping between
> > one item to another item).
>
> The user doesn't need to know the mechanism, but the dict does. Dicts are
> implemented as hash tables. I suppose they could be implemented as
> something else (what? linear lists? some sort of tree?) but the same
> considerations must be made:

Oh yes. If the keys are all integers (or any set of items that can be
ordered), why not an avl. It has guaranteed O(log N) while a hash in
worst case is O(N). Why you want to tie yourself to the drawbacks of
one datastructure? Understand your goal is not to provide a hash; but
to provide a mapping service.


 the dict must be able to find keys it has
> seen before. How is the dict supposed to recognise the key if the key has
> changed?
>
> > Since we know hashing is used, all that is needed is, a well-defined way
> > to construct a hash out of a mutable. "Given a sequence, how to get a
> > hash" is the problem.
>
> Nonsense. That's not the problem. The problem is how to get exactly the
> same hash when the sequence has changed.

Yes, if you keep thinking hash is the only tool you got.

>
> In other words, if you have two mutable objects M1 and M2, then you
> expect:
>

No. I don't expect. I expect the hash to be different. Why do you keep
thinking it's the mappings responsibility to take care of a changing
key.

> hash(M1) == hash(M2) if and only if M1 and M2 are equal
> hash(M1) != hash(M2) if M1 and M2 are unequal
>
> but also:
>
> if M1 mutates to become equal to M2, hash(M1) must remain the same while
> still being different from hash(M2).
>
> That means that hash() now is a non-deterministic function. hash([1,2,3])
> will vary according to how the list [1,2,3] was constructed!
>
> Obviously something has to give, because not all of these things are
> mutually compatible.
>
> > If later the given sequence is different, that's
> > not the dict's problem.
>
> Data structures don't have problems. Programmers do. And language
> designers with sense build languages that minimize the programmers
> problems, not maximize them.

Yes, here you talk about a different goal altogether. Here comes the
'arbitrary' part I mentioned.

>
> > So if the list changes, it will result in a different hash and we will
> > get a hash-miss. I doubt this is in anyway less intuitive than dis-
> > allowing mutable items as keys.
>
> The choices for the language designer are:
>
> (1) Invent some sort of magical non-deterministic hash function which
> always does the Right Thing.

Nope, just say if the new sequence is different, you don't find the
item in the dict.

>
> (2) Allow the hash of mutable objects to change, which means you can use
> mutable objects as keys in dicts but if you change them, you can no
> longer find them in the dict. They'll still be there, using up memory,
> but you can't get to them.

In the new model, at the time of addition, you need to remember the
key at that time. If it's a list, you make a copy of the items.

>
> (3) Simply disallow mutable objects as keys.
>
> Alternative 1 is impossible, as we've seen, because the requirements for
> the Right Thing are not mutually compatible.
>
> Alternative (2) leads to hard-to-find, hard-to-diagnose bugs where you
> store objects in a dict only for them to mysteriously disappear later.
> Worse, it could lead to bugs like the following hypothetical:

Of course they can be reached with.. for k in dict...
>
> >>> M = [1, 2, 3]
> >>> D = {M: 'parrot'} # pretend this works
> >>> D
>
> {[1, 2, 3]: 'parrot'}>>> M.append(4)
> >>> D
>
> {[1, 2, 3, 4]: 'parrot'}>>> D[[1, 2, 3, 4]]

No, in the new way, the key still remains [1, 2, 3]
What was changed is M. Not the  key given to dict at the time of
addition.
Again I'm not describing today's behavior; it's in the new way.

>
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> KeyError: [1, 2, 3, 4]
>
> Try explaining that one to programmers: they can SEE the key in the dict
> when they print it, but they can't get it or delete it because the hash
> has changed.

No they don't. They see the key at the time of addition ([1,2,3])
>
> Alternative 3 is easy to deal with: simply don't use mutable objects as
> keys. That's what Python does. Sure, the programmer sometimes needs to
> work around the lack (convert the list into a tuple, or a string, or
> pickle it, whatever...) which on rare occasions is hard to do, but at
> least there are no mysterious, hard to track down bugs.

When I first saw key's must'be be mutable, it did appear to me to be
mysterious. There was unnecessary tighter coupling between
implementation details and the service exposed to the programmer. (As
I see it, the root cause of all this is, the dict does not make a copy
of the key at the time of item addition, it just makes a new reference
to the same object)

Karthik

>
> --
> Steven.




From arnau at ehas.org  Thu Sep  6 07:47:05 2007
From: arnau at ehas.org (Arnau Sanchez)
Date: Thu, 06 Sep 2007 13:47:05 +0200
Subject: Text processing and file creation
In-Reply-To: <1189027060.889829.282510@r34g2000hsd.googlegroups.com>
References: <1189008809.718361.45790@g4g2000hsf.googlegroups.com>	<1189024097.175349.221210@w3g2000hsg.googlegroups.com>
	<1189027060.889829.282510@r34g2000hsd.googlegroups.com>
Message-ID: <46DFE8B9.400@ehas.org>

malibuster at gmail.com escribi?:

> I am still wondering how to do this efficiently in Python (being kind
> of new to it... and it's not for homework).

You should post some code anyway, it would be easier to give useful advice (it 
would also demonstrate that you put some effort on it).

Anyway, here is an option. Text-file objects are line-iterable, so you could use 
itertools (perhaps a bit difficult module for a newbie...):

from itertools import islice, takewhile, repeat

def take(it, n):
     return list(islice(it, n))

def readnlines(fd, n):
     return takewhile(bool, (take(fd, n) for _ in repeat(None)))

def splitfile(path, prefix, nlines, suffix_digits):
     sformat = "%%0%dd" % suffix_digits
     for index, lines in enumerate(readnlines(file(path), nlines)):
         open("%s_%s"%(prefix, sformat % index), "w").writelines(lines)

splitfile("/etc/services", "out", 5, 4)

arnau


From gagsl-py2 at yahoo.com.ar  Mon Sep 17 16:08:01 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 17 Sep 2007 17:08:01 -0300
Subject: =?utf-8?Q?I=C2=B4m_trying_to_desenvolve_a_site_in_?=
	=?utf-8?Q?python?=
References: <1190051850.198096.258890@o80g2000hse.googlegroups.com>
	<5l7uglF6kto9U1@mid.individual.net>
	<1190053707.193010.159350@n39g2000hsh.googlegroups.com>
Message-ID: <op.tytd7ne7x6zn5v@a98gizw.cpe.telecentro.net.ar>

En Mon, 17 Sep 2007 15:28:27 -0300, Arnaud Delobelle  
<arnodel at googlemail.com> escribi?:

> On Sep 17, 7:14 pm, Bjoern Schliessmann <usenet-
> mail-0306.20.chr0n... at spamgourmet.com> wrote:
>> Andre P.S Duarte wrote:
>> > I?m trying to desenvolve a site in python.
>>
>> What does "desenvolve" mean? By "site", do you mean a web site?
>>
>
> "desenvolver" is a spanish verb meaning "to develop".

Yes, but more likely the OP has a Portuguese/Brazilian origin, and the  
word exists in that language too.
Going on topic, a good starting point is  
http://wiki.python.org/moin/WebFrameworks

-- 
Gabriel Genellina



From bignose+hates-spam at benfinney.id.au  Thu Sep 27 22:30:51 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 28 Sep 2007 12:30:51 +1000
Subject: Python 3.0 migration plans?
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>
Message-ID: <87641v4j38.fsf@benfinney.id.au>

TheFlyingDutchman <zzbbaadd at aol.com> writes:

> It seems that Python 3 is more significant for what it removes than
> what it adds.

That's certainly the focus of an explicitly backward-incompatible
upgrade, yes.

> What are the additions that people find the most compelling?

Most of the additions that will go into 2.6 are doing so because
they'll appear in 3.0. That's a benefit: anything from 3.0 that makes
sense to add to 2.6 will go in; the rest of 3.0's changes are mostly
backwards-incompatible (i.e. removals and conflicting changes).

I find the following compelling:

  - 'str' becomes Unicode type, 'int' becomes unified-int-and-long
    type <URL:http://www.python.org/dev/peps/pep-3100/>

  - Consistent, unambiguous integer literal syntax
    <URL:http://www.python.org/dev/peps/pep-3127/> and the 'bytes'
    type for non-text strings
    <URL:http://www.python.org/dev/peps/pep-3112/>

  - Default source encoding is UTF-8
    <URL:http://www.python.org/dev/peps/pep-3120/> and support for
    non-ASCII identifiers
    <URL:http://www.python.org/dev/peps/pep-3131/>

  - Reorganisation of the standard library for consistency
    <URL:http://www.python.org/dev/peps/pep-3108/>

  - Renaming raw_input to input, so 'input()' does the obvious thing
    <URL:http://www.python.org/dev/peps/pep-3111/>

  - Clarification of 'raise' and 'except' semantics
    <URL:http://www.python.org/dev/peps/pep-3109/>,
    <URL:http://www.python.org/dev/peps/pep-3110/>

  - Abstract Base Classes
    <URL:http://www.python.org/dev/peps/pep-3119/>

  - everything that's being added to 2.6 :-)

-- 
 \      "I bought a self learning record to learn Spanish. I turned it |
  `\        on and went to sleep; the record got stuck. The next day I |
_o__)                could only stutter in Spanish."  -- Steven Wright |
Ben Finney


From mail at microcorp.co.za  Thu Sep 27 02:52:03 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 27 Sep 2007 08:52:03 +0200
Subject: Google and Python
References: <1190228512.627109.308910@n39g2000hsh.googlegroups.com><ufadnRC5BPZm6GzbnZ2dnUVZ_jOdnZ2d@comcast.com><1190231094.276099.136250@22g2000hsm.googlegroups.com><mailman.781.1190232163.2658.python-list@python.org><1190235678.019823.315850@o80g2000hse.googlegroups.com><mailman.887.1190402873.2658.python-list@python.org><7xejgr68pm.fsf@ruckus.brouhaha.com><slrnffetai.ijq.nick@irishsea.home.craig-wood.com><mailman.1031.1190705678.2658.python-list@python.org><7xps07w5g3.fsf@ruckus.brouhaha.com><mailman.1088.1190791009.2658.python-list@python.org>
	<slrnffk82a.krt.nick@irishsea.home.craig-wood.com>
Message-ID: <004001c800d2$e96e20e0$03000080@hendrik>

"Nick Craig-Wood" <....od.com> wrote:

> Hendrik van Rooyen <ma.....p.co.za> wrote:
> >  "Paul Rubin" <http://lid> wrote:
> >
> > > "Hendrik van Rooyen" <m..orp.co.za> writes:

> >  Ok got it - so instead of starting a thread, as is current practice, you
fork
> >  a process (possibly on another machine) and "hand over" the client.
>
> It is trivial to pass a socket to a new thread or a forked child - you
> don't need this mechanism for that.  It doesn't work on different
> machines though - it has to be on the same machine.

8< ------------- nice explanation by Nick-----------------------

How does a very large volume site work then? - there must be some
way of sharing the load without bottlenecking it through one machine?

- Hendrik



From bdesth.quelquechose at free.quelquepart.fr  Thu Sep 27 15:50:26 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 27 Sep 2007 21:50:26 +0200
Subject: ValueError: too many values to unpack,>>>
In-Reply-To: <mailman.1183.1190921081.2658.python-list@python.org>
References: <mailman.1169.1190911027.2658.python-list@python.org>	<5m24sfFatlbuU1@mid.uni-berlin.de>	<46FBED79.6070207@comcast.net>	<fdgs2t$8ni$1@sea.gmane.org>
	<mailman.1183.1190921081.2658.python-list@python.org>
Message-ID: <46fc09ae$0$22333$426a74cc@news.free.fr>

Shawn Minisall a ?crit :
> Fredrik Lundh wrote:
> 
>> Shawn Minisall wrote:
>>
>>  
>>
>>> Sorry, it looks like it's on the fourth line with the 3 values on 
>>> line 4...its reading line 3 fine
>>>
>>> Traceback (most recent call last):
>>>   File "<pyshell#0>", line 1, in <module>
>>>     main()
>>>   File "I:\COMPUTER PROGRAMMING CLASS\PROJECT #1\project1.py", line 
>>> 33, in main
>>>     deposit1, deposit2, deposit3 = string.split(line, "\t")
>>> ValueError: too many values to unpack
>>>     
>>
>>
>> instead of fumbling around in the dark, try inserting a print 
>> statement before the offending line, so you can see what you're trying 
>> to unpack:
>>
>>      print string.split(line, "\t") # see what it is
>>      deposit1, deposit2, deposit3 = string.split(line, "\t")
>>
>> </F>
>>   
> 
> I did and it printed everything up until the 3rd line with 3 numbers for 
> deposits.  I have since figured it out...the teacher put in an extra tab 
> after the last value so python thought it was 4 values for three.  I 
> went back into the file and deleted the extra tab after the 3rd number 
> and saved it...now it's working fine.
> I'm going to kill her...

You'd better learn how to deal with "this-cant-happen-here" situation, 
because it's how it is in real-life.



From hniksic at xemacs.org  Wed Sep 26 05:01:06 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Wed, 26 Sep 2007 11:01:06 +0200
Subject: the address of list.append and list.append.__doc__
References: <1190775258.351819.24930@22g2000hsm.googlegroups.com>
	<mailman.1077.1190776788.2658.python-list@python.org>
	<1190780557.879816.13800@d55g2000hsg.googlegroups.com>
	<mailman.1083.1190785973.2658.python-list@python.org>
	<1190788149.477809.80130@g4g2000hsf.googlegroups.com>
Message-ID: <87odfpls19.fsf@mulj.homelinux.net>

HYRY <ruoyu0088 at gmail.com> writes:

> This works, but I think the key of DOC is too long, so I want to use
> the id of list.append.__doc__ as the key; or use the id of
> list.append:

Using the id is not a good idea because id's are not permanent.  Using
list.append as the hash key will work and will internally use the
pointer to produce the hash key, which is probably what you want
anyway.

> So, I asked how to get list.append from a.append

>>> def unbound(meth):
...   return getattr(type(meth.__self__), meth.__name__)
...
>>> unbound(a.append)
<method 'append' of 'list' objects>

> and why id(list.append.__doc__) changes.

Because the doc for builtins is internally kept in a read-only C
string for efficiency.  The Python string is built only when actually
used.


From dimitri.pater at gmail.com  Wed Sep  5 17:32:25 2007
From: dimitri.pater at gmail.com (dimitri pater)
Date: Wed, 5 Sep 2007 23:32:25 +0200
Subject: StringIO MySQL data blob Image problem
In-Reply-To: <e75321bd0709051426o6a0499efn2ba4d58908101bca@mail.gmail.com>
References: <e75321bd0709050553h5e3302f7lf59f10104895ff5d@mail.gmail.com>
	<46DEAAAB.8040008@timgolden.me.uk>
	<e75321bd0709051213h686122d0w63318b1f16d2b509@mail.gmail.com>
	<e75321bd0709051214t23ab465do47bb75d2f9dae024@mail.gmail.com>
	<e75321bd0709051426o6a0499efn2ba4d58908101bca@mail.gmail.com>
Message-ID: <e75321bd0709051432x43dd75f2wb59459eabc481534@mail.gmail.com>

ah, sorry
a+=1 should be after 'Do stuff here'  of course...


On 9/5/07, dimitri pater <dimitri.pater at gmail.com> wrote:
> Hi,
> the following code works when inserting images in reportlab tables:
>
> (result4 is a query result)
> a=0
> for i in result4:
>            cfoto = StringIO()
>            cfoto.write(result4[a][9].tostring())
>            dfoto = cfoto.getvalue()
>            fileFoto = open(str(a)+'temp.jpg','wb')
>            fileFoto.write(dfoto)
>            fileFoto.close()
>            foto = Image(str(a)+'temp.jpg')
>            a+=1
>
>           Do stuff here (insert the Image)
>
> The problem with this code is that I need to create a unique file
> (str(a)+'temp.jpg'), I tried to use a single temp.jpg but it kept
> using the data from the first record. Tried flush(), truncate(0), but
> it didn't work. (My mistake probably ;-)
> But the images show in the PDF so that's fine for now.
>
> On 9/5/07, dimitri pater <dimitri.pater at gmail.com> wrote:
> > ---------- Forwarded message ----------
> > From: dimitri pater <dimitri.pater at gmail.com>
> > Date: Sep 5, 2007 9:13 PM
> > Subject: Re: StringIO MySQL data blob Image problem
> > To: Tim Golden <mail at timgolden.me.uk>
> >
> >
> > > Well, I'm mystified. Not by your results: that exactly what I
> > > expected to get, but because you're doing everything *except*
> > > manipulating an image and putting it into a PDF via ReportLab.
> > >
> > Dear Tim,
> > you are right of course, I have been trying to put the StringIO in a temp file:
> > cfoto=StringIO
> > cfoto.write(result[0][1].tostring())
> > dfoto=cfoto.getvalue()
> > fileFoto=open('temp.jpg','wb')
> > fileFoto.write(dfoto)
> >
> > and indeed, the blob from MySQL is saved as an image!
> > however,
> > foto= Image('temp.jpg')
> > and inserting foto into a table results in:
> > x = struct.unpack('B', image.read(1))
> > error: unpack str size does not match format
> > oh, well... still needs some work
> > BTW: I used 'local' images before (I mean they did not originate from
> > a DB), that worked well in Reportlab's tables.
> > Thanks, I am getting there (I think)
> >
> >
> > --
> > ---
> > You can't have everything. Where would you put it? -- Steven Wright
> > ---
> > please visit www.serpia.org
> >
>
>
> --
> ---
> You can't have everything. Where would you put it? -- Steven Wright
> ---
> please visit www.serpia.org
>


-- 
---
You can't have everything. Where would you put it? -- Steven Wright
---
please visit www.serpia.org


From duncan.booth at invalid.invalid  Fri Sep 21 03:56:44 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 21 Sep 2007 07:56:44 GMT
Subject: I could use some help making this Python code run faster using
	only Python code.
References: <1190325588.608625.259800@q3g2000prf.googlegroups.com>
	<1190328413.226577.206740@k79g2000hse.googlegroups.com>
	<1190330015.131971.265680@y42g2000hsy.googlegroups.com>
	<1190357165.381313.197910@19g2000hsx.googlegroups.com>
Message-ID: <Xns99B25B0334892duncanbooth@127.0.0.1>

George Sakkis <george.sakkis at gmail.com> wrote:

> It has to do with the input string length; try multiplying it by 10 or
> 100. Below is a more complete benchmark; for largish strings, the imap
> version is the fastest among those using the original algorithm. Of
> course using a lookup table as Diez showed is even faster. FWIW, here
> are some timings (Python 2.5, WinXP):
> 
> scramble:       1.818
> scramble_listcomp:      1.492
> scramble_gencomp:       1.535
> scramble_map:   1.377
> scramble_imap:  1.332
> scramble_dict:  0.817
> scramble_dict_map:      0.419
> scramble_dict_imap:     0.410

I added another one:

import string
scramble_translation = string.maketrans(''.join(chr(i) for i in xrange
(256)), ''.join(chr(i|0x80) for i in xrange(256)))
def scramble_translate(line):
    return string.translate(line, scramble_translation)

...
    funcs = [scramble, scramble_listcomp, scramble_gencomp,
             scramble_map, scramble_imap,
             scramble_dict, scramble_dict_map, scramble_dict_imap,
             scramble_translate
         ]


and I think I win:

scramble:       1.949
scramble_listcomp:      1.439
scramble_gencomp:       1.455
scramble_map:   1.470
scramble_imap:  1.546
scramble_dict:  0.914
scramble_dict_map:      0.415
scramble_dict_imap:     0.416
scramble_translate:     0.007




From paddy3118 at googlemail.com  Sat Sep 15 08:56:06 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Sat, 15 Sep 2007 12:56:06 -0000
Subject: regexp search on infinite string?
In-Reply-To: <1189802940.518794.129130@r29g2000hsg.googlegroups.com>
References: <1189802940.518794.129130@r29g2000hsg.googlegroups.com>
Message-ID: <1189860966.073168.33840@50g2000hsm.googlegroups.com>

On Sep 14, 9:49 pm, Paddy <paddy3... at googlemail.com> wrote:
> Lets say i have a generator running that generates successive
> characters of a 'string'>From what I know, if I want to do a regexp search for a pattern of
>
> characters then I would have to 'freeze' the generator  and pass the
> characters so far to re.search.
> It is expensive to create successive characters, but caching could be
> used for past characters. is it possible to wrap the generator in a
> class, possibly inheriting from string, that would allow the regexp
> searching of the string but without terminating the generator? In
> other words duck typing for the usual string object needed by
> re.search?
>
> - Paddy.

There seems to be no way of breaking into the re library accessing
characters from the string:

>>> class S(str):
... 	def __getitem__(self, *a):
... 		print "getitem:",a
... 		return str.__getitem__(self, *a)
... 	def __get__(self, *a):
... 		print "get:",a
... 		return str.__get__(self, *a)
...
>>> s = S('sdasd')
>>> m = re.search('as', s); m.span()
(2, 4)
>>> m = sre.search('as', s); m.span()
(2, 4)
>>> class A(array.array):
... 	def __getitem__(self, *a):
... 		print "getitem:",a
... 		return str.__getitem__(self, *a)
... 	def __get__(self, *a):
... 		print "get:",a
... 		return str.__get__(self, *a)
...
>>> s = A('c','sdasd')
>>> m = re.search('as', s); m.span()
(2, 4)
>>> m = sre.search('as', s); m.span()
(2, 4)
>>>

- Paddy.



From ptmcg at austin.rr.com  Wed Sep 12 04:21:08 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Wed, 12 Sep 2007 01:21:08 -0700
Subject: Help With PyParsing of output from win32pdhutil.ShowAllProcesses()
In-Reply-To: <1189534321.833098.114700@g4g2000hsf.googlegroups.com>
References: <1189534321.833098.114700@g4g2000hsf.googlegroups.com>
Message-ID: <1189585268.641157.192260@19g2000hsx.googlegroups.com>

On Sep 11, 1:12 pm, Steve <sreissc... at gmail.com> wrote:
> Hi All (especially Paul McGuire!)
>
> Could you lend a hand in the grammar and paring of the output from the
> function win32pdhutil.ShowAllProcesses()?
>
> This is the code that I have so far (it is very clumsy at the
> moment) :
>
<snip>
>
> Many thanks!
>
> Steve

Steve -

Well, your first issue is not a pyparsing one, but one of redirecting
stdout.  win32pdhutil.ShowAllProcesses does not *return* the output
you listed, it just prints it to stdout.  The value returned is None,
which is why you are having trouble parsing it (even after converting
None to a string).

For you to parse out this data, you will need to redirect stdout to a
string buffer, run ShowAllProcesses, and then put stdout back the way
it was.  Python's cStringIO module is perfect for this:


from cStringIO import StringIO
import sys
import win32pdhutil

save_stdout = sys.stdout
process_info = StringIO()
sys.stdout = process_info

win32pdhutil.ShowAllProcesses()
sys.stdout = save_stdout
sProcess_Info = process_info.getvalue()


*Now* you have all that data captured into a processable string.

As others have mentioned, this data is pretty predictably formatted,
so pyparsing may be more than you need.  How about plain old split?


for line in sProcess_Info.splitlines()[1:]:
    data = line.split()
    print data


Done!

Still have an urge to parse with pyparsing?  Here are some comments on
your grammar:

- Your definition of process_name was not sufficient on my system.  I
had some processes running whose names includes numeric digits and
other non-alphas.  I needed to modify process_name to:

process_name = pyparsing.Word(pyparsing.alphanums+"_.-")

- Similarly, some of my values returned by ShowAllProcesses had
negative values, so your definition of integer needs to comprehend an
optional leading '-' sign.  (This actually sounds like a bug in
win32pdhutil - I don't think any of these listed quantities should
report a negative value.)

- Whenever I have integers in a grammar, I usually convert them to
ints at parse time, using a parse action:

integer.setParseAction( lambda tokens : int(tokens[0]) )

- The tabular format of this data, and the fact that the initial entry
in each row appears to be a label of some sort invites the use of the
pyparsing Dict class.  I note that you are already trying to extract
keys from the parsed data, so it looks like you are already thinking
along these lines.  (Unfortunately, it is very likely you will get
duplicate keys, since process names do not have to be unique - this
will involve some loss of data in this example.)  The Dict class auto-
generates results names in the parsed results.  Dict turns out to be
awkward to use directly, so I added the dictOf method to simplify
things.  The concept of dictOf(keyExpr,valueExpr) is "parse a list of
dict entries, each of which is a key-value pair; while parsing, label
each entry with the parsed key."  In your example, this would be:

ProcessList = heading + pyparsing.dictOf(process_name,
pyparsing.OneOrMore(integer) )

The key is a leading process_name, and the value is the following list
of integers.  With this, you can print out the results using:


data = ProcessList.parseString(sProcess_Info)

print "data keys:", data.keys()
for k in sorted(data.keys()):
    print k, ":", data[k]


Getting:

BCMWLTRY : [684, 0, 0, 0, 54353920, 53010432]
CLI : [248, 0, 0, 0, 171941888, 153014272]
D4 : [2904, 0, 0, 0, 37527552, 36413440]
F-StopW : [2064, 0, 0, 0, 33669120, 30121984]
...
(again, note that the multiple entries for "CLI" have been reduced to
a single dict entry)

You could get similar results using something like:

data = dict((vals[0],vals[1:]) for vals in
map(str.split,sProcess_Info.splitlines()))

But then you would never have learned about dictOf!

Enjoy!
-- Paul



From gagsl-py2 at yahoo.com.ar  Thu Sep  6 16:01:11 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 06 Sep 2007 17:01:11 -0300
Subject: ImportError depending on the calling module
References: <1189079269.279716.254560@50g2000hsm.googlegroups.com>
	<1189093482.137051.73770@r29g2000hsg.googlegroups.com>
	<1189095236.413270.288090@50g2000hsm.googlegroups.com>
	<1189097056.295186.62020@r29g2000hsg.googlegroups.com>
	<1189100502.390665.216830@o80g2000hse.googlegroups.com>
Message-ID: <op.tx80j9wix6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 06 Sep 2007 14:41:42 -0300, Samuel <knipknap at gmail.com> escribi?:
> On Sep 6, 6:44 pm, Gabriel Genellina <gagsl-... at yahoo.com.ar> wrote:
>> On 6 sep, 13:13, Samuel <knipk... at gmail.com> wrote:
>>
>> That's fine, and a good requirement. Place start2.py inside the
>> container directory, and your package beneath it. Then you don't have
>> to modify sys.path to find the package - "import packagename" just
>> works. And it still works if the user installs the package (into site-
>> packages, by example).
>>
>>  start1.py
>>  start2.py
>>  packagename/
>>  |-- Obj.py
>>  |-- __init__.py
>>  |-- foo/
>>      |-- FooTest.py
>>      `-- __init__.py
>>
>> Packages are... well, packages, boxes. Don't try to import a module
>> inside a package as it were a standalone module
>
> But the start2.py script *is* part of the library. It should be in the
> package.

If it imports the package, it cannot be part of the package itself.

> However, I just found that Python 2.5 introduces relative imports.
> This sounds like an attempt to remedy the situation.

For relative imports to work, the importing module must know that it is  
part of a package. That is not the case if you run a script located inside  
the package.

-- 
Gabriel Genellina



From samcohenmoney at gmail.com  Sun Sep 23 12:53:21 2007
From: samcohenmoney at gmail.com (Sam)
Date: Sun, 23 Sep 2007 12:53:21 -0400
Subject: Turn 12 dollars into thousands
Message-ID: <1190566150_5263@sp12lax.superfeed.net>

Turn 12 dollars into thousands

  IT'S SIMPLE AND IT'S LEGAL!!!!!!!
Who doesn?t want to make tons of money ridiculously easy? Read this
letter?follow the instructions..and like me..you?ll never have to worry 
about
money again.
I was browsing through news groups just like you are right now and
Came across a article similar to this saying that you could make thousands
Of dollars within weeks with only an initial investment of $12.00!! So I
Thought yeah right. This must be a scam, but like most of us, I was
Curious, so I kept reading. Anyway it said that you send two dollars to
Each of the six names and addresses stated in the article. You then place
Your own name and address on the bottom of the list at number six and post
The article to at least 200 newsgroups. (there are thousands) No catch
That was it. So after talking to a few people and thinking it over I
Decided to give it a try. What have I got to lose except 6 stamps and
$12.00 right? Then I invested the measly twelve dollars. WELL GUESS
WHAT!!!

Within 7 days, I started getting money in the mail!!! I was shocked. I
Thought it was going to stop but it just kept coming. In my first week I
Made $50.00. By the end of the second week I had $1,800.00. In the end of
The third week I made $10,000.00!!! It's still growing right now. This is
Now my fourth week and I have made a total of just over $76,000.00! and
It's still coming in rapidly. This is certainly worth $12.00 and 6 stamps.
I have spent more than that on the lottery!!
Let me tell you how this works and most importantly why it works. Also
Make sure that you print a copy of this article NOW so you can get the
Information off of it as you need it. I promise you that if you follow the
Directions exactly, that you will start making more money than you
Possibly thought just by doing something so easy!! SUGGESTION: READ THIS
ENTIRE MESSAGE CAREFULLY (Print it out or down load it) Follow the simple
Directions and watch the money come in! It's easy. It's legal. And your
Investment is only $12.00 (plus postage) IMPORTANT: This is not a rip off;
It is not indecent; it is not illegal; and it is virtually no risk - it
Really works!!!!! If all of the following instructions are adhered to, you
Will receive extraordinary dividends. PLEASE NOTE: please follow these
Directions exactly and $100,000 or more can be yours in 20 to 60 days.
This program remains successful because of the honesty and integrity of
The participants. Please continue its success by carefully adhering to the
Instructions. You will now become a part of the mail order business. In
This business your product is not solid and tangible, it's a service. You
Are in the business of developing a mailing list. Many large corporations
Are happy to pay big bucks for quality list. However, the money made from
The mailing list is secondary to the income, which is made from people
Like you and me asking to be included to that list. Here are the four
Steps to success:
STEP 1: Get 6 separate pieces of paper write the following on each piece
Of paper "PLEASE PUT ME ON YOUR MAILING LIST."
Now get 12 us 1dollar bills and place TWO bills inside EACH of the six
Pieces of paper so the bills will not be seen through the envelope to
Prevent thievery. Next place one paper in each of the 6 envelopes and seal
Them.
MAKE SURE THERE ARE ENOUGH STAMPS ON YOUR ENVELOPES. You should now
Have 6
Sealed envelopes, each with a piece of paper stating the above phrase your
Name and address and two $1.00 bill. What you are doing is creating a
Service. THIS IS ABSOLUTELY LEGAL! You are requesting a legitimate service
And you are paying for it! Like most of us, I was a little skeptical and a
Little worried about the legal aspects of it all. So I checked it out with
The U.S. Post Office (1-800-725-2161) and they confirmed that it is indeed
Legal!!!!! Mail the six envelopes to the following addresses:


___________________________________________________________________
 >>> >>>>>>#1) Mari Rodriguez
 >>> >>>>>> PO Box 15203
 >>> >>>>>> Tucson AZ 85708
___________________________________________________________________
 >>> >>>>>>#2) Jia Ming
 >>> >>>>>> 2101 Cumberland Ave
 >>> >>>>> Apt 2105 West Lafayette IN 47906
___________________________________________________________________
 >>> >>>>>>#3) Kimberly Williams
 >>> >>>>>> 11865 S.W. 91st. Ave. #49
 >>> >>>>>> Tigard OR. 97223
___________________________________________________________________
 >>> >>>>>> #4) Rahim Karim
 >>> >>>>>>105 Hillpine Rd. Apt M-2
 >>> >>>>>>Columbia SC 29212

 >>> >>>>>> #5) Joy Simongkhoun
 >>> >>>>>> 3015 Wilson Ave.
 >>> >>>>>> Bellingham, WA 98225

 >>> >>>>>>#6) Sam Cohen
 >>> >>>>>>315 E 88 st. apt 2E
 >>> >>>>>>New York, NY 10128

 >>> >>>>>STEP 2: Now take the #1 name off the list that you see above,
Move the other names up (6 becomes 5, 5 becomes 4, etc?) and add YOUR name
As number 6 on the list.
STEP 3: Change anything you need to but try to keep this article as
Original as possible. Now post your amended article to at least 200 news
Groups. ( I think there are 24,000 groups) All you need is 200, but
Remember, the more you post , the more money you make!**
EVERYBODY AROUND THE WORLD CAN DO THIS BUT REMEMBER TO PUT
ENOUGH STAMPS
ON YOUR ENVELOPES!!!!**
This is perfectly legal! If you have any doubts, refer to title 18 sec.
1302 & 1341 of the postal lottery laws. Keep a copy of these steps for
Your self and whenever you need money, you can use it again and again.
PLEASE REMEMBER that this program remains successful because of the
Honesty and integrity of the participants and by carefully adhering to the
Directions. Look at it this way, if you are of integrity, the program will
Continue and the money that so many others have received will come your
Way.
NOTE: You may want to retain every name and address sent to you, either on
A computer or a hard copy and keep the notes people sent you. This
Verifies that you are truly providing a service. (Remember to wrap the two
$1 bills in the note to prevent mail theft.) So as each post is downloaded
And the directions carefully followed, six members will be reimbursed for
Their participation as a list developer with two dollar each. Your name
Will move up the list geometrically so that when your name reaches the #1
Spot you will be receiving thousands of dollars in CASH!!!!! What an
Opportunity for only $12.00($2 for each of the six people listed above)
Send it now, add your own name to the list and you're in business!

---DIRECTIONS---- FOR HOW TO POST TO NEWS GROUPS-----
STEP 1: You do not need to retype this entire letter to do your own
Posting. Simply put your cursor at the beginning of this letter and drag
Your cursor to the bottom of this document, and select "copy" from the
Edit menu. This will copy the entire letter into the computer's memory.
STEP 2: open a blank notepad file and place your cursor at the top of the
Blank page. From the edit menu select "paste." This will paste the copy of
The letter into notepad so you can add your name to the list.
STEP 3: Save your new notepad file as a .txt file. If you want to do your
Postings in different settings , you'll always have this file to go back
To.
STEP 4: Use Netscape and Internet Explorer and try searching for various
News groups (on-line forums message boards, chat sites, discussions.)
STEP 5: Visit these message boards and post this article as a new message
By highlighting the text of this letter and selecting "paste" from the
Edit menu. Fill in the subject, this will be the header that everyone sees
As they scroll through the list of postings in a particular group, click
The post message button. You're done with the first one!
Congratulations?THAT'S IT! All you have to do is jump to different news
Groups and post away, after you get the hang of it, it will take 30
Seconds for each newsgroup! **REMEMBER, THE MORE NEWSGROUPS YOU POST IN
(MESSAGE BOARDS ETC) THE MORE MONEY YOU WILL MAKE!! BUT YOU HAVE
TO POST A
MINIMUM OF 200.
That's it! You will begin receiving money from around the world within
Days! You may eventually want to rent a P.O. Box due to the large amount
Of mail you will receive. If you wish to stay anonymous, you can invent a
Name to use as long as the postman will deliver it. **JUST MAKE SURE THE
ADDRESS IS CORRECT** Let me break it down, say I receive only 5 replies,
So then I made $10 with my name at #6 on the letter. Now each of the 5
Persons who just sent me $2 made the MINIMUM 200 postings, each with my
Name at #5 and only 5 people respond to the original 5 people. That is
Another $50 for me. Now those 25 people make the MINIMUM 200 post with my
Name at number 4 and only 5 replies each, I will make $250. Now, those 125
People post the MINIMUM 200 postings with my name at #3 and only get 5
Replies each, I will make an additional $1,252! Ok, now here's the fun
Part each of those 625 people post a MINIMUM 200 with my name at #2 ant
They only get 5 replies that just made me $6,250!!! Those 3125 people send
A MINIMUM 200 postings and they only get 5 replies each with my name at
#1, I will receive $31,250!!! With an original investment of $12!!!!
AMAZING!!!! . When your name is no longer on the list, you just take the
Latest postings in the news groups and send out another $12 to names on
The list putting yourself at #6 and start posting again. Thousands of
People are joining the internet each day and they are reading articles
Like these just like you are right now. So this can never get played outb
Just keep it going and you can make tons of money too!!!! Please try it
Now and make big bucks in a few short weeks!!!!!!


From steve at REMOVE-THIS-cybersource.com.au  Sun Sep 16 09:34:07 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sun, 16 Sep 2007 13:34:07 -0000
Subject: generate list of partially accumulated values
References: <1189936564.932553.148800@50g2000hsm.googlegroups.com>
	<1189936979.276166.103080@w3g2000hsg.googlegroups.com>
	<1189937183.100462.175070@o80g2000hse.googlegroups.com>
	<1189938119.469599.171960@w3g2000hsg.googlegroups.com>
	<1189941510.325769.98490@o80g2000hse.googlegroups.com>
Message-ID: <13eqc6fq915li08@corp.supernews.com>

On Sun, 16 Sep 2007 04:18:30 -0700, marek.rocki wrote:

> Those methods of computing partial sums seem to be O(n^2) or worse.
> What's wrong with an ordinary loop?

Haven't you heard? There's a global shortage of newlines, and programmers 
have been asked to do their bit to conserve them.


-- 
Steven.


From kyosohma at gmail.com  Wed Sep 12 11:23:35 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Wed, 12 Sep 2007 15:23:35 -0000
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
Message-ID: <1189610615.455177.80950@57g2000hsv.googlegroups.com>


Charles Fox wrote:
> I've just started playing around with Python, as a possible
> replacement for a mix of C++, Matlab and Lisp.  The language looks
> lovely and clean with one huge exception:  I do a lot of numerical
> modeling, so I deal with objects (like neurons) described
> mathematically in papers, by equations like
>     a_dot = -k(a-u)
> In other languages, this translates nicely into code, but as far as I
> can tell, Python needs the ugly:
>     self.a_dot = -self.k(self.a-self.u)
> For large equations this is going to make my code seriously unreadable
> to the point of needing to switch back to Matlab -- and it seems to go
> against everything else about python's simplicity and elegance.  Am I
> missing something?  Is there something like a 'with' command that lets
> me set the scope, like
>
>     with self:
>       .a_dot = -.k(.a-.u)
>
> It's premature to make language suggestions as I am new to the
> language, but I would have though that making a 'with self' explicit
> in all methods would have been neat, so I could just write
>       .a_dot = -.k(.a-.u)
> which would still avoid confusion with local function variables, since
> '.a' is different from 'a'.
>
> Please help if I am missing something -- this looks like a great
> language but I am going to mad trying to read numerical code full of
> 'self.'s breaking up the equations.

I don't know if it'll help or not, but you might try using matplotlib,
numpy or pymat. One of those may make it easier to do your
calculations.

Mike



From nichols.alan at gmail.com  Mon Sep 24 12:25:27 2007
From: nichols.alan at gmail.com (nichols.alan at gmail.com)
Date: Mon, 24 Sep 2007 16:25:27 -0000
Subject: type compatibility warnings -- building python on windows 64-bit x64
Message-ID: <1190651127.527708.203300@57g2000hsv.googlegroups.com>

I am attempting to build the SVN release of python on Visual Studio 8.

I get the warning messages such as the following:


..\..\Modules\cPickle.c(527) : warning C4244: '=' : conversion from
'Py_ssize_t' to 'int', possible loss of data
..\..\Modules\binascii.c(285) : warning C4244: '=' : conversion from
'Py_ssize_t' to 'unsigned char', possible loss of data
..\..\PC\_winreg.c(736) : warning C4267: '=' : conversion from
'size_t' to 'DWORD', possible loss of data
c:\python25_svn_64\objects\stringlib/fastsearch.h(57) : warning C4244:
'=' : conversion from 'Py_ssize_t' to 'long', possible loss of data

It's my understanding that the underlying type of the Py_ssize_t is 64-
bit while ints and longs are 32-bit in VS 2005 -- hence the basis of
the warnings.

Can you tell me if this is an issue of concern, or can I ignore the
warnings?

Thank you,

Alan Nichols



From mail at timgolden.me.uk  Thu Sep  6 07:16:09 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 06 Sep 2007 12:16:09 +0100
Subject: Nudge needed for rst to html
Message-ID: <46DFE179.40003@timgolden.me.uk>

I'm a bit embarrassed about this, but I've scoured
the docutils docs and I can't seem to work out how
to take a block of ReStructuredText and output a
raw HTML fragment, ideally without a surrounding
document or embedded/linked css etc. (I'm trying
to allow rst in our helpdesk system which can render
nicely on the web version and be readable in text).

I thought that:

<code>
import docutils.core

html = docutils.core.publish_string ("Hello, world!", writer_name="html")

</code>

would do the trick, but that produces an entire document with
an embedded style block. I imagine I need to push something into
the settings_spec / config_section parameter there, but despite
a certain amount of walking up the code tree I can't confirm whether
that's true, or what to put if it is.

I'm very happy to be pointed to tfm on this one, or a code
sample would be gratefully received. Maybe it's not possible
without writing my own HTML writer backend, in which case
a pointer there would be useful.

Thanks
TJG


From gagsl-py2 at yahoo.com.ar  Mon Sep 24 22:29:22 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 24 Sep 2007 23:29:22 -0300
Subject: PIL GIF transparency
References: <1190681626.499676.14620@n39g2000hsh.googlegroups.com>
Message-ID: <op.ty6ui8dax6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 24 Sep 2007 21:53:46 -0300, David <davigoli at gmail.com> escribi?:

> I have a large number of smallish icons (GIFs with transparency) that
> I'd like to tile into a grid in one large GIF image.  The background
> color of the image should be GIF-transparent.  Currently, I can set it
> to be white or black or any other color I want, just not transparent.

Read this post from 2006:
<http://groups.google.com/group/comp.lang.python/msg/9c33aea70b72d78b>

-- 
Gabriel Genellina



From zentraders at gmail.com  Tue Sep  4 11:33:32 2007
From: zentraders at gmail.com (Zentrader)
Date: Tue, 04 Sep 2007 08:33:32 -0700
Subject: GC performance with lists
In-Reply-To: <1188914819.723858.25000@d55g2000hsg.googlegroups.com>
References: <1188914819.723858.25000@d55g2000hsg.googlegroups.com>
Message-ID: <1188920012.694607.321850@k79g2000hse.googlegroups.com>

On Sep 4, 7:06 am, jo... at mit.edu wrote:
One thing to do is to calc i+1 etc before the j loop instead of on
every iteration.  That is, calculate 600,000 times instead of
6*57*100,000=34,200,00,  And in today's world, it probably won't make
a lot of difference, This is not related to gc but is a good
programming practice IMHO.  Personal preference is to use a varialble
to store the result If I have to calculate something more than twice.




From rcdailey at gmail.com  Tue Sep 25 18:39:33 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Tue, 25 Sep 2007 17:39:33 -0500
Subject: Missing documentation for ElementTree?
Message-ID: <496954360709251539y2511a1cbnd25c6d3a0d368d2a@mail.gmail.com>

Hi,

for the _ElementInterface class, there is no documentation for most of the
members of this class such as .tail and .text. There's a brief description
of these things on the front page of the ElementTree docs but nothing
helpful. I have no idea what Tail is vs Text and I wanted to figure this out
myself, however I don't think I can now. Anyone know if I'm just missing
something in the documentation or if it really isn't in there?
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From alex at spam.me.not  Thu Sep 20 14:44:47 2007
From: alex at spam.me.not (alex)
Date: Thu, 20 Sep 2007 14:44:47 -0400
Subject: An Editor that Skips to the End of a Def
In-Reply-To: <oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
Message-ID: <n7zIi.1482$uf2.1437@llnews>

> Paul Rudin wrote:
>> "W. Watson" <wolf_tracks at invalid.com> writes:
>>
>>> Is there an editor that allows one to position to put the cursor and
>>> then by pushing some button goes to the end of the def?
>>
>> C-M-e in emacs/python-mode.
> 
W. Watson wrote:
 > Thanks, but no thanks. The learning curve is way too steep.

There are two good editors for writing code -- vim and emacs.
If you write more than a few lines of code a year you should learn
one of them. Time spent doing it will pay for itself *very* quickly.

-- 
Alex


From bdesth.quelquechose at free.quelquepart.fr  Thu Sep 20 03:57:11 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 20 Sep 2007 09:57:11 +0200
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
In-Reply-To: <87tzqc9jda.fsf@benfinney.id.au>
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
	<1188803759.498517.198900@g4g2000hsf.googlegroups.com>
	<87tzqc9jda.fsf@benfinney.id.au>
Message-ID: <46f2bcca$0$20143$426a74cc@news.free.fr>

Ben Finney a ?crit :
(snip)
> One common response to that is "Processes are expensive on Win32". My
> response to that is that if you're programming on Win32 and expecting
> the application to scale well, you already have problems that must
> first be addressed that are far more fundamental than the GIL.

Lol ! +1 QOTW !



From bbxx789_05ss at yahoo.com  Mon Sep 17 11:50:52 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Mon, 17 Sep 2007 08:50:52 -0700
Subject: curses: x, y positioning
In-Reply-To: <1190035292.415363.22320@50g2000hsm.googlegroups.com>
References: <1189891633.622313.81850@r29g2000hsg.googlegroups.com>
	<m9qre35si8tujadfs6d0ukk4f9rhdgvuao@4ax.com>
	<1190035292.415363.22320@50g2000hsm.googlegroups.com>
Message-ID: <1190044252.770768.241100@w3g2000hsg.googlegroups.com>

On Sep 17, 7:21 am, 7stud <bbxx789_0... at yahoo.com> wrote:
> Hi,
>
> Thanks for the response.
>
> On Sep 16, 8:41 pm, Tim Roberts <t... at probo.com> wrote:
>
> > Don't you want mvaddstr?
>
> import curses
>
> def my_program(screen):
>     while True:
>         ch = screen.getch()
>
>         if ch == ord("q"):
>             break
>         if ch <= 255:
>             screen.mvaddstr(30, 10, "*%s*" % chr(ch))
>             screen.refresh()
>
> curses.wrapper(my_program)
>
> Traceback (most recent call last):
>   File "2pythontest.py", line 13, in ?
>     curses.wrapper(my_program)
>   File "/Library/Frameworks/Python.framework/Versions/2.4//lib/
> python2.4/curses/wrapper.py", line 44, in wrapper
>     return func(stdscr, *args, **kwds)
>   File "2pythontest.py", line 10, in my_program
>     screen.mvaddstr(5, 5, "*%s*" % chr(ch))
> AttributeError: mvaddstr
>
>
>
> >(And remember that y comes first.)
> > --
> >>I can't seem to get any y, x coordinates to work with curses.
>
> However, while changing things around, I discovered what is causing
> the error:  the coordinate 30, 10 is off my screen.  When I change the
> y, x coordinates to 5, 10, then the program executes as it should.
>
> However, now I am having a problem trying to set the color of the text
> that is output:
>
> import curses
>
> def my_program(screen):
>     while True:
>         ch = screen.getch()
>
>         if ch == ord("q"):
>             break
>         if ch <= 255:
>             output = "*%s*" % chr(ch)
>
>             screen.addstr(5, 5, output, curses.COLOR_RED)
>             screen.refresh()
>
> curses.wrapper(my_program)
>
> A strange thing is happening.  The integer value of the constant
> curses.COLOR_RED is 1, and when I type in a character, 1 is getting
> added to the character's ascii code.  For instance, if I type in an
> 'h', then an 'i' displays on the screen--and in white, not red.
>
> I did some testing and has_colors() returns True, but I still can't
> get the curses output to show up in red.  The tutorial:
>
> Curses Programming with Python
> A.M. Kuchling, Eric S. Raymond
>
> says:
>
> To use color, you must call the start_color() function soon after
> calling initscr(), to initialize the default color set (the
> curses.wrapper.wrapper() function does this automatically). Once
> that's done, the has_colors() function returns TRUE if the terminal in
> use can actually display color.
>
> Another thing that is strange: that paragraph uses the syntax
> curses.wrapper.wrapper().  And the docs say this:
>
> --------
> 6.17 curses.wrapper -- Terminal handler for curses programs
> New in version 1.6.
>
> This module supplies one function, wrapper()...
> --------
>
> which implies that I should be using the syntax
> curses.wrapper.wrapper() in my code.  But I get an error when I try
> it:
>
> Traceback (most recent call last):
>   File "2pythontest.py", line 16, in ?
>     curses.wrapper.wrapper(my_program)
> AttributeError: 'function' object has no attribute 'wrapper'
>
> I get the same error if add the import statement:
>
> import curses.wrapper
>
> I'm using an intel mac if that makes any difference.

Ok.  This works:

import curses
import curses.wrapper

def my_program(screen):
    curses.init_pair(1, curses.COLOR_RED, curses.COLOR_BLACK)

    while True:
        ch = screen.getch()

        if ch == ord("q"):
            break

	if ch <= 255:
            output = "*%s*" % chr(ch)

            screen.addstr(5, 5, output, curses.color_pair(1))
            screen.refresh()

curses.wrapper(my_program)



From paddy3118 at googlemail.com  Thu Sep 20 02:28:35 2007
From: paddy3118 at googlemail.com (Paddy)
Date: Thu, 20 Sep 2007 06:28:35 -0000
Subject: Sets in Python
In-Reply-To: <1190260923.243865.312190@z24g2000prh.googlegroups.com>
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
	<CeB*qHeVr@news.chiark.greenend.org.uk>
	<1190235483.412972.81280@v23g2000prn.googlegroups.com>
	<13f3m15igkstq2e@corp.supernews.com>
	<1190260923.243865.312190@z24g2000prh.googlegroups.com>
Message-ID: <1190269715.454170.244130@22g2000hsm.googlegroups.com>

On Sep 20, 5:02 am, Karthik Gurusamy <kar1... at gmail.com> wrote:
> In the new model, at the time of addition, you need to remember the
> key at that time. If it's a list, you make a copy of the items.
In other words you ask the dict to freeze any mutable keys given to
it.
Try an implementation and you will find it is impractical. Checking
for mutability then doing deep copies of keys and  would consume time
in something that greatly affects the speed of Python as a whole.
Pythons designers give *you* the option of doing this and leave the
underlying dict speedy. I can live with that.

- Paddy.




From zentraders at gmail.com  Tue Sep  4 15:11:43 2007
From: zentraders at gmail.com (Zentrader)
Date: Tue, 04 Sep 2007 12:11:43 -0700
Subject: GC performance with lists
In-Reply-To: <mailman.30.1188923271.2658.python-list@python.org>
References: <1188914819.723858.25000@d55g2000hsg.googlegroups.com>
	<mailman.30.1188923271.2658.python-list@python.org>
Message-ID: <1188933103.706134.232350@g4g2000hsf.googlegroups.com>

On Sep 4, 9:27 am, "John Krukoff" <jkruk... at ltgc.com> wrote:
> > -----Original Message-----
> > From: python-list-bounces+jkrukoff=ltgc.... at python.org [mailto:python-
> > list-bounces+jkrukoff=ltgc.... at python.org] On Behalf Of jo... at mit.edu
> > Sent: Tuesday, September 04, 2007 8:07 AM
> > To: python-l... at python.org
> > Subject: GC performance with lists
>
> > While working on some python wrapping, I've run into some problems
> > where the GC seems to take an unreasonable amount of time to run. The
> > code below is a demonstration:
>
> > import gc
> > #gc.disable()
>
> > data = []
> > for i in xrange(100000):
>
> >     shortdata = []
> >     for j in range(57):
> >         mytuple = (j, i+1, i+2, i+3, i+4, i+5, i+6)
> >         shortdata.append(mytuple)
> >     data.extend(shortdata)
>
> > print len(data)

Isn't this the type of program that psyco is supposed to do well
with?  Perhaps someone else knows a little bit more.



From aleax at mac.com  Fri Sep 14 11:22:52 2007
From: aleax at mac.com (Alex Martelli)
Date: Fri, 14 Sep 2007 08:22:52 -0700
Subject: "once" assigment in Python
References: <1189750616.597409.85380@w3g2000hsg.googlegroups.com>
	<46ea4381$0$15390$4c368faf@roadrunner.com>
	<1189773491.560250.205580@y42g2000hsy.googlegroups.com>
Message-ID: <1i4f8ef.45zmq21lmeevkN%aleax@mac.com>

Lorenzo Di Gregorio <lorenzo.digregorio at gmail.com> wrote:

> When employing Python it's pretty straightforward to translate the
> instance to an object.
> 
> instance = Component(input=wire1,output=wire2)
> 
> Then you don't use "instance" *almost* anymore: it's an object which
> gets registered with the simulator kernel and gets called by reference
> and event-driven only by the simulator kernel.  We might reuse the
> name for calling some administrative methods related to the instance
> (e.g. for reporting) but that's a pretty safe thing to do.  Of course
> all this can be done during initialization, but there are some good
> reasons (see Verilog vs VHDL) why it's handy do be able to do it
> *anywhere*.  The annoying problem was that every time the program flow
> goes over the assignment, the object gets recreated.

If you originally set, e.g.,

  instance = None

then using in your later code:

  instance = instance or Component(...)

will stop the multiple creations.  Other possibilities include using a
compound name (say an.instance where 'an' is an instance of a suitable
container class) and overriding the __new__ method of class Component so
that it will not return multiple distinct objects with identical
attributes.  "Has this *plain* name ever been previously assigned to
anything at all" is simply not a particularly good condition to test for
(you COULD probably write a decorator that ensures that all
uninitialized local variables of a function are instead initialized to
None, but I'd DEFINITELY advise against such "black magic").


Alex


From bj_666 at gmx.net  Sat Sep 15 20:05:58 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 16 Sep 2007 00:05:58 GMT
Subject: Needless copying in iterations?
References: <fchk59$mm3$1@daisy.noc.ucla.edu>
Message-ID: <5l3ab6F5v20uU3@mid.uni-berlin.de>

On Sat, 15 Sep 2007 14:58:15 -0700, James Stroud wrote:

> I was staring at a segment of code that looked like this today:
> 
>     for something in stuff[x:y]:
>       whatever(something)
> 
> and was wondering if the compiler really made a copy of the slice from 
> stuff as the code seems to suggest, or does it find some way to produce 
> an iterator without the need to make a copy (if stuff is a built-in 
> sequence type)?

The compiler can't "optimize" this as it would change the semantics. 
There's no way for the compiler to tell if this copy really is "needless".
`whatever()` may change `stuff[i]` where `i` is in `x:y` and this may lead
to different results wether it iterates over a copy or the original.

Ciao,
	Marc 'BlackJack' Rintsch


From zzbbaadd at aol.com  Thu Sep  6 20:48:29 2007
From: zzbbaadd at aol.com (TheFlyingDutchman)
Date: Thu, 06 Sep 2007 17:48:29 -0700
Subject: why should I learn python
In-Reply-To: <1189119676.239459.325280@w3g2000hsg.googlegroups.com>
References: <1189114328.695921.230270@d55g2000hsg.googlegroups.com>
	<mailman.189.1189118213.2658.python-list@python.org>
	<87zlzzs9by.fsf@wilson.homeunix.com>
	<1189119676.239459.325280@w3g2000hsg.googlegroups.com>
Message-ID: <1189126109.189507.150580@w3g2000hsg.googlegroups.com>

On Sep 6, 4:01 pm, windandwaves <nfranc... at gmail.com> wrote:
> On Sep 7, 10:44 am, Torsten Bronger <bron... at physik.rwth-aachen.de>
> wrote:
>
>
>
> > Hall?chen!
>
> > Tom Brown writes:
> > > [...] Python has been by far the easiest to develop in.  Some
> > > people might say it is not "real programming" because it is so
> > > easy.
>
> > I can't believe this.  Have you really heard such a statement?
>
> > Tsch?,
> > Torsten.
>
> > --
> > Torsten Bronger, aquisgrana, europa vetus
> >                                       Jabber ID: bron... at jabber.org
> >                       (Seehttp://ime.webhop.orgforICQ, MSN, etc.)
>
> but because I am really not much of a
> programmer, it is often too detailed for me).  I have limited time,
> but it does sound like something to learn, just for fun and for
> practical use.  How would you use it in a web development
> environment?

Python can be used as an apache module called mod_python and also as a
CGI language.

> I mean, in real practical terms.  Could it assist with
> php?

Since you said you are really not much of a programmer I wouldn't
consider learning two languages. I don't believe there is any tie in
between Python and PHP. It could assist in a Web application only in
the sense that you wrote part in PHP and part in Python. For Web
development PHP is, I believe, more prevalent and would be more of a
benefit on a resume. PHP use outside of a Web app is not very common
but is supposed to be possible so if your usage is primarily Web I
would go with PHP.






From Mihai.Grecu at gmail.com  Mon Sep 24 06:13:42 2007
From: Mihai.Grecu at gmail.com (mihai)
Date: Mon, 24 Sep 2007 10:13:42 -0000
Subject: python variable assignement
Message-ID: <1190628822.472242.272900@19g2000hsx.googlegroups.com>


I work at an application witch has embeded python.

We have an python type X.

# a != b

a = b # at this point both variables have the same value

b = select_other()

# steel the same values but both have the new value of b

What might be the cause for this behavior? The type of a and b
variable is the same,
and is defined using PyTypeObject structure.

I hope I was explicit.

Thank you in advance,
Mihai.



From heikki at osafoundation.org  Sun Sep 30 14:32:20 2007
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Sun, 30 Sep 2007 11:32:20 -0700
Subject: Python  and SSL
In-Reply-To: <NikLi.3276$6p6.368@newssvr25.news.prodigy.net>
References: <1190959345.041723.108130@k79g2000hse.googlegroups.com>
	<6cydncA2Jpv082DbnZ2dnUVZ_q6dnZ2d@comcast.com>
	<NikLi.3276$6p6.368@newssvr25.news.prodigy.net>
Message-ID: <NNidnTtfS-UpdmLbnZ2dnUVZ_oGdnZ2d@comcast.com>

John Nagle wrote:
>     Any progress on getting M2Crypto 0.18 to build successfully
> on Fedora Core?

I have had no luck getting a Fedora Core environment running. Ubuntu is
my main OS, but I do have VMWare installed. I tried to install FC7 from
the live CD into VMWare, but the installer dies. I also tried to
download a ready-made FC8t1 VMWare appliance, but it fails to boot. So
currently I am dead in the water.

-- 
  Heikki Toivonen


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Sep 18 08:45:26 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 18 Sep 2007 14:45:26 +0200
Subject: super, apply, or __init__ when subclassing?
In-Reply-To: <1190100791.740269.62880@k79g2000hse.googlegroups.com>
References: <1190100791.740269.62880@k79g2000hse.googlegroups.com>
Message-ID: <46efc85f$0$17612$426a74cc@news.free.fr>

exhuma.twn a ?crit :
> This is something that keeps confusing me. If you read examples of
> code on the web, you keep on seeing these three calls (super, apply
> and __init__) to reference the super-class. This looks to me as it is
> somehow personal preference. But this would conflict with the "There
> one way to do it" mind-set.

apply is deprecated. Chances are that code using it is somewhat old. 
super came with the new object model in Python 2.2.1 (IIRC), and is only 
useful for some corner cases involving multiple inheritence . Directly 
calling the superclass's method (__init__ or whatever) is the canonical 
way in the most common cases.

And BTW, the sentence is "there *should* be one - and *preferably* only 
one - *obvious* way to do it" (emphasis is mine). In this case, there's 
_at least_ one way do to do it, and only one (direct call) is really 
obvious IMHO !-)

> So, knowing that in python there is one thing to do something, these
> three different calls must *do* domething different.

Indeed. But mostly because you managed to get 2 examples wrong !-)

> But what exactly
> *is* the difference?
> 
> ------------ Exampel 1: -----------------------------
> 
> class B(A):
>    def __init__(self, *args):
>       A.__init__(self, args)

You want:

class B(A):
    def __init__(self, *args):
       A.__init__(self, *args)


> ------------ Exampel 2: -----------------------------
> 
> class B(A):
>    def __init__(self, *args):
>       apply( A.__init__, (self,) + args)

is the same as the previous, using the deprecated apply function.

> ------------ Exampel 3: -----------------------------
> 
> class B(A):
>    def __init__(self, *args):
>       super(A,self).__init__(*args)
> 

You want:

class B(A):
    def __init__(self, *args):
       super(B,self).__init__(*args)



From fakeaddress at nowhere.org  Wed Sep 19 23:58:05 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Wed, 19 Sep 2007 20:58:05 -0700
Subject: Sets in Python
In-Reply-To: <1190235483.412972.81280@v23g2000prn.googlegroups.com>
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
	<CeB*qHeVr@news.chiark.greenend.org.uk>
	<1190235483.412972.81280@v23g2000prn.googlegroups.com>
Message-ID: <_cmIi.3452$ZA5.919@nlpi068.nbdc.sbc.com>

Karthik Gurusamy wrote:
> While it's easy to explain the behavior, I think the decision to dis-
> allow mutable items as keys is a bit arbitrary. 

Furthermore, it's not really true.

     class Blurf (object):
         def __init__(self, intval):
             self.seti(intval)
         def seti(self, intval):
             self.i = intval


Blurf sure looks mutable, yet Python will happily use Blurfs as
dict keys. The trick is that the dict key is the Blurf's identity,
not its state. We could switch to using state as the key by
implementing methods __hash__ and either __cmp__ or __eq__.


[...]
> why not allow similar behavior with lists/other sequence/even other
> collections. As long as two objects compare equal the hash-result must
> be the same. 

That's a good rule to follow in programming one's own classes.
Keep __hash__, __cmp__ and __eq__ consistent.


> I guess this takes us to defining the equality operation
> for lists-- which I think has a very obvious definition (ie same
> length and the ith element of each list compare equal).

Already done. The "==" operator compares lists by their contents;
the "is" operator, by identity.

> So if the list changes, it will result in a different hash and we will
> get a hash-miss. I doubt this is in anyway less intuitive than dis-
> allowing mutable items as keys.

If it's any consolation, you can build your own:

     class HashableList (list):
         def __hash__(self):
             return tuple(self).__hash__()

You'd probably also want to implement slicing.


Bad news: Python 3000 has no immutable type for byte-strings.
The new bytes type cannot serve for dict keys or set members.
Many things one would want to hash are unhashable -- for
example, the results of the hash functions in hashlib.


-- 
--Bryan


From http  Sat Sep 22 14:52:15 2007
From: http (Paul Rubin)
Date: 22 Sep 2007 11:52:15 -0700
Subject: Would Anonymous Functions Help in Learning Programming/Python?
References: <1190410638.211343.241690@y42g2000hsy.googlegroups.com>
	<1190411282.060772.289270@y42g2000hsy.googlegroups.com>
	<XIbJi.36$ua4.28@newssvr22.news.prodigy.net>
Message-ID: <7xy7eysfc0.fsf@ruckus.brouhaha.com>

Bryan Olson <fakeaddress at nowhere.org> writes:
> chris.monsanto at gmail.com wrote:
> > There are already anonymous functions in Python.
> > lambda x, y, z: x + y + z
> > is the same as:
> > def _(x, y, z): return x + y + z
> 
> They are the same only in special cases:
>      The special identifier "_" is used in the interactive
>      interpreter to store the result of the last evaluation...

I'm not sure what Chris was really getting at, since among other
things lambda:... is an expression while def... is a statement.
But Python certainly has anonymous functions without lambda:

   def compose(f,g):
     def h(*a, **k):
       return f(g(*a, **k))
     return h

   x = compose(math.sin, math.cos)(1.0)

computes sin(cos(1.0)) where a function equivalent to 
  lambda x: sin(cos(x))
is constructed and used without being bound to a symbol.


From mensanator at aol.com  Mon Sep 17 01:30:33 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: Sun, 16 Sep 2007 22:30:33 -0700
Subject: Try this
In-Reply-To: <mailman.633.1189994413.2658.python-list@python.org>
References: <1189932394.353862.201750@g4g2000hsf.googlegroups.com>
	<13eqsdfsfvsa16f@corp.supernews.com>
	<1189969529.652871.19280@50g2000hsm.googlegroups.com>
	<mailman.621.1189970593.2658.python-list@python.org>
	<1189979679.969074.216490@y42g2000hsy.googlegroups.com>
	<1189981681.745195.18130@y42g2000hsy.googlegroups.com>
	<1189983233.709832.124290@19g2000hsx.googlegroups.com>
	<1189984913.956999.163100@n39g2000hsh.googlegroups.com>
	<1189990689.259451.232570@g4g2000hsf.googlegroups.com>
	<mailman.633.1189994413.2658.python-list@python.org>
Message-ID: <1190007033.673035.239920@57g2000hsv.googlegroups.com>

On Sep 16, 8:59?pm, "J. Cliff Dyer" <j... at sdf.lonestar.org> wrote:
> mensana... at aol.com wrote:
> > The very presence of an algorithm to detect encoding is a bug.
> > Files with they .txt extension should always be treated as ANSI
> > even if they contain binary data. Notepad should never be
> > allowed to try to decide what the encoding is if the the open
> > dialog has the encoding set to ANSI.
>
> Mmmmm, yeah....  I'm going to have to go ahead and, uh, disagree with
> you there.
>
> If I open a text file in WordPad, and then do a save as, I get the
> following choices, all specifying an extension of .txt
>
> Text Document
> Text Document - MS-DOS Format
> Unicode Document
>
> If Microsoft offers to create documents in three different formats with
> the same extension, it damn well better make some effort to figure out
> which one it's trying to open when it reopens those same documents.

No, it should NOT. Unless it can do it with absolute
100% guarantee that it can get it right.

Since it cannot, it should be left to the user to
specify the encoding.

>
> Cheers,
> Cliff




From michele.simionato at gmail.com  Wed Sep 12 06:32:59 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: Wed, 12 Sep 2007 10:32:59 -0000
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
Message-ID: <1189593179.073324.104680@d55g2000hsg.googlegroups.com>

On Sep 12, 12:21 pm, Charles Fox <charles.... at gmail.com> wrote:
> I've just started playing around with Python, as a possible
> replacement for a mix of C++, Matlab and Lisp.  The language looks
> lovely and clean with one huge exception:  I do a lot of numerical
> modeling, so I deal with objects (like neurons) described
> mathematically in papers, by equations like
>     a_dot = -k(a-u)
> In other languages, this translates nicely into code, but as far as I
> can tell, Python needs the ugly:
>     self.a_dot = -self.k(self.a-self.u)
> For large equations this is going to make my code seriously unreadable
> to the point of needing to switch back to Matlab -- and it seems to go
> against everything else about python's simplicity and elegance.  Am I
> missing something?  Is there something like a 'with' command that lets
> me set the scope, like
>
>     with self:
>       .a_dot = -.k(.a-.u)
>
> It's premature to make language suggestions as I am new to the
> language, but I would have though that making a 'with self' explicit
> in all methods would have been neat, so I could just write
>       .a_dot = -.k(.a-.u)
> which would still avoid confusion with local function variables, since
> '.a' is different from 'a'.
>
> Please help if I am missing something -- this looks like a great
> language but I am going to mad trying to read numerical code full of
> 'self.'s breaking up the equations.

You can always use aliases

a = self.a
u = self.u
...

or even s = self

or play games with dictionaries.


 Michele Simionato



From jaywgraves at gmail.com  Wed Sep 19 11:39:42 2007
From: jaywgraves at gmail.com (jay graves)
Date: Wed, 19 Sep 2007 15:39:42 -0000
Subject: psycopg2 or pygresql?
In-Reply-To: <1190214385.994370.167750@r29g2000hsg.googlegroups.com>
References: <1190214385.994370.167750@r29g2000hsg.googlegroups.com>
Message-ID: <1190216382.962347.88880@d55g2000hsg.googlegroups.com>

On Sep 19, 10:06 am, "exhuma.twn" <exh... at gmail.com> wrote:
> And before someone says: "Use the DictCursor-factory to access column
> names". Yes I can do that. But a dict does not guarantee the same
> order of keys as the columns were specified in the query.

But you can iterate over the cursor.description sequence and then look
up the column value (by name or index).  I haven't specifically tried
this with your setup but I have used it with various DBAPI2 compliant
modules.  (SQLite, pyodbc, win32 odbc, etc)  There are lots of goodies
in the cursor.description but each implementation varies on what it
provides.  Check out the PEP for more info.

http://www.python.org/dev/peps/pep-0249/

HTH.
Jay



From xah at xahlee.org  Tue Sep 11 06:46:50 2007
From: xah at xahlee.org (Xah Lee)
Date: Tue, 11 Sep 2007 03:46:50 -0700
Subject: printing list containing unicode string
In-Reply-To: <mailman.352.1189478991.2658.python-list@python.org>
References: <1189432793.383166.156710@d55g2000hsg.googlegroups.com>
	<1189477580.214510.212420@22g2000hsm.googlegroups.com>
	<mailman.352.1189478991.2658.python-list@python.org>
Message-ID: <1189507610.976066.247500@k79g2000hse.googlegroups.com>

J. Cliff Dyer wrote:
"  ...UCS-2, for example, is a fixed width, 2-byte encoding that can
handle any unicode code point up to 0xffff, but cannot handle the 3
and 4 byte extension sets. "

I was going to reply to say that this is a good point. But on my way i
looked up wikipedia,
http://en.wikipedia.org/wiki/UTF-16/UCS-2

quote:
" In computing, UTF-16 (16-bit Unicode Transformation Format) is a
variable-length character encoding for Unicode, capable of encoding
the entire Unicode repertoire. "

and
" UCS-2 (2-byte Universal Character Set) is an obsolete character
encoding which is a predecessor to UTF-16. The UCS-2 encoding form is
nearly identical to that of UTF-16, except that it does not support
surrogate pairs and therefore can only encode characters in the BMP
range U+0000 through U+FFFF. "

So, the matter isn't simple. (i.e. it is not decisive to say i'm
incorrect in my original criticism about that article's statement on
utf-8.)

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

Btw, i think i should mention, that i have read from cover to cover
the unicode 3 specification in 2002. (one heavy, thick, large, deep
blue colored book)

Another resource that contributed my understanding of unicode, is the
book
"CJKV Information Processing" by Ken Lunde, which i read in the same
year.

Also of interest, is that i learned about a year ago, the chinese
encoding
http://en.wikipedia.org/wiki/GB_18030
which is required by law for all computers sold in China to support,
is actually a Unicode encoding. Specifically, in encompasses all the
chars in Unicode.

Also relevant info in our discussion, is that recently i was looking
at alexa.com's web ranking:

http://alexa.com/site/ds/top_sites?ts_mode=global&lang=none

and noticed several pure chinese lang websites are among the top 100.

Baidu.com (??) is at top 8 today, followed by
??? (http://www.qq.com) at 12, and
?? sina.com.cn at 19, etc.

It is somewhat amazing in the context of computing and languages. No
other non-English lang comes close.

(Note here also, Chinese as measured by number of speakers, is roughly
4 times that of English.
http://en.wikipedia.org/wiki/Ethnologue_list_of_most_spoken_languages
This fact, coupled with developement and commercialization of China in
the past decade, are reasons of the above web ranking result.
)

Not relevant in our discussion, but I happend to also notice a site
named youporn.com (was ranked 69 few weeks ago). youporn.com is
basically like youtube.com, but with porn vids. It has long been my
thought, that the progress of humanity in a society can be measured as
by its popularity and acceptance of porn. (in fact i recall seeing
some academic (or not) report about this few months ago... couldn't
remember where now) Society as a whole, have improved dramatically
since the communication revolution in particulart started with the
web.

(see Xah's Porn Outspeak
http://xahlee.org/PageTwo_dir/Personal_dir/porn_movies.html

For more info about youtube.com, see:

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

curious party might also check out

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

which is a major phenomenon, in my opinion, contributed to the
progress of humanities far more than, say, any university or
educational institution.

(my thesis in general in this direction, is that communication, the
main media of knowledge, is the utmost factor in human animal's
progress with respect to what's generally considered humanitarianism.
More important than, say, the need to decry war, have laws, maintain
peace, spread gospels, aid the poor, ... etc. (and in fact, in this
thesis, i consider what commonly considered as good activities such as
aiding the poor, or any moral attitude and activities about good of
humanity (such as OpenSource), are in fact criminal in their effects
and almost in their intention too ...)) )

PS for some reason message posted thru google groups service since the
past week or so are stripping off the unicode chars double angle
brackets (U+00AB and U+00BB). For that reason, in this msg i've also
used double curly quotes "" whenever i have double angle brackets.

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



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Sep 24 08:46:13 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 24 Sep 2007 14:46:13 +0200
Subject: An Editor that Skips to the End of a Def
In-Reply-To: <D2WIi.28146$eY.22404@newssvr13.news.prodigy.net>
References: <ffxIi.686$6p6.510@newssvr25.news.prodigy.net>
	<87odfxjn16.fsf@rudin.co.uk>
	<oKxIi.27994$eY.18915@newssvr13.news.prodigy.net>
	<87hclpjm3a.fsf@rudin.co.uk>
	<tfAIi.51111$Um6.44314@newssvr12.news.prodigy.net>
	<YPGIi.54591$YL5.26012@newssvr29.news.prodigy.net>
	<874phou1pa.fsf@benfinney.id.au>
	<e8HIi.3303$4J3.1378@newssvr22.news.prodigy.net>
	<46f3708c$0$32593$426a74cc@news.free.fr>
	<D2WIi.28146$eY.22404@newssvr13.news.prodigy.net>
Message-ID: <46f7b182$0$27658$426a74cc@news.free.fr>

W. Watson a ?crit :
(top-post corrected)
> Bruno Desthuilliers wrote:
>> W. Watson a ?crit :
>>> How about in the case of MS Win?
>>>
>>> Ben Finney wrote:
>>>>
>>>> (Please don't top-post. Instead, reply below each point to which
>>>> you're responding, removing quoted text irrelevant to your response.)
>>>>
>>
>> Wayne, may I second Ben on his suggestion to stop top-posting ?
> 
 > Well, you may. Unfortunately, there are many NGs that do the opposite.
 >
Unfortunately (for you at least), c.l.p is not one of those.


From carsten at uniqsys.com  Wed Sep 26 14:35:06 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Wed, 26 Sep 2007 14:35:06 -0400
Subject: regex with specific list of string
In-Reply-To: <46FAA145.8050406@decode.com.ar>
References: <1190821357.753909.178210@50g2000hsm.googlegroups.com>
	<fde2i4$9k1$1@sea.gmane.org> <1190827835.3397.76.camel@dot.uniqsys.com>
	<46FAA145.8050406@decode.com.ar>
Message-ID: <1190831706.3397.94.camel@dot.uniqsys.com>

On Wed, 2007-09-26 at 15:13 -0300, Pablo Ziliani wrote:
> Carsten Haese wrote:
> > Unfortunately, that also matches margarine, mayonnaise, and octopus,
> > just to name a few ;-)
> 
> (and so does the solution you sent before :)

No, it doesn't.

>>> s = set(['jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug',
... 'sep', 'oct', 'nov', 'dec'])
>>> 'margarine' in s
False
>>> 'mayonnaise' in s
False
>>> 'octopus' in s
False

> This is fine IMO since the OP didn't specify the opposite.

True, but my crystal ball tells me that the OP wants exact matches.
(Extrapolating from another post made by the OP earlier today, I'm
guessing he has a list of column names to include in an SQL "order by"
clause, and he wants to check them for validity first.)

-- 
Carsten Haese
http://informixdb.sourceforge.net




From xkenneth at gmail.com  Sat Sep  8 20:04:56 2007
From: xkenneth at gmail.com (xkenneth)
Date: Sun, 09 Sep 2007 00:04:56 -0000
Subject: Organizing Code - Packages
In-Reply-To: <mailman.281.1189283755.2658.python-list@python.org>
References: <1189177596.960379.244990@w3g2000hsg.googlegroups.com>
	<46e17143$0$6189$426a74cc@news.free.fr>
	<1189183088.922537.18290@r34g2000hsd.googlegroups.com>
	<87r6laa0ir.fsf@rudin.co.uk>
	<46e1a0bc$0$7689$9b4e6d93@newsspool2.arcor-online.net>
	<1189280539.449868.169910@22g2000hsm.googlegroups.com>
	<mailman.281.1189283755.2658.python-list@python.org>
Message-ID: <1189296296.175857.158770@22g2000hsm.googlegroups.com>

On Sep 8, 3:35 pm, David <wizza... at gmail.com> wrote:
> > How do import statements that are declared at the top of a python
> > module work?
>
> http://docs.python.org/tut/node8.html

On Sat, 08 Sep 2007 12:42:19 -0700, xkenneth wrote:
> How do import statements that are declared at the top of a python
> module work?

They import the module.  ;-)
> for instance....
> from MyModule.Objects import *

> class Class:
>       def function:
>            #here i cannot access the things that should have been
> imported from the above statement
>            #i printed the dir() function to verify this


Sorry I don't believe this.  This doesn't even compile because the
method
`function()` lacks the arguments in the definition.  Please post
actual
code and actual tracebacks you get.
And `MyModule` is a bad name for a package.

Ciao,
        Marc 'BlackJack' Rintsch

Code doesn't compile in python. This is pseudo code anyways.
Can't post actual code and tracebacks because the code is proprietary.
"MyModule" is pseudo code, and i forgot the arguments, the actual code
and errors are unimportant for this question.



From bj_666 at gmx.net  Sat Sep  8 16:18:51 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 8 Sep 2007 20:18:51 GMT
Subject: Organizing Code - Packages
References: <1189177596.960379.244990@w3g2000hsg.googlegroups.com>
	<46e17143$0$6189$426a74cc@news.free.fr>
	<1189183088.922537.18290@r34g2000hsd.googlegroups.com>
	<87r6laa0ir.fsf@rudin.co.uk>
	<46e1a0bc$0$7689$9b4e6d93@newsspool2.arcor-online.net>
	<1189280539.449868.169910@22g2000hsm.googlegroups.com>
Message-ID: <5kgedbF33dv5U4@mid.uni-berlin.de>

On Sat, 08 Sep 2007 12:42:19 -0700, xkenneth wrote:

> How do import statements that are declared at the top of a python
> module work?

They import the module.  ;-)

> for instance....
> 
> from MyModule.Objects import *
> 
> class Class:
>       def function:
>            #here i cannot access the things that should have been
> imported from the above statement
>            #i printed the dir() function to verify this

Sorry I don't believe this.  This doesn't even compile because the method
`function()` lacks the arguments in the definition.  Please post actual
code and actual tracebacks you get.

And `MyModule` is a bad name for a package.

Ciao,
	Marc 'BlackJack' Rintsch


From bdesth.quelquechose at free.quelquepart.fr  Mon Sep  3 10:53:40 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 03 Sep 2007 16:53:40 +0200
Subject: function call
In-Reply-To: <1188937059.459609.61850@57g2000hsv.googlegroups.com>
References: <1188937059.459609.61850@57g2000hsv.googlegroups.com>
Message-ID: <46ddc12c$0$24997$426a74cc@news.free.fr>

ianar? a ?crit :
> Hey all,
> 
> Is there a way of printing out how a function was called? In other
> words if I do the following:
> 
> def someFunction(self):
>     self.someOtherFunction(var1, var2)
> 
> 
> I would get something like "someOtherFunction: called by:
> someFunction, args are: var1, var2"
> 
> Thanks in advance
> 
You may be able to solve this using a decorator (to avoid polluting your 
code with this) and the infamous sys._getframe() hack.


From carsten at uniqsys.com  Wed Sep 26 13:30:35 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Wed, 26 Sep 2007 13:30:35 -0400
Subject: regex with specific list of string
In-Reply-To: <fde2i4$9k1$1@sea.gmane.org>
References: <1190821357.753909.178210@50g2000hsm.googlegroups.com>
	<fde2i4$9k1$1@sea.gmane.org>
Message-ID: <1190827835.3397.76.camel@dot.uniqsys.com>

On Wed, 2007-09-26 at 12:49 -0400, Steve Holden wrote:
> james_027 wrote:
> > hi,
> > 
> > how do I regex that could check on any of the value that match any one
> > of these ... 'jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug',
> > 'sep', 'oct', 'nov', 'dec'
> > 
> > Thanks
> 
>  >>> patr = re.compile('jan|feb|mar|apr|may|jun|jul|aug|sep|nov|oct|dec')
>  >>> patr.match("jul")
> <_sre.SRE_Match object at 0x7ff28ad8>
>  >>> patr.match("nosuch")

Unfortunately, that also matches margarine, mayonnaise, and octopus,
just to name a few ;-)

-- 
Carsten Haese
http://informixdb.sourceforge.net




From tim.couper at scivisum.co.uk  Sat Sep  1 04:32:58 2007
From: tim.couper at scivisum.co.uk (Tim Couper)
Date: Sat, 01 Sep 2007 09:32:58 +0100
Subject: Important Research Project
In-Reply-To: <13dhm7uec5sp855@corp.supernews.com>
References: <13ddcvm1bsu3s94@corp.supernews.com>
	<13dhm7uec5sp855@corp.supernews.com>
Message-ID: <46D923BA.5020409@scivisum.co.uk>

a. If you had no response from a mailing, it probably means you have no 
takers.

b. The fact that you send a request about a perl development to a python 
mailing list raises concerns about your understanding of the nature of 
this interest group

c. The technology you are trying to develop seems to be well developed 
in, for example, python.

d. If you are in academia, you should be able to readily find comp sci 
undergrads or graduates who might be able to help you for a 
comparatively small  remuneration.

Tim

Dr Tim Couper
CTO, SciVisum Ltd

www.scivisum.com



E.D.G. wrote:
> "E.D.G." <edgrsprj at ix.netcom.com> wrote in message
> news:13ddcvm1bsu3s94 at corp.supernews.com...
>   
>> Important Research Project  (Related to computer programming)
>>
>> Posted by E.D.G. on August 30, 2007 edgrsprj at ix.netcom.com
>>     
>
>     This effort was not successful.  And I am returning to trying to slowly
> make progress with the computer program I have been developing.
>
>     I was hoping that there might be some people who had Perl chart and .exe
> generation programs running on their own computer who could say, "Here is
> how to merge them with Perl; here is how to use them; this is what they will
> do, etc."  Or, I was hoping that someone would respond and say that although
> they are using Fortran or Basic etc. instead of Perl, they would be
> interested in getting a copy of Perl running, determine how to get those
> routines running, and then pass along the information.  That would have
> saved some time.
>
>     I work on these projects all the time.  And it has been my experience
> that the world of science does not have the type of organized structure at
> this time to enable people to easily obtain that type of assistance.  I have
> established an organization which will hopefully help with that problem.  It
> might be going public at a Web site some time in the next year.
>
> There were some questions regarding the computer program I discussed.  This
> is what it does:
>
>     It provides researchers with the a certain amount of ability to
> determine if different events are somehow linked with one another.  For
> example, it can be used to compare two or more earthquakes, earthquakes and
> electromagnetic pulses, tornados and electromagnetic pulses, and even
> earthquakes and tornados etc.
>
>     It makes it possible for people to study events taking place deep in the
> Earth by evaluating electromagnetic pulse data associated with those events.
> Under the right conditions it can be used to forecast earthquakes.  That is
> the reason it was developed in the first place.  You can see the type of
> data it generates at the following Web page:
>
> http://www.freewebz.com/eq-forecasting/Data.html
>
>     The plan is that when it has chart and standalone .exe program file
> generation capabilities, program copies will be circulated within the
> earthquake forecasting community in the People's Republic of China.  It was
> discussed in detail there at a scientific conference in December of 2003.
> At that time it was too complex for widespread use.
>
>     After the chart feature becomes operational etc. I am also planning to
> contact U.S. government officials to see if one or more lectures can be
> organized regarding the basic technology and theories, and the program's
> capabilities.
>
> These are personal opinions.
>
>
>   


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Sep 12 18:45:08 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 13 Sep 2007 00:45:08 +0200
Subject: struct is saving 4 bytes instead of 2
References: <1189632217.661924.25520@r34g2000hsd.googlegroups.com>
Message-ID: <5kr8fkF53m8gU1@mid.individual.net>

TonyB wrote:

> When I inspect the file with a hex editor it show that the
> variable is being saved as 4 bytes.  How can I make it save the
> value as 2 bytes?

Use an aligment specifier in the format string (you want "standard"
alignment). See:

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

Regards,


Bj?rn

-- 
BOFH excuse #428:

Firmware update in the coffee machine



From steve at holdenweb.com  Wed Sep  5 19:46:21 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 05 Sep 2007 16:46:21 -0700
Subject: Text processing and file creation
In-Reply-To: <1189027883.834083.291430@19g2000hsx.googlegroups.com>
References: <1189008809.718361.45790@g4g2000hsf.googlegroups.com>
	<1189027883.834083.291430@19g2000hsx.googlegroups.com>
Message-ID: <fbnf4e$hmr$1@sea.gmane.org>

Arnaud Delobelle wrote:
[...]
> from my_useful_functions import new_file, write_first_5_lines,
> done_processing_file, grab_next_5_lines, another_new_file, write_these
> 
> in_f = open('myfile')
> out_f = new_file()
> write_first_5_lines(in_f, out_f) # write first 5 lines
> close(out_f)
> while not done_processing_file(in_f): # until done processing
>    lines = grab_next_5_lines(in_f) # grab next 5 lines
>    out_f = another_new_file()
>    write_these(lines, out_f) # write these
>    close(out_f)
> print "all done!" # All done
> print "Now there are 4000 files in this directory..."
> 
> Python 3.0 - ready (I've used open() instead of file())
> 
bzzzzzzzzzzt!

Python 3.0a1 (py3k:57844, Aug 31 2007, 16:54:27) ...
Type "help", "copyright", "credits" or "license" for more information.
 >>> print "all done!" # All done
   File "<stdin>", line 1
     print "all done!" # All done
                     ^
SyntaxError: invalid syntax
 >>>

Close, but no cigar ;-)

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden
--------------- Asciimercial ------------------
Get on the web: Blog, lens and tag the Internet
Many services currently offer free registration
----------- Thank You for Reading -------------



From musiccomposition at gmail.com  Sun Sep  9 22:18:51 2007
From: musiccomposition at gmail.com (Benjamin)
Date: Mon, 10 Sep 2007 02:18:51 -0000
Subject: Spell-checking Python source code
In-Reply-To: <1189285495.185657.88010@o80g2000hse.googlegroups.com>
References: <1189285495.185657.88010@o80g2000hse.googlegroups.com>
Message-ID: <1189390731.697842.297060@22g2000hsm.googlegroups.com>

On Sep 8, 4:04 pm, John Zenger <johnzen... at gmail.com> wrote:
> To my horror, someone pointed out to me yesterday that a web app I
> wrote has been prominently displaying a misspelled word.  The word was
> buried in my code.
>
> Is there a utility out there that will help spell-check literal
> strings entered into Python source code?  I don't mean spell-check
> strings entered by the user; I mean, go through the .py file, isolate
> strings, and tell me when the strings contain misspelled words.  In an
> ideal world, my IDE would do this with a red wavy line.
>
> I guess a second-best thing would be an easy technique to open a .py
> file and isolate all strings in it.
>
> (I know that the better practice is to isolate user-displayed strings
> from the code, but in this case that just didn't happen.)

This is when it's good to use put all your UI strings in a file and
get the advantages of spelling checking ease and the ability to
translate the app.



From grante at visi.com  Tue Sep  4 17:32:49 2007
From: grante at visi.com (Grant Edwards)
Date: Tue, 04 Sep 2007 21:32:49 -0000
Subject: Looking for Delaunay triangulation module...
References: <13dge9m2339ka68@corp.supernews.com>
	<mailman.300.1188775070.28954.python-list@python.org>
	<13doa5l2r5dmg2b@corp.supernews.com>
Message-ID: <13drjo14475bv17@corp.supernews.com>

On 2007-09-03, Grant Edwards <grante at visi.com> wrote:
> On 2007-09-02, Robert Kern <robert.kern at gmail.com> wrote:
>
>>> Can anybody point me to a Delaunay triangulation module (for
>>> Win32)?  I'm currently using
>>> http://flub.stuffwillmade.org/delny/ under Linux, but I have
>>> been unable to find a build for Windows. I don't have the
>>> tools (or skills) to build libqhull and Python extensions on
>>> Win32).
>>> 
>>> I've also found the delaunay module in scipy's "sandbox".  I
>>> could never get that module to work under Linux, and I can't
>>> build it for Windows anyway.

> I do have Dlaunay triangulation working using VTK (which is
> included in Enthought Python),

Well, of course that doesn't work under Windows either. Doing
an "import vtk" crashes the python interpreter.

How people get any work at all done using Winodows is beyond me...

-- 
Grant Edwards                   grante             Yow! Everybody gets free
                                  at               BORSCHT!
                               visi.com            


From rustompmody at gmail.com  Tue Sep 18 02:21:28 2007
From: rustompmody at gmail.com (Rustom Mody)
Date: Tue, 18 Sep 2007 11:51:28 +0530
Subject: can Python be useful as functional?
In-Reply-To: <1i4lvih.8g4kwjijx8e2N%aleax@mac.com>
References: <1190073045.618869.261290@k79g2000hse.googlegroups.com>
	<mailman.696.1190092326.2658.python-list@python.org>
	<1i4lvih.8g4kwjijx8e2N%aleax@mac.com>
Message-ID: <f46c52560709172321w5c383fb9x13ac119733e704ce@mail.gmail.com>

On 9/18/07, Alex Martelli <aleax at mac.com> wrote:
> Rustom Mody <rustompmody at gmail.com> wrote:
>
> > Can someone help? Heres the non-working code
> >
> > def si(l):
> >     p = l.next()
> >     yield p
> >     (x for x in si(l) if x % p != 0)
> >
> > There should be an yield or return somewhere but cant figure it out
>
> Change last line to
>
>     for x in (x for x in si(l) if x % p != 0): yield x


Thanks but why does

(yield(x) for x in si(l) if x % p != 0)

not work? I would have expected generator expression to play better
with generators.

More generally, if one wants to 'splice in' a generator into the body
of a generator, is there no standard pythonic idiom?


From semenick at ix.netcom.com  Fri Sep 14 17:14:23 2007
From: semenick at ix.netcom.com (PaulS)
Date: Fri, 14 Sep 2007 17:14:23 -0400
Subject: where is help file?
References: <13el4vvna6jildc@corp.supernews.com>
	<mailman.539.1189779786.2658.python-list@python.org>
	<46eab4bc$0$3811$5402220f@news.sunrise.ch>
	<mailman.547.1189788809.2658.python-list@python.org>
	<slrnfelfo6.sg.horpner@FIAD06.norwich.edu>
Message-ID: <13elue14tkkj530@corp.supernews.com>

Thanks everyone.
Paul


"Neil Cerutti" <horpner at yahoo.com> wrote in message 
news:slrnfelfo6.sg.horpner at FIAD06.norwich.edu...
> On 2007-09-14, Carsten Haese <carsten at uniqsys.com> wrote:
>> On Fri, 2007-09-14 at 18:20 +0200, Martin Blume wrote:
>>> AFAIK you have to import the module first, before you can get
>>> help on that module.
>>
>> While that is true of the help(module_name) form, this is not
>> necessary in the interactive helper you start by calling
>> help().
>
> The interactive help function is cool. You need to download and
> install the HTML version of the standard docs to take the utmost
> advantage of it.
>
> -- 
> Neil Cerutti 




From Shawn at Milochik.com  Fri Sep 14 09:41:00 2007
From: Shawn at Milochik.com (Shawn Milochik)
Date: Fri, 14 Sep 2007 09:41:00 -0400
Subject: How to Start
In-Reply-To: <fcd1nb$8cu$1@daisy.noc.ucla.edu>
References: <MPG.215360ba6684d43b9896d5@news.cox.net>
	<fcd1nb$8cu$1@daisy.noc.ucla.edu>
Message-ID: <2dc0c81b0709140641ra90aee0r485b270280bd6a9@mail.gmail.com>

On 9/14/07, James Stroud <jstroud at mbi.ucla.edu> wrote:
>
> Here's your recipe:
>
>    1. begin coding until you hit a wall
>    2. read official tutorial until you figure out a solution
>    3. experiment in interactive interpreter
>    4. goto 1.
>
> I know this sounds obvious, but its the best way to jumpstart.
>
> James
> --

What a beautiful way of putting it! That's what I do all the time,
although sometimes my bookshelf or Google is a stand-in for #2. I try
not to post to the list before I have working code.

You know, if you could make that process into a haiku, you could just
make that your sig and answer nearly every question that hits this
list. ^_^

I wonder whether lists like this hurt more people than they help,
because it's too easy to ask for help too soon. Those of you who
consistently  give the best advice didn't learn by asking for help
every step along the way, did you? Is it really teaching a man to fish
if you bait his line and tell him where to cast?

Shawn


From david at boddie.org.uk  Mon Sep 17 08:38:29 2007
From: david at boddie.org.uk (David Boddie)
Date: Mon, 17 Sep 2007 14:38:29 +0200
Subject: QPicture and Qpainter PyQt4
Message-ID: <200709171438.29751.david@boddie.org.uk>

On Mon Sep 17 09:29:43 CEST 2007, luca72 wrote:

> class PictureFrame(QtGui.QFrame):
> 
>   def __init__(self, parent = None):
>     QFrame.__init__(self, parent)
>     picture = QtGui.QPicture()
> 
>   def paintEvent(self, event):
>     picture.load('dis.pic')
>     gr = QtGui.QPainter()
>     gr.begin(self.frame)
>     gr.drawPicture(0, 0, picture)
>     gr.end()
> 
> But nothing is paint.
> Can you give me some help

You should probably be painting on "self" instead of "self.frame".

It may not be related to your problem, but why don't you store the picture in
"self.picture" rather than the local "picture" variable?

David


From arkanes at gmail.com  Mon Sep 10 11:57:08 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Mon, 10 Sep 2007 10:57:08 -0500
Subject: Checking if elements are empty
In-Reply-To: <slrnfeaoed.b4.horpner@FIAD06.norwich.edu>
References: <2323A6D37908A847A7C32F1E3662C80E010A0246@dc1ex01.air.org>
	<fbme5d$qa$1@sea.gmane.org>
	<mailman.93.1189003016.2658.python-list@python.org>
	<fbqedh$31g$1@lust.ihug.co.nz>
	<46e115e5$0$7691$9b4e6d93@newsspool2.arcor-online.net>
	<fbsqqs$efc$2@lust.ihug.co.nz>
	<46e2013a$0$7687$9b4e6d93@newsspool2.arcor-online.net>
	<slrnfead5j.mo.horpner@FIAD06.norwich.edu>
	<mailman.321.1189434264.2658.python-list@python.org>
	<slrnfeaoed.b4.horpner@FIAD06.norwich.edu>
Message-ID: <4866bea60709100857h352ca96fq3e9259ba5b083e92@mail.gmail.com>

On 9/10/07, Neil Cerutti <horpner at yahoo.com> wrote:
> On 2007-09-10, Chris Mellon <arkanes at gmail.com> wrote:
> > On 9/10/07, Neil Cerutti <horpner at yahoo.com> wrote:
> >> On 2007-09-08, Wildemar Wildenburger <lasses_weil at klapptsowieso.net> wrote:
> >> > Lawrence D'Oliveiro wrote:
> >> >>>>> if y[0]:
> >> >>>> Not a good idea.
> >> >>> Why not?
> >> >>
> >> >> Because there is a situation where your version of the test
> >> >> will fail even if the first element of y is non-null.
> >> >
> >> > Such as? Seriously people, a little more verbosity wouldn't
> >> > hurt here. This isn't a mystery game.
> >>
> >> >>> if "": True
> >> ...
> >> >>> if 0: True
> >> ...
> >> >>> if []: True
> >> ...
> >> >>> if {}: True
> >> ...
> >> >>> if None: True
> >> ...
> >>
> >> That's may not be all the possibilities. Lots of Python objects
> >> can evaluate to false in a boolean context.
> >
> > All of these except 0 and None will also return False if you
> > check the length. In fact, I am not aware of any builtin where
> > len() will return 0, but it will be true in a boolean context.
> >
> > If you're advocating being more specific in the hope of
> > catching errors, this is a pretty terrible example. The OP
> > wasn't checking for "null", whatever that means - he was
> > checking for the empty string, in a list known (or intended) to
> > contain only strings. The simple boolean check is totally
> > appropriate.
>
> Agreed; but I prefer 'if y[0] == ""', absent more context and
> better names.
>

Probably should use u"" if you're going to take that route, as this
will fail spuriously if y[0] contains a unicode string that can't be
implicitly converted to ascii. Personally, I prefer the boolean check
and I'll let operations fail elsewhere if there's a type mismatch.


From bronger at physik.rwth-aachen.de  Sat Sep  8 12:52:57 2007
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Sat, 08 Sep 2007 18:52:57 +0200
Subject: /dev/null as a file-like object, or logging to nothing
Message-ID: <87k5r1jdzq.fsf@wilson.homeunix.com>

Hall?chen!

Is there a portable and simply way to direct file-like IO to simply
nothing?  I try to implement some sort of NullLogging by saying

--8<---------------cut here---------------start------------->8---
import logging
if options.logging:
    logging.basicConfig(level=logging.DEBUG, filename=options.logfile, filemode="w",
                        format='%(asctime)s %(name)s %(levelname)s   %(message)s')
else:
    # redirect logging to a memory buffer in order to simply ignore it.
    import StringIO
    logging.basicConfig(stream=StringIO.StringIO())
--8<---------------cut here---------------end--------------->8---

However, this consumes memory.  Is there a better way?

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                      Jabber ID: bronger at jabber.org
                      (See http://ime.webhop.org for ICQ, MSN, etc.)


From rowen at cesmail.net  Wed Sep 12 15:15:04 2007
From: rowen at cesmail.net (Russell E. Owen)
Date: Wed, 12 Sep 2007 12:15:04 -0700
Subject: Tkinter pack difficulty
References: <1189617737.700363.187450@g4g2000hsf.googlegroups.com>
Message-ID: <rowen-B40CB5.12150412092007@gnus01.u.washington.edu>

In article <1189617737.700363.187450 at g4g2000hsf.googlegroups.com>,
 Simon Forman <sajmikins at gmail.com> wrote:

> Hi all,
> 
> I realize this is more of a Tk question than a python one, but since
> I'm using python and don't know Tcl/Tk I figured I'd ask here first
> before bugging the Tcl folks.
> 
> I am having a terrible time trying to get a pack() layout working.
> 
> I have three frames stacked top to bottom and stretching across the
> master window from edge to edge.
> 
> Crude ASCII Art rendition of the frames:
> 
> ============
> |  header  |
> ------------
> |   body   |
> ------------
> |   log    |
> ============
> 
> 
> I want the header and log frames to have a fixed height (and stick to
> the top and bottom, respectively, of the master frame) and the body
> frame to expand to fill the rest of the space, for instance if the
> window is maximized.
> 
> Here is a simple script that /almost/ does what I want.   I've been
> tweaking the pack() options for three hours and I just can't seem to
> get the effect I want.  This /can't/ really be this hard can it?
> 
> If you run the script, be aware that since there are only frame
> widgets the window will initially be very very tiny.  If you expand or
> maximize the window you'll see a thin black frame at the top, yay, a
> thin white frame at the bottom, yay, but the middle grey "body" frame
> will NOT span the Y axis, boo.
> 
> It's there, and stretches from side to side, but it refuses to stretch
> top to bottom.  Adding a widget (say, a Text) doesn't help, the light
> grey non-frame rectangles remain.
> 
> My investigations seem to indicate that the light grey bars are part
> of something the Tk docs call a "parcel" that each slave widget gets
> packed into.  Apparently the "header" and "log" frames don't use their
> entire parcels, but I don't know how to get the parcels themselves to
> "shrinkwrap" to the size of the actual Frame widgets.
> 
> In any event,  my head's sore and I'm just about ready to take out
> some graph paper and use the grid() layout manager instead.  But I
> really want the automatic resizing that the pack() manager will do,
> rather than the static layout grid() will give me.

The grid layout manager is the obvious choice for this and it is 
dynamic. (There is a place geometry manager that works with coordinates, 
but I don't recommend that for this case).

Grid the top/middle/bottom frame in row = 0/1/2, column = 0
then use row_configure to set the weight of the middle frame to 1.
You may also have to set sticky to "news" when you grid all the frames.

In general I suggest you use grid unless it's something simple like a 
row of buttons.

But never try to both grid and pack anything into the in the same parent 
widget. You'll get a crash or an infinite loop. (You can grid frames 
that have widgets packed inside them, but you can't grid grid some items 
into a frame and then pack some more into the same frame)

-- Russell


From martin at v.loewis.de  Fri Sep 28 18:22:04 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 29 Sep 2007 00:22:04 +0200
Subject: Python and SSL
In-Reply-To: <1191014203.366766.257640@d55g2000hsg.googlegroups.com>
References: <1190959345.041723.108130@k79g2000hse.googlegroups.com>
	<6cydncA2Jpv082DbnZ2dnUVZ_q6dnZ2d@comcast.com>
	<1191014203.366766.257640@d55g2000hsg.googlegroups.com>
Message-ID: <46fd7e8c$0$18410$9b622d9e@news.freenet.de>

> I heard that python 2.6 will include full "server-side SSL
> support" (whatever this means).
> Is it true?

Yes, that's true.

Regards,
Martin


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From doug at dougma.com  Mon Sep 10 22:34:01 2007
From: doug at dougma.com (Douglas Napoleone)
Date: Mon, 10 Sep 2007 22:34:01 -0400
Subject: [PyCON-Organizers] Next PyCon Organizers' Meeting Tuesday,
	11 September
In-Reply-To: <18149.64774.138831.976974@montanaro.dyndns.org>
References: <46E5CFAB.8090802@python.org>
	<18149.64774.138831.976974@montanaro.dyndns.org>
Message-ID: <f08f4fbb0709101934r6c0d5a60i6ad2aaf266f63a98@mail.gmail.com>

I have found that jabber accounts no longer work, but google accounts
do. I had a jabber account, but could never get it working in GAIM. My
google account works fine.

    -Doug


On 9/10/07, skip at pobox.com <skip at pobox.com> wrote:
>
>     David> Connection details:
>     David> http://wiki.python.org/moin/PyCon2008/OrganizersMeetingsConnectionDetails
>
> Ah, now I remember.  GAIM complained:
>
>     400: Malformed Jabber ID
>
> GAIM recorded my Jabber ID as "skip.montanaro at jabber.org" which seems pretty
> well-formed to me.
>
> Skip
> _______________________________________________
> Pycon-organizers mailing list
> Pycon-organizers at python.org
> http://mail.python.org/mailman/listinfo/pycon-organizers
>


From david at nospam.spam  Tue Sep 11 07:07:29 2007
From: david at nospam.spam (david)
Date: Tue, 11 Sep 2007 21:07:29 +1000
Subject: cpython list __str__ method for floats
Message-ID: <13ectngf3aeqrb0@corp.supernews.com>

returns poorly formatted values:

 >>>str(13.3)
'13.3'
 >>>str([13.3])
'[13.300000000000001]'

[david]


From http  Sat Sep 22 23:46:21 2007
From: http (Paul Rubin)
Date: 22 Sep 2007 20:46:21 -0700
Subject: Getting rid of bitwise operators in Python 3?
References: <46f49740$0$32514$4c368faf@roadrunner.com>
	<miaJi.28220$eY.3184@newssvr13.news.prodigy.net>
	<1190484589.890198.266430@y42g2000hsy.googlegroups.com>
	<13fbahtem90fp99@corp.supernews.com>
	<1190506229.092718.41690@g4g2000hsf.googlegroups.com>
	<7xps0achlg.fsf@ruckus.brouhaha.com>
	<1190517836.766461.29570@g4g2000hsf.googlegroups.com>
Message-ID: <7x8x6y3uya.fsf@ruckus.brouhaha.com>

richyjsm at gmail.com writes:
> Well okay, I take that back---I wouldn't mind *writing* it;  I just
> wouldn't expect to get much speed from *running* it. 

I don't see why not.  It's just the basic Python long arithmetic which
is coded in C.  I tested it against gmpy (carefully written asm code
and tuned algorithms) and gmpy's modexp was around 4x faster, but
Python's is plenty fast enough for many purposes.  The 4x ratio is
certainly lower than the usual ratio between Python code and C code.


From bardov at gmail.com  Fri Sep 21 01:31:32 2007
From: bardov at gmail.com (Dan Bar Dov)
Date: Fri, 21 Sep 2007 07:31:32 +0200
Subject: re question
In-Reply-To: <9e95df10709201438i2000c972gd6c63864edeb54a1@mail.gmail.com>
References: <d6944c490709190517t390086d4m915b77b1cef5055a@mail.gmail.com>
	<9e95df10709201438i2000c972gd6c63864edeb54a1@mail.gmail.com>
Message-ID: <d6944c490709202231o49eb43bapa7ab6932698a5a5@mail.gmail.com>

On 9/20/07, Matt McCredie <mccredie at gmail.com> wrote:
>
>
> > Any common knowledge IP matching RE?
>
> I don't know if there is any common knowledge RE, but I came up with
> the following:
>
>
> r"((1\d{2}|2[0-4]\d|25[0-5]|[1-9]\d|\d)\.){3}(1\d{2}|2[0-4]\d|25[0-5]|[1-9]\d|\d)")


Thank you. I will use that!

>
> I generally discourage people from using REs. I think the folowing is
> much easier to read:


Well, I need the regex to be used withing a parser (yeanpypa or
ZestyParser),  so I need it to be a regex to be matched against, and not a
piece  of code .
I could probably use a more simplistic re that does not check numeric
validity, and do that later, but your re would do both matching and
validation in one step.

Dan

def isip(x):
>     octs = x.split(".")
>     if len(octs) != 4:
>         return False
>     for oct in octs:
>         if len(oct) > 1 and oct[0] == "0":
>             return False
>         try:
>             if not 0 <= int(oct) < 256:
>                 return False
>         except ValueError:
>             return False
>     return True
>
> Both solutions seem to work, though I used a small set of test cases.
> Others may have better suggestions.
>
> Matt
>
-------------- next part --------------
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From bignose+hates-spam at benfinney.id.au  Wed Sep 19 23:36:41 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 20 Sep 2007 13:36:41 +1000
Subject: super() doesn't get superclass
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<46efdcaf$0$14241$426a74cc@news.free.fr>
	<876427zhzq.fsf@benfinney.id.au>
	<87k5qn5cwi.fsf@mulj.homelinux.net>
	<87y7f2w0xj.fsf@benfinney.id.au>
	<13f3pbfh7to7k4b@corp.supernews.com>
Message-ID: <873axavwhi.fsf@benfinney.id.au>

Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> writes:

> On Thu, 20 Sep 2007 12:00:40 +1000, Ben Finney wrote:
> 
> > In its latter form, it is worthless to me when I'm looking for
> > "get superclass of A", but its name and parameters and
> > documentation all lead me very strongly to believe otherwise.
> 
> Why are you looking for the superclass of A?

Currently irrelevant to the point. Whether for good or bad reasons, I
looked for a way to "get the superclass of A". Everything about
'super' ? its name, parameter semantics, and documentation ? all
firmly led me to believe that was the correct function for that
purpose.

It's not; as currently implemented, it serves an incompatibly
different purpose.

What I'm pointing out is that it's currently very misleadingly named,
its semantics mislead the programmer about how it will be used, and it
is misleadingly documented. Whether it should be removed entirely or
cleaned up, I don't know; all I can do with my current knowledge is to
point out how it gets in the way as it stands.

-- 
 \     "The truth is the most valuable thing we have. Let us economize |
  `\                      it."  -- Mark Twain, _Following the Equator_ |
_o__)                                                                  |
Ben Finney


From ashutoshkataruka at gmail.com  Thu Sep 13 08:28:48 2007
From: ashutoshkataruka at gmail.com (ashutoshkataruka at gmail.com)
Date: Thu, 13 Sep 2007 05:28:48 -0700
Subject: Make money to share your website
Message-ID: <1189686528.338858.108190@50g2000hsm.googlegroups.com>

goodtolove.com is giving you their 50% revenue to post any websites
(except adult).As well if you have any on website then post them to
get unlimited visitors.



From mail at timgolden.me.uk  Tue Sep 11 11:56:45 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Tue, 11 Sep 2007 16:56:45 +0100
Subject: mod_python and pysvn
In-Reply-To: <1189525797.361829.69380@g4g2000hsf.googlegroups.com>
References: <1189525797.361829.69380@g4g2000hsf.googlegroups.com>
Message-ID: <46E6BABD.4000704@timgolden.me.uk>

Sjoerd wrote:
> Hello all,
> 
> I have a script that uses pySVN. It gets the latest build information.
> I want to create a call to that function in a PSP file but everytime I
> try I get an error message:
> 
> ClientError: Unable to open an ra_local session to URL
> Unable to open repository 'file:///P:/tools/builds/repository'
> 
> does anyone know how I can fix this?

Usually means that the process which Apache is running under
(may well be LocalSystem) doesn't know about or doesn't have
access to p:/tools etc. Assuming that P: is a network drive,
try using its UNC (\\server\share\tools etc.) but even there
I suspect you may have security issues. One way or the other,
you would need to give the Apache service enough security
access to that share/directory for it to do its job.

TJG


From bj_666 at gmx.net  Mon Sep 24 12:02:36 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 24 Sep 2007 16:02:36 GMT
Subject: Can a base class know if a method has been overridden?
References: <1190647436.423328.217670@w3g2000hsg.googlegroups.com>
	<46f7d897$0$25150$426a74cc@news.free.fr>
	<1190648887.051630.168520@r29g2000hsg.googlegroups.com>
Message-ID: <5lq5crF95s07U5@mid.uni-berlin.de>

On Mon, 24 Sep 2007 15:48:07 +0000, Ratko wrote:

> I have a base class EvtHandler that has methods defined to handle
> certain events. You then subclass from EvtHandler and override the
> methods for the events you want to receive. If a method has been
> overridden, the base class will automatically register for those
> events to make sure that they are even delivered to this handler
> (which is why I would need to know whether a method has been
> overridden or not). Of course, there are other ways of doing this
> which would require a bit more work from the subclass... I just
> thought this would be a neat "automatic" way of registering for
> events.
> 
> For example:
> 
> class EvtHandler:
>     def __init__(self):
>         if onKey is overridden:
>              register_for_key_events()
> 
>     def onKey(self):
>         pass
> 
> 
> class MyHandler(EvtHandler):
>     def onKey(self):
>         # do something here....

Maybe "tagging" the original `on_key()`:

class EvtHandler:
    def __init__(self):
        if not hasattr(self.on_key, 'dummy'):
             print 'register_for_key_events()'

    def _dummy_handler(self):
        pass
    _dummy_handler.dummy = True
    
    on_key = _dummy_handler
    on_whatever = _dummy_handler


class MyHandler(EvtHandler):
    def on_key(self):
        print 'Do something...'

Ciao,
	Marc 'BlackJack' Rintsch


From steve at REMOVE-THIS-cybersource.com.au  Sat Sep 15 20:28:56 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sun, 16 Sep 2007 00:28:56 -0000
Subject: how to join array of integers?
References: <1189859762.563599.269270@g4g2000hsf.googlegroups.com>
	<a23effaf0709150551g19c611eqe1c912acf02306d3@mail.gmail.com>
	<mailman.577.1189864628.2658.python-list@python.org>
	<13eo0pbiab4spdf@corp.supernews.com>
Message-ID: <13eou68bs4j938@corp.supernews.com>

On Sat, 15 Sep 2007 16:07:07 +0000, Grant Edwards wrote:


> It's nice people have invented so many ways to spell the builting "map"
> ;)
> 
>>>> ",".join(map(str,[1,2,3]))
> '1,2,3'


The oldest solution, and if not the fastest, at least neck-and-neck with 
the list comprehension.

>>> timeit.Timer("', '.join(map(str, [1,2,3]))", "").repeat()
[5.0320308208465576, 4.1513419151306152, 4.0970909595489502]


For those who missed my earlier post:

list comp, best of three for one million iterations: 4.53 seconds
generator expression: 10.52 seconds
itertools.imap: 8.52 seconds

Your mileage may vary.

I think it is a crying shame that Guido's prejudice against functional 
programming seems to have increased over the years, instead of decreased. 
Iterators are wonderful tools, but professional tradesmen use more than 
one sort of hammer. (There are claw hammers and ball peen hammers and 
tack hammers and wooden mallets and...)

"One obvious way to do it" should not mean "force everyone to use a tack 
hammer to drive in nails, because it's the only hammer in the tool box". 
It should mean "it's obvious, use the tack hammer to drive in tacks and 
the claw hammer for carpentry and the wooden mallet for beating out dints 
in sheet metal and..."


-- 
Steven.


From bdesth.quelquechose at free.quelquepart.fr  Sun Sep 23 11:48:40 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 23 Sep 2007 17:48:40 +0200
Subject: A question on python performance.
In-Reply-To: <mailman.1127.1190831666.2658.python-list@python.org>
References: <mailman.1127.1190831666.2658.python-list@python.org>
Message-ID: <46fabc70$0$26295$426a34cc@news.free.fr>

Joe Goldthwaite a ?crit :
> Hi everyone,
> 
> I'm a developer who's been using python for a couple of years.  I wrote a
> fairly large application using it but I was learning the language at the
> same time so it most of the code kind of sucks.
> 
> I've learned a lot since then and I've been going through my code trying to
> organize it better and make better use of Python's features.  I'm still  not
> an expert by any definition but I'm slowly getting better.
> 
> I've been working on a trend class that takes twelve monthly numbers and
> returns a period to date, quarter to date, year to date and quarterly year
> to date numbers for a specific period. This worked but I ended up with a lot
> of code like this;
> 
> def getValue(trend, param, per):
>    if param == 'Ptd':
>      return trend.Ptd(per)
>    elif param == 'Qtd':
>       return trend.Qtd(per)
>    elif param == 'Ytd':
>       return trend.Ytd(per)
>    elif param == 'YtdQ':
>       return trend.YtdQ(per)

The first obvious simplification is to replace this with:

def getValue(trend, param, per):
   meth = getattr(trend, param)
   return meth(per)

The main difference is that it will raise (instead of returning None) if 
param is not the name of a method of trend.

The second simplification is to either get rid of getValue()  (which is 
mostly useless).

> The code gets kind of wordy 

indeed

> so I started trying to figure out how to call
> them dynamically since the param type is the same as the method the
> retrieves it.  I came up with this;
> 
> def getValue(trend, param, per):
>    return trend.__class__.__dict__[param](trend, per)

Note that this is not strictly equivalent:
class Parent(object):
     def __init__(self, name):
         self.name = name
     def __repr__(self):
         return "<%s %s>" % (self.__class__.__name__, self.name)

     def dothis(self):
         return "parent.dothis %s" % self

class Child(Parent):
     def dothis(self):
         return "Child.dothis %s" % self

class OtherChild(Parent): pass

def dothat(obj):
     return "dothat %s" % obj

p = Parent('p')
c1 = Child('c1')
c2 = Child('c2')
c2.dothis = dothat.__get__(c2, type(c2))
o1 = OtherChild('o1');
o2 = OtherChild('o2');
o2.dothis = dothat.__get__(o2, type(o2))

for obj in p, c1, c2, o1, o2:
     print "obj : %s" % obj
     print "direct call :"
     print obj.dothis()
     print "via obj.__class__.__dict__ :"
     try:
         print obj.__class__.__dict__["dothis"](obj)
     except KeyError, e:
         print "oops - key error: %s" % e
     print

=>
obj : <Parent p>
direct call :
parent.dothis <Parent p>
via obj.__class__.__dict__ :
parent.dothis <Parent p>

obj : <Child c1>
direct call :
Child.dothis <Child c1>
via obj.__class__.__dict__ :
Child.dothis <Child c1>

obj : <Child c2>
direct call :
dothat <Child c2>
via obj.__class__.__dict__ :
Child.dothis <Child c2>

obj : <OtherChild o1>
direct call :
parent.dothis <OtherChild o1>
via obj.__class__.__dict__ :
oops - key error: 'dothis'

obj : <OtherChild o2>
direct call :
dothat <OtherChild o2>
via obj.__class__.__dict__ :
oops - key error: 'dothis'


IOW, direct access to obj.__class__.__dict__ bypasses both inheritence 
and per-instance overriding.

> That worked but it seems like the above line would have to do lots more
> object look ups at runtime so I didn't think it would be very efficient.  I
> thought maybe I could add a caller method to the trend class and I came up
> with this;
> 
> class trend:
>    ...
>    ...
>    ...
>    def caller(self, param, *args):
>       return self.__class__.__dict__[param](self, *args)
> 
> This simplified the getValue function to this;
> 
> def getValue(trend, param, per):
> 	return trend.caller(param, per)

Err... It actually means *more* lookup and function calls - and still 
fails to behave correctly wrt/ polymorphic dispatch.


From erik at myemma.com  Wed Sep 26 15:54:35 2007
From: erik at myemma.com (Erik Jones)
Date: Wed, 26 Sep 2007 14:54:35 -0500
Subject: A question on python performance.
In-Reply-To: <000a01c8006a$cac4af00$6c01a8c0@applexp>
References: <000a01c8006a$cac4af00$6c01a8c0@applexp>
Message-ID: <98EE1E46-9716-4D52-9396-C9CE431E2942@myemma.com>

On Sep 26, 2007, at 1:26 PM, Joe Goldthwaite wrote:

> Hi everyone,
>
> I'm a developer who's been using python for a couple of years.  I  
> wrote a
> fairly large application using it but I was learning the language  
> at the
> same time so it most of the code kind of sucks.
>
> I've learned a lot since then and I've been going through my code  
> trying to
> organize it better and make better use of Python's features.  I'm  
> still  not
> an expert by any definition but I'm slowly getting better.
>
> I've been working on a trend class that takes twelve monthly  
> numbers and
> returns a period to date, quarter to date, year to date and  
> quarterly year
> to date numbers for a specific period. This worked but I ended up  
> with a lot
> of code like this;
>
> def getValue(trend, param, per):
>    if param == 'Ptd':
>      return trend.Ptd(per)
>    elif param == 'Qtd':
>       return trend.Qtd(per)
>    elif param == 'Ytd':
>       return trend.Ytd(per)
>    elif param == 'YtdQ':
>       return trend.YtdQ(per)
>
> The code gets kind of wordy so I started trying to figure out how  
> to call
> them dynamically since the param type is the same as the method the
> retrieves it.  I came up with this;
>
> def getValue(trend, param, per):
>    return trend.__class__.__dict__[param](trend, per)
>
> That worked but it seems like the above line would have to do lots  
> more
> object look ups at runtime so I didn't think it would be very  
> efficient.  I
> thought maybe I could add a caller method to the trend class and I  
> came up
> with this;
>
> class trend:
>    ...
>    ...
>    ...
>    def caller(self, param, *args):
>       return self.__class__.__dict__[param](self, *args)
>
> This simplified the getValue function to this;
>
> def getValue(trend, param, per):
> 	return trend.caller(param, per)


What you're describing is a case of mulitple dispatch.  See http:// 
www.artima.com/weblogs/viewpost.jsp?thread=101605 for a short  
description and (as short) example by Guido.  You can probably fill  
that out and adapt it to your needs.  Alternatively, you could look  
into the multimethods module in the Gnosis Utilities package: http:// 
pypi.python.org/pypi/Gnosis_Utils/1.2.1-a


Erik Jones

Software Developer | Emma?
erik at myemma.com
800.595.4401 or 615.292.5888
615.292.0777 (fax)

Emma helps organizations everywhere communicate & market in style.
Visit us online at http://www.myemma.com




From vito.detullio at gmail.com  Tue Sep 25 14:36:21 2007
From: vito.detullio at gmail.com (ZeD)
Date: Tue, 25 Sep 2007 18:36:21 GMT
Subject: sorting a list numbers stored as strings
References: <mailman.1028.1190696259.2658.python-list@python.org>
	<13fi0na7rhfl90d@corp.supernews.com>
	<1190739321.755370.262290@57g2000hsv.googlegroups.com>
Message-ID: <FycKi.121101$%k.267260@twister2.libero.it>

thebjorn wrote:

>> >>> int("020")
>> 20
>> >>> 020
>> 16
> 
> You can get the latter behavior using eval:

why using eval when int has the "base" optional parameter?

>>> int("020")
20
>>> int("020", 8)
16
>>> int("09", 8)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: invalid literal for int() with base 8: '09'
>>>

-- 
Under construction


From no at spam.com  Thu Sep  6 19:25:55 2007
From: no at spam.com (Farshid Lashkari)
Date: Thu, 06 Sep 2007 16:25:55 -0700
Subject: Subclassing zipfile (new style class)
In-Reply-To: <H8KdnVfPDO28F33bnZ2dnUVZ_i2dnZ2d@comcast.com>
References: <H8KdnVfPDO28F33bnZ2dnUVZ_i2dnZ2d@comcast.com>
Message-ID: <V%%Di.129973$TW6.27857@newsfe06.phx>

Larry Bates wrote:
> import zipfile
> class walkZip(zipfile):
>     pass
> 
> 
> if __name__ == "__main__":
>     print "Hello World"
> 
> Traceback (most recent call last):
>   File "<string>", line 192, in run_nodebug
>   File "<module1>", line 2, in <module>
> TypeError: Error when calling the metaclass bases
>     module.__init__() takes at most 2 arguments (3 given)

In your code 'zipfile' is a module, not a class, so you cannot inherit 
from it. I believe this is what you are trying to accomplish:

class walkZip(zipfile.ZipFile):
     pass

-Farshid


From hniksic at xemacs.org  Wed Sep 26 18:23:59 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Thu, 27 Sep 2007 00:23:59 +0200
Subject: ~ bit-wise unary operator
References: <mailman.1138.1190844872.2658.python-list@python.org>
Message-ID: <87r6klm5fk.fsf@mulj.homelinux.net>

Ladislav Andel <ladaan at iptel.org> writes:

> Hello, why ~ bit-wise unary operator returns -(x+1) and not bit
> inversion of the given integer?

On 2s-complement architectures, -(x+1) *is* bit inversion of the given
integer.

> example:
> a = 7978
> a = ~a
> python returns -7979
>
> but I need to get back 57557 as in C language.

Python does exactly what C does in this case.

$ cat a.c
#include <stdio.h>
int main(void)
{
  int a = 7978;
  a = ~a;
  printf("%d\n", a);
  return 0;
}
$ gcc a.c
$ ./a.out
-7979

If you want 16-bit unsigned arithmetic, use 2**16 + ~a, which yields
57557.


From http  Fri Sep 28 14:16:15 2007
From: http (Paul Rubin)
Date: 28 Sep 2007 11:16:15 -0700
Subject: Python 3.0 migration plans?
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>
	<87641v4j38.fsf@benfinney.id.au>
	<1190949502.875203.57690@w3g2000hsg.googlegroups.com>
	<5m3p1dFbl98pU1@mid.uni-berlin.de>
	<1190968707.799398.232550@19g2000hsx.googlegroups.com>
	<5m4126FbgjabU1@mid.uni-berlin.de>
	<1190993122.979034.305060@50g2000hsm.googlegroups.com>
	<mailman.1236.1190995515.2658.python-list@python.org>
	<1190997769.002795.59450@57g2000hsv.googlegroups.com>
	<5m4qc2Fbbk19U1@mid.uni-berlin.de>
	<1191000394.828693.285210@k79g2000hse.googlegroups.com>
Message-ID: <7xhcle8xlc.fsf@ruckus.brouhaha.com>

TheFlyingDutchman <zzbbaadd at aol.com> writes:
> What is the syntax of a higher order function in C, C++ and Pascal?

  void qsort(int *array, int length, int width, int (*compare)());

is a C library example.  I think we'd describe qsort as a HOF since
one of its arguments (the comparison routine) is a function.  We
wouldn't say that C has first class functions like Python or Scheme
does, since you can't create new functions at runtime.


From ricaraoz at gmail.com  Sat Sep  1 17:56:38 2007
From: ricaraoz at gmail.com (=?ISO-8859-1?Q?Ricardo_Ar=E1oz?=)
Date: Sat, 01 Sep 2007 18:56:38 -0300
Subject: localizing a sort
Message-ID: <46D9E016.502@bigfoot.com>

Hi, I've been working on sorting out some words.

My locale is :
>>> import locale
>>> locale.getdefaultlocale()
('es_AR', 'cp1252')

I do :
>>> a = '???????????????'
>>> print ''.join(sorted(a, cmp=lambda x,y: locale.strcoll(x,y)))
aeiou???????????????

This is not what I am expecting. I was expecting :
a???e???i???.....etc.

The reason is that if you want to order some words (say for a dictionary
(paper dict, where you look up words)) this is what happens :
>>> a = 'pal?bra de p?labra de pblabra'
>>> print ' '.join(sorted(a.split(), cmp=lambda x,y: locale.strcoll(x, y)))
de de pal?bra pblabra p?labra

While any human being would expect :

de de pal?bra p?labra pblabra

Does anybody know a way in which I could get the desired output?

TIA






From jo5867472 at gmail.com  Thu Sep 13 14:37:43 2007
From: jo5867472 at gmail.com (jo5867472 at gmail.com)
Date: Thu, 13 Sep 2007 18:37:43 -0000
Subject: plotting pixels in python
In-Reply-To: <1189707751.846412.51420@r29g2000hsg.googlegroups.com>
References: <1189706620.564963.29690@d55g2000hsg.googlegroups.com>
	<1189707751.846412.51420@r29g2000hsg.googlegroups.com>
Message-ID: <1189708663.253748.323460@y42g2000hsy.googlegroups.com>

On Sep 13, 11:22 pm, Paul McGuire <pt... at austin.rr.com> wrote:
> On Sep 13, 1:03 pm, jo5867... at gmail.com wrote:
>
> > hi to all
> > I am just a beginner of python. I want to know how pixels are plotted
> > in python. I am not intending to use PIL because I don't need to
> > manipulate images. So is there a simple module for 2D graphics and
> > plot pixels
>
> Here is a *very* simple-minded module for creating BMP files, that
> supports drawing points, lines, and simple shapes.
>
> http://www.geocities.com/ptmcg/python/index.html#bmp
>
> -- Paul

No currently I am using a canvas from the Tkinter module
What I actually want is to show how a line is plotted pixel by pixel
using a delay loop. I want functions something like putpixel not
draw_line



From kyosohma at gmail.com  Thu Sep 27 15:25:48 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Thu, 27 Sep 2007 19:25:48 -0000
Subject: Launching command on windows
In-Reply-To: <1190908015.102664.323390@w3g2000hsg.googlegroups.com>
References: <1190899078.141370.116190@57g2000hsv.googlegroups.com>
	<1190902803.222738.52050@w3g2000hsg.googlegroups.com>
	<1190908015.102664.323390@w3g2000hsg.googlegroups.com>
Message-ID: <1190921148.668783.236970@k79g2000hse.googlegroups.com>

On Sep 27, 10:46 am, Alexandre Badez <alexandre.ba... at gmail.com>
wrote:
> On Sep 27, 4:20 pm, kyoso... at gmail.com wrote:
>
>
>
> > I got it to work using subprocess.Popen
>
> > Not sure why it doesn't work with os.system though.
>
> > Mike
>
> Thanks Mike and Mauro,
>
> Mauro, your solution do not seems to work (or I made a mistake..)
> Mike your solution work great, thanks.
> But, I steel think it's a bug (python or window ??).
> I will try to take a look about it, when I have time.
>
> Alex

Some of those spawn methods from the os module don't work on Windows
although that one doesn't seem to be one of the excluded:
http://docs.python.org/lib/os-process.html.

You should use subprocess regardless as the os.system and os.spawn*
calls are to be deprecated.

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

Replacing os.Popen* and os.spawn* calls with subprocess:
http://docs.python.org/lib/node534.html
http://docs.python.org/lib/node537.html

Mike



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun Sep 16 17:34:50 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 16 Sep 2007 23:34:50 +0200
Subject: Python "with"
References: <fck2di$7to$1@ss408.t-com.hr>
Message-ID: <5l5lrqF6j56dU1@mid.individual.net>

Ivan Voras wrote:
> I'm looking for a construct that's similar to (Turbo) Pascal's
> "with" statement. 

Please have a look at the archives -- this is discussed here from
time to time. I think last time it was a Visual BASIC fan that
asked a similar question.

> I know it can be almost always done by using a temporary variable:
> 
> tmp = some.big.structure.or.nested.objects.element
> tmp.member1 = something
> tmp.member2 = something
> 
> but this looks ugly to me.)

Such big, javaish names are much uglier, IMHO.

Regards,


Bj?rn

-- 
BOFH excuse #17:

fat electrons in the lines



From evan at yelp.com  Sun Sep 23 14:31:51 2007
From: evan at yelp.com (Evan Klitzke)
Date: Sun, 23 Sep 2007 11:31:51 -0700
Subject: Preemption in python
In-Reply-To: <9a4753250709221928s5768b15emecfd71a0f476cce@mail.gmail.com>
References: <9a4753250709221928s5768b15emecfd71a0f476cce@mail.gmail.com>
Message-ID: <1190572311.5703.4.camel@thinkpad>

On Sat, 2007-09-22 at 19:28 -0700, Kurtis Heimerl wrote:
> Hi, I'm developing my first python application, a multi-threaded cell
> phone gadget on ubuntu 7.10. I've just split off my first thread, and
> I've noticed something extremely strange: There doesn't seem to be any
> preemption. There are currently two threads, one that pings a storage
> service to see if there are messages available, and the other that
> runs the gtk windows. If I do not explicitly yield either one, it runs
> forever. I'm assuming this is a setting somewhere, but that's a very
> strange default behavior. 
> 
> How do I get this to go about preempting these threads? Any advice
> would be helpful. Thanks!

I'm far from an expert in threaded Python applications, but threading
ought to work out of the box. By default the Python interpreter will
switch threads every 100 bytecode instructions
(http://docs.python.org/api/threads.html).

Note that if you are synchronizing around a lock, you may need to sleep
before trying to reacquire the the lock to completely exit the critical
section. A good overview of this (and the Python threading model) can be
found at http://linuxgazette.net/107/pai.html

-- 
Evan Klitzke <evan at yelp.com>



From as at hut.at  Wed Sep 26 04:49:24 2007
From: as at hut.at (hyena)
Date: Wed, 26 Sep 2007 10:49:24 +0200
Subject: is there some module update(install tools)?
References: <8520e$46f83ee4$4df9f6c6$14843@news2.tudelft.nl>
	<13fglb5p4bo82c7@corp.supernews.com>
Message-ID: <22937$46fa2472$839b8704$17272@news2.tudelft.nl>

"Adonis Vargas" <adonisv at REMOVETHISearthlink.net> wrote in message 
news:13fglb5p4bo82c7 at corp.supernews.com...
> hyena wrote:
>> Hi,
>>
>>   I am quite new to python and am looking for some tools that can install 
>> and update modules a bit more intelligent then "python setup.py install". 
>> Is there some thing like "yum" in fedora which can search and 
>> install/update packages automatically?
>>
>> thanks in advance!
>
> setuptools is for you
> http://peak.telecommunity.com/DevCenter/setuptools
>
> Once installed, its easy as easy_install <module name>
>
> Hope this helps.
>
> Adonis Vargas

Thanks, going to take a look. 




From kskuhlman at gmail.com  Tue Sep 11 15:52:25 2007
From: kskuhlman at gmail.com (Ken Kuhlman)
Date: Tue, 11 Sep 2007 19:52:25 -0000
Subject: Best way to do attribute docstrings?
In-Reply-To: <mailman.262.1189214761.2658.python-list@python.org>
References: <1189195567.238990.54440@57g2000hsv.googlegroups.com>
	<mailman.262.1189214761.2658.python-list@python.org>
Message-ID: <1189540345.260656.115760@q5g2000prf.googlegroups.com>


Thanks for the response!  It was just the kick I needed to realize
that I was letting my frustration get the best of me and that I was
going down a dead-end.  I blame the fact that I was coding on little
sleep :-)

I went with the solution of giving a naming convention to the
docstrings and relying on that for the introspection -- that's a lot
less of a kludge than what I was attempting.

I still think it would be great if you could do something like:
@doc('Animal has four legs')
four_legs = True

IMHO, that syntax is nice (which was the objection to PEP 224), but
I'm not going to try to propose another PEP over it.  My itch is
scratched for now -- if the naming convention hack gets under my skin
eventually I'll try going down a source parsing route next.

Thanks again for the help!
-Ken

PS:  I hope it's OK that I ignored your questions -- my initial
solution was just too hideous to be scrutinized too closely.



From Scott.Daniels at Acm.Org  Wed Sep 19 21:30:53 2007
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Wed, 19 Sep 2007 18:30:53 -0700
Subject: super() doesn't get superclass
In-Reply-To: <87r6kwzg1h.fsf@benfinney.id.au>
References: <8764281uea.fsf@benfinney.id.au>
	<mailman.695.1190090570.2658.python-list@python.org>
	<87zlzkzgu2.fsf@benfinney.id.au>
	<1i4lvsx.mhw5621jlsd53N%aleax@mac.com>
	<87r6kwzg1h.fsf@benfinney.id.au>
Message-ID: <13f3j83lun4ckc5@corp.supernews.com>

Ben Finney wrote:
> aleax at mac.com (Alex Martelli) writes:
> 
>> In general, "a superclass of foo" means "a class X such that foo is a
>> sublass of X"
> 
> Sure. However, this doesn't equate to the assertion that "next class
> in the MRO is the superclass", which is what I was responding to.
> 
One thing not pointed out in this thread is that the chain of classes
on the MRO starting with super(A, obj) _will_ include all superclasses
of A.  That is the guarantee of the MRO, and that is why super is an
appropriate name.

-Scott David Daniels
Scott.Daniels at Acm.Org



From tmp-pythonlist at tschreiner.org  Wed Sep 19 08:17:30 2007
From: tmp-pythonlist at tschreiner.org (Thomas Schreiner)
Date: Wed, 19 Sep 2007 14:17:30 +0200
Subject: stdout and embedding into Windows apps
Message-ID: <46F1135A.3020301@tschreiner.org>

Hi,

I'm extending a windows application (C++) by embedding Python calls. It
seems to be a known problem that windows applications detach immediately
from the calling console, so that all output to stdout (from both C++
and Python) doesn't get shown anywhere.

A workaround seems to be the allocation of a windows console and
redirecting stdout to it:

   AllocConsole();
   freopen("conin$", "r", stdin);
   freopen("conout$", "w", stdout);
   freopen("conout$", "w", stderr);

Still, this console only shows the output of my C++ application, not the
output of the embedded python calls.

The following code
   Py_Initialize();
   std::cout << "start printing..." << std::endl;
   PyRun_SimpleString("print('PRINT')\n");
   std::cout << "done printing." << std::endl;

only prints

   start printing...
   done printing.

Does anybody know how to fix this issue? Basically I want to get an 
ipython console running in the background of my Windows app, so that I 
can process its data.


Cheers,


Thomas



From shao.tu at gmail.com  Wed Sep  5 05:39:42 2007
From: shao.tu at gmail.com (stalex)
Date: Wed, 05 Sep 2007 09:39:42 -0000
Subject: decorator and signal handler
Message-ID: <1188985182.617611.121740@r29g2000hsg.googlegroups.com>

Hi all,

I wrote the following code since I want to try using a decorator to
install signal handler:

## The test.py script
#################
import os
import time
import signal

def sigHandler(sid):
    def handler(f):
        signal.signal(sid, f)
        return f
    return handler

class Test(object):
    @sigHandler(signal.SIGTERM)
    def _sigHandler(self, signalId, currentFrame):
        print "Received:", signalId

if __name__ == "__main__":
    print "pid:", os.getpid()

    t = Test()
    time.sleep(300)

# From terminal, say A
####################
$ python test.py
pid: 1234

# From terminal, say B
###################
$ kill -TERM 1234

After issuing the kill command from terminal B, the process of test.py
from terminal A is terminated.
Python print out some exception message as following:
Traceback (most recent call last):
    File "a.py", line 22, in <module>
        time.sleep(300)
TypeError: _sigHandler() takes exactly 3 arguments (2 given)

At a guess, I think the decorator I defined did not pass the 'self' as
the first argument to _sigHandler() method, did it? And I have no idea
of how to write a correct one. Any suggestion?



From steve at REMOVE-THIS-cybersource.com.au  Fri Sep  7 21:10:44 2007
From: steve at REMOVE-THIS-cybersource.com.au (Steven D'Aprano)
Date: Sat, 08 Sep 2007 01:10:44 -0000
Subject: How to determine the bool between the strings and ints?
References: <mailman.227.1189179649.2658.python-list@python.org>
Message-ID: <13e3tkk62aj8h81@corp.supernews.com>

On Fri, 07 Sep 2007 17:40:44 +0200, Jorgen Bodde wrote:

> is the bool derived from 'int' in some way? 

Yes.

>>> issubclass(bool, int)
True


> What is the best way to
> check if the config I want to write is an int or a bool ?

if isinstance(value, bool):
    print "it's a bool, or a subclass of bool"
elif isinstance(value, int):
    print "it's an int, or a subclass of int other than bool"



-- 
Steven.


From bpowah at gmail.com  Sun Sep  9 09:39:49 2007
From: bpowah at gmail.com (bpowah)
Date: Sun, 09 Sep 2007 13:39:49 -0000
Subject: HDR and PIL
Message-ID: <1189345189.347973.77700@y42g2000hsy.googlegroups.com>

I've put together a method (and a script) for rendering (tone mapping)
an arbitrary number of exposures into an HDR-style image.   I really
like the results I'm getting and feel like others could benefit from
it.  I've put together a small write-up here (with the code):

http://bpowah.googlepages.com/hdrandpythonpil

I'd really like to hear comments, suggestions.  Improvements?  Was it
useful?   Should I do anything more with it?



From tjandacw at yahoo.com  Mon Sep 17 08:16:14 2007
From: tjandacw at yahoo.com (timw.google)
Date: Mon, 17 Sep 2007 05:16:14 -0700
Subject: how to join array of integers?
In-Reply-To: <1189859762.563599.269270@g4g2000hsf.googlegroups.com>
References: <1189859762.563599.269270@g4g2000hsf.googlegroups.com>
Message-ID: <1190031374.566560.312510@19g2000hsx.googlegroups.com>

On Sep 15, 8:36 am, Summercool <Summercooln... at gmail.com> wrote:
> i think in Ruby, if you have an array (or list) of integers
>
> foo = [1, 2, 3]
>
> you can use foo.join(",") to join them into a string "1,2,3"
>
> in Python... is the method to use  ",".join() ?  but then it must take
> a list of strings... not integers...
>
> any fast method?

Isn't the OP just looking for something like:

>>> foo=[1,2,3]
>>> bar=[4,5,6]
>>> foo+bar
[1, 2, 3, 4, 5, 6]
>>>



From kar1107 at gmail.com  Mon Sep 24 22:42:59 2007
From: kar1107 at gmail.com (Karthik Gurusamy)
Date: Tue, 25 Sep 2007 02:42:59 -0000
Subject: subprocess -popen - reading stdout from child - hangs
In-Reply-To: <1190668960.766658.235070@g4g2000hsf.googlegroups.com>
References: <1190518129.356844.242710@19g2000hsx.googlegroups.com>
	<1190530682.420121.31520@y42g2000hsy.googlegroups.com>
	<1190668960.766658.235070@g4g2000hsf.googlegroups.com>
Message-ID: <1190688179.963682.175310@r29g2000hsg.googlegroups.com>

On Sep 24, 2:22 pm, "gregpin... at gmail.com" <gregpin... at gmail.com>
wrote:
> On Sep 23, 2:58 am, Karthik Gurusamy <kar1... at gmail.com> wrote:
>
> > On Sep 22, 8:28 pm, "gregpin... at gmail.com" <gregpin... at gmail.com>
> > wrote:
>
> > > Let's say I have this Python file called loop.py:
>
> > > import sys
> > > print 'hi'
> > > sys.stdout.flush()
>
> > Add sys.stdout.close()
>
> Adding sys.stdout.close() and removing sys.stdout.flush() seems to
> make it work.  But can the while loop still use sys.stdout later on?
> Do I have to reopen it?

Once you close a file-object, you cannot use it. You'll get exception
if you try.
I quickly tried the fdopen on id 1 (stdout in unix like OS) and it
seems to work

>>> import sys
>>> sys.stdout.close()
>>> import os
>>> print 'hi'
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: I/O operation on closed file
>>> sys.stdout=os.fdopen(1, 'w')
>>> print 'hi'
hi
>>>

BUT you may want to re-think your design. Note that your caller
process will anyway stop reading  further from your loop.py process
the moment it sees the "first" EOF. So even if you enable loop.py to
generate more output (thru' the above fdopen), the caller process is
not going to see the newly generated data.

If your requirement is to collect all output from loop.py then you
can't do it if loop.py has an infinite loop across its data generation
points (ie it can generate data after the infinite loop -- which
anyway doesn't sense).

If all you want is not to get blocked, try one of the select solutions
or read a small amount at a time (which you can guarantee to be
available). Yet another solution would be you could set up an alarm
and get out of the blocking read if the alarm fires.

Karthik

>
> Thanks,
>
> Greg




From bjorn.kempen at gmail.com  Sat Sep 15 18:17:02 2007
From: bjorn.kempen at gmail.com (buffi)
Date: Sat, 15 Sep 2007 22:17:02 -0000
Subject: Needless copying in iterations?
In-Reply-To: <fchlff$ni4$1@daisy.noc.ucla.edu>
References: <fchk59$mm3$1@daisy.noc.ucla.edu>
	<1189893977.487320.231700@n39g2000hsh.googlegroups.com>
	<fchlff$ni4$1@daisy.noc.ucla.edu>
Message-ID: <1189894622.152271.72760@k79g2000hse.googlegroups.com>

On Sep 16, 12:20 am, James Stroud <jstr... at mbi.ucla.edu> wrote:
> buffi wrote:
> > On Sep 15, 11:58 pm, James Stroud <jstr... at mbi.ucla.edu> wrote:
> >> Hello all,
>
> >> I was staring at a segment of code that looked like this today:
>
> >>     for something in stuff[x:y]:
> >>       whatever(something)
>
> >> and was wondering if the compiler really made a copy of the slice from
> >> stuff as the code seems to suggest, or does it find some way to produce
> >> an iterator without the need to make a copy (if stuff is a built-in
> >> sequence type)? Or would it be more efficient to do the more clumsy (in
> >> my opinion):
>
> >>     for i in xrange(x, y):
> >>       whatever(stuff[i])
>
> >> James
>
> > itertools.islice does what you want
>
> > import itertools
> > for something in itertools.islice(stuff, x, y):
> >       whatever(something)
>
> Thanks buffi!
>
> So I guess the interpreter does no optimization in the latter?
>
> James

No, as far as I know it makes a new list out of the slice when you do
it like
for something in stuff[x:y]

- Bj?rn Kemp?n



From rcdailey at gmail.com  Mon Sep 24 22:38:16 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Mon, 24 Sep 2007 21:38:16 -0500
Subject: Confused about 'positive lookbehind assertion'
Message-ID: <496954360709241938k6baf1009gc7cab215ad16b12f@mail.gmail.com>

Hi,

I've been reading the python documentation on 'positive lookbehind
assertion' and I don't understand at all how it works. The python docs give
the following example:

"**(?<=abc)def will find a match in "abcdef", since the lookbehind will back
up 3 characters and check if the contained pattern matches."

Can anyone emphasize more on what this RE operation does? Thanks.
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From dmorilha at gmail.com  Sat Sep  1 18:01:37 2007
From: dmorilha at gmail.com (dmorilha)
Date: Sat, 01 Sep 2007 22:01:37 -0000
Subject: Paramiko performance doubts...
Message-ID: <1188684097.456561.140200@r34g2000hsd.googlegroups.com>

Hello all,

I developed a solution using paramiko and a similar Telnetlib class to
access a several number of network devices in replacement of using
Pexpect library and openssh client. It worked so well but the bad
performance made me think in how to improve Paramiko.

Is there some way to do that, for example using some C extension or
even other library? I would like to continue using Paramiko, but in
production environment it could be compiled in a different way. Is
this possible?

If someone could help me I would appreciate that,
Thanks,



From bj_666 at gmx.net  Sun Sep  2 13:18:16 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 2 Sep 2007 17:18:16 GMT
Subject: Pivy problem and some other stuff
References: <1188501707.593319.23330@m37g2000prh.googlegroups.com>
	<5jom54Fh543U2@mid.uni-berlin.de> <13df1kmak87mbb@corp.supernews.com>
	<1188743700.872880.21960@o80g2000hse.googlegroups.com>
Message-ID: <5k09ioF1j43jU1@mid.uni-berlin.de>

On Sun, 02 Sep 2007 14:35:00 +0000, Zentrader wrote:

> You can also use exec, but someone will tell you that the sky is going
> to fall if you do.  I am one of the ones who think that calling a
> function with
> results = [f() for f in funcs]
> doesn't "work" because it gives a meaningless error message that the
> calling line didn't work.

What meaningless error message are you talking about!?

Ciao,
	Marc 'BlackJack' Rintsch


From kostaspaxos at yahoo.gr  Sun Sep  9 16:48:33 2007
From: kostaspaxos at yahoo.gr (Konstantinos Pachopoulos)
Date: Sun, 09 Sep 2007 23:48:33 +0300
Subject: UnboundLocalError on global variable
Message-ID: <46E45C21.6070908@yahoo.gr>

Hi,
i have a problem, the source of which is probably the fact, that i have 
not understood how to declare global variables - I use the Jython
compiler, but i think this is a Python issue...

First of all, i don not use any classes in this module. The problem is, 
that i declare and instantiate some vars outside the functions (global
ones), but when i use them inside the functions, i get an 
"UnboundLocalError" error.

Here's the interesting part of the code:

==========================================================================================
#imports
...

#CONSTANTS
.....


...
#connection to DB
dbcursor_=db.cursor()

#GLOBAL VARS
entryList_={}
cmterID_=0          //VARIABLE DECLARATION
projID_=0
fileIDNumber_=0
Commiter_={}
Commit_={}
Project_={}        
ProjectVersion_={}
              

def updateCommiterTable(Commiter):
    query="INSERT INTO Commiter (pk_cmterID,cmterName) VALUES 
("+str(Commiter[0])+",\""+str(Commiter[1])+"\");"
    dbcursor_.execute(query)
 
 
def updateCommitTable(Commit):
    query="INSERT INTO Commit 
(pk_cmitID,cmitTime,fk_cmterID,cmitProperties,cmitComment,cmitCommentLines,fk_projID) 
VALUES (" \
             
+str(Commit[0])+",\""+str(Commit[1])+"\","+str(Commit[2])+",\""+str(Commit[3])+"\",\""+str(Commit[4])+"\","+str(Commit[5])+","+str(Commit[6])+");"
    dbcursor_.execute(query)
                
                
def updateProjectTable(Project):
  dbcursor_.execute("INSERT INTO Project 
(pk_projID,projName,projWebsite,projContactPoint,projSrcPath,projMailPath) 
VALUES (" \
                         
+str(Project[0])+",\""+str(Project[1])+"\",\""+str(Project[2])+"\",\""+str(Project[3])+"\",\""+str(Project[4])+"\",\""+str(Project[5])+"\");")


def updateProjectVersionTable(ProjectVersion):
  dbcursor_.execute("INSERT INTO ProjectVersion 
(pfk_projID,projName,projVersion) VALUES (" \
                          
+str(ProjectVersion[0])+",\""+str(ProjectVersion[1])+"\",\""+str(ProjectVersion[2])+"\");");



def getLogsLoop():
    
   while 
svnLogging_.getCurrentRevisionNumber()!=svnLogging_.getLatestRevisionNumber():       
 

     try:
        entryList_=svnLogging_.getNextLogs(PIVOT);
     except HeadRevisionReachedException:
        print "Attempting to go over the HEAD revision..."
            
     for entry in entryList_:
        print "processing new SVN entry..."
        processLogEntry(entry)

     entryList_.clear()            
            

def processLogEntry(entry):


   revision = int(entry.getRevision())
   commiter = str(entry.getAuthor())  
   datetime = getTimeStamp(entry.getDate())
   message = str(entry.getMessage())        
        
   Commiter_[0] = cmterID_ //HERE's THE PROBLEM
   Commiter_[1] = commiter
   updateCommiterTable(Commiter_)
        
    
   Commit_[0] = revision    
   Commit_[1] = datetime    
   Commit_[2] = cmterID_
   Commit_[3] = "" #properties
   Commit_[4] = message     
   Commit_[5] = getNumberOfLines(message)
   Commit_[6] = projID_
   updateCommitTable(Commit_)

   ProjectVersion_[0]=projID_
   ProjectVersion_[1]=""
   ProjectVersion_[2]=""
   updateProjectVersionTable(ProjectVersion_)
        
   Project_[0]=projID_
   Project_[1]=""
   Project_[2]=""
   Project_[3]=""
   Project_[4]=""             
   Project_[5]=""                
   updateProjectTable(Project_)                                      
            
   cmterID_+=1            
   projID_+1
    
##############################HELPER##METHODS###############################   
 
...        
##############################HELPER##METHODS###############################   
 

getLogsLoop()
==========================================================================================


And I get:
==========================================================================================
Traceback (innermost last):
  File "ParseSVN2DB.py", line 182, in ?
  File "ParseSVN2DB.py", line 87, in getLogsLoop
  File "ParseSVN2DB.py", line 100, in processLogEntry
UnboundLocalError: local: 'cmterID_'
==========================================================================================

The things is, that cmterID_ HAS BEEN instantiated... I don't understand.
Can somebody please explain?


From evan at yelp.com  Mon Sep  3 02:07:06 2007
From: evan at yelp.com (Evan Klitzke)
Date: Sun, 02 Sep 2007 23:07:06 -0700
Subject: Will Python 3.0 remove the global interpreter lock (GIL)
In-Reply-To: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
References: <1188778898.007988.231180@d55g2000hsg.googlegroups.com>
Message-ID: <1188799626.5588.5.camel@thinkpad>

On Sun, 2007-09-02 at 17:21 -0700, llothar wrote:
> I'm afraid that the GIL is killing the usefullness of python for some
> types of applications now where 4,8 oder 64 threads on a chip are here
> or comming soon.
> 
> What is the status about that for the future of python?

The GIL is an implementation specific issue with CPython. It will not be
removed in CPython for the forseeable future, but you can already get a
GIL-free interpreter with Jython and IronPython. AFAIK there are plans
to remove the GIL in PyPy.

According to the last PyPy release announcement, they're running at
about half the speed of CPython, and have a preliminary JIT that can
translate certain integer operations into assembly, and will be expanded
upon in future releases. If you're looking for a progressive alternative
to CPython, I'd keep an eye on that project ;-)

-- 
Evan Klitzke <evan at yelp.com>



From wizzardx at gmail.com  Sun Sep 23 05:16:50 2007
From: wizzardx at gmail.com (David)
Date: Sun, 23 Sep 2007 11:16:50 +0200
Subject: Factory function with keyword arguments
In-Reply-To: <46F62A11.7010002@ronadam.com>
References: <13fbl9ertj5es12@corp.supernews.com> <46F62A11.7010002@ronadam.com>
Message-ID: <18c1e6480709230216g78821fdif7e70d42b0307d58@mail.gmail.com>

On 9/23/07, Ron Adam <rrr at ronadam.com> wrote:
>
>
> Steven D'Aprano wrote:
> > I'm writing a factory function that needs to use keywords in the produced
> > function, not the factory. Here's a toy example:
>

http://docs.python.org/whatsnew/pep-309.html


From me at rpatterson.net  Fri Sep 21 13:44:30 2007
From: me at rpatterson.net (Ross Patterson)
Date: Fri, 21 Sep 2007 10:44:30 -0700
Subject: Zope review
References: <1190331847.514475.284200@22g2000hsm.googlegroups.com>
	<46f37471$0$16854$426a74cc@news.free.fr>
Message-ID: <871wcryku9.fsf@superfluity.lefae.org>

Bruno Desthuilliers <bruno.42.desthuilliers at wtf.websiteburo.oops.com>
writes:

> Norm a ?crit :
>> Hi,
>> 
>> without meaning to start a flame war between the various python web
>> tools, I was wondering if anyone had a review of the status of Zope.
>> For example, is it being used for new projects or just maintenance?
>> 
>> I really like the look of Zope 3, and the interface/schema pattern for
>> defining objects looks very useful - but if the general feeling is to
>> use a different tool since Zope 3 isn't being used in the community
>> then I would prefer to start with that as I get to grips with Python
>> again.
>
> Zope is kinda of a world by itself, and it's often considered as not 
> very pythonic. FWIW, it has it's own community.
>
> As far as I'm concerned, having working experience with Zope2, I'd say 
> that Zope3 is certainly an interesting evolution, but absolutely not the 
> kind of framework I'm after. My bet is that Pylons is the next big thing.

One of the goals behind Zope 3 has been to remedy the "world by itself"
problem in Zope 2 and thus Zope 3 is much more Pythonic and plays nicely
with others in the Python world such as Paste, WSGI, etc..

If you're interested in trying out Zope 3, check out grok
(http://grok.zope.org/).  Grok does the job of making the Zope 3
learning curve as gradual as Python such that you only need to learn
enough to do what you're trying to do at the moment.

Ross



From paul.hankin at gmail.com  Wed Sep 19 12:59:44 2007
From: paul.hankin at gmail.com (paulhankin)
Date: Wed, 19 Sep 2007 16:59:44 -0000
Subject: Why is this loop heavy code so slow in Python? Possible Project
	Euler spoilers
In-Reply-To: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
References: <1188733902.513512.87510@r34g2000hsd.googlegroups.com>
Message-ID: <1190221184.633997.43670@y42g2000hsy.googlegroups.com>

On Sep 2, 12:51 pm, jwrweather... at gmail.com wrote:
> ... right-angled triangle puzzle solver
>
> max = 0
> maxIndex = 0
> index = 0
> for solution in solutions:
>     if solution > max:
>         max = solution
>         maxIndex = index
>     index += 1
>
> print maxIndex

Not that it solves your slowness problem, or has anything to
do with the question you asked :), but you can replace this
last segment of your code with:

print solutions.index(max(solutions))

--
Paul Hankin



From gagsl-py2 at yahoo.com.ar  Fri Sep 21 03:25:53 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 21 Sep 2007 04:25:53 -0300
Subject: Sets in Python
References: <1190162387.396681.250190@n39g2000hsh.googlegroups.com>
	<CeB*qHeVr@news.chiark.greenend.org.uk>
	<1190235483.412972.81280@v23g2000prn.googlegroups.com>
	<13f3m15igkstq2e@corp.supernews.com>
	<1190260923.243865.312190@z24g2000prh.googlegroups.com>
	<13f4nclh902f78f@corp.supernews.com>
Message-ID: <op.tyztlff4x6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 20 Sep 2007 08:46:29 -0300, Steven D'Aprano  
<steve at REMOVE-THIS-cybersource.com.au> escribi?:

> Another way is to use this class:
>
> class HashableList(list):
>     def __hash__(self):
>         return hash(tuple(self))

...and that will stop working as soon as the list is mutated (which is  
exactly what you said before)

-- 
Gabriel Genellina



From lew at lewscanon.com  Tue Sep 11 09:58:38 2007
From: lew at lewscanon.com (Lew)
Date: Tue, 11 Sep 2007 09:58:38 -0400
Subject: Car-ac-systems
In-Reply-To: <BeqdnaFrktIgBHvbnZ2dnUVZ8v-dnZ2d@eclipse.net.uk>
References: <1189511932.371621.112970@o80g2000hse.googlegroups.com>
	<BeqdnaFrktIgBHvbnZ2dnUVZ8v-dnZ2d@eclipse.net.uk>
Message-ID: <YaadnYyTWsmTAnvbnZ2dnUVZ_iydnZ2d@comcast.com>

John Timney (MVP) wrote:
> How do I control one with C# then!  Thats not on your site, clearly not 
> everything I need to know then.  Waste of a site!

Please do not top post.

> "knjaz" <knjaz0 at gmail.com> wrote in message 
>> Here you can find everything you need to know about car air
>> conditioning
>>
>> http://car-ac-systems.blogspot.spam/

I'm starting to see "blogspot" as a synonym for "spam".

-- 
Lew


From righes at arcor.de  Sat Sep 29 14:04:39 2007
From: righes at arcor.de (righes at arcor.de)
Date: Sat, 29 Sep 2007 11:04:39 -0700
Subject: strange unbound local error?
Message-ID: <1191089079.818739.245820@22g2000hsm.googlegroups.com>

hi folks,

suppose this snipplet:

spam = 42

def eggs():
    print spam
    spam = spam + 1

if __name__=="__main__":
    eggs()

This thows an UnboundLocalError at line 4 (print statement). But if I
comment out line 5 (variable assignment), no error occurs.

Can you explain me this, please?

Regards,
Enrico



From david at boddie.org.uk  Wed Sep 26 10:55:40 2007
From: david at boddie.org.uk (David Boddie)
Date: Wed, 26 Sep 2007 16:55:40 +0200
Subject: Script to extract text from PDF files
Message-ID: <200709261655.40530.david@boddie.org.uk>

On Wed Sep 26 15:06:54 CEST 2007, byte8bits wrote:

> On Sep 25, 10:19 pm, Lawrence D'Oliveiro <l... at geek-
> central.gen.new_zealand> wrote:
> 
> > This is inherent in the nature of PDF: it's a page-description language,
> > not a document-interchange language. Each text-drawing command can put a
> > block of text anywhere on the page, so you have no idea, just from
> > parsing the PDF content, how to join these blocks up into lines,
> > paragraphs, columns etc.
> 
> So (I'm not being a wise guy) how does pdftotext do it so well?

There's a little information on that online:

  http://www.glyphandcog.com/textext.html

You would need to look at the source code to see exactly what it does.

> The text I can extract from PDFs is extracted as it appears in the doc.
> Although there are various ways to insert and encode text in PDFs,
> it's also well documented in the PDF specifications (http://
> www.adobe.com/devnet/pdf/pdf_reference.html).

Just because inserting and encoding is well documented doesn't mean that the
reverse processes are easy. :-/

> Going back to pdftotext... it works well at extracting text from PDF.
> I'd like a native Python library that does the same.

Maybe you should look at the source code for pdftotext, if that's an option.

> This can be done. 
> And, it can be done in Python. I've made a small start, my hope was that
> others would be interested in helping, but I can do it on my own
> too... it'll just take a lot longer :)

Can I suggest that you approach one or more authors of the existing Python
PDF solutions and work with them on this? There are at least four PDF parsers
written in Python out there.

David


From attn.steven.kuo at gmail.com  Mon Sep 10 11:15:19 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: Mon, 10 Sep 2007 15:15:19 -0000
Subject: How can I test 'warnings' from testsuite?
In-Reply-To: <1189433313.296787.166060@22g2000hsm.googlegroups.com>
References: <1189433313.296787.166060@22g2000hsm.googlegroups.com>
Message-ID: <1189437319.084730.12300@k79g2000hse.googlegroups.com>

On Sep 10, 7:08 am, billiejoex <gne... at gmail.com> wrote:
> Hi there,
> into a module of mine I 'warn' a message if a certain situation
> occurs:
>
> def add_anonymous_user(permissions=('r'):
>       if 'w' in p:
>           import warnings
>           warnings.warn("it's not rencommended assigning 'w'
> permission to anonymous user.", RuntimeWarning, stacklevel=2)
>
> I'd like to test such event from test suite ("fail test if warn is not
> raised") but don't know how.
>
> Any suggestion?



You can (temporarily) change warnings to exceptions
for the purposes of testing; see filterwarnings in
the warnings module.  E.g.,

import warnings
import unittest

def foo():
    warnings.warn("Foo", RuntimeWarning, stacklevel=2)

class testWarn(unittest.TestCase):
    def setUp(self):
        warnings.filterwarnings("error")
    def test_1(self):
        self.assertRaises(RuntimeWarning, foo)
    def tearDown(self):
        warnings.resetwarnings()

s = unittest.TestSuite()
s.addTest(unittest.makeSuite(testWarn))

if __name__ == '__main__':
    import sys
    sys.argv.append('-v')
    unittest.TextTestRunner(verbosity=2).run(s)


--
Hope this helps,
Steven



From giovanni.porcari at gmail.com  Thu Sep 13 02:48:15 2007
From: giovanni.porcari at gmail.com (genro)
Date: Wed, 12 Sep 2007 23:48:15 -0700
Subject: newbie: self.member syntax seems /really/ annoying
In-Reply-To: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
References: <1189592518.040116.76370@g4g2000hsf.googlegroups.com>
Message-ID: <1189666095.727426.135170@o80g2000hse.googlegroups.com>

On Sep 12, 6:21 am, Charles Fox <charles.... at gmail.com> wrote:
> I've just started playing around with Python, as a possible
> replacement for a mix of C++, Matlab and Lisp.  The language looks
> lovely and clean with one huge exception:  I do a lot of numerical
> modeling, so I deal with objects (like neurons) described
> mathematically in papers, by equations like
>     a_dot = -k(a-u)
> In other languages, this translates nicely into code, but as far as I
> can tell, Python needs the ugly:
>     self.a_dot = -self.k(self.a-self.u)
> For large equations this is going to make my code seriously unreadable
> to the point of needing to switch back to Matlab -- and it seems to go
> against everything else about python's simplicity and elegance.  Am I
> missing something?  Is there something like a 'with' command that lets
> me set the scope, like
>
>     with self:
>       .a_dot = -.k(.a-.u)
>
> It's premature to make language suggestions as I am new to the
> language, but I would have though that making a 'with self' explicit
> in all methods would have been neat, so I could just write
>       .a_dot = -.k(.a-.u)
> which would still avoid confusion with local function variables, since
> '.a' is different from 'a'.
>
> Please help if I am missing something -- this looks like a great
> language but I am going to mad trying to read numerical code full of
> 'self.'s breaking up the equations.

Just an idea: I think that if you have to get a more readable code
you
could abstract the function from the object using a significative
name and then use this named function passing **self.__dict__

For example in your module you could write:

#------ functional section -----------


def dothis(k,a,u):
    return k*(a-u)

def dothat(m,r,k):
    return m*r+(k.m)^m


#----- Class definition ------

class Bar(object):

    def foo(self):
        self.a_dot = dothis(**self.__dict__)
        self.boo = dothat(**self.__dict__)

In this way the functional part is pure expression and very readable.


HTH

G.



From tjandacw at yahoo.com  Mon Sep 17 12:14:10 2007
From: tjandacw at yahoo.com (timw.google)
Date: Mon, 17 Sep 2007 09:14:10 -0700
Subject: how to join array of integers?
In-Reply-To: <1190033199.800006.288530@y42g2000hsy.googlegroups.com>
References: <1189859762.563599.269270@g4g2000hsf.googlegroups.com>
	<1190031374.566560.312510@19g2000hsx.googlegroups.com>
	<1190033199.800006.288530@y42g2000hsy.googlegroups.com>
Message-ID: <1190045650.108142.281470@d55g2000hsg.googlegroups.com>

On Sep 17, 8:46 am, John Machin <sjmac... at lexicon.net> wrote:
> On Sep 17, 10:16 pm, "timw.google" <tjand... at yahoo.com> wrote:
>
>
>
>
>
> > On Sep 15, 8:36 am, Summercool <Summercooln... at gmail.com> wrote:
>
> > > i think in Ruby, if you have an array (or list) of integers
>
> > > foo = [1, 2, 3]
>
> > > you can use foo.join(",") to join them into a string "1,2,3"
>
> > > in Python... is the method to use  ",".join() ?  but then it must take
> > > a list of strings... not integers...
>
> > > any fast method?
>
> > Isn't the OP just looking for something like:
>
> > >>> foo=[1,2,3]
> > >>> bar=[4,5,6]
> > >>> foo+bar
> > [1, 2, 3, 4, 5, 6]
>
> No. Read what he wrote. He has a SINGLE list whose elements are (e.g.)
> integers [1, 2, 3], *NOT* two lists. He wants to create a STRING
> "1,2,3", not a list.- Hide quoted text -
>
> - Show quoted text -

You're right. I read it wrong. Sorry.



From staris28 at gmail.com  Fri Sep  7 05:19:25 2007
From: staris28 at gmail.com (pradeep kumar)
Date: Fri, 7 Sep 2007 11:19:25 +0200
Subject: How to convert None to null value
Message-ID: <eb3f41b30709070219h1b32aacj8f6daac23cd02807@mail.gmail.com>

Hi ,

i am trying to insert records from one table to another table in postgres
sql using the the following code

posConn.query("insert into
usr(usr_id,usr_name,usr_passwd,grp_cde,usr_type,usr_chk_till_val, \

usr_active,usr_daily_auth,usr_lst_login,usr_lst_logout,usr_shift_id,usr_role_level)
values \
             ('%s','%s','%s',%s,%i,%d,'%s',%i,%i,%i,%i,%i)"
%(row[0],row[1],row[2],row[3],row[4],row[5], \
              row[7],row[8],row[10],row[11],row[12],row[14]) )

here row[4] column is having null value so python consides it as None but
will insert into the table it inserts as None not null value

please help how to convert None to null value
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From stefan.behnel-n05pAM at web.de  Wed Sep 19 03:53:43 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Wed, 19 Sep 2007 09:53:43 +0200
Subject: Extracting xml from html
In-Reply-To: <1190149887.079874.28060@n39g2000hsh.googlegroups.com>
References: <1190061079.025479.129070@w3g2000hsg.googlegroups.com>
	<mailman.676.1190065903.2658.python-list@python.org>
	<1190143908.594470.244440@y42g2000hsy.googlegroups.com>
	<1190149887.079874.28060@n39g2000hsh.googlegroups.com>
Message-ID: <46F0D587.6050906@web.de>

George Sakkis wrote:
> Given that you can do in 2 lines what
> took you around 15 with lxml, I wouldn't think it twice.

Don't judge a tool by beginner's code.

Stefan


From stefan.behnel-n05pAM at web.de  Mon Sep 24 08:08:20 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Mon, 24 Sep 2007 14:08:20 +0200
Subject: rules from an xml file
In-Reply-To: <1190633685.275142.264540@r29g2000hsg.googlegroups.com>
References: <1190633685.275142.264540@r29g2000hsg.googlegroups.com>
Message-ID: <46F7A8B4.2030803@web.de>

jonny wrote:
> I have a python code that manages some parameters using some variable
> rules that may change from day to day. I'd like that the code will
> self-modify according to rules parsed from a xml file:
> 
> example:
> 
> <rules>
>    <rule01>
>       <if>
> 		<or>
> 			<lessthan par_1="glicemyAtMorning" par_2="80"/>
> 			<lessthan par_1="glicemyAtNight" par_2="80"/>
> 			<and>
> 				<greaterthan par_1="glicemyAtMorning" par_2="0"/>
> 				<or>
> 					<equalto par_1="urine" par_2="0"/>
> 					<equalto par_1="urine" par_2="+/-"/>
> 					<equalto par_1="urine" par_2="+"/>
> 				</or>
> 			</and>
> 		</or>
> 	</if>
>         <then>
>            <sendmessage>Something is wrong!</sendmessage>
>         </then>
>    </rule01>
>    <rule02> ...  </rule02>
>    <rule03> ...   </rule03>
> </rules>
> 
> Due to the fact that rules may change, I have to manage the python
> program, parsing the whole xml file, and self-modify the python code
> according to these variable rules.
> How can I do?

A beautiful solution could be to implement a namespace for these elements in
lxml.etree (even if it's not an XML namespace with a URI). You would give each
of the elements its own subclass of lxml.etree.BaseElement, maybe split into
rule elements and expression elements, and then give each of them an
evaluate() method that returns the result of the evaluation, such as

    def evaluate(self):
        for child in self:
            if child.evaluate():
                return True
        return False

for the "or" element or

    def evaluate(self):
        if self[0].evaluate():
            return self.getnext().evaluate()
        else:
            return self.getnext().getnext().evaluate()

for an "if-then-else" statement as in your example above (plus special casing
if "then" or "else" are not there).

Then you define a mapping from the tag names to your element classes and let
lxml.etree instantiate the decision tree for you.

Here is the documentation on this feature:
http://codespeak.net/lxml/dev/element_classes.html
http://codespeak.net/lxml/dev/element_classes.html#id1

Especially these two class lookup schemes might be handy:
http://codespeak.net/lxml/dev/element_classes.html#custom-element-class-lookup
http://codespeak.net/lxml/dev/element_classes.html#namespace-class-lookup

And here is an example:
http://codespeak.net/svn/lxml/trunk/src/lxml/html/__init__.py

Have fun,
Stefan


From hniksic at xemacs.org  Thu Sep 27 15:55:37 2007
From: hniksic at xemacs.org (Hrvoje Niksic)
Date: Thu, 27 Sep 2007 21:55:37 +0200
Subject: Cross-platform time out decorator
References: <1190802115.585306.250400@o80g2000hse.googlegroups.com>
	<1190899882.702911.44670@w3g2000hsg.googlegroups.com>
	<87k5qc18gf.fsf@mulj.homelinux.net>
	<1190907553.425261.273400@w3g2000hsg.googlegroups.com>
Message-ID: <87ejgjnarq.fsf@mulj.homelinux.net>

Joel <joel.schaerer at gmail.com> writes:

>> Note that, unlike the original alarm code, it doesn't really interrupt
>> the timed-out method, it just returns the control back to the caller,
>> using an exception to mark that a timeout occurred.  The "timed out"
>> code is still merrily running in the background.  I don't know if it's
>> a problem in your case, but it's an important drawback.
>
> There should be a method to stop the thread though?

Not in Python.  Thread killing primitives differ between systems and
are unsafe in general, so they're not exposed to the interpreter.  On
Windows you can attempt to use ctypes to get to TerminateThread, but
you'll need to hack at an uncomfortably low level and be prepared to
deal with the consequences, such as memory leaks.  If the timeouts
happen rarely and the code isn't under your control (so you have no
recourse but to terminate the thread), it might be worth it though.


From tdelaney at avaya.com  Mon Sep 17 04:30:00 2007
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Mon, 17 Sep 2007 16:30:00 +0800
Subject: Python 3K or Python 2.9?
In-Reply-To: <87ir6f5mrq.fsf@benfinney.id.au>
Message-ID: <E4C7BCAB1872014F81CEAACD25699B8C08495B@301081ANEX2.global.avaya.com>

Ben Finney wrote:

> The latter two statements are equivalent. The 'instance.method(args)'
> syntax is just sugar for 'Class.method(instance, args)'.

Only in the case that "instance" is an instance of "Class", and not an
instance of a subclass of "Class". For example, the following are not
equivalent:

class A(object):
    def func(self):
        print 'A'

class B(A):
    def func(self):
        super(B, self).func()
        print 'B'

a = A()
b = B()

A.func(a)
A.func(b)
B.func(b)
a.func()
b.func()

Tim Delaney


From rcdailey at gmail.com  Wed Sep 26 11:50:37 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Wed, 26 Sep 2007 10:50:37 -0500
Subject: Missing documentation for ElementTree?
In-Reply-To: <1190783252.777675.44180@r29g2000hsg.googlegroups.com>
References: <496954360709251539y2511a1cbnd25c6d3a0d368d2a@mail.gmail.com>
	<mailman.1080.1190779234.2658.python-list@python.org>
	<1190783252.777675.44180@r29g2000hsg.googlegroups.com>
Message-ID: <496954360709260850u3aed1bc3n56f92726c0c542de@mail.gmail.com>

This is the documentation for 3.0a1? This is exactly what I was looking for.
Thank you.

@Gabriel
Your documentation is also useful, it never occurred to me to check the
ElementTree website for documentation. Since it came with Python I expected
it to be covered by the python documentation. Thanks.

On 9/26/07, timaranz at gmail.com <timaranz at gmail.com> wrote:
>
> On Sep 26, 4:00 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
> > En Tue, 25 Sep 2007 19:39:33 -0300, Robert Dailey <rcdai... at gmail.com>
> > escribi?:
> >
> > > for the _ElementInterface class, there is no documentation for most of
> > > the
> > > members of this class such as .tail and .text. There's a brief
> > > description
> > > of these things on the front page of the ElementTree docs but nothing
> > > helpful. I have no idea what Tail is vs Text and I wanted to figure
> this
> > > out
> > > myself, however I don't think I can now. Anyone know if I'm just
> missing
> > > something in the documentation or if it really isn't in there?
> >
> > Start here:http://www.effbot.org/zone/element-index.htm
> >
> > --
> > Gabriel Genellina
>
> Check out the development version of the documentation
>
> http://docs.python.org/dev/library/xml.etree.elementtree.html#module-xml.etree.ElementTree
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From ricardo.turpino at gmail.com  Mon Sep 10 16:15:05 2007
From: ricardo.turpino at gmail.com (ricardo.turpino at gmail.com)
Date: Mon, 10 Sep 2007 13:15:05 -0700
Subject: Mac OSX sqlite problem.  Missing?
Message-ID: <1189455305.994439.107100@r34g2000hsd.googlegroups.com>

Hi,

I've installed Mac Python 2.5.  I'm running Mac OS X 10.4.10 on a
Macbook 1.83GHz.  I though that the python sqlite library was
installed by default as part of Mac Python 2.5, however, I still have
a problem.

Sqlite does not appear to be my system:

>>> import sqlite
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named sqlite

I ran 'sudo easy_install pysqlite' which gave me the file
'pysqlite-2.3.5-py2.5-macosx-10.3-fat.egg', but no working pysqlite.

I then downloaded the source files and ran 'python ez_setup.py
pysqlite==2.3.5', which told me 'Using /Library/Frameworks/
Python.framework/Versions/2.5/lib/python2.5/site-packages/
pysqlite-2.3.5-py2.5-macosx-10.3-fat.egg'

Still no working version of pysqlite.

Tried installing from source.  No problems appeared, but I still can't
use pysqlite.

The reason I am trying to install pysqlite, is to use turbogears,
which initially failed when I ran 'tg-admin sql create', it failed
with 'import sqlite.  ImportError: No module named sqlite'.

Any ideas gratefully received.

Thanks.



From aleax at mac.com  Sun Sep  2 12:55:30 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 2 Sep 2007 09:55:30 -0700
Subject: localizing a sort
References: <mailman.283.1188683800.28954.python-list@python.org>
	<fbdv47$jcm$03$1@news.t-online.com>
	<mailman.293.1188746375.28954.python-list@python.org>
Message-ID: <1i3t4p6.12j3kffgcfjoN%aleax@mac.com>

Ricardo Ar?oz <ricaraoz at gmail.com> wrote:
> Peter Otten wrote:
   ...
> >>>>> print ''.join(sorted(a, cmp=lambda x,y: locale.strcoll(x,y)))
> >> aeiou???????????????
> > 
> > The lambda is superfluous. Just write cmp=locale.strcoll instead.
> 
> No it is not :
> >>> print ''.join(sorted(a, cmp=locale.strcoll(x,y)))
> Traceback (most recent call last):
>   File "<input>", line 1, in <module>
> TypeError: strcoll expected 2 arguments, got 0
> 
> You need the lambda to assign both arguments.

No, your mistake is that you're CALLING locale.strcoll, while as Peter
suggested you should just PASS it as the cmp argument.  I.e.,

    ''.join(sorted('ciao', cmp=locale.strcoll))

Using key=locale.strxfrm should be faster (at least when you're sorting
long-enough lists of strings), which is why strxfrm (and key=...:-)
exist in the first place, but cmp=locale.strcoll, while usually slower,
is entirely correct.  That lambda _IS_ superfluous, as Peter said.


Alex


From kyosohma at gmail.com  Fri Sep 28 13:22:08 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: Fri, 28 Sep 2007 17:22:08 -0000
Subject: OCBC connection
In-Reply-To: <mailman.1228.1190992159.2658.python-list@python.org>
References: <mailman.1228.1190992159.2658.python-list@python.org>
Message-ID: <1191000128.112881.111790@r29g2000hsg.googlegroups.com>

On Sep 28, 9:57 am, "Sugrue, Sean" <Sean.Sug... at analog.com> wrote:
> I'm trying to make an odbc connection to postgresql which is on a server
> using python.
> Does anyone have a code snippet to make a basic connection with a select
> query?
>
> Sean

Sean,

This appears to be what you're looking for:

http://www.devx.com/opensource/Article/29071

See also Python Database spec and module page:

http://www.python.org/topics/database/

Mike



From llothar at web.de  Sat Sep  1 06:38:58 2007
From: llothar at web.de (llothar)
Date: Sat, 01 Sep 2007 03:38:58 -0700
Subject: How to find out if the interpreter is a debug build?
In-Reply-To: <fbamlq$r7q$6@lust.ihug.co.nz>
References: <1188609417.273513.74450@i13g2000prf.googlegroups.com>
	<fbamlq$r7q$6@lust.ihug.co.nz>
Message-ID: <1188643138.407513.202200@k79g2000hse.googlegroups.com>

On 1 Sep., 10:37, Lawrence D'Oliveiro <l... at geek-
central.gen.new_zealand> wrote:
> In message <1188609417.273513.74... at i13g2000prf.googlegroups.com>, llothar
> wrote:
>
> > How can i find out if a selected python interpreter  (i only know the
> > path name under which i should start it) is a debug build?
>
> What's the difference in their behaviour?

Total different and total incompatible behaviour if you write
an IDE (Debugger/Profiler etc.)

And total different for binary extensions.



From ahmad at baitalmal.com  Thu Sep 20 13:41:50 2007
From: ahmad at baitalmal.com (=?UTF-8?Q?Ahmad_=E3=8B=A1_Baitalmal?=)
Date: Thu, 20 Sep 2007 10:41:50 -0700
Subject: python-mcrypt install on Mac OSX
In-Reply-To: <5legsqF7k809U1@mid.uni-berlin.de>
References: <mailman.787.1190248902.2658.python-list@python.org>
	<5legsqF7k809U1@mid.uni-berlin.de>
Message-ID: <043BDB87-EE63-420B-B600-618724674C44@baitalmal.com>

On Sep 19, 2007, at 11:04 PM, Diez B. Roggisch wrote:

> Ahmad ? Baitalmal schrieb:
>> Hi,
>> I'm having a hard time getting python-mcrypt extension to build.
>> I installed libmcrypt with --prefix=/usr and I checked that the  
>> library
>> exists
>>
>> -rwxr-xr-x   1 root  wheel    352K Sep 19 16:53
>> /usr/lib/libmcrypt.4.4.8.dylib*
>> lrwxr-xr-x   1 root  wheel     21B Sep 19 16:53
>> /usr/lib/libmcrypt.4.dylib@ -> libmcrypt.4.4.8.dylib
>> lrwxr-xr-x   1 root  wheel     21B Sep 19 16:53
>> /usr/lib/libmcrypt.dylib@ -> libmcrypt.4.4.8.dylib
>> -rwxr-xr-x   1 root  wheel    801B Sep 19 16:53 /usr/lib/ 
>> libmcrypt.la*
>>
>> But this is the output from setting up python-mcrypt
>>
>> # python setup.py build
>> running build
>> running build_ext
>> building 'mcrypt' extension
>> creating build
>> creating build/temp.macosx-10.3-fat-2.5
>> gcc -arch ppc -arch i386 -isysroot /Developer/SDKs/MacOSX10.4u.sdk
>> -fno-strict-aliasing -Wno-long-double -no-cpp-precomp -mno-fused-madd
>> -fno-common -dynamic -DNDEBUG -g -O3 -DVERSION="1.1" -I/usr/include
>> -I/Library/Frameworks/Python.framework/Versions/2.5/include/ 
>> python2.5 -c
>> mcrypt.c -o build/temp.macosx-10.3-fat-2.5/mcrypt.o
>> creating build/lib.macosx-10.3-fat-2.5
>> gcc -arch i386 -arch ppc -isysroot /Developer/SDKs/MacOSX10.4u.sdk -g
>> -bundle -undefined dynamic_lookup
>> build/temp.macosx-10.3-fat-2.5/mcrypt.o -lmcrypt -o
>> build/lib.macosx-10.3-fat-2.5/mcrypt.so
>> /usr/bin/ld: for architecture ppc
>> /usr/bin/ld: can't locate file for: -lmcrypt
>> collect2: ld returned 1 exit status
>> /usr/bin/ld: for architecture i386
>> /usr/bin/ld: can't locate file for: -lmcrypt
>> collect2: ld returned 1 exit status
>> lipo: can't open input file: /var/tmp//ccGRKjU2.out (No such file or
>> directory)
>> error: command 'gcc' failed with exit status 1
>>
>>
>> What am I missing here? I linked PHP with the same libmcrypt library
>> just fine. This is only happening for this extension only.
>
> Try setting the DYLD_LIBRARY_PATH might help. Or altering the setup.py
> to add -L/usr/lib.
>
> Diez
> -- 
> http://mail.python.org/mailman/listinfo/python-list

Nope, that didn't do it.
The first clue I got that something is wrong was that mcrypt.h could  
not be found. Even though it exists in /usr/include. So I added the  
include_dirs and library_dirs to setup.py


mcrypt=Extension(
	"mcrypt",
	sources=["mcrypt.c"],
	include_dirs=['/usr/include'],
	libraries=["mcrypt"],
	library_dirs=["/usr/lib"],
	define_macros=[("VERSION", '"%s"'%VERSION)]
)

setup(name="python-mcrypt",
       version = VERSION,
       description = "Python interface to mcrypt library",
       author = "Gustavo Niemeyer",
       author_email = "niemeyer at conectiva.com",
       license = "LGPL",
       long_description = \
"""
Python interface to mcrypt library.
""",
       ext_modules = [mcrypt],
       )


I'm still getting the same output:
unning build
running build_ext
building 'mcrypt' extension
gcc -arch i386 -arch ppc -isysroot /Developer/SDKs/MacOSX10.4u.sdk -g  
-bundle -undefined dynamic_lookup build/temp.macosx-10.3-fat-2.5/ 
mcrypt.o -L/usr/lib -lmcrypt -o build/lib.macosx-10.3-fat-2.5/mcrypt.so
/usr/bin/ld: for architecture ppc
/usr/bin/ld: can't locate file for: -lmcrypt
collect2: ld returned 1 exit status
/usr/bin/ld: for architecture i386
/usr/bin/ld: can't locate file for: -lmcrypt
collect2: ld returned 1 exit status
lipo: can't open input file: /var/tmp//ccqN4eHR.out (No such file or  
directory)
error: command 'gcc' failed with exit status 1


It makes no sense, so I went to another brand new mac, installed  
XCode and Python 2.5 and libmcrypt-2.5.8. I got the same results. So  
I'm at a loss, how can ld not see libmcrypt.

I'm digging into disutils.sysconfig to see what is the build  
environment that disutils is using.
Does anyone know how to build an extension manually? without using  
distutils. If I can get it to build outside of distutils I might be  
able to figure out what need to be done.

Thx



From bj_666 at gmx.net  Fri Sep 21 02:14:26 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: 21 Sep 2007 06:14:26 GMT
Subject: Drawing a 640x480 Raw Image
References: <QRGIi.54592$YL5.52604@newssvr29.news.prodigy.net>
	<oaHIi.3304$4J3.1437@newssvr22.news.prodigy.net>
Message-ID: <5lh5q2F87tctU1@mid.uni-berlin.de>

On Thu, 20 Sep 2007 20:49:59 -0700, W. Watson wrote:

> W. Watson wrote:
>> I'm getting a 640x480 greyscale image from a video device. I'd like to 
>> place it on a canvas and then draw on the image. Does PIL or some image 
>> facility allow me to do that?
>
> Corrected misspelling in Subject. The image here is nothing more than a 
> 640x480 byte array. Each byte is a gra[e]yscale value.

PIL can do this:

from PIL import Image

def main():
    width = 640
    height = 480
    image = Image.new('L', (width, height))
    data = [x * y % 256 for x in xrange(width) for y in xrange(height)]
    image.putdata(data)
    image.save('test.png')

`data` can be any iterable with byte values.

Ciao,
	Marc 'BlackJack' Rintsch


From stefan.behnel-n05pAM at web.de  Sat Sep 15 11:05:57 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Sat, 15 Sep 2007 17:05:57 +0200
Subject: python 2.5 cElementTree entity troubles
In-Reply-To: <46EBEEFF.80106@web.de>
References: <5l22jsF5taqoU1@mid.uni-berlin.de> <46EBEEFF.80106@web.de>
Message-ID: <46EBF4D5.3080104@web.de>

Stefan Behnel wrote:
> Diez B. Roggisch wrote:
>> Any suggestions on how to teach the built-in ET-parser entities?
> 
> As you already do it in your code.
> 
> http://effbot.org/elementtree/elementtree-xmlparser.htm#tag-ET.XMLParser.entity

Hmmm, I never needed this, but the test doesn't work for me either (with ET
1.3, Python 2.5.1). ET's parser uses the generic expat callback for entities,
but it doesn't seem to get called for entities on my side... Looks like
something's broken there.

Stefan


From jeff at jmcneil.net  Wed Sep 12 16:16:44 2007
From: jeff at jmcneil.net (Jeff McNeil)
Date: Wed, 12 Sep 2007 16:16:44 -0400
Subject: xmlrpclib and SimpleXMLRPCServer questions
In-Reply-To: <82d28c40709121315k375dee7eu902261f1d0f0aaf@mail.gmail.com>
References: <1189626704.033328.9500@k79g2000hse.googlegroups.com>
	<82d28c40709121315k375dee7eu902261f1d0f0aaf@mail.gmail.com>
Message-ID: <82d28c40709121316x5fd9f34aja2737eb87e1e4b26@mail.gmail.com>

Duh... you can pass allow_none=True to SimpleXMLRPCServer()....


On 9/12/07, Jeff McNeil <jeff at jmcneil.net> wrote:
> Have a look at the XMLRPC specification @ http://www.xmlrpc.com/spec.
> There is no representation of NULL/None, thus server refuses to
> Marshall the 'None' value.  Update your server methods to return a
> value other than None and that message will go away.
>
> The other option is to set 'allow_none' to True on the Marshaller
> object. Doing so will turn your 'None' return values into XML-RPC
> '<nil/>' entities.  The 'nil' type is defined as an XMLRPC extension
> (I'm not sure how widely adopted it is, though).  See
> http://ontosys.com/xml-rpc/extensions.php.  I'm not sure you can do
> that without inheriting from the dispatcher code and "rolling your
> own."
>
> I find it much easier to 'return True' and ignore the value.
>
> -Jeff
>
> On 9/12/07, xkenneth <xkenneth at gmail.com> wrote:
> > So i've been trying to set up a simple server and client through
> > XMLRPC in python.
> >
> > Here's my code:
> >
> > SERVER
> >
> > import SimpleXMLRPCServer
> >
> >
> > class DataServer:
> >     def __init__(self):
> >         pass
> >
> >     def test(self,test):
> >         self.this = test
> >
> >     def show(self):
> >         print self.this
> >
> > server = SimpleXMLRPCServer.SimpleXMLRPCServer(("localhost", 8005))
> > server.register_instance(DataServer())
> > server.serve_forever()
> >
> > CLIENT
> > import xmlrpclib
> > server = xmlrpclib.Server('http://localhost:8005')
> > server.test(5)
> > server.show()
> >
> >
> > Now, I'm getting the most odd callback from the client side:
> >
> > >>> server.show()
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in ?
> >   File "/opt/local/Library/Frameworks/Python.framework/Versions/2.4/
> > lib/python2.4/xmlrpclib.py", line 1096, in __call__
> >     return self.__send(self.__name, args)
> >   File "/opt/local/Library/Frameworks/Python.framework/Versions/2.4/
> > lib/python2.4/xmlrpclib.py", line 1383, in __request
> >     verbose=self.__verbose
> >   File "/opt/local/Library/Frameworks/Python.framework/Versions/2.4/
> > lib/python2.4/xmlrpclib.py", line 1147, in request
> >     return self._parse_response(h.getfile(), sock)
> >   File "/opt/local/Library/Frameworks/Python.framework/Versions/2.4/
> > lib/python2.4/xmlrpclib.py", line 1286, in _parse_response
> >     return u.close()
> >   File "/opt/local/Library/Frameworks/Python.framework/Versions/2.4/
> > lib/python2.4/xmlrpclib.py", line 744, in close
> >     raise Fault(**self._stack[0])
> > xmlrpclib.Fault: <Fault 1: 'exceptions.TypeError:cannot marshal None
> > unless allow_none is enabled'>
> >
> > What is causing this? The server recieves the data and seems to
> > respond properly regardless of this error, so by all means i can
> > always catch it, but that sounds stupid.
> >
> > Here I can verify the server process is indeed recieving the data
> > (calling the client with two different values):
> >
> > localhost - - [12/Sep/2007 14:35:18] "POST /RPC2 HTTP/1.0" 200 -
> > 5
> > localhost - - [12/Sep/2007 14:35:41] "POST /RPC2 HTTP/1.0" 200 -
> > 10
> >
> > Looking at the documentation:
> >
> > class SimpleXMLRPCServer(       addr[, requestHandler[,
> > logRequests[allow_none[, encoding]]]])
> >
> > I'm not sure how to specify the allow_none value or it's type, how can
> > i find out more?
> >
> > Thanks for the help!
> >
> > Regards,
> > Ken
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>


From nirmaljs at lasonindia.com  Mon Sep 17 07:17:22 2007
From: nirmaljs at lasonindia.com (Nirmal)
Date: Mon, 17 Sep 2007 16:47:22 +0530
Subject: return codes from os.spawn
Message-ID: <014901c7f91c$52493b40$9817100a@INDIALASON.COM>

Hi,

When I try running java through os.spawnv with P_NOWAIT,  it returns the
process id

>>> os.spawnv(os.P_NOWAIT, '$JAVA_HOME/bin', ('java', '$JAVA_HOME/bin/java
ex3178 true'))
19524

then I removed the command line parameter in the java command to fail ( it
should throw an exception)  the process and ran it. This time also it
returned the process id .

>>> os.spawnv(os.P_NOWAIT, '$JAVA_HOME/bin', ('java', '$JAVA_HOME/bin/java
ex3178'))
21947


And I tried the same by using P_WAIT  and it returned the same exit code

>>> os.spawnv(os.P_WAIT, '$JAVA_HOME/bin', ('java', '$JAVA_HOME/bin/java
ex3178 true))
127
>>> os.spawnv(os.P_WAIT, '$JAVA_HOME/bin', ('java', '$JAVA_HOME/bin/java
ex3178'))
127


please let me know how can we identify that the process is completed
successfully or not ?

Thanks,
Nirmal






From filipe at ipb.pt  Thu Sep  6 05:00:28 2007
From: filipe at ipb.pt (Filipe Sousa)
Date: Thu, 06 Sep 2007 10:00:28 +0100
Subject: sqlite3.OperationalError: Could not decode to UTF-8 column
In-Reply-To: <mailman.100.1189009976.2658.python-list@python.org>
References: <fbmirn$4lp$1@cronus.fccn.pt>
	<mailman.100.1189009976.2658.python-list@python.org>
Message-ID: <fbofqa$lfu$1@cronus.fccn.pt>

Carsten Haese wrote:
> On Wed, 2007-09-05 at 16:40 +0100, Filipe Sousa wrote:
> 
> Try setting
> 
> conn.text_factory = str
> 
> where conn is the name of your sqlite3 connection object. See
> http://docs.python.org/lib/sqlite3-Connection-Objects.html for more
> information.
> 
> HTH,
> 

Thanks!
It works :)


From paul.hankin at gmail.com  Thu Sep 20 15:19:49 2007
From: paul.hankin at gmail.com (Paul Hankin)
Date: Thu, 20 Sep 2007 19:19:49 -0000
Subject: A struct for 2.4 that supports float's inf and nan?
In-Reply-To: <mailman.784.1190235594.2658.python-list@python.org>
References: <mailman.784.1190235594.2658.python-list@python.org>
Message-ID: <1190315989.268629.37520@22g2000hsm.googlegroups.com>

On Sep 19, 9:58 pm, "Joshua J. Kugler" <jos... at eeinternet.com> wrote:
> I'm trying to put some values into a struct.  Some of these values are NaN
> and Inf due to the nature of the data.  As you well may know, struct (and
> other things) in Python <= 2.4 doesn't support inf and nan float values.
> You get the dreaded "SystemError: frexp() result out of range" error.
>
> Before I go and write my own little wrapper, has anyone out there written
> an "extended" struct that supports the inf and nan values?  I know this is
> fixed in 2.5, but using that isn't an option at this point, as users will
> be running older versions of python.
>
> I suppose I could get the relevant source from the 2.5 source and compile it
> as a custom package, but that wouldn't be very transparent for my users,
> and would probably be getting in way over my head. :)
>
> Ideas?  Suggestions?

Here's a wrapped pack:

import struct

pack_double_workaround = {
  'inf': struct.pack('Q', 0x7ff0000000000000L),
  '-inf': struct.pack('Q', 0xfff0000000000000L),
  'nan': struct.pack('Q', 0x7ff8000000000000L)
}

def pack_one_safe(f, a):
  if f == 'd' and str(f) in pack_double_workaround:
      return pack_double_workaround[str(f)]
  return struct.pack(f, a)

def pack(fmt, *args):
  return ''.join(pack_one_safe(f, a) for f, a in zip(fmt, args))

Unpacking is similar: unpack doubles with 'Q' and test the
long for equality with +-inf, and find nan's by checking bits
52 to 62. If the number's ok, unpack again using 'd'.

You can get python values for nan, -inf and inf by using
float('nan'), float('-inf'), float('inf').

I've not been able to properly test this, as struct seems
to work fine in Python 2.3 and 2.4 on MacOS X.

HTH
--
Paul Hankin



From lasses_weil at klapptsowieso.net  Fri Sep  7 05:12:05 2007
From: lasses_weil at klapptsowieso.net (Wildemar Wildenburger)
Date: Fri, 07 Sep 2007 11:12:05 +0200
Subject: Checking if elements are empty
In-Reply-To: <fbqedh$31g$1@lust.ihug.co.nz>
References: <2323A6D37908A847A7C32F1E3662C80E010A0246@dc1ex01.air.org>
	<fbme5d$qa$1@sea.gmane.org>
	<mailman.93.1189003016.2658.python-list@python.org>
	<fbqedh$31g$1@lust.ihug.co.nz>
Message-ID: <46e115e5$0$7691$9b4e6d93@newsspool2.arcor-online.net>

Lawrence D'Oliveiro wrote:
> In message <mailman.93.1189003016.2658.python-list at python.org>, Chris Mellon
> wrote:
> 
>> On 9/5/07, Steve Holden <steve at holdenweb.com> wrote:
>>> Doran, Harold wrote:
>>>> Is there a way to check if the first element of y is null?
>>>>
>>> len(y[0]) == 0
>>>
>> Better spelled as
>>
>> if y[0]:
> 
> Not a good idea.

Why not?

/W


From chris.monsanto at gmail.com  Fri Sep 21 16:44:26 2007
From: chris.monsanto at gmail.com (chris.monsanto at gmail.com)
Date: Fri, 21 Sep 2007 13:44:26 -0700
Subject: RE Help
In-Reply-To: <mailman.891.1190405381.2658.python-list@python.org>
References: <1190399985.324448.242610@d55g2000hsg.googlegroups.com>
	<mailman.891.1190405381.2658.python-list@python.org>
Message-ID: <1190407466.967512.120250@w3g2000hsg.googlegroups.com>

On Sep 21, 4:09 pm, Thomas Jollans <tho... at jollans.com> wrote:
> On Friday 21 September 2007, byte8b... at gmail.com wrote:
>
> > Not specific to Python, but it will be implemented in it... how do I
> > compile a RE to catch everything between two know values? Here's what
> > I've tried (but failed) to accomplish... the knowns here are START and
> > END:
>
> > data = "asdfasgSTARTpruyerfghdfjENDhfawrgbqfgsfgsdfg"
> > x = re.compile('START.END', re.DOTALL)
>
> > x.findall(data)
>
> I'm not sure finding a variable number of occurences can be done with re. How
> about
>
> # data = the string
> strings = []
> for s in data.split('START')[1:]:
>     strings.append(s.split('END')[0])

use re.findall :-)



From tew24 at spam.ac.uk  Thu Sep 13 10:08:44 2007
From: tew24 at spam.ac.uk (Tom Wright)
Date: Thu, 13 Sep 2007 15:08:44 +0100
Subject: recursion
References: <fcbfnj$lh4$1@ss408.t-com.hr>
Message-ID: <fcbg9c$1vi$1@gemini.csx.cam.ac.uk>

Gigs_ wrote:
> Can someone explain me this
> def f(l):
>   if l == []:
>     return []
>   else:
>     return f(l[1:]) + l[:1]  # <= cant figure this, how is 
>                                   all sum at the end? 

If you think about building up from the simplest case:
f([]) = []
f(['a']) = f([]) + ['a'] = [] + ['a'] = ['a']

Now f(['a', 'b']) is going to be:
f(['b']) + ['a']
= ['b'] + ['a']
= ['b', 'a']

Similarly, for f(['a', 'b', 'c']), that will be:
f(['b', 'c']) + ['a']

Of course, if you want to do this you can always use list.reverse() but I
guess you're trying to get a handle on recursion rather than just reverse a
list.  I find thinking up from the base case helps when trying to
understand recursive code but when writing it, I tend to work the other way
around.


-- 
I'm at CAMbridge, not SPAMbridge


From __peter__ at web.de  Fri Sep 14 05:40:24 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 14 Sep 2007 11:40:24 +0200
Subject: extract text from log file using re
References: <mailman.498.1189710574.2658.python-list@python.org>
Message-ID: <fcdku8$a7r$01$2@news.t-online.com>

Fabian Braennstroem wrote:

> I would like to delete a region on a log file which has this
> kind of structure:
> 
> 
> #------flutest------------------------------------------------------------
>    498 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04
> 8.3956e-04 3.8560e-03 4.8384e-02 11:40:01  499
>    499 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04
> 8.3956e-04 3.8560e-03 4.8384e-02 11:40:01  499
> reversed flow in 1 faces on pressure-outlet 35.
> 
> Writing
> "/home/gcae504/SCR1/Solververgleich/Klimakruemmer_AK/CAD/Daimler/fluent-0500.cas"...
>  5429199 mixed cells, zone 29, binary.
> 11187656 mixed interior faces, zone 30, binary.
>    20004 triangular wall faces, zone 31, binary.
>     1104 mixed velocity-inlet faces, zone 32, binary.
>   133638 triangular wall faces, zone 33, binary.
>    14529 triangular wall faces, zone 34, binary.
>     1350 mixed pressure-outlet faces, zone 35, binary.
>    11714 mixed wall faces, zone 36, binary.
>  1232141 nodes, binary.
>  1232141 node flags, binary.
> Done.
> 
> 
> Writing
> "/home/gcae504/SCR1/Solververgleich/Klimakruemmer_AK/CAD/Daimler/fluent-0500.dat"...
> Done.
> 
>    500 1.0049e-03 2.4630e-04 9.8395e-05 1.4865e-04
> 8.3913e-04 3.8545e-03 1.3315e-01 11:14:10  500
> 
>  reversed flow in 2 faces on pressure-outlet 35.
>    501 1.0086e-03 2.4608e-04 9.8589e-05 1.4908e-04
> 8.3956e-04 3.8560e-03 4.8384e-02 11:40:01  499
> 
> #------------------------------------------------------------------
> 
> I have a small script, which removes lines starting with
> '(re)versed', '(i)teration' and '(t)urbulent'  and put the
> rest into an array:
> 
> # -- plot residuals ----------------------------------------
>       import re
> filename="flutest"
> reversed_flow=re.compile('^\ re')
> turbulent_viscosity_ratio=re.compile('^\ tu')
> iteration=re.compile('^\ \ i')
> 
> begin_of_res=re.compile('>\ \ \ i')
> end_of_res=re.compile('^\ ad')

The following regular expressions have some extra backslashes 
which change their meaning:

> begin_of_writing=re.compile('^\Writing')
> end_of_writing=re.compile('^\Done')

But I don't think you need regular expressions at all. 
Also, it's better to iterate over the file just once because 
you don't need to remember the position of regions to be skipped. 
Here's a simplified demo:

def skip_region(items, start, end):
    items = iter(items)
    while 1:
        for line in items:
            if start(line):
                break
            yield line
        else:
            break
        for line in items:
            if end(line):
                break
        else:
            break

def begin(line): 
    return line.strip() == "Writing"

def end(line): 
    return line.strip() == "Done."

# --- begin demo setup (remove to test with real data) ---
def open(filename):
    from StringIO import StringIO
    return StringIO("""\
iteration # to be ignored
alpha
beta
    reversed # to be ignored
Writing
to
be
ignored
Done.
gamma
delta

""")
# --- end demo setup ---

if __name__ == "__main__":
    filename = "fluetest"
    for line in skip_region(open(filename), begin, end):
        line = line.strip()
        if line and not line.startswith(("reversed", "iteration")):
            print line

skip_region() takes a file (or any iterable) and two functions
that test for the begin/end of the region to be skipped.
You can nest skip_region() calls if you have regions with different 
start/end conditions.

Peter


From gregpinero at gmail.com  Thu Sep 27 20:01:57 2007
From: gregpinero at gmail.com (gregpinero at gmail.com)
Date: Fri, 28 Sep 2007 00:01:57 -0000
Subject: How to Catch Errors in SimpleXMLRPCServer
In-Reply-To: <mailman.1189.1190927303.2658.python-list@python.org>
References: <1190921745.575519.53560@y42g2000hsy.googlegroups.com>
	<mailman.1184.1190922958.2658.python-list@python.org>
	<1190926533.435603.245530@o80g2000hse.googlegroups.com>
	<mailman.1189.1190927303.2658.python-list@python.org>
Message-ID: <1190937717.905184.256730@g4g2000hsf.googlegroups.com>

On Sep 27, 5:08 pm, "Jeff McNeil" <j... at jmcneil.net> wrote:
> Yeah, that code was out of memory and I didn't test it, my apologies.
> Need to actually return a value from _dispatch.
>
> class MyCalls(object):
>    def _dispatch(self, method, args):
>        try:
>            return getattr(self, method)(*args)
>        except:
>            handle_logging()
>
> server = SimpleXMLRPCServer(("localhost", 8000))
> server.register_instance(MyCalls())
> server.serve_forever()
>

Thanks, that works.  I'm not sure why I didn't notice it wasn't
returning anything.

-Greg




From gagsl-py2 at yahoo.com.ar  Sun Sep 23 18:24:45 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 23 Sep 2007 19:24:45 -0300
Subject: strange behavious of the logging module?
References: <fd6n9i$8hc$1@news1.zdv.uni-mainz.de>
Message-ID: <op.ty4ojjjix6zn5v@a98gizw.cpe.telecentro.net.ar>

En Sun, 23 Sep 2007 18:53:53 -0300, Christian Meesters  
<meesters at uni-mainz.de> escribi?:

> import logging
> logging.basicConfig(level=logging.ERROR,
>                     format='%(levelname)-8s %(message)s',
>                     filename='mc_rigid.log',
>                     filemode='w')
> # define a Handler which writes INFO messages or higher to the sys.stderr
> console = logging.StreamHandler()
> console.setLevel(logging.INFO)
> # set a format which is simpler for console use
> formatter = logging.Formatter('%(message)s')
> # tell the handler to use this format
> console.setFormatter(formatter)
> # add the handler to the root logger
> logging.getLogger('').addHandler(console)
>
> I observe nothing printed on the console. However if I change the level
> (just after the import) from logging.ERROR to logging.DEBUG I do see all
> info lines on the console as intended.

basicConfig sets the root logger level; if it's ERROR, nothing below ERROR  
will pass. Your handler does not have a chance to get the message.

> Can anybody tell my mistake? I thought changing the level in basicConfig
> would have no impact on the following StreamHandler instance.

basicConfig sets the overall verbosity of your application.

> Also, adding %(funcName)-8s to the formatter in basigConfig does not work
> for me: instead of the functions name the level in lower case gets  
> inserted
> into the logfile.

Looks like a bug...

-- 
Gabriel Genellina



From gheorghe.postelnicu at gmail.com  Thu Sep 13 14:10:26 2007
From: gheorghe.postelnicu at gmail.com (Gheorghe Postelnicu)
Date: Thu, 13 Sep 2007 21:10:26 +0300
Subject: Troubleshooting installing new package
Message-ID: <8094b1b60709131110y893a6b9re77aca62b98b8b4f@mail.gmail.com>

Hi,

I have Python 2.5 installed on WinXP and I am trying to install a new
package. I ran the setup.py build and I get the following message:

C:\packages\reedsolomon-0.1>setup.py build
running build
running build_ext
error: Python was built with Visual Studio 2003;
extensions must be built with a compiler than can generate compatible binaries.
Visual Studio 2003 was not found on this system. If you have Cygwin installed,
you can try compiling with MingW32, by passing "-c mingw32" to setup.py.

I have Visual Studio 2005 Express (the free one) installed. Is there a
way to specify an option to compile using that version of the
compiler?

Sorry for the silly question and thanks in advance for any helpful suggestions!
-- 
Gheorghe Postelnicu, PhD
MGH, Harvard Medical School


From http  Sat Sep 22 14:54:03 2007
From: http (Paul Rubin)
Date: 22 Sep 2007 11:54:03 -0700
Subject: Getting rid of bitwise operators in Python 3?
References: <46f49740$0$32514$4c368faf@roadrunner.com>
Message-ID: <7xtzpmsf90.fsf@ruckus.brouhaha.com>

Carl Banks <pavlovevidence at gmail.com> writes:
> If anyone says, "But that takes away an easy test for oddness (x&1)!", 
> or, "But you can multiply powers of two using left shift!  Isn't that 
> cool?", I'm not buying it.  Those are gimmicks.  Arithmetic operations 
> should be done with arithmetic operators.  The bitwise operators make the 
> code much less readable, especially to people unfamiliar with this usage.

The bitwise operators are used for set operations, which were
added fairly recently, if that hasn't been mentioned yet.  They
make good sense for that.


From drobinow at gmail.com  Sat Sep  1 18:36:26 2007
From: drobinow at gmail.com (drobinow at gmail.com)
Date: Sat, 01 Sep 2007 22:36:26 -0000
Subject: Looking for Delaunay triangulation module...
In-Reply-To: <13dhqbm42tr1i7b@corp.supernews.com>
References: <13dge9m2339ka68@corp.supernews.com><fbag9e$gnm$3@lust.ihug.co.nz>
	<13dhqbm42tr1i7b@corp.supernews.com>
Message-ID: <1188686186.415022.293900@19g2000hsx.googlegroups.com>

On Sep 1, 12:24 am, Grant Edwards <gra... at visi.com> wrote:
> On 2007-09-01, Lawrence D'Oliveiro <l... at geek-central.gen.new_zealand> wrote:
> > In message <13dge9m2339k... at corp.supernews.com>, Grant Edwards wrote:
>
> >> So for lack of a delaunay module, I'm stuck trying to port my
> >> application to Win32.
>
> > Why not run it under Cygwin? :)
> I'm hoping there is an easier way than trying to build a
> half-dozen large Python extensions (and their supporting
> libraries) under Cygwin.

 Well, that's what Cygwin is for -- to make it easy to do that.
What's not working?

 I'm also not clear what your problem is with Delny with qhull under
Windows.
What errors have you gotten?
All the tests pass for me.




From bbxx789_05ss at yahoo.com  Thu Sep 20 15:25:12 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: Thu, 20 Sep 2007 12:25:12 -0700
Subject: subprocess: returncode v. poll()
In-Reply-To: <1190315820.532320.26570@22g2000hsm.googlegroups.com>
References: <1190315820.532320.26570@22g2000hsm.googlegroups.com>
Message-ID: <1190316312.929039.85670@o80g2000hse.googlegroups.com>

On Sep 20, 1:17 pm, 7stud <bbxx789_0... at yahoo.com> wrote:
> Hi,
>
> What is the difference between:
>
> 1) getting the returncode directly from the subprocess object
> 2) calling poll() on the subprocess object?
>
> Here is an example:
>
> import subprocess
>
> p = subprocess.Popen("ls", stdout=subprocess.PIPE)
> print p.returncode
> print p.poll()
> print
>
> print p.stdout.read()[:5]
> print
>
> print p.returncode
> print p.poll()
> print p.returncode
>
> --output:--
> None
> None
>
> 10tes
>
> None
> 0
> 0

Hmm....after a little more testing, I don't think returncode
dynamically updates:

import subprocess
import time

p = subprocess.Popen("ls", stdout=subprocess.PIPE)

print p.returncode
time.sleep(5)
print p.returncode
time.sleep(2)
print p.returncode

print p.stdout.read()[:5]
print p.returncode

--output:--
None
None
None
10tes
None




From bignose+hates-spam at benfinney.id.au  Wed Sep 26 04:08:44 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 26 Sep 2007 18:08:44 +1000
Subject: Packaging and dependencies (was: setuptools without unexpected
	downloads)
References: <87ejgmklep.fsf@benfinney.id.au> <878x6ukkvq.fsf@benfinney.id.au>
	<5luhb0Faal8aU1@mid.uni-berlin.de>
Message-ID: <87zlz9kfw3.fsf_-_@benfinney.id.au>

"Diez B. Roggisch" <deets at nospam.web.de> writes:

> In my opinion, python is steering here to a direction like Java with
> it's classpath: scripts like workingenv and it's successor (forgot
> the name) provide hand-tailored environments for a specific
> application.

What a silly waste of resources. So, if fifteen different programs
depend on library X, we'd have fifteen *separate* installations of
library X on the same machine?

And when it comes time to upgrade library X because a security flaw is
discovered, each of the fifteen instances must be upgraded separately?

> So maybe you should rather try and bundle your app in a way that it
> is self-contained.

That entirely defeats the purpose of having packages declare
dependencies on each other. The whole point of re-usable library code
is to *avoid* having to re-bundle every dependency with every separate
application.

-- 
 \           "If [a technology company] has confidence in their future |
  `\      ability to innovate, the importance they place on protecting |
_o__)  their past innovations really should decline."  -- Gary Barnett |
Ben Finney


From mcl.office at googlemail.com  Fri Sep  7 08:52:07 2007
From: mcl.office at googlemail.com (mcl)
Date: Fri, 07 Sep 2007 05:52:07 -0700
Subject: MySQLdb: ValueError Something Stupid
In-Reply-To: <1189163332.990248.134080@d55g2000hsg.googlegroups.com>
References: <1189163332.990248.134080@d55g2000hsg.googlegroups.com>
Message-ID: <1189169527.020589.185120@w3g2000hsg.googlegroups.com>

On 7 Sep, 12:08, mcl <mcl.off... at googlemail.com> wrote:
> I have just started with python and MySQL.
>
> I have a simple test for each of my tables.
>
> The first two work as expected, but the third 'qlooks', gives a
> ValueError.
>
> If I copy and paste the SQL in the traceback to phpMyAdmin, it works
> as expected.
>
> Can anyone give a clue as to what I am doing wrong
>
> Python 2.4
> MySQL  4.1.22-standard
>
> The tablename qlooks is LOWERCASE
>
> Code =======================================================
>         cursor = gv.conn.cursor()
>         queries = ["%septi%"]
>         fields = ("qlTitle", "qlSubTitle", "qlPostCode", "qlMap",
> "qlDetails")
>         tblFields = "select * from qlooks "
>         whereTests = 'Where qlTitle like "%septi%"'
>         sql = tblFields + whereTests
>         #cursor.execute(sql)
>         cursor.execute('select * from PERMS')
>         row = cursor.fetchone()
>         print "Row=", row, gv.nl
>         cursor.execute('select * from LISTS')
>         row = cursor.fetchone()
>         print "Row=", row, gv.nl
>         cursor.execute('select * from qlooks')
>         row = cursor.fetchone()
>         print "Row=", row, gv.nl
>
>         cursor.close()
>
> ERROR TRACEBACK ++++++++++++++++++++++++++++++++++++++++
>
>    79         print "Row=", row, gv.nl
>    80         cursor.execute('select * from qlooks')
>    81         row = cursor.fetchone()
>    82         print "Row=", row, gv.nl
> cursor = <MySQLdb.cursors.Cursor instance>, cursor.execute = <bound
> method Cursor.execute of <MySQLdb.cursors.Cursor instance>>
>  /usr/lib/python2.4/site-packages/MySQLdb/cursors.py in
> execute(self=<MySQLdb.cursors.Cursor instance>, query='select * from
> qlooks', args=None)
>    93         """
>    94         del self.messages[:]
>    95         return self._execute(query, args)
>    96
>    97     def _execute(self, query, args):
> self = <MySQLdb.cursors.Cursor instance>, self._execute = <bound
> method Cursor._execute of <MySQLdb.cursors.Cursor instance>>, query =
> 'select * from qlooks', args = None
>  /usr/lib/python2.4/site-packages/MySQLdb/cursors.py in
> _execute(self=<MySQLdb.cursors.Cursor instance>, query='select * from
> qlooks', args=None)
>   112             exc, value, tb = exc_info()
>   113             del tb
>   114             self.errorhandler(self, exc, value)
>   115         self._executed = query
>   116         return r
> self = <MySQLdb.cursors.Cursor instance>, self.errorhandler = <bound
> method Connection.defaulterrorhandler of ...l.connection open to
> 'db.sabren.com' at 936cac4>>, exc = <class exceptions.ValueError>,
> value = <exceptions.ValueError instance>
>  /usr/lib/python2.4/site-packages/MySQLdb/connections.py in
> defaulterrorhandler(connection=<_mysql.connection open to
> 'db.sabren.com' at 936cac4>, cursor=<MySQLdb.cursors.Cursor instance>,
> errorclass=<class exceptions.ValueError>,
> errorvalue=<exceptions.ValueError instance>)
>    31     else:
>    32         connection.messages.append(error)
>    33     raise errorclass, errorvalue
>    34
>    35
> errorclass = <class exceptions.ValueError>, errorvalue =
> <exceptions.ValueError instance>
>
> ValueError: invalid literal for int(): 0-
>       args = ('invalid literal for int(): 0-',)
>
> =========================================
> Thanks Richard

Sort of solved it.

On that particular table it did not like * for all fields.

Any reason why that would be the case ?

Richard



From ldo at geek-central.gen.new_zealand  Thu Sep 27 01:53:44 2007
From: ldo at geek-central.gen.new_zealand (Lawrence D'Oliveiro)
Date: Thu, 27 Sep 2007 17:53:44 +1200
Subject: Delete values from a string using the index
References: <1190838311.630506.64670@y42g2000hsy.googlegroups.com>
Message-ID: <fdfgh8$27c$3@lust.ihug.co.nz>

In message <1190838311.630506.64670 at y42g2000hsy.googlegroups.com>, 
koutoo at hotmail.com wrote:

> How do I delete or remove values from a list or string using the
> index.

Note you can't do it with a string, since that's not mutable.


From steve at holdenweb.com  Tue Sep 25 23:19:29 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 25 Sep 2007 23:19:29 -0400
Subject: the address of list.append and list.append.__doc__
In-Reply-To: <1190775258.351819.24930@22g2000hsm.googlegroups.com>
References: <1190775258.351819.24930@22g2000hsm.googlegroups.com>
Message-ID: <fdcj40$mjj$1@sea.gmane.org>

HYRY wrote:
> I have the following questions, I am using Python 2.4.2
> 
>>>> a = [1,2,3]
>>>> id(a.append)
> 19167152           #1
>>>> id(list.append)
> 11306608           #1
> 
> 1. the address of a.append and list.append is different, can I get the
> address of list.append from a.append?
> 
No. a.append is a "bound method" - a method that already has an 
associated instance, that will be provided as the first argument to the 
method call. Bound methods are created "on the fly".

> 
>>>> id(a.append.__doc__)
> 19162720
>>>> id(a.append.__doc__)
> 19162336
>>>> id(a.append.__doc__)
> 19162592
>>>> id(a.append.__doc__)
> 19162720
>>>> id(list.append.__doc__)
> 19162336
>>>> id(list.append.__doc__)
> 19162720
>>>> id(list.append.__doc__)
> 19162592
>>>> id(list.append.__doc__)
> 19162336
> 2. why the address of a.append.__doc__ and list.append.__doc__ change,
> this means __doc__ is not a normal string, but something return a
> string.
> Don't know. WJFFM on 2.5.1:

 >>> id(list.append.__doc__)
2146574752
 >>> id(list.append.__doc__)
2146574752
 >>> id(list.append.__doc__)
2146574752
 >>> id(list.append.__doc__)
2146574752
 >>>

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC/Ltd           http://www.holdenweb.com
Skype: holdenweb      http://del.icio.us/steve.holden

Sorry, the dog ate my .sigline



From carsten at uniqsys.com  Mon Sep 24 07:43:03 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 24 Sep 2007 07:43:03 -0400
Subject: Almost There - os.kill()
In-Reply-To: <002601c7fe9d$52ffb9c0$f8ff2d40$@rawlins@thinkbluemedia.co.uk>
References: <002601c7fe9d$52ffb9c0$f8ff2d40$@rawlins@thinkbluemedia.co.uk>
Message-ID: <1190634183.3385.26.camel@dot.uniqsys.com>

On Mon, 2007-09-24 at 12:23 +0100, Robert Rawlins - Think Blue wrote:
>     os.kill(pid, 15)
> 
> TypeError: an integer is required
> 
>  
> 
> Which would suggest its passing those arguments in as the wrong data
> types to the kill command. What is the best way to convert these?

Instead of giving you the fish, I'll give you a fishing rod. Use
inspection, experimentation, and the online documentation to answer the
following questions:

1) What type is the argument currently?
2) What type does the os.kill function expect?
3) How can you convert an object of type 1 to an object of type 2?

-- 
Carsten Haese
http://informixdb.sourceforge.net




From horpner at yahoo.com  Wed Sep 12 12:58:15 2007
From: horpner at yahoo.com (Neil Cerutti)
Date: Wed, 12 Sep 2007 16:58:15 GMT
Subject: An ordered dictionary for the Python library?
References: <1189582425.329676.215730@r29g2000hsg.googlegroups.com>
	<13efnmi4n959a59@corp.supernews.com>
	<1189601205.503841.327170@o80g2000hse.googlegroups.com>
	<1189605250.186948.303130@50g2000hsm.googlegroups.com>
Message-ID: <slrnfeg2a9.21g.horpner@FIAD06.norwich.edu>

On 2007-09-12, Mark Summerfield <m.n.summerfield at googlemail.com>
wrote:
> Actually I meant by key order, so insertion order doesn't
> matter at all. If you need a dictionary-like data structure
> that respects insertion order you could use a list of (key,
> value) tuples.
>
> Another respondent asked about use cases.

A mapping with sorted keys could theoretically be convenient when
your keys are comparable but not hashable.

-- 
Neil Cerutti


From wizzardx at gmail.com  Fri Sep 28 02:40:14 2007
From: wizzardx at gmail.com (David)
Date: Fri, 28 Sep 2007 08:40:14 +0200
Subject: GUI for viewing/editing python data structures?
In-Reply-To: <fdem52$gl6$1@sea.gmane.org>
References: <fdem52$gl6$1@sea.gmane.org>
Message-ID: <18c1e6480709272340v13d36916r6d707d64759107cc@mail.gmail.com>

On 9/27/07, Joshua J. Kugler <joshua at eeinternet.com> wrote:
> A while back, I seem to remember coming across a small program that could
> view and edit python data structures via a nice expanding tree view.  I'm
> now in need of something like that (to verify data is imported correctly
> into a shelve file) and having a GUI would be much simpler than trying to
> wade through the output of str(d) or repr(d).
>
> I've tried googling with the obvious keywords (gui (view OR edit) python
> data structures) but t didn't get me anywhere.
>
> Pointers?
>

non-gui alternatives: Try pprint module. Or output as yaml (external
library) into a text file. You could also output as XML (using
built-in python modules), save to file and then use Firefox or another
XML gui to inspect it. I haven't done the latter before but it should
work.


From guruyaya at gmail.com  Mon Sep 17 06:21:57 2007
From: guruyaya at gmail.com (guruyaya)
Date: Mon, 17 Sep 2007 03:21:57 -0700
Subject: python libs for MinGW
In-Reply-To: <1190022847.857960.17720@19g2000hsx.googlegroups.com>
References: <1190022847.857960.17720@19g2000hsx.googlegroups.com>
Message-ID: <1190024517.087476.311460@n39g2000hsh.googlegroups.com>

Arrr after a small change in my google search, I have found this
tutorial:

http://www.mingw.org/MinGWiki/index.php/Python%20extensions

and it went ok (or at least seemed ok) until the last stage:
when I got this error:

C:\Documents and Settings\Yair Eshel\Desktop>dlltool --dllname
python23.dll --def python23.def --output-lib libpython23.a
dlltool: _spawnvp

It created libpython23.a as an empty file and it created a file called
dklfh.s (the name was changed every time I've started it) that
contain:
# IMAGE_IMPORT_DESCRIPTOR
        .section        .idata$2
        .global __head_libpython23_a
__head_libpython23_a:
        .rva    hname   #Ptr to image import by name list
        #this should be the timestamp, but NT sometimes
        #doesn't load DLLs when this is set.
        .long   0       # loaded time
        .long   0       # Forwarder chain
        .rva    __libpython23_a_iname   # imported dll's name
        .rva    fthunk  # pointer to firstthunk
#Stuff for compatibility
        .section        .idata$5
        .long   0
fthunk:
        .section        .idata$4
        .long   0
        .section        .idata$4
hname:



Anyone can help?



From christophertidy at hotmail.com  Mon Sep  3 06:50:26 2007
From: christophertidy at hotmail.com (christophertidy at hotmail.com)
Date: Mon, 03 Sep 2007 10:50:26 -0000
Subject: TypeError: 'module object is not callable'
In-Reply-To: <mailman.317.1188812089.28954.python-list@python.org>
References: <1188809299.316203.85930@22g2000hsm.googlegroups.com>
	<mailman.315.1188810174.28954.python-list@python.org>
	<46dbd11e$0$6228$426a74cc@news.free.fr>
	<mailman.317.1188812089.28954.python-list@python.org>
Message-ID: <1188816626.021956.281040@22g2000hsm.googlegroups.com>

Thank you for your help that seems to have done the trick.
You are correct Diez B. Roggisch that I come from a java background!

I have a new tiny problem I can't understand either.
Withing Step.py I have the following method

def isCompleted(self):
    "Check whether data step has been processed"
    return self.isCompleted

Then within main.py I simply wish to print the value of isCompleted
which I try to do by the following
print 'Magn completed status is',a.isCompleted()

Which returns the following error:
    a.isCompleted()
TypeError: 'int' object is not callable

I have tried ideas such as int(a.isCompleted) but to no prevail. Any
ideas?

Regards
Chris



From seanttierney at gmail.com  Fri Sep 21 19:04:39 2007
From: seanttierney at gmail.com (Sean Tierney)
Date: Fri, 21 Sep 2007 16:04:39 -0700
Subject: Zope review
In-Reply-To: <1190403772.862325.113960@y42g2000hsy.googlegroups.com>
References: <1190331847.514475.284200@22g2000hsm.googlegroups.com>
	<1190403772.862325.113960@y42g2000hsy.googlegroups.com>
Message-ID: <54e1e4bc0709211604s2672a79ci8a83cd11c9d402de@mail.gmail.com>

It might help if someone could contrast Zope w/ another Python
framework like Twisted.

I've been investing some time in learning Zope/Plone and would love to
hear someone speak to alternatives.

"part of the brain"  -- would that speak to the "event-based" approach
of Twisted?  The "event-based" approach is mentioned by John Goerzen
in "Foundations of Python Network Programming" (Apress).

Happy Times.


On 9/21/07, Istvan Albert <istvan.albert at gmail.com> wrote:
> On Sep 20, 7:44 pm, Norm <norman.bar... at gmail.com> wrote:
>
> > without meaning to start a flame war between the various python web
> > tools, I was wondering if anyone had a review of the status of Zope.
> > For example, is it being used for new projects or just maintenance?
>
> Zope is heavily used. It is a mature and reliable product. It is also
> very complicated and requires (enforces) a particular way of
> programming that can feel very burdensome if it does not 'fit your
> brain'.
>
> i.
>
>
>
>
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
Sean Tierney


From michael at jedimindworks.com  Sun Sep 30 14:54:38 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Sun, 30 Sep 2007 11:54:38 -0700
Subject: notify when process finishes (on unix)
In-Reply-To: <1191161510.764656.244540@57g2000hsv.googlegroups.com>
References: <1191161510.764656.244540@57g2000hsv.googlegroups.com>
Message-ID: <95871A89-AFCA-4BAA-B621-DB4810862FFC@jedimindworks.com>


On Sep 30, 2007, at 7:11 AM, bahoo wrote:
> I'd like to write a script that sends me an email when a unix (Linux)
> process ends running (or CPU drops below some threshold).  Could
> anyone point me to the relevant functions, or show me an example?

man at.




From david at asdf.asdf  Thu Sep  6 01:44:57 2007
From: david at asdf.asdf (bambam)
Date: Thu, 6 Sep 2007 15:44:57 +1000
Subject: concise code (beginner)
References: <13dsvqrqivtf092@corp.supernews.com>
Message-ID: <13dv4uqqb806ff0@corp.supernews.com>

First, thank you.

All of the suggestions match what we want to do much better
than what we are doing. We have a script, written in python,
which is doing testing. But the python script doesn't look anything
like the test script, because the python script is written in python,
and the test script is a series of instrument command macros.

By putting the script sequence into a collection that is separate
from the python code, we will get script list that general engineering
will find much easier to understand:


def script(self)
    def a0010(): global self; self.power_on([self.dev]);
    def a0020(): global self; self.dev.addLog([self.name, ' started']);
    def a0030(): global self; self.resetMinuteReg([self.dev]);
    def a0040(): global self; self.disablePLmessages([self.dev]);
    def a0050(): global self; self.dev.testH.writePLram((PL.BCAL12<<8));

Most of these won't generate exceptions: exceptions are expected
only on the calculations following the reads, but of course the
problem is that the exceptions are unexpected... The semi-colons
were already there, I've just stripped out the loops and exception
handlers. The original code is a mixture of functions with internal
and external [dev] loops.

Because of the sequence names, I have a choice of using generated
call names (James), or a static list of some sort.

Other possibilities might be
1) Using dir(script) to get a list of line functions
2) Using frame.f_lineno instead of line functions
3) Use an expression list instead of line functions
4) Multiple script objects with yield on each line.

The devices are in a list, and are removed by using pop(i). This
messes up the loop iteration, so it is actually done by setting a
flag on each device in the exception handler, with ANOTHER
loop after each write/read/calculate sequence. I left that out also
because I wanted to show the intended logic.

I'm not wedded to the idea of using sequence numbers for
line functions. Comments are welcome. Sorry I didn't include
this level of detail in the original, but I am interested in the
question at all levels.

Note that this achieves synchronous parallel processing --
another area I know nothing about -- but I'm just starting
with the code as I got it, and coding so far was focused
on hardware integration.

Steve.

"bambam" <david at asdf.asdf> wrote in message
news:13dsvqrqivtf092 at corp.supernews.com...
>I have about 30 pages (10 * 3 pages each) of code like this
> (following). Can anyone suggest a more compact way to
> code the exception handling? If there is an exception, I need
> to continue the loop, and continue the list.
>
> Steve.
>
> -----------------------------------
> for dev in devs
>    try:
>        dev.read1()
>    except
>        print exception
>        remove dev from devs
>
> for dev in devs
>    try:
>        dev.read2()
>    except
>        print exception
>        remove dev from devs
>
> for dev in devs
>    try:
>        dev.read3()
>    except
>        print exception
>        remove dev from devs
>
> etc.
>






From piet at cs.uu.nl  Mon Sep 10 15:34:02 2007
From: piet at cs.uu.nl (Piet van Oostrum)
Date: Mon, 10 Sep 2007 21:34:02 +0200
Subject: encoding latin1 to utf-8
References: <1189427146.723304.270600@22g2000hsm.googlegroups.com>
Message-ID: <m2sl5ml3h1.fsf@koshka.cs.uu.nl>

>>>>> Harshad Modi <modiinfo at gmail.com> (HM) wrote:

>HM> hello ,
>HM>  I make one function for encoding latin1 to utf-8. but i think it is
>HM> not work proper.
>HM> plz guide me.

>HM> it is not get proper result . such that i got "Belgi???" using this
>HM> method, (Belgium)  :

>HM> import codecs
>HM> import sys
>HM> # Encoding / decoding functions
>HM> def encode(filename):
>HM>  file = codecs.open(filename, encoding="latin-1")
>HM>  data = file.read()
>HM>  file = codecs.open(filename,"wb", encoding="utf-8")
>HM>  file.write(data)

>HM> file_name=sys.argv[1]
>HM> encode(file_name)

I tried this program and for me it works correctly. So you probably used a
wrong input file or you misinterpreted the output. To be sure make hex
dumps of your input/output.
-- 
Piet van Oostrum <piet at cs.uu.nl>
URL: http://www.cs.uu.nl/~piet [PGP 8DAE142BE17999C4]
Private email: piet at vanoostrum.org


From tommy.nordgren at comhem.se  Sun Sep 23 17:03:16 2007
From: tommy.nordgren at comhem.se (Tommy Nordgren)
Date: Sun, 23 Sep 2007 23:03:16 +0200
Subject: os.popen and lengthy operations
In-Reply-To: <91325fec0709192331i700cd172seb9534288f200424@mail.gmail.com>
References: <91325fec0709192331i700cd172seb9534288f200424@mail.gmail.com>
Message-ID: <B8230E44-AF99-43DC-8EAE-31E0033CDD34@comhem.se>


On 20 sep 2007, at 08.31, Dmitry Teslenko wrote:

> Hello!
> I'm using os.popen to perform lengthy operation such as building some
> project from source.
> It looks like this:
> def execute_and_save_output( command, out_file, err_file):
>
> import os
>
> def execute_and_save_output( command, out_file, err_file):
> 	(i,o,e) = os.popen3( command )
> 	try:
> 		for line in o:
> 			out_file.write( line )
>
> 		for line in e:
> 			err_file.write( line )
> 	finally:
> 		i.close()
> 		o.close()
> 		e.close()
>
> ...
> execute_and_save_output( '<some long to run command>', out_file,  
> err_file)
>
> Problem is that script hangs on operations that take long to execute
> and have lots of output such as building scripts.
> -- 
	Your problem is that you are not reading the standard output and  
standard error streams in the correct way.
You need to do the reading of standard out and standard err in  
parallell rather than sequentially.
The called process can't proceed when it's output buffers are full.  
Pipes is limited by small buffers (for examples 512 bytes
on Mac OS X)
-------------------------------------
This sig is dedicated to the advancement of Nuclear Power
Tommy Nordgren
tommy.nordgren at comhem.se





From frank at chagford.com  Tue Sep 11 09:48:10 2007
From: frank at chagford.com (Frank Millman)
Date: Tue, 11 Sep 2007 06:48:10 -0700
Subject: Minor documentation bug
Message-ID: <1189518490.939985.101460@g4g2000hsf.googlegroups.com>

Hi all

I spotted a minor bug in the documentation to SimpleXMLRPCServer. It
does not seem worth getting a login to the bugtracker just to enter
this, so if it is confirmed as a bug perhaps someone would be so kind
as to enter it for me.

Background:

    xmlrpclib.py has the following -

    # This class is available as ServerProxy and Server.  New code
should
    # use ServerProxy, to avoid confusion.
    #
    ...
    class ServerProxy:
        ...
    Server = ServerProxy

The bug:

    Section 18.25.1 SimpleXMLRPCServer Objects
        ...
    Example:
        ...
    The following client code will call the methods made available by
the preceding server:

    import xmlrpclib

    s = xmlrpclib.Server('http://localhost:8000')

It should say:

    s = xmlrpclib.ServerProxy('http://localhost:8000')

As I said, it is minor, but it had me confused for a couple of
minutes, as there is no class called Server in the documentation for
xmlrpclib itself.

It present in the 2.5 and the 2.6 docs.

Thanks

Frank Millman



From http  Sat Sep 29 02:06:22 2007
From: http (Paul Rubin)
Date: 28 Sep 2007 23:06:22 -0700
Subject: Python  and SSL
References: <1190959345.041723.108130@k79g2000hse.googlegroups.com>
	<46fd7e7b$0$18410$9b622d9e@news.freenet.de>
Message-ID: <7x641u0zvl.fsf@ruckus.brouhaha.com>

"Martin v. L?wis" <martin at v.loewis.de> writes:
> > But how can I tell my Python program to trust my SSL certificate?
> 
> Why do you want to tell it that? The SSL module will trust *any*
> server certificate, no need to tell it explicitly which ones to
> trust.

Er, the whole idea of SSL is that you don't trust the connection.  So
failing to authenticate the other end is a security failure and SSL
should not be used that way.  From RFC 4346:

   Warning: Completely anonymous connections only provide protection
            against passive eavesdropping.  Unless an independent
            tamper-proof channel is used to verify that the finished
            messages were not replaced by an attacker, server
            authentication is required in environments where active
            man-in-the-middle attacks are a concern.

It's silly to worry about an eavesdropper being nosy enough to
intercept your data passively, but somehow still expect them to be
considerate enough to not use an MITM attack.  Always use
authentication if it's worth bothering with cryptographic security at
all.  

Another plan for server to server communication might be to use a VPN
rather than connection level SSL.  That would simplify your
application programming if you can set up the encrypted network at
both ends.


From deets at nospam.web.de  Fri Sep 28 03:32:27 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 28 Sep 2007 09:32:27 +0200
Subject: Python 3.0 migration plans?
In-Reply-To: <1190949502.875203.57690@w3g2000hsg.googlegroups.com>
References: <mailman.1195.1190936289.2658.python-list@python.org>
	<1190942968.920485.311870@g4g2000hsf.googlegroups.com>
	<87641v4j38.fsf@benfinney.id.au>
	<1190949502.875203.57690@w3g2000hsg.googlegroups.com>
Message-ID: <5m3p1dFbl98pU1@mid.uni-berlin.de>

TheFlyingDutchman schrieb:
>>   - Abstract Base Classes
>>     <URL:http://www.python.org/dev/peps/pep-3119/>
>>
> 
> I like how someone here characterized decorators - those silly @
> things. They remind me of Perl. Not adding keywords for abstract and
> static is like Perl not adding a keyword for class. But I know all
> such additions are vigorously defended by the most ardent users of
> each language.

The fact that you compare and criticise the simple annotations like 
static or abstract with the much more powerful decorator concept shows 
that, despite being the maintainer of a 
soon-to-be-ruling-the-python-world Python 3 fork, lack understanding of 
even the most basic language features. Which isn't exactly news.[1]

The decorator syntax was vigorously discussed. I personally don't mind 
the @-based syntax, but could live with anything else - because I like 
and often need the feature for it's capabilities.

Maybe you should start using python more and _then_ start discussions 
about it's features, when you have good grounds and can provide viable 
alternatives? But I guess that's a wish that won't be granted....

Diez


[1] 
http://groups.google.de/group/comp.lang.python/browse_thread/thread/a9a52694148fc52c/28c9ee2e1c64cdde#28c9ee2e1c64cdde


From mfmorss at aep.com  Fri Sep 14 10:30:01 2007
From: mfmorss at aep.com (Mark Morss)
Date: Fri, 14 Sep 2007 07:30:01 -0700
Subject: subclass of integers
Message-ID: <1189780201.692192.291010@k79g2000hse.googlegroups.com>

I would like to construct a class that includes both the integers and
None.  I desire that if x and y are elements of this class, and both
are integers, then arithmetic operations between them, such as x+y,
return the same result as integer addition.  However if either x or y
is None, these operations return None.

It's simple enough to construct a subclass of integers that behave in
this way:

class Nint(int):
    def __add__(self,other):
        if (other != None):
            return self+other
        else:
            return None
    def __radd__(self,other):
        if (other != None):
            return other+self
        else:
            return None
    #...and so forth

However I have not been able to figure out how to make it so that
None, as well as an integer, could be an element of my class.  My
preliminary impression is that I have to override int.__new__; but I
am uncertain how to do that and have been unable to find anything on
the web explaining that.  Indeed I haven't been able to find much
about __new__ at all.  Overriding this method of built-in classes
seems to be quite unusual.

I would very much appreciate anyone's help.



From deets at nospam.web.de  Fri Sep 28 15:06:13 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 28 Sep 2007 21:06:13 +0200
Subject: Python 3.0 migration plans?
References: <1191002679.569709.16870@22g2000hsm.googlegroups.com>
	<mailman.1242.1191003389.2658.python-list@python.org>
	<1191005906.556751.261940@22g2000hsm.googlegroups.com>
Message-ID: <5m51l4Fbao07U2@mid.uni-berlin.de>

TheFlyingDutchman wrote:

> On Sep 28, 11:16 am, Jean-Paul Calderone <exar... at divmod.com> wrote:
>> On Fri, 28 Sep 2007 11:04:39 -0700, TheFlyingDutchman <zzbba... at aol.com>
>> wrote:
>> > [snip]
>>
>> >In this case I asked it as part of the original question and it was
>> >ignored. I have programmed in C and C++ and a little Pascal many years
>> >ago. I don't remember anything about Higher Order Functions and would
>> >like to see exactly how you do it and to verify the contention.
>>
>> Perhaps you could do a bit of independent research.  Then your messages
>> to the group could contain more thoughtful questions and responses.
>>
> But you miss the fact that I am providing value to the group by
> providing unthoughtful questions and unthoughtful responses. By having
> most of the pocket protectors being thrown at me, I provide a
> diversion that allows others to speak more freely and without fear of
> reproach.

Or bind resources of these pocket protectors that otherwise would lead to
answers for people that do seek enlightment...

Diez


From duncan.booth at invalid.invalid  Tue Sep 18 03:41:03 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 18 Sep 2007 07:41:03 GMT
Subject: can Python be useful as functional?
References: <1190073045.618869.261290@k79g2000hse.googlegroups.com>
	<mailman.696.1190092326.2658.python-list@python.org>
	<1i4lvih.8g4kwjijx8e2N%aleax@mac.com>
	<mailman.700.1190096495.2658.python-list@python.org>
Message-ID: <Xns99AF57C3FA52Bduncanbooth@127.0.0.1>

"Rustom Mody" <rustompmody at gmail.com> wrote:

> On 9/18/07, Alex Martelli <aleax at mac.com> wrote:
>> Rustom Mody <rustompmody at gmail.com> wrote:
>>
>> > Can someone help? Heres the non-working code
>> >
>> > def si(l):
>> >     p = l.next()
>> >     yield p
>> >     (x for x in si(l) if x % p != 0)
>> >
>> > There should be an yield or return somewhere but cant figure it out
>>
>> Change last line to
>>
>>     for x in (x for x in si(l) if x % p != 0): yield x
> 
> 
> Thanks but why does
> 
> (yield(x) for x in si(l) if x % p != 0)
> 
> not work? I would have expected generator expression to play better
> with generators.

Why should it? It evaluates the expression which returns an object that 
just happens to be a generator and then as with any other expression 
that isn't assigned or returned it throws away the result.

> More generally, if one wants to 'splice in' a generator into the body
> of a generator, is there no standard pythonic idiom?

Yes there is, as Alex showed you the standard python idiom for a 
generator to yield all elements of an iteratable (whether it is a 
generator or any other iterable) is:

    for somevar in iterable: yield somevar

There have been various proposals in the past such as 'yield from 
iterable', but there doesn't seem any compelling case to introduce a new 
confusing syntax: the existing syntax works, and adding a special syntax 
wouldn't open the door to any performance benefits since the 
implementation would have to be pretty much the same (at most you would 
save a couple of local variable accesses).



From piet at cs.uu.nl  Thu Sep 13 04:34:35 2007
From: piet at cs.uu.nl (Piet van Oostrum)
Date: Thu, 13 Sep 2007 10:34:35 +0200
Subject: Python 3K or Python 2.9?
References: <1189567628.877156.27620@g4g2000hsf.googlegroups.com>
	<46e7974d$0$31726$426a74cc@news.free.fr>
	<fc8fc9$4qa$1@news2.carnet.hr> <5kq1hgF4r90oU1@mid.individual.net>
	<1189618530.872819.136450@57g2000hsv.googlegroups.com>
Message-ID: <m2tzpzj750.fsf@koshka.cs.uu.nl>

>>>>> TheFlyingDutchman <zzbbaadd at aol.com> (T) wrote:

>T> The confusing way about the current Python method when you first
>T> encounter it is
>T>  why is "self" being passed in when you write the function but not
>T> when you call it. 

It *is* passed when you call it, but it is written before the method name
instead of after it. Some people have called this an "infix" call similar
to infix operators.
-- 
Piet van Oostrum <piet at cs.uu.nl>
URL: http://www.cs.uu.nl/~piet [PGP 8DAE142BE17999C4]
Private email: piet at vanoostrum.org


From wizzardx at gmail.com  Fri Sep 21 15:27:48 2007
From: wizzardx at gmail.com (David)
Date: Fri, 21 Sep 2007 21:27:48 +0200
Subject: Google and Python
In-Reply-To: <1190235678.019823.315850@o80g2000hse.googlegroups.com>
References: <1190228512.627109.308910@n39g2000hsh.googlegroups.com>
	<ufadnRC5BPZm6GzbnZ2dnUVZ_jOdnZ2d@comcast.com>
	<1190231094.276099.136250@22g2000hsm.googlegroups.com>
	<mailman.781.1190232163.2658.python-list@python.org>
	<1190235678.019823.315850@o80g2000hse.googlegroups.com>
Message-ID: <18c1e6480709211227n6a96c7e8n8513a4cc38934b5@mail.gmail.com>

> OK, thanks. Would you know what technique the custom web server uses
> to invoke a C++ app (ditto for Java and Python) CGI is supposed to be
> too slow for large sites.

For large sites you would have modules loaded into your web server so
that executables don't have to be shelled for each request.

Another method is for the apps to run continuously and serve on non-80
port (or on 80 from another host), and your main web server on port 80
reverse proxies to it when appropriate.


From jstroud at mbi.ucla.edu  Fri Sep 14 19:29:52 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 14 Sep 2007 16:29:52 -0700
Subject: Extended slicing and Ellipsis - where are they used?
In-Reply-To: <1189751869.773724.165040@w3g2000hsg.googlegroups.com>
References: <1189699345.436400.233460@g4g2000hsf.googlegroups.com>
	<fcclfe$ur6$1@daisy.noc.ucla.edu>
	<1189751869.773724.165040@w3g2000hsg.googlegroups.com>
Message-ID: <fcf551$r71$1@daisy.noc.ucla.edu>

Paddy wrote:
> And the ellipses ... ?

;)


py> class Bob(dict):
...   def __getitem__(self, k, *args, **kwargs):
...     if k is Ellipsis:
...       return sorted(self.keys())
...     else:
...       return dict.__getitem__(self, k, *args, **kwargs)
...   def __setitem__(self, k, *args, **kwargs):
...     if k is Ellipsis:
...       raise KeyError, "Can't make elliptical assignments."
...     else:
...       return dict.__setitem__(self, k, *args, **kwargs)
...
py> b = Bob(a=1, b=2, c=3, d=15.5)
py> b
{'a': 1, 'b': 2, 'c': 3, 'd': 15.5}
py> for k in b[...]:
   print '%s ==> %s' % (k, b[k])
...
a ==> 1
b ==> 2
c ==> 3
d ==> 15.5
py> b[...] = 2
------------------------------------------------------------
Traceback (most recent call last):
   File "<ipython console>", line 1, in <module>
   File "<ipython console>", line 9, in __setitem__
<type 'exceptions.KeyError'>: "Can't make elliptical assignments."


From toby at tobiah.org  Tue Sep 25 15:40:40 2007
From: toby at tobiah.org (Tobiah)
Date: Tue, 25 Sep 2007 12:40:40 -0700
Subject: Who can develop the following Python script into working
	application ?
In-Reply-To: <5ll3c1F7k6d3U2@mid.uni-berlin.de>
References: <1190334828.210230.293980@50g2000hsm.googlegroups.com>
	<1190372423.768184.60080@19g2000hsx.googlegroups.com>
	<5lho31F84jgjU1@mid.uni-berlin.de>
	<1190419744.390216.19040@w3g2000hsg.googlegroups.com>
	<5lk9e0F8leeeU1@mid.uni-berlin.de>
	<m37imig4kj.fsf@netmaster.kds.com.ua>
	<5ll3c1F7k6d3U2@mid.uni-berlin.de>
Message-ID: <46f95801$0$26492$88260bb3@free.teranews.com>

Diez B. Roggisch wrote:
> Andrey Khavryuchenko schrieb:
>>  DBR> And as you said yourself:
>>
>>  DBR> """
>>  DBR> Frankly speaking I would prefer to pay for your kind assistance
>>  DBR> as it may take me to much time to learn some Python and 
>> understand the
>>  DBR> following script.
>>  DBR> """
>>
>>  DBR> Now, again: http://www.guru.com/ There you can get devlopers for
>>  DBR> money. So what again is your problem?
>>
>> Actually, I am a python (and django) developer, looking for a contract,
>> owning Nokia 770 and contacted original poster with no response.
> 
> Well, I presume the above quoted wasn't exactly true - in the end, the 
> whole attitude of the OP smelled after "I want you to do work for me for 
> free that I'm unwilling to bother myself with - as it would mean putting 
> effort into it."
> 
> Diez

Jeepers - It says right there in the quote that he is willing to pay.
I don't see why the OP is getting so much flack for his question, even
if it is thought to be a little off topic.


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



From rcdailey at gmail.com  Tue Sep 25 13:10:49 2007
From: rcdailey at gmail.com (Robert Dailey)
Date: Tue, 25 Sep 2007 12:10:49 -0500
Subject: Invoking python through C++: How to?
Message-ID: <496954360709251010q159199a4h9dd2b0e2ecad7a01@mail.gmail.com>

Hi,

I have a python script that I would like to invoke through my C++
application. Does anyone know of a trivial way of doing this? Right now the
only idea I can come up with is using system("python myscript.py") in C++.
Thanks.
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From carsten at uniqsys.com  Fri Sep 21 10:34:27 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 21 Sep 2007 10:34:27 -0400
Subject: __contains__() and overload of in : Bug or Feature ???
In-Reply-To: <1190383050.514560.232660@50g2000hsm.googlegroups.com>
References: <1190383050.514560.232660@50g2000hsm.googlegroups.com>
Message-ID: <1190385268.3393.13.camel@dot.uniqsys.com>

On Fri, 2007-09-21 at 13:57 +0000, sebastien.lannez at gmail.com wrote:
> Does it means that when overloading an operator, python just
> wrap the call to the method and keep control of the returned
> values ??? Is there a way to bypass this wrapping ???

The answers are "No in general, but yes in this case" and "No, not
easily."

Your problem is that the "in" operator is a comparison operator, which
by definition returns either True or False. Python is not meant to be
used as a Domain-Specific Language, so if you try to use it as one,
you'll run into limitations. The fact that comparison operators always
have boolean semantics is one of those limitations. (And yes, I imagine
this is a feature, so that callers of comparison operators don't have to
worry about checking whether the call really returned a boolean value,
they can just rely on the fact that it did.)

To bypass this behavior, I suppose you could try to change this by
modifying Python's source code directly, but who knows what you might
break in the process if you break the contract that "in" always returns
True or False.

In other words, try to find a different solution.

-- 
Carsten Haese
http://informixdb.sourceforge.net




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From deets at nospam.web.de  Mon Sep 24 10:47:13 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 24 Sep 2007 16:47:13 +0200
Subject: (pyqt) Parameters when connecting a signal to a method?
References: <1190644558.386647.88270@22g2000hsm.googlegroups.com>
Message-ID: <5lq0vhF9gj62U1@mid.uni-berlin.de>

exhuma.twn wrote:

> Some code:
> 
> ----------------------------------------------------------------------
> 
> def foobar(w):
>    print w
> 
> QtCore.QObject,connect( my_line_edit,
> QtCore.SIGNAL("returnPressed()"), foobar )
> 
> ----------------------------------------------------------------------
> 
> 
> How can I get this to work so "foobar" prints out the sender of the
> signal (i.e. my_line_edit)?

I _think_ there is a way to get the signals sender in Qt itself. But I'm
unsure how to get that.

Alternatively, you can use a closure to create a reference:

def foobar(source, w):
   print w

def slotgen(source, slot):
    def _slot(*args):
        return slot(*((source,) + args))
    return _slot

my_slot = slotgen(my_line_edit, foobar)

QtCore.QObject,connect( my_line_edit,
QtCore.SIGNAL("returnPressed()"), my_slot )

However, be careful to keep a reference to my_slot around! Otherwise, it
will be garbage collected!

diez


From xiaoyisheng at gmail.com  Thu Sep 13 04:20:34 2007
From: xiaoyisheng at gmail.com (Pacino)
Date: Thu, 13 Sep 2007 01:20:34 -0700
Subject: read part of jpeg file by pure python
Message-ID: <1189671634.712690.154580@o80g2000hse.googlegroups.com>

Hi, everyone,

I am wondering whether it's possible to read part (e.g. 1000*1000) of
a huge jpeg file (e.g. 30000*30000) and save it to another jpeg file
by pure python. I failed to read the whole file and split it, because
it would cost 2GB memory.

Can anyone help me? Any comments would be appreciated.

Thanks.

Robert



From vinay_sajip at yahoo.co.uk  Mon Sep 24 10:10:51 2007
From: vinay_sajip at yahoo.co.uk (Vinay Sajip)
Date: Mon, 24 Sep 2007 07:10:51 -0700
Subject: strange behavious of the logging module?
In-Reply-To: <fd7nf6$g14$02$1@news.t-online.com>
References: <fd6n9i$8hc$1@news1.zdv.uni-mainz.de>
	<fd7nf6$g14$02$1@news.t-online.com>
Message-ID: <1190643051.084144.230220@o80g2000hse.googlegroups.com>

On Sep 24, 8:03 am, Peter Otten <__pete... at web.de> wrote:
>
> It would still be a good idea to file a bug report.

Not sure where the bug is. The script below, when called, prints
"Information" to the console and "INFO     some_func Information" to
mc_rigid.log, as I would expect. (Python 2.5.1)

Best regards,

Vinay

import logging
logging.basicConfig(level=logging.DEBUG,
                    format='%(levelname)-8s %(funcName)-8s %
(message)s',
                    filename='mc_rigid.log',
                    filemode='w')
# define a Handler which writes INFO messages or higher to the
sys.stderr
console = logging.StreamHandler()
console.setLevel(logging.INFO)
# set a format which is simpler for console use
formatter = logging.Formatter('%(message)s')
# tell the handler to use this format
console.setFormatter(formatter)
# add the handler to the root logger
logging.getLogger('').addHandler(console)

def some_func():
    logging.info("Information")

if __name__ == "__main__":
    some_func()




From puredata at 11h11.com  Tue Sep 25 21:19:08 2007
From: puredata at 11h11.com (patrick)
Date: Tue, 25 Sep 2007 21:19:08 -0400
Subject: stopping a while True: with the keyboard
Message-ID: <46F9B38C.2090406@11h11.com>

hi all,

i am looking for a way to break a while True: when pressing "s" on my 
keyboard. how can i do this?

pat


From george.sakkis at gmail.com  Tue Sep 18 17:11:27 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: Tue, 18 Sep 2007 21:11:27 -0000
Subject: Extracting xml from html
In-Reply-To: <1190143908.594470.244440@y42g2000hsy.googlegroups.com>
References: <1190061079.025479.129070@w3g2000hsg.googlegroups.com>
	<mailman.676.1190065903.2658.python-list@python.org>
	<1190143908.594470.244440@y42g2000hsy.googlegroups.com>
Message-ID: <1190149887.079874.28060@n39g2000hsh.googlegroups.com>

On Sep 18, 3:31 pm, kyoso... at gmail.com wrote:
> On Sep 17, 4:51 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>
>
>
> > En Mon, 17 Sep 2007 17:31:19 -0300, <kyoso... at gmail.com> escribi?:
>
> > > I am attempting to extract some XML from an HTML document that I get
> > > returned from a form based web page. For some reason, I cannot figure
> > > out how to do this. I thought I could use the minidom module to do it,
> > > but all I get is a screwy traceback:
>
> > > Traceback (most recent call last):
> > >   File "C:\Python24\lib\xml\dom\expatbuilder.py", line 207, in
> > > parseFile
> > >     parser.Parse(buffer, 0)
> > > ExpatError: mismatched tag: line 1, column 357
>
> > So your HTML is not a well formed XML document, as many html pages, and
> > you can't use an XML parser. (even a valid HTML document may not be valid
> > XML). Let's try with some mismatched tags:
> > Depending on your document, you may prefer to extract the XML blocks using
> > BeautifulSoup, and then parse each one using BeautifulStoneSoup (the XML
> > parser) or xml.etree.ElementTree
>
> > --
> > Gabriel Genellina
>
> Thanks for the reply. I already knew about BeautifulSoup but I was
> hoping to avoid installing *yet another module* on my PC.

That's a poor excuse for a self-contained module in a single file.
"Installing" it can be as simple as having it in the same directory of
your module that imports it. Given that you can do in 2 lines what
took you around 15 with lxml, I wouldn't think it twice.

George